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 int readchar (int timeout
);
127 static void remote_serial_write (const char *str
, int len
);
129 static void remote_kill (struct target_ops
*ops
);
131 static int remote_can_async_p (struct target_ops
*);
133 static int remote_is_async_p (struct target_ops
*);
135 static void remote_async (struct target_ops
*ops
, int enable
);
137 static void remote_thread_events (struct target_ops
*ops
, int enable
);
139 static void interrupt_query (void);
141 static void set_general_thread (ptid_t ptid
);
142 static void set_continue_thread (ptid_t ptid
);
144 static void get_offsets (void);
146 static void skip_frame (void);
148 static long read_frame (char **buf_p
, long *sizeof_buf
);
150 static int hexnumlen (ULONGEST num
);
152 static void init_remote_ops (void);
154 static void init_extended_remote_ops (void);
156 static void remote_stop (struct target_ops
*self
, ptid_t
);
158 static int stubhex (int ch
);
160 static int hexnumstr (char *, ULONGEST
);
162 static int hexnumnstr (char *, ULONGEST
, int);
164 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
166 static void print_packet (const char *);
168 static int stub_unpack_int (char *buff
, int fieldlength
);
170 static ptid_t
remote_current_thread (ptid_t oldptid
);
172 static int putpkt_binary (const char *buf
, int cnt
);
174 static void check_binary_download (CORE_ADDR addr
);
176 struct packet_config
;
178 static void show_packet_config_cmd (struct packet_config
*config
);
180 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
182 struct cmd_list_element
*c
,
185 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
186 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
188 static void remote_set_permissions (struct target_ops
*self
);
190 static int remote_get_trace_status (struct target_ops
*self
,
191 struct trace_status
*ts
);
193 static int remote_upload_tracepoints (struct target_ops
*self
,
194 struct uploaded_tp
**utpp
);
196 static int remote_upload_trace_state_variables (struct target_ops
*self
,
197 struct uploaded_tsv
**utsvp
);
199 static void remote_query_supported (void);
201 static void remote_check_symbols (void);
204 static void stop_reply_xfree (struct stop_reply
*);
205 static void remote_parse_stop_reply (char *, struct stop_reply
*);
206 static void push_stop_reply (struct stop_reply
*);
207 static void discard_pending_stop_replies_in_queue (struct remote_state
*);
208 static int peek_stop_reply (ptid_t ptid
);
210 struct threads_listing_context
;
211 static void remove_new_fork_children (struct threads_listing_context
*);
213 static void remote_async_inferior_event_handler (gdb_client_data
);
215 static void remote_terminal_ours (struct target_ops
*self
);
217 static int remote_read_description_p (struct target_ops
*target
);
219 static void remote_console_output (char *msg
);
221 static int remote_supports_cond_breakpoints (struct target_ops
*self
);
223 static int remote_can_run_breakpoint_commands (struct target_ops
*self
);
225 static void remote_btrace_reset (void);
227 static void remote_btrace_maybe_reopen (void);
229 static int stop_reply_queue_length (void);
231 static void readahead_cache_invalidate (void);
233 static void remote_unpush_and_throw (void);
235 static struct remote_state
*get_remote_state (void);
239 static struct cmd_list_element
*remote_cmdlist
;
241 /* For "set remote" and "show remote". */
243 static struct cmd_list_element
*remote_set_cmdlist
;
244 static struct cmd_list_element
*remote_show_cmdlist
;
246 /* Stub vCont actions support.
248 Each field is a boolean flag indicating whether the stub reports
249 support for the corresponding action. */
251 struct vCont_action_support
266 /* Controls whether GDB is willing to use range stepping. */
268 static int use_range_stepping
= 1;
270 #define OPAQUETHREADBYTES 8
272 /* a 64 bit opaque identifier */
273 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
275 /* About this many threadisds fit in a packet. */
277 #define MAXTHREADLISTRESULTS 32
279 /* The max number of chars in debug output. The rest of chars are
282 #define REMOTE_DEBUG_MAX_CHAR 512
284 /* Data for the vFile:pread readahead cache. */
286 struct readahead_cache
288 /* The file descriptor for the file that is being cached. -1 if the
292 /* The offset into the file that the cache buffer corresponds
296 /* The buffer holding the cache contents. */
298 /* The buffer's size. We try to read as much as fits into a packet
302 /* Cache hit and miss counters. */
307 /* Description of the remote protocol state for the currently
308 connected target. This is per-target state, and independent of the
309 selected architecture. */
313 /* A buffer to use for incoming packets, and its current size. The
314 buffer is grown dynamically for larger incoming packets.
315 Outgoing packets may also be constructed in this buffer.
316 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
317 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
322 /* True if we're going through initial connection setup (finding out
323 about the remote side's threads, relocating symbols, etc.). */
326 /* If we negotiated packet size explicitly (and thus can bypass
327 heuristics for the largest packet size that will not overflow
328 a buffer in the stub), this will be set to that packet size.
329 Otherwise zero, meaning to use the guessed size. */
330 long explicit_packet_size
;
332 /* remote_wait is normally called when the target is running and
333 waits for a stop reply packet. But sometimes we need to call it
334 when the target is already stopped. We can send a "?" packet
335 and have remote_wait read the response. Or, if we already have
336 the response, we can stash it in BUF and tell remote_wait to
337 skip calling getpkt. This flag is set when BUF contains a
338 stop reply packet and the target is not waiting. */
339 int cached_wait_status
;
341 /* True, if in no ack mode. That is, neither GDB nor the stub will
342 expect acks from each other. The connection is assumed to be
346 /* True if we're connected in extended remote mode. */
349 /* True if we resumed the target and we're waiting for the target to
350 stop. In the mean time, we can't start another command/query.
351 The remote server wouldn't be ready to process it, so we'd
352 timeout waiting for a reply that would never come and eventually
353 we'd close the connection. This can happen in asynchronous mode
354 because we allow GDB commands while the target is running. */
355 int waiting_for_stop_reply
;
357 /* The status of the stub support for the various vCont actions. */
358 struct vCont_action_support supports_vCont
;
360 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
361 responded to that. */
364 /* True if we saw a Ctrl-C while reading or writing from/to the
365 remote descriptor. At that point it is not safe to send a remote
366 interrupt packet, so we instead remember we saw the Ctrl-C and
367 process it once we're done with sending/receiving the current
368 packet, which should be shortly. If however that takes too long,
369 and the user presses Ctrl-C again, we offer to disconnect. */
370 int got_ctrlc_during_io
;
372 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
373 remote_open knows that we don't have a file open when the program
375 struct serial
*remote_desc
;
377 /* These are the threads which we last sent to the remote system. The
378 TID member will be -1 for all or -2 for not sent yet. */
379 ptid_t general_thread
;
380 ptid_t continue_thread
;
382 /* This is the traceframe which we last selected on the remote system.
383 It will be -1 if no traceframe is selected. */
384 int remote_traceframe_number
;
386 char *last_pass_packet
;
388 /* The last QProgramSignals packet sent to the target. We bypass
389 sending a new program signals list down to the target if the new
390 packet is exactly the same as the last we sent. IOW, we only let
391 the target know about program signals list changes. */
392 char *last_program_signals_packet
;
394 enum gdb_signal last_sent_signal
;
398 /* The execution direction of the last resume we got. */
399 enum exec_direction_kind last_resume_exec_dir
;
401 char *finished_object
;
402 char *finished_annex
;
403 ULONGEST finished_offset
;
405 /* Should we try the 'ThreadInfo' query packet?
407 This variable (NOT available to the user: auto-detect only!)
408 determines whether GDB will use the new, simpler "ThreadInfo"
409 query or the older, more complex syntax for thread queries.
410 This is an auto-detect variable (set to true at each connect,
411 and set to false when the target fails to recognize it). */
412 int use_threadinfo_query
;
413 int use_threadextra_query
;
415 threadref echo_nextthread
;
416 threadref nextthread
;
417 threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
419 /* The state of remote notification. */
420 struct remote_notif_state
*notif_state
;
422 /* The branch trace configuration. */
423 struct btrace_config btrace_config
;
425 /* The argument to the last "vFile:setfs:" packet we sent, used
426 to avoid sending repeated unnecessary "vFile:setfs:" packets.
427 Initialized to -1 to indicate that no "vFile:setfs:" packet
428 has yet been sent. */
431 /* A readahead cache for vFile:pread. Often, reading a binary
432 involves a sequence of small reads. E.g., when parsing an ELF
433 file. A readahead cache helps mostly the case of remote
434 debugging on a connection with higher latency, due to the
435 request/reply nature of the RSP. We only cache data for a single
436 file descriptor at a time. */
437 struct readahead_cache readahead_cache
;
440 /* Private data that we'll store in (struct thread_info)->priv. */
441 struct remote_thread_info
: public private_thread_info
447 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
448 sequence of bytes. */
449 gdb::byte_vector thread_handle
;
451 /* Whether the target stopped for a breakpoint/watchpoint. */
452 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
454 /* This is set to the data address of the access causing the target
455 to stop for a watchpoint. */
456 CORE_ADDR watch_data_address
= 0;
458 /* Fields used by the vCont action coalescing implemented in
459 remote_resume / remote_commit_resume. remote_resume stores each
460 thread's last resume request in these fields, so that a later
461 remote_commit_resume knows which is the proper action for this
462 thread to include in the vCont packet. */
464 /* True if the last target_resume call for this thread was a step
465 request, false if a continue request. */
466 int last_resume_step
= 0;
468 /* The signal specified in the last target_resume call for this
470 gdb_signal last_resume_sig
= GDB_SIGNAL_0
;
472 /* Whether this thread was already vCont-resumed on the remote
474 int vcont_resumed
= 0;
477 /* This data could be associated with a target, but we do not always
478 have access to the current target when we need it, so for now it is
479 static. This will be fine for as long as only one target is in use
481 static struct remote_state
*remote_state
;
483 static struct remote_state
*
484 get_remote_state_raw (void)
489 /* Allocate a new struct remote_state with xmalloc, initialize it, and
492 static struct remote_state
*
493 new_remote_state (void)
495 struct remote_state
*result
= XCNEW (struct remote_state
);
497 /* The default buffer size is unimportant; it will be expanded
498 whenever a larger buffer is needed. */
499 result
->buf_size
= 400;
500 result
->buf
= (char *) xmalloc (result
->buf_size
);
501 result
->remote_traceframe_number
= -1;
502 result
->last_sent_signal
= GDB_SIGNAL_0
;
503 result
->last_resume_exec_dir
= EXEC_FORWARD
;
509 /* Description of the remote protocol for a given architecture. */
513 long offset
; /* Offset into G packet. */
514 long regnum
; /* GDB's internal register number. */
515 LONGEST pnum
; /* Remote protocol register number. */
516 int in_g_packet
; /* Always part of G packet. */
517 /* long size in bytes; == register_size (target_gdbarch (), regnum);
519 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
523 struct remote_arch_state
525 /* Description of the remote protocol registers. */
526 long sizeof_g_packet
;
528 /* Description of the remote protocol registers indexed by REGNUM
529 (making an array gdbarch_num_regs in size). */
530 struct packet_reg
*regs
;
532 /* This is the size (in chars) of the first response to the ``g''
533 packet. It is used as a heuristic when determining the maximum
534 size of memory-read and memory-write packets. A target will
535 typically only reserve a buffer large enough to hold the ``g''
536 packet. The size does not include packet overhead (headers and
538 long actual_register_packet_size
;
540 /* This is the maximum size (in chars) of a non read/write packet.
541 It is also used as a cap on the size of read/write packets. */
542 long remote_packet_size
;
545 /* Utility: generate error from an incoming stub packet. */
547 trace_error (char *buf
)
550 return; /* not an error msg */
553 case '1': /* malformed packet error */
554 if (*++buf
== '0') /* general case: */
555 error (_("remote.c: error in outgoing packet."));
557 error (_("remote.c: error in outgoing packet at field #%ld."),
558 strtol (buf
, NULL
, 16));
560 error (_("Target returns error code '%s'."), buf
);
564 /* Utility: wait for reply from stub, while accepting "O" packets. */
567 remote_get_noisy_reply ()
569 struct remote_state
*rs
= get_remote_state ();
571 do /* Loop on reply from remote stub. */
575 QUIT
; /* Allow user to bail out with ^C. */
576 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
580 else if (startswith (buf
, "qRelocInsn:"))
583 CORE_ADDR from
, to
, org_to
;
585 int adjusted_size
= 0;
588 p
= buf
+ strlen ("qRelocInsn:");
589 pp
= unpack_varlen_hex (p
, &ul
);
591 error (_("invalid qRelocInsn packet: %s"), buf
);
595 unpack_varlen_hex (p
, &ul
);
602 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
605 CATCH (ex
, RETURN_MASK_ALL
)
607 if (ex
.error
== MEMORY_ERROR
)
609 /* Propagate memory errors silently back to the
610 target. The stub may have limited the range of
611 addresses we can write to, for example. */
615 /* Something unexpectedly bad happened. Be verbose
616 so we can tell what, and propagate the error back
617 to the stub, so it doesn't get stuck waiting for
619 exception_fprintf (gdb_stderr
, ex
,
620 _("warning: relocating instruction: "));
628 adjusted_size
= to
- org_to
;
630 xsnprintf (buf
, rs
->buf_size
, "qRelocInsn:%x", adjusted_size
);
634 else if (buf
[0] == 'O' && buf
[1] != 'K')
635 remote_console_output (buf
+ 1); /* 'O' message from stub */
637 return buf
; /* Here's the actual reply. */
642 /* Handle for retreving the remote protocol data from gdbarch. */
643 static struct gdbarch_data
*remote_gdbarch_data_handle
;
645 static struct remote_arch_state
*
646 get_remote_arch_state (struct gdbarch
*gdbarch
)
648 gdb_assert (gdbarch
!= NULL
);
649 return ((struct remote_arch_state
*)
650 gdbarch_data (gdbarch
, remote_gdbarch_data_handle
));
653 /* Fetch the global remote target state. */
655 static struct remote_state
*
656 get_remote_state (void)
658 /* Make sure that the remote architecture state has been
659 initialized, because doing so might reallocate rs->buf. Any
660 function which calls getpkt also needs to be mindful of changes
661 to rs->buf, but this call limits the number of places which run
663 get_remote_arch_state (target_gdbarch ());
665 return get_remote_state_raw ();
668 /* Cleanup routine for the remote module's pspace data. */
671 remote_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
673 char *remote_exec_file
= (char *) arg
;
675 xfree (remote_exec_file
);
678 /* Fetch the remote exec-file from the current program space. */
681 get_remote_exec_file (void)
683 char *remote_exec_file
;
686 = (char *) program_space_data (current_program_space
,
688 if (remote_exec_file
== NULL
)
691 return remote_exec_file
;
694 /* Set the remote exec file for PSPACE. */
697 set_pspace_remote_exec_file (struct program_space
*pspace
,
698 char *remote_exec_file
)
700 char *old_file
= (char *) program_space_data (pspace
, remote_pspace_data
);
703 set_program_space_data (pspace
, remote_pspace_data
,
704 xstrdup (remote_exec_file
));
707 /* The "set/show remote exec-file" set command hook. */
710 set_remote_exec_file (const char *ignored
, int from_tty
,
711 struct cmd_list_element
*c
)
713 gdb_assert (remote_exec_file_var
!= NULL
);
714 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
717 /* The "set/show remote exec-file" show command hook. */
720 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
721 struct cmd_list_element
*cmd
, const char *value
)
723 fprintf_filtered (file
, "%s\n", remote_exec_file_var
);
727 compare_pnums (const void *lhs_
, const void *rhs_
)
729 const struct packet_reg
* const *lhs
730 = (const struct packet_reg
* const *) lhs_
;
731 const struct packet_reg
* const *rhs
732 = (const struct packet_reg
* const *) rhs_
;
734 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
736 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
743 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
745 int regnum
, num_remote_regs
, offset
;
746 struct packet_reg
**remote_regs
;
748 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
750 struct packet_reg
*r
= ®s
[regnum
];
752 if (register_size (gdbarch
, regnum
) == 0)
753 /* Do not try to fetch zero-sized (placeholder) registers. */
756 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
761 /* Define the g/G packet format as the contents of each register
762 with a remote protocol number, in order of ascending protocol
765 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
766 for (num_remote_regs
= 0, regnum
= 0;
767 regnum
< gdbarch_num_regs (gdbarch
);
769 if (regs
[regnum
].pnum
!= -1)
770 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
772 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
775 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
777 remote_regs
[regnum
]->in_g_packet
= 1;
778 remote_regs
[regnum
]->offset
= offset
;
779 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
785 /* Given the architecture described by GDBARCH, return the remote
786 protocol register's number and the register's offset in the g/G
787 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
788 If the target does not have a mapping for REGNUM, return false,
789 otherwise, return true. */
792 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
793 int *pnum
, int *poffset
)
795 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
797 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
799 map_regcache_remote_table (gdbarch
, regs
.data ());
801 *pnum
= regs
[regnum
].pnum
;
802 *poffset
= regs
[regnum
].offset
;
808 init_remote_state (struct gdbarch
*gdbarch
)
810 struct remote_state
*rs
= get_remote_state_raw ();
811 struct remote_arch_state
*rsa
;
813 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
815 /* Use the architecture to build a regnum<->pnum table, which will be
816 1:1 unless a feature set specifies otherwise. */
817 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
818 gdbarch_num_regs (gdbarch
),
821 /* Record the maximum possible size of the g packet - it may turn out
823 rsa
->sizeof_g_packet
= map_regcache_remote_table (gdbarch
, rsa
->regs
);
825 /* Default maximum number of characters in a packet body. Many
826 remote stubs have a hardwired buffer size of 400 bytes
827 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
828 as the maximum packet-size to ensure that the packet and an extra
829 NUL character can always fit in the buffer. This stops GDB
830 trashing stubs that try to squeeze an extra NUL into what is
831 already a full buffer (As of 1999-12-04 that was most stubs). */
832 rsa
->remote_packet_size
= 400 - 1;
834 /* This one is filled in when a ``g'' packet is received. */
835 rsa
->actual_register_packet_size
= 0;
837 /* Should rsa->sizeof_g_packet needs more space than the
838 default, adjust the size accordingly. Remember that each byte is
839 encoded as two characters. 32 is the overhead for the packet
840 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
841 (``$NN:G...#NN'') is a better guess, the below has been padded a
843 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
844 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
846 /* Make sure that the packet buffer is plenty big enough for
847 this architecture. */
848 if (rs
->buf_size
< rsa
->remote_packet_size
)
850 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
851 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
857 /* Return the current allowed size of a remote packet. This is
858 inferred from the current architecture, and should be used to
859 limit the length of outgoing packets. */
861 get_remote_packet_size (void)
863 struct remote_state
*rs
= get_remote_state ();
864 remote_arch_state
*rsa
= get_remote_arch_state (target_gdbarch ());
866 if (rs
->explicit_packet_size
)
867 return rs
->explicit_packet_size
;
869 return rsa
->remote_packet_size
;
872 static struct packet_reg
*
873 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
876 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
880 struct packet_reg
*r
= &rsa
->regs
[regnum
];
882 gdb_assert (r
->regnum
== regnum
);
887 static struct packet_reg
*
888 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
893 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
895 struct packet_reg
*r
= &rsa
->regs
[i
];
903 static struct target_ops remote_ops
;
905 static struct target_ops extended_remote_ops
;
907 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
908 ``forever'' still use the normal timeout mechanism. This is
909 currently used by the ASYNC code to guarentee that target reads
910 during the initial connect always time-out. Once getpkt has been
911 modified to return a timeout indication and, in turn
912 remote_wait()/wait_for_inferior() have gained a timeout parameter
914 static int wait_forever_enabled_p
= 1;
916 /* Allow the user to specify what sequence to send to the remote
917 when he requests a program interruption: Although ^C is usually
918 what remote systems expect (this is the default, here), it is
919 sometimes preferable to send a break. On other systems such
920 as the Linux kernel, a break followed by g, which is Magic SysRq g
921 is required in order to interrupt the execution. */
922 const char interrupt_sequence_control_c
[] = "Ctrl-C";
923 const char interrupt_sequence_break
[] = "BREAK";
924 const char interrupt_sequence_break_g
[] = "BREAK-g";
925 static const char *const interrupt_sequence_modes
[] =
927 interrupt_sequence_control_c
,
928 interrupt_sequence_break
,
929 interrupt_sequence_break_g
,
932 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
935 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
936 struct cmd_list_element
*c
,
939 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
940 fprintf_filtered (file
,
941 _("Send the ASCII ETX character (Ctrl-c) "
942 "to the remote target to interrupt the "
943 "execution of the program.\n"));
944 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
945 fprintf_filtered (file
,
946 _("send a break signal to the remote target "
947 "to interrupt the execution of the program.\n"));
948 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
949 fprintf_filtered (file
,
950 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
951 "the remote target to interrupt the execution "
952 "of Linux kernel.\n"));
954 internal_error (__FILE__
, __LINE__
,
955 _("Invalid value for interrupt_sequence_mode: %s."),
956 interrupt_sequence_mode
);
959 /* This boolean variable specifies whether interrupt_sequence is sent
960 to the remote target when gdb connects to it.
961 This is mostly needed when you debug the Linux kernel: The Linux kernel
962 expects BREAK g which is Magic SysRq g for connecting gdb. */
963 static int interrupt_on_connect
= 0;
965 /* This variable is used to implement the "set/show remotebreak" commands.
966 Since these commands are now deprecated in favor of "set/show remote
967 interrupt-sequence", it no longer has any effect on the code. */
968 static int remote_break
;
971 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
974 interrupt_sequence_mode
= interrupt_sequence_break
;
976 interrupt_sequence_mode
= interrupt_sequence_control_c
;
980 show_remotebreak (struct ui_file
*file
, int from_tty
,
981 struct cmd_list_element
*c
,
986 /* This variable sets the number of bits in an address that are to be
987 sent in a memory ("M" or "m") packet. Normally, after stripping
988 leading zeros, the entire address would be sent. This variable
989 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
990 initial implementation of remote.c restricted the address sent in
991 memory packets to ``host::sizeof long'' bytes - (typically 32
992 bits). Consequently, for 64 bit targets, the upper 32 bits of an
993 address was never sent. Since fixing this bug may cause a break in
994 some remote targets this variable is principly provided to
995 facilitate backward compatibility. */
997 static unsigned int remote_address_size
;
1000 /* User configurable variables for the number of characters in a
1001 memory read/write packet. MIN (rsa->remote_packet_size,
1002 rsa->sizeof_g_packet) is the default. Some targets need smaller
1003 values (fifo overruns, et.al.) and some users need larger values
1004 (speed up transfers). The variables ``preferred_*'' (the user
1005 request), ``current_*'' (what was actually set) and ``forced_*''
1006 (Positive - a soft limit, negative - a hard limit). */
1008 struct memory_packet_config
1015 /* The default max memory-write-packet-size. The 16k is historical.
1016 (It came from older GDB's using alloca for buffers and the
1017 knowledge (folklore?) that some hosts don't cope very well with
1018 large alloca calls.) */
1019 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1021 /* The minimum remote packet size for memory transfers. Ensures we
1022 can write at least one byte. */
1023 #define MIN_MEMORY_PACKET_SIZE 20
1025 /* Compute the current size of a read/write packet. Since this makes
1026 use of ``actual_register_packet_size'' the computation is dynamic. */
1029 get_memory_packet_size (struct memory_packet_config
*config
)
1031 struct remote_state
*rs
= get_remote_state ();
1032 remote_arch_state
*rsa
= get_remote_arch_state (target_gdbarch ());
1035 if (config
->fixed_p
)
1037 if (config
->size
<= 0)
1038 what_they_get
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1040 what_they_get
= config
->size
;
1044 what_they_get
= get_remote_packet_size ();
1045 /* Limit the packet to the size specified by the user. */
1046 if (config
->size
> 0
1047 && what_they_get
> config
->size
)
1048 what_they_get
= config
->size
;
1050 /* Limit it to the size of the targets ``g'' response unless we have
1051 permission from the stub to use a larger packet size. */
1052 if (rs
->explicit_packet_size
== 0
1053 && rsa
->actual_register_packet_size
> 0
1054 && what_they_get
> rsa
->actual_register_packet_size
)
1055 what_they_get
= rsa
->actual_register_packet_size
;
1057 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1058 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1060 /* Make sure there is room in the global buffer for this packet
1061 (including its trailing NUL byte). */
1062 if (rs
->buf_size
< what_they_get
+ 1)
1064 rs
->buf_size
= 2 * what_they_get
;
1065 rs
->buf
= (char *) xrealloc (rs
->buf
, 2 * what_they_get
);
1068 return what_they_get
;
1071 /* Update the size of a read/write packet. If they user wants
1072 something really big then do a sanity check. */
1075 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1077 int fixed_p
= config
->fixed_p
;
1078 long size
= config
->size
;
1081 error (_("Argument required (integer, `fixed' or `limited')."));
1082 else if (strcmp (args
, "hard") == 0
1083 || strcmp (args
, "fixed") == 0)
1085 else if (strcmp (args
, "soft") == 0
1086 || strcmp (args
, "limit") == 0)
1092 size
= strtoul (args
, &end
, 0);
1094 error (_("Invalid %s (bad syntax)."), config
->name
);
1096 /* Instead of explicitly capping the size of a packet to or
1097 disallowing it, the user is allowed to set the size to
1098 something arbitrarily large. */
1101 /* So that the query shows the correct value. */
1103 size
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1106 if (fixed_p
&& !config
->fixed_p
)
1108 if (! query (_("The target may not be able to correctly handle a %s\n"
1109 "of %ld bytes. Change the packet size? "),
1110 config
->name
, size
))
1111 error (_("Packet size not changed."));
1113 /* Update the config. */
1114 config
->fixed_p
= fixed_p
;
1115 config
->size
= size
;
1119 show_memory_packet_size (struct memory_packet_config
*config
)
1121 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1122 if (config
->fixed_p
)
1123 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1124 get_memory_packet_size (config
));
1126 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1127 get_memory_packet_size (config
));
1130 static struct memory_packet_config memory_write_packet_config
=
1132 "memory-write-packet-size",
1136 set_memory_write_packet_size (const char *args
, int from_tty
)
1138 set_memory_packet_size (args
, &memory_write_packet_config
);
1142 show_memory_write_packet_size (const char *args
, int from_tty
)
1144 show_memory_packet_size (&memory_write_packet_config
);
1148 get_memory_write_packet_size (void)
1150 return get_memory_packet_size (&memory_write_packet_config
);
1153 static struct memory_packet_config memory_read_packet_config
=
1155 "memory-read-packet-size",
1159 set_memory_read_packet_size (const char *args
, int from_tty
)
1161 set_memory_packet_size (args
, &memory_read_packet_config
);
1165 show_memory_read_packet_size (const char *args
, int from_tty
)
1167 show_memory_packet_size (&memory_read_packet_config
);
1171 get_memory_read_packet_size (void)
1173 long size
= get_memory_packet_size (&memory_read_packet_config
);
1175 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1176 extra buffer size argument before the memory read size can be
1177 increased beyond this. */
1178 if (size
> get_remote_packet_size ())
1179 size
= get_remote_packet_size ();
1184 /* Generic configuration support for packets the stub optionally
1185 supports. Allows the user to specify the use of the packet as well
1186 as allowing GDB to auto-detect support in the remote stub. */
1190 PACKET_SUPPORT_UNKNOWN
= 0,
1195 struct packet_config
1200 /* If auto, GDB auto-detects support for this packet or feature,
1201 either through qSupported, or by trying the packet and looking
1202 at the response. If true, GDB assumes the target supports this
1203 packet. If false, the packet is disabled. Configs that don't
1204 have an associated command always have this set to auto. */
1205 enum auto_boolean detect
;
1207 /* Does the target support this packet? */
1208 enum packet_support support
;
1211 /* Analyze a packet's return value and update the packet config
1221 static enum packet_support
packet_config_support (struct packet_config
*config
);
1222 static enum packet_support
packet_support (int packet
);
1225 show_packet_config_cmd (struct packet_config
*config
)
1227 const char *support
= "internal-error";
1229 switch (packet_config_support (config
))
1232 support
= "enabled";
1234 case PACKET_DISABLE
:
1235 support
= "disabled";
1237 case PACKET_SUPPORT_UNKNOWN
:
1238 support
= "unknown";
1241 switch (config
->detect
)
1243 case AUTO_BOOLEAN_AUTO
:
1244 printf_filtered (_("Support for the `%s' packet "
1245 "is auto-detected, currently %s.\n"),
1246 config
->name
, support
);
1248 case AUTO_BOOLEAN_TRUE
:
1249 case AUTO_BOOLEAN_FALSE
:
1250 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1251 config
->name
, support
);
1257 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1258 const char *title
, int legacy
)
1264 config
->name
= name
;
1265 config
->title
= title
;
1266 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1268 show_doc
= xstrprintf ("Show current use of remote "
1269 "protocol `%s' (%s) packet",
1271 /* set/show TITLE-packet {auto,on,off} */
1272 cmd_name
= xstrprintf ("%s-packet", title
);
1273 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1274 &config
->detect
, set_doc
,
1275 show_doc
, NULL
, /* help_doc */
1277 show_remote_protocol_packet_cmd
,
1278 &remote_set_cmdlist
, &remote_show_cmdlist
);
1279 /* The command code copies the documentation strings. */
1282 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1287 legacy_name
= xstrprintf ("%s-packet", name
);
1288 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1289 &remote_set_cmdlist
);
1290 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1291 &remote_show_cmdlist
);
1295 static enum packet_result
1296 packet_check_result (const char *buf
)
1300 /* The stub recognized the packet request. Check that the
1301 operation succeeded. */
1303 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1305 /* "Enn" - definitly an error. */
1306 return PACKET_ERROR
;
1308 /* Always treat "E." as an error. This will be used for
1309 more verbose error messages, such as E.memtypes. */
1310 if (buf
[0] == 'E' && buf
[1] == '.')
1311 return PACKET_ERROR
;
1313 /* The packet may or may not be OK. Just assume it is. */
1317 /* The stub does not support the packet. */
1318 return PACKET_UNKNOWN
;
1321 static enum packet_result
1322 packet_ok (const char *buf
, struct packet_config
*config
)
1324 enum packet_result result
;
1326 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1327 && config
->support
== PACKET_DISABLE
)
1328 internal_error (__FILE__
, __LINE__
,
1329 _("packet_ok: attempt to use a disabled packet"));
1331 result
= packet_check_result (buf
);
1336 /* The stub recognized the packet request. */
1337 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1340 fprintf_unfiltered (gdb_stdlog
,
1341 "Packet %s (%s) is supported\n",
1342 config
->name
, config
->title
);
1343 config
->support
= PACKET_ENABLE
;
1346 case PACKET_UNKNOWN
:
1347 /* The stub does not support the packet. */
1348 if (config
->detect
== AUTO_BOOLEAN_AUTO
1349 && config
->support
== PACKET_ENABLE
)
1351 /* If the stub previously indicated that the packet was
1352 supported then there is a protocol error. */
1353 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1354 config
->name
, config
->title
);
1356 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1358 /* The user set it wrong. */
1359 error (_("Enabled packet %s (%s) not recognized by stub"),
1360 config
->name
, config
->title
);
1364 fprintf_unfiltered (gdb_stdlog
,
1365 "Packet %s (%s) is NOT supported\n",
1366 config
->name
, config
->title
);
1367 config
->support
= PACKET_DISABLE
;
1388 PACKET_vFile_pwrite
,
1390 PACKET_vFile_unlink
,
1391 PACKET_vFile_readlink
,
1394 PACKET_qXfer_features
,
1395 PACKET_qXfer_exec_file
,
1396 PACKET_qXfer_libraries
,
1397 PACKET_qXfer_libraries_svr4
,
1398 PACKET_qXfer_memory_map
,
1399 PACKET_qXfer_spu_read
,
1400 PACKET_qXfer_spu_write
,
1401 PACKET_qXfer_osdata
,
1402 PACKET_qXfer_threads
,
1403 PACKET_qXfer_statictrace_read
,
1404 PACKET_qXfer_traceframe_info
,
1410 PACKET_QPassSignals
,
1411 PACKET_QCatchSyscalls
,
1412 PACKET_QProgramSignals
,
1413 PACKET_QSetWorkingDir
,
1414 PACKET_QStartupWithShell
,
1415 PACKET_QEnvironmentHexEncoded
,
1416 PACKET_QEnvironmentReset
,
1417 PACKET_QEnvironmentUnset
,
1419 PACKET_qSearch_memory
,
1422 PACKET_QStartNoAckMode
,
1424 PACKET_qXfer_siginfo_read
,
1425 PACKET_qXfer_siginfo_write
,
1428 /* Support for conditional tracepoints. */
1429 PACKET_ConditionalTracepoints
,
1431 /* Support for target-side breakpoint conditions. */
1432 PACKET_ConditionalBreakpoints
,
1434 /* Support for target-side breakpoint commands. */
1435 PACKET_BreakpointCommands
,
1437 /* Support for fast tracepoints. */
1438 PACKET_FastTracepoints
,
1440 /* Support for static tracepoints. */
1441 PACKET_StaticTracepoints
,
1443 /* Support for installing tracepoints while a trace experiment is
1445 PACKET_InstallInTrace
,
1449 PACKET_TracepointSource
,
1452 PACKET_QDisableRandomization
,
1454 PACKET_QTBuffer_size
,
1458 PACKET_qXfer_btrace
,
1460 /* Support for the QNonStop packet. */
1463 /* Support for the QThreadEvents packet. */
1464 PACKET_QThreadEvents
,
1466 /* Support for multi-process extensions. */
1467 PACKET_multiprocess_feature
,
1469 /* Support for enabling and disabling tracepoints while a trace
1470 experiment is running. */
1471 PACKET_EnableDisableTracepoints_feature
,
1473 /* Support for collecting strings using the tracenz bytecode. */
1474 PACKET_tracenz_feature
,
1476 /* Support for continuing to run a trace experiment while GDB is
1478 PACKET_DisconnectedTracing_feature
,
1480 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1481 PACKET_augmented_libraries_svr4_read_feature
,
1483 /* Support for the qXfer:btrace-conf:read packet. */
1484 PACKET_qXfer_btrace_conf
,
1486 /* Support for the Qbtrace-conf:bts:size packet. */
1487 PACKET_Qbtrace_conf_bts_size
,
1489 /* Support for swbreak+ feature. */
1490 PACKET_swbreak_feature
,
1492 /* Support for hwbreak+ feature. */
1493 PACKET_hwbreak_feature
,
1495 /* Support for fork events. */
1496 PACKET_fork_event_feature
,
1498 /* Support for vfork events. */
1499 PACKET_vfork_event_feature
,
1501 /* Support for the Qbtrace-conf:pt:size packet. */
1502 PACKET_Qbtrace_conf_pt_size
,
1504 /* Support for exec events. */
1505 PACKET_exec_event_feature
,
1507 /* Support for query supported vCont actions. */
1508 PACKET_vContSupported
,
1510 /* Support remote CTRL-C. */
1513 /* Support TARGET_WAITKIND_NO_RESUMED. */
1519 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1521 /* Returns the packet's corresponding "set remote foo-packet" command
1522 state. See struct packet_config for more details. */
1524 static enum auto_boolean
1525 packet_set_cmd_state (int packet
)
1527 return remote_protocol_packets
[packet
].detect
;
1530 /* Returns whether a given packet or feature is supported. This takes
1531 into account the state of the corresponding "set remote foo-packet"
1532 command, which may be used to bypass auto-detection. */
1534 static enum packet_support
1535 packet_config_support (struct packet_config
*config
)
1537 switch (config
->detect
)
1539 case AUTO_BOOLEAN_TRUE
:
1540 return PACKET_ENABLE
;
1541 case AUTO_BOOLEAN_FALSE
:
1542 return PACKET_DISABLE
;
1543 case AUTO_BOOLEAN_AUTO
:
1544 return config
->support
;
1546 gdb_assert_not_reached (_("bad switch"));
1550 /* Same as packet_config_support, but takes the packet's enum value as
1553 static enum packet_support
1554 packet_support (int packet
)
1556 struct packet_config
*config
= &remote_protocol_packets
[packet
];
1558 return packet_config_support (config
);
1562 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1563 struct cmd_list_element
*c
,
1566 struct packet_config
*packet
;
1568 for (packet
= remote_protocol_packets
;
1569 packet
< &remote_protocol_packets
[PACKET_MAX
];
1572 if (&packet
->detect
== c
->var
)
1574 show_packet_config_cmd (packet
);
1578 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1582 /* Should we try one of the 'Z' requests? */
1586 Z_PACKET_SOFTWARE_BP
,
1587 Z_PACKET_HARDWARE_BP
,
1594 /* For compatibility with older distributions. Provide a ``set remote
1595 Z-packet ...'' command that updates all the Z packet types. */
1597 static enum auto_boolean remote_Z_packet_detect
;
1600 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
1601 struct cmd_list_element
*c
)
1605 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1606 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1610 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1611 struct cmd_list_element
*c
,
1616 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1618 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1622 /* Returns true if the multi-process extensions are in effect. */
1625 remote_multi_process_p (struct remote_state
*rs
)
1627 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
1630 /* Returns true if fork events are supported. */
1633 remote_fork_event_p (struct remote_state
*rs
)
1635 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
1638 /* Returns true if vfork events are supported. */
1641 remote_vfork_event_p (struct remote_state
*rs
)
1643 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
1646 /* Returns true if exec events are supported. */
1649 remote_exec_event_p (struct remote_state
*rs
)
1651 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
1654 /* Insert fork catchpoint target routine. If fork events are enabled
1655 then return success, nothing more to do. */
1658 remote_insert_fork_catchpoint (struct target_ops
*ops
, int pid
)
1660 struct remote_state
*rs
= get_remote_state ();
1662 return !remote_fork_event_p (rs
);
1665 /* Remove fork catchpoint target routine. Nothing to do, just
1669 remote_remove_fork_catchpoint (struct target_ops
*ops
, int pid
)
1674 /* Insert vfork catchpoint target routine. If vfork events are enabled
1675 then return success, nothing more to do. */
1678 remote_insert_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1680 struct remote_state
*rs
= get_remote_state ();
1682 return !remote_vfork_event_p (rs
);
1685 /* Remove vfork catchpoint target routine. Nothing to do, just
1689 remote_remove_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1694 /* Insert exec catchpoint target routine. If exec events are
1695 enabled, just return success. */
1698 remote_insert_exec_catchpoint (struct target_ops
*ops
, int pid
)
1700 struct remote_state
*rs
= get_remote_state ();
1702 return !remote_exec_event_p (rs
);
1705 /* Remove exec catchpoint target routine. Nothing to do, just
1709 remote_remove_exec_catchpoint (struct target_ops
*ops
, int pid
)
1715 /* Asynchronous signal handle registered as event loop source for
1716 when we have pending events ready to be passed to the core. */
1718 static struct async_event_handler
*remote_async_inferior_event_token
;
1722 static ptid_t magic_null_ptid
;
1723 static ptid_t not_sent_ptid
;
1724 static ptid_t any_thread_ptid
;
1726 /* Find out if the stub attached to PID (and hence GDB should offer to
1727 detach instead of killing it when bailing out). */
1730 remote_query_attached (int pid
)
1732 struct remote_state
*rs
= get_remote_state ();
1733 size_t size
= get_remote_packet_size ();
1735 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
1738 if (remote_multi_process_p (rs
))
1739 xsnprintf (rs
->buf
, size
, "qAttached:%x", pid
);
1741 xsnprintf (rs
->buf
, size
, "qAttached");
1744 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1746 switch (packet_ok (rs
->buf
,
1747 &remote_protocol_packets
[PACKET_qAttached
]))
1750 if (strcmp (rs
->buf
, "1") == 0)
1754 warning (_("Remote failure reply: %s"), rs
->buf
);
1756 case PACKET_UNKNOWN
:
1763 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1764 has been invented by GDB, instead of reported by the target. Since
1765 we can be connected to a remote system before before knowing about
1766 any inferior, mark the target with execution when we find the first
1767 inferior. If ATTACHED is 1, then we had just attached to this
1768 inferior. If it is 0, then we just created this inferior. If it
1769 is -1, then try querying the remote stub to find out if it had
1770 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1771 attempt to open this inferior's executable as the main executable
1772 if no main executable is open already. */
1774 static struct inferior
*
1775 remote_add_inferior (int fake_pid_p
, int pid
, int attached
,
1778 struct inferior
*inf
;
1780 /* Check whether this process we're learning about is to be
1781 considered attached, or if is to be considered to have been
1782 spawned by the stub. */
1784 attached
= remote_query_attached (pid
);
1786 if (gdbarch_has_global_solist (target_gdbarch ()))
1788 /* If the target shares code across all inferiors, then every
1789 attach adds a new inferior. */
1790 inf
= add_inferior (pid
);
1792 /* ... and every inferior is bound to the same program space.
1793 However, each inferior may still have its own address
1795 inf
->aspace
= maybe_new_address_space ();
1796 inf
->pspace
= current_program_space
;
1800 /* In the traditional debugging scenario, there's a 1-1 match
1801 between program/address spaces. We simply bind the inferior
1802 to the program space's address space. */
1803 inf
= current_inferior ();
1804 inferior_appeared (inf
, pid
);
1807 inf
->attach_flag
= attached
;
1808 inf
->fake_pid_p
= fake_pid_p
;
1810 /* If no main executable is currently open then attempt to
1811 open the file that was executed to create this inferior. */
1812 if (try_open_exec
&& get_exec_file (0) == NULL
)
1813 exec_file_locate_attach (pid
, 0, 1);
1818 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
1820 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1821 according to RUNNING. */
1824 remote_add_thread (ptid_t ptid
, int running
, int executing
)
1826 struct remote_state
*rs
= get_remote_state ();
1827 struct thread_info
*thread
;
1829 /* GDB historically didn't pull threads in the initial connection
1830 setup. If the remote target doesn't even have a concept of
1831 threads (e.g., a bare-metal target), even if internally we
1832 consider that a single-threaded target, mentioning a new thread
1833 might be confusing to the user. Be silent then, preserving the
1834 age old behavior. */
1835 if (rs
->starting_up
)
1836 thread
= add_thread_silent (ptid
);
1838 thread
= add_thread (ptid
);
1840 get_remote_thread_info (thread
)->vcont_resumed
= executing
;
1841 set_executing (ptid
, executing
);
1842 set_running (ptid
, running
);
1845 /* Come here when we learn about a thread id from the remote target.
1846 It may be the first time we hear about such thread, so take the
1847 opportunity to add it to GDB's thread list. In case this is the
1848 first time we're noticing its corresponding inferior, add it to
1849 GDB's inferior list as well. EXECUTING indicates whether the
1850 thread is (internally) executing or stopped. */
1853 remote_notice_new_inferior (ptid_t currthread
, int executing
)
1855 /* In non-stop mode, we assume new found threads are (externally)
1856 running until proven otherwise with a stop reply. In all-stop,
1857 we can only get here if all threads are stopped. */
1858 int running
= target_is_non_stop_p () ? 1 : 0;
1860 /* If this is a new thread, add it to GDB's thread list.
1861 If we leave it up to WFI to do this, bad things will happen. */
1863 if (in_thread_list (currthread
) && is_exited (currthread
))
1865 /* We're seeing an event on a thread id we knew had exited.
1866 This has to be a new thread reusing the old id. Add it. */
1867 remote_add_thread (currthread
, running
, executing
);
1871 if (!in_thread_list (currthread
))
1873 struct inferior
*inf
= NULL
;
1874 int pid
= ptid_get_pid (currthread
);
1876 if (ptid_is_pid (inferior_ptid
)
1877 && pid
== ptid_get_pid (inferior_ptid
))
1879 /* inferior_ptid has no thread member yet. This can happen
1880 with the vAttach -> remote_wait,"TAAthread:" path if the
1881 stub doesn't support qC. This is the first stop reported
1882 after an attach, so this is the main thread. Update the
1883 ptid in the thread list. */
1884 if (in_thread_list (pid_to_ptid (pid
)))
1885 thread_change_ptid (inferior_ptid
, currthread
);
1888 remote_add_thread (currthread
, running
, executing
);
1889 inferior_ptid
= currthread
;
1894 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1896 /* inferior_ptid is not set yet. This can happen with the
1897 vRun -> remote_wait,"TAAthread:" path if the stub
1898 doesn't support qC. This is the first stop reported
1899 after an attach, so this is the main thread. Update the
1900 ptid in the thread list. */
1901 thread_change_ptid (inferior_ptid
, currthread
);
1905 /* When connecting to a target remote, or to a target
1906 extended-remote which already was debugging an inferior, we
1907 may not know about it yet. Add it before adding its child
1908 thread, so notifications are emitted in a sensible order. */
1909 if (!in_inferior_list (ptid_get_pid (currthread
)))
1911 struct remote_state
*rs
= get_remote_state ();
1912 int fake_pid_p
= !remote_multi_process_p (rs
);
1914 inf
= remote_add_inferior (fake_pid_p
,
1915 ptid_get_pid (currthread
), -1, 1);
1918 /* This is really a new thread. Add it. */
1919 remote_add_thread (currthread
, running
, executing
);
1921 /* If we found a new inferior, let the common code do whatever
1922 it needs to with it (e.g., read shared libraries, insert
1923 breakpoints), unless we're just setting up an all-stop
1927 struct remote_state
*rs
= get_remote_state ();
1929 if (!rs
->starting_up
)
1930 notice_new_inferior (currthread
, executing
, 0);
1935 /* Return THREAD's private thread data, creating it if necessary. */
1937 static remote_thread_info
*
1938 get_remote_thread_info (thread_info
*thread
)
1940 gdb_assert (thread
!= NULL
);
1942 if (thread
->priv
== NULL
)
1943 thread
->priv
.reset (new remote_thread_info
);
1945 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
1948 /* Return PTID's private thread data, creating it if necessary. */
1950 static remote_thread_info
*
1951 get_remote_thread_info (ptid_t ptid
)
1953 struct thread_info
*info
= find_thread_ptid (ptid
);
1955 return get_remote_thread_info (info
);
1958 /* Call this function as a result of
1959 1) A halt indication (T packet) containing a thread id
1960 2) A direct query of currthread
1961 3) Successful execution of set thread */
1964 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
1966 rs
->general_thread
= currthread
;
1969 /* If 'QPassSignals' is supported, tell the remote stub what signals
1970 it can simply pass through to the inferior without reporting. */
1973 remote_pass_signals (struct target_ops
*self
,
1974 int numsigs
, unsigned char *pass_signals
)
1976 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
1978 char *pass_packet
, *p
;
1980 struct remote_state
*rs
= get_remote_state ();
1982 gdb_assert (numsigs
< 256);
1983 for (i
= 0; i
< numsigs
; i
++)
1985 if (pass_signals
[i
])
1988 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1989 strcpy (pass_packet
, "QPassSignals:");
1990 p
= pass_packet
+ strlen (pass_packet
);
1991 for (i
= 0; i
< numsigs
; i
++)
1993 if (pass_signals
[i
])
1996 *p
++ = tohex (i
>> 4);
1997 *p
++ = tohex (i
& 15);
2006 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2008 putpkt (pass_packet
);
2009 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2010 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2011 if (rs
->last_pass_packet
)
2012 xfree (rs
->last_pass_packet
);
2013 rs
->last_pass_packet
= pass_packet
;
2016 xfree (pass_packet
);
2020 /* If 'QCatchSyscalls' is supported, tell the remote stub
2021 to report syscalls to GDB. */
2024 remote_set_syscall_catchpoint (struct target_ops
*self
,
2025 int pid
, bool needed
, int any_count
,
2026 gdb::array_view
<const int> syscall_counts
)
2028 const char *catch_packet
;
2029 enum packet_result result
;
2032 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2034 /* Not supported. */
2038 if (needed
&& any_count
== 0)
2040 /* Count how many syscalls are to be caught. */
2041 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2043 if (syscall_counts
[i
] != 0)
2050 fprintf_unfiltered (gdb_stdlog
,
2051 "remote_set_syscall_catchpoint "
2052 "pid %d needed %d any_count %d n_sysno %d\n",
2053 pid
, needed
, any_count
, n_sysno
);
2056 std::string built_packet
;
2059 /* Prepare a packet with the sysno list, assuming max 8+1
2060 characters for a sysno. If the resulting packet size is too
2061 big, fallback on the non-selective packet. */
2062 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2063 built_packet
.reserve (maxpktsz
);
2064 built_packet
= "QCatchSyscalls:1";
2067 /* Add in each syscall to be caught. */
2068 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2070 if (syscall_counts
[i
] != 0)
2071 string_appendf (built_packet
, ";%zx", i
);
2074 if (built_packet
.size () > get_remote_packet_size ())
2076 /* catch_packet too big. Fallback to less efficient
2077 non selective mode, with GDB doing the filtering. */
2078 catch_packet
= "QCatchSyscalls:1";
2081 catch_packet
= built_packet
.c_str ();
2084 catch_packet
= "QCatchSyscalls:0";
2086 struct remote_state
*rs
= get_remote_state ();
2088 putpkt (catch_packet
);
2089 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2090 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2091 if (result
== PACKET_OK
)
2097 /* If 'QProgramSignals' is supported, tell the remote stub what
2098 signals it should pass through to the inferior when detaching. */
2101 remote_program_signals (struct target_ops
*self
,
2102 int numsigs
, unsigned char *signals
)
2104 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2108 struct remote_state
*rs
= get_remote_state ();
2110 gdb_assert (numsigs
< 256);
2111 for (i
= 0; i
< numsigs
; i
++)
2116 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2117 strcpy (packet
, "QProgramSignals:");
2118 p
= packet
+ strlen (packet
);
2119 for (i
= 0; i
< numsigs
; i
++)
2121 if (signal_pass_state (i
))
2124 *p
++ = tohex (i
>> 4);
2125 *p
++ = tohex (i
& 15);
2134 if (!rs
->last_program_signals_packet
2135 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2138 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2139 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2140 xfree (rs
->last_program_signals_packet
);
2141 rs
->last_program_signals_packet
= packet
;
2148 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2149 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2150 thread. If GEN is set, set the general thread, if not, then set
2151 the step/continue thread. */
2153 set_thread (ptid_t ptid
, int gen
)
2155 struct remote_state
*rs
= get_remote_state ();
2156 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2157 char *buf
= rs
->buf
;
2158 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
2160 if (ptid_equal (state
, ptid
))
2164 *buf
++ = gen
? 'g' : 'c';
2165 if (ptid_equal (ptid
, magic_null_ptid
))
2166 xsnprintf (buf
, endbuf
- buf
, "0");
2167 else if (ptid_equal (ptid
, any_thread_ptid
))
2168 xsnprintf (buf
, endbuf
- buf
, "0");
2169 else if (ptid_equal (ptid
, minus_one_ptid
))
2170 xsnprintf (buf
, endbuf
- buf
, "-1");
2172 write_ptid (buf
, endbuf
, ptid
);
2174 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2176 rs
->general_thread
= ptid
;
2178 rs
->continue_thread
= ptid
;
2182 set_general_thread (ptid_t ptid
)
2184 set_thread (ptid
, 1);
2188 set_continue_thread (ptid_t ptid
)
2190 set_thread (ptid
, 0);
2193 /* Change the remote current process. Which thread within the process
2194 ends up selected isn't important, as long as it is the same process
2195 as what INFERIOR_PTID points to.
2197 This comes from that fact that there is no explicit notion of
2198 "selected process" in the protocol. The selected process for
2199 general operations is the process the selected general thread
2203 set_general_process (void)
2205 struct remote_state
*rs
= get_remote_state ();
2207 /* If the remote can't handle multiple processes, don't bother. */
2208 if (!remote_multi_process_p (rs
))
2211 /* We only need to change the remote current thread if it's pointing
2212 at some other process. */
2213 if (ptid_get_pid (rs
->general_thread
) != ptid_get_pid (inferior_ptid
))
2214 set_general_thread (inferior_ptid
);
2218 /* Return nonzero if this is the main thread that we made up ourselves
2219 to model non-threaded targets as single-threaded. */
2222 remote_thread_always_alive (struct target_ops
*ops
, ptid_t ptid
)
2224 if (ptid_equal (ptid
, magic_null_ptid
))
2225 /* The main thread is always alive. */
2228 if (ptid_get_pid (ptid
) != 0 && ptid_get_lwp (ptid
) == 0)
2229 /* The main thread is always alive. This can happen after a
2230 vAttach, if the remote side doesn't support
2237 /* Return nonzero if the thread PTID is still alive on the remote
2241 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2243 struct remote_state
*rs
= get_remote_state ();
2246 /* Check if this is a thread that we made up ourselves to model
2247 non-threaded targets as single-threaded. */
2248 if (remote_thread_always_alive (ops
, ptid
))
2252 endp
= rs
->buf
+ get_remote_packet_size ();
2255 write_ptid (p
, endp
, ptid
);
2258 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2259 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2262 /* Return a pointer to a thread name if we know it and NULL otherwise.
2263 The thread_info object owns the memory for the name. */
2266 remote_thread_name (struct target_ops
*ops
, struct thread_info
*info
)
2268 if (info
->priv
!= NULL
)
2270 const std::string
&name
= get_remote_thread_info (info
)->name
;
2271 return !name
.empty () ? name
.c_str () : NULL
;
2277 /* About these extended threadlist and threadinfo packets. They are
2278 variable length packets but, the fields within them are often fixed
2279 length. They are redundent enough to send over UDP as is the
2280 remote protocol in general. There is a matching unit test module
2283 /* WARNING: This threadref data structure comes from the remote O.S.,
2284 libstub protocol encoding, and remote.c. It is not particularly
2287 /* Right now, the internal structure is int. We want it to be bigger.
2288 Plan to fix this. */
2290 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2292 /* gdb_ext_thread_info is an internal GDB data structure which is
2293 equivalent to the reply of the remote threadinfo packet. */
2295 struct gdb_ext_thread_info
2297 threadref threadid
; /* External form of thread reference. */
2298 int active
; /* Has state interesting to GDB?
2300 char display
[256]; /* Brief state display, name,
2301 blocked/suspended. */
2302 char shortname
[32]; /* To be used to name threads. */
2303 char more_display
[256]; /* Long info, statistics, queue depth,
2307 /* The volume of remote transfers can be limited by submitting
2308 a mask containing bits specifying the desired information.
2309 Use a union of these values as the 'selection' parameter to
2310 get_thread_info. FIXME: Make these TAG names more thread specific. */
2312 #define TAG_THREADID 1
2313 #define TAG_EXISTS 2
2314 #define TAG_DISPLAY 4
2315 #define TAG_THREADNAME 8
2316 #define TAG_MOREDISPLAY 16
2318 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2320 static char *unpack_nibble (char *buf
, int *val
);
2322 static char *unpack_byte (char *buf
, int *value
);
2324 static char *pack_int (char *buf
, int value
);
2326 static char *unpack_int (char *buf
, int *value
);
2328 static char *unpack_string (char *src
, char *dest
, int length
);
2330 static char *pack_threadid (char *pkt
, threadref
*id
);
2332 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2334 void int_to_threadref (threadref
*id
, int value
);
2336 static int threadref_to_int (threadref
*ref
);
2338 static void copy_threadref (threadref
*dest
, threadref
*src
);
2340 static int threadmatch (threadref
*dest
, threadref
*src
);
2342 static char *pack_threadinfo_request (char *pkt
, int mode
,
2345 static int remote_unpack_thread_info_response (char *pkt
,
2346 threadref
*expectedref
,
2347 struct gdb_ext_thread_info
2351 static int remote_get_threadinfo (threadref
*threadid
,
2352 int fieldset
, /*TAG mask */
2353 struct gdb_ext_thread_info
*info
);
2355 static char *pack_threadlist_request (char *pkt
, int startflag
,
2357 threadref
*nextthread
);
2359 static int parse_threadlist_response (char *pkt
,
2361 threadref
*original_echo
,
2362 threadref
*resultlist
,
2365 static int remote_get_threadlist (int startflag
,
2366 threadref
*nextthread
,
2370 threadref
*threadlist
);
2372 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
2374 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
2375 void *context
, int looplimit
);
2377 static int remote_newthread_step (threadref
*ref
, void *context
);
2380 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2381 buffer we're allowed to write to. Returns
2382 BUF+CHARACTERS_WRITTEN. */
2385 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2388 struct remote_state
*rs
= get_remote_state ();
2390 if (remote_multi_process_p (rs
))
2392 pid
= ptid_get_pid (ptid
);
2394 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2396 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2398 tid
= ptid_get_lwp (ptid
);
2400 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2402 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2407 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2408 last parsed char. Returns null_ptid if no thread id is found, and
2409 throws an error if the thread id has an invalid format. */
2412 read_ptid (const char *buf
, const char **obuf
)
2414 const char *p
= buf
;
2416 ULONGEST pid
= 0, tid
= 0;
2420 /* Multi-process ptid. */
2421 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2423 error (_("invalid remote ptid: %s"), p
);
2426 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2429 return ptid_build (pid
, tid
, 0);
2432 /* No multi-process. Just a tid. */
2433 pp
= unpack_varlen_hex (p
, &tid
);
2435 /* Return null_ptid when no thread id is found. */
2443 /* Since the stub is not sending a process id, then default to
2444 what's in inferior_ptid, unless it's null at this point. If so,
2445 then since there's no way to know the pid of the reported
2446 threads, use the magic number. */
2447 if (ptid_equal (inferior_ptid
, null_ptid
))
2448 pid
= ptid_get_pid (magic_null_ptid
);
2450 pid
= ptid_get_pid (inferior_ptid
);
2454 return ptid_build (pid
, tid
, 0);
2460 if (ch
>= 'a' && ch
<= 'f')
2461 return ch
- 'a' + 10;
2462 if (ch
>= '0' && ch
<= '9')
2464 if (ch
>= 'A' && ch
<= 'F')
2465 return ch
- 'A' + 10;
2470 stub_unpack_int (char *buff
, int fieldlength
)
2477 nibble
= stubhex (*buff
++);
2481 retval
= retval
<< 4;
2487 unpack_nibble (char *buf
, int *val
)
2489 *val
= fromhex (*buf
++);
2494 unpack_byte (char *buf
, int *value
)
2496 *value
= stub_unpack_int (buf
, 2);
2501 pack_int (char *buf
, int value
)
2503 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2504 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2505 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2506 buf
= pack_hex_byte (buf
, (value
& 0xff));
2511 unpack_int (char *buf
, int *value
)
2513 *value
= stub_unpack_int (buf
, 8);
2517 #if 0 /* Currently unused, uncomment when needed. */
2518 static char *pack_string (char *pkt
, char *string
);
2521 pack_string (char *pkt
, char *string
)
2526 len
= strlen (string
);
2528 len
= 200; /* Bigger than most GDB packets, junk??? */
2529 pkt
= pack_hex_byte (pkt
, len
);
2533 if ((ch
== '\0') || (ch
== '#'))
2534 ch
= '*'; /* Protect encapsulation. */
2539 #endif /* 0 (unused) */
2542 unpack_string (char *src
, char *dest
, int length
)
2551 pack_threadid (char *pkt
, threadref
*id
)
2554 unsigned char *altid
;
2556 altid
= (unsigned char *) id
;
2557 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2559 pkt
= pack_hex_byte (pkt
, *altid
++);
2565 unpack_threadid (char *inbuf
, threadref
*id
)
2568 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2571 altref
= (char *) id
;
2573 while (inbuf
< limit
)
2575 x
= stubhex (*inbuf
++);
2576 y
= stubhex (*inbuf
++);
2577 *altref
++ = (x
<< 4) | y
;
2582 /* Externally, threadrefs are 64 bits but internally, they are still
2583 ints. This is due to a mismatch of specifications. We would like
2584 to use 64bit thread references internally. This is an adapter
2588 int_to_threadref (threadref
*id
, int value
)
2590 unsigned char *scan
;
2592 scan
= (unsigned char *) id
;
2598 *scan
++ = (value
>> 24) & 0xff;
2599 *scan
++ = (value
>> 16) & 0xff;
2600 *scan
++ = (value
>> 8) & 0xff;
2601 *scan
++ = (value
& 0xff);
2605 threadref_to_int (threadref
*ref
)
2608 unsigned char *scan
;
2614 value
= (value
<< 8) | ((*scan
++) & 0xff);
2619 copy_threadref (threadref
*dest
, threadref
*src
)
2622 unsigned char *csrc
, *cdest
;
2624 csrc
= (unsigned char *) src
;
2625 cdest
= (unsigned char *) dest
;
2632 threadmatch (threadref
*dest
, threadref
*src
)
2634 /* Things are broken right now, so just assume we got a match. */
2636 unsigned char *srcp
, *destp
;
2638 srcp
= (char *) src
;
2639 destp
= (char *) dest
;
2643 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2650 threadid:1, # always request threadid
2657 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2660 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2662 *pkt
++ = 'q'; /* Info Query */
2663 *pkt
++ = 'P'; /* process or thread info */
2664 pkt
= pack_int (pkt
, mode
); /* mode */
2665 pkt
= pack_threadid (pkt
, id
); /* threadid */
2666 *pkt
= '\0'; /* terminate */
2670 /* These values tag the fields in a thread info response packet. */
2671 /* Tagging the fields allows us to request specific fields and to
2672 add more fields as time goes by. */
2674 #define TAG_THREADID 1 /* Echo the thread identifier. */
2675 #define TAG_EXISTS 2 /* Is this process defined enough to
2676 fetch registers and its stack? */
2677 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2678 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2679 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2683 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2684 struct gdb_ext_thread_info
*info
)
2686 struct remote_state
*rs
= get_remote_state ();
2690 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2693 /* info->threadid = 0; FIXME: implement zero_threadref. */
2695 info
->display
[0] = '\0';
2696 info
->shortname
[0] = '\0';
2697 info
->more_display
[0] = '\0';
2699 /* Assume the characters indicating the packet type have been
2701 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2702 pkt
= unpack_threadid (pkt
, &ref
);
2705 warning (_("Incomplete response to threadinfo request."));
2706 if (!threadmatch (&ref
, expectedref
))
2707 { /* This is an answer to a different request. */
2708 warning (_("ERROR RMT Thread info mismatch."));
2711 copy_threadref (&info
->threadid
, &ref
);
2713 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2715 /* Packets are terminated with nulls. */
2716 while ((pkt
< limit
) && mask
&& *pkt
)
2718 pkt
= unpack_int (pkt
, &tag
); /* tag */
2719 pkt
= unpack_byte (pkt
, &length
); /* length */
2720 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2722 warning (_("ERROR RMT: threadinfo tag mismatch."));
2726 if (tag
== TAG_THREADID
)
2730 warning (_("ERROR RMT: length of threadid is not 16."));
2734 pkt
= unpack_threadid (pkt
, &ref
);
2735 mask
= mask
& ~TAG_THREADID
;
2738 if (tag
== TAG_EXISTS
)
2740 info
->active
= stub_unpack_int (pkt
, length
);
2742 mask
= mask
& ~(TAG_EXISTS
);
2745 warning (_("ERROR RMT: 'exists' length too long."));
2751 if (tag
== TAG_THREADNAME
)
2753 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2754 mask
= mask
& ~TAG_THREADNAME
;
2757 if (tag
== TAG_DISPLAY
)
2759 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2760 mask
= mask
& ~TAG_DISPLAY
;
2763 if (tag
== TAG_MOREDISPLAY
)
2765 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2766 mask
= mask
& ~TAG_MOREDISPLAY
;
2769 warning (_("ERROR RMT: unknown thread info tag."));
2770 break; /* Not a tag we know about. */
2776 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2777 struct gdb_ext_thread_info
*info
)
2779 struct remote_state
*rs
= get_remote_state ();
2782 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2784 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2786 if (rs
->buf
[0] == '\0')
2789 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2794 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2797 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2798 threadref
*nextthread
)
2800 *pkt
++ = 'q'; /* info query packet */
2801 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2802 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2803 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2804 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2809 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2812 parse_threadlist_response (char *pkt
, int result_limit
,
2813 threadref
*original_echo
, threadref
*resultlist
,
2816 struct remote_state
*rs
= get_remote_state ();
2818 int count
, resultcount
, done
;
2821 /* Assume the 'q' and 'M chars have been stripped. */
2822 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2823 /* done parse past here */
2824 pkt
= unpack_byte (pkt
, &count
); /* count field */
2825 pkt
= unpack_nibble (pkt
, &done
);
2826 /* The first threadid is the argument threadid. */
2827 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2828 while ((count
-- > 0) && (pkt
< limit
))
2830 pkt
= unpack_threadid (pkt
, resultlist
++);
2831 if (resultcount
++ >= result_limit
)
2839 /* Fetch the next batch of threads from the remote. Returns -1 if the
2840 qL packet is not supported, 0 on error and 1 on success. */
2843 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2844 int *done
, int *result_count
, threadref
*threadlist
)
2846 struct remote_state
*rs
= get_remote_state ();
2849 /* Trancate result limit to be smaller than the packet size. */
2850 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2851 >= get_remote_packet_size ())
2852 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2854 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2856 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2857 if (*rs
->buf
== '\0')
2859 /* Packet not supported. */
2864 parse_threadlist_response (rs
->buf
+ 2, result_limit
,
2865 &rs
->echo_nextthread
, threadlist
, done
);
2867 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
2869 /* FIXME: This is a good reason to drop the packet. */
2870 /* Possably, there is a duplicate response. */
2872 retransmit immediatly - race conditions
2873 retransmit after timeout - yes
2875 wait for packet, then exit
2877 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2878 return 0; /* I choose simply exiting. */
2880 if (*result_count
<= 0)
2884 warning (_("RMT ERROR : failed to get remote thread list."));
2887 return result
; /* break; */
2889 if (*result_count
> result_limit
)
2892 warning (_("RMT ERROR: threadlist response longer than requested."));
2898 /* Fetch the list of remote threads, with the qL packet, and call
2899 STEPFUNCTION for each thread found. Stops iterating and returns 1
2900 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2901 STEPFUNCTION returns false. If the packet is not supported,
2905 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2908 struct remote_state
*rs
= get_remote_state ();
2909 int done
, i
, result_count
;
2917 if (loopcount
++ > looplimit
)
2920 warning (_("Remote fetch threadlist -infinite loop-."));
2923 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
2924 MAXTHREADLISTRESULTS
,
2925 &done
, &result_count
,
2926 rs
->resultthreadlist
);
2929 /* Clear for later iterations. */
2931 /* Setup to resume next batch of thread references, set nextthread. */
2932 if (result_count
>= 1)
2933 copy_threadref (&rs
->nextthread
,
2934 &rs
->resultthreadlist
[result_count
- 1]);
2936 while (result_count
--)
2938 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
2948 /* A thread found on the remote target. */
2952 explicit thread_item (ptid_t ptid_
)
2956 thread_item (thread_item
&&other
) = default;
2957 thread_item
&operator= (thread_item
&&other
) = default;
2959 DISABLE_COPY_AND_ASSIGN (thread_item
);
2961 /* The thread's PTID. */
2964 /* The thread's extra info. */
2967 /* The thread's name. */
2970 /* The core the thread was running on. -1 if not known. */
2973 /* The thread handle associated with the thread. */
2974 gdb::byte_vector thread_handle
;
2977 /* Context passed around to the various methods listing remote
2978 threads. As new threads are found, they're added to the ITEMS
2981 struct threads_listing_context
2983 /* Return true if this object contains an entry for a thread with ptid
2986 bool contains_thread (ptid_t ptid
) const
2988 auto match_ptid
= [&] (const thread_item
&item
)
2990 return item
.ptid
== ptid
;
2993 auto it
= std::find_if (this->items
.begin (),
2997 return it
!= this->items
.end ();
3000 /* Remove the thread with ptid PTID. */
3002 void remove_thread (ptid_t ptid
)
3004 auto match_ptid
= [&] (const thread_item
&item
)
3006 return item
.ptid
== ptid
;
3009 auto it
= std::remove_if (this->items
.begin (),
3013 if (it
!= this->items
.end ())
3014 this->items
.erase (it
);
3017 /* The threads found on the remote target. */
3018 std::vector
<thread_item
> items
;
3022 remote_newthread_step (threadref
*ref
, void *data
)
3024 struct threads_listing_context
*context
3025 = (struct threads_listing_context
*) data
;
3026 int pid
= inferior_ptid
.pid ();
3027 int lwp
= threadref_to_int (ref
);
3028 ptid_t
ptid (pid
, lwp
);
3030 context
->items
.emplace_back (ptid
);
3032 return 1; /* continue iterator */
3035 #define CRAZY_MAX_THREADS 1000
3038 remote_current_thread (ptid_t oldpid
)
3040 struct remote_state
*rs
= get_remote_state ();
3043 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3044 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3049 result
= read_ptid (&rs
->buf
[2], &obuf
);
3050 if (*obuf
!= '\0' && remote_debug
)
3051 fprintf_unfiltered (gdb_stdlog
,
3052 "warning: garbage in qC reply\n");
3060 /* List remote threads using the deprecated qL packet. */
3063 remote_get_threads_with_ql (struct target_ops
*ops
,
3064 struct threads_listing_context
*context
)
3066 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3067 CRAZY_MAX_THREADS
) >= 0)
3073 #if defined(HAVE_LIBEXPAT)
3076 start_thread (struct gdb_xml_parser
*parser
,
3077 const struct gdb_xml_element
*element
,
3079 std::vector
<gdb_xml_value
> &attributes
)
3081 struct threads_listing_context
*data
3082 = (struct threads_listing_context
*) user_data
;
3083 struct gdb_xml_value
*attr
;
3085 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3086 ptid_t ptid
= read_ptid (id
, NULL
);
3088 data
->items
.emplace_back (ptid
);
3089 thread_item
&item
= data
->items
.back ();
3091 attr
= xml_find_attribute (attributes
, "core");
3093 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3095 attr
= xml_find_attribute (attributes
, "name");
3097 item
.name
= (const char *) attr
->value
.get ();
3099 attr
= xml_find_attribute (attributes
, "handle");
3101 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3105 end_thread (struct gdb_xml_parser
*parser
,
3106 const struct gdb_xml_element
*element
,
3107 void *user_data
, const char *body_text
)
3109 struct threads_listing_context
*data
3110 = (struct threads_listing_context
*) user_data
;
3112 if (body_text
!= NULL
&& *body_text
!= '\0')
3113 data
->items
.back ().extra
= body_text
;
3116 const struct gdb_xml_attribute thread_attributes
[] = {
3117 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3118 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3119 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3120 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3121 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3124 const struct gdb_xml_element thread_children
[] = {
3125 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3128 const struct gdb_xml_element threads_children
[] = {
3129 { "thread", thread_attributes
, thread_children
,
3130 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3131 start_thread
, end_thread
},
3132 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3135 const struct gdb_xml_element threads_elements
[] = {
3136 { "threads", NULL
, threads_children
,
3137 GDB_XML_EF_NONE
, NULL
, NULL
},
3138 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3143 /* List remote threads using qXfer:threads:read. */
3146 remote_get_threads_with_qxfer (struct target_ops
*ops
,
3147 struct threads_listing_context
*context
)
3149 #if defined(HAVE_LIBEXPAT)
3150 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3152 gdb::optional
<gdb::char_vector
> xml
3153 = target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3155 if (xml
&& (*xml
)[0] != '\0')
3157 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3158 threads_elements
, xml
->data (), context
);
3168 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3171 remote_get_threads_with_qthreadinfo (struct target_ops
*ops
,
3172 struct threads_listing_context
*context
)
3174 struct remote_state
*rs
= get_remote_state ();
3176 if (rs
->use_threadinfo_query
)
3180 putpkt ("qfThreadInfo");
3181 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3183 if (bufp
[0] != '\0') /* q packet recognized */
3185 while (*bufp
++ == 'm') /* reply contains one or more TID */
3189 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3190 context
->items
.emplace_back (ptid
);
3192 while (*bufp
++ == ','); /* comma-separated list */
3193 putpkt ("qsThreadInfo");
3194 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3201 /* Packet not recognized. */
3202 rs
->use_threadinfo_query
= 0;
3209 /* Implement the to_update_thread_list function for the remote
3213 remote_update_thread_list (struct target_ops
*ops
)
3215 struct threads_listing_context context
;
3218 /* We have a few different mechanisms to fetch the thread list. Try
3219 them all, starting with the most preferred one first, falling
3220 back to older methods. */
3221 if (remote_get_threads_with_qxfer (ops
, &context
)
3222 || remote_get_threads_with_qthreadinfo (ops
, &context
)
3223 || remote_get_threads_with_ql (ops
, &context
))
3225 struct thread_info
*tp
, *tmp
;
3229 if (context
.items
.empty ()
3230 && remote_thread_always_alive (ops
, inferior_ptid
))
3232 /* Some targets don't really support threads, but still
3233 reply an (empty) thread list in response to the thread
3234 listing packets, instead of replying "packet not
3235 supported". Exit early so we don't delete the main
3240 /* CONTEXT now holds the current thread list on the remote
3241 target end. Delete GDB-side threads no longer found on the
3243 ALL_THREADS_SAFE (tp
, tmp
)
3245 if (!context
.contains_thread (tp
->ptid
))
3248 delete_thread (tp
->ptid
);
3252 /* Remove any unreported fork child threads from CONTEXT so
3253 that we don't interfere with follow fork, which is where
3254 creation of such threads is handled. */
3255 remove_new_fork_children (&context
);
3257 /* And now add threads we don't know about yet to our list. */
3258 for (thread_item
&item
: context
.items
)
3260 if (item
.ptid
!= null_ptid
)
3262 /* In non-stop mode, we assume new found threads are
3263 executing until proven otherwise with a stop reply.
3264 In all-stop, we can only get here if all threads are
3266 int executing
= target_is_non_stop_p () ? 1 : 0;
3268 remote_notice_new_inferior (item
.ptid
, executing
);
3270 remote_thread_info
*info
= get_remote_thread_info (item
.ptid
);
3271 info
->core
= item
.core
;
3272 info
->extra
= std::move (item
.extra
);
3273 info
->name
= std::move (item
.name
);
3274 info
->thread_handle
= std::move (item
.thread_handle
);
3281 /* If no thread listing method is supported, then query whether
3282 each known thread is alive, one by one, with the T packet.
3283 If the target doesn't support threads at all, then this is a
3284 no-op. See remote_thread_alive. */
3290 * Collect a descriptive string about the given thread.
3291 * The target may say anything it wants to about the thread
3292 * (typically info about its blocked / runnable state, name, etc.).
3293 * This string will appear in the info threads display.
3295 * Optional: targets are not required to implement this function.
3299 remote_threads_extra_info (struct target_ops
*self
, struct thread_info
*tp
)
3301 struct remote_state
*rs
= get_remote_state ();
3305 struct gdb_ext_thread_info threadinfo
;
3306 static char display_buf
[100]; /* arbitrary... */
3307 int n
= 0; /* position in display_buf */
3309 if (rs
->remote_desc
== 0) /* paranoia */
3310 internal_error (__FILE__
, __LINE__
,
3311 _("remote_threads_extra_info"));
3313 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
3314 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_lwp (tp
->ptid
) == 0))
3315 /* This is the main thread which was added by GDB. The remote
3316 server doesn't know about it. */
3319 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3321 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
3323 if (info
!= NULL
&& info
->priv
!= NULL
)
3325 const std::string
&extra
= get_remote_thread_info (info
)->extra
;
3326 return !extra
.empty () ? extra
.c_str () : NULL
;
3332 if (rs
->use_threadextra_query
)
3335 char *endb
= rs
->buf
+ get_remote_packet_size ();
3337 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3339 write_ptid (b
, endb
, tp
->ptid
);
3342 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3343 if (rs
->buf
[0] != 0)
3345 n
= std::min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
3346 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
3347 display_buf
[result
] = '\0';
3352 /* If the above query fails, fall back to the old method. */
3353 rs
->use_threadextra_query
= 0;
3354 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3355 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3356 int_to_threadref (&id
, ptid_get_lwp (tp
->ptid
));
3357 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3358 if (threadinfo
.active
)
3360 if (*threadinfo
.shortname
)
3361 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
3362 " Name: %s,", threadinfo
.shortname
);
3363 if (*threadinfo
.display
)
3364 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3365 " State: %s,", threadinfo
.display
);
3366 if (*threadinfo
.more_display
)
3367 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3368 " Priority: %s", threadinfo
.more_display
);
3372 /* For purely cosmetic reasons, clear up trailing commas. */
3373 if (',' == display_buf
[n
-1])
3374 display_buf
[n
-1] = ' ';
3383 remote_static_tracepoint_marker_at (struct target_ops
*self
, CORE_ADDR addr
,
3384 struct static_tracepoint_marker
*marker
)
3386 struct remote_state
*rs
= get_remote_state ();
3389 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3391 p
+= hexnumstr (p
, addr
);
3393 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3397 error (_("Remote failure reply: %s"), p
);
3401 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
3408 static std::vector
<static_tracepoint_marker
>
3409 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3412 struct remote_state
*rs
= get_remote_state ();
3413 std::vector
<static_tracepoint_marker
> markers
;
3415 static_tracepoint_marker marker
;
3417 /* Ask for a first packet of static tracepoint marker
3420 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3423 error (_("Remote failure reply: %s"), p
);
3429 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
3431 if (strid
== NULL
|| marker
.str_id
== strid
)
3432 markers
.push_back (std::move (marker
));
3434 while (*p
++ == ','); /* comma-separated list */
3435 /* Ask for another packet of static tracepoint definition. */
3437 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3445 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3448 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3450 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3454 /* Restart the remote side; this is an extended protocol operation. */
3457 extended_remote_restart (void)
3459 struct remote_state
*rs
= get_remote_state ();
3461 /* Send the restart command; for reasons I don't understand the
3462 remote side really expects a number after the "R". */
3463 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3466 remote_fileio_reset ();
3469 /* Clean up connection to a remote debugger. */
3472 remote_close (struct target_ops
*self
)
3474 struct remote_state
*rs
= get_remote_state ();
3476 if (rs
->remote_desc
== NULL
)
3477 return; /* already closed */
3479 /* Make sure we leave stdin registered in the event loop. */
3480 remote_terminal_ours (self
);
3482 serial_close (rs
->remote_desc
);
3483 rs
->remote_desc
= NULL
;
3485 /* We don't have a connection to the remote stub anymore. Get rid
3486 of all the inferiors and their threads we were controlling.
3487 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3488 will be unable to find the thread corresponding to (pid, 0, 0). */
3489 inferior_ptid
= null_ptid
;
3490 discard_all_inferiors ();
3492 /* We are closing the remote target, so we should discard
3493 everything of this target. */
3494 discard_pending_stop_replies_in_queue (rs
);
3496 if (remote_async_inferior_event_token
)
3497 delete_async_event_handler (&remote_async_inferior_event_token
);
3499 remote_notif_state_xfree (rs
->notif_state
);
3501 trace_reset_local_state ();
3504 /* Query the remote side for the text, data and bss offsets. */
3509 struct remote_state
*rs
= get_remote_state ();
3512 int lose
, num_segments
= 0, do_sections
, do_segments
;
3513 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3514 struct section_offsets
*offs
;
3515 struct symfile_segment_data
*data
;
3517 if (symfile_objfile
== NULL
)
3520 putpkt ("qOffsets");
3521 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3524 if (buf
[0] == '\000')
3525 return; /* Return silently. Stub doesn't support
3529 warning (_("Remote failure reply: %s"), buf
);
3533 /* Pick up each field in turn. This used to be done with scanf, but
3534 scanf will make trouble if CORE_ADDR size doesn't match
3535 conversion directives correctly. The following code will work
3536 with any size of CORE_ADDR. */
3537 text_addr
= data_addr
= bss_addr
= 0;
3541 if (startswith (ptr
, "Text="))
3544 /* Don't use strtol, could lose on big values. */
3545 while (*ptr
&& *ptr
!= ';')
3546 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3548 if (startswith (ptr
, ";Data="))
3551 while (*ptr
&& *ptr
!= ';')
3552 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3557 if (!lose
&& startswith (ptr
, ";Bss="))
3560 while (*ptr
&& *ptr
!= ';')
3561 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3563 if (bss_addr
!= data_addr
)
3564 warning (_("Target reported unsupported offsets: %s"), buf
);
3569 else if (startswith (ptr
, "TextSeg="))
3572 /* Don't use strtol, could lose on big values. */
3573 while (*ptr
&& *ptr
!= ';')
3574 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3577 if (startswith (ptr
, ";DataSeg="))
3580 while (*ptr
&& *ptr
!= ';')
3581 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3589 error (_("Malformed response to offset query, %s"), buf
);
3590 else if (*ptr
!= '\0')
3591 warning (_("Target reported unsupported offsets: %s"), buf
);
3593 offs
= ((struct section_offsets
*)
3594 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3595 memcpy (offs
, symfile_objfile
->section_offsets
,
3596 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3598 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3599 do_segments
= (data
!= NULL
);
3600 do_sections
= num_segments
== 0;
3602 if (num_segments
> 0)
3604 segments
[0] = text_addr
;
3605 segments
[1] = data_addr
;
3607 /* If we have two segments, we can still try to relocate everything
3608 by assuming that the .text and .data offsets apply to the whole
3609 text and data segments. Convert the offsets given in the packet
3610 to base addresses for symfile_map_offsets_to_segments. */
3611 else if (data
&& data
->num_segments
== 2)
3613 segments
[0] = data
->segment_bases
[0] + text_addr
;
3614 segments
[1] = data
->segment_bases
[1] + data_addr
;
3617 /* If the object file has only one segment, assume that it is text
3618 rather than data; main programs with no writable data are rare,
3619 but programs with no code are useless. Of course the code might
3620 have ended up in the data segment... to detect that we would need
3621 the permissions here. */
3622 else if (data
&& data
->num_segments
== 1)
3624 segments
[0] = data
->segment_bases
[0] + text_addr
;
3627 /* There's no way to relocate by segment. */
3633 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3634 offs
, num_segments
, segments
);
3636 if (ret
== 0 && !do_sections
)
3637 error (_("Can not handle qOffsets TextSeg "
3638 "response with this symbol file"));
3645 free_symfile_segment_data (data
);
3649 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3651 /* This is a temporary kludge to force data and bss to use the
3652 same offsets because that's what nlmconv does now. The real
3653 solution requires changes to the stub and remote.c that I
3654 don't have time to do right now. */
3656 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3657 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3660 objfile_relocate (symfile_objfile
, offs
);
3663 /* Send interrupt_sequence to remote target. */
3665 send_interrupt_sequence (void)
3667 struct remote_state
*rs
= get_remote_state ();
3669 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3670 remote_serial_write ("\x03", 1);
3671 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3672 serial_send_break (rs
->remote_desc
);
3673 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3675 serial_send_break (rs
->remote_desc
);
3676 remote_serial_write ("g", 1);
3679 internal_error (__FILE__
, __LINE__
,
3680 _("Invalid value for interrupt_sequence_mode: %s."),
3681 interrupt_sequence_mode
);
3685 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3686 and extract the PTID. Returns NULL_PTID if not found. */
3689 stop_reply_extract_thread (char *stop_reply
)
3691 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3695 /* Txx r:val ; r:val (...) */
3698 /* Look for "register" named "thread". */
3703 p1
= strchr (p
, ':');
3707 if (strncmp (p
, "thread", p1
- p
) == 0)
3708 return read_ptid (++p1
, &p
);
3710 p1
= strchr (p
, ';');
3722 /* Determine the remote side's current thread. If we have a stop
3723 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3724 "thread" register we can extract the current thread from. If not,
3725 ask the remote which is the current thread with qC. The former
3726 method avoids a roundtrip. */
3729 get_current_thread (char *wait_status
)
3731 ptid_t ptid
= null_ptid
;
3733 /* Note we don't use remote_parse_stop_reply as that makes use of
3734 the target architecture, which we haven't yet fully determined at
3736 if (wait_status
!= NULL
)
3737 ptid
= stop_reply_extract_thread (wait_status
);
3738 if (ptid_equal (ptid
, null_ptid
))
3739 ptid
= remote_current_thread (inferior_ptid
);
3744 /* Query the remote target for which is the current thread/process,
3745 add it to our tables, and update INFERIOR_PTID. The caller is
3746 responsible for setting the state such that the remote end is ready
3747 to return the current thread.
3749 This function is called after handling the '?' or 'vRun' packets,
3750 whose response is a stop reply from which we can also try
3751 extracting the thread. If the target doesn't support the explicit
3752 qC query, we infer the current thread from that stop reply, passed
3753 in in WAIT_STATUS, which may be NULL. */
3756 add_current_inferior_and_thread (char *wait_status
)
3758 struct remote_state
*rs
= get_remote_state ();
3761 inferior_ptid
= null_ptid
;
3763 /* Now, if we have thread information, update inferior_ptid. */
3764 ptid_t curr_ptid
= get_current_thread (wait_status
);
3766 if (curr_ptid
!= null_ptid
)
3768 if (!remote_multi_process_p (rs
))
3773 /* Without this, some commands which require an active target
3774 (such as kill) won't work. This variable serves (at least)
3775 double duty as both the pid of the target process (if it has
3776 such), and as a flag indicating that a target is active. */
3777 curr_ptid
= magic_null_ptid
;
3781 remote_add_inferior (fake_pid_p
, ptid_get_pid (curr_ptid
), -1, 1);
3783 /* Add the main thread and switch to it. Don't try reading
3784 registers yet, since we haven't fetched the target description
3786 thread_info
*tp
= add_thread_silent (curr_ptid
);
3787 switch_to_thread_no_regs (tp
);
3790 /* Print info about a thread that was found already stopped on
3794 print_one_stopped_thread (struct thread_info
*thread
)
3796 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
3798 switch_to_thread (thread
->ptid
);
3799 stop_pc
= get_frame_pc (get_current_frame ());
3800 set_current_sal_from_frame (get_current_frame ());
3802 thread
->suspend
.waitstatus_pending_p
= 0;
3804 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
3806 enum gdb_signal sig
= ws
->value
.sig
;
3808 if (signal_print_state (sig
))
3809 gdb::observers::signal_received
.notify (sig
);
3811 gdb::observers::normal_stop
.notify (NULL
, 1);
3814 /* Process all initial stop replies the remote side sent in response
3815 to the ? packet. These indicate threads that were already stopped
3816 on initial connection. We mark these threads as stopped and print
3817 their current frame before giving the user the prompt. */
3820 process_initial_stop_replies (int from_tty
)
3822 int pending_stop_replies
= stop_reply_queue_length ();
3823 struct inferior
*inf
;
3824 struct thread_info
*thread
;
3825 struct thread_info
*selected
= NULL
;
3826 struct thread_info
*lowest_stopped
= NULL
;
3827 struct thread_info
*first
= NULL
;
3829 /* Consume the initial pending events. */
3830 while (pending_stop_replies
-- > 0)
3832 ptid_t waiton_ptid
= minus_one_ptid
;
3834 struct target_waitstatus ws
;
3835 int ignore_event
= 0;
3836 struct thread_info
*thread
;
3838 memset (&ws
, 0, sizeof (ws
));
3839 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3841 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3845 case TARGET_WAITKIND_IGNORE
:
3846 case TARGET_WAITKIND_NO_RESUMED
:
3847 case TARGET_WAITKIND_SIGNALLED
:
3848 case TARGET_WAITKIND_EXITED
:
3849 /* We shouldn't see these, but if we do, just ignore. */
3851 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3855 case TARGET_WAITKIND_EXECD
:
3856 xfree (ws
.value
.execd_pathname
);
3865 thread
= find_thread_ptid (event_ptid
);
3867 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3869 enum gdb_signal sig
= ws
.value
.sig
;
3871 /* Stubs traditionally report SIGTRAP as initial signal,
3872 instead of signal 0. Suppress it. */
3873 if (sig
== GDB_SIGNAL_TRAP
)
3875 thread
->suspend
.stop_signal
= sig
;
3879 thread
->suspend
.waitstatus
= ws
;
3881 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
3882 || ws
.value
.sig
!= GDB_SIGNAL_0
)
3883 thread
->suspend
.waitstatus_pending_p
= 1;
3885 set_executing (event_ptid
, 0);
3886 set_running (event_ptid
, 0);
3887 get_remote_thread_info (thread
)->vcont_resumed
= 0;
3890 /* "Notice" the new inferiors before anything related to
3891 registers/memory. */
3897 inf
->needs_setup
= 1;
3901 thread
= any_live_thread_of_process (inf
->pid
);
3902 notice_new_inferior (thread
->ptid
,
3903 thread
->state
== THREAD_RUNNING
,
3908 /* If all-stop on top of non-stop, pause all threads. Note this
3909 records the threads' stop pc, so must be done after "noticing"
3913 stop_all_threads ();
3915 /* If all threads of an inferior were already stopped, we
3916 haven't setup the inferior yet. */
3922 if (inf
->needs_setup
)
3924 thread
= any_live_thread_of_process (inf
->pid
);
3925 switch_to_thread_no_regs (thread
);
3931 /* Now go over all threads that are stopped, and print their current
3932 frame. If all-stop, then if there's a signalled thread, pick
3934 ALL_NON_EXITED_THREADS (thread
)
3940 set_running (thread
->ptid
, 0);
3941 else if (thread
->state
!= THREAD_STOPPED
)
3944 if (selected
== NULL
3945 && thread
->suspend
.waitstatus_pending_p
)
3948 if (lowest_stopped
== NULL
3949 || thread
->inf
->num
< lowest_stopped
->inf
->num
3950 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
3951 lowest_stopped
= thread
;
3954 print_one_stopped_thread (thread
);
3957 /* In all-stop, we only print the status of one thread, and leave
3958 others with their status pending. */
3963 thread
= lowest_stopped
;
3967 print_one_stopped_thread (thread
);
3970 /* For "info program". */
3971 thread
= inferior_thread ();
3972 if (thread
->state
== THREAD_STOPPED
)
3973 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
3976 /* Start the remote connection and sync state. */
3979 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
3981 struct remote_state
*rs
= get_remote_state ();
3982 struct packet_config
*noack_config
;
3983 char *wait_status
= NULL
;
3985 /* Signal other parts that we're going through the initial setup,
3986 and so things may not be stable yet. E.g., we don't try to
3987 install tracepoints until we've relocated symbols. Also, a
3988 Ctrl-C before we're connected and synced up can't interrupt the
3989 target. Instead, it offers to drop the (potentially wedged)
3991 rs
->starting_up
= 1;
3995 if (interrupt_on_connect
)
3996 send_interrupt_sequence ();
3998 /* Ack any packet which the remote side has already sent. */
3999 remote_serial_write ("+", 1);
4001 /* The first packet we send to the target is the optional "supported
4002 packets" request. If the target can answer this, it will tell us
4003 which later probes to skip. */
4004 remote_query_supported ();
4006 /* If the stub wants to get a QAllow, compose one and send it. */
4007 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4008 remote_set_permissions (target
);
4010 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4011 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4012 as a reply to known packet. For packet "vFile:setfs:" it is an
4013 invalid reply and GDB would return error in
4014 remote_hostio_set_filesystem, making remote files access impossible.
4015 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4016 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4018 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4020 putpkt (v_mustreplyempty
);
4021 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4022 if (strcmp (rs
->buf
, "OK") == 0)
4023 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4024 else if (strcmp (rs
->buf
, "") != 0)
4025 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4029 /* Next, we possibly activate noack mode.
4031 If the QStartNoAckMode packet configuration is set to AUTO,
4032 enable noack mode if the stub reported a wish for it with
4035 If set to TRUE, then enable noack mode even if the stub didn't
4036 report it in qSupported. If the stub doesn't reply OK, the
4037 session ends with an error.
4039 If FALSE, then don't activate noack mode, regardless of what the
4040 stub claimed should be the default with qSupported. */
4042 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4043 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4045 putpkt ("QStartNoAckMode");
4046 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4047 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4053 /* Tell the remote that we are using the extended protocol. */
4055 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4058 /* Let the target know which signals it is allowed to pass down to
4060 update_signals_program_target ();
4062 /* Next, if the target can specify a description, read it. We do
4063 this before anything involving memory or registers. */
4064 target_find_description ();
4066 /* Next, now that we know something about the target, update the
4067 address spaces in the program spaces. */
4068 update_address_spaces ();
4070 /* On OSs where the list of libraries is global to all
4071 processes, we fetch them early. */
4072 if (gdbarch_has_global_solist (target_gdbarch ()))
4073 solib_add (NULL
, from_tty
, auto_solib_add
);
4075 if (target_is_non_stop_p ())
4077 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4078 error (_("Non-stop mode requested, but remote "
4079 "does not support non-stop"));
4081 putpkt ("QNonStop:1");
4082 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4084 if (strcmp (rs
->buf
, "OK") != 0)
4085 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4087 /* Find about threads and processes the stub is already
4088 controlling. We default to adding them in the running state.
4089 The '?' query below will then tell us about which threads are
4091 remote_update_thread_list (target
);
4093 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4095 /* Don't assume that the stub can operate in all-stop mode.
4096 Request it explicitly. */
4097 putpkt ("QNonStop:0");
4098 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4100 if (strcmp (rs
->buf
, "OK") != 0)
4101 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4104 /* Upload TSVs regardless of whether the target is running or not. The
4105 remote stub, such as GDBserver, may have some predefined or builtin
4106 TSVs, even if the target is not running. */
4107 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4109 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4111 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
4112 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4115 /* Check whether the target is running now. */
4117 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4119 if (!target_is_non_stop_p ())
4121 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4124 error (_("The target is not running (try extended-remote?)"));
4126 /* We're connected, but not running. Drop out before we
4127 call start_remote. */
4128 rs
->starting_up
= 0;
4133 /* Save the reply for later. */
4134 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4135 strcpy (wait_status
, rs
->buf
);
4138 /* Fetch thread list. */
4139 target_update_thread_list ();
4141 /* Let the stub know that we want it to return the thread. */
4142 set_continue_thread (minus_one_ptid
);
4144 if (thread_count () == 0)
4146 /* Target has no concept of threads at all. GDB treats
4147 non-threaded target as single-threaded; add a main
4149 add_current_inferior_and_thread (wait_status
);
4153 /* We have thread information; select the thread the target
4154 says should be current. If we're reconnecting to a
4155 multi-threaded program, this will ideally be the thread
4156 that last reported an event before GDB disconnected. */
4157 inferior_ptid
= get_current_thread (wait_status
);
4158 if (ptid_equal (inferior_ptid
, null_ptid
))
4160 /* Odd... The target was able to list threads, but not
4161 tell us which thread was current (no "thread"
4162 register in T stop reply?). Just pick the first
4163 thread in the thread list then. */
4166 fprintf_unfiltered (gdb_stdlog
,
4167 "warning: couldn't determine remote "
4168 "current thread; picking first in list.\n");
4170 inferior_ptid
= thread_list
->ptid
;
4174 /* init_wait_for_inferior should be called before get_offsets in order
4175 to manage `inserted' flag in bp loc in a correct state.
4176 breakpoint_init_inferior, called from init_wait_for_inferior, set
4177 `inserted' flag to 0, while before breakpoint_re_set, called from
4178 start_remote, set `inserted' flag to 1. In the initialization of
4179 inferior, breakpoint_init_inferior should be called first, and then
4180 breakpoint_re_set can be called. If this order is broken, state of
4181 `inserted' flag is wrong, and cause some problems on breakpoint
4183 init_wait_for_inferior ();
4185 get_offsets (); /* Get text, data & bss offsets. */
4187 /* If we could not find a description using qXfer, and we know
4188 how to do it some other way, try again. This is not
4189 supported for non-stop; it could be, but it is tricky if
4190 there are no stopped threads when we connect. */
4191 if (remote_read_description_p (target
)
4192 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4194 target_clear_description ();
4195 target_find_description ();
4198 /* Use the previously fetched status. */
4199 gdb_assert (wait_status
!= NULL
);
4200 strcpy (rs
->buf
, wait_status
);
4201 rs
->cached_wait_status
= 1;
4203 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4207 /* Clear WFI global state. Do this before finding about new
4208 threads and inferiors, and setting the current inferior.
4209 Otherwise we would clear the proceed status of the current
4210 inferior when we want its stop_soon state to be preserved
4211 (see notice_new_inferior). */
4212 init_wait_for_inferior ();
4214 /* In non-stop, we will either get an "OK", meaning that there
4215 are no stopped threads at this time; or, a regular stop
4216 reply. In the latter case, there may be more than one thread
4217 stopped --- we pull them all out using the vStopped
4219 if (strcmp (rs
->buf
, "OK") != 0)
4221 struct notif_client
*notif
= ¬if_client_stop
;
4223 /* remote_notif_get_pending_replies acks this one, and gets
4225 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4226 = remote_notif_parse (notif
, rs
->buf
);
4227 remote_notif_get_pending_events (notif
);
4230 if (thread_count () == 0)
4233 error (_("The target is not running (try extended-remote?)"));
4235 /* We're connected, but not running. Drop out before we
4236 call start_remote. */
4237 rs
->starting_up
= 0;
4241 /* In non-stop mode, any cached wait status will be stored in
4242 the stop reply queue. */
4243 gdb_assert (wait_status
== NULL
);
4245 /* Report all signals during attach/startup. */
4246 remote_pass_signals (target
, 0, NULL
);
4248 /* If there are already stopped threads, mark them stopped and
4249 report their stops before giving the prompt to the user. */
4250 process_initial_stop_replies (from_tty
);
4252 if (target_can_async_p ())
4256 /* If we connected to a live target, do some additional setup. */
4257 if (target_has_execution
)
4259 if (symfile_objfile
) /* No use without a symbol-file. */
4260 remote_check_symbols ();
4263 /* Possibly the target has been engaged in a trace run started
4264 previously; find out where things are at. */
4265 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4267 struct uploaded_tp
*uploaded_tps
= NULL
;
4269 if (current_trace_status ()->running
)
4270 printf_filtered (_("Trace is already running on the target.\n"));
4272 remote_upload_tracepoints (target
, &uploaded_tps
);
4274 merge_uploaded_tracepoints (&uploaded_tps
);
4277 /* Possibly the target has been engaged in a btrace record started
4278 previously; find out where things are at. */
4279 remote_btrace_maybe_reopen ();
4281 /* The thread and inferior lists are now synchronized with the
4282 target, our symbols have been relocated, and we're merged the
4283 target's tracepoints with ours. We're done with basic start
4285 rs
->starting_up
= 0;
4287 /* Maybe breakpoints are global and need to be inserted now. */
4288 if (breakpoints_should_be_inserted_now ())
4289 insert_breakpoints ();
4292 /* Open a connection to a remote debugger.
4293 NAME is the filename used for communication. */
4296 remote_open (const char *name
, int from_tty
)
4298 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4301 /* Open a connection to a remote debugger using the extended
4302 remote gdb protocol. NAME is the filename used for communication. */
4305 extended_remote_open (const char *name
, int from_tty
)
4307 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4310 /* Reset all packets back to "unknown support". Called when opening a
4311 new connection to a remote target. */
4314 reset_all_packet_configs_support (void)
4318 for (i
= 0; i
< PACKET_MAX
; i
++)
4319 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4322 /* Initialize all packet configs. */
4325 init_all_packet_configs (void)
4329 for (i
= 0; i
< PACKET_MAX
; i
++)
4331 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4332 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4336 /* Symbol look-up. */
4339 remote_check_symbols (void)
4341 char *msg
, *reply
, *tmp
;
4344 struct cleanup
*old_chain
;
4346 /* The remote side has no concept of inferiors that aren't running
4347 yet, it only knows about running processes. If we're connected
4348 but our current inferior is not running, we should not invite the
4349 remote target to request symbol lookups related to its
4350 (unrelated) current process. */
4351 if (!target_has_execution
)
4354 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4357 /* Make sure the remote is pointing at the right process. Note
4358 there's no way to select "no process". */
4359 set_general_process ();
4361 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4362 because we need both at the same time. */
4363 msg
= (char *) xmalloc (get_remote_packet_size ());
4364 old_chain
= make_cleanup (xfree
, msg
);
4365 reply
= (char *) xmalloc (get_remote_packet_size ());
4366 make_cleanup (free_current_contents
, &reply
);
4367 reply_size
= get_remote_packet_size ();
4369 /* Invite target to request symbol lookups. */
4371 putpkt ("qSymbol::");
4372 getpkt (&reply
, &reply_size
, 0);
4373 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4375 while (startswith (reply
, "qSymbol:"))
4377 struct bound_minimal_symbol sym
;
4380 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4382 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4383 if (sym
.minsym
== NULL
)
4384 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4387 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4388 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4390 /* If this is a function address, return the start of code
4391 instead of any data function descriptor. */
4392 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4396 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4397 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4401 getpkt (&reply
, &reply_size
, 0);
4404 do_cleanups (old_chain
);
4407 static struct serial
*
4408 remote_serial_open (const char *name
)
4410 static int udp_warning
= 0;
4412 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4413 of in ser-tcp.c, because it is the remote protocol assuming that the
4414 serial connection is reliable and not the serial connection promising
4416 if (!udp_warning
&& startswith (name
, "udp:"))
4418 warning (_("The remote protocol may be unreliable over UDP.\n"
4419 "Some events may be lost, rendering further debugging "
4424 return serial_open (name
);
4427 /* Inform the target of our permission settings. The permission flags
4428 work without this, but if the target knows the settings, it can do
4429 a couple things. First, it can add its own check, to catch cases
4430 that somehow manage to get by the permissions checks in target
4431 methods. Second, if the target is wired to disallow particular
4432 settings (for instance, a system in the field that is not set up to
4433 be able to stop at a breakpoint), it can object to any unavailable
4437 remote_set_permissions (struct target_ops
*self
)
4439 struct remote_state
*rs
= get_remote_state ();
4441 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4442 "WriteReg:%x;WriteMem:%x;"
4443 "InsertBreak:%x;InsertTrace:%x;"
4444 "InsertFastTrace:%x;Stop:%x",
4445 may_write_registers
, may_write_memory
,
4446 may_insert_breakpoints
, may_insert_tracepoints
,
4447 may_insert_fast_tracepoints
, may_stop
);
4449 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4451 /* If the target didn't like the packet, warn the user. Do not try
4452 to undo the user's settings, that would just be maddening. */
4453 if (strcmp (rs
->buf
, "OK") != 0)
4454 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4457 /* This type describes each known response to the qSupported
4459 struct protocol_feature
4461 /* The name of this protocol feature. */
4464 /* The default for this protocol feature. */
4465 enum packet_support default_support
;
4467 /* The function to call when this feature is reported, or after
4468 qSupported processing if the feature is not supported.
4469 The first argument points to this structure. The second
4470 argument indicates whether the packet requested support be
4471 enabled, disabled, or probed (or the default, if this function
4472 is being called at the end of processing and this feature was
4473 not reported). The third argument may be NULL; if not NULL, it
4474 is a NUL-terminated string taken from the packet following
4475 this feature's name and an equals sign. */
4476 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4479 /* The corresponding packet for this feature. Only used if
4480 FUNC is remote_supported_packet. */
4485 remote_supported_packet (const struct protocol_feature
*feature
,
4486 enum packet_support support
,
4487 const char *argument
)
4491 warning (_("Remote qSupported response supplied an unexpected value for"
4492 " \"%s\"."), feature
->name
);
4496 remote_protocol_packets
[feature
->packet
].support
= support
;
4500 remote_packet_size (const struct protocol_feature
*feature
,
4501 enum packet_support support
, const char *value
)
4503 struct remote_state
*rs
= get_remote_state ();
4508 if (support
!= PACKET_ENABLE
)
4511 if (value
== NULL
|| *value
== '\0')
4513 warning (_("Remote target reported \"%s\" without a size."),
4519 packet_size
= strtol (value
, &value_end
, 16);
4520 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4522 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4523 feature
->name
, value
);
4527 /* Record the new maximum packet size. */
4528 rs
->explicit_packet_size
= packet_size
;
4531 static const struct protocol_feature remote_protocol_features
[] = {
4532 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4533 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4534 PACKET_qXfer_auxv
},
4535 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4536 PACKET_qXfer_exec_file
},
4537 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4538 PACKET_qXfer_features
},
4539 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4540 PACKET_qXfer_libraries
},
4541 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4542 PACKET_qXfer_libraries_svr4
},
4543 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4544 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4545 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4546 PACKET_qXfer_memory_map
},
4547 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4548 PACKET_qXfer_spu_read
},
4549 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4550 PACKET_qXfer_spu_write
},
4551 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4552 PACKET_qXfer_osdata
},
4553 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4554 PACKET_qXfer_threads
},
4555 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4556 PACKET_qXfer_traceframe_info
},
4557 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4558 PACKET_QPassSignals
},
4559 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
4560 PACKET_QCatchSyscalls
},
4561 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4562 PACKET_QProgramSignals
},
4563 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
4564 PACKET_QSetWorkingDir
},
4565 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
4566 PACKET_QStartupWithShell
},
4567 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
4568 PACKET_QEnvironmentHexEncoded
},
4569 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
4570 PACKET_QEnvironmentReset
},
4571 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
4572 PACKET_QEnvironmentUnset
},
4573 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4574 PACKET_QStartNoAckMode
},
4575 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4576 PACKET_multiprocess_feature
},
4577 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4578 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4579 PACKET_qXfer_siginfo_read
},
4580 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4581 PACKET_qXfer_siginfo_write
},
4582 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4583 PACKET_ConditionalTracepoints
},
4584 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4585 PACKET_ConditionalBreakpoints
},
4586 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4587 PACKET_BreakpointCommands
},
4588 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4589 PACKET_FastTracepoints
},
4590 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4591 PACKET_StaticTracepoints
},
4592 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4593 PACKET_InstallInTrace
},
4594 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4595 PACKET_DisconnectedTracing_feature
},
4596 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4598 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4600 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4601 PACKET_TracepointSource
},
4602 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4604 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4605 PACKET_EnableDisableTracepoints_feature
},
4606 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4607 PACKET_qXfer_fdpic
},
4608 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4610 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4611 PACKET_QDisableRandomization
},
4612 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4613 { "QTBuffer:size", PACKET_DISABLE
,
4614 remote_supported_packet
, PACKET_QTBuffer_size
},
4615 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4616 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4617 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4618 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4619 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4620 PACKET_qXfer_btrace
},
4621 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4622 PACKET_qXfer_btrace_conf
},
4623 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4624 PACKET_Qbtrace_conf_bts_size
},
4625 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4626 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4627 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4628 PACKET_fork_event_feature
},
4629 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4630 PACKET_vfork_event_feature
},
4631 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4632 PACKET_exec_event_feature
},
4633 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4634 PACKET_Qbtrace_conf_pt_size
},
4635 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
4636 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
4637 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
4640 static char *remote_support_xml
;
4642 /* Register string appended to "xmlRegisters=" in qSupported query. */
4645 register_remote_support_xml (const char *xml
)
4647 #if defined(HAVE_LIBEXPAT)
4648 if (remote_support_xml
== NULL
)
4649 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4652 char *copy
= xstrdup (remote_support_xml
+ 13);
4653 char *p
= strtok (copy
, ",");
4657 if (strcmp (p
, xml
) == 0)
4664 while ((p
= strtok (NULL
, ",")) != NULL
);
4667 remote_support_xml
= reconcat (remote_support_xml
,
4668 remote_support_xml
, ",", xml
,
4675 remote_query_supported_append (char *msg
, const char *append
)
4678 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4680 return xstrdup (append
);
4684 remote_query_supported (void)
4686 struct remote_state
*rs
= get_remote_state ();
4689 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4691 /* The packet support flags are handled differently for this packet
4692 than for most others. We treat an error, a disabled packet, and
4693 an empty response identically: any features which must be reported
4694 to be used will be automatically disabled. An empty buffer
4695 accomplishes this, since that is also the representation for a list
4696 containing no features. */
4699 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4702 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4704 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4705 q
= remote_query_supported_append (q
, "multiprocess+");
4707 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4708 q
= remote_query_supported_append (q
, "swbreak+");
4709 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4710 q
= remote_query_supported_append (q
, "hwbreak+");
4712 q
= remote_query_supported_append (q
, "qRelocInsn+");
4714 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4715 != AUTO_BOOLEAN_FALSE
)
4716 q
= remote_query_supported_append (q
, "fork-events+");
4717 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4718 != AUTO_BOOLEAN_FALSE
)
4719 q
= remote_query_supported_append (q
, "vfork-events+");
4720 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4721 != AUTO_BOOLEAN_FALSE
)
4722 q
= remote_query_supported_append (q
, "exec-events+");
4724 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4725 q
= remote_query_supported_append (q
, "vContSupported+");
4727 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
4728 q
= remote_query_supported_append (q
, "QThreadEvents+");
4730 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
4731 q
= remote_query_supported_append (q
, "no-resumed+");
4733 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4734 the qSupported:xmlRegisters=i386 handling. */
4735 if (remote_support_xml
!= NULL
4736 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
4737 q
= remote_query_supported_append (q
, remote_support_xml
);
4739 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4742 do_cleanups (old_chain
);
4744 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4746 /* If an error occured, warn, but do not return - just reset the
4747 buffer to empty and go on to disable features. */
4748 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4751 warning (_("Remote failure reply: %s"), rs
->buf
);
4756 memset (seen
, 0, sizeof (seen
));
4761 enum packet_support is_supported
;
4762 char *p
, *end
, *name_end
, *value
;
4764 /* First separate out this item from the rest of the packet. If
4765 there's another item after this, we overwrite the separator
4766 (terminated strings are much easier to work with). */
4768 end
= strchr (p
, ';');
4771 end
= p
+ strlen (p
);
4781 warning (_("empty item in \"qSupported\" response"));
4786 name_end
= strchr (p
, '=');
4789 /* This is a name=value entry. */
4790 is_supported
= PACKET_ENABLE
;
4791 value
= name_end
+ 1;
4800 is_supported
= PACKET_ENABLE
;
4804 is_supported
= PACKET_DISABLE
;
4808 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4812 warning (_("unrecognized item \"%s\" "
4813 "in \"qSupported\" response"), p
);
4819 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4820 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4822 const struct protocol_feature
*feature
;
4825 feature
= &remote_protocol_features
[i
];
4826 feature
->func (feature
, is_supported
, value
);
4831 /* If we increased the packet size, make sure to increase the global
4832 buffer size also. We delay this until after parsing the entire
4833 qSupported packet, because this is the same buffer we were
4835 if (rs
->buf_size
< rs
->explicit_packet_size
)
4837 rs
->buf_size
= rs
->explicit_packet_size
;
4838 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4841 /* Handle the defaults for unmentioned features. */
4842 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4845 const struct protocol_feature
*feature
;
4847 feature
= &remote_protocol_features
[i
];
4848 feature
->func (feature
, feature
->default_support
, NULL
);
4852 /* Serial QUIT handler for the remote serial descriptor.
4854 Defers handling a Ctrl-C until we're done with the current
4855 command/response packet sequence, unless:
4857 - We're setting up the connection. Don't send a remote interrupt
4858 request, as we're not fully synced yet. Quit immediately
4861 - The target has been resumed in the foreground
4862 (target_terminal::is_ours is false) with a synchronous resume
4863 packet, and we're blocked waiting for the stop reply, thus a
4864 Ctrl-C should be immediately sent to the target.
4866 - We get a second Ctrl-C while still within the same serial read or
4867 write. In that case the serial is seemingly wedged --- offer to
4870 - We see a second Ctrl-C without target response, after having
4871 previously interrupted the target. In that case the target/stub
4872 is probably wedged --- offer to quit/disconnect.
4876 remote_serial_quit_handler (void)
4878 struct remote_state
*rs
= get_remote_state ();
4880 if (check_quit_flag ())
4882 /* If we're starting up, we're not fully synced yet. Quit
4884 if (rs
->starting_up
)
4886 else if (rs
->got_ctrlc_during_io
)
4888 if (query (_("The target is not responding to GDB commands.\n"
4889 "Stop debugging it? ")))
4890 remote_unpush_and_throw ();
4892 /* If ^C has already been sent once, offer to disconnect. */
4893 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
4895 /* All-stop protocol, and blocked waiting for stop reply. Send
4896 an interrupt request. */
4897 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
4898 target_interrupt ();
4900 rs
->got_ctrlc_during_io
= 1;
4904 /* Remove any of the remote.c targets from target stack. Upper targets depend
4905 on it so remove them first. */
4908 remote_unpush_target (void)
4910 pop_all_targets_at_and_above (process_stratum
);
4914 remote_unpush_and_throw (void)
4916 remote_unpush_target ();
4917 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
4921 remote_open_1 (const char *name
, int from_tty
,
4922 struct target_ops
*target
, int extended_p
)
4924 struct remote_state
*rs
= get_remote_state ();
4927 error (_("To open a remote debug connection, you need to specify what\n"
4928 "serial device is attached to the remote system\n"
4929 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4931 /* See FIXME above. */
4932 if (!target_async_permitted
)
4933 wait_forever_enabled_p
= 1;
4935 /* If we're connected to a running target, target_preopen will kill it.
4936 Ask this question first, before target_preopen has a chance to kill
4938 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
4941 && !query (_("Already connected to a remote target. Disconnect? ")))
4942 error (_("Still connected."));
4945 /* Here the possibly existing remote target gets unpushed. */
4946 target_preopen (from_tty
);
4948 /* Make sure we send the passed signals list the next time we resume. */
4949 xfree (rs
->last_pass_packet
);
4950 rs
->last_pass_packet
= NULL
;
4952 /* Make sure we send the program signals list the next time we
4954 xfree (rs
->last_program_signals_packet
);
4955 rs
->last_program_signals_packet
= NULL
;
4957 remote_fileio_reset ();
4958 reopen_exec_file ();
4961 rs
->remote_desc
= remote_serial_open (name
);
4962 if (!rs
->remote_desc
)
4963 perror_with_name (name
);
4965 if (baud_rate
!= -1)
4967 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
4969 /* The requested speed could not be set. Error out to
4970 top level after closing remote_desc. Take care to
4971 set remote_desc to NULL to avoid closing remote_desc
4973 serial_close (rs
->remote_desc
);
4974 rs
->remote_desc
= NULL
;
4975 perror_with_name (name
);
4979 serial_setparity (rs
->remote_desc
, serial_parity
);
4980 serial_raw (rs
->remote_desc
);
4982 /* If there is something sitting in the buffer we might take it as a
4983 response to a command, which would be bad. */
4984 serial_flush_input (rs
->remote_desc
);
4988 puts_filtered ("Remote debugging using ");
4989 puts_filtered (name
);
4990 puts_filtered ("\n");
4992 push_target (target
); /* Switch to using remote target now. */
4994 /* Register extra event sources in the event loop. */
4995 remote_async_inferior_event_token
4996 = create_async_event_handler (remote_async_inferior_event_handler
,
4998 rs
->notif_state
= remote_notif_state_allocate ();
5000 /* Reset the target state; these things will be queried either by
5001 remote_query_supported or as they are needed. */
5002 reset_all_packet_configs_support ();
5003 rs
->cached_wait_status
= 0;
5004 rs
->explicit_packet_size
= 0;
5006 rs
->extended
= extended_p
;
5007 rs
->waiting_for_stop_reply
= 0;
5008 rs
->ctrlc_pending_p
= 0;
5009 rs
->got_ctrlc_during_io
= 0;
5011 rs
->general_thread
= not_sent_ptid
;
5012 rs
->continue_thread
= not_sent_ptid
;
5013 rs
->remote_traceframe_number
= -1;
5015 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5017 /* Probe for ability to use "ThreadInfo" query, as required. */
5018 rs
->use_threadinfo_query
= 1;
5019 rs
->use_threadextra_query
= 1;
5021 readahead_cache_invalidate ();
5023 if (target_async_permitted
)
5025 /* FIXME: cagney/1999-09-23: During the initial connection it is
5026 assumed that the target is already ready and able to respond to
5027 requests. Unfortunately remote_start_remote() eventually calls
5028 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5029 around this. Eventually a mechanism that allows
5030 wait_for_inferior() to expect/get timeouts will be
5032 wait_forever_enabled_p
= 0;
5035 /* First delete any symbols previously loaded from shared libraries. */
5036 no_shared_libraries (NULL
, 0);
5039 init_thread_list ();
5041 /* Start the remote connection. If error() or QUIT, discard this
5042 target (we'd otherwise be in an inconsistent state) and then
5043 propogate the error on up the exception chain. This ensures that
5044 the caller doesn't stumble along blindly assuming that the
5045 function succeeded. The CLI doesn't have this problem but other
5046 UI's, such as MI do.
5048 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5049 this function should return an error indication letting the
5050 caller restore the previous state. Unfortunately the command
5051 ``target remote'' is directly wired to this function making that
5052 impossible. On a positive note, the CLI side of this problem has
5053 been fixed - the function set_cmd_context() makes it possible for
5054 all the ``target ....'' commands to share a common callback
5055 function. See cli-dump.c. */
5060 remote_start_remote (from_tty
, target
, extended_p
);
5062 CATCH (ex
, RETURN_MASK_ALL
)
5064 /* Pop the partially set up target - unless something else did
5065 already before throwing the exception. */
5066 if (rs
->remote_desc
!= NULL
)
5067 remote_unpush_target ();
5068 if (target_async_permitted
)
5069 wait_forever_enabled_p
= 1;
5070 throw_exception (ex
);
5075 remote_btrace_reset ();
5077 if (target_async_permitted
)
5078 wait_forever_enabled_p
= 1;
5081 /* Detach the specified process. */
5084 remote_detach_pid (int pid
)
5086 struct remote_state
*rs
= get_remote_state ();
5088 if (remote_multi_process_p (rs
))
5089 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5091 strcpy (rs
->buf
, "D");
5094 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5096 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5098 else if (rs
->buf
[0] == '\0')
5099 error (_("Remote doesn't know how to detach"));
5101 error (_("Can't detach process."));
5104 /* This detaches a program to which we previously attached, using
5105 inferior_ptid to identify the process. After this is done, GDB
5106 can be used to debug some other program. We better not have left
5107 any breakpoints in the target program or it'll die when it hits
5111 remote_detach_1 (int from_tty
, inferior
*inf
)
5113 int pid
= ptid_get_pid (inferior_ptid
);
5114 struct remote_state
*rs
= get_remote_state ();
5115 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5118 if (!target_has_execution
)
5119 error (_("No process to detach from."));
5121 target_announce_detach (from_tty
);
5123 /* Tell the remote target to detach. */
5124 remote_detach_pid (pid
);
5126 /* Exit only if this is the only active inferior. */
5127 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5128 puts_filtered (_("Ending remote debugging.\n"));
5130 /* Check to see if we are detaching a fork parent. Note that if we
5131 are detaching a fork child, tp == NULL. */
5132 is_fork_parent
= (tp
!= NULL
5133 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5135 /* If doing detach-on-fork, we don't mourn, because that will delete
5136 breakpoints that should be available for the followed inferior. */
5137 if (!is_fork_parent
)
5139 /* Save the pid as a string before mourning, since that will
5140 unpush the remote target, and we need the string after. */
5141 std::string infpid
= target_pid_to_str (pid_to_ptid (pid
));
5143 target_mourn_inferior (inferior_ptid
);
5144 if (print_inferior_events
)
5145 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5146 inf
->num
, infpid
.c_str ());
5150 inferior_ptid
= null_ptid
;
5151 detach_inferior (pid
);
5156 remote_detach (struct target_ops
*ops
, inferior
*inf
, int from_tty
)
5158 remote_detach_1 (from_tty
, inf
);
5162 extended_remote_detach (struct target_ops
*ops
, inferior
*inf
, int from_tty
)
5164 remote_detach_1 (from_tty
, inf
);
5167 /* Target follow-fork function for remote targets. On entry, and
5168 at return, the current inferior is the fork parent.
5170 Note that although this is currently only used for extended-remote,
5171 it is named remote_follow_fork in anticipation of using it for the
5172 remote target as well. */
5175 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5178 struct remote_state
*rs
= get_remote_state ();
5179 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5181 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5182 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5184 /* When following the parent and detaching the child, we detach
5185 the child here. For the case of following the child and
5186 detaching the parent, the detach is done in the target-
5187 independent follow fork code in infrun.c. We can't use
5188 target_detach when detaching an unfollowed child because
5189 the client side doesn't know anything about the child. */
5190 if (detach_fork
&& !follow_child
)
5192 /* Detach the fork child. */
5196 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5197 child_pid
= ptid_get_pid (child_ptid
);
5199 remote_detach_pid (child_pid
);
5205 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5206 in the program space of the new inferior. On entry and at return the
5207 current inferior is the exec'ing inferior. INF is the new exec'd
5208 inferior, which may be the same as the exec'ing inferior unless
5209 follow-exec-mode is "new". */
5212 remote_follow_exec (struct target_ops
*ops
,
5213 struct inferior
*inf
, char *execd_pathname
)
5215 /* We know that this is a target file name, so if it has the "target:"
5216 prefix we strip it off before saving it in the program space. */
5217 if (is_target_filename (execd_pathname
))
5218 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5220 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5223 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5226 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5229 error (_("Argument given to \"disconnect\" when remotely debugging."));
5231 /* Make sure we unpush even the extended remote targets. Calling
5232 target_mourn_inferior won't unpush, and remote_mourn won't
5233 unpush if there is more than one inferior left. */
5234 unpush_target (target
);
5235 generic_mourn_inferior ();
5238 puts_filtered ("Ending remote debugging.\n");
5241 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5242 be chatty about it. */
5245 extended_remote_attach (struct target_ops
*target
, const char *args
,
5248 struct remote_state
*rs
= get_remote_state ();
5250 char *wait_status
= NULL
;
5252 pid
= parse_pid_to_attach (args
);
5254 /* Remote PID can be freely equal to getpid, do not check it here the same
5255 way as in other targets. */
5257 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5258 error (_("This target does not support attaching to a process"));
5262 char *exec_file
= get_exec_file (0);
5265 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5266 target_pid_to_str (pid_to_ptid (pid
)));
5268 printf_unfiltered (_("Attaching to %s\n"),
5269 target_pid_to_str (pid_to_ptid (pid
)));
5271 gdb_flush (gdb_stdout
);
5274 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5276 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5278 switch (packet_ok (rs
->buf
,
5279 &remote_protocol_packets
[PACKET_vAttach
]))
5282 if (!target_is_non_stop_p ())
5284 /* Save the reply for later. */
5285 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5286 strcpy (wait_status
, rs
->buf
);
5288 else if (strcmp (rs
->buf
, "OK") != 0)
5289 error (_("Attaching to %s failed with: %s"),
5290 target_pid_to_str (pid_to_ptid (pid
)),
5293 case PACKET_UNKNOWN
:
5294 error (_("This target does not support attaching to a process"));
5296 error (_("Attaching to %s failed"),
5297 target_pid_to_str (pid_to_ptid (pid
)));
5300 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5302 inferior_ptid
= pid_to_ptid (pid
);
5304 if (target_is_non_stop_p ())
5306 struct thread_info
*thread
;
5308 /* Get list of threads. */
5309 remote_update_thread_list (target
);
5311 thread
= first_thread_of_process (pid
);
5313 inferior_ptid
= thread
->ptid
;
5315 inferior_ptid
= pid_to_ptid (pid
);
5317 /* Invalidate our notion of the remote current thread. */
5318 record_currthread (rs
, minus_one_ptid
);
5322 /* Now, if we have thread information, update inferior_ptid. */
5323 inferior_ptid
= remote_current_thread (inferior_ptid
);
5325 /* Add the main thread to the thread list. */
5326 thread_info
*thr
= add_thread_silent (inferior_ptid
);
5327 /* Don't consider the thread stopped until we've processed the
5328 saved stop reply. */
5329 set_executing (thr
->ptid
, true);
5332 /* Next, if the target can specify a description, read it. We do
5333 this before anything involving memory or registers. */
5334 target_find_description ();
5336 if (!target_is_non_stop_p ())
5338 /* Use the previously fetched status. */
5339 gdb_assert (wait_status
!= NULL
);
5341 if (target_can_async_p ())
5343 struct notif_event
*reply
5344 = remote_notif_parse (¬if_client_stop
, wait_status
);
5346 push_stop_reply ((struct stop_reply
*) reply
);
5352 gdb_assert (wait_status
!= NULL
);
5353 strcpy (rs
->buf
, wait_status
);
5354 rs
->cached_wait_status
= 1;
5358 gdb_assert (wait_status
== NULL
);
5361 /* Implementation of the to_post_attach method. */
5364 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5366 /* Get text, data & bss offsets. */
5369 /* In certain cases GDB might not have had the chance to start
5370 symbol lookup up until now. This could happen if the debugged
5371 binary is not using shared libraries, the vsyscall page is not
5372 present (on Linux) and the binary itself hadn't changed since the
5373 debugging process was started. */
5374 if (symfile_objfile
!= NULL
)
5375 remote_check_symbols();
5379 /* Check for the availability of vCont. This function should also check
5383 remote_vcont_probe (struct remote_state
*rs
)
5387 strcpy (rs
->buf
, "vCont?");
5389 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5392 /* Make sure that the features we assume are supported. */
5393 if (startswith (buf
, "vCont"))
5396 int support_c
, support_C
;
5398 rs
->supports_vCont
.s
= 0;
5399 rs
->supports_vCont
.S
= 0;
5402 rs
->supports_vCont
.t
= 0;
5403 rs
->supports_vCont
.r
= 0;
5404 while (p
&& *p
== ';')
5407 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5408 rs
->supports_vCont
.s
= 1;
5409 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5410 rs
->supports_vCont
.S
= 1;
5411 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5413 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5415 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5416 rs
->supports_vCont
.t
= 1;
5417 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5418 rs
->supports_vCont
.r
= 1;
5420 p
= strchr (p
, ';');
5423 /* If c, and C are not all supported, we can't use vCont. Clearing
5424 BUF will make packet_ok disable the packet. */
5425 if (!support_c
|| !support_C
)
5429 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5432 /* Helper function for building "vCont" resumptions. Write a
5433 resumption to P. ENDP points to one-passed-the-end of the buffer
5434 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5435 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5436 resumed thread should be single-stepped and/or signalled. If PTID
5437 equals minus_one_ptid, then all threads are resumed; if PTID
5438 represents a process, then all threads of the process are resumed;
5439 the thread to be stepped and/or signalled is given in the global
5443 append_resumption (char *p
, char *endp
,
5444 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5446 struct remote_state
*rs
= get_remote_state ();
5448 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5449 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5451 /* GDB is willing to range step. */
5452 && use_range_stepping
5453 /* Target supports range stepping. */
5454 && rs
->supports_vCont
.r
5455 /* We don't currently support range stepping multiple
5456 threads with a wildcard (though the protocol allows it,
5457 so stubs shouldn't make an active effort to forbid
5459 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5461 struct thread_info
*tp
;
5463 if (ptid_equal (ptid
, minus_one_ptid
))
5465 /* If we don't know about the target thread's tid, then
5466 we're resuming magic_null_ptid (see caller). */
5467 tp
= find_thread_ptid (magic_null_ptid
);
5470 tp
= find_thread_ptid (ptid
);
5471 gdb_assert (tp
!= NULL
);
5473 if (tp
->control
.may_range_step
)
5475 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5477 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5478 phex_nz (tp
->control
.step_range_start
,
5480 phex_nz (tp
->control
.step_range_end
,
5484 p
+= xsnprintf (p
, endp
- p
, ";s");
5487 p
+= xsnprintf (p
, endp
- p
, ";s");
5488 else if (siggnal
!= GDB_SIGNAL_0
)
5489 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5491 p
+= xsnprintf (p
, endp
- p
, ";c");
5493 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5497 /* All (-1) threads of process. */
5498 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5500 p
+= xsnprintf (p
, endp
- p
, ":");
5501 p
= write_ptid (p
, endp
, nptid
);
5503 else if (!ptid_equal (ptid
, minus_one_ptid
))
5505 p
+= xsnprintf (p
, endp
- p
, ":");
5506 p
= write_ptid (p
, endp
, ptid
);
5512 /* Clear the thread's private info on resume. */
5515 resume_clear_thread_private_info (struct thread_info
*thread
)
5517 if (thread
->priv
!= NULL
)
5519 remote_thread_info
*priv
= get_remote_thread_info (thread
);
5521 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5522 priv
->watch_data_address
= 0;
5526 /* Append a vCont continue-with-signal action for threads that have a
5527 non-zero stop signal. */
5530 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5532 struct thread_info
*thread
;
5534 ALL_NON_EXITED_THREADS (thread
)
5535 if (ptid_match (thread
->ptid
, ptid
)
5536 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5537 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5539 p
= append_resumption (p
, endp
, thread
->ptid
,
5540 0, thread
->suspend
.stop_signal
);
5541 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5542 resume_clear_thread_private_info (thread
);
5548 /* Set the target running, using the packets that use Hc
5552 remote_resume_with_hc (struct target_ops
*ops
,
5553 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5555 struct remote_state
*rs
= get_remote_state ();
5556 struct thread_info
*thread
;
5559 rs
->last_sent_signal
= siggnal
;
5560 rs
->last_sent_step
= step
;
5562 /* The c/s/C/S resume packets use Hc, so set the continue
5564 if (ptid_equal (ptid
, minus_one_ptid
))
5565 set_continue_thread (any_thread_ptid
);
5567 set_continue_thread (ptid
);
5569 ALL_NON_EXITED_THREADS (thread
)
5570 resume_clear_thread_private_info (thread
);
5573 if (execution_direction
== EXEC_REVERSE
)
5575 /* We don't pass signals to the target in reverse exec mode. */
5576 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5577 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5580 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5581 error (_("Remote reverse-step not supported."));
5582 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5583 error (_("Remote reverse-continue not supported."));
5585 strcpy (buf
, step
? "bs" : "bc");
5587 else if (siggnal
!= GDB_SIGNAL_0
)
5589 buf
[0] = step
? 'S' : 'C';
5590 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5591 buf
[2] = tohex (((int) siggnal
) & 0xf);
5595 strcpy (buf
, step
? "s" : "c");
5600 /* Resume the remote inferior by using a "vCont" packet. The thread
5601 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5602 resumed thread should be single-stepped and/or signalled. If PTID
5603 equals minus_one_ptid, then all threads are resumed; the thread to
5604 be stepped and/or signalled is given in the global INFERIOR_PTID.
5605 This function returns non-zero iff it resumes the inferior.
5607 This function issues a strict subset of all possible vCont commands
5611 remote_resume_with_vcont (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5613 struct remote_state
*rs
= get_remote_state ();
5617 /* No reverse execution actions defined for vCont. */
5618 if (execution_direction
== EXEC_REVERSE
)
5621 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5622 remote_vcont_probe (rs
);
5624 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5628 endp
= rs
->buf
+ get_remote_packet_size ();
5630 /* If we could generate a wider range of packets, we'd have to worry
5631 about overflowing BUF. Should there be a generic
5632 "multi-part-packet" packet? */
5634 p
+= xsnprintf (p
, endp
- p
, "vCont");
5636 if (ptid_equal (ptid
, magic_null_ptid
))
5638 /* MAGIC_NULL_PTID means that we don't have any active threads,
5639 so we don't have any TID numbers the inferior will
5640 understand. Make sure to only send forms that do not specify
5642 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5644 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5646 /* Resume all threads (of all processes, or of a single
5647 process), with preference for INFERIOR_PTID. This assumes
5648 inferior_ptid belongs to the set of all threads we are about
5650 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5652 /* Step inferior_ptid, with or without signal. */
5653 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5656 /* Also pass down any pending signaled resumption for other
5657 threads not the current. */
5658 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5660 /* And continue others without a signal. */
5661 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5665 /* Scheduler locking; resume only PTID. */
5666 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5669 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5672 if (target_is_non_stop_p ())
5674 /* In non-stop, the stub replies to vCont with "OK". The stop
5675 reply will be reported asynchronously by means of a `%Stop'
5677 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5678 if (strcmp (rs
->buf
, "OK") != 0)
5679 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5685 /* Tell the remote machine to resume. */
5688 remote_resume (struct target_ops
*ops
,
5689 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5691 struct remote_state
*rs
= get_remote_state ();
5693 /* When connected in non-stop mode, the core resumes threads
5694 individually. Resuming remote threads directly in target_resume
5695 would thus result in sending one packet per thread. Instead, to
5696 minimize roundtrip latency, here we just store the resume
5697 request; the actual remote resumption will be done in
5698 target_commit_resume / remote_commit_resume, where we'll be able
5699 to do vCont action coalescing. */
5700 if (target_is_non_stop_p () && execution_direction
!= EXEC_REVERSE
)
5702 remote_thread_info
*remote_thr
;
5704 if (ptid_equal (minus_one_ptid
, ptid
) || ptid_is_pid (ptid
))
5705 remote_thr
= get_remote_thread_info (inferior_ptid
);
5707 remote_thr
= get_remote_thread_info (ptid
);
5709 remote_thr
->last_resume_step
= step
;
5710 remote_thr
->last_resume_sig
= siggnal
;
5714 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5715 (explained in remote-notif.c:handle_notification) so
5716 remote_notif_process is not called. We need find a place where
5717 it is safe to start a 'vNotif' sequence. It is good to do it
5718 before resuming inferior, because inferior was stopped and no RSP
5719 traffic at that moment. */
5720 if (!target_is_non_stop_p ())
5721 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5723 rs
->last_resume_exec_dir
= execution_direction
;
5725 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5726 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
5727 remote_resume_with_hc (ops
, ptid
, step
, siggnal
);
5729 /* We are about to start executing the inferior, let's register it
5730 with the event loop. NOTE: this is the one place where all the
5731 execution commands end up. We could alternatively do this in each
5732 of the execution commands in infcmd.c. */
5733 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5734 into infcmd.c in order to allow inferior function calls to work
5735 NOT asynchronously. */
5736 if (target_can_async_p ())
5739 /* We've just told the target to resume. The remote server will
5740 wait for the inferior to stop, and then send a stop reply. In
5741 the mean time, we can't start another command/query ourselves
5742 because the stub wouldn't be ready to process it. This applies
5743 only to the base all-stop protocol, however. In non-stop (which
5744 only supports vCont), the stub replies with an "OK", and is
5745 immediate able to process further serial input. */
5746 if (!target_is_non_stop_p ())
5747 rs
->waiting_for_stop_reply
= 1;
5750 static void check_pending_events_prevent_wildcard_vcont
5751 (int *may_global_wildcard_vcont
);
5752 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
5754 /* Private per-inferior info for target remote processes. */
5756 struct remote_inferior
: public private_inferior
5758 /* Whether we can send a wildcard vCont for this process. */
5759 bool may_wildcard_vcont
= true;
5762 /* Get the remote private inferior data associated to INF. */
5764 static remote_inferior
*
5765 get_remote_inferior (inferior
*inf
)
5767 if (inf
->priv
== NULL
)
5768 inf
->priv
.reset (new remote_inferior
);
5770 return static_cast<remote_inferior
*> (inf
->priv
.get ());
5773 /* Structure used to track the construction of a vCont packet in the
5774 outgoing packet buffer. This is used to send multiple vCont
5775 packets if we have more actions than would fit a single packet. */
5777 struct vcont_builder
5779 /* Pointer to the first action. P points here if no action has been
5783 /* Where the next action will be appended. */
5786 /* The end of the buffer. Must never write past this. */
5790 /* Prepare the outgoing buffer for a new vCont packet. */
5793 vcont_builder_restart (struct vcont_builder
*builder
)
5795 struct remote_state
*rs
= get_remote_state ();
5797 builder
->p
= rs
->buf
;
5798 builder
->endp
= rs
->buf
+ get_remote_packet_size ();
5799 builder
->p
+= xsnprintf (builder
->p
, builder
->endp
- builder
->p
, "vCont");
5800 builder
->first_action
= builder
->p
;
5803 /* If the vCont packet being built has any action, send it to the
5807 vcont_builder_flush (struct vcont_builder
*builder
)
5809 struct remote_state
*rs
;
5811 if (builder
->p
== builder
->first_action
)
5814 rs
= get_remote_state ();
5816 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5817 if (strcmp (rs
->buf
, "OK") != 0)
5818 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5821 /* The largest action is range-stepping, with its two addresses. This
5822 is more than sufficient. If a new, bigger action is created, it'll
5823 quickly trigger a failed assertion in append_resumption (and we'll
5825 #define MAX_ACTION_SIZE 200
5827 /* Append a new vCont action in the outgoing packet being built. If
5828 the action doesn't fit the packet along with previous actions, push
5829 what we've got so far to the remote end and start over a new vCont
5830 packet (with the new action). */
5833 vcont_builder_push_action (struct vcont_builder
*builder
,
5834 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5836 char buf
[MAX_ACTION_SIZE
+ 1];
5840 endp
= append_resumption (buf
, buf
+ sizeof (buf
),
5841 ptid
, step
, siggnal
);
5843 /* Check whether this new action would fit in the vCont packet along
5844 with previous actions. If not, send what we've got so far and
5845 start a new vCont packet. */
5847 if (rsize
> builder
->endp
- builder
->p
)
5849 vcont_builder_flush (builder
);
5850 vcont_builder_restart (builder
);
5852 /* Should now fit. */
5853 gdb_assert (rsize
<= builder
->endp
- builder
->p
);
5856 memcpy (builder
->p
, buf
, rsize
);
5857 builder
->p
+= rsize
;
5861 /* to_commit_resume implementation. */
5864 remote_commit_resume (struct target_ops
*ops
)
5866 struct inferior
*inf
;
5867 struct thread_info
*tp
;
5868 int any_process_wildcard
;
5869 int may_global_wildcard_vcont
;
5870 struct vcont_builder vcont_builder
;
5872 /* If connected in all-stop mode, we'd send the remote resume
5873 request directly from remote_resume. Likewise if
5874 reverse-debugging, as there are no defined vCont actions for
5875 reverse execution. */
5876 if (!target_is_non_stop_p () || execution_direction
== EXEC_REVERSE
)
5879 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5880 instead of resuming all threads of each process individually.
5881 However, if any thread of a process must remain halted, we can't
5882 send wildcard resumes and must send one action per thread.
5884 Care must be taken to not resume threads/processes the server
5885 side already told us are stopped, but the core doesn't know about
5886 yet, because the events are still in the vStopped notification
5889 #1 => vCont s:p1.1;c
5891 #3 <= %Stopped T05 p1.1
5896 #8 (infrun handles the stop for p1.1 and continues stepping)
5897 #9 => vCont s:p1.1;c
5899 The last vCont above would resume thread p1.2 by mistake, because
5900 the server has no idea that the event for p1.2 had not been
5903 The server side must similarly ignore resume actions for the
5904 thread that has a pending %Stopped notification (and any other
5905 threads with events pending), until GDB acks the notification
5906 with vStopped. Otherwise, e.g., the following case is
5909 #1 => g (or any other packet)
5911 #3 <= %Stopped T05 p1.2
5912 #4 => vCont s:p1.1;c
5915 Above, the server must not resume thread p1.2. GDB can't know
5916 that p1.2 stopped until it acks the %Stopped notification, and
5917 since from GDB's perspective all threads should be running, it
5920 Finally, special care must also be given to handling fork/vfork
5921 events. A (v)fork event actually tells us that two processes
5922 stopped -- the parent and the child. Until we follow the fork,
5923 we must not resume the child. Therefore, if we have a pending
5924 fork follow, we must not send a global wildcard resume action
5925 (vCont;c). We can still send process-wide wildcards though. */
5927 /* Start by assuming a global wildcard (vCont;c) is possible. */
5928 may_global_wildcard_vcont
= 1;
5930 /* And assume every process is individually wildcard-able too. */
5931 ALL_NON_EXITED_INFERIORS (inf
)
5933 remote_inferior
*priv
= get_remote_inferior (inf
);
5935 priv
->may_wildcard_vcont
= true;
5938 /* Check for any pending events (not reported or processed yet) and
5939 disable process and global wildcard resumes appropriately. */
5940 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
5942 ALL_NON_EXITED_THREADS (tp
)
5944 /* If a thread of a process is not meant to be resumed, then we
5945 can't wildcard that process. */
5948 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
5950 /* And if we can't wildcard a process, we can't wildcard
5951 everything either. */
5952 may_global_wildcard_vcont
= 0;
5956 /* If a thread is the parent of an unfollowed fork, then we
5957 can't do a global wildcard, as that would resume the fork
5959 if (is_pending_fork_parent_thread (tp
))
5960 may_global_wildcard_vcont
= 0;
5963 /* Now let's build the vCont packet(s). Actions must be appended
5964 from narrower to wider scopes (thread -> process -> global). If
5965 we end up with too many actions for a single packet vcont_builder
5966 flushes the current vCont packet to the remote side and starts a
5968 vcont_builder_restart (&vcont_builder
);
5970 /* Threads first. */
5971 ALL_NON_EXITED_THREADS (tp
)
5973 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
5975 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
5978 gdb_assert (!thread_is_in_step_over_chain (tp
));
5980 if (!remote_thr
->last_resume_step
5981 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
5982 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
5984 /* We'll send a wildcard resume instead. */
5985 remote_thr
->vcont_resumed
= 1;
5989 vcont_builder_push_action (&vcont_builder
, tp
->ptid
,
5990 remote_thr
->last_resume_step
,
5991 remote_thr
->last_resume_sig
);
5992 remote_thr
->vcont_resumed
= 1;
5995 /* Now check whether we can send any process-wide wildcard. This is
5996 to avoid sending a global wildcard in the case nothing is
5997 supposed to be resumed. */
5998 any_process_wildcard
= 0;
6000 ALL_NON_EXITED_INFERIORS (inf
)
6002 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6004 any_process_wildcard
= 1;
6009 if (any_process_wildcard
)
6011 /* If all processes are wildcard-able, then send a single "c"
6012 action, otherwise, send an "all (-1) threads of process"
6013 continue action for each running process, if any. */
6014 if (may_global_wildcard_vcont
)
6016 vcont_builder_push_action (&vcont_builder
, minus_one_ptid
,
6021 ALL_NON_EXITED_INFERIORS (inf
)
6023 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6025 vcont_builder_push_action (&vcont_builder
,
6026 pid_to_ptid (inf
->pid
),
6033 vcont_builder_flush (&vcont_builder
);
6038 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6039 thread, all threads of a remote process, or all threads of all
6043 remote_stop_ns (ptid_t ptid
)
6045 struct remote_state
*rs
= get_remote_state ();
6047 char *endp
= rs
->buf
+ get_remote_packet_size ();
6049 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6050 remote_vcont_probe (rs
);
6052 if (!rs
->supports_vCont
.t
)
6053 error (_("Remote server does not support stopping threads"));
6055 if (ptid_equal (ptid
, minus_one_ptid
)
6056 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
6057 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6062 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6064 if (ptid_is_pid (ptid
))
6065 /* All (-1) threads of process. */
6066 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
6069 /* Small optimization: if we already have a stop reply for
6070 this thread, no use in telling the stub we want this
6072 if (peek_stop_reply (ptid
))
6078 write_ptid (p
, endp
, nptid
);
6081 /* In non-stop, we get an immediate OK reply. The stop reply will
6082 come in asynchronously by notification. */
6084 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6085 if (strcmp (rs
->buf
, "OK") != 0)
6086 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6089 /* All-stop version of target_interrupt. Sends a break or a ^C to
6090 interrupt the remote target. It is undefined which thread of which
6091 process reports the interrupt. */
6094 remote_interrupt_as (void)
6096 struct remote_state
*rs
= get_remote_state ();
6098 rs
->ctrlc_pending_p
= 1;
6100 /* If the inferior is stopped already, but the core didn't know
6101 about it yet, just ignore the request. The cached wait status
6102 will be collected in remote_wait. */
6103 if (rs
->cached_wait_status
)
6106 /* Send interrupt_sequence to remote target. */
6107 send_interrupt_sequence ();
6110 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6111 the remote target. It is undefined which thread of which process
6112 reports the interrupt. Throws an error if the packet is not
6113 supported by the server. */
6116 remote_interrupt_ns (void)
6118 struct remote_state
*rs
= get_remote_state ();
6120 char *endp
= rs
->buf
+ get_remote_packet_size ();
6122 xsnprintf (p
, endp
- p
, "vCtrlC");
6124 /* In non-stop, we get an immediate OK reply. The stop reply will
6125 come in asynchronously by notification. */
6127 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6129 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6133 case PACKET_UNKNOWN
:
6134 error (_("No support for interrupting the remote target."));
6136 error (_("Interrupting target failed: %s"), rs
->buf
);
6140 /* Implement the to_stop function for the remote targets. */
6143 remote_stop (struct target_ops
*self
, ptid_t ptid
)
6146 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6148 if (target_is_non_stop_p ())
6149 remote_stop_ns (ptid
);
6152 /* We don't currently have a way to transparently pause the
6153 remote target in all-stop mode. Interrupt it instead. */
6154 remote_interrupt_as ();
6158 /* Implement the to_interrupt function for the remote targets. */
6161 remote_interrupt (struct target_ops
*self
)
6164 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6166 if (target_is_non_stop_p ())
6167 remote_interrupt_ns ();
6169 remote_interrupt_as ();
6172 /* Implement the to_pass_ctrlc function for the remote targets. */
6175 remote_pass_ctrlc (struct target_ops
*self
)
6177 struct remote_state
*rs
= get_remote_state ();
6180 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6182 /* If we're starting up, we're not fully synced yet. Quit
6184 if (rs
->starting_up
)
6186 /* If ^C has already been sent once, offer to disconnect. */
6187 else if (rs
->ctrlc_pending_p
)
6190 target_interrupt ();
6193 /* Ask the user what to do when an interrupt is received. */
6196 interrupt_query (void)
6198 struct remote_state
*rs
= get_remote_state ();
6200 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6202 if (query (_("The target is not responding to interrupt requests.\n"
6203 "Stop debugging it? ")))
6205 remote_unpush_target ();
6206 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6211 if (query (_("Interrupted while waiting for the program.\n"
6212 "Give up waiting? ")))
6217 /* Enable/disable target terminal ownership. Most targets can use
6218 terminal groups to control terminal ownership. Remote targets are
6219 different in that explicit transfer of ownership to/from GDB/target
6223 remote_terminal_inferior (struct target_ops
*self
)
6225 /* NOTE: At this point we could also register our selves as the
6226 recipient of all input. Any characters typed could then be
6227 passed on down to the target. */
6231 remote_terminal_ours (struct target_ops
*self
)
6236 remote_console_output (char *msg
)
6240 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6243 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6247 fputs_unfiltered (tb
, gdb_stdtarg
);
6249 gdb_flush (gdb_stdtarg
);
6252 DEF_VEC_O(cached_reg_t
);
6254 typedef struct stop_reply
6256 struct notif_event base
;
6258 /* The identifier of the thread about this event */
6261 /* The remote state this event is associated with. When the remote
6262 connection, represented by a remote_state object, is closed,
6263 all the associated stop_reply events should be released. */
6264 struct remote_state
*rs
;
6266 struct target_waitstatus ws
;
6268 /* The architecture associated with the expedited registers. */
6271 /* Expedited registers. This makes remote debugging a bit more
6272 efficient for those targets that provide critical registers as
6273 part of their normal status mechanism (as another roundtrip to
6274 fetch them is avoided). */
6275 VEC(cached_reg_t
) *regcache
;
6277 enum target_stop_reason stop_reason
;
6279 CORE_ADDR watch_data_address
;
6284 DECLARE_QUEUE_P (stop_reply_p
);
6285 DEFINE_QUEUE_P (stop_reply_p
);
6286 /* The list of already fetched and acknowledged stop events. This
6287 queue is used for notification Stop, and other notifications
6288 don't need queue for their events, because the notification events
6289 of Stop can't be consumed immediately, so that events should be
6290 queued first, and be consumed by remote_wait_{ns,as} one per
6291 time. Other notifications can consume their events immediately,
6292 so queue is not needed for them. */
6293 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6296 stop_reply_xfree (struct stop_reply
*r
)
6298 notif_event_xfree ((struct notif_event
*) r
);
6301 /* Return the length of the stop reply queue. */
6304 stop_reply_queue_length (void)
6306 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6310 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6311 struct notif_event
*event
)
6313 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6317 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6318 struct notif_event
*event
)
6320 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6323 putpkt (self
->ack_command
);
6325 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6326 /* We got an unknown stop reply. */
6327 error (_("Unknown stop reply"));
6329 push_stop_reply (stop_reply
);
6333 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6335 /* We can't get pending events in remote_notif_process for
6336 notification stop, and we have to do this in remote_wait_ns
6337 instead. If we fetch all queued events from stub, remote stub
6338 may exit and we have no chance to process them back in
6340 mark_async_event_handler (remote_async_inferior_event_token
);
6345 stop_reply_dtr (struct notif_event
*event
)
6347 struct stop_reply
*r
= (struct stop_reply
*) event
;
6352 VEC_iterate (cached_reg_t
, r
->regcache
, ix
, reg
);
6356 VEC_free (cached_reg_t
, r
->regcache
);
6359 static struct notif_event
*
6360 remote_notif_stop_alloc_reply (void)
6362 /* We cast to a pointer to the "base class". */
6363 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6365 r
->dtr
= stop_reply_dtr
;
6370 /* A client of notification Stop. */
6372 struct notif_client notif_client_stop
=
6376 remote_notif_stop_parse
,
6377 remote_notif_stop_ack
,
6378 remote_notif_stop_can_get_pending_events
,
6379 remote_notif_stop_alloc_reply
,
6383 /* A parameter to pass data in and out. */
6385 struct queue_iter_param
6388 struct stop_reply
*output
;
6391 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6392 the pid of the process that owns the threads we want to check, or
6393 -1 if we want to check all threads. */
6396 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6399 if (ws
->kind
== TARGET_WAITKIND_FORKED
6400 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6402 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6409 /* Return the thread's pending status used to determine whether the
6410 thread is a fork parent stopped at a fork event. */
6412 static struct target_waitstatus
*
6413 thread_pending_fork_status (struct thread_info
*thread
)
6415 if (thread
->suspend
.waitstatus_pending_p
)
6416 return &thread
->suspend
.waitstatus
;
6418 return &thread
->pending_follow
;
6421 /* Determine if THREAD is a pending fork parent thread. */
6424 is_pending_fork_parent_thread (struct thread_info
*thread
)
6426 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6429 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6432 /* Check whether EVENT is a fork event, and if it is, remove the
6433 fork child from the context list passed in DATA. */
6436 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6437 QUEUE_ITER (stop_reply_p
) *iter
,
6441 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6442 struct threads_listing_context
*context
6443 = (struct threads_listing_context
*) param
->input
;
6445 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6446 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6447 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6448 context
->remove_thread (event
->ws
.value
.related_pid
);
6453 /* If CONTEXT contains any fork child threads that have not been
6454 reported yet, remove them from the CONTEXT list. If such a
6455 thread exists it is because we are stopped at a fork catchpoint
6456 and have not yet called follow_fork, which will set up the
6457 host-side data structures for the new process. */
6460 remove_new_fork_children (struct threads_listing_context
*context
)
6462 struct thread_info
* thread
;
6464 struct notif_client
*notif
= ¬if_client_stop
;
6465 struct queue_iter_param param
;
6467 /* For any threads stopped at a fork event, remove the corresponding
6468 fork child threads from the CONTEXT list. */
6469 ALL_NON_EXITED_THREADS (thread
)
6471 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6473 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6474 context
->remove_thread (ws
->value
.related_pid
);
6477 /* Check for any pending fork events (not reported or processed yet)
6478 in process PID and remove those fork child threads from the
6479 CONTEXT list as well. */
6480 remote_notif_get_pending_events (notif
);
6481 param
.input
= context
;
6482 param
.output
= NULL
;
6483 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6484 remove_child_of_pending_fork
, ¶m
);
6487 /* Check whether EVENT would prevent a global or process wildcard
6491 check_pending_event_prevents_wildcard_vcont_callback
6492 (QUEUE (stop_reply_p
) *q
,
6493 QUEUE_ITER (stop_reply_p
) *iter
,
6497 struct inferior
*inf
;
6498 int *may_global_wildcard_vcont
= (int *) data
;
6500 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6501 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6504 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6505 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6506 *may_global_wildcard_vcont
= 0;
6508 inf
= find_inferior_ptid (event
->ptid
);
6510 /* This may be the first time we heard about this process.
6511 Regardless, we must not do a global wildcard resume, otherwise
6512 we'd resume this process too. */
6513 *may_global_wildcard_vcont
= 0;
6515 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
6520 /* Check whether any event pending in the vStopped queue would prevent
6521 a global or process wildcard vCont action. Clear
6522 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6523 and clear the event inferior's may_wildcard_vcont flag if we can't
6524 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6527 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard
)
6529 struct notif_client
*notif
= ¬if_client_stop
;
6531 remote_notif_get_pending_events (notif
);
6532 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6533 check_pending_event_prevents_wildcard_vcont_callback
,
6534 may_global_wildcard
);
6537 /* Remove stop replies in the queue if its pid is equal to the given
6541 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6542 QUEUE_ITER (stop_reply_p
) *iter
,
6546 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6547 struct inferior
*inf
= (struct inferior
*) param
->input
;
6549 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6551 stop_reply_xfree (event
);
6552 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6558 /* Discard all pending stop replies of inferior INF. */
6561 discard_pending_stop_replies (struct inferior
*inf
)
6563 struct queue_iter_param param
;
6564 struct stop_reply
*reply
;
6565 struct remote_state
*rs
= get_remote_state ();
6566 struct remote_notif_state
*rns
= rs
->notif_state
;
6568 /* This function can be notified when an inferior exists. When the
6569 target is not remote, the notification state is NULL. */
6570 if (rs
->remote_desc
== NULL
)
6573 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6575 /* Discard the in-flight notification. */
6576 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6578 stop_reply_xfree (reply
);
6579 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6583 param
.output
= NULL
;
6584 /* Discard the stop replies we have already pulled with
6586 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6587 remove_stop_reply_for_inferior
, ¶m
);
6590 /* If its remote state is equal to the given remote state,
6591 remove EVENT from the stop reply queue. */
6594 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6595 QUEUE_ITER (stop_reply_p
) *iter
,
6599 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6600 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6602 if (event
->rs
== rs
)
6604 stop_reply_xfree (event
);
6605 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6611 /* Discard the stop replies for RS in stop_reply_queue. */
6614 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6616 struct queue_iter_param param
;
6619 param
.output
= NULL
;
6620 /* Discard the stop replies we have already pulled with
6622 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6623 remove_stop_reply_of_remote_state
, ¶m
);
6626 /* A parameter to pass data in and out. */
6629 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6630 QUEUE_ITER (stop_reply_p
) *iter
,
6634 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6635 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6637 if (ptid_match (event
->ptid
, *ptid
))
6639 param
->output
= event
;
6640 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6647 /* Remove the first reply in 'stop_reply_queue' which matches
6650 static struct stop_reply
*
6651 remote_notif_remove_queued_reply (ptid_t ptid
)
6653 struct queue_iter_param param
;
6655 param
.input
= &ptid
;
6656 param
.output
= NULL
;
6658 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6659 remote_notif_remove_once_on_match
, ¶m
);
6661 fprintf_unfiltered (gdb_stdlog
,
6662 "notif: discard queued event: 'Stop' in %s\n",
6663 target_pid_to_str (ptid
));
6665 return param
.output
;
6668 /* Look for a queued stop reply belonging to PTID. If one is found,
6669 remove it from the queue, and return it. Returns NULL if none is
6670 found. If there are still queued events left to process, tell the
6671 event loop to get back to target_wait soon. */
6673 static struct stop_reply
*
6674 queued_stop_reply (ptid_t ptid
)
6676 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6678 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6679 /* There's still at least an event left. */
6680 mark_async_event_handler (remote_async_inferior_event_token
);
6685 /* Push a fully parsed stop reply in the stop reply queue. Since we
6686 know that we now have at least one queued event left to pass to the
6687 core side, tell the event loop to get back to target_wait soon. */
6690 push_stop_reply (struct stop_reply
*new_event
)
6692 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6695 fprintf_unfiltered (gdb_stdlog
,
6696 "notif: push 'Stop' %s to queue %d\n",
6697 target_pid_to_str (new_event
->ptid
),
6698 QUEUE_length (stop_reply_p
,
6701 mark_async_event_handler (remote_async_inferior_event_token
);
6705 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6706 QUEUE_ITER (stop_reply_p
) *iter
,
6707 struct stop_reply
*event
,
6710 ptid_t
*ptid
= (ptid_t
*) data
;
6712 return !(ptid_equal (*ptid
, event
->ptid
)
6713 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6716 /* Returns true if we have a stop reply for PTID. */
6719 peek_stop_reply (ptid_t ptid
)
6721 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6722 stop_reply_match_ptid_and_ws
, &ptid
);
6725 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6726 starting with P and ending with PEND matches PREFIX. */
6729 strprefix (const char *p
, const char *pend
, const char *prefix
)
6731 for ( ; p
< pend
; p
++, prefix
++)
6734 return *prefix
== '\0';
6737 /* Parse the stop reply in BUF. Either the function succeeds, and the
6738 result is stored in EVENT, or throws an error. */
6741 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6743 remote_arch_state
*rsa
= NULL
;
6748 event
->ptid
= null_ptid
;
6749 event
->rs
= get_remote_state ();
6750 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6751 event
->ws
.value
.integer
= 0;
6752 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6753 event
->regcache
= NULL
;
6758 case 'T': /* Status with PC, SP, FP, ... */
6759 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6760 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6762 n... = register number
6763 r... = register contents
6766 p
= &buf
[3]; /* after Txx */
6772 p1
= strchr (p
, ':');
6774 error (_("Malformed packet(a) (missing colon): %s\n\
6778 error (_("Malformed packet(a) (missing register number): %s\n\
6782 /* Some "registers" are actually extended stop information.
6783 Note if you're adding a new entry here: GDB 7.9 and
6784 earlier assume that all register "numbers" that start
6785 with an hex digit are real register numbers. Make sure
6786 the server only sends such a packet if it knows the
6787 client understands it. */
6789 if (strprefix (p
, p1
, "thread"))
6790 event
->ptid
= read_ptid (++p1
, &p
);
6791 else if (strprefix (p
, p1
, "syscall_entry"))
6795 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6796 p
= unpack_varlen_hex (++p1
, &sysno
);
6797 event
->ws
.value
.syscall_number
= (int) sysno
;
6799 else if (strprefix (p
, p1
, "syscall_return"))
6803 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6804 p
= unpack_varlen_hex (++p1
, &sysno
);
6805 event
->ws
.value
.syscall_number
= (int) sysno
;
6807 else if (strprefix (p
, p1
, "watch")
6808 || strprefix (p
, p1
, "rwatch")
6809 || strprefix (p
, p1
, "awatch"))
6811 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6812 p
= unpack_varlen_hex (++p1
, &addr
);
6813 event
->watch_data_address
= (CORE_ADDR
) addr
;
6815 else if (strprefix (p
, p1
, "swbreak"))
6817 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6819 /* Make sure the stub doesn't forget to indicate support
6821 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6822 error (_("Unexpected swbreak stop reason"));
6824 /* The value part is documented as "must be empty",
6825 though we ignore it, in case we ever decide to make
6826 use of it in a backward compatible way. */
6827 p
= strchrnul (p1
+ 1, ';');
6829 else if (strprefix (p
, p1
, "hwbreak"))
6831 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6833 /* Make sure the stub doesn't forget to indicate support
6835 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6836 error (_("Unexpected hwbreak stop reason"));
6839 p
= strchrnul (p1
+ 1, ';');
6841 else if (strprefix (p
, p1
, "library"))
6843 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6844 p
= strchrnul (p1
+ 1, ';');
6846 else if (strprefix (p
, p1
, "replaylog"))
6848 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6849 /* p1 will indicate "begin" or "end", but it makes
6850 no difference for now, so ignore it. */
6851 p
= strchrnul (p1
+ 1, ';');
6853 else if (strprefix (p
, p1
, "core"))
6857 p
= unpack_varlen_hex (++p1
, &c
);
6860 else if (strprefix (p
, p1
, "fork"))
6862 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6863 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6865 else if (strprefix (p
, p1
, "vfork"))
6867 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6868 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6870 else if (strprefix (p
, p1
, "vforkdone"))
6872 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6873 p
= strchrnul (p1
+ 1, ';');
6875 else if (strprefix (p
, p1
, "exec"))
6878 char pathname
[PATH_MAX
];
6881 /* Determine the length of the execd pathname. */
6882 p
= unpack_varlen_hex (++p1
, &ignored
);
6883 pathlen
= (p
- p1
) / 2;
6885 /* Save the pathname for event reporting and for
6886 the next run command. */
6887 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6888 pathname
[pathlen
] = '\0';
6890 /* This is freed during event handling. */
6891 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6892 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6894 /* Skip the registers included in this packet, since
6895 they may be for an architecture different from the
6896 one used by the original program. */
6899 else if (strprefix (p
, p1
, "create"))
6901 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
6902 p
= strchrnul (p1
+ 1, ';');
6911 p
= strchrnul (p1
+ 1, ';');
6916 /* Maybe a real ``P'' register number. */
6917 p_temp
= unpack_varlen_hex (p
, &pnum
);
6918 /* If the first invalid character is the colon, we got a
6919 register number. Otherwise, it's an unknown stop
6923 /* If we haven't parsed the event's thread yet, find
6924 it now, in order to find the architecture of the
6925 reported expedited registers. */
6926 if (event
->ptid
== null_ptid
)
6928 const char *thr
= strstr (p1
+ 1, ";thread:");
6930 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
6934 /* Either the current thread hasn't changed,
6935 or the inferior is not multi-threaded.
6936 The event must be for the thread we last
6937 set as (or learned as being) current. */
6938 event
->ptid
= event
->rs
->general_thread
;
6944 inferior
*inf
= (event
->ptid
== null_ptid
6946 : find_inferior_ptid (event
->ptid
));
6947 /* If this is the first time we learn anything
6948 about this process, skip the registers
6949 included in this packet, since we don't yet
6950 know which architecture to use to parse them.
6951 We'll determine the architecture later when
6952 we process the stop reply and retrieve the
6953 target description, via
6954 remote_notice_new_inferior ->
6955 post_create_inferior. */
6958 p
= strchrnul (p1
+ 1, ';');
6963 event
->arch
= inf
->gdbarch
;
6964 rsa
= get_remote_arch_state (event
->arch
);
6968 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
6969 cached_reg_t cached_reg
;
6972 error (_("Remote sent bad register number %s: %s\n\
6974 hex_string (pnum
), p
, buf
);
6976 cached_reg
.num
= reg
->regnum
;
6977 cached_reg
.data
= (gdb_byte
*)
6978 xmalloc (register_size (event
->arch
, reg
->regnum
));
6981 fieldsize
= hex2bin (p
, cached_reg
.data
,
6982 register_size (event
->arch
, reg
->regnum
));
6984 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
6985 warning (_("Remote reply is too short: %s"), buf
);
6987 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
6991 /* Not a number. Silently skip unknown optional
6993 p
= strchrnul (p1
+ 1, ';');
6998 error (_("Remote register badly formatted: %s\nhere: %s"),
7003 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7007 case 'S': /* Old style status, just signal only. */
7011 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7012 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7013 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7014 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7016 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7019 case 'w': /* Thread exited. */
7024 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7025 p
= unpack_varlen_hex (&buf
[1], &value
);
7026 event
->ws
.value
.integer
= value
;
7028 error (_("stop reply packet badly formatted: %s"), buf
);
7029 event
->ptid
= read_ptid (++p
, NULL
);
7032 case 'W': /* Target exited. */
7039 /* GDB used to accept only 2 hex chars here. Stubs should
7040 only send more if they detect GDB supports multi-process
7042 p
= unpack_varlen_hex (&buf
[1], &value
);
7046 /* The remote process exited. */
7047 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7048 event
->ws
.value
.integer
= value
;
7052 /* The remote process exited with a signal. */
7053 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7054 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7055 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7057 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7060 /* If no process is specified, assume inferior_ptid. */
7061 pid
= ptid_get_pid (inferior_ptid
);
7070 else if (startswith (p
, "process:"))
7074 p
+= sizeof ("process:") - 1;
7075 unpack_varlen_hex (p
, &upid
);
7079 error (_("unknown stop reply packet: %s"), buf
);
7082 error (_("unknown stop reply packet: %s"), buf
);
7083 event
->ptid
= pid_to_ptid (pid
);
7087 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7088 event
->ptid
= minus_one_ptid
;
7092 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
7093 error (_("No process or thread specified in stop reply: %s"), buf
);
7096 /* When the stub wants to tell GDB about a new notification reply, it
7097 sends a notification (%Stop, for example). Those can come it at
7098 any time, hence, we have to make sure that any pending
7099 putpkt/getpkt sequence we're making is finished, before querying
7100 the stub for more events with the corresponding ack command
7101 (vStopped, for example). E.g., if we started a vStopped sequence
7102 immediately upon receiving the notification, something like this
7110 1.6) <-- (registers reply to step #1.3)
7112 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7115 To solve this, whenever we parse a %Stop notification successfully,
7116 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7117 doing whatever we were doing:
7123 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7124 2.5) <-- (registers reply to step #2.3)
7126 Eventualy after step #2.5, we return to the event loop, which
7127 notices there's an event on the
7128 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7129 associated callback --- the function below. At this point, we're
7130 always safe to start a vStopped sequence. :
7133 2.7) <-- T05 thread:2
7139 remote_notif_get_pending_events (struct notif_client
*nc
)
7141 struct remote_state
*rs
= get_remote_state ();
7143 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7146 fprintf_unfiltered (gdb_stdlog
,
7147 "notif: process: '%s' ack pending event\n",
7151 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7152 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7156 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7157 if (strcmp (rs
->buf
, "OK") == 0)
7160 remote_notif_ack (nc
, rs
->buf
);
7166 fprintf_unfiltered (gdb_stdlog
,
7167 "notif: process: '%s' no pending reply\n",
7172 /* Called when it is decided that STOP_REPLY holds the info of the
7173 event that is to be returned to the core. This function always
7174 destroys STOP_REPLY. */
7177 process_stop_reply (struct stop_reply
*stop_reply
,
7178 struct target_waitstatus
*status
)
7182 *status
= stop_reply
->ws
;
7183 ptid
= stop_reply
->ptid
;
7185 /* If no thread/process was reported by the stub, assume the current
7187 if (ptid_equal (ptid
, null_ptid
))
7188 ptid
= inferior_ptid
;
7190 if (status
->kind
!= TARGET_WAITKIND_EXITED
7191 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7192 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7194 /* Expedited registers. */
7195 if (stop_reply
->regcache
)
7197 struct regcache
*regcache
7198 = get_thread_arch_regcache (ptid
, stop_reply
->arch
);
7203 VEC_iterate (cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7206 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
7210 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7213 remote_notice_new_inferior (ptid
, 0);
7214 remote_thread_info
*remote_thr
= get_remote_thread_info (ptid
);
7215 remote_thr
->core
= stop_reply
->core
;
7216 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7217 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7218 remote_thr
->vcont_resumed
= 0;
7221 stop_reply_xfree (stop_reply
);
7225 /* The non-stop mode version of target_wait. */
7228 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7230 struct remote_state
*rs
= get_remote_state ();
7231 struct stop_reply
*stop_reply
;
7235 /* If in non-stop mode, get out of getpkt even if a
7236 notification is received. */
7238 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7239 0 /* forever */, &is_notif
);
7242 if (ret
!= -1 && !is_notif
)
7245 case 'E': /* Error of some sort. */
7246 /* We're out of sync with the target now. Did it continue
7247 or not? We can't tell which thread it was in non-stop,
7248 so just ignore this. */
7249 warning (_("Remote failure reply: %s"), rs
->buf
);
7251 case 'O': /* Console output. */
7252 remote_console_output (rs
->buf
+ 1);
7255 warning (_("Invalid remote reply: %s"), rs
->buf
);
7259 /* Acknowledge a pending stop reply that may have arrived in the
7261 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7262 remote_notif_get_pending_events (¬if_client_stop
);
7264 /* If indeed we noticed a stop reply, we're done. */
7265 stop_reply
= queued_stop_reply (ptid
);
7266 if (stop_reply
!= NULL
)
7267 return process_stop_reply (stop_reply
, status
);
7269 /* Still no event. If we're just polling for an event, then
7270 return to the event loop. */
7271 if (options
& TARGET_WNOHANG
)
7273 status
->kind
= TARGET_WAITKIND_IGNORE
;
7274 return minus_one_ptid
;
7277 /* Otherwise do a blocking wait. */
7278 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7279 1 /* forever */, &is_notif
);
7283 /* Wait until the remote machine stops, then return, storing status in
7284 STATUS just as `wait' would. */
7287 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7289 struct remote_state
*rs
= get_remote_state ();
7290 ptid_t event_ptid
= null_ptid
;
7292 struct stop_reply
*stop_reply
;
7296 status
->kind
= TARGET_WAITKIND_IGNORE
;
7297 status
->value
.integer
= 0;
7299 stop_reply
= queued_stop_reply (ptid
);
7300 if (stop_reply
!= NULL
)
7301 return process_stop_reply (stop_reply
, status
);
7303 if (rs
->cached_wait_status
)
7304 /* Use the cached wait status, but only once. */
7305 rs
->cached_wait_status
= 0;
7310 int forever
= ((options
& TARGET_WNOHANG
) == 0
7311 && wait_forever_enabled_p
);
7313 if (!rs
->waiting_for_stop_reply
)
7315 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7316 return minus_one_ptid
;
7319 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7320 _never_ wait for ever -> test on target_is_async_p().
7321 However, before we do that we need to ensure that the caller
7322 knows how to take the target into/out of async mode. */
7323 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7324 forever
, &is_notif
);
7326 /* GDB gets a notification. Return to core as this event is
7328 if (ret
!= -1 && is_notif
)
7329 return minus_one_ptid
;
7331 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7332 return minus_one_ptid
;
7337 /* Assume that the target has acknowledged Ctrl-C unless we receive
7338 an 'F' or 'O' packet. */
7339 if (buf
[0] != 'F' && buf
[0] != 'O')
7340 rs
->ctrlc_pending_p
= 0;
7344 case 'E': /* Error of some sort. */
7345 /* We're out of sync with the target now. Did it continue or
7346 not? Not is more likely, so report a stop. */
7347 rs
->waiting_for_stop_reply
= 0;
7349 warning (_("Remote failure reply: %s"), buf
);
7350 status
->kind
= TARGET_WAITKIND_STOPPED
;
7351 status
->value
.sig
= GDB_SIGNAL_0
;
7353 case 'F': /* File-I/O request. */
7354 /* GDB may access the inferior memory while handling the File-I/O
7355 request, but we don't want GDB accessing memory while waiting
7356 for a stop reply. See the comments in putpkt_binary. Set
7357 waiting_for_stop_reply to 0 temporarily. */
7358 rs
->waiting_for_stop_reply
= 0;
7359 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7360 rs
->ctrlc_pending_p
= 0;
7361 /* GDB handled the File-I/O request, and the target is running
7362 again. Keep waiting for events. */
7363 rs
->waiting_for_stop_reply
= 1;
7365 case 'N': case 'T': case 'S': case 'X': case 'W':
7367 struct stop_reply
*stop_reply
;
7369 /* There is a stop reply to handle. */
7370 rs
->waiting_for_stop_reply
= 0;
7373 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7376 event_ptid
= process_stop_reply (stop_reply
, status
);
7379 case 'O': /* Console output. */
7380 remote_console_output (buf
+ 1);
7383 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7385 /* Zero length reply means that we tried 'S' or 'C' and the
7386 remote system doesn't support it. */
7387 target_terminal::ours_for_output ();
7389 ("Can't send signals to this remote system. %s not sent.\n",
7390 gdb_signal_to_name (rs
->last_sent_signal
));
7391 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7392 target_terminal::inferior ();
7394 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7398 /* else fallthrough */
7400 warning (_("Invalid remote reply: %s"), buf
);
7404 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7405 return minus_one_ptid
;
7406 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7408 /* Nothing interesting happened. If we're doing a non-blocking
7409 poll, we're done. Otherwise, go back to waiting. */
7410 if (options
& TARGET_WNOHANG
)
7411 return minus_one_ptid
;
7415 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7416 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7418 if (!ptid_equal (event_ptid
, null_ptid
))
7419 record_currthread (rs
, event_ptid
);
7421 event_ptid
= inferior_ptid
;
7424 /* A process exit. Invalidate our notion of current thread. */
7425 record_currthread (rs
, minus_one_ptid
);
7430 /* Wait until the remote machine stops, then return, storing status in
7431 STATUS just as `wait' would. */
7434 remote_wait (struct target_ops
*ops
,
7435 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7439 if (target_is_non_stop_p ())
7440 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7442 event_ptid
= remote_wait_as (ptid
, status
, options
);
7444 if (target_is_async_p ())
7446 /* If there are are events left in the queue tell the event loop
7448 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7449 mark_async_event_handler (remote_async_inferior_event_token
);
7455 /* Fetch a single register using a 'p' packet. */
7458 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7460 struct gdbarch
*gdbarch
= regcache
->arch ();
7461 struct remote_state
*rs
= get_remote_state ();
7463 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7466 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7469 if (reg
->pnum
== -1)
7474 p
+= hexnumstr (p
, reg
->pnum
);
7477 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7481 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7485 case PACKET_UNKNOWN
:
7488 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7489 gdbarch_register_name (regcache
->arch (),
7494 /* If this register is unfetchable, tell the regcache. */
7497 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7501 /* Otherwise, parse and supply the value. */
7507 error (_("fetch_register_using_p: early buf termination"));
7509 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7512 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7516 /* Fetch the registers included in the target's 'g' packet. */
7519 send_g_packet (void)
7521 struct remote_state
*rs
= get_remote_state ();
7524 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7526 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7527 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7528 error (_("Could not read registers; remote failure reply '%s'"),
7531 /* We can get out of synch in various cases. If the first character
7532 in the buffer is not a hex character, assume that has happened
7533 and try to fetch another packet to read. */
7534 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7535 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7536 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7537 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7540 fprintf_unfiltered (gdb_stdlog
,
7541 "Bad register packet; fetching a new packet\n");
7542 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7545 buf_len
= strlen (rs
->buf
);
7547 /* Sanity check the received packet. */
7548 if (buf_len
% 2 != 0)
7549 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7555 process_g_packet (struct regcache
*regcache
)
7557 struct gdbarch
*gdbarch
= regcache
->arch ();
7558 struct remote_state
*rs
= get_remote_state ();
7559 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7564 buf_len
= strlen (rs
->buf
);
7566 /* Further sanity checks, with knowledge of the architecture. */
7567 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7568 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7569 "bytes): %s"), rsa
->sizeof_g_packet
, buf_len
/ 2, rs
->buf
);
7571 /* Save the size of the packet sent to us by the target. It is used
7572 as a heuristic when determining the max size of packets that the
7573 target can safely receive. */
7574 if (rsa
->actual_register_packet_size
== 0)
7575 rsa
->actual_register_packet_size
= buf_len
;
7577 /* If this is smaller than we guessed the 'g' packet would be,
7578 update our records. A 'g' reply that doesn't include a register's
7579 value implies either that the register is not available, or that
7580 the 'p' packet must be used. */
7581 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7583 long sizeof_g_packet
= buf_len
/ 2;
7585 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7587 long offset
= rsa
->regs
[i
].offset
;
7588 long reg_size
= register_size (gdbarch
, i
);
7590 if (rsa
->regs
[i
].pnum
== -1)
7593 if (offset
>= sizeof_g_packet
)
7594 rsa
->regs
[i
].in_g_packet
= 0;
7595 else if (offset
+ reg_size
> sizeof_g_packet
)
7596 error (_("Truncated register %d in remote 'g' packet"), i
);
7598 rsa
->regs
[i
].in_g_packet
= 1;
7601 /* Looks valid enough, we can assume this is the correct length
7602 for a 'g' packet. It's important not to adjust
7603 rsa->sizeof_g_packet if we have truncated registers otherwise
7604 this "if" won't be run the next time the method is called
7605 with a packet of the same size and one of the internal errors
7606 below will trigger instead. */
7607 rsa
->sizeof_g_packet
= sizeof_g_packet
;
7610 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7612 /* Unimplemented registers read as all bits zero. */
7613 memset (regs
, 0, rsa
->sizeof_g_packet
);
7615 /* Reply describes registers byte by byte, each byte encoded as two
7616 hex characters. Suck them all up, then supply them to the
7617 register cacheing/storage mechanism. */
7620 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7622 if (p
[0] == 0 || p
[1] == 0)
7623 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7624 internal_error (__FILE__
, __LINE__
,
7625 _("unexpected end of 'g' packet reply"));
7627 if (p
[0] == 'x' && p
[1] == 'x')
7628 regs
[i
] = 0; /* 'x' */
7630 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7634 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7636 struct packet_reg
*r
= &rsa
->regs
[i
];
7637 long reg_size
= register_size (gdbarch
, i
);
7641 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
7642 /* This shouldn't happen - we adjusted in_g_packet above. */
7643 internal_error (__FILE__
, __LINE__
,
7644 _("unexpected end of 'g' packet reply"));
7645 else if (rs
->buf
[r
->offset
* 2] == 'x')
7647 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7648 /* The register isn't available, mark it as such (at
7649 the same time setting the value to zero). */
7650 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7653 regcache_raw_supply (regcache
, r
->regnum
,
7660 fetch_registers_using_g (struct regcache
*regcache
)
7663 process_g_packet (regcache
);
7666 /* Make the remote selected traceframe match GDB's selected
7670 set_remote_traceframe (void)
7673 struct remote_state
*rs
= get_remote_state ();
7675 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7678 /* Avoid recursion, remote_trace_find calls us again. */
7679 rs
->remote_traceframe_number
= get_traceframe_number ();
7681 newnum
= target_trace_find (tfind_number
,
7682 get_traceframe_number (), 0, 0, NULL
);
7684 /* Should not happen. If it does, all bets are off. */
7685 if (newnum
!= get_traceframe_number ())
7686 warning (_("could not set remote traceframe"));
7690 remote_fetch_registers (struct target_ops
*ops
,
7691 struct regcache
*regcache
, int regnum
)
7693 struct gdbarch
*gdbarch
= regcache
->arch ();
7694 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7697 set_remote_traceframe ();
7698 set_general_thread (regcache_get_ptid (regcache
));
7702 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7704 gdb_assert (reg
!= NULL
);
7706 /* If this register might be in the 'g' packet, try that first -
7707 we are likely to read more than one register. If this is the
7708 first 'g' packet, we might be overly optimistic about its
7709 contents, so fall back to 'p'. */
7710 if (reg
->in_g_packet
)
7712 fetch_registers_using_g (regcache
);
7713 if (reg
->in_g_packet
)
7717 if (fetch_register_using_p (regcache
, reg
))
7720 /* This register is not available. */
7721 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7726 fetch_registers_using_g (regcache
);
7728 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7729 if (!rsa
->regs
[i
].in_g_packet
)
7730 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7732 /* This register is not available. */
7733 regcache_raw_supply (regcache
, i
, NULL
);
7737 /* Prepare to store registers. Since we may send them all (using a
7738 'G' request), we have to read out the ones we don't want to change
7742 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7744 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7747 /* Make sure the entire registers array is valid. */
7748 switch (packet_support (PACKET_P
))
7750 case PACKET_DISABLE
:
7751 case PACKET_SUPPORT_UNKNOWN
:
7752 /* Make sure all the necessary registers are cached. */
7753 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7754 if (rsa
->regs
[i
].in_g_packet
)
7755 regcache_raw_update (regcache
, rsa
->regs
[i
].regnum
);
7762 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7763 packet was not recognized. */
7766 store_register_using_P (const struct regcache
*regcache
,
7767 struct packet_reg
*reg
)
7769 struct gdbarch
*gdbarch
= regcache
->arch ();
7770 struct remote_state
*rs
= get_remote_state ();
7771 /* Try storing a single register. */
7772 char *buf
= rs
->buf
;
7773 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7776 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7779 if (reg
->pnum
== -1)
7782 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7783 p
= buf
+ strlen (buf
);
7784 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7785 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7787 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7789 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7794 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7795 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7796 case PACKET_UNKNOWN
:
7799 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7803 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7804 contents of the register cache buffer. FIXME: ignores errors. */
7807 store_registers_using_G (const struct regcache
*regcache
)
7809 struct remote_state
*rs
= get_remote_state ();
7810 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7814 /* Extract all the registers in the regcache copying them into a
7819 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7820 memset (regs
, 0, rsa
->sizeof_g_packet
);
7821 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7823 struct packet_reg
*r
= &rsa
->regs
[i
];
7826 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7830 /* Command describes registers byte by byte,
7831 each byte encoded as two hex characters. */
7834 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7836 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7837 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7838 error (_("Could not write registers; remote failure reply '%s'"),
7842 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7843 of the register cache buffer. FIXME: ignores errors. */
7846 remote_store_registers (struct target_ops
*ops
,
7847 struct regcache
*regcache
, int regnum
)
7849 struct gdbarch
*gdbarch
= regcache
->arch ();
7850 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7853 set_remote_traceframe ();
7854 set_general_thread (regcache_get_ptid (regcache
));
7858 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7860 gdb_assert (reg
!= NULL
);
7862 /* Always prefer to store registers using the 'P' packet if
7863 possible; we often change only a small number of registers.
7864 Sometimes we change a larger number; we'd need help from a
7865 higher layer to know to use 'G'. */
7866 if (store_register_using_P (regcache
, reg
))
7869 /* For now, don't complain if we have no way to write the
7870 register. GDB loses track of unavailable registers too
7871 easily. Some day, this may be an error. We don't have
7872 any way to read the register, either... */
7873 if (!reg
->in_g_packet
)
7876 store_registers_using_G (regcache
);
7880 store_registers_using_G (regcache
);
7882 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7883 if (!rsa
->regs
[i
].in_g_packet
)
7884 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7885 /* See above for why we do not issue an error here. */
7890 /* Return the number of hex digits in num. */
7893 hexnumlen (ULONGEST num
)
7897 for (i
= 0; num
!= 0; i
++)
7900 return std::max (i
, 1);
7903 /* Set BUF to the minimum number of hex digits representing NUM. */
7906 hexnumstr (char *buf
, ULONGEST num
)
7908 int len
= hexnumlen (num
);
7910 return hexnumnstr (buf
, num
, len
);
7914 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7917 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7923 for (i
= width
- 1; i
>= 0; i
--)
7925 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7932 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7935 remote_address_masked (CORE_ADDR addr
)
7937 unsigned int address_size
= remote_address_size
;
7939 /* If "remoteaddresssize" was not set, default to target address size. */
7941 address_size
= gdbarch_addr_bit (target_gdbarch ());
7943 if (address_size
> 0
7944 && address_size
< (sizeof (ULONGEST
) * 8))
7946 /* Only create a mask when that mask can safely be constructed
7947 in a ULONGEST variable. */
7950 mask
= (mask
<< address_size
) - 1;
7956 /* Determine whether the remote target supports binary downloading.
7957 This is accomplished by sending a no-op memory write of zero length
7958 to the target at the specified address. It does not suffice to send
7959 the whole packet, since many stubs strip the eighth bit and
7960 subsequently compute a wrong checksum, which causes real havoc with
7963 NOTE: This can still lose if the serial line is not eight-bit
7964 clean. In cases like this, the user should clear "remote
7968 check_binary_download (CORE_ADDR addr
)
7970 struct remote_state
*rs
= get_remote_state ();
7972 switch (packet_support (PACKET_X
))
7974 case PACKET_DISABLE
:
7978 case PACKET_SUPPORT_UNKNOWN
:
7984 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7986 p
+= hexnumstr (p
, (ULONGEST
) 0);
7990 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7991 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7993 if (rs
->buf
[0] == '\0')
7996 fprintf_unfiltered (gdb_stdlog
,
7997 "binary downloading NOT "
7998 "supported by target\n");
7999 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8004 fprintf_unfiltered (gdb_stdlog
,
8005 "binary downloading supported by target\n");
8006 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8013 /* Helper function to resize the payload in order to try to get a good
8014 alignment. We try to write an amount of data such that the next write will
8015 start on an address aligned on REMOTE_ALIGN_WRITES. */
8018 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8020 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8023 /* Write memory data directly to the remote machine.
8024 This does not inform the data cache; the data cache uses this.
8025 HEADER is the starting part of the packet.
8026 MEMADDR is the address in the remote memory space.
8027 MYADDR is the address of the buffer in our space.
8028 LEN_UNITS is the number of addressable units to write.
8029 UNIT_SIZE is the length in bytes of an addressable unit.
8030 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8031 should send data as binary ('X'), or hex-encoded ('M').
8033 The function creates packet of the form
8034 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8036 where encoding of <DATA> is terminated by PACKET_FORMAT.
8038 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8041 Return the transferred status, error or OK (an
8042 'enum target_xfer_status' value). Save the number of addressable units
8043 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8045 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8046 exchange between gdb and the stub could look like (?? in place of the
8052 -> $M1000,3:eeeeffffeeee#??
8056 <- eeeeffffeeeedddd */
8058 static enum target_xfer_status
8059 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8060 const gdb_byte
*myaddr
, ULONGEST len_units
,
8061 int unit_size
, ULONGEST
*xfered_len_units
,
8062 char packet_format
, int use_length
)
8064 struct remote_state
*rs
= get_remote_state ();
8070 int payload_capacity_bytes
;
8071 int payload_length_bytes
;
8073 if (packet_format
!= 'X' && packet_format
!= 'M')
8074 internal_error (__FILE__
, __LINE__
,
8075 _("remote_write_bytes_aux: bad packet format"));
8078 return TARGET_XFER_EOF
;
8080 payload_capacity_bytes
= get_memory_write_packet_size ();
8082 /* The packet buffer will be large enough for the payload;
8083 get_memory_packet_size ensures this. */
8086 /* Compute the size of the actual payload by subtracting out the
8087 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8089 payload_capacity_bytes
-= strlen ("$,:#NN");
8091 /* The comma won't be used. */
8092 payload_capacity_bytes
+= 1;
8093 payload_capacity_bytes
-= strlen (header
);
8094 payload_capacity_bytes
-= hexnumlen (memaddr
);
8096 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8098 strcat (rs
->buf
, header
);
8099 p
= rs
->buf
+ strlen (header
);
8101 /* Compute a best guess of the number of bytes actually transfered. */
8102 if (packet_format
== 'X')
8104 /* Best guess at number of bytes that will fit. */
8105 todo_units
= std::min (len_units
,
8106 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8108 payload_capacity_bytes
-= hexnumlen (todo_units
);
8109 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8113 /* Number of bytes that will fit. */
8115 = std::min (len_units
,
8116 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8118 payload_capacity_bytes
-= hexnumlen (todo_units
);
8119 todo_units
= std::min (todo_units
,
8120 (payload_capacity_bytes
/ unit_size
) / 2);
8123 if (todo_units
<= 0)
8124 internal_error (__FILE__
, __LINE__
,
8125 _("minimum packet size too small to write data"));
8127 /* If we already need another packet, then try to align the end
8128 of this packet to a useful boundary. */
8129 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8130 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8132 /* Append "<memaddr>". */
8133 memaddr
= remote_address_masked (memaddr
);
8134 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8141 /* Append the length and retain its location and size. It may need to be
8142 adjusted once the packet body has been created. */
8144 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8152 /* Append the packet body. */
8153 if (packet_format
== 'X')
8155 /* Binary mode. Send target system values byte by byte, in
8156 increasing byte addresses. Only escape certain critical
8158 payload_length_bytes
=
8159 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8160 &units_written
, payload_capacity_bytes
);
8162 /* If not all TODO units fit, then we'll need another packet. Make
8163 a second try to keep the end of the packet aligned. Don't do
8164 this if the packet is tiny. */
8165 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8169 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8171 if (new_todo_units
!= units_written
)
8172 payload_length_bytes
=
8173 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8174 (gdb_byte
*) p
, &units_written
,
8175 payload_capacity_bytes
);
8178 p
+= payload_length_bytes
;
8179 if (use_length
&& units_written
< todo_units
)
8181 /* Escape chars have filled up the buffer prematurely,
8182 and we have actually sent fewer units than planned.
8183 Fix-up the length field of the packet. Use the same
8184 number of characters as before. */
8185 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8187 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8192 /* Normal mode: Send target system values byte by byte, in
8193 increasing byte addresses. Each byte is encoded as a two hex
8195 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8196 units_written
= todo_units
;
8199 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8200 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8202 if (rs
->buf
[0] == 'E')
8203 return TARGET_XFER_E_IO
;
8205 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8206 send fewer units than we'd planned. */
8207 *xfered_len_units
= (ULONGEST
) units_written
;
8208 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8211 /* Write memory data directly to the remote machine.
8212 This does not inform the data cache; the data cache uses this.
8213 MEMADDR is the address in the remote memory space.
8214 MYADDR is the address of the buffer in our space.
8215 LEN is the number of bytes.
8217 Return the transferred status, error or OK (an
8218 'enum target_xfer_status' value). Save the number of bytes
8219 transferred in *XFERED_LEN. Only transfer a single packet. */
8221 static enum target_xfer_status
8222 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
8223 int unit_size
, ULONGEST
*xfered_len
)
8225 const char *packet_format
= NULL
;
8227 /* Check whether the target supports binary download. */
8228 check_binary_download (memaddr
);
8230 switch (packet_support (PACKET_X
))
8233 packet_format
= "X";
8235 case PACKET_DISABLE
:
8236 packet_format
= "M";
8238 case PACKET_SUPPORT_UNKNOWN
:
8239 internal_error (__FILE__
, __LINE__
,
8240 _("remote_write_bytes: bad internal state"));
8242 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8245 return remote_write_bytes_aux (packet_format
,
8246 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8247 packet_format
[0], 1);
8250 /* Read memory data directly from the remote machine.
8251 This does not use the data cache; the data cache uses this.
8252 MEMADDR is the address in the remote memory space.
8253 MYADDR is the address of the buffer in our space.
8254 LEN_UNITS is the number of addressable memory units to read..
8255 UNIT_SIZE is the length in bytes of an addressable unit.
8257 Return the transferred status, error or OK (an
8258 'enum target_xfer_status' value). Save the number of bytes
8259 transferred in *XFERED_LEN_UNITS.
8261 See the comment of remote_write_bytes_aux for an example of
8262 memory read/write exchange between gdb and the stub. */
8264 static enum target_xfer_status
8265 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
8266 int unit_size
, ULONGEST
*xfered_len_units
)
8268 struct remote_state
*rs
= get_remote_state ();
8269 int buf_size_bytes
; /* Max size of packet output buffer. */
8274 buf_size_bytes
= get_memory_read_packet_size ();
8275 /* The packet buffer will be large enough for the payload;
8276 get_memory_packet_size ensures this. */
8278 /* Number of units that will fit. */
8279 todo_units
= std::min (len_units
,
8280 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8282 /* Construct "m"<memaddr>","<len>". */
8283 memaddr
= remote_address_masked (memaddr
);
8286 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8288 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8291 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8292 if (rs
->buf
[0] == 'E'
8293 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8294 && rs
->buf
[3] == '\0')
8295 return TARGET_XFER_E_IO
;
8296 /* Reply describes memory byte by byte, each byte encoded as two hex
8299 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8300 /* Return what we have. Let higher layers handle partial reads. */
8301 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8302 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8305 /* Using the set of read-only target sections of remote, read live
8308 For interface/parameters/return description see target.h,
8311 static enum target_xfer_status
8312 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
8313 ULONGEST memaddr
, ULONGEST len
,
8314 int unit_size
, ULONGEST
*xfered_len
)
8316 struct target_section
*secp
;
8317 struct target_section_table
*table
;
8319 secp
= target_section_by_addr (ops
, memaddr
);
8321 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8322 secp
->the_bfd_section
)
8325 struct target_section
*p
;
8326 ULONGEST memend
= memaddr
+ len
;
8328 table
= target_get_section_table (ops
);
8330 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8332 if (memaddr
>= p
->addr
)
8334 if (memend
<= p
->endaddr
)
8336 /* Entire transfer is within this section. */
8337 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8340 else if (memaddr
>= p
->endaddr
)
8342 /* This section ends before the transfer starts. */
8347 /* This section overlaps the transfer. Just do half. */
8348 len
= p
->endaddr
- memaddr
;
8349 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8356 return TARGET_XFER_EOF
;
8359 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8360 first if the requested memory is unavailable in traceframe.
8361 Otherwise, fall back to remote_read_bytes_1. */
8363 static enum target_xfer_status
8364 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
8365 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8366 ULONGEST
*xfered_len
)
8369 return TARGET_XFER_EOF
;
8371 if (get_traceframe_number () != -1)
8373 std::vector
<mem_range
> available
;
8375 /* If we fail to get the set of available memory, then the
8376 target does not support querying traceframe info, and so we
8377 attempt reading from the traceframe anyway (assuming the
8378 target implements the old QTro packet then). */
8379 if (traceframe_available_memory (&available
, memaddr
, len
))
8381 if (available
.empty () || available
[0].start
!= memaddr
)
8383 enum target_xfer_status res
;
8385 /* Don't read into the traceframe's available
8387 if (!available
.empty ())
8389 LONGEST oldlen
= len
;
8391 len
= available
[0].start
- memaddr
;
8392 gdb_assert (len
<= oldlen
);
8395 /* This goes through the topmost target again. */
8396 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8397 len
, unit_size
, xfered_len
);
8398 if (res
== TARGET_XFER_OK
)
8399 return TARGET_XFER_OK
;
8402 /* No use trying further, we know some memory starting
8403 at MEMADDR isn't available. */
8405 return (*xfered_len
!= 0) ?
8406 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8410 /* Don't try to read more than how much is available, in
8411 case the target implements the deprecated QTro packet to
8412 cater for older GDBs (the target's knowledge of read-only
8413 sections may be outdated by now). */
8414 len
= available
[0].length
;
8418 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8423 /* Sends a packet with content determined by the printf format string
8424 FORMAT and the remaining arguments, then gets the reply. Returns
8425 whether the packet was a success, a failure, or unknown. */
8427 static enum packet_result
remote_send_printf (const char *format
, ...)
8428 ATTRIBUTE_PRINTF (1, 2);
8430 static enum packet_result
8431 remote_send_printf (const char *format
, ...)
8433 struct remote_state
*rs
= get_remote_state ();
8434 int max_size
= get_remote_packet_size ();
8437 va_start (ap
, format
);
8440 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8441 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8443 if (putpkt (rs
->buf
) < 0)
8444 error (_("Communication problem with target."));
8447 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8449 return packet_check_result (rs
->buf
);
8452 /* Flash writing can take quite some time. We'll set
8453 effectively infinite timeout for flash operations.
8454 In future, we'll need to decide on a better approach. */
8455 static const int remote_flash_timeout
= 1000;
8458 remote_flash_erase (struct target_ops
*ops
,
8459 ULONGEST address
, LONGEST length
)
8461 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8462 enum packet_result ret
;
8463 scoped_restore restore_timeout
8464 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8466 ret
= remote_send_printf ("vFlashErase:%s,%s",
8467 phex (address
, addr_size
),
8471 case PACKET_UNKNOWN
:
8472 error (_("Remote target does not support flash erase"));
8474 error (_("Error erasing flash with vFlashErase packet"));
8480 static enum target_xfer_status
8481 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8482 ULONGEST length
, ULONGEST
*xfered_len
,
8483 const gdb_byte
*data
)
8485 scoped_restore restore_timeout
8486 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8487 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8492 remote_flash_done (struct target_ops
*ops
)
8496 scoped_restore restore_timeout
8497 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8499 ret
= remote_send_printf ("vFlashDone");
8503 case PACKET_UNKNOWN
:
8504 error (_("Remote target does not support vFlashDone"));
8506 error (_("Error finishing flash operation"));
8513 remote_files_info (struct target_ops
*ignore
)
8515 puts_filtered ("Debugging a target over a serial line.\n");
8518 /* Stuff for dealing with the packets which are part of this protocol.
8519 See comment at top of file for details. */
8521 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8522 error to higher layers. Called when a serial error is detected.
8523 The exception message is STRING, followed by a colon and a blank,
8524 the system error message for errno at function entry and final dot
8525 for output compatibility with throw_perror_with_name. */
8528 unpush_and_perror (const char *string
)
8530 int saved_errno
= errno
;
8532 remote_unpush_target ();
8533 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8534 safe_strerror (saved_errno
));
8537 /* Read a single character from the remote end. The current quit
8538 handler is overridden to avoid quitting in the middle of packet
8539 sequence, as that would break communication with the remote server.
8540 See remote_serial_quit_handler for more detail. */
8543 readchar (int timeout
)
8546 struct remote_state
*rs
= get_remote_state ();
8549 scoped_restore restore_quit
8550 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8552 rs
->got_ctrlc_during_io
= 0;
8554 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8556 if (rs
->got_ctrlc_during_io
)
8563 switch ((enum serial_rc
) ch
)
8566 remote_unpush_target ();
8567 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8570 unpush_and_perror (_("Remote communication error. "
8571 "Target disconnected."));
8573 case SERIAL_TIMEOUT
:
8579 /* Wrapper for serial_write that closes the target and throws if
8580 writing fails. The current quit handler is overridden to avoid
8581 quitting in the middle of packet sequence, as that would break
8582 communication with the remote server. See
8583 remote_serial_quit_handler for more detail. */
8586 remote_serial_write (const char *str
, int len
)
8588 struct remote_state
*rs
= get_remote_state ();
8590 scoped_restore restore_quit
8591 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8593 rs
->got_ctrlc_during_io
= 0;
8595 if (serial_write (rs
->remote_desc
, str
, len
))
8597 unpush_and_perror (_("Remote communication error. "
8598 "Target disconnected."));
8601 if (rs
->got_ctrlc_during_io
)
8605 /* Return a string representing an escaped version of BUF, of len N.
8606 E.g. \n is converted to \\n, \t to \\t, etc. */
8609 escape_buffer (const char *buf
, int n
)
8613 stb
.putstrn (buf
, n
, '\\');
8614 return std::move (stb
.string ());
8617 /* Display a null-terminated packet on stdout, for debugging, using C
8621 print_packet (const char *buf
)
8623 puts_filtered ("\"");
8624 fputstr_filtered (buf
, '"', gdb_stdout
);
8625 puts_filtered ("\"");
8629 putpkt (const char *buf
)
8631 return putpkt_binary (buf
, strlen (buf
));
8634 /* Send a packet to the remote machine, with error checking. The data
8635 of the packet is in BUF. The string in BUF can be at most
8636 get_remote_packet_size () - 5 to account for the $, # and checksum,
8637 and for a possible /0 if we are debugging (remote_debug) and want
8638 to print the sent packet as a string. */
8641 putpkt_binary (const char *buf
, int cnt
)
8643 struct remote_state
*rs
= get_remote_state ();
8645 unsigned char csum
= 0;
8646 gdb::def_vector
<char> data (cnt
+ 6);
8647 char *buf2
= data
.data ();
8653 /* Catch cases like trying to read memory or listing threads while
8654 we're waiting for a stop reply. The remote server wouldn't be
8655 ready to handle this request, so we'd hang and timeout. We don't
8656 have to worry about this in synchronous mode, because in that
8657 case it's not possible to issue a command while the target is
8658 running. This is not a problem in non-stop mode, because in that
8659 case, the stub is always ready to process serial input. */
8660 if (!target_is_non_stop_p ()
8661 && target_is_async_p ()
8662 && rs
->waiting_for_stop_reply
)
8664 error (_("Cannot execute this command while the target is running.\n"
8665 "Use the \"interrupt\" command to stop the target\n"
8666 "and then try again."));
8669 /* We're sending out a new packet. Make sure we don't look at a
8670 stale cached response. */
8671 rs
->cached_wait_status
= 0;
8673 /* Copy the packet into buffer BUF2, encapsulating it
8674 and giving it a checksum. */
8679 for (i
= 0; i
< cnt
; i
++)
8685 *p
++ = tohex ((csum
>> 4) & 0xf);
8686 *p
++ = tohex (csum
& 0xf);
8688 /* Send it over and over until we get a positive ack. */
8692 int started_error_output
= 0;
8698 int len
= (int) (p
- buf2
);
8701 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
8703 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
8705 if (len
> REMOTE_DEBUG_MAX_CHAR
)
8706 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
8707 len
- REMOTE_DEBUG_MAX_CHAR
);
8709 fprintf_unfiltered (gdb_stdlog
, "...");
8711 gdb_flush (gdb_stdlog
);
8713 remote_serial_write (buf2
, p
- buf2
);
8715 /* If this is a no acks version of the remote protocol, send the
8716 packet and move on. */
8720 /* Read until either a timeout occurs (-2) or '+' is read.
8721 Handle any notification that arrives in the mean time. */
8724 ch
= readchar (remote_timeout
);
8732 case SERIAL_TIMEOUT
:
8735 if (started_error_output
)
8737 putchar_unfiltered ('\n');
8738 started_error_output
= 0;
8747 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8751 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8753 case SERIAL_TIMEOUT
:
8757 break; /* Retransmit buffer. */
8761 fprintf_unfiltered (gdb_stdlog
,
8762 "Packet instead of Ack, ignoring it\n");
8763 /* It's probably an old response sent because an ACK
8764 was lost. Gobble up the packet and ack it so it
8765 doesn't get retransmitted when we resend this
8768 remote_serial_write ("+", 1);
8769 continue; /* Now, go look for +. */
8776 /* If we got a notification, handle it, and go back to looking
8778 /* We've found the start of a notification. Now
8779 collect the data. */
8780 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8785 std::string str
= escape_buffer (rs
->buf
, val
);
8787 fprintf_unfiltered (gdb_stdlog
,
8788 " Notification received: %s\n",
8791 handle_notification (rs
->notif_state
, rs
->buf
);
8792 /* We're in sync now, rewait for the ack. */
8799 if (!started_error_output
)
8801 started_error_output
= 1;
8802 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8804 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8805 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8814 if (!started_error_output
)
8816 started_error_output
= 1;
8817 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8819 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8823 break; /* Here to retransmit. */
8827 /* This is wrong. If doing a long backtrace, the user should be
8828 able to get out next time we call QUIT, without anything as
8829 violent as interrupt_query. If we want to provide a way out of
8830 here without getting to the next QUIT, it should be based on
8831 hitting ^C twice as in remote_wait. */
8843 /* Come here after finding the start of a frame when we expected an
8844 ack. Do our best to discard the rest of this packet. */
8853 c
= readchar (remote_timeout
);
8856 case SERIAL_TIMEOUT
:
8857 /* Nothing we can do. */
8860 /* Discard the two bytes of checksum and stop. */
8861 c
= readchar (remote_timeout
);
8863 c
= readchar (remote_timeout
);
8866 case '*': /* Run length encoding. */
8867 /* Discard the repeat count. */
8868 c
= readchar (remote_timeout
);
8873 /* A regular character. */
8879 /* Come here after finding the start of the frame. Collect the rest
8880 into *BUF, verifying the checksum, length, and handling run-length
8881 compression. NUL terminate the buffer. If there is not enough room,
8882 expand *BUF using xrealloc.
8884 Returns -1 on error, number of characters in buffer (ignoring the
8885 trailing NULL) on success. (could be extended to return one of the
8886 SERIAL status indications). */
8889 read_frame (char **buf_p
,
8896 struct remote_state
*rs
= get_remote_state ();
8903 c
= readchar (remote_timeout
);
8906 case SERIAL_TIMEOUT
:
8908 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8912 fputs_filtered ("Saw new packet start in middle of old one\n",
8914 return -1; /* Start a new packet, count retries. */
8917 unsigned char pktcsum
;
8923 check_0
= readchar (remote_timeout
);
8925 check_1
= readchar (remote_timeout
);
8927 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
8930 fputs_filtered ("Timeout in checksum, retrying\n",
8934 else if (check_0
< 0 || check_1
< 0)
8937 fputs_filtered ("Communication error in checksum\n",
8942 /* Don't recompute the checksum; with no ack packets we
8943 don't have any way to indicate a packet retransmission
8948 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
8949 if (csum
== pktcsum
)
8954 std::string str
= escape_buffer (buf
, bc
);
8956 fprintf_unfiltered (gdb_stdlog
,
8957 "Bad checksum, sentsum=0x%x, "
8958 "csum=0x%x, buf=%s\n",
8959 pktcsum
, csum
, str
.c_str ());
8961 /* Number of characters in buffer ignoring trailing
8965 case '*': /* Run length encoding. */
8970 c
= readchar (remote_timeout
);
8972 repeat
= c
- ' ' + 3; /* Compute repeat count. */
8974 /* The character before ``*'' is repeated. */
8976 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
8978 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
8980 /* Make some more room in the buffer. */
8981 *sizeof_buf
+= repeat
;
8982 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
8986 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
8992 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
8996 if (bc
>= *sizeof_buf
- 1)
8998 /* Make some more room in the buffer. */
9000 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9011 /* Read a packet from the remote machine, with error checking, and
9012 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9013 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9014 rather than timing out; this is used (in synchronous mode) to wait
9015 for a target that is is executing user code to stop. */
9016 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9017 don't have to change all the calls to getpkt to deal with the
9018 return value, because at the moment I don't know what the right
9019 thing to do it for those. */
9025 getpkt_sane (buf
, sizeof_buf
, forever
);
9029 /* Read a packet from the remote machine, with error checking, and
9030 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9031 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9032 rather than timing out; this is used (in synchronous mode) to wait
9033 for a target that is is executing user code to stop. If FOREVER ==
9034 0, this function is allowed to time out gracefully and return an
9035 indication of this to the caller. Otherwise return the number of
9036 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9037 enough reason to return to the caller. *IS_NOTIF is an output
9038 boolean that indicates whether *BUF holds a notification or not
9039 (a regular packet). */
9042 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
9043 int expecting_notif
, int *is_notif
)
9045 struct remote_state
*rs
= get_remote_state ();
9051 /* We're reading a new response. Make sure we don't look at a
9052 previously cached response. */
9053 rs
->cached_wait_status
= 0;
9055 strcpy (*buf
, "timeout");
9058 timeout
= watchdog
> 0 ? watchdog
: -1;
9059 else if (expecting_notif
)
9060 timeout
= 0; /* There should already be a char in the buffer. If
9063 timeout
= remote_timeout
;
9067 /* Process any number of notifications, and then return when
9071 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9073 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9075 /* This can loop forever if the remote side sends us
9076 characters continuously, but if it pauses, we'll get
9077 SERIAL_TIMEOUT from readchar because of timeout. Then
9078 we'll count that as a retry.
9080 Note that even when forever is set, we will only wait
9081 forever prior to the start of a packet. After that, we
9082 expect characters to arrive at a brisk pace. They should
9083 show up within remote_timeout intervals. */
9085 c
= readchar (timeout
);
9086 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9088 if (c
== SERIAL_TIMEOUT
)
9090 if (expecting_notif
)
9091 return -1; /* Don't complain, it's normal to not get
9092 anything in this case. */
9094 if (forever
) /* Watchdog went off? Kill the target. */
9096 remote_unpush_target ();
9097 throw_error (TARGET_CLOSE_ERROR
,
9098 _("Watchdog timeout has expired. "
9099 "Target detached."));
9102 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9106 /* We've found the start of a packet or notification.
9107 Now collect the data. */
9108 val
= read_frame (buf
, sizeof_buf
);
9113 remote_serial_write ("-", 1);
9116 if (tries
> MAX_TRIES
)
9118 /* We have tried hard enough, and just can't receive the
9119 packet/notification. Give up. */
9120 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9122 /* Skip the ack char if we're in no-ack mode. */
9123 if (!rs
->noack_mode
)
9124 remote_serial_write ("+", 1);
9128 /* If we got an ordinary packet, return that to our caller. */
9134 = escape_buffer (*buf
,
9135 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9137 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9140 if (val
> REMOTE_DEBUG_MAX_CHAR
)
9141 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9142 val
- REMOTE_DEBUG_MAX_CHAR
);
9144 fprintf_unfiltered (gdb_stdlog
, "\n");
9147 /* Skip the ack char if we're in no-ack mode. */
9148 if (!rs
->noack_mode
)
9149 remote_serial_write ("+", 1);
9150 if (is_notif
!= NULL
)
9155 /* If we got a notification, handle it, and go back to looking
9159 gdb_assert (c
== '%');
9163 std::string str
= escape_buffer (*buf
, val
);
9165 fprintf_unfiltered (gdb_stdlog
,
9166 " Notification received: %s\n",
9169 if (is_notif
!= NULL
)
9172 handle_notification (rs
->notif_state
, *buf
);
9174 /* Notifications require no acknowledgement. */
9176 if (expecting_notif
)
9183 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9185 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9189 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9192 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9196 /* Check whether EVENT is a fork event for the process specified
9197 by the pid passed in DATA, and if it is, kill the fork child. */
9200 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
9201 QUEUE_ITER (stop_reply_p
) *iter
,
9205 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
9206 int parent_pid
= *(int *) param
->input
;
9208 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
9210 struct remote_state
*rs
= get_remote_state ();
9211 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
9214 res
= remote_vkill (child_pid
, rs
);
9216 error (_("Can't kill fork child process %d"), child_pid
);
9222 /* Kill any new fork children of process PID that haven't been
9223 processed by follow_fork. */
9226 kill_new_fork_children (int pid
, struct remote_state
*rs
)
9228 struct thread_info
*thread
;
9229 struct notif_client
*notif
= ¬if_client_stop
;
9230 struct queue_iter_param param
;
9232 /* Kill the fork child threads of any threads in process PID
9233 that are stopped at a fork event. */
9234 ALL_NON_EXITED_THREADS (thread
)
9236 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9238 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9240 struct remote_state
*rs
= get_remote_state ();
9241 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
9244 res
= remote_vkill (child_pid
, rs
);
9246 error (_("Can't kill fork child process %d"), child_pid
);
9250 /* Check for any pending fork events (not reported or processed yet)
9251 in process PID and kill those fork child threads as well. */
9252 remote_notif_get_pending_events (notif
);
9254 param
.output
= NULL
;
9255 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
9256 kill_child_of_pending_fork
, ¶m
);
9260 /* Target hook to kill the current inferior. */
9263 remote_kill (struct target_ops
*ops
)
9266 int pid
= ptid_get_pid (inferior_ptid
);
9267 struct remote_state
*rs
= get_remote_state ();
9269 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9271 /* If we're stopped while forking and we haven't followed yet,
9272 kill the child task. We need to do this before killing the
9273 parent task because if this is a vfork then the parent will
9275 kill_new_fork_children (pid
, rs
);
9277 res
= remote_vkill (pid
, rs
);
9280 target_mourn_inferior (inferior_ptid
);
9285 /* If we are in 'target remote' mode and we are killing the only
9286 inferior, then we will tell gdbserver to exit and unpush the
9288 if (res
== -1 && !remote_multi_process_p (rs
)
9289 && number_of_live_inferiors () == 1)
9293 /* We've killed the remote end, we get to mourn it. If we are
9294 not in extended mode, mourning the inferior also unpushes
9295 remote_ops from the target stack, which closes the remote
9297 target_mourn_inferior (inferior_ptid
);
9302 error (_("Can't kill process"));
9305 /* Send a kill request to the target using the 'vKill' packet. */
9308 remote_vkill (int pid
, struct remote_state
*rs
)
9310 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9313 /* Tell the remote target to detach. */
9314 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9316 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9318 switch (packet_ok (rs
->buf
,
9319 &remote_protocol_packets
[PACKET_vKill
]))
9325 case PACKET_UNKNOWN
:
9328 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9332 /* Send a kill request to the target using the 'k' packet. */
9335 remote_kill_k (void)
9337 /* Catch errors so the user can quit from gdb even when we
9338 aren't on speaking terms with the remote system. */
9343 CATCH (ex
, RETURN_MASK_ERROR
)
9345 if (ex
.error
== TARGET_CLOSE_ERROR
)
9347 /* If we got an (EOF) error that caused the target
9348 to go away, then we're done, that's what we wanted.
9349 "k" is susceptible to cause a premature EOF, given
9350 that the remote server isn't actually required to
9351 reply to "k", and it can happen that it doesn't
9352 even get to reply ACK to the "k". */
9356 /* Otherwise, something went wrong. We didn't actually kill
9357 the target. Just propagate the exception, and let the
9358 user or higher layers decide what to do. */
9359 throw_exception (ex
);
9365 remote_mourn (struct target_ops
*target
)
9367 struct remote_state
*rs
= get_remote_state ();
9369 /* In 'target remote' mode with one inferior, we close the connection. */
9370 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9372 unpush_target (target
);
9374 /* remote_close takes care of doing most of the clean up. */
9375 generic_mourn_inferior ();
9379 /* In case we got here due to an error, but we're going to stay
9381 rs
->waiting_for_stop_reply
= 0;
9383 /* If the current general thread belonged to the process we just
9384 detached from or has exited, the remote side current general
9385 thread becomes undefined. Considering a case like this:
9387 - We just got here due to a detach.
9388 - The process that we're detaching from happens to immediately
9389 report a global breakpoint being hit in non-stop mode, in the
9390 same thread we had selected before.
9391 - GDB attaches to this process again.
9392 - This event happens to be the next event we handle.
9394 GDB would consider that the current general thread didn't need to
9395 be set on the stub side (with Hg), since for all it knew,
9396 GENERAL_THREAD hadn't changed.
9398 Notice that although in all-stop mode, the remote server always
9399 sets the current thread to the thread reporting the stop event,
9400 that doesn't happen in non-stop mode; in non-stop, the stub *must
9401 not* change the current thread when reporting a breakpoint hit,
9402 due to the decoupling of event reporting and event handling.
9404 To keep things simple, we always invalidate our notion of the
9406 record_currthread (rs
, minus_one_ptid
);
9408 /* Call common code to mark the inferior as not running. */
9409 generic_mourn_inferior ();
9411 if (!have_inferiors ())
9413 if (!remote_multi_process_p (rs
))
9415 /* Check whether the target is running now - some remote stubs
9416 automatically restart after kill. */
9418 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9420 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9422 /* Assume that the target has been restarted. Set
9423 inferior_ptid so that bits of core GDB realizes
9424 there's something here, e.g., so that the user can
9425 say "kill" again. */
9426 inferior_ptid
= magic_null_ptid
;
9433 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9435 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9439 extended_remote_disable_randomization (int val
)
9441 struct remote_state
*rs
= get_remote_state ();
9444 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9447 reply
= remote_get_noisy_reply ();
9449 error (_("Target does not support QDisableRandomization."));
9450 if (strcmp (reply
, "OK") != 0)
9451 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9455 extended_remote_run (const std::string
&args
)
9457 struct remote_state
*rs
= get_remote_state ();
9459 const char *remote_exec_file
= get_remote_exec_file ();
9461 /* If the user has disabled vRun support, or we have detected that
9462 support is not available, do not try it. */
9463 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9466 strcpy (rs
->buf
, "vRun;");
9467 len
= strlen (rs
->buf
);
9469 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9470 error (_("Remote file name too long for run packet"));
9471 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9472 strlen (remote_exec_file
));
9478 gdb_argv
argv (args
.c_str ());
9479 for (i
= 0; argv
[i
] != NULL
; i
++)
9481 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9482 error (_("Argument list too long for run packet"));
9483 rs
->buf
[len
++] = ';';
9484 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9489 rs
->buf
[len
++] = '\0';
9492 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9494 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9497 /* We have a wait response. All is well. */
9499 case PACKET_UNKNOWN
:
9502 if (remote_exec_file
[0] == '\0')
9503 error (_("Running the default executable on the remote target failed; "
9504 "try \"set remote exec-file\"?"));
9506 error (_("Running \"%s\" on the remote target failed"),
9509 gdb_assert_not_reached (_("bad switch"));
9513 /* Helper function to send set/unset environment packets. ACTION is
9514 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9515 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9519 send_environment_packet (struct remote_state
*rs
,
9524 /* Convert the environment variable to an hex string, which
9525 is the best format to be transmitted over the wire. */
9526 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
9529 xsnprintf (rs
->buf
, get_remote_packet_size (),
9530 "%s:%s", packet
, encoded_value
.c_str ());
9533 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9534 if (strcmp (rs
->buf
, "OK") != 0)
9535 warning (_("Unable to %s environment variable '%s' on remote."),
9539 /* Helper function to handle the QEnvironment* packets. */
9542 extended_remote_environment_support (struct remote_state
*rs
)
9544 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
9546 putpkt ("QEnvironmentReset");
9547 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9548 if (strcmp (rs
->buf
, "OK") != 0)
9549 warning (_("Unable to reset environment on remote."));
9552 gdb_environ
*e
= ¤t_inferior ()->environment
;
9554 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
9555 for (const std::string
&el
: e
->user_set_env ())
9556 send_environment_packet (rs
, "set", "QEnvironmentHexEncoded",
9559 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
9560 for (const std::string
&el
: e
->user_unset_env ())
9561 send_environment_packet (rs
, "unset", "QEnvironmentUnset", el
.c_str ());
9564 /* Helper function to set the current working directory for the
9565 inferior in the remote target. */
9568 extended_remote_set_inferior_cwd (struct remote_state
*rs
)
9570 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
9572 const char *inferior_cwd
= get_inferior_cwd ();
9574 if (inferior_cwd
!= NULL
)
9576 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
9577 strlen (inferior_cwd
));
9579 xsnprintf (rs
->buf
, get_remote_packet_size (),
9580 "QSetWorkingDir:%s", hexpath
.c_str ());
9584 /* An empty inferior_cwd means that the user wants us to
9585 reset the remote server's inferior's cwd. */
9586 xsnprintf (rs
->buf
, get_remote_packet_size (),
9591 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9592 if (packet_ok (rs
->buf
,
9593 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
9596 Remote replied unexpectedly while setting the inferior's working\n\
9603 /* In the extended protocol we want to be able to do things like
9604 "run" and have them basically work as expected. So we need
9605 a special create_inferior function. We support changing the
9606 executable file and the command line arguments, but not the
9610 extended_remote_create_inferior (struct target_ops
*ops
,
9611 const char *exec_file
,
9612 const std::string
&args
,
9613 char **env
, int from_tty
)
9617 struct remote_state
*rs
= get_remote_state ();
9618 const char *remote_exec_file
= get_remote_exec_file ();
9620 /* If running asynchronously, register the target file descriptor
9621 with the event loop. */
9622 if (target_can_async_p ())
9625 /* Disable address space randomization if requested (and supported). */
9626 if (extended_remote_supports_disable_randomization (ops
))
9627 extended_remote_disable_randomization (disable_randomization
);
9629 /* If startup-with-shell is on, we inform gdbserver to start the
9630 remote inferior using a shell. */
9631 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
9633 xsnprintf (rs
->buf
, get_remote_packet_size (),
9634 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
9636 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9637 if (strcmp (rs
->buf
, "OK") != 0)
9639 Remote replied unexpectedly while setting startup-with-shell: %s"),
9643 extended_remote_environment_support (rs
);
9645 extended_remote_set_inferior_cwd (rs
);
9647 /* Now restart the remote server. */
9648 run_worked
= extended_remote_run (args
) != -1;
9651 /* vRun was not supported. Fail if we need it to do what the
9653 if (remote_exec_file
[0])
9654 error (_("Remote target does not support \"set remote exec-file\""));
9656 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9658 /* Fall back to "R". */
9659 extended_remote_restart ();
9662 if (!have_inferiors ())
9664 /* Clean up from the last time we ran, before we mark the target
9665 running again. This will mark breakpoints uninserted, and
9666 get_offsets may insert breakpoints. */
9667 init_thread_list ();
9668 init_wait_for_inferior ();
9671 /* vRun's success return is a stop reply. */
9672 stop_reply
= run_worked
? rs
->buf
: NULL
;
9673 add_current_inferior_and_thread (stop_reply
);
9675 /* Get updated offsets, if the stub uses qOffsets. */
9680 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9681 the list of conditions (in agent expression bytecode format), if any, the
9682 target needs to evaluate. The output is placed into the packet buffer
9683 started from BUF and ended at BUF_END. */
9686 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9687 struct bp_target_info
*bp_tgt
, char *buf
,
9690 if (bp_tgt
->conditions
.empty ())
9693 buf
+= strlen (buf
);
9694 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9697 /* Send conditions to the target. */
9698 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
9700 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9701 buf
+= strlen (buf
);
9702 for (int i
= 0; i
< aexpr
->len
; ++i
)
9703 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9710 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9711 struct bp_target_info
*bp_tgt
, char *buf
)
9713 if (bp_tgt
->tcommands
.empty ())
9716 buf
+= strlen (buf
);
9718 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9719 buf
+= strlen (buf
);
9721 /* Concatenate all the agent expressions that are commands into the
9723 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
9725 sprintf (buf
, "X%x,", aexpr
->len
);
9726 buf
+= strlen (buf
);
9727 for (int i
= 0; i
< aexpr
->len
; ++i
)
9728 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9733 /* Insert a breakpoint. On targets that have software breakpoint
9734 support, we ask the remote target to do the work; on targets
9735 which don't, we insert a traditional memory breakpoint. */
9738 remote_insert_breakpoint (struct target_ops
*ops
,
9739 struct gdbarch
*gdbarch
,
9740 struct bp_target_info
*bp_tgt
)
9742 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9743 If it succeeds, then set the support to PACKET_ENABLE. If it
9744 fails, and the user has explicitly requested the Z support then
9745 report an error, otherwise, mark it disabled and go on. */
9747 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9749 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9750 struct remote_state
*rs
;
9753 /* Make sure the remote is pointing at the right process, if
9755 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9756 set_general_process ();
9758 rs
= get_remote_state ();
9760 endbuf
= rs
->buf
+ get_remote_packet_size ();
9765 addr
= (ULONGEST
) remote_address_masked (addr
);
9766 p
+= hexnumstr (p
, addr
);
9767 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9769 if (remote_supports_cond_breakpoints (ops
))
9770 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9772 if (remote_can_run_breakpoint_commands (ops
))
9773 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9776 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9778 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9784 case PACKET_UNKNOWN
:
9789 /* If this breakpoint has target-side commands but this stub doesn't
9790 support Z0 packets, throw error. */
9791 if (!bp_tgt
->tcommands
.empty ())
9792 throw_error (NOT_SUPPORTED_ERROR
, _("\
9793 Target doesn't support breakpoints that have target side commands."));
9795 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9799 remote_remove_breakpoint (struct target_ops
*ops
,
9800 struct gdbarch
*gdbarch
,
9801 struct bp_target_info
*bp_tgt
,
9802 enum remove_bp_reason reason
)
9804 CORE_ADDR addr
= bp_tgt
->placed_address
;
9805 struct remote_state
*rs
= get_remote_state ();
9807 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9810 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9812 /* Make sure the remote is pointing at the right process, if
9814 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9815 set_general_process ();
9821 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9822 p
+= hexnumstr (p
, addr
);
9823 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9826 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9828 return (rs
->buf
[0] == 'E');
9831 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
, reason
);
9834 static enum Z_packet_type
9835 watchpoint_to_Z_packet (int type
)
9840 return Z_PACKET_WRITE_WP
;
9843 return Z_PACKET_READ_WP
;
9846 return Z_PACKET_ACCESS_WP
;
9849 internal_error (__FILE__
, __LINE__
,
9850 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9855 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9856 enum target_hw_bp_type type
, struct expression
*cond
)
9858 struct remote_state
*rs
= get_remote_state ();
9859 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9861 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9863 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9866 /* Make sure the remote is pointing at the right process, if
9868 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9869 set_general_process ();
9871 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9872 p
= strchr (rs
->buf
, '\0');
9873 addr
= remote_address_masked (addr
);
9874 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9875 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9878 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9880 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9884 case PACKET_UNKNOWN
:
9889 internal_error (__FILE__
, __LINE__
,
9890 _("remote_insert_watchpoint: reached end of function"));
9894 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9895 CORE_ADDR start
, int length
)
9897 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9899 return diff
< length
;
9904 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9905 enum target_hw_bp_type type
, struct expression
*cond
)
9907 struct remote_state
*rs
= get_remote_state ();
9908 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9910 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9912 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9915 /* Make sure the remote is pointing at the right process, if
9917 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9918 set_general_process ();
9920 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
9921 p
= strchr (rs
->buf
, '\0');
9922 addr
= remote_address_masked (addr
);
9923 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9924 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9926 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9928 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9931 case PACKET_UNKNOWN
:
9936 internal_error (__FILE__
, __LINE__
,
9937 _("remote_remove_watchpoint: reached end of function"));
9941 int remote_hw_watchpoint_limit
= -1;
9942 int remote_hw_watchpoint_length_limit
= -1;
9943 int remote_hw_breakpoint_limit
= -1;
9946 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
9947 CORE_ADDR addr
, int len
)
9949 if (remote_hw_watchpoint_length_limit
== 0)
9951 else if (remote_hw_watchpoint_length_limit
< 0)
9953 else if (len
<= remote_hw_watchpoint_length_limit
)
9960 remote_check_watch_resources (struct target_ops
*self
,
9961 enum bptype type
, int cnt
, int ot
)
9963 if (type
== bp_hardware_breakpoint
)
9965 if (remote_hw_breakpoint_limit
== 0)
9967 else if (remote_hw_breakpoint_limit
< 0)
9969 else if (cnt
<= remote_hw_breakpoint_limit
)
9974 if (remote_hw_watchpoint_limit
== 0)
9976 else if (remote_hw_watchpoint_limit
< 0)
9980 else if (cnt
<= remote_hw_watchpoint_limit
)
9986 /* The to_stopped_by_sw_breakpoint method of target remote. */
9989 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
9991 struct thread_info
*thread
= inferior_thread ();
9993 return (thread
->priv
!= NULL
9994 && (get_remote_thread_info (thread
)->stop_reason
9995 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
9998 /* The to_supports_stopped_by_sw_breakpoint method of target
10002 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10004 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10007 /* The to_stopped_by_hw_breakpoint method of target remote. */
10010 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10012 struct thread_info
*thread
= inferior_thread ();
10014 return (thread
->priv
!= NULL
10015 && (get_remote_thread_info (thread
)->stop_reason
10016 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10019 /* The to_supports_stopped_by_hw_breakpoint method of target
10023 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10025 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10029 remote_stopped_by_watchpoint (struct target_ops
*ops
)
10031 struct thread_info
*thread
= inferior_thread ();
10033 return (thread
->priv
!= NULL
10034 && (get_remote_thread_info (thread
)->stop_reason
10035 == TARGET_STOPPED_BY_WATCHPOINT
));
10039 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
10041 struct thread_info
*thread
= inferior_thread ();
10043 if (thread
->priv
!= NULL
10044 && (get_remote_thread_info (thread
)->stop_reason
10045 == TARGET_STOPPED_BY_WATCHPOINT
))
10047 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10056 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10057 struct bp_target_info
*bp_tgt
)
10059 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10060 struct remote_state
*rs
;
10064 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10067 /* Make sure the remote is pointing at the right process, if
10069 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10070 set_general_process ();
10072 rs
= get_remote_state ();
10074 endbuf
= rs
->buf
+ get_remote_packet_size ();
10080 addr
= remote_address_masked (addr
);
10081 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10082 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10084 if (remote_supports_cond_breakpoints (self
))
10085 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10087 if (remote_can_run_breakpoint_commands (self
))
10088 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10091 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10093 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10096 if (rs
->buf
[1] == '.')
10098 message
= strchr (rs
->buf
+ 2, '.');
10100 error (_("Remote failure reply: %s"), message
+ 1);
10103 case PACKET_UNKNOWN
:
10108 internal_error (__FILE__
, __LINE__
,
10109 _("remote_insert_hw_breakpoint: reached end of function"));
10114 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10115 struct bp_target_info
*bp_tgt
)
10118 struct remote_state
*rs
= get_remote_state ();
10120 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10122 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10125 /* Make sure the remote is pointing at the right process, if
10127 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10128 set_general_process ();
10134 addr
= remote_address_masked (bp_tgt
->placed_address
);
10135 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10136 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10139 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10141 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10144 case PACKET_UNKNOWN
:
10149 internal_error (__FILE__
, __LINE__
,
10150 _("remote_remove_hw_breakpoint: reached end of function"));
10153 /* Verify memory using the "qCRC:" request. */
10156 remote_verify_memory (struct target_ops
*ops
,
10157 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10159 struct remote_state
*rs
= get_remote_state ();
10160 unsigned long host_crc
, target_crc
;
10163 /* It doesn't make sense to use qCRC if the remote target is
10164 connected but not running. */
10165 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10167 enum packet_result result
;
10169 /* Make sure the remote is pointing at the right process. */
10170 set_general_process ();
10172 /* FIXME: assumes lma can fit into long. */
10173 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10174 (long) lma
, (long) size
);
10177 /* Be clever; compute the host_crc before waiting for target
10179 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10181 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10183 result
= packet_ok (rs
->buf
,
10184 &remote_protocol_packets
[PACKET_qCRC
]);
10185 if (result
== PACKET_ERROR
)
10187 else if (result
== PACKET_OK
)
10189 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10190 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10192 return (host_crc
== target_crc
);
10196 return simple_verify_memory (ops
, data
, lma
, size
);
10199 /* compare-sections command
10201 With no arguments, compares each loadable section in the exec bfd
10202 with the same memory range on the target, and reports mismatches.
10203 Useful for verifying the image on the target against the exec file. */
10206 compare_sections_command (const char *args
, int from_tty
)
10209 const char *sectname
;
10210 bfd_size_type size
;
10213 int mismatched
= 0;
10218 error (_("command cannot be used without an exec file"));
10220 /* Make sure the remote is pointing at the right process. */
10221 set_general_process ();
10223 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10229 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10231 if (!(s
->flags
& SEC_LOAD
))
10232 continue; /* Skip non-loadable section. */
10234 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10235 continue; /* Skip writeable sections */
10237 size
= bfd_get_section_size (s
);
10239 continue; /* Skip zero-length section. */
10241 sectname
= bfd_get_section_name (exec_bfd
, s
);
10242 if (args
&& strcmp (args
, sectname
) != 0)
10243 continue; /* Not the section selected by user. */
10245 matched
= 1; /* Do this section. */
10248 gdb::byte_vector
sectdata (size
);
10249 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10251 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10254 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10255 paddress (target_gdbarch (), lma
),
10256 paddress (target_gdbarch (), lma
+ size
));
10258 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10259 paddress (target_gdbarch (), lma
),
10260 paddress (target_gdbarch (), lma
+ size
));
10262 printf_filtered ("matched.\n");
10265 printf_filtered ("MIS-MATCHED!\n");
10269 if (mismatched
> 0)
10270 warning (_("One or more sections of the target image does not match\n\
10271 the loaded file\n"));
10272 if (args
&& !matched
)
10273 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10276 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10277 into remote target. The number of bytes written to the remote
10278 target is returned, or -1 for error. */
10280 static enum target_xfer_status
10281 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
10282 const char *annex
, const gdb_byte
*writebuf
,
10283 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
10284 struct packet_config
*packet
)
10288 struct remote_state
*rs
= get_remote_state ();
10289 int max_size
= get_memory_write_packet_size ();
10291 if (packet_config_support (packet
) == PACKET_DISABLE
)
10292 return TARGET_XFER_E_IO
;
10294 /* Insert header. */
10295 i
= snprintf (rs
->buf
, max_size
,
10296 "qXfer:%s:write:%s:%s:",
10297 object_name
, annex
? annex
: "",
10298 phex_nz (offset
, sizeof offset
));
10299 max_size
-= (i
+ 1);
10301 /* Escape as much data as fits into rs->buf. */
10302 buf_len
= remote_escape_output
10303 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10305 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10306 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10307 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10308 return TARGET_XFER_E_IO
;
10310 unpack_varlen_hex (rs
->buf
, &n
);
10313 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10316 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10317 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10318 number of bytes read is returned, or 0 for EOF, or -1 for error.
10319 The number of bytes read may be less than LEN without indicating an
10320 EOF. PACKET is checked and updated to indicate whether the remote
10321 target supports this object. */
10323 static enum target_xfer_status
10324 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
10326 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
10327 ULONGEST
*xfered_len
,
10328 struct packet_config
*packet
)
10330 struct remote_state
*rs
= get_remote_state ();
10331 LONGEST i
, n
, packet_len
;
10333 if (packet_config_support (packet
) == PACKET_DISABLE
)
10334 return TARGET_XFER_E_IO
;
10336 /* Check whether we've cached an end-of-object packet that matches
10338 if (rs
->finished_object
)
10340 if (strcmp (object_name
, rs
->finished_object
) == 0
10341 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10342 && offset
== rs
->finished_offset
)
10343 return TARGET_XFER_EOF
;
10346 /* Otherwise, we're now reading something different. Discard
10348 xfree (rs
->finished_object
);
10349 xfree (rs
->finished_annex
);
10350 rs
->finished_object
= NULL
;
10351 rs
->finished_annex
= NULL
;
10354 /* Request only enough to fit in a single packet. The actual data
10355 may not, since we don't know how much of it will need to be escaped;
10356 the target is free to respond with slightly less data. We subtract
10357 five to account for the response type and the protocol frame. */
10358 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10359 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10360 object_name
, annex
? annex
: "",
10361 phex_nz (offset
, sizeof offset
),
10362 phex_nz (n
, sizeof n
));
10363 i
= putpkt (rs
->buf
);
10365 return TARGET_XFER_E_IO
;
10368 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10369 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10370 return TARGET_XFER_E_IO
;
10372 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10373 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10375 /* 'm' means there is (or at least might be) more data after this
10376 batch. That does not make sense unless there's at least one byte
10377 of data in this reply. */
10378 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10379 error (_("Remote qXfer reply contained no data."));
10381 /* Got some data. */
10382 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10383 packet_len
- 1, readbuf
, n
);
10385 /* 'l' is an EOF marker, possibly including a final block of data,
10386 or possibly empty. If we have the final block of a non-empty
10387 object, record this fact to bypass a subsequent partial read. */
10388 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10390 rs
->finished_object
= xstrdup (object_name
);
10391 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10392 rs
->finished_offset
= offset
+ i
;
10396 return TARGET_XFER_EOF
;
10400 return TARGET_XFER_OK
;
10404 static enum target_xfer_status
10405 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
10406 const char *annex
, gdb_byte
*readbuf
,
10407 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10408 ULONGEST
*xfered_len
)
10410 struct remote_state
*rs
;
10414 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10416 set_remote_traceframe ();
10417 set_general_thread (inferior_ptid
);
10419 rs
= get_remote_state ();
10421 /* Handle memory using the standard memory routines. */
10422 if (object
== TARGET_OBJECT_MEMORY
)
10424 /* If the remote target is connected but not running, we should
10425 pass this request down to a lower stratum (e.g. the executable
10427 if (!target_has_execution
)
10428 return TARGET_XFER_EOF
;
10430 if (writebuf
!= NULL
)
10431 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10434 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10438 /* Handle SPU memory using qxfer packets. */
10439 if (object
== TARGET_OBJECT_SPU
)
10442 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10443 xfered_len
, &remote_protocol_packets
10444 [PACKET_qXfer_spu_read
]);
10446 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10447 xfered_len
, &remote_protocol_packets
10448 [PACKET_qXfer_spu_write
]);
10451 /* Handle extra signal info using qxfer packets. */
10452 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10455 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10456 xfered_len
, &remote_protocol_packets
10457 [PACKET_qXfer_siginfo_read
]);
10459 return remote_write_qxfer (ops
, "siginfo", annex
,
10460 writebuf
, offset
, len
, xfered_len
,
10461 &remote_protocol_packets
10462 [PACKET_qXfer_siginfo_write
]);
10465 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10468 return remote_read_qxfer (ops
, "statictrace", annex
,
10469 readbuf
, offset
, len
, xfered_len
,
10470 &remote_protocol_packets
10471 [PACKET_qXfer_statictrace_read
]);
10473 return TARGET_XFER_E_IO
;
10476 /* Only handle flash writes. */
10477 if (writebuf
!= NULL
)
10481 case TARGET_OBJECT_FLASH
:
10482 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10486 return TARGET_XFER_E_IO
;
10490 /* Map pre-existing objects onto letters. DO NOT do this for new
10491 objects!!! Instead specify new query packets. */
10494 case TARGET_OBJECT_AVR
:
10498 case TARGET_OBJECT_AUXV
:
10499 gdb_assert (annex
== NULL
);
10500 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10502 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10504 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10505 return remote_read_qxfer
10506 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10507 &remote_protocol_packets
[PACKET_qXfer_features
]);
10509 case TARGET_OBJECT_LIBRARIES
:
10510 return remote_read_qxfer
10511 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10512 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10514 case TARGET_OBJECT_LIBRARIES_SVR4
:
10515 return remote_read_qxfer
10516 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10517 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10519 case TARGET_OBJECT_MEMORY_MAP
:
10520 gdb_assert (annex
== NULL
);
10521 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10523 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10525 case TARGET_OBJECT_OSDATA
:
10526 /* Should only get here if we're connected. */
10527 gdb_assert (rs
->remote_desc
);
10528 return remote_read_qxfer
10529 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10530 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10532 case TARGET_OBJECT_THREADS
:
10533 gdb_assert (annex
== NULL
);
10534 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10536 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10538 case TARGET_OBJECT_TRACEFRAME_INFO
:
10539 gdb_assert (annex
== NULL
);
10540 return remote_read_qxfer
10541 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10542 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10544 case TARGET_OBJECT_FDPIC
:
10545 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10547 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10549 case TARGET_OBJECT_OPENVMS_UIB
:
10550 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10552 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10554 case TARGET_OBJECT_BTRACE
:
10555 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10557 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10559 case TARGET_OBJECT_BTRACE_CONF
:
10560 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10562 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10564 case TARGET_OBJECT_EXEC_FILE
:
10565 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10567 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10570 return TARGET_XFER_E_IO
;
10573 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10574 large enough let the caller deal with it. */
10575 if (len
< get_remote_packet_size ())
10576 return TARGET_XFER_E_IO
;
10577 len
= get_remote_packet_size ();
10579 /* Except for querying the minimum buffer size, target must be open. */
10580 if (!rs
->remote_desc
)
10581 error (_("remote query is only available after target open"));
10583 gdb_assert (annex
!= NULL
);
10584 gdb_assert (readbuf
!= NULL
);
10588 *p2
++ = query_type
;
10590 /* We used one buffer char for the remote protocol q command and
10591 another for the query type. As the remote protocol encapsulation
10592 uses 4 chars plus one extra in case we are debugging
10593 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10596 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10598 /* Bad caller may have sent forbidden characters. */
10599 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10604 gdb_assert (annex
[i
] == '\0');
10606 i
= putpkt (rs
->buf
);
10608 return TARGET_XFER_E_IO
;
10610 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10611 strcpy ((char *) readbuf
, rs
->buf
);
10613 *xfered_len
= strlen ((char *) readbuf
);
10614 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10617 /* Implementation of to_get_memory_xfer_limit. */
10620 remote_get_memory_xfer_limit (struct target_ops
*ops
)
10622 return get_memory_write_packet_size ();
10626 remote_search_memory (struct target_ops
* ops
,
10627 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10628 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10629 CORE_ADDR
*found_addrp
)
10631 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10632 struct remote_state
*rs
= get_remote_state ();
10633 int max_size
= get_memory_write_packet_size ();
10634 struct packet_config
*packet
=
10635 &remote_protocol_packets
[PACKET_qSearch_memory
];
10636 /* Number of packet bytes used to encode the pattern;
10637 this could be more than PATTERN_LEN due to escape characters. */
10638 int escaped_pattern_len
;
10639 /* Amount of pattern that was encodable in the packet. */
10640 int used_pattern_len
;
10643 ULONGEST found_addr
;
10645 /* Don't go to the target if we don't have to. This is done before
10646 checking packet_config_support to avoid the possibility that a
10647 success for this edge case means the facility works in
10649 if (pattern_len
> search_space_len
)
10651 if (pattern_len
== 0)
10653 *found_addrp
= start_addr
;
10657 /* If we already know the packet isn't supported, fall back to the simple
10658 way of searching memory. */
10660 if (packet_config_support (packet
) == PACKET_DISABLE
)
10662 /* Target doesn't provided special support, fall back and use the
10663 standard support (copy memory and do the search here). */
10664 return simple_search_memory (ops
, start_addr
, search_space_len
,
10665 pattern
, pattern_len
, found_addrp
);
10668 /* Make sure the remote is pointing at the right process. */
10669 set_general_process ();
10671 /* Insert header. */
10672 i
= snprintf (rs
->buf
, max_size
,
10673 "qSearch:memory:%s;%s;",
10674 phex_nz (start_addr
, addr_size
),
10675 phex_nz (search_space_len
, sizeof (search_space_len
)));
10676 max_size
-= (i
+ 1);
10678 /* Escape as much data as fits into rs->buf. */
10679 escaped_pattern_len
=
10680 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10681 &used_pattern_len
, max_size
);
10683 /* Bail if the pattern is too large. */
10684 if (used_pattern_len
!= pattern_len
)
10685 error (_("Pattern is too large to transmit to remote target."));
10687 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10688 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10689 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10691 /* The request may not have worked because the command is not
10692 supported. If so, fall back to the simple way. */
10693 if (packet_config_support (packet
) == PACKET_DISABLE
)
10695 return simple_search_memory (ops
, start_addr
, search_space_len
,
10696 pattern
, pattern_len
, found_addrp
);
10701 if (rs
->buf
[0] == '0')
10703 else if (rs
->buf
[0] == '1')
10706 if (rs
->buf
[1] != ',')
10707 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10708 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10709 *found_addrp
= found_addr
;
10712 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10718 remote_rcmd (struct target_ops
*self
, const char *command
,
10719 struct ui_file
*outbuf
)
10721 struct remote_state
*rs
= get_remote_state ();
10724 if (!rs
->remote_desc
)
10725 error (_("remote rcmd is only available after target open"));
10727 /* Send a NULL command across as an empty command. */
10728 if (command
== NULL
)
10731 /* The query prefix. */
10732 strcpy (rs
->buf
, "qRcmd,");
10733 p
= strchr (rs
->buf
, '\0');
10735 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10736 > get_remote_packet_size ())
10737 error (_("\"monitor\" command ``%s'' is too long."), command
);
10739 /* Encode the actual command. */
10740 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10742 if (putpkt (rs
->buf
) < 0)
10743 error (_("Communication problem with target."));
10745 /* get/display the response */
10750 /* XXX - see also remote_get_noisy_reply(). */
10751 QUIT
; /* Allow user to bail out with ^C. */
10753 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10755 /* Timeout. Continue to (try to) read responses.
10756 This is better than stopping with an error, assuming the stub
10757 is still executing the (long) monitor command.
10758 If needed, the user can interrupt gdb using C-c, obtaining
10759 an effect similar to stop on timeout. */
10763 if (buf
[0] == '\0')
10764 error (_("Target does not support this command."));
10765 if (buf
[0] == 'O' && buf
[1] != 'K')
10767 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10770 if (strcmp (buf
, "OK") == 0)
10772 if (strlen (buf
) == 3 && buf
[0] == 'E'
10773 && isdigit (buf
[1]) && isdigit (buf
[2]))
10775 error (_("Protocol error with Rcmd"));
10777 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10779 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10781 fputc_unfiltered (c
, outbuf
);
10787 static std::vector
<mem_region
>
10788 remote_memory_map (struct target_ops
*ops
)
10790 std::vector
<mem_region
> result
;
10791 gdb::optional
<gdb::char_vector
> text
10792 = target_read_stralloc (¤t_target
, TARGET_OBJECT_MEMORY_MAP
, NULL
);
10795 result
= parse_memory_map (text
->data ());
10801 packet_command (const char *args
, int from_tty
)
10803 struct remote_state
*rs
= get_remote_state ();
10805 if (!rs
->remote_desc
)
10806 error (_("command can only be used with remote target"));
10809 error (_("remote-packet command requires packet text as argument"));
10811 puts_filtered ("sending: ");
10812 print_packet (args
);
10813 puts_filtered ("\n");
10816 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10817 puts_filtered ("received: ");
10818 print_packet (rs
->buf
);
10819 puts_filtered ("\n");
10823 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10825 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10827 static void threadset_test_cmd (char *cmd
, int tty
);
10829 static void threadalive_test (char *cmd
, int tty
);
10831 static void threadlist_test_cmd (char *cmd
, int tty
);
10833 int get_and_display_threadinfo (threadref
*ref
);
10835 static void threadinfo_test_cmd (char *cmd
, int tty
);
10837 static int thread_display_step (threadref
*ref
, void *context
);
10839 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10841 static void init_remote_threadtests (void);
10843 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10846 threadset_test_cmd (const char *cmd
, int tty
)
10848 int sample_thread
= SAMPLE_THREAD
;
10850 printf_filtered (_("Remote threadset test\n"));
10851 set_general_thread (sample_thread
);
10856 threadalive_test (const char *cmd
, int tty
)
10858 int sample_thread
= SAMPLE_THREAD
;
10859 int pid
= ptid_get_pid (inferior_ptid
);
10860 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10862 if (remote_thread_alive (ptid
))
10863 printf_filtered ("PASS: Thread alive test\n");
10865 printf_filtered ("FAIL: Thread alive test\n");
10868 void output_threadid (char *title
, threadref
*ref
);
10871 output_threadid (char *title
, threadref
*ref
)
10875 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10877 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10881 threadlist_test_cmd (const char *cmd
, int tty
)
10884 threadref nextthread
;
10885 int done
, result_count
;
10886 threadref threadlist
[3];
10888 printf_filtered ("Remote Threadlist test\n");
10889 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10890 &result_count
, &threadlist
[0]))
10891 printf_filtered ("FAIL: threadlist test\n");
10894 threadref
*scan
= threadlist
;
10895 threadref
*limit
= scan
+ result_count
;
10897 while (scan
< limit
)
10898 output_threadid (" thread ", scan
++);
10903 display_thread_info (struct gdb_ext_thread_info
*info
)
10905 output_threadid ("Threadid: ", &info
->threadid
);
10906 printf_filtered ("Name: %s\n ", info
->shortname
);
10907 printf_filtered ("State: %s\n", info
->display
);
10908 printf_filtered ("other: %s\n\n", info
->more_display
);
10912 get_and_display_threadinfo (threadref
*ref
)
10916 struct gdb_ext_thread_info threadinfo
;
10918 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
10919 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
10920 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
10921 display_thread_info (&threadinfo
);
10926 threadinfo_test_cmd (const char *cmd
, int tty
)
10928 int athread
= SAMPLE_THREAD
;
10932 int_to_threadref (&thread
, athread
);
10933 printf_filtered ("Remote Threadinfo test\n");
10934 if (!get_and_display_threadinfo (&thread
))
10935 printf_filtered ("FAIL cannot get thread info\n");
10939 thread_display_step (threadref
*ref
, void *context
)
10941 /* output_threadid(" threadstep ",ref); *//* simple test */
10942 return get_and_display_threadinfo (ref
);
10946 threadlist_update_test_cmd (const char *cmd
, int tty
)
10948 printf_filtered ("Remote Threadlist update test\n");
10949 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
10953 init_remote_threadtests (void)
10955 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
10956 _("Fetch and print the remote list of "
10957 "thread identifiers, one pkt only"));
10958 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
10959 _("Fetch and display info about one thread"));
10960 add_com ("tset", class_obscure
, threadset_test_cmd
,
10961 _("Test setting to a different thread"));
10962 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
10963 _("Iterate through updating all remote thread info"));
10964 add_com ("talive", class_obscure
, threadalive_test
,
10965 _(" Remote thread alive test "));
10970 /* Convert a thread ID to a string. Returns the string in a static
10973 static const char *
10974 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
10976 static char buf
[64];
10977 struct remote_state
*rs
= get_remote_state ();
10979 if (ptid_equal (ptid
, null_ptid
))
10980 return normal_pid_to_str (ptid
);
10981 else if (ptid_is_pid (ptid
))
10983 /* Printing an inferior target id. */
10985 /* When multi-process extensions are off, there's no way in the
10986 remote protocol to know the remote process id, if there's any
10987 at all. There's one exception --- when we're connected with
10988 target extended-remote, and we manually attached to a process
10989 with "attach PID". We don't record anywhere a flag that
10990 allows us to distinguish that case from the case of
10991 connecting with extended-remote and the stub already being
10992 attached to a process, and reporting yes to qAttached, hence
10993 no smart special casing here. */
10994 if (!remote_multi_process_p (rs
))
10996 xsnprintf (buf
, sizeof buf
, "Remote target");
11000 return normal_pid_to_str (ptid
);
11004 if (ptid_equal (magic_null_ptid
, ptid
))
11005 xsnprintf (buf
, sizeof buf
, "Thread <main>");
11006 else if (remote_multi_process_p (rs
))
11007 if (ptid_get_lwp (ptid
) == 0)
11008 return normal_pid_to_str (ptid
);
11010 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
11011 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
11013 xsnprintf (buf
, sizeof buf
, "Thread %ld",
11014 ptid_get_lwp (ptid
));
11019 /* Get the address of the thread local variable in OBJFILE which is
11020 stored at OFFSET within the thread local storage for thread PTID. */
11023 remote_get_thread_local_address (struct target_ops
*ops
,
11024 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
11026 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11028 struct remote_state
*rs
= get_remote_state ();
11030 char *endp
= rs
->buf
+ get_remote_packet_size ();
11031 enum packet_result result
;
11033 strcpy (p
, "qGetTLSAddr:");
11035 p
= write_ptid (p
, endp
, ptid
);
11037 p
+= hexnumstr (p
, offset
);
11039 p
+= hexnumstr (p
, lm
);
11043 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11044 result
= packet_ok (rs
->buf
,
11045 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11046 if (result
== PACKET_OK
)
11050 unpack_varlen_hex (rs
->buf
, &result
);
11053 else if (result
== PACKET_UNKNOWN
)
11054 throw_error (TLS_GENERIC_ERROR
,
11055 _("Remote target doesn't support qGetTLSAddr packet"));
11057 throw_error (TLS_GENERIC_ERROR
,
11058 _("Remote target failed to process qGetTLSAddr request"));
11061 throw_error (TLS_GENERIC_ERROR
,
11062 _("TLS not supported or disabled on this target"));
11067 /* Provide thread local base, i.e. Thread Information Block address.
11068 Returns 1 if ptid is found and thread_local_base is non zero. */
11071 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
11073 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11075 struct remote_state
*rs
= get_remote_state ();
11077 char *endp
= rs
->buf
+ get_remote_packet_size ();
11078 enum packet_result result
;
11080 strcpy (p
, "qGetTIBAddr:");
11082 p
= write_ptid (p
, endp
, ptid
);
11086 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11087 result
= packet_ok (rs
->buf
,
11088 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11089 if (result
== PACKET_OK
)
11093 unpack_varlen_hex (rs
->buf
, &result
);
11095 *addr
= (CORE_ADDR
) result
;
11098 else if (result
== PACKET_UNKNOWN
)
11099 error (_("Remote target doesn't support qGetTIBAddr packet"));
11101 error (_("Remote target failed to process qGetTIBAddr request"));
11104 error (_("qGetTIBAddr not supported or disabled on this target"));
11109 /* Support for inferring a target description based on the current
11110 architecture and the size of a 'g' packet. While the 'g' packet
11111 can have any size (since optional registers can be left off the
11112 end), some sizes are easily recognizable given knowledge of the
11113 approximate architecture. */
11115 struct remote_g_packet_guess
11118 const struct target_desc
*tdesc
;
11120 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
11121 DEF_VEC_O(remote_g_packet_guess_s
);
11123 struct remote_g_packet_data
11125 VEC(remote_g_packet_guess_s
) *guesses
;
11128 static struct gdbarch_data
*remote_g_packet_data_handle
;
11131 remote_g_packet_data_init (struct obstack
*obstack
)
11133 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
11137 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11138 const struct target_desc
*tdesc
)
11140 struct remote_g_packet_data
*data
11141 = ((struct remote_g_packet_data
*)
11142 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11143 struct remote_g_packet_guess new_guess
, *guess
;
11146 gdb_assert (tdesc
!= NULL
);
11149 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11151 if (guess
->bytes
== bytes
)
11152 internal_error (__FILE__
, __LINE__
,
11153 _("Duplicate g packet description added for size %d"),
11156 new_guess
.bytes
= bytes
;
11157 new_guess
.tdesc
= tdesc
;
11158 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
11161 /* Return 1 if remote_read_description would do anything on this target
11162 and architecture, 0 otherwise. */
11165 remote_read_description_p (struct target_ops
*target
)
11167 struct remote_g_packet_data
*data
11168 = ((struct remote_g_packet_data
*)
11169 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11171 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11177 static const struct target_desc
*
11178 remote_read_description (struct target_ops
*target
)
11180 struct remote_g_packet_data
*data
11181 = ((struct remote_g_packet_data
*)
11182 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11184 /* Do not try this during initial connection, when we do not know
11185 whether there is a running but stopped thread. */
11186 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
11187 return target
->beneath
->to_read_description (target
->beneath
);
11189 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11191 struct remote_g_packet_guess
*guess
;
11193 int bytes
= send_g_packet ();
11196 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11198 if (guess
->bytes
== bytes
)
11199 return guess
->tdesc
;
11201 /* We discard the g packet. A minor optimization would be to
11202 hold on to it, and fill the register cache once we have selected
11203 an architecture, but it's too tricky to do safely. */
11206 return target
->beneath
->to_read_description (target
->beneath
);
11209 /* Remote file transfer support. This is host-initiated I/O, not
11210 target-initiated; for target-initiated, see remote-fileio.c. */
11212 /* If *LEFT is at least the length of STRING, copy STRING to
11213 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11214 decrease *LEFT. Otherwise raise an error. */
11217 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11219 int len
= strlen (string
);
11222 error (_("Packet too long for target."));
11224 memcpy (*buffer
, string
, len
);
11228 /* NUL-terminate the buffer as a convenience, if there is
11234 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11235 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11236 decrease *LEFT. Otherwise raise an error. */
11239 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11242 if (2 * len
> *left
)
11243 error (_("Packet too long for target."));
11245 bin2hex (bytes
, *buffer
, len
);
11246 *buffer
+= 2 * len
;
11249 /* NUL-terminate the buffer as a convenience, if there is
11255 /* If *LEFT is large enough, convert VALUE to hex and add it to
11256 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11257 decrease *LEFT. Otherwise raise an error. */
11260 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11262 int len
= hexnumlen (value
);
11265 error (_("Packet too long for target."));
11267 hexnumstr (*buffer
, value
);
11271 /* NUL-terminate the buffer as a convenience, if there is
11277 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11278 value, *REMOTE_ERRNO to the remote error number or zero if none
11279 was included, and *ATTACHMENT to point to the start of the annex
11280 if any. The length of the packet isn't needed here; there may
11281 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11283 Return 0 if the packet could be parsed, -1 if it could not. If
11284 -1 is returned, the other variables may not be initialized. */
11287 remote_hostio_parse_result (char *buffer
, int *retcode
,
11288 int *remote_errno
, char **attachment
)
11293 *attachment
= NULL
;
11295 if (buffer
[0] != 'F')
11299 *retcode
= strtol (&buffer
[1], &p
, 16);
11300 if (errno
!= 0 || p
== &buffer
[1])
11303 /* Check for ",errno". */
11307 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11308 if (errno
!= 0 || p
+ 1 == p2
)
11313 /* Check for ";attachment". If there is no attachment, the
11314 packet should end here. */
11317 *attachment
= p
+ 1;
11320 else if (*p
== '\0')
11326 /* Send a prepared I/O packet to the target and read its response.
11327 The prepared packet is in the global RS->BUF before this function
11328 is called, and the answer is there when we return.
11330 COMMAND_BYTES is the length of the request to send, which may include
11331 binary data. WHICH_PACKET is the packet configuration to check
11332 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11333 is set to the error number and -1 is returned. Otherwise the value
11334 returned by the function is returned.
11336 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11337 attachment is expected; an error will be reported if there's a
11338 mismatch. If one is found, *ATTACHMENT will be set to point into
11339 the packet buffer and *ATTACHMENT_LEN will be set to the
11340 attachment's length. */
11343 remote_hostio_send_command (int command_bytes
, int which_packet
,
11344 int *remote_errno
, char **attachment
,
11345 int *attachment_len
)
11347 struct remote_state
*rs
= get_remote_state ();
11348 int ret
, bytes_read
;
11349 char *attachment_tmp
;
11351 if (packet_support (which_packet
) == PACKET_DISABLE
)
11353 *remote_errno
= FILEIO_ENOSYS
;
11357 putpkt_binary (rs
->buf
, command_bytes
);
11358 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11360 /* If it timed out, something is wrong. Don't try to parse the
11362 if (bytes_read
< 0)
11364 *remote_errno
= FILEIO_EINVAL
;
11368 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11371 *remote_errno
= FILEIO_EINVAL
;
11373 case PACKET_UNKNOWN
:
11374 *remote_errno
= FILEIO_ENOSYS
;
11380 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11383 *remote_errno
= FILEIO_EINVAL
;
11387 /* Make sure we saw an attachment if and only if we expected one. */
11388 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11389 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11391 *remote_errno
= FILEIO_EINVAL
;
11395 /* If an attachment was found, it must point into the packet buffer;
11396 work out how many bytes there were. */
11397 if (attachment_tmp
!= NULL
)
11399 *attachment
= attachment_tmp
;
11400 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11406 /* Invalidate the readahead cache. */
11409 readahead_cache_invalidate (void)
11411 struct remote_state
*rs
= get_remote_state ();
11413 rs
->readahead_cache
.fd
= -1;
11416 /* Invalidate the readahead cache if it is holding data for FD. */
11419 readahead_cache_invalidate_fd (int fd
)
11421 struct remote_state
*rs
= get_remote_state ();
11423 if (rs
->readahead_cache
.fd
== fd
)
11424 rs
->readahead_cache
.fd
= -1;
11427 /* Set the filesystem remote_hostio functions that take FILENAME
11428 arguments will use. Return 0 on success, or -1 if an error
11429 occurs (and set *REMOTE_ERRNO). */
11432 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11434 struct remote_state
*rs
= get_remote_state ();
11435 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11437 int left
= get_remote_packet_size () - 1;
11441 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11444 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11447 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11449 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11450 remote_buffer_add_string (&p
, &left
, arg
);
11452 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11453 remote_errno
, NULL
, NULL
);
11455 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11459 rs
->fs_pid
= required_pid
;
11464 /* Implementation of to_fileio_open. */
11467 remote_hostio_open (struct target_ops
*self
,
11468 struct inferior
*inf
, const char *filename
,
11469 int flags
, int mode
, int warn_if_slow
,
11472 struct remote_state
*rs
= get_remote_state ();
11474 int left
= get_remote_packet_size () - 1;
11478 static int warning_issued
= 0;
11480 printf_unfiltered (_("Reading %s from remote target...\n"),
11483 if (!warning_issued
)
11485 warning (_("File transfers from remote targets can be slow."
11486 " Use \"set sysroot\" to access files locally"
11488 warning_issued
= 1;
11492 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11495 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11497 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11498 strlen (filename
));
11499 remote_buffer_add_string (&p
, &left
, ",");
11501 remote_buffer_add_int (&p
, &left
, flags
);
11502 remote_buffer_add_string (&p
, &left
, ",");
11504 remote_buffer_add_int (&p
, &left
, mode
);
11506 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11507 remote_errno
, NULL
, NULL
);
11510 /* Implementation of to_fileio_pwrite. */
11513 remote_hostio_pwrite (struct target_ops
*self
,
11514 int fd
, const gdb_byte
*write_buf
, int len
,
11515 ULONGEST offset
, int *remote_errno
)
11517 struct remote_state
*rs
= get_remote_state ();
11519 int left
= get_remote_packet_size ();
11522 readahead_cache_invalidate_fd (fd
);
11524 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11526 remote_buffer_add_int (&p
, &left
, fd
);
11527 remote_buffer_add_string (&p
, &left
, ",");
11529 remote_buffer_add_int (&p
, &left
, offset
);
11530 remote_buffer_add_string (&p
, &left
, ",");
11532 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11533 get_remote_packet_size () - (p
- rs
->buf
));
11535 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11536 remote_errno
, NULL
, NULL
);
11539 /* Helper for the implementation of to_fileio_pread. Read the file
11540 from the remote side with vFile:pread. */
11543 remote_hostio_pread_vFile (struct target_ops
*self
,
11544 int fd
, gdb_byte
*read_buf
, int len
,
11545 ULONGEST offset
, int *remote_errno
)
11547 struct remote_state
*rs
= get_remote_state ();
11550 int left
= get_remote_packet_size ();
11551 int ret
, attachment_len
;
11554 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11556 remote_buffer_add_int (&p
, &left
, fd
);
11557 remote_buffer_add_string (&p
, &left
, ",");
11559 remote_buffer_add_int (&p
, &left
, len
);
11560 remote_buffer_add_string (&p
, &left
, ",");
11562 remote_buffer_add_int (&p
, &left
, offset
);
11564 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11565 remote_errno
, &attachment
,
11571 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11573 if (read_len
!= ret
)
11574 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11579 /* Serve pread from the readahead cache. Returns number of bytes
11580 read, or 0 if the request can't be served from the cache. */
11583 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11584 int fd
, gdb_byte
*read_buf
, size_t len
,
11587 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11589 if (cache
->fd
== fd
11590 && cache
->offset
<= offset
11591 && offset
< cache
->offset
+ cache
->bufsize
)
11593 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11595 if (offset
+ len
> max
)
11596 len
= max
- offset
;
11598 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11605 /* Implementation of to_fileio_pread. */
11608 remote_hostio_pread (struct target_ops
*self
,
11609 int fd
, gdb_byte
*read_buf
, int len
,
11610 ULONGEST offset
, int *remote_errno
)
11613 struct remote_state
*rs
= get_remote_state ();
11614 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11616 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11619 cache
->hit_count
++;
11622 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11623 pulongest (cache
->hit_count
));
11627 cache
->miss_count
++;
11629 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11630 pulongest (cache
->miss_count
));
11633 cache
->offset
= offset
;
11634 cache
->bufsize
= get_remote_packet_size ();
11635 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11637 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11638 cache
->offset
, remote_errno
);
11641 readahead_cache_invalidate_fd (fd
);
11645 cache
->bufsize
= ret
;
11646 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11649 /* Implementation of to_fileio_close. */
11652 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11654 struct remote_state
*rs
= get_remote_state ();
11656 int left
= get_remote_packet_size () - 1;
11658 readahead_cache_invalidate_fd (fd
);
11660 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11662 remote_buffer_add_int (&p
, &left
, fd
);
11664 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11665 remote_errno
, NULL
, NULL
);
11668 /* Implementation of to_fileio_unlink. */
11671 remote_hostio_unlink (struct target_ops
*self
,
11672 struct inferior
*inf
, const char *filename
,
11675 struct remote_state
*rs
= get_remote_state ();
11677 int left
= get_remote_packet_size () - 1;
11679 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11682 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11684 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11685 strlen (filename
));
11687 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11688 remote_errno
, NULL
, NULL
);
11691 /* Implementation of to_fileio_readlink. */
11693 static gdb::optional
<std::string
>
11694 remote_hostio_readlink (struct target_ops
*self
,
11695 struct inferior
*inf
, const char *filename
,
11698 struct remote_state
*rs
= get_remote_state ();
11701 int left
= get_remote_packet_size ();
11702 int len
, attachment_len
;
11705 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11708 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11710 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11711 strlen (filename
));
11713 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11714 remote_errno
, &attachment
,
11720 std::string
ret (len
, '\0');
11722 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11723 (gdb_byte
*) &ret
[0], len
);
11724 if (read_len
!= len
)
11725 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11730 /* Implementation of to_fileio_fstat. */
11733 remote_hostio_fstat (struct target_ops
*self
,
11734 int fd
, struct stat
*st
,
11737 struct remote_state
*rs
= get_remote_state ();
11739 int left
= get_remote_packet_size ();
11740 int attachment_len
, ret
;
11742 struct fio_stat fst
;
11745 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11747 remote_buffer_add_int (&p
, &left
, fd
);
11749 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11750 remote_errno
, &attachment
,
11754 if (*remote_errno
!= FILEIO_ENOSYS
)
11757 /* Strictly we should return -1, ENOSYS here, but when
11758 "set sysroot remote:" was implemented in August 2008
11759 BFD's need for a stat function was sidestepped with
11760 this hack. This was not remedied until March 2015
11761 so we retain the previous behavior to avoid breaking
11764 Note that the memset is a March 2015 addition; older
11765 GDBs set st_size *and nothing else* so the structure
11766 would have garbage in all other fields. This might
11767 break something but retaining the previous behavior
11768 here would be just too wrong. */
11770 memset (st
, 0, sizeof (struct stat
));
11771 st
->st_size
= INT_MAX
;
11775 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11776 (gdb_byte
*) &fst
, sizeof (fst
));
11778 if (read_len
!= ret
)
11779 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11781 if (read_len
!= sizeof (fst
))
11782 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11783 read_len
, (int) sizeof (fst
));
11785 remote_fileio_to_host_stat (&fst
, st
);
11790 /* Implementation of to_filesystem_is_local. */
11793 remote_filesystem_is_local (struct target_ops
*self
)
11795 /* Valgrind GDB presents itself as a remote target but works
11796 on the local filesystem: it does not implement remote get
11797 and users are not expected to set a sysroot. To handle
11798 this case we treat the remote filesystem as local if the
11799 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11800 does not support vFile:open. */
11801 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11803 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11805 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11807 int fd
, remote_errno
;
11809 /* Try opening a file to probe support. The supplied
11810 filename is irrelevant, we only care about whether
11811 the stub recognizes the packet or not. */
11812 fd
= remote_hostio_open (self
, NULL
, "just probing",
11813 FILEIO_O_RDONLY
, 0700, 0,
11817 remote_hostio_close (self
, fd
, &remote_errno
);
11819 ps
= packet_support (PACKET_vFile_open
);
11822 if (ps
== PACKET_DISABLE
)
11824 static int warning_issued
= 0;
11826 if (!warning_issued
)
11828 warning (_("remote target does not support file"
11829 " transfer, attempting to access files"
11830 " from local filesystem."));
11831 warning_issued
= 1;
11842 remote_fileio_errno_to_host (int errnum
)
11848 case FILEIO_ENOENT
:
11856 case FILEIO_EACCES
:
11858 case FILEIO_EFAULT
:
11862 case FILEIO_EEXIST
:
11864 case FILEIO_ENODEV
:
11866 case FILEIO_ENOTDIR
:
11868 case FILEIO_EISDIR
:
11870 case FILEIO_EINVAL
:
11872 case FILEIO_ENFILE
:
11874 case FILEIO_EMFILE
:
11878 case FILEIO_ENOSPC
:
11880 case FILEIO_ESPIPE
:
11884 case FILEIO_ENOSYS
:
11886 case FILEIO_ENAMETOOLONG
:
11887 return ENAMETOOLONG
;
11893 remote_hostio_error (int errnum
)
11895 int host_error
= remote_fileio_errno_to_host (errnum
);
11897 if (host_error
== -1)
11898 error (_("Unknown remote I/O error %d"), errnum
);
11900 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11904 remote_hostio_close_cleanup (void *opaque
)
11906 int fd
= *(int *) opaque
;
11909 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
11913 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
11915 struct cleanup
*back_to
, *close_cleanup
;
11916 int retcode
, fd
, remote_errno
, bytes
, io_size
;
11918 int bytes_in_buffer
;
11921 struct remote_state
*rs
= get_remote_state ();
11923 if (!rs
->remote_desc
)
11924 error (_("command can only be used with remote target"));
11926 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
11928 perror_with_name (local_file
);
11930 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11931 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
11933 0700, 0, &remote_errno
);
11935 remote_hostio_error (remote_errno
);
11937 /* Send up to this many bytes at once. They won't all fit in the
11938 remote packet limit, so we'll transfer slightly fewer. */
11939 io_size
= get_remote_packet_size ();
11940 buffer
= (gdb_byte
*) xmalloc (io_size
);
11941 back_to
= make_cleanup (xfree
, buffer
);
11943 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11945 bytes_in_buffer
= 0;
11948 while (bytes_in_buffer
|| !saw_eof
)
11952 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
11953 io_size
- bytes_in_buffer
,
11957 if (ferror (file
.get ()))
11958 error (_("Error reading %s."), local_file
);
11961 /* EOF. Unless there is something still in the
11962 buffer from the last iteration, we are done. */
11964 if (bytes_in_buffer
== 0)
11972 bytes
+= bytes_in_buffer
;
11973 bytes_in_buffer
= 0;
11975 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
11977 offset
, &remote_errno
);
11980 remote_hostio_error (remote_errno
);
11981 else if (retcode
== 0)
11982 error (_("Remote write of %d bytes returned 0!"), bytes
);
11983 else if (retcode
< bytes
)
11985 /* Short write. Save the rest of the read data for the next
11987 bytes_in_buffer
= bytes
- retcode
;
11988 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
11994 discard_cleanups (close_cleanup
);
11995 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
11996 remote_hostio_error (remote_errno
);
11999 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12000 do_cleanups (back_to
);
12004 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12006 struct cleanup
*back_to
, *close_cleanup
;
12007 int fd
, remote_errno
, bytes
, io_size
;
12010 struct remote_state
*rs
= get_remote_state ();
12012 if (!rs
->remote_desc
)
12013 error (_("command can only be used with remote target"));
12015 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12016 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12019 remote_hostio_error (remote_errno
);
12021 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12023 perror_with_name (local_file
);
12025 /* Send up to this many bytes at once. They won't all fit in the
12026 remote packet limit, so we'll transfer slightly fewer. */
12027 io_size
= get_remote_packet_size ();
12028 buffer
= (gdb_byte
*) xmalloc (io_size
);
12029 back_to
= make_cleanup (xfree
, buffer
);
12031 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12036 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
12037 fd
, buffer
, io_size
, offset
, &remote_errno
);
12039 /* Success, but no bytes, means end-of-file. */
12042 remote_hostio_error (remote_errno
);
12046 bytes
= fwrite (buffer
, 1, bytes
, file
.get ());
12048 perror_with_name (local_file
);
12051 discard_cleanups (close_cleanup
);
12052 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12053 remote_hostio_error (remote_errno
);
12056 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12057 do_cleanups (back_to
);
12061 remote_file_delete (const char *remote_file
, int from_tty
)
12063 int retcode
, remote_errno
;
12064 struct remote_state
*rs
= get_remote_state ();
12066 if (!rs
->remote_desc
)
12067 error (_("command can only be used with remote target"));
12069 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
12070 NULL
, remote_file
, &remote_errno
);
12072 remote_hostio_error (remote_errno
);
12075 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12079 remote_put_command (const char *args
, int from_tty
)
12082 error_no_arg (_("file to put"));
12084 gdb_argv
argv (args
);
12085 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12086 error (_("Invalid parameters to remote put"));
12088 remote_file_put (argv
[0], argv
[1], from_tty
);
12092 remote_get_command (const char *args
, int from_tty
)
12095 error_no_arg (_("file to get"));
12097 gdb_argv
argv (args
);
12098 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12099 error (_("Invalid parameters to remote get"));
12101 remote_file_get (argv
[0], argv
[1], from_tty
);
12105 remote_delete_command (const char *args
, int from_tty
)
12108 error_no_arg (_("file to delete"));
12110 gdb_argv
argv (args
);
12111 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12112 error (_("Invalid parameters to remote delete"));
12114 remote_file_delete (argv
[0], from_tty
);
12118 remote_command (const char *args
, int from_tty
)
12120 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12124 remote_can_execute_reverse (struct target_ops
*self
)
12126 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12127 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12134 remote_supports_non_stop (struct target_ops
*self
)
12140 remote_supports_disable_randomization (struct target_ops
*self
)
12142 /* Only supported in extended mode. */
12147 remote_supports_multi_process (struct target_ops
*self
)
12149 struct remote_state
*rs
= get_remote_state ();
12151 return remote_multi_process_p (rs
);
12155 remote_supports_cond_tracepoints (void)
12157 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12161 remote_supports_cond_breakpoints (struct target_ops
*self
)
12163 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12167 remote_supports_fast_tracepoints (void)
12169 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12173 remote_supports_static_tracepoints (void)
12175 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12179 remote_supports_install_in_trace (void)
12181 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12185 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
12187 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12192 remote_supports_string_tracing (struct target_ops
*self
)
12194 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12198 remote_can_run_breakpoint_commands (struct target_ops
*self
)
12200 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12204 remote_trace_init (struct target_ops
*self
)
12206 struct remote_state
*rs
= get_remote_state ();
12209 remote_get_noisy_reply ();
12210 if (strcmp (rs
->buf
, "OK") != 0)
12211 error (_("Target does not support this command."));
12214 /* Recursive routine to walk through command list including loops, and
12215 download packets for each command. */
12218 remote_download_command_source (int num
, ULONGEST addr
,
12219 struct command_line
*cmds
)
12221 struct remote_state
*rs
= get_remote_state ();
12222 struct command_line
*cmd
;
12224 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12226 QUIT
; /* Allow user to bail out with ^C. */
12227 strcpy (rs
->buf
, "QTDPsrc:");
12228 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12229 rs
->buf
+ strlen (rs
->buf
),
12230 rs
->buf_size
- strlen (rs
->buf
));
12232 remote_get_noisy_reply ();
12233 if (strcmp (rs
->buf
, "OK"))
12234 warning (_("Target does not support source download."));
12236 if (cmd
->control_type
== while_control
12237 || cmd
->control_type
== while_stepping_control
)
12239 remote_download_command_source (num
, addr
, *cmd
->body_list
);
12241 QUIT
; /* Allow user to bail out with ^C. */
12242 strcpy (rs
->buf
, "QTDPsrc:");
12243 encode_source_string (num
, addr
, "cmd", "end",
12244 rs
->buf
+ strlen (rs
->buf
),
12245 rs
->buf_size
- strlen (rs
->buf
));
12247 remote_get_noisy_reply ();
12248 if (strcmp (rs
->buf
, "OK"))
12249 warning (_("Target does not support source download."));
12255 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
12257 #define BUF_SIZE 2048
12261 char buf
[BUF_SIZE
];
12262 std::vector
<std::string
> tdp_actions
;
12263 std::vector
<std::string
> stepping_actions
;
12265 struct breakpoint
*b
= loc
->owner
;
12266 struct tracepoint
*t
= (struct tracepoint
*) b
;
12267 struct remote_state
*rs
= get_remote_state ();
12269 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12271 tpaddr
= loc
->address
;
12272 sprintf_vma (addrbuf
, tpaddr
);
12273 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
12274 addrbuf
, /* address */
12275 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12276 t
->step_count
, t
->pass_count
);
12277 /* Fast tracepoints are mostly handled by the target, but we can
12278 tell the target how big of an instruction block should be moved
12280 if (b
->type
== bp_fast_tracepoint
)
12282 /* Only test for support at download time; we may not know
12283 target capabilities at definition time. */
12284 if (remote_supports_fast_tracepoints ())
12286 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12288 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
12289 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12291 /* If it passed validation at definition but fails now,
12292 something is very wrong. */
12293 internal_error (__FILE__
, __LINE__
,
12294 _("Fast tracepoint not "
12295 "valid during download"));
12298 /* Fast tracepoints are functionally identical to regular
12299 tracepoints, so don't take lack of support as a reason to
12300 give up on the trace run. */
12301 warning (_("Target does not support fast tracepoints, "
12302 "downloading %d as regular tracepoint"), b
->number
);
12304 else if (b
->type
== bp_static_tracepoint
)
12306 /* Only test for support at download time; we may not know
12307 target capabilities at definition time. */
12308 if (remote_supports_static_tracepoints ())
12310 struct static_tracepoint_marker marker
;
12312 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12313 strcat (buf
, ":S");
12315 error (_("Static tracepoint not valid during download"));
12318 /* Fast tracepoints are functionally identical to regular
12319 tracepoints, so don't take lack of support as a reason
12320 to give up on the trace run. */
12321 error (_("Target does not support static tracepoints"));
12323 /* If the tracepoint has a conditional, make it into an agent
12324 expression and append to the definition. */
12327 /* Only test support at download time, we may not know target
12328 capabilities at definition time. */
12329 if (remote_supports_cond_tracepoints ())
12331 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
.get ());
12332 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
12334 pkt
= buf
+ strlen (buf
);
12335 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12336 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12340 warning (_("Target does not support conditional tracepoints, "
12341 "ignoring tp %d cond"), b
->number
);
12344 if (b
->commands
|| *default_collect
)
12347 remote_get_noisy_reply ();
12348 if (strcmp (rs
->buf
, "OK"))
12349 error (_("Target does not support tracepoints."));
12351 /* do_single_steps (t); */
12352 for (auto action_it
= tdp_actions
.begin ();
12353 action_it
!= tdp_actions
.end (); action_it
++)
12355 QUIT
; /* Allow user to bail out with ^C. */
12357 bool has_more
= (action_it
!= tdp_actions
.end ()
12358 || !stepping_actions
.empty ());
12360 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
12361 b
->number
, addrbuf
, /* address */
12362 action_it
->c_str (),
12363 has_more
? '-' : 0);
12365 remote_get_noisy_reply ();
12366 if (strcmp (rs
->buf
, "OK"))
12367 error (_("Error on target while setting tracepoints."));
12370 for (auto action_it
= stepping_actions
.begin ();
12371 action_it
!= stepping_actions
.end (); action_it
++)
12373 QUIT
; /* Allow user to bail out with ^C. */
12375 bool is_first
= action_it
== stepping_actions
.begin ();
12376 bool has_more
= action_it
!= stepping_actions
.end ();
12378 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12379 b
->number
, addrbuf
, /* address */
12380 is_first
? "S" : "",
12381 action_it
->c_str (),
12382 has_more
? "-" : "");
12384 remote_get_noisy_reply ();
12385 if (strcmp (rs
->buf
, "OK"))
12386 error (_("Error on target while setting tracepoints."));
12389 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12391 if (b
->location
!= NULL
)
12393 strcpy (buf
, "QTDPsrc:");
12394 encode_source_string (b
->number
, loc
->address
, "at",
12395 event_location_to_string (b
->location
.get ()),
12396 buf
+ strlen (buf
), 2048 - strlen (buf
));
12398 remote_get_noisy_reply ();
12399 if (strcmp (rs
->buf
, "OK"))
12400 warning (_("Target does not support source download."));
12402 if (b
->cond_string
)
12404 strcpy (buf
, "QTDPsrc:");
12405 encode_source_string (b
->number
, loc
->address
,
12406 "cond", b
->cond_string
, buf
+ strlen (buf
),
12407 2048 - strlen (buf
));
12409 remote_get_noisy_reply ();
12410 if (strcmp (rs
->buf
, "OK"))
12411 warning (_("Target does not support source download."));
12413 remote_download_command_source (b
->number
, loc
->address
,
12414 breakpoint_commands (b
));
12419 remote_can_download_tracepoint (struct target_ops
*self
)
12421 struct remote_state
*rs
= get_remote_state ();
12422 struct trace_status
*ts
;
12425 /* Don't try to install tracepoints until we've relocated our
12426 symbols, and fetched and merged the target's tracepoint list with
12428 if (rs
->starting_up
)
12431 ts
= current_trace_status ();
12432 status
= remote_get_trace_status (self
, ts
);
12434 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12437 /* If we are in a tracing experiment, but remote stub doesn't support
12438 installing tracepoint in trace, we have to return. */
12439 if (!remote_supports_install_in_trace ())
12447 remote_download_trace_state_variable (struct target_ops
*self
,
12448 const trace_state_variable
&tsv
)
12450 struct remote_state
*rs
= get_remote_state ();
12453 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12454 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
12456 p
= rs
->buf
+ strlen (rs
->buf
);
12457 if ((p
- rs
->buf
) + tsv
.name
.length () * 2 >= get_remote_packet_size ())
12458 error (_("Trace state variable name too long for tsv definition packet"));
12459 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
12462 remote_get_noisy_reply ();
12463 if (*rs
->buf
== '\0')
12464 error (_("Target does not support this command."));
12465 if (strcmp (rs
->buf
, "OK") != 0)
12466 error (_("Error on target while downloading trace state variable."));
12470 remote_enable_tracepoint (struct target_ops
*self
,
12471 struct bp_location
*location
)
12473 struct remote_state
*rs
= get_remote_state ();
12476 sprintf_vma (addr_buf
, location
->address
);
12477 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12478 location
->owner
->number
, addr_buf
);
12480 remote_get_noisy_reply ();
12481 if (*rs
->buf
== '\0')
12482 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12483 if (strcmp (rs
->buf
, "OK") != 0)
12484 error (_("Error on target while enabling tracepoint."));
12488 remote_disable_tracepoint (struct target_ops
*self
,
12489 struct bp_location
*location
)
12491 struct remote_state
*rs
= get_remote_state ();
12494 sprintf_vma (addr_buf
, location
->address
);
12495 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12496 location
->owner
->number
, addr_buf
);
12498 remote_get_noisy_reply ();
12499 if (*rs
->buf
== '\0')
12500 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12501 if (strcmp (rs
->buf
, "OK") != 0)
12502 error (_("Error on target while disabling tracepoint."));
12506 remote_trace_set_readonly_regions (struct target_ops
*self
)
12510 bfd_size_type size
;
12516 return; /* No information to give. */
12518 struct remote_state
*rs
= get_remote_state ();
12520 strcpy (rs
->buf
, "QTro");
12521 offset
= strlen (rs
->buf
);
12522 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12524 char tmp1
[40], tmp2
[40];
12527 if ((s
->flags
& SEC_LOAD
) == 0 ||
12528 /* (s->flags & SEC_CODE) == 0 || */
12529 (s
->flags
& SEC_READONLY
) == 0)
12533 vma
= bfd_get_section_vma (abfd
, s
);
12534 size
= bfd_get_section_size (s
);
12535 sprintf_vma (tmp1
, vma
);
12536 sprintf_vma (tmp2
, vma
+ size
);
12537 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12538 if (offset
+ sec_length
+ 1 > rs
->buf_size
)
12540 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12542 Too many sections for read-only sections definition packet."));
12545 xsnprintf (rs
->buf
+ offset
, rs
->buf_size
- offset
, ":%s,%s",
12547 offset
+= sec_length
;
12552 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12557 remote_trace_start (struct target_ops
*self
)
12559 struct remote_state
*rs
= get_remote_state ();
12561 putpkt ("QTStart");
12562 remote_get_noisy_reply ();
12563 if (*rs
->buf
== '\0')
12564 error (_("Target does not support this command."));
12565 if (strcmp (rs
->buf
, "OK") != 0)
12566 error (_("Bogus reply from target: %s"), rs
->buf
);
12570 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12572 /* Initialize it just to avoid a GCC false warning. */
12574 /* FIXME we need to get register block size some other way. */
12575 extern int trace_regblock_size
;
12576 enum packet_result result
;
12577 struct remote_state
*rs
= get_remote_state ();
12579 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12582 trace_regblock_size
12583 = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
12585 putpkt ("qTStatus");
12589 p
= remote_get_noisy_reply ();
12591 CATCH (ex
, RETURN_MASK_ERROR
)
12593 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12595 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12598 throw_exception (ex
);
12602 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12604 /* If the remote target doesn't do tracing, flag it. */
12605 if (result
== PACKET_UNKNOWN
)
12608 /* We're working with a live target. */
12609 ts
->filename
= NULL
;
12612 error (_("Bogus trace status reply from target: %s"), rs
->buf
);
12614 /* Function 'parse_trace_status' sets default value of each field of
12615 'ts' at first, so we don't have to do it here. */
12616 parse_trace_status (p
, ts
);
12618 return ts
->running
;
12622 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12623 struct uploaded_tp
*utp
)
12625 struct remote_state
*rs
= get_remote_state ();
12627 struct bp_location
*loc
;
12628 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12629 size_t size
= get_remote_packet_size ();
12634 tp
->traceframe_usage
= 0;
12635 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
12637 /* If the tracepoint was never downloaded, don't go asking for
12639 if (tp
->number_on_target
== 0)
12641 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12642 phex_nz (loc
->address
, 0));
12644 reply
= remote_get_noisy_reply ();
12645 if (reply
&& *reply
)
12648 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12654 utp
->hit_count
= 0;
12655 utp
->traceframe_usage
= 0;
12656 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12657 phex_nz (utp
->addr
, 0));
12659 reply
= remote_get_noisy_reply ();
12660 if (reply
&& *reply
)
12663 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12669 remote_trace_stop (struct target_ops
*self
)
12671 struct remote_state
*rs
= get_remote_state ();
12674 remote_get_noisy_reply ();
12675 if (*rs
->buf
== '\0')
12676 error (_("Target does not support this command."));
12677 if (strcmp (rs
->buf
, "OK") != 0)
12678 error (_("Bogus reply from target: %s"), rs
->buf
);
12682 remote_trace_find (struct target_ops
*self
,
12683 enum trace_find_type type
, int num
,
12684 CORE_ADDR addr1
, CORE_ADDR addr2
,
12687 struct remote_state
*rs
= get_remote_state ();
12688 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12690 int target_frameno
= -1, target_tracept
= -1;
12692 /* Lookups other than by absolute frame number depend on the current
12693 trace selected, so make sure it is correct on the remote end
12695 if (type
!= tfind_number
)
12696 set_remote_traceframe ();
12699 strcpy (p
, "QTFrame:");
12700 p
= strchr (p
, '\0');
12704 xsnprintf (p
, endbuf
- p
, "%x", num
);
12707 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12710 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12713 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12714 phex_nz (addr2
, 0));
12716 case tfind_outside
:
12717 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12718 phex_nz (addr2
, 0));
12721 error (_("Unknown trace find type %d"), type
);
12725 reply
= remote_get_noisy_reply ();
12726 if (*reply
== '\0')
12727 error (_("Target does not support this command."));
12729 while (reply
&& *reply
)
12734 target_frameno
= (int) strtol (p
, &reply
, 16);
12736 error (_("Unable to parse trace frame number"));
12737 /* Don't update our remote traceframe number cache on failure
12738 to select a remote traceframe. */
12739 if (target_frameno
== -1)
12744 target_tracept
= (int) strtol (p
, &reply
, 16);
12746 error (_("Unable to parse tracepoint number"));
12748 case 'O': /* "OK"? */
12749 if (reply
[1] == 'K' && reply
[2] == '\0')
12752 error (_("Bogus reply from target: %s"), reply
);
12755 error (_("Bogus reply from target: %s"), reply
);
12758 *tpp
= target_tracept
;
12760 rs
->remote_traceframe_number
= target_frameno
;
12761 return target_frameno
;
12765 remote_get_trace_state_variable_value (struct target_ops
*self
,
12766 int tsvnum
, LONGEST
*val
)
12768 struct remote_state
*rs
= get_remote_state ();
12772 set_remote_traceframe ();
12774 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12776 reply
= remote_get_noisy_reply ();
12777 if (reply
&& *reply
)
12781 unpack_varlen_hex (reply
+ 1, &uval
);
12782 *val
= (LONGEST
) uval
;
12790 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12792 struct remote_state
*rs
= get_remote_state ();
12796 strcpy (p
, "QTSave:");
12798 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12799 error (_("Remote file name too long for trace save packet"));
12800 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12803 reply
= remote_get_noisy_reply ();
12804 if (*reply
== '\0')
12805 error (_("Target does not support this command."));
12806 if (strcmp (reply
, "OK") != 0)
12807 error (_("Bogus reply from target: %s"), reply
);
12811 /* This is basically a memory transfer, but needs to be its own packet
12812 because we don't know how the target actually organizes its trace
12813 memory, plus we want to be able to ask for as much as possible, but
12814 not be unhappy if we don't get as much as we ask for. */
12817 remote_get_raw_trace_data (struct target_ops
*self
,
12818 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12820 struct remote_state
*rs
= get_remote_state ();
12826 strcpy (p
, "qTBuffer:");
12828 p
+= hexnumstr (p
, offset
);
12830 p
+= hexnumstr (p
, len
);
12834 reply
= remote_get_noisy_reply ();
12835 if (reply
&& *reply
)
12837 /* 'l' by itself means we're at the end of the buffer and
12838 there is nothing more to get. */
12842 /* Convert the reply into binary. Limit the number of bytes to
12843 convert according to our passed-in buffer size, rather than
12844 what was returned in the packet; if the target is
12845 unexpectedly generous and gives us a bigger reply than we
12846 asked for, we don't want to crash. */
12847 rslt
= hex2bin (reply
, buf
, len
);
12851 /* Something went wrong, flag as an error. */
12856 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12858 struct remote_state
*rs
= get_remote_state ();
12860 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12864 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12866 reply
= remote_get_noisy_reply ();
12867 if (*reply
== '\0')
12868 error (_("Target does not support this command."));
12869 if (strcmp (reply
, "OK") != 0)
12870 error (_("Bogus reply from target: %s"), reply
);
12873 warning (_("Target does not support disconnected tracing."));
12877 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12879 struct thread_info
*info
= find_thread_ptid (ptid
);
12881 if (info
!= NULL
&& info
->priv
!= NULL
)
12882 return get_remote_thread_info (info
)->core
;
12888 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12890 struct remote_state
*rs
= get_remote_state ();
12893 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12895 reply
= remote_get_noisy_reply ();
12896 if (*reply
== '\0')
12897 error (_("Target does not support this command."));
12898 if (strcmp (reply
, "OK") != 0)
12899 error (_("Bogus reply from target: %s"), reply
);
12902 static traceframe_info_up
12903 remote_traceframe_info (struct target_ops
*self
)
12905 gdb::optional
<gdb::char_vector
> text
12906 = target_read_stralloc (¤t_target
, TARGET_OBJECT_TRACEFRAME_INFO
,
12909 return parse_traceframe_info (text
->data ());
12914 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12915 instruction on which a fast tracepoint may be placed. Returns -1
12916 if the packet is not supported, and 0 if the minimum instruction
12917 length is unknown. */
12920 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
12922 struct remote_state
*rs
= get_remote_state ();
12925 /* If we're not debugging a process yet, the IPA can't be
12927 if (!target_has_execution
)
12930 /* Make sure the remote is pointing at the right process. */
12931 set_general_process ();
12933 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
12935 reply
= remote_get_noisy_reply ();
12936 if (*reply
== '\0')
12940 ULONGEST min_insn_len
;
12942 unpack_varlen_hex (reply
, &min_insn_len
);
12944 return (int) min_insn_len
;
12949 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
12951 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
12953 struct remote_state
*rs
= get_remote_state ();
12954 char *buf
= rs
->buf
;
12955 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12956 enum packet_result result
;
12958 gdb_assert (val
>= 0 || val
== -1);
12959 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
12960 /* Send -1 as literal "-1" to avoid host size dependency. */
12964 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
12967 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
12970 remote_get_noisy_reply ();
12971 result
= packet_ok (rs
->buf
,
12972 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
12974 if (result
!= PACKET_OK
)
12975 warning (_("Bogus reply from target: %s"), rs
->buf
);
12980 remote_set_trace_notes (struct target_ops
*self
,
12981 const char *user
, const char *notes
,
12982 const char *stop_notes
)
12984 struct remote_state
*rs
= get_remote_state ();
12986 char *buf
= rs
->buf
;
12987 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12990 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
12993 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
12994 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13000 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13001 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13007 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13008 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13012 /* Ensure the buffer is terminated. */
13016 reply
= remote_get_noisy_reply ();
13017 if (*reply
== '\0')
13020 if (strcmp (reply
, "OK") != 0)
13021 error (_("Bogus reply from target: %s"), reply
);
13027 remote_use_agent (struct target_ops
*self
, int use
)
13029 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13031 struct remote_state
*rs
= get_remote_state ();
13033 /* If the stub supports QAgent. */
13034 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13036 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13038 if (strcmp (rs
->buf
, "OK") == 0)
13049 remote_can_use_agent (struct target_ops
*self
)
13051 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13054 struct btrace_target_info
13056 /* The ptid of the traced thread. */
13059 /* The obtained branch trace configuration. */
13060 struct btrace_config conf
;
13063 /* Reset our idea of our target's btrace configuration. */
13066 remote_btrace_reset (void)
13068 struct remote_state
*rs
= get_remote_state ();
13070 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13073 /* Synchronize the configuration with the target. */
13076 btrace_sync_conf (const struct btrace_config
*conf
)
13078 struct packet_config
*packet
;
13079 struct remote_state
*rs
;
13080 char *buf
, *pos
, *endbuf
;
13082 rs
= get_remote_state ();
13084 endbuf
= buf
+ get_remote_packet_size ();
13086 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13087 if (packet_config_support (packet
) == PACKET_ENABLE
13088 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13091 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13095 getpkt (&buf
, &rs
->buf_size
, 0);
13097 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13099 if (buf
[0] == 'E' && buf
[1] == '.')
13100 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13102 error (_("Failed to configure the BTS buffer size."));
13105 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13108 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13109 if (packet_config_support (packet
) == PACKET_ENABLE
13110 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13113 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13117 getpkt (&buf
, &rs
->buf_size
, 0);
13119 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13121 if (buf
[0] == 'E' && buf
[1] == '.')
13122 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13124 error (_("Failed to configure the trace buffer size."));
13127 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13131 /* Read the current thread's btrace configuration from the target and
13132 store it into CONF. */
13135 btrace_read_config (struct btrace_config
*conf
)
13137 gdb::optional
<gdb::char_vector
> xml
13138 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE_CONF
, "");
13140 parse_xml_btrace_conf (conf
, xml
->data ());
13143 /* Maybe reopen target btrace. */
13146 remote_btrace_maybe_reopen (void)
13148 struct remote_state
*rs
= get_remote_state ();
13149 struct thread_info
*tp
;
13150 int btrace_target_pushed
= 0;
13153 scoped_restore_current_thread restore_thread
;
13155 ALL_NON_EXITED_THREADS (tp
)
13157 set_general_thread (tp
->ptid
);
13159 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13160 btrace_read_config (&rs
->btrace_config
);
13162 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13165 #if !defined (HAVE_LIBIPT)
13166 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13171 warning (_("Target is recording using Intel Processor Trace "
13172 "but support was disabled at compile time."));
13177 #endif /* !defined (HAVE_LIBIPT) */
13179 /* Push target, once, but before anything else happens. This way our
13180 changes to the threads will be cleaned up by unpushing the target
13181 in case btrace_read_config () throws. */
13182 if (!btrace_target_pushed
)
13184 btrace_target_pushed
= 1;
13185 record_btrace_push_target ();
13186 printf_filtered (_("Target is recording using %s.\n"),
13187 btrace_format_string (rs
->btrace_config
.format
));
13190 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13191 tp
->btrace
.target
->ptid
= tp
->ptid
;
13192 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13196 /* Enable branch tracing. */
13198 static struct btrace_target_info
*
13199 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
13200 const struct btrace_config
*conf
)
13202 struct btrace_target_info
*tinfo
= NULL
;
13203 struct packet_config
*packet
= NULL
;
13204 struct remote_state
*rs
= get_remote_state ();
13205 char *buf
= rs
->buf
;
13206 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13208 switch (conf
->format
)
13210 case BTRACE_FORMAT_BTS
:
13211 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13214 case BTRACE_FORMAT_PT
:
13215 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13219 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13220 error (_("Target does not support branch tracing."));
13222 btrace_sync_conf (conf
);
13224 set_general_thread (ptid
);
13226 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13228 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13230 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13232 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13233 error (_("Could not enable branch tracing for %s: %s"),
13234 target_pid_to_str (ptid
), rs
->buf
+ 2);
13236 error (_("Could not enable branch tracing for %s."),
13237 target_pid_to_str (ptid
));
13240 tinfo
= XCNEW (struct btrace_target_info
);
13241 tinfo
->ptid
= ptid
;
13243 /* If we fail to read the configuration, we lose some information, but the
13244 tracing itself is not impacted. */
13247 btrace_read_config (&tinfo
->conf
);
13249 CATCH (err
, RETURN_MASK_ERROR
)
13251 if (err
.message
!= NULL
)
13252 warning ("%s", err
.message
);
13259 /* Disable branch tracing. */
13262 remote_disable_btrace (struct target_ops
*self
,
13263 struct btrace_target_info
*tinfo
)
13265 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13266 struct remote_state
*rs
= get_remote_state ();
13267 char *buf
= rs
->buf
;
13268 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13270 if (packet_config_support (packet
) != PACKET_ENABLE
)
13271 error (_("Target does not support branch tracing."));
13273 set_general_thread (tinfo
->ptid
);
13275 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13277 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13279 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13281 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13282 error (_("Could not disable branch tracing for %s: %s"),
13283 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13285 error (_("Could not disable branch tracing for %s."),
13286 target_pid_to_str (tinfo
->ptid
));
13292 /* Teardown branch tracing. */
13295 remote_teardown_btrace (struct target_ops
*self
,
13296 struct btrace_target_info
*tinfo
)
13298 /* We must not talk to the target during teardown. */
13302 /* Read the branch trace. */
13304 static enum btrace_error
13305 remote_read_btrace (struct target_ops
*self
,
13306 struct btrace_data
*btrace
,
13307 struct btrace_target_info
*tinfo
,
13308 enum btrace_read_type type
)
13310 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13313 if (packet_config_support (packet
) != PACKET_ENABLE
)
13314 error (_("Target does not support branch tracing."));
13316 #if !defined(HAVE_LIBEXPAT)
13317 error (_("Cannot process branch tracing result. XML parsing not supported."));
13322 case BTRACE_READ_ALL
:
13325 case BTRACE_READ_NEW
:
13328 case BTRACE_READ_DELTA
:
13332 internal_error (__FILE__
, __LINE__
,
13333 _("Bad branch tracing read type: %u."),
13334 (unsigned int) type
);
13337 gdb::optional
<gdb::char_vector
> xml
13338 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE
, annex
);
13340 return BTRACE_ERR_UNKNOWN
;
13342 parse_xml_btrace (btrace
, xml
->data ());
13344 return BTRACE_ERR_NONE
;
13347 static const struct btrace_config
*
13348 remote_btrace_conf (struct target_ops
*self
,
13349 const struct btrace_target_info
*tinfo
)
13351 return &tinfo
->conf
;
13355 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
13357 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13361 /* Implementation of to_load. */
13364 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
13366 generic_load (name
, from_tty
);
13369 /* Accepts an integer PID; returns a string representing a file that
13370 can be opened on the remote side to get the symbols for the child
13371 process. Returns NULL if the operation is not supported. */
13374 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13376 static gdb::optional
<gdb::char_vector
> filename
;
13377 struct inferior
*inf
;
13378 char *annex
= NULL
;
13380 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13383 inf
= find_inferior_pid (pid
);
13385 internal_error (__FILE__
, __LINE__
,
13386 _("not currently attached to process %d"), pid
);
13388 if (!inf
->fake_pid_p
)
13390 const int annex_size
= 9;
13392 annex
= (char *) alloca (annex_size
);
13393 xsnprintf (annex
, annex_size
, "%x", pid
);
13396 filename
= target_read_stralloc (¤t_target
,
13397 TARGET_OBJECT_EXEC_FILE
, annex
);
13399 return filename
? filename
->data () : nullptr;
13402 /* Implement the to_can_do_single_step target_ops method. */
13405 remote_can_do_single_step (struct target_ops
*ops
)
13407 /* We can only tell whether target supports single step or not by
13408 supported s and S vCont actions if the stub supports vContSupported
13409 feature. If the stub doesn't support vContSupported feature,
13410 we have conservatively to think target doesn't supports single
13412 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13414 struct remote_state
*rs
= get_remote_state ();
13416 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13417 remote_vcont_probe (rs
);
13419 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13425 /* Implementation of the to_execution_direction method for the remote
13428 static enum exec_direction_kind
13429 remote_execution_direction (struct target_ops
*self
)
13431 struct remote_state
*rs
= get_remote_state ();
13433 return rs
->last_resume_exec_dir
;
13436 /* Return pointer to the thread_info struct which corresponds to
13437 THREAD_HANDLE (having length HANDLE_LEN). */
13439 static struct thread_info
*
13440 remote_thread_handle_to_thread_info (struct target_ops
*ops
,
13441 const gdb_byte
*thread_handle
,
13443 struct inferior
*inf
)
13445 struct thread_info
*tp
;
13447 ALL_NON_EXITED_THREADS (tp
)
13449 remote_thread_info
*priv
= get_remote_thread_info (tp
);
13451 if (tp
->inf
== inf
&& priv
!= NULL
)
13453 if (handle_len
!= priv
->thread_handle
.size ())
13454 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13455 handle_len
, priv
->thread_handle
.size ());
13456 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
13466 init_remote_ops (void)
13468 remote_ops
.to_shortname
= "remote";
13469 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13470 remote_ops
.to_doc
=
13471 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13472 Specify the serial device it is connected to\n\
13473 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13474 remote_ops
.to_open
= remote_open
;
13475 remote_ops
.to_close
= remote_close
;
13476 remote_ops
.to_detach
= remote_detach
;
13477 remote_ops
.to_disconnect
= remote_disconnect
;
13478 remote_ops
.to_resume
= remote_resume
;
13479 remote_ops
.to_commit_resume
= remote_commit_resume
;
13480 remote_ops
.to_wait
= remote_wait
;
13481 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13482 remote_ops
.to_store_registers
= remote_store_registers
;
13483 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13484 remote_ops
.to_files_info
= remote_files_info
;
13485 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13486 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13487 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13488 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13489 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13490 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13491 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13492 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13493 remote_ops
.to_watchpoint_addr_within_range
=
13494 remote_watchpoint_addr_within_range
;
13495 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13496 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13497 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13498 remote_ops
.to_region_ok_for_hw_watchpoint
13499 = remote_region_ok_for_hw_watchpoint
;
13500 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13501 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13502 remote_ops
.to_kill
= remote_kill
;
13503 remote_ops
.to_load
= remote_load
;
13504 remote_ops
.to_mourn_inferior
= remote_mourn
;
13505 remote_ops
.to_pass_signals
= remote_pass_signals
;
13506 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13507 remote_ops
.to_program_signals
= remote_program_signals
;
13508 remote_ops
.to_thread_alive
= remote_thread_alive
;
13509 remote_ops
.to_thread_name
= remote_thread_name
;
13510 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13511 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13512 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13513 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13514 remote_ops
.to_stop
= remote_stop
;
13515 remote_ops
.to_interrupt
= remote_interrupt
;
13516 remote_ops
.to_pass_ctrlc
= remote_pass_ctrlc
;
13517 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13518 remote_ops
.to_get_memory_xfer_limit
= remote_get_memory_xfer_limit
;
13519 remote_ops
.to_rcmd
= remote_rcmd
;
13520 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13521 remote_ops
.to_log_command
= serial_log_command
;
13522 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13523 remote_ops
.to_stratum
= process_stratum
;
13524 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13525 remote_ops
.to_has_memory
= default_child_has_memory
;
13526 remote_ops
.to_has_stack
= default_child_has_stack
;
13527 remote_ops
.to_has_registers
= default_child_has_registers
;
13528 remote_ops
.to_has_execution
= default_child_has_execution
;
13529 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13530 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13531 remote_ops
.to_magic
= OPS_MAGIC
;
13532 remote_ops
.to_memory_map
= remote_memory_map
;
13533 remote_ops
.to_flash_erase
= remote_flash_erase
;
13534 remote_ops
.to_flash_done
= remote_flash_done
;
13535 remote_ops
.to_read_description
= remote_read_description
;
13536 remote_ops
.to_search_memory
= remote_search_memory
;
13537 remote_ops
.to_can_async_p
= remote_can_async_p
;
13538 remote_ops
.to_is_async_p
= remote_is_async_p
;
13539 remote_ops
.to_async
= remote_async
;
13540 remote_ops
.to_thread_events
= remote_thread_events
;
13541 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13542 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13543 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13544 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13545 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13546 remote_ops
.to_supports_disable_randomization
13547 = remote_supports_disable_randomization
;
13548 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13549 remote_ops
.to_fileio_open
= remote_hostio_open
;
13550 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13551 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13552 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13553 remote_ops
.to_fileio_close
= remote_hostio_close
;
13554 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13555 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13556 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13557 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13558 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13559 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13560 remote_ops
.to_trace_init
= remote_trace_init
;
13561 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13562 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13563 remote_ops
.to_download_trace_state_variable
13564 = remote_download_trace_state_variable
;
13565 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13566 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13567 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13568 remote_ops
.to_trace_start
= remote_trace_start
;
13569 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13570 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13571 remote_ops
.to_trace_stop
= remote_trace_stop
;
13572 remote_ops
.to_trace_find
= remote_trace_find
;
13573 remote_ops
.to_get_trace_state_variable_value
13574 = remote_get_trace_state_variable_value
;
13575 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13576 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13577 remote_ops
.to_upload_trace_state_variables
13578 = remote_upload_trace_state_variables
;
13579 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13580 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13581 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13582 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13583 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13584 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13585 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13586 remote_ops
.to_verify_memory
= remote_verify_memory
;
13587 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13588 remote_ops
.to_set_permissions
= remote_set_permissions
;
13589 remote_ops
.to_static_tracepoint_marker_at
13590 = remote_static_tracepoint_marker_at
;
13591 remote_ops
.to_static_tracepoint_markers_by_strid
13592 = remote_static_tracepoint_markers_by_strid
;
13593 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13594 remote_ops
.to_use_agent
= remote_use_agent
;
13595 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13596 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13597 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13598 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13599 remote_ops
.to_read_btrace
= remote_read_btrace
;
13600 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13601 remote_ops
.to_augmented_libraries_svr4_read
=
13602 remote_augmented_libraries_svr4_read
;
13603 remote_ops
.to_follow_fork
= remote_follow_fork
;
13604 remote_ops
.to_follow_exec
= remote_follow_exec
;
13605 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13606 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13607 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13608 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13609 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13610 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13611 remote_ops
.to_execution_direction
= remote_execution_direction
;
13612 remote_ops
.to_thread_handle_to_thread_info
=
13613 remote_thread_handle_to_thread_info
;
13616 /* Set up the extended remote vector by making a copy of the standard
13617 remote vector and adding to it. */
13620 init_extended_remote_ops (void)
13622 extended_remote_ops
= remote_ops
;
13624 extended_remote_ops
.to_shortname
= "extended-remote";
13625 extended_remote_ops
.to_longname
=
13626 "Extended remote serial target in gdb-specific protocol";
13627 extended_remote_ops
.to_doc
=
13628 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13629 Specify the serial device it is connected to (e.g. /dev/ttya).";
13630 extended_remote_ops
.to_open
= extended_remote_open
;
13631 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13632 extended_remote_ops
.to_detach
= extended_remote_detach
;
13633 extended_remote_ops
.to_attach
= extended_remote_attach
;
13634 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13635 extended_remote_ops
.to_supports_disable_randomization
13636 = extended_remote_supports_disable_randomization
;
13640 remote_can_async_p (struct target_ops
*ops
)
13642 struct remote_state
*rs
= get_remote_state ();
13644 /* We don't go async if the user has explicitly prevented it with the
13645 "maint set target-async" command. */
13646 if (!target_async_permitted
)
13649 /* We're async whenever the serial device is. */
13650 return serial_can_async_p (rs
->remote_desc
);
13654 remote_is_async_p (struct target_ops
*ops
)
13656 struct remote_state
*rs
= get_remote_state ();
13658 if (!target_async_permitted
)
13659 /* We only enable async when the user specifically asks for it. */
13662 /* We're async whenever the serial device is. */
13663 return serial_is_async_p (rs
->remote_desc
);
13666 /* Pass the SERIAL event on and up to the client. One day this code
13667 will be able to delay notifying the client of an event until the
13668 point where an entire packet has been received. */
13670 static serial_event_ftype remote_async_serial_handler
;
13673 remote_async_serial_handler (struct serial
*scb
, void *context
)
13675 /* Don't propogate error information up to the client. Instead let
13676 the client find out about the error by querying the target. */
13677 inferior_event_handler (INF_REG_EVENT
, NULL
);
13681 remote_async_inferior_event_handler (gdb_client_data data
)
13683 inferior_event_handler (INF_REG_EVENT
, NULL
);
13687 remote_async (struct target_ops
*ops
, int enable
)
13689 struct remote_state
*rs
= get_remote_state ();
13693 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13695 /* If there are pending events in the stop reply queue tell the
13696 event loop to process them. */
13697 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13698 mark_async_event_handler (remote_async_inferior_event_token
);
13699 /* For simplicity, below we clear the pending events token
13700 without remembering whether it is marked, so here we always
13701 mark it. If there's actually no pending notification to
13702 process, this ends up being a no-op (other than a spurious
13703 event-loop wakeup). */
13704 if (target_is_non_stop_p ())
13705 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13709 serial_async (rs
->remote_desc
, NULL
, NULL
);
13710 /* If the core is disabling async, it doesn't want to be
13711 disturbed with target events. Clear all async event sources
13713 clear_async_event_handler (remote_async_inferior_event_token
);
13714 if (target_is_non_stop_p ())
13715 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13719 /* Implementation of the to_thread_events method. */
13722 remote_thread_events (struct target_ops
*ops
, int enable
)
13724 struct remote_state
*rs
= get_remote_state ();
13725 size_t size
= get_remote_packet_size ();
13727 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13730 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13732 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13734 switch (packet_ok (rs
->buf
,
13735 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13738 if (strcmp (rs
->buf
, "OK") != 0)
13739 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13742 warning (_("Remote failure reply: %s"), rs
->buf
);
13744 case PACKET_UNKNOWN
:
13750 set_remote_cmd (const char *args
, int from_tty
)
13752 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13756 show_remote_cmd (const char *args
, int from_tty
)
13758 /* We can't just use cmd_show_list here, because we want to skip
13759 the redundant "show remote Z-packet" and the legacy aliases. */
13760 struct cmd_list_element
*list
= remote_show_cmdlist
;
13761 struct ui_out
*uiout
= current_uiout
;
13763 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
13764 for (; list
!= NULL
; list
= list
->next
)
13765 if (strcmp (list
->name
, "Z-packet") == 0)
13767 else if (list
->type
== not_set_cmd
)
13768 /* Alias commands are exactly like the original, except they
13769 don't have the normal type. */
13773 ui_out_emit_tuple
option_emitter (uiout
, "option");
13775 uiout
->field_string ("name", list
->name
);
13776 uiout
->text (": ");
13777 if (list
->type
== show_cmd
)
13778 do_show_command (NULL
, from_tty
, list
);
13780 cmd_func (list
, NULL
, from_tty
);
13785 /* Function to be called whenever a new objfile (shlib) is detected. */
13787 remote_new_objfile (struct objfile
*objfile
)
13789 struct remote_state
*rs
= get_remote_state ();
13791 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13792 remote_check_symbols ();
13795 /* Pull all the tracepoints defined on the target and create local
13796 data structures representing them. We don't want to create real
13797 tracepoints yet, we don't want to mess up the user's existing
13801 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13803 struct remote_state
*rs
= get_remote_state ();
13806 /* Ask for a first packet of tracepoint definition. */
13808 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13810 while (*p
&& *p
!= 'l')
13812 parse_tracepoint_definition (p
, utpp
);
13813 /* Ask for another packet of tracepoint definition. */
13815 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13822 remote_upload_trace_state_variables (struct target_ops
*self
,
13823 struct uploaded_tsv
**utsvp
)
13825 struct remote_state
*rs
= get_remote_state ();
13828 /* Ask for a first packet of variable definition. */
13830 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13832 while (*p
&& *p
!= 'l')
13834 parse_tsv_definition (p
, utsvp
);
13835 /* Ask for another packet of variable definition. */
13837 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13843 /* The "set/show range-stepping" show hook. */
13846 show_range_stepping (struct ui_file
*file
, int from_tty
,
13847 struct cmd_list_element
*c
,
13850 fprintf_filtered (file
,
13851 _("Debugger's willingness to use range stepping "
13852 "is %s.\n"), value
);
13855 /* The "set/show range-stepping" set hook. */
13858 set_range_stepping (const char *ignore_args
, int from_tty
,
13859 struct cmd_list_element
*c
)
13861 struct remote_state
*rs
= get_remote_state ();
13863 /* Whene enabling, check whether range stepping is actually
13864 supported by the target, and warn if not. */
13865 if (use_range_stepping
)
13867 if (rs
->remote_desc
!= NULL
)
13869 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13870 remote_vcont_probe (rs
);
13872 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13873 && rs
->supports_vCont
.r
)
13877 warning (_("Range stepping is not supported by the current target"));
13882 _initialize_remote (void)
13884 struct cmd_list_element
*cmd
;
13885 const char *cmd_name
;
13887 /* architecture specific data */
13888 remote_gdbarch_data_handle
=
13889 gdbarch_data_register_post_init (init_remote_state
);
13890 remote_g_packet_data_handle
=
13891 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
13894 = register_program_space_data_with_cleanup (NULL
,
13895 remote_pspace_data_cleanup
);
13897 /* Initialize the per-target state. At the moment there is only one
13898 of these, not one per target. Only one target is active at a
13900 remote_state
= new_remote_state ();
13902 init_remote_ops ();
13903 add_target (&remote_ops
);
13905 init_extended_remote_ops ();
13906 add_target (&extended_remote_ops
);
13908 /* Hook into new objfile notification. */
13909 gdb::observers::new_objfile
.attach (remote_new_objfile
);
13910 /* We're no longer interested in notification events of an inferior
13912 gdb::observers::inferior_exit
.attach (discard_pending_stop_replies
);
13915 init_remote_threadtests ();
13918 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
13919 /* set/show remote ... */
13921 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
13922 Remote protocol specific variables\n\
13923 Configure various remote-protocol specific variables such as\n\
13924 the packets being used"),
13925 &remote_set_cmdlist
, "set remote ",
13926 0 /* allow-unknown */, &setlist
);
13927 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
13928 Remote protocol specific variables\n\
13929 Configure various remote-protocol specific variables such as\n\
13930 the packets being used"),
13931 &remote_show_cmdlist
, "show remote ",
13932 0 /* allow-unknown */, &showlist
);
13934 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
13935 Compare section data on target to the exec file.\n\
13936 Argument is a single section name (default: all loaded sections).\n\
13937 To compare only read-only loaded sections, specify the -r option."),
13940 add_cmd ("packet", class_maintenance
, packet_command
, _("\
13941 Send an arbitrary packet to a remote target.\n\
13942 maintenance packet TEXT\n\
13943 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13944 this command sends the string TEXT to the inferior, and displays the\n\
13945 response packet. GDB supplies the initial `$' character, and the\n\
13946 terminating `#' character and checksum."),
13949 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
13950 Set whether to send break if interrupted."), _("\
13951 Show whether to send break if interrupted."), _("\
13952 If set, a break, instead of a cntrl-c, is sent to the remote target."),
13953 set_remotebreak
, show_remotebreak
,
13954 &setlist
, &showlist
);
13955 cmd_name
= "remotebreak";
13956 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
13957 deprecate_cmd (cmd
, "set remote interrupt-sequence");
13958 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
13959 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
13960 deprecate_cmd (cmd
, "show remote interrupt-sequence");
13962 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
13963 interrupt_sequence_modes
, &interrupt_sequence_mode
,
13965 Set interrupt sequence to remote target."), _("\
13966 Show interrupt sequence to remote target."), _("\
13967 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
13968 NULL
, show_interrupt_sequence
,
13969 &remote_set_cmdlist
,
13970 &remote_show_cmdlist
);
13972 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
13973 &interrupt_on_connect
, _("\
13974 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13975 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13976 If set, interrupt sequence is sent to remote target."),
13978 &remote_set_cmdlist
, &remote_show_cmdlist
);
13980 /* Install commands for configuring memory read/write packets. */
13982 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
13983 Set the maximum number of bytes per memory write packet (deprecated)."),
13985 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
13986 Show the maximum number of bytes per memory write packet (deprecated)."),
13988 add_cmd ("memory-write-packet-size", no_class
,
13989 set_memory_write_packet_size
, _("\
13990 Set the maximum number of bytes per memory-write packet.\n\
13991 Specify the number of bytes in a packet or 0 (zero) for the\n\
13992 default packet size. The actual limit is further reduced\n\
13993 dependent on the target. Specify ``fixed'' to disable the\n\
13994 further restriction and ``limit'' to enable that restriction."),
13995 &remote_set_cmdlist
);
13996 add_cmd ("memory-read-packet-size", no_class
,
13997 set_memory_read_packet_size
, _("\
13998 Set the maximum number of bytes per memory-read packet.\n\
13999 Specify the number of bytes in a packet or 0 (zero) for the\n\
14000 default packet size. The actual limit is further reduced\n\
14001 dependent on the target. Specify ``fixed'' to disable the\n\
14002 further restriction and ``limit'' to enable that restriction."),
14003 &remote_set_cmdlist
);
14004 add_cmd ("memory-write-packet-size", no_class
,
14005 show_memory_write_packet_size
,
14006 _("Show the maximum number of bytes per memory-write packet."),
14007 &remote_show_cmdlist
);
14008 add_cmd ("memory-read-packet-size", no_class
,
14009 show_memory_read_packet_size
,
14010 _("Show the maximum number of bytes per memory-read packet."),
14011 &remote_show_cmdlist
);
14013 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
14014 &remote_hw_watchpoint_limit
, _("\
14015 Set the maximum number of target hardware watchpoints."), _("\
14016 Show the maximum number of target hardware watchpoints."), _("\
14017 Specify a negative limit for unlimited."),
14018 NULL
, NULL
, /* FIXME: i18n: The maximum
14019 number of target hardware
14020 watchpoints is %s. */
14021 &remote_set_cmdlist
, &remote_show_cmdlist
);
14022 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
14023 &remote_hw_watchpoint_length_limit
, _("\
14024 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14025 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14026 Specify a negative limit for unlimited."),
14027 NULL
, NULL
, /* FIXME: i18n: The maximum
14028 length (in bytes) of a target
14029 hardware watchpoint is %s. */
14030 &remote_set_cmdlist
, &remote_show_cmdlist
);
14031 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
14032 &remote_hw_breakpoint_limit
, _("\
14033 Set the maximum number of target hardware breakpoints."), _("\
14034 Show the maximum number of target hardware breakpoints."), _("\
14035 Specify a negative limit for unlimited."),
14036 NULL
, NULL
, /* FIXME: i18n: The maximum
14037 number of target hardware
14038 breakpoints is %s. */
14039 &remote_set_cmdlist
, &remote_show_cmdlist
);
14041 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14042 &remote_address_size
, _("\
14043 Set the maximum size of the address (in bits) in a memory packet."), _("\
14044 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14046 NULL
, /* FIXME: i18n: */
14047 &setlist
, &showlist
);
14049 init_all_packet_configs ();
14051 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14052 "X", "binary-download", 1);
14054 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14055 "vCont", "verbose-resume", 0);
14057 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14058 "QPassSignals", "pass-signals", 0);
14060 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14061 "QCatchSyscalls", "catch-syscalls", 0);
14063 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14064 "QProgramSignals", "program-signals", 0);
14066 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14067 "QSetWorkingDir", "set-working-dir", 0);
14069 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14070 "QStartupWithShell", "startup-with-shell", 0);
14072 add_packet_config_cmd (&remote_protocol_packets
14073 [PACKET_QEnvironmentHexEncoded
],
14074 "QEnvironmentHexEncoded", "environment-hex-encoded",
14077 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14078 "QEnvironmentReset", "environment-reset",
14081 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14082 "QEnvironmentUnset", "environment-unset",
14085 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14086 "qSymbol", "symbol-lookup", 0);
14088 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14089 "P", "set-register", 1);
14091 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14092 "p", "fetch-register", 1);
14094 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14095 "Z0", "software-breakpoint", 0);
14097 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14098 "Z1", "hardware-breakpoint", 0);
14100 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14101 "Z2", "write-watchpoint", 0);
14103 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14104 "Z3", "read-watchpoint", 0);
14106 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14107 "Z4", "access-watchpoint", 0);
14109 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14110 "qXfer:auxv:read", "read-aux-vector", 0);
14112 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14113 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14115 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14116 "qXfer:features:read", "target-features", 0);
14118 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14119 "qXfer:libraries:read", "library-info", 0);
14121 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14122 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14124 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14125 "qXfer:memory-map:read", "memory-map", 0);
14127 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14128 "qXfer:spu:read", "read-spu-object", 0);
14130 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14131 "qXfer:spu:write", "write-spu-object", 0);
14133 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14134 "qXfer:osdata:read", "osdata", 0);
14136 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14137 "qXfer:threads:read", "threads", 0);
14139 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14140 "qXfer:siginfo:read", "read-siginfo-object", 0);
14142 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14143 "qXfer:siginfo:write", "write-siginfo-object", 0);
14145 add_packet_config_cmd
14146 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14147 "qXfer:traceframe-info:read", "traceframe-info", 0);
14149 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14150 "qXfer:uib:read", "unwind-info-block", 0);
14152 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14153 "qGetTLSAddr", "get-thread-local-storage-address",
14156 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14157 "qGetTIBAddr", "get-thread-information-block-address",
14160 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14161 "bc", "reverse-continue", 0);
14163 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14164 "bs", "reverse-step", 0);
14166 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14167 "qSupported", "supported-packets", 0);
14169 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14170 "qSearch:memory", "search-memory", 0);
14172 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14173 "qTStatus", "trace-status", 0);
14175 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14176 "vFile:setfs", "hostio-setfs", 0);
14178 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14179 "vFile:open", "hostio-open", 0);
14181 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14182 "vFile:pread", "hostio-pread", 0);
14184 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14185 "vFile:pwrite", "hostio-pwrite", 0);
14187 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14188 "vFile:close", "hostio-close", 0);
14190 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14191 "vFile:unlink", "hostio-unlink", 0);
14193 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14194 "vFile:readlink", "hostio-readlink", 0);
14196 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14197 "vFile:fstat", "hostio-fstat", 0);
14199 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14200 "vAttach", "attach", 0);
14202 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14205 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14206 "QStartNoAckMode", "noack", 0);
14208 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14209 "vKill", "kill", 0);
14211 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14212 "qAttached", "query-attached", 0);
14214 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14215 "ConditionalTracepoints",
14216 "conditional-tracepoints", 0);
14218 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14219 "ConditionalBreakpoints",
14220 "conditional-breakpoints", 0);
14222 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14223 "BreakpointCommands",
14224 "breakpoint-commands", 0);
14226 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14227 "FastTracepoints", "fast-tracepoints", 0);
14229 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14230 "TracepointSource", "TracepointSource", 0);
14232 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14233 "QAllow", "allow", 0);
14235 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14236 "StaticTracepoints", "static-tracepoints", 0);
14238 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14239 "InstallInTrace", "install-in-trace", 0);
14241 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14242 "qXfer:statictrace:read", "read-sdata-object", 0);
14244 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14245 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14247 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14248 "QDisableRandomization", "disable-randomization", 0);
14250 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14251 "QAgent", "agent", 0);
14253 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14254 "QTBuffer:size", "trace-buffer-size", 0);
14256 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14257 "Qbtrace:off", "disable-btrace", 0);
14259 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14260 "Qbtrace:bts", "enable-btrace-bts", 0);
14262 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14263 "Qbtrace:pt", "enable-btrace-pt", 0);
14265 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14266 "qXfer:btrace", "read-btrace", 0);
14268 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14269 "qXfer:btrace-conf", "read-btrace-conf", 0);
14271 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14272 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14274 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14275 "multiprocess-feature", "multiprocess-feature", 0);
14277 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14278 "swbreak-feature", "swbreak-feature", 0);
14280 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14281 "hwbreak-feature", "hwbreak-feature", 0);
14283 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14284 "fork-event-feature", "fork-event-feature", 0);
14286 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14287 "vfork-event-feature", "vfork-event-feature", 0);
14289 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14290 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14292 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14293 "vContSupported", "verbose-resume-supported", 0);
14295 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14296 "exec-event-feature", "exec-event-feature", 0);
14298 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14299 "vCtrlC", "ctrl-c", 0);
14301 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14302 "QThreadEvents", "thread-events", 0);
14304 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14305 "N stop reply", "no-resumed-stop-reply", 0);
14307 /* Assert that we've registered "set remote foo-packet" commands
14308 for all packet configs. */
14312 for (i
= 0; i
< PACKET_MAX
; i
++)
14314 /* Ideally all configs would have a command associated. Some
14315 still don't though. */
14320 case PACKET_QNonStop
:
14321 case PACKET_EnableDisableTracepoints_feature
:
14322 case PACKET_tracenz_feature
:
14323 case PACKET_DisconnectedTracing_feature
:
14324 case PACKET_augmented_libraries_svr4_read_feature
:
14326 /* Additions to this list need to be well justified:
14327 pre-existing packets are OK; new packets are not. */
14335 /* This catches both forgetting to add a config command, and
14336 forgetting to remove a packet from the exception list. */
14337 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14341 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14342 Z sub-packet has its own set and show commands, but users may
14343 have sets to this variable in their .gdbinit files (or in their
14345 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14346 &remote_Z_packet_detect
, _("\
14347 Set use of remote protocol `Z' packets"), _("\
14348 Show use of remote protocol `Z' packets "), _("\
14349 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14351 set_remote_protocol_Z_packet_cmd
,
14352 show_remote_protocol_Z_packet_cmd
,
14353 /* FIXME: i18n: Use of remote protocol
14354 `Z' packets is %s. */
14355 &remote_set_cmdlist
, &remote_show_cmdlist
);
14357 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14358 Manipulate files on the remote system\n\
14359 Transfer files to and from the remote target system."),
14360 &remote_cmdlist
, "remote ",
14361 0 /* allow-unknown */, &cmdlist
);
14363 add_cmd ("put", class_files
, remote_put_command
,
14364 _("Copy a local file to the remote system."),
14367 add_cmd ("get", class_files
, remote_get_command
,
14368 _("Copy a remote file to the local system."),
14371 add_cmd ("delete", class_files
, remote_delete_command
,
14372 _("Delete a remote file."),
14375 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14376 &remote_exec_file_var
, _("\
14377 Set the remote pathname for \"run\""), _("\
14378 Show the remote pathname for \"run\""), NULL
,
14379 set_remote_exec_file
,
14380 show_remote_exec_file
,
14381 &remote_set_cmdlist
,
14382 &remote_show_cmdlist
);
14384 add_setshow_boolean_cmd ("range-stepping", class_run
,
14385 &use_range_stepping
, _("\
14386 Enable or disable range stepping."), _("\
14387 Show whether target-assisted range stepping is enabled."), _("\
14388 If on, and the target supports it, when stepping a source line, GDB\n\
14389 tells the target to step the corresponding range of addresses itself instead\n\
14390 of issuing multiple single-steps. This speeds up source level\n\
14391 stepping. If off, GDB always issues single-steps, even if range\n\
14392 stepping is supported by the target. The default is on."),
14393 set_range_stepping
,
14394 show_range_stepping
,
14398 /* Eventually initialize fileio. See fileio.c */
14399 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14401 /* Take advantage of the fact that the TID field is not used, to tag
14402 special ptids with it set to != 0. */
14403 magic_null_ptid
= ptid_build (42000, -1, 1);
14404 not_sent_ptid
= ptid_build (42000, -2, 1);
14405 any_thread_ptid
= ptid_build (42000, 0, 1);