1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2021 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 "process-stratum-target.h"
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
39 #include "observable.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "gdbsupport/filestuff.h"
46 #include "gdbsupport/rsp-low.h"
50 #include "gdbsupport/gdb_sys_time.h"
52 #include "gdbsupport/event-loop.h"
53 #include "event-top.h"
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
71 #include "gdbsupport/agent.h"
73 #include "record-btrace.h"
75 #include "gdbsupport/scoped_restore.h"
76 #include "gdbsupport/environ.h"
77 #include "gdbsupport/byte-vector.h"
78 #include "gdbsupport/search.h"
80 #include <unordered_map>
81 #include "async-event.h"
83 /* The remote target. */
85 static const char remote_doc
[] = N_("\
86 Use a remote computer via a serial line, using a gdb-specific protocol.\n\
87 Specify the serial device it is connected to\n\
88 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
90 #define OPAQUETHREADBYTES 8
92 /* a 64 bit opaque identifier */
93 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
95 struct gdb_ext_thread_info
;
96 struct threads_listing_context
;
97 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
98 struct protocol_feature
;
102 typedef std::unique_ptr
<stop_reply
> stop_reply_up
;
104 /* Generic configuration support for packets the stub optionally
105 supports. Allows the user to specify the use of the packet as well
106 as allowing GDB to auto-detect support in the remote stub. */
110 PACKET_SUPPORT_UNKNOWN
= 0,
115 /* Analyze a packet's return value and update the packet config
125 struct threads_listing_context
;
127 /* Stub vCont actions support.
129 Each field is a boolean flag indicating whether the stub reports
130 support for the corresponding action. */
132 struct vCont_action_support
147 /* About this many threadids fit in a packet. */
149 #define MAXTHREADLISTRESULTS 32
151 /* Data for the vFile:pread readahead cache. */
153 struct readahead_cache
155 /* Invalidate the readahead cache. */
158 /* Invalidate the readahead cache if it is holding data for FD. */
159 void invalidate_fd (int fd
);
161 /* Serve pread from the readahead cache. Returns number of bytes
162 read, or 0 if the request can't be served from the cache. */
163 int pread (int fd
, gdb_byte
*read_buf
, size_t len
, ULONGEST offset
);
165 /* The file descriptor for the file that is being cached. -1 if the
169 /* The offset into the file that the cache buffer corresponds
173 /* The buffer holding the cache contents. */
174 gdb_byte
*buf
= nullptr;
175 /* The buffer's size. We try to read as much as fits into a packet
179 /* Cache hit and miss counters. */
180 ULONGEST hit_count
= 0;
181 ULONGEST miss_count
= 0;
184 /* Description of the remote protocol for a given architecture. */
188 long offset
; /* Offset into G packet. */
189 long regnum
; /* GDB's internal register number. */
190 LONGEST pnum
; /* Remote protocol register number. */
191 int in_g_packet
; /* Always part of G packet. */
192 /* long size in bytes; == register_size (target_gdbarch (), regnum);
194 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
198 struct remote_arch_state
200 explicit remote_arch_state (struct gdbarch
*gdbarch
);
202 /* Description of the remote protocol registers. */
203 long sizeof_g_packet
;
205 /* Description of the remote protocol registers indexed by REGNUM
206 (making an array gdbarch_num_regs in size). */
207 std::unique_ptr
<packet_reg
[]> regs
;
209 /* This is the size (in chars) of the first response to the ``g''
210 packet. It is used as a heuristic when determining the maximum
211 size of memory-read and memory-write packets. A target will
212 typically only reserve a buffer large enough to hold the ``g''
213 packet. The size does not include packet overhead (headers and
215 long actual_register_packet_size
;
217 /* This is the maximum size (in chars) of a non read/write packet.
218 It is also used as a cap on the size of read/write packets. */
219 long remote_packet_size
;
222 /* Description of the remote protocol state for the currently
223 connected target. This is per-target state, and independent of the
224 selected architecture. */
233 /* Get the remote arch state for GDBARCH. */
234 struct remote_arch_state
*get_remote_arch_state (struct gdbarch
*gdbarch
);
238 /* A buffer to use for incoming packets, and its current size. The
239 buffer is grown dynamically for larger incoming packets.
240 Outgoing packets may also be constructed in this buffer.
241 The size of the buffer is always at least REMOTE_PACKET_SIZE;
242 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
244 gdb::char_vector buf
;
246 /* True if we're going through initial connection setup (finding out
247 about the remote side's threads, relocating symbols, etc.). */
248 bool starting_up
= false;
250 /* If we negotiated packet size explicitly (and thus can bypass
251 heuristics for the largest packet size that will not overflow
252 a buffer in the stub), this will be set to that packet size.
253 Otherwise zero, meaning to use the guessed size. */
254 long explicit_packet_size
= 0;
256 /* remote_wait is normally called when the target is running and
257 waits for a stop reply packet. But sometimes we need to call it
258 when the target is already stopped. We can send a "?" packet
259 and have remote_wait read the response. Or, if we already have
260 the response, we can stash it in BUF and tell remote_wait to
261 skip calling getpkt. This flag is set when BUF contains a
262 stop reply packet and the target is not waiting. */
263 int cached_wait_status
= 0;
265 /* True, if in no ack mode. That is, neither GDB nor the stub will
266 expect acks from each other. The connection is assumed to be
268 bool noack_mode
= false;
270 /* True if we're connected in extended remote mode. */
271 bool extended
= false;
273 /* True if we resumed the target and we're waiting for the target to
274 stop. In the mean time, we can't start another command/query.
275 The remote server wouldn't be ready to process it, so we'd
276 timeout waiting for a reply that would never come and eventually
277 we'd close the connection. This can happen in asynchronous mode
278 because we allow GDB commands while the target is running. */
279 bool waiting_for_stop_reply
= false;
281 /* The status of the stub support for the various vCont actions. */
282 vCont_action_support supports_vCont
;
283 /* Whether vCont support was probed already. This is a workaround
284 until packet_support is per-connection. */
285 bool supports_vCont_probed
;
287 /* True if the user has pressed Ctrl-C, but the target hasn't
288 responded to that. */
289 bool ctrlc_pending_p
= false;
291 /* True if we saw a Ctrl-C while reading or writing from/to the
292 remote descriptor. At that point it is not safe to send a remote
293 interrupt packet, so we instead remember we saw the Ctrl-C and
294 process it once we're done with sending/receiving the current
295 packet, which should be shortly. If however that takes too long,
296 and the user presses Ctrl-C again, we offer to disconnect. */
297 bool got_ctrlc_during_io
= false;
299 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
300 remote_open knows that we don't have a file open when the program
302 struct serial
*remote_desc
= nullptr;
304 /* These are the threads which we last sent to the remote system. The
305 TID member will be -1 for all or -2 for not sent yet. */
306 ptid_t general_thread
= null_ptid
;
307 ptid_t continue_thread
= null_ptid
;
309 /* This is the traceframe which we last selected on the remote system.
310 It will be -1 if no traceframe is selected. */
311 int remote_traceframe_number
= -1;
313 char *last_pass_packet
= nullptr;
315 /* The last QProgramSignals packet sent to the target. We bypass
316 sending a new program signals list down to the target if the new
317 packet is exactly the same as the last we sent. IOW, we only let
318 the target know about program signals list changes. */
319 char *last_program_signals_packet
= nullptr;
321 gdb_signal last_sent_signal
= GDB_SIGNAL_0
;
323 bool last_sent_step
= false;
325 /* The execution direction of the last resume we got. */
326 exec_direction_kind last_resume_exec_dir
= EXEC_FORWARD
;
328 char *finished_object
= nullptr;
329 char *finished_annex
= nullptr;
330 ULONGEST finished_offset
= 0;
332 /* Should we try the 'ThreadInfo' query packet?
334 This variable (NOT available to the user: auto-detect only!)
335 determines whether GDB will use the new, simpler "ThreadInfo"
336 query or the older, more complex syntax for thread queries.
337 This is an auto-detect variable (set to true at each connect,
338 and set to false when the target fails to recognize it). */
339 bool use_threadinfo_query
= false;
340 bool use_threadextra_query
= false;
342 threadref echo_nextthread
{};
343 threadref nextthread
{};
344 threadref resultthreadlist
[MAXTHREADLISTRESULTS
] {};
346 /* The state of remote notification. */
347 struct remote_notif_state
*notif_state
= nullptr;
349 /* The branch trace configuration. */
350 struct btrace_config btrace_config
{};
352 /* The argument to the last "vFile:setfs:" packet we sent, used
353 to avoid sending repeated unnecessary "vFile:setfs:" packets.
354 Initialized to -1 to indicate that no "vFile:setfs:" packet
355 has yet been sent. */
358 /* A readahead cache for vFile:pread. Often, reading a binary
359 involves a sequence of small reads. E.g., when parsing an ELF
360 file. A readahead cache helps mostly the case of remote
361 debugging on a connection with higher latency, due to the
362 request/reply nature of the RSP. We only cache data for a single
363 file descriptor at a time. */
364 struct readahead_cache readahead_cache
;
366 /* The list of already fetched and acknowledged stop events. This
367 queue is used for notification Stop, and other notifications
368 don't need queue for their events, because the notification
369 events of Stop can't be consumed immediately, so that events
370 should be queued first, and be consumed by remote_wait_{ns,as}
371 one per time. Other notifications can consume their events
372 immediately, so queue is not needed for them. */
373 std::vector
<stop_reply_up
> stop_reply_queue
;
375 /* Asynchronous signal handle registered as event loop source for
376 when we have pending events ready to be passed to the core. */
377 struct async_event_handler
*remote_async_inferior_event_token
= nullptr;
379 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
380 ``forever'' still use the normal timeout mechanism. This is
381 currently used by the ASYNC code to guarentee that target reads
382 during the initial connect always time-out. Once getpkt has been
383 modified to return a timeout indication and, in turn
384 remote_wait()/wait_for_inferior() have gained a timeout parameter
386 int wait_forever_enabled_p
= 1;
389 /* Mapping of remote protocol data for each gdbarch. Usually there
390 is only one entry here, though we may see more with stubs that
391 support multi-process. */
392 std::unordered_map
<struct gdbarch
*, remote_arch_state
>
396 static const target_info remote_target_info
= {
398 N_("Remote serial target in gdb-specific protocol"),
402 class remote_target
: public process_stratum_target
405 remote_target () = default;
406 ~remote_target () override
;
408 const target_info
&info () const override
409 { return remote_target_info
; }
411 const char *connection_string () override
;
413 thread_control_capabilities
get_thread_control_capabilities () override
414 { return tc_schedlock
; }
416 /* Open a remote connection. */
417 static void open (const char *, int);
419 void close () override
;
421 void detach (inferior
*, int) override
;
422 void disconnect (const char *, int) override
;
424 void commit_resume () override
;
425 void resume (ptid_t
, int, enum gdb_signal
) override
;
426 ptid_t
wait (ptid_t
, struct target_waitstatus
*, target_wait_flags
) override
;
428 void fetch_registers (struct regcache
*, int) override
;
429 void store_registers (struct regcache
*, int) override
;
430 void prepare_to_store (struct regcache
*) override
;
432 void files_info () override
;
434 int insert_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
436 int remove_breakpoint (struct gdbarch
*, struct bp_target_info
*,
437 enum remove_bp_reason
) override
;
440 bool stopped_by_sw_breakpoint () override
;
441 bool supports_stopped_by_sw_breakpoint () override
;
443 bool stopped_by_hw_breakpoint () override
;
445 bool supports_stopped_by_hw_breakpoint () override
;
447 bool stopped_by_watchpoint () override
;
449 bool stopped_data_address (CORE_ADDR
*) override
;
451 bool watchpoint_addr_within_range (CORE_ADDR
, CORE_ADDR
, int) override
;
453 int can_use_hw_breakpoint (enum bptype
, int, int) override
;
455 int insert_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
457 int remove_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
459 int region_ok_for_hw_watchpoint (CORE_ADDR
, int) override
;
461 int insert_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
462 struct expression
*) override
;
464 int remove_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
465 struct expression
*) override
;
467 void kill () override
;
469 void load (const char *, int) override
;
471 void mourn_inferior () override
;
473 void pass_signals (gdb::array_view
<const unsigned char>) override
;
475 int set_syscall_catchpoint (int, bool, int,
476 gdb::array_view
<const int>) override
;
478 void program_signals (gdb::array_view
<const unsigned char>) override
;
480 bool thread_alive (ptid_t ptid
) override
;
482 const char *thread_name (struct thread_info
*) override
;
484 void update_thread_list () override
;
486 std::string
pid_to_str (ptid_t
) override
;
488 const char *extra_thread_info (struct thread_info
*) override
;
490 ptid_t
get_ada_task_ptid (long lwp
, long thread
) override
;
492 thread_info
*thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
494 inferior
*inf
) override
;
496 gdb::byte_vector
thread_info_to_thread_handle (struct thread_info
*tp
)
499 void stop (ptid_t
) override
;
501 void interrupt () override
;
503 void pass_ctrlc () override
;
505 enum target_xfer_status
xfer_partial (enum target_object object
,
508 const gdb_byte
*writebuf
,
509 ULONGEST offset
, ULONGEST len
,
510 ULONGEST
*xfered_len
) override
;
512 ULONGEST
get_memory_xfer_limit () override
;
514 void rcmd (const char *command
, struct ui_file
*output
) override
;
516 char *pid_to_exec_file (int pid
) override
;
518 void log_command (const char *cmd
) override
520 serial_log_command (this, cmd
);
523 CORE_ADDR
get_thread_local_address (ptid_t ptid
,
524 CORE_ADDR load_module_addr
,
525 CORE_ADDR offset
) override
;
527 bool can_execute_reverse () override
;
529 std::vector
<mem_region
> memory_map () override
;
531 void flash_erase (ULONGEST address
, LONGEST length
) override
;
533 void flash_done () override
;
535 const struct target_desc
*read_description () override
;
537 int search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
538 const gdb_byte
*pattern
, ULONGEST pattern_len
,
539 CORE_ADDR
*found_addrp
) override
;
541 bool can_async_p () override
;
543 bool is_async_p () override
;
545 void async (int) override
;
547 int async_wait_fd () override
;
549 void thread_events (int) override
;
551 int can_do_single_step () override
;
553 void terminal_inferior () override
;
555 void terminal_ours () override
;
557 bool supports_non_stop () override
;
559 bool supports_multi_process () override
;
561 bool supports_disable_randomization () override
;
563 bool filesystem_is_local () override
;
566 int fileio_open (struct inferior
*inf
, const char *filename
,
567 int flags
, int mode
, int warn_if_slow
,
568 int *target_errno
) override
;
570 int fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
571 ULONGEST offset
, int *target_errno
) override
;
573 int fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
574 ULONGEST offset
, int *target_errno
) override
;
576 int fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
) override
;
578 int fileio_close (int fd
, int *target_errno
) override
;
580 int fileio_unlink (struct inferior
*inf
,
581 const char *filename
,
582 int *target_errno
) override
;
584 gdb::optional
<std::string
>
585 fileio_readlink (struct inferior
*inf
,
586 const char *filename
,
587 int *target_errno
) override
;
589 bool supports_enable_disable_tracepoint () override
;
591 bool supports_string_tracing () override
;
593 bool supports_evaluation_of_breakpoint_conditions () override
;
595 bool can_run_breakpoint_commands () override
;
597 void trace_init () override
;
599 void download_tracepoint (struct bp_location
*location
) override
;
601 bool can_download_tracepoint () override
;
603 void download_trace_state_variable (const trace_state_variable
&tsv
) override
;
605 void enable_tracepoint (struct bp_location
*location
) override
;
607 void disable_tracepoint (struct bp_location
*location
) override
;
609 void trace_set_readonly_regions () override
;
611 void trace_start () override
;
613 int get_trace_status (struct trace_status
*ts
) override
;
615 void get_tracepoint_status (struct breakpoint
*tp
, struct uploaded_tp
*utp
)
618 void trace_stop () override
;
620 int trace_find (enum trace_find_type type
, int num
,
621 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
) override
;
623 bool get_trace_state_variable_value (int tsv
, LONGEST
*val
) override
;
625 int save_trace_data (const char *filename
) override
;
627 int upload_tracepoints (struct uploaded_tp
**utpp
) override
;
629 int upload_trace_state_variables (struct uploaded_tsv
**utsvp
) override
;
631 LONGEST
get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
) override
;
633 int get_min_fast_tracepoint_insn_len () override
;
635 void set_disconnected_tracing (int val
) override
;
637 void set_circular_trace_buffer (int val
) override
;
639 void set_trace_buffer_size (LONGEST val
) override
;
641 bool set_trace_notes (const char *user
, const char *notes
,
642 const char *stopnotes
) override
;
644 int core_of_thread (ptid_t ptid
) override
;
646 int verify_memory (const gdb_byte
*data
,
647 CORE_ADDR memaddr
, ULONGEST size
) override
;
650 bool get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
) override
;
652 void set_permissions () override
;
654 bool static_tracepoint_marker_at (CORE_ADDR
,
655 struct static_tracepoint_marker
*marker
)
658 std::vector
<static_tracepoint_marker
>
659 static_tracepoint_markers_by_strid (const char *id
) override
;
661 traceframe_info_up
traceframe_info () override
;
663 bool use_agent (bool use
) override
;
664 bool can_use_agent () override
;
666 struct btrace_target_info
*enable_btrace (ptid_t ptid
,
667 const struct btrace_config
*conf
) override
;
669 void disable_btrace (struct btrace_target_info
*tinfo
) override
;
671 void teardown_btrace (struct btrace_target_info
*tinfo
) override
;
673 enum btrace_error
read_btrace (struct btrace_data
*data
,
674 struct btrace_target_info
*btinfo
,
675 enum btrace_read_type type
) override
;
677 const struct btrace_config
*btrace_conf (const struct btrace_target_info
*) override
;
678 bool augmented_libraries_svr4_read () override
;
679 bool follow_fork (bool, bool) override
;
680 void follow_exec (struct inferior
*, const char *) override
;
681 int insert_fork_catchpoint (int) override
;
682 int remove_fork_catchpoint (int) override
;
683 int insert_vfork_catchpoint (int) override
;
684 int remove_vfork_catchpoint (int) override
;
685 int insert_exec_catchpoint (int) override
;
686 int remove_exec_catchpoint (int) override
;
687 enum exec_direction_kind
execution_direction () override
;
689 public: /* Remote specific methods. */
691 void remote_download_command_source (int num
, ULONGEST addr
,
692 struct command_line
*cmds
);
694 void remote_file_put (const char *local_file
, const char *remote_file
,
696 void remote_file_get (const char *remote_file
, const char *local_file
,
698 void remote_file_delete (const char *remote_file
, int from_tty
);
700 int remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
701 ULONGEST offset
, int *remote_errno
);
702 int remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
703 ULONGEST offset
, int *remote_errno
);
704 int remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
705 ULONGEST offset
, int *remote_errno
);
707 int remote_hostio_send_command (int command_bytes
, int which_packet
,
708 int *remote_errno
, const char **attachment
,
709 int *attachment_len
);
710 int remote_hostio_set_filesystem (struct inferior
*inf
,
712 /* We should get rid of this and use fileio_open directly. */
713 int remote_hostio_open (struct inferior
*inf
, const char *filename
,
714 int flags
, int mode
, int warn_if_slow
,
716 int remote_hostio_close (int fd
, int *remote_errno
);
718 int remote_hostio_unlink (inferior
*inf
, const char *filename
,
721 struct remote_state
*get_remote_state ();
723 long get_remote_packet_size (void);
724 long get_memory_packet_size (struct memory_packet_config
*config
);
726 long get_memory_write_packet_size ();
727 long get_memory_read_packet_size ();
729 char *append_pending_thread_resumptions (char *p
, char *endp
,
731 static void open_1 (const char *name
, int from_tty
, int extended_p
);
732 void start_remote (int from_tty
, int extended_p
);
733 void remote_detach_1 (struct inferior
*inf
, int from_tty
);
735 char *append_resumption (char *p
, char *endp
,
736 ptid_t ptid
, int step
, gdb_signal siggnal
);
737 int remote_resume_with_vcont (ptid_t ptid
, int step
,
740 void add_current_inferior_and_thread (const char *wait_status
);
742 ptid_t
wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
743 target_wait_flags options
);
744 ptid_t
wait_as (ptid_t ptid
, target_waitstatus
*status
,
745 target_wait_flags options
);
747 ptid_t
process_stop_reply (struct stop_reply
*stop_reply
,
748 target_waitstatus
*status
);
750 ptid_t select_thread_for_ambiguous_stop_reply
751 (const struct target_waitstatus
*status
);
753 void remote_notice_new_inferior (ptid_t currthread
, int executing
);
755 void process_initial_stop_replies (int from_tty
);
757 thread_info
*remote_add_thread (ptid_t ptid
, bool running
, bool executing
);
759 void btrace_sync_conf (const btrace_config
*conf
);
761 void remote_btrace_maybe_reopen ();
763 void remove_new_fork_children (threads_listing_context
*context
);
764 void kill_new_fork_children (int pid
);
765 void discard_pending_stop_replies (struct inferior
*inf
);
766 int stop_reply_queue_length ();
768 void check_pending_events_prevent_wildcard_vcont
769 (int *may_global_wildcard_vcont
);
771 void discard_pending_stop_replies_in_queue ();
772 struct stop_reply
*remote_notif_remove_queued_reply (ptid_t ptid
);
773 struct stop_reply
*queued_stop_reply (ptid_t ptid
);
774 int peek_stop_reply (ptid_t ptid
);
775 void remote_parse_stop_reply (const char *buf
, stop_reply
*event
);
777 void remote_stop_ns (ptid_t ptid
);
778 void remote_interrupt_as ();
779 void remote_interrupt_ns ();
781 char *remote_get_noisy_reply ();
782 int remote_query_attached (int pid
);
783 inferior
*remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
786 ptid_t
remote_current_thread (ptid_t oldpid
);
787 ptid_t
get_current_thread (const char *wait_status
);
789 void set_thread (ptid_t ptid
, int gen
);
790 void set_general_thread (ptid_t ptid
);
791 void set_continue_thread (ptid_t ptid
);
792 void set_general_process ();
794 char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
796 int remote_unpack_thread_info_response (const char *pkt
, threadref
*expectedref
,
797 gdb_ext_thread_info
*info
);
798 int remote_get_threadinfo (threadref
*threadid
, int fieldset
,
799 gdb_ext_thread_info
*info
);
801 int parse_threadlist_response (const char *pkt
, int result_limit
,
802 threadref
*original_echo
,
803 threadref
*resultlist
,
805 int remote_get_threadlist (int startflag
, threadref
*nextthread
,
806 int result_limit
, int *done
, int *result_count
,
807 threadref
*threadlist
);
809 int remote_threadlist_iterator (rmt_thread_action stepfunction
,
810 void *context
, int looplimit
);
812 int remote_get_threads_with_ql (threads_listing_context
*context
);
813 int remote_get_threads_with_qxfer (threads_listing_context
*context
);
814 int remote_get_threads_with_qthreadinfo (threads_listing_context
*context
);
816 void extended_remote_restart ();
820 void remote_check_symbols ();
822 void remote_supported_packet (const struct protocol_feature
*feature
,
823 enum packet_support support
,
824 const char *argument
);
826 void remote_query_supported ();
828 void remote_packet_size (const protocol_feature
*feature
,
829 packet_support support
, const char *value
);
831 void remote_serial_quit_handler ();
833 void remote_detach_pid (int pid
);
835 void remote_vcont_probe ();
837 void remote_resume_with_hc (ptid_t ptid
, int step
,
840 void send_interrupt_sequence ();
841 void interrupt_query ();
843 void remote_notif_get_pending_events (notif_client
*nc
);
845 int fetch_register_using_p (struct regcache
*regcache
,
847 int send_g_packet ();
848 void process_g_packet (struct regcache
*regcache
);
849 void fetch_registers_using_g (struct regcache
*regcache
);
850 int store_register_using_P (const struct regcache
*regcache
,
852 void store_registers_using_G (const struct regcache
*regcache
);
854 void set_remote_traceframe ();
856 void check_binary_download (CORE_ADDR addr
);
858 target_xfer_status
remote_write_bytes_aux (const char *header
,
860 const gdb_byte
*myaddr
,
863 ULONGEST
*xfered_len_units
,
867 target_xfer_status
remote_write_bytes (CORE_ADDR memaddr
,
868 const gdb_byte
*myaddr
, ULONGEST len
,
869 int unit_size
, ULONGEST
*xfered_len
);
871 target_xfer_status
remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
873 int unit_size
, ULONGEST
*xfered_len_units
);
875 target_xfer_status
remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
879 ULONGEST
*xfered_len
);
881 target_xfer_status
remote_read_bytes (CORE_ADDR memaddr
,
882 gdb_byte
*myaddr
, ULONGEST len
,
884 ULONGEST
*xfered_len
);
886 packet_result
remote_send_printf (const char *format
, ...)
887 ATTRIBUTE_PRINTF (2, 3);
889 target_xfer_status
remote_flash_write (ULONGEST address
,
890 ULONGEST length
, ULONGEST
*xfered_len
,
891 const gdb_byte
*data
);
893 int readchar (int timeout
);
895 void remote_serial_write (const char *str
, int len
);
897 int putpkt (const char *buf
);
898 int putpkt_binary (const char *buf
, int cnt
);
900 int putpkt (const gdb::char_vector
&buf
)
902 return putpkt (buf
.data ());
906 long read_frame (gdb::char_vector
*buf_p
);
907 void getpkt (gdb::char_vector
*buf
, int forever
);
908 int getpkt_or_notif_sane_1 (gdb::char_vector
*buf
, int forever
,
909 int expecting_notif
, int *is_notif
);
910 int getpkt_sane (gdb::char_vector
*buf
, int forever
);
911 int getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
913 int remote_vkill (int pid
);
914 void remote_kill_k ();
916 void extended_remote_disable_randomization (int val
);
917 int extended_remote_run (const std::string
&args
);
919 void send_environment_packet (const char *action
,
923 void extended_remote_environment_support ();
924 void extended_remote_set_inferior_cwd ();
926 target_xfer_status
remote_write_qxfer (const char *object_name
,
928 const gdb_byte
*writebuf
,
929 ULONGEST offset
, LONGEST len
,
930 ULONGEST
*xfered_len
,
931 struct packet_config
*packet
);
933 target_xfer_status
remote_read_qxfer (const char *object_name
,
935 gdb_byte
*readbuf
, ULONGEST offset
,
937 ULONGEST
*xfered_len
,
938 struct packet_config
*packet
);
940 void push_stop_reply (struct stop_reply
*new_event
);
942 bool vcont_r_supported ();
944 void packet_command (const char *args
, int from_tty
);
946 private: /* data fields */
948 /* The remote state. Don't reference this directly. Use the
949 get_remote_state method instead. */
950 remote_state m_remote_state
;
953 static const target_info extended_remote_target_info
= {
955 N_("Extended remote serial target in gdb-specific protocol"),
959 /* Set up the extended remote target by extending the standard remote
960 target and adding to it. */
962 class extended_remote_target final
: public remote_target
965 const target_info
&info () const override
966 { return extended_remote_target_info
; }
968 /* Open an extended-remote connection. */
969 static void open (const char *, int);
971 bool can_create_inferior () override
{ return true; }
972 void create_inferior (const char *, const std::string
&,
973 char **, int) override
;
975 void detach (inferior
*, int) override
;
977 bool can_attach () override
{ return true; }
978 void attach (const char *, int) override
;
980 void post_attach (int) override
;
981 bool supports_disable_randomization () override
;
984 /* Per-program-space data key. */
985 static const struct program_space_key
<char, gdb::xfree_deleter
<char>>
988 /* The variable registered as the control variable used by the
989 remote exec-file commands. While the remote exec-file setting is
990 per-program-space, the set/show machinery uses this as the
991 location of the remote exec-file value. */
992 static char *remote_exec_file_var
;
994 /* The size to align memory write packets, when practical. The protocol
995 does not guarantee any alignment, and gdb will generate short
996 writes and unaligned writes, but even as a best-effort attempt this
997 can improve bulk transfers. For instance, if a write is misaligned
998 relative to the target's data bus, the stub may need to make an extra
999 round trip fetching data from the target. This doesn't make a
1000 huge difference, but it's easy to do, so we try to be helpful.
1002 The alignment chosen is arbitrary; usually data bus width is
1003 important here, not the possibly larger cache line size. */
1004 enum { REMOTE_ALIGN_WRITES
= 16 };
1006 /* Prototypes for local functions. */
1008 static int hexnumlen (ULONGEST num
);
1010 static int stubhex (int ch
);
1012 static int hexnumstr (char *, ULONGEST
);
1014 static int hexnumnstr (char *, ULONGEST
, int);
1016 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
1018 static void print_packet (const char *);
1020 static int stub_unpack_int (const char *buff
, int fieldlength
);
1022 struct packet_config
;
1024 static void show_packet_config_cmd (struct packet_config
*config
);
1026 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
1028 struct cmd_list_element
*c
,
1031 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
1033 static void remote_async_inferior_event_handler (gdb_client_data
);
1035 static bool remote_read_description_p (struct target_ops
*target
);
1037 static void remote_console_output (const char *msg
);
1039 static void remote_btrace_reset (remote_state
*rs
);
1041 static void remote_unpush_and_throw (remote_target
*target
);
1045 static struct cmd_list_element
*remote_cmdlist
;
1047 /* For "set remote" and "show remote". */
1049 static struct cmd_list_element
*remote_set_cmdlist
;
1050 static struct cmd_list_element
*remote_show_cmdlist
;
1052 /* Controls whether GDB is willing to use range stepping. */
1054 static bool use_range_stepping
= true;
1056 /* From the remote target's point of view, each thread is in one of these three
1058 enum class resume_state
1060 /* Not resumed - we haven't been asked to resume this thread. */
1063 /* We have been asked to resume this thread, but haven't sent a vCont action
1064 for it yet. We'll need to consider it next time commit_resume is
1066 RESUMED_PENDING_VCONT
,
1068 /* We have been asked to resume this thread, and we have sent a vCont action
1073 /* Information about a thread's pending vCont-resume. Used when a thread is in
1074 the remote_resume_state::RESUMED_PENDING_VCONT state. remote_target::resume
1075 stores this information which is then picked up by
1076 remote_target::commit_resume to know which is the proper action for this
1077 thread to include in the vCont packet. */
1078 struct resumed_pending_vcont_info
1080 /* True if the last resume call for this thread was a step request, false
1081 if a continue request. */
1084 /* The signal specified in the last resume call for this thread. */
1088 /* Private data that we'll store in (struct thread_info)->priv. */
1089 struct remote_thread_info
: public private_thread_info
1095 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1096 sequence of bytes. */
1097 gdb::byte_vector thread_handle
;
1099 /* Whether the target stopped for a breakpoint/watchpoint. */
1100 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1102 /* This is set to the data address of the access causing the target
1103 to stop for a watchpoint. */
1104 CORE_ADDR watch_data_address
= 0;
1106 /* Get the thread's resume state. */
1107 enum resume_state
resume_state () const
1109 return m_resume_state
;
1112 /* Put the thread in the NOT_RESUMED state. */
1113 void set_not_resumed ()
1115 m_resume_state
= resume_state::NOT_RESUMED
;
1118 /* Put the thread in the RESUMED_PENDING_VCONT state. */
1119 void set_resumed_pending_vcont (bool step
, gdb_signal sig
)
1121 m_resume_state
= resume_state::RESUMED_PENDING_VCONT
;
1122 m_resumed_pending_vcont_info
.step
= step
;
1123 m_resumed_pending_vcont_info
.sig
= sig
;
1126 /* Get the information this thread's pending vCont-resumption.
1128 Must only be called if the thread is in the RESUMED_PENDING_VCONT resume
1130 const struct resumed_pending_vcont_info
&resumed_pending_vcont_info () const
1132 gdb_assert (m_resume_state
== resume_state::RESUMED_PENDING_VCONT
);
1134 return m_resumed_pending_vcont_info
;
1137 /* Put the thread in the VCONT_RESUMED state. */
1140 m_resume_state
= resume_state::RESUMED
;
1144 /* Resume state for this thread. This is used to implement vCont action
1145 coalescing (only when the target operates in non-stop mode).
1147 remote_target::resume moves the thread to the RESUMED_PENDING_VCONT state,
1148 which notes that this thread must be considered in the next commit_resume
1151 remote_target::commit_resume sends a vCont packet with actions for the
1152 threads in the RESUMED_PENDING_VCONT state and moves them to the
1153 VCONT_RESUMED state.
1155 When reporting a stop to the core for a thread, that thread is moved back
1156 to the NOT_RESUMED state. */
1157 enum resume_state m_resume_state
= resume_state::NOT_RESUMED
;
1159 /* Extra info used if the thread is in the RESUMED_PENDING_VCONT state. */
1160 struct resumed_pending_vcont_info m_resumed_pending_vcont_info
;
1163 remote_state::remote_state ()
1168 remote_state::~remote_state ()
1170 xfree (this->last_pass_packet
);
1171 xfree (this->last_program_signals_packet
);
1172 xfree (this->finished_object
);
1173 xfree (this->finished_annex
);
1176 /* Utility: generate error from an incoming stub packet. */
1178 trace_error (char *buf
)
1181 return; /* not an error msg */
1184 case '1': /* malformed packet error */
1185 if (*++buf
== '0') /* general case: */
1186 error (_("remote.c: error in outgoing packet."));
1188 error (_("remote.c: error in outgoing packet at field #%ld."),
1189 strtol (buf
, NULL
, 16));
1191 error (_("Target returns error code '%s'."), buf
);
1195 /* Utility: wait for reply from stub, while accepting "O" packets. */
1198 remote_target::remote_get_noisy_reply ()
1200 struct remote_state
*rs
= get_remote_state ();
1202 do /* Loop on reply from remote stub. */
1206 QUIT
; /* Allow user to bail out with ^C. */
1207 getpkt (&rs
->buf
, 0);
1208 buf
= rs
->buf
.data ();
1211 else if (startswith (buf
, "qRelocInsn:"))
1214 CORE_ADDR from
, to
, org_to
;
1216 int adjusted_size
= 0;
1219 p
= buf
+ strlen ("qRelocInsn:");
1220 pp
= unpack_varlen_hex (p
, &ul
);
1222 error (_("invalid qRelocInsn packet: %s"), buf
);
1226 unpack_varlen_hex (p
, &ul
);
1233 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
1236 catch (const gdb_exception
&ex
)
1238 if (ex
.error
== MEMORY_ERROR
)
1240 /* Propagate memory errors silently back to the
1241 target. The stub may have limited the range of
1242 addresses we can write to, for example. */
1246 /* Something unexpectedly bad happened. Be verbose
1247 so we can tell what, and propagate the error back
1248 to the stub, so it doesn't get stuck waiting for
1250 exception_fprintf (gdb_stderr
, ex
,
1251 _("warning: relocating instruction: "));
1258 adjusted_size
= to
- org_to
;
1260 xsnprintf (buf
, rs
->buf
.size (), "qRelocInsn:%x", adjusted_size
);
1264 else if (buf
[0] == 'O' && buf
[1] != 'K')
1265 remote_console_output (buf
+ 1); /* 'O' message from stub */
1267 return buf
; /* Here's the actual reply. */
1272 struct remote_arch_state
*
1273 remote_state::get_remote_arch_state (struct gdbarch
*gdbarch
)
1275 remote_arch_state
*rsa
;
1277 auto it
= this->m_arch_states
.find (gdbarch
);
1278 if (it
== this->m_arch_states
.end ())
1280 auto p
= this->m_arch_states
.emplace (std::piecewise_construct
,
1281 std::forward_as_tuple (gdbarch
),
1282 std::forward_as_tuple (gdbarch
));
1283 rsa
= &p
.first
->second
;
1285 /* Make sure that the packet buffer is plenty big enough for
1286 this architecture. */
1287 if (this->buf
.size () < rsa
->remote_packet_size
)
1288 this->buf
.resize (2 * rsa
->remote_packet_size
);
1296 /* Fetch the global remote target state. */
1299 remote_target::get_remote_state ()
1301 /* Make sure that the remote architecture state has been
1302 initialized, because doing so might reallocate rs->buf. Any
1303 function which calls getpkt also needs to be mindful of changes
1304 to rs->buf, but this call limits the number of places which run
1306 m_remote_state
.get_remote_arch_state (target_gdbarch ());
1308 return &m_remote_state
;
1311 /* Fetch the remote exec-file from the current program space. */
1314 get_remote_exec_file (void)
1316 char *remote_exec_file
;
1318 remote_exec_file
= remote_pspace_data
.get (current_program_space
);
1319 if (remote_exec_file
== NULL
)
1322 return remote_exec_file
;
1325 /* Set the remote exec file for PSPACE. */
1328 set_pspace_remote_exec_file (struct program_space
*pspace
,
1329 const char *remote_exec_file
)
1331 char *old_file
= remote_pspace_data
.get (pspace
);
1334 remote_pspace_data
.set (pspace
, xstrdup (remote_exec_file
));
1337 /* The "set/show remote exec-file" set command hook. */
1340 set_remote_exec_file (const char *ignored
, int from_tty
,
1341 struct cmd_list_element
*c
)
1343 gdb_assert (remote_exec_file_var
!= NULL
);
1344 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
1347 /* The "set/show remote exec-file" show command hook. */
1350 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
1351 struct cmd_list_element
*cmd
, const char *value
)
1353 fprintf_filtered (file
, "%s\n", get_remote_exec_file ());
1357 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
1359 int regnum
, num_remote_regs
, offset
;
1360 struct packet_reg
**remote_regs
;
1362 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
1364 struct packet_reg
*r
= ®s
[regnum
];
1366 if (register_size (gdbarch
, regnum
) == 0)
1367 /* Do not try to fetch zero-sized (placeholder) registers. */
1370 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
1375 /* Define the g/G packet format as the contents of each register
1376 with a remote protocol number, in order of ascending protocol
1379 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
1380 for (num_remote_regs
= 0, regnum
= 0;
1381 regnum
< gdbarch_num_regs (gdbarch
);
1383 if (regs
[regnum
].pnum
!= -1)
1384 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
1386 std::sort (remote_regs
, remote_regs
+ num_remote_regs
,
1387 [] (const packet_reg
*a
, const packet_reg
*b
)
1388 { return a
->pnum
< b
->pnum
; });
1390 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
1392 remote_regs
[regnum
]->in_g_packet
= 1;
1393 remote_regs
[regnum
]->offset
= offset
;
1394 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
1400 /* Given the architecture described by GDBARCH, return the remote
1401 protocol register's number and the register's offset in the g/G
1402 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1403 If the target does not have a mapping for REGNUM, return false,
1404 otherwise, return true. */
1407 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
1408 int *pnum
, int *poffset
)
1410 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
1412 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
1414 map_regcache_remote_table (gdbarch
, regs
.data ());
1416 *pnum
= regs
[regnum
].pnum
;
1417 *poffset
= regs
[regnum
].offset
;
1422 remote_arch_state::remote_arch_state (struct gdbarch
*gdbarch
)
1424 /* Use the architecture to build a regnum<->pnum table, which will be
1425 1:1 unless a feature set specifies otherwise. */
1426 this->regs
.reset (new packet_reg
[gdbarch_num_regs (gdbarch
)] ());
1428 /* Record the maximum possible size of the g packet - it may turn out
1430 this->sizeof_g_packet
1431 = map_regcache_remote_table (gdbarch
, this->regs
.get ());
1433 /* Default maximum number of characters in a packet body. Many
1434 remote stubs have a hardwired buffer size of 400 bytes
1435 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1436 as the maximum packet-size to ensure that the packet and an extra
1437 NUL character can always fit in the buffer. This stops GDB
1438 trashing stubs that try to squeeze an extra NUL into what is
1439 already a full buffer (As of 1999-12-04 that was most stubs). */
1440 this->remote_packet_size
= 400 - 1;
1442 /* This one is filled in when a ``g'' packet is received. */
1443 this->actual_register_packet_size
= 0;
1445 /* Should rsa->sizeof_g_packet needs more space than the
1446 default, adjust the size accordingly. Remember that each byte is
1447 encoded as two characters. 32 is the overhead for the packet
1448 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1449 (``$NN:G...#NN'') is a better guess, the below has been padded a
1451 if (this->sizeof_g_packet
> ((this->remote_packet_size
- 32) / 2))
1452 this->remote_packet_size
= (this->sizeof_g_packet
* 2 + 32);
1455 /* Get a pointer to the current remote target. If not connected to a
1456 remote target, return NULL. */
1458 static remote_target
*
1459 get_current_remote_target ()
1461 target_ops
*proc_target
= current_inferior ()->process_target ();
1462 return dynamic_cast<remote_target
*> (proc_target
);
1465 /* Return the current allowed size of a remote packet. This is
1466 inferred from the current architecture, and should be used to
1467 limit the length of outgoing packets. */
1469 remote_target::get_remote_packet_size ()
1471 struct remote_state
*rs
= get_remote_state ();
1472 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1474 if (rs
->explicit_packet_size
)
1475 return rs
->explicit_packet_size
;
1477 return rsa
->remote_packet_size
;
1480 static struct packet_reg
*
1481 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1484 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
1488 struct packet_reg
*r
= &rsa
->regs
[regnum
];
1490 gdb_assert (r
->regnum
== regnum
);
1495 static struct packet_reg
*
1496 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1501 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
1503 struct packet_reg
*r
= &rsa
->regs
[i
];
1505 if (r
->pnum
== pnum
)
1511 /* Allow the user to specify what sequence to send to the remote
1512 when he requests a program interruption: Although ^C is usually
1513 what remote systems expect (this is the default, here), it is
1514 sometimes preferable to send a break. On other systems such
1515 as the Linux kernel, a break followed by g, which is Magic SysRq g
1516 is required in order to interrupt the execution. */
1517 const char interrupt_sequence_control_c
[] = "Ctrl-C";
1518 const char interrupt_sequence_break
[] = "BREAK";
1519 const char interrupt_sequence_break_g
[] = "BREAK-g";
1520 static const char *const interrupt_sequence_modes
[] =
1522 interrupt_sequence_control_c
,
1523 interrupt_sequence_break
,
1524 interrupt_sequence_break_g
,
1527 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
1530 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
1531 struct cmd_list_element
*c
,
1534 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
1535 fprintf_filtered (file
,
1536 _("Send the ASCII ETX character (Ctrl-c) "
1537 "to the remote target to interrupt the "
1538 "execution of the program.\n"));
1539 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
1540 fprintf_filtered (file
,
1541 _("send a break signal to the remote target "
1542 "to interrupt the execution of the program.\n"));
1543 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
1544 fprintf_filtered (file
,
1545 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1546 "the remote target to interrupt the execution "
1547 "of Linux kernel.\n"));
1549 internal_error (__FILE__
, __LINE__
,
1550 _("Invalid value for interrupt_sequence_mode: %s."),
1551 interrupt_sequence_mode
);
1554 /* This boolean variable specifies whether interrupt_sequence is sent
1555 to the remote target when gdb connects to it.
1556 This is mostly needed when you debug the Linux kernel: The Linux kernel
1557 expects BREAK g which is Magic SysRq g for connecting gdb. */
1558 static bool interrupt_on_connect
= false;
1560 /* This variable is used to implement the "set/show remotebreak" commands.
1561 Since these commands are now deprecated in favor of "set/show remote
1562 interrupt-sequence", it no longer has any effect on the code. */
1563 static bool remote_break
;
1566 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1569 interrupt_sequence_mode
= interrupt_sequence_break
;
1571 interrupt_sequence_mode
= interrupt_sequence_control_c
;
1575 show_remotebreak (struct ui_file
*file
, int from_tty
,
1576 struct cmd_list_element
*c
,
1581 /* This variable sets the number of bits in an address that are to be
1582 sent in a memory ("M" or "m") packet. Normally, after stripping
1583 leading zeros, the entire address would be sent. This variable
1584 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1585 initial implementation of remote.c restricted the address sent in
1586 memory packets to ``host::sizeof long'' bytes - (typically 32
1587 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1588 address was never sent. Since fixing this bug may cause a break in
1589 some remote targets this variable is principally provided to
1590 facilitate backward compatibility. */
1592 static unsigned int remote_address_size
;
1595 /* User configurable variables for the number of characters in a
1596 memory read/write packet. MIN (rsa->remote_packet_size,
1597 rsa->sizeof_g_packet) is the default. Some targets need smaller
1598 values (fifo overruns, et.al.) and some users need larger values
1599 (speed up transfers). The variables ``preferred_*'' (the user
1600 request), ``current_*'' (what was actually set) and ``forced_*''
1601 (Positive - a soft limit, negative - a hard limit). */
1603 struct memory_packet_config
1610 /* The default max memory-write-packet-size, when the setting is
1611 "fixed". The 16k is historical. (It came from older GDB's using
1612 alloca for buffers and the knowledge (folklore?) that some hosts
1613 don't cope very well with large alloca calls.) */
1614 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1616 /* The minimum remote packet size for memory transfers. Ensures we
1617 can write at least one byte. */
1618 #define MIN_MEMORY_PACKET_SIZE 20
1620 /* Get the memory packet size, assuming it is fixed. */
1623 get_fixed_memory_packet_size (struct memory_packet_config
*config
)
1625 gdb_assert (config
->fixed_p
);
1627 if (config
->size
<= 0)
1628 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
;
1630 return config
->size
;
1633 /* Compute the current size of a read/write packet. Since this makes
1634 use of ``actual_register_packet_size'' the computation is dynamic. */
1637 remote_target::get_memory_packet_size (struct memory_packet_config
*config
)
1639 struct remote_state
*rs
= get_remote_state ();
1640 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1643 if (config
->fixed_p
)
1644 what_they_get
= get_fixed_memory_packet_size (config
);
1647 what_they_get
= get_remote_packet_size ();
1648 /* Limit the packet to the size specified by the user. */
1649 if (config
->size
> 0
1650 && what_they_get
> config
->size
)
1651 what_they_get
= config
->size
;
1653 /* Limit it to the size of the targets ``g'' response unless we have
1654 permission from the stub to use a larger packet size. */
1655 if (rs
->explicit_packet_size
== 0
1656 && rsa
->actual_register_packet_size
> 0
1657 && what_they_get
> rsa
->actual_register_packet_size
)
1658 what_they_get
= rsa
->actual_register_packet_size
;
1660 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1661 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1663 /* Make sure there is room in the global buffer for this packet
1664 (including its trailing NUL byte). */
1665 if (rs
->buf
.size () < what_they_get
+ 1)
1666 rs
->buf
.resize (2 * what_they_get
);
1668 return what_they_get
;
1671 /* Update the size of a read/write packet. If they user wants
1672 something really big then do a sanity check. */
1675 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1677 int fixed_p
= config
->fixed_p
;
1678 long size
= config
->size
;
1681 error (_("Argument required (integer, `fixed' or `limited')."));
1682 else if (strcmp (args
, "hard") == 0
1683 || strcmp (args
, "fixed") == 0)
1685 else if (strcmp (args
, "soft") == 0
1686 || strcmp (args
, "limit") == 0)
1692 size
= strtoul (args
, &end
, 0);
1694 error (_("Invalid %s (bad syntax)."), config
->name
);
1696 /* Instead of explicitly capping the size of a packet to or
1697 disallowing it, the user is allowed to set the size to
1698 something arbitrarily large. */
1702 if (fixed_p
&& !config
->fixed_p
)
1704 /* So that the query shows the correct value. */
1705 long query_size
= (size
<= 0
1706 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1709 if (! query (_("The target may not be able to correctly handle a %s\n"
1710 "of %ld bytes. Change the packet size? "),
1711 config
->name
, query_size
))
1712 error (_("Packet size not changed."));
1714 /* Update the config. */
1715 config
->fixed_p
= fixed_p
;
1716 config
->size
= size
;
1720 show_memory_packet_size (struct memory_packet_config
*config
)
1722 if (config
->size
== 0)
1723 printf_filtered (_("The %s is 0 (default). "), config
->name
);
1725 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1726 if (config
->fixed_p
)
1727 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1728 get_fixed_memory_packet_size (config
));
1731 remote_target
*remote
= get_current_remote_target ();
1734 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1735 remote
->get_memory_packet_size (config
));
1737 puts_filtered ("The actual limit will be further reduced "
1738 "dependent on the target.\n");
1742 /* FIXME: needs to be per-remote-target. */
1743 static struct memory_packet_config memory_write_packet_config
=
1745 "memory-write-packet-size",
1749 set_memory_write_packet_size (const char *args
, int from_tty
)
1751 set_memory_packet_size (args
, &memory_write_packet_config
);
1755 show_memory_write_packet_size (const char *args
, int from_tty
)
1757 show_memory_packet_size (&memory_write_packet_config
);
1760 /* Show the number of hardware watchpoints that can be used. */
1763 show_hardware_watchpoint_limit (struct ui_file
*file
, int from_tty
,
1764 struct cmd_list_element
*c
,
1767 fprintf_filtered (file
, _("The maximum number of target hardware "
1768 "watchpoints is %s.\n"), value
);
1771 /* Show the length limit (in bytes) for hardware watchpoints. */
1774 show_hardware_watchpoint_length_limit (struct ui_file
*file
, int from_tty
,
1775 struct cmd_list_element
*c
,
1778 fprintf_filtered (file
, _("The maximum length (in bytes) of a target "
1779 "hardware watchpoint is %s.\n"), value
);
1782 /* Show the number of hardware breakpoints that can be used. */
1785 show_hardware_breakpoint_limit (struct ui_file
*file
, int from_tty
,
1786 struct cmd_list_element
*c
,
1789 fprintf_filtered (file
, _("The maximum number of target hardware "
1790 "breakpoints is %s.\n"), value
);
1793 /* Controls the maximum number of characters to display in the debug output
1794 for each remote packet. The remaining characters are omitted. */
1796 static int remote_packet_max_chars
= 512;
1798 /* Show the maximum number of characters to display for each remote packet
1799 when remote debugging is enabled. */
1802 show_remote_packet_max_chars (struct ui_file
*file
, int from_tty
,
1803 struct cmd_list_element
*c
,
1806 fprintf_filtered (file
, _("Number of remote packet characters to "
1807 "display is %s.\n"), value
);
1811 remote_target::get_memory_write_packet_size ()
1813 return get_memory_packet_size (&memory_write_packet_config
);
1816 /* FIXME: needs to be per-remote-target. */
1817 static struct memory_packet_config memory_read_packet_config
=
1819 "memory-read-packet-size",
1823 set_memory_read_packet_size (const char *args
, int from_tty
)
1825 set_memory_packet_size (args
, &memory_read_packet_config
);
1829 show_memory_read_packet_size (const char *args
, int from_tty
)
1831 show_memory_packet_size (&memory_read_packet_config
);
1835 remote_target::get_memory_read_packet_size ()
1837 long size
= get_memory_packet_size (&memory_read_packet_config
);
1839 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1840 extra buffer size argument before the memory read size can be
1841 increased beyond this. */
1842 if (size
> get_remote_packet_size ())
1843 size
= get_remote_packet_size ();
1849 struct packet_config
1854 /* If auto, GDB auto-detects support for this packet or feature,
1855 either through qSupported, or by trying the packet and looking
1856 at the response. If true, GDB assumes the target supports this
1857 packet. If false, the packet is disabled. Configs that don't
1858 have an associated command always have this set to auto. */
1859 enum auto_boolean detect
;
1861 /* Does the target support this packet? */
1862 enum packet_support support
;
1865 static enum packet_support
packet_config_support (struct packet_config
*config
);
1866 static enum packet_support
packet_support (int packet
);
1869 show_packet_config_cmd (struct packet_config
*config
)
1871 const char *support
= "internal-error";
1873 switch (packet_config_support (config
))
1876 support
= "enabled";
1878 case PACKET_DISABLE
:
1879 support
= "disabled";
1881 case PACKET_SUPPORT_UNKNOWN
:
1882 support
= "unknown";
1885 switch (config
->detect
)
1887 case AUTO_BOOLEAN_AUTO
:
1888 printf_filtered (_("Support for the `%s' packet "
1889 "is auto-detected, currently %s.\n"),
1890 config
->name
, support
);
1892 case AUTO_BOOLEAN_TRUE
:
1893 case AUTO_BOOLEAN_FALSE
:
1894 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1895 config
->name
, support
);
1901 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1902 const char *title
, int legacy
)
1908 config
->name
= name
;
1909 config
->title
= title
;
1910 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet.",
1912 show_doc
= xstrprintf ("Show current use of remote "
1913 "protocol `%s' (%s) packet.",
1915 /* set/show TITLE-packet {auto,on,off} */
1916 cmd_name
= xstrprintf ("%s-packet", title
);
1917 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1918 &config
->detect
, set_doc
,
1919 show_doc
, NULL
, /* help_doc */
1921 show_remote_protocol_packet_cmd
,
1922 &remote_set_cmdlist
, &remote_show_cmdlist
);
1923 /* The command code copies the documentation strings. */
1926 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1931 legacy_name
= xstrprintf ("%s-packet", name
);
1932 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1933 &remote_set_cmdlist
);
1934 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1935 &remote_show_cmdlist
);
1939 static enum packet_result
1940 packet_check_result (const char *buf
)
1944 /* The stub recognized the packet request. Check that the
1945 operation succeeded. */
1947 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1949 /* "Enn" - definitely an error. */
1950 return PACKET_ERROR
;
1952 /* Always treat "E." as an error. This will be used for
1953 more verbose error messages, such as E.memtypes. */
1954 if (buf
[0] == 'E' && buf
[1] == '.')
1955 return PACKET_ERROR
;
1957 /* The packet may or may not be OK. Just assume it is. */
1961 /* The stub does not support the packet. */
1962 return PACKET_UNKNOWN
;
1965 static enum packet_result
1966 packet_check_result (const gdb::char_vector
&buf
)
1968 return packet_check_result (buf
.data ());
1971 static enum packet_result
1972 packet_ok (const char *buf
, struct packet_config
*config
)
1974 enum packet_result result
;
1976 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1977 && config
->support
== PACKET_DISABLE
)
1978 internal_error (__FILE__
, __LINE__
,
1979 _("packet_ok: attempt to use a disabled packet"));
1981 result
= packet_check_result (buf
);
1986 /* The stub recognized the packet request. */
1987 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1990 fprintf_unfiltered (gdb_stdlog
,
1991 "Packet %s (%s) is supported\n",
1992 config
->name
, config
->title
);
1993 config
->support
= PACKET_ENABLE
;
1996 case PACKET_UNKNOWN
:
1997 /* The stub does not support the packet. */
1998 if (config
->detect
== AUTO_BOOLEAN_AUTO
1999 && config
->support
== PACKET_ENABLE
)
2001 /* If the stub previously indicated that the packet was
2002 supported then there is a protocol error. */
2003 error (_("Protocol error: %s (%s) conflicting enabled responses."),
2004 config
->name
, config
->title
);
2006 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
2008 /* The user set it wrong. */
2009 error (_("Enabled packet %s (%s) not recognized by stub"),
2010 config
->name
, config
->title
);
2014 fprintf_unfiltered (gdb_stdlog
,
2015 "Packet %s (%s) is NOT supported\n",
2016 config
->name
, config
->title
);
2017 config
->support
= PACKET_DISABLE
;
2024 static enum packet_result
2025 packet_ok (const gdb::char_vector
&buf
, struct packet_config
*config
)
2027 return packet_ok (buf
.data (), config
);
2044 PACKET_vFile_pwrite
,
2046 PACKET_vFile_unlink
,
2047 PACKET_vFile_readlink
,
2050 PACKET_qXfer_features
,
2051 PACKET_qXfer_exec_file
,
2052 PACKET_qXfer_libraries
,
2053 PACKET_qXfer_libraries_svr4
,
2054 PACKET_qXfer_memory_map
,
2055 PACKET_qXfer_osdata
,
2056 PACKET_qXfer_threads
,
2057 PACKET_qXfer_statictrace_read
,
2058 PACKET_qXfer_traceframe_info
,
2064 PACKET_QPassSignals
,
2065 PACKET_QCatchSyscalls
,
2066 PACKET_QProgramSignals
,
2067 PACKET_QSetWorkingDir
,
2068 PACKET_QStartupWithShell
,
2069 PACKET_QEnvironmentHexEncoded
,
2070 PACKET_QEnvironmentReset
,
2071 PACKET_QEnvironmentUnset
,
2073 PACKET_qSearch_memory
,
2076 PACKET_QStartNoAckMode
,
2078 PACKET_qXfer_siginfo_read
,
2079 PACKET_qXfer_siginfo_write
,
2082 /* Support for conditional tracepoints. */
2083 PACKET_ConditionalTracepoints
,
2085 /* Support for target-side breakpoint conditions. */
2086 PACKET_ConditionalBreakpoints
,
2088 /* Support for target-side breakpoint commands. */
2089 PACKET_BreakpointCommands
,
2091 /* Support for fast tracepoints. */
2092 PACKET_FastTracepoints
,
2094 /* Support for static tracepoints. */
2095 PACKET_StaticTracepoints
,
2097 /* Support for installing tracepoints while a trace experiment is
2099 PACKET_InstallInTrace
,
2103 PACKET_TracepointSource
,
2106 PACKET_QDisableRandomization
,
2108 PACKET_QTBuffer_size
,
2112 PACKET_qXfer_btrace
,
2114 /* Support for the QNonStop packet. */
2117 /* Support for the QThreadEvents packet. */
2118 PACKET_QThreadEvents
,
2120 /* Support for multi-process extensions. */
2121 PACKET_multiprocess_feature
,
2123 /* Support for enabling and disabling tracepoints while a trace
2124 experiment is running. */
2125 PACKET_EnableDisableTracepoints_feature
,
2127 /* Support for collecting strings using the tracenz bytecode. */
2128 PACKET_tracenz_feature
,
2130 /* Support for continuing to run a trace experiment while GDB is
2132 PACKET_DisconnectedTracing_feature
,
2134 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2135 PACKET_augmented_libraries_svr4_read_feature
,
2137 /* Support for the qXfer:btrace-conf:read packet. */
2138 PACKET_qXfer_btrace_conf
,
2140 /* Support for the Qbtrace-conf:bts:size packet. */
2141 PACKET_Qbtrace_conf_bts_size
,
2143 /* Support for swbreak+ feature. */
2144 PACKET_swbreak_feature
,
2146 /* Support for hwbreak+ feature. */
2147 PACKET_hwbreak_feature
,
2149 /* Support for fork events. */
2150 PACKET_fork_event_feature
,
2152 /* Support for vfork events. */
2153 PACKET_vfork_event_feature
,
2155 /* Support for the Qbtrace-conf:pt:size packet. */
2156 PACKET_Qbtrace_conf_pt_size
,
2158 /* Support for exec events. */
2159 PACKET_exec_event_feature
,
2161 /* Support for query supported vCont actions. */
2162 PACKET_vContSupported
,
2164 /* Support remote CTRL-C. */
2167 /* Support TARGET_WAITKIND_NO_RESUMED. */
2173 /* FIXME: needs to be per-remote-target. Ignoring this for now,
2174 assuming all remote targets are the same server (thus all support
2175 the same packets). */
2176 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
2178 /* Returns the packet's corresponding "set remote foo-packet" command
2179 state. See struct packet_config for more details. */
2181 static enum auto_boolean
2182 packet_set_cmd_state (int packet
)
2184 return remote_protocol_packets
[packet
].detect
;
2187 /* Returns whether a given packet or feature is supported. This takes
2188 into account the state of the corresponding "set remote foo-packet"
2189 command, which may be used to bypass auto-detection. */
2191 static enum packet_support
2192 packet_config_support (struct packet_config
*config
)
2194 switch (config
->detect
)
2196 case AUTO_BOOLEAN_TRUE
:
2197 return PACKET_ENABLE
;
2198 case AUTO_BOOLEAN_FALSE
:
2199 return PACKET_DISABLE
;
2200 case AUTO_BOOLEAN_AUTO
:
2201 return config
->support
;
2203 gdb_assert_not_reached (_("bad switch"));
2207 /* Same as packet_config_support, but takes the packet's enum value as
2210 static enum packet_support
2211 packet_support (int packet
)
2213 struct packet_config
*config
= &remote_protocol_packets
[packet
];
2215 return packet_config_support (config
);
2219 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
2220 struct cmd_list_element
*c
,
2223 struct packet_config
*packet
;
2225 for (packet
= remote_protocol_packets
;
2226 packet
< &remote_protocol_packets
[PACKET_MAX
];
2229 if (&packet
->detect
== c
->var
)
2231 show_packet_config_cmd (packet
);
2235 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
2239 /* Should we try one of the 'Z' requests? */
2243 Z_PACKET_SOFTWARE_BP
,
2244 Z_PACKET_HARDWARE_BP
,
2251 /* For compatibility with older distributions. Provide a ``set remote
2252 Z-packet ...'' command that updates all the Z packet types. */
2254 static enum auto_boolean remote_Z_packet_detect
;
2257 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
2258 struct cmd_list_element
*c
)
2262 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2263 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
2267 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
2268 struct cmd_list_element
*c
,
2273 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2275 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
2279 /* Returns true if the multi-process extensions are in effect. */
2282 remote_multi_process_p (struct remote_state
*rs
)
2284 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
2287 /* Returns true if fork events are supported. */
2290 remote_fork_event_p (struct remote_state
*rs
)
2292 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
2295 /* Returns true if vfork events are supported. */
2298 remote_vfork_event_p (struct remote_state
*rs
)
2300 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
2303 /* Returns true if exec events are supported. */
2306 remote_exec_event_p (struct remote_state
*rs
)
2308 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
2311 /* Insert fork catchpoint target routine. If fork events are enabled
2312 then return success, nothing more to do. */
2315 remote_target::insert_fork_catchpoint (int pid
)
2317 struct remote_state
*rs
= get_remote_state ();
2319 return !remote_fork_event_p (rs
);
2322 /* Remove fork catchpoint target routine. Nothing to do, just
2326 remote_target::remove_fork_catchpoint (int pid
)
2331 /* Insert vfork catchpoint target routine. If vfork events are enabled
2332 then return success, nothing more to do. */
2335 remote_target::insert_vfork_catchpoint (int pid
)
2337 struct remote_state
*rs
= get_remote_state ();
2339 return !remote_vfork_event_p (rs
);
2342 /* Remove vfork catchpoint target routine. Nothing to do, just
2346 remote_target::remove_vfork_catchpoint (int pid
)
2351 /* Insert exec catchpoint target routine. If exec events are
2352 enabled, just return success. */
2355 remote_target::insert_exec_catchpoint (int pid
)
2357 struct remote_state
*rs
= get_remote_state ();
2359 return !remote_exec_event_p (rs
);
2362 /* Remove exec catchpoint target routine. Nothing to do, just
2366 remote_target::remove_exec_catchpoint (int pid
)
2373 /* Take advantage of the fact that the TID field is not used, to tag
2374 special ptids with it set to != 0. */
2375 static const ptid_t
magic_null_ptid (42000, -1, 1);
2376 static const ptid_t
not_sent_ptid (42000, -2, 1);
2377 static const ptid_t
any_thread_ptid (42000, 0, 1);
2379 /* Find out if the stub attached to PID (and hence GDB should offer to
2380 detach instead of killing it when bailing out). */
2383 remote_target::remote_query_attached (int pid
)
2385 struct remote_state
*rs
= get_remote_state ();
2386 size_t size
= get_remote_packet_size ();
2388 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
2391 if (remote_multi_process_p (rs
))
2392 xsnprintf (rs
->buf
.data (), size
, "qAttached:%x", pid
);
2394 xsnprintf (rs
->buf
.data (), size
, "qAttached");
2397 getpkt (&rs
->buf
, 0);
2399 switch (packet_ok (rs
->buf
,
2400 &remote_protocol_packets
[PACKET_qAttached
]))
2403 if (strcmp (rs
->buf
.data (), "1") == 0)
2407 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
2409 case PACKET_UNKNOWN
:
2416 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2417 has been invented by GDB, instead of reported by the target. Since
2418 we can be connected to a remote system before before knowing about
2419 any inferior, mark the target with execution when we find the first
2420 inferior. If ATTACHED is 1, then we had just attached to this
2421 inferior. If it is 0, then we just created this inferior. If it
2422 is -1, then try querying the remote stub to find out if it had
2423 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2424 attempt to open this inferior's executable as the main executable
2425 if no main executable is open already. */
2428 remote_target::remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
2431 struct inferior
*inf
;
2433 /* Check whether this process we're learning about is to be
2434 considered attached, or if is to be considered to have been
2435 spawned by the stub. */
2437 attached
= remote_query_attached (pid
);
2439 if (gdbarch_has_global_solist (target_gdbarch ()))
2441 /* If the target shares code across all inferiors, then every
2442 attach adds a new inferior. */
2443 inf
= add_inferior (pid
);
2445 /* ... and every inferior is bound to the same program space.
2446 However, each inferior may still have its own address
2448 inf
->aspace
= maybe_new_address_space ();
2449 inf
->pspace
= current_program_space
;
2453 /* In the traditional debugging scenario, there's a 1-1 match
2454 between program/address spaces. We simply bind the inferior
2455 to the program space's address space. */
2456 inf
= current_inferior ();
2458 /* However, if the current inferior is already bound to a
2459 process, find some other empty inferior. */
2463 for (inferior
*it
: all_inferiors ())
2472 /* Since all inferiors were already bound to a process, add
2474 inf
= add_inferior_with_spaces ();
2476 switch_to_inferior_no_thread (inf
);
2478 inferior_appeared (inf
, pid
);
2481 inf
->attach_flag
= attached
;
2482 inf
->fake_pid_p
= fake_pid_p
;
2484 /* If no main executable is currently open then attempt to
2485 open the file that was executed to create this inferior. */
2486 if (try_open_exec
&& get_exec_file (0) == NULL
)
2487 exec_file_locate_attach (pid
, 0, 1);
2489 /* Check for exec file mismatch, and let the user solve it. */
2490 validate_exec_file (1);
2495 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
2496 static remote_thread_info
*get_remote_thread_info (remote_target
*target
,
2499 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2500 according to RUNNING. */
2503 remote_target::remote_add_thread (ptid_t ptid
, bool running
, bool executing
)
2505 struct remote_state
*rs
= get_remote_state ();
2506 struct thread_info
*thread
;
2508 /* GDB historically didn't pull threads in the initial connection
2509 setup. If the remote target doesn't even have a concept of
2510 threads (e.g., a bare-metal target), even if internally we
2511 consider that a single-threaded target, mentioning a new thread
2512 might be confusing to the user. Be silent then, preserving the
2513 age old behavior. */
2514 if (rs
->starting_up
)
2515 thread
= add_thread_silent (this, ptid
);
2517 thread
= add_thread (this, ptid
);
2519 /* We start by assuming threads are resumed. That state then gets updated
2520 when we process a matching stop reply. */
2521 get_remote_thread_info (thread
)->set_resumed ();
2523 set_executing (this, ptid
, executing
);
2524 set_running (this, ptid
, running
);
2529 /* Come here when we learn about a thread id from the remote target.
2530 It may be the first time we hear about such thread, so take the
2531 opportunity to add it to GDB's thread list. In case this is the
2532 first time we're noticing its corresponding inferior, add it to
2533 GDB's inferior list as well. EXECUTING indicates whether the
2534 thread is (internally) executing or stopped. */
2537 remote_target::remote_notice_new_inferior (ptid_t currthread
, int executing
)
2539 /* In non-stop mode, we assume new found threads are (externally)
2540 running until proven otherwise with a stop reply. In all-stop,
2541 we can only get here if all threads are stopped. */
2542 int running
= target_is_non_stop_p () ? 1 : 0;
2544 /* If this is a new thread, add it to GDB's thread list.
2545 If we leave it up to WFI to do this, bad things will happen. */
2547 thread_info
*tp
= find_thread_ptid (this, currthread
);
2548 if (tp
!= NULL
&& tp
->state
== THREAD_EXITED
)
2550 /* We're seeing an event on a thread id we knew had exited.
2551 This has to be a new thread reusing the old id. Add it. */
2552 remote_add_thread (currthread
, running
, executing
);
2556 if (!in_thread_list (this, currthread
))
2558 struct inferior
*inf
= NULL
;
2559 int pid
= currthread
.pid ();
2561 if (inferior_ptid
.is_pid ()
2562 && pid
== inferior_ptid
.pid ())
2564 /* inferior_ptid has no thread member yet. This can happen
2565 with the vAttach -> remote_wait,"TAAthread:" path if the
2566 stub doesn't support qC. This is the first stop reported
2567 after an attach, so this is the main thread. Update the
2568 ptid in the thread list. */
2569 if (in_thread_list (this, ptid_t (pid
)))
2570 thread_change_ptid (this, inferior_ptid
, currthread
);
2574 = remote_add_thread (currthread
, running
, executing
);
2575 switch_to_thread (thr
);
2580 if (magic_null_ptid
== inferior_ptid
)
2582 /* inferior_ptid is not set yet. This can happen with the
2583 vRun -> remote_wait,"TAAthread:" path if the stub
2584 doesn't support qC. This is the first stop reported
2585 after an attach, so this is the main thread. Update the
2586 ptid in the thread list. */
2587 thread_change_ptid (this, inferior_ptid
, currthread
);
2591 /* When connecting to a target remote, or to a target
2592 extended-remote which already was debugging an inferior, we
2593 may not know about it yet. Add it before adding its child
2594 thread, so notifications are emitted in a sensible order. */
2595 if (find_inferior_pid (this, currthread
.pid ()) == NULL
)
2597 struct remote_state
*rs
= get_remote_state ();
2598 bool fake_pid_p
= !remote_multi_process_p (rs
);
2600 inf
= remote_add_inferior (fake_pid_p
,
2601 currthread
.pid (), -1, 1);
2604 /* This is really a new thread. Add it. */
2605 thread_info
*new_thr
2606 = remote_add_thread (currthread
, running
, executing
);
2608 /* If we found a new inferior, let the common code do whatever
2609 it needs to with it (e.g., read shared libraries, insert
2610 breakpoints), unless we're just setting up an all-stop
2614 struct remote_state
*rs
= get_remote_state ();
2616 if (!rs
->starting_up
)
2617 notice_new_inferior (new_thr
, executing
, 0);
2622 /* Return THREAD's private thread data, creating it if necessary. */
2624 static remote_thread_info
*
2625 get_remote_thread_info (thread_info
*thread
)
2627 gdb_assert (thread
!= NULL
);
2629 if (thread
->priv
== NULL
)
2630 thread
->priv
.reset (new remote_thread_info
);
2632 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
2635 /* Return PTID's private thread data, creating it if necessary. */
2637 static remote_thread_info
*
2638 get_remote_thread_info (remote_target
*target
, ptid_t ptid
)
2640 thread_info
*thr
= find_thread_ptid (target
, ptid
);
2641 return get_remote_thread_info (thr
);
2644 /* Call this function as a result of
2645 1) A halt indication (T packet) containing a thread id
2646 2) A direct query of currthread
2647 3) Successful execution of set thread */
2650 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2652 rs
->general_thread
= currthread
;
2655 /* If 'QPassSignals' is supported, tell the remote stub what signals
2656 it can simply pass through to the inferior without reporting. */
2659 remote_target::pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2661 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2663 char *pass_packet
, *p
;
2665 struct remote_state
*rs
= get_remote_state ();
2667 gdb_assert (pass_signals
.size () < 256);
2668 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2670 if (pass_signals
[i
])
2673 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2674 strcpy (pass_packet
, "QPassSignals:");
2675 p
= pass_packet
+ strlen (pass_packet
);
2676 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2678 if (pass_signals
[i
])
2681 *p
++ = tohex (i
>> 4);
2682 *p
++ = tohex (i
& 15);
2691 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2693 putpkt (pass_packet
);
2694 getpkt (&rs
->buf
, 0);
2695 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2696 xfree (rs
->last_pass_packet
);
2697 rs
->last_pass_packet
= pass_packet
;
2700 xfree (pass_packet
);
2704 /* If 'QCatchSyscalls' is supported, tell the remote stub
2705 to report syscalls to GDB. */
2708 remote_target::set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
2709 gdb::array_view
<const int> syscall_counts
)
2711 const char *catch_packet
;
2712 enum packet_result result
;
2715 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2717 /* Not supported. */
2721 if (needed
&& any_count
== 0)
2723 /* Count how many syscalls are to be caught. */
2724 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2726 if (syscall_counts
[i
] != 0)
2733 fprintf_unfiltered (gdb_stdlog
,
2734 "remote_set_syscall_catchpoint "
2735 "pid %d needed %d any_count %d n_sysno %d\n",
2736 pid
, needed
, any_count
, n_sysno
);
2739 std::string built_packet
;
2742 /* Prepare a packet with the sysno list, assuming max 8+1
2743 characters for a sysno. If the resulting packet size is too
2744 big, fallback on the non-selective packet. */
2745 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2746 built_packet
.reserve (maxpktsz
);
2747 built_packet
= "QCatchSyscalls:1";
2750 /* Add in each syscall to be caught. */
2751 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2753 if (syscall_counts
[i
] != 0)
2754 string_appendf (built_packet
, ";%zx", i
);
2757 if (built_packet
.size () > get_remote_packet_size ())
2759 /* catch_packet too big. Fallback to less efficient
2760 non selective mode, with GDB doing the filtering. */
2761 catch_packet
= "QCatchSyscalls:1";
2764 catch_packet
= built_packet
.c_str ();
2767 catch_packet
= "QCatchSyscalls:0";
2769 struct remote_state
*rs
= get_remote_state ();
2771 putpkt (catch_packet
);
2772 getpkt (&rs
->buf
, 0);
2773 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2774 if (result
== PACKET_OK
)
2780 /* If 'QProgramSignals' is supported, tell the remote stub what
2781 signals it should pass through to the inferior when detaching. */
2784 remote_target::program_signals (gdb::array_view
<const unsigned char> signals
)
2786 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2790 struct remote_state
*rs
= get_remote_state ();
2792 gdb_assert (signals
.size () < 256);
2793 for (size_t i
= 0; i
< signals
.size (); i
++)
2798 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2799 strcpy (packet
, "QProgramSignals:");
2800 p
= packet
+ strlen (packet
);
2801 for (size_t i
= 0; i
< signals
.size (); i
++)
2803 if (signal_pass_state (i
))
2806 *p
++ = tohex (i
>> 4);
2807 *p
++ = tohex (i
& 15);
2816 if (!rs
->last_program_signals_packet
2817 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2820 getpkt (&rs
->buf
, 0);
2821 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2822 xfree (rs
->last_program_signals_packet
);
2823 rs
->last_program_signals_packet
= packet
;
2830 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2831 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2832 thread. If GEN is set, set the general thread, if not, then set
2833 the step/continue thread. */
2835 remote_target::set_thread (ptid_t ptid
, int gen
)
2837 struct remote_state
*rs
= get_remote_state ();
2838 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2839 char *buf
= rs
->buf
.data ();
2840 char *endbuf
= buf
+ get_remote_packet_size ();
2846 *buf
++ = gen
? 'g' : 'c';
2847 if (ptid
== magic_null_ptid
)
2848 xsnprintf (buf
, endbuf
- buf
, "0");
2849 else if (ptid
== any_thread_ptid
)
2850 xsnprintf (buf
, endbuf
- buf
, "0");
2851 else if (ptid
== minus_one_ptid
)
2852 xsnprintf (buf
, endbuf
- buf
, "-1");
2854 write_ptid (buf
, endbuf
, ptid
);
2856 getpkt (&rs
->buf
, 0);
2858 rs
->general_thread
= ptid
;
2860 rs
->continue_thread
= ptid
;
2864 remote_target::set_general_thread (ptid_t ptid
)
2866 set_thread (ptid
, 1);
2870 remote_target::set_continue_thread (ptid_t ptid
)
2872 set_thread (ptid
, 0);
2875 /* Change the remote current process. Which thread within the process
2876 ends up selected isn't important, as long as it is the same process
2877 as what INFERIOR_PTID points to.
2879 This comes from that fact that there is no explicit notion of
2880 "selected process" in the protocol. The selected process for
2881 general operations is the process the selected general thread
2885 remote_target::set_general_process ()
2887 struct remote_state
*rs
= get_remote_state ();
2889 /* If the remote can't handle multiple processes, don't bother. */
2890 if (!remote_multi_process_p (rs
))
2893 /* We only need to change the remote current thread if it's pointing
2894 at some other process. */
2895 if (rs
->general_thread
.pid () != inferior_ptid
.pid ())
2896 set_general_thread (inferior_ptid
);
2900 /* Return nonzero if this is the main thread that we made up ourselves
2901 to model non-threaded targets as single-threaded. */
2904 remote_thread_always_alive (ptid_t ptid
)
2906 if (ptid
== magic_null_ptid
)
2907 /* The main thread is always alive. */
2910 if (ptid
.pid () != 0 && ptid
.lwp () == 0)
2911 /* The main thread is always alive. This can happen after a
2912 vAttach, if the remote side doesn't support
2919 /* Return nonzero if the thread PTID is still alive on the remote
2923 remote_target::thread_alive (ptid_t ptid
)
2925 struct remote_state
*rs
= get_remote_state ();
2928 /* Check if this is a thread that we made up ourselves to model
2929 non-threaded targets as single-threaded. */
2930 if (remote_thread_always_alive (ptid
))
2933 p
= rs
->buf
.data ();
2934 endp
= p
+ get_remote_packet_size ();
2937 write_ptid (p
, endp
, ptid
);
2940 getpkt (&rs
->buf
, 0);
2941 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2944 /* Return a pointer to a thread name if we know it and NULL otherwise.
2945 The thread_info object owns the memory for the name. */
2948 remote_target::thread_name (struct thread_info
*info
)
2950 if (info
->priv
!= NULL
)
2952 const std::string
&name
= get_remote_thread_info (info
)->name
;
2953 return !name
.empty () ? name
.c_str () : NULL
;
2959 /* About these extended threadlist and threadinfo packets. They are
2960 variable length packets but, the fields within them are often fixed
2961 length. They are redundant enough to send over UDP as is the
2962 remote protocol in general. There is a matching unit test module
2965 /* WARNING: This threadref data structure comes from the remote O.S.,
2966 libstub protocol encoding, and remote.c. It is not particularly
2969 /* Right now, the internal structure is int. We want it to be bigger.
2970 Plan to fix this. */
2972 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2974 /* gdb_ext_thread_info is an internal GDB data structure which is
2975 equivalent to the reply of the remote threadinfo packet. */
2977 struct gdb_ext_thread_info
2979 threadref threadid
; /* External form of thread reference. */
2980 int active
; /* Has state interesting to GDB?
2982 char display
[256]; /* Brief state display, name,
2983 blocked/suspended. */
2984 char shortname
[32]; /* To be used to name threads. */
2985 char more_display
[256]; /* Long info, statistics, queue depth,
2989 /* The volume of remote transfers can be limited by submitting
2990 a mask containing bits specifying the desired information.
2991 Use a union of these values as the 'selection' parameter to
2992 get_thread_info. FIXME: Make these TAG names more thread specific. */
2994 #define TAG_THREADID 1
2995 #define TAG_EXISTS 2
2996 #define TAG_DISPLAY 4
2997 #define TAG_THREADNAME 8
2998 #define TAG_MOREDISPLAY 16
3000 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
3002 static const char *unpack_nibble (const char *buf
, int *val
);
3004 static const char *unpack_byte (const char *buf
, int *value
);
3006 static char *pack_int (char *buf
, int value
);
3008 static const char *unpack_int (const char *buf
, int *value
);
3010 static const char *unpack_string (const char *src
, char *dest
, int length
);
3012 static char *pack_threadid (char *pkt
, threadref
*id
);
3014 static const char *unpack_threadid (const char *inbuf
, threadref
*id
);
3016 void int_to_threadref (threadref
*id
, int value
);
3018 static int threadref_to_int (threadref
*ref
);
3020 static void copy_threadref (threadref
*dest
, threadref
*src
);
3022 static int threadmatch (threadref
*dest
, threadref
*src
);
3024 static char *pack_threadinfo_request (char *pkt
, int mode
,
3027 static char *pack_threadlist_request (char *pkt
, int startflag
,
3029 threadref
*nextthread
);
3031 static int remote_newthread_step (threadref
*ref
, void *context
);
3034 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
3035 buffer we're allowed to write to. Returns
3036 BUF+CHARACTERS_WRITTEN. */
3039 remote_target::write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
3042 struct remote_state
*rs
= get_remote_state ();
3044 if (remote_multi_process_p (rs
))
3048 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
3050 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
3054 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
3056 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
3061 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
3062 last parsed char. Returns null_ptid if no thread id is found, and
3063 throws an error if the thread id has an invalid format. */
3066 read_ptid (const char *buf
, const char **obuf
)
3068 const char *p
= buf
;
3070 ULONGEST pid
= 0, tid
= 0;
3074 /* Multi-process ptid. */
3075 pp
= unpack_varlen_hex (p
+ 1, &pid
);
3077 error (_("invalid remote ptid: %s"), p
);
3080 pp
= unpack_varlen_hex (p
+ 1, &tid
);
3083 return ptid_t (pid
, tid
, 0);
3086 /* No multi-process. Just a tid. */
3087 pp
= unpack_varlen_hex (p
, &tid
);
3089 /* Return null_ptid when no thread id is found. */
3097 /* Since the stub is not sending a process id, then default to
3098 what's in inferior_ptid, unless it's null at this point. If so,
3099 then since there's no way to know the pid of the reported
3100 threads, use the magic number. */
3101 if (inferior_ptid
== null_ptid
)
3102 pid
= magic_null_ptid
.pid ();
3104 pid
= inferior_ptid
.pid ();
3108 return ptid_t (pid
, tid
, 0);
3114 if (ch
>= 'a' && ch
<= 'f')
3115 return ch
- 'a' + 10;
3116 if (ch
>= '0' && ch
<= '9')
3118 if (ch
>= 'A' && ch
<= 'F')
3119 return ch
- 'A' + 10;
3124 stub_unpack_int (const char *buff
, int fieldlength
)
3131 nibble
= stubhex (*buff
++);
3135 retval
= retval
<< 4;
3141 unpack_nibble (const char *buf
, int *val
)
3143 *val
= fromhex (*buf
++);
3148 unpack_byte (const char *buf
, int *value
)
3150 *value
= stub_unpack_int (buf
, 2);
3155 pack_int (char *buf
, int value
)
3157 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
3158 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
3159 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
3160 buf
= pack_hex_byte (buf
, (value
& 0xff));
3165 unpack_int (const char *buf
, int *value
)
3167 *value
= stub_unpack_int (buf
, 8);
3171 #if 0 /* Currently unused, uncomment when needed. */
3172 static char *pack_string (char *pkt
, char *string
);
3175 pack_string (char *pkt
, char *string
)
3180 len
= strlen (string
);
3182 len
= 200; /* Bigger than most GDB packets, junk??? */
3183 pkt
= pack_hex_byte (pkt
, len
);
3187 if ((ch
== '\0') || (ch
== '#'))
3188 ch
= '*'; /* Protect encapsulation. */
3193 #endif /* 0 (unused) */
3196 unpack_string (const char *src
, char *dest
, int length
)
3205 pack_threadid (char *pkt
, threadref
*id
)
3208 unsigned char *altid
;
3210 altid
= (unsigned char *) id
;
3211 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
3213 pkt
= pack_hex_byte (pkt
, *altid
++);
3219 unpack_threadid (const char *inbuf
, threadref
*id
)
3222 const char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
3225 altref
= (char *) id
;
3227 while (inbuf
< limit
)
3229 x
= stubhex (*inbuf
++);
3230 y
= stubhex (*inbuf
++);
3231 *altref
++ = (x
<< 4) | y
;
3236 /* Externally, threadrefs are 64 bits but internally, they are still
3237 ints. This is due to a mismatch of specifications. We would like
3238 to use 64bit thread references internally. This is an adapter
3242 int_to_threadref (threadref
*id
, int value
)
3244 unsigned char *scan
;
3246 scan
= (unsigned char *) id
;
3252 *scan
++ = (value
>> 24) & 0xff;
3253 *scan
++ = (value
>> 16) & 0xff;
3254 *scan
++ = (value
>> 8) & 0xff;
3255 *scan
++ = (value
& 0xff);
3259 threadref_to_int (threadref
*ref
)
3262 unsigned char *scan
;
3268 value
= (value
<< 8) | ((*scan
++) & 0xff);
3273 copy_threadref (threadref
*dest
, threadref
*src
)
3276 unsigned char *csrc
, *cdest
;
3278 csrc
= (unsigned char *) src
;
3279 cdest
= (unsigned char *) dest
;
3286 threadmatch (threadref
*dest
, threadref
*src
)
3288 /* Things are broken right now, so just assume we got a match. */
3290 unsigned char *srcp
, *destp
;
3292 srcp
= (char *) src
;
3293 destp
= (char *) dest
;
3297 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
3304 threadid:1, # always request threadid
3311 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3314 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
3316 *pkt
++ = 'q'; /* Info Query */
3317 *pkt
++ = 'P'; /* process or thread info */
3318 pkt
= pack_int (pkt
, mode
); /* mode */
3319 pkt
= pack_threadid (pkt
, id
); /* threadid */
3320 *pkt
= '\0'; /* terminate */
3324 /* These values tag the fields in a thread info response packet. */
3325 /* Tagging the fields allows us to request specific fields and to
3326 add more fields as time goes by. */
3328 #define TAG_THREADID 1 /* Echo the thread identifier. */
3329 #define TAG_EXISTS 2 /* Is this process defined enough to
3330 fetch registers and its stack? */
3331 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3332 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3333 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3337 remote_target::remote_unpack_thread_info_response (const char *pkt
,
3338 threadref
*expectedref
,
3339 gdb_ext_thread_info
*info
)
3341 struct remote_state
*rs
= get_remote_state ();
3345 const char *limit
= pkt
+ rs
->buf
.size (); /* Plausible parsing limit. */
3348 /* info->threadid = 0; FIXME: implement zero_threadref. */
3350 info
->display
[0] = '\0';
3351 info
->shortname
[0] = '\0';
3352 info
->more_display
[0] = '\0';
3354 /* Assume the characters indicating the packet type have been
3356 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
3357 pkt
= unpack_threadid (pkt
, &ref
);
3360 warning (_("Incomplete response to threadinfo request."));
3361 if (!threadmatch (&ref
, expectedref
))
3362 { /* This is an answer to a different request. */
3363 warning (_("ERROR RMT Thread info mismatch."));
3366 copy_threadref (&info
->threadid
, &ref
);
3368 /* Loop on tagged fields , try to bail if something goes wrong. */
3370 /* Packets are terminated with nulls. */
3371 while ((pkt
< limit
) && mask
&& *pkt
)
3373 pkt
= unpack_int (pkt
, &tag
); /* tag */
3374 pkt
= unpack_byte (pkt
, &length
); /* length */
3375 if (!(tag
& mask
)) /* Tags out of synch with mask. */
3377 warning (_("ERROR RMT: threadinfo tag mismatch."));
3381 if (tag
== TAG_THREADID
)
3385 warning (_("ERROR RMT: length of threadid is not 16."));
3389 pkt
= unpack_threadid (pkt
, &ref
);
3390 mask
= mask
& ~TAG_THREADID
;
3393 if (tag
== TAG_EXISTS
)
3395 info
->active
= stub_unpack_int (pkt
, length
);
3397 mask
= mask
& ~(TAG_EXISTS
);
3400 warning (_("ERROR RMT: 'exists' length too long."));
3406 if (tag
== TAG_THREADNAME
)
3408 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
3409 mask
= mask
& ~TAG_THREADNAME
;
3412 if (tag
== TAG_DISPLAY
)
3414 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
3415 mask
= mask
& ~TAG_DISPLAY
;
3418 if (tag
== TAG_MOREDISPLAY
)
3420 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
3421 mask
= mask
& ~TAG_MOREDISPLAY
;
3424 warning (_("ERROR RMT: unknown thread info tag."));
3425 break; /* Not a tag we know about. */
3431 remote_target::remote_get_threadinfo (threadref
*threadid
,
3433 gdb_ext_thread_info
*info
)
3435 struct remote_state
*rs
= get_remote_state ();
3438 pack_threadinfo_request (rs
->buf
.data (), fieldset
, threadid
);
3440 getpkt (&rs
->buf
, 0);
3442 if (rs
->buf
[0] == '\0')
3445 result
= remote_unpack_thread_info_response (&rs
->buf
[2],
3450 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3453 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
3454 threadref
*nextthread
)
3456 *pkt
++ = 'q'; /* info query packet */
3457 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
3458 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
3459 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
3460 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
3465 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3468 remote_target::parse_threadlist_response (const char *pkt
, int result_limit
,
3469 threadref
*original_echo
,
3470 threadref
*resultlist
,
3473 struct remote_state
*rs
= get_remote_state ();
3474 int count
, resultcount
, done
;
3477 /* Assume the 'q' and 'M chars have been stripped. */
3478 const char *limit
= pkt
+ (rs
->buf
.size () - BUF_THREAD_ID_SIZE
);
3479 /* done parse past here */
3480 pkt
= unpack_byte (pkt
, &count
); /* count field */
3481 pkt
= unpack_nibble (pkt
, &done
);
3482 /* The first threadid is the argument threadid. */
3483 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
3484 while ((count
-- > 0) && (pkt
< limit
))
3486 pkt
= unpack_threadid (pkt
, resultlist
++);
3487 if (resultcount
++ >= result_limit
)
3495 /* Fetch the next batch of threads from the remote. Returns -1 if the
3496 qL packet is not supported, 0 on error and 1 on success. */
3499 remote_target::remote_get_threadlist (int startflag
, threadref
*nextthread
,
3500 int result_limit
, int *done
, int *result_count
,
3501 threadref
*threadlist
)
3503 struct remote_state
*rs
= get_remote_state ();
3506 /* Truncate result limit to be smaller than the packet size. */
3507 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
3508 >= get_remote_packet_size ())
3509 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
3511 pack_threadlist_request (rs
->buf
.data (), startflag
, result_limit
,
3514 getpkt (&rs
->buf
, 0);
3515 if (rs
->buf
[0] == '\0')
3517 /* Packet not supported. */
3522 parse_threadlist_response (&rs
->buf
[2], result_limit
,
3523 &rs
->echo_nextthread
, threadlist
, done
);
3525 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
3527 /* FIXME: This is a good reason to drop the packet. */
3528 /* Possibly, there is a duplicate response. */
3530 retransmit immediatly - race conditions
3531 retransmit after timeout - yes
3533 wait for packet, then exit
3535 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3536 return 0; /* I choose simply exiting. */
3538 if (*result_count
<= 0)
3542 warning (_("RMT ERROR : failed to get remote thread list."));
3545 return result
; /* break; */
3547 if (*result_count
> result_limit
)
3550 warning (_("RMT ERROR: threadlist response longer than requested."));
3556 /* Fetch the list of remote threads, with the qL packet, and call
3557 STEPFUNCTION for each thread found. Stops iterating and returns 1
3558 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3559 STEPFUNCTION returns false. If the packet is not supported,
3563 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction
,
3564 void *context
, int looplimit
)
3566 struct remote_state
*rs
= get_remote_state ();
3567 int done
, i
, result_count
;
3575 if (loopcount
++ > looplimit
)
3578 warning (_("Remote fetch threadlist -infinite loop-."));
3581 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
3582 MAXTHREADLISTRESULTS
,
3583 &done
, &result_count
,
3584 rs
->resultthreadlist
);
3587 /* Clear for later iterations. */
3589 /* Setup to resume next batch of thread references, set nextthread. */
3590 if (result_count
>= 1)
3591 copy_threadref (&rs
->nextthread
,
3592 &rs
->resultthreadlist
[result_count
- 1]);
3594 while (result_count
--)
3596 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
3606 /* A thread found on the remote target. */
3610 explicit thread_item (ptid_t ptid_
)
3614 thread_item (thread_item
&&other
) = default;
3615 thread_item
&operator= (thread_item
&&other
) = default;
3617 DISABLE_COPY_AND_ASSIGN (thread_item
);
3619 /* The thread's PTID. */
3622 /* The thread's extra info. */
3625 /* The thread's name. */
3628 /* The core the thread was running on. -1 if not known. */
3631 /* The thread handle associated with the thread. */
3632 gdb::byte_vector thread_handle
;
3635 /* Context passed around to the various methods listing remote
3636 threads. As new threads are found, they're added to the ITEMS
3639 struct threads_listing_context
3641 /* Return true if this object contains an entry for a thread with ptid
3644 bool contains_thread (ptid_t ptid
) const
3646 auto match_ptid
= [&] (const thread_item
&item
)
3648 return item
.ptid
== ptid
;
3651 auto it
= std::find_if (this->items
.begin (),
3655 return it
!= this->items
.end ();
3658 /* Remove the thread with ptid PTID. */
3660 void remove_thread (ptid_t ptid
)
3662 auto match_ptid
= [&] (const thread_item
&item
)
3664 return item
.ptid
== ptid
;
3667 auto it
= std::remove_if (this->items
.begin (),
3671 if (it
!= this->items
.end ())
3672 this->items
.erase (it
);
3675 /* The threads found on the remote target. */
3676 std::vector
<thread_item
> items
;
3680 remote_newthread_step (threadref
*ref
, void *data
)
3682 struct threads_listing_context
*context
3683 = (struct threads_listing_context
*) data
;
3684 int pid
= inferior_ptid
.pid ();
3685 int lwp
= threadref_to_int (ref
);
3686 ptid_t
ptid (pid
, lwp
);
3688 context
->items
.emplace_back (ptid
);
3690 return 1; /* continue iterator */
3693 #define CRAZY_MAX_THREADS 1000
3696 remote_target::remote_current_thread (ptid_t oldpid
)
3698 struct remote_state
*rs
= get_remote_state ();
3701 getpkt (&rs
->buf
, 0);
3702 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3707 result
= read_ptid (&rs
->buf
[2], &obuf
);
3708 if (*obuf
!= '\0' && remote_debug
)
3709 fprintf_unfiltered (gdb_stdlog
,
3710 "warning: garbage in qC reply\n");
3718 /* List remote threads using the deprecated qL packet. */
3721 remote_target::remote_get_threads_with_ql (threads_listing_context
*context
)
3723 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3724 CRAZY_MAX_THREADS
) >= 0)
3730 #if defined(HAVE_LIBEXPAT)
3733 start_thread (struct gdb_xml_parser
*parser
,
3734 const struct gdb_xml_element
*element
,
3736 std::vector
<gdb_xml_value
> &attributes
)
3738 struct threads_listing_context
*data
3739 = (struct threads_listing_context
*) user_data
;
3740 struct gdb_xml_value
*attr
;
3742 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3743 ptid_t ptid
= read_ptid (id
, NULL
);
3745 data
->items
.emplace_back (ptid
);
3746 thread_item
&item
= data
->items
.back ();
3748 attr
= xml_find_attribute (attributes
, "core");
3750 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3752 attr
= xml_find_attribute (attributes
, "name");
3754 item
.name
= (const char *) attr
->value
.get ();
3756 attr
= xml_find_attribute (attributes
, "handle");
3758 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3762 end_thread (struct gdb_xml_parser
*parser
,
3763 const struct gdb_xml_element
*element
,
3764 void *user_data
, const char *body_text
)
3766 struct threads_listing_context
*data
3767 = (struct threads_listing_context
*) user_data
;
3769 if (body_text
!= NULL
&& *body_text
!= '\0')
3770 data
->items
.back ().extra
= body_text
;
3773 const struct gdb_xml_attribute thread_attributes
[] = {
3774 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3775 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3776 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3777 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3778 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3781 const struct gdb_xml_element thread_children
[] = {
3782 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3785 const struct gdb_xml_element threads_children
[] = {
3786 { "thread", thread_attributes
, thread_children
,
3787 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3788 start_thread
, end_thread
},
3789 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3792 const struct gdb_xml_element threads_elements
[] = {
3793 { "threads", NULL
, threads_children
,
3794 GDB_XML_EF_NONE
, NULL
, NULL
},
3795 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3800 /* List remote threads using qXfer:threads:read. */
3803 remote_target::remote_get_threads_with_qxfer (threads_listing_context
*context
)
3805 #if defined(HAVE_LIBEXPAT)
3806 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3808 gdb::optional
<gdb::char_vector
> xml
3809 = target_read_stralloc (this, TARGET_OBJECT_THREADS
, NULL
);
3811 if (xml
&& (*xml
)[0] != '\0')
3813 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3814 threads_elements
, xml
->data (), context
);
3824 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3827 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context
*context
)
3829 struct remote_state
*rs
= get_remote_state ();
3831 if (rs
->use_threadinfo_query
)
3835 putpkt ("qfThreadInfo");
3836 getpkt (&rs
->buf
, 0);
3837 bufp
= rs
->buf
.data ();
3838 if (bufp
[0] != '\0') /* q packet recognized */
3840 while (*bufp
++ == 'm') /* reply contains one or more TID */
3844 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3845 context
->items
.emplace_back (ptid
);
3847 while (*bufp
++ == ','); /* comma-separated list */
3848 putpkt ("qsThreadInfo");
3849 getpkt (&rs
->buf
, 0);
3850 bufp
= rs
->buf
.data ();
3856 /* Packet not recognized. */
3857 rs
->use_threadinfo_query
= 0;
3864 /* Return true if INF only has one non-exited thread. */
3867 has_single_non_exited_thread (inferior
*inf
)
3870 for (thread_info
*tp ATTRIBUTE_UNUSED
: inf
->non_exited_threads ())
3876 /* Implement the to_update_thread_list function for the remote
3880 remote_target::update_thread_list ()
3882 struct threads_listing_context context
;
3885 /* We have a few different mechanisms to fetch the thread list. Try
3886 them all, starting with the most preferred one first, falling
3887 back to older methods. */
3888 if (remote_get_threads_with_qxfer (&context
)
3889 || remote_get_threads_with_qthreadinfo (&context
)
3890 || remote_get_threads_with_ql (&context
))
3894 if (context
.items
.empty ()
3895 && remote_thread_always_alive (inferior_ptid
))
3897 /* Some targets don't really support threads, but still
3898 reply an (empty) thread list in response to the thread
3899 listing packets, instead of replying "packet not
3900 supported". Exit early so we don't delete the main
3905 /* CONTEXT now holds the current thread list on the remote
3906 target end. Delete GDB-side threads no longer found on the
3908 for (thread_info
*tp
: all_threads_safe ())
3910 if (tp
->inf
->process_target () != this)
3913 if (!context
.contains_thread (tp
->ptid
))
3915 /* Do not remove the thread if it is the last thread in
3916 the inferior. This situation happens when we have a
3917 pending exit process status to process. Otherwise we
3918 may end up with a seemingly live inferior (i.e. pid
3919 != 0) that has no threads. */
3920 if (has_single_non_exited_thread (tp
->inf
))
3928 /* Remove any unreported fork child threads from CONTEXT so
3929 that we don't interfere with follow fork, which is where
3930 creation of such threads is handled. */
3931 remove_new_fork_children (&context
);
3933 /* And now add threads we don't know about yet to our list. */
3934 for (thread_item
&item
: context
.items
)
3936 if (item
.ptid
!= null_ptid
)
3938 /* In non-stop mode, we assume new found threads are
3939 executing until proven otherwise with a stop reply.
3940 In all-stop, we can only get here if all threads are
3942 int executing
= target_is_non_stop_p () ? 1 : 0;
3944 remote_notice_new_inferior (item
.ptid
, executing
);
3946 thread_info
*tp
= find_thread_ptid (this, item
.ptid
);
3947 remote_thread_info
*info
= get_remote_thread_info (tp
);
3948 info
->core
= item
.core
;
3949 info
->extra
= std::move (item
.extra
);
3950 info
->name
= std::move (item
.name
);
3951 info
->thread_handle
= std::move (item
.thread_handle
);
3958 /* If no thread listing method is supported, then query whether
3959 each known thread is alive, one by one, with the T packet.
3960 If the target doesn't support threads at all, then this is a
3961 no-op. See remote_thread_alive. */
3967 * Collect a descriptive string about the given thread.
3968 * The target may say anything it wants to about the thread
3969 * (typically info about its blocked / runnable state, name, etc.).
3970 * This string will appear in the info threads display.
3972 * Optional: targets are not required to implement this function.
3976 remote_target::extra_thread_info (thread_info
*tp
)
3978 struct remote_state
*rs
= get_remote_state ();
3981 struct gdb_ext_thread_info threadinfo
;
3983 if (rs
->remote_desc
== 0) /* paranoia */
3984 internal_error (__FILE__
, __LINE__
,
3985 _("remote_threads_extra_info"));
3987 if (tp
->ptid
== magic_null_ptid
3988 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
3989 /* This is the main thread which was added by GDB. The remote
3990 server doesn't know about it. */
3993 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
3995 /* If already have cached info, use it. */
3996 if (!extra
.empty ())
3997 return extra
.c_str ();
3999 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
4001 /* If we're using qXfer:threads:read, then the extra info is
4002 included in the XML. So if we didn't have anything cached,
4003 it's because there's really no extra info. */
4007 if (rs
->use_threadextra_query
)
4009 char *b
= rs
->buf
.data ();
4010 char *endb
= b
+ get_remote_packet_size ();
4012 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
4014 write_ptid (b
, endb
, tp
->ptid
);
4017 getpkt (&rs
->buf
, 0);
4018 if (rs
->buf
[0] != 0)
4020 extra
.resize (strlen (rs
->buf
.data ()) / 2);
4021 hex2bin (rs
->buf
.data (), (gdb_byte
*) &extra
[0], extra
.size ());
4022 return extra
.c_str ();
4026 /* If the above query fails, fall back to the old method. */
4027 rs
->use_threadextra_query
= 0;
4028 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
4029 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
4030 int_to_threadref (&id
, tp
->ptid
.lwp ());
4031 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
4032 if (threadinfo
.active
)
4034 if (*threadinfo
.shortname
)
4035 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
4036 if (*threadinfo
.display
)
4038 if (!extra
.empty ())
4040 string_appendf (extra
, " State: %s", threadinfo
.display
);
4042 if (*threadinfo
.more_display
)
4044 if (!extra
.empty ())
4046 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
4048 return extra
.c_str ();
4055 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
4056 struct static_tracepoint_marker
*marker
)
4058 struct remote_state
*rs
= get_remote_state ();
4059 char *p
= rs
->buf
.data ();
4061 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
4063 p
+= hexnumstr (p
, addr
);
4065 getpkt (&rs
->buf
, 0);
4066 p
= rs
->buf
.data ();
4069 error (_("Remote failure reply: %s"), p
);
4073 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
4080 std::vector
<static_tracepoint_marker
>
4081 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
4083 struct remote_state
*rs
= get_remote_state ();
4084 std::vector
<static_tracepoint_marker
> markers
;
4086 static_tracepoint_marker marker
;
4088 /* Ask for a first packet of static tracepoint marker
4091 getpkt (&rs
->buf
, 0);
4092 p
= rs
->buf
.data ();
4094 error (_("Remote failure reply: %s"), p
);
4100 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
4102 if (strid
== NULL
|| marker
.str_id
== strid
)
4103 markers
.push_back (std::move (marker
));
4105 while (*p
++ == ','); /* comma-separated list */
4106 /* Ask for another packet of static tracepoint definition. */
4108 getpkt (&rs
->buf
, 0);
4109 p
= rs
->buf
.data ();
4116 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4119 remote_target::get_ada_task_ptid (long lwp
, long thread
)
4121 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
4125 /* Restart the remote side; this is an extended protocol operation. */
4128 remote_target::extended_remote_restart ()
4130 struct remote_state
*rs
= get_remote_state ();
4132 /* Send the restart command; for reasons I don't understand the
4133 remote side really expects a number after the "R". */
4134 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "R%x", 0);
4137 remote_fileio_reset ();
4140 /* Clean up connection to a remote debugger. */
4143 remote_target::close ()
4145 /* Make sure we leave stdin registered in the event loop. */
4148 trace_reset_local_state ();
4153 remote_target::~remote_target ()
4155 struct remote_state
*rs
= get_remote_state ();
4157 /* Check for NULL because we may get here with a partially
4158 constructed target/connection. */
4159 if (rs
->remote_desc
== nullptr)
4162 serial_close (rs
->remote_desc
);
4164 /* We are destroying the remote target, so we should discard
4165 everything of this target. */
4166 discard_pending_stop_replies_in_queue ();
4168 if (rs
->remote_async_inferior_event_token
)
4169 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4171 delete rs
->notif_state
;
4174 /* Query the remote side for the text, data and bss offsets. */
4177 remote_target::get_offsets ()
4179 struct remote_state
*rs
= get_remote_state ();
4182 int lose
, num_segments
= 0, do_sections
, do_segments
;
4183 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4185 if (current_program_space
->symfile_object_file
== NULL
)
4188 putpkt ("qOffsets");
4189 getpkt (&rs
->buf
, 0);
4190 buf
= rs
->buf
.data ();
4192 if (buf
[0] == '\000')
4193 return; /* Return silently. Stub doesn't support
4197 warning (_("Remote failure reply: %s"), buf
);
4201 /* Pick up each field in turn. This used to be done with scanf, but
4202 scanf will make trouble if CORE_ADDR size doesn't match
4203 conversion directives correctly. The following code will work
4204 with any size of CORE_ADDR. */
4205 text_addr
= data_addr
= bss_addr
= 0;
4209 if (startswith (ptr
, "Text="))
4212 /* Don't use strtol, could lose on big values. */
4213 while (*ptr
&& *ptr
!= ';')
4214 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4216 if (startswith (ptr
, ";Data="))
4219 while (*ptr
&& *ptr
!= ';')
4220 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4225 if (!lose
&& startswith (ptr
, ";Bss="))
4228 while (*ptr
&& *ptr
!= ';')
4229 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4231 if (bss_addr
!= data_addr
)
4232 warning (_("Target reported unsupported offsets: %s"), buf
);
4237 else if (startswith (ptr
, "TextSeg="))
4240 /* Don't use strtol, could lose on big values. */
4241 while (*ptr
&& *ptr
!= ';')
4242 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4245 if (startswith (ptr
, ";DataSeg="))
4248 while (*ptr
&& *ptr
!= ';')
4249 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4257 error (_("Malformed response to offset query, %s"), buf
);
4258 else if (*ptr
!= '\0')
4259 warning (_("Target reported unsupported offsets: %s"), buf
);
4261 objfile
*objf
= current_program_space
->symfile_object_file
;
4262 section_offsets offs
= objf
->section_offsets
;
4264 symfile_segment_data_up data
= get_symfile_segment_data (objf
->obfd
);
4265 do_segments
= (data
!= NULL
);
4266 do_sections
= num_segments
== 0;
4268 if (num_segments
> 0)
4270 segments
[0] = text_addr
;
4271 segments
[1] = data_addr
;
4273 /* If we have two segments, we can still try to relocate everything
4274 by assuming that the .text and .data offsets apply to the whole
4275 text and data segments. Convert the offsets given in the packet
4276 to base addresses for symfile_map_offsets_to_segments. */
4277 else if (data
!= nullptr && data
->segments
.size () == 2)
4279 segments
[0] = data
->segments
[0].base
+ text_addr
;
4280 segments
[1] = data
->segments
[1].base
+ data_addr
;
4283 /* If the object file has only one segment, assume that it is text
4284 rather than data; main programs with no writable data are rare,
4285 but programs with no code are useless. Of course the code might
4286 have ended up in the data segment... to detect that we would need
4287 the permissions here. */
4288 else if (data
&& data
->segments
.size () == 1)
4290 segments
[0] = data
->segments
[0].base
+ text_addr
;
4293 /* There's no way to relocate by segment. */
4299 int ret
= symfile_map_offsets_to_segments (objf
->obfd
,
4301 num_segments
, segments
);
4303 if (ret
== 0 && !do_sections
)
4304 error (_("Can not handle qOffsets TextSeg "
4305 "response with this symbol file"));
4313 offs
[SECT_OFF_TEXT (objf
)] = text_addr
;
4315 /* This is a temporary kludge to force data and bss to use the
4316 same offsets because that's what nlmconv does now. The real
4317 solution requires changes to the stub and remote.c that I
4318 don't have time to do right now. */
4320 offs
[SECT_OFF_DATA (objf
)] = data_addr
;
4321 offs
[SECT_OFF_BSS (objf
)] = data_addr
;
4324 objfile_relocate (objf
, offs
);
4327 /* Send interrupt_sequence to remote target. */
4330 remote_target::send_interrupt_sequence ()
4332 struct remote_state
*rs
= get_remote_state ();
4334 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4335 remote_serial_write ("\x03", 1);
4336 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4337 serial_send_break (rs
->remote_desc
);
4338 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4340 serial_send_break (rs
->remote_desc
);
4341 remote_serial_write ("g", 1);
4344 internal_error (__FILE__
, __LINE__
,
4345 _("Invalid value for interrupt_sequence_mode: %s."),
4346 interrupt_sequence_mode
);
4350 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4351 and extract the PTID. Returns NULL_PTID if not found. */
4354 stop_reply_extract_thread (const char *stop_reply
)
4356 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4360 /* Txx r:val ; r:val (...) */
4363 /* Look for "register" named "thread". */
4368 p1
= strchr (p
, ':');
4372 if (strncmp (p
, "thread", p1
- p
) == 0)
4373 return read_ptid (++p1
, &p
);
4375 p1
= strchr (p
, ';');
4387 /* Determine the remote side's current thread. If we have a stop
4388 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4389 "thread" register we can extract the current thread from. If not,
4390 ask the remote which is the current thread with qC. The former
4391 method avoids a roundtrip. */
4394 remote_target::get_current_thread (const char *wait_status
)
4396 ptid_t ptid
= null_ptid
;
4398 /* Note we don't use remote_parse_stop_reply as that makes use of
4399 the target architecture, which we haven't yet fully determined at
4401 if (wait_status
!= NULL
)
4402 ptid
= stop_reply_extract_thread (wait_status
);
4403 if (ptid
== null_ptid
)
4404 ptid
= remote_current_thread (inferior_ptid
);
4409 /* Query the remote target for which is the current thread/process,
4410 add it to our tables, and update INFERIOR_PTID. The caller is
4411 responsible for setting the state such that the remote end is ready
4412 to return the current thread.
4414 This function is called after handling the '?' or 'vRun' packets,
4415 whose response is a stop reply from which we can also try
4416 extracting the thread. If the target doesn't support the explicit
4417 qC query, we infer the current thread from that stop reply, passed
4418 in in WAIT_STATUS, which may be NULL. */
4421 remote_target::add_current_inferior_and_thread (const char *wait_status
)
4423 struct remote_state
*rs
= get_remote_state ();
4424 bool fake_pid_p
= false;
4426 switch_to_no_thread ();
4428 /* Now, if we have thread information, update the current thread's
4430 ptid_t curr_ptid
= get_current_thread (wait_status
);
4432 if (curr_ptid
!= null_ptid
)
4434 if (!remote_multi_process_p (rs
))
4439 /* Without this, some commands which require an active target
4440 (such as kill) won't work. This variable serves (at least)
4441 double duty as both the pid of the target process (if it has
4442 such), and as a flag indicating that a target is active. */
4443 curr_ptid
= magic_null_ptid
;
4447 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4449 /* Add the main thread and switch to it. Don't try reading
4450 registers yet, since we haven't fetched the target description
4452 thread_info
*tp
= add_thread_silent (this, curr_ptid
);
4453 switch_to_thread_no_regs (tp
);
4456 /* Print info about a thread that was found already stopped on
4460 print_one_stopped_thread (struct thread_info
*thread
)
4462 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
4464 switch_to_thread (thread
);
4465 thread
->suspend
.stop_pc
= get_frame_pc (get_current_frame ());
4466 set_current_sal_from_frame (get_current_frame ());
4468 thread
->suspend
.waitstatus_pending_p
= 0;
4470 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
4472 enum gdb_signal sig
= ws
->value
.sig
;
4474 if (signal_print_state (sig
))
4475 gdb::observers::signal_received
.notify (sig
);
4477 gdb::observers::normal_stop
.notify (NULL
, 1);
4480 /* Process all initial stop replies the remote side sent in response
4481 to the ? packet. These indicate threads that were already stopped
4482 on initial connection. We mark these threads as stopped and print
4483 their current frame before giving the user the prompt. */
4486 remote_target::process_initial_stop_replies (int from_tty
)
4488 int pending_stop_replies
= stop_reply_queue_length ();
4489 struct thread_info
*selected
= NULL
;
4490 struct thread_info
*lowest_stopped
= NULL
;
4491 struct thread_info
*first
= NULL
;
4493 /* Consume the initial pending events. */
4494 while (pending_stop_replies
-- > 0)
4496 ptid_t waiton_ptid
= minus_one_ptid
;
4498 struct target_waitstatus ws
;
4499 int ignore_event
= 0;
4501 memset (&ws
, 0, sizeof (ws
));
4502 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4504 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4508 case TARGET_WAITKIND_IGNORE
:
4509 case TARGET_WAITKIND_NO_RESUMED
:
4510 case TARGET_WAITKIND_SIGNALLED
:
4511 case TARGET_WAITKIND_EXITED
:
4512 /* We shouldn't see these, but if we do, just ignore. */
4514 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
4518 case TARGET_WAITKIND_EXECD
:
4519 xfree (ws
.value
.execd_pathname
);
4528 thread_info
*evthread
= find_thread_ptid (this, event_ptid
);
4530 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4532 enum gdb_signal sig
= ws
.value
.sig
;
4534 /* Stubs traditionally report SIGTRAP as initial signal,
4535 instead of signal 0. Suppress it. */
4536 if (sig
== GDB_SIGNAL_TRAP
)
4538 evthread
->suspend
.stop_signal
= sig
;
4542 evthread
->suspend
.waitstatus
= ws
;
4544 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4545 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4546 evthread
->suspend
.waitstatus_pending_p
= 1;
4548 set_executing (this, event_ptid
, false);
4549 set_running (this, event_ptid
, false);
4550 get_remote_thread_info (evthread
)->set_not_resumed ();
4553 /* "Notice" the new inferiors before anything related to
4554 registers/memory. */
4555 for (inferior
*inf
: all_non_exited_inferiors (this))
4557 inf
->needs_setup
= 1;
4561 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4562 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4567 /* If all-stop on top of non-stop, pause all threads. Note this
4568 records the threads' stop pc, so must be done after "noticing"
4572 stop_all_threads ();
4574 /* If all threads of an inferior were already stopped, we
4575 haven't setup the inferior yet. */
4576 for (inferior
*inf
: all_non_exited_inferiors (this))
4578 if (inf
->needs_setup
)
4580 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4581 switch_to_thread_no_regs (thread
);
4587 /* Now go over all threads that are stopped, and print their current
4588 frame. If all-stop, then if there's a signalled thread, pick
4590 for (thread_info
*thread
: all_non_exited_threads (this))
4596 thread
->set_running (false);
4597 else if (thread
->state
!= THREAD_STOPPED
)
4600 if (selected
== NULL
4601 && thread
->suspend
.waitstatus_pending_p
)
4604 if (lowest_stopped
== NULL
4605 || thread
->inf
->num
< lowest_stopped
->inf
->num
4606 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4607 lowest_stopped
= thread
;
4610 print_one_stopped_thread (thread
);
4613 /* In all-stop, we only print the status of one thread, and leave
4614 others with their status pending. */
4617 thread_info
*thread
= selected
;
4619 thread
= lowest_stopped
;
4623 print_one_stopped_thread (thread
);
4626 /* For "info program". */
4627 thread_info
*thread
= inferior_thread ();
4628 if (thread
->state
== THREAD_STOPPED
)
4629 set_last_target_status (this, inferior_ptid
, thread
->suspend
.waitstatus
);
4632 /* Start the remote connection and sync state. */
4635 remote_target::start_remote (int from_tty
, int extended_p
)
4637 struct remote_state
*rs
= get_remote_state ();
4638 struct packet_config
*noack_config
;
4640 /* Signal other parts that we're going through the initial setup,
4641 and so things may not be stable yet. E.g., we don't try to
4642 install tracepoints until we've relocated symbols. Also, a
4643 Ctrl-C before we're connected and synced up can't interrupt the
4644 target. Instead, it offers to drop the (potentially wedged)
4646 rs
->starting_up
= 1;
4650 if (interrupt_on_connect
)
4651 send_interrupt_sequence ();
4653 /* Ack any packet which the remote side has already sent. */
4654 remote_serial_write ("+", 1);
4656 /* The first packet we send to the target is the optional "supported
4657 packets" request. If the target can answer this, it will tell us
4658 which later probes to skip. */
4659 remote_query_supported ();
4661 /* If the stub wants to get a QAllow, compose one and send it. */
4662 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4665 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4666 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4667 as a reply to known packet. For packet "vFile:setfs:" it is an
4668 invalid reply and GDB would return error in
4669 remote_hostio_set_filesystem, making remote files access impossible.
4670 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4671 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4673 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4675 putpkt (v_mustreplyempty
);
4676 getpkt (&rs
->buf
, 0);
4677 if (strcmp (rs
->buf
.data (), "OK") == 0)
4678 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4679 else if (strcmp (rs
->buf
.data (), "") != 0)
4680 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4684 /* Next, we possibly activate noack mode.
4686 If the QStartNoAckMode packet configuration is set to AUTO,
4687 enable noack mode if the stub reported a wish for it with
4690 If set to TRUE, then enable noack mode even if the stub didn't
4691 report it in qSupported. If the stub doesn't reply OK, the
4692 session ends with an error.
4694 If FALSE, then don't activate noack mode, regardless of what the
4695 stub claimed should be the default with qSupported. */
4697 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4698 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4700 putpkt ("QStartNoAckMode");
4701 getpkt (&rs
->buf
, 0);
4702 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4708 /* Tell the remote that we are using the extended protocol. */
4710 getpkt (&rs
->buf
, 0);
4713 /* Let the target know which signals it is allowed to pass down to
4715 update_signals_program_target ();
4717 /* Next, if the target can specify a description, read it. We do
4718 this before anything involving memory or registers. */
4719 target_find_description ();
4721 /* Next, now that we know something about the target, update the
4722 address spaces in the program spaces. */
4723 update_address_spaces ();
4725 /* On OSs where the list of libraries is global to all
4726 processes, we fetch them early. */
4727 if (gdbarch_has_global_solist (target_gdbarch ()))
4728 solib_add (NULL
, from_tty
, auto_solib_add
);
4730 if (target_is_non_stop_p ())
4732 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4733 error (_("Non-stop mode requested, but remote "
4734 "does not support non-stop"));
4736 putpkt ("QNonStop:1");
4737 getpkt (&rs
->buf
, 0);
4739 if (strcmp (rs
->buf
.data (), "OK") != 0)
4740 error (_("Remote refused setting non-stop mode with: %s"),
4743 /* Find about threads and processes the stub is already
4744 controlling. We default to adding them in the running state.
4745 The '?' query below will then tell us about which threads are
4747 this->update_thread_list ();
4749 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4751 /* Don't assume that the stub can operate in all-stop mode.
4752 Request it explicitly. */
4753 putpkt ("QNonStop:0");
4754 getpkt (&rs
->buf
, 0);
4756 if (strcmp (rs
->buf
.data (), "OK") != 0)
4757 error (_("Remote refused setting all-stop mode with: %s"),
4761 /* Upload TSVs regardless of whether the target is running or not. The
4762 remote stub, such as GDBserver, may have some predefined or builtin
4763 TSVs, even if the target is not running. */
4764 if (get_trace_status (current_trace_status ()) != -1)
4766 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4768 upload_trace_state_variables (&uploaded_tsvs
);
4769 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4772 /* Check whether the target is running now. */
4774 getpkt (&rs
->buf
, 0);
4776 if (!target_is_non_stop_p ())
4778 char *wait_status
= NULL
;
4780 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4783 error (_("The target is not running (try extended-remote?)"));
4785 /* We're connected, but not running. Drop out before we
4786 call start_remote. */
4787 rs
->starting_up
= 0;
4792 /* Save the reply for later. */
4793 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4794 strcpy (wait_status
, rs
->buf
.data ());
4797 /* Fetch thread list. */
4798 target_update_thread_list ();
4800 /* Let the stub know that we want it to return the thread. */
4801 set_continue_thread (minus_one_ptid
);
4803 if (thread_count (this) == 0)
4805 /* Target has no concept of threads at all. GDB treats
4806 non-threaded target as single-threaded; add a main
4808 add_current_inferior_and_thread (wait_status
);
4812 /* We have thread information; select the thread the target
4813 says should be current. If we're reconnecting to a
4814 multi-threaded program, this will ideally be the thread
4815 that last reported an event before GDB disconnected. */
4816 ptid_t curr_thread
= get_current_thread (wait_status
);
4817 if (curr_thread
== null_ptid
)
4819 /* Odd... The target was able to list threads, but not
4820 tell us which thread was current (no "thread"
4821 register in T stop reply?). Just pick the first
4822 thread in the thread list then. */
4825 fprintf_unfiltered (gdb_stdlog
,
4826 "warning: couldn't determine remote "
4827 "current thread; picking first in list.\n");
4829 for (thread_info
*tp
: all_non_exited_threads (this,
4832 switch_to_thread (tp
);
4837 switch_to_thread (find_thread_ptid (this, curr_thread
));
4840 /* init_wait_for_inferior should be called before get_offsets in order
4841 to manage `inserted' flag in bp loc in a correct state.
4842 breakpoint_init_inferior, called from init_wait_for_inferior, set
4843 `inserted' flag to 0, while before breakpoint_re_set, called from
4844 start_remote, set `inserted' flag to 1. In the initialization of
4845 inferior, breakpoint_init_inferior should be called first, and then
4846 breakpoint_re_set can be called. If this order is broken, state of
4847 `inserted' flag is wrong, and cause some problems on breakpoint
4849 init_wait_for_inferior ();
4851 get_offsets (); /* Get text, data & bss offsets. */
4853 /* If we could not find a description using qXfer, and we know
4854 how to do it some other way, try again. This is not
4855 supported for non-stop; it could be, but it is tricky if
4856 there are no stopped threads when we connect. */
4857 if (remote_read_description_p (this)
4858 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4860 target_clear_description ();
4861 target_find_description ();
4864 /* Use the previously fetched status. */
4865 gdb_assert (wait_status
!= NULL
);
4866 strcpy (rs
->buf
.data (), wait_status
);
4867 rs
->cached_wait_status
= 1;
4869 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4873 /* Clear WFI global state. Do this before finding about new
4874 threads and inferiors, and setting the current inferior.
4875 Otherwise we would clear the proceed status of the current
4876 inferior when we want its stop_soon state to be preserved
4877 (see notice_new_inferior). */
4878 init_wait_for_inferior ();
4880 /* In non-stop, we will either get an "OK", meaning that there
4881 are no stopped threads at this time; or, a regular stop
4882 reply. In the latter case, there may be more than one thread
4883 stopped --- we pull them all out using the vStopped
4885 if (strcmp (rs
->buf
.data (), "OK") != 0)
4887 struct notif_client
*notif
= ¬if_client_stop
;
4889 /* remote_notif_get_pending_replies acks this one, and gets
4891 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4892 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4893 remote_notif_get_pending_events (notif
);
4896 if (thread_count (this) == 0)
4899 error (_("The target is not running (try extended-remote?)"));
4901 /* We're connected, but not running. Drop out before we
4902 call start_remote. */
4903 rs
->starting_up
= 0;
4907 /* Report all signals during attach/startup. */
4910 /* If there are already stopped threads, mark them stopped and
4911 report their stops before giving the prompt to the user. */
4912 process_initial_stop_replies (from_tty
);
4914 if (target_can_async_p ())
4918 /* If we connected to a live target, do some additional setup. */
4919 if (target_has_execution ())
4921 /* No use without a symbol-file. */
4922 if (current_program_space
->symfile_object_file
)
4923 remote_check_symbols ();
4926 /* Possibly the target has been engaged in a trace run started
4927 previously; find out where things are at. */
4928 if (get_trace_status (current_trace_status ()) != -1)
4930 struct uploaded_tp
*uploaded_tps
= NULL
;
4932 if (current_trace_status ()->running
)
4933 printf_filtered (_("Trace is already running on the target.\n"));
4935 upload_tracepoints (&uploaded_tps
);
4937 merge_uploaded_tracepoints (&uploaded_tps
);
4940 /* Possibly the target has been engaged in a btrace record started
4941 previously; find out where things are at. */
4942 remote_btrace_maybe_reopen ();
4944 /* The thread and inferior lists are now synchronized with the
4945 target, our symbols have been relocated, and we're merged the
4946 target's tracepoints with ours. We're done with basic start
4948 rs
->starting_up
= 0;
4950 /* Maybe breakpoints are global and need to be inserted now. */
4951 if (breakpoints_should_be_inserted_now ())
4952 insert_breakpoints ();
4956 remote_target::connection_string ()
4958 remote_state
*rs
= get_remote_state ();
4960 if (rs
->remote_desc
->name
!= NULL
)
4961 return rs
->remote_desc
->name
;
4966 /* Open a connection to a remote debugger.
4967 NAME is the filename used for communication. */
4970 remote_target::open (const char *name
, int from_tty
)
4972 open_1 (name
, from_tty
, 0);
4975 /* Open a connection to a remote debugger using the extended
4976 remote gdb protocol. NAME is the filename used for communication. */
4979 extended_remote_target::open (const char *name
, int from_tty
)
4981 open_1 (name
, from_tty
, 1 /*extended_p */);
4984 /* Reset all packets back to "unknown support". Called when opening a
4985 new connection to a remote target. */
4988 reset_all_packet_configs_support (void)
4992 for (i
= 0; i
< PACKET_MAX
; i
++)
4993 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4996 /* Initialize all packet configs. */
4999 init_all_packet_configs (void)
5003 for (i
= 0; i
< PACKET_MAX
; i
++)
5005 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
5006 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5010 /* Symbol look-up. */
5013 remote_target::remote_check_symbols ()
5018 /* The remote side has no concept of inferiors that aren't running
5019 yet, it only knows about running processes. If we're connected
5020 but our current inferior is not running, we should not invite the
5021 remote target to request symbol lookups related to its
5022 (unrelated) current process. */
5023 if (!target_has_execution ())
5026 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
5029 /* Make sure the remote is pointing at the right process. Note
5030 there's no way to select "no process". */
5031 set_general_process ();
5033 /* Allocate a message buffer. We can't reuse the input buffer in RS,
5034 because we need both at the same time. */
5035 gdb::char_vector
msg (get_remote_packet_size ());
5036 gdb::char_vector
reply (get_remote_packet_size ());
5038 /* Invite target to request symbol lookups. */
5040 putpkt ("qSymbol::");
5042 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
5044 while (startswith (reply
.data (), "qSymbol:"))
5046 struct bound_minimal_symbol sym
;
5049 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
5052 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
5053 if (sym
.minsym
== NULL
)
5054 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
5058 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5059 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
5061 /* If this is a function address, return the start of code
5062 instead of any data function descriptor. */
5063 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
5065 current_top_target ());
5067 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
5068 phex_nz (sym_addr
, addr_size
), &reply
[8]);
5071 putpkt (msg
.data ());
5076 static struct serial
*
5077 remote_serial_open (const char *name
)
5079 static int udp_warning
= 0;
5081 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
5082 of in ser-tcp.c, because it is the remote protocol assuming that the
5083 serial connection is reliable and not the serial connection promising
5085 if (!udp_warning
&& startswith (name
, "udp:"))
5087 warning (_("The remote protocol may be unreliable over UDP.\n"
5088 "Some events may be lost, rendering further debugging "
5093 return serial_open (name
);
5096 /* Inform the target of our permission settings. The permission flags
5097 work without this, but if the target knows the settings, it can do
5098 a couple things. First, it can add its own check, to catch cases
5099 that somehow manage to get by the permissions checks in target
5100 methods. Second, if the target is wired to disallow particular
5101 settings (for instance, a system in the field that is not set up to
5102 be able to stop at a breakpoint), it can object to any unavailable
5106 remote_target::set_permissions ()
5108 struct remote_state
*rs
= get_remote_state ();
5110 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
5111 "WriteReg:%x;WriteMem:%x;"
5112 "InsertBreak:%x;InsertTrace:%x;"
5113 "InsertFastTrace:%x;Stop:%x",
5114 may_write_registers
, may_write_memory
,
5115 may_insert_breakpoints
, may_insert_tracepoints
,
5116 may_insert_fast_tracepoints
, may_stop
);
5118 getpkt (&rs
->buf
, 0);
5120 /* If the target didn't like the packet, warn the user. Do not try
5121 to undo the user's settings, that would just be maddening. */
5122 if (strcmp (rs
->buf
.data (), "OK") != 0)
5123 warning (_("Remote refused setting permissions with: %s"),
5127 /* This type describes each known response to the qSupported
5129 struct protocol_feature
5131 /* The name of this protocol feature. */
5134 /* The default for this protocol feature. */
5135 enum packet_support default_support
;
5137 /* The function to call when this feature is reported, or after
5138 qSupported processing if the feature is not supported.
5139 The first argument points to this structure. The second
5140 argument indicates whether the packet requested support be
5141 enabled, disabled, or probed (or the default, if this function
5142 is being called at the end of processing and this feature was
5143 not reported). The third argument may be NULL; if not NULL, it
5144 is a NUL-terminated string taken from the packet following
5145 this feature's name and an equals sign. */
5146 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5147 enum packet_support
, const char *);
5149 /* The corresponding packet for this feature. Only used if
5150 FUNC is remote_supported_packet. */
5155 remote_supported_packet (remote_target
*remote
,
5156 const struct protocol_feature
*feature
,
5157 enum packet_support support
,
5158 const char *argument
)
5162 warning (_("Remote qSupported response supplied an unexpected value for"
5163 " \"%s\"."), feature
->name
);
5167 remote_protocol_packets
[feature
->packet
].support
= support
;
5171 remote_target::remote_packet_size (const protocol_feature
*feature
,
5172 enum packet_support support
, const char *value
)
5174 struct remote_state
*rs
= get_remote_state ();
5179 if (support
!= PACKET_ENABLE
)
5182 if (value
== NULL
|| *value
== '\0')
5184 warning (_("Remote target reported \"%s\" without a size."),
5190 packet_size
= strtol (value
, &value_end
, 16);
5191 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5193 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5194 feature
->name
, value
);
5198 /* Record the new maximum packet size. */
5199 rs
->explicit_packet_size
= packet_size
;
5203 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5204 enum packet_support support
, const char *value
)
5206 remote
->remote_packet_size (feature
, support
, value
);
5209 static const struct protocol_feature remote_protocol_features
[] = {
5210 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5211 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5212 PACKET_qXfer_auxv
},
5213 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5214 PACKET_qXfer_exec_file
},
5215 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5216 PACKET_qXfer_features
},
5217 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5218 PACKET_qXfer_libraries
},
5219 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5220 PACKET_qXfer_libraries_svr4
},
5221 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5222 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5223 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5224 PACKET_qXfer_memory_map
},
5225 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5226 PACKET_qXfer_osdata
},
5227 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5228 PACKET_qXfer_threads
},
5229 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5230 PACKET_qXfer_traceframe_info
},
5231 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5232 PACKET_QPassSignals
},
5233 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5234 PACKET_QCatchSyscalls
},
5235 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5236 PACKET_QProgramSignals
},
5237 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5238 PACKET_QSetWorkingDir
},
5239 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5240 PACKET_QStartupWithShell
},
5241 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5242 PACKET_QEnvironmentHexEncoded
},
5243 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5244 PACKET_QEnvironmentReset
},
5245 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5246 PACKET_QEnvironmentUnset
},
5247 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5248 PACKET_QStartNoAckMode
},
5249 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5250 PACKET_multiprocess_feature
},
5251 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5252 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5253 PACKET_qXfer_siginfo_read
},
5254 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5255 PACKET_qXfer_siginfo_write
},
5256 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5257 PACKET_ConditionalTracepoints
},
5258 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5259 PACKET_ConditionalBreakpoints
},
5260 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5261 PACKET_BreakpointCommands
},
5262 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5263 PACKET_FastTracepoints
},
5264 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5265 PACKET_StaticTracepoints
},
5266 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5267 PACKET_InstallInTrace
},
5268 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5269 PACKET_DisconnectedTracing_feature
},
5270 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5272 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5274 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5275 PACKET_TracepointSource
},
5276 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5278 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5279 PACKET_EnableDisableTracepoints_feature
},
5280 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5281 PACKET_qXfer_fdpic
},
5282 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5284 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5285 PACKET_QDisableRandomization
},
5286 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5287 { "QTBuffer:size", PACKET_DISABLE
,
5288 remote_supported_packet
, PACKET_QTBuffer_size
},
5289 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5290 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5291 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5292 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5293 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5294 PACKET_qXfer_btrace
},
5295 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5296 PACKET_qXfer_btrace_conf
},
5297 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5298 PACKET_Qbtrace_conf_bts_size
},
5299 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5300 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5301 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5302 PACKET_fork_event_feature
},
5303 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5304 PACKET_vfork_event_feature
},
5305 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5306 PACKET_exec_event_feature
},
5307 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5308 PACKET_Qbtrace_conf_pt_size
},
5309 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5310 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5311 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5314 static char *remote_support_xml
;
5316 /* Register string appended to "xmlRegisters=" in qSupported query. */
5319 register_remote_support_xml (const char *xml
)
5321 #if defined(HAVE_LIBEXPAT)
5322 if (remote_support_xml
== NULL
)
5323 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5326 char *copy
= xstrdup (remote_support_xml
+ 13);
5328 char *p
= strtok_r (copy
, ",", &saveptr
);
5332 if (strcmp (p
, xml
) == 0)
5339 while ((p
= strtok_r (NULL
, ",", &saveptr
)) != NULL
);
5342 remote_support_xml
= reconcat (remote_support_xml
,
5343 remote_support_xml
, ",", xml
,
5350 remote_query_supported_append (std::string
*msg
, const char *append
)
5354 msg
->append (append
);
5358 remote_target::remote_query_supported ()
5360 struct remote_state
*rs
= get_remote_state ();
5363 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5365 /* The packet support flags are handled differently for this packet
5366 than for most others. We treat an error, a disabled packet, and
5367 an empty response identically: any features which must be reported
5368 to be used will be automatically disabled. An empty buffer
5369 accomplishes this, since that is also the representation for a list
5370 containing no features. */
5373 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5377 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5378 remote_query_supported_append (&q
, "multiprocess+");
5380 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5381 remote_query_supported_append (&q
, "swbreak+");
5382 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5383 remote_query_supported_append (&q
, "hwbreak+");
5385 remote_query_supported_append (&q
, "qRelocInsn+");
5387 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5388 != AUTO_BOOLEAN_FALSE
)
5389 remote_query_supported_append (&q
, "fork-events+");
5390 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5391 != AUTO_BOOLEAN_FALSE
)
5392 remote_query_supported_append (&q
, "vfork-events+");
5393 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5394 != AUTO_BOOLEAN_FALSE
)
5395 remote_query_supported_append (&q
, "exec-events+");
5397 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5398 remote_query_supported_append (&q
, "vContSupported+");
5400 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5401 remote_query_supported_append (&q
, "QThreadEvents+");
5403 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5404 remote_query_supported_append (&q
, "no-resumed+");
5406 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5407 the qSupported:xmlRegisters=i386 handling. */
5408 if (remote_support_xml
!= NULL
5409 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5410 remote_query_supported_append (&q
, remote_support_xml
);
5412 q
= "qSupported:" + q
;
5413 putpkt (q
.c_str ());
5415 getpkt (&rs
->buf
, 0);
5417 /* If an error occured, warn, but do not return - just reset the
5418 buffer to empty and go on to disable features. */
5419 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5422 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5427 memset (seen
, 0, sizeof (seen
));
5429 next
= rs
->buf
.data ();
5432 enum packet_support is_supported
;
5433 char *p
, *end
, *name_end
, *value
;
5435 /* First separate out this item from the rest of the packet. If
5436 there's another item after this, we overwrite the separator
5437 (terminated strings are much easier to work with). */
5439 end
= strchr (p
, ';');
5442 end
= p
+ strlen (p
);
5452 warning (_("empty item in \"qSupported\" response"));
5457 name_end
= strchr (p
, '=');
5460 /* This is a name=value entry. */
5461 is_supported
= PACKET_ENABLE
;
5462 value
= name_end
+ 1;
5471 is_supported
= PACKET_ENABLE
;
5475 is_supported
= PACKET_DISABLE
;
5479 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5483 warning (_("unrecognized item \"%s\" "
5484 "in \"qSupported\" response"), p
);
5490 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5491 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5493 const struct protocol_feature
*feature
;
5496 feature
= &remote_protocol_features
[i
];
5497 feature
->func (this, feature
, is_supported
, value
);
5502 /* If we increased the packet size, make sure to increase the global
5503 buffer size also. We delay this until after parsing the entire
5504 qSupported packet, because this is the same buffer we were
5506 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5507 rs
->buf
.resize (rs
->explicit_packet_size
);
5509 /* Handle the defaults for unmentioned features. */
5510 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5513 const struct protocol_feature
*feature
;
5515 feature
= &remote_protocol_features
[i
];
5516 feature
->func (this, feature
, feature
->default_support
, NULL
);
5520 /* Serial QUIT handler for the remote serial descriptor.
5522 Defers handling a Ctrl-C until we're done with the current
5523 command/response packet sequence, unless:
5525 - We're setting up the connection. Don't send a remote interrupt
5526 request, as we're not fully synced yet. Quit immediately
5529 - The target has been resumed in the foreground
5530 (target_terminal::is_ours is false) with a synchronous resume
5531 packet, and we're blocked waiting for the stop reply, thus a
5532 Ctrl-C should be immediately sent to the target.
5534 - We get a second Ctrl-C while still within the same serial read or
5535 write. In that case the serial is seemingly wedged --- offer to
5538 - We see a second Ctrl-C without target response, after having
5539 previously interrupted the target. In that case the target/stub
5540 is probably wedged --- offer to quit/disconnect.
5544 remote_target::remote_serial_quit_handler ()
5546 struct remote_state
*rs
= get_remote_state ();
5548 if (check_quit_flag ())
5550 /* If we're starting up, we're not fully synced yet. Quit
5552 if (rs
->starting_up
)
5554 else if (rs
->got_ctrlc_during_io
)
5556 if (query (_("The target is not responding to GDB commands.\n"
5557 "Stop debugging it? ")))
5558 remote_unpush_and_throw (this);
5560 /* If ^C has already been sent once, offer to disconnect. */
5561 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5563 /* All-stop protocol, and blocked waiting for stop reply. Send
5564 an interrupt request. */
5565 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5566 target_interrupt ();
5568 rs
->got_ctrlc_during_io
= 1;
5572 /* The remote_target that is current while the quit handler is
5573 overridden with remote_serial_quit_handler. */
5574 static remote_target
*curr_quit_handler_target
;
5577 remote_serial_quit_handler ()
5579 curr_quit_handler_target
->remote_serial_quit_handler ();
5582 /* Remove the remote target from the target stack of each inferior
5583 that is using it. Upper targets depend on it so remove them
5587 remote_unpush_target (remote_target
*target
)
5589 /* We have to unpush the target from all inferiors, even those that
5591 scoped_restore_current_inferior restore_current_inferior
;
5593 for (inferior
*inf
: all_inferiors (target
))
5595 switch_to_inferior_no_thread (inf
);
5596 pop_all_targets_at_and_above (process_stratum
);
5597 generic_mourn_inferior ();
5602 remote_unpush_and_throw (remote_target
*target
)
5604 remote_unpush_target (target
);
5605 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5609 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5611 remote_target
*curr_remote
= get_current_remote_target ();
5614 error (_("To open a remote debug connection, you need to specify what\n"
5615 "serial device is attached to the remote system\n"
5616 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5618 /* If we're connected to a running target, target_preopen will kill it.
5619 Ask this question first, before target_preopen has a chance to kill
5621 if (curr_remote
!= NULL
&& !target_has_execution ())
5624 && !query (_("Already connected to a remote target. Disconnect? ")))
5625 error (_("Still connected."));
5628 /* Here the possibly existing remote target gets unpushed. */
5629 target_preopen (from_tty
);
5631 remote_fileio_reset ();
5632 reopen_exec_file ();
5635 remote_target
*remote
5636 = (extended_p
? new extended_remote_target () : new remote_target ());
5637 target_ops_up
target_holder (remote
);
5639 remote_state
*rs
= remote
->get_remote_state ();
5641 /* See FIXME above. */
5642 if (!target_async_permitted
)
5643 rs
->wait_forever_enabled_p
= 1;
5645 rs
->remote_desc
= remote_serial_open (name
);
5646 if (!rs
->remote_desc
)
5647 perror_with_name (name
);
5649 if (baud_rate
!= -1)
5651 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5653 /* The requested speed could not be set. Error out to
5654 top level after closing remote_desc. Take care to
5655 set remote_desc to NULL to avoid closing remote_desc
5657 serial_close (rs
->remote_desc
);
5658 rs
->remote_desc
= NULL
;
5659 perror_with_name (name
);
5663 serial_setparity (rs
->remote_desc
, serial_parity
);
5664 serial_raw (rs
->remote_desc
);
5666 /* If there is something sitting in the buffer we might take it as a
5667 response to a command, which would be bad. */
5668 serial_flush_input (rs
->remote_desc
);
5672 puts_filtered ("Remote debugging using ");
5673 puts_filtered (name
);
5674 puts_filtered ("\n");
5677 /* Switch to using the remote target now. */
5678 push_target (std::move (target_holder
));
5680 /* Register extra event sources in the event loop. */
5681 rs
->remote_async_inferior_event_token
5682 = create_async_event_handler (remote_async_inferior_event_handler
, remote
,
5684 rs
->notif_state
= remote_notif_state_allocate (remote
);
5686 /* Reset the target state; these things will be queried either by
5687 remote_query_supported or as they are needed. */
5688 reset_all_packet_configs_support ();
5689 rs
->cached_wait_status
= 0;
5690 rs
->explicit_packet_size
= 0;
5692 rs
->extended
= extended_p
;
5693 rs
->waiting_for_stop_reply
= 0;
5694 rs
->ctrlc_pending_p
= 0;
5695 rs
->got_ctrlc_during_io
= 0;
5697 rs
->general_thread
= not_sent_ptid
;
5698 rs
->continue_thread
= not_sent_ptid
;
5699 rs
->remote_traceframe_number
= -1;
5701 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5703 /* Probe for ability to use "ThreadInfo" query, as required. */
5704 rs
->use_threadinfo_query
= 1;
5705 rs
->use_threadextra_query
= 1;
5707 rs
->readahead_cache
.invalidate ();
5709 if (target_async_permitted
)
5711 /* FIXME: cagney/1999-09-23: During the initial connection it is
5712 assumed that the target is already ready and able to respond to
5713 requests. Unfortunately remote_start_remote() eventually calls
5714 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5715 around this. Eventually a mechanism that allows
5716 wait_for_inferior() to expect/get timeouts will be
5718 rs
->wait_forever_enabled_p
= 0;
5721 /* First delete any symbols previously loaded from shared libraries. */
5722 no_shared_libraries (NULL
, 0);
5724 /* Start the remote connection. If error() or QUIT, discard this
5725 target (we'd otherwise be in an inconsistent state) and then
5726 propogate the error on up the exception chain. This ensures that
5727 the caller doesn't stumble along blindly assuming that the
5728 function succeeded. The CLI doesn't have this problem but other
5729 UI's, such as MI do.
5731 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5732 this function should return an error indication letting the
5733 caller restore the previous state. Unfortunately the command
5734 ``target remote'' is directly wired to this function making that
5735 impossible. On a positive note, the CLI side of this problem has
5736 been fixed - the function set_cmd_context() makes it possible for
5737 all the ``target ....'' commands to share a common callback
5738 function. See cli-dump.c. */
5743 remote
->start_remote (from_tty
, extended_p
);
5745 catch (const gdb_exception
&ex
)
5747 /* Pop the partially set up target - unless something else did
5748 already before throwing the exception. */
5749 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5750 remote_unpush_target (remote
);
5755 remote_btrace_reset (rs
);
5757 if (target_async_permitted
)
5758 rs
->wait_forever_enabled_p
= 1;
5761 /* Detach the specified process. */
5764 remote_target::remote_detach_pid (int pid
)
5766 struct remote_state
*rs
= get_remote_state ();
5768 /* This should not be necessary, but the handling for D;PID in
5769 GDBserver versions prior to 8.2 incorrectly assumes that the
5770 selected process points to the same process we're detaching,
5771 leading to misbehavior (and possibly GDBserver crashing) when it
5772 does not. Since it's easy and cheap, work around it by forcing
5773 GDBserver to select GDB's current process. */
5774 set_general_process ();
5776 if (remote_multi_process_p (rs
))
5777 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5779 strcpy (rs
->buf
.data (), "D");
5782 getpkt (&rs
->buf
, 0);
5784 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5786 else if (rs
->buf
[0] == '\0')
5787 error (_("Remote doesn't know how to detach"));
5789 error (_("Can't detach process."));
5792 /* This detaches a program to which we previously attached, using
5793 inferior_ptid to identify the process. After this is done, GDB
5794 can be used to debug some other program. We better not have left
5795 any breakpoints in the target program or it'll die when it hits
5799 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5801 int pid
= inferior_ptid
.pid ();
5802 struct remote_state
*rs
= get_remote_state ();
5805 if (!target_has_execution ())
5806 error (_("No process to detach from."));
5808 target_announce_detach (from_tty
);
5810 /* Tell the remote target to detach. */
5811 remote_detach_pid (pid
);
5813 /* Exit only if this is the only active inferior. */
5814 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors (this) == 1)
5815 puts_filtered (_("Ending remote debugging.\n"));
5817 thread_info
*tp
= find_thread_ptid (this, inferior_ptid
);
5819 /* Check to see if we are detaching a fork parent. Note that if we
5820 are detaching a fork child, tp == NULL. */
5821 is_fork_parent
= (tp
!= NULL
5822 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5824 /* If doing detach-on-fork, we don't mourn, because that will delete
5825 breakpoints that should be available for the followed inferior. */
5826 if (!is_fork_parent
)
5828 /* Save the pid as a string before mourning, since that will
5829 unpush the remote target, and we need the string after. */
5830 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5832 target_mourn_inferior (inferior_ptid
);
5833 if (print_inferior_events
)
5834 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5835 inf
->num
, infpid
.c_str ());
5839 switch_to_no_thread ();
5840 detach_inferior (current_inferior ());
5845 remote_target::detach (inferior
*inf
, int from_tty
)
5847 remote_detach_1 (inf
, from_tty
);
5851 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5853 remote_detach_1 (inf
, from_tty
);
5856 /* Target follow-fork function for remote targets. On entry, and
5857 at return, the current inferior is the fork parent.
5859 Note that although this is currently only used for extended-remote,
5860 it is named remote_follow_fork in anticipation of using it for the
5861 remote target as well. */
5864 remote_target::follow_fork (bool follow_child
, bool detach_fork
)
5866 struct remote_state
*rs
= get_remote_state ();
5867 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5869 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5870 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5872 /* When following the parent and detaching the child, we detach
5873 the child here. For the case of following the child and
5874 detaching the parent, the detach is done in the target-
5875 independent follow fork code in infrun.c. We can't use
5876 target_detach when detaching an unfollowed child because
5877 the client side doesn't know anything about the child. */
5878 if (detach_fork
&& !follow_child
)
5880 /* Detach the fork child. */
5884 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5885 child_pid
= child_ptid
.pid ();
5887 remote_detach_pid (child_pid
);
5894 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5895 in the program space of the new inferior. On entry and at return the
5896 current inferior is the exec'ing inferior. INF is the new exec'd
5897 inferior, which may be the same as the exec'ing inferior unless
5898 follow-exec-mode is "new". */
5901 remote_target::follow_exec (struct inferior
*inf
, const char *execd_pathname
)
5903 /* We know that this is a target file name, so if it has the "target:"
5904 prefix we strip it off before saving it in the program space. */
5905 if (is_target_filename (execd_pathname
))
5906 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5908 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5911 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5914 remote_target::disconnect (const char *args
, int from_tty
)
5917 error (_("Argument given to \"disconnect\" when remotely debugging."));
5919 /* Make sure we unpush even the extended remote targets. Calling
5920 target_mourn_inferior won't unpush, and
5921 remote_target::mourn_inferior won't unpush if there is more than
5922 one inferior left. */
5923 remote_unpush_target (this);
5926 puts_filtered ("Ending remote debugging.\n");
5929 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5930 be chatty about it. */
5933 extended_remote_target::attach (const char *args
, int from_tty
)
5935 struct remote_state
*rs
= get_remote_state ();
5937 char *wait_status
= NULL
;
5939 pid
= parse_pid_to_attach (args
);
5941 /* Remote PID can be freely equal to getpid, do not check it here the same
5942 way as in other targets. */
5944 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5945 error (_("This target does not support attaching to a process"));
5949 const char *exec_file
= get_exec_file (0);
5952 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5953 target_pid_to_str (ptid_t (pid
)).c_str ());
5955 printf_unfiltered (_("Attaching to %s\n"),
5956 target_pid_to_str (ptid_t (pid
)).c_str ());
5959 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
5961 getpkt (&rs
->buf
, 0);
5963 switch (packet_ok (rs
->buf
,
5964 &remote_protocol_packets
[PACKET_vAttach
]))
5967 if (!target_is_non_stop_p ())
5969 /* Save the reply for later. */
5970 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
5971 strcpy (wait_status
, rs
->buf
.data ());
5973 else if (strcmp (rs
->buf
.data (), "OK") != 0)
5974 error (_("Attaching to %s failed with: %s"),
5975 target_pid_to_str (ptid_t (pid
)).c_str (),
5978 case PACKET_UNKNOWN
:
5979 error (_("This target does not support attaching to a process"));
5981 error (_("Attaching to %s failed"),
5982 target_pid_to_str (ptid_t (pid
)).c_str ());
5985 switch_to_inferior_no_thread (remote_add_inferior (false, pid
, 1, 0));
5987 inferior_ptid
= ptid_t (pid
);
5989 if (target_is_non_stop_p ())
5991 /* Get list of threads. */
5992 update_thread_list ();
5994 thread_info
*thread
= first_thread_of_inferior (current_inferior ());
5995 if (thread
!= nullptr)
5996 switch_to_thread (thread
);
5998 /* Invalidate our notion of the remote current thread. */
5999 record_currthread (rs
, minus_one_ptid
);
6003 /* Now, if we have thread information, update the main thread's
6005 ptid_t curr_ptid
= remote_current_thread (ptid_t (pid
));
6007 /* Add the main thread to the thread list. */
6008 thread_info
*thr
= add_thread_silent (this, curr_ptid
);
6010 switch_to_thread (thr
);
6012 /* Don't consider the thread stopped until we've processed the
6013 saved stop reply. */
6014 set_executing (this, thr
->ptid
, true);
6017 /* Next, if the target can specify a description, read it. We do
6018 this before anything involving memory or registers. */
6019 target_find_description ();
6021 if (!target_is_non_stop_p ())
6023 /* Use the previously fetched status. */
6024 gdb_assert (wait_status
!= NULL
);
6026 if (target_can_async_p ())
6028 struct notif_event
*reply
6029 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
6031 push_stop_reply ((struct stop_reply
*) reply
);
6037 gdb_assert (wait_status
!= NULL
);
6038 strcpy (rs
->buf
.data (), wait_status
);
6039 rs
->cached_wait_status
= 1;
6043 gdb_assert (wait_status
== NULL
);
6046 /* Implementation of the to_post_attach method. */
6049 extended_remote_target::post_attach (int pid
)
6051 /* Get text, data & bss offsets. */
6054 /* In certain cases GDB might not have had the chance to start
6055 symbol lookup up until now. This could happen if the debugged
6056 binary is not using shared libraries, the vsyscall page is not
6057 present (on Linux) and the binary itself hadn't changed since the
6058 debugging process was started. */
6059 if (current_program_space
->symfile_object_file
!= NULL
)
6060 remote_check_symbols();
6064 /* Check for the availability of vCont. This function should also check
6068 remote_target::remote_vcont_probe ()
6070 remote_state
*rs
= get_remote_state ();
6073 strcpy (rs
->buf
.data (), "vCont?");
6075 getpkt (&rs
->buf
, 0);
6076 buf
= rs
->buf
.data ();
6078 /* Make sure that the features we assume are supported. */
6079 if (startswith (buf
, "vCont"))
6082 int support_c
, support_C
;
6084 rs
->supports_vCont
.s
= 0;
6085 rs
->supports_vCont
.S
= 0;
6088 rs
->supports_vCont
.t
= 0;
6089 rs
->supports_vCont
.r
= 0;
6090 while (p
&& *p
== ';')
6093 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6094 rs
->supports_vCont
.s
= 1;
6095 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6096 rs
->supports_vCont
.S
= 1;
6097 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6099 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6101 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6102 rs
->supports_vCont
.t
= 1;
6103 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6104 rs
->supports_vCont
.r
= 1;
6106 p
= strchr (p
, ';');
6109 /* If c, and C are not all supported, we can't use vCont. Clearing
6110 BUF will make packet_ok disable the packet. */
6111 if (!support_c
|| !support_C
)
6115 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
6116 rs
->supports_vCont_probed
= true;
6119 /* Helper function for building "vCont" resumptions. Write a
6120 resumption to P. ENDP points to one-passed-the-end of the buffer
6121 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6122 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6123 resumed thread should be single-stepped and/or signalled. If PTID
6124 equals minus_one_ptid, then all threads are resumed; if PTID
6125 represents a process, then all threads of the process are resumed;
6126 the thread to be stepped and/or signalled is given in the global
6130 remote_target::append_resumption (char *p
, char *endp
,
6131 ptid_t ptid
, int step
, gdb_signal siggnal
)
6133 struct remote_state
*rs
= get_remote_state ();
6135 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6136 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6138 /* GDB is willing to range step. */
6139 && use_range_stepping
6140 /* Target supports range stepping. */
6141 && rs
->supports_vCont
.r
6142 /* We don't currently support range stepping multiple
6143 threads with a wildcard (though the protocol allows it,
6144 so stubs shouldn't make an active effort to forbid
6146 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6148 struct thread_info
*tp
;
6150 if (ptid
== minus_one_ptid
)
6152 /* If we don't know about the target thread's tid, then
6153 we're resuming magic_null_ptid (see caller). */
6154 tp
= find_thread_ptid (this, magic_null_ptid
);
6157 tp
= find_thread_ptid (this, ptid
);
6158 gdb_assert (tp
!= NULL
);
6160 if (tp
->control
.may_range_step
)
6162 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6164 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6165 phex_nz (tp
->control
.step_range_start
,
6167 phex_nz (tp
->control
.step_range_end
,
6171 p
+= xsnprintf (p
, endp
- p
, ";s");
6174 p
+= xsnprintf (p
, endp
- p
, ";s");
6175 else if (siggnal
!= GDB_SIGNAL_0
)
6176 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6178 p
+= xsnprintf (p
, endp
- p
, ";c");
6180 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6184 /* All (-1) threads of process. */
6185 nptid
= ptid_t (ptid
.pid (), -1, 0);
6187 p
+= xsnprintf (p
, endp
- p
, ":");
6188 p
= write_ptid (p
, endp
, nptid
);
6190 else if (ptid
!= minus_one_ptid
)
6192 p
+= xsnprintf (p
, endp
- p
, ":");
6193 p
= write_ptid (p
, endp
, ptid
);
6199 /* Clear the thread's private info on resume. */
6202 resume_clear_thread_private_info (struct thread_info
*thread
)
6204 if (thread
->priv
!= NULL
)
6206 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6208 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6209 priv
->watch_data_address
= 0;
6213 /* Append a vCont continue-with-signal action for threads that have a
6214 non-zero stop signal. */
6217 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6220 for (thread_info
*thread
: all_non_exited_threads (this, ptid
))
6221 if (inferior_ptid
!= thread
->ptid
6222 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
6224 p
= append_resumption (p
, endp
, thread
->ptid
,
6225 0, thread
->suspend
.stop_signal
);
6226 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
6227 resume_clear_thread_private_info (thread
);
6233 /* Set the target running, using the packets that use Hc
6237 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6240 struct remote_state
*rs
= get_remote_state ();
6243 rs
->last_sent_signal
= siggnal
;
6244 rs
->last_sent_step
= step
;
6246 /* The c/s/C/S resume packets use Hc, so set the continue
6248 if (ptid
== minus_one_ptid
)
6249 set_continue_thread (any_thread_ptid
);
6251 set_continue_thread (ptid
);
6253 for (thread_info
*thread
: all_non_exited_threads (this))
6254 resume_clear_thread_private_info (thread
);
6256 buf
= rs
->buf
.data ();
6257 if (::execution_direction
== EXEC_REVERSE
)
6259 /* We don't pass signals to the target in reverse exec mode. */
6260 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6261 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6264 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6265 error (_("Remote reverse-step not supported."));
6266 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6267 error (_("Remote reverse-continue not supported."));
6269 strcpy (buf
, step
? "bs" : "bc");
6271 else if (siggnal
!= GDB_SIGNAL_0
)
6273 buf
[0] = step
? 'S' : 'C';
6274 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6275 buf
[2] = tohex (((int) siggnal
) & 0xf);
6279 strcpy (buf
, step
? "s" : "c");
6284 /* Resume the remote inferior by using a "vCont" packet. The thread
6285 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6286 resumed thread should be single-stepped and/or signalled. If PTID
6287 equals minus_one_ptid, then all threads are resumed; the thread to
6288 be stepped and/or signalled is given in the global INFERIOR_PTID.
6289 This function returns non-zero iff it resumes the inferior.
6291 This function issues a strict subset of all possible vCont commands
6295 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6296 enum gdb_signal siggnal
)
6298 struct remote_state
*rs
= get_remote_state ();
6302 /* No reverse execution actions defined for vCont. */
6303 if (::execution_direction
== EXEC_REVERSE
)
6306 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6307 remote_vcont_probe ();
6309 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6312 p
= rs
->buf
.data ();
6313 endp
= p
+ get_remote_packet_size ();
6315 /* If we could generate a wider range of packets, we'd have to worry
6316 about overflowing BUF. Should there be a generic
6317 "multi-part-packet" packet? */
6319 p
+= xsnprintf (p
, endp
- p
, "vCont");
6321 if (ptid
== magic_null_ptid
)
6323 /* MAGIC_NULL_PTID means that we don't have any active threads,
6324 so we don't have any TID numbers the inferior will
6325 understand. Make sure to only send forms that do not specify
6327 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6329 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6331 /* Resume all threads (of all processes, or of a single
6332 process), with preference for INFERIOR_PTID. This assumes
6333 inferior_ptid belongs to the set of all threads we are about
6335 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6337 /* Step inferior_ptid, with or without signal. */
6338 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6341 /* Also pass down any pending signaled resumption for other
6342 threads not the current. */
6343 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6345 /* And continue others without a signal. */
6346 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6350 /* Scheduler locking; resume only PTID. */
6351 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6354 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6357 if (target_is_non_stop_p ())
6359 /* In non-stop, the stub replies to vCont with "OK". The stop
6360 reply will be reported asynchronously by means of a `%Stop'
6362 getpkt (&rs
->buf
, 0);
6363 if (strcmp (rs
->buf
.data (), "OK") != 0)
6364 error (_("Unexpected vCont reply in non-stop mode: %s"),
6371 /* Tell the remote machine to resume. */
6374 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6376 struct remote_state
*rs
= get_remote_state ();
6378 /* When connected in non-stop mode, the core resumes threads
6379 individually. Resuming remote threads directly in target_resume
6380 would thus result in sending one packet per thread. Instead, to
6381 minimize roundtrip latency, here we just store the resume
6382 request (put the thread in RESUMED_PENDING_VCONT state); the actual remote
6383 resumption will be done in remote_target::commit_resume, where we'll be
6384 able to do vCont action coalescing. */
6385 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6387 remote_thread_info
*remote_thr
;
6389 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6390 remote_thr
= get_remote_thread_info (this, inferior_ptid
);
6392 remote_thr
= get_remote_thread_info (this, ptid
);
6394 /* We don't expect the core to ask to resume an already resumed (from
6395 its point of view) thread. */
6396 gdb_assert (remote_thr
->resume_state () == resume_state::NOT_RESUMED
);
6398 remote_thr
->set_resumed_pending_vcont (step
, siggnal
);
6402 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6403 (explained in remote-notif.c:handle_notification) so
6404 remote_notif_process is not called. We need find a place where
6405 it is safe to start a 'vNotif' sequence. It is good to do it
6406 before resuming inferior, because inferior was stopped and no RSP
6407 traffic at that moment. */
6408 if (!target_is_non_stop_p ())
6409 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6411 rs
->last_resume_exec_dir
= ::execution_direction
;
6413 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6414 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6415 remote_resume_with_hc (ptid
, step
, siggnal
);
6417 /* Update resumed state tracked by the remote target. */
6418 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6419 get_remote_thread_info (tp
)->set_resumed ();
6421 /* We are about to start executing the inferior, let's register it
6422 with the event loop. NOTE: this is the one place where all the
6423 execution commands end up. We could alternatively do this in each
6424 of the execution commands in infcmd.c. */
6425 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6426 into infcmd.c in order to allow inferior function calls to work
6427 NOT asynchronously. */
6428 if (target_can_async_p ())
6431 /* We've just told the target to resume. The remote server will
6432 wait for the inferior to stop, and then send a stop reply. In
6433 the mean time, we can't start another command/query ourselves
6434 because the stub wouldn't be ready to process it. This applies
6435 only to the base all-stop protocol, however. In non-stop (which
6436 only supports vCont), the stub replies with an "OK", and is
6437 immediate able to process further serial input. */
6438 if (!target_is_non_stop_p ())
6439 rs
->waiting_for_stop_reply
= 1;
6442 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6444 /* Private per-inferior info for target remote processes. */
6446 struct remote_inferior
: public private_inferior
6448 /* Whether we can send a wildcard vCont for this process. */
6449 bool may_wildcard_vcont
= true;
6452 /* Get the remote private inferior data associated to INF. */
6454 static remote_inferior
*
6455 get_remote_inferior (inferior
*inf
)
6457 if (inf
->priv
== NULL
)
6458 inf
->priv
.reset (new remote_inferior
);
6460 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6463 /* Class used to track the construction of a vCont packet in the
6464 outgoing packet buffer. This is used to send multiple vCont
6465 packets if we have more actions than would fit a single packet. */
6470 explicit vcont_builder (remote_target
*remote
)
6477 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6482 /* The remote target. */
6483 remote_target
*m_remote
;
6485 /* Pointer to the first action. P points here if no action has been
6487 char *m_first_action
;
6489 /* Where the next action will be appended. */
6492 /* The end of the buffer. Must never write past this. */
6496 /* Prepare the outgoing buffer for a new vCont packet. */
6499 vcont_builder::restart ()
6501 struct remote_state
*rs
= m_remote
->get_remote_state ();
6503 m_p
= rs
->buf
.data ();
6504 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6505 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6506 m_first_action
= m_p
;
6509 /* If the vCont packet being built has any action, send it to the
6513 vcont_builder::flush ()
6515 struct remote_state
*rs
;
6517 if (m_p
== m_first_action
)
6520 rs
= m_remote
->get_remote_state ();
6521 m_remote
->putpkt (rs
->buf
);
6522 m_remote
->getpkt (&rs
->buf
, 0);
6523 if (strcmp (rs
->buf
.data (), "OK") != 0)
6524 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6527 /* The largest action is range-stepping, with its two addresses. This
6528 is more than sufficient. If a new, bigger action is created, it'll
6529 quickly trigger a failed assertion in append_resumption (and we'll
6531 #define MAX_ACTION_SIZE 200
6533 /* Append a new vCont action in the outgoing packet being built. If
6534 the action doesn't fit the packet along with previous actions, push
6535 what we've got so far to the remote end and start over a new vCont
6536 packet (with the new action). */
6539 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6541 char buf
[MAX_ACTION_SIZE
+ 1];
6543 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6544 ptid
, step
, siggnal
);
6546 /* Check whether this new action would fit in the vCont packet along
6547 with previous actions. If not, send what we've got so far and
6548 start a new vCont packet. */
6549 size_t rsize
= endp
- buf
;
6550 if (rsize
> m_endp
- m_p
)
6555 /* Should now fit. */
6556 gdb_assert (rsize
<= m_endp
- m_p
);
6559 memcpy (m_p
, buf
, rsize
);
6564 /* to_commit_resume implementation. */
6567 remote_target::commit_resume ()
6569 int any_process_wildcard
;
6570 int may_global_wildcard_vcont
;
6572 /* If connected in all-stop mode, we'd send the remote resume
6573 request directly from remote_resume. Likewise if
6574 reverse-debugging, as there are no defined vCont actions for
6575 reverse execution. */
6576 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6579 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6580 instead of resuming all threads of each process individually.
6581 However, if any thread of a process must remain halted, we can't
6582 send wildcard resumes and must send one action per thread.
6584 Care must be taken to not resume threads/processes the server
6585 side already told us are stopped, but the core doesn't know about
6586 yet, because the events are still in the vStopped notification
6589 #1 => vCont s:p1.1;c
6591 #3 <= %Stopped T05 p1.1
6596 #8 (infrun handles the stop for p1.1 and continues stepping)
6597 #9 => vCont s:p1.1;c
6599 The last vCont above would resume thread p1.2 by mistake, because
6600 the server has no idea that the event for p1.2 had not been
6603 The server side must similarly ignore resume actions for the
6604 thread that has a pending %Stopped notification (and any other
6605 threads with events pending), until GDB acks the notification
6606 with vStopped. Otherwise, e.g., the following case is
6609 #1 => g (or any other packet)
6611 #3 <= %Stopped T05 p1.2
6612 #4 => vCont s:p1.1;c
6615 Above, the server must not resume thread p1.2. GDB can't know
6616 that p1.2 stopped until it acks the %Stopped notification, and
6617 since from GDB's perspective all threads should be running, it
6620 Finally, special care must also be given to handling fork/vfork
6621 events. A (v)fork event actually tells us that two processes
6622 stopped -- the parent and the child. Until we follow the fork,
6623 we must not resume the child. Therefore, if we have a pending
6624 fork follow, we must not send a global wildcard resume action
6625 (vCont;c). We can still send process-wide wildcards though. */
6627 /* Start by assuming a global wildcard (vCont;c) is possible. */
6628 may_global_wildcard_vcont
= 1;
6630 /* And assume every process is individually wildcard-able too. */
6631 for (inferior
*inf
: all_non_exited_inferiors (this))
6633 remote_inferior
*priv
= get_remote_inferior (inf
);
6635 priv
->may_wildcard_vcont
= true;
6638 /* Check for any pending events (not reported or processed yet) and
6639 disable process and global wildcard resumes appropriately. */
6640 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6642 for (thread_info
*tp
: all_non_exited_threads (this))
6644 remote_thread_info
*priv
= get_remote_thread_info (tp
);
6646 /* If a thread of a process is not meant to be resumed, then we
6647 can't wildcard that process. */
6648 if (priv
->resume_state () == resume_state::NOT_RESUMED
)
6650 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6652 /* And if we can't wildcard a process, we can't wildcard
6653 everything either. */
6654 may_global_wildcard_vcont
= 0;
6658 /* If a thread is the parent of an unfollowed fork, then we
6659 can't do a global wildcard, as that would resume the fork
6661 if (is_pending_fork_parent_thread (tp
))
6662 may_global_wildcard_vcont
= 0;
6665 /* Now let's build the vCont packet(s). Actions must be appended
6666 from narrower to wider scopes (thread -> process -> global). If
6667 we end up with too many actions for a single packet vcont_builder
6668 flushes the current vCont packet to the remote side and starts a
6670 struct vcont_builder
vcont_builder (this);
6672 /* Threads first. */
6673 for (thread_info
*tp
: all_non_exited_threads (this))
6675 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6677 /* If the thread was previously vCont-resumed, no need to send a specific
6678 action for it. If we didn't receive a resume request for it, don't
6679 send an action for it either. */
6680 if (remote_thr
->resume_state () != resume_state::RESUMED_PENDING_VCONT
)
6683 gdb_assert (!thread_is_in_step_over_chain (tp
));
6685 const resumed_pending_vcont_info
&info
6686 = remote_thr
->resumed_pending_vcont_info ();
6688 /* Check if we need to send a specific action for this thread. If not,
6689 it will be included in a wildcard resume instead. */
6690 if (info
.step
|| info
.sig
!= GDB_SIGNAL_0
6691 || !get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6692 vcont_builder
.push_action (tp
->ptid
, info
.step
, info
.sig
);
6694 remote_thr
->set_resumed ();
6697 /* Now check whether we can send any process-wide wildcard. This is
6698 to avoid sending a global wildcard in the case nothing is
6699 supposed to be resumed. */
6700 any_process_wildcard
= 0;
6702 for (inferior
*inf
: all_non_exited_inferiors (this))
6704 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6706 any_process_wildcard
= 1;
6711 if (any_process_wildcard
)
6713 /* If all processes are wildcard-able, then send a single "c"
6714 action, otherwise, send an "all (-1) threads of process"
6715 continue action for each running process, if any. */
6716 if (may_global_wildcard_vcont
)
6718 vcont_builder
.push_action (minus_one_ptid
,
6719 false, GDB_SIGNAL_0
);
6723 for (inferior
*inf
: all_non_exited_inferiors (this))
6725 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6727 vcont_builder
.push_action (ptid_t (inf
->pid
),
6728 false, GDB_SIGNAL_0
);
6734 vcont_builder
.flush ();
6739 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6740 thread, all threads of a remote process, or all threads of all
6744 remote_target::remote_stop_ns (ptid_t ptid
)
6746 struct remote_state
*rs
= get_remote_state ();
6747 char *p
= rs
->buf
.data ();
6748 char *endp
= p
+ get_remote_packet_size ();
6750 /* FIXME: This supports_vCont_probed check is a workaround until
6751 packet_support is per-connection. */
6752 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6753 || !rs
->supports_vCont_probed
)
6754 remote_vcont_probe ();
6756 if (!rs
->supports_vCont
.t
)
6757 error (_("Remote server does not support stopping threads"));
6759 if (ptid
== minus_one_ptid
6760 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6761 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6766 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6769 /* All (-1) threads of process. */
6770 nptid
= ptid_t (ptid
.pid (), -1, 0);
6773 /* Small optimization: if we already have a stop reply for
6774 this thread, no use in telling the stub we want this
6776 if (peek_stop_reply (ptid
))
6782 write_ptid (p
, endp
, nptid
);
6785 /* In non-stop, we get an immediate OK reply. The stop reply will
6786 come in asynchronously by notification. */
6788 getpkt (&rs
->buf
, 0);
6789 if (strcmp (rs
->buf
.data (), "OK") != 0)
6790 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6794 /* All-stop version of target_interrupt. Sends a break or a ^C to
6795 interrupt the remote target. It is undefined which thread of which
6796 process reports the interrupt. */
6799 remote_target::remote_interrupt_as ()
6801 struct remote_state
*rs
= get_remote_state ();
6803 rs
->ctrlc_pending_p
= 1;
6805 /* If the inferior is stopped already, but the core didn't know
6806 about it yet, just ignore the request. The cached wait status
6807 will be collected in remote_wait. */
6808 if (rs
->cached_wait_status
)
6811 /* Send interrupt_sequence to remote target. */
6812 send_interrupt_sequence ();
6815 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6816 the remote target. It is undefined which thread of which process
6817 reports the interrupt. Throws an error if the packet is not
6818 supported by the server. */
6821 remote_target::remote_interrupt_ns ()
6823 struct remote_state
*rs
= get_remote_state ();
6824 char *p
= rs
->buf
.data ();
6825 char *endp
= p
+ get_remote_packet_size ();
6827 xsnprintf (p
, endp
- p
, "vCtrlC");
6829 /* In non-stop, we get an immediate OK reply. The stop reply will
6830 come in asynchronously by notification. */
6832 getpkt (&rs
->buf
, 0);
6834 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6838 case PACKET_UNKNOWN
:
6839 error (_("No support for interrupting the remote target."));
6841 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
6845 /* Implement the to_stop function for the remote targets. */
6848 remote_target::stop (ptid_t ptid
)
6851 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6853 if (target_is_non_stop_p ())
6854 remote_stop_ns (ptid
);
6857 /* We don't currently have a way to transparently pause the
6858 remote target in all-stop mode. Interrupt it instead. */
6859 remote_interrupt_as ();
6863 /* Implement the to_interrupt function for the remote targets. */
6866 remote_target::interrupt ()
6869 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6871 if (target_is_non_stop_p ())
6872 remote_interrupt_ns ();
6874 remote_interrupt_as ();
6877 /* Implement the to_pass_ctrlc function for the remote targets. */
6880 remote_target::pass_ctrlc ()
6882 struct remote_state
*rs
= get_remote_state ();
6885 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6887 /* If we're starting up, we're not fully synced yet. Quit
6889 if (rs
->starting_up
)
6891 /* If ^C has already been sent once, offer to disconnect. */
6892 else if (rs
->ctrlc_pending_p
)
6895 target_interrupt ();
6898 /* Ask the user what to do when an interrupt is received. */
6901 remote_target::interrupt_query ()
6903 struct remote_state
*rs
= get_remote_state ();
6905 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6907 if (query (_("The target is not responding to interrupt requests.\n"
6908 "Stop debugging it? ")))
6910 remote_unpush_target (this);
6911 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6916 if (query (_("Interrupted while waiting for the program.\n"
6917 "Give up waiting? ")))
6922 /* Enable/disable target terminal ownership. Most targets can use
6923 terminal groups to control terminal ownership. Remote targets are
6924 different in that explicit transfer of ownership to/from GDB/target
6928 remote_target::terminal_inferior ()
6930 /* NOTE: At this point we could also register our selves as the
6931 recipient of all input. Any characters typed could then be
6932 passed on down to the target. */
6936 remote_target::terminal_ours ()
6941 remote_console_output (const char *msg
)
6945 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6948 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6952 gdb_stdtarg
->puts (tb
);
6954 gdb_stdtarg
->flush ();
6957 struct stop_reply
: public notif_event
6961 /* The identifier of the thread about this event */
6964 /* The remote state this event is associated with. When the remote
6965 connection, represented by a remote_state object, is closed,
6966 all the associated stop_reply events should be released. */
6967 struct remote_state
*rs
;
6969 struct target_waitstatus ws
;
6971 /* The architecture associated with the expedited registers. */
6974 /* Expedited registers. This makes remote debugging a bit more
6975 efficient for those targets that provide critical registers as
6976 part of their normal status mechanism (as another roundtrip to
6977 fetch them is avoided). */
6978 std::vector
<cached_reg_t
> regcache
;
6980 enum target_stop_reason stop_reason
;
6982 CORE_ADDR watch_data_address
;
6987 /* Return the length of the stop reply queue. */
6990 remote_target::stop_reply_queue_length ()
6992 remote_state
*rs
= get_remote_state ();
6993 return rs
->stop_reply_queue
.size ();
6997 remote_notif_stop_parse (remote_target
*remote
,
6998 struct notif_client
*self
, const char *buf
,
6999 struct notif_event
*event
)
7001 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
7005 remote_notif_stop_ack (remote_target
*remote
,
7006 struct notif_client
*self
, const char *buf
,
7007 struct notif_event
*event
)
7009 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
7012 putpkt (remote
, self
->ack_command
);
7014 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
7016 /* We got an unknown stop reply. */
7017 error (_("Unknown stop reply"));
7020 remote
->push_stop_reply (stop_reply
);
7024 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
7025 struct notif_client
*self
)
7027 /* We can't get pending events in remote_notif_process for
7028 notification stop, and we have to do this in remote_wait_ns
7029 instead. If we fetch all queued events from stub, remote stub
7030 may exit and we have no chance to process them back in
7032 remote_state
*rs
= remote
->get_remote_state ();
7033 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7037 stop_reply::~stop_reply ()
7039 for (cached_reg_t
®
: regcache
)
7043 static notif_event_up
7044 remote_notif_stop_alloc_reply ()
7046 return notif_event_up (new struct stop_reply ());
7049 /* A client of notification Stop. */
7051 struct notif_client notif_client_stop
=
7055 remote_notif_stop_parse
,
7056 remote_notif_stop_ack
,
7057 remote_notif_stop_can_get_pending_events
,
7058 remote_notif_stop_alloc_reply
,
7062 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
7063 the pid of the process that owns the threads we want to check, or
7064 -1 if we want to check all threads. */
7067 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
7070 if (ws
->kind
== TARGET_WAITKIND_FORKED
7071 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
7073 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
7080 /* Return the thread's pending status used to determine whether the
7081 thread is a fork parent stopped at a fork event. */
7083 static struct target_waitstatus
*
7084 thread_pending_fork_status (struct thread_info
*thread
)
7086 if (thread
->suspend
.waitstatus_pending_p
)
7087 return &thread
->suspend
.waitstatus
;
7089 return &thread
->pending_follow
;
7092 /* Determine if THREAD is a pending fork parent thread. */
7095 is_pending_fork_parent_thread (struct thread_info
*thread
)
7097 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7100 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7103 /* If CONTEXT contains any fork child threads that have not been
7104 reported yet, remove them from the CONTEXT list. If such a
7105 thread exists it is because we are stopped at a fork catchpoint
7106 and have not yet called follow_fork, which will set up the
7107 host-side data structures for the new process. */
7110 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7113 struct notif_client
*notif
= ¬if_client_stop
;
7115 /* For any threads stopped at a fork event, remove the corresponding
7116 fork child threads from the CONTEXT list. */
7117 for (thread_info
*thread
: all_non_exited_threads (this))
7119 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7121 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7122 context
->remove_thread (ws
->value
.related_pid
);
7125 /* Check for any pending fork events (not reported or processed yet)
7126 in process PID and remove those fork child threads from the
7127 CONTEXT list as well. */
7128 remote_notif_get_pending_events (notif
);
7129 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7130 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7131 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7132 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7133 context
->remove_thread (event
->ws
.value
.related_pid
);
7136 /* Check whether any event pending in the vStopped queue would prevent
7137 a global or process wildcard vCont action. Clear
7138 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7139 and clear the event inferior's may_wildcard_vcont flag if we can't
7140 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7143 remote_target::check_pending_events_prevent_wildcard_vcont
7144 (int *may_global_wildcard
)
7146 struct notif_client
*notif
= ¬if_client_stop
;
7148 remote_notif_get_pending_events (notif
);
7149 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7151 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7152 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7155 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7156 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7157 *may_global_wildcard
= 0;
7159 struct inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7161 /* This may be the first time we heard about this process.
7162 Regardless, we must not do a global wildcard resume, otherwise
7163 we'd resume this process too. */
7164 *may_global_wildcard
= 0;
7166 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7170 /* Discard all pending stop replies of inferior INF. */
7173 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7175 struct stop_reply
*reply
;
7176 struct remote_state
*rs
= get_remote_state ();
7177 struct remote_notif_state
*rns
= rs
->notif_state
;
7179 /* This function can be notified when an inferior exists. When the
7180 target is not remote, the notification state is NULL. */
7181 if (rs
->remote_desc
== NULL
)
7184 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7186 /* Discard the in-flight notification. */
7187 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7190 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
7193 /* Discard the stop replies we have already pulled with
7195 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7196 rs
->stop_reply_queue
.end (),
7197 [=] (const stop_reply_up
&event
)
7199 return event
->ptid
.pid () == inf
->pid
;
7201 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7204 /* Discard the stop replies for RS in stop_reply_queue. */
7207 remote_target::discard_pending_stop_replies_in_queue ()
7209 remote_state
*rs
= get_remote_state ();
7211 /* Discard the stop replies we have already pulled with
7213 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7214 rs
->stop_reply_queue
.end (),
7215 [=] (const stop_reply_up
&event
)
7217 return event
->rs
== rs
;
7219 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7222 /* Remove the first reply in 'stop_reply_queue' which matches
7226 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7228 remote_state
*rs
= get_remote_state ();
7230 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7231 rs
->stop_reply_queue
.end (),
7232 [=] (const stop_reply_up
&event
)
7234 return event
->ptid
.matches (ptid
);
7236 struct stop_reply
*result
;
7237 if (iter
== rs
->stop_reply_queue
.end ())
7241 result
= iter
->release ();
7242 rs
->stop_reply_queue
.erase (iter
);
7246 fprintf_unfiltered (gdb_stdlog
,
7247 "notif: discard queued event: 'Stop' in %s\n",
7248 target_pid_to_str (ptid
).c_str ());
7253 /* Look for a queued stop reply belonging to PTID. If one is found,
7254 remove it from the queue, and return it. Returns NULL if none is
7255 found. If there are still queued events left to process, tell the
7256 event loop to get back to target_wait soon. */
7259 remote_target::queued_stop_reply (ptid_t ptid
)
7261 remote_state
*rs
= get_remote_state ();
7262 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7264 if (!rs
->stop_reply_queue
.empty ())
7266 /* There's still at least an event left. */
7267 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7273 /* Push a fully parsed stop reply in the stop reply queue. Since we
7274 know that we now have at least one queued event left to pass to the
7275 core side, tell the event loop to get back to target_wait soon. */
7278 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7280 remote_state
*rs
= get_remote_state ();
7281 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7284 fprintf_unfiltered (gdb_stdlog
,
7285 "notif: push 'Stop' %s to queue %d\n",
7286 target_pid_to_str (new_event
->ptid
).c_str (),
7287 int (rs
->stop_reply_queue
.size ()));
7289 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7292 /* Returns true if we have a stop reply for PTID. */
7295 remote_target::peek_stop_reply (ptid_t ptid
)
7297 remote_state
*rs
= get_remote_state ();
7298 for (auto &event
: rs
->stop_reply_queue
)
7299 if (ptid
== event
->ptid
7300 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7305 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7306 starting with P and ending with PEND matches PREFIX. */
7309 strprefix (const char *p
, const char *pend
, const char *prefix
)
7311 for ( ; p
< pend
; p
++, prefix
++)
7314 return *prefix
== '\0';
7317 /* Parse the stop reply in BUF. Either the function succeeds, and the
7318 result is stored in EVENT, or throws an error. */
7321 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7323 remote_arch_state
*rsa
= NULL
;
7328 event
->ptid
= null_ptid
;
7329 event
->rs
= get_remote_state ();
7330 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7331 event
->ws
.value
.integer
= 0;
7332 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7333 event
->regcache
.clear ();
7338 case 'T': /* Status with PC, SP, FP, ... */
7339 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7340 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7342 n... = register number
7343 r... = register contents
7346 p
= &buf
[3]; /* after Txx */
7352 p1
= strchr (p
, ':');
7354 error (_("Malformed packet(a) (missing colon): %s\n\
7358 error (_("Malformed packet(a) (missing register number): %s\n\
7362 /* Some "registers" are actually extended stop information.
7363 Note if you're adding a new entry here: GDB 7.9 and
7364 earlier assume that all register "numbers" that start
7365 with an hex digit are real register numbers. Make sure
7366 the server only sends such a packet if it knows the
7367 client understands it. */
7369 if (strprefix (p
, p1
, "thread"))
7370 event
->ptid
= read_ptid (++p1
, &p
);
7371 else if (strprefix (p
, p1
, "syscall_entry"))
7375 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7376 p
= unpack_varlen_hex (++p1
, &sysno
);
7377 event
->ws
.value
.syscall_number
= (int) sysno
;
7379 else if (strprefix (p
, p1
, "syscall_return"))
7383 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7384 p
= unpack_varlen_hex (++p1
, &sysno
);
7385 event
->ws
.value
.syscall_number
= (int) sysno
;
7387 else if (strprefix (p
, p1
, "watch")
7388 || strprefix (p
, p1
, "rwatch")
7389 || strprefix (p
, p1
, "awatch"))
7391 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7392 p
= unpack_varlen_hex (++p1
, &addr
);
7393 event
->watch_data_address
= (CORE_ADDR
) addr
;
7395 else if (strprefix (p
, p1
, "swbreak"))
7397 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7399 /* Make sure the stub doesn't forget to indicate support
7401 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7402 error (_("Unexpected swbreak stop reason"));
7404 /* The value part is documented as "must be empty",
7405 though we ignore it, in case we ever decide to make
7406 use of it in a backward compatible way. */
7407 p
= strchrnul (p1
+ 1, ';');
7409 else if (strprefix (p
, p1
, "hwbreak"))
7411 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7413 /* Make sure the stub doesn't forget to indicate support
7415 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7416 error (_("Unexpected hwbreak stop reason"));
7419 p
= strchrnul (p1
+ 1, ';');
7421 else if (strprefix (p
, p1
, "library"))
7423 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7424 p
= strchrnul (p1
+ 1, ';');
7426 else if (strprefix (p
, p1
, "replaylog"))
7428 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7429 /* p1 will indicate "begin" or "end", but it makes
7430 no difference for now, so ignore it. */
7431 p
= strchrnul (p1
+ 1, ';');
7433 else if (strprefix (p
, p1
, "core"))
7437 p
= unpack_varlen_hex (++p1
, &c
);
7440 else if (strprefix (p
, p1
, "fork"))
7442 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7443 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7445 else if (strprefix (p
, p1
, "vfork"))
7447 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7448 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7450 else if (strprefix (p
, p1
, "vforkdone"))
7452 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7453 p
= strchrnul (p1
+ 1, ';');
7455 else if (strprefix (p
, p1
, "exec"))
7460 /* Determine the length of the execd pathname. */
7461 p
= unpack_varlen_hex (++p1
, &ignored
);
7462 pathlen
= (p
- p1
) / 2;
7464 /* Save the pathname for event reporting and for
7465 the next run command. */
7466 gdb::unique_xmalloc_ptr
<char[]> pathname
7467 ((char *) xmalloc (pathlen
+ 1));
7468 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7469 pathname
[pathlen
] = '\0';
7471 /* This is freed during event handling. */
7472 event
->ws
.value
.execd_pathname
= pathname
.release ();
7473 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7475 /* Skip the registers included in this packet, since
7476 they may be for an architecture different from the
7477 one used by the original program. */
7480 else if (strprefix (p
, p1
, "create"))
7482 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7483 p
= strchrnul (p1
+ 1, ';');
7492 p
= strchrnul (p1
+ 1, ';');
7497 /* Maybe a real ``P'' register number. */
7498 p_temp
= unpack_varlen_hex (p
, &pnum
);
7499 /* If the first invalid character is the colon, we got a
7500 register number. Otherwise, it's an unknown stop
7504 /* If we haven't parsed the event's thread yet, find
7505 it now, in order to find the architecture of the
7506 reported expedited registers. */
7507 if (event
->ptid
== null_ptid
)
7509 /* If there is no thread-id information then leave
7510 the event->ptid as null_ptid. Later in
7511 process_stop_reply we will pick a suitable
7513 const char *thr
= strstr (p1
+ 1, ";thread:");
7515 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7522 = (event
->ptid
== null_ptid
7524 : find_inferior_ptid (this, event
->ptid
));
7525 /* If this is the first time we learn anything
7526 about this process, skip the registers
7527 included in this packet, since we don't yet
7528 know which architecture to use to parse them.
7529 We'll determine the architecture later when
7530 we process the stop reply and retrieve the
7531 target description, via
7532 remote_notice_new_inferior ->
7533 post_create_inferior. */
7536 p
= strchrnul (p1
+ 1, ';');
7541 event
->arch
= inf
->gdbarch
;
7542 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7546 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7547 cached_reg_t cached_reg
;
7550 error (_("Remote sent bad register number %s: %s\n\
7552 hex_string (pnum
), p
, buf
);
7554 cached_reg
.num
= reg
->regnum
;
7555 cached_reg
.data
= (gdb_byte
*)
7556 xmalloc (register_size (event
->arch
, reg
->regnum
));
7559 fieldsize
= hex2bin (p
, cached_reg
.data
,
7560 register_size (event
->arch
, reg
->regnum
));
7562 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7563 warning (_("Remote reply is too short: %s"), buf
);
7565 event
->regcache
.push_back (cached_reg
);
7569 /* Not a number. Silently skip unknown optional
7571 p
= strchrnul (p1
+ 1, ';');
7576 error (_("Remote register badly formatted: %s\nhere: %s"),
7581 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7585 case 'S': /* Old style status, just signal only. */
7589 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7590 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7591 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7592 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7594 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7597 case 'w': /* Thread exited. */
7601 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7602 p
= unpack_varlen_hex (&buf
[1], &value
);
7603 event
->ws
.value
.integer
= value
;
7605 error (_("stop reply packet badly formatted: %s"), buf
);
7606 event
->ptid
= read_ptid (++p
, NULL
);
7609 case 'W': /* Target exited. */
7614 /* GDB used to accept only 2 hex chars here. Stubs should
7615 only send more if they detect GDB supports multi-process
7617 p
= unpack_varlen_hex (&buf
[1], &value
);
7621 /* The remote process exited. */
7622 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7623 event
->ws
.value
.integer
= value
;
7627 /* The remote process exited with a signal. */
7628 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7629 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7630 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7632 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7635 /* If no process is specified, return null_ptid, and let the
7636 caller figure out the right process to use. */
7646 else if (startswith (p
, "process:"))
7650 p
+= sizeof ("process:") - 1;
7651 unpack_varlen_hex (p
, &upid
);
7655 error (_("unknown stop reply packet: %s"), buf
);
7658 error (_("unknown stop reply packet: %s"), buf
);
7659 event
->ptid
= ptid_t (pid
);
7663 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7664 event
->ptid
= minus_one_ptid
;
7669 /* When the stub wants to tell GDB about a new notification reply, it
7670 sends a notification (%Stop, for example). Those can come it at
7671 any time, hence, we have to make sure that any pending
7672 putpkt/getpkt sequence we're making is finished, before querying
7673 the stub for more events with the corresponding ack command
7674 (vStopped, for example). E.g., if we started a vStopped sequence
7675 immediately upon receiving the notification, something like this
7683 1.6) <-- (registers reply to step #1.3)
7685 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7688 To solve this, whenever we parse a %Stop notification successfully,
7689 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7690 doing whatever we were doing:
7696 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7697 2.5) <-- (registers reply to step #2.3)
7699 Eventually after step #2.5, we return to the event loop, which
7700 notices there's an event on the
7701 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7702 associated callback --- the function below. At this point, we're
7703 always safe to start a vStopped sequence. :
7706 2.7) <-- T05 thread:2
7712 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7714 struct remote_state
*rs
= get_remote_state ();
7716 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7719 fprintf_unfiltered (gdb_stdlog
,
7720 "notif: process: '%s' ack pending event\n",
7724 nc
->ack (this, nc
, rs
->buf
.data (),
7725 rs
->notif_state
->pending_event
[nc
->id
]);
7726 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7730 getpkt (&rs
->buf
, 0);
7731 if (strcmp (rs
->buf
.data (), "OK") == 0)
7734 remote_notif_ack (this, nc
, rs
->buf
.data ());
7740 fprintf_unfiltered (gdb_stdlog
,
7741 "notif: process: '%s' no pending reply\n",
7746 /* Wrapper around remote_target::remote_notif_get_pending_events to
7747 avoid having to export the whole remote_target class. */
7750 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7752 remote
->remote_notif_get_pending_events (nc
);
7755 /* Called from process_stop_reply when the stop packet we are responding
7756 to didn't include a process-id or thread-id. STATUS is the stop event
7757 we are responding to.
7759 It is the task of this function to select a suitable thread (or process)
7760 and return its ptid, this is the thread (or process) we will assume the
7761 stop event came from.
7763 In some cases there isn't really any choice about which thread (or
7764 process) is selected, a basic remote with a single process containing a
7765 single thread might choose not to send any process-id or thread-id in
7766 its stop packets, this function will select and return the one and only
7769 However, if a target supports multiple threads (or processes) and still
7770 doesn't include a thread-id (or process-id) in its stop packet then
7771 first, this is a badly behaving target, and second, we're going to have
7772 to select a thread (or process) at random and use that. This function
7773 will print a warning to the user if it detects that there is the
7774 possibility that GDB is guessing which thread (or process) to
7777 Note that this is called before GDB fetches the updated thread list from the
7778 target. So it's possible for the stop reply to be ambiguous and for GDB to
7779 not realize it. For example, if there's initially one thread, the target
7780 spawns a second thread, and then sends a stop reply without an id that
7781 concerns the first thread. GDB will assume the stop reply is about the
7782 first thread - the only thread it knows about - without printing a warning.
7783 Anyway, if the remote meant for the stop reply to be about the second thread,
7784 then it would be really broken, because GDB doesn't know about that thread
7788 remote_target::select_thread_for_ambiguous_stop_reply
7789 (const struct target_waitstatus
*status
)
7791 /* Some stop events apply to all threads in an inferior, while others
7792 only apply to a single thread. */
7793 bool process_wide_stop
7794 = (status
->kind
== TARGET_WAITKIND_EXITED
7795 || status
->kind
== TARGET_WAITKIND_SIGNALLED
);
7797 thread_info
*first_resumed_thread
= nullptr;
7798 bool ambiguous
= false;
7800 /* Consider all non-exited threads of the target, find the first resumed
7802 for (thread_info
*thr
: all_non_exited_threads (this))
7804 remote_thread_info
*remote_thr
= get_remote_thread_info (thr
);
7806 if (remote_thr
->resume_state () != resume_state::RESUMED
)
7809 if (first_resumed_thread
== nullptr)
7810 first_resumed_thread
= thr
;
7811 else if (!process_wide_stop
7812 || first_resumed_thread
->ptid
.pid () != thr
->ptid
.pid ())
7816 gdb_assert (first_resumed_thread
!= nullptr);
7818 /* Warn if the remote target is sending ambiguous stop replies. */
7821 static bool warned
= false;
7825 /* If you are seeing this warning then the remote target has
7826 stopped without specifying a thread-id, but the target
7827 does have multiple threads (or inferiors), and so GDB is
7828 having to guess which thread stopped.
7830 Examples of what might cause this are the target sending
7831 and 'S' stop packet, or a 'T' stop packet and not
7832 including a thread-id.
7834 Additionally, the target might send a 'W' or 'X packet
7835 without including a process-id, when the target has
7836 multiple running inferiors. */
7837 if (process_wide_stop
)
7838 warning (_("multi-inferior target stopped without "
7839 "sending a process-id, using first "
7840 "non-exited inferior"));
7842 warning (_("multi-threaded target stopped without "
7843 "sending a thread-id, using first "
7844 "non-exited thread"));
7849 /* If this is a stop for all threads then don't use a particular threads
7850 ptid, instead create a new ptid where only the pid field is set. */
7851 if (process_wide_stop
)
7852 return ptid_t (first_resumed_thread
->ptid
.pid ());
7854 return first_resumed_thread
->ptid
;
7857 /* Called when it is decided that STOP_REPLY holds the info of the
7858 event that is to be returned to the core. This function always
7859 destroys STOP_REPLY. */
7862 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
7863 struct target_waitstatus
*status
)
7865 *status
= stop_reply
->ws
;
7866 ptid_t ptid
= stop_reply
->ptid
;
7868 /* If no thread/process was reported by the stub then select a suitable
7870 if (ptid
== null_ptid
)
7871 ptid
= select_thread_for_ambiguous_stop_reply (status
);
7872 gdb_assert (ptid
!= null_ptid
);
7874 if (status
->kind
!= TARGET_WAITKIND_EXITED
7875 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7876 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7878 /* Expedited registers. */
7879 if (!stop_reply
->regcache
.empty ())
7881 struct regcache
*regcache
7882 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
7884 for (cached_reg_t
®
: stop_reply
->regcache
)
7886 regcache
->raw_supply (reg
.num
, reg
.data
);
7890 stop_reply
->regcache
.clear ();
7893 remote_notice_new_inferior (ptid
, 0);
7894 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
7895 remote_thr
->core
= stop_reply
->core
;
7896 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7897 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7899 if (target_is_non_stop_p ())
7901 /* If the target works in non-stop mode, a stop-reply indicates that
7902 only this thread stopped. */
7903 remote_thr
->set_not_resumed ();
7907 /* If the target works in all-stop mode, a stop-reply indicates that
7908 all the target's threads stopped. */
7909 for (thread_info
*tp
: all_non_exited_threads (this))
7910 get_remote_thread_info (tp
)->set_not_resumed ();
7918 /* The non-stop mode version of target_wait. */
7921 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
7922 target_wait_flags options
)
7924 struct remote_state
*rs
= get_remote_state ();
7925 struct stop_reply
*stop_reply
;
7929 /* If in non-stop mode, get out of getpkt even if a
7930 notification is received. */
7932 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
7935 if (ret
!= -1 && !is_notif
)
7938 case 'E': /* Error of some sort. */
7939 /* We're out of sync with the target now. Did it continue
7940 or not? We can't tell which thread it was in non-stop,
7941 so just ignore this. */
7942 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
7944 case 'O': /* Console output. */
7945 remote_console_output (&rs
->buf
[1]);
7948 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
7952 /* Acknowledge a pending stop reply that may have arrived in the
7954 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7955 remote_notif_get_pending_events (¬if_client_stop
);
7957 /* If indeed we noticed a stop reply, we're done. */
7958 stop_reply
= queued_stop_reply (ptid
);
7959 if (stop_reply
!= NULL
)
7960 return process_stop_reply (stop_reply
, status
);
7962 /* Still no event. If we're just polling for an event, then
7963 return to the event loop. */
7964 if (options
& TARGET_WNOHANG
)
7966 status
->kind
= TARGET_WAITKIND_IGNORE
;
7967 return minus_one_ptid
;
7970 /* Otherwise do a blocking wait. */
7971 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
7975 /* Return the first resumed thread. */
7978 first_remote_resumed_thread (remote_target
*target
)
7980 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
7986 /* Wait until the remote machine stops, then return, storing status in
7987 STATUS just as `wait' would. */
7990 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
,
7991 target_wait_flags options
)
7993 struct remote_state
*rs
= get_remote_state ();
7994 ptid_t event_ptid
= null_ptid
;
7996 struct stop_reply
*stop_reply
;
8000 status
->kind
= TARGET_WAITKIND_IGNORE
;
8001 status
->value
.integer
= 0;
8003 stop_reply
= queued_stop_reply (ptid
);
8004 if (stop_reply
!= NULL
)
8005 return process_stop_reply (stop_reply
, status
);
8007 if (rs
->cached_wait_status
)
8008 /* Use the cached wait status, but only once. */
8009 rs
->cached_wait_status
= 0;
8014 int forever
= ((options
& TARGET_WNOHANG
) == 0
8015 && rs
->wait_forever_enabled_p
);
8017 if (!rs
->waiting_for_stop_reply
)
8019 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
8020 return minus_one_ptid
;
8023 /* FIXME: cagney/1999-09-27: If we're in async mode we should
8024 _never_ wait for ever -> test on target_is_async_p().
8025 However, before we do that we need to ensure that the caller
8026 knows how to take the target into/out of async mode. */
8027 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
8029 /* GDB gets a notification. Return to core as this event is
8031 if (ret
!= -1 && is_notif
)
8032 return minus_one_ptid
;
8034 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
8035 return minus_one_ptid
;
8038 buf
= rs
->buf
.data ();
8040 /* Assume that the target has acknowledged Ctrl-C unless we receive
8041 an 'F' or 'O' packet. */
8042 if (buf
[0] != 'F' && buf
[0] != 'O')
8043 rs
->ctrlc_pending_p
= 0;
8047 case 'E': /* Error of some sort. */
8048 /* We're out of sync with the target now. Did it continue or
8049 not? Not is more likely, so report a stop. */
8050 rs
->waiting_for_stop_reply
= 0;
8052 warning (_("Remote failure reply: %s"), buf
);
8053 status
->kind
= TARGET_WAITKIND_STOPPED
;
8054 status
->value
.sig
= GDB_SIGNAL_0
;
8056 case 'F': /* File-I/O request. */
8057 /* GDB may access the inferior memory while handling the File-I/O
8058 request, but we don't want GDB accessing memory while waiting
8059 for a stop reply. See the comments in putpkt_binary. Set
8060 waiting_for_stop_reply to 0 temporarily. */
8061 rs
->waiting_for_stop_reply
= 0;
8062 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
8063 rs
->ctrlc_pending_p
= 0;
8064 /* GDB handled the File-I/O request, and the target is running
8065 again. Keep waiting for events. */
8066 rs
->waiting_for_stop_reply
= 1;
8068 case 'N': case 'T': case 'S': case 'X': case 'W':
8070 /* There is a stop reply to handle. */
8071 rs
->waiting_for_stop_reply
= 0;
8074 = (struct stop_reply
*) remote_notif_parse (this,
8078 event_ptid
= process_stop_reply (stop_reply
, status
);
8081 case 'O': /* Console output. */
8082 remote_console_output (buf
+ 1);
8085 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
8087 /* Zero length reply means that we tried 'S' or 'C' and the
8088 remote system doesn't support it. */
8089 target_terminal::ours_for_output ();
8091 ("Can't send signals to this remote system. %s not sent.\n",
8092 gdb_signal_to_name (rs
->last_sent_signal
));
8093 rs
->last_sent_signal
= GDB_SIGNAL_0
;
8094 target_terminal::inferior ();
8096 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
8102 warning (_("Invalid remote reply: %s"), buf
);
8106 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
8107 return minus_one_ptid
;
8108 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
8110 /* Nothing interesting happened. If we're doing a non-blocking
8111 poll, we're done. Otherwise, go back to waiting. */
8112 if (options
& TARGET_WNOHANG
)
8113 return minus_one_ptid
;
8117 else if (status
->kind
!= TARGET_WAITKIND_EXITED
8118 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
8120 if (event_ptid
!= null_ptid
)
8121 record_currthread (rs
, event_ptid
);
8123 event_ptid
= first_remote_resumed_thread (this);
8127 /* A process exit. Invalidate our notion of current thread. */
8128 record_currthread (rs
, minus_one_ptid
);
8129 /* It's possible that the packet did not include a pid. */
8130 if (event_ptid
== null_ptid
)
8131 event_ptid
= first_remote_resumed_thread (this);
8132 /* EVENT_PTID could still be NULL_PTID. Double-check. */
8133 if (event_ptid
== null_ptid
)
8134 event_ptid
= magic_null_ptid
;
8140 /* Wait until the remote machine stops, then return, storing status in
8141 STATUS just as `wait' would. */
8144 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
,
8145 target_wait_flags options
)
8149 if (target_is_non_stop_p ())
8150 event_ptid
= wait_ns (ptid
, status
, options
);
8152 event_ptid
= wait_as (ptid
, status
, options
);
8154 if (target_is_async_p ())
8156 remote_state
*rs
= get_remote_state ();
8158 /* If there are are events left in the queue tell the event loop
8160 if (!rs
->stop_reply_queue
.empty ())
8161 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
8167 /* Fetch a single register using a 'p' packet. */
8170 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8173 struct gdbarch
*gdbarch
= regcache
->arch ();
8174 struct remote_state
*rs
= get_remote_state ();
8176 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8179 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8182 if (reg
->pnum
== -1)
8185 p
= rs
->buf
.data ();
8187 p
+= hexnumstr (p
, reg
->pnum
);
8190 getpkt (&rs
->buf
, 0);
8192 buf
= rs
->buf
.data ();
8194 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8198 case PACKET_UNKNOWN
:
8201 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8202 gdbarch_register_name (regcache
->arch (),
8207 /* If this register is unfetchable, tell the regcache. */
8210 regcache
->raw_supply (reg
->regnum
, NULL
);
8214 /* Otherwise, parse and supply the value. */
8220 error (_("fetch_register_using_p: early buf termination"));
8222 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8225 regcache
->raw_supply (reg
->regnum
, regp
);
8229 /* Fetch the registers included in the target's 'g' packet. */
8232 remote_target::send_g_packet ()
8234 struct remote_state
*rs
= get_remote_state ();
8237 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8239 getpkt (&rs
->buf
, 0);
8240 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8241 error (_("Could not read registers; remote failure reply '%s'"),
8244 /* We can get out of synch in various cases. If the first character
8245 in the buffer is not a hex character, assume that has happened
8246 and try to fetch another packet to read. */
8247 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8248 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8249 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8250 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8253 fprintf_unfiltered (gdb_stdlog
,
8254 "Bad register packet; fetching a new packet\n");
8255 getpkt (&rs
->buf
, 0);
8258 buf_len
= strlen (rs
->buf
.data ());
8260 /* Sanity check the received packet. */
8261 if (buf_len
% 2 != 0)
8262 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8268 remote_target::process_g_packet (struct regcache
*regcache
)
8270 struct gdbarch
*gdbarch
= regcache
->arch ();
8271 struct remote_state
*rs
= get_remote_state ();
8272 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8277 buf_len
= strlen (rs
->buf
.data ());
8279 /* Further sanity checks, with knowledge of the architecture. */
8280 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8281 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8283 rsa
->sizeof_g_packet
, buf_len
/ 2,
8286 /* Save the size of the packet sent to us by the target. It is used
8287 as a heuristic when determining the max size of packets that the
8288 target can safely receive. */
8289 if (rsa
->actual_register_packet_size
== 0)
8290 rsa
->actual_register_packet_size
= buf_len
;
8292 /* If this is smaller than we guessed the 'g' packet would be,
8293 update our records. A 'g' reply that doesn't include a register's
8294 value implies either that the register is not available, or that
8295 the 'p' packet must be used. */
8296 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8298 long sizeof_g_packet
= buf_len
/ 2;
8300 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8302 long offset
= rsa
->regs
[i
].offset
;
8303 long reg_size
= register_size (gdbarch
, i
);
8305 if (rsa
->regs
[i
].pnum
== -1)
8308 if (offset
>= sizeof_g_packet
)
8309 rsa
->regs
[i
].in_g_packet
= 0;
8310 else if (offset
+ reg_size
> sizeof_g_packet
)
8311 error (_("Truncated register %d in remote 'g' packet"), i
);
8313 rsa
->regs
[i
].in_g_packet
= 1;
8316 /* Looks valid enough, we can assume this is the correct length
8317 for a 'g' packet. It's important not to adjust
8318 rsa->sizeof_g_packet if we have truncated registers otherwise
8319 this "if" won't be run the next time the method is called
8320 with a packet of the same size and one of the internal errors
8321 below will trigger instead. */
8322 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8325 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8327 /* Unimplemented registers read as all bits zero. */
8328 memset (regs
, 0, rsa
->sizeof_g_packet
);
8330 /* Reply describes registers byte by byte, each byte encoded as two
8331 hex characters. Suck them all up, then supply them to the
8332 register cacheing/storage mechanism. */
8334 p
= rs
->buf
.data ();
8335 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8337 if (p
[0] == 0 || p
[1] == 0)
8338 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8339 internal_error (__FILE__
, __LINE__
,
8340 _("unexpected end of 'g' packet reply"));
8342 if (p
[0] == 'x' && p
[1] == 'x')
8343 regs
[i
] = 0; /* 'x' */
8345 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8349 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8351 struct packet_reg
*r
= &rsa
->regs
[i
];
8352 long reg_size
= register_size (gdbarch
, i
);
8356 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8357 /* This shouldn't happen - we adjusted in_g_packet above. */
8358 internal_error (__FILE__
, __LINE__
,
8359 _("unexpected end of 'g' packet reply"));
8360 else if (rs
->buf
[r
->offset
* 2] == 'x')
8362 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8363 /* The register isn't available, mark it as such (at
8364 the same time setting the value to zero). */
8365 regcache
->raw_supply (r
->regnum
, NULL
);
8368 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8374 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8377 process_g_packet (regcache
);
8380 /* Make the remote selected traceframe match GDB's selected
8384 remote_target::set_remote_traceframe ()
8387 struct remote_state
*rs
= get_remote_state ();
8389 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8392 /* Avoid recursion, remote_trace_find calls us again. */
8393 rs
->remote_traceframe_number
= get_traceframe_number ();
8395 newnum
= target_trace_find (tfind_number
,
8396 get_traceframe_number (), 0, 0, NULL
);
8398 /* Should not happen. If it does, all bets are off. */
8399 if (newnum
!= get_traceframe_number ())
8400 warning (_("could not set remote traceframe"));
8404 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8406 struct gdbarch
*gdbarch
= regcache
->arch ();
8407 struct remote_state
*rs
= get_remote_state ();
8408 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8411 set_remote_traceframe ();
8412 set_general_thread (regcache
->ptid ());
8416 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8418 gdb_assert (reg
!= NULL
);
8420 /* If this register might be in the 'g' packet, try that first -
8421 we are likely to read more than one register. If this is the
8422 first 'g' packet, we might be overly optimistic about its
8423 contents, so fall back to 'p'. */
8424 if (reg
->in_g_packet
)
8426 fetch_registers_using_g (regcache
);
8427 if (reg
->in_g_packet
)
8431 if (fetch_register_using_p (regcache
, reg
))
8434 /* This register is not available. */
8435 regcache
->raw_supply (reg
->regnum
, NULL
);
8440 fetch_registers_using_g (regcache
);
8442 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8443 if (!rsa
->regs
[i
].in_g_packet
)
8444 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8446 /* This register is not available. */
8447 regcache
->raw_supply (i
, NULL
);
8451 /* Prepare to store registers. Since we may send them all (using a
8452 'G' request), we have to read out the ones we don't want to change
8456 remote_target::prepare_to_store (struct regcache
*regcache
)
8458 struct remote_state
*rs
= get_remote_state ();
8459 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8462 /* Make sure the entire registers array is valid. */
8463 switch (packet_support (PACKET_P
))
8465 case PACKET_DISABLE
:
8466 case PACKET_SUPPORT_UNKNOWN
:
8467 /* Make sure all the necessary registers are cached. */
8468 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8469 if (rsa
->regs
[i
].in_g_packet
)
8470 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8477 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8478 packet was not recognized. */
8481 remote_target::store_register_using_P (const struct regcache
*regcache
,
8484 struct gdbarch
*gdbarch
= regcache
->arch ();
8485 struct remote_state
*rs
= get_remote_state ();
8486 /* Try storing a single register. */
8487 char *buf
= rs
->buf
.data ();
8488 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8491 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8494 if (reg
->pnum
== -1)
8497 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8498 p
= buf
+ strlen (buf
);
8499 regcache
->raw_collect (reg
->regnum
, regp
);
8500 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8502 getpkt (&rs
->buf
, 0);
8504 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8509 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8510 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8511 case PACKET_UNKNOWN
:
8514 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8518 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8519 contents of the register cache buffer. FIXME: ignores errors. */
8522 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8524 struct remote_state
*rs
= get_remote_state ();
8525 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8529 /* Extract all the registers in the regcache copying them into a
8534 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8535 memset (regs
, 0, rsa
->sizeof_g_packet
);
8536 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8538 struct packet_reg
*r
= &rsa
->regs
[i
];
8541 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8545 /* Command describes registers byte by byte,
8546 each byte encoded as two hex characters. */
8547 p
= rs
->buf
.data ();
8549 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8551 getpkt (&rs
->buf
, 0);
8552 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8553 error (_("Could not write registers; remote failure reply '%s'"),
8557 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8558 of the register cache buffer. FIXME: ignores errors. */
8561 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8563 struct gdbarch
*gdbarch
= regcache
->arch ();
8564 struct remote_state
*rs
= get_remote_state ();
8565 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8568 set_remote_traceframe ();
8569 set_general_thread (regcache
->ptid ());
8573 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8575 gdb_assert (reg
!= NULL
);
8577 /* Always prefer to store registers using the 'P' packet if
8578 possible; we often change only a small number of registers.
8579 Sometimes we change a larger number; we'd need help from a
8580 higher layer to know to use 'G'. */
8581 if (store_register_using_P (regcache
, reg
))
8584 /* For now, don't complain if we have no way to write the
8585 register. GDB loses track of unavailable registers too
8586 easily. Some day, this may be an error. We don't have
8587 any way to read the register, either... */
8588 if (!reg
->in_g_packet
)
8591 store_registers_using_G (regcache
);
8595 store_registers_using_G (regcache
);
8597 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8598 if (!rsa
->regs
[i
].in_g_packet
)
8599 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8600 /* See above for why we do not issue an error here. */
8605 /* Return the number of hex digits in num. */
8608 hexnumlen (ULONGEST num
)
8612 for (i
= 0; num
!= 0; i
++)
8615 return std::max (i
, 1);
8618 /* Set BUF to the minimum number of hex digits representing NUM. */
8621 hexnumstr (char *buf
, ULONGEST num
)
8623 int len
= hexnumlen (num
);
8625 return hexnumnstr (buf
, num
, len
);
8629 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8632 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8638 for (i
= width
- 1; i
>= 0; i
--)
8640 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8647 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8650 remote_address_masked (CORE_ADDR addr
)
8652 unsigned int address_size
= remote_address_size
;
8654 /* If "remoteaddresssize" was not set, default to target address size. */
8656 address_size
= gdbarch_addr_bit (target_gdbarch ());
8658 if (address_size
> 0
8659 && address_size
< (sizeof (ULONGEST
) * 8))
8661 /* Only create a mask when that mask can safely be constructed
8662 in a ULONGEST variable. */
8665 mask
= (mask
<< address_size
) - 1;
8671 /* Determine whether the remote target supports binary downloading.
8672 This is accomplished by sending a no-op memory write of zero length
8673 to the target at the specified address. It does not suffice to send
8674 the whole packet, since many stubs strip the eighth bit and
8675 subsequently compute a wrong checksum, which causes real havoc with
8678 NOTE: This can still lose if the serial line is not eight-bit
8679 clean. In cases like this, the user should clear "remote
8683 remote_target::check_binary_download (CORE_ADDR addr
)
8685 struct remote_state
*rs
= get_remote_state ();
8687 switch (packet_support (PACKET_X
))
8689 case PACKET_DISABLE
:
8693 case PACKET_SUPPORT_UNKNOWN
:
8697 p
= rs
->buf
.data ();
8699 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8701 p
+= hexnumstr (p
, (ULONGEST
) 0);
8705 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8706 getpkt (&rs
->buf
, 0);
8708 if (rs
->buf
[0] == '\0')
8711 fprintf_unfiltered (gdb_stdlog
,
8712 "binary downloading NOT "
8713 "supported by target\n");
8714 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8719 fprintf_unfiltered (gdb_stdlog
,
8720 "binary downloading supported by target\n");
8721 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8728 /* Helper function to resize the payload in order to try to get a good
8729 alignment. We try to write an amount of data such that the next write will
8730 start on an address aligned on REMOTE_ALIGN_WRITES. */
8733 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8735 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8738 /* Write memory data directly to the remote machine.
8739 This does not inform the data cache; the data cache uses this.
8740 HEADER is the starting part of the packet.
8741 MEMADDR is the address in the remote memory space.
8742 MYADDR is the address of the buffer in our space.
8743 LEN_UNITS is the number of addressable units to write.
8744 UNIT_SIZE is the length in bytes of an addressable unit.
8745 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8746 should send data as binary ('X'), or hex-encoded ('M').
8748 The function creates packet of the form
8749 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8751 where encoding of <DATA> is terminated by PACKET_FORMAT.
8753 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8756 Return the transferred status, error or OK (an
8757 'enum target_xfer_status' value). Save the number of addressable units
8758 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8760 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8761 exchange between gdb and the stub could look like (?? in place of the
8767 -> $M1000,3:eeeeffffeeee#??
8771 <- eeeeffffeeeedddd */
8774 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8775 const gdb_byte
*myaddr
,
8778 ULONGEST
*xfered_len_units
,
8779 char packet_format
, int use_length
)
8781 struct remote_state
*rs
= get_remote_state ();
8787 int payload_capacity_bytes
;
8788 int payload_length_bytes
;
8790 if (packet_format
!= 'X' && packet_format
!= 'M')
8791 internal_error (__FILE__
, __LINE__
,
8792 _("remote_write_bytes_aux: bad packet format"));
8795 return TARGET_XFER_EOF
;
8797 payload_capacity_bytes
= get_memory_write_packet_size ();
8799 /* The packet buffer will be large enough for the payload;
8800 get_memory_packet_size ensures this. */
8803 /* Compute the size of the actual payload by subtracting out the
8804 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8806 payload_capacity_bytes
-= strlen ("$,:#NN");
8808 /* The comma won't be used. */
8809 payload_capacity_bytes
+= 1;
8810 payload_capacity_bytes
-= strlen (header
);
8811 payload_capacity_bytes
-= hexnumlen (memaddr
);
8813 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8815 strcat (rs
->buf
.data (), header
);
8816 p
= rs
->buf
.data () + strlen (header
);
8818 /* Compute a best guess of the number of bytes actually transfered. */
8819 if (packet_format
== 'X')
8821 /* Best guess at number of bytes that will fit. */
8822 todo_units
= std::min (len_units
,
8823 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8825 payload_capacity_bytes
-= hexnumlen (todo_units
);
8826 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8830 /* Number of bytes that will fit. */
8832 = std::min (len_units
,
8833 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8835 payload_capacity_bytes
-= hexnumlen (todo_units
);
8836 todo_units
= std::min (todo_units
,
8837 (payload_capacity_bytes
/ unit_size
) / 2);
8840 if (todo_units
<= 0)
8841 internal_error (__FILE__
, __LINE__
,
8842 _("minimum packet size too small to write data"));
8844 /* If we already need another packet, then try to align the end
8845 of this packet to a useful boundary. */
8846 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8847 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8849 /* Append "<memaddr>". */
8850 memaddr
= remote_address_masked (memaddr
);
8851 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8858 /* Append the length and retain its location and size. It may need to be
8859 adjusted once the packet body has been created. */
8861 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8869 /* Append the packet body. */
8870 if (packet_format
== 'X')
8872 /* Binary mode. Send target system values byte by byte, in
8873 increasing byte addresses. Only escape certain critical
8875 payload_length_bytes
=
8876 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8877 &units_written
, payload_capacity_bytes
);
8879 /* If not all TODO units fit, then we'll need another packet. Make
8880 a second try to keep the end of the packet aligned. Don't do
8881 this if the packet is tiny. */
8882 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8886 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8888 if (new_todo_units
!= units_written
)
8889 payload_length_bytes
=
8890 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8891 (gdb_byte
*) p
, &units_written
,
8892 payload_capacity_bytes
);
8895 p
+= payload_length_bytes
;
8896 if (use_length
&& units_written
< todo_units
)
8898 /* Escape chars have filled up the buffer prematurely,
8899 and we have actually sent fewer units than planned.
8900 Fix-up the length field of the packet. Use the same
8901 number of characters as before. */
8902 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8904 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8909 /* Normal mode: Send target system values byte by byte, in
8910 increasing byte addresses. Each byte is encoded as a two hex
8912 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8913 units_written
= todo_units
;
8916 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8917 getpkt (&rs
->buf
, 0);
8919 if (rs
->buf
[0] == 'E')
8920 return TARGET_XFER_E_IO
;
8922 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8923 send fewer units than we'd planned. */
8924 *xfered_len_units
= (ULONGEST
) units_written
;
8925 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8928 /* Write memory data directly to the remote machine.
8929 This does not inform the data cache; the data cache uses this.
8930 MEMADDR is the address in the remote memory space.
8931 MYADDR is the address of the buffer in our space.
8932 LEN is the number of bytes.
8934 Return the transferred status, error or OK (an
8935 'enum target_xfer_status' value). Save the number of bytes
8936 transferred in *XFERED_LEN. Only transfer a single packet. */
8939 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
8940 ULONGEST len
, int unit_size
,
8941 ULONGEST
*xfered_len
)
8943 const char *packet_format
= NULL
;
8945 /* Check whether the target supports binary download. */
8946 check_binary_download (memaddr
);
8948 switch (packet_support (PACKET_X
))
8951 packet_format
= "X";
8953 case PACKET_DISABLE
:
8954 packet_format
= "M";
8956 case PACKET_SUPPORT_UNKNOWN
:
8957 internal_error (__FILE__
, __LINE__
,
8958 _("remote_write_bytes: bad internal state"));
8960 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8963 return remote_write_bytes_aux (packet_format
,
8964 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8965 packet_format
[0], 1);
8968 /* Read memory data directly from the remote machine.
8969 This does not use the data cache; the data cache uses this.
8970 MEMADDR is the address in the remote memory space.
8971 MYADDR is the address of the buffer in our space.
8972 LEN_UNITS is the number of addressable memory units to read..
8973 UNIT_SIZE is the length in bytes of an addressable unit.
8975 Return the transferred status, error or OK (an
8976 'enum target_xfer_status' value). Save the number of bytes
8977 transferred in *XFERED_LEN_UNITS.
8979 See the comment of remote_write_bytes_aux for an example of
8980 memory read/write exchange between gdb and the stub. */
8983 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
8985 int unit_size
, ULONGEST
*xfered_len_units
)
8987 struct remote_state
*rs
= get_remote_state ();
8988 int buf_size_bytes
; /* Max size of packet output buffer. */
8993 buf_size_bytes
= get_memory_read_packet_size ();
8994 /* The packet buffer will be large enough for the payload;
8995 get_memory_packet_size ensures this. */
8997 /* Number of units that will fit. */
8998 todo_units
= std::min (len_units
,
8999 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
9001 /* Construct "m"<memaddr>","<len>". */
9002 memaddr
= remote_address_masked (memaddr
);
9003 p
= rs
->buf
.data ();
9005 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9007 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
9010 getpkt (&rs
->buf
, 0);
9011 if (rs
->buf
[0] == 'E'
9012 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
9013 && rs
->buf
[3] == '\0')
9014 return TARGET_XFER_E_IO
;
9015 /* Reply describes memory byte by byte, each byte encoded as two hex
9017 p
= rs
->buf
.data ();
9018 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
9019 /* Return what we have. Let higher layers handle partial reads. */
9020 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
9021 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9024 /* Using the set of read-only target sections of remote, read live
9027 For interface/parameters/return description see target.h,
9031 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
9035 ULONGEST
*xfered_len
)
9037 struct target_section
*secp
;
9039 secp
= target_section_by_addr (this, memaddr
);
9041 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
9043 ULONGEST memend
= memaddr
+ len
;
9045 target_section_table
*table
= target_get_section_table (this);
9046 for (target_section
&p
: *table
)
9048 if (memaddr
>= p
.addr
)
9050 if (memend
<= p
.endaddr
)
9052 /* Entire transfer is within this section. */
9053 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9056 else if (memaddr
>= p
.endaddr
)
9058 /* This section ends before the transfer starts. */
9063 /* This section overlaps the transfer. Just do half. */
9064 len
= p
.endaddr
- memaddr
;
9065 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9072 return TARGET_XFER_EOF
;
9075 /* Similar to remote_read_bytes_1, but it reads from the remote stub
9076 first if the requested memory is unavailable in traceframe.
9077 Otherwise, fall back to remote_read_bytes_1. */
9080 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
9081 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
9082 ULONGEST
*xfered_len
)
9085 return TARGET_XFER_EOF
;
9087 if (get_traceframe_number () != -1)
9089 std::vector
<mem_range
> available
;
9091 /* If we fail to get the set of available memory, then the
9092 target does not support querying traceframe info, and so we
9093 attempt reading from the traceframe anyway (assuming the
9094 target implements the old QTro packet then). */
9095 if (traceframe_available_memory (&available
, memaddr
, len
))
9097 if (available
.empty () || available
[0].start
!= memaddr
)
9099 enum target_xfer_status res
;
9101 /* Don't read into the traceframe's available
9103 if (!available
.empty ())
9105 LONGEST oldlen
= len
;
9107 len
= available
[0].start
- memaddr
;
9108 gdb_assert (len
<= oldlen
);
9111 /* This goes through the topmost target again. */
9112 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
9113 len
, unit_size
, xfered_len
);
9114 if (res
== TARGET_XFER_OK
)
9115 return TARGET_XFER_OK
;
9118 /* No use trying further, we know some memory starting
9119 at MEMADDR isn't available. */
9121 return (*xfered_len
!= 0) ?
9122 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
9126 /* Don't try to read more than how much is available, in
9127 case the target implements the deprecated QTro packet to
9128 cater for older GDBs (the target's knowledge of read-only
9129 sections may be outdated by now). */
9130 len
= available
[0].length
;
9134 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
9139 /* Sends a packet with content determined by the printf format string
9140 FORMAT and the remaining arguments, then gets the reply. Returns
9141 whether the packet was a success, a failure, or unknown. */
9144 remote_target::remote_send_printf (const char *format
, ...)
9146 struct remote_state
*rs
= get_remote_state ();
9147 int max_size
= get_remote_packet_size ();
9150 va_start (ap
, format
);
9153 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
9157 if (size
>= max_size
)
9158 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
9160 if (putpkt (rs
->buf
) < 0)
9161 error (_("Communication problem with target."));
9164 getpkt (&rs
->buf
, 0);
9166 return packet_check_result (rs
->buf
);
9169 /* Flash writing can take quite some time. We'll set
9170 effectively infinite timeout for flash operations.
9171 In future, we'll need to decide on a better approach. */
9172 static const int remote_flash_timeout
= 1000;
9175 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9177 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9178 enum packet_result ret
;
9179 scoped_restore restore_timeout
9180 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9182 ret
= remote_send_printf ("vFlashErase:%s,%s",
9183 phex (address
, addr_size
),
9187 case PACKET_UNKNOWN
:
9188 error (_("Remote target does not support flash erase"));
9190 error (_("Error erasing flash with vFlashErase packet"));
9197 remote_target::remote_flash_write (ULONGEST address
,
9198 ULONGEST length
, ULONGEST
*xfered_len
,
9199 const gdb_byte
*data
)
9201 scoped_restore restore_timeout
9202 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9203 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9208 remote_target::flash_done ()
9212 scoped_restore restore_timeout
9213 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9215 ret
= remote_send_printf ("vFlashDone");
9219 case PACKET_UNKNOWN
:
9220 error (_("Remote target does not support vFlashDone"));
9222 error (_("Error finishing flash operation"));
9229 remote_target::files_info ()
9231 puts_filtered ("Debugging a target over a serial line.\n");
9234 /* Stuff for dealing with the packets which are part of this protocol.
9235 See comment at top of file for details. */
9237 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9238 error to higher layers. Called when a serial error is detected.
9239 The exception message is STRING, followed by a colon and a blank,
9240 the system error message for errno at function entry and final dot
9241 for output compatibility with throw_perror_with_name. */
9244 unpush_and_perror (remote_target
*target
, const char *string
)
9246 int saved_errno
= errno
;
9248 remote_unpush_target (target
);
9249 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9250 safe_strerror (saved_errno
));
9253 /* Read a single character from the remote end. The current quit
9254 handler is overridden to avoid quitting in the middle of packet
9255 sequence, as that would break communication with the remote server.
9256 See remote_serial_quit_handler for more detail. */
9259 remote_target::readchar (int timeout
)
9262 struct remote_state
*rs
= get_remote_state ();
9265 scoped_restore restore_quit_target
9266 = make_scoped_restore (&curr_quit_handler_target
, this);
9267 scoped_restore restore_quit
9268 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9270 rs
->got_ctrlc_during_io
= 0;
9272 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9274 if (rs
->got_ctrlc_during_io
)
9281 switch ((enum serial_rc
) ch
)
9284 remote_unpush_target (this);
9285 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9288 unpush_and_perror (this, _("Remote communication error. "
9289 "Target disconnected."));
9291 case SERIAL_TIMEOUT
:
9297 /* Wrapper for serial_write that closes the target and throws if
9298 writing fails. The current quit handler is overridden to avoid
9299 quitting in the middle of packet sequence, as that would break
9300 communication with the remote server. See
9301 remote_serial_quit_handler for more detail. */
9304 remote_target::remote_serial_write (const char *str
, int len
)
9306 struct remote_state
*rs
= get_remote_state ();
9308 scoped_restore restore_quit_target
9309 = make_scoped_restore (&curr_quit_handler_target
, this);
9310 scoped_restore restore_quit
9311 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9313 rs
->got_ctrlc_during_io
= 0;
9315 if (serial_write (rs
->remote_desc
, str
, len
))
9317 unpush_and_perror (this, _("Remote communication error. "
9318 "Target disconnected."));
9321 if (rs
->got_ctrlc_during_io
)
9325 /* Return a string representing an escaped version of BUF, of len N.
9326 E.g. \n is converted to \\n, \t to \\t, etc. */
9329 escape_buffer (const char *buf
, int n
)
9333 stb
.putstrn (buf
, n
, '\\');
9334 return std::move (stb
.string ());
9337 /* Display a null-terminated packet on stdout, for debugging, using C
9341 print_packet (const char *buf
)
9343 puts_filtered ("\"");
9344 fputstr_filtered (buf
, '"', gdb_stdout
);
9345 puts_filtered ("\"");
9349 remote_target::putpkt (const char *buf
)
9351 return putpkt_binary (buf
, strlen (buf
));
9354 /* Wrapper around remote_target::putpkt to avoid exporting
9358 putpkt (remote_target
*remote
, const char *buf
)
9360 return remote
->putpkt (buf
);
9363 /* Send a packet to the remote machine, with error checking. The data
9364 of the packet is in BUF. The string in BUF can be at most
9365 get_remote_packet_size () - 5 to account for the $, # and checksum,
9366 and for a possible /0 if we are debugging (remote_debug) and want
9367 to print the sent packet as a string. */
9370 remote_target::putpkt_binary (const char *buf
, int cnt
)
9372 struct remote_state
*rs
= get_remote_state ();
9374 unsigned char csum
= 0;
9375 gdb::def_vector
<char> data (cnt
+ 6);
9376 char *buf2
= data
.data ();
9382 /* Catch cases like trying to read memory or listing threads while
9383 we're waiting for a stop reply. The remote server wouldn't be
9384 ready to handle this request, so we'd hang and timeout. We don't
9385 have to worry about this in synchronous mode, because in that
9386 case it's not possible to issue a command while the target is
9387 running. This is not a problem in non-stop mode, because in that
9388 case, the stub is always ready to process serial input. */
9389 if (!target_is_non_stop_p ()
9390 && target_is_async_p ()
9391 && rs
->waiting_for_stop_reply
)
9393 error (_("Cannot execute this command while the target is running.\n"
9394 "Use the \"interrupt\" command to stop the target\n"
9395 "and then try again."));
9398 /* We're sending out a new packet. Make sure we don't look at a
9399 stale cached response. */
9400 rs
->cached_wait_status
= 0;
9402 /* Copy the packet into buffer BUF2, encapsulating it
9403 and giving it a checksum. */
9408 for (i
= 0; i
< cnt
; i
++)
9414 *p
++ = tohex ((csum
>> 4) & 0xf);
9415 *p
++ = tohex (csum
& 0xf);
9417 /* Send it over and over until we get a positive ack. */
9421 int started_error_output
= 0;
9427 int len
= (int) (p
- buf2
);
9430 if (remote_packet_max_chars
< 0)
9433 max_chars
= remote_packet_max_chars
;
9436 = escape_buffer (buf2
, std::min (len
, max_chars
));
9438 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
9440 if (len
> max_chars
)
9441 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9444 fprintf_unfiltered (gdb_stdlog
, "...");
9446 gdb_flush (gdb_stdlog
);
9448 remote_serial_write (buf2
, p
- buf2
);
9450 /* If this is a no acks version of the remote protocol, send the
9451 packet and move on. */
9455 /* Read until either a timeout occurs (-2) or '+' is read.
9456 Handle any notification that arrives in the mean time. */
9459 ch
= readchar (remote_timeout
);
9467 case SERIAL_TIMEOUT
:
9470 if (started_error_output
)
9472 putchar_unfiltered ('\n');
9473 started_error_output
= 0;
9482 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
9486 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
9488 case SERIAL_TIMEOUT
:
9492 break; /* Retransmit buffer. */
9496 fprintf_unfiltered (gdb_stdlog
,
9497 "Packet instead of Ack, ignoring it\n");
9498 /* It's probably an old response sent because an ACK
9499 was lost. Gobble up the packet and ack it so it
9500 doesn't get retransmitted when we resend this
9503 remote_serial_write ("+", 1);
9504 continue; /* Now, go look for +. */
9511 /* If we got a notification, handle it, and go back to looking
9513 /* We've found the start of a notification. Now
9514 collect the data. */
9515 val
= read_frame (&rs
->buf
);
9520 std::string str
= escape_buffer (rs
->buf
.data (), val
);
9522 fprintf_unfiltered (gdb_stdlog
,
9523 " Notification received: %s\n",
9526 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9527 /* We're in sync now, rewait for the ack. */
9534 if (!started_error_output
)
9536 started_error_output
= 1;
9537 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9539 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9540 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
.data ());
9549 if (!started_error_output
)
9551 started_error_output
= 1;
9552 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9554 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9558 break; /* Here to retransmit. */
9562 /* This is wrong. If doing a long backtrace, the user should be
9563 able to get out next time we call QUIT, without anything as
9564 violent as interrupt_query. If we want to provide a way out of
9565 here without getting to the next QUIT, it should be based on
9566 hitting ^C twice as in remote_wait. */
9578 /* Come here after finding the start of a frame when we expected an
9579 ack. Do our best to discard the rest of this packet. */
9582 remote_target::skip_frame ()
9588 c
= readchar (remote_timeout
);
9591 case SERIAL_TIMEOUT
:
9592 /* Nothing we can do. */
9595 /* Discard the two bytes of checksum and stop. */
9596 c
= readchar (remote_timeout
);
9598 c
= readchar (remote_timeout
);
9601 case '*': /* Run length encoding. */
9602 /* Discard the repeat count. */
9603 c
= readchar (remote_timeout
);
9608 /* A regular character. */
9614 /* Come here after finding the start of the frame. Collect the rest
9615 into *BUF, verifying the checksum, length, and handling run-length
9616 compression. NUL terminate the buffer. If there is not enough room,
9619 Returns -1 on error, number of characters in buffer (ignoring the
9620 trailing NULL) on success. (could be extended to return one of the
9621 SERIAL status indications). */
9624 remote_target::read_frame (gdb::char_vector
*buf_p
)
9629 char *buf
= buf_p
->data ();
9630 struct remote_state
*rs
= get_remote_state ();
9637 c
= readchar (remote_timeout
);
9640 case SERIAL_TIMEOUT
:
9642 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
9646 fputs_filtered ("Saw new packet start in middle of old one\n",
9648 return -1; /* Start a new packet, count retries. */
9651 unsigned char pktcsum
;
9657 check_0
= readchar (remote_timeout
);
9659 check_1
= readchar (remote_timeout
);
9661 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9664 fputs_filtered ("Timeout in checksum, retrying\n",
9668 else if (check_0
< 0 || check_1
< 0)
9671 fputs_filtered ("Communication error in checksum\n",
9676 /* Don't recompute the checksum; with no ack packets we
9677 don't have any way to indicate a packet retransmission
9682 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9683 if (csum
== pktcsum
)
9688 std::string str
= escape_buffer (buf
, bc
);
9690 fprintf_unfiltered (gdb_stdlog
,
9691 "Bad checksum, sentsum=0x%x, "
9692 "csum=0x%x, buf=%s\n",
9693 pktcsum
, csum
, str
.c_str ());
9695 /* Number of characters in buffer ignoring trailing
9699 case '*': /* Run length encoding. */
9704 c
= readchar (remote_timeout
);
9706 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9708 /* The character before ``*'' is repeated. */
9710 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9712 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9714 /* Make some more room in the buffer. */
9715 buf_p
->resize (buf_p
->size () + repeat
);
9716 buf
= buf_p
->data ();
9719 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9725 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9729 if (bc
>= buf_p
->size () - 1)
9731 /* Make some more room in the buffer. */
9732 buf_p
->resize (buf_p
->size () * 2);
9733 buf
= buf_p
->data ();
9743 /* Set this to the maximum number of seconds to wait instead of waiting forever
9744 in target_wait(). If this timer times out, then it generates an error and
9745 the command is aborted. This replaces most of the need for timeouts in the
9746 GDB test suite, and makes it possible to distinguish between a hung target
9747 and one with slow communications. */
9749 static int watchdog
= 0;
9751 show_watchdog (struct ui_file
*file
, int from_tty
,
9752 struct cmd_list_element
*c
, const char *value
)
9754 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
9757 /* Read a packet from the remote machine, with error checking, and
9758 store it in *BUF. Resize *BUF if necessary to hold the result. If
9759 FOREVER, wait forever rather than timing out; this is used (in
9760 synchronous mode) to wait for a target that is is executing user
9762 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9763 don't have to change all the calls to getpkt to deal with the
9764 return value, because at the moment I don't know what the right
9765 thing to do it for those. */
9768 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9770 getpkt_sane (buf
, forever
);
9774 /* Read a packet from the remote machine, with error checking, and
9775 store it in *BUF. Resize *BUF if necessary to hold the result. If
9776 FOREVER, wait forever rather than timing out; this is used (in
9777 synchronous mode) to wait for a target that is is executing user
9778 code to stop. If FOREVER == 0, this function is allowed to time
9779 out gracefully and return an indication of this to the caller.
9780 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9781 consider receiving a notification enough reason to return to the
9782 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9783 holds a notification or not (a regular packet). */
9786 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9787 int forever
, int expecting_notif
,
9790 struct remote_state
*rs
= get_remote_state ();
9796 /* We're reading a new response. Make sure we don't look at a
9797 previously cached response. */
9798 rs
->cached_wait_status
= 0;
9800 strcpy (buf
->data (), "timeout");
9803 timeout
= watchdog
> 0 ? watchdog
: -1;
9804 else if (expecting_notif
)
9805 timeout
= 0; /* There should already be a char in the buffer. If
9808 timeout
= remote_timeout
;
9812 /* Process any number of notifications, and then return when
9816 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9818 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9820 /* This can loop forever if the remote side sends us
9821 characters continuously, but if it pauses, we'll get
9822 SERIAL_TIMEOUT from readchar because of timeout. Then
9823 we'll count that as a retry.
9825 Note that even when forever is set, we will only wait
9826 forever prior to the start of a packet. After that, we
9827 expect characters to arrive at a brisk pace. They should
9828 show up within remote_timeout intervals. */
9830 c
= readchar (timeout
);
9831 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9833 if (c
== SERIAL_TIMEOUT
)
9835 if (expecting_notif
)
9836 return -1; /* Don't complain, it's normal to not get
9837 anything in this case. */
9839 if (forever
) /* Watchdog went off? Kill the target. */
9841 remote_unpush_target (this);
9842 throw_error (TARGET_CLOSE_ERROR
,
9843 _("Watchdog timeout has expired. "
9844 "Target detached."));
9847 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9851 /* We've found the start of a packet or notification.
9852 Now collect the data. */
9853 val
= read_frame (buf
);
9858 remote_serial_write ("-", 1);
9861 if (tries
> MAX_TRIES
)
9863 /* We have tried hard enough, and just can't receive the
9864 packet/notification. Give up. */
9865 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9867 /* Skip the ack char if we're in no-ack mode. */
9868 if (!rs
->noack_mode
)
9869 remote_serial_write ("+", 1);
9873 /* If we got an ordinary packet, return that to our caller. */
9880 if (remote_packet_max_chars
< 0)
9883 max_chars
= remote_packet_max_chars
;
9886 = escape_buffer (buf
->data (),
9887 std::min (val
, max_chars
));
9889 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9892 if (val
> max_chars
)
9893 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9896 fprintf_unfiltered (gdb_stdlog
, "\n");
9899 /* Skip the ack char if we're in no-ack mode. */
9900 if (!rs
->noack_mode
)
9901 remote_serial_write ("+", 1);
9902 if (is_notif
!= NULL
)
9907 /* If we got a notification, handle it, and go back to looking
9911 gdb_assert (c
== '%');
9915 std::string str
= escape_buffer (buf
->data (), val
);
9917 fprintf_unfiltered (gdb_stdlog
,
9918 " Notification received: %s\n",
9921 if (is_notif
!= NULL
)
9924 handle_notification (rs
->notif_state
, buf
->data ());
9926 /* Notifications require no acknowledgement. */
9928 if (expecting_notif
)
9935 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
9937 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
9941 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
9944 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
9947 /* Kill any new fork children of process PID that haven't been
9948 processed by follow_fork. */
9951 remote_target::kill_new_fork_children (int pid
)
9953 remote_state
*rs
= get_remote_state ();
9954 struct notif_client
*notif
= ¬if_client_stop
;
9956 /* Kill the fork child threads of any threads in process PID
9957 that are stopped at a fork event. */
9958 for (thread_info
*thread
: all_non_exited_threads (this))
9960 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9962 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9964 int child_pid
= ws
->value
.related_pid
.pid ();
9967 res
= remote_vkill (child_pid
);
9969 error (_("Can't kill fork child process %d"), child_pid
);
9973 /* Check for any pending fork events (not reported or processed yet)
9974 in process PID and kill those fork child threads as well. */
9975 remote_notif_get_pending_events (notif
);
9976 for (auto &event
: rs
->stop_reply_queue
)
9977 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
9979 int child_pid
= event
->ws
.value
.related_pid
.pid ();
9982 res
= remote_vkill (child_pid
);
9984 error (_("Can't kill fork child process %d"), child_pid
);
9989 /* Target hook to kill the current inferior. */
9992 remote_target::kill ()
9995 int pid
= inferior_ptid
.pid ();
9996 struct remote_state
*rs
= get_remote_state ();
9998 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
10000 /* If we're stopped while forking and we haven't followed yet,
10001 kill the child task. We need to do this before killing the
10002 parent task because if this is a vfork then the parent will
10004 kill_new_fork_children (pid
);
10006 res
= remote_vkill (pid
);
10009 target_mourn_inferior (inferior_ptid
);
10014 /* If we are in 'target remote' mode and we are killing the only
10015 inferior, then we will tell gdbserver to exit and unpush the
10017 if (res
== -1 && !remote_multi_process_p (rs
)
10018 && number_of_live_inferiors (this) == 1)
10022 /* We've killed the remote end, we get to mourn it. If we are
10023 not in extended mode, mourning the inferior also unpushes
10024 remote_ops from the target stack, which closes the remote
10026 target_mourn_inferior (inferior_ptid
);
10031 error (_("Can't kill process"));
10034 /* Send a kill request to the target using the 'vKill' packet. */
10037 remote_target::remote_vkill (int pid
)
10039 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
10042 remote_state
*rs
= get_remote_state ();
10044 /* Tell the remote target to detach. */
10045 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
10047 getpkt (&rs
->buf
, 0);
10049 switch (packet_ok (rs
->buf
,
10050 &remote_protocol_packets
[PACKET_vKill
]))
10056 case PACKET_UNKNOWN
:
10059 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
10063 /* Send a kill request to the target using the 'k' packet. */
10066 remote_target::remote_kill_k ()
10068 /* Catch errors so the user can quit from gdb even when we
10069 aren't on speaking terms with the remote system. */
10074 catch (const gdb_exception_error
&ex
)
10076 if (ex
.error
== TARGET_CLOSE_ERROR
)
10078 /* If we got an (EOF) error that caused the target
10079 to go away, then we're done, that's what we wanted.
10080 "k" is susceptible to cause a premature EOF, given
10081 that the remote server isn't actually required to
10082 reply to "k", and it can happen that it doesn't
10083 even get to reply ACK to the "k". */
10087 /* Otherwise, something went wrong. We didn't actually kill
10088 the target. Just propagate the exception, and let the
10089 user or higher layers decide what to do. */
10095 remote_target::mourn_inferior ()
10097 struct remote_state
*rs
= get_remote_state ();
10099 /* We're no longer interested in notification events of an inferior
10100 that exited or was killed/detached. */
10101 discard_pending_stop_replies (current_inferior ());
10103 /* In 'target remote' mode with one inferior, we close the connection. */
10104 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
10106 remote_unpush_target (this);
10110 /* In case we got here due to an error, but we're going to stay
10112 rs
->waiting_for_stop_reply
= 0;
10114 /* If the current general thread belonged to the process we just
10115 detached from or has exited, the remote side current general
10116 thread becomes undefined. Considering a case like this:
10118 - We just got here due to a detach.
10119 - The process that we're detaching from happens to immediately
10120 report a global breakpoint being hit in non-stop mode, in the
10121 same thread we had selected before.
10122 - GDB attaches to this process again.
10123 - This event happens to be the next event we handle.
10125 GDB would consider that the current general thread didn't need to
10126 be set on the stub side (with Hg), since for all it knew,
10127 GENERAL_THREAD hadn't changed.
10129 Notice that although in all-stop mode, the remote server always
10130 sets the current thread to the thread reporting the stop event,
10131 that doesn't happen in non-stop mode; in non-stop, the stub *must
10132 not* change the current thread when reporting a breakpoint hit,
10133 due to the decoupling of event reporting and event handling.
10135 To keep things simple, we always invalidate our notion of the
10137 record_currthread (rs
, minus_one_ptid
);
10139 /* Call common code to mark the inferior as not running. */
10140 generic_mourn_inferior ();
10144 extended_remote_target::supports_disable_randomization ()
10146 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
10150 remote_target::extended_remote_disable_randomization (int val
)
10152 struct remote_state
*rs
= get_remote_state ();
10155 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10156 "QDisableRandomization:%x", val
);
10158 reply
= remote_get_noisy_reply ();
10159 if (*reply
== '\0')
10160 error (_("Target does not support QDisableRandomization."));
10161 if (strcmp (reply
, "OK") != 0)
10162 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10166 remote_target::extended_remote_run (const std::string
&args
)
10168 struct remote_state
*rs
= get_remote_state ();
10170 const char *remote_exec_file
= get_remote_exec_file ();
10172 /* If the user has disabled vRun support, or we have detected that
10173 support is not available, do not try it. */
10174 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10177 strcpy (rs
->buf
.data (), "vRun;");
10178 len
= strlen (rs
->buf
.data ());
10180 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10181 error (_("Remote file name too long for run packet"));
10182 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10183 strlen (remote_exec_file
));
10185 if (!args
.empty ())
10189 gdb_argv
argv (args
.c_str ());
10190 for (i
= 0; argv
[i
] != NULL
; i
++)
10192 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10193 error (_("Argument list too long for run packet"));
10194 rs
->buf
[len
++] = ';';
10195 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10200 rs
->buf
[len
++] = '\0';
10203 getpkt (&rs
->buf
, 0);
10205 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10208 /* We have a wait response. All is well. */
10210 case PACKET_UNKNOWN
:
10213 if (remote_exec_file
[0] == '\0')
10214 error (_("Running the default executable on the remote target failed; "
10215 "try \"set remote exec-file\"?"));
10217 error (_("Running \"%s\" on the remote target failed"),
10220 gdb_assert_not_reached (_("bad switch"));
10224 /* Helper function to send set/unset environment packets. ACTION is
10225 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10226 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10230 remote_target::send_environment_packet (const char *action
,
10231 const char *packet
,
10234 remote_state
*rs
= get_remote_state ();
10236 /* Convert the environment variable to an hex string, which
10237 is the best format to be transmitted over the wire. */
10238 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10241 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10242 "%s:%s", packet
, encoded_value
.c_str ());
10245 getpkt (&rs
->buf
, 0);
10246 if (strcmp (rs
->buf
.data (), "OK") != 0)
10247 warning (_("Unable to %s environment variable '%s' on remote."),
10251 /* Helper function to handle the QEnvironment* packets. */
10254 remote_target::extended_remote_environment_support ()
10256 remote_state
*rs
= get_remote_state ();
10258 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10260 putpkt ("QEnvironmentReset");
10261 getpkt (&rs
->buf
, 0);
10262 if (strcmp (rs
->buf
.data (), "OK") != 0)
10263 warning (_("Unable to reset environment on remote."));
10266 gdb_environ
*e
= ¤t_inferior ()->environment
;
10268 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10269 for (const std::string
&el
: e
->user_set_env ())
10270 send_environment_packet ("set", "QEnvironmentHexEncoded",
10273 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10274 for (const std::string
&el
: e
->user_unset_env ())
10275 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10278 /* Helper function to set the current working directory for the
10279 inferior in the remote target. */
10282 remote_target::extended_remote_set_inferior_cwd ()
10284 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10286 const char *inferior_cwd
= get_inferior_cwd ();
10287 remote_state
*rs
= get_remote_state ();
10289 if (inferior_cwd
!= NULL
)
10291 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10292 strlen (inferior_cwd
));
10294 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10295 "QSetWorkingDir:%s", hexpath
.c_str ());
10299 /* An empty inferior_cwd means that the user wants us to
10300 reset the remote server's inferior's cwd. */
10301 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10302 "QSetWorkingDir:");
10306 getpkt (&rs
->buf
, 0);
10307 if (packet_ok (rs
->buf
,
10308 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10311 Remote replied unexpectedly while setting the inferior's working\n\
10318 /* In the extended protocol we want to be able to do things like
10319 "run" and have them basically work as expected. So we need
10320 a special create_inferior function. We support changing the
10321 executable file and the command line arguments, but not the
10325 extended_remote_target::create_inferior (const char *exec_file
,
10326 const std::string
&args
,
10327 char **env
, int from_tty
)
10331 struct remote_state
*rs
= get_remote_state ();
10332 const char *remote_exec_file
= get_remote_exec_file ();
10334 /* If running asynchronously, register the target file descriptor
10335 with the event loop. */
10336 if (target_can_async_p ())
10339 /* Disable address space randomization if requested (and supported). */
10340 if (supports_disable_randomization ())
10341 extended_remote_disable_randomization (disable_randomization
);
10343 /* If startup-with-shell is on, we inform gdbserver to start the
10344 remote inferior using a shell. */
10345 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10347 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10348 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10350 getpkt (&rs
->buf
, 0);
10351 if (strcmp (rs
->buf
.data (), "OK") != 0)
10353 Remote replied unexpectedly while setting startup-with-shell: %s"),
10357 extended_remote_environment_support ();
10359 extended_remote_set_inferior_cwd ();
10361 /* Now restart the remote server. */
10362 run_worked
= extended_remote_run (args
) != -1;
10365 /* vRun was not supported. Fail if we need it to do what the
10367 if (remote_exec_file
[0])
10368 error (_("Remote target does not support \"set remote exec-file\""));
10369 if (!args
.empty ())
10370 error (_("Remote target does not support \"set args\" or run ARGS"));
10372 /* Fall back to "R". */
10373 extended_remote_restart ();
10376 /* vRun's success return is a stop reply. */
10377 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10378 add_current_inferior_and_thread (stop_reply
);
10380 /* Get updated offsets, if the stub uses qOffsets. */
10385 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10386 the list of conditions (in agent expression bytecode format), if any, the
10387 target needs to evaluate. The output is placed into the packet buffer
10388 started from BUF and ended at BUF_END. */
10391 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10392 struct bp_target_info
*bp_tgt
, char *buf
,
10395 if (bp_tgt
->conditions
.empty ())
10398 buf
+= strlen (buf
);
10399 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10402 /* Send conditions to the target. */
10403 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10405 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10406 buf
+= strlen (buf
);
10407 for (int i
= 0; i
< aexpr
->len
; ++i
)
10408 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10415 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10416 struct bp_target_info
*bp_tgt
, char *buf
)
10418 if (bp_tgt
->tcommands
.empty ())
10421 buf
+= strlen (buf
);
10423 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10424 buf
+= strlen (buf
);
10426 /* Concatenate all the agent expressions that are commands into the
10428 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10430 sprintf (buf
, "X%x,", aexpr
->len
);
10431 buf
+= strlen (buf
);
10432 for (int i
= 0; i
< aexpr
->len
; ++i
)
10433 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10438 /* Insert a breakpoint. On targets that have software breakpoint
10439 support, we ask the remote target to do the work; on targets
10440 which don't, we insert a traditional memory breakpoint. */
10443 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10444 struct bp_target_info
*bp_tgt
)
10446 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10447 If it succeeds, then set the support to PACKET_ENABLE. If it
10448 fails, and the user has explicitly requested the Z support then
10449 report an error, otherwise, mark it disabled and go on. */
10451 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10453 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10454 struct remote_state
*rs
;
10457 /* Make sure the remote is pointing at the right process, if
10459 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10460 set_general_process ();
10462 rs
= get_remote_state ();
10463 p
= rs
->buf
.data ();
10464 endbuf
= p
+ get_remote_packet_size ();
10469 addr
= (ULONGEST
) remote_address_masked (addr
);
10470 p
+= hexnumstr (p
, addr
);
10471 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10473 if (supports_evaluation_of_breakpoint_conditions ())
10474 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10476 if (can_run_breakpoint_commands ())
10477 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10480 getpkt (&rs
->buf
, 0);
10482 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10488 case PACKET_UNKNOWN
:
10493 /* If this breakpoint has target-side commands but this stub doesn't
10494 support Z0 packets, throw error. */
10495 if (!bp_tgt
->tcommands
.empty ())
10496 throw_error (NOT_SUPPORTED_ERROR
, _("\
10497 Target doesn't support breakpoints that have target side commands."));
10499 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10503 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10504 struct bp_target_info
*bp_tgt
,
10505 enum remove_bp_reason reason
)
10507 CORE_ADDR addr
= bp_tgt
->placed_address
;
10508 struct remote_state
*rs
= get_remote_state ();
10510 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10512 char *p
= rs
->buf
.data ();
10513 char *endbuf
= p
+ get_remote_packet_size ();
10515 /* Make sure the remote is pointing at the right process, if
10517 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10518 set_general_process ();
10524 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10525 p
+= hexnumstr (p
, addr
);
10526 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10529 getpkt (&rs
->buf
, 0);
10531 return (rs
->buf
[0] == 'E');
10534 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10537 static enum Z_packet_type
10538 watchpoint_to_Z_packet (int type
)
10543 return Z_PACKET_WRITE_WP
;
10546 return Z_PACKET_READ_WP
;
10549 return Z_PACKET_ACCESS_WP
;
10552 internal_error (__FILE__
, __LINE__
,
10553 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10558 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10559 enum target_hw_bp_type type
, struct expression
*cond
)
10561 struct remote_state
*rs
= get_remote_state ();
10562 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10564 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10566 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10569 /* Make sure the remote is pointing at the right process, if
10571 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10572 set_general_process ();
10574 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10575 p
= strchr (rs
->buf
.data (), '\0');
10576 addr
= remote_address_masked (addr
);
10577 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10578 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10581 getpkt (&rs
->buf
, 0);
10583 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10587 case PACKET_UNKNOWN
:
10592 internal_error (__FILE__
, __LINE__
,
10593 _("remote_insert_watchpoint: reached end of function"));
10597 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10598 CORE_ADDR start
, int length
)
10600 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10602 return diff
< length
;
10607 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10608 enum target_hw_bp_type type
, struct expression
*cond
)
10610 struct remote_state
*rs
= get_remote_state ();
10611 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10613 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10615 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10618 /* Make sure the remote is pointing at the right process, if
10620 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10621 set_general_process ();
10623 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10624 p
= strchr (rs
->buf
.data (), '\0');
10625 addr
= remote_address_masked (addr
);
10626 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10627 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10629 getpkt (&rs
->buf
, 0);
10631 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10634 case PACKET_UNKNOWN
:
10639 internal_error (__FILE__
, __LINE__
,
10640 _("remote_remove_watchpoint: reached end of function"));
10644 static int remote_hw_watchpoint_limit
= -1;
10645 static int remote_hw_watchpoint_length_limit
= -1;
10646 static int remote_hw_breakpoint_limit
= -1;
10649 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10651 if (remote_hw_watchpoint_length_limit
== 0)
10653 else if (remote_hw_watchpoint_length_limit
< 0)
10655 else if (len
<= remote_hw_watchpoint_length_limit
)
10662 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10664 if (type
== bp_hardware_breakpoint
)
10666 if (remote_hw_breakpoint_limit
== 0)
10668 else if (remote_hw_breakpoint_limit
< 0)
10670 else if (cnt
<= remote_hw_breakpoint_limit
)
10675 if (remote_hw_watchpoint_limit
== 0)
10677 else if (remote_hw_watchpoint_limit
< 0)
10681 else if (cnt
<= remote_hw_watchpoint_limit
)
10687 /* The to_stopped_by_sw_breakpoint method of target remote. */
10690 remote_target::stopped_by_sw_breakpoint ()
10692 struct thread_info
*thread
= inferior_thread ();
10694 return (thread
->priv
!= NULL
10695 && (get_remote_thread_info (thread
)->stop_reason
10696 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10699 /* The to_supports_stopped_by_sw_breakpoint method of target
10703 remote_target::supports_stopped_by_sw_breakpoint ()
10705 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10708 /* The to_stopped_by_hw_breakpoint method of target remote. */
10711 remote_target::stopped_by_hw_breakpoint ()
10713 struct thread_info
*thread
= inferior_thread ();
10715 return (thread
->priv
!= NULL
10716 && (get_remote_thread_info (thread
)->stop_reason
10717 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10720 /* The to_supports_stopped_by_hw_breakpoint method of target
10724 remote_target::supports_stopped_by_hw_breakpoint ()
10726 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10730 remote_target::stopped_by_watchpoint ()
10732 struct thread_info
*thread
= inferior_thread ();
10734 return (thread
->priv
!= NULL
10735 && (get_remote_thread_info (thread
)->stop_reason
10736 == TARGET_STOPPED_BY_WATCHPOINT
));
10740 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10742 struct thread_info
*thread
= inferior_thread ();
10744 if (thread
->priv
!= NULL
10745 && (get_remote_thread_info (thread
)->stop_reason
10746 == TARGET_STOPPED_BY_WATCHPOINT
))
10748 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10757 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10758 struct bp_target_info
*bp_tgt
)
10760 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10761 struct remote_state
*rs
;
10765 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10768 /* Make sure the remote is pointing at the right process, if
10770 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10771 set_general_process ();
10773 rs
= get_remote_state ();
10774 p
= rs
->buf
.data ();
10775 endbuf
= p
+ get_remote_packet_size ();
10781 addr
= remote_address_masked (addr
);
10782 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10783 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10785 if (supports_evaluation_of_breakpoint_conditions ())
10786 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10788 if (can_run_breakpoint_commands ())
10789 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10792 getpkt (&rs
->buf
, 0);
10794 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10797 if (rs
->buf
[1] == '.')
10799 message
= strchr (&rs
->buf
[2], '.');
10801 error (_("Remote failure reply: %s"), message
+ 1);
10804 case PACKET_UNKNOWN
:
10809 internal_error (__FILE__
, __LINE__
,
10810 _("remote_insert_hw_breakpoint: reached end of function"));
10815 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10816 struct bp_target_info
*bp_tgt
)
10819 struct remote_state
*rs
= get_remote_state ();
10820 char *p
= rs
->buf
.data ();
10821 char *endbuf
= p
+ get_remote_packet_size ();
10823 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10826 /* Make sure the remote is pointing at the right process, if
10828 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10829 set_general_process ();
10835 addr
= remote_address_masked (bp_tgt
->placed_address
);
10836 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10837 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10840 getpkt (&rs
->buf
, 0);
10842 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10845 case PACKET_UNKNOWN
:
10850 internal_error (__FILE__
, __LINE__
,
10851 _("remote_remove_hw_breakpoint: reached end of function"));
10854 /* Verify memory using the "qCRC:" request. */
10857 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10859 struct remote_state
*rs
= get_remote_state ();
10860 unsigned long host_crc
, target_crc
;
10863 /* It doesn't make sense to use qCRC if the remote target is
10864 connected but not running. */
10865 if (target_has_execution ()
10866 && packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10868 enum packet_result result
;
10870 /* Make sure the remote is pointing at the right process. */
10871 set_general_process ();
10873 /* FIXME: assumes lma can fit into long. */
10874 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10875 (long) lma
, (long) size
);
10878 /* Be clever; compute the host_crc before waiting for target
10880 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10882 getpkt (&rs
->buf
, 0);
10884 result
= packet_ok (rs
->buf
,
10885 &remote_protocol_packets
[PACKET_qCRC
]);
10886 if (result
== PACKET_ERROR
)
10888 else if (result
== PACKET_OK
)
10890 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10891 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10893 return (host_crc
== target_crc
);
10897 return simple_verify_memory (this, data
, lma
, size
);
10900 /* compare-sections command
10902 With no arguments, compares each loadable section in the exec bfd
10903 with the same memory range on the target, and reports mismatches.
10904 Useful for verifying the image on the target against the exec file. */
10907 compare_sections_command (const char *args
, int from_tty
)
10910 const char *sectname
;
10911 bfd_size_type size
;
10914 int mismatched
= 0;
10918 if (!current_program_space
->exec_bfd ())
10919 error (_("command cannot be used without an exec file"));
10921 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10927 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
10929 if (!(s
->flags
& SEC_LOAD
))
10930 continue; /* Skip non-loadable section. */
10932 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10933 continue; /* Skip writeable sections */
10935 size
= bfd_section_size (s
);
10937 continue; /* Skip zero-length section. */
10939 sectname
= bfd_section_name (s
);
10940 if (args
&& strcmp (args
, sectname
) != 0)
10941 continue; /* Not the section selected by user. */
10943 matched
= 1; /* Do this section. */
10946 gdb::byte_vector
sectdata (size
);
10947 bfd_get_section_contents (current_program_space
->exec_bfd (), s
,
10948 sectdata
.data (), 0, size
);
10950 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10953 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10954 paddress (target_gdbarch (), lma
),
10955 paddress (target_gdbarch (), lma
+ size
));
10957 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10958 paddress (target_gdbarch (), lma
),
10959 paddress (target_gdbarch (), lma
+ size
));
10961 printf_filtered ("matched.\n");
10964 printf_filtered ("MIS-MATCHED!\n");
10968 if (mismatched
> 0)
10969 warning (_("One or more sections of the target image does not match\n\
10970 the loaded file\n"));
10971 if (args
&& !matched
)
10972 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10975 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10976 into remote target. The number of bytes written to the remote
10977 target is returned, or -1 for error. */
10980 remote_target::remote_write_qxfer (const char *object_name
,
10981 const char *annex
, const gdb_byte
*writebuf
,
10982 ULONGEST offset
, LONGEST len
,
10983 ULONGEST
*xfered_len
,
10984 struct packet_config
*packet
)
10988 struct remote_state
*rs
= get_remote_state ();
10989 int max_size
= get_memory_write_packet_size ();
10991 if (packet_config_support (packet
) == PACKET_DISABLE
)
10992 return TARGET_XFER_E_IO
;
10994 /* Insert header. */
10995 i
= snprintf (rs
->buf
.data (), max_size
,
10996 "qXfer:%s:write:%s:%s:",
10997 object_name
, annex
? annex
: "",
10998 phex_nz (offset
, sizeof offset
));
10999 max_size
-= (i
+ 1);
11001 /* Escape as much data as fits into rs->buf. */
11002 buf_len
= remote_escape_output
11003 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
11005 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
11006 || getpkt_sane (&rs
->buf
, 0) < 0
11007 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11008 return TARGET_XFER_E_IO
;
11010 unpack_varlen_hex (rs
->buf
.data (), &n
);
11013 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11016 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
11017 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
11018 number of bytes read is returned, or 0 for EOF, or -1 for error.
11019 The number of bytes read may be less than LEN without indicating an
11020 EOF. PACKET is checked and updated to indicate whether the remote
11021 target supports this object. */
11024 remote_target::remote_read_qxfer (const char *object_name
,
11026 gdb_byte
*readbuf
, ULONGEST offset
,
11028 ULONGEST
*xfered_len
,
11029 struct packet_config
*packet
)
11031 struct remote_state
*rs
= get_remote_state ();
11032 LONGEST i
, n
, packet_len
;
11034 if (packet_config_support (packet
) == PACKET_DISABLE
)
11035 return TARGET_XFER_E_IO
;
11037 /* Check whether we've cached an end-of-object packet that matches
11039 if (rs
->finished_object
)
11041 if (strcmp (object_name
, rs
->finished_object
) == 0
11042 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
11043 && offset
== rs
->finished_offset
)
11044 return TARGET_XFER_EOF
;
11047 /* Otherwise, we're now reading something different. Discard
11049 xfree (rs
->finished_object
);
11050 xfree (rs
->finished_annex
);
11051 rs
->finished_object
= NULL
;
11052 rs
->finished_annex
= NULL
;
11055 /* Request only enough to fit in a single packet. The actual data
11056 may not, since we don't know how much of it will need to be escaped;
11057 the target is free to respond with slightly less data. We subtract
11058 five to account for the response type and the protocol frame. */
11059 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
11060 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
11061 "qXfer:%s:read:%s:%s,%s",
11062 object_name
, annex
? annex
: "",
11063 phex_nz (offset
, sizeof offset
),
11064 phex_nz (n
, sizeof n
));
11065 i
= putpkt (rs
->buf
);
11067 return TARGET_XFER_E_IO
;
11070 packet_len
= getpkt_sane (&rs
->buf
, 0);
11071 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11072 return TARGET_XFER_E_IO
;
11074 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
11075 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
11077 /* 'm' means there is (or at least might be) more data after this
11078 batch. That does not make sense unless there's at least one byte
11079 of data in this reply. */
11080 if (rs
->buf
[0] == 'm' && packet_len
== 1)
11081 error (_("Remote qXfer reply contained no data."));
11083 /* Got some data. */
11084 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
11085 packet_len
- 1, readbuf
, n
);
11087 /* 'l' is an EOF marker, possibly including a final block of data,
11088 or possibly empty. If we have the final block of a non-empty
11089 object, record this fact to bypass a subsequent partial read. */
11090 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
11092 rs
->finished_object
= xstrdup (object_name
);
11093 rs
->finished_annex
= xstrdup (annex
? annex
: "");
11094 rs
->finished_offset
= offset
+ i
;
11098 return TARGET_XFER_EOF
;
11102 return TARGET_XFER_OK
;
11106 enum target_xfer_status
11107 remote_target::xfer_partial (enum target_object object
,
11108 const char *annex
, gdb_byte
*readbuf
,
11109 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
11110 ULONGEST
*xfered_len
)
11112 struct remote_state
*rs
;
11116 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
11118 set_remote_traceframe ();
11119 set_general_thread (inferior_ptid
);
11121 rs
= get_remote_state ();
11123 /* Handle memory using the standard memory routines. */
11124 if (object
== TARGET_OBJECT_MEMORY
)
11126 /* If the remote target is connected but not running, we should
11127 pass this request down to a lower stratum (e.g. the executable
11129 if (!target_has_execution ())
11130 return TARGET_XFER_EOF
;
11132 if (writebuf
!= NULL
)
11133 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
11136 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
11140 /* Handle extra signal info using qxfer packets. */
11141 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
11144 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
11145 xfered_len
, &remote_protocol_packets
11146 [PACKET_qXfer_siginfo_read
]);
11148 return remote_write_qxfer ("siginfo", annex
,
11149 writebuf
, offset
, len
, xfered_len
,
11150 &remote_protocol_packets
11151 [PACKET_qXfer_siginfo_write
]);
11154 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
11157 return remote_read_qxfer ("statictrace", annex
,
11158 readbuf
, offset
, len
, xfered_len
,
11159 &remote_protocol_packets
11160 [PACKET_qXfer_statictrace_read
]);
11162 return TARGET_XFER_E_IO
;
11165 /* Only handle flash writes. */
11166 if (writebuf
!= NULL
)
11170 case TARGET_OBJECT_FLASH
:
11171 return remote_flash_write (offset
, len
, xfered_len
,
11175 return TARGET_XFER_E_IO
;
11179 /* Map pre-existing objects onto letters. DO NOT do this for new
11180 objects!!! Instead specify new query packets. */
11183 case TARGET_OBJECT_AVR
:
11187 case TARGET_OBJECT_AUXV
:
11188 gdb_assert (annex
== NULL
);
11189 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
11191 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
11193 case TARGET_OBJECT_AVAILABLE_FEATURES
:
11194 return remote_read_qxfer
11195 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
11196 &remote_protocol_packets
[PACKET_qXfer_features
]);
11198 case TARGET_OBJECT_LIBRARIES
:
11199 return remote_read_qxfer
11200 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
11201 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
11203 case TARGET_OBJECT_LIBRARIES_SVR4
:
11204 return remote_read_qxfer
11205 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
11206 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
11208 case TARGET_OBJECT_MEMORY_MAP
:
11209 gdb_assert (annex
== NULL
);
11210 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
11212 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
11214 case TARGET_OBJECT_OSDATA
:
11215 /* Should only get here if we're connected. */
11216 gdb_assert (rs
->remote_desc
);
11217 return remote_read_qxfer
11218 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
11219 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
11221 case TARGET_OBJECT_THREADS
:
11222 gdb_assert (annex
== NULL
);
11223 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
11225 &remote_protocol_packets
[PACKET_qXfer_threads
]);
11227 case TARGET_OBJECT_TRACEFRAME_INFO
:
11228 gdb_assert (annex
== NULL
);
11229 return remote_read_qxfer
11230 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11231 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11233 case TARGET_OBJECT_FDPIC
:
11234 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11236 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11238 case TARGET_OBJECT_OPENVMS_UIB
:
11239 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11241 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11243 case TARGET_OBJECT_BTRACE
:
11244 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11246 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11248 case TARGET_OBJECT_BTRACE_CONF
:
11249 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11251 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11253 case TARGET_OBJECT_EXEC_FILE
:
11254 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11256 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11259 return TARGET_XFER_E_IO
;
11262 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11263 large enough let the caller deal with it. */
11264 if (len
< get_remote_packet_size ())
11265 return TARGET_XFER_E_IO
;
11266 len
= get_remote_packet_size ();
11268 /* Except for querying the minimum buffer size, target must be open. */
11269 if (!rs
->remote_desc
)
11270 error (_("remote query is only available after target open"));
11272 gdb_assert (annex
!= NULL
);
11273 gdb_assert (readbuf
!= NULL
);
11275 p2
= rs
->buf
.data ();
11277 *p2
++ = query_type
;
11279 /* We used one buffer char for the remote protocol q command and
11280 another for the query type. As the remote protocol encapsulation
11281 uses 4 chars plus one extra in case we are debugging
11282 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11285 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11287 /* Bad caller may have sent forbidden characters. */
11288 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11293 gdb_assert (annex
[i
] == '\0');
11295 i
= putpkt (rs
->buf
);
11297 return TARGET_XFER_E_IO
;
11299 getpkt (&rs
->buf
, 0);
11300 strcpy ((char *) readbuf
, rs
->buf
.data ());
11302 *xfered_len
= strlen ((char *) readbuf
);
11303 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11306 /* Implementation of to_get_memory_xfer_limit. */
11309 remote_target::get_memory_xfer_limit ()
11311 return get_memory_write_packet_size ();
11315 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11316 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11317 CORE_ADDR
*found_addrp
)
11319 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11320 struct remote_state
*rs
= get_remote_state ();
11321 int max_size
= get_memory_write_packet_size ();
11322 struct packet_config
*packet
=
11323 &remote_protocol_packets
[PACKET_qSearch_memory
];
11324 /* Number of packet bytes used to encode the pattern;
11325 this could be more than PATTERN_LEN due to escape characters. */
11326 int escaped_pattern_len
;
11327 /* Amount of pattern that was encodable in the packet. */
11328 int used_pattern_len
;
11331 ULONGEST found_addr
;
11333 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
11335 return (target_read (this, TARGET_OBJECT_MEMORY
, NULL
, result
, addr
, len
)
11339 /* Don't go to the target if we don't have to. This is done before
11340 checking packet_config_support to avoid the possibility that a
11341 success for this edge case means the facility works in
11343 if (pattern_len
> search_space_len
)
11345 if (pattern_len
== 0)
11347 *found_addrp
= start_addr
;
11351 /* If we already know the packet isn't supported, fall back to the simple
11352 way of searching memory. */
11354 if (packet_config_support (packet
) == PACKET_DISABLE
)
11356 /* Target doesn't provided special support, fall back and use the
11357 standard support (copy memory and do the search here). */
11358 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11359 pattern
, pattern_len
, found_addrp
);
11362 /* Make sure the remote is pointing at the right process. */
11363 set_general_process ();
11365 /* Insert header. */
11366 i
= snprintf (rs
->buf
.data (), max_size
,
11367 "qSearch:memory:%s;%s;",
11368 phex_nz (start_addr
, addr_size
),
11369 phex_nz (search_space_len
, sizeof (search_space_len
)));
11370 max_size
-= (i
+ 1);
11372 /* Escape as much data as fits into rs->buf. */
11373 escaped_pattern_len
=
11374 remote_escape_output (pattern
, pattern_len
, 1,
11375 (gdb_byte
*) rs
->buf
.data () + i
,
11376 &used_pattern_len
, max_size
);
11378 /* Bail if the pattern is too large. */
11379 if (used_pattern_len
!= pattern_len
)
11380 error (_("Pattern is too large to transmit to remote target."));
11382 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11383 || getpkt_sane (&rs
->buf
, 0) < 0
11384 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11386 /* The request may not have worked because the command is not
11387 supported. If so, fall back to the simple way. */
11388 if (packet_config_support (packet
) == PACKET_DISABLE
)
11390 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11391 pattern
, pattern_len
, found_addrp
);
11396 if (rs
->buf
[0] == '0')
11398 else if (rs
->buf
[0] == '1')
11401 if (rs
->buf
[1] != ',')
11402 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11403 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11404 *found_addrp
= found_addr
;
11407 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11413 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11415 struct remote_state
*rs
= get_remote_state ();
11416 char *p
= rs
->buf
.data ();
11418 if (!rs
->remote_desc
)
11419 error (_("remote rcmd is only available after target open"));
11421 /* Send a NULL command across as an empty command. */
11422 if (command
== NULL
)
11425 /* The query prefix. */
11426 strcpy (rs
->buf
.data (), "qRcmd,");
11427 p
= strchr (rs
->buf
.data (), '\0');
11429 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11430 > get_remote_packet_size ())
11431 error (_("\"monitor\" command ``%s'' is too long."), command
);
11433 /* Encode the actual command. */
11434 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11436 if (putpkt (rs
->buf
) < 0)
11437 error (_("Communication problem with target."));
11439 /* get/display the response */
11444 /* XXX - see also remote_get_noisy_reply(). */
11445 QUIT
; /* Allow user to bail out with ^C. */
11447 if (getpkt_sane (&rs
->buf
, 0) == -1)
11449 /* Timeout. Continue to (try to) read responses.
11450 This is better than stopping with an error, assuming the stub
11451 is still executing the (long) monitor command.
11452 If needed, the user can interrupt gdb using C-c, obtaining
11453 an effect similar to stop on timeout. */
11456 buf
= rs
->buf
.data ();
11457 if (buf
[0] == '\0')
11458 error (_("Target does not support this command."));
11459 if (buf
[0] == 'O' && buf
[1] != 'K')
11461 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11464 if (strcmp (buf
, "OK") == 0)
11466 if (strlen (buf
) == 3 && buf
[0] == 'E'
11467 && isdigit (buf
[1]) && isdigit (buf
[2]))
11469 error (_("Protocol error with Rcmd"));
11471 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11473 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11475 fputc_unfiltered (c
, outbuf
);
11481 std::vector
<mem_region
>
11482 remote_target::memory_map ()
11484 std::vector
<mem_region
> result
;
11485 gdb::optional
<gdb::char_vector
> text
11486 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP
, NULL
);
11489 result
= parse_memory_map (text
->data ());
11495 packet_command (const char *args
, int from_tty
)
11497 remote_target
*remote
= get_current_remote_target ();
11499 if (remote
== nullptr)
11500 error (_("command can only be used with remote target"));
11502 remote
->packet_command (args
, from_tty
);
11506 remote_target::packet_command (const char *args
, int from_tty
)
11509 error (_("remote-packet command requires packet text as argument"));
11511 puts_filtered ("sending: ");
11512 print_packet (args
);
11513 puts_filtered ("\n");
11516 remote_state
*rs
= get_remote_state ();
11518 getpkt (&rs
->buf
, 0);
11519 puts_filtered ("received: ");
11520 print_packet (rs
->buf
.data ());
11521 puts_filtered ("\n");
11525 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11527 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11529 static void threadset_test_cmd (char *cmd
, int tty
);
11531 static void threadalive_test (char *cmd
, int tty
);
11533 static void threadlist_test_cmd (char *cmd
, int tty
);
11535 int get_and_display_threadinfo (threadref
*ref
);
11537 static void threadinfo_test_cmd (char *cmd
, int tty
);
11539 static int thread_display_step (threadref
*ref
, void *context
);
11541 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11543 static void init_remote_threadtests (void);
11545 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11548 threadset_test_cmd (const char *cmd
, int tty
)
11550 int sample_thread
= SAMPLE_THREAD
;
11552 printf_filtered (_("Remote threadset test\n"));
11553 set_general_thread (sample_thread
);
11558 threadalive_test (const char *cmd
, int tty
)
11560 int sample_thread
= SAMPLE_THREAD
;
11561 int pid
= inferior_ptid
.pid ();
11562 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11564 if (remote_thread_alive (ptid
))
11565 printf_filtered ("PASS: Thread alive test\n");
11567 printf_filtered ("FAIL: Thread alive test\n");
11570 void output_threadid (char *title
, threadref
*ref
);
11573 output_threadid (char *title
, threadref
*ref
)
11577 pack_threadid (&hexid
[0], ref
); /* Convert thread id into hex. */
11579 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11583 threadlist_test_cmd (const char *cmd
, int tty
)
11586 threadref nextthread
;
11587 int done
, result_count
;
11588 threadref threadlist
[3];
11590 printf_filtered ("Remote Threadlist test\n");
11591 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11592 &result_count
, &threadlist
[0]))
11593 printf_filtered ("FAIL: threadlist test\n");
11596 threadref
*scan
= threadlist
;
11597 threadref
*limit
= scan
+ result_count
;
11599 while (scan
< limit
)
11600 output_threadid (" thread ", scan
++);
11605 display_thread_info (struct gdb_ext_thread_info
*info
)
11607 output_threadid ("Threadid: ", &info
->threadid
);
11608 printf_filtered ("Name: %s\n ", info
->shortname
);
11609 printf_filtered ("State: %s\n", info
->display
);
11610 printf_filtered ("other: %s\n\n", info
->more_display
);
11614 get_and_display_threadinfo (threadref
*ref
)
11618 struct gdb_ext_thread_info threadinfo
;
11620 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11621 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11622 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11623 display_thread_info (&threadinfo
);
11628 threadinfo_test_cmd (const char *cmd
, int tty
)
11630 int athread
= SAMPLE_THREAD
;
11634 int_to_threadref (&thread
, athread
);
11635 printf_filtered ("Remote Threadinfo test\n");
11636 if (!get_and_display_threadinfo (&thread
))
11637 printf_filtered ("FAIL cannot get thread info\n");
11641 thread_display_step (threadref
*ref
, void *context
)
11643 /* output_threadid(" threadstep ",ref); *//* simple test */
11644 return get_and_display_threadinfo (ref
);
11648 threadlist_update_test_cmd (const char *cmd
, int tty
)
11650 printf_filtered ("Remote Threadlist update test\n");
11651 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11655 init_remote_threadtests (void)
11657 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11658 _("Fetch and print the remote list of "
11659 "thread identifiers, one pkt only."));
11660 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11661 _("Fetch and display info about one thread."));
11662 add_com ("tset", class_obscure
, threadset_test_cmd
,
11663 _("Test setting to a different thread."));
11664 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11665 _("Iterate through updating all remote thread info."));
11666 add_com ("talive", class_obscure
, threadalive_test
,
11667 _("Remote thread alive test."));
11672 /* Convert a thread ID to a string. */
11675 remote_target::pid_to_str (ptid_t ptid
)
11677 struct remote_state
*rs
= get_remote_state ();
11679 if (ptid
== null_ptid
)
11680 return normal_pid_to_str (ptid
);
11681 else if (ptid
.is_pid ())
11683 /* Printing an inferior target id. */
11685 /* When multi-process extensions are off, there's no way in the
11686 remote protocol to know the remote process id, if there's any
11687 at all. There's one exception --- when we're connected with
11688 target extended-remote, and we manually attached to a process
11689 with "attach PID". We don't record anywhere a flag that
11690 allows us to distinguish that case from the case of
11691 connecting with extended-remote and the stub already being
11692 attached to a process, and reporting yes to qAttached, hence
11693 no smart special casing here. */
11694 if (!remote_multi_process_p (rs
))
11695 return "Remote target";
11697 return normal_pid_to_str (ptid
);
11701 if (magic_null_ptid
== ptid
)
11702 return "Thread <main>";
11703 else if (remote_multi_process_p (rs
))
11704 if (ptid
.lwp () == 0)
11705 return normal_pid_to_str (ptid
);
11707 return string_printf ("Thread %d.%ld",
11708 ptid
.pid (), ptid
.lwp ());
11710 return string_printf ("Thread %ld", ptid
.lwp ());
11714 /* Get the address of the thread local variable in OBJFILE which is
11715 stored at OFFSET within the thread local storage for thread PTID. */
11718 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11721 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11723 struct remote_state
*rs
= get_remote_state ();
11724 char *p
= rs
->buf
.data ();
11725 char *endp
= p
+ get_remote_packet_size ();
11726 enum packet_result result
;
11728 strcpy (p
, "qGetTLSAddr:");
11730 p
= write_ptid (p
, endp
, ptid
);
11732 p
+= hexnumstr (p
, offset
);
11734 p
+= hexnumstr (p
, lm
);
11738 getpkt (&rs
->buf
, 0);
11739 result
= packet_ok (rs
->buf
,
11740 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11741 if (result
== PACKET_OK
)
11745 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11748 else if (result
== PACKET_UNKNOWN
)
11749 throw_error (TLS_GENERIC_ERROR
,
11750 _("Remote target doesn't support qGetTLSAddr packet"));
11752 throw_error (TLS_GENERIC_ERROR
,
11753 _("Remote target failed to process qGetTLSAddr request"));
11756 throw_error (TLS_GENERIC_ERROR
,
11757 _("TLS not supported or disabled on this target"));
11762 /* Provide thread local base, i.e. Thread Information Block address.
11763 Returns 1 if ptid is found and thread_local_base is non zero. */
11766 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11768 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11770 struct remote_state
*rs
= get_remote_state ();
11771 char *p
= rs
->buf
.data ();
11772 char *endp
= p
+ get_remote_packet_size ();
11773 enum packet_result result
;
11775 strcpy (p
, "qGetTIBAddr:");
11777 p
= write_ptid (p
, endp
, ptid
);
11781 getpkt (&rs
->buf
, 0);
11782 result
= packet_ok (rs
->buf
,
11783 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11784 if (result
== PACKET_OK
)
11787 unpack_varlen_hex (rs
->buf
.data (), &val
);
11789 *addr
= (CORE_ADDR
) val
;
11792 else if (result
== PACKET_UNKNOWN
)
11793 error (_("Remote target doesn't support qGetTIBAddr packet"));
11795 error (_("Remote target failed to process qGetTIBAddr request"));
11798 error (_("qGetTIBAddr not supported or disabled on this target"));
11803 /* Support for inferring a target description based on the current
11804 architecture and the size of a 'g' packet. While the 'g' packet
11805 can have any size (since optional registers can be left off the
11806 end), some sizes are easily recognizable given knowledge of the
11807 approximate architecture. */
11809 struct remote_g_packet_guess
11811 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11818 const struct target_desc
*tdesc
;
11821 struct remote_g_packet_data
: public allocate_on_obstack
11823 std::vector
<remote_g_packet_guess
> guesses
;
11826 static struct gdbarch_data
*remote_g_packet_data_handle
;
11829 remote_g_packet_data_init (struct obstack
*obstack
)
11831 return new (obstack
) remote_g_packet_data
;
11835 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11836 const struct target_desc
*tdesc
)
11838 struct remote_g_packet_data
*data
11839 = ((struct remote_g_packet_data
*)
11840 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11842 gdb_assert (tdesc
!= NULL
);
11844 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11845 if (guess
.bytes
== bytes
)
11846 internal_error (__FILE__
, __LINE__
,
11847 _("Duplicate g packet description added for size %d"),
11850 data
->guesses
.emplace_back (bytes
, tdesc
);
11853 /* Return true if remote_read_description would do anything on this target
11854 and architecture, false otherwise. */
11857 remote_read_description_p (struct target_ops
*target
)
11859 struct remote_g_packet_data
*data
11860 = ((struct remote_g_packet_data
*)
11861 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11863 return !data
->guesses
.empty ();
11866 const struct target_desc
*
11867 remote_target::read_description ()
11869 struct remote_g_packet_data
*data
11870 = ((struct remote_g_packet_data
*)
11871 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11873 /* Do not try this during initial connection, when we do not know
11874 whether there is a running but stopped thread. */
11875 if (!target_has_execution () || inferior_ptid
== null_ptid
)
11876 return beneath ()->read_description ();
11878 if (!data
->guesses
.empty ())
11880 int bytes
= send_g_packet ();
11882 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11883 if (guess
.bytes
== bytes
)
11884 return guess
.tdesc
;
11886 /* We discard the g packet. A minor optimization would be to
11887 hold on to it, and fill the register cache once we have selected
11888 an architecture, but it's too tricky to do safely. */
11891 return beneath ()->read_description ();
11894 /* Remote file transfer support. This is host-initiated I/O, not
11895 target-initiated; for target-initiated, see remote-fileio.c. */
11897 /* If *LEFT is at least the length of STRING, copy STRING to
11898 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11899 decrease *LEFT. Otherwise raise an error. */
11902 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11904 int len
= strlen (string
);
11907 error (_("Packet too long for target."));
11909 memcpy (*buffer
, string
, len
);
11913 /* NUL-terminate the buffer as a convenience, if there is
11919 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11920 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11921 decrease *LEFT. Otherwise raise an error. */
11924 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11927 if (2 * len
> *left
)
11928 error (_("Packet too long for target."));
11930 bin2hex (bytes
, *buffer
, len
);
11931 *buffer
+= 2 * len
;
11934 /* NUL-terminate the buffer as a convenience, if there is
11940 /* If *LEFT is large enough, convert VALUE to hex and add it to
11941 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11942 decrease *LEFT. Otherwise raise an error. */
11945 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11947 int len
= hexnumlen (value
);
11950 error (_("Packet too long for target."));
11952 hexnumstr (*buffer
, value
);
11956 /* NUL-terminate the buffer as a convenience, if there is
11962 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11963 value, *REMOTE_ERRNO to the remote error number or zero if none
11964 was included, and *ATTACHMENT to point to the start of the annex
11965 if any. The length of the packet isn't needed here; there may
11966 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11968 Return 0 if the packet could be parsed, -1 if it could not. If
11969 -1 is returned, the other variables may not be initialized. */
11972 remote_hostio_parse_result (const char *buffer
, int *retcode
,
11973 int *remote_errno
, const char **attachment
)
11978 *attachment
= NULL
;
11980 if (buffer
[0] != 'F')
11984 *retcode
= strtol (&buffer
[1], &p
, 16);
11985 if (errno
!= 0 || p
== &buffer
[1])
11988 /* Check for ",errno". */
11992 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11993 if (errno
!= 0 || p
+ 1 == p2
)
11998 /* Check for ";attachment". If there is no attachment, the
11999 packet should end here. */
12002 *attachment
= p
+ 1;
12005 else if (*p
== '\0')
12011 /* Send a prepared I/O packet to the target and read its response.
12012 The prepared packet is in the global RS->BUF before this function
12013 is called, and the answer is there when we return.
12015 COMMAND_BYTES is the length of the request to send, which may include
12016 binary data. WHICH_PACKET is the packet configuration to check
12017 before attempting a packet. If an error occurs, *REMOTE_ERRNO
12018 is set to the error number and -1 is returned. Otherwise the value
12019 returned by the function is returned.
12021 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
12022 attachment is expected; an error will be reported if there's a
12023 mismatch. If one is found, *ATTACHMENT will be set to point into
12024 the packet buffer and *ATTACHMENT_LEN will be set to the
12025 attachment's length. */
12028 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
12029 int *remote_errno
, const char **attachment
,
12030 int *attachment_len
)
12032 struct remote_state
*rs
= get_remote_state ();
12033 int ret
, bytes_read
;
12034 const char *attachment_tmp
;
12036 if (packet_support (which_packet
) == PACKET_DISABLE
)
12038 *remote_errno
= FILEIO_ENOSYS
;
12042 putpkt_binary (rs
->buf
.data (), command_bytes
);
12043 bytes_read
= getpkt_sane (&rs
->buf
, 0);
12045 /* If it timed out, something is wrong. Don't try to parse the
12047 if (bytes_read
< 0)
12049 *remote_errno
= FILEIO_EINVAL
;
12053 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
12056 *remote_errno
= FILEIO_EINVAL
;
12058 case PACKET_UNKNOWN
:
12059 *remote_errno
= FILEIO_ENOSYS
;
12065 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
12068 *remote_errno
= FILEIO_EINVAL
;
12072 /* Make sure we saw an attachment if and only if we expected one. */
12073 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
12074 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
12076 *remote_errno
= FILEIO_EINVAL
;
12080 /* If an attachment was found, it must point into the packet buffer;
12081 work out how many bytes there were. */
12082 if (attachment_tmp
!= NULL
)
12084 *attachment
= attachment_tmp
;
12085 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
12091 /* See declaration.h. */
12094 readahead_cache::invalidate ()
12099 /* See declaration.h. */
12102 readahead_cache::invalidate_fd (int fd
)
12104 if (this->fd
== fd
)
12108 /* Set the filesystem remote_hostio functions that take FILENAME
12109 arguments will use. Return 0 on success, or -1 if an error
12110 occurs (and set *REMOTE_ERRNO). */
12113 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
12116 struct remote_state
*rs
= get_remote_state ();
12117 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
12118 char *p
= rs
->buf
.data ();
12119 int left
= get_remote_packet_size () - 1;
12123 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12126 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
12129 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
12131 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
12132 remote_buffer_add_string (&p
, &left
, arg
);
12134 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
12135 remote_errno
, NULL
, NULL
);
12137 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12141 rs
->fs_pid
= required_pid
;
12146 /* Implementation of to_fileio_open. */
12149 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
12150 int flags
, int mode
, int warn_if_slow
,
12153 struct remote_state
*rs
= get_remote_state ();
12154 char *p
= rs
->buf
.data ();
12155 int left
= get_remote_packet_size () - 1;
12159 static int warning_issued
= 0;
12161 printf_unfiltered (_("Reading %s from remote target...\n"),
12164 if (!warning_issued
)
12166 warning (_("File transfers from remote targets can be slow."
12167 " Use \"set sysroot\" to access files locally"
12169 warning_issued
= 1;
12173 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12176 remote_buffer_add_string (&p
, &left
, "vFile:open:");
12178 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12179 strlen (filename
));
12180 remote_buffer_add_string (&p
, &left
, ",");
12182 remote_buffer_add_int (&p
, &left
, flags
);
12183 remote_buffer_add_string (&p
, &left
, ",");
12185 remote_buffer_add_int (&p
, &left
, mode
);
12187 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
12188 remote_errno
, NULL
, NULL
);
12192 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
12193 int flags
, int mode
, int warn_if_slow
,
12196 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
12200 /* Implementation of to_fileio_pwrite. */
12203 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12204 ULONGEST offset
, int *remote_errno
)
12206 struct remote_state
*rs
= get_remote_state ();
12207 char *p
= rs
->buf
.data ();
12208 int left
= get_remote_packet_size ();
12211 rs
->readahead_cache
.invalidate_fd (fd
);
12213 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
12215 remote_buffer_add_int (&p
, &left
, fd
);
12216 remote_buffer_add_string (&p
, &left
, ",");
12218 remote_buffer_add_int (&p
, &left
, offset
);
12219 remote_buffer_add_string (&p
, &left
, ",");
12221 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
12222 (get_remote_packet_size ()
12223 - (p
- rs
->buf
.data ())));
12225 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
12226 remote_errno
, NULL
, NULL
);
12230 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12231 ULONGEST offset
, int *remote_errno
)
12233 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12236 /* Helper for the implementation of to_fileio_pread. Read the file
12237 from the remote side with vFile:pread. */
12240 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12241 ULONGEST offset
, int *remote_errno
)
12243 struct remote_state
*rs
= get_remote_state ();
12244 char *p
= rs
->buf
.data ();
12245 const char *attachment
;
12246 int left
= get_remote_packet_size ();
12247 int ret
, attachment_len
;
12250 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12252 remote_buffer_add_int (&p
, &left
, fd
);
12253 remote_buffer_add_string (&p
, &left
, ",");
12255 remote_buffer_add_int (&p
, &left
, len
);
12256 remote_buffer_add_string (&p
, &left
, ",");
12258 remote_buffer_add_int (&p
, &left
, offset
);
12260 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
12261 remote_errno
, &attachment
,
12267 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12269 if (read_len
!= ret
)
12270 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12275 /* See declaration.h. */
12278 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12282 && this->offset
<= offset
12283 && offset
< this->offset
+ this->bufsize
)
12285 ULONGEST max
= this->offset
+ this->bufsize
;
12287 if (offset
+ len
> max
)
12288 len
= max
- offset
;
12290 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12297 /* Implementation of to_fileio_pread. */
12300 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12301 ULONGEST offset
, int *remote_errno
)
12304 struct remote_state
*rs
= get_remote_state ();
12305 readahead_cache
*cache
= &rs
->readahead_cache
;
12307 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12310 cache
->hit_count
++;
12313 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
12314 pulongest (cache
->hit_count
));
12318 cache
->miss_count
++;
12320 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
12321 pulongest (cache
->miss_count
));
12324 cache
->offset
= offset
;
12325 cache
->bufsize
= get_remote_packet_size ();
12326 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12328 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12329 cache
->offset
, remote_errno
);
12332 cache
->invalidate_fd (fd
);
12336 cache
->bufsize
= ret
;
12337 return cache
->pread (fd
, read_buf
, len
, offset
);
12341 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12342 ULONGEST offset
, int *remote_errno
)
12344 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12347 /* Implementation of to_fileio_close. */
12350 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12352 struct remote_state
*rs
= get_remote_state ();
12353 char *p
= rs
->buf
.data ();
12354 int left
= get_remote_packet_size () - 1;
12356 rs
->readahead_cache
.invalidate_fd (fd
);
12358 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12360 remote_buffer_add_int (&p
, &left
, fd
);
12362 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12363 remote_errno
, NULL
, NULL
);
12367 remote_target::fileio_close (int fd
, int *remote_errno
)
12369 return remote_hostio_close (fd
, remote_errno
);
12372 /* Implementation of to_fileio_unlink. */
12375 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12378 struct remote_state
*rs
= get_remote_state ();
12379 char *p
= rs
->buf
.data ();
12380 int left
= get_remote_packet_size () - 1;
12382 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12385 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12387 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12388 strlen (filename
));
12390 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12391 remote_errno
, NULL
, NULL
);
12395 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12398 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12401 /* Implementation of to_fileio_readlink. */
12403 gdb::optional
<std::string
>
12404 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12407 struct remote_state
*rs
= get_remote_state ();
12408 char *p
= rs
->buf
.data ();
12409 const char *attachment
;
12410 int left
= get_remote_packet_size ();
12411 int len
, attachment_len
;
12414 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12417 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12419 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12420 strlen (filename
));
12422 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12423 remote_errno
, &attachment
,
12429 std::string
ret (len
, '\0');
12431 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12432 (gdb_byte
*) &ret
[0], len
);
12433 if (read_len
!= len
)
12434 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12439 /* Implementation of to_fileio_fstat. */
12442 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12444 struct remote_state
*rs
= get_remote_state ();
12445 char *p
= rs
->buf
.data ();
12446 int left
= get_remote_packet_size ();
12447 int attachment_len
, ret
;
12448 const char *attachment
;
12449 struct fio_stat fst
;
12452 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12454 remote_buffer_add_int (&p
, &left
, fd
);
12456 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12457 remote_errno
, &attachment
,
12461 if (*remote_errno
!= FILEIO_ENOSYS
)
12464 /* Strictly we should return -1, ENOSYS here, but when
12465 "set sysroot remote:" was implemented in August 2008
12466 BFD's need for a stat function was sidestepped with
12467 this hack. This was not remedied until March 2015
12468 so we retain the previous behavior to avoid breaking
12471 Note that the memset is a March 2015 addition; older
12472 GDBs set st_size *and nothing else* so the structure
12473 would have garbage in all other fields. This might
12474 break something but retaining the previous behavior
12475 here would be just too wrong. */
12477 memset (st
, 0, sizeof (struct stat
));
12478 st
->st_size
= INT_MAX
;
12482 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12483 (gdb_byte
*) &fst
, sizeof (fst
));
12485 if (read_len
!= ret
)
12486 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12488 if (read_len
!= sizeof (fst
))
12489 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12490 read_len
, (int) sizeof (fst
));
12492 remote_fileio_to_host_stat (&fst
, st
);
12497 /* Implementation of to_filesystem_is_local. */
12500 remote_target::filesystem_is_local ()
12502 /* Valgrind GDB presents itself as a remote target but works
12503 on the local filesystem: it does not implement remote get
12504 and users are not expected to set a sysroot. To handle
12505 this case we treat the remote filesystem as local if the
12506 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12507 does not support vFile:open. */
12508 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12510 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12512 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12514 int fd
, remote_errno
;
12516 /* Try opening a file to probe support. The supplied
12517 filename is irrelevant, we only care about whether
12518 the stub recognizes the packet or not. */
12519 fd
= remote_hostio_open (NULL
, "just probing",
12520 FILEIO_O_RDONLY
, 0700, 0,
12524 remote_hostio_close (fd
, &remote_errno
);
12526 ps
= packet_support (PACKET_vFile_open
);
12529 if (ps
== PACKET_DISABLE
)
12531 static int warning_issued
= 0;
12533 if (!warning_issued
)
12535 warning (_("remote target does not support file"
12536 " transfer, attempting to access files"
12537 " from local filesystem."));
12538 warning_issued
= 1;
12549 remote_fileio_errno_to_host (int errnum
)
12555 case FILEIO_ENOENT
:
12563 case FILEIO_EACCES
:
12565 case FILEIO_EFAULT
:
12569 case FILEIO_EEXIST
:
12571 case FILEIO_ENODEV
:
12573 case FILEIO_ENOTDIR
:
12575 case FILEIO_EISDIR
:
12577 case FILEIO_EINVAL
:
12579 case FILEIO_ENFILE
:
12581 case FILEIO_EMFILE
:
12585 case FILEIO_ENOSPC
:
12587 case FILEIO_ESPIPE
:
12591 case FILEIO_ENOSYS
:
12593 case FILEIO_ENAMETOOLONG
:
12594 return ENAMETOOLONG
;
12600 remote_hostio_error (int errnum
)
12602 int host_error
= remote_fileio_errno_to_host (errnum
);
12604 if (host_error
== -1)
12605 error (_("Unknown remote I/O error %d"), errnum
);
12607 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12610 /* A RAII wrapper around a remote file descriptor. */
12612 class scoped_remote_fd
12615 scoped_remote_fd (remote_target
*remote
, int fd
)
12616 : m_remote (remote
), m_fd (fd
)
12620 ~scoped_remote_fd ()
12627 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12631 /* Swallow exception before it escapes the dtor. If
12632 something goes wrong, likely the connection is gone,
12633 and there's nothing else that can be done. */
12638 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12640 /* Release ownership of the file descriptor, and return it. */
12641 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12648 /* Return the owned file descriptor. */
12649 int get () const noexcept
12655 /* The remote target. */
12656 remote_target
*m_remote
;
12658 /* The owned remote I/O file descriptor. */
12663 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12665 remote_target
*remote
= get_current_remote_target ();
12667 if (remote
== nullptr)
12668 error (_("command can only be used with remote target"));
12670 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12674 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12677 int retcode
, remote_errno
, bytes
, io_size
;
12678 int bytes_in_buffer
;
12682 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12684 perror_with_name (local_file
);
12686 scoped_remote_fd fd
12687 (this, remote_hostio_open (NULL
,
12688 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12690 0700, 0, &remote_errno
));
12691 if (fd
.get () == -1)
12692 remote_hostio_error (remote_errno
);
12694 /* Send up to this many bytes at once. They won't all fit in the
12695 remote packet limit, so we'll transfer slightly fewer. */
12696 io_size
= get_remote_packet_size ();
12697 gdb::byte_vector
buffer (io_size
);
12699 bytes_in_buffer
= 0;
12702 while (bytes_in_buffer
|| !saw_eof
)
12706 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12707 io_size
- bytes_in_buffer
,
12711 if (ferror (file
.get ()))
12712 error (_("Error reading %s."), local_file
);
12715 /* EOF. Unless there is something still in the
12716 buffer from the last iteration, we are done. */
12718 if (bytes_in_buffer
== 0)
12726 bytes
+= bytes_in_buffer
;
12727 bytes_in_buffer
= 0;
12729 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12730 offset
, &remote_errno
);
12733 remote_hostio_error (remote_errno
);
12734 else if (retcode
== 0)
12735 error (_("Remote write of %d bytes returned 0!"), bytes
);
12736 else if (retcode
< bytes
)
12738 /* Short write. Save the rest of the read data for the next
12740 bytes_in_buffer
= bytes
- retcode
;
12741 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12747 if (remote_hostio_close (fd
.release (), &remote_errno
))
12748 remote_hostio_error (remote_errno
);
12751 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12755 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12757 remote_target
*remote
= get_current_remote_target ();
12759 if (remote
== nullptr)
12760 error (_("command can only be used with remote target"));
12762 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12766 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12769 int remote_errno
, bytes
, io_size
;
12772 scoped_remote_fd fd
12773 (this, remote_hostio_open (NULL
,
12774 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12776 if (fd
.get () == -1)
12777 remote_hostio_error (remote_errno
);
12779 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12781 perror_with_name (local_file
);
12783 /* Send up to this many bytes at once. They won't all fit in the
12784 remote packet limit, so we'll transfer slightly fewer. */
12785 io_size
= get_remote_packet_size ();
12786 gdb::byte_vector
buffer (io_size
);
12791 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12794 /* Success, but no bytes, means end-of-file. */
12797 remote_hostio_error (remote_errno
);
12801 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12803 perror_with_name (local_file
);
12806 if (remote_hostio_close (fd
.release (), &remote_errno
))
12807 remote_hostio_error (remote_errno
);
12810 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12814 remote_file_delete (const char *remote_file
, int from_tty
)
12816 remote_target
*remote
= get_current_remote_target ();
12818 if (remote
== nullptr)
12819 error (_("command can only be used with remote target"));
12821 remote
->remote_file_delete (remote_file
, from_tty
);
12825 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12827 int retcode
, remote_errno
;
12829 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12831 remote_hostio_error (remote_errno
);
12834 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12838 remote_put_command (const char *args
, int from_tty
)
12841 error_no_arg (_("file to put"));
12843 gdb_argv
argv (args
);
12844 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12845 error (_("Invalid parameters to remote put"));
12847 remote_file_put (argv
[0], argv
[1], from_tty
);
12851 remote_get_command (const char *args
, int from_tty
)
12854 error_no_arg (_("file to get"));
12856 gdb_argv
argv (args
);
12857 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12858 error (_("Invalid parameters to remote get"));
12860 remote_file_get (argv
[0], argv
[1], from_tty
);
12864 remote_delete_command (const char *args
, int from_tty
)
12867 error_no_arg (_("file to delete"));
12869 gdb_argv
argv (args
);
12870 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12871 error (_("Invalid parameters to remote delete"));
12873 remote_file_delete (argv
[0], from_tty
);
12877 remote_target::can_execute_reverse ()
12879 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12880 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12887 remote_target::supports_non_stop ()
12893 remote_target::supports_disable_randomization ()
12895 /* Only supported in extended mode. */
12900 remote_target::supports_multi_process ()
12902 struct remote_state
*rs
= get_remote_state ();
12904 return remote_multi_process_p (rs
);
12908 remote_supports_cond_tracepoints ()
12910 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12914 remote_target::supports_evaluation_of_breakpoint_conditions ()
12916 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12920 remote_supports_fast_tracepoints ()
12922 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12926 remote_supports_static_tracepoints ()
12928 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12932 remote_supports_install_in_trace ()
12934 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12938 remote_target::supports_enable_disable_tracepoint ()
12940 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12945 remote_target::supports_string_tracing ()
12947 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12951 remote_target::can_run_breakpoint_commands ()
12953 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12957 remote_target::trace_init ()
12959 struct remote_state
*rs
= get_remote_state ();
12962 remote_get_noisy_reply ();
12963 if (strcmp (rs
->buf
.data (), "OK") != 0)
12964 error (_("Target does not support this command."));
12967 /* Recursive routine to walk through command list including loops, and
12968 download packets for each command. */
12971 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
12972 struct command_line
*cmds
)
12974 struct remote_state
*rs
= get_remote_state ();
12975 struct command_line
*cmd
;
12977 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12979 QUIT
; /* Allow user to bail out with ^C. */
12980 strcpy (rs
->buf
.data (), "QTDPsrc:");
12981 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12982 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12983 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12985 remote_get_noisy_reply ();
12986 if (strcmp (rs
->buf
.data (), "OK"))
12987 warning (_("Target does not support source download."));
12989 if (cmd
->control_type
== while_control
12990 || cmd
->control_type
== while_stepping_control
)
12992 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
12994 QUIT
; /* Allow user to bail out with ^C. */
12995 strcpy (rs
->buf
.data (), "QTDPsrc:");
12996 encode_source_string (num
, addr
, "cmd", "end",
12997 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12998 rs
->buf
.size () - strlen (rs
->buf
.data ()));
13000 remote_get_noisy_reply ();
13001 if (strcmp (rs
->buf
.data (), "OK"))
13002 warning (_("Target does not support source download."));
13008 remote_target::download_tracepoint (struct bp_location
*loc
)
13012 std::vector
<std::string
> tdp_actions
;
13013 std::vector
<std::string
> stepping_actions
;
13015 struct breakpoint
*b
= loc
->owner
;
13016 struct tracepoint
*t
= (struct tracepoint
*) b
;
13017 struct remote_state
*rs
= get_remote_state ();
13019 const char *err_msg
= _("Tracepoint packet too large for target.");
13022 /* We use a buffer other than rs->buf because we'll build strings
13023 across multiple statements, and other statements in between could
13025 gdb::char_vector
buf (get_remote_packet_size ());
13027 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
13029 tpaddr
= loc
->address
;
13030 strcpy (addrbuf
, phex (tpaddr
, sizeof (CORE_ADDR
)));
13031 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
13032 b
->number
, addrbuf
, /* address */
13033 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
13034 t
->step_count
, t
->pass_count
);
13036 if (ret
< 0 || ret
>= buf
.size ())
13037 error ("%s", err_msg
);
13039 /* Fast tracepoints are mostly handled by the target, but we can
13040 tell the target how big of an instruction block should be moved
13042 if (b
->type
== bp_fast_tracepoint
)
13044 /* Only test for support at download time; we may not know
13045 target capabilities at definition time. */
13046 if (remote_supports_fast_tracepoints ())
13048 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
13051 size_left
= buf
.size () - strlen (buf
.data ());
13052 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13054 gdb_insn_length (loc
->gdbarch
, tpaddr
));
13056 if (ret
< 0 || ret
>= size_left
)
13057 error ("%s", err_msg
);
13060 /* If it passed validation at definition but fails now,
13061 something is very wrong. */
13062 internal_error (__FILE__
, __LINE__
,
13063 _("Fast tracepoint not "
13064 "valid during download"));
13067 /* Fast tracepoints are functionally identical to regular
13068 tracepoints, so don't take lack of support as a reason to
13069 give up on the trace run. */
13070 warning (_("Target does not support fast tracepoints, "
13071 "downloading %d as regular tracepoint"), b
->number
);
13073 else if (b
->type
== bp_static_tracepoint
)
13075 /* Only test for support at download time; we may not know
13076 target capabilities at definition time. */
13077 if (remote_supports_static_tracepoints ())
13079 struct static_tracepoint_marker marker
;
13081 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
13083 size_left
= buf
.size () - strlen (buf
.data ());
13084 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13087 if (ret
< 0 || ret
>= size_left
)
13088 error ("%s", err_msg
);
13091 error (_("Static tracepoint not valid during download"));
13094 /* Fast tracepoints are functionally identical to regular
13095 tracepoints, so don't take lack of support as a reason
13096 to give up on the trace run. */
13097 error (_("Target does not support static tracepoints"));
13099 /* If the tracepoint has a conditional, make it into an agent
13100 expression and append to the definition. */
13103 /* Only test support at download time, we may not know target
13104 capabilities at definition time. */
13105 if (remote_supports_cond_tracepoints ())
13107 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
13110 size_left
= buf
.size () - strlen (buf
.data ());
13112 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13113 size_left
, ":X%x,", aexpr
->len
);
13115 if (ret
< 0 || ret
>= size_left
)
13116 error ("%s", err_msg
);
13118 size_left
= buf
.size () - strlen (buf
.data ());
13120 /* Two bytes to encode each aexpr byte, plus the terminating
13122 if (aexpr
->len
* 2 + 1 > size_left
)
13123 error ("%s", err_msg
);
13125 pkt
= buf
.data () + strlen (buf
.data ());
13127 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
13128 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
13132 warning (_("Target does not support conditional tracepoints, "
13133 "ignoring tp %d cond"), b
->number
);
13136 if (b
->commands
|| *default_collect
)
13138 size_left
= buf
.size () - strlen (buf
.data ());
13140 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13143 if (ret
< 0 || ret
>= size_left
)
13144 error ("%s", err_msg
);
13147 putpkt (buf
.data ());
13148 remote_get_noisy_reply ();
13149 if (strcmp (rs
->buf
.data (), "OK"))
13150 error (_("Target does not support tracepoints."));
13152 /* do_single_steps (t); */
13153 for (auto action_it
= tdp_actions
.begin ();
13154 action_it
!= tdp_actions
.end (); action_it
++)
13156 QUIT
; /* Allow user to bail out with ^C. */
13158 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
13159 || !stepping_actions
.empty ());
13161 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
13162 b
->number
, addrbuf
, /* address */
13163 action_it
->c_str (),
13164 has_more
? '-' : 0);
13166 if (ret
< 0 || ret
>= buf
.size ())
13167 error ("%s", err_msg
);
13169 putpkt (buf
.data ());
13170 remote_get_noisy_reply ();
13171 if (strcmp (rs
->buf
.data (), "OK"))
13172 error (_("Error on target while setting tracepoints."));
13175 for (auto action_it
= stepping_actions
.begin ();
13176 action_it
!= stepping_actions
.end (); action_it
++)
13178 QUIT
; /* Allow user to bail out with ^C. */
13180 bool is_first
= action_it
== stepping_actions
.begin ();
13181 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
13183 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
13184 b
->number
, addrbuf
, /* address */
13185 is_first
? "S" : "",
13186 action_it
->c_str (),
13187 has_more
? "-" : "");
13189 if (ret
< 0 || ret
>= buf
.size ())
13190 error ("%s", err_msg
);
13192 putpkt (buf
.data ());
13193 remote_get_noisy_reply ();
13194 if (strcmp (rs
->buf
.data (), "OK"))
13195 error (_("Error on target while setting tracepoints."));
13198 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
13200 if (b
->location
!= NULL
)
13202 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13204 if (ret
< 0 || ret
>= buf
.size ())
13205 error ("%s", err_msg
);
13207 encode_source_string (b
->number
, loc
->address
, "at",
13208 event_location_to_string (b
->location
.get ()),
13209 buf
.data () + strlen (buf
.data ()),
13210 buf
.size () - strlen (buf
.data ()));
13211 putpkt (buf
.data ());
13212 remote_get_noisy_reply ();
13213 if (strcmp (rs
->buf
.data (), "OK"))
13214 warning (_("Target does not support source download."));
13216 if (b
->cond_string
)
13218 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13220 if (ret
< 0 || ret
>= buf
.size ())
13221 error ("%s", err_msg
);
13223 encode_source_string (b
->number
, loc
->address
,
13224 "cond", b
->cond_string
,
13225 buf
.data () + strlen (buf
.data ()),
13226 buf
.size () - strlen (buf
.data ()));
13227 putpkt (buf
.data ());
13228 remote_get_noisy_reply ();
13229 if (strcmp (rs
->buf
.data (), "OK"))
13230 warning (_("Target does not support source download."));
13232 remote_download_command_source (b
->number
, loc
->address
,
13233 breakpoint_commands (b
));
13238 remote_target::can_download_tracepoint ()
13240 struct remote_state
*rs
= get_remote_state ();
13241 struct trace_status
*ts
;
13244 /* Don't try to install tracepoints until we've relocated our
13245 symbols, and fetched and merged the target's tracepoint list with
13247 if (rs
->starting_up
)
13250 ts
= current_trace_status ();
13251 status
= get_trace_status (ts
);
13253 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13256 /* If we are in a tracing experiment, but remote stub doesn't support
13257 installing tracepoint in trace, we have to return. */
13258 if (!remote_supports_install_in_trace ())
13266 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13268 struct remote_state
*rs
= get_remote_state ();
13271 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13272 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13274 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13275 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13276 >= get_remote_packet_size ())
13277 error (_("Trace state variable name too long for tsv definition packet"));
13278 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13281 remote_get_noisy_reply ();
13282 if (rs
->buf
[0] == '\0')
13283 error (_("Target does not support this command."));
13284 if (strcmp (rs
->buf
.data (), "OK") != 0)
13285 error (_("Error on target while downloading trace state variable."));
13289 remote_target::enable_tracepoint (struct bp_location
*location
)
13291 struct remote_state
*rs
= get_remote_state ();
13293 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13294 location
->owner
->number
,
13295 phex (location
->address
, sizeof (CORE_ADDR
)));
13297 remote_get_noisy_reply ();
13298 if (rs
->buf
[0] == '\0')
13299 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13300 if (strcmp (rs
->buf
.data (), "OK") != 0)
13301 error (_("Error on target while enabling tracepoint."));
13305 remote_target::disable_tracepoint (struct bp_location
*location
)
13307 struct remote_state
*rs
= get_remote_state ();
13309 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13310 location
->owner
->number
,
13311 phex (location
->address
, sizeof (CORE_ADDR
)));
13313 remote_get_noisy_reply ();
13314 if (rs
->buf
[0] == '\0')
13315 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13316 if (strcmp (rs
->buf
.data (), "OK") != 0)
13317 error (_("Error on target while disabling tracepoint."));
13321 remote_target::trace_set_readonly_regions ()
13324 bfd_size_type size
;
13329 if (!current_program_space
->exec_bfd ())
13330 return; /* No information to give. */
13332 struct remote_state
*rs
= get_remote_state ();
13334 strcpy (rs
->buf
.data (), "QTro");
13335 offset
= strlen (rs
->buf
.data ());
13336 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
13338 char tmp1
[40], tmp2
[40];
13341 if ((s
->flags
& SEC_LOAD
) == 0 ||
13342 /* (s->flags & SEC_CODE) == 0 || */
13343 (s
->flags
& SEC_READONLY
) == 0)
13347 vma
= bfd_section_vma (s
);
13348 size
= bfd_section_size (s
);
13349 sprintf_vma (tmp1
, vma
);
13350 sprintf_vma (tmp2
, vma
+ size
);
13351 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13352 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13354 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13356 Too many sections for read-only sections definition packet."));
13359 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13361 offset
+= sec_length
;
13366 getpkt (&rs
->buf
, 0);
13371 remote_target::trace_start ()
13373 struct remote_state
*rs
= get_remote_state ();
13375 putpkt ("QTStart");
13376 remote_get_noisy_reply ();
13377 if (rs
->buf
[0] == '\0')
13378 error (_("Target does not support this command."));
13379 if (strcmp (rs
->buf
.data (), "OK") != 0)
13380 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13384 remote_target::get_trace_status (struct trace_status
*ts
)
13386 /* Initialize it just to avoid a GCC false warning. */
13388 enum packet_result result
;
13389 struct remote_state
*rs
= get_remote_state ();
13391 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13394 /* FIXME we need to get register block size some other way. */
13395 trace_regblock_size
13396 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13398 putpkt ("qTStatus");
13402 p
= remote_get_noisy_reply ();
13404 catch (const gdb_exception_error
&ex
)
13406 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13408 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13414 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13416 /* If the remote target doesn't do tracing, flag it. */
13417 if (result
== PACKET_UNKNOWN
)
13420 /* We're working with a live target. */
13421 ts
->filename
= NULL
;
13424 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13426 /* Function 'parse_trace_status' sets default value of each field of
13427 'ts' at first, so we don't have to do it here. */
13428 parse_trace_status (p
, ts
);
13430 return ts
->running
;
13434 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13435 struct uploaded_tp
*utp
)
13437 struct remote_state
*rs
= get_remote_state ();
13439 struct bp_location
*loc
;
13440 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13441 size_t size
= get_remote_packet_size ();
13446 tp
->traceframe_usage
= 0;
13447 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
13449 /* If the tracepoint was never downloaded, don't go asking for
13451 if (tp
->number_on_target
== 0)
13453 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13454 phex_nz (loc
->address
, 0));
13456 reply
= remote_get_noisy_reply ();
13457 if (reply
&& *reply
)
13460 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13466 utp
->hit_count
= 0;
13467 utp
->traceframe_usage
= 0;
13468 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13469 phex_nz (utp
->addr
, 0));
13471 reply
= remote_get_noisy_reply ();
13472 if (reply
&& *reply
)
13475 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13481 remote_target::trace_stop ()
13483 struct remote_state
*rs
= get_remote_state ();
13486 remote_get_noisy_reply ();
13487 if (rs
->buf
[0] == '\0')
13488 error (_("Target does not support this command."));
13489 if (strcmp (rs
->buf
.data (), "OK") != 0)
13490 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13494 remote_target::trace_find (enum trace_find_type type
, int num
,
13495 CORE_ADDR addr1
, CORE_ADDR addr2
,
13498 struct remote_state
*rs
= get_remote_state ();
13499 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13501 int target_frameno
= -1, target_tracept
= -1;
13503 /* Lookups other than by absolute frame number depend on the current
13504 trace selected, so make sure it is correct on the remote end
13506 if (type
!= tfind_number
)
13507 set_remote_traceframe ();
13509 p
= rs
->buf
.data ();
13510 strcpy (p
, "QTFrame:");
13511 p
= strchr (p
, '\0');
13515 xsnprintf (p
, endbuf
- p
, "%x", num
);
13518 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13521 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13524 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13525 phex_nz (addr2
, 0));
13527 case tfind_outside
:
13528 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13529 phex_nz (addr2
, 0));
13532 error (_("Unknown trace find type %d"), type
);
13536 reply
= remote_get_noisy_reply ();
13537 if (*reply
== '\0')
13538 error (_("Target does not support this command."));
13540 while (reply
&& *reply
)
13545 target_frameno
= (int) strtol (p
, &reply
, 16);
13547 error (_("Unable to parse trace frame number"));
13548 /* Don't update our remote traceframe number cache on failure
13549 to select a remote traceframe. */
13550 if (target_frameno
== -1)
13555 target_tracept
= (int) strtol (p
, &reply
, 16);
13557 error (_("Unable to parse tracepoint number"));
13559 case 'O': /* "OK"? */
13560 if (reply
[1] == 'K' && reply
[2] == '\0')
13563 error (_("Bogus reply from target: %s"), reply
);
13566 error (_("Bogus reply from target: %s"), reply
);
13569 *tpp
= target_tracept
;
13571 rs
->remote_traceframe_number
= target_frameno
;
13572 return target_frameno
;
13576 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13578 struct remote_state
*rs
= get_remote_state ();
13582 set_remote_traceframe ();
13584 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13586 reply
= remote_get_noisy_reply ();
13587 if (reply
&& *reply
)
13591 unpack_varlen_hex (reply
+ 1, &uval
);
13592 *val
= (LONGEST
) uval
;
13600 remote_target::save_trace_data (const char *filename
)
13602 struct remote_state
*rs
= get_remote_state ();
13605 p
= rs
->buf
.data ();
13606 strcpy (p
, "QTSave:");
13608 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13609 >= get_remote_packet_size ())
13610 error (_("Remote file name too long for trace save packet"));
13611 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13614 reply
= remote_get_noisy_reply ();
13615 if (*reply
== '\0')
13616 error (_("Target does not support this command."));
13617 if (strcmp (reply
, "OK") != 0)
13618 error (_("Bogus reply from target: %s"), reply
);
13622 /* This is basically a memory transfer, but needs to be its own packet
13623 because we don't know how the target actually organizes its trace
13624 memory, plus we want to be able to ask for as much as possible, but
13625 not be unhappy if we don't get as much as we ask for. */
13628 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13630 struct remote_state
*rs
= get_remote_state ();
13635 p
= rs
->buf
.data ();
13636 strcpy (p
, "qTBuffer:");
13638 p
+= hexnumstr (p
, offset
);
13640 p
+= hexnumstr (p
, len
);
13644 reply
= remote_get_noisy_reply ();
13645 if (reply
&& *reply
)
13647 /* 'l' by itself means we're at the end of the buffer and
13648 there is nothing more to get. */
13652 /* Convert the reply into binary. Limit the number of bytes to
13653 convert according to our passed-in buffer size, rather than
13654 what was returned in the packet; if the target is
13655 unexpectedly generous and gives us a bigger reply than we
13656 asked for, we don't want to crash. */
13657 rslt
= hex2bin (reply
, buf
, len
);
13661 /* Something went wrong, flag as an error. */
13666 remote_target::set_disconnected_tracing (int val
)
13668 struct remote_state
*rs
= get_remote_state ();
13670 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13674 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13675 "QTDisconnected:%x", val
);
13677 reply
= remote_get_noisy_reply ();
13678 if (*reply
== '\0')
13679 error (_("Target does not support this command."));
13680 if (strcmp (reply
, "OK") != 0)
13681 error (_("Bogus reply from target: %s"), reply
);
13684 warning (_("Target does not support disconnected tracing."));
13688 remote_target::core_of_thread (ptid_t ptid
)
13690 thread_info
*info
= find_thread_ptid (this, ptid
);
13692 if (info
!= NULL
&& info
->priv
!= NULL
)
13693 return get_remote_thread_info (info
)->core
;
13699 remote_target::set_circular_trace_buffer (int val
)
13701 struct remote_state
*rs
= get_remote_state ();
13704 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13705 "QTBuffer:circular:%x", val
);
13707 reply
= remote_get_noisy_reply ();
13708 if (*reply
== '\0')
13709 error (_("Target does not support this command."));
13710 if (strcmp (reply
, "OK") != 0)
13711 error (_("Bogus reply from target: %s"), reply
);
13715 remote_target::traceframe_info ()
13717 gdb::optional
<gdb::char_vector
> text
13718 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO
,
13721 return parse_traceframe_info (text
->data ());
13726 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13727 instruction on which a fast tracepoint may be placed. Returns -1
13728 if the packet is not supported, and 0 if the minimum instruction
13729 length is unknown. */
13732 remote_target::get_min_fast_tracepoint_insn_len ()
13734 struct remote_state
*rs
= get_remote_state ();
13737 /* If we're not debugging a process yet, the IPA can't be
13739 if (!target_has_execution ())
13742 /* Make sure the remote is pointing at the right process. */
13743 set_general_process ();
13745 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13747 reply
= remote_get_noisy_reply ();
13748 if (*reply
== '\0')
13752 ULONGEST min_insn_len
;
13754 unpack_varlen_hex (reply
, &min_insn_len
);
13756 return (int) min_insn_len
;
13761 remote_target::set_trace_buffer_size (LONGEST val
)
13763 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13765 struct remote_state
*rs
= get_remote_state ();
13766 char *buf
= rs
->buf
.data ();
13767 char *endbuf
= buf
+ get_remote_packet_size ();
13768 enum packet_result result
;
13770 gdb_assert (val
>= 0 || val
== -1);
13771 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13772 /* Send -1 as literal "-1" to avoid host size dependency. */
13776 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13779 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13782 remote_get_noisy_reply ();
13783 result
= packet_ok (rs
->buf
,
13784 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13786 if (result
!= PACKET_OK
)
13787 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13792 remote_target::set_trace_notes (const char *user
, const char *notes
,
13793 const char *stop_notes
)
13795 struct remote_state
*rs
= get_remote_state ();
13797 char *buf
= rs
->buf
.data ();
13798 char *endbuf
= buf
+ get_remote_packet_size ();
13801 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13804 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13805 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13811 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13812 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13818 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13819 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13823 /* Ensure the buffer is terminated. */
13827 reply
= remote_get_noisy_reply ();
13828 if (*reply
== '\0')
13831 if (strcmp (reply
, "OK") != 0)
13832 error (_("Bogus reply from target: %s"), reply
);
13838 remote_target::use_agent (bool use
)
13840 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13842 struct remote_state
*rs
= get_remote_state ();
13844 /* If the stub supports QAgent. */
13845 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13847 getpkt (&rs
->buf
, 0);
13849 if (strcmp (rs
->buf
.data (), "OK") == 0)
13860 remote_target::can_use_agent ()
13862 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13865 struct btrace_target_info
13867 /* The ptid of the traced thread. */
13870 /* The obtained branch trace configuration. */
13871 struct btrace_config conf
;
13874 /* Reset our idea of our target's btrace configuration. */
13877 remote_btrace_reset (remote_state
*rs
)
13879 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13882 /* Synchronize the configuration with the target. */
13885 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13887 struct packet_config
*packet
;
13888 struct remote_state
*rs
;
13889 char *buf
, *pos
, *endbuf
;
13891 rs
= get_remote_state ();
13892 buf
= rs
->buf
.data ();
13893 endbuf
= buf
+ get_remote_packet_size ();
13895 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13896 if (packet_config_support (packet
) == PACKET_ENABLE
13897 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13900 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13904 getpkt (&rs
->buf
, 0);
13906 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13908 if (buf
[0] == 'E' && buf
[1] == '.')
13909 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13911 error (_("Failed to configure the BTS buffer size."));
13914 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13917 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13918 if (packet_config_support (packet
) == PACKET_ENABLE
13919 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13922 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13926 getpkt (&rs
->buf
, 0);
13928 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13930 if (buf
[0] == 'E' && buf
[1] == '.')
13931 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13933 error (_("Failed to configure the trace buffer size."));
13936 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13940 /* Read the current thread's btrace configuration from the target and
13941 store it into CONF. */
13944 btrace_read_config (struct btrace_config
*conf
)
13946 gdb::optional
<gdb::char_vector
> xml
13947 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF
, "");
13949 parse_xml_btrace_conf (conf
, xml
->data ());
13952 /* Maybe reopen target btrace. */
13955 remote_target::remote_btrace_maybe_reopen ()
13957 struct remote_state
*rs
= get_remote_state ();
13958 int btrace_target_pushed
= 0;
13959 #if !defined (HAVE_LIBIPT)
13963 /* Don't bother walking the entirety of the remote thread list when
13964 we know the feature isn't supported by the remote. */
13965 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
13968 scoped_restore_current_thread restore_thread
;
13970 for (thread_info
*tp
: all_non_exited_threads (this))
13972 set_general_thread (tp
->ptid
);
13974 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13975 btrace_read_config (&rs
->btrace_config
);
13977 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13980 #if !defined (HAVE_LIBIPT)
13981 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13986 warning (_("Target is recording using Intel Processor Trace "
13987 "but support was disabled at compile time."));
13992 #endif /* !defined (HAVE_LIBIPT) */
13994 /* Push target, once, but before anything else happens. This way our
13995 changes to the threads will be cleaned up by unpushing the target
13996 in case btrace_read_config () throws. */
13997 if (!btrace_target_pushed
)
13999 btrace_target_pushed
= 1;
14000 record_btrace_push_target ();
14001 printf_filtered (_("Target is recording using %s.\n"),
14002 btrace_format_string (rs
->btrace_config
.format
));
14005 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
14006 tp
->btrace
.target
->ptid
= tp
->ptid
;
14007 tp
->btrace
.target
->conf
= rs
->btrace_config
;
14011 /* Enable branch tracing. */
14013 struct btrace_target_info
*
14014 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
14016 struct btrace_target_info
*tinfo
= NULL
;
14017 struct packet_config
*packet
= NULL
;
14018 struct remote_state
*rs
= get_remote_state ();
14019 char *buf
= rs
->buf
.data ();
14020 char *endbuf
= buf
+ get_remote_packet_size ();
14022 switch (conf
->format
)
14024 case BTRACE_FORMAT_BTS
:
14025 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
14028 case BTRACE_FORMAT_PT
:
14029 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
14033 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
14034 error (_("Target does not support branch tracing."));
14036 btrace_sync_conf (conf
);
14038 set_general_thread (ptid
);
14040 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14042 getpkt (&rs
->buf
, 0);
14044 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14046 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14047 error (_("Could not enable branch tracing for %s: %s"),
14048 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
14050 error (_("Could not enable branch tracing for %s."),
14051 target_pid_to_str (ptid
).c_str ());
14054 tinfo
= XCNEW (struct btrace_target_info
);
14055 tinfo
->ptid
= ptid
;
14057 /* If we fail to read the configuration, we lose some information, but the
14058 tracing itself is not impacted. */
14061 btrace_read_config (&tinfo
->conf
);
14063 catch (const gdb_exception_error
&err
)
14065 if (err
.message
!= NULL
)
14066 warning ("%s", err
.what ());
14072 /* Disable branch tracing. */
14075 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
14077 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
14078 struct remote_state
*rs
= get_remote_state ();
14079 char *buf
= rs
->buf
.data ();
14080 char *endbuf
= buf
+ get_remote_packet_size ();
14082 if (packet_config_support (packet
) != PACKET_ENABLE
)
14083 error (_("Target does not support branch tracing."));
14085 set_general_thread (tinfo
->ptid
);
14087 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14089 getpkt (&rs
->buf
, 0);
14091 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14093 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14094 error (_("Could not disable branch tracing for %s: %s"),
14095 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
14097 error (_("Could not disable branch tracing for %s."),
14098 target_pid_to_str (tinfo
->ptid
).c_str ());
14104 /* Teardown branch tracing. */
14107 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
14109 /* We must not talk to the target during teardown. */
14113 /* Read the branch trace. */
14116 remote_target::read_btrace (struct btrace_data
*btrace
,
14117 struct btrace_target_info
*tinfo
,
14118 enum btrace_read_type type
)
14120 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
14123 if (packet_config_support (packet
) != PACKET_ENABLE
)
14124 error (_("Target does not support branch tracing."));
14126 #if !defined(HAVE_LIBEXPAT)
14127 error (_("Cannot process branch tracing result. XML parsing not supported."));
14132 case BTRACE_READ_ALL
:
14135 case BTRACE_READ_NEW
:
14138 case BTRACE_READ_DELTA
:
14142 internal_error (__FILE__
, __LINE__
,
14143 _("Bad branch tracing read type: %u."),
14144 (unsigned int) type
);
14147 gdb::optional
<gdb::char_vector
> xml
14148 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE
, annex
);
14150 return BTRACE_ERR_UNKNOWN
;
14152 parse_xml_btrace (btrace
, xml
->data ());
14154 return BTRACE_ERR_NONE
;
14157 const struct btrace_config
*
14158 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
14160 return &tinfo
->conf
;
14164 remote_target::augmented_libraries_svr4_read ()
14166 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
14170 /* Implementation of to_load. */
14173 remote_target::load (const char *name
, int from_tty
)
14175 generic_load (name
, from_tty
);
14178 /* Accepts an integer PID; returns a string representing a file that
14179 can be opened on the remote side to get the symbols for the child
14180 process. Returns NULL if the operation is not supported. */
14183 remote_target::pid_to_exec_file (int pid
)
14185 static gdb::optional
<gdb::char_vector
> filename
;
14186 char *annex
= NULL
;
14188 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
14191 inferior
*inf
= find_inferior_pid (this, pid
);
14193 internal_error (__FILE__
, __LINE__
,
14194 _("not currently attached to process %d"), pid
);
14196 if (!inf
->fake_pid_p
)
14198 const int annex_size
= 9;
14200 annex
= (char *) alloca (annex_size
);
14201 xsnprintf (annex
, annex_size
, "%x", pid
);
14204 filename
= target_read_stralloc (current_top_target (),
14205 TARGET_OBJECT_EXEC_FILE
, annex
);
14207 return filename
? filename
->data () : nullptr;
14210 /* Implement the to_can_do_single_step target_ops method. */
14213 remote_target::can_do_single_step ()
14215 /* We can only tell whether target supports single step or not by
14216 supported s and S vCont actions if the stub supports vContSupported
14217 feature. If the stub doesn't support vContSupported feature,
14218 we have conservatively to think target doesn't supports single
14220 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
14222 struct remote_state
*rs
= get_remote_state ();
14224 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14225 remote_vcont_probe ();
14227 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14233 /* Implementation of the to_execution_direction method for the remote
14236 enum exec_direction_kind
14237 remote_target::execution_direction ()
14239 struct remote_state
*rs
= get_remote_state ();
14241 return rs
->last_resume_exec_dir
;
14244 /* Return pointer to the thread_info struct which corresponds to
14245 THREAD_HANDLE (having length HANDLE_LEN). */
14248 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14252 for (thread_info
*tp
: all_non_exited_threads (this))
14254 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14256 if (tp
->inf
== inf
&& priv
!= NULL
)
14258 if (handle_len
!= priv
->thread_handle
.size ())
14259 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14260 handle_len
, priv
->thread_handle
.size ());
14261 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14271 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14273 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14274 return priv
->thread_handle
;
14278 remote_target::can_async_p ()
14280 struct remote_state
*rs
= get_remote_state ();
14282 /* We don't go async if the user has explicitly prevented it with the
14283 "maint set target-async" command. */
14284 if (!target_async_permitted
)
14287 /* We're async whenever the serial device is. */
14288 return serial_can_async_p (rs
->remote_desc
);
14292 remote_target::is_async_p ()
14294 struct remote_state
*rs
= get_remote_state ();
14296 if (!target_async_permitted
)
14297 /* We only enable async when the user specifically asks for it. */
14300 /* We're async whenever the serial device is. */
14301 return serial_is_async_p (rs
->remote_desc
);
14304 /* Pass the SERIAL event on and up to the client. One day this code
14305 will be able to delay notifying the client of an event until the
14306 point where an entire packet has been received. */
14308 static serial_event_ftype remote_async_serial_handler
;
14311 remote_async_serial_handler (struct serial
*scb
, void *context
)
14313 /* Don't propogate error information up to the client. Instead let
14314 the client find out about the error by querying the target. */
14315 inferior_event_handler (INF_REG_EVENT
);
14319 remote_async_inferior_event_handler (gdb_client_data data
)
14321 inferior_event_handler (INF_REG_EVENT
);
14323 remote_target
*remote
= (remote_target
*) data
;
14324 remote_state
*rs
= remote
->get_remote_state ();
14326 /* inferior_event_handler may have consumed an event pending on the
14327 infrun side without calling target_wait on the REMOTE target, or
14328 may have pulled an event out of a different target. Keep trying
14329 for this remote target as long it still has either pending events
14330 or unacknowledged notifications. */
14332 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
14333 || !rs
->stop_reply_queue
.empty ())
14334 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14338 remote_target::async_wait_fd ()
14340 struct remote_state
*rs
= get_remote_state ();
14341 return rs
->remote_desc
->fd
;
14345 remote_target::async (int enable
)
14347 struct remote_state
*rs
= get_remote_state ();
14351 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14353 /* If there are pending events in the stop reply queue tell the
14354 event loop to process them. */
14355 if (!rs
->stop_reply_queue
.empty ())
14356 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14357 /* For simplicity, below we clear the pending events token
14358 without remembering whether it is marked, so here we always
14359 mark it. If there's actually no pending notification to
14360 process, this ends up being a no-op (other than a spurious
14361 event-loop wakeup). */
14362 if (target_is_non_stop_p ())
14363 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14367 serial_async (rs
->remote_desc
, NULL
, NULL
);
14368 /* If the core is disabling async, it doesn't want to be
14369 disturbed with target events. Clear all async event sources
14371 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14372 if (target_is_non_stop_p ())
14373 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14377 /* Implementation of the to_thread_events method. */
14380 remote_target::thread_events (int enable
)
14382 struct remote_state
*rs
= get_remote_state ();
14383 size_t size
= get_remote_packet_size ();
14385 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14388 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14390 getpkt (&rs
->buf
, 0);
14392 switch (packet_ok (rs
->buf
,
14393 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14396 if (strcmp (rs
->buf
.data (), "OK") != 0)
14397 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14400 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14402 case PACKET_UNKNOWN
:
14408 show_remote_cmd (const char *args
, int from_tty
)
14410 /* We can't just use cmd_show_list here, because we want to skip
14411 the redundant "show remote Z-packet" and the legacy aliases. */
14412 struct cmd_list_element
*list
= remote_show_cmdlist
;
14413 struct ui_out
*uiout
= current_uiout
;
14415 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14416 for (; list
!= NULL
; list
= list
->next
)
14417 if (strcmp (list
->name
, "Z-packet") == 0)
14419 else if (list
->type
== not_set_cmd
)
14420 /* Alias commands are exactly like the original, except they
14421 don't have the normal type. */
14425 ui_out_emit_tuple
option_emitter (uiout
, "option");
14427 uiout
->field_string ("name", list
->name
);
14428 uiout
->text (": ");
14429 if (list
->type
== show_cmd
)
14430 do_show_command (NULL
, from_tty
, list
);
14432 cmd_func (list
, NULL
, from_tty
);
14437 /* Function to be called whenever a new objfile (shlib) is detected. */
14439 remote_new_objfile (struct objfile
*objfile
)
14441 remote_target
*remote
= get_current_remote_target ();
14443 if (remote
!= NULL
) /* Have a remote connection. */
14444 remote
->remote_check_symbols ();
14447 /* Pull all the tracepoints defined on the target and create local
14448 data structures representing them. We don't want to create real
14449 tracepoints yet, we don't want to mess up the user's existing
14453 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14455 struct remote_state
*rs
= get_remote_state ();
14458 /* Ask for a first packet of tracepoint definition. */
14460 getpkt (&rs
->buf
, 0);
14461 p
= rs
->buf
.data ();
14462 while (*p
&& *p
!= 'l')
14464 parse_tracepoint_definition (p
, utpp
);
14465 /* Ask for another packet of tracepoint definition. */
14467 getpkt (&rs
->buf
, 0);
14468 p
= rs
->buf
.data ();
14474 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14476 struct remote_state
*rs
= get_remote_state ();
14479 /* Ask for a first packet of variable definition. */
14481 getpkt (&rs
->buf
, 0);
14482 p
= rs
->buf
.data ();
14483 while (*p
&& *p
!= 'l')
14485 parse_tsv_definition (p
, utsvp
);
14486 /* Ask for another packet of variable definition. */
14488 getpkt (&rs
->buf
, 0);
14489 p
= rs
->buf
.data ();
14494 /* The "set/show range-stepping" show hook. */
14497 show_range_stepping (struct ui_file
*file
, int from_tty
,
14498 struct cmd_list_element
*c
,
14501 fprintf_filtered (file
,
14502 _("Debugger's willingness to use range stepping "
14503 "is %s.\n"), value
);
14506 /* Return true if the vCont;r action is supported by the remote
14510 remote_target::vcont_r_supported ()
14512 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14513 remote_vcont_probe ();
14515 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14516 && get_remote_state ()->supports_vCont
.r
);
14519 /* The "set/show range-stepping" set hook. */
14522 set_range_stepping (const char *ignore_args
, int from_tty
,
14523 struct cmd_list_element
*c
)
14525 /* When enabling, check whether range stepping is actually supported
14526 by the target, and warn if not. */
14527 if (use_range_stepping
)
14529 remote_target
*remote
= get_current_remote_target ();
14531 || !remote
->vcont_r_supported ())
14532 warning (_("Range stepping is not supported by the current target"));
14536 void _initialize_remote ();
14538 _initialize_remote ()
14540 struct cmd_list_element
*cmd
;
14541 const char *cmd_name
;
14543 /* architecture specific data */
14544 remote_g_packet_data_handle
=
14545 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14547 add_target (remote_target_info
, remote_target::open
);
14548 add_target (extended_remote_target_info
, extended_remote_target::open
);
14550 /* Hook into new objfile notification. */
14551 gdb::observers::new_objfile
.attach (remote_new_objfile
);
14554 init_remote_threadtests ();
14557 /* set/show remote ... */
14559 add_basic_prefix_cmd ("remote", class_maintenance
, _("\
14560 Remote protocol specific variables.\n\
14561 Configure various remote-protocol specific variables such as\n\
14562 the packets being used."),
14563 &remote_set_cmdlist
, "set remote ",
14564 0 /* allow-unknown */, &setlist
);
14565 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14566 Remote protocol specific variables.\n\
14567 Configure various remote-protocol specific variables such as\n\
14568 the packets being used."),
14569 &remote_show_cmdlist
, "show remote ",
14570 0 /* allow-unknown */, &showlist
);
14572 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14573 Compare section data on target to the exec file.\n\
14574 Argument is a single section name (default: all loaded sections).\n\
14575 To compare only read-only loaded sections, specify the -r option."),
14578 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14579 Send an arbitrary packet to a remote target.\n\
14580 maintenance packet TEXT\n\
14581 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14582 this command sends the string TEXT to the inferior, and displays the\n\
14583 response packet. GDB supplies the initial `$' character, and the\n\
14584 terminating `#' character and checksum."),
14587 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14588 Set whether to send break if interrupted."), _("\
14589 Show whether to send break if interrupted."), _("\
14590 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14591 set_remotebreak
, show_remotebreak
,
14592 &setlist
, &showlist
);
14593 cmd_name
= "remotebreak";
14594 cmd
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
14595 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14596 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14597 cmd
= lookup_cmd (&cmd_name
, showlist
, "", NULL
, -1, 1);
14598 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14600 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14601 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14603 Set interrupt sequence to remote target."), _("\
14604 Show interrupt sequence to remote target."), _("\
14605 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14606 NULL
, show_interrupt_sequence
,
14607 &remote_set_cmdlist
,
14608 &remote_show_cmdlist
);
14610 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14611 &interrupt_on_connect
, _("\
14612 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14613 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14614 If set, interrupt sequence is sent to remote target."),
14616 &remote_set_cmdlist
, &remote_show_cmdlist
);
14618 /* Install commands for configuring memory read/write packets. */
14620 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14621 Set the maximum number of bytes per memory write packet (deprecated)."),
14623 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14624 Show the maximum number of bytes per memory write packet (deprecated)."),
14626 add_cmd ("memory-write-packet-size", no_class
,
14627 set_memory_write_packet_size
, _("\
14628 Set the maximum number of bytes per memory-write packet.\n\
14629 Specify the number of bytes in a packet or 0 (zero) for the\n\
14630 default packet size. The actual limit is further reduced\n\
14631 dependent on the target. Specify ``fixed'' to disable the\n\
14632 further restriction and ``limit'' to enable that restriction."),
14633 &remote_set_cmdlist
);
14634 add_cmd ("memory-read-packet-size", no_class
,
14635 set_memory_read_packet_size
, _("\
14636 Set the maximum number of bytes per memory-read packet.\n\
14637 Specify the number of bytes in a packet or 0 (zero) for the\n\
14638 default packet size. The actual limit is further reduced\n\
14639 dependent on the target. Specify ``fixed'' to disable the\n\
14640 further restriction and ``limit'' to enable that restriction."),
14641 &remote_set_cmdlist
);
14642 add_cmd ("memory-write-packet-size", no_class
,
14643 show_memory_write_packet_size
,
14644 _("Show the maximum number of bytes per memory-write packet."),
14645 &remote_show_cmdlist
);
14646 add_cmd ("memory-read-packet-size", no_class
,
14647 show_memory_read_packet_size
,
14648 _("Show the maximum number of bytes per memory-read packet."),
14649 &remote_show_cmdlist
);
14651 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14652 &remote_hw_watchpoint_limit
, _("\
14653 Set the maximum number of target hardware watchpoints."), _("\
14654 Show the maximum number of target hardware watchpoints."), _("\
14655 Specify \"unlimited\" for unlimited hardware watchpoints."),
14656 NULL
, show_hardware_watchpoint_limit
,
14657 &remote_set_cmdlist
,
14658 &remote_show_cmdlist
);
14659 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14661 &remote_hw_watchpoint_length_limit
, _("\
14662 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14663 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14664 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14665 NULL
, show_hardware_watchpoint_length_limit
,
14666 &remote_set_cmdlist
, &remote_show_cmdlist
);
14667 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14668 &remote_hw_breakpoint_limit
, _("\
14669 Set the maximum number of target hardware breakpoints."), _("\
14670 Show the maximum number of target hardware breakpoints."), _("\
14671 Specify \"unlimited\" for unlimited hardware breakpoints."),
14672 NULL
, show_hardware_breakpoint_limit
,
14673 &remote_set_cmdlist
, &remote_show_cmdlist
);
14675 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14676 &remote_address_size
, _("\
14677 Set the maximum size of the address (in bits) in a memory packet."), _("\
14678 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14680 NULL
, /* FIXME: i18n: */
14681 &setlist
, &showlist
);
14683 init_all_packet_configs ();
14685 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14686 "X", "binary-download", 1);
14688 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14689 "vCont", "verbose-resume", 0);
14691 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14692 "QPassSignals", "pass-signals", 0);
14694 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14695 "QCatchSyscalls", "catch-syscalls", 0);
14697 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14698 "QProgramSignals", "program-signals", 0);
14700 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14701 "QSetWorkingDir", "set-working-dir", 0);
14703 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14704 "QStartupWithShell", "startup-with-shell", 0);
14706 add_packet_config_cmd (&remote_protocol_packets
14707 [PACKET_QEnvironmentHexEncoded
],
14708 "QEnvironmentHexEncoded", "environment-hex-encoded",
14711 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14712 "QEnvironmentReset", "environment-reset",
14715 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14716 "QEnvironmentUnset", "environment-unset",
14719 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14720 "qSymbol", "symbol-lookup", 0);
14722 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14723 "P", "set-register", 1);
14725 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14726 "p", "fetch-register", 1);
14728 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14729 "Z0", "software-breakpoint", 0);
14731 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14732 "Z1", "hardware-breakpoint", 0);
14734 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14735 "Z2", "write-watchpoint", 0);
14737 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14738 "Z3", "read-watchpoint", 0);
14740 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14741 "Z4", "access-watchpoint", 0);
14743 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14744 "qXfer:auxv:read", "read-aux-vector", 0);
14746 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14747 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14749 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14750 "qXfer:features:read", "target-features", 0);
14752 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14753 "qXfer:libraries:read", "library-info", 0);
14755 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14756 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14758 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14759 "qXfer:memory-map:read", "memory-map", 0);
14761 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14762 "qXfer:osdata:read", "osdata", 0);
14764 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14765 "qXfer:threads:read", "threads", 0);
14767 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14768 "qXfer:siginfo:read", "read-siginfo-object", 0);
14770 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14771 "qXfer:siginfo:write", "write-siginfo-object", 0);
14773 add_packet_config_cmd
14774 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14775 "qXfer:traceframe-info:read", "traceframe-info", 0);
14777 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14778 "qXfer:uib:read", "unwind-info-block", 0);
14780 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14781 "qGetTLSAddr", "get-thread-local-storage-address",
14784 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14785 "qGetTIBAddr", "get-thread-information-block-address",
14788 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14789 "bc", "reverse-continue", 0);
14791 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14792 "bs", "reverse-step", 0);
14794 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14795 "qSupported", "supported-packets", 0);
14797 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14798 "qSearch:memory", "search-memory", 0);
14800 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14801 "qTStatus", "trace-status", 0);
14803 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14804 "vFile:setfs", "hostio-setfs", 0);
14806 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14807 "vFile:open", "hostio-open", 0);
14809 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14810 "vFile:pread", "hostio-pread", 0);
14812 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14813 "vFile:pwrite", "hostio-pwrite", 0);
14815 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14816 "vFile:close", "hostio-close", 0);
14818 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14819 "vFile:unlink", "hostio-unlink", 0);
14821 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14822 "vFile:readlink", "hostio-readlink", 0);
14824 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14825 "vFile:fstat", "hostio-fstat", 0);
14827 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14828 "vAttach", "attach", 0);
14830 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14833 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14834 "QStartNoAckMode", "noack", 0);
14836 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14837 "vKill", "kill", 0);
14839 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14840 "qAttached", "query-attached", 0);
14842 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14843 "ConditionalTracepoints",
14844 "conditional-tracepoints", 0);
14846 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14847 "ConditionalBreakpoints",
14848 "conditional-breakpoints", 0);
14850 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14851 "BreakpointCommands",
14852 "breakpoint-commands", 0);
14854 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14855 "FastTracepoints", "fast-tracepoints", 0);
14857 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14858 "TracepointSource", "TracepointSource", 0);
14860 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14861 "QAllow", "allow", 0);
14863 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14864 "StaticTracepoints", "static-tracepoints", 0);
14866 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14867 "InstallInTrace", "install-in-trace", 0);
14869 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14870 "qXfer:statictrace:read", "read-sdata-object", 0);
14872 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14873 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14875 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14876 "QDisableRandomization", "disable-randomization", 0);
14878 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14879 "QAgent", "agent", 0);
14881 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14882 "QTBuffer:size", "trace-buffer-size", 0);
14884 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14885 "Qbtrace:off", "disable-btrace", 0);
14887 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14888 "Qbtrace:bts", "enable-btrace-bts", 0);
14890 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14891 "Qbtrace:pt", "enable-btrace-pt", 0);
14893 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14894 "qXfer:btrace", "read-btrace", 0);
14896 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14897 "qXfer:btrace-conf", "read-btrace-conf", 0);
14899 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14900 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14902 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14903 "multiprocess-feature", "multiprocess-feature", 0);
14905 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14906 "swbreak-feature", "swbreak-feature", 0);
14908 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14909 "hwbreak-feature", "hwbreak-feature", 0);
14911 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14912 "fork-event-feature", "fork-event-feature", 0);
14914 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14915 "vfork-event-feature", "vfork-event-feature", 0);
14917 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14918 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14920 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14921 "vContSupported", "verbose-resume-supported", 0);
14923 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14924 "exec-event-feature", "exec-event-feature", 0);
14926 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14927 "vCtrlC", "ctrl-c", 0);
14929 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14930 "QThreadEvents", "thread-events", 0);
14932 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14933 "N stop reply", "no-resumed-stop-reply", 0);
14935 /* Assert that we've registered "set remote foo-packet" commands
14936 for all packet configs. */
14940 for (i
= 0; i
< PACKET_MAX
; i
++)
14942 /* Ideally all configs would have a command associated. Some
14943 still don't though. */
14948 case PACKET_QNonStop
:
14949 case PACKET_EnableDisableTracepoints_feature
:
14950 case PACKET_tracenz_feature
:
14951 case PACKET_DisconnectedTracing_feature
:
14952 case PACKET_augmented_libraries_svr4_read_feature
:
14954 /* Additions to this list need to be well justified:
14955 pre-existing packets are OK; new packets are not. */
14963 /* This catches both forgetting to add a config command, and
14964 forgetting to remove a packet from the exception list. */
14965 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14969 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14970 Z sub-packet has its own set and show commands, but users may
14971 have sets to this variable in their .gdbinit files (or in their
14973 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14974 &remote_Z_packet_detect
, _("\
14975 Set use of remote protocol `Z' packets."), _("\
14976 Show use of remote protocol `Z' packets."), _("\
14977 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14979 set_remote_protocol_Z_packet_cmd
,
14980 show_remote_protocol_Z_packet_cmd
,
14981 /* FIXME: i18n: Use of remote protocol
14982 `Z' packets is %s. */
14983 &remote_set_cmdlist
, &remote_show_cmdlist
);
14985 add_basic_prefix_cmd ("remote", class_files
, _("\
14986 Manipulate files on the remote system.\n\
14987 Transfer files to and from the remote target system."),
14988 &remote_cmdlist
, "remote ",
14989 0 /* allow-unknown */, &cmdlist
);
14991 add_cmd ("put", class_files
, remote_put_command
,
14992 _("Copy a local file to the remote system."),
14995 add_cmd ("get", class_files
, remote_get_command
,
14996 _("Copy a remote file to the local system."),
14999 add_cmd ("delete", class_files
, remote_delete_command
,
15000 _("Delete a remote file."),
15003 add_setshow_string_noescape_cmd ("exec-file", class_files
,
15004 &remote_exec_file_var
, _("\
15005 Set the remote pathname for \"run\"."), _("\
15006 Show the remote pathname for \"run\"."), NULL
,
15007 set_remote_exec_file
,
15008 show_remote_exec_file
,
15009 &remote_set_cmdlist
,
15010 &remote_show_cmdlist
);
15012 add_setshow_boolean_cmd ("range-stepping", class_run
,
15013 &use_range_stepping
, _("\
15014 Enable or disable range stepping."), _("\
15015 Show whether target-assisted range stepping is enabled."), _("\
15016 If on, and the target supports it, when stepping a source line, GDB\n\
15017 tells the target to step the corresponding range of addresses itself instead\n\
15018 of issuing multiple single-steps. This speeds up source level\n\
15019 stepping. If off, GDB always issues single-steps, even if range\n\
15020 stepping is supported by the target. The default is on."),
15021 set_range_stepping
,
15022 show_range_stepping
,
15026 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
15027 Set watchdog timer."), _("\
15028 Show watchdog timer."), _("\
15029 When non-zero, this timeout is used instead of waiting forever for a target\n\
15030 to finish a low-level step or continue operation. If the specified amount\n\
15031 of time passes without a response from the target, an error occurs."),
15034 &setlist
, &showlist
);
15036 add_setshow_zuinteger_unlimited_cmd ("remote-packet-max-chars", no_class
,
15037 &remote_packet_max_chars
, _("\
15038 Set the maximum number of characters to display for each remote packet."), _("\
15039 Show the maximum number of characters to display for each remote packet."), _("\
15040 Specify \"unlimited\" to display all the characters."),
15041 NULL
, show_remote_packet_max_chars
,
15042 &setdebuglist
, &showdebuglist
);
15044 /* Eventually initialize fileio. See fileio.c */
15045 initialize_remote_fileio (&remote_set_cmdlist
, &remote_show_cmdlist
);