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"
82 #include "gdbsupport/selftest.h"
84 /* The remote target. */
86 static const char remote_doc
[] = N_("\
87 Use a remote computer via a serial line, using a gdb-specific protocol.\n\
88 Specify the serial device it is connected to\n\
89 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
93 bool remote_debug
= false;
95 #define OPAQUETHREADBYTES 8
97 /* a 64 bit opaque identifier */
98 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
100 struct gdb_ext_thread_info
;
101 struct threads_listing_context
;
102 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
103 struct protocol_feature
;
107 typedef std::unique_ptr
<stop_reply
> stop_reply_up
;
109 /* Generic configuration support for packets the stub optionally
110 supports. Allows the user to specify the use of the packet as well
111 as allowing GDB to auto-detect support in the remote stub. */
115 PACKET_SUPPORT_UNKNOWN
= 0,
120 /* Analyze a packet's return value and update the packet config
130 struct threads_listing_context
;
132 /* Stub vCont actions support.
134 Each field is a boolean flag indicating whether the stub reports
135 support for the corresponding action. */
137 struct vCont_action_support
152 /* About this many threadids fit in a packet. */
154 #define MAXTHREADLISTRESULTS 32
156 /* Data for the vFile:pread readahead cache. */
158 struct readahead_cache
160 /* Invalidate the readahead cache. */
163 /* Invalidate the readahead cache if it is holding data for FD. */
164 void invalidate_fd (int fd
);
166 /* Serve pread from the readahead cache. Returns number of bytes
167 read, or 0 if the request can't be served from the cache. */
168 int pread (int fd
, gdb_byte
*read_buf
, size_t len
, ULONGEST offset
);
170 /* The file descriptor for the file that is being cached. -1 if the
174 /* The offset into the file that the cache buffer corresponds
178 /* The buffer holding the cache contents. */
179 gdb_byte
*buf
= nullptr;
180 /* The buffer's size. We try to read as much as fits into a packet
184 /* Cache hit and miss counters. */
185 ULONGEST hit_count
= 0;
186 ULONGEST miss_count
= 0;
189 /* Description of the remote protocol for a given architecture. */
193 long offset
; /* Offset into G packet. */
194 long regnum
; /* GDB's internal register number. */
195 LONGEST pnum
; /* Remote protocol register number. */
196 int in_g_packet
; /* Always part of G packet. */
197 /* long size in bytes; == register_size (target_gdbarch (), regnum);
199 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
203 struct remote_arch_state
205 explicit remote_arch_state (struct gdbarch
*gdbarch
);
207 /* Description of the remote protocol registers. */
208 long sizeof_g_packet
;
210 /* Description of the remote protocol registers indexed by REGNUM
211 (making an array gdbarch_num_regs in size). */
212 std::unique_ptr
<packet_reg
[]> regs
;
214 /* This is the size (in chars) of the first response to the ``g''
215 packet. It is used as a heuristic when determining the maximum
216 size of memory-read and memory-write packets. A target will
217 typically only reserve a buffer large enough to hold the ``g''
218 packet. The size does not include packet overhead (headers and
220 long actual_register_packet_size
;
222 /* This is the maximum size (in chars) of a non read/write packet.
223 It is also used as a cap on the size of read/write packets. */
224 long remote_packet_size
;
227 /* Description of the remote protocol state for the currently
228 connected target. This is per-target state, and independent of the
229 selected architecture. */
238 /* Get the remote arch state for GDBARCH. */
239 struct remote_arch_state
*get_remote_arch_state (struct gdbarch
*gdbarch
);
243 /* A buffer to use for incoming packets, and its current size. The
244 buffer is grown dynamically for larger incoming packets.
245 Outgoing packets may also be constructed in this buffer.
246 The size of the buffer is always at least REMOTE_PACKET_SIZE;
247 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
249 gdb::char_vector buf
;
251 /* True if we're going through initial connection setup (finding out
252 about the remote side's threads, relocating symbols, etc.). */
253 bool starting_up
= false;
255 /* If we negotiated packet size explicitly (and thus can bypass
256 heuristics for the largest packet size that will not overflow
257 a buffer in the stub), this will be set to that packet size.
258 Otherwise zero, meaning to use the guessed size. */
259 long explicit_packet_size
= 0;
261 /* remote_wait is normally called when the target is running and
262 waits for a stop reply packet. But sometimes we need to call it
263 when the target is already stopped. We can send a "?" packet
264 and have remote_wait read the response. Or, if we already have
265 the response, we can stash it in BUF and tell remote_wait to
266 skip calling getpkt. This flag is set when BUF contains a
267 stop reply packet and the target is not waiting. */
268 int cached_wait_status
= 0;
270 /* True, if in no ack mode. That is, neither GDB nor the stub will
271 expect acks from each other. The connection is assumed to be
273 bool noack_mode
= false;
275 /* True if we're connected in extended remote mode. */
276 bool extended
= false;
278 /* True if we resumed the target and we're waiting for the target to
279 stop. In the mean time, we can't start another command/query.
280 The remote server wouldn't be ready to process it, so we'd
281 timeout waiting for a reply that would never come and eventually
282 we'd close the connection. This can happen in asynchronous mode
283 because we allow GDB commands while the target is running. */
284 bool waiting_for_stop_reply
= false;
286 /* The status of the stub support for the various vCont actions. */
287 vCont_action_support supports_vCont
;
288 /* Whether vCont support was probed already. This is a workaround
289 until packet_support is per-connection. */
290 bool supports_vCont_probed
;
292 /* True if the user has pressed Ctrl-C, but the target hasn't
293 responded to that. */
294 bool ctrlc_pending_p
= false;
296 /* True if we saw a Ctrl-C while reading or writing from/to the
297 remote descriptor. At that point it is not safe to send a remote
298 interrupt packet, so we instead remember we saw the Ctrl-C and
299 process it once we're done with sending/receiving the current
300 packet, which should be shortly. If however that takes too long,
301 and the user presses Ctrl-C again, we offer to disconnect. */
302 bool got_ctrlc_during_io
= false;
304 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
305 remote_open knows that we don't have a file open when the program
307 struct serial
*remote_desc
= nullptr;
309 /* These are the threads which we last sent to the remote system. The
310 TID member will be -1 for all or -2 for not sent yet. */
311 ptid_t general_thread
= null_ptid
;
312 ptid_t continue_thread
= null_ptid
;
314 /* This is the traceframe which we last selected on the remote system.
315 It will be -1 if no traceframe is selected. */
316 int remote_traceframe_number
= -1;
318 char *last_pass_packet
= nullptr;
320 /* The last QProgramSignals packet sent to the target. We bypass
321 sending a new program signals list down to the target if the new
322 packet is exactly the same as the last we sent. IOW, we only let
323 the target know about program signals list changes. */
324 char *last_program_signals_packet
= nullptr;
326 gdb_signal last_sent_signal
= GDB_SIGNAL_0
;
328 bool last_sent_step
= false;
330 /* The execution direction of the last resume we got. */
331 exec_direction_kind last_resume_exec_dir
= EXEC_FORWARD
;
333 char *finished_object
= nullptr;
334 char *finished_annex
= nullptr;
335 ULONGEST finished_offset
= 0;
337 /* Should we try the 'ThreadInfo' query packet?
339 This variable (NOT available to the user: auto-detect only!)
340 determines whether GDB will use the new, simpler "ThreadInfo"
341 query or the older, more complex syntax for thread queries.
342 This is an auto-detect variable (set to true at each connect,
343 and set to false when the target fails to recognize it). */
344 bool use_threadinfo_query
= false;
345 bool use_threadextra_query
= false;
347 threadref echo_nextthread
{};
348 threadref nextthread
{};
349 threadref resultthreadlist
[MAXTHREADLISTRESULTS
] {};
351 /* The state of remote notification. */
352 struct remote_notif_state
*notif_state
= nullptr;
354 /* The branch trace configuration. */
355 struct btrace_config btrace_config
{};
357 /* The argument to the last "vFile:setfs:" packet we sent, used
358 to avoid sending repeated unnecessary "vFile:setfs:" packets.
359 Initialized to -1 to indicate that no "vFile:setfs:" packet
360 has yet been sent. */
363 /* A readahead cache for vFile:pread. Often, reading a binary
364 involves a sequence of small reads. E.g., when parsing an ELF
365 file. A readahead cache helps mostly the case of remote
366 debugging on a connection with higher latency, due to the
367 request/reply nature of the RSP. We only cache data for a single
368 file descriptor at a time. */
369 struct readahead_cache readahead_cache
;
371 /* The list of already fetched and acknowledged stop events. This
372 queue is used for notification Stop, and other notifications
373 don't need queue for their events, because the notification
374 events of Stop can't be consumed immediately, so that events
375 should be queued first, and be consumed by remote_wait_{ns,as}
376 one per time. Other notifications can consume their events
377 immediately, so queue is not needed for them. */
378 std::vector
<stop_reply_up
> stop_reply_queue
;
380 /* Asynchronous signal handle registered as event loop source for
381 when we have pending events ready to be passed to the core. */
382 struct async_event_handler
*remote_async_inferior_event_token
= nullptr;
384 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
385 ``forever'' still use the normal timeout mechanism. This is
386 currently used by the ASYNC code to guarentee that target reads
387 during the initial connect always time-out. Once getpkt has been
388 modified to return a timeout indication and, in turn
389 remote_wait()/wait_for_inferior() have gained a timeout parameter
391 int wait_forever_enabled_p
= 1;
394 /* Mapping of remote protocol data for each gdbarch. Usually there
395 is only one entry here, though we may see more with stubs that
396 support multi-process. */
397 std::unordered_map
<struct gdbarch
*, remote_arch_state
>
401 static const target_info remote_target_info
= {
403 N_("Remote serial target in gdb-specific protocol"),
407 class remote_target
: public process_stratum_target
410 remote_target () = default;
411 ~remote_target () override
;
413 const target_info
&info () const override
414 { return remote_target_info
; }
416 const char *connection_string () override
;
418 thread_control_capabilities
get_thread_control_capabilities () override
419 { return tc_schedlock
; }
421 /* Open a remote connection. */
422 static void open (const char *, int);
424 void close () override
;
426 void detach (inferior
*, int) override
;
427 void disconnect (const char *, int) override
;
429 void commit_resumed () override
;
430 void resume (ptid_t
, int, enum gdb_signal
) override
;
431 ptid_t
wait (ptid_t
, struct target_waitstatus
*, target_wait_flags
) override
;
432 bool has_pending_events () override
;
434 void fetch_registers (struct regcache
*, int) override
;
435 void store_registers (struct regcache
*, int) override
;
436 void prepare_to_store (struct regcache
*) override
;
438 void files_info () override
;
440 int insert_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
442 int remove_breakpoint (struct gdbarch
*, struct bp_target_info
*,
443 enum remove_bp_reason
) override
;
446 bool stopped_by_sw_breakpoint () override
;
447 bool supports_stopped_by_sw_breakpoint () override
;
449 bool stopped_by_hw_breakpoint () override
;
451 bool supports_stopped_by_hw_breakpoint () override
;
453 bool stopped_by_watchpoint () override
;
455 bool stopped_data_address (CORE_ADDR
*) override
;
457 bool watchpoint_addr_within_range (CORE_ADDR
, CORE_ADDR
, int) override
;
459 int can_use_hw_breakpoint (enum bptype
, int, int) override
;
461 int insert_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
463 int remove_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
465 int region_ok_for_hw_watchpoint (CORE_ADDR
, int) override
;
467 int insert_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
468 struct expression
*) override
;
470 int remove_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
471 struct expression
*) override
;
473 void kill () override
;
475 void load (const char *, int) override
;
477 void mourn_inferior () override
;
479 void pass_signals (gdb::array_view
<const unsigned char>) override
;
481 int set_syscall_catchpoint (int, bool, int,
482 gdb::array_view
<const int>) override
;
484 void program_signals (gdb::array_view
<const unsigned char>) override
;
486 bool thread_alive (ptid_t ptid
) override
;
488 const char *thread_name (struct thread_info
*) override
;
490 void update_thread_list () override
;
492 std::string
pid_to_str (ptid_t
) override
;
494 const char *extra_thread_info (struct thread_info
*) override
;
496 ptid_t
get_ada_task_ptid (long lwp
, long thread
) override
;
498 thread_info
*thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
500 inferior
*inf
) override
;
502 gdb::byte_vector
thread_info_to_thread_handle (struct thread_info
*tp
)
505 void stop (ptid_t
) override
;
507 void interrupt () override
;
509 void pass_ctrlc () override
;
511 enum target_xfer_status
xfer_partial (enum target_object object
,
514 const gdb_byte
*writebuf
,
515 ULONGEST offset
, ULONGEST len
,
516 ULONGEST
*xfered_len
) override
;
518 ULONGEST
get_memory_xfer_limit () override
;
520 void rcmd (const char *command
, struct ui_file
*output
) override
;
522 char *pid_to_exec_file (int pid
) override
;
524 void log_command (const char *cmd
) override
526 serial_log_command (this, cmd
);
529 CORE_ADDR
get_thread_local_address (ptid_t ptid
,
530 CORE_ADDR load_module_addr
,
531 CORE_ADDR offset
) override
;
533 bool can_execute_reverse () override
;
535 std::vector
<mem_region
> memory_map () override
;
537 void flash_erase (ULONGEST address
, LONGEST length
) override
;
539 void flash_done () override
;
541 const struct target_desc
*read_description () override
;
543 int search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
544 const gdb_byte
*pattern
, ULONGEST pattern_len
,
545 CORE_ADDR
*found_addrp
) override
;
547 bool can_async_p () override
;
549 bool is_async_p () override
;
551 void async (int) override
;
553 int async_wait_fd () override
;
555 void thread_events (int) override
;
557 int can_do_single_step () override
;
559 void terminal_inferior () override
;
561 void terminal_ours () override
;
563 bool supports_non_stop () override
;
565 bool supports_multi_process () override
;
567 bool supports_disable_randomization () override
;
569 bool filesystem_is_local () override
;
572 int fileio_open (struct inferior
*inf
, const char *filename
,
573 int flags
, int mode
, int warn_if_slow
,
574 int *target_errno
) override
;
576 int fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
577 ULONGEST offset
, int *target_errno
) override
;
579 int fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
580 ULONGEST offset
, int *target_errno
) override
;
582 int fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
) override
;
584 int fileio_close (int fd
, int *target_errno
) override
;
586 int fileio_unlink (struct inferior
*inf
,
587 const char *filename
,
588 int *target_errno
) override
;
590 gdb::optional
<std::string
>
591 fileio_readlink (struct inferior
*inf
,
592 const char *filename
,
593 int *target_errno
) override
;
595 bool supports_enable_disable_tracepoint () override
;
597 bool supports_string_tracing () override
;
599 bool supports_evaluation_of_breakpoint_conditions () override
;
601 bool can_run_breakpoint_commands () override
;
603 void trace_init () override
;
605 void download_tracepoint (struct bp_location
*location
) override
;
607 bool can_download_tracepoint () override
;
609 void download_trace_state_variable (const trace_state_variable
&tsv
) override
;
611 void enable_tracepoint (struct bp_location
*location
) override
;
613 void disable_tracepoint (struct bp_location
*location
) override
;
615 void trace_set_readonly_regions () override
;
617 void trace_start () override
;
619 int get_trace_status (struct trace_status
*ts
) override
;
621 void get_tracepoint_status (struct breakpoint
*tp
, struct uploaded_tp
*utp
)
624 void trace_stop () override
;
626 int trace_find (enum trace_find_type type
, int num
,
627 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
) override
;
629 bool get_trace_state_variable_value (int tsv
, LONGEST
*val
) override
;
631 int save_trace_data (const char *filename
) override
;
633 int upload_tracepoints (struct uploaded_tp
**utpp
) override
;
635 int upload_trace_state_variables (struct uploaded_tsv
**utsvp
) override
;
637 LONGEST
get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
) override
;
639 int get_min_fast_tracepoint_insn_len () override
;
641 void set_disconnected_tracing (int val
) override
;
643 void set_circular_trace_buffer (int val
) override
;
645 void set_trace_buffer_size (LONGEST val
) override
;
647 bool set_trace_notes (const char *user
, const char *notes
,
648 const char *stopnotes
) override
;
650 int core_of_thread (ptid_t ptid
) override
;
652 int verify_memory (const gdb_byte
*data
,
653 CORE_ADDR memaddr
, ULONGEST size
) override
;
656 bool get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
) override
;
658 void set_permissions () override
;
660 bool static_tracepoint_marker_at (CORE_ADDR
,
661 struct static_tracepoint_marker
*marker
)
664 std::vector
<static_tracepoint_marker
>
665 static_tracepoint_markers_by_strid (const char *id
) override
;
667 traceframe_info_up
traceframe_info () override
;
669 bool use_agent (bool use
) override
;
670 bool can_use_agent () override
;
672 struct btrace_target_info
*enable_btrace (ptid_t ptid
,
673 const struct btrace_config
*conf
) override
;
675 void disable_btrace (struct btrace_target_info
*tinfo
) override
;
677 void teardown_btrace (struct btrace_target_info
*tinfo
) override
;
679 enum btrace_error
read_btrace (struct btrace_data
*data
,
680 struct btrace_target_info
*btinfo
,
681 enum btrace_read_type type
) override
;
683 const struct btrace_config
*btrace_conf (const struct btrace_target_info
*) override
;
684 bool augmented_libraries_svr4_read () override
;
685 void follow_fork (bool, bool) override
;
686 void follow_exec (struct inferior
*, const char *) override
;
687 int insert_fork_catchpoint (int) override
;
688 int remove_fork_catchpoint (int) override
;
689 int insert_vfork_catchpoint (int) override
;
690 int remove_vfork_catchpoint (int) override
;
691 int insert_exec_catchpoint (int) override
;
692 int remove_exec_catchpoint (int) override
;
693 enum exec_direction_kind
execution_direction () override
;
695 bool supports_memory_tagging () override
;
697 bool fetch_memtags (CORE_ADDR address
, size_t len
,
698 gdb::byte_vector
&tags
, int type
) override
;
700 bool store_memtags (CORE_ADDR address
, size_t len
,
701 const gdb::byte_vector
&tags
, int type
) override
;
703 public: /* Remote specific methods. */
705 void remote_download_command_source (int num
, ULONGEST addr
,
706 struct command_line
*cmds
);
708 void remote_file_put (const char *local_file
, const char *remote_file
,
710 void remote_file_get (const char *remote_file
, const char *local_file
,
712 void remote_file_delete (const char *remote_file
, int from_tty
);
714 int remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
715 ULONGEST offset
, int *remote_errno
);
716 int remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
717 ULONGEST offset
, int *remote_errno
);
718 int remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
719 ULONGEST offset
, int *remote_errno
);
721 int remote_hostio_send_command (int command_bytes
, int which_packet
,
722 int *remote_errno
, const char **attachment
,
723 int *attachment_len
);
724 int remote_hostio_set_filesystem (struct inferior
*inf
,
726 /* We should get rid of this and use fileio_open directly. */
727 int remote_hostio_open (struct inferior
*inf
, const char *filename
,
728 int flags
, int mode
, int warn_if_slow
,
730 int remote_hostio_close (int fd
, int *remote_errno
);
732 int remote_hostio_unlink (inferior
*inf
, const char *filename
,
735 struct remote_state
*get_remote_state ();
737 long get_remote_packet_size (void);
738 long get_memory_packet_size (struct memory_packet_config
*config
);
740 long get_memory_write_packet_size ();
741 long get_memory_read_packet_size ();
743 char *append_pending_thread_resumptions (char *p
, char *endp
,
745 static void open_1 (const char *name
, int from_tty
, int extended_p
);
746 void start_remote (int from_tty
, int extended_p
);
747 void remote_detach_1 (struct inferior
*inf
, int from_tty
);
749 char *append_resumption (char *p
, char *endp
,
750 ptid_t ptid
, int step
, gdb_signal siggnal
);
751 int remote_resume_with_vcont (ptid_t ptid
, int step
,
754 thread_info
*add_current_inferior_and_thread (const char *wait_status
);
756 ptid_t
wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
757 target_wait_flags options
);
758 ptid_t
wait_as (ptid_t ptid
, target_waitstatus
*status
,
759 target_wait_flags options
);
761 ptid_t
process_stop_reply (struct stop_reply
*stop_reply
,
762 target_waitstatus
*status
);
764 ptid_t select_thread_for_ambiguous_stop_reply
765 (const struct target_waitstatus
*status
);
767 void remote_notice_new_inferior (ptid_t currthread
, int executing
);
769 void process_initial_stop_replies (int from_tty
);
771 thread_info
*remote_add_thread (ptid_t ptid
, bool running
, bool executing
);
773 void btrace_sync_conf (const btrace_config
*conf
);
775 void remote_btrace_maybe_reopen ();
777 void remove_new_fork_children (threads_listing_context
*context
);
778 void kill_new_fork_children (int pid
);
779 void discard_pending_stop_replies (struct inferior
*inf
);
780 int stop_reply_queue_length ();
782 void check_pending_events_prevent_wildcard_vcont
783 (int *may_global_wildcard_vcont
);
785 void discard_pending_stop_replies_in_queue ();
786 struct stop_reply
*remote_notif_remove_queued_reply (ptid_t ptid
);
787 struct stop_reply
*queued_stop_reply (ptid_t ptid
);
788 int peek_stop_reply (ptid_t ptid
);
789 void remote_parse_stop_reply (const char *buf
, stop_reply
*event
);
791 void remote_stop_ns (ptid_t ptid
);
792 void remote_interrupt_as ();
793 void remote_interrupt_ns ();
795 char *remote_get_noisy_reply ();
796 int remote_query_attached (int pid
);
797 inferior
*remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
800 ptid_t
remote_current_thread (ptid_t oldpid
);
801 ptid_t
get_current_thread (const char *wait_status
);
803 void set_thread (ptid_t ptid
, int gen
);
804 void set_general_thread (ptid_t ptid
);
805 void set_continue_thread (ptid_t ptid
);
806 void set_general_process ();
808 char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
810 int remote_unpack_thread_info_response (const char *pkt
, threadref
*expectedref
,
811 gdb_ext_thread_info
*info
);
812 int remote_get_threadinfo (threadref
*threadid
, int fieldset
,
813 gdb_ext_thread_info
*info
);
815 int parse_threadlist_response (const char *pkt
, int result_limit
,
816 threadref
*original_echo
,
817 threadref
*resultlist
,
819 int remote_get_threadlist (int startflag
, threadref
*nextthread
,
820 int result_limit
, int *done
, int *result_count
,
821 threadref
*threadlist
);
823 int remote_threadlist_iterator (rmt_thread_action stepfunction
,
824 void *context
, int looplimit
);
826 int remote_get_threads_with_ql (threads_listing_context
*context
);
827 int remote_get_threads_with_qxfer (threads_listing_context
*context
);
828 int remote_get_threads_with_qthreadinfo (threads_listing_context
*context
);
830 void extended_remote_restart ();
834 void remote_check_symbols ();
836 void remote_supported_packet (const struct protocol_feature
*feature
,
837 enum packet_support support
,
838 const char *argument
);
840 void remote_query_supported ();
842 void remote_packet_size (const protocol_feature
*feature
,
843 packet_support support
, const char *value
);
845 void remote_serial_quit_handler ();
847 void remote_detach_pid (int pid
);
849 void remote_vcont_probe ();
851 void remote_resume_with_hc (ptid_t ptid
, int step
,
854 void send_interrupt_sequence ();
855 void interrupt_query ();
857 void remote_notif_get_pending_events (notif_client
*nc
);
859 int fetch_register_using_p (struct regcache
*regcache
,
861 int send_g_packet ();
862 void process_g_packet (struct regcache
*regcache
);
863 void fetch_registers_using_g (struct regcache
*regcache
);
864 int store_register_using_P (const struct regcache
*regcache
,
866 void store_registers_using_G (const struct regcache
*regcache
);
868 void set_remote_traceframe ();
870 void check_binary_download (CORE_ADDR addr
);
872 target_xfer_status
remote_write_bytes_aux (const char *header
,
874 const gdb_byte
*myaddr
,
877 ULONGEST
*xfered_len_units
,
881 target_xfer_status
remote_write_bytes (CORE_ADDR memaddr
,
882 const gdb_byte
*myaddr
, ULONGEST len
,
883 int unit_size
, ULONGEST
*xfered_len
);
885 target_xfer_status
remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
887 int unit_size
, ULONGEST
*xfered_len_units
);
889 target_xfer_status
remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
893 ULONGEST
*xfered_len
);
895 target_xfer_status
remote_read_bytes (CORE_ADDR memaddr
,
896 gdb_byte
*myaddr
, ULONGEST len
,
898 ULONGEST
*xfered_len
);
900 packet_result
remote_send_printf (const char *format
, ...)
901 ATTRIBUTE_PRINTF (2, 3);
903 target_xfer_status
remote_flash_write (ULONGEST address
,
904 ULONGEST length
, ULONGEST
*xfered_len
,
905 const gdb_byte
*data
);
907 int readchar (int timeout
);
909 void remote_serial_write (const char *str
, int len
);
911 int putpkt (const char *buf
);
912 int putpkt_binary (const char *buf
, int cnt
);
914 int putpkt (const gdb::char_vector
&buf
)
916 return putpkt (buf
.data ());
920 long read_frame (gdb::char_vector
*buf_p
);
921 void getpkt (gdb::char_vector
*buf
, int forever
);
922 int getpkt_or_notif_sane_1 (gdb::char_vector
*buf
, int forever
,
923 int expecting_notif
, int *is_notif
);
924 int getpkt_sane (gdb::char_vector
*buf
, int forever
);
925 int getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
927 int remote_vkill (int pid
);
928 void remote_kill_k ();
930 void extended_remote_disable_randomization (int val
);
931 int extended_remote_run (const std::string
&args
);
933 void send_environment_packet (const char *action
,
937 void extended_remote_environment_support ();
938 void extended_remote_set_inferior_cwd ();
940 target_xfer_status
remote_write_qxfer (const char *object_name
,
942 const gdb_byte
*writebuf
,
943 ULONGEST offset
, LONGEST len
,
944 ULONGEST
*xfered_len
,
945 struct packet_config
*packet
);
947 target_xfer_status
remote_read_qxfer (const char *object_name
,
949 gdb_byte
*readbuf
, ULONGEST offset
,
951 ULONGEST
*xfered_len
,
952 struct packet_config
*packet
);
954 void push_stop_reply (struct stop_reply
*new_event
);
956 bool vcont_r_supported ();
958 void packet_command (const char *args
, int from_tty
);
960 private: /* data fields */
962 /* The remote state. Don't reference this directly. Use the
963 get_remote_state method instead. */
964 remote_state m_remote_state
;
967 static const target_info extended_remote_target_info
= {
969 N_("Extended remote serial target in gdb-specific protocol"),
973 /* Set up the extended remote target by extending the standard remote
974 target and adding to it. */
976 class extended_remote_target final
: public remote_target
979 const target_info
&info () const override
980 { return extended_remote_target_info
; }
982 /* Open an extended-remote connection. */
983 static void open (const char *, int);
985 bool can_create_inferior () override
{ return true; }
986 void create_inferior (const char *, const std::string
&,
987 char **, int) override
;
989 void detach (inferior
*, int) override
;
991 bool can_attach () override
{ return true; }
992 void attach (const char *, int) override
;
994 void post_attach (int) override
;
995 bool supports_disable_randomization () override
;
998 /* Per-program-space data key. */
999 static const struct program_space_key
<char, gdb::xfree_deleter
<char>>
1002 /* The variable registered as the control variable used by the
1003 remote exec-file commands. While the remote exec-file setting is
1004 per-program-space, the set/show machinery uses this as the
1005 location of the remote exec-file value. */
1006 static char *remote_exec_file_var
;
1008 /* The size to align memory write packets, when practical. The protocol
1009 does not guarantee any alignment, and gdb will generate short
1010 writes and unaligned writes, but even as a best-effort attempt this
1011 can improve bulk transfers. For instance, if a write is misaligned
1012 relative to the target's data bus, the stub may need to make an extra
1013 round trip fetching data from the target. This doesn't make a
1014 huge difference, but it's easy to do, so we try to be helpful.
1016 The alignment chosen is arbitrary; usually data bus width is
1017 important here, not the possibly larger cache line size. */
1018 enum { REMOTE_ALIGN_WRITES
= 16 };
1020 /* Prototypes for local functions. */
1022 static int hexnumlen (ULONGEST num
);
1024 static int stubhex (int ch
);
1026 static int hexnumstr (char *, ULONGEST
);
1028 static int hexnumnstr (char *, ULONGEST
, int);
1030 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
1032 static void print_packet (const char *);
1034 static int stub_unpack_int (const char *buff
, int fieldlength
);
1036 struct packet_config
;
1038 static void show_packet_config_cmd (struct packet_config
*config
);
1040 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
1042 struct cmd_list_element
*c
,
1045 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
1047 static void remote_async_inferior_event_handler (gdb_client_data
);
1049 static bool remote_read_description_p (struct target_ops
*target
);
1051 static void remote_console_output (const char *msg
);
1053 static void remote_btrace_reset (remote_state
*rs
);
1055 static void remote_unpush_and_throw (remote_target
*target
);
1059 static struct cmd_list_element
*remote_cmdlist
;
1061 /* For "set remote" and "show remote". */
1063 static struct cmd_list_element
*remote_set_cmdlist
;
1064 static struct cmd_list_element
*remote_show_cmdlist
;
1066 /* Controls whether GDB is willing to use range stepping. */
1068 static bool use_range_stepping
= true;
1070 /* From the remote target's point of view, each thread is in one of these three
1072 enum class resume_state
1074 /* Not resumed - we haven't been asked to resume this thread. */
1077 /* We have been asked to resume this thread, but haven't sent a vCont action
1078 for it yet. We'll need to consider it next time commit_resume is
1080 RESUMED_PENDING_VCONT
,
1082 /* We have been asked to resume this thread, and we have sent a vCont action
1087 /* Information about a thread's pending vCont-resume. Used when a thread is in
1088 the remote_resume_state::RESUMED_PENDING_VCONT state. remote_target::resume
1089 stores this information which is then picked up by
1090 remote_target::commit_resume to know which is the proper action for this
1091 thread to include in the vCont packet. */
1092 struct resumed_pending_vcont_info
1094 /* True if the last resume call for this thread was a step request, false
1095 if a continue request. */
1098 /* The signal specified in the last resume call for this thread. */
1102 /* Private data that we'll store in (struct thread_info)->priv. */
1103 struct remote_thread_info
: public private_thread_info
1109 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1110 sequence of bytes. */
1111 gdb::byte_vector thread_handle
;
1113 /* Whether the target stopped for a breakpoint/watchpoint. */
1114 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1116 /* This is set to the data address of the access causing the target
1117 to stop for a watchpoint. */
1118 CORE_ADDR watch_data_address
= 0;
1120 /* Get the thread's resume state. */
1121 enum resume_state
get_resume_state () const
1123 return m_resume_state
;
1126 /* Put the thread in the NOT_RESUMED state. */
1127 void set_not_resumed ()
1129 m_resume_state
= resume_state::NOT_RESUMED
;
1132 /* Put the thread in the RESUMED_PENDING_VCONT state. */
1133 void set_resumed_pending_vcont (bool step
, gdb_signal sig
)
1135 m_resume_state
= resume_state::RESUMED_PENDING_VCONT
;
1136 m_resumed_pending_vcont_info
.step
= step
;
1137 m_resumed_pending_vcont_info
.sig
= sig
;
1140 /* Get the information this thread's pending vCont-resumption.
1142 Must only be called if the thread is in the RESUMED_PENDING_VCONT resume
1144 const struct resumed_pending_vcont_info
&resumed_pending_vcont_info () const
1146 gdb_assert (m_resume_state
== resume_state::RESUMED_PENDING_VCONT
);
1148 return m_resumed_pending_vcont_info
;
1151 /* Put the thread in the VCONT_RESUMED state. */
1154 m_resume_state
= resume_state::RESUMED
;
1158 /* Resume state for this thread. This is used to implement vCont action
1159 coalescing (only when the target operates in non-stop mode).
1161 remote_target::resume moves the thread to the RESUMED_PENDING_VCONT state,
1162 which notes that this thread must be considered in the next commit_resume
1165 remote_target::commit_resume sends a vCont packet with actions for the
1166 threads in the RESUMED_PENDING_VCONT state and moves them to the
1167 VCONT_RESUMED state.
1169 When reporting a stop to the core for a thread, that thread is moved back
1170 to the NOT_RESUMED state. */
1171 enum resume_state m_resume_state
= resume_state::NOT_RESUMED
;
1173 /* Extra info used if the thread is in the RESUMED_PENDING_VCONT state. */
1174 struct resumed_pending_vcont_info m_resumed_pending_vcont_info
;
1177 remote_state::remote_state ()
1182 remote_state::~remote_state ()
1184 xfree (this->last_pass_packet
);
1185 xfree (this->last_program_signals_packet
);
1186 xfree (this->finished_object
);
1187 xfree (this->finished_annex
);
1190 /* Utility: generate error from an incoming stub packet. */
1192 trace_error (char *buf
)
1195 return; /* not an error msg */
1198 case '1': /* malformed packet error */
1199 if (*++buf
== '0') /* general case: */
1200 error (_("remote.c: error in outgoing packet."));
1202 error (_("remote.c: error in outgoing packet at field #%ld."),
1203 strtol (buf
, NULL
, 16));
1205 error (_("Target returns error code '%s'."), buf
);
1209 /* Utility: wait for reply from stub, while accepting "O" packets. */
1212 remote_target::remote_get_noisy_reply ()
1214 struct remote_state
*rs
= get_remote_state ();
1216 do /* Loop on reply from remote stub. */
1220 QUIT
; /* Allow user to bail out with ^C. */
1221 getpkt (&rs
->buf
, 0);
1222 buf
= rs
->buf
.data ();
1225 else if (startswith (buf
, "qRelocInsn:"))
1228 CORE_ADDR from
, to
, org_to
;
1230 int adjusted_size
= 0;
1233 p
= buf
+ strlen ("qRelocInsn:");
1234 pp
= unpack_varlen_hex (p
, &ul
);
1236 error (_("invalid qRelocInsn packet: %s"), buf
);
1240 unpack_varlen_hex (p
, &ul
);
1247 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
1250 catch (const gdb_exception
&ex
)
1252 if (ex
.error
== MEMORY_ERROR
)
1254 /* Propagate memory errors silently back to the
1255 target. The stub may have limited the range of
1256 addresses we can write to, for example. */
1260 /* Something unexpectedly bad happened. Be verbose
1261 so we can tell what, and propagate the error back
1262 to the stub, so it doesn't get stuck waiting for
1264 exception_fprintf (gdb_stderr
, ex
,
1265 _("warning: relocating instruction: "));
1272 adjusted_size
= to
- org_to
;
1274 xsnprintf (buf
, rs
->buf
.size (), "qRelocInsn:%x", adjusted_size
);
1278 else if (buf
[0] == 'O' && buf
[1] != 'K')
1279 remote_console_output (buf
+ 1); /* 'O' message from stub */
1281 return buf
; /* Here's the actual reply. */
1286 struct remote_arch_state
*
1287 remote_state::get_remote_arch_state (struct gdbarch
*gdbarch
)
1289 remote_arch_state
*rsa
;
1291 auto it
= this->m_arch_states
.find (gdbarch
);
1292 if (it
== this->m_arch_states
.end ())
1294 auto p
= this->m_arch_states
.emplace (std::piecewise_construct
,
1295 std::forward_as_tuple (gdbarch
),
1296 std::forward_as_tuple (gdbarch
));
1297 rsa
= &p
.first
->second
;
1299 /* Make sure that the packet buffer is plenty big enough for
1300 this architecture. */
1301 if (this->buf
.size () < rsa
->remote_packet_size
)
1302 this->buf
.resize (2 * rsa
->remote_packet_size
);
1310 /* Fetch the global remote target state. */
1313 remote_target::get_remote_state ()
1315 /* Make sure that the remote architecture state has been
1316 initialized, because doing so might reallocate rs->buf. Any
1317 function which calls getpkt also needs to be mindful of changes
1318 to rs->buf, but this call limits the number of places which run
1320 m_remote_state
.get_remote_arch_state (target_gdbarch ());
1322 return &m_remote_state
;
1325 /* Fetch the remote exec-file from the current program space. */
1328 get_remote_exec_file (void)
1330 char *remote_exec_file
;
1332 remote_exec_file
= remote_pspace_data
.get (current_program_space
);
1333 if (remote_exec_file
== NULL
)
1336 return remote_exec_file
;
1339 /* Set the remote exec file for PSPACE. */
1342 set_pspace_remote_exec_file (struct program_space
*pspace
,
1343 const char *remote_exec_file
)
1345 char *old_file
= remote_pspace_data
.get (pspace
);
1348 remote_pspace_data
.set (pspace
, xstrdup (remote_exec_file
));
1351 /* The "set/show remote exec-file" set command hook. */
1354 set_remote_exec_file (const char *ignored
, int from_tty
,
1355 struct cmd_list_element
*c
)
1357 gdb_assert (remote_exec_file_var
!= NULL
);
1358 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
1361 /* The "set/show remote exec-file" show command hook. */
1364 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
1365 struct cmd_list_element
*cmd
, const char *value
)
1367 fprintf_filtered (file
, "%s\n", get_remote_exec_file ());
1371 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
1373 int regnum
, num_remote_regs
, offset
;
1374 struct packet_reg
**remote_regs
;
1376 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
1378 struct packet_reg
*r
= ®s
[regnum
];
1380 if (register_size (gdbarch
, regnum
) == 0)
1381 /* Do not try to fetch zero-sized (placeholder) registers. */
1384 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
1389 /* Define the g/G packet format as the contents of each register
1390 with a remote protocol number, in order of ascending protocol
1393 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
1394 for (num_remote_regs
= 0, regnum
= 0;
1395 regnum
< gdbarch_num_regs (gdbarch
);
1397 if (regs
[regnum
].pnum
!= -1)
1398 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
1400 std::sort (remote_regs
, remote_regs
+ num_remote_regs
,
1401 [] (const packet_reg
*a
, const packet_reg
*b
)
1402 { return a
->pnum
< b
->pnum
; });
1404 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
1406 remote_regs
[regnum
]->in_g_packet
= 1;
1407 remote_regs
[regnum
]->offset
= offset
;
1408 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
1414 /* Given the architecture described by GDBARCH, return the remote
1415 protocol register's number and the register's offset in the g/G
1416 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1417 If the target does not have a mapping for REGNUM, return false,
1418 otherwise, return true. */
1421 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
1422 int *pnum
, int *poffset
)
1424 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
1426 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
1428 map_regcache_remote_table (gdbarch
, regs
.data ());
1430 *pnum
= regs
[regnum
].pnum
;
1431 *poffset
= regs
[regnum
].offset
;
1436 remote_arch_state::remote_arch_state (struct gdbarch
*gdbarch
)
1438 /* Use the architecture to build a regnum<->pnum table, which will be
1439 1:1 unless a feature set specifies otherwise. */
1440 this->regs
.reset (new packet_reg
[gdbarch_num_regs (gdbarch
)] ());
1442 /* Record the maximum possible size of the g packet - it may turn out
1444 this->sizeof_g_packet
1445 = map_regcache_remote_table (gdbarch
, this->regs
.get ());
1447 /* Default maximum number of characters in a packet body. Many
1448 remote stubs have a hardwired buffer size of 400 bytes
1449 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1450 as the maximum packet-size to ensure that the packet and an extra
1451 NUL character can always fit in the buffer. This stops GDB
1452 trashing stubs that try to squeeze an extra NUL into what is
1453 already a full buffer (As of 1999-12-04 that was most stubs). */
1454 this->remote_packet_size
= 400 - 1;
1456 /* This one is filled in when a ``g'' packet is received. */
1457 this->actual_register_packet_size
= 0;
1459 /* Should rsa->sizeof_g_packet needs more space than the
1460 default, adjust the size accordingly. Remember that each byte is
1461 encoded as two characters. 32 is the overhead for the packet
1462 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1463 (``$NN:G...#NN'') is a better guess, the below has been padded a
1465 if (this->sizeof_g_packet
> ((this->remote_packet_size
- 32) / 2))
1466 this->remote_packet_size
= (this->sizeof_g_packet
* 2 + 32);
1469 /* Get a pointer to the current remote target. If not connected to a
1470 remote target, return NULL. */
1472 static remote_target
*
1473 get_current_remote_target ()
1475 target_ops
*proc_target
= current_inferior ()->process_target ();
1476 return dynamic_cast<remote_target
*> (proc_target
);
1479 /* Return the current allowed size of a remote packet. This is
1480 inferred from the current architecture, and should be used to
1481 limit the length of outgoing packets. */
1483 remote_target::get_remote_packet_size ()
1485 struct remote_state
*rs
= get_remote_state ();
1486 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1488 if (rs
->explicit_packet_size
)
1489 return rs
->explicit_packet_size
;
1491 return rsa
->remote_packet_size
;
1494 static struct packet_reg
*
1495 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1498 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
1502 struct packet_reg
*r
= &rsa
->regs
[regnum
];
1504 gdb_assert (r
->regnum
== regnum
);
1509 static struct packet_reg
*
1510 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1515 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
1517 struct packet_reg
*r
= &rsa
->regs
[i
];
1519 if (r
->pnum
== pnum
)
1525 /* Allow the user to specify what sequence to send to the remote
1526 when he requests a program interruption: Although ^C is usually
1527 what remote systems expect (this is the default, here), it is
1528 sometimes preferable to send a break. On other systems such
1529 as the Linux kernel, a break followed by g, which is Magic SysRq g
1530 is required in order to interrupt the execution. */
1531 const char interrupt_sequence_control_c
[] = "Ctrl-C";
1532 const char interrupt_sequence_break
[] = "BREAK";
1533 const char interrupt_sequence_break_g
[] = "BREAK-g";
1534 static const char *const interrupt_sequence_modes
[] =
1536 interrupt_sequence_control_c
,
1537 interrupt_sequence_break
,
1538 interrupt_sequence_break_g
,
1541 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
1544 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
1545 struct cmd_list_element
*c
,
1548 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
1549 fprintf_filtered (file
,
1550 _("Send the ASCII ETX character (Ctrl-c) "
1551 "to the remote target to interrupt the "
1552 "execution of the program.\n"));
1553 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
1554 fprintf_filtered (file
,
1555 _("send a break signal to the remote target "
1556 "to interrupt the execution of the program.\n"));
1557 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
1558 fprintf_filtered (file
,
1559 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1560 "the remote target to interrupt the execution "
1561 "of Linux kernel.\n"));
1563 internal_error (__FILE__
, __LINE__
,
1564 _("Invalid value for interrupt_sequence_mode: %s."),
1565 interrupt_sequence_mode
);
1568 /* This boolean variable specifies whether interrupt_sequence is sent
1569 to the remote target when gdb connects to it.
1570 This is mostly needed when you debug the Linux kernel: The Linux kernel
1571 expects BREAK g which is Magic SysRq g for connecting gdb. */
1572 static bool interrupt_on_connect
= false;
1574 /* This variable is used to implement the "set/show remotebreak" commands.
1575 Since these commands are now deprecated in favor of "set/show remote
1576 interrupt-sequence", it no longer has any effect on the code. */
1577 static bool remote_break
;
1580 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1583 interrupt_sequence_mode
= interrupt_sequence_break
;
1585 interrupt_sequence_mode
= interrupt_sequence_control_c
;
1589 show_remotebreak (struct ui_file
*file
, int from_tty
,
1590 struct cmd_list_element
*c
,
1595 /* This variable sets the number of bits in an address that are to be
1596 sent in a memory ("M" or "m") packet. Normally, after stripping
1597 leading zeros, the entire address would be sent. This variable
1598 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1599 initial implementation of remote.c restricted the address sent in
1600 memory packets to ``host::sizeof long'' bytes - (typically 32
1601 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1602 address was never sent. Since fixing this bug may cause a break in
1603 some remote targets this variable is principally provided to
1604 facilitate backward compatibility. */
1606 static unsigned int remote_address_size
;
1609 /* User configurable variables for the number of characters in a
1610 memory read/write packet. MIN (rsa->remote_packet_size,
1611 rsa->sizeof_g_packet) is the default. Some targets need smaller
1612 values (fifo overruns, et.al.) and some users need larger values
1613 (speed up transfers). The variables ``preferred_*'' (the user
1614 request), ``current_*'' (what was actually set) and ``forced_*''
1615 (Positive - a soft limit, negative - a hard limit). */
1617 struct memory_packet_config
1624 /* The default max memory-write-packet-size, when the setting is
1625 "fixed". The 16k is historical. (It came from older GDB's using
1626 alloca for buffers and the knowledge (folklore?) that some hosts
1627 don't cope very well with large alloca calls.) */
1628 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1630 /* The minimum remote packet size for memory transfers. Ensures we
1631 can write at least one byte. */
1632 #define MIN_MEMORY_PACKET_SIZE 20
1634 /* Get the memory packet size, assuming it is fixed. */
1637 get_fixed_memory_packet_size (struct memory_packet_config
*config
)
1639 gdb_assert (config
->fixed_p
);
1641 if (config
->size
<= 0)
1642 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
;
1644 return config
->size
;
1647 /* Compute the current size of a read/write packet. Since this makes
1648 use of ``actual_register_packet_size'' the computation is dynamic. */
1651 remote_target::get_memory_packet_size (struct memory_packet_config
*config
)
1653 struct remote_state
*rs
= get_remote_state ();
1654 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1657 if (config
->fixed_p
)
1658 what_they_get
= get_fixed_memory_packet_size (config
);
1661 what_they_get
= get_remote_packet_size ();
1662 /* Limit the packet to the size specified by the user. */
1663 if (config
->size
> 0
1664 && what_they_get
> config
->size
)
1665 what_they_get
= config
->size
;
1667 /* Limit it to the size of the targets ``g'' response unless we have
1668 permission from the stub to use a larger packet size. */
1669 if (rs
->explicit_packet_size
== 0
1670 && rsa
->actual_register_packet_size
> 0
1671 && what_they_get
> rsa
->actual_register_packet_size
)
1672 what_they_get
= rsa
->actual_register_packet_size
;
1674 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1675 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1677 /* Make sure there is room in the global buffer for this packet
1678 (including its trailing NUL byte). */
1679 if (rs
->buf
.size () < what_they_get
+ 1)
1680 rs
->buf
.resize (2 * what_they_get
);
1682 return what_they_get
;
1685 /* Update the size of a read/write packet. If they user wants
1686 something really big then do a sanity check. */
1689 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1691 int fixed_p
= config
->fixed_p
;
1692 long size
= config
->size
;
1695 error (_("Argument required (integer, `fixed' or `limited')."));
1696 else if (strcmp (args
, "hard") == 0
1697 || strcmp (args
, "fixed") == 0)
1699 else if (strcmp (args
, "soft") == 0
1700 || strcmp (args
, "limit") == 0)
1706 size
= strtoul (args
, &end
, 0);
1708 error (_("Invalid %s (bad syntax)."), config
->name
);
1710 /* Instead of explicitly capping the size of a packet to or
1711 disallowing it, the user is allowed to set the size to
1712 something arbitrarily large. */
1716 if (fixed_p
&& !config
->fixed_p
)
1718 /* So that the query shows the correct value. */
1719 long query_size
= (size
<= 0
1720 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1723 if (! query (_("The target may not be able to correctly handle a %s\n"
1724 "of %ld bytes. Change the packet size? "),
1725 config
->name
, query_size
))
1726 error (_("Packet size not changed."));
1728 /* Update the config. */
1729 config
->fixed_p
= fixed_p
;
1730 config
->size
= size
;
1734 show_memory_packet_size (struct memory_packet_config
*config
)
1736 if (config
->size
== 0)
1737 printf_filtered (_("The %s is 0 (default). "), config
->name
);
1739 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1740 if (config
->fixed_p
)
1741 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1742 get_fixed_memory_packet_size (config
));
1745 remote_target
*remote
= get_current_remote_target ();
1748 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1749 remote
->get_memory_packet_size (config
));
1751 puts_filtered ("The actual limit will be further reduced "
1752 "dependent on the target.\n");
1756 /* FIXME: needs to be per-remote-target. */
1757 static struct memory_packet_config memory_write_packet_config
=
1759 "memory-write-packet-size",
1763 set_memory_write_packet_size (const char *args
, int from_tty
)
1765 set_memory_packet_size (args
, &memory_write_packet_config
);
1769 show_memory_write_packet_size (const char *args
, int from_tty
)
1771 show_memory_packet_size (&memory_write_packet_config
);
1774 /* Show the number of hardware watchpoints that can be used. */
1777 show_hardware_watchpoint_limit (struct ui_file
*file
, int from_tty
,
1778 struct cmd_list_element
*c
,
1781 fprintf_filtered (file
, _("The maximum number of target hardware "
1782 "watchpoints is %s.\n"), value
);
1785 /* Show the length limit (in bytes) for hardware watchpoints. */
1788 show_hardware_watchpoint_length_limit (struct ui_file
*file
, int from_tty
,
1789 struct cmd_list_element
*c
,
1792 fprintf_filtered (file
, _("The maximum length (in bytes) of a target "
1793 "hardware watchpoint is %s.\n"), value
);
1796 /* Show the number of hardware breakpoints that can be used. */
1799 show_hardware_breakpoint_limit (struct ui_file
*file
, int from_tty
,
1800 struct cmd_list_element
*c
,
1803 fprintf_filtered (file
, _("The maximum number of target hardware "
1804 "breakpoints is %s.\n"), value
);
1807 /* Controls the maximum number of characters to display in the debug output
1808 for each remote packet. The remaining characters are omitted. */
1810 static int remote_packet_max_chars
= 512;
1812 /* Show the maximum number of characters to display for each remote packet
1813 when remote debugging is enabled. */
1816 show_remote_packet_max_chars (struct ui_file
*file
, int from_tty
,
1817 struct cmd_list_element
*c
,
1820 fprintf_filtered (file
, _("Number of remote packet characters to "
1821 "display is %s.\n"), value
);
1825 remote_target::get_memory_write_packet_size ()
1827 return get_memory_packet_size (&memory_write_packet_config
);
1830 /* FIXME: needs to be per-remote-target. */
1831 static struct memory_packet_config memory_read_packet_config
=
1833 "memory-read-packet-size",
1837 set_memory_read_packet_size (const char *args
, int from_tty
)
1839 set_memory_packet_size (args
, &memory_read_packet_config
);
1843 show_memory_read_packet_size (const char *args
, int from_tty
)
1845 show_memory_packet_size (&memory_read_packet_config
);
1849 remote_target::get_memory_read_packet_size ()
1851 long size
= get_memory_packet_size (&memory_read_packet_config
);
1853 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1854 extra buffer size argument before the memory read size can be
1855 increased beyond this. */
1856 if (size
> get_remote_packet_size ())
1857 size
= get_remote_packet_size ();
1863 struct packet_config
1868 /* If auto, GDB auto-detects support for this packet or feature,
1869 either through qSupported, or by trying the packet and looking
1870 at the response. If true, GDB assumes the target supports this
1871 packet. If false, the packet is disabled. Configs that don't
1872 have an associated command always have this set to auto. */
1873 enum auto_boolean detect
;
1875 /* Does the target support this packet? */
1876 enum packet_support support
;
1879 static enum packet_support
packet_config_support (struct packet_config
*config
);
1880 static enum packet_support
packet_support (int packet
);
1883 show_packet_config_cmd (struct packet_config
*config
)
1885 const char *support
= "internal-error";
1887 switch (packet_config_support (config
))
1890 support
= "enabled";
1892 case PACKET_DISABLE
:
1893 support
= "disabled";
1895 case PACKET_SUPPORT_UNKNOWN
:
1896 support
= "unknown";
1899 switch (config
->detect
)
1901 case AUTO_BOOLEAN_AUTO
:
1902 printf_filtered (_("Support for the `%s' packet "
1903 "is auto-detected, currently %s.\n"),
1904 config
->name
, support
);
1906 case AUTO_BOOLEAN_TRUE
:
1907 case AUTO_BOOLEAN_FALSE
:
1908 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1909 config
->name
, support
);
1915 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1916 const char *title
, int legacy
)
1922 config
->name
= name
;
1923 config
->title
= title
;
1924 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet.",
1926 show_doc
= xstrprintf ("Show current use of remote "
1927 "protocol `%s' (%s) packet.",
1929 /* set/show TITLE-packet {auto,on,off} */
1930 cmd_name
= xstrprintf ("%s-packet", title
);
1931 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1932 &config
->detect
, set_doc
,
1933 show_doc
, NULL
, /* help_doc */
1935 show_remote_protocol_packet_cmd
,
1936 &remote_set_cmdlist
, &remote_show_cmdlist
);
1937 /* The command code copies the documentation strings. */
1940 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1945 legacy_name
= xstrprintf ("%s-packet", name
);
1946 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1947 &remote_set_cmdlist
);
1948 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1949 &remote_show_cmdlist
);
1953 static enum packet_result
1954 packet_check_result (const char *buf
)
1958 /* The stub recognized the packet request. Check that the
1959 operation succeeded. */
1961 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1963 /* "Enn" - definitely an error. */
1964 return PACKET_ERROR
;
1966 /* Always treat "E." as an error. This will be used for
1967 more verbose error messages, such as E.memtypes. */
1968 if (buf
[0] == 'E' && buf
[1] == '.')
1969 return PACKET_ERROR
;
1971 /* The packet may or may not be OK. Just assume it is. */
1975 /* The stub does not support the packet. */
1976 return PACKET_UNKNOWN
;
1979 static enum packet_result
1980 packet_check_result (const gdb::char_vector
&buf
)
1982 return packet_check_result (buf
.data ());
1985 static enum packet_result
1986 packet_ok (const char *buf
, struct packet_config
*config
)
1988 enum packet_result result
;
1990 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1991 && config
->support
== PACKET_DISABLE
)
1992 internal_error (__FILE__
, __LINE__
,
1993 _("packet_ok: attempt to use a disabled packet"));
1995 result
= packet_check_result (buf
);
2000 /* The stub recognized the packet request. */
2001 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
2003 remote_debug_printf ("Packet %s (%s) is supported",
2004 config
->name
, config
->title
);
2005 config
->support
= PACKET_ENABLE
;
2008 case PACKET_UNKNOWN
:
2009 /* The stub does not support the packet. */
2010 if (config
->detect
== AUTO_BOOLEAN_AUTO
2011 && config
->support
== PACKET_ENABLE
)
2013 /* If the stub previously indicated that the packet was
2014 supported then there is a protocol error. */
2015 error (_("Protocol error: %s (%s) conflicting enabled responses."),
2016 config
->name
, config
->title
);
2018 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
2020 /* The user set it wrong. */
2021 error (_("Enabled packet %s (%s) not recognized by stub"),
2022 config
->name
, config
->title
);
2025 remote_debug_printf ("Packet %s (%s) is NOT supported",
2026 config
->name
, config
->title
);
2027 config
->support
= PACKET_DISABLE
;
2034 static enum packet_result
2035 packet_ok (const gdb::char_vector
&buf
, struct packet_config
*config
)
2037 return packet_ok (buf
.data (), config
);
2054 PACKET_vFile_pwrite
,
2056 PACKET_vFile_unlink
,
2057 PACKET_vFile_readlink
,
2060 PACKET_qXfer_features
,
2061 PACKET_qXfer_exec_file
,
2062 PACKET_qXfer_libraries
,
2063 PACKET_qXfer_libraries_svr4
,
2064 PACKET_qXfer_memory_map
,
2065 PACKET_qXfer_osdata
,
2066 PACKET_qXfer_threads
,
2067 PACKET_qXfer_statictrace_read
,
2068 PACKET_qXfer_traceframe_info
,
2074 PACKET_QPassSignals
,
2075 PACKET_QCatchSyscalls
,
2076 PACKET_QProgramSignals
,
2077 PACKET_QSetWorkingDir
,
2078 PACKET_QStartupWithShell
,
2079 PACKET_QEnvironmentHexEncoded
,
2080 PACKET_QEnvironmentReset
,
2081 PACKET_QEnvironmentUnset
,
2083 PACKET_qSearch_memory
,
2086 PACKET_QStartNoAckMode
,
2088 PACKET_qXfer_siginfo_read
,
2089 PACKET_qXfer_siginfo_write
,
2092 /* Support for conditional tracepoints. */
2093 PACKET_ConditionalTracepoints
,
2095 /* Support for target-side breakpoint conditions. */
2096 PACKET_ConditionalBreakpoints
,
2098 /* Support for target-side breakpoint commands. */
2099 PACKET_BreakpointCommands
,
2101 /* Support for fast tracepoints. */
2102 PACKET_FastTracepoints
,
2104 /* Support for static tracepoints. */
2105 PACKET_StaticTracepoints
,
2107 /* Support for installing tracepoints while a trace experiment is
2109 PACKET_InstallInTrace
,
2113 PACKET_TracepointSource
,
2116 PACKET_QDisableRandomization
,
2118 PACKET_QTBuffer_size
,
2122 PACKET_qXfer_btrace
,
2124 /* Support for the QNonStop packet. */
2127 /* Support for the QThreadEvents packet. */
2128 PACKET_QThreadEvents
,
2130 /* Support for multi-process extensions. */
2131 PACKET_multiprocess_feature
,
2133 /* Support for enabling and disabling tracepoints while a trace
2134 experiment is running. */
2135 PACKET_EnableDisableTracepoints_feature
,
2137 /* Support for collecting strings using the tracenz bytecode. */
2138 PACKET_tracenz_feature
,
2140 /* Support for continuing to run a trace experiment while GDB is
2142 PACKET_DisconnectedTracing_feature
,
2144 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2145 PACKET_augmented_libraries_svr4_read_feature
,
2147 /* Support for the qXfer:btrace-conf:read packet. */
2148 PACKET_qXfer_btrace_conf
,
2150 /* Support for the Qbtrace-conf:bts:size packet. */
2151 PACKET_Qbtrace_conf_bts_size
,
2153 /* Support for swbreak+ feature. */
2154 PACKET_swbreak_feature
,
2156 /* Support for hwbreak+ feature. */
2157 PACKET_hwbreak_feature
,
2159 /* Support for fork events. */
2160 PACKET_fork_event_feature
,
2162 /* Support for vfork events. */
2163 PACKET_vfork_event_feature
,
2165 /* Support for the Qbtrace-conf:pt:size packet. */
2166 PACKET_Qbtrace_conf_pt_size
,
2168 /* Support for exec events. */
2169 PACKET_exec_event_feature
,
2171 /* Support for query supported vCont actions. */
2172 PACKET_vContSupported
,
2174 /* Support remote CTRL-C. */
2177 /* Support TARGET_WAITKIND_NO_RESUMED. */
2180 /* Support for memory tagging, allocation tag fetch/store
2181 packets and the tag violation stop replies. */
2182 PACKET_memory_tagging_feature
,
2187 /* FIXME: needs to be per-remote-target. Ignoring this for now,
2188 assuming all remote targets are the same server (thus all support
2189 the same packets). */
2190 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
2192 /* Returns the packet's corresponding "set remote foo-packet" command
2193 state. See struct packet_config for more details. */
2195 static enum auto_boolean
2196 packet_set_cmd_state (int packet
)
2198 return remote_protocol_packets
[packet
].detect
;
2201 /* Returns whether a given packet or feature is supported. This takes
2202 into account the state of the corresponding "set remote foo-packet"
2203 command, which may be used to bypass auto-detection. */
2205 static enum packet_support
2206 packet_config_support (struct packet_config
*config
)
2208 switch (config
->detect
)
2210 case AUTO_BOOLEAN_TRUE
:
2211 return PACKET_ENABLE
;
2212 case AUTO_BOOLEAN_FALSE
:
2213 return PACKET_DISABLE
;
2214 case AUTO_BOOLEAN_AUTO
:
2215 return config
->support
;
2217 gdb_assert_not_reached (_("bad switch"));
2221 /* Same as packet_config_support, but takes the packet's enum value as
2224 static enum packet_support
2225 packet_support (int packet
)
2227 struct packet_config
*config
= &remote_protocol_packets
[packet
];
2229 return packet_config_support (config
);
2233 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
2234 struct cmd_list_element
*c
,
2237 struct packet_config
*packet
;
2239 for (packet
= remote_protocol_packets
;
2240 packet
< &remote_protocol_packets
[PACKET_MAX
];
2243 if (&packet
->detect
== c
->var
)
2245 show_packet_config_cmd (packet
);
2249 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
2253 /* Should we try one of the 'Z' requests? */
2257 Z_PACKET_SOFTWARE_BP
,
2258 Z_PACKET_HARDWARE_BP
,
2265 /* For compatibility with older distributions. Provide a ``set remote
2266 Z-packet ...'' command that updates all the Z packet types. */
2268 static enum auto_boolean remote_Z_packet_detect
;
2271 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
2272 struct cmd_list_element
*c
)
2276 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2277 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
2281 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
2282 struct cmd_list_element
*c
,
2287 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2289 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
2293 /* Returns true if the multi-process extensions are in effect. */
2296 remote_multi_process_p (struct remote_state
*rs
)
2298 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
2301 /* Returns true if fork events are supported. */
2304 remote_fork_event_p (struct remote_state
*rs
)
2306 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
2309 /* Returns true if vfork events are supported. */
2312 remote_vfork_event_p (struct remote_state
*rs
)
2314 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
2317 /* Returns true if exec events are supported. */
2320 remote_exec_event_p (struct remote_state
*rs
)
2322 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
2325 /* Returns true if memory tagging is supported, false otherwise. */
2328 remote_memory_tagging_p ()
2330 return packet_support (PACKET_memory_tagging_feature
) == PACKET_ENABLE
;
2333 /* Insert fork catchpoint target routine. If fork events are enabled
2334 then return success, nothing more to do. */
2337 remote_target::insert_fork_catchpoint (int pid
)
2339 struct remote_state
*rs
= get_remote_state ();
2341 return !remote_fork_event_p (rs
);
2344 /* Remove fork catchpoint target routine. Nothing to do, just
2348 remote_target::remove_fork_catchpoint (int pid
)
2353 /* Insert vfork catchpoint target routine. If vfork events are enabled
2354 then return success, nothing more to do. */
2357 remote_target::insert_vfork_catchpoint (int pid
)
2359 struct remote_state
*rs
= get_remote_state ();
2361 return !remote_vfork_event_p (rs
);
2364 /* Remove vfork catchpoint target routine. Nothing to do, just
2368 remote_target::remove_vfork_catchpoint (int pid
)
2373 /* Insert exec catchpoint target routine. If exec events are
2374 enabled, just return success. */
2377 remote_target::insert_exec_catchpoint (int pid
)
2379 struct remote_state
*rs
= get_remote_state ();
2381 return !remote_exec_event_p (rs
);
2384 /* Remove exec catchpoint target routine. Nothing to do, just
2388 remote_target::remove_exec_catchpoint (int pid
)
2395 /* Take advantage of the fact that the TID field is not used, to tag
2396 special ptids with it set to != 0. */
2397 static const ptid_t
magic_null_ptid (42000, -1, 1);
2398 static const ptid_t
not_sent_ptid (42000, -2, 1);
2399 static const ptid_t
any_thread_ptid (42000, 0, 1);
2401 /* Find out if the stub attached to PID (and hence GDB should offer to
2402 detach instead of killing it when bailing out). */
2405 remote_target::remote_query_attached (int pid
)
2407 struct remote_state
*rs
= get_remote_state ();
2408 size_t size
= get_remote_packet_size ();
2410 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
2413 if (remote_multi_process_p (rs
))
2414 xsnprintf (rs
->buf
.data (), size
, "qAttached:%x", pid
);
2416 xsnprintf (rs
->buf
.data (), size
, "qAttached");
2419 getpkt (&rs
->buf
, 0);
2421 switch (packet_ok (rs
->buf
,
2422 &remote_protocol_packets
[PACKET_qAttached
]))
2425 if (strcmp (rs
->buf
.data (), "1") == 0)
2429 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
2431 case PACKET_UNKNOWN
:
2438 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2439 has been invented by GDB, instead of reported by the target. Since
2440 we can be connected to a remote system before before knowing about
2441 any inferior, mark the target with execution when we find the first
2442 inferior. If ATTACHED is 1, then we had just attached to this
2443 inferior. If it is 0, then we just created this inferior. If it
2444 is -1, then try querying the remote stub to find out if it had
2445 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2446 attempt to open this inferior's executable as the main executable
2447 if no main executable is open already. */
2450 remote_target::remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
2453 struct inferior
*inf
;
2455 /* Check whether this process we're learning about is to be
2456 considered attached, or if is to be considered to have been
2457 spawned by the stub. */
2459 attached
= remote_query_attached (pid
);
2461 if (gdbarch_has_global_solist (target_gdbarch ()))
2463 /* If the target shares code across all inferiors, then every
2464 attach adds a new inferior. */
2465 inf
= add_inferior (pid
);
2467 /* ... and every inferior is bound to the same program space.
2468 However, each inferior may still have its own address
2470 inf
->aspace
= maybe_new_address_space ();
2471 inf
->pspace
= current_program_space
;
2475 /* In the traditional debugging scenario, there's a 1-1 match
2476 between program/address spaces. We simply bind the inferior
2477 to the program space's address space. */
2478 inf
= current_inferior ();
2480 /* However, if the current inferior is already bound to a
2481 process, find some other empty inferior. */
2485 for (inferior
*it
: all_inferiors ())
2494 /* Since all inferiors were already bound to a process, add
2496 inf
= add_inferior_with_spaces ();
2498 switch_to_inferior_no_thread (inf
);
2499 inf
->push_target (this);
2500 inferior_appeared (inf
, pid
);
2503 inf
->attach_flag
= attached
;
2504 inf
->fake_pid_p
= fake_pid_p
;
2506 /* If no main executable is currently open then attempt to
2507 open the file that was executed to create this inferior. */
2508 if (try_open_exec
&& get_exec_file (0) == NULL
)
2509 exec_file_locate_attach (pid
, 0, 1);
2511 /* Check for exec file mismatch, and let the user solve it. */
2512 validate_exec_file (1);
2517 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
2518 static remote_thread_info
*get_remote_thread_info (remote_target
*target
,
2521 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2522 according to RUNNING. */
2525 remote_target::remote_add_thread (ptid_t ptid
, bool running
, bool executing
)
2527 struct remote_state
*rs
= get_remote_state ();
2528 struct thread_info
*thread
;
2530 /* GDB historically didn't pull threads in the initial connection
2531 setup. If the remote target doesn't even have a concept of
2532 threads (e.g., a bare-metal target), even if internally we
2533 consider that a single-threaded target, mentioning a new thread
2534 might be confusing to the user. Be silent then, preserving the
2535 age old behavior. */
2536 if (rs
->starting_up
)
2537 thread
= add_thread_silent (this, ptid
);
2539 thread
= add_thread (this, ptid
);
2541 /* We start by assuming threads are resumed. That state then gets updated
2542 when we process a matching stop reply. */
2543 get_remote_thread_info (thread
)->set_resumed ();
2545 set_executing (this, ptid
, executing
);
2546 set_running (this, ptid
, running
);
2551 /* Come here when we learn about a thread id from the remote target.
2552 It may be the first time we hear about such thread, so take the
2553 opportunity to add it to GDB's thread list. In case this is the
2554 first time we're noticing its corresponding inferior, add it to
2555 GDB's inferior list as well. EXECUTING indicates whether the
2556 thread is (internally) executing or stopped. */
2559 remote_target::remote_notice_new_inferior (ptid_t currthread
, int executing
)
2561 /* In non-stop mode, we assume new found threads are (externally)
2562 running until proven otherwise with a stop reply. In all-stop,
2563 we can only get here if all threads are stopped. */
2564 int running
= target_is_non_stop_p () ? 1 : 0;
2566 /* If this is a new thread, add it to GDB's thread list.
2567 If we leave it up to WFI to do this, bad things will happen. */
2569 thread_info
*tp
= find_thread_ptid (this, currthread
);
2570 if (tp
!= NULL
&& tp
->state
== THREAD_EXITED
)
2572 /* We're seeing an event on a thread id we knew had exited.
2573 This has to be a new thread reusing the old id. Add it. */
2574 remote_add_thread (currthread
, running
, executing
);
2578 if (!in_thread_list (this, currthread
))
2580 struct inferior
*inf
= NULL
;
2581 int pid
= currthread
.pid ();
2583 if (inferior_ptid
.is_pid ()
2584 && pid
== inferior_ptid
.pid ())
2586 /* inferior_ptid has no thread member yet. This can happen
2587 with the vAttach -> remote_wait,"TAAthread:" path if the
2588 stub doesn't support qC. This is the first stop reported
2589 after an attach, so this is the main thread. Update the
2590 ptid in the thread list. */
2591 if (in_thread_list (this, ptid_t (pid
)))
2592 thread_change_ptid (this, inferior_ptid
, currthread
);
2596 = remote_add_thread (currthread
, running
, executing
);
2597 switch_to_thread (thr
);
2602 if (magic_null_ptid
== inferior_ptid
)
2604 /* inferior_ptid is not set yet. This can happen with the
2605 vRun -> remote_wait,"TAAthread:" path if the stub
2606 doesn't support qC. This is the first stop reported
2607 after an attach, so this is the main thread. Update the
2608 ptid in the thread list. */
2609 thread_change_ptid (this, inferior_ptid
, currthread
);
2613 /* When connecting to a target remote, or to a target
2614 extended-remote which already was debugging an inferior, we
2615 may not know about it yet. Add it before adding its child
2616 thread, so notifications are emitted in a sensible order. */
2617 if (find_inferior_pid (this, currthread
.pid ()) == NULL
)
2619 struct remote_state
*rs
= get_remote_state ();
2620 bool fake_pid_p
= !remote_multi_process_p (rs
);
2622 inf
= remote_add_inferior (fake_pid_p
,
2623 currthread
.pid (), -1, 1);
2626 /* This is really a new thread. Add it. */
2627 thread_info
*new_thr
2628 = remote_add_thread (currthread
, running
, executing
);
2630 /* If we found a new inferior, let the common code do whatever
2631 it needs to with it (e.g., read shared libraries, insert
2632 breakpoints), unless we're just setting up an all-stop
2636 struct remote_state
*rs
= get_remote_state ();
2638 if (!rs
->starting_up
)
2639 notice_new_inferior (new_thr
, executing
, 0);
2644 /* Return THREAD's private thread data, creating it if necessary. */
2646 static remote_thread_info
*
2647 get_remote_thread_info (thread_info
*thread
)
2649 gdb_assert (thread
!= NULL
);
2651 if (thread
->priv
== NULL
)
2652 thread
->priv
.reset (new remote_thread_info
);
2654 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
2657 /* Return PTID's private thread data, creating it if necessary. */
2659 static remote_thread_info
*
2660 get_remote_thread_info (remote_target
*target
, ptid_t ptid
)
2662 thread_info
*thr
= find_thread_ptid (target
, ptid
);
2663 return get_remote_thread_info (thr
);
2666 /* Call this function as a result of
2667 1) A halt indication (T packet) containing a thread id
2668 2) A direct query of currthread
2669 3) Successful execution of set thread */
2672 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2674 rs
->general_thread
= currthread
;
2677 /* If 'QPassSignals' is supported, tell the remote stub what signals
2678 it can simply pass through to the inferior without reporting. */
2681 remote_target::pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2683 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2685 char *pass_packet
, *p
;
2687 struct remote_state
*rs
= get_remote_state ();
2689 gdb_assert (pass_signals
.size () < 256);
2690 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2692 if (pass_signals
[i
])
2695 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2696 strcpy (pass_packet
, "QPassSignals:");
2697 p
= pass_packet
+ strlen (pass_packet
);
2698 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2700 if (pass_signals
[i
])
2703 *p
++ = tohex (i
>> 4);
2704 *p
++ = tohex (i
& 15);
2713 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2715 putpkt (pass_packet
);
2716 getpkt (&rs
->buf
, 0);
2717 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2718 xfree (rs
->last_pass_packet
);
2719 rs
->last_pass_packet
= pass_packet
;
2722 xfree (pass_packet
);
2726 /* If 'QCatchSyscalls' is supported, tell the remote stub
2727 to report syscalls to GDB. */
2730 remote_target::set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
2731 gdb::array_view
<const int> syscall_counts
)
2733 const char *catch_packet
;
2734 enum packet_result result
;
2737 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2739 /* Not supported. */
2743 if (needed
&& any_count
== 0)
2745 /* Count how many syscalls are to be caught. */
2746 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2748 if (syscall_counts
[i
] != 0)
2753 remote_debug_printf ("pid %d needed %d any_count %d n_sysno %d",
2754 pid
, needed
, any_count
, n_sysno
);
2756 std::string built_packet
;
2759 /* Prepare a packet with the sysno list, assuming max 8+1
2760 characters for a sysno. If the resulting packet size is too
2761 big, fallback on the non-selective packet. */
2762 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2763 built_packet
.reserve (maxpktsz
);
2764 built_packet
= "QCatchSyscalls:1";
2767 /* Add in each syscall to be caught. */
2768 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2770 if (syscall_counts
[i
] != 0)
2771 string_appendf (built_packet
, ";%zx", i
);
2774 if (built_packet
.size () > get_remote_packet_size ())
2776 /* catch_packet too big. Fallback to less efficient
2777 non selective mode, with GDB doing the filtering. */
2778 catch_packet
= "QCatchSyscalls:1";
2781 catch_packet
= built_packet
.c_str ();
2784 catch_packet
= "QCatchSyscalls:0";
2786 struct remote_state
*rs
= get_remote_state ();
2788 putpkt (catch_packet
);
2789 getpkt (&rs
->buf
, 0);
2790 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2791 if (result
== PACKET_OK
)
2797 /* If 'QProgramSignals' is supported, tell the remote stub what
2798 signals it should pass through to the inferior when detaching. */
2801 remote_target::program_signals (gdb::array_view
<const unsigned char> signals
)
2803 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2807 struct remote_state
*rs
= get_remote_state ();
2809 gdb_assert (signals
.size () < 256);
2810 for (size_t i
= 0; i
< signals
.size (); i
++)
2815 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2816 strcpy (packet
, "QProgramSignals:");
2817 p
= packet
+ strlen (packet
);
2818 for (size_t i
= 0; i
< signals
.size (); i
++)
2820 if (signal_pass_state (i
))
2823 *p
++ = tohex (i
>> 4);
2824 *p
++ = tohex (i
& 15);
2833 if (!rs
->last_program_signals_packet
2834 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2837 getpkt (&rs
->buf
, 0);
2838 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2839 xfree (rs
->last_program_signals_packet
);
2840 rs
->last_program_signals_packet
= packet
;
2847 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2848 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2849 thread. If GEN is set, set the general thread, if not, then set
2850 the step/continue thread. */
2852 remote_target::set_thread (ptid_t ptid
, int gen
)
2854 struct remote_state
*rs
= get_remote_state ();
2855 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2856 char *buf
= rs
->buf
.data ();
2857 char *endbuf
= buf
+ get_remote_packet_size ();
2863 *buf
++ = gen
? 'g' : 'c';
2864 if (ptid
== magic_null_ptid
)
2865 xsnprintf (buf
, endbuf
- buf
, "0");
2866 else if (ptid
== any_thread_ptid
)
2867 xsnprintf (buf
, endbuf
- buf
, "0");
2868 else if (ptid
== minus_one_ptid
)
2869 xsnprintf (buf
, endbuf
- buf
, "-1");
2871 write_ptid (buf
, endbuf
, ptid
);
2873 getpkt (&rs
->buf
, 0);
2875 rs
->general_thread
= ptid
;
2877 rs
->continue_thread
= ptid
;
2881 remote_target::set_general_thread (ptid_t ptid
)
2883 set_thread (ptid
, 1);
2887 remote_target::set_continue_thread (ptid_t ptid
)
2889 set_thread (ptid
, 0);
2892 /* Change the remote current process. Which thread within the process
2893 ends up selected isn't important, as long as it is the same process
2894 as what INFERIOR_PTID points to.
2896 This comes from that fact that there is no explicit notion of
2897 "selected process" in the protocol. The selected process for
2898 general operations is the process the selected general thread
2902 remote_target::set_general_process ()
2904 struct remote_state
*rs
= get_remote_state ();
2906 /* If the remote can't handle multiple processes, don't bother. */
2907 if (!remote_multi_process_p (rs
))
2910 /* We only need to change the remote current thread if it's pointing
2911 at some other process. */
2912 if (rs
->general_thread
.pid () != inferior_ptid
.pid ())
2913 set_general_thread (inferior_ptid
);
2917 /* Return nonzero if this is the main thread that we made up ourselves
2918 to model non-threaded targets as single-threaded. */
2921 remote_thread_always_alive (ptid_t ptid
)
2923 if (ptid
== magic_null_ptid
)
2924 /* The main thread is always alive. */
2927 if (ptid
.pid () != 0 && ptid
.lwp () == 0)
2928 /* The main thread is always alive. This can happen after a
2929 vAttach, if the remote side doesn't support
2936 /* Return nonzero if the thread PTID is still alive on the remote
2940 remote_target::thread_alive (ptid_t ptid
)
2942 struct remote_state
*rs
= get_remote_state ();
2945 /* Check if this is a thread that we made up ourselves to model
2946 non-threaded targets as single-threaded. */
2947 if (remote_thread_always_alive (ptid
))
2950 p
= rs
->buf
.data ();
2951 endp
= p
+ get_remote_packet_size ();
2954 write_ptid (p
, endp
, ptid
);
2957 getpkt (&rs
->buf
, 0);
2958 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2961 /* Return a pointer to a thread name if we know it and NULL otherwise.
2962 The thread_info object owns the memory for the name. */
2965 remote_target::thread_name (struct thread_info
*info
)
2967 if (info
->priv
!= NULL
)
2969 const std::string
&name
= get_remote_thread_info (info
)->name
;
2970 return !name
.empty () ? name
.c_str () : NULL
;
2976 /* About these extended threadlist and threadinfo packets. They are
2977 variable length packets but, the fields within them are often fixed
2978 length. They are redundant enough to send over UDP as is the
2979 remote protocol in general. There is a matching unit test module
2982 /* WARNING: This threadref data structure comes from the remote O.S.,
2983 libstub protocol encoding, and remote.c. It is not particularly
2986 /* Right now, the internal structure is int. We want it to be bigger.
2987 Plan to fix this. */
2989 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2991 /* gdb_ext_thread_info is an internal GDB data structure which is
2992 equivalent to the reply of the remote threadinfo packet. */
2994 struct gdb_ext_thread_info
2996 threadref threadid
; /* External form of thread reference. */
2997 int active
; /* Has state interesting to GDB?
2999 char display
[256]; /* Brief state display, name,
3000 blocked/suspended. */
3001 char shortname
[32]; /* To be used to name threads. */
3002 char more_display
[256]; /* Long info, statistics, queue depth,
3006 /* The volume of remote transfers can be limited by submitting
3007 a mask containing bits specifying the desired information.
3008 Use a union of these values as the 'selection' parameter to
3009 get_thread_info. FIXME: Make these TAG names more thread specific. */
3011 #define TAG_THREADID 1
3012 #define TAG_EXISTS 2
3013 #define TAG_DISPLAY 4
3014 #define TAG_THREADNAME 8
3015 #define TAG_MOREDISPLAY 16
3017 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
3019 static const char *unpack_nibble (const char *buf
, int *val
);
3021 static const char *unpack_byte (const char *buf
, int *value
);
3023 static char *pack_int (char *buf
, int value
);
3025 static const char *unpack_int (const char *buf
, int *value
);
3027 static const char *unpack_string (const char *src
, char *dest
, int length
);
3029 static char *pack_threadid (char *pkt
, threadref
*id
);
3031 static const char *unpack_threadid (const char *inbuf
, threadref
*id
);
3033 void int_to_threadref (threadref
*id
, int value
);
3035 static int threadref_to_int (threadref
*ref
);
3037 static void copy_threadref (threadref
*dest
, threadref
*src
);
3039 static int threadmatch (threadref
*dest
, threadref
*src
);
3041 static char *pack_threadinfo_request (char *pkt
, int mode
,
3044 static char *pack_threadlist_request (char *pkt
, int startflag
,
3046 threadref
*nextthread
);
3048 static int remote_newthread_step (threadref
*ref
, void *context
);
3051 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
3052 buffer we're allowed to write to. Returns
3053 BUF+CHARACTERS_WRITTEN. */
3056 remote_target::write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
3059 struct remote_state
*rs
= get_remote_state ();
3061 if (remote_multi_process_p (rs
))
3065 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
3067 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
3071 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
3073 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
3078 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
3079 last parsed char. Returns null_ptid if no thread id is found, and
3080 throws an error if the thread id has an invalid format. */
3083 read_ptid (const char *buf
, const char **obuf
)
3085 const char *p
= buf
;
3087 ULONGEST pid
= 0, tid
= 0;
3091 /* Multi-process ptid. */
3092 pp
= unpack_varlen_hex (p
+ 1, &pid
);
3094 error (_("invalid remote ptid: %s"), p
);
3097 pp
= unpack_varlen_hex (p
+ 1, &tid
);
3100 return ptid_t (pid
, tid
, 0);
3103 /* No multi-process. Just a tid. */
3104 pp
= unpack_varlen_hex (p
, &tid
);
3106 /* Return null_ptid when no thread id is found. */
3114 /* Since the stub is not sending a process id, then default to
3115 what's in inferior_ptid, unless it's null at this point. If so,
3116 then since there's no way to know the pid of the reported
3117 threads, use the magic number. */
3118 if (inferior_ptid
== null_ptid
)
3119 pid
= magic_null_ptid
.pid ();
3121 pid
= inferior_ptid
.pid ();
3125 return ptid_t (pid
, tid
, 0);
3131 if (ch
>= 'a' && ch
<= 'f')
3132 return ch
- 'a' + 10;
3133 if (ch
>= '0' && ch
<= '9')
3135 if (ch
>= 'A' && ch
<= 'F')
3136 return ch
- 'A' + 10;
3141 stub_unpack_int (const char *buff
, int fieldlength
)
3148 nibble
= stubhex (*buff
++);
3152 retval
= retval
<< 4;
3158 unpack_nibble (const char *buf
, int *val
)
3160 *val
= fromhex (*buf
++);
3165 unpack_byte (const char *buf
, int *value
)
3167 *value
= stub_unpack_int (buf
, 2);
3172 pack_int (char *buf
, int value
)
3174 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
3175 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
3176 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
3177 buf
= pack_hex_byte (buf
, (value
& 0xff));
3182 unpack_int (const char *buf
, int *value
)
3184 *value
= stub_unpack_int (buf
, 8);
3188 #if 0 /* Currently unused, uncomment when needed. */
3189 static char *pack_string (char *pkt
, char *string
);
3192 pack_string (char *pkt
, char *string
)
3197 len
= strlen (string
);
3199 len
= 200; /* Bigger than most GDB packets, junk??? */
3200 pkt
= pack_hex_byte (pkt
, len
);
3204 if ((ch
== '\0') || (ch
== '#'))
3205 ch
= '*'; /* Protect encapsulation. */
3210 #endif /* 0 (unused) */
3213 unpack_string (const char *src
, char *dest
, int length
)
3222 pack_threadid (char *pkt
, threadref
*id
)
3225 unsigned char *altid
;
3227 altid
= (unsigned char *) id
;
3228 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
3230 pkt
= pack_hex_byte (pkt
, *altid
++);
3236 unpack_threadid (const char *inbuf
, threadref
*id
)
3239 const char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
3242 altref
= (char *) id
;
3244 while (inbuf
< limit
)
3246 x
= stubhex (*inbuf
++);
3247 y
= stubhex (*inbuf
++);
3248 *altref
++ = (x
<< 4) | y
;
3253 /* Externally, threadrefs are 64 bits but internally, they are still
3254 ints. This is due to a mismatch of specifications. We would like
3255 to use 64bit thread references internally. This is an adapter
3259 int_to_threadref (threadref
*id
, int value
)
3261 unsigned char *scan
;
3263 scan
= (unsigned char *) id
;
3269 *scan
++ = (value
>> 24) & 0xff;
3270 *scan
++ = (value
>> 16) & 0xff;
3271 *scan
++ = (value
>> 8) & 0xff;
3272 *scan
++ = (value
& 0xff);
3276 threadref_to_int (threadref
*ref
)
3279 unsigned char *scan
;
3285 value
= (value
<< 8) | ((*scan
++) & 0xff);
3290 copy_threadref (threadref
*dest
, threadref
*src
)
3293 unsigned char *csrc
, *cdest
;
3295 csrc
= (unsigned char *) src
;
3296 cdest
= (unsigned char *) dest
;
3303 threadmatch (threadref
*dest
, threadref
*src
)
3305 /* Things are broken right now, so just assume we got a match. */
3307 unsigned char *srcp
, *destp
;
3309 srcp
= (char *) src
;
3310 destp
= (char *) dest
;
3314 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
3321 threadid:1, # always request threadid
3328 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3331 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
3333 *pkt
++ = 'q'; /* Info Query */
3334 *pkt
++ = 'P'; /* process or thread info */
3335 pkt
= pack_int (pkt
, mode
); /* mode */
3336 pkt
= pack_threadid (pkt
, id
); /* threadid */
3337 *pkt
= '\0'; /* terminate */
3341 /* These values tag the fields in a thread info response packet. */
3342 /* Tagging the fields allows us to request specific fields and to
3343 add more fields as time goes by. */
3345 #define TAG_THREADID 1 /* Echo the thread identifier. */
3346 #define TAG_EXISTS 2 /* Is this process defined enough to
3347 fetch registers and its stack? */
3348 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3349 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3350 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3354 remote_target::remote_unpack_thread_info_response (const char *pkt
,
3355 threadref
*expectedref
,
3356 gdb_ext_thread_info
*info
)
3358 struct remote_state
*rs
= get_remote_state ();
3362 const char *limit
= pkt
+ rs
->buf
.size (); /* Plausible parsing limit. */
3365 /* info->threadid = 0; FIXME: implement zero_threadref. */
3367 info
->display
[0] = '\0';
3368 info
->shortname
[0] = '\0';
3369 info
->more_display
[0] = '\0';
3371 /* Assume the characters indicating the packet type have been
3373 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
3374 pkt
= unpack_threadid (pkt
, &ref
);
3377 warning (_("Incomplete response to threadinfo request."));
3378 if (!threadmatch (&ref
, expectedref
))
3379 { /* This is an answer to a different request. */
3380 warning (_("ERROR RMT Thread info mismatch."));
3383 copy_threadref (&info
->threadid
, &ref
);
3385 /* Loop on tagged fields , try to bail if something goes wrong. */
3387 /* Packets are terminated with nulls. */
3388 while ((pkt
< limit
) && mask
&& *pkt
)
3390 pkt
= unpack_int (pkt
, &tag
); /* tag */
3391 pkt
= unpack_byte (pkt
, &length
); /* length */
3392 if (!(tag
& mask
)) /* Tags out of synch with mask. */
3394 warning (_("ERROR RMT: threadinfo tag mismatch."));
3398 if (tag
== TAG_THREADID
)
3402 warning (_("ERROR RMT: length of threadid is not 16."));
3406 pkt
= unpack_threadid (pkt
, &ref
);
3407 mask
= mask
& ~TAG_THREADID
;
3410 if (tag
== TAG_EXISTS
)
3412 info
->active
= stub_unpack_int (pkt
, length
);
3414 mask
= mask
& ~(TAG_EXISTS
);
3417 warning (_("ERROR RMT: 'exists' length too long."));
3423 if (tag
== TAG_THREADNAME
)
3425 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
3426 mask
= mask
& ~TAG_THREADNAME
;
3429 if (tag
== TAG_DISPLAY
)
3431 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
3432 mask
= mask
& ~TAG_DISPLAY
;
3435 if (tag
== TAG_MOREDISPLAY
)
3437 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
3438 mask
= mask
& ~TAG_MOREDISPLAY
;
3441 warning (_("ERROR RMT: unknown thread info tag."));
3442 break; /* Not a tag we know about. */
3448 remote_target::remote_get_threadinfo (threadref
*threadid
,
3450 gdb_ext_thread_info
*info
)
3452 struct remote_state
*rs
= get_remote_state ();
3455 pack_threadinfo_request (rs
->buf
.data (), fieldset
, threadid
);
3457 getpkt (&rs
->buf
, 0);
3459 if (rs
->buf
[0] == '\0')
3462 result
= remote_unpack_thread_info_response (&rs
->buf
[2],
3467 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3470 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
3471 threadref
*nextthread
)
3473 *pkt
++ = 'q'; /* info query packet */
3474 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
3475 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
3476 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
3477 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
3482 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3485 remote_target::parse_threadlist_response (const char *pkt
, int result_limit
,
3486 threadref
*original_echo
,
3487 threadref
*resultlist
,
3490 struct remote_state
*rs
= get_remote_state ();
3491 int count
, resultcount
, done
;
3494 /* Assume the 'q' and 'M chars have been stripped. */
3495 const char *limit
= pkt
+ (rs
->buf
.size () - BUF_THREAD_ID_SIZE
);
3496 /* done parse past here */
3497 pkt
= unpack_byte (pkt
, &count
); /* count field */
3498 pkt
= unpack_nibble (pkt
, &done
);
3499 /* The first threadid is the argument threadid. */
3500 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
3501 while ((count
-- > 0) && (pkt
< limit
))
3503 pkt
= unpack_threadid (pkt
, resultlist
++);
3504 if (resultcount
++ >= result_limit
)
3512 /* Fetch the next batch of threads from the remote. Returns -1 if the
3513 qL packet is not supported, 0 on error and 1 on success. */
3516 remote_target::remote_get_threadlist (int startflag
, threadref
*nextthread
,
3517 int result_limit
, int *done
, int *result_count
,
3518 threadref
*threadlist
)
3520 struct remote_state
*rs
= get_remote_state ();
3523 /* Truncate result limit to be smaller than the packet size. */
3524 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
3525 >= get_remote_packet_size ())
3526 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
3528 pack_threadlist_request (rs
->buf
.data (), startflag
, result_limit
,
3531 getpkt (&rs
->buf
, 0);
3532 if (rs
->buf
[0] == '\0')
3534 /* Packet not supported. */
3539 parse_threadlist_response (&rs
->buf
[2], result_limit
,
3540 &rs
->echo_nextthread
, threadlist
, done
);
3542 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
3544 /* FIXME: This is a good reason to drop the packet. */
3545 /* Possibly, there is a duplicate response. */
3547 retransmit immediatly - race conditions
3548 retransmit after timeout - yes
3550 wait for packet, then exit
3552 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3553 return 0; /* I choose simply exiting. */
3555 if (*result_count
<= 0)
3559 warning (_("RMT ERROR : failed to get remote thread list."));
3562 return result
; /* break; */
3564 if (*result_count
> result_limit
)
3567 warning (_("RMT ERROR: threadlist response longer than requested."));
3573 /* Fetch the list of remote threads, with the qL packet, and call
3574 STEPFUNCTION for each thread found. Stops iterating and returns 1
3575 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3576 STEPFUNCTION returns false. If the packet is not supported,
3580 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction
,
3581 void *context
, int looplimit
)
3583 struct remote_state
*rs
= get_remote_state ();
3584 int done
, i
, result_count
;
3592 if (loopcount
++ > looplimit
)
3595 warning (_("Remote fetch threadlist -infinite loop-."));
3598 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
3599 MAXTHREADLISTRESULTS
,
3600 &done
, &result_count
,
3601 rs
->resultthreadlist
);
3604 /* Clear for later iterations. */
3606 /* Setup to resume next batch of thread references, set nextthread. */
3607 if (result_count
>= 1)
3608 copy_threadref (&rs
->nextthread
,
3609 &rs
->resultthreadlist
[result_count
- 1]);
3611 while (result_count
--)
3613 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
3623 /* A thread found on the remote target. */
3627 explicit thread_item (ptid_t ptid_
)
3631 thread_item (thread_item
&&other
) = default;
3632 thread_item
&operator= (thread_item
&&other
) = default;
3634 DISABLE_COPY_AND_ASSIGN (thread_item
);
3636 /* The thread's PTID. */
3639 /* The thread's extra info. */
3642 /* The thread's name. */
3645 /* The core the thread was running on. -1 if not known. */
3648 /* The thread handle associated with the thread. */
3649 gdb::byte_vector thread_handle
;
3652 /* Context passed around to the various methods listing remote
3653 threads. As new threads are found, they're added to the ITEMS
3656 struct threads_listing_context
3658 /* Return true if this object contains an entry for a thread with ptid
3661 bool contains_thread (ptid_t ptid
) const
3663 auto match_ptid
= [&] (const thread_item
&item
)
3665 return item
.ptid
== ptid
;
3668 auto it
= std::find_if (this->items
.begin (),
3672 return it
!= this->items
.end ();
3675 /* Remove the thread with ptid PTID. */
3677 void remove_thread (ptid_t ptid
)
3679 auto match_ptid
= [&] (const thread_item
&item
)
3681 return item
.ptid
== ptid
;
3684 auto it
= std::remove_if (this->items
.begin (),
3688 if (it
!= this->items
.end ())
3689 this->items
.erase (it
);
3692 /* The threads found on the remote target. */
3693 std::vector
<thread_item
> items
;
3697 remote_newthread_step (threadref
*ref
, void *data
)
3699 struct threads_listing_context
*context
3700 = (struct threads_listing_context
*) data
;
3701 int pid
= inferior_ptid
.pid ();
3702 int lwp
= threadref_to_int (ref
);
3703 ptid_t
ptid (pid
, lwp
);
3705 context
->items
.emplace_back (ptid
);
3707 return 1; /* continue iterator */
3710 #define CRAZY_MAX_THREADS 1000
3713 remote_target::remote_current_thread (ptid_t oldpid
)
3715 struct remote_state
*rs
= get_remote_state ();
3718 getpkt (&rs
->buf
, 0);
3719 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3724 result
= read_ptid (&rs
->buf
[2], &obuf
);
3726 remote_debug_printf ("warning: garbage in qC reply");
3734 /* List remote threads using the deprecated qL packet. */
3737 remote_target::remote_get_threads_with_ql (threads_listing_context
*context
)
3739 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3740 CRAZY_MAX_THREADS
) >= 0)
3746 #if defined(HAVE_LIBEXPAT)
3749 start_thread (struct gdb_xml_parser
*parser
,
3750 const struct gdb_xml_element
*element
,
3752 std::vector
<gdb_xml_value
> &attributes
)
3754 struct threads_listing_context
*data
3755 = (struct threads_listing_context
*) user_data
;
3756 struct gdb_xml_value
*attr
;
3758 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3759 ptid_t ptid
= read_ptid (id
, NULL
);
3761 data
->items
.emplace_back (ptid
);
3762 thread_item
&item
= data
->items
.back ();
3764 attr
= xml_find_attribute (attributes
, "core");
3766 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3768 attr
= xml_find_attribute (attributes
, "name");
3770 item
.name
= (const char *) attr
->value
.get ();
3772 attr
= xml_find_attribute (attributes
, "handle");
3774 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3778 end_thread (struct gdb_xml_parser
*parser
,
3779 const struct gdb_xml_element
*element
,
3780 void *user_data
, const char *body_text
)
3782 struct threads_listing_context
*data
3783 = (struct threads_listing_context
*) user_data
;
3785 if (body_text
!= NULL
&& *body_text
!= '\0')
3786 data
->items
.back ().extra
= body_text
;
3789 const struct gdb_xml_attribute thread_attributes
[] = {
3790 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3791 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3792 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3793 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3794 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3797 const struct gdb_xml_element thread_children
[] = {
3798 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3801 const struct gdb_xml_element threads_children
[] = {
3802 { "thread", thread_attributes
, thread_children
,
3803 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3804 start_thread
, end_thread
},
3805 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3808 const struct gdb_xml_element threads_elements
[] = {
3809 { "threads", NULL
, threads_children
,
3810 GDB_XML_EF_NONE
, NULL
, NULL
},
3811 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3816 /* List remote threads using qXfer:threads:read. */
3819 remote_target::remote_get_threads_with_qxfer (threads_listing_context
*context
)
3821 #if defined(HAVE_LIBEXPAT)
3822 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3824 gdb::optional
<gdb::char_vector
> xml
3825 = target_read_stralloc (this, TARGET_OBJECT_THREADS
, NULL
);
3827 if (xml
&& (*xml
)[0] != '\0')
3829 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3830 threads_elements
, xml
->data (), context
);
3840 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3843 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context
*context
)
3845 struct remote_state
*rs
= get_remote_state ();
3847 if (rs
->use_threadinfo_query
)
3851 putpkt ("qfThreadInfo");
3852 getpkt (&rs
->buf
, 0);
3853 bufp
= rs
->buf
.data ();
3854 if (bufp
[0] != '\0') /* q packet recognized */
3856 while (*bufp
++ == 'm') /* reply contains one or more TID */
3860 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3861 context
->items
.emplace_back (ptid
);
3863 while (*bufp
++ == ','); /* comma-separated list */
3864 putpkt ("qsThreadInfo");
3865 getpkt (&rs
->buf
, 0);
3866 bufp
= rs
->buf
.data ();
3872 /* Packet not recognized. */
3873 rs
->use_threadinfo_query
= 0;
3880 /* Return true if INF only has one non-exited thread. */
3883 has_single_non_exited_thread (inferior
*inf
)
3886 for (thread_info
*tp ATTRIBUTE_UNUSED
: inf
->non_exited_threads ())
3892 /* Implement the to_update_thread_list function for the remote
3896 remote_target::update_thread_list ()
3898 struct threads_listing_context context
;
3901 /* We have a few different mechanisms to fetch the thread list. Try
3902 them all, starting with the most preferred one first, falling
3903 back to older methods. */
3904 if (remote_get_threads_with_qxfer (&context
)
3905 || remote_get_threads_with_qthreadinfo (&context
)
3906 || remote_get_threads_with_ql (&context
))
3910 if (context
.items
.empty ()
3911 && remote_thread_always_alive (inferior_ptid
))
3913 /* Some targets don't really support threads, but still
3914 reply an (empty) thread list in response to the thread
3915 listing packets, instead of replying "packet not
3916 supported". Exit early so we don't delete the main
3921 /* CONTEXT now holds the current thread list on the remote
3922 target end. Delete GDB-side threads no longer found on the
3924 for (thread_info
*tp
: all_threads_safe ())
3926 if (tp
->inf
->process_target () != this)
3929 if (!context
.contains_thread (tp
->ptid
))
3931 /* Do not remove the thread if it is the last thread in
3932 the inferior. This situation happens when we have a
3933 pending exit process status to process. Otherwise we
3934 may end up with a seemingly live inferior (i.e. pid
3935 != 0) that has no threads. */
3936 if (has_single_non_exited_thread (tp
->inf
))
3944 /* Remove any unreported fork child threads from CONTEXT so
3945 that we don't interfere with follow fork, which is where
3946 creation of such threads is handled. */
3947 remove_new_fork_children (&context
);
3949 /* And now add threads we don't know about yet to our list. */
3950 for (thread_item
&item
: context
.items
)
3952 if (item
.ptid
!= null_ptid
)
3954 /* In non-stop mode, we assume new found threads are
3955 executing until proven otherwise with a stop reply.
3956 In all-stop, we can only get here if all threads are
3958 int executing
= target_is_non_stop_p () ? 1 : 0;
3960 remote_notice_new_inferior (item
.ptid
, executing
);
3962 thread_info
*tp
= find_thread_ptid (this, item
.ptid
);
3963 remote_thread_info
*info
= get_remote_thread_info (tp
);
3964 info
->core
= item
.core
;
3965 info
->extra
= std::move (item
.extra
);
3966 info
->name
= std::move (item
.name
);
3967 info
->thread_handle
= std::move (item
.thread_handle
);
3974 /* If no thread listing method is supported, then query whether
3975 each known thread is alive, one by one, with the T packet.
3976 If the target doesn't support threads at all, then this is a
3977 no-op. See remote_thread_alive. */
3983 * Collect a descriptive string about the given thread.
3984 * The target may say anything it wants to about the thread
3985 * (typically info about its blocked / runnable state, name, etc.).
3986 * This string will appear in the info threads display.
3988 * Optional: targets are not required to implement this function.
3992 remote_target::extra_thread_info (thread_info
*tp
)
3994 struct remote_state
*rs
= get_remote_state ();
3997 struct gdb_ext_thread_info threadinfo
;
3999 if (rs
->remote_desc
== 0) /* paranoia */
4000 internal_error (__FILE__
, __LINE__
,
4001 _("remote_threads_extra_info"));
4003 if (tp
->ptid
== magic_null_ptid
4004 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
4005 /* This is the main thread which was added by GDB. The remote
4006 server doesn't know about it. */
4009 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
4011 /* If already have cached info, use it. */
4012 if (!extra
.empty ())
4013 return extra
.c_str ();
4015 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
4017 /* If we're using qXfer:threads:read, then the extra info is
4018 included in the XML. So if we didn't have anything cached,
4019 it's because there's really no extra info. */
4023 if (rs
->use_threadextra_query
)
4025 char *b
= rs
->buf
.data ();
4026 char *endb
= b
+ get_remote_packet_size ();
4028 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
4030 write_ptid (b
, endb
, tp
->ptid
);
4033 getpkt (&rs
->buf
, 0);
4034 if (rs
->buf
[0] != 0)
4036 extra
.resize (strlen (rs
->buf
.data ()) / 2);
4037 hex2bin (rs
->buf
.data (), (gdb_byte
*) &extra
[0], extra
.size ());
4038 return extra
.c_str ();
4042 /* If the above query fails, fall back to the old method. */
4043 rs
->use_threadextra_query
= 0;
4044 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
4045 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
4046 int_to_threadref (&id
, tp
->ptid
.lwp ());
4047 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
4048 if (threadinfo
.active
)
4050 if (*threadinfo
.shortname
)
4051 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
4052 if (*threadinfo
.display
)
4054 if (!extra
.empty ())
4056 string_appendf (extra
, " State: %s", threadinfo
.display
);
4058 if (*threadinfo
.more_display
)
4060 if (!extra
.empty ())
4062 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
4064 return extra
.c_str ();
4071 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
4072 struct static_tracepoint_marker
*marker
)
4074 struct remote_state
*rs
= get_remote_state ();
4075 char *p
= rs
->buf
.data ();
4077 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
4079 p
+= hexnumstr (p
, addr
);
4081 getpkt (&rs
->buf
, 0);
4082 p
= rs
->buf
.data ();
4085 error (_("Remote failure reply: %s"), p
);
4089 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
4096 std::vector
<static_tracepoint_marker
>
4097 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
4099 struct remote_state
*rs
= get_remote_state ();
4100 std::vector
<static_tracepoint_marker
> markers
;
4102 static_tracepoint_marker marker
;
4104 /* Ask for a first packet of static tracepoint marker
4107 getpkt (&rs
->buf
, 0);
4108 p
= rs
->buf
.data ();
4110 error (_("Remote failure reply: %s"), p
);
4116 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
4118 if (strid
== NULL
|| marker
.str_id
== strid
)
4119 markers
.push_back (std::move (marker
));
4121 while (*p
++ == ','); /* comma-separated list */
4122 /* Ask for another packet of static tracepoint definition. */
4124 getpkt (&rs
->buf
, 0);
4125 p
= rs
->buf
.data ();
4132 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4135 remote_target::get_ada_task_ptid (long lwp
, long thread
)
4137 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
4141 /* Restart the remote side; this is an extended protocol operation. */
4144 remote_target::extended_remote_restart ()
4146 struct remote_state
*rs
= get_remote_state ();
4148 /* Send the restart command; for reasons I don't understand the
4149 remote side really expects a number after the "R". */
4150 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "R%x", 0);
4153 remote_fileio_reset ();
4156 /* Clean up connection to a remote debugger. */
4159 remote_target::close ()
4161 /* Make sure we leave stdin registered in the event loop. */
4164 trace_reset_local_state ();
4169 remote_target::~remote_target ()
4171 struct remote_state
*rs
= get_remote_state ();
4173 /* Check for NULL because we may get here with a partially
4174 constructed target/connection. */
4175 if (rs
->remote_desc
== nullptr)
4178 serial_close (rs
->remote_desc
);
4180 /* We are destroying the remote target, so we should discard
4181 everything of this target. */
4182 discard_pending_stop_replies_in_queue ();
4184 if (rs
->remote_async_inferior_event_token
)
4185 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4187 delete rs
->notif_state
;
4190 /* Query the remote side for the text, data and bss offsets. */
4193 remote_target::get_offsets ()
4195 struct remote_state
*rs
= get_remote_state ();
4198 int lose
, num_segments
= 0, do_sections
, do_segments
;
4199 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4201 if (current_program_space
->symfile_object_file
== NULL
)
4204 putpkt ("qOffsets");
4205 getpkt (&rs
->buf
, 0);
4206 buf
= rs
->buf
.data ();
4208 if (buf
[0] == '\000')
4209 return; /* Return silently. Stub doesn't support
4213 warning (_("Remote failure reply: %s"), buf
);
4217 /* Pick up each field in turn. This used to be done with scanf, but
4218 scanf will make trouble if CORE_ADDR size doesn't match
4219 conversion directives correctly. The following code will work
4220 with any size of CORE_ADDR. */
4221 text_addr
= data_addr
= bss_addr
= 0;
4225 if (startswith (ptr
, "Text="))
4228 /* Don't use strtol, could lose on big values. */
4229 while (*ptr
&& *ptr
!= ';')
4230 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4232 if (startswith (ptr
, ";Data="))
4235 while (*ptr
&& *ptr
!= ';')
4236 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4241 if (!lose
&& startswith (ptr
, ";Bss="))
4244 while (*ptr
&& *ptr
!= ';')
4245 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4247 if (bss_addr
!= data_addr
)
4248 warning (_("Target reported unsupported offsets: %s"), buf
);
4253 else if (startswith (ptr
, "TextSeg="))
4256 /* Don't use strtol, could lose on big values. */
4257 while (*ptr
&& *ptr
!= ';')
4258 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4261 if (startswith (ptr
, ";DataSeg="))
4264 while (*ptr
&& *ptr
!= ';')
4265 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4273 error (_("Malformed response to offset query, %s"), buf
);
4274 else if (*ptr
!= '\0')
4275 warning (_("Target reported unsupported offsets: %s"), buf
);
4277 objfile
*objf
= current_program_space
->symfile_object_file
;
4278 section_offsets offs
= objf
->section_offsets
;
4280 symfile_segment_data_up data
= get_symfile_segment_data (objf
->obfd
);
4281 do_segments
= (data
!= NULL
);
4282 do_sections
= num_segments
== 0;
4284 if (num_segments
> 0)
4286 segments
[0] = text_addr
;
4287 segments
[1] = data_addr
;
4289 /* If we have two segments, we can still try to relocate everything
4290 by assuming that the .text and .data offsets apply to the whole
4291 text and data segments. Convert the offsets given in the packet
4292 to base addresses for symfile_map_offsets_to_segments. */
4293 else if (data
!= nullptr && data
->segments
.size () == 2)
4295 segments
[0] = data
->segments
[0].base
+ text_addr
;
4296 segments
[1] = data
->segments
[1].base
+ data_addr
;
4299 /* If the object file has only one segment, assume that it is text
4300 rather than data; main programs with no writable data are rare,
4301 but programs with no code are useless. Of course the code might
4302 have ended up in the data segment... to detect that we would need
4303 the permissions here. */
4304 else if (data
&& data
->segments
.size () == 1)
4306 segments
[0] = data
->segments
[0].base
+ text_addr
;
4309 /* There's no way to relocate by segment. */
4315 int ret
= symfile_map_offsets_to_segments (objf
->obfd
,
4317 num_segments
, segments
);
4319 if (ret
== 0 && !do_sections
)
4320 error (_("Can not handle qOffsets TextSeg "
4321 "response with this symbol file"));
4329 offs
[SECT_OFF_TEXT (objf
)] = text_addr
;
4331 /* This is a temporary kludge to force data and bss to use the
4332 same offsets because that's what nlmconv does now. The real
4333 solution requires changes to the stub and remote.c that I
4334 don't have time to do right now. */
4336 offs
[SECT_OFF_DATA (objf
)] = data_addr
;
4337 offs
[SECT_OFF_BSS (objf
)] = data_addr
;
4340 objfile_relocate (objf
, offs
);
4343 /* Send interrupt_sequence to remote target. */
4346 remote_target::send_interrupt_sequence ()
4348 struct remote_state
*rs
= get_remote_state ();
4350 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4351 remote_serial_write ("\x03", 1);
4352 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4353 serial_send_break (rs
->remote_desc
);
4354 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4356 serial_send_break (rs
->remote_desc
);
4357 remote_serial_write ("g", 1);
4360 internal_error (__FILE__
, __LINE__
,
4361 _("Invalid value for interrupt_sequence_mode: %s."),
4362 interrupt_sequence_mode
);
4366 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4367 and extract the PTID. Returns NULL_PTID if not found. */
4370 stop_reply_extract_thread (const char *stop_reply
)
4372 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4376 /* Txx r:val ; r:val (...) */
4379 /* Look for "register" named "thread". */
4384 p1
= strchr (p
, ':');
4388 if (strncmp (p
, "thread", p1
- p
) == 0)
4389 return read_ptid (++p1
, &p
);
4391 p1
= strchr (p
, ';');
4403 /* Determine the remote side's current thread. If we have a stop
4404 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4405 "thread" register we can extract the current thread from. If not,
4406 ask the remote which is the current thread with qC. The former
4407 method avoids a roundtrip. */
4410 remote_target::get_current_thread (const char *wait_status
)
4412 ptid_t ptid
= null_ptid
;
4414 /* Note we don't use remote_parse_stop_reply as that makes use of
4415 the target architecture, which we haven't yet fully determined at
4417 if (wait_status
!= NULL
)
4418 ptid
= stop_reply_extract_thread (wait_status
);
4419 if (ptid
== null_ptid
)
4420 ptid
= remote_current_thread (inferior_ptid
);
4425 /* Query the remote target for which is the current thread/process,
4426 add it to our tables, and update INFERIOR_PTID. The caller is
4427 responsible for setting the state such that the remote end is ready
4428 to return the current thread.
4430 This function is called after handling the '?' or 'vRun' packets,
4431 whose response is a stop reply from which we can also try
4432 extracting the thread. If the target doesn't support the explicit
4433 qC query, we infer the current thread from that stop reply, passed
4434 in in WAIT_STATUS, which may be NULL.
4436 The function returns pointer to the main thread of the inferior. */
4439 remote_target::add_current_inferior_and_thread (const char *wait_status
)
4441 struct remote_state
*rs
= get_remote_state ();
4442 bool fake_pid_p
= false;
4444 switch_to_no_thread ();
4446 /* Now, if we have thread information, update the current thread's
4448 ptid_t curr_ptid
= get_current_thread (wait_status
);
4450 if (curr_ptid
!= null_ptid
)
4452 if (!remote_multi_process_p (rs
))
4457 /* Without this, some commands which require an active target
4458 (such as kill) won't work. This variable serves (at least)
4459 double duty as both the pid of the target process (if it has
4460 such), and as a flag indicating that a target is active. */
4461 curr_ptid
= magic_null_ptid
;
4465 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4467 /* Add the main thread and switch to it. Don't try reading
4468 registers yet, since we haven't fetched the target description
4470 thread_info
*tp
= add_thread_silent (this, curr_ptid
);
4471 switch_to_thread_no_regs (tp
);
4476 /* Print info about a thread that was found already stopped on
4480 print_one_stopped_thread (struct thread_info
*thread
)
4482 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
4484 switch_to_thread (thread
);
4485 thread
->suspend
.stop_pc
= get_frame_pc (get_current_frame ());
4486 set_current_sal_from_frame (get_current_frame ());
4488 thread
->suspend
.waitstatus_pending_p
= 0;
4490 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
4492 enum gdb_signal sig
= ws
->value
.sig
;
4494 if (signal_print_state (sig
))
4495 gdb::observers::signal_received
.notify (sig
);
4497 gdb::observers::normal_stop
.notify (NULL
, 1);
4500 /* Process all initial stop replies the remote side sent in response
4501 to the ? packet. These indicate threads that were already stopped
4502 on initial connection. We mark these threads as stopped and print
4503 their current frame before giving the user the prompt. */
4506 remote_target::process_initial_stop_replies (int from_tty
)
4508 int pending_stop_replies
= stop_reply_queue_length ();
4509 struct thread_info
*selected
= NULL
;
4510 struct thread_info
*lowest_stopped
= NULL
;
4511 struct thread_info
*first
= NULL
;
4513 /* Consume the initial pending events. */
4514 while (pending_stop_replies
-- > 0)
4516 ptid_t waiton_ptid
= minus_one_ptid
;
4518 struct target_waitstatus ws
;
4519 int ignore_event
= 0;
4521 memset (&ws
, 0, sizeof (ws
));
4522 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4524 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4528 case TARGET_WAITKIND_IGNORE
:
4529 case TARGET_WAITKIND_NO_RESUMED
:
4530 case TARGET_WAITKIND_SIGNALLED
:
4531 case TARGET_WAITKIND_EXITED
:
4532 /* We shouldn't see these, but if we do, just ignore. */
4533 remote_debug_printf ("event ignored");
4537 case TARGET_WAITKIND_EXECD
:
4538 xfree (ws
.value
.execd_pathname
);
4547 thread_info
*evthread
= find_thread_ptid (this, event_ptid
);
4549 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4551 enum gdb_signal sig
= ws
.value
.sig
;
4553 /* Stubs traditionally report SIGTRAP as initial signal,
4554 instead of signal 0. Suppress it. */
4555 if (sig
== GDB_SIGNAL_TRAP
)
4557 evthread
->suspend
.stop_signal
= sig
;
4561 evthread
->suspend
.waitstatus
= ws
;
4563 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4564 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4565 evthread
->suspend
.waitstatus_pending_p
= 1;
4567 set_executing (this, event_ptid
, false);
4568 set_running (this, event_ptid
, false);
4569 get_remote_thread_info (evthread
)->set_not_resumed ();
4572 /* "Notice" the new inferiors before anything related to
4573 registers/memory. */
4574 for (inferior
*inf
: all_non_exited_inferiors (this))
4576 inf
->needs_setup
= 1;
4580 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4581 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4586 /* If all-stop on top of non-stop, pause all threads. Note this
4587 records the threads' stop pc, so must be done after "noticing"
4591 stop_all_threads ();
4593 /* If all threads of an inferior were already stopped, we
4594 haven't setup the inferior yet. */
4595 for (inferior
*inf
: all_non_exited_inferiors (this))
4597 if (inf
->needs_setup
)
4599 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4600 switch_to_thread_no_regs (thread
);
4606 /* Now go over all threads that are stopped, and print their current
4607 frame. If all-stop, then if there's a signalled thread, pick
4609 for (thread_info
*thread
: all_non_exited_threads (this))
4615 thread
->set_running (false);
4616 else if (thread
->state
!= THREAD_STOPPED
)
4619 if (selected
== NULL
4620 && thread
->suspend
.waitstatus_pending_p
)
4623 if (lowest_stopped
== NULL
4624 || thread
->inf
->num
< lowest_stopped
->inf
->num
4625 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4626 lowest_stopped
= thread
;
4629 print_one_stopped_thread (thread
);
4632 /* In all-stop, we only print the status of one thread, and leave
4633 others with their status pending. */
4636 thread_info
*thread
= selected
;
4638 thread
= lowest_stopped
;
4642 print_one_stopped_thread (thread
);
4645 /* For "info program". */
4646 thread_info
*thread
= inferior_thread ();
4647 if (thread
->state
== THREAD_STOPPED
)
4648 set_last_target_status (this, inferior_ptid
, thread
->suspend
.waitstatus
);
4651 /* Start the remote connection and sync state. */
4654 remote_target::start_remote (int from_tty
, int extended_p
)
4656 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
4658 struct remote_state
*rs
= get_remote_state ();
4659 struct packet_config
*noack_config
;
4661 /* Signal other parts that we're going through the initial setup,
4662 and so things may not be stable yet. E.g., we don't try to
4663 install tracepoints until we've relocated symbols. Also, a
4664 Ctrl-C before we're connected and synced up can't interrupt the
4665 target. Instead, it offers to drop the (potentially wedged)
4667 rs
->starting_up
= 1;
4671 if (interrupt_on_connect
)
4672 send_interrupt_sequence ();
4674 /* Ack any packet which the remote side has already sent. */
4675 remote_serial_write ("+", 1);
4677 /* The first packet we send to the target is the optional "supported
4678 packets" request. If the target can answer this, it will tell us
4679 which later probes to skip. */
4680 remote_query_supported ();
4682 /* If the stub wants to get a QAllow, compose one and send it. */
4683 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4686 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4687 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4688 as a reply to known packet. For packet "vFile:setfs:" it is an
4689 invalid reply and GDB would return error in
4690 remote_hostio_set_filesystem, making remote files access impossible.
4691 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4692 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4694 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4696 putpkt (v_mustreplyempty
);
4697 getpkt (&rs
->buf
, 0);
4698 if (strcmp (rs
->buf
.data (), "OK") == 0)
4699 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4700 else if (strcmp (rs
->buf
.data (), "") != 0)
4701 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4705 /* Next, we possibly activate noack mode.
4707 If the QStartNoAckMode packet configuration is set to AUTO,
4708 enable noack mode if the stub reported a wish for it with
4711 If set to TRUE, then enable noack mode even if the stub didn't
4712 report it in qSupported. If the stub doesn't reply OK, the
4713 session ends with an error.
4715 If FALSE, then don't activate noack mode, regardless of what the
4716 stub claimed should be the default with qSupported. */
4718 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4719 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4721 putpkt ("QStartNoAckMode");
4722 getpkt (&rs
->buf
, 0);
4723 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4729 /* Tell the remote that we are using the extended protocol. */
4731 getpkt (&rs
->buf
, 0);
4734 /* Let the target know which signals it is allowed to pass down to
4736 update_signals_program_target ();
4738 /* Next, if the target can specify a description, read it. We do
4739 this before anything involving memory or registers. */
4740 target_find_description ();
4742 /* Next, now that we know something about the target, update the
4743 address spaces in the program spaces. */
4744 update_address_spaces ();
4746 /* On OSs where the list of libraries is global to all
4747 processes, we fetch them early. */
4748 if (gdbarch_has_global_solist (target_gdbarch ()))
4749 solib_add (NULL
, from_tty
, auto_solib_add
);
4751 if (target_is_non_stop_p ())
4753 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4754 error (_("Non-stop mode requested, but remote "
4755 "does not support non-stop"));
4757 putpkt ("QNonStop:1");
4758 getpkt (&rs
->buf
, 0);
4760 if (strcmp (rs
->buf
.data (), "OK") != 0)
4761 error (_("Remote refused setting non-stop mode with: %s"),
4764 /* Find about threads and processes the stub is already
4765 controlling. We default to adding them in the running state.
4766 The '?' query below will then tell us about which threads are
4768 this->update_thread_list ();
4770 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4772 /* Don't assume that the stub can operate in all-stop mode.
4773 Request it explicitly. */
4774 putpkt ("QNonStop:0");
4775 getpkt (&rs
->buf
, 0);
4777 if (strcmp (rs
->buf
.data (), "OK") != 0)
4778 error (_("Remote refused setting all-stop mode with: %s"),
4782 /* Upload TSVs regardless of whether the target is running or not. The
4783 remote stub, such as GDBserver, may have some predefined or builtin
4784 TSVs, even if the target is not running. */
4785 if (get_trace_status (current_trace_status ()) != -1)
4787 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4789 upload_trace_state_variables (&uploaded_tsvs
);
4790 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4793 /* Check whether the target is running now. */
4795 getpkt (&rs
->buf
, 0);
4797 if (!target_is_non_stop_p ())
4799 char *wait_status
= NULL
;
4801 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4804 error (_("The target is not running (try extended-remote?)"));
4806 /* We're connected, but not running. Drop out before we
4807 call start_remote. */
4808 rs
->starting_up
= 0;
4813 /* Save the reply for later. */
4814 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4815 strcpy (wait_status
, rs
->buf
.data ());
4818 /* Fetch thread list. */
4819 target_update_thread_list ();
4821 /* Let the stub know that we want it to return the thread. */
4822 set_continue_thread (minus_one_ptid
);
4824 if (thread_count (this) == 0)
4826 /* Target has no concept of threads at all. GDB treats
4827 non-threaded target as single-threaded; add a main
4829 thread_info
*tp
= add_current_inferior_and_thread (wait_status
);
4830 get_remote_thread_info (tp
)->set_resumed ();
4834 /* We have thread information; select the thread the target
4835 says should be current. If we're reconnecting to a
4836 multi-threaded program, this will ideally be the thread
4837 that last reported an event before GDB disconnected. */
4838 ptid_t curr_thread
= get_current_thread (wait_status
);
4839 if (curr_thread
== null_ptid
)
4841 /* Odd... The target was able to list threads, but not
4842 tell us which thread was current (no "thread"
4843 register in T stop reply?). Just pick the first
4844 thread in the thread list then. */
4846 remote_debug_printf ("warning: couldn't determine remote "
4847 "current thread; picking first in list.");
4849 for (thread_info
*tp
: all_non_exited_threads (this,
4852 switch_to_thread (tp
);
4857 switch_to_thread (find_thread_ptid (this, curr_thread
));
4860 /* init_wait_for_inferior should be called before get_offsets in order
4861 to manage `inserted' flag in bp loc in a correct state.
4862 breakpoint_init_inferior, called from init_wait_for_inferior, set
4863 `inserted' flag to 0, while before breakpoint_re_set, called from
4864 start_remote, set `inserted' flag to 1. In the initialization of
4865 inferior, breakpoint_init_inferior should be called first, and then
4866 breakpoint_re_set can be called. If this order is broken, state of
4867 `inserted' flag is wrong, and cause some problems on breakpoint
4869 init_wait_for_inferior ();
4871 get_offsets (); /* Get text, data & bss offsets. */
4873 /* If we could not find a description using qXfer, and we know
4874 how to do it some other way, try again. This is not
4875 supported for non-stop; it could be, but it is tricky if
4876 there are no stopped threads when we connect. */
4877 if (remote_read_description_p (this)
4878 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4880 target_clear_description ();
4881 target_find_description ();
4884 /* Use the previously fetched status. */
4885 gdb_assert (wait_status
!= NULL
);
4886 strcpy (rs
->buf
.data (), wait_status
);
4887 rs
->cached_wait_status
= 1;
4889 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4893 /* Clear WFI global state. Do this before finding about new
4894 threads and inferiors, and setting the current inferior.
4895 Otherwise we would clear the proceed status of the current
4896 inferior when we want its stop_soon state to be preserved
4897 (see notice_new_inferior). */
4898 init_wait_for_inferior ();
4900 /* In non-stop, we will either get an "OK", meaning that there
4901 are no stopped threads at this time; or, a regular stop
4902 reply. In the latter case, there may be more than one thread
4903 stopped --- we pull them all out using the vStopped
4905 if (strcmp (rs
->buf
.data (), "OK") != 0)
4907 struct notif_client
*notif
= ¬if_client_stop
;
4909 /* remote_notif_get_pending_replies acks this one, and gets
4911 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4912 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4913 remote_notif_get_pending_events (notif
);
4916 if (thread_count (this) == 0)
4919 error (_("The target is not running (try extended-remote?)"));
4921 /* We're connected, but not running. Drop out before we
4922 call start_remote. */
4923 rs
->starting_up
= 0;
4927 /* Report all signals during attach/startup. */
4930 /* If there are already stopped threads, mark them stopped and
4931 report their stops before giving the prompt to the user. */
4932 process_initial_stop_replies (from_tty
);
4934 if (target_can_async_p ())
4938 /* If we connected to a live target, do some additional setup. */
4939 if (target_has_execution ())
4941 /* No use without a symbol-file. */
4942 if (current_program_space
->symfile_object_file
)
4943 remote_check_symbols ();
4946 /* Possibly the target has been engaged in a trace run started
4947 previously; find out where things are at. */
4948 if (get_trace_status (current_trace_status ()) != -1)
4950 struct uploaded_tp
*uploaded_tps
= NULL
;
4952 if (current_trace_status ()->running
)
4953 printf_filtered (_("Trace is already running on the target.\n"));
4955 upload_tracepoints (&uploaded_tps
);
4957 merge_uploaded_tracepoints (&uploaded_tps
);
4960 /* Possibly the target has been engaged in a btrace record started
4961 previously; find out where things are at. */
4962 remote_btrace_maybe_reopen ();
4964 /* The thread and inferior lists are now synchronized with the
4965 target, our symbols have been relocated, and we're merged the
4966 target's tracepoints with ours. We're done with basic start
4968 rs
->starting_up
= 0;
4970 /* Maybe breakpoints are global and need to be inserted now. */
4971 if (breakpoints_should_be_inserted_now ())
4972 insert_breakpoints ();
4976 remote_target::connection_string ()
4978 remote_state
*rs
= get_remote_state ();
4980 if (rs
->remote_desc
->name
!= NULL
)
4981 return rs
->remote_desc
->name
;
4986 /* Open a connection to a remote debugger.
4987 NAME is the filename used for communication. */
4990 remote_target::open (const char *name
, int from_tty
)
4992 open_1 (name
, from_tty
, 0);
4995 /* Open a connection to a remote debugger using the extended
4996 remote gdb protocol. NAME is the filename used for communication. */
4999 extended_remote_target::open (const char *name
, int from_tty
)
5001 open_1 (name
, from_tty
, 1 /*extended_p */);
5004 /* Reset all packets back to "unknown support". Called when opening a
5005 new connection to a remote target. */
5008 reset_all_packet_configs_support (void)
5012 for (i
= 0; i
< PACKET_MAX
; i
++)
5013 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5016 /* Initialize all packet configs. */
5019 init_all_packet_configs (void)
5023 for (i
= 0; i
< PACKET_MAX
; i
++)
5025 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
5026 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5030 /* Symbol look-up. */
5033 remote_target::remote_check_symbols ()
5038 /* The remote side has no concept of inferiors that aren't running
5039 yet, it only knows about running processes. If we're connected
5040 but our current inferior is not running, we should not invite the
5041 remote target to request symbol lookups related to its
5042 (unrelated) current process. */
5043 if (!target_has_execution ())
5046 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
5049 /* Make sure the remote is pointing at the right process. Note
5050 there's no way to select "no process". */
5051 set_general_process ();
5053 /* Allocate a message buffer. We can't reuse the input buffer in RS,
5054 because we need both at the same time. */
5055 gdb::char_vector
msg (get_remote_packet_size ());
5056 gdb::char_vector
reply (get_remote_packet_size ());
5058 /* Invite target to request symbol lookups. */
5060 putpkt ("qSymbol::");
5062 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
5064 while (startswith (reply
.data (), "qSymbol:"))
5066 struct bound_minimal_symbol sym
;
5069 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
5072 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
5073 if (sym
.minsym
== NULL
)
5074 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
5078 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5079 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
5081 /* If this is a function address, return the start of code
5082 instead of any data function descriptor. */
5083 sym_addr
= gdbarch_convert_from_func_ptr_addr
5084 (target_gdbarch (), sym_addr
, current_inferior ()->top_target ());
5086 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
5087 phex_nz (sym_addr
, addr_size
), &reply
[8]);
5090 putpkt (msg
.data ());
5095 static struct serial
*
5096 remote_serial_open (const char *name
)
5098 static int udp_warning
= 0;
5100 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
5101 of in ser-tcp.c, because it is the remote protocol assuming that the
5102 serial connection is reliable and not the serial connection promising
5104 if (!udp_warning
&& startswith (name
, "udp:"))
5106 warning (_("The remote protocol may be unreliable over UDP.\n"
5107 "Some events may be lost, rendering further debugging "
5112 return serial_open (name
);
5115 /* Inform the target of our permission settings. The permission flags
5116 work without this, but if the target knows the settings, it can do
5117 a couple things. First, it can add its own check, to catch cases
5118 that somehow manage to get by the permissions checks in target
5119 methods. Second, if the target is wired to disallow particular
5120 settings (for instance, a system in the field that is not set up to
5121 be able to stop at a breakpoint), it can object to any unavailable
5125 remote_target::set_permissions ()
5127 struct remote_state
*rs
= get_remote_state ();
5129 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
5130 "WriteReg:%x;WriteMem:%x;"
5131 "InsertBreak:%x;InsertTrace:%x;"
5132 "InsertFastTrace:%x;Stop:%x",
5133 may_write_registers
, may_write_memory
,
5134 may_insert_breakpoints
, may_insert_tracepoints
,
5135 may_insert_fast_tracepoints
, may_stop
);
5137 getpkt (&rs
->buf
, 0);
5139 /* If the target didn't like the packet, warn the user. Do not try
5140 to undo the user's settings, that would just be maddening. */
5141 if (strcmp (rs
->buf
.data (), "OK") != 0)
5142 warning (_("Remote refused setting permissions with: %s"),
5146 /* This type describes each known response to the qSupported
5148 struct protocol_feature
5150 /* The name of this protocol feature. */
5153 /* The default for this protocol feature. */
5154 enum packet_support default_support
;
5156 /* The function to call when this feature is reported, or after
5157 qSupported processing if the feature is not supported.
5158 The first argument points to this structure. The second
5159 argument indicates whether the packet requested support be
5160 enabled, disabled, or probed (or the default, if this function
5161 is being called at the end of processing and this feature was
5162 not reported). The third argument may be NULL; if not NULL, it
5163 is a NUL-terminated string taken from the packet following
5164 this feature's name and an equals sign. */
5165 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5166 enum packet_support
, const char *);
5168 /* The corresponding packet for this feature. Only used if
5169 FUNC is remote_supported_packet. */
5174 remote_supported_packet (remote_target
*remote
,
5175 const struct protocol_feature
*feature
,
5176 enum packet_support support
,
5177 const char *argument
)
5181 warning (_("Remote qSupported response supplied an unexpected value for"
5182 " \"%s\"."), feature
->name
);
5186 remote_protocol_packets
[feature
->packet
].support
= support
;
5190 remote_target::remote_packet_size (const protocol_feature
*feature
,
5191 enum packet_support support
, const char *value
)
5193 struct remote_state
*rs
= get_remote_state ();
5198 if (support
!= PACKET_ENABLE
)
5201 if (value
== NULL
|| *value
== '\0')
5203 warning (_("Remote target reported \"%s\" without a size."),
5209 packet_size
= strtol (value
, &value_end
, 16);
5210 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5212 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5213 feature
->name
, value
);
5217 /* Record the new maximum packet size. */
5218 rs
->explicit_packet_size
= packet_size
;
5222 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5223 enum packet_support support
, const char *value
)
5225 remote
->remote_packet_size (feature
, support
, value
);
5228 static const struct protocol_feature remote_protocol_features
[] = {
5229 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5230 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5231 PACKET_qXfer_auxv
},
5232 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5233 PACKET_qXfer_exec_file
},
5234 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5235 PACKET_qXfer_features
},
5236 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5237 PACKET_qXfer_libraries
},
5238 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5239 PACKET_qXfer_libraries_svr4
},
5240 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5241 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5242 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5243 PACKET_qXfer_memory_map
},
5244 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5245 PACKET_qXfer_osdata
},
5246 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5247 PACKET_qXfer_threads
},
5248 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5249 PACKET_qXfer_traceframe_info
},
5250 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5251 PACKET_QPassSignals
},
5252 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5253 PACKET_QCatchSyscalls
},
5254 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5255 PACKET_QProgramSignals
},
5256 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5257 PACKET_QSetWorkingDir
},
5258 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5259 PACKET_QStartupWithShell
},
5260 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5261 PACKET_QEnvironmentHexEncoded
},
5262 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5263 PACKET_QEnvironmentReset
},
5264 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5265 PACKET_QEnvironmentUnset
},
5266 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5267 PACKET_QStartNoAckMode
},
5268 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5269 PACKET_multiprocess_feature
},
5270 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5271 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5272 PACKET_qXfer_siginfo_read
},
5273 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5274 PACKET_qXfer_siginfo_write
},
5275 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5276 PACKET_ConditionalTracepoints
},
5277 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5278 PACKET_ConditionalBreakpoints
},
5279 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5280 PACKET_BreakpointCommands
},
5281 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5282 PACKET_FastTracepoints
},
5283 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5284 PACKET_StaticTracepoints
},
5285 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5286 PACKET_InstallInTrace
},
5287 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5288 PACKET_DisconnectedTracing_feature
},
5289 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5291 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5293 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5294 PACKET_TracepointSource
},
5295 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5297 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5298 PACKET_EnableDisableTracepoints_feature
},
5299 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5300 PACKET_qXfer_fdpic
},
5301 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5303 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5304 PACKET_QDisableRandomization
},
5305 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5306 { "QTBuffer:size", PACKET_DISABLE
,
5307 remote_supported_packet
, PACKET_QTBuffer_size
},
5308 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5309 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5310 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5311 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5312 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5313 PACKET_qXfer_btrace
},
5314 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5315 PACKET_qXfer_btrace_conf
},
5316 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5317 PACKET_Qbtrace_conf_bts_size
},
5318 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5319 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5320 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5321 PACKET_fork_event_feature
},
5322 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5323 PACKET_vfork_event_feature
},
5324 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5325 PACKET_exec_event_feature
},
5326 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5327 PACKET_Qbtrace_conf_pt_size
},
5328 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5329 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5330 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5331 { "memory-tagging", PACKET_DISABLE
, remote_supported_packet
,
5332 PACKET_memory_tagging_feature
},
5335 static char *remote_support_xml
;
5337 /* Register string appended to "xmlRegisters=" in qSupported query. */
5340 register_remote_support_xml (const char *xml
)
5342 #if defined(HAVE_LIBEXPAT)
5343 if (remote_support_xml
== NULL
)
5344 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5347 char *copy
= xstrdup (remote_support_xml
+ 13);
5349 char *p
= strtok_r (copy
, ",", &saveptr
);
5353 if (strcmp (p
, xml
) == 0)
5360 while ((p
= strtok_r (NULL
, ",", &saveptr
)) != NULL
);
5363 remote_support_xml
= reconcat (remote_support_xml
,
5364 remote_support_xml
, ",", xml
,
5371 remote_query_supported_append (std::string
*msg
, const char *append
)
5375 msg
->append (append
);
5379 remote_target::remote_query_supported ()
5381 struct remote_state
*rs
= get_remote_state ();
5384 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5386 /* The packet support flags are handled differently for this packet
5387 than for most others. We treat an error, a disabled packet, and
5388 an empty response identically: any features which must be reported
5389 to be used will be automatically disabled. An empty buffer
5390 accomplishes this, since that is also the representation for a list
5391 containing no features. */
5394 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5398 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5399 remote_query_supported_append (&q
, "multiprocess+");
5401 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5402 remote_query_supported_append (&q
, "swbreak+");
5403 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5404 remote_query_supported_append (&q
, "hwbreak+");
5406 remote_query_supported_append (&q
, "qRelocInsn+");
5408 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5409 != AUTO_BOOLEAN_FALSE
)
5410 remote_query_supported_append (&q
, "fork-events+");
5411 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5412 != AUTO_BOOLEAN_FALSE
)
5413 remote_query_supported_append (&q
, "vfork-events+");
5414 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5415 != AUTO_BOOLEAN_FALSE
)
5416 remote_query_supported_append (&q
, "exec-events+");
5418 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5419 remote_query_supported_append (&q
, "vContSupported+");
5421 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5422 remote_query_supported_append (&q
, "QThreadEvents+");
5424 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5425 remote_query_supported_append (&q
, "no-resumed+");
5427 if (packet_set_cmd_state (PACKET_memory_tagging_feature
)
5428 != AUTO_BOOLEAN_FALSE
)
5429 remote_query_supported_append (&q
, "memory-tagging+");
5431 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5432 the qSupported:xmlRegisters=i386 handling. */
5433 if (remote_support_xml
!= NULL
5434 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5435 remote_query_supported_append (&q
, remote_support_xml
);
5437 q
= "qSupported:" + q
;
5438 putpkt (q
.c_str ());
5440 getpkt (&rs
->buf
, 0);
5442 /* If an error occured, warn, but do not return - just reset the
5443 buffer to empty and go on to disable features. */
5444 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5447 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5452 memset (seen
, 0, sizeof (seen
));
5454 next
= rs
->buf
.data ();
5457 enum packet_support is_supported
;
5458 char *p
, *end
, *name_end
, *value
;
5460 /* First separate out this item from the rest of the packet. If
5461 there's another item after this, we overwrite the separator
5462 (terminated strings are much easier to work with). */
5464 end
= strchr (p
, ';');
5467 end
= p
+ strlen (p
);
5477 warning (_("empty item in \"qSupported\" response"));
5482 name_end
= strchr (p
, '=');
5485 /* This is a name=value entry. */
5486 is_supported
= PACKET_ENABLE
;
5487 value
= name_end
+ 1;
5496 is_supported
= PACKET_ENABLE
;
5500 is_supported
= PACKET_DISABLE
;
5504 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5508 warning (_("unrecognized item \"%s\" "
5509 "in \"qSupported\" response"), p
);
5515 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5516 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5518 const struct protocol_feature
*feature
;
5521 feature
= &remote_protocol_features
[i
];
5522 feature
->func (this, feature
, is_supported
, value
);
5527 /* If we increased the packet size, make sure to increase the global
5528 buffer size also. We delay this until after parsing the entire
5529 qSupported packet, because this is the same buffer we were
5531 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5532 rs
->buf
.resize (rs
->explicit_packet_size
);
5534 /* Handle the defaults for unmentioned features. */
5535 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5538 const struct protocol_feature
*feature
;
5540 feature
= &remote_protocol_features
[i
];
5541 feature
->func (this, feature
, feature
->default_support
, NULL
);
5545 /* Serial QUIT handler for the remote serial descriptor.
5547 Defers handling a Ctrl-C until we're done with the current
5548 command/response packet sequence, unless:
5550 - We're setting up the connection. Don't send a remote interrupt
5551 request, as we're not fully synced yet. Quit immediately
5554 - The target has been resumed in the foreground
5555 (target_terminal::is_ours is false) with a synchronous resume
5556 packet, and we're blocked waiting for the stop reply, thus a
5557 Ctrl-C should be immediately sent to the target.
5559 - We get a second Ctrl-C while still within the same serial read or
5560 write. In that case the serial is seemingly wedged --- offer to
5563 - We see a second Ctrl-C without target response, after having
5564 previously interrupted the target. In that case the target/stub
5565 is probably wedged --- offer to quit/disconnect.
5569 remote_target::remote_serial_quit_handler ()
5571 struct remote_state
*rs
= get_remote_state ();
5573 if (check_quit_flag ())
5575 /* If we're starting up, we're not fully synced yet. Quit
5577 if (rs
->starting_up
)
5579 else if (rs
->got_ctrlc_during_io
)
5581 if (query (_("The target is not responding to GDB commands.\n"
5582 "Stop debugging it? ")))
5583 remote_unpush_and_throw (this);
5585 /* If ^C has already been sent once, offer to disconnect. */
5586 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5588 /* All-stop protocol, and blocked waiting for stop reply. Send
5589 an interrupt request. */
5590 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5591 target_interrupt ();
5593 rs
->got_ctrlc_during_io
= 1;
5597 /* The remote_target that is current while the quit handler is
5598 overridden with remote_serial_quit_handler. */
5599 static remote_target
*curr_quit_handler_target
;
5602 remote_serial_quit_handler ()
5604 curr_quit_handler_target
->remote_serial_quit_handler ();
5607 /* Remove the remote target from the target stack of each inferior
5608 that is using it. Upper targets depend on it so remove them
5612 remote_unpush_target (remote_target
*target
)
5614 /* We have to unpush the target from all inferiors, even those that
5616 scoped_restore_current_inferior restore_current_inferior
;
5618 for (inferior
*inf
: all_inferiors (target
))
5620 switch_to_inferior_no_thread (inf
);
5621 pop_all_targets_at_and_above (process_stratum
);
5622 generic_mourn_inferior ();
5627 remote_unpush_and_throw (remote_target
*target
)
5629 remote_unpush_target (target
);
5630 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5634 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5636 remote_target
*curr_remote
= get_current_remote_target ();
5639 error (_("To open a remote debug connection, you need to specify what\n"
5640 "serial device is attached to the remote system\n"
5641 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5643 /* If we're connected to a running target, target_preopen will kill it.
5644 Ask this question first, before target_preopen has a chance to kill
5646 if (curr_remote
!= NULL
&& !target_has_execution ())
5649 && !query (_("Already connected to a remote target. Disconnect? ")))
5650 error (_("Still connected."));
5653 /* Here the possibly existing remote target gets unpushed. */
5654 target_preopen (from_tty
);
5656 remote_fileio_reset ();
5657 reopen_exec_file ();
5660 remote_target
*remote
5661 = (extended_p
? new extended_remote_target () : new remote_target ());
5662 target_ops_up
target_holder (remote
);
5664 remote_state
*rs
= remote
->get_remote_state ();
5666 /* See FIXME above. */
5667 if (!target_async_permitted
)
5668 rs
->wait_forever_enabled_p
= 1;
5670 rs
->remote_desc
= remote_serial_open (name
);
5671 if (!rs
->remote_desc
)
5672 perror_with_name (name
);
5674 if (baud_rate
!= -1)
5676 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5678 /* The requested speed could not be set. Error out to
5679 top level after closing remote_desc. Take care to
5680 set remote_desc to NULL to avoid closing remote_desc
5682 serial_close (rs
->remote_desc
);
5683 rs
->remote_desc
= NULL
;
5684 perror_with_name (name
);
5688 serial_setparity (rs
->remote_desc
, serial_parity
);
5689 serial_raw (rs
->remote_desc
);
5691 /* If there is something sitting in the buffer we might take it as a
5692 response to a command, which would be bad. */
5693 serial_flush_input (rs
->remote_desc
);
5697 puts_filtered ("Remote debugging using ");
5698 puts_filtered (name
);
5699 puts_filtered ("\n");
5702 /* Switch to using the remote target now. */
5703 current_inferior ()->push_target (std::move (target_holder
));
5705 /* Register extra event sources in the event loop. */
5706 rs
->remote_async_inferior_event_token
5707 = create_async_event_handler (remote_async_inferior_event_handler
, nullptr,
5709 rs
->notif_state
= remote_notif_state_allocate (remote
);
5711 /* Reset the target state; these things will be queried either by
5712 remote_query_supported or as they are needed. */
5713 reset_all_packet_configs_support ();
5714 rs
->cached_wait_status
= 0;
5715 rs
->explicit_packet_size
= 0;
5717 rs
->extended
= extended_p
;
5718 rs
->waiting_for_stop_reply
= 0;
5719 rs
->ctrlc_pending_p
= 0;
5720 rs
->got_ctrlc_during_io
= 0;
5722 rs
->general_thread
= not_sent_ptid
;
5723 rs
->continue_thread
= not_sent_ptid
;
5724 rs
->remote_traceframe_number
= -1;
5726 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5728 /* Probe for ability to use "ThreadInfo" query, as required. */
5729 rs
->use_threadinfo_query
= 1;
5730 rs
->use_threadextra_query
= 1;
5732 rs
->readahead_cache
.invalidate ();
5734 if (target_async_permitted
)
5736 /* FIXME: cagney/1999-09-23: During the initial connection it is
5737 assumed that the target is already ready and able to respond to
5738 requests. Unfortunately remote_start_remote() eventually calls
5739 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5740 around this. Eventually a mechanism that allows
5741 wait_for_inferior() to expect/get timeouts will be
5743 rs
->wait_forever_enabled_p
= 0;
5746 /* First delete any symbols previously loaded from shared libraries. */
5747 no_shared_libraries (NULL
, 0);
5749 /* Start the remote connection. If error() or QUIT, discard this
5750 target (we'd otherwise be in an inconsistent state) and then
5751 propogate the error on up the exception chain. This ensures that
5752 the caller doesn't stumble along blindly assuming that the
5753 function succeeded. The CLI doesn't have this problem but other
5754 UI's, such as MI do.
5756 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5757 this function should return an error indication letting the
5758 caller restore the previous state. Unfortunately the command
5759 ``target remote'' is directly wired to this function making that
5760 impossible. On a positive note, the CLI side of this problem has
5761 been fixed - the function set_cmd_context() makes it possible for
5762 all the ``target ....'' commands to share a common callback
5763 function. See cli-dump.c. */
5768 remote
->start_remote (from_tty
, extended_p
);
5770 catch (const gdb_exception
&ex
)
5772 /* Pop the partially set up target - unless something else did
5773 already before throwing the exception. */
5774 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5775 remote_unpush_target (remote
);
5780 remote_btrace_reset (rs
);
5782 if (target_async_permitted
)
5783 rs
->wait_forever_enabled_p
= 1;
5786 /* Detach the specified process. */
5789 remote_target::remote_detach_pid (int pid
)
5791 struct remote_state
*rs
= get_remote_state ();
5793 /* This should not be necessary, but the handling for D;PID in
5794 GDBserver versions prior to 8.2 incorrectly assumes that the
5795 selected process points to the same process we're detaching,
5796 leading to misbehavior (and possibly GDBserver crashing) when it
5797 does not. Since it's easy and cheap, work around it by forcing
5798 GDBserver to select GDB's current process. */
5799 set_general_process ();
5801 if (remote_multi_process_p (rs
))
5802 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5804 strcpy (rs
->buf
.data (), "D");
5807 getpkt (&rs
->buf
, 0);
5809 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5811 else if (rs
->buf
[0] == '\0')
5812 error (_("Remote doesn't know how to detach"));
5814 error (_("Can't detach process."));
5817 /* This detaches a program to which we previously attached, using
5818 inferior_ptid to identify the process. After this is done, GDB
5819 can be used to debug some other program. We better not have left
5820 any breakpoints in the target program or it'll die when it hits
5824 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5826 int pid
= inferior_ptid
.pid ();
5827 struct remote_state
*rs
= get_remote_state ();
5830 if (!target_has_execution ())
5831 error (_("No process to detach from."));
5833 target_announce_detach (from_tty
);
5835 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
5837 /* If we're in breakpoints-always-inserted mode, or the inferior
5838 is running, we have to remove breakpoints before detaching.
5839 We don't do this in common code instead because not all
5840 targets support removing breakpoints while the target is
5841 running. The remote target / gdbserver does, though. */
5842 remove_breakpoints_inf (current_inferior ());
5845 /* Tell the remote target to detach. */
5846 remote_detach_pid (pid
);
5848 /* Exit only if this is the only active inferior. */
5849 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors (this) == 1)
5850 puts_filtered (_("Ending remote debugging.\n"));
5852 thread_info
*tp
= find_thread_ptid (this, inferior_ptid
);
5854 /* Check to see if we are detaching a fork parent. Note that if we
5855 are detaching a fork child, tp == NULL. */
5856 is_fork_parent
= (tp
!= NULL
5857 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5859 /* If doing detach-on-fork, we don't mourn, because that will delete
5860 breakpoints that should be available for the followed inferior. */
5861 if (!is_fork_parent
)
5863 /* Save the pid as a string before mourning, since that will
5864 unpush the remote target, and we need the string after. */
5865 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5867 target_mourn_inferior (inferior_ptid
);
5868 if (print_inferior_events
)
5869 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5870 inf
->num
, infpid
.c_str ());
5874 switch_to_no_thread ();
5875 detach_inferior (current_inferior ());
5880 remote_target::detach (inferior
*inf
, int from_tty
)
5882 remote_detach_1 (inf
, from_tty
);
5886 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5888 remote_detach_1 (inf
, from_tty
);
5891 /* Target follow-fork function for remote targets. On entry, and
5892 at return, the current inferior is the fork parent.
5894 Note that although this is currently only used for extended-remote,
5895 it is named remote_follow_fork in anticipation of using it for the
5896 remote target as well. */
5899 remote_target::follow_fork (bool follow_child
, bool detach_fork
)
5901 struct remote_state
*rs
= get_remote_state ();
5902 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5904 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5905 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5907 /* When following the parent and detaching the child, we detach
5908 the child here. For the case of following the child and
5909 detaching the parent, the detach is done in the target-
5910 independent follow fork code in infrun.c. We can't use
5911 target_detach when detaching an unfollowed child because
5912 the client side doesn't know anything about the child. */
5913 if (detach_fork
&& !follow_child
)
5915 /* Detach the fork child. */
5919 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5920 child_pid
= child_ptid
.pid ();
5922 remote_detach_pid (child_pid
);
5927 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5928 in the program space of the new inferior. On entry and at return the
5929 current inferior is the exec'ing inferior. INF is the new exec'd
5930 inferior, which may be the same as the exec'ing inferior unless
5931 follow-exec-mode is "new". */
5934 remote_target::follow_exec (struct inferior
*inf
, const char *execd_pathname
)
5936 /* We know that this is a target file name, so if it has the "target:"
5937 prefix we strip it off before saving it in the program space. */
5938 if (is_target_filename (execd_pathname
))
5939 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5941 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5944 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5947 remote_target::disconnect (const char *args
, int from_tty
)
5950 error (_("Argument given to \"disconnect\" when remotely debugging."));
5952 /* Make sure we unpush even the extended remote targets. Calling
5953 target_mourn_inferior won't unpush, and
5954 remote_target::mourn_inferior won't unpush if there is more than
5955 one inferior left. */
5956 remote_unpush_target (this);
5959 puts_filtered ("Ending remote debugging.\n");
5962 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5963 be chatty about it. */
5966 extended_remote_target::attach (const char *args
, int from_tty
)
5968 struct remote_state
*rs
= get_remote_state ();
5970 char *wait_status
= NULL
;
5972 pid
= parse_pid_to_attach (args
);
5974 /* Remote PID can be freely equal to getpid, do not check it here the same
5975 way as in other targets. */
5977 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5978 error (_("This target does not support attaching to a process"));
5982 const char *exec_file
= get_exec_file (0);
5985 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5986 target_pid_to_str (ptid_t (pid
)).c_str ());
5988 printf_unfiltered (_("Attaching to %s\n"),
5989 target_pid_to_str (ptid_t (pid
)).c_str ());
5992 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
5994 getpkt (&rs
->buf
, 0);
5996 switch (packet_ok (rs
->buf
,
5997 &remote_protocol_packets
[PACKET_vAttach
]))
6000 if (!target_is_non_stop_p ())
6002 /* Save the reply for later. */
6003 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
6004 strcpy (wait_status
, rs
->buf
.data ());
6006 else if (strcmp (rs
->buf
.data (), "OK") != 0)
6007 error (_("Attaching to %s failed with: %s"),
6008 target_pid_to_str (ptid_t (pid
)).c_str (),
6011 case PACKET_UNKNOWN
:
6012 error (_("This target does not support attaching to a process"));
6014 error (_("Attaching to %s failed"),
6015 target_pid_to_str (ptid_t (pid
)).c_str ());
6018 switch_to_inferior_no_thread (remote_add_inferior (false, pid
, 1, 0));
6020 inferior_ptid
= ptid_t (pid
);
6022 if (target_is_non_stop_p ())
6024 /* Get list of threads. */
6025 update_thread_list ();
6027 thread_info
*thread
= first_thread_of_inferior (current_inferior ());
6028 if (thread
!= nullptr)
6029 switch_to_thread (thread
);
6031 /* Invalidate our notion of the remote current thread. */
6032 record_currthread (rs
, minus_one_ptid
);
6036 /* Now, if we have thread information, update the main thread's
6038 ptid_t curr_ptid
= remote_current_thread (ptid_t (pid
));
6040 /* Add the main thread to the thread list. */
6041 thread_info
*thr
= add_thread_silent (this, curr_ptid
);
6043 switch_to_thread (thr
);
6045 /* Don't consider the thread stopped until we've processed the
6046 saved stop reply. */
6047 set_executing (this, thr
->ptid
, true);
6050 /* Next, if the target can specify a description, read it. We do
6051 this before anything involving memory or registers. */
6052 target_find_description ();
6054 if (!target_is_non_stop_p ())
6056 /* Use the previously fetched status. */
6057 gdb_assert (wait_status
!= NULL
);
6059 if (target_can_async_p ())
6061 struct notif_event
*reply
6062 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
6064 push_stop_reply ((struct stop_reply
*) reply
);
6070 gdb_assert (wait_status
!= NULL
);
6071 strcpy (rs
->buf
.data (), wait_status
);
6072 rs
->cached_wait_status
= 1;
6077 gdb_assert (wait_status
== NULL
);
6079 gdb_assert (target_can_async_p ());
6084 /* Implementation of the to_post_attach method. */
6087 extended_remote_target::post_attach (int pid
)
6089 /* Get text, data & bss offsets. */
6092 /* In certain cases GDB might not have had the chance to start
6093 symbol lookup up until now. This could happen if the debugged
6094 binary is not using shared libraries, the vsyscall page is not
6095 present (on Linux) and the binary itself hadn't changed since the
6096 debugging process was started. */
6097 if (current_program_space
->symfile_object_file
!= NULL
)
6098 remote_check_symbols();
6102 /* Check for the availability of vCont. This function should also check
6106 remote_target::remote_vcont_probe ()
6108 remote_state
*rs
= get_remote_state ();
6111 strcpy (rs
->buf
.data (), "vCont?");
6113 getpkt (&rs
->buf
, 0);
6114 buf
= rs
->buf
.data ();
6116 /* Make sure that the features we assume are supported. */
6117 if (startswith (buf
, "vCont"))
6120 int support_c
, support_C
;
6122 rs
->supports_vCont
.s
= 0;
6123 rs
->supports_vCont
.S
= 0;
6126 rs
->supports_vCont
.t
= 0;
6127 rs
->supports_vCont
.r
= 0;
6128 while (p
&& *p
== ';')
6131 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6132 rs
->supports_vCont
.s
= 1;
6133 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6134 rs
->supports_vCont
.S
= 1;
6135 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6137 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6139 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6140 rs
->supports_vCont
.t
= 1;
6141 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6142 rs
->supports_vCont
.r
= 1;
6144 p
= strchr (p
, ';');
6147 /* If c, and C are not all supported, we can't use vCont. Clearing
6148 BUF will make packet_ok disable the packet. */
6149 if (!support_c
|| !support_C
)
6153 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
6154 rs
->supports_vCont_probed
= true;
6157 /* Helper function for building "vCont" resumptions. Write a
6158 resumption to P. ENDP points to one-passed-the-end of the buffer
6159 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6160 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6161 resumed thread should be single-stepped and/or signalled. If PTID
6162 equals minus_one_ptid, then all threads are resumed; if PTID
6163 represents a process, then all threads of the process are resumed;
6164 the thread to be stepped and/or signalled is given in the global
6168 remote_target::append_resumption (char *p
, char *endp
,
6169 ptid_t ptid
, int step
, gdb_signal siggnal
)
6171 struct remote_state
*rs
= get_remote_state ();
6173 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6174 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6176 /* GDB is willing to range step. */
6177 && use_range_stepping
6178 /* Target supports range stepping. */
6179 && rs
->supports_vCont
.r
6180 /* We don't currently support range stepping multiple
6181 threads with a wildcard (though the protocol allows it,
6182 so stubs shouldn't make an active effort to forbid
6184 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6186 struct thread_info
*tp
;
6188 if (ptid
== minus_one_ptid
)
6190 /* If we don't know about the target thread's tid, then
6191 we're resuming magic_null_ptid (see caller). */
6192 tp
= find_thread_ptid (this, magic_null_ptid
);
6195 tp
= find_thread_ptid (this, ptid
);
6196 gdb_assert (tp
!= NULL
);
6198 if (tp
->control
.may_range_step
)
6200 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6202 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6203 phex_nz (tp
->control
.step_range_start
,
6205 phex_nz (tp
->control
.step_range_end
,
6209 p
+= xsnprintf (p
, endp
- p
, ";s");
6212 p
+= xsnprintf (p
, endp
- p
, ";s");
6213 else if (siggnal
!= GDB_SIGNAL_0
)
6214 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6216 p
+= xsnprintf (p
, endp
- p
, ";c");
6218 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6222 /* All (-1) threads of process. */
6223 nptid
= ptid_t (ptid
.pid (), -1, 0);
6225 p
+= xsnprintf (p
, endp
- p
, ":");
6226 p
= write_ptid (p
, endp
, nptid
);
6228 else if (ptid
!= minus_one_ptid
)
6230 p
+= xsnprintf (p
, endp
- p
, ":");
6231 p
= write_ptid (p
, endp
, ptid
);
6237 /* Clear the thread's private info on resume. */
6240 resume_clear_thread_private_info (struct thread_info
*thread
)
6242 if (thread
->priv
!= NULL
)
6244 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6246 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6247 priv
->watch_data_address
= 0;
6251 /* Append a vCont continue-with-signal action for threads that have a
6252 non-zero stop signal. */
6255 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6258 for (thread_info
*thread
: all_non_exited_threads (this, ptid
))
6259 if (inferior_ptid
!= thread
->ptid
6260 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
6262 p
= append_resumption (p
, endp
, thread
->ptid
,
6263 0, thread
->suspend
.stop_signal
);
6264 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
6265 resume_clear_thread_private_info (thread
);
6271 /* Set the target running, using the packets that use Hc
6275 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6278 struct remote_state
*rs
= get_remote_state ();
6281 rs
->last_sent_signal
= siggnal
;
6282 rs
->last_sent_step
= step
;
6284 /* The c/s/C/S resume packets use Hc, so set the continue
6286 if (ptid
== minus_one_ptid
)
6287 set_continue_thread (any_thread_ptid
);
6289 set_continue_thread (ptid
);
6291 for (thread_info
*thread
: all_non_exited_threads (this))
6292 resume_clear_thread_private_info (thread
);
6294 buf
= rs
->buf
.data ();
6295 if (::execution_direction
== EXEC_REVERSE
)
6297 /* We don't pass signals to the target in reverse exec mode. */
6298 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6299 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6302 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6303 error (_("Remote reverse-step not supported."));
6304 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6305 error (_("Remote reverse-continue not supported."));
6307 strcpy (buf
, step
? "bs" : "bc");
6309 else if (siggnal
!= GDB_SIGNAL_0
)
6311 buf
[0] = step
? 'S' : 'C';
6312 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6313 buf
[2] = tohex (((int) siggnal
) & 0xf);
6317 strcpy (buf
, step
? "s" : "c");
6322 /* Resume the remote inferior by using a "vCont" packet. The thread
6323 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6324 resumed thread should be single-stepped and/or signalled. If PTID
6325 equals minus_one_ptid, then all threads are resumed; the thread to
6326 be stepped and/or signalled is given in the global INFERIOR_PTID.
6327 This function returns non-zero iff it resumes the inferior.
6329 This function issues a strict subset of all possible vCont commands
6333 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6334 enum gdb_signal siggnal
)
6336 struct remote_state
*rs
= get_remote_state ();
6340 /* No reverse execution actions defined for vCont. */
6341 if (::execution_direction
== EXEC_REVERSE
)
6344 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6345 remote_vcont_probe ();
6347 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6350 p
= rs
->buf
.data ();
6351 endp
= p
+ get_remote_packet_size ();
6353 /* If we could generate a wider range of packets, we'd have to worry
6354 about overflowing BUF. Should there be a generic
6355 "multi-part-packet" packet? */
6357 p
+= xsnprintf (p
, endp
- p
, "vCont");
6359 if (ptid
== magic_null_ptid
)
6361 /* MAGIC_NULL_PTID means that we don't have any active threads,
6362 so we don't have any TID numbers the inferior will
6363 understand. Make sure to only send forms that do not specify
6365 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6367 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6369 /* Resume all threads (of all processes, or of a single
6370 process), with preference for INFERIOR_PTID. This assumes
6371 inferior_ptid belongs to the set of all threads we are about
6373 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6375 /* Step inferior_ptid, with or without signal. */
6376 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6379 /* Also pass down any pending signaled resumption for other
6380 threads not the current. */
6381 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6383 /* And continue others without a signal. */
6384 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6388 /* Scheduler locking; resume only PTID. */
6389 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6392 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6395 if (target_is_non_stop_p ())
6397 /* In non-stop, the stub replies to vCont with "OK". The stop
6398 reply will be reported asynchronously by means of a `%Stop'
6400 getpkt (&rs
->buf
, 0);
6401 if (strcmp (rs
->buf
.data (), "OK") != 0)
6402 error (_("Unexpected vCont reply in non-stop mode: %s"),
6409 /* Tell the remote machine to resume. */
6412 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6414 struct remote_state
*rs
= get_remote_state ();
6416 /* When connected in non-stop mode, the core resumes threads
6417 individually. Resuming remote threads directly in target_resume
6418 would thus result in sending one packet per thread. Instead, to
6419 minimize roundtrip latency, here we just store the resume
6420 request (put the thread in RESUMED_PENDING_VCONT state); the actual remote
6421 resumption will be done in remote_target::commit_resume, where we'll be
6422 able to do vCont action coalescing. */
6423 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6425 remote_thread_info
*remote_thr
;
6427 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6428 remote_thr
= get_remote_thread_info (this, inferior_ptid
);
6430 remote_thr
= get_remote_thread_info (this, ptid
);
6432 /* We don't expect the core to ask to resume an already resumed (from
6433 its point of view) thread. */
6434 gdb_assert (remote_thr
->get_resume_state () == resume_state::NOT_RESUMED
);
6436 remote_thr
->set_resumed_pending_vcont (step
, siggnal
);
6440 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6441 (explained in remote-notif.c:handle_notification) so
6442 remote_notif_process is not called. We need find a place where
6443 it is safe to start a 'vNotif' sequence. It is good to do it
6444 before resuming inferior, because inferior was stopped and no RSP
6445 traffic at that moment. */
6446 if (!target_is_non_stop_p ())
6447 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6449 rs
->last_resume_exec_dir
= ::execution_direction
;
6451 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6452 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6453 remote_resume_with_hc (ptid
, step
, siggnal
);
6455 /* Update resumed state tracked by the remote target. */
6456 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6457 get_remote_thread_info (tp
)->set_resumed ();
6459 /* We are about to start executing the inferior, let's register it
6460 with the event loop. NOTE: this is the one place where all the
6461 execution commands end up. We could alternatively do this in each
6462 of the execution commands in infcmd.c. */
6463 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6464 into infcmd.c in order to allow inferior function calls to work
6465 NOT asynchronously. */
6466 if (target_can_async_p ())
6469 /* We've just told the target to resume. The remote server will
6470 wait for the inferior to stop, and then send a stop reply. In
6471 the mean time, we can't start another command/query ourselves
6472 because the stub wouldn't be ready to process it. This applies
6473 only to the base all-stop protocol, however. In non-stop (which
6474 only supports vCont), the stub replies with an "OK", and is
6475 immediate able to process further serial input. */
6476 if (!target_is_non_stop_p ())
6477 rs
->waiting_for_stop_reply
= 1;
6480 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6482 /* Private per-inferior info for target remote processes. */
6484 struct remote_inferior
: public private_inferior
6486 /* Whether we can send a wildcard vCont for this process. */
6487 bool may_wildcard_vcont
= true;
6490 /* Get the remote private inferior data associated to INF. */
6492 static remote_inferior
*
6493 get_remote_inferior (inferior
*inf
)
6495 if (inf
->priv
== NULL
)
6496 inf
->priv
.reset (new remote_inferior
);
6498 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6501 struct stop_reply
: public notif_event
6505 /* The identifier of the thread about this event */
6508 /* The remote state this event is associated with. When the remote
6509 connection, represented by a remote_state object, is closed,
6510 all the associated stop_reply events should be released. */
6511 struct remote_state
*rs
;
6513 struct target_waitstatus ws
;
6515 /* The architecture associated with the expedited registers. */
6518 /* Expedited registers. This makes remote debugging a bit more
6519 efficient for those targets that provide critical registers as
6520 part of their normal status mechanism (as another roundtrip to
6521 fetch them is avoided). */
6522 std::vector
<cached_reg_t
> regcache
;
6524 enum target_stop_reason stop_reason
;
6526 CORE_ADDR watch_data_address
;
6531 /* Class used to track the construction of a vCont packet in the
6532 outgoing packet buffer. This is used to send multiple vCont
6533 packets if we have more actions than would fit a single packet. */
6538 explicit vcont_builder (remote_target
*remote
)
6545 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6550 /* The remote target. */
6551 remote_target
*m_remote
;
6553 /* Pointer to the first action. P points here if no action has been
6555 char *m_first_action
;
6557 /* Where the next action will be appended. */
6560 /* The end of the buffer. Must never write past this. */
6564 /* Prepare the outgoing buffer for a new vCont packet. */
6567 vcont_builder::restart ()
6569 struct remote_state
*rs
= m_remote
->get_remote_state ();
6571 m_p
= rs
->buf
.data ();
6572 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6573 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6574 m_first_action
= m_p
;
6577 /* If the vCont packet being built has any action, send it to the
6581 vcont_builder::flush ()
6583 struct remote_state
*rs
;
6585 if (m_p
== m_first_action
)
6588 rs
= m_remote
->get_remote_state ();
6589 m_remote
->putpkt (rs
->buf
);
6590 m_remote
->getpkt (&rs
->buf
, 0);
6591 if (strcmp (rs
->buf
.data (), "OK") != 0)
6592 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6595 /* The largest action is range-stepping, with its two addresses. This
6596 is more than sufficient. If a new, bigger action is created, it'll
6597 quickly trigger a failed assertion in append_resumption (and we'll
6599 #define MAX_ACTION_SIZE 200
6601 /* Append a new vCont action in the outgoing packet being built. If
6602 the action doesn't fit the packet along with previous actions, push
6603 what we've got so far to the remote end and start over a new vCont
6604 packet (with the new action). */
6607 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6609 char buf
[MAX_ACTION_SIZE
+ 1];
6611 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6612 ptid
, step
, siggnal
);
6614 /* Check whether this new action would fit in the vCont packet along
6615 with previous actions. If not, send what we've got so far and
6616 start a new vCont packet. */
6617 size_t rsize
= endp
- buf
;
6618 if (rsize
> m_endp
- m_p
)
6623 /* Should now fit. */
6624 gdb_assert (rsize
<= m_endp
- m_p
);
6627 memcpy (m_p
, buf
, rsize
);
6632 /* to_commit_resume implementation. */
6635 remote_target::commit_resumed ()
6637 int any_process_wildcard
;
6638 int may_global_wildcard_vcont
;
6640 /* If connected in all-stop mode, we'd send the remote resume
6641 request directly from remote_resume. Likewise if
6642 reverse-debugging, as there are no defined vCont actions for
6643 reverse execution. */
6644 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6647 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6648 instead of resuming all threads of each process individually.
6649 However, if any thread of a process must remain halted, we can't
6650 send wildcard resumes and must send one action per thread.
6652 Care must be taken to not resume threads/processes the server
6653 side already told us are stopped, but the core doesn't know about
6654 yet, because the events are still in the vStopped notification
6657 #1 => vCont s:p1.1;c
6659 #3 <= %Stopped T05 p1.1
6664 #8 (infrun handles the stop for p1.1 and continues stepping)
6665 #9 => vCont s:p1.1;c
6667 The last vCont above would resume thread p1.2 by mistake, because
6668 the server has no idea that the event for p1.2 had not been
6671 The server side must similarly ignore resume actions for the
6672 thread that has a pending %Stopped notification (and any other
6673 threads with events pending), until GDB acks the notification
6674 with vStopped. Otherwise, e.g., the following case is
6677 #1 => g (or any other packet)
6679 #3 <= %Stopped T05 p1.2
6680 #4 => vCont s:p1.1;c
6683 Above, the server must not resume thread p1.2. GDB can't know
6684 that p1.2 stopped until it acks the %Stopped notification, and
6685 since from GDB's perspective all threads should be running, it
6688 Finally, special care must also be given to handling fork/vfork
6689 events. A (v)fork event actually tells us that two processes
6690 stopped -- the parent and the child. Until we follow the fork,
6691 we must not resume the child. Therefore, if we have a pending
6692 fork follow, we must not send a global wildcard resume action
6693 (vCont;c). We can still send process-wide wildcards though. */
6695 /* Start by assuming a global wildcard (vCont;c) is possible. */
6696 may_global_wildcard_vcont
= 1;
6698 /* And assume every process is individually wildcard-able too. */
6699 for (inferior
*inf
: all_non_exited_inferiors (this))
6701 remote_inferior
*priv
= get_remote_inferior (inf
);
6703 priv
->may_wildcard_vcont
= true;
6706 /* Check for any pending events (not reported or processed yet) and
6707 disable process and global wildcard resumes appropriately. */
6708 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6710 bool any_pending_vcont_resume
= false;
6712 for (thread_info
*tp
: all_non_exited_threads (this))
6714 remote_thread_info
*priv
= get_remote_thread_info (tp
);
6716 /* If a thread of a process is not meant to be resumed, then we
6717 can't wildcard that process. */
6718 if (priv
->get_resume_state () == resume_state::NOT_RESUMED
)
6720 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6722 /* And if we can't wildcard a process, we can't wildcard
6723 everything either. */
6724 may_global_wildcard_vcont
= 0;
6728 if (priv
->get_resume_state () == resume_state::RESUMED_PENDING_VCONT
)
6729 any_pending_vcont_resume
= true;
6731 /* If a thread is the parent of an unfollowed fork, then we
6732 can't do a global wildcard, as that would resume the fork
6734 if (is_pending_fork_parent_thread (tp
))
6735 may_global_wildcard_vcont
= 0;
6738 /* We didn't have any resumed thread pending a vCont resume, so nothing to
6740 if (!any_pending_vcont_resume
)
6743 /* Now let's build the vCont packet(s). Actions must be appended
6744 from narrower to wider scopes (thread -> process -> global). If
6745 we end up with too many actions for a single packet vcont_builder
6746 flushes the current vCont packet to the remote side and starts a
6748 struct vcont_builder
vcont_builder (this);
6750 /* Threads first. */
6751 for (thread_info
*tp
: all_non_exited_threads (this))
6753 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6755 /* If the thread was previously vCont-resumed, no need to send a specific
6756 action for it. If we didn't receive a resume request for it, don't
6757 send an action for it either. */
6758 if (remote_thr
->get_resume_state () != resume_state::RESUMED_PENDING_VCONT
)
6761 gdb_assert (!thread_is_in_step_over_chain (tp
));
6763 /* We should never be commit-resuming a thread that has a stop reply.
6764 Otherwise, we would end up reporting a stop event for a thread while
6765 it is running on the remote target. */
6766 remote_state
*rs
= get_remote_state ();
6767 for (const auto &stop_reply
: rs
->stop_reply_queue
)
6768 gdb_assert (stop_reply
->ptid
!= tp
->ptid
);
6770 const resumed_pending_vcont_info
&info
6771 = remote_thr
->resumed_pending_vcont_info ();
6773 /* Check if we need to send a specific action for this thread. If not,
6774 it will be included in a wildcard resume instead. */
6775 if (info
.step
|| info
.sig
!= GDB_SIGNAL_0
6776 || !get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6777 vcont_builder
.push_action (tp
->ptid
, info
.step
, info
.sig
);
6779 remote_thr
->set_resumed ();
6782 /* Now check whether we can send any process-wide wildcard. This is
6783 to avoid sending a global wildcard in the case nothing is
6784 supposed to be resumed. */
6785 any_process_wildcard
= 0;
6787 for (inferior
*inf
: all_non_exited_inferiors (this))
6789 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6791 any_process_wildcard
= 1;
6796 if (any_process_wildcard
)
6798 /* If all processes are wildcard-able, then send a single "c"
6799 action, otherwise, send an "all (-1) threads of process"
6800 continue action for each running process, if any. */
6801 if (may_global_wildcard_vcont
)
6803 vcont_builder
.push_action (minus_one_ptid
,
6804 false, GDB_SIGNAL_0
);
6808 for (inferior
*inf
: all_non_exited_inferiors (this))
6810 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6812 vcont_builder
.push_action (ptid_t (inf
->pid
),
6813 false, GDB_SIGNAL_0
);
6819 vcont_builder
.flush ();
6822 /* Implementation of target_has_pending_events. */
6825 remote_target::has_pending_events ()
6827 if (target_can_async_p ())
6829 remote_state
*rs
= get_remote_state ();
6831 if (async_event_handler_marked (rs
->remote_async_inferior_event_token
))
6834 /* Note that BUFCNT can be negative, indicating sticky
6836 if (rs
->remote_desc
->bufcnt
!= 0)
6844 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6845 thread, all threads of a remote process, or all threads of all
6849 remote_target::remote_stop_ns (ptid_t ptid
)
6851 struct remote_state
*rs
= get_remote_state ();
6852 char *p
= rs
->buf
.data ();
6853 char *endp
= p
+ get_remote_packet_size ();
6855 /* If any thread that needs to stop was resumed but pending a vCont
6856 resume, generate a phony stop_reply. However, first check
6857 whether the thread wasn't resumed with a signal. Generating a
6858 phony stop in that case would result in losing the signal. */
6859 bool needs_commit
= false;
6860 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6862 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6864 if (remote_thr
->get_resume_state ()
6865 == resume_state::RESUMED_PENDING_VCONT
)
6867 const resumed_pending_vcont_info
&info
6868 = remote_thr
->resumed_pending_vcont_info ();
6869 if (info
.sig
!= GDB_SIGNAL_0
)
6871 /* This signal must be forwarded to the inferior. We
6872 could commit-resume just this thread, but its simpler
6873 to just commit-resume everything. */
6874 needs_commit
= true;
6883 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6885 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6887 if (remote_thr
->get_resume_state ()
6888 == resume_state::RESUMED_PENDING_VCONT
)
6890 remote_debug_printf ("Enqueueing phony stop reply for thread pending "
6891 "vCont-resume (%d, %ld, %ld)", tp
->ptid
.pid(),
6892 tp
->ptid
.lwp (), tp
->ptid
.tid ());
6894 /* Check that the thread wasn't resumed with a signal.
6895 Generating a phony stop would result in losing the
6897 const resumed_pending_vcont_info
&info
6898 = remote_thr
->resumed_pending_vcont_info ();
6899 gdb_assert (info
.sig
== GDB_SIGNAL_0
);
6901 stop_reply
*sr
= new stop_reply ();
6902 sr
->ptid
= tp
->ptid
;
6904 sr
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
6905 sr
->ws
.value
.sig
= GDB_SIGNAL_0
;
6906 sr
->arch
= tp
->inf
->gdbarch
;
6907 sr
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6908 sr
->watch_data_address
= 0;
6910 this->push_stop_reply (sr
);
6912 /* Pretend that this thread was actually resumed on the
6913 remote target, then stopped. If we leave it in the
6914 RESUMED_PENDING_VCONT state and the commit_resumed
6915 method is called while the stop reply is still in the
6916 queue, we'll end up reporting a stop event to the core
6917 for that thread while it is running on the remote
6918 target... that would be bad. */
6919 remote_thr
->set_resumed ();
6923 /* FIXME: This supports_vCont_probed check is a workaround until
6924 packet_support is per-connection. */
6925 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6926 || !rs
->supports_vCont_probed
)
6927 remote_vcont_probe ();
6929 if (!rs
->supports_vCont
.t
)
6930 error (_("Remote server does not support stopping threads"));
6932 if (ptid
== minus_one_ptid
6933 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6934 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6939 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6942 /* All (-1) threads of process. */
6943 nptid
= ptid_t (ptid
.pid (), -1, 0);
6946 /* Small optimization: if we already have a stop reply for
6947 this thread, no use in telling the stub we want this
6949 if (peek_stop_reply (ptid
))
6955 write_ptid (p
, endp
, nptid
);
6958 /* In non-stop, we get an immediate OK reply. The stop reply will
6959 come in asynchronously by notification. */
6961 getpkt (&rs
->buf
, 0);
6962 if (strcmp (rs
->buf
.data (), "OK") != 0)
6963 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6967 /* All-stop version of target_interrupt. Sends a break or a ^C to
6968 interrupt the remote target. It is undefined which thread of which
6969 process reports the interrupt. */
6972 remote_target::remote_interrupt_as ()
6974 struct remote_state
*rs
= get_remote_state ();
6976 rs
->ctrlc_pending_p
= 1;
6978 /* If the inferior is stopped already, but the core didn't know
6979 about it yet, just ignore the request. The cached wait status
6980 will be collected in remote_wait. */
6981 if (rs
->cached_wait_status
)
6984 /* Send interrupt_sequence to remote target. */
6985 send_interrupt_sequence ();
6988 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6989 the remote target. It is undefined which thread of which process
6990 reports the interrupt. Throws an error if the packet is not
6991 supported by the server. */
6994 remote_target::remote_interrupt_ns ()
6996 struct remote_state
*rs
= get_remote_state ();
6997 char *p
= rs
->buf
.data ();
6998 char *endp
= p
+ get_remote_packet_size ();
7000 xsnprintf (p
, endp
- p
, "vCtrlC");
7002 /* In non-stop, we get an immediate OK reply. The stop reply will
7003 come in asynchronously by notification. */
7005 getpkt (&rs
->buf
, 0);
7007 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
7011 case PACKET_UNKNOWN
:
7012 error (_("No support for interrupting the remote target."));
7014 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
7018 /* Implement the to_stop function for the remote targets. */
7021 remote_target::stop (ptid_t ptid
)
7023 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7025 if (target_is_non_stop_p ())
7026 remote_stop_ns (ptid
);
7029 /* We don't currently have a way to transparently pause the
7030 remote target in all-stop mode. Interrupt it instead. */
7031 remote_interrupt_as ();
7035 /* Implement the to_interrupt function for the remote targets. */
7038 remote_target::interrupt ()
7040 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7042 if (target_is_non_stop_p ())
7043 remote_interrupt_ns ();
7045 remote_interrupt_as ();
7048 /* Implement the to_pass_ctrlc function for the remote targets. */
7051 remote_target::pass_ctrlc ()
7053 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7055 struct remote_state
*rs
= get_remote_state ();
7057 /* If we're starting up, we're not fully synced yet. Quit
7059 if (rs
->starting_up
)
7061 /* If ^C has already been sent once, offer to disconnect. */
7062 else if (rs
->ctrlc_pending_p
)
7065 target_interrupt ();
7068 /* Ask the user what to do when an interrupt is received. */
7071 remote_target::interrupt_query ()
7073 struct remote_state
*rs
= get_remote_state ();
7075 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
7077 if (query (_("The target is not responding to interrupt requests.\n"
7078 "Stop debugging it? ")))
7080 remote_unpush_target (this);
7081 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
7086 if (query (_("Interrupted while waiting for the program.\n"
7087 "Give up waiting? ")))
7092 /* Enable/disable target terminal ownership. Most targets can use
7093 terminal groups to control terminal ownership. Remote targets are
7094 different in that explicit transfer of ownership to/from GDB/target
7098 remote_target::terminal_inferior ()
7100 /* NOTE: At this point we could also register our selves as the
7101 recipient of all input. Any characters typed could then be
7102 passed on down to the target. */
7106 remote_target::terminal_ours ()
7111 remote_console_output (const char *msg
)
7115 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
7118 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
7122 gdb_stdtarg
->puts (tb
);
7124 gdb_stdtarg
->flush ();
7127 /* Return the length of the stop reply queue. */
7130 remote_target::stop_reply_queue_length ()
7132 remote_state
*rs
= get_remote_state ();
7133 return rs
->stop_reply_queue
.size ();
7137 remote_notif_stop_parse (remote_target
*remote
,
7138 struct notif_client
*self
, const char *buf
,
7139 struct notif_event
*event
)
7141 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
7145 remote_notif_stop_ack (remote_target
*remote
,
7146 struct notif_client
*self
, const char *buf
,
7147 struct notif_event
*event
)
7149 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
7152 putpkt (remote
, self
->ack_command
);
7154 /* Kind can be TARGET_WAITKIND_IGNORE if we have meanwhile discarded
7155 the notification. It was left in the queue because we need to
7156 acknowledge it and pull the rest of the notifications out. */
7157 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7158 remote
->push_stop_reply (stop_reply
);
7162 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
7163 struct notif_client
*self
)
7165 /* We can't get pending events in remote_notif_process for
7166 notification stop, and we have to do this in remote_wait_ns
7167 instead. If we fetch all queued events from stub, remote stub
7168 may exit and we have no chance to process them back in
7170 remote_state
*rs
= remote
->get_remote_state ();
7171 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7175 stop_reply::~stop_reply ()
7177 for (cached_reg_t
®
: regcache
)
7181 static notif_event_up
7182 remote_notif_stop_alloc_reply ()
7184 return notif_event_up (new struct stop_reply ());
7187 /* A client of notification Stop. */
7189 struct notif_client notif_client_stop
=
7193 remote_notif_stop_parse
,
7194 remote_notif_stop_ack
,
7195 remote_notif_stop_can_get_pending_events
,
7196 remote_notif_stop_alloc_reply
,
7200 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
7201 the pid of the process that owns the threads we want to check, or
7202 -1 if we want to check all threads. */
7205 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
7208 if (ws
->kind
== TARGET_WAITKIND_FORKED
7209 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
7211 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
7218 /* Return the thread's pending status used to determine whether the
7219 thread is a fork parent stopped at a fork event. */
7221 static struct target_waitstatus
*
7222 thread_pending_fork_status (struct thread_info
*thread
)
7224 if (thread
->suspend
.waitstatus_pending_p
)
7225 return &thread
->suspend
.waitstatus
;
7227 return &thread
->pending_follow
;
7230 /* Determine if THREAD is a pending fork parent thread. */
7233 is_pending_fork_parent_thread (struct thread_info
*thread
)
7235 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7238 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7241 /* If CONTEXT contains any fork child threads that have not been
7242 reported yet, remove them from the CONTEXT list. If such a
7243 thread exists it is because we are stopped at a fork catchpoint
7244 and have not yet called follow_fork, which will set up the
7245 host-side data structures for the new process. */
7248 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7251 struct notif_client
*notif
= ¬if_client_stop
;
7253 /* For any threads stopped at a fork event, remove the corresponding
7254 fork child threads from the CONTEXT list. */
7255 for (thread_info
*thread
: all_non_exited_threads (this))
7257 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7259 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7260 context
->remove_thread (ws
->value
.related_pid
);
7263 /* Check for any pending fork events (not reported or processed yet)
7264 in process PID and remove those fork child threads from the
7265 CONTEXT list as well. */
7266 remote_notif_get_pending_events (notif
);
7267 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7268 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7269 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7270 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7271 context
->remove_thread (event
->ws
.value
.related_pid
);
7274 /* Check whether any event pending in the vStopped queue would prevent
7275 a global or process wildcard vCont action. Clear
7276 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7277 and clear the event inferior's may_wildcard_vcont flag if we can't
7278 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7281 remote_target::check_pending_events_prevent_wildcard_vcont
7282 (int *may_global_wildcard
)
7284 struct notif_client
*notif
= ¬if_client_stop
;
7286 remote_notif_get_pending_events (notif
);
7287 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7289 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7290 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7293 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7294 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7295 *may_global_wildcard
= 0;
7297 /* This may be the first time we heard about this process.
7298 Regardless, we must not do a global wildcard resume, otherwise
7299 we'd resume this process too. */
7300 *may_global_wildcard
= 0;
7301 if (event
->ptid
!= null_ptid
)
7303 inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7305 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7310 /* Discard all pending stop replies of inferior INF. */
7313 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7315 struct stop_reply
*reply
;
7316 struct remote_state
*rs
= get_remote_state ();
7317 struct remote_notif_state
*rns
= rs
->notif_state
;
7319 /* This function can be notified when an inferior exists. When the
7320 target is not remote, the notification state is NULL. */
7321 if (rs
->remote_desc
== NULL
)
7324 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7326 /* Discard the in-flight notification. */
7327 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7329 /* Leave the notification pending, since the server expects that
7330 we acknowledge it with vStopped. But clear its contents, so
7331 that later on when we acknowledge it, we also discard it. */
7332 reply
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7335 fprintf_unfiltered (gdb_stdlog
,
7336 "discarded in-flight notification\n");
7339 /* Discard the stop replies we have already pulled with
7341 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7342 rs
->stop_reply_queue
.end (),
7343 [=] (const stop_reply_up
&event
)
7345 return event
->ptid
.pid () == inf
->pid
;
7347 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7350 /* Discard the stop replies for RS in stop_reply_queue. */
7353 remote_target::discard_pending_stop_replies_in_queue ()
7355 remote_state
*rs
= get_remote_state ();
7357 /* Discard the stop replies we have already pulled with
7359 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7360 rs
->stop_reply_queue
.end (),
7361 [=] (const stop_reply_up
&event
)
7363 return event
->rs
== rs
;
7365 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7368 /* Remove the first reply in 'stop_reply_queue' which matches
7372 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7374 remote_state
*rs
= get_remote_state ();
7376 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7377 rs
->stop_reply_queue
.end (),
7378 [=] (const stop_reply_up
&event
)
7380 return event
->ptid
.matches (ptid
);
7382 struct stop_reply
*result
;
7383 if (iter
== rs
->stop_reply_queue
.end ())
7387 result
= iter
->release ();
7388 rs
->stop_reply_queue
.erase (iter
);
7392 fprintf_unfiltered (gdb_stdlog
,
7393 "notif: discard queued event: 'Stop' in %s\n",
7394 target_pid_to_str (ptid
).c_str ());
7399 /* Look for a queued stop reply belonging to PTID. If one is found,
7400 remove it from the queue, and return it. Returns NULL if none is
7401 found. If there are still queued events left to process, tell the
7402 event loop to get back to target_wait soon. */
7405 remote_target::queued_stop_reply (ptid_t ptid
)
7407 remote_state
*rs
= get_remote_state ();
7408 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7410 if (!rs
->stop_reply_queue
.empty ())
7412 /* There's still at least an event left. */
7413 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7419 /* Push a fully parsed stop reply in the stop reply queue. Since we
7420 know that we now have at least one queued event left to pass to the
7421 core side, tell the event loop to get back to target_wait soon. */
7424 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7426 remote_state
*rs
= get_remote_state ();
7427 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7430 fprintf_unfiltered (gdb_stdlog
,
7431 "notif: push 'Stop' %s to queue %d\n",
7432 target_pid_to_str (new_event
->ptid
).c_str (),
7433 int (rs
->stop_reply_queue
.size ()));
7435 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7438 /* Returns true if we have a stop reply for PTID. */
7441 remote_target::peek_stop_reply (ptid_t ptid
)
7443 remote_state
*rs
= get_remote_state ();
7444 for (auto &event
: rs
->stop_reply_queue
)
7445 if (ptid
== event
->ptid
7446 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7451 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7452 starting with P and ending with PEND matches PREFIX. */
7455 strprefix (const char *p
, const char *pend
, const char *prefix
)
7457 for ( ; p
< pend
; p
++, prefix
++)
7460 return *prefix
== '\0';
7463 /* Parse the stop reply in BUF. Either the function succeeds, and the
7464 result is stored in EVENT, or throws an error. */
7467 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7469 remote_arch_state
*rsa
= NULL
;
7474 event
->ptid
= null_ptid
;
7475 event
->rs
= get_remote_state ();
7476 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7477 event
->ws
.value
.integer
= 0;
7478 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7479 event
->regcache
.clear ();
7484 case 'T': /* Status with PC, SP, FP, ... */
7485 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7486 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7488 n... = register number
7489 r... = register contents
7492 p
= &buf
[3]; /* after Txx */
7498 p1
= strchr (p
, ':');
7500 error (_("Malformed packet(a) (missing colon): %s\n\
7504 error (_("Malformed packet(a) (missing register number): %s\n\
7508 /* Some "registers" are actually extended stop information.
7509 Note if you're adding a new entry here: GDB 7.9 and
7510 earlier assume that all register "numbers" that start
7511 with an hex digit are real register numbers. Make sure
7512 the server only sends such a packet if it knows the
7513 client understands it. */
7515 if (strprefix (p
, p1
, "thread"))
7516 event
->ptid
= read_ptid (++p1
, &p
);
7517 else if (strprefix (p
, p1
, "syscall_entry"))
7521 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7522 p
= unpack_varlen_hex (++p1
, &sysno
);
7523 event
->ws
.value
.syscall_number
= (int) sysno
;
7525 else if (strprefix (p
, p1
, "syscall_return"))
7529 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7530 p
= unpack_varlen_hex (++p1
, &sysno
);
7531 event
->ws
.value
.syscall_number
= (int) sysno
;
7533 else if (strprefix (p
, p1
, "watch")
7534 || strprefix (p
, p1
, "rwatch")
7535 || strprefix (p
, p1
, "awatch"))
7537 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7538 p
= unpack_varlen_hex (++p1
, &addr
);
7539 event
->watch_data_address
= (CORE_ADDR
) addr
;
7541 else if (strprefix (p
, p1
, "swbreak"))
7543 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7545 /* Make sure the stub doesn't forget to indicate support
7547 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7548 error (_("Unexpected swbreak stop reason"));
7550 /* The value part is documented as "must be empty",
7551 though we ignore it, in case we ever decide to make
7552 use of it in a backward compatible way. */
7553 p
= strchrnul (p1
+ 1, ';');
7555 else if (strprefix (p
, p1
, "hwbreak"))
7557 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7559 /* Make sure the stub doesn't forget to indicate support
7561 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7562 error (_("Unexpected hwbreak stop reason"));
7565 p
= strchrnul (p1
+ 1, ';');
7567 else if (strprefix (p
, p1
, "library"))
7569 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7570 p
= strchrnul (p1
+ 1, ';');
7572 else if (strprefix (p
, p1
, "replaylog"))
7574 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7575 /* p1 will indicate "begin" or "end", but it makes
7576 no difference for now, so ignore it. */
7577 p
= strchrnul (p1
+ 1, ';');
7579 else if (strprefix (p
, p1
, "core"))
7583 p
= unpack_varlen_hex (++p1
, &c
);
7586 else if (strprefix (p
, p1
, "fork"))
7588 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7589 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7591 else if (strprefix (p
, p1
, "vfork"))
7593 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7594 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7596 else if (strprefix (p
, p1
, "vforkdone"))
7598 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7599 p
= strchrnul (p1
+ 1, ';');
7601 else if (strprefix (p
, p1
, "exec"))
7606 /* Determine the length of the execd pathname. */
7607 p
= unpack_varlen_hex (++p1
, &ignored
);
7608 pathlen
= (p
- p1
) / 2;
7610 /* Save the pathname for event reporting and for
7611 the next run command. */
7612 gdb::unique_xmalloc_ptr
<char[]> pathname
7613 ((char *) xmalloc (pathlen
+ 1));
7614 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7615 pathname
[pathlen
] = '\0';
7617 /* This is freed during event handling. */
7618 event
->ws
.value
.execd_pathname
= pathname
.release ();
7619 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7621 /* Skip the registers included in this packet, since
7622 they may be for an architecture different from the
7623 one used by the original program. */
7626 else if (strprefix (p
, p1
, "create"))
7628 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7629 p
= strchrnul (p1
+ 1, ';');
7638 p
= strchrnul (p1
+ 1, ';');
7643 /* Maybe a real ``P'' register number. */
7644 p_temp
= unpack_varlen_hex (p
, &pnum
);
7645 /* If the first invalid character is the colon, we got a
7646 register number. Otherwise, it's an unknown stop
7650 /* If we haven't parsed the event's thread yet, find
7651 it now, in order to find the architecture of the
7652 reported expedited registers. */
7653 if (event
->ptid
== null_ptid
)
7655 /* If there is no thread-id information then leave
7656 the event->ptid as null_ptid. Later in
7657 process_stop_reply we will pick a suitable
7659 const char *thr
= strstr (p1
+ 1, ";thread:");
7661 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7668 = (event
->ptid
== null_ptid
7670 : find_inferior_ptid (this, event
->ptid
));
7671 /* If this is the first time we learn anything
7672 about this process, skip the registers
7673 included in this packet, since we don't yet
7674 know which architecture to use to parse them.
7675 We'll determine the architecture later when
7676 we process the stop reply and retrieve the
7677 target description, via
7678 remote_notice_new_inferior ->
7679 post_create_inferior. */
7682 p
= strchrnul (p1
+ 1, ';');
7687 event
->arch
= inf
->gdbarch
;
7688 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7692 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7693 cached_reg_t cached_reg
;
7696 error (_("Remote sent bad register number %s: %s\n\
7698 hex_string (pnum
), p
, buf
);
7700 cached_reg
.num
= reg
->regnum
;
7701 cached_reg
.data
= (gdb_byte
*)
7702 xmalloc (register_size (event
->arch
, reg
->regnum
));
7705 fieldsize
= hex2bin (p
, cached_reg
.data
,
7706 register_size (event
->arch
, reg
->regnum
));
7708 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7709 warning (_("Remote reply is too short: %s"), buf
);
7711 event
->regcache
.push_back (cached_reg
);
7715 /* Not a number. Silently skip unknown optional
7717 p
= strchrnul (p1
+ 1, ';');
7722 error (_("Remote register badly formatted: %s\nhere: %s"),
7727 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7731 case 'S': /* Old style status, just signal only. */
7735 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7736 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7737 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7738 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7740 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7743 case 'w': /* Thread exited. */
7747 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7748 p
= unpack_varlen_hex (&buf
[1], &value
);
7749 event
->ws
.value
.integer
= value
;
7751 error (_("stop reply packet badly formatted: %s"), buf
);
7752 event
->ptid
= read_ptid (++p
, NULL
);
7755 case 'W': /* Target exited. */
7760 /* GDB used to accept only 2 hex chars here. Stubs should
7761 only send more if they detect GDB supports multi-process
7763 p
= unpack_varlen_hex (&buf
[1], &value
);
7767 /* The remote process exited. */
7768 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7769 event
->ws
.value
.integer
= value
;
7773 /* The remote process exited with a signal. */
7774 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7775 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7776 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7778 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7781 /* If no process is specified, return null_ptid, and let the
7782 caller figure out the right process to use. */
7792 else if (startswith (p
, "process:"))
7796 p
+= sizeof ("process:") - 1;
7797 unpack_varlen_hex (p
, &upid
);
7801 error (_("unknown stop reply packet: %s"), buf
);
7804 error (_("unknown stop reply packet: %s"), buf
);
7805 event
->ptid
= ptid_t (pid
);
7809 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7810 event
->ptid
= minus_one_ptid
;
7815 /* When the stub wants to tell GDB about a new notification reply, it
7816 sends a notification (%Stop, for example). Those can come it at
7817 any time, hence, we have to make sure that any pending
7818 putpkt/getpkt sequence we're making is finished, before querying
7819 the stub for more events with the corresponding ack command
7820 (vStopped, for example). E.g., if we started a vStopped sequence
7821 immediately upon receiving the notification, something like this
7829 1.6) <-- (registers reply to step #1.3)
7831 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7834 To solve this, whenever we parse a %Stop notification successfully,
7835 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7836 doing whatever we were doing:
7842 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7843 2.5) <-- (registers reply to step #2.3)
7845 Eventually after step #2.5, we return to the event loop, which
7846 notices there's an event on the
7847 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7848 associated callback --- the function below. At this point, we're
7849 always safe to start a vStopped sequence. :
7852 2.7) <-- T05 thread:2
7858 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7860 struct remote_state
*rs
= get_remote_state ();
7862 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7865 fprintf_unfiltered (gdb_stdlog
,
7866 "notif: process: '%s' ack pending event\n",
7870 nc
->ack (this, nc
, rs
->buf
.data (),
7871 rs
->notif_state
->pending_event
[nc
->id
]);
7872 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7876 getpkt (&rs
->buf
, 0);
7877 if (strcmp (rs
->buf
.data (), "OK") == 0)
7880 remote_notif_ack (this, nc
, rs
->buf
.data ());
7886 fprintf_unfiltered (gdb_stdlog
,
7887 "notif: process: '%s' no pending reply\n",
7892 /* Wrapper around remote_target::remote_notif_get_pending_events to
7893 avoid having to export the whole remote_target class. */
7896 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7898 remote
->remote_notif_get_pending_events (nc
);
7901 /* Called from process_stop_reply when the stop packet we are responding
7902 to didn't include a process-id or thread-id. STATUS is the stop event
7903 we are responding to.
7905 It is the task of this function to select a suitable thread (or process)
7906 and return its ptid, this is the thread (or process) we will assume the
7907 stop event came from.
7909 In some cases there isn't really any choice about which thread (or
7910 process) is selected, a basic remote with a single process containing a
7911 single thread might choose not to send any process-id or thread-id in
7912 its stop packets, this function will select and return the one and only
7915 However, if a target supports multiple threads (or processes) and still
7916 doesn't include a thread-id (or process-id) in its stop packet then
7917 first, this is a badly behaving target, and second, we're going to have
7918 to select a thread (or process) at random and use that. This function
7919 will print a warning to the user if it detects that there is the
7920 possibility that GDB is guessing which thread (or process) to
7923 Note that this is called before GDB fetches the updated thread list from the
7924 target. So it's possible for the stop reply to be ambiguous and for GDB to
7925 not realize it. For example, if there's initially one thread, the target
7926 spawns a second thread, and then sends a stop reply without an id that
7927 concerns the first thread. GDB will assume the stop reply is about the
7928 first thread - the only thread it knows about - without printing a warning.
7929 Anyway, if the remote meant for the stop reply to be about the second thread,
7930 then it would be really broken, because GDB doesn't know about that thread
7934 remote_target::select_thread_for_ambiguous_stop_reply
7935 (const struct target_waitstatus
*status
)
7937 /* Some stop events apply to all threads in an inferior, while others
7938 only apply to a single thread. */
7939 bool process_wide_stop
7940 = (status
->kind
== TARGET_WAITKIND_EXITED
7941 || status
->kind
== TARGET_WAITKIND_SIGNALLED
);
7943 thread_info
*first_resumed_thread
= nullptr;
7944 bool ambiguous
= false;
7946 /* Consider all non-exited threads of the target, find the first resumed
7948 for (thread_info
*thr
: all_non_exited_threads (this))
7950 remote_thread_info
*remote_thr
= get_remote_thread_info (thr
);
7952 if (remote_thr
->get_resume_state () != resume_state::RESUMED
)
7955 if (first_resumed_thread
== nullptr)
7956 first_resumed_thread
= thr
;
7957 else if (!process_wide_stop
7958 || first_resumed_thread
->ptid
.pid () != thr
->ptid
.pid ())
7962 gdb_assert (first_resumed_thread
!= nullptr);
7964 /* Warn if the remote target is sending ambiguous stop replies. */
7967 static bool warned
= false;
7971 /* If you are seeing this warning then the remote target has
7972 stopped without specifying a thread-id, but the target
7973 does have multiple threads (or inferiors), and so GDB is
7974 having to guess which thread stopped.
7976 Examples of what might cause this are the target sending
7977 and 'S' stop packet, or a 'T' stop packet and not
7978 including a thread-id.
7980 Additionally, the target might send a 'W' or 'X packet
7981 without including a process-id, when the target has
7982 multiple running inferiors. */
7983 if (process_wide_stop
)
7984 warning (_("multi-inferior target stopped without "
7985 "sending a process-id, using first "
7986 "non-exited inferior"));
7988 warning (_("multi-threaded target stopped without "
7989 "sending a thread-id, using first "
7990 "non-exited thread"));
7995 /* If this is a stop for all threads then don't use a particular threads
7996 ptid, instead create a new ptid where only the pid field is set. */
7997 if (process_wide_stop
)
7998 return ptid_t (first_resumed_thread
->ptid
.pid ());
8000 return first_resumed_thread
->ptid
;
8003 /* Called when it is decided that STOP_REPLY holds the info of the
8004 event that is to be returned to the core. This function always
8005 destroys STOP_REPLY. */
8008 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
8009 struct target_waitstatus
*status
)
8011 *status
= stop_reply
->ws
;
8012 ptid_t ptid
= stop_reply
->ptid
;
8014 /* If no thread/process was reported by the stub then select a suitable
8016 if (ptid
== null_ptid
)
8017 ptid
= select_thread_for_ambiguous_stop_reply (status
);
8018 gdb_assert (ptid
!= null_ptid
);
8020 if (status
->kind
!= TARGET_WAITKIND_EXITED
8021 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
8022 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
8024 /* Expedited registers. */
8025 if (!stop_reply
->regcache
.empty ())
8027 struct regcache
*regcache
8028 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
8030 for (cached_reg_t
®
: stop_reply
->regcache
)
8032 regcache
->raw_supply (reg
.num
, reg
.data
);
8036 stop_reply
->regcache
.clear ();
8039 remote_notice_new_inferior (ptid
, 0);
8040 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
8041 remote_thr
->core
= stop_reply
->core
;
8042 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
8043 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
8045 if (target_is_non_stop_p ())
8047 /* If the target works in non-stop mode, a stop-reply indicates that
8048 only this thread stopped. */
8049 remote_thr
->set_not_resumed ();
8053 /* If the target works in all-stop mode, a stop-reply indicates that
8054 all the target's threads stopped. */
8055 for (thread_info
*tp
: all_non_exited_threads (this))
8056 get_remote_thread_info (tp
)->set_not_resumed ();
8064 /* The non-stop mode version of target_wait. */
8067 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
8068 target_wait_flags options
)
8070 struct remote_state
*rs
= get_remote_state ();
8071 struct stop_reply
*stop_reply
;
8075 /* If in non-stop mode, get out of getpkt even if a
8076 notification is received. */
8078 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
8081 if (ret
!= -1 && !is_notif
)
8084 case 'E': /* Error of some sort. */
8085 /* We're out of sync with the target now. Did it continue
8086 or not? We can't tell which thread it was in non-stop,
8087 so just ignore this. */
8088 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
8090 case 'O': /* Console output. */
8091 remote_console_output (&rs
->buf
[1]);
8094 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
8098 /* Acknowledge a pending stop reply that may have arrived in the
8100 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
8101 remote_notif_get_pending_events (¬if_client_stop
);
8103 /* If indeed we noticed a stop reply, we're done. */
8104 stop_reply
= queued_stop_reply (ptid
);
8105 if (stop_reply
!= NULL
)
8106 return process_stop_reply (stop_reply
, status
);
8108 /* Still no event. If we're just polling for an event, then
8109 return to the event loop. */
8110 if (options
& TARGET_WNOHANG
)
8112 status
->kind
= TARGET_WAITKIND_IGNORE
;
8113 return minus_one_ptid
;
8116 /* Otherwise do a blocking wait. */
8117 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
8121 /* Return the first resumed thread. */
8124 first_remote_resumed_thread (remote_target
*target
)
8126 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
8132 /* Wait until the remote machine stops, then return, storing status in
8133 STATUS just as `wait' would. */
8136 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
,
8137 target_wait_flags options
)
8139 struct remote_state
*rs
= get_remote_state ();
8140 ptid_t event_ptid
= null_ptid
;
8142 struct stop_reply
*stop_reply
;
8146 status
->kind
= TARGET_WAITKIND_IGNORE
;
8147 status
->value
.integer
= 0;
8149 stop_reply
= queued_stop_reply (ptid
);
8150 if (stop_reply
!= NULL
)
8151 return process_stop_reply (stop_reply
, status
);
8153 if (rs
->cached_wait_status
)
8154 /* Use the cached wait status, but only once. */
8155 rs
->cached_wait_status
= 0;
8160 int forever
= ((options
& TARGET_WNOHANG
) == 0
8161 && rs
->wait_forever_enabled_p
);
8163 if (!rs
->waiting_for_stop_reply
)
8165 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
8166 return minus_one_ptid
;
8169 /* FIXME: cagney/1999-09-27: If we're in async mode we should
8170 _never_ wait for ever -> test on target_is_async_p().
8171 However, before we do that we need to ensure that the caller
8172 knows how to take the target into/out of async mode. */
8173 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
8175 /* GDB gets a notification. Return to core as this event is
8177 if (ret
!= -1 && is_notif
)
8178 return minus_one_ptid
;
8180 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
8181 return minus_one_ptid
;
8184 buf
= rs
->buf
.data ();
8186 /* Assume that the target has acknowledged Ctrl-C unless we receive
8187 an 'F' or 'O' packet. */
8188 if (buf
[0] != 'F' && buf
[0] != 'O')
8189 rs
->ctrlc_pending_p
= 0;
8193 case 'E': /* Error of some sort. */
8194 /* We're out of sync with the target now. Did it continue or
8195 not? Not is more likely, so report a stop. */
8196 rs
->waiting_for_stop_reply
= 0;
8198 warning (_("Remote failure reply: %s"), buf
);
8199 status
->kind
= TARGET_WAITKIND_STOPPED
;
8200 status
->value
.sig
= GDB_SIGNAL_0
;
8202 case 'F': /* File-I/O request. */
8203 /* GDB may access the inferior memory while handling the File-I/O
8204 request, but we don't want GDB accessing memory while waiting
8205 for a stop reply. See the comments in putpkt_binary. Set
8206 waiting_for_stop_reply to 0 temporarily. */
8207 rs
->waiting_for_stop_reply
= 0;
8208 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
8209 rs
->ctrlc_pending_p
= 0;
8210 /* GDB handled the File-I/O request, and the target is running
8211 again. Keep waiting for events. */
8212 rs
->waiting_for_stop_reply
= 1;
8214 case 'N': case 'T': case 'S': case 'X': case 'W':
8216 /* There is a stop reply to handle. */
8217 rs
->waiting_for_stop_reply
= 0;
8220 = (struct stop_reply
*) remote_notif_parse (this,
8224 event_ptid
= process_stop_reply (stop_reply
, status
);
8227 case 'O': /* Console output. */
8228 remote_console_output (buf
+ 1);
8231 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
8233 /* Zero length reply means that we tried 'S' or 'C' and the
8234 remote system doesn't support it. */
8235 target_terminal::ours_for_output ();
8237 ("Can't send signals to this remote system. %s not sent.\n",
8238 gdb_signal_to_name (rs
->last_sent_signal
));
8239 rs
->last_sent_signal
= GDB_SIGNAL_0
;
8240 target_terminal::inferior ();
8242 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
8248 warning (_("Invalid remote reply: %s"), buf
);
8252 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
8253 return minus_one_ptid
;
8254 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
8256 /* Nothing interesting happened. If we're doing a non-blocking
8257 poll, we're done. Otherwise, go back to waiting. */
8258 if (options
& TARGET_WNOHANG
)
8259 return minus_one_ptid
;
8263 else if (status
->kind
!= TARGET_WAITKIND_EXITED
8264 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
8266 if (event_ptid
!= null_ptid
)
8267 record_currthread (rs
, event_ptid
);
8269 event_ptid
= first_remote_resumed_thread (this);
8273 /* A process exit. Invalidate our notion of current thread. */
8274 record_currthread (rs
, minus_one_ptid
);
8275 /* It's possible that the packet did not include a pid. */
8276 if (event_ptid
== null_ptid
)
8277 event_ptid
= first_remote_resumed_thread (this);
8278 /* EVENT_PTID could still be NULL_PTID. Double-check. */
8279 if (event_ptid
== null_ptid
)
8280 event_ptid
= magic_null_ptid
;
8286 /* Wait until the remote machine stops, then return, storing status in
8287 STATUS just as `wait' would. */
8290 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
,
8291 target_wait_flags options
)
8293 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
8295 remote_state
*rs
= get_remote_state ();
8297 /* Start by clearing the flag that asks for our wait method to be called,
8298 we'll mark it again at the end if needed. */
8299 if (target_is_async_p ())
8300 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
8304 if (target_is_non_stop_p ())
8305 event_ptid
= wait_ns (ptid
, status
, options
);
8307 event_ptid
= wait_as (ptid
, status
, options
);
8309 if (target_is_async_p ())
8311 /* If there are events left in the queue, or unacknowledged
8312 notifications, then tell the event loop to call us again. */
8313 if (!rs
->stop_reply_queue
.empty ()
8314 || rs
->notif_state
->pending_event
[notif_client_stop
.id
] != nullptr)
8315 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
8321 /* Fetch a single register using a 'p' packet. */
8324 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8327 struct gdbarch
*gdbarch
= regcache
->arch ();
8328 struct remote_state
*rs
= get_remote_state ();
8330 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8333 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8336 if (reg
->pnum
== -1)
8339 p
= rs
->buf
.data ();
8341 p
+= hexnumstr (p
, reg
->pnum
);
8344 getpkt (&rs
->buf
, 0);
8346 buf
= rs
->buf
.data ();
8348 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8352 case PACKET_UNKNOWN
:
8355 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8356 gdbarch_register_name (regcache
->arch (),
8361 /* If this register is unfetchable, tell the regcache. */
8364 regcache
->raw_supply (reg
->regnum
, NULL
);
8368 /* Otherwise, parse and supply the value. */
8374 error (_("fetch_register_using_p: early buf termination"));
8376 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8379 regcache
->raw_supply (reg
->regnum
, regp
);
8383 /* Fetch the registers included in the target's 'g' packet. */
8386 remote_target::send_g_packet ()
8388 struct remote_state
*rs
= get_remote_state ();
8391 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8393 getpkt (&rs
->buf
, 0);
8394 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8395 error (_("Could not read registers; remote failure reply '%s'"),
8398 /* We can get out of synch in various cases. If the first character
8399 in the buffer is not a hex character, assume that has happened
8400 and try to fetch another packet to read. */
8401 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8402 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8403 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8404 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8406 remote_debug_printf ("Bad register packet; fetching a new packet");
8407 getpkt (&rs
->buf
, 0);
8410 buf_len
= strlen (rs
->buf
.data ());
8412 /* Sanity check the received packet. */
8413 if (buf_len
% 2 != 0)
8414 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8420 remote_target::process_g_packet (struct regcache
*regcache
)
8422 struct gdbarch
*gdbarch
= regcache
->arch ();
8423 struct remote_state
*rs
= get_remote_state ();
8424 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8429 buf_len
= strlen (rs
->buf
.data ());
8431 /* Further sanity checks, with knowledge of the architecture. */
8432 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8433 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8435 rsa
->sizeof_g_packet
, buf_len
/ 2,
8438 /* Save the size of the packet sent to us by the target. It is used
8439 as a heuristic when determining the max size of packets that the
8440 target can safely receive. */
8441 if (rsa
->actual_register_packet_size
== 0)
8442 rsa
->actual_register_packet_size
= buf_len
;
8444 /* If this is smaller than we guessed the 'g' packet would be,
8445 update our records. A 'g' reply that doesn't include a register's
8446 value implies either that the register is not available, or that
8447 the 'p' packet must be used. */
8448 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8450 long sizeof_g_packet
= buf_len
/ 2;
8452 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8454 long offset
= rsa
->regs
[i
].offset
;
8455 long reg_size
= register_size (gdbarch
, i
);
8457 if (rsa
->regs
[i
].pnum
== -1)
8460 if (offset
>= sizeof_g_packet
)
8461 rsa
->regs
[i
].in_g_packet
= 0;
8462 else if (offset
+ reg_size
> sizeof_g_packet
)
8463 error (_("Truncated register %d in remote 'g' packet"), i
);
8465 rsa
->regs
[i
].in_g_packet
= 1;
8468 /* Looks valid enough, we can assume this is the correct length
8469 for a 'g' packet. It's important not to adjust
8470 rsa->sizeof_g_packet if we have truncated registers otherwise
8471 this "if" won't be run the next time the method is called
8472 with a packet of the same size and one of the internal errors
8473 below will trigger instead. */
8474 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8477 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8479 /* Unimplemented registers read as all bits zero. */
8480 memset (regs
, 0, rsa
->sizeof_g_packet
);
8482 /* Reply describes registers byte by byte, each byte encoded as two
8483 hex characters. Suck them all up, then supply them to the
8484 register cacheing/storage mechanism. */
8486 p
= rs
->buf
.data ();
8487 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8489 if (p
[0] == 0 || p
[1] == 0)
8490 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8491 internal_error (__FILE__
, __LINE__
,
8492 _("unexpected end of 'g' packet reply"));
8494 if (p
[0] == 'x' && p
[1] == 'x')
8495 regs
[i
] = 0; /* 'x' */
8497 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8501 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8503 struct packet_reg
*r
= &rsa
->regs
[i
];
8504 long reg_size
= register_size (gdbarch
, i
);
8508 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8509 /* This shouldn't happen - we adjusted in_g_packet above. */
8510 internal_error (__FILE__
, __LINE__
,
8511 _("unexpected end of 'g' packet reply"));
8512 else if (rs
->buf
[r
->offset
* 2] == 'x')
8514 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8515 /* The register isn't available, mark it as such (at
8516 the same time setting the value to zero). */
8517 regcache
->raw_supply (r
->regnum
, NULL
);
8520 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8526 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8529 process_g_packet (regcache
);
8532 /* Make the remote selected traceframe match GDB's selected
8536 remote_target::set_remote_traceframe ()
8539 struct remote_state
*rs
= get_remote_state ();
8541 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8544 /* Avoid recursion, remote_trace_find calls us again. */
8545 rs
->remote_traceframe_number
= get_traceframe_number ();
8547 newnum
= target_trace_find (tfind_number
,
8548 get_traceframe_number (), 0, 0, NULL
);
8550 /* Should not happen. If it does, all bets are off. */
8551 if (newnum
!= get_traceframe_number ())
8552 warning (_("could not set remote traceframe"));
8556 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8558 struct gdbarch
*gdbarch
= regcache
->arch ();
8559 struct remote_state
*rs
= get_remote_state ();
8560 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8563 set_remote_traceframe ();
8564 set_general_thread (regcache
->ptid ());
8568 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8570 gdb_assert (reg
!= NULL
);
8572 /* If this register might be in the 'g' packet, try that first -
8573 we are likely to read more than one register. If this is the
8574 first 'g' packet, we might be overly optimistic about its
8575 contents, so fall back to 'p'. */
8576 if (reg
->in_g_packet
)
8578 fetch_registers_using_g (regcache
);
8579 if (reg
->in_g_packet
)
8583 if (fetch_register_using_p (regcache
, reg
))
8586 /* This register is not available. */
8587 regcache
->raw_supply (reg
->regnum
, NULL
);
8592 fetch_registers_using_g (regcache
);
8594 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8595 if (!rsa
->regs
[i
].in_g_packet
)
8596 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8598 /* This register is not available. */
8599 regcache
->raw_supply (i
, NULL
);
8603 /* Prepare to store registers. Since we may send them all (using a
8604 'G' request), we have to read out the ones we don't want to change
8608 remote_target::prepare_to_store (struct regcache
*regcache
)
8610 struct remote_state
*rs
= get_remote_state ();
8611 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8614 /* Make sure the entire registers array is valid. */
8615 switch (packet_support (PACKET_P
))
8617 case PACKET_DISABLE
:
8618 case PACKET_SUPPORT_UNKNOWN
:
8619 /* Make sure all the necessary registers are cached. */
8620 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8621 if (rsa
->regs
[i
].in_g_packet
)
8622 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8629 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8630 packet was not recognized. */
8633 remote_target::store_register_using_P (const struct regcache
*regcache
,
8636 struct gdbarch
*gdbarch
= regcache
->arch ();
8637 struct remote_state
*rs
= get_remote_state ();
8638 /* Try storing a single register. */
8639 char *buf
= rs
->buf
.data ();
8640 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8643 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8646 if (reg
->pnum
== -1)
8649 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8650 p
= buf
+ strlen (buf
);
8651 regcache
->raw_collect (reg
->regnum
, regp
);
8652 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8654 getpkt (&rs
->buf
, 0);
8656 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8661 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8662 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8663 case PACKET_UNKNOWN
:
8666 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8670 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8671 contents of the register cache buffer. FIXME: ignores errors. */
8674 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8676 struct remote_state
*rs
= get_remote_state ();
8677 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8681 /* Extract all the registers in the regcache copying them into a
8686 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8687 memset (regs
, 0, rsa
->sizeof_g_packet
);
8688 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8690 struct packet_reg
*r
= &rsa
->regs
[i
];
8693 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8697 /* Command describes registers byte by byte,
8698 each byte encoded as two hex characters. */
8699 p
= rs
->buf
.data ();
8701 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8703 getpkt (&rs
->buf
, 0);
8704 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8705 error (_("Could not write registers; remote failure reply '%s'"),
8709 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8710 of the register cache buffer. FIXME: ignores errors. */
8713 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8715 struct gdbarch
*gdbarch
= regcache
->arch ();
8716 struct remote_state
*rs
= get_remote_state ();
8717 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8720 set_remote_traceframe ();
8721 set_general_thread (regcache
->ptid ());
8725 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8727 gdb_assert (reg
!= NULL
);
8729 /* Always prefer to store registers using the 'P' packet if
8730 possible; we often change only a small number of registers.
8731 Sometimes we change a larger number; we'd need help from a
8732 higher layer to know to use 'G'. */
8733 if (store_register_using_P (regcache
, reg
))
8736 /* For now, don't complain if we have no way to write the
8737 register. GDB loses track of unavailable registers too
8738 easily. Some day, this may be an error. We don't have
8739 any way to read the register, either... */
8740 if (!reg
->in_g_packet
)
8743 store_registers_using_G (regcache
);
8747 store_registers_using_G (regcache
);
8749 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8750 if (!rsa
->regs
[i
].in_g_packet
)
8751 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8752 /* See above for why we do not issue an error here. */
8757 /* Return the number of hex digits in num. */
8760 hexnumlen (ULONGEST num
)
8764 for (i
= 0; num
!= 0; i
++)
8767 return std::max (i
, 1);
8770 /* Set BUF to the minimum number of hex digits representing NUM. */
8773 hexnumstr (char *buf
, ULONGEST num
)
8775 int len
= hexnumlen (num
);
8777 return hexnumnstr (buf
, num
, len
);
8781 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8784 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8790 for (i
= width
- 1; i
>= 0; i
--)
8792 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8799 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8802 remote_address_masked (CORE_ADDR addr
)
8804 unsigned int address_size
= remote_address_size
;
8806 /* If "remoteaddresssize" was not set, default to target address size. */
8808 address_size
= gdbarch_addr_bit (target_gdbarch ());
8810 if (address_size
> 0
8811 && address_size
< (sizeof (ULONGEST
) * 8))
8813 /* Only create a mask when that mask can safely be constructed
8814 in a ULONGEST variable. */
8817 mask
= (mask
<< address_size
) - 1;
8823 /* Determine whether the remote target supports binary downloading.
8824 This is accomplished by sending a no-op memory write of zero length
8825 to the target at the specified address. It does not suffice to send
8826 the whole packet, since many stubs strip the eighth bit and
8827 subsequently compute a wrong checksum, which causes real havoc with
8830 NOTE: This can still lose if the serial line is not eight-bit
8831 clean. In cases like this, the user should clear "remote
8835 remote_target::check_binary_download (CORE_ADDR addr
)
8837 struct remote_state
*rs
= get_remote_state ();
8839 switch (packet_support (PACKET_X
))
8841 case PACKET_DISABLE
:
8845 case PACKET_SUPPORT_UNKNOWN
:
8849 p
= rs
->buf
.data ();
8851 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8853 p
+= hexnumstr (p
, (ULONGEST
) 0);
8857 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8858 getpkt (&rs
->buf
, 0);
8860 if (rs
->buf
[0] == '\0')
8862 remote_debug_printf ("binary downloading NOT supported by target");
8863 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8867 remote_debug_printf ("binary downloading supported by target");
8868 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8875 /* Helper function to resize the payload in order to try to get a good
8876 alignment. We try to write an amount of data such that the next write will
8877 start on an address aligned on REMOTE_ALIGN_WRITES. */
8880 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8882 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8885 /* Write memory data directly to the remote machine.
8886 This does not inform the data cache; the data cache uses this.
8887 HEADER is the starting part of the packet.
8888 MEMADDR is the address in the remote memory space.
8889 MYADDR is the address of the buffer in our space.
8890 LEN_UNITS is the number of addressable units to write.
8891 UNIT_SIZE is the length in bytes of an addressable unit.
8892 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8893 should send data as binary ('X'), or hex-encoded ('M').
8895 The function creates packet of the form
8896 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8898 where encoding of <DATA> is terminated by PACKET_FORMAT.
8900 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8903 Return the transferred status, error or OK (an
8904 'enum target_xfer_status' value). Save the number of addressable units
8905 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8907 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8908 exchange between gdb and the stub could look like (?? in place of the
8914 -> $M1000,3:eeeeffffeeee#??
8918 <- eeeeffffeeeedddd */
8921 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8922 const gdb_byte
*myaddr
,
8925 ULONGEST
*xfered_len_units
,
8926 char packet_format
, int use_length
)
8928 struct remote_state
*rs
= get_remote_state ();
8934 int payload_capacity_bytes
;
8935 int payload_length_bytes
;
8937 if (packet_format
!= 'X' && packet_format
!= 'M')
8938 internal_error (__FILE__
, __LINE__
,
8939 _("remote_write_bytes_aux: bad packet format"));
8942 return TARGET_XFER_EOF
;
8944 payload_capacity_bytes
= get_memory_write_packet_size ();
8946 /* The packet buffer will be large enough for the payload;
8947 get_memory_packet_size ensures this. */
8950 /* Compute the size of the actual payload by subtracting out the
8951 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8953 payload_capacity_bytes
-= strlen ("$,:#NN");
8955 /* The comma won't be used. */
8956 payload_capacity_bytes
+= 1;
8957 payload_capacity_bytes
-= strlen (header
);
8958 payload_capacity_bytes
-= hexnumlen (memaddr
);
8960 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8962 strcat (rs
->buf
.data (), header
);
8963 p
= rs
->buf
.data () + strlen (header
);
8965 /* Compute a best guess of the number of bytes actually transfered. */
8966 if (packet_format
== 'X')
8968 /* Best guess at number of bytes that will fit. */
8969 todo_units
= std::min (len_units
,
8970 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8972 payload_capacity_bytes
-= hexnumlen (todo_units
);
8973 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8977 /* Number of bytes that will fit. */
8979 = std::min (len_units
,
8980 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8982 payload_capacity_bytes
-= hexnumlen (todo_units
);
8983 todo_units
= std::min (todo_units
,
8984 (payload_capacity_bytes
/ unit_size
) / 2);
8987 if (todo_units
<= 0)
8988 internal_error (__FILE__
, __LINE__
,
8989 _("minimum packet size too small to write data"));
8991 /* If we already need another packet, then try to align the end
8992 of this packet to a useful boundary. */
8993 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8994 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8996 /* Append "<memaddr>". */
8997 memaddr
= remote_address_masked (memaddr
);
8998 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9005 /* Append the length and retain its location and size. It may need to be
9006 adjusted once the packet body has been created. */
9008 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
9016 /* Append the packet body. */
9017 if (packet_format
== 'X')
9019 /* Binary mode. Send target system values byte by byte, in
9020 increasing byte addresses. Only escape certain critical
9022 payload_length_bytes
=
9023 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
9024 &units_written
, payload_capacity_bytes
);
9026 /* If not all TODO units fit, then we'll need another packet. Make
9027 a second try to keep the end of the packet aligned. Don't do
9028 this if the packet is tiny. */
9029 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
9033 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
9035 if (new_todo_units
!= units_written
)
9036 payload_length_bytes
=
9037 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
9038 (gdb_byte
*) p
, &units_written
,
9039 payload_capacity_bytes
);
9042 p
+= payload_length_bytes
;
9043 if (use_length
&& units_written
< todo_units
)
9045 /* Escape chars have filled up the buffer prematurely,
9046 and we have actually sent fewer units than planned.
9047 Fix-up the length field of the packet. Use the same
9048 number of characters as before. */
9049 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
9051 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
9056 /* Normal mode: Send target system values byte by byte, in
9057 increasing byte addresses. Each byte is encoded as a two hex
9059 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
9060 units_written
= todo_units
;
9063 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
9064 getpkt (&rs
->buf
, 0);
9066 if (rs
->buf
[0] == 'E')
9067 return TARGET_XFER_E_IO
;
9069 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
9070 send fewer units than we'd planned. */
9071 *xfered_len_units
= (ULONGEST
) units_written
;
9072 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9075 /* Write memory data directly to the remote machine.
9076 This does not inform the data cache; the data cache uses this.
9077 MEMADDR is the address in the remote memory space.
9078 MYADDR is the address of the buffer in our space.
9079 LEN is the number of bytes.
9081 Return the transferred status, error or OK (an
9082 'enum target_xfer_status' value). Save the number of bytes
9083 transferred in *XFERED_LEN. Only transfer a single packet. */
9086 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
9087 ULONGEST len
, int unit_size
,
9088 ULONGEST
*xfered_len
)
9090 const char *packet_format
= NULL
;
9092 /* Check whether the target supports binary download. */
9093 check_binary_download (memaddr
);
9095 switch (packet_support (PACKET_X
))
9098 packet_format
= "X";
9100 case PACKET_DISABLE
:
9101 packet_format
= "M";
9103 case PACKET_SUPPORT_UNKNOWN
:
9104 internal_error (__FILE__
, __LINE__
,
9105 _("remote_write_bytes: bad internal state"));
9107 internal_error (__FILE__
, __LINE__
, _("bad switch"));
9110 return remote_write_bytes_aux (packet_format
,
9111 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
9112 packet_format
[0], 1);
9115 /* Read memory data directly from the remote machine.
9116 This does not use the data cache; the data cache uses this.
9117 MEMADDR is the address in the remote memory space.
9118 MYADDR is the address of the buffer in our space.
9119 LEN_UNITS is the number of addressable memory units to read..
9120 UNIT_SIZE is the length in bytes of an addressable unit.
9122 Return the transferred status, error or OK (an
9123 'enum target_xfer_status' value). Save the number of bytes
9124 transferred in *XFERED_LEN_UNITS.
9126 See the comment of remote_write_bytes_aux for an example of
9127 memory read/write exchange between gdb and the stub. */
9130 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
9132 int unit_size
, ULONGEST
*xfered_len_units
)
9134 struct remote_state
*rs
= get_remote_state ();
9135 int buf_size_bytes
; /* Max size of packet output buffer. */
9140 buf_size_bytes
= get_memory_read_packet_size ();
9141 /* The packet buffer will be large enough for the payload;
9142 get_memory_packet_size ensures this. */
9144 /* Number of units that will fit. */
9145 todo_units
= std::min (len_units
,
9146 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
9148 /* Construct "m"<memaddr>","<len>". */
9149 memaddr
= remote_address_masked (memaddr
);
9150 p
= rs
->buf
.data ();
9152 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9154 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
9157 getpkt (&rs
->buf
, 0);
9158 if (rs
->buf
[0] == 'E'
9159 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
9160 && rs
->buf
[3] == '\0')
9161 return TARGET_XFER_E_IO
;
9162 /* Reply describes memory byte by byte, each byte encoded as two hex
9164 p
= rs
->buf
.data ();
9165 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
9166 /* Return what we have. Let higher layers handle partial reads. */
9167 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
9168 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9171 /* Using the set of read-only target sections of remote, read live
9174 For interface/parameters/return description see target.h,
9178 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
9182 ULONGEST
*xfered_len
)
9184 const struct target_section
*secp
;
9186 secp
= target_section_by_addr (this, memaddr
);
9188 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
9190 ULONGEST memend
= memaddr
+ len
;
9192 const target_section_table
*table
= target_get_section_table (this);
9193 for (const target_section
&p
: *table
)
9195 if (memaddr
>= p
.addr
)
9197 if (memend
<= p
.endaddr
)
9199 /* Entire transfer is within this section. */
9200 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9203 else if (memaddr
>= p
.endaddr
)
9205 /* This section ends before the transfer starts. */
9210 /* This section overlaps the transfer. Just do half. */
9211 len
= p
.endaddr
- memaddr
;
9212 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9219 return TARGET_XFER_EOF
;
9222 /* Similar to remote_read_bytes_1, but it reads from the remote stub
9223 first if the requested memory is unavailable in traceframe.
9224 Otherwise, fall back to remote_read_bytes_1. */
9227 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
9228 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
9229 ULONGEST
*xfered_len
)
9232 return TARGET_XFER_EOF
;
9234 if (get_traceframe_number () != -1)
9236 std::vector
<mem_range
> available
;
9238 /* If we fail to get the set of available memory, then the
9239 target does not support querying traceframe info, and so we
9240 attempt reading from the traceframe anyway (assuming the
9241 target implements the old QTro packet then). */
9242 if (traceframe_available_memory (&available
, memaddr
, len
))
9244 if (available
.empty () || available
[0].start
!= memaddr
)
9246 enum target_xfer_status res
;
9248 /* Don't read into the traceframe's available
9250 if (!available
.empty ())
9252 LONGEST oldlen
= len
;
9254 len
= available
[0].start
- memaddr
;
9255 gdb_assert (len
<= oldlen
);
9258 /* This goes through the topmost target again. */
9259 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
9260 len
, unit_size
, xfered_len
);
9261 if (res
== TARGET_XFER_OK
)
9262 return TARGET_XFER_OK
;
9265 /* No use trying further, we know some memory starting
9266 at MEMADDR isn't available. */
9268 return (*xfered_len
!= 0) ?
9269 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
9273 /* Don't try to read more than how much is available, in
9274 case the target implements the deprecated QTro packet to
9275 cater for older GDBs (the target's knowledge of read-only
9276 sections may be outdated by now). */
9277 len
= available
[0].length
;
9281 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
9286 /* Sends a packet with content determined by the printf format string
9287 FORMAT and the remaining arguments, then gets the reply. Returns
9288 whether the packet was a success, a failure, or unknown. */
9291 remote_target::remote_send_printf (const char *format
, ...)
9293 struct remote_state
*rs
= get_remote_state ();
9294 int max_size
= get_remote_packet_size ();
9297 va_start (ap
, format
);
9300 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
9304 if (size
>= max_size
)
9305 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
9307 if (putpkt (rs
->buf
) < 0)
9308 error (_("Communication problem with target."));
9311 getpkt (&rs
->buf
, 0);
9313 return packet_check_result (rs
->buf
);
9316 /* Flash writing can take quite some time. We'll set
9317 effectively infinite timeout for flash operations.
9318 In future, we'll need to decide on a better approach. */
9319 static const int remote_flash_timeout
= 1000;
9322 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9324 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9325 enum packet_result ret
;
9326 scoped_restore restore_timeout
9327 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9329 ret
= remote_send_printf ("vFlashErase:%s,%s",
9330 phex (address
, addr_size
),
9334 case PACKET_UNKNOWN
:
9335 error (_("Remote target does not support flash erase"));
9337 error (_("Error erasing flash with vFlashErase packet"));
9344 remote_target::remote_flash_write (ULONGEST address
,
9345 ULONGEST length
, ULONGEST
*xfered_len
,
9346 const gdb_byte
*data
)
9348 scoped_restore restore_timeout
9349 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9350 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9355 remote_target::flash_done ()
9359 scoped_restore restore_timeout
9360 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9362 ret
= remote_send_printf ("vFlashDone");
9366 case PACKET_UNKNOWN
:
9367 error (_("Remote target does not support vFlashDone"));
9369 error (_("Error finishing flash operation"));
9376 remote_target::files_info ()
9378 puts_filtered ("Debugging a target over a serial line.\n");
9381 /* Stuff for dealing with the packets which are part of this protocol.
9382 See comment at top of file for details. */
9384 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9385 error to higher layers. Called when a serial error is detected.
9386 The exception message is STRING, followed by a colon and a blank,
9387 the system error message for errno at function entry and final dot
9388 for output compatibility with throw_perror_with_name. */
9391 unpush_and_perror (remote_target
*target
, const char *string
)
9393 int saved_errno
= errno
;
9395 remote_unpush_target (target
);
9396 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9397 safe_strerror (saved_errno
));
9400 /* Read a single character from the remote end. The current quit
9401 handler is overridden to avoid quitting in the middle of packet
9402 sequence, as that would break communication with the remote server.
9403 See remote_serial_quit_handler for more detail. */
9406 remote_target::readchar (int timeout
)
9409 struct remote_state
*rs
= get_remote_state ();
9412 scoped_restore restore_quit_target
9413 = make_scoped_restore (&curr_quit_handler_target
, this);
9414 scoped_restore restore_quit
9415 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9417 rs
->got_ctrlc_during_io
= 0;
9419 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9421 if (rs
->got_ctrlc_during_io
)
9428 switch ((enum serial_rc
) ch
)
9431 remote_unpush_target (this);
9432 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9435 unpush_and_perror (this, _("Remote communication error. "
9436 "Target disconnected."));
9438 case SERIAL_TIMEOUT
:
9444 /* Wrapper for serial_write that closes the target and throws if
9445 writing fails. The current quit handler is overridden to avoid
9446 quitting in the middle of packet sequence, as that would break
9447 communication with the remote server. See
9448 remote_serial_quit_handler for more detail. */
9451 remote_target::remote_serial_write (const char *str
, int len
)
9453 struct remote_state
*rs
= get_remote_state ();
9455 scoped_restore restore_quit_target
9456 = make_scoped_restore (&curr_quit_handler_target
, this);
9457 scoped_restore restore_quit
9458 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9460 rs
->got_ctrlc_during_io
= 0;
9462 if (serial_write (rs
->remote_desc
, str
, len
))
9464 unpush_and_perror (this, _("Remote communication error. "
9465 "Target disconnected."));
9468 if (rs
->got_ctrlc_during_io
)
9472 /* Return a string representing an escaped version of BUF, of len N.
9473 E.g. \n is converted to \\n, \t to \\t, etc. */
9476 escape_buffer (const char *buf
, int n
)
9480 stb
.putstrn (buf
, n
, '\\');
9481 return std::move (stb
.string ());
9484 /* Display a null-terminated packet on stdout, for debugging, using C
9488 print_packet (const char *buf
)
9490 puts_filtered ("\"");
9491 fputstr_filtered (buf
, '"', gdb_stdout
);
9492 puts_filtered ("\"");
9496 remote_target::putpkt (const char *buf
)
9498 return putpkt_binary (buf
, strlen (buf
));
9501 /* Wrapper around remote_target::putpkt to avoid exporting
9505 putpkt (remote_target
*remote
, const char *buf
)
9507 return remote
->putpkt (buf
);
9510 /* Send a packet to the remote machine, with error checking. The data
9511 of the packet is in BUF. The string in BUF can be at most
9512 get_remote_packet_size () - 5 to account for the $, # and checksum,
9513 and for a possible /0 if we are debugging (remote_debug) and want
9514 to print the sent packet as a string. */
9517 remote_target::putpkt_binary (const char *buf
, int cnt
)
9519 struct remote_state
*rs
= get_remote_state ();
9521 unsigned char csum
= 0;
9522 gdb::def_vector
<char> data (cnt
+ 6);
9523 char *buf2
= data
.data ();
9529 /* Catch cases like trying to read memory or listing threads while
9530 we're waiting for a stop reply. The remote server wouldn't be
9531 ready to handle this request, so we'd hang and timeout. We don't
9532 have to worry about this in synchronous mode, because in that
9533 case it's not possible to issue a command while the target is
9534 running. This is not a problem in non-stop mode, because in that
9535 case, the stub is always ready to process serial input. */
9536 if (!target_is_non_stop_p ()
9537 && target_is_async_p ()
9538 && rs
->waiting_for_stop_reply
)
9540 error (_("Cannot execute this command while the target is running.\n"
9541 "Use the \"interrupt\" command to stop the target\n"
9542 "and then try again."));
9545 /* We're sending out a new packet. Make sure we don't look at a
9546 stale cached response. */
9547 rs
->cached_wait_status
= 0;
9549 /* Copy the packet into buffer BUF2, encapsulating it
9550 and giving it a checksum. */
9555 for (i
= 0; i
< cnt
; i
++)
9561 *p
++ = tohex ((csum
>> 4) & 0xf);
9562 *p
++ = tohex (csum
& 0xf);
9564 /* Send it over and over until we get a positive ack. */
9572 int len
= (int) (p
- buf2
);
9575 if (remote_packet_max_chars
< 0)
9578 max_chars
= remote_packet_max_chars
;
9581 = escape_buffer (buf2
, std::min (len
, max_chars
));
9583 if (len
> max_chars
)
9584 remote_debug_printf_nofunc
9585 ("Sending packet: %s [%d bytes omitted]", str
.c_str (),
9588 remote_debug_printf_nofunc ("Sending packet: %s", str
.c_str ());
9590 remote_serial_write (buf2
, p
- buf2
);
9592 /* If this is a no acks version of the remote protocol, send the
9593 packet and move on. */
9597 /* Read until either a timeout occurs (-2) or '+' is read.
9598 Handle any notification that arrives in the mean time. */
9601 ch
= readchar (remote_timeout
);
9606 remote_debug_printf_nofunc ("Received Ack");
9609 remote_debug_printf_nofunc ("Received Nak");
9611 case SERIAL_TIMEOUT
:
9615 break; /* Retransmit buffer. */
9618 remote_debug_printf ("Packet instead of Ack, ignoring it");
9619 /* It's probably an old response sent because an ACK
9620 was lost. Gobble up the packet and ack it so it
9621 doesn't get retransmitted when we resend this
9624 remote_serial_write ("+", 1);
9625 continue; /* Now, go look for +. */
9632 /* If we got a notification, handle it, and go back to looking
9634 /* We've found the start of a notification. Now
9635 collect the data. */
9636 val
= read_frame (&rs
->buf
);
9639 remote_debug_printf_nofunc
9640 (" Notification received: %s",
9641 escape_buffer (rs
->buf
.data (), val
).c_str ());
9643 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9644 /* We're in sync now, rewait for the ack. */
9648 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9654 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9658 break; /* Here to retransmit. */
9662 /* This is wrong. If doing a long backtrace, the user should be
9663 able to get out next time we call QUIT, without anything as
9664 violent as interrupt_query. If we want to provide a way out of
9665 here without getting to the next QUIT, it should be based on
9666 hitting ^C twice as in remote_wait. */
9678 /* Come here after finding the start of a frame when we expected an
9679 ack. Do our best to discard the rest of this packet. */
9682 remote_target::skip_frame ()
9688 c
= readchar (remote_timeout
);
9691 case SERIAL_TIMEOUT
:
9692 /* Nothing we can do. */
9695 /* Discard the two bytes of checksum and stop. */
9696 c
= readchar (remote_timeout
);
9698 c
= readchar (remote_timeout
);
9701 case '*': /* Run length encoding. */
9702 /* Discard the repeat count. */
9703 c
= readchar (remote_timeout
);
9708 /* A regular character. */
9714 /* Come here after finding the start of the frame. Collect the rest
9715 into *BUF, verifying the checksum, length, and handling run-length
9716 compression. NUL terminate the buffer. If there is not enough room,
9719 Returns -1 on error, number of characters in buffer (ignoring the
9720 trailing NULL) on success. (could be extended to return one of the
9721 SERIAL status indications). */
9724 remote_target::read_frame (gdb::char_vector
*buf_p
)
9729 char *buf
= buf_p
->data ();
9730 struct remote_state
*rs
= get_remote_state ();
9737 c
= readchar (remote_timeout
);
9740 case SERIAL_TIMEOUT
:
9741 remote_debug_printf ("Timeout in mid-packet, retrying");
9745 remote_debug_printf ("Saw new packet start in middle of old one");
9746 return -1; /* Start a new packet, count retries. */
9750 unsigned char pktcsum
;
9756 check_0
= readchar (remote_timeout
);
9758 check_1
= readchar (remote_timeout
);
9760 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9762 remote_debug_printf ("Timeout in checksum, retrying");
9765 else if (check_0
< 0 || check_1
< 0)
9767 remote_debug_printf ("Communication error in checksum");
9771 /* Don't recompute the checksum; with no ack packets we
9772 don't have any way to indicate a packet retransmission
9777 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9778 if (csum
== pktcsum
)
9782 ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s",
9783 pktcsum
, csum
, escape_buffer (buf
, bc
).c_str ());
9785 /* Number of characters in buffer ignoring trailing
9789 case '*': /* Run length encoding. */
9794 c
= readchar (remote_timeout
);
9796 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9798 /* The character before ``*'' is repeated. */
9800 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9802 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9804 /* Make some more room in the buffer. */
9805 buf_p
->resize (buf_p
->size () + repeat
);
9806 buf
= buf_p
->data ();
9809 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9815 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9819 if (bc
>= buf_p
->size () - 1)
9821 /* Make some more room in the buffer. */
9822 buf_p
->resize (buf_p
->size () * 2);
9823 buf
= buf_p
->data ();
9833 /* Set this to the maximum number of seconds to wait instead of waiting forever
9834 in target_wait(). If this timer times out, then it generates an error and
9835 the command is aborted. This replaces most of the need for timeouts in the
9836 GDB test suite, and makes it possible to distinguish between a hung target
9837 and one with slow communications. */
9839 static int watchdog
= 0;
9841 show_watchdog (struct ui_file
*file
, int from_tty
,
9842 struct cmd_list_element
*c
, const char *value
)
9844 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
9847 /* Read a packet from the remote machine, with error checking, and
9848 store it in *BUF. Resize *BUF if necessary to hold the result. If
9849 FOREVER, wait forever rather than timing out; this is used (in
9850 synchronous mode) to wait for a target that is is executing user
9852 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9853 don't have to change all the calls to getpkt to deal with the
9854 return value, because at the moment I don't know what the right
9855 thing to do it for those. */
9858 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9860 getpkt_sane (buf
, forever
);
9864 /* Read a packet from the remote machine, with error checking, and
9865 store it in *BUF. Resize *BUF if necessary to hold the result. If
9866 FOREVER, wait forever rather than timing out; this is used (in
9867 synchronous mode) to wait for a target that is is executing user
9868 code to stop. If FOREVER == 0, this function is allowed to time
9869 out gracefully and return an indication of this to the caller.
9870 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9871 consider receiving a notification enough reason to return to the
9872 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9873 holds a notification or not (a regular packet). */
9876 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9877 int forever
, int expecting_notif
,
9880 struct remote_state
*rs
= get_remote_state ();
9886 /* We're reading a new response. Make sure we don't look at a
9887 previously cached response. */
9888 rs
->cached_wait_status
= 0;
9890 strcpy (buf
->data (), "timeout");
9893 timeout
= watchdog
> 0 ? watchdog
: -1;
9894 else if (expecting_notif
)
9895 timeout
= 0; /* There should already be a char in the buffer. If
9898 timeout
= remote_timeout
;
9902 /* Process any number of notifications, and then return when
9906 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9908 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9910 /* This can loop forever if the remote side sends us
9911 characters continuously, but if it pauses, we'll get
9912 SERIAL_TIMEOUT from readchar because of timeout. Then
9913 we'll count that as a retry.
9915 Note that even when forever is set, we will only wait
9916 forever prior to the start of a packet. After that, we
9917 expect characters to arrive at a brisk pace. They should
9918 show up within remote_timeout intervals. */
9920 c
= readchar (timeout
);
9921 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9923 if (c
== SERIAL_TIMEOUT
)
9925 if (expecting_notif
)
9926 return -1; /* Don't complain, it's normal to not get
9927 anything in this case. */
9929 if (forever
) /* Watchdog went off? Kill the target. */
9931 remote_unpush_target (this);
9932 throw_error (TARGET_CLOSE_ERROR
,
9933 _("Watchdog timeout has expired. "
9934 "Target detached."));
9937 remote_debug_printf ("Timed out.");
9941 /* We've found the start of a packet or notification.
9942 Now collect the data. */
9943 val
= read_frame (buf
);
9948 remote_serial_write ("-", 1);
9951 if (tries
> MAX_TRIES
)
9953 /* We have tried hard enough, and just can't receive the
9954 packet/notification. Give up. */
9955 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9957 /* Skip the ack char if we're in no-ack mode. */
9958 if (!rs
->noack_mode
)
9959 remote_serial_write ("+", 1);
9963 /* If we got an ordinary packet, return that to our caller. */
9970 if (remote_packet_max_chars
< 0)
9973 max_chars
= remote_packet_max_chars
;
9976 = escape_buffer (buf
->data (),
9977 std::min (val
, max_chars
));
9979 if (val
> max_chars
)
9980 remote_debug_printf_nofunc
9981 ("Packet received: %s [%d bytes omitted]", str
.c_str (),
9984 remote_debug_printf_nofunc ("Packet received: %s",
9988 /* Skip the ack char if we're in no-ack mode. */
9989 if (!rs
->noack_mode
)
9990 remote_serial_write ("+", 1);
9991 if (is_notif
!= NULL
)
9996 /* If we got a notification, handle it, and go back to looking
10000 gdb_assert (c
== '%');
10002 remote_debug_printf_nofunc
10003 (" Notification received: %s",
10004 escape_buffer (buf
->data (), val
).c_str ());
10006 if (is_notif
!= NULL
)
10009 handle_notification (rs
->notif_state
, buf
->data ());
10011 /* Notifications require no acknowledgement. */
10013 if (expecting_notif
)
10020 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
10022 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
10026 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
10029 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
10032 /* Kill any new fork children of process PID that haven't been
10033 processed by follow_fork. */
10036 remote_target::kill_new_fork_children (int pid
)
10038 remote_state
*rs
= get_remote_state ();
10039 struct notif_client
*notif
= ¬if_client_stop
;
10041 /* Kill the fork child threads of any threads in process PID
10042 that are stopped at a fork event. */
10043 for (thread_info
*thread
: all_non_exited_threads (this))
10045 struct target_waitstatus
*ws
= &thread
->pending_follow
;
10047 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
10049 int child_pid
= ws
->value
.related_pid
.pid ();
10052 res
= remote_vkill (child_pid
);
10054 error (_("Can't kill fork child process %d"), child_pid
);
10058 /* Check for any pending fork events (not reported or processed yet)
10059 in process PID and kill those fork child threads as well. */
10060 remote_notif_get_pending_events (notif
);
10061 for (auto &event
: rs
->stop_reply_queue
)
10062 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
10064 int child_pid
= event
->ws
.value
.related_pid
.pid ();
10067 res
= remote_vkill (child_pid
);
10069 error (_("Can't kill fork child process %d"), child_pid
);
10074 /* Target hook to kill the current inferior. */
10077 remote_target::kill ()
10080 int pid
= inferior_ptid
.pid ();
10081 struct remote_state
*rs
= get_remote_state ();
10083 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
10085 /* If we're stopped while forking and we haven't followed yet,
10086 kill the child task. We need to do this before killing the
10087 parent task because if this is a vfork then the parent will
10089 kill_new_fork_children (pid
);
10091 res
= remote_vkill (pid
);
10094 target_mourn_inferior (inferior_ptid
);
10099 /* If we are in 'target remote' mode and we are killing the only
10100 inferior, then we will tell gdbserver to exit and unpush the
10102 if (res
== -1 && !remote_multi_process_p (rs
)
10103 && number_of_live_inferiors (this) == 1)
10107 /* We've killed the remote end, we get to mourn it. If we are
10108 not in extended mode, mourning the inferior also unpushes
10109 remote_ops from the target stack, which closes the remote
10111 target_mourn_inferior (inferior_ptid
);
10116 error (_("Can't kill process"));
10119 /* Send a kill request to the target using the 'vKill' packet. */
10122 remote_target::remote_vkill (int pid
)
10124 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
10127 remote_state
*rs
= get_remote_state ();
10129 /* Tell the remote target to detach. */
10130 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
10132 getpkt (&rs
->buf
, 0);
10134 switch (packet_ok (rs
->buf
,
10135 &remote_protocol_packets
[PACKET_vKill
]))
10141 case PACKET_UNKNOWN
:
10144 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
10148 /* Send a kill request to the target using the 'k' packet. */
10151 remote_target::remote_kill_k ()
10153 /* Catch errors so the user can quit from gdb even when we
10154 aren't on speaking terms with the remote system. */
10159 catch (const gdb_exception_error
&ex
)
10161 if (ex
.error
== TARGET_CLOSE_ERROR
)
10163 /* If we got an (EOF) error that caused the target
10164 to go away, then we're done, that's what we wanted.
10165 "k" is susceptible to cause a premature EOF, given
10166 that the remote server isn't actually required to
10167 reply to "k", and it can happen that it doesn't
10168 even get to reply ACK to the "k". */
10172 /* Otherwise, something went wrong. We didn't actually kill
10173 the target. Just propagate the exception, and let the
10174 user or higher layers decide what to do. */
10180 remote_target::mourn_inferior ()
10182 struct remote_state
*rs
= get_remote_state ();
10184 /* We're no longer interested in notification events of an inferior
10185 that exited or was killed/detached. */
10186 discard_pending_stop_replies (current_inferior ());
10188 /* In 'target remote' mode with one inferior, we close the connection. */
10189 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
10191 remote_unpush_target (this);
10195 /* In case we got here due to an error, but we're going to stay
10197 rs
->waiting_for_stop_reply
= 0;
10199 /* If the current general thread belonged to the process we just
10200 detached from or has exited, the remote side current general
10201 thread becomes undefined. Considering a case like this:
10203 - We just got here due to a detach.
10204 - The process that we're detaching from happens to immediately
10205 report a global breakpoint being hit in non-stop mode, in the
10206 same thread we had selected before.
10207 - GDB attaches to this process again.
10208 - This event happens to be the next event we handle.
10210 GDB would consider that the current general thread didn't need to
10211 be set on the stub side (with Hg), since for all it knew,
10212 GENERAL_THREAD hadn't changed.
10214 Notice that although in all-stop mode, the remote server always
10215 sets the current thread to the thread reporting the stop event,
10216 that doesn't happen in non-stop mode; in non-stop, the stub *must
10217 not* change the current thread when reporting a breakpoint hit,
10218 due to the decoupling of event reporting and event handling.
10220 To keep things simple, we always invalidate our notion of the
10222 record_currthread (rs
, minus_one_ptid
);
10224 /* Call common code to mark the inferior as not running. */
10225 generic_mourn_inferior ();
10229 extended_remote_target::supports_disable_randomization ()
10231 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
10235 remote_target::extended_remote_disable_randomization (int val
)
10237 struct remote_state
*rs
= get_remote_state ();
10240 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10241 "QDisableRandomization:%x", val
);
10243 reply
= remote_get_noisy_reply ();
10244 if (*reply
== '\0')
10245 error (_("Target does not support QDisableRandomization."));
10246 if (strcmp (reply
, "OK") != 0)
10247 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10251 remote_target::extended_remote_run (const std::string
&args
)
10253 struct remote_state
*rs
= get_remote_state ();
10255 const char *remote_exec_file
= get_remote_exec_file ();
10257 /* If the user has disabled vRun support, or we have detected that
10258 support is not available, do not try it. */
10259 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10262 strcpy (rs
->buf
.data (), "vRun;");
10263 len
= strlen (rs
->buf
.data ());
10265 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10266 error (_("Remote file name too long for run packet"));
10267 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10268 strlen (remote_exec_file
));
10270 if (!args
.empty ())
10274 gdb_argv
argv (args
.c_str ());
10275 for (i
= 0; argv
[i
] != NULL
; i
++)
10277 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10278 error (_("Argument list too long for run packet"));
10279 rs
->buf
[len
++] = ';';
10280 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10285 rs
->buf
[len
++] = '\0';
10288 getpkt (&rs
->buf
, 0);
10290 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10293 /* We have a wait response. All is well. */
10295 case PACKET_UNKNOWN
:
10298 if (remote_exec_file
[0] == '\0')
10299 error (_("Running the default executable on the remote target failed; "
10300 "try \"set remote exec-file\"?"));
10302 error (_("Running \"%s\" on the remote target failed"),
10305 gdb_assert_not_reached (_("bad switch"));
10309 /* Helper function to send set/unset environment packets. ACTION is
10310 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10311 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10315 remote_target::send_environment_packet (const char *action
,
10316 const char *packet
,
10319 remote_state
*rs
= get_remote_state ();
10321 /* Convert the environment variable to an hex string, which
10322 is the best format to be transmitted over the wire. */
10323 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10326 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10327 "%s:%s", packet
, encoded_value
.c_str ());
10330 getpkt (&rs
->buf
, 0);
10331 if (strcmp (rs
->buf
.data (), "OK") != 0)
10332 warning (_("Unable to %s environment variable '%s' on remote."),
10336 /* Helper function to handle the QEnvironment* packets. */
10339 remote_target::extended_remote_environment_support ()
10341 remote_state
*rs
= get_remote_state ();
10343 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10345 putpkt ("QEnvironmentReset");
10346 getpkt (&rs
->buf
, 0);
10347 if (strcmp (rs
->buf
.data (), "OK") != 0)
10348 warning (_("Unable to reset environment on remote."));
10351 gdb_environ
*e
= ¤t_inferior ()->environment
;
10353 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10354 for (const std::string
&el
: e
->user_set_env ())
10355 send_environment_packet ("set", "QEnvironmentHexEncoded",
10358 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10359 for (const std::string
&el
: e
->user_unset_env ())
10360 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10363 /* Helper function to set the current working directory for the
10364 inferior in the remote target. */
10367 remote_target::extended_remote_set_inferior_cwd ()
10369 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10371 const char *inferior_cwd
= get_inferior_cwd ();
10372 remote_state
*rs
= get_remote_state ();
10374 if (inferior_cwd
!= NULL
)
10376 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10377 strlen (inferior_cwd
));
10379 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10380 "QSetWorkingDir:%s", hexpath
.c_str ());
10384 /* An empty inferior_cwd means that the user wants us to
10385 reset the remote server's inferior's cwd. */
10386 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10387 "QSetWorkingDir:");
10391 getpkt (&rs
->buf
, 0);
10392 if (packet_ok (rs
->buf
,
10393 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10396 Remote replied unexpectedly while setting the inferior's working\n\
10403 /* In the extended protocol we want to be able to do things like
10404 "run" and have them basically work as expected. So we need
10405 a special create_inferior function. We support changing the
10406 executable file and the command line arguments, but not the
10410 extended_remote_target::create_inferior (const char *exec_file
,
10411 const std::string
&args
,
10412 char **env
, int from_tty
)
10416 struct remote_state
*rs
= get_remote_state ();
10417 const char *remote_exec_file
= get_remote_exec_file ();
10419 /* If running asynchronously, register the target file descriptor
10420 with the event loop. */
10421 if (target_can_async_p ())
10424 /* Disable address space randomization if requested (and supported). */
10425 if (supports_disable_randomization ())
10426 extended_remote_disable_randomization (disable_randomization
);
10428 /* If startup-with-shell is on, we inform gdbserver to start the
10429 remote inferior using a shell. */
10430 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10432 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10433 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10435 getpkt (&rs
->buf
, 0);
10436 if (strcmp (rs
->buf
.data (), "OK") != 0)
10438 Remote replied unexpectedly while setting startup-with-shell: %s"),
10442 extended_remote_environment_support ();
10444 extended_remote_set_inferior_cwd ();
10446 /* Now restart the remote server. */
10447 run_worked
= extended_remote_run (args
) != -1;
10450 /* vRun was not supported. Fail if we need it to do what the
10452 if (remote_exec_file
[0])
10453 error (_("Remote target does not support \"set remote exec-file\""));
10454 if (!args
.empty ())
10455 error (_("Remote target does not support \"set args\" or run ARGS"));
10457 /* Fall back to "R". */
10458 extended_remote_restart ();
10461 /* vRun's success return is a stop reply. */
10462 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10463 add_current_inferior_and_thread (stop_reply
);
10465 /* Get updated offsets, if the stub uses qOffsets. */
10470 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10471 the list of conditions (in agent expression bytecode format), if any, the
10472 target needs to evaluate. The output is placed into the packet buffer
10473 started from BUF and ended at BUF_END. */
10476 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10477 struct bp_target_info
*bp_tgt
, char *buf
,
10480 if (bp_tgt
->conditions
.empty ())
10483 buf
+= strlen (buf
);
10484 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10487 /* Send conditions to the target. */
10488 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10490 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10491 buf
+= strlen (buf
);
10492 for (int i
= 0; i
< aexpr
->len
; ++i
)
10493 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10500 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10501 struct bp_target_info
*bp_tgt
, char *buf
)
10503 if (bp_tgt
->tcommands
.empty ())
10506 buf
+= strlen (buf
);
10508 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10509 buf
+= strlen (buf
);
10511 /* Concatenate all the agent expressions that are commands into the
10513 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10515 sprintf (buf
, "X%x,", aexpr
->len
);
10516 buf
+= strlen (buf
);
10517 for (int i
= 0; i
< aexpr
->len
; ++i
)
10518 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10523 /* Insert a breakpoint. On targets that have software breakpoint
10524 support, we ask the remote target to do the work; on targets
10525 which don't, we insert a traditional memory breakpoint. */
10528 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10529 struct bp_target_info
*bp_tgt
)
10531 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10532 If it succeeds, then set the support to PACKET_ENABLE. If it
10533 fails, and the user has explicitly requested the Z support then
10534 report an error, otherwise, mark it disabled and go on. */
10536 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10538 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10539 struct remote_state
*rs
;
10542 /* Make sure the remote is pointing at the right process, if
10544 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10545 set_general_process ();
10547 rs
= get_remote_state ();
10548 p
= rs
->buf
.data ();
10549 endbuf
= p
+ get_remote_packet_size ();
10554 addr
= (ULONGEST
) remote_address_masked (addr
);
10555 p
+= hexnumstr (p
, addr
);
10556 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10558 if (supports_evaluation_of_breakpoint_conditions ())
10559 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10561 if (can_run_breakpoint_commands ())
10562 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10565 getpkt (&rs
->buf
, 0);
10567 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10573 case PACKET_UNKNOWN
:
10578 /* If this breakpoint has target-side commands but this stub doesn't
10579 support Z0 packets, throw error. */
10580 if (!bp_tgt
->tcommands
.empty ())
10581 throw_error (NOT_SUPPORTED_ERROR
, _("\
10582 Target doesn't support breakpoints that have target side commands."));
10584 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10588 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10589 struct bp_target_info
*bp_tgt
,
10590 enum remove_bp_reason reason
)
10592 CORE_ADDR addr
= bp_tgt
->placed_address
;
10593 struct remote_state
*rs
= get_remote_state ();
10595 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10597 char *p
= rs
->buf
.data ();
10598 char *endbuf
= p
+ get_remote_packet_size ();
10600 /* Make sure the remote is pointing at the right process, if
10602 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10603 set_general_process ();
10609 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10610 p
+= hexnumstr (p
, addr
);
10611 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10614 getpkt (&rs
->buf
, 0);
10616 return (rs
->buf
[0] == 'E');
10619 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10622 static enum Z_packet_type
10623 watchpoint_to_Z_packet (int type
)
10628 return Z_PACKET_WRITE_WP
;
10631 return Z_PACKET_READ_WP
;
10634 return Z_PACKET_ACCESS_WP
;
10637 internal_error (__FILE__
, __LINE__
,
10638 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10643 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10644 enum target_hw_bp_type type
, struct expression
*cond
)
10646 struct remote_state
*rs
= get_remote_state ();
10647 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10649 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10651 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10654 /* Make sure the remote is pointing at the right process, if
10656 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10657 set_general_process ();
10659 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10660 p
= strchr (rs
->buf
.data (), '\0');
10661 addr
= remote_address_masked (addr
);
10662 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10663 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10666 getpkt (&rs
->buf
, 0);
10668 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10672 case PACKET_UNKNOWN
:
10677 internal_error (__FILE__
, __LINE__
,
10678 _("remote_insert_watchpoint: reached end of function"));
10682 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10683 CORE_ADDR start
, int length
)
10685 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10687 return diff
< length
;
10692 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10693 enum target_hw_bp_type type
, struct expression
*cond
)
10695 struct remote_state
*rs
= get_remote_state ();
10696 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10698 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10700 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10703 /* Make sure the remote is pointing at the right process, if
10705 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10706 set_general_process ();
10708 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10709 p
= strchr (rs
->buf
.data (), '\0');
10710 addr
= remote_address_masked (addr
);
10711 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10712 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10714 getpkt (&rs
->buf
, 0);
10716 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10719 case PACKET_UNKNOWN
:
10724 internal_error (__FILE__
, __LINE__
,
10725 _("remote_remove_watchpoint: reached end of function"));
10729 static int remote_hw_watchpoint_limit
= -1;
10730 static int remote_hw_watchpoint_length_limit
= -1;
10731 static int remote_hw_breakpoint_limit
= -1;
10734 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10736 if (remote_hw_watchpoint_length_limit
== 0)
10738 else if (remote_hw_watchpoint_length_limit
< 0)
10740 else if (len
<= remote_hw_watchpoint_length_limit
)
10747 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10749 if (type
== bp_hardware_breakpoint
)
10751 if (remote_hw_breakpoint_limit
== 0)
10753 else if (remote_hw_breakpoint_limit
< 0)
10755 else if (cnt
<= remote_hw_breakpoint_limit
)
10760 if (remote_hw_watchpoint_limit
== 0)
10762 else if (remote_hw_watchpoint_limit
< 0)
10766 else if (cnt
<= remote_hw_watchpoint_limit
)
10772 /* The to_stopped_by_sw_breakpoint method of target remote. */
10775 remote_target::stopped_by_sw_breakpoint ()
10777 struct thread_info
*thread
= inferior_thread ();
10779 return (thread
->priv
!= NULL
10780 && (get_remote_thread_info (thread
)->stop_reason
10781 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10784 /* The to_supports_stopped_by_sw_breakpoint method of target
10788 remote_target::supports_stopped_by_sw_breakpoint ()
10790 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10793 /* The to_stopped_by_hw_breakpoint method of target remote. */
10796 remote_target::stopped_by_hw_breakpoint ()
10798 struct thread_info
*thread
= inferior_thread ();
10800 return (thread
->priv
!= NULL
10801 && (get_remote_thread_info (thread
)->stop_reason
10802 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10805 /* The to_supports_stopped_by_hw_breakpoint method of target
10809 remote_target::supports_stopped_by_hw_breakpoint ()
10811 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10815 remote_target::stopped_by_watchpoint ()
10817 struct thread_info
*thread
= inferior_thread ();
10819 return (thread
->priv
!= NULL
10820 && (get_remote_thread_info (thread
)->stop_reason
10821 == TARGET_STOPPED_BY_WATCHPOINT
));
10825 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10827 struct thread_info
*thread
= inferior_thread ();
10829 if (thread
->priv
!= NULL
10830 && (get_remote_thread_info (thread
)->stop_reason
10831 == TARGET_STOPPED_BY_WATCHPOINT
))
10833 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10842 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10843 struct bp_target_info
*bp_tgt
)
10845 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10846 struct remote_state
*rs
;
10850 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10853 /* Make sure the remote is pointing at the right process, if
10855 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10856 set_general_process ();
10858 rs
= get_remote_state ();
10859 p
= rs
->buf
.data ();
10860 endbuf
= p
+ get_remote_packet_size ();
10866 addr
= remote_address_masked (addr
);
10867 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10868 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10870 if (supports_evaluation_of_breakpoint_conditions ())
10871 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10873 if (can_run_breakpoint_commands ())
10874 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10877 getpkt (&rs
->buf
, 0);
10879 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10882 if (rs
->buf
[1] == '.')
10884 message
= strchr (&rs
->buf
[2], '.');
10886 error (_("Remote failure reply: %s"), message
+ 1);
10889 case PACKET_UNKNOWN
:
10894 internal_error (__FILE__
, __LINE__
,
10895 _("remote_insert_hw_breakpoint: reached end of function"));
10900 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10901 struct bp_target_info
*bp_tgt
)
10904 struct remote_state
*rs
= get_remote_state ();
10905 char *p
= rs
->buf
.data ();
10906 char *endbuf
= p
+ get_remote_packet_size ();
10908 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10911 /* Make sure the remote is pointing at the right process, if
10913 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10914 set_general_process ();
10920 addr
= remote_address_masked (bp_tgt
->placed_address
);
10921 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10922 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10925 getpkt (&rs
->buf
, 0);
10927 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10930 case PACKET_UNKNOWN
:
10935 internal_error (__FILE__
, __LINE__
,
10936 _("remote_remove_hw_breakpoint: reached end of function"));
10939 /* Verify memory using the "qCRC:" request. */
10942 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10944 struct remote_state
*rs
= get_remote_state ();
10945 unsigned long host_crc
, target_crc
;
10948 /* It doesn't make sense to use qCRC if the remote target is
10949 connected but not running. */
10950 if (target_has_execution ()
10951 && packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10953 enum packet_result result
;
10955 /* Make sure the remote is pointing at the right process. */
10956 set_general_process ();
10958 /* FIXME: assumes lma can fit into long. */
10959 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10960 (long) lma
, (long) size
);
10963 /* Be clever; compute the host_crc before waiting for target
10965 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10967 getpkt (&rs
->buf
, 0);
10969 result
= packet_ok (rs
->buf
,
10970 &remote_protocol_packets
[PACKET_qCRC
]);
10971 if (result
== PACKET_ERROR
)
10973 else if (result
== PACKET_OK
)
10975 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10976 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10978 return (host_crc
== target_crc
);
10982 return simple_verify_memory (this, data
, lma
, size
);
10985 /* compare-sections command
10987 With no arguments, compares each loadable section in the exec bfd
10988 with the same memory range on the target, and reports mismatches.
10989 Useful for verifying the image on the target against the exec file. */
10992 compare_sections_command (const char *args
, int from_tty
)
10995 const char *sectname
;
10996 bfd_size_type size
;
10999 int mismatched
= 0;
11003 if (!current_program_space
->exec_bfd ())
11004 error (_("command cannot be used without an exec file"));
11006 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
11012 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
11014 if (!(s
->flags
& SEC_LOAD
))
11015 continue; /* Skip non-loadable section. */
11017 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
11018 continue; /* Skip writeable sections */
11020 size
= bfd_section_size (s
);
11022 continue; /* Skip zero-length section. */
11024 sectname
= bfd_section_name (s
);
11025 if (args
&& strcmp (args
, sectname
) != 0)
11026 continue; /* Not the section selected by user. */
11028 matched
= 1; /* Do this section. */
11031 gdb::byte_vector
sectdata (size
);
11032 bfd_get_section_contents (current_program_space
->exec_bfd (), s
,
11033 sectdata
.data (), 0, size
);
11035 res
= target_verify_memory (sectdata
.data (), lma
, size
);
11038 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
11039 paddress (target_gdbarch (), lma
),
11040 paddress (target_gdbarch (), lma
+ size
));
11042 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
11043 paddress (target_gdbarch (), lma
),
11044 paddress (target_gdbarch (), lma
+ size
));
11046 printf_filtered ("matched.\n");
11049 printf_filtered ("MIS-MATCHED!\n");
11053 if (mismatched
> 0)
11054 warning (_("One or more sections of the target image does not match\n\
11055 the loaded file\n"));
11056 if (args
&& !matched
)
11057 printf_filtered (_("No loaded section named '%s'.\n"), args
);
11060 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
11061 into remote target. The number of bytes written to the remote
11062 target is returned, or -1 for error. */
11065 remote_target::remote_write_qxfer (const char *object_name
,
11066 const char *annex
, const gdb_byte
*writebuf
,
11067 ULONGEST offset
, LONGEST len
,
11068 ULONGEST
*xfered_len
,
11069 struct packet_config
*packet
)
11073 struct remote_state
*rs
= get_remote_state ();
11074 int max_size
= get_memory_write_packet_size ();
11076 if (packet_config_support (packet
) == PACKET_DISABLE
)
11077 return TARGET_XFER_E_IO
;
11079 /* Insert header. */
11080 i
= snprintf (rs
->buf
.data (), max_size
,
11081 "qXfer:%s:write:%s:%s:",
11082 object_name
, annex
? annex
: "",
11083 phex_nz (offset
, sizeof offset
));
11084 max_size
-= (i
+ 1);
11086 /* Escape as much data as fits into rs->buf. */
11087 buf_len
= remote_escape_output
11088 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
11090 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
11091 || getpkt_sane (&rs
->buf
, 0) < 0
11092 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11093 return TARGET_XFER_E_IO
;
11095 unpack_varlen_hex (rs
->buf
.data (), &n
);
11098 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11101 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
11102 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
11103 number of bytes read is returned, or 0 for EOF, or -1 for error.
11104 The number of bytes read may be less than LEN without indicating an
11105 EOF. PACKET is checked and updated to indicate whether the remote
11106 target supports this object. */
11109 remote_target::remote_read_qxfer (const char *object_name
,
11111 gdb_byte
*readbuf
, ULONGEST offset
,
11113 ULONGEST
*xfered_len
,
11114 struct packet_config
*packet
)
11116 struct remote_state
*rs
= get_remote_state ();
11117 LONGEST i
, n
, packet_len
;
11119 if (packet_config_support (packet
) == PACKET_DISABLE
)
11120 return TARGET_XFER_E_IO
;
11122 /* Check whether we've cached an end-of-object packet that matches
11124 if (rs
->finished_object
)
11126 if (strcmp (object_name
, rs
->finished_object
) == 0
11127 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
11128 && offset
== rs
->finished_offset
)
11129 return TARGET_XFER_EOF
;
11132 /* Otherwise, we're now reading something different. Discard
11134 xfree (rs
->finished_object
);
11135 xfree (rs
->finished_annex
);
11136 rs
->finished_object
= NULL
;
11137 rs
->finished_annex
= NULL
;
11140 /* Request only enough to fit in a single packet. The actual data
11141 may not, since we don't know how much of it will need to be escaped;
11142 the target is free to respond with slightly less data. We subtract
11143 five to account for the response type and the protocol frame. */
11144 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
11145 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
11146 "qXfer:%s:read:%s:%s,%s",
11147 object_name
, annex
? annex
: "",
11148 phex_nz (offset
, sizeof offset
),
11149 phex_nz (n
, sizeof n
));
11150 i
= putpkt (rs
->buf
);
11152 return TARGET_XFER_E_IO
;
11155 packet_len
= getpkt_sane (&rs
->buf
, 0);
11156 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11157 return TARGET_XFER_E_IO
;
11159 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
11160 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
11162 /* 'm' means there is (or at least might be) more data after this
11163 batch. That does not make sense unless there's at least one byte
11164 of data in this reply. */
11165 if (rs
->buf
[0] == 'm' && packet_len
== 1)
11166 error (_("Remote qXfer reply contained no data."));
11168 /* Got some data. */
11169 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
11170 packet_len
- 1, readbuf
, n
);
11172 /* 'l' is an EOF marker, possibly including a final block of data,
11173 or possibly empty. If we have the final block of a non-empty
11174 object, record this fact to bypass a subsequent partial read. */
11175 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
11177 rs
->finished_object
= xstrdup (object_name
);
11178 rs
->finished_annex
= xstrdup (annex
? annex
: "");
11179 rs
->finished_offset
= offset
+ i
;
11183 return TARGET_XFER_EOF
;
11187 return TARGET_XFER_OK
;
11191 enum target_xfer_status
11192 remote_target::xfer_partial (enum target_object object
,
11193 const char *annex
, gdb_byte
*readbuf
,
11194 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
11195 ULONGEST
*xfered_len
)
11197 struct remote_state
*rs
;
11201 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
11203 set_remote_traceframe ();
11204 set_general_thread (inferior_ptid
);
11206 rs
= get_remote_state ();
11208 /* Handle memory using the standard memory routines. */
11209 if (object
== TARGET_OBJECT_MEMORY
)
11211 /* If the remote target is connected but not running, we should
11212 pass this request down to a lower stratum (e.g. the executable
11214 if (!target_has_execution ())
11215 return TARGET_XFER_EOF
;
11217 if (writebuf
!= NULL
)
11218 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
11221 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
11225 /* Handle extra signal info using qxfer packets. */
11226 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
11229 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
11230 xfered_len
, &remote_protocol_packets
11231 [PACKET_qXfer_siginfo_read
]);
11233 return remote_write_qxfer ("siginfo", annex
,
11234 writebuf
, offset
, len
, xfered_len
,
11235 &remote_protocol_packets
11236 [PACKET_qXfer_siginfo_write
]);
11239 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
11242 return remote_read_qxfer ("statictrace", annex
,
11243 readbuf
, offset
, len
, xfered_len
,
11244 &remote_protocol_packets
11245 [PACKET_qXfer_statictrace_read
]);
11247 return TARGET_XFER_E_IO
;
11250 /* Only handle flash writes. */
11251 if (writebuf
!= NULL
)
11255 case TARGET_OBJECT_FLASH
:
11256 return remote_flash_write (offset
, len
, xfered_len
,
11260 return TARGET_XFER_E_IO
;
11264 /* Map pre-existing objects onto letters. DO NOT do this for new
11265 objects!!! Instead specify new query packets. */
11268 case TARGET_OBJECT_AVR
:
11272 case TARGET_OBJECT_AUXV
:
11273 gdb_assert (annex
== NULL
);
11274 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
11276 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
11278 case TARGET_OBJECT_AVAILABLE_FEATURES
:
11279 return remote_read_qxfer
11280 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
11281 &remote_protocol_packets
[PACKET_qXfer_features
]);
11283 case TARGET_OBJECT_LIBRARIES
:
11284 return remote_read_qxfer
11285 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
11286 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
11288 case TARGET_OBJECT_LIBRARIES_SVR4
:
11289 return remote_read_qxfer
11290 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
11291 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
11293 case TARGET_OBJECT_MEMORY_MAP
:
11294 gdb_assert (annex
== NULL
);
11295 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
11297 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
11299 case TARGET_OBJECT_OSDATA
:
11300 /* Should only get here if we're connected. */
11301 gdb_assert (rs
->remote_desc
);
11302 return remote_read_qxfer
11303 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
11304 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
11306 case TARGET_OBJECT_THREADS
:
11307 gdb_assert (annex
== NULL
);
11308 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
11310 &remote_protocol_packets
[PACKET_qXfer_threads
]);
11312 case TARGET_OBJECT_TRACEFRAME_INFO
:
11313 gdb_assert (annex
== NULL
);
11314 return remote_read_qxfer
11315 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11316 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11318 case TARGET_OBJECT_FDPIC
:
11319 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11321 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11323 case TARGET_OBJECT_OPENVMS_UIB
:
11324 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11326 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11328 case TARGET_OBJECT_BTRACE
:
11329 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11331 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11333 case TARGET_OBJECT_BTRACE_CONF
:
11334 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11336 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11338 case TARGET_OBJECT_EXEC_FILE
:
11339 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11341 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11344 return TARGET_XFER_E_IO
;
11347 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11348 large enough let the caller deal with it. */
11349 if (len
< get_remote_packet_size ())
11350 return TARGET_XFER_E_IO
;
11351 len
= get_remote_packet_size ();
11353 /* Except for querying the minimum buffer size, target must be open. */
11354 if (!rs
->remote_desc
)
11355 error (_("remote query is only available after target open"));
11357 gdb_assert (annex
!= NULL
);
11358 gdb_assert (readbuf
!= NULL
);
11360 p2
= rs
->buf
.data ();
11362 *p2
++ = query_type
;
11364 /* We used one buffer char for the remote protocol q command and
11365 another for the query type. As the remote protocol encapsulation
11366 uses 4 chars plus one extra in case we are debugging
11367 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11370 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11372 /* Bad caller may have sent forbidden characters. */
11373 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11378 gdb_assert (annex
[i
] == '\0');
11380 i
= putpkt (rs
->buf
);
11382 return TARGET_XFER_E_IO
;
11384 getpkt (&rs
->buf
, 0);
11385 strcpy ((char *) readbuf
, rs
->buf
.data ());
11387 *xfered_len
= strlen ((char *) readbuf
);
11388 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11391 /* Implementation of to_get_memory_xfer_limit. */
11394 remote_target::get_memory_xfer_limit ()
11396 return get_memory_write_packet_size ();
11400 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11401 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11402 CORE_ADDR
*found_addrp
)
11404 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11405 struct remote_state
*rs
= get_remote_state ();
11406 int max_size
= get_memory_write_packet_size ();
11407 struct packet_config
*packet
=
11408 &remote_protocol_packets
[PACKET_qSearch_memory
];
11409 /* Number of packet bytes used to encode the pattern;
11410 this could be more than PATTERN_LEN due to escape characters. */
11411 int escaped_pattern_len
;
11412 /* Amount of pattern that was encodable in the packet. */
11413 int used_pattern_len
;
11416 ULONGEST found_addr
;
11418 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
11420 return (target_read (this, TARGET_OBJECT_MEMORY
, NULL
, result
, addr
, len
)
11424 /* Don't go to the target if we don't have to. This is done before
11425 checking packet_config_support to avoid the possibility that a
11426 success for this edge case means the facility works in
11428 if (pattern_len
> search_space_len
)
11430 if (pattern_len
== 0)
11432 *found_addrp
= start_addr
;
11436 /* If we already know the packet isn't supported, fall back to the simple
11437 way of searching memory. */
11439 if (packet_config_support (packet
) == PACKET_DISABLE
)
11441 /* Target doesn't provided special support, fall back and use the
11442 standard support (copy memory and do the search here). */
11443 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11444 pattern
, pattern_len
, found_addrp
);
11447 /* Make sure the remote is pointing at the right process. */
11448 set_general_process ();
11450 /* Insert header. */
11451 i
= snprintf (rs
->buf
.data (), max_size
,
11452 "qSearch:memory:%s;%s;",
11453 phex_nz (start_addr
, addr_size
),
11454 phex_nz (search_space_len
, sizeof (search_space_len
)));
11455 max_size
-= (i
+ 1);
11457 /* Escape as much data as fits into rs->buf. */
11458 escaped_pattern_len
=
11459 remote_escape_output (pattern
, pattern_len
, 1,
11460 (gdb_byte
*) rs
->buf
.data () + i
,
11461 &used_pattern_len
, max_size
);
11463 /* Bail if the pattern is too large. */
11464 if (used_pattern_len
!= pattern_len
)
11465 error (_("Pattern is too large to transmit to remote target."));
11467 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11468 || getpkt_sane (&rs
->buf
, 0) < 0
11469 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11471 /* The request may not have worked because the command is not
11472 supported. If so, fall back to the simple way. */
11473 if (packet_config_support (packet
) == PACKET_DISABLE
)
11475 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11476 pattern
, pattern_len
, found_addrp
);
11481 if (rs
->buf
[0] == '0')
11483 else if (rs
->buf
[0] == '1')
11486 if (rs
->buf
[1] != ',')
11487 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11488 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11489 *found_addrp
= found_addr
;
11492 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11498 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11500 struct remote_state
*rs
= get_remote_state ();
11501 char *p
= rs
->buf
.data ();
11503 if (!rs
->remote_desc
)
11504 error (_("remote rcmd is only available after target open"));
11506 /* Send a NULL command across as an empty command. */
11507 if (command
== NULL
)
11510 /* The query prefix. */
11511 strcpy (rs
->buf
.data (), "qRcmd,");
11512 p
= strchr (rs
->buf
.data (), '\0');
11514 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11515 > get_remote_packet_size ())
11516 error (_("\"monitor\" command ``%s'' is too long."), command
);
11518 /* Encode the actual command. */
11519 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11521 if (putpkt (rs
->buf
) < 0)
11522 error (_("Communication problem with target."));
11524 /* get/display the response */
11529 /* XXX - see also remote_get_noisy_reply(). */
11530 QUIT
; /* Allow user to bail out with ^C. */
11532 if (getpkt_sane (&rs
->buf
, 0) == -1)
11534 /* Timeout. Continue to (try to) read responses.
11535 This is better than stopping with an error, assuming the stub
11536 is still executing the (long) monitor command.
11537 If needed, the user can interrupt gdb using C-c, obtaining
11538 an effect similar to stop on timeout. */
11541 buf
= rs
->buf
.data ();
11542 if (buf
[0] == '\0')
11543 error (_("Target does not support this command."));
11544 if (buf
[0] == 'O' && buf
[1] != 'K')
11546 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11549 if (strcmp (buf
, "OK") == 0)
11551 if (strlen (buf
) == 3 && buf
[0] == 'E'
11552 && isdigit (buf
[1]) && isdigit (buf
[2]))
11554 error (_("Protocol error with Rcmd"));
11556 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11558 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11560 fputc_unfiltered (c
, outbuf
);
11566 std::vector
<mem_region
>
11567 remote_target::memory_map ()
11569 std::vector
<mem_region
> result
;
11570 gdb::optional
<gdb::char_vector
> text
11571 = target_read_stralloc (current_inferior ()->top_target (),
11572 TARGET_OBJECT_MEMORY_MAP
, NULL
);
11575 result
= parse_memory_map (text
->data ());
11581 packet_command (const char *args
, int from_tty
)
11583 remote_target
*remote
= get_current_remote_target ();
11585 if (remote
== nullptr)
11586 error (_("command can only be used with remote target"));
11588 remote
->packet_command (args
, from_tty
);
11592 remote_target::packet_command (const char *args
, int from_tty
)
11595 error (_("remote-packet command requires packet text as argument"));
11597 puts_filtered ("sending: ");
11598 print_packet (args
);
11599 puts_filtered ("\n");
11602 remote_state
*rs
= get_remote_state ();
11604 getpkt (&rs
->buf
, 0);
11605 puts_filtered ("received: ");
11606 print_packet (rs
->buf
.data ());
11607 puts_filtered ("\n");
11611 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11613 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11615 static void threadset_test_cmd (char *cmd
, int tty
);
11617 static void threadalive_test (char *cmd
, int tty
);
11619 static void threadlist_test_cmd (char *cmd
, int tty
);
11621 int get_and_display_threadinfo (threadref
*ref
);
11623 static void threadinfo_test_cmd (char *cmd
, int tty
);
11625 static int thread_display_step (threadref
*ref
, void *context
);
11627 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11629 static void init_remote_threadtests (void);
11631 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11634 threadset_test_cmd (const char *cmd
, int tty
)
11636 int sample_thread
= SAMPLE_THREAD
;
11638 printf_filtered (_("Remote threadset test\n"));
11639 set_general_thread (sample_thread
);
11644 threadalive_test (const char *cmd
, int tty
)
11646 int sample_thread
= SAMPLE_THREAD
;
11647 int pid
= inferior_ptid
.pid ();
11648 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11650 if (remote_thread_alive (ptid
))
11651 printf_filtered ("PASS: Thread alive test\n");
11653 printf_filtered ("FAIL: Thread alive test\n");
11656 void output_threadid (char *title
, threadref
*ref
);
11659 output_threadid (char *title
, threadref
*ref
)
11663 pack_threadid (&hexid
[0], ref
); /* Convert thread id into hex. */
11665 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11669 threadlist_test_cmd (const char *cmd
, int tty
)
11672 threadref nextthread
;
11673 int done
, result_count
;
11674 threadref threadlist
[3];
11676 printf_filtered ("Remote Threadlist test\n");
11677 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11678 &result_count
, &threadlist
[0]))
11679 printf_filtered ("FAIL: threadlist test\n");
11682 threadref
*scan
= threadlist
;
11683 threadref
*limit
= scan
+ result_count
;
11685 while (scan
< limit
)
11686 output_threadid (" thread ", scan
++);
11691 display_thread_info (struct gdb_ext_thread_info
*info
)
11693 output_threadid ("Threadid: ", &info
->threadid
);
11694 printf_filtered ("Name: %s\n ", info
->shortname
);
11695 printf_filtered ("State: %s\n", info
->display
);
11696 printf_filtered ("other: %s\n\n", info
->more_display
);
11700 get_and_display_threadinfo (threadref
*ref
)
11704 struct gdb_ext_thread_info threadinfo
;
11706 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11707 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11708 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11709 display_thread_info (&threadinfo
);
11714 threadinfo_test_cmd (const char *cmd
, int tty
)
11716 int athread
= SAMPLE_THREAD
;
11720 int_to_threadref (&thread
, athread
);
11721 printf_filtered ("Remote Threadinfo test\n");
11722 if (!get_and_display_threadinfo (&thread
))
11723 printf_filtered ("FAIL cannot get thread info\n");
11727 thread_display_step (threadref
*ref
, void *context
)
11729 /* output_threadid(" threadstep ",ref); *//* simple test */
11730 return get_and_display_threadinfo (ref
);
11734 threadlist_update_test_cmd (const char *cmd
, int tty
)
11736 printf_filtered ("Remote Threadlist update test\n");
11737 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11741 init_remote_threadtests (void)
11743 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11744 _("Fetch and print the remote list of "
11745 "thread identifiers, one pkt only."));
11746 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11747 _("Fetch and display info about one thread."));
11748 add_com ("tset", class_obscure
, threadset_test_cmd
,
11749 _("Test setting to a different thread."));
11750 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11751 _("Iterate through updating all remote thread info."));
11752 add_com ("talive", class_obscure
, threadalive_test
,
11753 _("Remote thread alive test."));
11758 /* Convert a thread ID to a string. */
11761 remote_target::pid_to_str (ptid_t ptid
)
11763 struct remote_state
*rs
= get_remote_state ();
11765 if (ptid
== null_ptid
)
11766 return normal_pid_to_str (ptid
);
11767 else if (ptid
.is_pid ())
11769 /* Printing an inferior target id. */
11771 /* When multi-process extensions are off, there's no way in the
11772 remote protocol to know the remote process id, if there's any
11773 at all. There's one exception --- when we're connected with
11774 target extended-remote, and we manually attached to a process
11775 with "attach PID". We don't record anywhere a flag that
11776 allows us to distinguish that case from the case of
11777 connecting with extended-remote and the stub already being
11778 attached to a process, and reporting yes to qAttached, hence
11779 no smart special casing here. */
11780 if (!remote_multi_process_p (rs
))
11781 return "Remote target";
11783 return normal_pid_to_str (ptid
);
11787 if (magic_null_ptid
== ptid
)
11788 return "Thread <main>";
11789 else if (remote_multi_process_p (rs
))
11790 if (ptid
.lwp () == 0)
11791 return normal_pid_to_str (ptid
);
11793 return string_printf ("Thread %d.%ld",
11794 ptid
.pid (), ptid
.lwp ());
11796 return string_printf ("Thread %ld", ptid
.lwp ());
11800 /* Get the address of the thread local variable in OBJFILE which is
11801 stored at OFFSET within the thread local storage for thread PTID. */
11804 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11807 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11809 struct remote_state
*rs
= get_remote_state ();
11810 char *p
= rs
->buf
.data ();
11811 char *endp
= p
+ get_remote_packet_size ();
11812 enum packet_result result
;
11814 strcpy (p
, "qGetTLSAddr:");
11816 p
= write_ptid (p
, endp
, ptid
);
11818 p
+= hexnumstr (p
, offset
);
11820 p
+= hexnumstr (p
, lm
);
11824 getpkt (&rs
->buf
, 0);
11825 result
= packet_ok (rs
->buf
,
11826 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11827 if (result
== PACKET_OK
)
11831 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11834 else if (result
== PACKET_UNKNOWN
)
11835 throw_error (TLS_GENERIC_ERROR
,
11836 _("Remote target doesn't support qGetTLSAddr packet"));
11838 throw_error (TLS_GENERIC_ERROR
,
11839 _("Remote target failed to process qGetTLSAddr request"));
11842 throw_error (TLS_GENERIC_ERROR
,
11843 _("TLS not supported or disabled on this target"));
11848 /* Provide thread local base, i.e. Thread Information Block address.
11849 Returns 1 if ptid is found and thread_local_base is non zero. */
11852 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11854 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11856 struct remote_state
*rs
= get_remote_state ();
11857 char *p
= rs
->buf
.data ();
11858 char *endp
= p
+ get_remote_packet_size ();
11859 enum packet_result result
;
11861 strcpy (p
, "qGetTIBAddr:");
11863 p
= write_ptid (p
, endp
, ptid
);
11867 getpkt (&rs
->buf
, 0);
11868 result
= packet_ok (rs
->buf
,
11869 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11870 if (result
== PACKET_OK
)
11873 unpack_varlen_hex (rs
->buf
.data (), &val
);
11875 *addr
= (CORE_ADDR
) val
;
11878 else if (result
== PACKET_UNKNOWN
)
11879 error (_("Remote target doesn't support qGetTIBAddr packet"));
11881 error (_("Remote target failed to process qGetTIBAddr request"));
11884 error (_("qGetTIBAddr not supported or disabled on this target"));
11889 /* Support for inferring a target description based on the current
11890 architecture and the size of a 'g' packet. While the 'g' packet
11891 can have any size (since optional registers can be left off the
11892 end), some sizes are easily recognizable given knowledge of the
11893 approximate architecture. */
11895 struct remote_g_packet_guess
11897 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11904 const struct target_desc
*tdesc
;
11907 struct remote_g_packet_data
: public allocate_on_obstack
11909 std::vector
<remote_g_packet_guess
> guesses
;
11912 static struct gdbarch_data
*remote_g_packet_data_handle
;
11915 remote_g_packet_data_init (struct obstack
*obstack
)
11917 return new (obstack
) remote_g_packet_data
;
11921 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11922 const struct target_desc
*tdesc
)
11924 struct remote_g_packet_data
*data
11925 = ((struct remote_g_packet_data
*)
11926 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11928 gdb_assert (tdesc
!= NULL
);
11930 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11931 if (guess
.bytes
== bytes
)
11932 internal_error (__FILE__
, __LINE__
,
11933 _("Duplicate g packet description added for size %d"),
11936 data
->guesses
.emplace_back (bytes
, tdesc
);
11939 /* Return true if remote_read_description would do anything on this target
11940 and architecture, false otherwise. */
11943 remote_read_description_p (struct target_ops
*target
)
11945 struct remote_g_packet_data
*data
11946 = ((struct remote_g_packet_data
*)
11947 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11949 return !data
->guesses
.empty ();
11952 const struct target_desc
*
11953 remote_target::read_description ()
11955 struct remote_g_packet_data
*data
11956 = ((struct remote_g_packet_data
*)
11957 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11959 /* Do not try this during initial connection, when we do not know
11960 whether there is a running but stopped thread. */
11961 if (!target_has_execution () || inferior_ptid
== null_ptid
)
11962 return beneath ()->read_description ();
11964 if (!data
->guesses
.empty ())
11966 int bytes
= send_g_packet ();
11968 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11969 if (guess
.bytes
== bytes
)
11970 return guess
.tdesc
;
11972 /* We discard the g packet. A minor optimization would be to
11973 hold on to it, and fill the register cache once we have selected
11974 an architecture, but it's too tricky to do safely. */
11977 return beneath ()->read_description ();
11980 /* Remote file transfer support. This is host-initiated I/O, not
11981 target-initiated; for target-initiated, see remote-fileio.c. */
11983 /* If *LEFT is at least the length of STRING, copy STRING to
11984 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11985 decrease *LEFT. Otherwise raise an error. */
11988 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11990 int len
= strlen (string
);
11993 error (_("Packet too long for target."));
11995 memcpy (*buffer
, string
, len
);
11999 /* NUL-terminate the buffer as a convenience, if there is
12005 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
12006 *BUFFER, update *BUFFER to point to the new end of the buffer, and
12007 decrease *LEFT. Otherwise raise an error. */
12010 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
12013 if (2 * len
> *left
)
12014 error (_("Packet too long for target."));
12016 bin2hex (bytes
, *buffer
, len
);
12017 *buffer
+= 2 * len
;
12020 /* NUL-terminate the buffer as a convenience, if there is
12026 /* If *LEFT is large enough, convert VALUE to hex and add it to
12027 *BUFFER, update *BUFFER to point to the new end of the buffer, and
12028 decrease *LEFT. Otherwise raise an error. */
12031 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
12033 int len
= hexnumlen (value
);
12036 error (_("Packet too long for target."));
12038 hexnumstr (*buffer
, value
);
12042 /* NUL-terminate the buffer as a convenience, if there is
12048 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
12049 value, *REMOTE_ERRNO to the remote error number or zero if none
12050 was included, and *ATTACHMENT to point to the start of the annex
12051 if any. The length of the packet isn't needed here; there may
12052 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
12054 Return 0 if the packet could be parsed, -1 if it could not. If
12055 -1 is returned, the other variables may not be initialized. */
12058 remote_hostio_parse_result (const char *buffer
, int *retcode
,
12059 int *remote_errno
, const char **attachment
)
12064 *attachment
= NULL
;
12066 if (buffer
[0] != 'F')
12070 *retcode
= strtol (&buffer
[1], &p
, 16);
12071 if (errno
!= 0 || p
== &buffer
[1])
12074 /* Check for ",errno". */
12078 *remote_errno
= strtol (p
+ 1, &p2
, 16);
12079 if (errno
!= 0 || p
+ 1 == p2
)
12084 /* Check for ";attachment". If there is no attachment, the
12085 packet should end here. */
12088 *attachment
= p
+ 1;
12091 else if (*p
== '\0')
12097 /* Send a prepared I/O packet to the target and read its response.
12098 The prepared packet is in the global RS->BUF before this function
12099 is called, and the answer is there when we return.
12101 COMMAND_BYTES is the length of the request to send, which may include
12102 binary data. WHICH_PACKET is the packet configuration to check
12103 before attempting a packet. If an error occurs, *REMOTE_ERRNO
12104 is set to the error number and -1 is returned. Otherwise the value
12105 returned by the function is returned.
12107 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
12108 attachment is expected; an error will be reported if there's a
12109 mismatch. If one is found, *ATTACHMENT will be set to point into
12110 the packet buffer and *ATTACHMENT_LEN will be set to the
12111 attachment's length. */
12114 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
12115 int *remote_errno
, const char **attachment
,
12116 int *attachment_len
)
12118 struct remote_state
*rs
= get_remote_state ();
12119 int ret
, bytes_read
;
12120 const char *attachment_tmp
;
12122 if (packet_support (which_packet
) == PACKET_DISABLE
)
12124 *remote_errno
= FILEIO_ENOSYS
;
12128 putpkt_binary (rs
->buf
.data (), command_bytes
);
12129 bytes_read
= getpkt_sane (&rs
->buf
, 0);
12131 /* If it timed out, something is wrong. Don't try to parse the
12133 if (bytes_read
< 0)
12135 *remote_errno
= FILEIO_EINVAL
;
12139 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
12142 *remote_errno
= FILEIO_EINVAL
;
12144 case PACKET_UNKNOWN
:
12145 *remote_errno
= FILEIO_ENOSYS
;
12151 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
12154 *remote_errno
= FILEIO_EINVAL
;
12158 /* Make sure we saw an attachment if and only if we expected one. */
12159 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
12160 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
12162 *remote_errno
= FILEIO_EINVAL
;
12166 /* If an attachment was found, it must point into the packet buffer;
12167 work out how many bytes there were. */
12168 if (attachment_tmp
!= NULL
)
12170 *attachment
= attachment_tmp
;
12171 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
12177 /* See declaration.h. */
12180 readahead_cache::invalidate ()
12185 /* See declaration.h. */
12188 readahead_cache::invalidate_fd (int fd
)
12190 if (this->fd
== fd
)
12194 /* Set the filesystem remote_hostio functions that take FILENAME
12195 arguments will use. Return 0 on success, or -1 if an error
12196 occurs (and set *REMOTE_ERRNO). */
12199 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
12202 struct remote_state
*rs
= get_remote_state ();
12203 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
12204 char *p
= rs
->buf
.data ();
12205 int left
= get_remote_packet_size () - 1;
12209 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12212 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
12215 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
12217 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
12218 remote_buffer_add_string (&p
, &left
, arg
);
12220 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
12221 remote_errno
, NULL
, NULL
);
12223 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12227 rs
->fs_pid
= required_pid
;
12232 /* Implementation of to_fileio_open. */
12235 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
12236 int flags
, int mode
, int warn_if_slow
,
12239 struct remote_state
*rs
= get_remote_state ();
12240 char *p
= rs
->buf
.data ();
12241 int left
= get_remote_packet_size () - 1;
12245 static int warning_issued
= 0;
12247 printf_unfiltered (_("Reading %s from remote target...\n"),
12250 if (!warning_issued
)
12252 warning (_("File transfers from remote targets can be slow."
12253 " Use \"set sysroot\" to access files locally"
12255 warning_issued
= 1;
12259 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12262 remote_buffer_add_string (&p
, &left
, "vFile:open:");
12264 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12265 strlen (filename
));
12266 remote_buffer_add_string (&p
, &left
, ",");
12268 remote_buffer_add_int (&p
, &left
, flags
);
12269 remote_buffer_add_string (&p
, &left
, ",");
12271 remote_buffer_add_int (&p
, &left
, mode
);
12273 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
12274 remote_errno
, NULL
, NULL
);
12278 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
12279 int flags
, int mode
, int warn_if_slow
,
12282 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
12286 /* Implementation of to_fileio_pwrite. */
12289 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12290 ULONGEST offset
, int *remote_errno
)
12292 struct remote_state
*rs
= get_remote_state ();
12293 char *p
= rs
->buf
.data ();
12294 int left
= get_remote_packet_size ();
12297 rs
->readahead_cache
.invalidate_fd (fd
);
12299 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
12301 remote_buffer_add_int (&p
, &left
, fd
);
12302 remote_buffer_add_string (&p
, &left
, ",");
12304 remote_buffer_add_int (&p
, &left
, offset
);
12305 remote_buffer_add_string (&p
, &left
, ",");
12307 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
12308 (get_remote_packet_size ()
12309 - (p
- rs
->buf
.data ())));
12311 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
12312 remote_errno
, NULL
, NULL
);
12316 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12317 ULONGEST offset
, int *remote_errno
)
12319 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12322 /* Helper for the implementation of to_fileio_pread. Read the file
12323 from the remote side with vFile:pread. */
12326 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12327 ULONGEST offset
, int *remote_errno
)
12329 struct remote_state
*rs
= get_remote_state ();
12330 char *p
= rs
->buf
.data ();
12331 const char *attachment
;
12332 int left
= get_remote_packet_size ();
12333 int ret
, attachment_len
;
12336 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12338 remote_buffer_add_int (&p
, &left
, fd
);
12339 remote_buffer_add_string (&p
, &left
, ",");
12341 remote_buffer_add_int (&p
, &left
, len
);
12342 remote_buffer_add_string (&p
, &left
, ",");
12344 remote_buffer_add_int (&p
, &left
, offset
);
12346 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
12347 remote_errno
, &attachment
,
12353 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12355 if (read_len
!= ret
)
12356 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12361 /* See declaration.h. */
12364 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12368 && this->offset
<= offset
12369 && offset
< this->offset
+ this->bufsize
)
12371 ULONGEST max
= this->offset
+ this->bufsize
;
12373 if (offset
+ len
> max
)
12374 len
= max
- offset
;
12376 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12383 /* Implementation of to_fileio_pread. */
12386 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12387 ULONGEST offset
, int *remote_errno
)
12390 struct remote_state
*rs
= get_remote_state ();
12391 readahead_cache
*cache
= &rs
->readahead_cache
;
12393 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12396 cache
->hit_count
++;
12398 remote_debug_printf ("readahead cache hit %s",
12399 pulongest (cache
->hit_count
));
12403 cache
->miss_count
++;
12405 remote_debug_printf ("readahead cache miss %s",
12406 pulongest (cache
->miss_count
));
12409 cache
->offset
= offset
;
12410 cache
->bufsize
= get_remote_packet_size ();
12411 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12413 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12414 cache
->offset
, remote_errno
);
12417 cache
->invalidate_fd (fd
);
12421 cache
->bufsize
= ret
;
12422 return cache
->pread (fd
, read_buf
, len
, offset
);
12426 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12427 ULONGEST offset
, int *remote_errno
)
12429 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12432 /* Implementation of to_fileio_close. */
12435 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12437 struct remote_state
*rs
= get_remote_state ();
12438 char *p
= rs
->buf
.data ();
12439 int left
= get_remote_packet_size () - 1;
12441 rs
->readahead_cache
.invalidate_fd (fd
);
12443 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12445 remote_buffer_add_int (&p
, &left
, fd
);
12447 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12448 remote_errno
, NULL
, NULL
);
12452 remote_target::fileio_close (int fd
, int *remote_errno
)
12454 return remote_hostio_close (fd
, remote_errno
);
12457 /* Implementation of to_fileio_unlink. */
12460 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12463 struct remote_state
*rs
= get_remote_state ();
12464 char *p
= rs
->buf
.data ();
12465 int left
= get_remote_packet_size () - 1;
12467 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12470 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12472 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12473 strlen (filename
));
12475 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12476 remote_errno
, NULL
, NULL
);
12480 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12483 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12486 /* Implementation of to_fileio_readlink. */
12488 gdb::optional
<std::string
>
12489 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12492 struct remote_state
*rs
= get_remote_state ();
12493 char *p
= rs
->buf
.data ();
12494 const char *attachment
;
12495 int left
= get_remote_packet_size ();
12496 int len
, attachment_len
;
12499 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12502 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12504 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12505 strlen (filename
));
12507 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12508 remote_errno
, &attachment
,
12514 std::string
ret (len
, '\0');
12516 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12517 (gdb_byte
*) &ret
[0], len
);
12518 if (read_len
!= len
)
12519 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12524 /* Implementation of to_fileio_fstat. */
12527 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12529 struct remote_state
*rs
= get_remote_state ();
12530 char *p
= rs
->buf
.data ();
12531 int left
= get_remote_packet_size ();
12532 int attachment_len
, ret
;
12533 const char *attachment
;
12534 struct fio_stat fst
;
12537 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12539 remote_buffer_add_int (&p
, &left
, fd
);
12541 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12542 remote_errno
, &attachment
,
12546 if (*remote_errno
!= FILEIO_ENOSYS
)
12549 /* Strictly we should return -1, ENOSYS here, but when
12550 "set sysroot remote:" was implemented in August 2008
12551 BFD's need for a stat function was sidestepped with
12552 this hack. This was not remedied until March 2015
12553 so we retain the previous behavior to avoid breaking
12556 Note that the memset is a March 2015 addition; older
12557 GDBs set st_size *and nothing else* so the structure
12558 would have garbage in all other fields. This might
12559 break something but retaining the previous behavior
12560 here would be just too wrong. */
12562 memset (st
, 0, sizeof (struct stat
));
12563 st
->st_size
= INT_MAX
;
12567 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12568 (gdb_byte
*) &fst
, sizeof (fst
));
12570 if (read_len
!= ret
)
12571 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12573 if (read_len
!= sizeof (fst
))
12574 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12575 read_len
, (int) sizeof (fst
));
12577 remote_fileio_to_host_stat (&fst
, st
);
12582 /* Implementation of to_filesystem_is_local. */
12585 remote_target::filesystem_is_local ()
12587 /* Valgrind GDB presents itself as a remote target but works
12588 on the local filesystem: it does not implement remote get
12589 and users are not expected to set a sysroot. To handle
12590 this case we treat the remote filesystem as local if the
12591 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12592 does not support vFile:open. */
12593 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12595 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12597 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12599 int fd
, remote_errno
;
12601 /* Try opening a file to probe support. The supplied
12602 filename is irrelevant, we only care about whether
12603 the stub recognizes the packet or not. */
12604 fd
= remote_hostio_open (NULL
, "just probing",
12605 FILEIO_O_RDONLY
, 0700, 0,
12609 remote_hostio_close (fd
, &remote_errno
);
12611 ps
= packet_support (PACKET_vFile_open
);
12614 if (ps
== PACKET_DISABLE
)
12616 static int warning_issued
= 0;
12618 if (!warning_issued
)
12620 warning (_("remote target does not support file"
12621 " transfer, attempting to access files"
12622 " from local filesystem."));
12623 warning_issued
= 1;
12634 remote_fileio_errno_to_host (int errnum
)
12640 case FILEIO_ENOENT
:
12648 case FILEIO_EACCES
:
12650 case FILEIO_EFAULT
:
12654 case FILEIO_EEXIST
:
12656 case FILEIO_ENODEV
:
12658 case FILEIO_ENOTDIR
:
12660 case FILEIO_EISDIR
:
12662 case FILEIO_EINVAL
:
12664 case FILEIO_ENFILE
:
12666 case FILEIO_EMFILE
:
12670 case FILEIO_ENOSPC
:
12672 case FILEIO_ESPIPE
:
12676 case FILEIO_ENOSYS
:
12678 case FILEIO_ENAMETOOLONG
:
12679 return ENAMETOOLONG
;
12685 remote_hostio_error (int errnum
)
12687 int host_error
= remote_fileio_errno_to_host (errnum
);
12689 if (host_error
== -1)
12690 error (_("Unknown remote I/O error %d"), errnum
);
12692 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12695 /* A RAII wrapper around a remote file descriptor. */
12697 class scoped_remote_fd
12700 scoped_remote_fd (remote_target
*remote
, int fd
)
12701 : m_remote (remote
), m_fd (fd
)
12705 ~scoped_remote_fd ()
12712 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12716 /* Swallow exception before it escapes the dtor. If
12717 something goes wrong, likely the connection is gone,
12718 and there's nothing else that can be done. */
12723 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12725 /* Release ownership of the file descriptor, and return it. */
12726 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12733 /* Return the owned file descriptor. */
12734 int get () const noexcept
12740 /* The remote target. */
12741 remote_target
*m_remote
;
12743 /* The owned remote I/O file descriptor. */
12748 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12750 remote_target
*remote
= get_current_remote_target ();
12752 if (remote
== nullptr)
12753 error (_("command can only be used with remote target"));
12755 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12759 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12762 int retcode
, remote_errno
, bytes
, io_size
;
12763 int bytes_in_buffer
;
12767 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12769 perror_with_name (local_file
);
12771 scoped_remote_fd fd
12772 (this, remote_hostio_open (NULL
,
12773 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12775 0700, 0, &remote_errno
));
12776 if (fd
.get () == -1)
12777 remote_hostio_error (remote_errno
);
12779 /* Send up to this many bytes at once. They won't all fit in the
12780 remote packet limit, so we'll transfer slightly fewer. */
12781 io_size
= get_remote_packet_size ();
12782 gdb::byte_vector
buffer (io_size
);
12784 bytes_in_buffer
= 0;
12787 while (bytes_in_buffer
|| !saw_eof
)
12791 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12792 io_size
- bytes_in_buffer
,
12796 if (ferror (file
.get ()))
12797 error (_("Error reading %s."), local_file
);
12800 /* EOF. Unless there is something still in the
12801 buffer from the last iteration, we are done. */
12803 if (bytes_in_buffer
== 0)
12811 bytes
+= bytes_in_buffer
;
12812 bytes_in_buffer
= 0;
12814 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12815 offset
, &remote_errno
);
12818 remote_hostio_error (remote_errno
);
12819 else if (retcode
== 0)
12820 error (_("Remote write of %d bytes returned 0!"), bytes
);
12821 else if (retcode
< bytes
)
12823 /* Short write. Save the rest of the read data for the next
12825 bytes_in_buffer
= bytes
- retcode
;
12826 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12832 if (remote_hostio_close (fd
.release (), &remote_errno
))
12833 remote_hostio_error (remote_errno
);
12836 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12840 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12842 remote_target
*remote
= get_current_remote_target ();
12844 if (remote
== nullptr)
12845 error (_("command can only be used with remote target"));
12847 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12851 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12854 int remote_errno
, bytes
, io_size
;
12857 scoped_remote_fd fd
12858 (this, remote_hostio_open (NULL
,
12859 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12861 if (fd
.get () == -1)
12862 remote_hostio_error (remote_errno
);
12864 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12866 perror_with_name (local_file
);
12868 /* Send up to this many bytes at once. They won't all fit in the
12869 remote packet limit, so we'll transfer slightly fewer. */
12870 io_size
= get_remote_packet_size ();
12871 gdb::byte_vector
buffer (io_size
);
12876 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12879 /* Success, but no bytes, means end-of-file. */
12882 remote_hostio_error (remote_errno
);
12886 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12888 perror_with_name (local_file
);
12891 if (remote_hostio_close (fd
.release (), &remote_errno
))
12892 remote_hostio_error (remote_errno
);
12895 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12899 remote_file_delete (const char *remote_file
, int from_tty
)
12901 remote_target
*remote
= get_current_remote_target ();
12903 if (remote
== nullptr)
12904 error (_("command can only be used with remote target"));
12906 remote
->remote_file_delete (remote_file
, from_tty
);
12910 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12912 int retcode
, remote_errno
;
12914 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12916 remote_hostio_error (remote_errno
);
12919 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12923 remote_put_command (const char *args
, int from_tty
)
12926 error_no_arg (_("file to put"));
12928 gdb_argv
argv (args
);
12929 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12930 error (_("Invalid parameters to remote put"));
12932 remote_file_put (argv
[0], argv
[1], from_tty
);
12936 remote_get_command (const char *args
, int from_tty
)
12939 error_no_arg (_("file to get"));
12941 gdb_argv
argv (args
);
12942 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12943 error (_("Invalid parameters to remote get"));
12945 remote_file_get (argv
[0], argv
[1], from_tty
);
12949 remote_delete_command (const char *args
, int from_tty
)
12952 error_no_arg (_("file to delete"));
12954 gdb_argv
argv (args
);
12955 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12956 error (_("Invalid parameters to remote delete"));
12958 remote_file_delete (argv
[0], from_tty
);
12962 remote_target::can_execute_reverse ()
12964 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12965 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12972 remote_target::supports_non_stop ()
12978 remote_target::supports_disable_randomization ()
12980 /* Only supported in extended mode. */
12985 remote_target::supports_multi_process ()
12987 struct remote_state
*rs
= get_remote_state ();
12989 return remote_multi_process_p (rs
);
12993 remote_supports_cond_tracepoints ()
12995 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12999 remote_target::supports_evaluation_of_breakpoint_conditions ()
13001 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
13005 remote_supports_fast_tracepoints ()
13007 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
13011 remote_supports_static_tracepoints ()
13013 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
13017 remote_supports_install_in_trace ()
13019 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
13023 remote_target::supports_enable_disable_tracepoint ()
13025 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
13030 remote_target::supports_string_tracing ()
13032 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
13036 remote_target::can_run_breakpoint_commands ()
13038 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
13042 remote_target::trace_init ()
13044 struct remote_state
*rs
= get_remote_state ();
13047 remote_get_noisy_reply ();
13048 if (strcmp (rs
->buf
.data (), "OK") != 0)
13049 error (_("Target does not support this command."));
13052 /* Recursive routine to walk through command list including loops, and
13053 download packets for each command. */
13056 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
13057 struct command_line
*cmds
)
13059 struct remote_state
*rs
= get_remote_state ();
13060 struct command_line
*cmd
;
13062 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
13064 QUIT
; /* Allow user to bail out with ^C. */
13065 strcpy (rs
->buf
.data (), "QTDPsrc:");
13066 encode_source_string (num
, addr
, "cmd", cmd
->line
,
13067 rs
->buf
.data () + strlen (rs
->buf
.data ()),
13068 rs
->buf
.size () - strlen (rs
->buf
.data ()));
13070 remote_get_noisy_reply ();
13071 if (strcmp (rs
->buf
.data (), "OK"))
13072 warning (_("Target does not support source download."));
13074 if (cmd
->control_type
== while_control
13075 || cmd
->control_type
== while_stepping_control
)
13077 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
13079 QUIT
; /* Allow user to bail out with ^C. */
13080 strcpy (rs
->buf
.data (), "QTDPsrc:");
13081 encode_source_string (num
, addr
, "cmd", "end",
13082 rs
->buf
.data () + strlen (rs
->buf
.data ()),
13083 rs
->buf
.size () - strlen (rs
->buf
.data ()));
13085 remote_get_noisy_reply ();
13086 if (strcmp (rs
->buf
.data (), "OK"))
13087 warning (_("Target does not support source download."));
13093 remote_target::download_tracepoint (struct bp_location
*loc
)
13097 std::vector
<std::string
> tdp_actions
;
13098 std::vector
<std::string
> stepping_actions
;
13100 struct breakpoint
*b
= loc
->owner
;
13101 struct tracepoint
*t
= (struct tracepoint
*) b
;
13102 struct remote_state
*rs
= get_remote_state ();
13104 const char *err_msg
= _("Tracepoint packet too large for target.");
13107 /* We use a buffer other than rs->buf because we'll build strings
13108 across multiple statements, and other statements in between could
13110 gdb::char_vector
buf (get_remote_packet_size ());
13112 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
13114 tpaddr
= loc
->address
;
13115 strcpy (addrbuf
, phex (tpaddr
, sizeof (CORE_ADDR
)));
13116 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
13117 b
->number
, addrbuf
, /* address */
13118 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
13119 t
->step_count
, t
->pass_count
);
13121 if (ret
< 0 || ret
>= buf
.size ())
13122 error ("%s", err_msg
);
13124 /* Fast tracepoints are mostly handled by the target, but we can
13125 tell the target how big of an instruction block should be moved
13127 if (b
->type
== bp_fast_tracepoint
)
13129 /* Only test for support at download time; we may not know
13130 target capabilities at definition time. */
13131 if (remote_supports_fast_tracepoints ())
13133 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
13136 size_left
= buf
.size () - strlen (buf
.data ());
13137 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13139 gdb_insn_length (loc
->gdbarch
, tpaddr
));
13141 if (ret
< 0 || ret
>= size_left
)
13142 error ("%s", err_msg
);
13145 /* If it passed validation at definition but fails now,
13146 something is very wrong. */
13147 internal_error (__FILE__
, __LINE__
,
13148 _("Fast tracepoint not "
13149 "valid during download"));
13152 /* Fast tracepoints are functionally identical to regular
13153 tracepoints, so don't take lack of support as a reason to
13154 give up on the trace run. */
13155 warning (_("Target does not support fast tracepoints, "
13156 "downloading %d as regular tracepoint"), b
->number
);
13158 else if (b
->type
== bp_static_tracepoint
)
13160 /* Only test for support at download time; we may not know
13161 target capabilities at definition time. */
13162 if (remote_supports_static_tracepoints ())
13164 struct static_tracepoint_marker marker
;
13166 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
13168 size_left
= buf
.size () - strlen (buf
.data ());
13169 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13172 if (ret
< 0 || ret
>= size_left
)
13173 error ("%s", err_msg
);
13176 error (_("Static tracepoint not valid during download"));
13179 /* Fast tracepoints are functionally identical to regular
13180 tracepoints, so don't take lack of support as a reason
13181 to give up on the trace run. */
13182 error (_("Target does not support static tracepoints"));
13184 /* If the tracepoint has a conditional, make it into an agent
13185 expression and append to the definition. */
13188 /* Only test support at download time, we may not know target
13189 capabilities at definition time. */
13190 if (remote_supports_cond_tracepoints ())
13192 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
13195 size_left
= buf
.size () - strlen (buf
.data ());
13197 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13198 size_left
, ":X%x,", aexpr
->len
);
13200 if (ret
< 0 || ret
>= size_left
)
13201 error ("%s", err_msg
);
13203 size_left
= buf
.size () - strlen (buf
.data ());
13205 /* Two bytes to encode each aexpr byte, plus the terminating
13207 if (aexpr
->len
* 2 + 1 > size_left
)
13208 error ("%s", err_msg
);
13210 pkt
= buf
.data () + strlen (buf
.data ());
13212 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
13213 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
13217 warning (_("Target does not support conditional tracepoints, "
13218 "ignoring tp %d cond"), b
->number
);
13221 if (b
->commands
|| *default_collect
)
13223 size_left
= buf
.size () - strlen (buf
.data ());
13225 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13228 if (ret
< 0 || ret
>= size_left
)
13229 error ("%s", err_msg
);
13232 putpkt (buf
.data ());
13233 remote_get_noisy_reply ();
13234 if (strcmp (rs
->buf
.data (), "OK"))
13235 error (_("Target does not support tracepoints."));
13237 /* do_single_steps (t); */
13238 for (auto action_it
= tdp_actions
.begin ();
13239 action_it
!= tdp_actions
.end (); action_it
++)
13241 QUIT
; /* Allow user to bail out with ^C. */
13243 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
13244 || !stepping_actions
.empty ());
13246 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
13247 b
->number
, addrbuf
, /* address */
13248 action_it
->c_str (),
13249 has_more
? '-' : 0);
13251 if (ret
< 0 || ret
>= buf
.size ())
13252 error ("%s", err_msg
);
13254 putpkt (buf
.data ());
13255 remote_get_noisy_reply ();
13256 if (strcmp (rs
->buf
.data (), "OK"))
13257 error (_("Error on target while setting tracepoints."));
13260 for (auto action_it
= stepping_actions
.begin ();
13261 action_it
!= stepping_actions
.end (); action_it
++)
13263 QUIT
; /* Allow user to bail out with ^C. */
13265 bool is_first
= action_it
== stepping_actions
.begin ();
13266 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
13268 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
13269 b
->number
, addrbuf
, /* address */
13270 is_first
? "S" : "",
13271 action_it
->c_str (),
13272 has_more
? "-" : "");
13274 if (ret
< 0 || ret
>= buf
.size ())
13275 error ("%s", err_msg
);
13277 putpkt (buf
.data ());
13278 remote_get_noisy_reply ();
13279 if (strcmp (rs
->buf
.data (), "OK"))
13280 error (_("Error on target while setting tracepoints."));
13283 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
13285 if (b
->location
!= NULL
)
13287 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13289 if (ret
< 0 || ret
>= buf
.size ())
13290 error ("%s", err_msg
);
13292 encode_source_string (b
->number
, loc
->address
, "at",
13293 event_location_to_string (b
->location
.get ()),
13294 buf
.data () + strlen (buf
.data ()),
13295 buf
.size () - strlen (buf
.data ()));
13296 putpkt (buf
.data ());
13297 remote_get_noisy_reply ();
13298 if (strcmp (rs
->buf
.data (), "OK"))
13299 warning (_("Target does not support source download."));
13301 if (b
->cond_string
)
13303 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13305 if (ret
< 0 || ret
>= buf
.size ())
13306 error ("%s", err_msg
);
13308 encode_source_string (b
->number
, loc
->address
,
13309 "cond", b
->cond_string
,
13310 buf
.data () + strlen (buf
.data ()),
13311 buf
.size () - strlen (buf
.data ()));
13312 putpkt (buf
.data ());
13313 remote_get_noisy_reply ();
13314 if (strcmp (rs
->buf
.data (), "OK"))
13315 warning (_("Target does not support source download."));
13317 remote_download_command_source (b
->number
, loc
->address
,
13318 breakpoint_commands (b
));
13323 remote_target::can_download_tracepoint ()
13325 struct remote_state
*rs
= get_remote_state ();
13326 struct trace_status
*ts
;
13329 /* Don't try to install tracepoints until we've relocated our
13330 symbols, and fetched and merged the target's tracepoint list with
13332 if (rs
->starting_up
)
13335 ts
= current_trace_status ();
13336 status
= get_trace_status (ts
);
13338 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13341 /* If we are in a tracing experiment, but remote stub doesn't support
13342 installing tracepoint in trace, we have to return. */
13343 if (!remote_supports_install_in_trace ())
13351 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13353 struct remote_state
*rs
= get_remote_state ();
13356 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13357 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13359 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13360 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13361 >= get_remote_packet_size ())
13362 error (_("Trace state variable name too long for tsv definition packet"));
13363 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13366 remote_get_noisy_reply ();
13367 if (rs
->buf
[0] == '\0')
13368 error (_("Target does not support this command."));
13369 if (strcmp (rs
->buf
.data (), "OK") != 0)
13370 error (_("Error on target while downloading trace state variable."));
13374 remote_target::enable_tracepoint (struct bp_location
*location
)
13376 struct remote_state
*rs
= get_remote_state ();
13378 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13379 location
->owner
->number
,
13380 phex (location
->address
, sizeof (CORE_ADDR
)));
13382 remote_get_noisy_reply ();
13383 if (rs
->buf
[0] == '\0')
13384 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13385 if (strcmp (rs
->buf
.data (), "OK") != 0)
13386 error (_("Error on target while enabling tracepoint."));
13390 remote_target::disable_tracepoint (struct bp_location
*location
)
13392 struct remote_state
*rs
= get_remote_state ();
13394 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13395 location
->owner
->number
,
13396 phex (location
->address
, sizeof (CORE_ADDR
)));
13398 remote_get_noisy_reply ();
13399 if (rs
->buf
[0] == '\0')
13400 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13401 if (strcmp (rs
->buf
.data (), "OK") != 0)
13402 error (_("Error on target while disabling tracepoint."));
13406 remote_target::trace_set_readonly_regions ()
13409 bfd_size_type size
;
13414 if (!current_program_space
->exec_bfd ())
13415 return; /* No information to give. */
13417 struct remote_state
*rs
= get_remote_state ();
13419 strcpy (rs
->buf
.data (), "QTro");
13420 offset
= strlen (rs
->buf
.data ());
13421 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
13423 char tmp1
[40], tmp2
[40];
13426 if ((s
->flags
& SEC_LOAD
) == 0 ||
13427 /* (s->flags & SEC_CODE) == 0 || */
13428 (s
->flags
& SEC_READONLY
) == 0)
13432 vma
= bfd_section_vma (s
);
13433 size
= bfd_section_size (s
);
13434 sprintf_vma (tmp1
, vma
);
13435 sprintf_vma (tmp2
, vma
+ size
);
13436 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13437 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13439 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13441 Too many sections for read-only sections definition packet."));
13444 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13446 offset
+= sec_length
;
13451 getpkt (&rs
->buf
, 0);
13456 remote_target::trace_start ()
13458 struct remote_state
*rs
= get_remote_state ();
13460 putpkt ("QTStart");
13461 remote_get_noisy_reply ();
13462 if (rs
->buf
[0] == '\0')
13463 error (_("Target does not support this command."));
13464 if (strcmp (rs
->buf
.data (), "OK") != 0)
13465 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13469 remote_target::get_trace_status (struct trace_status
*ts
)
13471 /* Initialize it just to avoid a GCC false warning. */
13473 enum packet_result result
;
13474 struct remote_state
*rs
= get_remote_state ();
13476 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13479 /* FIXME we need to get register block size some other way. */
13480 trace_regblock_size
13481 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13483 putpkt ("qTStatus");
13487 p
= remote_get_noisy_reply ();
13489 catch (const gdb_exception_error
&ex
)
13491 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13493 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13499 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13501 /* If the remote target doesn't do tracing, flag it. */
13502 if (result
== PACKET_UNKNOWN
)
13505 /* We're working with a live target. */
13506 ts
->filename
= NULL
;
13509 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13511 /* Function 'parse_trace_status' sets default value of each field of
13512 'ts' at first, so we don't have to do it here. */
13513 parse_trace_status (p
, ts
);
13515 return ts
->running
;
13519 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13520 struct uploaded_tp
*utp
)
13522 struct remote_state
*rs
= get_remote_state ();
13524 struct bp_location
*loc
;
13525 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13526 size_t size
= get_remote_packet_size ();
13531 tp
->traceframe_usage
= 0;
13532 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
13534 /* If the tracepoint was never downloaded, don't go asking for
13536 if (tp
->number_on_target
== 0)
13538 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13539 phex_nz (loc
->address
, 0));
13541 reply
= remote_get_noisy_reply ();
13542 if (reply
&& *reply
)
13545 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13551 utp
->hit_count
= 0;
13552 utp
->traceframe_usage
= 0;
13553 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13554 phex_nz (utp
->addr
, 0));
13556 reply
= remote_get_noisy_reply ();
13557 if (reply
&& *reply
)
13560 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13566 remote_target::trace_stop ()
13568 struct remote_state
*rs
= get_remote_state ();
13571 remote_get_noisy_reply ();
13572 if (rs
->buf
[0] == '\0')
13573 error (_("Target does not support this command."));
13574 if (strcmp (rs
->buf
.data (), "OK") != 0)
13575 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13579 remote_target::trace_find (enum trace_find_type type
, int num
,
13580 CORE_ADDR addr1
, CORE_ADDR addr2
,
13583 struct remote_state
*rs
= get_remote_state ();
13584 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13586 int target_frameno
= -1, target_tracept
= -1;
13588 /* Lookups other than by absolute frame number depend on the current
13589 trace selected, so make sure it is correct on the remote end
13591 if (type
!= tfind_number
)
13592 set_remote_traceframe ();
13594 p
= rs
->buf
.data ();
13595 strcpy (p
, "QTFrame:");
13596 p
= strchr (p
, '\0');
13600 xsnprintf (p
, endbuf
- p
, "%x", num
);
13603 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13606 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13609 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13610 phex_nz (addr2
, 0));
13612 case tfind_outside
:
13613 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13614 phex_nz (addr2
, 0));
13617 error (_("Unknown trace find type %d"), type
);
13621 reply
= remote_get_noisy_reply ();
13622 if (*reply
== '\0')
13623 error (_("Target does not support this command."));
13625 while (reply
&& *reply
)
13630 target_frameno
= (int) strtol (p
, &reply
, 16);
13632 error (_("Unable to parse trace frame number"));
13633 /* Don't update our remote traceframe number cache on failure
13634 to select a remote traceframe. */
13635 if (target_frameno
== -1)
13640 target_tracept
= (int) strtol (p
, &reply
, 16);
13642 error (_("Unable to parse tracepoint number"));
13644 case 'O': /* "OK"? */
13645 if (reply
[1] == 'K' && reply
[2] == '\0')
13648 error (_("Bogus reply from target: %s"), reply
);
13651 error (_("Bogus reply from target: %s"), reply
);
13654 *tpp
= target_tracept
;
13656 rs
->remote_traceframe_number
= target_frameno
;
13657 return target_frameno
;
13661 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13663 struct remote_state
*rs
= get_remote_state ();
13667 set_remote_traceframe ();
13669 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13671 reply
= remote_get_noisy_reply ();
13672 if (reply
&& *reply
)
13676 unpack_varlen_hex (reply
+ 1, &uval
);
13677 *val
= (LONGEST
) uval
;
13685 remote_target::save_trace_data (const char *filename
)
13687 struct remote_state
*rs
= get_remote_state ();
13690 p
= rs
->buf
.data ();
13691 strcpy (p
, "QTSave:");
13693 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13694 >= get_remote_packet_size ())
13695 error (_("Remote file name too long for trace save packet"));
13696 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13699 reply
= remote_get_noisy_reply ();
13700 if (*reply
== '\0')
13701 error (_("Target does not support this command."));
13702 if (strcmp (reply
, "OK") != 0)
13703 error (_("Bogus reply from target: %s"), reply
);
13707 /* This is basically a memory transfer, but needs to be its own packet
13708 because we don't know how the target actually organizes its trace
13709 memory, plus we want to be able to ask for as much as possible, but
13710 not be unhappy if we don't get as much as we ask for. */
13713 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13715 struct remote_state
*rs
= get_remote_state ();
13720 p
= rs
->buf
.data ();
13721 strcpy (p
, "qTBuffer:");
13723 p
+= hexnumstr (p
, offset
);
13725 p
+= hexnumstr (p
, len
);
13729 reply
= remote_get_noisy_reply ();
13730 if (reply
&& *reply
)
13732 /* 'l' by itself means we're at the end of the buffer and
13733 there is nothing more to get. */
13737 /* Convert the reply into binary. Limit the number of bytes to
13738 convert according to our passed-in buffer size, rather than
13739 what was returned in the packet; if the target is
13740 unexpectedly generous and gives us a bigger reply than we
13741 asked for, we don't want to crash. */
13742 rslt
= hex2bin (reply
, buf
, len
);
13746 /* Something went wrong, flag as an error. */
13751 remote_target::set_disconnected_tracing (int val
)
13753 struct remote_state
*rs
= get_remote_state ();
13755 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13759 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13760 "QTDisconnected:%x", val
);
13762 reply
= remote_get_noisy_reply ();
13763 if (*reply
== '\0')
13764 error (_("Target does not support this command."));
13765 if (strcmp (reply
, "OK") != 0)
13766 error (_("Bogus reply from target: %s"), reply
);
13769 warning (_("Target does not support disconnected tracing."));
13773 remote_target::core_of_thread (ptid_t ptid
)
13775 thread_info
*info
= find_thread_ptid (this, ptid
);
13777 if (info
!= NULL
&& info
->priv
!= NULL
)
13778 return get_remote_thread_info (info
)->core
;
13784 remote_target::set_circular_trace_buffer (int val
)
13786 struct remote_state
*rs
= get_remote_state ();
13789 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13790 "QTBuffer:circular:%x", val
);
13792 reply
= remote_get_noisy_reply ();
13793 if (*reply
== '\0')
13794 error (_("Target does not support this command."));
13795 if (strcmp (reply
, "OK") != 0)
13796 error (_("Bogus reply from target: %s"), reply
);
13800 remote_target::traceframe_info ()
13802 gdb::optional
<gdb::char_vector
> text
13803 = target_read_stralloc (current_inferior ()->top_target (),
13804 TARGET_OBJECT_TRACEFRAME_INFO
,
13807 return parse_traceframe_info (text
->data ());
13812 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13813 instruction on which a fast tracepoint may be placed. Returns -1
13814 if the packet is not supported, and 0 if the minimum instruction
13815 length is unknown. */
13818 remote_target::get_min_fast_tracepoint_insn_len ()
13820 struct remote_state
*rs
= get_remote_state ();
13823 /* If we're not debugging a process yet, the IPA can't be
13825 if (!target_has_execution ())
13828 /* Make sure the remote is pointing at the right process. */
13829 set_general_process ();
13831 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13833 reply
= remote_get_noisy_reply ();
13834 if (*reply
== '\0')
13838 ULONGEST min_insn_len
;
13840 unpack_varlen_hex (reply
, &min_insn_len
);
13842 return (int) min_insn_len
;
13847 remote_target::set_trace_buffer_size (LONGEST val
)
13849 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13851 struct remote_state
*rs
= get_remote_state ();
13852 char *buf
= rs
->buf
.data ();
13853 char *endbuf
= buf
+ get_remote_packet_size ();
13854 enum packet_result result
;
13856 gdb_assert (val
>= 0 || val
== -1);
13857 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13858 /* Send -1 as literal "-1" to avoid host size dependency. */
13862 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13865 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13868 remote_get_noisy_reply ();
13869 result
= packet_ok (rs
->buf
,
13870 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13872 if (result
!= PACKET_OK
)
13873 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13878 remote_target::set_trace_notes (const char *user
, const char *notes
,
13879 const char *stop_notes
)
13881 struct remote_state
*rs
= get_remote_state ();
13883 char *buf
= rs
->buf
.data ();
13884 char *endbuf
= buf
+ get_remote_packet_size ();
13887 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13890 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13891 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13897 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13898 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13904 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13905 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13909 /* Ensure the buffer is terminated. */
13913 reply
= remote_get_noisy_reply ();
13914 if (*reply
== '\0')
13917 if (strcmp (reply
, "OK") != 0)
13918 error (_("Bogus reply from target: %s"), reply
);
13924 remote_target::use_agent (bool use
)
13926 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13928 struct remote_state
*rs
= get_remote_state ();
13930 /* If the stub supports QAgent. */
13931 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13933 getpkt (&rs
->buf
, 0);
13935 if (strcmp (rs
->buf
.data (), "OK") == 0)
13946 remote_target::can_use_agent ()
13948 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13951 struct btrace_target_info
13953 /* The ptid of the traced thread. */
13956 /* The obtained branch trace configuration. */
13957 struct btrace_config conf
;
13960 /* Reset our idea of our target's btrace configuration. */
13963 remote_btrace_reset (remote_state
*rs
)
13965 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13968 /* Synchronize the configuration with the target. */
13971 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13973 struct packet_config
*packet
;
13974 struct remote_state
*rs
;
13975 char *buf
, *pos
, *endbuf
;
13977 rs
= get_remote_state ();
13978 buf
= rs
->buf
.data ();
13979 endbuf
= buf
+ get_remote_packet_size ();
13981 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13982 if (packet_config_support (packet
) == PACKET_ENABLE
13983 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13986 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13990 getpkt (&rs
->buf
, 0);
13992 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13994 if (buf
[0] == 'E' && buf
[1] == '.')
13995 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13997 error (_("Failed to configure the BTS buffer size."));
14000 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
14003 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
14004 if (packet_config_support (packet
) == PACKET_ENABLE
14005 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
14008 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
14012 getpkt (&rs
->buf
, 0);
14014 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
14016 if (buf
[0] == 'E' && buf
[1] == '.')
14017 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
14019 error (_("Failed to configure the trace buffer size."));
14022 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
14026 /* Read the current thread's btrace configuration from the target and
14027 store it into CONF. */
14030 btrace_read_config (struct btrace_config
*conf
)
14032 gdb::optional
<gdb::char_vector
> xml
14033 = target_read_stralloc (current_inferior ()->top_target (),
14034 TARGET_OBJECT_BTRACE_CONF
, "");
14036 parse_xml_btrace_conf (conf
, xml
->data ());
14039 /* Maybe reopen target btrace. */
14042 remote_target::remote_btrace_maybe_reopen ()
14044 struct remote_state
*rs
= get_remote_state ();
14045 int btrace_target_pushed
= 0;
14046 #if !defined (HAVE_LIBIPT)
14050 /* Don't bother walking the entirety of the remote thread list when
14051 we know the feature isn't supported by the remote. */
14052 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
14055 scoped_restore_current_thread restore_thread
;
14057 for (thread_info
*tp
: all_non_exited_threads (this))
14059 set_general_thread (tp
->ptid
);
14061 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
14062 btrace_read_config (&rs
->btrace_config
);
14064 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
14067 #if !defined (HAVE_LIBIPT)
14068 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
14073 warning (_("Target is recording using Intel Processor Trace "
14074 "but support was disabled at compile time."));
14079 #endif /* !defined (HAVE_LIBIPT) */
14081 /* Push target, once, but before anything else happens. This way our
14082 changes to the threads will be cleaned up by unpushing the target
14083 in case btrace_read_config () throws. */
14084 if (!btrace_target_pushed
)
14086 btrace_target_pushed
= 1;
14087 record_btrace_push_target ();
14088 printf_filtered (_("Target is recording using %s.\n"),
14089 btrace_format_string (rs
->btrace_config
.format
));
14092 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
14093 tp
->btrace
.target
->ptid
= tp
->ptid
;
14094 tp
->btrace
.target
->conf
= rs
->btrace_config
;
14098 /* Enable branch tracing. */
14100 struct btrace_target_info
*
14101 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
14103 struct btrace_target_info
*tinfo
= NULL
;
14104 struct packet_config
*packet
= NULL
;
14105 struct remote_state
*rs
= get_remote_state ();
14106 char *buf
= rs
->buf
.data ();
14107 char *endbuf
= buf
+ get_remote_packet_size ();
14109 switch (conf
->format
)
14111 case BTRACE_FORMAT_BTS
:
14112 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
14115 case BTRACE_FORMAT_PT
:
14116 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
14120 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
14121 error (_("Target does not support branch tracing."));
14123 btrace_sync_conf (conf
);
14125 set_general_thread (ptid
);
14127 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14129 getpkt (&rs
->buf
, 0);
14131 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14133 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14134 error (_("Could not enable branch tracing for %s: %s"),
14135 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
14137 error (_("Could not enable branch tracing for %s."),
14138 target_pid_to_str (ptid
).c_str ());
14141 tinfo
= XCNEW (struct btrace_target_info
);
14142 tinfo
->ptid
= ptid
;
14144 /* If we fail to read the configuration, we lose some information, but the
14145 tracing itself is not impacted. */
14148 btrace_read_config (&tinfo
->conf
);
14150 catch (const gdb_exception_error
&err
)
14152 if (err
.message
!= NULL
)
14153 warning ("%s", err
.what ());
14159 /* Disable branch tracing. */
14162 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
14164 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
14165 struct remote_state
*rs
= get_remote_state ();
14166 char *buf
= rs
->buf
.data ();
14167 char *endbuf
= buf
+ get_remote_packet_size ();
14169 if (packet_config_support (packet
) != PACKET_ENABLE
)
14170 error (_("Target does not support branch tracing."));
14172 set_general_thread (tinfo
->ptid
);
14174 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14176 getpkt (&rs
->buf
, 0);
14178 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14180 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14181 error (_("Could not disable branch tracing for %s: %s"),
14182 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
14184 error (_("Could not disable branch tracing for %s."),
14185 target_pid_to_str (tinfo
->ptid
).c_str ());
14191 /* Teardown branch tracing. */
14194 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
14196 /* We must not talk to the target during teardown. */
14200 /* Read the branch trace. */
14203 remote_target::read_btrace (struct btrace_data
*btrace
,
14204 struct btrace_target_info
*tinfo
,
14205 enum btrace_read_type type
)
14207 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
14210 if (packet_config_support (packet
) != PACKET_ENABLE
)
14211 error (_("Target does not support branch tracing."));
14213 #if !defined(HAVE_LIBEXPAT)
14214 error (_("Cannot process branch tracing result. XML parsing not supported."));
14219 case BTRACE_READ_ALL
:
14222 case BTRACE_READ_NEW
:
14225 case BTRACE_READ_DELTA
:
14229 internal_error (__FILE__
, __LINE__
,
14230 _("Bad branch tracing read type: %u."),
14231 (unsigned int) type
);
14234 gdb::optional
<gdb::char_vector
> xml
14235 = target_read_stralloc (current_inferior ()->top_target (),
14236 TARGET_OBJECT_BTRACE
, annex
);
14238 return BTRACE_ERR_UNKNOWN
;
14240 parse_xml_btrace (btrace
, xml
->data ());
14242 return BTRACE_ERR_NONE
;
14245 const struct btrace_config
*
14246 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
14248 return &tinfo
->conf
;
14252 remote_target::augmented_libraries_svr4_read ()
14254 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
14258 /* Implementation of to_load. */
14261 remote_target::load (const char *name
, int from_tty
)
14263 generic_load (name
, from_tty
);
14266 /* Accepts an integer PID; returns a string representing a file that
14267 can be opened on the remote side to get the symbols for the child
14268 process. Returns NULL if the operation is not supported. */
14271 remote_target::pid_to_exec_file (int pid
)
14273 static gdb::optional
<gdb::char_vector
> filename
;
14274 char *annex
= NULL
;
14276 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
14279 inferior
*inf
= find_inferior_pid (this, pid
);
14281 internal_error (__FILE__
, __LINE__
,
14282 _("not currently attached to process %d"), pid
);
14284 if (!inf
->fake_pid_p
)
14286 const int annex_size
= 9;
14288 annex
= (char *) alloca (annex_size
);
14289 xsnprintf (annex
, annex_size
, "%x", pid
);
14292 filename
= target_read_stralloc (current_inferior ()->top_target (),
14293 TARGET_OBJECT_EXEC_FILE
, annex
);
14295 return filename
? filename
->data () : nullptr;
14298 /* Implement the to_can_do_single_step target_ops method. */
14301 remote_target::can_do_single_step ()
14303 /* We can only tell whether target supports single step or not by
14304 supported s and S vCont actions if the stub supports vContSupported
14305 feature. If the stub doesn't support vContSupported feature,
14306 we have conservatively to think target doesn't supports single
14308 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
14310 struct remote_state
*rs
= get_remote_state ();
14312 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14313 remote_vcont_probe ();
14315 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14321 /* Implementation of the to_execution_direction method for the remote
14324 enum exec_direction_kind
14325 remote_target::execution_direction ()
14327 struct remote_state
*rs
= get_remote_state ();
14329 return rs
->last_resume_exec_dir
;
14332 /* Return pointer to the thread_info struct which corresponds to
14333 THREAD_HANDLE (having length HANDLE_LEN). */
14336 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14340 for (thread_info
*tp
: all_non_exited_threads (this))
14342 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14344 if (tp
->inf
== inf
&& priv
!= NULL
)
14346 if (handle_len
!= priv
->thread_handle
.size ())
14347 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14348 handle_len
, priv
->thread_handle
.size ());
14349 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14359 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14361 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14362 return priv
->thread_handle
;
14366 remote_target::can_async_p ()
14368 struct remote_state
*rs
= get_remote_state ();
14370 /* We don't go async if the user has explicitly prevented it with the
14371 "maint set target-async" command. */
14372 if (!target_async_permitted
)
14375 /* We're async whenever the serial device is. */
14376 return serial_can_async_p (rs
->remote_desc
);
14380 remote_target::is_async_p ()
14382 struct remote_state
*rs
= get_remote_state ();
14384 if (!target_async_permitted
)
14385 /* We only enable async when the user specifically asks for it. */
14388 /* We're async whenever the serial device is. */
14389 return serial_is_async_p (rs
->remote_desc
);
14392 /* Pass the SERIAL event on and up to the client. One day this code
14393 will be able to delay notifying the client of an event until the
14394 point where an entire packet has been received. */
14396 static serial_event_ftype remote_async_serial_handler
;
14399 remote_async_serial_handler (struct serial
*scb
, void *context
)
14401 /* Don't propogate error information up to the client. Instead let
14402 the client find out about the error by querying the target. */
14403 inferior_event_handler (INF_REG_EVENT
);
14407 remote_async_inferior_event_handler (gdb_client_data data
)
14409 inferior_event_handler (INF_REG_EVENT
);
14413 remote_target::async_wait_fd ()
14415 struct remote_state
*rs
= get_remote_state ();
14416 return rs
->remote_desc
->fd
;
14420 remote_target::async (int enable
)
14422 struct remote_state
*rs
= get_remote_state ();
14426 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14428 /* If there are pending events in the stop reply queue tell the
14429 event loop to process them. */
14430 if (!rs
->stop_reply_queue
.empty ())
14431 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14432 /* For simplicity, below we clear the pending events token
14433 without remembering whether it is marked, so here we always
14434 mark it. If there's actually no pending notification to
14435 process, this ends up being a no-op (other than a spurious
14436 event-loop wakeup). */
14437 if (target_is_non_stop_p ())
14438 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14442 serial_async (rs
->remote_desc
, NULL
, NULL
);
14443 /* If the core is disabling async, it doesn't want to be
14444 disturbed with target events. Clear all async event sources
14446 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14447 if (target_is_non_stop_p ())
14448 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14452 /* Implementation of the to_thread_events method. */
14455 remote_target::thread_events (int enable
)
14457 struct remote_state
*rs
= get_remote_state ();
14458 size_t size
= get_remote_packet_size ();
14460 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14463 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14465 getpkt (&rs
->buf
, 0);
14467 switch (packet_ok (rs
->buf
,
14468 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14471 if (strcmp (rs
->buf
.data (), "OK") != 0)
14472 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14475 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14477 case PACKET_UNKNOWN
:
14483 show_remote_cmd (const char *args
, int from_tty
)
14485 /* We can't just use cmd_show_list here, because we want to skip
14486 the redundant "show remote Z-packet" and the legacy aliases. */
14487 struct cmd_list_element
*list
= remote_show_cmdlist
;
14488 struct ui_out
*uiout
= current_uiout
;
14490 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14491 for (; list
!= NULL
; list
= list
->next
)
14492 if (strcmp (list
->name
, "Z-packet") == 0)
14494 else if (list
->type
== not_set_cmd
)
14495 /* Alias commands are exactly like the original, except they
14496 don't have the normal type. */
14500 ui_out_emit_tuple
option_emitter (uiout
, "option");
14502 uiout
->field_string ("name", list
->name
);
14503 uiout
->text (": ");
14504 if (list
->type
== show_cmd
)
14505 do_show_command (NULL
, from_tty
, list
);
14507 cmd_func (list
, NULL
, from_tty
);
14512 /* Function to be called whenever a new objfile (shlib) is detected. */
14514 remote_new_objfile (struct objfile
*objfile
)
14516 remote_target
*remote
= get_current_remote_target ();
14518 if (remote
!= NULL
) /* Have a remote connection. */
14519 remote
->remote_check_symbols ();
14522 /* Pull all the tracepoints defined on the target and create local
14523 data structures representing them. We don't want to create real
14524 tracepoints yet, we don't want to mess up the user's existing
14528 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14530 struct remote_state
*rs
= get_remote_state ();
14533 /* Ask for a first packet of tracepoint definition. */
14535 getpkt (&rs
->buf
, 0);
14536 p
= rs
->buf
.data ();
14537 while (*p
&& *p
!= 'l')
14539 parse_tracepoint_definition (p
, utpp
);
14540 /* Ask for another packet of tracepoint definition. */
14542 getpkt (&rs
->buf
, 0);
14543 p
= rs
->buf
.data ();
14549 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14551 struct remote_state
*rs
= get_remote_state ();
14554 /* Ask for a first packet of variable definition. */
14556 getpkt (&rs
->buf
, 0);
14557 p
= rs
->buf
.data ();
14558 while (*p
&& *p
!= 'l')
14560 parse_tsv_definition (p
, utsvp
);
14561 /* Ask for another packet of variable definition. */
14563 getpkt (&rs
->buf
, 0);
14564 p
= rs
->buf
.data ();
14569 /* The "set/show range-stepping" show hook. */
14572 show_range_stepping (struct ui_file
*file
, int from_tty
,
14573 struct cmd_list_element
*c
,
14576 fprintf_filtered (file
,
14577 _("Debugger's willingness to use range stepping "
14578 "is %s.\n"), value
);
14581 /* Return true if the vCont;r action is supported by the remote
14585 remote_target::vcont_r_supported ()
14587 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14588 remote_vcont_probe ();
14590 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14591 && get_remote_state ()->supports_vCont
.r
);
14594 /* The "set/show range-stepping" set hook. */
14597 set_range_stepping (const char *ignore_args
, int from_tty
,
14598 struct cmd_list_element
*c
)
14600 /* When enabling, check whether range stepping is actually supported
14601 by the target, and warn if not. */
14602 if (use_range_stepping
)
14604 remote_target
*remote
= get_current_remote_target ();
14606 || !remote
->vcont_r_supported ())
14607 warning (_("Range stepping is not supported by the current target"));
14612 show_remote_debug (struct ui_file
*file
, int from_tty
,
14613 struct cmd_list_element
*c
, const char *value
)
14615 fprintf_filtered (file
, _("Debugging of remote protocol is %s.\n"),
14620 show_remote_timeout (struct ui_file
*file
, int from_tty
,
14621 struct cmd_list_element
*c
, const char *value
)
14623 fprintf_filtered (file
,
14624 _("Timeout limit to wait for target to respond is %s.\n"),
14628 /* Implement the "supports_memory_tagging" target_ops method. */
14631 remote_target::supports_memory_tagging ()
14633 return remote_memory_tagging_p ();
14636 /* Create the qMemTags packet given ADDRESS, LEN and TYPE. */
14639 create_fetch_memtags_request (gdb::char_vector
&packet
, CORE_ADDR address
,
14640 size_t len
, int type
)
14642 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
14644 std::string request
= string_printf ("qMemTags:%s,%s:%s",
14645 phex_nz (address
, addr_size
),
14646 phex_nz (len
, sizeof (len
)),
14647 phex_nz (type
, sizeof (type
)));
14649 strcpy (packet
.data (), request
.c_str ());
14652 /* Parse the qMemTags packet reply into TAGS.
14654 Return true if successful, false otherwise. */
14657 parse_fetch_memtags_reply (const gdb::char_vector
&reply
,
14658 gdb::byte_vector
&tags
)
14660 if (reply
.empty () || reply
[0] == 'E' || reply
[0] != 'm')
14663 /* Copy the tag data. */
14664 tags
= hex2bin (reply
.data () + 1);
14669 /* Create the QMemTags packet given ADDRESS, LEN, TYPE and TAGS. */
14672 create_store_memtags_request (gdb::char_vector
&packet
, CORE_ADDR address
,
14673 size_t len
, int type
,
14674 const gdb::byte_vector
&tags
)
14676 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
14678 /* Put together the main packet, address and length. */
14679 std::string request
= string_printf ("QMemTags:%s,%s:%s:",
14680 phex_nz (address
, addr_size
),
14681 phex_nz (len
, sizeof (len
)),
14682 phex_nz (type
, sizeof (type
)));
14683 request
+= bin2hex (tags
.data (), tags
.size ());
14685 /* Check if we have exceeded the maximum packet size. */
14686 if (packet
.size () < request
.length ())
14687 error (_("Contents too big for packet QMemTags."));
14689 strcpy (packet
.data (), request
.c_str ());
14692 /* Implement the "fetch_memtags" target_ops method. */
14695 remote_target::fetch_memtags (CORE_ADDR address
, size_t len
,
14696 gdb::byte_vector
&tags
, int type
)
14698 /* Make sure the qMemTags packet is supported. */
14699 if (!remote_memory_tagging_p ())
14700 gdb_assert_not_reached ("remote fetch_memtags called with packet disabled");
14702 struct remote_state
*rs
= get_remote_state ();
14704 create_fetch_memtags_request (rs
->buf
, address
, len
, type
);
14707 getpkt (&rs
->buf
, 0);
14709 return parse_fetch_memtags_reply (rs
->buf
, tags
);
14712 /* Implement the "store_memtags" target_ops method. */
14715 remote_target::store_memtags (CORE_ADDR address
, size_t len
,
14716 const gdb::byte_vector
&tags
, int type
)
14718 /* Make sure the QMemTags packet is supported. */
14719 if (!remote_memory_tagging_p ())
14720 gdb_assert_not_reached ("remote store_memtags called with packet disabled");
14722 struct remote_state
*rs
= get_remote_state ();
14724 create_store_memtags_request (rs
->buf
, address
, len
, type
, tags
);
14727 getpkt (&rs
->buf
, 0);
14729 /* Verify if the request was successful. */
14730 return packet_check_result (rs
->buf
.data ()) == PACKET_OK
;
14733 /* Return true if remote target T is non-stop. */
14736 remote_target_is_non_stop_p (remote_target
*t
)
14738 scoped_restore_current_thread restore_thread
;
14739 switch_to_target_no_thread (t
);
14741 return target_is_non_stop_p ();
14746 namespace selftests
{
14749 test_memory_tagging_functions ()
14751 remote_target remote
;
14753 struct packet_config
*config
14754 = &remote_protocol_packets
[PACKET_memory_tagging_feature
];
14756 scoped_restore restore_memtag_support_
14757 = make_scoped_restore (&config
->support
);
14759 /* Test memory tagging packet support. */
14760 config
->support
= PACKET_SUPPORT_UNKNOWN
;
14761 SELF_CHECK (remote
.supports_memory_tagging () == false);
14762 config
->support
= PACKET_DISABLE
;
14763 SELF_CHECK (remote
.supports_memory_tagging () == false);
14764 config
->support
= PACKET_ENABLE
;
14765 SELF_CHECK (remote
.supports_memory_tagging () == true);
14767 /* Setup testing. */
14768 gdb::char_vector packet
;
14769 gdb::byte_vector tags
, bv
;
14770 std::string expected
, reply
;
14771 packet
.resize (32000);
14773 /* Test creating a qMemTags request. */
14775 expected
= "qMemTags:0,0:0";
14776 create_fetch_memtags_request (packet
, 0x0, 0x0, 0);
14777 SELF_CHECK (strcmp (packet
.data (), expected
.c_str ()) == 0);
14779 expected
= "qMemTags:deadbeef,10:1";
14780 create_fetch_memtags_request (packet
, 0xdeadbeef, 16, 1);
14781 SELF_CHECK (strcmp (packet
.data (), expected
.c_str ()) == 0);
14783 /* Test parsing a qMemTags reply. */
14785 /* Error reply, tags vector unmodified. */
14787 strcpy (packet
.data (), reply
.c_str ());
14789 SELF_CHECK (parse_fetch_memtags_reply (packet
, tags
) == false);
14790 SELF_CHECK (tags
.size () == 0);
14792 /* Valid reply, tags vector updated. */
14796 for (int i
= 0; i
< 5; i
++)
14799 reply
= "m" + bin2hex (bv
.data (), bv
.size ());
14800 strcpy (packet
.data (), reply
.c_str ());
14802 SELF_CHECK (parse_fetch_memtags_reply (packet
, tags
) == true);
14803 SELF_CHECK (tags
.size () == 5);
14805 for (int i
= 0; i
< 5; i
++)
14806 SELF_CHECK (tags
[i
] == i
);
14808 /* Test creating a QMemTags request. */
14810 /* Empty tag data. */
14812 expected
= "QMemTags:0,0:0:";
14813 create_store_memtags_request (packet
, 0x0, 0x0, 0, tags
);
14814 SELF_CHECK (memcmp (packet
.data (), expected
.c_str (),
14815 expected
.length ()) == 0);
14817 /* Non-empty tag data. */
14819 for (int i
= 0; i
< 5; i
++)
14820 tags
.push_back (i
);
14821 expected
= "QMemTags:deadbeef,ff:1:0001020304";
14822 create_store_memtags_request (packet
, 0xdeadbeef, 255, 1, tags
);
14823 SELF_CHECK (memcmp (packet
.data (), expected
.c_str (),
14824 expected
.length ()) == 0);
14827 } // namespace selftests
14828 #endif /* GDB_SELF_TEST */
14830 void _initialize_remote ();
14832 _initialize_remote ()
14834 struct cmd_list_element
*cmd
;
14835 const char *cmd_name
;
14837 /* architecture specific data */
14838 remote_g_packet_data_handle
=
14839 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14841 add_target (remote_target_info
, remote_target::open
);
14842 add_target (extended_remote_target_info
, extended_remote_target::open
);
14844 /* Hook into new objfile notification. */
14845 gdb::observers::new_objfile
.attach (remote_new_objfile
, "remote");
14848 init_remote_threadtests ();
14851 /* set/show remote ... */
14853 add_basic_prefix_cmd ("remote", class_maintenance
, _("\
14854 Remote protocol specific variables.\n\
14855 Configure various remote-protocol specific variables such as\n\
14856 the packets being used."),
14857 &remote_set_cmdlist
, "set remote ",
14858 0 /* allow-unknown */, &setlist
);
14859 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14860 Remote protocol specific variables.\n\
14861 Configure various remote-protocol specific variables such as\n\
14862 the packets being used."),
14863 &remote_show_cmdlist
, "show remote ",
14864 0 /* allow-unknown */, &showlist
);
14866 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14867 Compare section data on target to the exec file.\n\
14868 Argument is a single section name (default: all loaded sections).\n\
14869 To compare only read-only loaded sections, specify the -r option."),
14872 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14873 Send an arbitrary packet to a remote target.\n\
14874 maintenance packet TEXT\n\
14875 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14876 this command sends the string TEXT to the inferior, and displays the\n\
14877 response packet. GDB supplies the initial `$' character, and the\n\
14878 terminating `#' character and checksum."),
14881 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14882 Set whether to send break if interrupted."), _("\
14883 Show whether to send break if interrupted."), _("\
14884 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14885 set_remotebreak
, show_remotebreak
,
14886 &setlist
, &showlist
);
14887 cmd_name
= "remotebreak";
14888 cmd
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
14889 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14890 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14891 cmd
= lookup_cmd (&cmd_name
, showlist
, "", NULL
, -1, 1);
14892 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14894 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14895 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14897 Set interrupt sequence to remote target."), _("\
14898 Show interrupt sequence to remote target."), _("\
14899 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14900 NULL
, show_interrupt_sequence
,
14901 &remote_set_cmdlist
,
14902 &remote_show_cmdlist
);
14904 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14905 &interrupt_on_connect
, _("\
14906 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14907 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14908 If set, interrupt sequence is sent to remote target."),
14910 &remote_set_cmdlist
, &remote_show_cmdlist
);
14912 /* Install commands for configuring memory read/write packets. */
14914 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14915 Set the maximum number of bytes per memory write packet (deprecated)."),
14917 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14918 Show the maximum number of bytes per memory write packet (deprecated)."),
14920 add_cmd ("memory-write-packet-size", no_class
,
14921 set_memory_write_packet_size
, _("\
14922 Set the maximum number of bytes per memory-write packet.\n\
14923 Specify the number of bytes in a packet or 0 (zero) for the\n\
14924 default packet size. The actual limit is further reduced\n\
14925 dependent on the target. Specify ``fixed'' to disable the\n\
14926 further restriction and ``limit'' to enable that restriction."),
14927 &remote_set_cmdlist
);
14928 add_cmd ("memory-read-packet-size", no_class
,
14929 set_memory_read_packet_size
, _("\
14930 Set the maximum number of bytes per memory-read packet.\n\
14931 Specify the number of bytes in a packet or 0 (zero) for the\n\
14932 default packet size. The actual limit is further reduced\n\
14933 dependent on the target. Specify ``fixed'' to disable the\n\
14934 further restriction and ``limit'' to enable that restriction."),
14935 &remote_set_cmdlist
);
14936 add_cmd ("memory-write-packet-size", no_class
,
14937 show_memory_write_packet_size
,
14938 _("Show the maximum number of bytes per memory-write packet."),
14939 &remote_show_cmdlist
);
14940 add_cmd ("memory-read-packet-size", no_class
,
14941 show_memory_read_packet_size
,
14942 _("Show the maximum number of bytes per memory-read packet."),
14943 &remote_show_cmdlist
);
14945 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14946 &remote_hw_watchpoint_limit
, _("\
14947 Set the maximum number of target hardware watchpoints."), _("\
14948 Show the maximum number of target hardware watchpoints."), _("\
14949 Specify \"unlimited\" for unlimited hardware watchpoints."),
14950 NULL
, show_hardware_watchpoint_limit
,
14951 &remote_set_cmdlist
,
14952 &remote_show_cmdlist
);
14953 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14955 &remote_hw_watchpoint_length_limit
, _("\
14956 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14957 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14958 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14959 NULL
, show_hardware_watchpoint_length_limit
,
14960 &remote_set_cmdlist
, &remote_show_cmdlist
);
14961 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14962 &remote_hw_breakpoint_limit
, _("\
14963 Set the maximum number of target hardware breakpoints."), _("\
14964 Show the maximum number of target hardware breakpoints."), _("\
14965 Specify \"unlimited\" for unlimited hardware breakpoints."),
14966 NULL
, show_hardware_breakpoint_limit
,
14967 &remote_set_cmdlist
, &remote_show_cmdlist
);
14969 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14970 &remote_address_size
, _("\
14971 Set the maximum size of the address (in bits) in a memory packet."), _("\
14972 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14974 NULL
, /* FIXME: i18n: */
14975 &setlist
, &showlist
);
14977 init_all_packet_configs ();
14979 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14980 "X", "binary-download", 1);
14982 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14983 "vCont", "verbose-resume", 0);
14985 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14986 "QPassSignals", "pass-signals", 0);
14988 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14989 "QCatchSyscalls", "catch-syscalls", 0);
14991 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14992 "QProgramSignals", "program-signals", 0);
14994 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14995 "QSetWorkingDir", "set-working-dir", 0);
14997 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14998 "QStartupWithShell", "startup-with-shell", 0);
15000 add_packet_config_cmd (&remote_protocol_packets
15001 [PACKET_QEnvironmentHexEncoded
],
15002 "QEnvironmentHexEncoded", "environment-hex-encoded",
15005 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
15006 "QEnvironmentReset", "environment-reset",
15009 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
15010 "QEnvironmentUnset", "environment-unset",
15013 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
15014 "qSymbol", "symbol-lookup", 0);
15016 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
15017 "P", "set-register", 1);
15019 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
15020 "p", "fetch-register", 1);
15022 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
15023 "Z0", "software-breakpoint", 0);
15025 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
15026 "Z1", "hardware-breakpoint", 0);
15028 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
15029 "Z2", "write-watchpoint", 0);
15031 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
15032 "Z3", "read-watchpoint", 0);
15034 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
15035 "Z4", "access-watchpoint", 0);
15037 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
15038 "qXfer:auxv:read", "read-aux-vector", 0);
15040 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
15041 "qXfer:exec-file:read", "pid-to-exec-file", 0);
15043 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
15044 "qXfer:features:read", "target-features", 0);
15046 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
15047 "qXfer:libraries:read", "library-info", 0);
15049 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
15050 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
15052 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
15053 "qXfer:memory-map:read", "memory-map", 0);
15055 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
15056 "qXfer:osdata:read", "osdata", 0);
15058 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
15059 "qXfer:threads:read", "threads", 0);
15061 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
15062 "qXfer:siginfo:read", "read-siginfo-object", 0);
15064 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
15065 "qXfer:siginfo:write", "write-siginfo-object", 0);
15067 add_packet_config_cmd
15068 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
15069 "qXfer:traceframe-info:read", "traceframe-info", 0);
15071 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
15072 "qXfer:uib:read", "unwind-info-block", 0);
15074 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
15075 "qGetTLSAddr", "get-thread-local-storage-address",
15078 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
15079 "qGetTIBAddr", "get-thread-information-block-address",
15082 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
15083 "bc", "reverse-continue", 0);
15085 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
15086 "bs", "reverse-step", 0);
15088 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
15089 "qSupported", "supported-packets", 0);
15091 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
15092 "qSearch:memory", "search-memory", 0);
15094 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
15095 "qTStatus", "trace-status", 0);
15097 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
15098 "vFile:setfs", "hostio-setfs", 0);
15100 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
15101 "vFile:open", "hostio-open", 0);
15103 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
15104 "vFile:pread", "hostio-pread", 0);
15106 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
15107 "vFile:pwrite", "hostio-pwrite", 0);
15109 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
15110 "vFile:close", "hostio-close", 0);
15112 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
15113 "vFile:unlink", "hostio-unlink", 0);
15115 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
15116 "vFile:readlink", "hostio-readlink", 0);
15118 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
15119 "vFile:fstat", "hostio-fstat", 0);
15121 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
15122 "vAttach", "attach", 0);
15124 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
15127 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
15128 "QStartNoAckMode", "noack", 0);
15130 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
15131 "vKill", "kill", 0);
15133 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
15134 "qAttached", "query-attached", 0);
15136 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
15137 "ConditionalTracepoints",
15138 "conditional-tracepoints", 0);
15140 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
15141 "ConditionalBreakpoints",
15142 "conditional-breakpoints", 0);
15144 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
15145 "BreakpointCommands",
15146 "breakpoint-commands", 0);
15148 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
15149 "FastTracepoints", "fast-tracepoints", 0);
15151 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
15152 "TracepointSource", "TracepointSource", 0);
15154 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
15155 "QAllow", "allow", 0);
15157 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
15158 "StaticTracepoints", "static-tracepoints", 0);
15160 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
15161 "InstallInTrace", "install-in-trace", 0);
15163 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
15164 "qXfer:statictrace:read", "read-sdata-object", 0);
15166 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
15167 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
15169 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
15170 "QDisableRandomization", "disable-randomization", 0);
15172 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
15173 "QAgent", "agent", 0);
15175 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
15176 "QTBuffer:size", "trace-buffer-size", 0);
15178 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
15179 "Qbtrace:off", "disable-btrace", 0);
15181 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
15182 "Qbtrace:bts", "enable-btrace-bts", 0);
15184 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
15185 "Qbtrace:pt", "enable-btrace-pt", 0);
15187 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
15188 "qXfer:btrace", "read-btrace", 0);
15190 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
15191 "qXfer:btrace-conf", "read-btrace-conf", 0);
15193 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
15194 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
15196 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
15197 "multiprocess-feature", "multiprocess-feature", 0);
15199 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
15200 "swbreak-feature", "swbreak-feature", 0);
15202 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
15203 "hwbreak-feature", "hwbreak-feature", 0);
15205 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
15206 "fork-event-feature", "fork-event-feature", 0);
15208 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
15209 "vfork-event-feature", "vfork-event-feature", 0);
15211 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
15212 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
15214 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
15215 "vContSupported", "verbose-resume-supported", 0);
15217 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
15218 "exec-event-feature", "exec-event-feature", 0);
15220 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
15221 "vCtrlC", "ctrl-c", 0);
15223 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
15224 "QThreadEvents", "thread-events", 0);
15226 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
15227 "N stop reply", "no-resumed-stop-reply", 0);
15229 add_packet_config_cmd (&remote_protocol_packets
[PACKET_memory_tagging_feature
],
15230 "memory-tagging-feature", "memory-tagging-feature", 0);
15232 /* Assert that we've registered "set remote foo-packet" commands
15233 for all packet configs. */
15237 for (i
= 0; i
< PACKET_MAX
; i
++)
15239 /* Ideally all configs would have a command associated. Some
15240 still don't though. */
15245 case PACKET_QNonStop
:
15246 case PACKET_EnableDisableTracepoints_feature
:
15247 case PACKET_tracenz_feature
:
15248 case PACKET_DisconnectedTracing_feature
:
15249 case PACKET_augmented_libraries_svr4_read_feature
:
15251 /* Additions to this list need to be well justified:
15252 pre-existing packets are OK; new packets are not. */
15260 /* This catches both forgetting to add a config command, and
15261 forgetting to remove a packet from the exception list. */
15262 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
15266 /* Keep the old ``set remote Z-packet ...'' working. Each individual
15267 Z sub-packet has its own set and show commands, but users may
15268 have sets to this variable in their .gdbinit files (or in their
15270 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
15271 &remote_Z_packet_detect
, _("\
15272 Set use of remote protocol `Z' packets."), _("\
15273 Show use of remote protocol `Z' packets."), _("\
15274 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
15276 set_remote_protocol_Z_packet_cmd
,
15277 show_remote_protocol_Z_packet_cmd
,
15278 /* FIXME: i18n: Use of remote protocol
15279 `Z' packets is %s. */
15280 &remote_set_cmdlist
, &remote_show_cmdlist
);
15282 add_basic_prefix_cmd ("remote", class_files
, _("\
15283 Manipulate files on the remote system.\n\
15284 Transfer files to and from the remote target system."),
15285 &remote_cmdlist
, "remote ",
15286 0 /* allow-unknown */, &cmdlist
);
15288 add_cmd ("put", class_files
, remote_put_command
,
15289 _("Copy a local file to the remote system."),
15292 add_cmd ("get", class_files
, remote_get_command
,
15293 _("Copy a remote file to the local system."),
15296 add_cmd ("delete", class_files
, remote_delete_command
,
15297 _("Delete a remote file."),
15300 add_setshow_string_noescape_cmd ("exec-file", class_files
,
15301 &remote_exec_file_var
, _("\
15302 Set the remote pathname for \"run\"."), _("\
15303 Show the remote pathname for \"run\"."), NULL
,
15304 set_remote_exec_file
,
15305 show_remote_exec_file
,
15306 &remote_set_cmdlist
,
15307 &remote_show_cmdlist
);
15309 add_setshow_boolean_cmd ("range-stepping", class_run
,
15310 &use_range_stepping
, _("\
15311 Enable or disable range stepping."), _("\
15312 Show whether target-assisted range stepping is enabled."), _("\
15313 If on, and the target supports it, when stepping a source line, GDB\n\
15314 tells the target to step the corresponding range of addresses itself instead\n\
15315 of issuing multiple single-steps. This speeds up source level\n\
15316 stepping. If off, GDB always issues single-steps, even if range\n\
15317 stepping is supported by the target. The default is on."),
15318 set_range_stepping
,
15319 show_range_stepping
,
15323 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
15324 Set watchdog timer."), _("\
15325 Show watchdog timer."), _("\
15326 When non-zero, this timeout is used instead of waiting forever for a target\n\
15327 to finish a low-level step or continue operation. If the specified amount\n\
15328 of time passes without a response from the target, an error occurs."),
15331 &setlist
, &showlist
);
15333 add_setshow_zuinteger_unlimited_cmd ("remote-packet-max-chars", no_class
,
15334 &remote_packet_max_chars
, _("\
15335 Set the maximum number of characters to display for each remote packet."), _("\
15336 Show the maximum number of characters to display for each remote packet."), _("\
15337 Specify \"unlimited\" to display all the characters."),
15338 NULL
, show_remote_packet_max_chars
,
15339 &setdebuglist
, &showdebuglist
);
15341 add_setshow_boolean_cmd ("remote", no_class
, &remote_debug
,
15342 _("Set debugging of remote protocol."),
15343 _("Show debugging of remote protocol."),
15345 When enabled, each packet sent or received with the remote target\n\
15349 &setdebuglist
, &showdebuglist
);
15351 add_setshow_zuinteger_unlimited_cmd ("remotetimeout", no_class
,
15352 &remote_timeout
, _("\
15353 Set timeout limit to wait for target to respond."), _("\
15354 Show timeout limit to wait for target to respond."), _("\
15355 This value is used to set the time limit for gdb to wait for a response\n\
15356 from the target."),
15358 show_remote_timeout
,
15359 &setlist
, &showlist
);
15361 /* Eventually initialize fileio. See fileio.c */
15362 initialize_remote_fileio (&remote_set_cmdlist
, &remote_show_cmdlist
);
15365 selftests::register_test ("remote_memory_tagging",
15366 selftests::test_memory_tagging_functions
);