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
, ULONGEST 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 (inferior
*, ptid_t
, target_waitkind
, 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 print_one_stopped_thread (thread_info
*thread
);
770 void process_initial_stop_replies (int from_tty
);
772 thread_info
*remote_add_thread (ptid_t ptid
, bool running
, bool executing
);
774 void btrace_sync_conf (const btrace_config
*conf
);
776 void remote_btrace_maybe_reopen ();
778 void remove_new_fork_children (threads_listing_context
*context
);
779 void kill_new_fork_children (int pid
);
780 void discard_pending_stop_replies (struct inferior
*inf
);
781 int stop_reply_queue_length ();
783 void check_pending_events_prevent_wildcard_vcont
784 (bool *may_global_wildcard_vcont
);
786 void discard_pending_stop_replies_in_queue ();
787 struct stop_reply
*remote_notif_remove_queued_reply (ptid_t ptid
);
788 struct stop_reply
*queued_stop_reply (ptid_t ptid
);
789 int peek_stop_reply (ptid_t ptid
);
790 void remote_parse_stop_reply (const char *buf
, stop_reply
*event
);
792 void remote_stop_ns (ptid_t ptid
);
793 void remote_interrupt_as ();
794 void remote_interrupt_ns ();
796 char *remote_get_noisy_reply ();
797 int remote_query_attached (int pid
);
798 inferior
*remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
801 ptid_t
remote_current_thread (ptid_t oldpid
);
802 ptid_t
get_current_thread (const char *wait_status
);
804 void set_thread (ptid_t ptid
, int gen
);
805 void set_general_thread (ptid_t ptid
);
806 void set_continue_thread (ptid_t ptid
);
807 void set_general_process ();
809 char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
811 int remote_unpack_thread_info_response (const char *pkt
, threadref
*expectedref
,
812 gdb_ext_thread_info
*info
);
813 int remote_get_threadinfo (threadref
*threadid
, int fieldset
,
814 gdb_ext_thread_info
*info
);
816 int parse_threadlist_response (const char *pkt
, int result_limit
,
817 threadref
*original_echo
,
818 threadref
*resultlist
,
820 int remote_get_threadlist (int startflag
, threadref
*nextthread
,
821 int result_limit
, int *done
, int *result_count
,
822 threadref
*threadlist
);
824 int remote_threadlist_iterator (rmt_thread_action stepfunction
,
825 void *context
, int looplimit
);
827 int remote_get_threads_with_ql (threads_listing_context
*context
);
828 int remote_get_threads_with_qxfer (threads_listing_context
*context
);
829 int remote_get_threads_with_qthreadinfo (threads_listing_context
*context
);
831 void extended_remote_restart ();
835 void remote_check_symbols ();
837 void remote_supported_packet (const struct protocol_feature
*feature
,
838 enum packet_support support
,
839 const char *argument
);
841 void remote_query_supported ();
843 void remote_packet_size (const protocol_feature
*feature
,
844 packet_support support
, const char *value
);
846 void remote_serial_quit_handler ();
848 void remote_detach_pid (int pid
);
850 void remote_vcont_probe ();
852 void remote_resume_with_hc (ptid_t ptid
, int step
,
855 void send_interrupt_sequence ();
856 void interrupt_query ();
858 void remote_notif_get_pending_events (notif_client
*nc
);
860 int fetch_register_using_p (struct regcache
*regcache
,
862 int send_g_packet ();
863 void process_g_packet (struct regcache
*regcache
);
864 void fetch_registers_using_g (struct regcache
*regcache
);
865 int store_register_using_P (const struct regcache
*regcache
,
867 void store_registers_using_G (const struct regcache
*regcache
);
869 void set_remote_traceframe ();
871 void check_binary_download (CORE_ADDR addr
);
873 target_xfer_status
remote_write_bytes_aux (const char *header
,
875 const gdb_byte
*myaddr
,
878 ULONGEST
*xfered_len_units
,
882 target_xfer_status
remote_write_bytes (CORE_ADDR memaddr
,
883 const gdb_byte
*myaddr
, ULONGEST len
,
884 int unit_size
, ULONGEST
*xfered_len
);
886 target_xfer_status
remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
888 int unit_size
, ULONGEST
*xfered_len_units
);
890 target_xfer_status
remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
894 ULONGEST
*xfered_len
);
896 target_xfer_status
remote_read_bytes (CORE_ADDR memaddr
,
897 gdb_byte
*myaddr
, ULONGEST len
,
899 ULONGEST
*xfered_len
);
901 packet_result
remote_send_printf (const char *format
, ...)
902 ATTRIBUTE_PRINTF (2, 3);
904 target_xfer_status
remote_flash_write (ULONGEST address
,
905 ULONGEST length
, ULONGEST
*xfered_len
,
906 const gdb_byte
*data
);
908 int readchar (int timeout
);
910 void remote_serial_write (const char *str
, int len
);
912 int putpkt (const char *buf
);
913 int putpkt_binary (const char *buf
, int cnt
);
915 int putpkt (const gdb::char_vector
&buf
)
917 return putpkt (buf
.data ());
921 long read_frame (gdb::char_vector
*buf_p
);
922 void getpkt (gdb::char_vector
*buf
, int forever
);
923 int getpkt_or_notif_sane_1 (gdb::char_vector
*buf
, int forever
,
924 int expecting_notif
, int *is_notif
);
925 int getpkt_sane (gdb::char_vector
*buf
, int forever
);
926 int getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
928 int remote_vkill (int pid
);
929 void remote_kill_k ();
931 void extended_remote_disable_randomization (int val
);
932 int extended_remote_run (const std::string
&args
);
934 void send_environment_packet (const char *action
,
938 void extended_remote_environment_support ();
939 void extended_remote_set_inferior_cwd ();
941 target_xfer_status
remote_write_qxfer (const char *object_name
,
943 const gdb_byte
*writebuf
,
944 ULONGEST offset
, LONGEST len
,
945 ULONGEST
*xfered_len
,
946 struct packet_config
*packet
);
948 target_xfer_status
remote_read_qxfer (const char *object_name
,
950 gdb_byte
*readbuf
, ULONGEST offset
,
952 ULONGEST
*xfered_len
,
953 struct packet_config
*packet
);
955 void push_stop_reply (struct stop_reply
*new_event
);
957 bool vcont_r_supported ();
959 void packet_command (const char *args
, int from_tty
);
961 private: /* data fields */
963 /* The remote state. Don't reference this directly. Use the
964 get_remote_state method instead. */
965 remote_state m_remote_state
;
968 static const target_info extended_remote_target_info
= {
970 N_("Extended remote serial target in gdb-specific protocol"),
974 /* Set up the extended remote target by extending the standard remote
975 target and adding to it. */
977 class extended_remote_target final
: public remote_target
980 const target_info
&info () const override
981 { return extended_remote_target_info
; }
983 /* Open an extended-remote connection. */
984 static void open (const char *, int);
986 bool can_create_inferior () override
{ return true; }
987 void create_inferior (const char *, const std::string
&,
988 char **, int) override
;
990 void detach (inferior
*, int) override
;
992 bool can_attach () override
{ return true; }
993 void attach (const char *, int) override
;
995 void post_attach (int) override
;
996 bool supports_disable_randomization () override
;
999 /* Per-program-space data key. */
1000 static const struct program_space_key
<char, gdb::xfree_deleter
<char>>
1003 /* The variable registered as the control variable used by the
1004 remote exec-file commands. While the remote exec-file setting is
1005 per-program-space, the set/show machinery uses this as the
1006 location of the remote exec-file value. */
1007 static std::string remote_exec_file_var
;
1009 /* The size to align memory write packets, when practical. The protocol
1010 does not guarantee any alignment, and gdb will generate short
1011 writes and unaligned writes, but even as a best-effort attempt this
1012 can improve bulk transfers. For instance, if a write is misaligned
1013 relative to the target's data bus, the stub may need to make an extra
1014 round trip fetching data from the target. This doesn't make a
1015 huge difference, but it's easy to do, so we try to be helpful.
1017 The alignment chosen is arbitrary; usually data bus width is
1018 important here, not the possibly larger cache line size. */
1019 enum { REMOTE_ALIGN_WRITES
= 16 };
1021 /* Prototypes for local functions. */
1023 static int hexnumlen (ULONGEST num
);
1025 static int stubhex (int ch
);
1027 static int hexnumstr (char *, ULONGEST
);
1029 static int hexnumnstr (char *, ULONGEST
, int);
1031 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
1033 static void print_packet (const char *);
1035 static int stub_unpack_int (const char *buff
, int fieldlength
);
1037 struct packet_config
;
1039 static void show_packet_config_cmd (struct packet_config
*config
);
1041 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
1043 struct cmd_list_element
*c
,
1046 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
1048 static void remote_async_inferior_event_handler (gdb_client_data
);
1050 static bool remote_read_description_p (struct target_ops
*target
);
1052 static void remote_console_output (const char *msg
);
1054 static void remote_btrace_reset (remote_state
*rs
);
1056 static void remote_unpush_and_throw (remote_target
*target
);
1060 static struct cmd_list_element
*remote_cmdlist
;
1062 /* For "set remote" and "show remote". */
1064 static struct cmd_list_element
*remote_set_cmdlist
;
1065 static struct cmd_list_element
*remote_show_cmdlist
;
1067 /* Controls whether GDB is willing to use range stepping. */
1069 static bool use_range_stepping
= true;
1071 /* From the remote target's point of view, each thread is in one of these three
1073 enum class resume_state
1075 /* Not resumed - we haven't been asked to resume this thread. */
1078 /* We have been asked to resume this thread, but haven't sent a vCont action
1079 for it yet. We'll need to consider it next time commit_resume is
1081 RESUMED_PENDING_VCONT
,
1083 /* We have been asked to resume this thread, and we have sent a vCont action
1088 /* Information about a thread's pending vCont-resume. Used when a thread is in
1089 the remote_resume_state::RESUMED_PENDING_VCONT state. remote_target::resume
1090 stores this information which is then picked up by
1091 remote_target::commit_resume to know which is the proper action for this
1092 thread to include in the vCont packet. */
1093 struct resumed_pending_vcont_info
1095 /* True if the last resume call for this thread was a step request, false
1096 if a continue request. */
1099 /* The signal specified in the last resume call for this thread. */
1103 /* Private data that we'll store in (struct thread_info)->priv. */
1104 struct remote_thread_info
: public private_thread_info
1110 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1111 sequence of bytes. */
1112 gdb::byte_vector thread_handle
;
1114 /* Whether the target stopped for a breakpoint/watchpoint. */
1115 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1117 /* This is set to the data address of the access causing the target
1118 to stop for a watchpoint. */
1119 CORE_ADDR watch_data_address
= 0;
1121 /* Get the thread's resume state. */
1122 enum resume_state
get_resume_state () const
1124 return m_resume_state
;
1127 /* Put the thread in the NOT_RESUMED state. */
1128 void set_not_resumed ()
1130 m_resume_state
= resume_state::NOT_RESUMED
;
1133 /* Put the thread in the RESUMED_PENDING_VCONT state. */
1134 void set_resumed_pending_vcont (bool step
, gdb_signal sig
)
1136 m_resume_state
= resume_state::RESUMED_PENDING_VCONT
;
1137 m_resumed_pending_vcont_info
.step
= step
;
1138 m_resumed_pending_vcont_info
.sig
= sig
;
1141 /* Get the information this thread's pending vCont-resumption.
1143 Must only be called if the thread is in the RESUMED_PENDING_VCONT resume
1145 const struct resumed_pending_vcont_info
&resumed_pending_vcont_info () const
1147 gdb_assert (m_resume_state
== resume_state::RESUMED_PENDING_VCONT
);
1149 return m_resumed_pending_vcont_info
;
1152 /* Put the thread in the VCONT_RESUMED state. */
1155 m_resume_state
= resume_state::RESUMED
;
1159 /* Resume state for this thread. This is used to implement vCont action
1160 coalescing (only when the target operates in non-stop mode).
1162 remote_target::resume moves the thread to the RESUMED_PENDING_VCONT state,
1163 which notes that this thread must be considered in the next commit_resume
1166 remote_target::commit_resume sends a vCont packet with actions for the
1167 threads in the RESUMED_PENDING_VCONT state and moves them to the
1168 VCONT_RESUMED state.
1170 When reporting a stop to the core for a thread, that thread is moved back
1171 to the NOT_RESUMED state. */
1172 enum resume_state m_resume_state
= resume_state::NOT_RESUMED
;
1174 /* Extra info used if the thread is in the RESUMED_PENDING_VCONT state. */
1175 struct resumed_pending_vcont_info m_resumed_pending_vcont_info
;
1178 remote_state::remote_state ()
1183 remote_state::~remote_state ()
1185 xfree (this->last_pass_packet
);
1186 xfree (this->last_program_signals_packet
);
1187 xfree (this->finished_object
);
1188 xfree (this->finished_annex
);
1191 /* Utility: generate error from an incoming stub packet. */
1193 trace_error (char *buf
)
1196 return; /* not an error msg */
1199 case '1': /* malformed packet error */
1200 if (*++buf
== '0') /* general case: */
1201 error (_("remote.c: error in outgoing packet."));
1203 error (_("remote.c: error in outgoing packet at field #%ld."),
1204 strtol (buf
, NULL
, 16));
1206 error (_("Target returns error code '%s'."), buf
);
1210 /* Utility: wait for reply from stub, while accepting "O" packets. */
1213 remote_target::remote_get_noisy_reply ()
1215 struct remote_state
*rs
= get_remote_state ();
1217 do /* Loop on reply from remote stub. */
1221 QUIT
; /* Allow user to bail out with ^C. */
1222 getpkt (&rs
->buf
, 0);
1223 buf
= rs
->buf
.data ();
1226 else if (startswith (buf
, "qRelocInsn:"))
1229 CORE_ADDR from
, to
, org_to
;
1231 int adjusted_size
= 0;
1234 p
= buf
+ strlen ("qRelocInsn:");
1235 pp
= unpack_varlen_hex (p
, &ul
);
1237 error (_("invalid qRelocInsn packet: %s"), buf
);
1241 unpack_varlen_hex (p
, &ul
);
1248 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
1251 catch (const gdb_exception
&ex
)
1253 if (ex
.error
== MEMORY_ERROR
)
1255 /* Propagate memory errors silently back to the
1256 target. The stub may have limited the range of
1257 addresses we can write to, for example. */
1261 /* Something unexpectedly bad happened. Be verbose
1262 so we can tell what, and propagate the error back
1263 to the stub, so it doesn't get stuck waiting for
1265 exception_fprintf (gdb_stderr
, ex
,
1266 _("warning: relocating instruction: "));
1273 adjusted_size
= to
- org_to
;
1275 xsnprintf (buf
, rs
->buf
.size (), "qRelocInsn:%x", adjusted_size
);
1279 else if (buf
[0] == 'O' && buf
[1] != 'K')
1280 remote_console_output (buf
+ 1); /* 'O' message from stub */
1282 return buf
; /* Here's the actual reply. */
1287 struct remote_arch_state
*
1288 remote_state::get_remote_arch_state (struct gdbarch
*gdbarch
)
1290 remote_arch_state
*rsa
;
1292 auto it
= this->m_arch_states
.find (gdbarch
);
1293 if (it
== this->m_arch_states
.end ())
1295 auto p
= this->m_arch_states
.emplace (std::piecewise_construct
,
1296 std::forward_as_tuple (gdbarch
),
1297 std::forward_as_tuple (gdbarch
));
1298 rsa
= &p
.first
->second
;
1300 /* Make sure that the packet buffer is plenty big enough for
1301 this architecture. */
1302 if (this->buf
.size () < rsa
->remote_packet_size
)
1303 this->buf
.resize (2 * rsa
->remote_packet_size
);
1311 /* Fetch the global remote target state. */
1314 remote_target::get_remote_state ()
1316 /* Make sure that the remote architecture state has been
1317 initialized, because doing so might reallocate rs->buf. Any
1318 function which calls getpkt also needs to be mindful of changes
1319 to rs->buf, but this call limits the number of places which run
1321 m_remote_state
.get_remote_arch_state (target_gdbarch ());
1323 return &m_remote_state
;
1326 /* Fetch the remote exec-file from the current program space. */
1329 get_remote_exec_file (void)
1331 char *remote_exec_file
;
1333 remote_exec_file
= remote_pspace_data
.get (current_program_space
);
1334 if (remote_exec_file
== NULL
)
1337 return remote_exec_file
;
1340 /* Set the remote exec file for PSPACE. */
1343 set_pspace_remote_exec_file (struct program_space
*pspace
,
1344 const char *remote_exec_file
)
1346 char *old_file
= remote_pspace_data
.get (pspace
);
1349 remote_pspace_data
.set (pspace
, xstrdup (remote_exec_file
));
1352 /* The "set/show remote exec-file" set command hook. */
1355 set_remote_exec_file (const char *ignored
, int from_tty
,
1356 struct cmd_list_element
*c
)
1358 set_pspace_remote_exec_file (current_program_space
,
1359 remote_exec_file_var
.c_str ());
1362 /* The "set/show remote exec-file" show command hook. */
1365 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
1366 struct cmd_list_element
*cmd
, const char *value
)
1368 fprintf_filtered (file
, "%s\n", get_remote_exec_file ());
1372 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
1374 int regnum
, num_remote_regs
, offset
;
1375 struct packet_reg
**remote_regs
;
1377 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
1379 struct packet_reg
*r
= ®s
[regnum
];
1381 if (register_size (gdbarch
, regnum
) == 0)
1382 /* Do not try to fetch zero-sized (placeholder) registers. */
1385 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
1390 /* Define the g/G packet format as the contents of each register
1391 with a remote protocol number, in order of ascending protocol
1394 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
1395 for (num_remote_regs
= 0, regnum
= 0;
1396 regnum
< gdbarch_num_regs (gdbarch
);
1398 if (regs
[regnum
].pnum
!= -1)
1399 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
1401 std::sort (remote_regs
, remote_regs
+ num_remote_regs
,
1402 [] (const packet_reg
*a
, const packet_reg
*b
)
1403 { return a
->pnum
< b
->pnum
; });
1405 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
1407 remote_regs
[regnum
]->in_g_packet
= 1;
1408 remote_regs
[regnum
]->offset
= offset
;
1409 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
1415 /* Given the architecture described by GDBARCH, return the remote
1416 protocol register's number and the register's offset in the g/G
1417 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1418 If the target does not have a mapping for REGNUM, return false,
1419 otherwise, return true. */
1422 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
1423 int *pnum
, int *poffset
)
1425 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
1427 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
1429 map_regcache_remote_table (gdbarch
, regs
.data ());
1431 *pnum
= regs
[regnum
].pnum
;
1432 *poffset
= regs
[regnum
].offset
;
1437 remote_arch_state::remote_arch_state (struct gdbarch
*gdbarch
)
1439 /* Use the architecture to build a regnum<->pnum table, which will be
1440 1:1 unless a feature set specifies otherwise. */
1441 this->regs
.reset (new packet_reg
[gdbarch_num_regs (gdbarch
)] ());
1443 /* Record the maximum possible size of the g packet - it may turn out
1445 this->sizeof_g_packet
1446 = map_regcache_remote_table (gdbarch
, this->regs
.get ());
1448 /* Default maximum number of characters in a packet body. Many
1449 remote stubs have a hardwired buffer size of 400 bytes
1450 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1451 as the maximum packet-size to ensure that the packet and an extra
1452 NUL character can always fit in the buffer. This stops GDB
1453 trashing stubs that try to squeeze an extra NUL into what is
1454 already a full buffer (As of 1999-12-04 that was most stubs). */
1455 this->remote_packet_size
= 400 - 1;
1457 /* This one is filled in when a ``g'' packet is received. */
1458 this->actual_register_packet_size
= 0;
1460 /* Should rsa->sizeof_g_packet needs more space than the
1461 default, adjust the size accordingly. Remember that each byte is
1462 encoded as two characters. 32 is the overhead for the packet
1463 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1464 (``$NN:G...#NN'') is a better guess, the below has been padded a
1466 if (this->sizeof_g_packet
> ((this->remote_packet_size
- 32) / 2))
1467 this->remote_packet_size
= (this->sizeof_g_packet
* 2 + 32);
1470 /* Get a pointer to the current remote target. If not connected to a
1471 remote target, return NULL. */
1473 static remote_target
*
1474 get_current_remote_target ()
1476 target_ops
*proc_target
= current_inferior ()->process_target ();
1477 return dynamic_cast<remote_target
*> (proc_target
);
1480 /* Return the current allowed size of a remote packet. This is
1481 inferred from the current architecture, and should be used to
1482 limit the length of outgoing packets. */
1484 remote_target::get_remote_packet_size ()
1486 struct remote_state
*rs
= get_remote_state ();
1487 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1489 if (rs
->explicit_packet_size
)
1490 return rs
->explicit_packet_size
;
1492 return rsa
->remote_packet_size
;
1495 static struct packet_reg
*
1496 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1499 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
1503 struct packet_reg
*r
= &rsa
->regs
[regnum
];
1505 gdb_assert (r
->regnum
== regnum
);
1510 static struct packet_reg
*
1511 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1516 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
1518 struct packet_reg
*r
= &rsa
->regs
[i
];
1520 if (r
->pnum
== pnum
)
1526 /* Allow the user to specify what sequence to send to the remote
1527 when he requests a program interruption: Although ^C is usually
1528 what remote systems expect (this is the default, here), it is
1529 sometimes preferable to send a break. On other systems such
1530 as the Linux kernel, a break followed by g, which is Magic SysRq g
1531 is required in order to interrupt the execution. */
1532 const char interrupt_sequence_control_c
[] = "Ctrl-C";
1533 const char interrupt_sequence_break
[] = "BREAK";
1534 const char interrupt_sequence_break_g
[] = "BREAK-g";
1535 static const char *const interrupt_sequence_modes
[] =
1537 interrupt_sequence_control_c
,
1538 interrupt_sequence_break
,
1539 interrupt_sequence_break_g
,
1542 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
1545 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
1546 struct cmd_list_element
*c
,
1549 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
1550 fprintf_filtered (file
,
1551 _("Send the ASCII ETX character (Ctrl-c) "
1552 "to the remote target to interrupt the "
1553 "execution of the program.\n"));
1554 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
1555 fprintf_filtered (file
,
1556 _("send a break signal to the remote target "
1557 "to interrupt the execution of the program.\n"));
1558 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
1559 fprintf_filtered (file
,
1560 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1561 "the remote target to interrupt the execution "
1562 "of Linux kernel.\n"));
1564 internal_error (__FILE__
, __LINE__
,
1565 _("Invalid value for interrupt_sequence_mode: %s."),
1566 interrupt_sequence_mode
);
1569 /* This boolean variable specifies whether interrupt_sequence is sent
1570 to the remote target when gdb connects to it.
1571 This is mostly needed when you debug the Linux kernel: The Linux kernel
1572 expects BREAK g which is Magic SysRq g for connecting gdb. */
1573 static bool interrupt_on_connect
= false;
1575 /* This variable is used to implement the "set/show remotebreak" commands.
1576 Since these commands are now deprecated in favor of "set/show remote
1577 interrupt-sequence", it no longer has any effect on the code. */
1578 static bool remote_break
;
1581 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1584 interrupt_sequence_mode
= interrupt_sequence_break
;
1586 interrupt_sequence_mode
= interrupt_sequence_control_c
;
1590 show_remotebreak (struct ui_file
*file
, int from_tty
,
1591 struct cmd_list_element
*c
,
1596 /* This variable sets the number of bits in an address that are to be
1597 sent in a memory ("M" or "m") packet. Normally, after stripping
1598 leading zeros, the entire address would be sent. This variable
1599 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1600 initial implementation of remote.c restricted the address sent in
1601 memory packets to ``host::sizeof long'' bytes - (typically 32
1602 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1603 address was never sent. Since fixing this bug may cause a break in
1604 some remote targets this variable is principally provided to
1605 facilitate backward compatibility. */
1607 static unsigned int remote_address_size
;
1610 /* User configurable variables for the number of characters in a
1611 memory read/write packet. MIN (rsa->remote_packet_size,
1612 rsa->sizeof_g_packet) is the default. Some targets need smaller
1613 values (fifo overruns, et.al.) and some users need larger values
1614 (speed up transfers). The variables ``preferred_*'' (the user
1615 request), ``current_*'' (what was actually set) and ``forced_*''
1616 (Positive - a soft limit, negative - a hard limit). */
1618 struct memory_packet_config
1625 /* The default max memory-write-packet-size, when the setting is
1626 "fixed". The 16k is historical. (It came from older GDB's using
1627 alloca for buffers and the knowledge (folklore?) that some hosts
1628 don't cope very well with large alloca calls.) */
1629 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1631 /* The minimum remote packet size for memory transfers. Ensures we
1632 can write at least one byte. */
1633 #define MIN_MEMORY_PACKET_SIZE 20
1635 /* Get the memory packet size, assuming it is fixed. */
1638 get_fixed_memory_packet_size (struct memory_packet_config
*config
)
1640 gdb_assert (config
->fixed_p
);
1642 if (config
->size
<= 0)
1643 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
;
1645 return config
->size
;
1648 /* Compute the current size of a read/write packet. Since this makes
1649 use of ``actual_register_packet_size'' the computation is dynamic. */
1652 remote_target::get_memory_packet_size (struct memory_packet_config
*config
)
1654 struct remote_state
*rs
= get_remote_state ();
1655 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1658 if (config
->fixed_p
)
1659 what_they_get
= get_fixed_memory_packet_size (config
);
1662 what_they_get
= get_remote_packet_size ();
1663 /* Limit the packet to the size specified by the user. */
1664 if (config
->size
> 0
1665 && what_they_get
> config
->size
)
1666 what_they_get
= config
->size
;
1668 /* Limit it to the size of the targets ``g'' response unless we have
1669 permission from the stub to use a larger packet size. */
1670 if (rs
->explicit_packet_size
== 0
1671 && rsa
->actual_register_packet_size
> 0
1672 && what_they_get
> rsa
->actual_register_packet_size
)
1673 what_they_get
= rsa
->actual_register_packet_size
;
1675 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1676 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1678 /* Make sure there is room in the global buffer for this packet
1679 (including its trailing NUL byte). */
1680 if (rs
->buf
.size () < what_they_get
+ 1)
1681 rs
->buf
.resize (2 * what_they_get
);
1683 return what_they_get
;
1686 /* Update the size of a read/write packet. If they user wants
1687 something really big then do a sanity check. */
1690 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1692 int fixed_p
= config
->fixed_p
;
1693 long size
= config
->size
;
1696 error (_("Argument required (integer, `fixed' or `limited')."));
1697 else if (strcmp (args
, "hard") == 0
1698 || strcmp (args
, "fixed") == 0)
1700 else if (strcmp (args
, "soft") == 0
1701 || strcmp (args
, "limit") == 0)
1707 size
= strtoul (args
, &end
, 0);
1709 error (_("Invalid %s (bad syntax)."), config
->name
);
1711 /* Instead of explicitly capping the size of a packet to or
1712 disallowing it, the user is allowed to set the size to
1713 something arbitrarily large. */
1717 if (fixed_p
&& !config
->fixed_p
)
1719 /* So that the query shows the correct value. */
1720 long query_size
= (size
<= 0
1721 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1724 if (! query (_("The target may not be able to correctly handle a %s\n"
1725 "of %ld bytes. Change the packet size? "),
1726 config
->name
, query_size
))
1727 error (_("Packet size not changed."));
1729 /* Update the config. */
1730 config
->fixed_p
= fixed_p
;
1731 config
->size
= size
;
1735 show_memory_packet_size (struct memory_packet_config
*config
)
1737 if (config
->size
== 0)
1738 printf_filtered (_("The %s is 0 (default). "), config
->name
);
1740 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1741 if (config
->fixed_p
)
1742 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1743 get_fixed_memory_packet_size (config
));
1746 remote_target
*remote
= get_current_remote_target ();
1749 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1750 remote
->get_memory_packet_size (config
));
1752 puts_filtered ("The actual limit will be further reduced "
1753 "dependent on the target.\n");
1757 /* FIXME: needs to be per-remote-target. */
1758 static struct memory_packet_config memory_write_packet_config
=
1760 "memory-write-packet-size",
1764 set_memory_write_packet_size (const char *args
, int from_tty
)
1766 set_memory_packet_size (args
, &memory_write_packet_config
);
1770 show_memory_write_packet_size (const char *args
, int from_tty
)
1772 show_memory_packet_size (&memory_write_packet_config
);
1775 /* Show the number of hardware watchpoints that can be used. */
1778 show_hardware_watchpoint_limit (struct ui_file
*file
, int from_tty
,
1779 struct cmd_list_element
*c
,
1782 fprintf_filtered (file
, _("The maximum number of target hardware "
1783 "watchpoints is %s.\n"), value
);
1786 /* Show the length limit (in bytes) for hardware watchpoints. */
1789 show_hardware_watchpoint_length_limit (struct ui_file
*file
, int from_tty
,
1790 struct cmd_list_element
*c
,
1793 fprintf_filtered (file
, _("The maximum length (in bytes) of a target "
1794 "hardware watchpoint is %s.\n"), value
);
1797 /* Show the number of hardware breakpoints that can be used. */
1800 show_hardware_breakpoint_limit (struct ui_file
*file
, int from_tty
,
1801 struct cmd_list_element
*c
,
1804 fprintf_filtered (file
, _("The maximum number of target hardware "
1805 "breakpoints is %s.\n"), value
);
1808 /* Controls the maximum number of characters to display in the debug output
1809 for each remote packet. The remaining characters are omitted. */
1811 static int remote_packet_max_chars
= 512;
1813 /* Show the maximum number of characters to display for each remote packet
1814 when remote debugging is enabled. */
1817 show_remote_packet_max_chars (struct ui_file
*file
, int from_tty
,
1818 struct cmd_list_element
*c
,
1821 fprintf_filtered (file
, _("Number of remote packet characters to "
1822 "display is %s.\n"), value
);
1826 remote_target::get_memory_write_packet_size ()
1828 return get_memory_packet_size (&memory_write_packet_config
);
1831 /* FIXME: needs to be per-remote-target. */
1832 static struct memory_packet_config memory_read_packet_config
=
1834 "memory-read-packet-size",
1838 set_memory_read_packet_size (const char *args
, int from_tty
)
1840 set_memory_packet_size (args
, &memory_read_packet_config
);
1844 show_memory_read_packet_size (const char *args
, int from_tty
)
1846 show_memory_packet_size (&memory_read_packet_config
);
1850 remote_target::get_memory_read_packet_size ()
1852 long size
= get_memory_packet_size (&memory_read_packet_config
);
1854 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1855 extra buffer size argument before the memory read size can be
1856 increased beyond this. */
1857 if (size
> get_remote_packet_size ())
1858 size
= get_remote_packet_size ();
1864 struct packet_config
1869 /* If auto, GDB auto-detects support for this packet or feature,
1870 either through qSupported, or by trying the packet and looking
1871 at the response. If true, GDB assumes the target supports this
1872 packet. If false, the packet is disabled. Configs that don't
1873 have an associated command always have this set to auto. */
1874 enum auto_boolean detect
;
1876 /* The "show remote foo-packet" command created for this packet. */
1877 cmd_list_element
*show_cmd
;
1879 /* Does the target support this packet? */
1880 enum packet_support support
;
1883 static enum packet_support
packet_config_support (struct packet_config
*config
);
1884 static enum packet_support
packet_support (int packet
);
1887 show_packet_config_cmd (struct packet_config
*config
)
1889 const char *support
= "internal-error";
1891 switch (packet_config_support (config
))
1894 support
= "enabled";
1896 case PACKET_DISABLE
:
1897 support
= "disabled";
1899 case PACKET_SUPPORT_UNKNOWN
:
1900 support
= "unknown";
1903 switch (config
->detect
)
1905 case AUTO_BOOLEAN_AUTO
:
1906 printf_filtered (_("Support for the `%s' packet "
1907 "is auto-detected, currently %s.\n"),
1908 config
->name
, support
);
1910 case AUTO_BOOLEAN_TRUE
:
1911 case AUTO_BOOLEAN_FALSE
:
1912 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1913 config
->name
, support
);
1919 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1920 const char *title
, int legacy
)
1922 config
->name
= name
;
1923 config
->title
= title
;
1924 gdb::unique_xmalloc_ptr
<char> set_doc
1925 = xstrprintf ("Set use of remote protocol `%s' (%s) packet.",
1927 gdb::unique_xmalloc_ptr
<char> show_doc
1928 = xstrprintf ("Show current use of remote protocol `%s' (%s) packet.",
1930 /* set/show TITLE-packet {auto,on,off} */
1931 gdb::unique_xmalloc_ptr
<char> cmd_name
= xstrprintf ("%s-packet", title
);
1932 set_show_commands cmds
1933 = add_setshow_auto_boolean_cmd (cmd_name
.release (), class_obscure
,
1934 &config
->detect
, set_doc
.get (),
1935 show_doc
.get (), NULL
, /* help_doc */
1937 show_remote_protocol_packet_cmd
,
1938 &remote_set_cmdlist
, &remote_show_cmdlist
);
1939 config
->show_cmd
= cmds
.show
;
1941 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1944 /* It's not clear who should take ownership of this string, so, for
1945 now, make it static, and give copies to each of the add_alias_cmd
1947 static gdb::unique_xmalloc_ptr
<char> legacy_name
1948 = xstrprintf ("%s-packet", name
);
1949 add_alias_cmd (legacy_name
.get (), cmds
.set
, class_obscure
, 0,
1950 &remote_set_cmdlist
);
1951 add_alias_cmd (legacy_name
.get (), cmds
.show
, class_obscure
, 0,
1952 &remote_show_cmdlist
);
1956 static enum packet_result
1957 packet_check_result (const char *buf
)
1961 /* The stub recognized the packet request. Check that the
1962 operation succeeded. */
1964 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1966 /* "Enn" - definitely an error. */
1967 return PACKET_ERROR
;
1969 /* Always treat "E." as an error. This will be used for
1970 more verbose error messages, such as E.memtypes. */
1971 if (buf
[0] == 'E' && buf
[1] == '.')
1972 return PACKET_ERROR
;
1974 /* The packet may or may not be OK. Just assume it is. */
1978 /* The stub does not support the packet. */
1979 return PACKET_UNKNOWN
;
1982 static enum packet_result
1983 packet_check_result (const gdb::char_vector
&buf
)
1985 return packet_check_result (buf
.data ());
1988 static enum packet_result
1989 packet_ok (const char *buf
, struct packet_config
*config
)
1991 enum packet_result result
;
1993 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1994 && config
->support
== PACKET_DISABLE
)
1995 internal_error (__FILE__
, __LINE__
,
1996 _("packet_ok: attempt to use a disabled packet"));
1998 result
= packet_check_result (buf
);
2003 /* The stub recognized the packet request. */
2004 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
2006 remote_debug_printf ("Packet %s (%s) is supported",
2007 config
->name
, config
->title
);
2008 config
->support
= PACKET_ENABLE
;
2011 case PACKET_UNKNOWN
:
2012 /* The stub does not support the packet. */
2013 if (config
->detect
== AUTO_BOOLEAN_AUTO
2014 && config
->support
== PACKET_ENABLE
)
2016 /* If the stub previously indicated that the packet was
2017 supported then there is a protocol error. */
2018 error (_("Protocol error: %s (%s) conflicting enabled responses."),
2019 config
->name
, config
->title
);
2021 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
2023 /* The user set it wrong. */
2024 error (_("Enabled packet %s (%s) not recognized by stub"),
2025 config
->name
, config
->title
);
2028 remote_debug_printf ("Packet %s (%s) is NOT supported",
2029 config
->name
, config
->title
);
2030 config
->support
= PACKET_DISABLE
;
2037 static enum packet_result
2038 packet_ok (const gdb::char_vector
&buf
, struct packet_config
*config
)
2040 return packet_ok (buf
.data (), config
);
2057 PACKET_vFile_pwrite
,
2059 PACKET_vFile_unlink
,
2060 PACKET_vFile_readlink
,
2063 PACKET_qXfer_features
,
2064 PACKET_qXfer_exec_file
,
2065 PACKET_qXfer_libraries
,
2066 PACKET_qXfer_libraries_svr4
,
2067 PACKET_qXfer_memory_map
,
2068 PACKET_qXfer_osdata
,
2069 PACKET_qXfer_threads
,
2070 PACKET_qXfer_statictrace_read
,
2071 PACKET_qXfer_traceframe_info
,
2077 PACKET_QPassSignals
,
2078 PACKET_QCatchSyscalls
,
2079 PACKET_QProgramSignals
,
2080 PACKET_QSetWorkingDir
,
2081 PACKET_QStartupWithShell
,
2082 PACKET_QEnvironmentHexEncoded
,
2083 PACKET_QEnvironmentReset
,
2084 PACKET_QEnvironmentUnset
,
2086 PACKET_qSearch_memory
,
2089 PACKET_QStartNoAckMode
,
2091 PACKET_qXfer_siginfo_read
,
2092 PACKET_qXfer_siginfo_write
,
2095 /* Support for conditional tracepoints. */
2096 PACKET_ConditionalTracepoints
,
2098 /* Support for target-side breakpoint conditions. */
2099 PACKET_ConditionalBreakpoints
,
2101 /* Support for target-side breakpoint commands. */
2102 PACKET_BreakpointCommands
,
2104 /* Support for fast tracepoints. */
2105 PACKET_FastTracepoints
,
2107 /* Support for static tracepoints. */
2108 PACKET_StaticTracepoints
,
2110 /* Support for installing tracepoints while a trace experiment is
2112 PACKET_InstallInTrace
,
2116 PACKET_TracepointSource
,
2119 PACKET_QDisableRandomization
,
2121 PACKET_QTBuffer_size
,
2125 PACKET_qXfer_btrace
,
2127 /* Support for the QNonStop packet. */
2130 /* Support for the QThreadEvents packet. */
2131 PACKET_QThreadEvents
,
2133 /* Support for multi-process extensions. */
2134 PACKET_multiprocess_feature
,
2136 /* Support for enabling and disabling tracepoints while a trace
2137 experiment is running. */
2138 PACKET_EnableDisableTracepoints_feature
,
2140 /* Support for collecting strings using the tracenz bytecode. */
2141 PACKET_tracenz_feature
,
2143 /* Support for continuing to run a trace experiment while GDB is
2145 PACKET_DisconnectedTracing_feature
,
2147 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2148 PACKET_augmented_libraries_svr4_read_feature
,
2150 /* Support for the qXfer:btrace-conf:read packet. */
2151 PACKET_qXfer_btrace_conf
,
2153 /* Support for the Qbtrace-conf:bts:size packet. */
2154 PACKET_Qbtrace_conf_bts_size
,
2156 /* Support for swbreak+ feature. */
2157 PACKET_swbreak_feature
,
2159 /* Support for hwbreak+ feature. */
2160 PACKET_hwbreak_feature
,
2162 /* Support for fork events. */
2163 PACKET_fork_event_feature
,
2165 /* Support for vfork events. */
2166 PACKET_vfork_event_feature
,
2168 /* Support for the Qbtrace-conf:pt:size packet. */
2169 PACKET_Qbtrace_conf_pt_size
,
2171 /* Support for exec events. */
2172 PACKET_exec_event_feature
,
2174 /* Support for query supported vCont actions. */
2175 PACKET_vContSupported
,
2177 /* Support remote CTRL-C. */
2180 /* Support TARGET_WAITKIND_NO_RESUMED. */
2183 /* Support for memory tagging, allocation tag fetch/store
2184 packets and the tag violation stop replies. */
2185 PACKET_memory_tagging_feature
,
2190 /* FIXME: needs to be per-remote-target. Ignoring this for now,
2191 assuming all remote targets are the same server (thus all support
2192 the same packets). */
2193 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
2195 /* Returns the packet's corresponding "set remote foo-packet" command
2196 state. See struct packet_config for more details. */
2198 static enum auto_boolean
2199 packet_set_cmd_state (int packet
)
2201 return remote_protocol_packets
[packet
].detect
;
2204 /* Returns whether a given packet or feature is supported. This takes
2205 into account the state of the corresponding "set remote foo-packet"
2206 command, which may be used to bypass auto-detection. */
2208 static enum packet_support
2209 packet_config_support (struct packet_config
*config
)
2211 switch (config
->detect
)
2213 case AUTO_BOOLEAN_TRUE
:
2214 return PACKET_ENABLE
;
2215 case AUTO_BOOLEAN_FALSE
:
2216 return PACKET_DISABLE
;
2217 case AUTO_BOOLEAN_AUTO
:
2218 return config
->support
;
2220 gdb_assert_not_reached (_("bad switch"));
2224 /* Same as packet_config_support, but takes the packet's enum value as
2227 static enum packet_support
2228 packet_support (int packet
)
2230 struct packet_config
*config
= &remote_protocol_packets
[packet
];
2232 return packet_config_support (config
);
2236 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
2237 struct cmd_list_element
*c
,
2240 struct packet_config
*packet
;
2241 gdb_assert (c
->var
.has_value ());
2243 for (packet
= remote_protocol_packets
;
2244 packet
< &remote_protocol_packets
[PACKET_MAX
];
2247 if (c
== packet
->show_cmd
)
2249 show_packet_config_cmd (packet
);
2253 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
2257 /* Should we try one of the 'Z' requests? */
2261 Z_PACKET_SOFTWARE_BP
,
2262 Z_PACKET_HARDWARE_BP
,
2269 /* For compatibility with older distributions. Provide a ``set remote
2270 Z-packet ...'' command that updates all the Z packet types. */
2272 static enum auto_boolean remote_Z_packet_detect
;
2275 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
2276 struct cmd_list_element
*c
)
2280 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2281 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
2285 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
2286 struct cmd_list_element
*c
,
2291 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2293 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
2297 /* Returns true if the multi-process extensions are in effect. */
2300 remote_multi_process_p (struct remote_state
*rs
)
2302 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
2305 /* Returns true if fork events are supported. */
2308 remote_fork_event_p (struct remote_state
*rs
)
2310 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
2313 /* Returns true if vfork events are supported. */
2316 remote_vfork_event_p (struct remote_state
*rs
)
2318 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
2321 /* Returns true if exec events are supported. */
2324 remote_exec_event_p (struct remote_state
*rs
)
2326 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
2329 /* Returns true if memory tagging is supported, false otherwise. */
2332 remote_memory_tagging_p ()
2334 return packet_support (PACKET_memory_tagging_feature
) == PACKET_ENABLE
;
2337 /* Insert fork catchpoint target routine. If fork events are enabled
2338 then return success, nothing more to do. */
2341 remote_target::insert_fork_catchpoint (int pid
)
2343 struct remote_state
*rs
= get_remote_state ();
2345 return !remote_fork_event_p (rs
);
2348 /* Remove fork catchpoint target routine. Nothing to do, just
2352 remote_target::remove_fork_catchpoint (int pid
)
2357 /* Insert vfork catchpoint target routine. If vfork events are enabled
2358 then return success, nothing more to do. */
2361 remote_target::insert_vfork_catchpoint (int pid
)
2363 struct remote_state
*rs
= get_remote_state ();
2365 return !remote_vfork_event_p (rs
);
2368 /* Remove vfork catchpoint target routine. Nothing to do, just
2372 remote_target::remove_vfork_catchpoint (int pid
)
2377 /* Insert exec catchpoint target routine. If exec events are
2378 enabled, just return success. */
2381 remote_target::insert_exec_catchpoint (int pid
)
2383 struct remote_state
*rs
= get_remote_state ();
2385 return !remote_exec_event_p (rs
);
2388 /* Remove exec catchpoint target routine. Nothing to do, just
2392 remote_target::remove_exec_catchpoint (int pid
)
2399 /* Take advantage of the fact that the TID field is not used, to tag
2400 special ptids with it set to != 0. */
2401 static const ptid_t
magic_null_ptid (42000, -1, 1);
2402 static const ptid_t
not_sent_ptid (42000, -2, 1);
2403 static const ptid_t
any_thread_ptid (42000, 0, 1);
2405 /* Find out if the stub attached to PID (and hence GDB should offer to
2406 detach instead of killing it when bailing out). */
2409 remote_target::remote_query_attached (int pid
)
2411 struct remote_state
*rs
= get_remote_state ();
2412 size_t size
= get_remote_packet_size ();
2414 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
2417 if (remote_multi_process_p (rs
))
2418 xsnprintf (rs
->buf
.data (), size
, "qAttached:%x", pid
);
2420 xsnprintf (rs
->buf
.data (), size
, "qAttached");
2423 getpkt (&rs
->buf
, 0);
2425 switch (packet_ok (rs
->buf
,
2426 &remote_protocol_packets
[PACKET_qAttached
]))
2429 if (strcmp (rs
->buf
.data (), "1") == 0)
2433 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
2435 case PACKET_UNKNOWN
:
2442 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2443 has been invented by GDB, instead of reported by the target. Since
2444 we can be connected to a remote system before before knowing about
2445 any inferior, mark the target with execution when we find the first
2446 inferior. If ATTACHED is 1, then we had just attached to this
2447 inferior. If it is 0, then we just created this inferior. If it
2448 is -1, then try querying the remote stub to find out if it had
2449 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2450 attempt to open this inferior's executable as the main executable
2451 if no main executable is open already. */
2454 remote_target::remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
2457 struct inferior
*inf
;
2459 /* Check whether this process we're learning about is to be
2460 considered attached, or if is to be considered to have been
2461 spawned by the stub. */
2463 attached
= remote_query_attached (pid
);
2465 if (gdbarch_has_global_solist (target_gdbarch ()))
2467 /* If the target shares code across all inferiors, then every
2468 attach adds a new inferior. */
2469 inf
= add_inferior (pid
);
2471 /* ... and every inferior is bound to the same program space.
2472 However, each inferior may still have its own address
2474 inf
->aspace
= maybe_new_address_space ();
2475 inf
->pspace
= current_program_space
;
2479 /* In the traditional debugging scenario, there's a 1-1 match
2480 between program/address spaces. We simply bind the inferior
2481 to the program space's address space. */
2482 inf
= current_inferior ();
2484 /* However, if the current inferior is already bound to a
2485 process, find some other empty inferior. */
2489 for (inferior
*it
: all_inferiors ())
2498 /* Since all inferiors were already bound to a process, add
2500 inf
= add_inferior_with_spaces ();
2502 switch_to_inferior_no_thread (inf
);
2503 inf
->push_target (this);
2504 inferior_appeared (inf
, pid
);
2507 inf
->attach_flag
= attached
;
2508 inf
->fake_pid_p
= fake_pid_p
;
2510 /* If no main executable is currently open then attempt to
2511 open the file that was executed to create this inferior. */
2512 if (try_open_exec
&& get_exec_file (0) == NULL
)
2513 exec_file_locate_attach (pid
, 0, 1);
2515 /* Check for exec file mismatch, and let the user solve it. */
2516 validate_exec_file (1);
2521 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
2522 static remote_thread_info
*get_remote_thread_info (remote_target
*target
,
2525 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2526 according to RUNNING. */
2529 remote_target::remote_add_thread (ptid_t ptid
, bool running
, bool executing
)
2531 struct remote_state
*rs
= get_remote_state ();
2532 struct thread_info
*thread
;
2534 /* GDB historically didn't pull threads in the initial connection
2535 setup. If the remote target doesn't even have a concept of
2536 threads (e.g., a bare-metal target), even if internally we
2537 consider that a single-threaded target, mentioning a new thread
2538 might be confusing to the user. Be silent then, preserving the
2539 age old behavior. */
2540 if (rs
->starting_up
)
2541 thread
= add_thread_silent (this, ptid
);
2543 thread
= add_thread (this, ptid
);
2545 /* We start by assuming threads are resumed. That state then gets updated
2546 when we process a matching stop reply. */
2547 get_remote_thread_info (thread
)->set_resumed ();
2549 set_executing (this, ptid
, executing
);
2550 set_running (this, ptid
, running
);
2555 /* Come here when we learn about a thread id from the remote target.
2556 It may be the first time we hear about such thread, so take the
2557 opportunity to add it to GDB's thread list. In case this is the
2558 first time we're noticing its corresponding inferior, add it to
2559 GDB's inferior list as well. EXECUTING indicates whether the
2560 thread is (internally) executing or stopped. */
2563 remote_target::remote_notice_new_inferior (ptid_t currthread
, bool executing
)
2565 /* In non-stop mode, we assume new found threads are (externally)
2566 running until proven otherwise with a stop reply. In all-stop,
2567 we can only get here if all threads are stopped. */
2568 bool running
= target_is_non_stop_p ();
2570 /* If this is a new thread, add it to GDB's thread list.
2571 If we leave it up to WFI to do this, bad things will happen. */
2573 thread_info
*tp
= find_thread_ptid (this, currthread
);
2574 if (tp
!= NULL
&& tp
->state
== THREAD_EXITED
)
2576 /* We're seeing an event on a thread id we knew had exited.
2577 This has to be a new thread reusing the old id. Add it. */
2578 remote_add_thread (currthread
, running
, executing
);
2582 if (!in_thread_list (this, currthread
))
2584 struct inferior
*inf
= NULL
;
2585 int pid
= currthread
.pid ();
2587 if (inferior_ptid
.is_pid ()
2588 && pid
== inferior_ptid
.pid ())
2590 /* inferior_ptid has no thread member yet. This can happen
2591 with the vAttach -> remote_wait,"TAAthread:" path if the
2592 stub doesn't support qC. This is the first stop reported
2593 after an attach, so this is the main thread. Update the
2594 ptid in the thread list. */
2595 if (in_thread_list (this, ptid_t (pid
)))
2596 thread_change_ptid (this, inferior_ptid
, currthread
);
2600 = remote_add_thread (currthread
, running
, executing
);
2601 switch_to_thread (thr
);
2606 if (magic_null_ptid
== inferior_ptid
)
2608 /* inferior_ptid is not set yet. This can happen with the
2609 vRun -> remote_wait,"TAAthread:" path if the stub
2610 doesn't support qC. This is the first stop reported
2611 after an attach, so this is the main thread. Update the
2612 ptid in the thread list. */
2613 thread_change_ptid (this, inferior_ptid
, currthread
);
2617 /* When connecting to a target remote, or to a target
2618 extended-remote which already was debugging an inferior, we
2619 may not know about it yet. Add it before adding its child
2620 thread, so notifications are emitted in a sensible order. */
2621 if (find_inferior_pid (this, currthread
.pid ()) == NULL
)
2623 struct remote_state
*rs
= get_remote_state ();
2624 bool fake_pid_p
= !remote_multi_process_p (rs
);
2626 inf
= remote_add_inferior (fake_pid_p
,
2627 currthread
.pid (), -1, 1);
2630 /* This is really a new thread. Add it. */
2631 thread_info
*new_thr
2632 = remote_add_thread (currthread
, running
, executing
);
2634 /* If we found a new inferior, let the common code do whatever
2635 it needs to with it (e.g., read shared libraries, insert
2636 breakpoints), unless we're just setting up an all-stop
2640 struct remote_state
*rs
= get_remote_state ();
2642 if (!rs
->starting_up
)
2643 notice_new_inferior (new_thr
, executing
, 0);
2648 /* Return THREAD's private thread data, creating it if necessary. */
2650 static remote_thread_info
*
2651 get_remote_thread_info (thread_info
*thread
)
2653 gdb_assert (thread
!= NULL
);
2655 if (thread
->priv
== NULL
)
2656 thread
->priv
.reset (new remote_thread_info
);
2658 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
2661 /* Return PTID's private thread data, creating it if necessary. */
2663 static remote_thread_info
*
2664 get_remote_thread_info (remote_target
*target
, ptid_t ptid
)
2666 thread_info
*thr
= find_thread_ptid (target
, ptid
);
2667 return get_remote_thread_info (thr
);
2670 /* Call this function as a result of
2671 1) A halt indication (T packet) containing a thread id
2672 2) A direct query of currthread
2673 3) Successful execution of set thread */
2676 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2678 rs
->general_thread
= currthread
;
2681 /* If 'QPassSignals' is supported, tell the remote stub what signals
2682 it can simply pass through to the inferior without reporting. */
2685 remote_target::pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2687 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2689 char *pass_packet
, *p
;
2691 struct remote_state
*rs
= get_remote_state ();
2693 gdb_assert (pass_signals
.size () < 256);
2694 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2696 if (pass_signals
[i
])
2699 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2700 strcpy (pass_packet
, "QPassSignals:");
2701 p
= pass_packet
+ strlen (pass_packet
);
2702 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2704 if (pass_signals
[i
])
2707 *p
++ = tohex (i
>> 4);
2708 *p
++ = tohex (i
& 15);
2717 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2719 putpkt (pass_packet
);
2720 getpkt (&rs
->buf
, 0);
2721 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2722 xfree (rs
->last_pass_packet
);
2723 rs
->last_pass_packet
= pass_packet
;
2726 xfree (pass_packet
);
2730 /* If 'QCatchSyscalls' is supported, tell the remote stub
2731 to report syscalls to GDB. */
2734 remote_target::set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
2735 gdb::array_view
<const int> syscall_counts
)
2737 const char *catch_packet
;
2738 enum packet_result result
;
2741 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2743 /* Not supported. */
2747 if (needed
&& any_count
== 0)
2749 /* Count how many syscalls are to be caught. */
2750 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2752 if (syscall_counts
[i
] != 0)
2757 remote_debug_printf ("pid %d needed %d any_count %d n_sysno %d",
2758 pid
, needed
, any_count
, n_sysno
);
2760 std::string built_packet
;
2763 /* Prepare a packet with the sysno list, assuming max 8+1
2764 characters for a sysno. If the resulting packet size is too
2765 big, fallback on the non-selective packet. */
2766 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2767 built_packet
.reserve (maxpktsz
);
2768 built_packet
= "QCatchSyscalls:1";
2771 /* Add in each syscall to be caught. */
2772 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2774 if (syscall_counts
[i
] != 0)
2775 string_appendf (built_packet
, ";%zx", i
);
2778 if (built_packet
.size () > get_remote_packet_size ())
2780 /* catch_packet too big. Fallback to less efficient
2781 non selective mode, with GDB doing the filtering. */
2782 catch_packet
= "QCatchSyscalls:1";
2785 catch_packet
= built_packet
.c_str ();
2788 catch_packet
= "QCatchSyscalls:0";
2790 struct remote_state
*rs
= get_remote_state ();
2792 putpkt (catch_packet
);
2793 getpkt (&rs
->buf
, 0);
2794 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2795 if (result
== PACKET_OK
)
2801 /* If 'QProgramSignals' is supported, tell the remote stub what
2802 signals it should pass through to the inferior when detaching. */
2805 remote_target::program_signals (gdb::array_view
<const unsigned char> signals
)
2807 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2811 struct remote_state
*rs
= get_remote_state ();
2813 gdb_assert (signals
.size () < 256);
2814 for (size_t i
= 0; i
< signals
.size (); i
++)
2819 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2820 strcpy (packet
, "QProgramSignals:");
2821 p
= packet
+ strlen (packet
);
2822 for (size_t i
= 0; i
< signals
.size (); i
++)
2824 if (signal_pass_state (i
))
2827 *p
++ = tohex (i
>> 4);
2828 *p
++ = tohex (i
& 15);
2837 if (!rs
->last_program_signals_packet
2838 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2841 getpkt (&rs
->buf
, 0);
2842 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2843 xfree (rs
->last_program_signals_packet
);
2844 rs
->last_program_signals_packet
= packet
;
2851 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2852 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2853 thread. If GEN is set, set the general thread, if not, then set
2854 the step/continue thread. */
2856 remote_target::set_thread (ptid_t ptid
, int gen
)
2858 struct remote_state
*rs
= get_remote_state ();
2859 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2860 char *buf
= rs
->buf
.data ();
2861 char *endbuf
= buf
+ get_remote_packet_size ();
2867 *buf
++ = gen
? 'g' : 'c';
2868 if (ptid
== magic_null_ptid
)
2869 xsnprintf (buf
, endbuf
- buf
, "0");
2870 else if (ptid
== any_thread_ptid
)
2871 xsnprintf (buf
, endbuf
- buf
, "0");
2872 else if (ptid
== minus_one_ptid
)
2873 xsnprintf (buf
, endbuf
- buf
, "-1");
2875 write_ptid (buf
, endbuf
, ptid
);
2877 getpkt (&rs
->buf
, 0);
2879 rs
->general_thread
= ptid
;
2881 rs
->continue_thread
= ptid
;
2885 remote_target::set_general_thread (ptid_t ptid
)
2887 set_thread (ptid
, 1);
2891 remote_target::set_continue_thread (ptid_t ptid
)
2893 set_thread (ptid
, 0);
2896 /* Change the remote current process. Which thread within the process
2897 ends up selected isn't important, as long as it is the same process
2898 as what INFERIOR_PTID points to.
2900 This comes from that fact that there is no explicit notion of
2901 "selected process" in the protocol. The selected process for
2902 general operations is the process the selected general thread
2906 remote_target::set_general_process ()
2908 struct remote_state
*rs
= get_remote_state ();
2910 /* If the remote can't handle multiple processes, don't bother. */
2911 if (!remote_multi_process_p (rs
))
2914 /* We only need to change the remote current thread if it's pointing
2915 at some other process. */
2916 if (rs
->general_thread
.pid () != inferior_ptid
.pid ())
2917 set_general_thread (inferior_ptid
);
2921 /* Return nonzero if this is the main thread that we made up ourselves
2922 to model non-threaded targets as single-threaded. */
2925 remote_thread_always_alive (ptid_t ptid
)
2927 if (ptid
== magic_null_ptid
)
2928 /* The main thread is always alive. */
2931 if (ptid
.pid () != 0 && ptid
.lwp () == 0)
2932 /* The main thread is always alive. This can happen after a
2933 vAttach, if the remote side doesn't support
2940 /* Return nonzero if the thread PTID is still alive on the remote
2944 remote_target::thread_alive (ptid_t ptid
)
2946 struct remote_state
*rs
= get_remote_state ();
2949 /* Check if this is a thread that we made up ourselves to model
2950 non-threaded targets as single-threaded. */
2951 if (remote_thread_always_alive (ptid
))
2954 p
= rs
->buf
.data ();
2955 endp
= p
+ get_remote_packet_size ();
2958 write_ptid (p
, endp
, ptid
);
2961 getpkt (&rs
->buf
, 0);
2962 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2965 /* Return a pointer to a thread name if we know it and NULL otherwise.
2966 The thread_info object owns the memory for the name. */
2969 remote_target::thread_name (struct thread_info
*info
)
2971 if (info
->priv
!= NULL
)
2973 const std::string
&name
= get_remote_thread_info (info
)->name
;
2974 return !name
.empty () ? name
.c_str () : NULL
;
2980 /* About these extended threadlist and threadinfo packets. They are
2981 variable length packets but, the fields within them are often fixed
2982 length. They are redundant enough to send over UDP as is the
2983 remote protocol in general. There is a matching unit test module
2986 /* WARNING: This threadref data structure comes from the remote O.S.,
2987 libstub protocol encoding, and remote.c. It is not particularly
2990 /* Right now, the internal structure is int. We want it to be bigger.
2991 Plan to fix this. */
2993 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2995 /* gdb_ext_thread_info is an internal GDB data structure which is
2996 equivalent to the reply of the remote threadinfo packet. */
2998 struct gdb_ext_thread_info
3000 threadref threadid
; /* External form of thread reference. */
3001 int active
; /* Has state interesting to GDB?
3003 char display
[256]; /* Brief state display, name,
3004 blocked/suspended. */
3005 char shortname
[32]; /* To be used to name threads. */
3006 char more_display
[256]; /* Long info, statistics, queue depth,
3010 /* The volume of remote transfers can be limited by submitting
3011 a mask containing bits specifying the desired information.
3012 Use a union of these values as the 'selection' parameter to
3013 get_thread_info. FIXME: Make these TAG names more thread specific. */
3015 #define TAG_THREADID 1
3016 #define TAG_EXISTS 2
3017 #define TAG_DISPLAY 4
3018 #define TAG_THREADNAME 8
3019 #define TAG_MOREDISPLAY 16
3021 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
3023 static const char *unpack_nibble (const char *buf
, int *val
);
3025 static const char *unpack_byte (const char *buf
, int *value
);
3027 static char *pack_int (char *buf
, int value
);
3029 static const char *unpack_int (const char *buf
, int *value
);
3031 static const char *unpack_string (const char *src
, char *dest
, int length
);
3033 static char *pack_threadid (char *pkt
, threadref
*id
);
3035 static const char *unpack_threadid (const char *inbuf
, threadref
*id
);
3037 void int_to_threadref (threadref
*id
, int value
);
3039 static int threadref_to_int (threadref
*ref
);
3041 static void copy_threadref (threadref
*dest
, threadref
*src
);
3043 static int threadmatch (threadref
*dest
, threadref
*src
);
3045 static char *pack_threadinfo_request (char *pkt
, int mode
,
3048 static char *pack_threadlist_request (char *pkt
, int startflag
,
3050 threadref
*nextthread
);
3052 static int remote_newthread_step (threadref
*ref
, void *context
);
3055 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
3056 buffer we're allowed to write to. Returns
3057 BUF+CHARACTERS_WRITTEN. */
3060 remote_target::write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
3063 struct remote_state
*rs
= get_remote_state ();
3065 if (remote_multi_process_p (rs
))
3069 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
3071 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
3075 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
3077 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
3082 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
3083 last parsed char. Returns null_ptid if no thread id is found, and
3084 throws an error if the thread id has an invalid format. */
3087 read_ptid (const char *buf
, const char **obuf
)
3089 const char *p
= buf
;
3091 ULONGEST pid
= 0, tid
= 0;
3095 /* Multi-process ptid. */
3096 pp
= unpack_varlen_hex (p
+ 1, &pid
);
3098 error (_("invalid remote ptid: %s"), p
);
3101 pp
= unpack_varlen_hex (p
+ 1, &tid
);
3104 return ptid_t (pid
, tid
);
3107 /* No multi-process. Just a tid. */
3108 pp
= unpack_varlen_hex (p
, &tid
);
3110 /* Return null_ptid when no thread id is found. */
3118 /* Since the stub is not sending a process id, then default to
3119 what's in inferior_ptid, unless it's null at this point. If so,
3120 then since there's no way to know the pid of the reported
3121 threads, use the magic number. */
3122 if (inferior_ptid
== null_ptid
)
3123 pid
= magic_null_ptid
.pid ();
3125 pid
= inferior_ptid
.pid ();
3129 return ptid_t (pid
, tid
);
3135 if (ch
>= 'a' && ch
<= 'f')
3136 return ch
- 'a' + 10;
3137 if (ch
>= '0' && ch
<= '9')
3139 if (ch
>= 'A' && ch
<= 'F')
3140 return ch
- 'A' + 10;
3145 stub_unpack_int (const char *buff
, int fieldlength
)
3152 nibble
= stubhex (*buff
++);
3156 retval
= retval
<< 4;
3162 unpack_nibble (const char *buf
, int *val
)
3164 *val
= fromhex (*buf
++);
3169 unpack_byte (const char *buf
, int *value
)
3171 *value
= stub_unpack_int (buf
, 2);
3176 pack_int (char *buf
, int value
)
3178 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
3179 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
3180 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
3181 buf
= pack_hex_byte (buf
, (value
& 0xff));
3186 unpack_int (const char *buf
, int *value
)
3188 *value
= stub_unpack_int (buf
, 8);
3192 #if 0 /* Currently unused, uncomment when needed. */
3193 static char *pack_string (char *pkt
, char *string
);
3196 pack_string (char *pkt
, char *string
)
3201 len
= strlen (string
);
3203 len
= 200; /* Bigger than most GDB packets, junk??? */
3204 pkt
= pack_hex_byte (pkt
, len
);
3208 if ((ch
== '\0') || (ch
== '#'))
3209 ch
= '*'; /* Protect encapsulation. */
3214 #endif /* 0 (unused) */
3217 unpack_string (const char *src
, char *dest
, int length
)
3226 pack_threadid (char *pkt
, threadref
*id
)
3229 unsigned char *altid
;
3231 altid
= (unsigned char *) id
;
3232 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
3234 pkt
= pack_hex_byte (pkt
, *altid
++);
3240 unpack_threadid (const char *inbuf
, threadref
*id
)
3243 const char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
3246 altref
= (char *) id
;
3248 while (inbuf
< limit
)
3250 x
= stubhex (*inbuf
++);
3251 y
= stubhex (*inbuf
++);
3252 *altref
++ = (x
<< 4) | y
;
3257 /* Externally, threadrefs are 64 bits but internally, they are still
3258 ints. This is due to a mismatch of specifications. We would like
3259 to use 64bit thread references internally. This is an adapter
3263 int_to_threadref (threadref
*id
, int value
)
3265 unsigned char *scan
;
3267 scan
= (unsigned char *) id
;
3273 *scan
++ = (value
>> 24) & 0xff;
3274 *scan
++ = (value
>> 16) & 0xff;
3275 *scan
++ = (value
>> 8) & 0xff;
3276 *scan
++ = (value
& 0xff);
3280 threadref_to_int (threadref
*ref
)
3283 unsigned char *scan
;
3289 value
= (value
<< 8) | ((*scan
++) & 0xff);
3294 copy_threadref (threadref
*dest
, threadref
*src
)
3297 unsigned char *csrc
, *cdest
;
3299 csrc
= (unsigned char *) src
;
3300 cdest
= (unsigned char *) dest
;
3307 threadmatch (threadref
*dest
, threadref
*src
)
3309 /* Things are broken right now, so just assume we got a match. */
3311 unsigned char *srcp
, *destp
;
3313 srcp
= (char *) src
;
3314 destp
= (char *) dest
;
3318 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
3325 threadid:1, # always request threadid
3332 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3335 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
3337 *pkt
++ = 'q'; /* Info Query */
3338 *pkt
++ = 'P'; /* process or thread info */
3339 pkt
= pack_int (pkt
, mode
); /* mode */
3340 pkt
= pack_threadid (pkt
, id
); /* threadid */
3341 *pkt
= '\0'; /* terminate */
3345 /* These values tag the fields in a thread info response packet. */
3346 /* Tagging the fields allows us to request specific fields and to
3347 add more fields as time goes by. */
3349 #define TAG_THREADID 1 /* Echo the thread identifier. */
3350 #define TAG_EXISTS 2 /* Is this process defined enough to
3351 fetch registers and its stack? */
3352 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3353 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3354 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3358 remote_target::remote_unpack_thread_info_response (const char *pkt
,
3359 threadref
*expectedref
,
3360 gdb_ext_thread_info
*info
)
3362 struct remote_state
*rs
= get_remote_state ();
3366 const char *limit
= pkt
+ rs
->buf
.size (); /* Plausible parsing limit. */
3369 /* info->threadid = 0; FIXME: implement zero_threadref. */
3371 info
->display
[0] = '\0';
3372 info
->shortname
[0] = '\0';
3373 info
->more_display
[0] = '\0';
3375 /* Assume the characters indicating the packet type have been
3377 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
3378 pkt
= unpack_threadid (pkt
, &ref
);
3381 warning (_("Incomplete response to threadinfo request."));
3382 if (!threadmatch (&ref
, expectedref
))
3383 { /* This is an answer to a different request. */
3384 warning (_("ERROR RMT Thread info mismatch."));
3387 copy_threadref (&info
->threadid
, &ref
);
3389 /* Loop on tagged fields , try to bail if something goes wrong. */
3391 /* Packets are terminated with nulls. */
3392 while ((pkt
< limit
) && mask
&& *pkt
)
3394 pkt
= unpack_int (pkt
, &tag
); /* tag */
3395 pkt
= unpack_byte (pkt
, &length
); /* length */
3396 if (!(tag
& mask
)) /* Tags out of synch with mask. */
3398 warning (_("ERROR RMT: threadinfo tag mismatch."));
3402 if (tag
== TAG_THREADID
)
3406 warning (_("ERROR RMT: length of threadid is not 16."));
3410 pkt
= unpack_threadid (pkt
, &ref
);
3411 mask
= mask
& ~TAG_THREADID
;
3414 if (tag
== TAG_EXISTS
)
3416 info
->active
= stub_unpack_int (pkt
, length
);
3418 mask
= mask
& ~(TAG_EXISTS
);
3421 warning (_("ERROR RMT: 'exists' length too long."));
3427 if (tag
== TAG_THREADNAME
)
3429 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
3430 mask
= mask
& ~TAG_THREADNAME
;
3433 if (tag
== TAG_DISPLAY
)
3435 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
3436 mask
= mask
& ~TAG_DISPLAY
;
3439 if (tag
== TAG_MOREDISPLAY
)
3441 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
3442 mask
= mask
& ~TAG_MOREDISPLAY
;
3445 warning (_("ERROR RMT: unknown thread info tag."));
3446 break; /* Not a tag we know about. */
3452 remote_target::remote_get_threadinfo (threadref
*threadid
,
3454 gdb_ext_thread_info
*info
)
3456 struct remote_state
*rs
= get_remote_state ();
3459 pack_threadinfo_request (rs
->buf
.data (), fieldset
, threadid
);
3461 getpkt (&rs
->buf
, 0);
3463 if (rs
->buf
[0] == '\0')
3466 result
= remote_unpack_thread_info_response (&rs
->buf
[2],
3471 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3474 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
3475 threadref
*nextthread
)
3477 *pkt
++ = 'q'; /* info query packet */
3478 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
3479 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
3480 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
3481 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
3486 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3489 remote_target::parse_threadlist_response (const char *pkt
, int result_limit
,
3490 threadref
*original_echo
,
3491 threadref
*resultlist
,
3494 struct remote_state
*rs
= get_remote_state ();
3495 int count
, resultcount
, done
;
3498 /* Assume the 'q' and 'M chars have been stripped. */
3499 const char *limit
= pkt
+ (rs
->buf
.size () - BUF_THREAD_ID_SIZE
);
3500 /* done parse past here */
3501 pkt
= unpack_byte (pkt
, &count
); /* count field */
3502 pkt
= unpack_nibble (pkt
, &done
);
3503 /* The first threadid is the argument threadid. */
3504 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
3505 while ((count
-- > 0) && (pkt
< limit
))
3507 pkt
= unpack_threadid (pkt
, resultlist
++);
3508 if (resultcount
++ >= result_limit
)
3516 /* Fetch the next batch of threads from the remote. Returns -1 if the
3517 qL packet is not supported, 0 on error and 1 on success. */
3520 remote_target::remote_get_threadlist (int startflag
, threadref
*nextthread
,
3521 int result_limit
, int *done
, int *result_count
,
3522 threadref
*threadlist
)
3524 struct remote_state
*rs
= get_remote_state ();
3527 /* Truncate result limit to be smaller than the packet size. */
3528 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
3529 >= get_remote_packet_size ())
3530 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
3532 pack_threadlist_request (rs
->buf
.data (), startflag
, result_limit
,
3535 getpkt (&rs
->buf
, 0);
3536 if (rs
->buf
[0] == '\0')
3538 /* Packet not supported. */
3543 parse_threadlist_response (&rs
->buf
[2], result_limit
,
3544 &rs
->echo_nextthread
, threadlist
, done
);
3546 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
3548 /* FIXME: This is a good reason to drop the packet. */
3549 /* Possibly, there is a duplicate response. */
3551 retransmit immediatly - race conditions
3552 retransmit after timeout - yes
3554 wait for packet, then exit
3556 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3557 return 0; /* I choose simply exiting. */
3559 if (*result_count
<= 0)
3563 warning (_("RMT ERROR : failed to get remote thread list."));
3566 return result
; /* break; */
3568 if (*result_count
> result_limit
)
3571 warning (_("RMT ERROR: threadlist response longer than requested."));
3577 /* Fetch the list of remote threads, with the qL packet, and call
3578 STEPFUNCTION for each thread found. Stops iterating and returns 1
3579 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3580 STEPFUNCTION returns false. If the packet is not supported,
3584 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction
,
3585 void *context
, int looplimit
)
3587 struct remote_state
*rs
= get_remote_state ();
3588 int done
, i
, result_count
;
3596 if (loopcount
++ > looplimit
)
3599 warning (_("Remote fetch threadlist -infinite loop-."));
3602 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
3603 MAXTHREADLISTRESULTS
,
3604 &done
, &result_count
,
3605 rs
->resultthreadlist
);
3608 /* Clear for later iterations. */
3610 /* Setup to resume next batch of thread references, set nextthread. */
3611 if (result_count
>= 1)
3612 copy_threadref (&rs
->nextthread
,
3613 &rs
->resultthreadlist
[result_count
- 1]);
3615 while (result_count
--)
3617 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
3627 /* A thread found on the remote target. */
3631 explicit thread_item (ptid_t ptid_
)
3635 thread_item (thread_item
&&other
) = default;
3636 thread_item
&operator= (thread_item
&&other
) = default;
3638 DISABLE_COPY_AND_ASSIGN (thread_item
);
3640 /* The thread's PTID. */
3643 /* The thread's extra info. */
3646 /* The thread's name. */
3649 /* The core the thread was running on. -1 if not known. */
3652 /* The thread handle associated with the thread. */
3653 gdb::byte_vector thread_handle
;
3656 /* Context passed around to the various methods listing remote
3657 threads. As new threads are found, they're added to the ITEMS
3660 struct threads_listing_context
3662 /* Return true if this object contains an entry for a thread with ptid
3665 bool contains_thread (ptid_t ptid
) const
3667 auto match_ptid
= [&] (const thread_item
&item
)
3669 return item
.ptid
== ptid
;
3672 auto it
= std::find_if (this->items
.begin (),
3676 return it
!= this->items
.end ();
3679 /* Remove the thread with ptid PTID. */
3681 void remove_thread (ptid_t ptid
)
3683 auto match_ptid
= [&] (const thread_item
&item
)
3685 return item
.ptid
== ptid
;
3688 auto it
= std::remove_if (this->items
.begin (),
3692 if (it
!= this->items
.end ())
3693 this->items
.erase (it
);
3696 /* The threads found on the remote target. */
3697 std::vector
<thread_item
> items
;
3701 remote_newthread_step (threadref
*ref
, void *data
)
3703 struct threads_listing_context
*context
3704 = (struct threads_listing_context
*) data
;
3705 int pid
= inferior_ptid
.pid ();
3706 int lwp
= threadref_to_int (ref
);
3707 ptid_t
ptid (pid
, lwp
);
3709 context
->items
.emplace_back (ptid
);
3711 return 1; /* continue iterator */
3714 #define CRAZY_MAX_THREADS 1000
3717 remote_target::remote_current_thread (ptid_t oldpid
)
3719 struct remote_state
*rs
= get_remote_state ();
3722 getpkt (&rs
->buf
, 0);
3723 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3728 result
= read_ptid (&rs
->buf
[2], &obuf
);
3730 remote_debug_printf ("warning: garbage in qC reply");
3738 /* List remote threads using the deprecated qL packet. */
3741 remote_target::remote_get_threads_with_ql (threads_listing_context
*context
)
3743 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3744 CRAZY_MAX_THREADS
) >= 0)
3750 #if defined(HAVE_LIBEXPAT)
3753 start_thread (struct gdb_xml_parser
*parser
,
3754 const struct gdb_xml_element
*element
,
3756 std::vector
<gdb_xml_value
> &attributes
)
3758 struct threads_listing_context
*data
3759 = (struct threads_listing_context
*) user_data
;
3760 struct gdb_xml_value
*attr
;
3762 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3763 ptid_t ptid
= read_ptid (id
, NULL
);
3765 data
->items
.emplace_back (ptid
);
3766 thread_item
&item
= data
->items
.back ();
3768 attr
= xml_find_attribute (attributes
, "core");
3770 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3772 attr
= xml_find_attribute (attributes
, "name");
3774 item
.name
= (const char *) attr
->value
.get ();
3776 attr
= xml_find_attribute (attributes
, "handle");
3778 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3782 end_thread (struct gdb_xml_parser
*parser
,
3783 const struct gdb_xml_element
*element
,
3784 void *user_data
, const char *body_text
)
3786 struct threads_listing_context
*data
3787 = (struct threads_listing_context
*) user_data
;
3789 if (body_text
!= NULL
&& *body_text
!= '\0')
3790 data
->items
.back ().extra
= body_text
;
3793 const struct gdb_xml_attribute thread_attributes
[] = {
3794 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3795 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3796 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3797 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3798 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3801 const struct gdb_xml_element thread_children
[] = {
3802 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3805 const struct gdb_xml_element threads_children
[] = {
3806 { "thread", thread_attributes
, thread_children
,
3807 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3808 start_thread
, end_thread
},
3809 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3812 const struct gdb_xml_element threads_elements
[] = {
3813 { "threads", NULL
, threads_children
,
3814 GDB_XML_EF_NONE
, NULL
, NULL
},
3815 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3820 /* List remote threads using qXfer:threads:read. */
3823 remote_target::remote_get_threads_with_qxfer (threads_listing_context
*context
)
3825 #if defined(HAVE_LIBEXPAT)
3826 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3828 gdb::optional
<gdb::char_vector
> xml
3829 = target_read_stralloc (this, TARGET_OBJECT_THREADS
, NULL
);
3831 if (xml
&& (*xml
)[0] != '\0')
3833 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3834 threads_elements
, xml
->data (), context
);
3844 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3847 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context
*context
)
3849 struct remote_state
*rs
= get_remote_state ();
3851 if (rs
->use_threadinfo_query
)
3855 putpkt ("qfThreadInfo");
3856 getpkt (&rs
->buf
, 0);
3857 bufp
= rs
->buf
.data ();
3858 if (bufp
[0] != '\0') /* q packet recognized */
3860 while (*bufp
++ == 'm') /* reply contains one or more TID */
3864 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3865 context
->items
.emplace_back (ptid
);
3867 while (*bufp
++ == ','); /* comma-separated list */
3868 putpkt ("qsThreadInfo");
3869 getpkt (&rs
->buf
, 0);
3870 bufp
= rs
->buf
.data ();
3876 /* Packet not recognized. */
3877 rs
->use_threadinfo_query
= 0;
3884 /* Return true if INF only has one non-exited thread. */
3887 has_single_non_exited_thread (inferior
*inf
)
3890 for (thread_info
*tp ATTRIBUTE_UNUSED
: inf
->non_exited_threads ())
3896 /* Implement the to_update_thread_list function for the remote
3900 remote_target::update_thread_list ()
3902 struct threads_listing_context context
;
3905 /* We have a few different mechanisms to fetch the thread list. Try
3906 them all, starting with the most preferred one first, falling
3907 back to older methods. */
3908 if (remote_get_threads_with_qxfer (&context
)
3909 || remote_get_threads_with_qthreadinfo (&context
)
3910 || remote_get_threads_with_ql (&context
))
3914 if (context
.items
.empty ()
3915 && remote_thread_always_alive (inferior_ptid
))
3917 /* Some targets don't really support threads, but still
3918 reply an (empty) thread list in response to the thread
3919 listing packets, instead of replying "packet not
3920 supported". Exit early so we don't delete the main
3925 /* CONTEXT now holds the current thread list on the remote
3926 target end. Delete GDB-side threads no longer found on the
3928 for (thread_info
*tp
: all_threads_safe ())
3930 if (tp
->inf
->process_target () != this)
3933 if (!context
.contains_thread (tp
->ptid
))
3935 /* Do not remove the thread if it is the last thread in
3936 the inferior. This situation happens when we have a
3937 pending exit process status to process. Otherwise we
3938 may end up with a seemingly live inferior (i.e. pid
3939 != 0) that has no threads. */
3940 if (has_single_non_exited_thread (tp
->inf
))
3948 /* Remove any unreported fork child threads from CONTEXT so
3949 that we don't interfere with follow fork, which is where
3950 creation of such threads is handled. */
3951 remove_new_fork_children (&context
);
3953 /* And now add threads we don't know about yet to our list. */
3954 for (thread_item
&item
: context
.items
)
3956 if (item
.ptid
!= null_ptid
)
3958 /* In non-stop mode, we assume new found threads are
3959 executing until proven otherwise with a stop reply.
3960 In all-stop, we can only get here if all threads are
3962 bool executing
= target_is_non_stop_p ();
3964 remote_notice_new_inferior (item
.ptid
, executing
);
3966 thread_info
*tp
= find_thread_ptid (this, item
.ptid
);
3967 remote_thread_info
*info
= get_remote_thread_info (tp
);
3968 info
->core
= item
.core
;
3969 info
->extra
= std::move (item
.extra
);
3970 info
->name
= std::move (item
.name
);
3971 info
->thread_handle
= std::move (item
.thread_handle
);
3978 /* If no thread listing method is supported, then query whether
3979 each known thread is alive, one by one, with the T packet.
3980 If the target doesn't support threads at all, then this is a
3981 no-op. See remote_thread_alive. */
3987 * Collect a descriptive string about the given thread.
3988 * The target may say anything it wants to about the thread
3989 * (typically info about its blocked / runnable state, name, etc.).
3990 * This string will appear in the info threads display.
3992 * Optional: targets are not required to implement this function.
3996 remote_target::extra_thread_info (thread_info
*tp
)
3998 struct remote_state
*rs
= get_remote_state ();
4001 struct gdb_ext_thread_info threadinfo
;
4003 if (rs
->remote_desc
== 0) /* paranoia */
4004 internal_error (__FILE__
, __LINE__
,
4005 _("remote_threads_extra_info"));
4007 if (tp
->ptid
== magic_null_ptid
4008 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
4009 /* This is the main thread which was added by GDB. The remote
4010 server doesn't know about it. */
4013 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
4015 /* If already have cached info, use it. */
4016 if (!extra
.empty ())
4017 return extra
.c_str ();
4019 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
4021 /* If we're using qXfer:threads:read, then the extra info is
4022 included in the XML. So if we didn't have anything cached,
4023 it's because there's really no extra info. */
4027 if (rs
->use_threadextra_query
)
4029 char *b
= rs
->buf
.data ();
4030 char *endb
= b
+ get_remote_packet_size ();
4032 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
4034 write_ptid (b
, endb
, tp
->ptid
);
4037 getpkt (&rs
->buf
, 0);
4038 if (rs
->buf
[0] != 0)
4040 extra
.resize (strlen (rs
->buf
.data ()) / 2);
4041 hex2bin (rs
->buf
.data (), (gdb_byte
*) &extra
[0], extra
.size ());
4042 return extra
.c_str ();
4046 /* If the above query fails, fall back to the old method. */
4047 rs
->use_threadextra_query
= 0;
4048 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
4049 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
4050 int_to_threadref (&id
, tp
->ptid
.lwp ());
4051 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
4052 if (threadinfo
.active
)
4054 if (*threadinfo
.shortname
)
4055 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
4056 if (*threadinfo
.display
)
4058 if (!extra
.empty ())
4060 string_appendf (extra
, " State: %s", threadinfo
.display
);
4062 if (*threadinfo
.more_display
)
4064 if (!extra
.empty ())
4066 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
4068 return extra
.c_str ();
4075 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
4076 struct static_tracepoint_marker
*marker
)
4078 struct remote_state
*rs
= get_remote_state ();
4079 char *p
= rs
->buf
.data ();
4081 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
4083 p
+= hexnumstr (p
, addr
);
4085 getpkt (&rs
->buf
, 0);
4086 p
= rs
->buf
.data ();
4089 error (_("Remote failure reply: %s"), p
);
4093 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
4100 std::vector
<static_tracepoint_marker
>
4101 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
4103 struct remote_state
*rs
= get_remote_state ();
4104 std::vector
<static_tracepoint_marker
> markers
;
4106 static_tracepoint_marker marker
;
4108 /* Ask for a first packet of static tracepoint marker
4111 getpkt (&rs
->buf
, 0);
4112 p
= rs
->buf
.data ();
4114 error (_("Remote failure reply: %s"), p
);
4120 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
4122 if (strid
== NULL
|| marker
.str_id
== strid
)
4123 markers
.push_back (std::move (marker
));
4125 while (*p
++ == ','); /* comma-separated list */
4126 /* Ask for another packet of static tracepoint definition. */
4128 getpkt (&rs
->buf
, 0);
4129 p
= rs
->buf
.data ();
4136 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4139 remote_target::get_ada_task_ptid (long lwp
, ULONGEST thread
)
4141 return ptid_t (inferior_ptid
.pid (), lwp
);
4145 /* Restart the remote side; this is an extended protocol operation. */
4148 remote_target::extended_remote_restart ()
4150 struct remote_state
*rs
= get_remote_state ();
4152 /* Send the restart command; for reasons I don't understand the
4153 remote side really expects a number after the "R". */
4154 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "R%x", 0);
4157 remote_fileio_reset ();
4160 /* Clean up connection to a remote debugger. */
4163 remote_target::close ()
4165 /* Make sure we leave stdin registered in the event loop. */
4168 trace_reset_local_state ();
4173 remote_target::~remote_target ()
4175 struct remote_state
*rs
= get_remote_state ();
4177 /* Check for NULL because we may get here with a partially
4178 constructed target/connection. */
4179 if (rs
->remote_desc
== nullptr)
4182 serial_close (rs
->remote_desc
);
4184 /* We are destroying the remote target, so we should discard
4185 everything of this target. */
4186 discard_pending_stop_replies_in_queue ();
4188 if (rs
->remote_async_inferior_event_token
)
4189 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4191 delete rs
->notif_state
;
4194 /* Query the remote side for the text, data and bss offsets. */
4197 remote_target::get_offsets ()
4199 struct remote_state
*rs
= get_remote_state ();
4202 int lose
, num_segments
= 0, do_sections
, do_segments
;
4203 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4205 if (current_program_space
->symfile_object_file
== NULL
)
4208 putpkt ("qOffsets");
4209 getpkt (&rs
->buf
, 0);
4210 buf
= rs
->buf
.data ();
4212 if (buf
[0] == '\000')
4213 return; /* Return silently. Stub doesn't support
4217 warning (_("Remote failure reply: %s"), buf
);
4221 /* Pick up each field in turn. This used to be done with scanf, but
4222 scanf will make trouble if CORE_ADDR size doesn't match
4223 conversion directives correctly. The following code will work
4224 with any size of CORE_ADDR. */
4225 text_addr
= data_addr
= bss_addr
= 0;
4229 if (startswith (ptr
, "Text="))
4232 /* Don't use strtol, could lose on big values. */
4233 while (*ptr
&& *ptr
!= ';')
4234 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4236 if (startswith (ptr
, ";Data="))
4239 while (*ptr
&& *ptr
!= ';')
4240 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4245 if (!lose
&& startswith (ptr
, ";Bss="))
4248 while (*ptr
&& *ptr
!= ';')
4249 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4251 if (bss_addr
!= data_addr
)
4252 warning (_("Target reported unsupported offsets: %s"), buf
);
4257 else if (startswith (ptr
, "TextSeg="))
4260 /* Don't use strtol, could lose on big values. */
4261 while (*ptr
&& *ptr
!= ';')
4262 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4265 if (startswith (ptr
, ";DataSeg="))
4268 while (*ptr
&& *ptr
!= ';')
4269 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4277 error (_("Malformed response to offset query, %s"), buf
);
4278 else if (*ptr
!= '\0')
4279 warning (_("Target reported unsupported offsets: %s"), buf
);
4281 objfile
*objf
= current_program_space
->symfile_object_file
;
4282 section_offsets offs
= objf
->section_offsets
;
4284 symfile_segment_data_up data
= get_symfile_segment_data (objf
->obfd
);
4285 do_segments
= (data
!= NULL
);
4286 do_sections
= num_segments
== 0;
4288 if (num_segments
> 0)
4290 segments
[0] = text_addr
;
4291 segments
[1] = data_addr
;
4293 /* If we have two segments, we can still try to relocate everything
4294 by assuming that the .text and .data offsets apply to the whole
4295 text and data segments. Convert the offsets given in the packet
4296 to base addresses for symfile_map_offsets_to_segments. */
4297 else if (data
!= nullptr && data
->segments
.size () == 2)
4299 segments
[0] = data
->segments
[0].base
+ text_addr
;
4300 segments
[1] = data
->segments
[1].base
+ data_addr
;
4303 /* If the object file has only one segment, assume that it is text
4304 rather than data; main programs with no writable data are rare,
4305 but programs with no code are useless. Of course the code might
4306 have ended up in the data segment... to detect that we would need
4307 the permissions here. */
4308 else if (data
&& data
->segments
.size () == 1)
4310 segments
[0] = data
->segments
[0].base
+ text_addr
;
4313 /* There's no way to relocate by segment. */
4319 int ret
= symfile_map_offsets_to_segments (objf
->obfd
,
4321 num_segments
, segments
);
4323 if (ret
== 0 && !do_sections
)
4324 error (_("Can not handle qOffsets TextSeg "
4325 "response with this symbol file"));
4333 offs
[SECT_OFF_TEXT (objf
)] = text_addr
;
4335 /* This is a temporary kludge to force data and bss to use the
4336 same offsets because that's what nlmconv does now. The real
4337 solution requires changes to the stub and remote.c that I
4338 don't have time to do right now. */
4340 offs
[SECT_OFF_DATA (objf
)] = data_addr
;
4341 offs
[SECT_OFF_BSS (objf
)] = data_addr
;
4344 objfile_relocate (objf
, offs
);
4347 /* Send interrupt_sequence to remote target. */
4350 remote_target::send_interrupt_sequence ()
4352 struct remote_state
*rs
= get_remote_state ();
4354 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4355 remote_serial_write ("\x03", 1);
4356 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4357 serial_send_break (rs
->remote_desc
);
4358 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4360 serial_send_break (rs
->remote_desc
);
4361 remote_serial_write ("g", 1);
4364 internal_error (__FILE__
, __LINE__
,
4365 _("Invalid value for interrupt_sequence_mode: %s."),
4366 interrupt_sequence_mode
);
4370 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4371 and extract the PTID. Returns NULL_PTID if not found. */
4374 stop_reply_extract_thread (const char *stop_reply
)
4376 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4380 /* Txx r:val ; r:val (...) */
4383 /* Look for "register" named "thread". */
4388 p1
= strchr (p
, ':');
4392 if (strncmp (p
, "thread", p1
- p
) == 0)
4393 return read_ptid (++p1
, &p
);
4395 p1
= strchr (p
, ';');
4407 /* Determine the remote side's current thread. If we have a stop
4408 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4409 "thread" register we can extract the current thread from. If not,
4410 ask the remote which is the current thread with qC. The former
4411 method avoids a roundtrip. */
4414 remote_target::get_current_thread (const char *wait_status
)
4416 ptid_t ptid
= null_ptid
;
4418 /* Note we don't use remote_parse_stop_reply as that makes use of
4419 the target architecture, which we haven't yet fully determined at
4421 if (wait_status
!= NULL
)
4422 ptid
= stop_reply_extract_thread (wait_status
);
4423 if (ptid
== null_ptid
)
4424 ptid
= remote_current_thread (inferior_ptid
);
4429 /* Query the remote target for which is the current thread/process,
4430 add it to our tables, and update INFERIOR_PTID. The caller is
4431 responsible for setting the state such that the remote end is ready
4432 to return the current thread.
4434 This function is called after handling the '?' or 'vRun' packets,
4435 whose response is a stop reply from which we can also try
4436 extracting the thread. If the target doesn't support the explicit
4437 qC query, we infer the current thread from that stop reply, passed
4438 in in WAIT_STATUS, which may be NULL.
4440 The function returns pointer to the main thread of the inferior. */
4443 remote_target::add_current_inferior_and_thread (const char *wait_status
)
4445 struct remote_state
*rs
= get_remote_state ();
4446 bool fake_pid_p
= false;
4448 switch_to_no_thread ();
4450 /* Now, if we have thread information, update the current thread's
4452 ptid_t curr_ptid
= get_current_thread (wait_status
);
4454 if (curr_ptid
!= null_ptid
)
4456 if (!remote_multi_process_p (rs
))
4461 /* Without this, some commands which require an active target
4462 (such as kill) won't work. This variable serves (at least)
4463 double duty as both the pid of the target process (if it has
4464 such), and as a flag indicating that a target is active. */
4465 curr_ptid
= magic_null_ptid
;
4469 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4471 /* Add the main thread and switch to it. Don't try reading
4472 registers yet, since we haven't fetched the target description
4474 thread_info
*tp
= add_thread_silent (this, curr_ptid
);
4475 switch_to_thread_no_regs (tp
);
4480 /* Print info about a thread that was found already stopped on
4484 remote_target::print_one_stopped_thread (thread_info
*thread
)
4486 target_waitstatus ws
;
4488 /* If there is a pending waitstatus, use it. If there isn't it's because
4489 the thread's stop was reported with TARGET_WAITKIND_STOPPED / GDB_SIGNAL_0
4490 and process_initial_stop_replies decided it wasn't interesting to save
4491 and report to the core. */
4492 if (thread
->has_pending_waitstatus ())
4494 ws
= thread
->pending_waitstatus ();
4495 thread
->clear_pending_waitstatus ();
4499 ws
.set_stopped (GDB_SIGNAL_0
);
4502 switch_to_thread (thread
);
4503 thread
->set_stop_pc (get_frame_pc (get_current_frame ()));
4504 set_current_sal_from_frame (get_current_frame ());
4506 /* For "info program". */
4507 set_last_target_status (this, thread
->ptid
, ws
);
4509 if (ws
.kind () == TARGET_WAITKIND_STOPPED
)
4511 enum gdb_signal sig
= ws
.sig ();
4513 if (signal_print_state (sig
))
4514 gdb::observers::signal_received
.notify (sig
);
4516 gdb::observers::normal_stop
.notify (NULL
, 1);
4519 /* Process all initial stop replies the remote side sent in response
4520 to the ? packet. These indicate threads that were already stopped
4521 on initial connection. We mark these threads as stopped and print
4522 their current frame before giving the user the prompt. */
4525 remote_target::process_initial_stop_replies (int from_tty
)
4527 int pending_stop_replies
= stop_reply_queue_length ();
4528 struct thread_info
*selected
= NULL
;
4529 struct thread_info
*lowest_stopped
= NULL
;
4530 struct thread_info
*first
= NULL
;
4532 /* This is only used when the target is non-stop. */
4533 gdb_assert (target_is_non_stop_p ());
4535 /* Consume the initial pending events. */
4536 while (pending_stop_replies
-- > 0)
4538 ptid_t waiton_ptid
= minus_one_ptid
;
4540 struct target_waitstatus ws
;
4541 int ignore_event
= 0;
4543 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4545 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4549 case TARGET_WAITKIND_IGNORE
:
4550 case TARGET_WAITKIND_NO_RESUMED
:
4551 case TARGET_WAITKIND_SIGNALLED
:
4552 case TARGET_WAITKIND_EXITED
:
4553 /* We shouldn't see these, but if we do, just ignore. */
4554 remote_debug_printf ("event ignored");
4565 thread_info
*evthread
= find_thread_ptid (this, event_ptid
);
4567 if (ws
.kind () == TARGET_WAITKIND_STOPPED
)
4569 enum gdb_signal sig
= ws
.sig ();
4571 /* Stubs traditionally report SIGTRAP as initial signal,
4572 instead of signal 0. Suppress it. */
4573 if (sig
== GDB_SIGNAL_TRAP
)
4575 evthread
->set_stop_signal (sig
);
4576 ws
.set_stopped (sig
);
4579 if (ws
.kind () != TARGET_WAITKIND_STOPPED
4580 || ws
.sig () != GDB_SIGNAL_0
)
4581 evthread
->set_pending_waitstatus (ws
);
4583 set_executing (this, event_ptid
, false);
4584 set_running (this, event_ptid
, false);
4585 get_remote_thread_info (evthread
)->set_not_resumed ();
4588 /* "Notice" the new inferiors before anything related to
4589 registers/memory. */
4590 for (inferior
*inf
: all_non_exited_inferiors (this))
4592 inf
->needs_setup
= 1;
4596 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4597 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4602 /* If all-stop on top of non-stop, pause all threads. Note this
4603 records the threads' stop pc, so must be done after "noticing"
4608 /* At this point, the remote target is not async. It needs to be for
4609 the poll in stop_all_threads to consider events from it, so enable
4611 gdb_assert (!this->is_async_p ());
4612 SCOPE_EXIT
{ target_async (0); };
4614 stop_all_threads ();
4617 /* If all threads of an inferior were already stopped, we
4618 haven't setup the inferior yet. */
4619 for (inferior
*inf
: all_non_exited_inferiors (this))
4621 if (inf
->needs_setup
)
4623 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4624 switch_to_thread_no_regs (thread
);
4630 /* Now go over all threads that are stopped, and print their current
4631 frame. If all-stop, then if there's a signalled thread, pick
4633 for (thread_info
*thread
: all_non_exited_threads (this))
4639 thread
->set_running (false);
4640 else if (thread
->state
!= THREAD_STOPPED
)
4643 if (selected
== nullptr && thread
->has_pending_waitstatus ())
4646 if (lowest_stopped
== NULL
4647 || thread
->inf
->num
< lowest_stopped
->inf
->num
4648 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4649 lowest_stopped
= thread
;
4652 print_one_stopped_thread (thread
);
4655 /* In all-stop, we only print the status of one thread, and leave
4656 others with their status pending. */
4659 thread_info
*thread
= selected
;
4661 thread
= lowest_stopped
;
4665 print_one_stopped_thread (thread
);
4669 /* Start the remote connection and sync state. */
4672 remote_target::start_remote (int from_tty
, int extended_p
)
4674 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
4676 struct remote_state
*rs
= get_remote_state ();
4677 struct packet_config
*noack_config
;
4679 /* Signal other parts that we're going through the initial setup,
4680 and so things may not be stable yet. E.g., we don't try to
4681 install tracepoints until we've relocated symbols. Also, a
4682 Ctrl-C before we're connected and synced up can't interrupt the
4683 target. Instead, it offers to drop the (potentially wedged)
4685 rs
->starting_up
= true;
4689 if (interrupt_on_connect
)
4690 send_interrupt_sequence ();
4692 /* Ack any packet which the remote side has already sent. */
4693 remote_serial_write ("+", 1);
4695 /* The first packet we send to the target is the optional "supported
4696 packets" request. If the target can answer this, it will tell us
4697 which later probes to skip. */
4698 remote_query_supported ();
4700 /* If the stub wants to get a QAllow, compose one and send it. */
4701 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4704 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4705 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4706 as a reply to known packet. For packet "vFile:setfs:" it is an
4707 invalid reply and GDB would return error in
4708 remote_hostio_set_filesystem, making remote files access impossible.
4709 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4710 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4712 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4714 putpkt (v_mustreplyempty
);
4715 getpkt (&rs
->buf
, 0);
4716 if (strcmp (rs
->buf
.data (), "OK") == 0)
4717 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4718 else if (strcmp (rs
->buf
.data (), "") != 0)
4719 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4723 /* Next, we possibly activate noack mode.
4725 If the QStartNoAckMode packet configuration is set to AUTO,
4726 enable noack mode if the stub reported a wish for it with
4729 If set to TRUE, then enable noack mode even if the stub didn't
4730 report it in qSupported. If the stub doesn't reply OK, the
4731 session ends with an error.
4733 If FALSE, then don't activate noack mode, regardless of what the
4734 stub claimed should be the default with qSupported. */
4736 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4737 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4739 putpkt ("QStartNoAckMode");
4740 getpkt (&rs
->buf
, 0);
4741 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4747 /* Tell the remote that we are using the extended protocol. */
4749 getpkt (&rs
->buf
, 0);
4752 /* Let the target know which signals it is allowed to pass down to
4754 update_signals_program_target ();
4756 /* Next, if the target can specify a description, read it. We do
4757 this before anything involving memory or registers. */
4758 target_find_description ();
4760 /* Next, now that we know something about the target, update the
4761 address spaces in the program spaces. */
4762 update_address_spaces ();
4764 /* On OSs where the list of libraries is global to all
4765 processes, we fetch them early. */
4766 if (gdbarch_has_global_solist (target_gdbarch ()))
4767 solib_add (NULL
, from_tty
, auto_solib_add
);
4769 if (target_is_non_stop_p ())
4771 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4772 error (_("Non-stop mode requested, but remote "
4773 "does not support non-stop"));
4775 putpkt ("QNonStop:1");
4776 getpkt (&rs
->buf
, 0);
4778 if (strcmp (rs
->buf
.data (), "OK") != 0)
4779 error (_("Remote refused setting non-stop mode with: %s"),
4782 /* Find about threads and processes the stub is already
4783 controlling. We default to adding them in the running state.
4784 The '?' query below will then tell us about which threads are
4786 this->update_thread_list ();
4788 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4790 /* Don't assume that the stub can operate in all-stop mode.
4791 Request it explicitly. */
4792 putpkt ("QNonStop:0");
4793 getpkt (&rs
->buf
, 0);
4795 if (strcmp (rs
->buf
.data (), "OK") != 0)
4796 error (_("Remote refused setting all-stop mode with: %s"),
4800 /* Upload TSVs regardless of whether the target is running or not. The
4801 remote stub, such as GDBserver, may have some predefined or builtin
4802 TSVs, even if the target is not running. */
4803 if (get_trace_status (current_trace_status ()) != -1)
4805 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4807 upload_trace_state_variables (&uploaded_tsvs
);
4808 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4811 /* Check whether the target is running now. */
4813 getpkt (&rs
->buf
, 0);
4815 if (!target_is_non_stop_p ())
4817 char *wait_status
= NULL
;
4819 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4822 error (_("The target is not running (try extended-remote?)"));
4824 /* We're connected, but not running. Drop out before we
4825 call start_remote. */
4826 rs
->starting_up
= false;
4831 /* Save the reply for later. */
4832 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4833 strcpy (wait_status
, rs
->buf
.data ());
4836 /* Fetch thread list. */
4837 target_update_thread_list ();
4839 /* Let the stub know that we want it to return the thread. */
4840 set_continue_thread (minus_one_ptid
);
4842 if (thread_count (this) == 0)
4844 /* Target has no concept of threads at all. GDB treats
4845 non-threaded target as single-threaded; add a main
4847 thread_info
*tp
= add_current_inferior_and_thread (wait_status
);
4848 get_remote_thread_info (tp
)->set_resumed ();
4852 /* We have thread information; select the thread the target
4853 says should be current. If we're reconnecting to a
4854 multi-threaded program, this will ideally be the thread
4855 that last reported an event before GDB disconnected. */
4856 ptid_t curr_thread
= get_current_thread (wait_status
);
4857 if (curr_thread
== null_ptid
)
4859 /* Odd... The target was able to list threads, but not
4860 tell us which thread was current (no "thread"
4861 register in T stop reply?). Just pick the first
4862 thread in the thread list then. */
4864 remote_debug_printf ("warning: couldn't determine remote "
4865 "current thread; picking first in list.");
4867 for (thread_info
*tp
: all_non_exited_threads (this,
4870 switch_to_thread (tp
);
4875 switch_to_thread (find_thread_ptid (this, curr_thread
));
4878 /* init_wait_for_inferior should be called before get_offsets in order
4879 to manage `inserted' flag in bp loc in a correct state.
4880 breakpoint_init_inferior, called from init_wait_for_inferior, set
4881 `inserted' flag to 0, while before breakpoint_re_set, called from
4882 start_remote, set `inserted' flag to 1. In the initialization of
4883 inferior, breakpoint_init_inferior should be called first, and then
4884 breakpoint_re_set can be called. If this order is broken, state of
4885 `inserted' flag is wrong, and cause some problems on breakpoint
4887 init_wait_for_inferior ();
4889 get_offsets (); /* Get text, data & bss offsets. */
4891 /* If we could not find a description using qXfer, and we know
4892 how to do it some other way, try again. This is not
4893 supported for non-stop; it could be, but it is tricky if
4894 there are no stopped threads when we connect. */
4895 if (remote_read_description_p (this)
4896 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4898 target_clear_description ();
4899 target_find_description ();
4902 /* Use the previously fetched status. */
4903 gdb_assert (wait_status
!= NULL
);
4904 strcpy (rs
->buf
.data (), wait_status
);
4905 rs
->cached_wait_status
= 1;
4907 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4911 /* Clear WFI global state. Do this before finding about new
4912 threads and inferiors, and setting the current inferior.
4913 Otherwise we would clear the proceed status of the current
4914 inferior when we want its stop_soon state to be preserved
4915 (see notice_new_inferior). */
4916 init_wait_for_inferior ();
4918 /* In non-stop, we will either get an "OK", meaning that there
4919 are no stopped threads at this time; or, a regular stop
4920 reply. In the latter case, there may be more than one thread
4921 stopped --- we pull them all out using the vStopped
4923 if (strcmp (rs
->buf
.data (), "OK") != 0)
4925 struct notif_client
*notif
= ¬if_client_stop
;
4927 /* remote_notif_get_pending_replies acks this one, and gets
4929 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4930 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4931 remote_notif_get_pending_events (notif
);
4934 if (thread_count (this) == 0)
4937 error (_("The target is not running (try extended-remote?)"));
4939 /* We're connected, but not running. Drop out before we
4940 call start_remote. */
4941 rs
->starting_up
= false;
4945 /* Report all signals during attach/startup. */
4948 /* If there are already stopped threads, mark them stopped and
4949 report their stops before giving the prompt to the user. */
4950 process_initial_stop_replies (from_tty
);
4952 if (target_can_async_p ())
4956 /* If we connected to a live target, do some additional setup. */
4957 if (target_has_execution ())
4959 /* No use without a symbol-file. */
4960 if (current_program_space
->symfile_object_file
)
4961 remote_check_symbols ();
4964 /* Possibly the target has been engaged in a trace run started
4965 previously; find out where things are at. */
4966 if (get_trace_status (current_trace_status ()) != -1)
4968 struct uploaded_tp
*uploaded_tps
= NULL
;
4970 if (current_trace_status ()->running
)
4971 printf_filtered (_("Trace is already running on the target.\n"));
4973 upload_tracepoints (&uploaded_tps
);
4975 merge_uploaded_tracepoints (&uploaded_tps
);
4978 /* Possibly the target has been engaged in a btrace record started
4979 previously; find out where things are at. */
4980 remote_btrace_maybe_reopen ();
4982 /* The thread and inferior lists are now synchronized with the
4983 target, our symbols have been relocated, and we're merged the
4984 target's tracepoints with ours. We're done with basic start
4986 rs
->starting_up
= false;
4988 /* Maybe breakpoints are global and need to be inserted now. */
4989 if (breakpoints_should_be_inserted_now ())
4990 insert_breakpoints ();
4994 remote_target::connection_string ()
4996 remote_state
*rs
= get_remote_state ();
4998 if (rs
->remote_desc
->name
!= NULL
)
4999 return rs
->remote_desc
->name
;
5004 /* Open a connection to a remote debugger.
5005 NAME is the filename used for communication. */
5008 remote_target::open (const char *name
, int from_tty
)
5010 open_1 (name
, from_tty
, 0);
5013 /* Open a connection to a remote debugger using the extended
5014 remote gdb protocol. NAME is the filename used for communication. */
5017 extended_remote_target::open (const char *name
, int from_tty
)
5019 open_1 (name
, from_tty
, 1 /*extended_p */);
5022 /* Reset all packets back to "unknown support". Called when opening a
5023 new connection to a remote target. */
5026 reset_all_packet_configs_support (void)
5030 for (i
= 0; i
< PACKET_MAX
; i
++)
5031 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5034 /* Initialize all packet configs. */
5037 init_all_packet_configs (void)
5041 for (i
= 0; i
< PACKET_MAX
; i
++)
5043 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
5044 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5048 /* Symbol look-up. */
5051 remote_target::remote_check_symbols ()
5056 /* The remote side has no concept of inferiors that aren't running
5057 yet, it only knows about running processes. If we're connected
5058 but our current inferior is not running, we should not invite the
5059 remote target to request symbol lookups related to its
5060 (unrelated) current process. */
5061 if (!target_has_execution ())
5064 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
5067 /* Make sure the remote is pointing at the right process. Note
5068 there's no way to select "no process". */
5069 set_general_process ();
5071 /* Allocate a message buffer. We can't reuse the input buffer in RS,
5072 because we need both at the same time. */
5073 gdb::char_vector
msg (get_remote_packet_size ());
5074 gdb::char_vector
reply (get_remote_packet_size ());
5076 /* Invite target to request symbol lookups. */
5078 putpkt ("qSymbol::");
5080 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
5082 while (startswith (reply
.data (), "qSymbol:"))
5084 struct bound_minimal_symbol sym
;
5087 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
5090 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
5091 if (sym
.minsym
== NULL
)
5092 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
5096 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5097 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
5099 /* If this is a function address, return the start of code
5100 instead of any data function descriptor. */
5101 sym_addr
= gdbarch_convert_from_func_ptr_addr
5102 (target_gdbarch (), sym_addr
, current_inferior ()->top_target ());
5104 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
5105 phex_nz (sym_addr
, addr_size
), &reply
[8]);
5108 putpkt (msg
.data ());
5113 static struct serial
*
5114 remote_serial_open (const char *name
)
5116 static int udp_warning
= 0;
5118 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
5119 of in ser-tcp.c, because it is the remote protocol assuming that the
5120 serial connection is reliable and not the serial connection promising
5122 if (!udp_warning
&& startswith (name
, "udp:"))
5124 warning (_("The remote protocol may be unreliable over UDP.\n"
5125 "Some events may be lost, rendering further debugging "
5130 return serial_open (name
);
5133 /* Inform the target of our permission settings. The permission flags
5134 work without this, but if the target knows the settings, it can do
5135 a couple things. First, it can add its own check, to catch cases
5136 that somehow manage to get by the permissions checks in target
5137 methods. Second, if the target is wired to disallow particular
5138 settings (for instance, a system in the field that is not set up to
5139 be able to stop at a breakpoint), it can object to any unavailable
5143 remote_target::set_permissions ()
5145 struct remote_state
*rs
= get_remote_state ();
5147 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
5148 "WriteReg:%x;WriteMem:%x;"
5149 "InsertBreak:%x;InsertTrace:%x;"
5150 "InsertFastTrace:%x;Stop:%x",
5151 may_write_registers
, may_write_memory
,
5152 may_insert_breakpoints
, may_insert_tracepoints
,
5153 may_insert_fast_tracepoints
, may_stop
);
5155 getpkt (&rs
->buf
, 0);
5157 /* If the target didn't like the packet, warn the user. Do not try
5158 to undo the user's settings, that would just be maddening. */
5159 if (strcmp (rs
->buf
.data (), "OK") != 0)
5160 warning (_("Remote refused setting permissions with: %s"),
5164 /* This type describes each known response to the qSupported
5166 struct protocol_feature
5168 /* The name of this protocol feature. */
5171 /* The default for this protocol feature. */
5172 enum packet_support default_support
;
5174 /* The function to call when this feature is reported, or after
5175 qSupported processing if the feature is not supported.
5176 The first argument points to this structure. The second
5177 argument indicates whether the packet requested support be
5178 enabled, disabled, or probed (or the default, if this function
5179 is being called at the end of processing and this feature was
5180 not reported). The third argument may be NULL; if not NULL, it
5181 is a NUL-terminated string taken from the packet following
5182 this feature's name and an equals sign. */
5183 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5184 enum packet_support
, const char *);
5186 /* The corresponding packet for this feature. Only used if
5187 FUNC is remote_supported_packet. */
5192 remote_supported_packet (remote_target
*remote
,
5193 const struct protocol_feature
*feature
,
5194 enum packet_support support
,
5195 const char *argument
)
5199 warning (_("Remote qSupported response supplied an unexpected value for"
5200 " \"%s\"."), feature
->name
);
5204 remote_protocol_packets
[feature
->packet
].support
= support
;
5208 remote_target::remote_packet_size (const protocol_feature
*feature
,
5209 enum packet_support support
, const char *value
)
5211 struct remote_state
*rs
= get_remote_state ();
5216 if (support
!= PACKET_ENABLE
)
5219 if (value
== NULL
|| *value
== '\0')
5221 warning (_("Remote target reported \"%s\" without a size."),
5227 packet_size
= strtol (value
, &value_end
, 16);
5228 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5230 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5231 feature
->name
, value
);
5235 /* Record the new maximum packet size. */
5236 rs
->explicit_packet_size
= packet_size
;
5240 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5241 enum packet_support support
, const char *value
)
5243 remote
->remote_packet_size (feature
, support
, value
);
5246 static const struct protocol_feature remote_protocol_features
[] = {
5247 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5248 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5249 PACKET_qXfer_auxv
},
5250 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5251 PACKET_qXfer_exec_file
},
5252 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5253 PACKET_qXfer_features
},
5254 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5255 PACKET_qXfer_libraries
},
5256 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5257 PACKET_qXfer_libraries_svr4
},
5258 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5259 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5260 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5261 PACKET_qXfer_memory_map
},
5262 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5263 PACKET_qXfer_osdata
},
5264 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5265 PACKET_qXfer_threads
},
5266 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5267 PACKET_qXfer_traceframe_info
},
5268 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5269 PACKET_QPassSignals
},
5270 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5271 PACKET_QCatchSyscalls
},
5272 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5273 PACKET_QProgramSignals
},
5274 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5275 PACKET_QSetWorkingDir
},
5276 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5277 PACKET_QStartupWithShell
},
5278 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5279 PACKET_QEnvironmentHexEncoded
},
5280 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5281 PACKET_QEnvironmentReset
},
5282 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5283 PACKET_QEnvironmentUnset
},
5284 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5285 PACKET_QStartNoAckMode
},
5286 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5287 PACKET_multiprocess_feature
},
5288 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5289 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5290 PACKET_qXfer_siginfo_read
},
5291 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5292 PACKET_qXfer_siginfo_write
},
5293 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5294 PACKET_ConditionalTracepoints
},
5295 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5296 PACKET_ConditionalBreakpoints
},
5297 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5298 PACKET_BreakpointCommands
},
5299 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5300 PACKET_FastTracepoints
},
5301 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5302 PACKET_StaticTracepoints
},
5303 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5304 PACKET_InstallInTrace
},
5305 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5306 PACKET_DisconnectedTracing_feature
},
5307 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5309 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5311 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5312 PACKET_TracepointSource
},
5313 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5315 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5316 PACKET_EnableDisableTracepoints_feature
},
5317 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5318 PACKET_qXfer_fdpic
},
5319 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5321 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5322 PACKET_QDisableRandomization
},
5323 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5324 { "QTBuffer:size", PACKET_DISABLE
,
5325 remote_supported_packet
, PACKET_QTBuffer_size
},
5326 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5327 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5328 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5329 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5330 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5331 PACKET_qXfer_btrace
},
5332 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5333 PACKET_qXfer_btrace_conf
},
5334 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5335 PACKET_Qbtrace_conf_bts_size
},
5336 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5337 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5338 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5339 PACKET_fork_event_feature
},
5340 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5341 PACKET_vfork_event_feature
},
5342 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5343 PACKET_exec_event_feature
},
5344 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5345 PACKET_Qbtrace_conf_pt_size
},
5346 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5347 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5348 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5349 { "memory-tagging", PACKET_DISABLE
, remote_supported_packet
,
5350 PACKET_memory_tagging_feature
},
5353 static char *remote_support_xml
;
5355 /* Register string appended to "xmlRegisters=" in qSupported query. */
5358 register_remote_support_xml (const char *xml
)
5360 #if defined(HAVE_LIBEXPAT)
5361 if (remote_support_xml
== NULL
)
5362 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5365 char *copy
= xstrdup (remote_support_xml
+ 13);
5367 char *p
= strtok_r (copy
, ",", &saveptr
);
5371 if (strcmp (p
, xml
) == 0)
5378 while ((p
= strtok_r (NULL
, ",", &saveptr
)) != NULL
);
5381 remote_support_xml
= reconcat (remote_support_xml
,
5382 remote_support_xml
, ",", xml
,
5389 remote_query_supported_append (std::string
*msg
, const char *append
)
5393 msg
->append (append
);
5397 remote_target::remote_query_supported ()
5399 struct remote_state
*rs
= get_remote_state ();
5402 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5404 /* The packet support flags are handled differently for this packet
5405 than for most others. We treat an error, a disabled packet, and
5406 an empty response identically: any features which must be reported
5407 to be used will be automatically disabled. An empty buffer
5408 accomplishes this, since that is also the representation for a list
5409 containing no features. */
5412 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5416 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5417 remote_query_supported_append (&q
, "multiprocess+");
5419 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5420 remote_query_supported_append (&q
, "swbreak+");
5421 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5422 remote_query_supported_append (&q
, "hwbreak+");
5424 remote_query_supported_append (&q
, "qRelocInsn+");
5426 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5427 != AUTO_BOOLEAN_FALSE
)
5428 remote_query_supported_append (&q
, "fork-events+");
5429 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5430 != AUTO_BOOLEAN_FALSE
)
5431 remote_query_supported_append (&q
, "vfork-events+");
5432 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5433 != AUTO_BOOLEAN_FALSE
)
5434 remote_query_supported_append (&q
, "exec-events+");
5436 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5437 remote_query_supported_append (&q
, "vContSupported+");
5439 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5440 remote_query_supported_append (&q
, "QThreadEvents+");
5442 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5443 remote_query_supported_append (&q
, "no-resumed+");
5445 if (packet_set_cmd_state (PACKET_memory_tagging_feature
)
5446 != AUTO_BOOLEAN_FALSE
)
5447 remote_query_supported_append (&q
, "memory-tagging+");
5449 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5450 the qSupported:xmlRegisters=i386 handling. */
5451 if (remote_support_xml
!= NULL
5452 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5453 remote_query_supported_append (&q
, remote_support_xml
);
5455 q
= "qSupported:" + q
;
5456 putpkt (q
.c_str ());
5458 getpkt (&rs
->buf
, 0);
5460 /* If an error occured, warn, but do not return - just reset the
5461 buffer to empty and go on to disable features. */
5462 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5465 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5470 memset (seen
, 0, sizeof (seen
));
5472 next
= rs
->buf
.data ();
5475 enum packet_support is_supported
;
5476 char *p
, *end
, *name_end
, *value
;
5478 /* First separate out this item from the rest of the packet. If
5479 there's another item after this, we overwrite the separator
5480 (terminated strings are much easier to work with). */
5482 end
= strchr (p
, ';');
5485 end
= p
+ strlen (p
);
5495 warning (_("empty item in \"qSupported\" response"));
5500 name_end
= strchr (p
, '=');
5503 /* This is a name=value entry. */
5504 is_supported
= PACKET_ENABLE
;
5505 value
= name_end
+ 1;
5514 is_supported
= PACKET_ENABLE
;
5518 is_supported
= PACKET_DISABLE
;
5522 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5526 warning (_("unrecognized item \"%s\" "
5527 "in \"qSupported\" response"), p
);
5533 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5534 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5536 const struct protocol_feature
*feature
;
5539 feature
= &remote_protocol_features
[i
];
5540 feature
->func (this, feature
, is_supported
, value
);
5545 /* If we increased the packet size, make sure to increase the global
5546 buffer size also. We delay this until after parsing the entire
5547 qSupported packet, because this is the same buffer we were
5549 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5550 rs
->buf
.resize (rs
->explicit_packet_size
);
5552 /* Handle the defaults for unmentioned features. */
5553 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5556 const struct protocol_feature
*feature
;
5558 feature
= &remote_protocol_features
[i
];
5559 feature
->func (this, feature
, feature
->default_support
, NULL
);
5563 /* Serial QUIT handler for the remote serial descriptor.
5565 Defers handling a Ctrl-C until we're done with the current
5566 command/response packet sequence, unless:
5568 - We're setting up the connection. Don't send a remote interrupt
5569 request, as we're not fully synced yet. Quit immediately
5572 - The target has been resumed in the foreground
5573 (target_terminal::is_ours is false) with a synchronous resume
5574 packet, and we're blocked waiting for the stop reply, thus a
5575 Ctrl-C should be immediately sent to the target.
5577 - We get a second Ctrl-C while still within the same serial read or
5578 write. In that case the serial is seemingly wedged --- offer to
5581 - We see a second Ctrl-C without target response, after having
5582 previously interrupted the target. In that case the target/stub
5583 is probably wedged --- offer to quit/disconnect.
5587 remote_target::remote_serial_quit_handler ()
5589 struct remote_state
*rs
= get_remote_state ();
5591 if (check_quit_flag ())
5593 /* If we're starting up, we're not fully synced yet. Quit
5595 if (rs
->starting_up
)
5597 else if (rs
->got_ctrlc_during_io
)
5599 if (query (_("The target is not responding to GDB commands.\n"
5600 "Stop debugging it? ")))
5601 remote_unpush_and_throw (this);
5603 /* If ^C has already been sent once, offer to disconnect. */
5604 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5606 /* All-stop protocol, and blocked waiting for stop reply. Send
5607 an interrupt request. */
5608 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5609 target_interrupt ();
5611 rs
->got_ctrlc_during_io
= 1;
5615 /* The remote_target that is current while the quit handler is
5616 overridden with remote_serial_quit_handler. */
5617 static remote_target
*curr_quit_handler_target
;
5620 remote_serial_quit_handler ()
5622 curr_quit_handler_target
->remote_serial_quit_handler ();
5625 /* Remove the remote target from the target stack of each inferior
5626 that is using it. Upper targets depend on it so remove them
5630 remote_unpush_target (remote_target
*target
)
5632 /* We have to unpush the target from all inferiors, even those that
5634 scoped_restore_current_inferior restore_current_inferior
;
5636 for (inferior
*inf
: all_inferiors (target
))
5638 switch_to_inferior_no_thread (inf
);
5639 pop_all_targets_at_and_above (process_stratum
);
5640 generic_mourn_inferior ();
5643 /* Don't rely on target_close doing this when the target is popped
5644 from the last remote inferior above, because something may be
5645 holding a reference to the target higher up on the stack, meaning
5646 target_close won't be called yet. We lost the connection to the
5647 target, so clear these now, otherwise we may later throw
5648 TARGET_CLOSE_ERROR while trying to tell the remote target to
5650 fileio_handles_invalidate_target (target
);
5654 remote_unpush_and_throw (remote_target
*target
)
5656 remote_unpush_target (target
);
5657 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5661 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5663 remote_target
*curr_remote
= get_current_remote_target ();
5666 error (_("To open a remote debug connection, you need to specify what\n"
5667 "serial device is attached to the remote system\n"
5668 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5670 /* If we're connected to a running target, target_preopen will kill it.
5671 Ask this question first, before target_preopen has a chance to kill
5673 if (curr_remote
!= NULL
&& !target_has_execution ())
5676 && !query (_("Already connected to a remote target. Disconnect? ")))
5677 error (_("Still connected."));
5680 /* Here the possibly existing remote target gets unpushed. */
5681 target_preopen (from_tty
);
5683 remote_fileio_reset ();
5684 reopen_exec_file ();
5687 remote_target
*remote
5688 = (extended_p
? new extended_remote_target () : new remote_target ());
5689 target_ops_up
target_holder (remote
);
5691 remote_state
*rs
= remote
->get_remote_state ();
5693 /* See FIXME above. */
5694 if (!target_async_permitted
)
5695 rs
->wait_forever_enabled_p
= 1;
5697 rs
->remote_desc
= remote_serial_open (name
);
5698 if (!rs
->remote_desc
)
5699 perror_with_name (name
);
5701 if (baud_rate
!= -1)
5703 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5705 /* The requested speed could not be set. Error out to
5706 top level after closing remote_desc. Take care to
5707 set remote_desc to NULL to avoid closing remote_desc
5709 serial_close (rs
->remote_desc
);
5710 rs
->remote_desc
= NULL
;
5711 perror_with_name (name
);
5715 serial_setparity (rs
->remote_desc
, serial_parity
);
5716 serial_raw (rs
->remote_desc
);
5718 /* If there is something sitting in the buffer we might take it as a
5719 response to a command, which would be bad. */
5720 serial_flush_input (rs
->remote_desc
);
5724 puts_filtered ("Remote debugging using ");
5725 puts_filtered (name
);
5726 puts_filtered ("\n");
5729 /* Switch to using the remote target now. */
5730 current_inferior ()->push_target (std::move (target_holder
));
5732 /* Register extra event sources in the event loop. */
5733 rs
->remote_async_inferior_event_token
5734 = create_async_event_handler (remote_async_inferior_event_handler
, nullptr,
5736 rs
->notif_state
= remote_notif_state_allocate (remote
);
5738 /* Reset the target state; these things will be queried either by
5739 remote_query_supported or as they are needed. */
5740 reset_all_packet_configs_support ();
5741 rs
->cached_wait_status
= 0;
5742 rs
->explicit_packet_size
= 0;
5744 rs
->extended
= extended_p
;
5745 rs
->waiting_for_stop_reply
= 0;
5746 rs
->ctrlc_pending_p
= 0;
5747 rs
->got_ctrlc_during_io
= 0;
5749 rs
->general_thread
= not_sent_ptid
;
5750 rs
->continue_thread
= not_sent_ptid
;
5751 rs
->remote_traceframe_number
= -1;
5753 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5755 /* Probe for ability to use "ThreadInfo" query, as required. */
5756 rs
->use_threadinfo_query
= 1;
5757 rs
->use_threadextra_query
= 1;
5759 rs
->readahead_cache
.invalidate ();
5761 if (target_async_permitted
)
5763 /* FIXME: cagney/1999-09-23: During the initial connection it is
5764 assumed that the target is already ready and able to respond to
5765 requests. Unfortunately remote_start_remote() eventually calls
5766 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5767 around this. Eventually a mechanism that allows
5768 wait_for_inferior() to expect/get timeouts will be
5770 rs
->wait_forever_enabled_p
= 0;
5773 /* First delete any symbols previously loaded from shared libraries. */
5774 no_shared_libraries (NULL
, 0);
5776 /* Start the remote connection. If error() or QUIT, discard this
5777 target (we'd otherwise be in an inconsistent state) and then
5778 propogate the error on up the exception chain. This ensures that
5779 the caller doesn't stumble along blindly assuming that the
5780 function succeeded. The CLI doesn't have this problem but other
5781 UI's, such as MI do.
5783 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5784 this function should return an error indication letting the
5785 caller restore the previous state. Unfortunately the command
5786 ``target remote'' is directly wired to this function making that
5787 impossible. On a positive note, the CLI side of this problem has
5788 been fixed - the function set_cmd_context() makes it possible for
5789 all the ``target ....'' commands to share a common callback
5790 function. See cli-dump.c. */
5795 remote
->start_remote (from_tty
, extended_p
);
5797 catch (const gdb_exception
&ex
)
5799 /* Pop the partially set up target - unless something else did
5800 already before throwing the exception. */
5801 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5802 remote_unpush_target (remote
);
5807 remote_btrace_reset (rs
);
5809 if (target_async_permitted
)
5810 rs
->wait_forever_enabled_p
= 1;
5813 /* Detach the specified process. */
5816 remote_target::remote_detach_pid (int pid
)
5818 struct remote_state
*rs
= get_remote_state ();
5820 /* This should not be necessary, but the handling for D;PID in
5821 GDBserver versions prior to 8.2 incorrectly assumes that the
5822 selected process points to the same process we're detaching,
5823 leading to misbehavior (and possibly GDBserver crashing) when it
5824 does not. Since it's easy and cheap, work around it by forcing
5825 GDBserver to select GDB's current process. */
5826 set_general_process ();
5828 if (remote_multi_process_p (rs
))
5829 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5831 strcpy (rs
->buf
.data (), "D");
5834 getpkt (&rs
->buf
, 0);
5836 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5838 else if (rs
->buf
[0] == '\0')
5839 error (_("Remote doesn't know how to detach"));
5841 error (_("Can't detach process."));
5844 /* This detaches a program to which we previously attached, using
5845 inferior_ptid to identify the process. After this is done, GDB
5846 can be used to debug some other program. We better not have left
5847 any breakpoints in the target program or it'll die when it hits
5851 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5853 int pid
= inferior_ptid
.pid ();
5854 struct remote_state
*rs
= get_remote_state ();
5857 if (!target_has_execution ())
5858 error (_("No process to detach from."));
5860 target_announce_detach (from_tty
);
5862 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
5864 /* If we're in breakpoints-always-inserted mode, or the inferior
5865 is running, we have to remove breakpoints before detaching.
5866 We don't do this in common code instead because not all
5867 targets support removing breakpoints while the target is
5868 running. The remote target / gdbserver does, though. */
5869 remove_breakpoints_inf (current_inferior ());
5872 /* Tell the remote target to detach. */
5873 remote_detach_pid (pid
);
5875 /* Exit only if this is the only active inferior. */
5876 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors (this) == 1)
5877 puts_filtered (_("Ending remote debugging.\n"));
5879 thread_info
*tp
= find_thread_ptid (this, inferior_ptid
);
5881 /* Check to see if we are detaching a fork parent. Note that if we
5882 are detaching a fork child, tp == NULL. */
5883 is_fork_parent
= (tp
!= NULL
5884 && tp
->pending_follow
.kind () == TARGET_WAITKIND_FORKED
);
5886 /* If doing detach-on-fork, we don't mourn, because that will delete
5887 breakpoints that should be available for the followed inferior. */
5888 if (!is_fork_parent
)
5890 /* Save the pid as a string before mourning, since that will
5891 unpush the remote target, and we need the string after. */
5892 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5894 target_mourn_inferior (inferior_ptid
);
5895 if (print_inferior_events
)
5896 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5897 inf
->num
, infpid
.c_str ());
5901 switch_to_no_thread ();
5902 detach_inferior (current_inferior ());
5907 remote_target::detach (inferior
*inf
, int from_tty
)
5909 remote_detach_1 (inf
, from_tty
);
5913 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5915 remote_detach_1 (inf
, from_tty
);
5918 /* Target follow-fork function for remote targets. On entry, and
5919 at return, the current inferior is the fork parent.
5921 Note that although this is currently only used for extended-remote,
5922 it is named remote_follow_fork in anticipation of using it for the
5923 remote target as well. */
5926 remote_target::follow_fork (inferior
*child_inf
, ptid_t child_ptid
,
5927 target_waitkind fork_kind
, bool follow_child
,
5930 process_stratum_target::follow_fork (child_inf
, child_ptid
,
5931 fork_kind
, follow_child
, detach_fork
);
5933 struct remote_state
*rs
= get_remote_state ();
5935 if ((fork_kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5936 || (fork_kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5938 /* When following the parent and detaching the child, we detach
5939 the child here. For the case of following the child and
5940 detaching the parent, the detach is done in the target-
5941 independent follow fork code in infrun.c. We can't use
5942 target_detach when detaching an unfollowed child because
5943 the client side doesn't know anything about the child. */
5944 if (detach_fork
&& !follow_child
)
5946 /* Detach the fork child. */
5947 remote_detach_pid (child_ptid
.pid ());
5952 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5953 in the program space of the new inferior. */
5956 remote_target::follow_exec (inferior
*follow_inf
, ptid_t ptid
,
5957 const char *execd_pathname
)
5959 process_stratum_target::follow_exec (follow_inf
, ptid
, execd_pathname
);
5961 /* We know that this is a target file name, so if it has the "target:"
5962 prefix we strip it off before saving it in the program space. */
5963 if (is_target_filename (execd_pathname
))
5964 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5966 set_pspace_remote_exec_file (follow_inf
->pspace
, execd_pathname
);
5969 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5972 remote_target::disconnect (const char *args
, int from_tty
)
5975 error (_("Argument given to \"disconnect\" when remotely debugging."));
5977 /* Make sure we unpush even the extended remote targets. Calling
5978 target_mourn_inferior won't unpush, and
5979 remote_target::mourn_inferior won't unpush if there is more than
5980 one inferior left. */
5981 remote_unpush_target (this);
5984 puts_filtered ("Ending remote debugging.\n");
5987 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5988 be chatty about it. */
5991 extended_remote_target::attach (const char *args
, int from_tty
)
5993 struct remote_state
*rs
= get_remote_state ();
5995 char *wait_status
= NULL
;
5997 pid
= parse_pid_to_attach (args
);
5999 /* Remote PID can be freely equal to getpid, do not check it here the same
6000 way as in other targets. */
6002 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
6003 error (_("This target does not support attaching to a process"));
6007 const char *exec_file
= get_exec_file (0);
6010 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
6011 target_pid_to_str (ptid_t (pid
)).c_str ());
6013 printf_unfiltered (_("Attaching to %s\n"),
6014 target_pid_to_str (ptid_t (pid
)).c_str ());
6017 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
6019 getpkt (&rs
->buf
, 0);
6021 switch (packet_ok (rs
->buf
,
6022 &remote_protocol_packets
[PACKET_vAttach
]))
6025 if (!target_is_non_stop_p ())
6027 /* Save the reply for later. */
6028 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
6029 strcpy (wait_status
, rs
->buf
.data ());
6031 else if (strcmp (rs
->buf
.data (), "OK") != 0)
6032 error (_("Attaching to %s failed with: %s"),
6033 target_pid_to_str (ptid_t (pid
)).c_str (),
6036 case PACKET_UNKNOWN
:
6037 error (_("This target does not support attaching to a process"));
6039 error (_("Attaching to %s failed"),
6040 target_pid_to_str (ptid_t (pid
)).c_str ());
6043 switch_to_inferior_no_thread (remote_add_inferior (false, pid
, 1, 0));
6045 inferior_ptid
= ptid_t (pid
);
6047 if (target_is_non_stop_p ())
6049 /* Get list of threads. */
6050 update_thread_list ();
6052 thread_info
*thread
= first_thread_of_inferior (current_inferior ());
6053 if (thread
!= nullptr)
6054 switch_to_thread (thread
);
6056 /* Invalidate our notion of the remote current thread. */
6057 record_currthread (rs
, minus_one_ptid
);
6061 /* Now, if we have thread information, update the main thread's
6063 ptid_t curr_ptid
= remote_current_thread (ptid_t (pid
));
6065 /* Add the main thread to the thread list. */
6066 thread_info
*thr
= add_thread_silent (this, curr_ptid
);
6068 switch_to_thread (thr
);
6070 /* Don't consider the thread stopped until we've processed the
6071 saved stop reply. */
6072 set_executing (this, thr
->ptid
, true);
6075 /* Next, if the target can specify a description, read it. We do
6076 this before anything involving memory or registers. */
6077 target_find_description ();
6079 if (!target_is_non_stop_p ())
6081 /* Use the previously fetched status. */
6082 gdb_assert (wait_status
!= NULL
);
6084 if (target_can_async_p ())
6086 struct notif_event
*reply
6087 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
6089 push_stop_reply ((struct stop_reply
*) reply
);
6095 gdb_assert (wait_status
!= NULL
);
6096 strcpy (rs
->buf
.data (), wait_status
);
6097 rs
->cached_wait_status
= 1;
6102 gdb_assert (wait_status
== NULL
);
6104 gdb_assert (target_can_async_p ());
6109 /* Implementation of the to_post_attach method. */
6112 extended_remote_target::post_attach (int pid
)
6114 /* Get text, data & bss offsets. */
6117 /* In certain cases GDB might not have had the chance to start
6118 symbol lookup up until now. This could happen if the debugged
6119 binary is not using shared libraries, the vsyscall page is not
6120 present (on Linux) and the binary itself hadn't changed since the
6121 debugging process was started. */
6122 if (current_program_space
->symfile_object_file
!= NULL
)
6123 remote_check_symbols();
6127 /* Check for the availability of vCont. This function should also check
6131 remote_target::remote_vcont_probe ()
6133 remote_state
*rs
= get_remote_state ();
6136 strcpy (rs
->buf
.data (), "vCont?");
6138 getpkt (&rs
->buf
, 0);
6139 buf
= rs
->buf
.data ();
6141 /* Make sure that the features we assume are supported. */
6142 if (startswith (buf
, "vCont"))
6145 int support_c
, support_C
;
6147 rs
->supports_vCont
.s
= 0;
6148 rs
->supports_vCont
.S
= 0;
6151 rs
->supports_vCont
.t
= 0;
6152 rs
->supports_vCont
.r
= 0;
6153 while (p
&& *p
== ';')
6156 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6157 rs
->supports_vCont
.s
= 1;
6158 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6159 rs
->supports_vCont
.S
= 1;
6160 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6162 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6164 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6165 rs
->supports_vCont
.t
= 1;
6166 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6167 rs
->supports_vCont
.r
= 1;
6169 p
= strchr (p
, ';');
6172 /* If c, and C are not all supported, we can't use vCont. Clearing
6173 BUF will make packet_ok disable the packet. */
6174 if (!support_c
|| !support_C
)
6178 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
6179 rs
->supports_vCont_probed
= true;
6182 /* Helper function for building "vCont" resumptions. Write a
6183 resumption to P. ENDP points to one-passed-the-end of the buffer
6184 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6185 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6186 resumed thread should be single-stepped and/or signalled. If PTID
6187 equals minus_one_ptid, then all threads are resumed; if PTID
6188 represents a process, then all threads of the process are resumed;
6189 the thread to be stepped and/or signalled is given in the global
6193 remote_target::append_resumption (char *p
, char *endp
,
6194 ptid_t ptid
, int step
, gdb_signal siggnal
)
6196 struct remote_state
*rs
= get_remote_state ();
6198 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6199 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6201 /* GDB is willing to range step. */
6202 && use_range_stepping
6203 /* Target supports range stepping. */
6204 && rs
->supports_vCont
.r
6205 /* We don't currently support range stepping multiple
6206 threads with a wildcard (though the protocol allows it,
6207 so stubs shouldn't make an active effort to forbid
6209 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6211 struct thread_info
*tp
;
6213 if (ptid
== minus_one_ptid
)
6215 /* If we don't know about the target thread's tid, then
6216 we're resuming magic_null_ptid (see caller). */
6217 tp
= find_thread_ptid (this, magic_null_ptid
);
6220 tp
= find_thread_ptid (this, ptid
);
6221 gdb_assert (tp
!= NULL
);
6223 if (tp
->control
.may_range_step
)
6225 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6227 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6228 phex_nz (tp
->control
.step_range_start
,
6230 phex_nz (tp
->control
.step_range_end
,
6234 p
+= xsnprintf (p
, endp
- p
, ";s");
6237 p
+= xsnprintf (p
, endp
- p
, ";s");
6238 else if (siggnal
!= GDB_SIGNAL_0
)
6239 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6241 p
+= xsnprintf (p
, endp
- p
, ";c");
6243 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6247 /* All (-1) threads of process. */
6248 nptid
= ptid_t (ptid
.pid (), -1);
6250 p
+= xsnprintf (p
, endp
- p
, ":");
6251 p
= write_ptid (p
, endp
, nptid
);
6253 else if (ptid
!= minus_one_ptid
)
6255 p
+= xsnprintf (p
, endp
- p
, ":");
6256 p
= write_ptid (p
, endp
, ptid
);
6262 /* Clear the thread's private info on resume. */
6265 resume_clear_thread_private_info (struct thread_info
*thread
)
6267 if (thread
->priv
!= NULL
)
6269 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6271 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6272 priv
->watch_data_address
= 0;
6276 /* Append a vCont continue-with-signal action for threads that have a
6277 non-zero stop signal. */
6280 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6283 for (thread_info
*thread
: all_non_exited_threads (this, ptid
))
6284 if (inferior_ptid
!= thread
->ptid
6285 && thread
->stop_signal () != GDB_SIGNAL_0
)
6287 p
= append_resumption (p
, endp
, thread
->ptid
,
6288 0, thread
->stop_signal ());
6289 thread
->set_stop_signal (GDB_SIGNAL_0
);
6290 resume_clear_thread_private_info (thread
);
6296 /* Set the target running, using the packets that use Hc
6300 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6303 struct remote_state
*rs
= get_remote_state ();
6306 rs
->last_sent_signal
= siggnal
;
6307 rs
->last_sent_step
= step
;
6309 /* The c/s/C/S resume packets use Hc, so set the continue
6311 if (ptid
== minus_one_ptid
)
6312 set_continue_thread (any_thread_ptid
);
6314 set_continue_thread (ptid
);
6316 for (thread_info
*thread
: all_non_exited_threads (this))
6317 resume_clear_thread_private_info (thread
);
6319 buf
= rs
->buf
.data ();
6320 if (::execution_direction
== EXEC_REVERSE
)
6322 /* We don't pass signals to the target in reverse exec mode. */
6323 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6324 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6327 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6328 error (_("Remote reverse-step not supported."));
6329 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6330 error (_("Remote reverse-continue not supported."));
6332 strcpy (buf
, step
? "bs" : "bc");
6334 else if (siggnal
!= GDB_SIGNAL_0
)
6336 buf
[0] = step
? 'S' : 'C';
6337 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6338 buf
[2] = tohex (((int) siggnal
) & 0xf);
6342 strcpy (buf
, step
? "s" : "c");
6347 /* Resume the remote inferior by using a "vCont" packet. The thread
6348 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6349 resumed thread should be single-stepped and/or signalled. If PTID
6350 equals minus_one_ptid, then all threads are resumed; the thread to
6351 be stepped and/or signalled is given in the global INFERIOR_PTID.
6352 This function returns non-zero iff it resumes the inferior.
6354 This function issues a strict subset of all possible vCont commands
6358 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6359 enum gdb_signal siggnal
)
6361 struct remote_state
*rs
= get_remote_state ();
6365 /* No reverse execution actions defined for vCont. */
6366 if (::execution_direction
== EXEC_REVERSE
)
6369 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6370 remote_vcont_probe ();
6372 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6375 p
= rs
->buf
.data ();
6376 endp
= p
+ get_remote_packet_size ();
6378 /* If we could generate a wider range of packets, we'd have to worry
6379 about overflowing BUF. Should there be a generic
6380 "multi-part-packet" packet? */
6382 p
+= xsnprintf (p
, endp
- p
, "vCont");
6384 if (ptid
== magic_null_ptid
)
6386 /* MAGIC_NULL_PTID means that we don't have any active threads,
6387 so we don't have any TID numbers the inferior will
6388 understand. Make sure to only send forms that do not specify
6390 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6392 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6394 /* Resume all threads (of all processes, or of a single
6395 process), with preference for INFERIOR_PTID. This assumes
6396 inferior_ptid belongs to the set of all threads we are about
6398 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6400 /* Step inferior_ptid, with or without signal. */
6401 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6404 /* Also pass down any pending signaled resumption for other
6405 threads not the current. */
6406 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6408 /* And continue others without a signal. */
6409 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6413 /* Scheduler locking; resume only PTID. */
6414 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6417 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6420 if (target_is_non_stop_p ())
6422 /* In non-stop, the stub replies to vCont with "OK". The stop
6423 reply will be reported asynchronously by means of a `%Stop'
6425 getpkt (&rs
->buf
, 0);
6426 if (strcmp (rs
->buf
.data (), "OK") != 0)
6427 error (_("Unexpected vCont reply in non-stop mode: %s"),
6434 /* Tell the remote machine to resume. */
6437 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6439 struct remote_state
*rs
= get_remote_state ();
6441 /* When connected in non-stop mode, the core resumes threads
6442 individually. Resuming remote threads directly in target_resume
6443 would thus result in sending one packet per thread. Instead, to
6444 minimize roundtrip latency, here we just store the resume
6445 request (put the thread in RESUMED_PENDING_VCONT state); the actual remote
6446 resumption will be done in remote_target::commit_resume, where we'll be
6447 able to do vCont action coalescing. */
6448 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6450 remote_thread_info
*remote_thr
;
6452 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6453 remote_thr
= get_remote_thread_info (this, inferior_ptid
);
6455 remote_thr
= get_remote_thread_info (this, ptid
);
6457 /* We don't expect the core to ask to resume an already resumed (from
6458 its point of view) thread. */
6459 gdb_assert (remote_thr
->get_resume_state () == resume_state::NOT_RESUMED
);
6461 remote_thr
->set_resumed_pending_vcont (step
, siggnal
);
6465 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6466 (explained in remote-notif.c:handle_notification) so
6467 remote_notif_process is not called. We need find a place where
6468 it is safe to start a 'vNotif' sequence. It is good to do it
6469 before resuming inferior, because inferior was stopped and no RSP
6470 traffic at that moment. */
6471 if (!target_is_non_stop_p ())
6472 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6474 rs
->last_resume_exec_dir
= ::execution_direction
;
6476 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6477 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6478 remote_resume_with_hc (ptid
, step
, siggnal
);
6480 /* Update resumed state tracked by the remote target. */
6481 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6482 get_remote_thread_info (tp
)->set_resumed ();
6484 /* We are about to start executing the inferior, let's register it
6485 with the event loop. NOTE: this is the one place where all the
6486 execution commands end up. We could alternatively do this in each
6487 of the execution commands in infcmd.c. */
6488 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6489 into infcmd.c in order to allow inferior function calls to work
6490 NOT asynchronously. */
6491 if (target_can_async_p ())
6494 /* We've just told the target to resume. The remote server will
6495 wait for the inferior to stop, and then send a stop reply. In
6496 the mean time, we can't start another command/query ourselves
6497 because the stub wouldn't be ready to process it. This applies
6498 only to the base all-stop protocol, however. In non-stop (which
6499 only supports vCont), the stub replies with an "OK", and is
6500 immediate able to process further serial input. */
6501 if (!target_is_non_stop_p ())
6502 rs
->waiting_for_stop_reply
= 1;
6505 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6507 /* Private per-inferior info for target remote processes. */
6509 struct remote_inferior
: public private_inferior
6511 /* Whether we can send a wildcard vCont for this process. */
6512 bool may_wildcard_vcont
= true;
6515 /* Get the remote private inferior data associated to INF. */
6517 static remote_inferior
*
6518 get_remote_inferior (inferior
*inf
)
6520 if (inf
->priv
== NULL
)
6521 inf
->priv
.reset (new remote_inferior
);
6523 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6526 struct stop_reply
: public notif_event
6530 /* The identifier of the thread about this event */
6533 /* The remote state this event is associated with. When the remote
6534 connection, represented by a remote_state object, is closed,
6535 all the associated stop_reply events should be released. */
6536 struct remote_state
*rs
;
6538 struct target_waitstatus ws
;
6540 /* The architecture associated with the expedited registers. */
6543 /* Expedited registers. This makes remote debugging a bit more
6544 efficient for those targets that provide critical registers as
6545 part of their normal status mechanism (as another roundtrip to
6546 fetch them is avoided). */
6547 std::vector
<cached_reg_t
> regcache
;
6549 enum target_stop_reason stop_reason
;
6551 CORE_ADDR watch_data_address
;
6556 /* Class used to track the construction of a vCont packet in the
6557 outgoing packet buffer. This is used to send multiple vCont
6558 packets if we have more actions than would fit a single packet. */
6563 explicit vcont_builder (remote_target
*remote
)
6570 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6575 /* The remote target. */
6576 remote_target
*m_remote
;
6578 /* Pointer to the first action. P points here if no action has been
6580 char *m_first_action
;
6582 /* Where the next action will be appended. */
6585 /* The end of the buffer. Must never write past this. */
6589 /* Prepare the outgoing buffer for a new vCont packet. */
6592 vcont_builder::restart ()
6594 struct remote_state
*rs
= m_remote
->get_remote_state ();
6596 m_p
= rs
->buf
.data ();
6597 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6598 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6599 m_first_action
= m_p
;
6602 /* If the vCont packet being built has any action, send it to the
6606 vcont_builder::flush ()
6608 struct remote_state
*rs
;
6610 if (m_p
== m_first_action
)
6613 rs
= m_remote
->get_remote_state ();
6614 m_remote
->putpkt (rs
->buf
);
6615 m_remote
->getpkt (&rs
->buf
, 0);
6616 if (strcmp (rs
->buf
.data (), "OK") != 0)
6617 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6620 /* The largest action is range-stepping, with its two addresses. This
6621 is more than sufficient. If a new, bigger action is created, it'll
6622 quickly trigger a failed assertion in append_resumption (and we'll
6624 #define MAX_ACTION_SIZE 200
6626 /* Append a new vCont action in the outgoing packet being built. If
6627 the action doesn't fit the packet along with previous actions, push
6628 what we've got so far to the remote end and start over a new vCont
6629 packet (with the new action). */
6632 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6634 char buf
[MAX_ACTION_SIZE
+ 1];
6636 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6637 ptid
, step
, siggnal
);
6639 /* Check whether this new action would fit in the vCont packet along
6640 with previous actions. If not, send what we've got so far and
6641 start a new vCont packet. */
6642 size_t rsize
= endp
- buf
;
6643 if (rsize
> m_endp
- m_p
)
6648 /* Should now fit. */
6649 gdb_assert (rsize
<= m_endp
- m_p
);
6652 memcpy (m_p
, buf
, rsize
);
6657 /* to_commit_resume implementation. */
6660 remote_target::commit_resumed ()
6662 /* If connected in all-stop mode, we'd send the remote resume
6663 request directly from remote_resume. Likewise if
6664 reverse-debugging, as there are no defined vCont actions for
6665 reverse execution. */
6666 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6669 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6670 instead of resuming all threads of each process individually.
6671 However, if any thread of a process must remain halted, we can't
6672 send wildcard resumes and must send one action per thread.
6674 Care must be taken to not resume threads/processes the server
6675 side already told us are stopped, but the core doesn't know about
6676 yet, because the events are still in the vStopped notification
6679 #1 => vCont s:p1.1;c
6681 #3 <= %Stopped T05 p1.1
6686 #8 (infrun handles the stop for p1.1 and continues stepping)
6687 #9 => vCont s:p1.1;c
6689 The last vCont above would resume thread p1.2 by mistake, because
6690 the server has no idea that the event for p1.2 had not been
6693 The server side must similarly ignore resume actions for the
6694 thread that has a pending %Stopped notification (and any other
6695 threads with events pending), until GDB acks the notification
6696 with vStopped. Otherwise, e.g., the following case is
6699 #1 => g (or any other packet)
6701 #3 <= %Stopped T05 p1.2
6702 #4 => vCont s:p1.1;c
6705 Above, the server must not resume thread p1.2. GDB can't know
6706 that p1.2 stopped until it acks the %Stopped notification, and
6707 since from GDB's perspective all threads should be running, it
6710 Finally, special care must also be given to handling fork/vfork
6711 events. A (v)fork event actually tells us that two processes
6712 stopped -- the parent and the child. Until we follow the fork,
6713 we must not resume the child. Therefore, if we have a pending
6714 fork follow, we must not send a global wildcard resume action
6715 (vCont;c). We can still send process-wide wildcards though. */
6717 /* Start by assuming a global wildcard (vCont;c) is possible. */
6718 bool may_global_wildcard_vcont
= true;
6720 /* And assume every process is individually wildcard-able too. */
6721 for (inferior
*inf
: all_non_exited_inferiors (this))
6723 remote_inferior
*priv
= get_remote_inferior (inf
);
6725 priv
->may_wildcard_vcont
= true;
6728 /* Check for any pending events (not reported or processed yet) and
6729 disable process and global wildcard resumes appropriately. */
6730 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6732 bool any_pending_vcont_resume
= false;
6734 for (thread_info
*tp
: all_non_exited_threads (this))
6736 remote_thread_info
*priv
= get_remote_thread_info (tp
);
6738 /* If a thread of a process is not meant to be resumed, then we
6739 can't wildcard that process. */
6740 if (priv
->get_resume_state () == resume_state::NOT_RESUMED
)
6742 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6744 /* And if we can't wildcard a process, we can't wildcard
6745 everything either. */
6746 may_global_wildcard_vcont
= false;
6750 if (priv
->get_resume_state () == resume_state::RESUMED_PENDING_VCONT
)
6751 any_pending_vcont_resume
= true;
6753 /* If a thread is the parent of an unfollowed fork, then we
6754 can't do a global wildcard, as that would resume the fork
6756 if (is_pending_fork_parent_thread (tp
))
6757 may_global_wildcard_vcont
= false;
6760 /* We didn't have any resumed thread pending a vCont resume, so nothing to
6762 if (!any_pending_vcont_resume
)
6765 /* Now let's build the vCont packet(s). Actions must be appended
6766 from narrower to wider scopes (thread -> process -> global). If
6767 we end up with too many actions for a single packet vcont_builder
6768 flushes the current vCont packet to the remote side and starts a
6770 struct vcont_builder
vcont_builder (this);
6772 /* Threads first. */
6773 for (thread_info
*tp
: all_non_exited_threads (this))
6775 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6777 /* If the thread was previously vCont-resumed, no need to send a specific
6778 action for it. If we didn't receive a resume request for it, don't
6779 send an action for it either. */
6780 if (remote_thr
->get_resume_state () != resume_state::RESUMED_PENDING_VCONT
)
6783 gdb_assert (!thread_is_in_step_over_chain (tp
));
6785 /* We should never be commit-resuming a thread that has a stop reply.
6786 Otherwise, we would end up reporting a stop event for a thread while
6787 it is running on the remote target. */
6788 remote_state
*rs
= get_remote_state ();
6789 for (const auto &stop_reply
: rs
->stop_reply_queue
)
6790 gdb_assert (stop_reply
->ptid
!= tp
->ptid
);
6792 const resumed_pending_vcont_info
&info
6793 = remote_thr
->resumed_pending_vcont_info ();
6795 /* Check if we need to send a specific action for this thread. If not,
6796 it will be included in a wildcard resume instead. */
6797 if (info
.step
|| info
.sig
!= GDB_SIGNAL_0
6798 || !get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6799 vcont_builder
.push_action (tp
->ptid
, info
.step
, info
.sig
);
6801 remote_thr
->set_resumed ();
6804 /* Now check whether we can send any process-wide wildcard. This is
6805 to avoid sending a global wildcard in the case nothing is
6806 supposed to be resumed. */
6807 bool any_process_wildcard
= false;
6809 for (inferior
*inf
: all_non_exited_inferiors (this))
6811 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6813 any_process_wildcard
= true;
6818 if (any_process_wildcard
)
6820 /* If all processes are wildcard-able, then send a single "c"
6821 action, otherwise, send an "all (-1) threads of process"
6822 continue action for each running process, if any. */
6823 if (may_global_wildcard_vcont
)
6825 vcont_builder
.push_action (minus_one_ptid
,
6826 false, GDB_SIGNAL_0
);
6830 for (inferior
*inf
: all_non_exited_inferiors (this))
6832 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6834 vcont_builder
.push_action (ptid_t (inf
->pid
),
6835 false, GDB_SIGNAL_0
);
6841 vcont_builder
.flush ();
6844 /* Implementation of target_has_pending_events. */
6847 remote_target::has_pending_events ()
6849 if (target_can_async_p ())
6851 remote_state
*rs
= get_remote_state ();
6853 if (async_event_handler_marked (rs
->remote_async_inferior_event_token
))
6856 /* Note that BUFCNT can be negative, indicating sticky
6858 if (rs
->remote_desc
->bufcnt
!= 0)
6866 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6867 thread, all threads of a remote process, or all threads of all
6871 remote_target::remote_stop_ns (ptid_t ptid
)
6873 struct remote_state
*rs
= get_remote_state ();
6874 char *p
= rs
->buf
.data ();
6875 char *endp
= p
+ get_remote_packet_size ();
6877 /* If any thread that needs to stop was resumed but pending a vCont
6878 resume, generate a phony stop_reply. However, first check
6879 whether the thread wasn't resumed with a signal. Generating a
6880 phony stop in that case would result in losing the signal. */
6881 bool needs_commit
= false;
6882 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6884 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6886 if (remote_thr
->get_resume_state ()
6887 == resume_state::RESUMED_PENDING_VCONT
)
6889 const resumed_pending_vcont_info
&info
6890 = remote_thr
->resumed_pending_vcont_info ();
6891 if (info
.sig
!= GDB_SIGNAL_0
)
6893 /* This signal must be forwarded to the inferior. We
6894 could commit-resume just this thread, but its simpler
6895 to just commit-resume everything. */
6896 needs_commit
= true;
6905 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6907 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6909 if (remote_thr
->get_resume_state ()
6910 == resume_state::RESUMED_PENDING_VCONT
)
6912 remote_debug_printf ("Enqueueing phony stop reply for thread pending "
6913 "vCont-resume (%d, %ld, %s)", tp
->ptid
.pid(),
6915 pulongest (tp
->ptid
.tid ()));
6917 /* Check that the thread wasn't resumed with a signal.
6918 Generating a phony stop would result in losing the
6920 const resumed_pending_vcont_info
&info
6921 = remote_thr
->resumed_pending_vcont_info ();
6922 gdb_assert (info
.sig
== GDB_SIGNAL_0
);
6924 stop_reply
*sr
= new stop_reply ();
6925 sr
->ptid
= tp
->ptid
;
6927 sr
->ws
.set_stopped (GDB_SIGNAL_0
);
6928 sr
->arch
= tp
->inf
->gdbarch
;
6929 sr
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6930 sr
->watch_data_address
= 0;
6932 this->push_stop_reply (sr
);
6934 /* Pretend that this thread was actually resumed on the
6935 remote target, then stopped. If we leave it in the
6936 RESUMED_PENDING_VCONT state and the commit_resumed
6937 method is called while the stop reply is still in the
6938 queue, we'll end up reporting a stop event to the core
6939 for that thread while it is running on the remote
6940 target... that would be bad. */
6941 remote_thr
->set_resumed ();
6945 /* FIXME: This supports_vCont_probed check is a workaround until
6946 packet_support is per-connection. */
6947 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6948 || !rs
->supports_vCont_probed
)
6949 remote_vcont_probe ();
6951 if (!rs
->supports_vCont
.t
)
6952 error (_("Remote server does not support stopping threads"));
6954 if (ptid
== minus_one_ptid
6955 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6956 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6961 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6964 /* All (-1) threads of process. */
6965 nptid
= ptid_t (ptid
.pid (), -1);
6968 /* Small optimization: if we already have a stop reply for
6969 this thread, no use in telling the stub we want this
6971 if (peek_stop_reply (ptid
))
6977 write_ptid (p
, endp
, nptid
);
6980 /* In non-stop, we get an immediate OK reply. The stop reply will
6981 come in asynchronously by notification. */
6983 getpkt (&rs
->buf
, 0);
6984 if (strcmp (rs
->buf
.data (), "OK") != 0)
6985 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6989 /* All-stop version of target_interrupt. Sends a break or a ^C to
6990 interrupt the remote target. It is undefined which thread of which
6991 process reports the interrupt. */
6994 remote_target::remote_interrupt_as ()
6996 struct remote_state
*rs
= get_remote_state ();
6998 rs
->ctrlc_pending_p
= 1;
7000 /* If the inferior is stopped already, but the core didn't know
7001 about it yet, just ignore the request. The cached wait status
7002 will be collected in remote_wait. */
7003 if (rs
->cached_wait_status
)
7006 /* Send interrupt_sequence to remote target. */
7007 send_interrupt_sequence ();
7010 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
7011 the remote target. It is undefined which thread of which process
7012 reports the interrupt. Throws an error if the packet is not
7013 supported by the server. */
7016 remote_target::remote_interrupt_ns ()
7018 struct remote_state
*rs
= get_remote_state ();
7019 char *p
= rs
->buf
.data ();
7020 char *endp
= p
+ get_remote_packet_size ();
7022 xsnprintf (p
, endp
- p
, "vCtrlC");
7024 /* In non-stop, we get an immediate OK reply. The stop reply will
7025 come in asynchronously by notification. */
7027 getpkt (&rs
->buf
, 0);
7029 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
7033 case PACKET_UNKNOWN
:
7034 error (_("No support for interrupting the remote target."));
7036 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
7040 /* Implement the to_stop function for the remote targets. */
7043 remote_target::stop (ptid_t ptid
)
7045 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7047 if (target_is_non_stop_p ())
7048 remote_stop_ns (ptid
);
7051 /* We don't currently have a way to transparently pause the
7052 remote target in all-stop mode. Interrupt it instead. */
7053 remote_interrupt_as ();
7057 /* Implement the to_interrupt function for the remote targets. */
7060 remote_target::interrupt ()
7062 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7064 if (target_is_non_stop_p ())
7065 remote_interrupt_ns ();
7067 remote_interrupt_as ();
7070 /* Implement the to_pass_ctrlc function for the remote targets. */
7073 remote_target::pass_ctrlc ()
7075 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7077 struct remote_state
*rs
= get_remote_state ();
7079 /* If we're starting up, we're not fully synced yet. Quit
7081 if (rs
->starting_up
)
7083 /* If ^C has already been sent once, offer to disconnect. */
7084 else if (rs
->ctrlc_pending_p
)
7087 target_interrupt ();
7090 /* Ask the user what to do when an interrupt is received. */
7093 remote_target::interrupt_query ()
7095 struct remote_state
*rs
= get_remote_state ();
7097 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
7099 if (query (_("The target is not responding to interrupt requests.\n"
7100 "Stop debugging it? ")))
7102 remote_unpush_target (this);
7103 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
7108 if (query (_("Interrupted while waiting for the program.\n"
7109 "Give up waiting? ")))
7114 /* Enable/disable target terminal ownership. Most targets can use
7115 terminal groups to control terminal ownership. Remote targets are
7116 different in that explicit transfer of ownership to/from GDB/target
7120 remote_target::terminal_inferior ()
7122 /* NOTE: At this point we could also register our selves as the
7123 recipient of all input. Any characters typed could then be
7124 passed on down to the target. */
7128 remote_target::terminal_ours ()
7133 remote_console_output (const char *msg
)
7137 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
7140 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
7144 gdb_stdtarg
->puts (tb
);
7146 gdb_stdtarg
->flush ();
7149 /* Return the length of the stop reply queue. */
7152 remote_target::stop_reply_queue_length ()
7154 remote_state
*rs
= get_remote_state ();
7155 return rs
->stop_reply_queue
.size ();
7159 remote_notif_stop_parse (remote_target
*remote
,
7160 struct notif_client
*self
, const char *buf
,
7161 struct notif_event
*event
)
7163 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
7167 remote_notif_stop_ack (remote_target
*remote
,
7168 struct notif_client
*self
, const char *buf
,
7169 struct notif_event
*event
)
7171 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
7174 putpkt (remote
, self
->ack_command
);
7176 /* Kind can be TARGET_WAITKIND_IGNORE if we have meanwhile discarded
7177 the notification. It was left in the queue because we need to
7178 acknowledge it and pull the rest of the notifications out. */
7179 if (stop_reply
->ws
.kind () != TARGET_WAITKIND_IGNORE
)
7180 remote
->push_stop_reply (stop_reply
);
7184 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
7185 struct notif_client
*self
)
7187 /* We can't get pending events in remote_notif_process for
7188 notification stop, and we have to do this in remote_wait_ns
7189 instead. If we fetch all queued events from stub, remote stub
7190 may exit and we have no chance to process them back in
7192 remote_state
*rs
= remote
->get_remote_state ();
7193 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7197 stop_reply::~stop_reply ()
7199 for (cached_reg_t
®
: regcache
)
7203 static notif_event_up
7204 remote_notif_stop_alloc_reply ()
7206 return notif_event_up (new struct stop_reply ());
7209 /* A client of notification Stop. */
7211 struct notif_client notif_client_stop
=
7215 remote_notif_stop_parse
,
7216 remote_notif_stop_ack
,
7217 remote_notif_stop_can_get_pending_events
,
7218 remote_notif_stop_alloc_reply
,
7222 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
7223 the pid of the process that owns the threads we want to check, or
7224 -1 if we want to check all threads. */
7227 is_pending_fork_parent (const target_waitstatus
*ws
, int event_pid
,
7230 if (ws
->kind () == TARGET_WAITKIND_FORKED
7231 || ws
->kind () == TARGET_WAITKIND_VFORKED
)
7233 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
7240 /* Return the thread's pending status used to determine whether the
7241 thread is a fork parent stopped at a fork event. */
7243 static const target_waitstatus
*
7244 thread_pending_fork_status (struct thread_info
*thread
)
7246 if (thread
->has_pending_waitstatus ())
7247 return &thread
->pending_waitstatus ();
7249 return &thread
->pending_follow
;
7252 /* Determine if THREAD is a pending fork parent thread. */
7255 is_pending_fork_parent_thread (struct thread_info
*thread
)
7257 const target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7260 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7263 /* If CONTEXT contains any fork child threads that have not been
7264 reported yet, remove them from the CONTEXT list. If such a
7265 thread exists it is because we are stopped at a fork catchpoint
7266 and have not yet called follow_fork, which will set up the
7267 host-side data structures for the new process. */
7270 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7273 struct notif_client
*notif
= ¬if_client_stop
;
7275 /* For any threads stopped at a fork event, remove the corresponding
7276 fork child threads from the CONTEXT list. */
7277 for (thread_info
*thread
: all_non_exited_threads (this))
7279 const target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7281 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7282 context
->remove_thread (ws
->child_ptid ());
7285 /* Check for any pending fork events (not reported or processed yet)
7286 in process PID and remove those fork child threads from the
7287 CONTEXT list as well. */
7288 remote_notif_get_pending_events (notif
);
7289 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7290 if (event
->ws
.kind () == TARGET_WAITKIND_FORKED
7291 || event
->ws
.kind () == TARGET_WAITKIND_VFORKED
7292 || event
->ws
.kind () == TARGET_WAITKIND_THREAD_EXITED
)
7293 context
->remove_thread (event
->ws
.child_ptid ());
7296 /* Check whether any event pending in the vStopped queue would prevent a
7297 global or process wildcard vCont action. Set *may_global_wildcard to
7298 false if we can't do a global wildcard (vCont;c), and clear the event
7299 inferior's may_wildcard_vcont flag if we can't do a process-wide
7300 wildcard resume (vCont;c:pPID.-1). */
7303 remote_target::check_pending_events_prevent_wildcard_vcont
7304 (bool *may_global_wildcard
)
7306 struct notif_client
*notif
= ¬if_client_stop
;
7308 remote_notif_get_pending_events (notif
);
7309 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7311 if (event
->ws
.kind () == TARGET_WAITKIND_NO_RESUMED
7312 || event
->ws
.kind () == TARGET_WAITKIND_NO_HISTORY
)
7315 if (event
->ws
.kind () == TARGET_WAITKIND_FORKED
7316 || event
->ws
.kind () == TARGET_WAITKIND_VFORKED
)
7317 *may_global_wildcard
= false;
7319 /* This may be the first time we heard about this process.
7320 Regardless, we must not do a global wildcard resume, otherwise
7321 we'd resume this process too. */
7322 *may_global_wildcard
= false;
7323 if (event
->ptid
!= null_ptid
)
7325 inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7327 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7332 /* Discard all pending stop replies of inferior INF. */
7335 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7337 struct stop_reply
*reply
;
7338 struct remote_state
*rs
= get_remote_state ();
7339 struct remote_notif_state
*rns
= rs
->notif_state
;
7341 /* This function can be notified when an inferior exists. When the
7342 target is not remote, the notification state is NULL. */
7343 if (rs
->remote_desc
== NULL
)
7346 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7348 /* Discard the in-flight notification. */
7349 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7351 /* Leave the notification pending, since the server expects that
7352 we acknowledge it with vStopped. But clear its contents, so
7353 that later on when we acknowledge it, we also discard it. */
7354 reply
->ws
.set_ignore ();
7357 fprintf_unfiltered (gdb_stdlog
,
7358 "discarded in-flight notification\n");
7361 /* Discard the stop replies we have already pulled with
7363 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7364 rs
->stop_reply_queue
.end (),
7365 [=] (const stop_reply_up
&event
)
7367 return event
->ptid
.pid () == inf
->pid
;
7369 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7372 /* Discard the stop replies for RS in stop_reply_queue. */
7375 remote_target::discard_pending_stop_replies_in_queue ()
7377 remote_state
*rs
= get_remote_state ();
7379 /* Discard the stop replies we have already pulled with
7381 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7382 rs
->stop_reply_queue
.end (),
7383 [=] (const stop_reply_up
&event
)
7385 return event
->rs
== rs
;
7387 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7390 /* Remove the first reply in 'stop_reply_queue' which matches
7394 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7396 remote_state
*rs
= get_remote_state ();
7398 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7399 rs
->stop_reply_queue
.end (),
7400 [=] (const stop_reply_up
&event
)
7402 return event
->ptid
.matches (ptid
);
7404 struct stop_reply
*result
;
7405 if (iter
== rs
->stop_reply_queue
.end ())
7409 result
= iter
->release ();
7410 rs
->stop_reply_queue
.erase (iter
);
7414 fprintf_unfiltered (gdb_stdlog
,
7415 "notif: discard queued event: 'Stop' in %s\n",
7416 target_pid_to_str (ptid
).c_str ());
7421 /* Look for a queued stop reply belonging to PTID. If one is found,
7422 remove it from the queue, and return it. Returns NULL if none is
7423 found. If there are still queued events left to process, tell the
7424 event loop to get back to target_wait soon. */
7427 remote_target::queued_stop_reply (ptid_t ptid
)
7429 remote_state
*rs
= get_remote_state ();
7430 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7432 if (!rs
->stop_reply_queue
.empty ())
7434 /* There's still at least an event left. */
7435 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7441 /* Push a fully parsed stop reply in the stop reply queue. Since we
7442 know that we now have at least one queued event left to pass to the
7443 core side, tell the event loop to get back to target_wait soon. */
7446 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7448 remote_state
*rs
= get_remote_state ();
7449 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7452 fprintf_unfiltered (gdb_stdlog
,
7453 "notif: push 'Stop' %s to queue %d\n",
7454 target_pid_to_str (new_event
->ptid
).c_str (),
7455 int (rs
->stop_reply_queue
.size ()));
7457 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7460 /* Returns true if we have a stop reply for PTID. */
7463 remote_target::peek_stop_reply (ptid_t ptid
)
7465 remote_state
*rs
= get_remote_state ();
7466 for (auto &event
: rs
->stop_reply_queue
)
7467 if (ptid
== event
->ptid
7468 && event
->ws
.kind () == TARGET_WAITKIND_STOPPED
)
7473 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7474 starting with P and ending with PEND matches PREFIX. */
7477 strprefix (const char *p
, const char *pend
, const char *prefix
)
7479 for ( ; p
< pend
; p
++, prefix
++)
7482 return *prefix
== '\0';
7485 /* Parse the stop reply in BUF. Either the function succeeds, and the
7486 result is stored in EVENT, or throws an error. */
7489 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7491 remote_arch_state
*rsa
= NULL
;
7496 event
->ptid
= null_ptid
;
7497 event
->rs
= get_remote_state ();
7498 event
->ws
.set_ignore ();
7499 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7500 event
->regcache
.clear ();
7505 case 'T': /* Status with PC, SP, FP, ... */
7506 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7507 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7509 n... = register number
7510 r... = register contents
7513 p
= &buf
[3]; /* after Txx */
7519 p1
= strchr (p
, ':');
7521 error (_("Malformed packet(a) (missing colon): %s\n\
7525 error (_("Malformed packet(a) (missing register number): %s\n\
7529 /* Some "registers" are actually extended stop information.
7530 Note if you're adding a new entry here: GDB 7.9 and
7531 earlier assume that all register "numbers" that start
7532 with an hex digit are real register numbers. Make sure
7533 the server only sends such a packet if it knows the
7534 client understands it. */
7536 if (strprefix (p
, p1
, "thread"))
7537 event
->ptid
= read_ptid (++p1
, &p
);
7538 else if (strprefix (p
, p1
, "syscall_entry"))
7542 p
= unpack_varlen_hex (++p1
, &sysno
);
7543 event
->ws
.set_syscall_entry ((int) sysno
);
7545 else if (strprefix (p
, p1
, "syscall_return"))
7549 p
= unpack_varlen_hex (++p1
, &sysno
);
7550 event
->ws
.set_syscall_return ((int) sysno
);
7552 else if (strprefix (p
, p1
, "watch")
7553 || strprefix (p
, p1
, "rwatch")
7554 || strprefix (p
, p1
, "awatch"))
7556 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7557 p
= unpack_varlen_hex (++p1
, &addr
);
7558 event
->watch_data_address
= (CORE_ADDR
) addr
;
7560 else if (strprefix (p
, p1
, "swbreak"))
7562 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7564 /* Make sure the stub doesn't forget to indicate support
7566 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7567 error (_("Unexpected swbreak stop reason"));
7569 /* The value part is documented as "must be empty",
7570 though we ignore it, in case we ever decide to make
7571 use of it in a backward compatible way. */
7572 p
= strchrnul (p1
+ 1, ';');
7574 else if (strprefix (p
, p1
, "hwbreak"))
7576 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7578 /* Make sure the stub doesn't forget to indicate support
7580 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7581 error (_("Unexpected hwbreak stop reason"));
7584 p
= strchrnul (p1
+ 1, ';');
7586 else if (strprefix (p
, p1
, "library"))
7588 event
->ws
.set_loaded ();
7589 p
= strchrnul (p1
+ 1, ';');
7591 else if (strprefix (p
, p1
, "replaylog"))
7593 event
->ws
.set_no_history ();
7594 /* p1 will indicate "begin" or "end", but it makes
7595 no difference for now, so ignore it. */
7596 p
= strchrnul (p1
+ 1, ';');
7598 else if (strprefix (p
, p1
, "core"))
7602 p
= unpack_varlen_hex (++p1
, &c
);
7605 else if (strprefix (p
, p1
, "fork"))
7606 event
->ws
.set_forked (read_ptid (++p1
, &p
));
7607 else if (strprefix (p
, p1
, "vfork"))
7608 event
->ws
.set_vforked (read_ptid (++p1
, &p
));
7609 else if (strprefix (p
, p1
, "vforkdone"))
7611 event
->ws
.set_vfork_done ();
7612 p
= strchrnul (p1
+ 1, ';');
7614 else if (strprefix (p
, p1
, "exec"))
7619 /* Determine the length of the execd pathname. */
7620 p
= unpack_varlen_hex (++p1
, &ignored
);
7621 pathlen
= (p
- p1
) / 2;
7623 /* Save the pathname for event reporting and for
7624 the next run command. */
7625 gdb::unique_xmalloc_ptr
<char> pathname
7626 ((char *) xmalloc (pathlen
+ 1));
7627 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7628 pathname
.get ()[pathlen
] = '\0';
7630 /* This is freed during event handling. */
7631 event
->ws
.set_execd (std::move (pathname
));
7633 /* Skip the registers included in this packet, since
7634 they may be for an architecture different from the
7635 one used by the original program. */
7638 else if (strprefix (p
, p1
, "create"))
7640 event
->ws
.set_thread_created ();
7641 p
= strchrnul (p1
+ 1, ';');
7650 p
= strchrnul (p1
+ 1, ';');
7655 /* Maybe a real ``P'' register number. */
7656 p_temp
= unpack_varlen_hex (p
, &pnum
);
7657 /* If the first invalid character is the colon, we got a
7658 register number. Otherwise, it's an unknown stop
7662 /* If we haven't parsed the event's thread yet, find
7663 it now, in order to find the architecture of the
7664 reported expedited registers. */
7665 if (event
->ptid
== null_ptid
)
7667 /* If there is no thread-id information then leave
7668 the event->ptid as null_ptid. Later in
7669 process_stop_reply we will pick a suitable
7671 const char *thr
= strstr (p1
+ 1, ";thread:");
7673 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7680 = (event
->ptid
== null_ptid
7682 : find_inferior_ptid (this, event
->ptid
));
7683 /* If this is the first time we learn anything
7684 about this process, skip the registers
7685 included in this packet, since we don't yet
7686 know which architecture to use to parse them.
7687 We'll determine the architecture later when
7688 we process the stop reply and retrieve the
7689 target description, via
7690 remote_notice_new_inferior ->
7691 post_create_inferior. */
7694 p
= strchrnul (p1
+ 1, ';');
7699 event
->arch
= inf
->gdbarch
;
7700 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7704 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7705 cached_reg_t cached_reg
;
7708 error (_("Remote sent bad register number %s: %s\n\
7710 hex_string (pnum
), p
, buf
);
7712 cached_reg
.num
= reg
->regnum
;
7713 cached_reg
.data
= (gdb_byte
*)
7714 xmalloc (register_size (event
->arch
, reg
->regnum
));
7717 fieldsize
= hex2bin (p
, cached_reg
.data
,
7718 register_size (event
->arch
, reg
->regnum
));
7720 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7721 warning (_("Remote reply is too short: %s"), buf
);
7723 event
->regcache
.push_back (cached_reg
);
7727 /* Not a number. Silently skip unknown optional
7729 p
= strchrnul (p1
+ 1, ';');
7734 error (_("Remote register badly formatted: %s\nhere: %s"),
7739 if (event
->ws
.kind () != TARGET_WAITKIND_IGNORE
)
7743 case 'S': /* Old style status, just signal only. */
7747 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7748 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7749 event
->ws
.set_stopped ((enum gdb_signal
) sig
);
7751 event
->ws
.set_stopped (GDB_SIGNAL_UNKNOWN
);
7754 case 'w': /* Thread exited. */
7758 p
= unpack_varlen_hex (&buf
[1], &value
);
7759 event
->ws
.set_thread_exited (value
);
7761 error (_("stop reply packet badly formatted: %s"), buf
);
7762 event
->ptid
= read_ptid (++p
, NULL
);
7765 case 'W': /* Target exited. */
7770 /* GDB used to accept only 2 hex chars here. Stubs should
7771 only send more if they detect GDB supports multi-process
7773 p
= unpack_varlen_hex (&buf
[1], &value
);
7777 /* The remote process exited. */
7778 event
->ws
.set_exited (value
);
7782 /* The remote process exited with a signal. */
7783 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7784 event
->ws
.set_signalled ((enum gdb_signal
) value
);
7786 event
->ws
.set_signalled (GDB_SIGNAL_UNKNOWN
);
7789 /* If no process is specified, return null_ptid, and let the
7790 caller figure out the right process to use. */
7800 else if (startswith (p
, "process:"))
7804 p
+= sizeof ("process:") - 1;
7805 unpack_varlen_hex (p
, &upid
);
7809 error (_("unknown stop reply packet: %s"), buf
);
7812 error (_("unknown stop reply packet: %s"), buf
);
7813 event
->ptid
= ptid_t (pid
);
7817 event
->ws
.set_no_resumed ();
7818 event
->ptid
= minus_one_ptid
;
7823 /* When the stub wants to tell GDB about a new notification reply, it
7824 sends a notification (%Stop, for example). Those can come it at
7825 any time, hence, we have to make sure that any pending
7826 putpkt/getpkt sequence we're making is finished, before querying
7827 the stub for more events with the corresponding ack command
7828 (vStopped, for example). E.g., if we started a vStopped sequence
7829 immediately upon receiving the notification, something like this
7837 1.6) <-- (registers reply to step #1.3)
7839 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7842 To solve this, whenever we parse a %Stop notification successfully,
7843 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7844 doing whatever we were doing:
7850 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7851 2.5) <-- (registers reply to step #2.3)
7853 Eventually after step #2.5, we return to the event loop, which
7854 notices there's an event on the
7855 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7856 associated callback --- the function below. At this point, we're
7857 always safe to start a vStopped sequence. :
7860 2.7) <-- T05 thread:2
7866 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7868 struct remote_state
*rs
= get_remote_state ();
7870 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7873 fprintf_unfiltered (gdb_stdlog
,
7874 "notif: process: '%s' ack pending event\n",
7878 nc
->ack (this, nc
, rs
->buf
.data (),
7879 rs
->notif_state
->pending_event
[nc
->id
]);
7880 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7884 getpkt (&rs
->buf
, 0);
7885 if (strcmp (rs
->buf
.data (), "OK") == 0)
7888 remote_notif_ack (this, nc
, rs
->buf
.data ());
7894 fprintf_unfiltered (gdb_stdlog
,
7895 "notif: process: '%s' no pending reply\n",
7900 /* Wrapper around remote_target::remote_notif_get_pending_events to
7901 avoid having to export the whole remote_target class. */
7904 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7906 remote
->remote_notif_get_pending_events (nc
);
7909 /* Called from process_stop_reply when the stop packet we are responding
7910 to didn't include a process-id or thread-id. STATUS is the stop event
7911 we are responding to.
7913 It is the task of this function to select a suitable thread (or process)
7914 and return its ptid, this is the thread (or process) we will assume the
7915 stop event came from.
7917 In some cases there isn't really any choice about which thread (or
7918 process) is selected, a basic remote with a single process containing a
7919 single thread might choose not to send any process-id or thread-id in
7920 its stop packets, this function will select and return the one and only
7923 However, if a target supports multiple threads (or processes) and still
7924 doesn't include a thread-id (or process-id) in its stop packet then
7925 first, this is a badly behaving target, and second, we're going to have
7926 to select a thread (or process) at random and use that. This function
7927 will print a warning to the user if it detects that there is the
7928 possibility that GDB is guessing which thread (or process) to
7931 Note that this is called before GDB fetches the updated thread list from the
7932 target. So it's possible for the stop reply to be ambiguous and for GDB to
7933 not realize it. For example, if there's initially one thread, the target
7934 spawns a second thread, and then sends a stop reply without an id that
7935 concerns the first thread. GDB will assume the stop reply is about the
7936 first thread - the only thread it knows about - without printing a warning.
7937 Anyway, if the remote meant for the stop reply to be about the second thread,
7938 then it would be really broken, because GDB doesn't know about that thread
7942 remote_target::select_thread_for_ambiguous_stop_reply
7943 (const struct target_waitstatus
*status
)
7945 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7947 /* Some stop events apply to all threads in an inferior, while others
7948 only apply to a single thread. */
7949 bool process_wide_stop
7950 = (status
->kind () == TARGET_WAITKIND_EXITED
7951 || status
->kind () == TARGET_WAITKIND_SIGNALLED
);
7953 remote_debug_printf ("process_wide_stop = %d", process_wide_stop
);
7955 thread_info
*first_resumed_thread
= nullptr;
7956 bool ambiguous
= false;
7958 /* Consider all non-exited threads of the target, find the first resumed
7960 for (thread_info
*thr
: all_non_exited_threads (this))
7962 remote_thread_info
*remote_thr
= get_remote_thread_info (thr
);
7964 if (remote_thr
->get_resume_state () != resume_state::RESUMED
)
7967 if (first_resumed_thread
== nullptr)
7968 first_resumed_thread
= thr
;
7969 else if (!process_wide_stop
7970 || first_resumed_thread
->ptid
.pid () != thr
->ptid
.pid ())
7974 remote_debug_printf ("first resumed thread is %s",
7975 pid_to_str (first_resumed_thread
->ptid
).c_str ());
7976 remote_debug_printf ("is this guess ambiguous? = %d", ambiguous
);
7978 gdb_assert (first_resumed_thread
!= nullptr);
7980 /* Warn if the remote target is sending ambiguous stop replies. */
7983 static bool warned
= false;
7987 /* If you are seeing this warning then the remote target has
7988 stopped without specifying a thread-id, but the target
7989 does have multiple threads (or inferiors), and so GDB is
7990 having to guess which thread stopped.
7992 Examples of what might cause this are the target sending
7993 and 'S' stop packet, or a 'T' stop packet and not
7994 including a thread-id.
7996 Additionally, the target might send a 'W' or 'X packet
7997 without including a process-id, when the target has
7998 multiple running inferiors. */
7999 if (process_wide_stop
)
8000 warning (_("multi-inferior target stopped without "
8001 "sending a process-id, using first "
8002 "non-exited inferior"));
8004 warning (_("multi-threaded target stopped without "
8005 "sending a thread-id, using first "
8006 "non-exited thread"));
8011 /* If this is a stop for all threads then don't use a particular threads
8012 ptid, instead create a new ptid where only the pid field is set. */
8013 if (process_wide_stop
)
8014 return ptid_t (first_resumed_thread
->ptid
.pid ());
8016 return first_resumed_thread
->ptid
;
8019 /* Called when it is decided that STOP_REPLY holds the info of the
8020 event that is to be returned to the core. This function always
8021 destroys STOP_REPLY. */
8024 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
8025 struct target_waitstatus
*status
)
8027 *status
= stop_reply
->ws
;
8028 ptid_t ptid
= stop_reply
->ptid
;
8030 /* If no thread/process was reported by the stub then select a suitable
8032 if (ptid
== null_ptid
)
8033 ptid
= select_thread_for_ambiguous_stop_reply (status
);
8034 gdb_assert (ptid
!= null_ptid
);
8036 if (status
->kind () != TARGET_WAITKIND_EXITED
8037 && status
->kind () != TARGET_WAITKIND_SIGNALLED
8038 && status
->kind () != TARGET_WAITKIND_NO_RESUMED
)
8040 /* Expedited registers. */
8041 if (!stop_reply
->regcache
.empty ())
8043 struct regcache
*regcache
8044 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
8046 for (cached_reg_t
®
: stop_reply
->regcache
)
8048 regcache
->raw_supply (reg
.num
, reg
.data
);
8052 stop_reply
->regcache
.clear ();
8055 remote_notice_new_inferior (ptid
, false);
8056 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
8057 remote_thr
->core
= stop_reply
->core
;
8058 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
8059 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
8061 if (target_is_non_stop_p ())
8063 /* If the target works in non-stop mode, a stop-reply indicates that
8064 only this thread stopped. */
8065 remote_thr
->set_not_resumed ();
8069 /* If the target works in all-stop mode, a stop-reply indicates that
8070 all the target's threads stopped. */
8071 for (thread_info
*tp
: all_non_exited_threads (this))
8072 get_remote_thread_info (tp
)->set_not_resumed ();
8080 /* The non-stop mode version of target_wait. */
8083 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
8084 target_wait_flags options
)
8086 struct remote_state
*rs
= get_remote_state ();
8087 struct stop_reply
*stop_reply
;
8091 /* If in non-stop mode, get out of getpkt even if a
8092 notification is received. */
8094 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
8097 if (ret
!= -1 && !is_notif
)
8100 case 'E': /* Error of some sort. */
8101 /* We're out of sync with the target now. Did it continue
8102 or not? We can't tell which thread it was in non-stop,
8103 so just ignore this. */
8104 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
8106 case 'O': /* Console output. */
8107 remote_console_output (&rs
->buf
[1]);
8110 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
8114 /* Acknowledge a pending stop reply that may have arrived in the
8116 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
8117 remote_notif_get_pending_events (¬if_client_stop
);
8119 /* If indeed we noticed a stop reply, we're done. */
8120 stop_reply
= queued_stop_reply (ptid
);
8121 if (stop_reply
!= NULL
)
8122 return process_stop_reply (stop_reply
, status
);
8124 /* Still no event. If we're just polling for an event, then
8125 return to the event loop. */
8126 if (options
& TARGET_WNOHANG
)
8128 status
->set_ignore ();
8129 return minus_one_ptid
;
8132 /* Otherwise do a blocking wait. */
8133 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
8137 /* Return the first resumed thread. */
8140 first_remote_resumed_thread (remote_target
*target
)
8142 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
8148 /* Wait until the remote machine stops, then return, storing status in
8149 STATUS just as `wait' would. */
8152 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
,
8153 target_wait_flags options
)
8155 struct remote_state
*rs
= get_remote_state ();
8156 ptid_t event_ptid
= null_ptid
;
8158 struct stop_reply
*stop_reply
;
8162 status
->set_ignore ();
8164 stop_reply
= queued_stop_reply (ptid
);
8165 if (stop_reply
!= NULL
)
8166 return process_stop_reply (stop_reply
, status
);
8168 if (rs
->cached_wait_status
)
8169 /* Use the cached wait status, but only once. */
8170 rs
->cached_wait_status
= 0;
8175 int forever
= ((options
& TARGET_WNOHANG
) == 0
8176 && rs
->wait_forever_enabled_p
);
8178 if (!rs
->waiting_for_stop_reply
)
8180 status
->set_no_resumed ();
8181 return minus_one_ptid
;
8184 /* FIXME: cagney/1999-09-27: If we're in async mode we should
8185 _never_ wait for ever -> test on target_is_async_p().
8186 However, before we do that we need to ensure that the caller
8187 knows how to take the target into/out of async mode. */
8188 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
8190 /* GDB gets a notification. Return to core as this event is
8192 if (ret
!= -1 && is_notif
)
8193 return minus_one_ptid
;
8195 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
8196 return minus_one_ptid
;
8199 buf
= rs
->buf
.data ();
8201 /* Assume that the target has acknowledged Ctrl-C unless we receive
8202 an 'F' or 'O' packet. */
8203 if (buf
[0] != 'F' && buf
[0] != 'O')
8204 rs
->ctrlc_pending_p
= 0;
8208 case 'E': /* Error of some sort. */
8209 /* We're out of sync with the target now. Did it continue or
8210 not? Not is more likely, so report a stop. */
8211 rs
->waiting_for_stop_reply
= 0;
8213 warning (_("Remote failure reply: %s"), buf
);
8214 status
->set_stopped (GDB_SIGNAL_0
);
8216 case 'F': /* File-I/O request. */
8217 /* GDB may access the inferior memory while handling the File-I/O
8218 request, but we don't want GDB accessing memory while waiting
8219 for a stop reply. See the comments in putpkt_binary. Set
8220 waiting_for_stop_reply to 0 temporarily. */
8221 rs
->waiting_for_stop_reply
= 0;
8222 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
8223 rs
->ctrlc_pending_p
= 0;
8224 /* GDB handled the File-I/O request, and the target is running
8225 again. Keep waiting for events. */
8226 rs
->waiting_for_stop_reply
= 1;
8228 case 'N': case 'T': case 'S': case 'X': case 'W':
8230 /* There is a stop reply to handle. */
8231 rs
->waiting_for_stop_reply
= 0;
8234 = (struct stop_reply
*) remote_notif_parse (this,
8238 event_ptid
= process_stop_reply (stop_reply
, status
);
8241 case 'O': /* Console output. */
8242 remote_console_output (buf
+ 1);
8245 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
8247 /* Zero length reply means that we tried 'S' or 'C' and the
8248 remote system doesn't support it. */
8249 target_terminal::ours_for_output ();
8251 ("Can't send signals to this remote system. %s not sent.\n",
8252 gdb_signal_to_name (rs
->last_sent_signal
));
8253 rs
->last_sent_signal
= GDB_SIGNAL_0
;
8254 target_terminal::inferior ();
8256 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
8262 warning (_("Invalid remote reply: %s"), buf
);
8266 if (status
->kind () == TARGET_WAITKIND_NO_RESUMED
)
8267 return minus_one_ptid
;
8268 else if (status
->kind () == TARGET_WAITKIND_IGNORE
)
8270 /* Nothing interesting happened. If we're doing a non-blocking
8271 poll, we're done. Otherwise, go back to waiting. */
8272 if (options
& TARGET_WNOHANG
)
8273 return minus_one_ptid
;
8277 else if (status
->kind () != TARGET_WAITKIND_EXITED
8278 && status
->kind () != TARGET_WAITKIND_SIGNALLED
)
8280 if (event_ptid
!= null_ptid
)
8281 record_currthread (rs
, event_ptid
);
8283 event_ptid
= first_remote_resumed_thread (this);
8287 /* A process exit. Invalidate our notion of current thread. */
8288 record_currthread (rs
, minus_one_ptid
);
8289 /* It's possible that the packet did not include a pid. */
8290 if (event_ptid
== null_ptid
)
8291 event_ptid
= first_remote_resumed_thread (this);
8292 /* EVENT_PTID could still be NULL_PTID. Double-check. */
8293 if (event_ptid
== null_ptid
)
8294 event_ptid
= magic_null_ptid
;
8300 /* Wait until the remote machine stops, then return, storing status in
8301 STATUS just as `wait' would. */
8304 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
,
8305 target_wait_flags options
)
8307 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
8309 remote_state
*rs
= get_remote_state ();
8311 /* Start by clearing the flag that asks for our wait method to be called,
8312 we'll mark it again at the end if needed. */
8313 if (target_is_async_p ())
8314 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
8318 if (target_is_non_stop_p ())
8319 event_ptid
= wait_ns (ptid
, status
, options
);
8321 event_ptid
= wait_as (ptid
, status
, options
);
8323 if (target_is_async_p ())
8325 /* If there are events left in the queue, or unacknowledged
8326 notifications, then tell the event loop to call us again. */
8327 if (!rs
->stop_reply_queue
.empty ()
8328 || rs
->notif_state
->pending_event
[notif_client_stop
.id
] != nullptr)
8329 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
8335 /* Fetch a single register using a 'p' packet. */
8338 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8341 struct gdbarch
*gdbarch
= regcache
->arch ();
8342 struct remote_state
*rs
= get_remote_state ();
8344 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8347 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8350 if (reg
->pnum
== -1)
8353 p
= rs
->buf
.data ();
8355 p
+= hexnumstr (p
, reg
->pnum
);
8358 getpkt (&rs
->buf
, 0);
8360 buf
= rs
->buf
.data ();
8362 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8366 case PACKET_UNKNOWN
:
8369 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8370 gdbarch_register_name (regcache
->arch (),
8375 /* If this register is unfetchable, tell the regcache. */
8378 regcache
->raw_supply (reg
->regnum
, NULL
);
8382 /* Otherwise, parse and supply the value. */
8388 error (_("fetch_register_using_p: early buf termination"));
8390 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8393 regcache
->raw_supply (reg
->regnum
, regp
);
8397 /* Fetch the registers included in the target's 'g' packet. */
8400 remote_target::send_g_packet ()
8402 struct remote_state
*rs
= get_remote_state ();
8405 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8407 getpkt (&rs
->buf
, 0);
8408 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8409 error (_("Could not read registers; remote failure reply '%s'"),
8412 /* We can get out of synch in various cases. If the first character
8413 in the buffer is not a hex character, assume that has happened
8414 and try to fetch another packet to read. */
8415 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8416 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8417 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8418 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8420 remote_debug_printf ("Bad register packet; fetching a new packet");
8421 getpkt (&rs
->buf
, 0);
8424 buf_len
= strlen (rs
->buf
.data ());
8426 /* Sanity check the received packet. */
8427 if (buf_len
% 2 != 0)
8428 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8434 remote_target::process_g_packet (struct regcache
*regcache
)
8436 struct gdbarch
*gdbarch
= regcache
->arch ();
8437 struct remote_state
*rs
= get_remote_state ();
8438 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8443 buf_len
= strlen (rs
->buf
.data ());
8445 /* Further sanity checks, with knowledge of the architecture. */
8446 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8447 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8449 rsa
->sizeof_g_packet
, buf_len
/ 2,
8452 /* Save the size of the packet sent to us by the target. It is used
8453 as a heuristic when determining the max size of packets that the
8454 target can safely receive. */
8455 if (rsa
->actual_register_packet_size
== 0)
8456 rsa
->actual_register_packet_size
= buf_len
;
8458 /* If this is smaller than we guessed the 'g' packet would be,
8459 update our records. A 'g' reply that doesn't include a register's
8460 value implies either that the register is not available, or that
8461 the 'p' packet must be used. */
8462 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8464 long sizeof_g_packet
= buf_len
/ 2;
8466 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8468 long offset
= rsa
->regs
[i
].offset
;
8469 long reg_size
= register_size (gdbarch
, i
);
8471 if (rsa
->regs
[i
].pnum
== -1)
8474 if (offset
>= sizeof_g_packet
)
8475 rsa
->regs
[i
].in_g_packet
= 0;
8476 else if (offset
+ reg_size
> sizeof_g_packet
)
8477 error (_("Truncated register %d in remote 'g' packet"), i
);
8479 rsa
->regs
[i
].in_g_packet
= 1;
8482 /* Looks valid enough, we can assume this is the correct length
8483 for a 'g' packet. It's important not to adjust
8484 rsa->sizeof_g_packet if we have truncated registers otherwise
8485 this "if" won't be run the next time the method is called
8486 with a packet of the same size and one of the internal errors
8487 below will trigger instead. */
8488 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8491 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8493 /* Unimplemented registers read as all bits zero. */
8494 memset (regs
, 0, rsa
->sizeof_g_packet
);
8496 /* Reply describes registers byte by byte, each byte encoded as two
8497 hex characters. Suck them all up, then supply them to the
8498 register cacheing/storage mechanism. */
8500 p
= rs
->buf
.data ();
8501 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8503 if (p
[0] == 0 || p
[1] == 0)
8504 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8505 internal_error (__FILE__
, __LINE__
,
8506 _("unexpected end of 'g' packet reply"));
8508 if (p
[0] == 'x' && p
[1] == 'x')
8509 regs
[i
] = 0; /* 'x' */
8511 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8515 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8517 struct packet_reg
*r
= &rsa
->regs
[i
];
8518 long reg_size
= register_size (gdbarch
, i
);
8522 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8523 /* This shouldn't happen - we adjusted in_g_packet above. */
8524 internal_error (__FILE__
, __LINE__
,
8525 _("unexpected end of 'g' packet reply"));
8526 else if (rs
->buf
[r
->offset
* 2] == 'x')
8528 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8529 /* The register isn't available, mark it as such (at
8530 the same time setting the value to zero). */
8531 regcache
->raw_supply (r
->regnum
, NULL
);
8534 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8540 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8543 process_g_packet (regcache
);
8546 /* Make the remote selected traceframe match GDB's selected
8550 remote_target::set_remote_traceframe ()
8553 struct remote_state
*rs
= get_remote_state ();
8555 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8558 /* Avoid recursion, remote_trace_find calls us again. */
8559 rs
->remote_traceframe_number
= get_traceframe_number ();
8561 newnum
= target_trace_find (tfind_number
,
8562 get_traceframe_number (), 0, 0, NULL
);
8564 /* Should not happen. If it does, all bets are off. */
8565 if (newnum
!= get_traceframe_number ())
8566 warning (_("could not set remote traceframe"));
8570 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8572 struct gdbarch
*gdbarch
= regcache
->arch ();
8573 struct remote_state
*rs
= get_remote_state ();
8574 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8577 set_remote_traceframe ();
8578 set_general_thread (regcache
->ptid ());
8582 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8584 gdb_assert (reg
!= NULL
);
8586 /* If this register might be in the 'g' packet, try that first -
8587 we are likely to read more than one register. If this is the
8588 first 'g' packet, we might be overly optimistic about its
8589 contents, so fall back to 'p'. */
8590 if (reg
->in_g_packet
)
8592 fetch_registers_using_g (regcache
);
8593 if (reg
->in_g_packet
)
8597 if (fetch_register_using_p (regcache
, reg
))
8600 /* This register is not available. */
8601 regcache
->raw_supply (reg
->regnum
, NULL
);
8606 fetch_registers_using_g (regcache
);
8608 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8609 if (!rsa
->regs
[i
].in_g_packet
)
8610 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8612 /* This register is not available. */
8613 regcache
->raw_supply (i
, NULL
);
8617 /* Prepare to store registers. Since we may send them all (using a
8618 'G' request), we have to read out the ones we don't want to change
8622 remote_target::prepare_to_store (struct regcache
*regcache
)
8624 struct remote_state
*rs
= get_remote_state ();
8625 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8628 /* Make sure the entire registers array is valid. */
8629 switch (packet_support (PACKET_P
))
8631 case PACKET_DISABLE
:
8632 case PACKET_SUPPORT_UNKNOWN
:
8633 /* Make sure all the necessary registers are cached. */
8634 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8635 if (rsa
->regs
[i
].in_g_packet
)
8636 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8643 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8644 packet was not recognized. */
8647 remote_target::store_register_using_P (const struct regcache
*regcache
,
8650 struct gdbarch
*gdbarch
= regcache
->arch ();
8651 struct remote_state
*rs
= get_remote_state ();
8652 /* Try storing a single register. */
8653 char *buf
= rs
->buf
.data ();
8654 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8657 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8660 if (reg
->pnum
== -1)
8663 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8664 p
= buf
+ strlen (buf
);
8665 regcache
->raw_collect (reg
->regnum
, regp
);
8666 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8668 getpkt (&rs
->buf
, 0);
8670 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8675 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8676 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8677 case PACKET_UNKNOWN
:
8680 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8684 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8685 contents of the register cache buffer. FIXME: ignores errors. */
8688 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8690 struct remote_state
*rs
= get_remote_state ();
8691 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8695 /* Extract all the registers in the regcache copying them into a
8700 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8701 memset (regs
, 0, rsa
->sizeof_g_packet
);
8702 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8704 struct packet_reg
*r
= &rsa
->regs
[i
];
8707 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8711 /* Command describes registers byte by byte,
8712 each byte encoded as two hex characters. */
8713 p
= rs
->buf
.data ();
8715 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8717 getpkt (&rs
->buf
, 0);
8718 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8719 error (_("Could not write registers; remote failure reply '%s'"),
8723 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8724 of the register cache buffer. FIXME: ignores errors. */
8727 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8729 struct gdbarch
*gdbarch
= regcache
->arch ();
8730 struct remote_state
*rs
= get_remote_state ();
8731 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8734 set_remote_traceframe ();
8735 set_general_thread (regcache
->ptid ());
8739 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8741 gdb_assert (reg
!= NULL
);
8743 /* Always prefer to store registers using the 'P' packet if
8744 possible; we often change only a small number of registers.
8745 Sometimes we change a larger number; we'd need help from a
8746 higher layer to know to use 'G'. */
8747 if (store_register_using_P (regcache
, reg
))
8750 /* For now, don't complain if we have no way to write the
8751 register. GDB loses track of unavailable registers too
8752 easily. Some day, this may be an error. We don't have
8753 any way to read the register, either... */
8754 if (!reg
->in_g_packet
)
8757 store_registers_using_G (regcache
);
8761 store_registers_using_G (regcache
);
8763 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8764 if (!rsa
->regs
[i
].in_g_packet
)
8765 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8766 /* See above for why we do not issue an error here. */
8771 /* Return the number of hex digits in num. */
8774 hexnumlen (ULONGEST num
)
8778 for (i
= 0; num
!= 0; i
++)
8781 return std::max (i
, 1);
8784 /* Set BUF to the minimum number of hex digits representing NUM. */
8787 hexnumstr (char *buf
, ULONGEST num
)
8789 int len
= hexnumlen (num
);
8791 return hexnumnstr (buf
, num
, len
);
8795 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8798 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8804 for (i
= width
- 1; i
>= 0; i
--)
8806 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8813 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8816 remote_address_masked (CORE_ADDR addr
)
8818 unsigned int address_size
= remote_address_size
;
8820 /* If "remoteaddresssize" was not set, default to target address size. */
8822 address_size
= gdbarch_addr_bit (target_gdbarch ());
8824 if (address_size
> 0
8825 && address_size
< (sizeof (ULONGEST
) * 8))
8827 /* Only create a mask when that mask can safely be constructed
8828 in a ULONGEST variable. */
8831 mask
= (mask
<< address_size
) - 1;
8837 /* Determine whether the remote target supports binary downloading.
8838 This is accomplished by sending a no-op memory write of zero length
8839 to the target at the specified address. It does not suffice to send
8840 the whole packet, since many stubs strip the eighth bit and
8841 subsequently compute a wrong checksum, which causes real havoc with
8844 NOTE: This can still lose if the serial line is not eight-bit
8845 clean. In cases like this, the user should clear "remote
8849 remote_target::check_binary_download (CORE_ADDR addr
)
8851 struct remote_state
*rs
= get_remote_state ();
8853 switch (packet_support (PACKET_X
))
8855 case PACKET_DISABLE
:
8859 case PACKET_SUPPORT_UNKNOWN
:
8863 p
= rs
->buf
.data ();
8865 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8867 p
+= hexnumstr (p
, (ULONGEST
) 0);
8871 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8872 getpkt (&rs
->buf
, 0);
8874 if (rs
->buf
[0] == '\0')
8876 remote_debug_printf ("binary downloading NOT supported by target");
8877 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8881 remote_debug_printf ("binary downloading supported by target");
8882 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8889 /* Helper function to resize the payload in order to try to get a good
8890 alignment. We try to write an amount of data such that the next write will
8891 start on an address aligned on REMOTE_ALIGN_WRITES. */
8894 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8896 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8899 /* Write memory data directly to the remote machine.
8900 This does not inform the data cache; the data cache uses this.
8901 HEADER is the starting part of the packet.
8902 MEMADDR is the address in the remote memory space.
8903 MYADDR is the address of the buffer in our space.
8904 LEN_UNITS is the number of addressable units to write.
8905 UNIT_SIZE is the length in bytes of an addressable unit.
8906 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8907 should send data as binary ('X'), or hex-encoded ('M').
8909 The function creates packet of the form
8910 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8912 where encoding of <DATA> is terminated by PACKET_FORMAT.
8914 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8917 Return the transferred status, error or OK (an
8918 'enum target_xfer_status' value). Save the number of addressable units
8919 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8921 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8922 exchange between gdb and the stub could look like (?? in place of the
8928 -> $M1000,3:eeeeffffeeee#??
8932 <- eeeeffffeeeedddd */
8935 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8936 const gdb_byte
*myaddr
,
8939 ULONGEST
*xfered_len_units
,
8940 char packet_format
, int use_length
)
8942 struct remote_state
*rs
= get_remote_state ();
8948 int payload_capacity_bytes
;
8949 int payload_length_bytes
;
8951 if (packet_format
!= 'X' && packet_format
!= 'M')
8952 internal_error (__FILE__
, __LINE__
,
8953 _("remote_write_bytes_aux: bad packet format"));
8956 return TARGET_XFER_EOF
;
8958 payload_capacity_bytes
= get_memory_write_packet_size ();
8960 /* The packet buffer will be large enough for the payload;
8961 get_memory_packet_size ensures this. */
8964 /* Compute the size of the actual payload by subtracting out the
8965 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8967 payload_capacity_bytes
-= strlen ("$,:#NN");
8969 /* The comma won't be used. */
8970 payload_capacity_bytes
+= 1;
8971 payload_capacity_bytes
-= strlen (header
);
8972 payload_capacity_bytes
-= hexnumlen (memaddr
);
8974 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8976 strcat (rs
->buf
.data (), header
);
8977 p
= rs
->buf
.data () + strlen (header
);
8979 /* Compute a best guess of the number of bytes actually transfered. */
8980 if (packet_format
== 'X')
8982 /* Best guess at number of bytes that will fit. */
8983 todo_units
= std::min (len_units
,
8984 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8986 payload_capacity_bytes
-= hexnumlen (todo_units
);
8987 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8991 /* Number of bytes that will fit. */
8993 = std::min (len_units
,
8994 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8996 payload_capacity_bytes
-= hexnumlen (todo_units
);
8997 todo_units
= std::min (todo_units
,
8998 (payload_capacity_bytes
/ unit_size
) / 2);
9001 if (todo_units
<= 0)
9002 internal_error (__FILE__
, __LINE__
,
9003 _("minimum packet size too small to write data"));
9005 /* If we already need another packet, then try to align the end
9006 of this packet to a useful boundary. */
9007 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
9008 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
9010 /* Append "<memaddr>". */
9011 memaddr
= remote_address_masked (memaddr
);
9012 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9019 /* Append the length and retain its location and size. It may need to be
9020 adjusted once the packet body has been created. */
9022 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
9030 /* Append the packet body. */
9031 if (packet_format
== 'X')
9033 /* Binary mode. Send target system values byte by byte, in
9034 increasing byte addresses. Only escape certain critical
9036 payload_length_bytes
=
9037 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
9038 &units_written
, payload_capacity_bytes
);
9040 /* If not all TODO units fit, then we'll need another packet. Make
9041 a second try to keep the end of the packet aligned. Don't do
9042 this if the packet is tiny. */
9043 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
9047 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
9049 if (new_todo_units
!= units_written
)
9050 payload_length_bytes
=
9051 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
9052 (gdb_byte
*) p
, &units_written
,
9053 payload_capacity_bytes
);
9056 p
+= payload_length_bytes
;
9057 if (use_length
&& units_written
< todo_units
)
9059 /* Escape chars have filled up the buffer prematurely,
9060 and we have actually sent fewer units than planned.
9061 Fix-up the length field of the packet. Use the same
9062 number of characters as before. */
9063 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
9065 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
9070 /* Normal mode: Send target system values byte by byte, in
9071 increasing byte addresses. Each byte is encoded as a two hex
9073 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
9074 units_written
= todo_units
;
9077 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
9078 getpkt (&rs
->buf
, 0);
9080 if (rs
->buf
[0] == 'E')
9081 return TARGET_XFER_E_IO
;
9083 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
9084 send fewer units than we'd planned. */
9085 *xfered_len_units
= (ULONGEST
) units_written
;
9086 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9089 /* Write memory data directly to the remote machine.
9090 This does not inform the data cache; the data cache uses this.
9091 MEMADDR is the address in the remote memory space.
9092 MYADDR is the address of the buffer in our space.
9093 LEN is the number of bytes.
9095 Return the transferred status, error or OK (an
9096 'enum target_xfer_status' value). Save the number of bytes
9097 transferred in *XFERED_LEN. Only transfer a single packet. */
9100 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
9101 ULONGEST len
, int unit_size
,
9102 ULONGEST
*xfered_len
)
9104 const char *packet_format
= NULL
;
9106 /* Check whether the target supports binary download. */
9107 check_binary_download (memaddr
);
9109 switch (packet_support (PACKET_X
))
9112 packet_format
= "X";
9114 case PACKET_DISABLE
:
9115 packet_format
= "M";
9117 case PACKET_SUPPORT_UNKNOWN
:
9118 internal_error (__FILE__
, __LINE__
,
9119 _("remote_write_bytes: bad internal state"));
9121 internal_error (__FILE__
, __LINE__
, _("bad switch"));
9124 return remote_write_bytes_aux (packet_format
,
9125 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
9126 packet_format
[0], 1);
9129 /* Read memory data directly from the remote machine.
9130 This does not use the data cache; the data cache uses this.
9131 MEMADDR is the address in the remote memory space.
9132 MYADDR is the address of the buffer in our space.
9133 LEN_UNITS is the number of addressable memory units to read..
9134 UNIT_SIZE is the length in bytes of an addressable unit.
9136 Return the transferred status, error or OK (an
9137 'enum target_xfer_status' value). Save the number of bytes
9138 transferred in *XFERED_LEN_UNITS.
9140 See the comment of remote_write_bytes_aux for an example of
9141 memory read/write exchange between gdb and the stub. */
9144 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
9146 int unit_size
, ULONGEST
*xfered_len_units
)
9148 struct remote_state
*rs
= get_remote_state ();
9149 int buf_size_bytes
; /* Max size of packet output buffer. */
9154 buf_size_bytes
= get_memory_read_packet_size ();
9155 /* The packet buffer will be large enough for the payload;
9156 get_memory_packet_size ensures this. */
9158 /* Number of units that will fit. */
9159 todo_units
= std::min (len_units
,
9160 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
9162 /* Construct "m"<memaddr>","<len>". */
9163 memaddr
= remote_address_masked (memaddr
);
9164 p
= rs
->buf
.data ();
9166 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9168 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
9171 getpkt (&rs
->buf
, 0);
9172 if (rs
->buf
[0] == 'E'
9173 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
9174 && rs
->buf
[3] == '\0')
9175 return TARGET_XFER_E_IO
;
9176 /* Reply describes memory byte by byte, each byte encoded as two hex
9178 p
= rs
->buf
.data ();
9179 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
9180 /* Return what we have. Let higher layers handle partial reads. */
9181 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
9182 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9185 /* Using the set of read-only target sections of remote, read live
9188 For interface/parameters/return description see target.h,
9192 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
9196 ULONGEST
*xfered_len
)
9198 const struct target_section
*secp
;
9200 secp
= target_section_by_addr (this, memaddr
);
9202 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
9204 ULONGEST memend
= memaddr
+ len
;
9206 const target_section_table
*table
= target_get_section_table (this);
9207 for (const target_section
&p
: *table
)
9209 if (memaddr
>= p
.addr
)
9211 if (memend
<= p
.endaddr
)
9213 /* Entire transfer is within this section. */
9214 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9217 else if (memaddr
>= p
.endaddr
)
9219 /* This section ends before the transfer starts. */
9224 /* This section overlaps the transfer. Just do half. */
9225 len
= p
.endaddr
- memaddr
;
9226 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9233 return TARGET_XFER_EOF
;
9236 /* Similar to remote_read_bytes_1, but it reads from the remote stub
9237 first if the requested memory is unavailable in traceframe.
9238 Otherwise, fall back to remote_read_bytes_1. */
9241 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
9242 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
9243 ULONGEST
*xfered_len
)
9246 return TARGET_XFER_EOF
;
9248 if (get_traceframe_number () != -1)
9250 std::vector
<mem_range
> available
;
9252 /* If we fail to get the set of available memory, then the
9253 target does not support querying traceframe info, and so we
9254 attempt reading from the traceframe anyway (assuming the
9255 target implements the old QTro packet then). */
9256 if (traceframe_available_memory (&available
, memaddr
, len
))
9258 if (available
.empty () || available
[0].start
!= memaddr
)
9260 enum target_xfer_status res
;
9262 /* Don't read into the traceframe's available
9264 if (!available
.empty ())
9266 LONGEST oldlen
= len
;
9268 len
= available
[0].start
- memaddr
;
9269 gdb_assert (len
<= oldlen
);
9272 /* This goes through the topmost target again. */
9273 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
9274 len
, unit_size
, xfered_len
);
9275 if (res
== TARGET_XFER_OK
)
9276 return TARGET_XFER_OK
;
9279 /* No use trying further, we know some memory starting
9280 at MEMADDR isn't available. */
9282 return (*xfered_len
!= 0) ?
9283 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
9287 /* Don't try to read more than how much is available, in
9288 case the target implements the deprecated QTro packet to
9289 cater for older GDBs (the target's knowledge of read-only
9290 sections may be outdated by now). */
9291 len
= available
[0].length
;
9295 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
9300 /* Sends a packet with content determined by the printf format string
9301 FORMAT and the remaining arguments, then gets the reply. Returns
9302 whether the packet was a success, a failure, or unknown. */
9305 remote_target::remote_send_printf (const char *format
, ...)
9307 struct remote_state
*rs
= get_remote_state ();
9308 int max_size
= get_remote_packet_size ();
9311 va_start (ap
, format
);
9314 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
9318 if (size
>= max_size
)
9319 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
9321 if (putpkt (rs
->buf
) < 0)
9322 error (_("Communication problem with target."));
9325 getpkt (&rs
->buf
, 0);
9327 return packet_check_result (rs
->buf
);
9330 /* Flash writing can take quite some time. We'll set
9331 effectively infinite timeout for flash operations.
9332 In future, we'll need to decide on a better approach. */
9333 static const int remote_flash_timeout
= 1000;
9336 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9338 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9339 enum packet_result ret
;
9340 scoped_restore restore_timeout
9341 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9343 ret
= remote_send_printf ("vFlashErase:%s,%s",
9344 phex (address
, addr_size
),
9348 case PACKET_UNKNOWN
:
9349 error (_("Remote target does not support flash erase"));
9351 error (_("Error erasing flash with vFlashErase packet"));
9358 remote_target::remote_flash_write (ULONGEST address
,
9359 ULONGEST length
, ULONGEST
*xfered_len
,
9360 const gdb_byte
*data
)
9362 scoped_restore restore_timeout
9363 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9364 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9369 remote_target::flash_done ()
9373 scoped_restore restore_timeout
9374 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9376 ret
= remote_send_printf ("vFlashDone");
9380 case PACKET_UNKNOWN
:
9381 error (_("Remote target does not support vFlashDone"));
9383 error (_("Error finishing flash operation"));
9390 remote_target::files_info ()
9392 puts_filtered ("Debugging a target over a serial line.\n");
9395 /* Stuff for dealing with the packets which are part of this protocol.
9396 See comment at top of file for details. */
9398 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9399 error to higher layers. Called when a serial error is detected.
9400 The exception message is STRING, followed by a colon and a blank,
9401 the system error message for errno at function entry and final dot
9402 for output compatibility with throw_perror_with_name. */
9405 unpush_and_perror (remote_target
*target
, const char *string
)
9407 int saved_errno
= errno
;
9409 remote_unpush_target (target
);
9410 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9411 safe_strerror (saved_errno
));
9414 /* Read a single character from the remote end. The current quit
9415 handler is overridden to avoid quitting in the middle of packet
9416 sequence, as that would break communication with the remote server.
9417 See remote_serial_quit_handler for more detail. */
9420 remote_target::readchar (int timeout
)
9423 struct remote_state
*rs
= get_remote_state ();
9426 scoped_restore restore_quit_target
9427 = make_scoped_restore (&curr_quit_handler_target
, this);
9428 scoped_restore restore_quit
9429 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9431 rs
->got_ctrlc_during_io
= 0;
9433 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9435 if (rs
->got_ctrlc_during_io
)
9442 switch ((enum serial_rc
) ch
)
9445 remote_unpush_target (this);
9446 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9449 unpush_and_perror (this, _("Remote communication error. "
9450 "Target disconnected."));
9452 case SERIAL_TIMEOUT
:
9458 /* Wrapper for serial_write that closes the target and throws if
9459 writing fails. The current quit handler is overridden to avoid
9460 quitting in the middle of packet sequence, as that would break
9461 communication with the remote server. See
9462 remote_serial_quit_handler for more detail. */
9465 remote_target::remote_serial_write (const char *str
, int len
)
9467 struct remote_state
*rs
= get_remote_state ();
9469 scoped_restore restore_quit_target
9470 = make_scoped_restore (&curr_quit_handler_target
, this);
9471 scoped_restore restore_quit
9472 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9474 rs
->got_ctrlc_during_io
= 0;
9476 if (serial_write (rs
->remote_desc
, str
, len
))
9478 unpush_and_perror (this, _("Remote communication error. "
9479 "Target disconnected."));
9482 if (rs
->got_ctrlc_during_io
)
9486 /* Return a string representing an escaped version of BUF, of len N.
9487 E.g. \n is converted to \\n, \t to \\t, etc. */
9490 escape_buffer (const char *buf
, int n
)
9494 stb
.putstrn (buf
, n
, '\\');
9495 return std::move (stb
.string ());
9498 /* Display a null-terminated packet on stdout, for debugging, using C
9502 print_packet (const char *buf
)
9504 puts_filtered ("\"");
9505 fputstr_filtered (buf
, '"', gdb_stdout
);
9506 puts_filtered ("\"");
9510 remote_target::putpkt (const char *buf
)
9512 return putpkt_binary (buf
, strlen (buf
));
9515 /* Wrapper around remote_target::putpkt to avoid exporting
9519 putpkt (remote_target
*remote
, const char *buf
)
9521 return remote
->putpkt (buf
);
9524 /* Send a packet to the remote machine, with error checking. The data
9525 of the packet is in BUF. The string in BUF can be at most
9526 get_remote_packet_size () - 5 to account for the $, # and checksum,
9527 and for a possible /0 if we are debugging (remote_debug) and want
9528 to print the sent packet as a string. */
9531 remote_target::putpkt_binary (const char *buf
, int cnt
)
9533 struct remote_state
*rs
= get_remote_state ();
9535 unsigned char csum
= 0;
9536 gdb::def_vector
<char> data (cnt
+ 6);
9537 char *buf2
= data
.data ();
9543 /* Catch cases like trying to read memory or listing threads while
9544 we're waiting for a stop reply. The remote server wouldn't be
9545 ready to handle this request, so we'd hang and timeout. We don't
9546 have to worry about this in synchronous mode, because in that
9547 case it's not possible to issue a command while the target is
9548 running. This is not a problem in non-stop mode, because in that
9549 case, the stub is always ready to process serial input. */
9550 if (!target_is_non_stop_p ()
9551 && target_is_async_p ()
9552 && rs
->waiting_for_stop_reply
)
9554 error (_("Cannot execute this command while the target is running.\n"
9555 "Use the \"interrupt\" command to stop the target\n"
9556 "and then try again."));
9559 /* We're sending out a new packet. Make sure we don't look at a
9560 stale cached response. */
9561 rs
->cached_wait_status
= 0;
9563 /* Copy the packet into buffer BUF2, encapsulating it
9564 and giving it a checksum. */
9569 for (i
= 0; i
< cnt
; i
++)
9575 *p
++ = tohex ((csum
>> 4) & 0xf);
9576 *p
++ = tohex (csum
& 0xf);
9578 /* Send it over and over until we get a positive ack. */
9586 int len
= (int) (p
- buf2
);
9589 if (remote_packet_max_chars
< 0)
9592 max_chars
= remote_packet_max_chars
;
9595 = escape_buffer (buf2
, std::min (len
, max_chars
));
9597 if (len
> max_chars
)
9598 remote_debug_printf_nofunc
9599 ("Sending packet: %s [%d bytes omitted]", str
.c_str (),
9602 remote_debug_printf_nofunc ("Sending packet: %s", str
.c_str ());
9604 remote_serial_write (buf2
, p
- buf2
);
9606 /* If this is a no acks version of the remote protocol, send the
9607 packet and move on. */
9611 /* Read until either a timeout occurs (-2) or '+' is read.
9612 Handle any notification that arrives in the mean time. */
9615 ch
= readchar (remote_timeout
);
9620 remote_debug_printf_nofunc ("Received Ack");
9623 remote_debug_printf_nofunc ("Received Nak");
9625 case SERIAL_TIMEOUT
:
9629 break; /* Retransmit buffer. */
9632 remote_debug_printf ("Packet instead of Ack, ignoring it");
9633 /* It's probably an old response sent because an ACK
9634 was lost. Gobble up the packet and ack it so it
9635 doesn't get retransmitted when we resend this
9638 remote_serial_write ("+", 1);
9639 continue; /* Now, go look for +. */
9646 /* If we got a notification, handle it, and go back to looking
9648 /* We've found the start of a notification. Now
9649 collect the data. */
9650 val
= read_frame (&rs
->buf
);
9653 remote_debug_printf_nofunc
9654 (" Notification received: %s",
9655 escape_buffer (rs
->buf
.data (), val
).c_str ());
9657 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9658 /* We're in sync now, rewait for the ack. */
9662 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9668 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9672 break; /* Here to retransmit. */
9676 /* This is wrong. If doing a long backtrace, the user should be
9677 able to get out next time we call QUIT, without anything as
9678 violent as interrupt_query. If we want to provide a way out of
9679 here without getting to the next QUIT, it should be based on
9680 hitting ^C twice as in remote_wait. */
9692 /* Come here after finding the start of a frame when we expected an
9693 ack. Do our best to discard the rest of this packet. */
9696 remote_target::skip_frame ()
9702 c
= readchar (remote_timeout
);
9705 case SERIAL_TIMEOUT
:
9706 /* Nothing we can do. */
9709 /* Discard the two bytes of checksum and stop. */
9710 c
= readchar (remote_timeout
);
9712 c
= readchar (remote_timeout
);
9715 case '*': /* Run length encoding. */
9716 /* Discard the repeat count. */
9717 c
= readchar (remote_timeout
);
9722 /* A regular character. */
9728 /* Come here after finding the start of the frame. Collect the rest
9729 into *BUF, verifying the checksum, length, and handling run-length
9730 compression. NUL terminate the buffer. If there is not enough room,
9733 Returns -1 on error, number of characters in buffer (ignoring the
9734 trailing NULL) on success. (could be extended to return one of the
9735 SERIAL status indications). */
9738 remote_target::read_frame (gdb::char_vector
*buf_p
)
9743 char *buf
= buf_p
->data ();
9744 struct remote_state
*rs
= get_remote_state ();
9751 c
= readchar (remote_timeout
);
9754 case SERIAL_TIMEOUT
:
9755 remote_debug_printf ("Timeout in mid-packet, retrying");
9759 remote_debug_printf ("Saw new packet start in middle of old one");
9760 return -1; /* Start a new packet, count retries. */
9764 unsigned char pktcsum
;
9770 check_0
= readchar (remote_timeout
);
9772 check_1
= readchar (remote_timeout
);
9774 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9776 remote_debug_printf ("Timeout in checksum, retrying");
9779 else if (check_0
< 0 || check_1
< 0)
9781 remote_debug_printf ("Communication error in checksum");
9785 /* Don't recompute the checksum; with no ack packets we
9786 don't have any way to indicate a packet retransmission
9791 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9792 if (csum
== pktcsum
)
9796 ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s",
9797 pktcsum
, csum
, escape_buffer (buf
, bc
).c_str ());
9799 /* Number of characters in buffer ignoring trailing
9803 case '*': /* Run length encoding. */
9808 c
= readchar (remote_timeout
);
9810 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9812 /* The character before ``*'' is repeated. */
9814 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9816 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9818 /* Make some more room in the buffer. */
9819 buf_p
->resize (buf_p
->size () + repeat
);
9820 buf
= buf_p
->data ();
9823 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9829 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9833 if (bc
>= buf_p
->size () - 1)
9835 /* Make some more room in the buffer. */
9836 buf_p
->resize (buf_p
->size () * 2);
9837 buf
= buf_p
->data ();
9847 /* Set this to the maximum number of seconds to wait instead of waiting forever
9848 in target_wait(). If this timer times out, then it generates an error and
9849 the command is aborted. This replaces most of the need for timeouts in the
9850 GDB test suite, and makes it possible to distinguish between a hung target
9851 and one with slow communications. */
9853 static int watchdog
= 0;
9855 show_watchdog (struct ui_file
*file
, int from_tty
,
9856 struct cmd_list_element
*c
, const char *value
)
9858 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
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
9866 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9867 don't have to change all the calls to getpkt to deal with the
9868 return value, because at the moment I don't know what the right
9869 thing to do it for those. */
9872 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9874 getpkt_sane (buf
, forever
);
9878 /* Read a packet from the remote machine, with error checking, and
9879 store it in *BUF. Resize *BUF if necessary to hold the result. If
9880 FOREVER, wait forever rather than timing out; this is used (in
9881 synchronous mode) to wait for a target that is is executing user
9882 code to stop. If FOREVER == 0, this function is allowed to time
9883 out gracefully and return an indication of this to the caller.
9884 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9885 consider receiving a notification enough reason to return to the
9886 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9887 holds a notification or not (a regular packet). */
9890 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9891 int forever
, int expecting_notif
,
9894 struct remote_state
*rs
= get_remote_state ();
9900 /* We're reading a new response. Make sure we don't look at a
9901 previously cached response. */
9902 rs
->cached_wait_status
= 0;
9904 strcpy (buf
->data (), "timeout");
9907 timeout
= watchdog
> 0 ? watchdog
: -1;
9908 else if (expecting_notif
)
9909 timeout
= 0; /* There should already be a char in the buffer. If
9912 timeout
= remote_timeout
;
9916 /* Process any number of notifications, and then return when
9920 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9922 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9924 /* This can loop forever if the remote side sends us
9925 characters continuously, but if it pauses, we'll get
9926 SERIAL_TIMEOUT from readchar because of timeout. Then
9927 we'll count that as a retry.
9929 Note that even when forever is set, we will only wait
9930 forever prior to the start of a packet. After that, we
9931 expect characters to arrive at a brisk pace. They should
9932 show up within remote_timeout intervals. */
9934 c
= readchar (timeout
);
9935 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9937 if (c
== SERIAL_TIMEOUT
)
9939 if (expecting_notif
)
9940 return -1; /* Don't complain, it's normal to not get
9941 anything in this case. */
9943 if (forever
) /* Watchdog went off? Kill the target. */
9945 remote_unpush_target (this);
9946 throw_error (TARGET_CLOSE_ERROR
,
9947 _("Watchdog timeout has expired. "
9948 "Target detached."));
9951 remote_debug_printf ("Timed out.");
9955 /* We've found the start of a packet or notification.
9956 Now collect the data. */
9957 val
= read_frame (buf
);
9962 remote_serial_write ("-", 1);
9965 if (tries
> MAX_TRIES
)
9967 /* We have tried hard enough, and just can't receive the
9968 packet/notification. Give up. */
9969 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9971 /* Skip the ack char if we're in no-ack mode. */
9972 if (!rs
->noack_mode
)
9973 remote_serial_write ("+", 1);
9977 /* If we got an ordinary packet, return that to our caller. */
9984 if (remote_packet_max_chars
< 0)
9987 max_chars
= remote_packet_max_chars
;
9990 = escape_buffer (buf
->data (),
9991 std::min (val
, max_chars
));
9993 if (val
> max_chars
)
9994 remote_debug_printf_nofunc
9995 ("Packet received: %s [%d bytes omitted]", str
.c_str (),
9998 remote_debug_printf_nofunc ("Packet received: %s",
10002 /* Skip the ack char if we're in no-ack mode. */
10003 if (!rs
->noack_mode
)
10004 remote_serial_write ("+", 1);
10005 if (is_notif
!= NULL
)
10010 /* If we got a notification, handle it, and go back to looking
10014 gdb_assert (c
== '%');
10016 remote_debug_printf_nofunc
10017 (" Notification received: %s",
10018 escape_buffer (buf
->data (), val
).c_str ());
10020 if (is_notif
!= NULL
)
10023 handle_notification (rs
->notif_state
, buf
->data ());
10025 /* Notifications require no acknowledgement. */
10027 if (expecting_notif
)
10034 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
10036 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
10040 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
10043 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
10046 /* Kill any new fork children of process PID that haven't been
10047 processed by follow_fork. */
10050 remote_target::kill_new_fork_children (int pid
)
10052 remote_state
*rs
= get_remote_state ();
10053 struct notif_client
*notif
= ¬if_client_stop
;
10055 /* Kill the fork child threads of any threads in process PID
10056 that are stopped at a fork event. */
10057 for (thread_info
*thread
: all_non_exited_threads (this))
10059 struct target_waitstatus
*ws
= &thread
->pending_follow
;
10061 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
10063 int child_pid
= ws
->child_ptid ().pid ();
10066 res
= remote_vkill (child_pid
);
10068 error (_("Can't kill fork child process %d"), child_pid
);
10072 /* Check for any pending fork events (not reported or processed yet)
10073 in process PID and kill those fork child threads as well. */
10074 remote_notif_get_pending_events (notif
);
10075 for (auto &event
: rs
->stop_reply_queue
)
10076 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
10078 int child_pid
= event
->ws
.child_ptid ().pid ();
10081 res
= remote_vkill (child_pid
);
10083 error (_("Can't kill fork child process %d"), child_pid
);
10088 /* Target hook to kill the current inferior. */
10091 remote_target::kill ()
10094 int pid
= inferior_ptid
.pid ();
10095 struct remote_state
*rs
= get_remote_state ();
10097 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
10099 /* If we're stopped while forking and we haven't followed yet,
10100 kill the child task. We need to do this before killing the
10101 parent task because if this is a vfork then the parent will
10103 kill_new_fork_children (pid
);
10105 res
= remote_vkill (pid
);
10108 target_mourn_inferior (inferior_ptid
);
10113 /* If we are in 'target remote' mode and we are killing the only
10114 inferior, then we will tell gdbserver to exit and unpush the
10116 if (res
== -1 && !remote_multi_process_p (rs
)
10117 && number_of_live_inferiors (this) == 1)
10121 /* We've killed the remote end, we get to mourn it. If we are
10122 not in extended mode, mourning the inferior also unpushes
10123 remote_ops from the target stack, which closes the remote
10125 target_mourn_inferior (inferior_ptid
);
10130 error (_("Can't kill process"));
10133 /* Send a kill request to the target using the 'vKill' packet. */
10136 remote_target::remote_vkill (int pid
)
10138 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
10141 remote_state
*rs
= get_remote_state ();
10143 /* Tell the remote target to detach. */
10144 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
10146 getpkt (&rs
->buf
, 0);
10148 switch (packet_ok (rs
->buf
,
10149 &remote_protocol_packets
[PACKET_vKill
]))
10155 case PACKET_UNKNOWN
:
10158 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
10162 /* Send a kill request to the target using the 'k' packet. */
10165 remote_target::remote_kill_k ()
10167 /* Catch errors so the user can quit from gdb even when we
10168 aren't on speaking terms with the remote system. */
10173 catch (const gdb_exception_error
&ex
)
10175 if (ex
.error
== TARGET_CLOSE_ERROR
)
10177 /* If we got an (EOF) error that caused the target
10178 to go away, then we're done, that's what we wanted.
10179 "k" is susceptible to cause a premature EOF, given
10180 that the remote server isn't actually required to
10181 reply to "k", and it can happen that it doesn't
10182 even get to reply ACK to the "k". */
10186 /* Otherwise, something went wrong. We didn't actually kill
10187 the target. Just propagate the exception, and let the
10188 user or higher layers decide what to do. */
10194 remote_target::mourn_inferior ()
10196 struct remote_state
*rs
= get_remote_state ();
10198 /* We're no longer interested in notification events of an inferior
10199 that exited or was killed/detached. */
10200 discard_pending_stop_replies (current_inferior ());
10202 /* In 'target remote' mode with one inferior, we close the connection. */
10203 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
10205 remote_unpush_target (this);
10209 /* In case we got here due to an error, but we're going to stay
10211 rs
->waiting_for_stop_reply
= 0;
10213 /* If the current general thread belonged to the process we just
10214 detached from or has exited, the remote side current general
10215 thread becomes undefined. Considering a case like this:
10217 - We just got here due to a detach.
10218 - The process that we're detaching from happens to immediately
10219 report a global breakpoint being hit in non-stop mode, in the
10220 same thread we had selected before.
10221 - GDB attaches to this process again.
10222 - This event happens to be the next event we handle.
10224 GDB would consider that the current general thread didn't need to
10225 be set on the stub side (with Hg), since for all it knew,
10226 GENERAL_THREAD hadn't changed.
10228 Notice that although in all-stop mode, the remote server always
10229 sets the current thread to the thread reporting the stop event,
10230 that doesn't happen in non-stop mode; in non-stop, the stub *must
10231 not* change the current thread when reporting a breakpoint hit,
10232 due to the decoupling of event reporting and event handling.
10234 To keep things simple, we always invalidate our notion of the
10236 record_currthread (rs
, minus_one_ptid
);
10238 /* Call common code to mark the inferior as not running. */
10239 generic_mourn_inferior ();
10243 extended_remote_target::supports_disable_randomization ()
10245 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
10249 remote_target::extended_remote_disable_randomization (int val
)
10251 struct remote_state
*rs
= get_remote_state ();
10254 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10255 "QDisableRandomization:%x", val
);
10257 reply
= remote_get_noisy_reply ();
10258 if (*reply
== '\0')
10259 error (_("Target does not support QDisableRandomization."));
10260 if (strcmp (reply
, "OK") != 0)
10261 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10265 remote_target::extended_remote_run (const std::string
&args
)
10267 struct remote_state
*rs
= get_remote_state ();
10269 const char *remote_exec_file
= get_remote_exec_file ();
10271 /* If the user has disabled vRun support, or we have detected that
10272 support is not available, do not try it. */
10273 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10276 strcpy (rs
->buf
.data (), "vRun;");
10277 len
= strlen (rs
->buf
.data ());
10279 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10280 error (_("Remote file name too long for run packet"));
10281 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10282 strlen (remote_exec_file
));
10284 if (!args
.empty ())
10288 gdb_argv
argv (args
.c_str ());
10289 for (i
= 0; argv
[i
] != NULL
; i
++)
10291 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10292 error (_("Argument list too long for run packet"));
10293 rs
->buf
[len
++] = ';';
10294 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10299 rs
->buf
[len
++] = '\0';
10302 getpkt (&rs
->buf
, 0);
10304 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10307 /* We have a wait response. All is well. */
10309 case PACKET_UNKNOWN
:
10312 if (remote_exec_file
[0] == '\0')
10313 error (_("Running the default executable on the remote target failed; "
10314 "try \"set remote exec-file\"?"));
10316 error (_("Running \"%s\" on the remote target failed"),
10319 gdb_assert_not_reached (_("bad switch"));
10323 /* Helper function to send set/unset environment packets. ACTION is
10324 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10325 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10329 remote_target::send_environment_packet (const char *action
,
10330 const char *packet
,
10333 remote_state
*rs
= get_remote_state ();
10335 /* Convert the environment variable to an hex string, which
10336 is the best format to be transmitted over the wire. */
10337 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10340 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10341 "%s:%s", packet
, encoded_value
.c_str ());
10344 getpkt (&rs
->buf
, 0);
10345 if (strcmp (rs
->buf
.data (), "OK") != 0)
10346 warning (_("Unable to %s environment variable '%s' on remote."),
10350 /* Helper function to handle the QEnvironment* packets. */
10353 remote_target::extended_remote_environment_support ()
10355 remote_state
*rs
= get_remote_state ();
10357 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10359 putpkt ("QEnvironmentReset");
10360 getpkt (&rs
->buf
, 0);
10361 if (strcmp (rs
->buf
.data (), "OK") != 0)
10362 warning (_("Unable to reset environment on remote."));
10365 gdb_environ
*e
= ¤t_inferior ()->environment
;
10367 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10368 for (const std::string
&el
: e
->user_set_env ())
10369 send_environment_packet ("set", "QEnvironmentHexEncoded",
10372 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10373 for (const std::string
&el
: e
->user_unset_env ())
10374 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10377 /* Helper function to set the current working directory for the
10378 inferior in the remote target. */
10381 remote_target::extended_remote_set_inferior_cwd ()
10383 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10385 const std::string
&inferior_cwd
= current_inferior ()->cwd ();
10386 remote_state
*rs
= get_remote_state ();
10388 if (!inferior_cwd
.empty ())
10390 std::string hexpath
10391 = bin2hex ((const gdb_byte
*) inferior_cwd
.data (),
10392 inferior_cwd
.size ());
10394 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10395 "QSetWorkingDir:%s", hexpath
.c_str ());
10399 /* An empty inferior_cwd means that the user wants us to
10400 reset the remote server's inferior's cwd. */
10401 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10402 "QSetWorkingDir:");
10406 getpkt (&rs
->buf
, 0);
10407 if (packet_ok (rs
->buf
,
10408 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10411 Remote replied unexpectedly while setting the inferior's working\n\
10418 /* In the extended protocol we want to be able to do things like
10419 "run" and have them basically work as expected. So we need
10420 a special create_inferior function. We support changing the
10421 executable file and the command line arguments, but not the
10425 extended_remote_target::create_inferior (const char *exec_file
,
10426 const std::string
&args
,
10427 char **env
, int from_tty
)
10431 struct remote_state
*rs
= get_remote_state ();
10432 const char *remote_exec_file
= get_remote_exec_file ();
10434 /* If running asynchronously, register the target file descriptor
10435 with the event loop. */
10436 if (target_can_async_p ())
10439 /* Disable address space randomization if requested (and supported). */
10440 if (supports_disable_randomization ())
10441 extended_remote_disable_randomization (disable_randomization
);
10443 /* If startup-with-shell is on, we inform gdbserver to start the
10444 remote inferior using a shell. */
10445 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10447 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10448 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10450 getpkt (&rs
->buf
, 0);
10451 if (strcmp (rs
->buf
.data (), "OK") != 0)
10453 Remote replied unexpectedly while setting startup-with-shell: %s"),
10457 extended_remote_environment_support ();
10459 extended_remote_set_inferior_cwd ();
10461 /* Now restart the remote server. */
10462 run_worked
= extended_remote_run (args
) != -1;
10465 /* vRun was not supported. Fail if we need it to do what the
10467 if (remote_exec_file
[0])
10468 error (_("Remote target does not support \"set remote exec-file\""));
10469 if (!args
.empty ())
10470 error (_("Remote target does not support \"set args\" or run ARGS"));
10472 /* Fall back to "R". */
10473 extended_remote_restart ();
10476 /* vRun's success return is a stop reply. */
10477 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10478 add_current_inferior_and_thread (stop_reply
);
10480 /* Get updated offsets, if the stub uses qOffsets. */
10485 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10486 the list of conditions (in agent expression bytecode format), if any, the
10487 target needs to evaluate. The output is placed into the packet buffer
10488 started from BUF and ended at BUF_END. */
10491 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10492 struct bp_target_info
*bp_tgt
, char *buf
,
10495 if (bp_tgt
->conditions
.empty ())
10498 buf
+= strlen (buf
);
10499 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10502 /* Send conditions to the target. */
10503 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10505 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10506 buf
+= strlen (buf
);
10507 for (int i
= 0; i
< aexpr
->len
; ++i
)
10508 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10515 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10516 struct bp_target_info
*bp_tgt
, char *buf
)
10518 if (bp_tgt
->tcommands
.empty ())
10521 buf
+= strlen (buf
);
10523 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10524 buf
+= strlen (buf
);
10526 /* Concatenate all the agent expressions that are commands into the
10528 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10530 sprintf (buf
, "X%x,", aexpr
->len
);
10531 buf
+= strlen (buf
);
10532 for (int i
= 0; i
< aexpr
->len
; ++i
)
10533 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10538 /* Insert a breakpoint. On targets that have software breakpoint
10539 support, we ask the remote target to do the work; on targets
10540 which don't, we insert a traditional memory breakpoint. */
10543 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10544 struct bp_target_info
*bp_tgt
)
10546 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10547 If it succeeds, then set the support to PACKET_ENABLE. If it
10548 fails, and the user has explicitly requested the Z support then
10549 report an error, otherwise, mark it disabled and go on. */
10551 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10553 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10554 struct remote_state
*rs
;
10557 /* Make sure the remote is pointing at the right process, if
10559 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10560 set_general_process ();
10562 rs
= get_remote_state ();
10563 p
= rs
->buf
.data ();
10564 endbuf
= p
+ get_remote_packet_size ();
10569 addr
= (ULONGEST
) remote_address_masked (addr
);
10570 p
+= hexnumstr (p
, addr
);
10571 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10573 if (supports_evaluation_of_breakpoint_conditions ())
10574 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10576 if (can_run_breakpoint_commands ())
10577 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10580 getpkt (&rs
->buf
, 0);
10582 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10588 case PACKET_UNKNOWN
:
10593 /* If this breakpoint has target-side commands but this stub doesn't
10594 support Z0 packets, throw error. */
10595 if (!bp_tgt
->tcommands
.empty ())
10596 throw_error (NOT_SUPPORTED_ERROR
, _("\
10597 Target doesn't support breakpoints that have target side commands."));
10599 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10603 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10604 struct bp_target_info
*bp_tgt
,
10605 enum remove_bp_reason reason
)
10607 CORE_ADDR addr
= bp_tgt
->placed_address
;
10608 struct remote_state
*rs
= get_remote_state ();
10610 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10612 char *p
= rs
->buf
.data ();
10613 char *endbuf
= p
+ get_remote_packet_size ();
10615 /* Make sure the remote is pointing at the right process, if
10617 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10618 set_general_process ();
10624 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10625 p
+= hexnumstr (p
, addr
);
10626 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10629 getpkt (&rs
->buf
, 0);
10631 return (rs
->buf
[0] == 'E');
10634 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10637 static enum Z_packet_type
10638 watchpoint_to_Z_packet (int type
)
10643 return Z_PACKET_WRITE_WP
;
10646 return Z_PACKET_READ_WP
;
10649 return Z_PACKET_ACCESS_WP
;
10652 internal_error (__FILE__
, __LINE__
,
10653 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10658 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10659 enum target_hw_bp_type type
, struct expression
*cond
)
10661 struct remote_state
*rs
= get_remote_state ();
10662 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10664 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10666 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10669 /* Make sure the remote is pointing at the right process, if
10671 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10672 set_general_process ();
10674 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10675 p
= strchr (rs
->buf
.data (), '\0');
10676 addr
= remote_address_masked (addr
);
10677 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10678 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10681 getpkt (&rs
->buf
, 0);
10683 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10687 case PACKET_UNKNOWN
:
10692 internal_error (__FILE__
, __LINE__
,
10693 _("remote_insert_watchpoint: reached end of function"));
10697 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10698 CORE_ADDR start
, int length
)
10700 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10702 return diff
< length
;
10707 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10708 enum target_hw_bp_type type
, struct expression
*cond
)
10710 struct remote_state
*rs
= get_remote_state ();
10711 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10713 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10715 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10718 /* Make sure the remote is pointing at the right process, if
10720 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10721 set_general_process ();
10723 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10724 p
= strchr (rs
->buf
.data (), '\0');
10725 addr
= remote_address_masked (addr
);
10726 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10727 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10729 getpkt (&rs
->buf
, 0);
10731 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10734 case PACKET_UNKNOWN
:
10739 internal_error (__FILE__
, __LINE__
,
10740 _("remote_remove_watchpoint: reached end of function"));
10744 static int remote_hw_watchpoint_limit
= -1;
10745 static int remote_hw_watchpoint_length_limit
= -1;
10746 static int remote_hw_breakpoint_limit
= -1;
10749 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10751 if (remote_hw_watchpoint_length_limit
== 0)
10753 else if (remote_hw_watchpoint_length_limit
< 0)
10755 else if (len
<= remote_hw_watchpoint_length_limit
)
10762 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10764 if (type
== bp_hardware_breakpoint
)
10766 if (remote_hw_breakpoint_limit
== 0)
10768 else if (remote_hw_breakpoint_limit
< 0)
10770 else if (cnt
<= remote_hw_breakpoint_limit
)
10775 if (remote_hw_watchpoint_limit
== 0)
10777 else if (remote_hw_watchpoint_limit
< 0)
10781 else if (cnt
<= remote_hw_watchpoint_limit
)
10787 /* The to_stopped_by_sw_breakpoint method of target remote. */
10790 remote_target::stopped_by_sw_breakpoint ()
10792 struct thread_info
*thread
= inferior_thread ();
10794 return (thread
->priv
!= NULL
10795 && (get_remote_thread_info (thread
)->stop_reason
10796 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10799 /* The to_supports_stopped_by_sw_breakpoint method of target
10803 remote_target::supports_stopped_by_sw_breakpoint ()
10805 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10808 /* The to_stopped_by_hw_breakpoint method of target remote. */
10811 remote_target::stopped_by_hw_breakpoint ()
10813 struct thread_info
*thread
= inferior_thread ();
10815 return (thread
->priv
!= NULL
10816 && (get_remote_thread_info (thread
)->stop_reason
10817 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10820 /* The to_supports_stopped_by_hw_breakpoint method of target
10824 remote_target::supports_stopped_by_hw_breakpoint ()
10826 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10830 remote_target::stopped_by_watchpoint ()
10832 struct thread_info
*thread
= inferior_thread ();
10834 return (thread
->priv
!= NULL
10835 && (get_remote_thread_info (thread
)->stop_reason
10836 == TARGET_STOPPED_BY_WATCHPOINT
));
10840 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10842 struct thread_info
*thread
= inferior_thread ();
10844 if (thread
->priv
!= NULL
10845 && (get_remote_thread_info (thread
)->stop_reason
10846 == TARGET_STOPPED_BY_WATCHPOINT
))
10848 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10857 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10858 struct bp_target_info
*bp_tgt
)
10860 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10861 struct remote_state
*rs
;
10865 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10868 /* Make sure the remote is pointing at the right process, if
10870 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10871 set_general_process ();
10873 rs
= get_remote_state ();
10874 p
= rs
->buf
.data ();
10875 endbuf
= p
+ get_remote_packet_size ();
10881 addr
= remote_address_masked (addr
);
10882 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10883 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10885 if (supports_evaluation_of_breakpoint_conditions ())
10886 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10888 if (can_run_breakpoint_commands ())
10889 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10892 getpkt (&rs
->buf
, 0);
10894 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10897 if (rs
->buf
[1] == '.')
10899 message
= strchr (&rs
->buf
[2], '.');
10901 error (_("Remote failure reply: %s"), message
+ 1);
10904 case PACKET_UNKNOWN
:
10909 internal_error (__FILE__
, __LINE__
,
10910 _("remote_insert_hw_breakpoint: reached end of function"));
10915 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10916 struct bp_target_info
*bp_tgt
)
10919 struct remote_state
*rs
= get_remote_state ();
10920 char *p
= rs
->buf
.data ();
10921 char *endbuf
= p
+ get_remote_packet_size ();
10923 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10926 /* Make sure the remote is pointing at the right process, if
10928 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10929 set_general_process ();
10935 addr
= remote_address_masked (bp_tgt
->placed_address
);
10936 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10937 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10940 getpkt (&rs
->buf
, 0);
10942 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10945 case PACKET_UNKNOWN
:
10950 internal_error (__FILE__
, __LINE__
,
10951 _("remote_remove_hw_breakpoint: reached end of function"));
10954 /* Verify memory using the "qCRC:" request. */
10957 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10959 struct remote_state
*rs
= get_remote_state ();
10960 unsigned long host_crc
, target_crc
;
10963 /* It doesn't make sense to use qCRC if the remote target is
10964 connected but not running. */
10965 if (target_has_execution ()
10966 && packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10968 enum packet_result result
;
10970 /* Make sure the remote is pointing at the right process. */
10971 set_general_process ();
10973 /* FIXME: assumes lma can fit into long. */
10974 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10975 (long) lma
, (long) size
);
10978 /* Be clever; compute the host_crc before waiting for target
10980 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10982 getpkt (&rs
->buf
, 0);
10984 result
= packet_ok (rs
->buf
,
10985 &remote_protocol_packets
[PACKET_qCRC
]);
10986 if (result
== PACKET_ERROR
)
10988 else if (result
== PACKET_OK
)
10990 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10991 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10993 return (host_crc
== target_crc
);
10997 return simple_verify_memory (this, data
, lma
, size
);
11000 /* compare-sections command
11002 With no arguments, compares each loadable section in the exec bfd
11003 with the same memory range on the target, and reports mismatches.
11004 Useful for verifying the image on the target against the exec file. */
11007 compare_sections_command (const char *args
, int from_tty
)
11010 const char *sectname
;
11011 bfd_size_type size
;
11014 int mismatched
= 0;
11018 if (!current_program_space
->exec_bfd ())
11019 error (_("command cannot be used without an exec file"));
11021 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
11027 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
11029 if (!(s
->flags
& SEC_LOAD
))
11030 continue; /* Skip non-loadable section. */
11032 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
11033 continue; /* Skip writeable sections */
11035 size
= bfd_section_size (s
);
11037 continue; /* Skip zero-length section. */
11039 sectname
= bfd_section_name (s
);
11040 if (args
&& strcmp (args
, sectname
) != 0)
11041 continue; /* Not the section selected by user. */
11043 matched
= 1; /* Do this section. */
11046 gdb::byte_vector
sectdata (size
);
11047 bfd_get_section_contents (current_program_space
->exec_bfd (), s
,
11048 sectdata
.data (), 0, size
);
11050 res
= target_verify_memory (sectdata
.data (), lma
, size
);
11053 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
11054 paddress (target_gdbarch (), lma
),
11055 paddress (target_gdbarch (), lma
+ size
));
11057 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
11058 paddress (target_gdbarch (), lma
),
11059 paddress (target_gdbarch (), lma
+ size
));
11061 printf_filtered ("matched.\n");
11064 printf_filtered ("MIS-MATCHED!\n");
11068 if (mismatched
> 0)
11069 warning (_("One or more sections of the target image does not match\n\
11070 the loaded file\n"));
11071 if (args
&& !matched
)
11072 printf_filtered (_("No loaded section named '%s'.\n"), args
);
11075 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
11076 into remote target. The number of bytes written to the remote
11077 target is returned, or -1 for error. */
11080 remote_target::remote_write_qxfer (const char *object_name
,
11081 const char *annex
, const gdb_byte
*writebuf
,
11082 ULONGEST offset
, LONGEST len
,
11083 ULONGEST
*xfered_len
,
11084 struct packet_config
*packet
)
11088 struct remote_state
*rs
= get_remote_state ();
11089 int max_size
= get_memory_write_packet_size ();
11091 if (packet_config_support (packet
) == PACKET_DISABLE
)
11092 return TARGET_XFER_E_IO
;
11094 /* Insert header. */
11095 i
= snprintf (rs
->buf
.data (), max_size
,
11096 "qXfer:%s:write:%s:%s:",
11097 object_name
, annex
? annex
: "",
11098 phex_nz (offset
, sizeof offset
));
11099 max_size
-= (i
+ 1);
11101 /* Escape as much data as fits into rs->buf. */
11102 buf_len
= remote_escape_output
11103 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
11105 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
11106 || getpkt_sane (&rs
->buf
, 0) < 0
11107 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11108 return TARGET_XFER_E_IO
;
11110 unpack_varlen_hex (rs
->buf
.data (), &n
);
11113 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11116 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
11117 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
11118 number of bytes read is returned, or 0 for EOF, or -1 for error.
11119 The number of bytes read may be less than LEN without indicating an
11120 EOF. PACKET is checked and updated to indicate whether the remote
11121 target supports this object. */
11124 remote_target::remote_read_qxfer (const char *object_name
,
11126 gdb_byte
*readbuf
, ULONGEST offset
,
11128 ULONGEST
*xfered_len
,
11129 struct packet_config
*packet
)
11131 struct remote_state
*rs
= get_remote_state ();
11132 LONGEST i
, n
, packet_len
;
11134 if (packet_config_support (packet
) == PACKET_DISABLE
)
11135 return TARGET_XFER_E_IO
;
11137 /* Check whether we've cached an end-of-object packet that matches
11139 if (rs
->finished_object
)
11141 if (strcmp (object_name
, rs
->finished_object
) == 0
11142 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
11143 && offset
== rs
->finished_offset
)
11144 return TARGET_XFER_EOF
;
11147 /* Otherwise, we're now reading something different. Discard
11149 xfree (rs
->finished_object
);
11150 xfree (rs
->finished_annex
);
11151 rs
->finished_object
= NULL
;
11152 rs
->finished_annex
= NULL
;
11155 /* Request only enough to fit in a single packet. The actual data
11156 may not, since we don't know how much of it will need to be escaped;
11157 the target is free to respond with slightly less data. We subtract
11158 five to account for the response type and the protocol frame. */
11159 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
11160 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
11161 "qXfer:%s:read:%s:%s,%s",
11162 object_name
, annex
? annex
: "",
11163 phex_nz (offset
, sizeof offset
),
11164 phex_nz (n
, sizeof n
));
11165 i
= putpkt (rs
->buf
);
11167 return TARGET_XFER_E_IO
;
11170 packet_len
= getpkt_sane (&rs
->buf
, 0);
11171 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11172 return TARGET_XFER_E_IO
;
11174 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
11175 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
11177 /* 'm' means there is (or at least might be) more data after this
11178 batch. That does not make sense unless there's at least one byte
11179 of data in this reply. */
11180 if (rs
->buf
[0] == 'm' && packet_len
== 1)
11181 error (_("Remote qXfer reply contained no data."));
11183 /* Got some data. */
11184 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
11185 packet_len
- 1, readbuf
, n
);
11187 /* 'l' is an EOF marker, possibly including a final block of data,
11188 or possibly empty. If we have the final block of a non-empty
11189 object, record this fact to bypass a subsequent partial read. */
11190 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
11192 rs
->finished_object
= xstrdup (object_name
);
11193 rs
->finished_annex
= xstrdup (annex
? annex
: "");
11194 rs
->finished_offset
= offset
+ i
;
11198 return TARGET_XFER_EOF
;
11202 return TARGET_XFER_OK
;
11206 enum target_xfer_status
11207 remote_target::xfer_partial (enum target_object object
,
11208 const char *annex
, gdb_byte
*readbuf
,
11209 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
11210 ULONGEST
*xfered_len
)
11212 struct remote_state
*rs
;
11216 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
11218 set_remote_traceframe ();
11219 set_general_thread (inferior_ptid
);
11221 rs
= get_remote_state ();
11223 /* Handle memory using the standard memory routines. */
11224 if (object
== TARGET_OBJECT_MEMORY
)
11226 /* If the remote target is connected but not running, we should
11227 pass this request down to a lower stratum (e.g. the executable
11229 if (!target_has_execution ())
11230 return TARGET_XFER_EOF
;
11232 if (writebuf
!= NULL
)
11233 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
11236 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
11240 /* Handle extra signal info using qxfer packets. */
11241 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
11244 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
11245 xfered_len
, &remote_protocol_packets
11246 [PACKET_qXfer_siginfo_read
]);
11248 return remote_write_qxfer ("siginfo", annex
,
11249 writebuf
, offset
, len
, xfered_len
,
11250 &remote_protocol_packets
11251 [PACKET_qXfer_siginfo_write
]);
11254 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
11257 return remote_read_qxfer ("statictrace", annex
,
11258 readbuf
, offset
, len
, xfered_len
,
11259 &remote_protocol_packets
11260 [PACKET_qXfer_statictrace_read
]);
11262 return TARGET_XFER_E_IO
;
11265 /* Only handle flash writes. */
11266 if (writebuf
!= NULL
)
11270 case TARGET_OBJECT_FLASH
:
11271 return remote_flash_write (offset
, len
, xfered_len
,
11275 return TARGET_XFER_E_IO
;
11279 /* Map pre-existing objects onto letters. DO NOT do this for new
11280 objects!!! Instead specify new query packets. */
11283 case TARGET_OBJECT_AVR
:
11287 case TARGET_OBJECT_AUXV
:
11288 gdb_assert (annex
== NULL
);
11289 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
11291 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
11293 case TARGET_OBJECT_AVAILABLE_FEATURES
:
11294 return remote_read_qxfer
11295 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
11296 &remote_protocol_packets
[PACKET_qXfer_features
]);
11298 case TARGET_OBJECT_LIBRARIES
:
11299 return remote_read_qxfer
11300 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
11301 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
11303 case TARGET_OBJECT_LIBRARIES_SVR4
:
11304 return remote_read_qxfer
11305 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
11306 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
11308 case TARGET_OBJECT_MEMORY_MAP
:
11309 gdb_assert (annex
== NULL
);
11310 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
11312 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
11314 case TARGET_OBJECT_OSDATA
:
11315 /* Should only get here if we're connected. */
11316 gdb_assert (rs
->remote_desc
);
11317 return remote_read_qxfer
11318 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
11319 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
11321 case TARGET_OBJECT_THREADS
:
11322 gdb_assert (annex
== NULL
);
11323 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
11325 &remote_protocol_packets
[PACKET_qXfer_threads
]);
11327 case TARGET_OBJECT_TRACEFRAME_INFO
:
11328 gdb_assert (annex
== NULL
);
11329 return remote_read_qxfer
11330 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11331 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11333 case TARGET_OBJECT_FDPIC
:
11334 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11336 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11338 case TARGET_OBJECT_OPENVMS_UIB
:
11339 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11341 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11343 case TARGET_OBJECT_BTRACE
:
11344 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11346 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11348 case TARGET_OBJECT_BTRACE_CONF
:
11349 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11351 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11353 case TARGET_OBJECT_EXEC_FILE
:
11354 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11356 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11359 return TARGET_XFER_E_IO
;
11362 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11363 large enough let the caller deal with it. */
11364 if (len
< get_remote_packet_size ())
11365 return TARGET_XFER_E_IO
;
11366 len
= get_remote_packet_size ();
11368 /* Except for querying the minimum buffer size, target must be open. */
11369 if (!rs
->remote_desc
)
11370 error (_("remote query is only available after target open"));
11372 gdb_assert (annex
!= NULL
);
11373 gdb_assert (readbuf
!= NULL
);
11375 p2
= rs
->buf
.data ();
11377 *p2
++ = query_type
;
11379 /* We used one buffer char for the remote protocol q command and
11380 another for the query type. As the remote protocol encapsulation
11381 uses 4 chars plus one extra in case we are debugging
11382 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11385 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11387 /* Bad caller may have sent forbidden characters. */
11388 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11393 gdb_assert (annex
[i
] == '\0');
11395 i
= putpkt (rs
->buf
);
11397 return TARGET_XFER_E_IO
;
11399 getpkt (&rs
->buf
, 0);
11400 strcpy ((char *) readbuf
, rs
->buf
.data ());
11402 *xfered_len
= strlen ((char *) readbuf
);
11403 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11406 /* Implementation of to_get_memory_xfer_limit. */
11409 remote_target::get_memory_xfer_limit ()
11411 return get_memory_write_packet_size ();
11415 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11416 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11417 CORE_ADDR
*found_addrp
)
11419 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11420 struct remote_state
*rs
= get_remote_state ();
11421 int max_size
= get_memory_write_packet_size ();
11422 struct packet_config
*packet
=
11423 &remote_protocol_packets
[PACKET_qSearch_memory
];
11424 /* Number of packet bytes used to encode the pattern;
11425 this could be more than PATTERN_LEN due to escape characters. */
11426 int escaped_pattern_len
;
11427 /* Amount of pattern that was encodable in the packet. */
11428 int used_pattern_len
;
11431 ULONGEST found_addr
;
11433 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
11435 return (target_read (this, TARGET_OBJECT_MEMORY
, NULL
, result
, addr
, len
)
11439 /* Don't go to the target if we don't have to. This is done before
11440 checking packet_config_support to avoid the possibility that a
11441 success for this edge case means the facility works in
11443 if (pattern_len
> search_space_len
)
11445 if (pattern_len
== 0)
11447 *found_addrp
= start_addr
;
11451 /* If we already know the packet isn't supported, fall back to the simple
11452 way of searching memory. */
11454 if (packet_config_support (packet
) == PACKET_DISABLE
)
11456 /* Target doesn't provided special support, fall back and use the
11457 standard support (copy memory and do the search here). */
11458 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11459 pattern
, pattern_len
, found_addrp
);
11462 /* Make sure the remote is pointing at the right process. */
11463 set_general_process ();
11465 /* Insert header. */
11466 i
= snprintf (rs
->buf
.data (), max_size
,
11467 "qSearch:memory:%s;%s;",
11468 phex_nz (start_addr
, addr_size
),
11469 phex_nz (search_space_len
, sizeof (search_space_len
)));
11470 max_size
-= (i
+ 1);
11472 /* Escape as much data as fits into rs->buf. */
11473 escaped_pattern_len
=
11474 remote_escape_output (pattern
, pattern_len
, 1,
11475 (gdb_byte
*) rs
->buf
.data () + i
,
11476 &used_pattern_len
, max_size
);
11478 /* Bail if the pattern is too large. */
11479 if (used_pattern_len
!= pattern_len
)
11480 error (_("Pattern is too large to transmit to remote target."));
11482 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11483 || getpkt_sane (&rs
->buf
, 0) < 0
11484 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11486 /* The request may not have worked because the command is not
11487 supported. If so, fall back to the simple way. */
11488 if (packet_config_support (packet
) == PACKET_DISABLE
)
11490 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11491 pattern
, pattern_len
, found_addrp
);
11496 if (rs
->buf
[0] == '0')
11498 else if (rs
->buf
[0] == '1')
11501 if (rs
->buf
[1] != ',')
11502 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11503 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11504 *found_addrp
= found_addr
;
11507 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11513 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11515 struct remote_state
*rs
= get_remote_state ();
11516 char *p
= rs
->buf
.data ();
11518 if (!rs
->remote_desc
)
11519 error (_("remote rcmd is only available after target open"));
11521 /* Send a NULL command across as an empty command. */
11522 if (command
== NULL
)
11525 /* The query prefix. */
11526 strcpy (rs
->buf
.data (), "qRcmd,");
11527 p
= strchr (rs
->buf
.data (), '\0');
11529 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11530 > get_remote_packet_size ())
11531 error (_("\"monitor\" command ``%s'' is too long."), command
);
11533 /* Encode the actual command. */
11534 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11536 if (putpkt (rs
->buf
) < 0)
11537 error (_("Communication problem with target."));
11539 /* get/display the response */
11544 /* XXX - see also remote_get_noisy_reply(). */
11545 QUIT
; /* Allow user to bail out with ^C. */
11547 if (getpkt_sane (&rs
->buf
, 0) == -1)
11549 /* Timeout. Continue to (try to) read responses.
11550 This is better than stopping with an error, assuming the stub
11551 is still executing the (long) monitor command.
11552 If needed, the user can interrupt gdb using C-c, obtaining
11553 an effect similar to stop on timeout. */
11556 buf
= rs
->buf
.data ();
11557 if (buf
[0] == '\0')
11558 error (_("Target does not support this command."));
11559 if (buf
[0] == 'O' && buf
[1] != 'K')
11561 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11564 if (strcmp (buf
, "OK") == 0)
11566 if (strlen (buf
) == 3 && buf
[0] == 'E'
11567 && isdigit (buf
[1]) && isdigit (buf
[2]))
11569 error (_("Protocol error with Rcmd"));
11571 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11573 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11575 fputc_unfiltered (c
, outbuf
);
11581 std::vector
<mem_region
>
11582 remote_target::memory_map ()
11584 std::vector
<mem_region
> result
;
11585 gdb::optional
<gdb::char_vector
> text
11586 = target_read_stralloc (current_inferior ()->top_target (),
11587 TARGET_OBJECT_MEMORY_MAP
, NULL
);
11590 result
= parse_memory_map (text
->data ());
11596 packet_command (const char *args
, int from_tty
)
11598 remote_target
*remote
= get_current_remote_target ();
11600 if (remote
== nullptr)
11601 error (_("command can only be used with remote target"));
11603 remote
->packet_command (args
, from_tty
);
11607 remote_target::packet_command (const char *args
, int from_tty
)
11610 error (_("remote-packet command requires packet text as argument"));
11612 puts_filtered ("sending: ");
11613 print_packet (args
);
11614 puts_filtered ("\n");
11617 remote_state
*rs
= get_remote_state ();
11619 getpkt (&rs
->buf
, 0);
11620 puts_filtered ("received: ");
11621 print_packet (rs
->buf
.data ());
11622 puts_filtered ("\n");
11626 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11628 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11630 static void threadset_test_cmd (char *cmd
, int tty
);
11632 static void threadalive_test (char *cmd
, int tty
);
11634 static void threadlist_test_cmd (char *cmd
, int tty
);
11636 int get_and_display_threadinfo (threadref
*ref
);
11638 static void threadinfo_test_cmd (char *cmd
, int tty
);
11640 static int thread_display_step (threadref
*ref
, void *context
);
11642 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11644 static void init_remote_threadtests (void);
11646 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11649 threadset_test_cmd (const char *cmd
, int tty
)
11651 int sample_thread
= SAMPLE_THREAD
;
11653 printf_filtered (_("Remote threadset test\n"));
11654 set_general_thread (sample_thread
);
11659 threadalive_test (const char *cmd
, int tty
)
11661 int sample_thread
= SAMPLE_THREAD
;
11662 int pid
= inferior_ptid
.pid ();
11663 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11665 if (remote_thread_alive (ptid
))
11666 printf_filtered ("PASS: Thread alive test\n");
11668 printf_filtered ("FAIL: Thread alive test\n");
11671 void output_threadid (char *title
, threadref
*ref
);
11674 output_threadid (char *title
, threadref
*ref
)
11678 pack_threadid (&hexid
[0], ref
); /* Convert thread id into hex. */
11680 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11684 threadlist_test_cmd (const char *cmd
, int tty
)
11687 threadref nextthread
;
11688 int done
, result_count
;
11689 threadref threadlist
[3];
11691 printf_filtered ("Remote Threadlist test\n");
11692 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11693 &result_count
, &threadlist
[0]))
11694 printf_filtered ("FAIL: threadlist test\n");
11697 threadref
*scan
= threadlist
;
11698 threadref
*limit
= scan
+ result_count
;
11700 while (scan
< limit
)
11701 output_threadid (" thread ", scan
++);
11706 display_thread_info (struct gdb_ext_thread_info
*info
)
11708 output_threadid ("Threadid: ", &info
->threadid
);
11709 printf_filtered ("Name: %s\n ", info
->shortname
);
11710 printf_filtered ("State: %s\n", info
->display
);
11711 printf_filtered ("other: %s\n\n", info
->more_display
);
11715 get_and_display_threadinfo (threadref
*ref
)
11719 struct gdb_ext_thread_info threadinfo
;
11721 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11722 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11723 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11724 display_thread_info (&threadinfo
);
11729 threadinfo_test_cmd (const char *cmd
, int tty
)
11731 int athread
= SAMPLE_THREAD
;
11735 int_to_threadref (&thread
, athread
);
11736 printf_filtered ("Remote Threadinfo test\n");
11737 if (!get_and_display_threadinfo (&thread
))
11738 printf_filtered ("FAIL cannot get thread info\n");
11742 thread_display_step (threadref
*ref
, void *context
)
11744 /* output_threadid(" threadstep ",ref); *//* simple test */
11745 return get_and_display_threadinfo (ref
);
11749 threadlist_update_test_cmd (const char *cmd
, int tty
)
11751 printf_filtered ("Remote Threadlist update test\n");
11752 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11756 init_remote_threadtests (void)
11758 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11759 _("Fetch and print the remote list of "
11760 "thread identifiers, one pkt only."));
11761 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11762 _("Fetch and display info about one thread."));
11763 add_com ("tset", class_obscure
, threadset_test_cmd
,
11764 _("Test setting to a different thread."));
11765 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11766 _("Iterate through updating all remote thread info."));
11767 add_com ("talive", class_obscure
, threadalive_test
,
11768 _("Remote thread alive test."));
11773 /* Convert a thread ID to a string. */
11776 remote_target::pid_to_str (ptid_t ptid
)
11778 struct remote_state
*rs
= get_remote_state ();
11780 if (ptid
== null_ptid
)
11781 return normal_pid_to_str (ptid
);
11782 else if (ptid
.is_pid ())
11784 /* Printing an inferior target id. */
11786 /* When multi-process extensions are off, there's no way in the
11787 remote protocol to know the remote process id, if there's any
11788 at all. There's one exception --- when we're connected with
11789 target extended-remote, and we manually attached to a process
11790 with "attach PID". We don't record anywhere a flag that
11791 allows us to distinguish that case from the case of
11792 connecting with extended-remote and the stub already being
11793 attached to a process, and reporting yes to qAttached, hence
11794 no smart special casing here. */
11795 if (!remote_multi_process_p (rs
))
11796 return "Remote target";
11798 return normal_pid_to_str (ptid
);
11802 if (magic_null_ptid
== ptid
)
11803 return "Thread <main>";
11804 else if (remote_multi_process_p (rs
))
11805 if (ptid
.lwp () == 0)
11806 return normal_pid_to_str (ptid
);
11808 return string_printf ("Thread %d.%ld",
11809 ptid
.pid (), ptid
.lwp ());
11811 return string_printf ("Thread %ld", ptid
.lwp ());
11815 /* Get the address of the thread local variable in OBJFILE which is
11816 stored at OFFSET within the thread local storage for thread PTID. */
11819 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11822 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11824 struct remote_state
*rs
= get_remote_state ();
11825 char *p
= rs
->buf
.data ();
11826 char *endp
= p
+ get_remote_packet_size ();
11827 enum packet_result result
;
11829 strcpy (p
, "qGetTLSAddr:");
11831 p
= write_ptid (p
, endp
, ptid
);
11833 p
+= hexnumstr (p
, offset
);
11835 p
+= hexnumstr (p
, lm
);
11839 getpkt (&rs
->buf
, 0);
11840 result
= packet_ok (rs
->buf
,
11841 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11842 if (result
== PACKET_OK
)
11846 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11849 else if (result
== PACKET_UNKNOWN
)
11850 throw_error (TLS_GENERIC_ERROR
,
11851 _("Remote target doesn't support qGetTLSAddr packet"));
11853 throw_error (TLS_GENERIC_ERROR
,
11854 _("Remote target failed to process qGetTLSAddr request"));
11857 throw_error (TLS_GENERIC_ERROR
,
11858 _("TLS not supported or disabled on this target"));
11863 /* Provide thread local base, i.e. Thread Information Block address.
11864 Returns 1 if ptid is found and thread_local_base is non zero. */
11867 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11869 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11871 struct remote_state
*rs
= get_remote_state ();
11872 char *p
= rs
->buf
.data ();
11873 char *endp
= p
+ get_remote_packet_size ();
11874 enum packet_result result
;
11876 strcpy (p
, "qGetTIBAddr:");
11878 p
= write_ptid (p
, endp
, ptid
);
11882 getpkt (&rs
->buf
, 0);
11883 result
= packet_ok (rs
->buf
,
11884 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11885 if (result
== PACKET_OK
)
11888 unpack_varlen_hex (rs
->buf
.data (), &val
);
11890 *addr
= (CORE_ADDR
) val
;
11893 else if (result
== PACKET_UNKNOWN
)
11894 error (_("Remote target doesn't support qGetTIBAddr packet"));
11896 error (_("Remote target failed to process qGetTIBAddr request"));
11899 error (_("qGetTIBAddr not supported or disabled on this target"));
11904 /* Support for inferring a target description based on the current
11905 architecture and the size of a 'g' packet. While the 'g' packet
11906 can have any size (since optional registers can be left off the
11907 end), some sizes are easily recognizable given knowledge of the
11908 approximate architecture. */
11910 struct remote_g_packet_guess
11912 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11919 const struct target_desc
*tdesc
;
11922 struct remote_g_packet_data
: public allocate_on_obstack
11924 std::vector
<remote_g_packet_guess
> guesses
;
11927 static struct gdbarch_data
*remote_g_packet_data_handle
;
11930 remote_g_packet_data_init (struct obstack
*obstack
)
11932 return new (obstack
) remote_g_packet_data
;
11936 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11937 const struct target_desc
*tdesc
)
11939 struct remote_g_packet_data
*data
11940 = ((struct remote_g_packet_data
*)
11941 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11943 gdb_assert (tdesc
!= NULL
);
11945 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11946 if (guess
.bytes
== bytes
)
11947 internal_error (__FILE__
, __LINE__
,
11948 _("Duplicate g packet description added for size %d"),
11951 data
->guesses
.emplace_back (bytes
, tdesc
);
11954 /* Return true if remote_read_description would do anything on this target
11955 and architecture, false otherwise. */
11958 remote_read_description_p (struct target_ops
*target
)
11960 struct remote_g_packet_data
*data
11961 = ((struct remote_g_packet_data
*)
11962 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11964 return !data
->guesses
.empty ();
11967 const struct target_desc
*
11968 remote_target::read_description ()
11970 struct remote_g_packet_data
*data
11971 = ((struct remote_g_packet_data
*)
11972 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11974 /* Do not try this during initial connection, when we do not know
11975 whether there is a running but stopped thread. */
11976 if (!target_has_execution () || inferior_ptid
== null_ptid
)
11977 return beneath ()->read_description ();
11979 if (!data
->guesses
.empty ())
11981 int bytes
= send_g_packet ();
11983 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11984 if (guess
.bytes
== bytes
)
11985 return guess
.tdesc
;
11987 /* We discard the g packet. A minor optimization would be to
11988 hold on to it, and fill the register cache once we have selected
11989 an architecture, but it's too tricky to do safely. */
11992 return beneath ()->read_description ();
11995 /* Remote file transfer support. This is host-initiated I/O, not
11996 target-initiated; for target-initiated, see remote-fileio.c. */
11998 /* If *LEFT is at least the length of STRING, copy STRING to
11999 *BUFFER, update *BUFFER to point to the new end of the buffer, and
12000 decrease *LEFT. Otherwise raise an error. */
12003 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
12005 int len
= strlen (string
);
12008 error (_("Packet too long for target."));
12010 memcpy (*buffer
, string
, len
);
12014 /* NUL-terminate the buffer as a convenience, if there is
12020 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
12021 *BUFFER, update *BUFFER to point to the new end of the buffer, and
12022 decrease *LEFT. Otherwise raise an error. */
12025 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
12028 if (2 * len
> *left
)
12029 error (_("Packet too long for target."));
12031 bin2hex (bytes
, *buffer
, len
);
12032 *buffer
+= 2 * len
;
12035 /* NUL-terminate the buffer as a convenience, if there is
12041 /* If *LEFT is large enough, convert VALUE to hex and add it to
12042 *BUFFER, update *BUFFER to point to the new end of the buffer, and
12043 decrease *LEFT. Otherwise raise an error. */
12046 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
12048 int len
= hexnumlen (value
);
12051 error (_("Packet too long for target."));
12053 hexnumstr (*buffer
, value
);
12057 /* NUL-terminate the buffer as a convenience, if there is
12063 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
12064 value, *REMOTE_ERRNO to the remote error number or zero if none
12065 was included, and *ATTACHMENT to point to the start of the annex
12066 if any. The length of the packet isn't needed here; there may
12067 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
12069 Return 0 if the packet could be parsed, -1 if it could not. If
12070 -1 is returned, the other variables may not be initialized. */
12073 remote_hostio_parse_result (const char *buffer
, int *retcode
,
12074 int *remote_errno
, const char **attachment
)
12079 *attachment
= NULL
;
12081 if (buffer
[0] != 'F')
12085 *retcode
= strtol (&buffer
[1], &p
, 16);
12086 if (errno
!= 0 || p
== &buffer
[1])
12089 /* Check for ",errno". */
12093 *remote_errno
= strtol (p
+ 1, &p2
, 16);
12094 if (errno
!= 0 || p
+ 1 == p2
)
12099 /* Check for ";attachment". If there is no attachment, the
12100 packet should end here. */
12103 *attachment
= p
+ 1;
12106 else if (*p
== '\0')
12112 /* Send a prepared I/O packet to the target and read its response.
12113 The prepared packet is in the global RS->BUF before this function
12114 is called, and the answer is there when we return.
12116 COMMAND_BYTES is the length of the request to send, which may include
12117 binary data. WHICH_PACKET is the packet configuration to check
12118 before attempting a packet. If an error occurs, *REMOTE_ERRNO
12119 is set to the error number and -1 is returned. Otherwise the value
12120 returned by the function is returned.
12122 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
12123 attachment is expected; an error will be reported if there's a
12124 mismatch. If one is found, *ATTACHMENT will be set to point into
12125 the packet buffer and *ATTACHMENT_LEN will be set to the
12126 attachment's length. */
12129 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
12130 int *remote_errno
, const char **attachment
,
12131 int *attachment_len
)
12133 struct remote_state
*rs
= get_remote_state ();
12134 int ret
, bytes_read
;
12135 const char *attachment_tmp
;
12137 if (packet_support (which_packet
) == PACKET_DISABLE
)
12139 *remote_errno
= FILEIO_ENOSYS
;
12143 putpkt_binary (rs
->buf
.data (), command_bytes
);
12144 bytes_read
= getpkt_sane (&rs
->buf
, 0);
12146 /* If it timed out, something is wrong. Don't try to parse the
12148 if (bytes_read
< 0)
12150 *remote_errno
= FILEIO_EINVAL
;
12154 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
12157 *remote_errno
= FILEIO_EINVAL
;
12159 case PACKET_UNKNOWN
:
12160 *remote_errno
= FILEIO_ENOSYS
;
12166 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
12169 *remote_errno
= FILEIO_EINVAL
;
12173 /* Make sure we saw an attachment if and only if we expected one. */
12174 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
12175 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
12177 *remote_errno
= FILEIO_EINVAL
;
12181 /* If an attachment was found, it must point into the packet buffer;
12182 work out how many bytes there were. */
12183 if (attachment_tmp
!= NULL
)
12185 *attachment
= attachment_tmp
;
12186 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
12192 /* See declaration.h. */
12195 readahead_cache::invalidate ()
12200 /* See declaration.h. */
12203 readahead_cache::invalidate_fd (int fd
)
12205 if (this->fd
== fd
)
12209 /* Set the filesystem remote_hostio functions that take FILENAME
12210 arguments will use. Return 0 on success, or -1 if an error
12211 occurs (and set *REMOTE_ERRNO). */
12214 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
12217 struct remote_state
*rs
= get_remote_state ();
12218 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
12219 char *p
= rs
->buf
.data ();
12220 int left
= get_remote_packet_size () - 1;
12224 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12227 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
12230 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
12232 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
12233 remote_buffer_add_string (&p
, &left
, arg
);
12235 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
12236 remote_errno
, NULL
, NULL
);
12238 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12242 rs
->fs_pid
= required_pid
;
12247 /* Implementation of to_fileio_open. */
12250 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
12251 int flags
, int mode
, int warn_if_slow
,
12254 struct remote_state
*rs
= get_remote_state ();
12255 char *p
= rs
->buf
.data ();
12256 int left
= get_remote_packet_size () - 1;
12260 static int warning_issued
= 0;
12262 printf_unfiltered (_("Reading %s from remote target...\n"),
12265 if (!warning_issued
)
12267 warning (_("File transfers from remote targets can be slow."
12268 " Use \"set sysroot\" to access files locally"
12270 warning_issued
= 1;
12274 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12277 remote_buffer_add_string (&p
, &left
, "vFile:open:");
12279 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12280 strlen (filename
));
12281 remote_buffer_add_string (&p
, &left
, ",");
12283 remote_buffer_add_int (&p
, &left
, flags
);
12284 remote_buffer_add_string (&p
, &left
, ",");
12286 remote_buffer_add_int (&p
, &left
, mode
);
12288 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
12289 remote_errno
, NULL
, NULL
);
12293 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
12294 int flags
, int mode
, int warn_if_slow
,
12297 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
12301 /* Implementation of to_fileio_pwrite. */
12304 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12305 ULONGEST offset
, int *remote_errno
)
12307 struct remote_state
*rs
= get_remote_state ();
12308 char *p
= rs
->buf
.data ();
12309 int left
= get_remote_packet_size ();
12312 rs
->readahead_cache
.invalidate_fd (fd
);
12314 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
12316 remote_buffer_add_int (&p
, &left
, fd
);
12317 remote_buffer_add_string (&p
, &left
, ",");
12319 remote_buffer_add_int (&p
, &left
, offset
);
12320 remote_buffer_add_string (&p
, &left
, ",");
12322 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
12323 (get_remote_packet_size ()
12324 - (p
- rs
->buf
.data ())));
12326 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
12327 remote_errno
, NULL
, NULL
);
12331 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12332 ULONGEST offset
, int *remote_errno
)
12334 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12337 /* Helper for the implementation of to_fileio_pread. Read the file
12338 from the remote side with vFile:pread. */
12341 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12342 ULONGEST offset
, int *remote_errno
)
12344 struct remote_state
*rs
= get_remote_state ();
12345 char *p
= rs
->buf
.data ();
12346 const char *attachment
;
12347 int left
= get_remote_packet_size ();
12348 int ret
, attachment_len
;
12351 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12353 remote_buffer_add_int (&p
, &left
, fd
);
12354 remote_buffer_add_string (&p
, &left
, ",");
12356 remote_buffer_add_int (&p
, &left
, len
);
12357 remote_buffer_add_string (&p
, &left
, ",");
12359 remote_buffer_add_int (&p
, &left
, offset
);
12361 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
12362 remote_errno
, &attachment
,
12368 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12370 if (read_len
!= ret
)
12371 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12376 /* See declaration.h. */
12379 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12383 && this->offset
<= offset
12384 && offset
< this->offset
+ this->bufsize
)
12386 ULONGEST max
= this->offset
+ this->bufsize
;
12388 if (offset
+ len
> max
)
12389 len
= max
- offset
;
12391 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12398 /* Implementation of to_fileio_pread. */
12401 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12402 ULONGEST offset
, int *remote_errno
)
12405 struct remote_state
*rs
= get_remote_state ();
12406 readahead_cache
*cache
= &rs
->readahead_cache
;
12408 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12411 cache
->hit_count
++;
12413 remote_debug_printf ("readahead cache hit %s",
12414 pulongest (cache
->hit_count
));
12418 cache
->miss_count
++;
12420 remote_debug_printf ("readahead cache miss %s",
12421 pulongest (cache
->miss_count
));
12424 cache
->offset
= offset
;
12425 cache
->bufsize
= get_remote_packet_size ();
12426 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12428 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12429 cache
->offset
, remote_errno
);
12432 cache
->invalidate_fd (fd
);
12436 cache
->bufsize
= ret
;
12437 return cache
->pread (fd
, read_buf
, len
, offset
);
12441 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12442 ULONGEST offset
, int *remote_errno
)
12444 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12447 /* Implementation of to_fileio_close. */
12450 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12452 struct remote_state
*rs
= get_remote_state ();
12453 char *p
= rs
->buf
.data ();
12454 int left
= get_remote_packet_size () - 1;
12456 rs
->readahead_cache
.invalidate_fd (fd
);
12458 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12460 remote_buffer_add_int (&p
, &left
, fd
);
12462 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12463 remote_errno
, NULL
, NULL
);
12467 remote_target::fileio_close (int fd
, int *remote_errno
)
12469 return remote_hostio_close (fd
, remote_errno
);
12472 /* Implementation of to_fileio_unlink. */
12475 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12478 struct remote_state
*rs
= get_remote_state ();
12479 char *p
= rs
->buf
.data ();
12480 int left
= get_remote_packet_size () - 1;
12482 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12485 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12487 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12488 strlen (filename
));
12490 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12491 remote_errno
, NULL
, NULL
);
12495 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12498 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12501 /* Implementation of to_fileio_readlink. */
12503 gdb::optional
<std::string
>
12504 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12507 struct remote_state
*rs
= get_remote_state ();
12508 char *p
= rs
->buf
.data ();
12509 const char *attachment
;
12510 int left
= get_remote_packet_size ();
12511 int len
, attachment_len
;
12514 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12517 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12519 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12520 strlen (filename
));
12522 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12523 remote_errno
, &attachment
,
12529 std::string
ret (len
, '\0');
12531 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12532 (gdb_byte
*) &ret
[0], len
);
12533 if (read_len
!= len
)
12534 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12539 /* Implementation of to_fileio_fstat. */
12542 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12544 struct remote_state
*rs
= get_remote_state ();
12545 char *p
= rs
->buf
.data ();
12546 int left
= get_remote_packet_size ();
12547 int attachment_len
, ret
;
12548 const char *attachment
;
12549 struct fio_stat fst
;
12552 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12554 remote_buffer_add_int (&p
, &left
, fd
);
12556 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12557 remote_errno
, &attachment
,
12561 if (*remote_errno
!= FILEIO_ENOSYS
)
12564 /* Strictly we should return -1, ENOSYS here, but when
12565 "set sysroot remote:" was implemented in August 2008
12566 BFD's need for a stat function was sidestepped with
12567 this hack. This was not remedied until March 2015
12568 so we retain the previous behavior to avoid breaking
12571 Note that the memset is a March 2015 addition; older
12572 GDBs set st_size *and nothing else* so the structure
12573 would have garbage in all other fields. This might
12574 break something but retaining the previous behavior
12575 here would be just too wrong. */
12577 memset (st
, 0, sizeof (struct stat
));
12578 st
->st_size
= INT_MAX
;
12582 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12583 (gdb_byte
*) &fst
, sizeof (fst
));
12585 if (read_len
!= ret
)
12586 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12588 if (read_len
!= sizeof (fst
))
12589 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12590 read_len
, (int) sizeof (fst
));
12592 remote_fileio_to_host_stat (&fst
, st
);
12597 /* Implementation of to_filesystem_is_local. */
12600 remote_target::filesystem_is_local ()
12602 /* Valgrind GDB presents itself as a remote target but works
12603 on the local filesystem: it does not implement remote get
12604 and users are not expected to set a sysroot. To handle
12605 this case we treat the remote filesystem as local if the
12606 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12607 does not support vFile:open. */
12608 if (gdb_sysroot
== TARGET_SYSROOT_PREFIX
)
12610 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12612 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12614 int fd
, remote_errno
;
12616 /* Try opening a file to probe support. The supplied
12617 filename is irrelevant, we only care about whether
12618 the stub recognizes the packet or not. */
12619 fd
= remote_hostio_open (NULL
, "just probing",
12620 FILEIO_O_RDONLY
, 0700, 0,
12624 remote_hostio_close (fd
, &remote_errno
);
12626 ps
= packet_support (PACKET_vFile_open
);
12629 if (ps
== PACKET_DISABLE
)
12631 static int warning_issued
= 0;
12633 if (!warning_issued
)
12635 warning (_("remote target does not support file"
12636 " transfer, attempting to access files"
12637 " from local filesystem."));
12638 warning_issued
= 1;
12649 remote_fileio_errno_to_host (int errnum
)
12655 case FILEIO_ENOENT
:
12663 case FILEIO_EACCES
:
12665 case FILEIO_EFAULT
:
12669 case FILEIO_EEXIST
:
12671 case FILEIO_ENODEV
:
12673 case FILEIO_ENOTDIR
:
12675 case FILEIO_EISDIR
:
12677 case FILEIO_EINVAL
:
12679 case FILEIO_ENFILE
:
12681 case FILEIO_EMFILE
:
12685 case FILEIO_ENOSPC
:
12687 case FILEIO_ESPIPE
:
12691 case FILEIO_ENOSYS
:
12693 case FILEIO_ENAMETOOLONG
:
12694 return ENAMETOOLONG
;
12700 remote_hostio_error (int errnum
)
12702 int host_error
= remote_fileio_errno_to_host (errnum
);
12704 if (host_error
== -1)
12705 error (_("Unknown remote I/O error %d"), errnum
);
12707 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12710 /* A RAII wrapper around a remote file descriptor. */
12712 class scoped_remote_fd
12715 scoped_remote_fd (remote_target
*remote
, int fd
)
12716 : m_remote (remote
), m_fd (fd
)
12720 ~scoped_remote_fd ()
12727 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12731 /* Swallow exception before it escapes the dtor. If
12732 something goes wrong, likely the connection is gone,
12733 and there's nothing else that can be done. */
12738 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12740 /* Release ownership of the file descriptor, and return it. */
12741 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12748 /* Return the owned file descriptor. */
12749 int get () const noexcept
12755 /* The remote target. */
12756 remote_target
*m_remote
;
12758 /* The owned remote I/O file descriptor. */
12763 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12765 remote_target
*remote
= get_current_remote_target ();
12767 if (remote
== nullptr)
12768 error (_("command can only be used with remote target"));
12770 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12774 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12777 int retcode
, remote_errno
, bytes
, io_size
;
12778 int bytes_in_buffer
;
12782 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12784 perror_with_name (local_file
);
12786 scoped_remote_fd fd
12787 (this, remote_hostio_open (NULL
,
12788 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12790 0700, 0, &remote_errno
));
12791 if (fd
.get () == -1)
12792 remote_hostio_error (remote_errno
);
12794 /* Send up to this many bytes at once. They won't all fit in the
12795 remote packet limit, so we'll transfer slightly fewer. */
12796 io_size
= get_remote_packet_size ();
12797 gdb::byte_vector
buffer (io_size
);
12799 bytes_in_buffer
= 0;
12802 while (bytes_in_buffer
|| !saw_eof
)
12806 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12807 io_size
- bytes_in_buffer
,
12811 if (ferror (file
.get ()))
12812 error (_("Error reading %s."), local_file
);
12815 /* EOF. Unless there is something still in the
12816 buffer from the last iteration, we are done. */
12818 if (bytes_in_buffer
== 0)
12826 bytes
+= bytes_in_buffer
;
12827 bytes_in_buffer
= 0;
12829 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12830 offset
, &remote_errno
);
12833 remote_hostio_error (remote_errno
);
12834 else if (retcode
== 0)
12835 error (_("Remote write of %d bytes returned 0!"), bytes
);
12836 else if (retcode
< bytes
)
12838 /* Short write. Save the rest of the read data for the next
12840 bytes_in_buffer
= bytes
- retcode
;
12841 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12847 if (remote_hostio_close (fd
.release (), &remote_errno
))
12848 remote_hostio_error (remote_errno
);
12851 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12855 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12857 remote_target
*remote
= get_current_remote_target ();
12859 if (remote
== nullptr)
12860 error (_("command can only be used with remote target"));
12862 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12866 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12869 int remote_errno
, bytes
, io_size
;
12872 scoped_remote_fd fd
12873 (this, remote_hostio_open (NULL
,
12874 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12876 if (fd
.get () == -1)
12877 remote_hostio_error (remote_errno
);
12879 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12881 perror_with_name (local_file
);
12883 /* Send up to this many bytes at once. They won't all fit in the
12884 remote packet limit, so we'll transfer slightly fewer. */
12885 io_size
= get_remote_packet_size ();
12886 gdb::byte_vector
buffer (io_size
);
12891 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12894 /* Success, but no bytes, means end-of-file. */
12897 remote_hostio_error (remote_errno
);
12901 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12903 perror_with_name (local_file
);
12906 if (remote_hostio_close (fd
.release (), &remote_errno
))
12907 remote_hostio_error (remote_errno
);
12910 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12914 remote_file_delete (const char *remote_file
, int from_tty
)
12916 remote_target
*remote
= get_current_remote_target ();
12918 if (remote
== nullptr)
12919 error (_("command can only be used with remote target"));
12921 remote
->remote_file_delete (remote_file
, from_tty
);
12925 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12927 int retcode
, remote_errno
;
12929 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12931 remote_hostio_error (remote_errno
);
12934 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12938 remote_put_command (const char *args
, int from_tty
)
12941 error_no_arg (_("file to put"));
12943 gdb_argv
argv (args
);
12944 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12945 error (_("Invalid parameters to remote put"));
12947 remote_file_put (argv
[0], argv
[1], from_tty
);
12951 remote_get_command (const char *args
, int from_tty
)
12954 error_no_arg (_("file to get"));
12956 gdb_argv
argv (args
);
12957 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12958 error (_("Invalid parameters to remote get"));
12960 remote_file_get (argv
[0], argv
[1], from_tty
);
12964 remote_delete_command (const char *args
, int from_tty
)
12967 error_no_arg (_("file to delete"));
12969 gdb_argv
argv (args
);
12970 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12971 error (_("Invalid parameters to remote delete"));
12973 remote_file_delete (argv
[0], from_tty
);
12977 remote_target::can_execute_reverse ()
12979 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12980 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12987 remote_target::supports_non_stop ()
12993 remote_target::supports_disable_randomization ()
12995 /* Only supported in extended mode. */
13000 remote_target::supports_multi_process ()
13002 struct remote_state
*rs
= get_remote_state ();
13004 return remote_multi_process_p (rs
);
13008 remote_supports_cond_tracepoints ()
13010 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
13014 remote_target::supports_evaluation_of_breakpoint_conditions ()
13016 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
13020 remote_supports_fast_tracepoints ()
13022 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
13026 remote_supports_static_tracepoints ()
13028 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
13032 remote_supports_install_in_trace ()
13034 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
13038 remote_target::supports_enable_disable_tracepoint ()
13040 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
13045 remote_target::supports_string_tracing ()
13047 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
13051 remote_target::can_run_breakpoint_commands ()
13053 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
13057 remote_target::trace_init ()
13059 struct remote_state
*rs
= get_remote_state ();
13062 remote_get_noisy_reply ();
13063 if (strcmp (rs
->buf
.data (), "OK") != 0)
13064 error (_("Target does not support this command."));
13067 /* Recursive routine to walk through command list including loops, and
13068 download packets for each command. */
13071 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
13072 struct command_line
*cmds
)
13074 struct remote_state
*rs
= get_remote_state ();
13075 struct command_line
*cmd
;
13077 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
13079 QUIT
; /* Allow user to bail out with ^C. */
13080 strcpy (rs
->buf
.data (), "QTDPsrc:");
13081 encode_source_string (num
, addr
, "cmd", cmd
->line
,
13082 rs
->buf
.data () + strlen (rs
->buf
.data ()),
13083 rs
->buf
.size () - strlen (rs
->buf
.data ()));
13085 remote_get_noisy_reply ();
13086 if (strcmp (rs
->buf
.data (), "OK"))
13087 warning (_("Target does not support source download."));
13089 if (cmd
->control_type
== while_control
13090 || cmd
->control_type
== while_stepping_control
)
13092 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
13094 QUIT
; /* Allow user to bail out with ^C. */
13095 strcpy (rs
->buf
.data (), "QTDPsrc:");
13096 encode_source_string (num
, addr
, "cmd", "end",
13097 rs
->buf
.data () + strlen (rs
->buf
.data ()),
13098 rs
->buf
.size () - strlen (rs
->buf
.data ()));
13100 remote_get_noisy_reply ();
13101 if (strcmp (rs
->buf
.data (), "OK"))
13102 warning (_("Target does not support source download."));
13108 remote_target::download_tracepoint (struct bp_location
*loc
)
13112 std::vector
<std::string
> tdp_actions
;
13113 std::vector
<std::string
> stepping_actions
;
13115 struct breakpoint
*b
= loc
->owner
;
13116 struct tracepoint
*t
= (struct tracepoint
*) b
;
13117 struct remote_state
*rs
= get_remote_state ();
13119 const char *err_msg
= _("Tracepoint packet too large for target.");
13122 /* We use a buffer other than rs->buf because we'll build strings
13123 across multiple statements, and other statements in between could
13125 gdb::char_vector
buf (get_remote_packet_size ());
13127 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
13129 tpaddr
= loc
->address
;
13130 strcpy (addrbuf
, phex (tpaddr
, sizeof (CORE_ADDR
)));
13131 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
13132 b
->number
, addrbuf
, /* address */
13133 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
13134 t
->step_count
, t
->pass_count
);
13136 if (ret
< 0 || ret
>= buf
.size ())
13137 error ("%s", err_msg
);
13139 /* Fast tracepoints are mostly handled by the target, but we can
13140 tell the target how big of an instruction block should be moved
13142 if (b
->type
== bp_fast_tracepoint
)
13144 /* Only test for support at download time; we may not know
13145 target capabilities at definition time. */
13146 if (remote_supports_fast_tracepoints ())
13148 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
13151 size_left
= buf
.size () - strlen (buf
.data ());
13152 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13154 gdb_insn_length (loc
->gdbarch
, tpaddr
));
13156 if (ret
< 0 || ret
>= size_left
)
13157 error ("%s", err_msg
);
13160 /* If it passed validation at definition but fails now,
13161 something is very wrong. */
13162 internal_error (__FILE__
, __LINE__
,
13163 _("Fast tracepoint not "
13164 "valid during download"));
13167 /* Fast tracepoints are functionally identical to regular
13168 tracepoints, so don't take lack of support as a reason to
13169 give up on the trace run. */
13170 warning (_("Target does not support fast tracepoints, "
13171 "downloading %d as regular tracepoint"), b
->number
);
13173 else if (b
->type
== bp_static_tracepoint
)
13175 /* Only test for support at download time; we may not know
13176 target capabilities at definition time. */
13177 if (remote_supports_static_tracepoints ())
13179 struct static_tracepoint_marker marker
;
13181 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
13183 size_left
= buf
.size () - strlen (buf
.data ());
13184 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13187 if (ret
< 0 || ret
>= size_left
)
13188 error ("%s", err_msg
);
13191 error (_("Static tracepoint not valid during download"));
13194 /* Fast tracepoints are functionally identical to regular
13195 tracepoints, so don't take lack of support as a reason
13196 to give up on the trace run. */
13197 error (_("Target does not support static tracepoints"));
13199 /* If the tracepoint has a conditional, make it into an agent
13200 expression and append to the definition. */
13203 /* Only test support at download time, we may not know target
13204 capabilities at definition time. */
13205 if (remote_supports_cond_tracepoints ())
13207 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
13210 size_left
= buf
.size () - strlen (buf
.data ());
13212 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13213 size_left
, ":X%x,", aexpr
->len
);
13215 if (ret
< 0 || ret
>= size_left
)
13216 error ("%s", err_msg
);
13218 size_left
= buf
.size () - strlen (buf
.data ());
13220 /* Two bytes to encode each aexpr byte, plus the terminating
13222 if (aexpr
->len
* 2 + 1 > size_left
)
13223 error ("%s", err_msg
);
13225 pkt
= buf
.data () + strlen (buf
.data ());
13227 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
13228 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
13232 warning (_("Target does not support conditional tracepoints, "
13233 "ignoring tp %d cond"), b
->number
);
13236 if (b
->commands
|| !default_collect
.empty ())
13238 size_left
= buf
.size () - strlen (buf
.data ());
13240 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13243 if (ret
< 0 || ret
>= size_left
)
13244 error ("%s", err_msg
);
13247 putpkt (buf
.data ());
13248 remote_get_noisy_reply ();
13249 if (strcmp (rs
->buf
.data (), "OK"))
13250 error (_("Target does not support tracepoints."));
13252 /* do_single_steps (t); */
13253 for (auto action_it
= tdp_actions
.begin ();
13254 action_it
!= tdp_actions
.end (); action_it
++)
13256 QUIT
; /* Allow user to bail out with ^C. */
13258 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
13259 || !stepping_actions
.empty ());
13261 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
13262 b
->number
, addrbuf
, /* address */
13263 action_it
->c_str (),
13264 has_more
? '-' : 0);
13266 if (ret
< 0 || ret
>= buf
.size ())
13267 error ("%s", err_msg
);
13269 putpkt (buf
.data ());
13270 remote_get_noisy_reply ();
13271 if (strcmp (rs
->buf
.data (), "OK"))
13272 error (_("Error on target while setting tracepoints."));
13275 for (auto action_it
= stepping_actions
.begin ();
13276 action_it
!= stepping_actions
.end (); action_it
++)
13278 QUIT
; /* Allow user to bail out with ^C. */
13280 bool is_first
= action_it
== stepping_actions
.begin ();
13281 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
13283 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
13284 b
->number
, addrbuf
, /* address */
13285 is_first
? "S" : "",
13286 action_it
->c_str (),
13287 has_more
? "-" : "");
13289 if (ret
< 0 || ret
>= buf
.size ())
13290 error ("%s", err_msg
);
13292 putpkt (buf
.data ());
13293 remote_get_noisy_reply ();
13294 if (strcmp (rs
->buf
.data (), "OK"))
13295 error (_("Error on target while setting tracepoints."));
13298 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
13300 if (b
->location
!= NULL
)
13302 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13304 if (ret
< 0 || ret
>= buf
.size ())
13305 error ("%s", err_msg
);
13307 encode_source_string (b
->number
, loc
->address
, "at",
13308 event_location_to_string (b
->location
.get ()),
13309 buf
.data () + strlen (buf
.data ()),
13310 buf
.size () - strlen (buf
.data ()));
13311 putpkt (buf
.data ());
13312 remote_get_noisy_reply ();
13313 if (strcmp (rs
->buf
.data (), "OK"))
13314 warning (_("Target does not support source download."));
13316 if (b
->cond_string
)
13318 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13320 if (ret
< 0 || ret
>= buf
.size ())
13321 error ("%s", err_msg
);
13323 encode_source_string (b
->number
, loc
->address
,
13324 "cond", b
->cond_string
.get (),
13325 buf
.data () + strlen (buf
.data ()),
13326 buf
.size () - strlen (buf
.data ()));
13327 putpkt (buf
.data ());
13328 remote_get_noisy_reply ();
13329 if (strcmp (rs
->buf
.data (), "OK"))
13330 warning (_("Target does not support source download."));
13332 remote_download_command_source (b
->number
, loc
->address
,
13333 breakpoint_commands (b
));
13338 remote_target::can_download_tracepoint ()
13340 struct remote_state
*rs
= get_remote_state ();
13341 struct trace_status
*ts
;
13344 /* Don't try to install tracepoints until we've relocated our
13345 symbols, and fetched and merged the target's tracepoint list with
13347 if (rs
->starting_up
)
13350 ts
= current_trace_status ();
13351 status
= get_trace_status (ts
);
13353 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13356 /* If we are in a tracing experiment, but remote stub doesn't support
13357 installing tracepoint in trace, we have to return. */
13358 if (!remote_supports_install_in_trace ())
13366 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13368 struct remote_state
*rs
= get_remote_state ();
13371 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13372 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13374 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13375 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13376 >= get_remote_packet_size ())
13377 error (_("Trace state variable name too long for tsv definition packet"));
13378 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13381 remote_get_noisy_reply ();
13382 if (rs
->buf
[0] == '\0')
13383 error (_("Target does not support this command."));
13384 if (strcmp (rs
->buf
.data (), "OK") != 0)
13385 error (_("Error on target while downloading trace state variable."));
13389 remote_target::enable_tracepoint (struct bp_location
*location
)
13391 struct remote_state
*rs
= get_remote_state ();
13393 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13394 location
->owner
->number
,
13395 phex (location
->address
, sizeof (CORE_ADDR
)));
13397 remote_get_noisy_reply ();
13398 if (rs
->buf
[0] == '\0')
13399 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13400 if (strcmp (rs
->buf
.data (), "OK") != 0)
13401 error (_("Error on target while enabling tracepoint."));
13405 remote_target::disable_tracepoint (struct bp_location
*location
)
13407 struct remote_state
*rs
= get_remote_state ();
13409 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13410 location
->owner
->number
,
13411 phex (location
->address
, sizeof (CORE_ADDR
)));
13413 remote_get_noisy_reply ();
13414 if (rs
->buf
[0] == '\0')
13415 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13416 if (strcmp (rs
->buf
.data (), "OK") != 0)
13417 error (_("Error on target while disabling tracepoint."));
13421 remote_target::trace_set_readonly_regions ()
13424 bfd_size_type size
;
13429 if (!current_program_space
->exec_bfd ())
13430 return; /* No information to give. */
13432 struct remote_state
*rs
= get_remote_state ();
13434 strcpy (rs
->buf
.data (), "QTro");
13435 offset
= strlen (rs
->buf
.data ());
13436 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
13438 char tmp1
[40], tmp2
[40];
13441 if ((s
->flags
& SEC_LOAD
) == 0 ||
13442 /* (s->flags & SEC_CODE) == 0 || */
13443 (s
->flags
& SEC_READONLY
) == 0)
13447 vma
= bfd_section_vma (s
);
13448 size
= bfd_section_size (s
);
13449 sprintf_vma (tmp1
, vma
);
13450 sprintf_vma (tmp2
, vma
+ size
);
13451 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13452 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13454 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13456 Too many sections for read-only sections definition packet."));
13459 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13461 offset
+= sec_length
;
13466 getpkt (&rs
->buf
, 0);
13471 remote_target::trace_start ()
13473 struct remote_state
*rs
= get_remote_state ();
13475 putpkt ("QTStart");
13476 remote_get_noisy_reply ();
13477 if (rs
->buf
[0] == '\0')
13478 error (_("Target does not support this command."));
13479 if (strcmp (rs
->buf
.data (), "OK") != 0)
13480 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13484 remote_target::get_trace_status (struct trace_status
*ts
)
13486 /* Initialize it just to avoid a GCC false warning. */
13488 enum packet_result result
;
13489 struct remote_state
*rs
= get_remote_state ();
13491 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13494 /* FIXME we need to get register block size some other way. */
13495 trace_regblock_size
13496 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13498 putpkt ("qTStatus");
13502 p
= remote_get_noisy_reply ();
13504 catch (const gdb_exception_error
&ex
)
13506 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13508 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13514 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13516 /* If the remote target doesn't do tracing, flag it. */
13517 if (result
== PACKET_UNKNOWN
)
13520 /* We're working with a live target. */
13521 ts
->filename
= NULL
;
13524 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13526 /* Function 'parse_trace_status' sets default value of each field of
13527 'ts' at first, so we don't have to do it here. */
13528 parse_trace_status (p
, ts
);
13530 return ts
->running
;
13534 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13535 struct uploaded_tp
*utp
)
13537 struct remote_state
*rs
= get_remote_state ();
13539 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13540 size_t size
= get_remote_packet_size ();
13545 tp
->traceframe_usage
= 0;
13546 for (bp_location
*loc
: tp
->locations ())
13548 /* If the tracepoint was never downloaded, don't go asking for
13550 if (tp
->number_on_target
== 0)
13552 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13553 phex_nz (loc
->address
, 0));
13555 reply
= remote_get_noisy_reply ();
13556 if (reply
&& *reply
)
13559 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13565 utp
->hit_count
= 0;
13566 utp
->traceframe_usage
= 0;
13567 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13568 phex_nz (utp
->addr
, 0));
13570 reply
= remote_get_noisy_reply ();
13571 if (reply
&& *reply
)
13574 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13580 remote_target::trace_stop ()
13582 struct remote_state
*rs
= get_remote_state ();
13585 remote_get_noisy_reply ();
13586 if (rs
->buf
[0] == '\0')
13587 error (_("Target does not support this command."));
13588 if (strcmp (rs
->buf
.data (), "OK") != 0)
13589 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13593 remote_target::trace_find (enum trace_find_type type
, int num
,
13594 CORE_ADDR addr1
, CORE_ADDR addr2
,
13597 struct remote_state
*rs
= get_remote_state ();
13598 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13600 int target_frameno
= -1, target_tracept
= -1;
13602 /* Lookups other than by absolute frame number depend on the current
13603 trace selected, so make sure it is correct on the remote end
13605 if (type
!= tfind_number
)
13606 set_remote_traceframe ();
13608 p
= rs
->buf
.data ();
13609 strcpy (p
, "QTFrame:");
13610 p
= strchr (p
, '\0');
13614 xsnprintf (p
, endbuf
- p
, "%x", num
);
13617 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13620 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13623 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13624 phex_nz (addr2
, 0));
13626 case tfind_outside
:
13627 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13628 phex_nz (addr2
, 0));
13631 error (_("Unknown trace find type %d"), type
);
13635 reply
= remote_get_noisy_reply ();
13636 if (*reply
== '\0')
13637 error (_("Target does not support this command."));
13639 while (reply
&& *reply
)
13644 target_frameno
= (int) strtol (p
, &reply
, 16);
13646 error (_("Unable to parse trace frame number"));
13647 /* Don't update our remote traceframe number cache on failure
13648 to select a remote traceframe. */
13649 if (target_frameno
== -1)
13654 target_tracept
= (int) strtol (p
, &reply
, 16);
13656 error (_("Unable to parse tracepoint number"));
13658 case 'O': /* "OK"? */
13659 if (reply
[1] == 'K' && reply
[2] == '\0')
13662 error (_("Bogus reply from target: %s"), reply
);
13665 error (_("Bogus reply from target: %s"), reply
);
13668 *tpp
= target_tracept
;
13670 rs
->remote_traceframe_number
= target_frameno
;
13671 return target_frameno
;
13675 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13677 struct remote_state
*rs
= get_remote_state ();
13681 set_remote_traceframe ();
13683 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13685 reply
= remote_get_noisy_reply ();
13686 if (reply
&& *reply
)
13690 unpack_varlen_hex (reply
+ 1, &uval
);
13691 *val
= (LONGEST
) uval
;
13699 remote_target::save_trace_data (const char *filename
)
13701 struct remote_state
*rs
= get_remote_state ();
13704 p
= rs
->buf
.data ();
13705 strcpy (p
, "QTSave:");
13707 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13708 >= get_remote_packet_size ())
13709 error (_("Remote file name too long for trace save packet"));
13710 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13713 reply
= remote_get_noisy_reply ();
13714 if (*reply
== '\0')
13715 error (_("Target does not support this command."));
13716 if (strcmp (reply
, "OK") != 0)
13717 error (_("Bogus reply from target: %s"), reply
);
13721 /* This is basically a memory transfer, but needs to be its own packet
13722 because we don't know how the target actually organizes its trace
13723 memory, plus we want to be able to ask for as much as possible, but
13724 not be unhappy if we don't get as much as we ask for. */
13727 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13729 struct remote_state
*rs
= get_remote_state ();
13734 p
= rs
->buf
.data ();
13735 strcpy (p
, "qTBuffer:");
13737 p
+= hexnumstr (p
, offset
);
13739 p
+= hexnumstr (p
, len
);
13743 reply
= remote_get_noisy_reply ();
13744 if (reply
&& *reply
)
13746 /* 'l' by itself means we're at the end of the buffer and
13747 there is nothing more to get. */
13751 /* Convert the reply into binary. Limit the number of bytes to
13752 convert according to our passed-in buffer size, rather than
13753 what was returned in the packet; if the target is
13754 unexpectedly generous and gives us a bigger reply than we
13755 asked for, we don't want to crash. */
13756 rslt
= hex2bin (reply
, buf
, len
);
13760 /* Something went wrong, flag as an error. */
13765 remote_target::set_disconnected_tracing (int val
)
13767 struct remote_state
*rs
= get_remote_state ();
13769 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13773 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13774 "QTDisconnected:%x", val
);
13776 reply
= remote_get_noisy_reply ();
13777 if (*reply
== '\0')
13778 error (_("Target does not support this command."));
13779 if (strcmp (reply
, "OK") != 0)
13780 error (_("Bogus reply from target: %s"), reply
);
13783 warning (_("Target does not support disconnected tracing."));
13787 remote_target::core_of_thread (ptid_t ptid
)
13789 thread_info
*info
= find_thread_ptid (this, ptid
);
13791 if (info
!= NULL
&& info
->priv
!= NULL
)
13792 return get_remote_thread_info (info
)->core
;
13798 remote_target::set_circular_trace_buffer (int val
)
13800 struct remote_state
*rs
= get_remote_state ();
13803 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13804 "QTBuffer:circular:%x", val
);
13806 reply
= remote_get_noisy_reply ();
13807 if (*reply
== '\0')
13808 error (_("Target does not support this command."));
13809 if (strcmp (reply
, "OK") != 0)
13810 error (_("Bogus reply from target: %s"), reply
);
13814 remote_target::traceframe_info ()
13816 gdb::optional
<gdb::char_vector
> text
13817 = target_read_stralloc (current_inferior ()->top_target (),
13818 TARGET_OBJECT_TRACEFRAME_INFO
,
13821 return parse_traceframe_info (text
->data ());
13826 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13827 instruction on which a fast tracepoint may be placed. Returns -1
13828 if the packet is not supported, and 0 if the minimum instruction
13829 length is unknown. */
13832 remote_target::get_min_fast_tracepoint_insn_len ()
13834 struct remote_state
*rs
= get_remote_state ();
13837 /* If we're not debugging a process yet, the IPA can't be
13839 if (!target_has_execution ())
13842 /* Make sure the remote is pointing at the right process. */
13843 set_general_process ();
13845 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13847 reply
= remote_get_noisy_reply ();
13848 if (*reply
== '\0')
13852 ULONGEST min_insn_len
;
13854 unpack_varlen_hex (reply
, &min_insn_len
);
13856 return (int) min_insn_len
;
13861 remote_target::set_trace_buffer_size (LONGEST val
)
13863 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13865 struct remote_state
*rs
= get_remote_state ();
13866 char *buf
= rs
->buf
.data ();
13867 char *endbuf
= buf
+ get_remote_packet_size ();
13868 enum packet_result result
;
13870 gdb_assert (val
>= 0 || val
== -1);
13871 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13872 /* Send -1 as literal "-1" to avoid host size dependency. */
13876 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13879 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13882 remote_get_noisy_reply ();
13883 result
= packet_ok (rs
->buf
,
13884 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13886 if (result
!= PACKET_OK
)
13887 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13892 remote_target::set_trace_notes (const char *user
, const char *notes
,
13893 const char *stop_notes
)
13895 struct remote_state
*rs
= get_remote_state ();
13897 char *buf
= rs
->buf
.data ();
13898 char *endbuf
= buf
+ get_remote_packet_size ();
13901 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13904 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13905 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13911 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13912 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13918 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13919 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13923 /* Ensure the buffer is terminated. */
13927 reply
= remote_get_noisy_reply ();
13928 if (*reply
== '\0')
13931 if (strcmp (reply
, "OK") != 0)
13932 error (_("Bogus reply from target: %s"), reply
);
13938 remote_target::use_agent (bool use
)
13940 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13942 struct remote_state
*rs
= get_remote_state ();
13944 /* If the stub supports QAgent. */
13945 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13947 getpkt (&rs
->buf
, 0);
13949 if (strcmp (rs
->buf
.data (), "OK") == 0)
13960 remote_target::can_use_agent ()
13962 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13965 struct btrace_target_info
13967 /* The ptid of the traced thread. */
13970 /* The obtained branch trace configuration. */
13971 struct btrace_config conf
;
13974 /* Reset our idea of our target's btrace configuration. */
13977 remote_btrace_reset (remote_state
*rs
)
13979 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13982 /* Synchronize the configuration with the target. */
13985 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13987 struct packet_config
*packet
;
13988 struct remote_state
*rs
;
13989 char *buf
, *pos
, *endbuf
;
13991 rs
= get_remote_state ();
13992 buf
= rs
->buf
.data ();
13993 endbuf
= buf
+ get_remote_packet_size ();
13995 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13996 if (packet_config_support (packet
) == PACKET_ENABLE
13997 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
14000 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
14004 getpkt (&rs
->buf
, 0);
14006 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
14008 if (buf
[0] == 'E' && buf
[1] == '.')
14009 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
14011 error (_("Failed to configure the BTS buffer size."));
14014 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
14017 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
14018 if (packet_config_support (packet
) == PACKET_ENABLE
14019 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
14022 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
14026 getpkt (&rs
->buf
, 0);
14028 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
14030 if (buf
[0] == 'E' && buf
[1] == '.')
14031 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
14033 error (_("Failed to configure the trace buffer size."));
14036 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
14040 /* Read the current thread's btrace configuration from the target and
14041 store it into CONF. */
14044 btrace_read_config (struct btrace_config
*conf
)
14046 gdb::optional
<gdb::char_vector
> xml
14047 = target_read_stralloc (current_inferior ()->top_target (),
14048 TARGET_OBJECT_BTRACE_CONF
, "");
14050 parse_xml_btrace_conf (conf
, xml
->data ());
14053 /* Maybe reopen target btrace. */
14056 remote_target::remote_btrace_maybe_reopen ()
14058 struct remote_state
*rs
= get_remote_state ();
14059 int btrace_target_pushed
= 0;
14060 #if !defined (HAVE_LIBIPT)
14064 /* Don't bother walking the entirety of the remote thread list when
14065 we know the feature isn't supported by the remote. */
14066 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
14069 scoped_restore_current_thread restore_thread
;
14071 for (thread_info
*tp
: all_non_exited_threads (this))
14073 set_general_thread (tp
->ptid
);
14075 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
14076 btrace_read_config (&rs
->btrace_config
);
14078 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
14081 #if !defined (HAVE_LIBIPT)
14082 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
14087 warning (_("Target is recording using Intel Processor Trace "
14088 "but support was disabled at compile time."));
14093 #endif /* !defined (HAVE_LIBIPT) */
14095 /* Push target, once, but before anything else happens. This way our
14096 changes to the threads will be cleaned up by unpushing the target
14097 in case btrace_read_config () throws. */
14098 if (!btrace_target_pushed
)
14100 btrace_target_pushed
= 1;
14101 record_btrace_push_target ();
14102 printf_filtered (_("Target is recording using %s.\n"),
14103 btrace_format_string (rs
->btrace_config
.format
));
14106 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
14107 tp
->btrace
.target
->ptid
= tp
->ptid
;
14108 tp
->btrace
.target
->conf
= rs
->btrace_config
;
14112 /* Enable branch tracing. */
14114 struct btrace_target_info
*
14115 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
14117 struct btrace_target_info
*tinfo
= NULL
;
14118 struct packet_config
*packet
= NULL
;
14119 struct remote_state
*rs
= get_remote_state ();
14120 char *buf
= rs
->buf
.data ();
14121 char *endbuf
= buf
+ get_remote_packet_size ();
14123 switch (conf
->format
)
14125 case BTRACE_FORMAT_BTS
:
14126 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
14129 case BTRACE_FORMAT_PT
:
14130 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
14134 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
14135 error (_("Target does not support branch tracing."));
14137 btrace_sync_conf (conf
);
14139 set_general_thread (ptid
);
14141 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14143 getpkt (&rs
->buf
, 0);
14145 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14147 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14148 error (_("Could not enable branch tracing for %s: %s"),
14149 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
14151 error (_("Could not enable branch tracing for %s."),
14152 target_pid_to_str (ptid
).c_str ());
14155 tinfo
= XCNEW (struct btrace_target_info
);
14156 tinfo
->ptid
= ptid
;
14158 /* If we fail to read the configuration, we lose some information, but the
14159 tracing itself is not impacted. */
14162 btrace_read_config (&tinfo
->conf
);
14164 catch (const gdb_exception_error
&err
)
14166 if (err
.message
!= NULL
)
14167 warning ("%s", err
.what ());
14173 /* Disable branch tracing. */
14176 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
14178 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
14179 struct remote_state
*rs
= get_remote_state ();
14180 char *buf
= rs
->buf
.data ();
14181 char *endbuf
= buf
+ get_remote_packet_size ();
14183 if (packet_config_support (packet
) != PACKET_ENABLE
)
14184 error (_("Target does not support branch tracing."));
14186 set_general_thread (tinfo
->ptid
);
14188 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14190 getpkt (&rs
->buf
, 0);
14192 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14194 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14195 error (_("Could not disable branch tracing for %s: %s"),
14196 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
14198 error (_("Could not disable branch tracing for %s."),
14199 target_pid_to_str (tinfo
->ptid
).c_str ());
14205 /* Teardown branch tracing. */
14208 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
14210 /* We must not talk to the target during teardown. */
14214 /* Read the branch trace. */
14217 remote_target::read_btrace (struct btrace_data
*btrace
,
14218 struct btrace_target_info
*tinfo
,
14219 enum btrace_read_type type
)
14221 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
14224 if (packet_config_support (packet
) != PACKET_ENABLE
)
14225 error (_("Target does not support branch tracing."));
14227 #if !defined(HAVE_LIBEXPAT)
14228 error (_("Cannot process branch tracing result. XML parsing not supported."));
14233 case BTRACE_READ_ALL
:
14236 case BTRACE_READ_NEW
:
14239 case BTRACE_READ_DELTA
:
14243 internal_error (__FILE__
, __LINE__
,
14244 _("Bad branch tracing read type: %u."),
14245 (unsigned int) type
);
14248 gdb::optional
<gdb::char_vector
> xml
14249 = target_read_stralloc (current_inferior ()->top_target (),
14250 TARGET_OBJECT_BTRACE
, annex
);
14252 return BTRACE_ERR_UNKNOWN
;
14254 parse_xml_btrace (btrace
, xml
->data ());
14256 return BTRACE_ERR_NONE
;
14259 const struct btrace_config
*
14260 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
14262 return &tinfo
->conf
;
14266 remote_target::augmented_libraries_svr4_read ()
14268 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
14272 /* Implementation of to_load. */
14275 remote_target::load (const char *name
, int from_tty
)
14277 generic_load (name
, from_tty
);
14280 /* Accepts an integer PID; returns a string representing a file that
14281 can be opened on the remote side to get the symbols for the child
14282 process. Returns NULL if the operation is not supported. */
14285 remote_target::pid_to_exec_file (int pid
)
14287 static gdb::optional
<gdb::char_vector
> filename
;
14288 char *annex
= NULL
;
14290 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
14293 inferior
*inf
= find_inferior_pid (this, pid
);
14295 internal_error (__FILE__
, __LINE__
,
14296 _("not currently attached to process %d"), pid
);
14298 if (!inf
->fake_pid_p
)
14300 const int annex_size
= 9;
14302 annex
= (char *) alloca (annex_size
);
14303 xsnprintf (annex
, annex_size
, "%x", pid
);
14306 filename
= target_read_stralloc (current_inferior ()->top_target (),
14307 TARGET_OBJECT_EXEC_FILE
, annex
);
14309 return filename
? filename
->data () : nullptr;
14312 /* Implement the to_can_do_single_step target_ops method. */
14315 remote_target::can_do_single_step ()
14317 /* We can only tell whether target supports single step or not by
14318 supported s and S vCont actions if the stub supports vContSupported
14319 feature. If the stub doesn't support vContSupported feature,
14320 we have conservatively to think target doesn't supports single
14322 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
14324 struct remote_state
*rs
= get_remote_state ();
14326 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14327 remote_vcont_probe ();
14329 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14335 /* Implementation of the to_execution_direction method for the remote
14338 enum exec_direction_kind
14339 remote_target::execution_direction ()
14341 struct remote_state
*rs
= get_remote_state ();
14343 return rs
->last_resume_exec_dir
;
14346 /* Return pointer to the thread_info struct which corresponds to
14347 THREAD_HANDLE (having length HANDLE_LEN). */
14350 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14354 for (thread_info
*tp
: all_non_exited_threads (this))
14356 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14358 if (tp
->inf
== inf
&& priv
!= NULL
)
14360 if (handle_len
!= priv
->thread_handle
.size ())
14361 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14362 handle_len
, priv
->thread_handle
.size ());
14363 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14373 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14375 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14376 return priv
->thread_handle
;
14380 remote_target::can_async_p ()
14382 struct remote_state
*rs
= get_remote_state ();
14384 /* We don't go async if the user has explicitly prevented it with the
14385 "maint set target-async" command. */
14386 if (!target_async_permitted
)
14389 /* We're async whenever the serial device is. */
14390 return serial_can_async_p (rs
->remote_desc
);
14394 remote_target::is_async_p ()
14396 struct remote_state
*rs
= get_remote_state ();
14398 if (!target_async_permitted
)
14399 /* We only enable async when the user specifically asks for it. */
14402 /* We're async whenever the serial device is. */
14403 return serial_is_async_p (rs
->remote_desc
);
14406 /* Pass the SERIAL event on and up to the client. One day this code
14407 will be able to delay notifying the client of an event until the
14408 point where an entire packet has been received. */
14410 static serial_event_ftype remote_async_serial_handler
;
14413 remote_async_serial_handler (struct serial
*scb
, void *context
)
14415 /* Don't propogate error information up to the client. Instead let
14416 the client find out about the error by querying the target. */
14417 inferior_event_handler (INF_REG_EVENT
);
14421 remote_async_inferior_event_handler (gdb_client_data data
)
14423 inferior_event_handler (INF_REG_EVENT
);
14427 remote_target::async_wait_fd ()
14429 struct remote_state
*rs
= get_remote_state ();
14430 return rs
->remote_desc
->fd
;
14434 remote_target::async (int enable
)
14436 struct remote_state
*rs
= get_remote_state ();
14440 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14442 /* If there are pending events in the stop reply queue tell the
14443 event loop to process them. */
14444 if (!rs
->stop_reply_queue
.empty ())
14445 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14446 /* For simplicity, below we clear the pending events token
14447 without remembering whether it is marked, so here we always
14448 mark it. If there's actually no pending notification to
14449 process, this ends up being a no-op (other than a spurious
14450 event-loop wakeup). */
14451 if (target_is_non_stop_p ())
14452 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14456 serial_async (rs
->remote_desc
, NULL
, NULL
);
14457 /* If the core is disabling async, it doesn't want to be
14458 disturbed with target events. Clear all async event sources
14460 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14461 if (target_is_non_stop_p ())
14462 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14466 /* Implementation of the to_thread_events method. */
14469 remote_target::thread_events (int enable
)
14471 struct remote_state
*rs
= get_remote_state ();
14472 size_t size
= get_remote_packet_size ();
14474 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14477 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14479 getpkt (&rs
->buf
, 0);
14481 switch (packet_ok (rs
->buf
,
14482 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14485 if (strcmp (rs
->buf
.data (), "OK") != 0)
14486 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14489 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14491 case PACKET_UNKNOWN
:
14497 show_remote_cmd (const char *args
, int from_tty
)
14499 /* We can't just use cmd_show_list here, because we want to skip
14500 the redundant "show remote Z-packet" and the legacy aliases. */
14501 struct cmd_list_element
*list
= remote_show_cmdlist
;
14502 struct ui_out
*uiout
= current_uiout
;
14504 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14505 for (; list
!= NULL
; list
= list
->next
)
14506 if (strcmp (list
->name
, "Z-packet") == 0)
14508 else if (list
->type
== not_set_cmd
)
14509 /* Alias commands are exactly like the original, except they
14510 don't have the normal type. */
14514 ui_out_emit_tuple
option_emitter (uiout
, "option");
14516 uiout
->field_string ("name", list
->name
);
14517 uiout
->text (": ");
14518 if (list
->type
== show_cmd
)
14519 do_show_command (NULL
, from_tty
, list
);
14521 cmd_func (list
, NULL
, from_tty
);
14526 /* Function to be called whenever a new objfile (shlib) is detected. */
14528 remote_new_objfile (struct objfile
*objfile
)
14530 remote_target
*remote
= get_current_remote_target ();
14532 /* First, check whether the current inferior's process target is a remote
14534 if (remote
== nullptr)
14537 /* When we are attaching or handling a fork child and the shared library
14538 subsystem reads the list of loaded libraries, we receive new objfile
14539 events in between each found library. The libraries are read in an
14540 undefined order, so if we gave the remote side a chance to look up
14541 symbols between each objfile, we might give it an inconsistent picture
14542 of the inferior. It could appear that a library A appears loaded but
14543 a library B does not, even though library A requires library B. That
14544 would present a state that couldn't normally exist in the inferior.
14546 So, skip these events, we'll give the remote a chance to look up symbols
14547 once all the loaded libraries and their symbols are known to GDB. */
14548 if (current_inferior ()->in_initial_library_scan
)
14551 remote
->remote_check_symbols ();
14554 /* Pull all the tracepoints defined on the target and create local
14555 data structures representing them. We don't want to create real
14556 tracepoints yet, we don't want to mess up the user's existing
14560 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14562 struct remote_state
*rs
= get_remote_state ();
14565 /* Ask for a first packet of tracepoint definition. */
14567 getpkt (&rs
->buf
, 0);
14568 p
= rs
->buf
.data ();
14569 while (*p
&& *p
!= 'l')
14571 parse_tracepoint_definition (p
, utpp
);
14572 /* Ask for another packet of tracepoint definition. */
14574 getpkt (&rs
->buf
, 0);
14575 p
= rs
->buf
.data ();
14581 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14583 struct remote_state
*rs
= get_remote_state ();
14586 /* Ask for a first packet of variable definition. */
14588 getpkt (&rs
->buf
, 0);
14589 p
= rs
->buf
.data ();
14590 while (*p
&& *p
!= 'l')
14592 parse_tsv_definition (p
, utsvp
);
14593 /* Ask for another packet of variable definition. */
14595 getpkt (&rs
->buf
, 0);
14596 p
= rs
->buf
.data ();
14601 /* The "set/show range-stepping" show hook. */
14604 show_range_stepping (struct ui_file
*file
, int from_tty
,
14605 struct cmd_list_element
*c
,
14608 fprintf_filtered (file
,
14609 _("Debugger's willingness to use range stepping "
14610 "is %s.\n"), value
);
14613 /* Return true if the vCont;r action is supported by the remote
14617 remote_target::vcont_r_supported ()
14619 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14620 remote_vcont_probe ();
14622 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14623 && get_remote_state ()->supports_vCont
.r
);
14626 /* The "set/show range-stepping" set hook. */
14629 set_range_stepping (const char *ignore_args
, int from_tty
,
14630 struct cmd_list_element
*c
)
14632 /* When enabling, check whether range stepping is actually supported
14633 by the target, and warn if not. */
14634 if (use_range_stepping
)
14636 remote_target
*remote
= get_current_remote_target ();
14638 || !remote
->vcont_r_supported ())
14639 warning (_("Range stepping is not supported by the current target"));
14644 show_remote_debug (struct ui_file
*file
, int from_tty
,
14645 struct cmd_list_element
*c
, const char *value
)
14647 fprintf_filtered (file
, _("Debugging of remote protocol is %s.\n"),
14652 show_remote_timeout (struct ui_file
*file
, int from_tty
,
14653 struct cmd_list_element
*c
, const char *value
)
14655 fprintf_filtered (file
,
14656 _("Timeout limit to wait for target to respond is %s.\n"),
14660 /* Implement the "supports_memory_tagging" target_ops method. */
14663 remote_target::supports_memory_tagging ()
14665 return remote_memory_tagging_p ();
14668 /* Create the qMemTags packet given ADDRESS, LEN and TYPE. */
14671 create_fetch_memtags_request (gdb::char_vector
&packet
, CORE_ADDR address
,
14672 size_t len
, int type
)
14674 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
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
)));
14681 strcpy (packet
.data (), request
.c_str ());
14684 /* Parse the qMemTags packet reply into TAGS.
14686 Return true if successful, false otherwise. */
14689 parse_fetch_memtags_reply (const gdb::char_vector
&reply
,
14690 gdb::byte_vector
&tags
)
14692 if (reply
.empty () || reply
[0] == 'E' || reply
[0] != 'm')
14695 /* Copy the tag data. */
14696 tags
= hex2bin (reply
.data () + 1);
14701 /* Create the QMemTags packet given ADDRESS, LEN, TYPE and TAGS. */
14704 create_store_memtags_request (gdb::char_vector
&packet
, CORE_ADDR address
,
14705 size_t len
, int type
,
14706 const gdb::byte_vector
&tags
)
14708 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
14710 /* Put together the main packet, address and length. */
14711 std::string request
= string_printf ("QMemTags:%s,%s:%s:",
14712 phex_nz (address
, addr_size
),
14713 phex_nz (len
, sizeof (len
)),
14714 phex_nz (type
, sizeof (type
)));
14715 request
+= bin2hex (tags
.data (), tags
.size ());
14717 /* Check if we have exceeded the maximum packet size. */
14718 if (packet
.size () < request
.length ())
14719 error (_("Contents too big for packet QMemTags."));
14721 strcpy (packet
.data (), request
.c_str ());
14724 /* Implement the "fetch_memtags" target_ops method. */
14727 remote_target::fetch_memtags (CORE_ADDR address
, size_t len
,
14728 gdb::byte_vector
&tags
, int type
)
14730 /* Make sure the qMemTags packet is supported. */
14731 if (!remote_memory_tagging_p ())
14732 gdb_assert_not_reached ("remote fetch_memtags called with packet disabled");
14734 struct remote_state
*rs
= get_remote_state ();
14736 create_fetch_memtags_request (rs
->buf
, address
, len
, type
);
14739 getpkt (&rs
->buf
, 0);
14741 return parse_fetch_memtags_reply (rs
->buf
, tags
);
14744 /* Implement the "store_memtags" target_ops method. */
14747 remote_target::store_memtags (CORE_ADDR address
, size_t len
,
14748 const gdb::byte_vector
&tags
, int type
)
14750 /* Make sure the QMemTags packet is supported. */
14751 if (!remote_memory_tagging_p ())
14752 gdb_assert_not_reached ("remote store_memtags called with packet disabled");
14754 struct remote_state
*rs
= get_remote_state ();
14756 create_store_memtags_request (rs
->buf
, address
, len
, type
, tags
);
14759 getpkt (&rs
->buf
, 0);
14761 /* Verify if the request was successful. */
14762 return packet_check_result (rs
->buf
.data ()) == PACKET_OK
;
14765 /* Return true if remote target T is non-stop. */
14768 remote_target_is_non_stop_p (remote_target
*t
)
14770 scoped_restore_current_thread restore_thread
;
14771 switch_to_target_no_thread (t
);
14773 return target_is_non_stop_p ();
14778 namespace selftests
{
14781 test_memory_tagging_functions ()
14783 remote_target remote
;
14785 struct packet_config
*config
14786 = &remote_protocol_packets
[PACKET_memory_tagging_feature
];
14788 scoped_restore restore_memtag_support_
14789 = make_scoped_restore (&config
->support
);
14791 /* Test memory tagging packet support. */
14792 config
->support
= PACKET_SUPPORT_UNKNOWN
;
14793 SELF_CHECK (remote
.supports_memory_tagging () == false);
14794 config
->support
= PACKET_DISABLE
;
14795 SELF_CHECK (remote
.supports_memory_tagging () == false);
14796 config
->support
= PACKET_ENABLE
;
14797 SELF_CHECK (remote
.supports_memory_tagging () == true);
14799 /* Setup testing. */
14800 gdb::char_vector packet
;
14801 gdb::byte_vector tags
, bv
;
14802 std::string expected
, reply
;
14803 packet
.resize (32000);
14805 /* Test creating a qMemTags request. */
14807 expected
= "qMemTags:0,0:0";
14808 create_fetch_memtags_request (packet
, 0x0, 0x0, 0);
14809 SELF_CHECK (strcmp (packet
.data (), expected
.c_str ()) == 0);
14811 expected
= "qMemTags:deadbeef,10:1";
14812 create_fetch_memtags_request (packet
, 0xdeadbeef, 16, 1);
14813 SELF_CHECK (strcmp (packet
.data (), expected
.c_str ()) == 0);
14815 /* Test parsing a qMemTags reply. */
14817 /* Error reply, tags vector unmodified. */
14819 strcpy (packet
.data (), reply
.c_str ());
14821 SELF_CHECK (parse_fetch_memtags_reply (packet
, tags
) == false);
14822 SELF_CHECK (tags
.size () == 0);
14824 /* Valid reply, tags vector updated. */
14828 for (int i
= 0; i
< 5; i
++)
14831 reply
= "m" + bin2hex (bv
.data (), bv
.size ());
14832 strcpy (packet
.data (), reply
.c_str ());
14834 SELF_CHECK (parse_fetch_memtags_reply (packet
, tags
) == true);
14835 SELF_CHECK (tags
.size () == 5);
14837 for (int i
= 0; i
< 5; i
++)
14838 SELF_CHECK (tags
[i
] == i
);
14840 /* Test creating a QMemTags request. */
14842 /* Empty tag data. */
14844 expected
= "QMemTags:0,0:0:";
14845 create_store_memtags_request (packet
, 0x0, 0x0, 0, tags
);
14846 SELF_CHECK (memcmp (packet
.data (), expected
.c_str (),
14847 expected
.length ()) == 0);
14849 /* Non-empty tag data. */
14851 for (int i
= 0; i
< 5; i
++)
14852 tags
.push_back (i
);
14853 expected
= "QMemTags:deadbeef,ff:1:0001020304";
14854 create_store_memtags_request (packet
, 0xdeadbeef, 255, 1, tags
);
14855 SELF_CHECK (memcmp (packet
.data (), expected
.c_str (),
14856 expected
.length ()) == 0);
14859 } // namespace selftests
14860 #endif /* GDB_SELF_TEST */
14862 void _initialize_remote ();
14864 _initialize_remote ()
14866 /* architecture specific data */
14867 remote_g_packet_data_handle
=
14868 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14870 add_target (remote_target_info
, remote_target::open
);
14871 add_target (extended_remote_target_info
, extended_remote_target::open
);
14873 /* Hook into new objfile notification. */
14874 gdb::observers::new_objfile
.attach (remote_new_objfile
, "remote");
14877 init_remote_threadtests ();
14880 /* set/show remote ... */
14882 add_basic_prefix_cmd ("remote", class_maintenance
, _("\
14883 Remote protocol specific variables.\n\
14884 Configure various remote-protocol specific variables such as\n\
14885 the packets being used."),
14886 &remote_set_cmdlist
,
14887 0 /* allow-unknown */, &setlist
);
14888 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14889 Remote protocol specific variables.\n\
14890 Configure various remote-protocol specific variables such as\n\
14891 the packets being used."),
14892 &remote_show_cmdlist
,
14893 0 /* allow-unknown */, &showlist
);
14895 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14896 Compare section data on target to the exec file.\n\
14897 Argument is a single section name (default: all loaded sections).\n\
14898 To compare only read-only loaded sections, specify the -r option."),
14901 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14902 Send an arbitrary packet to a remote target.\n\
14903 maintenance packet TEXT\n\
14904 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14905 this command sends the string TEXT to the inferior, and displays the\n\
14906 response packet. GDB supplies the initial `$' character, and the\n\
14907 terminating `#' character and checksum."),
14910 set_show_commands remotebreak_cmds
14911 = add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14912 Set whether to send break if interrupted."), _("\
14913 Show whether to send break if interrupted."), _("\
14914 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14915 set_remotebreak
, show_remotebreak
,
14916 &setlist
, &showlist
);
14917 deprecate_cmd (remotebreak_cmds
.set
, "set remote interrupt-sequence");
14918 deprecate_cmd (remotebreak_cmds
.show
, "show remote interrupt-sequence");
14920 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14921 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14923 Set interrupt sequence to remote target."), _("\
14924 Show interrupt sequence to remote target."), _("\
14925 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14926 NULL
, show_interrupt_sequence
,
14927 &remote_set_cmdlist
,
14928 &remote_show_cmdlist
);
14930 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14931 &interrupt_on_connect
, _("\
14932 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14933 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14934 If set, interrupt sequence is sent to remote target."),
14936 &remote_set_cmdlist
, &remote_show_cmdlist
);
14938 /* Install commands for configuring memory read/write packets. */
14940 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14941 Set the maximum number of bytes per memory write packet (deprecated)."),
14943 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14944 Show the maximum number of bytes per memory write packet (deprecated)."),
14946 add_cmd ("memory-write-packet-size", no_class
,
14947 set_memory_write_packet_size
, _("\
14948 Set the maximum number of bytes per memory-write packet.\n\
14949 Specify the number of bytes in a packet or 0 (zero) for the\n\
14950 default packet size. The actual limit is further reduced\n\
14951 dependent on the target. Specify ``fixed'' to disable the\n\
14952 further restriction and ``limit'' to enable that restriction."),
14953 &remote_set_cmdlist
);
14954 add_cmd ("memory-read-packet-size", no_class
,
14955 set_memory_read_packet_size
, _("\
14956 Set the maximum number of bytes per memory-read packet.\n\
14957 Specify the number of bytes in a packet or 0 (zero) for the\n\
14958 default packet size. The actual limit is further reduced\n\
14959 dependent on the target. Specify ``fixed'' to disable the\n\
14960 further restriction and ``limit'' to enable that restriction."),
14961 &remote_set_cmdlist
);
14962 add_cmd ("memory-write-packet-size", no_class
,
14963 show_memory_write_packet_size
,
14964 _("Show the maximum number of bytes per memory-write packet."),
14965 &remote_show_cmdlist
);
14966 add_cmd ("memory-read-packet-size", no_class
,
14967 show_memory_read_packet_size
,
14968 _("Show the maximum number of bytes per memory-read packet."),
14969 &remote_show_cmdlist
);
14971 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14972 &remote_hw_watchpoint_limit
, _("\
14973 Set the maximum number of target hardware watchpoints."), _("\
14974 Show the maximum number of target hardware watchpoints."), _("\
14975 Specify \"unlimited\" for unlimited hardware watchpoints."),
14976 NULL
, show_hardware_watchpoint_limit
,
14977 &remote_set_cmdlist
,
14978 &remote_show_cmdlist
);
14979 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14981 &remote_hw_watchpoint_length_limit
, _("\
14982 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14983 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14984 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14985 NULL
, show_hardware_watchpoint_length_limit
,
14986 &remote_set_cmdlist
, &remote_show_cmdlist
);
14987 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14988 &remote_hw_breakpoint_limit
, _("\
14989 Set the maximum number of target hardware breakpoints."), _("\
14990 Show the maximum number of target hardware breakpoints."), _("\
14991 Specify \"unlimited\" for unlimited hardware breakpoints."),
14992 NULL
, show_hardware_breakpoint_limit
,
14993 &remote_set_cmdlist
, &remote_show_cmdlist
);
14995 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14996 &remote_address_size
, _("\
14997 Set the maximum size of the address (in bits) in a memory packet."), _("\
14998 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
15000 NULL
, /* FIXME: i18n: */
15001 &setlist
, &showlist
);
15003 init_all_packet_configs ();
15005 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
15006 "X", "binary-download", 1);
15008 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
15009 "vCont", "verbose-resume", 0);
15011 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
15012 "QPassSignals", "pass-signals", 0);
15014 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
15015 "QCatchSyscalls", "catch-syscalls", 0);
15017 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
15018 "QProgramSignals", "program-signals", 0);
15020 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
15021 "QSetWorkingDir", "set-working-dir", 0);
15023 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
15024 "QStartupWithShell", "startup-with-shell", 0);
15026 add_packet_config_cmd (&remote_protocol_packets
15027 [PACKET_QEnvironmentHexEncoded
],
15028 "QEnvironmentHexEncoded", "environment-hex-encoded",
15031 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
15032 "QEnvironmentReset", "environment-reset",
15035 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
15036 "QEnvironmentUnset", "environment-unset",
15039 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
15040 "qSymbol", "symbol-lookup", 0);
15042 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
15043 "P", "set-register", 1);
15045 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
15046 "p", "fetch-register", 1);
15048 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
15049 "Z0", "software-breakpoint", 0);
15051 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
15052 "Z1", "hardware-breakpoint", 0);
15054 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
15055 "Z2", "write-watchpoint", 0);
15057 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
15058 "Z3", "read-watchpoint", 0);
15060 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
15061 "Z4", "access-watchpoint", 0);
15063 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
15064 "qXfer:auxv:read", "read-aux-vector", 0);
15066 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
15067 "qXfer:exec-file:read", "pid-to-exec-file", 0);
15069 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
15070 "qXfer:features:read", "target-features", 0);
15072 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
15073 "qXfer:libraries:read", "library-info", 0);
15075 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
15076 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
15078 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
15079 "qXfer:memory-map:read", "memory-map", 0);
15081 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
15082 "qXfer:osdata:read", "osdata", 0);
15084 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
15085 "qXfer:threads:read", "threads", 0);
15087 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
15088 "qXfer:siginfo:read", "read-siginfo-object", 0);
15090 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
15091 "qXfer:siginfo:write", "write-siginfo-object", 0);
15093 add_packet_config_cmd
15094 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
15095 "qXfer:traceframe-info:read", "traceframe-info", 0);
15097 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
15098 "qXfer:uib:read", "unwind-info-block", 0);
15100 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
15101 "qGetTLSAddr", "get-thread-local-storage-address",
15104 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
15105 "qGetTIBAddr", "get-thread-information-block-address",
15108 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
15109 "bc", "reverse-continue", 0);
15111 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
15112 "bs", "reverse-step", 0);
15114 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
15115 "qSupported", "supported-packets", 0);
15117 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
15118 "qSearch:memory", "search-memory", 0);
15120 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
15121 "qTStatus", "trace-status", 0);
15123 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
15124 "vFile:setfs", "hostio-setfs", 0);
15126 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
15127 "vFile:open", "hostio-open", 0);
15129 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
15130 "vFile:pread", "hostio-pread", 0);
15132 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
15133 "vFile:pwrite", "hostio-pwrite", 0);
15135 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
15136 "vFile:close", "hostio-close", 0);
15138 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
15139 "vFile:unlink", "hostio-unlink", 0);
15141 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
15142 "vFile:readlink", "hostio-readlink", 0);
15144 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
15145 "vFile:fstat", "hostio-fstat", 0);
15147 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
15148 "vAttach", "attach", 0);
15150 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
15153 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
15154 "QStartNoAckMode", "noack", 0);
15156 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
15157 "vKill", "kill", 0);
15159 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
15160 "qAttached", "query-attached", 0);
15162 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
15163 "ConditionalTracepoints",
15164 "conditional-tracepoints", 0);
15166 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
15167 "ConditionalBreakpoints",
15168 "conditional-breakpoints", 0);
15170 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
15171 "BreakpointCommands",
15172 "breakpoint-commands", 0);
15174 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
15175 "FastTracepoints", "fast-tracepoints", 0);
15177 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
15178 "TracepointSource", "TracepointSource", 0);
15180 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
15181 "QAllow", "allow", 0);
15183 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
15184 "StaticTracepoints", "static-tracepoints", 0);
15186 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
15187 "InstallInTrace", "install-in-trace", 0);
15189 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
15190 "qXfer:statictrace:read", "read-sdata-object", 0);
15192 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
15193 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
15195 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
15196 "QDisableRandomization", "disable-randomization", 0);
15198 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
15199 "QAgent", "agent", 0);
15201 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
15202 "QTBuffer:size", "trace-buffer-size", 0);
15204 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
15205 "Qbtrace:off", "disable-btrace", 0);
15207 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
15208 "Qbtrace:bts", "enable-btrace-bts", 0);
15210 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
15211 "Qbtrace:pt", "enable-btrace-pt", 0);
15213 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
15214 "qXfer:btrace", "read-btrace", 0);
15216 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
15217 "qXfer:btrace-conf", "read-btrace-conf", 0);
15219 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
15220 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
15222 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
15223 "multiprocess-feature", "multiprocess-feature", 0);
15225 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
15226 "swbreak-feature", "swbreak-feature", 0);
15228 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
15229 "hwbreak-feature", "hwbreak-feature", 0);
15231 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
15232 "fork-event-feature", "fork-event-feature", 0);
15234 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
15235 "vfork-event-feature", "vfork-event-feature", 0);
15237 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
15238 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
15240 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
15241 "vContSupported", "verbose-resume-supported", 0);
15243 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
15244 "exec-event-feature", "exec-event-feature", 0);
15246 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
15247 "vCtrlC", "ctrl-c", 0);
15249 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
15250 "QThreadEvents", "thread-events", 0);
15252 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
15253 "N stop reply", "no-resumed-stop-reply", 0);
15255 add_packet_config_cmd (&remote_protocol_packets
[PACKET_memory_tagging_feature
],
15256 "memory-tagging-feature", "memory-tagging-feature", 0);
15258 /* Assert that we've registered "set remote foo-packet" commands
15259 for all packet configs. */
15263 for (i
= 0; i
< PACKET_MAX
; i
++)
15265 /* Ideally all configs would have a command associated. Some
15266 still don't though. */
15271 case PACKET_QNonStop
:
15272 case PACKET_EnableDisableTracepoints_feature
:
15273 case PACKET_tracenz_feature
:
15274 case PACKET_DisconnectedTracing_feature
:
15275 case PACKET_augmented_libraries_svr4_read_feature
:
15277 /* Additions to this list need to be well justified:
15278 pre-existing packets are OK; new packets are not. */
15286 /* This catches both forgetting to add a config command, and
15287 forgetting to remove a packet from the exception list. */
15288 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
15292 /* Keep the old ``set remote Z-packet ...'' working. Each individual
15293 Z sub-packet has its own set and show commands, but users may
15294 have sets to this variable in their .gdbinit files (or in their
15296 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
15297 &remote_Z_packet_detect
, _("\
15298 Set use of remote protocol `Z' packets."), _("\
15299 Show use of remote protocol `Z' packets."), _("\
15300 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
15302 set_remote_protocol_Z_packet_cmd
,
15303 show_remote_protocol_Z_packet_cmd
,
15304 /* FIXME: i18n: Use of remote protocol
15305 `Z' packets is %s. */
15306 &remote_set_cmdlist
, &remote_show_cmdlist
);
15308 add_basic_prefix_cmd ("remote", class_files
, _("\
15309 Manipulate files on the remote system.\n\
15310 Transfer files to and from the remote target system."),
15312 0 /* allow-unknown */, &cmdlist
);
15314 add_cmd ("put", class_files
, remote_put_command
,
15315 _("Copy a local file to the remote system."),
15318 add_cmd ("get", class_files
, remote_get_command
,
15319 _("Copy a remote file to the local system."),
15322 add_cmd ("delete", class_files
, remote_delete_command
,
15323 _("Delete a remote file."),
15326 add_setshow_string_noescape_cmd ("exec-file", class_files
,
15327 &remote_exec_file_var
, _("\
15328 Set the remote pathname for \"run\"."), _("\
15329 Show the remote pathname for \"run\"."), NULL
,
15330 set_remote_exec_file
,
15331 show_remote_exec_file
,
15332 &remote_set_cmdlist
,
15333 &remote_show_cmdlist
);
15335 add_setshow_boolean_cmd ("range-stepping", class_run
,
15336 &use_range_stepping
, _("\
15337 Enable or disable range stepping."), _("\
15338 Show whether target-assisted range stepping is enabled."), _("\
15339 If on, and the target supports it, when stepping a source line, GDB\n\
15340 tells the target to step the corresponding range of addresses itself instead\n\
15341 of issuing multiple single-steps. This speeds up source level\n\
15342 stepping. If off, GDB always issues single-steps, even if range\n\
15343 stepping is supported by the target. The default is on."),
15344 set_range_stepping
,
15345 show_range_stepping
,
15349 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
15350 Set watchdog timer."), _("\
15351 Show watchdog timer."), _("\
15352 When non-zero, this timeout is used instead of waiting forever for a target\n\
15353 to finish a low-level step or continue operation. If the specified amount\n\
15354 of time passes without a response from the target, an error occurs."),
15357 &setlist
, &showlist
);
15359 add_setshow_zuinteger_unlimited_cmd ("remote-packet-max-chars", no_class
,
15360 &remote_packet_max_chars
, _("\
15361 Set the maximum number of characters to display for each remote packet."), _("\
15362 Show the maximum number of characters to display for each remote packet."), _("\
15363 Specify \"unlimited\" to display all the characters."),
15364 NULL
, show_remote_packet_max_chars
,
15365 &setdebuglist
, &showdebuglist
);
15367 add_setshow_boolean_cmd ("remote", no_class
, &remote_debug
,
15368 _("Set debugging of remote protocol."),
15369 _("Show debugging of remote protocol."),
15371 When enabled, each packet sent or received with the remote target\n\
15375 &setdebuglist
, &showdebuglist
);
15377 add_setshow_zuinteger_unlimited_cmd ("remotetimeout", no_class
,
15378 &remote_timeout
, _("\
15379 Set timeout limit to wait for target to respond."), _("\
15380 Show timeout limit to wait for target to respond."), _("\
15381 This value is used to set the time limit for gdb to wait for a response\n\
15382 from the target."),
15384 show_remote_timeout
,
15385 &setlist
, &showlist
);
15387 /* Eventually initialize fileio. See fileio.c */
15388 initialize_remote_fileio (&remote_set_cmdlist
, &remote_show_cmdlist
);
15391 selftests::register_test ("remote_memory_tagging",
15392 selftests::test_memory_tagging_functions
);