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 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
4750 q
= remote_query_supported_append (q
, remote_support_xml
);
4752 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4755 do_cleanups (old_chain
);
4757 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4759 /* If an error occured, warn, but do not return - just reset the
4760 buffer to empty and go on to disable features. */
4761 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4764 warning (_("Remote failure reply: %s"), rs
->buf
);
4769 memset (seen
, 0, sizeof (seen
));
4774 enum packet_support is_supported
;
4775 char *p
, *end
, *name_end
, *value
;
4777 /* First separate out this item from the rest of the packet. If
4778 there's another item after this, we overwrite the separator
4779 (terminated strings are much easier to work with). */
4781 end
= strchr (p
, ';');
4784 end
= p
+ strlen (p
);
4794 warning (_("empty item in \"qSupported\" response"));
4799 name_end
= strchr (p
, '=');
4802 /* This is a name=value entry. */
4803 is_supported
= PACKET_ENABLE
;
4804 value
= name_end
+ 1;
4813 is_supported
= PACKET_ENABLE
;
4817 is_supported
= PACKET_DISABLE
;
4821 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4825 warning (_("unrecognized item \"%s\" "
4826 "in \"qSupported\" response"), p
);
4832 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4833 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4835 const struct protocol_feature
*feature
;
4838 feature
= &remote_protocol_features
[i
];
4839 feature
->func (feature
, is_supported
, value
);
4844 /* If we increased the packet size, make sure to increase the global
4845 buffer size also. We delay this until after parsing the entire
4846 qSupported packet, because this is the same buffer we were
4848 if (rs
->buf_size
< rs
->explicit_packet_size
)
4850 rs
->buf_size
= rs
->explicit_packet_size
;
4851 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4854 /* Handle the defaults for unmentioned features. */
4855 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4858 const struct protocol_feature
*feature
;
4860 feature
= &remote_protocol_features
[i
];
4861 feature
->func (feature
, feature
->default_support
, NULL
);
4865 /* Serial QUIT handler for the remote serial descriptor.
4867 Defers handling a Ctrl-C until we're done with the current
4868 command/response packet sequence, unless:
4870 - We're setting up the connection. Don't send a remote interrupt
4871 request, as we're not fully synced yet. Quit immediately
4874 - The target has been resumed in the foreground
4875 (target_terminal::is_ours is false) with a synchronous resume
4876 packet, and we're blocked waiting for the stop reply, thus a
4877 Ctrl-C should be immediately sent to the target.
4879 - We get a second Ctrl-C while still within the same serial read or
4880 write. In that case the serial is seemingly wedged --- offer to
4883 - We see a second Ctrl-C without target response, after having
4884 previously interrupted the target. In that case the target/stub
4885 is probably wedged --- offer to quit/disconnect.
4889 remote_serial_quit_handler (void)
4891 struct remote_state
*rs
= get_remote_state ();
4893 if (check_quit_flag ())
4895 /* If we're starting up, we're not fully synced yet. Quit
4897 if (rs
->starting_up
)
4899 else if (rs
->got_ctrlc_during_io
)
4901 if (query (_("The target is not responding to GDB commands.\n"
4902 "Stop debugging it? ")))
4903 remote_unpush_and_throw ();
4905 /* If ^C has already been sent once, offer to disconnect. */
4906 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
4908 /* All-stop protocol, and blocked waiting for stop reply. Send
4909 an interrupt request. */
4910 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
4911 target_interrupt (inferior_ptid
);
4913 rs
->got_ctrlc_during_io
= 1;
4917 /* Remove any of the remote.c targets from target stack. Upper targets depend
4918 on it so remove them first. */
4921 remote_unpush_target (void)
4923 pop_all_targets_at_and_above (process_stratum
);
4927 remote_unpush_and_throw (void)
4929 remote_unpush_target ();
4930 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
4934 remote_open_1 (const char *name
, int from_tty
,
4935 struct target_ops
*target
, int extended_p
)
4937 struct remote_state
*rs
= get_remote_state ();
4940 error (_("To open a remote debug connection, you need to specify what\n"
4941 "serial device is attached to the remote system\n"
4942 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4944 /* See FIXME above. */
4945 if (!target_async_permitted
)
4946 wait_forever_enabled_p
= 1;
4948 /* If we're connected to a running target, target_preopen will kill it.
4949 Ask this question first, before target_preopen has a chance to kill
4951 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
4954 && !query (_("Already connected to a remote target. Disconnect? ")))
4955 error (_("Still connected."));
4958 /* Here the possibly existing remote target gets unpushed. */
4959 target_preopen (from_tty
);
4961 /* Make sure we send the passed signals list the next time we resume. */
4962 xfree (rs
->last_pass_packet
);
4963 rs
->last_pass_packet
= NULL
;
4965 /* Make sure we send the program signals list the next time we
4967 xfree (rs
->last_program_signals_packet
);
4968 rs
->last_program_signals_packet
= NULL
;
4970 remote_fileio_reset ();
4971 reopen_exec_file ();
4974 rs
->remote_desc
= remote_serial_open (name
);
4975 if (!rs
->remote_desc
)
4976 perror_with_name (name
);
4978 if (baud_rate
!= -1)
4980 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
4982 /* The requested speed could not be set. Error out to
4983 top level after closing remote_desc. Take care to
4984 set remote_desc to NULL to avoid closing remote_desc
4986 serial_close (rs
->remote_desc
);
4987 rs
->remote_desc
= NULL
;
4988 perror_with_name (name
);
4992 serial_setparity (rs
->remote_desc
, serial_parity
);
4993 serial_raw (rs
->remote_desc
);
4995 /* If there is something sitting in the buffer we might take it as a
4996 response to a command, which would be bad. */
4997 serial_flush_input (rs
->remote_desc
);
5001 puts_filtered ("Remote debugging using ");
5002 puts_filtered (name
);
5003 puts_filtered ("\n");
5005 push_target (target
); /* Switch to using remote target now. */
5007 /* Register extra event sources in the event loop. */
5008 remote_async_inferior_event_token
5009 = create_async_event_handler (remote_async_inferior_event_handler
,
5011 rs
->notif_state
= remote_notif_state_allocate ();
5013 /* Reset the target state; these things will be queried either by
5014 remote_query_supported or as they are needed. */
5015 reset_all_packet_configs_support ();
5016 rs
->cached_wait_status
= 0;
5017 rs
->explicit_packet_size
= 0;
5019 rs
->extended
= extended_p
;
5020 rs
->waiting_for_stop_reply
= 0;
5021 rs
->ctrlc_pending_p
= 0;
5022 rs
->got_ctrlc_during_io
= 0;
5024 rs
->general_thread
= not_sent_ptid
;
5025 rs
->continue_thread
= not_sent_ptid
;
5026 rs
->remote_traceframe_number
= -1;
5028 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5030 /* Probe for ability to use "ThreadInfo" query, as required. */
5031 rs
->use_threadinfo_query
= 1;
5032 rs
->use_threadextra_query
= 1;
5034 readahead_cache_invalidate ();
5036 if (target_async_permitted
)
5038 /* FIXME: cagney/1999-09-23: During the initial connection it is
5039 assumed that the target is already ready and able to respond to
5040 requests. Unfortunately remote_start_remote() eventually calls
5041 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5042 around this. Eventually a mechanism that allows
5043 wait_for_inferior() to expect/get timeouts will be
5045 wait_forever_enabled_p
= 0;
5048 /* First delete any symbols previously loaded from shared libraries. */
5049 no_shared_libraries (NULL
, 0);
5052 init_thread_list ();
5054 /* Start the remote connection. If error() or QUIT, discard this
5055 target (we'd otherwise be in an inconsistent state) and then
5056 propogate the error on up the exception chain. This ensures that
5057 the caller doesn't stumble along blindly assuming that the
5058 function succeeded. The CLI doesn't have this problem but other
5059 UI's, such as MI do.
5061 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5062 this function should return an error indication letting the
5063 caller restore the previous state. Unfortunately the command
5064 ``target remote'' is directly wired to this function making that
5065 impossible. On a positive note, the CLI side of this problem has
5066 been fixed - the function set_cmd_context() makes it possible for
5067 all the ``target ....'' commands to share a common callback
5068 function. See cli-dump.c. */
5073 remote_start_remote (from_tty
, target
, extended_p
);
5075 CATCH (ex
, RETURN_MASK_ALL
)
5077 /* Pop the partially set up target - unless something else did
5078 already before throwing the exception. */
5079 if (rs
->remote_desc
!= NULL
)
5080 remote_unpush_target ();
5081 if (target_async_permitted
)
5082 wait_forever_enabled_p
= 1;
5083 throw_exception (ex
);
5088 remote_btrace_reset ();
5090 if (target_async_permitted
)
5091 wait_forever_enabled_p
= 1;
5094 /* Detach the specified process. */
5097 remote_detach_pid (int pid
)
5099 struct remote_state
*rs
= get_remote_state ();
5101 if (remote_multi_process_p (rs
))
5102 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5104 strcpy (rs
->buf
, "D");
5107 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5109 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5111 else if (rs
->buf
[0] == '\0')
5112 error (_("Remote doesn't know how to detach"));
5114 error (_("Can't detach process."));
5117 /* This detaches a program to which we previously attached, using
5118 inferior_ptid to identify the process. After this is done, GDB
5119 can be used to debug some other program. We better not have left
5120 any breakpoints in the target program or it'll die when it hits
5124 remote_detach_1 (const char *args
, int from_tty
)
5126 int pid
= ptid_get_pid (inferior_ptid
);
5127 struct remote_state
*rs
= get_remote_state ();
5128 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5132 error (_("Argument given to \"detach\" when remotely debugging."));
5134 if (!target_has_execution
)
5135 error (_("No process to detach from."));
5137 target_announce_detach (from_tty
);
5139 /* Tell the remote target to detach. */
5140 remote_detach_pid (pid
);
5142 /* Exit only if this is the only active inferior. */
5143 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5144 puts_filtered (_("Ending remote debugging.\n"));
5146 /* Check to see if we are detaching a fork parent. Note that if we
5147 are detaching a fork child, tp == NULL. */
5148 is_fork_parent
= (tp
!= NULL
5149 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5151 /* If doing detach-on-fork, we don't mourn, because that will delete
5152 breakpoints that should be available for the followed inferior. */
5153 if (!is_fork_parent
)
5154 target_mourn_inferior (inferior_ptid
);
5157 inferior_ptid
= null_ptid
;
5158 detach_inferior (pid
);
5163 remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5165 remote_detach_1 (args
, from_tty
);
5169 extended_remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5171 remote_detach_1 (args
, from_tty
);
5174 /* Target follow-fork function for remote targets. On entry, and
5175 at return, the current inferior is the fork parent.
5177 Note that although this is currently only used for extended-remote,
5178 it is named remote_follow_fork in anticipation of using it for the
5179 remote target as well. */
5182 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5185 struct remote_state
*rs
= get_remote_state ();
5186 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5188 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5189 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5191 /* When following the parent and detaching the child, we detach
5192 the child here. For the case of following the child and
5193 detaching the parent, the detach is done in the target-
5194 independent follow fork code in infrun.c. We can't use
5195 target_detach when detaching an unfollowed child because
5196 the client side doesn't know anything about the child. */
5197 if (detach_fork
&& !follow_child
)
5199 /* Detach the fork child. */
5203 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5204 child_pid
= ptid_get_pid (child_ptid
);
5206 remote_detach_pid (child_pid
);
5207 detach_inferior (child_pid
);
5213 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5214 in the program space of the new inferior. On entry and at return the
5215 current inferior is the exec'ing inferior. INF is the new exec'd
5216 inferior, which may be the same as the exec'ing inferior unless
5217 follow-exec-mode is "new". */
5220 remote_follow_exec (struct target_ops
*ops
,
5221 struct inferior
*inf
, char *execd_pathname
)
5223 /* We know that this is a target file name, so if it has the "target:"
5224 prefix we strip it off before saving it in the program space. */
5225 if (is_target_filename (execd_pathname
))
5226 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5228 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5231 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5234 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5237 error (_("Argument given to \"disconnect\" when remotely debugging."));
5239 /* Make sure we unpush even the extended remote targets. Calling
5240 target_mourn_inferior won't unpush, and remote_mourn won't
5241 unpush if there is more than one inferior left. */
5242 unpush_target (target
);
5243 generic_mourn_inferior ();
5246 puts_filtered ("Ending remote debugging.\n");
5249 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5250 be chatty about it. */
5253 extended_remote_attach (struct target_ops
*target
, const char *args
,
5256 struct remote_state
*rs
= get_remote_state ();
5258 char *wait_status
= NULL
;
5260 pid
= parse_pid_to_attach (args
);
5262 /* Remote PID can be freely equal to getpid, do not check it here the same
5263 way as in other targets. */
5265 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5266 error (_("This target does not support attaching to a process"));
5270 char *exec_file
= get_exec_file (0);
5273 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5274 target_pid_to_str (pid_to_ptid (pid
)));
5276 printf_unfiltered (_("Attaching to %s\n"),
5277 target_pid_to_str (pid_to_ptid (pid
)));
5279 gdb_flush (gdb_stdout
);
5282 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5284 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5286 switch (packet_ok (rs
->buf
,
5287 &remote_protocol_packets
[PACKET_vAttach
]))
5290 if (!target_is_non_stop_p ())
5292 /* Save the reply for later. */
5293 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5294 strcpy (wait_status
, rs
->buf
);
5296 else if (strcmp (rs
->buf
, "OK") != 0)
5297 error (_("Attaching to %s failed with: %s"),
5298 target_pid_to_str (pid_to_ptid (pid
)),
5301 case PACKET_UNKNOWN
:
5302 error (_("This target does not support attaching to a process"));
5304 error (_("Attaching to %s failed"),
5305 target_pid_to_str (pid_to_ptid (pid
)));
5308 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5310 inferior_ptid
= pid_to_ptid (pid
);
5312 if (target_is_non_stop_p ())
5314 struct thread_info
*thread
;
5316 /* Get list of threads. */
5317 remote_update_thread_list (target
);
5319 thread
= first_thread_of_process (pid
);
5321 inferior_ptid
= thread
->ptid
;
5323 inferior_ptid
= pid_to_ptid (pid
);
5325 /* Invalidate our notion of the remote current thread. */
5326 record_currthread (rs
, minus_one_ptid
);
5330 /* Now, if we have thread information, update inferior_ptid. */
5331 inferior_ptid
= remote_current_thread (inferior_ptid
);
5333 /* Add the main thread to the thread list. */
5334 add_thread_silent (inferior_ptid
);
5337 /* Next, if the target can specify a description, read it. We do
5338 this before anything involving memory or registers. */
5339 target_find_description ();
5341 if (!target_is_non_stop_p ())
5343 /* Use the previously fetched status. */
5344 gdb_assert (wait_status
!= NULL
);
5346 if (target_can_async_p ())
5348 struct notif_event
*reply
5349 = remote_notif_parse (¬if_client_stop
, wait_status
);
5351 push_stop_reply ((struct stop_reply
*) reply
);
5357 gdb_assert (wait_status
!= NULL
);
5358 strcpy (rs
->buf
, wait_status
);
5359 rs
->cached_wait_status
= 1;
5363 gdb_assert (wait_status
== NULL
);
5366 /* Implementation of the to_post_attach method. */
5369 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5371 /* Get text, data & bss offsets. */
5374 /* In certain cases GDB might not have had the chance to start
5375 symbol lookup up until now. This could happen if the debugged
5376 binary is not using shared libraries, the vsyscall page is not
5377 present (on Linux) and the binary itself hadn't changed since the
5378 debugging process was started. */
5379 if (symfile_objfile
!= NULL
)
5380 remote_check_symbols();
5384 /* Check for the availability of vCont. This function should also check
5388 remote_vcont_probe (struct remote_state
*rs
)
5392 strcpy (rs
->buf
, "vCont?");
5394 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5397 /* Make sure that the features we assume are supported. */
5398 if (startswith (buf
, "vCont"))
5401 int support_c
, support_C
;
5403 rs
->supports_vCont
.s
= 0;
5404 rs
->supports_vCont
.S
= 0;
5407 rs
->supports_vCont
.t
= 0;
5408 rs
->supports_vCont
.r
= 0;
5409 while (p
&& *p
== ';')
5412 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5413 rs
->supports_vCont
.s
= 1;
5414 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5415 rs
->supports_vCont
.S
= 1;
5416 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5418 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5420 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5421 rs
->supports_vCont
.t
= 1;
5422 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5423 rs
->supports_vCont
.r
= 1;
5425 p
= strchr (p
, ';');
5428 /* If c, and C are not all supported, we can't use vCont. Clearing
5429 BUF will make packet_ok disable the packet. */
5430 if (!support_c
|| !support_C
)
5434 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5437 /* Helper function for building "vCont" resumptions. Write a
5438 resumption to P. ENDP points to one-passed-the-end of the buffer
5439 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5440 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5441 resumed thread should be single-stepped and/or signalled. If PTID
5442 equals minus_one_ptid, then all threads are resumed; if PTID
5443 represents a process, then all threads of the process are resumed;
5444 the thread to be stepped and/or signalled is given in the global
5448 append_resumption (char *p
, char *endp
,
5449 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5451 struct remote_state
*rs
= get_remote_state ();
5453 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5454 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5456 /* GDB is willing to range step. */
5457 && use_range_stepping
5458 /* Target supports range stepping. */
5459 && rs
->supports_vCont
.r
5460 /* We don't currently support range stepping multiple
5461 threads with a wildcard (though the protocol allows it,
5462 so stubs shouldn't make an active effort to forbid
5464 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5466 struct thread_info
*tp
;
5468 if (ptid_equal (ptid
, minus_one_ptid
))
5470 /* If we don't know about the target thread's tid, then
5471 we're resuming magic_null_ptid (see caller). */
5472 tp
= find_thread_ptid (magic_null_ptid
);
5475 tp
= find_thread_ptid (ptid
);
5476 gdb_assert (tp
!= NULL
);
5478 if (tp
->control
.may_range_step
)
5480 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5482 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5483 phex_nz (tp
->control
.step_range_start
,
5485 phex_nz (tp
->control
.step_range_end
,
5489 p
+= xsnprintf (p
, endp
- p
, ";s");
5492 p
+= xsnprintf (p
, endp
- p
, ";s");
5493 else if (siggnal
!= GDB_SIGNAL_0
)
5494 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5496 p
+= xsnprintf (p
, endp
- p
, ";c");
5498 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5502 /* All (-1) threads of process. */
5503 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5505 p
+= xsnprintf (p
, endp
- p
, ":");
5506 p
= write_ptid (p
, endp
, nptid
);
5508 else if (!ptid_equal (ptid
, minus_one_ptid
))
5510 p
+= xsnprintf (p
, endp
- p
, ":");
5511 p
= write_ptid (p
, endp
, ptid
);
5517 /* Clear the thread's private info on resume. */
5520 resume_clear_thread_private_info (struct thread_info
*thread
)
5522 if (thread
->priv
!= NULL
)
5524 remote_thread_info
*priv
= get_remote_thread_info (thread
);
5526 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5527 priv
->watch_data_address
= 0;
5531 /* Append a vCont continue-with-signal action for threads that have a
5532 non-zero stop signal. */
5535 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5537 struct thread_info
*thread
;
5539 ALL_NON_EXITED_THREADS (thread
)
5540 if (ptid_match (thread
->ptid
, ptid
)
5541 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5542 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5544 p
= append_resumption (p
, endp
, thread
->ptid
,
5545 0, thread
->suspend
.stop_signal
);
5546 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5547 resume_clear_thread_private_info (thread
);
5553 /* Set the target running, using the packets that use Hc
5557 remote_resume_with_hc (struct target_ops
*ops
,
5558 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5560 struct remote_state
*rs
= get_remote_state ();
5561 struct thread_info
*thread
;
5564 rs
->last_sent_signal
= siggnal
;
5565 rs
->last_sent_step
= step
;
5567 /* The c/s/C/S resume packets use Hc, so set the continue
5569 if (ptid_equal (ptid
, minus_one_ptid
))
5570 set_continue_thread (any_thread_ptid
);
5572 set_continue_thread (ptid
);
5574 ALL_NON_EXITED_THREADS (thread
)
5575 resume_clear_thread_private_info (thread
);
5578 if (execution_direction
== EXEC_REVERSE
)
5580 /* We don't pass signals to the target in reverse exec mode. */
5581 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5582 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5585 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5586 error (_("Remote reverse-step not supported."));
5587 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5588 error (_("Remote reverse-continue not supported."));
5590 strcpy (buf
, step
? "bs" : "bc");
5592 else if (siggnal
!= GDB_SIGNAL_0
)
5594 buf
[0] = step
? 'S' : 'C';
5595 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5596 buf
[2] = tohex (((int) siggnal
) & 0xf);
5600 strcpy (buf
, step
? "s" : "c");
5605 /* Resume the remote inferior by using a "vCont" packet. The thread
5606 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5607 resumed thread should be single-stepped and/or signalled. If PTID
5608 equals minus_one_ptid, then all threads are resumed; the thread to
5609 be stepped and/or signalled is given in the global INFERIOR_PTID.
5610 This function returns non-zero iff it resumes the inferior.
5612 This function issues a strict subset of all possible vCont commands
5616 remote_resume_with_vcont (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5618 struct remote_state
*rs
= get_remote_state ();
5622 /* No reverse execution actions defined for vCont. */
5623 if (execution_direction
== EXEC_REVERSE
)
5626 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5627 remote_vcont_probe (rs
);
5629 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5633 endp
= rs
->buf
+ get_remote_packet_size ();
5635 /* If we could generate a wider range of packets, we'd have to worry
5636 about overflowing BUF. Should there be a generic
5637 "multi-part-packet" packet? */
5639 p
+= xsnprintf (p
, endp
- p
, "vCont");
5641 if (ptid_equal (ptid
, magic_null_ptid
))
5643 /* MAGIC_NULL_PTID means that we don't have any active threads,
5644 so we don't have any TID numbers the inferior will
5645 understand. Make sure to only send forms that do not specify
5647 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5649 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5651 /* Resume all threads (of all processes, or of a single
5652 process), with preference for INFERIOR_PTID. This assumes
5653 inferior_ptid belongs to the set of all threads we are about
5655 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5657 /* Step inferior_ptid, with or without signal. */
5658 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5661 /* Also pass down any pending signaled resumption for other
5662 threads not the current. */
5663 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5665 /* And continue others without a signal. */
5666 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5670 /* Scheduler locking; resume only PTID. */
5671 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5674 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5677 if (target_is_non_stop_p ())
5679 /* In non-stop, the stub replies to vCont with "OK". The stop
5680 reply will be reported asynchronously by means of a `%Stop'
5682 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5683 if (strcmp (rs
->buf
, "OK") != 0)
5684 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5690 /* Tell the remote machine to resume. */
5693 remote_resume (struct target_ops
*ops
,
5694 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5696 struct remote_state
*rs
= get_remote_state ();
5698 /* When connected in non-stop mode, the core resumes threads
5699 individually. Resuming remote threads directly in target_resume
5700 would thus result in sending one packet per thread. Instead, to
5701 minimize roundtrip latency, here we just store the resume
5702 request; the actual remote resumption will be done in
5703 target_commit_resume / remote_commit_resume, where we'll be able
5704 to do vCont action coalescing. */
5705 if (target_is_non_stop_p () && execution_direction
!= EXEC_REVERSE
)
5707 remote_thread_info
*remote_thr
;
5709 if (ptid_equal (minus_one_ptid
, ptid
) || ptid_is_pid (ptid
))
5710 remote_thr
= get_remote_thread_info (inferior_ptid
);
5712 remote_thr
= get_remote_thread_info (ptid
);
5714 remote_thr
->last_resume_step
= step
;
5715 remote_thr
->last_resume_sig
= siggnal
;
5719 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5720 (explained in remote-notif.c:handle_notification) so
5721 remote_notif_process is not called. We need find a place where
5722 it is safe to start a 'vNotif' sequence. It is good to do it
5723 before resuming inferior, because inferior was stopped and no RSP
5724 traffic at that moment. */
5725 if (!target_is_non_stop_p ())
5726 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5728 rs
->last_resume_exec_dir
= execution_direction
;
5730 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5731 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
5732 remote_resume_with_hc (ops
, ptid
, step
, siggnal
);
5734 /* We are about to start executing the inferior, let's register it
5735 with the event loop. NOTE: this is the one place where all the
5736 execution commands end up. We could alternatively do this in each
5737 of the execution commands in infcmd.c. */
5738 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5739 into infcmd.c in order to allow inferior function calls to work
5740 NOT asynchronously. */
5741 if (target_can_async_p ())
5744 /* We've just told the target to resume. The remote server will
5745 wait for the inferior to stop, and then send a stop reply. In
5746 the mean time, we can't start another command/query ourselves
5747 because the stub wouldn't be ready to process it. This applies
5748 only to the base all-stop protocol, however. In non-stop (which
5749 only supports vCont), the stub replies with an "OK", and is
5750 immediate able to process further serial input. */
5751 if (!target_is_non_stop_p ())
5752 rs
->waiting_for_stop_reply
= 1;
5755 static void check_pending_events_prevent_wildcard_vcont
5756 (int *may_global_wildcard_vcont
);
5757 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
5759 /* Private per-inferior info for target remote processes. */
5761 struct remote_inferior
: public private_inferior
5763 /* Whether we can send a wildcard vCont for this process. */
5764 bool may_wildcard_vcont
= true;
5767 /* Get the remote private inferior data associated to INF. */
5769 static remote_inferior
*
5770 get_remote_inferior (inferior
*inf
)
5772 if (inf
->priv
== NULL
)
5773 inf
->priv
.reset (new remote_inferior
);
5775 return static_cast<remote_inferior
*> (inf
->priv
.get ());
5778 /* Structure used to track the construction of a vCont packet in the
5779 outgoing packet buffer. This is used to send multiple vCont
5780 packets if we have more actions than would fit a single packet. */
5782 struct vcont_builder
5784 /* Pointer to the first action. P points here if no action has been
5788 /* Where the next action will be appended. */
5791 /* The end of the buffer. Must never write past this. */
5795 /* Prepare the outgoing buffer for a new vCont packet. */
5798 vcont_builder_restart (struct vcont_builder
*builder
)
5800 struct remote_state
*rs
= get_remote_state ();
5802 builder
->p
= rs
->buf
;
5803 builder
->endp
= rs
->buf
+ get_remote_packet_size ();
5804 builder
->p
+= xsnprintf (builder
->p
, builder
->endp
- builder
->p
, "vCont");
5805 builder
->first_action
= builder
->p
;
5808 /* If the vCont packet being built has any action, send it to the
5812 vcont_builder_flush (struct vcont_builder
*builder
)
5814 struct remote_state
*rs
;
5816 if (builder
->p
== builder
->first_action
)
5819 rs
= get_remote_state ();
5821 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5822 if (strcmp (rs
->buf
, "OK") != 0)
5823 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5826 /* The largest action is range-stepping, with its two addresses. This
5827 is more than sufficient. If a new, bigger action is created, it'll
5828 quickly trigger a failed assertion in append_resumption (and we'll
5830 #define MAX_ACTION_SIZE 200
5832 /* Append a new vCont action in the outgoing packet being built. If
5833 the action doesn't fit the packet along with previous actions, push
5834 what we've got so far to the remote end and start over a new vCont
5835 packet (with the new action). */
5838 vcont_builder_push_action (struct vcont_builder
*builder
,
5839 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5841 char buf
[MAX_ACTION_SIZE
+ 1];
5845 endp
= append_resumption (buf
, buf
+ sizeof (buf
),
5846 ptid
, step
, siggnal
);
5848 /* Check whether this new action would fit in the vCont packet along
5849 with previous actions. If not, send what we've got so far and
5850 start a new vCont packet. */
5852 if (rsize
> builder
->endp
- builder
->p
)
5854 vcont_builder_flush (builder
);
5855 vcont_builder_restart (builder
);
5857 /* Should now fit. */
5858 gdb_assert (rsize
<= builder
->endp
- builder
->p
);
5861 memcpy (builder
->p
, buf
, rsize
);
5862 builder
->p
+= rsize
;
5866 /* to_commit_resume implementation. */
5869 remote_commit_resume (struct target_ops
*ops
)
5871 struct inferior
*inf
;
5872 struct thread_info
*tp
;
5873 int any_process_wildcard
;
5874 int may_global_wildcard_vcont
;
5875 struct vcont_builder vcont_builder
;
5877 /* If connected in all-stop mode, we'd send the remote resume
5878 request directly from remote_resume. Likewise if
5879 reverse-debugging, as there are no defined vCont actions for
5880 reverse execution. */
5881 if (!target_is_non_stop_p () || execution_direction
== EXEC_REVERSE
)
5884 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5885 instead of resuming all threads of each process individually.
5886 However, if any thread of a process must remain halted, we can't
5887 send wildcard resumes and must send one action per thread.
5889 Care must be taken to not resume threads/processes the server
5890 side already told us are stopped, but the core doesn't know about
5891 yet, because the events are still in the vStopped notification
5894 #1 => vCont s:p1.1;c
5896 #3 <= %Stopped T05 p1.1
5901 #8 (infrun handles the stop for p1.1 and continues stepping)
5902 #9 => vCont s:p1.1;c
5904 The last vCont above would resume thread p1.2 by mistake, because
5905 the server has no idea that the event for p1.2 had not been
5908 The server side must similarly ignore resume actions for the
5909 thread that has a pending %Stopped notification (and any other
5910 threads with events pending), until GDB acks the notification
5911 with vStopped. Otherwise, e.g., the following case is
5914 #1 => g (or any other packet)
5916 #3 <= %Stopped T05 p1.2
5917 #4 => vCont s:p1.1;c
5920 Above, the server must not resume thread p1.2. GDB can't know
5921 that p1.2 stopped until it acks the %Stopped notification, and
5922 since from GDB's perspective all threads should be running, it
5925 Finally, special care must also be given to handling fork/vfork
5926 events. A (v)fork event actually tells us that two processes
5927 stopped -- the parent and the child. Until we follow the fork,
5928 we must not resume the child. Therefore, if we have a pending
5929 fork follow, we must not send a global wildcard resume action
5930 (vCont;c). We can still send process-wide wildcards though. */
5932 /* Start by assuming a global wildcard (vCont;c) is possible. */
5933 may_global_wildcard_vcont
= 1;
5935 /* And assume every process is individually wildcard-able too. */
5936 ALL_NON_EXITED_INFERIORS (inf
)
5938 remote_inferior
*priv
= get_remote_inferior (inf
);
5940 priv
->may_wildcard_vcont
= true;
5943 /* Check for any pending events (not reported or processed yet) and
5944 disable process and global wildcard resumes appropriately. */
5945 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
5947 ALL_NON_EXITED_THREADS (tp
)
5949 /* If a thread of a process is not meant to be resumed, then we
5950 can't wildcard that process. */
5953 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
5955 /* And if we can't wildcard a process, we can't wildcard
5956 everything either. */
5957 may_global_wildcard_vcont
= 0;
5961 /* If a thread is the parent of an unfollowed fork, then we
5962 can't do a global wildcard, as that would resume the fork
5964 if (is_pending_fork_parent_thread (tp
))
5965 may_global_wildcard_vcont
= 0;
5968 /* Now let's build the vCont packet(s). Actions must be appended
5969 from narrower to wider scopes (thread -> process -> global). If
5970 we end up with too many actions for a single packet vcont_builder
5971 flushes the current vCont packet to the remote side and starts a
5973 vcont_builder_restart (&vcont_builder
);
5975 /* Threads first. */
5976 ALL_NON_EXITED_THREADS (tp
)
5978 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
5980 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
5983 gdb_assert (!thread_is_in_step_over_chain (tp
));
5985 if (!remote_thr
->last_resume_step
5986 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
5987 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
5989 /* We'll send a wildcard resume instead. */
5990 remote_thr
->vcont_resumed
= 1;
5994 vcont_builder_push_action (&vcont_builder
, tp
->ptid
,
5995 remote_thr
->last_resume_step
,
5996 remote_thr
->last_resume_sig
);
5997 remote_thr
->vcont_resumed
= 1;
6000 /* Now check whether we can send any process-wide wildcard. This is
6001 to avoid sending a global wildcard in the case nothing is
6002 supposed to be resumed. */
6003 any_process_wildcard
= 0;
6005 ALL_NON_EXITED_INFERIORS (inf
)
6007 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6009 any_process_wildcard
= 1;
6014 if (any_process_wildcard
)
6016 /* If all processes are wildcard-able, then send a single "c"
6017 action, otherwise, send an "all (-1) threads of process"
6018 continue action for each running process, if any. */
6019 if (may_global_wildcard_vcont
)
6021 vcont_builder_push_action (&vcont_builder
, minus_one_ptid
,
6026 ALL_NON_EXITED_INFERIORS (inf
)
6028 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6030 vcont_builder_push_action (&vcont_builder
,
6031 pid_to_ptid (inf
->pid
),
6038 vcont_builder_flush (&vcont_builder
);
6043 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6044 thread, all threads of a remote process, or all threads of all
6048 remote_stop_ns (ptid_t ptid
)
6050 struct remote_state
*rs
= get_remote_state ();
6052 char *endp
= rs
->buf
+ get_remote_packet_size ();
6054 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6055 remote_vcont_probe (rs
);
6057 if (!rs
->supports_vCont
.t
)
6058 error (_("Remote server does not support stopping threads"));
6060 if (ptid_equal (ptid
, minus_one_ptid
)
6061 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
6062 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6067 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6069 if (ptid_is_pid (ptid
))
6070 /* All (-1) threads of process. */
6071 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
6074 /* Small optimization: if we already have a stop reply for
6075 this thread, no use in telling the stub we want this
6077 if (peek_stop_reply (ptid
))
6083 write_ptid (p
, endp
, nptid
);
6086 /* In non-stop, we get an immediate OK reply. The stop reply will
6087 come in asynchronously by notification. */
6089 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6090 if (strcmp (rs
->buf
, "OK") != 0)
6091 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6094 /* All-stop version of target_interrupt. Sends a break or a ^C to
6095 interrupt the remote target. It is undefined which thread of which
6096 process reports the interrupt. */
6099 remote_interrupt_as (void)
6101 struct remote_state
*rs
= get_remote_state ();
6103 rs
->ctrlc_pending_p
= 1;
6105 /* If the inferior is stopped already, but the core didn't know
6106 about it yet, just ignore the request. The cached wait status
6107 will be collected in remote_wait. */
6108 if (rs
->cached_wait_status
)
6111 /* Send interrupt_sequence to remote target. */
6112 send_interrupt_sequence ();
6115 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6116 the remote target. It is undefined which thread of which process
6117 reports the interrupt. Throws an error if the packet is not
6118 supported by the server. */
6121 remote_interrupt_ns (void)
6123 struct remote_state
*rs
= get_remote_state ();
6125 char *endp
= rs
->buf
+ get_remote_packet_size ();
6127 xsnprintf (p
, endp
- p
, "vCtrlC");
6129 /* In non-stop, we get an immediate OK reply. The stop reply will
6130 come in asynchronously by notification. */
6132 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6134 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6138 case PACKET_UNKNOWN
:
6139 error (_("No support for interrupting the remote target."));
6141 error (_("Interrupting target failed: %s"), rs
->buf
);
6145 /* Implement the to_stop function for the remote targets. */
6148 remote_stop (struct target_ops
*self
, ptid_t ptid
)
6151 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6153 if (target_is_non_stop_p ())
6154 remote_stop_ns (ptid
);
6157 /* We don't currently have a way to transparently pause the
6158 remote target in all-stop mode. Interrupt it instead. */
6159 remote_interrupt_as ();
6163 /* Implement the to_interrupt function for the remote targets. */
6166 remote_interrupt (struct target_ops
*self
, ptid_t ptid
)
6169 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6171 if (target_is_non_stop_p ())
6172 remote_interrupt_ns ();
6174 remote_interrupt_as ();
6177 /* Implement the to_pass_ctrlc function for the remote targets. */
6180 remote_pass_ctrlc (struct target_ops
*self
)
6182 struct remote_state
*rs
= get_remote_state ();
6185 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6187 /* If we're starting up, we're not fully synced yet. Quit
6189 if (rs
->starting_up
)
6191 /* If ^C has already been sent once, offer to disconnect. */
6192 else if (rs
->ctrlc_pending_p
)
6195 target_interrupt (inferior_ptid
);
6198 /* Ask the user what to do when an interrupt is received. */
6201 interrupt_query (void)
6203 struct remote_state
*rs
= get_remote_state ();
6205 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6207 if (query (_("The target is not responding to interrupt requests.\n"
6208 "Stop debugging it? ")))
6210 remote_unpush_target ();
6211 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6216 if (query (_("Interrupted while waiting for the program.\n"
6217 "Give up waiting? ")))
6222 /* Enable/disable target terminal ownership. Most targets can use
6223 terminal groups to control terminal ownership. Remote targets are
6224 different in that explicit transfer of ownership to/from GDB/target
6228 remote_terminal_inferior (struct target_ops
*self
)
6230 /* NOTE: At this point we could also register our selves as the
6231 recipient of all input. Any characters typed could then be
6232 passed on down to the target. */
6236 remote_terminal_ours (struct target_ops
*self
)
6241 remote_console_output (char *msg
)
6245 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6248 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6252 fputs_unfiltered (tb
, gdb_stdtarg
);
6254 gdb_flush (gdb_stdtarg
);
6257 DEF_VEC_O(cached_reg_t
);
6259 typedef struct stop_reply
6261 struct notif_event base
;
6263 /* The identifier of the thread about this event */
6266 /* The remote state this event is associated with. When the remote
6267 connection, represented by a remote_state object, is closed,
6268 all the associated stop_reply events should be released. */
6269 struct remote_state
*rs
;
6271 struct target_waitstatus ws
;
6273 /* The architecture associated with the expedited registers. */
6276 /* Expedited registers. This makes remote debugging a bit more
6277 efficient for those targets that provide critical registers as
6278 part of their normal status mechanism (as another roundtrip to
6279 fetch them is avoided). */
6280 VEC(cached_reg_t
) *regcache
;
6282 enum target_stop_reason stop_reason
;
6284 CORE_ADDR watch_data_address
;
6289 DECLARE_QUEUE_P (stop_reply_p
);
6290 DEFINE_QUEUE_P (stop_reply_p
);
6291 /* The list of already fetched and acknowledged stop events. This
6292 queue is used for notification Stop, and other notifications
6293 don't need queue for their events, because the notification events
6294 of Stop can't be consumed immediately, so that events should be
6295 queued first, and be consumed by remote_wait_{ns,as} one per
6296 time. Other notifications can consume their events immediately,
6297 so queue is not needed for them. */
6298 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6301 stop_reply_xfree (struct stop_reply
*r
)
6303 notif_event_xfree ((struct notif_event
*) r
);
6306 /* Return the length of the stop reply queue. */
6309 stop_reply_queue_length (void)
6311 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6315 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6316 struct notif_event
*event
)
6318 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6322 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6323 struct notif_event
*event
)
6325 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6328 putpkt (self
->ack_command
);
6330 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6331 /* We got an unknown stop reply. */
6332 error (_("Unknown stop reply"));
6334 push_stop_reply (stop_reply
);
6338 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6340 /* We can't get pending events in remote_notif_process for
6341 notification stop, and we have to do this in remote_wait_ns
6342 instead. If we fetch all queued events from stub, remote stub
6343 may exit and we have no chance to process them back in
6345 mark_async_event_handler (remote_async_inferior_event_token
);
6350 stop_reply_dtr (struct notif_event
*event
)
6352 struct stop_reply
*r
= (struct stop_reply
*) event
;
6357 VEC_iterate (cached_reg_t
, r
->regcache
, ix
, reg
);
6361 VEC_free (cached_reg_t
, r
->regcache
);
6364 static struct notif_event
*
6365 remote_notif_stop_alloc_reply (void)
6367 /* We cast to a pointer to the "base class". */
6368 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6370 r
->dtr
= stop_reply_dtr
;
6375 /* A client of notification Stop. */
6377 struct notif_client notif_client_stop
=
6381 remote_notif_stop_parse
,
6382 remote_notif_stop_ack
,
6383 remote_notif_stop_can_get_pending_events
,
6384 remote_notif_stop_alloc_reply
,
6388 /* A parameter to pass data in and out. */
6390 struct queue_iter_param
6393 struct stop_reply
*output
;
6396 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6397 the pid of the process that owns the threads we want to check, or
6398 -1 if we want to check all threads. */
6401 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6404 if (ws
->kind
== TARGET_WAITKIND_FORKED
6405 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6407 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6414 /* Return the thread's pending status used to determine whether the
6415 thread is a fork parent stopped at a fork event. */
6417 static struct target_waitstatus
*
6418 thread_pending_fork_status (struct thread_info
*thread
)
6420 if (thread
->suspend
.waitstatus_pending_p
)
6421 return &thread
->suspend
.waitstatus
;
6423 return &thread
->pending_follow
;
6426 /* Determine if THREAD is a pending fork parent thread. */
6429 is_pending_fork_parent_thread (struct thread_info
*thread
)
6431 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6434 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6437 /* Check whether EVENT is a fork event, and if it is, remove the
6438 fork child from the context list passed in DATA. */
6441 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6442 QUEUE_ITER (stop_reply_p
) *iter
,
6446 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6447 struct threads_listing_context
*context
6448 = (struct threads_listing_context
*) param
->input
;
6450 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6451 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6452 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6453 context
->remove_thread (event
->ws
.value
.related_pid
);
6458 /* If CONTEXT contains any fork child threads that have not been
6459 reported yet, remove them from the CONTEXT list. If such a
6460 thread exists it is because we are stopped at a fork catchpoint
6461 and have not yet called follow_fork, which will set up the
6462 host-side data structures for the new process. */
6465 remove_new_fork_children (struct threads_listing_context
*context
)
6467 struct thread_info
* thread
;
6469 struct notif_client
*notif
= ¬if_client_stop
;
6470 struct queue_iter_param param
;
6472 /* For any threads stopped at a fork event, remove the corresponding
6473 fork child threads from the CONTEXT list. */
6474 ALL_NON_EXITED_THREADS (thread
)
6476 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6478 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6479 context
->remove_thread (ws
->value
.related_pid
);
6482 /* Check for any pending fork events (not reported or processed yet)
6483 in process PID and remove those fork child threads from the
6484 CONTEXT list as well. */
6485 remote_notif_get_pending_events (notif
);
6486 param
.input
= context
;
6487 param
.output
= NULL
;
6488 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6489 remove_child_of_pending_fork
, ¶m
);
6492 /* Check whether EVENT would prevent a global or process wildcard
6496 check_pending_event_prevents_wildcard_vcont_callback
6497 (QUEUE (stop_reply_p
) *q
,
6498 QUEUE_ITER (stop_reply_p
) *iter
,
6502 struct inferior
*inf
;
6503 int *may_global_wildcard_vcont
= (int *) data
;
6505 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6506 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6509 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6510 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6511 *may_global_wildcard_vcont
= 0;
6513 inf
= find_inferior_ptid (event
->ptid
);
6515 /* This may be the first time we heard about this process.
6516 Regardless, we must not do a global wildcard resume, otherwise
6517 we'd resume this process too. */
6518 *may_global_wildcard_vcont
= 0;
6520 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
6525 /* Check whether any event pending in the vStopped queue would prevent
6526 a global or process wildcard vCont action. Clear
6527 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6528 and clear the event inferior's may_wildcard_vcont flag if we can't
6529 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6532 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard
)
6534 struct notif_client
*notif
= ¬if_client_stop
;
6536 remote_notif_get_pending_events (notif
);
6537 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6538 check_pending_event_prevents_wildcard_vcont_callback
,
6539 may_global_wildcard
);
6542 /* Remove stop replies in the queue if its pid is equal to the given
6546 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6547 QUEUE_ITER (stop_reply_p
) *iter
,
6551 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6552 struct inferior
*inf
= (struct inferior
*) param
->input
;
6554 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6556 stop_reply_xfree (event
);
6557 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6563 /* Discard all pending stop replies of inferior INF. */
6566 discard_pending_stop_replies (struct inferior
*inf
)
6568 struct queue_iter_param param
;
6569 struct stop_reply
*reply
;
6570 struct remote_state
*rs
= get_remote_state ();
6571 struct remote_notif_state
*rns
= rs
->notif_state
;
6573 /* This function can be notified when an inferior exists. When the
6574 target is not remote, the notification state is NULL. */
6575 if (rs
->remote_desc
== NULL
)
6578 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6580 /* Discard the in-flight notification. */
6581 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6583 stop_reply_xfree (reply
);
6584 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6588 param
.output
= NULL
;
6589 /* Discard the stop replies we have already pulled with
6591 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6592 remove_stop_reply_for_inferior
, ¶m
);
6595 /* If its remote state is equal to the given remote state,
6596 remove EVENT from the stop reply queue. */
6599 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6600 QUEUE_ITER (stop_reply_p
) *iter
,
6604 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6605 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6607 if (event
->rs
== rs
)
6609 stop_reply_xfree (event
);
6610 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6616 /* Discard the stop replies for RS in stop_reply_queue. */
6619 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6621 struct queue_iter_param param
;
6624 param
.output
= NULL
;
6625 /* Discard the stop replies we have already pulled with
6627 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6628 remove_stop_reply_of_remote_state
, ¶m
);
6631 /* A parameter to pass data in and out. */
6634 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6635 QUEUE_ITER (stop_reply_p
) *iter
,
6639 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6640 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6642 if (ptid_match (event
->ptid
, *ptid
))
6644 param
->output
= event
;
6645 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6652 /* Remove the first reply in 'stop_reply_queue' which matches
6655 static struct stop_reply
*
6656 remote_notif_remove_queued_reply (ptid_t ptid
)
6658 struct queue_iter_param param
;
6660 param
.input
= &ptid
;
6661 param
.output
= NULL
;
6663 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6664 remote_notif_remove_once_on_match
, ¶m
);
6666 fprintf_unfiltered (gdb_stdlog
,
6667 "notif: discard queued event: 'Stop' in %s\n",
6668 target_pid_to_str (ptid
));
6670 return param
.output
;
6673 /* Look for a queued stop reply belonging to PTID. If one is found,
6674 remove it from the queue, and return it. Returns NULL if none is
6675 found. If there are still queued events left to process, tell the
6676 event loop to get back to target_wait soon. */
6678 static struct stop_reply
*
6679 queued_stop_reply (ptid_t ptid
)
6681 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6683 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6684 /* There's still at least an event left. */
6685 mark_async_event_handler (remote_async_inferior_event_token
);
6690 /* Push a fully parsed stop reply in the stop reply queue. Since we
6691 know that we now have at least one queued event left to pass to the
6692 core side, tell the event loop to get back to target_wait soon. */
6695 push_stop_reply (struct stop_reply
*new_event
)
6697 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6700 fprintf_unfiltered (gdb_stdlog
,
6701 "notif: push 'Stop' %s to queue %d\n",
6702 target_pid_to_str (new_event
->ptid
),
6703 QUEUE_length (stop_reply_p
,
6706 mark_async_event_handler (remote_async_inferior_event_token
);
6710 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6711 QUEUE_ITER (stop_reply_p
) *iter
,
6712 struct stop_reply
*event
,
6715 ptid_t
*ptid
= (ptid_t
*) data
;
6717 return !(ptid_equal (*ptid
, event
->ptid
)
6718 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6721 /* Returns true if we have a stop reply for PTID. */
6724 peek_stop_reply (ptid_t ptid
)
6726 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6727 stop_reply_match_ptid_and_ws
, &ptid
);
6730 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6731 starting with P and ending with PEND matches PREFIX. */
6734 strprefix (const char *p
, const char *pend
, const char *prefix
)
6736 for ( ; p
< pend
; p
++, prefix
++)
6739 return *prefix
== '\0';
6742 /* Parse the stop reply in BUF. Either the function succeeds, and the
6743 result is stored in EVENT, or throws an error. */
6746 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6748 remote_arch_state
*rsa
= NULL
;
6753 event
->ptid
= null_ptid
;
6754 event
->rs
= get_remote_state ();
6755 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6756 event
->ws
.value
.integer
= 0;
6757 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6758 event
->regcache
= NULL
;
6763 case 'T': /* Status with PC, SP, FP, ... */
6764 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6765 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6767 n... = register number
6768 r... = register contents
6771 p
= &buf
[3]; /* after Txx */
6777 p1
= strchr (p
, ':');
6779 error (_("Malformed packet(a) (missing colon): %s\n\
6783 error (_("Malformed packet(a) (missing register number): %s\n\
6787 /* Some "registers" are actually extended stop information.
6788 Note if you're adding a new entry here: GDB 7.9 and
6789 earlier assume that all register "numbers" that start
6790 with an hex digit are real register numbers. Make sure
6791 the server only sends such a packet if it knows the
6792 client understands it. */
6794 if (strprefix (p
, p1
, "thread"))
6795 event
->ptid
= read_ptid (++p1
, &p
);
6796 else if (strprefix (p
, p1
, "syscall_entry"))
6800 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6801 p
= unpack_varlen_hex (++p1
, &sysno
);
6802 event
->ws
.value
.syscall_number
= (int) sysno
;
6804 else if (strprefix (p
, p1
, "syscall_return"))
6808 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6809 p
= unpack_varlen_hex (++p1
, &sysno
);
6810 event
->ws
.value
.syscall_number
= (int) sysno
;
6812 else if (strprefix (p
, p1
, "watch")
6813 || strprefix (p
, p1
, "rwatch")
6814 || strprefix (p
, p1
, "awatch"))
6816 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6817 p
= unpack_varlen_hex (++p1
, &addr
);
6818 event
->watch_data_address
= (CORE_ADDR
) addr
;
6820 else if (strprefix (p
, p1
, "swbreak"))
6822 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6824 /* Make sure the stub doesn't forget to indicate support
6826 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6827 error (_("Unexpected swbreak stop reason"));
6829 /* The value part is documented as "must be empty",
6830 though we ignore it, in case we ever decide to make
6831 use of it in a backward compatible way. */
6832 p
= strchrnul (p1
+ 1, ';');
6834 else if (strprefix (p
, p1
, "hwbreak"))
6836 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6838 /* Make sure the stub doesn't forget to indicate support
6840 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6841 error (_("Unexpected hwbreak stop reason"));
6844 p
= strchrnul (p1
+ 1, ';');
6846 else if (strprefix (p
, p1
, "library"))
6848 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6849 p
= strchrnul (p1
+ 1, ';');
6851 else if (strprefix (p
, p1
, "replaylog"))
6853 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6854 /* p1 will indicate "begin" or "end", but it makes
6855 no difference for now, so ignore it. */
6856 p
= strchrnul (p1
+ 1, ';');
6858 else if (strprefix (p
, p1
, "core"))
6862 p
= unpack_varlen_hex (++p1
, &c
);
6865 else if (strprefix (p
, p1
, "fork"))
6867 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6868 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6870 else if (strprefix (p
, p1
, "vfork"))
6872 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6873 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6875 else if (strprefix (p
, p1
, "vforkdone"))
6877 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6878 p
= strchrnul (p1
+ 1, ';');
6880 else if (strprefix (p
, p1
, "exec"))
6883 char pathname
[PATH_MAX
];
6886 /* Determine the length of the execd pathname. */
6887 p
= unpack_varlen_hex (++p1
, &ignored
);
6888 pathlen
= (p
- p1
) / 2;
6890 /* Save the pathname for event reporting and for
6891 the next run command. */
6892 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6893 pathname
[pathlen
] = '\0';
6895 /* This is freed during event handling. */
6896 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6897 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6899 /* Skip the registers included in this packet, since
6900 they may be for an architecture different from the
6901 one used by the original program. */
6904 else if (strprefix (p
, p1
, "create"))
6906 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
6907 p
= strchrnul (p1
+ 1, ';');
6916 p
= strchrnul (p1
+ 1, ';');
6921 /* Maybe a real ``P'' register number. */
6922 p_temp
= unpack_varlen_hex (p
, &pnum
);
6923 /* If the first invalid character is the colon, we got a
6924 register number. Otherwise, it's an unknown stop
6928 /* If we haven't parsed the event's thread yet, find
6929 it now, in order to find the architecture of the
6930 reported expedited registers. */
6931 if (event
->ptid
== null_ptid
)
6933 const char *thr
= strstr (p1
+ 1, ";thread:");
6935 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
6938 event
->ptid
= magic_null_ptid
;
6943 inferior
*inf
= (event
->ptid
== null_ptid
6945 : find_inferior_ptid (event
->ptid
));
6946 /* If this is the first time we learn anything
6947 about this process, skip the registers
6948 included in this packet, since we don't yet
6949 know which architecture to use to parse them.
6950 We'll determine the architecture later when
6951 we process the stop reply and retrieve the
6952 target description, via
6953 remote_notice_new_inferior ->
6954 post_create_inferior. */
6957 p
= strchrnul (p1
+ 1, ';');
6962 event
->arch
= inf
->gdbarch
;
6963 rsa
= get_remote_arch_state (event
->arch
);
6967 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
6968 cached_reg_t cached_reg
;
6971 error (_("Remote sent bad register number %s: %s\n\
6973 hex_string (pnum
), p
, buf
);
6975 cached_reg
.num
= reg
->regnum
;
6976 cached_reg
.data
= (gdb_byte
*)
6977 xmalloc (register_size (event
->arch
, reg
->regnum
));
6980 fieldsize
= hex2bin (p
, cached_reg
.data
,
6981 register_size (event
->arch
, reg
->regnum
));
6983 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
6984 warning (_("Remote reply is too short: %s"), buf
);
6986 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
6990 /* Not a number. Silently skip unknown optional
6992 p
= strchrnul (p1
+ 1, ';');
6997 error (_("Remote register badly formatted: %s\nhere: %s"),
7002 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7006 case 'S': /* Old style status, just signal only. */
7010 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7011 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7012 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7013 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7015 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7018 case 'w': /* Thread exited. */
7023 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7024 p
= unpack_varlen_hex (&buf
[1], &value
);
7025 event
->ws
.value
.integer
= value
;
7027 error (_("stop reply packet badly formatted: %s"), buf
);
7028 event
->ptid
= read_ptid (++p
, NULL
);
7031 case 'W': /* Target exited. */
7038 /* GDB used to accept only 2 hex chars here. Stubs should
7039 only send more if they detect GDB supports multi-process
7041 p
= unpack_varlen_hex (&buf
[1], &value
);
7045 /* The remote process exited. */
7046 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7047 event
->ws
.value
.integer
= value
;
7051 /* The remote process exited with a signal. */
7052 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7053 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7054 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7056 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7059 /* If no process is specified, assume inferior_ptid. */
7060 pid
= ptid_get_pid (inferior_ptid
);
7069 else if (startswith (p
, "process:"))
7073 p
+= sizeof ("process:") - 1;
7074 unpack_varlen_hex (p
, &upid
);
7078 error (_("unknown stop reply packet: %s"), buf
);
7081 error (_("unknown stop reply packet: %s"), buf
);
7082 event
->ptid
= pid_to_ptid (pid
);
7086 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7087 event
->ptid
= minus_one_ptid
;
7091 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
7092 error (_("No process or thread specified in stop reply: %s"), buf
);
7095 /* When the stub wants to tell GDB about a new notification reply, it
7096 sends a notification (%Stop, for example). Those can come it at
7097 any time, hence, we have to make sure that any pending
7098 putpkt/getpkt sequence we're making is finished, before querying
7099 the stub for more events with the corresponding ack command
7100 (vStopped, for example). E.g., if we started a vStopped sequence
7101 immediately upon receiving the notification, something like this
7109 1.6) <-- (registers reply to step #1.3)
7111 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7114 To solve this, whenever we parse a %Stop notification successfully,
7115 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7116 doing whatever we were doing:
7122 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7123 2.5) <-- (registers reply to step #2.3)
7125 Eventualy after step #2.5, we return to the event loop, which
7126 notices there's an event on the
7127 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7128 associated callback --- the function below. At this point, we're
7129 always safe to start a vStopped sequence. :
7132 2.7) <-- T05 thread:2
7138 remote_notif_get_pending_events (struct notif_client
*nc
)
7140 struct remote_state
*rs
= get_remote_state ();
7142 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7145 fprintf_unfiltered (gdb_stdlog
,
7146 "notif: process: '%s' ack pending event\n",
7150 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7151 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7155 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7156 if (strcmp (rs
->buf
, "OK") == 0)
7159 remote_notif_ack (nc
, rs
->buf
);
7165 fprintf_unfiltered (gdb_stdlog
,
7166 "notif: process: '%s' no pending reply\n",
7171 /* Called when it is decided that STOP_REPLY holds the info of the
7172 event that is to be returned to the core. This function always
7173 destroys STOP_REPLY. */
7176 process_stop_reply (struct stop_reply
*stop_reply
,
7177 struct target_waitstatus
*status
)
7181 *status
= stop_reply
->ws
;
7182 ptid
= stop_reply
->ptid
;
7184 /* If no thread/process was reported by the stub, assume the current
7186 if (ptid_equal (ptid
, null_ptid
))
7187 ptid
= inferior_ptid
;
7189 if (status
->kind
!= TARGET_WAITKIND_EXITED
7190 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7191 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7193 /* Expedited registers. */
7194 if (stop_reply
->regcache
)
7196 struct regcache
*regcache
7197 = get_thread_arch_regcache (ptid
, stop_reply
->arch
);
7202 VEC_iterate (cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7205 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
7209 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7212 remote_notice_new_inferior (ptid
, 0);
7213 remote_thread_info
*remote_thr
= get_remote_thread_info (ptid
);
7214 remote_thr
->core
= stop_reply
->core
;
7215 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7216 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7217 remote_thr
->vcont_resumed
= 0;
7220 stop_reply_xfree (stop_reply
);
7224 /* The non-stop mode version of target_wait. */
7227 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7229 struct remote_state
*rs
= get_remote_state ();
7230 struct stop_reply
*stop_reply
;
7234 /* If in non-stop mode, get out of getpkt even if a
7235 notification is received. */
7237 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7238 0 /* forever */, &is_notif
);
7241 if (ret
!= -1 && !is_notif
)
7244 case 'E': /* Error of some sort. */
7245 /* We're out of sync with the target now. Did it continue
7246 or not? We can't tell which thread it was in non-stop,
7247 so just ignore this. */
7248 warning (_("Remote failure reply: %s"), rs
->buf
);
7250 case 'O': /* Console output. */
7251 remote_console_output (rs
->buf
+ 1);
7254 warning (_("Invalid remote reply: %s"), rs
->buf
);
7258 /* Acknowledge a pending stop reply that may have arrived in the
7260 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7261 remote_notif_get_pending_events (¬if_client_stop
);
7263 /* If indeed we noticed a stop reply, we're done. */
7264 stop_reply
= queued_stop_reply (ptid
);
7265 if (stop_reply
!= NULL
)
7266 return process_stop_reply (stop_reply
, status
);
7268 /* Still no event. If we're just polling for an event, then
7269 return to the event loop. */
7270 if (options
& TARGET_WNOHANG
)
7272 status
->kind
= TARGET_WAITKIND_IGNORE
;
7273 return minus_one_ptid
;
7276 /* Otherwise do a blocking wait. */
7277 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7278 1 /* forever */, &is_notif
);
7282 /* Wait until the remote machine stops, then return, storing status in
7283 STATUS just as `wait' would. */
7286 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7288 struct remote_state
*rs
= get_remote_state ();
7289 ptid_t event_ptid
= null_ptid
;
7291 struct stop_reply
*stop_reply
;
7295 status
->kind
= TARGET_WAITKIND_IGNORE
;
7296 status
->value
.integer
= 0;
7298 stop_reply
= queued_stop_reply (ptid
);
7299 if (stop_reply
!= NULL
)
7300 return process_stop_reply (stop_reply
, status
);
7302 if (rs
->cached_wait_status
)
7303 /* Use the cached wait status, but only once. */
7304 rs
->cached_wait_status
= 0;
7309 int forever
= ((options
& TARGET_WNOHANG
) == 0
7310 && wait_forever_enabled_p
);
7312 if (!rs
->waiting_for_stop_reply
)
7314 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7315 return minus_one_ptid
;
7318 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7319 _never_ wait for ever -> test on target_is_async_p().
7320 However, before we do that we need to ensure that the caller
7321 knows how to take the target into/out of async mode. */
7322 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7323 forever
, &is_notif
);
7325 /* GDB gets a notification. Return to core as this event is
7327 if (ret
!= -1 && is_notif
)
7328 return minus_one_ptid
;
7330 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7331 return minus_one_ptid
;
7336 /* Assume that the target has acknowledged Ctrl-C unless we receive
7337 an 'F' or 'O' packet. */
7338 if (buf
[0] != 'F' && buf
[0] != 'O')
7339 rs
->ctrlc_pending_p
= 0;
7343 case 'E': /* Error of some sort. */
7344 /* We're out of sync with the target now. Did it continue or
7345 not? Not is more likely, so report a stop. */
7346 rs
->waiting_for_stop_reply
= 0;
7348 warning (_("Remote failure reply: %s"), buf
);
7349 status
->kind
= TARGET_WAITKIND_STOPPED
;
7350 status
->value
.sig
= GDB_SIGNAL_0
;
7352 case 'F': /* File-I/O request. */
7353 /* GDB may access the inferior memory while handling the File-I/O
7354 request, but we don't want GDB accessing memory while waiting
7355 for a stop reply. See the comments in putpkt_binary. Set
7356 waiting_for_stop_reply to 0 temporarily. */
7357 rs
->waiting_for_stop_reply
= 0;
7358 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7359 rs
->ctrlc_pending_p
= 0;
7360 /* GDB handled the File-I/O request, and the target is running
7361 again. Keep waiting for events. */
7362 rs
->waiting_for_stop_reply
= 1;
7364 case 'N': case 'T': case 'S': case 'X': case 'W':
7366 struct stop_reply
*stop_reply
;
7368 /* There is a stop reply to handle. */
7369 rs
->waiting_for_stop_reply
= 0;
7372 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7375 event_ptid
= process_stop_reply (stop_reply
, status
);
7378 case 'O': /* Console output. */
7379 remote_console_output (buf
+ 1);
7382 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7384 /* Zero length reply means that we tried 'S' or 'C' and the
7385 remote system doesn't support it. */
7386 target_terminal::ours_for_output ();
7388 ("Can't send signals to this remote system. %s not sent.\n",
7389 gdb_signal_to_name (rs
->last_sent_signal
));
7390 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7391 target_terminal::inferior ();
7393 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7397 /* else fallthrough */
7399 warning (_("Invalid remote reply: %s"), buf
);
7403 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7404 return minus_one_ptid
;
7405 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7407 /* Nothing interesting happened. If we're doing a non-blocking
7408 poll, we're done. Otherwise, go back to waiting. */
7409 if (options
& TARGET_WNOHANG
)
7410 return minus_one_ptid
;
7414 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7415 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7417 if (!ptid_equal (event_ptid
, null_ptid
))
7418 record_currthread (rs
, event_ptid
);
7420 event_ptid
= inferior_ptid
;
7423 /* A process exit. Invalidate our notion of current thread. */
7424 record_currthread (rs
, minus_one_ptid
);
7429 /* Wait until the remote machine stops, then return, storing status in
7430 STATUS just as `wait' would. */
7433 remote_wait (struct target_ops
*ops
,
7434 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7438 if (target_is_non_stop_p ())
7439 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7441 event_ptid
= remote_wait_as (ptid
, status
, options
);
7443 if (target_is_async_p ())
7445 /* If there are are events left in the queue tell the event loop
7447 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7448 mark_async_event_handler (remote_async_inferior_event_token
);
7454 /* Fetch a single register using a 'p' packet. */
7457 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7459 struct gdbarch
*gdbarch
= regcache
->arch ();
7460 struct remote_state
*rs
= get_remote_state ();
7462 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7465 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7468 if (reg
->pnum
== -1)
7473 p
+= hexnumstr (p
, reg
->pnum
);
7476 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7480 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7484 case PACKET_UNKNOWN
:
7487 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7488 gdbarch_register_name (regcache
->arch (),
7493 /* If this register is unfetchable, tell the regcache. */
7496 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7500 /* Otherwise, parse and supply the value. */
7506 error (_("fetch_register_using_p: early buf termination"));
7508 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7511 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7515 /* Fetch the registers included in the target's 'g' packet. */
7518 send_g_packet (void)
7520 struct remote_state
*rs
= get_remote_state ();
7523 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7524 remote_send (&rs
->buf
, &rs
->buf_size
);
7526 /* We can get out of synch in various cases. If the first character
7527 in the buffer is not a hex character, assume that has happened
7528 and try to fetch another packet to read. */
7529 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7530 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7531 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7532 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7535 fprintf_unfiltered (gdb_stdlog
,
7536 "Bad register packet; fetching a new packet\n");
7537 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7540 buf_len
= strlen (rs
->buf
);
7542 /* Sanity check the received packet. */
7543 if (buf_len
% 2 != 0)
7544 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7550 process_g_packet (struct regcache
*regcache
)
7552 struct gdbarch
*gdbarch
= regcache
->arch ();
7553 struct remote_state
*rs
= get_remote_state ();
7554 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7559 buf_len
= strlen (rs
->buf
);
7561 /* Further sanity checks, with knowledge of the architecture. */
7562 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7563 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7564 "bytes): %s"), rsa
->sizeof_g_packet
, buf_len
/ 2, rs
->buf
);
7566 /* Save the size of the packet sent to us by the target. It is used
7567 as a heuristic when determining the max size of packets that the
7568 target can safely receive. */
7569 if (rsa
->actual_register_packet_size
== 0)
7570 rsa
->actual_register_packet_size
= buf_len
;
7572 /* If this is smaller than we guessed the 'g' packet would be,
7573 update our records. A 'g' reply that doesn't include a register's
7574 value implies either that the register is not available, or that
7575 the 'p' packet must be used. */
7576 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7578 long sizeof_g_packet
= buf_len
/ 2;
7580 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7582 long offset
= rsa
->regs
[i
].offset
;
7583 long reg_size
= register_size (gdbarch
, i
);
7585 if (rsa
->regs
[i
].pnum
== -1)
7588 if (offset
>= sizeof_g_packet
)
7589 rsa
->regs
[i
].in_g_packet
= 0;
7590 else if (offset
+ reg_size
> sizeof_g_packet
)
7591 error (_("Truncated register %d in remote 'g' packet"), i
);
7593 rsa
->regs
[i
].in_g_packet
= 1;
7596 /* Looks valid enough, we can assume this is the correct length
7597 for a 'g' packet. It's important not to adjust
7598 rsa->sizeof_g_packet if we have truncated registers otherwise
7599 this "if" won't be run the next time the method is called
7600 with a packet of the same size and one of the internal errors
7601 below will trigger instead. */
7602 rsa
->sizeof_g_packet
= sizeof_g_packet
;
7605 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7607 /* Unimplemented registers read as all bits zero. */
7608 memset (regs
, 0, rsa
->sizeof_g_packet
);
7610 /* Reply describes registers byte by byte, each byte encoded as two
7611 hex characters. Suck them all up, then supply them to the
7612 register cacheing/storage mechanism. */
7615 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7617 if (p
[0] == 0 || p
[1] == 0)
7618 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7619 internal_error (__FILE__
, __LINE__
,
7620 _("unexpected end of 'g' packet reply"));
7622 if (p
[0] == 'x' && p
[1] == 'x')
7623 regs
[i
] = 0; /* 'x' */
7625 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7629 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7631 struct packet_reg
*r
= &rsa
->regs
[i
];
7632 long reg_size
= register_size (gdbarch
, i
);
7636 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
7637 /* This shouldn't happen - we adjusted in_g_packet above. */
7638 internal_error (__FILE__
, __LINE__
,
7639 _("unexpected end of 'g' packet reply"));
7640 else if (rs
->buf
[r
->offset
* 2] == 'x')
7642 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7643 /* The register isn't available, mark it as such (at
7644 the same time setting the value to zero). */
7645 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7648 regcache_raw_supply (regcache
, r
->regnum
,
7655 fetch_registers_using_g (struct regcache
*regcache
)
7658 process_g_packet (regcache
);
7661 /* Make the remote selected traceframe match GDB's selected
7665 set_remote_traceframe (void)
7668 struct remote_state
*rs
= get_remote_state ();
7670 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7673 /* Avoid recursion, remote_trace_find calls us again. */
7674 rs
->remote_traceframe_number
= get_traceframe_number ();
7676 newnum
= target_trace_find (tfind_number
,
7677 get_traceframe_number (), 0, 0, NULL
);
7679 /* Should not happen. If it does, all bets are off. */
7680 if (newnum
!= get_traceframe_number ())
7681 warning (_("could not set remote traceframe"));
7685 remote_fetch_registers (struct target_ops
*ops
,
7686 struct regcache
*regcache
, int regnum
)
7688 struct gdbarch
*gdbarch
= regcache
->arch ();
7689 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7692 set_remote_traceframe ();
7693 set_general_thread (regcache_get_ptid (regcache
));
7697 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7699 gdb_assert (reg
!= NULL
);
7701 /* If this register might be in the 'g' packet, try that first -
7702 we are likely to read more than one register. If this is the
7703 first 'g' packet, we might be overly optimistic about its
7704 contents, so fall back to 'p'. */
7705 if (reg
->in_g_packet
)
7707 fetch_registers_using_g (regcache
);
7708 if (reg
->in_g_packet
)
7712 if (fetch_register_using_p (regcache
, reg
))
7715 /* This register is not available. */
7716 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7721 fetch_registers_using_g (regcache
);
7723 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7724 if (!rsa
->regs
[i
].in_g_packet
)
7725 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7727 /* This register is not available. */
7728 regcache_raw_supply (regcache
, i
, NULL
);
7732 /* Prepare to store registers. Since we may send them all (using a
7733 'G' request), we have to read out the ones we don't want to change
7737 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7739 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7742 /* Make sure the entire registers array is valid. */
7743 switch (packet_support (PACKET_P
))
7745 case PACKET_DISABLE
:
7746 case PACKET_SUPPORT_UNKNOWN
:
7747 /* Make sure all the necessary registers are cached. */
7748 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7749 if (rsa
->regs
[i
].in_g_packet
)
7750 regcache_raw_update (regcache
, rsa
->regs
[i
].regnum
);
7757 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7758 packet was not recognized. */
7761 store_register_using_P (const struct regcache
*regcache
,
7762 struct packet_reg
*reg
)
7764 struct gdbarch
*gdbarch
= regcache
->arch ();
7765 struct remote_state
*rs
= get_remote_state ();
7766 /* Try storing a single register. */
7767 char *buf
= rs
->buf
;
7768 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7771 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7774 if (reg
->pnum
== -1)
7777 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7778 p
= buf
+ strlen (buf
);
7779 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7780 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7782 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7784 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7789 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7790 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7791 case PACKET_UNKNOWN
:
7794 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7798 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7799 contents of the register cache buffer. FIXME: ignores errors. */
7802 store_registers_using_G (const struct regcache
*regcache
)
7804 struct remote_state
*rs
= get_remote_state ();
7805 remote_arch_state
*rsa
= get_remote_arch_state (regcache
->arch ());
7809 /* Extract all the registers in the regcache copying them into a
7814 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7815 memset (regs
, 0, rsa
->sizeof_g_packet
);
7816 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
7818 struct packet_reg
*r
= &rsa
->regs
[i
];
7821 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7825 /* Command describes registers byte by byte,
7826 each byte encoded as two hex characters. */
7829 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7831 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7832 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7833 error (_("Could not write registers; remote failure reply '%s'"),
7837 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7838 of the register cache buffer. FIXME: ignores errors. */
7841 remote_store_registers (struct target_ops
*ops
,
7842 struct regcache
*regcache
, int regnum
)
7844 struct gdbarch
*gdbarch
= regcache
->arch ();
7845 remote_arch_state
*rsa
= get_remote_arch_state (gdbarch
);
7848 set_remote_traceframe ();
7849 set_general_thread (regcache_get_ptid (regcache
));
7853 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
7855 gdb_assert (reg
!= NULL
);
7857 /* Always prefer to store registers using the 'P' packet if
7858 possible; we often change only a small number of registers.
7859 Sometimes we change a larger number; we'd need help from a
7860 higher layer to know to use 'G'. */
7861 if (store_register_using_P (regcache
, reg
))
7864 /* For now, don't complain if we have no way to write the
7865 register. GDB loses track of unavailable registers too
7866 easily. Some day, this may be an error. We don't have
7867 any way to read the register, either... */
7868 if (!reg
->in_g_packet
)
7871 store_registers_using_G (regcache
);
7875 store_registers_using_G (regcache
);
7877 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7878 if (!rsa
->regs
[i
].in_g_packet
)
7879 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7880 /* See above for why we do not issue an error here. */
7885 /* Return the number of hex digits in num. */
7888 hexnumlen (ULONGEST num
)
7892 for (i
= 0; num
!= 0; i
++)
7895 return std::max (i
, 1);
7898 /* Set BUF to the minimum number of hex digits representing NUM. */
7901 hexnumstr (char *buf
, ULONGEST num
)
7903 int len
= hexnumlen (num
);
7905 return hexnumnstr (buf
, num
, len
);
7909 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7912 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7918 for (i
= width
- 1; i
>= 0; i
--)
7920 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7927 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7930 remote_address_masked (CORE_ADDR addr
)
7932 unsigned int address_size
= remote_address_size
;
7934 /* If "remoteaddresssize" was not set, default to target address size. */
7936 address_size
= gdbarch_addr_bit (target_gdbarch ());
7938 if (address_size
> 0
7939 && address_size
< (sizeof (ULONGEST
) * 8))
7941 /* Only create a mask when that mask can safely be constructed
7942 in a ULONGEST variable. */
7945 mask
= (mask
<< address_size
) - 1;
7951 /* Determine whether the remote target supports binary downloading.
7952 This is accomplished by sending a no-op memory write of zero length
7953 to the target at the specified address. It does not suffice to send
7954 the whole packet, since many stubs strip the eighth bit and
7955 subsequently compute a wrong checksum, which causes real havoc with
7958 NOTE: This can still lose if the serial line is not eight-bit
7959 clean. In cases like this, the user should clear "remote
7963 check_binary_download (CORE_ADDR addr
)
7965 struct remote_state
*rs
= get_remote_state ();
7967 switch (packet_support (PACKET_X
))
7969 case PACKET_DISABLE
:
7973 case PACKET_SUPPORT_UNKNOWN
:
7979 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7981 p
+= hexnumstr (p
, (ULONGEST
) 0);
7985 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7986 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7988 if (rs
->buf
[0] == '\0')
7991 fprintf_unfiltered (gdb_stdlog
,
7992 "binary downloading NOT "
7993 "supported by target\n");
7994 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
7999 fprintf_unfiltered (gdb_stdlog
,
8000 "binary downloading supported by target\n");
8001 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8008 /* Helper function to resize the payload in order to try to get a good
8009 alignment. We try to write an amount of data such that the next write will
8010 start on an address aligned on REMOTE_ALIGN_WRITES. */
8013 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8015 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8018 /* Write memory data directly to the remote machine.
8019 This does not inform the data cache; the data cache uses this.
8020 HEADER is the starting part of the packet.
8021 MEMADDR is the address in the remote memory space.
8022 MYADDR is the address of the buffer in our space.
8023 LEN_UNITS is the number of addressable units to write.
8024 UNIT_SIZE is the length in bytes of an addressable unit.
8025 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8026 should send data as binary ('X'), or hex-encoded ('M').
8028 The function creates packet of the form
8029 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8031 where encoding of <DATA> is terminated by PACKET_FORMAT.
8033 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8036 Return the transferred status, error or OK (an
8037 'enum target_xfer_status' value). Save the number of addressable units
8038 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8040 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8041 exchange between gdb and the stub could look like (?? in place of the
8047 -> $M1000,3:eeeeffffeeee#??
8051 <- eeeeffffeeeedddd */
8053 static enum target_xfer_status
8054 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8055 const gdb_byte
*myaddr
, ULONGEST len_units
,
8056 int unit_size
, ULONGEST
*xfered_len_units
,
8057 char packet_format
, int use_length
)
8059 struct remote_state
*rs
= get_remote_state ();
8065 int payload_capacity_bytes
;
8066 int payload_length_bytes
;
8068 if (packet_format
!= 'X' && packet_format
!= 'M')
8069 internal_error (__FILE__
, __LINE__
,
8070 _("remote_write_bytes_aux: bad packet format"));
8073 return TARGET_XFER_EOF
;
8075 payload_capacity_bytes
= get_memory_write_packet_size ();
8077 /* The packet buffer will be large enough for the payload;
8078 get_memory_packet_size ensures this. */
8081 /* Compute the size of the actual payload by subtracting out the
8082 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8084 payload_capacity_bytes
-= strlen ("$,:#NN");
8086 /* The comma won't be used. */
8087 payload_capacity_bytes
+= 1;
8088 payload_capacity_bytes
-= strlen (header
);
8089 payload_capacity_bytes
-= hexnumlen (memaddr
);
8091 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8093 strcat (rs
->buf
, header
);
8094 p
= rs
->buf
+ strlen (header
);
8096 /* Compute a best guess of the number of bytes actually transfered. */
8097 if (packet_format
== 'X')
8099 /* Best guess at number of bytes that will fit. */
8100 todo_units
= std::min (len_units
,
8101 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8103 payload_capacity_bytes
-= hexnumlen (todo_units
);
8104 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8108 /* Number of bytes that will fit. */
8110 = std::min (len_units
,
8111 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8113 payload_capacity_bytes
-= hexnumlen (todo_units
);
8114 todo_units
= std::min (todo_units
,
8115 (payload_capacity_bytes
/ unit_size
) / 2);
8118 if (todo_units
<= 0)
8119 internal_error (__FILE__
, __LINE__
,
8120 _("minimum packet size too small to write data"));
8122 /* If we already need another packet, then try to align the end
8123 of this packet to a useful boundary. */
8124 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8125 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8127 /* Append "<memaddr>". */
8128 memaddr
= remote_address_masked (memaddr
);
8129 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8136 /* Append the length and retain its location and size. It may need to be
8137 adjusted once the packet body has been created. */
8139 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8147 /* Append the packet body. */
8148 if (packet_format
== 'X')
8150 /* Binary mode. Send target system values byte by byte, in
8151 increasing byte addresses. Only escape certain critical
8153 payload_length_bytes
=
8154 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8155 &units_written
, payload_capacity_bytes
);
8157 /* If not all TODO units fit, then we'll need another packet. Make
8158 a second try to keep the end of the packet aligned. Don't do
8159 this if the packet is tiny. */
8160 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8164 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8166 if (new_todo_units
!= units_written
)
8167 payload_length_bytes
=
8168 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8169 (gdb_byte
*) p
, &units_written
,
8170 payload_capacity_bytes
);
8173 p
+= payload_length_bytes
;
8174 if (use_length
&& units_written
< todo_units
)
8176 /* Escape chars have filled up the buffer prematurely,
8177 and we have actually sent fewer units than planned.
8178 Fix-up the length field of the packet. Use the same
8179 number of characters as before. */
8180 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8182 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8187 /* Normal mode: Send target system values byte by byte, in
8188 increasing byte addresses. Each byte is encoded as a two hex
8190 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8191 units_written
= todo_units
;
8194 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8195 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8197 if (rs
->buf
[0] == 'E')
8198 return TARGET_XFER_E_IO
;
8200 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8201 send fewer units than we'd planned. */
8202 *xfered_len_units
= (ULONGEST
) units_written
;
8203 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8206 /* Write memory data directly to the remote machine.
8207 This does not inform the data cache; the data cache uses this.
8208 MEMADDR is the address in the remote memory space.
8209 MYADDR is the address of the buffer in our space.
8210 LEN is the number of bytes.
8212 Return the transferred status, error or OK (an
8213 'enum target_xfer_status' value). Save the number of bytes
8214 transferred in *XFERED_LEN. Only transfer a single packet. */
8216 static enum target_xfer_status
8217 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
8218 int unit_size
, ULONGEST
*xfered_len
)
8220 const char *packet_format
= NULL
;
8222 /* Check whether the target supports binary download. */
8223 check_binary_download (memaddr
);
8225 switch (packet_support (PACKET_X
))
8228 packet_format
= "X";
8230 case PACKET_DISABLE
:
8231 packet_format
= "M";
8233 case PACKET_SUPPORT_UNKNOWN
:
8234 internal_error (__FILE__
, __LINE__
,
8235 _("remote_write_bytes: bad internal state"));
8237 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8240 return remote_write_bytes_aux (packet_format
,
8241 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8242 packet_format
[0], 1);
8245 /* Read memory data directly from the remote machine.
8246 This does not use the data cache; the data cache uses this.
8247 MEMADDR is the address in the remote memory space.
8248 MYADDR is the address of the buffer in our space.
8249 LEN_UNITS is the number of addressable memory units to read..
8250 UNIT_SIZE is the length in bytes of an addressable unit.
8252 Return the transferred status, error or OK (an
8253 'enum target_xfer_status' value). Save the number of bytes
8254 transferred in *XFERED_LEN_UNITS.
8256 See the comment of remote_write_bytes_aux for an example of
8257 memory read/write exchange between gdb and the stub. */
8259 static enum target_xfer_status
8260 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
8261 int unit_size
, ULONGEST
*xfered_len_units
)
8263 struct remote_state
*rs
= get_remote_state ();
8264 int buf_size_bytes
; /* Max size of packet output buffer. */
8269 buf_size_bytes
= get_memory_read_packet_size ();
8270 /* The packet buffer will be large enough for the payload;
8271 get_memory_packet_size ensures this. */
8273 /* Number of units that will fit. */
8274 todo_units
= std::min (len_units
,
8275 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8277 /* Construct "m"<memaddr>","<len>". */
8278 memaddr
= remote_address_masked (memaddr
);
8281 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8283 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8286 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8287 if (rs
->buf
[0] == 'E'
8288 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8289 && rs
->buf
[3] == '\0')
8290 return TARGET_XFER_E_IO
;
8291 /* Reply describes memory byte by byte, each byte encoded as two hex
8294 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8295 /* Return what we have. Let higher layers handle partial reads. */
8296 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8297 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8300 /* Using the set of read-only target sections of remote, read live
8303 For interface/parameters/return description see target.h,
8306 static enum target_xfer_status
8307 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
8308 ULONGEST memaddr
, ULONGEST len
,
8309 int unit_size
, ULONGEST
*xfered_len
)
8311 struct target_section
*secp
;
8312 struct target_section_table
*table
;
8314 secp
= target_section_by_addr (ops
, memaddr
);
8316 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8317 secp
->the_bfd_section
)
8320 struct target_section
*p
;
8321 ULONGEST memend
= memaddr
+ len
;
8323 table
= target_get_section_table (ops
);
8325 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8327 if (memaddr
>= p
->addr
)
8329 if (memend
<= p
->endaddr
)
8331 /* Entire transfer is within this section. */
8332 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8335 else if (memaddr
>= p
->endaddr
)
8337 /* This section ends before the transfer starts. */
8342 /* This section overlaps the transfer. Just do half. */
8343 len
= p
->endaddr
- memaddr
;
8344 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8351 return TARGET_XFER_EOF
;
8354 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8355 first if the requested memory is unavailable in traceframe.
8356 Otherwise, fall back to remote_read_bytes_1. */
8358 static enum target_xfer_status
8359 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
8360 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8361 ULONGEST
*xfered_len
)
8364 return TARGET_XFER_EOF
;
8366 if (get_traceframe_number () != -1)
8368 std::vector
<mem_range
> available
;
8370 /* If we fail to get the set of available memory, then the
8371 target does not support querying traceframe info, and so we
8372 attempt reading from the traceframe anyway (assuming the
8373 target implements the old QTro packet then). */
8374 if (traceframe_available_memory (&available
, memaddr
, len
))
8376 if (available
.empty () || available
[0].start
!= memaddr
)
8378 enum target_xfer_status res
;
8380 /* Don't read into the traceframe's available
8382 if (!available
.empty ())
8384 LONGEST oldlen
= len
;
8386 len
= available
[0].start
- memaddr
;
8387 gdb_assert (len
<= oldlen
);
8390 /* This goes through the topmost target again. */
8391 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8392 len
, unit_size
, xfered_len
);
8393 if (res
== TARGET_XFER_OK
)
8394 return TARGET_XFER_OK
;
8397 /* No use trying further, we know some memory starting
8398 at MEMADDR isn't available. */
8400 return (*xfered_len
!= 0) ?
8401 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8405 /* Don't try to read more than how much is available, in
8406 case the target implements the deprecated QTro packet to
8407 cater for older GDBs (the target's knowledge of read-only
8408 sections may be outdated by now). */
8409 len
= available
[0].length
;
8413 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8418 /* Sends a packet with content determined by the printf format string
8419 FORMAT and the remaining arguments, then gets the reply. Returns
8420 whether the packet was a success, a failure, or unknown. */
8422 static enum packet_result
remote_send_printf (const char *format
, ...)
8423 ATTRIBUTE_PRINTF (1, 2);
8425 static enum packet_result
8426 remote_send_printf (const char *format
, ...)
8428 struct remote_state
*rs
= get_remote_state ();
8429 int max_size
= get_remote_packet_size ();
8432 va_start (ap
, format
);
8435 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8436 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8438 if (putpkt (rs
->buf
) < 0)
8439 error (_("Communication problem with target."));
8442 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8444 return packet_check_result (rs
->buf
);
8447 /* Flash writing can take quite some time. We'll set
8448 effectively infinite timeout for flash operations.
8449 In future, we'll need to decide on a better approach. */
8450 static const int remote_flash_timeout
= 1000;
8453 remote_flash_erase (struct target_ops
*ops
,
8454 ULONGEST address
, LONGEST length
)
8456 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8457 enum packet_result ret
;
8458 scoped_restore restore_timeout
8459 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8461 ret
= remote_send_printf ("vFlashErase:%s,%s",
8462 phex (address
, addr_size
),
8466 case PACKET_UNKNOWN
:
8467 error (_("Remote target does not support flash erase"));
8469 error (_("Error erasing flash with vFlashErase packet"));
8475 static enum target_xfer_status
8476 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8477 ULONGEST length
, ULONGEST
*xfered_len
,
8478 const gdb_byte
*data
)
8480 scoped_restore restore_timeout
8481 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8482 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8487 remote_flash_done (struct target_ops
*ops
)
8491 scoped_restore restore_timeout
8492 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8494 ret
= remote_send_printf ("vFlashDone");
8498 case PACKET_UNKNOWN
:
8499 error (_("Remote target does not support vFlashDone"));
8501 error (_("Error finishing flash operation"));
8508 remote_files_info (struct target_ops
*ignore
)
8510 puts_filtered ("Debugging a target over a serial line.\n");
8513 /* Stuff for dealing with the packets which are part of this protocol.
8514 See comment at top of file for details. */
8516 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8517 error to higher layers. Called when a serial error is detected.
8518 The exception message is STRING, followed by a colon and a blank,
8519 the system error message for errno at function entry and final dot
8520 for output compatibility with throw_perror_with_name. */
8523 unpush_and_perror (const char *string
)
8525 int saved_errno
= errno
;
8527 remote_unpush_target ();
8528 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8529 safe_strerror (saved_errno
));
8532 /* Read a single character from the remote end. The current quit
8533 handler is overridden to avoid quitting in the middle of packet
8534 sequence, as that would break communication with the remote server.
8535 See remote_serial_quit_handler for more detail. */
8538 readchar (int timeout
)
8541 struct remote_state
*rs
= get_remote_state ();
8544 scoped_restore restore_quit
8545 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8547 rs
->got_ctrlc_during_io
= 0;
8549 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8551 if (rs
->got_ctrlc_during_io
)
8558 switch ((enum serial_rc
) ch
)
8561 remote_unpush_target ();
8562 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8565 unpush_and_perror (_("Remote communication error. "
8566 "Target disconnected."));
8568 case SERIAL_TIMEOUT
:
8574 /* Wrapper for serial_write that closes the target and throws if
8575 writing fails. The current quit handler is overridden to avoid
8576 quitting in the middle of packet sequence, as that would break
8577 communication with the remote server. See
8578 remote_serial_quit_handler for more detail. */
8581 remote_serial_write (const char *str
, int len
)
8583 struct remote_state
*rs
= get_remote_state ();
8585 scoped_restore restore_quit
8586 = make_scoped_restore (&quit_handler
, remote_serial_quit_handler
);
8588 rs
->got_ctrlc_during_io
= 0;
8590 if (serial_write (rs
->remote_desc
, str
, len
))
8592 unpush_and_perror (_("Remote communication error. "
8593 "Target disconnected."));
8596 if (rs
->got_ctrlc_during_io
)
8600 /* Send the command in *BUF to the remote machine, and read the reply
8601 into *BUF. Report an error if we get an error reply. Resize
8602 *BUF using xrealloc if necessary to hold the result, and update
8606 remote_send (char **buf
,
8610 getpkt (buf
, sizeof_buf
, 0);
8612 if ((*buf
)[0] == 'E')
8613 error (_("Remote failure reply: %s"), *buf
);
8616 /* Return a string representing an escaped version of BUF, of len N.
8617 E.g. \n is converted to \\n, \t to \\t, etc. */
8620 escape_buffer (const char *buf
, int n
)
8624 stb
.putstrn (buf
, n
, '\\');
8625 return std::move (stb
.string ());
8628 /* Display a null-terminated packet on stdout, for debugging, using C
8632 print_packet (const char *buf
)
8634 puts_filtered ("\"");
8635 fputstr_filtered (buf
, '"', gdb_stdout
);
8636 puts_filtered ("\"");
8640 putpkt (const char *buf
)
8642 return putpkt_binary (buf
, strlen (buf
));
8645 /* Send a packet to the remote machine, with error checking. The data
8646 of the packet is in BUF. The string in BUF can be at most
8647 get_remote_packet_size () - 5 to account for the $, # and checksum,
8648 and for a possible /0 if we are debugging (remote_debug) and want
8649 to print the sent packet as a string. */
8652 putpkt_binary (const char *buf
, int cnt
)
8654 struct remote_state
*rs
= get_remote_state ();
8656 unsigned char csum
= 0;
8657 gdb::def_vector
<char> data (cnt
+ 6);
8658 char *buf2
= data
.data ();
8664 /* Catch cases like trying to read memory or listing threads while
8665 we're waiting for a stop reply. The remote server wouldn't be
8666 ready to handle this request, so we'd hang and timeout. We don't
8667 have to worry about this in synchronous mode, because in that
8668 case it's not possible to issue a command while the target is
8669 running. This is not a problem in non-stop mode, because in that
8670 case, the stub is always ready to process serial input. */
8671 if (!target_is_non_stop_p ()
8672 && target_is_async_p ()
8673 && rs
->waiting_for_stop_reply
)
8675 error (_("Cannot execute this command while the target is running.\n"
8676 "Use the \"interrupt\" command to stop the target\n"
8677 "and then try again."));
8680 /* We're sending out a new packet. Make sure we don't look at a
8681 stale cached response. */
8682 rs
->cached_wait_status
= 0;
8684 /* Copy the packet into buffer BUF2, encapsulating it
8685 and giving it a checksum. */
8690 for (i
= 0; i
< cnt
; i
++)
8696 *p
++ = tohex ((csum
>> 4) & 0xf);
8697 *p
++ = tohex (csum
& 0xf);
8699 /* Send it over and over until we get a positive ack. */
8703 int started_error_output
= 0;
8709 int len
= (int) (p
- buf2
);
8712 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
8714 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
8716 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
8718 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
8719 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
8722 fprintf_unfiltered (gdb_stdlog
, "...");
8724 gdb_flush (gdb_stdlog
);
8726 remote_serial_write (buf2
, p
- buf2
);
8728 /* If this is a no acks version of the remote protocol, send the
8729 packet and move on. */
8733 /* Read until either a timeout occurs (-2) or '+' is read.
8734 Handle any notification that arrives in the mean time. */
8737 ch
= readchar (remote_timeout
);
8745 case SERIAL_TIMEOUT
:
8748 if (started_error_output
)
8750 putchar_unfiltered ('\n');
8751 started_error_output
= 0;
8760 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8764 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8766 case SERIAL_TIMEOUT
:
8770 break; /* Retransmit buffer. */
8774 fprintf_unfiltered (gdb_stdlog
,
8775 "Packet instead of Ack, ignoring it\n");
8776 /* It's probably an old response sent because an ACK
8777 was lost. Gobble up the packet and ack it so it
8778 doesn't get retransmitted when we resend this
8781 remote_serial_write ("+", 1);
8782 continue; /* Now, go look for +. */
8789 /* If we got a notification, handle it, and go back to looking
8791 /* We've found the start of a notification. Now
8792 collect the data. */
8793 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8798 std::string str
= escape_buffer (rs
->buf
, val
);
8800 fprintf_unfiltered (gdb_stdlog
,
8801 " Notification received: %s\n",
8804 handle_notification (rs
->notif_state
, rs
->buf
);
8805 /* We're in sync now, rewait for the ack. */
8812 if (!started_error_output
)
8814 started_error_output
= 1;
8815 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8817 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8818 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8827 if (!started_error_output
)
8829 started_error_output
= 1;
8830 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8832 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8836 break; /* Here to retransmit. */
8840 /* This is wrong. If doing a long backtrace, the user should be
8841 able to get out next time we call QUIT, without anything as
8842 violent as interrupt_query. If we want to provide a way out of
8843 here without getting to the next QUIT, it should be based on
8844 hitting ^C twice as in remote_wait. */
8856 /* Come here after finding the start of a frame when we expected an
8857 ack. Do our best to discard the rest of this packet. */
8866 c
= readchar (remote_timeout
);
8869 case SERIAL_TIMEOUT
:
8870 /* Nothing we can do. */
8873 /* Discard the two bytes of checksum and stop. */
8874 c
= readchar (remote_timeout
);
8876 c
= readchar (remote_timeout
);
8879 case '*': /* Run length encoding. */
8880 /* Discard the repeat count. */
8881 c
= readchar (remote_timeout
);
8886 /* A regular character. */
8892 /* Come here after finding the start of the frame. Collect the rest
8893 into *BUF, verifying the checksum, length, and handling run-length
8894 compression. NUL terminate the buffer. If there is not enough room,
8895 expand *BUF using xrealloc.
8897 Returns -1 on error, number of characters in buffer (ignoring the
8898 trailing NULL) on success. (could be extended to return one of the
8899 SERIAL status indications). */
8902 read_frame (char **buf_p
,
8909 struct remote_state
*rs
= get_remote_state ();
8916 c
= readchar (remote_timeout
);
8919 case SERIAL_TIMEOUT
:
8921 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8925 fputs_filtered ("Saw new packet start in middle of old one\n",
8927 return -1; /* Start a new packet, count retries. */
8930 unsigned char pktcsum
;
8936 check_0
= readchar (remote_timeout
);
8938 check_1
= readchar (remote_timeout
);
8940 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
8943 fputs_filtered ("Timeout in checksum, retrying\n",
8947 else if (check_0
< 0 || check_1
< 0)
8950 fputs_filtered ("Communication error in checksum\n",
8955 /* Don't recompute the checksum; with no ack packets we
8956 don't have any way to indicate a packet retransmission
8961 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
8962 if (csum
== pktcsum
)
8967 std::string str
= escape_buffer (buf
, bc
);
8969 fprintf_unfiltered (gdb_stdlog
,
8970 "Bad checksum, sentsum=0x%x, "
8971 "csum=0x%x, buf=%s\n",
8972 pktcsum
, csum
, str
.c_str ());
8974 /* Number of characters in buffer ignoring trailing
8978 case '*': /* Run length encoding. */
8983 c
= readchar (remote_timeout
);
8985 repeat
= c
- ' ' + 3; /* Compute repeat count. */
8987 /* The character before ``*'' is repeated. */
8989 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
8991 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
8993 /* Make some more room in the buffer. */
8994 *sizeof_buf
+= repeat
;
8995 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
8999 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9005 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9009 if (bc
>= *sizeof_buf
- 1)
9011 /* Make some more room in the buffer. */
9013 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9024 /* Read a packet from the remote machine, with error checking, and
9025 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9026 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9027 rather than timing out; this is used (in synchronous mode) to wait
9028 for a target that is is executing user code to stop. */
9029 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9030 don't have to change all the calls to getpkt to deal with the
9031 return value, because at the moment I don't know what the right
9032 thing to do it for those. */
9038 getpkt_sane (buf
, sizeof_buf
, forever
);
9042 /* Read a packet from the remote machine, with error checking, and
9043 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9044 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9045 rather than timing out; this is used (in synchronous mode) to wait
9046 for a target that is is executing user code to stop. If FOREVER ==
9047 0, this function is allowed to time out gracefully and return an
9048 indication of this to the caller. Otherwise return the number of
9049 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9050 enough reason to return to the caller. *IS_NOTIF is an output
9051 boolean that indicates whether *BUF holds a notification or not
9052 (a regular packet). */
9055 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
9056 int expecting_notif
, int *is_notif
)
9058 struct remote_state
*rs
= get_remote_state ();
9064 /* We're reading a new response. Make sure we don't look at a
9065 previously cached response. */
9066 rs
->cached_wait_status
= 0;
9068 strcpy (*buf
, "timeout");
9071 timeout
= watchdog
> 0 ? watchdog
: -1;
9072 else if (expecting_notif
)
9073 timeout
= 0; /* There should already be a char in the buffer. If
9076 timeout
= remote_timeout
;
9080 /* Process any number of notifications, and then return when
9084 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9086 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9088 /* This can loop forever if the remote side sends us
9089 characters continuously, but if it pauses, we'll get
9090 SERIAL_TIMEOUT from readchar because of timeout. Then
9091 we'll count that as a retry.
9093 Note that even when forever is set, we will only wait
9094 forever prior to the start of a packet. After that, we
9095 expect characters to arrive at a brisk pace. They should
9096 show up within remote_timeout intervals. */
9098 c
= readchar (timeout
);
9099 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9101 if (c
== SERIAL_TIMEOUT
)
9103 if (expecting_notif
)
9104 return -1; /* Don't complain, it's normal to not get
9105 anything in this case. */
9107 if (forever
) /* Watchdog went off? Kill the target. */
9109 remote_unpush_target ();
9110 throw_error (TARGET_CLOSE_ERROR
,
9111 _("Watchdog timeout has expired. "
9112 "Target detached."));
9115 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9119 /* We've found the start of a packet or notification.
9120 Now collect the data. */
9121 val
= read_frame (buf
, sizeof_buf
);
9126 remote_serial_write ("-", 1);
9129 if (tries
> MAX_TRIES
)
9131 /* We have tried hard enough, and just can't receive the
9132 packet/notification. Give up. */
9133 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9135 /* Skip the ack char if we're in no-ack mode. */
9136 if (!rs
->noack_mode
)
9137 remote_serial_write ("+", 1);
9141 /* If we got an ordinary packet, return that to our caller. */
9147 = escape_buffer (*buf
,
9148 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9150 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9153 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
9155 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
9156 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
9159 fprintf_unfiltered (gdb_stdlog
, "\n");
9162 /* Skip the ack char if we're in no-ack mode. */
9163 if (!rs
->noack_mode
)
9164 remote_serial_write ("+", 1);
9165 if (is_notif
!= NULL
)
9170 /* If we got a notification, handle it, and go back to looking
9174 gdb_assert (c
== '%');
9178 std::string str
= escape_buffer (*buf
, val
);
9180 fprintf_unfiltered (gdb_stdlog
,
9181 " Notification received: %s\n",
9184 if (is_notif
!= NULL
)
9187 handle_notification (rs
->notif_state
, *buf
);
9189 /* Notifications require no acknowledgement. */
9191 if (expecting_notif
)
9198 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9200 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9204 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9207 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9211 /* Check whether EVENT is a fork event for the process specified
9212 by the pid passed in DATA, and if it is, kill the fork child. */
9215 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
9216 QUEUE_ITER (stop_reply_p
) *iter
,
9220 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
9221 int parent_pid
= *(int *) param
->input
;
9223 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
9225 struct remote_state
*rs
= get_remote_state ();
9226 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
9229 res
= remote_vkill (child_pid
, rs
);
9231 error (_("Can't kill fork child process %d"), child_pid
);
9237 /* Kill any new fork children of process PID that haven't been
9238 processed by follow_fork. */
9241 kill_new_fork_children (int pid
, struct remote_state
*rs
)
9243 struct thread_info
*thread
;
9244 struct notif_client
*notif
= ¬if_client_stop
;
9245 struct queue_iter_param param
;
9247 /* Kill the fork child threads of any threads in process PID
9248 that are stopped at a fork event. */
9249 ALL_NON_EXITED_THREADS (thread
)
9251 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9253 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9255 struct remote_state
*rs
= get_remote_state ();
9256 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
9259 res
= remote_vkill (child_pid
, rs
);
9261 error (_("Can't kill fork child process %d"), child_pid
);
9265 /* Check for any pending fork events (not reported or processed yet)
9266 in process PID and kill those fork child threads as well. */
9267 remote_notif_get_pending_events (notif
);
9269 param
.output
= NULL
;
9270 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
9271 kill_child_of_pending_fork
, ¶m
);
9275 /* Target hook to kill the current inferior. */
9278 remote_kill (struct target_ops
*ops
)
9281 int pid
= ptid_get_pid (inferior_ptid
);
9282 struct remote_state
*rs
= get_remote_state ();
9284 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9286 /* If we're stopped while forking and we haven't followed yet,
9287 kill the child task. We need to do this before killing the
9288 parent task because if this is a vfork then the parent will
9290 kill_new_fork_children (pid
, rs
);
9292 res
= remote_vkill (pid
, rs
);
9295 target_mourn_inferior (inferior_ptid
);
9300 /* If we are in 'target remote' mode and we are killing the only
9301 inferior, then we will tell gdbserver to exit and unpush the
9303 if (res
== -1 && !remote_multi_process_p (rs
)
9304 && number_of_live_inferiors () == 1)
9308 /* We've killed the remote end, we get to mourn it. If we are
9309 not in extended mode, mourning the inferior also unpushes
9310 remote_ops from the target stack, which closes the remote
9312 target_mourn_inferior (inferior_ptid
);
9317 error (_("Can't kill process"));
9320 /* Send a kill request to the target using the 'vKill' packet. */
9323 remote_vkill (int pid
, struct remote_state
*rs
)
9325 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9328 /* Tell the remote target to detach. */
9329 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9331 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9333 switch (packet_ok (rs
->buf
,
9334 &remote_protocol_packets
[PACKET_vKill
]))
9340 case PACKET_UNKNOWN
:
9343 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9347 /* Send a kill request to the target using the 'k' packet. */
9350 remote_kill_k (void)
9352 /* Catch errors so the user can quit from gdb even when we
9353 aren't on speaking terms with the remote system. */
9358 CATCH (ex
, RETURN_MASK_ERROR
)
9360 if (ex
.error
== TARGET_CLOSE_ERROR
)
9362 /* If we got an (EOF) error that caused the target
9363 to go away, then we're done, that's what we wanted.
9364 "k" is susceptible to cause a premature EOF, given
9365 that the remote server isn't actually required to
9366 reply to "k", and it can happen that it doesn't
9367 even get to reply ACK to the "k". */
9371 /* Otherwise, something went wrong. We didn't actually kill
9372 the target. Just propagate the exception, and let the
9373 user or higher layers decide what to do. */
9374 throw_exception (ex
);
9380 remote_mourn (struct target_ops
*target
)
9382 struct remote_state
*rs
= get_remote_state ();
9384 /* In 'target remote' mode with one inferior, we close the connection. */
9385 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9387 unpush_target (target
);
9389 /* remote_close takes care of doing most of the clean up. */
9390 generic_mourn_inferior ();
9394 /* In case we got here due to an error, but we're going to stay
9396 rs
->waiting_for_stop_reply
= 0;
9398 /* If the current general thread belonged to the process we just
9399 detached from or has exited, the remote side current general
9400 thread becomes undefined. Considering a case like this:
9402 - We just got here due to a detach.
9403 - The process that we're detaching from happens to immediately
9404 report a global breakpoint being hit in non-stop mode, in the
9405 same thread we had selected before.
9406 - GDB attaches to this process again.
9407 - This event happens to be the next event we handle.
9409 GDB would consider that the current general thread didn't need to
9410 be set on the stub side (with Hg), since for all it knew,
9411 GENERAL_THREAD hadn't changed.
9413 Notice that although in all-stop mode, the remote server always
9414 sets the current thread to the thread reporting the stop event,
9415 that doesn't happen in non-stop mode; in non-stop, the stub *must
9416 not* change the current thread when reporting a breakpoint hit,
9417 due to the decoupling of event reporting and event handling.
9419 To keep things simple, we always invalidate our notion of the
9421 record_currthread (rs
, minus_one_ptid
);
9423 /* Call common code to mark the inferior as not running. */
9424 generic_mourn_inferior ();
9426 if (!have_inferiors ())
9428 if (!remote_multi_process_p (rs
))
9430 /* Check whether the target is running now - some remote stubs
9431 automatically restart after kill. */
9433 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9435 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9437 /* Assume that the target has been restarted. Set
9438 inferior_ptid so that bits of core GDB realizes
9439 there's something here, e.g., so that the user can
9440 say "kill" again. */
9441 inferior_ptid
= magic_null_ptid
;
9448 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9450 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9454 extended_remote_disable_randomization (int val
)
9456 struct remote_state
*rs
= get_remote_state ();
9459 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9462 reply
= remote_get_noisy_reply ();
9464 error (_("Target does not support QDisableRandomization."));
9465 if (strcmp (reply
, "OK") != 0)
9466 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9470 extended_remote_run (const std::string
&args
)
9472 struct remote_state
*rs
= get_remote_state ();
9474 const char *remote_exec_file
= get_remote_exec_file ();
9476 /* If the user has disabled vRun support, or we have detected that
9477 support is not available, do not try it. */
9478 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9481 strcpy (rs
->buf
, "vRun;");
9482 len
= strlen (rs
->buf
);
9484 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9485 error (_("Remote file name too long for run packet"));
9486 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9487 strlen (remote_exec_file
));
9493 gdb_argv
argv (args
.c_str ());
9494 for (i
= 0; argv
[i
] != NULL
; i
++)
9496 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9497 error (_("Argument list too long for run packet"));
9498 rs
->buf
[len
++] = ';';
9499 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9504 rs
->buf
[len
++] = '\0';
9507 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9509 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9512 /* We have a wait response. All is well. */
9514 case PACKET_UNKNOWN
:
9517 if (remote_exec_file
[0] == '\0')
9518 error (_("Running the default executable on the remote target failed; "
9519 "try \"set remote exec-file\"?"));
9521 error (_("Running \"%s\" on the remote target failed"),
9524 gdb_assert_not_reached (_("bad switch"));
9528 /* Helper function to send set/unset environment packets. ACTION is
9529 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9530 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9534 send_environment_packet (struct remote_state
*rs
,
9539 /* Convert the environment variable to an hex string, which
9540 is the best format to be transmitted over the wire. */
9541 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
9544 xsnprintf (rs
->buf
, get_remote_packet_size (),
9545 "%s:%s", packet
, encoded_value
.c_str ());
9548 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9549 if (strcmp (rs
->buf
, "OK") != 0)
9550 warning (_("Unable to %s environment variable '%s' on remote."),
9554 /* Helper function to handle the QEnvironment* packets. */
9557 extended_remote_environment_support (struct remote_state
*rs
)
9559 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
9561 putpkt ("QEnvironmentReset");
9562 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9563 if (strcmp (rs
->buf
, "OK") != 0)
9564 warning (_("Unable to reset environment on remote."));
9567 gdb_environ
*e
= ¤t_inferior ()->environment
;
9569 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
9570 for (const std::string
&el
: e
->user_set_env ())
9571 send_environment_packet (rs
, "set", "QEnvironmentHexEncoded",
9574 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
9575 for (const std::string
&el
: e
->user_unset_env ())
9576 send_environment_packet (rs
, "unset", "QEnvironmentUnset", el
.c_str ());
9579 /* Helper function to set the current working directory for the
9580 inferior in the remote target. */
9583 extended_remote_set_inferior_cwd (struct remote_state
*rs
)
9585 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
9587 const char *inferior_cwd
= get_inferior_cwd ();
9589 if (inferior_cwd
!= NULL
)
9591 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
9592 strlen (inferior_cwd
));
9594 xsnprintf (rs
->buf
, get_remote_packet_size (),
9595 "QSetWorkingDir:%s", hexpath
.c_str ());
9599 /* An empty inferior_cwd means that the user wants us to
9600 reset the remote server's inferior's cwd. */
9601 xsnprintf (rs
->buf
, get_remote_packet_size (),
9606 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9607 if (packet_ok (rs
->buf
,
9608 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
9611 Remote replied unexpectedly while setting the inferior's working\n\
9618 /* In the extended protocol we want to be able to do things like
9619 "run" and have them basically work as expected. So we need
9620 a special create_inferior function. We support changing the
9621 executable file and the command line arguments, but not the
9625 extended_remote_create_inferior (struct target_ops
*ops
,
9626 const char *exec_file
,
9627 const std::string
&args
,
9628 char **env
, int from_tty
)
9632 struct remote_state
*rs
= get_remote_state ();
9633 const char *remote_exec_file
= get_remote_exec_file ();
9635 /* If running asynchronously, register the target file descriptor
9636 with the event loop. */
9637 if (target_can_async_p ())
9640 /* Disable address space randomization if requested (and supported). */
9641 if (extended_remote_supports_disable_randomization (ops
))
9642 extended_remote_disable_randomization (disable_randomization
);
9644 /* If startup-with-shell is on, we inform gdbserver to start the
9645 remote inferior using a shell. */
9646 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
9648 xsnprintf (rs
->buf
, get_remote_packet_size (),
9649 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
9651 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9652 if (strcmp (rs
->buf
, "OK") != 0)
9654 Remote replied unexpectedly while setting startup-with-shell: %s"),
9658 extended_remote_environment_support (rs
);
9660 extended_remote_set_inferior_cwd (rs
);
9662 /* Now restart the remote server. */
9663 run_worked
= extended_remote_run (args
) != -1;
9666 /* vRun was not supported. Fail if we need it to do what the
9668 if (remote_exec_file
[0])
9669 error (_("Remote target does not support \"set remote exec-file\""));
9671 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9673 /* Fall back to "R". */
9674 extended_remote_restart ();
9677 if (!have_inferiors ())
9679 /* Clean up from the last time we ran, before we mark the target
9680 running again. This will mark breakpoints uninserted, and
9681 get_offsets may insert breakpoints. */
9682 init_thread_list ();
9683 init_wait_for_inferior ();
9686 /* vRun's success return is a stop reply. */
9687 stop_reply
= run_worked
? rs
->buf
: NULL
;
9688 add_current_inferior_and_thread (stop_reply
);
9690 /* Get updated offsets, if the stub uses qOffsets. */
9695 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9696 the list of conditions (in agent expression bytecode format), if any, the
9697 target needs to evaluate. The output is placed into the packet buffer
9698 started from BUF and ended at BUF_END. */
9701 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9702 struct bp_target_info
*bp_tgt
, char *buf
,
9705 if (bp_tgt
->conditions
.empty ())
9708 buf
+= strlen (buf
);
9709 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9712 /* Send conditions to the target. */
9713 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
9715 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9716 buf
+= strlen (buf
);
9717 for (int i
= 0; i
< aexpr
->len
; ++i
)
9718 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9725 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9726 struct bp_target_info
*bp_tgt
, char *buf
)
9728 if (bp_tgt
->tcommands
.empty ())
9731 buf
+= strlen (buf
);
9733 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9734 buf
+= strlen (buf
);
9736 /* Concatenate all the agent expressions that are commands into the
9738 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
9740 sprintf (buf
, "X%x,", aexpr
->len
);
9741 buf
+= strlen (buf
);
9742 for (int i
= 0; i
< aexpr
->len
; ++i
)
9743 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9748 /* Insert a breakpoint. On targets that have software breakpoint
9749 support, we ask the remote target to do the work; on targets
9750 which don't, we insert a traditional memory breakpoint. */
9753 remote_insert_breakpoint (struct target_ops
*ops
,
9754 struct gdbarch
*gdbarch
,
9755 struct bp_target_info
*bp_tgt
)
9757 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9758 If it succeeds, then set the support to PACKET_ENABLE. If it
9759 fails, and the user has explicitly requested the Z support then
9760 report an error, otherwise, mark it disabled and go on. */
9762 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9764 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9765 struct remote_state
*rs
;
9768 /* Make sure the remote is pointing at the right process, if
9770 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9771 set_general_process ();
9773 rs
= get_remote_state ();
9775 endbuf
= rs
->buf
+ get_remote_packet_size ();
9780 addr
= (ULONGEST
) remote_address_masked (addr
);
9781 p
+= hexnumstr (p
, addr
);
9782 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9784 if (remote_supports_cond_breakpoints (ops
))
9785 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9787 if (remote_can_run_breakpoint_commands (ops
))
9788 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9791 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9793 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9799 case PACKET_UNKNOWN
:
9804 /* If this breakpoint has target-side commands but this stub doesn't
9805 support Z0 packets, throw error. */
9806 if (!bp_tgt
->tcommands
.empty ())
9807 throw_error (NOT_SUPPORTED_ERROR
, _("\
9808 Target doesn't support breakpoints that have target side commands."));
9810 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9814 remote_remove_breakpoint (struct target_ops
*ops
,
9815 struct gdbarch
*gdbarch
,
9816 struct bp_target_info
*bp_tgt
,
9817 enum remove_bp_reason reason
)
9819 CORE_ADDR addr
= bp_tgt
->placed_address
;
9820 struct remote_state
*rs
= get_remote_state ();
9822 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9825 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9827 /* Make sure the remote is pointing at the right process, if
9829 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9830 set_general_process ();
9836 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9837 p
+= hexnumstr (p
, addr
);
9838 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9841 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9843 return (rs
->buf
[0] == 'E');
9846 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
, reason
);
9849 static enum Z_packet_type
9850 watchpoint_to_Z_packet (int type
)
9855 return Z_PACKET_WRITE_WP
;
9858 return Z_PACKET_READ_WP
;
9861 return Z_PACKET_ACCESS_WP
;
9864 internal_error (__FILE__
, __LINE__
,
9865 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9870 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9871 enum target_hw_bp_type type
, struct expression
*cond
)
9873 struct remote_state
*rs
= get_remote_state ();
9874 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9876 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9878 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9881 /* Make sure the remote is pointing at the right process, if
9883 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9884 set_general_process ();
9886 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9887 p
= strchr (rs
->buf
, '\0');
9888 addr
= remote_address_masked (addr
);
9889 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9890 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9893 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9895 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9899 case PACKET_UNKNOWN
:
9904 internal_error (__FILE__
, __LINE__
,
9905 _("remote_insert_watchpoint: reached end of function"));
9909 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9910 CORE_ADDR start
, int length
)
9912 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9914 return diff
< length
;
9919 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9920 enum target_hw_bp_type type
, struct expression
*cond
)
9922 struct remote_state
*rs
= get_remote_state ();
9923 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9925 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9927 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9930 /* Make sure the remote is pointing at the right process, if
9932 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9933 set_general_process ();
9935 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
9936 p
= strchr (rs
->buf
, '\0');
9937 addr
= remote_address_masked (addr
);
9938 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9939 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9941 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9943 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9946 case PACKET_UNKNOWN
:
9951 internal_error (__FILE__
, __LINE__
,
9952 _("remote_remove_watchpoint: reached end of function"));
9956 int remote_hw_watchpoint_limit
= -1;
9957 int remote_hw_watchpoint_length_limit
= -1;
9958 int remote_hw_breakpoint_limit
= -1;
9961 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
9962 CORE_ADDR addr
, int len
)
9964 if (remote_hw_watchpoint_length_limit
== 0)
9966 else if (remote_hw_watchpoint_length_limit
< 0)
9968 else if (len
<= remote_hw_watchpoint_length_limit
)
9975 remote_check_watch_resources (struct target_ops
*self
,
9976 enum bptype type
, int cnt
, int ot
)
9978 if (type
== bp_hardware_breakpoint
)
9980 if (remote_hw_breakpoint_limit
== 0)
9982 else if (remote_hw_breakpoint_limit
< 0)
9984 else if (cnt
<= remote_hw_breakpoint_limit
)
9989 if (remote_hw_watchpoint_limit
== 0)
9991 else if (remote_hw_watchpoint_limit
< 0)
9995 else if (cnt
<= remote_hw_watchpoint_limit
)
10001 /* The to_stopped_by_sw_breakpoint method of target remote. */
10004 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10006 struct thread_info
*thread
= inferior_thread ();
10008 return (thread
->priv
!= NULL
10009 && (get_remote_thread_info (thread
)->stop_reason
10010 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10013 /* The to_supports_stopped_by_sw_breakpoint method of target
10017 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
10019 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10022 /* The to_stopped_by_hw_breakpoint method of target remote. */
10025 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10027 struct thread_info
*thread
= inferior_thread ();
10029 return (thread
->priv
!= NULL
10030 && (get_remote_thread_info (thread
)->stop_reason
10031 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10034 /* The to_supports_stopped_by_hw_breakpoint method of target
10038 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
10040 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10044 remote_stopped_by_watchpoint (struct target_ops
*ops
)
10046 struct thread_info
*thread
= inferior_thread ();
10048 return (thread
->priv
!= NULL
10049 && (get_remote_thread_info (thread
)->stop_reason
10050 == TARGET_STOPPED_BY_WATCHPOINT
));
10054 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
10056 struct thread_info
*thread
= inferior_thread ();
10058 if (thread
->priv
!= NULL
10059 && (get_remote_thread_info (thread
)->stop_reason
10060 == TARGET_STOPPED_BY_WATCHPOINT
))
10062 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10071 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10072 struct bp_target_info
*bp_tgt
)
10074 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10075 struct remote_state
*rs
;
10079 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10082 /* Make sure the remote is pointing at the right process, if
10084 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10085 set_general_process ();
10087 rs
= get_remote_state ();
10089 endbuf
= rs
->buf
+ get_remote_packet_size ();
10095 addr
= remote_address_masked (addr
);
10096 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10097 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10099 if (remote_supports_cond_breakpoints (self
))
10100 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10102 if (remote_can_run_breakpoint_commands (self
))
10103 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10106 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10108 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10111 if (rs
->buf
[1] == '.')
10113 message
= strchr (rs
->buf
+ 2, '.');
10115 error (_("Remote failure reply: %s"), message
+ 1);
10118 case PACKET_UNKNOWN
:
10123 internal_error (__FILE__
, __LINE__
,
10124 _("remote_insert_hw_breakpoint: reached end of function"));
10129 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10130 struct bp_target_info
*bp_tgt
)
10133 struct remote_state
*rs
= get_remote_state ();
10135 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10137 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10140 /* Make sure the remote is pointing at the right process, if
10142 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10143 set_general_process ();
10149 addr
= remote_address_masked (bp_tgt
->placed_address
);
10150 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10151 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10154 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10156 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10159 case PACKET_UNKNOWN
:
10164 internal_error (__FILE__
, __LINE__
,
10165 _("remote_remove_hw_breakpoint: reached end of function"));
10168 /* Verify memory using the "qCRC:" request. */
10171 remote_verify_memory (struct target_ops
*ops
,
10172 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10174 struct remote_state
*rs
= get_remote_state ();
10175 unsigned long host_crc
, target_crc
;
10178 /* It doesn't make sense to use qCRC if the remote target is
10179 connected but not running. */
10180 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10182 enum packet_result result
;
10184 /* Make sure the remote is pointing at the right process. */
10185 set_general_process ();
10187 /* FIXME: assumes lma can fit into long. */
10188 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10189 (long) lma
, (long) size
);
10192 /* Be clever; compute the host_crc before waiting for target
10194 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10196 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10198 result
= packet_ok (rs
->buf
,
10199 &remote_protocol_packets
[PACKET_qCRC
]);
10200 if (result
== PACKET_ERROR
)
10202 else if (result
== PACKET_OK
)
10204 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10205 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10207 return (host_crc
== target_crc
);
10211 return simple_verify_memory (ops
, data
, lma
, size
);
10214 /* compare-sections command
10216 With no arguments, compares each loadable section in the exec bfd
10217 with the same memory range on the target, and reports mismatches.
10218 Useful for verifying the image on the target against the exec file. */
10221 compare_sections_command (const char *args
, int from_tty
)
10224 const char *sectname
;
10225 bfd_size_type size
;
10228 int mismatched
= 0;
10233 error (_("command cannot be used without an exec file"));
10235 /* Make sure the remote is pointing at the right process. */
10236 set_general_process ();
10238 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10244 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10246 if (!(s
->flags
& SEC_LOAD
))
10247 continue; /* Skip non-loadable section. */
10249 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10250 continue; /* Skip writeable sections */
10252 size
= bfd_get_section_size (s
);
10254 continue; /* Skip zero-length section. */
10256 sectname
= bfd_get_section_name (exec_bfd
, s
);
10257 if (args
&& strcmp (args
, sectname
) != 0)
10258 continue; /* Not the section selected by user. */
10260 matched
= 1; /* Do this section. */
10263 gdb::byte_vector
sectdata (size
);
10264 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10266 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10269 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10270 paddress (target_gdbarch (), lma
),
10271 paddress (target_gdbarch (), lma
+ size
));
10273 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10274 paddress (target_gdbarch (), lma
),
10275 paddress (target_gdbarch (), lma
+ size
));
10277 printf_filtered ("matched.\n");
10280 printf_filtered ("MIS-MATCHED!\n");
10284 if (mismatched
> 0)
10285 warning (_("One or more sections of the target image does not match\n\
10286 the loaded file\n"));
10287 if (args
&& !matched
)
10288 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10291 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10292 into remote target. The number of bytes written to the remote
10293 target is returned, or -1 for error. */
10295 static enum target_xfer_status
10296 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
10297 const char *annex
, const gdb_byte
*writebuf
,
10298 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
10299 struct packet_config
*packet
)
10303 struct remote_state
*rs
= get_remote_state ();
10304 int max_size
= get_memory_write_packet_size ();
10306 if (packet_config_support (packet
) == PACKET_DISABLE
)
10307 return TARGET_XFER_E_IO
;
10309 /* Insert header. */
10310 i
= snprintf (rs
->buf
, max_size
,
10311 "qXfer:%s:write:%s:%s:",
10312 object_name
, annex
? annex
: "",
10313 phex_nz (offset
, sizeof offset
));
10314 max_size
-= (i
+ 1);
10316 /* Escape as much data as fits into rs->buf. */
10317 buf_len
= remote_escape_output
10318 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10320 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10321 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10322 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10323 return TARGET_XFER_E_IO
;
10325 unpack_varlen_hex (rs
->buf
, &n
);
10328 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10331 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10332 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10333 number of bytes read is returned, or 0 for EOF, or -1 for error.
10334 The number of bytes read may be less than LEN without indicating an
10335 EOF. PACKET is checked and updated to indicate whether the remote
10336 target supports this object. */
10338 static enum target_xfer_status
10339 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
10341 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
10342 ULONGEST
*xfered_len
,
10343 struct packet_config
*packet
)
10345 struct remote_state
*rs
= get_remote_state ();
10346 LONGEST i
, n
, packet_len
;
10348 if (packet_config_support (packet
) == PACKET_DISABLE
)
10349 return TARGET_XFER_E_IO
;
10351 /* Check whether we've cached an end-of-object packet that matches
10353 if (rs
->finished_object
)
10355 if (strcmp (object_name
, rs
->finished_object
) == 0
10356 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10357 && offset
== rs
->finished_offset
)
10358 return TARGET_XFER_EOF
;
10361 /* Otherwise, we're now reading something different. Discard
10363 xfree (rs
->finished_object
);
10364 xfree (rs
->finished_annex
);
10365 rs
->finished_object
= NULL
;
10366 rs
->finished_annex
= NULL
;
10369 /* Request only enough to fit in a single packet. The actual data
10370 may not, since we don't know how much of it will need to be escaped;
10371 the target is free to respond with slightly less data. We subtract
10372 five to account for the response type and the protocol frame. */
10373 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10374 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10375 object_name
, annex
? annex
: "",
10376 phex_nz (offset
, sizeof offset
),
10377 phex_nz (n
, sizeof n
));
10378 i
= putpkt (rs
->buf
);
10380 return TARGET_XFER_E_IO
;
10383 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10384 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10385 return TARGET_XFER_E_IO
;
10387 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10388 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10390 /* 'm' means there is (or at least might be) more data after this
10391 batch. That does not make sense unless there's at least one byte
10392 of data in this reply. */
10393 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10394 error (_("Remote qXfer reply contained no data."));
10396 /* Got some data. */
10397 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10398 packet_len
- 1, readbuf
, n
);
10400 /* 'l' is an EOF marker, possibly including a final block of data,
10401 or possibly empty. If we have the final block of a non-empty
10402 object, record this fact to bypass a subsequent partial read. */
10403 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10405 rs
->finished_object
= xstrdup (object_name
);
10406 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10407 rs
->finished_offset
= offset
+ i
;
10411 return TARGET_XFER_EOF
;
10415 return TARGET_XFER_OK
;
10419 static enum target_xfer_status
10420 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
10421 const char *annex
, gdb_byte
*readbuf
,
10422 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10423 ULONGEST
*xfered_len
)
10425 struct remote_state
*rs
;
10429 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10431 set_remote_traceframe ();
10432 set_general_thread (inferior_ptid
);
10434 rs
= get_remote_state ();
10436 /* Handle memory using the standard memory routines. */
10437 if (object
== TARGET_OBJECT_MEMORY
)
10439 /* If the remote target is connected but not running, we should
10440 pass this request down to a lower stratum (e.g. the executable
10442 if (!target_has_execution
)
10443 return TARGET_XFER_EOF
;
10445 if (writebuf
!= NULL
)
10446 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10449 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10453 /* Handle SPU memory using qxfer packets. */
10454 if (object
== TARGET_OBJECT_SPU
)
10457 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10458 xfered_len
, &remote_protocol_packets
10459 [PACKET_qXfer_spu_read
]);
10461 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10462 xfered_len
, &remote_protocol_packets
10463 [PACKET_qXfer_spu_write
]);
10466 /* Handle extra signal info using qxfer packets. */
10467 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10470 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10471 xfered_len
, &remote_protocol_packets
10472 [PACKET_qXfer_siginfo_read
]);
10474 return remote_write_qxfer (ops
, "siginfo", annex
,
10475 writebuf
, offset
, len
, xfered_len
,
10476 &remote_protocol_packets
10477 [PACKET_qXfer_siginfo_write
]);
10480 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10483 return remote_read_qxfer (ops
, "statictrace", annex
,
10484 readbuf
, offset
, len
, xfered_len
,
10485 &remote_protocol_packets
10486 [PACKET_qXfer_statictrace_read
]);
10488 return TARGET_XFER_E_IO
;
10491 /* Only handle flash writes. */
10492 if (writebuf
!= NULL
)
10496 case TARGET_OBJECT_FLASH
:
10497 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10501 return TARGET_XFER_E_IO
;
10505 /* Map pre-existing objects onto letters. DO NOT do this for new
10506 objects!!! Instead specify new query packets. */
10509 case TARGET_OBJECT_AVR
:
10513 case TARGET_OBJECT_AUXV
:
10514 gdb_assert (annex
== NULL
);
10515 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10517 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10519 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10520 return remote_read_qxfer
10521 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10522 &remote_protocol_packets
[PACKET_qXfer_features
]);
10524 case TARGET_OBJECT_LIBRARIES
:
10525 return remote_read_qxfer
10526 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10527 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10529 case TARGET_OBJECT_LIBRARIES_SVR4
:
10530 return remote_read_qxfer
10531 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10532 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10534 case TARGET_OBJECT_MEMORY_MAP
:
10535 gdb_assert (annex
== NULL
);
10536 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10538 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10540 case TARGET_OBJECT_OSDATA
:
10541 /* Should only get here if we're connected. */
10542 gdb_assert (rs
->remote_desc
);
10543 return remote_read_qxfer
10544 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10545 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10547 case TARGET_OBJECT_THREADS
:
10548 gdb_assert (annex
== NULL
);
10549 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10551 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10553 case TARGET_OBJECT_TRACEFRAME_INFO
:
10554 gdb_assert (annex
== NULL
);
10555 return remote_read_qxfer
10556 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10557 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10559 case TARGET_OBJECT_FDPIC
:
10560 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10562 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10564 case TARGET_OBJECT_OPENVMS_UIB
:
10565 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10567 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10569 case TARGET_OBJECT_BTRACE
:
10570 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10572 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10574 case TARGET_OBJECT_BTRACE_CONF
:
10575 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10577 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10579 case TARGET_OBJECT_EXEC_FILE
:
10580 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10582 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10585 return TARGET_XFER_E_IO
;
10588 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10589 large enough let the caller deal with it. */
10590 if (len
< get_remote_packet_size ())
10591 return TARGET_XFER_E_IO
;
10592 len
= get_remote_packet_size ();
10594 /* Except for querying the minimum buffer size, target must be open. */
10595 if (!rs
->remote_desc
)
10596 error (_("remote query is only available after target open"));
10598 gdb_assert (annex
!= NULL
);
10599 gdb_assert (readbuf
!= NULL
);
10603 *p2
++ = query_type
;
10605 /* We used one buffer char for the remote protocol q command and
10606 another for the query type. As the remote protocol encapsulation
10607 uses 4 chars plus one extra in case we are debugging
10608 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10611 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10613 /* Bad caller may have sent forbidden characters. */
10614 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10619 gdb_assert (annex
[i
] == '\0');
10621 i
= putpkt (rs
->buf
);
10623 return TARGET_XFER_E_IO
;
10625 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10626 strcpy ((char *) readbuf
, rs
->buf
);
10628 *xfered_len
= strlen ((char *) readbuf
);
10629 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10632 /* Implementation of to_get_memory_xfer_limit. */
10635 remote_get_memory_xfer_limit (struct target_ops
*ops
)
10637 return get_memory_write_packet_size ();
10641 remote_search_memory (struct target_ops
* ops
,
10642 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10643 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10644 CORE_ADDR
*found_addrp
)
10646 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10647 struct remote_state
*rs
= get_remote_state ();
10648 int max_size
= get_memory_write_packet_size ();
10649 struct packet_config
*packet
=
10650 &remote_protocol_packets
[PACKET_qSearch_memory
];
10651 /* Number of packet bytes used to encode the pattern;
10652 this could be more than PATTERN_LEN due to escape characters. */
10653 int escaped_pattern_len
;
10654 /* Amount of pattern that was encodable in the packet. */
10655 int used_pattern_len
;
10658 ULONGEST found_addr
;
10660 /* Don't go to the target if we don't have to. This is done before
10661 checking packet_config_support to avoid the possibility that a
10662 success for this edge case means the facility works in
10664 if (pattern_len
> search_space_len
)
10666 if (pattern_len
== 0)
10668 *found_addrp
= start_addr
;
10672 /* If we already know the packet isn't supported, fall back to the simple
10673 way of searching memory. */
10675 if (packet_config_support (packet
) == PACKET_DISABLE
)
10677 /* Target doesn't provided special support, fall back and use the
10678 standard support (copy memory and do the search here). */
10679 return simple_search_memory (ops
, start_addr
, search_space_len
,
10680 pattern
, pattern_len
, found_addrp
);
10683 /* Make sure the remote is pointing at the right process. */
10684 set_general_process ();
10686 /* Insert header. */
10687 i
= snprintf (rs
->buf
, max_size
,
10688 "qSearch:memory:%s;%s;",
10689 phex_nz (start_addr
, addr_size
),
10690 phex_nz (search_space_len
, sizeof (search_space_len
)));
10691 max_size
-= (i
+ 1);
10693 /* Escape as much data as fits into rs->buf. */
10694 escaped_pattern_len
=
10695 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10696 &used_pattern_len
, max_size
);
10698 /* Bail if the pattern is too large. */
10699 if (used_pattern_len
!= pattern_len
)
10700 error (_("Pattern is too large to transmit to remote target."));
10702 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10703 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10704 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10706 /* The request may not have worked because the command is not
10707 supported. If so, fall back to the simple way. */
10708 if (packet_config_support (packet
) == PACKET_DISABLE
)
10710 return simple_search_memory (ops
, start_addr
, search_space_len
,
10711 pattern
, pattern_len
, found_addrp
);
10716 if (rs
->buf
[0] == '0')
10718 else if (rs
->buf
[0] == '1')
10721 if (rs
->buf
[1] != ',')
10722 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10723 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10724 *found_addrp
= found_addr
;
10727 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10733 remote_rcmd (struct target_ops
*self
, const char *command
,
10734 struct ui_file
*outbuf
)
10736 struct remote_state
*rs
= get_remote_state ();
10739 if (!rs
->remote_desc
)
10740 error (_("remote rcmd is only available after target open"));
10742 /* Send a NULL command across as an empty command. */
10743 if (command
== NULL
)
10746 /* The query prefix. */
10747 strcpy (rs
->buf
, "qRcmd,");
10748 p
= strchr (rs
->buf
, '\0');
10750 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10751 > get_remote_packet_size ())
10752 error (_("\"monitor\" command ``%s'' is too long."), command
);
10754 /* Encode the actual command. */
10755 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10757 if (putpkt (rs
->buf
) < 0)
10758 error (_("Communication problem with target."));
10760 /* get/display the response */
10765 /* XXX - see also remote_get_noisy_reply(). */
10766 QUIT
; /* Allow user to bail out with ^C. */
10768 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10770 /* Timeout. Continue to (try to) read responses.
10771 This is better than stopping with an error, assuming the stub
10772 is still executing the (long) monitor command.
10773 If needed, the user can interrupt gdb using C-c, obtaining
10774 an effect similar to stop on timeout. */
10778 if (buf
[0] == '\0')
10779 error (_("Target does not support this command."));
10780 if (buf
[0] == 'O' && buf
[1] != 'K')
10782 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10785 if (strcmp (buf
, "OK") == 0)
10787 if (strlen (buf
) == 3 && buf
[0] == 'E'
10788 && isdigit (buf
[1]) && isdigit (buf
[2]))
10790 error (_("Protocol error with Rcmd"));
10792 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10794 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10796 fputc_unfiltered (c
, outbuf
);
10802 static std::vector
<mem_region
>
10803 remote_memory_map (struct target_ops
*ops
)
10805 std::vector
<mem_region
> result
;
10806 gdb::unique_xmalloc_ptr
<char> text
10807 = target_read_stralloc (¤t_target
, TARGET_OBJECT_MEMORY_MAP
, NULL
);
10810 result
= parse_memory_map (text
.get ());
10816 packet_command (const char *args
, int from_tty
)
10818 struct remote_state
*rs
= get_remote_state ();
10820 if (!rs
->remote_desc
)
10821 error (_("command can only be used with remote target"));
10824 error (_("remote-packet command requires packet text as argument"));
10826 puts_filtered ("sending: ");
10827 print_packet (args
);
10828 puts_filtered ("\n");
10831 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10832 puts_filtered ("received: ");
10833 print_packet (rs
->buf
);
10834 puts_filtered ("\n");
10838 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10840 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10842 static void threadset_test_cmd (char *cmd
, int tty
);
10844 static void threadalive_test (char *cmd
, int tty
);
10846 static void threadlist_test_cmd (char *cmd
, int tty
);
10848 int get_and_display_threadinfo (threadref
*ref
);
10850 static void threadinfo_test_cmd (char *cmd
, int tty
);
10852 static int thread_display_step (threadref
*ref
, void *context
);
10854 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10856 static void init_remote_threadtests (void);
10858 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10861 threadset_test_cmd (const char *cmd
, int tty
)
10863 int sample_thread
= SAMPLE_THREAD
;
10865 printf_filtered (_("Remote threadset test\n"));
10866 set_general_thread (sample_thread
);
10871 threadalive_test (const char *cmd
, int tty
)
10873 int sample_thread
= SAMPLE_THREAD
;
10874 int pid
= ptid_get_pid (inferior_ptid
);
10875 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10877 if (remote_thread_alive (ptid
))
10878 printf_filtered ("PASS: Thread alive test\n");
10880 printf_filtered ("FAIL: Thread alive test\n");
10883 void output_threadid (char *title
, threadref
*ref
);
10886 output_threadid (char *title
, threadref
*ref
)
10890 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10892 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10896 threadlist_test_cmd (const char *cmd
, int tty
)
10899 threadref nextthread
;
10900 int done
, result_count
;
10901 threadref threadlist
[3];
10903 printf_filtered ("Remote Threadlist test\n");
10904 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10905 &result_count
, &threadlist
[0]))
10906 printf_filtered ("FAIL: threadlist test\n");
10909 threadref
*scan
= threadlist
;
10910 threadref
*limit
= scan
+ result_count
;
10912 while (scan
< limit
)
10913 output_threadid (" thread ", scan
++);
10918 display_thread_info (struct gdb_ext_thread_info
*info
)
10920 output_threadid ("Threadid: ", &info
->threadid
);
10921 printf_filtered ("Name: %s\n ", info
->shortname
);
10922 printf_filtered ("State: %s\n", info
->display
);
10923 printf_filtered ("other: %s\n\n", info
->more_display
);
10927 get_and_display_threadinfo (threadref
*ref
)
10931 struct gdb_ext_thread_info threadinfo
;
10933 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
10934 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
10935 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
10936 display_thread_info (&threadinfo
);
10941 threadinfo_test_cmd (const char *cmd
, int tty
)
10943 int athread
= SAMPLE_THREAD
;
10947 int_to_threadref (&thread
, athread
);
10948 printf_filtered ("Remote Threadinfo test\n");
10949 if (!get_and_display_threadinfo (&thread
))
10950 printf_filtered ("FAIL cannot get thread info\n");
10954 thread_display_step (threadref
*ref
, void *context
)
10956 /* output_threadid(" threadstep ",ref); *//* simple test */
10957 return get_and_display_threadinfo (ref
);
10961 threadlist_update_test_cmd (const char *cmd
, int tty
)
10963 printf_filtered ("Remote Threadlist update test\n");
10964 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
10968 init_remote_threadtests (void)
10970 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
10971 _("Fetch and print the remote list of "
10972 "thread identifiers, one pkt only"));
10973 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
10974 _("Fetch and display info about one thread"));
10975 add_com ("tset", class_obscure
, threadset_test_cmd
,
10976 _("Test setting to a different thread"));
10977 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
10978 _("Iterate through updating all remote thread info"));
10979 add_com ("talive", class_obscure
, threadalive_test
,
10980 _(" Remote thread alive test "));
10985 /* Convert a thread ID to a string. Returns the string in a static
10988 static const char *
10989 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
10991 static char buf
[64];
10992 struct remote_state
*rs
= get_remote_state ();
10994 if (ptid_equal (ptid
, null_ptid
))
10995 return normal_pid_to_str (ptid
);
10996 else if (ptid_is_pid (ptid
))
10998 /* Printing an inferior target id. */
11000 /* When multi-process extensions are off, there's no way in the
11001 remote protocol to know the remote process id, if there's any
11002 at all. There's one exception --- when we're connected with
11003 target extended-remote, and we manually attached to a process
11004 with "attach PID". We don't record anywhere a flag that
11005 allows us to distinguish that case from the case of
11006 connecting with extended-remote and the stub already being
11007 attached to a process, and reporting yes to qAttached, hence
11008 no smart special casing here. */
11009 if (!remote_multi_process_p (rs
))
11011 xsnprintf (buf
, sizeof buf
, "Remote target");
11015 return normal_pid_to_str (ptid
);
11019 if (ptid_equal (magic_null_ptid
, ptid
))
11020 xsnprintf (buf
, sizeof buf
, "Thread <main>");
11021 else if (remote_multi_process_p (rs
))
11022 if (ptid_get_lwp (ptid
) == 0)
11023 return normal_pid_to_str (ptid
);
11025 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
11026 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
11028 xsnprintf (buf
, sizeof buf
, "Thread %ld",
11029 ptid_get_lwp (ptid
));
11034 /* Get the address of the thread local variable in OBJFILE which is
11035 stored at OFFSET within the thread local storage for thread PTID. */
11038 remote_get_thread_local_address (struct target_ops
*ops
,
11039 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
11041 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11043 struct remote_state
*rs
= get_remote_state ();
11045 char *endp
= rs
->buf
+ get_remote_packet_size ();
11046 enum packet_result result
;
11048 strcpy (p
, "qGetTLSAddr:");
11050 p
= write_ptid (p
, endp
, ptid
);
11052 p
+= hexnumstr (p
, offset
);
11054 p
+= hexnumstr (p
, lm
);
11058 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11059 result
= packet_ok (rs
->buf
,
11060 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11061 if (result
== PACKET_OK
)
11065 unpack_varlen_hex (rs
->buf
, &result
);
11068 else if (result
== PACKET_UNKNOWN
)
11069 throw_error (TLS_GENERIC_ERROR
,
11070 _("Remote target doesn't support qGetTLSAddr packet"));
11072 throw_error (TLS_GENERIC_ERROR
,
11073 _("Remote target failed to process qGetTLSAddr request"));
11076 throw_error (TLS_GENERIC_ERROR
,
11077 _("TLS not supported or disabled on this target"));
11082 /* Provide thread local base, i.e. Thread Information Block address.
11083 Returns 1 if ptid is found and thread_local_base is non zero. */
11086 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
11088 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11090 struct remote_state
*rs
= get_remote_state ();
11092 char *endp
= rs
->buf
+ get_remote_packet_size ();
11093 enum packet_result result
;
11095 strcpy (p
, "qGetTIBAddr:");
11097 p
= write_ptid (p
, endp
, ptid
);
11101 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11102 result
= packet_ok (rs
->buf
,
11103 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11104 if (result
== PACKET_OK
)
11108 unpack_varlen_hex (rs
->buf
, &result
);
11110 *addr
= (CORE_ADDR
) result
;
11113 else if (result
== PACKET_UNKNOWN
)
11114 error (_("Remote target doesn't support qGetTIBAddr packet"));
11116 error (_("Remote target failed to process qGetTIBAddr request"));
11119 error (_("qGetTIBAddr not supported or disabled on this target"));
11124 /* Support for inferring a target description based on the current
11125 architecture and the size of a 'g' packet. While the 'g' packet
11126 can have any size (since optional registers can be left off the
11127 end), some sizes are easily recognizable given knowledge of the
11128 approximate architecture. */
11130 struct remote_g_packet_guess
11133 const struct target_desc
*tdesc
;
11135 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
11136 DEF_VEC_O(remote_g_packet_guess_s
);
11138 struct remote_g_packet_data
11140 VEC(remote_g_packet_guess_s
) *guesses
;
11143 static struct gdbarch_data
*remote_g_packet_data_handle
;
11146 remote_g_packet_data_init (struct obstack
*obstack
)
11148 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
11152 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11153 const struct target_desc
*tdesc
)
11155 struct remote_g_packet_data
*data
11156 = ((struct remote_g_packet_data
*)
11157 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11158 struct remote_g_packet_guess new_guess
, *guess
;
11161 gdb_assert (tdesc
!= NULL
);
11164 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11166 if (guess
->bytes
== bytes
)
11167 internal_error (__FILE__
, __LINE__
,
11168 _("Duplicate g packet description added for size %d"),
11171 new_guess
.bytes
= bytes
;
11172 new_guess
.tdesc
= tdesc
;
11173 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
11176 /* Return 1 if remote_read_description would do anything on this target
11177 and architecture, 0 otherwise. */
11180 remote_read_description_p (struct target_ops
*target
)
11182 struct remote_g_packet_data
*data
11183 = ((struct remote_g_packet_data
*)
11184 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11186 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11192 static const struct target_desc
*
11193 remote_read_description (struct target_ops
*target
)
11195 struct remote_g_packet_data
*data
11196 = ((struct remote_g_packet_data
*)
11197 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11199 /* Do not try this during initial connection, when we do not know
11200 whether there is a running but stopped thread. */
11201 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
11202 return target
->beneath
->to_read_description (target
->beneath
);
11204 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11206 struct remote_g_packet_guess
*guess
;
11208 int bytes
= send_g_packet ();
11211 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11213 if (guess
->bytes
== bytes
)
11214 return guess
->tdesc
;
11216 /* We discard the g packet. A minor optimization would be to
11217 hold on to it, and fill the register cache once we have selected
11218 an architecture, but it's too tricky to do safely. */
11221 return target
->beneath
->to_read_description (target
->beneath
);
11224 /* Remote file transfer support. This is host-initiated I/O, not
11225 target-initiated; for target-initiated, see remote-fileio.c. */
11227 /* If *LEFT is at least the length of STRING, copy STRING to
11228 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11229 decrease *LEFT. Otherwise raise an error. */
11232 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11234 int len
= strlen (string
);
11237 error (_("Packet too long for target."));
11239 memcpy (*buffer
, string
, len
);
11243 /* NUL-terminate the buffer as a convenience, if there is
11249 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11250 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11251 decrease *LEFT. Otherwise raise an error. */
11254 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11257 if (2 * len
> *left
)
11258 error (_("Packet too long for target."));
11260 bin2hex (bytes
, *buffer
, len
);
11261 *buffer
+= 2 * len
;
11264 /* NUL-terminate the buffer as a convenience, if there is
11270 /* If *LEFT is large enough, convert VALUE to hex and add it to
11271 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11272 decrease *LEFT. Otherwise raise an error. */
11275 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11277 int len
= hexnumlen (value
);
11280 error (_("Packet too long for target."));
11282 hexnumstr (*buffer
, value
);
11286 /* NUL-terminate the buffer as a convenience, if there is
11292 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11293 value, *REMOTE_ERRNO to the remote error number or zero if none
11294 was included, and *ATTACHMENT to point to the start of the annex
11295 if any. The length of the packet isn't needed here; there may
11296 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11298 Return 0 if the packet could be parsed, -1 if it could not. If
11299 -1 is returned, the other variables may not be initialized. */
11302 remote_hostio_parse_result (char *buffer
, int *retcode
,
11303 int *remote_errno
, char **attachment
)
11308 *attachment
= NULL
;
11310 if (buffer
[0] != 'F')
11314 *retcode
= strtol (&buffer
[1], &p
, 16);
11315 if (errno
!= 0 || p
== &buffer
[1])
11318 /* Check for ",errno". */
11322 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11323 if (errno
!= 0 || p
+ 1 == p2
)
11328 /* Check for ";attachment". If there is no attachment, the
11329 packet should end here. */
11332 *attachment
= p
+ 1;
11335 else if (*p
== '\0')
11341 /* Send a prepared I/O packet to the target and read its response.
11342 The prepared packet is in the global RS->BUF before this function
11343 is called, and the answer is there when we return.
11345 COMMAND_BYTES is the length of the request to send, which may include
11346 binary data. WHICH_PACKET is the packet configuration to check
11347 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11348 is set to the error number and -1 is returned. Otherwise the value
11349 returned by the function is returned.
11351 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11352 attachment is expected; an error will be reported if there's a
11353 mismatch. If one is found, *ATTACHMENT will be set to point into
11354 the packet buffer and *ATTACHMENT_LEN will be set to the
11355 attachment's length. */
11358 remote_hostio_send_command (int command_bytes
, int which_packet
,
11359 int *remote_errno
, char **attachment
,
11360 int *attachment_len
)
11362 struct remote_state
*rs
= get_remote_state ();
11363 int ret
, bytes_read
;
11364 char *attachment_tmp
;
11366 if (!rs
->remote_desc
11367 || packet_support (which_packet
) == PACKET_DISABLE
)
11369 *remote_errno
= FILEIO_ENOSYS
;
11373 putpkt_binary (rs
->buf
, command_bytes
);
11374 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11376 /* If it timed out, something is wrong. Don't try to parse the
11378 if (bytes_read
< 0)
11380 *remote_errno
= FILEIO_EINVAL
;
11384 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11387 *remote_errno
= FILEIO_EINVAL
;
11389 case PACKET_UNKNOWN
:
11390 *remote_errno
= FILEIO_ENOSYS
;
11396 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11399 *remote_errno
= FILEIO_EINVAL
;
11403 /* Make sure we saw an attachment if and only if we expected one. */
11404 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11405 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11407 *remote_errno
= FILEIO_EINVAL
;
11411 /* If an attachment was found, it must point into the packet buffer;
11412 work out how many bytes there were. */
11413 if (attachment_tmp
!= NULL
)
11415 *attachment
= attachment_tmp
;
11416 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11422 /* Invalidate the readahead cache. */
11425 readahead_cache_invalidate (void)
11427 struct remote_state
*rs
= get_remote_state ();
11429 rs
->readahead_cache
.fd
= -1;
11432 /* Invalidate the readahead cache if it is holding data for FD. */
11435 readahead_cache_invalidate_fd (int fd
)
11437 struct remote_state
*rs
= get_remote_state ();
11439 if (rs
->readahead_cache
.fd
== fd
)
11440 rs
->readahead_cache
.fd
= -1;
11443 /* Set the filesystem remote_hostio functions that take FILENAME
11444 arguments will use. Return 0 on success, or -1 if an error
11445 occurs (and set *REMOTE_ERRNO). */
11448 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11450 struct remote_state
*rs
= get_remote_state ();
11451 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11453 int left
= get_remote_packet_size () - 1;
11457 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11460 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11463 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11465 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11466 remote_buffer_add_string (&p
, &left
, arg
);
11468 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11469 remote_errno
, NULL
, NULL
);
11471 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11475 rs
->fs_pid
= required_pid
;
11480 /* Implementation of to_fileio_open. */
11483 remote_hostio_open (struct target_ops
*self
,
11484 struct inferior
*inf
, const char *filename
,
11485 int flags
, int mode
, int warn_if_slow
,
11488 struct remote_state
*rs
= get_remote_state ();
11490 int left
= get_remote_packet_size () - 1;
11494 static int warning_issued
= 0;
11496 printf_unfiltered (_("Reading %s from remote target...\n"),
11499 if (!warning_issued
)
11501 warning (_("File transfers from remote targets can be slow."
11502 " Use \"set sysroot\" to access files locally"
11504 warning_issued
= 1;
11508 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11511 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11513 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11514 strlen (filename
));
11515 remote_buffer_add_string (&p
, &left
, ",");
11517 remote_buffer_add_int (&p
, &left
, flags
);
11518 remote_buffer_add_string (&p
, &left
, ",");
11520 remote_buffer_add_int (&p
, &left
, mode
);
11522 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11523 remote_errno
, NULL
, NULL
);
11526 /* Implementation of to_fileio_pwrite. */
11529 remote_hostio_pwrite (struct target_ops
*self
,
11530 int fd
, const gdb_byte
*write_buf
, int len
,
11531 ULONGEST offset
, int *remote_errno
)
11533 struct remote_state
*rs
= get_remote_state ();
11535 int left
= get_remote_packet_size ();
11538 readahead_cache_invalidate_fd (fd
);
11540 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11542 remote_buffer_add_int (&p
, &left
, fd
);
11543 remote_buffer_add_string (&p
, &left
, ",");
11545 remote_buffer_add_int (&p
, &left
, offset
);
11546 remote_buffer_add_string (&p
, &left
, ",");
11548 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11549 get_remote_packet_size () - (p
- rs
->buf
));
11551 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11552 remote_errno
, NULL
, NULL
);
11555 /* Helper for the implementation of to_fileio_pread. Read the file
11556 from the remote side with vFile:pread. */
11559 remote_hostio_pread_vFile (struct target_ops
*self
,
11560 int fd
, gdb_byte
*read_buf
, int len
,
11561 ULONGEST offset
, int *remote_errno
)
11563 struct remote_state
*rs
= get_remote_state ();
11566 int left
= get_remote_packet_size ();
11567 int ret
, attachment_len
;
11570 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11572 remote_buffer_add_int (&p
, &left
, fd
);
11573 remote_buffer_add_string (&p
, &left
, ",");
11575 remote_buffer_add_int (&p
, &left
, len
);
11576 remote_buffer_add_string (&p
, &left
, ",");
11578 remote_buffer_add_int (&p
, &left
, offset
);
11580 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11581 remote_errno
, &attachment
,
11587 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11589 if (read_len
!= ret
)
11590 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11595 /* Serve pread from the readahead cache. Returns number of bytes
11596 read, or 0 if the request can't be served from the cache. */
11599 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11600 int fd
, gdb_byte
*read_buf
, size_t len
,
11603 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11605 if (cache
->fd
== fd
11606 && cache
->offset
<= offset
11607 && offset
< cache
->offset
+ cache
->bufsize
)
11609 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11611 if (offset
+ len
> max
)
11612 len
= max
- offset
;
11614 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11621 /* Implementation of to_fileio_pread. */
11624 remote_hostio_pread (struct target_ops
*self
,
11625 int fd
, gdb_byte
*read_buf
, int len
,
11626 ULONGEST offset
, int *remote_errno
)
11629 struct remote_state
*rs
= get_remote_state ();
11630 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11632 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11635 cache
->hit_count
++;
11638 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11639 pulongest (cache
->hit_count
));
11643 cache
->miss_count
++;
11645 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11646 pulongest (cache
->miss_count
));
11649 cache
->offset
= offset
;
11650 cache
->bufsize
= get_remote_packet_size ();
11651 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11653 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11654 cache
->offset
, remote_errno
);
11657 readahead_cache_invalidate_fd (fd
);
11661 cache
->bufsize
= ret
;
11662 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11665 /* Implementation of to_fileio_close. */
11668 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11670 struct remote_state
*rs
= get_remote_state ();
11672 int left
= get_remote_packet_size () - 1;
11674 readahead_cache_invalidate_fd (fd
);
11676 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11678 remote_buffer_add_int (&p
, &left
, fd
);
11680 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11681 remote_errno
, NULL
, NULL
);
11684 /* Implementation of to_fileio_unlink. */
11687 remote_hostio_unlink (struct target_ops
*self
,
11688 struct inferior
*inf
, const char *filename
,
11691 struct remote_state
*rs
= get_remote_state ();
11693 int left
= get_remote_packet_size () - 1;
11695 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11698 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11700 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11701 strlen (filename
));
11703 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11704 remote_errno
, NULL
, NULL
);
11707 /* Implementation of to_fileio_readlink. */
11710 remote_hostio_readlink (struct target_ops
*self
,
11711 struct inferior
*inf
, const char *filename
,
11714 struct remote_state
*rs
= get_remote_state ();
11717 int left
= get_remote_packet_size ();
11718 int len
, attachment_len
;
11722 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11725 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11727 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11728 strlen (filename
));
11730 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11731 remote_errno
, &attachment
,
11737 ret
= (char *) xmalloc (len
+ 1);
11739 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11740 (gdb_byte
*) ret
, len
);
11741 if (read_len
!= len
)
11742 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11748 /* Implementation of to_fileio_fstat. */
11751 remote_hostio_fstat (struct target_ops
*self
,
11752 int fd
, struct stat
*st
,
11755 struct remote_state
*rs
= get_remote_state ();
11757 int left
= get_remote_packet_size ();
11758 int attachment_len
, ret
;
11760 struct fio_stat fst
;
11763 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11765 remote_buffer_add_int (&p
, &left
, fd
);
11767 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11768 remote_errno
, &attachment
,
11772 if (*remote_errno
!= FILEIO_ENOSYS
)
11775 /* Strictly we should return -1, ENOSYS here, but when
11776 "set sysroot remote:" was implemented in August 2008
11777 BFD's need for a stat function was sidestepped with
11778 this hack. This was not remedied until March 2015
11779 so we retain the previous behavior to avoid breaking
11782 Note that the memset is a March 2015 addition; older
11783 GDBs set st_size *and nothing else* so the structure
11784 would have garbage in all other fields. This might
11785 break something but retaining the previous behavior
11786 here would be just too wrong. */
11788 memset (st
, 0, sizeof (struct stat
));
11789 st
->st_size
= INT_MAX
;
11793 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11794 (gdb_byte
*) &fst
, sizeof (fst
));
11796 if (read_len
!= ret
)
11797 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11799 if (read_len
!= sizeof (fst
))
11800 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11801 read_len
, (int) sizeof (fst
));
11803 remote_fileio_to_host_stat (&fst
, st
);
11808 /* Implementation of to_filesystem_is_local. */
11811 remote_filesystem_is_local (struct target_ops
*self
)
11813 /* Valgrind GDB presents itself as a remote target but works
11814 on the local filesystem: it does not implement remote get
11815 and users are not expected to set a sysroot. To handle
11816 this case we treat the remote filesystem as local if the
11817 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11818 does not support vFile:open. */
11819 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11821 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11823 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11825 int fd
, remote_errno
;
11827 /* Try opening a file to probe support. The supplied
11828 filename is irrelevant, we only care about whether
11829 the stub recognizes the packet or not. */
11830 fd
= remote_hostio_open (self
, NULL
, "just probing",
11831 FILEIO_O_RDONLY
, 0700, 0,
11835 remote_hostio_close (self
, fd
, &remote_errno
);
11837 ps
= packet_support (PACKET_vFile_open
);
11840 if (ps
== PACKET_DISABLE
)
11842 static int warning_issued
= 0;
11844 if (!warning_issued
)
11846 warning (_("remote target does not support file"
11847 " transfer, attempting to access files"
11848 " from local filesystem."));
11849 warning_issued
= 1;
11860 remote_fileio_errno_to_host (int errnum
)
11866 case FILEIO_ENOENT
:
11874 case FILEIO_EACCES
:
11876 case FILEIO_EFAULT
:
11880 case FILEIO_EEXIST
:
11882 case FILEIO_ENODEV
:
11884 case FILEIO_ENOTDIR
:
11886 case FILEIO_EISDIR
:
11888 case FILEIO_EINVAL
:
11890 case FILEIO_ENFILE
:
11892 case FILEIO_EMFILE
:
11896 case FILEIO_ENOSPC
:
11898 case FILEIO_ESPIPE
:
11902 case FILEIO_ENOSYS
:
11904 case FILEIO_ENAMETOOLONG
:
11905 return ENAMETOOLONG
;
11911 remote_hostio_error (int errnum
)
11913 int host_error
= remote_fileio_errno_to_host (errnum
);
11915 if (host_error
== -1)
11916 error (_("Unknown remote I/O error %d"), errnum
);
11918 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11922 remote_hostio_close_cleanup (void *opaque
)
11924 int fd
= *(int *) opaque
;
11927 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
11931 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
11933 struct cleanup
*back_to
, *close_cleanup
;
11934 int retcode
, fd
, remote_errno
, bytes
, io_size
;
11936 int bytes_in_buffer
;
11939 struct remote_state
*rs
= get_remote_state ();
11941 if (!rs
->remote_desc
)
11942 error (_("command can only be used with remote target"));
11944 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
11946 perror_with_name (local_file
);
11948 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11949 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
11951 0700, 0, &remote_errno
);
11953 remote_hostio_error (remote_errno
);
11955 /* Send up to this many bytes at once. They won't all fit in the
11956 remote packet limit, so we'll transfer slightly fewer. */
11957 io_size
= get_remote_packet_size ();
11958 buffer
= (gdb_byte
*) xmalloc (io_size
);
11959 back_to
= make_cleanup (xfree
, buffer
);
11961 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11963 bytes_in_buffer
= 0;
11966 while (bytes_in_buffer
|| !saw_eof
)
11970 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
11971 io_size
- bytes_in_buffer
,
11975 if (ferror (file
.get ()))
11976 error (_("Error reading %s."), local_file
);
11979 /* EOF. Unless there is something still in the
11980 buffer from the last iteration, we are done. */
11982 if (bytes_in_buffer
== 0)
11990 bytes
+= bytes_in_buffer
;
11991 bytes_in_buffer
= 0;
11993 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
11995 offset
, &remote_errno
);
11998 remote_hostio_error (remote_errno
);
11999 else if (retcode
== 0)
12000 error (_("Remote write of %d bytes returned 0!"), bytes
);
12001 else if (retcode
< bytes
)
12003 /* Short write. Save the rest of the read data for the next
12005 bytes_in_buffer
= bytes
- retcode
;
12006 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
12012 discard_cleanups (close_cleanup
);
12013 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12014 remote_hostio_error (remote_errno
);
12017 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12018 do_cleanups (back_to
);
12022 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12024 struct cleanup
*back_to
, *close_cleanup
;
12025 int fd
, remote_errno
, bytes
, io_size
;
12028 struct remote_state
*rs
= get_remote_state ();
12030 if (!rs
->remote_desc
)
12031 error (_("command can only be used with remote target"));
12033 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
12034 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12037 remote_hostio_error (remote_errno
);
12039 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12041 perror_with_name (local_file
);
12043 /* Send up to this many bytes at once. They won't all fit in the
12044 remote packet limit, so we'll transfer slightly fewer. */
12045 io_size
= get_remote_packet_size ();
12046 buffer
= (gdb_byte
*) xmalloc (io_size
);
12047 back_to
= make_cleanup (xfree
, buffer
);
12049 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12054 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
12055 fd
, buffer
, io_size
, offset
, &remote_errno
);
12057 /* Success, but no bytes, means end-of-file. */
12060 remote_hostio_error (remote_errno
);
12064 bytes
= fwrite (buffer
, 1, bytes
, file
.get ());
12066 perror_with_name (local_file
);
12069 discard_cleanups (close_cleanup
);
12070 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12071 remote_hostio_error (remote_errno
);
12074 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12075 do_cleanups (back_to
);
12079 remote_file_delete (const char *remote_file
, int from_tty
)
12081 int retcode
, remote_errno
;
12082 struct remote_state
*rs
= get_remote_state ();
12084 if (!rs
->remote_desc
)
12085 error (_("command can only be used with remote target"));
12087 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
12088 NULL
, remote_file
, &remote_errno
);
12090 remote_hostio_error (remote_errno
);
12093 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12097 remote_put_command (const char *args
, int from_tty
)
12100 error_no_arg (_("file to put"));
12102 gdb_argv
argv (args
);
12103 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12104 error (_("Invalid parameters to remote put"));
12106 remote_file_put (argv
[0], argv
[1], from_tty
);
12110 remote_get_command (const char *args
, int from_tty
)
12113 error_no_arg (_("file to get"));
12115 gdb_argv
argv (args
);
12116 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12117 error (_("Invalid parameters to remote get"));
12119 remote_file_get (argv
[0], argv
[1], from_tty
);
12123 remote_delete_command (const char *args
, int from_tty
)
12126 error_no_arg (_("file to delete"));
12128 gdb_argv
argv (args
);
12129 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12130 error (_("Invalid parameters to remote delete"));
12132 remote_file_delete (argv
[0], from_tty
);
12136 remote_command (const char *args
, int from_tty
)
12138 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12142 remote_can_execute_reverse (struct target_ops
*self
)
12144 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12145 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12152 remote_supports_non_stop (struct target_ops
*self
)
12158 remote_supports_disable_randomization (struct target_ops
*self
)
12160 /* Only supported in extended mode. */
12165 remote_supports_multi_process (struct target_ops
*self
)
12167 struct remote_state
*rs
= get_remote_state ();
12169 return remote_multi_process_p (rs
);
12173 remote_supports_cond_tracepoints (void)
12175 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12179 remote_supports_cond_breakpoints (struct target_ops
*self
)
12181 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12185 remote_supports_fast_tracepoints (void)
12187 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12191 remote_supports_static_tracepoints (void)
12193 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12197 remote_supports_install_in_trace (void)
12199 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12203 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
12205 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12210 remote_supports_string_tracing (struct target_ops
*self
)
12212 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12216 remote_can_run_breakpoint_commands (struct target_ops
*self
)
12218 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12222 remote_trace_init (struct target_ops
*self
)
12224 struct remote_state
*rs
= get_remote_state ();
12227 remote_get_noisy_reply ();
12228 if (strcmp (rs
->buf
, "OK") != 0)
12229 error (_("Target does not support this command."));
12232 /* Recursive routine to walk through command list including loops, and
12233 download packets for each command. */
12236 remote_download_command_source (int num
, ULONGEST addr
,
12237 struct command_line
*cmds
)
12239 struct remote_state
*rs
= get_remote_state ();
12240 struct command_line
*cmd
;
12242 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12244 QUIT
; /* Allow user to bail out with ^C. */
12245 strcpy (rs
->buf
, "QTDPsrc:");
12246 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12247 rs
->buf
+ strlen (rs
->buf
),
12248 rs
->buf_size
- strlen (rs
->buf
));
12250 remote_get_noisy_reply ();
12251 if (strcmp (rs
->buf
, "OK"))
12252 warning (_("Target does not support source download."));
12254 if (cmd
->control_type
== while_control
12255 || cmd
->control_type
== while_stepping_control
)
12257 remote_download_command_source (num
, addr
, *cmd
->body_list
);
12259 QUIT
; /* Allow user to bail out with ^C. */
12260 strcpy (rs
->buf
, "QTDPsrc:");
12261 encode_source_string (num
, addr
, "cmd", "end",
12262 rs
->buf
+ strlen (rs
->buf
),
12263 rs
->buf_size
- strlen (rs
->buf
));
12265 remote_get_noisy_reply ();
12266 if (strcmp (rs
->buf
, "OK"))
12267 warning (_("Target does not support source download."));
12273 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
12275 #define BUF_SIZE 2048
12279 char buf
[BUF_SIZE
];
12280 std::vector
<std::string
> tdp_actions
;
12281 std::vector
<std::string
> stepping_actions
;
12283 struct breakpoint
*b
= loc
->owner
;
12284 struct tracepoint
*t
= (struct tracepoint
*) b
;
12285 struct remote_state
*rs
= get_remote_state ();
12287 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12289 tpaddr
= loc
->address
;
12290 sprintf_vma (addrbuf
, tpaddr
);
12291 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
12292 addrbuf
, /* address */
12293 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12294 t
->step_count
, t
->pass_count
);
12295 /* Fast tracepoints are mostly handled by the target, but we can
12296 tell the target how big of an instruction block should be moved
12298 if (b
->type
== bp_fast_tracepoint
)
12300 /* Only test for support at download time; we may not know
12301 target capabilities at definition time. */
12302 if (remote_supports_fast_tracepoints ())
12304 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12306 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
12307 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12309 /* If it passed validation at definition but fails now,
12310 something is very wrong. */
12311 internal_error (__FILE__
, __LINE__
,
12312 _("Fast tracepoint not "
12313 "valid during download"));
12316 /* Fast tracepoints are functionally identical to regular
12317 tracepoints, so don't take lack of support as a reason to
12318 give up on the trace run. */
12319 warning (_("Target does not support fast tracepoints, "
12320 "downloading %d as regular tracepoint"), b
->number
);
12322 else if (b
->type
== bp_static_tracepoint
)
12324 /* Only test for support at download time; we may not know
12325 target capabilities at definition time. */
12326 if (remote_supports_static_tracepoints ())
12328 struct static_tracepoint_marker marker
;
12330 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12331 strcat (buf
, ":S");
12333 error (_("Static tracepoint not valid during download"));
12336 /* Fast tracepoints are functionally identical to regular
12337 tracepoints, so don't take lack of support as a reason
12338 to give up on the trace run. */
12339 error (_("Target does not support static tracepoints"));
12341 /* If the tracepoint has a conditional, make it into an agent
12342 expression and append to the definition. */
12345 /* Only test support at download time, we may not know target
12346 capabilities at definition time. */
12347 if (remote_supports_cond_tracepoints ())
12349 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
.get ());
12350 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
12352 pkt
= buf
+ strlen (buf
);
12353 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12354 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12358 warning (_("Target does not support conditional tracepoints, "
12359 "ignoring tp %d cond"), b
->number
);
12362 if (b
->commands
|| *default_collect
)
12365 remote_get_noisy_reply ();
12366 if (strcmp (rs
->buf
, "OK"))
12367 error (_("Target does not support tracepoints."));
12369 /* do_single_steps (t); */
12370 for (auto action_it
= tdp_actions
.begin ();
12371 action_it
!= tdp_actions
.end (); action_it
++)
12373 QUIT
; /* Allow user to bail out with ^C. */
12375 bool has_more
= (action_it
!= tdp_actions
.end ()
12376 || !stepping_actions
.empty ());
12378 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
12379 b
->number
, addrbuf
, /* address */
12380 action_it
->c_str (),
12381 has_more
? '-' : 0);
12383 remote_get_noisy_reply ();
12384 if (strcmp (rs
->buf
, "OK"))
12385 error (_("Error on target while setting tracepoints."));
12388 for (auto action_it
= stepping_actions
.begin ();
12389 action_it
!= stepping_actions
.end (); action_it
++)
12391 QUIT
; /* Allow user to bail out with ^C. */
12393 bool is_first
= action_it
== stepping_actions
.begin ();
12394 bool has_more
= action_it
!= stepping_actions
.end ();
12396 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12397 b
->number
, addrbuf
, /* address */
12398 is_first
? "S" : "",
12399 action_it
->c_str (),
12400 has_more
? "-" : "");
12402 remote_get_noisy_reply ();
12403 if (strcmp (rs
->buf
, "OK"))
12404 error (_("Error on target while setting tracepoints."));
12407 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12409 if (b
->location
!= NULL
)
12411 strcpy (buf
, "QTDPsrc:");
12412 encode_source_string (b
->number
, loc
->address
, "at",
12413 event_location_to_string (b
->location
.get ()),
12414 buf
+ strlen (buf
), 2048 - strlen (buf
));
12416 remote_get_noisy_reply ();
12417 if (strcmp (rs
->buf
, "OK"))
12418 warning (_("Target does not support source download."));
12420 if (b
->cond_string
)
12422 strcpy (buf
, "QTDPsrc:");
12423 encode_source_string (b
->number
, loc
->address
,
12424 "cond", b
->cond_string
, buf
+ strlen (buf
),
12425 2048 - strlen (buf
));
12427 remote_get_noisy_reply ();
12428 if (strcmp (rs
->buf
, "OK"))
12429 warning (_("Target does not support source download."));
12431 remote_download_command_source (b
->number
, loc
->address
,
12432 breakpoint_commands (b
));
12437 remote_can_download_tracepoint (struct target_ops
*self
)
12439 struct remote_state
*rs
= get_remote_state ();
12440 struct trace_status
*ts
;
12443 /* Don't try to install tracepoints until we've relocated our
12444 symbols, and fetched and merged the target's tracepoint list with
12446 if (rs
->starting_up
)
12449 ts
= current_trace_status ();
12450 status
= remote_get_trace_status (self
, ts
);
12452 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12455 /* If we are in a tracing experiment, but remote stub doesn't support
12456 installing tracepoint in trace, we have to return. */
12457 if (!remote_supports_install_in_trace ())
12465 remote_download_trace_state_variable (struct target_ops
*self
,
12466 struct trace_state_variable
*tsv
)
12468 struct remote_state
*rs
= get_remote_state ();
12471 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12472 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8),
12474 p
= rs
->buf
+ strlen (rs
->buf
);
12475 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
12476 error (_("Trace state variable name too long for tsv definition packet"));
12477 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, strlen (tsv
->name
));
12480 remote_get_noisy_reply ();
12481 if (*rs
->buf
== '\0')
12482 error (_("Target does not support this command."));
12483 if (strcmp (rs
->buf
, "OK") != 0)
12484 error (_("Error on target while downloading trace state variable."));
12488 remote_enable_tracepoint (struct target_ops
*self
,
12489 struct bp_location
*location
)
12491 struct remote_state
*rs
= get_remote_state ();
12494 sprintf_vma (addr_buf
, location
->address
);
12495 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12496 location
->owner
->number
, addr_buf
);
12498 remote_get_noisy_reply ();
12499 if (*rs
->buf
== '\0')
12500 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12501 if (strcmp (rs
->buf
, "OK") != 0)
12502 error (_("Error on target while enabling tracepoint."));
12506 remote_disable_tracepoint (struct target_ops
*self
,
12507 struct bp_location
*location
)
12509 struct remote_state
*rs
= get_remote_state ();
12512 sprintf_vma (addr_buf
, location
->address
);
12513 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12514 location
->owner
->number
, addr_buf
);
12516 remote_get_noisy_reply ();
12517 if (*rs
->buf
== '\0')
12518 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12519 if (strcmp (rs
->buf
, "OK") != 0)
12520 error (_("Error on target while disabling tracepoint."));
12524 remote_trace_set_readonly_regions (struct target_ops
*self
)
12528 bfd_size_type size
;
12534 return; /* No information to give. */
12536 struct remote_state
*rs
= get_remote_state ();
12538 strcpy (rs
->buf
, "QTro");
12539 offset
= strlen (rs
->buf
);
12540 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12542 char tmp1
[40], tmp2
[40];
12545 if ((s
->flags
& SEC_LOAD
) == 0 ||
12546 /* (s->flags & SEC_CODE) == 0 || */
12547 (s
->flags
& SEC_READONLY
) == 0)
12551 vma
= bfd_get_section_vma (abfd
, s
);
12552 size
= bfd_get_section_size (s
);
12553 sprintf_vma (tmp1
, vma
);
12554 sprintf_vma (tmp2
, vma
+ size
);
12555 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12556 if (offset
+ sec_length
+ 1 > rs
->buf_size
)
12558 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12560 Too many sections for read-only sections definition packet."));
12563 xsnprintf (rs
->buf
+ offset
, rs
->buf_size
- offset
, ":%s,%s",
12565 offset
+= sec_length
;
12570 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12575 remote_trace_start (struct target_ops
*self
)
12577 struct remote_state
*rs
= get_remote_state ();
12579 putpkt ("QTStart");
12580 remote_get_noisy_reply ();
12581 if (*rs
->buf
== '\0')
12582 error (_("Target does not support this command."));
12583 if (strcmp (rs
->buf
, "OK") != 0)
12584 error (_("Bogus reply from target: %s"), rs
->buf
);
12588 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12590 /* Initialize it just to avoid a GCC false warning. */
12592 /* FIXME we need to get register block size some other way. */
12593 extern int trace_regblock_size
;
12594 enum packet_result result
;
12595 struct remote_state
*rs
= get_remote_state ();
12597 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12600 trace_regblock_size
12601 = get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
12603 putpkt ("qTStatus");
12607 p
= remote_get_noisy_reply ();
12609 CATCH (ex
, RETURN_MASK_ERROR
)
12611 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12613 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12616 throw_exception (ex
);
12620 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12622 /* If the remote target doesn't do tracing, flag it. */
12623 if (result
== PACKET_UNKNOWN
)
12626 /* We're working with a live target. */
12627 ts
->filename
= NULL
;
12630 error (_("Bogus trace status reply from target: %s"), rs
->buf
);
12632 /* Function 'parse_trace_status' sets default value of each field of
12633 'ts' at first, so we don't have to do it here. */
12634 parse_trace_status (p
, ts
);
12636 return ts
->running
;
12640 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12641 struct uploaded_tp
*utp
)
12643 struct remote_state
*rs
= get_remote_state ();
12645 struct bp_location
*loc
;
12646 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12647 size_t size
= get_remote_packet_size ();
12652 tp
->traceframe_usage
= 0;
12653 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
12655 /* If the tracepoint was never downloaded, don't go asking for
12657 if (tp
->number_on_target
== 0)
12659 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12660 phex_nz (loc
->address
, 0));
12662 reply
= remote_get_noisy_reply ();
12663 if (reply
&& *reply
)
12666 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12672 utp
->hit_count
= 0;
12673 utp
->traceframe_usage
= 0;
12674 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12675 phex_nz (utp
->addr
, 0));
12677 reply
= remote_get_noisy_reply ();
12678 if (reply
&& *reply
)
12681 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12687 remote_trace_stop (struct target_ops
*self
)
12689 struct remote_state
*rs
= get_remote_state ();
12692 remote_get_noisy_reply ();
12693 if (*rs
->buf
== '\0')
12694 error (_("Target does not support this command."));
12695 if (strcmp (rs
->buf
, "OK") != 0)
12696 error (_("Bogus reply from target: %s"), rs
->buf
);
12700 remote_trace_find (struct target_ops
*self
,
12701 enum trace_find_type type
, int num
,
12702 CORE_ADDR addr1
, CORE_ADDR addr2
,
12705 struct remote_state
*rs
= get_remote_state ();
12706 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12708 int target_frameno
= -1, target_tracept
= -1;
12710 /* Lookups other than by absolute frame number depend on the current
12711 trace selected, so make sure it is correct on the remote end
12713 if (type
!= tfind_number
)
12714 set_remote_traceframe ();
12717 strcpy (p
, "QTFrame:");
12718 p
= strchr (p
, '\0');
12722 xsnprintf (p
, endbuf
- p
, "%x", num
);
12725 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12728 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12731 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12732 phex_nz (addr2
, 0));
12734 case tfind_outside
:
12735 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12736 phex_nz (addr2
, 0));
12739 error (_("Unknown trace find type %d"), type
);
12743 reply
= remote_get_noisy_reply ();
12744 if (*reply
== '\0')
12745 error (_("Target does not support this command."));
12747 while (reply
&& *reply
)
12752 target_frameno
= (int) strtol (p
, &reply
, 16);
12754 error (_("Unable to parse trace frame number"));
12755 /* Don't update our remote traceframe number cache on failure
12756 to select a remote traceframe. */
12757 if (target_frameno
== -1)
12762 target_tracept
= (int) strtol (p
, &reply
, 16);
12764 error (_("Unable to parse tracepoint number"));
12766 case 'O': /* "OK"? */
12767 if (reply
[1] == 'K' && reply
[2] == '\0')
12770 error (_("Bogus reply from target: %s"), reply
);
12773 error (_("Bogus reply from target: %s"), reply
);
12776 *tpp
= target_tracept
;
12778 rs
->remote_traceframe_number
= target_frameno
;
12779 return target_frameno
;
12783 remote_get_trace_state_variable_value (struct target_ops
*self
,
12784 int tsvnum
, LONGEST
*val
)
12786 struct remote_state
*rs
= get_remote_state ();
12790 set_remote_traceframe ();
12792 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12794 reply
= remote_get_noisy_reply ();
12795 if (reply
&& *reply
)
12799 unpack_varlen_hex (reply
+ 1, &uval
);
12800 *val
= (LONGEST
) uval
;
12808 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12810 struct remote_state
*rs
= get_remote_state ();
12814 strcpy (p
, "QTSave:");
12816 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12817 error (_("Remote file name too long for trace save packet"));
12818 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12821 reply
= remote_get_noisy_reply ();
12822 if (*reply
== '\0')
12823 error (_("Target does not support this command."));
12824 if (strcmp (reply
, "OK") != 0)
12825 error (_("Bogus reply from target: %s"), reply
);
12829 /* This is basically a memory transfer, but needs to be its own packet
12830 because we don't know how the target actually organizes its trace
12831 memory, plus we want to be able to ask for as much as possible, but
12832 not be unhappy if we don't get as much as we ask for. */
12835 remote_get_raw_trace_data (struct target_ops
*self
,
12836 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12838 struct remote_state
*rs
= get_remote_state ();
12844 strcpy (p
, "qTBuffer:");
12846 p
+= hexnumstr (p
, offset
);
12848 p
+= hexnumstr (p
, len
);
12852 reply
= remote_get_noisy_reply ();
12853 if (reply
&& *reply
)
12855 /* 'l' by itself means we're at the end of the buffer and
12856 there is nothing more to get. */
12860 /* Convert the reply into binary. Limit the number of bytes to
12861 convert according to our passed-in buffer size, rather than
12862 what was returned in the packet; if the target is
12863 unexpectedly generous and gives us a bigger reply than we
12864 asked for, we don't want to crash. */
12865 rslt
= hex2bin (reply
, buf
, len
);
12869 /* Something went wrong, flag as an error. */
12874 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12876 struct remote_state
*rs
= get_remote_state ();
12878 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12882 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12884 reply
= remote_get_noisy_reply ();
12885 if (*reply
== '\0')
12886 error (_("Target does not support this command."));
12887 if (strcmp (reply
, "OK") != 0)
12888 error (_("Bogus reply from target: %s"), reply
);
12891 warning (_("Target does not support disconnected tracing."));
12895 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12897 struct thread_info
*info
= find_thread_ptid (ptid
);
12899 if (info
!= NULL
&& info
->priv
!= NULL
)
12900 return get_remote_thread_info (info
)->core
;
12906 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12908 struct remote_state
*rs
= get_remote_state ();
12911 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12913 reply
= remote_get_noisy_reply ();
12914 if (*reply
== '\0')
12915 error (_("Target does not support this command."));
12916 if (strcmp (reply
, "OK") != 0)
12917 error (_("Bogus reply from target: %s"), reply
);
12920 static traceframe_info_up
12921 remote_traceframe_info (struct target_ops
*self
)
12923 gdb::unique_xmalloc_ptr
<char> text
12924 = target_read_stralloc (¤t_target
, TARGET_OBJECT_TRACEFRAME_INFO
,
12927 return parse_traceframe_info (text
.get ());
12932 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12933 instruction on which a fast tracepoint may be placed. Returns -1
12934 if the packet is not supported, and 0 if the minimum instruction
12935 length is unknown. */
12938 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
12940 struct remote_state
*rs
= get_remote_state ();
12943 /* If we're not debugging a process yet, the IPA can't be
12945 if (!target_has_execution
)
12948 /* Make sure the remote is pointing at the right process. */
12949 set_general_process ();
12951 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
12953 reply
= remote_get_noisy_reply ();
12954 if (*reply
== '\0')
12958 ULONGEST min_insn_len
;
12960 unpack_varlen_hex (reply
, &min_insn_len
);
12962 return (int) min_insn_len
;
12967 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
12969 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
12971 struct remote_state
*rs
= get_remote_state ();
12972 char *buf
= rs
->buf
;
12973 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12974 enum packet_result result
;
12976 gdb_assert (val
>= 0 || val
== -1);
12977 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
12978 /* Send -1 as literal "-1" to avoid host size dependency. */
12982 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
12985 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
12988 remote_get_noisy_reply ();
12989 result
= packet_ok (rs
->buf
,
12990 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
12992 if (result
!= PACKET_OK
)
12993 warning (_("Bogus reply from target: %s"), rs
->buf
);
12998 remote_set_trace_notes (struct target_ops
*self
,
12999 const char *user
, const char *notes
,
13000 const char *stop_notes
)
13002 struct remote_state
*rs
= get_remote_state ();
13004 char *buf
= rs
->buf
;
13005 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13008 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13011 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13012 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13018 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13019 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13025 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13026 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13030 /* Ensure the buffer is terminated. */
13034 reply
= remote_get_noisy_reply ();
13035 if (*reply
== '\0')
13038 if (strcmp (reply
, "OK") != 0)
13039 error (_("Bogus reply from target: %s"), reply
);
13045 remote_use_agent (struct target_ops
*self
, int use
)
13047 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13049 struct remote_state
*rs
= get_remote_state ();
13051 /* If the stub supports QAgent. */
13052 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13054 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13056 if (strcmp (rs
->buf
, "OK") == 0)
13067 remote_can_use_agent (struct target_ops
*self
)
13069 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13072 struct btrace_target_info
13074 /* The ptid of the traced thread. */
13077 /* The obtained branch trace configuration. */
13078 struct btrace_config conf
;
13081 /* Reset our idea of our target's btrace configuration. */
13084 remote_btrace_reset (void)
13086 struct remote_state
*rs
= get_remote_state ();
13088 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13091 /* Check whether the target supports branch tracing. */
13094 remote_supports_btrace (struct target_ops
*self
, enum btrace_format format
)
13096 if (packet_support (PACKET_Qbtrace_off
) != PACKET_ENABLE
)
13098 if (packet_support (PACKET_qXfer_btrace
) != PACKET_ENABLE
)
13103 case BTRACE_FORMAT_NONE
:
13106 case BTRACE_FORMAT_BTS
:
13107 return (packet_support (PACKET_Qbtrace_bts
) == PACKET_ENABLE
);
13109 case BTRACE_FORMAT_PT
:
13110 /* The trace is decoded on the host. Even if our target supports it,
13111 we still need to have libipt to decode the trace. */
13112 #if defined (HAVE_LIBIPT)
13113 return (packet_support (PACKET_Qbtrace_pt
) == PACKET_ENABLE
);
13114 #else /* !defined (HAVE_LIBIPT) */
13116 #endif /* !defined (HAVE_LIBIPT) */
13119 internal_error (__FILE__
, __LINE__
, _("Unknown branch trace format"));
13122 /* Synchronize the configuration with the target. */
13125 btrace_sync_conf (const struct btrace_config
*conf
)
13127 struct packet_config
*packet
;
13128 struct remote_state
*rs
;
13129 char *buf
, *pos
, *endbuf
;
13131 rs
= get_remote_state ();
13133 endbuf
= buf
+ get_remote_packet_size ();
13135 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13136 if (packet_config_support (packet
) == PACKET_ENABLE
13137 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13140 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13144 getpkt (&buf
, &rs
->buf_size
, 0);
13146 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13148 if (buf
[0] == 'E' && buf
[1] == '.')
13149 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13151 error (_("Failed to configure the BTS buffer size."));
13154 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13157 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13158 if (packet_config_support (packet
) == PACKET_ENABLE
13159 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13162 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13166 getpkt (&buf
, &rs
->buf_size
, 0);
13168 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13170 if (buf
[0] == 'E' && buf
[1] == '.')
13171 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13173 error (_("Failed to configure the trace buffer size."));
13176 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13180 /* Read the current thread's btrace configuration from the target and
13181 store it into CONF. */
13184 btrace_read_config (struct btrace_config
*conf
)
13186 gdb::unique_xmalloc_ptr
<char> xml
13187 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE_CONF
, "");
13189 parse_xml_btrace_conf (conf
, xml
.get ());
13192 /* Maybe reopen target btrace. */
13195 remote_btrace_maybe_reopen (void)
13197 struct remote_state
*rs
= get_remote_state ();
13198 struct thread_info
*tp
;
13199 int btrace_target_pushed
= 0;
13202 scoped_restore_current_thread restore_thread
;
13204 ALL_NON_EXITED_THREADS (tp
)
13206 set_general_thread (tp
->ptid
);
13208 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13209 btrace_read_config (&rs
->btrace_config
);
13211 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13214 #if !defined (HAVE_LIBIPT)
13215 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13220 warning (_("GDB does not support Intel Processor Trace. "
13221 "\"record\" will not work in this session."));
13226 #endif /* !defined (HAVE_LIBIPT) */
13228 /* Push target, once, but before anything else happens. This way our
13229 changes to the threads will be cleaned up by unpushing the target
13230 in case btrace_read_config () throws. */
13231 if (!btrace_target_pushed
)
13233 btrace_target_pushed
= 1;
13234 record_btrace_push_target ();
13235 printf_filtered (_("Target is recording using %s.\n"),
13236 btrace_format_string (rs
->btrace_config
.format
));
13239 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13240 tp
->btrace
.target
->ptid
= tp
->ptid
;
13241 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13245 /* Enable branch tracing. */
13247 static struct btrace_target_info
*
13248 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
13249 const struct btrace_config
*conf
)
13251 struct btrace_target_info
*tinfo
= NULL
;
13252 struct packet_config
*packet
= NULL
;
13253 struct remote_state
*rs
= get_remote_state ();
13254 char *buf
= rs
->buf
;
13255 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13257 switch (conf
->format
)
13259 case BTRACE_FORMAT_BTS
:
13260 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13263 case BTRACE_FORMAT_PT
:
13264 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13268 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13269 error (_("Target does not support branch tracing."));
13271 btrace_sync_conf (conf
);
13273 set_general_thread (ptid
);
13275 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13277 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13279 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13281 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13282 error (_("Could not enable branch tracing for %s: %s"),
13283 target_pid_to_str (ptid
), rs
->buf
+ 2);
13285 error (_("Could not enable branch tracing for %s."),
13286 target_pid_to_str (ptid
));
13289 tinfo
= XCNEW (struct btrace_target_info
);
13290 tinfo
->ptid
= ptid
;
13292 /* If we fail to read the configuration, we lose some information, but the
13293 tracing itself is not impacted. */
13296 btrace_read_config (&tinfo
->conf
);
13298 CATCH (err
, RETURN_MASK_ERROR
)
13300 if (err
.message
!= NULL
)
13301 warning ("%s", err
.message
);
13308 /* Disable branch tracing. */
13311 remote_disable_btrace (struct target_ops
*self
,
13312 struct btrace_target_info
*tinfo
)
13314 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13315 struct remote_state
*rs
= get_remote_state ();
13316 char *buf
= rs
->buf
;
13317 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13319 if (packet_config_support (packet
) != PACKET_ENABLE
)
13320 error (_("Target does not support branch tracing."));
13322 set_general_thread (tinfo
->ptid
);
13324 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13326 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13328 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13330 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13331 error (_("Could not disable branch tracing for %s: %s"),
13332 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13334 error (_("Could not disable branch tracing for %s."),
13335 target_pid_to_str (tinfo
->ptid
));
13341 /* Teardown branch tracing. */
13344 remote_teardown_btrace (struct target_ops
*self
,
13345 struct btrace_target_info
*tinfo
)
13347 /* We must not talk to the target during teardown. */
13351 /* Read the branch trace. */
13353 static enum btrace_error
13354 remote_read_btrace (struct target_ops
*self
,
13355 struct btrace_data
*btrace
,
13356 struct btrace_target_info
*tinfo
,
13357 enum btrace_read_type type
)
13359 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13362 if (packet_config_support (packet
) != PACKET_ENABLE
)
13363 error (_("Target does not support branch tracing."));
13365 #if !defined(HAVE_LIBEXPAT)
13366 error (_("Cannot process branch tracing result. XML parsing not supported."));
13371 case BTRACE_READ_ALL
:
13374 case BTRACE_READ_NEW
:
13377 case BTRACE_READ_DELTA
:
13381 internal_error (__FILE__
, __LINE__
,
13382 _("Bad branch tracing read type: %u."),
13383 (unsigned int) type
);
13386 gdb::unique_xmalloc_ptr
<char> xml
13387 = target_read_stralloc (¤t_target
, TARGET_OBJECT_BTRACE
, annex
);
13389 return BTRACE_ERR_UNKNOWN
;
13391 parse_xml_btrace (btrace
, xml
.get ());
13393 return BTRACE_ERR_NONE
;
13396 static const struct btrace_config
*
13397 remote_btrace_conf (struct target_ops
*self
,
13398 const struct btrace_target_info
*tinfo
)
13400 return &tinfo
->conf
;
13404 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
13406 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13410 /* Implementation of to_load. */
13413 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
13415 generic_load (name
, from_tty
);
13418 /* Accepts an integer PID; returns a string representing a file that
13419 can be opened on the remote side to get the symbols for the child
13420 process. Returns NULL if the operation is not supported. */
13423 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13425 static gdb::unique_xmalloc_ptr
<char> filename
;
13426 struct inferior
*inf
;
13427 char *annex
= NULL
;
13429 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13432 inf
= find_inferior_pid (pid
);
13434 internal_error (__FILE__
, __LINE__
,
13435 _("not currently attached to process %d"), pid
);
13437 if (!inf
->fake_pid_p
)
13439 const int annex_size
= 9;
13441 annex
= (char *) alloca (annex_size
);
13442 xsnprintf (annex
, annex_size
, "%x", pid
);
13445 filename
= target_read_stralloc (¤t_target
,
13446 TARGET_OBJECT_EXEC_FILE
, annex
);
13448 return filename
.get ();
13451 /* Implement the to_can_do_single_step target_ops method. */
13454 remote_can_do_single_step (struct target_ops
*ops
)
13456 /* We can only tell whether target supports single step or not by
13457 supported s and S vCont actions if the stub supports vContSupported
13458 feature. If the stub doesn't support vContSupported feature,
13459 we have conservatively to think target doesn't supports single
13461 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13463 struct remote_state
*rs
= get_remote_state ();
13465 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13466 remote_vcont_probe (rs
);
13468 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13474 /* Implementation of the to_execution_direction method for the remote
13477 static enum exec_direction_kind
13478 remote_execution_direction (struct target_ops
*self
)
13480 struct remote_state
*rs
= get_remote_state ();
13482 return rs
->last_resume_exec_dir
;
13485 /* Return pointer to the thread_info struct which corresponds to
13486 THREAD_HANDLE (having length HANDLE_LEN). */
13488 static struct thread_info
*
13489 remote_thread_handle_to_thread_info (struct target_ops
*ops
,
13490 const gdb_byte
*thread_handle
,
13492 struct inferior
*inf
)
13494 struct thread_info
*tp
;
13496 ALL_NON_EXITED_THREADS (tp
)
13498 remote_thread_info
*priv
= get_remote_thread_info (tp
);
13500 if (tp
->inf
== inf
&& priv
!= NULL
)
13502 if (handle_len
!= priv
->thread_handle
.size ())
13503 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13504 handle_len
, priv
->thread_handle
.size ());
13505 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
13515 init_remote_ops (void)
13517 remote_ops
.to_shortname
= "remote";
13518 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13519 remote_ops
.to_doc
=
13520 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13521 Specify the serial device it is connected to\n\
13522 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13523 remote_ops
.to_open
= remote_open
;
13524 remote_ops
.to_close
= remote_close
;
13525 remote_ops
.to_detach
= remote_detach
;
13526 remote_ops
.to_disconnect
= remote_disconnect
;
13527 remote_ops
.to_resume
= remote_resume
;
13528 remote_ops
.to_commit_resume
= remote_commit_resume
;
13529 remote_ops
.to_wait
= remote_wait
;
13530 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13531 remote_ops
.to_store_registers
= remote_store_registers
;
13532 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13533 remote_ops
.to_files_info
= remote_files_info
;
13534 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13535 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13536 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13537 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13538 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13539 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13540 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13541 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13542 remote_ops
.to_watchpoint_addr_within_range
=
13543 remote_watchpoint_addr_within_range
;
13544 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13545 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13546 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13547 remote_ops
.to_region_ok_for_hw_watchpoint
13548 = remote_region_ok_for_hw_watchpoint
;
13549 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13550 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13551 remote_ops
.to_kill
= remote_kill
;
13552 remote_ops
.to_load
= remote_load
;
13553 remote_ops
.to_mourn_inferior
= remote_mourn
;
13554 remote_ops
.to_pass_signals
= remote_pass_signals
;
13555 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13556 remote_ops
.to_program_signals
= remote_program_signals
;
13557 remote_ops
.to_thread_alive
= remote_thread_alive
;
13558 remote_ops
.to_thread_name
= remote_thread_name
;
13559 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13560 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13561 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13562 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13563 remote_ops
.to_stop
= remote_stop
;
13564 remote_ops
.to_interrupt
= remote_interrupt
;
13565 remote_ops
.to_pass_ctrlc
= remote_pass_ctrlc
;
13566 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13567 remote_ops
.to_get_memory_xfer_limit
= remote_get_memory_xfer_limit
;
13568 remote_ops
.to_rcmd
= remote_rcmd
;
13569 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13570 remote_ops
.to_log_command
= serial_log_command
;
13571 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13572 remote_ops
.to_stratum
= process_stratum
;
13573 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13574 remote_ops
.to_has_memory
= default_child_has_memory
;
13575 remote_ops
.to_has_stack
= default_child_has_stack
;
13576 remote_ops
.to_has_registers
= default_child_has_registers
;
13577 remote_ops
.to_has_execution
= default_child_has_execution
;
13578 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13579 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13580 remote_ops
.to_magic
= OPS_MAGIC
;
13581 remote_ops
.to_memory_map
= remote_memory_map
;
13582 remote_ops
.to_flash_erase
= remote_flash_erase
;
13583 remote_ops
.to_flash_done
= remote_flash_done
;
13584 remote_ops
.to_read_description
= remote_read_description
;
13585 remote_ops
.to_search_memory
= remote_search_memory
;
13586 remote_ops
.to_can_async_p
= remote_can_async_p
;
13587 remote_ops
.to_is_async_p
= remote_is_async_p
;
13588 remote_ops
.to_async
= remote_async
;
13589 remote_ops
.to_thread_events
= remote_thread_events
;
13590 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13591 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13592 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13593 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13594 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13595 remote_ops
.to_supports_disable_randomization
13596 = remote_supports_disable_randomization
;
13597 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13598 remote_ops
.to_fileio_open
= remote_hostio_open
;
13599 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13600 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13601 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13602 remote_ops
.to_fileio_close
= remote_hostio_close
;
13603 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13604 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13605 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13606 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13607 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13608 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13609 remote_ops
.to_trace_init
= remote_trace_init
;
13610 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13611 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13612 remote_ops
.to_download_trace_state_variable
13613 = remote_download_trace_state_variable
;
13614 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13615 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13616 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13617 remote_ops
.to_trace_start
= remote_trace_start
;
13618 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13619 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13620 remote_ops
.to_trace_stop
= remote_trace_stop
;
13621 remote_ops
.to_trace_find
= remote_trace_find
;
13622 remote_ops
.to_get_trace_state_variable_value
13623 = remote_get_trace_state_variable_value
;
13624 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13625 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13626 remote_ops
.to_upload_trace_state_variables
13627 = remote_upload_trace_state_variables
;
13628 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13629 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13630 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13631 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13632 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13633 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13634 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13635 remote_ops
.to_verify_memory
= remote_verify_memory
;
13636 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13637 remote_ops
.to_set_permissions
= remote_set_permissions
;
13638 remote_ops
.to_static_tracepoint_marker_at
13639 = remote_static_tracepoint_marker_at
;
13640 remote_ops
.to_static_tracepoint_markers_by_strid
13641 = remote_static_tracepoint_markers_by_strid
;
13642 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13643 remote_ops
.to_use_agent
= remote_use_agent
;
13644 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13645 remote_ops
.to_supports_btrace
= remote_supports_btrace
;
13646 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13647 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13648 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13649 remote_ops
.to_read_btrace
= remote_read_btrace
;
13650 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13651 remote_ops
.to_augmented_libraries_svr4_read
=
13652 remote_augmented_libraries_svr4_read
;
13653 remote_ops
.to_follow_fork
= remote_follow_fork
;
13654 remote_ops
.to_follow_exec
= remote_follow_exec
;
13655 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13656 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13657 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13658 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13659 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13660 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13661 remote_ops
.to_execution_direction
= remote_execution_direction
;
13662 remote_ops
.to_thread_handle_to_thread_info
=
13663 remote_thread_handle_to_thread_info
;
13666 /* Set up the extended remote vector by making a copy of the standard
13667 remote vector and adding to it. */
13670 init_extended_remote_ops (void)
13672 extended_remote_ops
= remote_ops
;
13674 extended_remote_ops
.to_shortname
= "extended-remote";
13675 extended_remote_ops
.to_longname
=
13676 "Extended remote serial target in gdb-specific protocol";
13677 extended_remote_ops
.to_doc
=
13678 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13679 Specify the serial device it is connected to (e.g. /dev/ttya).";
13680 extended_remote_ops
.to_open
= extended_remote_open
;
13681 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13682 extended_remote_ops
.to_detach
= extended_remote_detach
;
13683 extended_remote_ops
.to_attach
= extended_remote_attach
;
13684 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13685 extended_remote_ops
.to_supports_disable_randomization
13686 = extended_remote_supports_disable_randomization
;
13690 remote_can_async_p (struct target_ops
*ops
)
13692 struct remote_state
*rs
= get_remote_state ();
13694 /* We don't go async if the user has explicitly prevented it with the
13695 "maint set target-async" command. */
13696 if (!target_async_permitted
)
13699 /* We're async whenever the serial device is. */
13700 return serial_can_async_p (rs
->remote_desc
);
13704 remote_is_async_p (struct target_ops
*ops
)
13706 struct remote_state
*rs
= get_remote_state ();
13708 if (!target_async_permitted
)
13709 /* We only enable async when the user specifically asks for it. */
13712 /* We're async whenever the serial device is. */
13713 return serial_is_async_p (rs
->remote_desc
);
13716 /* Pass the SERIAL event on and up to the client. One day this code
13717 will be able to delay notifying the client of an event until the
13718 point where an entire packet has been received. */
13720 static serial_event_ftype remote_async_serial_handler
;
13723 remote_async_serial_handler (struct serial
*scb
, void *context
)
13725 /* Don't propogate error information up to the client. Instead let
13726 the client find out about the error by querying the target. */
13727 inferior_event_handler (INF_REG_EVENT
, NULL
);
13731 remote_async_inferior_event_handler (gdb_client_data data
)
13733 inferior_event_handler (INF_REG_EVENT
, NULL
);
13737 remote_async (struct target_ops
*ops
, int enable
)
13739 struct remote_state
*rs
= get_remote_state ();
13743 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13745 /* If there are pending events in the stop reply queue tell the
13746 event loop to process them. */
13747 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13748 mark_async_event_handler (remote_async_inferior_event_token
);
13749 /* For simplicity, below we clear the pending events token
13750 without remembering whether it is marked, so here we always
13751 mark it. If there's actually no pending notification to
13752 process, this ends up being a no-op (other than a spurious
13753 event-loop wakeup). */
13754 if (target_is_non_stop_p ())
13755 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13759 serial_async (rs
->remote_desc
, NULL
, NULL
);
13760 /* If the core is disabling async, it doesn't want to be
13761 disturbed with target events. Clear all async event sources
13763 clear_async_event_handler (remote_async_inferior_event_token
);
13764 if (target_is_non_stop_p ())
13765 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13769 /* Implementation of the to_thread_events method. */
13772 remote_thread_events (struct target_ops
*ops
, int enable
)
13774 struct remote_state
*rs
= get_remote_state ();
13775 size_t size
= get_remote_packet_size ();
13777 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13780 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13782 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13784 switch (packet_ok (rs
->buf
,
13785 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13788 if (strcmp (rs
->buf
, "OK") != 0)
13789 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13792 warning (_("Remote failure reply: %s"), rs
->buf
);
13794 case PACKET_UNKNOWN
:
13800 set_remote_cmd (const char *args
, int from_tty
)
13802 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13806 show_remote_cmd (const char *args
, int from_tty
)
13808 /* We can't just use cmd_show_list here, because we want to skip
13809 the redundant "show remote Z-packet" and the legacy aliases. */
13810 struct cmd_list_element
*list
= remote_show_cmdlist
;
13811 struct ui_out
*uiout
= current_uiout
;
13813 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
13814 for (; list
!= NULL
; list
= list
->next
)
13815 if (strcmp (list
->name
, "Z-packet") == 0)
13817 else if (list
->type
== not_set_cmd
)
13818 /* Alias commands are exactly like the original, except they
13819 don't have the normal type. */
13823 ui_out_emit_tuple
option_emitter (uiout
, "option");
13825 uiout
->field_string ("name", list
->name
);
13826 uiout
->text (": ");
13827 if (list
->type
== show_cmd
)
13828 do_show_command (NULL
, from_tty
, list
);
13830 cmd_func (list
, NULL
, from_tty
);
13835 /* Function to be called whenever a new objfile (shlib) is detected. */
13837 remote_new_objfile (struct objfile
*objfile
)
13839 struct remote_state
*rs
= get_remote_state ();
13841 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13842 remote_check_symbols ();
13845 /* Pull all the tracepoints defined on the target and create local
13846 data structures representing them. We don't want to create real
13847 tracepoints yet, we don't want to mess up the user's existing
13851 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13853 struct remote_state
*rs
= get_remote_state ();
13856 /* Ask for a first packet of tracepoint definition. */
13858 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13860 while (*p
&& *p
!= 'l')
13862 parse_tracepoint_definition (p
, utpp
);
13863 /* Ask for another packet of tracepoint definition. */
13865 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13872 remote_upload_trace_state_variables (struct target_ops
*self
,
13873 struct uploaded_tsv
**utsvp
)
13875 struct remote_state
*rs
= get_remote_state ();
13878 /* Ask for a first packet of variable definition. */
13880 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13882 while (*p
&& *p
!= 'l')
13884 parse_tsv_definition (p
, utsvp
);
13885 /* Ask for another packet of variable definition. */
13887 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13893 /* The "set/show range-stepping" show hook. */
13896 show_range_stepping (struct ui_file
*file
, int from_tty
,
13897 struct cmd_list_element
*c
,
13900 fprintf_filtered (file
,
13901 _("Debugger's willingness to use range stepping "
13902 "is %s.\n"), value
);
13905 /* The "set/show range-stepping" set hook. */
13908 set_range_stepping (const char *ignore_args
, int from_tty
,
13909 struct cmd_list_element
*c
)
13911 struct remote_state
*rs
= get_remote_state ();
13913 /* Whene enabling, check whether range stepping is actually
13914 supported by the target, and warn if not. */
13915 if (use_range_stepping
)
13917 if (rs
->remote_desc
!= NULL
)
13919 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13920 remote_vcont_probe (rs
);
13922 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13923 && rs
->supports_vCont
.r
)
13927 warning (_("Range stepping is not supported by the current target"));
13932 _initialize_remote (void)
13934 struct cmd_list_element
*cmd
;
13935 const char *cmd_name
;
13937 /* architecture specific data */
13938 remote_gdbarch_data_handle
=
13939 gdbarch_data_register_post_init (init_remote_state
);
13940 remote_g_packet_data_handle
=
13941 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
13944 = register_program_space_data_with_cleanup (NULL
,
13945 remote_pspace_data_cleanup
);
13947 /* Initialize the per-target state. At the moment there is only one
13948 of these, not one per target. Only one target is active at a
13950 remote_state
= new_remote_state ();
13952 init_remote_ops ();
13953 add_target (&remote_ops
);
13955 init_extended_remote_ops ();
13956 add_target (&extended_remote_ops
);
13958 /* Hook into new objfile notification. */
13959 observer_attach_new_objfile (remote_new_objfile
);
13960 /* We're no longer interested in notification events of an inferior
13962 observer_attach_inferior_exit (discard_pending_stop_replies
);
13965 init_remote_threadtests ();
13968 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
13969 /* set/show remote ... */
13971 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
13972 Remote protocol specific variables\n\
13973 Configure various remote-protocol specific variables such as\n\
13974 the packets being used"),
13975 &remote_set_cmdlist
, "set remote ",
13976 0 /* allow-unknown */, &setlist
);
13977 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
13978 Remote protocol specific variables\n\
13979 Configure various remote-protocol specific variables such as\n\
13980 the packets being used"),
13981 &remote_show_cmdlist
, "show remote ",
13982 0 /* allow-unknown */, &showlist
);
13984 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
13985 Compare section data on target to the exec file.\n\
13986 Argument is a single section name (default: all loaded sections).\n\
13987 To compare only read-only loaded sections, specify the -r option."),
13990 add_cmd ("packet", class_maintenance
, packet_command
, _("\
13991 Send an arbitrary packet to a remote target.\n\
13992 maintenance packet TEXT\n\
13993 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13994 this command sends the string TEXT to the inferior, and displays the\n\
13995 response packet. GDB supplies the initial `$' character, and the\n\
13996 terminating `#' character and checksum."),
13999 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14000 Set whether to send break if interrupted."), _("\
14001 Show whether to send break if interrupted."), _("\
14002 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14003 set_remotebreak
, show_remotebreak
,
14004 &setlist
, &showlist
);
14005 cmd_name
= "remotebreak";
14006 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
14007 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14008 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14009 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
14010 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14012 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14013 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14015 Set interrupt sequence to remote target."), _("\
14016 Show interrupt sequence to remote target."), _("\
14017 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14018 NULL
, show_interrupt_sequence
,
14019 &remote_set_cmdlist
,
14020 &remote_show_cmdlist
);
14022 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14023 &interrupt_on_connect
, _("\
14024 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14025 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14026 If set, interrupt sequence is sent to remote target."),
14028 &remote_set_cmdlist
, &remote_show_cmdlist
);
14030 /* Install commands for configuring memory read/write packets. */
14032 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14033 Set the maximum number of bytes per memory write packet (deprecated)."),
14035 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14036 Show the maximum number of bytes per memory write packet (deprecated)."),
14038 add_cmd ("memory-write-packet-size", no_class
,
14039 set_memory_write_packet_size
, _("\
14040 Set the maximum number of bytes per memory-write packet.\n\
14041 Specify the number of bytes in a packet or 0 (zero) for the\n\
14042 default packet size. The actual limit is further reduced\n\
14043 dependent on the target. Specify ``fixed'' to disable the\n\
14044 further restriction and ``limit'' to enable that restriction."),
14045 &remote_set_cmdlist
);
14046 add_cmd ("memory-read-packet-size", no_class
,
14047 set_memory_read_packet_size
, _("\
14048 Set the maximum number of bytes per memory-read packet.\n\
14049 Specify the number of bytes in a packet or 0 (zero) for the\n\
14050 default packet size. The actual limit is further reduced\n\
14051 dependent on the target. Specify ``fixed'' to disable the\n\
14052 further restriction and ``limit'' to enable that restriction."),
14053 &remote_set_cmdlist
);
14054 add_cmd ("memory-write-packet-size", no_class
,
14055 show_memory_write_packet_size
,
14056 _("Show the maximum number of bytes per memory-write packet."),
14057 &remote_show_cmdlist
);
14058 add_cmd ("memory-read-packet-size", no_class
,
14059 show_memory_read_packet_size
,
14060 _("Show the maximum number of bytes per memory-read packet."),
14061 &remote_show_cmdlist
);
14063 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
14064 &remote_hw_watchpoint_limit
, _("\
14065 Set the maximum number of target hardware watchpoints."), _("\
14066 Show the maximum number of target hardware watchpoints."), _("\
14067 Specify a negative limit for unlimited."),
14068 NULL
, NULL
, /* FIXME: i18n: The maximum
14069 number of target hardware
14070 watchpoints is %s. */
14071 &remote_set_cmdlist
, &remote_show_cmdlist
);
14072 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
14073 &remote_hw_watchpoint_length_limit
, _("\
14074 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14075 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14076 Specify a negative limit for unlimited."),
14077 NULL
, NULL
, /* FIXME: i18n: The maximum
14078 length (in bytes) of a target
14079 hardware watchpoint is %s. */
14080 &remote_set_cmdlist
, &remote_show_cmdlist
);
14081 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
14082 &remote_hw_breakpoint_limit
, _("\
14083 Set the maximum number of target hardware breakpoints."), _("\
14084 Show the maximum number of target hardware breakpoints."), _("\
14085 Specify a negative limit for unlimited."),
14086 NULL
, NULL
, /* FIXME: i18n: The maximum
14087 number of target hardware
14088 breakpoints is %s. */
14089 &remote_set_cmdlist
, &remote_show_cmdlist
);
14091 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14092 &remote_address_size
, _("\
14093 Set the maximum size of the address (in bits) in a memory packet."), _("\
14094 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14096 NULL
, /* FIXME: i18n: */
14097 &setlist
, &showlist
);
14099 init_all_packet_configs ();
14101 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14102 "X", "binary-download", 1);
14104 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14105 "vCont", "verbose-resume", 0);
14107 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14108 "QPassSignals", "pass-signals", 0);
14110 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14111 "QCatchSyscalls", "catch-syscalls", 0);
14113 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14114 "QProgramSignals", "program-signals", 0);
14116 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14117 "QSetWorkingDir", "set-working-dir", 0);
14119 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14120 "QStartupWithShell", "startup-with-shell", 0);
14122 add_packet_config_cmd (&remote_protocol_packets
14123 [PACKET_QEnvironmentHexEncoded
],
14124 "QEnvironmentHexEncoded", "environment-hex-encoded",
14127 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14128 "QEnvironmentReset", "environment-reset",
14131 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14132 "QEnvironmentUnset", "environment-unset",
14135 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14136 "qSymbol", "symbol-lookup", 0);
14138 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14139 "P", "set-register", 1);
14141 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14142 "p", "fetch-register", 1);
14144 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14145 "Z0", "software-breakpoint", 0);
14147 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14148 "Z1", "hardware-breakpoint", 0);
14150 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14151 "Z2", "write-watchpoint", 0);
14153 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14154 "Z3", "read-watchpoint", 0);
14156 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14157 "Z4", "access-watchpoint", 0);
14159 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14160 "qXfer:auxv:read", "read-aux-vector", 0);
14162 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14163 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14165 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14166 "qXfer:features:read", "target-features", 0);
14168 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14169 "qXfer:libraries:read", "library-info", 0);
14171 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14172 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14174 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14175 "qXfer:memory-map:read", "memory-map", 0);
14177 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14178 "qXfer:spu:read", "read-spu-object", 0);
14180 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14181 "qXfer:spu:write", "write-spu-object", 0);
14183 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14184 "qXfer:osdata:read", "osdata", 0);
14186 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14187 "qXfer:threads:read", "threads", 0);
14189 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14190 "qXfer:siginfo:read", "read-siginfo-object", 0);
14192 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14193 "qXfer:siginfo:write", "write-siginfo-object", 0);
14195 add_packet_config_cmd
14196 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14197 "qXfer:traceframe-info:read", "traceframe-info", 0);
14199 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14200 "qXfer:uib:read", "unwind-info-block", 0);
14202 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14203 "qGetTLSAddr", "get-thread-local-storage-address",
14206 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14207 "qGetTIBAddr", "get-thread-information-block-address",
14210 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14211 "bc", "reverse-continue", 0);
14213 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14214 "bs", "reverse-step", 0);
14216 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14217 "qSupported", "supported-packets", 0);
14219 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14220 "qSearch:memory", "search-memory", 0);
14222 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14223 "qTStatus", "trace-status", 0);
14225 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14226 "vFile:setfs", "hostio-setfs", 0);
14228 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14229 "vFile:open", "hostio-open", 0);
14231 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14232 "vFile:pread", "hostio-pread", 0);
14234 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14235 "vFile:pwrite", "hostio-pwrite", 0);
14237 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14238 "vFile:close", "hostio-close", 0);
14240 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14241 "vFile:unlink", "hostio-unlink", 0);
14243 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14244 "vFile:readlink", "hostio-readlink", 0);
14246 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14247 "vFile:fstat", "hostio-fstat", 0);
14249 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14250 "vAttach", "attach", 0);
14252 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14255 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14256 "QStartNoAckMode", "noack", 0);
14258 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14259 "vKill", "kill", 0);
14261 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14262 "qAttached", "query-attached", 0);
14264 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14265 "ConditionalTracepoints",
14266 "conditional-tracepoints", 0);
14268 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14269 "ConditionalBreakpoints",
14270 "conditional-breakpoints", 0);
14272 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14273 "BreakpointCommands",
14274 "breakpoint-commands", 0);
14276 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14277 "FastTracepoints", "fast-tracepoints", 0);
14279 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14280 "TracepointSource", "TracepointSource", 0);
14282 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14283 "QAllow", "allow", 0);
14285 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14286 "StaticTracepoints", "static-tracepoints", 0);
14288 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14289 "InstallInTrace", "install-in-trace", 0);
14291 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14292 "qXfer:statictrace:read", "read-sdata-object", 0);
14294 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14295 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14297 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14298 "QDisableRandomization", "disable-randomization", 0);
14300 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14301 "QAgent", "agent", 0);
14303 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14304 "QTBuffer:size", "trace-buffer-size", 0);
14306 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14307 "Qbtrace:off", "disable-btrace", 0);
14309 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14310 "Qbtrace:bts", "enable-btrace-bts", 0);
14312 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14313 "Qbtrace:pt", "enable-btrace-pt", 0);
14315 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14316 "qXfer:btrace", "read-btrace", 0);
14318 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14319 "qXfer:btrace-conf", "read-btrace-conf", 0);
14321 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14322 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14324 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14325 "multiprocess-feature", "multiprocess-feature", 0);
14327 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14328 "swbreak-feature", "swbreak-feature", 0);
14330 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14331 "hwbreak-feature", "hwbreak-feature", 0);
14333 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14334 "fork-event-feature", "fork-event-feature", 0);
14336 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14337 "vfork-event-feature", "vfork-event-feature", 0);
14339 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14340 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14342 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14343 "vContSupported", "verbose-resume-supported", 0);
14345 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14346 "exec-event-feature", "exec-event-feature", 0);
14348 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14349 "vCtrlC", "ctrl-c", 0);
14351 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14352 "QThreadEvents", "thread-events", 0);
14354 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14355 "N stop reply", "no-resumed-stop-reply", 0);
14357 /* Assert that we've registered "set remote foo-packet" commands
14358 for all packet configs. */
14362 for (i
= 0; i
< PACKET_MAX
; i
++)
14364 /* Ideally all configs would have a command associated. Some
14365 still don't though. */
14370 case PACKET_QNonStop
:
14371 case PACKET_EnableDisableTracepoints_feature
:
14372 case PACKET_tracenz_feature
:
14373 case PACKET_DisconnectedTracing_feature
:
14374 case PACKET_augmented_libraries_svr4_read_feature
:
14376 /* Additions to this list need to be well justified:
14377 pre-existing packets are OK; new packets are not. */
14385 /* This catches both forgetting to add a config command, and
14386 forgetting to remove a packet from the exception list. */
14387 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14391 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14392 Z sub-packet has its own set and show commands, but users may
14393 have sets to this variable in their .gdbinit files (or in their
14395 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14396 &remote_Z_packet_detect
, _("\
14397 Set use of remote protocol `Z' packets"), _("\
14398 Show use of remote protocol `Z' packets "), _("\
14399 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14401 set_remote_protocol_Z_packet_cmd
,
14402 show_remote_protocol_Z_packet_cmd
,
14403 /* FIXME: i18n: Use of remote protocol
14404 `Z' packets is %s. */
14405 &remote_set_cmdlist
, &remote_show_cmdlist
);
14407 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14408 Manipulate files on the remote system\n\
14409 Transfer files to and from the remote target system."),
14410 &remote_cmdlist
, "remote ",
14411 0 /* allow-unknown */, &cmdlist
);
14413 add_cmd ("put", class_files
, remote_put_command
,
14414 _("Copy a local file to the remote system."),
14417 add_cmd ("get", class_files
, remote_get_command
,
14418 _("Copy a remote file to the local system."),
14421 add_cmd ("delete", class_files
, remote_delete_command
,
14422 _("Delete a remote file."),
14425 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14426 &remote_exec_file_var
, _("\
14427 Set the remote pathname for \"run\""), _("\
14428 Show the remote pathname for \"run\""), NULL
,
14429 set_remote_exec_file
,
14430 show_remote_exec_file
,
14431 &remote_set_cmdlist
,
14432 &remote_show_cmdlist
);
14434 add_setshow_boolean_cmd ("range-stepping", class_run
,
14435 &use_range_stepping
, _("\
14436 Enable or disable range stepping."), _("\
14437 Show whether target-assisted range stepping is enabled."), _("\
14438 If on, and the target supports it, when stepping a source line, GDB\n\
14439 tells the target to step the corresponding range of addresses itself instead\n\
14440 of issuing multiple single-steps. This speeds up source level\n\
14441 stepping. If off, GDB always issues single-steps, even if range\n\
14442 stepping is supported by the target. The default is on."),
14443 set_range_stepping
,
14444 show_range_stepping
,
14448 /* Eventually initialize fileio. See fileio.c */
14449 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14451 /* Take advantage of the fact that the TID field is not used, to tag
14452 special ptids with it set to != 0. */
14453 magic_null_ptid
= ptid_build (42000, -1, 1);
14454 not_sent_ptid
= ptid_build (42000, -2, 1);
14455 any_thread_ptid
= ptid_build (42000, 0, 1);