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 (inferior
*, ptid_t
, 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
, bool 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 (bool *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
, bool 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 bool running
= target_is_non_stop_p ();
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 bool executing
= target_is_non_stop_p ();
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. */
5931 remote_target::follow_exec (inferior
*follow_inf
, ptid_t ptid
,
5932 const char *execd_pathname
)
5934 process_stratum_target::follow_exec (follow_inf
, ptid
, 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 (follow_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 /* If connected in all-stop mode, we'd send the remote resume
6638 request directly from remote_resume. Likewise if
6639 reverse-debugging, as there are no defined vCont actions for
6640 reverse execution. */
6641 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6644 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6645 instead of resuming all threads of each process individually.
6646 However, if any thread of a process must remain halted, we can't
6647 send wildcard resumes and must send one action per thread.
6649 Care must be taken to not resume threads/processes the server
6650 side already told us are stopped, but the core doesn't know about
6651 yet, because the events are still in the vStopped notification
6654 #1 => vCont s:p1.1;c
6656 #3 <= %Stopped T05 p1.1
6661 #8 (infrun handles the stop for p1.1 and continues stepping)
6662 #9 => vCont s:p1.1;c
6664 The last vCont above would resume thread p1.2 by mistake, because
6665 the server has no idea that the event for p1.2 had not been
6668 The server side must similarly ignore resume actions for the
6669 thread that has a pending %Stopped notification (and any other
6670 threads with events pending), until GDB acks the notification
6671 with vStopped. Otherwise, e.g., the following case is
6674 #1 => g (or any other packet)
6676 #3 <= %Stopped T05 p1.2
6677 #4 => vCont s:p1.1;c
6680 Above, the server must not resume thread p1.2. GDB can't know
6681 that p1.2 stopped until it acks the %Stopped notification, and
6682 since from GDB's perspective all threads should be running, it
6685 Finally, special care must also be given to handling fork/vfork
6686 events. A (v)fork event actually tells us that two processes
6687 stopped -- the parent and the child. Until we follow the fork,
6688 we must not resume the child. Therefore, if we have a pending
6689 fork follow, we must not send a global wildcard resume action
6690 (vCont;c). We can still send process-wide wildcards though. */
6692 /* Start by assuming a global wildcard (vCont;c) is possible. */
6693 bool may_global_wildcard_vcont
= true;
6695 /* And assume every process is individually wildcard-able too. */
6696 for (inferior
*inf
: all_non_exited_inferiors (this))
6698 remote_inferior
*priv
= get_remote_inferior (inf
);
6700 priv
->may_wildcard_vcont
= true;
6703 /* Check for any pending events (not reported or processed yet) and
6704 disable process and global wildcard resumes appropriately. */
6705 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6707 bool any_pending_vcont_resume
= false;
6709 for (thread_info
*tp
: all_non_exited_threads (this))
6711 remote_thread_info
*priv
= get_remote_thread_info (tp
);
6713 /* If a thread of a process is not meant to be resumed, then we
6714 can't wildcard that process. */
6715 if (priv
->get_resume_state () == resume_state::NOT_RESUMED
)
6717 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6719 /* And if we can't wildcard a process, we can't wildcard
6720 everything either. */
6721 may_global_wildcard_vcont
= false;
6725 if (priv
->get_resume_state () == resume_state::RESUMED_PENDING_VCONT
)
6726 any_pending_vcont_resume
= true;
6728 /* If a thread is the parent of an unfollowed fork, then we
6729 can't do a global wildcard, as that would resume the fork
6731 if (is_pending_fork_parent_thread (tp
))
6732 may_global_wildcard_vcont
= false;
6735 /* We didn't have any resumed thread pending a vCont resume, so nothing to
6737 if (!any_pending_vcont_resume
)
6740 /* Now let's build the vCont packet(s). Actions must be appended
6741 from narrower to wider scopes (thread -> process -> global). If
6742 we end up with too many actions for a single packet vcont_builder
6743 flushes the current vCont packet to the remote side and starts a
6745 struct vcont_builder
vcont_builder (this);
6747 /* Threads first. */
6748 for (thread_info
*tp
: all_non_exited_threads (this))
6750 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6752 /* If the thread was previously vCont-resumed, no need to send a specific
6753 action for it. If we didn't receive a resume request for it, don't
6754 send an action for it either. */
6755 if (remote_thr
->get_resume_state () != resume_state::RESUMED_PENDING_VCONT
)
6758 gdb_assert (!thread_is_in_step_over_chain (tp
));
6760 /* We should never be commit-resuming a thread that has a stop reply.
6761 Otherwise, we would end up reporting a stop event for a thread while
6762 it is running on the remote target. */
6763 remote_state
*rs
= get_remote_state ();
6764 for (const auto &stop_reply
: rs
->stop_reply_queue
)
6765 gdb_assert (stop_reply
->ptid
!= tp
->ptid
);
6767 const resumed_pending_vcont_info
&info
6768 = remote_thr
->resumed_pending_vcont_info ();
6770 /* Check if we need to send a specific action for this thread. If not,
6771 it will be included in a wildcard resume instead. */
6772 if (info
.step
|| info
.sig
!= GDB_SIGNAL_0
6773 || !get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6774 vcont_builder
.push_action (tp
->ptid
, info
.step
, info
.sig
);
6776 remote_thr
->set_resumed ();
6779 /* Now check whether we can send any process-wide wildcard. This is
6780 to avoid sending a global wildcard in the case nothing is
6781 supposed to be resumed. */
6782 bool any_process_wildcard
= false;
6784 for (inferior
*inf
: all_non_exited_inferiors (this))
6786 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6788 any_process_wildcard
= true;
6793 if (any_process_wildcard
)
6795 /* If all processes are wildcard-able, then send a single "c"
6796 action, otherwise, send an "all (-1) threads of process"
6797 continue action for each running process, if any. */
6798 if (may_global_wildcard_vcont
)
6800 vcont_builder
.push_action (minus_one_ptid
,
6801 false, GDB_SIGNAL_0
);
6805 for (inferior
*inf
: all_non_exited_inferiors (this))
6807 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6809 vcont_builder
.push_action (ptid_t (inf
->pid
),
6810 false, GDB_SIGNAL_0
);
6816 vcont_builder
.flush ();
6819 /* Implementation of target_has_pending_events. */
6822 remote_target::has_pending_events ()
6824 if (target_can_async_p ())
6826 remote_state
*rs
= get_remote_state ();
6828 if (async_event_handler_marked (rs
->remote_async_inferior_event_token
))
6831 /* Note that BUFCNT can be negative, indicating sticky
6833 if (rs
->remote_desc
->bufcnt
!= 0)
6841 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6842 thread, all threads of a remote process, or all threads of all
6846 remote_target::remote_stop_ns (ptid_t ptid
)
6848 struct remote_state
*rs
= get_remote_state ();
6849 char *p
= rs
->buf
.data ();
6850 char *endp
= p
+ get_remote_packet_size ();
6852 /* If any thread that needs to stop was resumed but pending a vCont
6853 resume, generate a phony stop_reply. However, first check
6854 whether the thread wasn't resumed with a signal. Generating a
6855 phony stop in that case would result in losing the signal. */
6856 bool needs_commit
= false;
6857 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6859 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6861 if (remote_thr
->get_resume_state ()
6862 == resume_state::RESUMED_PENDING_VCONT
)
6864 const resumed_pending_vcont_info
&info
6865 = remote_thr
->resumed_pending_vcont_info ();
6866 if (info
.sig
!= GDB_SIGNAL_0
)
6868 /* This signal must be forwarded to the inferior. We
6869 could commit-resume just this thread, but its simpler
6870 to just commit-resume everything. */
6871 needs_commit
= true;
6880 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6882 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6884 if (remote_thr
->get_resume_state ()
6885 == resume_state::RESUMED_PENDING_VCONT
)
6887 remote_debug_printf ("Enqueueing phony stop reply for thread pending "
6888 "vCont-resume (%d, %ld, %ld)", tp
->ptid
.pid(),
6889 tp
->ptid
.lwp (), tp
->ptid
.tid ());
6891 /* Check that the thread wasn't resumed with a signal.
6892 Generating a phony stop would result in losing the
6894 const resumed_pending_vcont_info
&info
6895 = remote_thr
->resumed_pending_vcont_info ();
6896 gdb_assert (info
.sig
== GDB_SIGNAL_0
);
6898 stop_reply
*sr
= new stop_reply ();
6899 sr
->ptid
= tp
->ptid
;
6901 sr
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
6902 sr
->ws
.value
.sig
= GDB_SIGNAL_0
;
6903 sr
->arch
= tp
->inf
->gdbarch
;
6904 sr
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6905 sr
->watch_data_address
= 0;
6907 this->push_stop_reply (sr
);
6909 /* Pretend that this thread was actually resumed on the
6910 remote target, then stopped. If we leave it in the
6911 RESUMED_PENDING_VCONT state and the commit_resumed
6912 method is called while the stop reply is still in the
6913 queue, we'll end up reporting a stop event to the core
6914 for that thread while it is running on the remote
6915 target... that would be bad. */
6916 remote_thr
->set_resumed ();
6920 /* FIXME: This supports_vCont_probed check is a workaround until
6921 packet_support is per-connection. */
6922 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6923 || !rs
->supports_vCont_probed
)
6924 remote_vcont_probe ();
6926 if (!rs
->supports_vCont
.t
)
6927 error (_("Remote server does not support stopping threads"));
6929 if (ptid
== minus_one_ptid
6930 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6931 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6936 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6939 /* All (-1) threads of process. */
6940 nptid
= ptid_t (ptid
.pid (), -1, 0);
6943 /* Small optimization: if we already have a stop reply for
6944 this thread, no use in telling the stub we want this
6946 if (peek_stop_reply (ptid
))
6952 write_ptid (p
, endp
, nptid
);
6955 /* In non-stop, we get an immediate OK reply. The stop reply will
6956 come in asynchronously by notification. */
6958 getpkt (&rs
->buf
, 0);
6959 if (strcmp (rs
->buf
.data (), "OK") != 0)
6960 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6964 /* All-stop version of target_interrupt. Sends a break or a ^C to
6965 interrupt the remote target. It is undefined which thread of which
6966 process reports the interrupt. */
6969 remote_target::remote_interrupt_as ()
6971 struct remote_state
*rs
= get_remote_state ();
6973 rs
->ctrlc_pending_p
= 1;
6975 /* If the inferior is stopped already, but the core didn't know
6976 about it yet, just ignore the request. The cached wait status
6977 will be collected in remote_wait. */
6978 if (rs
->cached_wait_status
)
6981 /* Send interrupt_sequence to remote target. */
6982 send_interrupt_sequence ();
6985 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6986 the remote target. It is undefined which thread of which process
6987 reports the interrupt. Throws an error if the packet is not
6988 supported by the server. */
6991 remote_target::remote_interrupt_ns ()
6993 struct remote_state
*rs
= get_remote_state ();
6994 char *p
= rs
->buf
.data ();
6995 char *endp
= p
+ get_remote_packet_size ();
6997 xsnprintf (p
, endp
- p
, "vCtrlC");
6999 /* In non-stop, we get an immediate OK reply. The stop reply will
7000 come in asynchronously by notification. */
7002 getpkt (&rs
->buf
, 0);
7004 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
7008 case PACKET_UNKNOWN
:
7009 error (_("No support for interrupting the remote target."));
7011 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
7015 /* Implement the to_stop function for the remote targets. */
7018 remote_target::stop (ptid_t ptid
)
7020 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7022 if (target_is_non_stop_p ())
7023 remote_stop_ns (ptid
);
7026 /* We don't currently have a way to transparently pause the
7027 remote target in all-stop mode. Interrupt it instead. */
7028 remote_interrupt_as ();
7032 /* Implement the to_interrupt function for the remote targets. */
7035 remote_target::interrupt ()
7037 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7039 if (target_is_non_stop_p ())
7040 remote_interrupt_ns ();
7042 remote_interrupt_as ();
7045 /* Implement the to_pass_ctrlc function for the remote targets. */
7048 remote_target::pass_ctrlc ()
7050 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7052 struct remote_state
*rs
= get_remote_state ();
7054 /* If we're starting up, we're not fully synced yet. Quit
7056 if (rs
->starting_up
)
7058 /* If ^C has already been sent once, offer to disconnect. */
7059 else if (rs
->ctrlc_pending_p
)
7062 target_interrupt ();
7065 /* Ask the user what to do when an interrupt is received. */
7068 remote_target::interrupt_query ()
7070 struct remote_state
*rs
= get_remote_state ();
7072 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
7074 if (query (_("The target is not responding to interrupt requests.\n"
7075 "Stop debugging it? ")))
7077 remote_unpush_target (this);
7078 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
7083 if (query (_("Interrupted while waiting for the program.\n"
7084 "Give up waiting? ")))
7089 /* Enable/disable target terminal ownership. Most targets can use
7090 terminal groups to control terminal ownership. Remote targets are
7091 different in that explicit transfer of ownership to/from GDB/target
7095 remote_target::terminal_inferior ()
7097 /* NOTE: At this point we could also register our selves as the
7098 recipient of all input. Any characters typed could then be
7099 passed on down to the target. */
7103 remote_target::terminal_ours ()
7108 remote_console_output (const char *msg
)
7112 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
7115 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
7119 gdb_stdtarg
->puts (tb
);
7121 gdb_stdtarg
->flush ();
7124 /* Return the length of the stop reply queue. */
7127 remote_target::stop_reply_queue_length ()
7129 remote_state
*rs
= get_remote_state ();
7130 return rs
->stop_reply_queue
.size ();
7134 remote_notif_stop_parse (remote_target
*remote
,
7135 struct notif_client
*self
, const char *buf
,
7136 struct notif_event
*event
)
7138 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
7142 remote_notif_stop_ack (remote_target
*remote
,
7143 struct notif_client
*self
, const char *buf
,
7144 struct notif_event
*event
)
7146 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
7149 putpkt (remote
, self
->ack_command
);
7151 /* Kind can be TARGET_WAITKIND_IGNORE if we have meanwhile discarded
7152 the notification. It was left in the queue because we need to
7153 acknowledge it and pull the rest of the notifications out. */
7154 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7155 remote
->push_stop_reply (stop_reply
);
7159 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
7160 struct notif_client
*self
)
7162 /* We can't get pending events in remote_notif_process for
7163 notification stop, and we have to do this in remote_wait_ns
7164 instead. If we fetch all queued events from stub, remote stub
7165 may exit and we have no chance to process them back in
7167 remote_state
*rs
= remote
->get_remote_state ();
7168 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7172 stop_reply::~stop_reply ()
7174 for (cached_reg_t
®
: regcache
)
7178 static notif_event_up
7179 remote_notif_stop_alloc_reply ()
7181 return notif_event_up (new struct stop_reply ());
7184 /* A client of notification Stop. */
7186 struct notif_client notif_client_stop
=
7190 remote_notif_stop_parse
,
7191 remote_notif_stop_ack
,
7192 remote_notif_stop_can_get_pending_events
,
7193 remote_notif_stop_alloc_reply
,
7197 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
7198 the pid of the process that owns the threads we want to check, or
7199 -1 if we want to check all threads. */
7202 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
7205 if (ws
->kind
== TARGET_WAITKIND_FORKED
7206 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
7208 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
7215 /* Return the thread's pending status used to determine whether the
7216 thread is a fork parent stopped at a fork event. */
7218 static struct target_waitstatus
*
7219 thread_pending_fork_status (struct thread_info
*thread
)
7221 if (thread
->suspend
.waitstatus_pending_p
)
7222 return &thread
->suspend
.waitstatus
;
7224 return &thread
->pending_follow
;
7227 /* Determine if THREAD is a pending fork parent thread. */
7230 is_pending_fork_parent_thread (struct thread_info
*thread
)
7232 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7235 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7238 /* If CONTEXT contains any fork child threads that have not been
7239 reported yet, remove them from the CONTEXT list. If such a
7240 thread exists it is because we are stopped at a fork catchpoint
7241 and have not yet called follow_fork, which will set up the
7242 host-side data structures for the new process. */
7245 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7248 struct notif_client
*notif
= ¬if_client_stop
;
7250 /* For any threads stopped at a fork event, remove the corresponding
7251 fork child threads from the CONTEXT list. */
7252 for (thread_info
*thread
: all_non_exited_threads (this))
7254 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7256 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7257 context
->remove_thread (ws
->value
.related_pid
);
7260 /* Check for any pending fork events (not reported or processed yet)
7261 in process PID and remove those fork child threads from the
7262 CONTEXT list as well. */
7263 remote_notif_get_pending_events (notif
);
7264 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7265 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7266 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7267 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7268 context
->remove_thread (event
->ws
.value
.related_pid
);
7271 /* Check whether any event pending in the vStopped queue would prevent a
7272 global or process wildcard vCont action. Set *may_global_wildcard to
7273 false if we can't do a global wildcard (vCont;c), and clear the event
7274 inferior's may_wildcard_vcont flag if we can't do a process-wide
7275 wildcard resume (vCont;c:pPID.-1). */
7278 remote_target::check_pending_events_prevent_wildcard_vcont
7279 (bool *may_global_wildcard
)
7281 struct notif_client
*notif
= ¬if_client_stop
;
7283 remote_notif_get_pending_events (notif
);
7284 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7286 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7287 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7290 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7291 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7292 *may_global_wildcard
= false;
7294 /* This may be the first time we heard about this process.
7295 Regardless, we must not do a global wildcard resume, otherwise
7296 we'd resume this process too. */
7297 *may_global_wildcard
= false;
7298 if (event
->ptid
!= null_ptid
)
7300 inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7302 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7307 /* Discard all pending stop replies of inferior INF. */
7310 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7312 struct stop_reply
*reply
;
7313 struct remote_state
*rs
= get_remote_state ();
7314 struct remote_notif_state
*rns
= rs
->notif_state
;
7316 /* This function can be notified when an inferior exists. When the
7317 target is not remote, the notification state is NULL. */
7318 if (rs
->remote_desc
== NULL
)
7321 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7323 /* Discard the in-flight notification. */
7324 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7326 /* Leave the notification pending, since the server expects that
7327 we acknowledge it with vStopped. But clear its contents, so
7328 that later on when we acknowledge it, we also discard it. */
7329 reply
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7332 fprintf_unfiltered (gdb_stdlog
,
7333 "discarded in-flight notification\n");
7336 /* Discard the stop replies we have already pulled with
7338 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7339 rs
->stop_reply_queue
.end (),
7340 [=] (const stop_reply_up
&event
)
7342 return event
->ptid
.pid () == inf
->pid
;
7344 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7347 /* Discard the stop replies for RS in stop_reply_queue. */
7350 remote_target::discard_pending_stop_replies_in_queue ()
7352 remote_state
*rs
= get_remote_state ();
7354 /* Discard the stop replies we have already pulled with
7356 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7357 rs
->stop_reply_queue
.end (),
7358 [=] (const stop_reply_up
&event
)
7360 return event
->rs
== rs
;
7362 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7365 /* Remove the first reply in 'stop_reply_queue' which matches
7369 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7371 remote_state
*rs
= get_remote_state ();
7373 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7374 rs
->stop_reply_queue
.end (),
7375 [=] (const stop_reply_up
&event
)
7377 return event
->ptid
.matches (ptid
);
7379 struct stop_reply
*result
;
7380 if (iter
== rs
->stop_reply_queue
.end ())
7384 result
= iter
->release ();
7385 rs
->stop_reply_queue
.erase (iter
);
7389 fprintf_unfiltered (gdb_stdlog
,
7390 "notif: discard queued event: 'Stop' in %s\n",
7391 target_pid_to_str (ptid
).c_str ());
7396 /* Look for a queued stop reply belonging to PTID. If one is found,
7397 remove it from the queue, and return it. Returns NULL if none is
7398 found. If there are still queued events left to process, tell the
7399 event loop to get back to target_wait soon. */
7402 remote_target::queued_stop_reply (ptid_t ptid
)
7404 remote_state
*rs
= get_remote_state ();
7405 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7407 if (!rs
->stop_reply_queue
.empty ())
7409 /* There's still at least an event left. */
7410 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7416 /* Push a fully parsed stop reply in the stop reply queue. Since we
7417 know that we now have at least one queued event left to pass to the
7418 core side, tell the event loop to get back to target_wait soon. */
7421 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7423 remote_state
*rs
= get_remote_state ();
7424 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7427 fprintf_unfiltered (gdb_stdlog
,
7428 "notif: push 'Stop' %s to queue %d\n",
7429 target_pid_to_str (new_event
->ptid
).c_str (),
7430 int (rs
->stop_reply_queue
.size ()));
7432 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7435 /* Returns true if we have a stop reply for PTID. */
7438 remote_target::peek_stop_reply (ptid_t ptid
)
7440 remote_state
*rs
= get_remote_state ();
7441 for (auto &event
: rs
->stop_reply_queue
)
7442 if (ptid
== event
->ptid
7443 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7448 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7449 starting with P and ending with PEND matches PREFIX. */
7452 strprefix (const char *p
, const char *pend
, const char *prefix
)
7454 for ( ; p
< pend
; p
++, prefix
++)
7457 return *prefix
== '\0';
7460 /* Parse the stop reply in BUF. Either the function succeeds, and the
7461 result is stored in EVENT, or throws an error. */
7464 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7466 remote_arch_state
*rsa
= NULL
;
7471 event
->ptid
= null_ptid
;
7472 event
->rs
= get_remote_state ();
7473 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7474 event
->ws
.value
.integer
= 0;
7475 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7476 event
->regcache
.clear ();
7481 case 'T': /* Status with PC, SP, FP, ... */
7482 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7483 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7485 n... = register number
7486 r... = register contents
7489 p
= &buf
[3]; /* after Txx */
7495 p1
= strchr (p
, ':');
7497 error (_("Malformed packet(a) (missing colon): %s\n\
7501 error (_("Malformed packet(a) (missing register number): %s\n\
7505 /* Some "registers" are actually extended stop information.
7506 Note if you're adding a new entry here: GDB 7.9 and
7507 earlier assume that all register "numbers" that start
7508 with an hex digit are real register numbers. Make sure
7509 the server only sends such a packet if it knows the
7510 client understands it. */
7512 if (strprefix (p
, p1
, "thread"))
7513 event
->ptid
= read_ptid (++p1
, &p
);
7514 else if (strprefix (p
, p1
, "syscall_entry"))
7518 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7519 p
= unpack_varlen_hex (++p1
, &sysno
);
7520 event
->ws
.value
.syscall_number
= (int) sysno
;
7522 else if (strprefix (p
, p1
, "syscall_return"))
7526 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7527 p
= unpack_varlen_hex (++p1
, &sysno
);
7528 event
->ws
.value
.syscall_number
= (int) sysno
;
7530 else if (strprefix (p
, p1
, "watch")
7531 || strprefix (p
, p1
, "rwatch")
7532 || strprefix (p
, p1
, "awatch"))
7534 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7535 p
= unpack_varlen_hex (++p1
, &addr
);
7536 event
->watch_data_address
= (CORE_ADDR
) addr
;
7538 else if (strprefix (p
, p1
, "swbreak"))
7540 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7542 /* Make sure the stub doesn't forget to indicate support
7544 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7545 error (_("Unexpected swbreak stop reason"));
7547 /* The value part is documented as "must be empty",
7548 though we ignore it, in case we ever decide to make
7549 use of it in a backward compatible way. */
7550 p
= strchrnul (p1
+ 1, ';');
7552 else if (strprefix (p
, p1
, "hwbreak"))
7554 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7556 /* Make sure the stub doesn't forget to indicate support
7558 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7559 error (_("Unexpected hwbreak stop reason"));
7562 p
= strchrnul (p1
+ 1, ';');
7564 else if (strprefix (p
, p1
, "library"))
7566 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7567 p
= strchrnul (p1
+ 1, ';');
7569 else if (strprefix (p
, p1
, "replaylog"))
7571 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7572 /* p1 will indicate "begin" or "end", but it makes
7573 no difference for now, so ignore it. */
7574 p
= strchrnul (p1
+ 1, ';');
7576 else if (strprefix (p
, p1
, "core"))
7580 p
= unpack_varlen_hex (++p1
, &c
);
7583 else if (strprefix (p
, p1
, "fork"))
7585 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7586 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7588 else if (strprefix (p
, p1
, "vfork"))
7590 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7591 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7593 else if (strprefix (p
, p1
, "vforkdone"))
7595 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7596 p
= strchrnul (p1
+ 1, ';');
7598 else if (strprefix (p
, p1
, "exec"))
7603 /* Determine the length of the execd pathname. */
7604 p
= unpack_varlen_hex (++p1
, &ignored
);
7605 pathlen
= (p
- p1
) / 2;
7607 /* Save the pathname for event reporting and for
7608 the next run command. */
7609 gdb::unique_xmalloc_ptr
<char[]> pathname
7610 ((char *) xmalloc (pathlen
+ 1));
7611 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7612 pathname
[pathlen
] = '\0';
7614 /* This is freed during event handling. */
7615 event
->ws
.value
.execd_pathname
= pathname
.release ();
7616 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7618 /* Skip the registers included in this packet, since
7619 they may be for an architecture different from the
7620 one used by the original program. */
7623 else if (strprefix (p
, p1
, "create"))
7625 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7626 p
= strchrnul (p1
+ 1, ';');
7635 p
= strchrnul (p1
+ 1, ';');
7640 /* Maybe a real ``P'' register number. */
7641 p_temp
= unpack_varlen_hex (p
, &pnum
);
7642 /* If the first invalid character is the colon, we got a
7643 register number. Otherwise, it's an unknown stop
7647 /* If we haven't parsed the event's thread yet, find
7648 it now, in order to find the architecture of the
7649 reported expedited registers. */
7650 if (event
->ptid
== null_ptid
)
7652 /* If there is no thread-id information then leave
7653 the event->ptid as null_ptid. Later in
7654 process_stop_reply we will pick a suitable
7656 const char *thr
= strstr (p1
+ 1, ";thread:");
7658 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7665 = (event
->ptid
== null_ptid
7667 : find_inferior_ptid (this, event
->ptid
));
7668 /* If this is the first time we learn anything
7669 about this process, skip the registers
7670 included in this packet, since we don't yet
7671 know which architecture to use to parse them.
7672 We'll determine the architecture later when
7673 we process the stop reply and retrieve the
7674 target description, via
7675 remote_notice_new_inferior ->
7676 post_create_inferior. */
7679 p
= strchrnul (p1
+ 1, ';');
7684 event
->arch
= inf
->gdbarch
;
7685 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7689 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7690 cached_reg_t cached_reg
;
7693 error (_("Remote sent bad register number %s: %s\n\
7695 hex_string (pnum
), p
, buf
);
7697 cached_reg
.num
= reg
->regnum
;
7698 cached_reg
.data
= (gdb_byte
*)
7699 xmalloc (register_size (event
->arch
, reg
->regnum
));
7702 fieldsize
= hex2bin (p
, cached_reg
.data
,
7703 register_size (event
->arch
, reg
->regnum
));
7705 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7706 warning (_("Remote reply is too short: %s"), buf
);
7708 event
->regcache
.push_back (cached_reg
);
7712 /* Not a number. Silently skip unknown optional
7714 p
= strchrnul (p1
+ 1, ';');
7719 error (_("Remote register badly formatted: %s\nhere: %s"),
7724 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7728 case 'S': /* Old style status, just signal only. */
7732 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7733 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7734 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7735 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7737 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7740 case 'w': /* Thread exited. */
7744 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7745 p
= unpack_varlen_hex (&buf
[1], &value
);
7746 event
->ws
.value
.integer
= value
;
7748 error (_("stop reply packet badly formatted: %s"), buf
);
7749 event
->ptid
= read_ptid (++p
, NULL
);
7752 case 'W': /* Target exited. */
7757 /* GDB used to accept only 2 hex chars here. Stubs should
7758 only send more if they detect GDB supports multi-process
7760 p
= unpack_varlen_hex (&buf
[1], &value
);
7764 /* The remote process exited. */
7765 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7766 event
->ws
.value
.integer
= value
;
7770 /* The remote process exited with a signal. */
7771 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7772 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7773 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7775 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7778 /* If no process is specified, return null_ptid, and let the
7779 caller figure out the right process to use. */
7789 else if (startswith (p
, "process:"))
7793 p
+= sizeof ("process:") - 1;
7794 unpack_varlen_hex (p
, &upid
);
7798 error (_("unknown stop reply packet: %s"), buf
);
7801 error (_("unknown stop reply packet: %s"), buf
);
7802 event
->ptid
= ptid_t (pid
);
7806 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7807 event
->ptid
= minus_one_ptid
;
7812 /* When the stub wants to tell GDB about a new notification reply, it
7813 sends a notification (%Stop, for example). Those can come it at
7814 any time, hence, we have to make sure that any pending
7815 putpkt/getpkt sequence we're making is finished, before querying
7816 the stub for more events with the corresponding ack command
7817 (vStopped, for example). E.g., if we started a vStopped sequence
7818 immediately upon receiving the notification, something like this
7826 1.6) <-- (registers reply to step #1.3)
7828 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7831 To solve this, whenever we parse a %Stop notification successfully,
7832 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7833 doing whatever we were doing:
7839 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7840 2.5) <-- (registers reply to step #2.3)
7842 Eventually after step #2.5, we return to the event loop, which
7843 notices there's an event on the
7844 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7845 associated callback --- the function below. At this point, we're
7846 always safe to start a vStopped sequence. :
7849 2.7) <-- T05 thread:2
7855 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7857 struct remote_state
*rs
= get_remote_state ();
7859 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7862 fprintf_unfiltered (gdb_stdlog
,
7863 "notif: process: '%s' ack pending event\n",
7867 nc
->ack (this, nc
, rs
->buf
.data (),
7868 rs
->notif_state
->pending_event
[nc
->id
]);
7869 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7873 getpkt (&rs
->buf
, 0);
7874 if (strcmp (rs
->buf
.data (), "OK") == 0)
7877 remote_notif_ack (this, nc
, rs
->buf
.data ());
7883 fprintf_unfiltered (gdb_stdlog
,
7884 "notif: process: '%s' no pending reply\n",
7889 /* Wrapper around remote_target::remote_notif_get_pending_events to
7890 avoid having to export the whole remote_target class. */
7893 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7895 remote
->remote_notif_get_pending_events (nc
);
7898 /* Called from process_stop_reply when the stop packet we are responding
7899 to didn't include a process-id or thread-id. STATUS is the stop event
7900 we are responding to.
7902 It is the task of this function to select a suitable thread (or process)
7903 and return its ptid, this is the thread (or process) we will assume the
7904 stop event came from.
7906 In some cases there isn't really any choice about which thread (or
7907 process) is selected, a basic remote with a single process containing a
7908 single thread might choose not to send any process-id or thread-id in
7909 its stop packets, this function will select and return the one and only
7912 However, if a target supports multiple threads (or processes) and still
7913 doesn't include a thread-id (or process-id) in its stop packet then
7914 first, this is a badly behaving target, and second, we're going to have
7915 to select a thread (or process) at random and use that. This function
7916 will print a warning to the user if it detects that there is the
7917 possibility that GDB is guessing which thread (or process) to
7920 Note that this is called before GDB fetches the updated thread list from the
7921 target. So it's possible for the stop reply to be ambiguous and for GDB to
7922 not realize it. For example, if there's initially one thread, the target
7923 spawns a second thread, and then sends a stop reply without an id that
7924 concerns the first thread. GDB will assume the stop reply is about the
7925 first thread - the only thread it knows about - without printing a warning.
7926 Anyway, if the remote meant for the stop reply to be about the second thread,
7927 then it would be really broken, because GDB doesn't know about that thread
7931 remote_target::select_thread_for_ambiguous_stop_reply
7932 (const struct target_waitstatus
*status
)
7934 /* Some stop events apply to all threads in an inferior, while others
7935 only apply to a single thread. */
7936 bool process_wide_stop
7937 = (status
->kind
== TARGET_WAITKIND_EXITED
7938 || status
->kind
== TARGET_WAITKIND_SIGNALLED
);
7940 thread_info
*first_resumed_thread
= nullptr;
7941 bool ambiguous
= false;
7943 /* Consider all non-exited threads of the target, find the first resumed
7945 for (thread_info
*thr
: all_non_exited_threads (this))
7947 remote_thread_info
*remote_thr
= get_remote_thread_info (thr
);
7949 if (remote_thr
->get_resume_state () != resume_state::RESUMED
)
7952 if (first_resumed_thread
== nullptr)
7953 first_resumed_thread
= thr
;
7954 else if (!process_wide_stop
7955 || first_resumed_thread
->ptid
.pid () != thr
->ptid
.pid ())
7959 gdb_assert (first_resumed_thread
!= nullptr);
7961 /* Warn if the remote target is sending ambiguous stop replies. */
7964 static bool warned
= false;
7968 /* If you are seeing this warning then the remote target has
7969 stopped without specifying a thread-id, but the target
7970 does have multiple threads (or inferiors), and so GDB is
7971 having to guess which thread stopped.
7973 Examples of what might cause this are the target sending
7974 and 'S' stop packet, or a 'T' stop packet and not
7975 including a thread-id.
7977 Additionally, the target might send a 'W' or 'X packet
7978 without including a process-id, when the target has
7979 multiple running inferiors. */
7980 if (process_wide_stop
)
7981 warning (_("multi-inferior target stopped without "
7982 "sending a process-id, using first "
7983 "non-exited inferior"));
7985 warning (_("multi-threaded target stopped without "
7986 "sending a thread-id, using first "
7987 "non-exited thread"));
7992 /* If this is a stop for all threads then don't use a particular threads
7993 ptid, instead create a new ptid where only the pid field is set. */
7994 if (process_wide_stop
)
7995 return ptid_t (first_resumed_thread
->ptid
.pid ());
7997 return first_resumed_thread
->ptid
;
8000 /* Called when it is decided that STOP_REPLY holds the info of the
8001 event that is to be returned to the core. This function always
8002 destroys STOP_REPLY. */
8005 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
8006 struct target_waitstatus
*status
)
8008 *status
= stop_reply
->ws
;
8009 ptid_t ptid
= stop_reply
->ptid
;
8011 /* If no thread/process was reported by the stub then select a suitable
8013 if (ptid
== null_ptid
)
8014 ptid
= select_thread_for_ambiguous_stop_reply (status
);
8015 gdb_assert (ptid
!= null_ptid
);
8017 if (status
->kind
!= TARGET_WAITKIND_EXITED
8018 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
8019 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
8021 /* Expedited registers. */
8022 if (!stop_reply
->regcache
.empty ())
8024 struct regcache
*regcache
8025 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
8027 for (cached_reg_t
®
: stop_reply
->regcache
)
8029 regcache
->raw_supply (reg
.num
, reg
.data
);
8033 stop_reply
->regcache
.clear ();
8036 remote_notice_new_inferior (ptid
, false);
8037 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
8038 remote_thr
->core
= stop_reply
->core
;
8039 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
8040 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
8042 if (target_is_non_stop_p ())
8044 /* If the target works in non-stop mode, a stop-reply indicates that
8045 only this thread stopped. */
8046 remote_thr
->set_not_resumed ();
8050 /* If the target works in all-stop mode, a stop-reply indicates that
8051 all the target's threads stopped. */
8052 for (thread_info
*tp
: all_non_exited_threads (this))
8053 get_remote_thread_info (tp
)->set_not_resumed ();
8061 /* The non-stop mode version of target_wait. */
8064 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
8065 target_wait_flags options
)
8067 struct remote_state
*rs
= get_remote_state ();
8068 struct stop_reply
*stop_reply
;
8072 /* If in non-stop mode, get out of getpkt even if a
8073 notification is received. */
8075 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
8078 if (ret
!= -1 && !is_notif
)
8081 case 'E': /* Error of some sort. */
8082 /* We're out of sync with the target now. Did it continue
8083 or not? We can't tell which thread it was in non-stop,
8084 so just ignore this. */
8085 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
8087 case 'O': /* Console output. */
8088 remote_console_output (&rs
->buf
[1]);
8091 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
8095 /* Acknowledge a pending stop reply that may have arrived in the
8097 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
8098 remote_notif_get_pending_events (¬if_client_stop
);
8100 /* If indeed we noticed a stop reply, we're done. */
8101 stop_reply
= queued_stop_reply (ptid
);
8102 if (stop_reply
!= NULL
)
8103 return process_stop_reply (stop_reply
, status
);
8105 /* Still no event. If we're just polling for an event, then
8106 return to the event loop. */
8107 if (options
& TARGET_WNOHANG
)
8109 status
->kind
= TARGET_WAITKIND_IGNORE
;
8110 return minus_one_ptid
;
8113 /* Otherwise do a blocking wait. */
8114 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
8118 /* Return the first resumed thread. */
8121 first_remote_resumed_thread (remote_target
*target
)
8123 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
8129 /* Wait until the remote machine stops, then return, storing status in
8130 STATUS just as `wait' would. */
8133 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
,
8134 target_wait_flags options
)
8136 struct remote_state
*rs
= get_remote_state ();
8137 ptid_t event_ptid
= null_ptid
;
8139 struct stop_reply
*stop_reply
;
8143 status
->kind
= TARGET_WAITKIND_IGNORE
;
8144 status
->value
.integer
= 0;
8146 stop_reply
= queued_stop_reply (ptid
);
8147 if (stop_reply
!= NULL
)
8148 return process_stop_reply (stop_reply
, status
);
8150 if (rs
->cached_wait_status
)
8151 /* Use the cached wait status, but only once. */
8152 rs
->cached_wait_status
= 0;
8157 int forever
= ((options
& TARGET_WNOHANG
) == 0
8158 && rs
->wait_forever_enabled_p
);
8160 if (!rs
->waiting_for_stop_reply
)
8162 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
8163 return minus_one_ptid
;
8166 /* FIXME: cagney/1999-09-27: If we're in async mode we should
8167 _never_ wait for ever -> test on target_is_async_p().
8168 However, before we do that we need to ensure that the caller
8169 knows how to take the target into/out of async mode. */
8170 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
8172 /* GDB gets a notification. Return to core as this event is
8174 if (ret
!= -1 && is_notif
)
8175 return minus_one_ptid
;
8177 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
8178 return minus_one_ptid
;
8181 buf
= rs
->buf
.data ();
8183 /* Assume that the target has acknowledged Ctrl-C unless we receive
8184 an 'F' or 'O' packet. */
8185 if (buf
[0] != 'F' && buf
[0] != 'O')
8186 rs
->ctrlc_pending_p
= 0;
8190 case 'E': /* Error of some sort. */
8191 /* We're out of sync with the target now. Did it continue or
8192 not? Not is more likely, so report a stop. */
8193 rs
->waiting_for_stop_reply
= 0;
8195 warning (_("Remote failure reply: %s"), buf
);
8196 status
->kind
= TARGET_WAITKIND_STOPPED
;
8197 status
->value
.sig
= GDB_SIGNAL_0
;
8199 case 'F': /* File-I/O request. */
8200 /* GDB may access the inferior memory while handling the File-I/O
8201 request, but we don't want GDB accessing memory while waiting
8202 for a stop reply. See the comments in putpkt_binary. Set
8203 waiting_for_stop_reply to 0 temporarily. */
8204 rs
->waiting_for_stop_reply
= 0;
8205 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
8206 rs
->ctrlc_pending_p
= 0;
8207 /* GDB handled the File-I/O request, and the target is running
8208 again. Keep waiting for events. */
8209 rs
->waiting_for_stop_reply
= 1;
8211 case 'N': case 'T': case 'S': case 'X': case 'W':
8213 /* There is a stop reply to handle. */
8214 rs
->waiting_for_stop_reply
= 0;
8217 = (struct stop_reply
*) remote_notif_parse (this,
8221 event_ptid
= process_stop_reply (stop_reply
, status
);
8224 case 'O': /* Console output. */
8225 remote_console_output (buf
+ 1);
8228 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
8230 /* Zero length reply means that we tried 'S' or 'C' and the
8231 remote system doesn't support it. */
8232 target_terminal::ours_for_output ();
8234 ("Can't send signals to this remote system. %s not sent.\n",
8235 gdb_signal_to_name (rs
->last_sent_signal
));
8236 rs
->last_sent_signal
= GDB_SIGNAL_0
;
8237 target_terminal::inferior ();
8239 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
8245 warning (_("Invalid remote reply: %s"), buf
);
8249 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
8250 return minus_one_ptid
;
8251 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
8253 /* Nothing interesting happened. If we're doing a non-blocking
8254 poll, we're done. Otherwise, go back to waiting. */
8255 if (options
& TARGET_WNOHANG
)
8256 return minus_one_ptid
;
8260 else if (status
->kind
!= TARGET_WAITKIND_EXITED
8261 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
8263 if (event_ptid
!= null_ptid
)
8264 record_currthread (rs
, event_ptid
);
8266 event_ptid
= first_remote_resumed_thread (this);
8270 /* A process exit. Invalidate our notion of current thread. */
8271 record_currthread (rs
, minus_one_ptid
);
8272 /* It's possible that the packet did not include a pid. */
8273 if (event_ptid
== null_ptid
)
8274 event_ptid
= first_remote_resumed_thread (this);
8275 /* EVENT_PTID could still be NULL_PTID. Double-check. */
8276 if (event_ptid
== null_ptid
)
8277 event_ptid
= magic_null_ptid
;
8283 /* Wait until the remote machine stops, then return, storing status in
8284 STATUS just as `wait' would. */
8287 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
,
8288 target_wait_flags options
)
8290 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
8292 remote_state
*rs
= get_remote_state ();
8294 /* Start by clearing the flag that asks for our wait method to be called,
8295 we'll mark it again at the end if needed. */
8296 if (target_is_async_p ())
8297 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
8301 if (target_is_non_stop_p ())
8302 event_ptid
= wait_ns (ptid
, status
, options
);
8304 event_ptid
= wait_as (ptid
, status
, options
);
8306 if (target_is_async_p ())
8308 /* If there are events left in the queue, or unacknowledged
8309 notifications, then tell the event loop to call us again. */
8310 if (!rs
->stop_reply_queue
.empty ()
8311 || rs
->notif_state
->pending_event
[notif_client_stop
.id
] != nullptr)
8312 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
8318 /* Fetch a single register using a 'p' packet. */
8321 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8324 struct gdbarch
*gdbarch
= regcache
->arch ();
8325 struct remote_state
*rs
= get_remote_state ();
8327 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8330 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8333 if (reg
->pnum
== -1)
8336 p
= rs
->buf
.data ();
8338 p
+= hexnumstr (p
, reg
->pnum
);
8341 getpkt (&rs
->buf
, 0);
8343 buf
= rs
->buf
.data ();
8345 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8349 case PACKET_UNKNOWN
:
8352 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8353 gdbarch_register_name (regcache
->arch (),
8358 /* If this register is unfetchable, tell the regcache. */
8361 regcache
->raw_supply (reg
->regnum
, NULL
);
8365 /* Otherwise, parse and supply the value. */
8371 error (_("fetch_register_using_p: early buf termination"));
8373 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8376 regcache
->raw_supply (reg
->regnum
, regp
);
8380 /* Fetch the registers included in the target's 'g' packet. */
8383 remote_target::send_g_packet ()
8385 struct remote_state
*rs
= get_remote_state ();
8388 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8390 getpkt (&rs
->buf
, 0);
8391 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8392 error (_("Could not read registers; remote failure reply '%s'"),
8395 /* We can get out of synch in various cases. If the first character
8396 in the buffer is not a hex character, assume that has happened
8397 and try to fetch another packet to read. */
8398 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8399 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8400 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8401 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8403 remote_debug_printf ("Bad register packet; fetching a new packet");
8404 getpkt (&rs
->buf
, 0);
8407 buf_len
= strlen (rs
->buf
.data ());
8409 /* Sanity check the received packet. */
8410 if (buf_len
% 2 != 0)
8411 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8417 remote_target::process_g_packet (struct regcache
*regcache
)
8419 struct gdbarch
*gdbarch
= regcache
->arch ();
8420 struct remote_state
*rs
= get_remote_state ();
8421 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8426 buf_len
= strlen (rs
->buf
.data ());
8428 /* Further sanity checks, with knowledge of the architecture. */
8429 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8430 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8432 rsa
->sizeof_g_packet
, buf_len
/ 2,
8435 /* Save the size of the packet sent to us by the target. It is used
8436 as a heuristic when determining the max size of packets that the
8437 target can safely receive. */
8438 if (rsa
->actual_register_packet_size
== 0)
8439 rsa
->actual_register_packet_size
= buf_len
;
8441 /* If this is smaller than we guessed the 'g' packet would be,
8442 update our records. A 'g' reply that doesn't include a register's
8443 value implies either that the register is not available, or that
8444 the 'p' packet must be used. */
8445 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8447 long sizeof_g_packet
= buf_len
/ 2;
8449 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8451 long offset
= rsa
->regs
[i
].offset
;
8452 long reg_size
= register_size (gdbarch
, i
);
8454 if (rsa
->regs
[i
].pnum
== -1)
8457 if (offset
>= sizeof_g_packet
)
8458 rsa
->regs
[i
].in_g_packet
= 0;
8459 else if (offset
+ reg_size
> sizeof_g_packet
)
8460 error (_("Truncated register %d in remote 'g' packet"), i
);
8462 rsa
->regs
[i
].in_g_packet
= 1;
8465 /* Looks valid enough, we can assume this is the correct length
8466 for a 'g' packet. It's important not to adjust
8467 rsa->sizeof_g_packet if we have truncated registers otherwise
8468 this "if" won't be run the next time the method is called
8469 with a packet of the same size and one of the internal errors
8470 below will trigger instead. */
8471 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8474 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8476 /* Unimplemented registers read as all bits zero. */
8477 memset (regs
, 0, rsa
->sizeof_g_packet
);
8479 /* Reply describes registers byte by byte, each byte encoded as two
8480 hex characters. Suck them all up, then supply them to the
8481 register cacheing/storage mechanism. */
8483 p
= rs
->buf
.data ();
8484 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8486 if (p
[0] == 0 || p
[1] == 0)
8487 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8488 internal_error (__FILE__
, __LINE__
,
8489 _("unexpected end of 'g' packet reply"));
8491 if (p
[0] == 'x' && p
[1] == 'x')
8492 regs
[i
] = 0; /* 'x' */
8494 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8498 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8500 struct packet_reg
*r
= &rsa
->regs
[i
];
8501 long reg_size
= register_size (gdbarch
, i
);
8505 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8506 /* This shouldn't happen - we adjusted in_g_packet above. */
8507 internal_error (__FILE__
, __LINE__
,
8508 _("unexpected end of 'g' packet reply"));
8509 else if (rs
->buf
[r
->offset
* 2] == 'x')
8511 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8512 /* The register isn't available, mark it as such (at
8513 the same time setting the value to zero). */
8514 regcache
->raw_supply (r
->regnum
, NULL
);
8517 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8523 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8526 process_g_packet (regcache
);
8529 /* Make the remote selected traceframe match GDB's selected
8533 remote_target::set_remote_traceframe ()
8536 struct remote_state
*rs
= get_remote_state ();
8538 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8541 /* Avoid recursion, remote_trace_find calls us again. */
8542 rs
->remote_traceframe_number
= get_traceframe_number ();
8544 newnum
= target_trace_find (tfind_number
,
8545 get_traceframe_number (), 0, 0, NULL
);
8547 /* Should not happen. If it does, all bets are off. */
8548 if (newnum
!= get_traceframe_number ())
8549 warning (_("could not set remote traceframe"));
8553 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8555 struct gdbarch
*gdbarch
= regcache
->arch ();
8556 struct remote_state
*rs
= get_remote_state ();
8557 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8560 set_remote_traceframe ();
8561 set_general_thread (regcache
->ptid ());
8565 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8567 gdb_assert (reg
!= NULL
);
8569 /* If this register might be in the 'g' packet, try that first -
8570 we are likely to read more than one register. If this is the
8571 first 'g' packet, we might be overly optimistic about its
8572 contents, so fall back to 'p'. */
8573 if (reg
->in_g_packet
)
8575 fetch_registers_using_g (regcache
);
8576 if (reg
->in_g_packet
)
8580 if (fetch_register_using_p (regcache
, reg
))
8583 /* This register is not available. */
8584 regcache
->raw_supply (reg
->regnum
, NULL
);
8589 fetch_registers_using_g (regcache
);
8591 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8592 if (!rsa
->regs
[i
].in_g_packet
)
8593 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8595 /* This register is not available. */
8596 regcache
->raw_supply (i
, NULL
);
8600 /* Prepare to store registers. Since we may send them all (using a
8601 'G' request), we have to read out the ones we don't want to change
8605 remote_target::prepare_to_store (struct regcache
*regcache
)
8607 struct remote_state
*rs
= get_remote_state ();
8608 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8611 /* Make sure the entire registers array is valid. */
8612 switch (packet_support (PACKET_P
))
8614 case PACKET_DISABLE
:
8615 case PACKET_SUPPORT_UNKNOWN
:
8616 /* Make sure all the necessary registers are cached. */
8617 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8618 if (rsa
->regs
[i
].in_g_packet
)
8619 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8626 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8627 packet was not recognized. */
8630 remote_target::store_register_using_P (const struct regcache
*regcache
,
8633 struct gdbarch
*gdbarch
= regcache
->arch ();
8634 struct remote_state
*rs
= get_remote_state ();
8635 /* Try storing a single register. */
8636 char *buf
= rs
->buf
.data ();
8637 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8640 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8643 if (reg
->pnum
== -1)
8646 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8647 p
= buf
+ strlen (buf
);
8648 regcache
->raw_collect (reg
->regnum
, regp
);
8649 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8651 getpkt (&rs
->buf
, 0);
8653 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8658 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8659 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8660 case PACKET_UNKNOWN
:
8663 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8667 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8668 contents of the register cache buffer. FIXME: ignores errors. */
8671 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8673 struct remote_state
*rs
= get_remote_state ();
8674 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8678 /* Extract all the registers in the regcache copying them into a
8683 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8684 memset (regs
, 0, rsa
->sizeof_g_packet
);
8685 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8687 struct packet_reg
*r
= &rsa
->regs
[i
];
8690 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8694 /* Command describes registers byte by byte,
8695 each byte encoded as two hex characters. */
8696 p
= rs
->buf
.data ();
8698 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8700 getpkt (&rs
->buf
, 0);
8701 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8702 error (_("Could not write registers; remote failure reply '%s'"),
8706 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8707 of the register cache buffer. FIXME: ignores errors. */
8710 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8712 struct gdbarch
*gdbarch
= regcache
->arch ();
8713 struct remote_state
*rs
= get_remote_state ();
8714 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8717 set_remote_traceframe ();
8718 set_general_thread (regcache
->ptid ());
8722 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8724 gdb_assert (reg
!= NULL
);
8726 /* Always prefer to store registers using the 'P' packet if
8727 possible; we often change only a small number of registers.
8728 Sometimes we change a larger number; we'd need help from a
8729 higher layer to know to use 'G'. */
8730 if (store_register_using_P (regcache
, reg
))
8733 /* For now, don't complain if we have no way to write the
8734 register. GDB loses track of unavailable registers too
8735 easily. Some day, this may be an error. We don't have
8736 any way to read the register, either... */
8737 if (!reg
->in_g_packet
)
8740 store_registers_using_G (regcache
);
8744 store_registers_using_G (regcache
);
8746 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8747 if (!rsa
->regs
[i
].in_g_packet
)
8748 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8749 /* See above for why we do not issue an error here. */
8754 /* Return the number of hex digits in num. */
8757 hexnumlen (ULONGEST num
)
8761 for (i
= 0; num
!= 0; i
++)
8764 return std::max (i
, 1);
8767 /* Set BUF to the minimum number of hex digits representing NUM. */
8770 hexnumstr (char *buf
, ULONGEST num
)
8772 int len
= hexnumlen (num
);
8774 return hexnumnstr (buf
, num
, len
);
8778 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8781 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8787 for (i
= width
- 1; i
>= 0; i
--)
8789 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8796 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8799 remote_address_masked (CORE_ADDR addr
)
8801 unsigned int address_size
= remote_address_size
;
8803 /* If "remoteaddresssize" was not set, default to target address size. */
8805 address_size
= gdbarch_addr_bit (target_gdbarch ());
8807 if (address_size
> 0
8808 && address_size
< (sizeof (ULONGEST
) * 8))
8810 /* Only create a mask when that mask can safely be constructed
8811 in a ULONGEST variable. */
8814 mask
= (mask
<< address_size
) - 1;
8820 /* Determine whether the remote target supports binary downloading.
8821 This is accomplished by sending a no-op memory write of zero length
8822 to the target at the specified address. It does not suffice to send
8823 the whole packet, since many stubs strip the eighth bit and
8824 subsequently compute a wrong checksum, which causes real havoc with
8827 NOTE: This can still lose if the serial line is not eight-bit
8828 clean. In cases like this, the user should clear "remote
8832 remote_target::check_binary_download (CORE_ADDR addr
)
8834 struct remote_state
*rs
= get_remote_state ();
8836 switch (packet_support (PACKET_X
))
8838 case PACKET_DISABLE
:
8842 case PACKET_SUPPORT_UNKNOWN
:
8846 p
= rs
->buf
.data ();
8848 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8850 p
+= hexnumstr (p
, (ULONGEST
) 0);
8854 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8855 getpkt (&rs
->buf
, 0);
8857 if (rs
->buf
[0] == '\0')
8859 remote_debug_printf ("binary downloading NOT supported by target");
8860 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8864 remote_debug_printf ("binary downloading supported by target");
8865 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8872 /* Helper function to resize the payload in order to try to get a good
8873 alignment. We try to write an amount of data such that the next write will
8874 start on an address aligned on REMOTE_ALIGN_WRITES. */
8877 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8879 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8882 /* Write memory data directly to the remote machine.
8883 This does not inform the data cache; the data cache uses this.
8884 HEADER is the starting part of the packet.
8885 MEMADDR is the address in the remote memory space.
8886 MYADDR is the address of the buffer in our space.
8887 LEN_UNITS is the number of addressable units to write.
8888 UNIT_SIZE is the length in bytes of an addressable unit.
8889 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8890 should send data as binary ('X'), or hex-encoded ('M').
8892 The function creates packet of the form
8893 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8895 where encoding of <DATA> is terminated by PACKET_FORMAT.
8897 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8900 Return the transferred status, error or OK (an
8901 'enum target_xfer_status' value). Save the number of addressable units
8902 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8904 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8905 exchange between gdb and the stub could look like (?? in place of the
8911 -> $M1000,3:eeeeffffeeee#??
8915 <- eeeeffffeeeedddd */
8918 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8919 const gdb_byte
*myaddr
,
8922 ULONGEST
*xfered_len_units
,
8923 char packet_format
, int use_length
)
8925 struct remote_state
*rs
= get_remote_state ();
8931 int payload_capacity_bytes
;
8932 int payload_length_bytes
;
8934 if (packet_format
!= 'X' && packet_format
!= 'M')
8935 internal_error (__FILE__
, __LINE__
,
8936 _("remote_write_bytes_aux: bad packet format"));
8939 return TARGET_XFER_EOF
;
8941 payload_capacity_bytes
= get_memory_write_packet_size ();
8943 /* The packet buffer will be large enough for the payload;
8944 get_memory_packet_size ensures this. */
8947 /* Compute the size of the actual payload by subtracting out the
8948 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8950 payload_capacity_bytes
-= strlen ("$,:#NN");
8952 /* The comma won't be used. */
8953 payload_capacity_bytes
+= 1;
8954 payload_capacity_bytes
-= strlen (header
);
8955 payload_capacity_bytes
-= hexnumlen (memaddr
);
8957 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8959 strcat (rs
->buf
.data (), header
);
8960 p
= rs
->buf
.data () + strlen (header
);
8962 /* Compute a best guess of the number of bytes actually transfered. */
8963 if (packet_format
== 'X')
8965 /* Best guess at number of bytes that will fit. */
8966 todo_units
= std::min (len_units
,
8967 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8969 payload_capacity_bytes
-= hexnumlen (todo_units
);
8970 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8974 /* Number of bytes that will fit. */
8976 = std::min (len_units
,
8977 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8979 payload_capacity_bytes
-= hexnumlen (todo_units
);
8980 todo_units
= std::min (todo_units
,
8981 (payload_capacity_bytes
/ unit_size
) / 2);
8984 if (todo_units
<= 0)
8985 internal_error (__FILE__
, __LINE__
,
8986 _("minimum packet size too small to write data"));
8988 /* If we already need another packet, then try to align the end
8989 of this packet to a useful boundary. */
8990 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8991 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8993 /* Append "<memaddr>". */
8994 memaddr
= remote_address_masked (memaddr
);
8995 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9002 /* Append the length and retain its location and size. It may need to be
9003 adjusted once the packet body has been created. */
9005 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
9013 /* Append the packet body. */
9014 if (packet_format
== 'X')
9016 /* Binary mode. Send target system values byte by byte, in
9017 increasing byte addresses. Only escape certain critical
9019 payload_length_bytes
=
9020 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
9021 &units_written
, payload_capacity_bytes
);
9023 /* If not all TODO units fit, then we'll need another packet. Make
9024 a second try to keep the end of the packet aligned. Don't do
9025 this if the packet is tiny. */
9026 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
9030 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
9032 if (new_todo_units
!= units_written
)
9033 payload_length_bytes
=
9034 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
9035 (gdb_byte
*) p
, &units_written
,
9036 payload_capacity_bytes
);
9039 p
+= payload_length_bytes
;
9040 if (use_length
&& units_written
< todo_units
)
9042 /* Escape chars have filled up the buffer prematurely,
9043 and we have actually sent fewer units than planned.
9044 Fix-up the length field of the packet. Use the same
9045 number of characters as before. */
9046 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
9048 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
9053 /* Normal mode: Send target system values byte by byte, in
9054 increasing byte addresses. Each byte is encoded as a two hex
9056 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
9057 units_written
= todo_units
;
9060 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
9061 getpkt (&rs
->buf
, 0);
9063 if (rs
->buf
[0] == 'E')
9064 return TARGET_XFER_E_IO
;
9066 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
9067 send fewer units than we'd planned. */
9068 *xfered_len_units
= (ULONGEST
) units_written
;
9069 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9072 /* Write memory data directly to the remote machine.
9073 This does not inform the data cache; the data cache uses this.
9074 MEMADDR is the address in the remote memory space.
9075 MYADDR is the address of the buffer in our space.
9076 LEN is the number of bytes.
9078 Return the transferred status, error or OK (an
9079 'enum target_xfer_status' value). Save the number of bytes
9080 transferred in *XFERED_LEN. Only transfer a single packet. */
9083 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
9084 ULONGEST len
, int unit_size
,
9085 ULONGEST
*xfered_len
)
9087 const char *packet_format
= NULL
;
9089 /* Check whether the target supports binary download. */
9090 check_binary_download (memaddr
);
9092 switch (packet_support (PACKET_X
))
9095 packet_format
= "X";
9097 case PACKET_DISABLE
:
9098 packet_format
= "M";
9100 case PACKET_SUPPORT_UNKNOWN
:
9101 internal_error (__FILE__
, __LINE__
,
9102 _("remote_write_bytes: bad internal state"));
9104 internal_error (__FILE__
, __LINE__
, _("bad switch"));
9107 return remote_write_bytes_aux (packet_format
,
9108 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
9109 packet_format
[0], 1);
9112 /* Read memory data directly from the remote machine.
9113 This does not use the data cache; the data cache uses this.
9114 MEMADDR is the address in the remote memory space.
9115 MYADDR is the address of the buffer in our space.
9116 LEN_UNITS is the number of addressable memory units to read..
9117 UNIT_SIZE is the length in bytes of an addressable unit.
9119 Return the transferred status, error or OK (an
9120 'enum target_xfer_status' value). Save the number of bytes
9121 transferred in *XFERED_LEN_UNITS.
9123 See the comment of remote_write_bytes_aux for an example of
9124 memory read/write exchange between gdb and the stub. */
9127 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
9129 int unit_size
, ULONGEST
*xfered_len_units
)
9131 struct remote_state
*rs
= get_remote_state ();
9132 int buf_size_bytes
; /* Max size of packet output buffer. */
9137 buf_size_bytes
= get_memory_read_packet_size ();
9138 /* The packet buffer will be large enough for the payload;
9139 get_memory_packet_size ensures this. */
9141 /* Number of units that will fit. */
9142 todo_units
= std::min (len_units
,
9143 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
9145 /* Construct "m"<memaddr>","<len>". */
9146 memaddr
= remote_address_masked (memaddr
);
9147 p
= rs
->buf
.data ();
9149 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9151 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
9154 getpkt (&rs
->buf
, 0);
9155 if (rs
->buf
[0] == 'E'
9156 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
9157 && rs
->buf
[3] == '\0')
9158 return TARGET_XFER_E_IO
;
9159 /* Reply describes memory byte by byte, each byte encoded as two hex
9161 p
= rs
->buf
.data ();
9162 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
9163 /* Return what we have. Let higher layers handle partial reads. */
9164 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
9165 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9168 /* Using the set of read-only target sections of remote, read live
9171 For interface/parameters/return description see target.h,
9175 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
9179 ULONGEST
*xfered_len
)
9181 const struct target_section
*secp
;
9183 secp
= target_section_by_addr (this, memaddr
);
9185 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
9187 ULONGEST memend
= memaddr
+ len
;
9189 const target_section_table
*table
= target_get_section_table (this);
9190 for (const target_section
&p
: *table
)
9192 if (memaddr
>= p
.addr
)
9194 if (memend
<= p
.endaddr
)
9196 /* Entire transfer is within this section. */
9197 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9200 else if (memaddr
>= p
.endaddr
)
9202 /* This section ends before the transfer starts. */
9207 /* This section overlaps the transfer. Just do half. */
9208 len
= p
.endaddr
- memaddr
;
9209 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9216 return TARGET_XFER_EOF
;
9219 /* Similar to remote_read_bytes_1, but it reads from the remote stub
9220 first if the requested memory is unavailable in traceframe.
9221 Otherwise, fall back to remote_read_bytes_1. */
9224 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
9225 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
9226 ULONGEST
*xfered_len
)
9229 return TARGET_XFER_EOF
;
9231 if (get_traceframe_number () != -1)
9233 std::vector
<mem_range
> available
;
9235 /* If we fail to get the set of available memory, then the
9236 target does not support querying traceframe info, and so we
9237 attempt reading from the traceframe anyway (assuming the
9238 target implements the old QTro packet then). */
9239 if (traceframe_available_memory (&available
, memaddr
, len
))
9241 if (available
.empty () || available
[0].start
!= memaddr
)
9243 enum target_xfer_status res
;
9245 /* Don't read into the traceframe's available
9247 if (!available
.empty ())
9249 LONGEST oldlen
= len
;
9251 len
= available
[0].start
- memaddr
;
9252 gdb_assert (len
<= oldlen
);
9255 /* This goes through the topmost target again. */
9256 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
9257 len
, unit_size
, xfered_len
);
9258 if (res
== TARGET_XFER_OK
)
9259 return TARGET_XFER_OK
;
9262 /* No use trying further, we know some memory starting
9263 at MEMADDR isn't available. */
9265 return (*xfered_len
!= 0) ?
9266 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
9270 /* Don't try to read more than how much is available, in
9271 case the target implements the deprecated QTro packet to
9272 cater for older GDBs (the target's knowledge of read-only
9273 sections may be outdated by now). */
9274 len
= available
[0].length
;
9278 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
9283 /* Sends a packet with content determined by the printf format string
9284 FORMAT and the remaining arguments, then gets the reply. Returns
9285 whether the packet was a success, a failure, or unknown. */
9288 remote_target::remote_send_printf (const char *format
, ...)
9290 struct remote_state
*rs
= get_remote_state ();
9291 int max_size
= get_remote_packet_size ();
9294 va_start (ap
, format
);
9297 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
9301 if (size
>= max_size
)
9302 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
9304 if (putpkt (rs
->buf
) < 0)
9305 error (_("Communication problem with target."));
9308 getpkt (&rs
->buf
, 0);
9310 return packet_check_result (rs
->buf
);
9313 /* Flash writing can take quite some time. We'll set
9314 effectively infinite timeout for flash operations.
9315 In future, we'll need to decide on a better approach. */
9316 static const int remote_flash_timeout
= 1000;
9319 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9321 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9322 enum packet_result ret
;
9323 scoped_restore restore_timeout
9324 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9326 ret
= remote_send_printf ("vFlashErase:%s,%s",
9327 phex (address
, addr_size
),
9331 case PACKET_UNKNOWN
:
9332 error (_("Remote target does not support flash erase"));
9334 error (_("Error erasing flash with vFlashErase packet"));
9341 remote_target::remote_flash_write (ULONGEST address
,
9342 ULONGEST length
, ULONGEST
*xfered_len
,
9343 const gdb_byte
*data
)
9345 scoped_restore restore_timeout
9346 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9347 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9352 remote_target::flash_done ()
9356 scoped_restore restore_timeout
9357 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9359 ret
= remote_send_printf ("vFlashDone");
9363 case PACKET_UNKNOWN
:
9364 error (_("Remote target does not support vFlashDone"));
9366 error (_("Error finishing flash operation"));
9373 remote_target::files_info ()
9375 puts_filtered ("Debugging a target over a serial line.\n");
9378 /* Stuff for dealing with the packets which are part of this protocol.
9379 See comment at top of file for details. */
9381 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9382 error to higher layers. Called when a serial error is detected.
9383 The exception message is STRING, followed by a colon and a blank,
9384 the system error message for errno at function entry and final dot
9385 for output compatibility with throw_perror_with_name. */
9388 unpush_and_perror (remote_target
*target
, const char *string
)
9390 int saved_errno
= errno
;
9392 remote_unpush_target (target
);
9393 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9394 safe_strerror (saved_errno
));
9397 /* Read a single character from the remote end. The current quit
9398 handler is overridden to avoid quitting in the middle of packet
9399 sequence, as that would break communication with the remote server.
9400 See remote_serial_quit_handler for more detail. */
9403 remote_target::readchar (int timeout
)
9406 struct remote_state
*rs
= get_remote_state ();
9409 scoped_restore restore_quit_target
9410 = make_scoped_restore (&curr_quit_handler_target
, this);
9411 scoped_restore restore_quit
9412 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9414 rs
->got_ctrlc_during_io
= 0;
9416 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9418 if (rs
->got_ctrlc_during_io
)
9425 switch ((enum serial_rc
) ch
)
9428 remote_unpush_target (this);
9429 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9432 unpush_and_perror (this, _("Remote communication error. "
9433 "Target disconnected."));
9435 case SERIAL_TIMEOUT
:
9441 /* Wrapper for serial_write that closes the target and throws if
9442 writing fails. The current quit handler is overridden to avoid
9443 quitting in the middle of packet sequence, as that would break
9444 communication with the remote server. See
9445 remote_serial_quit_handler for more detail. */
9448 remote_target::remote_serial_write (const char *str
, int len
)
9450 struct remote_state
*rs
= get_remote_state ();
9452 scoped_restore restore_quit_target
9453 = make_scoped_restore (&curr_quit_handler_target
, this);
9454 scoped_restore restore_quit
9455 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9457 rs
->got_ctrlc_during_io
= 0;
9459 if (serial_write (rs
->remote_desc
, str
, len
))
9461 unpush_and_perror (this, _("Remote communication error. "
9462 "Target disconnected."));
9465 if (rs
->got_ctrlc_during_io
)
9469 /* Return a string representing an escaped version of BUF, of len N.
9470 E.g. \n is converted to \\n, \t to \\t, etc. */
9473 escape_buffer (const char *buf
, int n
)
9477 stb
.putstrn (buf
, n
, '\\');
9478 return std::move (stb
.string ());
9481 /* Display a null-terminated packet on stdout, for debugging, using C
9485 print_packet (const char *buf
)
9487 puts_filtered ("\"");
9488 fputstr_filtered (buf
, '"', gdb_stdout
);
9489 puts_filtered ("\"");
9493 remote_target::putpkt (const char *buf
)
9495 return putpkt_binary (buf
, strlen (buf
));
9498 /* Wrapper around remote_target::putpkt to avoid exporting
9502 putpkt (remote_target
*remote
, const char *buf
)
9504 return remote
->putpkt (buf
);
9507 /* Send a packet to the remote machine, with error checking. The data
9508 of the packet is in BUF. The string in BUF can be at most
9509 get_remote_packet_size () - 5 to account for the $, # and checksum,
9510 and for a possible /0 if we are debugging (remote_debug) and want
9511 to print the sent packet as a string. */
9514 remote_target::putpkt_binary (const char *buf
, int cnt
)
9516 struct remote_state
*rs
= get_remote_state ();
9518 unsigned char csum
= 0;
9519 gdb::def_vector
<char> data (cnt
+ 6);
9520 char *buf2
= data
.data ();
9526 /* Catch cases like trying to read memory or listing threads while
9527 we're waiting for a stop reply. The remote server wouldn't be
9528 ready to handle this request, so we'd hang and timeout. We don't
9529 have to worry about this in synchronous mode, because in that
9530 case it's not possible to issue a command while the target is
9531 running. This is not a problem in non-stop mode, because in that
9532 case, the stub is always ready to process serial input. */
9533 if (!target_is_non_stop_p ()
9534 && target_is_async_p ()
9535 && rs
->waiting_for_stop_reply
)
9537 error (_("Cannot execute this command while the target is running.\n"
9538 "Use the \"interrupt\" command to stop the target\n"
9539 "and then try again."));
9542 /* We're sending out a new packet. Make sure we don't look at a
9543 stale cached response. */
9544 rs
->cached_wait_status
= 0;
9546 /* Copy the packet into buffer BUF2, encapsulating it
9547 and giving it a checksum. */
9552 for (i
= 0; i
< cnt
; i
++)
9558 *p
++ = tohex ((csum
>> 4) & 0xf);
9559 *p
++ = tohex (csum
& 0xf);
9561 /* Send it over and over until we get a positive ack. */
9569 int len
= (int) (p
- buf2
);
9572 if (remote_packet_max_chars
< 0)
9575 max_chars
= remote_packet_max_chars
;
9578 = escape_buffer (buf2
, std::min (len
, max_chars
));
9580 if (len
> max_chars
)
9581 remote_debug_printf_nofunc
9582 ("Sending packet: %s [%d bytes omitted]", str
.c_str (),
9585 remote_debug_printf_nofunc ("Sending packet: %s", str
.c_str ());
9587 remote_serial_write (buf2
, p
- buf2
);
9589 /* If this is a no acks version of the remote protocol, send the
9590 packet and move on. */
9594 /* Read until either a timeout occurs (-2) or '+' is read.
9595 Handle any notification that arrives in the mean time. */
9598 ch
= readchar (remote_timeout
);
9603 remote_debug_printf_nofunc ("Received Ack");
9606 remote_debug_printf_nofunc ("Received Nak");
9608 case SERIAL_TIMEOUT
:
9612 break; /* Retransmit buffer. */
9615 remote_debug_printf ("Packet instead of Ack, ignoring it");
9616 /* It's probably an old response sent because an ACK
9617 was lost. Gobble up the packet and ack it so it
9618 doesn't get retransmitted when we resend this
9621 remote_serial_write ("+", 1);
9622 continue; /* Now, go look for +. */
9629 /* If we got a notification, handle it, and go back to looking
9631 /* We've found the start of a notification. Now
9632 collect the data. */
9633 val
= read_frame (&rs
->buf
);
9636 remote_debug_printf_nofunc
9637 (" Notification received: %s",
9638 escape_buffer (rs
->buf
.data (), val
).c_str ());
9640 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9641 /* We're in sync now, rewait for the ack. */
9645 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9651 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9655 break; /* Here to retransmit. */
9659 /* This is wrong. If doing a long backtrace, the user should be
9660 able to get out next time we call QUIT, without anything as
9661 violent as interrupt_query. If we want to provide a way out of
9662 here without getting to the next QUIT, it should be based on
9663 hitting ^C twice as in remote_wait. */
9675 /* Come here after finding the start of a frame when we expected an
9676 ack. Do our best to discard the rest of this packet. */
9679 remote_target::skip_frame ()
9685 c
= readchar (remote_timeout
);
9688 case SERIAL_TIMEOUT
:
9689 /* Nothing we can do. */
9692 /* Discard the two bytes of checksum and stop. */
9693 c
= readchar (remote_timeout
);
9695 c
= readchar (remote_timeout
);
9698 case '*': /* Run length encoding. */
9699 /* Discard the repeat count. */
9700 c
= readchar (remote_timeout
);
9705 /* A regular character. */
9711 /* Come here after finding the start of the frame. Collect the rest
9712 into *BUF, verifying the checksum, length, and handling run-length
9713 compression. NUL terminate the buffer. If there is not enough room,
9716 Returns -1 on error, number of characters in buffer (ignoring the
9717 trailing NULL) on success. (could be extended to return one of the
9718 SERIAL status indications). */
9721 remote_target::read_frame (gdb::char_vector
*buf_p
)
9726 char *buf
= buf_p
->data ();
9727 struct remote_state
*rs
= get_remote_state ();
9734 c
= readchar (remote_timeout
);
9737 case SERIAL_TIMEOUT
:
9738 remote_debug_printf ("Timeout in mid-packet, retrying");
9742 remote_debug_printf ("Saw new packet start in middle of old one");
9743 return -1; /* Start a new packet, count retries. */
9747 unsigned char pktcsum
;
9753 check_0
= readchar (remote_timeout
);
9755 check_1
= readchar (remote_timeout
);
9757 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9759 remote_debug_printf ("Timeout in checksum, retrying");
9762 else if (check_0
< 0 || check_1
< 0)
9764 remote_debug_printf ("Communication error in checksum");
9768 /* Don't recompute the checksum; with no ack packets we
9769 don't have any way to indicate a packet retransmission
9774 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9775 if (csum
== pktcsum
)
9779 ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s",
9780 pktcsum
, csum
, escape_buffer (buf
, bc
).c_str ());
9782 /* Number of characters in buffer ignoring trailing
9786 case '*': /* Run length encoding. */
9791 c
= readchar (remote_timeout
);
9793 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9795 /* The character before ``*'' is repeated. */
9797 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9799 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9801 /* Make some more room in the buffer. */
9802 buf_p
->resize (buf_p
->size () + repeat
);
9803 buf
= buf_p
->data ();
9806 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9812 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9816 if (bc
>= buf_p
->size () - 1)
9818 /* Make some more room in the buffer. */
9819 buf_p
->resize (buf_p
->size () * 2);
9820 buf
= buf_p
->data ();
9830 /* Set this to the maximum number of seconds to wait instead of waiting forever
9831 in target_wait(). If this timer times out, then it generates an error and
9832 the command is aborted. This replaces most of the need for timeouts in the
9833 GDB test suite, and makes it possible to distinguish between a hung target
9834 and one with slow communications. */
9836 static int watchdog
= 0;
9838 show_watchdog (struct ui_file
*file
, int from_tty
,
9839 struct cmd_list_element
*c
, const char *value
)
9841 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
9844 /* Read a packet from the remote machine, with error checking, and
9845 store it in *BUF. Resize *BUF if necessary to hold the result. If
9846 FOREVER, wait forever rather than timing out; this is used (in
9847 synchronous mode) to wait for a target that is is executing user
9849 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9850 don't have to change all the calls to getpkt to deal with the
9851 return value, because at the moment I don't know what the right
9852 thing to do it for those. */
9855 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9857 getpkt_sane (buf
, forever
);
9861 /* Read a packet from the remote machine, with error checking, and
9862 store it in *BUF. Resize *BUF if necessary to hold the result. If
9863 FOREVER, wait forever rather than timing out; this is used (in
9864 synchronous mode) to wait for a target that is is executing user
9865 code to stop. If FOREVER == 0, this function is allowed to time
9866 out gracefully and return an indication of this to the caller.
9867 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9868 consider receiving a notification enough reason to return to the
9869 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9870 holds a notification or not (a regular packet). */
9873 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9874 int forever
, int expecting_notif
,
9877 struct remote_state
*rs
= get_remote_state ();
9883 /* We're reading a new response. Make sure we don't look at a
9884 previously cached response. */
9885 rs
->cached_wait_status
= 0;
9887 strcpy (buf
->data (), "timeout");
9890 timeout
= watchdog
> 0 ? watchdog
: -1;
9891 else if (expecting_notif
)
9892 timeout
= 0; /* There should already be a char in the buffer. If
9895 timeout
= remote_timeout
;
9899 /* Process any number of notifications, and then return when
9903 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9905 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9907 /* This can loop forever if the remote side sends us
9908 characters continuously, but if it pauses, we'll get
9909 SERIAL_TIMEOUT from readchar because of timeout. Then
9910 we'll count that as a retry.
9912 Note that even when forever is set, we will only wait
9913 forever prior to the start of a packet. After that, we
9914 expect characters to arrive at a brisk pace. They should
9915 show up within remote_timeout intervals. */
9917 c
= readchar (timeout
);
9918 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9920 if (c
== SERIAL_TIMEOUT
)
9922 if (expecting_notif
)
9923 return -1; /* Don't complain, it's normal to not get
9924 anything in this case. */
9926 if (forever
) /* Watchdog went off? Kill the target. */
9928 remote_unpush_target (this);
9929 throw_error (TARGET_CLOSE_ERROR
,
9930 _("Watchdog timeout has expired. "
9931 "Target detached."));
9934 remote_debug_printf ("Timed out.");
9938 /* We've found the start of a packet or notification.
9939 Now collect the data. */
9940 val
= read_frame (buf
);
9945 remote_serial_write ("-", 1);
9948 if (tries
> MAX_TRIES
)
9950 /* We have tried hard enough, and just can't receive the
9951 packet/notification. Give up. */
9952 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9954 /* Skip the ack char if we're in no-ack mode. */
9955 if (!rs
->noack_mode
)
9956 remote_serial_write ("+", 1);
9960 /* If we got an ordinary packet, return that to our caller. */
9967 if (remote_packet_max_chars
< 0)
9970 max_chars
= remote_packet_max_chars
;
9973 = escape_buffer (buf
->data (),
9974 std::min (val
, max_chars
));
9976 if (val
> max_chars
)
9977 remote_debug_printf_nofunc
9978 ("Packet received: %s [%d bytes omitted]", str
.c_str (),
9981 remote_debug_printf_nofunc ("Packet received: %s",
9985 /* Skip the ack char if we're in no-ack mode. */
9986 if (!rs
->noack_mode
)
9987 remote_serial_write ("+", 1);
9988 if (is_notif
!= NULL
)
9993 /* If we got a notification, handle it, and go back to looking
9997 gdb_assert (c
== '%');
9999 remote_debug_printf_nofunc
10000 (" Notification received: %s",
10001 escape_buffer (buf
->data (), val
).c_str ());
10003 if (is_notif
!= NULL
)
10006 handle_notification (rs
->notif_state
, buf
->data ());
10008 /* Notifications require no acknowledgement. */
10010 if (expecting_notif
)
10017 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
10019 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
10023 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
10026 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
10029 /* Kill any new fork children of process PID that haven't been
10030 processed by follow_fork. */
10033 remote_target::kill_new_fork_children (int pid
)
10035 remote_state
*rs
= get_remote_state ();
10036 struct notif_client
*notif
= ¬if_client_stop
;
10038 /* Kill the fork child threads of any threads in process PID
10039 that are stopped at a fork event. */
10040 for (thread_info
*thread
: all_non_exited_threads (this))
10042 struct target_waitstatus
*ws
= &thread
->pending_follow
;
10044 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
10046 int child_pid
= ws
->value
.related_pid
.pid ();
10049 res
= remote_vkill (child_pid
);
10051 error (_("Can't kill fork child process %d"), child_pid
);
10055 /* Check for any pending fork events (not reported or processed yet)
10056 in process PID and kill those fork child threads as well. */
10057 remote_notif_get_pending_events (notif
);
10058 for (auto &event
: rs
->stop_reply_queue
)
10059 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
10061 int child_pid
= event
->ws
.value
.related_pid
.pid ();
10064 res
= remote_vkill (child_pid
);
10066 error (_("Can't kill fork child process %d"), child_pid
);
10071 /* Target hook to kill the current inferior. */
10074 remote_target::kill ()
10077 int pid
= inferior_ptid
.pid ();
10078 struct remote_state
*rs
= get_remote_state ();
10080 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
10082 /* If we're stopped while forking and we haven't followed yet,
10083 kill the child task. We need to do this before killing the
10084 parent task because if this is a vfork then the parent will
10086 kill_new_fork_children (pid
);
10088 res
= remote_vkill (pid
);
10091 target_mourn_inferior (inferior_ptid
);
10096 /* If we are in 'target remote' mode and we are killing the only
10097 inferior, then we will tell gdbserver to exit and unpush the
10099 if (res
== -1 && !remote_multi_process_p (rs
)
10100 && number_of_live_inferiors (this) == 1)
10104 /* We've killed the remote end, we get to mourn it. If we are
10105 not in extended mode, mourning the inferior also unpushes
10106 remote_ops from the target stack, which closes the remote
10108 target_mourn_inferior (inferior_ptid
);
10113 error (_("Can't kill process"));
10116 /* Send a kill request to the target using the 'vKill' packet. */
10119 remote_target::remote_vkill (int pid
)
10121 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
10124 remote_state
*rs
= get_remote_state ();
10126 /* Tell the remote target to detach. */
10127 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
10129 getpkt (&rs
->buf
, 0);
10131 switch (packet_ok (rs
->buf
,
10132 &remote_protocol_packets
[PACKET_vKill
]))
10138 case PACKET_UNKNOWN
:
10141 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
10145 /* Send a kill request to the target using the 'k' packet. */
10148 remote_target::remote_kill_k ()
10150 /* Catch errors so the user can quit from gdb even when we
10151 aren't on speaking terms with the remote system. */
10156 catch (const gdb_exception_error
&ex
)
10158 if (ex
.error
== TARGET_CLOSE_ERROR
)
10160 /* If we got an (EOF) error that caused the target
10161 to go away, then we're done, that's what we wanted.
10162 "k" is susceptible to cause a premature EOF, given
10163 that the remote server isn't actually required to
10164 reply to "k", and it can happen that it doesn't
10165 even get to reply ACK to the "k". */
10169 /* Otherwise, something went wrong. We didn't actually kill
10170 the target. Just propagate the exception, and let the
10171 user or higher layers decide what to do. */
10177 remote_target::mourn_inferior ()
10179 struct remote_state
*rs
= get_remote_state ();
10181 /* We're no longer interested in notification events of an inferior
10182 that exited or was killed/detached. */
10183 discard_pending_stop_replies (current_inferior ());
10185 /* In 'target remote' mode with one inferior, we close the connection. */
10186 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
10188 remote_unpush_target (this);
10192 /* In case we got here due to an error, but we're going to stay
10194 rs
->waiting_for_stop_reply
= 0;
10196 /* If the current general thread belonged to the process we just
10197 detached from or has exited, the remote side current general
10198 thread becomes undefined. Considering a case like this:
10200 - We just got here due to a detach.
10201 - The process that we're detaching from happens to immediately
10202 report a global breakpoint being hit in non-stop mode, in the
10203 same thread we had selected before.
10204 - GDB attaches to this process again.
10205 - This event happens to be the next event we handle.
10207 GDB would consider that the current general thread didn't need to
10208 be set on the stub side (with Hg), since for all it knew,
10209 GENERAL_THREAD hadn't changed.
10211 Notice that although in all-stop mode, the remote server always
10212 sets the current thread to the thread reporting the stop event,
10213 that doesn't happen in non-stop mode; in non-stop, the stub *must
10214 not* change the current thread when reporting a breakpoint hit,
10215 due to the decoupling of event reporting and event handling.
10217 To keep things simple, we always invalidate our notion of the
10219 record_currthread (rs
, minus_one_ptid
);
10221 /* Call common code to mark the inferior as not running. */
10222 generic_mourn_inferior ();
10226 extended_remote_target::supports_disable_randomization ()
10228 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
10232 remote_target::extended_remote_disable_randomization (int val
)
10234 struct remote_state
*rs
= get_remote_state ();
10237 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10238 "QDisableRandomization:%x", val
);
10240 reply
= remote_get_noisy_reply ();
10241 if (*reply
== '\0')
10242 error (_("Target does not support QDisableRandomization."));
10243 if (strcmp (reply
, "OK") != 0)
10244 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10248 remote_target::extended_remote_run (const std::string
&args
)
10250 struct remote_state
*rs
= get_remote_state ();
10252 const char *remote_exec_file
= get_remote_exec_file ();
10254 /* If the user has disabled vRun support, or we have detected that
10255 support is not available, do not try it. */
10256 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10259 strcpy (rs
->buf
.data (), "vRun;");
10260 len
= strlen (rs
->buf
.data ());
10262 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10263 error (_("Remote file name too long for run packet"));
10264 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10265 strlen (remote_exec_file
));
10267 if (!args
.empty ())
10271 gdb_argv
argv (args
.c_str ());
10272 for (i
= 0; argv
[i
] != NULL
; i
++)
10274 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10275 error (_("Argument list too long for run packet"));
10276 rs
->buf
[len
++] = ';';
10277 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10282 rs
->buf
[len
++] = '\0';
10285 getpkt (&rs
->buf
, 0);
10287 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10290 /* We have a wait response. All is well. */
10292 case PACKET_UNKNOWN
:
10295 if (remote_exec_file
[0] == '\0')
10296 error (_("Running the default executable on the remote target failed; "
10297 "try \"set remote exec-file\"?"));
10299 error (_("Running \"%s\" on the remote target failed"),
10302 gdb_assert_not_reached (_("bad switch"));
10306 /* Helper function to send set/unset environment packets. ACTION is
10307 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10308 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10312 remote_target::send_environment_packet (const char *action
,
10313 const char *packet
,
10316 remote_state
*rs
= get_remote_state ();
10318 /* Convert the environment variable to an hex string, which
10319 is the best format to be transmitted over the wire. */
10320 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10323 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10324 "%s:%s", packet
, encoded_value
.c_str ());
10327 getpkt (&rs
->buf
, 0);
10328 if (strcmp (rs
->buf
.data (), "OK") != 0)
10329 warning (_("Unable to %s environment variable '%s' on remote."),
10333 /* Helper function to handle the QEnvironment* packets. */
10336 remote_target::extended_remote_environment_support ()
10338 remote_state
*rs
= get_remote_state ();
10340 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10342 putpkt ("QEnvironmentReset");
10343 getpkt (&rs
->buf
, 0);
10344 if (strcmp (rs
->buf
.data (), "OK") != 0)
10345 warning (_("Unable to reset environment on remote."));
10348 gdb_environ
*e
= ¤t_inferior ()->environment
;
10350 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10351 for (const std::string
&el
: e
->user_set_env ())
10352 send_environment_packet ("set", "QEnvironmentHexEncoded",
10355 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10356 for (const std::string
&el
: e
->user_unset_env ())
10357 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10360 /* Helper function to set the current working directory for the
10361 inferior in the remote target. */
10364 remote_target::extended_remote_set_inferior_cwd ()
10366 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10368 const char *inferior_cwd
= get_inferior_cwd ();
10369 remote_state
*rs
= get_remote_state ();
10371 if (inferior_cwd
!= NULL
)
10373 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10374 strlen (inferior_cwd
));
10376 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10377 "QSetWorkingDir:%s", hexpath
.c_str ());
10381 /* An empty inferior_cwd means that the user wants us to
10382 reset the remote server's inferior's cwd. */
10383 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10384 "QSetWorkingDir:");
10388 getpkt (&rs
->buf
, 0);
10389 if (packet_ok (rs
->buf
,
10390 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10393 Remote replied unexpectedly while setting the inferior's working\n\
10400 /* In the extended protocol we want to be able to do things like
10401 "run" and have them basically work as expected. So we need
10402 a special create_inferior function. We support changing the
10403 executable file and the command line arguments, but not the
10407 extended_remote_target::create_inferior (const char *exec_file
,
10408 const std::string
&args
,
10409 char **env
, int from_tty
)
10413 struct remote_state
*rs
= get_remote_state ();
10414 const char *remote_exec_file
= get_remote_exec_file ();
10416 /* If running asynchronously, register the target file descriptor
10417 with the event loop. */
10418 if (target_can_async_p ())
10421 /* Disable address space randomization if requested (and supported). */
10422 if (supports_disable_randomization ())
10423 extended_remote_disable_randomization (disable_randomization
);
10425 /* If startup-with-shell is on, we inform gdbserver to start the
10426 remote inferior using a shell. */
10427 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10429 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10430 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10432 getpkt (&rs
->buf
, 0);
10433 if (strcmp (rs
->buf
.data (), "OK") != 0)
10435 Remote replied unexpectedly while setting startup-with-shell: %s"),
10439 extended_remote_environment_support ();
10441 extended_remote_set_inferior_cwd ();
10443 /* Now restart the remote server. */
10444 run_worked
= extended_remote_run (args
) != -1;
10447 /* vRun was not supported. Fail if we need it to do what the
10449 if (remote_exec_file
[0])
10450 error (_("Remote target does not support \"set remote exec-file\""));
10451 if (!args
.empty ())
10452 error (_("Remote target does not support \"set args\" or run ARGS"));
10454 /* Fall back to "R". */
10455 extended_remote_restart ();
10458 /* vRun's success return is a stop reply. */
10459 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10460 add_current_inferior_and_thread (stop_reply
);
10462 /* Get updated offsets, if the stub uses qOffsets. */
10467 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10468 the list of conditions (in agent expression bytecode format), if any, the
10469 target needs to evaluate. The output is placed into the packet buffer
10470 started from BUF and ended at BUF_END. */
10473 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10474 struct bp_target_info
*bp_tgt
, char *buf
,
10477 if (bp_tgt
->conditions
.empty ())
10480 buf
+= strlen (buf
);
10481 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10484 /* Send conditions to the target. */
10485 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10487 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10488 buf
+= strlen (buf
);
10489 for (int i
= 0; i
< aexpr
->len
; ++i
)
10490 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10497 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10498 struct bp_target_info
*bp_tgt
, char *buf
)
10500 if (bp_tgt
->tcommands
.empty ())
10503 buf
+= strlen (buf
);
10505 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10506 buf
+= strlen (buf
);
10508 /* Concatenate all the agent expressions that are commands into the
10510 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10512 sprintf (buf
, "X%x,", aexpr
->len
);
10513 buf
+= strlen (buf
);
10514 for (int i
= 0; i
< aexpr
->len
; ++i
)
10515 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10520 /* Insert a breakpoint. On targets that have software breakpoint
10521 support, we ask the remote target to do the work; on targets
10522 which don't, we insert a traditional memory breakpoint. */
10525 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10526 struct bp_target_info
*bp_tgt
)
10528 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10529 If it succeeds, then set the support to PACKET_ENABLE. If it
10530 fails, and the user has explicitly requested the Z support then
10531 report an error, otherwise, mark it disabled and go on. */
10533 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10535 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10536 struct remote_state
*rs
;
10539 /* Make sure the remote is pointing at the right process, if
10541 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10542 set_general_process ();
10544 rs
= get_remote_state ();
10545 p
= rs
->buf
.data ();
10546 endbuf
= p
+ get_remote_packet_size ();
10551 addr
= (ULONGEST
) remote_address_masked (addr
);
10552 p
+= hexnumstr (p
, addr
);
10553 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10555 if (supports_evaluation_of_breakpoint_conditions ())
10556 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10558 if (can_run_breakpoint_commands ())
10559 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10562 getpkt (&rs
->buf
, 0);
10564 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10570 case PACKET_UNKNOWN
:
10575 /* If this breakpoint has target-side commands but this stub doesn't
10576 support Z0 packets, throw error. */
10577 if (!bp_tgt
->tcommands
.empty ())
10578 throw_error (NOT_SUPPORTED_ERROR
, _("\
10579 Target doesn't support breakpoints that have target side commands."));
10581 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10585 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10586 struct bp_target_info
*bp_tgt
,
10587 enum remove_bp_reason reason
)
10589 CORE_ADDR addr
= bp_tgt
->placed_address
;
10590 struct remote_state
*rs
= get_remote_state ();
10592 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10594 char *p
= rs
->buf
.data ();
10595 char *endbuf
= p
+ get_remote_packet_size ();
10597 /* Make sure the remote is pointing at the right process, if
10599 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10600 set_general_process ();
10606 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10607 p
+= hexnumstr (p
, addr
);
10608 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10611 getpkt (&rs
->buf
, 0);
10613 return (rs
->buf
[0] == 'E');
10616 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10619 static enum Z_packet_type
10620 watchpoint_to_Z_packet (int type
)
10625 return Z_PACKET_WRITE_WP
;
10628 return Z_PACKET_READ_WP
;
10631 return Z_PACKET_ACCESS_WP
;
10634 internal_error (__FILE__
, __LINE__
,
10635 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10640 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10641 enum target_hw_bp_type type
, struct expression
*cond
)
10643 struct remote_state
*rs
= get_remote_state ();
10644 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10646 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10648 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10651 /* Make sure the remote is pointing at the right process, if
10653 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10654 set_general_process ();
10656 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10657 p
= strchr (rs
->buf
.data (), '\0');
10658 addr
= remote_address_masked (addr
);
10659 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10660 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10663 getpkt (&rs
->buf
, 0);
10665 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10669 case PACKET_UNKNOWN
:
10674 internal_error (__FILE__
, __LINE__
,
10675 _("remote_insert_watchpoint: reached end of function"));
10679 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10680 CORE_ADDR start
, int length
)
10682 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10684 return diff
< length
;
10689 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10690 enum target_hw_bp_type type
, struct expression
*cond
)
10692 struct remote_state
*rs
= get_remote_state ();
10693 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10695 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10697 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10700 /* Make sure the remote is pointing at the right process, if
10702 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10703 set_general_process ();
10705 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10706 p
= strchr (rs
->buf
.data (), '\0');
10707 addr
= remote_address_masked (addr
);
10708 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10709 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10711 getpkt (&rs
->buf
, 0);
10713 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10716 case PACKET_UNKNOWN
:
10721 internal_error (__FILE__
, __LINE__
,
10722 _("remote_remove_watchpoint: reached end of function"));
10726 static int remote_hw_watchpoint_limit
= -1;
10727 static int remote_hw_watchpoint_length_limit
= -1;
10728 static int remote_hw_breakpoint_limit
= -1;
10731 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10733 if (remote_hw_watchpoint_length_limit
== 0)
10735 else if (remote_hw_watchpoint_length_limit
< 0)
10737 else if (len
<= remote_hw_watchpoint_length_limit
)
10744 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10746 if (type
== bp_hardware_breakpoint
)
10748 if (remote_hw_breakpoint_limit
== 0)
10750 else if (remote_hw_breakpoint_limit
< 0)
10752 else if (cnt
<= remote_hw_breakpoint_limit
)
10757 if (remote_hw_watchpoint_limit
== 0)
10759 else if (remote_hw_watchpoint_limit
< 0)
10763 else if (cnt
<= remote_hw_watchpoint_limit
)
10769 /* The to_stopped_by_sw_breakpoint method of target remote. */
10772 remote_target::stopped_by_sw_breakpoint ()
10774 struct thread_info
*thread
= inferior_thread ();
10776 return (thread
->priv
!= NULL
10777 && (get_remote_thread_info (thread
)->stop_reason
10778 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10781 /* The to_supports_stopped_by_sw_breakpoint method of target
10785 remote_target::supports_stopped_by_sw_breakpoint ()
10787 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10790 /* The to_stopped_by_hw_breakpoint method of target remote. */
10793 remote_target::stopped_by_hw_breakpoint ()
10795 struct thread_info
*thread
= inferior_thread ();
10797 return (thread
->priv
!= NULL
10798 && (get_remote_thread_info (thread
)->stop_reason
10799 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10802 /* The to_supports_stopped_by_hw_breakpoint method of target
10806 remote_target::supports_stopped_by_hw_breakpoint ()
10808 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10812 remote_target::stopped_by_watchpoint ()
10814 struct thread_info
*thread
= inferior_thread ();
10816 return (thread
->priv
!= NULL
10817 && (get_remote_thread_info (thread
)->stop_reason
10818 == TARGET_STOPPED_BY_WATCHPOINT
));
10822 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10824 struct thread_info
*thread
= inferior_thread ();
10826 if (thread
->priv
!= NULL
10827 && (get_remote_thread_info (thread
)->stop_reason
10828 == TARGET_STOPPED_BY_WATCHPOINT
))
10830 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10839 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10840 struct bp_target_info
*bp_tgt
)
10842 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10843 struct remote_state
*rs
;
10847 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10850 /* Make sure the remote is pointing at the right process, if
10852 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10853 set_general_process ();
10855 rs
= get_remote_state ();
10856 p
= rs
->buf
.data ();
10857 endbuf
= p
+ get_remote_packet_size ();
10863 addr
= remote_address_masked (addr
);
10864 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10865 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10867 if (supports_evaluation_of_breakpoint_conditions ())
10868 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10870 if (can_run_breakpoint_commands ())
10871 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10874 getpkt (&rs
->buf
, 0);
10876 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10879 if (rs
->buf
[1] == '.')
10881 message
= strchr (&rs
->buf
[2], '.');
10883 error (_("Remote failure reply: %s"), message
+ 1);
10886 case PACKET_UNKNOWN
:
10891 internal_error (__FILE__
, __LINE__
,
10892 _("remote_insert_hw_breakpoint: reached end of function"));
10897 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10898 struct bp_target_info
*bp_tgt
)
10901 struct remote_state
*rs
= get_remote_state ();
10902 char *p
= rs
->buf
.data ();
10903 char *endbuf
= p
+ get_remote_packet_size ();
10905 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10908 /* Make sure the remote is pointing at the right process, if
10910 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10911 set_general_process ();
10917 addr
= remote_address_masked (bp_tgt
->placed_address
);
10918 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10919 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10922 getpkt (&rs
->buf
, 0);
10924 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10927 case PACKET_UNKNOWN
:
10932 internal_error (__FILE__
, __LINE__
,
10933 _("remote_remove_hw_breakpoint: reached end of function"));
10936 /* Verify memory using the "qCRC:" request. */
10939 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10941 struct remote_state
*rs
= get_remote_state ();
10942 unsigned long host_crc
, target_crc
;
10945 /* It doesn't make sense to use qCRC if the remote target is
10946 connected but not running. */
10947 if (target_has_execution ()
10948 && packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10950 enum packet_result result
;
10952 /* Make sure the remote is pointing at the right process. */
10953 set_general_process ();
10955 /* FIXME: assumes lma can fit into long. */
10956 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10957 (long) lma
, (long) size
);
10960 /* Be clever; compute the host_crc before waiting for target
10962 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10964 getpkt (&rs
->buf
, 0);
10966 result
= packet_ok (rs
->buf
,
10967 &remote_protocol_packets
[PACKET_qCRC
]);
10968 if (result
== PACKET_ERROR
)
10970 else if (result
== PACKET_OK
)
10972 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10973 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10975 return (host_crc
== target_crc
);
10979 return simple_verify_memory (this, data
, lma
, size
);
10982 /* compare-sections command
10984 With no arguments, compares each loadable section in the exec bfd
10985 with the same memory range on the target, and reports mismatches.
10986 Useful for verifying the image on the target against the exec file. */
10989 compare_sections_command (const char *args
, int from_tty
)
10992 const char *sectname
;
10993 bfd_size_type size
;
10996 int mismatched
= 0;
11000 if (!current_program_space
->exec_bfd ())
11001 error (_("command cannot be used without an exec file"));
11003 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
11009 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
11011 if (!(s
->flags
& SEC_LOAD
))
11012 continue; /* Skip non-loadable section. */
11014 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
11015 continue; /* Skip writeable sections */
11017 size
= bfd_section_size (s
);
11019 continue; /* Skip zero-length section. */
11021 sectname
= bfd_section_name (s
);
11022 if (args
&& strcmp (args
, sectname
) != 0)
11023 continue; /* Not the section selected by user. */
11025 matched
= 1; /* Do this section. */
11028 gdb::byte_vector
sectdata (size
);
11029 bfd_get_section_contents (current_program_space
->exec_bfd (), s
,
11030 sectdata
.data (), 0, size
);
11032 res
= target_verify_memory (sectdata
.data (), lma
, size
);
11035 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
11036 paddress (target_gdbarch (), lma
),
11037 paddress (target_gdbarch (), lma
+ size
));
11039 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
11040 paddress (target_gdbarch (), lma
),
11041 paddress (target_gdbarch (), lma
+ size
));
11043 printf_filtered ("matched.\n");
11046 printf_filtered ("MIS-MATCHED!\n");
11050 if (mismatched
> 0)
11051 warning (_("One or more sections of the target image does not match\n\
11052 the loaded file\n"));
11053 if (args
&& !matched
)
11054 printf_filtered (_("No loaded section named '%s'.\n"), args
);
11057 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
11058 into remote target. The number of bytes written to the remote
11059 target is returned, or -1 for error. */
11062 remote_target::remote_write_qxfer (const char *object_name
,
11063 const char *annex
, const gdb_byte
*writebuf
,
11064 ULONGEST offset
, LONGEST len
,
11065 ULONGEST
*xfered_len
,
11066 struct packet_config
*packet
)
11070 struct remote_state
*rs
= get_remote_state ();
11071 int max_size
= get_memory_write_packet_size ();
11073 if (packet_config_support (packet
) == PACKET_DISABLE
)
11074 return TARGET_XFER_E_IO
;
11076 /* Insert header. */
11077 i
= snprintf (rs
->buf
.data (), max_size
,
11078 "qXfer:%s:write:%s:%s:",
11079 object_name
, annex
? annex
: "",
11080 phex_nz (offset
, sizeof offset
));
11081 max_size
-= (i
+ 1);
11083 /* Escape as much data as fits into rs->buf. */
11084 buf_len
= remote_escape_output
11085 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
11087 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
11088 || getpkt_sane (&rs
->buf
, 0) < 0
11089 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11090 return TARGET_XFER_E_IO
;
11092 unpack_varlen_hex (rs
->buf
.data (), &n
);
11095 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11098 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
11099 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
11100 number of bytes read is returned, or 0 for EOF, or -1 for error.
11101 The number of bytes read may be less than LEN without indicating an
11102 EOF. PACKET is checked and updated to indicate whether the remote
11103 target supports this object. */
11106 remote_target::remote_read_qxfer (const char *object_name
,
11108 gdb_byte
*readbuf
, ULONGEST offset
,
11110 ULONGEST
*xfered_len
,
11111 struct packet_config
*packet
)
11113 struct remote_state
*rs
= get_remote_state ();
11114 LONGEST i
, n
, packet_len
;
11116 if (packet_config_support (packet
) == PACKET_DISABLE
)
11117 return TARGET_XFER_E_IO
;
11119 /* Check whether we've cached an end-of-object packet that matches
11121 if (rs
->finished_object
)
11123 if (strcmp (object_name
, rs
->finished_object
) == 0
11124 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
11125 && offset
== rs
->finished_offset
)
11126 return TARGET_XFER_EOF
;
11129 /* Otherwise, we're now reading something different. Discard
11131 xfree (rs
->finished_object
);
11132 xfree (rs
->finished_annex
);
11133 rs
->finished_object
= NULL
;
11134 rs
->finished_annex
= NULL
;
11137 /* Request only enough to fit in a single packet. The actual data
11138 may not, since we don't know how much of it will need to be escaped;
11139 the target is free to respond with slightly less data. We subtract
11140 five to account for the response type and the protocol frame. */
11141 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
11142 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
11143 "qXfer:%s:read:%s:%s,%s",
11144 object_name
, annex
? annex
: "",
11145 phex_nz (offset
, sizeof offset
),
11146 phex_nz (n
, sizeof n
));
11147 i
= putpkt (rs
->buf
);
11149 return TARGET_XFER_E_IO
;
11152 packet_len
= getpkt_sane (&rs
->buf
, 0);
11153 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11154 return TARGET_XFER_E_IO
;
11156 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
11157 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
11159 /* 'm' means there is (or at least might be) more data after this
11160 batch. That does not make sense unless there's at least one byte
11161 of data in this reply. */
11162 if (rs
->buf
[0] == 'm' && packet_len
== 1)
11163 error (_("Remote qXfer reply contained no data."));
11165 /* Got some data. */
11166 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
11167 packet_len
- 1, readbuf
, n
);
11169 /* 'l' is an EOF marker, possibly including a final block of data,
11170 or possibly empty. If we have the final block of a non-empty
11171 object, record this fact to bypass a subsequent partial read. */
11172 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
11174 rs
->finished_object
= xstrdup (object_name
);
11175 rs
->finished_annex
= xstrdup (annex
? annex
: "");
11176 rs
->finished_offset
= offset
+ i
;
11180 return TARGET_XFER_EOF
;
11184 return TARGET_XFER_OK
;
11188 enum target_xfer_status
11189 remote_target::xfer_partial (enum target_object object
,
11190 const char *annex
, gdb_byte
*readbuf
,
11191 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
11192 ULONGEST
*xfered_len
)
11194 struct remote_state
*rs
;
11198 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
11200 set_remote_traceframe ();
11201 set_general_thread (inferior_ptid
);
11203 rs
= get_remote_state ();
11205 /* Handle memory using the standard memory routines. */
11206 if (object
== TARGET_OBJECT_MEMORY
)
11208 /* If the remote target is connected but not running, we should
11209 pass this request down to a lower stratum (e.g. the executable
11211 if (!target_has_execution ())
11212 return TARGET_XFER_EOF
;
11214 if (writebuf
!= NULL
)
11215 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
11218 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
11222 /* Handle extra signal info using qxfer packets. */
11223 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
11226 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
11227 xfered_len
, &remote_protocol_packets
11228 [PACKET_qXfer_siginfo_read
]);
11230 return remote_write_qxfer ("siginfo", annex
,
11231 writebuf
, offset
, len
, xfered_len
,
11232 &remote_protocol_packets
11233 [PACKET_qXfer_siginfo_write
]);
11236 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
11239 return remote_read_qxfer ("statictrace", annex
,
11240 readbuf
, offset
, len
, xfered_len
,
11241 &remote_protocol_packets
11242 [PACKET_qXfer_statictrace_read
]);
11244 return TARGET_XFER_E_IO
;
11247 /* Only handle flash writes. */
11248 if (writebuf
!= NULL
)
11252 case TARGET_OBJECT_FLASH
:
11253 return remote_flash_write (offset
, len
, xfered_len
,
11257 return TARGET_XFER_E_IO
;
11261 /* Map pre-existing objects onto letters. DO NOT do this for new
11262 objects!!! Instead specify new query packets. */
11265 case TARGET_OBJECT_AVR
:
11269 case TARGET_OBJECT_AUXV
:
11270 gdb_assert (annex
== NULL
);
11271 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
11273 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
11275 case TARGET_OBJECT_AVAILABLE_FEATURES
:
11276 return remote_read_qxfer
11277 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
11278 &remote_protocol_packets
[PACKET_qXfer_features
]);
11280 case TARGET_OBJECT_LIBRARIES
:
11281 return remote_read_qxfer
11282 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
11283 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
11285 case TARGET_OBJECT_LIBRARIES_SVR4
:
11286 return remote_read_qxfer
11287 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
11288 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
11290 case TARGET_OBJECT_MEMORY_MAP
:
11291 gdb_assert (annex
== NULL
);
11292 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
11294 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
11296 case TARGET_OBJECT_OSDATA
:
11297 /* Should only get here if we're connected. */
11298 gdb_assert (rs
->remote_desc
);
11299 return remote_read_qxfer
11300 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
11301 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
11303 case TARGET_OBJECT_THREADS
:
11304 gdb_assert (annex
== NULL
);
11305 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
11307 &remote_protocol_packets
[PACKET_qXfer_threads
]);
11309 case TARGET_OBJECT_TRACEFRAME_INFO
:
11310 gdb_assert (annex
== NULL
);
11311 return remote_read_qxfer
11312 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11313 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11315 case TARGET_OBJECT_FDPIC
:
11316 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11318 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11320 case TARGET_OBJECT_OPENVMS_UIB
:
11321 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11323 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11325 case TARGET_OBJECT_BTRACE
:
11326 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11328 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11330 case TARGET_OBJECT_BTRACE_CONF
:
11331 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11333 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11335 case TARGET_OBJECT_EXEC_FILE
:
11336 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11338 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11341 return TARGET_XFER_E_IO
;
11344 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11345 large enough let the caller deal with it. */
11346 if (len
< get_remote_packet_size ())
11347 return TARGET_XFER_E_IO
;
11348 len
= get_remote_packet_size ();
11350 /* Except for querying the minimum buffer size, target must be open. */
11351 if (!rs
->remote_desc
)
11352 error (_("remote query is only available after target open"));
11354 gdb_assert (annex
!= NULL
);
11355 gdb_assert (readbuf
!= NULL
);
11357 p2
= rs
->buf
.data ();
11359 *p2
++ = query_type
;
11361 /* We used one buffer char for the remote protocol q command and
11362 another for the query type. As the remote protocol encapsulation
11363 uses 4 chars plus one extra in case we are debugging
11364 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11367 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11369 /* Bad caller may have sent forbidden characters. */
11370 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11375 gdb_assert (annex
[i
] == '\0');
11377 i
= putpkt (rs
->buf
);
11379 return TARGET_XFER_E_IO
;
11381 getpkt (&rs
->buf
, 0);
11382 strcpy ((char *) readbuf
, rs
->buf
.data ());
11384 *xfered_len
= strlen ((char *) readbuf
);
11385 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11388 /* Implementation of to_get_memory_xfer_limit. */
11391 remote_target::get_memory_xfer_limit ()
11393 return get_memory_write_packet_size ();
11397 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11398 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11399 CORE_ADDR
*found_addrp
)
11401 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11402 struct remote_state
*rs
= get_remote_state ();
11403 int max_size
= get_memory_write_packet_size ();
11404 struct packet_config
*packet
=
11405 &remote_protocol_packets
[PACKET_qSearch_memory
];
11406 /* Number of packet bytes used to encode the pattern;
11407 this could be more than PATTERN_LEN due to escape characters. */
11408 int escaped_pattern_len
;
11409 /* Amount of pattern that was encodable in the packet. */
11410 int used_pattern_len
;
11413 ULONGEST found_addr
;
11415 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
11417 return (target_read (this, TARGET_OBJECT_MEMORY
, NULL
, result
, addr
, len
)
11421 /* Don't go to the target if we don't have to. This is done before
11422 checking packet_config_support to avoid the possibility that a
11423 success for this edge case means the facility works in
11425 if (pattern_len
> search_space_len
)
11427 if (pattern_len
== 0)
11429 *found_addrp
= start_addr
;
11433 /* If we already know the packet isn't supported, fall back to the simple
11434 way of searching memory. */
11436 if (packet_config_support (packet
) == PACKET_DISABLE
)
11438 /* Target doesn't provided special support, fall back and use the
11439 standard support (copy memory and do the search here). */
11440 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11441 pattern
, pattern_len
, found_addrp
);
11444 /* Make sure the remote is pointing at the right process. */
11445 set_general_process ();
11447 /* Insert header. */
11448 i
= snprintf (rs
->buf
.data (), max_size
,
11449 "qSearch:memory:%s;%s;",
11450 phex_nz (start_addr
, addr_size
),
11451 phex_nz (search_space_len
, sizeof (search_space_len
)));
11452 max_size
-= (i
+ 1);
11454 /* Escape as much data as fits into rs->buf. */
11455 escaped_pattern_len
=
11456 remote_escape_output (pattern
, pattern_len
, 1,
11457 (gdb_byte
*) rs
->buf
.data () + i
,
11458 &used_pattern_len
, max_size
);
11460 /* Bail if the pattern is too large. */
11461 if (used_pattern_len
!= pattern_len
)
11462 error (_("Pattern is too large to transmit to remote target."));
11464 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11465 || getpkt_sane (&rs
->buf
, 0) < 0
11466 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11468 /* The request may not have worked because the command is not
11469 supported. If so, fall back to the simple way. */
11470 if (packet_config_support (packet
) == PACKET_DISABLE
)
11472 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11473 pattern
, pattern_len
, found_addrp
);
11478 if (rs
->buf
[0] == '0')
11480 else if (rs
->buf
[0] == '1')
11483 if (rs
->buf
[1] != ',')
11484 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11485 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11486 *found_addrp
= found_addr
;
11489 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11495 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11497 struct remote_state
*rs
= get_remote_state ();
11498 char *p
= rs
->buf
.data ();
11500 if (!rs
->remote_desc
)
11501 error (_("remote rcmd is only available after target open"));
11503 /* Send a NULL command across as an empty command. */
11504 if (command
== NULL
)
11507 /* The query prefix. */
11508 strcpy (rs
->buf
.data (), "qRcmd,");
11509 p
= strchr (rs
->buf
.data (), '\0');
11511 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11512 > get_remote_packet_size ())
11513 error (_("\"monitor\" command ``%s'' is too long."), command
);
11515 /* Encode the actual command. */
11516 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11518 if (putpkt (rs
->buf
) < 0)
11519 error (_("Communication problem with target."));
11521 /* get/display the response */
11526 /* XXX - see also remote_get_noisy_reply(). */
11527 QUIT
; /* Allow user to bail out with ^C. */
11529 if (getpkt_sane (&rs
->buf
, 0) == -1)
11531 /* Timeout. Continue to (try to) read responses.
11532 This is better than stopping with an error, assuming the stub
11533 is still executing the (long) monitor command.
11534 If needed, the user can interrupt gdb using C-c, obtaining
11535 an effect similar to stop on timeout. */
11538 buf
= rs
->buf
.data ();
11539 if (buf
[0] == '\0')
11540 error (_("Target does not support this command."));
11541 if (buf
[0] == 'O' && buf
[1] != 'K')
11543 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11546 if (strcmp (buf
, "OK") == 0)
11548 if (strlen (buf
) == 3 && buf
[0] == 'E'
11549 && isdigit (buf
[1]) && isdigit (buf
[2]))
11551 error (_("Protocol error with Rcmd"));
11553 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11555 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11557 fputc_unfiltered (c
, outbuf
);
11563 std::vector
<mem_region
>
11564 remote_target::memory_map ()
11566 std::vector
<mem_region
> result
;
11567 gdb::optional
<gdb::char_vector
> text
11568 = target_read_stralloc (current_inferior ()->top_target (),
11569 TARGET_OBJECT_MEMORY_MAP
, NULL
);
11572 result
= parse_memory_map (text
->data ());
11578 packet_command (const char *args
, int from_tty
)
11580 remote_target
*remote
= get_current_remote_target ();
11582 if (remote
== nullptr)
11583 error (_("command can only be used with remote target"));
11585 remote
->packet_command (args
, from_tty
);
11589 remote_target::packet_command (const char *args
, int from_tty
)
11592 error (_("remote-packet command requires packet text as argument"));
11594 puts_filtered ("sending: ");
11595 print_packet (args
);
11596 puts_filtered ("\n");
11599 remote_state
*rs
= get_remote_state ();
11601 getpkt (&rs
->buf
, 0);
11602 puts_filtered ("received: ");
11603 print_packet (rs
->buf
.data ());
11604 puts_filtered ("\n");
11608 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11610 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11612 static void threadset_test_cmd (char *cmd
, int tty
);
11614 static void threadalive_test (char *cmd
, int tty
);
11616 static void threadlist_test_cmd (char *cmd
, int tty
);
11618 int get_and_display_threadinfo (threadref
*ref
);
11620 static void threadinfo_test_cmd (char *cmd
, int tty
);
11622 static int thread_display_step (threadref
*ref
, void *context
);
11624 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11626 static void init_remote_threadtests (void);
11628 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11631 threadset_test_cmd (const char *cmd
, int tty
)
11633 int sample_thread
= SAMPLE_THREAD
;
11635 printf_filtered (_("Remote threadset test\n"));
11636 set_general_thread (sample_thread
);
11641 threadalive_test (const char *cmd
, int tty
)
11643 int sample_thread
= SAMPLE_THREAD
;
11644 int pid
= inferior_ptid
.pid ();
11645 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11647 if (remote_thread_alive (ptid
))
11648 printf_filtered ("PASS: Thread alive test\n");
11650 printf_filtered ("FAIL: Thread alive test\n");
11653 void output_threadid (char *title
, threadref
*ref
);
11656 output_threadid (char *title
, threadref
*ref
)
11660 pack_threadid (&hexid
[0], ref
); /* Convert thread id into hex. */
11662 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11666 threadlist_test_cmd (const char *cmd
, int tty
)
11669 threadref nextthread
;
11670 int done
, result_count
;
11671 threadref threadlist
[3];
11673 printf_filtered ("Remote Threadlist test\n");
11674 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11675 &result_count
, &threadlist
[0]))
11676 printf_filtered ("FAIL: threadlist test\n");
11679 threadref
*scan
= threadlist
;
11680 threadref
*limit
= scan
+ result_count
;
11682 while (scan
< limit
)
11683 output_threadid (" thread ", scan
++);
11688 display_thread_info (struct gdb_ext_thread_info
*info
)
11690 output_threadid ("Threadid: ", &info
->threadid
);
11691 printf_filtered ("Name: %s\n ", info
->shortname
);
11692 printf_filtered ("State: %s\n", info
->display
);
11693 printf_filtered ("other: %s\n\n", info
->more_display
);
11697 get_and_display_threadinfo (threadref
*ref
)
11701 struct gdb_ext_thread_info threadinfo
;
11703 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11704 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11705 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11706 display_thread_info (&threadinfo
);
11711 threadinfo_test_cmd (const char *cmd
, int tty
)
11713 int athread
= SAMPLE_THREAD
;
11717 int_to_threadref (&thread
, athread
);
11718 printf_filtered ("Remote Threadinfo test\n");
11719 if (!get_and_display_threadinfo (&thread
))
11720 printf_filtered ("FAIL cannot get thread info\n");
11724 thread_display_step (threadref
*ref
, void *context
)
11726 /* output_threadid(" threadstep ",ref); *//* simple test */
11727 return get_and_display_threadinfo (ref
);
11731 threadlist_update_test_cmd (const char *cmd
, int tty
)
11733 printf_filtered ("Remote Threadlist update test\n");
11734 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11738 init_remote_threadtests (void)
11740 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11741 _("Fetch and print the remote list of "
11742 "thread identifiers, one pkt only."));
11743 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11744 _("Fetch and display info about one thread."));
11745 add_com ("tset", class_obscure
, threadset_test_cmd
,
11746 _("Test setting to a different thread."));
11747 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11748 _("Iterate through updating all remote thread info."));
11749 add_com ("talive", class_obscure
, threadalive_test
,
11750 _("Remote thread alive test."));
11755 /* Convert a thread ID to a string. */
11758 remote_target::pid_to_str (ptid_t ptid
)
11760 struct remote_state
*rs
= get_remote_state ();
11762 if (ptid
== null_ptid
)
11763 return normal_pid_to_str (ptid
);
11764 else if (ptid
.is_pid ())
11766 /* Printing an inferior target id. */
11768 /* When multi-process extensions are off, there's no way in the
11769 remote protocol to know the remote process id, if there's any
11770 at all. There's one exception --- when we're connected with
11771 target extended-remote, and we manually attached to a process
11772 with "attach PID". We don't record anywhere a flag that
11773 allows us to distinguish that case from the case of
11774 connecting with extended-remote and the stub already being
11775 attached to a process, and reporting yes to qAttached, hence
11776 no smart special casing here. */
11777 if (!remote_multi_process_p (rs
))
11778 return "Remote target";
11780 return normal_pid_to_str (ptid
);
11784 if (magic_null_ptid
== ptid
)
11785 return "Thread <main>";
11786 else if (remote_multi_process_p (rs
))
11787 if (ptid
.lwp () == 0)
11788 return normal_pid_to_str (ptid
);
11790 return string_printf ("Thread %d.%ld",
11791 ptid
.pid (), ptid
.lwp ());
11793 return string_printf ("Thread %ld", ptid
.lwp ());
11797 /* Get the address of the thread local variable in OBJFILE which is
11798 stored at OFFSET within the thread local storage for thread PTID. */
11801 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11804 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11806 struct remote_state
*rs
= get_remote_state ();
11807 char *p
= rs
->buf
.data ();
11808 char *endp
= p
+ get_remote_packet_size ();
11809 enum packet_result result
;
11811 strcpy (p
, "qGetTLSAddr:");
11813 p
= write_ptid (p
, endp
, ptid
);
11815 p
+= hexnumstr (p
, offset
);
11817 p
+= hexnumstr (p
, lm
);
11821 getpkt (&rs
->buf
, 0);
11822 result
= packet_ok (rs
->buf
,
11823 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11824 if (result
== PACKET_OK
)
11828 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11831 else if (result
== PACKET_UNKNOWN
)
11832 throw_error (TLS_GENERIC_ERROR
,
11833 _("Remote target doesn't support qGetTLSAddr packet"));
11835 throw_error (TLS_GENERIC_ERROR
,
11836 _("Remote target failed to process qGetTLSAddr request"));
11839 throw_error (TLS_GENERIC_ERROR
,
11840 _("TLS not supported or disabled on this target"));
11845 /* Provide thread local base, i.e. Thread Information Block address.
11846 Returns 1 if ptid is found and thread_local_base is non zero. */
11849 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11851 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11853 struct remote_state
*rs
= get_remote_state ();
11854 char *p
= rs
->buf
.data ();
11855 char *endp
= p
+ get_remote_packet_size ();
11856 enum packet_result result
;
11858 strcpy (p
, "qGetTIBAddr:");
11860 p
= write_ptid (p
, endp
, ptid
);
11864 getpkt (&rs
->buf
, 0);
11865 result
= packet_ok (rs
->buf
,
11866 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11867 if (result
== PACKET_OK
)
11870 unpack_varlen_hex (rs
->buf
.data (), &val
);
11872 *addr
= (CORE_ADDR
) val
;
11875 else if (result
== PACKET_UNKNOWN
)
11876 error (_("Remote target doesn't support qGetTIBAddr packet"));
11878 error (_("Remote target failed to process qGetTIBAddr request"));
11881 error (_("qGetTIBAddr not supported or disabled on this target"));
11886 /* Support for inferring a target description based on the current
11887 architecture and the size of a 'g' packet. While the 'g' packet
11888 can have any size (since optional registers can be left off the
11889 end), some sizes are easily recognizable given knowledge of the
11890 approximate architecture. */
11892 struct remote_g_packet_guess
11894 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11901 const struct target_desc
*tdesc
;
11904 struct remote_g_packet_data
: public allocate_on_obstack
11906 std::vector
<remote_g_packet_guess
> guesses
;
11909 static struct gdbarch_data
*remote_g_packet_data_handle
;
11912 remote_g_packet_data_init (struct obstack
*obstack
)
11914 return new (obstack
) remote_g_packet_data
;
11918 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11919 const struct target_desc
*tdesc
)
11921 struct remote_g_packet_data
*data
11922 = ((struct remote_g_packet_data
*)
11923 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11925 gdb_assert (tdesc
!= NULL
);
11927 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11928 if (guess
.bytes
== bytes
)
11929 internal_error (__FILE__
, __LINE__
,
11930 _("Duplicate g packet description added for size %d"),
11933 data
->guesses
.emplace_back (bytes
, tdesc
);
11936 /* Return true if remote_read_description would do anything on this target
11937 and architecture, false otherwise. */
11940 remote_read_description_p (struct target_ops
*target
)
11942 struct remote_g_packet_data
*data
11943 = ((struct remote_g_packet_data
*)
11944 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11946 return !data
->guesses
.empty ();
11949 const struct target_desc
*
11950 remote_target::read_description ()
11952 struct remote_g_packet_data
*data
11953 = ((struct remote_g_packet_data
*)
11954 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11956 /* Do not try this during initial connection, when we do not know
11957 whether there is a running but stopped thread. */
11958 if (!target_has_execution () || inferior_ptid
== null_ptid
)
11959 return beneath ()->read_description ();
11961 if (!data
->guesses
.empty ())
11963 int bytes
= send_g_packet ();
11965 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11966 if (guess
.bytes
== bytes
)
11967 return guess
.tdesc
;
11969 /* We discard the g packet. A minor optimization would be to
11970 hold on to it, and fill the register cache once we have selected
11971 an architecture, but it's too tricky to do safely. */
11974 return beneath ()->read_description ();
11977 /* Remote file transfer support. This is host-initiated I/O, not
11978 target-initiated; for target-initiated, see remote-fileio.c. */
11980 /* If *LEFT is at least the length of STRING, copy STRING to
11981 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11982 decrease *LEFT. Otherwise raise an error. */
11985 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11987 int len
= strlen (string
);
11990 error (_("Packet too long for target."));
11992 memcpy (*buffer
, string
, len
);
11996 /* NUL-terminate the buffer as a convenience, if there is
12002 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
12003 *BUFFER, update *BUFFER to point to the new end of the buffer, and
12004 decrease *LEFT. Otherwise raise an error. */
12007 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
12010 if (2 * len
> *left
)
12011 error (_("Packet too long for target."));
12013 bin2hex (bytes
, *buffer
, len
);
12014 *buffer
+= 2 * len
;
12017 /* NUL-terminate the buffer as a convenience, if there is
12023 /* If *LEFT is large enough, convert VALUE to hex and add it to
12024 *BUFFER, update *BUFFER to point to the new end of the buffer, and
12025 decrease *LEFT. Otherwise raise an error. */
12028 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
12030 int len
= hexnumlen (value
);
12033 error (_("Packet too long for target."));
12035 hexnumstr (*buffer
, value
);
12039 /* NUL-terminate the buffer as a convenience, if there is
12045 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
12046 value, *REMOTE_ERRNO to the remote error number or zero if none
12047 was included, and *ATTACHMENT to point to the start of the annex
12048 if any. The length of the packet isn't needed here; there may
12049 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
12051 Return 0 if the packet could be parsed, -1 if it could not. If
12052 -1 is returned, the other variables may not be initialized. */
12055 remote_hostio_parse_result (const char *buffer
, int *retcode
,
12056 int *remote_errno
, const char **attachment
)
12061 *attachment
= NULL
;
12063 if (buffer
[0] != 'F')
12067 *retcode
= strtol (&buffer
[1], &p
, 16);
12068 if (errno
!= 0 || p
== &buffer
[1])
12071 /* Check for ",errno". */
12075 *remote_errno
= strtol (p
+ 1, &p2
, 16);
12076 if (errno
!= 0 || p
+ 1 == p2
)
12081 /* Check for ";attachment". If there is no attachment, the
12082 packet should end here. */
12085 *attachment
= p
+ 1;
12088 else if (*p
== '\0')
12094 /* Send a prepared I/O packet to the target and read its response.
12095 The prepared packet is in the global RS->BUF before this function
12096 is called, and the answer is there when we return.
12098 COMMAND_BYTES is the length of the request to send, which may include
12099 binary data. WHICH_PACKET is the packet configuration to check
12100 before attempting a packet. If an error occurs, *REMOTE_ERRNO
12101 is set to the error number and -1 is returned. Otherwise the value
12102 returned by the function is returned.
12104 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
12105 attachment is expected; an error will be reported if there's a
12106 mismatch. If one is found, *ATTACHMENT will be set to point into
12107 the packet buffer and *ATTACHMENT_LEN will be set to the
12108 attachment's length. */
12111 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
12112 int *remote_errno
, const char **attachment
,
12113 int *attachment_len
)
12115 struct remote_state
*rs
= get_remote_state ();
12116 int ret
, bytes_read
;
12117 const char *attachment_tmp
;
12119 if (packet_support (which_packet
) == PACKET_DISABLE
)
12121 *remote_errno
= FILEIO_ENOSYS
;
12125 putpkt_binary (rs
->buf
.data (), command_bytes
);
12126 bytes_read
= getpkt_sane (&rs
->buf
, 0);
12128 /* If it timed out, something is wrong. Don't try to parse the
12130 if (bytes_read
< 0)
12132 *remote_errno
= FILEIO_EINVAL
;
12136 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
12139 *remote_errno
= FILEIO_EINVAL
;
12141 case PACKET_UNKNOWN
:
12142 *remote_errno
= FILEIO_ENOSYS
;
12148 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
12151 *remote_errno
= FILEIO_EINVAL
;
12155 /* Make sure we saw an attachment if and only if we expected one. */
12156 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
12157 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
12159 *remote_errno
= FILEIO_EINVAL
;
12163 /* If an attachment was found, it must point into the packet buffer;
12164 work out how many bytes there were. */
12165 if (attachment_tmp
!= NULL
)
12167 *attachment
= attachment_tmp
;
12168 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
12174 /* See declaration.h. */
12177 readahead_cache::invalidate ()
12182 /* See declaration.h. */
12185 readahead_cache::invalidate_fd (int fd
)
12187 if (this->fd
== fd
)
12191 /* Set the filesystem remote_hostio functions that take FILENAME
12192 arguments will use. Return 0 on success, or -1 if an error
12193 occurs (and set *REMOTE_ERRNO). */
12196 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
12199 struct remote_state
*rs
= get_remote_state ();
12200 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
12201 char *p
= rs
->buf
.data ();
12202 int left
= get_remote_packet_size () - 1;
12206 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12209 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
12212 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
12214 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
12215 remote_buffer_add_string (&p
, &left
, arg
);
12217 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
12218 remote_errno
, NULL
, NULL
);
12220 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12224 rs
->fs_pid
= required_pid
;
12229 /* Implementation of to_fileio_open. */
12232 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
12233 int flags
, int mode
, int warn_if_slow
,
12236 struct remote_state
*rs
= get_remote_state ();
12237 char *p
= rs
->buf
.data ();
12238 int left
= get_remote_packet_size () - 1;
12242 static int warning_issued
= 0;
12244 printf_unfiltered (_("Reading %s from remote target...\n"),
12247 if (!warning_issued
)
12249 warning (_("File transfers from remote targets can be slow."
12250 " Use \"set sysroot\" to access files locally"
12252 warning_issued
= 1;
12256 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12259 remote_buffer_add_string (&p
, &left
, "vFile:open:");
12261 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12262 strlen (filename
));
12263 remote_buffer_add_string (&p
, &left
, ",");
12265 remote_buffer_add_int (&p
, &left
, flags
);
12266 remote_buffer_add_string (&p
, &left
, ",");
12268 remote_buffer_add_int (&p
, &left
, mode
);
12270 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
12271 remote_errno
, NULL
, NULL
);
12275 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
12276 int flags
, int mode
, int warn_if_slow
,
12279 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
12283 /* Implementation of to_fileio_pwrite. */
12286 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12287 ULONGEST offset
, int *remote_errno
)
12289 struct remote_state
*rs
= get_remote_state ();
12290 char *p
= rs
->buf
.data ();
12291 int left
= get_remote_packet_size ();
12294 rs
->readahead_cache
.invalidate_fd (fd
);
12296 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
12298 remote_buffer_add_int (&p
, &left
, fd
);
12299 remote_buffer_add_string (&p
, &left
, ",");
12301 remote_buffer_add_int (&p
, &left
, offset
);
12302 remote_buffer_add_string (&p
, &left
, ",");
12304 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
12305 (get_remote_packet_size ()
12306 - (p
- rs
->buf
.data ())));
12308 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
12309 remote_errno
, NULL
, NULL
);
12313 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12314 ULONGEST offset
, int *remote_errno
)
12316 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12319 /* Helper for the implementation of to_fileio_pread. Read the file
12320 from the remote side with vFile:pread. */
12323 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12324 ULONGEST offset
, int *remote_errno
)
12326 struct remote_state
*rs
= get_remote_state ();
12327 char *p
= rs
->buf
.data ();
12328 const char *attachment
;
12329 int left
= get_remote_packet_size ();
12330 int ret
, attachment_len
;
12333 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12335 remote_buffer_add_int (&p
, &left
, fd
);
12336 remote_buffer_add_string (&p
, &left
, ",");
12338 remote_buffer_add_int (&p
, &left
, len
);
12339 remote_buffer_add_string (&p
, &left
, ",");
12341 remote_buffer_add_int (&p
, &left
, offset
);
12343 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
12344 remote_errno
, &attachment
,
12350 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12352 if (read_len
!= ret
)
12353 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12358 /* See declaration.h. */
12361 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12365 && this->offset
<= offset
12366 && offset
< this->offset
+ this->bufsize
)
12368 ULONGEST max
= this->offset
+ this->bufsize
;
12370 if (offset
+ len
> max
)
12371 len
= max
- offset
;
12373 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12380 /* Implementation of to_fileio_pread. */
12383 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12384 ULONGEST offset
, int *remote_errno
)
12387 struct remote_state
*rs
= get_remote_state ();
12388 readahead_cache
*cache
= &rs
->readahead_cache
;
12390 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12393 cache
->hit_count
++;
12395 remote_debug_printf ("readahead cache hit %s",
12396 pulongest (cache
->hit_count
));
12400 cache
->miss_count
++;
12402 remote_debug_printf ("readahead cache miss %s",
12403 pulongest (cache
->miss_count
));
12406 cache
->offset
= offset
;
12407 cache
->bufsize
= get_remote_packet_size ();
12408 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12410 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12411 cache
->offset
, remote_errno
);
12414 cache
->invalidate_fd (fd
);
12418 cache
->bufsize
= ret
;
12419 return cache
->pread (fd
, read_buf
, len
, offset
);
12423 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12424 ULONGEST offset
, int *remote_errno
)
12426 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12429 /* Implementation of to_fileio_close. */
12432 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12434 struct remote_state
*rs
= get_remote_state ();
12435 char *p
= rs
->buf
.data ();
12436 int left
= get_remote_packet_size () - 1;
12438 rs
->readahead_cache
.invalidate_fd (fd
);
12440 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12442 remote_buffer_add_int (&p
, &left
, fd
);
12444 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12445 remote_errno
, NULL
, NULL
);
12449 remote_target::fileio_close (int fd
, int *remote_errno
)
12451 return remote_hostio_close (fd
, remote_errno
);
12454 /* Implementation of to_fileio_unlink. */
12457 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12460 struct remote_state
*rs
= get_remote_state ();
12461 char *p
= rs
->buf
.data ();
12462 int left
= get_remote_packet_size () - 1;
12464 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12467 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12469 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12470 strlen (filename
));
12472 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12473 remote_errno
, NULL
, NULL
);
12477 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12480 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12483 /* Implementation of to_fileio_readlink. */
12485 gdb::optional
<std::string
>
12486 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12489 struct remote_state
*rs
= get_remote_state ();
12490 char *p
= rs
->buf
.data ();
12491 const char *attachment
;
12492 int left
= get_remote_packet_size ();
12493 int len
, attachment_len
;
12496 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12499 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12501 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12502 strlen (filename
));
12504 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12505 remote_errno
, &attachment
,
12511 std::string
ret (len
, '\0');
12513 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12514 (gdb_byte
*) &ret
[0], len
);
12515 if (read_len
!= len
)
12516 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12521 /* Implementation of to_fileio_fstat. */
12524 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12526 struct remote_state
*rs
= get_remote_state ();
12527 char *p
= rs
->buf
.data ();
12528 int left
= get_remote_packet_size ();
12529 int attachment_len
, ret
;
12530 const char *attachment
;
12531 struct fio_stat fst
;
12534 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12536 remote_buffer_add_int (&p
, &left
, fd
);
12538 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12539 remote_errno
, &attachment
,
12543 if (*remote_errno
!= FILEIO_ENOSYS
)
12546 /* Strictly we should return -1, ENOSYS here, but when
12547 "set sysroot remote:" was implemented in August 2008
12548 BFD's need for a stat function was sidestepped with
12549 this hack. This was not remedied until March 2015
12550 so we retain the previous behavior to avoid breaking
12553 Note that the memset is a March 2015 addition; older
12554 GDBs set st_size *and nothing else* so the structure
12555 would have garbage in all other fields. This might
12556 break something but retaining the previous behavior
12557 here would be just too wrong. */
12559 memset (st
, 0, sizeof (struct stat
));
12560 st
->st_size
= INT_MAX
;
12564 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12565 (gdb_byte
*) &fst
, sizeof (fst
));
12567 if (read_len
!= ret
)
12568 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12570 if (read_len
!= sizeof (fst
))
12571 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12572 read_len
, (int) sizeof (fst
));
12574 remote_fileio_to_host_stat (&fst
, st
);
12579 /* Implementation of to_filesystem_is_local. */
12582 remote_target::filesystem_is_local ()
12584 /* Valgrind GDB presents itself as a remote target but works
12585 on the local filesystem: it does not implement remote get
12586 and users are not expected to set a sysroot. To handle
12587 this case we treat the remote filesystem as local if the
12588 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12589 does not support vFile:open. */
12590 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12592 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12594 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12596 int fd
, remote_errno
;
12598 /* Try opening a file to probe support. The supplied
12599 filename is irrelevant, we only care about whether
12600 the stub recognizes the packet or not. */
12601 fd
= remote_hostio_open (NULL
, "just probing",
12602 FILEIO_O_RDONLY
, 0700, 0,
12606 remote_hostio_close (fd
, &remote_errno
);
12608 ps
= packet_support (PACKET_vFile_open
);
12611 if (ps
== PACKET_DISABLE
)
12613 static int warning_issued
= 0;
12615 if (!warning_issued
)
12617 warning (_("remote target does not support file"
12618 " transfer, attempting to access files"
12619 " from local filesystem."));
12620 warning_issued
= 1;
12631 remote_fileio_errno_to_host (int errnum
)
12637 case FILEIO_ENOENT
:
12645 case FILEIO_EACCES
:
12647 case FILEIO_EFAULT
:
12651 case FILEIO_EEXIST
:
12653 case FILEIO_ENODEV
:
12655 case FILEIO_ENOTDIR
:
12657 case FILEIO_EISDIR
:
12659 case FILEIO_EINVAL
:
12661 case FILEIO_ENFILE
:
12663 case FILEIO_EMFILE
:
12667 case FILEIO_ENOSPC
:
12669 case FILEIO_ESPIPE
:
12673 case FILEIO_ENOSYS
:
12675 case FILEIO_ENAMETOOLONG
:
12676 return ENAMETOOLONG
;
12682 remote_hostio_error (int errnum
)
12684 int host_error
= remote_fileio_errno_to_host (errnum
);
12686 if (host_error
== -1)
12687 error (_("Unknown remote I/O error %d"), errnum
);
12689 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12692 /* A RAII wrapper around a remote file descriptor. */
12694 class scoped_remote_fd
12697 scoped_remote_fd (remote_target
*remote
, int fd
)
12698 : m_remote (remote
), m_fd (fd
)
12702 ~scoped_remote_fd ()
12709 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12713 /* Swallow exception before it escapes the dtor. If
12714 something goes wrong, likely the connection is gone,
12715 and there's nothing else that can be done. */
12720 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12722 /* Release ownership of the file descriptor, and return it. */
12723 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12730 /* Return the owned file descriptor. */
12731 int get () const noexcept
12737 /* The remote target. */
12738 remote_target
*m_remote
;
12740 /* The owned remote I/O file descriptor. */
12745 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12747 remote_target
*remote
= get_current_remote_target ();
12749 if (remote
== nullptr)
12750 error (_("command can only be used with remote target"));
12752 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12756 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12759 int retcode
, remote_errno
, bytes
, io_size
;
12760 int bytes_in_buffer
;
12764 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12766 perror_with_name (local_file
);
12768 scoped_remote_fd fd
12769 (this, remote_hostio_open (NULL
,
12770 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12772 0700, 0, &remote_errno
));
12773 if (fd
.get () == -1)
12774 remote_hostio_error (remote_errno
);
12776 /* Send up to this many bytes at once. They won't all fit in the
12777 remote packet limit, so we'll transfer slightly fewer. */
12778 io_size
= get_remote_packet_size ();
12779 gdb::byte_vector
buffer (io_size
);
12781 bytes_in_buffer
= 0;
12784 while (bytes_in_buffer
|| !saw_eof
)
12788 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12789 io_size
- bytes_in_buffer
,
12793 if (ferror (file
.get ()))
12794 error (_("Error reading %s."), local_file
);
12797 /* EOF. Unless there is something still in the
12798 buffer from the last iteration, we are done. */
12800 if (bytes_in_buffer
== 0)
12808 bytes
+= bytes_in_buffer
;
12809 bytes_in_buffer
= 0;
12811 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12812 offset
, &remote_errno
);
12815 remote_hostio_error (remote_errno
);
12816 else if (retcode
== 0)
12817 error (_("Remote write of %d bytes returned 0!"), bytes
);
12818 else if (retcode
< bytes
)
12820 /* Short write. Save the rest of the read data for the next
12822 bytes_in_buffer
= bytes
- retcode
;
12823 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12829 if (remote_hostio_close (fd
.release (), &remote_errno
))
12830 remote_hostio_error (remote_errno
);
12833 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12837 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12839 remote_target
*remote
= get_current_remote_target ();
12841 if (remote
== nullptr)
12842 error (_("command can only be used with remote target"));
12844 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12848 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12851 int remote_errno
, bytes
, io_size
;
12854 scoped_remote_fd fd
12855 (this, remote_hostio_open (NULL
,
12856 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12858 if (fd
.get () == -1)
12859 remote_hostio_error (remote_errno
);
12861 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12863 perror_with_name (local_file
);
12865 /* Send up to this many bytes at once. They won't all fit in the
12866 remote packet limit, so we'll transfer slightly fewer. */
12867 io_size
= get_remote_packet_size ();
12868 gdb::byte_vector
buffer (io_size
);
12873 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12876 /* Success, but no bytes, means end-of-file. */
12879 remote_hostio_error (remote_errno
);
12883 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12885 perror_with_name (local_file
);
12888 if (remote_hostio_close (fd
.release (), &remote_errno
))
12889 remote_hostio_error (remote_errno
);
12892 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12896 remote_file_delete (const char *remote_file
, int from_tty
)
12898 remote_target
*remote
= get_current_remote_target ();
12900 if (remote
== nullptr)
12901 error (_("command can only be used with remote target"));
12903 remote
->remote_file_delete (remote_file
, from_tty
);
12907 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12909 int retcode
, remote_errno
;
12911 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12913 remote_hostio_error (remote_errno
);
12916 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12920 remote_put_command (const char *args
, int from_tty
)
12923 error_no_arg (_("file to put"));
12925 gdb_argv
argv (args
);
12926 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12927 error (_("Invalid parameters to remote put"));
12929 remote_file_put (argv
[0], argv
[1], from_tty
);
12933 remote_get_command (const char *args
, int from_tty
)
12936 error_no_arg (_("file to get"));
12938 gdb_argv
argv (args
);
12939 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12940 error (_("Invalid parameters to remote get"));
12942 remote_file_get (argv
[0], argv
[1], from_tty
);
12946 remote_delete_command (const char *args
, int from_tty
)
12949 error_no_arg (_("file to delete"));
12951 gdb_argv
argv (args
);
12952 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12953 error (_("Invalid parameters to remote delete"));
12955 remote_file_delete (argv
[0], from_tty
);
12959 remote_target::can_execute_reverse ()
12961 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12962 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12969 remote_target::supports_non_stop ()
12975 remote_target::supports_disable_randomization ()
12977 /* Only supported in extended mode. */
12982 remote_target::supports_multi_process ()
12984 struct remote_state
*rs
= get_remote_state ();
12986 return remote_multi_process_p (rs
);
12990 remote_supports_cond_tracepoints ()
12992 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12996 remote_target::supports_evaluation_of_breakpoint_conditions ()
12998 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
13002 remote_supports_fast_tracepoints ()
13004 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
13008 remote_supports_static_tracepoints ()
13010 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
13014 remote_supports_install_in_trace ()
13016 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
13020 remote_target::supports_enable_disable_tracepoint ()
13022 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
13027 remote_target::supports_string_tracing ()
13029 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
13033 remote_target::can_run_breakpoint_commands ()
13035 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
13039 remote_target::trace_init ()
13041 struct remote_state
*rs
= get_remote_state ();
13044 remote_get_noisy_reply ();
13045 if (strcmp (rs
->buf
.data (), "OK") != 0)
13046 error (_("Target does not support this command."));
13049 /* Recursive routine to walk through command list including loops, and
13050 download packets for each command. */
13053 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
13054 struct command_line
*cmds
)
13056 struct remote_state
*rs
= get_remote_state ();
13057 struct command_line
*cmd
;
13059 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
13061 QUIT
; /* Allow user to bail out with ^C. */
13062 strcpy (rs
->buf
.data (), "QTDPsrc:");
13063 encode_source_string (num
, addr
, "cmd", cmd
->line
,
13064 rs
->buf
.data () + strlen (rs
->buf
.data ()),
13065 rs
->buf
.size () - strlen (rs
->buf
.data ()));
13067 remote_get_noisy_reply ();
13068 if (strcmp (rs
->buf
.data (), "OK"))
13069 warning (_("Target does not support source download."));
13071 if (cmd
->control_type
== while_control
13072 || cmd
->control_type
== while_stepping_control
)
13074 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
13076 QUIT
; /* Allow user to bail out with ^C. */
13077 strcpy (rs
->buf
.data (), "QTDPsrc:");
13078 encode_source_string (num
, addr
, "cmd", "end",
13079 rs
->buf
.data () + strlen (rs
->buf
.data ()),
13080 rs
->buf
.size () - strlen (rs
->buf
.data ()));
13082 remote_get_noisy_reply ();
13083 if (strcmp (rs
->buf
.data (), "OK"))
13084 warning (_("Target does not support source download."));
13090 remote_target::download_tracepoint (struct bp_location
*loc
)
13094 std::vector
<std::string
> tdp_actions
;
13095 std::vector
<std::string
> stepping_actions
;
13097 struct breakpoint
*b
= loc
->owner
;
13098 struct tracepoint
*t
= (struct tracepoint
*) b
;
13099 struct remote_state
*rs
= get_remote_state ();
13101 const char *err_msg
= _("Tracepoint packet too large for target.");
13104 /* We use a buffer other than rs->buf because we'll build strings
13105 across multiple statements, and other statements in between could
13107 gdb::char_vector
buf (get_remote_packet_size ());
13109 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
13111 tpaddr
= loc
->address
;
13112 strcpy (addrbuf
, phex (tpaddr
, sizeof (CORE_ADDR
)));
13113 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
13114 b
->number
, addrbuf
, /* address */
13115 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
13116 t
->step_count
, t
->pass_count
);
13118 if (ret
< 0 || ret
>= buf
.size ())
13119 error ("%s", err_msg
);
13121 /* Fast tracepoints are mostly handled by the target, but we can
13122 tell the target how big of an instruction block should be moved
13124 if (b
->type
== bp_fast_tracepoint
)
13126 /* Only test for support at download time; we may not know
13127 target capabilities at definition time. */
13128 if (remote_supports_fast_tracepoints ())
13130 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
13133 size_left
= buf
.size () - strlen (buf
.data ());
13134 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13136 gdb_insn_length (loc
->gdbarch
, tpaddr
));
13138 if (ret
< 0 || ret
>= size_left
)
13139 error ("%s", err_msg
);
13142 /* If it passed validation at definition but fails now,
13143 something is very wrong. */
13144 internal_error (__FILE__
, __LINE__
,
13145 _("Fast tracepoint not "
13146 "valid during download"));
13149 /* Fast tracepoints are functionally identical to regular
13150 tracepoints, so don't take lack of support as a reason to
13151 give up on the trace run. */
13152 warning (_("Target does not support fast tracepoints, "
13153 "downloading %d as regular tracepoint"), b
->number
);
13155 else if (b
->type
== bp_static_tracepoint
)
13157 /* Only test for support at download time; we may not know
13158 target capabilities at definition time. */
13159 if (remote_supports_static_tracepoints ())
13161 struct static_tracepoint_marker marker
;
13163 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
13165 size_left
= buf
.size () - strlen (buf
.data ());
13166 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13169 if (ret
< 0 || ret
>= size_left
)
13170 error ("%s", err_msg
);
13173 error (_("Static tracepoint not valid during download"));
13176 /* Fast tracepoints are functionally identical to regular
13177 tracepoints, so don't take lack of support as a reason
13178 to give up on the trace run. */
13179 error (_("Target does not support static tracepoints"));
13181 /* If the tracepoint has a conditional, make it into an agent
13182 expression and append to the definition. */
13185 /* Only test support at download time, we may not know target
13186 capabilities at definition time. */
13187 if (remote_supports_cond_tracepoints ())
13189 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
13192 size_left
= buf
.size () - strlen (buf
.data ());
13194 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13195 size_left
, ":X%x,", aexpr
->len
);
13197 if (ret
< 0 || ret
>= size_left
)
13198 error ("%s", err_msg
);
13200 size_left
= buf
.size () - strlen (buf
.data ());
13202 /* Two bytes to encode each aexpr byte, plus the terminating
13204 if (aexpr
->len
* 2 + 1 > size_left
)
13205 error ("%s", err_msg
);
13207 pkt
= buf
.data () + strlen (buf
.data ());
13209 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
13210 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
13214 warning (_("Target does not support conditional tracepoints, "
13215 "ignoring tp %d cond"), b
->number
);
13218 if (b
->commands
|| *default_collect
)
13220 size_left
= buf
.size () - strlen (buf
.data ());
13222 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13225 if (ret
< 0 || ret
>= size_left
)
13226 error ("%s", err_msg
);
13229 putpkt (buf
.data ());
13230 remote_get_noisy_reply ();
13231 if (strcmp (rs
->buf
.data (), "OK"))
13232 error (_("Target does not support tracepoints."));
13234 /* do_single_steps (t); */
13235 for (auto action_it
= tdp_actions
.begin ();
13236 action_it
!= tdp_actions
.end (); action_it
++)
13238 QUIT
; /* Allow user to bail out with ^C. */
13240 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
13241 || !stepping_actions
.empty ());
13243 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
13244 b
->number
, addrbuf
, /* address */
13245 action_it
->c_str (),
13246 has_more
? '-' : 0);
13248 if (ret
< 0 || ret
>= buf
.size ())
13249 error ("%s", err_msg
);
13251 putpkt (buf
.data ());
13252 remote_get_noisy_reply ();
13253 if (strcmp (rs
->buf
.data (), "OK"))
13254 error (_("Error on target while setting tracepoints."));
13257 for (auto action_it
= stepping_actions
.begin ();
13258 action_it
!= stepping_actions
.end (); action_it
++)
13260 QUIT
; /* Allow user to bail out with ^C. */
13262 bool is_first
= action_it
== stepping_actions
.begin ();
13263 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
13265 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
13266 b
->number
, addrbuf
, /* address */
13267 is_first
? "S" : "",
13268 action_it
->c_str (),
13269 has_more
? "-" : "");
13271 if (ret
< 0 || ret
>= buf
.size ())
13272 error ("%s", err_msg
);
13274 putpkt (buf
.data ());
13275 remote_get_noisy_reply ();
13276 if (strcmp (rs
->buf
.data (), "OK"))
13277 error (_("Error on target while setting tracepoints."));
13280 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
13282 if (b
->location
!= NULL
)
13284 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13286 if (ret
< 0 || ret
>= buf
.size ())
13287 error ("%s", err_msg
);
13289 encode_source_string (b
->number
, loc
->address
, "at",
13290 event_location_to_string (b
->location
.get ()),
13291 buf
.data () + strlen (buf
.data ()),
13292 buf
.size () - strlen (buf
.data ()));
13293 putpkt (buf
.data ());
13294 remote_get_noisy_reply ();
13295 if (strcmp (rs
->buf
.data (), "OK"))
13296 warning (_("Target does not support source download."));
13298 if (b
->cond_string
)
13300 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13302 if (ret
< 0 || ret
>= buf
.size ())
13303 error ("%s", err_msg
);
13305 encode_source_string (b
->number
, loc
->address
,
13306 "cond", b
->cond_string
,
13307 buf
.data () + strlen (buf
.data ()),
13308 buf
.size () - strlen (buf
.data ()));
13309 putpkt (buf
.data ());
13310 remote_get_noisy_reply ();
13311 if (strcmp (rs
->buf
.data (), "OK"))
13312 warning (_("Target does not support source download."));
13314 remote_download_command_source (b
->number
, loc
->address
,
13315 breakpoint_commands (b
));
13320 remote_target::can_download_tracepoint ()
13322 struct remote_state
*rs
= get_remote_state ();
13323 struct trace_status
*ts
;
13326 /* Don't try to install tracepoints until we've relocated our
13327 symbols, and fetched and merged the target's tracepoint list with
13329 if (rs
->starting_up
)
13332 ts
= current_trace_status ();
13333 status
= get_trace_status (ts
);
13335 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13338 /* If we are in a tracing experiment, but remote stub doesn't support
13339 installing tracepoint in trace, we have to return. */
13340 if (!remote_supports_install_in_trace ())
13348 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13350 struct remote_state
*rs
= get_remote_state ();
13353 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13354 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13356 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13357 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13358 >= get_remote_packet_size ())
13359 error (_("Trace state variable name too long for tsv definition packet"));
13360 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13363 remote_get_noisy_reply ();
13364 if (rs
->buf
[0] == '\0')
13365 error (_("Target does not support this command."));
13366 if (strcmp (rs
->buf
.data (), "OK") != 0)
13367 error (_("Error on target while downloading trace state variable."));
13371 remote_target::enable_tracepoint (struct bp_location
*location
)
13373 struct remote_state
*rs
= get_remote_state ();
13375 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13376 location
->owner
->number
,
13377 phex (location
->address
, sizeof (CORE_ADDR
)));
13379 remote_get_noisy_reply ();
13380 if (rs
->buf
[0] == '\0')
13381 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13382 if (strcmp (rs
->buf
.data (), "OK") != 0)
13383 error (_("Error on target while enabling tracepoint."));
13387 remote_target::disable_tracepoint (struct bp_location
*location
)
13389 struct remote_state
*rs
= get_remote_state ();
13391 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13392 location
->owner
->number
,
13393 phex (location
->address
, sizeof (CORE_ADDR
)));
13395 remote_get_noisy_reply ();
13396 if (rs
->buf
[0] == '\0')
13397 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13398 if (strcmp (rs
->buf
.data (), "OK") != 0)
13399 error (_("Error on target while disabling tracepoint."));
13403 remote_target::trace_set_readonly_regions ()
13406 bfd_size_type size
;
13411 if (!current_program_space
->exec_bfd ())
13412 return; /* No information to give. */
13414 struct remote_state
*rs
= get_remote_state ();
13416 strcpy (rs
->buf
.data (), "QTro");
13417 offset
= strlen (rs
->buf
.data ());
13418 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
13420 char tmp1
[40], tmp2
[40];
13423 if ((s
->flags
& SEC_LOAD
) == 0 ||
13424 /* (s->flags & SEC_CODE) == 0 || */
13425 (s
->flags
& SEC_READONLY
) == 0)
13429 vma
= bfd_section_vma (s
);
13430 size
= bfd_section_size (s
);
13431 sprintf_vma (tmp1
, vma
);
13432 sprintf_vma (tmp2
, vma
+ size
);
13433 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13434 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13436 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13438 Too many sections for read-only sections definition packet."));
13441 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13443 offset
+= sec_length
;
13448 getpkt (&rs
->buf
, 0);
13453 remote_target::trace_start ()
13455 struct remote_state
*rs
= get_remote_state ();
13457 putpkt ("QTStart");
13458 remote_get_noisy_reply ();
13459 if (rs
->buf
[0] == '\0')
13460 error (_("Target does not support this command."));
13461 if (strcmp (rs
->buf
.data (), "OK") != 0)
13462 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13466 remote_target::get_trace_status (struct trace_status
*ts
)
13468 /* Initialize it just to avoid a GCC false warning. */
13470 enum packet_result result
;
13471 struct remote_state
*rs
= get_remote_state ();
13473 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13476 /* FIXME we need to get register block size some other way. */
13477 trace_regblock_size
13478 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13480 putpkt ("qTStatus");
13484 p
= remote_get_noisy_reply ();
13486 catch (const gdb_exception_error
&ex
)
13488 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13490 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13496 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13498 /* If the remote target doesn't do tracing, flag it. */
13499 if (result
== PACKET_UNKNOWN
)
13502 /* We're working with a live target. */
13503 ts
->filename
= NULL
;
13506 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13508 /* Function 'parse_trace_status' sets default value of each field of
13509 'ts' at first, so we don't have to do it here. */
13510 parse_trace_status (p
, ts
);
13512 return ts
->running
;
13516 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13517 struct uploaded_tp
*utp
)
13519 struct remote_state
*rs
= get_remote_state ();
13521 struct bp_location
*loc
;
13522 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13523 size_t size
= get_remote_packet_size ();
13528 tp
->traceframe_usage
= 0;
13529 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
13531 /* If the tracepoint was never downloaded, don't go asking for
13533 if (tp
->number_on_target
== 0)
13535 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13536 phex_nz (loc
->address
, 0));
13538 reply
= remote_get_noisy_reply ();
13539 if (reply
&& *reply
)
13542 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13548 utp
->hit_count
= 0;
13549 utp
->traceframe_usage
= 0;
13550 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13551 phex_nz (utp
->addr
, 0));
13553 reply
= remote_get_noisy_reply ();
13554 if (reply
&& *reply
)
13557 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13563 remote_target::trace_stop ()
13565 struct remote_state
*rs
= get_remote_state ();
13568 remote_get_noisy_reply ();
13569 if (rs
->buf
[0] == '\0')
13570 error (_("Target does not support this command."));
13571 if (strcmp (rs
->buf
.data (), "OK") != 0)
13572 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13576 remote_target::trace_find (enum trace_find_type type
, int num
,
13577 CORE_ADDR addr1
, CORE_ADDR addr2
,
13580 struct remote_state
*rs
= get_remote_state ();
13581 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13583 int target_frameno
= -1, target_tracept
= -1;
13585 /* Lookups other than by absolute frame number depend on the current
13586 trace selected, so make sure it is correct on the remote end
13588 if (type
!= tfind_number
)
13589 set_remote_traceframe ();
13591 p
= rs
->buf
.data ();
13592 strcpy (p
, "QTFrame:");
13593 p
= strchr (p
, '\0');
13597 xsnprintf (p
, endbuf
- p
, "%x", num
);
13600 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13603 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13606 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13607 phex_nz (addr2
, 0));
13609 case tfind_outside
:
13610 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13611 phex_nz (addr2
, 0));
13614 error (_("Unknown trace find type %d"), type
);
13618 reply
= remote_get_noisy_reply ();
13619 if (*reply
== '\0')
13620 error (_("Target does not support this command."));
13622 while (reply
&& *reply
)
13627 target_frameno
= (int) strtol (p
, &reply
, 16);
13629 error (_("Unable to parse trace frame number"));
13630 /* Don't update our remote traceframe number cache on failure
13631 to select a remote traceframe. */
13632 if (target_frameno
== -1)
13637 target_tracept
= (int) strtol (p
, &reply
, 16);
13639 error (_("Unable to parse tracepoint number"));
13641 case 'O': /* "OK"? */
13642 if (reply
[1] == 'K' && reply
[2] == '\0')
13645 error (_("Bogus reply from target: %s"), reply
);
13648 error (_("Bogus reply from target: %s"), reply
);
13651 *tpp
= target_tracept
;
13653 rs
->remote_traceframe_number
= target_frameno
;
13654 return target_frameno
;
13658 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13660 struct remote_state
*rs
= get_remote_state ();
13664 set_remote_traceframe ();
13666 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13668 reply
= remote_get_noisy_reply ();
13669 if (reply
&& *reply
)
13673 unpack_varlen_hex (reply
+ 1, &uval
);
13674 *val
= (LONGEST
) uval
;
13682 remote_target::save_trace_data (const char *filename
)
13684 struct remote_state
*rs
= get_remote_state ();
13687 p
= rs
->buf
.data ();
13688 strcpy (p
, "QTSave:");
13690 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13691 >= get_remote_packet_size ())
13692 error (_("Remote file name too long for trace save packet"));
13693 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13696 reply
= remote_get_noisy_reply ();
13697 if (*reply
== '\0')
13698 error (_("Target does not support this command."));
13699 if (strcmp (reply
, "OK") != 0)
13700 error (_("Bogus reply from target: %s"), reply
);
13704 /* This is basically a memory transfer, but needs to be its own packet
13705 because we don't know how the target actually organizes its trace
13706 memory, plus we want to be able to ask for as much as possible, but
13707 not be unhappy if we don't get as much as we ask for. */
13710 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13712 struct remote_state
*rs
= get_remote_state ();
13717 p
= rs
->buf
.data ();
13718 strcpy (p
, "qTBuffer:");
13720 p
+= hexnumstr (p
, offset
);
13722 p
+= hexnumstr (p
, len
);
13726 reply
= remote_get_noisy_reply ();
13727 if (reply
&& *reply
)
13729 /* 'l' by itself means we're at the end of the buffer and
13730 there is nothing more to get. */
13734 /* Convert the reply into binary. Limit the number of bytes to
13735 convert according to our passed-in buffer size, rather than
13736 what was returned in the packet; if the target is
13737 unexpectedly generous and gives us a bigger reply than we
13738 asked for, we don't want to crash. */
13739 rslt
= hex2bin (reply
, buf
, len
);
13743 /* Something went wrong, flag as an error. */
13748 remote_target::set_disconnected_tracing (int val
)
13750 struct remote_state
*rs
= get_remote_state ();
13752 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13756 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13757 "QTDisconnected:%x", val
);
13759 reply
= remote_get_noisy_reply ();
13760 if (*reply
== '\0')
13761 error (_("Target does not support this command."));
13762 if (strcmp (reply
, "OK") != 0)
13763 error (_("Bogus reply from target: %s"), reply
);
13766 warning (_("Target does not support disconnected tracing."));
13770 remote_target::core_of_thread (ptid_t ptid
)
13772 thread_info
*info
= find_thread_ptid (this, ptid
);
13774 if (info
!= NULL
&& info
->priv
!= NULL
)
13775 return get_remote_thread_info (info
)->core
;
13781 remote_target::set_circular_trace_buffer (int val
)
13783 struct remote_state
*rs
= get_remote_state ();
13786 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13787 "QTBuffer:circular:%x", val
);
13789 reply
= remote_get_noisy_reply ();
13790 if (*reply
== '\0')
13791 error (_("Target does not support this command."));
13792 if (strcmp (reply
, "OK") != 0)
13793 error (_("Bogus reply from target: %s"), reply
);
13797 remote_target::traceframe_info ()
13799 gdb::optional
<gdb::char_vector
> text
13800 = target_read_stralloc (current_inferior ()->top_target (),
13801 TARGET_OBJECT_TRACEFRAME_INFO
,
13804 return parse_traceframe_info (text
->data ());
13809 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13810 instruction on which a fast tracepoint may be placed. Returns -1
13811 if the packet is not supported, and 0 if the minimum instruction
13812 length is unknown. */
13815 remote_target::get_min_fast_tracepoint_insn_len ()
13817 struct remote_state
*rs
= get_remote_state ();
13820 /* If we're not debugging a process yet, the IPA can't be
13822 if (!target_has_execution ())
13825 /* Make sure the remote is pointing at the right process. */
13826 set_general_process ();
13828 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13830 reply
= remote_get_noisy_reply ();
13831 if (*reply
== '\0')
13835 ULONGEST min_insn_len
;
13837 unpack_varlen_hex (reply
, &min_insn_len
);
13839 return (int) min_insn_len
;
13844 remote_target::set_trace_buffer_size (LONGEST val
)
13846 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13848 struct remote_state
*rs
= get_remote_state ();
13849 char *buf
= rs
->buf
.data ();
13850 char *endbuf
= buf
+ get_remote_packet_size ();
13851 enum packet_result result
;
13853 gdb_assert (val
>= 0 || val
== -1);
13854 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13855 /* Send -1 as literal "-1" to avoid host size dependency. */
13859 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13862 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13865 remote_get_noisy_reply ();
13866 result
= packet_ok (rs
->buf
,
13867 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13869 if (result
!= PACKET_OK
)
13870 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13875 remote_target::set_trace_notes (const char *user
, const char *notes
,
13876 const char *stop_notes
)
13878 struct remote_state
*rs
= get_remote_state ();
13880 char *buf
= rs
->buf
.data ();
13881 char *endbuf
= buf
+ get_remote_packet_size ();
13884 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13887 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13888 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13894 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13895 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13901 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13902 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13906 /* Ensure the buffer is terminated. */
13910 reply
= remote_get_noisy_reply ();
13911 if (*reply
== '\0')
13914 if (strcmp (reply
, "OK") != 0)
13915 error (_("Bogus reply from target: %s"), reply
);
13921 remote_target::use_agent (bool use
)
13923 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13925 struct remote_state
*rs
= get_remote_state ();
13927 /* If the stub supports QAgent. */
13928 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13930 getpkt (&rs
->buf
, 0);
13932 if (strcmp (rs
->buf
.data (), "OK") == 0)
13943 remote_target::can_use_agent ()
13945 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13948 struct btrace_target_info
13950 /* The ptid of the traced thread. */
13953 /* The obtained branch trace configuration. */
13954 struct btrace_config conf
;
13957 /* Reset our idea of our target's btrace configuration. */
13960 remote_btrace_reset (remote_state
*rs
)
13962 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13965 /* Synchronize the configuration with the target. */
13968 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13970 struct packet_config
*packet
;
13971 struct remote_state
*rs
;
13972 char *buf
, *pos
, *endbuf
;
13974 rs
= get_remote_state ();
13975 buf
= rs
->buf
.data ();
13976 endbuf
= buf
+ get_remote_packet_size ();
13978 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13979 if (packet_config_support (packet
) == PACKET_ENABLE
13980 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13983 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13987 getpkt (&rs
->buf
, 0);
13989 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13991 if (buf
[0] == 'E' && buf
[1] == '.')
13992 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13994 error (_("Failed to configure the BTS buffer size."));
13997 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
14000 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
14001 if (packet_config_support (packet
) == PACKET_ENABLE
14002 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
14005 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
14009 getpkt (&rs
->buf
, 0);
14011 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
14013 if (buf
[0] == 'E' && buf
[1] == '.')
14014 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
14016 error (_("Failed to configure the trace buffer size."));
14019 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
14023 /* Read the current thread's btrace configuration from the target and
14024 store it into CONF. */
14027 btrace_read_config (struct btrace_config
*conf
)
14029 gdb::optional
<gdb::char_vector
> xml
14030 = target_read_stralloc (current_inferior ()->top_target (),
14031 TARGET_OBJECT_BTRACE_CONF
, "");
14033 parse_xml_btrace_conf (conf
, xml
->data ());
14036 /* Maybe reopen target btrace. */
14039 remote_target::remote_btrace_maybe_reopen ()
14041 struct remote_state
*rs
= get_remote_state ();
14042 int btrace_target_pushed
= 0;
14043 #if !defined (HAVE_LIBIPT)
14047 /* Don't bother walking the entirety of the remote thread list when
14048 we know the feature isn't supported by the remote. */
14049 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
14052 scoped_restore_current_thread restore_thread
;
14054 for (thread_info
*tp
: all_non_exited_threads (this))
14056 set_general_thread (tp
->ptid
);
14058 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
14059 btrace_read_config (&rs
->btrace_config
);
14061 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
14064 #if !defined (HAVE_LIBIPT)
14065 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
14070 warning (_("Target is recording using Intel Processor Trace "
14071 "but support was disabled at compile time."));
14076 #endif /* !defined (HAVE_LIBIPT) */
14078 /* Push target, once, but before anything else happens. This way our
14079 changes to the threads will be cleaned up by unpushing the target
14080 in case btrace_read_config () throws. */
14081 if (!btrace_target_pushed
)
14083 btrace_target_pushed
= 1;
14084 record_btrace_push_target ();
14085 printf_filtered (_("Target is recording using %s.\n"),
14086 btrace_format_string (rs
->btrace_config
.format
));
14089 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
14090 tp
->btrace
.target
->ptid
= tp
->ptid
;
14091 tp
->btrace
.target
->conf
= rs
->btrace_config
;
14095 /* Enable branch tracing. */
14097 struct btrace_target_info
*
14098 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
14100 struct btrace_target_info
*tinfo
= NULL
;
14101 struct packet_config
*packet
= NULL
;
14102 struct remote_state
*rs
= get_remote_state ();
14103 char *buf
= rs
->buf
.data ();
14104 char *endbuf
= buf
+ get_remote_packet_size ();
14106 switch (conf
->format
)
14108 case BTRACE_FORMAT_BTS
:
14109 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
14112 case BTRACE_FORMAT_PT
:
14113 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
14117 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
14118 error (_("Target does not support branch tracing."));
14120 btrace_sync_conf (conf
);
14122 set_general_thread (ptid
);
14124 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14126 getpkt (&rs
->buf
, 0);
14128 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14130 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14131 error (_("Could not enable branch tracing for %s: %s"),
14132 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
14134 error (_("Could not enable branch tracing for %s."),
14135 target_pid_to_str (ptid
).c_str ());
14138 tinfo
= XCNEW (struct btrace_target_info
);
14139 tinfo
->ptid
= ptid
;
14141 /* If we fail to read the configuration, we lose some information, but the
14142 tracing itself is not impacted. */
14145 btrace_read_config (&tinfo
->conf
);
14147 catch (const gdb_exception_error
&err
)
14149 if (err
.message
!= NULL
)
14150 warning ("%s", err
.what ());
14156 /* Disable branch tracing. */
14159 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
14161 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
14162 struct remote_state
*rs
= get_remote_state ();
14163 char *buf
= rs
->buf
.data ();
14164 char *endbuf
= buf
+ get_remote_packet_size ();
14166 if (packet_config_support (packet
) != PACKET_ENABLE
)
14167 error (_("Target does not support branch tracing."));
14169 set_general_thread (tinfo
->ptid
);
14171 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14173 getpkt (&rs
->buf
, 0);
14175 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14177 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14178 error (_("Could not disable branch tracing for %s: %s"),
14179 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
14181 error (_("Could not disable branch tracing for %s."),
14182 target_pid_to_str (tinfo
->ptid
).c_str ());
14188 /* Teardown branch tracing. */
14191 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
14193 /* We must not talk to the target during teardown. */
14197 /* Read the branch trace. */
14200 remote_target::read_btrace (struct btrace_data
*btrace
,
14201 struct btrace_target_info
*tinfo
,
14202 enum btrace_read_type type
)
14204 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
14207 if (packet_config_support (packet
) != PACKET_ENABLE
)
14208 error (_("Target does not support branch tracing."));
14210 #if !defined(HAVE_LIBEXPAT)
14211 error (_("Cannot process branch tracing result. XML parsing not supported."));
14216 case BTRACE_READ_ALL
:
14219 case BTRACE_READ_NEW
:
14222 case BTRACE_READ_DELTA
:
14226 internal_error (__FILE__
, __LINE__
,
14227 _("Bad branch tracing read type: %u."),
14228 (unsigned int) type
);
14231 gdb::optional
<gdb::char_vector
> xml
14232 = target_read_stralloc (current_inferior ()->top_target (),
14233 TARGET_OBJECT_BTRACE
, annex
);
14235 return BTRACE_ERR_UNKNOWN
;
14237 parse_xml_btrace (btrace
, xml
->data ());
14239 return BTRACE_ERR_NONE
;
14242 const struct btrace_config
*
14243 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
14245 return &tinfo
->conf
;
14249 remote_target::augmented_libraries_svr4_read ()
14251 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
14255 /* Implementation of to_load. */
14258 remote_target::load (const char *name
, int from_tty
)
14260 generic_load (name
, from_tty
);
14263 /* Accepts an integer PID; returns a string representing a file that
14264 can be opened on the remote side to get the symbols for the child
14265 process. Returns NULL if the operation is not supported. */
14268 remote_target::pid_to_exec_file (int pid
)
14270 static gdb::optional
<gdb::char_vector
> filename
;
14271 char *annex
= NULL
;
14273 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
14276 inferior
*inf
= find_inferior_pid (this, pid
);
14278 internal_error (__FILE__
, __LINE__
,
14279 _("not currently attached to process %d"), pid
);
14281 if (!inf
->fake_pid_p
)
14283 const int annex_size
= 9;
14285 annex
= (char *) alloca (annex_size
);
14286 xsnprintf (annex
, annex_size
, "%x", pid
);
14289 filename
= target_read_stralloc (current_inferior ()->top_target (),
14290 TARGET_OBJECT_EXEC_FILE
, annex
);
14292 return filename
? filename
->data () : nullptr;
14295 /* Implement the to_can_do_single_step target_ops method. */
14298 remote_target::can_do_single_step ()
14300 /* We can only tell whether target supports single step or not by
14301 supported s and S vCont actions if the stub supports vContSupported
14302 feature. If the stub doesn't support vContSupported feature,
14303 we have conservatively to think target doesn't supports single
14305 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
14307 struct remote_state
*rs
= get_remote_state ();
14309 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14310 remote_vcont_probe ();
14312 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14318 /* Implementation of the to_execution_direction method for the remote
14321 enum exec_direction_kind
14322 remote_target::execution_direction ()
14324 struct remote_state
*rs
= get_remote_state ();
14326 return rs
->last_resume_exec_dir
;
14329 /* Return pointer to the thread_info struct which corresponds to
14330 THREAD_HANDLE (having length HANDLE_LEN). */
14333 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14337 for (thread_info
*tp
: all_non_exited_threads (this))
14339 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14341 if (tp
->inf
== inf
&& priv
!= NULL
)
14343 if (handle_len
!= priv
->thread_handle
.size ())
14344 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14345 handle_len
, priv
->thread_handle
.size ());
14346 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14356 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14358 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14359 return priv
->thread_handle
;
14363 remote_target::can_async_p ()
14365 struct remote_state
*rs
= get_remote_state ();
14367 /* We don't go async if the user has explicitly prevented it with the
14368 "maint set target-async" command. */
14369 if (!target_async_permitted
)
14372 /* We're async whenever the serial device is. */
14373 return serial_can_async_p (rs
->remote_desc
);
14377 remote_target::is_async_p ()
14379 struct remote_state
*rs
= get_remote_state ();
14381 if (!target_async_permitted
)
14382 /* We only enable async when the user specifically asks for it. */
14385 /* We're async whenever the serial device is. */
14386 return serial_is_async_p (rs
->remote_desc
);
14389 /* Pass the SERIAL event on and up to the client. One day this code
14390 will be able to delay notifying the client of an event until the
14391 point where an entire packet has been received. */
14393 static serial_event_ftype remote_async_serial_handler
;
14396 remote_async_serial_handler (struct serial
*scb
, void *context
)
14398 /* Don't propogate error information up to the client. Instead let
14399 the client find out about the error by querying the target. */
14400 inferior_event_handler (INF_REG_EVENT
);
14404 remote_async_inferior_event_handler (gdb_client_data data
)
14406 inferior_event_handler (INF_REG_EVENT
);
14410 remote_target::async_wait_fd ()
14412 struct remote_state
*rs
= get_remote_state ();
14413 return rs
->remote_desc
->fd
;
14417 remote_target::async (int enable
)
14419 struct remote_state
*rs
= get_remote_state ();
14423 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14425 /* If there are pending events in the stop reply queue tell the
14426 event loop to process them. */
14427 if (!rs
->stop_reply_queue
.empty ())
14428 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14429 /* For simplicity, below we clear the pending events token
14430 without remembering whether it is marked, so here we always
14431 mark it. If there's actually no pending notification to
14432 process, this ends up being a no-op (other than a spurious
14433 event-loop wakeup). */
14434 if (target_is_non_stop_p ())
14435 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14439 serial_async (rs
->remote_desc
, NULL
, NULL
);
14440 /* If the core is disabling async, it doesn't want to be
14441 disturbed with target events. Clear all async event sources
14443 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14444 if (target_is_non_stop_p ())
14445 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14449 /* Implementation of the to_thread_events method. */
14452 remote_target::thread_events (int enable
)
14454 struct remote_state
*rs
= get_remote_state ();
14455 size_t size
= get_remote_packet_size ();
14457 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14460 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14462 getpkt (&rs
->buf
, 0);
14464 switch (packet_ok (rs
->buf
,
14465 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14468 if (strcmp (rs
->buf
.data (), "OK") != 0)
14469 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14472 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14474 case PACKET_UNKNOWN
:
14480 show_remote_cmd (const char *args
, int from_tty
)
14482 /* We can't just use cmd_show_list here, because we want to skip
14483 the redundant "show remote Z-packet" and the legacy aliases. */
14484 struct cmd_list_element
*list
= remote_show_cmdlist
;
14485 struct ui_out
*uiout
= current_uiout
;
14487 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14488 for (; list
!= NULL
; list
= list
->next
)
14489 if (strcmp (list
->name
, "Z-packet") == 0)
14491 else if (list
->type
== not_set_cmd
)
14492 /* Alias commands are exactly like the original, except they
14493 don't have the normal type. */
14497 ui_out_emit_tuple
option_emitter (uiout
, "option");
14499 uiout
->field_string ("name", list
->name
);
14500 uiout
->text (": ");
14501 if (list
->type
== show_cmd
)
14502 do_show_command (NULL
, from_tty
, list
);
14504 cmd_func (list
, NULL
, from_tty
);
14509 /* Function to be called whenever a new objfile (shlib) is detected. */
14511 remote_new_objfile (struct objfile
*objfile
)
14513 remote_target
*remote
= get_current_remote_target ();
14515 if (remote
!= NULL
) /* Have a remote connection. */
14516 remote
->remote_check_symbols ();
14519 /* Pull all the tracepoints defined on the target and create local
14520 data structures representing them. We don't want to create real
14521 tracepoints yet, we don't want to mess up the user's existing
14525 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14527 struct remote_state
*rs
= get_remote_state ();
14530 /* Ask for a first packet of tracepoint definition. */
14532 getpkt (&rs
->buf
, 0);
14533 p
= rs
->buf
.data ();
14534 while (*p
&& *p
!= 'l')
14536 parse_tracepoint_definition (p
, utpp
);
14537 /* Ask for another packet of tracepoint definition. */
14539 getpkt (&rs
->buf
, 0);
14540 p
= rs
->buf
.data ();
14546 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14548 struct remote_state
*rs
= get_remote_state ();
14551 /* Ask for a first packet of variable definition. */
14553 getpkt (&rs
->buf
, 0);
14554 p
= rs
->buf
.data ();
14555 while (*p
&& *p
!= 'l')
14557 parse_tsv_definition (p
, utsvp
);
14558 /* Ask for another packet of variable definition. */
14560 getpkt (&rs
->buf
, 0);
14561 p
= rs
->buf
.data ();
14566 /* The "set/show range-stepping" show hook. */
14569 show_range_stepping (struct ui_file
*file
, int from_tty
,
14570 struct cmd_list_element
*c
,
14573 fprintf_filtered (file
,
14574 _("Debugger's willingness to use range stepping "
14575 "is %s.\n"), value
);
14578 /* Return true if the vCont;r action is supported by the remote
14582 remote_target::vcont_r_supported ()
14584 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14585 remote_vcont_probe ();
14587 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14588 && get_remote_state ()->supports_vCont
.r
);
14591 /* The "set/show range-stepping" set hook. */
14594 set_range_stepping (const char *ignore_args
, int from_tty
,
14595 struct cmd_list_element
*c
)
14597 /* When enabling, check whether range stepping is actually supported
14598 by the target, and warn if not. */
14599 if (use_range_stepping
)
14601 remote_target
*remote
= get_current_remote_target ();
14603 || !remote
->vcont_r_supported ())
14604 warning (_("Range stepping is not supported by the current target"));
14609 show_remote_debug (struct ui_file
*file
, int from_tty
,
14610 struct cmd_list_element
*c
, const char *value
)
14612 fprintf_filtered (file
, _("Debugging of remote protocol is %s.\n"),
14617 show_remote_timeout (struct ui_file
*file
, int from_tty
,
14618 struct cmd_list_element
*c
, const char *value
)
14620 fprintf_filtered (file
,
14621 _("Timeout limit to wait for target to respond is %s.\n"),
14625 /* Implement the "supports_memory_tagging" target_ops method. */
14628 remote_target::supports_memory_tagging ()
14630 return remote_memory_tagging_p ();
14633 /* Create the qMemTags packet given ADDRESS, LEN and TYPE. */
14636 create_fetch_memtags_request (gdb::char_vector
&packet
, CORE_ADDR address
,
14637 size_t len
, int type
)
14639 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
14641 std::string request
= string_printf ("qMemTags:%s,%s:%s",
14642 phex_nz (address
, addr_size
),
14643 phex_nz (len
, sizeof (len
)),
14644 phex_nz (type
, sizeof (type
)));
14646 strcpy (packet
.data (), request
.c_str ());
14649 /* Parse the qMemTags packet reply into TAGS.
14651 Return true if successful, false otherwise. */
14654 parse_fetch_memtags_reply (const gdb::char_vector
&reply
,
14655 gdb::byte_vector
&tags
)
14657 if (reply
.empty () || reply
[0] == 'E' || reply
[0] != 'm')
14660 /* Copy the tag data. */
14661 tags
= hex2bin (reply
.data () + 1);
14666 /* Create the QMemTags packet given ADDRESS, LEN, TYPE and TAGS. */
14669 create_store_memtags_request (gdb::char_vector
&packet
, CORE_ADDR address
,
14670 size_t len
, int type
,
14671 const gdb::byte_vector
&tags
)
14673 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
14675 /* Put together the main packet, address and length. */
14676 std::string request
= string_printf ("QMemTags:%s,%s:%s:",
14677 phex_nz (address
, addr_size
),
14678 phex_nz (len
, sizeof (len
)),
14679 phex_nz (type
, sizeof (type
)));
14680 request
+= bin2hex (tags
.data (), tags
.size ());
14682 /* Check if we have exceeded the maximum packet size. */
14683 if (packet
.size () < request
.length ())
14684 error (_("Contents too big for packet QMemTags."));
14686 strcpy (packet
.data (), request
.c_str ());
14689 /* Implement the "fetch_memtags" target_ops method. */
14692 remote_target::fetch_memtags (CORE_ADDR address
, size_t len
,
14693 gdb::byte_vector
&tags
, int type
)
14695 /* Make sure the qMemTags packet is supported. */
14696 if (!remote_memory_tagging_p ())
14697 gdb_assert_not_reached ("remote fetch_memtags called with packet disabled");
14699 struct remote_state
*rs
= get_remote_state ();
14701 create_fetch_memtags_request (rs
->buf
, address
, len
, type
);
14704 getpkt (&rs
->buf
, 0);
14706 return parse_fetch_memtags_reply (rs
->buf
, tags
);
14709 /* Implement the "store_memtags" target_ops method. */
14712 remote_target::store_memtags (CORE_ADDR address
, size_t len
,
14713 const gdb::byte_vector
&tags
, int type
)
14715 /* Make sure the QMemTags packet is supported. */
14716 if (!remote_memory_tagging_p ())
14717 gdb_assert_not_reached ("remote store_memtags called with packet disabled");
14719 struct remote_state
*rs
= get_remote_state ();
14721 create_store_memtags_request (rs
->buf
, address
, len
, type
, tags
);
14724 getpkt (&rs
->buf
, 0);
14726 /* Verify if the request was successful. */
14727 return packet_check_result (rs
->buf
.data ()) == PACKET_OK
;
14730 /* Return true if remote target T is non-stop. */
14733 remote_target_is_non_stop_p (remote_target
*t
)
14735 scoped_restore_current_thread restore_thread
;
14736 switch_to_target_no_thread (t
);
14738 return target_is_non_stop_p ();
14743 namespace selftests
{
14746 test_memory_tagging_functions ()
14748 remote_target remote
;
14750 struct packet_config
*config
14751 = &remote_protocol_packets
[PACKET_memory_tagging_feature
];
14753 scoped_restore restore_memtag_support_
14754 = make_scoped_restore (&config
->support
);
14756 /* Test memory tagging packet support. */
14757 config
->support
= PACKET_SUPPORT_UNKNOWN
;
14758 SELF_CHECK (remote
.supports_memory_tagging () == false);
14759 config
->support
= PACKET_DISABLE
;
14760 SELF_CHECK (remote
.supports_memory_tagging () == false);
14761 config
->support
= PACKET_ENABLE
;
14762 SELF_CHECK (remote
.supports_memory_tagging () == true);
14764 /* Setup testing. */
14765 gdb::char_vector packet
;
14766 gdb::byte_vector tags
, bv
;
14767 std::string expected
, reply
;
14768 packet
.resize (32000);
14770 /* Test creating a qMemTags request. */
14772 expected
= "qMemTags:0,0:0";
14773 create_fetch_memtags_request (packet
, 0x0, 0x0, 0);
14774 SELF_CHECK (strcmp (packet
.data (), expected
.c_str ()) == 0);
14776 expected
= "qMemTags:deadbeef,10:1";
14777 create_fetch_memtags_request (packet
, 0xdeadbeef, 16, 1);
14778 SELF_CHECK (strcmp (packet
.data (), expected
.c_str ()) == 0);
14780 /* Test parsing a qMemTags reply. */
14782 /* Error reply, tags vector unmodified. */
14784 strcpy (packet
.data (), reply
.c_str ());
14786 SELF_CHECK (parse_fetch_memtags_reply (packet
, tags
) == false);
14787 SELF_CHECK (tags
.size () == 0);
14789 /* Valid reply, tags vector updated. */
14793 for (int i
= 0; i
< 5; i
++)
14796 reply
= "m" + bin2hex (bv
.data (), bv
.size ());
14797 strcpy (packet
.data (), reply
.c_str ());
14799 SELF_CHECK (parse_fetch_memtags_reply (packet
, tags
) == true);
14800 SELF_CHECK (tags
.size () == 5);
14802 for (int i
= 0; i
< 5; i
++)
14803 SELF_CHECK (tags
[i
] == i
);
14805 /* Test creating a QMemTags request. */
14807 /* Empty tag data. */
14809 expected
= "QMemTags:0,0:0:";
14810 create_store_memtags_request (packet
, 0x0, 0x0, 0, tags
);
14811 SELF_CHECK (memcmp (packet
.data (), expected
.c_str (),
14812 expected
.length ()) == 0);
14814 /* Non-empty tag data. */
14816 for (int i
= 0; i
< 5; i
++)
14817 tags
.push_back (i
);
14818 expected
= "QMemTags:deadbeef,ff:1:0001020304";
14819 create_store_memtags_request (packet
, 0xdeadbeef, 255, 1, tags
);
14820 SELF_CHECK (memcmp (packet
.data (), expected
.c_str (),
14821 expected
.length ()) == 0);
14824 } // namespace selftests
14825 #endif /* GDB_SELF_TEST */
14827 void _initialize_remote ();
14829 _initialize_remote ()
14831 /* architecture specific data */
14832 remote_g_packet_data_handle
=
14833 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14835 add_target (remote_target_info
, remote_target::open
);
14836 add_target (extended_remote_target_info
, extended_remote_target::open
);
14838 /* Hook into new objfile notification. */
14839 gdb::observers::new_objfile
.attach (remote_new_objfile
, "remote");
14842 init_remote_threadtests ();
14845 /* set/show remote ... */
14847 add_basic_prefix_cmd ("remote", class_maintenance
, _("\
14848 Remote protocol specific variables.\n\
14849 Configure various remote-protocol specific variables such as\n\
14850 the packets being used."),
14851 &remote_set_cmdlist
,
14852 0 /* allow-unknown */, &setlist
);
14853 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14854 Remote protocol specific variables.\n\
14855 Configure various remote-protocol specific variables such as\n\
14856 the packets being used."),
14857 &remote_show_cmdlist
,
14858 0 /* allow-unknown */, &showlist
);
14860 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14861 Compare section data on target to the exec file.\n\
14862 Argument is a single section name (default: all loaded sections).\n\
14863 To compare only read-only loaded sections, specify the -r option."),
14866 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14867 Send an arbitrary packet to a remote target.\n\
14868 maintenance packet TEXT\n\
14869 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14870 this command sends the string TEXT to the inferior, and displays the\n\
14871 response packet. GDB supplies the initial `$' character, and the\n\
14872 terminating `#' character and checksum."),
14875 set_show_commands remotebreak_cmds
14876 = add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14877 Set whether to send break if interrupted."), _("\
14878 Show whether to send break if interrupted."), _("\
14879 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14880 set_remotebreak
, show_remotebreak
,
14881 &setlist
, &showlist
);
14882 deprecate_cmd (remotebreak_cmds
.set
, "set remote interrupt-sequence");
14883 deprecate_cmd (remotebreak_cmds
.show
, "show remote interrupt-sequence");
14885 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14886 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14888 Set interrupt sequence to remote target."), _("\
14889 Show interrupt sequence to remote target."), _("\
14890 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14891 NULL
, show_interrupt_sequence
,
14892 &remote_set_cmdlist
,
14893 &remote_show_cmdlist
);
14895 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14896 &interrupt_on_connect
, _("\
14897 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14898 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14899 If set, interrupt sequence is sent to remote target."),
14901 &remote_set_cmdlist
, &remote_show_cmdlist
);
14903 /* Install commands for configuring memory read/write packets. */
14905 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14906 Set the maximum number of bytes per memory write packet (deprecated)."),
14908 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14909 Show the maximum number of bytes per memory write packet (deprecated)."),
14911 add_cmd ("memory-write-packet-size", no_class
,
14912 set_memory_write_packet_size
, _("\
14913 Set the maximum number of bytes per memory-write packet.\n\
14914 Specify the number of bytes in a packet or 0 (zero) for the\n\
14915 default packet size. The actual limit is further reduced\n\
14916 dependent on the target. Specify ``fixed'' to disable the\n\
14917 further restriction and ``limit'' to enable that restriction."),
14918 &remote_set_cmdlist
);
14919 add_cmd ("memory-read-packet-size", no_class
,
14920 set_memory_read_packet_size
, _("\
14921 Set the maximum number of bytes per memory-read packet.\n\
14922 Specify the number of bytes in a packet or 0 (zero) for the\n\
14923 default packet size. The actual limit is further reduced\n\
14924 dependent on the target. Specify ``fixed'' to disable the\n\
14925 further restriction and ``limit'' to enable that restriction."),
14926 &remote_set_cmdlist
);
14927 add_cmd ("memory-write-packet-size", no_class
,
14928 show_memory_write_packet_size
,
14929 _("Show the maximum number of bytes per memory-write packet."),
14930 &remote_show_cmdlist
);
14931 add_cmd ("memory-read-packet-size", no_class
,
14932 show_memory_read_packet_size
,
14933 _("Show the maximum number of bytes per memory-read packet."),
14934 &remote_show_cmdlist
);
14936 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14937 &remote_hw_watchpoint_limit
, _("\
14938 Set the maximum number of target hardware watchpoints."), _("\
14939 Show the maximum number of target hardware watchpoints."), _("\
14940 Specify \"unlimited\" for unlimited hardware watchpoints."),
14941 NULL
, show_hardware_watchpoint_limit
,
14942 &remote_set_cmdlist
,
14943 &remote_show_cmdlist
);
14944 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14946 &remote_hw_watchpoint_length_limit
, _("\
14947 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14948 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14949 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14950 NULL
, show_hardware_watchpoint_length_limit
,
14951 &remote_set_cmdlist
, &remote_show_cmdlist
);
14952 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14953 &remote_hw_breakpoint_limit
, _("\
14954 Set the maximum number of target hardware breakpoints."), _("\
14955 Show the maximum number of target hardware breakpoints."), _("\
14956 Specify \"unlimited\" for unlimited hardware breakpoints."),
14957 NULL
, show_hardware_breakpoint_limit
,
14958 &remote_set_cmdlist
, &remote_show_cmdlist
);
14960 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14961 &remote_address_size
, _("\
14962 Set the maximum size of the address (in bits) in a memory packet."), _("\
14963 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14965 NULL
, /* FIXME: i18n: */
14966 &setlist
, &showlist
);
14968 init_all_packet_configs ();
14970 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14971 "X", "binary-download", 1);
14973 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14974 "vCont", "verbose-resume", 0);
14976 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14977 "QPassSignals", "pass-signals", 0);
14979 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14980 "QCatchSyscalls", "catch-syscalls", 0);
14982 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14983 "QProgramSignals", "program-signals", 0);
14985 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14986 "QSetWorkingDir", "set-working-dir", 0);
14988 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14989 "QStartupWithShell", "startup-with-shell", 0);
14991 add_packet_config_cmd (&remote_protocol_packets
14992 [PACKET_QEnvironmentHexEncoded
],
14993 "QEnvironmentHexEncoded", "environment-hex-encoded",
14996 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14997 "QEnvironmentReset", "environment-reset",
15000 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
15001 "QEnvironmentUnset", "environment-unset",
15004 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
15005 "qSymbol", "symbol-lookup", 0);
15007 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
15008 "P", "set-register", 1);
15010 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
15011 "p", "fetch-register", 1);
15013 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
15014 "Z0", "software-breakpoint", 0);
15016 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
15017 "Z1", "hardware-breakpoint", 0);
15019 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
15020 "Z2", "write-watchpoint", 0);
15022 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
15023 "Z3", "read-watchpoint", 0);
15025 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
15026 "Z4", "access-watchpoint", 0);
15028 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
15029 "qXfer:auxv:read", "read-aux-vector", 0);
15031 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
15032 "qXfer:exec-file:read", "pid-to-exec-file", 0);
15034 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
15035 "qXfer:features:read", "target-features", 0);
15037 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
15038 "qXfer:libraries:read", "library-info", 0);
15040 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
15041 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
15043 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
15044 "qXfer:memory-map:read", "memory-map", 0);
15046 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
15047 "qXfer:osdata:read", "osdata", 0);
15049 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
15050 "qXfer:threads:read", "threads", 0);
15052 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
15053 "qXfer:siginfo:read", "read-siginfo-object", 0);
15055 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
15056 "qXfer:siginfo:write", "write-siginfo-object", 0);
15058 add_packet_config_cmd
15059 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
15060 "qXfer:traceframe-info:read", "traceframe-info", 0);
15062 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
15063 "qXfer:uib:read", "unwind-info-block", 0);
15065 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
15066 "qGetTLSAddr", "get-thread-local-storage-address",
15069 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
15070 "qGetTIBAddr", "get-thread-information-block-address",
15073 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
15074 "bc", "reverse-continue", 0);
15076 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
15077 "bs", "reverse-step", 0);
15079 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
15080 "qSupported", "supported-packets", 0);
15082 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
15083 "qSearch:memory", "search-memory", 0);
15085 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
15086 "qTStatus", "trace-status", 0);
15088 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
15089 "vFile:setfs", "hostio-setfs", 0);
15091 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
15092 "vFile:open", "hostio-open", 0);
15094 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
15095 "vFile:pread", "hostio-pread", 0);
15097 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
15098 "vFile:pwrite", "hostio-pwrite", 0);
15100 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
15101 "vFile:close", "hostio-close", 0);
15103 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
15104 "vFile:unlink", "hostio-unlink", 0);
15106 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
15107 "vFile:readlink", "hostio-readlink", 0);
15109 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
15110 "vFile:fstat", "hostio-fstat", 0);
15112 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
15113 "vAttach", "attach", 0);
15115 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
15118 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
15119 "QStartNoAckMode", "noack", 0);
15121 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
15122 "vKill", "kill", 0);
15124 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
15125 "qAttached", "query-attached", 0);
15127 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
15128 "ConditionalTracepoints",
15129 "conditional-tracepoints", 0);
15131 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
15132 "ConditionalBreakpoints",
15133 "conditional-breakpoints", 0);
15135 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
15136 "BreakpointCommands",
15137 "breakpoint-commands", 0);
15139 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
15140 "FastTracepoints", "fast-tracepoints", 0);
15142 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
15143 "TracepointSource", "TracepointSource", 0);
15145 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
15146 "QAllow", "allow", 0);
15148 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
15149 "StaticTracepoints", "static-tracepoints", 0);
15151 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
15152 "InstallInTrace", "install-in-trace", 0);
15154 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
15155 "qXfer:statictrace:read", "read-sdata-object", 0);
15157 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
15158 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
15160 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
15161 "QDisableRandomization", "disable-randomization", 0);
15163 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
15164 "QAgent", "agent", 0);
15166 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
15167 "QTBuffer:size", "trace-buffer-size", 0);
15169 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
15170 "Qbtrace:off", "disable-btrace", 0);
15172 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
15173 "Qbtrace:bts", "enable-btrace-bts", 0);
15175 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
15176 "Qbtrace:pt", "enable-btrace-pt", 0);
15178 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
15179 "qXfer:btrace", "read-btrace", 0);
15181 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
15182 "qXfer:btrace-conf", "read-btrace-conf", 0);
15184 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
15185 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
15187 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
15188 "multiprocess-feature", "multiprocess-feature", 0);
15190 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
15191 "swbreak-feature", "swbreak-feature", 0);
15193 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
15194 "hwbreak-feature", "hwbreak-feature", 0);
15196 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
15197 "fork-event-feature", "fork-event-feature", 0);
15199 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
15200 "vfork-event-feature", "vfork-event-feature", 0);
15202 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
15203 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
15205 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
15206 "vContSupported", "verbose-resume-supported", 0);
15208 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
15209 "exec-event-feature", "exec-event-feature", 0);
15211 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
15212 "vCtrlC", "ctrl-c", 0);
15214 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
15215 "QThreadEvents", "thread-events", 0);
15217 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
15218 "N stop reply", "no-resumed-stop-reply", 0);
15220 add_packet_config_cmd (&remote_protocol_packets
[PACKET_memory_tagging_feature
],
15221 "memory-tagging-feature", "memory-tagging-feature", 0);
15223 /* Assert that we've registered "set remote foo-packet" commands
15224 for all packet configs. */
15228 for (i
= 0; i
< PACKET_MAX
; i
++)
15230 /* Ideally all configs would have a command associated. Some
15231 still don't though. */
15236 case PACKET_QNonStop
:
15237 case PACKET_EnableDisableTracepoints_feature
:
15238 case PACKET_tracenz_feature
:
15239 case PACKET_DisconnectedTracing_feature
:
15240 case PACKET_augmented_libraries_svr4_read_feature
:
15242 /* Additions to this list need to be well justified:
15243 pre-existing packets are OK; new packets are not. */
15251 /* This catches both forgetting to add a config command, and
15252 forgetting to remove a packet from the exception list. */
15253 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
15257 /* Keep the old ``set remote Z-packet ...'' working. Each individual
15258 Z sub-packet has its own set and show commands, but users may
15259 have sets to this variable in their .gdbinit files (or in their
15261 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
15262 &remote_Z_packet_detect
, _("\
15263 Set use of remote protocol `Z' packets."), _("\
15264 Show use of remote protocol `Z' packets."), _("\
15265 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
15267 set_remote_protocol_Z_packet_cmd
,
15268 show_remote_protocol_Z_packet_cmd
,
15269 /* FIXME: i18n: Use of remote protocol
15270 `Z' packets is %s. */
15271 &remote_set_cmdlist
, &remote_show_cmdlist
);
15273 add_basic_prefix_cmd ("remote", class_files
, _("\
15274 Manipulate files on the remote system.\n\
15275 Transfer files to and from the remote target system."),
15277 0 /* allow-unknown */, &cmdlist
);
15279 add_cmd ("put", class_files
, remote_put_command
,
15280 _("Copy a local file to the remote system."),
15283 add_cmd ("get", class_files
, remote_get_command
,
15284 _("Copy a remote file to the local system."),
15287 add_cmd ("delete", class_files
, remote_delete_command
,
15288 _("Delete a remote file."),
15291 add_setshow_string_noescape_cmd ("exec-file", class_files
,
15292 &remote_exec_file_var
, _("\
15293 Set the remote pathname for \"run\"."), _("\
15294 Show the remote pathname for \"run\"."), NULL
,
15295 set_remote_exec_file
,
15296 show_remote_exec_file
,
15297 &remote_set_cmdlist
,
15298 &remote_show_cmdlist
);
15300 add_setshow_boolean_cmd ("range-stepping", class_run
,
15301 &use_range_stepping
, _("\
15302 Enable or disable range stepping."), _("\
15303 Show whether target-assisted range stepping is enabled."), _("\
15304 If on, and the target supports it, when stepping a source line, GDB\n\
15305 tells the target to step the corresponding range of addresses itself instead\n\
15306 of issuing multiple single-steps. This speeds up source level\n\
15307 stepping. If off, GDB always issues single-steps, even if range\n\
15308 stepping is supported by the target. The default is on."),
15309 set_range_stepping
,
15310 show_range_stepping
,
15314 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
15315 Set watchdog timer."), _("\
15316 Show watchdog timer."), _("\
15317 When non-zero, this timeout is used instead of waiting forever for a target\n\
15318 to finish a low-level step or continue operation. If the specified amount\n\
15319 of time passes without a response from the target, an error occurs."),
15322 &setlist
, &showlist
);
15324 add_setshow_zuinteger_unlimited_cmd ("remote-packet-max-chars", no_class
,
15325 &remote_packet_max_chars
, _("\
15326 Set the maximum number of characters to display for each remote packet."), _("\
15327 Show the maximum number of characters to display for each remote packet."), _("\
15328 Specify \"unlimited\" to display all the characters."),
15329 NULL
, show_remote_packet_max_chars
,
15330 &setdebuglist
, &showdebuglist
);
15332 add_setshow_boolean_cmd ("remote", no_class
, &remote_debug
,
15333 _("Set debugging of remote protocol."),
15334 _("Show debugging of remote protocol."),
15336 When enabled, each packet sent or received with the remote target\n\
15340 &setdebuglist
, &showdebuglist
);
15342 add_setshow_zuinteger_unlimited_cmd ("remotetimeout", no_class
,
15343 &remote_timeout
, _("\
15344 Set timeout limit to wait for target to respond."), _("\
15345 Show timeout limit to wait for target to respond."), _("\
15346 This value is used to set the time limit for gdb to wait for a response\n\
15347 from the target."),
15349 show_remote_timeout
,
15350 &setlist
, &showlist
);
15352 /* Eventually initialize fileio. See fileio.c */
15353 initialize_remote_fileio (&remote_set_cmdlist
, &remote_show_cmdlist
);
15356 selftests::register_test ("remote_memory_tagging",
15357 selftests::test_memory_tagging_functions
);