1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2018 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
30 /*#include "terminal.h" */
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
39 #include "observable.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "filestuff.h"
50 #include "gdb_sys_time.h"
52 #include "event-loop.h"
53 #include "event-top.h"
59 #include "gdbcore.h" /* for exec_bfd */
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
73 #include "record-btrace.h"
75 #include "common/scoped_restore.h"
77 #include "common/byte-vector.h"
79 /* Per-program-space data key. */
80 static const struct program_space_data
*remote_pspace_data
;
82 /* The variable registered as the control variable used by the
83 remote exec-file commands. While the remote exec-file setting is
84 per-program-space, the set/show machinery uses this as the
85 location of the remote exec-file value. */
86 static char *remote_exec_file_var
;
88 /* The size to align memory write packets, when practical. The protocol
89 does not guarantee any alignment, and gdb will generate short
90 writes and unaligned writes, but even as a best-effort attempt this
91 can improve bulk transfers. For instance, if a write is misaligned
92 relative to the target's data bus, the stub may need to make an extra
93 round trip fetching data from the target. This doesn't make a
94 huge difference, but it's easy to do, so we try to be helpful.
96 The alignment chosen is arbitrary; usually data bus width is
97 important here, not the possibly larger cache line size. */
98 enum { REMOTE_ALIGN_WRITES
= 16 };
100 /* Prototypes for local functions. */
101 static int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
102 static int getpkt_or_notif_sane (char **buf
, long *sizeof_buf
,
103 int forever
, int *is_notif
);
105 static void remote_files_info (struct target_ops
*ignore
);
107 static void remote_prepare_to_store (struct target_ops
*self
,
108 struct regcache
*regcache
);
110 static void remote_open_1 (const char *, int, struct target_ops
*,
113 static void remote_close (struct target_ops
*self
);
117 static int remote_vkill (int pid
, struct remote_state
*rs
);
119 static void remote_kill_k (void);
121 static void remote_mourn (struct target_ops
*ops
);
123 static void extended_remote_restart (void);
125 static void remote_send (char **buf
, long *sizeof_buf_p
);
127 static int readchar (int timeout
);
129 static void remote_serial_write (const char *str
, int len
);
131 static void remote_kill (struct target_ops
*ops
);
133 static int remote_can_async_p (struct target_ops
*);
135 static int remote_is_async_p (struct target_ops
*);
137 static void remote_async (struct target_ops
*ops
, int enable
);
139 static void remote_thread_events (struct target_ops
*ops
, int enable
);
141 static void interrupt_query (void);
143 static void set_general_thread (ptid_t ptid
);
144 static void set_continue_thread (ptid_t ptid
);
146 static void get_offsets (void);
148 static void skip_frame (void);
150 static long read_frame (char **buf_p
, long *sizeof_buf
);
152 static int hexnumlen (ULONGEST num
);
154 static void init_remote_ops (void);
156 static void init_extended_remote_ops (void);
158 static void remote_stop (struct target_ops
*self
, ptid_t
);
160 static int stubhex (int ch
);
162 static int hexnumstr (char *, ULONGEST
);
164 static int hexnumnstr (char *, ULONGEST
, int);
166 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
168 static void print_packet (const char *);
170 static int stub_unpack_int (char *buff
, int fieldlength
);
172 static ptid_t
remote_current_thread (ptid_t oldptid
);
174 static int putpkt_binary (const char *buf
, int cnt
);
176 static void check_binary_download (CORE_ADDR addr
);
178 struct packet_config
;
180 static void show_packet_config_cmd (struct packet_config
*config
);
182 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
184 struct cmd_list_element
*c
,
187 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
188 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
190 static void remote_set_permissions (struct target_ops
*self
);
192 static int remote_get_trace_status (struct target_ops
*self
,
193 struct trace_status
*ts
);
195 static int remote_upload_tracepoints (struct target_ops
*self
,
196 struct uploaded_tp
**utpp
);
198 static int remote_upload_trace_state_variables (struct target_ops
*self
,
199 struct uploaded_tsv
**utsvp
);
201 static void remote_query_supported (void);
203 static void remote_check_symbols (void);
206 static void stop_reply_xfree (struct stop_reply
*);
207 static void remote_parse_stop_reply (char *, struct stop_reply
*);
208 static void push_stop_reply (struct stop_reply
*);
209 static void discard_pending_stop_replies_in_queue (struct remote_state
*);
210 static int peek_stop_reply (ptid_t ptid
);
212 struct threads_listing_context
;
213 static void remove_new_fork_children (struct threads_listing_context
*);
215 static void remote_async_inferior_event_handler (gdb_client_data
);
217 static void remote_terminal_ours (struct target_ops
*self
);
219 static int remote_read_description_p (struct target_ops
*target
);
221 static void remote_console_output (char *msg
);
223 static int remote_supports_cond_breakpoints (struct target_ops
*self
);
225 static int remote_can_run_breakpoint_commands (struct target_ops
*self
);
227 static void remote_btrace_reset (void);
229 static void remote_btrace_maybe_reopen (void);
231 static int stop_reply_queue_length (void);
233 static void readahead_cache_invalidate (void);
235 static void remote_unpush_and_throw (void);
237 static struct remote_state
*get_remote_state (void);
241 static struct cmd_list_element
*remote_cmdlist
;
243 /* For "set remote" and "show remote". */
245 static struct cmd_list_element
*remote_set_cmdlist
;
246 static struct cmd_list_element
*remote_show_cmdlist
;
248 /* Stub vCont actions support.
250 Each field is a boolean flag indicating whether the stub reports
251 support for the corresponding action. */
253 struct vCont_action_support
268 /* Controls whether GDB is willing to use range stepping. */
270 static int use_range_stepping
= 1;
272 #define OPAQUETHREADBYTES 8
274 /* a 64 bit opaque identifier */
275 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
277 /* About this many threadisds fit in a packet. */
279 #define MAXTHREADLISTRESULTS 32
281 /* The max number of chars in debug output. The rest of chars are
284 #define REMOTE_DEBUG_MAX_CHAR 512
286 /* Data for the vFile:pread readahead cache. */
288 struct readahead_cache
290 /* The file descriptor for the file that is being cached. -1 if the
294 /* The offset into the file that the cache buffer corresponds
298 /* The buffer holding the cache contents. */
300 /* The buffer's size. We try to read as much as fits into a packet
304 /* Cache hit and miss counters. */
309 /* Description of the remote protocol state for the currently
310 connected target. This is per-target state, and independent of the
311 selected architecture. */
315 /* A buffer to use for incoming packets, and its current size. The
316 buffer is grown dynamically for larger incoming packets.
317 Outgoing packets may also be constructed in this buffer.
318 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
319 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
324 /* True if we're going through initial connection setup (finding out
325 about the remote side's threads, relocating symbols, etc.). */
328 /* If we negotiated packet size explicitly (and thus can bypass
329 heuristics for the largest packet size that will not overflow
330 a buffer in the stub), this will be set to that packet size.
331 Otherwise zero, meaning to use the guessed size. */
332 long explicit_packet_size
;
334 /* remote_wait is normally called when the target is running and
335 waits for a stop reply packet. But sometimes we need to call it
336 when the target is already stopped. We can send a "?" packet
337 and have remote_wait read the response. Or, if we already have
338 the response, we can stash it in BUF and tell remote_wait to
339 skip calling getpkt. This flag is set when BUF contains a
340 stop reply packet and the target is not waiting. */
341 int cached_wait_status
;
343 /* True, if in no ack mode. That is, neither GDB nor the stub will
344 expect acks from each other. The connection is assumed to be
348 /* True if we're connected in extended remote mode. */
351 /* True if we resumed the target and we're waiting for the target to
352 stop. In the mean time, we can't start another command/query.
353 The remote server wouldn't be ready to process it, so we'd
354 timeout waiting for a reply that would never come and eventually
355 we'd close the connection. This can happen in asynchronous mode
356 because we allow GDB commands while the target is running. */
357 int waiting_for_stop_reply
;
359 /* The status of the stub support for the various vCont actions. */
360 struct vCont_action_support supports_vCont
;
362 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
363 responded to that. */
366 /* True if we saw a Ctrl-C while reading or writing from/to the
367 remote descriptor. At that point it is not safe to send a remote
368 interrupt packet, so we instead remember we saw the Ctrl-C and
369 process it once we're done with sending/receiving the current
370 packet, which should be shortly. If however that takes too long,
371 and the user presses Ctrl-C again, we offer to disconnect. */
372 int got_ctrlc_during_io
;
374 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
375 remote_open knows that we don't have a file open when the program
377 struct serial
*remote_desc
;
379 /* These are the threads which we last sent to the remote system. The
380 TID member will be -1 for all or -2 for not sent yet. */
381 ptid_t general_thread
;
382 ptid_t continue_thread
;
384 /* This is the traceframe which we last selected on the remote system.
385 It will be -1 if no traceframe is selected. */
386 int remote_traceframe_number
;
388 char *last_pass_packet
;
390 /* The last QProgramSignals packet sent to the target. We bypass
391 sending a new program signals list down to the target if the new
392 packet is exactly the same as the last we sent. IOW, we only let
393 the target know about program signals list changes. */
394 char *last_program_signals_packet
;
396 enum gdb_signal last_sent_signal
;
400 /* The execution direction of the last resume we got. */
401 enum exec_direction_kind last_resume_exec_dir
;
403 char *finished_object
;
404 char *finished_annex
;
405 ULONGEST finished_offset
;
407 /* Should we try the 'ThreadInfo' query packet?
409 This variable (NOT available to the user: auto-detect only!)
410 determines whether GDB will use the new, simpler "ThreadInfo"
411 query or the older, more complex syntax for thread queries.
412 This is an auto-detect variable (set to true at each connect,
413 and set to false when the target fails to recognize it). */
414 int use_threadinfo_query
;
415 int use_threadextra_query
;
417 threadref echo_nextthread
;
418 threadref nextthread
;
419 threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
421 /* The state of remote notification. */
422 struct remote_notif_state
*notif_state
;
424 /* The branch trace configuration. */
425 struct btrace_config btrace_config
;
427 /* The argument to the last "vFile:setfs:" packet we sent, used
428 to avoid sending repeated unnecessary "vFile:setfs:" packets.
429 Initialized to -1 to indicate that no "vFile:setfs:" packet
430 has yet been sent. */
433 /* A readahead cache for vFile:pread. Often, reading a binary
434 involves a sequence of small reads. E.g., when parsing an ELF
435 file. A readahead cache helps mostly the case of remote
436 debugging on a connection with higher latency, due to the
437 request/reply nature of the RSP. We only cache data for a single
438 file descriptor at a time. */
439 struct readahead_cache readahead_cache
;
442 /* Private data that we'll store in (struct thread_info)->priv. */
443 struct remote_thread_info
: public private_thread_info
449 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
450 sequence of bytes. */
451 gdb::byte_vector thread_handle
;
453 /* Whether the target stopped for a breakpoint/watchpoint. */
454 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
456 /* This is set to the data address of the access causing the target
457 to stop for a watchpoint. */
458 CORE_ADDR watch_data_address
= 0;
460 /* Fields used by the vCont action coalescing implemented in
461 remote_resume / remote_commit_resume. remote_resume stores each
462 thread's last resume request in these fields, so that a later
463 remote_commit_resume knows which is the proper action for this
464 thread to include in the vCont packet. */
466 /* True if the last target_resume call for this thread was a step
467 request, false if a continue request. */
468 int last_resume_step
= 0;
470 /* The signal specified in the last target_resume call for this
472 gdb_signal last_resume_sig
= GDB_SIGNAL_0
;
474 /* Whether this thread was already vCont-resumed on the remote
476 int vcont_resumed
= 0;
479 /* This data could be associated with a target, but we do not always
480 have access to the current target when we need it, so for now it is
481 static. This will be fine for as long as only one target is in use
483 static struct remote_state
*remote_state
;
485 static struct remote_state
*
486 get_remote_state_raw (void)
491 /* Allocate a new struct remote_state with xmalloc, initialize it, and
494 static struct remote_state
*
495 new_remote_state (void)
497 struct remote_state
*result
= XCNEW (struct remote_state
);
499 /* The default buffer size is unimportant; it will be expanded
500 whenever a larger buffer is needed. */
501 result
->buf_size
= 400;
502 result
->buf
= (char *) xmalloc (result
->buf_size
);
503 result
->remote_traceframe_number
= -1;
504 result
->last_sent_signal
= GDB_SIGNAL_0
;
505 result
->last_resume_exec_dir
= EXEC_FORWARD
;
511 /* Description of the remote protocol for a given architecture. */
515 long offset
; /* Offset into G packet. */
516 long regnum
; /* GDB's internal register number. */
517 LONGEST pnum
; /* Remote protocol register number. */
518 int in_g_packet
; /* Always part of G packet. */
519 /* long size in bytes; == register_size (target_gdbarch (), regnum);
521 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
525 struct remote_arch_state
527 /* Description of the remote protocol registers. */
528 long sizeof_g_packet
;
530 /* Description of the remote protocol registers indexed by REGNUM
531 (making an array gdbarch_num_regs in size). */
532 struct packet_reg
*regs
;
534 /* This is the size (in chars) of the first response to the ``g''
535 packet. It is used as a heuristic when determining the maximum
536 size of memory-read and memory-write packets. A target will
537 typically only reserve a buffer large enough to hold the ``g''
538 packet. The size does not include packet overhead (headers and
540 long actual_register_packet_size
;
542 /* This is the maximum size (in chars) of a non read/write packet.
543 It is also used as a cap on the size of read/write packets. */
544 long remote_packet_size
;
547 /* Utility: generate error from an incoming stub packet. */
549 trace_error (char *buf
)
552 return; /* not an error msg */
555 case '1': /* malformed packet error */
556 if (*++buf
== '0') /* general case: */
557 error (_("remote.c: error in outgoing packet."));
559 error (_("remote.c: error in outgoing packet at field #%ld."),
560 strtol (buf
, NULL
, 16));
562 error (_("Target returns error code '%s'."), buf
);
566 /* Utility: wait for reply from stub, while accepting "O" packets. */
569 remote_get_noisy_reply ()
571 struct remote_state
*rs
= get_remote_state ();
573 do /* Loop on reply from remote stub. */
577 QUIT
; /* Allow user to bail out with ^C. */
578 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
582 else if (startswith (buf
, "qRelocInsn:"))
585 CORE_ADDR from
, to
, org_to
;
587 int adjusted_size
= 0;
590 p
= buf
+ strlen ("qRelocInsn:");
591 pp
= unpack_varlen_hex (p
, &ul
);
593 error (_("invalid qRelocInsn packet: %s"), buf
);
597 unpack_varlen_hex (p
, &ul
);
604 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
607 CATCH (ex
, RETURN_MASK_ALL
)
609 if (ex
.error
== MEMORY_ERROR
)
611 /* Propagate memory errors silently back to the
612 target. The stub may have limited the range of
613 addresses we can write to, for example. */
617 /* Something unexpectedly bad happened. Be verbose
618 so we can tell what, and propagate the error back
619 to the stub, so it doesn't get stuck waiting for
621 exception_fprintf (gdb_stderr
, ex
,
622 _("warning: relocating instruction: "));
630 adjusted_size
= to
- org_to
;
632 xsnprintf (buf
, rs
->buf_size
, "qRelocInsn:%x", adjusted_size
);
636 else if (buf
[0] == 'O' && buf
[1] != 'K')
637 remote_console_output (buf
+ 1); /* 'O' message from stub */
639 return buf
; /* Here's the actual reply. */
644 /* Handle for retreving the remote protocol data from gdbarch. */
645 static struct gdbarch_data
*remote_gdbarch_data_handle
;
647 static struct remote_arch_state
*
648 get_remote_arch_state (struct gdbarch
*gdbarch
)
650 gdb_assert (gdbarch
!= NULL
);
651 return ((struct remote_arch_state
*)
652 gdbarch_data (gdbarch
, remote_gdbarch_data_handle
));
655 /* Fetch the global remote target state. */
657 static struct remote_state
*
658 get_remote_state (void)
660 /* Make sure that the remote architecture state has been
661 initialized, because doing so might reallocate rs->buf. Any
662 function which calls getpkt also needs to be mindful of changes
663 to rs->buf, but this call limits the number of places which run
665 get_remote_arch_state (target_gdbarch ());
667 return get_remote_state_raw ();
670 /* Cleanup routine for the remote module's pspace data. */
673 remote_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
675 char *remote_exec_file
= (char *) arg
;
677 xfree (remote_exec_file
);
680 /* Fetch the remote exec-file from the current program space. */
683 get_remote_exec_file (void)
685 char *remote_exec_file
;
688 = (char *) program_space_data (current_program_space
,
690 if (remote_exec_file
== NULL
)
693 return remote_exec_file
;
696 /* Set the remote exec file for PSPACE. */
699 set_pspace_remote_exec_file (struct program_space
*pspace
,
700 char *remote_exec_file
)
702 char *old_file
= (char *) program_space_data (pspace
, remote_pspace_data
);
705 set_program_space_data (pspace
, remote_pspace_data
,
706 xstrdup (remote_exec_file
));
709 /* The "set/show remote exec-file" set command hook. */
712 set_remote_exec_file (const char *ignored
, int from_tty
,
713 struct cmd_list_element
*c
)
715 gdb_assert (remote_exec_file_var
!= NULL
);
716 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
719 /* The "set/show remote exec-file" show command hook. */
722 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
723 struct cmd_list_element
*cmd
, const char *value
)
725 fprintf_filtered (file
, "%s\n", remote_exec_file_var
);
729 compare_pnums (const void *lhs_
, const void *rhs_
)
731 const struct packet_reg
* const *lhs
732 = (const struct packet_reg
* const *) lhs_
;
733 const struct packet_reg
* const *rhs
734 = (const struct packet_reg
* const *) rhs_
;
736 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
738 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
745 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
747 int regnum
, num_remote_regs
, offset
;
748 struct packet_reg
**remote_regs
;
750 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
752 struct packet_reg
*r
= ®s
[regnum
];
754 if (register_size (gdbarch
, regnum
) == 0)
755 /* Do not try to fetch zero-sized (placeholder) registers. */
758 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
763 /* Define the g/G packet format as the contents of each register
764 with a remote protocol number, in order of ascending protocol
767 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
768 for (num_remote_regs
= 0, regnum
= 0;
769 regnum
< gdbarch_num_regs (gdbarch
);
771 if (regs
[regnum
].pnum
!= -1)
772 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
774 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
777 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
779 remote_regs
[regnum
]->in_g_packet
= 1;
780 remote_regs
[regnum
]->offset
= offset
;
781 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
787 /* Given the architecture described by GDBARCH, return the remote
788 protocol register's number and the register's offset in the g/G
789 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
790 If the target does not have a mapping for REGNUM, return false,
791 otherwise, return true. */
794 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
795 int *pnum
, int *poffset
)
797 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
799 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
801 map_regcache_remote_table (gdbarch
, regs
.data ());
803 *pnum
= regs
[regnum
].pnum
;
804 *poffset
= regs
[regnum
].offset
;
810 init_remote_state (struct gdbarch
*gdbarch
)
812 struct remote_state
*rs
= get_remote_state_raw ();
813 struct remote_arch_state
*rsa
;
815 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
817 /* Use the architecture to build a regnum<->pnum table, which will be
818 1:1 unless a feature set specifies otherwise. */
819 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
820 gdbarch_num_regs (gdbarch
),
823 /* Record the maximum possible size of the g packet - it may turn out
825 rsa
->sizeof_g_packet
= map_regcache_remote_table (gdbarch
, rsa
->regs
);
827 /* Default maximum number of characters in a packet body. Many
828 remote stubs have a hardwired buffer size of 400 bytes
829 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
830 as the maximum packet-size to ensure that the packet and an extra
831 NUL character can always fit in the buffer. This stops GDB
832 trashing stubs that try to squeeze an extra NUL into what is
833 already a full buffer (As of 1999-12-04 that was most stubs). */
834 rsa
->remote_packet_size
= 400 - 1;
836 /* This one is filled in when a ``g'' packet is received. */
837 rsa
->actual_register_packet_size
= 0;
839 /* Should rsa->sizeof_g_packet needs more space than the
840 default, adjust the size accordingly. Remember that each byte is
841 encoded as two characters. 32 is the overhead for the packet
842 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
843 (``$NN:G...#NN'') is a better guess, the below has been padded a
845 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
846 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
848 /* Make sure that the packet buffer is plenty big enough for
849 this architecture. */
850 if (rs
->buf_size
< rsa
->remote_packet_size
)
852 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
853 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
859 /* Return the current allowed size of a remote packet. This is
860 inferred from the current architecture, and should be used to
861 limit the length of outgoing packets. */
863 get_remote_packet_size (void)
865 struct remote_state
*rs
= get_remote_state ();
866 remote_arch_state
*rsa
= get_remote_arch_state (target_gdbarch ());
868 if (rs
->explicit_packet_size
)
869 return rs
->explicit_packet_size
;
871 return rsa
->remote_packet_size
;
874 static struct packet_reg
*
875 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
878 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
882 struct packet_reg
*r
= &rsa
->regs
[regnum
];
884 gdb_assert (r
->regnum
== regnum
);
889 static struct packet_reg
*
890 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
895 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
897 struct packet_reg
*r
= &rsa
->regs
[i
];
905 static struct target_ops remote_ops
;
907 static struct target_ops extended_remote_ops
;
909 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
910 ``forever'' still use the normal timeout mechanism. This is
911 currently used by the ASYNC code to guarentee that target reads
912 during the initial connect always time-out. Once getpkt has been
913 modified to return a timeout indication and, in turn
914 remote_wait()/wait_for_inferior() have gained a timeout parameter
916 static int wait_forever_enabled_p
= 1;
918 /* Allow the user to specify what sequence to send to the remote
919 when he requests a program interruption: Although ^C is usually
920 what remote systems expect (this is the default, here), it is
921 sometimes preferable to send a break. On other systems such
922 as the Linux kernel, a break followed by g, which is Magic SysRq g
923 is required in order to interrupt the execution. */
924 const char interrupt_sequence_control_c
[] = "Ctrl-C";
925 const char interrupt_sequence_break
[] = "BREAK";
926 const char interrupt_sequence_break_g
[] = "BREAK-g";
927 static const char *const interrupt_sequence_modes
[] =
929 interrupt_sequence_control_c
,
930 interrupt_sequence_break
,
931 interrupt_sequence_break_g
,
934 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
937 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
938 struct cmd_list_element
*c
,
941 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
942 fprintf_filtered (file
,
943 _("Send the ASCII ETX character (Ctrl-c) "
944 "to the remote target to interrupt the "
945 "execution of the program.\n"));
946 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
947 fprintf_filtered (file
,
948 _("send a break signal to the remote target "
949 "to interrupt the execution of the program.\n"));
950 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
951 fprintf_filtered (file
,
952 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
953 "the remote target to interrupt the execution "
954 "of Linux kernel.\n"));
956 internal_error (__FILE__
, __LINE__
,
957 _("Invalid value for interrupt_sequence_mode: %s."),
958 interrupt_sequence_mode
);
961 /* This boolean variable specifies whether interrupt_sequence is sent
962 to the remote target when gdb connects to it.
963 This is mostly needed when you debug the Linux kernel: The Linux kernel
964 expects BREAK g which is Magic SysRq g for connecting gdb. */
965 static int interrupt_on_connect
= 0;
967 /* This variable is used to implement the "set/show remotebreak" commands.
968 Since these commands are now deprecated in favor of "set/show remote
969 interrupt-sequence", it no longer has any effect on the code. */
970 static int remote_break
;
973 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
976 interrupt_sequence_mode
= interrupt_sequence_break
;
978 interrupt_sequence_mode
= interrupt_sequence_control_c
;
982 show_remotebreak (struct ui_file
*file
, int from_tty
,
983 struct cmd_list_element
*c
,
988 /* This variable sets the number of bits in an address that are to be
989 sent in a memory ("M" or "m") packet. Normally, after stripping
990 leading zeros, the entire address would be sent. This variable
991 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
992 initial implementation of remote.c restricted the address sent in
993 memory packets to ``host::sizeof long'' bytes - (typically 32
994 bits). Consequently, for 64 bit targets, the upper 32 bits of an
995 address was never sent. Since fixing this bug may cause a break in
996 some remote targets this variable is principly provided to
997 facilitate backward compatibility. */
999 static unsigned int remote_address_size
;
1002 /* User configurable variables for the number of characters in a
1003 memory read/write packet. MIN (rsa->remote_packet_size,
1004 rsa->sizeof_g_packet) is the default. Some targets need smaller
1005 values (fifo overruns, et.al.) and some users need larger values
1006 (speed up transfers). The variables ``preferred_*'' (the user
1007 request), ``current_*'' (what was actually set) and ``forced_*''
1008 (Positive - a soft limit, negative - a hard limit). */
1010 struct memory_packet_config
1017 /* The default max memory-write-packet-size. The 16k is historical.
1018 (It came from older GDB's using alloca for buffers and the
1019 knowledge (folklore?) that some hosts don't cope very well with
1020 large alloca calls.) */
1021 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1023 /* The minimum remote packet size for memory transfers. Ensures we
1024 can write at least one byte. */
1025 #define MIN_MEMORY_PACKET_SIZE 20
1027 /* Compute the current size of a read/write packet. Since this makes
1028 use of ``actual_register_packet_size'' the computation is dynamic. */
1031 get_memory_packet_size (struct memory_packet_config
*config
)
1033 struct remote_state
*rs
= get_remote_state ();
1034 remote_arch_state
*rsa
= get_remote_arch_state (target_gdbarch ());
1037 if (config
->fixed_p
)
1039 if (config
->size
<= 0)
1040 what_they_get
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1042 what_they_get
= config
->size
;
1046 what_they_get
= get_remote_packet_size ();
1047 /* Limit the packet to the size specified by the user. */
1048 if (config
->size
> 0
1049 && what_they_get
> config
->size
)
1050 what_they_get
= config
->size
;
1052 /* Limit it to the size of the targets ``g'' response unless we have
1053 permission from the stub to use a larger packet size. */
1054 if (rs
->explicit_packet_size
== 0
1055 && rsa
->actual_register_packet_size
> 0
1056 && what_they_get
> rsa
->actual_register_packet_size
)
1057 what_they_get
= rsa
->actual_register_packet_size
;
1059 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1060 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1062 /* Make sure there is room in the global buffer for this packet
1063 (including its trailing NUL byte). */
1064 if (rs
->buf_size
< what_they_get
+ 1)
1066 rs
->buf_size
= 2 * what_they_get
;
1067 rs
->buf
= (char *) xrealloc (rs
->buf
, 2 * what_they_get
);
1070 return what_they_get
;
1073 /* Update the size of a read/write packet. If they user wants
1074 something really big then do a sanity check. */
1077 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1079 int fixed_p
= config
->fixed_p
;
1080 long size
= config
->size
;
1083 error (_("Argument required (integer, `fixed' or `limited')."));
1084 else if (strcmp (args
, "hard") == 0
1085 || strcmp (args
, "fixed") == 0)
1087 else if (strcmp (args
, "soft") == 0
1088 || strcmp (args
, "limit") == 0)
1094 size
= strtoul (args
, &end
, 0);
1096 error (_("Invalid %s (bad syntax)."), config
->name
);
1098 /* Instead of explicitly capping the size of a packet to or
1099 disallowing it, the user is allowed to set the size to
1100 something arbitrarily large. */
1103 /* So that the query shows the correct value. */
1105 size
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1108 if (fixed_p
&& !config
->fixed_p
)
1110 if (! query (_("The target may not be able to correctly handle a %s\n"
1111 "of %ld bytes. Change the packet size? "),
1112 config
->name
, size
))
1113 error (_("Packet size not changed."));
1115 /* Update the config. */
1116 config
->fixed_p
= fixed_p
;
1117 config
->size
= size
;
1121 show_memory_packet_size (struct memory_packet_config
*config
)
1123 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1124 if (config
->fixed_p
)
1125 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1126 get_memory_packet_size (config
));
1128 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1129 get_memory_packet_size (config
));
1132 static struct memory_packet_config memory_write_packet_config
=
1134 "memory-write-packet-size",
1138 set_memory_write_packet_size (const char *args
, int from_tty
)
1140 set_memory_packet_size (args
, &memory_write_packet_config
);
1144 show_memory_write_packet_size (const char *args
, int from_tty
)
1146 show_memory_packet_size (&memory_write_packet_config
);
1150 get_memory_write_packet_size (void)
1152 return get_memory_packet_size (&memory_write_packet_config
);
1155 static struct memory_packet_config memory_read_packet_config
=
1157 "memory-read-packet-size",
1161 set_memory_read_packet_size (const char *args
, int from_tty
)
1163 set_memory_packet_size (args
, &memory_read_packet_config
);
1167 show_memory_read_packet_size (const char *args
, int from_tty
)
1169 show_memory_packet_size (&memory_read_packet_config
);
1173 get_memory_read_packet_size (void)
1175 long size
= get_memory_packet_size (&memory_read_packet_config
);
1177 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1178 extra buffer size argument before the memory read size can be
1179 increased beyond this. */
1180 if (size
> get_remote_packet_size ())
1181 size
= get_remote_packet_size ();
1186 /* Generic configuration support for packets the stub optionally
1187 supports. Allows the user to specify the use of the packet as well
1188 as allowing GDB to auto-detect support in the remote stub. */
1192 PACKET_SUPPORT_UNKNOWN
= 0,
1197 struct packet_config
1202 /* If auto, GDB auto-detects support for this packet or feature,
1203 either through qSupported, or by trying the packet and looking
1204 at the response. If true, GDB assumes the target supports this
1205 packet. If false, the packet is disabled. Configs that don't
1206 have an associated command always have this set to auto. */
1207 enum auto_boolean detect
;
1209 /* Does the target support this packet? */
1210 enum packet_support support
;
1213 /* Analyze a packet's return value and update the packet config
1223 static enum packet_support
packet_config_support (struct packet_config
*config
);
1224 static enum packet_support
packet_support (int packet
);
1227 show_packet_config_cmd (struct packet_config
*config
)
1229 const char *support
= "internal-error";
1231 switch (packet_config_support (config
))
1234 support
= "enabled";
1236 case PACKET_DISABLE
:
1237 support
= "disabled";
1239 case PACKET_SUPPORT_UNKNOWN
:
1240 support
= "unknown";
1243 switch (config
->detect
)
1245 case AUTO_BOOLEAN_AUTO
:
1246 printf_filtered (_("Support for the `%s' packet "
1247 "is auto-detected, currently %s.\n"),
1248 config
->name
, support
);
1250 case AUTO_BOOLEAN_TRUE
:
1251 case AUTO_BOOLEAN_FALSE
:
1252 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1253 config
->name
, support
);
1259 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1260 const char *title
, int legacy
)
1266 config
->name
= name
;
1267 config
->title
= title
;
1268 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1270 show_doc
= xstrprintf ("Show current use of remote "
1271 "protocol `%s' (%s) packet",
1273 /* set/show TITLE-packet {auto,on,off} */
1274 cmd_name
= xstrprintf ("%s-packet", title
);
1275 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1276 &config
->detect
, set_doc
,
1277 show_doc
, NULL
, /* help_doc */
1279 show_remote_protocol_packet_cmd
,
1280 &remote_set_cmdlist
, &remote_show_cmdlist
);
1281 /* The command code copies the documentation strings. */
1284 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1289 legacy_name
= xstrprintf ("%s-packet", name
);
1290 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1291 &remote_set_cmdlist
);
1292 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1293 &remote_show_cmdlist
);
1297 static enum packet_result
1298 packet_check_result (const char *buf
)
1302 /* The stub recognized the packet request. Check that the
1303 operation succeeded. */
1305 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1307 /* "Enn" - definitly an error. */
1308 return PACKET_ERROR
;
1310 /* Always treat "E." as an error. This will be used for
1311 more verbose error messages, such as E.memtypes. */
1312 if (buf
[0] == 'E' && buf
[1] == '.')
1313 return PACKET_ERROR
;
1315 /* The packet may or may not be OK. Just assume it is. */
1319 /* The stub does not support the packet. */
1320 return PACKET_UNKNOWN
;
1323 static enum packet_result
1324 packet_ok (const char *buf
, struct packet_config
*config
)
1326 enum packet_result result
;
1328 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1329 && config
->support
== PACKET_DISABLE
)
1330 internal_error (__FILE__
, __LINE__
,
1331 _("packet_ok: attempt to use a disabled packet"));
1333 result
= packet_check_result (buf
);
1338 /* The stub recognized the packet request. */
1339 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1342 fprintf_unfiltered (gdb_stdlog
,
1343 "Packet %s (%s) is supported\n",
1344 config
->name
, config
->title
);
1345 config
->support
= PACKET_ENABLE
;
1348 case PACKET_UNKNOWN
:
1349 /* The stub does not support the packet. */
1350 if (config
->detect
== AUTO_BOOLEAN_AUTO
1351 && config
->support
== PACKET_ENABLE
)
1353 /* If the stub previously indicated that the packet was
1354 supported then there is a protocol error. */
1355 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1356 config
->name
, config
->title
);
1358 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1360 /* The user set it wrong. */
1361 error (_("Enabled packet %s (%s) not recognized by stub"),
1362 config
->name
, config
->title
);
1366 fprintf_unfiltered (gdb_stdlog
,
1367 "Packet %s (%s) is NOT supported\n",
1368 config
->name
, config
->title
);
1369 config
->support
= PACKET_DISABLE
;
1390 PACKET_vFile_pwrite
,
1392 PACKET_vFile_unlink
,
1393 PACKET_vFile_readlink
,
1396 PACKET_qXfer_features
,
1397 PACKET_qXfer_exec_file
,
1398 PACKET_qXfer_libraries
,
1399 PACKET_qXfer_libraries_svr4
,
1400 PACKET_qXfer_memory_map
,
1401 PACKET_qXfer_spu_read
,
1402 PACKET_qXfer_spu_write
,
1403 PACKET_qXfer_osdata
,
1404 PACKET_qXfer_threads
,
1405 PACKET_qXfer_statictrace_read
,
1406 PACKET_qXfer_traceframe_info
,
1412 PACKET_QPassSignals
,
1413 PACKET_QCatchSyscalls
,
1414 PACKET_QProgramSignals
,
1415 PACKET_QSetWorkingDir
,
1416 PACKET_QStartupWithShell
,
1417 PACKET_QEnvironmentHexEncoded
,
1418 PACKET_QEnvironmentReset
,
1419 PACKET_QEnvironmentUnset
,
1421 PACKET_qSearch_memory
,
1424 PACKET_QStartNoAckMode
,
1426 PACKET_qXfer_siginfo_read
,
1427 PACKET_qXfer_siginfo_write
,
1430 /* Support for conditional tracepoints. */
1431 PACKET_ConditionalTracepoints
,
1433 /* Support for target-side breakpoint conditions. */
1434 PACKET_ConditionalBreakpoints
,
1436 /* Support for target-side breakpoint commands. */
1437 PACKET_BreakpointCommands
,
1439 /* Support for fast tracepoints. */
1440 PACKET_FastTracepoints
,
1442 /* Support for static tracepoints. */
1443 PACKET_StaticTracepoints
,
1445 /* Support for installing tracepoints while a trace experiment is
1447 PACKET_InstallInTrace
,
1451 PACKET_TracepointSource
,
1454 PACKET_QDisableRandomization
,
1456 PACKET_QTBuffer_size
,
1460 PACKET_qXfer_btrace
,
1462 /* Support for the QNonStop packet. */
1465 /* Support for the QThreadEvents packet. */
1466 PACKET_QThreadEvents
,
1468 /* Support for multi-process extensions. */
1469 PACKET_multiprocess_feature
,
1471 /* Support for enabling and disabling tracepoints while a trace
1472 experiment is running. */
1473 PACKET_EnableDisableTracepoints_feature
,
1475 /* Support for collecting strings using the tracenz bytecode. */
1476 PACKET_tracenz_feature
,
1478 /* Support for continuing to run a trace experiment while GDB is
1480 PACKET_DisconnectedTracing_feature
,
1482 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1483 PACKET_augmented_libraries_svr4_read_feature
,
1485 /* Support for the qXfer:btrace-conf:read packet. */
1486 PACKET_qXfer_btrace_conf
,
1488 /* Support for the Qbtrace-conf:bts:size packet. */
1489 PACKET_Qbtrace_conf_bts_size
,
1491 /* Support for swbreak+ feature. */
1492 PACKET_swbreak_feature
,
1494 /* Support for hwbreak+ feature. */
1495 PACKET_hwbreak_feature
,
1497 /* Support for fork events. */
1498 PACKET_fork_event_feature
,
1500 /* Support for vfork events. */
1501 PACKET_vfork_event_feature
,
1503 /* Support for the Qbtrace-conf:pt:size packet. */
1504 PACKET_Qbtrace_conf_pt_size
,
1506 /* Support for exec events. */
1507 PACKET_exec_event_feature
,
1509 /* Support for query supported vCont actions. */
1510 PACKET_vContSupported
,
1512 /* Support remote CTRL-C. */
1515 /* Support TARGET_WAITKIND_NO_RESUMED. */
1521 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1523 /* Returns the packet's corresponding "set remote foo-packet" command
1524 state. See struct packet_config for more details. */
1526 static enum auto_boolean
1527 packet_set_cmd_state (int packet
)
1529 return remote_protocol_packets
[packet
].detect
;
1532 /* Returns whether a given packet or feature is supported. This takes
1533 into account the state of the corresponding "set remote foo-packet"
1534 command, which may be used to bypass auto-detection. */
1536 static enum packet_support
1537 packet_config_support (struct packet_config
*config
)
1539 switch (config
->detect
)
1541 case AUTO_BOOLEAN_TRUE
:
1542 return PACKET_ENABLE
;
1543 case AUTO_BOOLEAN_FALSE
:
1544 return PACKET_DISABLE
;
1545 case AUTO_BOOLEAN_AUTO
:
1546 return config
->support
;
1548 gdb_assert_not_reached (_("bad switch"));
1552 /* Same as packet_config_support, but takes the packet's enum value as
1555 static enum packet_support
1556 packet_support (int packet
)
1558 struct packet_config
*config
= &remote_protocol_packets
[packet
];
1560 return packet_config_support (config
);
1564 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1565 struct cmd_list_element
*c
,
1568 struct packet_config
*packet
;
1570 for (packet
= remote_protocol_packets
;
1571 packet
< &remote_protocol_packets
[PACKET_MAX
];
1574 if (&packet
->detect
== c
->var
)
1576 show_packet_config_cmd (packet
);
1580 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1584 /* Should we try one of the 'Z' requests? */
1588 Z_PACKET_SOFTWARE_BP
,
1589 Z_PACKET_HARDWARE_BP
,
1596 /* For compatibility with older distributions. Provide a ``set remote
1597 Z-packet ...'' command that updates all the Z packet types. */
1599 static enum auto_boolean remote_Z_packet_detect
;
1602 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
1603 struct cmd_list_element
*c
)
1607 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1608 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1612 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1613 struct cmd_list_element
*c
,
1618 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1620 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1624 /* Returns true if the multi-process extensions are in effect. */
1627 remote_multi_process_p (struct remote_state
*rs
)
1629 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
1632 /* Returns true if fork events are supported. */
1635 remote_fork_event_p (struct remote_state
*rs
)
1637 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
1640 /* Returns true if vfork events are supported. */
1643 remote_vfork_event_p (struct remote_state
*rs
)
1645 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
1648 /* Returns true if exec events are supported. */
1651 remote_exec_event_p (struct remote_state
*rs
)
1653 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
1656 /* Insert fork catchpoint target routine. If fork events are enabled
1657 then return success, nothing more to do. */
1660 remote_insert_fork_catchpoint (struct target_ops
*ops
, int pid
)
1662 struct remote_state
*rs
= get_remote_state ();
1664 return !remote_fork_event_p (rs
);
1667 /* Remove fork catchpoint target routine. Nothing to do, just
1671 remote_remove_fork_catchpoint (struct target_ops
*ops
, int pid
)
1676 /* Insert vfork catchpoint target routine. If vfork events are enabled
1677 then return success, nothing more to do. */
1680 remote_insert_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1682 struct remote_state
*rs
= get_remote_state ();
1684 return !remote_vfork_event_p (rs
);
1687 /* Remove vfork catchpoint target routine. Nothing to do, just
1691 remote_remove_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1696 /* Insert exec catchpoint target routine. If exec events are
1697 enabled, just return success. */
1700 remote_insert_exec_catchpoint (struct target_ops
*ops
, int pid
)
1702 struct remote_state
*rs
= get_remote_state ();
1704 return !remote_exec_event_p (rs
);
1707 /* Remove exec catchpoint target routine. Nothing to do, just
1711 remote_remove_exec_catchpoint (struct target_ops
*ops
, int pid
)
1717 /* Asynchronous signal handle registered as event loop source for
1718 when we have pending events ready to be passed to the core. */
1720 static struct async_event_handler
*remote_async_inferior_event_token
;
1724 static ptid_t magic_null_ptid
;
1725 static ptid_t not_sent_ptid
;
1726 static ptid_t any_thread_ptid
;
1728 /* Find out if the stub attached to PID (and hence GDB should offer to
1729 detach instead of killing it when bailing out). */
1732 remote_query_attached (int pid
)
1734 struct remote_state
*rs
= get_remote_state ();
1735 size_t size
= get_remote_packet_size ();
1737 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
1740 if (remote_multi_process_p (rs
))
1741 xsnprintf (rs
->buf
, size
, "qAttached:%x", pid
);
1743 xsnprintf (rs
->buf
, size
, "qAttached");
1746 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1748 switch (packet_ok (rs
->buf
,
1749 &remote_protocol_packets
[PACKET_qAttached
]))
1752 if (strcmp (rs
->buf
, "1") == 0)
1756 warning (_("Remote failure reply: %s"), rs
->buf
);
1758 case PACKET_UNKNOWN
:
1765 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1766 has been invented by GDB, instead of reported by the target. Since
1767 we can be connected to a remote system before before knowing about
1768 any inferior, mark the target with execution when we find the first
1769 inferior. If ATTACHED is 1, then we had just attached to this
1770 inferior. If it is 0, then we just created this inferior. If it
1771 is -1, then try querying the remote stub to find out if it had
1772 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1773 attempt to open this inferior's executable as the main executable
1774 if no main executable is open already. */
1776 static struct inferior
*
1777 remote_add_inferior (int fake_pid_p
, int pid
, int attached
,
1780 struct inferior
*inf
;
1782 /* Check whether this process we're learning about is to be
1783 considered attached, or if is to be considered to have been
1784 spawned by the stub. */
1786 attached
= remote_query_attached (pid
);
1788 if (gdbarch_has_global_solist (target_gdbarch ()))
1790 /* If the target shares code across all inferiors, then every
1791 attach adds a new inferior. */
1792 inf
= add_inferior (pid
);
1794 /* ... and every inferior is bound to the same program space.
1795 However, each inferior may still have its own address
1797 inf
->aspace
= maybe_new_address_space ();
1798 inf
->pspace
= current_program_space
;
1802 /* In the traditional debugging scenario, there's a 1-1 match
1803 between program/address spaces. We simply bind the inferior
1804 to the program space's address space. */
1805 inf
= current_inferior ();
1806 inferior_appeared (inf
, pid
);
1809 inf
->attach_flag
= attached
;
1810 inf
->fake_pid_p
= fake_pid_p
;
1812 /* If no main executable is currently open then attempt to
1813 open the file that was executed to create this inferior. */
1814 if (try_open_exec
&& get_exec_file (0) == NULL
)
1815 exec_file_locate_attach (pid
, 0, 1);
1820 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
1822 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1823 according to RUNNING. */
1826 remote_add_thread (ptid_t ptid
, int running
, int executing
)
1828 struct remote_state
*rs
= get_remote_state ();
1829 struct thread_info
*thread
;
1831 /* GDB historically didn't pull threads in the initial connection
1832 setup. If the remote target doesn't even have a concept of
1833 threads (e.g., a bare-metal target), even if internally we
1834 consider that a single-threaded target, mentioning a new thread
1835 might be confusing to the user. Be silent then, preserving the
1836 age old behavior. */
1837 if (rs
->starting_up
)
1838 thread
= add_thread_silent (ptid
);
1840 thread
= add_thread (ptid
);
1842 get_remote_thread_info (thread
)->vcont_resumed
= executing
;
1843 set_executing (ptid
, executing
);
1844 set_running (ptid
, running
);
1847 /* Come here when we learn about a thread id from the remote target.
1848 It may be the first time we hear about such thread, so take the
1849 opportunity to add it to GDB's thread list. In case this is the
1850 first time we're noticing its corresponding inferior, add it to
1851 GDB's inferior list as well. EXECUTING indicates whether the
1852 thread is (internally) executing or stopped. */
1855 remote_notice_new_inferior (ptid_t currthread
, int executing
)
1857 /* In non-stop mode, we assume new found threads are (externally)
1858 running until proven otherwise with a stop reply. In all-stop,
1859 we can only get here if all threads are stopped. */
1860 int running
= target_is_non_stop_p () ? 1 : 0;
1862 /* If this is a new thread, add it to GDB's thread list.
1863 If we leave it up to WFI to do this, bad things will happen. */
1865 if (in_thread_list (currthread
) && is_exited (currthread
))
1867 /* We're seeing an event on a thread id we knew had exited.
1868 This has to be a new thread reusing the old id. Add it. */
1869 remote_add_thread (currthread
, running
, executing
);
1873 if (!in_thread_list (currthread
))
1875 struct inferior
*inf
= NULL
;
1876 int pid
= ptid_get_pid (currthread
);
1878 if (ptid_is_pid (inferior_ptid
)
1879 && pid
== ptid_get_pid (inferior_ptid
))
1881 /* inferior_ptid has no thread member yet. This can happen
1882 with the vAttach -> remote_wait,"TAAthread:" path if the
1883 stub doesn't support qC. This is the first stop reported
1884 after an attach, so this is the main thread. Update the
1885 ptid in the thread list. */
1886 if (in_thread_list (pid_to_ptid (pid
)))
1887 thread_change_ptid (inferior_ptid
, currthread
);
1890 remote_add_thread (currthread
, running
, executing
);
1891 inferior_ptid
= currthread
;
1896 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1898 /* inferior_ptid is not set yet. This can happen with the
1899 vRun -> remote_wait,"TAAthread:" path if the stub
1900 doesn't support qC. This is the first stop reported
1901 after an attach, so this is the main thread. Update the
1902 ptid in the thread list. */
1903 thread_change_ptid (inferior_ptid
, currthread
);
1907 /* When connecting to a target remote, or to a target
1908 extended-remote which already was debugging an inferior, we
1909 may not know about it yet. Add it before adding its child
1910 thread, so notifications are emitted in a sensible order. */
1911 if (!in_inferior_list (ptid_get_pid (currthread
)))
1913 struct remote_state
*rs
= get_remote_state ();
1914 int fake_pid_p
= !remote_multi_process_p (rs
);
1916 inf
= remote_add_inferior (fake_pid_p
,
1917 ptid_get_pid (currthread
), -1, 1);
1920 /* This is really a new thread. Add it. */
1921 remote_add_thread (currthread
, running
, executing
);
1923 /* If we found a new inferior, let the common code do whatever
1924 it needs to with it (e.g., read shared libraries, insert
1925 breakpoints), unless we're just setting up an all-stop
1929 struct remote_state
*rs
= get_remote_state ();
1931 if (!rs
->starting_up
)
1932 notice_new_inferior (currthread
, executing
, 0);
1937 /* Return THREAD's private thread data, creating it if necessary. */
1939 static remote_thread_info
*
1940 get_remote_thread_info (thread_info
*thread
)
1942 gdb_assert (thread
!= NULL
);
1944 if (thread
->priv
== NULL
)
1945 thread
->priv
.reset (new remote_thread_info
);
1947 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
1950 /* Return PTID's private thread data, creating it if necessary. */
1952 static remote_thread_info
*
1953 get_remote_thread_info (ptid_t ptid
)
1955 struct thread_info
*info
= find_thread_ptid (ptid
);
1957 return get_remote_thread_info (info
);
1960 /* Call this function as a result of
1961 1) A halt indication (T packet) containing a thread id
1962 2) A direct query of currthread
1963 3) Successful execution of set thread */
1966 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
1968 rs
->general_thread
= currthread
;
1971 /* If 'QPassSignals' is supported, tell the remote stub what signals
1972 it can simply pass through to the inferior without reporting. */
1975 remote_pass_signals (struct target_ops
*self
,
1976 int numsigs
, unsigned char *pass_signals
)
1978 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
1980 char *pass_packet
, *p
;
1982 struct remote_state
*rs
= get_remote_state ();
1984 gdb_assert (numsigs
< 256);
1985 for (i
= 0; i
< numsigs
; i
++)
1987 if (pass_signals
[i
])
1990 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1991 strcpy (pass_packet
, "QPassSignals:");
1992 p
= pass_packet
+ strlen (pass_packet
);
1993 for (i
= 0; i
< numsigs
; i
++)
1995 if (pass_signals
[i
])
1998 *p
++ = tohex (i
>> 4);
1999 *p
++ = tohex (i
& 15);
2008 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2010 putpkt (pass_packet
);
2011 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2012 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2013 if (rs
->last_pass_packet
)
2014 xfree (rs
->last_pass_packet
);
2015 rs
->last_pass_packet
= pass_packet
;
2018 xfree (pass_packet
);
2022 /* If 'QCatchSyscalls' is supported, tell the remote stub
2023 to report syscalls to GDB. */
2026 remote_set_syscall_catchpoint (struct target_ops
*self
,
2027 int pid
, bool needed
, int any_count
,
2028 gdb::array_view
<const int> syscall_counts
)
2030 const char *catch_packet
;
2031 enum packet_result result
;
2034 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2036 /* Not supported. */
2040 if (needed
&& any_count
== 0)
2042 /* Count how many syscalls are to be caught. */
2043 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2045 if (syscall_counts
[i
] != 0)
2052 fprintf_unfiltered (gdb_stdlog
,
2053 "remote_set_syscall_catchpoint "
2054 "pid %d needed %d any_count %d n_sysno %d\n",
2055 pid
, needed
, any_count
, n_sysno
);
2058 std::string built_packet
;
2061 /* Prepare a packet with the sysno list, assuming max 8+1
2062 characters for a sysno. If the resulting packet size is too
2063 big, fallback on the non-selective packet. */
2064 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2065 built_packet
.reserve (maxpktsz
);
2066 built_packet
= "QCatchSyscalls:1";
2069 /* Add in each syscall to be caught. */
2070 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2072 if (syscall_counts
[i
] != 0)
2073 string_appendf (built_packet
, ";%zx", i
);
2076 if (built_packet
.size () > get_remote_packet_size ())
2078 /* catch_packet too big. Fallback to less efficient
2079 non selective mode, with GDB doing the filtering. */
2080 catch_packet
= "QCatchSyscalls:1";
2083 catch_packet
= built_packet
.c_str ();
2086 catch_packet
= "QCatchSyscalls:0";
2088 struct remote_state
*rs
= get_remote_state ();
2090 putpkt (catch_packet
);
2091 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2092 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2093 if (result
== PACKET_OK
)
2099 /* If 'QProgramSignals' is supported, tell the remote stub what
2100 signals it should pass through to the inferior when detaching. */
2103 remote_program_signals (struct target_ops
*self
,
2104 int numsigs
, unsigned char *signals
)
2106 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2110 struct remote_state
*rs
= get_remote_state ();
2112 gdb_assert (numsigs
< 256);
2113 for (i
= 0; i
< numsigs
; i
++)
2118 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2119 strcpy (packet
, "QProgramSignals:");
2120 p
= packet
+ strlen (packet
);
2121 for (i
= 0; i
< numsigs
; i
++)
2123 if (signal_pass_state (i
))
2126 *p
++ = tohex (i
>> 4);
2127 *p
++ = tohex (i
& 15);
2136 if (!rs
->last_program_signals_packet
2137 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2140 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2141 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2142 xfree (rs
->last_program_signals_packet
);
2143 rs
->last_program_signals_packet
= packet
;
2150 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2151 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2152 thread. If GEN is set, set the general thread, if not, then set
2153 the step/continue thread. */
2155 set_thread (ptid_t ptid
, int gen
)
2157 struct remote_state
*rs
= get_remote_state ();
2158 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2159 char *buf
= rs
->buf
;
2160 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
2162 if (ptid_equal (state
, ptid
))
2166 *buf
++ = gen
? 'g' : 'c';
2167 if (ptid_equal (ptid
, magic_null_ptid
))
2168 xsnprintf (buf
, endbuf
- buf
, "0");
2169 else if (ptid_equal (ptid
, any_thread_ptid
))
2170 xsnprintf (buf
, endbuf
- buf
, "0");
2171 else if (ptid_equal (ptid
, minus_one_ptid
))
2172 xsnprintf (buf
, endbuf
- buf
, "-1");
2174 write_ptid (buf
, endbuf
, ptid
);
2176 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2178 rs
->general_thread
= ptid
;
2180 rs
->continue_thread
= ptid
;
2184 set_general_thread (ptid_t ptid
)
2186 set_thread (ptid
, 1);
2190 set_continue_thread (ptid_t ptid
)
2192 set_thread (ptid
, 0);
2195 /* Change the remote current process. Which thread within the process
2196 ends up selected isn't important, as long as it is the same process
2197 as what INFERIOR_PTID points to.
2199 This comes from that fact that there is no explicit notion of
2200 "selected process" in the protocol. The selected process for
2201 general operations is the process the selected general thread
2205 set_general_process (void)
2207 struct remote_state
*rs
= get_remote_state ();
2209 /* If the remote can't handle multiple processes, don't bother. */
2210 if (!remote_multi_process_p (rs
))
2213 /* We only need to change the remote current thread if it's pointing
2214 at some other process. */
2215 if (ptid_get_pid (rs
->general_thread
) != ptid_get_pid (inferior_ptid
))
2216 set_general_thread (inferior_ptid
);
2220 /* Return nonzero if this is the main thread that we made up ourselves
2221 to model non-threaded targets as single-threaded. */
2224 remote_thread_always_alive (struct target_ops
*ops
, ptid_t ptid
)
2226 if (ptid_equal (ptid
, magic_null_ptid
))
2227 /* The main thread is always alive. */
2230 if (ptid_get_pid (ptid
) != 0 && ptid_get_lwp (ptid
) == 0)
2231 /* The main thread is always alive. This can happen after a
2232 vAttach, if the remote side doesn't support
2239 /* Return nonzero if the thread PTID is still alive on the remote
2243 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2245 struct remote_state
*rs
= get_remote_state ();
2248 /* Check if this is a thread that we made up ourselves to model
2249 non-threaded targets as single-threaded. */
2250 if (remote_thread_always_alive (ops
, ptid
))
2254 endp
= rs
->buf
+ get_remote_packet_size ();
2257 write_ptid (p
, endp
, ptid
);
2260 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2261 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2264 /* Return a pointer to a thread name if we know it and NULL otherwise.
2265 The thread_info object owns the memory for the name. */
2268 remote_thread_name (struct target_ops
*ops
, struct thread_info
*info
)
2270 if (info
->priv
!= NULL
)
2272 const std::string
&name
= get_remote_thread_info (info
)->name
;
2273 return !name
.empty () ? name
.c_str () : NULL
;
2279 /* About these extended threadlist and threadinfo packets. They are
2280 variable length packets but, the fields within them are often fixed
2281 length. They are redundent enough to send over UDP as is the
2282 remote protocol in general. There is a matching unit test module
2285 /* WARNING: This threadref data structure comes from the remote O.S.,
2286 libstub protocol encoding, and remote.c. It is not particularly
2289 /* Right now, the internal structure is int. We want it to be bigger.
2290 Plan to fix this. */
2292 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2294 /* gdb_ext_thread_info is an internal GDB data structure which is
2295 equivalent to the reply of the remote threadinfo packet. */
2297 struct gdb_ext_thread_info
2299 threadref threadid
; /* External form of thread reference. */
2300 int active
; /* Has state interesting to GDB?
2302 char display
[256]; /* Brief state display, name,
2303 blocked/suspended. */
2304 char shortname
[32]; /* To be used to name threads. */
2305 char more_display
[256]; /* Long info, statistics, queue depth,
2309 /* The volume of remote transfers can be limited by submitting
2310 a mask containing bits specifying the desired information.
2311 Use a union of these values as the 'selection' parameter to
2312 get_thread_info. FIXME: Make these TAG names more thread specific. */
2314 #define TAG_THREADID 1
2315 #define TAG_EXISTS 2
2316 #define TAG_DISPLAY 4
2317 #define TAG_THREADNAME 8
2318 #define TAG_MOREDISPLAY 16
2320 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2322 static char *unpack_nibble (char *buf
, int *val
);
2324 static char *unpack_byte (char *buf
, int *value
);
2326 static char *pack_int (char *buf
, int value
);
2328 static char *unpack_int (char *buf
, int *value
);
2330 static char *unpack_string (char *src
, char *dest
, int length
);
2332 static char *pack_threadid (char *pkt
, threadref
*id
);
2334 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2336 void int_to_threadref (threadref
*id
, int value
);
2338 static int threadref_to_int (threadref
*ref
);
2340 static void copy_threadref (threadref
*dest
, threadref
*src
);
2342 static int threadmatch (threadref
*dest
, threadref
*src
);
2344 static char *pack_threadinfo_request (char *pkt
, int mode
,
2347 static int remote_unpack_thread_info_response (char *pkt
,
2348 threadref
*expectedref
,
2349 struct gdb_ext_thread_info
2353 static int remote_get_threadinfo (threadref
*threadid
,
2354 int fieldset
, /*TAG mask */
2355 struct gdb_ext_thread_info
*info
);
2357 static char *pack_threadlist_request (char *pkt
, int startflag
,
2359 threadref
*nextthread
);
2361 static int parse_threadlist_response (char *pkt
,
2363 threadref
*original_echo
,
2364 threadref
*resultlist
,
2367 static int remote_get_threadlist (int startflag
,
2368 threadref
*nextthread
,
2372 threadref
*threadlist
);
2374 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
2376 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
2377 void *context
, int looplimit
);
2379 static int remote_newthread_step (threadref
*ref
, void *context
);
2382 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2383 buffer we're allowed to write to. Returns
2384 BUF+CHARACTERS_WRITTEN. */
2387 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2390 struct remote_state
*rs
= get_remote_state ();
2392 if (remote_multi_process_p (rs
))
2394 pid
= ptid_get_pid (ptid
);
2396 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2398 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2400 tid
= ptid_get_lwp (ptid
);
2402 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2404 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2409 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2410 last parsed char. Returns null_ptid if no thread id is found, and
2411 throws an error if the thread id has an invalid format. */
2414 read_ptid (const char *buf
, const char **obuf
)
2416 const char *p
= buf
;
2418 ULONGEST pid
= 0, tid
= 0;
2422 /* Multi-process ptid. */
2423 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2425 error (_("invalid remote ptid: %s"), p
);
2428 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2431 return ptid_build (pid
, tid
, 0);
2434 /* No multi-process. Just a tid. */
2435 pp
= unpack_varlen_hex (p
, &tid
);
2437 /* Return null_ptid when no thread id is found. */
2445 /* Since the stub is not sending a process id, then default to
2446 what's in inferior_ptid, unless it's null at this point. If so,
2447 then since there's no way to know the pid of the reported
2448 threads, use the magic number. */
2449 if (ptid_equal (inferior_ptid
, null_ptid
))
2450 pid
= ptid_get_pid (magic_null_ptid
);
2452 pid
= ptid_get_pid (inferior_ptid
);
2456 return ptid_build (pid
, tid
, 0);
2462 if (ch
>= 'a' && ch
<= 'f')
2463 return ch
- 'a' + 10;
2464 if (ch
>= '0' && ch
<= '9')
2466 if (ch
>= 'A' && ch
<= 'F')
2467 return ch
- 'A' + 10;
2472 stub_unpack_int (char *buff
, int fieldlength
)
2479 nibble
= stubhex (*buff
++);
2483 retval
= retval
<< 4;
2489 unpack_nibble (char *buf
, int *val
)
2491 *val
= fromhex (*buf
++);
2496 unpack_byte (char *buf
, int *value
)
2498 *value
= stub_unpack_int (buf
, 2);
2503 pack_int (char *buf
, int value
)
2505 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2506 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2507 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2508 buf
= pack_hex_byte (buf
, (value
& 0xff));
2513 unpack_int (char *buf
, int *value
)
2515 *value
= stub_unpack_int (buf
, 8);
2519 #if 0 /* Currently unused, uncomment when needed. */
2520 static char *pack_string (char *pkt
, char *string
);
2523 pack_string (char *pkt
, char *string
)
2528 len
= strlen (string
);
2530 len
= 200; /* Bigger than most GDB packets, junk??? */
2531 pkt
= pack_hex_byte (pkt
, len
);
2535 if ((ch
== '\0') || (ch
== '#'))
2536 ch
= '*'; /* Protect encapsulation. */
2541 #endif /* 0 (unused) */
2544 unpack_string (char *src
, char *dest
, int length
)
2553 pack_threadid (char *pkt
, threadref
*id
)
2556 unsigned char *altid
;
2558 altid
= (unsigned char *) id
;
2559 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2561 pkt
= pack_hex_byte (pkt
, *altid
++);
2567 unpack_threadid (char *inbuf
, threadref
*id
)
2570 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2573 altref
= (char *) id
;
2575 while (inbuf
< limit
)
2577 x
= stubhex (*inbuf
++);
2578 y
= stubhex (*inbuf
++);
2579 *altref
++ = (x
<< 4) | y
;
2584 /* Externally, threadrefs are 64 bits but internally, they are still
2585 ints. This is due to a mismatch of specifications. We would like
2586 to use 64bit thread references internally. This is an adapter
2590 int_to_threadref (threadref
*id
, int value
)
2592 unsigned char *scan
;
2594 scan
= (unsigned char *) id
;
2600 *scan
++ = (value
>> 24) & 0xff;
2601 *scan
++ = (value
>> 16) & 0xff;
2602 *scan
++ = (value
>> 8) & 0xff;
2603 *scan
++ = (value
& 0xff);
2607 threadref_to_int (threadref
*ref
)
2610 unsigned char *scan
;
2616 value
= (value
<< 8) | ((*scan
++) & 0xff);
2621 copy_threadref (threadref
*dest
, threadref
*src
)
2624 unsigned char *csrc
, *cdest
;
2626 csrc
= (unsigned char *) src
;
2627 cdest
= (unsigned char *) dest
;
2634 threadmatch (threadref
*dest
, threadref
*src
)
2636 /* Things are broken right now, so just assume we got a match. */
2638 unsigned char *srcp
, *destp
;
2640 srcp
= (char *) src
;
2641 destp
= (char *) dest
;
2645 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2652 threadid:1, # always request threadid
2659 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2662 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2664 *pkt
++ = 'q'; /* Info Query */
2665 *pkt
++ = 'P'; /* process or thread info */
2666 pkt
= pack_int (pkt
, mode
); /* mode */
2667 pkt
= pack_threadid (pkt
, id
); /* threadid */
2668 *pkt
= '\0'; /* terminate */
2672 /* These values tag the fields in a thread info response packet. */
2673 /* Tagging the fields allows us to request specific fields and to
2674 add more fields as time goes by. */
2676 #define TAG_THREADID 1 /* Echo the thread identifier. */
2677 #define TAG_EXISTS 2 /* Is this process defined enough to
2678 fetch registers and its stack? */
2679 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2680 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2681 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2685 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2686 struct gdb_ext_thread_info
*info
)
2688 struct remote_state
*rs
= get_remote_state ();
2692 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2695 /* info->threadid = 0; FIXME: implement zero_threadref. */
2697 info
->display
[0] = '\0';
2698 info
->shortname
[0] = '\0';
2699 info
->more_display
[0] = '\0';
2701 /* Assume the characters indicating the packet type have been
2703 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2704 pkt
= unpack_threadid (pkt
, &ref
);
2707 warning (_("Incomplete response to threadinfo request."));
2708 if (!threadmatch (&ref
, expectedref
))
2709 { /* This is an answer to a different request. */
2710 warning (_("ERROR RMT Thread info mismatch."));
2713 copy_threadref (&info
->threadid
, &ref
);
2715 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2717 /* Packets are terminated with nulls. */
2718 while ((pkt
< limit
) && mask
&& *pkt
)
2720 pkt
= unpack_int (pkt
, &tag
); /* tag */
2721 pkt
= unpack_byte (pkt
, &length
); /* length */
2722 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2724 warning (_("ERROR RMT: threadinfo tag mismatch."));
2728 if (tag
== TAG_THREADID
)
2732 warning (_("ERROR RMT: length of threadid is not 16."));
2736 pkt
= unpack_threadid (pkt
, &ref
);
2737 mask
= mask
& ~TAG_THREADID
;
2740 if (tag
== TAG_EXISTS
)
2742 info
->active
= stub_unpack_int (pkt
, length
);
2744 mask
= mask
& ~(TAG_EXISTS
);
2747 warning (_("ERROR RMT: 'exists' length too long."));
2753 if (tag
== TAG_THREADNAME
)
2755 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2756 mask
= mask
& ~TAG_THREADNAME
;
2759 if (tag
== TAG_DISPLAY
)
2761 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2762 mask
= mask
& ~TAG_DISPLAY
;
2765 if (tag
== TAG_MOREDISPLAY
)
2767 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2768 mask
= mask
& ~TAG_MOREDISPLAY
;
2771 warning (_("ERROR RMT: unknown thread info tag."));
2772 break; /* Not a tag we know about. */
2778 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2779 struct gdb_ext_thread_info
*info
)
2781 struct remote_state
*rs
= get_remote_state ();
2784 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2786 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2788 if (rs
->buf
[0] == '\0')
2791 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2796 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2799 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2800 threadref
*nextthread
)
2802 *pkt
++ = 'q'; /* info query packet */
2803 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2804 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2805 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2806 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2811 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2814 parse_threadlist_response (char *pkt
, int result_limit
,
2815 threadref
*original_echo
, threadref
*resultlist
,
2818 struct remote_state
*rs
= get_remote_state ();
2820 int count
, resultcount
, done
;
2823 /* Assume the 'q' and 'M chars have been stripped. */
2824 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2825 /* done parse past here */
2826 pkt
= unpack_byte (pkt
, &count
); /* count field */
2827 pkt
= unpack_nibble (pkt
, &done
);
2828 /* The first threadid is the argument threadid. */
2829 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2830 while ((count
-- > 0) && (pkt
< limit
))
2832 pkt
= unpack_threadid (pkt
, resultlist
++);
2833 if (resultcount
++ >= result_limit
)
2841 /* Fetch the next batch of threads from the remote. Returns -1 if the
2842 qL packet is not supported, 0 on error and 1 on success. */
2845 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2846 int *done
, int *result_count
, threadref
*threadlist
)
2848 struct remote_state
*rs
= get_remote_state ();
2851 /* Trancate result limit to be smaller than the packet size. */
2852 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2853 >= get_remote_packet_size ())
2854 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2856 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2858 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2859 if (*rs
->buf
== '\0')
2861 /* Packet not supported. */
2866 parse_threadlist_response (rs
->buf
+ 2, result_limit
,
2867 &rs
->echo_nextthread
, threadlist
, done
);
2869 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
2871 /* FIXME: This is a good reason to drop the packet. */
2872 /* Possably, there is a duplicate response. */
2874 retransmit immediatly - race conditions
2875 retransmit after timeout - yes
2877 wait for packet, then exit
2879 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2880 return 0; /* I choose simply exiting. */
2882 if (*result_count
<= 0)
2886 warning (_("RMT ERROR : failed to get remote thread list."));
2889 return result
; /* break; */
2891 if (*result_count
> result_limit
)
2894 warning (_("RMT ERROR: threadlist response longer than requested."));
2900 /* Fetch the list of remote threads, with the qL packet, and call
2901 STEPFUNCTION for each thread found. Stops iterating and returns 1
2902 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2903 STEPFUNCTION returns false. If the packet is not supported,
2907 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2910 struct remote_state
*rs
= get_remote_state ();
2911 int done
, i
, result_count
;
2919 if (loopcount
++ > looplimit
)
2922 warning (_("Remote fetch threadlist -infinite loop-."));
2925 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
2926 MAXTHREADLISTRESULTS
,
2927 &done
, &result_count
,
2928 rs
->resultthreadlist
);
2931 /* Clear for later iterations. */
2933 /* Setup to resume next batch of thread references, set nextthread. */
2934 if (result_count
>= 1)
2935 copy_threadref (&rs
->nextthread
,
2936 &rs
->resultthreadlist
[result_count
- 1]);
2938 while (result_count
--)
2940 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
2950 /* A thread found on the remote target. */
2954 explicit thread_item (ptid_t ptid_
)
2958 thread_item (thread_item
&&other
) = default;
2959 thread_item
&operator= (thread_item
&&other
) = default;
2961 DISABLE_COPY_AND_ASSIGN (thread_item
);
2963 /* The thread's PTID. */
2966 /* The thread's extra info. */
2969 /* The thread's name. */
2972 /* The core the thread was running on. -1 if not known. */
2975 /* The thread handle associated with the thread. */
2976 gdb::byte_vector thread_handle
;
2979 /* Context passed around to the various methods listing remote
2980 threads. As new threads are found, they're added to the ITEMS
2983 struct threads_listing_context
2985 /* Return true if this object contains an entry for a thread with ptid
2988 bool contains_thread (ptid_t ptid
) const
2990 auto match_ptid
= [&] (const thread_item
&item
)
2992 return item
.ptid
== ptid
;
2995 auto it
= std::find_if (this->items
.begin (),
2999 return it
!= this->items
.end ();
3002 /* Remove the thread with ptid PTID. */
3004 void remove_thread (ptid_t ptid
)
3006 auto match_ptid
= [&] (const thread_item
&item
)
3008 return item
.ptid
== ptid
;
3011 auto it
= std::remove_if (this->items
.begin (),
3015 if (it
!= this->items
.end ())
3016 this->items
.erase (it
);
3019 /* The threads found on the remote target. */
3020 std::vector
<thread_item
> items
;
3024 remote_newthread_step (threadref
*ref
, void *data
)
3026 struct threads_listing_context
*context
3027 = (struct threads_listing_context
*) data
;
3028 int pid
= inferior_ptid
.pid ();
3029 int lwp
= threadref_to_int (ref
);
3030 ptid_t
ptid (pid
, lwp
);
3032 context
->items
.emplace_back (ptid
);
3034 return 1; /* continue iterator */
3037 #define CRAZY_MAX_THREADS 1000
3040 remote_current_thread (ptid_t oldpid
)
3042 struct remote_state
*rs
= get_remote_state ();
3045 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3046 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3051 result
= read_ptid (&rs
->buf
[2], &obuf
);
3052 if (*obuf
!= '\0' && remote_debug
)
3053 fprintf_unfiltered (gdb_stdlog
,
3054 "warning: garbage in qC reply\n");
3062 /* List remote threads using the deprecated qL packet. */
3065 remote_get_threads_with_ql (struct target_ops
*ops
,
3066 struct threads_listing_context
*context
)
3068 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3069 CRAZY_MAX_THREADS
) >= 0)
3075 #if defined(HAVE_LIBEXPAT)
3078 start_thread (struct gdb_xml_parser
*parser
,
3079 const struct gdb_xml_element
*element
,
3081 std::vector
<gdb_xml_value
> &attributes
)
3083 struct threads_listing_context
*data
3084 = (struct threads_listing_context
*) user_data
;
3085 struct gdb_xml_value
*attr
;
3087 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3088 ptid_t ptid
= read_ptid (id
, NULL
);
3090 data
->items
.emplace_back (ptid
);
3091 thread_item
&item
= data
->items
.back ();
3093 attr
= xml_find_attribute (attributes
, "core");
3095 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3097 attr
= xml_find_attribute (attributes
, "name");
3099 item
.name
= (const char *) attr
->value
.get ();
3101 attr
= xml_find_attribute (attributes
, "handle");
3103 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3107 end_thread (struct gdb_xml_parser
*parser
,
3108 const struct gdb_xml_element
*element
,
3109 void *user_data
, const char *body_text
)
3111 struct threads_listing_context
*data
3112 = (struct threads_listing_context
*) user_data
;
3114 if (body_text
!= NULL
&& *body_text
!= '\0')
3115 data
->items
.back ().extra
= body_text
;
3118 const struct gdb_xml_attribute thread_attributes
[] = {
3119 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3120 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3121 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3122 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3123 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3126 const struct gdb_xml_element thread_children
[] = {
3127 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3130 const struct gdb_xml_element threads_children
[] = {
3131 { "thread", thread_attributes
, thread_children
,
3132 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3133 start_thread
, end_thread
},
3134 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3137 const struct gdb_xml_element threads_elements
[] = {
3138 { "threads", NULL
, threads_children
,
3139 GDB_XML_EF_NONE
, NULL
, NULL
},
3140 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3145 /* List remote threads using qXfer:threads:read. */
3148 remote_get_threads_with_qxfer (struct target_ops
*ops
,
3149 struct threads_listing_context
*context
)
3151 #if defined(HAVE_LIBEXPAT)
3152 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3154 gdb::optional
<gdb::char_vector
> xml
3155 = target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3157 if (xml
&& (*xml
)[0] != '\0')
3159 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3160 threads_elements
, xml
->data (), context
);
3170 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3173 remote_get_threads_with_qthreadinfo (struct target_ops
*ops
,
3174 struct threads_listing_context
*context
)
3176 struct remote_state
*rs
= get_remote_state ();
3178 if (rs
->use_threadinfo_query
)
3182 putpkt ("qfThreadInfo");
3183 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3185 if (bufp
[0] != '\0') /* q packet recognized */
3187 while (*bufp
++ == 'm') /* reply contains one or more TID */
3191 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3192 context
->items
.emplace_back (ptid
);
3194 while (*bufp
++ == ','); /* comma-separated list */
3195 putpkt ("qsThreadInfo");
3196 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3203 /* Packet not recognized. */
3204 rs
->use_threadinfo_query
= 0;
3211 /* Implement the to_update_thread_list function for the remote
3215 remote_update_thread_list (struct target_ops
*ops
)
3217 struct threads_listing_context context
;
3220 /* We have a few different mechanisms to fetch the thread list. Try
3221 them all, starting with the most preferred one first, falling
3222 back to older methods. */
3223 if (remote_get_threads_with_qxfer (ops
, &context
)
3224 || remote_get_threads_with_qthreadinfo (ops
, &context
)
3225 || remote_get_threads_with_ql (ops
, &context
))
3227 struct thread_info
*tp
, *tmp
;
3231 if (context
.items
.empty ()
3232 && remote_thread_always_alive (ops
, inferior_ptid
))
3234 /* Some targets don't really support threads, but still
3235 reply an (empty) thread list in response to the thread
3236 listing packets, instead of replying "packet not
3237 supported". Exit early so we don't delete the main
3242 /* CONTEXT now holds the current thread list on the remote
3243 target end. Delete GDB-side threads no longer found on the
3245 ALL_THREADS_SAFE (tp
, tmp
)
3247 if (!context
.contains_thread (tp
->ptid
))
3250 delete_thread (tp
->ptid
);
3254 /* Remove any unreported fork child threads from CONTEXT so
3255 that we don't interfere with follow fork, which is where
3256 creation of such threads is handled. */
3257 remove_new_fork_children (&context
);
3259 /* And now add threads we don't know about yet to our list. */
3260 for (thread_item
&item
: context
.items
)
3262 if (item
.ptid
!= null_ptid
)
3264 /* In non-stop mode, we assume new found threads are
3265 executing until proven otherwise with a stop reply.
3266 In all-stop, we can only get here if all threads are
3268 int executing
= target_is_non_stop_p () ? 1 : 0;
3270 remote_notice_new_inferior (item
.ptid
, executing
);
3272 remote_thread_info
*info
= get_remote_thread_info (item
.ptid
);
3273 info
->core
= item
.core
;
3274 info
->extra
= std::move (item
.extra
);
3275 info
->name
= std::move (item
.name
);
3276 info
->thread_handle
= std::move (item
.thread_handle
);
3283 /* If no thread listing method is supported, then query whether
3284 each known thread is alive, one by one, with the T packet.
3285 If the target doesn't support threads at all, then this is a
3286 no-op. See remote_thread_alive. */
3292 * Collect a descriptive string about the given thread.
3293 * The target may say anything it wants to about the thread
3294 * (typically info about its blocked / runnable state, name, etc.).
3295 * This string will appear in the info threads display.
3297 * Optional: targets are not required to implement this function.
3301 remote_threads_extra_info (struct target_ops
*self
, struct thread_info
*tp
)
3303 struct remote_state
*rs
= get_remote_state ();
3307 struct gdb_ext_thread_info threadinfo
;
3308 static char display_buf
[100]; /* arbitrary... */
3309 int n
= 0; /* position in display_buf */
3311 if (rs
->remote_desc
== 0) /* paranoia */
3312 internal_error (__FILE__
, __LINE__
,
3313 _("remote_threads_extra_info"));
3315 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
3316 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_lwp (tp
->ptid
) == 0))
3317 /* This is the main thread which was added by GDB. The remote
3318 server doesn't know about it. */
3321 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3323 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
3325 if (info
!= NULL
&& info
->priv
!= NULL
)
3327 const std::string
&extra
= get_remote_thread_info (info
)->extra
;
3328 return !extra
.empty () ? extra
.c_str () : NULL
;
3334 if (rs
->use_threadextra_query
)
3337 char *endb
= rs
->buf
+ get_remote_packet_size ();
3339 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3341 write_ptid (b
, endb
, tp
->ptid
);
3344 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3345 if (rs
->buf
[0] != 0)
3347 n
= std::min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
3348 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
3349 display_buf
[result
] = '\0';
3354 /* If the above query fails, fall back to the old method. */
3355 rs
->use_threadextra_query
= 0;
3356 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3357 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3358 int_to_threadref (&id
, ptid_get_lwp (tp
->ptid
));
3359 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3360 if (threadinfo
.active
)
3362 if (*threadinfo
.shortname
)
3363 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
3364 " Name: %s,", threadinfo
.shortname
);
3365 if (*threadinfo
.display
)
3366 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3367 " State: %s,", threadinfo
.display
);
3368 if (*threadinfo
.more_display
)
3369 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3370 " Priority: %s", threadinfo
.more_display
);
3374 /* For purely cosmetic reasons, clear up trailing commas. */
3375 if (',' == display_buf
[n
-1])
3376 display_buf
[n
-1] = ' ';
3385 remote_static_tracepoint_marker_at (struct target_ops
*self
, CORE_ADDR addr
,
3386 struct static_tracepoint_marker
*marker
)
3388 struct remote_state
*rs
= get_remote_state ();
3391 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3393 p
+= hexnumstr (p
, addr
);
3395 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3399 error (_("Remote failure reply: %s"), p
);
3403 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
3410 static std::vector
<static_tracepoint_marker
>
3411 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3414 struct remote_state
*rs
= get_remote_state ();
3415 std::vector
<static_tracepoint_marker
> markers
;
3417 static_tracepoint_marker marker
;
3419 /* Ask for a first packet of static tracepoint marker
3422 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3425 error (_("Remote failure reply: %s"), p
);
3431 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
3433 if (strid
== NULL
|| marker
.str_id
== strid
)
3434 markers
.push_back (std::move (marker
));
3436 while (*p
++ == ','); /* comma-separated list */
3437 /* Ask for another packet of static tracepoint definition. */
3439 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3447 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3450 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3452 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3456 /* Restart the remote side; this is an extended protocol operation. */
3459 extended_remote_restart (void)
3461 struct remote_state
*rs
= get_remote_state ();
3463 /* Send the restart command; for reasons I don't understand the
3464 remote side really expects a number after the "R". */
3465 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3468 remote_fileio_reset ();
3471 /* Clean up connection to a remote debugger. */
3474 remote_close (struct target_ops
*self
)
3476 struct remote_state
*rs
= get_remote_state ();
3478 if (rs
->remote_desc
== NULL
)
3479 return; /* already closed */
3481 /* Make sure we leave stdin registered in the event loop. */
3482 remote_terminal_ours (self
);
3484 serial_close (rs
->remote_desc
);
3485 rs
->remote_desc
= NULL
;
3487 /* We don't have a connection to the remote stub anymore. Get rid
3488 of all the inferiors and their threads we were controlling.
3489 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3490 will be unable to find the thread corresponding to (pid, 0, 0). */
3491 inferior_ptid
= null_ptid
;
3492 discard_all_inferiors ();
3494 /* We are closing the remote target, so we should discard
3495 everything of this target. */
3496 discard_pending_stop_replies_in_queue (rs
);
3498 if (remote_async_inferior_event_token
)
3499 delete_async_event_handler (&remote_async_inferior_event_token
);
3501 remote_notif_state_xfree (rs
->notif_state
);
3503 trace_reset_local_state ();
3506 /* Query the remote side for the text, data and bss offsets. */
3511 struct remote_state
*rs
= get_remote_state ();
3514 int lose
, num_segments
= 0, do_sections
, do_segments
;
3515 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3516 struct section_offsets
*offs
;
3517 struct symfile_segment_data
*data
;
3519 if (symfile_objfile
== NULL
)
3522 putpkt ("qOffsets");
3523 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3526 if (buf
[0] == '\000')
3527 return; /* Return silently. Stub doesn't support
3531 warning (_("Remote failure reply: %s"), buf
);
3535 /* Pick up each field in turn. This used to be done with scanf, but
3536 scanf will make trouble if CORE_ADDR size doesn't match
3537 conversion directives correctly. The following code will work
3538 with any size of CORE_ADDR. */
3539 text_addr
= data_addr
= bss_addr
= 0;
3543 if (startswith (ptr
, "Text="))
3546 /* Don't use strtol, could lose on big values. */
3547 while (*ptr
&& *ptr
!= ';')
3548 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3550 if (startswith (ptr
, ";Data="))
3553 while (*ptr
&& *ptr
!= ';')
3554 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3559 if (!lose
&& startswith (ptr
, ";Bss="))
3562 while (*ptr
&& *ptr
!= ';')
3563 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3565 if (bss_addr
!= data_addr
)
3566 warning (_("Target reported unsupported offsets: %s"), buf
);
3571 else if (startswith (ptr
, "TextSeg="))
3574 /* Don't use strtol, could lose on big values. */
3575 while (*ptr
&& *ptr
!= ';')
3576 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3579 if (startswith (ptr
, ";DataSeg="))
3582 while (*ptr
&& *ptr
!= ';')
3583 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3591 error (_("Malformed response to offset query, %s"), buf
);
3592 else if (*ptr
!= '\0')
3593 warning (_("Target reported unsupported offsets: %s"), buf
);
3595 offs
= ((struct section_offsets
*)
3596 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3597 memcpy (offs
, symfile_objfile
->section_offsets
,
3598 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3600 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3601 do_segments
= (data
!= NULL
);
3602 do_sections
= num_segments
== 0;
3604 if (num_segments
> 0)
3606 segments
[0] = text_addr
;
3607 segments
[1] = data_addr
;
3609 /* If we have two segments, we can still try to relocate everything
3610 by assuming that the .text and .data offsets apply to the whole
3611 text and data segments. Convert the offsets given in the packet
3612 to base addresses for symfile_map_offsets_to_segments. */
3613 else if (data
&& data
->num_segments
== 2)
3615 segments
[0] = data
->segment_bases
[0] + text_addr
;
3616 segments
[1] = data
->segment_bases
[1] + data_addr
;
3619 /* If the object file has only one segment, assume that it is text
3620 rather than data; main programs with no writable data are rare,
3621 but programs with no code are useless. Of course the code might
3622 have ended up in the data segment... to detect that we would need
3623 the permissions here. */
3624 else if (data
&& data
->num_segments
== 1)
3626 segments
[0] = data
->segment_bases
[0] + text_addr
;
3629 /* There's no way to relocate by segment. */
3635 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3636 offs
, num_segments
, segments
);
3638 if (ret
== 0 && !do_sections
)
3639 error (_("Can not handle qOffsets TextSeg "
3640 "response with this symbol file"));
3647 free_symfile_segment_data (data
);
3651 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3653 /* This is a temporary kludge to force data and bss to use the
3654 same offsets because that's what nlmconv does now. The real
3655 solution requires changes to the stub and remote.c that I
3656 don't have time to do right now. */
3658 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3659 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3662 objfile_relocate (symfile_objfile
, offs
);
3665 /* Send interrupt_sequence to remote target. */
3667 send_interrupt_sequence (void)
3669 struct remote_state
*rs
= get_remote_state ();
3671 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3672 remote_serial_write ("\x03", 1);
3673 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3674 serial_send_break (rs
->remote_desc
);
3675 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3677 serial_send_break (rs
->remote_desc
);
3678 remote_serial_write ("g", 1);
3681 internal_error (__FILE__
, __LINE__
,
3682 _("Invalid value for interrupt_sequence_mode: %s."),
3683 interrupt_sequence_mode
);
3687 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3688 and extract the PTID. Returns NULL_PTID if not found. */
3691 stop_reply_extract_thread (char *stop_reply
)
3693 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3697 /* Txx r:val ; r:val (...) */
3700 /* Look for "register" named "thread". */
3705 p1
= strchr (p
, ':');
3709 if (strncmp (p
, "thread", p1
- p
) == 0)
3710 return read_ptid (++p1
, &p
);
3712 p1
= strchr (p
, ';');
3724 /* Determine the remote side's current thread. If we have a stop
3725 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3726 "thread" register we can extract the current thread from. If not,
3727 ask the remote which is the current thread with qC. The former
3728 method avoids a roundtrip. */
3731 get_current_thread (char *wait_status
)
3733 ptid_t ptid
= null_ptid
;
3735 /* Note we don't use remote_parse_stop_reply as that makes use of
3736 the target architecture, which we haven't yet fully determined at
3738 if (wait_status
!= NULL
)
3739 ptid
= stop_reply_extract_thread (wait_status
);
3740 if (ptid_equal (ptid
, null_ptid
))
3741 ptid
= remote_current_thread (inferior_ptid
);
3746 /* Query the remote target for which is the current thread/process,
3747 add it to our tables, and update INFERIOR_PTID. The caller is
3748 responsible for setting the state such that the remote end is ready
3749 to return the current thread.
3751 This function is called after handling the '?' or 'vRun' packets,
3752 whose response is a stop reply from which we can also try
3753 extracting the thread. If the target doesn't support the explicit
3754 qC query, we infer the current thread from that stop reply, passed
3755 in in WAIT_STATUS, which may be NULL. */
3758 add_current_inferior_and_thread (char *wait_status
)
3760 struct remote_state
*rs
= get_remote_state ();
3763 inferior_ptid
= null_ptid
;
3765 /* Now, if we have thread information, update inferior_ptid. */
3766 ptid_t curr_ptid
= get_current_thread (wait_status
);
3768 if (curr_ptid
!= null_ptid
)
3770 if (!remote_multi_process_p (rs
))
3775 /* Without this, some commands which require an active target
3776 (such as kill) won't work. This variable serves (at least)
3777 double duty as both the pid of the target process (if it has
3778 such), and as a flag indicating that a target is active. */
3779 curr_ptid
= magic_null_ptid
;
3783 remote_add_inferior (fake_pid_p
, ptid_get_pid (curr_ptid
), -1, 1);
3785 /* Add the main thread and switch to it. Don't try reading
3786 registers yet, since we haven't fetched the target description
3788 thread_info
*tp
= add_thread_silent (curr_ptid
);
3789 switch_to_thread_no_regs (tp
);
3792 /* Print info about a thread that was found already stopped on
3796 print_one_stopped_thread (struct thread_info
*thread
)
3798 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
3800 switch_to_thread (thread
->ptid
);
3801 stop_pc
= get_frame_pc (get_current_frame ());
3802 set_current_sal_from_frame (get_current_frame ());
3804 thread
->suspend
.waitstatus_pending_p
= 0;
3806 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
3808 enum gdb_signal sig
= ws
->value
.sig
;
3810 if (signal_print_state (sig
))
3811 gdb::observers::signal_received
.notify (sig
);
3813 gdb::observers::normal_stop
.notify (NULL
, 1);
3816 /* Process all initial stop replies the remote side sent in response
3817 to the ? packet. These indicate threads that were already stopped
3818 on initial connection. We mark these threads as stopped and print
3819 their current frame before giving the user the prompt. */
3822 process_initial_stop_replies (int from_tty
)
3824 int pending_stop_replies
= stop_reply_queue_length ();
3825 struct inferior
*inf
;
3826 struct thread_info
*thread
;
3827 struct thread_info
*selected
= NULL
;
3828 struct thread_info
*lowest_stopped
= NULL
;
3829 struct thread_info
*first
= NULL
;
3831 /* Consume the initial pending events. */
3832 while (pending_stop_replies
-- > 0)
3834 ptid_t waiton_ptid
= minus_one_ptid
;
3836 struct target_waitstatus ws
;
3837 int ignore_event
= 0;
3838 struct thread_info
*thread
;
3840 memset (&ws
, 0, sizeof (ws
));
3841 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3843 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3847 case TARGET_WAITKIND_IGNORE
:
3848 case TARGET_WAITKIND_NO_RESUMED
:
3849 case TARGET_WAITKIND_SIGNALLED
:
3850 case TARGET_WAITKIND_EXITED
:
3851 /* We shouldn't see these, but if we do, just ignore. */
3853 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3857 case TARGET_WAITKIND_EXECD
:
3858 xfree (ws
.value
.execd_pathname
);
3867 thread
= find_thread_ptid (event_ptid
);
3869 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3871 enum gdb_signal sig
= ws
.value
.sig
;
3873 /* Stubs traditionally report SIGTRAP as initial signal,
3874 instead of signal 0. Suppress it. */
3875 if (sig
== GDB_SIGNAL_TRAP
)
3877 thread
->suspend
.stop_signal
= sig
;
3881 thread
->suspend
.waitstatus
= ws
;
3883 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
3884 || ws
.value
.sig
!= GDB_SIGNAL_0
)
3885 thread
->suspend
.waitstatus_pending_p
= 1;
3887 set_executing (event_ptid
, 0);
3888 set_running (event_ptid
, 0);
3889 get_remote_thread_info (thread
)->vcont_resumed
= 0;
3892 /* "Notice" the new inferiors before anything related to
3893 registers/memory. */
3899 inf
->needs_setup
= 1;
3903 thread
= any_live_thread_of_process (inf
->pid
);
3904 notice_new_inferior (thread
->ptid
,
3905 thread
->state
== THREAD_RUNNING
,
3910 /* If all-stop on top of non-stop, pause all threads. Note this
3911 records the threads' stop pc, so must be done after "noticing"
3915 stop_all_threads ();
3917 /* If all threads of an inferior were already stopped, we
3918 haven't setup the inferior yet. */
3924 if (inf
->needs_setup
)
3926 thread
= any_live_thread_of_process (inf
->pid
);
3927 switch_to_thread_no_regs (thread
);
3933 /* Now go over all threads that are stopped, and print their current
3934 frame. If all-stop, then if there's a signalled thread, pick
3936 ALL_NON_EXITED_THREADS (thread
)
3942 set_running (thread
->ptid
, 0);
3943 else if (thread
->state
!= THREAD_STOPPED
)
3946 if (selected
== NULL
3947 && thread
->suspend
.waitstatus_pending_p
)
3950 if (lowest_stopped
== NULL
3951 || thread
->inf
->num
< lowest_stopped
->inf
->num
3952 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
3953 lowest_stopped
= thread
;
3956 print_one_stopped_thread (thread
);
3959 /* In all-stop, we only print the status of one thread, and leave
3960 others with their status pending. */
3965 thread
= lowest_stopped
;
3969 print_one_stopped_thread (thread
);
3972 /* For "info program". */
3973 thread
= inferior_thread ();
3974 if (thread
->state
== THREAD_STOPPED
)
3975 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
3978 /* Start the remote connection and sync state. */
3981 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
3983 struct remote_state
*rs
= get_remote_state ();
3984 struct packet_config
*noack_config
;
3985 char *wait_status
= NULL
;
3987 /* Signal other parts that we're going through the initial setup,
3988 and so things may not be stable yet. E.g., we don't try to
3989 install tracepoints until we've relocated symbols. Also, a
3990 Ctrl-C before we're connected and synced up can't interrupt the
3991 target. Instead, it offers to drop the (potentially wedged)
3993 rs
->starting_up
= 1;
3997 if (interrupt_on_connect
)
3998 send_interrupt_sequence ();
4000 /* Ack any packet which the remote side has already sent. */
4001 remote_serial_write ("+", 1);
4003 /* The first packet we send to the target is the optional "supported
4004 packets" request. If the target can answer this, it will tell us
4005 which later probes to skip. */
4006 remote_query_supported ();
4008 /* If the stub wants to get a QAllow, compose one and send it. */
4009 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4010 remote_set_permissions (target
);
4012 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4013 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4014 as a reply to known packet. For packet "vFile:setfs:" it is an
4015 invalid reply and GDB would return error in
4016 remote_hostio_set_filesystem, making remote files access impossible.
4017 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4018 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4020 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4022 putpkt (v_mustreplyempty
);
4023 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4024 if (strcmp (rs
->buf
, "OK") == 0)
4025 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4026 else if (strcmp (rs
->buf
, "") != 0)
4027 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4031 /* Next, we possibly activate noack mode.
4033 If the QStartNoAckMode packet configuration is set to AUTO,
4034 enable noack mode if the stub reported a wish for it with
4037 If set to TRUE, then enable noack mode even if the stub didn't
4038 report it in qSupported. If the stub doesn't reply OK, the
4039 session ends with an error.
4041 If FALSE, then don't activate noack mode, regardless of what the
4042 stub claimed should be the default with qSupported. */
4044 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4045 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4047 putpkt ("QStartNoAckMode");
4048 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4049 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4055 /* Tell the remote that we are using the extended protocol. */
4057 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4060 /* Let the target know which signals it is allowed to pass down to
4062 update_signals_program_target ();
4064 /* Next, if the target can specify a description, read it. We do
4065 this before anything involving memory or registers. */
4066 target_find_description ();
4068 /* Next, now that we know something about the target, update the
4069 address spaces in the program spaces. */
4070 update_address_spaces ();
4072 /* On OSs where the list of libraries is global to all
4073 processes, we fetch them early. */
4074 if (gdbarch_has_global_solist (target_gdbarch ()))
4075 solib_add (NULL
, from_tty
, auto_solib_add
);
4077 if (target_is_non_stop_p ())
4079 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4080 error (_("Non-stop mode requested, but remote "
4081 "does not support non-stop"));
4083 putpkt ("QNonStop:1");
4084 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4086 if (strcmp (rs
->buf
, "OK") != 0)
4087 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4089 /* Find about threads and processes the stub is already
4090 controlling. We default to adding them in the running state.
4091 The '?' query below will then tell us about which threads are
4093 remote_update_thread_list (target
);
4095 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4097 /* Don't assume that the stub can operate in all-stop mode.
4098 Request it explicitly. */
4099 putpkt ("QNonStop:0");
4100 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4102 if (strcmp (rs
->buf
, "OK") != 0)
4103 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4106 /* Upload TSVs regardless of whether the target is running or not. The
4107 remote stub, such as GDBserver, may have some predefined or builtin
4108 TSVs, even if the target is not running. */
4109 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4111 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4113 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
4114 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4117 /* Check whether the target is running now. */
4119 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4121 if (!target_is_non_stop_p ())
4123 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4126 error (_("The target is not running (try extended-remote?)"));
4128 /* We're connected, but not running. Drop out before we
4129 call start_remote. */
4130 rs
->starting_up
= 0;
4135 /* Save the reply for later. */
4136 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4137 strcpy (wait_status
, rs
->buf
);
4140 /* Fetch thread list. */
4141 target_update_thread_list ();
4143 /* Let the stub know that we want it to return the thread. */
4144 set_continue_thread (minus_one_ptid
);
4146 if (thread_count () == 0)
4148 /* Target has no concept of threads at all. GDB treats
4149 non-threaded target as single-threaded; add a main
4151 add_current_inferior_and_thread (wait_status
);
4155 /* We have thread information; select the thread the target
4156 says should be current. If we're reconnecting to a
4157 multi-threaded program, this will ideally be the thread
4158 that last reported an event before GDB disconnected. */
4159 inferior_ptid
= get_current_thread (wait_status
);
4160 if (ptid_equal (inferior_ptid
, null_ptid
))
4162 /* Odd... The target was able to list threads, but not
4163 tell us which thread was current (no "thread"
4164 register in T stop reply?). Just pick the first
4165 thread in the thread list then. */
4168 fprintf_unfiltered (gdb_stdlog
,
4169 "warning: couldn't determine remote "
4170 "current thread; picking first in list.\n");
4172 inferior_ptid
= thread_list
->ptid
;
4176 /* init_wait_for_inferior should be called before get_offsets in order
4177 to manage `inserted' flag in bp loc in a correct state.
4178 breakpoint_init_inferior, called from init_wait_for_inferior, set
4179 `inserted' flag to 0, while before breakpoint_re_set, called from
4180 start_remote, set `inserted' flag to 1. In the initialization of
4181 inferior, breakpoint_init_inferior should be called first, and then
4182 breakpoint_re_set can be called. If this order is broken, state of
4183 `inserted' flag is wrong, and cause some problems on breakpoint
4185 init_wait_for_inferior ();
4187 get_offsets (); /* Get text, data & bss offsets. */
4189 /* If we could not find a description using qXfer, and we know
4190 how to do it some other way, try again. This is not
4191 supported for non-stop; it could be, but it is tricky if
4192 there are no stopped threads when we connect. */
4193 if (remote_read_description_p (target
)
4194 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4196 target_clear_description ();
4197 target_find_description ();
4200 /* Use the previously fetched status. */
4201 gdb_assert (wait_status
!= NULL
);
4202 strcpy (rs
->buf
, wait_status
);
4203 rs
->cached_wait_status
= 1;
4205 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4209 /* Clear WFI global state. Do this before finding about new
4210 threads and inferiors, and setting the current inferior.
4211 Otherwise we would clear the proceed status of the current
4212 inferior when we want its stop_soon state to be preserved
4213 (see notice_new_inferior). */
4214 init_wait_for_inferior ();
4216 /* In non-stop, we will either get an "OK", meaning that there
4217 are no stopped threads at this time; or, a regular stop
4218 reply. In the latter case, there may be more than one thread
4219 stopped --- we pull them all out using the vStopped
4221 if (strcmp (rs
->buf
, "OK") != 0)
4223 struct notif_client
*notif
= ¬if_client_stop
;
4225 /* remote_notif_get_pending_replies acks this one, and gets
4227 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4228 = remote_notif_parse (notif
, rs
->buf
);
4229 remote_notif_get_pending_events (notif
);
4232 if (thread_count () == 0)
4235 error (_("The target is not running (try extended-remote?)"));
4237 /* We're connected, but not running. Drop out before we
4238 call start_remote. */
4239 rs
->starting_up
= 0;
4243 /* In non-stop mode, any cached wait status will be stored in
4244 the stop reply queue. */
4245 gdb_assert (wait_status
== NULL
);
4247 /* Report all signals during attach/startup. */
4248 remote_pass_signals (target
, 0, NULL
);
4250 /* If there are already stopped threads, mark them stopped and
4251 report their stops before giving the prompt to the user. */
4252 process_initial_stop_replies (from_tty
);
4254 if (target_can_async_p ())
4258 /* If we connected to a live target, do some additional setup. */
4259 if (target_has_execution
)
4261 if (symfile_objfile
) /* No use without a symbol-file. */
4262 remote_check_symbols ();
4265 /* Possibly the target has been engaged in a trace run started
4266 previously; find out where things are at. */
4267 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4269 struct uploaded_tp
*uploaded_tps
= NULL
;
4271 if (current_trace_status ()->running
)
4272 printf_filtered (_("Trace is already running on the target.\n"));
4274 remote_upload_tracepoints (target
, &uploaded_tps
);
4276 merge_uploaded_tracepoints (&uploaded_tps
);
4279 /* Possibly the target has been engaged in a btrace record started
4280 previously; find out where things are at. */
4281 remote_btrace_maybe_reopen ();
4283 /* The thread and inferior lists are now synchronized with the
4284 target, our symbols have been relocated, and we're merged the
4285 target's tracepoints with ours. We're done with basic start
4287 rs
->starting_up
= 0;
4289 /* Maybe breakpoints are global and need to be inserted now. */
4290 if (breakpoints_should_be_inserted_now ())
4291 insert_breakpoints ();
4294 /* Open a connection to a remote debugger.
4295 NAME is the filename used for communication. */
4298 remote_open (const char *name
, int from_tty
)
4300 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4303 /* Open a connection to a remote debugger using the extended
4304 remote gdb protocol. NAME is the filename used for communication. */
4307 extended_remote_open (const char *name
, int from_tty
)
4309 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4312 /* Reset all packets back to "unknown support". Called when opening a
4313 new connection to a remote target. */
4316 reset_all_packet_configs_support (void)
4320 for (i
= 0; i
< PACKET_MAX
; i
++)
4321 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4324 /* Initialize all packet configs. */
4327 init_all_packet_configs (void)
4331 for (i
= 0; i
< PACKET_MAX
; i
++)
4333 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4334 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4338 /* Symbol look-up. */
4341 remote_check_symbols (void)
4343 char *msg
, *reply
, *tmp
;
4346 struct cleanup
*old_chain
;
4348 /* The remote side has no concept of inferiors that aren't running
4349 yet, it only knows about running processes. If we're connected
4350 but our current inferior is not running, we should not invite the
4351 remote target to request symbol lookups related to its
4352 (unrelated) current process. */
4353 if (!target_has_execution
)
4356 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4359 /* Make sure the remote is pointing at the right process. Note
4360 there's no way to select "no process". */
4361 set_general_process ();
4363 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4364 because we need both at the same time. */
4365 msg
= (char *) xmalloc (get_remote_packet_size ());
4366 old_chain
= make_cleanup (xfree
, msg
);
4367 reply
= (char *) xmalloc (get_remote_packet_size ());
4368 make_cleanup (free_current_contents
, &reply
);
4369 reply_size
= get_remote_packet_size ();
4371 /* Invite target to request symbol lookups. */
4373 putpkt ("qSymbol::");
4374 getpkt (&reply
, &reply_size
, 0);
4375 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4377 while (startswith (reply
, "qSymbol:"))
4379 struct bound_minimal_symbol sym
;
4382 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4384 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4385 if (sym
.minsym
== NULL
)
4386 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4389 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4390 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4392 /* If this is a function address, return the start of code
4393 instead of any data function descriptor. */
4394 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4398 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4399 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4403 getpkt (&reply
, &reply_size
, 0);
4406 do_cleanups (old_chain
);
4409 static struct serial
*
4410 remote_serial_open (const char *name
)
4412 static int udp_warning
= 0;
4414 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4415 of in ser-tcp.c, because it is the remote protocol assuming that the
4416 serial connection is reliable and not the serial connection promising
4418 if (!udp_warning
&& startswith (name
, "udp:"))
4420 warning (_("The remote protocol may be unreliable over UDP.\n"
4421 "Some events may be lost, rendering further debugging "
4426 return serial_open (name
);
4429 /* Inform the target of our permission settings. The permission flags
4430 work without this, but if the target knows the settings, it can do
4431 a couple things. First, it can add its own check, to catch cases
4432 that somehow manage to get by the permissions checks in target
4433 methods. Second, if the target is wired to disallow particular
4434 settings (for instance, a system in the field that is not set up to
4435 be able to stop at a breakpoint), it can object to any unavailable
4439 remote_set_permissions (struct target_ops
*self
)
4441 struct remote_state
*rs
= get_remote_state ();
4443 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4444 "WriteReg:%x;WriteMem:%x;"
4445 "InsertBreak:%x;InsertTrace:%x;"
4446 "InsertFastTrace:%x;Stop:%x",
4447 may_write_registers
, may_write_memory
,
4448 may_insert_breakpoints
, may_insert_tracepoints
,
4449 may_insert_fast_tracepoints
, may_stop
);
4451 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4453 /* If the target didn't like the packet, warn the user. Do not try
4454 to undo the user's settings, that would just be maddening. */
4455 if (strcmp (rs
->buf
, "OK") != 0)
4456 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4459 /* This type describes each known response to the qSupported
4461 struct protocol_feature
4463 /* The name of this protocol feature. */
4466 /* The default for this protocol feature. */
4467 enum packet_support default_support
;
4469 /* The function to call when this feature is reported, or after
4470 qSupported processing if the feature is not supported.
4471 The first argument points to this structure. The second
4472 argument indicates whether the packet requested support be
4473 enabled, disabled, or probed (or the default, if this function
4474 is being called at the end of processing and this feature was
4475 not reported). The third argument may be NULL; if not NULL, it
4476 is a NUL-terminated string taken from the packet following
4477 this feature's name and an equals sign. */
4478 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4481 /* The corresponding packet for this feature. Only used if
4482 FUNC is remote_supported_packet. */
4487 remote_supported_packet (const struct protocol_feature
*feature
,
4488 enum packet_support support
,
4489 const char *argument
)
4493 warning (_("Remote qSupported response supplied an unexpected value for"
4494 " \"%s\"."), feature
->name
);
4498 remote_protocol_packets
[feature
->packet
].support
= support
;
4502 remote_packet_size (const struct protocol_feature
*feature
,
4503 enum packet_support support
, const char *value
)
4505 struct remote_state
*rs
= get_remote_state ();
4510 if (support
!= PACKET_ENABLE
)
4513 if (value
== NULL
|| *value
== '\0')
4515 warning (_("Remote target reported \"%s\" without a size."),
4521 packet_size
= strtol (value
, &value_end
, 16);
4522 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4524 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4525 feature
->name
, value
);
4529 /* Record the new maximum packet size. */
4530 rs
->explicit_packet_size
= packet_size
;
4533 static const struct protocol_feature remote_protocol_features
[] = {
4534 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4535 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4536 PACKET_qXfer_auxv
},
4537 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4538 PACKET_qXfer_exec_file
},
4539 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4540 PACKET_qXfer_features
},
4541 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4542 PACKET_qXfer_libraries
},
4543 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4544 PACKET_qXfer_libraries_svr4
},
4545 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4546 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4547 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4548 PACKET_qXfer_memory_map
},
4549 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4550 PACKET_qXfer_spu_read
},
4551 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4552 PACKET_qXfer_spu_write
},
4553 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4554 PACKET_qXfer_osdata
},
4555 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4556 PACKET_qXfer_threads
},
4557 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4558 PACKET_qXfer_traceframe_info
},
4559 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4560 PACKET_QPassSignals
},
4561 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
4562 PACKET_QCatchSyscalls
},
4563 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4564 PACKET_QProgramSignals
},
4565 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
4566 PACKET_QSetWorkingDir
},
4567 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
4568 PACKET_QStartupWithShell
},
4569 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
4570 PACKET_QEnvironmentHexEncoded
},
4571 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
4572 PACKET_QEnvironmentReset
},
4573 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
4574 PACKET_QEnvironmentUnset
},
4575 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4576 PACKET_QStartNoAckMode
},
4577 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4578 PACKET_multiprocess_feature
},
4579 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4580 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4581 PACKET_qXfer_siginfo_read
},
4582 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4583 PACKET_qXfer_siginfo_write
},
4584 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4585 PACKET_ConditionalTracepoints
},
4586 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4587 PACKET_ConditionalBreakpoints
},
4588 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4589 PACKET_BreakpointCommands
},
4590 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4591 PACKET_FastTracepoints
},
4592 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4593 PACKET_StaticTracepoints
},
4594 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4595 PACKET_InstallInTrace
},
4596 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4597 PACKET_DisconnectedTracing_feature
},
4598 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4600 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4602 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4603 PACKET_TracepointSource
},
4604 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4606 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4607 PACKET_EnableDisableTracepoints_feature
},
4608 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4609 PACKET_qXfer_fdpic
},
4610 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4612 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4613 PACKET_QDisableRandomization
},
4614 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4615 { "QTBuffer:size", PACKET_DISABLE
,
4616 remote_supported_packet
, PACKET_QTBuffer_size
},
4617 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4618 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4619 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4620 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4621 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4622 PACKET_qXfer_btrace
},
4623 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4624 PACKET_qXfer_btrace_conf
},
4625 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4626 PACKET_Qbtrace_conf_bts_size
},
4627 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4628 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4629 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4630 PACKET_fork_event_feature
},
4631 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4632 PACKET_vfork_event_feature
},
4633 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4634 PACKET_exec_event_feature
},
4635 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4636 PACKET_Qbtrace_conf_pt_size
},
4637 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
4638 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
4639 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
4642 static char *remote_support_xml
;
4644 /* Register string appended to "xmlRegisters=" in qSupported query. */
4647 register_remote_support_xml (const char *xml
)
4649 #if defined(HAVE_LIBEXPAT)
4650 if (remote_support_xml
== NULL
)
4651 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4654 char *copy
= xstrdup (remote_support_xml
+ 13);
4655 char *p
= strtok (copy
, ",");
4659 if (strcmp (p
, xml
) == 0)
4666 while ((p
= strtok (NULL
, ",")) != NULL
);
4669 remote_support_xml
= reconcat (remote_support_xml
,
4670 remote_support_xml
, ",", xml
,
4677 remote_query_supported_append (char *msg
, const char *append
)
4680 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4682 return xstrdup (append
);
4686 remote_query_supported (void)
4688 struct remote_state
*rs
= get_remote_state ();
4691 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4693 /* The packet support flags are handled differently for this packet
4694 than for most others. We treat an error, a disabled packet, and
4695 an empty response identically: any features which must be reported
4696 to be used will be automatically disabled. An empty buffer
4697 accomplishes this, since that is also the representation for a list
4698 containing no features. */
4701 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4704 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4706 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4707 q
= remote_query_supported_append (q
, "multiprocess+");
4709 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4710 q
= remote_query_supported_append (q
, "swbreak+");
4711 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4712 q
= remote_query_supported_append (q
, "hwbreak+");
4714 q
= remote_query_supported_append (q
, "qRelocInsn+");
4716 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4717 != AUTO_BOOLEAN_FALSE
)
4718 q
= remote_query_supported_append (q
, "fork-events+");
4719 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4720 != AUTO_BOOLEAN_FALSE
)
4721 q
= remote_query_supported_append (q
, "vfork-events+");
4722 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4723 != AUTO_BOOLEAN_FALSE
)
4724 q
= remote_query_supported_append (q
, "exec-events+");
4726 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4727 q
= remote_query_supported_append (q
, "vContSupported+");
4729 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
4730 q
= remote_query_supported_append (q
, "QThreadEvents+");
4732 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
4733 q
= remote_query_supported_append (q
, "no-resumed+");
4735 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4736 the qSupported:xmlRegisters=i386 handling. */
4737 if (remote_support_xml
!= NULL
4738 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
4739 q
= remote_query_supported_append (q
, remote_support_xml
);
4741 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4744 do_cleanups (old_chain
);
4746 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4748 /* If an error occured, warn, but do not return - just reset the
4749 buffer to empty and go on to disable features. */
4750 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4753 warning (_("Remote failure reply: %s"), rs
->buf
);
4758 memset (seen
, 0, sizeof (seen
));
4763 enum packet_support is_supported
;
4764 char *p
, *end
, *name_end
, *value
;
4766 /* First separate out this item from the rest of the packet. If
4767 there's another item after this, we overwrite the separator
4768 (terminated strings are much easier to work with). */
4770 end
= strchr (p
, ';');
4773 end
= p
+ strlen (p
);
4783 warning (_("empty item in \"qSupported\" response"));
4788 name_end
= strchr (p
, '=');
4791 /* This is a name=value entry. */
4792 is_supported
= PACKET_ENABLE
;
4793 value
= name_end
+ 1;
4802 is_supported
= PACKET_ENABLE
;
4806 is_supported
= PACKET_DISABLE
;
4810 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4814 warning (_("unrecognized item \"%s\" "
4815 "in \"qSupported\" response"), p
);
4821 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4822 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4824 const struct protocol_feature
*feature
;
4827 feature
= &remote_protocol_features
[i
];
4828 feature
->func (feature
, is_supported
, value
);
4833 /* If we increased the packet size, make sure to increase the global
4834 buffer size also. We delay this until after parsing the entire
4835 qSupported packet, because this is the same buffer we were
4837 if (rs
->buf_size
< rs
->explicit_packet_size
)
4839 rs
->buf_size
= rs
->explicit_packet_size
;
4840 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4843 /* Handle the defaults for unmentioned features. */
4844 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4847 const struct protocol_feature
*feature
;
4849 feature
= &remote_protocol_features
[i
];
4850 feature
->func (feature
, feature
->default_support
, NULL
);
4854 /* Serial QUIT handler for the remote serial descriptor.
4856 Defers handling a Ctrl-C until we're done with the current
4857 command/response packet sequence, unless:
4859 - We're setting up the connection. Don't send a remote interrupt
4860 request, as we're not fully synced yet. Quit immediately
4863 - The target has been resumed in the foreground
4864 (target_terminal::is_ours is false) with a synchronous resume
4865 packet, and we're blocked waiting for the stop reply, thus a
4866 Ctrl-C should be immediately sent to the target.
4868 - We get a second Ctrl-C while still within the same serial read or
4869 write. In that case the serial is seemingly wedged --- offer to
4872 - We see a second Ctrl-C without target response, after having
4873 previously interrupted the target. In that case the target/stub
4874 is probably wedged --- offer to quit/disconnect.
4878 remote_serial_quit_handler (void)
4880 struct remote_state
*rs
= get_remote_state ();
4882 if (check_quit_flag ())
4884 /* If we're starting up, we're not fully synced yet. Quit
4886 if (rs
->starting_up
)
4888 else if (rs
->got_ctrlc_during_io
)
4890 if (query (_("The target is not responding to GDB commands.\n"
4891 "Stop debugging it? ")))
4892 remote_unpush_and_throw ();
4894 /* If ^C has already been sent once, offer to disconnect. */
4895 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
4897 /* All-stop protocol, and blocked waiting for stop reply. Send
4898 an interrupt request. */
4899 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
4900 target_interrupt ();
4902 rs
->got_ctrlc_during_io
= 1;
4906 /* Remove any of the remote.c targets from target stack. Upper targets depend
4907 on it so remove them first. */
4910 remote_unpush_target (void)
4912 pop_all_targets_at_and_above (process_stratum
);
4916 remote_unpush_and_throw (void)
4918 remote_unpush_target ();
4919 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
4923 remote_open_1 (const char *name
, int from_tty
,
4924 struct target_ops
*target
, int extended_p
)
4926 struct remote_state
*rs
= get_remote_state ();
4929 error (_("To open a remote debug connection, you need to specify what\n"
4930 "serial device is attached to the remote system\n"
4931 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4933 /* See FIXME above. */
4934 if (!target_async_permitted
)
4935 wait_forever_enabled_p
= 1;
4937 /* If we're connected to a running target, target_preopen will kill it.
4938 Ask this question first, before target_preopen has a chance to kill
4940 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
4943 && !query (_("Already connected to a remote target. Disconnect? ")))
4944 error (_("Still connected."));
4947 /* Here the possibly existing remote target gets unpushed. */
4948 target_preopen (from_tty
);
4950 /* Make sure we send the passed signals list the next time we resume. */
4951 xfree (rs
->last_pass_packet
);
4952 rs
->last_pass_packet
= NULL
;
4954 /* Make sure we send the program signals list the next time we
4956 xfree (rs
->last_program_signals_packet
);
4957 rs
->last_program_signals_packet
= NULL
;
4959 remote_fileio_reset ();
4960 reopen_exec_file ();
4963 rs
->remote_desc
= remote_serial_open (name
);
4964 if (!rs
->remote_desc
)
4965 perror_with_name (name
);
4967 if (baud_rate
!= -1)
4969 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
4971 /* The requested speed could not be set. Error out to
4972 top level after closing remote_desc. Take care to
4973 set remote_desc to NULL to avoid closing remote_desc
4975 serial_close (rs
->remote_desc
);
4976 rs
->remote_desc
= NULL
;
4977 perror_with_name (name
);
4981 serial_setparity (rs
->remote_desc
, serial_parity
);
4982 serial_raw (rs
->remote_desc
);
4984 /* If there is something sitting in the buffer we might take it as a
4985 response to a command, which would be bad. */
4986 serial_flush_input (rs
->remote_desc
);
4990 puts_filtered ("Remote debugging using ");
4991 puts_filtered (name
);
4992 puts_filtered ("\n");
4994 push_target (target
); /* Switch to using remote target now. */
4996 /* Register extra event sources in the event loop. */
4997 remote_async_inferior_event_token
4998 = create_async_event_handler (remote_async_inferior_event_handler
,
5000 rs
->notif_state
= remote_notif_state_allocate ();
5002 /* Reset the target state; these things will be queried either by
5003 remote_query_supported or as they are needed. */
5004 reset_all_packet_configs_support ();
5005 rs
->cached_wait_status
= 0;
5006 rs
->explicit_packet_size
= 0;
5008 rs
->extended
= extended_p
;
5009 rs
->waiting_for_stop_reply
= 0;
5010 rs
->ctrlc_pending_p
= 0;
5011 rs
->got_ctrlc_during_io
= 0;
5013 rs
->general_thread
= not_sent_ptid
;
5014 rs
->continue_thread
= not_sent_ptid
;
5015 rs
->remote_traceframe_number
= -1;
5017 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5019 /* Probe for ability to use "ThreadInfo" query, as required. */
5020 rs
->use_threadinfo_query
= 1;
5021 rs
->use_threadextra_query
= 1;
5023 readahead_cache_invalidate ();
5025 if (target_async_permitted
)
5027 /* FIXME: cagney/1999-09-23: During the initial connection it is
5028 assumed that the target is already ready and able to respond to
5029 requests. Unfortunately remote_start_remote() eventually calls
5030 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5031 around this. Eventually a mechanism that allows
5032 wait_for_inferior() to expect/get timeouts will be
5034 wait_forever_enabled_p
= 0;
5037 /* First delete any symbols previously loaded from shared libraries. */
5038 no_shared_libraries (NULL
, 0);
5041 init_thread_list ();
5043 /* Start the remote connection. If error() or QUIT, discard this
5044 target (we'd otherwise be in an inconsistent state) and then
5045 propogate the error on up the exception chain. This ensures that
5046 the caller doesn't stumble along blindly assuming that the
5047 function succeeded. The CLI doesn't have this problem but other
5048 UI's, such as MI do.
5050 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5051 this function should return an error indication letting the
5052 caller restore the previous state. Unfortunately the command
5053 ``target remote'' is directly wired to this function making that
5054 impossible. On a positive note, the CLI side of this problem has
5055 been fixed - the function set_cmd_context() makes it possible for
5056 all the ``target ....'' commands to share a common callback
5057 function. See cli-dump.c. */
5062 remote_start_remote (from_tty
, target
, extended_p
);
5064 CATCH (ex
, RETURN_MASK_ALL
)
5066 /* Pop the partially set up target - unless something else did
5067 already before throwing the exception. */
5068 if (rs
->remote_desc
!= NULL
)
5069 remote_unpush_target ();
5070 if (target_async_permitted
)
5071 wait_forever_enabled_p
= 1;
5072 throw_exception (ex
);
5077 remote_btrace_reset ();
5079 if (target_async_permitted
)
5080 wait_forever_enabled_p
= 1;
5083 /* Detach the specified process. */
5086 remote_detach_pid (int pid
)
5088 struct remote_state
*rs
= get_remote_state ();
5090 if (remote_multi_process_p (rs
))
5091 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5093 strcpy (rs
->buf
, "D");
5096 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5098 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5100 else if (rs
->buf
[0] == '\0')
5101 error (_("Remote doesn't know how to detach"));
5103 error (_("Can't detach process."));
5106 /* This detaches a program to which we previously attached, using
5107 inferior_ptid to identify the process. After this is done, GDB
5108 can be used to debug some other program. We better not have left
5109 any breakpoints in the target program or it'll die when it hits
5113 remote_detach_1 (int from_tty
, inferior
*inf
)
5115 int pid
= ptid_get_pid (inferior_ptid
);
5116 struct remote_state
*rs
= get_remote_state ();
5117 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5120 if (!target_has_execution
)
5121 error (_("No process to detach from."));
5123 target_announce_detach (from_tty
);
5125 /* Tell the remote target to detach. */
5126 remote_detach_pid (pid
);
5128 /* Exit only if this is the only active inferior. */
5129 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5130 puts_filtered (_("Ending remote debugging.\n"));
5132 /* Check to see if we are detaching a fork parent. Note that if we
5133 are detaching a fork child, tp == NULL. */
5134 is_fork_parent
= (tp
!= NULL
5135 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5137 /* If doing detach-on-fork, we don't mourn, because that will delete
5138 breakpoints that should be available for the followed inferior. */
5139 if (!is_fork_parent
)
5140 target_mourn_inferior (inferior_ptid
);
5143 inferior_ptid
= null_ptid
;
5144 detach_inferior (pid
);
5149 remote_detach (struct target_ops
*ops
, inferior
*inf
, int from_tty
)
5151 remote_detach_1 (from_tty
, inf
);
5155 extended_remote_detach (struct target_ops
*ops
, inferior
*inf
, int from_tty
)
5157 remote_detach_1 (from_tty
, inf
);
5160 /* Target follow-fork function for remote targets. On entry, and
5161 at return, the current inferior is the fork parent.
5163 Note that although this is currently only used for extended-remote,
5164 it is named remote_follow_fork in anticipation of using it for the
5165 remote target as well. */
5168 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5171 struct remote_state
*rs
= get_remote_state ();
5172 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5174 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5175 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5177 /* When following the parent and detaching the child, we detach
5178 the child here. For the case of following the child and
5179 detaching the parent, the detach is done in the target-
5180 independent follow fork code in infrun.c. We can't use
5181 target_detach when detaching an unfollowed child because
5182 the client side doesn't know anything about the child. */
5183 if (detach_fork
&& !follow_child
)
5185 /* Detach the fork child. */
5189 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5190 child_pid
= ptid_get_pid (child_ptid
);
5192 remote_detach_pid (child_pid
);
5198 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5199 in the program space of the new inferior. On entry and at return the
5200 current inferior is the exec'ing inferior. INF is the new exec'd
5201 inferior, which may be the same as the exec'ing inferior unless
5202 follow-exec-mode is "new". */
5205 remote_follow_exec (struct target_ops
*ops
,
5206 struct inferior
*inf
, char *execd_pathname
)
5208 /* We know that this is a target file name, so if it has the "target:"
5209 prefix we strip it off before saving it in the program space. */
5210 if (is_target_filename (execd_pathname
))
5211 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5213 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5216 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5219 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5222 error (_("Argument given to \"disconnect\" when remotely debugging."));
5224 /* Make sure we unpush even the extended remote targets. Calling
5225 target_mourn_inferior won't unpush, and remote_mourn won't
5226 unpush if there is more than one inferior left. */
5227 unpush_target (target
);
5228 generic_mourn_inferior ();
5231 puts_filtered ("Ending remote debugging.\n");
5234 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5235 be chatty about it. */
5238 extended_remote_attach (struct target_ops
*target
, const char *args
,
5241 struct remote_state
*rs
= get_remote_state ();
5243 char *wait_status
= NULL
;
5245 pid
= parse_pid_to_attach (args
);
5247 /* Remote PID can be freely equal to getpid, do not check it here the same
5248 way as in other targets. */
5250 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5251 error (_("This target does not support attaching to a process"));
5255 char *exec_file
= get_exec_file (0);
5258 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5259 target_pid_to_str (pid_to_ptid (pid
)));
5261 printf_unfiltered (_("Attaching to %s\n"),
5262 target_pid_to_str (pid_to_ptid (pid
)));
5264 gdb_flush (gdb_stdout
);
5267 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5269 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5271 switch (packet_ok (rs
->buf
,
5272 &remote_protocol_packets
[PACKET_vAttach
]))
5275 if (!target_is_non_stop_p ())
5277 /* Save the reply for later. */
5278 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5279 strcpy (wait_status
, rs
->buf
);
5281 else if (strcmp (rs
->buf
, "OK") != 0)
5282 error (_("Attaching to %s failed with: %s"),
5283 target_pid_to_str (pid_to_ptid (pid
)),
5286 case PACKET_UNKNOWN
:
5287 error (_("This target does not support attaching to a process"));
5289 error (_("Attaching to %s failed"),
5290 target_pid_to_str (pid_to_ptid (pid
)));
5293 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5295 inferior_ptid
= pid_to_ptid (pid
);
5297 if (target_is_non_stop_p ())
5299 struct thread_info
*thread
;
5301 /* Get list of threads. */
5302 remote_update_thread_list (target
);
5304 thread
= first_thread_of_process (pid
);
5306 inferior_ptid
= thread
->ptid
;
5308 inferior_ptid
= pid_to_ptid (pid
);
5310 /* Invalidate our notion of the remote current thread. */
5311 record_currthread (rs
, minus_one_ptid
);
5315 /* Now, if we have thread information, update inferior_ptid. */
5316 inferior_ptid
= remote_current_thread (inferior_ptid
);
5318 /* Add the main thread to the thread list. */
5319 thread_info
*thr
= add_thread_silent (inferior_ptid
);
5320 /* Don't consider the thread stopped until we've processed the
5321 saved stop reply. */
5322 set_executing (thr
->ptid
, true);
5325 /* Next, if the target can specify a description, read it. We do
5326 this before anything involving memory or registers. */
5327 target_find_description ();
5329 if (!target_is_non_stop_p ())
5331 /* Use the previously fetched status. */
5332 gdb_assert (wait_status
!= NULL
);
5334 if (target_can_async_p ())
5336 struct notif_event
*reply
5337 = remote_notif_parse (¬if_client_stop
, wait_status
);
5339 push_stop_reply ((struct stop_reply
*) reply
);
5345 gdb_assert (wait_status
!= NULL
);
5346 strcpy (rs
->buf
, wait_status
);
5347 rs
->cached_wait_status
= 1;
5351 gdb_assert (wait_status
== NULL
);
5354 /* Implementation of the to_post_attach method. */
5357 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5359 /* Get text, data & bss offsets. */
5362 /* In certain cases GDB might not have had the chance to start
5363 symbol lookup up until now. This could happen if the debugged
5364 binary is not using shared libraries, the vsyscall page is not
5365 present (on Linux) and the binary itself hadn't changed since the
5366 debugging process was started. */
5367 if (symfile_objfile
!= NULL
)
5368 remote_check_symbols();
5372 /* Check for the availability of vCont. This function should also check
5376 remote_vcont_probe (struct remote_state
*rs
)
5380 strcpy (rs
->buf
, "vCont?");
5382 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5385 /* Make sure that the features we assume are supported. */
5386 if (startswith (buf
, "vCont"))
5389 int support_c
, support_C
;
5391 rs
->supports_vCont
.s
= 0;
5392 rs
->supports_vCont
.S
= 0;
5395 rs
->supports_vCont
.t
= 0;
5396 rs
->supports_vCont
.r
= 0;
5397 while (p
&& *p
== ';')
5400 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5401 rs
->supports_vCont
.s
= 1;
5402 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5403 rs
->supports_vCont
.S
= 1;
5404 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5406 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5408 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5409 rs
->supports_vCont
.t
= 1;
5410 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5411 rs
->supports_vCont
.r
= 1;
5413 p
= strchr (p
, ';');
5416 /* If c, and C are not all supported, we can't use vCont. Clearing
5417 BUF will make packet_ok disable the packet. */
5418 if (!support_c
|| !support_C
)
5422 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5425 /* Helper function for building "vCont" resumptions. Write a
5426 resumption to P. ENDP points to one-passed-the-end of the buffer
5427 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5428 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5429 resumed thread should be single-stepped and/or signalled. If PTID
5430 equals minus_one_ptid, then all threads are resumed; if PTID
5431 represents a process, then all threads of the process are resumed;
5432 the thread to be stepped and/or signalled is given in the global
5436 append_resumption (char *p
, char *endp
,
5437 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5439 struct remote_state
*rs
= get_remote_state ();
5441 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5442 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5444 /* GDB is willing to range step. */
5445 && use_range_stepping
5446 /* Target supports range stepping. */
5447 && rs
->supports_vCont
.r
5448 /* We don't currently support range stepping multiple
5449 threads with a wildcard (though the protocol allows it,
5450 so stubs shouldn't make an active effort to forbid
5452 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5454 struct thread_info
*tp
;
5456 if (ptid_equal (ptid
, minus_one_ptid
))
5458 /* If we don't know about the target thread's tid, then
5459 we're resuming magic_null_ptid (see caller). */
5460 tp
= find_thread_ptid (magic_null_ptid
);
5463 tp
= find_thread_ptid (ptid
);
5464 gdb_assert (tp
!= NULL
);
5466 if (tp
->control
.may_range_step
)
5468 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5470 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5471 phex_nz (tp
->control
.step_range_start
,
5473 phex_nz (tp
->control
.step_range_end
,
5477 p
+= xsnprintf (p
, endp
- p
, ";s");
5480 p
+= xsnprintf (p
, endp
- p
, ";s");
5481 else if (siggnal
!= GDB_SIGNAL_0
)
5482 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5484 p
+= xsnprintf (p
, endp
- p
, ";c");
5486 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5490 /* All (-1) threads of process. */
5491 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5493 p
+= xsnprintf (p
, endp
- p
, ":");
5494 p
= write_ptid (p
, endp
, nptid
);
5496 else if (!ptid_equal (ptid
, minus_one_ptid
))
5498 p
+= xsnprintf (p
, endp
- p
, ":");
5499 p
= write_ptid (p
, endp
, ptid
);
5505 /* Clear the thread's private info on resume. */
5508 resume_clear_thread_private_info (struct thread_info
*thread
)
5510 if (thread
->priv
!= NULL
)
5512 remote_thread_info
*priv
= get_remote_thread_info (thread
);
5514 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5515 priv
->watch_data_address
= 0;
5519 /* Append a vCont continue-with-signal action for threads that have a
5520 non-zero stop signal. */
5523 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5525 struct thread_info
*thread
;
5527 ALL_NON_EXITED_THREADS (thread
)
5528 if (ptid_match (thread
->ptid
, ptid
)
5529 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5530 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5532 p
= append_resumption (p
, endp
, thread
->ptid
,
5533 0, thread
->suspend
.stop_signal
);
5534 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5535 resume_clear_thread_private_info (thread
);
5541 /* Set the target running, using the packets that use Hc
5545 remote_resume_with_hc (struct target_ops
*ops
,
5546 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5548 struct remote_state
*rs
= get_remote_state ();
5549 struct thread_info
*thread
;
5552 rs
->last_sent_signal
= siggnal
;
5553 rs
->last_sent_step
= step
;
5555 /* The c/s/C/S resume packets use Hc, so set the continue
5557 if (ptid_equal (ptid
, minus_one_ptid
))
5558 set_continue_thread (any_thread_ptid
);
5560 set_continue_thread (ptid
);
5562 ALL_NON_EXITED_THREADS (thread
)
5563 resume_clear_thread_private_info (thread
);
5566 if (execution_direction
== EXEC_REVERSE
)
5568 /* We don't pass signals to the target in reverse exec mode. */
5569 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5570 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5573 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5574 error (_("Remote reverse-step not supported."));
5575 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5576 error (_("Remote reverse-continue not supported."));
5578 strcpy (buf
, step
? "bs" : "bc");
5580 else if (siggnal
!= GDB_SIGNAL_0
)
5582 buf
[0] = step
? 'S' : 'C';
5583 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5584 buf
[2] = tohex (((int) siggnal
) & 0xf);
5588 strcpy (buf
, step
? "s" : "c");
5593 /* Resume the remote inferior by using a "vCont" packet. The thread
5594 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5595 resumed thread should be single-stepped and/or signalled. If PTID
5596 equals minus_one_ptid, then all threads are resumed; the thread to
5597 be stepped and/or signalled is given in the global INFERIOR_PTID.
5598 This function returns non-zero iff it resumes the inferior.
5600 This function issues a strict subset of all possible vCont commands
5604 remote_resume_with_vcont (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5606 struct remote_state
*rs
= get_remote_state ();
5610 /* No reverse execution actions defined for vCont. */
5611 if (execution_direction
== EXEC_REVERSE
)
5614 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5615 remote_vcont_probe (rs
);
5617 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5621 endp
= rs
->buf
+ get_remote_packet_size ();
5623 /* If we could generate a wider range of packets, we'd have to worry
5624 about overflowing BUF. Should there be a generic
5625 "multi-part-packet" packet? */
5627 p
+= xsnprintf (p
, endp
- p
, "vCont");
5629 if (ptid_equal (ptid
, magic_null_ptid
))
5631 /* MAGIC_NULL_PTID means that we don't have any active threads,
5632 so we don't have any TID numbers the inferior will
5633 understand. Make sure to only send forms that do not specify
5635 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5637 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5639 /* Resume all threads (of all processes, or of a single
5640 process), with preference for INFERIOR_PTID. This assumes
5641 inferior_ptid belongs to the set of all threads we are about
5643 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5645 /* Step inferior_ptid, with or without signal. */
5646 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5649 /* Also pass down any pending signaled resumption for other
5650 threads not the current. */
5651 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5653 /* And continue others without a signal. */
5654 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5658 /* Scheduler locking; resume only PTID. */
5659 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5662 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5665 if (target_is_non_stop_p ())
5667 /* In non-stop, the stub replies to vCont with "OK". The stop
5668 reply will be reported asynchronously by means of a `%Stop'
5670 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5671 if (strcmp (rs
->buf
, "OK") != 0)
5672 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5678 /* Tell the remote machine to resume. */
5681 remote_resume (struct target_ops
*ops
,
5682 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5684 struct remote_state
*rs
= get_remote_state ();
5686 /* When connected in non-stop mode, the core resumes threads
5687 individually. Resuming remote threads directly in target_resume
5688 would thus result in sending one packet per thread. Instead, to
5689 minimize roundtrip latency, here we just store the resume
5690 request; the actual remote resumption will be done in
5691 target_commit_resume / remote_commit_resume, where we'll be able
5692 to do vCont action coalescing. */
5693 if (target_is_non_stop_p () && execution_direction
!= EXEC_REVERSE
)
5695 remote_thread_info
*remote_thr
;
5697 if (ptid_equal (minus_one_ptid
, ptid
) || ptid_is_pid (ptid
))
5698 remote_thr
= get_remote_thread_info (inferior_ptid
);
5700 remote_thr
= get_remote_thread_info (ptid
);
5702 remote_thr
->last_resume_step
= step
;
5703 remote_thr
->last_resume_sig
= siggnal
;
5707 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5708 (explained in remote-notif.c:handle_notification) so
5709 remote_notif_process is not called. We need find a place where
5710 it is safe to start a 'vNotif' sequence. It is good to do it
5711 before resuming inferior, because inferior was stopped and no RSP
5712 traffic at that moment. */
5713 if (!target_is_non_stop_p ())
5714 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5716 rs
->last_resume_exec_dir
= execution_direction
;
5718 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5719 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
5720 remote_resume_with_hc (ops
, ptid
, step
, siggnal
);
5722 /* We are about to start executing the inferior, let's register it
5723 with the event loop. NOTE: this is the one place where all the
5724 execution commands end up. We could alternatively do this in each
5725 of the execution commands in infcmd.c. */
5726 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5727 into infcmd.c in order to allow inferior function calls to work
5728 NOT asynchronously. */
5729 if (target_can_async_p ())
5732 /* We've just told the target to resume. The remote server will
5733 wait for the inferior to stop, and then send a stop reply. In
5734 the mean time, we can't start another command/query ourselves
5735 because the stub wouldn't be ready to process it. This applies
5736 only to the base all-stop protocol, however. In non-stop (which
5737 only supports vCont), the stub replies with an "OK", and is
5738 immediate able to process further serial input. */
5739 if (!target_is_non_stop_p ())
5740 rs
->waiting_for_stop_reply
= 1;
5743 static void check_pending_events_prevent_wildcard_vcont
5744 (int *may_global_wildcard_vcont
);
5745 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
5747 /* Private per-inferior info for target remote processes. */
5749 struct remote_inferior
: public private_inferior
5751 /* Whether we can send a wildcard vCont for this process. */
5752 bool may_wildcard_vcont
= true;
5755 /* Get the remote private inferior data associated to INF. */
5757 static remote_inferior
*
5758 get_remote_inferior (inferior
*inf
)
5760 if (inf
->priv
== NULL
)
5761 inf
->priv
.reset (new remote_inferior
);
5763 return static_cast<remote_inferior
*> (inf
->priv
.get ());
5766 /* Structure used to track the construction of a vCont packet in the
5767 outgoing packet buffer. This is used to send multiple vCont
5768 packets if we have more actions than would fit a single packet. */
5770 struct vcont_builder
5772 /* Pointer to the first action. P points here if no action has been
5776 /* Where the next action will be appended. */
5779 /* The end of the buffer. Must never write past this. */
5783 /* Prepare the outgoing buffer for a new vCont packet. */
5786 vcont_builder_restart (struct vcont_builder
*builder
)
5788 struct remote_state
*rs
= get_remote_state ();
5790 builder
->p
= rs
->buf
;
5791 builder
->endp
= rs
->buf
+ get_remote_packet_size ();
5792 builder
->p
+= xsnprintf (builder
->p
, builder
->endp
- builder
->p
, "vCont");
5793 builder
->first_action
= builder
->p
;
5796 /* If the vCont packet being built has any action, send it to the
5800 vcont_builder_flush (struct vcont_builder
*builder
)
5802 struct remote_state
*rs
;
5804 if (builder
->p
== builder
->first_action
)
5807 rs
= get_remote_state ();
5809 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5810 if (strcmp (rs
->buf
, "OK") != 0)
5811 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5814 /* The largest action is range-stepping, with its two addresses. This
5815 is more than sufficient. If a new, bigger action is created, it'll
5816 quickly trigger a failed assertion in append_resumption (and we'll
5818 #define MAX_ACTION_SIZE 200
5820 /* Append a new vCont action in the outgoing packet being built. If
5821 the action doesn't fit the packet along with previous actions, push
5822 what we've got so far to the remote end and start over a new vCont
5823 packet (with the new action). */
5826 vcont_builder_push_action (struct vcont_builder
*builder
,
5827 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5829 char buf
[MAX_ACTION_SIZE
+ 1];
5833 endp
= append_resumption (buf
, buf
+ sizeof (buf
),
5834 ptid
, step
, siggnal
);
5836 /* Check whether this new action would fit in the vCont packet along
5837 with previous actions. If not, send what we've got so far and
5838 start a new vCont packet. */
5840 if (rsize
> builder
->endp
- builder
->p
)
5842 vcont_builder_flush (builder
);
5843 vcont_builder_restart (builder
);
5845 /* Should now fit. */
5846 gdb_assert (rsize
<= builder
->endp
- builder
->p
);
5849 memcpy (builder
->p
, buf
, rsize
);
5850 builder
->p
+= rsize
;
5854 /* to_commit_resume implementation. */
5857 remote_commit_resume (struct target_ops
*ops
)
5859 struct inferior
*inf
;
5860 struct thread_info
*tp
;
5861 int any_process_wildcard
;
5862 int may_global_wildcard_vcont
;
5863 struct vcont_builder vcont_builder
;
5865 /* If connected in all-stop mode, we'd send the remote resume
5866 request directly from remote_resume. Likewise if
5867 reverse-debugging, as there are no defined vCont actions for
5868 reverse execution. */
5869 if (!target_is_non_stop_p () || execution_direction
== EXEC_REVERSE
)
5872 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5873 instead of resuming all threads of each process individually.
5874 However, if any thread of a process must remain halted, we can't
5875 send wildcard resumes and must send one action per thread.
5877 Care must be taken to not resume threads/processes the server
5878 side already told us are stopped, but the core doesn't know about
5879 yet, because the events are still in the vStopped notification
5882 #1 => vCont s:p1.1;c
5884 #3 <= %Stopped T05 p1.1
5889 #8 (infrun handles the stop for p1.1 and continues stepping)
5890 #9 => vCont s:p1.1;c
5892 The last vCont above would resume thread p1.2 by mistake, because
5893 the server has no idea that the event for p1.2 had not been
5896 The server side must similarly ignore resume actions for the
5897 thread that has a pending %Stopped notification (and any other
5898 threads with events pending), until GDB acks the notification
5899 with vStopped. Otherwise, e.g., the following case is
5902 #1 => g (or any other packet)
5904 #3 <= %Stopped T05 p1.2
5905 #4 => vCont s:p1.1;c
5908 Above, the server must not resume thread p1.2. GDB can't know
5909 that p1.2 stopped until it acks the %Stopped notification, and
5910 since from GDB's perspective all threads should be running, it
5913 Finally, special care must also be given to handling fork/vfork
5914 events. A (v)fork event actually tells us that two processes
5915 stopped -- the parent and the child. Until we follow the fork,
5916 we must not resume the child. Therefore, if we have a pending
5917 fork follow, we must not send a global wildcard resume action
5918 (vCont;c). We can still send process-wide wildcards though. */
5920 /* Start by assuming a global wildcard (vCont;c) is possible. */
5921 may_global_wildcard_vcont
= 1;
5923 /* And assume every process is individually wildcard-able too. */
5924 ALL_NON_EXITED_INFERIORS (inf
)
5926 remote_inferior
*priv
= get_remote_inferior (inf
);
5928 priv
->may_wildcard_vcont
= true;
5931 /* Check for any pending events (not reported or processed yet) and
5932 disable process and global wildcard resumes appropriately. */
5933 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
5935 ALL_NON_EXITED_THREADS (tp
)
5937 /* If a thread of a process is not meant to be resumed, then we
5938 can't wildcard that process. */
5941 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
5943 /* And if we can't wildcard a process, we can't wildcard
5944 everything either. */
5945 may_global_wildcard_vcont
= 0;
5949 /* If a thread is the parent of an unfollowed fork, then we
5950 can't do a global wildcard, as that would resume the fork
5952 if (is_pending_fork_parent_thread (tp
))
5953 may_global_wildcard_vcont
= 0;
5956 /* Now let's build the vCont packet(s). Actions must be appended
5957 from narrower to wider scopes (thread -> process -> global). If
5958 we end up with too many actions for a single packet vcont_builder
5959 flushes the current vCont packet to the remote side and starts a
5961 vcont_builder_restart (&vcont_builder
);
5963 /* Threads first. */
5964 ALL_NON_EXITED_THREADS (tp
)
5966 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
5968 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
5971 gdb_assert (!thread_is_in_step_over_chain (tp
));
5973 if (!remote_thr
->last_resume_step
5974 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
5975 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
5977 /* We'll send a wildcard resume instead. */
5978 remote_thr
->vcont_resumed
= 1;
5982 vcont_builder_push_action (&vcont_builder
, tp
->ptid
,
5983 remote_thr
->last_resume_step
,
5984 remote_thr
->last_resume_sig
);
5985 remote_thr
->vcont_resumed
= 1;
5988 /* Now check whether we can send any process-wide wildcard. This is
5989 to avoid sending a global wildcard in the case nothing is
5990 supposed to be resumed. */
5991 any_process_wildcard
= 0;
5993 ALL_NON_EXITED_INFERIORS (inf
)
5995 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
5997 any_process_wildcard
= 1;
6002 if (any_process_wildcard
)
6004 /* If all processes are wildcard-able, then send a single "c"
6005 action, otherwise, send an "all (-1) threads of process"
6006 continue action for each running process, if any. */
6007 if (may_global_wildcard_vcont
)
6009 vcont_builder_push_action (&vcont_builder
, minus_one_ptid
,
6014 ALL_NON_EXITED_INFERIORS (inf
)
6016 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6018 vcont_builder_push_action (&vcont_builder
,
6019 pid_to_ptid (inf
->pid
),
6026 vcont_builder_flush (&vcont_builder
);
6031 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6032 thread, all threads of a remote process, or all threads of all
6036 remote_stop_ns (ptid_t ptid
)
6038 struct remote_state
*rs
= get_remote_state ();
6040 char *endp
= rs
->buf
+ get_remote_packet_size ();
6042 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6043 remote_vcont_probe (rs
);
6045 if (!rs
->supports_vCont
.t
)
6046 error (_("Remote server does not support stopping threads"));
6048 if (ptid_equal (ptid
, minus_one_ptid
)
6049 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
6050 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6055 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6057 if (ptid_is_pid (ptid
))
6058 /* All (-1) threads of process. */
6059 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
6062 /* Small optimization: if we already have a stop reply for
6063 this thread, no use in telling the stub we want this
6065 if (peek_stop_reply (ptid
))
6071 write_ptid (p
, endp
, nptid
);
6074 /* In non-stop, we get an immediate OK reply. The stop reply will
6075 come in asynchronously by notification. */
6077 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6078 if (strcmp (rs
->buf
, "OK") != 0)
6079 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6082 /* All-stop version of target_interrupt. Sends a break or a ^C to
6083 interrupt the remote target. It is undefined which thread of which
6084 process reports the interrupt. */
6087 remote_interrupt_as (void)
6089 struct remote_state
*rs
= get_remote_state ();
6091 rs
->ctrlc_pending_p
= 1;
6093 /* If the inferior is stopped already, but the core didn't know
6094 about it yet, just ignore the request. The cached wait status
6095 will be collected in remote_wait. */
6096 if (rs
->cached_wait_status
)
6099 /* Send interrupt_sequence to remote target. */
6100 send_interrupt_sequence ();
6103 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6104 the remote target. It is undefined which thread of which process
6105 reports the interrupt. Throws an error if the packet is not
6106 supported by the server. */
6109 remote_interrupt_ns (void)
6111 struct remote_state
*rs
= get_remote_state ();
6113 char *endp
= rs
->buf
+ get_remote_packet_size ();
6115 xsnprintf (p
, endp
- p
, "vCtrlC");
6117 /* In non-stop, we get an immediate OK reply. The stop reply will
6118 come in asynchronously by notification. */
6120 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6122 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6126 case PACKET_UNKNOWN
:
6127 error (_("No support for interrupting the remote target."));
6129 error (_("Interrupting target failed: %s"), rs
->buf
);
6133 /* Implement the to_stop function for the remote targets. */
6136 remote_stop (struct target_ops
*self
, ptid_t ptid
)
6139 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6141 if (target_is_non_stop_p ())
6142 remote_stop_ns (ptid
);
6145 /* We don't currently have a way to transparently pause the
6146 remote target in all-stop mode. Interrupt it instead. */
6147 remote_interrupt_as ();
6151 /* Implement the to_interrupt function for the remote targets. */
6154 remote_interrupt (struct target_ops
*self
)
6157 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6159 if (target_is_non_stop_p ())
6160 remote_interrupt_ns ();
6162 remote_interrupt_as ();
6165 /* Implement the to_pass_ctrlc function for the remote targets. */
6168 remote_pass_ctrlc (struct target_ops
*self
)
6170 struct remote_state
*rs
= get_remote_state ();
6173 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6175 /* If we're starting up, we're not fully synced yet. Quit
6177 if (rs
->starting_up
)
6179 /* If ^C has already been sent once, offer to disconnect. */
6180 else if (rs
->ctrlc_pending_p
)
6183 target_interrupt ();
6186 /* Ask the user what to do when an interrupt is received. */
6189 interrupt_query (void)
6191 struct remote_state
*rs
= get_remote_state ();
6193 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6195 if (query (_("The target is not responding to interrupt requests.\n"
6196 "Stop debugging it? ")))
6198 remote_unpush_target ();
6199 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6204 if (query (_("Interrupted while waiting for the program.\n"
6205 "Give up waiting? ")))
6210 /* Enable/disable target terminal ownership. Most targets can use
6211 terminal groups to control terminal ownership. Remote targets are
6212 different in that explicit transfer of ownership to/from GDB/target
6216 remote_terminal_inferior (struct target_ops
*self
)
6218 /* NOTE: At this point we could also register our selves as the
6219 recipient of all input. Any characters typed could then be
6220 passed on down to the target. */
6224 remote_terminal_ours (struct target_ops
*self
)
6229 remote_console_output (char *msg
)
6233 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6236 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6240 fputs_unfiltered (tb
, gdb_stdtarg
);
6242 gdb_flush (gdb_stdtarg
);
6245 DEF_VEC_O(cached_reg_t
);
6247 typedef struct stop_reply
6249 struct notif_event base
;
6251 /* The identifier of the thread about this event */
6254 /* The remote state this event is associated with. When the remote
6255 connection, represented by a remote_state object, is closed,
6256 all the associated stop_reply events should be released. */
6257 struct remote_state
*rs
;
6259 struct target_waitstatus ws
;
6261 /* The architecture associated with the expedited registers. */
6264 /* Expedited registers. This makes remote debugging a bit more
6265 efficient for those targets that provide critical registers as
6266 part of their normal status mechanism (as another roundtrip to
6267 fetch them is avoided). */
6268 VEC(cached_reg_t
) *regcache
;
6270 enum target_stop_reason stop_reason
;
6272 CORE_ADDR watch_data_address
;
6277 DECLARE_QUEUE_P (stop_reply_p
);
6278 DEFINE_QUEUE_P (stop_reply_p
);
6279 /* The list of already fetched and acknowledged stop events. This
6280 queue is used for notification Stop, and other notifications
6281 don't need queue for their events, because the notification events
6282 of Stop can't be consumed immediately, so that events should be
6283 queued first, and be consumed by remote_wait_{ns,as} one per
6284 time. Other notifications can consume their events immediately,
6285 so queue is not needed for them. */
6286 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6289 stop_reply_xfree (struct stop_reply
*r
)
6291 notif_event_xfree ((struct notif_event
*) r
);
6294 /* Return the length of the stop reply queue. */
6297 stop_reply_queue_length (void)
6299 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6303 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6304 struct notif_event
*event
)
6306 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6310 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6311 struct notif_event
*event
)
6313 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6316 putpkt (self
->ack_command
);
6318 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6319 /* We got an unknown stop reply. */
6320 error (_("Unknown stop reply"));
6322 push_stop_reply (stop_reply
);
6326 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6328 /* We can't get pending events in remote_notif_process for
6329 notification stop, and we have to do this in remote_wait_ns
6330 instead. If we fetch all queued events from stub, remote stub
6331 may exit and we have no chance to process them back in
6333 mark_async_event_handler (remote_async_inferior_event_token
);
6338 stop_reply_dtr (struct notif_event
*event
)
6340 struct stop_reply
*r
= (struct stop_reply
*) event
;
6345 VEC_iterate (cached_reg_t
, r
->regcache
, ix
, reg
);
6349 VEC_free (cached_reg_t
, r
->regcache
);
6352 static struct notif_event
*
6353 remote_notif_stop_alloc_reply (void)
6355 /* We cast to a pointer to the "base class". */
6356 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6358 r
->dtr
= stop_reply_dtr
;
6363 /* A client of notification Stop. */
6365 struct notif_client notif_client_stop
=
6369 remote_notif_stop_parse
,
6370 remote_notif_stop_ack
,
6371 remote_notif_stop_can_get_pending_events
,
6372 remote_notif_stop_alloc_reply
,
6376 /* A parameter to pass data in and out. */
6378 struct queue_iter_param
6381 struct stop_reply
*output
;
6384 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6385 the pid of the process that owns the threads we want to check, or
6386 -1 if we want to check all threads. */
6389 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6392 if (ws
->kind
== TARGET_WAITKIND_FORKED
6393 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6395 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6402 /* Return the thread's pending status used to determine whether the
6403 thread is a fork parent stopped at a fork event. */
6405 static struct target_waitstatus
*
6406 thread_pending_fork_status (struct thread_info
*thread
)
6408 if (thread
->suspend
.waitstatus_pending_p
)
6409 return &thread
->suspend
.waitstatus
;
6411 return &thread
->pending_follow
;
6414 /* Determine if THREAD is a pending fork parent thread. */
6417 is_pending_fork_parent_thread (struct thread_info
*thread
)
6419 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6422 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6425 /* Check whether EVENT is a fork event, and if it is, remove the
6426 fork child from the context list passed in DATA. */
6429 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6430 QUEUE_ITER (stop_reply_p
) *iter
,
6434 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6435 struct threads_listing_context
*context
6436 = (struct threads_listing_context
*) param
->input
;
6438 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6439 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6440 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6441 context
->remove_thread (event
->ws
.value
.related_pid
);
6446 /* If CONTEXT contains any fork child threads that have not been
6447 reported yet, remove them from the CONTEXT list. If such a
6448 thread exists it is because we are stopped at a fork catchpoint
6449 and have not yet called follow_fork, which will set up the
6450 host-side data structures for the new process. */
6453 remove_new_fork_children (struct threads_listing_context
*context
)
6455 struct thread_info
* thread
;
6457 struct notif_client
*notif
= ¬if_client_stop
;
6458 struct queue_iter_param param
;
6460 /* For any threads stopped at a fork event, remove the corresponding
6461 fork child threads from the CONTEXT list. */
6462 ALL_NON_EXITED_THREADS (thread
)
6464 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6466 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6467 context
->remove_thread (ws
->value
.related_pid
);
6470 /* Check for any pending fork events (not reported or processed yet)
6471 in process PID and remove those fork child threads from the
6472 CONTEXT list as well. */
6473 remote_notif_get_pending_events (notif
);
6474 param
.input
= context
;
6475 param
.output
= NULL
;
6476 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6477 remove_child_of_pending_fork
, ¶m
);
6480 /* Check whether EVENT would prevent a global or process wildcard
6484 check_pending_event_prevents_wildcard_vcont_callback
6485 (QUEUE (stop_reply_p
) *q
,
6486 QUEUE_ITER (stop_reply_p
) *iter
,
6490 struct inferior
*inf
;
6491 int *may_global_wildcard_vcont
= (int *) data
;
6493 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6494 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6497 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6498 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6499 *may_global_wildcard_vcont
= 0;
6501 inf
= find_inferior_ptid (event
->ptid
);
6503 /* This may be the first time we heard about this process.
6504 Regardless, we must not do a global wildcard resume, otherwise
6505 we'd resume this process too. */
6506 *may_global_wildcard_vcont
= 0;
6508 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
6513 /* Check whether any event pending in the vStopped queue would prevent
6514 a global or process wildcard vCont action. Clear
6515 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6516 and clear the event inferior's may_wildcard_vcont flag if we can't
6517 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6520 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard
)
6522 struct notif_client
*notif
= ¬if_client_stop
;
6524 remote_notif_get_pending_events (notif
);
6525 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6526 check_pending_event_prevents_wildcard_vcont_callback
,
6527 may_global_wildcard
);
6530 /* Remove stop replies in the queue if its pid is equal to the given
6534 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6535 QUEUE_ITER (stop_reply_p
) *iter
,
6539 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6540 struct inferior
*inf
= (struct inferior
*) param
->input
;
6542 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6544 stop_reply_xfree (event
);
6545 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6551 /* Discard all pending stop replies of inferior INF. */
6554 discard_pending_stop_replies (struct inferior
*inf
)
6556 struct queue_iter_param param
;
6557 struct stop_reply
*reply
;
6558 struct remote_state
*rs
= get_remote_state ();
6559 struct remote_notif_state
*rns
= rs
->notif_state
;
6561 /* This function can be notified when an inferior exists. When the
6562 target is not remote, the notification state is NULL. */
6563 if (rs
->remote_desc
== NULL
)
6566 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6568 /* Discard the in-flight notification. */
6569 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6571 stop_reply_xfree (reply
);
6572 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6576 param
.output
= NULL
;
6577 /* Discard the stop replies we have already pulled with
6579 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6580 remove_stop_reply_for_inferior
, ¶m
);
6583 /* If its remote state is equal to the given remote state,
6584 remove EVENT from the stop reply queue. */
6587 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6588 QUEUE_ITER (stop_reply_p
) *iter
,
6592 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6593 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6595 if (event
->rs
== rs
)
6597 stop_reply_xfree (event
);
6598 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6604 /* Discard the stop replies for RS in stop_reply_queue. */
6607 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6609 struct queue_iter_param param
;
6612 param
.output
= NULL
;
6613 /* Discard the stop replies we have already pulled with
6615 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6616 remove_stop_reply_of_remote_state
, ¶m
);
6619 /* A parameter to pass data in and out. */
6622 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6623 QUEUE_ITER (stop_reply_p
) *iter
,
6627 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6628 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6630 if (ptid_match (event
->ptid
, *ptid
))
6632 param
->output
= event
;
6633 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6640 /* Remove the first reply in 'stop_reply_queue' which matches
6643 static struct stop_reply
*
6644 remote_notif_remove_queued_reply (ptid_t ptid
)
6646 struct queue_iter_param param
;
6648 param
.input
= &ptid
;
6649 param
.output
= NULL
;
6651 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6652 remote_notif_remove_once_on_match
, ¶m
);
6654 fprintf_unfiltered (gdb_stdlog
,
6655 "notif: discard queued event: 'Stop' in %s\n",
6656 target_pid_to_str (ptid
));
6658 return param
.output
;
6661 /* Look for a queued stop reply belonging to PTID. If one is found,
6662 remove it from the queue, and return it. Returns NULL if none is
6663 found. If there are still queued events left to process, tell the
6664 event loop to get back to target_wait soon. */
6666 static struct stop_reply
*
6667 queued_stop_reply (ptid_t ptid
)
6669 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6671 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6672 /* There's still at least an event left. */
6673 mark_async_event_handler (remote_async_inferior_event_token
);
6678 /* Push a fully parsed stop reply in the stop reply queue. Since we
6679 know that we now have at least one queued event left to pass to the
6680 core side, tell the event loop to get back to target_wait soon. */
6683 push_stop_reply (struct stop_reply
*new_event
)
6685 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6688 fprintf_unfiltered (gdb_stdlog
,
6689 "notif: push 'Stop' %s to queue %d\n",
6690 target_pid_to_str (new_event
->ptid
),
6691 QUEUE_length (stop_reply_p
,
6694 mark_async_event_handler (remote_async_inferior_event_token
);
6698 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6699 QUEUE_ITER (stop_reply_p
) *iter
,
6700 struct stop_reply
*event
,
6703 ptid_t
*ptid
= (ptid_t
*) data
;
6705 return !(ptid_equal (*ptid
, event
->ptid
)
6706 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6709 /* Returns true if we have a stop reply for PTID. */
6712 peek_stop_reply (ptid_t ptid
)
6714 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6715 stop_reply_match_ptid_and_ws
, &ptid
);
6718 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6719 starting with P and ending with PEND matches PREFIX. */
6722 strprefix (const char *p
, const char *pend
, const char *prefix
)
6724 for ( ; p
< pend
; p
++, prefix
++)
6727 return *prefix
== '\0';
6730 /* Parse the stop reply in BUF. Either the function succeeds, and the
6731 result is stored in EVENT, or throws an error. */
6734 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6736 remote_arch_state
*rsa
= NULL
;
6741 event
->ptid
= null_ptid
;
6742 event
->rs
= get_remote_state ();
6743 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6744 event
->ws
.value
.integer
= 0;
6745 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6746 event
->regcache
= NULL
;
6751 case 'T': /* Status with PC, SP, FP, ... */
6752 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6753 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6755 n... = register number
6756 r... = register contents
6759 p
= &buf
[3]; /* after Txx */
6765 p1
= strchr (p
, ':');
6767 error (_("Malformed packet(a) (missing colon): %s\n\
6771 error (_("Malformed packet(a) (missing register number): %s\n\
6775 /* Some "registers" are actually extended stop information.
6776 Note if you're adding a new entry here: GDB 7.9 and
6777 earlier assume that all register "numbers" that start
6778 with an hex digit are real register numbers. Make sure
6779 the server only sends such a packet if it knows the
6780 client understands it. */
6782 if (strprefix (p
, p1
, "thread"))
6783 event
->ptid
= read_ptid (++p1
, &p
);
6784 else if (strprefix (p
, p1
, "syscall_entry"))
6788 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6789 p
= unpack_varlen_hex (++p1
, &sysno
);
6790 event
->ws
.value
.syscall_number
= (int) sysno
;
6792 else if (strprefix (p
, p1
, "syscall_return"))
6796 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6797 p
= unpack_varlen_hex (++p1
, &sysno
);
6798 event
->ws
.value
.syscall_number
= (int) sysno
;
6800 else if (strprefix (p
, p1
, "watch")
6801 || strprefix (p
, p1
, "rwatch")
6802 || strprefix (p
, p1
, "awatch"))
6804 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6805 p
= unpack_varlen_hex (++p1
, &addr
);
6806 event
->watch_data_address
= (CORE_ADDR
) addr
;
6808 else if (strprefix (p
, p1
, "swbreak"))
6810 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6812 /* Make sure the stub doesn't forget to indicate support
6814 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6815 error (_("Unexpected swbreak stop reason"));
6817 /* The value part is documented as "must be empty",
6818 though we ignore it, in case we ever decide to make
6819 use of it in a backward compatible way. */
6820 p
= strchrnul (p1
+ 1, ';');
6822 else if (strprefix (p
, p1
, "hwbreak"))
6824 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6826 /* Make sure the stub doesn't forget to indicate support
6828 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6829 error (_("Unexpected hwbreak stop reason"));
6832 p
= strchrnul (p1
+ 1, ';');
6834 else if (strprefix (p
, p1
, "library"))
6836 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6837 p
= strchrnul (p1
+ 1, ';');
6839 else if (strprefix (p
, p1
, "replaylog"))
6841 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6842 /* p1 will indicate "begin" or "end", but it makes
6843 no difference for now, so ignore it. */
6844 p
= strchrnul (p1
+ 1, ';');
6846 else if (strprefix (p
, p1
, "core"))
6850 p
= unpack_varlen_hex (++p1
, &c
);
6853 else if (strprefix (p
, p1
, "fork"))
6855 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6856 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6858 else if (strprefix (p
, p1
, "vfork"))
6860 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6861 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6863 else if (strprefix (p
, p1
, "vforkdone"))
6865 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6866 p
= strchrnul (p1
+ 1, ';');
6868 else if (strprefix (p
, p1
, "exec"))
6871 char pathname
[PATH_MAX
];
6874 /* Determine the length of the execd pathname. */
6875 p
= unpack_varlen_hex (++p1
, &ignored
);
6876 pathlen
= (p
- p1
) / 2;
6878 /* Save the pathname for event reporting and for
6879 the next run command. */
6880 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6881 pathname
[pathlen
] = '\0';
6883 /* This is freed during event handling. */
6884 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6885 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6887 /* Skip the registers included in this packet, since
6888 they may be for an architecture different from the
6889 one used by the original program. */
6892 else if (strprefix (p
, p1
, "create"))
6894 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
6895 p
= strchrnul (p1
+ 1, ';');
6904 p
= strchrnul (p1
+ 1, ';');
6909 /* Maybe a real ``P'' register number. */
6910 p_temp
= unpack_varlen_hex (p
, &pnum
);
6911 /* If the first invalid character is the colon, we got a
6912 register number. Otherwise, it's an unknown stop
6916 /* If we haven't parsed the event's thread yet, find
6917 it now, in order to find the architecture of the
6918 reported expedited registers. */
6919 if (event
->ptid
== null_ptid
)
6921 const char *thr
= strstr (p1
+ 1, ";thread:");
6923 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
6927 /* Either the current thread hasn't changed,
6928 or the inferior is not multi-threaded.
6929 The event must be for the thread we last
6930 set as (or learned as being) current. */
6931 event
->ptid
= event
->rs
->general_thread
;
6937 inferior
*inf
= (event
->ptid
== null_ptid
6939 : find_inferior_ptid (event
->ptid
));
6940 /* If this is the first time we learn anything
6941 about this process, skip the registers
6942 included in this packet, since we don't yet
6943 know which architecture to use to parse them.
6944 We'll determine the architecture later when
6945 we process the stop reply and retrieve the
6946 target description, via
6947 remote_notice_new_inferior ->
6948 post_create_inferior. */
6951 p
= strchrnul (p1
+ 1, ';');
6956 event
->arch
= inf
->gdbarch
;
6957 rsa
= get_remote_arch_state (event
->arch
);
6961 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
6962 cached_reg_t cached_reg
;
6965 error (_("Remote sent bad register number %s: %s\n\
6967 hex_string (pnum
), p
, buf
);
6969 cached_reg
.num
= reg
->regnum
;
6970 cached_reg
.data
= (gdb_byte
*)
6971 xmalloc (register_size (event
->arch
, reg
->regnum
));
6974 fieldsize
= hex2bin (p
, cached_reg
.data
,
6975 register_size (event
->arch
, reg
->regnum
));
6977 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
6978 warning (_("Remote reply is too short: %s"), buf
);
6980 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
6984 /* Not a number. Silently skip unknown optional
6986 p
= strchrnul (p1
+ 1, ';');
6991 error (_("Remote register badly formatted: %s\nhere: %s"),
6996 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7000 case 'S': /* Old style status, just signal only. */
7004 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7005 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7006 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7007 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7009 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7012 case 'w': /* Thread exited. */
7017 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7018 p
= unpack_varlen_hex (&buf
[1], &value
);
7019 event
->ws
.value
.integer
= value
;
7021 error (_("stop reply packet badly formatted: %s"), buf
);
7022 event
->ptid
= read_ptid (++p
, NULL
);
7025 case 'W': /* Target exited. */
7032 /* GDB used to accept only 2 hex chars here. Stubs should
7033 only send more if they detect GDB supports multi-process
7035 p
= unpack_varlen_hex (&buf
[1], &value
);
7039 /* The remote process exited. */
7040 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7041 event
->ws
.value
.integer
= value
;
7045 /* The remote process exited with a signal. */
7046 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7047 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7048 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7050 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7053 /* If no process is specified, assume inferior_ptid. */
7054 pid
= ptid_get_pid (inferior_ptid
);
7063 else if (startswith (p
, "process:"))
7067 p
+= sizeof ("process:") - 1;
7068 unpack_varlen_hex (p
, &upid
);
7072 error (_("unknown stop reply packet: %s"), buf
);
7075 error (_("unknown stop reply packet: %s"), buf
);
7076 event
->ptid
= pid_to_ptid (pid
);
7080 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7081 event
->ptid
= minus_one_ptid
;
7085 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
7086 error (_("No process or thread specified in stop reply: %s"), buf
);
7089 /* When the stub wants to tell GDB about a new notification reply, it
7090 sends a notification (%Stop, for example). Those can come it at
7091 any time, hence, we have to make sure that any pending
7092 putpkt/getpkt sequence we're making is finished, before querying
7093 the stub for more events with the corresponding ack command
7094 (vStopped, for example). E.g., if we started a vStopped sequence
7095 immediately upon receiving the notification, something like this
7103 1.6) <-- (registers reply to step #1.3)
7105 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7108 To solve this, whenever we parse a %Stop notification successfully,
7109 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7110 doing whatever we were doing:
7116 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7117 2.5) <-- (registers reply to step #2.3)
7119 Eventualy after step #2.5, we return to the event loop, which
7120 notices there's an event on the
7121 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7122 associated callback --- the function below. At this point, we're
7123 always safe to start a vStopped sequence. :
7126 2.7) <-- T05 thread:2
7132 remote_notif_get_pending_events (struct notif_client
*nc
)
7134 struct remote_state
*rs
= get_remote_state ();
7136 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7139 fprintf_unfiltered (gdb_stdlog
,
7140 "notif: process: '%s' ack pending event\n",
7144 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7145 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7149 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7150 if (strcmp (rs
->buf
, "OK") == 0)
7153 remote_notif_ack (nc
, rs
->buf
);
7159 fprintf_unfiltered (gdb_stdlog
,
7160 "notif: process: '%s' no pending reply\n",
7165 /* Called when it is decided that STOP_REPLY holds the info of the
7166 event that is to be returned to the core. This function always
7167 destroys STOP_REPLY. */
7170 process_stop_reply (struct stop_reply
*stop_reply
,
7171 struct target_waitstatus
*status
)
7175 *status
= stop_reply
->ws
;
7176 ptid
= stop_reply
->ptid
;
7178 /* If no thread/process was reported by the stub, assume the current
7180 if (ptid_equal (ptid
, null_ptid
))
7181 ptid
= inferior_ptid
;
7183 if (status
->kind
!= TARGET_WAITKIND_EXITED
7184 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7185 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7187 /* Expedited registers. */
7188 if (stop_reply
->regcache
)
7190 struct regcache
*regcache
7191 = get_thread_arch_regcache (ptid
, stop_reply
->arch
);
7196 VEC_iterate (cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7199 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
7203 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7206 remote_notice_new_inferior (ptid
, 0);
7207 remote_thread_info
*remote_thr
= get_remote_thread_info (ptid
);
7208 remote_thr
->core
= stop_reply
->core
;
7209 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7210 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7211 remote_thr
->vcont_resumed
= 0;
7214 stop_reply_xfree (stop_reply
);
7218 /* The non-stop mode version of target_wait. */
7221 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7223 struct remote_state
*rs
= get_remote_state ();
7224 struct stop_reply
*stop_reply
;
7228 /* If in non-stop mode, get out of getpkt even if a
7229 notification is received. */
7231 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7232 0 /* forever */, &is_notif
);
7235 if (ret
!= -1 && !is_notif
)
7238 case 'E': /* Error of some sort. */
7239 /* We're out of sync with the target now. Did it continue
7240 or not? We can't tell which thread it was in non-stop,
7241 so just ignore this. */
7242 warning (_("Remote failure reply: %s"), rs
->buf
);
7244 case 'O': /* Console output. */
7245 remote_console_output (rs
->buf
+ 1);
7248 warning (_("Invalid remote reply: %s"), rs
->buf
);
7252 /* Acknowledge a pending stop reply that may have arrived in the
7254 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7255 remote_notif_get_pending_events (¬if_client_stop
);
7257 /* If indeed we noticed a stop reply, we're done. */
7258 stop_reply
= queued_stop_reply (ptid
);
7259 if (stop_reply
!= NULL
)
7260 return process_stop_reply (stop_reply
, status
);
7262 /* Still no event. If we're just polling for an event, then
7263 return to the event loop. */
7264 if (options
& TARGET_WNOHANG
)
7266 status
->kind
= TARGET_WAITKIND_IGNORE
;
7267 return minus_one_ptid
;
7270 /* Otherwise do a blocking wait. */
7271 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7272 1 /* forever */, &is_notif
);
7276 /* Wait until the remote machine stops, then return, storing status in
7277 STATUS just as `wait' would. */
7280 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7282 struct remote_state
*rs
= get_remote_state ();
7283 ptid_t event_ptid
= null_ptid
;
7285 struct stop_reply
*stop_reply
;
7289 status
->kind
= TARGET_WAITKIND_IGNORE
;
7290 status
->value
.integer
= 0;
7292 stop_reply
= queued_stop_reply (ptid
);
7293 if (stop_reply
!= NULL
)
7294 return process_stop_reply (stop_reply
, status
);
7296 if (rs
->cached_wait_status
)
7297 /* Use the cached wait status, but only once. */
7298 rs
->cached_wait_status
= 0;
7303 int forever
= ((options
& TARGET_WNOHANG
) == 0
7304 && wait_forever_enabled_p
);
7306 if (!rs
->waiting_for_stop_reply
)
7308 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7309 return minus_one_ptid
;
7312 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7313 _never_ wait for ever -> test on target_is_async_p().
7314 However, before we do that we need to ensure that the caller
7315 knows how to take the target into/out of async mode. */
7316 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7317 forever
, &is_notif
);
7319 /* GDB gets a notification. Return to core as this event is
7321 if (ret
!= -1 && is_notif
)
7322 return minus_one_ptid
;
7324 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7325 return minus_one_ptid
;
7330 /* Assume that the target has acknowledged Ctrl-C unless we receive
7331 an 'F' or 'O' packet. */
7332 if (buf
[0] != 'F' && buf
[0] != 'O')
7333 rs
->ctrlc_pending_p
= 0;
7337 case 'E': /* Error of some sort. */
7338 /* We're out of sync with the target now. Did it continue or
7339 not? Not is more likely, so report a stop. */
7340 rs
->waiting_for_stop_reply
= 0;
7342 warning (_("Remote failure reply: %s"), buf
);
7343 status
->kind
= TARGET_WAITKIND_STOPPED
;
7344 status
->value
.sig
= GDB_SIGNAL_0
;
7346 case 'F': /* File-I/O request. */
7347 /* GDB may access the inferior memory while handling the File-I/O
7348 request, but we don't want GDB accessing memory while waiting
7349 for a stop reply. See the comments in putpkt_binary. Set
7350 waiting_for_stop_reply to 0 temporarily. */
7351 rs
->waiting_for_stop_reply
= 0;
7352 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7353 rs
->ctrlc_pending_p
= 0;
7354 /* GDB handled the File-I/O request, and the target is running
7355 again. Keep waiting for events. */
7356 rs
->waiting_for_stop_reply
= 1;
7358 case 'N': case 'T': case 'S': case 'X': case 'W':
7360 struct stop_reply
*stop_reply
;
7362 /* There is a stop reply to handle. */
7363 rs
->waiting_for_stop_reply
= 0;
7366 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7369 event_ptid
= process_stop_reply (stop_reply
, status
);
7372 case 'O': /* Console output. */
7373 remote_console_output (buf
+ 1);
7376 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7378 /* Zero length reply means that we tried 'S' or 'C' and the
7379 remote system doesn't support it. */
7380 target_terminal::ours_for_output ();
7382 ("Can't send signals to this remote system. %s not sent.\n",
7383 gdb_signal_to_name (rs
->last_sent_signal
));
7384 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7385 target_terminal::inferior ();
7387 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7391 /* else fallthrough */
7393 warning (_("Invalid remote reply: %s"), buf
);
7397 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7398 return minus_one_ptid
;
7399 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7401 /* Nothing interesting happened. If we're doing a non-blocking
7402 poll, we're done. Otherwise, go back to waiting. */
7403 if (options
& TARGET_WNOHANG
)
7404 return minus_one_ptid
;
7408 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7409 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7411 if (!ptid_equal (event_ptid
, null_ptid
))
7412 record_currthread (rs
, event_ptid
);
7414 event_ptid
= inferior_ptid
;
7417 /* A process exit. Invalidate our notion of current thread. */
7418 record_currthread (rs
, minus_one_ptid
);
7423 /* Wait until the remote machine stops, then return, storing status in
7424 STATUS just as `wait' would. */
7427 remote_wait (struct target_ops
*ops
,
7428 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7432 if (target_is_non_stop_p ())
7433 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7435 event_ptid
= remote_wait_as (ptid
, status
, options
);
7437 if (target_is_async_p ())
7439 /* If there are are events left in the queue tell the event loop
7441 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7442 mark_async_event_handler (remote_async_inferior_event_token
);
7448 /* Fetch a single register using a 'p' packet. */
7451 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7453 struct gdbarch
*gdbarch
= regcache
->arch ();
7454 struct remote_state
*rs
= get_remote_state ();
7456 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7459 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7462 if (reg
->pnum
== -1)
7467 p
+= hexnumstr (p
, reg
->pnum
);
7470 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7474 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7478 case PACKET_UNKNOWN
:
7481 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7482 gdbarch_register_name (regcache
->arch (),
7487 /* If this register is unfetchable, tell the regcache. */
7490 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7494 /* Otherwise, parse and supply the value. */
7500 error (_("fetch_register_using_p: early buf termination"));
7502 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7505 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7509 /* Fetch the registers included in the target's 'g' packet. */
7512 send_g_packet (void)
7514 struct remote_state
*rs
= get_remote_state ();
7517 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7518 remote_send (&rs
->buf
, &rs
->buf_size
);
7520 /* We can get out of synch in various cases. If the first character
7521 in the buffer is not a hex character, assume that has happened
7522 and try to fetch another packet to read. */
7523 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7524 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7525 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7526 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7529 fprintf_unfiltered (gdb_stdlog
,
7530 "Bad register packet; fetching a new packet\n");
7531 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7534 buf_len
= strlen (rs
->buf
);
7536 /* Sanity check the received packet. */
7537 if (buf_len
% 2 != 0)
7538 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7544 process_g_packet (struct regcache
*regcache
)
7546 struct gdbarch
*gdbarch
= regcache
->arch ();
7547 struct remote_state
*rs
= get_remote_state ();
7548 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7553 buf_len
= strlen (rs
->buf
);
7555 /* Further sanity checks, with knowledge of the architecture. */
7556 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7557 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7558 "bytes): %s"), rsa
->sizeof_g_packet
, buf_len
/ 2, rs
->buf
);
7560 /* Save the size of the packet sent to us by the target. It is used
7561 as a heuristic when determining the max size of packets that the
7562 target can safely receive. */
7563 if (rsa
->actual_register_packet_size
== 0)
7564 rsa
->actual_register_packet_size
= buf_len
;
7566 /* If this is smaller than we guessed the 'g' packet would be,
7567 update our records. A 'g' reply that doesn't include a register's
7568 value implies either that the register is not available, or that
7569 the 'p' packet must be used. */
7570 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7572 long sizeof_g_packet
= buf_len
/ 2;
7574 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7576 long offset
= rsa
->regs
[i
].offset
;
7577 long reg_size
= register_size (gdbarch
, i
);
7579 if (rsa
->regs
[i
].pnum
== -1)
7582 if (offset
>= sizeof_g_packet
)
7583 rsa
->regs
[i
].in_g_packet
= 0;
7584 else if (offset
+ reg_size
> sizeof_g_packet
)
7585 error (_("Truncated register %d in remote 'g' packet"), i
);
7587 rsa
->regs
[i
].in_g_packet
= 1;
7590 /* Looks valid enough, we can assume this is the correct length
7591 for a 'g' packet. It's important not to adjust
7592 rsa->sizeof_g_packet if we have truncated registers otherwise
7593 this "if" won't be run the next time the method is called
7594 with a packet of the same size and one of the internal errors
7595 below will trigger instead. */
7596 rsa
->sizeof_g_packet
= sizeof_g_packet
;
7599 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7601 /* Unimplemented registers read as all bits zero. */
7602 memset (regs
, 0, rsa
->sizeof_g_packet
);
7604 /* Reply describes registers byte by byte, each byte encoded as two
7605 hex characters. Suck them all up, then supply them to the
7606 register cacheing/storage mechanism. */
7609 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7611 if (p
[0] == 0 || p
[1] == 0)
7612 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7613 internal_error (__FILE__
, __LINE__
,
7614 _("unexpected end of 'g' packet reply"));
7616 if (p
[0] == 'x' && p
[1] == 'x')
7617 regs
[i
] = 0; /* 'x' */
7619 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7623 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7625 struct packet_reg
*r
= &rsa
->regs
[i
];
7626 long reg_size
= register_size (gdbarch
, i
);
7630 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
7631 /* This shouldn't happen - we adjusted in_g_packet above. */
7632 internal_error (__FILE__
, __LINE__
,
7633 _("unexpected end of 'g' packet reply"));
7634 else if (rs
->buf
[r
->offset
* 2] == 'x')
7636 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7637 /* The register isn't available, mark it as such (at
7638 the same time setting the value to zero). */
7639 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7642 regcache_raw_supply (regcache
, r
->regnum
,
7649 fetch_registers_using_g (struct regcache
*regcache
)
7652 process_g_packet (regcache
);
7655 /* Make the remote selected traceframe match GDB's selected
7659 set_remote_traceframe (void)
7662 struct remote_state
*rs
= get_remote_state ();
7664 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7667 /* Avoid recursion, remote_trace_find calls us again. */
7668 rs
->remote_traceframe_number
= get_traceframe_number ();
7670 newnum
= target_trace_find (tfind_number
,
7671 get_traceframe_number (), 0, 0, NULL
);
7673 /* Should not happen. If it does, all bets are off. */
7674 if (newnum
!= get_traceframe_number ())
7675 warning (_("could not set remote traceframe"));
7679 remote_fetch_registers (struct target_ops
*ops
,
7680 struct regcache
*regcache
, int regnum
)
7682 struct gdbarch
*gdbarch
= regcache
->arch ();
7683 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7686 set_remote_traceframe ();
7687 set_general_thread (regcache_get_ptid (regcache
));
7691 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7693 gdb_assert (reg
!= NULL
);
7695 /* If this register might be in the 'g' packet, try that first -
7696 we are likely to read more than one register. If this is the
7697 first 'g' packet, we might be overly optimistic about its
7698 contents, so fall back to 'p'. */
7699 if (reg
->in_g_packet
)
7701 fetch_registers_using_g (regcache
);
7702 if (reg
->in_g_packet
)
7706 if (fetch_register_using_p (regcache
, reg
))
7709 /* This register is not available. */
7710 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7715 fetch_registers_using_g (regcache
);
7717 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7718 if (!rsa
->regs
[i
].in_g_packet
)
7719 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7721 /* This register is not available. */
7722 regcache_raw_supply (regcache
, i
, NULL
);
7726 /* Prepare to store registers. Since we may send them all (using a
7727 'G' request), we have to read out the ones we don't want to change
7731 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7733 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7736 /* Make sure the entire registers array is valid. */
7737 switch (packet_support (PACKET_P
))
7739 case PACKET_DISABLE
:
7740 case PACKET_SUPPORT_UNKNOWN
:
7741 /* Make sure all the necessary registers are cached. */
7742 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7743 if (rsa
->regs
[i
].in_g_packet
)
7744 regcache_raw_update (regcache
, rsa
->regs
[i
].regnum
);
7751 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7752 packet was not recognized. */
7755 store_register_using_P (const struct regcache
*regcache
,
7756 struct packet_reg
*reg
)
7758 struct gdbarch
*gdbarch
= regcache
->arch ();
7759 struct remote_state
*rs
= get_remote_state ();
7760 /* Try storing a single register. */
7761 char *buf
= rs
->buf
;
7762 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7765 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7768 if (reg
->pnum
== -1)
7771 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7772 p
= buf
+ strlen (buf
);
7773 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7774 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7776 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7778 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7783 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7784 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7785 case PACKET_UNKNOWN
:
7788 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7792 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7793 contents of the register cache buffer. FIXME: ignores errors. */
7796 store_registers_using_G (const struct regcache
*regcache
)
7798 struct remote_state
*rs
= get_remote_state ();
7799 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7803 /* Extract all the registers in the regcache copying them into a
7808 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7809 memset (regs
, 0, rsa
->sizeof_g_packet
);
7810 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7812 struct packet_reg
*r
= &rsa
->regs
[i
];
7815 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7819 /* Command describes registers byte by byte,
7820 each byte encoded as two hex characters. */
7823 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7825 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7826 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7827 error (_("Could not write registers; remote failure reply '%s'"),
7831 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7832 of the register cache buffer. FIXME: ignores errors. */
7835 remote_store_registers (struct target_ops
*ops
,
7836 struct regcache
*regcache
, int regnum
)
7838 struct gdbarch
*gdbarch
= regcache
->arch ();
7839 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7842 set_remote_traceframe ();
7843 set_general_thread (regcache_get_ptid (regcache
));
7847 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7849 gdb_assert (reg
!= NULL
);
7851 /* Always prefer to store registers using the 'P' packet if
7852 possible; we often change only a small number of registers.
7853 Sometimes we change a larger number; we'd need help from a
7854 higher layer to know to use 'G'. */
7855 if (store_register_using_P (regcache
, reg
))
7858 /* For now, don't complain if we have no way to write the
7859 register. GDB loses track of unavailable registers too
7860 easily. Some day, this may be an error. We don't have
7861 any way to read the register, either... */
7862 if (!reg
->in_g_packet
)
7865 store_registers_using_G (regcache
);
7869 store_registers_using_G (regcache
);
7871 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7872 if (!rsa
->regs
[i
].in_g_packet
)
7873 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7874 /* See above for why we do not issue an error here. */
7879 /* Return the number of hex digits in num. */
7882 hexnumlen (ULONGEST num
)
7886 for (i
= 0; num
!= 0; i
++)
7889 return std::max (i
, 1);
7892 /* Set BUF to the minimum number of hex digits representing NUM. */
7895 hexnumstr (char *buf
, ULONGEST num
)
7897 int len
= hexnumlen (num
);
7899 return hexnumnstr (buf
, num
, len
);
7903 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7906 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7912 for (i
= width
- 1; i
>= 0; i
--)
7914 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7921 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7924 remote_address_masked (CORE_ADDR addr
)
7926 unsigned int address_size
= remote_address_size
;
7928 /* If "remoteaddresssize" was not set, default to target address size. */
7930 address_size
= gdbarch_addr_bit (target_gdbarch ());
7932 if (address_size
> 0
7933 && address_size
< (sizeof (ULONGEST
) * 8))
7935 /* Only create a mask when that mask can safely be constructed
7936 in a ULONGEST variable. */
7939 mask
= (mask
<< address_size
) - 1;
7945 /* Determine whether the remote target supports binary downloading.
7946 This is accomplished by sending a no-op memory write of zero length
7947 to the target at the specified address. It does not suffice to send
7948 the whole packet, since many stubs strip the eighth bit and
7949 subsequently compute a wrong checksum, which causes real havoc with
7952 NOTE: This can still lose if the serial line is not eight-bit
7953 clean. In cases like this, the user should clear "remote
7957 check_binary_download (CORE_ADDR addr
)
7959 struct remote_state
*rs
= get_remote_state ();
7961 switch (packet_support (PACKET_X
))
7963 case PACKET_DISABLE
:
7967 case PACKET_SUPPORT_UNKNOWN
:
7973 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7975 p
+= hexnumstr (p
, (ULONGEST
) 0);
7979 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7980 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7982 if (rs
->buf
[0] == '\0')
7985 fprintf_unfiltered (gdb_stdlog
,
7986 "binary downloading NOT "
7987 "supported by target\n");
7988 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
7993 fprintf_unfiltered (gdb_stdlog
,
7994 "binary downloading supported by target\n");
7995 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8002 /* Helper function to resize the payload in order to try to get a good
8003 alignment. We try to write an amount of data such that the next write will
8004 start on an address aligned on REMOTE_ALIGN_WRITES. */
8007 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8009 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8012 /* Write memory data directly to the remote machine.
8013 This does not inform the data cache; the data cache uses this.
8014 HEADER is the starting part of the packet.
8015 MEMADDR is the address in the remote memory space.
8016 MYADDR is the address of the buffer in our space.
8017 LEN_UNITS is the number of addressable units to write.
8018 UNIT_SIZE is the length in bytes of an addressable unit.
8019 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8020 should send data as binary ('X'), or hex-encoded ('M').
8022 The function creates packet of the form
8023 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8025 where encoding of <DATA> is terminated by PACKET_FORMAT.
8027 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8030 Return the transferred status, error or OK (an
8031 'enum target_xfer_status' value). Save the number of addressable units
8032 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8034 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8035 exchange between gdb and the stub could look like (?? in place of the
8041 -> $M1000,3:eeeeffffeeee#??
8045 <- eeeeffffeeeedddd */
8047 static enum target_xfer_status
8048 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8049 const gdb_byte
*myaddr
, ULONGEST len_units
,
8050 int unit_size
, ULONGEST
*xfered_len_units
,
8051 char packet_format
, int use_length
)
8053 struct remote_state
*rs
= get_remote_state ();
8059 int payload_capacity_bytes
;
8060 int payload_length_bytes
;
8062 if (packet_format
!= 'X' && packet_format
!= 'M')
8063 internal_error (__FILE__
, __LINE__
,
8064 _("remote_write_bytes_aux: bad packet format"));
8067 return TARGET_XFER_EOF
;
8069 payload_capacity_bytes
= get_memory_write_packet_size ();
8071 /* The packet buffer will be large enough for the payload;
8072 get_memory_packet_size ensures this. */
8075 /* Compute the size of the actual payload by subtracting out the
8076 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8078 payload_capacity_bytes
-= strlen ("$,:#NN");
8080 /* The comma won't be used. */
8081 payload_capacity_bytes
+= 1;
8082 payload_capacity_bytes
-= strlen (header
);
8083 payload_capacity_bytes
-= hexnumlen (memaddr
);
8085 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8087 strcat (rs
->buf
, header
);
8088 p
= rs
->buf
+ strlen (header
);
8090 /* Compute a best guess of the number of bytes actually transfered. */
8091 if (packet_format
== 'X')
8093 /* Best guess at number of bytes that will fit. */
8094 todo_units
= std::min (len_units
,
8095 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8097 payload_capacity_bytes
-= hexnumlen (todo_units
);
8098 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8102 /* Number of bytes that will fit. */
8104 = std::min (len_units
,
8105 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8107 payload_capacity_bytes
-= hexnumlen (todo_units
);
8108 todo_units
= std::min (todo_units
,
8109 (payload_capacity_bytes
/ unit_size
) / 2);
8112 if (todo_units
<= 0)
8113 internal_error (__FILE__
, __LINE__
,
8114 _("minimum packet size too small to write data"));
8116 /* If we already need another packet, then try to align the end
8117 of this packet to a useful boundary. */
8118 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8119 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8121 /* Append "<memaddr>". */
8122 memaddr
= remote_address_masked (memaddr
);
8123 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8130 /* Append the length and retain its location and size. It may need to be
8131 adjusted once the packet body has been created. */
8133 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8141 /* Append the packet body. */
8142 if (packet_format
== 'X')
8144 /* Binary mode. Send target system values byte by byte, in
8145 increasing byte addresses. Only escape certain critical
8147 payload_length_bytes
=
8148 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8149 &units_written
, payload_capacity_bytes
);
8151 /* If not all TODO units fit, then we'll need another packet. Make
8152 a second try to keep the end of the packet aligned. Don't do
8153 this if the packet is tiny. */
8154 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8158 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8160 if (new_todo_units
!= units_written
)
8161 payload_length_bytes
=
8162 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8163 (gdb_byte
*) p
, &units_written
,
8164 payload_capacity_bytes
);
8167 p
+= payload_length_bytes
;
8168 if (use_length
&& units_written
< todo_units
)
8170 /* Escape chars have filled up the buffer prematurely,
8171 and we have actually sent fewer units than planned.
8172 Fix-up the length field of the packet. Use the same
8173 number of characters as before. */
8174 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8176 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8181 /* Normal mode: Send target system values byte by byte, in
8182 increasing byte addresses. Each byte is encoded as a two hex
8184 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8185 units_written
= todo_units
;
8188 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8189 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8191 if (rs
->buf
[0] == 'E')
8192 return TARGET_XFER_E_IO
;
8194 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8195 send fewer units than we'd planned. */
8196 *xfered_len_units
= (ULONGEST
) units_written
;
8197 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8200 /* Write memory data directly to the remote machine.
8201 This does not inform the data cache; the data cache uses this.
8202 MEMADDR is the address in the remote memory space.
8203 MYADDR is the address of the buffer in our space.
8204 LEN is the number of bytes.
8206 Return the transferred status, error or OK (an
8207 'enum target_xfer_status' value). Save the number of bytes
8208 transferred in *XFERED_LEN. Only transfer a single packet. */
8210 static enum target_xfer_status
8211 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
8212 int unit_size
, ULONGEST
*xfered_len
)
8214 const char *packet_format
= NULL
;
8216 /* Check whether the target supports binary download. */
8217 check_binary_download (memaddr
);
8219 switch (packet_support (PACKET_X
))
8222 packet_format
= "X";
8224 case PACKET_DISABLE
:
8225 packet_format
= "M";
8227 case PACKET_SUPPORT_UNKNOWN
:
8228 internal_error (__FILE__
, __LINE__
,
8229 _("remote_write_bytes: bad internal state"));
8231 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8234 return remote_write_bytes_aux (packet_format
,
8235 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8236 packet_format
[0], 1);
8239 /* Read memory data directly from the remote machine.
8240 This does not use the data cache; the data cache uses this.
8241 MEMADDR is the address in the remote memory space.
8242 MYADDR is the address of the buffer in our space.
8243 LEN_UNITS is the number of addressable memory units to read..
8244 UNIT_SIZE is the length in bytes of an addressable unit.
8246 Return the transferred status, error or OK (an
8247 'enum target_xfer_status' value). Save the number of bytes
8248 transferred in *XFERED_LEN_UNITS.
8250 See the comment of remote_write_bytes_aux for an example of
8251 memory read/write exchange between gdb and the stub. */
8253 static enum target_xfer_status
8254 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
8255 int unit_size
, ULONGEST
*xfered_len_units
)
8257 struct remote_state
*rs
= get_remote_state ();
8258 int buf_size_bytes
; /* Max size of packet output buffer. */
8263 buf_size_bytes
= get_memory_read_packet_size ();
8264 /* The packet buffer will be large enough for the payload;
8265 get_memory_packet_size ensures this. */
8267 /* Number of units that will fit. */
8268 todo_units
= std::min (len_units
,
8269 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8271 /* Construct "m"<memaddr>","<len>". */
8272 memaddr
= remote_address_masked (memaddr
);
8275 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8277 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8280 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8281 if (rs
->buf
[0] == 'E'
8282 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8283 && rs
->buf
[3] == '\0')
8284 return TARGET_XFER_E_IO
;
8285 /* Reply describes memory byte by byte, each byte encoded as two hex
8288 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8289 /* Return what we have. Let higher layers handle partial reads. */
8290 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8291 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8294 /* Using the set of read-only target sections of remote, read live
8297 For interface/parameters/return description see target.h,
8300 static enum target_xfer_status
8301 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
8302 ULONGEST memaddr
, ULONGEST len
,
8303 int unit_size
, ULONGEST
*xfered_len
)
8305 struct target_section
*secp
;
8306 struct target_section_table
*table
;
8308 secp
= target_section_by_addr (ops
, memaddr
);
8310 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8311 secp
->the_bfd_section
)
8314 struct target_section
*p
;
8315 ULONGEST memend
= memaddr
+ len
;
8317 table
= target_get_section_table (ops
);
8319 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8321 if (memaddr
>= p
->addr
)
8323 if (memend
<= p
->endaddr
)
8325 /* Entire transfer is within this section. */
8326 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8329 else if (memaddr
>= p
->endaddr
)
8331 /* This section ends before the transfer starts. */
8336 /* This section overlaps the transfer. Just do half. */
8337 len
= p
->endaddr
- memaddr
;
8338 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8345 return TARGET_XFER_EOF
;
8348 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8349 first if the requested memory is unavailable in traceframe.
8350 Otherwise, fall back to remote_read_bytes_1. */
8352 static enum target_xfer_status
8353 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
8354 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8355 ULONGEST
*xfered_len
)
8358 return TARGET_XFER_EOF
;
8360 if (get_traceframe_number () != -1)
8362 std::vector
<mem_range
> available
;
8364 /* If we fail to get the set of available memory, then the
8365 target does not support querying traceframe info, and so we
8366 attempt reading from the traceframe anyway (assuming the
8367 target implements the old QTro packet then). */
8368 if (traceframe_available_memory (&available
, memaddr
, len
))
8370 if (available
.empty () || available
[0].start
!= memaddr
)
8372 enum target_xfer_status res
;
8374 /* Don't read into the traceframe's available
8376 if (!available
.empty ())
8378 LONGEST oldlen
= len
;
8380 len
= available
[0].start
- memaddr
;
8381 gdb_assert (len
<= oldlen
);
8384 /* This goes through the topmost target again. */
8385 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8386 len
, unit_size
, xfered_len
);
8387 if (res
== TARGET_XFER_OK
)
8388 return TARGET_XFER_OK
;
8391 /* No use trying further, we know some memory starting
8392 at MEMADDR isn't available. */
8394 return (*xfered_len
!= 0) ?
8395 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8399 /* Don't try to read more than how much is available, in
8400 case the target implements the deprecated QTro packet to
8401 cater for older GDBs (the target's knowledge of read-only
8402 sections may be outdated by now). */
8403 len
= available
[0].length
;
8407 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8412 /* Sends a packet with content determined by the printf format string
8413 FORMAT and the remaining arguments, then gets the reply. Returns
8414 whether the packet was a success, a failure, or unknown. */
8416 static enum packet_result
remote_send_printf (const char *format
, ...)
8417 ATTRIBUTE_PRINTF (1, 2);
8419 static enum packet_result
8420 remote_send_printf (const char *format
, ...)
8422 struct remote_state
*rs
= get_remote_state ();
8423 int max_size
= get_remote_packet_size ();
8426 va_start (ap
, format
);
8429 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8430 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8432 if (putpkt (rs
->buf
) < 0)
8433 error (_("Communication problem with target."));
8436 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8438 return packet_check_result (rs
->buf
);
8441 /* Flash writing can take quite some time. We'll set
8442 effectively infinite timeout for flash operations.
8443 In future, we'll need to decide on a better approach. */
8444 static const int remote_flash_timeout
= 1000;
8447 remote_flash_erase (struct target_ops
*ops
,
8448 ULONGEST address
, LONGEST length
)
8450 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8451 enum packet_result ret
;
8452 scoped_restore restore_timeout
8453 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8455 ret
= remote_send_printf ("vFlashErase:%s,%s",
8456 phex (address
, addr_size
),
8460 case PACKET_UNKNOWN
:
8461 error (_("Remote target does not support flash erase"));
8463 error (_("Error erasing flash with vFlashErase packet"));
8469 static enum target_xfer_status
8470 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8471 ULONGEST length
, ULONGEST
*xfered_len
,
8472 const gdb_byte
*data
)
8474 scoped_restore restore_timeout
8475 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8476 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8481 remote_flash_done (struct target_ops
*ops
)
8485 scoped_restore restore_timeout
8486 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8488 ret
= remote_send_printf ("vFlashDone");
8492 case PACKET_UNKNOWN
:
8493 error (_("Remote target does not support vFlashDone"));
8495 error (_("Error finishing flash operation"));
8502 remote_files_info (struct target_ops
*ignore
)
8504 puts_filtered ("Debugging a target over a serial line.\n");
8507 /* Stuff for dealing with the packets which are part of this protocol.
8508 See comment at top of file for details. */
8510 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8511 error to higher layers. Called when a serial error is detected.
8512 The exception message is STRING, followed by a colon and a blank,
8513 the system error message for errno at function entry and final dot
8514 for output compatibility with throw_perror_with_name. */
8517 unpush_and_perror (const char *string
)
8519 int saved_errno
= errno
;
8521 remote_unpush_target ();
8522 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8523 safe_strerror (saved_errno
));
8526 /* Read a single character from the remote end. The current quit
8527 handler is overridden to avoid quitting in the middle of packet
8528 sequence, as that would break communication with the remote server.
8529 See remote_serial_quit_handler for more detail. */
8532 readchar (int timeout
)
8535 struct remote_state
*rs
= get_remote_state ();
8538 scoped_restore restore_quit
8539 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8541 rs
->got_ctrlc_during_io
= 0;
8543 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8545 if (rs
->got_ctrlc_during_io
)
8552 switch ((enum serial_rc
) ch
)
8555 remote_unpush_target ();
8556 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8559 unpush_and_perror (_("Remote communication error. "
8560 "Target disconnected."));
8562 case SERIAL_TIMEOUT
:
8568 /* Wrapper for serial_write that closes the target and throws if
8569 writing fails. The current quit handler is overridden to avoid
8570 quitting in the middle of packet sequence, as that would break
8571 communication with the remote server. See
8572 remote_serial_quit_handler for more detail. */
8575 remote_serial_write (const char *str
, int len
)
8577 struct remote_state
*rs
= get_remote_state ();
8579 scoped_restore restore_quit
8580 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8582 rs
->got_ctrlc_during_io
= 0;
8584 if (serial_write (rs
->remote_desc
, str
, len
))
8586 unpush_and_perror (_("Remote communication error. "
8587 "Target disconnected."));
8590 if (rs
->got_ctrlc_during_io
)
8594 /* Send the command in *BUF to the remote machine, and read the reply
8595 into *BUF. Report an error if we get an error reply. Resize
8596 *BUF using xrealloc if necessary to hold the result, and update
8600 remote_send (char **buf
,
8604 getpkt (buf
, sizeof_buf
, 0);
8606 if ((*buf
)[0] == 'E')
8607 error (_("Remote failure reply: %s"), *buf
);
8610 /* Return a string representing an escaped version of BUF, of len N.
8611 E.g. \n is converted to \\n, \t to \\t, etc. */
8614 escape_buffer (const char *buf
, int n
)
8618 stb
.putstrn (buf
, n
, '\\');
8619 return std::move (stb
.string ());
8622 /* Display a null-terminated packet on stdout, for debugging, using C
8626 print_packet (const char *buf
)
8628 puts_filtered ("\"");
8629 fputstr_filtered (buf
, '"', gdb_stdout
);
8630 puts_filtered ("\"");
8634 putpkt (const char *buf
)
8636 return putpkt_binary (buf
, strlen (buf
));
8639 /* Send a packet to the remote machine, with error checking. The data
8640 of the packet is in BUF. The string in BUF can be at most
8641 get_remote_packet_size () - 5 to account for the $, # and checksum,
8642 and for a possible /0 if we are debugging (remote_debug) and want
8643 to print the sent packet as a string. */
8646 putpkt_binary (const char *buf
, int cnt
)
8648 struct remote_state
*rs
= get_remote_state ();
8650 unsigned char csum
= 0;
8651 gdb::def_vector
<char> data (cnt
+ 6);
8652 char *buf2
= data
.data ();
8658 /* Catch cases like trying to read memory or listing threads while
8659 we're waiting for a stop reply. The remote server wouldn't be
8660 ready to handle this request, so we'd hang and timeout. We don't
8661 have to worry about this in synchronous mode, because in that
8662 case it's not possible to issue a command while the target is
8663 running. This is not a problem in non-stop mode, because in that
8664 case, the stub is always ready to process serial input. */
8665 if (!target_is_non_stop_p ()
8666 && target_is_async_p ()
8667 && rs
->waiting_for_stop_reply
)
8669 error (_("Cannot execute this command while the target is running.\n"
8670 "Use the \"interrupt\" command to stop the target\n"
8671 "and then try again."));
8674 /* We're sending out a new packet. Make sure we don't look at a
8675 stale cached response. */
8676 rs
->cached_wait_status
= 0;
8678 /* Copy the packet into buffer BUF2, encapsulating it
8679 and giving it a checksum. */
8684 for (i
= 0; i
< cnt
; i
++)
8690 *p
++ = tohex ((csum
>> 4) & 0xf);
8691 *p
++ = tohex (csum
& 0xf);
8693 /* Send it over and over until we get a positive ack. */
8697 int started_error_output
= 0;
8703 int len
= (int) (p
- buf2
);
8706 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
8708 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
8710 if (len
> REMOTE_DEBUG_MAX_CHAR
)
8711 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
8712 len
- REMOTE_DEBUG_MAX_CHAR
);
8714 fprintf_unfiltered (gdb_stdlog
, "...");
8716 gdb_flush (gdb_stdlog
);
8718 remote_serial_write (buf2
, p
- buf2
);
8720 /* If this is a no acks version of the remote protocol, send the
8721 packet and move on. */
8725 /* Read until either a timeout occurs (-2) or '+' is read.
8726 Handle any notification that arrives in the mean time. */
8729 ch
= readchar (remote_timeout
);
8737 case SERIAL_TIMEOUT
:
8740 if (started_error_output
)
8742 putchar_unfiltered ('\n');
8743 started_error_output
= 0;
8752 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8756 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8758 case SERIAL_TIMEOUT
:
8762 break; /* Retransmit buffer. */
8766 fprintf_unfiltered (gdb_stdlog
,
8767 "Packet instead of Ack, ignoring it\n");
8768 /* It's probably an old response sent because an ACK
8769 was lost. Gobble up the packet and ack it so it
8770 doesn't get retransmitted when we resend this
8773 remote_serial_write ("+", 1);
8774 continue; /* Now, go look for +. */
8781 /* If we got a notification, handle it, and go back to looking
8783 /* We've found the start of a notification. Now
8784 collect the data. */
8785 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8790 std::string str
= escape_buffer (rs
->buf
, val
);
8792 fprintf_unfiltered (gdb_stdlog
,
8793 " Notification received: %s\n",
8796 handle_notification (rs
->notif_state
, rs
->buf
);
8797 /* We're in sync now, rewait for the ack. */
8804 if (!started_error_output
)
8806 started_error_output
= 1;
8807 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8809 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8810 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8819 if (!started_error_output
)
8821 started_error_output
= 1;
8822 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8824 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8828 break; /* Here to retransmit. */
8832 /* This is wrong. If doing a long backtrace, the user should be
8833 able to get out next time we call QUIT, without anything as
8834 violent as interrupt_query. If we want to provide a way out of
8835 here without getting to the next QUIT, it should be based on
8836 hitting ^C twice as in remote_wait. */
8848 /* Come here after finding the start of a frame when we expected an
8849 ack. Do our best to discard the rest of this packet. */
8858 c
= readchar (remote_timeout
);
8861 case SERIAL_TIMEOUT
:
8862 /* Nothing we can do. */
8865 /* Discard the two bytes of checksum and stop. */
8866 c
= readchar (remote_timeout
);
8868 c
= readchar (remote_timeout
);
8871 case '*': /* Run length encoding. */
8872 /* Discard the repeat count. */
8873 c
= readchar (remote_timeout
);
8878 /* A regular character. */
8884 /* Come here after finding the start of the frame. Collect the rest
8885 into *BUF, verifying the checksum, length, and handling run-length
8886 compression. NUL terminate the buffer. If there is not enough room,
8887 expand *BUF using xrealloc.
8889 Returns -1 on error, number of characters in buffer (ignoring the
8890 trailing NULL) on success. (could be extended to return one of the
8891 SERIAL status indications). */
8894 read_frame (char **buf_p
,
8901 struct remote_state
*rs
= get_remote_state ();
8908 c
= readchar (remote_timeout
);
8911 case SERIAL_TIMEOUT
:
8913 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8917 fputs_filtered ("Saw new packet start in middle of old one\n",
8919 return -1; /* Start a new packet, count retries. */
8922 unsigned char pktcsum
;
8928 check_0
= readchar (remote_timeout
);
8930 check_1
= readchar (remote_timeout
);
8932 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
8935 fputs_filtered ("Timeout in checksum, retrying\n",
8939 else if (check_0
< 0 || check_1
< 0)
8942 fputs_filtered ("Communication error in checksum\n",
8947 /* Don't recompute the checksum; with no ack packets we
8948 don't have any way to indicate a packet retransmission
8953 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
8954 if (csum
== pktcsum
)
8959 std::string str
= escape_buffer (buf
, bc
);
8961 fprintf_unfiltered (gdb_stdlog
,
8962 "Bad checksum, sentsum=0x%x, "
8963 "csum=0x%x, buf=%s\n",
8964 pktcsum
, csum
, str
.c_str ());
8966 /* Number of characters in buffer ignoring trailing
8970 case '*': /* Run length encoding. */
8975 c
= readchar (remote_timeout
);
8977 repeat
= c
- ' ' + 3; /* Compute repeat count. */
8979 /* The character before ``*'' is repeated. */
8981 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
8983 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
8985 /* Make some more room in the buffer. */
8986 *sizeof_buf
+= repeat
;
8987 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
8991 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
8997 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9001 if (bc
>= *sizeof_buf
- 1)
9003 /* Make some more room in the buffer. */
9005 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9016 /* Read a packet from the remote machine, with error checking, and
9017 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9018 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9019 rather than timing out; this is used (in synchronous mode) to wait
9020 for a target that is is executing user code to stop. */
9021 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9022 don't have to change all the calls to getpkt to deal with the
9023 return value, because at the moment I don't know what the right
9024 thing to do it for those. */
9030 getpkt_sane (buf
, sizeof_buf
, forever
);
9034 /* Read a packet from the remote machine, with error checking, and
9035 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9036 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9037 rather than timing out; this is used (in synchronous mode) to wait
9038 for a target that is is executing user code to stop. If FOREVER ==
9039 0, this function is allowed to time out gracefully and return an
9040 indication of this to the caller. Otherwise return the number of
9041 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9042 enough reason to return to the caller. *IS_NOTIF is an output
9043 boolean that indicates whether *BUF holds a notification or not
9044 (a regular packet). */
9047 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
9048 int expecting_notif
, int *is_notif
)
9050 struct remote_state
*rs
= get_remote_state ();
9056 /* We're reading a new response. Make sure we don't look at a
9057 previously cached response. */
9058 rs
->cached_wait_status
= 0;
9060 strcpy (*buf
, "timeout");
9063 timeout
= watchdog
> 0 ? watchdog
: -1;
9064 else if (expecting_notif
)
9065 timeout
= 0; /* There should already be a char in the buffer. If
9068 timeout
= remote_timeout
;
9072 /* Process any number of notifications, and then return when
9076 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9078 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9080 /* This can loop forever if the remote side sends us
9081 characters continuously, but if it pauses, we'll get
9082 SERIAL_TIMEOUT from readchar because of timeout. Then
9083 we'll count that as a retry.
9085 Note that even when forever is set, we will only wait
9086 forever prior to the start of a packet. After that, we
9087 expect characters to arrive at a brisk pace. They should
9088 show up within remote_timeout intervals. */
9090 c
= readchar (timeout
);
9091 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9093 if (c
== SERIAL_TIMEOUT
)
9095 if (expecting_notif
)
9096 return -1; /* Don't complain, it's normal to not get
9097 anything in this case. */
9099 if (forever
) /* Watchdog went off? Kill the target. */
9101 remote_unpush_target ();
9102 throw_error (TARGET_CLOSE_ERROR
,
9103 _("Watchdog timeout has expired. "
9104 "Target detached."));
9107 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9111 /* We've found the start of a packet or notification.
9112 Now collect the data. */
9113 val
= read_frame (buf
, sizeof_buf
);
9118 remote_serial_write ("-", 1);
9121 if (tries
> MAX_TRIES
)
9123 /* We have tried hard enough, and just can't receive the
9124 packet/notification. Give up. */
9125 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9127 /* Skip the ack char if we're in no-ack mode. */
9128 if (!rs
->noack_mode
)
9129 remote_serial_write ("+", 1);
9133 /* If we got an ordinary packet, return that to our caller. */
9139 = escape_buffer (*buf
,
9140 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9142 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9145 if (val
> REMOTE_DEBUG_MAX_CHAR
)
9146 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9147 val
- REMOTE_DEBUG_MAX_CHAR
);
9149 fprintf_unfiltered (gdb_stdlog
, "\n");
9152 /* Skip the ack char if we're in no-ack mode. */
9153 if (!rs
->noack_mode
)
9154 remote_serial_write ("+", 1);
9155 if (is_notif
!= NULL
)
9160 /* If we got a notification, handle it, and go back to looking
9164 gdb_assert (c
== '%');
9168 std::string str
= escape_buffer (*buf
, val
);
9170 fprintf_unfiltered (gdb_stdlog
,
9171 " Notification received: %s\n",
9174 if (is_notif
!= NULL
)
9177 handle_notification (rs
->notif_state
, *buf
);
9179 /* Notifications require no acknowledgement. */
9181 if (expecting_notif
)
9188 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9190 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9194 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9197 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9201 /* Check whether EVENT is a fork event for the process specified
9202 by the pid passed in DATA, and if it is, kill the fork child. */
9205 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
9206 QUEUE_ITER (stop_reply_p
) *iter
,
9210 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
9211 int parent_pid
= *(int *) param
->input
;
9213 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
9215 struct remote_state
*rs
= get_remote_state ();
9216 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
9219 res
= remote_vkill (child_pid
, rs
);
9221 error (_("Can't kill fork child process %d"), child_pid
);
9227 /* Kill any new fork children of process PID that haven't been
9228 processed by follow_fork. */
9231 kill_new_fork_children (int pid
, struct remote_state
*rs
)
9233 struct thread_info
*thread
;
9234 struct notif_client
*notif
= ¬if_client_stop
;
9235 struct queue_iter_param param
;
9237 /* Kill the fork child threads of any threads in process PID
9238 that are stopped at a fork event. */
9239 ALL_NON_EXITED_THREADS (thread
)
9241 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9243 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9245 struct remote_state
*rs
= get_remote_state ();
9246 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
9249 res
= remote_vkill (child_pid
, rs
);
9251 error (_("Can't kill fork child process %d"), child_pid
);
9255 /* Check for any pending fork events (not reported or processed yet)
9256 in process PID and kill those fork child threads as well. */
9257 remote_notif_get_pending_events (notif
);
9259 param
.output
= NULL
;
9260 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
9261 kill_child_of_pending_fork
, ¶m
);
9265 /* Target hook to kill the current inferior. */
9268 remote_kill (struct target_ops
*ops
)
9271 int pid
= ptid_get_pid (inferior_ptid
);
9272 struct remote_state
*rs
= get_remote_state ();
9274 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9276 /* If we're stopped while forking and we haven't followed yet,
9277 kill the child task. We need to do this before killing the
9278 parent task because if this is a vfork then the parent will
9280 kill_new_fork_children (pid
, rs
);
9282 res
= remote_vkill (pid
, rs
);
9285 target_mourn_inferior (inferior_ptid
);
9290 /* If we are in 'target remote' mode and we are killing the only
9291 inferior, then we will tell gdbserver to exit and unpush the
9293 if (res
== -1 && !remote_multi_process_p (rs
)
9294 && number_of_live_inferiors () == 1)
9298 /* We've killed the remote end, we get to mourn it. If we are
9299 not in extended mode, mourning the inferior also unpushes
9300 remote_ops from the target stack, which closes the remote
9302 target_mourn_inferior (inferior_ptid
);
9307 error (_("Can't kill process"));
9310 /* Send a kill request to the target using the 'vKill' packet. */
9313 remote_vkill (int pid
, struct remote_state
*rs
)
9315 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9318 /* Tell the remote target to detach. */
9319 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9321 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9323 switch (packet_ok (rs
->buf
,
9324 &remote_protocol_packets
[PACKET_vKill
]))
9330 case PACKET_UNKNOWN
:
9333 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9337 /* Send a kill request to the target using the 'k' packet. */
9340 remote_kill_k (void)
9342 /* Catch errors so the user can quit from gdb even when we
9343 aren't on speaking terms with the remote system. */
9348 CATCH (ex
, RETURN_MASK_ERROR
)
9350 if (ex
.error
== TARGET_CLOSE_ERROR
)
9352 /* If we got an (EOF) error that caused the target
9353 to go away, then we're done, that's what we wanted.
9354 "k" is susceptible to cause a premature EOF, given
9355 that the remote server isn't actually required to
9356 reply to "k", and it can happen that it doesn't
9357 even get to reply ACK to the "k". */
9361 /* Otherwise, something went wrong. We didn't actually kill
9362 the target. Just propagate the exception, and let the
9363 user or higher layers decide what to do. */
9364 throw_exception (ex
);
9370 remote_mourn (struct target_ops
*target
)
9372 struct remote_state
*rs
= get_remote_state ();
9374 /* In 'target remote' mode with one inferior, we close the connection. */
9375 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9377 unpush_target (target
);
9379 /* remote_close takes care of doing most of the clean up. */
9380 generic_mourn_inferior ();
9384 /* In case we got here due to an error, but we're going to stay
9386 rs
->waiting_for_stop_reply
= 0;
9388 /* If the current general thread belonged to the process we just
9389 detached from or has exited, the remote side current general
9390 thread becomes undefined. Considering a case like this:
9392 - We just got here due to a detach.
9393 - The process that we're detaching from happens to immediately
9394 report a global breakpoint being hit in non-stop mode, in the
9395 same thread we had selected before.
9396 - GDB attaches to this process again.
9397 - This event happens to be the next event we handle.
9399 GDB would consider that the current general thread didn't need to
9400 be set on the stub side (with Hg), since for all it knew,
9401 GENERAL_THREAD hadn't changed.
9403 Notice that although in all-stop mode, the remote server always
9404 sets the current thread to the thread reporting the stop event,
9405 that doesn't happen in non-stop mode; in non-stop, the stub *must
9406 not* change the current thread when reporting a breakpoint hit,
9407 due to the decoupling of event reporting and event handling.
9409 To keep things simple, we always invalidate our notion of the
9411 record_currthread (rs
, minus_one_ptid
);
9413 /* Call common code to mark the inferior as not running. */
9414 generic_mourn_inferior ();
9416 if (!have_inferiors ())
9418 if (!remote_multi_process_p (rs
))
9420 /* Check whether the target is running now - some remote stubs
9421 automatically restart after kill. */
9423 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9425 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9427 /* Assume that the target has been restarted. Set
9428 inferior_ptid so that bits of core GDB realizes
9429 there's something here, e.g., so that the user can
9430 say "kill" again. */
9431 inferior_ptid
= magic_null_ptid
;
9438 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9440 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9444 extended_remote_disable_randomization (int val
)
9446 struct remote_state
*rs
= get_remote_state ();
9449 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9452 reply
= remote_get_noisy_reply ();
9454 error (_("Target does not support QDisableRandomization."));
9455 if (strcmp (reply
, "OK") != 0)
9456 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9460 extended_remote_run (const std::string
&args
)
9462 struct remote_state
*rs
= get_remote_state ();
9464 const char *remote_exec_file
= get_remote_exec_file ();
9466 /* If the user has disabled vRun support, or we have detected that
9467 support is not available, do not try it. */
9468 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9471 strcpy (rs
->buf
, "vRun;");
9472 len
= strlen (rs
->buf
);
9474 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9475 error (_("Remote file name too long for run packet"));
9476 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9477 strlen (remote_exec_file
));
9483 gdb_argv
argv (args
.c_str ());
9484 for (i
= 0; argv
[i
] != NULL
; i
++)
9486 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9487 error (_("Argument list too long for run packet"));
9488 rs
->buf
[len
++] = ';';
9489 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9494 rs
->buf
[len
++] = '\0';
9497 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9499 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9502 /* We have a wait response. All is well. */
9504 case PACKET_UNKNOWN
:
9507 if (remote_exec_file
[0] == '\0')
9508 error (_("Running the default executable on the remote target failed; "
9509 "try \"set remote exec-file\"?"));
9511 error (_("Running \"%s\" on the remote target failed"),
9514 gdb_assert_not_reached (_("bad switch"));
9518 /* Helper function to send set/unset environment packets. ACTION is
9519 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9520 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9524 send_environment_packet (struct remote_state
*rs
,
9529 /* Convert the environment variable to an hex string, which
9530 is the best format to be transmitted over the wire. */
9531 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
9534 xsnprintf (rs
->buf
, get_remote_packet_size (),
9535 "%s:%s", packet
, encoded_value
.c_str ());
9538 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9539 if (strcmp (rs
->buf
, "OK") != 0)
9540 warning (_("Unable to %s environment variable '%s' on remote."),
9544 /* Helper function to handle the QEnvironment* packets. */
9547 extended_remote_environment_support (struct remote_state
*rs
)
9549 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
9551 putpkt ("QEnvironmentReset");
9552 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9553 if (strcmp (rs
->buf
, "OK") != 0)
9554 warning (_("Unable to reset environment on remote."));
9557 gdb_environ
*e
= ¤t_inferior ()->environment
;
9559 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
9560 for (const std::string
&el
: e
->user_set_env ())
9561 send_environment_packet (rs
, "set", "QEnvironmentHexEncoded",
9564 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
9565 for (const std::string
&el
: e
->user_unset_env ())
9566 send_environment_packet (rs
, "unset", "QEnvironmentUnset", el
.c_str ());
9569 /* Helper function to set the current working directory for the
9570 inferior in the remote target. */
9573 extended_remote_set_inferior_cwd (struct remote_state
*rs
)
9575 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
9577 const char *inferior_cwd
= get_inferior_cwd ();
9579 if (inferior_cwd
!= NULL
)
9581 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
9582 strlen (inferior_cwd
));
9584 xsnprintf (rs
->buf
, get_remote_packet_size (),
9585 "QSetWorkingDir:%s", hexpath
.c_str ());
9589 /* An empty inferior_cwd means that the user wants us to
9590 reset the remote server's inferior's cwd. */
9591 xsnprintf (rs
->buf
, get_remote_packet_size (),
9596 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9597 if (packet_ok (rs
->buf
,
9598 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
9601 Remote replied unexpectedly while setting the inferior's working\n\
9608 /* In the extended protocol we want to be able to do things like
9609 "run" and have them basically work as expected. So we need
9610 a special create_inferior function. We support changing the
9611 executable file and the command line arguments, but not the
9615 extended_remote_create_inferior (struct target_ops
*ops
,
9616 const char *exec_file
,
9617 const std::string
&args
,
9618 char **env
, int from_tty
)
9622 struct remote_state
*rs
= get_remote_state ();
9623 const char *remote_exec_file
= get_remote_exec_file ();
9625 /* If running asynchronously, register the target file descriptor
9626 with the event loop. */
9627 if (target_can_async_p ())
9630 /* Disable address space randomization if requested (and supported). */
9631 if (extended_remote_supports_disable_randomization (ops
))
9632 extended_remote_disable_randomization (disable_randomization
);
9634 /* If startup-with-shell is on, we inform gdbserver to start the
9635 remote inferior using a shell. */
9636 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
9638 xsnprintf (rs
->buf
, get_remote_packet_size (),
9639 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
9641 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9642 if (strcmp (rs
->buf
, "OK") != 0)
9644 Remote replied unexpectedly while setting startup-with-shell: %s"),
9648 extended_remote_environment_support (rs
);
9650 extended_remote_set_inferior_cwd (rs
);
9652 /* Now restart the remote server. */
9653 run_worked
= extended_remote_run (args
) != -1;
9656 /* vRun was not supported. Fail if we need it to do what the
9658 if (remote_exec_file
[0])
9659 error (_("Remote target does not support \"set remote exec-file\""));
9661 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9663 /* Fall back to "R". */
9664 extended_remote_restart ();
9667 if (!have_inferiors ())
9669 /* Clean up from the last time we ran, before we mark the target
9670 running again. This will mark breakpoints uninserted, and
9671 get_offsets may insert breakpoints. */
9672 init_thread_list ();
9673 init_wait_for_inferior ();
9676 /* vRun's success return is a stop reply. */
9677 stop_reply
= run_worked
? rs
->buf
: NULL
;
9678 add_current_inferior_and_thread (stop_reply
);
9680 /* Get updated offsets, if the stub uses qOffsets. */
9685 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9686 the list of conditions (in agent expression bytecode format), if any, the
9687 target needs to evaluate. The output is placed into the packet buffer
9688 started from BUF and ended at BUF_END. */
9691 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9692 struct bp_target_info
*bp_tgt
, char *buf
,
9695 if (bp_tgt
->conditions
.empty ())
9698 buf
+= strlen (buf
);
9699 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9702 /* Send conditions to the target. */
9703 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
9705 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9706 buf
+= strlen (buf
);
9707 for (int i
= 0; i
< aexpr
->len
; ++i
)
9708 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9715 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9716 struct bp_target_info
*bp_tgt
, char *buf
)
9718 if (bp_tgt
->tcommands
.empty ())
9721 buf
+= strlen (buf
);
9723 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9724 buf
+= strlen (buf
);
9726 /* Concatenate all the agent expressions that are commands into the
9728 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
9730 sprintf (buf
, "X%x,", aexpr
->len
);
9731 buf
+= strlen (buf
);
9732 for (int i
= 0; i
< aexpr
->len
; ++i
)
9733 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9738 /* Insert a breakpoint. On targets that have software breakpoint
9739 support, we ask the remote target to do the work; on targets
9740 which don't, we insert a traditional memory breakpoint. */
9743 remote_insert_breakpoint (struct target_ops
*ops
,
9744 struct gdbarch
*gdbarch
,
9745 struct bp_target_info
*bp_tgt
)
9747 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9748 If it succeeds, then set the support to PACKET_ENABLE. If it
9749 fails, and the user has explicitly requested the Z support then
9750 report an error, otherwise, mark it disabled and go on. */
9752 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9754 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9755 struct remote_state
*rs
;
9758 /* Make sure the remote is pointing at the right process, if
9760 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9761 set_general_process ();
9763 rs
= get_remote_state ();
9765 endbuf
= rs
->buf
+ get_remote_packet_size ();
9770 addr
= (ULONGEST
) remote_address_masked (addr
);
9771 p
+= hexnumstr (p
, addr
);
9772 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9774 if (remote_supports_cond_breakpoints (ops
))
9775 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9777 if (remote_can_run_breakpoint_commands (ops
))
9778 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9781 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9783 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9789 case PACKET_UNKNOWN
:
9794 /* If this breakpoint has target-side commands but this stub doesn't
9795 support Z0 packets, throw error. */
9796 if (!bp_tgt
->tcommands
.empty ())
9797 throw_error (NOT_SUPPORTED_ERROR
, _("\
9798 Target doesn't support breakpoints that have target side commands."));
9800 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9804 remote_remove_breakpoint (struct target_ops
*ops
,
9805 struct gdbarch
*gdbarch
,
9806 struct bp_target_info
*bp_tgt
,
9807 enum remove_bp_reason reason
)
9809 CORE_ADDR addr
= bp_tgt
->placed_address
;
9810 struct remote_state
*rs
= get_remote_state ();
9812 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9815 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9817 /* Make sure the remote is pointing at the right process, if
9819 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9820 set_general_process ();
9826 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9827 p
+= hexnumstr (p
, addr
);
9828 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9831 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9833 return (rs
->buf
[0] == 'E');
9836 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
, reason
);
9839 static enum Z_packet_type
9840 watchpoint_to_Z_packet (int type
)
9845 return Z_PACKET_WRITE_WP
;
9848 return Z_PACKET_READ_WP
;
9851 return Z_PACKET_ACCESS_WP
;
9854 internal_error (__FILE__
, __LINE__
,
9855 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9860 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9861 enum target_hw_bp_type type
, struct expression
*cond
)
9863 struct remote_state
*rs
= get_remote_state ();
9864 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9866 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9868 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9871 /* Make sure the remote is pointing at the right process, if
9873 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9874 set_general_process ();
9876 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9877 p
= strchr (rs
->buf
, '\0');
9878 addr
= remote_address_masked (addr
);
9879 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9880 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9883 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9885 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9889 case PACKET_UNKNOWN
:
9894 internal_error (__FILE__
, __LINE__
,
9895 _("remote_insert_watchpoint: reached end of function"));
9899 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9900 CORE_ADDR start
, int length
)
9902 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9904 return diff
< length
;
9909 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9910 enum target_hw_bp_type type
, struct expression
*cond
)
9912 struct remote_state
*rs
= get_remote_state ();
9913 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9915 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9917 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9920 /* Make sure the remote is pointing at the right process, if
9922 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9923 set_general_process ();
9925 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
9926 p
= strchr (rs
->buf
, '\0');
9927 addr
= remote_address_masked (addr
);
9928 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9929 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9931 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9933 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9936 case PACKET_UNKNOWN
:
9941 internal_error (__FILE__
, __LINE__
,
9942 _("remote_remove_watchpoint: reached end of function"));
9946 int remote_hw_watchpoint_limit
= -1;
9947 int remote_hw_watchpoint_length_limit
= -1;
9948 int remote_hw_breakpoint_limit
= -1;
9951 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
9952 CORE_ADDR addr
, int len
)
9954 if (remote_hw_watchpoint_length_limit
== 0)
9956 else if (remote_hw_watchpoint_length_limit
< 0)
9958 else if (len
<= remote_hw_watchpoint_length_limit
)
9965 remote_check_watch_resources (struct target_ops
*self
,
9966 enum bptype type
, int cnt
, int ot
)
9968 if (type
== bp_hardware_breakpoint
)
9970 if (remote_hw_breakpoint_limit
== 0)
9972 else if (remote_hw_breakpoint_limit
< 0)
9974 else if (cnt
<= remote_hw_breakpoint_limit
)
9979 if (remote_hw_watchpoint_limit
== 0)
9981 else if (remote_hw_watchpoint_limit
< 0)
9985 else if (cnt
<= remote_hw_watchpoint_limit
)
9991 /* The to_stopped_by_sw_breakpoint method of target remote. */
9994 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
9996 struct thread_info
*thread
= inferior_thread ();
9998 return (thread
->priv
!= NULL
9999 && (get_remote_thread_info (thread
)->stop_reason
10000 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10003 /* The to_supports_stopped_by_sw_breakpoint method of target
10007 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10009 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10012 /* The to_stopped_by_hw_breakpoint method of target remote. */
10015 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10017 struct thread_info
*thread
= inferior_thread ();
10019 return (thread
->priv
!= NULL
10020 && (get_remote_thread_info (thread
)->stop_reason
10021 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10024 /* The to_supports_stopped_by_hw_breakpoint method of target
10028 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10030 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10034 remote_stopped_by_watchpoint (struct target_ops
*ops
)
10036 struct thread_info
*thread
= inferior_thread ();
10038 return (thread
->priv
!= NULL
10039 && (get_remote_thread_info (thread
)->stop_reason
10040 == TARGET_STOPPED_BY_WATCHPOINT
));
10044 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
10046 struct thread_info
*thread
= inferior_thread ();
10048 if (thread
->priv
!= NULL
10049 && (get_remote_thread_info (thread
)->stop_reason
10050 == TARGET_STOPPED_BY_WATCHPOINT
))
10052 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10061 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10062 struct bp_target_info
*bp_tgt
)
10064 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10065 struct remote_state
*rs
;
10069 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10072 /* Make sure the remote is pointing at the right process, if
10074 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10075 set_general_process ();
10077 rs
= get_remote_state ();
10079 endbuf
= rs
->buf
+ get_remote_packet_size ();
10085 addr
= remote_address_masked (addr
);
10086 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10087 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10089 if (remote_supports_cond_breakpoints (self
))
10090 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10092 if (remote_can_run_breakpoint_commands (self
))
10093 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10096 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10098 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10101 if (rs
->buf
[1] == '.')
10103 message
= strchr (rs
->buf
+ 2, '.');
10105 error (_("Remote failure reply: %s"), message
+ 1);
10108 case PACKET_UNKNOWN
:
10113 internal_error (__FILE__
, __LINE__
,
10114 _("remote_insert_hw_breakpoint: reached end of function"));
10119 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10120 struct bp_target_info
*bp_tgt
)
10123 struct remote_state
*rs
= get_remote_state ();
10125 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10127 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10130 /* Make sure the remote is pointing at the right process, if
10132 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10133 set_general_process ();
10139 addr
= remote_address_masked (bp_tgt
->placed_address
);
10140 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10141 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10144 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10146 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10149 case PACKET_UNKNOWN
:
10154 internal_error (__FILE__
, __LINE__
,
10155 _("remote_remove_hw_breakpoint: reached end of function"));
10158 /* Verify memory using the "qCRC:" request. */
10161 remote_verify_memory (struct target_ops
*ops
,
10162 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10164 struct remote_state
*rs
= get_remote_state ();
10165 unsigned long host_crc
, target_crc
;
10168 /* It doesn't make sense to use qCRC if the remote target is
10169 connected but not running. */
10170 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10172 enum packet_result result
;
10174 /* Make sure the remote is pointing at the right process. */
10175 set_general_process ();
10177 /* FIXME: assumes lma can fit into long. */
10178 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10179 (long) lma
, (long) size
);
10182 /* Be clever; compute the host_crc before waiting for target
10184 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10186 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10188 result
= packet_ok (rs
->buf
,
10189 &remote_protocol_packets
[PACKET_qCRC
]);
10190 if (result
== PACKET_ERROR
)
10192 else if (result
== PACKET_OK
)
10194 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10195 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10197 return (host_crc
== target_crc
);
10201 return simple_verify_memory (ops
, data
, lma
, size
);
10204 /* compare-sections command
10206 With no arguments, compares each loadable section in the exec bfd
10207 with the same memory range on the target, and reports mismatches.
10208 Useful for verifying the image on the target against the exec file. */
10211 compare_sections_command (const char *args
, int from_tty
)
10214 const char *sectname
;
10215 bfd_size_type size
;
10218 int mismatched
= 0;
10223 error (_("command cannot be used without an exec file"));
10225 /* Make sure the remote is pointing at the right process. */
10226 set_general_process ();
10228 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10234 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10236 if (!(s
->flags
& SEC_LOAD
))
10237 continue; /* Skip non-loadable section. */
10239 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10240 continue; /* Skip writeable sections */
10242 size
= bfd_get_section_size (s
);
10244 continue; /* Skip zero-length section. */
10246 sectname
= bfd_get_section_name (exec_bfd
, s
);
10247 if (args
&& strcmp (args
, sectname
) != 0)
10248 continue; /* Not the section selected by user. */
10250 matched
= 1; /* Do this section. */
10253 gdb::byte_vector
sectdata (size
);
10254 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10256 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10259 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10260 paddress (target_gdbarch (), lma
),
10261 paddress (target_gdbarch (), lma
+ size
));
10263 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10264 paddress (target_gdbarch (), lma
),
10265 paddress (target_gdbarch (), lma
+ size
));
10267 printf_filtered ("matched.\n");
10270 printf_filtered ("MIS-MATCHED!\n");
10274 if (mismatched
> 0)
10275 warning (_("One or more sections of the target image does not match\n\
10276 the loaded file\n"));
10277 if (args
&& !matched
)
10278 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10281 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10282 into remote target. The number of bytes written to the remote
10283 target is returned, or -1 for error. */
10285 static enum target_xfer_status
10286 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
10287 const char *annex
, const gdb_byte
*writebuf
,
10288 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
10289 struct packet_config
*packet
)
10293 struct remote_state
*rs
= get_remote_state ();
10294 int max_size
= get_memory_write_packet_size ();
10296 if (packet_config_support (packet
) == PACKET_DISABLE
)
10297 return TARGET_XFER_E_IO
;
10299 /* Insert header. */
10300 i
= snprintf (rs
->buf
, max_size
,
10301 "qXfer:%s:write:%s:%s:",
10302 object_name
, annex
? annex
: "",
10303 phex_nz (offset
, sizeof offset
));
10304 max_size
-= (i
+ 1);
10306 /* Escape as much data as fits into rs->buf. */
10307 buf_len
= remote_escape_output
10308 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10310 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10311 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10312 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10313 return TARGET_XFER_E_IO
;
10315 unpack_varlen_hex (rs
->buf
, &n
);
10318 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10321 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10322 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10323 number of bytes read is returned, or 0 for EOF, or -1 for error.
10324 The number of bytes read may be less than LEN without indicating an
10325 EOF. PACKET is checked and updated to indicate whether the remote
10326 target supports this object. */
10328 static enum target_xfer_status
10329 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
10331 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
10332 ULONGEST
*xfered_len
,
10333 struct packet_config
*packet
)
10335 struct remote_state
*rs
= get_remote_state ();
10336 LONGEST i
, n
, packet_len
;
10338 if (packet_config_support (packet
) == PACKET_DISABLE
)
10339 return TARGET_XFER_E_IO
;
10341 /* Check whether we've cached an end-of-object packet that matches
10343 if (rs
->finished_object
)
10345 if (strcmp (object_name
, rs
->finished_object
) == 0
10346 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10347 && offset
== rs
->finished_offset
)
10348 return TARGET_XFER_EOF
;
10351 /* Otherwise, we're now reading something different. Discard
10353 xfree (rs
->finished_object
);
10354 xfree (rs
->finished_annex
);
10355 rs
->finished_object
= NULL
;
10356 rs
->finished_annex
= NULL
;
10359 /* Request only enough to fit in a single packet. The actual data
10360 may not, since we don't know how much of it will need to be escaped;
10361 the target is free to respond with slightly less data. We subtract
10362 five to account for the response type and the protocol frame. */
10363 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10364 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10365 object_name
, annex
? annex
: "",
10366 phex_nz (offset
, sizeof offset
),
10367 phex_nz (n
, sizeof n
));
10368 i
= putpkt (rs
->buf
);
10370 return TARGET_XFER_E_IO
;
10373 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10374 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10375 return TARGET_XFER_E_IO
;
10377 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10378 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10380 /* 'm' means there is (or at least might be) more data after this
10381 batch. That does not make sense unless there's at least one byte
10382 of data in this reply. */
10383 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10384 error (_("Remote qXfer reply contained no data."));
10386 /* Got some data. */
10387 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10388 packet_len
- 1, readbuf
, n
);
10390 /* 'l' is an EOF marker, possibly including a final block of data,
10391 or possibly empty. If we have the final block of a non-empty
10392 object, record this fact to bypass a subsequent partial read. */
10393 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10395 rs
->finished_object
= xstrdup (object_name
);
10396 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10397 rs
->finished_offset
= offset
+ i
;
10401 return TARGET_XFER_EOF
;
10405 return TARGET_XFER_OK
;
10409 static enum target_xfer_status
10410 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
10411 const char *annex
, gdb_byte
*readbuf
,
10412 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10413 ULONGEST
*xfered_len
)
10415 struct remote_state
*rs
;
10419 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10421 set_remote_traceframe ();
10422 set_general_thread (inferior_ptid
);
10424 rs
= get_remote_state ();
10426 /* Handle memory using the standard memory routines. */
10427 if (object
== TARGET_OBJECT_MEMORY
)
10429 /* If the remote target is connected but not running, we should
10430 pass this request down to a lower stratum (e.g. the executable
10432 if (!target_has_execution
)
10433 return TARGET_XFER_EOF
;
10435 if (writebuf
!= NULL
)
10436 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10439 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10443 /* Handle SPU memory using qxfer packets. */
10444 if (object
== TARGET_OBJECT_SPU
)
10447 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10448 xfered_len
, &remote_protocol_packets
10449 [PACKET_qXfer_spu_read
]);
10451 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10452 xfered_len
, &remote_protocol_packets
10453 [PACKET_qXfer_spu_write
]);
10456 /* Handle extra signal info using qxfer packets. */
10457 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10460 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10461 xfered_len
, &remote_protocol_packets
10462 [PACKET_qXfer_siginfo_read
]);
10464 return remote_write_qxfer (ops
, "siginfo", annex
,
10465 writebuf
, offset
, len
, xfered_len
,
10466 &remote_protocol_packets
10467 [PACKET_qXfer_siginfo_write
]);
10470 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10473 return remote_read_qxfer (ops
, "statictrace", annex
,
10474 readbuf
, offset
, len
, xfered_len
,
10475 &remote_protocol_packets
10476 [PACKET_qXfer_statictrace_read
]);
10478 return TARGET_XFER_E_IO
;
10481 /* Only handle flash writes. */
10482 if (writebuf
!= NULL
)
10486 case TARGET_OBJECT_FLASH
:
10487 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10491 return TARGET_XFER_E_IO
;
10495 /* Map pre-existing objects onto letters. DO NOT do this for new
10496 objects!!! Instead specify new query packets. */
10499 case TARGET_OBJECT_AVR
:
10503 case TARGET_OBJECT_AUXV
:
10504 gdb_assert (annex
== NULL
);
10505 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10507 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10509 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10510 return remote_read_qxfer
10511 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10512 &remote_protocol_packets
[PACKET_qXfer_features
]);
10514 case TARGET_OBJECT_LIBRARIES
:
10515 return remote_read_qxfer
10516 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10517 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10519 case TARGET_OBJECT_LIBRARIES_SVR4
:
10520 return remote_read_qxfer
10521 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10522 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10524 case TARGET_OBJECT_MEMORY_MAP
:
10525 gdb_assert (annex
== NULL
);
10526 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10528 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10530 case TARGET_OBJECT_OSDATA
:
10531 /* Should only get here if we're connected. */
10532 gdb_assert (rs
->remote_desc
);
10533 return remote_read_qxfer
10534 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10535 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10537 case TARGET_OBJECT_THREADS
:
10538 gdb_assert (annex
== NULL
);
10539 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10541 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10543 case TARGET_OBJECT_TRACEFRAME_INFO
:
10544 gdb_assert (annex
== NULL
);
10545 return remote_read_qxfer
10546 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10547 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10549 case TARGET_OBJECT_FDPIC
:
10550 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10552 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10554 case TARGET_OBJECT_OPENVMS_UIB
:
10555 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10557 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10559 case TARGET_OBJECT_BTRACE
:
10560 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10562 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10564 case TARGET_OBJECT_BTRACE_CONF
:
10565 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10567 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10569 case TARGET_OBJECT_EXEC_FILE
:
10570 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10572 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10575 return TARGET_XFER_E_IO
;
10578 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10579 large enough let the caller deal with it. */
10580 if (len
< get_remote_packet_size ())
10581 return TARGET_XFER_E_IO
;
10582 len
= get_remote_packet_size ();
10584 /* Except for querying the minimum buffer size, target must be open. */
10585 if (!rs
->remote_desc
)
10586 error (_("remote query is only available after target open"));
10588 gdb_assert (annex
!= NULL
);
10589 gdb_assert (readbuf
!= NULL
);
10593 *p2
++ = query_type
;
10595 /* We used one buffer char for the remote protocol q command and
10596 another for the query type. As the remote protocol encapsulation
10597 uses 4 chars plus one extra in case we are debugging
10598 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10601 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10603 /* Bad caller may have sent forbidden characters. */
10604 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10609 gdb_assert (annex
[i
] == '\0');
10611 i
= putpkt (rs
->buf
);
10613 return TARGET_XFER_E_IO
;
10615 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10616 strcpy ((char *) readbuf
, rs
->buf
);
10618 *xfered_len
= strlen ((char *) readbuf
);
10619 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10622 /* Implementation of to_get_memory_xfer_limit. */
10625 remote_get_memory_xfer_limit (struct target_ops
*ops
)
10627 return get_memory_write_packet_size ();
10631 remote_search_memory (struct target_ops
* ops
,
10632 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10633 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10634 CORE_ADDR
*found_addrp
)
10636 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10637 struct remote_state
*rs
= get_remote_state ();
10638 int max_size
= get_memory_write_packet_size ();
10639 struct packet_config
*packet
=
10640 &remote_protocol_packets
[PACKET_qSearch_memory
];
10641 /* Number of packet bytes used to encode the pattern;
10642 this could be more than PATTERN_LEN due to escape characters. */
10643 int escaped_pattern_len
;
10644 /* Amount of pattern that was encodable in the packet. */
10645 int used_pattern_len
;
10648 ULONGEST found_addr
;
10650 /* Don't go to the target if we don't have to. This is done before
10651 checking packet_config_support to avoid the possibility that a
10652 success for this edge case means the facility works in
10654 if (pattern_len
> search_space_len
)
10656 if (pattern_len
== 0)
10658 *found_addrp
= start_addr
;
10662 /* If we already know the packet isn't supported, fall back to the simple
10663 way of searching memory. */
10665 if (packet_config_support (packet
) == PACKET_DISABLE
)
10667 /* Target doesn't provided special support, fall back and use the
10668 standard support (copy memory and do the search here). */
10669 return simple_search_memory (ops
, start_addr
, search_space_len
,
10670 pattern
, pattern_len
, found_addrp
);
10673 /* Make sure the remote is pointing at the right process. */
10674 set_general_process ();
10676 /* Insert header. */
10677 i
= snprintf (rs
->buf
, max_size
,
10678 "qSearch:memory:%s;%s;",
10679 phex_nz (start_addr
, addr_size
),
10680 phex_nz (search_space_len
, sizeof (search_space_len
)));
10681 max_size
-= (i
+ 1);
10683 /* Escape as much data as fits into rs->buf. */
10684 escaped_pattern_len
=
10685 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10686 &used_pattern_len
, max_size
);
10688 /* Bail if the pattern is too large. */
10689 if (used_pattern_len
!= pattern_len
)
10690 error (_("Pattern is too large to transmit to remote target."));
10692 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10693 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10694 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10696 /* The request may not have worked because the command is not
10697 supported. If so, fall back to the simple way. */
10698 if (packet_config_support (packet
) == PACKET_DISABLE
)
10700 return simple_search_memory (ops
, start_addr
, search_space_len
,
10701 pattern
, pattern_len
, found_addrp
);
10706 if (rs
->buf
[0] == '0')
10708 else if (rs
->buf
[0] == '1')
10711 if (rs
->buf
[1] != ',')
10712 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10713 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10714 *found_addrp
= found_addr
;
10717 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10723 remote_rcmd (struct target_ops
*self
, const char *command
,
10724 struct ui_file
*outbuf
)
10726 struct remote_state
*rs
= get_remote_state ();
10729 if (!rs
->remote_desc
)
10730 error (_("remote rcmd is only available after target open"));
10732 /* Send a NULL command across as an empty command. */
10733 if (command
== NULL
)
10736 /* The query prefix. */
10737 strcpy (rs
->buf
, "qRcmd,");
10738 p
= strchr (rs
->buf
, '\0');
10740 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10741 > get_remote_packet_size ())
10742 error (_("\"monitor\" command ``%s'' is too long."), command
);
10744 /* Encode the actual command. */
10745 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10747 if (putpkt (rs
->buf
) < 0)
10748 error (_("Communication problem with target."));
10750 /* get/display the response */
10755 /* XXX - see also remote_get_noisy_reply(). */
10756 QUIT
; /* Allow user to bail out with ^C. */
10758 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10760 /* Timeout. Continue to (try to) read responses.
10761 This is better than stopping with an error, assuming the stub
10762 is still executing the (long) monitor command.
10763 If needed, the user can interrupt gdb using C-c, obtaining
10764 an effect similar to stop on timeout. */
10768 if (buf
[0] == '\0')
10769 error (_("Target does not support this command."));
10770 if (buf
[0] == 'O' && buf
[1] != 'K')
10772 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10775 if (strcmp (buf
, "OK") == 0)
10777 if (strlen (buf
) == 3 && buf
[0] == 'E'
10778 && isdigit (buf
[1]) && isdigit (buf
[2]))
10780 error (_("Protocol error with Rcmd"));
10782 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10784 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10786 fputc_unfiltered (c
, outbuf
);
10792 static std::vector
<mem_region
>
10793 remote_memory_map (struct target_ops
*ops
)
10795 std::vector
<mem_region
> result
;
10796 gdb::optional
<gdb::char_vector
> text
10797 = target_read_stralloc (¤t_target
, TARGET_OBJECT_MEMORY_MAP
, NULL
);
10800 result
= parse_memory_map (text
->data ());
10806 packet_command (const char *args
, int from_tty
)
10808 struct remote_state
*rs
= get_remote_state ();
10810 if (!rs
->remote_desc
)
10811 error (_("command can only be used with remote target"));
10814 error (_("remote-packet command requires packet text as argument"));
10816 puts_filtered ("sending: ");
10817 print_packet (args
);
10818 puts_filtered ("\n");
10821 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10822 puts_filtered ("received: ");
10823 print_packet (rs
->buf
);
10824 puts_filtered ("\n");
10828 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10830 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10832 static void threadset_test_cmd (char *cmd
, int tty
);
10834 static void threadalive_test (char *cmd
, int tty
);
10836 static void threadlist_test_cmd (char *cmd
, int tty
);
10838 int get_and_display_threadinfo (threadref
*ref
);
10840 static void threadinfo_test_cmd (char *cmd
, int tty
);
10842 static int thread_display_step (threadref
*ref
, void *context
);
10844 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10846 static void init_remote_threadtests (void);
10848 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10851 threadset_test_cmd (const char *cmd
, int tty
)
10853 int sample_thread
= SAMPLE_THREAD
;
10855 printf_filtered (_("Remote threadset test\n"));
10856 set_general_thread (sample_thread
);
10861 threadalive_test (const char *cmd
, int tty
)
10863 int sample_thread
= SAMPLE_THREAD
;
10864 int pid
= ptid_get_pid (inferior_ptid
);
10865 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10867 if (remote_thread_alive (ptid
))
10868 printf_filtered ("PASS: Thread alive test\n");
10870 printf_filtered ("FAIL: Thread alive test\n");
10873 void output_threadid (char *title
, threadref
*ref
);
10876 output_threadid (char *title
, threadref
*ref
)
10880 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10882 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10886 threadlist_test_cmd (const char *cmd
, int tty
)
10889 threadref nextthread
;
10890 int done
, result_count
;
10891 threadref threadlist
[3];
10893 printf_filtered ("Remote Threadlist test\n");
10894 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10895 &result_count
, &threadlist
[0]))
10896 printf_filtered ("FAIL: threadlist test\n");
10899 threadref
*scan
= threadlist
;
10900 threadref
*limit
= scan
+ result_count
;
10902 while (scan
< limit
)
10903 output_threadid (" thread ", scan
++);
10908 display_thread_info (struct gdb_ext_thread_info
*info
)
10910 output_threadid ("Threadid: ", &info
->threadid
);
10911 printf_filtered ("Name: %s\n ", info
->shortname
);
10912 printf_filtered ("State: %s\n", info
->display
);
10913 printf_filtered ("other: %s\n\n", info
->more_display
);
10917 get_and_display_threadinfo (threadref
*ref
)
10921 struct gdb_ext_thread_info threadinfo
;
10923 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
10924 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
10925 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
10926 display_thread_info (&threadinfo
);
10931 threadinfo_test_cmd (const char *cmd
, int tty
)
10933 int athread
= SAMPLE_THREAD
;
10937 int_to_threadref (&thread
, athread
);
10938 printf_filtered ("Remote Threadinfo test\n");
10939 if (!get_and_display_threadinfo (&thread
))
10940 printf_filtered ("FAIL cannot get thread info\n");
10944 thread_display_step (threadref
*ref
, void *context
)
10946 /* output_threadid(" threadstep ",ref); *//* simple test */
10947 return get_and_display_threadinfo (ref
);
10951 threadlist_update_test_cmd (const char *cmd
, int tty
)
10953 printf_filtered ("Remote Threadlist update test\n");
10954 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
10958 init_remote_threadtests (void)
10960 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
10961 _("Fetch and print the remote list of "
10962 "thread identifiers, one pkt only"));
10963 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
10964 _("Fetch and display info about one thread"));
10965 add_com ("tset", class_obscure
, threadset_test_cmd
,
10966 _("Test setting to a different thread"));
10967 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
10968 _("Iterate through updating all remote thread info"));
10969 add_com ("talive", class_obscure
, threadalive_test
,
10970 _(" Remote thread alive test "));
10975 /* Convert a thread ID to a string. Returns the string in a static
10978 static const char *
10979 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
10981 static char buf
[64];
10982 struct remote_state
*rs
= get_remote_state ();
10984 if (ptid_equal (ptid
, null_ptid
))
10985 return normal_pid_to_str (ptid
);
10986 else if (ptid_is_pid (ptid
))
10988 /* Printing an inferior target id. */
10990 /* When multi-process extensions are off, there's no way in the
10991 remote protocol to know the remote process id, if there's any
10992 at all. There's one exception --- when we're connected with
10993 target extended-remote, and we manually attached to a process
10994 with "attach PID". We don't record anywhere a flag that
10995 allows us to distinguish that case from the case of
10996 connecting with extended-remote and the stub already being
10997 attached to a process, and reporting yes to qAttached, hence
10998 no smart special casing here. */
10999 if (!remote_multi_process_p (rs
))
11001 xsnprintf (buf
, sizeof buf
, "Remote target");
11005 return normal_pid_to_str (ptid
);
11009 if (ptid_equal (magic_null_ptid
, ptid
))
11010 xsnprintf (buf
, sizeof buf
, "Thread <main>");
11011 else if (remote_multi_process_p (rs
))
11012 if (ptid_get_lwp (ptid
) == 0)
11013 return normal_pid_to_str (ptid
);
11015 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
11016 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
11018 xsnprintf (buf
, sizeof buf
, "Thread %ld",
11019 ptid_get_lwp (ptid
));
11024 /* Get the address of the thread local variable in OBJFILE which is
11025 stored at OFFSET within the thread local storage for thread PTID. */
11028 remote_get_thread_local_address (struct target_ops
*ops
,
11029 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
11031 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11033 struct remote_state
*rs
= get_remote_state ();
11035 char *endp
= rs
->buf
+ get_remote_packet_size ();
11036 enum packet_result result
;
11038 strcpy (p
, "qGetTLSAddr:");
11040 p
= write_ptid (p
, endp
, ptid
);
11042 p
+= hexnumstr (p
, offset
);
11044 p
+= hexnumstr (p
, lm
);
11048 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11049 result
= packet_ok (rs
->buf
,
11050 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11051 if (result
== PACKET_OK
)
11055 unpack_varlen_hex (rs
->buf
, &result
);
11058 else if (result
== PACKET_UNKNOWN
)
11059 throw_error (TLS_GENERIC_ERROR
,
11060 _("Remote target doesn't support qGetTLSAddr packet"));
11062 throw_error (TLS_GENERIC_ERROR
,
11063 _("Remote target failed to process qGetTLSAddr request"));
11066 throw_error (TLS_GENERIC_ERROR
,
11067 _("TLS not supported or disabled on this target"));
11072 /* Provide thread local base, i.e. Thread Information Block address.
11073 Returns 1 if ptid is found and thread_local_base is non zero. */
11076 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
11078 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11080 struct remote_state
*rs
= get_remote_state ();
11082 char *endp
= rs
->buf
+ get_remote_packet_size ();
11083 enum packet_result result
;
11085 strcpy (p
, "qGetTIBAddr:");
11087 p
= write_ptid (p
, endp
, ptid
);
11091 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11092 result
= packet_ok (rs
->buf
,
11093 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11094 if (result
== PACKET_OK
)
11098 unpack_varlen_hex (rs
->buf
, &result
);
11100 *addr
= (CORE_ADDR
) result
;
11103 else if (result
== PACKET_UNKNOWN
)
11104 error (_("Remote target doesn't support qGetTIBAddr packet"));
11106 error (_("Remote target failed to process qGetTIBAddr request"));
11109 error (_("qGetTIBAddr not supported or disabled on this target"));
11114 /* Support for inferring a target description based on the current
11115 architecture and the size of a 'g' packet. While the 'g' packet
11116 can have any size (since optional registers can be left off the
11117 end), some sizes are easily recognizable given knowledge of the
11118 approximate architecture. */
11120 struct remote_g_packet_guess
11123 const struct target_desc
*tdesc
;
11125 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
11126 DEF_VEC_O(remote_g_packet_guess_s
);
11128 struct remote_g_packet_data
11130 VEC(remote_g_packet_guess_s
) *guesses
;
11133 static struct gdbarch_data
*remote_g_packet_data_handle
;
11136 remote_g_packet_data_init (struct obstack
*obstack
)
11138 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
11142 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11143 const struct target_desc
*tdesc
)
11145 struct remote_g_packet_data
*data
11146 = ((struct remote_g_packet_data
*)
11147 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11148 struct remote_g_packet_guess new_guess
, *guess
;
11151 gdb_assert (tdesc
!= NULL
);
11154 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11156 if (guess
->bytes
== bytes
)
11157 internal_error (__FILE__
, __LINE__
,
11158 _("Duplicate g packet description added for size %d"),
11161 new_guess
.bytes
= bytes
;
11162 new_guess
.tdesc
= tdesc
;
11163 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
11166 /* Return 1 if remote_read_description would do anything on this target
11167 and architecture, 0 otherwise. */
11170 remote_read_description_p (struct target_ops
*target
)
11172 struct remote_g_packet_data
*data
11173 = ((struct remote_g_packet_data
*)
11174 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11176 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11182 static const struct target_desc
*
11183 remote_read_description (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 /* Do not try this during initial connection, when we do not know
11190 whether there is a running but stopped thread. */
11191 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
11192 return target
->beneath
->to_read_description (target
->beneath
);
11194 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11196 struct remote_g_packet_guess
*guess
;
11198 int bytes
= send_g_packet ();
11201 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11203 if (guess
->bytes
== bytes
)
11204 return guess
->tdesc
;
11206 /* We discard the g packet. A minor optimization would be to
11207 hold on to it, and fill the register cache once we have selected
11208 an architecture, but it's too tricky to do safely. */
11211 return target
->beneath
->to_read_description (target
->beneath
);
11214 /* Remote file transfer support. This is host-initiated I/O, not
11215 target-initiated; for target-initiated, see remote-fileio.c. */
11217 /* If *LEFT is at least the length of STRING, copy STRING to
11218 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11219 decrease *LEFT. Otherwise raise an error. */
11222 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11224 int len
= strlen (string
);
11227 error (_("Packet too long for target."));
11229 memcpy (*buffer
, string
, len
);
11233 /* NUL-terminate the buffer as a convenience, if there is
11239 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11240 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11241 decrease *LEFT. Otherwise raise an error. */
11244 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11247 if (2 * len
> *left
)
11248 error (_("Packet too long for target."));
11250 bin2hex (bytes
, *buffer
, len
);
11251 *buffer
+= 2 * len
;
11254 /* NUL-terminate the buffer as a convenience, if there is
11260 /* If *LEFT is large enough, convert VALUE to hex and add it to
11261 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11262 decrease *LEFT. Otherwise raise an error. */
11265 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11267 int len
= hexnumlen (value
);
11270 error (_("Packet too long for target."));
11272 hexnumstr (*buffer
, value
);
11276 /* NUL-terminate the buffer as a convenience, if there is
11282 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11283 value, *REMOTE_ERRNO to the remote error number or zero if none
11284 was included, and *ATTACHMENT to point to the start of the annex
11285 if any. The length of the packet isn't needed here; there may
11286 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11288 Return 0 if the packet could be parsed, -1 if it could not. If
11289 -1 is returned, the other variables may not be initialized. */
11292 remote_hostio_parse_result (char *buffer
, int *retcode
,
11293 int *remote_errno
, char **attachment
)
11298 *attachment
= NULL
;
11300 if (buffer
[0] != 'F')
11304 *retcode
= strtol (&buffer
[1], &p
, 16);
11305 if (errno
!= 0 || p
== &buffer
[1])
11308 /* Check for ",errno". */
11312 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11313 if (errno
!= 0 || p
+ 1 == p2
)
11318 /* Check for ";attachment". If there is no attachment, the
11319 packet should end here. */
11322 *attachment
= p
+ 1;
11325 else if (*p
== '\0')
11331 /* Send a prepared I/O packet to the target and read its response.
11332 The prepared packet is in the global RS->BUF before this function
11333 is called, and the answer is there when we return.
11335 COMMAND_BYTES is the length of the request to send, which may include
11336 binary data. WHICH_PACKET is the packet configuration to check
11337 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11338 is set to the error number and -1 is returned. Otherwise the value
11339 returned by the function is returned.
11341 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11342 attachment is expected; an error will be reported if there's a
11343 mismatch. If one is found, *ATTACHMENT will be set to point into
11344 the packet buffer and *ATTACHMENT_LEN will be set to the
11345 attachment's length. */
11348 remote_hostio_send_command (int command_bytes
, int which_packet
,
11349 int *remote_errno
, char **attachment
,
11350 int *attachment_len
)
11352 struct remote_state
*rs
= get_remote_state ();
11353 int ret
, bytes_read
;
11354 char *attachment_tmp
;
11356 if (packet_support (which_packet
) == PACKET_DISABLE
)
11358 *remote_errno
= FILEIO_ENOSYS
;
11362 putpkt_binary (rs
->buf
, command_bytes
);
11363 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11365 /* If it timed out, something is wrong. Don't try to parse the
11367 if (bytes_read
< 0)
11369 *remote_errno
= FILEIO_EINVAL
;
11373 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11376 *remote_errno
= FILEIO_EINVAL
;
11378 case PACKET_UNKNOWN
:
11379 *remote_errno
= FILEIO_ENOSYS
;
11385 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11388 *remote_errno
= FILEIO_EINVAL
;
11392 /* Make sure we saw an attachment if and only if we expected one. */
11393 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11394 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11396 *remote_errno
= FILEIO_EINVAL
;
11400 /* If an attachment was found, it must point into the packet buffer;
11401 work out how many bytes there were. */
11402 if (attachment_tmp
!= NULL
)
11404 *attachment
= attachment_tmp
;
11405 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11411 /* Invalidate the readahead cache. */
11414 readahead_cache_invalidate (void)
11416 struct remote_state
*rs
= get_remote_state ();
11418 rs
->readahead_cache
.fd
= -1;
11421 /* Invalidate the readahead cache if it is holding data for FD. */
11424 readahead_cache_invalidate_fd (int fd
)
11426 struct remote_state
*rs
= get_remote_state ();
11428 if (rs
->readahead_cache
.fd
== fd
)
11429 rs
->readahead_cache
.fd
= -1;
11432 /* Set the filesystem remote_hostio functions that take FILENAME
11433 arguments will use. Return 0 on success, or -1 if an error
11434 occurs (and set *REMOTE_ERRNO). */
11437 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11439 struct remote_state
*rs
= get_remote_state ();
11440 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11442 int left
= get_remote_packet_size () - 1;
11446 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11449 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11452 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11454 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11455 remote_buffer_add_string (&p
, &left
, arg
);
11457 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11458 remote_errno
, NULL
, NULL
);
11460 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11464 rs
->fs_pid
= required_pid
;
11469 /* Implementation of to_fileio_open. */
11472 remote_hostio_open (struct target_ops
*self
,
11473 struct inferior
*inf
, const char *filename
,
11474 int flags
, int mode
, int warn_if_slow
,
11477 struct remote_state
*rs
= get_remote_state ();
11479 int left
= get_remote_packet_size () - 1;
11483 static int warning_issued
= 0;
11485 printf_unfiltered (_("Reading %s from remote target...\n"),
11488 if (!warning_issued
)
11490 warning (_("File transfers from remote targets can be slow."
11491 " Use \"set sysroot\" to access files locally"
11493 warning_issued
= 1;
11497 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11500 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11502 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11503 strlen (filename
));
11504 remote_buffer_add_string (&p
, &left
, ",");
11506 remote_buffer_add_int (&p
, &left
, flags
);
11507 remote_buffer_add_string (&p
, &left
, ",");
11509 remote_buffer_add_int (&p
, &left
, mode
);
11511 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11512 remote_errno
, NULL
, NULL
);
11515 /* Implementation of to_fileio_pwrite. */
11518 remote_hostio_pwrite (struct target_ops
*self
,
11519 int fd
, const gdb_byte
*write_buf
, int len
,
11520 ULONGEST offset
, int *remote_errno
)
11522 struct remote_state
*rs
= get_remote_state ();
11524 int left
= get_remote_packet_size ();
11527 readahead_cache_invalidate_fd (fd
);
11529 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11531 remote_buffer_add_int (&p
, &left
, fd
);
11532 remote_buffer_add_string (&p
, &left
, ",");
11534 remote_buffer_add_int (&p
, &left
, offset
);
11535 remote_buffer_add_string (&p
, &left
, ",");
11537 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11538 get_remote_packet_size () - (p
- rs
->buf
));
11540 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11541 remote_errno
, NULL
, NULL
);
11544 /* Helper for the implementation of to_fileio_pread. Read the file
11545 from the remote side with vFile:pread. */
11548 remote_hostio_pread_vFile (struct target_ops
*self
,
11549 int fd
, gdb_byte
*read_buf
, int len
,
11550 ULONGEST offset
, int *remote_errno
)
11552 struct remote_state
*rs
= get_remote_state ();
11555 int left
= get_remote_packet_size ();
11556 int ret
, attachment_len
;
11559 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11561 remote_buffer_add_int (&p
, &left
, fd
);
11562 remote_buffer_add_string (&p
, &left
, ",");
11564 remote_buffer_add_int (&p
, &left
, len
);
11565 remote_buffer_add_string (&p
, &left
, ",");
11567 remote_buffer_add_int (&p
, &left
, offset
);
11569 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11570 remote_errno
, &attachment
,
11576 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11578 if (read_len
!= ret
)
11579 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11584 /* Serve pread from the readahead cache. Returns number of bytes
11585 read, or 0 if the request can't be served from the cache. */
11588 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11589 int fd
, gdb_byte
*read_buf
, size_t len
,
11592 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11594 if (cache
->fd
== fd
11595 && cache
->offset
<= offset
11596 && offset
< cache
->offset
+ cache
->bufsize
)
11598 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11600 if (offset
+ len
> max
)
11601 len
= max
- offset
;
11603 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11610 /* Implementation of to_fileio_pread. */
11613 remote_hostio_pread (struct target_ops
*self
,
11614 int fd
, gdb_byte
*read_buf
, int len
,
11615 ULONGEST offset
, int *remote_errno
)
11618 struct remote_state
*rs
= get_remote_state ();
11619 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11621 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11624 cache
->hit_count
++;
11627 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11628 pulongest (cache
->hit_count
));
11632 cache
->miss_count
++;
11634 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11635 pulongest (cache
->miss_count
));
11638 cache
->offset
= offset
;
11639 cache
->bufsize
= get_remote_packet_size ();
11640 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11642 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11643 cache
->offset
, remote_errno
);
11646 readahead_cache_invalidate_fd (fd
);
11650 cache
->bufsize
= ret
;
11651 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11654 /* Implementation of to_fileio_close. */
11657 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11659 struct remote_state
*rs
= get_remote_state ();
11661 int left
= get_remote_packet_size () - 1;
11663 readahead_cache_invalidate_fd (fd
);
11665 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11667 remote_buffer_add_int (&p
, &left
, fd
);
11669 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11670 remote_errno
, NULL
, NULL
);
11673 /* Implementation of to_fileio_unlink. */
11676 remote_hostio_unlink (struct target_ops
*self
,
11677 struct inferior
*inf
, const char *filename
,
11680 struct remote_state
*rs
= get_remote_state ();
11682 int left
= get_remote_packet_size () - 1;
11684 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11687 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11689 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11690 strlen (filename
));
11692 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11693 remote_errno
, NULL
, NULL
);
11696 /* Implementation of to_fileio_readlink. */
11698 static gdb::optional
<std::string
>
11699 remote_hostio_readlink (struct target_ops
*self
,
11700 struct inferior
*inf
, const char *filename
,
11703 struct remote_state
*rs
= get_remote_state ();
11706 int left
= get_remote_packet_size ();
11707 int len
, attachment_len
;
11710 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11713 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11715 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11716 strlen (filename
));
11718 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11719 remote_errno
, &attachment
,
11725 std::string
ret (len
, '\0');
11727 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11728 (gdb_byte
*) &ret
[0], len
);
11729 if (read_len
!= len
)
11730 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11735 /* Implementation of to_fileio_fstat. */
11738 remote_hostio_fstat (struct target_ops
*self
,
11739 int fd
, struct stat
*st
,
11742 struct remote_state
*rs
= get_remote_state ();
11744 int left
= get_remote_packet_size ();
11745 int attachment_len
, ret
;
11747 struct fio_stat fst
;
11750 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11752 remote_buffer_add_int (&p
, &left
, fd
);
11754 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11755 remote_errno
, &attachment
,
11759 if (*remote_errno
!= FILEIO_ENOSYS
)
11762 /* Strictly we should return -1, ENOSYS here, but when
11763 "set sysroot remote:" was implemented in August 2008
11764 BFD's need for a stat function was sidestepped with
11765 this hack. This was not remedied until March 2015
11766 so we retain the previous behavior to avoid breaking
11769 Note that the memset is a March 2015 addition; older
11770 GDBs set st_size *and nothing else* so the structure
11771 would have garbage in all other fields. This might
11772 break something but retaining the previous behavior
11773 here would be just too wrong. */
11775 memset (st
, 0, sizeof (struct stat
));
11776 st
->st_size
= INT_MAX
;
11780 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11781 (gdb_byte
*) &fst
, sizeof (fst
));
11783 if (read_len
!= ret
)
11784 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11786 if (read_len
!= sizeof (fst
))
11787 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11788 read_len
, (int) sizeof (fst
));
11790 remote_fileio_to_host_stat (&fst
, st
);
11795 /* Implementation of to_filesystem_is_local. */
11798 remote_filesystem_is_local (struct target_ops
*self
)
11800 /* Valgrind GDB presents itself as a remote target but works
11801 on the local filesystem: it does not implement remote get
11802 and users are not expected to set a sysroot. To handle
11803 this case we treat the remote filesystem as local if the
11804 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11805 does not support vFile:open. */
11806 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11808 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11810 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11812 int fd
, remote_errno
;
11814 /* Try opening a file to probe support. The supplied
11815 filename is irrelevant, we only care about whether
11816 the stub recognizes the packet or not. */
11817 fd
= remote_hostio_open (self
, NULL
, "just probing",
11818 FILEIO_O_RDONLY
, 0700, 0,
11822 remote_hostio_close (self
, fd
, &remote_errno
);
11824 ps
= packet_support (PACKET_vFile_open
);
11827 if (ps
== PACKET_DISABLE
)
11829 static int warning_issued
= 0;
11831 if (!warning_issued
)
11833 warning (_("remote target does not support file"
11834 " transfer, attempting to access files"
11835 " from local filesystem."));
11836 warning_issued
= 1;
11847 remote_fileio_errno_to_host (int errnum
)
11853 case FILEIO_ENOENT
:
11861 case FILEIO_EACCES
:
11863 case FILEIO_EFAULT
:
11867 case FILEIO_EEXIST
:
11869 case FILEIO_ENODEV
:
11871 case FILEIO_ENOTDIR
:
11873 case FILEIO_EISDIR
:
11875 case FILEIO_EINVAL
:
11877 case FILEIO_ENFILE
:
11879 case FILEIO_EMFILE
:
11883 case FILEIO_ENOSPC
:
11885 case FILEIO_ESPIPE
:
11889 case FILEIO_ENOSYS
:
11891 case FILEIO_ENAMETOOLONG
:
11892 return ENAMETOOLONG
;
11898 remote_hostio_error (int errnum
)
11900 int host_error
= remote_fileio_errno_to_host (errnum
);
11902 if (host_error
== -1)
11903 error (_("Unknown remote I/O error %d"), errnum
);
11905 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11909 remote_hostio_close_cleanup (void *opaque
)
11911 int fd
= *(int *) opaque
;
11914 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
11918 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
11920 struct cleanup
*back_to
, *close_cleanup
;
11921 int retcode
, fd
, remote_errno
, bytes
, io_size
;
11923 int bytes_in_buffer
;
11926 struct remote_state
*rs
= get_remote_state ();
11928 if (!rs
->remote_desc
)
11929 error (_("command can only be used with remote target"));
11931 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
11933 perror_with_name (local_file
);
11935 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11936 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
11938 0700, 0, &remote_errno
);
11940 remote_hostio_error (remote_errno
);
11942 /* Send up to this many bytes at once. They won't all fit in the
11943 remote packet limit, so we'll transfer slightly fewer. */
11944 io_size
= get_remote_packet_size ();
11945 buffer
= (gdb_byte
*) xmalloc (io_size
);
11946 back_to
= make_cleanup (xfree
, buffer
);
11948 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11950 bytes_in_buffer
= 0;
11953 while (bytes_in_buffer
|| !saw_eof
)
11957 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
11958 io_size
- bytes_in_buffer
,
11962 if (ferror (file
.get ()))
11963 error (_("Error reading %s."), local_file
);
11966 /* EOF. Unless there is something still in the
11967 buffer from the last iteration, we are done. */
11969 if (bytes_in_buffer
== 0)
11977 bytes
+= bytes_in_buffer
;
11978 bytes_in_buffer
= 0;
11980 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
11982 offset
, &remote_errno
);
11985 remote_hostio_error (remote_errno
);
11986 else if (retcode
== 0)
11987 error (_("Remote write of %d bytes returned 0!"), bytes
);
11988 else if (retcode
< bytes
)
11990 /* Short write. Save the rest of the read data for the next
11992 bytes_in_buffer
= bytes
- retcode
;
11993 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
11999 discard_cleanups (close_cleanup
);
12000 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12001 remote_hostio_error (remote_errno
);
12004 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12005 do_cleanups (back_to
);
12009 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12011 struct cleanup
*back_to
, *close_cleanup
;
12012 int fd
, remote_errno
, bytes
, io_size
;
12015 struct remote_state
*rs
= get_remote_state ();
12017 if (!rs
->remote_desc
)
12018 error (_("command can only be used with remote target"));
12020 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12021 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12024 remote_hostio_error (remote_errno
);
12026 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12028 perror_with_name (local_file
);
12030 /* Send up to this many bytes at once. They won't all fit in the
12031 remote packet limit, so we'll transfer slightly fewer. */
12032 io_size
= get_remote_packet_size ();
12033 buffer
= (gdb_byte
*) xmalloc (io_size
);
12034 back_to
= make_cleanup (xfree
, buffer
);
12036 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12041 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
12042 fd
, buffer
, io_size
, offset
, &remote_errno
);
12044 /* Success, but no bytes, means end-of-file. */
12047 remote_hostio_error (remote_errno
);
12051 bytes
= fwrite (buffer
, 1, bytes
, file
.get ());
12053 perror_with_name (local_file
);
12056 discard_cleanups (close_cleanup
);
12057 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12058 remote_hostio_error (remote_errno
);
12061 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12062 do_cleanups (back_to
);
12066 remote_file_delete (const char *remote_file
, int from_tty
)
12068 int retcode
, remote_errno
;
12069 struct remote_state
*rs
= get_remote_state ();
12071 if (!rs
->remote_desc
)
12072 error (_("command can only be used with remote target"));
12074 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
12075 NULL
, remote_file
, &remote_errno
);
12077 remote_hostio_error (remote_errno
);
12080 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12084 remote_put_command (const char *args
, int from_tty
)
12087 error_no_arg (_("file to put"));
12089 gdb_argv
argv (args
);
12090 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12091 error (_("Invalid parameters to remote put"));
12093 remote_file_put (argv
[0], argv
[1], from_tty
);
12097 remote_get_command (const char *args
, int from_tty
)
12100 error_no_arg (_("file to get"));
12102 gdb_argv
argv (args
);
12103 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12104 error (_("Invalid parameters to remote get"));
12106 remote_file_get (argv
[0], argv
[1], from_tty
);
12110 remote_delete_command (const char *args
, int from_tty
)
12113 error_no_arg (_("file to delete"));
12115 gdb_argv
argv (args
);
12116 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12117 error (_("Invalid parameters to remote delete"));
12119 remote_file_delete (argv
[0], from_tty
);
12123 remote_command (const char *args
, int from_tty
)
12125 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12129 remote_can_execute_reverse (struct target_ops
*self
)
12131 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12132 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12139 remote_supports_non_stop (struct target_ops
*self
)
12145 remote_supports_disable_randomization (struct target_ops
*self
)
12147 /* Only supported in extended mode. */
12152 remote_supports_multi_process (struct target_ops
*self
)
12154 struct remote_state
*rs
= get_remote_state ();
12156 return remote_multi_process_p (rs
);
12160 remote_supports_cond_tracepoints (void)
12162 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12166 remote_supports_cond_breakpoints (struct target_ops
*self
)
12168 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12172 remote_supports_fast_tracepoints (void)
12174 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12178 remote_supports_static_tracepoints (void)
12180 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12184 remote_supports_install_in_trace (void)
12186 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12190 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
12192 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12197 remote_supports_string_tracing (struct target_ops
*self
)
12199 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12203 remote_can_run_breakpoint_commands (struct target_ops
*self
)
12205 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12209 remote_trace_init (struct target_ops
*self
)
12211 struct remote_state
*rs
= get_remote_state ();
12214 remote_get_noisy_reply ();
12215 if (strcmp (rs
->buf
, "OK") != 0)
12216 error (_("Target does not support this command."));
12219 /* Recursive routine to walk through command list including loops, and
12220 download packets for each command. */
12223 remote_download_command_source (int num
, ULONGEST addr
,
12224 struct command_line
*cmds
)
12226 struct remote_state
*rs
= get_remote_state ();
12227 struct command_line
*cmd
;
12229 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12231 QUIT
; /* Allow user to bail out with ^C. */
12232 strcpy (rs
->buf
, "QTDPsrc:");
12233 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12234 rs
->buf
+ strlen (rs
->buf
),
12235 rs
->buf_size
- strlen (rs
->buf
));
12237 remote_get_noisy_reply ();
12238 if (strcmp (rs
->buf
, "OK"))
12239 warning (_("Target does not support source download."));
12241 if (cmd
->control_type
== while_control
12242 || cmd
->control_type
== while_stepping_control
)
12244 remote_download_command_source (num
, addr
, *cmd
->body_list
);
12246 QUIT
; /* Allow user to bail out with ^C. */
12247 strcpy (rs
->buf
, "QTDPsrc:");
12248 encode_source_string (num
, addr
, "cmd", "end",
12249 rs
->buf
+ strlen (rs
->buf
),
12250 rs
->buf_size
- strlen (rs
->buf
));
12252 remote_get_noisy_reply ();
12253 if (strcmp (rs
->buf
, "OK"))
12254 warning (_("Target does not support source download."));
12260 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
12262 #define BUF_SIZE 2048
12266 char buf
[BUF_SIZE
];
12267 std::vector
<std::string
> tdp_actions
;
12268 std::vector
<std::string
> stepping_actions
;
12270 struct breakpoint
*b
= loc
->owner
;
12271 struct tracepoint
*t
= (struct tracepoint
*) b
;
12272 struct remote_state
*rs
= get_remote_state ();
12274 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12276 tpaddr
= loc
->address
;
12277 sprintf_vma (addrbuf
, tpaddr
);
12278 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
12279 addrbuf
, /* address */
12280 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12281 t
->step_count
, t
->pass_count
);
12282 /* Fast tracepoints are mostly handled by the target, but we can
12283 tell the target how big of an instruction block should be moved
12285 if (b
->type
== bp_fast_tracepoint
)
12287 /* Only test for support at download time; we may not know
12288 target capabilities at definition time. */
12289 if (remote_supports_fast_tracepoints ())
12291 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12293 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
12294 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12296 /* If it passed validation at definition but fails now,
12297 something is very wrong. */
12298 internal_error (__FILE__
, __LINE__
,
12299 _("Fast tracepoint not "
12300 "valid during download"));
12303 /* Fast tracepoints are functionally identical to regular
12304 tracepoints, so don't take lack of support as a reason to
12305 give up on the trace run. */
12306 warning (_("Target does not support fast tracepoints, "
12307 "downloading %d as regular tracepoint"), b
->number
);
12309 else if (b
->type
== bp_static_tracepoint
)
12311 /* Only test for support at download time; we may not know
12312 target capabilities at definition time. */
12313 if (remote_supports_static_tracepoints ())
12315 struct static_tracepoint_marker marker
;
12317 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12318 strcat (buf
, ":S");
12320 error (_("Static tracepoint not valid during download"));
12323 /* Fast tracepoints are functionally identical to regular
12324 tracepoints, so don't take lack of support as a reason
12325 to give up on the trace run. */
12326 error (_("Target does not support static tracepoints"));
12328 /* If the tracepoint has a conditional, make it into an agent
12329 expression and append to the definition. */
12332 /* Only test support at download time, we may not know target
12333 capabilities at definition time. */
12334 if (remote_supports_cond_tracepoints ())
12336 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
.get ());
12337 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
12339 pkt
= buf
+ strlen (buf
);
12340 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12341 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12345 warning (_("Target does not support conditional tracepoints, "
12346 "ignoring tp %d cond"), b
->number
);
12349 if (b
->commands
|| *default_collect
)
12352 remote_get_noisy_reply ();
12353 if (strcmp (rs
->buf
, "OK"))
12354 error (_("Target does not support tracepoints."));
12356 /* do_single_steps (t); */
12357 for (auto action_it
= tdp_actions
.begin ();
12358 action_it
!= tdp_actions
.end (); action_it
++)
12360 QUIT
; /* Allow user to bail out with ^C. */
12362 bool has_more
= (action_it
!= tdp_actions
.end ()
12363 || !stepping_actions
.empty ());
12365 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
12366 b
->number
, addrbuf
, /* address */
12367 action_it
->c_str (),
12368 has_more
? '-' : 0);
12370 remote_get_noisy_reply ();
12371 if (strcmp (rs
->buf
, "OK"))
12372 error (_("Error on target while setting tracepoints."));
12375 for (auto action_it
= stepping_actions
.begin ();
12376 action_it
!= stepping_actions
.end (); action_it
++)
12378 QUIT
; /* Allow user to bail out with ^C. */
12380 bool is_first
= action_it
== stepping_actions
.begin ();
12381 bool has_more
= action_it
!= stepping_actions
.end ();
12383 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12384 b
->number
, addrbuf
, /* address */
12385 is_first
? "S" : "",
12386 action_it
->c_str (),
12387 has_more
? "-" : "");
12389 remote_get_noisy_reply ();
12390 if (strcmp (rs
->buf
, "OK"))
12391 error (_("Error on target while setting tracepoints."));
12394 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12396 if (b
->location
!= NULL
)
12398 strcpy (buf
, "QTDPsrc:");
12399 encode_source_string (b
->number
, loc
->address
, "at",
12400 event_location_to_string (b
->location
.get ()),
12401 buf
+ strlen (buf
), 2048 - strlen (buf
));
12403 remote_get_noisy_reply ();
12404 if (strcmp (rs
->buf
, "OK"))
12405 warning (_("Target does not support source download."));
12407 if (b
->cond_string
)
12409 strcpy (buf
, "QTDPsrc:");
12410 encode_source_string (b
->number
, loc
->address
,
12411 "cond", b
->cond_string
, buf
+ strlen (buf
),
12412 2048 - strlen (buf
));
12414 remote_get_noisy_reply ();
12415 if (strcmp (rs
->buf
, "OK"))
12416 warning (_("Target does not support source download."));
12418 remote_download_command_source (b
->number
, loc
->address
,
12419 breakpoint_commands (b
));
12424 remote_can_download_tracepoint (struct target_ops
*self
)
12426 struct remote_state
*rs
= get_remote_state ();
12427 struct trace_status
*ts
;
12430 /* Don't try to install tracepoints until we've relocated our
12431 symbols, and fetched and merged the target's tracepoint list with
12433 if (rs
->starting_up
)
12436 ts
= current_trace_status ();
12437 status
= remote_get_trace_status (self
, ts
);
12439 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12442 /* If we are in a tracing experiment, but remote stub doesn't support
12443 installing tracepoint in trace, we have to return. */
12444 if (!remote_supports_install_in_trace ())
12452 remote_download_trace_state_variable (struct target_ops
*self
,
12453 const trace_state_variable
&tsv
)
12455 struct remote_state
*rs
= get_remote_state ();
12458 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12459 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
12461 p
= rs
->buf
+ strlen (rs
->buf
);
12462 if ((p
- rs
->buf
) + tsv
.name
.length () * 2 >= get_remote_packet_size ())
12463 error (_("Trace state variable name too long for tsv definition packet"));
12464 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
12467 remote_get_noisy_reply ();
12468 if (*rs
->buf
== '\0')
12469 error (_("Target does not support this command."));
12470 if (strcmp (rs
->buf
, "OK") != 0)
12471 error (_("Error on target while downloading trace state variable."));
12475 remote_enable_tracepoint (struct target_ops
*self
,
12476 struct bp_location
*location
)
12478 struct remote_state
*rs
= get_remote_state ();
12481 sprintf_vma (addr_buf
, location
->address
);
12482 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12483 location
->owner
->number
, addr_buf
);
12485 remote_get_noisy_reply ();
12486 if (*rs
->buf
== '\0')
12487 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12488 if (strcmp (rs
->buf
, "OK") != 0)
12489 error (_("Error on target while enabling tracepoint."));
12493 remote_disable_tracepoint (struct target_ops
*self
,
12494 struct bp_location
*location
)
12496 struct remote_state
*rs
= get_remote_state ();
12499 sprintf_vma (addr_buf
, location
->address
);
12500 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12501 location
->owner
->number
, addr_buf
);
12503 remote_get_noisy_reply ();
12504 if (*rs
->buf
== '\0')
12505 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12506 if (strcmp (rs
->buf
, "OK") != 0)
12507 error (_("Error on target while disabling tracepoint."));
12511 remote_trace_set_readonly_regions (struct target_ops
*self
)
12515 bfd_size_type size
;
12521 return; /* No information to give. */
12523 struct remote_state
*rs
= get_remote_state ();
12525 strcpy (rs
->buf
, "QTro");
12526 offset
= strlen (rs
->buf
);
12527 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12529 char tmp1
[40], tmp2
[40];
12532 if ((s
->flags
& SEC_LOAD
) == 0 ||
12533 /* (s->flags & SEC_CODE) == 0 || */
12534 (s
->flags
& SEC_READONLY
) == 0)
12538 vma
= bfd_get_section_vma (abfd
, s
);
12539 size
= bfd_get_section_size (s
);
12540 sprintf_vma (tmp1
, vma
);
12541 sprintf_vma (tmp2
, vma
+ size
);
12542 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12543 if (offset
+ sec_length
+ 1 > rs
->buf_size
)
12545 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12547 Too many sections for read-only sections definition packet."));
12550 xsnprintf (rs
->buf
+ offset
, rs
->buf_size
- offset
, ":%s,%s",
12552 offset
+= sec_length
;
12557 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12562 remote_trace_start (struct target_ops
*self
)
12564 struct remote_state
*rs
= get_remote_state ();
12566 putpkt ("QTStart");
12567 remote_get_noisy_reply ();
12568 if (*rs
->buf
== '\0')
12569 error (_("Target does not support this command."));
12570 if (strcmp (rs
->buf
, "OK") != 0)
12571 error (_("Bogus reply from target: %s"), rs
->buf
);
12575 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12577 /* Initialize it just to avoid a GCC false warning. */
12579 /* FIXME we need to get register block size some other way. */
12580 extern int trace_regblock_size
;
12581 enum packet_result result
;
12582 struct remote_state
*rs
= get_remote_state ();
12584 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12587 trace_regblock_size
12588 = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
12590 putpkt ("qTStatus");
12594 p
= remote_get_noisy_reply ();
12596 CATCH (ex
, RETURN_MASK_ERROR
)
12598 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12600 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12603 throw_exception (ex
);
12607 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12609 /* If the remote target doesn't do tracing, flag it. */
12610 if (result
== PACKET_UNKNOWN
)
12613 /* We're working with a live target. */
12614 ts
->filename
= NULL
;
12617 error (_("Bogus trace status reply from target: %s"), rs
->buf
);
12619 /* Function 'parse_trace_status' sets default value of each field of
12620 'ts' at first, so we don't have to do it here. */
12621 parse_trace_status (p
, ts
);
12623 return ts
->running
;
12627 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12628 struct uploaded_tp
*utp
)
12630 struct remote_state
*rs
= get_remote_state ();
12632 struct bp_location
*loc
;
12633 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12634 size_t size
= get_remote_packet_size ();
12639 tp
->traceframe_usage
= 0;
12640 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
12642 /* If the tracepoint was never downloaded, don't go asking for
12644 if (tp
->number_on_target
== 0)
12646 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12647 phex_nz (loc
->address
, 0));
12649 reply
= remote_get_noisy_reply ();
12650 if (reply
&& *reply
)
12653 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12659 utp
->hit_count
= 0;
12660 utp
->traceframe_usage
= 0;
12661 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12662 phex_nz (utp
->addr
, 0));
12664 reply
= remote_get_noisy_reply ();
12665 if (reply
&& *reply
)
12668 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12674 remote_trace_stop (struct target_ops
*self
)
12676 struct remote_state
*rs
= get_remote_state ();
12679 remote_get_noisy_reply ();
12680 if (*rs
->buf
== '\0')
12681 error (_("Target does not support this command."));
12682 if (strcmp (rs
->buf
, "OK") != 0)
12683 error (_("Bogus reply from target: %s"), rs
->buf
);
12687 remote_trace_find (struct target_ops
*self
,
12688 enum trace_find_type type
, int num
,
12689 CORE_ADDR addr1
, CORE_ADDR addr2
,
12692 struct remote_state
*rs
= get_remote_state ();
12693 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12695 int target_frameno
= -1, target_tracept
= -1;
12697 /* Lookups other than by absolute frame number depend on the current
12698 trace selected, so make sure it is correct on the remote end
12700 if (type
!= tfind_number
)
12701 set_remote_traceframe ();
12704 strcpy (p
, "QTFrame:");
12705 p
= strchr (p
, '\0');
12709 xsnprintf (p
, endbuf
- p
, "%x", num
);
12712 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12715 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12718 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12719 phex_nz (addr2
, 0));
12721 case tfind_outside
:
12722 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12723 phex_nz (addr2
, 0));
12726 error (_("Unknown trace find type %d"), type
);
12730 reply
= remote_get_noisy_reply ();
12731 if (*reply
== '\0')
12732 error (_("Target does not support this command."));
12734 while (reply
&& *reply
)
12739 target_frameno
= (int) strtol (p
, &reply
, 16);
12741 error (_("Unable to parse trace frame number"));
12742 /* Don't update our remote traceframe number cache on failure
12743 to select a remote traceframe. */
12744 if (target_frameno
== -1)
12749 target_tracept
= (int) strtol (p
, &reply
, 16);
12751 error (_("Unable to parse tracepoint number"));
12753 case 'O': /* "OK"? */
12754 if (reply
[1] == 'K' && reply
[2] == '\0')
12757 error (_("Bogus reply from target: %s"), reply
);
12760 error (_("Bogus reply from target: %s"), reply
);
12763 *tpp
= target_tracept
;
12765 rs
->remote_traceframe_number
= target_frameno
;
12766 return target_frameno
;
12770 remote_get_trace_state_variable_value (struct target_ops
*self
,
12771 int tsvnum
, LONGEST
*val
)
12773 struct remote_state
*rs
= get_remote_state ();
12777 set_remote_traceframe ();
12779 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12781 reply
= remote_get_noisy_reply ();
12782 if (reply
&& *reply
)
12786 unpack_varlen_hex (reply
+ 1, &uval
);
12787 *val
= (LONGEST
) uval
;
12795 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12797 struct remote_state
*rs
= get_remote_state ();
12801 strcpy (p
, "QTSave:");
12803 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12804 error (_("Remote file name too long for trace save packet"));
12805 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12808 reply
= remote_get_noisy_reply ();
12809 if (*reply
== '\0')
12810 error (_("Target does not support this command."));
12811 if (strcmp (reply
, "OK") != 0)
12812 error (_("Bogus reply from target: %s"), reply
);
12816 /* This is basically a memory transfer, but needs to be its own packet
12817 because we don't know how the target actually organizes its trace
12818 memory, plus we want to be able to ask for as much as possible, but
12819 not be unhappy if we don't get as much as we ask for. */
12822 remote_get_raw_trace_data (struct target_ops
*self
,
12823 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12825 struct remote_state
*rs
= get_remote_state ();
12831 strcpy (p
, "qTBuffer:");
12833 p
+= hexnumstr (p
, offset
);
12835 p
+= hexnumstr (p
, len
);
12839 reply
= remote_get_noisy_reply ();
12840 if (reply
&& *reply
)
12842 /* 'l' by itself means we're at the end of the buffer and
12843 there is nothing more to get. */
12847 /* Convert the reply into binary. Limit the number of bytes to
12848 convert according to our passed-in buffer size, rather than
12849 what was returned in the packet; if the target is
12850 unexpectedly generous and gives us a bigger reply than we
12851 asked for, we don't want to crash. */
12852 rslt
= hex2bin (reply
, buf
, len
);
12856 /* Something went wrong, flag as an error. */
12861 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12863 struct remote_state
*rs
= get_remote_state ();
12865 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12869 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12871 reply
= remote_get_noisy_reply ();
12872 if (*reply
== '\0')
12873 error (_("Target does not support this command."));
12874 if (strcmp (reply
, "OK") != 0)
12875 error (_("Bogus reply from target: %s"), reply
);
12878 warning (_("Target does not support disconnected tracing."));
12882 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12884 struct thread_info
*info
= find_thread_ptid (ptid
);
12886 if (info
!= NULL
&& info
->priv
!= NULL
)
12887 return get_remote_thread_info (info
)->core
;
12893 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12895 struct remote_state
*rs
= get_remote_state ();
12898 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12900 reply
= remote_get_noisy_reply ();
12901 if (*reply
== '\0')
12902 error (_("Target does not support this command."));
12903 if (strcmp (reply
, "OK") != 0)
12904 error (_("Bogus reply from target: %s"), reply
);
12907 static traceframe_info_up
12908 remote_traceframe_info (struct target_ops
*self
)
12910 gdb::optional
<gdb::char_vector
> text
12911 = target_read_stralloc (¤t_target
, TARGET_OBJECT_TRACEFRAME_INFO
,
12914 return parse_traceframe_info (text
->data ());
12919 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12920 instruction on which a fast tracepoint may be placed. Returns -1
12921 if the packet is not supported, and 0 if the minimum instruction
12922 length is unknown. */
12925 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
12927 struct remote_state
*rs
= get_remote_state ();
12930 /* If we're not debugging a process yet, the IPA can't be
12932 if (!target_has_execution
)
12935 /* Make sure the remote is pointing at the right process. */
12936 set_general_process ();
12938 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
12940 reply
= remote_get_noisy_reply ();
12941 if (*reply
== '\0')
12945 ULONGEST min_insn_len
;
12947 unpack_varlen_hex (reply
, &min_insn_len
);
12949 return (int) min_insn_len
;
12954 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
12956 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
12958 struct remote_state
*rs
= get_remote_state ();
12959 char *buf
= rs
->buf
;
12960 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12961 enum packet_result result
;
12963 gdb_assert (val
>= 0 || val
== -1);
12964 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
12965 /* Send -1 as literal "-1" to avoid host size dependency. */
12969 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
12972 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
12975 remote_get_noisy_reply ();
12976 result
= packet_ok (rs
->buf
,
12977 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
12979 if (result
!= PACKET_OK
)
12980 warning (_("Bogus reply from target: %s"), rs
->buf
);
12985 remote_set_trace_notes (struct target_ops
*self
,
12986 const char *user
, const char *notes
,
12987 const char *stop_notes
)
12989 struct remote_state
*rs
= get_remote_state ();
12991 char *buf
= rs
->buf
;
12992 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12995 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
12998 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
12999 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13005 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13006 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13012 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13013 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13017 /* Ensure the buffer is terminated. */
13021 reply
= remote_get_noisy_reply ();
13022 if (*reply
== '\0')
13025 if (strcmp (reply
, "OK") != 0)
13026 error (_("Bogus reply from target: %s"), reply
);
13032 remote_use_agent (struct target_ops
*self
, int use
)
13034 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13036 struct remote_state
*rs
= get_remote_state ();
13038 /* If the stub supports QAgent. */
13039 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13041 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13043 if (strcmp (rs
->buf
, "OK") == 0)
13054 remote_can_use_agent (struct target_ops
*self
)
13056 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13059 struct btrace_target_info
13061 /* The ptid of the traced thread. */
13064 /* The obtained branch trace configuration. */
13065 struct btrace_config conf
;
13068 /* Reset our idea of our target's btrace configuration. */
13071 remote_btrace_reset (void)
13073 struct remote_state
*rs
= get_remote_state ();
13075 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13078 /* Synchronize the configuration with the target. */
13081 btrace_sync_conf (const struct btrace_config
*conf
)
13083 struct packet_config
*packet
;
13084 struct remote_state
*rs
;
13085 char *buf
, *pos
, *endbuf
;
13087 rs
= get_remote_state ();
13089 endbuf
= buf
+ get_remote_packet_size ();
13091 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13092 if (packet_config_support (packet
) == PACKET_ENABLE
13093 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13096 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13100 getpkt (&buf
, &rs
->buf_size
, 0);
13102 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13104 if (buf
[0] == 'E' && buf
[1] == '.')
13105 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13107 error (_("Failed to configure the BTS buffer size."));
13110 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13113 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13114 if (packet_config_support (packet
) == PACKET_ENABLE
13115 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13118 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13122 getpkt (&buf
, &rs
->buf_size
, 0);
13124 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13126 if (buf
[0] == 'E' && buf
[1] == '.')
13127 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13129 error (_("Failed to configure the trace buffer size."));
13132 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13136 /* Read the current thread's btrace configuration from the target and
13137 store it into CONF. */
13140 btrace_read_config (struct btrace_config
*conf
)
13142 gdb::optional
<gdb::char_vector
> xml
13143 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE_CONF
, "");
13145 parse_xml_btrace_conf (conf
, xml
->data ());
13148 /* Maybe reopen target btrace. */
13151 remote_btrace_maybe_reopen (void)
13153 struct remote_state
*rs
= get_remote_state ();
13154 struct thread_info
*tp
;
13155 int btrace_target_pushed
= 0;
13158 scoped_restore_current_thread restore_thread
;
13160 ALL_NON_EXITED_THREADS (tp
)
13162 set_general_thread (tp
->ptid
);
13164 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13165 btrace_read_config (&rs
->btrace_config
);
13167 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13170 #if !defined (HAVE_LIBIPT)
13171 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13176 warning (_("Target is recording using Intel Processor Trace "
13177 "but support was disabled at compile time."));
13182 #endif /* !defined (HAVE_LIBIPT) */
13184 /* Push target, once, but before anything else happens. This way our
13185 changes to the threads will be cleaned up by unpushing the target
13186 in case btrace_read_config () throws. */
13187 if (!btrace_target_pushed
)
13189 btrace_target_pushed
= 1;
13190 record_btrace_push_target ();
13191 printf_filtered (_("Target is recording using %s.\n"),
13192 btrace_format_string (rs
->btrace_config
.format
));
13195 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13196 tp
->btrace
.target
->ptid
= tp
->ptid
;
13197 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13201 /* Enable branch tracing. */
13203 static struct btrace_target_info
*
13204 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
13205 const struct btrace_config
*conf
)
13207 struct btrace_target_info
*tinfo
= NULL
;
13208 struct packet_config
*packet
= NULL
;
13209 struct remote_state
*rs
= get_remote_state ();
13210 char *buf
= rs
->buf
;
13211 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13213 switch (conf
->format
)
13215 case BTRACE_FORMAT_BTS
:
13216 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13219 case BTRACE_FORMAT_PT
:
13220 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13224 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13225 error (_("Target does not support branch tracing."));
13227 btrace_sync_conf (conf
);
13229 set_general_thread (ptid
);
13231 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13233 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13235 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13237 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13238 error (_("Could not enable branch tracing for %s: %s"),
13239 target_pid_to_str (ptid
), rs
->buf
+ 2);
13241 error (_("Could not enable branch tracing for %s."),
13242 target_pid_to_str (ptid
));
13245 tinfo
= XCNEW (struct btrace_target_info
);
13246 tinfo
->ptid
= ptid
;
13248 /* If we fail to read the configuration, we lose some information, but the
13249 tracing itself is not impacted. */
13252 btrace_read_config (&tinfo
->conf
);
13254 CATCH (err
, RETURN_MASK_ERROR
)
13256 if (err
.message
!= NULL
)
13257 warning ("%s", err
.message
);
13264 /* Disable branch tracing. */
13267 remote_disable_btrace (struct target_ops
*self
,
13268 struct btrace_target_info
*tinfo
)
13270 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13271 struct remote_state
*rs
= get_remote_state ();
13272 char *buf
= rs
->buf
;
13273 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13275 if (packet_config_support (packet
) != PACKET_ENABLE
)
13276 error (_("Target does not support branch tracing."));
13278 set_general_thread (tinfo
->ptid
);
13280 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13282 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13284 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13286 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13287 error (_("Could not disable branch tracing for %s: %s"),
13288 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13290 error (_("Could not disable branch tracing for %s."),
13291 target_pid_to_str (tinfo
->ptid
));
13297 /* Teardown branch tracing. */
13300 remote_teardown_btrace (struct target_ops
*self
,
13301 struct btrace_target_info
*tinfo
)
13303 /* We must not talk to the target during teardown. */
13307 /* Read the branch trace. */
13309 static enum btrace_error
13310 remote_read_btrace (struct target_ops
*self
,
13311 struct btrace_data
*btrace
,
13312 struct btrace_target_info
*tinfo
,
13313 enum btrace_read_type type
)
13315 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13318 if (packet_config_support (packet
) != PACKET_ENABLE
)
13319 error (_("Target does not support branch tracing."));
13321 #if !defined(HAVE_LIBEXPAT)
13322 error (_("Cannot process branch tracing result. XML parsing not supported."));
13327 case BTRACE_READ_ALL
:
13330 case BTRACE_READ_NEW
:
13333 case BTRACE_READ_DELTA
:
13337 internal_error (__FILE__
, __LINE__
,
13338 _("Bad branch tracing read type: %u."),
13339 (unsigned int) type
);
13342 gdb::optional
<gdb::char_vector
> xml
13343 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE
, annex
);
13345 return BTRACE_ERR_UNKNOWN
;
13347 parse_xml_btrace (btrace
, xml
->data ());
13349 return BTRACE_ERR_NONE
;
13352 static const struct btrace_config
*
13353 remote_btrace_conf (struct target_ops
*self
,
13354 const struct btrace_target_info
*tinfo
)
13356 return &tinfo
->conf
;
13360 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
13362 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13366 /* Implementation of to_load. */
13369 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
13371 generic_load (name
, from_tty
);
13374 /* Accepts an integer PID; returns a string representing a file that
13375 can be opened on the remote side to get the symbols for the child
13376 process. Returns NULL if the operation is not supported. */
13379 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13381 static gdb::optional
<gdb::char_vector
> filename
;
13382 struct inferior
*inf
;
13383 char *annex
= NULL
;
13385 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13388 inf
= find_inferior_pid (pid
);
13390 internal_error (__FILE__
, __LINE__
,
13391 _("not currently attached to process %d"), pid
);
13393 if (!inf
->fake_pid_p
)
13395 const int annex_size
= 9;
13397 annex
= (char *) alloca (annex_size
);
13398 xsnprintf (annex
, annex_size
, "%x", pid
);
13401 filename
= target_read_stralloc (¤t_target
,
13402 TARGET_OBJECT_EXEC_FILE
, annex
);
13404 return filename
? filename
->data () : nullptr;
13407 /* Implement the to_can_do_single_step target_ops method. */
13410 remote_can_do_single_step (struct target_ops
*ops
)
13412 /* We can only tell whether target supports single step or not by
13413 supported s and S vCont actions if the stub supports vContSupported
13414 feature. If the stub doesn't support vContSupported feature,
13415 we have conservatively to think target doesn't supports single
13417 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13419 struct remote_state
*rs
= get_remote_state ();
13421 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13422 remote_vcont_probe (rs
);
13424 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13430 /* Implementation of the to_execution_direction method for the remote
13433 static enum exec_direction_kind
13434 remote_execution_direction (struct target_ops
*self
)
13436 struct remote_state
*rs
= get_remote_state ();
13438 return rs
->last_resume_exec_dir
;
13441 /* Return pointer to the thread_info struct which corresponds to
13442 THREAD_HANDLE (having length HANDLE_LEN). */
13444 static struct thread_info
*
13445 remote_thread_handle_to_thread_info (struct target_ops
*ops
,
13446 const gdb_byte
*thread_handle
,
13448 struct inferior
*inf
)
13450 struct thread_info
*tp
;
13452 ALL_NON_EXITED_THREADS (tp
)
13454 remote_thread_info
*priv
= get_remote_thread_info (tp
);
13456 if (tp
->inf
== inf
&& priv
!= NULL
)
13458 if (handle_len
!= priv
->thread_handle
.size ())
13459 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13460 handle_len
, priv
->thread_handle
.size ());
13461 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
13471 init_remote_ops (void)
13473 remote_ops
.to_shortname
= "remote";
13474 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13475 remote_ops
.to_doc
=
13476 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13477 Specify the serial device it is connected to\n\
13478 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13479 remote_ops
.to_open
= remote_open
;
13480 remote_ops
.to_close
= remote_close
;
13481 remote_ops
.to_detach
= remote_detach
;
13482 remote_ops
.to_disconnect
= remote_disconnect
;
13483 remote_ops
.to_resume
= remote_resume
;
13484 remote_ops
.to_commit_resume
= remote_commit_resume
;
13485 remote_ops
.to_wait
= remote_wait
;
13486 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13487 remote_ops
.to_store_registers
= remote_store_registers
;
13488 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13489 remote_ops
.to_files_info
= remote_files_info
;
13490 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13491 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13492 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13493 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13494 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13495 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13496 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13497 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13498 remote_ops
.to_watchpoint_addr_within_range
=
13499 remote_watchpoint_addr_within_range
;
13500 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13501 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13502 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13503 remote_ops
.to_region_ok_for_hw_watchpoint
13504 = remote_region_ok_for_hw_watchpoint
;
13505 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13506 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13507 remote_ops
.to_kill
= remote_kill
;
13508 remote_ops
.to_load
= remote_load
;
13509 remote_ops
.to_mourn_inferior
= remote_mourn
;
13510 remote_ops
.to_pass_signals
= remote_pass_signals
;
13511 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13512 remote_ops
.to_program_signals
= remote_program_signals
;
13513 remote_ops
.to_thread_alive
= remote_thread_alive
;
13514 remote_ops
.to_thread_name
= remote_thread_name
;
13515 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13516 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13517 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13518 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13519 remote_ops
.to_stop
= remote_stop
;
13520 remote_ops
.to_interrupt
= remote_interrupt
;
13521 remote_ops
.to_pass_ctrlc
= remote_pass_ctrlc
;
13522 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13523 remote_ops
.to_get_memory_xfer_limit
= remote_get_memory_xfer_limit
;
13524 remote_ops
.to_rcmd
= remote_rcmd
;
13525 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13526 remote_ops
.to_log_command
= serial_log_command
;
13527 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13528 remote_ops
.to_stratum
= process_stratum
;
13529 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13530 remote_ops
.to_has_memory
= default_child_has_memory
;
13531 remote_ops
.to_has_stack
= default_child_has_stack
;
13532 remote_ops
.to_has_registers
= default_child_has_registers
;
13533 remote_ops
.to_has_execution
= default_child_has_execution
;
13534 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13535 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13536 remote_ops
.to_magic
= OPS_MAGIC
;
13537 remote_ops
.to_memory_map
= remote_memory_map
;
13538 remote_ops
.to_flash_erase
= remote_flash_erase
;
13539 remote_ops
.to_flash_done
= remote_flash_done
;
13540 remote_ops
.to_read_description
= remote_read_description
;
13541 remote_ops
.to_search_memory
= remote_search_memory
;
13542 remote_ops
.to_can_async_p
= remote_can_async_p
;
13543 remote_ops
.to_is_async_p
= remote_is_async_p
;
13544 remote_ops
.to_async
= remote_async
;
13545 remote_ops
.to_thread_events
= remote_thread_events
;
13546 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13547 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13548 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13549 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13550 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13551 remote_ops
.to_supports_disable_randomization
13552 = remote_supports_disable_randomization
;
13553 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13554 remote_ops
.to_fileio_open
= remote_hostio_open
;
13555 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13556 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13557 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13558 remote_ops
.to_fileio_close
= remote_hostio_close
;
13559 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13560 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13561 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13562 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13563 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13564 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13565 remote_ops
.to_trace_init
= remote_trace_init
;
13566 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13567 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13568 remote_ops
.to_download_trace_state_variable
13569 = remote_download_trace_state_variable
;
13570 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13571 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13572 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13573 remote_ops
.to_trace_start
= remote_trace_start
;
13574 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13575 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13576 remote_ops
.to_trace_stop
= remote_trace_stop
;
13577 remote_ops
.to_trace_find
= remote_trace_find
;
13578 remote_ops
.to_get_trace_state_variable_value
13579 = remote_get_trace_state_variable_value
;
13580 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13581 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13582 remote_ops
.to_upload_trace_state_variables
13583 = remote_upload_trace_state_variables
;
13584 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13585 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13586 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13587 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13588 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13589 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13590 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13591 remote_ops
.to_verify_memory
= remote_verify_memory
;
13592 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13593 remote_ops
.to_set_permissions
= remote_set_permissions
;
13594 remote_ops
.to_static_tracepoint_marker_at
13595 = remote_static_tracepoint_marker_at
;
13596 remote_ops
.to_static_tracepoint_markers_by_strid
13597 = remote_static_tracepoint_markers_by_strid
;
13598 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13599 remote_ops
.to_use_agent
= remote_use_agent
;
13600 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13601 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13602 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13603 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13604 remote_ops
.to_read_btrace
= remote_read_btrace
;
13605 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13606 remote_ops
.to_augmented_libraries_svr4_read
=
13607 remote_augmented_libraries_svr4_read
;
13608 remote_ops
.to_follow_fork
= remote_follow_fork
;
13609 remote_ops
.to_follow_exec
= remote_follow_exec
;
13610 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13611 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13612 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13613 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13614 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13615 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13616 remote_ops
.to_execution_direction
= remote_execution_direction
;
13617 remote_ops
.to_thread_handle_to_thread_info
=
13618 remote_thread_handle_to_thread_info
;
13621 /* Set up the extended remote vector by making a copy of the standard
13622 remote vector and adding to it. */
13625 init_extended_remote_ops (void)
13627 extended_remote_ops
= remote_ops
;
13629 extended_remote_ops
.to_shortname
= "extended-remote";
13630 extended_remote_ops
.to_longname
=
13631 "Extended remote serial target in gdb-specific protocol";
13632 extended_remote_ops
.to_doc
=
13633 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13634 Specify the serial device it is connected to (e.g. /dev/ttya).";
13635 extended_remote_ops
.to_open
= extended_remote_open
;
13636 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13637 extended_remote_ops
.to_detach
= extended_remote_detach
;
13638 extended_remote_ops
.to_attach
= extended_remote_attach
;
13639 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13640 extended_remote_ops
.to_supports_disable_randomization
13641 = extended_remote_supports_disable_randomization
;
13645 remote_can_async_p (struct target_ops
*ops
)
13647 struct remote_state
*rs
= get_remote_state ();
13649 /* We don't go async if the user has explicitly prevented it with the
13650 "maint set target-async" command. */
13651 if (!target_async_permitted
)
13654 /* We're async whenever the serial device is. */
13655 return serial_can_async_p (rs
->remote_desc
);
13659 remote_is_async_p (struct target_ops
*ops
)
13661 struct remote_state
*rs
= get_remote_state ();
13663 if (!target_async_permitted
)
13664 /* We only enable async when the user specifically asks for it. */
13667 /* We're async whenever the serial device is. */
13668 return serial_is_async_p (rs
->remote_desc
);
13671 /* Pass the SERIAL event on and up to the client. One day this code
13672 will be able to delay notifying the client of an event until the
13673 point where an entire packet has been received. */
13675 static serial_event_ftype remote_async_serial_handler
;
13678 remote_async_serial_handler (struct serial
*scb
, void *context
)
13680 /* Don't propogate error information up to the client. Instead let
13681 the client find out about the error by querying the target. */
13682 inferior_event_handler (INF_REG_EVENT
, NULL
);
13686 remote_async_inferior_event_handler (gdb_client_data data
)
13688 inferior_event_handler (INF_REG_EVENT
, NULL
);
13692 remote_async (struct target_ops
*ops
, int enable
)
13694 struct remote_state
*rs
= get_remote_state ();
13698 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13700 /* If there are pending events in the stop reply queue tell the
13701 event loop to process them. */
13702 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13703 mark_async_event_handler (remote_async_inferior_event_token
);
13704 /* For simplicity, below we clear the pending events token
13705 without remembering whether it is marked, so here we always
13706 mark it. If there's actually no pending notification to
13707 process, this ends up being a no-op (other than a spurious
13708 event-loop wakeup). */
13709 if (target_is_non_stop_p ())
13710 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13714 serial_async (rs
->remote_desc
, NULL
, NULL
);
13715 /* If the core is disabling async, it doesn't want to be
13716 disturbed with target events. Clear all async event sources
13718 clear_async_event_handler (remote_async_inferior_event_token
);
13719 if (target_is_non_stop_p ())
13720 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13724 /* Implementation of the to_thread_events method. */
13727 remote_thread_events (struct target_ops
*ops
, int enable
)
13729 struct remote_state
*rs
= get_remote_state ();
13730 size_t size
= get_remote_packet_size ();
13732 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13735 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13737 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13739 switch (packet_ok (rs
->buf
,
13740 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13743 if (strcmp (rs
->buf
, "OK") != 0)
13744 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13747 warning (_("Remote failure reply: %s"), rs
->buf
);
13749 case PACKET_UNKNOWN
:
13755 set_remote_cmd (const char *args
, int from_tty
)
13757 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13761 show_remote_cmd (const char *args
, int from_tty
)
13763 /* We can't just use cmd_show_list here, because we want to skip
13764 the redundant "show remote Z-packet" and the legacy aliases. */
13765 struct cmd_list_element
*list
= remote_show_cmdlist
;
13766 struct ui_out
*uiout
= current_uiout
;
13768 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
13769 for (; list
!= NULL
; list
= list
->next
)
13770 if (strcmp (list
->name
, "Z-packet") == 0)
13772 else if (list
->type
== not_set_cmd
)
13773 /* Alias commands are exactly like the original, except they
13774 don't have the normal type. */
13778 ui_out_emit_tuple
option_emitter (uiout
, "option");
13780 uiout
->field_string ("name", list
->name
);
13781 uiout
->text (": ");
13782 if (list
->type
== show_cmd
)
13783 do_show_command (NULL
, from_tty
, list
);
13785 cmd_func (list
, NULL
, from_tty
);
13790 /* Function to be called whenever a new objfile (shlib) is detected. */
13792 remote_new_objfile (struct objfile
*objfile
)
13794 struct remote_state
*rs
= get_remote_state ();
13796 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13797 remote_check_symbols ();
13800 /* Pull all the tracepoints defined on the target and create local
13801 data structures representing them. We don't want to create real
13802 tracepoints yet, we don't want to mess up the user's existing
13806 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13808 struct remote_state
*rs
= get_remote_state ();
13811 /* Ask for a first packet of tracepoint definition. */
13813 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13815 while (*p
&& *p
!= 'l')
13817 parse_tracepoint_definition (p
, utpp
);
13818 /* Ask for another packet of tracepoint definition. */
13820 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13827 remote_upload_trace_state_variables (struct target_ops
*self
,
13828 struct uploaded_tsv
**utsvp
)
13830 struct remote_state
*rs
= get_remote_state ();
13833 /* Ask for a first packet of variable definition. */
13835 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13837 while (*p
&& *p
!= 'l')
13839 parse_tsv_definition (p
, utsvp
);
13840 /* Ask for another packet of variable definition. */
13842 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13848 /* The "set/show range-stepping" show hook. */
13851 show_range_stepping (struct ui_file
*file
, int from_tty
,
13852 struct cmd_list_element
*c
,
13855 fprintf_filtered (file
,
13856 _("Debugger's willingness to use range stepping "
13857 "is %s.\n"), value
);
13860 /* The "set/show range-stepping" set hook. */
13863 set_range_stepping (const char *ignore_args
, int from_tty
,
13864 struct cmd_list_element
*c
)
13866 struct remote_state
*rs
= get_remote_state ();
13868 /* Whene enabling, check whether range stepping is actually
13869 supported by the target, and warn if not. */
13870 if (use_range_stepping
)
13872 if (rs
->remote_desc
!= NULL
)
13874 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13875 remote_vcont_probe (rs
);
13877 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13878 && rs
->supports_vCont
.r
)
13882 warning (_("Range stepping is not supported by the current target"));
13887 _initialize_remote (void)
13889 struct cmd_list_element
*cmd
;
13890 const char *cmd_name
;
13892 /* architecture specific data */
13893 remote_gdbarch_data_handle
=
13894 gdbarch_data_register_post_init (init_remote_state
);
13895 remote_g_packet_data_handle
=
13896 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
13899 = register_program_space_data_with_cleanup (NULL
,
13900 remote_pspace_data_cleanup
);
13902 /* Initialize the per-target state. At the moment there is only one
13903 of these, not one per target. Only one target is active at a
13905 remote_state
= new_remote_state ();
13907 init_remote_ops ();
13908 add_target (&remote_ops
);
13910 init_extended_remote_ops ();
13911 add_target (&extended_remote_ops
);
13913 /* Hook into new objfile notification. */
13914 gdb::observers::new_objfile
.attach (remote_new_objfile
);
13915 /* We're no longer interested in notification events of an inferior
13917 gdb::observers::inferior_exit
.attach (discard_pending_stop_replies
);
13920 init_remote_threadtests ();
13923 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
13924 /* set/show remote ... */
13926 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
13927 Remote protocol specific variables\n\
13928 Configure various remote-protocol specific variables such as\n\
13929 the packets being used"),
13930 &remote_set_cmdlist
, "set remote ",
13931 0 /* allow-unknown */, &setlist
);
13932 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
13933 Remote protocol specific variables\n\
13934 Configure various remote-protocol specific variables such as\n\
13935 the packets being used"),
13936 &remote_show_cmdlist
, "show remote ",
13937 0 /* allow-unknown */, &showlist
);
13939 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
13940 Compare section data on target to the exec file.\n\
13941 Argument is a single section name (default: all loaded sections).\n\
13942 To compare only read-only loaded sections, specify the -r option."),
13945 add_cmd ("packet", class_maintenance
, packet_command
, _("\
13946 Send an arbitrary packet to a remote target.\n\
13947 maintenance packet TEXT\n\
13948 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13949 this command sends the string TEXT to the inferior, and displays the\n\
13950 response packet. GDB supplies the initial `$' character, and the\n\
13951 terminating `#' character and checksum."),
13954 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
13955 Set whether to send break if interrupted."), _("\
13956 Show whether to send break if interrupted."), _("\
13957 If set, a break, instead of a cntrl-c, is sent to the remote target."),
13958 set_remotebreak
, show_remotebreak
,
13959 &setlist
, &showlist
);
13960 cmd_name
= "remotebreak";
13961 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
13962 deprecate_cmd (cmd
, "set remote interrupt-sequence");
13963 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
13964 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
13965 deprecate_cmd (cmd
, "show remote interrupt-sequence");
13967 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
13968 interrupt_sequence_modes
, &interrupt_sequence_mode
,
13970 Set interrupt sequence to remote target."), _("\
13971 Show interrupt sequence to remote target."), _("\
13972 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
13973 NULL
, show_interrupt_sequence
,
13974 &remote_set_cmdlist
,
13975 &remote_show_cmdlist
);
13977 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
13978 &interrupt_on_connect
, _("\
13979 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13980 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13981 If set, interrupt sequence is sent to remote target."),
13983 &remote_set_cmdlist
, &remote_show_cmdlist
);
13985 /* Install commands for configuring memory read/write packets. */
13987 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
13988 Set the maximum number of bytes per memory write packet (deprecated)."),
13990 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
13991 Show the maximum number of bytes per memory write packet (deprecated)."),
13993 add_cmd ("memory-write-packet-size", no_class
,
13994 set_memory_write_packet_size
, _("\
13995 Set the maximum number of bytes per memory-write packet.\n\
13996 Specify the number of bytes in a packet or 0 (zero) for the\n\
13997 default packet size. The actual limit is further reduced\n\
13998 dependent on the target. Specify ``fixed'' to disable the\n\
13999 further restriction and ``limit'' to enable that restriction."),
14000 &remote_set_cmdlist
);
14001 add_cmd ("memory-read-packet-size", no_class
,
14002 set_memory_read_packet_size
, _("\
14003 Set the maximum number of bytes per memory-read packet.\n\
14004 Specify the number of bytes in a packet or 0 (zero) for the\n\
14005 default packet size. The actual limit is further reduced\n\
14006 dependent on the target. Specify ``fixed'' to disable the\n\
14007 further restriction and ``limit'' to enable that restriction."),
14008 &remote_set_cmdlist
);
14009 add_cmd ("memory-write-packet-size", no_class
,
14010 show_memory_write_packet_size
,
14011 _("Show the maximum number of bytes per memory-write packet."),
14012 &remote_show_cmdlist
);
14013 add_cmd ("memory-read-packet-size", no_class
,
14014 show_memory_read_packet_size
,
14015 _("Show the maximum number of bytes per memory-read packet."),
14016 &remote_show_cmdlist
);
14018 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
14019 &remote_hw_watchpoint_limit
, _("\
14020 Set the maximum number of target hardware watchpoints."), _("\
14021 Show the maximum number of target hardware watchpoints."), _("\
14022 Specify a negative limit for unlimited."),
14023 NULL
, NULL
, /* FIXME: i18n: The maximum
14024 number of target hardware
14025 watchpoints is %s. */
14026 &remote_set_cmdlist
, &remote_show_cmdlist
);
14027 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
14028 &remote_hw_watchpoint_length_limit
, _("\
14029 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14030 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14031 Specify a negative limit for unlimited."),
14032 NULL
, NULL
, /* FIXME: i18n: The maximum
14033 length (in bytes) of a target
14034 hardware watchpoint is %s. */
14035 &remote_set_cmdlist
, &remote_show_cmdlist
);
14036 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
14037 &remote_hw_breakpoint_limit
, _("\
14038 Set the maximum number of target hardware breakpoints."), _("\
14039 Show the maximum number of target hardware breakpoints."), _("\
14040 Specify a negative limit for unlimited."),
14041 NULL
, NULL
, /* FIXME: i18n: The maximum
14042 number of target hardware
14043 breakpoints is %s. */
14044 &remote_set_cmdlist
, &remote_show_cmdlist
);
14046 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14047 &remote_address_size
, _("\
14048 Set the maximum size of the address (in bits) in a memory packet."), _("\
14049 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14051 NULL
, /* FIXME: i18n: */
14052 &setlist
, &showlist
);
14054 init_all_packet_configs ();
14056 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14057 "X", "binary-download", 1);
14059 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14060 "vCont", "verbose-resume", 0);
14062 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14063 "QPassSignals", "pass-signals", 0);
14065 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14066 "QCatchSyscalls", "catch-syscalls", 0);
14068 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14069 "QProgramSignals", "program-signals", 0);
14071 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14072 "QSetWorkingDir", "set-working-dir", 0);
14074 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14075 "QStartupWithShell", "startup-with-shell", 0);
14077 add_packet_config_cmd (&remote_protocol_packets
14078 [PACKET_QEnvironmentHexEncoded
],
14079 "QEnvironmentHexEncoded", "environment-hex-encoded",
14082 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14083 "QEnvironmentReset", "environment-reset",
14086 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14087 "QEnvironmentUnset", "environment-unset",
14090 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14091 "qSymbol", "symbol-lookup", 0);
14093 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14094 "P", "set-register", 1);
14096 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14097 "p", "fetch-register", 1);
14099 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14100 "Z0", "software-breakpoint", 0);
14102 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14103 "Z1", "hardware-breakpoint", 0);
14105 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14106 "Z2", "write-watchpoint", 0);
14108 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14109 "Z3", "read-watchpoint", 0);
14111 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14112 "Z4", "access-watchpoint", 0);
14114 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14115 "qXfer:auxv:read", "read-aux-vector", 0);
14117 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14118 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14120 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14121 "qXfer:features:read", "target-features", 0);
14123 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14124 "qXfer:libraries:read", "library-info", 0);
14126 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14127 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14129 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14130 "qXfer:memory-map:read", "memory-map", 0);
14132 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14133 "qXfer:spu:read", "read-spu-object", 0);
14135 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14136 "qXfer:spu:write", "write-spu-object", 0);
14138 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14139 "qXfer:osdata:read", "osdata", 0);
14141 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14142 "qXfer:threads:read", "threads", 0);
14144 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14145 "qXfer:siginfo:read", "read-siginfo-object", 0);
14147 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14148 "qXfer:siginfo:write", "write-siginfo-object", 0);
14150 add_packet_config_cmd
14151 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14152 "qXfer:traceframe-info:read", "traceframe-info", 0);
14154 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14155 "qXfer:uib:read", "unwind-info-block", 0);
14157 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14158 "qGetTLSAddr", "get-thread-local-storage-address",
14161 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14162 "qGetTIBAddr", "get-thread-information-block-address",
14165 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14166 "bc", "reverse-continue", 0);
14168 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14169 "bs", "reverse-step", 0);
14171 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14172 "qSupported", "supported-packets", 0);
14174 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14175 "qSearch:memory", "search-memory", 0);
14177 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14178 "qTStatus", "trace-status", 0);
14180 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14181 "vFile:setfs", "hostio-setfs", 0);
14183 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14184 "vFile:open", "hostio-open", 0);
14186 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14187 "vFile:pread", "hostio-pread", 0);
14189 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14190 "vFile:pwrite", "hostio-pwrite", 0);
14192 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14193 "vFile:close", "hostio-close", 0);
14195 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14196 "vFile:unlink", "hostio-unlink", 0);
14198 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14199 "vFile:readlink", "hostio-readlink", 0);
14201 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14202 "vFile:fstat", "hostio-fstat", 0);
14204 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14205 "vAttach", "attach", 0);
14207 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14210 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14211 "QStartNoAckMode", "noack", 0);
14213 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14214 "vKill", "kill", 0);
14216 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14217 "qAttached", "query-attached", 0);
14219 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14220 "ConditionalTracepoints",
14221 "conditional-tracepoints", 0);
14223 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14224 "ConditionalBreakpoints",
14225 "conditional-breakpoints", 0);
14227 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14228 "BreakpointCommands",
14229 "breakpoint-commands", 0);
14231 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14232 "FastTracepoints", "fast-tracepoints", 0);
14234 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14235 "TracepointSource", "TracepointSource", 0);
14237 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14238 "QAllow", "allow", 0);
14240 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14241 "StaticTracepoints", "static-tracepoints", 0);
14243 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14244 "InstallInTrace", "install-in-trace", 0);
14246 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14247 "qXfer:statictrace:read", "read-sdata-object", 0);
14249 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14250 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14252 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14253 "QDisableRandomization", "disable-randomization", 0);
14255 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14256 "QAgent", "agent", 0);
14258 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14259 "QTBuffer:size", "trace-buffer-size", 0);
14261 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14262 "Qbtrace:off", "disable-btrace", 0);
14264 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14265 "Qbtrace:bts", "enable-btrace-bts", 0);
14267 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14268 "Qbtrace:pt", "enable-btrace-pt", 0);
14270 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14271 "qXfer:btrace", "read-btrace", 0);
14273 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14274 "qXfer:btrace-conf", "read-btrace-conf", 0);
14276 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14277 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14279 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14280 "multiprocess-feature", "multiprocess-feature", 0);
14282 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14283 "swbreak-feature", "swbreak-feature", 0);
14285 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14286 "hwbreak-feature", "hwbreak-feature", 0);
14288 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14289 "fork-event-feature", "fork-event-feature", 0);
14291 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14292 "vfork-event-feature", "vfork-event-feature", 0);
14294 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14295 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14297 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14298 "vContSupported", "verbose-resume-supported", 0);
14300 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14301 "exec-event-feature", "exec-event-feature", 0);
14303 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14304 "vCtrlC", "ctrl-c", 0);
14306 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14307 "QThreadEvents", "thread-events", 0);
14309 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14310 "N stop reply", "no-resumed-stop-reply", 0);
14312 /* Assert that we've registered "set remote foo-packet" commands
14313 for all packet configs. */
14317 for (i
= 0; i
< PACKET_MAX
; i
++)
14319 /* Ideally all configs would have a command associated. Some
14320 still don't though. */
14325 case PACKET_QNonStop
:
14326 case PACKET_EnableDisableTracepoints_feature
:
14327 case PACKET_tracenz_feature
:
14328 case PACKET_DisconnectedTracing_feature
:
14329 case PACKET_augmented_libraries_svr4_read_feature
:
14331 /* Additions to this list need to be well justified:
14332 pre-existing packets are OK; new packets are not. */
14340 /* This catches both forgetting to add a config command, and
14341 forgetting to remove a packet from the exception list. */
14342 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14346 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14347 Z sub-packet has its own set and show commands, but users may
14348 have sets to this variable in their .gdbinit files (or in their
14350 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14351 &remote_Z_packet_detect
, _("\
14352 Set use of remote protocol `Z' packets"), _("\
14353 Show use of remote protocol `Z' packets "), _("\
14354 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14356 set_remote_protocol_Z_packet_cmd
,
14357 show_remote_protocol_Z_packet_cmd
,
14358 /* FIXME: i18n: Use of remote protocol
14359 `Z' packets is %s. */
14360 &remote_set_cmdlist
, &remote_show_cmdlist
);
14362 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14363 Manipulate files on the remote system\n\
14364 Transfer files to and from the remote target system."),
14365 &remote_cmdlist
, "remote ",
14366 0 /* allow-unknown */, &cmdlist
);
14368 add_cmd ("put", class_files
, remote_put_command
,
14369 _("Copy a local file to the remote system."),
14372 add_cmd ("get", class_files
, remote_get_command
,
14373 _("Copy a remote file to the local system."),
14376 add_cmd ("delete", class_files
, remote_delete_command
,
14377 _("Delete a remote file."),
14380 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14381 &remote_exec_file_var
, _("\
14382 Set the remote pathname for \"run\""), _("\
14383 Show the remote pathname for \"run\""), NULL
,
14384 set_remote_exec_file
,
14385 show_remote_exec_file
,
14386 &remote_set_cmdlist
,
14387 &remote_show_cmdlist
);
14389 add_setshow_boolean_cmd ("range-stepping", class_run
,
14390 &use_range_stepping
, _("\
14391 Enable or disable range stepping."), _("\
14392 Show whether target-assisted range stepping is enabled."), _("\
14393 If on, and the target supports it, when stepping a source line, GDB\n\
14394 tells the target to step the corresponding range of addresses itself instead\n\
14395 of issuing multiple single-steps. This speeds up source level\n\
14396 stepping. If off, GDB always issues single-steps, even if range\n\
14397 stepping is supported by the target. The default is on."),
14398 set_range_stepping
,
14399 show_range_stepping
,
14403 /* Eventually initialize fileio. See fileio.c */
14404 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14406 /* Take advantage of the fact that the TID field is not used, to tag
14407 special ptids with it set to != 0. */
14408 magic_null_ptid
= ptid_build (42000, -1, 1);
14409 not_sent_ptid
= ptid_build (42000, -2, 1);
14410 any_thread_ptid
= ptid_build (42000, 0, 1);