1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2017 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"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "filestuff.h"
50 #include "gdb_sys_time.h"
52 #include "event-loop.h"
53 #include "event-top.h"
59 #include "gdbcore.h" /* for exec_bfd */
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
73 #include "record-btrace.h"
75 #include "common/scoped_restore.h"
77 #include "common/byte-vector.h"
79 /* Per-program-space data key. */
80 static const struct program_space_data
*remote_pspace_data
;
82 /* The variable registered as the control variable used by the
83 remote exec-file commands. While the remote exec-file setting is
84 per-program-space, the set/show machinery uses this as the
85 location of the remote exec-file value. */
86 static char *remote_exec_file_var
;
88 /* The size to align memory write packets, when practical. The protocol
89 does not guarantee any alignment, and gdb will generate short
90 writes and unaligned writes, but even as a best-effort attempt this
91 can improve bulk transfers. For instance, if a write is misaligned
92 relative to the target's data bus, the stub may need to make an extra
93 round trip fetching data from the target. This doesn't make a
94 huge difference, but it's easy to do, so we try to be helpful.
96 The alignment chosen is arbitrary; usually data bus width is
97 important here, not the possibly larger cache line size. */
98 enum { REMOTE_ALIGN_WRITES
= 16 };
100 /* Prototypes for local functions. */
101 static int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
102 static int getpkt_or_notif_sane (char **buf
, long *sizeof_buf
,
103 int forever
, int *is_notif
);
105 static void remote_files_info (struct target_ops
*ignore
);
107 static void remote_prepare_to_store (struct target_ops
*self
,
108 struct regcache
*regcache
);
110 static void remote_open_1 (const char *, int, struct target_ops
*,
113 static void remote_close (struct target_ops
*self
);
117 static int remote_vkill (int pid
, struct remote_state
*rs
);
119 static void remote_kill_k (void);
121 static void remote_mourn (struct target_ops
*ops
);
123 static void extended_remote_restart (void);
125 static void remote_send (char **buf
, long *sizeof_buf_p
);
127 static int readchar (int timeout
);
129 static void remote_serial_write (const char *str
, int len
);
131 static void remote_kill (struct target_ops
*ops
);
133 static int remote_can_async_p (struct target_ops
*);
135 static int remote_is_async_p (struct target_ops
*);
137 static void remote_async (struct target_ops
*ops
, int enable
);
139 static void remote_thread_events (struct target_ops
*ops
, int enable
);
141 static void interrupt_query (void);
143 static void set_general_thread (ptid_t ptid
);
144 static void set_continue_thread (ptid_t ptid
);
146 static void get_offsets (void);
148 static void skip_frame (void);
150 static long read_frame (char **buf_p
, long *sizeof_buf
);
152 static int hexnumlen (ULONGEST num
);
154 static void init_remote_ops (void);
156 static void init_extended_remote_ops (void);
158 static void remote_stop (struct target_ops
*self
, ptid_t
);
160 static int stubhex (int ch
);
162 static int hexnumstr (char *, ULONGEST
);
164 static int hexnumnstr (char *, ULONGEST
, int);
166 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
168 static void print_packet (const char *);
170 static int stub_unpack_int (char *buff
, int fieldlength
);
172 static ptid_t
remote_current_thread (ptid_t oldptid
);
174 static int putpkt_binary (const char *buf
, int cnt
);
176 static void check_binary_download (CORE_ADDR addr
);
178 struct packet_config
;
180 static void show_packet_config_cmd (struct packet_config
*config
);
182 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
184 struct cmd_list_element
*c
,
187 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
188 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
190 static void remote_set_permissions (struct target_ops
*self
);
192 static int remote_get_trace_status (struct target_ops
*self
,
193 struct trace_status
*ts
);
195 static int remote_upload_tracepoints (struct target_ops
*self
,
196 struct uploaded_tp
**utpp
);
198 static int remote_upload_trace_state_variables (struct target_ops
*self
,
199 struct uploaded_tsv
**utsvp
);
201 static void remote_query_supported (void);
203 static void remote_check_symbols (void);
206 static void stop_reply_xfree (struct stop_reply
*);
207 static void remote_parse_stop_reply (char *, struct stop_reply
*);
208 static void push_stop_reply (struct stop_reply
*);
209 static void discard_pending_stop_replies_in_queue (struct remote_state
*);
210 static int peek_stop_reply (ptid_t ptid
);
212 struct threads_listing_context
;
213 static void remove_new_fork_children (struct threads_listing_context
*);
215 static void remote_async_inferior_event_handler (gdb_client_data
);
217 static void remote_terminal_ours (struct target_ops
*self
);
219 static int remote_read_description_p (struct target_ops
*target
);
221 static void remote_console_output (char *msg
);
223 static int remote_supports_cond_breakpoints (struct target_ops
*self
);
225 static int remote_can_run_breakpoint_commands (struct target_ops
*self
);
227 static void remote_btrace_reset (void);
229 static void remote_btrace_maybe_reopen (void);
231 static int stop_reply_queue_length (void);
233 static void readahead_cache_invalidate (void);
235 static void remote_unpush_and_throw (void);
237 static struct remote_state
*get_remote_state (void);
241 static struct cmd_list_element
*remote_cmdlist
;
243 /* For "set remote" and "show remote". */
245 static struct cmd_list_element
*remote_set_cmdlist
;
246 static struct cmd_list_element
*remote_show_cmdlist
;
248 /* Stub vCont actions support.
250 Each field is a boolean flag indicating whether the stub reports
251 support for the corresponding action. */
253 struct vCont_action_support
268 /* Controls whether GDB is willing to use range stepping. */
270 static int use_range_stepping
= 1;
272 #define OPAQUETHREADBYTES 8
274 /* a 64 bit opaque identifier */
275 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
277 /* About this many threadisds fit in a packet. */
279 #define MAXTHREADLISTRESULTS 32
281 /* The max number of chars in debug output. The rest of chars are
284 #define REMOTE_DEBUG_MAX_CHAR 512
286 /* Data for the vFile:pread readahead cache. */
288 struct readahead_cache
290 /* The file descriptor for the file that is being cached. -1 if the
294 /* The offset into the file that the cache buffer corresponds
298 /* The buffer holding the cache contents. */
300 /* The buffer's size. We try to read as much as fits into a packet
304 /* Cache hit and miss counters. */
309 /* Description of the remote protocol state for the currently
310 connected target. This is per-target state, and independent of the
311 selected architecture. */
315 /* A buffer to use for incoming packets, and its current size. The
316 buffer is grown dynamically for larger incoming packets.
317 Outgoing packets may also be constructed in this buffer.
318 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
319 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
324 /* True if we're going through initial connection setup (finding out
325 about the remote side's threads, relocating symbols, etc.). */
328 /* If we negotiated packet size explicitly (and thus can bypass
329 heuristics for the largest packet size that will not overflow
330 a buffer in the stub), this will be set to that packet size.
331 Otherwise zero, meaning to use the guessed size. */
332 long explicit_packet_size
;
334 /* remote_wait is normally called when the target is running and
335 waits for a stop reply packet. But sometimes we need to call it
336 when the target is already stopped. We can send a "?" packet
337 and have remote_wait read the response. Or, if we already have
338 the response, we can stash it in BUF and tell remote_wait to
339 skip calling getpkt. This flag is set when BUF contains a
340 stop reply packet and the target is not waiting. */
341 int cached_wait_status
;
343 /* True, if in no ack mode. That is, neither GDB nor the stub will
344 expect acks from each other. The connection is assumed to be
348 /* True if we're connected in extended remote mode. */
351 /* True if we resumed the target and we're waiting for the target to
352 stop. In the mean time, we can't start another command/query.
353 The remote server wouldn't be ready to process it, so we'd
354 timeout waiting for a reply that would never come and eventually
355 we'd close the connection. This can happen in asynchronous mode
356 because we allow GDB commands while the target is running. */
357 int waiting_for_stop_reply
;
359 /* The status of the stub support for the various vCont actions. */
360 struct vCont_action_support supports_vCont
;
362 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
363 responded to that. */
366 /* True if we saw a Ctrl-C while reading or writing from/to the
367 remote descriptor. At that point it is not safe to send a remote
368 interrupt packet, so we instead remember we saw the Ctrl-C and
369 process it once we're done with sending/receiving the current
370 packet, which should be shortly. If however that takes too long,
371 and the user presses Ctrl-C again, we offer to disconnect. */
372 int got_ctrlc_during_io
;
374 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
375 remote_open knows that we don't have a file open when the program
377 struct serial
*remote_desc
;
379 /* These are the threads which we last sent to the remote system. The
380 TID member will be -1 for all or -2 for not sent yet. */
381 ptid_t general_thread
;
382 ptid_t continue_thread
;
384 /* This is the traceframe which we last selected on the remote system.
385 It will be -1 if no traceframe is selected. */
386 int remote_traceframe_number
;
388 char *last_pass_packet
;
390 /* The last QProgramSignals packet sent to the target. We bypass
391 sending a new program signals list down to the target if the new
392 packet is exactly the same as the last we sent. IOW, we only let
393 the target know about program signals list changes. */
394 char *last_program_signals_packet
;
396 enum gdb_signal last_sent_signal
;
400 /* The execution direction of the last resume we got. */
401 enum exec_direction_kind last_resume_exec_dir
;
403 char *finished_object
;
404 char *finished_annex
;
405 ULONGEST finished_offset
;
407 /* Should we try the 'ThreadInfo' query packet?
409 This variable (NOT available to the user: auto-detect only!)
410 determines whether GDB will use the new, simpler "ThreadInfo"
411 query or the older, more complex syntax for thread queries.
412 This is an auto-detect variable (set to true at each connect,
413 and set to false when the target fails to recognize it). */
414 int use_threadinfo_query
;
415 int use_threadextra_query
;
417 threadref echo_nextthread
;
418 threadref nextthread
;
419 threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
421 /* The state of remote notification. */
422 struct remote_notif_state
*notif_state
;
424 /* The branch trace configuration. */
425 struct btrace_config btrace_config
;
427 /* The argument to the last "vFile:setfs:" packet we sent, used
428 to avoid sending repeated unnecessary "vFile:setfs:" packets.
429 Initialized to -1 to indicate that no "vFile:setfs:" packet
430 has yet been sent. */
433 /* A readahead cache for vFile:pread. Often, reading a binary
434 involves a sequence of small reads. E.g., when parsing an ELF
435 file. A readahead cache helps mostly the case of remote
436 debugging on a connection with higher latency, due to the
437 request/reply nature of the RSP. We only cache data for a single
438 file descriptor at a time. */
439 struct readahead_cache readahead_cache
;
442 /* Private data that we'll store in (struct thread_info)->priv. */
443 struct remote_thread_info
: public private_thread_info
449 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
450 sequence of bytes. */
451 gdb::byte_vector thread_handle
;
453 /* Whether the target stopped for a breakpoint/watchpoint. */
454 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
456 /* This is set to the data address of the access causing the target
457 to stop for a watchpoint. */
458 CORE_ADDR watch_data_address
= 0;
460 /* Fields used by the vCont action coalescing implemented in
461 remote_resume / remote_commit_resume. remote_resume stores each
462 thread's last resume request in these fields, so that a later
463 remote_commit_resume knows which is the proper action for this
464 thread to include in the vCont packet. */
466 /* True if the last target_resume call for this thread was a step
467 request, false if a continue request. */
468 int last_resume_step
= 0;
470 /* The signal specified in the last target_resume call for this
472 gdb_signal last_resume_sig
= GDB_SIGNAL_0
;
474 /* Whether this thread was already vCont-resumed on the remote
476 int vcont_resumed
= 0;
479 /* This data could be associated with a target, but we do not always
480 have access to the current target when we need it, so for now it is
481 static. This will be fine for as long as only one target is in use
483 static struct remote_state
*remote_state
;
485 static struct remote_state
*
486 get_remote_state_raw (void)
491 /* Allocate a new struct remote_state with xmalloc, initialize it, and
494 static struct remote_state
*
495 new_remote_state (void)
497 struct remote_state
*result
= XCNEW (struct remote_state
);
499 /* The default buffer size is unimportant; it will be expanded
500 whenever a larger buffer is needed. */
501 result
->buf_size
= 400;
502 result
->buf
= (char *) xmalloc (result
->buf_size
);
503 result
->remote_traceframe_number
= -1;
504 result
->last_sent_signal
= GDB_SIGNAL_0
;
505 result
->last_resume_exec_dir
= EXEC_FORWARD
;
511 /* Description of the remote protocol for a given architecture. */
515 long offset
; /* Offset into G packet. */
516 long regnum
; /* GDB's internal register number. */
517 LONGEST pnum
; /* Remote protocol register number. */
518 int in_g_packet
; /* Always part of G packet. */
519 /* long size in bytes; == register_size (target_gdbarch (), regnum);
521 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
525 struct remote_arch_state
527 /* Description of the remote protocol registers. */
528 long sizeof_g_packet
;
530 /* Description of the remote protocol registers indexed by REGNUM
531 (making an array gdbarch_num_regs in size). */
532 struct packet_reg
*regs
;
534 /* This is the size (in chars) of the first response to the ``g''
535 packet. It is used as a heuristic when determining the maximum
536 size of memory-read and memory-write packets. A target will
537 typically only reserve a buffer large enough to hold the ``g''
538 packet. The size does not include packet overhead (headers and
540 long actual_register_packet_size
;
542 /* This is the maximum size (in chars) of a non read/write packet.
543 It is also used as a cap on the size of read/write packets. */
544 long remote_packet_size
;
547 /* Utility: generate error from an incoming stub packet. */
549 trace_error (char *buf
)
552 return; /* not an error msg */
555 case '1': /* malformed packet error */
556 if (*++buf
== '0') /* general case: */
557 error (_("remote.c: error in outgoing packet."));
559 error (_("remote.c: error in outgoing packet at field #%ld."),
560 strtol (buf
, NULL
, 16));
562 error (_("Target returns error code '%s'."), buf
);
566 /* Utility: wait for reply from stub, while accepting "O" packets. */
569 remote_get_noisy_reply ()
571 struct remote_state
*rs
= get_remote_state ();
573 do /* Loop on reply from remote stub. */
577 QUIT
; /* Allow user to bail out with ^C. */
578 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
582 else if (startswith (buf
, "qRelocInsn:"))
585 CORE_ADDR from
, to
, org_to
;
587 int adjusted_size
= 0;
590 p
= buf
+ strlen ("qRelocInsn:");
591 pp
= unpack_varlen_hex (p
, &ul
);
593 error (_("invalid qRelocInsn packet: %s"), buf
);
597 unpack_varlen_hex (p
, &ul
);
604 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
607 CATCH (ex
, RETURN_MASK_ALL
)
609 if (ex
.error
== MEMORY_ERROR
)
611 /* Propagate memory errors silently back to the
612 target. The stub may have limited the range of
613 addresses we can write to, for example. */
617 /* Something unexpectedly bad happened. Be verbose
618 so we can tell what, and propagate the error back
619 to the stub, so it doesn't get stuck waiting for
621 exception_fprintf (gdb_stderr
, ex
,
622 _("warning: relocating instruction: "));
630 adjusted_size
= to
- org_to
;
632 xsnprintf (buf
, rs
->buf_size
, "qRelocInsn:%x", adjusted_size
);
636 else if (buf
[0] == 'O' && buf
[1] != 'K')
637 remote_console_output (buf
+ 1); /* 'O' message from stub */
639 return buf
; /* Here's the actual reply. */
644 /* Handle for retreving the remote protocol data from gdbarch. */
645 static struct gdbarch_data
*remote_gdbarch_data_handle
;
647 static struct remote_arch_state
*
648 get_remote_arch_state (struct gdbarch
*gdbarch
)
650 gdb_assert (gdbarch
!= NULL
);
651 return ((struct remote_arch_state
*)
652 gdbarch_data (gdbarch
, remote_gdbarch_data_handle
));
655 /* Fetch the global remote target state. */
657 static struct remote_state
*
658 get_remote_state (void)
660 /* Make sure that the remote architecture state has been
661 initialized, because doing so might reallocate rs->buf. Any
662 function which calls getpkt also needs to be mindful of changes
663 to rs->buf, but this call limits the number of places which run
665 get_remote_arch_state (target_gdbarch ());
667 return get_remote_state_raw ();
670 /* Cleanup routine for the remote module's pspace data. */
673 remote_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
675 char *remote_exec_file
= (char *) arg
;
677 xfree (remote_exec_file
);
680 /* Fetch the remote exec-file from the current program space. */
683 get_remote_exec_file (void)
685 char *remote_exec_file
;
688 = (char *) program_space_data (current_program_space
,
690 if (remote_exec_file
== NULL
)
693 return remote_exec_file
;
696 /* Set the remote exec file for PSPACE. */
699 set_pspace_remote_exec_file (struct program_space
*pspace
,
700 char *remote_exec_file
)
702 char *old_file
= (char *) program_space_data (pspace
, remote_pspace_data
);
705 set_program_space_data (pspace
, remote_pspace_data
,
706 xstrdup (remote_exec_file
));
709 /* The "set/show remote exec-file" set command hook. */
712 set_remote_exec_file (const char *ignored
, int from_tty
,
713 struct cmd_list_element
*c
)
715 gdb_assert (remote_exec_file_var
!= NULL
);
716 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
719 /* The "set/show remote exec-file" show command hook. */
722 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
723 struct cmd_list_element
*cmd
, const char *value
)
725 fprintf_filtered (file
, "%s\n", remote_exec_file_var
);
729 compare_pnums (const void *lhs_
, const void *rhs_
)
731 const struct packet_reg
* const *lhs
732 = (const struct packet_reg
* const *) lhs_
;
733 const struct packet_reg
* const *rhs
734 = (const struct packet_reg
* const *) rhs_
;
736 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
738 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
745 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
747 int regnum
, num_remote_regs
, offset
;
748 struct packet_reg
**remote_regs
;
750 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
752 struct packet_reg
*r
= ®s
[regnum
];
754 if (register_size (gdbarch
, regnum
) == 0)
755 /* Do not try to fetch zero-sized (placeholder) registers. */
758 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
763 /* Define the g/G packet format as the contents of each register
764 with a remote protocol number, in order of ascending protocol
767 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
768 for (num_remote_regs
= 0, regnum
= 0;
769 regnum
< gdbarch_num_regs (gdbarch
);
771 if (regs
[regnum
].pnum
!= -1)
772 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
774 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
777 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
779 remote_regs
[regnum
]->in_g_packet
= 1;
780 remote_regs
[regnum
]->offset
= offset
;
781 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
787 /* Given the architecture described by GDBARCH, return the remote
788 protocol register's number and the register's offset in the g/G
789 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
790 If the target does not have a mapping for REGNUM, return false,
791 otherwise, return true. */
794 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
795 int *pnum
, int *poffset
)
797 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
799 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
801 map_regcache_remote_table (gdbarch
, regs
.data ());
803 *pnum
= regs
[regnum
].pnum
;
804 *poffset
= regs
[regnum
].offset
;
810 init_remote_state (struct gdbarch
*gdbarch
)
812 struct remote_state
*rs
= get_remote_state_raw ();
813 struct remote_arch_state
*rsa
;
815 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
817 /* Use the architecture to build a regnum<->pnum table, which will be
818 1:1 unless a feature set specifies otherwise. */
819 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
820 gdbarch_num_regs (gdbarch
),
823 /* Record the maximum possible size of the g packet - it may turn out
825 rsa
->sizeof_g_packet
= map_regcache_remote_table (gdbarch
, rsa
->regs
);
827 /* Default maximum number of characters in a packet body. Many
828 remote stubs have a hardwired buffer size of 400 bytes
829 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
830 as the maximum packet-size to ensure that the packet and an extra
831 NUL character can always fit in the buffer. This stops GDB
832 trashing stubs that try to squeeze an extra NUL into what is
833 already a full buffer (As of 1999-12-04 that was most stubs). */
834 rsa
->remote_packet_size
= 400 - 1;
836 /* This one is filled in when a ``g'' packet is received. */
837 rsa
->actual_register_packet_size
= 0;
839 /* Should rsa->sizeof_g_packet needs more space than the
840 default, adjust the size accordingly. Remember that each byte is
841 encoded as two characters. 32 is the overhead for the packet
842 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
843 (``$NN:G...#NN'') is a better guess, the below has been padded a
845 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
846 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
848 /* Make sure that the packet buffer is plenty big enough for
849 this architecture. */
850 if (rs
->buf_size
< rsa
->remote_packet_size
)
852 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
853 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
859 /* Return the current allowed size of a remote packet. This is
860 inferred from the current architecture, and should be used to
861 limit the length of outgoing packets. */
863 get_remote_packet_size (void)
865 struct remote_state
*rs
= get_remote_state ();
866 remote_arch_state
*rsa
= get_remote_arch_state (target_gdbarch ());
868 if (rs
->explicit_packet_size
)
869 return rs
->explicit_packet_size
;
871 return rsa
->remote_packet_size
;
874 static struct packet_reg
*
875 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
878 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
882 struct packet_reg
*r
= &rsa
->regs
[regnum
];
884 gdb_assert (r
->regnum
== regnum
);
889 static struct packet_reg
*
890 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
895 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
897 struct packet_reg
*r
= &rsa
->regs
[i
];
905 static struct target_ops remote_ops
;
907 static struct target_ops extended_remote_ops
;
909 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
910 ``forever'' still use the normal timeout mechanism. This is
911 currently used by the ASYNC code to guarentee that target reads
912 during the initial connect always time-out. Once getpkt has been
913 modified to return a timeout indication and, in turn
914 remote_wait()/wait_for_inferior() have gained a timeout parameter
916 static int wait_forever_enabled_p
= 1;
918 /* Allow the user to specify what sequence to send to the remote
919 when he requests a program interruption: Although ^C is usually
920 what remote systems expect (this is the default, here), it is
921 sometimes preferable to send a break. On other systems such
922 as the Linux kernel, a break followed by g, which is Magic SysRq g
923 is required in order to interrupt the execution. */
924 const char interrupt_sequence_control_c
[] = "Ctrl-C";
925 const char interrupt_sequence_break
[] = "BREAK";
926 const char interrupt_sequence_break_g
[] = "BREAK-g";
927 static const char *const interrupt_sequence_modes
[] =
929 interrupt_sequence_control_c
,
930 interrupt_sequence_break
,
931 interrupt_sequence_break_g
,
934 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
937 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
938 struct cmd_list_element
*c
,
941 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
942 fprintf_filtered (file
,
943 _("Send the ASCII ETX character (Ctrl-c) "
944 "to the remote target to interrupt the "
945 "execution of the program.\n"));
946 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
947 fprintf_filtered (file
,
948 _("send a break signal to the remote target "
949 "to interrupt the execution of the program.\n"));
950 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
951 fprintf_filtered (file
,
952 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
953 "the remote target to interrupt the execution "
954 "of Linux kernel.\n"));
956 internal_error (__FILE__
, __LINE__
,
957 _("Invalid value for interrupt_sequence_mode: %s."),
958 interrupt_sequence_mode
);
961 /* This boolean variable specifies whether interrupt_sequence is sent
962 to the remote target when gdb connects to it.
963 This is mostly needed when you debug the Linux kernel: The Linux kernel
964 expects BREAK g which is Magic SysRq g for connecting gdb. */
965 static int interrupt_on_connect
= 0;
967 /* This variable is used to implement the "set/show remotebreak" commands.
968 Since these commands are now deprecated in favor of "set/show remote
969 interrupt-sequence", it no longer has any effect on the code. */
970 static int remote_break
;
973 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
976 interrupt_sequence_mode
= interrupt_sequence_break
;
978 interrupt_sequence_mode
= interrupt_sequence_control_c
;
982 show_remotebreak (struct ui_file
*file
, int from_tty
,
983 struct cmd_list_element
*c
,
988 /* This variable sets the number of bits in an address that are to be
989 sent in a memory ("M" or "m") packet. Normally, after stripping
990 leading zeros, the entire address would be sent. This variable
991 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
992 initial implementation of remote.c restricted the address sent in
993 memory packets to ``host::sizeof long'' bytes - (typically 32
994 bits). Consequently, for 64 bit targets, the upper 32 bits of an
995 address was never sent. Since fixing this bug may cause a break in
996 some remote targets this variable is principly provided to
997 facilitate backward compatibility. */
999 static unsigned int remote_address_size
;
1002 /* User configurable variables for the number of characters in a
1003 memory read/write packet. MIN (rsa->remote_packet_size,
1004 rsa->sizeof_g_packet) is the default. Some targets need smaller
1005 values (fifo overruns, et.al.) and some users need larger values
1006 (speed up transfers). The variables ``preferred_*'' (the user
1007 request), ``current_*'' (what was actually set) and ``forced_*''
1008 (Positive - a soft limit, negative - a hard limit). */
1010 struct memory_packet_config
1017 /* The default max memory-write-packet-size. The 16k is historical.
1018 (It came from older GDB's using alloca for buffers and the
1019 knowledge (folklore?) that some hosts don't cope very well with
1020 large alloca calls.) */
1021 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1023 /* The minimum remote packet size for memory transfers. Ensures we
1024 can write at least one byte. */
1025 #define MIN_MEMORY_PACKET_SIZE 20
1027 /* Compute the current size of a read/write packet. Since this makes
1028 use of ``actual_register_packet_size'' the computation is dynamic. */
1031 get_memory_packet_size (struct memory_packet_config
*config
)
1033 struct remote_state
*rs
= get_remote_state ();
1034 remote_arch_state
*rsa
= get_remote_arch_state (target_gdbarch ());
1037 if (config
->fixed_p
)
1039 if (config
->size
<= 0)
1040 what_they_get
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1042 what_they_get
= config
->size
;
1046 what_they_get
= get_remote_packet_size ();
1047 /* Limit the packet to the size specified by the user. */
1048 if (config
->size
> 0
1049 && what_they_get
> config
->size
)
1050 what_they_get
= config
->size
;
1052 /* Limit it to the size of the targets ``g'' response unless we have
1053 permission from the stub to use a larger packet size. */
1054 if (rs
->explicit_packet_size
== 0
1055 && rsa
->actual_register_packet_size
> 0
1056 && what_they_get
> rsa
->actual_register_packet_size
)
1057 what_they_get
= rsa
->actual_register_packet_size
;
1059 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1060 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1062 /* Make sure there is room in the global buffer for this packet
1063 (including its trailing NUL byte). */
1064 if (rs
->buf_size
< what_they_get
+ 1)
1066 rs
->buf_size
= 2 * what_they_get
;
1067 rs
->buf
= (char *) xrealloc (rs
->buf
, 2 * what_they_get
);
1070 return what_they_get
;
1073 /* Update the size of a read/write packet. If they user wants
1074 something really big then do a sanity check. */
1077 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1079 int fixed_p
= config
->fixed_p
;
1080 long size
= config
->size
;
1083 error (_("Argument required (integer, `fixed' or `limited')."));
1084 else if (strcmp (args
, "hard") == 0
1085 || strcmp (args
, "fixed") == 0)
1087 else if (strcmp (args
, "soft") == 0
1088 || strcmp (args
, "limit") == 0)
1094 size
= strtoul (args
, &end
, 0);
1096 error (_("Invalid %s (bad syntax)."), config
->name
);
1098 /* Instead of explicitly capping the size of a packet to or
1099 disallowing it, the user is allowed to set the size to
1100 something arbitrarily large. */
1103 /* So that the query shows the correct value. */
1105 size
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1108 if (fixed_p
&& !config
->fixed_p
)
1110 if (! query (_("The target may not be able to correctly handle a %s\n"
1111 "of %ld bytes. Change the packet size? "),
1112 config
->name
, size
))
1113 error (_("Packet size not changed."));
1115 /* Update the config. */
1116 config
->fixed_p
= fixed_p
;
1117 config
->size
= size
;
1121 show_memory_packet_size (struct memory_packet_config
*config
)
1123 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1124 if (config
->fixed_p
)
1125 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1126 get_memory_packet_size (config
));
1128 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1129 get_memory_packet_size (config
));
1132 static struct memory_packet_config memory_write_packet_config
=
1134 "memory-write-packet-size",
1138 set_memory_write_packet_size (const char *args
, int from_tty
)
1140 set_memory_packet_size (args
, &memory_write_packet_config
);
1144 show_memory_write_packet_size (const char *args
, int from_tty
)
1146 show_memory_packet_size (&memory_write_packet_config
);
1150 get_memory_write_packet_size (void)
1152 return get_memory_packet_size (&memory_write_packet_config
);
1155 static struct memory_packet_config memory_read_packet_config
=
1157 "memory-read-packet-size",
1161 set_memory_read_packet_size (const char *args
, int from_tty
)
1163 set_memory_packet_size (args
, &memory_read_packet_config
);
1167 show_memory_read_packet_size (const char *args
, int from_tty
)
1169 show_memory_packet_size (&memory_read_packet_config
);
1173 get_memory_read_packet_size (void)
1175 long size
= get_memory_packet_size (&memory_read_packet_config
);
1177 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1178 extra buffer size argument before the memory read size can be
1179 increased beyond this. */
1180 if (size
> get_remote_packet_size ())
1181 size
= get_remote_packet_size ();
1186 /* Generic configuration support for packets the stub optionally
1187 supports. Allows the user to specify the use of the packet as well
1188 as allowing GDB to auto-detect support in the remote stub. */
1192 PACKET_SUPPORT_UNKNOWN
= 0,
1197 struct packet_config
1202 /* If auto, GDB auto-detects support for this packet or feature,
1203 either through qSupported, or by trying the packet and looking
1204 at the response. If true, GDB assumes the target supports this
1205 packet. If false, the packet is disabled. Configs that don't
1206 have an associated command always have this set to auto. */
1207 enum auto_boolean detect
;
1209 /* Does the target support this packet? */
1210 enum packet_support support
;
1213 /* Analyze a packet's return value and update the packet config
1223 static enum packet_support
packet_config_support (struct packet_config
*config
);
1224 static enum packet_support
packet_support (int packet
);
1227 show_packet_config_cmd (struct packet_config
*config
)
1229 const char *support
= "internal-error";
1231 switch (packet_config_support (config
))
1234 support
= "enabled";
1236 case PACKET_DISABLE
:
1237 support
= "disabled";
1239 case PACKET_SUPPORT_UNKNOWN
:
1240 support
= "unknown";
1243 switch (config
->detect
)
1245 case AUTO_BOOLEAN_AUTO
:
1246 printf_filtered (_("Support for the `%s' packet "
1247 "is auto-detected, currently %s.\n"),
1248 config
->name
, support
);
1250 case AUTO_BOOLEAN_TRUE
:
1251 case AUTO_BOOLEAN_FALSE
:
1252 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1253 config
->name
, support
);
1259 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1260 const char *title
, int legacy
)
1266 config
->name
= name
;
1267 config
->title
= title
;
1268 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1270 show_doc
= xstrprintf ("Show current use of remote "
1271 "protocol `%s' (%s) packet",
1273 /* set/show TITLE-packet {auto,on,off} */
1274 cmd_name
= xstrprintf ("%s-packet", title
);
1275 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1276 &config
->detect
, set_doc
,
1277 show_doc
, NULL
, /* help_doc */
1279 show_remote_protocol_packet_cmd
,
1280 &remote_set_cmdlist
, &remote_show_cmdlist
);
1281 /* The command code copies the documentation strings. */
1284 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1289 legacy_name
= xstrprintf ("%s-packet", name
);
1290 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1291 &remote_set_cmdlist
);
1292 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1293 &remote_show_cmdlist
);
1297 static enum packet_result
1298 packet_check_result (const char *buf
)
1302 /* The stub recognized the packet request. Check that the
1303 operation succeeded. */
1305 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1307 /* "Enn" - definitly an error. */
1308 return PACKET_ERROR
;
1310 /* Always treat "E." as an error. This will be used for
1311 more verbose error messages, such as E.memtypes. */
1312 if (buf
[0] == 'E' && buf
[1] == '.')
1313 return PACKET_ERROR
;
1315 /* The packet may or may not be OK. Just assume it is. */
1319 /* The stub does not support the packet. */
1320 return PACKET_UNKNOWN
;
1323 static enum packet_result
1324 packet_ok (const char *buf
, struct packet_config
*config
)
1326 enum packet_result result
;
1328 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1329 && config
->support
== PACKET_DISABLE
)
1330 internal_error (__FILE__
, __LINE__
,
1331 _("packet_ok: attempt to use a disabled packet"));
1333 result
= packet_check_result (buf
);
1338 /* The stub recognized the packet request. */
1339 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1342 fprintf_unfiltered (gdb_stdlog
,
1343 "Packet %s (%s) is supported\n",
1344 config
->name
, config
->title
);
1345 config
->support
= PACKET_ENABLE
;
1348 case PACKET_UNKNOWN
:
1349 /* The stub does not support the packet. */
1350 if (config
->detect
== AUTO_BOOLEAN_AUTO
1351 && config
->support
== PACKET_ENABLE
)
1353 /* If the stub previously indicated that the packet was
1354 supported then there is a protocol error. */
1355 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1356 config
->name
, config
->title
);
1358 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1360 /* The user set it wrong. */
1361 error (_("Enabled packet %s (%s) not recognized by stub"),
1362 config
->name
, config
->title
);
1366 fprintf_unfiltered (gdb_stdlog
,
1367 "Packet %s (%s) is NOT supported\n",
1368 config
->name
, config
->title
);
1369 config
->support
= PACKET_DISABLE
;
1390 PACKET_vFile_pwrite
,
1392 PACKET_vFile_unlink
,
1393 PACKET_vFile_readlink
,
1396 PACKET_qXfer_features
,
1397 PACKET_qXfer_exec_file
,
1398 PACKET_qXfer_libraries
,
1399 PACKET_qXfer_libraries_svr4
,
1400 PACKET_qXfer_memory_map
,
1401 PACKET_qXfer_spu_read
,
1402 PACKET_qXfer_spu_write
,
1403 PACKET_qXfer_osdata
,
1404 PACKET_qXfer_threads
,
1405 PACKET_qXfer_statictrace_read
,
1406 PACKET_qXfer_traceframe_info
,
1412 PACKET_QPassSignals
,
1413 PACKET_QCatchSyscalls
,
1414 PACKET_QProgramSignals
,
1415 PACKET_QSetWorkingDir
,
1416 PACKET_QStartupWithShell
,
1417 PACKET_QEnvironmentHexEncoded
,
1418 PACKET_QEnvironmentReset
,
1419 PACKET_QEnvironmentUnset
,
1421 PACKET_qSearch_memory
,
1424 PACKET_QStartNoAckMode
,
1426 PACKET_qXfer_siginfo_read
,
1427 PACKET_qXfer_siginfo_write
,
1430 /* Support for conditional tracepoints. */
1431 PACKET_ConditionalTracepoints
,
1433 /* Support for target-side breakpoint conditions. */
1434 PACKET_ConditionalBreakpoints
,
1436 /* Support for target-side breakpoint commands. */
1437 PACKET_BreakpointCommands
,
1439 /* Support for fast tracepoints. */
1440 PACKET_FastTracepoints
,
1442 /* Support for static tracepoints. */
1443 PACKET_StaticTracepoints
,
1445 /* Support for installing tracepoints while a trace experiment is
1447 PACKET_InstallInTrace
,
1451 PACKET_TracepointSource
,
1454 PACKET_QDisableRandomization
,
1456 PACKET_QTBuffer_size
,
1460 PACKET_qXfer_btrace
,
1462 /* Support for the QNonStop packet. */
1465 /* Support for the QThreadEvents packet. */
1466 PACKET_QThreadEvents
,
1468 /* Support for multi-process extensions. */
1469 PACKET_multiprocess_feature
,
1471 /* Support for enabling and disabling tracepoints while a trace
1472 experiment is running. */
1473 PACKET_EnableDisableTracepoints_feature
,
1475 /* Support for collecting strings using the tracenz bytecode. */
1476 PACKET_tracenz_feature
,
1478 /* Support for continuing to run a trace experiment while GDB is
1480 PACKET_DisconnectedTracing_feature
,
1482 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1483 PACKET_augmented_libraries_svr4_read_feature
,
1485 /* Support for the qXfer:btrace-conf:read packet. */
1486 PACKET_qXfer_btrace_conf
,
1488 /* Support for the Qbtrace-conf:bts:size packet. */
1489 PACKET_Qbtrace_conf_bts_size
,
1491 /* Support for swbreak+ feature. */
1492 PACKET_swbreak_feature
,
1494 /* Support for hwbreak+ feature. */
1495 PACKET_hwbreak_feature
,
1497 /* Support for fork events. */
1498 PACKET_fork_event_feature
,
1500 /* Support for vfork events. */
1501 PACKET_vfork_event_feature
,
1503 /* Support for the Qbtrace-conf:pt:size packet. */
1504 PACKET_Qbtrace_conf_pt_size
,
1506 /* Support for exec events. */
1507 PACKET_exec_event_feature
,
1509 /* Support for query supported vCont actions. */
1510 PACKET_vContSupported
,
1512 /* Support remote CTRL-C. */
1515 /* Support TARGET_WAITKIND_NO_RESUMED. */
1521 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1523 /* Returns the packet's corresponding "set remote foo-packet" command
1524 state. See struct packet_config for more details. */
1526 static enum auto_boolean
1527 packet_set_cmd_state (int packet
)
1529 return remote_protocol_packets
[packet
].detect
;
1532 /* Returns whether a given packet or feature is supported. This takes
1533 into account the state of the corresponding "set remote foo-packet"
1534 command, which may be used to bypass auto-detection. */
1536 static enum packet_support
1537 packet_config_support (struct packet_config
*config
)
1539 switch (config
->detect
)
1541 case AUTO_BOOLEAN_TRUE
:
1542 return PACKET_ENABLE
;
1543 case AUTO_BOOLEAN_FALSE
:
1544 return PACKET_DISABLE
;
1545 case AUTO_BOOLEAN_AUTO
:
1546 return config
->support
;
1548 gdb_assert_not_reached (_("bad switch"));
1552 /* Same as packet_config_support, but takes the packet's enum value as
1555 static enum packet_support
1556 packet_support (int packet
)
1558 struct packet_config
*config
= &remote_protocol_packets
[packet
];
1560 return packet_config_support (config
);
1564 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1565 struct cmd_list_element
*c
,
1568 struct packet_config
*packet
;
1570 for (packet
= remote_protocol_packets
;
1571 packet
< &remote_protocol_packets
[PACKET_MAX
];
1574 if (&packet
->detect
== c
->var
)
1576 show_packet_config_cmd (packet
);
1580 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1584 /* Should we try one of the 'Z' requests? */
1588 Z_PACKET_SOFTWARE_BP
,
1589 Z_PACKET_HARDWARE_BP
,
1596 /* For compatibility with older distributions. Provide a ``set remote
1597 Z-packet ...'' command that updates all the Z packet types. */
1599 static enum auto_boolean remote_Z_packet_detect
;
1602 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
1603 struct cmd_list_element
*c
)
1607 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1608 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1612 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1613 struct cmd_list_element
*c
,
1618 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1620 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1624 /* Returns true if the multi-process extensions are in effect. */
1627 remote_multi_process_p (struct remote_state
*rs
)
1629 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
1632 /* Returns true if fork events are supported. */
1635 remote_fork_event_p (struct remote_state
*rs
)
1637 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
1640 /* Returns true if vfork events are supported. */
1643 remote_vfork_event_p (struct remote_state
*rs
)
1645 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
1648 /* Returns true if exec events are supported. */
1651 remote_exec_event_p (struct remote_state
*rs
)
1653 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
1656 /* Insert fork catchpoint target routine. If fork events are enabled
1657 then return success, nothing more to do. */
1660 remote_insert_fork_catchpoint (struct target_ops
*ops
, int pid
)
1662 struct remote_state
*rs
= get_remote_state ();
1664 return !remote_fork_event_p (rs
);
1667 /* Remove fork catchpoint target routine. Nothing to do, just
1671 remote_remove_fork_catchpoint (struct target_ops
*ops
, int pid
)
1676 /* Insert vfork catchpoint target routine. If vfork events are enabled
1677 then return success, nothing more to do. */
1680 remote_insert_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1682 struct remote_state
*rs
= get_remote_state ();
1684 return !remote_vfork_event_p (rs
);
1687 /* Remove vfork catchpoint target routine. Nothing to do, just
1691 remote_remove_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1696 /* Insert exec catchpoint target routine. If exec events are
1697 enabled, just return success. */
1700 remote_insert_exec_catchpoint (struct target_ops
*ops
, int pid
)
1702 struct remote_state
*rs
= get_remote_state ();
1704 return !remote_exec_event_p (rs
);
1707 /* Remove exec catchpoint target routine. Nothing to do, just
1711 remote_remove_exec_catchpoint (struct target_ops
*ops
, int pid
)
1717 /* Asynchronous signal handle registered as event loop source for
1718 when we have pending events ready to be passed to the core. */
1720 static struct async_event_handler
*remote_async_inferior_event_token
;
1724 static ptid_t magic_null_ptid
;
1725 static ptid_t not_sent_ptid
;
1726 static ptid_t any_thread_ptid
;
1728 /* Find out if the stub attached to PID (and hence GDB should offer to
1729 detach instead of killing it when bailing out). */
1732 remote_query_attached (int pid
)
1734 struct remote_state
*rs
= get_remote_state ();
1735 size_t size
= get_remote_packet_size ();
1737 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
1740 if (remote_multi_process_p (rs
))
1741 xsnprintf (rs
->buf
, size
, "qAttached:%x", pid
);
1743 xsnprintf (rs
->buf
, size
, "qAttached");
1746 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1748 switch (packet_ok (rs
->buf
,
1749 &remote_protocol_packets
[PACKET_qAttached
]))
1752 if (strcmp (rs
->buf
, "1") == 0)
1756 warning (_("Remote failure reply: %s"), rs
->buf
);
1758 case PACKET_UNKNOWN
:
1765 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1766 has been invented by GDB, instead of reported by the target. Since
1767 we can be connected to a remote system before before knowing about
1768 any inferior, mark the target with execution when we find the first
1769 inferior. If ATTACHED is 1, then we had just attached to this
1770 inferior. If it is 0, then we just created this inferior. If it
1771 is -1, then try querying the remote stub to find out if it had
1772 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1773 attempt to open this inferior's executable as the main executable
1774 if no main executable is open already. */
1776 static struct inferior
*
1777 remote_add_inferior (int fake_pid_p
, int pid
, int attached
,
1780 struct inferior
*inf
;
1782 /* Check whether this process we're learning about is to be
1783 considered attached, or if is to be considered to have been
1784 spawned by the stub. */
1786 attached
= remote_query_attached (pid
);
1788 if (gdbarch_has_global_solist (target_gdbarch ()))
1790 /* If the target shares code across all inferiors, then every
1791 attach adds a new inferior. */
1792 inf
= add_inferior (pid
);
1794 /* ... and every inferior is bound to the same program space.
1795 However, each inferior may still have its own address
1797 inf
->aspace
= maybe_new_address_space ();
1798 inf
->pspace
= current_program_space
;
1802 /* In the traditional debugging scenario, there's a 1-1 match
1803 between program/address spaces. We simply bind the inferior
1804 to the program space's address space. */
1805 inf
= current_inferior ();
1806 inferior_appeared (inf
, pid
);
1809 inf
->attach_flag
= attached
;
1810 inf
->fake_pid_p
= fake_pid_p
;
1812 /* If no main executable is currently open then attempt to
1813 open the file that was executed to create this inferior. */
1814 if (try_open_exec
&& get_exec_file (0) == NULL
)
1815 exec_file_locate_attach (pid
, 0, 1);
1820 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
1822 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1823 according to RUNNING. */
1826 remote_add_thread (ptid_t ptid
, int running
, int executing
)
1828 struct remote_state
*rs
= get_remote_state ();
1829 struct thread_info
*thread
;
1831 /* GDB historically didn't pull threads in the initial connection
1832 setup. If the remote target doesn't even have a concept of
1833 threads (e.g., a bare-metal target), even if internally we
1834 consider that a single-threaded target, mentioning a new thread
1835 might be confusing to the user. Be silent then, preserving the
1836 age old behavior. */
1837 if (rs
->starting_up
)
1838 thread
= add_thread_silent (ptid
);
1840 thread
= add_thread (ptid
);
1842 get_remote_thread_info (thread
)->vcont_resumed
= executing
;
1843 set_executing (ptid
, executing
);
1844 set_running (ptid
, running
);
1847 /* Come here when we learn about a thread id from the remote target.
1848 It may be the first time we hear about such thread, so take the
1849 opportunity to add it to GDB's thread list. In case this is the
1850 first time we're noticing its corresponding inferior, add it to
1851 GDB's inferior list as well. EXECUTING indicates whether the
1852 thread is (internally) executing or stopped. */
1855 remote_notice_new_inferior (ptid_t currthread
, int executing
)
1857 /* In non-stop mode, we assume new found threads are (externally)
1858 running until proven otherwise with a stop reply. In all-stop,
1859 we can only get here if all threads are stopped. */
1860 int running
= target_is_non_stop_p () ? 1 : 0;
1862 /* If this is a new thread, add it to GDB's thread list.
1863 If we leave it up to WFI to do this, bad things will happen. */
1865 if (in_thread_list (currthread
) && is_exited (currthread
))
1867 /* We're seeing an event on a thread id we knew had exited.
1868 This has to be a new thread reusing the old id. Add it. */
1869 remote_add_thread (currthread
, running
, executing
);
1873 if (!in_thread_list (currthread
))
1875 struct inferior
*inf
= NULL
;
1876 int pid
= ptid_get_pid (currthread
);
1878 if (ptid_is_pid (inferior_ptid
)
1879 && pid
== ptid_get_pid (inferior_ptid
))
1881 /* inferior_ptid has no thread member yet. This can happen
1882 with the vAttach -> remote_wait,"TAAthread:" path if the
1883 stub doesn't support qC. This is the first stop reported
1884 after an attach, so this is the main thread. Update the
1885 ptid in the thread list. */
1886 if (in_thread_list (pid_to_ptid (pid
)))
1887 thread_change_ptid (inferior_ptid
, currthread
);
1890 remote_add_thread (currthread
, running
, executing
);
1891 inferior_ptid
= currthread
;
1896 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1898 /* inferior_ptid is not set yet. This can happen with the
1899 vRun -> remote_wait,"TAAthread:" path if the stub
1900 doesn't support qC. This is the first stop reported
1901 after an attach, so this is the main thread. Update the
1902 ptid in the thread list. */
1903 thread_change_ptid (inferior_ptid
, currthread
);
1907 /* When connecting to a target remote, or to a target
1908 extended-remote which already was debugging an inferior, we
1909 may not know about it yet. Add it before adding its child
1910 thread, so notifications are emitted in a sensible order. */
1911 if (!in_inferior_list (ptid_get_pid (currthread
)))
1913 struct remote_state
*rs
= get_remote_state ();
1914 int fake_pid_p
= !remote_multi_process_p (rs
);
1916 inf
= remote_add_inferior (fake_pid_p
,
1917 ptid_get_pid (currthread
), -1, 1);
1920 /* This is really a new thread. Add it. */
1921 remote_add_thread (currthread
, running
, executing
);
1923 /* If we found a new inferior, let the common code do whatever
1924 it needs to with it (e.g., read shared libraries, insert
1925 breakpoints), unless we're just setting up an all-stop
1929 struct remote_state
*rs
= get_remote_state ();
1931 if (!rs
->starting_up
)
1932 notice_new_inferior (currthread
, executing
, 0);
1937 /* Return THREAD's private thread data, creating it if necessary. */
1939 static remote_thread_info
*
1940 get_remote_thread_info (thread_info
*thread
)
1942 gdb_assert (thread
!= NULL
);
1944 if (thread
->priv
== NULL
)
1945 thread
->priv
.reset (new remote_thread_info
);
1947 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
1950 /* Return PTID's private thread data, creating it if necessary. */
1952 static remote_thread_info
*
1953 get_remote_thread_info (ptid_t ptid
)
1955 struct thread_info
*info
= find_thread_ptid (ptid
);
1957 return get_remote_thread_info (info
);
1960 /* Call this function as a result of
1961 1) A halt indication (T packet) containing a thread id
1962 2) A direct query of currthread
1963 3) Successful execution of set thread */
1966 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
1968 rs
->general_thread
= currthread
;
1971 /* If 'QPassSignals' is supported, tell the remote stub what signals
1972 it can simply pass through to the inferior without reporting. */
1975 remote_pass_signals (struct target_ops
*self
,
1976 int numsigs
, unsigned char *pass_signals
)
1978 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
1980 char *pass_packet
, *p
;
1982 struct remote_state
*rs
= get_remote_state ();
1984 gdb_assert (numsigs
< 256);
1985 for (i
= 0; i
< numsigs
; i
++)
1987 if (pass_signals
[i
])
1990 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1991 strcpy (pass_packet
, "QPassSignals:");
1992 p
= pass_packet
+ strlen (pass_packet
);
1993 for (i
= 0; i
< numsigs
; i
++)
1995 if (pass_signals
[i
])
1998 *p
++ = tohex (i
>> 4);
1999 *p
++ = tohex (i
& 15);
2008 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2010 putpkt (pass_packet
);
2011 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2012 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2013 if (rs
->last_pass_packet
)
2014 xfree (rs
->last_pass_packet
);
2015 rs
->last_pass_packet
= pass_packet
;
2018 xfree (pass_packet
);
2022 /* If 'QCatchSyscalls' is supported, tell the remote stub
2023 to report syscalls to GDB. */
2026 remote_set_syscall_catchpoint (struct target_ops
*self
,
2027 int pid
, int needed
, int any_count
,
2028 int table_size
, int *table
)
2030 const char *catch_packet
;
2031 enum packet_result result
;
2034 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2036 /* Not supported. */
2040 if (needed
&& !any_count
)
2044 /* Count how many syscalls are to be caught (table[sysno] != 0). */
2045 for (i
= 0; i
< table_size
; i
++)
2054 fprintf_unfiltered (gdb_stdlog
,
2055 "remote_set_syscall_catchpoint "
2056 "pid %d needed %d any_count %d n_sysno %d\n",
2057 pid
, needed
, any_count
, n_sysno
);
2060 std::string built_packet
;
2063 /* Prepare a packet with the sysno list, assuming max 8+1
2064 characters for a sysno. If the resulting packet size is too
2065 big, fallback on the non-selective packet. */
2066 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2067 built_packet
.reserve (maxpktsz
);
2068 built_packet
= "QCatchSyscalls:1";
2071 /* Add in catch_packet each syscall to be caught (table[i] != 0). */
2072 for (int i
= 0; i
< table_size
; i
++)
2075 string_appendf (built_packet
, ";%x", i
);
2078 if (built_packet
.size () > get_remote_packet_size ())
2080 /* catch_packet too big. Fallback to less efficient
2081 non selective mode, with GDB doing the filtering. */
2082 catch_packet
= "QCatchSyscalls:1";
2085 catch_packet
= built_packet
.c_str ();
2088 catch_packet
= "QCatchSyscalls:0";
2090 struct remote_state
*rs
= get_remote_state ();
2092 putpkt (catch_packet
);
2093 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2094 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2095 if (result
== PACKET_OK
)
2101 /* If 'QProgramSignals' is supported, tell the remote stub what
2102 signals it should pass through to the inferior when detaching. */
2105 remote_program_signals (struct target_ops
*self
,
2106 int numsigs
, unsigned char *signals
)
2108 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2112 struct remote_state
*rs
= get_remote_state ();
2114 gdb_assert (numsigs
< 256);
2115 for (i
= 0; i
< numsigs
; i
++)
2120 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2121 strcpy (packet
, "QProgramSignals:");
2122 p
= packet
+ strlen (packet
);
2123 for (i
= 0; i
< numsigs
; i
++)
2125 if (signal_pass_state (i
))
2128 *p
++ = tohex (i
>> 4);
2129 *p
++ = tohex (i
& 15);
2138 if (!rs
->last_program_signals_packet
2139 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2142 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2143 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2144 xfree (rs
->last_program_signals_packet
);
2145 rs
->last_program_signals_packet
= packet
;
2152 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2153 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2154 thread. If GEN is set, set the general thread, if not, then set
2155 the step/continue thread. */
2157 set_thread (ptid_t ptid
, int gen
)
2159 struct remote_state
*rs
= get_remote_state ();
2160 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2161 char *buf
= rs
->buf
;
2162 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
2164 if (ptid_equal (state
, ptid
))
2168 *buf
++ = gen
? 'g' : 'c';
2169 if (ptid_equal (ptid
, magic_null_ptid
))
2170 xsnprintf (buf
, endbuf
- buf
, "0");
2171 else if (ptid_equal (ptid
, any_thread_ptid
))
2172 xsnprintf (buf
, endbuf
- buf
, "0");
2173 else if (ptid_equal (ptid
, minus_one_ptid
))
2174 xsnprintf (buf
, endbuf
- buf
, "-1");
2176 write_ptid (buf
, endbuf
, ptid
);
2178 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2180 rs
->general_thread
= ptid
;
2182 rs
->continue_thread
= ptid
;
2186 set_general_thread (ptid_t ptid
)
2188 set_thread (ptid
, 1);
2192 set_continue_thread (ptid_t ptid
)
2194 set_thread (ptid
, 0);
2197 /* Change the remote current process. Which thread within the process
2198 ends up selected isn't important, as long as it is the same process
2199 as what INFERIOR_PTID points to.
2201 This comes from that fact that there is no explicit notion of
2202 "selected process" in the protocol. The selected process for
2203 general operations is the process the selected general thread
2207 set_general_process (void)
2209 struct remote_state
*rs
= get_remote_state ();
2211 /* If the remote can't handle multiple processes, don't bother. */
2212 if (!remote_multi_process_p (rs
))
2215 /* We only need to change the remote current thread if it's pointing
2216 at some other process. */
2217 if (ptid_get_pid (rs
->general_thread
) != ptid_get_pid (inferior_ptid
))
2218 set_general_thread (inferior_ptid
);
2222 /* Return nonzero if this is the main thread that we made up ourselves
2223 to model non-threaded targets as single-threaded. */
2226 remote_thread_always_alive (struct target_ops
*ops
, ptid_t ptid
)
2228 if (ptid_equal (ptid
, magic_null_ptid
))
2229 /* The main thread is always alive. */
2232 if (ptid_get_pid (ptid
) != 0 && ptid_get_lwp (ptid
) == 0)
2233 /* The main thread is always alive. This can happen after a
2234 vAttach, if the remote side doesn't support
2241 /* Return nonzero if the thread PTID is still alive on the remote
2245 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2247 struct remote_state
*rs
= get_remote_state ();
2250 /* Check if this is a thread that we made up ourselves to model
2251 non-threaded targets as single-threaded. */
2252 if (remote_thread_always_alive (ops
, ptid
))
2256 endp
= rs
->buf
+ get_remote_packet_size ();
2259 write_ptid (p
, endp
, ptid
);
2262 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2263 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2266 /* Return a pointer to a thread name if we know it and NULL otherwise.
2267 The thread_info object owns the memory for the name. */
2270 remote_thread_name (struct target_ops
*ops
, struct thread_info
*info
)
2272 if (info
->priv
!= NULL
)
2273 return get_remote_thread_info (info
)->name
.c_str ();
2278 /* About these extended threadlist and threadinfo packets. They are
2279 variable length packets but, the fields within them are often fixed
2280 length. They are redundent enough to send over UDP as is the
2281 remote protocol in general. There is a matching unit test module
2284 /* WARNING: This threadref data structure comes from the remote O.S.,
2285 libstub protocol encoding, and remote.c. It is not particularly
2288 /* Right now, the internal structure is int. We want it to be bigger.
2289 Plan to fix this. */
2291 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2293 /* gdb_ext_thread_info is an internal GDB data structure which is
2294 equivalent to the reply of the remote threadinfo packet. */
2296 struct gdb_ext_thread_info
2298 threadref threadid
; /* External form of thread reference. */
2299 int active
; /* Has state interesting to GDB?
2301 char display
[256]; /* Brief state display, name,
2302 blocked/suspended. */
2303 char shortname
[32]; /* To be used to name threads. */
2304 char more_display
[256]; /* Long info, statistics, queue depth,
2308 /* The volume of remote transfers can be limited by submitting
2309 a mask containing bits specifying the desired information.
2310 Use a union of these values as the 'selection' parameter to
2311 get_thread_info. FIXME: Make these TAG names more thread specific. */
2313 #define TAG_THREADID 1
2314 #define TAG_EXISTS 2
2315 #define TAG_DISPLAY 4
2316 #define TAG_THREADNAME 8
2317 #define TAG_MOREDISPLAY 16
2319 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2321 static char *unpack_nibble (char *buf
, int *val
);
2323 static char *unpack_byte (char *buf
, int *value
);
2325 static char *pack_int (char *buf
, int value
);
2327 static char *unpack_int (char *buf
, int *value
);
2329 static char *unpack_string (char *src
, char *dest
, int length
);
2331 static char *pack_threadid (char *pkt
, threadref
*id
);
2333 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2335 void int_to_threadref (threadref
*id
, int value
);
2337 static int threadref_to_int (threadref
*ref
);
2339 static void copy_threadref (threadref
*dest
, threadref
*src
);
2341 static int threadmatch (threadref
*dest
, threadref
*src
);
2343 static char *pack_threadinfo_request (char *pkt
, int mode
,
2346 static int remote_unpack_thread_info_response (char *pkt
,
2347 threadref
*expectedref
,
2348 struct gdb_ext_thread_info
2352 static int remote_get_threadinfo (threadref
*threadid
,
2353 int fieldset
, /*TAG mask */
2354 struct gdb_ext_thread_info
*info
);
2356 static char *pack_threadlist_request (char *pkt
, int startflag
,
2358 threadref
*nextthread
);
2360 static int parse_threadlist_response (char *pkt
,
2362 threadref
*original_echo
,
2363 threadref
*resultlist
,
2366 static int remote_get_threadlist (int startflag
,
2367 threadref
*nextthread
,
2371 threadref
*threadlist
);
2373 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
2375 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
2376 void *context
, int looplimit
);
2378 static int remote_newthread_step (threadref
*ref
, void *context
);
2381 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2382 buffer we're allowed to write to. Returns
2383 BUF+CHARACTERS_WRITTEN. */
2386 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2389 struct remote_state
*rs
= get_remote_state ();
2391 if (remote_multi_process_p (rs
))
2393 pid
= ptid_get_pid (ptid
);
2395 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2397 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2399 tid
= ptid_get_lwp (ptid
);
2401 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2403 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2408 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2409 last parsed char. Returns null_ptid if no thread id is found, and
2410 throws an error if the thread id has an invalid format. */
2413 read_ptid (const char *buf
, const char **obuf
)
2415 const char *p
= buf
;
2417 ULONGEST pid
= 0, tid
= 0;
2421 /* Multi-process ptid. */
2422 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2424 error (_("invalid remote ptid: %s"), p
);
2427 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2430 return ptid_build (pid
, tid
, 0);
2433 /* No multi-process. Just a tid. */
2434 pp
= unpack_varlen_hex (p
, &tid
);
2436 /* Return null_ptid when no thread id is found. */
2444 /* Since the stub is not sending a process id, then default to
2445 what's in inferior_ptid, unless it's null at this point. If so,
2446 then since there's no way to know the pid of the reported
2447 threads, use the magic number. */
2448 if (ptid_equal (inferior_ptid
, null_ptid
))
2449 pid
= ptid_get_pid (magic_null_ptid
);
2451 pid
= ptid_get_pid (inferior_ptid
);
2455 return ptid_build (pid
, tid
, 0);
2461 if (ch
>= 'a' && ch
<= 'f')
2462 return ch
- 'a' + 10;
2463 if (ch
>= '0' && ch
<= '9')
2465 if (ch
>= 'A' && ch
<= 'F')
2466 return ch
- 'A' + 10;
2471 stub_unpack_int (char *buff
, int fieldlength
)
2478 nibble
= stubhex (*buff
++);
2482 retval
= retval
<< 4;
2488 unpack_nibble (char *buf
, int *val
)
2490 *val
= fromhex (*buf
++);
2495 unpack_byte (char *buf
, int *value
)
2497 *value
= stub_unpack_int (buf
, 2);
2502 pack_int (char *buf
, int value
)
2504 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2505 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2506 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2507 buf
= pack_hex_byte (buf
, (value
& 0xff));
2512 unpack_int (char *buf
, int *value
)
2514 *value
= stub_unpack_int (buf
, 8);
2518 #if 0 /* Currently unused, uncomment when needed. */
2519 static char *pack_string (char *pkt
, char *string
);
2522 pack_string (char *pkt
, char *string
)
2527 len
= strlen (string
);
2529 len
= 200; /* Bigger than most GDB packets, junk??? */
2530 pkt
= pack_hex_byte (pkt
, len
);
2534 if ((ch
== '\0') || (ch
== '#'))
2535 ch
= '*'; /* Protect encapsulation. */
2540 #endif /* 0 (unused) */
2543 unpack_string (char *src
, char *dest
, int length
)
2552 pack_threadid (char *pkt
, threadref
*id
)
2555 unsigned char *altid
;
2557 altid
= (unsigned char *) id
;
2558 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2560 pkt
= pack_hex_byte (pkt
, *altid
++);
2566 unpack_threadid (char *inbuf
, threadref
*id
)
2569 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2572 altref
= (char *) id
;
2574 while (inbuf
< limit
)
2576 x
= stubhex (*inbuf
++);
2577 y
= stubhex (*inbuf
++);
2578 *altref
++ = (x
<< 4) | y
;
2583 /* Externally, threadrefs are 64 bits but internally, they are still
2584 ints. This is due to a mismatch of specifications. We would like
2585 to use 64bit thread references internally. This is an adapter
2589 int_to_threadref (threadref
*id
, int value
)
2591 unsigned char *scan
;
2593 scan
= (unsigned char *) id
;
2599 *scan
++ = (value
>> 24) & 0xff;
2600 *scan
++ = (value
>> 16) & 0xff;
2601 *scan
++ = (value
>> 8) & 0xff;
2602 *scan
++ = (value
& 0xff);
2606 threadref_to_int (threadref
*ref
)
2609 unsigned char *scan
;
2615 value
= (value
<< 8) | ((*scan
++) & 0xff);
2620 copy_threadref (threadref
*dest
, threadref
*src
)
2623 unsigned char *csrc
, *cdest
;
2625 csrc
= (unsigned char *) src
;
2626 cdest
= (unsigned char *) dest
;
2633 threadmatch (threadref
*dest
, threadref
*src
)
2635 /* Things are broken right now, so just assume we got a match. */
2637 unsigned char *srcp
, *destp
;
2639 srcp
= (char *) src
;
2640 destp
= (char *) dest
;
2644 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2651 threadid:1, # always request threadid
2658 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2661 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2663 *pkt
++ = 'q'; /* Info Query */
2664 *pkt
++ = 'P'; /* process or thread info */
2665 pkt
= pack_int (pkt
, mode
); /* mode */
2666 pkt
= pack_threadid (pkt
, id
); /* threadid */
2667 *pkt
= '\0'; /* terminate */
2671 /* These values tag the fields in a thread info response packet. */
2672 /* Tagging the fields allows us to request specific fields and to
2673 add more fields as time goes by. */
2675 #define TAG_THREADID 1 /* Echo the thread identifier. */
2676 #define TAG_EXISTS 2 /* Is this process defined enough to
2677 fetch registers and its stack? */
2678 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2679 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2680 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2684 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2685 struct gdb_ext_thread_info
*info
)
2687 struct remote_state
*rs
= get_remote_state ();
2691 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2694 /* info->threadid = 0; FIXME: implement zero_threadref. */
2696 info
->display
[0] = '\0';
2697 info
->shortname
[0] = '\0';
2698 info
->more_display
[0] = '\0';
2700 /* Assume the characters indicating the packet type have been
2702 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2703 pkt
= unpack_threadid (pkt
, &ref
);
2706 warning (_("Incomplete response to threadinfo request."));
2707 if (!threadmatch (&ref
, expectedref
))
2708 { /* This is an answer to a different request. */
2709 warning (_("ERROR RMT Thread info mismatch."));
2712 copy_threadref (&info
->threadid
, &ref
);
2714 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2716 /* Packets are terminated with nulls. */
2717 while ((pkt
< limit
) && mask
&& *pkt
)
2719 pkt
= unpack_int (pkt
, &tag
); /* tag */
2720 pkt
= unpack_byte (pkt
, &length
); /* length */
2721 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2723 warning (_("ERROR RMT: threadinfo tag mismatch."));
2727 if (tag
== TAG_THREADID
)
2731 warning (_("ERROR RMT: length of threadid is not 16."));
2735 pkt
= unpack_threadid (pkt
, &ref
);
2736 mask
= mask
& ~TAG_THREADID
;
2739 if (tag
== TAG_EXISTS
)
2741 info
->active
= stub_unpack_int (pkt
, length
);
2743 mask
= mask
& ~(TAG_EXISTS
);
2746 warning (_("ERROR RMT: 'exists' length too long."));
2752 if (tag
== TAG_THREADNAME
)
2754 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2755 mask
= mask
& ~TAG_THREADNAME
;
2758 if (tag
== TAG_DISPLAY
)
2760 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2761 mask
= mask
& ~TAG_DISPLAY
;
2764 if (tag
== TAG_MOREDISPLAY
)
2766 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2767 mask
= mask
& ~TAG_MOREDISPLAY
;
2770 warning (_("ERROR RMT: unknown thread info tag."));
2771 break; /* Not a tag we know about. */
2777 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2778 struct gdb_ext_thread_info
*info
)
2780 struct remote_state
*rs
= get_remote_state ();
2783 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2785 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2787 if (rs
->buf
[0] == '\0')
2790 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2795 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2798 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2799 threadref
*nextthread
)
2801 *pkt
++ = 'q'; /* info query packet */
2802 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2803 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2804 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2805 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2810 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2813 parse_threadlist_response (char *pkt
, int result_limit
,
2814 threadref
*original_echo
, threadref
*resultlist
,
2817 struct remote_state
*rs
= get_remote_state ();
2819 int count
, resultcount
, done
;
2822 /* Assume the 'q' and 'M chars have been stripped. */
2823 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2824 /* done parse past here */
2825 pkt
= unpack_byte (pkt
, &count
); /* count field */
2826 pkt
= unpack_nibble (pkt
, &done
);
2827 /* The first threadid is the argument threadid. */
2828 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2829 while ((count
-- > 0) && (pkt
< limit
))
2831 pkt
= unpack_threadid (pkt
, resultlist
++);
2832 if (resultcount
++ >= result_limit
)
2840 /* Fetch the next batch of threads from the remote. Returns -1 if the
2841 qL packet is not supported, 0 on error and 1 on success. */
2844 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2845 int *done
, int *result_count
, threadref
*threadlist
)
2847 struct remote_state
*rs
= get_remote_state ();
2850 /* Trancate result limit to be smaller than the packet size. */
2851 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2852 >= get_remote_packet_size ())
2853 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2855 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2857 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2858 if (*rs
->buf
== '\0')
2860 /* Packet not supported. */
2865 parse_threadlist_response (rs
->buf
+ 2, result_limit
,
2866 &rs
->echo_nextthread
, threadlist
, done
);
2868 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
2870 /* FIXME: This is a good reason to drop the packet. */
2871 /* Possably, there is a duplicate response. */
2873 retransmit immediatly - race conditions
2874 retransmit after timeout - yes
2876 wait for packet, then exit
2878 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2879 return 0; /* I choose simply exiting. */
2881 if (*result_count
<= 0)
2885 warning (_("RMT ERROR : failed to get remote thread list."));
2888 return result
; /* break; */
2890 if (*result_count
> result_limit
)
2893 warning (_("RMT ERROR: threadlist response longer than requested."));
2899 /* Fetch the list of remote threads, with the qL packet, and call
2900 STEPFUNCTION for each thread found. Stops iterating and returns 1
2901 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2902 STEPFUNCTION returns false. If the packet is not supported,
2906 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2909 struct remote_state
*rs
= get_remote_state ();
2910 int done
, i
, result_count
;
2918 if (loopcount
++ > looplimit
)
2921 warning (_("Remote fetch threadlist -infinite loop-."));
2924 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
2925 MAXTHREADLISTRESULTS
,
2926 &done
, &result_count
,
2927 rs
->resultthreadlist
);
2930 /* Clear for later iterations. */
2932 /* Setup to resume next batch of thread references, set nextthread. */
2933 if (result_count
>= 1)
2934 copy_threadref (&rs
->nextthread
,
2935 &rs
->resultthreadlist
[result_count
- 1]);
2937 while (result_count
--)
2939 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
2949 /* A thread found on the remote target. */
2953 explicit thread_item (ptid_t ptid_
)
2957 thread_item (thread_item
&&other
) = default;
2958 thread_item
&operator= (thread_item
&&other
) = default;
2960 DISABLE_COPY_AND_ASSIGN (thread_item
);
2962 /* The thread's PTID. */
2965 /* The thread's extra info. */
2968 /* The thread's name. */
2971 /* The core the thread was running on. -1 if not known. */
2974 /* The thread handle associated with the thread. */
2975 gdb::byte_vector thread_handle
;
2978 /* Context passed around to the various methods listing remote
2979 threads. As new threads are found, they're added to the ITEMS
2982 struct threads_listing_context
2984 /* Return true if this object contains an entry for a thread with ptid
2987 bool contains_thread (ptid_t ptid
) const
2989 auto match_ptid
= [&] (const thread_item
&item
)
2991 return item
.ptid
== ptid
;
2994 auto it
= std::find_if (this->items
.begin (),
2998 return it
!= this->items
.end ();
3001 /* Remove the thread with ptid PTID. */
3003 void remove_thread (ptid_t ptid
)
3005 auto match_ptid
= [&] (const thread_item
&item
)
3007 return item
.ptid
== ptid
;
3010 auto it
= std::remove_if (this->items
.begin (),
3014 if (it
!= this->items
.end ())
3015 this->items
.erase (it
);
3018 /* The threads found on the remote target. */
3019 std::vector
<thread_item
> items
;
3023 remote_newthread_step (threadref
*ref
, void *data
)
3025 struct threads_listing_context
*context
3026 = (struct threads_listing_context
*) data
;
3027 int pid
= inferior_ptid
.pid ();
3028 int lwp
= threadref_to_int (ref
);
3029 ptid_t
ptid (pid
, lwp
);
3031 context
->items
.emplace_back (ptid
);
3033 return 1; /* continue iterator */
3036 #define CRAZY_MAX_THREADS 1000
3039 remote_current_thread (ptid_t oldpid
)
3041 struct remote_state
*rs
= get_remote_state ();
3044 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3045 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3050 result
= read_ptid (&rs
->buf
[2], &obuf
);
3051 if (*obuf
!= '\0' && remote_debug
)
3052 fprintf_unfiltered (gdb_stdlog
,
3053 "warning: garbage in qC reply\n");
3061 /* List remote threads using the deprecated qL packet. */
3064 remote_get_threads_with_ql (struct target_ops
*ops
,
3065 struct threads_listing_context
*context
)
3067 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3068 CRAZY_MAX_THREADS
) >= 0)
3074 #if defined(HAVE_LIBEXPAT)
3077 start_thread (struct gdb_xml_parser
*parser
,
3078 const struct gdb_xml_element
*element
,
3079 void *user_data
, VEC(gdb_xml_value_s
) *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
;
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
;
3095 attr
= xml_find_attribute (attributes
, "name");
3097 item
.name
= (const char *) attr
->value
;
3099 attr
= xml_find_attribute (attributes
, "handle");
3101 item
.thread_handle
= hex2bin ((const char *) attr
->value
);
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::unique_xmalloc_ptr
<char> xml
3153 = target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3155 if (xml
!= NULL
&& *xml
!= '\0')
3157 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3158 threads_elements
, xml
.get (), 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
)
3324 return get_remote_thread_info (info
)->extra
.c_str ();
3329 if (rs
->use_threadextra_query
)
3332 char *endb
= rs
->buf
+ get_remote_packet_size ();
3334 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3336 write_ptid (b
, endb
, tp
->ptid
);
3339 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3340 if (rs
->buf
[0] != 0)
3342 n
= std::min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
3343 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
3344 display_buf
[result
] = '\0';
3349 /* If the above query fails, fall back to the old method. */
3350 rs
->use_threadextra_query
= 0;
3351 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3352 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3353 int_to_threadref (&id
, ptid_get_lwp (tp
->ptid
));
3354 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3355 if (threadinfo
.active
)
3357 if (*threadinfo
.shortname
)
3358 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
3359 " Name: %s,", threadinfo
.shortname
);
3360 if (*threadinfo
.display
)
3361 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3362 " State: %s,", threadinfo
.display
);
3363 if (*threadinfo
.more_display
)
3364 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3365 " Priority: %s", threadinfo
.more_display
);
3369 /* For purely cosmetic reasons, clear up trailing commas. */
3370 if (',' == display_buf
[n
-1])
3371 display_buf
[n
-1] = ' ';
3380 remote_static_tracepoint_marker_at (struct target_ops
*self
, CORE_ADDR addr
,
3381 struct static_tracepoint_marker
*marker
)
3383 struct remote_state
*rs
= get_remote_state ();
3386 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3388 p
+= hexnumstr (p
, addr
);
3390 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3394 error (_("Remote failure reply: %s"), p
);
3398 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
3405 static VEC(static_tracepoint_marker_p
) *
3406 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3409 struct remote_state
*rs
= get_remote_state ();
3410 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
3411 struct static_tracepoint_marker
*marker
= NULL
;
3412 struct cleanup
*old_chain
;
3415 /* Ask for a first packet of static tracepoint marker
3418 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3421 error (_("Remote failure reply: %s"), p
);
3423 old_chain
= make_cleanup (free_current_marker
, &marker
);
3428 marker
= XCNEW (struct static_tracepoint_marker
);
3432 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3434 if (strid
== NULL
|| strcmp (strid
, marker
->str_id
) == 0)
3436 VEC_safe_push (static_tracepoint_marker_p
,
3442 release_static_tracepoint_marker (marker
);
3443 memset (marker
, 0, sizeof (*marker
));
3446 while (*p
++ == ','); /* comma-separated list */
3447 /* Ask for another packet of static tracepoint definition. */
3449 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3453 do_cleanups (old_chain
);
3458 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3461 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3463 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3467 /* Restart the remote side; this is an extended protocol operation. */
3470 extended_remote_restart (void)
3472 struct remote_state
*rs
= get_remote_state ();
3474 /* Send the restart command; for reasons I don't understand the
3475 remote side really expects a number after the "R". */
3476 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3479 remote_fileio_reset ();
3482 /* Clean up connection to a remote debugger. */
3485 remote_close (struct target_ops
*self
)
3487 struct remote_state
*rs
= get_remote_state ();
3489 if (rs
->remote_desc
== NULL
)
3490 return; /* already closed */
3492 /* Make sure we leave stdin registered in the event loop. */
3493 remote_terminal_ours (self
);
3495 serial_close (rs
->remote_desc
);
3496 rs
->remote_desc
= NULL
;
3498 /* We don't have a connection to the remote stub anymore. Get rid
3499 of all the inferiors and their threads we were controlling.
3500 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3501 will be unable to find the thread corresponding to (pid, 0, 0). */
3502 inferior_ptid
= null_ptid
;
3503 discard_all_inferiors ();
3505 /* We are closing the remote target, so we should discard
3506 everything of this target. */
3507 discard_pending_stop_replies_in_queue (rs
);
3509 if (remote_async_inferior_event_token
)
3510 delete_async_event_handler (&remote_async_inferior_event_token
);
3512 remote_notif_state_xfree (rs
->notif_state
);
3514 trace_reset_local_state ();
3517 /* Query the remote side for the text, data and bss offsets. */
3522 struct remote_state
*rs
= get_remote_state ();
3525 int lose
, num_segments
= 0, do_sections
, do_segments
;
3526 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3527 struct section_offsets
*offs
;
3528 struct symfile_segment_data
*data
;
3530 if (symfile_objfile
== NULL
)
3533 putpkt ("qOffsets");
3534 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3537 if (buf
[0] == '\000')
3538 return; /* Return silently. Stub doesn't support
3542 warning (_("Remote failure reply: %s"), buf
);
3546 /* Pick up each field in turn. This used to be done with scanf, but
3547 scanf will make trouble if CORE_ADDR size doesn't match
3548 conversion directives correctly. The following code will work
3549 with any size of CORE_ADDR. */
3550 text_addr
= data_addr
= bss_addr
= 0;
3554 if (startswith (ptr
, "Text="))
3557 /* Don't use strtol, could lose on big values. */
3558 while (*ptr
&& *ptr
!= ';')
3559 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3561 if (startswith (ptr
, ";Data="))
3564 while (*ptr
&& *ptr
!= ';')
3565 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3570 if (!lose
&& startswith (ptr
, ";Bss="))
3573 while (*ptr
&& *ptr
!= ';')
3574 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3576 if (bss_addr
!= data_addr
)
3577 warning (_("Target reported unsupported offsets: %s"), buf
);
3582 else if (startswith (ptr
, "TextSeg="))
3585 /* Don't use strtol, could lose on big values. */
3586 while (*ptr
&& *ptr
!= ';')
3587 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3590 if (startswith (ptr
, ";DataSeg="))
3593 while (*ptr
&& *ptr
!= ';')
3594 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3602 error (_("Malformed response to offset query, %s"), buf
);
3603 else if (*ptr
!= '\0')
3604 warning (_("Target reported unsupported offsets: %s"), buf
);
3606 offs
= ((struct section_offsets
*)
3607 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3608 memcpy (offs
, symfile_objfile
->section_offsets
,
3609 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3611 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3612 do_segments
= (data
!= NULL
);
3613 do_sections
= num_segments
== 0;
3615 if (num_segments
> 0)
3617 segments
[0] = text_addr
;
3618 segments
[1] = data_addr
;
3620 /* If we have two segments, we can still try to relocate everything
3621 by assuming that the .text and .data offsets apply to the whole
3622 text and data segments. Convert the offsets given in the packet
3623 to base addresses for symfile_map_offsets_to_segments. */
3624 else if (data
&& data
->num_segments
== 2)
3626 segments
[0] = data
->segment_bases
[0] + text_addr
;
3627 segments
[1] = data
->segment_bases
[1] + data_addr
;
3630 /* If the object file has only one segment, assume that it is text
3631 rather than data; main programs with no writable data are rare,
3632 but programs with no code are useless. Of course the code might
3633 have ended up in the data segment... to detect that we would need
3634 the permissions here. */
3635 else if (data
&& data
->num_segments
== 1)
3637 segments
[0] = data
->segment_bases
[0] + text_addr
;
3640 /* There's no way to relocate by segment. */
3646 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3647 offs
, num_segments
, segments
);
3649 if (ret
== 0 && !do_sections
)
3650 error (_("Can not handle qOffsets TextSeg "
3651 "response with this symbol file"));
3658 free_symfile_segment_data (data
);
3662 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3664 /* This is a temporary kludge to force data and bss to use the
3665 same offsets because that's what nlmconv does now. The real
3666 solution requires changes to the stub and remote.c that I
3667 don't have time to do right now. */
3669 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3670 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3673 objfile_relocate (symfile_objfile
, offs
);
3676 /* Send interrupt_sequence to remote target. */
3678 send_interrupt_sequence (void)
3680 struct remote_state
*rs
= get_remote_state ();
3682 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3683 remote_serial_write ("\x03", 1);
3684 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3685 serial_send_break (rs
->remote_desc
);
3686 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3688 serial_send_break (rs
->remote_desc
);
3689 remote_serial_write ("g", 1);
3692 internal_error (__FILE__
, __LINE__
,
3693 _("Invalid value for interrupt_sequence_mode: %s."),
3694 interrupt_sequence_mode
);
3698 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3699 and extract the PTID. Returns NULL_PTID if not found. */
3702 stop_reply_extract_thread (char *stop_reply
)
3704 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3708 /* Txx r:val ; r:val (...) */
3711 /* Look for "register" named "thread". */
3716 p1
= strchr (p
, ':');
3720 if (strncmp (p
, "thread", p1
- p
) == 0)
3721 return read_ptid (++p1
, &p
);
3723 p1
= strchr (p
, ';');
3735 /* Determine the remote side's current thread. If we have a stop
3736 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3737 "thread" register we can extract the current thread from. If not,
3738 ask the remote which is the current thread with qC. The former
3739 method avoids a roundtrip. */
3742 get_current_thread (char *wait_status
)
3744 ptid_t ptid
= null_ptid
;
3746 /* Note we don't use remote_parse_stop_reply as that makes use of
3747 the target architecture, which we haven't yet fully determined at
3749 if (wait_status
!= NULL
)
3750 ptid
= stop_reply_extract_thread (wait_status
);
3751 if (ptid_equal (ptid
, null_ptid
))
3752 ptid
= remote_current_thread (inferior_ptid
);
3757 /* Query the remote target for which is the current thread/process,
3758 add it to our tables, and update INFERIOR_PTID. The caller is
3759 responsible for setting the state such that the remote end is ready
3760 to return the current thread.
3762 This function is called after handling the '?' or 'vRun' packets,
3763 whose response is a stop reply from which we can also try
3764 extracting the thread. If the target doesn't support the explicit
3765 qC query, we infer the current thread from that stop reply, passed
3766 in in WAIT_STATUS, which may be NULL. */
3769 add_current_inferior_and_thread (char *wait_status
)
3771 struct remote_state
*rs
= get_remote_state ();
3774 inferior_ptid
= null_ptid
;
3776 /* Now, if we have thread information, update inferior_ptid. */
3777 ptid_t curr_ptid
= get_current_thread (wait_status
);
3779 if (curr_ptid
!= null_ptid
)
3781 if (!remote_multi_process_p (rs
))
3786 /* Without this, some commands which require an active target
3787 (such as kill) won't work. This variable serves (at least)
3788 double duty as both the pid of the target process (if it has
3789 such), and as a flag indicating that a target is active. */
3790 curr_ptid
= magic_null_ptid
;
3794 remote_add_inferior (fake_pid_p
, ptid_get_pid (curr_ptid
), -1, 1);
3796 /* Add the main thread and switch to it. Don't try reading
3797 registers yet, since we haven't fetched the target description
3799 thread_info
*tp
= add_thread_silent (curr_ptid
);
3800 switch_to_thread_no_regs (tp
);
3803 /* Print info about a thread that was found already stopped on
3807 print_one_stopped_thread (struct thread_info
*thread
)
3809 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
3811 switch_to_thread (thread
->ptid
);
3812 stop_pc
= get_frame_pc (get_current_frame ());
3813 set_current_sal_from_frame (get_current_frame ());
3815 thread
->suspend
.waitstatus_pending_p
= 0;
3817 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
3819 enum gdb_signal sig
= ws
->value
.sig
;
3821 if (signal_print_state (sig
))
3822 observer_notify_signal_received (sig
);
3824 observer_notify_normal_stop (NULL
, 1);
3827 /* Process all initial stop replies the remote side sent in response
3828 to the ? packet. These indicate threads that were already stopped
3829 on initial connection. We mark these threads as stopped and print
3830 their current frame before giving the user the prompt. */
3833 process_initial_stop_replies (int from_tty
)
3835 int pending_stop_replies
= stop_reply_queue_length ();
3836 struct inferior
*inf
;
3837 struct thread_info
*thread
;
3838 struct thread_info
*selected
= NULL
;
3839 struct thread_info
*lowest_stopped
= NULL
;
3840 struct thread_info
*first
= NULL
;
3842 /* Consume the initial pending events. */
3843 while (pending_stop_replies
-- > 0)
3845 ptid_t waiton_ptid
= minus_one_ptid
;
3847 struct target_waitstatus ws
;
3848 int ignore_event
= 0;
3849 struct thread_info
*thread
;
3851 memset (&ws
, 0, sizeof (ws
));
3852 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3854 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3858 case TARGET_WAITKIND_IGNORE
:
3859 case TARGET_WAITKIND_NO_RESUMED
:
3860 case TARGET_WAITKIND_SIGNALLED
:
3861 case TARGET_WAITKIND_EXITED
:
3862 /* We shouldn't see these, but if we do, just ignore. */
3864 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3868 case TARGET_WAITKIND_EXECD
:
3869 xfree (ws
.value
.execd_pathname
);
3878 thread
= find_thread_ptid (event_ptid
);
3880 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3882 enum gdb_signal sig
= ws
.value
.sig
;
3884 /* Stubs traditionally report SIGTRAP as initial signal,
3885 instead of signal 0. Suppress it. */
3886 if (sig
== GDB_SIGNAL_TRAP
)
3888 thread
->suspend
.stop_signal
= sig
;
3892 thread
->suspend
.waitstatus
= ws
;
3894 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
3895 || ws
.value
.sig
!= GDB_SIGNAL_0
)
3896 thread
->suspend
.waitstatus_pending_p
= 1;
3898 set_executing (event_ptid
, 0);
3899 set_running (event_ptid
, 0);
3900 get_remote_thread_info (thread
)->vcont_resumed
= 0;
3903 /* "Notice" the new inferiors before anything related to
3904 registers/memory. */
3910 inf
->needs_setup
= 1;
3914 thread
= any_live_thread_of_process (inf
->pid
);
3915 notice_new_inferior (thread
->ptid
,
3916 thread
->state
== THREAD_RUNNING
,
3921 /* If all-stop on top of non-stop, pause all threads. Note this
3922 records the threads' stop pc, so must be done after "noticing"
3926 stop_all_threads ();
3928 /* If all threads of an inferior were already stopped, we
3929 haven't setup the inferior yet. */
3935 if (inf
->needs_setup
)
3937 thread
= any_live_thread_of_process (inf
->pid
);
3938 switch_to_thread_no_regs (thread
);
3944 /* Now go over all threads that are stopped, and print their current
3945 frame. If all-stop, then if there's a signalled thread, pick
3947 ALL_NON_EXITED_THREADS (thread
)
3953 set_running (thread
->ptid
, 0);
3954 else if (thread
->state
!= THREAD_STOPPED
)
3957 if (selected
== NULL
3958 && thread
->suspend
.waitstatus_pending_p
)
3961 if (lowest_stopped
== NULL
3962 || thread
->inf
->num
< lowest_stopped
->inf
->num
3963 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
3964 lowest_stopped
= thread
;
3967 print_one_stopped_thread (thread
);
3970 /* In all-stop, we only print the status of one thread, and leave
3971 others with their status pending. */
3976 thread
= lowest_stopped
;
3980 print_one_stopped_thread (thread
);
3983 /* For "info program". */
3984 thread
= inferior_thread ();
3985 if (thread
->state
== THREAD_STOPPED
)
3986 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
3989 /* Start the remote connection and sync state. */
3992 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
3994 struct remote_state
*rs
= get_remote_state ();
3995 struct packet_config
*noack_config
;
3996 char *wait_status
= NULL
;
3998 /* Signal other parts that we're going through the initial setup,
3999 and so things may not be stable yet. E.g., we don't try to
4000 install tracepoints until we've relocated symbols. Also, a
4001 Ctrl-C before we're connected and synced up can't interrupt the
4002 target. Instead, it offers to drop the (potentially wedged)
4004 rs
->starting_up
= 1;
4008 if (interrupt_on_connect
)
4009 send_interrupt_sequence ();
4011 /* Ack any packet which the remote side has already sent. */
4012 remote_serial_write ("+", 1);
4014 /* The first packet we send to the target is the optional "supported
4015 packets" request. If the target can answer this, it will tell us
4016 which later probes to skip. */
4017 remote_query_supported ();
4019 /* If the stub wants to get a QAllow, compose one and send it. */
4020 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4021 remote_set_permissions (target
);
4023 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4024 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4025 as a reply to known packet. For packet "vFile:setfs:" it is an
4026 invalid reply and GDB would return error in
4027 remote_hostio_set_filesystem, making remote files access impossible.
4028 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4029 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4031 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4033 putpkt (v_mustreplyempty
);
4034 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4035 if (strcmp (rs
->buf
, "OK") == 0)
4036 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4037 else if (strcmp (rs
->buf
, "") != 0)
4038 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4042 /* Next, we possibly activate noack mode.
4044 If the QStartNoAckMode packet configuration is set to AUTO,
4045 enable noack mode if the stub reported a wish for it with
4048 If set to TRUE, then enable noack mode even if the stub didn't
4049 report it in qSupported. If the stub doesn't reply OK, the
4050 session ends with an error.
4052 If FALSE, then don't activate noack mode, regardless of what the
4053 stub claimed should be the default with qSupported. */
4055 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4056 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4058 putpkt ("QStartNoAckMode");
4059 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4060 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4066 /* Tell the remote that we are using the extended protocol. */
4068 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4071 /* Let the target know which signals it is allowed to pass down to
4073 update_signals_program_target ();
4075 /* Next, if the target can specify a description, read it. We do
4076 this before anything involving memory or registers. */
4077 target_find_description ();
4079 /* Next, now that we know something about the target, update the
4080 address spaces in the program spaces. */
4081 update_address_spaces ();
4083 /* On OSs where the list of libraries is global to all
4084 processes, we fetch them early. */
4085 if (gdbarch_has_global_solist (target_gdbarch ()))
4086 solib_add (NULL
, from_tty
, auto_solib_add
);
4088 if (target_is_non_stop_p ())
4090 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4091 error (_("Non-stop mode requested, but remote "
4092 "does not support non-stop"));
4094 putpkt ("QNonStop:1");
4095 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4097 if (strcmp (rs
->buf
, "OK") != 0)
4098 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4100 /* Find about threads and processes the stub is already
4101 controlling. We default to adding them in the running state.
4102 The '?' query below will then tell us about which threads are
4104 remote_update_thread_list (target
);
4106 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4108 /* Don't assume that the stub can operate in all-stop mode.
4109 Request it explicitly. */
4110 putpkt ("QNonStop:0");
4111 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4113 if (strcmp (rs
->buf
, "OK") != 0)
4114 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4117 /* Upload TSVs regardless of whether the target is running or not. The
4118 remote stub, such as GDBserver, may have some predefined or builtin
4119 TSVs, even if the target is not running. */
4120 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4122 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4124 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
4125 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4128 /* Check whether the target is running now. */
4130 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4132 if (!target_is_non_stop_p ())
4134 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4137 error (_("The target is not running (try extended-remote?)"));
4139 /* We're connected, but not running. Drop out before we
4140 call start_remote. */
4141 rs
->starting_up
= 0;
4146 /* Save the reply for later. */
4147 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4148 strcpy (wait_status
, rs
->buf
);
4151 /* Fetch thread list. */
4152 target_update_thread_list ();
4154 /* Let the stub know that we want it to return the thread. */
4155 set_continue_thread (minus_one_ptid
);
4157 if (thread_count () == 0)
4159 /* Target has no concept of threads at all. GDB treats
4160 non-threaded target as single-threaded; add a main
4162 add_current_inferior_and_thread (wait_status
);
4166 /* We have thread information; select the thread the target
4167 says should be current. If we're reconnecting to a
4168 multi-threaded program, this will ideally be the thread
4169 that last reported an event before GDB disconnected. */
4170 inferior_ptid
= get_current_thread (wait_status
);
4171 if (ptid_equal (inferior_ptid
, null_ptid
))
4173 /* Odd... The target was able to list threads, but not
4174 tell us which thread was current (no "thread"
4175 register in T stop reply?). Just pick the first
4176 thread in the thread list then. */
4179 fprintf_unfiltered (gdb_stdlog
,
4180 "warning: couldn't determine remote "
4181 "current thread; picking first in list.\n");
4183 inferior_ptid
= thread_list
->ptid
;
4187 /* init_wait_for_inferior should be called before get_offsets in order
4188 to manage `inserted' flag in bp loc in a correct state.
4189 breakpoint_init_inferior, called from init_wait_for_inferior, set
4190 `inserted' flag to 0, while before breakpoint_re_set, called from
4191 start_remote, set `inserted' flag to 1. In the initialization of
4192 inferior, breakpoint_init_inferior should be called first, and then
4193 breakpoint_re_set can be called. If this order is broken, state of
4194 `inserted' flag is wrong, and cause some problems on breakpoint
4196 init_wait_for_inferior ();
4198 get_offsets (); /* Get text, data & bss offsets. */
4200 /* If we could not find a description using qXfer, and we know
4201 how to do it some other way, try again. This is not
4202 supported for non-stop; it could be, but it is tricky if
4203 there are no stopped threads when we connect. */
4204 if (remote_read_description_p (target
)
4205 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4207 target_clear_description ();
4208 target_find_description ();
4211 /* Use the previously fetched status. */
4212 gdb_assert (wait_status
!= NULL
);
4213 strcpy (rs
->buf
, wait_status
);
4214 rs
->cached_wait_status
= 1;
4216 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4220 /* Clear WFI global state. Do this before finding about new
4221 threads and inferiors, and setting the current inferior.
4222 Otherwise we would clear the proceed status of the current
4223 inferior when we want its stop_soon state to be preserved
4224 (see notice_new_inferior). */
4225 init_wait_for_inferior ();
4227 /* In non-stop, we will either get an "OK", meaning that there
4228 are no stopped threads at this time; or, a regular stop
4229 reply. In the latter case, there may be more than one thread
4230 stopped --- we pull them all out using the vStopped
4232 if (strcmp (rs
->buf
, "OK") != 0)
4234 struct notif_client
*notif
= ¬if_client_stop
;
4236 /* remote_notif_get_pending_replies acks this one, and gets
4238 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4239 = remote_notif_parse (notif
, rs
->buf
);
4240 remote_notif_get_pending_events (notif
);
4243 if (thread_count () == 0)
4246 error (_("The target is not running (try extended-remote?)"));
4248 /* We're connected, but not running. Drop out before we
4249 call start_remote. */
4250 rs
->starting_up
= 0;
4254 /* In non-stop mode, any cached wait status will be stored in
4255 the stop reply queue. */
4256 gdb_assert (wait_status
== NULL
);
4258 /* Report all signals during attach/startup. */
4259 remote_pass_signals (target
, 0, NULL
);
4261 /* If there are already stopped threads, mark them stopped and
4262 report their stops before giving the prompt to the user. */
4263 process_initial_stop_replies (from_tty
);
4265 if (target_can_async_p ())
4269 /* If we connected to a live target, do some additional setup. */
4270 if (target_has_execution
)
4272 if (symfile_objfile
) /* No use without a symbol-file. */
4273 remote_check_symbols ();
4276 /* Possibly the target has been engaged in a trace run started
4277 previously; find out where things are at. */
4278 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4280 struct uploaded_tp
*uploaded_tps
= NULL
;
4282 if (current_trace_status ()->running
)
4283 printf_filtered (_("Trace is already running on the target.\n"));
4285 remote_upload_tracepoints (target
, &uploaded_tps
);
4287 merge_uploaded_tracepoints (&uploaded_tps
);
4290 /* Possibly the target has been engaged in a btrace record started
4291 previously; find out where things are at. */
4292 remote_btrace_maybe_reopen ();
4294 /* The thread and inferior lists are now synchronized with the
4295 target, our symbols have been relocated, and we're merged the
4296 target's tracepoints with ours. We're done with basic start
4298 rs
->starting_up
= 0;
4300 /* Maybe breakpoints are global and need to be inserted now. */
4301 if (breakpoints_should_be_inserted_now ())
4302 insert_breakpoints ();
4305 /* Open a connection to a remote debugger.
4306 NAME is the filename used for communication. */
4309 remote_open (const char *name
, int from_tty
)
4311 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4314 /* Open a connection to a remote debugger using the extended
4315 remote gdb protocol. NAME is the filename used for communication. */
4318 extended_remote_open (const char *name
, int from_tty
)
4320 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4323 /* Reset all packets back to "unknown support". Called when opening a
4324 new connection to a remote target. */
4327 reset_all_packet_configs_support (void)
4331 for (i
= 0; i
< PACKET_MAX
; i
++)
4332 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4335 /* Initialize all packet configs. */
4338 init_all_packet_configs (void)
4342 for (i
= 0; i
< PACKET_MAX
; i
++)
4344 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4345 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4349 /* Symbol look-up. */
4352 remote_check_symbols (void)
4354 char *msg
, *reply
, *tmp
;
4357 struct cleanup
*old_chain
;
4359 /* The remote side has no concept of inferiors that aren't running
4360 yet, it only knows about running processes. If we're connected
4361 but our current inferior is not running, we should not invite the
4362 remote target to request symbol lookups related to its
4363 (unrelated) current process. */
4364 if (!target_has_execution
)
4367 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4370 /* Make sure the remote is pointing at the right process. Note
4371 there's no way to select "no process". */
4372 set_general_process ();
4374 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4375 because we need both at the same time. */
4376 msg
= (char *) xmalloc (get_remote_packet_size ());
4377 old_chain
= make_cleanup (xfree
, msg
);
4378 reply
= (char *) xmalloc (get_remote_packet_size ());
4379 make_cleanup (free_current_contents
, &reply
);
4380 reply_size
= get_remote_packet_size ();
4382 /* Invite target to request symbol lookups. */
4384 putpkt ("qSymbol::");
4385 getpkt (&reply
, &reply_size
, 0);
4386 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4388 while (startswith (reply
, "qSymbol:"))
4390 struct bound_minimal_symbol sym
;
4393 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4395 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4396 if (sym
.minsym
== NULL
)
4397 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4400 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4401 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4403 /* If this is a function address, return the start of code
4404 instead of any data function descriptor. */
4405 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4409 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4410 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4414 getpkt (&reply
, &reply_size
, 0);
4417 do_cleanups (old_chain
);
4420 static struct serial
*
4421 remote_serial_open (const char *name
)
4423 static int udp_warning
= 0;
4425 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4426 of in ser-tcp.c, because it is the remote protocol assuming that the
4427 serial connection is reliable and not the serial connection promising
4429 if (!udp_warning
&& startswith (name
, "udp:"))
4431 warning (_("The remote protocol may be unreliable over UDP.\n"
4432 "Some events may be lost, rendering further debugging "
4437 return serial_open (name
);
4440 /* Inform the target of our permission settings. The permission flags
4441 work without this, but if the target knows the settings, it can do
4442 a couple things. First, it can add its own check, to catch cases
4443 that somehow manage to get by the permissions checks in target
4444 methods. Second, if the target is wired to disallow particular
4445 settings (for instance, a system in the field that is not set up to
4446 be able to stop at a breakpoint), it can object to any unavailable
4450 remote_set_permissions (struct target_ops
*self
)
4452 struct remote_state
*rs
= get_remote_state ();
4454 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4455 "WriteReg:%x;WriteMem:%x;"
4456 "InsertBreak:%x;InsertTrace:%x;"
4457 "InsertFastTrace:%x;Stop:%x",
4458 may_write_registers
, may_write_memory
,
4459 may_insert_breakpoints
, may_insert_tracepoints
,
4460 may_insert_fast_tracepoints
, may_stop
);
4462 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4464 /* If the target didn't like the packet, warn the user. Do not try
4465 to undo the user's settings, that would just be maddening. */
4466 if (strcmp (rs
->buf
, "OK") != 0)
4467 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4470 /* This type describes each known response to the qSupported
4472 struct protocol_feature
4474 /* The name of this protocol feature. */
4477 /* The default for this protocol feature. */
4478 enum packet_support default_support
;
4480 /* The function to call when this feature is reported, or after
4481 qSupported processing if the feature is not supported.
4482 The first argument points to this structure. The second
4483 argument indicates whether the packet requested support be
4484 enabled, disabled, or probed (or the default, if this function
4485 is being called at the end of processing and this feature was
4486 not reported). The third argument may be NULL; if not NULL, it
4487 is a NUL-terminated string taken from the packet following
4488 this feature's name and an equals sign. */
4489 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4492 /* The corresponding packet for this feature. Only used if
4493 FUNC is remote_supported_packet. */
4498 remote_supported_packet (const struct protocol_feature
*feature
,
4499 enum packet_support support
,
4500 const char *argument
)
4504 warning (_("Remote qSupported response supplied an unexpected value for"
4505 " \"%s\"."), feature
->name
);
4509 remote_protocol_packets
[feature
->packet
].support
= support
;
4513 remote_packet_size (const struct protocol_feature
*feature
,
4514 enum packet_support support
, const char *value
)
4516 struct remote_state
*rs
= get_remote_state ();
4521 if (support
!= PACKET_ENABLE
)
4524 if (value
== NULL
|| *value
== '\0')
4526 warning (_("Remote target reported \"%s\" without a size."),
4532 packet_size
= strtol (value
, &value_end
, 16);
4533 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4535 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4536 feature
->name
, value
);
4540 /* Record the new maximum packet size. */
4541 rs
->explicit_packet_size
= packet_size
;
4544 static const struct protocol_feature remote_protocol_features
[] = {
4545 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4546 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4547 PACKET_qXfer_auxv
},
4548 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4549 PACKET_qXfer_exec_file
},
4550 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4551 PACKET_qXfer_features
},
4552 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4553 PACKET_qXfer_libraries
},
4554 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4555 PACKET_qXfer_libraries_svr4
},
4556 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4557 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4558 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4559 PACKET_qXfer_memory_map
},
4560 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4561 PACKET_qXfer_spu_read
},
4562 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4563 PACKET_qXfer_spu_write
},
4564 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4565 PACKET_qXfer_osdata
},
4566 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4567 PACKET_qXfer_threads
},
4568 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4569 PACKET_qXfer_traceframe_info
},
4570 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4571 PACKET_QPassSignals
},
4572 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
4573 PACKET_QCatchSyscalls
},
4574 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4575 PACKET_QProgramSignals
},
4576 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
4577 PACKET_QSetWorkingDir
},
4578 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
4579 PACKET_QStartupWithShell
},
4580 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
4581 PACKET_QEnvironmentHexEncoded
},
4582 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
4583 PACKET_QEnvironmentReset
},
4584 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
4585 PACKET_QEnvironmentUnset
},
4586 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4587 PACKET_QStartNoAckMode
},
4588 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4589 PACKET_multiprocess_feature
},
4590 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4591 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4592 PACKET_qXfer_siginfo_read
},
4593 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4594 PACKET_qXfer_siginfo_write
},
4595 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4596 PACKET_ConditionalTracepoints
},
4597 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4598 PACKET_ConditionalBreakpoints
},
4599 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4600 PACKET_BreakpointCommands
},
4601 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4602 PACKET_FastTracepoints
},
4603 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4604 PACKET_StaticTracepoints
},
4605 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4606 PACKET_InstallInTrace
},
4607 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4608 PACKET_DisconnectedTracing_feature
},
4609 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4611 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4613 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4614 PACKET_TracepointSource
},
4615 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4617 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4618 PACKET_EnableDisableTracepoints_feature
},
4619 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4620 PACKET_qXfer_fdpic
},
4621 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4623 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4624 PACKET_QDisableRandomization
},
4625 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4626 { "QTBuffer:size", PACKET_DISABLE
,
4627 remote_supported_packet
, PACKET_QTBuffer_size
},
4628 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4629 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4630 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4631 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4632 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4633 PACKET_qXfer_btrace
},
4634 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4635 PACKET_qXfer_btrace_conf
},
4636 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4637 PACKET_Qbtrace_conf_bts_size
},
4638 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4639 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4640 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4641 PACKET_fork_event_feature
},
4642 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4643 PACKET_vfork_event_feature
},
4644 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4645 PACKET_exec_event_feature
},
4646 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4647 PACKET_Qbtrace_conf_pt_size
},
4648 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
4649 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
4650 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
4653 static char *remote_support_xml
;
4655 /* Register string appended to "xmlRegisters=" in qSupported query. */
4658 register_remote_support_xml (const char *xml
)
4660 #if defined(HAVE_LIBEXPAT)
4661 if (remote_support_xml
== NULL
)
4662 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4665 char *copy
= xstrdup (remote_support_xml
+ 13);
4666 char *p
= strtok (copy
, ",");
4670 if (strcmp (p
, xml
) == 0)
4677 while ((p
= strtok (NULL
, ",")) != NULL
);
4680 remote_support_xml
= reconcat (remote_support_xml
,
4681 remote_support_xml
, ",", xml
,
4688 remote_query_supported_append (char *msg
, const char *append
)
4691 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4693 return xstrdup (append
);
4697 remote_query_supported (void)
4699 struct remote_state
*rs
= get_remote_state ();
4702 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4704 /* The packet support flags are handled differently for this packet
4705 than for most others. We treat an error, a disabled packet, and
4706 an empty response identically: any features which must be reported
4707 to be used will be automatically disabled. An empty buffer
4708 accomplishes this, since that is also the representation for a list
4709 containing no features. */
4712 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4715 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4717 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4718 q
= remote_query_supported_append (q
, "multiprocess+");
4720 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4721 q
= remote_query_supported_append (q
, "swbreak+");
4722 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4723 q
= remote_query_supported_append (q
, "hwbreak+");
4725 q
= remote_query_supported_append (q
, "qRelocInsn+");
4727 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4728 != AUTO_BOOLEAN_FALSE
)
4729 q
= remote_query_supported_append (q
, "fork-events+");
4730 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4731 != AUTO_BOOLEAN_FALSE
)
4732 q
= remote_query_supported_append (q
, "vfork-events+");
4733 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4734 != AUTO_BOOLEAN_FALSE
)
4735 q
= remote_query_supported_append (q
, "exec-events+");
4737 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4738 q
= remote_query_supported_append (q
, "vContSupported+");
4740 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
4741 q
= remote_query_supported_append (q
, "QThreadEvents+");
4743 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
4744 q
= remote_query_supported_append (q
, "no-resumed+");
4746 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4747 the qSupported:xmlRegisters=i386 handling. */
4748 if (remote_support_xml
!= NULL
)
4749 q
= remote_query_supported_append (q
, remote_support_xml
);
4751 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4754 do_cleanups (old_chain
);
4756 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4758 /* If an error occured, warn, but do not return - just reset the
4759 buffer to empty and go on to disable features. */
4760 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4763 warning (_("Remote failure reply: %s"), rs
->buf
);
4768 memset (seen
, 0, sizeof (seen
));
4773 enum packet_support is_supported
;
4774 char *p
, *end
, *name_end
, *value
;
4776 /* First separate out this item from the rest of the packet. If
4777 there's another item after this, we overwrite the separator
4778 (terminated strings are much easier to work with). */
4780 end
= strchr (p
, ';');
4783 end
= p
+ strlen (p
);
4793 warning (_("empty item in \"qSupported\" response"));
4798 name_end
= strchr (p
, '=');
4801 /* This is a name=value entry. */
4802 is_supported
= PACKET_ENABLE
;
4803 value
= name_end
+ 1;
4812 is_supported
= PACKET_ENABLE
;
4816 is_supported
= PACKET_DISABLE
;
4820 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4824 warning (_("unrecognized item \"%s\" "
4825 "in \"qSupported\" response"), p
);
4831 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4832 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4834 const struct protocol_feature
*feature
;
4837 feature
= &remote_protocol_features
[i
];
4838 feature
->func (feature
, is_supported
, value
);
4843 /* If we increased the packet size, make sure to increase the global
4844 buffer size also. We delay this until after parsing the entire
4845 qSupported packet, because this is the same buffer we were
4847 if (rs
->buf_size
< rs
->explicit_packet_size
)
4849 rs
->buf_size
= rs
->explicit_packet_size
;
4850 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4853 /* Handle the defaults for unmentioned features. */
4854 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4857 const struct protocol_feature
*feature
;
4859 feature
= &remote_protocol_features
[i
];
4860 feature
->func (feature
, feature
->default_support
, NULL
);
4864 /* Serial QUIT handler for the remote serial descriptor.
4866 Defers handling a Ctrl-C until we're done with the current
4867 command/response packet sequence, unless:
4869 - We're setting up the connection. Don't send a remote interrupt
4870 request, as we're not fully synced yet. Quit immediately
4873 - The target has been resumed in the foreground
4874 (target_terminal::is_ours is false) with a synchronous resume
4875 packet, and we're blocked waiting for the stop reply, thus a
4876 Ctrl-C should be immediately sent to the target.
4878 - We get a second Ctrl-C while still within the same serial read or
4879 write. In that case the serial is seemingly wedged --- offer to
4882 - We see a second Ctrl-C without target response, after having
4883 previously interrupted the target. In that case the target/stub
4884 is probably wedged --- offer to quit/disconnect.
4888 remote_serial_quit_handler (void)
4890 struct remote_state
*rs
= get_remote_state ();
4892 if (check_quit_flag ())
4894 /* If we're starting up, we're not fully synced yet. Quit
4896 if (rs
->starting_up
)
4898 else if (rs
->got_ctrlc_during_io
)
4900 if (query (_("The target is not responding to GDB commands.\n"
4901 "Stop debugging it? ")))
4902 remote_unpush_and_throw ();
4904 /* If ^C has already been sent once, offer to disconnect. */
4905 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
4907 /* All-stop protocol, and blocked waiting for stop reply. Send
4908 an interrupt request. */
4909 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
4910 target_interrupt (inferior_ptid
);
4912 rs
->got_ctrlc_during_io
= 1;
4916 /* Remove any of the remote.c targets from target stack. Upper targets depend
4917 on it so remove them first. */
4920 remote_unpush_target (void)
4922 pop_all_targets_at_and_above (process_stratum
);
4926 remote_unpush_and_throw (void)
4928 remote_unpush_target ();
4929 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
4933 remote_open_1 (const char *name
, int from_tty
,
4934 struct target_ops
*target
, int extended_p
)
4936 struct remote_state
*rs
= get_remote_state ();
4939 error (_("To open a remote debug connection, you need to specify what\n"
4940 "serial device is attached to the remote system\n"
4941 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4943 /* See FIXME above. */
4944 if (!target_async_permitted
)
4945 wait_forever_enabled_p
= 1;
4947 /* If we're connected to a running target, target_preopen will kill it.
4948 Ask this question first, before target_preopen has a chance to kill
4950 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
4953 && !query (_("Already connected to a remote target. Disconnect? ")))
4954 error (_("Still connected."));
4957 /* Here the possibly existing remote target gets unpushed. */
4958 target_preopen (from_tty
);
4960 /* Make sure we send the passed signals list the next time we resume. */
4961 xfree (rs
->last_pass_packet
);
4962 rs
->last_pass_packet
= NULL
;
4964 /* Make sure we send the program signals list the next time we
4966 xfree (rs
->last_program_signals_packet
);
4967 rs
->last_program_signals_packet
= NULL
;
4969 remote_fileio_reset ();
4970 reopen_exec_file ();
4973 rs
->remote_desc
= remote_serial_open (name
);
4974 if (!rs
->remote_desc
)
4975 perror_with_name (name
);
4977 if (baud_rate
!= -1)
4979 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
4981 /* The requested speed could not be set. Error out to
4982 top level after closing remote_desc. Take care to
4983 set remote_desc to NULL to avoid closing remote_desc
4985 serial_close (rs
->remote_desc
);
4986 rs
->remote_desc
= NULL
;
4987 perror_with_name (name
);
4991 serial_setparity (rs
->remote_desc
, serial_parity
);
4992 serial_raw (rs
->remote_desc
);
4994 /* If there is something sitting in the buffer we might take it as a
4995 response to a command, which would be bad. */
4996 serial_flush_input (rs
->remote_desc
);
5000 puts_filtered ("Remote debugging using ");
5001 puts_filtered (name
);
5002 puts_filtered ("\n");
5004 push_target (target
); /* Switch to using remote target now. */
5006 /* Register extra event sources in the event loop. */
5007 remote_async_inferior_event_token
5008 = create_async_event_handler (remote_async_inferior_event_handler
,
5010 rs
->notif_state
= remote_notif_state_allocate ();
5012 /* Reset the target state; these things will be queried either by
5013 remote_query_supported or as they are needed. */
5014 reset_all_packet_configs_support ();
5015 rs
->cached_wait_status
= 0;
5016 rs
->explicit_packet_size
= 0;
5018 rs
->extended
= extended_p
;
5019 rs
->waiting_for_stop_reply
= 0;
5020 rs
->ctrlc_pending_p
= 0;
5021 rs
->got_ctrlc_during_io
= 0;
5023 rs
->general_thread
= not_sent_ptid
;
5024 rs
->continue_thread
= not_sent_ptid
;
5025 rs
->remote_traceframe_number
= -1;
5027 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5029 /* Probe for ability to use "ThreadInfo" query, as required. */
5030 rs
->use_threadinfo_query
= 1;
5031 rs
->use_threadextra_query
= 1;
5033 readahead_cache_invalidate ();
5035 if (target_async_permitted
)
5037 /* FIXME: cagney/1999-09-23: During the initial connection it is
5038 assumed that the target is already ready and able to respond to
5039 requests. Unfortunately remote_start_remote() eventually calls
5040 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5041 around this. Eventually a mechanism that allows
5042 wait_for_inferior() to expect/get timeouts will be
5044 wait_forever_enabled_p
= 0;
5047 /* First delete any symbols previously loaded from shared libraries. */
5048 no_shared_libraries (NULL
, 0);
5051 init_thread_list ();
5053 /* Start the remote connection. If error() or QUIT, discard this
5054 target (we'd otherwise be in an inconsistent state) and then
5055 propogate the error on up the exception chain. This ensures that
5056 the caller doesn't stumble along blindly assuming that the
5057 function succeeded. The CLI doesn't have this problem but other
5058 UI's, such as MI do.
5060 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5061 this function should return an error indication letting the
5062 caller restore the previous state. Unfortunately the command
5063 ``target remote'' is directly wired to this function making that
5064 impossible. On a positive note, the CLI side of this problem has
5065 been fixed - the function set_cmd_context() makes it possible for
5066 all the ``target ....'' commands to share a common callback
5067 function. See cli-dump.c. */
5072 remote_start_remote (from_tty
, target
, extended_p
);
5074 CATCH (ex
, RETURN_MASK_ALL
)
5076 /* Pop the partially set up target - unless something else did
5077 already before throwing the exception. */
5078 if (rs
->remote_desc
!= NULL
)
5079 remote_unpush_target ();
5080 if (target_async_permitted
)
5081 wait_forever_enabled_p
= 1;
5082 throw_exception (ex
);
5087 remote_btrace_reset ();
5089 if (target_async_permitted
)
5090 wait_forever_enabled_p
= 1;
5093 /* Detach the specified process. */
5096 remote_detach_pid (int pid
)
5098 struct remote_state
*rs
= get_remote_state ();
5100 if (remote_multi_process_p (rs
))
5101 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5103 strcpy (rs
->buf
, "D");
5106 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5108 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5110 else if (rs
->buf
[0] == '\0')
5111 error (_("Remote doesn't know how to detach"));
5113 error (_("Can't detach process."));
5116 /* This detaches a program to which we previously attached, using
5117 inferior_ptid to identify the process. After this is done, GDB
5118 can be used to debug some other program. We better not have left
5119 any breakpoints in the target program or it'll die when it hits
5123 remote_detach_1 (const char *args
, int from_tty
)
5125 int pid
= ptid_get_pid (inferior_ptid
);
5126 struct remote_state
*rs
= get_remote_state ();
5127 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5131 error (_("Argument given to \"detach\" when remotely debugging."));
5133 if (!target_has_execution
)
5134 error (_("No process to detach from."));
5136 target_announce_detach (from_tty
);
5138 /* Tell the remote target to detach. */
5139 remote_detach_pid (pid
);
5141 /* Exit only if this is the only active inferior. */
5142 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5143 puts_filtered (_("Ending remote debugging.\n"));
5145 /* Check to see if we are detaching a fork parent. Note that if we
5146 are detaching a fork child, tp == NULL. */
5147 is_fork_parent
= (tp
!= NULL
5148 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5150 /* If doing detach-on-fork, we don't mourn, because that will delete
5151 breakpoints that should be available for the followed inferior. */
5152 if (!is_fork_parent
)
5153 target_mourn_inferior (inferior_ptid
);
5156 inferior_ptid
= null_ptid
;
5157 detach_inferior (pid
);
5162 remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5164 remote_detach_1 (args
, from_tty
);
5168 extended_remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5170 remote_detach_1 (args
, from_tty
);
5173 /* Target follow-fork function for remote targets. On entry, and
5174 at return, the current inferior is the fork parent.
5176 Note that although this is currently only used for extended-remote,
5177 it is named remote_follow_fork in anticipation of using it for the
5178 remote target as well. */
5181 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5184 struct remote_state
*rs
= get_remote_state ();
5185 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5187 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5188 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5190 /* When following the parent and detaching the child, we detach
5191 the child here. For the case of following the child and
5192 detaching the parent, the detach is done in the target-
5193 independent follow fork code in infrun.c. We can't use
5194 target_detach when detaching an unfollowed child because
5195 the client side doesn't know anything about the child. */
5196 if (detach_fork
&& !follow_child
)
5198 /* Detach the fork child. */
5202 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5203 child_pid
= ptid_get_pid (child_ptid
);
5205 remote_detach_pid (child_pid
);
5206 detach_inferior (child_pid
);
5212 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5213 in the program space of the new inferior. On entry and at return the
5214 current inferior is the exec'ing inferior. INF is the new exec'd
5215 inferior, which may be the same as the exec'ing inferior unless
5216 follow-exec-mode is "new". */
5219 remote_follow_exec (struct target_ops
*ops
,
5220 struct inferior
*inf
, char *execd_pathname
)
5222 /* We know that this is a target file name, so if it has the "target:"
5223 prefix we strip it off before saving it in the program space. */
5224 if (is_target_filename (execd_pathname
))
5225 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5227 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5230 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5233 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5236 error (_("Argument given to \"disconnect\" when remotely debugging."));
5238 /* Make sure we unpush even the extended remote targets. Calling
5239 target_mourn_inferior won't unpush, and remote_mourn won't
5240 unpush if there is more than one inferior left. */
5241 unpush_target (target
);
5242 generic_mourn_inferior ();
5245 puts_filtered ("Ending remote debugging.\n");
5248 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5249 be chatty about it. */
5252 extended_remote_attach (struct target_ops
*target
, const char *args
,
5255 struct remote_state
*rs
= get_remote_state ();
5257 char *wait_status
= NULL
;
5259 pid
= parse_pid_to_attach (args
);
5261 /* Remote PID can be freely equal to getpid, do not check it here the same
5262 way as in other targets. */
5264 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5265 error (_("This target does not support attaching to a process"));
5269 char *exec_file
= get_exec_file (0);
5272 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5273 target_pid_to_str (pid_to_ptid (pid
)));
5275 printf_unfiltered (_("Attaching to %s\n"),
5276 target_pid_to_str (pid_to_ptid (pid
)));
5278 gdb_flush (gdb_stdout
);
5281 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5283 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5285 switch (packet_ok (rs
->buf
,
5286 &remote_protocol_packets
[PACKET_vAttach
]))
5289 if (!target_is_non_stop_p ())
5291 /* Save the reply for later. */
5292 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5293 strcpy (wait_status
, rs
->buf
);
5295 else if (strcmp (rs
->buf
, "OK") != 0)
5296 error (_("Attaching to %s failed with: %s"),
5297 target_pid_to_str (pid_to_ptid (pid
)),
5300 case PACKET_UNKNOWN
:
5301 error (_("This target does not support attaching to a process"));
5303 error (_("Attaching to %s failed"),
5304 target_pid_to_str (pid_to_ptid (pid
)));
5307 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5309 inferior_ptid
= pid_to_ptid (pid
);
5311 if (target_is_non_stop_p ())
5313 struct thread_info
*thread
;
5315 /* Get list of threads. */
5316 remote_update_thread_list (target
);
5318 thread
= first_thread_of_process (pid
);
5320 inferior_ptid
= thread
->ptid
;
5322 inferior_ptid
= pid_to_ptid (pid
);
5324 /* Invalidate our notion of the remote current thread. */
5325 record_currthread (rs
, minus_one_ptid
);
5329 /* Now, if we have thread information, update inferior_ptid. */
5330 inferior_ptid
= remote_current_thread (inferior_ptid
);
5332 /* Add the main thread to the thread list. */
5333 add_thread_silent (inferior_ptid
);
5336 /* Next, if the target can specify a description, read it. We do
5337 this before anything involving memory or registers. */
5338 target_find_description ();
5340 if (!target_is_non_stop_p ())
5342 /* Use the previously fetched status. */
5343 gdb_assert (wait_status
!= NULL
);
5345 if (target_can_async_p ())
5347 struct notif_event
*reply
5348 = remote_notif_parse (¬if_client_stop
, wait_status
);
5350 push_stop_reply ((struct stop_reply
*) reply
);
5356 gdb_assert (wait_status
!= NULL
);
5357 strcpy (rs
->buf
, wait_status
);
5358 rs
->cached_wait_status
= 1;
5362 gdb_assert (wait_status
== NULL
);
5365 /* Implementation of the to_post_attach method. */
5368 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5370 /* Get text, data & bss offsets. */
5373 /* In certain cases GDB might not have had the chance to start
5374 symbol lookup up until now. This could happen if the debugged
5375 binary is not using shared libraries, the vsyscall page is not
5376 present (on Linux) and the binary itself hadn't changed since the
5377 debugging process was started. */
5378 if (symfile_objfile
!= NULL
)
5379 remote_check_symbols();
5383 /* Check for the availability of vCont. This function should also check
5387 remote_vcont_probe (struct remote_state
*rs
)
5391 strcpy (rs
->buf
, "vCont?");
5393 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5396 /* Make sure that the features we assume are supported. */
5397 if (startswith (buf
, "vCont"))
5400 int support_c
, support_C
;
5402 rs
->supports_vCont
.s
= 0;
5403 rs
->supports_vCont
.S
= 0;
5406 rs
->supports_vCont
.t
= 0;
5407 rs
->supports_vCont
.r
= 0;
5408 while (p
&& *p
== ';')
5411 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5412 rs
->supports_vCont
.s
= 1;
5413 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5414 rs
->supports_vCont
.S
= 1;
5415 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5417 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5419 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5420 rs
->supports_vCont
.t
= 1;
5421 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5422 rs
->supports_vCont
.r
= 1;
5424 p
= strchr (p
, ';');
5427 /* If c, and C are not all supported, we can't use vCont. Clearing
5428 BUF will make packet_ok disable the packet. */
5429 if (!support_c
|| !support_C
)
5433 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5436 /* Helper function for building "vCont" resumptions. Write a
5437 resumption to P. ENDP points to one-passed-the-end of the buffer
5438 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5439 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5440 resumed thread should be single-stepped and/or signalled. If PTID
5441 equals minus_one_ptid, then all threads are resumed; if PTID
5442 represents a process, then all threads of the process are resumed;
5443 the thread to be stepped and/or signalled is given in the global
5447 append_resumption (char *p
, char *endp
,
5448 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5450 struct remote_state
*rs
= get_remote_state ();
5452 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5453 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5455 /* GDB is willing to range step. */
5456 && use_range_stepping
5457 /* Target supports range stepping. */
5458 && rs
->supports_vCont
.r
5459 /* We don't currently support range stepping multiple
5460 threads with a wildcard (though the protocol allows it,
5461 so stubs shouldn't make an active effort to forbid
5463 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5465 struct thread_info
*tp
;
5467 if (ptid_equal (ptid
, minus_one_ptid
))
5469 /* If we don't know about the target thread's tid, then
5470 we're resuming magic_null_ptid (see caller). */
5471 tp
= find_thread_ptid (magic_null_ptid
);
5474 tp
= find_thread_ptid (ptid
);
5475 gdb_assert (tp
!= NULL
);
5477 if (tp
->control
.may_range_step
)
5479 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5481 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5482 phex_nz (tp
->control
.step_range_start
,
5484 phex_nz (tp
->control
.step_range_end
,
5488 p
+= xsnprintf (p
, endp
- p
, ";s");
5491 p
+= xsnprintf (p
, endp
- p
, ";s");
5492 else if (siggnal
!= GDB_SIGNAL_0
)
5493 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5495 p
+= xsnprintf (p
, endp
- p
, ";c");
5497 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5501 /* All (-1) threads of process. */
5502 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5504 p
+= xsnprintf (p
, endp
- p
, ":");
5505 p
= write_ptid (p
, endp
, nptid
);
5507 else if (!ptid_equal (ptid
, minus_one_ptid
))
5509 p
+= xsnprintf (p
, endp
- p
, ":");
5510 p
= write_ptid (p
, endp
, ptid
);
5516 /* Clear the thread's private info on resume. */
5519 resume_clear_thread_private_info (struct thread_info
*thread
)
5521 if (thread
->priv
!= NULL
)
5523 remote_thread_info
*priv
= get_remote_thread_info (thread
);
5525 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5526 priv
->watch_data_address
= 0;
5530 /* Append a vCont continue-with-signal action for threads that have a
5531 non-zero stop signal. */
5534 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5536 struct thread_info
*thread
;
5538 ALL_NON_EXITED_THREADS (thread
)
5539 if (ptid_match (thread
->ptid
, ptid
)
5540 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5541 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5543 p
= append_resumption (p
, endp
, thread
->ptid
,
5544 0, thread
->suspend
.stop_signal
);
5545 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5546 resume_clear_thread_private_info (thread
);
5552 /* Set the target running, using the packets that use Hc
5556 remote_resume_with_hc (struct target_ops
*ops
,
5557 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5559 struct remote_state
*rs
= get_remote_state ();
5560 struct thread_info
*thread
;
5563 rs
->last_sent_signal
= siggnal
;
5564 rs
->last_sent_step
= step
;
5566 /* The c/s/C/S resume packets use Hc, so set the continue
5568 if (ptid_equal (ptid
, minus_one_ptid
))
5569 set_continue_thread (any_thread_ptid
);
5571 set_continue_thread (ptid
);
5573 ALL_NON_EXITED_THREADS (thread
)
5574 resume_clear_thread_private_info (thread
);
5577 if (execution_direction
== EXEC_REVERSE
)
5579 /* We don't pass signals to the target in reverse exec mode. */
5580 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5581 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5584 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5585 error (_("Remote reverse-step not supported."));
5586 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5587 error (_("Remote reverse-continue not supported."));
5589 strcpy (buf
, step
? "bs" : "bc");
5591 else if (siggnal
!= GDB_SIGNAL_0
)
5593 buf
[0] = step
? 'S' : 'C';
5594 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5595 buf
[2] = tohex (((int) siggnal
) & 0xf);
5599 strcpy (buf
, step
? "s" : "c");
5604 /* Resume the remote inferior by using a "vCont" packet. The thread
5605 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5606 resumed thread should be single-stepped and/or signalled. If PTID
5607 equals minus_one_ptid, then all threads are resumed; the thread to
5608 be stepped and/or signalled is given in the global INFERIOR_PTID.
5609 This function returns non-zero iff it resumes the inferior.
5611 This function issues a strict subset of all possible vCont commands
5615 remote_resume_with_vcont (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5617 struct remote_state
*rs
= get_remote_state ();
5621 /* No reverse execution actions defined for vCont. */
5622 if (execution_direction
== EXEC_REVERSE
)
5625 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5626 remote_vcont_probe (rs
);
5628 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5632 endp
= rs
->buf
+ get_remote_packet_size ();
5634 /* If we could generate a wider range of packets, we'd have to worry
5635 about overflowing BUF. Should there be a generic
5636 "multi-part-packet" packet? */
5638 p
+= xsnprintf (p
, endp
- p
, "vCont");
5640 if (ptid_equal (ptid
, magic_null_ptid
))
5642 /* MAGIC_NULL_PTID means that we don't have any active threads,
5643 so we don't have any TID numbers the inferior will
5644 understand. Make sure to only send forms that do not specify
5646 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5648 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5650 /* Resume all threads (of all processes, or of a single
5651 process), with preference for INFERIOR_PTID. This assumes
5652 inferior_ptid belongs to the set of all threads we are about
5654 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5656 /* Step inferior_ptid, with or without signal. */
5657 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5660 /* Also pass down any pending signaled resumption for other
5661 threads not the current. */
5662 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5664 /* And continue others without a signal. */
5665 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5669 /* Scheduler locking; resume only PTID. */
5670 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5673 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5676 if (target_is_non_stop_p ())
5678 /* In non-stop, the stub replies to vCont with "OK". The stop
5679 reply will be reported asynchronously by means of a `%Stop'
5681 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5682 if (strcmp (rs
->buf
, "OK") != 0)
5683 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5689 /* Tell the remote machine to resume. */
5692 remote_resume (struct target_ops
*ops
,
5693 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5695 struct remote_state
*rs
= get_remote_state ();
5697 /* When connected in non-stop mode, the core resumes threads
5698 individually. Resuming remote threads directly in target_resume
5699 would thus result in sending one packet per thread. Instead, to
5700 minimize roundtrip latency, here we just store the resume
5701 request; the actual remote resumption will be done in
5702 target_commit_resume / remote_commit_resume, where we'll be able
5703 to do vCont action coalescing. */
5704 if (target_is_non_stop_p () && execution_direction
!= EXEC_REVERSE
)
5706 remote_thread_info
*remote_thr
;
5708 if (ptid_equal (minus_one_ptid
, ptid
) || ptid_is_pid (ptid
))
5709 remote_thr
= get_remote_thread_info (inferior_ptid
);
5711 remote_thr
= get_remote_thread_info (ptid
);
5713 remote_thr
->last_resume_step
= step
;
5714 remote_thr
->last_resume_sig
= siggnal
;
5718 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5719 (explained in remote-notif.c:handle_notification) so
5720 remote_notif_process is not called. We need find a place where
5721 it is safe to start a 'vNotif' sequence. It is good to do it
5722 before resuming inferior, because inferior was stopped and no RSP
5723 traffic at that moment. */
5724 if (!target_is_non_stop_p ())
5725 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5727 rs
->last_resume_exec_dir
= execution_direction
;
5729 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5730 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
5731 remote_resume_with_hc (ops
, ptid
, step
, siggnal
);
5733 /* We are about to start executing the inferior, let's register it
5734 with the event loop. NOTE: this is the one place where all the
5735 execution commands end up. We could alternatively do this in each
5736 of the execution commands in infcmd.c. */
5737 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5738 into infcmd.c in order to allow inferior function calls to work
5739 NOT asynchronously. */
5740 if (target_can_async_p ())
5743 /* We've just told the target to resume. The remote server will
5744 wait for the inferior to stop, and then send a stop reply. In
5745 the mean time, we can't start another command/query ourselves
5746 because the stub wouldn't be ready to process it. This applies
5747 only to the base all-stop protocol, however. In non-stop (which
5748 only supports vCont), the stub replies with an "OK", and is
5749 immediate able to process further serial input. */
5750 if (!target_is_non_stop_p ())
5751 rs
->waiting_for_stop_reply
= 1;
5754 static void check_pending_events_prevent_wildcard_vcont
5755 (int *may_global_wildcard_vcont
);
5756 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
5758 /* Private per-inferior info for target remote processes. */
5760 struct remote_inferior
: public private_inferior
5762 /* Whether we can send a wildcard vCont for this process. */
5763 bool may_wildcard_vcont
= true;
5766 /* Get the remote private inferior data associated to INF. */
5768 static remote_inferior
*
5769 get_remote_inferior (inferior
*inf
)
5771 if (inf
->priv
== NULL
)
5772 inf
->priv
.reset (new remote_inferior
);
5774 return static_cast<remote_inferior
*> (inf
->priv
.get ());
5777 /* Structure used to track the construction of a vCont packet in the
5778 outgoing packet buffer. This is used to send multiple vCont
5779 packets if we have more actions than would fit a single packet. */
5781 struct vcont_builder
5783 /* Pointer to the first action. P points here if no action has been
5787 /* Where the next action will be appended. */
5790 /* The end of the buffer. Must never write past this. */
5794 /* Prepare the outgoing buffer for a new vCont packet. */
5797 vcont_builder_restart (struct vcont_builder
*builder
)
5799 struct remote_state
*rs
= get_remote_state ();
5801 builder
->p
= rs
->buf
;
5802 builder
->endp
= rs
->buf
+ get_remote_packet_size ();
5803 builder
->p
+= xsnprintf (builder
->p
, builder
->endp
- builder
->p
, "vCont");
5804 builder
->first_action
= builder
->p
;
5807 /* If the vCont packet being built has any action, send it to the
5811 vcont_builder_flush (struct vcont_builder
*builder
)
5813 struct remote_state
*rs
;
5815 if (builder
->p
== builder
->first_action
)
5818 rs
= get_remote_state ();
5820 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5821 if (strcmp (rs
->buf
, "OK") != 0)
5822 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5825 /* The largest action is range-stepping, with its two addresses. This
5826 is more than sufficient. If a new, bigger action is created, it'll
5827 quickly trigger a failed assertion in append_resumption (and we'll
5829 #define MAX_ACTION_SIZE 200
5831 /* Append a new vCont action in the outgoing packet being built. If
5832 the action doesn't fit the packet along with previous actions, push
5833 what we've got so far to the remote end and start over a new vCont
5834 packet (with the new action). */
5837 vcont_builder_push_action (struct vcont_builder
*builder
,
5838 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5840 char buf
[MAX_ACTION_SIZE
+ 1];
5844 endp
= append_resumption (buf
, buf
+ sizeof (buf
),
5845 ptid
, step
, siggnal
);
5847 /* Check whether this new action would fit in the vCont packet along
5848 with previous actions. If not, send what we've got so far and
5849 start a new vCont packet. */
5851 if (rsize
> builder
->endp
- builder
->p
)
5853 vcont_builder_flush (builder
);
5854 vcont_builder_restart (builder
);
5856 /* Should now fit. */
5857 gdb_assert (rsize
<= builder
->endp
- builder
->p
);
5860 memcpy (builder
->p
, buf
, rsize
);
5861 builder
->p
+= rsize
;
5865 /* to_commit_resume implementation. */
5868 remote_commit_resume (struct target_ops
*ops
)
5870 struct inferior
*inf
;
5871 struct thread_info
*tp
;
5872 int any_process_wildcard
;
5873 int may_global_wildcard_vcont
;
5874 struct vcont_builder vcont_builder
;
5876 /* If connected in all-stop mode, we'd send the remote resume
5877 request directly from remote_resume. Likewise if
5878 reverse-debugging, as there are no defined vCont actions for
5879 reverse execution. */
5880 if (!target_is_non_stop_p () || execution_direction
== EXEC_REVERSE
)
5883 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5884 instead of resuming all threads of each process individually.
5885 However, if any thread of a process must remain halted, we can't
5886 send wildcard resumes and must send one action per thread.
5888 Care must be taken to not resume threads/processes the server
5889 side already told us are stopped, but the core doesn't know about
5890 yet, because the events are still in the vStopped notification
5893 #1 => vCont s:p1.1;c
5895 #3 <= %Stopped T05 p1.1
5900 #8 (infrun handles the stop for p1.1 and continues stepping)
5901 #9 => vCont s:p1.1;c
5903 The last vCont above would resume thread p1.2 by mistake, because
5904 the server has no idea that the event for p1.2 had not been
5907 The server side must similarly ignore resume actions for the
5908 thread that has a pending %Stopped notification (and any other
5909 threads with events pending), until GDB acks the notification
5910 with vStopped. Otherwise, e.g., the following case is
5913 #1 => g (or any other packet)
5915 #3 <= %Stopped T05 p1.2
5916 #4 => vCont s:p1.1;c
5919 Above, the server must not resume thread p1.2. GDB can't know
5920 that p1.2 stopped until it acks the %Stopped notification, and
5921 since from GDB's perspective all threads should be running, it
5924 Finally, special care must also be given to handling fork/vfork
5925 events. A (v)fork event actually tells us that two processes
5926 stopped -- the parent and the child. Until we follow the fork,
5927 we must not resume the child. Therefore, if we have a pending
5928 fork follow, we must not send a global wildcard resume action
5929 (vCont;c). We can still send process-wide wildcards though. */
5931 /* Start by assuming a global wildcard (vCont;c) is possible. */
5932 may_global_wildcard_vcont
= 1;
5934 /* And assume every process is individually wildcard-able too. */
5935 ALL_NON_EXITED_INFERIORS (inf
)
5937 remote_inferior
*priv
= get_remote_inferior (inf
);
5939 priv
->may_wildcard_vcont
= true;
5942 /* Check for any pending events (not reported or processed yet) and
5943 disable process and global wildcard resumes appropriately. */
5944 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
5946 ALL_NON_EXITED_THREADS (tp
)
5948 /* If a thread of a process is not meant to be resumed, then we
5949 can't wildcard that process. */
5952 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
5954 /* And if we can't wildcard a process, we can't wildcard
5955 everything either. */
5956 may_global_wildcard_vcont
= 0;
5960 /* If a thread is the parent of an unfollowed fork, then we
5961 can't do a global wildcard, as that would resume the fork
5963 if (is_pending_fork_parent_thread (tp
))
5964 may_global_wildcard_vcont
= 0;
5967 /* Now let's build the vCont packet(s). Actions must be appended
5968 from narrower to wider scopes (thread -> process -> global). If
5969 we end up with too many actions for a single packet vcont_builder
5970 flushes the current vCont packet to the remote side and starts a
5972 vcont_builder_restart (&vcont_builder
);
5974 /* Threads first. */
5975 ALL_NON_EXITED_THREADS (tp
)
5977 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
5979 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
5982 gdb_assert (!thread_is_in_step_over_chain (tp
));
5984 if (!remote_thr
->last_resume_step
5985 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
5986 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
5988 /* We'll send a wildcard resume instead. */
5989 remote_thr
->vcont_resumed
= 1;
5993 vcont_builder_push_action (&vcont_builder
, tp
->ptid
,
5994 remote_thr
->last_resume_step
,
5995 remote_thr
->last_resume_sig
);
5996 remote_thr
->vcont_resumed
= 1;
5999 /* Now check whether we can send any process-wide wildcard. This is
6000 to avoid sending a global wildcard in the case nothing is
6001 supposed to be resumed. */
6002 any_process_wildcard
= 0;
6004 ALL_NON_EXITED_INFERIORS (inf
)
6006 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6008 any_process_wildcard
= 1;
6013 if (any_process_wildcard
)
6015 /* If all processes are wildcard-able, then send a single "c"
6016 action, otherwise, send an "all (-1) threads of process"
6017 continue action for each running process, if any. */
6018 if (may_global_wildcard_vcont
)
6020 vcont_builder_push_action (&vcont_builder
, minus_one_ptid
,
6025 ALL_NON_EXITED_INFERIORS (inf
)
6027 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6029 vcont_builder_push_action (&vcont_builder
,
6030 pid_to_ptid (inf
->pid
),
6037 vcont_builder_flush (&vcont_builder
);
6042 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6043 thread, all threads of a remote process, or all threads of all
6047 remote_stop_ns (ptid_t ptid
)
6049 struct remote_state
*rs
= get_remote_state ();
6051 char *endp
= rs
->buf
+ get_remote_packet_size ();
6053 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6054 remote_vcont_probe (rs
);
6056 if (!rs
->supports_vCont
.t
)
6057 error (_("Remote server does not support stopping threads"));
6059 if (ptid_equal (ptid
, minus_one_ptid
)
6060 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
6061 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6066 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6068 if (ptid_is_pid (ptid
))
6069 /* All (-1) threads of process. */
6070 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
6073 /* Small optimization: if we already have a stop reply for
6074 this thread, no use in telling the stub we want this
6076 if (peek_stop_reply (ptid
))
6082 write_ptid (p
, endp
, nptid
);
6085 /* In non-stop, we get an immediate OK reply. The stop reply will
6086 come in asynchronously by notification. */
6088 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6089 if (strcmp (rs
->buf
, "OK") != 0)
6090 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6093 /* All-stop version of target_interrupt. Sends a break or a ^C to
6094 interrupt the remote target. It is undefined which thread of which
6095 process reports the interrupt. */
6098 remote_interrupt_as (void)
6100 struct remote_state
*rs
= get_remote_state ();
6102 rs
->ctrlc_pending_p
= 1;
6104 /* If the inferior is stopped already, but the core didn't know
6105 about it yet, just ignore the request. The cached wait status
6106 will be collected in remote_wait. */
6107 if (rs
->cached_wait_status
)
6110 /* Send interrupt_sequence to remote target. */
6111 send_interrupt_sequence ();
6114 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6115 the remote target. It is undefined which thread of which process
6116 reports the interrupt. Throws an error if the packet is not
6117 supported by the server. */
6120 remote_interrupt_ns (void)
6122 struct remote_state
*rs
= get_remote_state ();
6124 char *endp
= rs
->buf
+ get_remote_packet_size ();
6126 xsnprintf (p
, endp
- p
, "vCtrlC");
6128 /* In non-stop, we get an immediate OK reply. The stop reply will
6129 come in asynchronously by notification. */
6131 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6133 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6137 case PACKET_UNKNOWN
:
6138 error (_("No support for interrupting the remote target."));
6140 error (_("Interrupting target failed: %s"), rs
->buf
);
6144 /* Implement the to_stop function for the remote targets. */
6147 remote_stop (struct target_ops
*self
, ptid_t ptid
)
6150 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6152 if (target_is_non_stop_p ())
6153 remote_stop_ns (ptid
);
6156 /* We don't currently have a way to transparently pause the
6157 remote target in all-stop mode. Interrupt it instead. */
6158 remote_interrupt_as ();
6162 /* Implement the to_interrupt function for the remote targets. */
6165 remote_interrupt (struct target_ops
*self
, ptid_t ptid
)
6168 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6170 if (target_is_non_stop_p ())
6171 remote_interrupt_ns ();
6173 remote_interrupt_as ();
6176 /* Implement the to_pass_ctrlc function for the remote targets. */
6179 remote_pass_ctrlc (struct target_ops
*self
)
6181 struct remote_state
*rs
= get_remote_state ();
6184 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6186 /* If we're starting up, we're not fully synced yet. Quit
6188 if (rs
->starting_up
)
6190 /* If ^C has already been sent once, offer to disconnect. */
6191 else if (rs
->ctrlc_pending_p
)
6194 target_interrupt (inferior_ptid
);
6197 /* Ask the user what to do when an interrupt is received. */
6200 interrupt_query (void)
6202 struct remote_state
*rs
= get_remote_state ();
6204 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6206 if (query (_("The target is not responding to interrupt requests.\n"
6207 "Stop debugging it? ")))
6209 remote_unpush_target ();
6210 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6215 if (query (_("Interrupted while waiting for the program.\n"
6216 "Give up waiting? ")))
6221 /* Enable/disable target terminal ownership. Most targets can use
6222 terminal groups to control terminal ownership. Remote targets are
6223 different in that explicit transfer of ownership to/from GDB/target
6227 remote_terminal_inferior (struct target_ops
*self
)
6229 /* NOTE: At this point we could also register our selves as the
6230 recipient of all input. Any characters typed could then be
6231 passed on down to the target. */
6235 remote_terminal_ours (struct target_ops
*self
)
6240 remote_console_output (char *msg
)
6244 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6247 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6251 fputs_unfiltered (tb
, gdb_stdtarg
);
6253 gdb_flush (gdb_stdtarg
);
6256 DEF_VEC_O(cached_reg_t
);
6258 typedef struct stop_reply
6260 struct notif_event base
;
6262 /* The identifier of the thread about this event */
6265 /* The remote state this event is associated with. When the remote
6266 connection, represented by a remote_state object, is closed,
6267 all the associated stop_reply events should be released. */
6268 struct remote_state
*rs
;
6270 struct target_waitstatus ws
;
6272 /* The architecture associated with the expedited registers. */
6275 /* Expedited registers. This makes remote debugging a bit more
6276 efficient for those targets that provide critical registers as
6277 part of their normal status mechanism (as another roundtrip to
6278 fetch them is avoided). */
6279 VEC(cached_reg_t
) *regcache
;
6281 enum target_stop_reason stop_reason
;
6283 CORE_ADDR watch_data_address
;
6288 DECLARE_QUEUE_P (stop_reply_p
);
6289 DEFINE_QUEUE_P (stop_reply_p
);
6290 /* The list of already fetched and acknowledged stop events. This
6291 queue is used for notification Stop, and other notifications
6292 don't need queue for their events, because the notification events
6293 of Stop can't be consumed immediately, so that events should be
6294 queued first, and be consumed by remote_wait_{ns,as} one per
6295 time. Other notifications can consume their events immediately,
6296 so queue is not needed for them. */
6297 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6300 stop_reply_xfree (struct stop_reply
*r
)
6302 notif_event_xfree ((struct notif_event
*) r
);
6305 /* Return the length of the stop reply queue. */
6308 stop_reply_queue_length (void)
6310 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6314 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6315 struct notif_event
*event
)
6317 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6321 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6322 struct notif_event
*event
)
6324 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6327 putpkt (self
->ack_command
);
6329 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6330 /* We got an unknown stop reply. */
6331 error (_("Unknown stop reply"));
6333 push_stop_reply (stop_reply
);
6337 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6339 /* We can't get pending events in remote_notif_process for
6340 notification stop, and we have to do this in remote_wait_ns
6341 instead. If we fetch all queued events from stub, remote stub
6342 may exit and we have no chance to process them back in
6344 mark_async_event_handler (remote_async_inferior_event_token
);
6349 stop_reply_dtr (struct notif_event
*event
)
6351 struct stop_reply
*r
= (struct stop_reply
*) event
;
6356 VEC_iterate (cached_reg_t
, r
->regcache
, ix
, reg
);
6360 VEC_free (cached_reg_t
, r
->regcache
);
6363 static struct notif_event
*
6364 remote_notif_stop_alloc_reply (void)
6366 /* We cast to a pointer to the "base class". */
6367 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6369 r
->dtr
= stop_reply_dtr
;
6374 /* A client of notification Stop. */
6376 struct notif_client notif_client_stop
=
6380 remote_notif_stop_parse
,
6381 remote_notif_stop_ack
,
6382 remote_notif_stop_can_get_pending_events
,
6383 remote_notif_stop_alloc_reply
,
6387 /* A parameter to pass data in and out. */
6389 struct queue_iter_param
6392 struct stop_reply
*output
;
6395 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6396 the pid of the process that owns the threads we want to check, or
6397 -1 if we want to check all threads. */
6400 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6403 if (ws
->kind
== TARGET_WAITKIND_FORKED
6404 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6406 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6413 /* Return the thread's pending status used to determine whether the
6414 thread is a fork parent stopped at a fork event. */
6416 static struct target_waitstatus
*
6417 thread_pending_fork_status (struct thread_info
*thread
)
6419 if (thread
->suspend
.waitstatus_pending_p
)
6420 return &thread
->suspend
.waitstatus
;
6422 return &thread
->pending_follow
;
6425 /* Determine if THREAD is a pending fork parent thread. */
6428 is_pending_fork_parent_thread (struct thread_info
*thread
)
6430 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6433 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6436 /* Check whether EVENT is a fork event, and if it is, remove the
6437 fork child from the context list passed in DATA. */
6440 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6441 QUEUE_ITER (stop_reply_p
) *iter
,
6445 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6446 struct threads_listing_context
*context
6447 = (struct threads_listing_context
*) param
->input
;
6449 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6450 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6451 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6452 context
->remove_thread (event
->ws
.value
.related_pid
);
6457 /* If CONTEXT contains any fork child threads that have not been
6458 reported yet, remove them from the CONTEXT list. If such a
6459 thread exists it is because we are stopped at a fork catchpoint
6460 and have not yet called follow_fork, which will set up the
6461 host-side data structures for the new process. */
6464 remove_new_fork_children (struct threads_listing_context
*context
)
6466 struct thread_info
* thread
;
6468 struct notif_client
*notif
= ¬if_client_stop
;
6469 struct queue_iter_param param
;
6471 /* For any threads stopped at a fork event, remove the corresponding
6472 fork child threads from the CONTEXT list. */
6473 ALL_NON_EXITED_THREADS (thread
)
6475 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6477 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6478 context
->remove_thread (ws
->value
.related_pid
);
6481 /* Check for any pending fork events (not reported or processed yet)
6482 in process PID and remove those fork child threads from the
6483 CONTEXT list as well. */
6484 remote_notif_get_pending_events (notif
);
6485 param
.input
= context
;
6486 param
.output
= NULL
;
6487 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6488 remove_child_of_pending_fork
, ¶m
);
6491 /* Check whether EVENT would prevent a global or process wildcard
6495 check_pending_event_prevents_wildcard_vcont_callback
6496 (QUEUE (stop_reply_p
) *q
,
6497 QUEUE_ITER (stop_reply_p
) *iter
,
6501 struct inferior
*inf
;
6502 int *may_global_wildcard_vcont
= (int *) data
;
6504 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6505 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6508 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6509 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6510 *may_global_wildcard_vcont
= 0;
6512 inf
= find_inferior_ptid (event
->ptid
);
6514 /* This may be the first time we heard about this process.
6515 Regardless, we must not do a global wildcard resume, otherwise
6516 we'd resume this process too. */
6517 *may_global_wildcard_vcont
= 0;
6519 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
6524 /* Check whether any event pending in the vStopped queue would prevent
6525 a global or process wildcard vCont action. Clear
6526 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6527 and clear the event inferior's may_wildcard_vcont flag if we can't
6528 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6531 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard
)
6533 struct notif_client
*notif
= ¬if_client_stop
;
6535 remote_notif_get_pending_events (notif
);
6536 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6537 check_pending_event_prevents_wildcard_vcont_callback
,
6538 may_global_wildcard
);
6541 /* Remove stop replies in the queue if its pid is equal to the given
6545 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6546 QUEUE_ITER (stop_reply_p
) *iter
,
6550 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6551 struct inferior
*inf
= (struct inferior
*) param
->input
;
6553 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6555 stop_reply_xfree (event
);
6556 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6562 /* Discard all pending stop replies of inferior INF. */
6565 discard_pending_stop_replies (struct inferior
*inf
)
6567 struct queue_iter_param param
;
6568 struct stop_reply
*reply
;
6569 struct remote_state
*rs
= get_remote_state ();
6570 struct remote_notif_state
*rns
= rs
->notif_state
;
6572 /* This function can be notified when an inferior exists. When the
6573 target is not remote, the notification state is NULL. */
6574 if (rs
->remote_desc
== NULL
)
6577 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6579 /* Discard the in-flight notification. */
6580 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6582 stop_reply_xfree (reply
);
6583 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6587 param
.output
= NULL
;
6588 /* Discard the stop replies we have already pulled with
6590 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6591 remove_stop_reply_for_inferior
, ¶m
);
6594 /* If its remote state is equal to the given remote state,
6595 remove EVENT from the stop reply queue. */
6598 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6599 QUEUE_ITER (stop_reply_p
) *iter
,
6603 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6604 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6606 if (event
->rs
== rs
)
6608 stop_reply_xfree (event
);
6609 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6615 /* Discard the stop replies for RS in stop_reply_queue. */
6618 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6620 struct queue_iter_param param
;
6623 param
.output
= NULL
;
6624 /* Discard the stop replies we have already pulled with
6626 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6627 remove_stop_reply_of_remote_state
, ¶m
);
6630 /* A parameter to pass data in and out. */
6633 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6634 QUEUE_ITER (stop_reply_p
) *iter
,
6638 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6639 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6641 if (ptid_match (event
->ptid
, *ptid
))
6643 param
->output
= event
;
6644 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6651 /* Remove the first reply in 'stop_reply_queue' which matches
6654 static struct stop_reply
*
6655 remote_notif_remove_queued_reply (ptid_t ptid
)
6657 struct queue_iter_param param
;
6659 param
.input
= &ptid
;
6660 param
.output
= NULL
;
6662 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6663 remote_notif_remove_once_on_match
, ¶m
);
6665 fprintf_unfiltered (gdb_stdlog
,
6666 "notif: discard queued event: 'Stop' in %s\n",
6667 target_pid_to_str (ptid
));
6669 return param
.output
;
6672 /* Look for a queued stop reply belonging to PTID. If one is found,
6673 remove it from the queue, and return it. Returns NULL if none is
6674 found. If there are still queued events left to process, tell the
6675 event loop to get back to target_wait soon. */
6677 static struct stop_reply
*
6678 queued_stop_reply (ptid_t ptid
)
6680 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6682 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6683 /* There's still at least an event left. */
6684 mark_async_event_handler (remote_async_inferior_event_token
);
6689 /* Push a fully parsed stop reply in the stop reply queue. Since we
6690 know that we now have at least one queued event left to pass to the
6691 core side, tell the event loop to get back to target_wait soon. */
6694 push_stop_reply (struct stop_reply
*new_event
)
6696 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6699 fprintf_unfiltered (gdb_stdlog
,
6700 "notif: push 'Stop' %s to queue %d\n",
6701 target_pid_to_str (new_event
->ptid
),
6702 QUEUE_length (stop_reply_p
,
6705 mark_async_event_handler (remote_async_inferior_event_token
);
6709 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6710 QUEUE_ITER (stop_reply_p
) *iter
,
6711 struct stop_reply
*event
,
6714 ptid_t
*ptid
= (ptid_t
*) data
;
6716 return !(ptid_equal (*ptid
, event
->ptid
)
6717 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6720 /* Returns true if we have a stop reply for PTID. */
6723 peek_stop_reply (ptid_t ptid
)
6725 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6726 stop_reply_match_ptid_and_ws
, &ptid
);
6729 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6730 starting with P and ending with PEND matches PREFIX. */
6733 strprefix (const char *p
, const char *pend
, const char *prefix
)
6735 for ( ; p
< pend
; p
++, prefix
++)
6738 return *prefix
== '\0';
6741 /* Parse the stop reply in BUF. Either the function succeeds, and the
6742 result is stored in EVENT, or throws an error. */
6745 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6747 remote_arch_state
*rsa
= NULL
;
6752 event
->ptid
= null_ptid
;
6753 event
->rs
= get_remote_state ();
6754 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6755 event
->ws
.value
.integer
= 0;
6756 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6757 event
->regcache
= NULL
;
6762 case 'T': /* Status with PC, SP, FP, ... */
6763 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6764 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6766 n... = register number
6767 r... = register contents
6770 p
= &buf
[3]; /* after Txx */
6776 p1
= strchr (p
, ':');
6778 error (_("Malformed packet(a) (missing colon): %s\n\
6782 error (_("Malformed packet(a) (missing register number): %s\n\
6786 /* Some "registers" are actually extended stop information.
6787 Note if you're adding a new entry here: GDB 7.9 and
6788 earlier assume that all register "numbers" that start
6789 with an hex digit are real register numbers. Make sure
6790 the server only sends such a packet if it knows the
6791 client understands it. */
6793 if (strprefix (p
, p1
, "thread"))
6794 event
->ptid
= read_ptid (++p1
, &p
);
6795 else if (strprefix (p
, p1
, "syscall_entry"))
6799 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6800 p
= unpack_varlen_hex (++p1
, &sysno
);
6801 event
->ws
.value
.syscall_number
= (int) sysno
;
6803 else if (strprefix (p
, p1
, "syscall_return"))
6807 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6808 p
= unpack_varlen_hex (++p1
, &sysno
);
6809 event
->ws
.value
.syscall_number
= (int) sysno
;
6811 else if (strprefix (p
, p1
, "watch")
6812 || strprefix (p
, p1
, "rwatch")
6813 || strprefix (p
, p1
, "awatch"))
6815 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6816 p
= unpack_varlen_hex (++p1
, &addr
);
6817 event
->watch_data_address
= (CORE_ADDR
) addr
;
6819 else if (strprefix (p
, p1
, "swbreak"))
6821 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6823 /* Make sure the stub doesn't forget to indicate support
6825 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6826 error (_("Unexpected swbreak stop reason"));
6828 /* The value part is documented as "must be empty",
6829 though we ignore it, in case we ever decide to make
6830 use of it in a backward compatible way. */
6831 p
= strchrnul (p1
+ 1, ';');
6833 else if (strprefix (p
, p1
, "hwbreak"))
6835 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6837 /* Make sure the stub doesn't forget to indicate support
6839 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6840 error (_("Unexpected hwbreak stop reason"));
6843 p
= strchrnul (p1
+ 1, ';');
6845 else if (strprefix (p
, p1
, "library"))
6847 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6848 p
= strchrnul (p1
+ 1, ';');
6850 else if (strprefix (p
, p1
, "replaylog"))
6852 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6853 /* p1 will indicate "begin" or "end", but it makes
6854 no difference for now, so ignore it. */
6855 p
= strchrnul (p1
+ 1, ';');
6857 else if (strprefix (p
, p1
, "core"))
6861 p
= unpack_varlen_hex (++p1
, &c
);
6864 else if (strprefix (p
, p1
, "fork"))
6866 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6867 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6869 else if (strprefix (p
, p1
, "vfork"))
6871 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6872 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6874 else if (strprefix (p
, p1
, "vforkdone"))
6876 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6877 p
= strchrnul (p1
+ 1, ';');
6879 else if (strprefix (p
, p1
, "exec"))
6882 char pathname
[PATH_MAX
];
6885 /* Determine the length of the execd pathname. */
6886 p
= unpack_varlen_hex (++p1
, &ignored
);
6887 pathlen
= (p
- p1
) / 2;
6889 /* Save the pathname for event reporting and for
6890 the next run command. */
6891 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6892 pathname
[pathlen
] = '\0';
6894 /* This is freed during event handling. */
6895 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6896 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6898 /* Skip the registers included in this packet, since
6899 they may be for an architecture different from the
6900 one used by the original program. */
6903 else if (strprefix (p
, p1
, "create"))
6905 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
6906 p
= strchrnul (p1
+ 1, ';');
6915 p
= strchrnul (p1
+ 1, ';');
6920 /* Maybe a real ``P'' register number. */
6921 p_temp
= unpack_varlen_hex (p
, &pnum
);
6922 /* If the first invalid character is the colon, we got a
6923 register number. Otherwise, it's an unknown stop
6927 /* If we haven't parsed the event's thread yet, find
6928 it now, in order to find the architecture of the
6929 reported expedited registers. */
6930 if (event
->ptid
== null_ptid
)
6932 const char *thr
= strstr (p1
+ 1, ";thread:");
6934 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
6937 event
->ptid
= magic_null_ptid
;
6942 inferior
*inf
= (event
->ptid
== null_ptid
6944 : find_inferior_ptid (event
->ptid
));
6945 /* If this is the first time we learn anything
6946 about this process, skip the registers
6947 included in this packet, since we don't yet
6948 know which architecture to use to parse them.
6949 We'll determine the architecture later when
6950 we process the stop reply and retrieve the
6951 target description, via
6952 remote_notice_new_inferior ->
6953 post_create_inferior. */
6956 p
= strchrnul (p1
+ 1, ';');
6961 event
->arch
= inf
->gdbarch
;
6962 rsa
= get_remote_arch_state (event
->arch
);
6966 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
6967 cached_reg_t cached_reg
;
6970 error (_("Remote sent bad register number %s: %s\n\
6972 hex_string (pnum
), p
, buf
);
6974 cached_reg
.num
= reg
->regnum
;
6975 cached_reg
.data
= (gdb_byte
*)
6976 xmalloc (register_size (event
->arch
, reg
->regnum
));
6979 fieldsize
= hex2bin (p
, cached_reg
.data
,
6980 register_size (event
->arch
, reg
->regnum
));
6982 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
6983 warning (_("Remote reply is too short: %s"), buf
);
6985 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
6989 /* Not a number. Silently skip unknown optional
6991 p
= strchrnul (p1
+ 1, ';');
6996 error (_("Remote register badly formatted: %s\nhere: %s"),
7001 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7005 case 'S': /* Old style status, just signal only. */
7009 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7010 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7011 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7012 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7014 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7017 case 'w': /* Thread exited. */
7022 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7023 p
= unpack_varlen_hex (&buf
[1], &value
);
7024 event
->ws
.value
.integer
= value
;
7026 error (_("stop reply packet badly formatted: %s"), buf
);
7027 event
->ptid
= read_ptid (++p
, NULL
);
7030 case 'W': /* Target exited. */
7037 /* GDB used to accept only 2 hex chars here. Stubs should
7038 only send more if they detect GDB supports multi-process
7040 p
= unpack_varlen_hex (&buf
[1], &value
);
7044 /* The remote process exited. */
7045 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7046 event
->ws
.value
.integer
= value
;
7050 /* The remote process exited with a signal. */
7051 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7052 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7053 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7055 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7058 /* If no process is specified, assume inferior_ptid. */
7059 pid
= ptid_get_pid (inferior_ptid
);
7068 else if (startswith (p
, "process:"))
7072 p
+= sizeof ("process:") - 1;
7073 unpack_varlen_hex (p
, &upid
);
7077 error (_("unknown stop reply packet: %s"), buf
);
7080 error (_("unknown stop reply packet: %s"), buf
);
7081 event
->ptid
= pid_to_ptid (pid
);
7085 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7086 event
->ptid
= minus_one_ptid
;
7090 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
7091 error (_("No process or thread specified in stop reply: %s"), buf
);
7094 /* When the stub wants to tell GDB about a new notification reply, it
7095 sends a notification (%Stop, for example). Those can come it at
7096 any time, hence, we have to make sure that any pending
7097 putpkt/getpkt sequence we're making is finished, before querying
7098 the stub for more events with the corresponding ack command
7099 (vStopped, for example). E.g., if we started a vStopped sequence
7100 immediately upon receiving the notification, something like this
7108 1.6) <-- (registers reply to step #1.3)
7110 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7113 To solve this, whenever we parse a %Stop notification successfully,
7114 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7115 doing whatever we were doing:
7121 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7122 2.5) <-- (registers reply to step #2.3)
7124 Eventualy after step #2.5, we return to the event loop, which
7125 notices there's an event on the
7126 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7127 associated callback --- the function below. At this point, we're
7128 always safe to start a vStopped sequence. :
7131 2.7) <-- T05 thread:2
7137 remote_notif_get_pending_events (struct notif_client
*nc
)
7139 struct remote_state
*rs
= get_remote_state ();
7141 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7144 fprintf_unfiltered (gdb_stdlog
,
7145 "notif: process: '%s' ack pending event\n",
7149 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7150 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7154 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7155 if (strcmp (rs
->buf
, "OK") == 0)
7158 remote_notif_ack (nc
, rs
->buf
);
7164 fprintf_unfiltered (gdb_stdlog
,
7165 "notif: process: '%s' no pending reply\n",
7170 /* Called when it is decided that STOP_REPLY holds the info of the
7171 event that is to be returned to the core. This function always
7172 destroys STOP_REPLY. */
7175 process_stop_reply (struct stop_reply
*stop_reply
,
7176 struct target_waitstatus
*status
)
7180 *status
= stop_reply
->ws
;
7181 ptid
= stop_reply
->ptid
;
7183 /* If no thread/process was reported by the stub, assume the current
7185 if (ptid_equal (ptid
, null_ptid
))
7186 ptid
= inferior_ptid
;
7188 if (status
->kind
!= TARGET_WAITKIND_EXITED
7189 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7190 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7192 /* Expedited registers. */
7193 if (stop_reply
->regcache
)
7195 struct regcache
*regcache
7196 = get_thread_arch_regcache (ptid
, stop_reply
->arch
);
7201 VEC_iterate (cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7204 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
7208 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7211 remote_notice_new_inferior (ptid
, 0);
7212 remote_thread_info
*remote_thr
= get_remote_thread_info (ptid
);
7213 remote_thr
->core
= stop_reply
->core
;
7214 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7215 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7216 remote_thr
->vcont_resumed
= 0;
7219 stop_reply_xfree (stop_reply
);
7223 /* The non-stop mode version of target_wait. */
7226 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7228 struct remote_state
*rs
= get_remote_state ();
7229 struct stop_reply
*stop_reply
;
7233 /* If in non-stop mode, get out of getpkt even if a
7234 notification is received. */
7236 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7237 0 /* forever */, &is_notif
);
7240 if (ret
!= -1 && !is_notif
)
7243 case 'E': /* Error of some sort. */
7244 /* We're out of sync with the target now. Did it continue
7245 or not? We can't tell which thread it was in non-stop,
7246 so just ignore this. */
7247 warning (_("Remote failure reply: %s"), rs
->buf
);
7249 case 'O': /* Console output. */
7250 remote_console_output (rs
->buf
+ 1);
7253 warning (_("Invalid remote reply: %s"), rs
->buf
);
7257 /* Acknowledge a pending stop reply that may have arrived in the
7259 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7260 remote_notif_get_pending_events (¬if_client_stop
);
7262 /* If indeed we noticed a stop reply, we're done. */
7263 stop_reply
= queued_stop_reply (ptid
);
7264 if (stop_reply
!= NULL
)
7265 return process_stop_reply (stop_reply
, status
);
7267 /* Still no event. If we're just polling for an event, then
7268 return to the event loop. */
7269 if (options
& TARGET_WNOHANG
)
7271 status
->kind
= TARGET_WAITKIND_IGNORE
;
7272 return minus_one_ptid
;
7275 /* Otherwise do a blocking wait. */
7276 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7277 1 /* forever */, &is_notif
);
7281 /* Wait until the remote machine stops, then return, storing status in
7282 STATUS just as `wait' would. */
7285 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7287 struct remote_state
*rs
= get_remote_state ();
7288 ptid_t event_ptid
= null_ptid
;
7290 struct stop_reply
*stop_reply
;
7294 status
->kind
= TARGET_WAITKIND_IGNORE
;
7295 status
->value
.integer
= 0;
7297 stop_reply
= queued_stop_reply (ptid
);
7298 if (stop_reply
!= NULL
)
7299 return process_stop_reply (stop_reply
, status
);
7301 if (rs
->cached_wait_status
)
7302 /* Use the cached wait status, but only once. */
7303 rs
->cached_wait_status
= 0;
7308 int forever
= ((options
& TARGET_WNOHANG
) == 0
7309 && wait_forever_enabled_p
);
7311 if (!rs
->waiting_for_stop_reply
)
7313 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7314 return minus_one_ptid
;
7317 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7318 _never_ wait for ever -> test on target_is_async_p().
7319 However, before we do that we need to ensure that the caller
7320 knows how to take the target into/out of async mode. */
7321 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7322 forever
, &is_notif
);
7324 /* GDB gets a notification. Return to core as this event is
7326 if (ret
!= -1 && is_notif
)
7327 return minus_one_ptid
;
7329 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7330 return minus_one_ptid
;
7335 /* Assume that the target has acknowledged Ctrl-C unless we receive
7336 an 'F' or 'O' packet. */
7337 if (buf
[0] != 'F' && buf
[0] != 'O')
7338 rs
->ctrlc_pending_p
= 0;
7342 case 'E': /* Error of some sort. */
7343 /* We're out of sync with the target now. Did it continue or
7344 not? Not is more likely, so report a stop. */
7345 rs
->waiting_for_stop_reply
= 0;
7347 warning (_("Remote failure reply: %s"), buf
);
7348 status
->kind
= TARGET_WAITKIND_STOPPED
;
7349 status
->value
.sig
= GDB_SIGNAL_0
;
7351 case 'F': /* File-I/O request. */
7352 /* GDB may access the inferior memory while handling the File-I/O
7353 request, but we don't want GDB accessing memory while waiting
7354 for a stop reply. See the comments in putpkt_binary. Set
7355 waiting_for_stop_reply to 0 temporarily. */
7356 rs
->waiting_for_stop_reply
= 0;
7357 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7358 rs
->ctrlc_pending_p
= 0;
7359 /* GDB handled the File-I/O request, and the target is running
7360 again. Keep waiting for events. */
7361 rs
->waiting_for_stop_reply
= 1;
7363 case 'N': case 'T': case 'S': case 'X': case 'W':
7365 struct stop_reply
*stop_reply
;
7367 /* There is a stop reply to handle. */
7368 rs
->waiting_for_stop_reply
= 0;
7371 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7374 event_ptid
= process_stop_reply (stop_reply
, status
);
7377 case 'O': /* Console output. */
7378 remote_console_output (buf
+ 1);
7381 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7383 /* Zero length reply means that we tried 'S' or 'C' and the
7384 remote system doesn't support it. */
7385 target_terminal::ours_for_output ();
7387 ("Can't send signals to this remote system. %s not sent.\n",
7388 gdb_signal_to_name (rs
->last_sent_signal
));
7389 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7390 target_terminal::inferior ();
7392 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7396 /* else fallthrough */
7398 warning (_("Invalid remote reply: %s"), buf
);
7402 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7403 return minus_one_ptid
;
7404 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7406 /* Nothing interesting happened. If we're doing a non-blocking
7407 poll, we're done. Otherwise, go back to waiting. */
7408 if (options
& TARGET_WNOHANG
)
7409 return minus_one_ptid
;
7413 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7414 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7416 if (!ptid_equal (event_ptid
, null_ptid
))
7417 record_currthread (rs
, event_ptid
);
7419 event_ptid
= inferior_ptid
;
7422 /* A process exit. Invalidate our notion of current thread. */
7423 record_currthread (rs
, minus_one_ptid
);
7428 /* Wait until the remote machine stops, then return, storing status in
7429 STATUS just as `wait' would. */
7432 remote_wait (struct target_ops
*ops
,
7433 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7437 if (target_is_non_stop_p ())
7438 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7440 event_ptid
= remote_wait_as (ptid
, status
, options
);
7442 if (target_is_async_p ())
7444 /* If there are are events left in the queue tell the event loop
7446 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7447 mark_async_event_handler (remote_async_inferior_event_token
);
7453 /* Fetch a single register using a 'p' packet. */
7456 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7458 struct gdbarch
*gdbarch
= regcache
->arch ();
7459 struct remote_state
*rs
= get_remote_state ();
7461 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7464 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7467 if (reg
->pnum
== -1)
7472 p
+= hexnumstr (p
, reg
->pnum
);
7475 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7479 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7483 case PACKET_UNKNOWN
:
7486 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7487 gdbarch_register_name (regcache
->arch (),
7492 /* If this register is unfetchable, tell the regcache. */
7495 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7499 /* Otherwise, parse and supply the value. */
7505 error (_("fetch_register_using_p: early buf termination"));
7507 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7510 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7514 /* Fetch the registers included in the target's 'g' packet. */
7517 send_g_packet (void)
7519 struct remote_state
*rs
= get_remote_state ();
7522 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7523 remote_send (&rs
->buf
, &rs
->buf_size
);
7525 /* We can get out of synch in various cases. If the first character
7526 in the buffer is not a hex character, assume that has happened
7527 and try to fetch another packet to read. */
7528 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7529 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7530 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7531 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7534 fprintf_unfiltered (gdb_stdlog
,
7535 "Bad register packet; fetching a new packet\n");
7536 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7539 buf_len
= strlen (rs
->buf
);
7541 /* Sanity check the received packet. */
7542 if (buf_len
% 2 != 0)
7543 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7549 process_g_packet (struct regcache
*regcache
)
7551 struct gdbarch
*gdbarch
= regcache
->arch ();
7552 struct remote_state
*rs
= get_remote_state ();
7553 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7558 buf_len
= strlen (rs
->buf
);
7560 /* Further sanity checks, with knowledge of the architecture. */
7561 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7562 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7563 "bytes): %s"), rsa
->sizeof_g_packet
, buf_len
/ 2, rs
->buf
);
7565 /* Save the size of the packet sent to us by the target. It is used
7566 as a heuristic when determining the max size of packets that the
7567 target can safely receive. */
7568 if (rsa
->actual_register_packet_size
== 0)
7569 rsa
->actual_register_packet_size
= buf_len
;
7571 /* If this is smaller than we guessed the 'g' packet would be,
7572 update our records. A 'g' reply that doesn't include a register's
7573 value implies either that the register is not available, or that
7574 the 'p' packet must be used. */
7575 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7577 long sizeof_g_packet
= buf_len
/ 2;
7579 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7581 long offset
= rsa
->regs
[i
].offset
;
7582 long reg_size
= register_size (gdbarch
, i
);
7584 if (rsa
->regs
[i
].pnum
== -1)
7587 if (offset
>= sizeof_g_packet
)
7588 rsa
->regs
[i
].in_g_packet
= 0;
7589 else if (offset
+ reg_size
> sizeof_g_packet
)
7590 error (_("Truncated register %d in remote 'g' packet"), i
);
7592 rsa
->regs
[i
].in_g_packet
= 1;
7595 /* Looks valid enough, we can assume this is the correct length
7596 for a 'g' packet. It's important not to adjust
7597 rsa->sizeof_g_packet if we have truncated registers otherwise
7598 this "if" won't be run the next time the method is called
7599 with a packet of the same size and one of the internal errors
7600 below will trigger instead. */
7601 rsa
->sizeof_g_packet
= sizeof_g_packet
;
7604 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7606 /* Unimplemented registers read as all bits zero. */
7607 memset (regs
, 0, rsa
->sizeof_g_packet
);
7609 /* Reply describes registers byte by byte, each byte encoded as two
7610 hex characters. Suck them all up, then supply them to the
7611 register cacheing/storage mechanism. */
7614 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7616 if (p
[0] == 0 || p
[1] == 0)
7617 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7618 internal_error (__FILE__
, __LINE__
,
7619 _("unexpected end of 'g' packet reply"));
7621 if (p
[0] == 'x' && p
[1] == 'x')
7622 regs
[i
] = 0; /* 'x' */
7624 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7628 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7630 struct packet_reg
*r
= &rsa
->regs
[i
];
7631 long reg_size
= register_size (gdbarch
, i
);
7635 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
7636 /* This shouldn't happen - we adjusted in_g_packet above. */
7637 internal_error (__FILE__
, __LINE__
,
7638 _("unexpected end of 'g' packet reply"));
7639 else if (rs
->buf
[r
->offset
* 2] == 'x')
7641 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7642 /* The register isn't available, mark it as such (at
7643 the same time setting the value to zero). */
7644 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7647 regcache_raw_supply (regcache
, r
->regnum
,
7654 fetch_registers_using_g (struct regcache
*regcache
)
7657 process_g_packet (regcache
);
7660 /* Make the remote selected traceframe match GDB's selected
7664 set_remote_traceframe (void)
7667 struct remote_state
*rs
= get_remote_state ();
7669 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7672 /* Avoid recursion, remote_trace_find calls us again. */
7673 rs
->remote_traceframe_number
= get_traceframe_number ();
7675 newnum
= target_trace_find (tfind_number
,
7676 get_traceframe_number (), 0, 0, NULL
);
7678 /* Should not happen. If it does, all bets are off. */
7679 if (newnum
!= get_traceframe_number ())
7680 warning (_("could not set remote traceframe"));
7684 remote_fetch_registers (struct target_ops
*ops
,
7685 struct regcache
*regcache
, int regnum
)
7687 struct gdbarch
*gdbarch
= regcache
->arch ();
7688 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7691 set_remote_traceframe ();
7692 set_general_thread (regcache_get_ptid (regcache
));
7696 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7698 gdb_assert (reg
!= NULL
);
7700 /* If this register might be in the 'g' packet, try that first -
7701 we are likely to read more than one register. If this is the
7702 first 'g' packet, we might be overly optimistic about its
7703 contents, so fall back to 'p'. */
7704 if (reg
->in_g_packet
)
7706 fetch_registers_using_g (regcache
);
7707 if (reg
->in_g_packet
)
7711 if (fetch_register_using_p (regcache
, reg
))
7714 /* This register is not available. */
7715 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7720 fetch_registers_using_g (regcache
);
7722 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7723 if (!rsa
->regs
[i
].in_g_packet
)
7724 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7726 /* This register is not available. */
7727 regcache_raw_supply (regcache
, i
, NULL
);
7731 /* Prepare to store registers. Since we may send them all (using a
7732 'G' request), we have to read out the ones we don't want to change
7736 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7738 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7741 /* Make sure the entire registers array is valid. */
7742 switch (packet_support (PACKET_P
))
7744 case PACKET_DISABLE
:
7745 case PACKET_SUPPORT_UNKNOWN
:
7746 /* Make sure all the necessary registers are cached. */
7747 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7748 if (rsa
->regs
[i
].in_g_packet
)
7749 regcache_raw_update (regcache
, rsa
->regs
[i
].regnum
);
7756 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7757 packet was not recognized. */
7760 store_register_using_P (const struct regcache
*regcache
,
7761 struct packet_reg
*reg
)
7763 struct gdbarch
*gdbarch
= regcache
->arch ();
7764 struct remote_state
*rs
= get_remote_state ();
7765 /* Try storing a single register. */
7766 char *buf
= rs
->buf
;
7767 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7770 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7773 if (reg
->pnum
== -1)
7776 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7777 p
= buf
+ strlen (buf
);
7778 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7779 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7781 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7783 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7788 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7789 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7790 case PACKET_UNKNOWN
:
7793 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7797 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7798 contents of the register cache buffer. FIXME: ignores errors. */
7801 store_registers_using_G (const struct regcache
*regcache
)
7803 struct remote_state
*rs
= get_remote_state ();
7804 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7808 /* Extract all the registers in the regcache copying them into a
7813 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7814 memset (regs
, 0, rsa
->sizeof_g_packet
);
7815 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7817 struct packet_reg
*r
= &rsa
->regs
[i
];
7820 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7824 /* Command describes registers byte by byte,
7825 each byte encoded as two hex characters. */
7828 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7830 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7831 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7832 error (_("Could not write registers; remote failure reply '%s'"),
7836 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7837 of the register cache buffer. FIXME: ignores errors. */
7840 remote_store_registers (struct target_ops
*ops
,
7841 struct regcache
*regcache
, int regnum
)
7843 struct gdbarch
*gdbarch
= regcache
->arch ();
7844 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7847 set_remote_traceframe ();
7848 set_general_thread (regcache_get_ptid (regcache
));
7852 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7854 gdb_assert (reg
!= NULL
);
7856 /* Always prefer to store registers using the 'P' packet if
7857 possible; we often change only a small number of registers.
7858 Sometimes we change a larger number; we'd need help from a
7859 higher layer to know to use 'G'. */
7860 if (store_register_using_P (regcache
, reg
))
7863 /* For now, don't complain if we have no way to write the
7864 register. GDB loses track of unavailable registers too
7865 easily. Some day, this may be an error. We don't have
7866 any way to read the register, either... */
7867 if (!reg
->in_g_packet
)
7870 store_registers_using_G (regcache
);
7874 store_registers_using_G (regcache
);
7876 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7877 if (!rsa
->regs
[i
].in_g_packet
)
7878 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7879 /* See above for why we do not issue an error here. */
7884 /* Return the number of hex digits in num. */
7887 hexnumlen (ULONGEST num
)
7891 for (i
= 0; num
!= 0; i
++)
7894 return std::max (i
, 1);
7897 /* Set BUF to the minimum number of hex digits representing NUM. */
7900 hexnumstr (char *buf
, ULONGEST num
)
7902 int len
= hexnumlen (num
);
7904 return hexnumnstr (buf
, num
, len
);
7908 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7911 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7917 for (i
= width
- 1; i
>= 0; i
--)
7919 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7926 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7929 remote_address_masked (CORE_ADDR addr
)
7931 unsigned int address_size
= remote_address_size
;
7933 /* If "remoteaddresssize" was not set, default to target address size. */
7935 address_size
= gdbarch_addr_bit (target_gdbarch ());
7937 if (address_size
> 0
7938 && address_size
< (sizeof (ULONGEST
) * 8))
7940 /* Only create a mask when that mask can safely be constructed
7941 in a ULONGEST variable. */
7944 mask
= (mask
<< address_size
) - 1;
7950 /* Determine whether the remote target supports binary downloading.
7951 This is accomplished by sending a no-op memory write of zero length
7952 to the target at the specified address. It does not suffice to send
7953 the whole packet, since many stubs strip the eighth bit and
7954 subsequently compute a wrong checksum, which causes real havoc with
7957 NOTE: This can still lose if the serial line is not eight-bit
7958 clean. In cases like this, the user should clear "remote
7962 check_binary_download (CORE_ADDR addr
)
7964 struct remote_state
*rs
= get_remote_state ();
7966 switch (packet_support (PACKET_X
))
7968 case PACKET_DISABLE
:
7972 case PACKET_SUPPORT_UNKNOWN
:
7978 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7980 p
+= hexnumstr (p
, (ULONGEST
) 0);
7984 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7985 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7987 if (rs
->buf
[0] == '\0')
7990 fprintf_unfiltered (gdb_stdlog
,
7991 "binary downloading NOT "
7992 "supported by target\n");
7993 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
7998 fprintf_unfiltered (gdb_stdlog
,
7999 "binary downloading supported by target\n");
8000 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8007 /* Helper function to resize the payload in order to try to get a good
8008 alignment. We try to write an amount of data such that the next write will
8009 start on an address aligned on REMOTE_ALIGN_WRITES. */
8012 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8014 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8017 /* Write memory data directly to the remote machine.
8018 This does not inform the data cache; the data cache uses this.
8019 HEADER is the starting part of the packet.
8020 MEMADDR is the address in the remote memory space.
8021 MYADDR is the address of the buffer in our space.
8022 LEN_UNITS is the number of addressable units to write.
8023 UNIT_SIZE is the length in bytes of an addressable unit.
8024 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8025 should send data as binary ('X'), or hex-encoded ('M').
8027 The function creates packet of the form
8028 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8030 where encoding of <DATA> is terminated by PACKET_FORMAT.
8032 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8035 Return the transferred status, error or OK (an
8036 'enum target_xfer_status' value). Save the number of addressable units
8037 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8039 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8040 exchange between gdb and the stub could look like (?? in place of the
8046 -> $M1000,3:eeeeffffeeee#??
8050 <- eeeeffffeeeedddd */
8052 static enum target_xfer_status
8053 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8054 const gdb_byte
*myaddr
, ULONGEST len_units
,
8055 int unit_size
, ULONGEST
*xfered_len_units
,
8056 char packet_format
, int use_length
)
8058 struct remote_state
*rs
= get_remote_state ();
8064 int payload_capacity_bytes
;
8065 int payload_length_bytes
;
8067 if (packet_format
!= 'X' && packet_format
!= 'M')
8068 internal_error (__FILE__
, __LINE__
,
8069 _("remote_write_bytes_aux: bad packet format"));
8072 return TARGET_XFER_EOF
;
8074 payload_capacity_bytes
= get_memory_write_packet_size ();
8076 /* The packet buffer will be large enough for the payload;
8077 get_memory_packet_size ensures this. */
8080 /* Compute the size of the actual payload by subtracting out the
8081 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8083 payload_capacity_bytes
-= strlen ("$,:#NN");
8085 /* The comma won't be used. */
8086 payload_capacity_bytes
+= 1;
8087 payload_capacity_bytes
-= strlen (header
);
8088 payload_capacity_bytes
-= hexnumlen (memaddr
);
8090 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8092 strcat (rs
->buf
, header
);
8093 p
= rs
->buf
+ strlen (header
);
8095 /* Compute a best guess of the number of bytes actually transfered. */
8096 if (packet_format
== 'X')
8098 /* Best guess at number of bytes that will fit. */
8099 todo_units
= std::min (len_units
,
8100 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8102 payload_capacity_bytes
-= hexnumlen (todo_units
);
8103 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8107 /* Number of bytes that will fit. */
8109 = std::min (len_units
,
8110 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8112 payload_capacity_bytes
-= hexnumlen (todo_units
);
8113 todo_units
= std::min (todo_units
,
8114 (payload_capacity_bytes
/ unit_size
) / 2);
8117 if (todo_units
<= 0)
8118 internal_error (__FILE__
, __LINE__
,
8119 _("minimum packet size too small to write data"));
8121 /* If we already need another packet, then try to align the end
8122 of this packet to a useful boundary. */
8123 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8124 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8126 /* Append "<memaddr>". */
8127 memaddr
= remote_address_masked (memaddr
);
8128 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8135 /* Append the length and retain its location and size. It may need to be
8136 adjusted once the packet body has been created. */
8138 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8146 /* Append the packet body. */
8147 if (packet_format
== 'X')
8149 /* Binary mode. Send target system values byte by byte, in
8150 increasing byte addresses. Only escape certain critical
8152 payload_length_bytes
=
8153 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8154 &units_written
, payload_capacity_bytes
);
8156 /* If not all TODO units fit, then we'll need another packet. Make
8157 a second try to keep the end of the packet aligned. Don't do
8158 this if the packet is tiny. */
8159 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8163 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8165 if (new_todo_units
!= units_written
)
8166 payload_length_bytes
=
8167 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8168 (gdb_byte
*) p
, &units_written
,
8169 payload_capacity_bytes
);
8172 p
+= payload_length_bytes
;
8173 if (use_length
&& units_written
< todo_units
)
8175 /* Escape chars have filled up the buffer prematurely,
8176 and we have actually sent fewer units than planned.
8177 Fix-up the length field of the packet. Use the same
8178 number of characters as before. */
8179 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8181 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8186 /* Normal mode: Send target system values byte by byte, in
8187 increasing byte addresses. Each byte is encoded as a two hex
8189 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8190 units_written
= todo_units
;
8193 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8194 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8196 if (rs
->buf
[0] == 'E')
8197 return TARGET_XFER_E_IO
;
8199 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8200 send fewer units than we'd planned. */
8201 *xfered_len_units
= (ULONGEST
) units_written
;
8202 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8205 /* Write memory data directly to the remote machine.
8206 This does not inform the data cache; the data cache uses this.
8207 MEMADDR is the address in the remote memory space.
8208 MYADDR is the address of the buffer in our space.
8209 LEN is the number of bytes.
8211 Return the transferred status, error or OK (an
8212 'enum target_xfer_status' value). Save the number of bytes
8213 transferred in *XFERED_LEN. Only transfer a single packet. */
8215 static enum target_xfer_status
8216 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
8217 int unit_size
, ULONGEST
*xfered_len
)
8219 const char *packet_format
= NULL
;
8221 /* Check whether the target supports binary download. */
8222 check_binary_download (memaddr
);
8224 switch (packet_support (PACKET_X
))
8227 packet_format
= "X";
8229 case PACKET_DISABLE
:
8230 packet_format
= "M";
8232 case PACKET_SUPPORT_UNKNOWN
:
8233 internal_error (__FILE__
, __LINE__
,
8234 _("remote_write_bytes: bad internal state"));
8236 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8239 return remote_write_bytes_aux (packet_format
,
8240 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8241 packet_format
[0], 1);
8244 /* Read memory data directly from the remote machine.
8245 This does not use the data cache; the data cache uses this.
8246 MEMADDR is the address in the remote memory space.
8247 MYADDR is the address of the buffer in our space.
8248 LEN_UNITS is the number of addressable memory units to read..
8249 UNIT_SIZE is the length in bytes of an addressable unit.
8251 Return the transferred status, error or OK (an
8252 'enum target_xfer_status' value). Save the number of bytes
8253 transferred in *XFERED_LEN_UNITS.
8255 See the comment of remote_write_bytes_aux for an example of
8256 memory read/write exchange between gdb and the stub. */
8258 static enum target_xfer_status
8259 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
8260 int unit_size
, ULONGEST
*xfered_len_units
)
8262 struct remote_state
*rs
= get_remote_state ();
8263 int buf_size_bytes
; /* Max size of packet output buffer. */
8268 buf_size_bytes
= get_memory_read_packet_size ();
8269 /* The packet buffer will be large enough for the payload;
8270 get_memory_packet_size ensures this. */
8272 /* Number of units that will fit. */
8273 todo_units
= std::min (len_units
,
8274 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8276 /* Construct "m"<memaddr>","<len>". */
8277 memaddr
= remote_address_masked (memaddr
);
8280 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8282 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8285 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8286 if (rs
->buf
[0] == 'E'
8287 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8288 && rs
->buf
[3] == '\0')
8289 return TARGET_XFER_E_IO
;
8290 /* Reply describes memory byte by byte, each byte encoded as two hex
8293 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8294 /* Return what we have. Let higher layers handle partial reads. */
8295 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8296 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8299 /* Using the set of read-only target sections of remote, read live
8302 For interface/parameters/return description see target.h,
8305 static enum target_xfer_status
8306 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
8307 ULONGEST memaddr
, ULONGEST len
,
8308 int unit_size
, ULONGEST
*xfered_len
)
8310 struct target_section
*secp
;
8311 struct target_section_table
*table
;
8313 secp
= target_section_by_addr (ops
, memaddr
);
8315 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8316 secp
->the_bfd_section
)
8319 struct target_section
*p
;
8320 ULONGEST memend
= memaddr
+ len
;
8322 table
= target_get_section_table (ops
);
8324 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8326 if (memaddr
>= p
->addr
)
8328 if (memend
<= p
->endaddr
)
8330 /* Entire transfer is within this section. */
8331 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8334 else if (memaddr
>= p
->endaddr
)
8336 /* This section ends before the transfer starts. */
8341 /* This section overlaps the transfer. Just do half. */
8342 len
= p
->endaddr
- memaddr
;
8343 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8350 return TARGET_XFER_EOF
;
8353 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8354 first if the requested memory is unavailable in traceframe.
8355 Otherwise, fall back to remote_read_bytes_1. */
8357 static enum target_xfer_status
8358 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
8359 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8360 ULONGEST
*xfered_len
)
8363 return TARGET_XFER_EOF
;
8365 if (get_traceframe_number () != -1)
8367 std::vector
<mem_range
> available
;
8369 /* If we fail to get the set of available memory, then the
8370 target does not support querying traceframe info, and so we
8371 attempt reading from the traceframe anyway (assuming the
8372 target implements the old QTro packet then). */
8373 if (traceframe_available_memory (&available
, memaddr
, len
))
8375 if (available
.empty () || available
[0].start
!= memaddr
)
8377 enum target_xfer_status res
;
8379 /* Don't read into the traceframe's available
8381 if (!available
.empty ())
8383 LONGEST oldlen
= len
;
8385 len
= available
[0].start
- memaddr
;
8386 gdb_assert (len
<= oldlen
);
8389 /* This goes through the topmost target again. */
8390 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8391 len
, unit_size
, xfered_len
);
8392 if (res
== TARGET_XFER_OK
)
8393 return TARGET_XFER_OK
;
8396 /* No use trying further, we know some memory starting
8397 at MEMADDR isn't available. */
8399 return (*xfered_len
!= 0) ?
8400 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8404 /* Don't try to read more than how much is available, in
8405 case the target implements the deprecated QTro packet to
8406 cater for older GDBs (the target's knowledge of read-only
8407 sections may be outdated by now). */
8408 len
= available
[0].length
;
8412 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8417 /* Sends a packet with content determined by the printf format string
8418 FORMAT and the remaining arguments, then gets the reply. Returns
8419 whether the packet was a success, a failure, or unknown. */
8421 static enum packet_result
remote_send_printf (const char *format
, ...)
8422 ATTRIBUTE_PRINTF (1, 2);
8424 static enum packet_result
8425 remote_send_printf (const char *format
, ...)
8427 struct remote_state
*rs
= get_remote_state ();
8428 int max_size
= get_remote_packet_size ();
8431 va_start (ap
, format
);
8434 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8435 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8437 if (putpkt (rs
->buf
) < 0)
8438 error (_("Communication problem with target."));
8441 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8443 return packet_check_result (rs
->buf
);
8446 /* Flash writing can take quite some time. We'll set
8447 effectively infinite timeout for flash operations.
8448 In future, we'll need to decide on a better approach. */
8449 static const int remote_flash_timeout
= 1000;
8452 remote_flash_erase (struct target_ops
*ops
,
8453 ULONGEST address
, LONGEST length
)
8455 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8456 enum packet_result ret
;
8457 scoped_restore restore_timeout
8458 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8460 ret
= remote_send_printf ("vFlashErase:%s,%s",
8461 phex (address
, addr_size
),
8465 case PACKET_UNKNOWN
:
8466 error (_("Remote target does not support flash erase"));
8468 error (_("Error erasing flash with vFlashErase packet"));
8474 static enum target_xfer_status
8475 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8476 ULONGEST length
, ULONGEST
*xfered_len
,
8477 const gdb_byte
*data
)
8479 scoped_restore restore_timeout
8480 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8481 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8486 remote_flash_done (struct target_ops
*ops
)
8490 scoped_restore restore_timeout
8491 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8493 ret
= remote_send_printf ("vFlashDone");
8497 case PACKET_UNKNOWN
:
8498 error (_("Remote target does not support vFlashDone"));
8500 error (_("Error finishing flash operation"));
8507 remote_files_info (struct target_ops
*ignore
)
8509 puts_filtered ("Debugging a target over a serial line.\n");
8512 /* Stuff for dealing with the packets which are part of this protocol.
8513 See comment at top of file for details. */
8515 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8516 error to higher layers. Called when a serial error is detected.
8517 The exception message is STRING, followed by a colon and a blank,
8518 the system error message for errno at function entry and final dot
8519 for output compatibility with throw_perror_with_name. */
8522 unpush_and_perror (const char *string
)
8524 int saved_errno
= errno
;
8526 remote_unpush_target ();
8527 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8528 safe_strerror (saved_errno
));
8531 /* Read a single character from the remote end. The current quit
8532 handler is overridden to avoid quitting in the middle of packet
8533 sequence, as that would break communication with the remote server.
8534 See remote_serial_quit_handler for more detail. */
8537 readchar (int timeout
)
8540 struct remote_state
*rs
= get_remote_state ();
8543 scoped_restore restore_quit
8544 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8546 rs
->got_ctrlc_during_io
= 0;
8548 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8550 if (rs
->got_ctrlc_during_io
)
8557 switch ((enum serial_rc
) ch
)
8560 remote_unpush_target ();
8561 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8564 unpush_and_perror (_("Remote communication error. "
8565 "Target disconnected."));
8567 case SERIAL_TIMEOUT
:
8573 /* Wrapper for serial_write that closes the target and throws if
8574 writing fails. The current quit handler is overridden to avoid
8575 quitting in the middle of packet sequence, as that would break
8576 communication with the remote server. See
8577 remote_serial_quit_handler for more detail. */
8580 remote_serial_write (const char *str
, int len
)
8582 struct remote_state
*rs
= get_remote_state ();
8584 scoped_restore restore_quit
8585 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8587 rs
->got_ctrlc_during_io
= 0;
8589 if (serial_write (rs
->remote_desc
, str
, len
))
8591 unpush_and_perror (_("Remote communication error. "
8592 "Target disconnected."));
8595 if (rs
->got_ctrlc_during_io
)
8599 /* Send the command in *BUF to the remote machine, and read the reply
8600 into *BUF. Report an error if we get an error reply. Resize
8601 *BUF using xrealloc if necessary to hold the result, and update
8605 remote_send (char **buf
,
8609 getpkt (buf
, sizeof_buf
, 0);
8611 if ((*buf
)[0] == 'E')
8612 error (_("Remote failure reply: %s"), *buf
);
8615 /* Return a string representing an escaped version of BUF, of len N.
8616 E.g. \n is converted to \\n, \t to \\t, etc. */
8619 escape_buffer (const char *buf
, int n
)
8623 stb
.putstrn (buf
, n
, '\\');
8624 return std::move (stb
.string ());
8627 /* Display a null-terminated packet on stdout, for debugging, using C
8631 print_packet (const char *buf
)
8633 puts_filtered ("\"");
8634 fputstr_filtered (buf
, '"', gdb_stdout
);
8635 puts_filtered ("\"");
8639 putpkt (const char *buf
)
8641 return putpkt_binary (buf
, strlen (buf
));
8644 /* Send a packet to the remote machine, with error checking. The data
8645 of the packet is in BUF. The string in BUF can be at most
8646 get_remote_packet_size () - 5 to account for the $, # and checksum,
8647 and for a possible /0 if we are debugging (remote_debug) and want
8648 to print the sent packet as a string. */
8651 putpkt_binary (const char *buf
, int cnt
)
8653 struct remote_state
*rs
= get_remote_state ();
8655 unsigned char csum
= 0;
8656 gdb::def_vector
<char> data (cnt
+ 6);
8657 char *buf2
= data
.data ();
8663 /* Catch cases like trying to read memory or listing threads while
8664 we're waiting for a stop reply. The remote server wouldn't be
8665 ready to handle this request, so we'd hang and timeout. We don't
8666 have to worry about this in synchronous mode, because in that
8667 case it's not possible to issue a command while the target is
8668 running. This is not a problem in non-stop mode, because in that
8669 case, the stub is always ready to process serial input. */
8670 if (!target_is_non_stop_p ()
8671 && target_is_async_p ()
8672 && rs
->waiting_for_stop_reply
)
8674 error (_("Cannot execute this command while the target is running.\n"
8675 "Use the \"interrupt\" command to stop the target\n"
8676 "and then try again."));
8679 /* We're sending out a new packet. Make sure we don't look at a
8680 stale cached response. */
8681 rs
->cached_wait_status
= 0;
8683 /* Copy the packet into buffer BUF2, encapsulating it
8684 and giving it a checksum. */
8689 for (i
= 0; i
< cnt
; i
++)
8695 *p
++ = tohex ((csum
>> 4) & 0xf);
8696 *p
++ = tohex (csum
& 0xf);
8698 /* Send it over and over until we get a positive ack. */
8702 int started_error_output
= 0;
8708 int len
= (int) (p
- buf2
);
8711 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
8713 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
8715 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
8717 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
8718 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
8721 fprintf_unfiltered (gdb_stdlog
, "...");
8723 gdb_flush (gdb_stdlog
);
8725 remote_serial_write (buf2
, p
- buf2
);
8727 /* If this is a no acks version of the remote protocol, send the
8728 packet and move on. */
8732 /* Read until either a timeout occurs (-2) or '+' is read.
8733 Handle any notification that arrives in the mean time. */
8736 ch
= readchar (remote_timeout
);
8744 case SERIAL_TIMEOUT
:
8747 if (started_error_output
)
8749 putchar_unfiltered ('\n');
8750 started_error_output
= 0;
8759 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8763 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8765 case SERIAL_TIMEOUT
:
8769 break; /* Retransmit buffer. */
8773 fprintf_unfiltered (gdb_stdlog
,
8774 "Packet instead of Ack, ignoring it\n");
8775 /* It's probably an old response sent because an ACK
8776 was lost. Gobble up the packet and ack it so it
8777 doesn't get retransmitted when we resend this
8780 remote_serial_write ("+", 1);
8781 continue; /* Now, go look for +. */
8788 /* If we got a notification, handle it, and go back to looking
8790 /* We've found the start of a notification. Now
8791 collect the data. */
8792 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8797 std::string str
= escape_buffer (rs
->buf
, val
);
8799 fprintf_unfiltered (gdb_stdlog
,
8800 " Notification received: %s\n",
8803 handle_notification (rs
->notif_state
, rs
->buf
);
8804 /* We're in sync now, rewait for the ack. */
8811 if (!started_error_output
)
8813 started_error_output
= 1;
8814 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8816 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8817 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8826 if (!started_error_output
)
8828 started_error_output
= 1;
8829 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8831 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8835 break; /* Here to retransmit. */
8839 /* This is wrong. If doing a long backtrace, the user should be
8840 able to get out next time we call QUIT, without anything as
8841 violent as interrupt_query. If we want to provide a way out of
8842 here without getting to the next QUIT, it should be based on
8843 hitting ^C twice as in remote_wait. */
8855 /* Come here after finding the start of a frame when we expected an
8856 ack. Do our best to discard the rest of this packet. */
8865 c
= readchar (remote_timeout
);
8868 case SERIAL_TIMEOUT
:
8869 /* Nothing we can do. */
8872 /* Discard the two bytes of checksum and stop. */
8873 c
= readchar (remote_timeout
);
8875 c
= readchar (remote_timeout
);
8878 case '*': /* Run length encoding. */
8879 /* Discard the repeat count. */
8880 c
= readchar (remote_timeout
);
8885 /* A regular character. */
8891 /* Come here after finding the start of the frame. Collect the rest
8892 into *BUF, verifying the checksum, length, and handling run-length
8893 compression. NUL terminate the buffer. If there is not enough room,
8894 expand *BUF using xrealloc.
8896 Returns -1 on error, number of characters in buffer (ignoring the
8897 trailing NULL) on success. (could be extended to return one of the
8898 SERIAL status indications). */
8901 read_frame (char **buf_p
,
8908 struct remote_state
*rs
= get_remote_state ();
8915 c
= readchar (remote_timeout
);
8918 case SERIAL_TIMEOUT
:
8920 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8924 fputs_filtered ("Saw new packet start in middle of old one\n",
8926 return -1; /* Start a new packet, count retries. */
8929 unsigned char pktcsum
;
8935 check_0
= readchar (remote_timeout
);
8937 check_1
= readchar (remote_timeout
);
8939 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
8942 fputs_filtered ("Timeout in checksum, retrying\n",
8946 else if (check_0
< 0 || check_1
< 0)
8949 fputs_filtered ("Communication error in checksum\n",
8954 /* Don't recompute the checksum; with no ack packets we
8955 don't have any way to indicate a packet retransmission
8960 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
8961 if (csum
== pktcsum
)
8966 std::string str
= escape_buffer (buf
, bc
);
8968 fprintf_unfiltered (gdb_stdlog
,
8969 "Bad checksum, sentsum=0x%x, "
8970 "csum=0x%x, buf=%s\n",
8971 pktcsum
, csum
, str
.c_str ());
8973 /* Number of characters in buffer ignoring trailing
8977 case '*': /* Run length encoding. */
8982 c
= readchar (remote_timeout
);
8984 repeat
= c
- ' ' + 3; /* Compute repeat count. */
8986 /* The character before ``*'' is repeated. */
8988 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
8990 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
8992 /* Make some more room in the buffer. */
8993 *sizeof_buf
+= repeat
;
8994 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
8998 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9004 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9008 if (bc
>= *sizeof_buf
- 1)
9010 /* Make some more room in the buffer. */
9012 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9023 /* Read a packet from the remote machine, with error checking, and
9024 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9025 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9026 rather than timing out; this is used (in synchronous mode) to wait
9027 for a target that is is executing user code to stop. */
9028 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9029 don't have to change all the calls to getpkt to deal with the
9030 return value, because at the moment I don't know what the right
9031 thing to do it for those. */
9037 getpkt_sane (buf
, sizeof_buf
, forever
);
9041 /* Read a packet from the remote machine, with error checking, and
9042 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9043 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9044 rather than timing out; this is used (in synchronous mode) to wait
9045 for a target that is is executing user code to stop. If FOREVER ==
9046 0, this function is allowed to time out gracefully and return an
9047 indication of this to the caller. Otherwise return the number of
9048 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9049 enough reason to return to the caller. *IS_NOTIF is an output
9050 boolean that indicates whether *BUF holds a notification or not
9051 (a regular packet). */
9054 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
9055 int expecting_notif
, int *is_notif
)
9057 struct remote_state
*rs
= get_remote_state ();
9063 /* We're reading a new response. Make sure we don't look at a
9064 previously cached response. */
9065 rs
->cached_wait_status
= 0;
9067 strcpy (*buf
, "timeout");
9070 timeout
= watchdog
> 0 ? watchdog
: -1;
9071 else if (expecting_notif
)
9072 timeout
= 0; /* There should already be a char in the buffer. If
9075 timeout
= remote_timeout
;
9079 /* Process any number of notifications, and then return when
9083 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9085 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9087 /* This can loop forever if the remote side sends us
9088 characters continuously, but if it pauses, we'll get
9089 SERIAL_TIMEOUT from readchar because of timeout. Then
9090 we'll count that as a retry.
9092 Note that even when forever is set, we will only wait
9093 forever prior to the start of a packet. After that, we
9094 expect characters to arrive at a brisk pace. They should
9095 show up within remote_timeout intervals. */
9097 c
= readchar (timeout
);
9098 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9100 if (c
== SERIAL_TIMEOUT
)
9102 if (expecting_notif
)
9103 return -1; /* Don't complain, it's normal to not get
9104 anything in this case. */
9106 if (forever
) /* Watchdog went off? Kill the target. */
9108 remote_unpush_target ();
9109 throw_error (TARGET_CLOSE_ERROR
,
9110 _("Watchdog timeout has expired. "
9111 "Target detached."));
9114 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9118 /* We've found the start of a packet or notification.
9119 Now collect the data. */
9120 val
= read_frame (buf
, sizeof_buf
);
9125 remote_serial_write ("-", 1);
9128 if (tries
> MAX_TRIES
)
9130 /* We have tried hard enough, and just can't receive the
9131 packet/notification. Give up. */
9132 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9134 /* Skip the ack char if we're in no-ack mode. */
9135 if (!rs
->noack_mode
)
9136 remote_serial_write ("+", 1);
9140 /* If we got an ordinary packet, return that to our caller. */
9146 = escape_buffer (*buf
,
9147 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9149 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9152 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
9154 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
9155 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
9158 fprintf_unfiltered (gdb_stdlog
, "\n");
9161 /* Skip the ack char if we're in no-ack mode. */
9162 if (!rs
->noack_mode
)
9163 remote_serial_write ("+", 1);
9164 if (is_notif
!= NULL
)
9169 /* If we got a notification, handle it, and go back to looking
9173 gdb_assert (c
== '%');
9177 std::string str
= escape_buffer (*buf
, val
);
9179 fprintf_unfiltered (gdb_stdlog
,
9180 " Notification received: %s\n",
9183 if (is_notif
!= NULL
)
9186 handle_notification (rs
->notif_state
, *buf
);
9188 /* Notifications require no acknowledgement. */
9190 if (expecting_notif
)
9197 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9199 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9203 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9206 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9210 /* Check whether EVENT is a fork event for the process specified
9211 by the pid passed in DATA, and if it is, kill the fork child. */
9214 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
9215 QUEUE_ITER (stop_reply_p
) *iter
,
9219 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
9220 int parent_pid
= *(int *) param
->input
;
9222 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
9224 struct remote_state
*rs
= get_remote_state ();
9225 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
9228 res
= remote_vkill (child_pid
, rs
);
9230 error (_("Can't kill fork child process %d"), child_pid
);
9236 /* Kill any new fork children of process PID that haven't been
9237 processed by follow_fork. */
9240 kill_new_fork_children (int pid
, struct remote_state
*rs
)
9242 struct thread_info
*thread
;
9243 struct notif_client
*notif
= ¬if_client_stop
;
9244 struct queue_iter_param param
;
9246 /* Kill the fork child threads of any threads in process PID
9247 that are stopped at a fork event. */
9248 ALL_NON_EXITED_THREADS (thread
)
9250 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9252 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9254 struct remote_state
*rs
= get_remote_state ();
9255 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
9258 res
= remote_vkill (child_pid
, rs
);
9260 error (_("Can't kill fork child process %d"), child_pid
);
9264 /* Check for any pending fork events (not reported or processed yet)
9265 in process PID and kill those fork child threads as well. */
9266 remote_notif_get_pending_events (notif
);
9268 param
.output
= NULL
;
9269 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
9270 kill_child_of_pending_fork
, ¶m
);
9274 /* Target hook to kill the current inferior. */
9277 remote_kill (struct target_ops
*ops
)
9280 int pid
= ptid_get_pid (inferior_ptid
);
9281 struct remote_state
*rs
= get_remote_state ();
9283 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9285 /* If we're stopped while forking and we haven't followed yet,
9286 kill the child task. We need to do this before killing the
9287 parent task because if this is a vfork then the parent will
9289 kill_new_fork_children (pid
, rs
);
9291 res
= remote_vkill (pid
, rs
);
9294 target_mourn_inferior (inferior_ptid
);
9299 /* If we are in 'target remote' mode and we are killing the only
9300 inferior, then we will tell gdbserver to exit and unpush the
9302 if (res
== -1 && !remote_multi_process_p (rs
)
9303 && number_of_live_inferiors () == 1)
9307 /* We've killed the remote end, we get to mourn it. If we are
9308 not in extended mode, mourning the inferior also unpushes
9309 remote_ops from the target stack, which closes the remote
9311 target_mourn_inferior (inferior_ptid
);
9316 error (_("Can't kill process"));
9319 /* Send a kill request to the target using the 'vKill' packet. */
9322 remote_vkill (int pid
, struct remote_state
*rs
)
9324 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9327 /* Tell the remote target to detach. */
9328 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9330 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9332 switch (packet_ok (rs
->buf
,
9333 &remote_protocol_packets
[PACKET_vKill
]))
9339 case PACKET_UNKNOWN
:
9342 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9346 /* Send a kill request to the target using the 'k' packet. */
9349 remote_kill_k (void)
9351 /* Catch errors so the user can quit from gdb even when we
9352 aren't on speaking terms with the remote system. */
9357 CATCH (ex
, RETURN_MASK_ERROR
)
9359 if (ex
.error
== TARGET_CLOSE_ERROR
)
9361 /* If we got an (EOF) error that caused the target
9362 to go away, then we're done, that's what we wanted.
9363 "k" is susceptible to cause a premature EOF, given
9364 that the remote server isn't actually required to
9365 reply to "k", and it can happen that it doesn't
9366 even get to reply ACK to the "k". */
9370 /* Otherwise, something went wrong. We didn't actually kill
9371 the target. Just propagate the exception, and let the
9372 user or higher layers decide what to do. */
9373 throw_exception (ex
);
9379 remote_mourn (struct target_ops
*target
)
9381 struct remote_state
*rs
= get_remote_state ();
9383 /* In 'target remote' mode with one inferior, we close the connection. */
9384 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9386 unpush_target (target
);
9388 /* remote_close takes care of doing most of the clean up. */
9389 generic_mourn_inferior ();
9393 /* In case we got here due to an error, but we're going to stay
9395 rs
->waiting_for_stop_reply
= 0;
9397 /* If the current general thread belonged to the process we just
9398 detached from or has exited, the remote side current general
9399 thread becomes undefined. Considering a case like this:
9401 - We just got here due to a detach.
9402 - The process that we're detaching from happens to immediately
9403 report a global breakpoint being hit in non-stop mode, in the
9404 same thread we had selected before.
9405 - GDB attaches to this process again.
9406 - This event happens to be the next event we handle.
9408 GDB would consider that the current general thread didn't need to
9409 be set on the stub side (with Hg), since for all it knew,
9410 GENERAL_THREAD hadn't changed.
9412 Notice that although in all-stop mode, the remote server always
9413 sets the current thread to the thread reporting the stop event,
9414 that doesn't happen in non-stop mode; in non-stop, the stub *must
9415 not* change the current thread when reporting a breakpoint hit,
9416 due to the decoupling of event reporting and event handling.
9418 To keep things simple, we always invalidate our notion of the
9420 record_currthread (rs
, minus_one_ptid
);
9422 /* Call common code to mark the inferior as not running. */
9423 generic_mourn_inferior ();
9425 if (!have_inferiors ())
9427 if (!remote_multi_process_p (rs
))
9429 /* Check whether the target is running now - some remote stubs
9430 automatically restart after kill. */
9432 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9434 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9436 /* Assume that the target has been restarted. Set
9437 inferior_ptid so that bits of core GDB realizes
9438 there's something here, e.g., so that the user can
9439 say "kill" again. */
9440 inferior_ptid
= magic_null_ptid
;
9447 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9449 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9453 extended_remote_disable_randomization (int val
)
9455 struct remote_state
*rs
= get_remote_state ();
9458 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9461 reply
= remote_get_noisy_reply ();
9463 error (_("Target does not support QDisableRandomization."));
9464 if (strcmp (reply
, "OK") != 0)
9465 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9469 extended_remote_run (const std::string
&args
)
9471 struct remote_state
*rs
= get_remote_state ();
9473 const char *remote_exec_file
= get_remote_exec_file ();
9475 /* If the user has disabled vRun support, or we have detected that
9476 support is not available, do not try it. */
9477 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9480 strcpy (rs
->buf
, "vRun;");
9481 len
= strlen (rs
->buf
);
9483 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9484 error (_("Remote file name too long for run packet"));
9485 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9486 strlen (remote_exec_file
));
9492 gdb_argv
argv (args
.c_str ());
9493 for (i
= 0; argv
[i
] != NULL
; i
++)
9495 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9496 error (_("Argument list too long for run packet"));
9497 rs
->buf
[len
++] = ';';
9498 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9503 rs
->buf
[len
++] = '\0';
9506 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9508 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9511 /* We have a wait response. All is well. */
9513 case PACKET_UNKNOWN
:
9516 if (remote_exec_file
[0] == '\0')
9517 error (_("Running the default executable on the remote target failed; "
9518 "try \"set remote exec-file\"?"));
9520 error (_("Running \"%s\" on the remote target failed"),
9523 gdb_assert_not_reached (_("bad switch"));
9527 /* Helper function to send set/unset environment packets. ACTION is
9528 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9529 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9533 send_environment_packet (struct remote_state
*rs
,
9538 /* Convert the environment variable to an hex string, which
9539 is the best format to be transmitted over the wire. */
9540 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
9543 xsnprintf (rs
->buf
, get_remote_packet_size (),
9544 "%s:%s", packet
, encoded_value
.c_str ());
9547 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9548 if (strcmp (rs
->buf
, "OK") != 0)
9549 warning (_("Unable to %s environment variable '%s' on remote."),
9553 /* Helper function to handle the QEnvironment* packets. */
9556 extended_remote_environment_support (struct remote_state
*rs
)
9558 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
9560 putpkt ("QEnvironmentReset");
9561 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9562 if (strcmp (rs
->buf
, "OK") != 0)
9563 warning (_("Unable to reset environment on remote."));
9566 gdb_environ
*e
= ¤t_inferior ()->environment
;
9568 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
9569 for (const std::string
&el
: e
->user_set_env ())
9570 send_environment_packet (rs
, "set", "QEnvironmentHexEncoded",
9573 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
9574 for (const std::string
&el
: e
->user_unset_env ())
9575 send_environment_packet (rs
, "unset", "QEnvironmentUnset", el
.c_str ());
9578 /* Helper function to set the current working directory for the
9579 inferior in the remote target. */
9582 extended_remote_set_inferior_cwd (struct remote_state
*rs
)
9584 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
9586 const char *inferior_cwd
= get_inferior_cwd ();
9588 if (inferior_cwd
!= NULL
)
9590 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
9591 strlen (inferior_cwd
));
9593 xsnprintf (rs
->buf
, get_remote_packet_size (),
9594 "QSetWorkingDir:%s", hexpath
.c_str ());
9598 /* An empty inferior_cwd means that the user wants us to
9599 reset the remote server's inferior's cwd. */
9600 xsnprintf (rs
->buf
, get_remote_packet_size (),
9605 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9606 if (packet_ok (rs
->buf
,
9607 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
9610 Remote replied unexpectedly while setting the inferior's working\n\
9617 /* In the extended protocol we want to be able to do things like
9618 "run" and have them basically work as expected. So we need
9619 a special create_inferior function. We support changing the
9620 executable file and the command line arguments, but not the
9624 extended_remote_create_inferior (struct target_ops
*ops
,
9625 const char *exec_file
,
9626 const std::string
&args
,
9627 char **env
, int from_tty
)
9631 struct remote_state
*rs
= get_remote_state ();
9632 const char *remote_exec_file
= get_remote_exec_file ();
9634 /* If running asynchronously, register the target file descriptor
9635 with the event loop. */
9636 if (target_can_async_p ())
9639 /* Disable address space randomization if requested (and supported). */
9640 if (extended_remote_supports_disable_randomization (ops
))
9641 extended_remote_disable_randomization (disable_randomization
);
9643 /* If startup-with-shell is on, we inform gdbserver to start the
9644 remote inferior using a shell. */
9645 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
9647 xsnprintf (rs
->buf
, get_remote_packet_size (),
9648 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
9650 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9651 if (strcmp (rs
->buf
, "OK") != 0)
9653 Remote replied unexpectedly while setting startup-with-shell: %s"),
9657 extended_remote_environment_support (rs
);
9659 extended_remote_set_inferior_cwd (rs
);
9661 /* Now restart the remote server. */
9662 run_worked
= extended_remote_run (args
) != -1;
9665 /* vRun was not supported. Fail if we need it to do what the
9667 if (remote_exec_file
[0])
9668 error (_("Remote target does not support \"set remote exec-file\""));
9670 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9672 /* Fall back to "R". */
9673 extended_remote_restart ();
9676 if (!have_inferiors ())
9678 /* Clean up from the last time we ran, before we mark the target
9679 running again. This will mark breakpoints uninserted, and
9680 get_offsets may insert breakpoints. */
9681 init_thread_list ();
9682 init_wait_for_inferior ();
9685 /* vRun's success return is a stop reply. */
9686 stop_reply
= run_worked
? rs
->buf
: NULL
;
9687 add_current_inferior_and_thread (stop_reply
);
9689 /* Get updated offsets, if the stub uses qOffsets. */
9694 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9695 the list of conditions (in agent expression bytecode format), if any, the
9696 target needs to evaluate. The output is placed into the packet buffer
9697 started from BUF and ended at BUF_END. */
9700 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9701 struct bp_target_info
*bp_tgt
, char *buf
,
9704 if (bp_tgt
->conditions
.empty ())
9707 buf
+= strlen (buf
);
9708 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9711 /* Send conditions to the target. */
9712 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
9714 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9715 buf
+= strlen (buf
);
9716 for (int i
= 0; i
< aexpr
->len
; ++i
)
9717 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9724 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9725 struct bp_target_info
*bp_tgt
, char *buf
)
9727 if (bp_tgt
->tcommands
.empty ())
9730 buf
+= strlen (buf
);
9732 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9733 buf
+= strlen (buf
);
9735 /* Concatenate all the agent expressions that are commands into the
9737 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
9739 sprintf (buf
, "X%x,", aexpr
->len
);
9740 buf
+= strlen (buf
);
9741 for (int i
= 0; i
< aexpr
->len
; ++i
)
9742 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9747 /* Insert a breakpoint. On targets that have software breakpoint
9748 support, we ask the remote target to do the work; on targets
9749 which don't, we insert a traditional memory breakpoint. */
9752 remote_insert_breakpoint (struct target_ops
*ops
,
9753 struct gdbarch
*gdbarch
,
9754 struct bp_target_info
*bp_tgt
)
9756 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9757 If it succeeds, then set the support to PACKET_ENABLE. If it
9758 fails, and the user has explicitly requested the Z support then
9759 report an error, otherwise, mark it disabled and go on. */
9761 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9763 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9764 struct remote_state
*rs
;
9767 /* Make sure the remote is pointing at the right process, if
9769 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9770 set_general_process ();
9772 rs
= get_remote_state ();
9774 endbuf
= rs
->buf
+ get_remote_packet_size ();
9779 addr
= (ULONGEST
) remote_address_masked (addr
);
9780 p
+= hexnumstr (p
, addr
);
9781 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9783 if (remote_supports_cond_breakpoints (ops
))
9784 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9786 if (remote_can_run_breakpoint_commands (ops
))
9787 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9790 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9792 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9798 case PACKET_UNKNOWN
:
9803 /* If this breakpoint has target-side commands but this stub doesn't
9804 support Z0 packets, throw error. */
9805 if (!bp_tgt
->tcommands
.empty ())
9806 throw_error (NOT_SUPPORTED_ERROR
, _("\
9807 Target doesn't support breakpoints that have target side commands."));
9809 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9813 remote_remove_breakpoint (struct target_ops
*ops
,
9814 struct gdbarch
*gdbarch
,
9815 struct bp_target_info
*bp_tgt
,
9816 enum remove_bp_reason reason
)
9818 CORE_ADDR addr
= bp_tgt
->placed_address
;
9819 struct remote_state
*rs
= get_remote_state ();
9821 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9824 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9826 /* Make sure the remote is pointing at the right process, if
9828 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9829 set_general_process ();
9835 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9836 p
+= hexnumstr (p
, addr
);
9837 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9840 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9842 return (rs
->buf
[0] == 'E');
9845 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
, reason
);
9848 static enum Z_packet_type
9849 watchpoint_to_Z_packet (int type
)
9854 return Z_PACKET_WRITE_WP
;
9857 return Z_PACKET_READ_WP
;
9860 return Z_PACKET_ACCESS_WP
;
9863 internal_error (__FILE__
, __LINE__
,
9864 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9869 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9870 enum target_hw_bp_type type
, struct expression
*cond
)
9872 struct remote_state
*rs
= get_remote_state ();
9873 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9875 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9877 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9880 /* Make sure the remote is pointing at the right process, if
9882 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9883 set_general_process ();
9885 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9886 p
= strchr (rs
->buf
, '\0');
9887 addr
= remote_address_masked (addr
);
9888 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9889 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9892 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9894 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9898 case PACKET_UNKNOWN
:
9903 internal_error (__FILE__
, __LINE__
,
9904 _("remote_insert_watchpoint: reached end of function"));
9908 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9909 CORE_ADDR start
, int length
)
9911 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9913 return diff
< length
;
9918 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9919 enum target_hw_bp_type type
, struct expression
*cond
)
9921 struct remote_state
*rs
= get_remote_state ();
9922 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9924 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9926 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9929 /* Make sure the remote is pointing at the right process, if
9931 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9932 set_general_process ();
9934 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
9935 p
= strchr (rs
->buf
, '\0');
9936 addr
= remote_address_masked (addr
);
9937 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9938 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9940 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9942 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9945 case PACKET_UNKNOWN
:
9950 internal_error (__FILE__
, __LINE__
,
9951 _("remote_remove_watchpoint: reached end of function"));
9955 int remote_hw_watchpoint_limit
= -1;
9956 int remote_hw_watchpoint_length_limit
= -1;
9957 int remote_hw_breakpoint_limit
= -1;
9960 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
9961 CORE_ADDR addr
, int len
)
9963 if (remote_hw_watchpoint_length_limit
== 0)
9965 else if (remote_hw_watchpoint_length_limit
< 0)
9967 else if (len
<= remote_hw_watchpoint_length_limit
)
9974 remote_check_watch_resources (struct target_ops
*self
,
9975 enum bptype type
, int cnt
, int ot
)
9977 if (type
== bp_hardware_breakpoint
)
9979 if (remote_hw_breakpoint_limit
== 0)
9981 else if (remote_hw_breakpoint_limit
< 0)
9983 else if (cnt
<= remote_hw_breakpoint_limit
)
9988 if (remote_hw_watchpoint_limit
== 0)
9990 else if (remote_hw_watchpoint_limit
< 0)
9994 else if (cnt
<= remote_hw_watchpoint_limit
)
10000 /* The to_stopped_by_sw_breakpoint method of target remote. */
10003 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10005 struct thread_info
*thread
= inferior_thread ();
10007 return (thread
->priv
!= NULL
10008 && (get_remote_thread_info (thread
)->stop_reason
10009 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10012 /* The to_supports_stopped_by_sw_breakpoint method of target
10016 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10018 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10021 /* The to_stopped_by_hw_breakpoint method of target remote. */
10024 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10026 struct thread_info
*thread
= inferior_thread ();
10028 return (thread
->priv
!= NULL
10029 && (get_remote_thread_info (thread
)->stop_reason
10030 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10033 /* The to_supports_stopped_by_hw_breakpoint method of target
10037 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10039 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10043 remote_stopped_by_watchpoint (struct target_ops
*ops
)
10045 struct thread_info
*thread
= inferior_thread ();
10047 return (thread
->priv
!= NULL
10048 && (get_remote_thread_info (thread
)->stop_reason
10049 == TARGET_STOPPED_BY_WATCHPOINT
));
10053 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
10055 struct thread_info
*thread
= inferior_thread ();
10057 if (thread
->priv
!= NULL
10058 && (get_remote_thread_info (thread
)->stop_reason
10059 == TARGET_STOPPED_BY_WATCHPOINT
))
10061 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10070 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10071 struct bp_target_info
*bp_tgt
)
10073 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10074 struct remote_state
*rs
;
10078 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10081 /* Make sure the remote is pointing at the right process, if
10083 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10084 set_general_process ();
10086 rs
= get_remote_state ();
10088 endbuf
= rs
->buf
+ get_remote_packet_size ();
10094 addr
= remote_address_masked (addr
);
10095 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10096 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10098 if (remote_supports_cond_breakpoints (self
))
10099 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10101 if (remote_can_run_breakpoint_commands (self
))
10102 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10105 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10107 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10110 if (rs
->buf
[1] == '.')
10112 message
= strchr (rs
->buf
+ 2, '.');
10114 error (_("Remote failure reply: %s"), message
+ 1);
10117 case PACKET_UNKNOWN
:
10122 internal_error (__FILE__
, __LINE__
,
10123 _("remote_insert_hw_breakpoint: reached end of function"));
10128 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10129 struct bp_target_info
*bp_tgt
)
10132 struct remote_state
*rs
= get_remote_state ();
10134 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10136 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10139 /* Make sure the remote is pointing at the right process, if
10141 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10142 set_general_process ();
10148 addr
= remote_address_masked (bp_tgt
->placed_address
);
10149 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10150 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10153 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10155 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10158 case PACKET_UNKNOWN
:
10163 internal_error (__FILE__
, __LINE__
,
10164 _("remote_remove_hw_breakpoint: reached end of function"));
10167 /* Verify memory using the "qCRC:" request. */
10170 remote_verify_memory (struct target_ops
*ops
,
10171 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10173 struct remote_state
*rs
= get_remote_state ();
10174 unsigned long host_crc
, target_crc
;
10177 /* It doesn't make sense to use qCRC if the remote target is
10178 connected but not running. */
10179 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10181 enum packet_result result
;
10183 /* Make sure the remote is pointing at the right process. */
10184 set_general_process ();
10186 /* FIXME: assumes lma can fit into long. */
10187 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10188 (long) lma
, (long) size
);
10191 /* Be clever; compute the host_crc before waiting for target
10193 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10195 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10197 result
= packet_ok (rs
->buf
,
10198 &remote_protocol_packets
[PACKET_qCRC
]);
10199 if (result
== PACKET_ERROR
)
10201 else if (result
== PACKET_OK
)
10203 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10204 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10206 return (host_crc
== target_crc
);
10210 return simple_verify_memory (ops
, data
, lma
, size
);
10213 /* compare-sections command
10215 With no arguments, compares each loadable section in the exec bfd
10216 with the same memory range on the target, and reports mismatches.
10217 Useful for verifying the image on the target against the exec file. */
10220 compare_sections_command (const char *args
, int from_tty
)
10223 const char *sectname
;
10224 bfd_size_type size
;
10227 int mismatched
= 0;
10232 error (_("command cannot be used without an exec file"));
10234 /* Make sure the remote is pointing at the right process. */
10235 set_general_process ();
10237 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10243 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10245 if (!(s
->flags
& SEC_LOAD
))
10246 continue; /* Skip non-loadable section. */
10248 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10249 continue; /* Skip writeable sections */
10251 size
= bfd_get_section_size (s
);
10253 continue; /* Skip zero-length section. */
10255 sectname
= bfd_get_section_name (exec_bfd
, s
);
10256 if (args
&& strcmp (args
, sectname
) != 0)
10257 continue; /* Not the section selected by user. */
10259 matched
= 1; /* Do this section. */
10262 gdb::byte_vector
sectdata (size
);
10263 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10265 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10268 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10269 paddress (target_gdbarch (), lma
),
10270 paddress (target_gdbarch (), lma
+ size
));
10272 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10273 paddress (target_gdbarch (), lma
),
10274 paddress (target_gdbarch (), lma
+ size
));
10276 printf_filtered ("matched.\n");
10279 printf_filtered ("MIS-MATCHED!\n");
10283 if (mismatched
> 0)
10284 warning (_("One or more sections of the target image does not match\n\
10285 the loaded file\n"));
10286 if (args
&& !matched
)
10287 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10290 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10291 into remote target. The number of bytes written to the remote
10292 target is returned, or -1 for error. */
10294 static enum target_xfer_status
10295 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
10296 const char *annex
, const gdb_byte
*writebuf
,
10297 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
10298 struct packet_config
*packet
)
10302 struct remote_state
*rs
= get_remote_state ();
10303 int max_size
= get_memory_write_packet_size ();
10305 if (packet
->support
== PACKET_DISABLE
)
10306 return TARGET_XFER_E_IO
;
10308 /* Insert header. */
10309 i
= snprintf (rs
->buf
, max_size
,
10310 "qXfer:%s:write:%s:%s:",
10311 object_name
, annex
? annex
: "",
10312 phex_nz (offset
, sizeof offset
));
10313 max_size
-= (i
+ 1);
10315 /* Escape as much data as fits into rs->buf. */
10316 buf_len
= remote_escape_output
10317 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10319 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10320 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10321 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10322 return TARGET_XFER_E_IO
;
10324 unpack_varlen_hex (rs
->buf
, &n
);
10327 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10330 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10331 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10332 number of bytes read is returned, or 0 for EOF, or -1 for error.
10333 The number of bytes read may be less than LEN without indicating an
10334 EOF. PACKET is checked and updated to indicate whether the remote
10335 target supports this object. */
10337 static enum target_xfer_status
10338 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
10340 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
10341 ULONGEST
*xfered_len
,
10342 struct packet_config
*packet
)
10344 struct remote_state
*rs
= get_remote_state ();
10345 LONGEST i
, n
, packet_len
;
10347 if (packet
->support
== PACKET_DISABLE
)
10348 return TARGET_XFER_E_IO
;
10350 /* Check whether we've cached an end-of-object packet that matches
10352 if (rs
->finished_object
)
10354 if (strcmp (object_name
, rs
->finished_object
) == 0
10355 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10356 && offset
== rs
->finished_offset
)
10357 return TARGET_XFER_EOF
;
10360 /* Otherwise, we're now reading something different. Discard
10362 xfree (rs
->finished_object
);
10363 xfree (rs
->finished_annex
);
10364 rs
->finished_object
= NULL
;
10365 rs
->finished_annex
= NULL
;
10368 /* Request only enough to fit in a single packet. The actual data
10369 may not, since we don't know how much of it will need to be escaped;
10370 the target is free to respond with slightly less data. We subtract
10371 five to account for the response type and the protocol frame. */
10372 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10373 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10374 object_name
, annex
? annex
: "",
10375 phex_nz (offset
, sizeof offset
),
10376 phex_nz (n
, sizeof n
));
10377 i
= putpkt (rs
->buf
);
10379 return TARGET_XFER_E_IO
;
10382 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10383 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10384 return TARGET_XFER_E_IO
;
10386 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10387 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10389 /* 'm' means there is (or at least might be) more data after this
10390 batch. That does not make sense unless there's at least one byte
10391 of data in this reply. */
10392 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10393 error (_("Remote qXfer reply contained no data."));
10395 /* Got some data. */
10396 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10397 packet_len
- 1, readbuf
, n
);
10399 /* 'l' is an EOF marker, possibly including a final block of data,
10400 or possibly empty. If we have the final block of a non-empty
10401 object, record this fact to bypass a subsequent partial read. */
10402 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10404 rs
->finished_object
= xstrdup (object_name
);
10405 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10406 rs
->finished_offset
= offset
+ i
;
10410 return TARGET_XFER_EOF
;
10414 return TARGET_XFER_OK
;
10418 static enum target_xfer_status
10419 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
10420 const char *annex
, gdb_byte
*readbuf
,
10421 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10422 ULONGEST
*xfered_len
)
10424 struct remote_state
*rs
;
10428 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10430 set_remote_traceframe ();
10431 set_general_thread (inferior_ptid
);
10433 rs
= get_remote_state ();
10435 /* Handle memory using the standard memory routines. */
10436 if (object
== TARGET_OBJECT_MEMORY
)
10438 /* If the remote target is connected but not running, we should
10439 pass this request down to a lower stratum (e.g. the executable
10441 if (!target_has_execution
)
10442 return TARGET_XFER_EOF
;
10444 if (writebuf
!= NULL
)
10445 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10448 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10452 /* Handle SPU memory using qxfer packets. */
10453 if (object
== TARGET_OBJECT_SPU
)
10456 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10457 xfered_len
, &remote_protocol_packets
10458 [PACKET_qXfer_spu_read
]);
10460 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10461 xfered_len
, &remote_protocol_packets
10462 [PACKET_qXfer_spu_write
]);
10465 /* Handle extra signal info using qxfer packets. */
10466 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10469 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10470 xfered_len
, &remote_protocol_packets
10471 [PACKET_qXfer_siginfo_read
]);
10473 return remote_write_qxfer (ops
, "siginfo", annex
,
10474 writebuf
, offset
, len
, xfered_len
,
10475 &remote_protocol_packets
10476 [PACKET_qXfer_siginfo_write
]);
10479 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10482 return remote_read_qxfer (ops
, "statictrace", annex
,
10483 readbuf
, offset
, len
, xfered_len
,
10484 &remote_protocol_packets
10485 [PACKET_qXfer_statictrace_read
]);
10487 return TARGET_XFER_E_IO
;
10490 /* Only handle flash writes. */
10491 if (writebuf
!= NULL
)
10495 case TARGET_OBJECT_FLASH
:
10496 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10500 return TARGET_XFER_E_IO
;
10504 /* Map pre-existing objects onto letters. DO NOT do this for new
10505 objects!!! Instead specify new query packets. */
10508 case TARGET_OBJECT_AVR
:
10512 case TARGET_OBJECT_AUXV
:
10513 gdb_assert (annex
== NULL
);
10514 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10516 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10518 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10519 return remote_read_qxfer
10520 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10521 &remote_protocol_packets
[PACKET_qXfer_features
]);
10523 case TARGET_OBJECT_LIBRARIES
:
10524 return remote_read_qxfer
10525 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10526 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10528 case TARGET_OBJECT_LIBRARIES_SVR4
:
10529 return remote_read_qxfer
10530 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10531 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10533 case TARGET_OBJECT_MEMORY_MAP
:
10534 gdb_assert (annex
== NULL
);
10535 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10537 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10539 case TARGET_OBJECT_OSDATA
:
10540 /* Should only get here if we're connected. */
10541 gdb_assert (rs
->remote_desc
);
10542 return remote_read_qxfer
10543 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10544 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10546 case TARGET_OBJECT_THREADS
:
10547 gdb_assert (annex
== NULL
);
10548 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10550 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10552 case TARGET_OBJECT_TRACEFRAME_INFO
:
10553 gdb_assert (annex
== NULL
);
10554 return remote_read_qxfer
10555 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10556 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10558 case TARGET_OBJECT_FDPIC
:
10559 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10561 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10563 case TARGET_OBJECT_OPENVMS_UIB
:
10564 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10566 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10568 case TARGET_OBJECT_BTRACE
:
10569 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10571 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10573 case TARGET_OBJECT_BTRACE_CONF
:
10574 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10576 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10578 case TARGET_OBJECT_EXEC_FILE
:
10579 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10581 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10584 return TARGET_XFER_E_IO
;
10587 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10588 large enough let the caller deal with it. */
10589 if (len
< get_remote_packet_size ())
10590 return TARGET_XFER_E_IO
;
10591 len
= get_remote_packet_size ();
10593 /* Except for querying the minimum buffer size, target must be open. */
10594 if (!rs
->remote_desc
)
10595 error (_("remote query is only available after target open"));
10597 gdb_assert (annex
!= NULL
);
10598 gdb_assert (readbuf
!= NULL
);
10602 *p2
++ = query_type
;
10604 /* We used one buffer char for the remote protocol q command and
10605 another for the query type. As the remote protocol encapsulation
10606 uses 4 chars plus one extra in case we are debugging
10607 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10610 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10612 /* Bad caller may have sent forbidden characters. */
10613 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10618 gdb_assert (annex
[i
] == '\0');
10620 i
= putpkt (rs
->buf
);
10622 return TARGET_XFER_E_IO
;
10624 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10625 strcpy ((char *) readbuf
, rs
->buf
);
10627 *xfered_len
= strlen ((char *) readbuf
);
10628 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10631 /* Implementation of to_get_memory_xfer_limit. */
10634 remote_get_memory_xfer_limit (struct target_ops
*ops
)
10636 return get_memory_write_packet_size ();
10640 remote_search_memory (struct target_ops
* ops
,
10641 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10642 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10643 CORE_ADDR
*found_addrp
)
10645 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10646 struct remote_state
*rs
= get_remote_state ();
10647 int max_size
= get_memory_write_packet_size ();
10648 struct packet_config
*packet
=
10649 &remote_protocol_packets
[PACKET_qSearch_memory
];
10650 /* Number of packet bytes used to encode the pattern;
10651 this could be more than PATTERN_LEN due to escape characters. */
10652 int escaped_pattern_len
;
10653 /* Amount of pattern that was encodable in the packet. */
10654 int used_pattern_len
;
10657 ULONGEST found_addr
;
10659 /* Don't go to the target if we don't have to.
10660 This is done before checking packet->support to avoid the possibility that
10661 a success for this edge case means the facility works in general. */
10662 if (pattern_len
> search_space_len
)
10664 if (pattern_len
== 0)
10666 *found_addrp
= start_addr
;
10670 /* If we already know the packet isn't supported, fall back to the simple
10671 way of searching memory. */
10673 if (packet_config_support (packet
) == PACKET_DISABLE
)
10675 /* Target doesn't provided special support, fall back and use the
10676 standard support (copy memory and do the search here). */
10677 return simple_search_memory (ops
, start_addr
, search_space_len
,
10678 pattern
, pattern_len
, found_addrp
);
10681 /* Make sure the remote is pointing at the right process. */
10682 set_general_process ();
10684 /* Insert header. */
10685 i
= snprintf (rs
->buf
, max_size
,
10686 "qSearch:memory:%s;%s;",
10687 phex_nz (start_addr
, addr_size
),
10688 phex_nz (search_space_len
, sizeof (search_space_len
)));
10689 max_size
-= (i
+ 1);
10691 /* Escape as much data as fits into rs->buf. */
10692 escaped_pattern_len
=
10693 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10694 &used_pattern_len
, max_size
);
10696 /* Bail if the pattern is too large. */
10697 if (used_pattern_len
!= pattern_len
)
10698 error (_("Pattern is too large to transmit to remote target."));
10700 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10701 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10702 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10704 /* The request may not have worked because the command is not
10705 supported. If so, fall back to the simple way. */
10706 if (packet
->support
== PACKET_DISABLE
)
10708 return simple_search_memory (ops
, start_addr
, search_space_len
,
10709 pattern
, pattern_len
, found_addrp
);
10714 if (rs
->buf
[0] == '0')
10716 else if (rs
->buf
[0] == '1')
10719 if (rs
->buf
[1] != ',')
10720 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10721 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10722 *found_addrp
= found_addr
;
10725 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10731 remote_rcmd (struct target_ops
*self
, const char *command
,
10732 struct ui_file
*outbuf
)
10734 struct remote_state
*rs
= get_remote_state ();
10737 if (!rs
->remote_desc
)
10738 error (_("remote rcmd is only available after target open"));
10740 /* Send a NULL command across as an empty command. */
10741 if (command
== NULL
)
10744 /* The query prefix. */
10745 strcpy (rs
->buf
, "qRcmd,");
10746 p
= strchr (rs
->buf
, '\0');
10748 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10749 > get_remote_packet_size ())
10750 error (_("\"monitor\" command ``%s'' is too long."), command
);
10752 /* Encode the actual command. */
10753 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10755 if (putpkt (rs
->buf
) < 0)
10756 error (_("Communication problem with target."));
10758 /* get/display the response */
10763 /* XXX - see also remote_get_noisy_reply(). */
10764 QUIT
; /* Allow user to bail out with ^C. */
10766 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10768 /* Timeout. Continue to (try to) read responses.
10769 This is better than stopping with an error, assuming the stub
10770 is still executing the (long) monitor command.
10771 If needed, the user can interrupt gdb using C-c, obtaining
10772 an effect similar to stop on timeout. */
10776 if (buf
[0] == '\0')
10777 error (_("Target does not support this command."));
10778 if (buf
[0] == 'O' && buf
[1] != 'K')
10780 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10783 if (strcmp (buf
, "OK") == 0)
10785 if (strlen (buf
) == 3 && buf
[0] == 'E'
10786 && isdigit (buf
[1]) && isdigit (buf
[2]))
10788 error (_("Protocol error with Rcmd"));
10790 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10792 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10794 fputc_unfiltered (c
, outbuf
);
10800 static std::vector
<mem_region
>
10801 remote_memory_map (struct target_ops
*ops
)
10803 std::vector
<mem_region
> result
;
10804 gdb::unique_xmalloc_ptr
<char> text
10805 = target_read_stralloc (¤t_target
, TARGET_OBJECT_MEMORY_MAP
, NULL
);
10808 result
= parse_memory_map (text
.get ());
10814 packet_command (const char *args
, int from_tty
)
10816 struct remote_state
*rs
= get_remote_state ();
10818 if (!rs
->remote_desc
)
10819 error (_("command can only be used with remote target"));
10822 error (_("remote-packet command requires packet text as argument"));
10824 puts_filtered ("sending: ");
10825 print_packet (args
);
10826 puts_filtered ("\n");
10829 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10830 puts_filtered ("received: ");
10831 print_packet (rs
->buf
);
10832 puts_filtered ("\n");
10836 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10838 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10840 static void threadset_test_cmd (char *cmd
, int tty
);
10842 static void threadalive_test (char *cmd
, int tty
);
10844 static void threadlist_test_cmd (char *cmd
, int tty
);
10846 int get_and_display_threadinfo (threadref
*ref
);
10848 static void threadinfo_test_cmd (char *cmd
, int tty
);
10850 static int thread_display_step (threadref
*ref
, void *context
);
10852 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10854 static void init_remote_threadtests (void);
10856 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10859 threadset_test_cmd (const char *cmd
, int tty
)
10861 int sample_thread
= SAMPLE_THREAD
;
10863 printf_filtered (_("Remote threadset test\n"));
10864 set_general_thread (sample_thread
);
10869 threadalive_test (const char *cmd
, int tty
)
10871 int sample_thread
= SAMPLE_THREAD
;
10872 int pid
= ptid_get_pid (inferior_ptid
);
10873 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10875 if (remote_thread_alive (ptid
))
10876 printf_filtered ("PASS: Thread alive test\n");
10878 printf_filtered ("FAIL: Thread alive test\n");
10881 void output_threadid (char *title
, threadref
*ref
);
10884 output_threadid (char *title
, threadref
*ref
)
10888 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10890 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10894 threadlist_test_cmd (const char *cmd
, int tty
)
10897 threadref nextthread
;
10898 int done
, result_count
;
10899 threadref threadlist
[3];
10901 printf_filtered ("Remote Threadlist test\n");
10902 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10903 &result_count
, &threadlist
[0]))
10904 printf_filtered ("FAIL: threadlist test\n");
10907 threadref
*scan
= threadlist
;
10908 threadref
*limit
= scan
+ result_count
;
10910 while (scan
< limit
)
10911 output_threadid (" thread ", scan
++);
10916 display_thread_info (struct gdb_ext_thread_info
*info
)
10918 output_threadid ("Threadid: ", &info
->threadid
);
10919 printf_filtered ("Name: %s\n ", info
->shortname
);
10920 printf_filtered ("State: %s\n", info
->display
);
10921 printf_filtered ("other: %s\n\n", info
->more_display
);
10925 get_and_display_threadinfo (threadref
*ref
)
10929 struct gdb_ext_thread_info threadinfo
;
10931 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
10932 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
10933 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
10934 display_thread_info (&threadinfo
);
10939 threadinfo_test_cmd (const char *cmd
, int tty
)
10941 int athread
= SAMPLE_THREAD
;
10945 int_to_threadref (&thread
, athread
);
10946 printf_filtered ("Remote Threadinfo test\n");
10947 if (!get_and_display_threadinfo (&thread
))
10948 printf_filtered ("FAIL cannot get thread info\n");
10952 thread_display_step (threadref
*ref
, void *context
)
10954 /* output_threadid(" threadstep ",ref); *//* simple test */
10955 return get_and_display_threadinfo (ref
);
10959 threadlist_update_test_cmd (const char *cmd
, int tty
)
10961 printf_filtered ("Remote Threadlist update test\n");
10962 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
10966 init_remote_threadtests (void)
10968 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
10969 _("Fetch and print the remote list of "
10970 "thread identifiers, one pkt only"));
10971 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
10972 _("Fetch and display info about one thread"));
10973 add_com ("tset", class_obscure
, threadset_test_cmd
,
10974 _("Test setting to a different thread"));
10975 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
10976 _("Iterate through updating all remote thread info"));
10977 add_com ("talive", class_obscure
, threadalive_test
,
10978 _(" Remote thread alive test "));
10983 /* Convert a thread ID to a string. Returns the string in a static
10986 static const char *
10987 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
10989 static char buf
[64];
10990 struct remote_state
*rs
= get_remote_state ();
10992 if (ptid_equal (ptid
, null_ptid
))
10993 return normal_pid_to_str (ptid
);
10994 else if (ptid_is_pid (ptid
))
10996 /* Printing an inferior target id. */
10998 /* When multi-process extensions are off, there's no way in the
10999 remote protocol to know the remote process id, if there's any
11000 at all. There's one exception --- when we're connected with
11001 target extended-remote, and we manually attached to a process
11002 with "attach PID". We don't record anywhere a flag that
11003 allows us to distinguish that case from the case of
11004 connecting with extended-remote and the stub already being
11005 attached to a process, and reporting yes to qAttached, hence
11006 no smart special casing here. */
11007 if (!remote_multi_process_p (rs
))
11009 xsnprintf (buf
, sizeof buf
, "Remote target");
11013 return normal_pid_to_str (ptid
);
11017 if (ptid_equal (magic_null_ptid
, ptid
))
11018 xsnprintf (buf
, sizeof buf
, "Thread <main>");
11019 else if (remote_multi_process_p (rs
))
11020 if (ptid_get_lwp (ptid
) == 0)
11021 return normal_pid_to_str (ptid
);
11023 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
11024 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
11026 xsnprintf (buf
, sizeof buf
, "Thread %ld",
11027 ptid_get_lwp (ptid
));
11032 /* Get the address of the thread local variable in OBJFILE which is
11033 stored at OFFSET within the thread local storage for thread PTID. */
11036 remote_get_thread_local_address (struct target_ops
*ops
,
11037 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
11039 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11041 struct remote_state
*rs
= get_remote_state ();
11043 char *endp
= rs
->buf
+ get_remote_packet_size ();
11044 enum packet_result result
;
11046 strcpy (p
, "qGetTLSAddr:");
11048 p
= write_ptid (p
, endp
, ptid
);
11050 p
+= hexnumstr (p
, offset
);
11052 p
+= hexnumstr (p
, lm
);
11056 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11057 result
= packet_ok (rs
->buf
,
11058 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11059 if (result
== PACKET_OK
)
11063 unpack_varlen_hex (rs
->buf
, &result
);
11066 else if (result
== PACKET_UNKNOWN
)
11067 throw_error (TLS_GENERIC_ERROR
,
11068 _("Remote target doesn't support qGetTLSAddr packet"));
11070 throw_error (TLS_GENERIC_ERROR
,
11071 _("Remote target failed to process qGetTLSAddr request"));
11074 throw_error (TLS_GENERIC_ERROR
,
11075 _("TLS not supported or disabled on this target"));
11080 /* Provide thread local base, i.e. Thread Information Block address.
11081 Returns 1 if ptid is found and thread_local_base is non zero. */
11084 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
11086 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11088 struct remote_state
*rs
= get_remote_state ();
11090 char *endp
= rs
->buf
+ get_remote_packet_size ();
11091 enum packet_result result
;
11093 strcpy (p
, "qGetTIBAddr:");
11095 p
= write_ptid (p
, endp
, ptid
);
11099 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11100 result
= packet_ok (rs
->buf
,
11101 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11102 if (result
== PACKET_OK
)
11106 unpack_varlen_hex (rs
->buf
, &result
);
11108 *addr
= (CORE_ADDR
) result
;
11111 else if (result
== PACKET_UNKNOWN
)
11112 error (_("Remote target doesn't support qGetTIBAddr packet"));
11114 error (_("Remote target failed to process qGetTIBAddr request"));
11117 error (_("qGetTIBAddr not supported or disabled on this target"));
11122 /* Support for inferring a target description based on the current
11123 architecture and the size of a 'g' packet. While the 'g' packet
11124 can have any size (since optional registers can be left off the
11125 end), some sizes are easily recognizable given knowledge of the
11126 approximate architecture. */
11128 struct remote_g_packet_guess
11131 const struct target_desc
*tdesc
;
11133 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
11134 DEF_VEC_O(remote_g_packet_guess_s
);
11136 struct remote_g_packet_data
11138 VEC(remote_g_packet_guess_s
) *guesses
;
11141 static struct gdbarch_data
*remote_g_packet_data_handle
;
11144 remote_g_packet_data_init (struct obstack
*obstack
)
11146 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
11150 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11151 const struct target_desc
*tdesc
)
11153 struct remote_g_packet_data
*data
11154 = ((struct remote_g_packet_data
*)
11155 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11156 struct remote_g_packet_guess new_guess
, *guess
;
11159 gdb_assert (tdesc
!= NULL
);
11162 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11164 if (guess
->bytes
== bytes
)
11165 internal_error (__FILE__
, __LINE__
,
11166 _("Duplicate g packet description added for size %d"),
11169 new_guess
.bytes
= bytes
;
11170 new_guess
.tdesc
= tdesc
;
11171 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
11174 /* Return 1 if remote_read_description would do anything on this target
11175 and architecture, 0 otherwise. */
11178 remote_read_description_p (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 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11190 static const struct target_desc
*
11191 remote_read_description (struct target_ops
*target
)
11193 struct remote_g_packet_data
*data
11194 = ((struct remote_g_packet_data
*)
11195 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11197 /* Do not try this during initial connection, when we do not know
11198 whether there is a running but stopped thread. */
11199 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
11200 return target
->beneath
->to_read_description (target
->beneath
);
11202 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11204 struct remote_g_packet_guess
*guess
;
11206 int bytes
= send_g_packet ();
11209 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11211 if (guess
->bytes
== bytes
)
11212 return guess
->tdesc
;
11214 /* We discard the g packet. A minor optimization would be to
11215 hold on to it, and fill the register cache once we have selected
11216 an architecture, but it's too tricky to do safely. */
11219 return target
->beneath
->to_read_description (target
->beneath
);
11222 /* Remote file transfer support. This is host-initiated I/O, not
11223 target-initiated; for target-initiated, see remote-fileio.c. */
11225 /* If *LEFT is at least the length of STRING, copy STRING to
11226 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11227 decrease *LEFT. Otherwise raise an error. */
11230 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11232 int len
= strlen (string
);
11235 error (_("Packet too long for target."));
11237 memcpy (*buffer
, string
, len
);
11241 /* NUL-terminate the buffer as a convenience, if there is
11247 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11248 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11249 decrease *LEFT. Otherwise raise an error. */
11252 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11255 if (2 * len
> *left
)
11256 error (_("Packet too long for target."));
11258 bin2hex (bytes
, *buffer
, len
);
11259 *buffer
+= 2 * len
;
11262 /* NUL-terminate the buffer as a convenience, if there is
11268 /* If *LEFT is large enough, convert VALUE to hex and add it to
11269 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11270 decrease *LEFT. Otherwise raise an error. */
11273 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11275 int len
= hexnumlen (value
);
11278 error (_("Packet too long for target."));
11280 hexnumstr (*buffer
, value
);
11284 /* NUL-terminate the buffer as a convenience, if there is
11290 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11291 value, *REMOTE_ERRNO to the remote error number or zero if none
11292 was included, and *ATTACHMENT to point to the start of the annex
11293 if any. The length of the packet isn't needed here; there may
11294 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11296 Return 0 if the packet could be parsed, -1 if it could not. If
11297 -1 is returned, the other variables may not be initialized. */
11300 remote_hostio_parse_result (char *buffer
, int *retcode
,
11301 int *remote_errno
, char **attachment
)
11306 *attachment
= NULL
;
11308 if (buffer
[0] != 'F')
11312 *retcode
= strtol (&buffer
[1], &p
, 16);
11313 if (errno
!= 0 || p
== &buffer
[1])
11316 /* Check for ",errno". */
11320 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11321 if (errno
!= 0 || p
+ 1 == p2
)
11326 /* Check for ";attachment". If there is no attachment, the
11327 packet should end here. */
11330 *attachment
= p
+ 1;
11333 else if (*p
== '\0')
11339 /* Send a prepared I/O packet to the target and read its response.
11340 The prepared packet is in the global RS->BUF before this function
11341 is called, and the answer is there when we return.
11343 COMMAND_BYTES is the length of the request to send, which may include
11344 binary data. WHICH_PACKET is the packet configuration to check
11345 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11346 is set to the error number and -1 is returned. Otherwise the value
11347 returned by the function is returned.
11349 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11350 attachment is expected; an error will be reported if there's a
11351 mismatch. If one is found, *ATTACHMENT will be set to point into
11352 the packet buffer and *ATTACHMENT_LEN will be set to the
11353 attachment's length. */
11356 remote_hostio_send_command (int command_bytes
, int which_packet
,
11357 int *remote_errno
, char **attachment
,
11358 int *attachment_len
)
11360 struct remote_state
*rs
= get_remote_state ();
11361 int ret
, bytes_read
;
11362 char *attachment_tmp
;
11364 if (!rs
->remote_desc
11365 || packet_support (which_packet
) == PACKET_DISABLE
)
11367 *remote_errno
= FILEIO_ENOSYS
;
11371 putpkt_binary (rs
->buf
, command_bytes
);
11372 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11374 /* If it timed out, something is wrong. Don't try to parse the
11376 if (bytes_read
< 0)
11378 *remote_errno
= FILEIO_EINVAL
;
11382 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11385 *remote_errno
= FILEIO_EINVAL
;
11387 case PACKET_UNKNOWN
:
11388 *remote_errno
= FILEIO_ENOSYS
;
11394 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11397 *remote_errno
= FILEIO_EINVAL
;
11401 /* Make sure we saw an attachment if and only if we expected one. */
11402 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11403 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11405 *remote_errno
= FILEIO_EINVAL
;
11409 /* If an attachment was found, it must point into the packet buffer;
11410 work out how many bytes there were. */
11411 if (attachment_tmp
!= NULL
)
11413 *attachment
= attachment_tmp
;
11414 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11420 /* Invalidate the readahead cache. */
11423 readahead_cache_invalidate (void)
11425 struct remote_state
*rs
= get_remote_state ();
11427 rs
->readahead_cache
.fd
= -1;
11430 /* Invalidate the readahead cache if it is holding data for FD. */
11433 readahead_cache_invalidate_fd (int fd
)
11435 struct remote_state
*rs
= get_remote_state ();
11437 if (rs
->readahead_cache
.fd
== fd
)
11438 rs
->readahead_cache
.fd
= -1;
11441 /* Set the filesystem remote_hostio functions that take FILENAME
11442 arguments will use. Return 0 on success, or -1 if an error
11443 occurs (and set *REMOTE_ERRNO). */
11446 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11448 struct remote_state
*rs
= get_remote_state ();
11449 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11451 int left
= get_remote_packet_size () - 1;
11455 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11458 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11461 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11463 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11464 remote_buffer_add_string (&p
, &left
, arg
);
11466 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11467 remote_errno
, NULL
, NULL
);
11469 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11473 rs
->fs_pid
= required_pid
;
11478 /* Implementation of to_fileio_open. */
11481 remote_hostio_open (struct target_ops
*self
,
11482 struct inferior
*inf
, const char *filename
,
11483 int flags
, int mode
, int warn_if_slow
,
11486 struct remote_state
*rs
= get_remote_state ();
11488 int left
= get_remote_packet_size () - 1;
11492 static int warning_issued
= 0;
11494 printf_unfiltered (_("Reading %s from remote target...\n"),
11497 if (!warning_issued
)
11499 warning (_("File transfers from remote targets can be slow."
11500 " Use \"set sysroot\" to access files locally"
11502 warning_issued
= 1;
11506 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11509 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11511 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11512 strlen (filename
));
11513 remote_buffer_add_string (&p
, &left
, ",");
11515 remote_buffer_add_int (&p
, &left
, flags
);
11516 remote_buffer_add_string (&p
, &left
, ",");
11518 remote_buffer_add_int (&p
, &left
, mode
);
11520 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11521 remote_errno
, NULL
, NULL
);
11524 /* Implementation of to_fileio_pwrite. */
11527 remote_hostio_pwrite (struct target_ops
*self
,
11528 int fd
, const gdb_byte
*write_buf
, int len
,
11529 ULONGEST offset
, int *remote_errno
)
11531 struct remote_state
*rs
= get_remote_state ();
11533 int left
= get_remote_packet_size ();
11536 readahead_cache_invalidate_fd (fd
);
11538 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11540 remote_buffer_add_int (&p
, &left
, fd
);
11541 remote_buffer_add_string (&p
, &left
, ",");
11543 remote_buffer_add_int (&p
, &left
, offset
);
11544 remote_buffer_add_string (&p
, &left
, ",");
11546 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11547 get_remote_packet_size () - (p
- rs
->buf
));
11549 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11550 remote_errno
, NULL
, NULL
);
11553 /* Helper for the implementation of to_fileio_pread. Read the file
11554 from the remote side with vFile:pread. */
11557 remote_hostio_pread_vFile (struct target_ops
*self
,
11558 int fd
, gdb_byte
*read_buf
, int len
,
11559 ULONGEST offset
, int *remote_errno
)
11561 struct remote_state
*rs
= get_remote_state ();
11564 int left
= get_remote_packet_size ();
11565 int ret
, attachment_len
;
11568 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11570 remote_buffer_add_int (&p
, &left
, fd
);
11571 remote_buffer_add_string (&p
, &left
, ",");
11573 remote_buffer_add_int (&p
, &left
, len
);
11574 remote_buffer_add_string (&p
, &left
, ",");
11576 remote_buffer_add_int (&p
, &left
, offset
);
11578 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11579 remote_errno
, &attachment
,
11585 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11587 if (read_len
!= ret
)
11588 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11593 /* Serve pread from the readahead cache. Returns number of bytes
11594 read, or 0 if the request can't be served from the cache. */
11597 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11598 int fd
, gdb_byte
*read_buf
, size_t len
,
11601 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11603 if (cache
->fd
== fd
11604 && cache
->offset
<= offset
11605 && offset
< cache
->offset
+ cache
->bufsize
)
11607 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11609 if (offset
+ len
> max
)
11610 len
= max
- offset
;
11612 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11619 /* Implementation of to_fileio_pread. */
11622 remote_hostio_pread (struct target_ops
*self
,
11623 int fd
, gdb_byte
*read_buf
, int len
,
11624 ULONGEST offset
, int *remote_errno
)
11627 struct remote_state
*rs
= get_remote_state ();
11628 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11630 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11633 cache
->hit_count
++;
11636 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11637 pulongest (cache
->hit_count
));
11641 cache
->miss_count
++;
11643 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11644 pulongest (cache
->miss_count
));
11647 cache
->offset
= offset
;
11648 cache
->bufsize
= get_remote_packet_size ();
11649 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11651 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11652 cache
->offset
, remote_errno
);
11655 readahead_cache_invalidate_fd (fd
);
11659 cache
->bufsize
= ret
;
11660 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11663 /* Implementation of to_fileio_close. */
11666 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11668 struct remote_state
*rs
= get_remote_state ();
11670 int left
= get_remote_packet_size () - 1;
11672 readahead_cache_invalidate_fd (fd
);
11674 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11676 remote_buffer_add_int (&p
, &left
, fd
);
11678 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11679 remote_errno
, NULL
, NULL
);
11682 /* Implementation of to_fileio_unlink. */
11685 remote_hostio_unlink (struct target_ops
*self
,
11686 struct inferior
*inf
, const char *filename
,
11689 struct remote_state
*rs
= get_remote_state ();
11691 int left
= get_remote_packet_size () - 1;
11693 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11696 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11698 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11699 strlen (filename
));
11701 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11702 remote_errno
, NULL
, NULL
);
11705 /* Implementation of to_fileio_readlink. */
11708 remote_hostio_readlink (struct target_ops
*self
,
11709 struct inferior
*inf
, const char *filename
,
11712 struct remote_state
*rs
= get_remote_state ();
11715 int left
= get_remote_packet_size ();
11716 int len
, attachment_len
;
11720 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11723 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11725 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11726 strlen (filename
));
11728 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11729 remote_errno
, &attachment
,
11735 ret
= (char *) xmalloc (len
+ 1);
11737 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11738 (gdb_byte
*) ret
, len
);
11739 if (read_len
!= len
)
11740 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11746 /* Implementation of to_fileio_fstat. */
11749 remote_hostio_fstat (struct target_ops
*self
,
11750 int fd
, struct stat
*st
,
11753 struct remote_state
*rs
= get_remote_state ();
11755 int left
= get_remote_packet_size ();
11756 int attachment_len
, ret
;
11758 struct fio_stat fst
;
11761 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11763 remote_buffer_add_int (&p
, &left
, fd
);
11765 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11766 remote_errno
, &attachment
,
11770 if (*remote_errno
!= FILEIO_ENOSYS
)
11773 /* Strictly we should return -1, ENOSYS here, but when
11774 "set sysroot remote:" was implemented in August 2008
11775 BFD's need for a stat function was sidestepped with
11776 this hack. This was not remedied until March 2015
11777 so we retain the previous behavior to avoid breaking
11780 Note that the memset is a March 2015 addition; older
11781 GDBs set st_size *and nothing else* so the structure
11782 would have garbage in all other fields. This might
11783 break something but retaining the previous behavior
11784 here would be just too wrong. */
11786 memset (st
, 0, sizeof (struct stat
));
11787 st
->st_size
= INT_MAX
;
11791 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11792 (gdb_byte
*) &fst
, sizeof (fst
));
11794 if (read_len
!= ret
)
11795 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11797 if (read_len
!= sizeof (fst
))
11798 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11799 read_len
, (int) sizeof (fst
));
11801 remote_fileio_to_host_stat (&fst
, st
);
11806 /* Implementation of to_filesystem_is_local. */
11809 remote_filesystem_is_local (struct target_ops
*self
)
11811 /* Valgrind GDB presents itself as a remote target but works
11812 on the local filesystem: it does not implement remote get
11813 and users are not expected to set a sysroot. To handle
11814 this case we treat the remote filesystem as local if the
11815 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11816 does not support vFile:open. */
11817 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11819 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11821 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11823 int fd
, remote_errno
;
11825 /* Try opening a file to probe support. The supplied
11826 filename is irrelevant, we only care about whether
11827 the stub recognizes the packet or not. */
11828 fd
= remote_hostio_open (self
, NULL
, "just probing",
11829 FILEIO_O_RDONLY
, 0700, 0,
11833 remote_hostio_close (self
, fd
, &remote_errno
);
11835 ps
= packet_support (PACKET_vFile_open
);
11838 if (ps
== PACKET_DISABLE
)
11840 static int warning_issued
= 0;
11842 if (!warning_issued
)
11844 warning (_("remote target does not support file"
11845 " transfer, attempting to access files"
11846 " from local filesystem."));
11847 warning_issued
= 1;
11858 remote_fileio_errno_to_host (int errnum
)
11864 case FILEIO_ENOENT
:
11872 case FILEIO_EACCES
:
11874 case FILEIO_EFAULT
:
11878 case FILEIO_EEXIST
:
11880 case FILEIO_ENODEV
:
11882 case FILEIO_ENOTDIR
:
11884 case FILEIO_EISDIR
:
11886 case FILEIO_EINVAL
:
11888 case FILEIO_ENFILE
:
11890 case FILEIO_EMFILE
:
11894 case FILEIO_ENOSPC
:
11896 case FILEIO_ESPIPE
:
11900 case FILEIO_ENOSYS
:
11902 case FILEIO_ENAMETOOLONG
:
11903 return ENAMETOOLONG
;
11909 remote_hostio_error (int errnum
)
11911 int host_error
= remote_fileio_errno_to_host (errnum
);
11913 if (host_error
== -1)
11914 error (_("Unknown remote I/O error %d"), errnum
);
11916 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11920 remote_hostio_close_cleanup (void *opaque
)
11922 int fd
= *(int *) opaque
;
11925 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
11929 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
11931 struct cleanup
*back_to
, *close_cleanup
;
11932 int retcode
, fd
, remote_errno
, bytes
, io_size
;
11934 int bytes_in_buffer
;
11937 struct remote_state
*rs
= get_remote_state ();
11939 if (!rs
->remote_desc
)
11940 error (_("command can only be used with remote target"));
11942 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
11944 perror_with_name (local_file
);
11946 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11947 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
11949 0700, 0, &remote_errno
);
11951 remote_hostio_error (remote_errno
);
11953 /* Send up to this many bytes at once. They won't all fit in the
11954 remote packet limit, so we'll transfer slightly fewer. */
11955 io_size
= get_remote_packet_size ();
11956 buffer
= (gdb_byte
*) xmalloc (io_size
);
11957 back_to
= make_cleanup (xfree
, buffer
);
11959 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11961 bytes_in_buffer
= 0;
11964 while (bytes_in_buffer
|| !saw_eof
)
11968 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
11969 io_size
- bytes_in_buffer
,
11973 if (ferror (file
.get ()))
11974 error (_("Error reading %s."), local_file
);
11977 /* EOF. Unless there is something still in the
11978 buffer from the last iteration, we are done. */
11980 if (bytes_in_buffer
== 0)
11988 bytes
+= bytes_in_buffer
;
11989 bytes_in_buffer
= 0;
11991 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
11993 offset
, &remote_errno
);
11996 remote_hostio_error (remote_errno
);
11997 else if (retcode
== 0)
11998 error (_("Remote write of %d bytes returned 0!"), bytes
);
11999 else if (retcode
< bytes
)
12001 /* Short write. Save the rest of the read data for the next
12003 bytes_in_buffer
= bytes
- retcode
;
12004 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
12010 discard_cleanups (close_cleanup
);
12011 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12012 remote_hostio_error (remote_errno
);
12015 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12016 do_cleanups (back_to
);
12020 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12022 struct cleanup
*back_to
, *close_cleanup
;
12023 int fd
, remote_errno
, bytes
, io_size
;
12026 struct remote_state
*rs
= get_remote_state ();
12028 if (!rs
->remote_desc
)
12029 error (_("command can only be used with remote target"));
12031 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12032 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12035 remote_hostio_error (remote_errno
);
12037 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12039 perror_with_name (local_file
);
12041 /* Send up to this many bytes at once. They won't all fit in the
12042 remote packet limit, so we'll transfer slightly fewer. */
12043 io_size
= get_remote_packet_size ();
12044 buffer
= (gdb_byte
*) xmalloc (io_size
);
12045 back_to
= make_cleanup (xfree
, buffer
);
12047 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12052 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
12053 fd
, buffer
, io_size
, offset
, &remote_errno
);
12055 /* Success, but no bytes, means end-of-file. */
12058 remote_hostio_error (remote_errno
);
12062 bytes
= fwrite (buffer
, 1, bytes
, file
.get ());
12064 perror_with_name (local_file
);
12067 discard_cleanups (close_cleanup
);
12068 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12069 remote_hostio_error (remote_errno
);
12072 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12073 do_cleanups (back_to
);
12077 remote_file_delete (const char *remote_file
, int from_tty
)
12079 int retcode
, remote_errno
;
12080 struct remote_state
*rs
= get_remote_state ();
12082 if (!rs
->remote_desc
)
12083 error (_("command can only be used with remote target"));
12085 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
12086 NULL
, remote_file
, &remote_errno
);
12088 remote_hostio_error (remote_errno
);
12091 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12095 remote_put_command (const char *args
, int from_tty
)
12098 error_no_arg (_("file to put"));
12100 gdb_argv
argv (args
);
12101 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12102 error (_("Invalid parameters to remote put"));
12104 remote_file_put (argv
[0], argv
[1], from_tty
);
12108 remote_get_command (const char *args
, int from_tty
)
12111 error_no_arg (_("file to get"));
12113 gdb_argv
argv (args
);
12114 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12115 error (_("Invalid parameters to remote get"));
12117 remote_file_get (argv
[0], argv
[1], from_tty
);
12121 remote_delete_command (const char *args
, int from_tty
)
12124 error_no_arg (_("file to delete"));
12126 gdb_argv
argv (args
);
12127 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12128 error (_("Invalid parameters to remote delete"));
12130 remote_file_delete (argv
[0], from_tty
);
12134 remote_command (const char *args
, int from_tty
)
12136 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12140 remote_can_execute_reverse (struct target_ops
*self
)
12142 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12143 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12150 remote_supports_non_stop (struct target_ops
*self
)
12156 remote_supports_disable_randomization (struct target_ops
*self
)
12158 /* Only supported in extended mode. */
12163 remote_supports_multi_process (struct target_ops
*self
)
12165 struct remote_state
*rs
= get_remote_state ();
12167 return remote_multi_process_p (rs
);
12171 remote_supports_cond_tracepoints (void)
12173 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12177 remote_supports_cond_breakpoints (struct target_ops
*self
)
12179 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12183 remote_supports_fast_tracepoints (void)
12185 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12189 remote_supports_static_tracepoints (void)
12191 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12195 remote_supports_install_in_trace (void)
12197 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12201 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
12203 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12208 remote_supports_string_tracing (struct target_ops
*self
)
12210 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12214 remote_can_run_breakpoint_commands (struct target_ops
*self
)
12216 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12220 remote_trace_init (struct target_ops
*self
)
12222 struct remote_state
*rs
= get_remote_state ();
12225 remote_get_noisy_reply ();
12226 if (strcmp (rs
->buf
, "OK") != 0)
12227 error (_("Target does not support this command."));
12230 /* Recursive routine to walk through command list including loops, and
12231 download packets for each command. */
12234 remote_download_command_source (int num
, ULONGEST addr
,
12235 struct command_line
*cmds
)
12237 struct remote_state
*rs
= get_remote_state ();
12238 struct command_line
*cmd
;
12240 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12242 QUIT
; /* Allow user to bail out with ^C. */
12243 strcpy (rs
->buf
, "QTDPsrc:");
12244 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12245 rs
->buf
+ strlen (rs
->buf
),
12246 rs
->buf_size
- strlen (rs
->buf
));
12248 remote_get_noisy_reply ();
12249 if (strcmp (rs
->buf
, "OK"))
12250 warning (_("Target does not support source download."));
12252 if (cmd
->control_type
== while_control
12253 || cmd
->control_type
== while_stepping_control
)
12255 remote_download_command_source (num
, addr
, *cmd
->body_list
);
12257 QUIT
; /* Allow user to bail out with ^C. */
12258 strcpy (rs
->buf
, "QTDPsrc:");
12259 encode_source_string (num
, addr
, "cmd", "end",
12260 rs
->buf
+ strlen (rs
->buf
),
12261 rs
->buf_size
- strlen (rs
->buf
));
12263 remote_get_noisy_reply ();
12264 if (strcmp (rs
->buf
, "OK"))
12265 warning (_("Target does not support source download."));
12271 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
12273 #define BUF_SIZE 2048
12277 char buf
[BUF_SIZE
];
12278 std::vector
<std::string
> tdp_actions
;
12279 std::vector
<std::string
> stepping_actions
;
12281 struct breakpoint
*b
= loc
->owner
;
12282 struct tracepoint
*t
= (struct tracepoint
*) b
;
12283 struct remote_state
*rs
= get_remote_state ();
12285 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12287 tpaddr
= loc
->address
;
12288 sprintf_vma (addrbuf
, tpaddr
);
12289 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
12290 addrbuf
, /* address */
12291 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12292 t
->step_count
, t
->pass_count
);
12293 /* Fast tracepoints are mostly handled by the target, but we can
12294 tell the target how big of an instruction block should be moved
12296 if (b
->type
== bp_fast_tracepoint
)
12298 /* Only test for support at download time; we may not know
12299 target capabilities at definition time. */
12300 if (remote_supports_fast_tracepoints ())
12302 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12304 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
12305 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12307 /* If it passed validation at definition but fails now,
12308 something is very wrong. */
12309 internal_error (__FILE__
, __LINE__
,
12310 _("Fast tracepoint not "
12311 "valid during download"));
12314 /* Fast tracepoints are functionally identical to regular
12315 tracepoints, so don't take lack of support as a reason to
12316 give up on the trace run. */
12317 warning (_("Target does not support fast tracepoints, "
12318 "downloading %d as regular tracepoint"), b
->number
);
12320 else if (b
->type
== bp_static_tracepoint
)
12322 /* Only test for support at download time; we may not know
12323 target capabilities at definition time. */
12324 if (remote_supports_static_tracepoints ())
12326 struct static_tracepoint_marker marker
;
12328 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12329 strcat (buf
, ":S");
12331 error (_("Static tracepoint not valid during download"));
12334 /* Fast tracepoints are functionally identical to regular
12335 tracepoints, so don't take lack of support as a reason
12336 to give up on the trace run. */
12337 error (_("Target does not support static tracepoints"));
12339 /* If the tracepoint has a conditional, make it into an agent
12340 expression and append to the definition. */
12343 /* Only test support at download time, we may not know target
12344 capabilities at definition time. */
12345 if (remote_supports_cond_tracepoints ())
12347 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
.get ());
12348 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
12350 pkt
= buf
+ strlen (buf
);
12351 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12352 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12356 warning (_("Target does not support conditional tracepoints, "
12357 "ignoring tp %d cond"), b
->number
);
12360 if (b
->commands
|| *default_collect
)
12363 remote_get_noisy_reply ();
12364 if (strcmp (rs
->buf
, "OK"))
12365 error (_("Target does not support tracepoints."));
12367 /* do_single_steps (t); */
12368 for (auto action_it
= tdp_actions
.begin ();
12369 action_it
!= tdp_actions
.end (); action_it
++)
12371 QUIT
; /* Allow user to bail out with ^C. */
12373 bool has_more
= (action_it
!= tdp_actions
.end ()
12374 || !stepping_actions
.empty ());
12376 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
12377 b
->number
, addrbuf
, /* address */
12378 action_it
->c_str (),
12379 has_more
? '-' : 0);
12381 remote_get_noisy_reply ();
12382 if (strcmp (rs
->buf
, "OK"))
12383 error (_("Error on target while setting tracepoints."));
12386 for (auto action_it
= stepping_actions
.begin ();
12387 action_it
!= stepping_actions
.end (); action_it
++)
12389 QUIT
; /* Allow user to bail out with ^C. */
12391 bool is_first
= action_it
== stepping_actions
.begin ();
12392 bool has_more
= action_it
!= stepping_actions
.end ();
12394 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12395 b
->number
, addrbuf
, /* address */
12396 is_first
? "S" : "",
12397 action_it
->c_str (),
12398 has_more
? "-" : "");
12400 remote_get_noisy_reply ();
12401 if (strcmp (rs
->buf
, "OK"))
12402 error (_("Error on target while setting tracepoints."));
12405 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12407 if (b
->location
!= NULL
)
12409 strcpy (buf
, "QTDPsrc:");
12410 encode_source_string (b
->number
, loc
->address
, "at",
12411 event_location_to_string (b
->location
.get ()),
12412 buf
+ strlen (buf
), 2048 - strlen (buf
));
12414 remote_get_noisy_reply ();
12415 if (strcmp (rs
->buf
, "OK"))
12416 warning (_("Target does not support source download."));
12418 if (b
->cond_string
)
12420 strcpy (buf
, "QTDPsrc:");
12421 encode_source_string (b
->number
, loc
->address
,
12422 "cond", b
->cond_string
, buf
+ strlen (buf
),
12423 2048 - strlen (buf
));
12425 remote_get_noisy_reply ();
12426 if (strcmp (rs
->buf
, "OK"))
12427 warning (_("Target does not support source download."));
12429 remote_download_command_source (b
->number
, loc
->address
,
12430 breakpoint_commands (b
));
12435 remote_can_download_tracepoint (struct target_ops
*self
)
12437 struct remote_state
*rs
= get_remote_state ();
12438 struct trace_status
*ts
;
12441 /* Don't try to install tracepoints until we've relocated our
12442 symbols, and fetched and merged the target's tracepoint list with
12444 if (rs
->starting_up
)
12447 ts
= current_trace_status ();
12448 status
= remote_get_trace_status (self
, ts
);
12450 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12453 /* If we are in a tracing experiment, but remote stub doesn't support
12454 installing tracepoint in trace, we have to return. */
12455 if (!remote_supports_install_in_trace ())
12463 remote_download_trace_state_variable (struct target_ops
*self
,
12464 struct trace_state_variable
*tsv
)
12466 struct remote_state
*rs
= get_remote_state ();
12469 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12470 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8),
12472 p
= rs
->buf
+ strlen (rs
->buf
);
12473 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
12474 error (_("Trace state variable name too long for tsv definition packet"));
12475 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, strlen (tsv
->name
));
12478 remote_get_noisy_reply ();
12479 if (*rs
->buf
== '\0')
12480 error (_("Target does not support this command."));
12481 if (strcmp (rs
->buf
, "OK") != 0)
12482 error (_("Error on target while downloading trace state variable."));
12486 remote_enable_tracepoint (struct target_ops
*self
,
12487 struct bp_location
*location
)
12489 struct remote_state
*rs
= get_remote_state ();
12492 sprintf_vma (addr_buf
, location
->address
);
12493 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12494 location
->owner
->number
, addr_buf
);
12496 remote_get_noisy_reply ();
12497 if (*rs
->buf
== '\0')
12498 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12499 if (strcmp (rs
->buf
, "OK") != 0)
12500 error (_("Error on target while enabling tracepoint."));
12504 remote_disable_tracepoint (struct target_ops
*self
,
12505 struct bp_location
*location
)
12507 struct remote_state
*rs
= get_remote_state ();
12510 sprintf_vma (addr_buf
, location
->address
);
12511 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12512 location
->owner
->number
, addr_buf
);
12514 remote_get_noisy_reply ();
12515 if (*rs
->buf
== '\0')
12516 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12517 if (strcmp (rs
->buf
, "OK") != 0)
12518 error (_("Error on target while disabling tracepoint."));
12522 remote_trace_set_readonly_regions (struct target_ops
*self
)
12526 bfd_size_type size
;
12532 return; /* No information to give. */
12534 struct remote_state
*rs
= get_remote_state ();
12536 strcpy (rs
->buf
, "QTro");
12537 offset
= strlen (rs
->buf
);
12538 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12540 char tmp1
[40], tmp2
[40];
12543 if ((s
->flags
& SEC_LOAD
) == 0 ||
12544 /* (s->flags & SEC_CODE) == 0 || */
12545 (s
->flags
& SEC_READONLY
) == 0)
12549 vma
= bfd_get_section_vma (abfd
, s
);
12550 size
= bfd_get_section_size (s
);
12551 sprintf_vma (tmp1
, vma
);
12552 sprintf_vma (tmp2
, vma
+ size
);
12553 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12554 if (offset
+ sec_length
+ 1 > rs
->buf_size
)
12556 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12558 Too many sections for read-only sections definition packet."));
12561 xsnprintf (rs
->buf
+ offset
, rs
->buf_size
- offset
, ":%s,%s",
12563 offset
+= sec_length
;
12568 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12573 remote_trace_start (struct target_ops
*self
)
12575 struct remote_state
*rs
= get_remote_state ();
12577 putpkt ("QTStart");
12578 remote_get_noisy_reply ();
12579 if (*rs
->buf
== '\0')
12580 error (_("Target does not support this command."));
12581 if (strcmp (rs
->buf
, "OK") != 0)
12582 error (_("Bogus reply from target: %s"), rs
->buf
);
12586 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12588 /* Initialize it just to avoid a GCC false warning. */
12590 /* FIXME we need to get register block size some other way. */
12591 extern int trace_regblock_size
;
12592 enum packet_result result
;
12593 struct remote_state
*rs
= get_remote_state ();
12595 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12598 trace_regblock_size
12599 = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
12601 putpkt ("qTStatus");
12605 p
= remote_get_noisy_reply ();
12607 CATCH (ex
, RETURN_MASK_ERROR
)
12609 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12611 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12614 throw_exception (ex
);
12618 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12620 /* If the remote target doesn't do tracing, flag it. */
12621 if (result
== PACKET_UNKNOWN
)
12624 /* We're working with a live target. */
12625 ts
->filename
= NULL
;
12628 error (_("Bogus trace status reply from target: %s"), rs
->buf
);
12630 /* Function 'parse_trace_status' sets default value of each field of
12631 'ts' at first, so we don't have to do it here. */
12632 parse_trace_status (p
, ts
);
12634 return ts
->running
;
12638 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12639 struct uploaded_tp
*utp
)
12641 struct remote_state
*rs
= get_remote_state ();
12643 struct bp_location
*loc
;
12644 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12645 size_t size
= get_remote_packet_size ();
12650 tp
->traceframe_usage
= 0;
12651 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
12653 /* If the tracepoint was never downloaded, don't go asking for
12655 if (tp
->number_on_target
== 0)
12657 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12658 phex_nz (loc
->address
, 0));
12660 reply
= remote_get_noisy_reply ();
12661 if (reply
&& *reply
)
12664 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12670 utp
->hit_count
= 0;
12671 utp
->traceframe_usage
= 0;
12672 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12673 phex_nz (utp
->addr
, 0));
12675 reply
= remote_get_noisy_reply ();
12676 if (reply
&& *reply
)
12679 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12685 remote_trace_stop (struct target_ops
*self
)
12687 struct remote_state
*rs
= get_remote_state ();
12690 remote_get_noisy_reply ();
12691 if (*rs
->buf
== '\0')
12692 error (_("Target does not support this command."));
12693 if (strcmp (rs
->buf
, "OK") != 0)
12694 error (_("Bogus reply from target: %s"), rs
->buf
);
12698 remote_trace_find (struct target_ops
*self
,
12699 enum trace_find_type type
, int num
,
12700 CORE_ADDR addr1
, CORE_ADDR addr2
,
12703 struct remote_state
*rs
= get_remote_state ();
12704 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12706 int target_frameno
= -1, target_tracept
= -1;
12708 /* Lookups other than by absolute frame number depend on the current
12709 trace selected, so make sure it is correct on the remote end
12711 if (type
!= tfind_number
)
12712 set_remote_traceframe ();
12715 strcpy (p
, "QTFrame:");
12716 p
= strchr (p
, '\0');
12720 xsnprintf (p
, endbuf
- p
, "%x", num
);
12723 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12726 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12729 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12730 phex_nz (addr2
, 0));
12732 case tfind_outside
:
12733 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12734 phex_nz (addr2
, 0));
12737 error (_("Unknown trace find type %d"), type
);
12741 reply
= remote_get_noisy_reply ();
12742 if (*reply
== '\0')
12743 error (_("Target does not support this command."));
12745 while (reply
&& *reply
)
12750 target_frameno
= (int) strtol (p
, &reply
, 16);
12752 error (_("Unable to parse trace frame number"));
12753 /* Don't update our remote traceframe number cache on failure
12754 to select a remote traceframe. */
12755 if (target_frameno
== -1)
12760 target_tracept
= (int) strtol (p
, &reply
, 16);
12762 error (_("Unable to parse tracepoint number"));
12764 case 'O': /* "OK"? */
12765 if (reply
[1] == 'K' && reply
[2] == '\0')
12768 error (_("Bogus reply from target: %s"), reply
);
12771 error (_("Bogus reply from target: %s"), reply
);
12774 *tpp
= target_tracept
;
12776 rs
->remote_traceframe_number
= target_frameno
;
12777 return target_frameno
;
12781 remote_get_trace_state_variable_value (struct target_ops
*self
,
12782 int tsvnum
, LONGEST
*val
)
12784 struct remote_state
*rs
= get_remote_state ();
12788 set_remote_traceframe ();
12790 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12792 reply
= remote_get_noisy_reply ();
12793 if (reply
&& *reply
)
12797 unpack_varlen_hex (reply
+ 1, &uval
);
12798 *val
= (LONGEST
) uval
;
12806 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12808 struct remote_state
*rs
= get_remote_state ();
12812 strcpy (p
, "QTSave:");
12814 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12815 error (_("Remote file name too long for trace save packet"));
12816 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12819 reply
= remote_get_noisy_reply ();
12820 if (*reply
== '\0')
12821 error (_("Target does not support this command."));
12822 if (strcmp (reply
, "OK") != 0)
12823 error (_("Bogus reply from target: %s"), reply
);
12827 /* This is basically a memory transfer, but needs to be its own packet
12828 because we don't know how the target actually organizes its trace
12829 memory, plus we want to be able to ask for as much as possible, but
12830 not be unhappy if we don't get as much as we ask for. */
12833 remote_get_raw_trace_data (struct target_ops
*self
,
12834 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12836 struct remote_state
*rs
= get_remote_state ();
12842 strcpy (p
, "qTBuffer:");
12844 p
+= hexnumstr (p
, offset
);
12846 p
+= hexnumstr (p
, len
);
12850 reply
= remote_get_noisy_reply ();
12851 if (reply
&& *reply
)
12853 /* 'l' by itself means we're at the end of the buffer and
12854 there is nothing more to get. */
12858 /* Convert the reply into binary. Limit the number of bytes to
12859 convert according to our passed-in buffer size, rather than
12860 what was returned in the packet; if the target is
12861 unexpectedly generous and gives us a bigger reply than we
12862 asked for, we don't want to crash. */
12863 rslt
= hex2bin (reply
, buf
, len
);
12867 /* Something went wrong, flag as an error. */
12872 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12874 struct remote_state
*rs
= get_remote_state ();
12876 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12880 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12882 reply
= remote_get_noisy_reply ();
12883 if (*reply
== '\0')
12884 error (_("Target does not support this command."));
12885 if (strcmp (reply
, "OK") != 0)
12886 error (_("Bogus reply from target: %s"), reply
);
12889 warning (_("Target does not support disconnected tracing."));
12893 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12895 struct thread_info
*info
= find_thread_ptid (ptid
);
12897 if (info
!= NULL
&& info
->priv
!= NULL
)
12898 return get_remote_thread_info (info
)->core
;
12904 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12906 struct remote_state
*rs
= get_remote_state ();
12909 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12911 reply
= remote_get_noisy_reply ();
12912 if (*reply
== '\0')
12913 error (_("Target does not support this command."));
12914 if (strcmp (reply
, "OK") != 0)
12915 error (_("Bogus reply from target: %s"), reply
);
12918 static traceframe_info_up
12919 remote_traceframe_info (struct target_ops
*self
)
12921 gdb::unique_xmalloc_ptr
<char> text
12922 = target_read_stralloc (¤t_target
, TARGET_OBJECT_TRACEFRAME_INFO
,
12925 return parse_traceframe_info (text
.get ());
12930 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12931 instruction on which a fast tracepoint may be placed. Returns -1
12932 if the packet is not supported, and 0 if the minimum instruction
12933 length is unknown. */
12936 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
12938 struct remote_state
*rs
= get_remote_state ();
12941 /* If we're not debugging a process yet, the IPA can't be
12943 if (!target_has_execution
)
12946 /* Make sure the remote is pointing at the right process. */
12947 set_general_process ();
12949 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
12951 reply
= remote_get_noisy_reply ();
12952 if (*reply
== '\0')
12956 ULONGEST min_insn_len
;
12958 unpack_varlen_hex (reply
, &min_insn_len
);
12960 return (int) min_insn_len
;
12965 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
12967 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
12969 struct remote_state
*rs
= get_remote_state ();
12970 char *buf
= rs
->buf
;
12971 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12972 enum packet_result result
;
12974 gdb_assert (val
>= 0 || val
== -1);
12975 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
12976 /* Send -1 as literal "-1" to avoid host size dependency. */
12980 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
12983 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
12986 remote_get_noisy_reply ();
12987 result
= packet_ok (rs
->buf
,
12988 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
12990 if (result
!= PACKET_OK
)
12991 warning (_("Bogus reply from target: %s"), rs
->buf
);
12996 remote_set_trace_notes (struct target_ops
*self
,
12997 const char *user
, const char *notes
,
12998 const char *stop_notes
)
13000 struct remote_state
*rs
= get_remote_state ();
13002 char *buf
= rs
->buf
;
13003 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13006 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13009 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13010 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13016 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13017 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13023 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13024 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13028 /* Ensure the buffer is terminated. */
13032 reply
= remote_get_noisy_reply ();
13033 if (*reply
== '\0')
13036 if (strcmp (reply
, "OK") != 0)
13037 error (_("Bogus reply from target: %s"), reply
);
13043 remote_use_agent (struct target_ops
*self
, int use
)
13045 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13047 struct remote_state
*rs
= get_remote_state ();
13049 /* If the stub supports QAgent. */
13050 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13052 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13054 if (strcmp (rs
->buf
, "OK") == 0)
13065 remote_can_use_agent (struct target_ops
*self
)
13067 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13070 struct btrace_target_info
13072 /* The ptid of the traced thread. */
13075 /* The obtained branch trace configuration. */
13076 struct btrace_config conf
;
13079 /* Reset our idea of our target's btrace configuration. */
13082 remote_btrace_reset (void)
13084 struct remote_state
*rs
= get_remote_state ();
13086 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13089 /* Check whether the target supports branch tracing. */
13092 remote_supports_btrace (struct target_ops
*self
, enum btrace_format format
)
13094 if (packet_support (PACKET_Qbtrace_off
) != PACKET_ENABLE
)
13096 if (packet_support (PACKET_qXfer_btrace
) != PACKET_ENABLE
)
13101 case BTRACE_FORMAT_NONE
:
13104 case BTRACE_FORMAT_BTS
:
13105 return (packet_support (PACKET_Qbtrace_bts
) == PACKET_ENABLE
);
13107 case BTRACE_FORMAT_PT
:
13108 /* The trace is decoded on the host. Even if our target supports it,
13109 we still need to have libipt to decode the trace. */
13110 #if defined (HAVE_LIBIPT)
13111 return (packet_support (PACKET_Qbtrace_pt
) == PACKET_ENABLE
);
13112 #else /* !defined (HAVE_LIBIPT) */
13114 #endif /* !defined (HAVE_LIBIPT) */
13117 internal_error (__FILE__
, __LINE__
, _("Unknown branch trace format"));
13120 /* Synchronize the configuration with the target. */
13123 btrace_sync_conf (const struct btrace_config
*conf
)
13125 struct packet_config
*packet
;
13126 struct remote_state
*rs
;
13127 char *buf
, *pos
, *endbuf
;
13129 rs
= get_remote_state ();
13131 endbuf
= buf
+ get_remote_packet_size ();
13133 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13134 if (packet_config_support (packet
) == PACKET_ENABLE
13135 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13138 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13142 getpkt (&buf
, &rs
->buf_size
, 0);
13144 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13146 if (buf
[0] == 'E' && buf
[1] == '.')
13147 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13149 error (_("Failed to configure the BTS buffer size."));
13152 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13155 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13156 if (packet_config_support (packet
) == PACKET_ENABLE
13157 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13160 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13164 getpkt (&buf
, &rs
->buf_size
, 0);
13166 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13168 if (buf
[0] == 'E' && buf
[1] == '.')
13169 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13171 error (_("Failed to configure the trace buffer size."));
13174 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13178 /* Read the current thread's btrace configuration from the target and
13179 store it into CONF. */
13182 btrace_read_config (struct btrace_config
*conf
)
13184 gdb::unique_xmalloc_ptr
<char> xml
13185 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE_CONF
, "");
13187 parse_xml_btrace_conf (conf
, xml
.get ());
13190 /* Maybe reopen target btrace. */
13193 remote_btrace_maybe_reopen (void)
13195 struct remote_state
*rs
= get_remote_state ();
13196 struct thread_info
*tp
;
13197 int btrace_target_pushed
= 0;
13200 scoped_restore_current_thread restore_thread
;
13202 ALL_NON_EXITED_THREADS (tp
)
13204 set_general_thread (tp
->ptid
);
13206 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13207 btrace_read_config (&rs
->btrace_config
);
13209 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13212 #if !defined (HAVE_LIBIPT)
13213 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13218 warning (_("GDB does not support Intel Processor Trace. "
13219 "\"record\" will not work in this session."));
13224 #endif /* !defined (HAVE_LIBIPT) */
13226 /* Push target, once, but before anything else happens. This way our
13227 changes to the threads will be cleaned up by unpushing the target
13228 in case btrace_read_config () throws. */
13229 if (!btrace_target_pushed
)
13231 btrace_target_pushed
= 1;
13232 record_btrace_push_target ();
13233 printf_filtered (_("Target is recording using %s.\n"),
13234 btrace_format_string (rs
->btrace_config
.format
));
13237 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13238 tp
->btrace
.target
->ptid
= tp
->ptid
;
13239 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13243 /* Enable branch tracing. */
13245 static struct btrace_target_info
*
13246 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
13247 const struct btrace_config
*conf
)
13249 struct btrace_target_info
*tinfo
= NULL
;
13250 struct packet_config
*packet
= NULL
;
13251 struct remote_state
*rs
= get_remote_state ();
13252 char *buf
= rs
->buf
;
13253 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13255 switch (conf
->format
)
13257 case BTRACE_FORMAT_BTS
:
13258 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13261 case BTRACE_FORMAT_PT
:
13262 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13266 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13267 error (_("Target does not support branch tracing."));
13269 btrace_sync_conf (conf
);
13271 set_general_thread (ptid
);
13273 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13275 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13277 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13279 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13280 error (_("Could not enable branch tracing for %s: %s"),
13281 target_pid_to_str (ptid
), rs
->buf
+ 2);
13283 error (_("Could not enable branch tracing for %s."),
13284 target_pid_to_str (ptid
));
13287 tinfo
= XCNEW (struct btrace_target_info
);
13288 tinfo
->ptid
= ptid
;
13290 /* If we fail to read the configuration, we lose some information, but the
13291 tracing itself is not impacted. */
13294 btrace_read_config (&tinfo
->conf
);
13296 CATCH (err
, RETURN_MASK_ERROR
)
13298 if (err
.message
!= NULL
)
13299 warning ("%s", err
.message
);
13306 /* Disable branch tracing. */
13309 remote_disable_btrace (struct target_ops
*self
,
13310 struct btrace_target_info
*tinfo
)
13312 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13313 struct remote_state
*rs
= get_remote_state ();
13314 char *buf
= rs
->buf
;
13315 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13317 if (packet_config_support (packet
) != PACKET_ENABLE
)
13318 error (_("Target does not support branch tracing."));
13320 set_general_thread (tinfo
->ptid
);
13322 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13324 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13326 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13328 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13329 error (_("Could not disable branch tracing for %s: %s"),
13330 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13332 error (_("Could not disable branch tracing for %s."),
13333 target_pid_to_str (tinfo
->ptid
));
13339 /* Teardown branch tracing. */
13342 remote_teardown_btrace (struct target_ops
*self
,
13343 struct btrace_target_info
*tinfo
)
13345 /* We must not talk to the target during teardown. */
13349 /* Read the branch trace. */
13351 static enum btrace_error
13352 remote_read_btrace (struct target_ops
*self
,
13353 struct btrace_data
*btrace
,
13354 struct btrace_target_info
*tinfo
,
13355 enum btrace_read_type type
)
13357 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13360 if (packet_config_support (packet
) != PACKET_ENABLE
)
13361 error (_("Target does not support branch tracing."));
13363 #if !defined(HAVE_LIBEXPAT)
13364 error (_("Cannot process branch tracing result. XML parsing not supported."));
13369 case BTRACE_READ_ALL
:
13372 case BTRACE_READ_NEW
:
13375 case BTRACE_READ_DELTA
:
13379 internal_error (__FILE__
, __LINE__
,
13380 _("Bad branch tracing read type: %u."),
13381 (unsigned int) type
);
13384 gdb::unique_xmalloc_ptr
<char> xml
13385 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE
, annex
);
13387 return BTRACE_ERR_UNKNOWN
;
13389 parse_xml_btrace (btrace
, xml
.get ());
13391 return BTRACE_ERR_NONE
;
13394 static const struct btrace_config
*
13395 remote_btrace_conf (struct target_ops
*self
,
13396 const struct btrace_target_info
*tinfo
)
13398 return &tinfo
->conf
;
13402 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
13404 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13408 /* Implementation of to_load. */
13411 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
13413 generic_load (name
, from_tty
);
13416 /* Accepts an integer PID; returns a string representing a file that
13417 can be opened on the remote side to get the symbols for the child
13418 process. Returns NULL if the operation is not supported. */
13421 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13423 static gdb::unique_xmalloc_ptr
<char> filename
;
13424 struct inferior
*inf
;
13425 char *annex
= NULL
;
13427 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13430 inf
= find_inferior_pid (pid
);
13432 internal_error (__FILE__
, __LINE__
,
13433 _("not currently attached to process %d"), pid
);
13435 if (!inf
->fake_pid_p
)
13437 const int annex_size
= 9;
13439 annex
= (char *) alloca (annex_size
);
13440 xsnprintf (annex
, annex_size
, "%x", pid
);
13443 filename
= target_read_stralloc (¤t_target
,
13444 TARGET_OBJECT_EXEC_FILE
, annex
);
13446 return filename
.get ();
13449 /* Implement the to_can_do_single_step target_ops method. */
13452 remote_can_do_single_step (struct target_ops
*ops
)
13454 /* We can only tell whether target supports single step or not by
13455 supported s and S vCont actions if the stub supports vContSupported
13456 feature. If the stub doesn't support vContSupported feature,
13457 we have conservatively to think target doesn't supports single
13459 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13461 struct remote_state
*rs
= get_remote_state ();
13463 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13464 remote_vcont_probe (rs
);
13466 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13472 /* Implementation of the to_execution_direction method for the remote
13475 static enum exec_direction_kind
13476 remote_execution_direction (struct target_ops
*self
)
13478 struct remote_state
*rs
= get_remote_state ();
13480 return rs
->last_resume_exec_dir
;
13483 /* Return pointer to the thread_info struct which corresponds to
13484 THREAD_HANDLE (having length HANDLE_LEN). */
13486 static struct thread_info
*
13487 remote_thread_handle_to_thread_info (struct target_ops
*ops
,
13488 const gdb_byte
*thread_handle
,
13490 struct inferior
*inf
)
13492 struct thread_info
*tp
;
13494 ALL_NON_EXITED_THREADS (tp
)
13496 remote_thread_info
*priv
= get_remote_thread_info (tp
);
13498 if (tp
->inf
== inf
&& priv
!= NULL
)
13500 if (handle_len
!= priv
->thread_handle
.size ())
13501 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13502 handle_len
, priv
->thread_handle
.size ());
13503 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
13513 init_remote_ops (void)
13515 remote_ops
.to_shortname
= "remote";
13516 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13517 remote_ops
.to_doc
=
13518 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13519 Specify the serial device it is connected to\n\
13520 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13521 remote_ops
.to_open
= remote_open
;
13522 remote_ops
.to_close
= remote_close
;
13523 remote_ops
.to_detach
= remote_detach
;
13524 remote_ops
.to_disconnect
= remote_disconnect
;
13525 remote_ops
.to_resume
= remote_resume
;
13526 remote_ops
.to_commit_resume
= remote_commit_resume
;
13527 remote_ops
.to_wait
= remote_wait
;
13528 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13529 remote_ops
.to_store_registers
= remote_store_registers
;
13530 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13531 remote_ops
.to_files_info
= remote_files_info
;
13532 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13533 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13534 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13535 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13536 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13537 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13538 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13539 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13540 remote_ops
.to_watchpoint_addr_within_range
=
13541 remote_watchpoint_addr_within_range
;
13542 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13543 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13544 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13545 remote_ops
.to_region_ok_for_hw_watchpoint
13546 = remote_region_ok_for_hw_watchpoint
;
13547 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13548 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13549 remote_ops
.to_kill
= remote_kill
;
13550 remote_ops
.to_load
= remote_load
;
13551 remote_ops
.to_mourn_inferior
= remote_mourn
;
13552 remote_ops
.to_pass_signals
= remote_pass_signals
;
13553 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13554 remote_ops
.to_program_signals
= remote_program_signals
;
13555 remote_ops
.to_thread_alive
= remote_thread_alive
;
13556 remote_ops
.to_thread_name
= remote_thread_name
;
13557 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13558 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13559 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13560 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13561 remote_ops
.to_stop
= remote_stop
;
13562 remote_ops
.to_interrupt
= remote_interrupt
;
13563 remote_ops
.to_pass_ctrlc
= remote_pass_ctrlc
;
13564 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13565 remote_ops
.to_get_memory_xfer_limit
= remote_get_memory_xfer_limit
;
13566 remote_ops
.to_rcmd
= remote_rcmd
;
13567 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13568 remote_ops
.to_log_command
= serial_log_command
;
13569 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13570 remote_ops
.to_stratum
= process_stratum
;
13571 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13572 remote_ops
.to_has_memory
= default_child_has_memory
;
13573 remote_ops
.to_has_stack
= default_child_has_stack
;
13574 remote_ops
.to_has_registers
= default_child_has_registers
;
13575 remote_ops
.to_has_execution
= default_child_has_execution
;
13576 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13577 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13578 remote_ops
.to_magic
= OPS_MAGIC
;
13579 remote_ops
.to_memory_map
= remote_memory_map
;
13580 remote_ops
.to_flash_erase
= remote_flash_erase
;
13581 remote_ops
.to_flash_done
= remote_flash_done
;
13582 remote_ops
.to_read_description
= remote_read_description
;
13583 remote_ops
.to_search_memory
= remote_search_memory
;
13584 remote_ops
.to_can_async_p
= remote_can_async_p
;
13585 remote_ops
.to_is_async_p
= remote_is_async_p
;
13586 remote_ops
.to_async
= remote_async
;
13587 remote_ops
.to_thread_events
= remote_thread_events
;
13588 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13589 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13590 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13591 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13592 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13593 remote_ops
.to_supports_disable_randomization
13594 = remote_supports_disable_randomization
;
13595 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13596 remote_ops
.to_fileio_open
= remote_hostio_open
;
13597 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13598 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13599 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13600 remote_ops
.to_fileio_close
= remote_hostio_close
;
13601 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13602 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13603 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13604 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13605 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13606 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13607 remote_ops
.to_trace_init
= remote_trace_init
;
13608 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13609 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13610 remote_ops
.to_download_trace_state_variable
13611 = remote_download_trace_state_variable
;
13612 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13613 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13614 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13615 remote_ops
.to_trace_start
= remote_trace_start
;
13616 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13617 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13618 remote_ops
.to_trace_stop
= remote_trace_stop
;
13619 remote_ops
.to_trace_find
= remote_trace_find
;
13620 remote_ops
.to_get_trace_state_variable_value
13621 = remote_get_trace_state_variable_value
;
13622 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13623 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13624 remote_ops
.to_upload_trace_state_variables
13625 = remote_upload_trace_state_variables
;
13626 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13627 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13628 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13629 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13630 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13631 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13632 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13633 remote_ops
.to_verify_memory
= remote_verify_memory
;
13634 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13635 remote_ops
.to_set_permissions
= remote_set_permissions
;
13636 remote_ops
.to_static_tracepoint_marker_at
13637 = remote_static_tracepoint_marker_at
;
13638 remote_ops
.to_static_tracepoint_markers_by_strid
13639 = remote_static_tracepoint_markers_by_strid
;
13640 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13641 remote_ops
.to_use_agent
= remote_use_agent
;
13642 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13643 remote_ops
.to_supports_btrace
= remote_supports_btrace
;
13644 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13645 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13646 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13647 remote_ops
.to_read_btrace
= remote_read_btrace
;
13648 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13649 remote_ops
.to_augmented_libraries_svr4_read
=
13650 remote_augmented_libraries_svr4_read
;
13651 remote_ops
.to_follow_fork
= remote_follow_fork
;
13652 remote_ops
.to_follow_exec
= remote_follow_exec
;
13653 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13654 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13655 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13656 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13657 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13658 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13659 remote_ops
.to_execution_direction
= remote_execution_direction
;
13660 remote_ops
.to_thread_handle_to_thread_info
=
13661 remote_thread_handle_to_thread_info
;
13664 /* Set up the extended remote vector by making a copy of the standard
13665 remote vector and adding to it. */
13668 init_extended_remote_ops (void)
13670 extended_remote_ops
= remote_ops
;
13672 extended_remote_ops
.to_shortname
= "extended-remote";
13673 extended_remote_ops
.to_longname
=
13674 "Extended remote serial target in gdb-specific protocol";
13675 extended_remote_ops
.to_doc
=
13676 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13677 Specify the serial device it is connected to (e.g. /dev/ttya).";
13678 extended_remote_ops
.to_open
= extended_remote_open
;
13679 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13680 extended_remote_ops
.to_detach
= extended_remote_detach
;
13681 extended_remote_ops
.to_attach
= extended_remote_attach
;
13682 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13683 extended_remote_ops
.to_supports_disable_randomization
13684 = extended_remote_supports_disable_randomization
;
13688 remote_can_async_p (struct target_ops
*ops
)
13690 struct remote_state
*rs
= get_remote_state ();
13692 /* We don't go async if the user has explicitly prevented it with the
13693 "maint set target-async" command. */
13694 if (!target_async_permitted
)
13697 /* We're async whenever the serial device is. */
13698 return serial_can_async_p (rs
->remote_desc
);
13702 remote_is_async_p (struct target_ops
*ops
)
13704 struct remote_state
*rs
= get_remote_state ();
13706 if (!target_async_permitted
)
13707 /* We only enable async when the user specifically asks for it. */
13710 /* We're async whenever the serial device is. */
13711 return serial_is_async_p (rs
->remote_desc
);
13714 /* Pass the SERIAL event on and up to the client. One day this code
13715 will be able to delay notifying the client of an event until the
13716 point where an entire packet has been received. */
13718 static serial_event_ftype remote_async_serial_handler
;
13721 remote_async_serial_handler (struct serial
*scb
, void *context
)
13723 /* Don't propogate error information up to the client. Instead let
13724 the client find out about the error by querying the target. */
13725 inferior_event_handler (INF_REG_EVENT
, NULL
);
13729 remote_async_inferior_event_handler (gdb_client_data data
)
13731 inferior_event_handler (INF_REG_EVENT
, NULL
);
13735 remote_async (struct target_ops
*ops
, int enable
)
13737 struct remote_state
*rs
= get_remote_state ();
13741 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13743 /* If there are pending events in the stop reply queue tell the
13744 event loop to process them. */
13745 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13746 mark_async_event_handler (remote_async_inferior_event_token
);
13747 /* For simplicity, below we clear the pending events token
13748 without remembering whether it is marked, so here we always
13749 mark it. If there's actually no pending notification to
13750 process, this ends up being a no-op (other than a spurious
13751 event-loop wakeup). */
13752 if (target_is_non_stop_p ())
13753 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13757 serial_async (rs
->remote_desc
, NULL
, NULL
);
13758 /* If the core is disabling async, it doesn't want to be
13759 disturbed with target events. Clear all async event sources
13761 clear_async_event_handler (remote_async_inferior_event_token
);
13762 if (target_is_non_stop_p ())
13763 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13767 /* Implementation of the to_thread_events method. */
13770 remote_thread_events (struct target_ops
*ops
, int enable
)
13772 struct remote_state
*rs
= get_remote_state ();
13773 size_t size
= get_remote_packet_size ();
13775 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13778 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13780 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13782 switch (packet_ok (rs
->buf
,
13783 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13786 if (strcmp (rs
->buf
, "OK") != 0)
13787 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13790 warning (_("Remote failure reply: %s"), rs
->buf
);
13792 case PACKET_UNKNOWN
:
13798 set_remote_cmd (const char *args
, int from_tty
)
13800 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13804 show_remote_cmd (const char *args
, int from_tty
)
13806 /* We can't just use cmd_show_list here, because we want to skip
13807 the redundant "show remote Z-packet" and the legacy aliases. */
13808 struct cmd_list_element
*list
= remote_show_cmdlist
;
13809 struct ui_out
*uiout
= current_uiout
;
13811 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
13812 for (; list
!= NULL
; list
= list
->next
)
13813 if (strcmp (list
->name
, "Z-packet") == 0)
13815 else if (list
->type
== not_set_cmd
)
13816 /* Alias commands are exactly like the original, except they
13817 don't have the normal type. */
13821 ui_out_emit_tuple
option_emitter (uiout
, "option");
13823 uiout
->field_string ("name", list
->name
);
13824 uiout
->text (": ");
13825 if (list
->type
== show_cmd
)
13826 do_show_command (NULL
, from_tty
, list
);
13828 cmd_func (list
, NULL
, from_tty
);
13833 /* Function to be called whenever a new objfile (shlib) is detected. */
13835 remote_new_objfile (struct objfile
*objfile
)
13837 struct remote_state
*rs
= get_remote_state ();
13839 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13840 remote_check_symbols ();
13843 /* Pull all the tracepoints defined on the target and create local
13844 data structures representing them. We don't want to create real
13845 tracepoints yet, we don't want to mess up the user's existing
13849 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13851 struct remote_state
*rs
= get_remote_state ();
13854 /* Ask for a first packet of tracepoint definition. */
13856 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13858 while (*p
&& *p
!= 'l')
13860 parse_tracepoint_definition (p
, utpp
);
13861 /* Ask for another packet of tracepoint definition. */
13863 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13870 remote_upload_trace_state_variables (struct target_ops
*self
,
13871 struct uploaded_tsv
**utsvp
)
13873 struct remote_state
*rs
= get_remote_state ();
13876 /* Ask for a first packet of variable definition. */
13878 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13880 while (*p
&& *p
!= 'l')
13882 parse_tsv_definition (p
, utsvp
);
13883 /* Ask for another packet of variable definition. */
13885 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13891 /* The "set/show range-stepping" show hook. */
13894 show_range_stepping (struct ui_file
*file
, int from_tty
,
13895 struct cmd_list_element
*c
,
13898 fprintf_filtered (file
,
13899 _("Debugger's willingness to use range stepping "
13900 "is %s.\n"), value
);
13903 /* The "set/show range-stepping" set hook. */
13906 set_range_stepping (const char *ignore_args
, int from_tty
,
13907 struct cmd_list_element
*c
)
13909 struct remote_state
*rs
= get_remote_state ();
13911 /* Whene enabling, check whether range stepping is actually
13912 supported by the target, and warn if not. */
13913 if (use_range_stepping
)
13915 if (rs
->remote_desc
!= NULL
)
13917 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13918 remote_vcont_probe (rs
);
13920 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13921 && rs
->supports_vCont
.r
)
13925 warning (_("Range stepping is not supported by the current target"));
13930 _initialize_remote (void)
13932 struct cmd_list_element
*cmd
;
13933 const char *cmd_name
;
13935 /* architecture specific data */
13936 remote_gdbarch_data_handle
=
13937 gdbarch_data_register_post_init (init_remote_state
);
13938 remote_g_packet_data_handle
=
13939 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
13942 = register_program_space_data_with_cleanup (NULL
,
13943 remote_pspace_data_cleanup
);
13945 /* Initialize the per-target state. At the moment there is only one
13946 of these, not one per target. Only one target is active at a
13948 remote_state
= new_remote_state ();
13950 init_remote_ops ();
13951 add_target (&remote_ops
);
13953 init_extended_remote_ops ();
13954 add_target (&extended_remote_ops
);
13956 /* Hook into new objfile notification. */
13957 observer_attach_new_objfile (remote_new_objfile
);
13958 /* We're no longer interested in notification events of an inferior
13960 observer_attach_inferior_exit (discard_pending_stop_replies
);
13963 init_remote_threadtests ();
13966 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
13967 /* set/show remote ... */
13969 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
13970 Remote protocol specific variables\n\
13971 Configure various remote-protocol specific variables such as\n\
13972 the packets being used"),
13973 &remote_set_cmdlist
, "set remote ",
13974 0 /* allow-unknown */, &setlist
);
13975 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
13976 Remote protocol specific variables\n\
13977 Configure various remote-protocol specific variables such as\n\
13978 the packets being used"),
13979 &remote_show_cmdlist
, "show remote ",
13980 0 /* allow-unknown */, &showlist
);
13982 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
13983 Compare section data on target to the exec file.\n\
13984 Argument is a single section name (default: all loaded sections).\n\
13985 To compare only read-only loaded sections, specify the -r option."),
13988 add_cmd ("packet", class_maintenance
, packet_command
, _("\
13989 Send an arbitrary packet to a remote target.\n\
13990 maintenance packet TEXT\n\
13991 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13992 this command sends the string TEXT to the inferior, and displays the\n\
13993 response packet. GDB supplies the initial `$' character, and the\n\
13994 terminating `#' character and checksum."),
13997 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
13998 Set whether to send break if interrupted."), _("\
13999 Show whether to send break if interrupted."), _("\
14000 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14001 set_remotebreak
, show_remotebreak
,
14002 &setlist
, &showlist
);
14003 cmd_name
= "remotebreak";
14004 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
14005 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14006 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14007 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
14008 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14010 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14011 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14013 Set interrupt sequence to remote target."), _("\
14014 Show interrupt sequence to remote target."), _("\
14015 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14016 NULL
, show_interrupt_sequence
,
14017 &remote_set_cmdlist
,
14018 &remote_show_cmdlist
);
14020 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14021 &interrupt_on_connect
, _("\
14022 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14023 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14024 If set, interrupt sequence is sent to remote target."),
14026 &remote_set_cmdlist
, &remote_show_cmdlist
);
14028 /* Install commands for configuring memory read/write packets. */
14030 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14031 Set the maximum number of bytes per memory write packet (deprecated)."),
14033 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14034 Show the maximum number of bytes per memory write packet (deprecated)."),
14036 add_cmd ("memory-write-packet-size", no_class
,
14037 set_memory_write_packet_size
, _("\
14038 Set the maximum number of bytes per memory-write packet.\n\
14039 Specify the number of bytes in a packet or 0 (zero) for the\n\
14040 default packet size. The actual limit is further reduced\n\
14041 dependent on the target. Specify ``fixed'' to disable the\n\
14042 further restriction and ``limit'' to enable that restriction."),
14043 &remote_set_cmdlist
);
14044 add_cmd ("memory-read-packet-size", no_class
,
14045 set_memory_read_packet_size
, _("\
14046 Set the maximum number of bytes per memory-read packet.\n\
14047 Specify the number of bytes in a packet or 0 (zero) for the\n\
14048 default packet size. The actual limit is further reduced\n\
14049 dependent on the target. Specify ``fixed'' to disable the\n\
14050 further restriction and ``limit'' to enable that restriction."),
14051 &remote_set_cmdlist
);
14052 add_cmd ("memory-write-packet-size", no_class
,
14053 show_memory_write_packet_size
,
14054 _("Show the maximum number of bytes per memory-write packet."),
14055 &remote_show_cmdlist
);
14056 add_cmd ("memory-read-packet-size", no_class
,
14057 show_memory_read_packet_size
,
14058 _("Show the maximum number of bytes per memory-read packet."),
14059 &remote_show_cmdlist
);
14061 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
14062 &remote_hw_watchpoint_limit
, _("\
14063 Set the maximum number of target hardware watchpoints."), _("\
14064 Show the maximum number of target hardware watchpoints."), _("\
14065 Specify a negative limit for unlimited."),
14066 NULL
, NULL
, /* FIXME: i18n: The maximum
14067 number of target hardware
14068 watchpoints is %s. */
14069 &remote_set_cmdlist
, &remote_show_cmdlist
);
14070 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
14071 &remote_hw_watchpoint_length_limit
, _("\
14072 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14073 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14074 Specify a negative limit for unlimited."),
14075 NULL
, NULL
, /* FIXME: i18n: The maximum
14076 length (in bytes) of a target
14077 hardware watchpoint is %s. */
14078 &remote_set_cmdlist
, &remote_show_cmdlist
);
14079 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
14080 &remote_hw_breakpoint_limit
, _("\
14081 Set the maximum number of target hardware breakpoints."), _("\
14082 Show the maximum number of target hardware breakpoints."), _("\
14083 Specify a negative limit for unlimited."),
14084 NULL
, NULL
, /* FIXME: i18n: The maximum
14085 number of target hardware
14086 breakpoints is %s. */
14087 &remote_set_cmdlist
, &remote_show_cmdlist
);
14089 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14090 &remote_address_size
, _("\
14091 Set the maximum size of the address (in bits) in a memory packet."), _("\
14092 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14094 NULL
, /* FIXME: i18n: */
14095 &setlist
, &showlist
);
14097 init_all_packet_configs ();
14099 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14100 "X", "binary-download", 1);
14102 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14103 "vCont", "verbose-resume", 0);
14105 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14106 "QPassSignals", "pass-signals", 0);
14108 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14109 "QCatchSyscalls", "catch-syscalls", 0);
14111 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14112 "QProgramSignals", "program-signals", 0);
14114 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14115 "QSetWorkingDir", "set-working-dir", 0);
14117 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14118 "QStartupWithShell", "startup-with-shell", 0);
14120 add_packet_config_cmd (&remote_protocol_packets
14121 [PACKET_QEnvironmentHexEncoded
],
14122 "QEnvironmentHexEncoded", "environment-hex-encoded",
14125 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14126 "QEnvironmentReset", "environment-reset",
14129 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14130 "QEnvironmentUnset", "environment-unset",
14133 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14134 "qSymbol", "symbol-lookup", 0);
14136 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14137 "P", "set-register", 1);
14139 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14140 "p", "fetch-register", 1);
14142 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14143 "Z0", "software-breakpoint", 0);
14145 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14146 "Z1", "hardware-breakpoint", 0);
14148 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14149 "Z2", "write-watchpoint", 0);
14151 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14152 "Z3", "read-watchpoint", 0);
14154 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14155 "Z4", "access-watchpoint", 0);
14157 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14158 "qXfer:auxv:read", "read-aux-vector", 0);
14160 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14161 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14163 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14164 "qXfer:features:read", "target-features", 0);
14166 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14167 "qXfer:libraries:read", "library-info", 0);
14169 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14170 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14172 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14173 "qXfer:memory-map:read", "memory-map", 0);
14175 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14176 "qXfer:spu:read", "read-spu-object", 0);
14178 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14179 "qXfer:spu:write", "write-spu-object", 0);
14181 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14182 "qXfer:osdata:read", "osdata", 0);
14184 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14185 "qXfer:threads:read", "threads", 0);
14187 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14188 "qXfer:siginfo:read", "read-siginfo-object", 0);
14190 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14191 "qXfer:siginfo:write", "write-siginfo-object", 0);
14193 add_packet_config_cmd
14194 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14195 "qXfer:traceframe-info:read", "traceframe-info", 0);
14197 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14198 "qXfer:uib:read", "unwind-info-block", 0);
14200 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14201 "qGetTLSAddr", "get-thread-local-storage-address",
14204 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14205 "qGetTIBAddr", "get-thread-information-block-address",
14208 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14209 "bc", "reverse-continue", 0);
14211 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14212 "bs", "reverse-step", 0);
14214 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14215 "qSupported", "supported-packets", 0);
14217 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14218 "qSearch:memory", "search-memory", 0);
14220 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14221 "qTStatus", "trace-status", 0);
14223 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14224 "vFile:setfs", "hostio-setfs", 0);
14226 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14227 "vFile:open", "hostio-open", 0);
14229 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14230 "vFile:pread", "hostio-pread", 0);
14232 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14233 "vFile:pwrite", "hostio-pwrite", 0);
14235 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14236 "vFile:close", "hostio-close", 0);
14238 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14239 "vFile:unlink", "hostio-unlink", 0);
14241 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14242 "vFile:readlink", "hostio-readlink", 0);
14244 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14245 "vFile:fstat", "hostio-fstat", 0);
14247 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14248 "vAttach", "attach", 0);
14250 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14253 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14254 "QStartNoAckMode", "noack", 0);
14256 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14257 "vKill", "kill", 0);
14259 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14260 "qAttached", "query-attached", 0);
14262 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14263 "ConditionalTracepoints",
14264 "conditional-tracepoints", 0);
14266 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14267 "ConditionalBreakpoints",
14268 "conditional-breakpoints", 0);
14270 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14271 "BreakpointCommands",
14272 "breakpoint-commands", 0);
14274 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14275 "FastTracepoints", "fast-tracepoints", 0);
14277 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14278 "TracepointSource", "TracepointSource", 0);
14280 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14281 "QAllow", "allow", 0);
14283 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14284 "StaticTracepoints", "static-tracepoints", 0);
14286 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14287 "InstallInTrace", "install-in-trace", 0);
14289 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14290 "qXfer:statictrace:read", "read-sdata-object", 0);
14292 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14293 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14295 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14296 "QDisableRandomization", "disable-randomization", 0);
14298 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14299 "QAgent", "agent", 0);
14301 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14302 "QTBuffer:size", "trace-buffer-size", 0);
14304 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14305 "Qbtrace:off", "disable-btrace", 0);
14307 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14308 "Qbtrace:bts", "enable-btrace-bts", 0);
14310 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14311 "Qbtrace:pt", "enable-btrace-pt", 0);
14313 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14314 "qXfer:btrace", "read-btrace", 0);
14316 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14317 "qXfer:btrace-conf", "read-btrace-conf", 0);
14319 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14320 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14322 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14323 "multiprocess-feature", "multiprocess-feature", 0);
14325 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14326 "swbreak-feature", "swbreak-feature", 0);
14328 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14329 "hwbreak-feature", "hwbreak-feature", 0);
14331 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14332 "fork-event-feature", "fork-event-feature", 0);
14334 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14335 "vfork-event-feature", "vfork-event-feature", 0);
14337 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14338 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14340 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14341 "vContSupported", "verbose-resume-supported", 0);
14343 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14344 "exec-event-feature", "exec-event-feature", 0);
14346 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14347 "vCtrlC", "ctrl-c", 0);
14349 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14350 "QThreadEvents", "thread-events", 0);
14352 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14353 "N stop reply", "no-resumed-stop-reply", 0);
14355 /* Assert that we've registered "set remote foo-packet" commands
14356 for all packet configs. */
14360 for (i
= 0; i
< PACKET_MAX
; i
++)
14362 /* Ideally all configs would have a command associated. Some
14363 still don't though. */
14368 case PACKET_QNonStop
:
14369 case PACKET_EnableDisableTracepoints_feature
:
14370 case PACKET_tracenz_feature
:
14371 case PACKET_DisconnectedTracing_feature
:
14372 case PACKET_augmented_libraries_svr4_read_feature
:
14374 /* Additions to this list need to be well justified:
14375 pre-existing packets are OK; new packets are not. */
14383 /* This catches both forgetting to add a config command, and
14384 forgetting to remove a packet from the exception list. */
14385 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14389 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14390 Z sub-packet has its own set and show commands, but users may
14391 have sets to this variable in their .gdbinit files (or in their
14393 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14394 &remote_Z_packet_detect
, _("\
14395 Set use of remote protocol `Z' packets"), _("\
14396 Show use of remote protocol `Z' packets "), _("\
14397 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14399 set_remote_protocol_Z_packet_cmd
,
14400 show_remote_protocol_Z_packet_cmd
,
14401 /* FIXME: i18n: Use of remote protocol
14402 `Z' packets is %s. */
14403 &remote_set_cmdlist
, &remote_show_cmdlist
);
14405 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14406 Manipulate files on the remote system\n\
14407 Transfer files to and from the remote target system."),
14408 &remote_cmdlist
, "remote ",
14409 0 /* allow-unknown */, &cmdlist
);
14411 add_cmd ("put", class_files
, remote_put_command
,
14412 _("Copy a local file to the remote system."),
14415 add_cmd ("get", class_files
, remote_get_command
,
14416 _("Copy a remote file to the local system."),
14419 add_cmd ("delete", class_files
, remote_delete_command
,
14420 _("Delete a remote file."),
14423 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14424 &remote_exec_file_var
, _("\
14425 Set the remote pathname for \"run\""), _("\
14426 Show the remote pathname for \"run\""), NULL
,
14427 set_remote_exec_file
,
14428 show_remote_exec_file
,
14429 &remote_set_cmdlist
,
14430 &remote_show_cmdlist
);
14432 add_setshow_boolean_cmd ("range-stepping", class_run
,
14433 &use_range_stepping
, _("\
14434 Enable or disable range stepping."), _("\
14435 Show whether target-assisted range stepping is enabled."), _("\
14436 If on, and the target supports it, when stepping a source line, GDB\n\
14437 tells the target to step the corresponding range of addresses itself instead\n\
14438 of issuing multiple single-steps. This speeds up source level\n\
14439 stepping. If off, GDB always issues single-steps, even if range\n\
14440 stepping is supported by the target. The default is on."),
14441 set_range_stepping
,
14442 show_range_stepping
,
14446 /* Eventually initialize fileio. See fileio.c */
14447 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14449 /* Take advantage of the fact that the TID field is not used, to tag
14450 special ptids with it set to != 0. */
14451 magic_null_ptid
= ptid_build (42000, -1, 1);
14452 not_sent_ptid
= ptid_build (42000, -2, 1);
14453 any_thread_ptid
= ptid_build (42000, 0, 1);