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 char *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 gdb_assert (remote_exec_file_var
!= NULL
);
1359 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
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 /* Does the target support this packet? */
1877 enum packet_support support
;
1880 static enum packet_support
packet_config_support (struct packet_config
*config
);
1881 static enum packet_support
packet_support (int packet
);
1884 show_packet_config_cmd (struct packet_config
*config
)
1886 const char *support
= "internal-error";
1888 switch (packet_config_support (config
))
1891 support
= "enabled";
1893 case PACKET_DISABLE
:
1894 support
= "disabled";
1896 case PACKET_SUPPORT_UNKNOWN
:
1897 support
= "unknown";
1900 switch (config
->detect
)
1902 case AUTO_BOOLEAN_AUTO
:
1903 printf_filtered (_("Support for the `%s' packet "
1904 "is auto-detected, currently %s.\n"),
1905 config
->name
, support
);
1907 case AUTO_BOOLEAN_TRUE
:
1908 case AUTO_BOOLEAN_FALSE
:
1909 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1910 config
->name
, support
);
1916 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1917 const char *title
, int legacy
)
1923 config
->name
= name
;
1924 config
->title
= title
;
1925 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet.",
1927 show_doc
= xstrprintf ("Show current use of remote "
1928 "protocol `%s' (%s) packet.",
1930 /* set/show TITLE-packet {auto,on,off} */
1931 cmd_name
= xstrprintf ("%s-packet", title
);
1932 set_show_commands cmds
1933 = add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1934 &config
->detect
, set_doc
,
1935 show_doc
, NULL
, /* help_doc */
1937 show_remote_protocol_packet_cmd
,
1938 &remote_set_cmdlist
, &remote_show_cmdlist
);
1940 /* The command code copies the documentation strings. */
1944 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1949 legacy_name
= xstrprintf ("%s-packet", name
);
1950 add_alias_cmd (legacy_name
, cmds
.set
, class_obscure
, 0,
1951 &remote_set_cmdlist
);
1952 add_alias_cmd (legacy_name
, cmds
.show
, class_obscure
, 0,
1953 &remote_show_cmdlist
);
1957 static enum packet_result
1958 packet_check_result (const char *buf
)
1962 /* The stub recognized the packet request. Check that the
1963 operation succeeded. */
1965 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1967 /* "Enn" - definitely an error. */
1968 return PACKET_ERROR
;
1970 /* Always treat "E." as an error. This will be used for
1971 more verbose error messages, such as E.memtypes. */
1972 if (buf
[0] == 'E' && buf
[1] == '.')
1973 return PACKET_ERROR
;
1975 /* The packet may or may not be OK. Just assume it is. */
1979 /* The stub does not support the packet. */
1980 return PACKET_UNKNOWN
;
1983 static enum packet_result
1984 packet_check_result (const gdb::char_vector
&buf
)
1986 return packet_check_result (buf
.data ());
1989 static enum packet_result
1990 packet_ok (const char *buf
, struct packet_config
*config
)
1992 enum packet_result result
;
1994 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1995 && config
->support
== PACKET_DISABLE
)
1996 internal_error (__FILE__
, __LINE__
,
1997 _("packet_ok: attempt to use a disabled packet"));
1999 result
= packet_check_result (buf
);
2004 /* The stub recognized the packet request. */
2005 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
2007 remote_debug_printf ("Packet %s (%s) is supported",
2008 config
->name
, config
->title
);
2009 config
->support
= PACKET_ENABLE
;
2012 case PACKET_UNKNOWN
:
2013 /* The stub does not support the packet. */
2014 if (config
->detect
== AUTO_BOOLEAN_AUTO
2015 && config
->support
== PACKET_ENABLE
)
2017 /* If the stub previously indicated that the packet was
2018 supported then there is a protocol error. */
2019 error (_("Protocol error: %s (%s) conflicting enabled responses."),
2020 config
->name
, config
->title
);
2022 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
2024 /* The user set it wrong. */
2025 error (_("Enabled packet %s (%s) not recognized by stub"),
2026 config
->name
, config
->title
);
2029 remote_debug_printf ("Packet %s (%s) is NOT supported",
2030 config
->name
, config
->title
);
2031 config
->support
= PACKET_DISABLE
;
2038 static enum packet_result
2039 packet_ok (const gdb::char_vector
&buf
, struct packet_config
*config
)
2041 return packet_ok (buf
.data (), config
);
2058 PACKET_vFile_pwrite
,
2060 PACKET_vFile_unlink
,
2061 PACKET_vFile_readlink
,
2064 PACKET_qXfer_features
,
2065 PACKET_qXfer_exec_file
,
2066 PACKET_qXfer_libraries
,
2067 PACKET_qXfer_libraries_svr4
,
2068 PACKET_qXfer_memory_map
,
2069 PACKET_qXfer_osdata
,
2070 PACKET_qXfer_threads
,
2071 PACKET_qXfer_statictrace_read
,
2072 PACKET_qXfer_traceframe_info
,
2078 PACKET_QPassSignals
,
2079 PACKET_QCatchSyscalls
,
2080 PACKET_QProgramSignals
,
2081 PACKET_QSetWorkingDir
,
2082 PACKET_QStartupWithShell
,
2083 PACKET_QEnvironmentHexEncoded
,
2084 PACKET_QEnvironmentReset
,
2085 PACKET_QEnvironmentUnset
,
2087 PACKET_qSearch_memory
,
2090 PACKET_QStartNoAckMode
,
2092 PACKET_qXfer_siginfo_read
,
2093 PACKET_qXfer_siginfo_write
,
2096 /* Support for conditional tracepoints. */
2097 PACKET_ConditionalTracepoints
,
2099 /* Support for target-side breakpoint conditions. */
2100 PACKET_ConditionalBreakpoints
,
2102 /* Support for target-side breakpoint commands. */
2103 PACKET_BreakpointCommands
,
2105 /* Support for fast tracepoints. */
2106 PACKET_FastTracepoints
,
2108 /* Support for static tracepoints. */
2109 PACKET_StaticTracepoints
,
2111 /* Support for installing tracepoints while a trace experiment is
2113 PACKET_InstallInTrace
,
2117 PACKET_TracepointSource
,
2120 PACKET_QDisableRandomization
,
2122 PACKET_QTBuffer_size
,
2126 PACKET_qXfer_btrace
,
2128 /* Support for the QNonStop packet. */
2131 /* Support for the QThreadEvents packet. */
2132 PACKET_QThreadEvents
,
2134 /* Support for multi-process extensions. */
2135 PACKET_multiprocess_feature
,
2137 /* Support for enabling and disabling tracepoints while a trace
2138 experiment is running. */
2139 PACKET_EnableDisableTracepoints_feature
,
2141 /* Support for collecting strings using the tracenz bytecode. */
2142 PACKET_tracenz_feature
,
2144 /* Support for continuing to run a trace experiment while GDB is
2146 PACKET_DisconnectedTracing_feature
,
2148 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2149 PACKET_augmented_libraries_svr4_read_feature
,
2151 /* Support for the qXfer:btrace-conf:read packet. */
2152 PACKET_qXfer_btrace_conf
,
2154 /* Support for the Qbtrace-conf:bts:size packet. */
2155 PACKET_Qbtrace_conf_bts_size
,
2157 /* Support for swbreak+ feature. */
2158 PACKET_swbreak_feature
,
2160 /* Support for hwbreak+ feature. */
2161 PACKET_hwbreak_feature
,
2163 /* Support for fork events. */
2164 PACKET_fork_event_feature
,
2166 /* Support for vfork events. */
2167 PACKET_vfork_event_feature
,
2169 /* Support for the Qbtrace-conf:pt:size packet. */
2170 PACKET_Qbtrace_conf_pt_size
,
2172 /* Support for exec events. */
2173 PACKET_exec_event_feature
,
2175 /* Support for query supported vCont actions. */
2176 PACKET_vContSupported
,
2178 /* Support remote CTRL-C. */
2181 /* Support TARGET_WAITKIND_NO_RESUMED. */
2184 /* Support for memory tagging, allocation tag fetch/store
2185 packets and the tag violation stop replies. */
2186 PACKET_memory_tagging_feature
,
2191 /* FIXME: needs to be per-remote-target. Ignoring this for now,
2192 assuming all remote targets are the same server (thus all support
2193 the same packets). */
2194 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
2196 /* Returns the packet's corresponding "set remote foo-packet" command
2197 state. See struct packet_config for more details. */
2199 static enum auto_boolean
2200 packet_set_cmd_state (int packet
)
2202 return remote_protocol_packets
[packet
].detect
;
2205 /* Returns whether a given packet or feature is supported. This takes
2206 into account the state of the corresponding "set remote foo-packet"
2207 command, which may be used to bypass auto-detection. */
2209 static enum packet_support
2210 packet_config_support (struct packet_config
*config
)
2212 switch (config
->detect
)
2214 case AUTO_BOOLEAN_TRUE
:
2215 return PACKET_ENABLE
;
2216 case AUTO_BOOLEAN_FALSE
:
2217 return PACKET_DISABLE
;
2218 case AUTO_BOOLEAN_AUTO
:
2219 return config
->support
;
2221 gdb_assert_not_reached (_("bad switch"));
2225 /* Same as packet_config_support, but takes the packet's enum value as
2228 static enum packet_support
2229 packet_support (int packet
)
2231 struct packet_config
*config
= &remote_protocol_packets
[packet
];
2233 return packet_config_support (config
);
2237 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
2238 struct cmd_list_element
*c
,
2241 struct packet_config
*packet
;
2243 for (packet
= remote_protocol_packets
;
2244 packet
< &remote_protocol_packets
[PACKET_MAX
];
2247 if (&packet
->detect
== c
->var
)
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
.kind
= TARGET_WAITKIND_STOPPED
;
4500 ws
.value
.sig
= GDB_SIGNAL_0
;
4503 switch_to_thread (thread
);
4504 thread
->set_stop_pc (get_frame_pc (get_current_frame ()));
4505 set_current_sal_from_frame (get_current_frame ());
4507 /* For "info program". */
4508 set_last_target_status (this, thread
->ptid
, ws
);
4510 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4512 enum gdb_signal sig
= ws
.value
.sig
;
4514 if (signal_print_state (sig
))
4515 gdb::observers::signal_received
.notify (sig
);
4517 gdb::observers::normal_stop
.notify (NULL
, 1);
4520 /* Process all initial stop replies the remote side sent in response
4521 to the ? packet. These indicate threads that were already stopped
4522 on initial connection. We mark these threads as stopped and print
4523 their current frame before giving the user the prompt. */
4526 remote_target::process_initial_stop_replies (int from_tty
)
4528 int pending_stop_replies
= stop_reply_queue_length ();
4529 struct thread_info
*selected
= NULL
;
4530 struct thread_info
*lowest_stopped
= NULL
;
4531 struct thread_info
*first
= NULL
;
4533 /* This is only used when the target is non-stop. */
4534 gdb_assert (target_is_non_stop_p ());
4536 /* Consume the initial pending events. */
4537 while (pending_stop_replies
-- > 0)
4539 ptid_t waiton_ptid
= minus_one_ptid
;
4541 struct target_waitstatus ws
;
4542 int ignore_event
= 0;
4544 memset (&ws
, 0, sizeof (ws
));
4545 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4547 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4551 case TARGET_WAITKIND_IGNORE
:
4552 case TARGET_WAITKIND_NO_RESUMED
:
4553 case TARGET_WAITKIND_SIGNALLED
:
4554 case TARGET_WAITKIND_EXITED
:
4555 /* We shouldn't see these, but if we do, just ignore. */
4556 remote_debug_printf ("event ignored");
4560 case TARGET_WAITKIND_EXECD
:
4561 xfree (ws
.value
.execd_pathname
);
4570 thread_info
*evthread
= find_thread_ptid (this, event_ptid
);
4572 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4574 enum gdb_signal sig
= ws
.value
.sig
;
4576 /* Stubs traditionally report SIGTRAP as initial signal,
4577 instead of signal 0. Suppress it. */
4578 if (sig
== GDB_SIGNAL_TRAP
)
4580 evthread
->set_stop_signal (sig
);
4584 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4585 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4586 evthread
->set_pending_waitstatus (ws
);
4588 set_executing (this, event_ptid
, false);
4589 set_running (this, event_ptid
, false);
4590 get_remote_thread_info (evthread
)->set_not_resumed ();
4593 /* "Notice" the new inferiors before anything related to
4594 registers/memory. */
4595 for (inferior
*inf
: all_non_exited_inferiors (this))
4597 inf
->needs_setup
= 1;
4601 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4602 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4607 /* If all-stop on top of non-stop, pause all threads. Note this
4608 records the threads' stop pc, so must be done after "noticing"
4613 /* At this point, the remote target is not async. It needs to be for
4614 the poll in stop_all_threads to consider events from it, so enable
4616 gdb_assert (!this->is_async_p ());
4617 SCOPE_EXIT
{ target_async (0); };
4619 stop_all_threads ();
4622 /* If all threads of an inferior were already stopped, we
4623 haven't setup the inferior yet. */
4624 for (inferior
*inf
: all_non_exited_inferiors (this))
4626 if (inf
->needs_setup
)
4628 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4629 switch_to_thread_no_regs (thread
);
4635 /* Now go over all threads that are stopped, and print their current
4636 frame. If all-stop, then if there's a signalled thread, pick
4638 for (thread_info
*thread
: all_non_exited_threads (this))
4644 thread
->set_running (false);
4645 else if (thread
->state
!= THREAD_STOPPED
)
4648 if (selected
== nullptr && thread
->has_pending_waitstatus ())
4651 if (lowest_stopped
== NULL
4652 || thread
->inf
->num
< lowest_stopped
->inf
->num
4653 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4654 lowest_stopped
= thread
;
4657 print_one_stopped_thread (thread
);
4660 /* In all-stop, we only print the status of one thread, and leave
4661 others with their status pending. */
4664 thread_info
*thread
= selected
;
4666 thread
= lowest_stopped
;
4670 print_one_stopped_thread (thread
);
4674 /* Start the remote connection and sync state. */
4677 remote_target::start_remote (int from_tty
, int extended_p
)
4679 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
4681 struct remote_state
*rs
= get_remote_state ();
4682 struct packet_config
*noack_config
;
4684 /* Signal other parts that we're going through the initial setup,
4685 and so things may not be stable yet. E.g., we don't try to
4686 install tracepoints until we've relocated symbols. Also, a
4687 Ctrl-C before we're connected and synced up can't interrupt the
4688 target. Instead, it offers to drop the (potentially wedged)
4690 rs
->starting_up
= true;
4694 if (interrupt_on_connect
)
4695 send_interrupt_sequence ();
4697 /* Ack any packet which the remote side has already sent. */
4698 remote_serial_write ("+", 1);
4700 /* The first packet we send to the target is the optional "supported
4701 packets" request. If the target can answer this, it will tell us
4702 which later probes to skip. */
4703 remote_query_supported ();
4705 /* If the stub wants to get a QAllow, compose one and send it. */
4706 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4709 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4710 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4711 as a reply to known packet. For packet "vFile:setfs:" it is an
4712 invalid reply and GDB would return error in
4713 remote_hostio_set_filesystem, making remote files access impossible.
4714 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4715 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4717 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4719 putpkt (v_mustreplyempty
);
4720 getpkt (&rs
->buf
, 0);
4721 if (strcmp (rs
->buf
.data (), "OK") == 0)
4722 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4723 else if (strcmp (rs
->buf
.data (), "") != 0)
4724 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4728 /* Next, we possibly activate noack mode.
4730 If the QStartNoAckMode packet configuration is set to AUTO,
4731 enable noack mode if the stub reported a wish for it with
4734 If set to TRUE, then enable noack mode even if the stub didn't
4735 report it in qSupported. If the stub doesn't reply OK, the
4736 session ends with an error.
4738 If FALSE, then don't activate noack mode, regardless of what the
4739 stub claimed should be the default with qSupported. */
4741 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4742 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4744 putpkt ("QStartNoAckMode");
4745 getpkt (&rs
->buf
, 0);
4746 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4752 /* Tell the remote that we are using the extended protocol. */
4754 getpkt (&rs
->buf
, 0);
4757 /* Let the target know which signals it is allowed to pass down to
4759 update_signals_program_target ();
4761 /* Next, if the target can specify a description, read it. We do
4762 this before anything involving memory or registers. */
4763 target_find_description ();
4765 /* Next, now that we know something about the target, update the
4766 address spaces in the program spaces. */
4767 update_address_spaces ();
4769 /* On OSs where the list of libraries is global to all
4770 processes, we fetch them early. */
4771 if (gdbarch_has_global_solist (target_gdbarch ()))
4772 solib_add (NULL
, from_tty
, auto_solib_add
);
4774 if (target_is_non_stop_p ())
4776 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4777 error (_("Non-stop mode requested, but remote "
4778 "does not support non-stop"));
4780 putpkt ("QNonStop:1");
4781 getpkt (&rs
->buf
, 0);
4783 if (strcmp (rs
->buf
.data (), "OK") != 0)
4784 error (_("Remote refused setting non-stop mode with: %s"),
4787 /* Find about threads and processes the stub is already
4788 controlling. We default to adding them in the running state.
4789 The '?' query below will then tell us about which threads are
4791 this->update_thread_list ();
4793 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4795 /* Don't assume that the stub can operate in all-stop mode.
4796 Request it explicitly. */
4797 putpkt ("QNonStop:0");
4798 getpkt (&rs
->buf
, 0);
4800 if (strcmp (rs
->buf
.data (), "OK") != 0)
4801 error (_("Remote refused setting all-stop mode with: %s"),
4805 /* Upload TSVs regardless of whether the target is running or not. The
4806 remote stub, such as GDBserver, may have some predefined or builtin
4807 TSVs, even if the target is not running. */
4808 if (get_trace_status (current_trace_status ()) != -1)
4810 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4812 upload_trace_state_variables (&uploaded_tsvs
);
4813 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4816 /* Check whether the target is running now. */
4818 getpkt (&rs
->buf
, 0);
4820 if (!target_is_non_stop_p ())
4822 char *wait_status
= NULL
;
4824 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4827 error (_("The target is not running (try extended-remote?)"));
4829 /* We're connected, but not running. Drop out before we
4830 call start_remote. */
4831 rs
->starting_up
= false;
4836 /* Save the reply for later. */
4837 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4838 strcpy (wait_status
, rs
->buf
.data ());
4841 /* Fetch thread list. */
4842 target_update_thread_list ();
4844 /* Let the stub know that we want it to return the thread. */
4845 set_continue_thread (minus_one_ptid
);
4847 if (thread_count (this) == 0)
4849 /* Target has no concept of threads at all. GDB treats
4850 non-threaded target as single-threaded; add a main
4852 thread_info
*tp
= add_current_inferior_and_thread (wait_status
);
4853 get_remote_thread_info (tp
)->set_resumed ();
4857 /* We have thread information; select the thread the target
4858 says should be current. If we're reconnecting to a
4859 multi-threaded program, this will ideally be the thread
4860 that last reported an event before GDB disconnected. */
4861 ptid_t curr_thread
= get_current_thread (wait_status
);
4862 if (curr_thread
== null_ptid
)
4864 /* Odd... The target was able to list threads, but not
4865 tell us which thread was current (no "thread"
4866 register in T stop reply?). Just pick the first
4867 thread in the thread list then. */
4869 remote_debug_printf ("warning: couldn't determine remote "
4870 "current thread; picking first in list.");
4872 for (thread_info
*tp
: all_non_exited_threads (this,
4875 switch_to_thread (tp
);
4880 switch_to_thread (find_thread_ptid (this, curr_thread
));
4883 /* init_wait_for_inferior should be called before get_offsets in order
4884 to manage `inserted' flag in bp loc in a correct state.
4885 breakpoint_init_inferior, called from init_wait_for_inferior, set
4886 `inserted' flag to 0, while before breakpoint_re_set, called from
4887 start_remote, set `inserted' flag to 1. In the initialization of
4888 inferior, breakpoint_init_inferior should be called first, and then
4889 breakpoint_re_set can be called. If this order is broken, state of
4890 `inserted' flag is wrong, and cause some problems on breakpoint
4892 init_wait_for_inferior ();
4894 get_offsets (); /* Get text, data & bss offsets. */
4896 /* If we could not find a description using qXfer, and we know
4897 how to do it some other way, try again. This is not
4898 supported for non-stop; it could be, but it is tricky if
4899 there are no stopped threads when we connect. */
4900 if (remote_read_description_p (this)
4901 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4903 target_clear_description ();
4904 target_find_description ();
4907 /* Use the previously fetched status. */
4908 gdb_assert (wait_status
!= NULL
);
4909 strcpy (rs
->buf
.data (), wait_status
);
4910 rs
->cached_wait_status
= 1;
4912 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4916 /* Clear WFI global state. Do this before finding about new
4917 threads and inferiors, and setting the current inferior.
4918 Otherwise we would clear the proceed status of the current
4919 inferior when we want its stop_soon state to be preserved
4920 (see notice_new_inferior). */
4921 init_wait_for_inferior ();
4923 /* In non-stop, we will either get an "OK", meaning that there
4924 are no stopped threads at this time; or, a regular stop
4925 reply. In the latter case, there may be more than one thread
4926 stopped --- we pull them all out using the vStopped
4928 if (strcmp (rs
->buf
.data (), "OK") != 0)
4930 struct notif_client
*notif
= ¬if_client_stop
;
4932 /* remote_notif_get_pending_replies acks this one, and gets
4934 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4935 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4936 remote_notif_get_pending_events (notif
);
4939 if (thread_count (this) == 0)
4942 error (_("The target is not running (try extended-remote?)"));
4944 /* We're connected, but not running. Drop out before we
4945 call start_remote. */
4946 rs
->starting_up
= false;
4950 /* Report all signals during attach/startup. */
4953 /* If there are already stopped threads, mark them stopped and
4954 report their stops before giving the prompt to the user. */
4955 process_initial_stop_replies (from_tty
);
4957 if (target_can_async_p ())
4961 /* If we connected to a live target, do some additional setup. */
4962 if (target_has_execution ())
4964 /* No use without a symbol-file. */
4965 if (current_program_space
->symfile_object_file
)
4966 remote_check_symbols ();
4969 /* Possibly the target has been engaged in a trace run started
4970 previously; find out where things are at. */
4971 if (get_trace_status (current_trace_status ()) != -1)
4973 struct uploaded_tp
*uploaded_tps
= NULL
;
4975 if (current_trace_status ()->running
)
4976 printf_filtered (_("Trace is already running on the target.\n"));
4978 upload_tracepoints (&uploaded_tps
);
4980 merge_uploaded_tracepoints (&uploaded_tps
);
4983 /* Possibly the target has been engaged in a btrace record started
4984 previously; find out where things are at. */
4985 remote_btrace_maybe_reopen ();
4987 /* The thread and inferior lists are now synchronized with the
4988 target, our symbols have been relocated, and we're merged the
4989 target's tracepoints with ours. We're done with basic start
4991 rs
->starting_up
= false;
4993 /* Maybe breakpoints are global and need to be inserted now. */
4994 if (breakpoints_should_be_inserted_now ())
4995 insert_breakpoints ();
4999 remote_target::connection_string ()
5001 remote_state
*rs
= get_remote_state ();
5003 if (rs
->remote_desc
->name
!= NULL
)
5004 return rs
->remote_desc
->name
;
5009 /* Open a connection to a remote debugger.
5010 NAME is the filename used for communication. */
5013 remote_target::open (const char *name
, int from_tty
)
5015 open_1 (name
, from_tty
, 0);
5018 /* Open a connection to a remote debugger using the extended
5019 remote gdb protocol. NAME is the filename used for communication. */
5022 extended_remote_target::open (const char *name
, int from_tty
)
5024 open_1 (name
, from_tty
, 1 /*extended_p */);
5027 /* Reset all packets back to "unknown support". Called when opening a
5028 new connection to a remote target. */
5031 reset_all_packet_configs_support (void)
5035 for (i
= 0; i
< PACKET_MAX
; i
++)
5036 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5039 /* Initialize all packet configs. */
5042 init_all_packet_configs (void)
5046 for (i
= 0; i
< PACKET_MAX
; i
++)
5048 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
5049 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5053 /* Symbol look-up. */
5056 remote_target::remote_check_symbols ()
5061 /* The remote side has no concept of inferiors that aren't running
5062 yet, it only knows about running processes. If we're connected
5063 but our current inferior is not running, we should not invite the
5064 remote target to request symbol lookups related to its
5065 (unrelated) current process. */
5066 if (!target_has_execution ())
5069 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
5072 /* Make sure the remote is pointing at the right process. Note
5073 there's no way to select "no process". */
5074 set_general_process ();
5076 /* Allocate a message buffer. We can't reuse the input buffer in RS,
5077 because we need both at the same time. */
5078 gdb::char_vector
msg (get_remote_packet_size ());
5079 gdb::char_vector
reply (get_remote_packet_size ());
5081 /* Invite target to request symbol lookups. */
5083 putpkt ("qSymbol::");
5085 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
5087 while (startswith (reply
.data (), "qSymbol:"))
5089 struct bound_minimal_symbol sym
;
5092 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
5095 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
5096 if (sym
.minsym
== NULL
)
5097 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
5101 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5102 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
5104 /* If this is a function address, return the start of code
5105 instead of any data function descriptor. */
5106 sym_addr
= gdbarch_convert_from_func_ptr_addr
5107 (target_gdbarch (), sym_addr
, current_inferior ()->top_target ());
5109 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
5110 phex_nz (sym_addr
, addr_size
), &reply
[8]);
5113 putpkt (msg
.data ());
5118 static struct serial
*
5119 remote_serial_open (const char *name
)
5121 static int udp_warning
= 0;
5123 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
5124 of in ser-tcp.c, because it is the remote protocol assuming that the
5125 serial connection is reliable and not the serial connection promising
5127 if (!udp_warning
&& startswith (name
, "udp:"))
5129 warning (_("The remote protocol may be unreliable over UDP.\n"
5130 "Some events may be lost, rendering further debugging "
5135 return serial_open (name
);
5138 /* Inform the target of our permission settings. The permission flags
5139 work without this, but if the target knows the settings, it can do
5140 a couple things. First, it can add its own check, to catch cases
5141 that somehow manage to get by the permissions checks in target
5142 methods. Second, if the target is wired to disallow particular
5143 settings (for instance, a system in the field that is not set up to
5144 be able to stop at a breakpoint), it can object to any unavailable
5148 remote_target::set_permissions ()
5150 struct remote_state
*rs
= get_remote_state ();
5152 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
5153 "WriteReg:%x;WriteMem:%x;"
5154 "InsertBreak:%x;InsertTrace:%x;"
5155 "InsertFastTrace:%x;Stop:%x",
5156 may_write_registers
, may_write_memory
,
5157 may_insert_breakpoints
, may_insert_tracepoints
,
5158 may_insert_fast_tracepoints
, may_stop
);
5160 getpkt (&rs
->buf
, 0);
5162 /* If the target didn't like the packet, warn the user. Do not try
5163 to undo the user's settings, that would just be maddening. */
5164 if (strcmp (rs
->buf
.data (), "OK") != 0)
5165 warning (_("Remote refused setting permissions with: %s"),
5169 /* This type describes each known response to the qSupported
5171 struct protocol_feature
5173 /* The name of this protocol feature. */
5176 /* The default for this protocol feature. */
5177 enum packet_support default_support
;
5179 /* The function to call when this feature is reported, or after
5180 qSupported processing if the feature is not supported.
5181 The first argument points to this structure. The second
5182 argument indicates whether the packet requested support be
5183 enabled, disabled, or probed (or the default, if this function
5184 is being called at the end of processing and this feature was
5185 not reported). The third argument may be NULL; if not NULL, it
5186 is a NUL-terminated string taken from the packet following
5187 this feature's name and an equals sign. */
5188 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5189 enum packet_support
, const char *);
5191 /* The corresponding packet for this feature. Only used if
5192 FUNC is remote_supported_packet. */
5197 remote_supported_packet (remote_target
*remote
,
5198 const struct protocol_feature
*feature
,
5199 enum packet_support support
,
5200 const char *argument
)
5204 warning (_("Remote qSupported response supplied an unexpected value for"
5205 " \"%s\"."), feature
->name
);
5209 remote_protocol_packets
[feature
->packet
].support
= support
;
5213 remote_target::remote_packet_size (const protocol_feature
*feature
,
5214 enum packet_support support
, const char *value
)
5216 struct remote_state
*rs
= get_remote_state ();
5221 if (support
!= PACKET_ENABLE
)
5224 if (value
== NULL
|| *value
== '\0')
5226 warning (_("Remote target reported \"%s\" without a size."),
5232 packet_size
= strtol (value
, &value_end
, 16);
5233 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5235 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5236 feature
->name
, value
);
5240 /* Record the new maximum packet size. */
5241 rs
->explicit_packet_size
= packet_size
;
5245 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5246 enum packet_support support
, const char *value
)
5248 remote
->remote_packet_size (feature
, support
, value
);
5251 static const struct protocol_feature remote_protocol_features
[] = {
5252 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5253 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5254 PACKET_qXfer_auxv
},
5255 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5256 PACKET_qXfer_exec_file
},
5257 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5258 PACKET_qXfer_features
},
5259 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5260 PACKET_qXfer_libraries
},
5261 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5262 PACKET_qXfer_libraries_svr4
},
5263 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5264 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5265 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5266 PACKET_qXfer_memory_map
},
5267 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5268 PACKET_qXfer_osdata
},
5269 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5270 PACKET_qXfer_threads
},
5271 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5272 PACKET_qXfer_traceframe_info
},
5273 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5274 PACKET_QPassSignals
},
5275 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5276 PACKET_QCatchSyscalls
},
5277 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5278 PACKET_QProgramSignals
},
5279 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5280 PACKET_QSetWorkingDir
},
5281 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5282 PACKET_QStartupWithShell
},
5283 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5284 PACKET_QEnvironmentHexEncoded
},
5285 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5286 PACKET_QEnvironmentReset
},
5287 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5288 PACKET_QEnvironmentUnset
},
5289 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5290 PACKET_QStartNoAckMode
},
5291 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5292 PACKET_multiprocess_feature
},
5293 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5294 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5295 PACKET_qXfer_siginfo_read
},
5296 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5297 PACKET_qXfer_siginfo_write
},
5298 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5299 PACKET_ConditionalTracepoints
},
5300 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5301 PACKET_ConditionalBreakpoints
},
5302 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5303 PACKET_BreakpointCommands
},
5304 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5305 PACKET_FastTracepoints
},
5306 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5307 PACKET_StaticTracepoints
},
5308 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5309 PACKET_InstallInTrace
},
5310 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5311 PACKET_DisconnectedTracing_feature
},
5312 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5314 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5316 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5317 PACKET_TracepointSource
},
5318 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5320 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5321 PACKET_EnableDisableTracepoints_feature
},
5322 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5323 PACKET_qXfer_fdpic
},
5324 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5326 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5327 PACKET_QDisableRandomization
},
5328 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5329 { "QTBuffer:size", PACKET_DISABLE
,
5330 remote_supported_packet
, PACKET_QTBuffer_size
},
5331 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5332 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5333 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5334 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5335 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5336 PACKET_qXfer_btrace
},
5337 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5338 PACKET_qXfer_btrace_conf
},
5339 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5340 PACKET_Qbtrace_conf_bts_size
},
5341 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5342 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5343 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5344 PACKET_fork_event_feature
},
5345 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5346 PACKET_vfork_event_feature
},
5347 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5348 PACKET_exec_event_feature
},
5349 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5350 PACKET_Qbtrace_conf_pt_size
},
5351 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5352 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5353 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5354 { "memory-tagging", PACKET_DISABLE
, remote_supported_packet
,
5355 PACKET_memory_tagging_feature
},
5358 static char *remote_support_xml
;
5360 /* Register string appended to "xmlRegisters=" in qSupported query. */
5363 register_remote_support_xml (const char *xml
)
5365 #if defined(HAVE_LIBEXPAT)
5366 if (remote_support_xml
== NULL
)
5367 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5370 char *copy
= xstrdup (remote_support_xml
+ 13);
5372 char *p
= strtok_r (copy
, ",", &saveptr
);
5376 if (strcmp (p
, xml
) == 0)
5383 while ((p
= strtok_r (NULL
, ",", &saveptr
)) != NULL
);
5386 remote_support_xml
= reconcat (remote_support_xml
,
5387 remote_support_xml
, ",", xml
,
5394 remote_query_supported_append (std::string
*msg
, const char *append
)
5398 msg
->append (append
);
5402 remote_target::remote_query_supported ()
5404 struct remote_state
*rs
= get_remote_state ();
5407 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5409 /* The packet support flags are handled differently for this packet
5410 than for most others. We treat an error, a disabled packet, and
5411 an empty response identically: any features which must be reported
5412 to be used will be automatically disabled. An empty buffer
5413 accomplishes this, since that is also the representation for a list
5414 containing no features. */
5417 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5421 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5422 remote_query_supported_append (&q
, "multiprocess+");
5424 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5425 remote_query_supported_append (&q
, "swbreak+");
5426 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5427 remote_query_supported_append (&q
, "hwbreak+");
5429 remote_query_supported_append (&q
, "qRelocInsn+");
5431 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5432 != AUTO_BOOLEAN_FALSE
)
5433 remote_query_supported_append (&q
, "fork-events+");
5434 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5435 != AUTO_BOOLEAN_FALSE
)
5436 remote_query_supported_append (&q
, "vfork-events+");
5437 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5438 != AUTO_BOOLEAN_FALSE
)
5439 remote_query_supported_append (&q
, "exec-events+");
5441 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5442 remote_query_supported_append (&q
, "vContSupported+");
5444 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5445 remote_query_supported_append (&q
, "QThreadEvents+");
5447 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5448 remote_query_supported_append (&q
, "no-resumed+");
5450 if (packet_set_cmd_state (PACKET_memory_tagging_feature
)
5451 != AUTO_BOOLEAN_FALSE
)
5452 remote_query_supported_append (&q
, "memory-tagging+");
5454 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5455 the qSupported:xmlRegisters=i386 handling. */
5456 if (remote_support_xml
!= NULL
5457 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5458 remote_query_supported_append (&q
, remote_support_xml
);
5460 q
= "qSupported:" + q
;
5461 putpkt (q
.c_str ());
5463 getpkt (&rs
->buf
, 0);
5465 /* If an error occured, warn, but do not return - just reset the
5466 buffer to empty and go on to disable features. */
5467 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5470 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5475 memset (seen
, 0, sizeof (seen
));
5477 next
= rs
->buf
.data ();
5480 enum packet_support is_supported
;
5481 char *p
, *end
, *name_end
, *value
;
5483 /* First separate out this item from the rest of the packet. If
5484 there's another item after this, we overwrite the separator
5485 (terminated strings are much easier to work with). */
5487 end
= strchr (p
, ';');
5490 end
= p
+ strlen (p
);
5500 warning (_("empty item in \"qSupported\" response"));
5505 name_end
= strchr (p
, '=');
5508 /* This is a name=value entry. */
5509 is_supported
= PACKET_ENABLE
;
5510 value
= name_end
+ 1;
5519 is_supported
= PACKET_ENABLE
;
5523 is_supported
= PACKET_DISABLE
;
5527 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5531 warning (_("unrecognized item \"%s\" "
5532 "in \"qSupported\" response"), p
);
5538 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5539 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5541 const struct protocol_feature
*feature
;
5544 feature
= &remote_protocol_features
[i
];
5545 feature
->func (this, feature
, is_supported
, value
);
5550 /* If we increased the packet size, make sure to increase the global
5551 buffer size also. We delay this until after parsing the entire
5552 qSupported packet, because this is the same buffer we were
5554 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5555 rs
->buf
.resize (rs
->explicit_packet_size
);
5557 /* Handle the defaults for unmentioned features. */
5558 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5561 const struct protocol_feature
*feature
;
5563 feature
= &remote_protocol_features
[i
];
5564 feature
->func (this, feature
, feature
->default_support
, NULL
);
5568 /* Serial QUIT handler for the remote serial descriptor.
5570 Defers handling a Ctrl-C until we're done with the current
5571 command/response packet sequence, unless:
5573 - We're setting up the connection. Don't send a remote interrupt
5574 request, as we're not fully synced yet. Quit immediately
5577 - The target has been resumed in the foreground
5578 (target_terminal::is_ours is false) with a synchronous resume
5579 packet, and we're blocked waiting for the stop reply, thus a
5580 Ctrl-C should be immediately sent to the target.
5582 - We get a second Ctrl-C while still within the same serial read or
5583 write. In that case the serial is seemingly wedged --- offer to
5586 - We see a second Ctrl-C without target response, after having
5587 previously interrupted the target. In that case the target/stub
5588 is probably wedged --- offer to quit/disconnect.
5592 remote_target::remote_serial_quit_handler ()
5594 struct remote_state
*rs
= get_remote_state ();
5596 if (check_quit_flag ())
5598 /* If we're starting up, we're not fully synced yet. Quit
5600 if (rs
->starting_up
)
5602 else if (rs
->got_ctrlc_during_io
)
5604 if (query (_("The target is not responding to GDB commands.\n"
5605 "Stop debugging it? ")))
5606 remote_unpush_and_throw (this);
5608 /* If ^C has already been sent once, offer to disconnect. */
5609 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5611 /* All-stop protocol, and blocked waiting for stop reply. Send
5612 an interrupt request. */
5613 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5614 target_interrupt ();
5616 rs
->got_ctrlc_during_io
= 1;
5620 /* The remote_target that is current while the quit handler is
5621 overridden with remote_serial_quit_handler. */
5622 static remote_target
*curr_quit_handler_target
;
5625 remote_serial_quit_handler ()
5627 curr_quit_handler_target
->remote_serial_quit_handler ();
5630 /* Remove the remote target from the target stack of each inferior
5631 that is using it. Upper targets depend on it so remove them
5635 remote_unpush_target (remote_target
*target
)
5637 /* We have to unpush the target from all inferiors, even those that
5639 scoped_restore_current_inferior restore_current_inferior
;
5641 for (inferior
*inf
: all_inferiors (target
))
5643 switch_to_inferior_no_thread (inf
);
5644 pop_all_targets_at_and_above (process_stratum
);
5645 generic_mourn_inferior ();
5648 /* Don't rely on target_close doing this when the target is popped
5649 from the last remote inferior above, because something may be
5650 holding a reference to the target higher up on the stack, meaning
5651 target_close won't be called yet. We lost the connection to the
5652 target, so clear these now, otherwise we may later throw
5653 TARGET_CLOSE_ERROR while trying to tell the remote target to
5655 fileio_handles_invalidate_target (target
);
5659 remote_unpush_and_throw (remote_target
*target
)
5661 remote_unpush_target (target
);
5662 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5666 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5668 remote_target
*curr_remote
= get_current_remote_target ();
5671 error (_("To open a remote debug connection, you need to specify what\n"
5672 "serial device is attached to the remote system\n"
5673 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5675 /* If we're connected to a running target, target_preopen will kill it.
5676 Ask this question first, before target_preopen has a chance to kill
5678 if (curr_remote
!= NULL
&& !target_has_execution ())
5681 && !query (_("Already connected to a remote target. Disconnect? ")))
5682 error (_("Still connected."));
5685 /* Here the possibly existing remote target gets unpushed. */
5686 target_preopen (from_tty
);
5688 remote_fileio_reset ();
5689 reopen_exec_file ();
5692 remote_target
*remote
5693 = (extended_p
? new extended_remote_target () : new remote_target ());
5694 target_ops_up
target_holder (remote
);
5696 remote_state
*rs
= remote
->get_remote_state ();
5698 /* See FIXME above. */
5699 if (!target_async_permitted
)
5700 rs
->wait_forever_enabled_p
= 1;
5702 rs
->remote_desc
= remote_serial_open (name
);
5703 if (!rs
->remote_desc
)
5704 perror_with_name (name
);
5706 if (baud_rate
!= -1)
5708 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5710 /* The requested speed could not be set. Error out to
5711 top level after closing remote_desc. Take care to
5712 set remote_desc to NULL to avoid closing remote_desc
5714 serial_close (rs
->remote_desc
);
5715 rs
->remote_desc
= NULL
;
5716 perror_with_name (name
);
5720 serial_setparity (rs
->remote_desc
, serial_parity
);
5721 serial_raw (rs
->remote_desc
);
5723 /* If there is something sitting in the buffer we might take it as a
5724 response to a command, which would be bad. */
5725 serial_flush_input (rs
->remote_desc
);
5729 puts_filtered ("Remote debugging using ");
5730 puts_filtered (name
);
5731 puts_filtered ("\n");
5734 /* Switch to using the remote target now. */
5735 current_inferior ()->push_target (std::move (target_holder
));
5737 /* Register extra event sources in the event loop. */
5738 rs
->remote_async_inferior_event_token
5739 = create_async_event_handler (remote_async_inferior_event_handler
, nullptr,
5741 rs
->notif_state
= remote_notif_state_allocate (remote
);
5743 /* Reset the target state; these things will be queried either by
5744 remote_query_supported or as they are needed. */
5745 reset_all_packet_configs_support ();
5746 rs
->cached_wait_status
= 0;
5747 rs
->explicit_packet_size
= 0;
5749 rs
->extended
= extended_p
;
5750 rs
->waiting_for_stop_reply
= 0;
5751 rs
->ctrlc_pending_p
= 0;
5752 rs
->got_ctrlc_during_io
= 0;
5754 rs
->general_thread
= not_sent_ptid
;
5755 rs
->continue_thread
= not_sent_ptid
;
5756 rs
->remote_traceframe_number
= -1;
5758 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5760 /* Probe for ability to use "ThreadInfo" query, as required. */
5761 rs
->use_threadinfo_query
= 1;
5762 rs
->use_threadextra_query
= 1;
5764 rs
->readahead_cache
.invalidate ();
5766 if (target_async_permitted
)
5768 /* FIXME: cagney/1999-09-23: During the initial connection it is
5769 assumed that the target is already ready and able to respond to
5770 requests. Unfortunately remote_start_remote() eventually calls
5771 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5772 around this. Eventually a mechanism that allows
5773 wait_for_inferior() to expect/get timeouts will be
5775 rs
->wait_forever_enabled_p
= 0;
5778 /* First delete any symbols previously loaded from shared libraries. */
5779 no_shared_libraries (NULL
, 0);
5781 /* Start the remote connection. If error() or QUIT, discard this
5782 target (we'd otherwise be in an inconsistent state) and then
5783 propogate the error on up the exception chain. This ensures that
5784 the caller doesn't stumble along blindly assuming that the
5785 function succeeded. The CLI doesn't have this problem but other
5786 UI's, such as MI do.
5788 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5789 this function should return an error indication letting the
5790 caller restore the previous state. Unfortunately the command
5791 ``target remote'' is directly wired to this function making that
5792 impossible. On a positive note, the CLI side of this problem has
5793 been fixed - the function set_cmd_context() makes it possible for
5794 all the ``target ....'' commands to share a common callback
5795 function. See cli-dump.c. */
5800 remote
->start_remote (from_tty
, extended_p
);
5802 catch (const gdb_exception
&ex
)
5804 /* Pop the partially set up target - unless something else did
5805 already before throwing the exception. */
5806 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5807 remote_unpush_target (remote
);
5812 remote_btrace_reset (rs
);
5814 if (target_async_permitted
)
5815 rs
->wait_forever_enabled_p
= 1;
5818 /* Detach the specified process. */
5821 remote_target::remote_detach_pid (int pid
)
5823 struct remote_state
*rs
= get_remote_state ();
5825 /* This should not be necessary, but the handling for D;PID in
5826 GDBserver versions prior to 8.2 incorrectly assumes that the
5827 selected process points to the same process we're detaching,
5828 leading to misbehavior (and possibly GDBserver crashing) when it
5829 does not. Since it's easy and cheap, work around it by forcing
5830 GDBserver to select GDB's current process. */
5831 set_general_process ();
5833 if (remote_multi_process_p (rs
))
5834 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5836 strcpy (rs
->buf
.data (), "D");
5839 getpkt (&rs
->buf
, 0);
5841 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5843 else if (rs
->buf
[0] == '\0')
5844 error (_("Remote doesn't know how to detach"));
5846 error (_("Can't detach process."));
5849 /* This detaches a program to which we previously attached, using
5850 inferior_ptid to identify the process. After this is done, GDB
5851 can be used to debug some other program. We better not have left
5852 any breakpoints in the target program or it'll die when it hits
5856 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5858 int pid
= inferior_ptid
.pid ();
5859 struct remote_state
*rs
= get_remote_state ();
5862 if (!target_has_execution ())
5863 error (_("No process to detach from."));
5865 target_announce_detach (from_tty
);
5867 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
5869 /* If we're in breakpoints-always-inserted mode, or the inferior
5870 is running, we have to remove breakpoints before detaching.
5871 We don't do this in common code instead because not all
5872 targets support removing breakpoints while the target is
5873 running. The remote target / gdbserver does, though. */
5874 remove_breakpoints_inf (current_inferior ());
5877 /* Tell the remote target to detach. */
5878 remote_detach_pid (pid
);
5880 /* Exit only if this is the only active inferior. */
5881 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors (this) == 1)
5882 puts_filtered (_("Ending remote debugging.\n"));
5884 thread_info
*tp
= find_thread_ptid (this, inferior_ptid
);
5886 /* Check to see if we are detaching a fork parent. Note that if we
5887 are detaching a fork child, tp == NULL. */
5888 is_fork_parent
= (tp
!= NULL
5889 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5891 /* If doing detach-on-fork, we don't mourn, because that will delete
5892 breakpoints that should be available for the followed inferior. */
5893 if (!is_fork_parent
)
5895 /* Save the pid as a string before mourning, since that will
5896 unpush the remote target, and we need the string after. */
5897 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5899 target_mourn_inferior (inferior_ptid
);
5900 if (print_inferior_events
)
5901 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5902 inf
->num
, infpid
.c_str ());
5906 switch_to_no_thread ();
5907 detach_inferior (current_inferior ());
5912 remote_target::detach (inferior
*inf
, int from_tty
)
5914 remote_detach_1 (inf
, from_tty
);
5918 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5920 remote_detach_1 (inf
, from_tty
);
5923 /* Target follow-fork function for remote targets. On entry, and
5924 at return, the current inferior is the fork parent.
5926 Note that although this is currently only used for extended-remote,
5927 it is named remote_follow_fork in anticipation of using it for the
5928 remote target as well. */
5931 remote_target::follow_fork (inferior
*child_inf
, ptid_t child_ptid
,
5932 target_waitkind fork_kind
, bool follow_child
,
5935 process_stratum_target::follow_fork (child_inf
, child_ptid
,
5936 fork_kind
, follow_child
, detach_fork
);
5938 struct remote_state
*rs
= get_remote_state ();
5940 if ((fork_kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5941 || (fork_kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5943 /* When following the parent and detaching the child, we detach
5944 the child here. For the case of following the child and
5945 detaching the parent, the detach is done in the target-
5946 independent follow fork code in infrun.c. We can't use
5947 target_detach when detaching an unfollowed child because
5948 the client side doesn't know anything about the child. */
5949 if (detach_fork
&& !follow_child
)
5951 /* Detach the fork child. */
5952 remote_detach_pid (child_ptid
.pid ());
5957 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5958 in the program space of the new inferior. */
5961 remote_target::follow_exec (inferior
*follow_inf
, ptid_t ptid
,
5962 const char *execd_pathname
)
5964 process_stratum_target::follow_exec (follow_inf
, ptid
, execd_pathname
);
5966 /* We know that this is a target file name, so if it has the "target:"
5967 prefix we strip it off before saving it in the program space. */
5968 if (is_target_filename (execd_pathname
))
5969 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5971 set_pspace_remote_exec_file (follow_inf
->pspace
, execd_pathname
);
5974 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5977 remote_target::disconnect (const char *args
, int from_tty
)
5980 error (_("Argument given to \"disconnect\" when remotely debugging."));
5982 /* Make sure we unpush even the extended remote targets. Calling
5983 target_mourn_inferior won't unpush, and
5984 remote_target::mourn_inferior won't unpush if there is more than
5985 one inferior left. */
5986 remote_unpush_target (this);
5989 puts_filtered ("Ending remote debugging.\n");
5992 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5993 be chatty about it. */
5996 extended_remote_target::attach (const char *args
, int from_tty
)
5998 struct remote_state
*rs
= get_remote_state ();
6000 char *wait_status
= NULL
;
6002 pid
= parse_pid_to_attach (args
);
6004 /* Remote PID can be freely equal to getpid, do not check it here the same
6005 way as in other targets. */
6007 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
6008 error (_("This target does not support attaching to a process"));
6012 const char *exec_file
= get_exec_file (0);
6015 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
6016 target_pid_to_str (ptid_t (pid
)).c_str ());
6018 printf_unfiltered (_("Attaching to %s\n"),
6019 target_pid_to_str (ptid_t (pid
)).c_str ());
6022 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
6024 getpkt (&rs
->buf
, 0);
6026 switch (packet_ok (rs
->buf
,
6027 &remote_protocol_packets
[PACKET_vAttach
]))
6030 if (!target_is_non_stop_p ())
6032 /* Save the reply for later. */
6033 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
6034 strcpy (wait_status
, rs
->buf
.data ());
6036 else if (strcmp (rs
->buf
.data (), "OK") != 0)
6037 error (_("Attaching to %s failed with: %s"),
6038 target_pid_to_str (ptid_t (pid
)).c_str (),
6041 case PACKET_UNKNOWN
:
6042 error (_("This target does not support attaching to a process"));
6044 error (_("Attaching to %s failed"),
6045 target_pid_to_str (ptid_t (pid
)).c_str ());
6048 switch_to_inferior_no_thread (remote_add_inferior (false, pid
, 1, 0));
6050 inferior_ptid
= ptid_t (pid
);
6052 if (target_is_non_stop_p ())
6054 /* Get list of threads. */
6055 update_thread_list ();
6057 thread_info
*thread
= first_thread_of_inferior (current_inferior ());
6058 if (thread
!= nullptr)
6059 switch_to_thread (thread
);
6061 /* Invalidate our notion of the remote current thread. */
6062 record_currthread (rs
, minus_one_ptid
);
6066 /* Now, if we have thread information, update the main thread's
6068 ptid_t curr_ptid
= remote_current_thread (ptid_t (pid
));
6070 /* Add the main thread to the thread list. */
6071 thread_info
*thr
= add_thread_silent (this, curr_ptid
);
6073 switch_to_thread (thr
);
6075 /* Don't consider the thread stopped until we've processed the
6076 saved stop reply. */
6077 set_executing (this, thr
->ptid
, true);
6080 /* Next, if the target can specify a description, read it. We do
6081 this before anything involving memory or registers. */
6082 target_find_description ();
6084 if (!target_is_non_stop_p ())
6086 /* Use the previously fetched status. */
6087 gdb_assert (wait_status
!= NULL
);
6089 if (target_can_async_p ())
6091 struct notif_event
*reply
6092 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
6094 push_stop_reply ((struct stop_reply
*) reply
);
6100 gdb_assert (wait_status
!= NULL
);
6101 strcpy (rs
->buf
.data (), wait_status
);
6102 rs
->cached_wait_status
= 1;
6107 gdb_assert (wait_status
== NULL
);
6109 gdb_assert (target_can_async_p ());
6114 /* Implementation of the to_post_attach method. */
6117 extended_remote_target::post_attach (int pid
)
6119 /* Get text, data & bss offsets. */
6122 /* In certain cases GDB might not have had the chance to start
6123 symbol lookup up until now. This could happen if the debugged
6124 binary is not using shared libraries, the vsyscall page is not
6125 present (on Linux) and the binary itself hadn't changed since the
6126 debugging process was started. */
6127 if (current_program_space
->symfile_object_file
!= NULL
)
6128 remote_check_symbols();
6132 /* Check for the availability of vCont. This function should also check
6136 remote_target::remote_vcont_probe ()
6138 remote_state
*rs
= get_remote_state ();
6141 strcpy (rs
->buf
.data (), "vCont?");
6143 getpkt (&rs
->buf
, 0);
6144 buf
= rs
->buf
.data ();
6146 /* Make sure that the features we assume are supported. */
6147 if (startswith (buf
, "vCont"))
6150 int support_c
, support_C
;
6152 rs
->supports_vCont
.s
= 0;
6153 rs
->supports_vCont
.S
= 0;
6156 rs
->supports_vCont
.t
= 0;
6157 rs
->supports_vCont
.r
= 0;
6158 while (p
&& *p
== ';')
6161 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6162 rs
->supports_vCont
.s
= 1;
6163 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6164 rs
->supports_vCont
.S
= 1;
6165 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6167 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6169 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6170 rs
->supports_vCont
.t
= 1;
6171 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6172 rs
->supports_vCont
.r
= 1;
6174 p
= strchr (p
, ';');
6177 /* If c, and C are not all supported, we can't use vCont. Clearing
6178 BUF will make packet_ok disable the packet. */
6179 if (!support_c
|| !support_C
)
6183 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
6184 rs
->supports_vCont_probed
= true;
6187 /* Helper function for building "vCont" resumptions. Write a
6188 resumption to P. ENDP points to one-passed-the-end of the buffer
6189 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6190 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6191 resumed thread should be single-stepped and/or signalled. If PTID
6192 equals minus_one_ptid, then all threads are resumed; if PTID
6193 represents a process, then all threads of the process are resumed;
6194 the thread to be stepped and/or signalled is given in the global
6198 remote_target::append_resumption (char *p
, char *endp
,
6199 ptid_t ptid
, int step
, gdb_signal siggnal
)
6201 struct remote_state
*rs
= get_remote_state ();
6203 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6204 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6206 /* GDB is willing to range step. */
6207 && use_range_stepping
6208 /* Target supports range stepping. */
6209 && rs
->supports_vCont
.r
6210 /* We don't currently support range stepping multiple
6211 threads with a wildcard (though the protocol allows it,
6212 so stubs shouldn't make an active effort to forbid
6214 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6216 struct thread_info
*tp
;
6218 if (ptid
== minus_one_ptid
)
6220 /* If we don't know about the target thread's tid, then
6221 we're resuming magic_null_ptid (see caller). */
6222 tp
= find_thread_ptid (this, magic_null_ptid
);
6225 tp
= find_thread_ptid (this, ptid
);
6226 gdb_assert (tp
!= NULL
);
6228 if (tp
->control
.may_range_step
)
6230 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6232 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6233 phex_nz (tp
->control
.step_range_start
,
6235 phex_nz (tp
->control
.step_range_end
,
6239 p
+= xsnprintf (p
, endp
- p
, ";s");
6242 p
+= xsnprintf (p
, endp
- p
, ";s");
6243 else if (siggnal
!= GDB_SIGNAL_0
)
6244 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6246 p
+= xsnprintf (p
, endp
- p
, ";c");
6248 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6252 /* All (-1) threads of process. */
6253 nptid
= ptid_t (ptid
.pid (), -1);
6255 p
+= xsnprintf (p
, endp
- p
, ":");
6256 p
= write_ptid (p
, endp
, nptid
);
6258 else if (ptid
!= minus_one_ptid
)
6260 p
+= xsnprintf (p
, endp
- p
, ":");
6261 p
= write_ptid (p
, endp
, ptid
);
6267 /* Clear the thread's private info on resume. */
6270 resume_clear_thread_private_info (struct thread_info
*thread
)
6272 if (thread
->priv
!= NULL
)
6274 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6276 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6277 priv
->watch_data_address
= 0;
6281 /* Append a vCont continue-with-signal action for threads that have a
6282 non-zero stop signal. */
6285 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6288 for (thread_info
*thread
: all_non_exited_threads (this, ptid
))
6289 if (inferior_ptid
!= thread
->ptid
6290 && thread
->stop_signal () != GDB_SIGNAL_0
)
6292 p
= append_resumption (p
, endp
, thread
->ptid
,
6293 0, thread
->stop_signal ());
6294 thread
->set_stop_signal (GDB_SIGNAL_0
);
6295 resume_clear_thread_private_info (thread
);
6301 /* Set the target running, using the packets that use Hc
6305 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6308 struct remote_state
*rs
= get_remote_state ();
6311 rs
->last_sent_signal
= siggnal
;
6312 rs
->last_sent_step
= step
;
6314 /* The c/s/C/S resume packets use Hc, so set the continue
6316 if (ptid
== minus_one_ptid
)
6317 set_continue_thread (any_thread_ptid
);
6319 set_continue_thread (ptid
);
6321 for (thread_info
*thread
: all_non_exited_threads (this))
6322 resume_clear_thread_private_info (thread
);
6324 buf
= rs
->buf
.data ();
6325 if (::execution_direction
== EXEC_REVERSE
)
6327 /* We don't pass signals to the target in reverse exec mode. */
6328 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6329 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6332 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6333 error (_("Remote reverse-step not supported."));
6334 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6335 error (_("Remote reverse-continue not supported."));
6337 strcpy (buf
, step
? "bs" : "bc");
6339 else if (siggnal
!= GDB_SIGNAL_0
)
6341 buf
[0] = step
? 'S' : 'C';
6342 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6343 buf
[2] = tohex (((int) siggnal
) & 0xf);
6347 strcpy (buf
, step
? "s" : "c");
6352 /* Resume the remote inferior by using a "vCont" packet. The thread
6353 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6354 resumed thread should be single-stepped and/or signalled. If PTID
6355 equals minus_one_ptid, then all threads are resumed; the thread to
6356 be stepped and/or signalled is given in the global INFERIOR_PTID.
6357 This function returns non-zero iff it resumes the inferior.
6359 This function issues a strict subset of all possible vCont commands
6363 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6364 enum gdb_signal siggnal
)
6366 struct remote_state
*rs
= get_remote_state ();
6370 /* No reverse execution actions defined for vCont. */
6371 if (::execution_direction
== EXEC_REVERSE
)
6374 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6375 remote_vcont_probe ();
6377 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6380 p
= rs
->buf
.data ();
6381 endp
= p
+ get_remote_packet_size ();
6383 /* If we could generate a wider range of packets, we'd have to worry
6384 about overflowing BUF. Should there be a generic
6385 "multi-part-packet" packet? */
6387 p
+= xsnprintf (p
, endp
- p
, "vCont");
6389 if (ptid
== magic_null_ptid
)
6391 /* MAGIC_NULL_PTID means that we don't have any active threads,
6392 so we don't have any TID numbers the inferior will
6393 understand. Make sure to only send forms that do not specify
6395 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6397 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6399 /* Resume all threads (of all processes, or of a single
6400 process), with preference for INFERIOR_PTID. This assumes
6401 inferior_ptid belongs to the set of all threads we are about
6403 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6405 /* Step inferior_ptid, with or without signal. */
6406 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6409 /* Also pass down any pending signaled resumption for other
6410 threads not the current. */
6411 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6413 /* And continue others without a signal. */
6414 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6418 /* Scheduler locking; resume only PTID. */
6419 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6422 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6425 if (target_is_non_stop_p ())
6427 /* In non-stop, the stub replies to vCont with "OK". The stop
6428 reply will be reported asynchronously by means of a `%Stop'
6430 getpkt (&rs
->buf
, 0);
6431 if (strcmp (rs
->buf
.data (), "OK") != 0)
6432 error (_("Unexpected vCont reply in non-stop mode: %s"),
6439 /* Tell the remote machine to resume. */
6442 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6444 struct remote_state
*rs
= get_remote_state ();
6446 /* When connected in non-stop mode, the core resumes threads
6447 individually. Resuming remote threads directly in target_resume
6448 would thus result in sending one packet per thread. Instead, to
6449 minimize roundtrip latency, here we just store the resume
6450 request (put the thread in RESUMED_PENDING_VCONT state); the actual remote
6451 resumption will be done in remote_target::commit_resume, where we'll be
6452 able to do vCont action coalescing. */
6453 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6455 remote_thread_info
*remote_thr
;
6457 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6458 remote_thr
= get_remote_thread_info (this, inferior_ptid
);
6460 remote_thr
= get_remote_thread_info (this, ptid
);
6462 /* We don't expect the core to ask to resume an already resumed (from
6463 its point of view) thread. */
6464 gdb_assert (remote_thr
->get_resume_state () == resume_state::NOT_RESUMED
);
6466 remote_thr
->set_resumed_pending_vcont (step
, siggnal
);
6470 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6471 (explained in remote-notif.c:handle_notification) so
6472 remote_notif_process is not called. We need find a place where
6473 it is safe to start a 'vNotif' sequence. It is good to do it
6474 before resuming inferior, because inferior was stopped and no RSP
6475 traffic at that moment. */
6476 if (!target_is_non_stop_p ())
6477 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6479 rs
->last_resume_exec_dir
= ::execution_direction
;
6481 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6482 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6483 remote_resume_with_hc (ptid
, step
, siggnal
);
6485 /* Update resumed state tracked by the remote target. */
6486 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6487 get_remote_thread_info (tp
)->set_resumed ();
6489 /* We are about to start executing the inferior, let's register it
6490 with the event loop. NOTE: this is the one place where all the
6491 execution commands end up. We could alternatively do this in each
6492 of the execution commands in infcmd.c. */
6493 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6494 into infcmd.c in order to allow inferior function calls to work
6495 NOT asynchronously. */
6496 if (target_can_async_p ())
6499 /* We've just told the target to resume. The remote server will
6500 wait for the inferior to stop, and then send a stop reply. In
6501 the mean time, we can't start another command/query ourselves
6502 because the stub wouldn't be ready to process it. This applies
6503 only to the base all-stop protocol, however. In non-stop (which
6504 only supports vCont), the stub replies with an "OK", and is
6505 immediate able to process further serial input. */
6506 if (!target_is_non_stop_p ())
6507 rs
->waiting_for_stop_reply
= 1;
6510 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6512 /* Private per-inferior info for target remote processes. */
6514 struct remote_inferior
: public private_inferior
6516 /* Whether we can send a wildcard vCont for this process. */
6517 bool may_wildcard_vcont
= true;
6520 /* Get the remote private inferior data associated to INF. */
6522 static remote_inferior
*
6523 get_remote_inferior (inferior
*inf
)
6525 if (inf
->priv
== NULL
)
6526 inf
->priv
.reset (new remote_inferior
);
6528 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6531 struct stop_reply
: public notif_event
6535 /* The identifier of the thread about this event */
6538 /* The remote state this event is associated with. When the remote
6539 connection, represented by a remote_state object, is closed,
6540 all the associated stop_reply events should be released. */
6541 struct remote_state
*rs
;
6543 struct target_waitstatus ws
;
6545 /* The architecture associated with the expedited registers. */
6548 /* Expedited registers. This makes remote debugging a bit more
6549 efficient for those targets that provide critical registers as
6550 part of their normal status mechanism (as another roundtrip to
6551 fetch them is avoided). */
6552 std::vector
<cached_reg_t
> regcache
;
6554 enum target_stop_reason stop_reason
;
6556 CORE_ADDR watch_data_address
;
6561 /* Class used to track the construction of a vCont packet in the
6562 outgoing packet buffer. This is used to send multiple vCont
6563 packets if we have more actions than would fit a single packet. */
6568 explicit vcont_builder (remote_target
*remote
)
6575 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6580 /* The remote target. */
6581 remote_target
*m_remote
;
6583 /* Pointer to the first action. P points here if no action has been
6585 char *m_first_action
;
6587 /* Where the next action will be appended. */
6590 /* The end of the buffer. Must never write past this. */
6594 /* Prepare the outgoing buffer for a new vCont packet. */
6597 vcont_builder::restart ()
6599 struct remote_state
*rs
= m_remote
->get_remote_state ();
6601 m_p
= rs
->buf
.data ();
6602 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6603 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6604 m_first_action
= m_p
;
6607 /* If the vCont packet being built has any action, send it to the
6611 vcont_builder::flush ()
6613 struct remote_state
*rs
;
6615 if (m_p
== m_first_action
)
6618 rs
= m_remote
->get_remote_state ();
6619 m_remote
->putpkt (rs
->buf
);
6620 m_remote
->getpkt (&rs
->buf
, 0);
6621 if (strcmp (rs
->buf
.data (), "OK") != 0)
6622 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6625 /* The largest action is range-stepping, with its two addresses. This
6626 is more than sufficient. If a new, bigger action is created, it'll
6627 quickly trigger a failed assertion in append_resumption (and we'll
6629 #define MAX_ACTION_SIZE 200
6631 /* Append a new vCont action in the outgoing packet being built. If
6632 the action doesn't fit the packet along with previous actions, push
6633 what we've got so far to the remote end and start over a new vCont
6634 packet (with the new action). */
6637 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6639 char buf
[MAX_ACTION_SIZE
+ 1];
6641 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6642 ptid
, step
, siggnal
);
6644 /* Check whether this new action would fit in the vCont packet along
6645 with previous actions. If not, send what we've got so far and
6646 start a new vCont packet. */
6647 size_t rsize
= endp
- buf
;
6648 if (rsize
> m_endp
- m_p
)
6653 /* Should now fit. */
6654 gdb_assert (rsize
<= m_endp
- m_p
);
6657 memcpy (m_p
, buf
, rsize
);
6662 /* to_commit_resume implementation. */
6665 remote_target::commit_resumed ()
6667 /* If connected in all-stop mode, we'd send the remote resume
6668 request directly from remote_resume. Likewise if
6669 reverse-debugging, as there are no defined vCont actions for
6670 reverse execution. */
6671 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6674 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6675 instead of resuming all threads of each process individually.
6676 However, if any thread of a process must remain halted, we can't
6677 send wildcard resumes and must send one action per thread.
6679 Care must be taken to not resume threads/processes the server
6680 side already told us are stopped, but the core doesn't know about
6681 yet, because the events are still in the vStopped notification
6684 #1 => vCont s:p1.1;c
6686 #3 <= %Stopped T05 p1.1
6691 #8 (infrun handles the stop for p1.1 and continues stepping)
6692 #9 => vCont s:p1.1;c
6694 The last vCont above would resume thread p1.2 by mistake, because
6695 the server has no idea that the event for p1.2 had not been
6698 The server side must similarly ignore resume actions for the
6699 thread that has a pending %Stopped notification (and any other
6700 threads with events pending), until GDB acks the notification
6701 with vStopped. Otherwise, e.g., the following case is
6704 #1 => g (or any other packet)
6706 #3 <= %Stopped T05 p1.2
6707 #4 => vCont s:p1.1;c
6710 Above, the server must not resume thread p1.2. GDB can't know
6711 that p1.2 stopped until it acks the %Stopped notification, and
6712 since from GDB's perspective all threads should be running, it
6715 Finally, special care must also be given to handling fork/vfork
6716 events. A (v)fork event actually tells us that two processes
6717 stopped -- the parent and the child. Until we follow the fork,
6718 we must not resume the child. Therefore, if we have a pending
6719 fork follow, we must not send a global wildcard resume action
6720 (vCont;c). We can still send process-wide wildcards though. */
6722 /* Start by assuming a global wildcard (vCont;c) is possible. */
6723 bool may_global_wildcard_vcont
= true;
6725 /* And assume every process is individually wildcard-able too. */
6726 for (inferior
*inf
: all_non_exited_inferiors (this))
6728 remote_inferior
*priv
= get_remote_inferior (inf
);
6730 priv
->may_wildcard_vcont
= true;
6733 /* Check for any pending events (not reported or processed yet) and
6734 disable process and global wildcard resumes appropriately. */
6735 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6737 bool any_pending_vcont_resume
= false;
6739 for (thread_info
*tp
: all_non_exited_threads (this))
6741 remote_thread_info
*priv
= get_remote_thread_info (tp
);
6743 /* If a thread of a process is not meant to be resumed, then we
6744 can't wildcard that process. */
6745 if (priv
->get_resume_state () == resume_state::NOT_RESUMED
)
6747 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6749 /* And if we can't wildcard a process, we can't wildcard
6750 everything either. */
6751 may_global_wildcard_vcont
= false;
6755 if (priv
->get_resume_state () == resume_state::RESUMED_PENDING_VCONT
)
6756 any_pending_vcont_resume
= true;
6758 /* If a thread is the parent of an unfollowed fork, then we
6759 can't do a global wildcard, as that would resume the fork
6761 if (is_pending_fork_parent_thread (tp
))
6762 may_global_wildcard_vcont
= false;
6765 /* We didn't have any resumed thread pending a vCont resume, so nothing to
6767 if (!any_pending_vcont_resume
)
6770 /* Now let's build the vCont packet(s). Actions must be appended
6771 from narrower to wider scopes (thread -> process -> global). If
6772 we end up with too many actions for a single packet vcont_builder
6773 flushes the current vCont packet to the remote side and starts a
6775 struct vcont_builder
vcont_builder (this);
6777 /* Threads first. */
6778 for (thread_info
*tp
: all_non_exited_threads (this))
6780 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6782 /* If the thread was previously vCont-resumed, no need to send a specific
6783 action for it. If we didn't receive a resume request for it, don't
6784 send an action for it either. */
6785 if (remote_thr
->get_resume_state () != resume_state::RESUMED_PENDING_VCONT
)
6788 gdb_assert (!thread_is_in_step_over_chain (tp
));
6790 /* We should never be commit-resuming a thread that has a stop reply.
6791 Otherwise, we would end up reporting a stop event for a thread while
6792 it is running on the remote target. */
6793 remote_state
*rs
= get_remote_state ();
6794 for (const auto &stop_reply
: rs
->stop_reply_queue
)
6795 gdb_assert (stop_reply
->ptid
!= tp
->ptid
);
6797 const resumed_pending_vcont_info
&info
6798 = remote_thr
->resumed_pending_vcont_info ();
6800 /* Check if we need to send a specific action for this thread. If not,
6801 it will be included in a wildcard resume instead. */
6802 if (info
.step
|| info
.sig
!= GDB_SIGNAL_0
6803 || !get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6804 vcont_builder
.push_action (tp
->ptid
, info
.step
, info
.sig
);
6806 remote_thr
->set_resumed ();
6809 /* Now check whether we can send any process-wide wildcard. This is
6810 to avoid sending a global wildcard in the case nothing is
6811 supposed to be resumed. */
6812 bool any_process_wildcard
= false;
6814 for (inferior
*inf
: all_non_exited_inferiors (this))
6816 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6818 any_process_wildcard
= true;
6823 if (any_process_wildcard
)
6825 /* If all processes are wildcard-able, then send a single "c"
6826 action, otherwise, send an "all (-1) threads of process"
6827 continue action for each running process, if any. */
6828 if (may_global_wildcard_vcont
)
6830 vcont_builder
.push_action (minus_one_ptid
,
6831 false, GDB_SIGNAL_0
);
6835 for (inferior
*inf
: all_non_exited_inferiors (this))
6837 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6839 vcont_builder
.push_action (ptid_t (inf
->pid
),
6840 false, GDB_SIGNAL_0
);
6846 vcont_builder
.flush ();
6849 /* Implementation of target_has_pending_events. */
6852 remote_target::has_pending_events ()
6854 if (target_can_async_p ())
6856 remote_state
*rs
= get_remote_state ();
6858 if (async_event_handler_marked (rs
->remote_async_inferior_event_token
))
6861 /* Note that BUFCNT can be negative, indicating sticky
6863 if (rs
->remote_desc
->bufcnt
!= 0)
6871 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6872 thread, all threads of a remote process, or all threads of all
6876 remote_target::remote_stop_ns (ptid_t ptid
)
6878 struct remote_state
*rs
= get_remote_state ();
6879 char *p
= rs
->buf
.data ();
6880 char *endp
= p
+ get_remote_packet_size ();
6882 /* If any thread that needs to stop was resumed but pending a vCont
6883 resume, generate a phony stop_reply. However, first check
6884 whether the thread wasn't resumed with a signal. Generating a
6885 phony stop in that case would result in losing the signal. */
6886 bool needs_commit
= false;
6887 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6889 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6891 if (remote_thr
->get_resume_state ()
6892 == resume_state::RESUMED_PENDING_VCONT
)
6894 const resumed_pending_vcont_info
&info
6895 = remote_thr
->resumed_pending_vcont_info ();
6896 if (info
.sig
!= GDB_SIGNAL_0
)
6898 /* This signal must be forwarded to the inferior. We
6899 could commit-resume just this thread, but its simpler
6900 to just commit-resume everything. */
6901 needs_commit
= true;
6910 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6912 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6914 if (remote_thr
->get_resume_state ()
6915 == resume_state::RESUMED_PENDING_VCONT
)
6917 remote_debug_printf ("Enqueueing phony stop reply for thread pending "
6918 "vCont-resume (%d, %ld, %s)", tp
->ptid
.pid(),
6920 pulongest (tp
->ptid
.tid ()));
6922 /* Check that the thread wasn't resumed with a signal.
6923 Generating a phony stop would result in losing the
6925 const resumed_pending_vcont_info
&info
6926 = remote_thr
->resumed_pending_vcont_info ();
6927 gdb_assert (info
.sig
== GDB_SIGNAL_0
);
6929 stop_reply
*sr
= new stop_reply ();
6930 sr
->ptid
= tp
->ptid
;
6932 sr
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
6933 sr
->ws
.value
.sig
= GDB_SIGNAL_0
;
6934 sr
->arch
= tp
->inf
->gdbarch
;
6935 sr
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6936 sr
->watch_data_address
= 0;
6938 this->push_stop_reply (sr
);
6940 /* Pretend that this thread was actually resumed on the
6941 remote target, then stopped. If we leave it in the
6942 RESUMED_PENDING_VCONT state and the commit_resumed
6943 method is called while the stop reply is still in the
6944 queue, we'll end up reporting a stop event to the core
6945 for that thread while it is running on the remote
6946 target... that would be bad. */
6947 remote_thr
->set_resumed ();
6951 /* FIXME: This supports_vCont_probed check is a workaround until
6952 packet_support is per-connection. */
6953 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6954 || !rs
->supports_vCont_probed
)
6955 remote_vcont_probe ();
6957 if (!rs
->supports_vCont
.t
)
6958 error (_("Remote server does not support stopping threads"));
6960 if (ptid
== minus_one_ptid
6961 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6962 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6967 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6970 /* All (-1) threads of process. */
6971 nptid
= ptid_t (ptid
.pid (), -1);
6974 /* Small optimization: if we already have a stop reply for
6975 this thread, no use in telling the stub we want this
6977 if (peek_stop_reply (ptid
))
6983 write_ptid (p
, endp
, nptid
);
6986 /* In non-stop, we get an immediate OK reply. The stop reply will
6987 come in asynchronously by notification. */
6989 getpkt (&rs
->buf
, 0);
6990 if (strcmp (rs
->buf
.data (), "OK") != 0)
6991 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6995 /* All-stop version of target_interrupt. Sends a break or a ^C to
6996 interrupt the remote target. It is undefined which thread of which
6997 process reports the interrupt. */
7000 remote_target::remote_interrupt_as ()
7002 struct remote_state
*rs
= get_remote_state ();
7004 rs
->ctrlc_pending_p
= 1;
7006 /* If the inferior is stopped already, but the core didn't know
7007 about it yet, just ignore the request. The cached wait status
7008 will be collected in remote_wait. */
7009 if (rs
->cached_wait_status
)
7012 /* Send interrupt_sequence to remote target. */
7013 send_interrupt_sequence ();
7016 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
7017 the remote target. It is undefined which thread of which process
7018 reports the interrupt. Throws an error if the packet is not
7019 supported by the server. */
7022 remote_target::remote_interrupt_ns ()
7024 struct remote_state
*rs
= get_remote_state ();
7025 char *p
= rs
->buf
.data ();
7026 char *endp
= p
+ get_remote_packet_size ();
7028 xsnprintf (p
, endp
- p
, "vCtrlC");
7030 /* In non-stop, we get an immediate OK reply. The stop reply will
7031 come in asynchronously by notification. */
7033 getpkt (&rs
->buf
, 0);
7035 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
7039 case PACKET_UNKNOWN
:
7040 error (_("No support for interrupting the remote target."));
7042 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
7046 /* Implement the to_stop function for the remote targets. */
7049 remote_target::stop (ptid_t ptid
)
7051 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7053 if (target_is_non_stop_p ())
7054 remote_stop_ns (ptid
);
7057 /* We don't currently have a way to transparently pause the
7058 remote target in all-stop mode. Interrupt it instead. */
7059 remote_interrupt_as ();
7063 /* Implement the to_interrupt function for the remote targets. */
7066 remote_target::interrupt ()
7068 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7070 if (target_is_non_stop_p ())
7071 remote_interrupt_ns ();
7073 remote_interrupt_as ();
7076 /* Implement the to_pass_ctrlc function for the remote targets. */
7079 remote_target::pass_ctrlc ()
7081 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7083 struct remote_state
*rs
= get_remote_state ();
7085 /* If we're starting up, we're not fully synced yet. Quit
7087 if (rs
->starting_up
)
7089 /* If ^C has already been sent once, offer to disconnect. */
7090 else if (rs
->ctrlc_pending_p
)
7093 target_interrupt ();
7096 /* Ask the user what to do when an interrupt is received. */
7099 remote_target::interrupt_query ()
7101 struct remote_state
*rs
= get_remote_state ();
7103 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
7105 if (query (_("The target is not responding to interrupt requests.\n"
7106 "Stop debugging it? ")))
7108 remote_unpush_target (this);
7109 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
7114 if (query (_("Interrupted while waiting for the program.\n"
7115 "Give up waiting? ")))
7120 /* Enable/disable target terminal ownership. Most targets can use
7121 terminal groups to control terminal ownership. Remote targets are
7122 different in that explicit transfer of ownership to/from GDB/target
7126 remote_target::terminal_inferior ()
7128 /* NOTE: At this point we could also register our selves as the
7129 recipient of all input. Any characters typed could then be
7130 passed on down to the target. */
7134 remote_target::terminal_ours ()
7139 remote_console_output (const char *msg
)
7143 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
7146 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
7150 gdb_stdtarg
->puts (tb
);
7152 gdb_stdtarg
->flush ();
7155 /* Return the length of the stop reply queue. */
7158 remote_target::stop_reply_queue_length ()
7160 remote_state
*rs
= get_remote_state ();
7161 return rs
->stop_reply_queue
.size ();
7165 remote_notif_stop_parse (remote_target
*remote
,
7166 struct notif_client
*self
, const char *buf
,
7167 struct notif_event
*event
)
7169 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
7173 remote_notif_stop_ack (remote_target
*remote
,
7174 struct notif_client
*self
, const char *buf
,
7175 struct notif_event
*event
)
7177 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
7180 putpkt (remote
, self
->ack_command
);
7182 /* Kind can be TARGET_WAITKIND_IGNORE if we have meanwhile discarded
7183 the notification. It was left in the queue because we need to
7184 acknowledge it and pull the rest of the notifications out. */
7185 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7186 remote
->push_stop_reply (stop_reply
);
7190 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
7191 struct notif_client
*self
)
7193 /* We can't get pending events in remote_notif_process for
7194 notification stop, and we have to do this in remote_wait_ns
7195 instead. If we fetch all queued events from stub, remote stub
7196 may exit and we have no chance to process them back in
7198 remote_state
*rs
= remote
->get_remote_state ();
7199 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7203 stop_reply::~stop_reply ()
7205 for (cached_reg_t
®
: regcache
)
7209 static notif_event_up
7210 remote_notif_stop_alloc_reply ()
7212 return notif_event_up (new struct stop_reply ());
7215 /* A client of notification Stop. */
7217 struct notif_client notif_client_stop
=
7221 remote_notif_stop_parse
,
7222 remote_notif_stop_ack
,
7223 remote_notif_stop_can_get_pending_events
,
7224 remote_notif_stop_alloc_reply
,
7228 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
7229 the pid of the process that owns the threads we want to check, or
7230 -1 if we want to check all threads. */
7233 is_pending_fork_parent (const target_waitstatus
*ws
, int event_pid
,
7236 if (ws
->kind
== TARGET_WAITKIND_FORKED
7237 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
7239 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
7246 /* Return the thread's pending status used to determine whether the
7247 thread is a fork parent stopped at a fork event. */
7249 static const target_waitstatus
*
7250 thread_pending_fork_status (struct thread_info
*thread
)
7252 if (thread
->has_pending_waitstatus ())
7253 return &thread
->pending_waitstatus ();
7255 return &thread
->pending_follow
;
7258 /* Determine if THREAD is a pending fork parent thread. */
7261 is_pending_fork_parent_thread (struct thread_info
*thread
)
7263 const target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7266 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7269 /* If CONTEXT contains any fork child threads that have not been
7270 reported yet, remove them from the CONTEXT list. If such a
7271 thread exists it is because we are stopped at a fork catchpoint
7272 and have not yet called follow_fork, which will set up the
7273 host-side data structures for the new process. */
7276 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7279 struct notif_client
*notif
= ¬if_client_stop
;
7281 /* For any threads stopped at a fork event, remove the corresponding
7282 fork child threads from the CONTEXT list. */
7283 for (thread_info
*thread
: all_non_exited_threads (this))
7285 const target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7287 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7288 context
->remove_thread (ws
->value
.related_pid
);
7291 /* Check for any pending fork events (not reported or processed yet)
7292 in process PID and remove those fork child threads from the
7293 CONTEXT list as well. */
7294 remote_notif_get_pending_events (notif
);
7295 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7296 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7297 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7298 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7299 context
->remove_thread (event
->ws
.value
.related_pid
);
7302 /* Check whether any event pending in the vStopped queue would prevent a
7303 global or process wildcard vCont action. Set *may_global_wildcard to
7304 false if we can't do a global wildcard (vCont;c), and clear the event
7305 inferior's may_wildcard_vcont flag if we can't do a process-wide
7306 wildcard resume (vCont;c:pPID.-1). */
7309 remote_target::check_pending_events_prevent_wildcard_vcont
7310 (bool *may_global_wildcard
)
7312 struct notif_client
*notif
= ¬if_client_stop
;
7314 remote_notif_get_pending_events (notif
);
7315 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7317 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7318 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7321 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7322 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7323 *may_global_wildcard
= false;
7325 /* This may be the first time we heard about this process.
7326 Regardless, we must not do a global wildcard resume, otherwise
7327 we'd resume this process too. */
7328 *may_global_wildcard
= false;
7329 if (event
->ptid
!= null_ptid
)
7331 inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7333 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7338 /* Discard all pending stop replies of inferior INF. */
7341 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7343 struct stop_reply
*reply
;
7344 struct remote_state
*rs
= get_remote_state ();
7345 struct remote_notif_state
*rns
= rs
->notif_state
;
7347 /* This function can be notified when an inferior exists. When the
7348 target is not remote, the notification state is NULL. */
7349 if (rs
->remote_desc
== NULL
)
7352 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7354 /* Discard the in-flight notification. */
7355 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7357 /* Leave the notification pending, since the server expects that
7358 we acknowledge it with vStopped. But clear its contents, so
7359 that later on when we acknowledge it, we also discard it. */
7360 reply
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7363 fprintf_unfiltered (gdb_stdlog
,
7364 "discarded in-flight notification\n");
7367 /* Discard the stop replies we have already pulled with
7369 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7370 rs
->stop_reply_queue
.end (),
7371 [=] (const stop_reply_up
&event
)
7373 return event
->ptid
.pid () == inf
->pid
;
7375 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7378 /* Discard the stop replies for RS in stop_reply_queue. */
7381 remote_target::discard_pending_stop_replies_in_queue ()
7383 remote_state
*rs
= get_remote_state ();
7385 /* Discard the stop replies we have already pulled with
7387 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7388 rs
->stop_reply_queue
.end (),
7389 [=] (const stop_reply_up
&event
)
7391 return event
->rs
== rs
;
7393 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7396 /* Remove the first reply in 'stop_reply_queue' which matches
7400 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7402 remote_state
*rs
= get_remote_state ();
7404 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7405 rs
->stop_reply_queue
.end (),
7406 [=] (const stop_reply_up
&event
)
7408 return event
->ptid
.matches (ptid
);
7410 struct stop_reply
*result
;
7411 if (iter
== rs
->stop_reply_queue
.end ())
7415 result
= iter
->release ();
7416 rs
->stop_reply_queue
.erase (iter
);
7420 fprintf_unfiltered (gdb_stdlog
,
7421 "notif: discard queued event: 'Stop' in %s\n",
7422 target_pid_to_str (ptid
).c_str ());
7427 /* Look for a queued stop reply belonging to PTID. If one is found,
7428 remove it from the queue, and return it. Returns NULL if none is
7429 found. If there are still queued events left to process, tell the
7430 event loop to get back to target_wait soon. */
7433 remote_target::queued_stop_reply (ptid_t ptid
)
7435 remote_state
*rs
= get_remote_state ();
7436 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7438 if (!rs
->stop_reply_queue
.empty ())
7440 /* There's still at least an event left. */
7441 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7447 /* Push a fully parsed stop reply in the stop reply queue. Since we
7448 know that we now have at least one queued event left to pass to the
7449 core side, tell the event loop to get back to target_wait soon. */
7452 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7454 remote_state
*rs
= get_remote_state ();
7455 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7458 fprintf_unfiltered (gdb_stdlog
,
7459 "notif: push 'Stop' %s to queue %d\n",
7460 target_pid_to_str (new_event
->ptid
).c_str (),
7461 int (rs
->stop_reply_queue
.size ()));
7463 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7466 /* Returns true if we have a stop reply for PTID. */
7469 remote_target::peek_stop_reply (ptid_t ptid
)
7471 remote_state
*rs
= get_remote_state ();
7472 for (auto &event
: rs
->stop_reply_queue
)
7473 if (ptid
== event
->ptid
7474 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7479 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7480 starting with P and ending with PEND matches PREFIX. */
7483 strprefix (const char *p
, const char *pend
, const char *prefix
)
7485 for ( ; p
< pend
; p
++, prefix
++)
7488 return *prefix
== '\0';
7491 /* Parse the stop reply in BUF. Either the function succeeds, and the
7492 result is stored in EVENT, or throws an error. */
7495 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7497 remote_arch_state
*rsa
= NULL
;
7502 event
->ptid
= null_ptid
;
7503 event
->rs
= get_remote_state ();
7504 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7505 event
->ws
.value
.integer
= 0;
7506 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7507 event
->regcache
.clear ();
7512 case 'T': /* Status with PC, SP, FP, ... */
7513 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7514 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7516 n... = register number
7517 r... = register contents
7520 p
= &buf
[3]; /* after Txx */
7526 p1
= strchr (p
, ':');
7528 error (_("Malformed packet(a) (missing colon): %s\n\
7532 error (_("Malformed packet(a) (missing register number): %s\n\
7536 /* Some "registers" are actually extended stop information.
7537 Note if you're adding a new entry here: GDB 7.9 and
7538 earlier assume that all register "numbers" that start
7539 with an hex digit are real register numbers. Make sure
7540 the server only sends such a packet if it knows the
7541 client understands it. */
7543 if (strprefix (p
, p1
, "thread"))
7544 event
->ptid
= read_ptid (++p1
, &p
);
7545 else if (strprefix (p
, p1
, "syscall_entry"))
7549 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7550 p
= unpack_varlen_hex (++p1
, &sysno
);
7551 event
->ws
.value
.syscall_number
= (int) sysno
;
7553 else if (strprefix (p
, p1
, "syscall_return"))
7557 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7558 p
= unpack_varlen_hex (++p1
, &sysno
);
7559 event
->ws
.value
.syscall_number
= (int) sysno
;
7561 else if (strprefix (p
, p1
, "watch")
7562 || strprefix (p
, p1
, "rwatch")
7563 || strprefix (p
, p1
, "awatch"))
7565 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7566 p
= unpack_varlen_hex (++p1
, &addr
);
7567 event
->watch_data_address
= (CORE_ADDR
) addr
;
7569 else if (strprefix (p
, p1
, "swbreak"))
7571 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7573 /* Make sure the stub doesn't forget to indicate support
7575 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7576 error (_("Unexpected swbreak stop reason"));
7578 /* The value part is documented as "must be empty",
7579 though we ignore it, in case we ever decide to make
7580 use of it in a backward compatible way. */
7581 p
= strchrnul (p1
+ 1, ';');
7583 else if (strprefix (p
, p1
, "hwbreak"))
7585 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7587 /* Make sure the stub doesn't forget to indicate support
7589 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7590 error (_("Unexpected hwbreak stop reason"));
7593 p
= strchrnul (p1
+ 1, ';');
7595 else if (strprefix (p
, p1
, "library"))
7597 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7598 p
= strchrnul (p1
+ 1, ';');
7600 else if (strprefix (p
, p1
, "replaylog"))
7602 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7603 /* p1 will indicate "begin" or "end", but it makes
7604 no difference for now, so ignore it. */
7605 p
= strchrnul (p1
+ 1, ';');
7607 else if (strprefix (p
, p1
, "core"))
7611 p
= unpack_varlen_hex (++p1
, &c
);
7614 else if (strprefix (p
, p1
, "fork"))
7616 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7617 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7619 else if (strprefix (p
, p1
, "vfork"))
7621 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7622 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7624 else if (strprefix (p
, p1
, "vforkdone"))
7626 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7627 p
= strchrnul (p1
+ 1, ';');
7629 else if (strprefix (p
, p1
, "exec"))
7634 /* Determine the length of the execd pathname. */
7635 p
= unpack_varlen_hex (++p1
, &ignored
);
7636 pathlen
= (p
- p1
) / 2;
7638 /* Save the pathname for event reporting and for
7639 the next run command. */
7640 gdb::unique_xmalloc_ptr
<char[]> pathname
7641 ((char *) xmalloc (pathlen
+ 1));
7642 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7643 pathname
[pathlen
] = '\0';
7645 /* This is freed during event handling. */
7646 event
->ws
.value
.execd_pathname
= pathname
.release ();
7647 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7649 /* Skip the registers included in this packet, since
7650 they may be for an architecture different from the
7651 one used by the original program. */
7654 else if (strprefix (p
, p1
, "create"))
7656 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7657 p
= strchrnul (p1
+ 1, ';');
7666 p
= strchrnul (p1
+ 1, ';');
7671 /* Maybe a real ``P'' register number. */
7672 p_temp
= unpack_varlen_hex (p
, &pnum
);
7673 /* If the first invalid character is the colon, we got a
7674 register number. Otherwise, it's an unknown stop
7678 /* If we haven't parsed the event's thread yet, find
7679 it now, in order to find the architecture of the
7680 reported expedited registers. */
7681 if (event
->ptid
== null_ptid
)
7683 /* If there is no thread-id information then leave
7684 the event->ptid as null_ptid. Later in
7685 process_stop_reply we will pick a suitable
7687 const char *thr
= strstr (p1
+ 1, ";thread:");
7689 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7696 = (event
->ptid
== null_ptid
7698 : find_inferior_ptid (this, event
->ptid
));
7699 /* If this is the first time we learn anything
7700 about this process, skip the registers
7701 included in this packet, since we don't yet
7702 know which architecture to use to parse them.
7703 We'll determine the architecture later when
7704 we process the stop reply and retrieve the
7705 target description, via
7706 remote_notice_new_inferior ->
7707 post_create_inferior. */
7710 p
= strchrnul (p1
+ 1, ';');
7715 event
->arch
= inf
->gdbarch
;
7716 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7720 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7721 cached_reg_t cached_reg
;
7724 error (_("Remote sent bad register number %s: %s\n\
7726 hex_string (pnum
), p
, buf
);
7728 cached_reg
.num
= reg
->regnum
;
7729 cached_reg
.data
= (gdb_byte
*)
7730 xmalloc (register_size (event
->arch
, reg
->regnum
));
7733 fieldsize
= hex2bin (p
, cached_reg
.data
,
7734 register_size (event
->arch
, reg
->regnum
));
7736 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7737 warning (_("Remote reply is too short: %s"), buf
);
7739 event
->regcache
.push_back (cached_reg
);
7743 /* Not a number. Silently skip unknown optional
7745 p
= strchrnul (p1
+ 1, ';');
7750 error (_("Remote register badly formatted: %s\nhere: %s"),
7755 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7759 case 'S': /* Old style status, just signal only. */
7763 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7764 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7765 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7766 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7768 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7771 case 'w': /* Thread exited. */
7775 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7776 p
= unpack_varlen_hex (&buf
[1], &value
);
7777 event
->ws
.value
.integer
= value
;
7779 error (_("stop reply packet badly formatted: %s"), buf
);
7780 event
->ptid
= read_ptid (++p
, NULL
);
7783 case 'W': /* Target exited. */
7788 /* GDB used to accept only 2 hex chars here. Stubs should
7789 only send more if they detect GDB supports multi-process
7791 p
= unpack_varlen_hex (&buf
[1], &value
);
7795 /* The remote process exited. */
7796 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7797 event
->ws
.value
.integer
= value
;
7801 /* The remote process exited with a signal. */
7802 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7803 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7804 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7806 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7809 /* If no process is specified, return null_ptid, and let the
7810 caller figure out the right process to use. */
7820 else if (startswith (p
, "process:"))
7824 p
+= sizeof ("process:") - 1;
7825 unpack_varlen_hex (p
, &upid
);
7829 error (_("unknown stop reply packet: %s"), buf
);
7832 error (_("unknown stop reply packet: %s"), buf
);
7833 event
->ptid
= ptid_t (pid
);
7837 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7838 event
->ptid
= minus_one_ptid
;
7843 /* When the stub wants to tell GDB about a new notification reply, it
7844 sends a notification (%Stop, for example). Those can come it at
7845 any time, hence, we have to make sure that any pending
7846 putpkt/getpkt sequence we're making is finished, before querying
7847 the stub for more events with the corresponding ack command
7848 (vStopped, for example). E.g., if we started a vStopped sequence
7849 immediately upon receiving the notification, something like this
7857 1.6) <-- (registers reply to step #1.3)
7859 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7862 To solve this, whenever we parse a %Stop notification successfully,
7863 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7864 doing whatever we were doing:
7870 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7871 2.5) <-- (registers reply to step #2.3)
7873 Eventually after step #2.5, we return to the event loop, which
7874 notices there's an event on the
7875 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7876 associated callback --- the function below. At this point, we're
7877 always safe to start a vStopped sequence. :
7880 2.7) <-- T05 thread:2
7886 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7888 struct remote_state
*rs
= get_remote_state ();
7890 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7893 fprintf_unfiltered (gdb_stdlog
,
7894 "notif: process: '%s' ack pending event\n",
7898 nc
->ack (this, nc
, rs
->buf
.data (),
7899 rs
->notif_state
->pending_event
[nc
->id
]);
7900 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7904 getpkt (&rs
->buf
, 0);
7905 if (strcmp (rs
->buf
.data (), "OK") == 0)
7908 remote_notif_ack (this, nc
, rs
->buf
.data ());
7914 fprintf_unfiltered (gdb_stdlog
,
7915 "notif: process: '%s' no pending reply\n",
7920 /* Wrapper around remote_target::remote_notif_get_pending_events to
7921 avoid having to export the whole remote_target class. */
7924 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7926 remote
->remote_notif_get_pending_events (nc
);
7929 /* Called from process_stop_reply when the stop packet we are responding
7930 to didn't include a process-id or thread-id. STATUS is the stop event
7931 we are responding to.
7933 It is the task of this function to select a suitable thread (or process)
7934 and return its ptid, this is the thread (or process) we will assume the
7935 stop event came from.
7937 In some cases there isn't really any choice about which thread (or
7938 process) is selected, a basic remote with a single process containing a
7939 single thread might choose not to send any process-id or thread-id in
7940 its stop packets, this function will select and return the one and only
7943 However, if a target supports multiple threads (or processes) and still
7944 doesn't include a thread-id (or process-id) in its stop packet then
7945 first, this is a badly behaving target, and second, we're going to have
7946 to select a thread (or process) at random and use that. This function
7947 will print a warning to the user if it detects that there is the
7948 possibility that GDB is guessing which thread (or process) to
7951 Note that this is called before GDB fetches the updated thread list from the
7952 target. So it's possible for the stop reply to be ambiguous and for GDB to
7953 not realize it. For example, if there's initially one thread, the target
7954 spawns a second thread, and then sends a stop reply without an id that
7955 concerns the first thread. GDB will assume the stop reply is about the
7956 first thread - the only thread it knows about - without printing a warning.
7957 Anyway, if the remote meant for the stop reply to be about the second thread,
7958 then it would be really broken, because GDB doesn't know about that thread
7962 remote_target::select_thread_for_ambiguous_stop_reply
7963 (const struct target_waitstatus
*status
)
7965 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7967 /* Some stop events apply to all threads in an inferior, while others
7968 only apply to a single thread. */
7969 bool process_wide_stop
7970 = (status
->kind
== TARGET_WAITKIND_EXITED
7971 || status
->kind
== TARGET_WAITKIND_SIGNALLED
);
7973 remote_debug_printf ("process_wide_stop = %d", process_wide_stop
);
7975 thread_info
*first_resumed_thread
= nullptr;
7976 bool ambiguous
= false;
7978 /* Consider all non-exited threads of the target, find the first resumed
7980 for (thread_info
*thr
: all_non_exited_threads (this))
7982 remote_thread_info
*remote_thr
= get_remote_thread_info (thr
);
7984 if (remote_thr
->get_resume_state () != resume_state::RESUMED
)
7987 if (first_resumed_thread
== nullptr)
7988 first_resumed_thread
= thr
;
7989 else if (!process_wide_stop
7990 || first_resumed_thread
->ptid
.pid () != thr
->ptid
.pid ())
7994 remote_debug_printf ("first resumed thread is %s",
7995 pid_to_str (first_resumed_thread
->ptid
).c_str ());
7996 remote_debug_printf ("is this guess ambiguous? = %d", ambiguous
);
7998 gdb_assert (first_resumed_thread
!= nullptr);
8000 /* Warn if the remote target is sending ambiguous stop replies. */
8003 static bool warned
= false;
8007 /* If you are seeing this warning then the remote target has
8008 stopped without specifying a thread-id, but the target
8009 does have multiple threads (or inferiors), and so GDB is
8010 having to guess which thread stopped.
8012 Examples of what might cause this are the target sending
8013 and 'S' stop packet, or a 'T' stop packet and not
8014 including a thread-id.
8016 Additionally, the target might send a 'W' or 'X packet
8017 without including a process-id, when the target has
8018 multiple running inferiors. */
8019 if (process_wide_stop
)
8020 warning (_("multi-inferior target stopped without "
8021 "sending a process-id, using first "
8022 "non-exited inferior"));
8024 warning (_("multi-threaded target stopped without "
8025 "sending a thread-id, using first "
8026 "non-exited thread"));
8031 /* If this is a stop for all threads then don't use a particular threads
8032 ptid, instead create a new ptid where only the pid field is set. */
8033 if (process_wide_stop
)
8034 return ptid_t (first_resumed_thread
->ptid
.pid ());
8036 return first_resumed_thread
->ptid
;
8039 /* Called when it is decided that STOP_REPLY holds the info of the
8040 event that is to be returned to the core. This function always
8041 destroys STOP_REPLY. */
8044 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
8045 struct target_waitstatus
*status
)
8047 *status
= stop_reply
->ws
;
8048 ptid_t ptid
= stop_reply
->ptid
;
8050 /* If no thread/process was reported by the stub then select a suitable
8052 if (ptid
== null_ptid
)
8053 ptid
= select_thread_for_ambiguous_stop_reply (status
);
8054 gdb_assert (ptid
!= null_ptid
);
8056 if (status
->kind
!= TARGET_WAITKIND_EXITED
8057 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
8058 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
8060 /* Expedited registers. */
8061 if (!stop_reply
->regcache
.empty ())
8063 struct regcache
*regcache
8064 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
8066 for (cached_reg_t
®
: stop_reply
->regcache
)
8068 regcache
->raw_supply (reg
.num
, reg
.data
);
8072 stop_reply
->regcache
.clear ();
8075 remote_notice_new_inferior (ptid
, false);
8076 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
8077 remote_thr
->core
= stop_reply
->core
;
8078 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
8079 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
8081 if (target_is_non_stop_p ())
8083 /* If the target works in non-stop mode, a stop-reply indicates that
8084 only this thread stopped. */
8085 remote_thr
->set_not_resumed ();
8089 /* If the target works in all-stop mode, a stop-reply indicates that
8090 all the target's threads stopped. */
8091 for (thread_info
*tp
: all_non_exited_threads (this))
8092 get_remote_thread_info (tp
)->set_not_resumed ();
8100 /* The non-stop mode version of target_wait. */
8103 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
8104 target_wait_flags options
)
8106 struct remote_state
*rs
= get_remote_state ();
8107 struct stop_reply
*stop_reply
;
8111 /* If in non-stop mode, get out of getpkt even if a
8112 notification is received. */
8114 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
8117 if (ret
!= -1 && !is_notif
)
8120 case 'E': /* Error of some sort. */
8121 /* We're out of sync with the target now. Did it continue
8122 or not? We can't tell which thread it was in non-stop,
8123 so just ignore this. */
8124 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
8126 case 'O': /* Console output. */
8127 remote_console_output (&rs
->buf
[1]);
8130 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
8134 /* Acknowledge a pending stop reply that may have arrived in the
8136 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
8137 remote_notif_get_pending_events (¬if_client_stop
);
8139 /* If indeed we noticed a stop reply, we're done. */
8140 stop_reply
= queued_stop_reply (ptid
);
8141 if (stop_reply
!= NULL
)
8142 return process_stop_reply (stop_reply
, status
);
8144 /* Still no event. If we're just polling for an event, then
8145 return to the event loop. */
8146 if (options
& TARGET_WNOHANG
)
8148 status
->kind
= TARGET_WAITKIND_IGNORE
;
8149 return minus_one_ptid
;
8152 /* Otherwise do a blocking wait. */
8153 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
8157 /* Return the first resumed thread. */
8160 first_remote_resumed_thread (remote_target
*target
)
8162 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
8168 /* Wait until the remote machine stops, then return, storing status in
8169 STATUS just as `wait' would. */
8172 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
,
8173 target_wait_flags options
)
8175 struct remote_state
*rs
= get_remote_state ();
8176 ptid_t event_ptid
= null_ptid
;
8178 struct stop_reply
*stop_reply
;
8182 status
->kind
= TARGET_WAITKIND_IGNORE
;
8183 status
->value
.integer
= 0;
8185 stop_reply
= queued_stop_reply (ptid
);
8186 if (stop_reply
!= NULL
)
8187 return process_stop_reply (stop_reply
, status
);
8189 if (rs
->cached_wait_status
)
8190 /* Use the cached wait status, but only once. */
8191 rs
->cached_wait_status
= 0;
8196 int forever
= ((options
& TARGET_WNOHANG
) == 0
8197 && rs
->wait_forever_enabled_p
);
8199 if (!rs
->waiting_for_stop_reply
)
8201 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
8202 return minus_one_ptid
;
8205 /* FIXME: cagney/1999-09-27: If we're in async mode we should
8206 _never_ wait for ever -> test on target_is_async_p().
8207 However, before we do that we need to ensure that the caller
8208 knows how to take the target into/out of async mode. */
8209 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
8211 /* GDB gets a notification. Return to core as this event is
8213 if (ret
!= -1 && is_notif
)
8214 return minus_one_ptid
;
8216 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
8217 return minus_one_ptid
;
8220 buf
= rs
->buf
.data ();
8222 /* Assume that the target has acknowledged Ctrl-C unless we receive
8223 an 'F' or 'O' packet. */
8224 if (buf
[0] != 'F' && buf
[0] != 'O')
8225 rs
->ctrlc_pending_p
= 0;
8229 case 'E': /* Error of some sort. */
8230 /* We're out of sync with the target now. Did it continue or
8231 not? Not is more likely, so report a stop. */
8232 rs
->waiting_for_stop_reply
= 0;
8234 warning (_("Remote failure reply: %s"), buf
);
8235 status
->kind
= TARGET_WAITKIND_STOPPED
;
8236 status
->value
.sig
= GDB_SIGNAL_0
;
8238 case 'F': /* File-I/O request. */
8239 /* GDB may access the inferior memory while handling the File-I/O
8240 request, but we don't want GDB accessing memory while waiting
8241 for a stop reply. See the comments in putpkt_binary. Set
8242 waiting_for_stop_reply to 0 temporarily. */
8243 rs
->waiting_for_stop_reply
= 0;
8244 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
8245 rs
->ctrlc_pending_p
= 0;
8246 /* GDB handled the File-I/O request, and the target is running
8247 again. Keep waiting for events. */
8248 rs
->waiting_for_stop_reply
= 1;
8250 case 'N': case 'T': case 'S': case 'X': case 'W':
8252 /* There is a stop reply to handle. */
8253 rs
->waiting_for_stop_reply
= 0;
8256 = (struct stop_reply
*) remote_notif_parse (this,
8260 event_ptid
= process_stop_reply (stop_reply
, status
);
8263 case 'O': /* Console output. */
8264 remote_console_output (buf
+ 1);
8267 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
8269 /* Zero length reply means that we tried 'S' or 'C' and the
8270 remote system doesn't support it. */
8271 target_terminal::ours_for_output ();
8273 ("Can't send signals to this remote system. %s not sent.\n",
8274 gdb_signal_to_name (rs
->last_sent_signal
));
8275 rs
->last_sent_signal
= GDB_SIGNAL_0
;
8276 target_terminal::inferior ();
8278 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
8284 warning (_("Invalid remote reply: %s"), buf
);
8288 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
8289 return minus_one_ptid
;
8290 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
8292 /* Nothing interesting happened. If we're doing a non-blocking
8293 poll, we're done. Otherwise, go back to waiting. */
8294 if (options
& TARGET_WNOHANG
)
8295 return minus_one_ptid
;
8299 else if (status
->kind
!= TARGET_WAITKIND_EXITED
8300 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
8302 if (event_ptid
!= null_ptid
)
8303 record_currthread (rs
, event_ptid
);
8305 event_ptid
= first_remote_resumed_thread (this);
8309 /* A process exit. Invalidate our notion of current thread. */
8310 record_currthread (rs
, minus_one_ptid
);
8311 /* It's possible that the packet did not include a pid. */
8312 if (event_ptid
== null_ptid
)
8313 event_ptid
= first_remote_resumed_thread (this);
8314 /* EVENT_PTID could still be NULL_PTID. Double-check. */
8315 if (event_ptid
== null_ptid
)
8316 event_ptid
= magic_null_ptid
;
8322 /* Wait until the remote machine stops, then return, storing status in
8323 STATUS just as `wait' would. */
8326 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
,
8327 target_wait_flags options
)
8329 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
8331 remote_state
*rs
= get_remote_state ();
8333 /* Start by clearing the flag that asks for our wait method to be called,
8334 we'll mark it again at the end if needed. */
8335 if (target_is_async_p ())
8336 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
8340 if (target_is_non_stop_p ())
8341 event_ptid
= wait_ns (ptid
, status
, options
);
8343 event_ptid
= wait_as (ptid
, status
, options
);
8345 if (target_is_async_p ())
8347 /* If there are events left in the queue, or unacknowledged
8348 notifications, then tell the event loop to call us again. */
8349 if (!rs
->stop_reply_queue
.empty ()
8350 || rs
->notif_state
->pending_event
[notif_client_stop
.id
] != nullptr)
8351 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
8357 /* Fetch a single register using a 'p' packet. */
8360 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8363 struct gdbarch
*gdbarch
= regcache
->arch ();
8364 struct remote_state
*rs
= get_remote_state ();
8366 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8369 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8372 if (reg
->pnum
== -1)
8375 p
= rs
->buf
.data ();
8377 p
+= hexnumstr (p
, reg
->pnum
);
8380 getpkt (&rs
->buf
, 0);
8382 buf
= rs
->buf
.data ();
8384 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8388 case PACKET_UNKNOWN
:
8391 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8392 gdbarch_register_name (regcache
->arch (),
8397 /* If this register is unfetchable, tell the regcache. */
8400 regcache
->raw_supply (reg
->regnum
, NULL
);
8404 /* Otherwise, parse and supply the value. */
8410 error (_("fetch_register_using_p: early buf termination"));
8412 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8415 regcache
->raw_supply (reg
->regnum
, regp
);
8419 /* Fetch the registers included in the target's 'g' packet. */
8422 remote_target::send_g_packet ()
8424 struct remote_state
*rs
= get_remote_state ();
8427 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8429 getpkt (&rs
->buf
, 0);
8430 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8431 error (_("Could not read registers; remote failure reply '%s'"),
8434 /* We can get out of synch in various cases. If the first character
8435 in the buffer is not a hex character, assume that has happened
8436 and try to fetch another packet to read. */
8437 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8438 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8439 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8440 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8442 remote_debug_printf ("Bad register packet; fetching a new packet");
8443 getpkt (&rs
->buf
, 0);
8446 buf_len
= strlen (rs
->buf
.data ());
8448 /* Sanity check the received packet. */
8449 if (buf_len
% 2 != 0)
8450 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8456 remote_target::process_g_packet (struct regcache
*regcache
)
8458 struct gdbarch
*gdbarch
= regcache
->arch ();
8459 struct remote_state
*rs
= get_remote_state ();
8460 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8465 buf_len
= strlen (rs
->buf
.data ());
8467 /* Further sanity checks, with knowledge of the architecture. */
8468 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8469 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8471 rsa
->sizeof_g_packet
, buf_len
/ 2,
8474 /* Save the size of the packet sent to us by the target. It is used
8475 as a heuristic when determining the max size of packets that the
8476 target can safely receive. */
8477 if (rsa
->actual_register_packet_size
== 0)
8478 rsa
->actual_register_packet_size
= buf_len
;
8480 /* If this is smaller than we guessed the 'g' packet would be,
8481 update our records. A 'g' reply that doesn't include a register's
8482 value implies either that the register is not available, or that
8483 the 'p' packet must be used. */
8484 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8486 long sizeof_g_packet
= buf_len
/ 2;
8488 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8490 long offset
= rsa
->regs
[i
].offset
;
8491 long reg_size
= register_size (gdbarch
, i
);
8493 if (rsa
->regs
[i
].pnum
== -1)
8496 if (offset
>= sizeof_g_packet
)
8497 rsa
->regs
[i
].in_g_packet
= 0;
8498 else if (offset
+ reg_size
> sizeof_g_packet
)
8499 error (_("Truncated register %d in remote 'g' packet"), i
);
8501 rsa
->regs
[i
].in_g_packet
= 1;
8504 /* Looks valid enough, we can assume this is the correct length
8505 for a 'g' packet. It's important not to adjust
8506 rsa->sizeof_g_packet if we have truncated registers otherwise
8507 this "if" won't be run the next time the method is called
8508 with a packet of the same size and one of the internal errors
8509 below will trigger instead. */
8510 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8513 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8515 /* Unimplemented registers read as all bits zero. */
8516 memset (regs
, 0, rsa
->sizeof_g_packet
);
8518 /* Reply describes registers byte by byte, each byte encoded as two
8519 hex characters. Suck them all up, then supply them to the
8520 register cacheing/storage mechanism. */
8522 p
= rs
->buf
.data ();
8523 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8525 if (p
[0] == 0 || p
[1] == 0)
8526 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8527 internal_error (__FILE__
, __LINE__
,
8528 _("unexpected end of 'g' packet reply"));
8530 if (p
[0] == 'x' && p
[1] == 'x')
8531 regs
[i
] = 0; /* 'x' */
8533 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8537 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8539 struct packet_reg
*r
= &rsa
->regs
[i
];
8540 long reg_size
= register_size (gdbarch
, i
);
8544 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8545 /* This shouldn't happen - we adjusted in_g_packet above. */
8546 internal_error (__FILE__
, __LINE__
,
8547 _("unexpected end of 'g' packet reply"));
8548 else if (rs
->buf
[r
->offset
* 2] == 'x')
8550 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8551 /* The register isn't available, mark it as such (at
8552 the same time setting the value to zero). */
8553 regcache
->raw_supply (r
->regnum
, NULL
);
8556 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8562 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8565 process_g_packet (regcache
);
8568 /* Make the remote selected traceframe match GDB's selected
8572 remote_target::set_remote_traceframe ()
8575 struct remote_state
*rs
= get_remote_state ();
8577 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8580 /* Avoid recursion, remote_trace_find calls us again. */
8581 rs
->remote_traceframe_number
= get_traceframe_number ();
8583 newnum
= target_trace_find (tfind_number
,
8584 get_traceframe_number (), 0, 0, NULL
);
8586 /* Should not happen. If it does, all bets are off. */
8587 if (newnum
!= get_traceframe_number ())
8588 warning (_("could not set remote traceframe"));
8592 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8594 struct gdbarch
*gdbarch
= regcache
->arch ();
8595 struct remote_state
*rs
= get_remote_state ();
8596 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8599 set_remote_traceframe ();
8600 set_general_thread (regcache
->ptid ());
8604 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8606 gdb_assert (reg
!= NULL
);
8608 /* If this register might be in the 'g' packet, try that first -
8609 we are likely to read more than one register. If this is the
8610 first 'g' packet, we might be overly optimistic about its
8611 contents, so fall back to 'p'. */
8612 if (reg
->in_g_packet
)
8614 fetch_registers_using_g (regcache
);
8615 if (reg
->in_g_packet
)
8619 if (fetch_register_using_p (regcache
, reg
))
8622 /* This register is not available. */
8623 regcache
->raw_supply (reg
->regnum
, NULL
);
8628 fetch_registers_using_g (regcache
);
8630 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8631 if (!rsa
->regs
[i
].in_g_packet
)
8632 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8634 /* This register is not available. */
8635 regcache
->raw_supply (i
, NULL
);
8639 /* Prepare to store registers. Since we may send them all (using a
8640 'G' request), we have to read out the ones we don't want to change
8644 remote_target::prepare_to_store (struct regcache
*regcache
)
8646 struct remote_state
*rs
= get_remote_state ();
8647 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8650 /* Make sure the entire registers array is valid. */
8651 switch (packet_support (PACKET_P
))
8653 case PACKET_DISABLE
:
8654 case PACKET_SUPPORT_UNKNOWN
:
8655 /* Make sure all the necessary registers are cached. */
8656 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8657 if (rsa
->regs
[i
].in_g_packet
)
8658 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8665 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8666 packet was not recognized. */
8669 remote_target::store_register_using_P (const struct regcache
*regcache
,
8672 struct gdbarch
*gdbarch
= regcache
->arch ();
8673 struct remote_state
*rs
= get_remote_state ();
8674 /* Try storing a single register. */
8675 char *buf
= rs
->buf
.data ();
8676 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8679 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8682 if (reg
->pnum
== -1)
8685 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8686 p
= buf
+ strlen (buf
);
8687 regcache
->raw_collect (reg
->regnum
, regp
);
8688 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8690 getpkt (&rs
->buf
, 0);
8692 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8697 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8698 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8699 case PACKET_UNKNOWN
:
8702 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8706 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8707 contents of the register cache buffer. FIXME: ignores errors. */
8710 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8712 struct remote_state
*rs
= get_remote_state ();
8713 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8717 /* Extract all the registers in the regcache copying them into a
8722 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8723 memset (regs
, 0, rsa
->sizeof_g_packet
);
8724 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8726 struct packet_reg
*r
= &rsa
->regs
[i
];
8729 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8733 /* Command describes registers byte by byte,
8734 each byte encoded as two hex characters. */
8735 p
= rs
->buf
.data ();
8737 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8739 getpkt (&rs
->buf
, 0);
8740 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8741 error (_("Could not write registers; remote failure reply '%s'"),
8745 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8746 of the register cache buffer. FIXME: ignores errors. */
8749 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8751 struct gdbarch
*gdbarch
= regcache
->arch ();
8752 struct remote_state
*rs
= get_remote_state ();
8753 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8756 set_remote_traceframe ();
8757 set_general_thread (regcache
->ptid ());
8761 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8763 gdb_assert (reg
!= NULL
);
8765 /* Always prefer to store registers using the 'P' packet if
8766 possible; we often change only a small number of registers.
8767 Sometimes we change a larger number; we'd need help from a
8768 higher layer to know to use 'G'. */
8769 if (store_register_using_P (regcache
, reg
))
8772 /* For now, don't complain if we have no way to write the
8773 register. GDB loses track of unavailable registers too
8774 easily. Some day, this may be an error. We don't have
8775 any way to read the register, either... */
8776 if (!reg
->in_g_packet
)
8779 store_registers_using_G (regcache
);
8783 store_registers_using_G (regcache
);
8785 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8786 if (!rsa
->regs
[i
].in_g_packet
)
8787 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8788 /* See above for why we do not issue an error here. */
8793 /* Return the number of hex digits in num. */
8796 hexnumlen (ULONGEST num
)
8800 for (i
= 0; num
!= 0; i
++)
8803 return std::max (i
, 1);
8806 /* Set BUF to the minimum number of hex digits representing NUM. */
8809 hexnumstr (char *buf
, ULONGEST num
)
8811 int len
= hexnumlen (num
);
8813 return hexnumnstr (buf
, num
, len
);
8817 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8820 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8826 for (i
= width
- 1; i
>= 0; i
--)
8828 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8835 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8838 remote_address_masked (CORE_ADDR addr
)
8840 unsigned int address_size
= remote_address_size
;
8842 /* If "remoteaddresssize" was not set, default to target address size. */
8844 address_size
= gdbarch_addr_bit (target_gdbarch ());
8846 if (address_size
> 0
8847 && address_size
< (sizeof (ULONGEST
) * 8))
8849 /* Only create a mask when that mask can safely be constructed
8850 in a ULONGEST variable. */
8853 mask
= (mask
<< address_size
) - 1;
8859 /* Determine whether the remote target supports binary downloading.
8860 This is accomplished by sending a no-op memory write of zero length
8861 to the target at the specified address. It does not suffice to send
8862 the whole packet, since many stubs strip the eighth bit and
8863 subsequently compute a wrong checksum, which causes real havoc with
8866 NOTE: This can still lose if the serial line is not eight-bit
8867 clean. In cases like this, the user should clear "remote
8871 remote_target::check_binary_download (CORE_ADDR addr
)
8873 struct remote_state
*rs
= get_remote_state ();
8875 switch (packet_support (PACKET_X
))
8877 case PACKET_DISABLE
:
8881 case PACKET_SUPPORT_UNKNOWN
:
8885 p
= rs
->buf
.data ();
8887 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8889 p
+= hexnumstr (p
, (ULONGEST
) 0);
8893 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8894 getpkt (&rs
->buf
, 0);
8896 if (rs
->buf
[0] == '\0')
8898 remote_debug_printf ("binary downloading NOT supported by target");
8899 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8903 remote_debug_printf ("binary downloading supported by target");
8904 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8911 /* Helper function to resize the payload in order to try to get a good
8912 alignment. We try to write an amount of data such that the next write will
8913 start on an address aligned on REMOTE_ALIGN_WRITES. */
8916 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8918 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8921 /* Write memory data directly to the remote machine.
8922 This does not inform the data cache; the data cache uses this.
8923 HEADER is the starting part of the packet.
8924 MEMADDR is the address in the remote memory space.
8925 MYADDR is the address of the buffer in our space.
8926 LEN_UNITS is the number of addressable units to write.
8927 UNIT_SIZE is the length in bytes of an addressable unit.
8928 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8929 should send data as binary ('X'), or hex-encoded ('M').
8931 The function creates packet of the form
8932 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8934 where encoding of <DATA> is terminated by PACKET_FORMAT.
8936 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8939 Return the transferred status, error or OK (an
8940 'enum target_xfer_status' value). Save the number of addressable units
8941 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8943 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8944 exchange between gdb and the stub could look like (?? in place of the
8950 -> $M1000,3:eeeeffffeeee#??
8954 <- eeeeffffeeeedddd */
8957 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8958 const gdb_byte
*myaddr
,
8961 ULONGEST
*xfered_len_units
,
8962 char packet_format
, int use_length
)
8964 struct remote_state
*rs
= get_remote_state ();
8970 int payload_capacity_bytes
;
8971 int payload_length_bytes
;
8973 if (packet_format
!= 'X' && packet_format
!= 'M')
8974 internal_error (__FILE__
, __LINE__
,
8975 _("remote_write_bytes_aux: bad packet format"));
8978 return TARGET_XFER_EOF
;
8980 payload_capacity_bytes
= get_memory_write_packet_size ();
8982 /* The packet buffer will be large enough for the payload;
8983 get_memory_packet_size ensures this. */
8986 /* Compute the size of the actual payload by subtracting out the
8987 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8989 payload_capacity_bytes
-= strlen ("$,:#NN");
8991 /* The comma won't be used. */
8992 payload_capacity_bytes
+= 1;
8993 payload_capacity_bytes
-= strlen (header
);
8994 payload_capacity_bytes
-= hexnumlen (memaddr
);
8996 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8998 strcat (rs
->buf
.data (), header
);
8999 p
= rs
->buf
.data () + strlen (header
);
9001 /* Compute a best guess of the number of bytes actually transfered. */
9002 if (packet_format
== 'X')
9004 /* Best guess at number of bytes that will fit. */
9005 todo_units
= std::min (len_units
,
9006 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
9008 payload_capacity_bytes
-= hexnumlen (todo_units
);
9009 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
9013 /* Number of bytes that will fit. */
9015 = std::min (len_units
,
9016 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
9018 payload_capacity_bytes
-= hexnumlen (todo_units
);
9019 todo_units
= std::min (todo_units
,
9020 (payload_capacity_bytes
/ unit_size
) / 2);
9023 if (todo_units
<= 0)
9024 internal_error (__FILE__
, __LINE__
,
9025 _("minimum packet size too small to write data"));
9027 /* If we already need another packet, then try to align the end
9028 of this packet to a useful boundary. */
9029 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
9030 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
9032 /* Append "<memaddr>". */
9033 memaddr
= remote_address_masked (memaddr
);
9034 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9041 /* Append the length and retain its location and size. It may need to be
9042 adjusted once the packet body has been created. */
9044 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
9052 /* Append the packet body. */
9053 if (packet_format
== 'X')
9055 /* Binary mode. Send target system values byte by byte, in
9056 increasing byte addresses. Only escape certain critical
9058 payload_length_bytes
=
9059 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
9060 &units_written
, payload_capacity_bytes
);
9062 /* If not all TODO units fit, then we'll need another packet. Make
9063 a second try to keep the end of the packet aligned. Don't do
9064 this if the packet is tiny. */
9065 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
9069 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
9071 if (new_todo_units
!= units_written
)
9072 payload_length_bytes
=
9073 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
9074 (gdb_byte
*) p
, &units_written
,
9075 payload_capacity_bytes
);
9078 p
+= payload_length_bytes
;
9079 if (use_length
&& units_written
< todo_units
)
9081 /* Escape chars have filled up the buffer prematurely,
9082 and we have actually sent fewer units than planned.
9083 Fix-up the length field of the packet. Use the same
9084 number of characters as before. */
9085 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
9087 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
9092 /* Normal mode: Send target system values byte by byte, in
9093 increasing byte addresses. Each byte is encoded as a two hex
9095 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
9096 units_written
= todo_units
;
9099 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
9100 getpkt (&rs
->buf
, 0);
9102 if (rs
->buf
[0] == 'E')
9103 return TARGET_XFER_E_IO
;
9105 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
9106 send fewer units than we'd planned. */
9107 *xfered_len_units
= (ULONGEST
) units_written
;
9108 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9111 /* Write memory data directly to the remote machine.
9112 This does not inform the data cache; the data cache uses this.
9113 MEMADDR is the address in the remote memory space.
9114 MYADDR is the address of the buffer in our space.
9115 LEN is the number of bytes.
9117 Return the transferred status, error or OK (an
9118 'enum target_xfer_status' value). Save the number of bytes
9119 transferred in *XFERED_LEN. Only transfer a single packet. */
9122 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
9123 ULONGEST len
, int unit_size
,
9124 ULONGEST
*xfered_len
)
9126 const char *packet_format
= NULL
;
9128 /* Check whether the target supports binary download. */
9129 check_binary_download (memaddr
);
9131 switch (packet_support (PACKET_X
))
9134 packet_format
= "X";
9136 case PACKET_DISABLE
:
9137 packet_format
= "M";
9139 case PACKET_SUPPORT_UNKNOWN
:
9140 internal_error (__FILE__
, __LINE__
,
9141 _("remote_write_bytes: bad internal state"));
9143 internal_error (__FILE__
, __LINE__
, _("bad switch"));
9146 return remote_write_bytes_aux (packet_format
,
9147 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
9148 packet_format
[0], 1);
9151 /* Read memory data directly from the remote machine.
9152 This does not use the data cache; the data cache uses this.
9153 MEMADDR is the address in the remote memory space.
9154 MYADDR is the address of the buffer in our space.
9155 LEN_UNITS is the number of addressable memory units to read..
9156 UNIT_SIZE is the length in bytes of an addressable unit.
9158 Return the transferred status, error or OK (an
9159 'enum target_xfer_status' value). Save the number of bytes
9160 transferred in *XFERED_LEN_UNITS.
9162 See the comment of remote_write_bytes_aux for an example of
9163 memory read/write exchange between gdb and the stub. */
9166 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
9168 int unit_size
, ULONGEST
*xfered_len_units
)
9170 struct remote_state
*rs
= get_remote_state ();
9171 int buf_size_bytes
; /* Max size of packet output buffer. */
9176 buf_size_bytes
= get_memory_read_packet_size ();
9177 /* The packet buffer will be large enough for the payload;
9178 get_memory_packet_size ensures this. */
9180 /* Number of units that will fit. */
9181 todo_units
= std::min (len_units
,
9182 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
9184 /* Construct "m"<memaddr>","<len>". */
9185 memaddr
= remote_address_masked (memaddr
);
9186 p
= rs
->buf
.data ();
9188 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9190 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
9193 getpkt (&rs
->buf
, 0);
9194 if (rs
->buf
[0] == 'E'
9195 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
9196 && rs
->buf
[3] == '\0')
9197 return TARGET_XFER_E_IO
;
9198 /* Reply describes memory byte by byte, each byte encoded as two hex
9200 p
= rs
->buf
.data ();
9201 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
9202 /* Return what we have. Let higher layers handle partial reads. */
9203 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
9204 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9207 /* Using the set of read-only target sections of remote, read live
9210 For interface/parameters/return description see target.h,
9214 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
9218 ULONGEST
*xfered_len
)
9220 const struct target_section
*secp
;
9222 secp
= target_section_by_addr (this, memaddr
);
9224 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
9226 ULONGEST memend
= memaddr
+ len
;
9228 const target_section_table
*table
= target_get_section_table (this);
9229 for (const target_section
&p
: *table
)
9231 if (memaddr
>= p
.addr
)
9233 if (memend
<= p
.endaddr
)
9235 /* Entire transfer is within this section. */
9236 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9239 else if (memaddr
>= p
.endaddr
)
9241 /* This section ends before the transfer starts. */
9246 /* This section overlaps the transfer. Just do half. */
9247 len
= p
.endaddr
- memaddr
;
9248 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9255 return TARGET_XFER_EOF
;
9258 /* Similar to remote_read_bytes_1, but it reads from the remote stub
9259 first if the requested memory is unavailable in traceframe.
9260 Otherwise, fall back to remote_read_bytes_1. */
9263 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
9264 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
9265 ULONGEST
*xfered_len
)
9268 return TARGET_XFER_EOF
;
9270 if (get_traceframe_number () != -1)
9272 std::vector
<mem_range
> available
;
9274 /* If we fail to get the set of available memory, then the
9275 target does not support querying traceframe info, and so we
9276 attempt reading from the traceframe anyway (assuming the
9277 target implements the old QTro packet then). */
9278 if (traceframe_available_memory (&available
, memaddr
, len
))
9280 if (available
.empty () || available
[0].start
!= memaddr
)
9282 enum target_xfer_status res
;
9284 /* Don't read into the traceframe's available
9286 if (!available
.empty ())
9288 LONGEST oldlen
= len
;
9290 len
= available
[0].start
- memaddr
;
9291 gdb_assert (len
<= oldlen
);
9294 /* This goes through the topmost target again. */
9295 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
9296 len
, unit_size
, xfered_len
);
9297 if (res
== TARGET_XFER_OK
)
9298 return TARGET_XFER_OK
;
9301 /* No use trying further, we know some memory starting
9302 at MEMADDR isn't available. */
9304 return (*xfered_len
!= 0) ?
9305 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
9309 /* Don't try to read more than how much is available, in
9310 case the target implements the deprecated QTro packet to
9311 cater for older GDBs (the target's knowledge of read-only
9312 sections may be outdated by now). */
9313 len
= available
[0].length
;
9317 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
9322 /* Sends a packet with content determined by the printf format string
9323 FORMAT and the remaining arguments, then gets the reply. Returns
9324 whether the packet was a success, a failure, or unknown. */
9327 remote_target::remote_send_printf (const char *format
, ...)
9329 struct remote_state
*rs
= get_remote_state ();
9330 int max_size
= get_remote_packet_size ();
9333 va_start (ap
, format
);
9336 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
9340 if (size
>= max_size
)
9341 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
9343 if (putpkt (rs
->buf
) < 0)
9344 error (_("Communication problem with target."));
9347 getpkt (&rs
->buf
, 0);
9349 return packet_check_result (rs
->buf
);
9352 /* Flash writing can take quite some time. We'll set
9353 effectively infinite timeout for flash operations.
9354 In future, we'll need to decide on a better approach. */
9355 static const int remote_flash_timeout
= 1000;
9358 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9360 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9361 enum packet_result ret
;
9362 scoped_restore restore_timeout
9363 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9365 ret
= remote_send_printf ("vFlashErase:%s,%s",
9366 phex (address
, addr_size
),
9370 case PACKET_UNKNOWN
:
9371 error (_("Remote target does not support flash erase"));
9373 error (_("Error erasing flash with vFlashErase packet"));
9380 remote_target::remote_flash_write (ULONGEST address
,
9381 ULONGEST length
, ULONGEST
*xfered_len
,
9382 const gdb_byte
*data
)
9384 scoped_restore restore_timeout
9385 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9386 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9391 remote_target::flash_done ()
9395 scoped_restore restore_timeout
9396 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9398 ret
= remote_send_printf ("vFlashDone");
9402 case PACKET_UNKNOWN
:
9403 error (_("Remote target does not support vFlashDone"));
9405 error (_("Error finishing flash operation"));
9412 remote_target::files_info ()
9414 puts_filtered ("Debugging a target over a serial line.\n");
9417 /* Stuff for dealing with the packets which are part of this protocol.
9418 See comment at top of file for details. */
9420 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9421 error to higher layers. Called when a serial error is detected.
9422 The exception message is STRING, followed by a colon and a blank,
9423 the system error message for errno at function entry and final dot
9424 for output compatibility with throw_perror_with_name. */
9427 unpush_and_perror (remote_target
*target
, const char *string
)
9429 int saved_errno
= errno
;
9431 remote_unpush_target (target
);
9432 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9433 safe_strerror (saved_errno
));
9436 /* Read a single character from the remote end. The current quit
9437 handler is overridden to avoid quitting in the middle of packet
9438 sequence, as that would break communication with the remote server.
9439 See remote_serial_quit_handler for more detail. */
9442 remote_target::readchar (int timeout
)
9445 struct remote_state
*rs
= get_remote_state ();
9448 scoped_restore restore_quit_target
9449 = make_scoped_restore (&curr_quit_handler_target
, this);
9450 scoped_restore restore_quit
9451 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9453 rs
->got_ctrlc_during_io
= 0;
9455 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9457 if (rs
->got_ctrlc_during_io
)
9464 switch ((enum serial_rc
) ch
)
9467 remote_unpush_target (this);
9468 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9471 unpush_and_perror (this, _("Remote communication error. "
9472 "Target disconnected."));
9474 case SERIAL_TIMEOUT
:
9480 /* Wrapper for serial_write that closes the target and throws if
9481 writing fails. The current quit handler is overridden to avoid
9482 quitting in the middle of packet sequence, as that would break
9483 communication with the remote server. See
9484 remote_serial_quit_handler for more detail. */
9487 remote_target::remote_serial_write (const char *str
, int len
)
9489 struct remote_state
*rs
= get_remote_state ();
9491 scoped_restore restore_quit_target
9492 = make_scoped_restore (&curr_quit_handler_target
, this);
9493 scoped_restore restore_quit
9494 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9496 rs
->got_ctrlc_during_io
= 0;
9498 if (serial_write (rs
->remote_desc
, str
, len
))
9500 unpush_and_perror (this, _("Remote communication error. "
9501 "Target disconnected."));
9504 if (rs
->got_ctrlc_during_io
)
9508 /* Return a string representing an escaped version of BUF, of len N.
9509 E.g. \n is converted to \\n, \t to \\t, etc. */
9512 escape_buffer (const char *buf
, int n
)
9516 stb
.putstrn (buf
, n
, '\\');
9517 return std::move (stb
.string ());
9520 /* Display a null-terminated packet on stdout, for debugging, using C
9524 print_packet (const char *buf
)
9526 puts_filtered ("\"");
9527 fputstr_filtered (buf
, '"', gdb_stdout
);
9528 puts_filtered ("\"");
9532 remote_target::putpkt (const char *buf
)
9534 return putpkt_binary (buf
, strlen (buf
));
9537 /* Wrapper around remote_target::putpkt to avoid exporting
9541 putpkt (remote_target
*remote
, const char *buf
)
9543 return remote
->putpkt (buf
);
9546 /* Send a packet to the remote machine, with error checking. The data
9547 of the packet is in BUF. The string in BUF can be at most
9548 get_remote_packet_size () - 5 to account for the $, # and checksum,
9549 and for a possible /0 if we are debugging (remote_debug) and want
9550 to print the sent packet as a string. */
9553 remote_target::putpkt_binary (const char *buf
, int cnt
)
9555 struct remote_state
*rs
= get_remote_state ();
9557 unsigned char csum
= 0;
9558 gdb::def_vector
<char> data (cnt
+ 6);
9559 char *buf2
= data
.data ();
9565 /* Catch cases like trying to read memory or listing threads while
9566 we're waiting for a stop reply. The remote server wouldn't be
9567 ready to handle this request, so we'd hang and timeout. We don't
9568 have to worry about this in synchronous mode, because in that
9569 case it's not possible to issue a command while the target is
9570 running. This is not a problem in non-stop mode, because in that
9571 case, the stub is always ready to process serial input. */
9572 if (!target_is_non_stop_p ()
9573 && target_is_async_p ()
9574 && rs
->waiting_for_stop_reply
)
9576 error (_("Cannot execute this command while the target is running.\n"
9577 "Use the \"interrupt\" command to stop the target\n"
9578 "and then try again."));
9581 /* We're sending out a new packet. Make sure we don't look at a
9582 stale cached response. */
9583 rs
->cached_wait_status
= 0;
9585 /* Copy the packet into buffer BUF2, encapsulating it
9586 and giving it a checksum. */
9591 for (i
= 0; i
< cnt
; i
++)
9597 *p
++ = tohex ((csum
>> 4) & 0xf);
9598 *p
++ = tohex (csum
& 0xf);
9600 /* Send it over and over until we get a positive ack. */
9608 int len
= (int) (p
- buf2
);
9611 if (remote_packet_max_chars
< 0)
9614 max_chars
= remote_packet_max_chars
;
9617 = escape_buffer (buf2
, std::min (len
, max_chars
));
9619 if (len
> max_chars
)
9620 remote_debug_printf_nofunc
9621 ("Sending packet: %s [%d bytes omitted]", str
.c_str (),
9624 remote_debug_printf_nofunc ("Sending packet: %s", str
.c_str ());
9626 remote_serial_write (buf2
, p
- buf2
);
9628 /* If this is a no acks version of the remote protocol, send the
9629 packet and move on. */
9633 /* Read until either a timeout occurs (-2) or '+' is read.
9634 Handle any notification that arrives in the mean time. */
9637 ch
= readchar (remote_timeout
);
9642 remote_debug_printf_nofunc ("Received Ack");
9645 remote_debug_printf_nofunc ("Received Nak");
9647 case SERIAL_TIMEOUT
:
9651 break; /* Retransmit buffer. */
9654 remote_debug_printf ("Packet instead of Ack, ignoring it");
9655 /* It's probably an old response sent because an ACK
9656 was lost. Gobble up the packet and ack it so it
9657 doesn't get retransmitted when we resend this
9660 remote_serial_write ("+", 1);
9661 continue; /* Now, go look for +. */
9668 /* If we got a notification, handle it, and go back to looking
9670 /* We've found the start of a notification. Now
9671 collect the data. */
9672 val
= read_frame (&rs
->buf
);
9675 remote_debug_printf_nofunc
9676 (" Notification received: %s",
9677 escape_buffer (rs
->buf
.data (), val
).c_str ());
9679 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9680 /* We're in sync now, rewait for the ack. */
9684 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9690 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9694 break; /* Here to retransmit. */
9698 /* This is wrong. If doing a long backtrace, the user should be
9699 able to get out next time we call QUIT, without anything as
9700 violent as interrupt_query. If we want to provide a way out of
9701 here without getting to the next QUIT, it should be based on
9702 hitting ^C twice as in remote_wait. */
9714 /* Come here after finding the start of a frame when we expected an
9715 ack. Do our best to discard the rest of this packet. */
9718 remote_target::skip_frame ()
9724 c
= readchar (remote_timeout
);
9727 case SERIAL_TIMEOUT
:
9728 /* Nothing we can do. */
9731 /* Discard the two bytes of checksum and stop. */
9732 c
= readchar (remote_timeout
);
9734 c
= readchar (remote_timeout
);
9737 case '*': /* Run length encoding. */
9738 /* Discard the repeat count. */
9739 c
= readchar (remote_timeout
);
9744 /* A regular character. */
9750 /* Come here after finding the start of the frame. Collect the rest
9751 into *BUF, verifying the checksum, length, and handling run-length
9752 compression. NUL terminate the buffer. If there is not enough room,
9755 Returns -1 on error, number of characters in buffer (ignoring the
9756 trailing NULL) on success. (could be extended to return one of the
9757 SERIAL status indications). */
9760 remote_target::read_frame (gdb::char_vector
*buf_p
)
9765 char *buf
= buf_p
->data ();
9766 struct remote_state
*rs
= get_remote_state ();
9773 c
= readchar (remote_timeout
);
9776 case SERIAL_TIMEOUT
:
9777 remote_debug_printf ("Timeout in mid-packet, retrying");
9781 remote_debug_printf ("Saw new packet start in middle of old one");
9782 return -1; /* Start a new packet, count retries. */
9786 unsigned char pktcsum
;
9792 check_0
= readchar (remote_timeout
);
9794 check_1
= readchar (remote_timeout
);
9796 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9798 remote_debug_printf ("Timeout in checksum, retrying");
9801 else if (check_0
< 0 || check_1
< 0)
9803 remote_debug_printf ("Communication error in checksum");
9807 /* Don't recompute the checksum; with no ack packets we
9808 don't have any way to indicate a packet retransmission
9813 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9814 if (csum
== pktcsum
)
9818 ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s",
9819 pktcsum
, csum
, escape_buffer (buf
, bc
).c_str ());
9821 /* Number of characters in buffer ignoring trailing
9825 case '*': /* Run length encoding. */
9830 c
= readchar (remote_timeout
);
9832 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9834 /* The character before ``*'' is repeated. */
9836 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9838 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9840 /* Make some more room in the buffer. */
9841 buf_p
->resize (buf_p
->size () + repeat
);
9842 buf
= buf_p
->data ();
9845 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9851 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9855 if (bc
>= buf_p
->size () - 1)
9857 /* Make some more room in the buffer. */
9858 buf_p
->resize (buf_p
->size () * 2);
9859 buf
= buf_p
->data ();
9869 /* Set this to the maximum number of seconds to wait instead of waiting forever
9870 in target_wait(). If this timer times out, then it generates an error and
9871 the command is aborted. This replaces most of the need for timeouts in the
9872 GDB test suite, and makes it possible to distinguish between a hung target
9873 and one with slow communications. */
9875 static int watchdog
= 0;
9877 show_watchdog (struct ui_file
*file
, int from_tty
,
9878 struct cmd_list_element
*c
, const char *value
)
9880 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
9883 /* Read a packet from the remote machine, with error checking, and
9884 store it in *BUF. Resize *BUF if necessary to hold the result. If
9885 FOREVER, wait forever rather than timing out; this is used (in
9886 synchronous mode) to wait for a target that is is executing user
9888 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9889 don't have to change all the calls to getpkt to deal with the
9890 return value, because at the moment I don't know what the right
9891 thing to do it for those. */
9894 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9896 getpkt_sane (buf
, forever
);
9900 /* Read a packet from the remote machine, with error checking, and
9901 store it in *BUF. Resize *BUF if necessary to hold the result. If
9902 FOREVER, wait forever rather than timing out; this is used (in
9903 synchronous mode) to wait for a target that is is executing user
9904 code to stop. If FOREVER == 0, this function is allowed to time
9905 out gracefully and return an indication of this to the caller.
9906 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9907 consider receiving a notification enough reason to return to the
9908 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9909 holds a notification or not (a regular packet). */
9912 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9913 int forever
, int expecting_notif
,
9916 struct remote_state
*rs
= get_remote_state ();
9922 /* We're reading a new response. Make sure we don't look at a
9923 previously cached response. */
9924 rs
->cached_wait_status
= 0;
9926 strcpy (buf
->data (), "timeout");
9929 timeout
= watchdog
> 0 ? watchdog
: -1;
9930 else if (expecting_notif
)
9931 timeout
= 0; /* There should already be a char in the buffer. If
9934 timeout
= remote_timeout
;
9938 /* Process any number of notifications, and then return when
9942 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9944 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9946 /* This can loop forever if the remote side sends us
9947 characters continuously, but if it pauses, we'll get
9948 SERIAL_TIMEOUT from readchar because of timeout. Then
9949 we'll count that as a retry.
9951 Note that even when forever is set, we will only wait
9952 forever prior to the start of a packet. After that, we
9953 expect characters to arrive at a brisk pace. They should
9954 show up within remote_timeout intervals. */
9956 c
= readchar (timeout
);
9957 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9959 if (c
== SERIAL_TIMEOUT
)
9961 if (expecting_notif
)
9962 return -1; /* Don't complain, it's normal to not get
9963 anything in this case. */
9965 if (forever
) /* Watchdog went off? Kill the target. */
9967 remote_unpush_target (this);
9968 throw_error (TARGET_CLOSE_ERROR
,
9969 _("Watchdog timeout has expired. "
9970 "Target detached."));
9973 remote_debug_printf ("Timed out.");
9977 /* We've found the start of a packet or notification.
9978 Now collect the data. */
9979 val
= read_frame (buf
);
9984 remote_serial_write ("-", 1);
9987 if (tries
> MAX_TRIES
)
9989 /* We have tried hard enough, and just can't receive the
9990 packet/notification. Give up. */
9991 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9993 /* Skip the ack char if we're in no-ack mode. */
9994 if (!rs
->noack_mode
)
9995 remote_serial_write ("+", 1);
9999 /* If we got an ordinary packet, return that to our caller. */
10006 if (remote_packet_max_chars
< 0)
10009 max_chars
= remote_packet_max_chars
;
10012 = escape_buffer (buf
->data (),
10013 std::min (val
, max_chars
));
10015 if (val
> max_chars
)
10016 remote_debug_printf_nofunc
10017 ("Packet received: %s [%d bytes omitted]", str
.c_str (),
10020 remote_debug_printf_nofunc ("Packet received: %s",
10024 /* Skip the ack char if we're in no-ack mode. */
10025 if (!rs
->noack_mode
)
10026 remote_serial_write ("+", 1);
10027 if (is_notif
!= NULL
)
10032 /* If we got a notification, handle it, and go back to looking
10036 gdb_assert (c
== '%');
10038 remote_debug_printf_nofunc
10039 (" Notification received: %s",
10040 escape_buffer (buf
->data (), val
).c_str ());
10042 if (is_notif
!= NULL
)
10045 handle_notification (rs
->notif_state
, buf
->data ());
10047 /* Notifications require no acknowledgement. */
10049 if (expecting_notif
)
10056 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
10058 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
10062 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
10065 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
10068 /* Kill any new fork children of process PID that haven't been
10069 processed by follow_fork. */
10072 remote_target::kill_new_fork_children (int pid
)
10074 remote_state
*rs
= get_remote_state ();
10075 struct notif_client
*notif
= ¬if_client_stop
;
10077 /* Kill the fork child threads of any threads in process PID
10078 that are stopped at a fork event. */
10079 for (thread_info
*thread
: all_non_exited_threads (this))
10081 struct target_waitstatus
*ws
= &thread
->pending_follow
;
10083 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
10085 int child_pid
= ws
->value
.related_pid
.pid ();
10088 res
= remote_vkill (child_pid
);
10090 error (_("Can't kill fork child process %d"), child_pid
);
10094 /* Check for any pending fork events (not reported or processed yet)
10095 in process PID and kill those fork child threads as well. */
10096 remote_notif_get_pending_events (notif
);
10097 for (auto &event
: rs
->stop_reply_queue
)
10098 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
10100 int child_pid
= event
->ws
.value
.related_pid
.pid ();
10103 res
= remote_vkill (child_pid
);
10105 error (_("Can't kill fork child process %d"), child_pid
);
10110 /* Target hook to kill the current inferior. */
10113 remote_target::kill ()
10116 int pid
= inferior_ptid
.pid ();
10117 struct remote_state
*rs
= get_remote_state ();
10119 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
10121 /* If we're stopped while forking and we haven't followed yet,
10122 kill the child task. We need to do this before killing the
10123 parent task because if this is a vfork then the parent will
10125 kill_new_fork_children (pid
);
10127 res
= remote_vkill (pid
);
10130 target_mourn_inferior (inferior_ptid
);
10135 /* If we are in 'target remote' mode and we are killing the only
10136 inferior, then we will tell gdbserver to exit and unpush the
10138 if (res
== -1 && !remote_multi_process_p (rs
)
10139 && number_of_live_inferiors (this) == 1)
10143 /* We've killed the remote end, we get to mourn it. If we are
10144 not in extended mode, mourning the inferior also unpushes
10145 remote_ops from the target stack, which closes the remote
10147 target_mourn_inferior (inferior_ptid
);
10152 error (_("Can't kill process"));
10155 /* Send a kill request to the target using the 'vKill' packet. */
10158 remote_target::remote_vkill (int pid
)
10160 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
10163 remote_state
*rs
= get_remote_state ();
10165 /* Tell the remote target to detach. */
10166 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
10168 getpkt (&rs
->buf
, 0);
10170 switch (packet_ok (rs
->buf
,
10171 &remote_protocol_packets
[PACKET_vKill
]))
10177 case PACKET_UNKNOWN
:
10180 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
10184 /* Send a kill request to the target using the 'k' packet. */
10187 remote_target::remote_kill_k ()
10189 /* Catch errors so the user can quit from gdb even when we
10190 aren't on speaking terms with the remote system. */
10195 catch (const gdb_exception_error
&ex
)
10197 if (ex
.error
== TARGET_CLOSE_ERROR
)
10199 /* If we got an (EOF) error that caused the target
10200 to go away, then we're done, that's what we wanted.
10201 "k" is susceptible to cause a premature EOF, given
10202 that the remote server isn't actually required to
10203 reply to "k", and it can happen that it doesn't
10204 even get to reply ACK to the "k". */
10208 /* Otherwise, something went wrong. We didn't actually kill
10209 the target. Just propagate the exception, and let the
10210 user or higher layers decide what to do. */
10216 remote_target::mourn_inferior ()
10218 struct remote_state
*rs
= get_remote_state ();
10220 /* We're no longer interested in notification events of an inferior
10221 that exited or was killed/detached. */
10222 discard_pending_stop_replies (current_inferior ());
10224 /* In 'target remote' mode with one inferior, we close the connection. */
10225 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
10227 remote_unpush_target (this);
10231 /* In case we got here due to an error, but we're going to stay
10233 rs
->waiting_for_stop_reply
= 0;
10235 /* If the current general thread belonged to the process we just
10236 detached from or has exited, the remote side current general
10237 thread becomes undefined. Considering a case like this:
10239 - We just got here due to a detach.
10240 - The process that we're detaching from happens to immediately
10241 report a global breakpoint being hit in non-stop mode, in the
10242 same thread we had selected before.
10243 - GDB attaches to this process again.
10244 - This event happens to be the next event we handle.
10246 GDB would consider that the current general thread didn't need to
10247 be set on the stub side (with Hg), since for all it knew,
10248 GENERAL_THREAD hadn't changed.
10250 Notice that although in all-stop mode, the remote server always
10251 sets the current thread to the thread reporting the stop event,
10252 that doesn't happen in non-stop mode; in non-stop, the stub *must
10253 not* change the current thread when reporting a breakpoint hit,
10254 due to the decoupling of event reporting and event handling.
10256 To keep things simple, we always invalidate our notion of the
10258 record_currthread (rs
, minus_one_ptid
);
10260 /* Call common code to mark the inferior as not running. */
10261 generic_mourn_inferior ();
10265 extended_remote_target::supports_disable_randomization ()
10267 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
10271 remote_target::extended_remote_disable_randomization (int val
)
10273 struct remote_state
*rs
= get_remote_state ();
10276 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10277 "QDisableRandomization:%x", val
);
10279 reply
= remote_get_noisy_reply ();
10280 if (*reply
== '\0')
10281 error (_("Target does not support QDisableRandomization."));
10282 if (strcmp (reply
, "OK") != 0)
10283 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10287 remote_target::extended_remote_run (const std::string
&args
)
10289 struct remote_state
*rs
= get_remote_state ();
10291 const char *remote_exec_file
= get_remote_exec_file ();
10293 /* If the user has disabled vRun support, or we have detected that
10294 support is not available, do not try it. */
10295 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10298 strcpy (rs
->buf
.data (), "vRun;");
10299 len
= strlen (rs
->buf
.data ());
10301 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10302 error (_("Remote file name too long for run packet"));
10303 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10304 strlen (remote_exec_file
));
10306 if (!args
.empty ())
10310 gdb_argv
argv (args
.c_str ());
10311 for (i
= 0; argv
[i
] != NULL
; i
++)
10313 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10314 error (_("Argument list too long for run packet"));
10315 rs
->buf
[len
++] = ';';
10316 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10321 rs
->buf
[len
++] = '\0';
10324 getpkt (&rs
->buf
, 0);
10326 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10329 /* We have a wait response. All is well. */
10331 case PACKET_UNKNOWN
:
10334 if (remote_exec_file
[0] == '\0')
10335 error (_("Running the default executable on the remote target failed; "
10336 "try \"set remote exec-file\"?"));
10338 error (_("Running \"%s\" on the remote target failed"),
10341 gdb_assert_not_reached (_("bad switch"));
10345 /* Helper function to send set/unset environment packets. ACTION is
10346 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10347 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10351 remote_target::send_environment_packet (const char *action
,
10352 const char *packet
,
10355 remote_state
*rs
= get_remote_state ();
10357 /* Convert the environment variable to an hex string, which
10358 is the best format to be transmitted over the wire. */
10359 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10362 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10363 "%s:%s", packet
, encoded_value
.c_str ());
10366 getpkt (&rs
->buf
, 0);
10367 if (strcmp (rs
->buf
.data (), "OK") != 0)
10368 warning (_("Unable to %s environment variable '%s' on remote."),
10372 /* Helper function to handle the QEnvironment* packets. */
10375 remote_target::extended_remote_environment_support ()
10377 remote_state
*rs
= get_remote_state ();
10379 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10381 putpkt ("QEnvironmentReset");
10382 getpkt (&rs
->buf
, 0);
10383 if (strcmp (rs
->buf
.data (), "OK") != 0)
10384 warning (_("Unable to reset environment on remote."));
10387 gdb_environ
*e
= ¤t_inferior ()->environment
;
10389 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10390 for (const std::string
&el
: e
->user_set_env ())
10391 send_environment_packet ("set", "QEnvironmentHexEncoded",
10394 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10395 for (const std::string
&el
: e
->user_unset_env ())
10396 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10399 /* Helper function to set the current working directory for the
10400 inferior in the remote target. */
10403 remote_target::extended_remote_set_inferior_cwd ()
10405 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10407 const std::string
&inferior_cwd
= current_inferior ()->cwd ();
10408 remote_state
*rs
= get_remote_state ();
10410 if (!inferior_cwd
.empty ())
10412 std::string hexpath
10413 = bin2hex ((const gdb_byte
*) inferior_cwd
.data (),
10414 inferior_cwd
.size ());
10416 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10417 "QSetWorkingDir:%s", hexpath
.c_str ());
10421 /* An empty inferior_cwd means that the user wants us to
10422 reset the remote server's inferior's cwd. */
10423 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10424 "QSetWorkingDir:");
10428 getpkt (&rs
->buf
, 0);
10429 if (packet_ok (rs
->buf
,
10430 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10433 Remote replied unexpectedly while setting the inferior's working\n\
10440 /* In the extended protocol we want to be able to do things like
10441 "run" and have them basically work as expected. So we need
10442 a special create_inferior function. We support changing the
10443 executable file and the command line arguments, but not the
10447 extended_remote_target::create_inferior (const char *exec_file
,
10448 const std::string
&args
,
10449 char **env
, int from_tty
)
10453 struct remote_state
*rs
= get_remote_state ();
10454 const char *remote_exec_file
= get_remote_exec_file ();
10456 /* If running asynchronously, register the target file descriptor
10457 with the event loop. */
10458 if (target_can_async_p ())
10461 /* Disable address space randomization if requested (and supported). */
10462 if (supports_disable_randomization ())
10463 extended_remote_disable_randomization (disable_randomization
);
10465 /* If startup-with-shell is on, we inform gdbserver to start the
10466 remote inferior using a shell. */
10467 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10469 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10470 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10472 getpkt (&rs
->buf
, 0);
10473 if (strcmp (rs
->buf
.data (), "OK") != 0)
10475 Remote replied unexpectedly while setting startup-with-shell: %s"),
10479 extended_remote_environment_support ();
10481 extended_remote_set_inferior_cwd ();
10483 /* Now restart the remote server. */
10484 run_worked
= extended_remote_run (args
) != -1;
10487 /* vRun was not supported. Fail if we need it to do what the
10489 if (remote_exec_file
[0])
10490 error (_("Remote target does not support \"set remote exec-file\""));
10491 if (!args
.empty ())
10492 error (_("Remote target does not support \"set args\" or run ARGS"));
10494 /* Fall back to "R". */
10495 extended_remote_restart ();
10498 /* vRun's success return is a stop reply. */
10499 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10500 add_current_inferior_and_thread (stop_reply
);
10502 /* Get updated offsets, if the stub uses qOffsets. */
10507 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10508 the list of conditions (in agent expression bytecode format), if any, the
10509 target needs to evaluate. The output is placed into the packet buffer
10510 started from BUF and ended at BUF_END. */
10513 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10514 struct bp_target_info
*bp_tgt
, char *buf
,
10517 if (bp_tgt
->conditions
.empty ())
10520 buf
+= strlen (buf
);
10521 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10524 /* Send conditions to the target. */
10525 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10527 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10528 buf
+= strlen (buf
);
10529 for (int i
= 0; i
< aexpr
->len
; ++i
)
10530 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10537 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10538 struct bp_target_info
*bp_tgt
, char *buf
)
10540 if (bp_tgt
->tcommands
.empty ())
10543 buf
+= strlen (buf
);
10545 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10546 buf
+= strlen (buf
);
10548 /* Concatenate all the agent expressions that are commands into the
10550 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10552 sprintf (buf
, "X%x,", aexpr
->len
);
10553 buf
+= strlen (buf
);
10554 for (int i
= 0; i
< aexpr
->len
; ++i
)
10555 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10560 /* Insert a breakpoint. On targets that have software breakpoint
10561 support, we ask the remote target to do the work; on targets
10562 which don't, we insert a traditional memory breakpoint. */
10565 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10566 struct bp_target_info
*bp_tgt
)
10568 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10569 If it succeeds, then set the support to PACKET_ENABLE. If it
10570 fails, and the user has explicitly requested the Z support then
10571 report an error, otherwise, mark it disabled and go on. */
10573 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10575 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10576 struct remote_state
*rs
;
10579 /* Make sure the remote is pointing at the right process, if
10581 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10582 set_general_process ();
10584 rs
= get_remote_state ();
10585 p
= rs
->buf
.data ();
10586 endbuf
= p
+ get_remote_packet_size ();
10591 addr
= (ULONGEST
) remote_address_masked (addr
);
10592 p
+= hexnumstr (p
, addr
);
10593 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10595 if (supports_evaluation_of_breakpoint_conditions ())
10596 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10598 if (can_run_breakpoint_commands ())
10599 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10602 getpkt (&rs
->buf
, 0);
10604 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10610 case PACKET_UNKNOWN
:
10615 /* If this breakpoint has target-side commands but this stub doesn't
10616 support Z0 packets, throw error. */
10617 if (!bp_tgt
->tcommands
.empty ())
10618 throw_error (NOT_SUPPORTED_ERROR
, _("\
10619 Target doesn't support breakpoints that have target side commands."));
10621 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10625 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10626 struct bp_target_info
*bp_tgt
,
10627 enum remove_bp_reason reason
)
10629 CORE_ADDR addr
= bp_tgt
->placed_address
;
10630 struct remote_state
*rs
= get_remote_state ();
10632 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10634 char *p
= rs
->buf
.data ();
10635 char *endbuf
= p
+ get_remote_packet_size ();
10637 /* Make sure the remote is pointing at the right process, if
10639 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10640 set_general_process ();
10646 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10647 p
+= hexnumstr (p
, addr
);
10648 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10651 getpkt (&rs
->buf
, 0);
10653 return (rs
->buf
[0] == 'E');
10656 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10659 static enum Z_packet_type
10660 watchpoint_to_Z_packet (int type
)
10665 return Z_PACKET_WRITE_WP
;
10668 return Z_PACKET_READ_WP
;
10671 return Z_PACKET_ACCESS_WP
;
10674 internal_error (__FILE__
, __LINE__
,
10675 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10680 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10681 enum target_hw_bp_type type
, struct expression
*cond
)
10683 struct remote_state
*rs
= get_remote_state ();
10684 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10686 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10688 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10691 /* Make sure the remote is pointing at the right process, if
10693 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10694 set_general_process ();
10696 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10697 p
= strchr (rs
->buf
.data (), '\0');
10698 addr
= remote_address_masked (addr
);
10699 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10700 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10703 getpkt (&rs
->buf
, 0);
10705 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10709 case PACKET_UNKNOWN
:
10714 internal_error (__FILE__
, __LINE__
,
10715 _("remote_insert_watchpoint: reached end of function"));
10719 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10720 CORE_ADDR start
, int length
)
10722 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10724 return diff
< length
;
10729 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10730 enum target_hw_bp_type type
, struct expression
*cond
)
10732 struct remote_state
*rs
= get_remote_state ();
10733 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10735 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10737 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10740 /* Make sure the remote is pointing at the right process, if
10742 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10743 set_general_process ();
10745 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10746 p
= strchr (rs
->buf
.data (), '\0');
10747 addr
= remote_address_masked (addr
);
10748 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10749 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10751 getpkt (&rs
->buf
, 0);
10753 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10756 case PACKET_UNKNOWN
:
10761 internal_error (__FILE__
, __LINE__
,
10762 _("remote_remove_watchpoint: reached end of function"));
10766 static int remote_hw_watchpoint_limit
= -1;
10767 static int remote_hw_watchpoint_length_limit
= -1;
10768 static int remote_hw_breakpoint_limit
= -1;
10771 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10773 if (remote_hw_watchpoint_length_limit
== 0)
10775 else if (remote_hw_watchpoint_length_limit
< 0)
10777 else if (len
<= remote_hw_watchpoint_length_limit
)
10784 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10786 if (type
== bp_hardware_breakpoint
)
10788 if (remote_hw_breakpoint_limit
== 0)
10790 else if (remote_hw_breakpoint_limit
< 0)
10792 else if (cnt
<= remote_hw_breakpoint_limit
)
10797 if (remote_hw_watchpoint_limit
== 0)
10799 else if (remote_hw_watchpoint_limit
< 0)
10803 else if (cnt
<= remote_hw_watchpoint_limit
)
10809 /* The to_stopped_by_sw_breakpoint method of target remote. */
10812 remote_target::stopped_by_sw_breakpoint ()
10814 struct thread_info
*thread
= inferior_thread ();
10816 return (thread
->priv
!= NULL
10817 && (get_remote_thread_info (thread
)->stop_reason
10818 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10821 /* The to_supports_stopped_by_sw_breakpoint method of target
10825 remote_target::supports_stopped_by_sw_breakpoint ()
10827 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10830 /* The to_stopped_by_hw_breakpoint method of target remote. */
10833 remote_target::stopped_by_hw_breakpoint ()
10835 struct thread_info
*thread
= inferior_thread ();
10837 return (thread
->priv
!= NULL
10838 && (get_remote_thread_info (thread
)->stop_reason
10839 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10842 /* The to_supports_stopped_by_hw_breakpoint method of target
10846 remote_target::supports_stopped_by_hw_breakpoint ()
10848 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10852 remote_target::stopped_by_watchpoint ()
10854 struct thread_info
*thread
= inferior_thread ();
10856 return (thread
->priv
!= NULL
10857 && (get_remote_thread_info (thread
)->stop_reason
10858 == TARGET_STOPPED_BY_WATCHPOINT
));
10862 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10864 struct thread_info
*thread
= inferior_thread ();
10866 if (thread
->priv
!= NULL
10867 && (get_remote_thread_info (thread
)->stop_reason
10868 == TARGET_STOPPED_BY_WATCHPOINT
))
10870 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10879 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10880 struct bp_target_info
*bp_tgt
)
10882 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10883 struct remote_state
*rs
;
10887 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10890 /* Make sure the remote is pointing at the right process, if
10892 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10893 set_general_process ();
10895 rs
= get_remote_state ();
10896 p
= rs
->buf
.data ();
10897 endbuf
= p
+ get_remote_packet_size ();
10903 addr
= remote_address_masked (addr
);
10904 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10905 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10907 if (supports_evaluation_of_breakpoint_conditions ())
10908 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10910 if (can_run_breakpoint_commands ())
10911 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10914 getpkt (&rs
->buf
, 0);
10916 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10919 if (rs
->buf
[1] == '.')
10921 message
= strchr (&rs
->buf
[2], '.');
10923 error (_("Remote failure reply: %s"), message
+ 1);
10926 case PACKET_UNKNOWN
:
10931 internal_error (__FILE__
, __LINE__
,
10932 _("remote_insert_hw_breakpoint: reached end of function"));
10937 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10938 struct bp_target_info
*bp_tgt
)
10941 struct remote_state
*rs
= get_remote_state ();
10942 char *p
= rs
->buf
.data ();
10943 char *endbuf
= p
+ get_remote_packet_size ();
10945 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10948 /* Make sure the remote is pointing at the right process, if
10950 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10951 set_general_process ();
10957 addr
= remote_address_masked (bp_tgt
->placed_address
);
10958 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10959 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10962 getpkt (&rs
->buf
, 0);
10964 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10967 case PACKET_UNKNOWN
:
10972 internal_error (__FILE__
, __LINE__
,
10973 _("remote_remove_hw_breakpoint: reached end of function"));
10976 /* Verify memory using the "qCRC:" request. */
10979 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10981 struct remote_state
*rs
= get_remote_state ();
10982 unsigned long host_crc
, target_crc
;
10985 /* It doesn't make sense to use qCRC if the remote target is
10986 connected but not running. */
10987 if (target_has_execution ()
10988 && packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10990 enum packet_result result
;
10992 /* Make sure the remote is pointing at the right process. */
10993 set_general_process ();
10995 /* FIXME: assumes lma can fit into long. */
10996 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10997 (long) lma
, (long) size
);
11000 /* Be clever; compute the host_crc before waiting for target
11002 host_crc
= xcrc32 (data
, size
, 0xffffffff);
11004 getpkt (&rs
->buf
, 0);
11006 result
= packet_ok (rs
->buf
,
11007 &remote_protocol_packets
[PACKET_qCRC
]);
11008 if (result
== PACKET_ERROR
)
11010 else if (result
== PACKET_OK
)
11012 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
11013 target_crc
= target_crc
* 16 + fromhex (*tmp
);
11015 return (host_crc
== target_crc
);
11019 return simple_verify_memory (this, data
, lma
, size
);
11022 /* compare-sections command
11024 With no arguments, compares each loadable section in the exec bfd
11025 with the same memory range on the target, and reports mismatches.
11026 Useful for verifying the image on the target against the exec file. */
11029 compare_sections_command (const char *args
, int from_tty
)
11032 const char *sectname
;
11033 bfd_size_type size
;
11036 int mismatched
= 0;
11040 if (!current_program_space
->exec_bfd ())
11041 error (_("command cannot be used without an exec file"));
11043 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
11049 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
11051 if (!(s
->flags
& SEC_LOAD
))
11052 continue; /* Skip non-loadable section. */
11054 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
11055 continue; /* Skip writeable sections */
11057 size
= bfd_section_size (s
);
11059 continue; /* Skip zero-length section. */
11061 sectname
= bfd_section_name (s
);
11062 if (args
&& strcmp (args
, sectname
) != 0)
11063 continue; /* Not the section selected by user. */
11065 matched
= 1; /* Do this section. */
11068 gdb::byte_vector
sectdata (size
);
11069 bfd_get_section_contents (current_program_space
->exec_bfd (), s
,
11070 sectdata
.data (), 0, size
);
11072 res
= target_verify_memory (sectdata
.data (), lma
, size
);
11075 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
11076 paddress (target_gdbarch (), lma
),
11077 paddress (target_gdbarch (), lma
+ size
));
11079 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
11080 paddress (target_gdbarch (), lma
),
11081 paddress (target_gdbarch (), lma
+ size
));
11083 printf_filtered ("matched.\n");
11086 printf_filtered ("MIS-MATCHED!\n");
11090 if (mismatched
> 0)
11091 warning (_("One or more sections of the target image does not match\n\
11092 the loaded file\n"));
11093 if (args
&& !matched
)
11094 printf_filtered (_("No loaded section named '%s'.\n"), args
);
11097 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
11098 into remote target. The number of bytes written to the remote
11099 target is returned, or -1 for error. */
11102 remote_target::remote_write_qxfer (const char *object_name
,
11103 const char *annex
, const gdb_byte
*writebuf
,
11104 ULONGEST offset
, LONGEST len
,
11105 ULONGEST
*xfered_len
,
11106 struct packet_config
*packet
)
11110 struct remote_state
*rs
= get_remote_state ();
11111 int max_size
= get_memory_write_packet_size ();
11113 if (packet_config_support (packet
) == PACKET_DISABLE
)
11114 return TARGET_XFER_E_IO
;
11116 /* Insert header. */
11117 i
= snprintf (rs
->buf
.data (), max_size
,
11118 "qXfer:%s:write:%s:%s:",
11119 object_name
, annex
? annex
: "",
11120 phex_nz (offset
, sizeof offset
));
11121 max_size
-= (i
+ 1);
11123 /* Escape as much data as fits into rs->buf. */
11124 buf_len
= remote_escape_output
11125 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
11127 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
11128 || getpkt_sane (&rs
->buf
, 0) < 0
11129 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11130 return TARGET_XFER_E_IO
;
11132 unpack_varlen_hex (rs
->buf
.data (), &n
);
11135 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11138 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
11139 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
11140 number of bytes read is returned, or 0 for EOF, or -1 for error.
11141 The number of bytes read may be less than LEN without indicating an
11142 EOF. PACKET is checked and updated to indicate whether the remote
11143 target supports this object. */
11146 remote_target::remote_read_qxfer (const char *object_name
,
11148 gdb_byte
*readbuf
, ULONGEST offset
,
11150 ULONGEST
*xfered_len
,
11151 struct packet_config
*packet
)
11153 struct remote_state
*rs
= get_remote_state ();
11154 LONGEST i
, n
, packet_len
;
11156 if (packet_config_support (packet
) == PACKET_DISABLE
)
11157 return TARGET_XFER_E_IO
;
11159 /* Check whether we've cached an end-of-object packet that matches
11161 if (rs
->finished_object
)
11163 if (strcmp (object_name
, rs
->finished_object
) == 0
11164 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
11165 && offset
== rs
->finished_offset
)
11166 return TARGET_XFER_EOF
;
11169 /* Otherwise, we're now reading something different. Discard
11171 xfree (rs
->finished_object
);
11172 xfree (rs
->finished_annex
);
11173 rs
->finished_object
= NULL
;
11174 rs
->finished_annex
= NULL
;
11177 /* Request only enough to fit in a single packet. The actual data
11178 may not, since we don't know how much of it will need to be escaped;
11179 the target is free to respond with slightly less data. We subtract
11180 five to account for the response type and the protocol frame. */
11181 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
11182 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
11183 "qXfer:%s:read:%s:%s,%s",
11184 object_name
, annex
? annex
: "",
11185 phex_nz (offset
, sizeof offset
),
11186 phex_nz (n
, sizeof n
));
11187 i
= putpkt (rs
->buf
);
11189 return TARGET_XFER_E_IO
;
11192 packet_len
= getpkt_sane (&rs
->buf
, 0);
11193 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11194 return TARGET_XFER_E_IO
;
11196 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
11197 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
11199 /* 'm' means there is (or at least might be) more data after this
11200 batch. That does not make sense unless there's at least one byte
11201 of data in this reply. */
11202 if (rs
->buf
[0] == 'm' && packet_len
== 1)
11203 error (_("Remote qXfer reply contained no data."));
11205 /* Got some data. */
11206 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
11207 packet_len
- 1, readbuf
, n
);
11209 /* 'l' is an EOF marker, possibly including a final block of data,
11210 or possibly empty. If we have the final block of a non-empty
11211 object, record this fact to bypass a subsequent partial read. */
11212 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
11214 rs
->finished_object
= xstrdup (object_name
);
11215 rs
->finished_annex
= xstrdup (annex
? annex
: "");
11216 rs
->finished_offset
= offset
+ i
;
11220 return TARGET_XFER_EOF
;
11224 return TARGET_XFER_OK
;
11228 enum target_xfer_status
11229 remote_target::xfer_partial (enum target_object object
,
11230 const char *annex
, gdb_byte
*readbuf
,
11231 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
11232 ULONGEST
*xfered_len
)
11234 struct remote_state
*rs
;
11238 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
11240 set_remote_traceframe ();
11241 set_general_thread (inferior_ptid
);
11243 rs
= get_remote_state ();
11245 /* Handle memory using the standard memory routines. */
11246 if (object
== TARGET_OBJECT_MEMORY
)
11248 /* If the remote target is connected but not running, we should
11249 pass this request down to a lower stratum (e.g. the executable
11251 if (!target_has_execution ())
11252 return TARGET_XFER_EOF
;
11254 if (writebuf
!= NULL
)
11255 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
11258 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
11262 /* Handle extra signal info using qxfer packets. */
11263 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
11266 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
11267 xfered_len
, &remote_protocol_packets
11268 [PACKET_qXfer_siginfo_read
]);
11270 return remote_write_qxfer ("siginfo", annex
,
11271 writebuf
, offset
, len
, xfered_len
,
11272 &remote_protocol_packets
11273 [PACKET_qXfer_siginfo_write
]);
11276 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
11279 return remote_read_qxfer ("statictrace", annex
,
11280 readbuf
, offset
, len
, xfered_len
,
11281 &remote_protocol_packets
11282 [PACKET_qXfer_statictrace_read
]);
11284 return TARGET_XFER_E_IO
;
11287 /* Only handle flash writes. */
11288 if (writebuf
!= NULL
)
11292 case TARGET_OBJECT_FLASH
:
11293 return remote_flash_write (offset
, len
, xfered_len
,
11297 return TARGET_XFER_E_IO
;
11301 /* Map pre-existing objects onto letters. DO NOT do this for new
11302 objects!!! Instead specify new query packets. */
11305 case TARGET_OBJECT_AVR
:
11309 case TARGET_OBJECT_AUXV
:
11310 gdb_assert (annex
== NULL
);
11311 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
11313 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
11315 case TARGET_OBJECT_AVAILABLE_FEATURES
:
11316 return remote_read_qxfer
11317 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
11318 &remote_protocol_packets
[PACKET_qXfer_features
]);
11320 case TARGET_OBJECT_LIBRARIES
:
11321 return remote_read_qxfer
11322 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
11323 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
11325 case TARGET_OBJECT_LIBRARIES_SVR4
:
11326 return remote_read_qxfer
11327 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
11328 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
11330 case TARGET_OBJECT_MEMORY_MAP
:
11331 gdb_assert (annex
== NULL
);
11332 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
11334 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
11336 case TARGET_OBJECT_OSDATA
:
11337 /* Should only get here if we're connected. */
11338 gdb_assert (rs
->remote_desc
);
11339 return remote_read_qxfer
11340 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
11341 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
11343 case TARGET_OBJECT_THREADS
:
11344 gdb_assert (annex
== NULL
);
11345 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
11347 &remote_protocol_packets
[PACKET_qXfer_threads
]);
11349 case TARGET_OBJECT_TRACEFRAME_INFO
:
11350 gdb_assert (annex
== NULL
);
11351 return remote_read_qxfer
11352 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11353 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11355 case TARGET_OBJECT_FDPIC
:
11356 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11358 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11360 case TARGET_OBJECT_OPENVMS_UIB
:
11361 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11363 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11365 case TARGET_OBJECT_BTRACE
:
11366 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11368 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11370 case TARGET_OBJECT_BTRACE_CONF
:
11371 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11373 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11375 case TARGET_OBJECT_EXEC_FILE
:
11376 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11378 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11381 return TARGET_XFER_E_IO
;
11384 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11385 large enough let the caller deal with it. */
11386 if (len
< get_remote_packet_size ())
11387 return TARGET_XFER_E_IO
;
11388 len
= get_remote_packet_size ();
11390 /* Except for querying the minimum buffer size, target must be open. */
11391 if (!rs
->remote_desc
)
11392 error (_("remote query is only available after target open"));
11394 gdb_assert (annex
!= NULL
);
11395 gdb_assert (readbuf
!= NULL
);
11397 p2
= rs
->buf
.data ();
11399 *p2
++ = query_type
;
11401 /* We used one buffer char for the remote protocol q command and
11402 another for the query type. As the remote protocol encapsulation
11403 uses 4 chars plus one extra in case we are debugging
11404 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11407 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11409 /* Bad caller may have sent forbidden characters. */
11410 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11415 gdb_assert (annex
[i
] == '\0');
11417 i
= putpkt (rs
->buf
);
11419 return TARGET_XFER_E_IO
;
11421 getpkt (&rs
->buf
, 0);
11422 strcpy ((char *) readbuf
, rs
->buf
.data ());
11424 *xfered_len
= strlen ((char *) readbuf
);
11425 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11428 /* Implementation of to_get_memory_xfer_limit. */
11431 remote_target::get_memory_xfer_limit ()
11433 return get_memory_write_packet_size ();
11437 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11438 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11439 CORE_ADDR
*found_addrp
)
11441 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11442 struct remote_state
*rs
= get_remote_state ();
11443 int max_size
= get_memory_write_packet_size ();
11444 struct packet_config
*packet
=
11445 &remote_protocol_packets
[PACKET_qSearch_memory
];
11446 /* Number of packet bytes used to encode the pattern;
11447 this could be more than PATTERN_LEN due to escape characters. */
11448 int escaped_pattern_len
;
11449 /* Amount of pattern that was encodable in the packet. */
11450 int used_pattern_len
;
11453 ULONGEST found_addr
;
11455 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
11457 return (target_read (this, TARGET_OBJECT_MEMORY
, NULL
, result
, addr
, len
)
11461 /* Don't go to the target if we don't have to. This is done before
11462 checking packet_config_support to avoid the possibility that a
11463 success for this edge case means the facility works in
11465 if (pattern_len
> search_space_len
)
11467 if (pattern_len
== 0)
11469 *found_addrp
= start_addr
;
11473 /* If we already know the packet isn't supported, fall back to the simple
11474 way of searching memory. */
11476 if (packet_config_support (packet
) == PACKET_DISABLE
)
11478 /* Target doesn't provided special support, fall back and use the
11479 standard support (copy memory and do the search here). */
11480 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11481 pattern
, pattern_len
, found_addrp
);
11484 /* Make sure the remote is pointing at the right process. */
11485 set_general_process ();
11487 /* Insert header. */
11488 i
= snprintf (rs
->buf
.data (), max_size
,
11489 "qSearch:memory:%s;%s;",
11490 phex_nz (start_addr
, addr_size
),
11491 phex_nz (search_space_len
, sizeof (search_space_len
)));
11492 max_size
-= (i
+ 1);
11494 /* Escape as much data as fits into rs->buf. */
11495 escaped_pattern_len
=
11496 remote_escape_output (pattern
, pattern_len
, 1,
11497 (gdb_byte
*) rs
->buf
.data () + i
,
11498 &used_pattern_len
, max_size
);
11500 /* Bail if the pattern is too large. */
11501 if (used_pattern_len
!= pattern_len
)
11502 error (_("Pattern is too large to transmit to remote target."));
11504 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11505 || getpkt_sane (&rs
->buf
, 0) < 0
11506 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11508 /* The request may not have worked because the command is not
11509 supported. If so, fall back to the simple way. */
11510 if (packet_config_support (packet
) == PACKET_DISABLE
)
11512 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11513 pattern
, pattern_len
, found_addrp
);
11518 if (rs
->buf
[0] == '0')
11520 else if (rs
->buf
[0] == '1')
11523 if (rs
->buf
[1] != ',')
11524 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11525 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11526 *found_addrp
= found_addr
;
11529 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11535 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11537 struct remote_state
*rs
= get_remote_state ();
11538 char *p
= rs
->buf
.data ();
11540 if (!rs
->remote_desc
)
11541 error (_("remote rcmd is only available after target open"));
11543 /* Send a NULL command across as an empty command. */
11544 if (command
== NULL
)
11547 /* The query prefix. */
11548 strcpy (rs
->buf
.data (), "qRcmd,");
11549 p
= strchr (rs
->buf
.data (), '\0');
11551 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11552 > get_remote_packet_size ())
11553 error (_("\"monitor\" command ``%s'' is too long."), command
);
11555 /* Encode the actual command. */
11556 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11558 if (putpkt (rs
->buf
) < 0)
11559 error (_("Communication problem with target."));
11561 /* get/display the response */
11566 /* XXX - see also remote_get_noisy_reply(). */
11567 QUIT
; /* Allow user to bail out with ^C. */
11569 if (getpkt_sane (&rs
->buf
, 0) == -1)
11571 /* Timeout. Continue to (try to) read responses.
11572 This is better than stopping with an error, assuming the stub
11573 is still executing the (long) monitor command.
11574 If needed, the user can interrupt gdb using C-c, obtaining
11575 an effect similar to stop on timeout. */
11578 buf
= rs
->buf
.data ();
11579 if (buf
[0] == '\0')
11580 error (_("Target does not support this command."));
11581 if (buf
[0] == 'O' && buf
[1] != 'K')
11583 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11586 if (strcmp (buf
, "OK") == 0)
11588 if (strlen (buf
) == 3 && buf
[0] == 'E'
11589 && isdigit (buf
[1]) && isdigit (buf
[2]))
11591 error (_("Protocol error with Rcmd"));
11593 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11595 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11597 fputc_unfiltered (c
, outbuf
);
11603 std::vector
<mem_region
>
11604 remote_target::memory_map ()
11606 std::vector
<mem_region
> result
;
11607 gdb::optional
<gdb::char_vector
> text
11608 = target_read_stralloc (current_inferior ()->top_target (),
11609 TARGET_OBJECT_MEMORY_MAP
, NULL
);
11612 result
= parse_memory_map (text
->data ());
11618 packet_command (const char *args
, int from_tty
)
11620 remote_target
*remote
= get_current_remote_target ();
11622 if (remote
== nullptr)
11623 error (_("command can only be used with remote target"));
11625 remote
->packet_command (args
, from_tty
);
11629 remote_target::packet_command (const char *args
, int from_tty
)
11632 error (_("remote-packet command requires packet text as argument"));
11634 puts_filtered ("sending: ");
11635 print_packet (args
);
11636 puts_filtered ("\n");
11639 remote_state
*rs
= get_remote_state ();
11641 getpkt (&rs
->buf
, 0);
11642 puts_filtered ("received: ");
11643 print_packet (rs
->buf
.data ());
11644 puts_filtered ("\n");
11648 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11650 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11652 static void threadset_test_cmd (char *cmd
, int tty
);
11654 static void threadalive_test (char *cmd
, int tty
);
11656 static void threadlist_test_cmd (char *cmd
, int tty
);
11658 int get_and_display_threadinfo (threadref
*ref
);
11660 static void threadinfo_test_cmd (char *cmd
, int tty
);
11662 static int thread_display_step (threadref
*ref
, void *context
);
11664 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11666 static void init_remote_threadtests (void);
11668 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11671 threadset_test_cmd (const char *cmd
, int tty
)
11673 int sample_thread
= SAMPLE_THREAD
;
11675 printf_filtered (_("Remote threadset test\n"));
11676 set_general_thread (sample_thread
);
11681 threadalive_test (const char *cmd
, int tty
)
11683 int sample_thread
= SAMPLE_THREAD
;
11684 int pid
= inferior_ptid
.pid ();
11685 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11687 if (remote_thread_alive (ptid
))
11688 printf_filtered ("PASS: Thread alive test\n");
11690 printf_filtered ("FAIL: Thread alive test\n");
11693 void output_threadid (char *title
, threadref
*ref
);
11696 output_threadid (char *title
, threadref
*ref
)
11700 pack_threadid (&hexid
[0], ref
); /* Convert thread id into hex. */
11702 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11706 threadlist_test_cmd (const char *cmd
, int tty
)
11709 threadref nextthread
;
11710 int done
, result_count
;
11711 threadref threadlist
[3];
11713 printf_filtered ("Remote Threadlist test\n");
11714 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11715 &result_count
, &threadlist
[0]))
11716 printf_filtered ("FAIL: threadlist test\n");
11719 threadref
*scan
= threadlist
;
11720 threadref
*limit
= scan
+ result_count
;
11722 while (scan
< limit
)
11723 output_threadid (" thread ", scan
++);
11728 display_thread_info (struct gdb_ext_thread_info
*info
)
11730 output_threadid ("Threadid: ", &info
->threadid
);
11731 printf_filtered ("Name: %s\n ", info
->shortname
);
11732 printf_filtered ("State: %s\n", info
->display
);
11733 printf_filtered ("other: %s\n\n", info
->more_display
);
11737 get_and_display_threadinfo (threadref
*ref
)
11741 struct gdb_ext_thread_info threadinfo
;
11743 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11744 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11745 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11746 display_thread_info (&threadinfo
);
11751 threadinfo_test_cmd (const char *cmd
, int tty
)
11753 int athread
= SAMPLE_THREAD
;
11757 int_to_threadref (&thread
, athread
);
11758 printf_filtered ("Remote Threadinfo test\n");
11759 if (!get_and_display_threadinfo (&thread
))
11760 printf_filtered ("FAIL cannot get thread info\n");
11764 thread_display_step (threadref
*ref
, void *context
)
11766 /* output_threadid(" threadstep ",ref); *//* simple test */
11767 return get_and_display_threadinfo (ref
);
11771 threadlist_update_test_cmd (const char *cmd
, int tty
)
11773 printf_filtered ("Remote Threadlist update test\n");
11774 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11778 init_remote_threadtests (void)
11780 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11781 _("Fetch and print the remote list of "
11782 "thread identifiers, one pkt only."));
11783 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11784 _("Fetch and display info about one thread."));
11785 add_com ("tset", class_obscure
, threadset_test_cmd
,
11786 _("Test setting to a different thread."));
11787 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11788 _("Iterate through updating all remote thread info."));
11789 add_com ("talive", class_obscure
, threadalive_test
,
11790 _("Remote thread alive test."));
11795 /* Convert a thread ID to a string. */
11798 remote_target::pid_to_str (ptid_t ptid
)
11800 struct remote_state
*rs
= get_remote_state ();
11802 if (ptid
== null_ptid
)
11803 return normal_pid_to_str (ptid
);
11804 else if (ptid
.is_pid ())
11806 /* Printing an inferior target id. */
11808 /* When multi-process extensions are off, there's no way in the
11809 remote protocol to know the remote process id, if there's any
11810 at all. There's one exception --- when we're connected with
11811 target extended-remote, and we manually attached to a process
11812 with "attach PID". We don't record anywhere a flag that
11813 allows us to distinguish that case from the case of
11814 connecting with extended-remote and the stub already being
11815 attached to a process, and reporting yes to qAttached, hence
11816 no smart special casing here. */
11817 if (!remote_multi_process_p (rs
))
11818 return "Remote target";
11820 return normal_pid_to_str (ptid
);
11824 if (magic_null_ptid
== ptid
)
11825 return "Thread <main>";
11826 else if (remote_multi_process_p (rs
))
11827 if (ptid
.lwp () == 0)
11828 return normal_pid_to_str (ptid
);
11830 return string_printf ("Thread %d.%ld",
11831 ptid
.pid (), ptid
.lwp ());
11833 return string_printf ("Thread %ld", ptid
.lwp ());
11837 /* Get the address of the thread local variable in OBJFILE which is
11838 stored at OFFSET within the thread local storage for thread PTID. */
11841 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11844 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11846 struct remote_state
*rs
= get_remote_state ();
11847 char *p
= rs
->buf
.data ();
11848 char *endp
= p
+ get_remote_packet_size ();
11849 enum packet_result result
;
11851 strcpy (p
, "qGetTLSAddr:");
11853 p
= write_ptid (p
, endp
, ptid
);
11855 p
+= hexnumstr (p
, offset
);
11857 p
+= hexnumstr (p
, lm
);
11861 getpkt (&rs
->buf
, 0);
11862 result
= packet_ok (rs
->buf
,
11863 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11864 if (result
== PACKET_OK
)
11868 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11871 else if (result
== PACKET_UNKNOWN
)
11872 throw_error (TLS_GENERIC_ERROR
,
11873 _("Remote target doesn't support qGetTLSAddr packet"));
11875 throw_error (TLS_GENERIC_ERROR
,
11876 _("Remote target failed to process qGetTLSAddr request"));
11879 throw_error (TLS_GENERIC_ERROR
,
11880 _("TLS not supported or disabled on this target"));
11885 /* Provide thread local base, i.e. Thread Information Block address.
11886 Returns 1 if ptid is found and thread_local_base is non zero. */
11889 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11891 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11893 struct remote_state
*rs
= get_remote_state ();
11894 char *p
= rs
->buf
.data ();
11895 char *endp
= p
+ get_remote_packet_size ();
11896 enum packet_result result
;
11898 strcpy (p
, "qGetTIBAddr:");
11900 p
= write_ptid (p
, endp
, ptid
);
11904 getpkt (&rs
->buf
, 0);
11905 result
= packet_ok (rs
->buf
,
11906 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11907 if (result
== PACKET_OK
)
11910 unpack_varlen_hex (rs
->buf
.data (), &val
);
11912 *addr
= (CORE_ADDR
) val
;
11915 else if (result
== PACKET_UNKNOWN
)
11916 error (_("Remote target doesn't support qGetTIBAddr packet"));
11918 error (_("Remote target failed to process qGetTIBAddr request"));
11921 error (_("qGetTIBAddr not supported or disabled on this target"));
11926 /* Support for inferring a target description based on the current
11927 architecture and the size of a 'g' packet. While the 'g' packet
11928 can have any size (since optional registers can be left off the
11929 end), some sizes are easily recognizable given knowledge of the
11930 approximate architecture. */
11932 struct remote_g_packet_guess
11934 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11941 const struct target_desc
*tdesc
;
11944 struct remote_g_packet_data
: public allocate_on_obstack
11946 std::vector
<remote_g_packet_guess
> guesses
;
11949 static struct gdbarch_data
*remote_g_packet_data_handle
;
11952 remote_g_packet_data_init (struct obstack
*obstack
)
11954 return new (obstack
) remote_g_packet_data
;
11958 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11959 const struct target_desc
*tdesc
)
11961 struct remote_g_packet_data
*data
11962 = ((struct remote_g_packet_data
*)
11963 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11965 gdb_assert (tdesc
!= NULL
);
11967 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11968 if (guess
.bytes
== bytes
)
11969 internal_error (__FILE__
, __LINE__
,
11970 _("Duplicate g packet description added for size %d"),
11973 data
->guesses
.emplace_back (bytes
, tdesc
);
11976 /* Return true if remote_read_description would do anything on this target
11977 and architecture, false otherwise. */
11980 remote_read_description_p (struct target_ops
*target
)
11982 struct remote_g_packet_data
*data
11983 = ((struct remote_g_packet_data
*)
11984 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11986 return !data
->guesses
.empty ();
11989 const struct target_desc
*
11990 remote_target::read_description ()
11992 struct remote_g_packet_data
*data
11993 = ((struct remote_g_packet_data
*)
11994 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11996 /* Do not try this during initial connection, when we do not know
11997 whether there is a running but stopped thread. */
11998 if (!target_has_execution () || inferior_ptid
== null_ptid
)
11999 return beneath ()->read_description ();
12001 if (!data
->guesses
.empty ())
12003 int bytes
= send_g_packet ();
12005 for (const remote_g_packet_guess
&guess
: data
->guesses
)
12006 if (guess
.bytes
== bytes
)
12007 return guess
.tdesc
;
12009 /* We discard the g packet. A minor optimization would be to
12010 hold on to it, and fill the register cache once we have selected
12011 an architecture, but it's too tricky to do safely. */
12014 return beneath ()->read_description ();
12017 /* Remote file transfer support. This is host-initiated I/O, not
12018 target-initiated; for target-initiated, see remote-fileio.c. */
12020 /* If *LEFT is at least the length of STRING, copy STRING to
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_string (char **buffer
, int *left
, const char *string
)
12027 int len
= strlen (string
);
12030 error (_("Packet too long for target."));
12032 memcpy (*buffer
, string
, len
);
12036 /* NUL-terminate the buffer as a convenience, if there is
12042 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
12043 *BUFFER, update *BUFFER to point to the new end of the buffer, and
12044 decrease *LEFT. Otherwise raise an error. */
12047 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
12050 if (2 * len
> *left
)
12051 error (_("Packet too long for target."));
12053 bin2hex (bytes
, *buffer
, len
);
12054 *buffer
+= 2 * len
;
12057 /* NUL-terminate the buffer as a convenience, if there is
12063 /* If *LEFT is large enough, convert VALUE to hex and add it to
12064 *BUFFER, update *BUFFER to point to the new end of the buffer, and
12065 decrease *LEFT. Otherwise raise an error. */
12068 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
12070 int len
= hexnumlen (value
);
12073 error (_("Packet too long for target."));
12075 hexnumstr (*buffer
, value
);
12079 /* NUL-terminate the buffer as a convenience, if there is
12085 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
12086 value, *REMOTE_ERRNO to the remote error number or zero if none
12087 was included, and *ATTACHMENT to point to the start of the annex
12088 if any. The length of the packet isn't needed here; there may
12089 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
12091 Return 0 if the packet could be parsed, -1 if it could not. If
12092 -1 is returned, the other variables may not be initialized. */
12095 remote_hostio_parse_result (const char *buffer
, int *retcode
,
12096 int *remote_errno
, const char **attachment
)
12101 *attachment
= NULL
;
12103 if (buffer
[0] != 'F')
12107 *retcode
= strtol (&buffer
[1], &p
, 16);
12108 if (errno
!= 0 || p
== &buffer
[1])
12111 /* Check for ",errno". */
12115 *remote_errno
= strtol (p
+ 1, &p2
, 16);
12116 if (errno
!= 0 || p
+ 1 == p2
)
12121 /* Check for ";attachment". If there is no attachment, the
12122 packet should end here. */
12125 *attachment
= p
+ 1;
12128 else if (*p
== '\0')
12134 /* Send a prepared I/O packet to the target and read its response.
12135 The prepared packet is in the global RS->BUF before this function
12136 is called, and the answer is there when we return.
12138 COMMAND_BYTES is the length of the request to send, which may include
12139 binary data. WHICH_PACKET is the packet configuration to check
12140 before attempting a packet. If an error occurs, *REMOTE_ERRNO
12141 is set to the error number and -1 is returned. Otherwise the value
12142 returned by the function is returned.
12144 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
12145 attachment is expected; an error will be reported if there's a
12146 mismatch. If one is found, *ATTACHMENT will be set to point into
12147 the packet buffer and *ATTACHMENT_LEN will be set to the
12148 attachment's length. */
12151 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
12152 int *remote_errno
, const char **attachment
,
12153 int *attachment_len
)
12155 struct remote_state
*rs
= get_remote_state ();
12156 int ret
, bytes_read
;
12157 const char *attachment_tmp
;
12159 if (packet_support (which_packet
) == PACKET_DISABLE
)
12161 *remote_errno
= FILEIO_ENOSYS
;
12165 putpkt_binary (rs
->buf
.data (), command_bytes
);
12166 bytes_read
= getpkt_sane (&rs
->buf
, 0);
12168 /* If it timed out, something is wrong. Don't try to parse the
12170 if (bytes_read
< 0)
12172 *remote_errno
= FILEIO_EINVAL
;
12176 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
12179 *remote_errno
= FILEIO_EINVAL
;
12181 case PACKET_UNKNOWN
:
12182 *remote_errno
= FILEIO_ENOSYS
;
12188 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
12191 *remote_errno
= FILEIO_EINVAL
;
12195 /* Make sure we saw an attachment if and only if we expected one. */
12196 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
12197 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
12199 *remote_errno
= FILEIO_EINVAL
;
12203 /* If an attachment was found, it must point into the packet buffer;
12204 work out how many bytes there were. */
12205 if (attachment_tmp
!= NULL
)
12207 *attachment
= attachment_tmp
;
12208 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
12214 /* See declaration.h. */
12217 readahead_cache::invalidate ()
12222 /* See declaration.h. */
12225 readahead_cache::invalidate_fd (int fd
)
12227 if (this->fd
== fd
)
12231 /* Set the filesystem remote_hostio functions that take FILENAME
12232 arguments will use. Return 0 on success, or -1 if an error
12233 occurs (and set *REMOTE_ERRNO). */
12236 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
12239 struct remote_state
*rs
= get_remote_state ();
12240 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
12241 char *p
= rs
->buf
.data ();
12242 int left
= get_remote_packet_size () - 1;
12246 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12249 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
12252 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
12254 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
12255 remote_buffer_add_string (&p
, &left
, arg
);
12257 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
12258 remote_errno
, NULL
, NULL
);
12260 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12264 rs
->fs_pid
= required_pid
;
12269 /* Implementation of to_fileio_open. */
12272 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
12273 int flags
, int mode
, int warn_if_slow
,
12276 struct remote_state
*rs
= get_remote_state ();
12277 char *p
= rs
->buf
.data ();
12278 int left
= get_remote_packet_size () - 1;
12282 static int warning_issued
= 0;
12284 printf_unfiltered (_("Reading %s from remote target...\n"),
12287 if (!warning_issued
)
12289 warning (_("File transfers from remote targets can be slow."
12290 " Use \"set sysroot\" to access files locally"
12292 warning_issued
= 1;
12296 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12299 remote_buffer_add_string (&p
, &left
, "vFile:open:");
12301 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12302 strlen (filename
));
12303 remote_buffer_add_string (&p
, &left
, ",");
12305 remote_buffer_add_int (&p
, &left
, flags
);
12306 remote_buffer_add_string (&p
, &left
, ",");
12308 remote_buffer_add_int (&p
, &left
, mode
);
12310 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
12311 remote_errno
, NULL
, NULL
);
12315 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
12316 int flags
, int mode
, int warn_if_slow
,
12319 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
12323 /* Implementation of to_fileio_pwrite. */
12326 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12327 ULONGEST offset
, int *remote_errno
)
12329 struct remote_state
*rs
= get_remote_state ();
12330 char *p
= rs
->buf
.data ();
12331 int left
= get_remote_packet_size ();
12334 rs
->readahead_cache
.invalidate_fd (fd
);
12336 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
12338 remote_buffer_add_int (&p
, &left
, fd
);
12339 remote_buffer_add_string (&p
, &left
, ",");
12341 remote_buffer_add_int (&p
, &left
, offset
);
12342 remote_buffer_add_string (&p
, &left
, ",");
12344 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
12345 (get_remote_packet_size ()
12346 - (p
- rs
->buf
.data ())));
12348 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
12349 remote_errno
, NULL
, NULL
);
12353 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12354 ULONGEST offset
, int *remote_errno
)
12356 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12359 /* Helper for the implementation of to_fileio_pread. Read the file
12360 from the remote side with vFile:pread. */
12363 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12364 ULONGEST offset
, int *remote_errno
)
12366 struct remote_state
*rs
= get_remote_state ();
12367 char *p
= rs
->buf
.data ();
12368 const char *attachment
;
12369 int left
= get_remote_packet_size ();
12370 int ret
, attachment_len
;
12373 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12375 remote_buffer_add_int (&p
, &left
, fd
);
12376 remote_buffer_add_string (&p
, &left
, ",");
12378 remote_buffer_add_int (&p
, &left
, len
);
12379 remote_buffer_add_string (&p
, &left
, ",");
12381 remote_buffer_add_int (&p
, &left
, offset
);
12383 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
12384 remote_errno
, &attachment
,
12390 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12392 if (read_len
!= ret
)
12393 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12398 /* See declaration.h. */
12401 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12405 && this->offset
<= offset
12406 && offset
< this->offset
+ this->bufsize
)
12408 ULONGEST max
= this->offset
+ this->bufsize
;
12410 if (offset
+ len
> max
)
12411 len
= max
- offset
;
12413 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12420 /* Implementation of to_fileio_pread. */
12423 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12424 ULONGEST offset
, int *remote_errno
)
12427 struct remote_state
*rs
= get_remote_state ();
12428 readahead_cache
*cache
= &rs
->readahead_cache
;
12430 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12433 cache
->hit_count
++;
12435 remote_debug_printf ("readahead cache hit %s",
12436 pulongest (cache
->hit_count
));
12440 cache
->miss_count
++;
12442 remote_debug_printf ("readahead cache miss %s",
12443 pulongest (cache
->miss_count
));
12446 cache
->offset
= offset
;
12447 cache
->bufsize
= get_remote_packet_size ();
12448 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12450 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12451 cache
->offset
, remote_errno
);
12454 cache
->invalidate_fd (fd
);
12458 cache
->bufsize
= ret
;
12459 return cache
->pread (fd
, read_buf
, len
, offset
);
12463 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12464 ULONGEST offset
, int *remote_errno
)
12466 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12469 /* Implementation of to_fileio_close. */
12472 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12474 struct remote_state
*rs
= get_remote_state ();
12475 char *p
= rs
->buf
.data ();
12476 int left
= get_remote_packet_size () - 1;
12478 rs
->readahead_cache
.invalidate_fd (fd
);
12480 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12482 remote_buffer_add_int (&p
, &left
, fd
);
12484 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12485 remote_errno
, NULL
, NULL
);
12489 remote_target::fileio_close (int fd
, int *remote_errno
)
12491 return remote_hostio_close (fd
, remote_errno
);
12494 /* Implementation of to_fileio_unlink. */
12497 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12500 struct remote_state
*rs
= get_remote_state ();
12501 char *p
= rs
->buf
.data ();
12502 int left
= get_remote_packet_size () - 1;
12504 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12507 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12509 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12510 strlen (filename
));
12512 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12513 remote_errno
, NULL
, NULL
);
12517 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12520 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12523 /* Implementation of to_fileio_readlink. */
12525 gdb::optional
<std::string
>
12526 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12529 struct remote_state
*rs
= get_remote_state ();
12530 char *p
= rs
->buf
.data ();
12531 const char *attachment
;
12532 int left
= get_remote_packet_size ();
12533 int len
, attachment_len
;
12536 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12539 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12541 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12542 strlen (filename
));
12544 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12545 remote_errno
, &attachment
,
12551 std::string
ret (len
, '\0');
12553 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12554 (gdb_byte
*) &ret
[0], len
);
12555 if (read_len
!= len
)
12556 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12561 /* Implementation of to_fileio_fstat. */
12564 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12566 struct remote_state
*rs
= get_remote_state ();
12567 char *p
= rs
->buf
.data ();
12568 int left
= get_remote_packet_size ();
12569 int attachment_len
, ret
;
12570 const char *attachment
;
12571 struct fio_stat fst
;
12574 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12576 remote_buffer_add_int (&p
, &left
, fd
);
12578 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12579 remote_errno
, &attachment
,
12583 if (*remote_errno
!= FILEIO_ENOSYS
)
12586 /* Strictly we should return -1, ENOSYS here, but when
12587 "set sysroot remote:" was implemented in August 2008
12588 BFD's need for a stat function was sidestepped with
12589 this hack. This was not remedied until March 2015
12590 so we retain the previous behavior to avoid breaking
12593 Note that the memset is a March 2015 addition; older
12594 GDBs set st_size *and nothing else* so the structure
12595 would have garbage in all other fields. This might
12596 break something but retaining the previous behavior
12597 here would be just too wrong. */
12599 memset (st
, 0, sizeof (struct stat
));
12600 st
->st_size
= INT_MAX
;
12604 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12605 (gdb_byte
*) &fst
, sizeof (fst
));
12607 if (read_len
!= ret
)
12608 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12610 if (read_len
!= sizeof (fst
))
12611 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12612 read_len
, (int) sizeof (fst
));
12614 remote_fileio_to_host_stat (&fst
, st
);
12619 /* Implementation of to_filesystem_is_local. */
12622 remote_target::filesystem_is_local ()
12624 /* Valgrind GDB presents itself as a remote target but works
12625 on the local filesystem: it does not implement remote get
12626 and users are not expected to set a sysroot. To handle
12627 this case we treat the remote filesystem as local if the
12628 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12629 does not support vFile:open. */
12630 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12632 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12634 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12636 int fd
, remote_errno
;
12638 /* Try opening a file to probe support. The supplied
12639 filename is irrelevant, we only care about whether
12640 the stub recognizes the packet or not. */
12641 fd
= remote_hostio_open (NULL
, "just probing",
12642 FILEIO_O_RDONLY
, 0700, 0,
12646 remote_hostio_close (fd
, &remote_errno
);
12648 ps
= packet_support (PACKET_vFile_open
);
12651 if (ps
== PACKET_DISABLE
)
12653 static int warning_issued
= 0;
12655 if (!warning_issued
)
12657 warning (_("remote target does not support file"
12658 " transfer, attempting to access files"
12659 " from local filesystem."));
12660 warning_issued
= 1;
12671 remote_fileio_errno_to_host (int errnum
)
12677 case FILEIO_ENOENT
:
12685 case FILEIO_EACCES
:
12687 case FILEIO_EFAULT
:
12691 case FILEIO_EEXIST
:
12693 case FILEIO_ENODEV
:
12695 case FILEIO_ENOTDIR
:
12697 case FILEIO_EISDIR
:
12699 case FILEIO_EINVAL
:
12701 case FILEIO_ENFILE
:
12703 case FILEIO_EMFILE
:
12707 case FILEIO_ENOSPC
:
12709 case FILEIO_ESPIPE
:
12713 case FILEIO_ENOSYS
:
12715 case FILEIO_ENAMETOOLONG
:
12716 return ENAMETOOLONG
;
12722 remote_hostio_error (int errnum
)
12724 int host_error
= remote_fileio_errno_to_host (errnum
);
12726 if (host_error
== -1)
12727 error (_("Unknown remote I/O error %d"), errnum
);
12729 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12732 /* A RAII wrapper around a remote file descriptor. */
12734 class scoped_remote_fd
12737 scoped_remote_fd (remote_target
*remote
, int fd
)
12738 : m_remote (remote
), m_fd (fd
)
12742 ~scoped_remote_fd ()
12749 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12753 /* Swallow exception before it escapes the dtor. If
12754 something goes wrong, likely the connection is gone,
12755 and there's nothing else that can be done. */
12760 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12762 /* Release ownership of the file descriptor, and return it. */
12763 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12770 /* Return the owned file descriptor. */
12771 int get () const noexcept
12777 /* The remote target. */
12778 remote_target
*m_remote
;
12780 /* The owned remote I/O file descriptor. */
12785 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12787 remote_target
*remote
= get_current_remote_target ();
12789 if (remote
== nullptr)
12790 error (_("command can only be used with remote target"));
12792 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12796 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12799 int retcode
, remote_errno
, bytes
, io_size
;
12800 int bytes_in_buffer
;
12804 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12806 perror_with_name (local_file
);
12808 scoped_remote_fd fd
12809 (this, remote_hostio_open (NULL
,
12810 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12812 0700, 0, &remote_errno
));
12813 if (fd
.get () == -1)
12814 remote_hostio_error (remote_errno
);
12816 /* Send up to this many bytes at once. They won't all fit in the
12817 remote packet limit, so we'll transfer slightly fewer. */
12818 io_size
= get_remote_packet_size ();
12819 gdb::byte_vector
buffer (io_size
);
12821 bytes_in_buffer
= 0;
12824 while (bytes_in_buffer
|| !saw_eof
)
12828 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12829 io_size
- bytes_in_buffer
,
12833 if (ferror (file
.get ()))
12834 error (_("Error reading %s."), local_file
);
12837 /* EOF. Unless there is something still in the
12838 buffer from the last iteration, we are done. */
12840 if (bytes_in_buffer
== 0)
12848 bytes
+= bytes_in_buffer
;
12849 bytes_in_buffer
= 0;
12851 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12852 offset
, &remote_errno
);
12855 remote_hostio_error (remote_errno
);
12856 else if (retcode
== 0)
12857 error (_("Remote write of %d bytes returned 0!"), bytes
);
12858 else if (retcode
< bytes
)
12860 /* Short write. Save the rest of the read data for the next
12862 bytes_in_buffer
= bytes
- retcode
;
12863 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12869 if (remote_hostio_close (fd
.release (), &remote_errno
))
12870 remote_hostio_error (remote_errno
);
12873 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12877 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12879 remote_target
*remote
= get_current_remote_target ();
12881 if (remote
== nullptr)
12882 error (_("command can only be used with remote target"));
12884 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12888 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12891 int remote_errno
, bytes
, io_size
;
12894 scoped_remote_fd fd
12895 (this, remote_hostio_open (NULL
,
12896 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12898 if (fd
.get () == -1)
12899 remote_hostio_error (remote_errno
);
12901 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12903 perror_with_name (local_file
);
12905 /* Send up to this many bytes at once. They won't all fit in the
12906 remote packet limit, so we'll transfer slightly fewer. */
12907 io_size
= get_remote_packet_size ();
12908 gdb::byte_vector
buffer (io_size
);
12913 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12916 /* Success, but no bytes, means end-of-file. */
12919 remote_hostio_error (remote_errno
);
12923 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12925 perror_with_name (local_file
);
12928 if (remote_hostio_close (fd
.release (), &remote_errno
))
12929 remote_hostio_error (remote_errno
);
12932 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12936 remote_file_delete (const char *remote_file
, int from_tty
)
12938 remote_target
*remote
= get_current_remote_target ();
12940 if (remote
== nullptr)
12941 error (_("command can only be used with remote target"));
12943 remote
->remote_file_delete (remote_file
, from_tty
);
12947 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12949 int retcode
, remote_errno
;
12951 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12953 remote_hostio_error (remote_errno
);
12956 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12960 remote_put_command (const char *args
, int from_tty
)
12963 error_no_arg (_("file to put"));
12965 gdb_argv
argv (args
);
12966 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12967 error (_("Invalid parameters to remote put"));
12969 remote_file_put (argv
[0], argv
[1], from_tty
);
12973 remote_get_command (const char *args
, int from_tty
)
12976 error_no_arg (_("file to get"));
12978 gdb_argv
argv (args
);
12979 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12980 error (_("Invalid parameters to remote get"));
12982 remote_file_get (argv
[0], argv
[1], from_tty
);
12986 remote_delete_command (const char *args
, int from_tty
)
12989 error_no_arg (_("file to delete"));
12991 gdb_argv
argv (args
);
12992 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12993 error (_("Invalid parameters to remote delete"));
12995 remote_file_delete (argv
[0], from_tty
);
12999 remote_target::can_execute_reverse ()
13001 if (packet_support (PACKET_bs
) == PACKET_ENABLE
13002 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
13009 remote_target::supports_non_stop ()
13015 remote_target::supports_disable_randomization ()
13017 /* Only supported in extended mode. */
13022 remote_target::supports_multi_process ()
13024 struct remote_state
*rs
= get_remote_state ();
13026 return remote_multi_process_p (rs
);
13030 remote_supports_cond_tracepoints ()
13032 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
13036 remote_target::supports_evaluation_of_breakpoint_conditions ()
13038 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
13042 remote_supports_fast_tracepoints ()
13044 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
13048 remote_supports_static_tracepoints ()
13050 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
13054 remote_supports_install_in_trace ()
13056 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
13060 remote_target::supports_enable_disable_tracepoint ()
13062 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
13067 remote_target::supports_string_tracing ()
13069 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
13073 remote_target::can_run_breakpoint_commands ()
13075 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
13079 remote_target::trace_init ()
13081 struct remote_state
*rs
= get_remote_state ();
13084 remote_get_noisy_reply ();
13085 if (strcmp (rs
->buf
.data (), "OK") != 0)
13086 error (_("Target does not support this command."));
13089 /* Recursive routine to walk through command list including loops, and
13090 download packets for each command. */
13093 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
13094 struct command_line
*cmds
)
13096 struct remote_state
*rs
= get_remote_state ();
13097 struct command_line
*cmd
;
13099 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
13101 QUIT
; /* Allow user to bail out with ^C. */
13102 strcpy (rs
->buf
.data (), "QTDPsrc:");
13103 encode_source_string (num
, addr
, "cmd", cmd
->line
,
13104 rs
->buf
.data () + strlen (rs
->buf
.data ()),
13105 rs
->buf
.size () - strlen (rs
->buf
.data ()));
13107 remote_get_noisy_reply ();
13108 if (strcmp (rs
->buf
.data (), "OK"))
13109 warning (_("Target does not support source download."));
13111 if (cmd
->control_type
== while_control
13112 || cmd
->control_type
== while_stepping_control
)
13114 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
13116 QUIT
; /* Allow user to bail out with ^C. */
13117 strcpy (rs
->buf
.data (), "QTDPsrc:");
13118 encode_source_string (num
, addr
, "cmd", "end",
13119 rs
->buf
.data () + strlen (rs
->buf
.data ()),
13120 rs
->buf
.size () - strlen (rs
->buf
.data ()));
13122 remote_get_noisy_reply ();
13123 if (strcmp (rs
->buf
.data (), "OK"))
13124 warning (_("Target does not support source download."));
13130 remote_target::download_tracepoint (struct bp_location
*loc
)
13134 std::vector
<std::string
> tdp_actions
;
13135 std::vector
<std::string
> stepping_actions
;
13137 struct breakpoint
*b
= loc
->owner
;
13138 struct tracepoint
*t
= (struct tracepoint
*) b
;
13139 struct remote_state
*rs
= get_remote_state ();
13141 const char *err_msg
= _("Tracepoint packet too large for target.");
13144 /* We use a buffer other than rs->buf because we'll build strings
13145 across multiple statements, and other statements in between could
13147 gdb::char_vector
buf (get_remote_packet_size ());
13149 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
13151 tpaddr
= loc
->address
;
13152 strcpy (addrbuf
, phex (tpaddr
, sizeof (CORE_ADDR
)));
13153 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
13154 b
->number
, addrbuf
, /* address */
13155 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
13156 t
->step_count
, t
->pass_count
);
13158 if (ret
< 0 || ret
>= buf
.size ())
13159 error ("%s", err_msg
);
13161 /* Fast tracepoints are mostly handled by the target, but we can
13162 tell the target how big of an instruction block should be moved
13164 if (b
->type
== bp_fast_tracepoint
)
13166 /* Only test for support at download time; we may not know
13167 target capabilities at definition time. */
13168 if (remote_supports_fast_tracepoints ())
13170 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
13173 size_left
= buf
.size () - strlen (buf
.data ());
13174 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13176 gdb_insn_length (loc
->gdbarch
, tpaddr
));
13178 if (ret
< 0 || ret
>= size_left
)
13179 error ("%s", err_msg
);
13182 /* If it passed validation at definition but fails now,
13183 something is very wrong. */
13184 internal_error (__FILE__
, __LINE__
,
13185 _("Fast tracepoint not "
13186 "valid during download"));
13189 /* Fast tracepoints are functionally identical to regular
13190 tracepoints, so don't take lack of support as a reason to
13191 give up on the trace run. */
13192 warning (_("Target does not support fast tracepoints, "
13193 "downloading %d as regular tracepoint"), b
->number
);
13195 else if (b
->type
== bp_static_tracepoint
)
13197 /* Only test for support at download time; we may not know
13198 target capabilities at definition time. */
13199 if (remote_supports_static_tracepoints ())
13201 struct static_tracepoint_marker marker
;
13203 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
13205 size_left
= buf
.size () - strlen (buf
.data ());
13206 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13209 if (ret
< 0 || ret
>= size_left
)
13210 error ("%s", err_msg
);
13213 error (_("Static tracepoint not valid during download"));
13216 /* Fast tracepoints are functionally identical to regular
13217 tracepoints, so don't take lack of support as a reason
13218 to give up on the trace run. */
13219 error (_("Target does not support static tracepoints"));
13221 /* If the tracepoint has a conditional, make it into an agent
13222 expression and append to the definition. */
13225 /* Only test support at download time, we may not know target
13226 capabilities at definition time. */
13227 if (remote_supports_cond_tracepoints ())
13229 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
13232 size_left
= buf
.size () - strlen (buf
.data ());
13234 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13235 size_left
, ":X%x,", aexpr
->len
);
13237 if (ret
< 0 || ret
>= size_left
)
13238 error ("%s", err_msg
);
13240 size_left
= buf
.size () - strlen (buf
.data ());
13242 /* Two bytes to encode each aexpr byte, plus the terminating
13244 if (aexpr
->len
* 2 + 1 > size_left
)
13245 error ("%s", err_msg
);
13247 pkt
= buf
.data () + strlen (buf
.data ());
13249 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
13250 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
13254 warning (_("Target does not support conditional tracepoints, "
13255 "ignoring tp %d cond"), b
->number
);
13258 if (b
->commands
|| *default_collect
)
13260 size_left
= buf
.size () - strlen (buf
.data ());
13262 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13265 if (ret
< 0 || ret
>= size_left
)
13266 error ("%s", err_msg
);
13269 putpkt (buf
.data ());
13270 remote_get_noisy_reply ();
13271 if (strcmp (rs
->buf
.data (), "OK"))
13272 error (_("Target does not support tracepoints."));
13274 /* do_single_steps (t); */
13275 for (auto action_it
= tdp_actions
.begin ();
13276 action_it
!= tdp_actions
.end (); action_it
++)
13278 QUIT
; /* Allow user to bail out with ^C. */
13280 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
13281 || !stepping_actions
.empty ());
13283 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
13284 b
->number
, addrbuf
, /* address */
13285 action_it
->c_str (),
13286 has_more
? '-' : 0);
13288 if (ret
< 0 || ret
>= buf
.size ())
13289 error ("%s", err_msg
);
13291 putpkt (buf
.data ());
13292 remote_get_noisy_reply ();
13293 if (strcmp (rs
->buf
.data (), "OK"))
13294 error (_("Error on target while setting tracepoints."));
13297 for (auto action_it
= stepping_actions
.begin ();
13298 action_it
!= stepping_actions
.end (); action_it
++)
13300 QUIT
; /* Allow user to bail out with ^C. */
13302 bool is_first
= action_it
== stepping_actions
.begin ();
13303 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
13305 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
13306 b
->number
, addrbuf
, /* address */
13307 is_first
? "S" : "",
13308 action_it
->c_str (),
13309 has_more
? "-" : "");
13311 if (ret
< 0 || ret
>= buf
.size ())
13312 error ("%s", err_msg
);
13314 putpkt (buf
.data ());
13315 remote_get_noisy_reply ();
13316 if (strcmp (rs
->buf
.data (), "OK"))
13317 error (_("Error on target while setting tracepoints."));
13320 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
13322 if (b
->location
!= NULL
)
13324 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13326 if (ret
< 0 || ret
>= buf
.size ())
13327 error ("%s", err_msg
);
13329 encode_source_string (b
->number
, loc
->address
, "at",
13330 event_location_to_string (b
->location
.get ()),
13331 buf
.data () + strlen (buf
.data ()),
13332 buf
.size () - strlen (buf
.data ()));
13333 putpkt (buf
.data ());
13334 remote_get_noisy_reply ();
13335 if (strcmp (rs
->buf
.data (), "OK"))
13336 warning (_("Target does not support source download."));
13338 if (b
->cond_string
)
13340 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13342 if (ret
< 0 || ret
>= buf
.size ())
13343 error ("%s", err_msg
);
13345 encode_source_string (b
->number
, loc
->address
,
13346 "cond", b
->cond_string
,
13347 buf
.data () + strlen (buf
.data ()),
13348 buf
.size () - strlen (buf
.data ()));
13349 putpkt (buf
.data ());
13350 remote_get_noisy_reply ();
13351 if (strcmp (rs
->buf
.data (), "OK"))
13352 warning (_("Target does not support source download."));
13354 remote_download_command_source (b
->number
, loc
->address
,
13355 breakpoint_commands (b
));
13360 remote_target::can_download_tracepoint ()
13362 struct remote_state
*rs
= get_remote_state ();
13363 struct trace_status
*ts
;
13366 /* Don't try to install tracepoints until we've relocated our
13367 symbols, and fetched and merged the target's tracepoint list with
13369 if (rs
->starting_up
)
13372 ts
= current_trace_status ();
13373 status
= get_trace_status (ts
);
13375 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13378 /* If we are in a tracing experiment, but remote stub doesn't support
13379 installing tracepoint in trace, we have to return. */
13380 if (!remote_supports_install_in_trace ())
13388 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13390 struct remote_state
*rs
= get_remote_state ();
13393 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13394 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13396 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13397 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13398 >= get_remote_packet_size ())
13399 error (_("Trace state variable name too long for tsv definition packet"));
13400 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13403 remote_get_noisy_reply ();
13404 if (rs
->buf
[0] == '\0')
13405 error (_("Target does not support this command."));
13406 if (strcmp (rs
->buf
.data (), "OK") != 0)
13407 error (_("Error on target while downloading trace state variable."));
13411 remote_target::enable_tracepoint (struct bp_location
*location
)
13413 struct remote_state
*rs
= get_remote_state ();
13415 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13416 location
->owner
->number
,
13417 phex (location
->address
, sizeof (CORE_ADDR
)));
13419 remote_get_noisy_reply ();
13420 if (rs
->buf
[0] == '\0')
13421 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13422 if (strcmp (rs
->buf
.data (), "OK") != 0)
13423 error (_("Error on target while enabling tracepoint."));
13427 remote_target::disable_tracepoint (struct bp_location
*location
)
13429 struct remote_state
*rs
= get_remote_state ();
13431 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13432 location
->owner
->number
,
13433 phex (location
->address
, sizeof (CORE_ADDR
)));
13435 remote_get_noisy_reply ();
13436 if (rs
->buf
[0] == '\0')
13437 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13438 if (strcmp (rs
->buf
.data (), "OK") != 0)
13439 error (_("Error on target while disabling tracepoint."));
13443 remote_target::trace_set_readonly_regions ()
13446 bfd_size_type size
;
13451 if (!current_program_space
->exec_bfd ())
13452 return; /* No information to give. */
13454 struct remote_state
*rs
= get_remote_state ();
13456 strcpy (rs
->buf
.data (), "QTro");
13457 offset
= strlen (rs
->buf
.data ());
13458 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
13460 char tmp1
[40], tmp2
[40];
13463 if ((s
->flags
& SEC_LOAD
) == 0 ||
13464 /* (s->flags & SEC_CODE) == 0 || */
13465 (s
->flags
& SEC_READONLY
) == 0)
13469 vma
= bfd_section_vma (s
);
13470 size
= bfd_section_size (s
);
13471 sprintf_vma (tmp1
, vma
);
13472 sprintf_vma (tmp2
, vma
+ size
);
13473 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13474 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13476 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13478 Too many sections for read-only sections definition packet."));
13481 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13483 offset
+= sec_length
;
13488 getpkt (&rs
->buf
, 0);
13493 remote_target::trace_start ()
13495 struct remote_state
*rs
= get_remote_state ();
13497 putpkt ("QTStart");
13498 remote_get_noisy_reply ();
13499 if (rs
->buf
[0] == '\0')
13500 error (_("Target does not support this command."));
13501 if (strcmp (rs
->buf
.data (), "OK") != 0)
13502 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13506 remote_target::get_trace_status (struct trace_status
*ts
)
13508 /* Initialize it just to avoid a GCC false warning. */
13510 enum packet_result result
;
13511 struct remote_state
*rs
= get_remote_state ();
13513 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13516 /* FIXME we need to get register block size some other way. */
13517 trace_regblock_size
13518 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13520 putpkt ("qTStatus");
13524 p
= remote_get_noisy_reply ();
13526 catch (const gdb_exception_error
&ex
)
13528 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13530 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13536 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13538 /* If the remote target doesn't do tracing, flag it. */
13539 if (result
== PACKET_UNKNOWN
)
13542 /* We're working with a live target. */
13543 ts
->filename
= NULL
;
13546 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13548 /* Function 'parse_trace_status' sets default value of each field of
13549 'ts' at first, so we don't have to do it here. */
13550 parse_trace_status (p
, ts
);
13552 return ts
->running
;
13556 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13557 struct uploaded_tp
*utp
)
13559 struct remote_state
*rs
= get_remote_state ();
13561 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13562 size_t size
= get_remote_packet_size ();
13567 tp
->traceframe_usage
= 0;
13568 for (bp_location
*loc
: tp
->locations ())
13570 /* If the tracepoint was never downloaded, don't go asking for
13572 if (tp
->number_on_target
== 0)
13574 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13575 phex_nz (loc
->address
, 0));
13577 reply
= remote_get_noisy_reply ();
13578 if (reply
&& *reply
)
13581 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13587 utp
->hit_count
= 0;
13588 utp
->traceframe_usage
= 0;
13589 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13590 phex_nz (utp
->addr
, 0));
13592 reply
= remote_get_noisy_reply ();
13593 if (reply
&& *reply
)
13596 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13602 remote_target::trace_stop ()
13604 struct remote_state
*rs
= get_remote_state ();
13607 remote_get_noisy_reply ();
13608 if (rs
->buf
[0] == '\0')
13609 error (_("Target does not support this command."));
13610 if (strcmp (rs
->buf
.data (), "OK") != 0)
13611 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13615 remote_target::trace_find (enum trace_find_type type
, int num
,
13616 CORE_ADDR addr1
, CORE_ADDR addr2
,
13619 struct remote_state
*rs
= get_remote_state ();
13620 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13622 int target_frameno
= -1, target_tracept
= -1;
13624 /* Lookups other than by absolute frame number depend on the current
13625 trace selected, so make sure it is correct on the remote end
13627 if (type
!= tfind_number
)
13628 set_remote_traceframe ();
13630 p
= rs
->buf
.data ();
13631 strcpy (p
, "QTFrame:");
13632 p
= strchr (p
, '\0');
13636 xsnprintf (p
, endbuf
- p
, "%x", num
);
13639 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13642 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13645 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13646 phex_nz (addr2
, 0));
13648 case tfind_outside
:
13649 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13650 phex_nz (addr2
, 0));
13653 error (_("Unknown trace find type %d"), type
);
13657 reply
= remote_get_noisy_reply ();
13658 if (*reply
== '\0')
13659 error (_("Target does not support this command."));
13661 while (reply
&& *reply
)
13666 target_frameno
= (int) strtol (p
, &reply
, 16);
13668 error (_("Unable to parse trace frame number"));
13669 /* Don't update our remote traceframe number cache on failure
13670 to select a remote traceframe. */
13671 if (target_frameno
== -1)
13676 target_tracept
= (int) strtol (p
, &reply
, 16);
13678 error (_("Unable to parse tracepoint number"));
13680 case 'O': /* "OK"? */
13681 if (reply
[1] == 'K' && reply
[2] == '\0')
13684 error (_("Bogus reply from target: %s"), reply
);
13687 error (_("Bogus reply from target: %s"), reply
);
13690 *tpp
= target_tracept
;
13692 rs
->remote_traceframe_number
= target_frameno
;
13693 return target_frameno
;
13697 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13699 struct remote_state
*rs
= get_remote_state ();
13703 set_remote_traceframe ();
13705 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13707 reply
= remote_get_noisy_reply ();
13708 if (reply
&& *reply
)
13712 unpack_varlen_hex (reply
+ 1, &uval
);
13713 *val
= (LONGEST
) uval
;
13721 remote_target::save_trace_data (const char *filename
)
13723 struct remote_state
*rs
= get_remote_state ();
13726 p
= rs
->buf
.data ();
13727 strcpy (p
, "QTSave:");
13729 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13730 >= get_remote_packet_size ())
13731 error (_("Remote file name too long for trace save packet"));
13732 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13735 reply
= remote_get_noisy_reply ();
13736 if (*reply
== '\0')
13737 error (_("Target does not support this command."));
13738 if (strcmp (reply
, "OK") != 0)
13739 error (_("Bogus reply from target: %s"), reply
);
13743 /* This is basically a memory transfer, but needs to be its own packet
13744 because we don't know how the target actually organizes its trace
13745 memory, plus we want to be able to ask for as much as possible, but
13746 not be unhappy if we don't get as much as we ask for. */
13749 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13751 struct remote_state
*rs
= get_remote_state ();
13756 p
= rs
->buf
.data ();
13757 strcpy (p
, "qTBuffer:");
13759 p
+= hexnumstr (p
, offset
);
13761 p
+= hexnumstr (p
, len
);
13765 reply
= remote_get_noisy_reply ();
13766 if (reply
&& *reply
)
13768 /* 'l' by itself means we're at the end of the buffer and
13769 there is nothing more to get. */
13773 /* Convert the reply into binary. Limit the number of bytes to
13774 convert according to our passed-in buffer size, rather than
13775 what was returned in the packet; if the target is
13776 unexpectedly generous and gives us a bigger reply than we
13777 asked for, we don't want to crash. */
13778 rslt
= hex2bin (reply
, buf
, len
);
13782 /* Something went wrong, flag as an error. */
13787 remote_target::set_disconnected_tracing (int val
)
13789 struct remote_state
*rs
= get_remote_state ();
13791 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13795 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13796 "QTDisconnected:%x", val
);
13798 reply
= remote_get_noisy_reply ();
13799 if (*reply
== '\0')
13800 error (_("Target does not support this command."));
13801 if (strcmp (reply
, "OK") != 0)
13802 error (_("Bogus reply from target: %s"), reply
);
13805 warning (_("Target does not support disconnected tracing."));
13809 remote_target::core_of_thread (ptid_t ptid
)
13811 thread_info
*info
= find_thread_ptid (this, ptid
);
13813 if (info
!= NULL
&& info
->priv
!= NULL
)
13814 return get_remote_thread_info (info
)->core
;
13820 remote_target::set_circular_trace_buffer (int val
)
13822 struct remote_state
*rs
= get_remote_state ();
13825 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13826 "QTBuffer:circular:%x", val
);
13828 reply
= remote_get_noisy_reply ();
13829 if (*reply
== '\0')
13830 error (_("Target does not support this command."));
13831 if (strcmp (reply
, "OK") != 0)
13832 error (_("Bogus reply from target: %s"), reply
);
13836 remote_target::traceframe_info ()
13838 gdb::optional
<gdb::char_vector
> text
13839 = target_read_stralloc (current_inferior ()->top_target (),
13840 TARGET_OBJECT_TRACEFRAME_INFO
,
13843 return parse_traceframe_info (text
->data ());
13848 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13849 instruction on which a fast tracepoint may be placed. Returns -1
13850 if the packet is not supported, and 0 if the minimum instruction
13851 length is unknown. */
13854 remote_target::get_min_fast_tracepoint_insn_len ()
13856 struct remote_state
*rs
= get_remote_state ();
13859 /* If we're not debugging a process yet, the IPA can't be
13861 if (!target_has_execution ())
13864 /* Make sure the remote is pointing at the right process. */
13865 set_general_process ();
13867 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13869 reply
= remote_get_noisy_reply ();
13870 if (*reply
== '\0')
13874 ULONGEST min_insn_len
;
13876 unpack_varlen_hex (reply
, &min_insn_len
);
13878 return (int) min_insn_len
;
13883 remote_target::set_trace_buffer_size (LONGEST val
)
13885 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13887 struct remote_state
*rs
= get_remote_state ();
13888 char *buf
= rs
->buf
.data ();
13889 char *endbuf
= buf
+ get_remote_packet_size ();
13890 enum packet_result result
;
13892 gdb_assert (val
>= 0 || val
== -1);
13893 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13894 /* Send -1 as literal "-1" to avoid host size dependency. */
13898 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13901 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13904 remote_get_noisy_reply ();
13905 result
= packet_ok (rs
->buf
,
13906 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13908 if (result
!= PACKET_OK
)
13909 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13914 remote_target::set_trace_notes (const char *user
, const char *notes
,
13915 const char *stop_notes
)
13917 struct remote_state
*rs
= get_remote_state ();
13919 char *buf
= rs
->buf
.data ();
13920 char *endbuf
= buf
+ get_remote_packet_size ();
13923 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13926 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13927 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13933 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13934 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13940 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13941 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13945 /* Ensure the buffer is terminated. */
13949 reply
= remote_get_noisy_reply ();
13950 if (*reply
== '\0')
13953 if (strcmp (reply
, "OK") != 0)
13954 error (_("Bogus reply from target: %s"), reply
);
13960 remote_target::use_agent (bool use
)
13962 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13964 struct remote_state
*rs
= get_remote_state ();
13966 /* If the stub supports QAgent. */
13967 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13969 getpkt (&rs
->buf
, 0);
13971 if (strcmp (rs
->buf
.data (), "OK") == 0)
13982 remote_target::can_use_agent ()
13984 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13987 struct btrace_target_info
13989 /* The ptid of the traced thread. */
13992 /* The obtained branch trace configuration. */
13993 struct btrace_config conf
;
13996 /* Reset our idea of our target's btrace configuration. */
13999 remote_btrace_reset (remote_state
*rs
)
14001 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
14004 /* Synchronize the configuration with the target. */
14007 remote_target::btrace_sync_conf (const btrace_config
*conf
)
14009 struct packet_config
*packet
;
14010 struct remote_state
*rs
;
14011 char *buf
, *pos
, *endbuf
;
14013 rs
= get_remote_state ();
14014 buf
= rs
->buf
.data ();
14015 endbuf
= buf
+ get_remote_packet_size ();
14017 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
14018 if (packet_config_support (packet
) == PACKET_ENABLE
14019 && conf
->bts
.size
!= rs
->btrace_config
.bts
.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 BTS buffer size: %s"), buf
+ 2);
14033 error (_("Failed to configure the BTS buffer size."));
14036 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
14039 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
14040 if (packet_config_support (packet
) == PACKET_ENABLE
14041 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
14044 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
14048 getpkt (&rs
->buf
, 0);
14050 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
14052 if (buf
[0] == 'E' && buf
[1] == '.')
14053 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
14055 error (_("Failed to configure the trace buffer size."));
14058 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
14062 /* Read the current thread's btrace configuration from the target and
14063 store it into CONF. */
14066 btrace_read_config (struct btrace_config
*conf
)
14068 gdb::optional
<gdb::char_vector
> xml
14069 = target_read_stralloc (current_inferior ()->top_target (),
14070 TARGET_OBJECT_BTRACE_CONF
, "");
14072 parse_xml_btrace_conf (conf
, xml
->data ());
14075 /* Maybe reopen target btrace. */
14078 remote_target::remote_btrace_maybe_reopen ()
14080 struct remote_state
*rs
= get_remote_state ();
14081 int btrace_target_pushed
= 0;
14082 #if !defined (HAVE_LIBIPT)
14086 /* Don't bother walking the entirety of the remote thread list when
14087 we know the feature isn't supported by the remote. */
14088 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
14091 scoped_restore_current_thread restore_thread
;
14093 for (thread_info
*tp
: all_non_exited_threads (this))
14095 set_general_thread (tp
->ptid
);
14097 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
14098 btrace_read_config (&rs
->btrace_config
);
14100 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
14103 #if !defined (HAVE_LIBIPT)
14104 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
14109 warning (_("Target is recording using Intel Processor Trace "
14110 "but support was disabled at compile time."));
14115 #endif /* !defined (HAVE_LIBIPT) */
14117 /* Push target, once, but before anything else happens. This way our
14118 changes to the threads will be cleaned up by unpushing the target
14119 in case btrace_read_config () throws. */
14120 if (!btrace_target_pushed
)
14122 btrace_target_pushed
= 1;
14123 record_btrace_push_target ();
14124 printf_filtered (_("Target is recording using %s.\n"),
14125 btrace_format_string (rs
->btrace_config
.format
));
14128 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
14129 tp
->btrace
.target
->ptid
= tp
->ptid
;
14130 tp
->btrace
.target
->conf
= rs
->btrace_config
;
14134 /* Enable branch tracing. */
14136 struct btrace_target_info
*
14137 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
14139 struct btrace_target_info
*tinfo
= NULL
;
14140 struct packet_config
*packet
= NULL
;
14141 struct remote_state
*rs
= get_remote_state ();
14142 char *buf
= rs
->buf
.data ();
14143 char *endbuf
= buf
+ get_remote_packet_size ();
14145 switch (conf
->format
)
14147 case BTRACE_FORMAT_BTS
:
14148 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
14151 case BTRACE_FORMAT_PT
:
14152 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
14156 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
14157 error (_("Target does not support branch tracing."));
14159 btrace_sync_conf (conf
);
14161 set_general_thread (ptid
);
14163 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14165 getpkt (&rs
->buf
, 0);
14167 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14169 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14170 error (_("Could not enable branch tracing for %s: %s"),
14171 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
14173 error (_("Could not enable branch tracing for %s."),
14174 target_pid_to_str (ptid
).c_str ());
14177 tinfo
= XCNEW (struct btrace_target_info
);
14178 tinfo
->ptid
= ptid
;
14180 /* If we fail to read the configuration, we lose some information, but the
14181 tracing itself is not impacted. */
14184 btrace_read_config (&tinfo
->conf
);
14186 catch (const gdb_exception_error
&err
)
14188 if (err
.message
!= NULL
)
14189 warning ("%s", err
.what ());
14195 /* Disable branch tracing. */
14198 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
14200 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
14201 struct remote_state
*rs
= get_remote_state ();
14202 char *buf
= rs
->buf
.data ();
14203 char *endbuf
= buf
+ get_remote_packet_size ();
14205 if (packet_config_support (packet
) != PACKET_ENABLE
)
14206 error (_("Target does not support branch tracing."));
14208 set_general_thread (tinfo
->ptid
);
14210 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14212 getpkt (&rs
->buf
, 0);
14214 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14216 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14217 error (_("Could not disable branch tracing for %s: %s"),
14218 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
14220 error (_("Could not disable branch tracing for %s."),
14221 target_pid_to_str (tinfo
->ptid
).c_str ());
14227 /* Teardown branch tracing. */
14230 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
14232 /* We must not talk to the target during teardown. */
14236 /* Read the branch trace. */
14239 remote_target::read_btrace (struct btrace_data
*btrace
,
14240 struct btrace_target_info
*tinfo
,
14241 enum btrace_read_type type
)
14243 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
14246 if (packet_config_support (packet
) != PACKET_ENABLE
)
14247 error (_("Target does not support branch tracing."));
14249 #if !defined(HAVE_LIBEXPAT)
14250 error (_("Cannot process branch tracing result. XML parsing not supported."));
14255 case BTRACE_READ_ALL
:
14258 case BTRACE_READ_NEW
:
14261 case BTRACE_READ_DELTA
:
14265 internal_error (__FILE__
, __LINE__
,
14266 _("Bad branch tracing read type: %u."),
14267 (unsigned int) type
);
14270 gdb::optional
<gdb::char_vector
> xml
14271 = target_read_stralloc (current_inferior ()->top_target (),
14272 TARGET_OBJECT_BTRACE
, annex
);
14274 return BTRACE_ERR_UNKNOWN
;
14276 parse_xml_btrace (btrace
, xml
->data ());
14278 return BTRACE_ERR_NONE
;
14281 const struct btrace_config
*
14282 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
14284 return &tinfo
->conf
;
14288 remote_target::augmented_libraries_svr4_read ()
14290 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
14294 /* Implementation of to_load. */
14297 remote_target::load (const char *name
, int from_tty
)
14299 generic_load (name
, from_tty
);
14302 /* Accepts an integer PID; returns a string representing a file that
14303 can be opened on the remote side to get the symbols for the child
14304 process. Returns NULL if the operation is not supported. */
14307 remote_target::pid_to_exec_file (int pid
)
14309 static gdb::optional
<gdb::char_vector
> filename
;
14310 char *annex
= NULL
;
14312 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
14315 inferior
*inf
= find_inferior_pid (this, pid
);
14317 internal_error (__FILE__
, __LINE__
,
14318 _("not currently attached to process %d"), pid
);
14320 if (!inf
->fake_pid_p
)
14322 const int annex_size
= 9;
14324 annex
= (char *) alloca (annex_size
);
14325 xsnprintf (annex
, annex_size
, "%x", pid
);
14328 filename
= target_read_stralloc (current_inferior ()->top_target (),
14329 TARGET_OBJECT_EXEC_FILE
, annex
);
14331 return filename
? filename
->data () : nullptr;
14334 /* Implement the to_can_do_single_step target_ops method. */
14337 remote_target::can_do_single_step ()
14339 /* We can only tell whether target supports single step or not by
14340 supported s and S vCont actions if the stub supports vContSupported
14341 feature. If the stub doesn't support vContSupported feature,
14342 we have conservatively to think target doesn't supports single
14344 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
14346 struct remote_state
*rs
= get_remote_state ();
14348 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14349 remote_vcont_probe ();
14351 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14357 /* Implementation of the to_execution_direction method for the remote
14360 enum exec_direction_kind
14361 remote_target::execution_direction ()
14363 struct remote_state
*rs
= get_remote_state ();
14365 return rs
->last_resume_exec_dir
;
14368 /* Return pointer to the thread_info struct which corresponds to
14369 THREAD_HANDLE (having length HANDLE_LEN). */
14372 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14376 for (thread_info
*tp
: all_non_exited_threads (this))
14378 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14380 if (tp
->inf
== inf
&& priv
!= NULL
)
14382 if (handle_len
!= priv
->thread_handle
.size ())
14383 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14384 handle_len
, priv
->thread_handle
.size ());
14385 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14395 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14397 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14398 return priv
->thread_handle
;
14402 remote_target::can_async_p ()
14404 struct remote_state
*rs
= get_remote_state ();
14406 /* We don't go async if the user has explicitly prevented it with the
14407 "maint set target-async" command. */
14408 if (!target_async_permitted
)
14411 /* We're async whenever the serial device is. */
14412 return serial_can_async_p (rs
->remote_desc
);
14416 remote_target::is_async_p ()
14418 struct remote_state
*rs
= get_remote_state ();
14420 if (!target_async_permitted
)
14421 /* We only enable async when the user specifically asks for it. */
14424 /* We're async whenever the serial device is. */
14425 return serial_is_async_p (rs
->remote_desc
);
14428 /* Pass the SERIAL event on and up to the client. One day this code
14429 will be able to delay notifying the client of an event until the
14430 point where an entire packet has been received. */
14432 static serial_event_ftype remote_async_serial_handler
;
14435 remote_async_serial_handler (struct serial
*scb
, void *context
)
14437 /* Don't propogate error information up to the client. Instead let
14438 the client find out about the error by querying the target. */
14439 inferior_event_handler (INF_REG_EVENT
);
14443 remote_async_inferior_event_handler (gdb_client_data data
)
14445 inferior_event_handler (INF_REG_EVENT
);
14449 remote_target::async_wait_fd ()
14451 struct remote_state
*rs
= get_remote_state ();
14452 return rs
->remote_desc
->fd
;
14456 remote_target::async (int enable
)
14458 struct remote_state
*rs
= get_remote_state ();
14462 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14464 /* If there are pending events in the stop reply queue tell the
14465 event loop to process them. */
14466 if (!rs
->stop_reply_queue
.empty ())
14467 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14468 /* For simplicity, below we clear the pending events token
14469 without remembering whether it is marked, so here we always
14470 mark it. If there's actually no pending notification to
14471 process, this ends up being a no-op (other than a spurious
14472 event-loop wakeup). */
14473 if (target_is_non_stop_p ())
14474 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14478 serial_async (rs
->remote_desc
, NULL
, NULL
);
14479 /* If the core is disabling async, it doesn't want to be
14480 disturbed with target events. Clear all async event sources
14482 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14483 if (target_is_non_stop_p ())
14484 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14488 /* Implementation of the to_thread_events method. */
14491 remote_target::thread_events (int enable
)
14493 struct remote_state
*rs
= get_remote_state ();
14494 size_t size
= get_remote_packet_size ();
14496 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14499 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14501 getpkt (&rs
->buf
, 0);
14503 switch (packet_ok (rs
->buf
,
14504 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14507 if (strcmp (rs
->buf
.data (), "OK") != 0)
14508 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14511 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14513 case PACKET_UNKNOWN
:
14519 show_remote_cmd (const char *args
, int from_tty
)
14521 /* We can't just use cmd_show_list here, because we want to skip
14522 the redundant "show remote Z-packet" and the legacy aliases. */
14523 struct cmd_list_element
*list
= remote_show_cmdlist
;
14524 struct ui_out
*uiout
= current_uiout
;
14526 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14527 for (; list
!= NULL
; list
= list
->next
)
14528 if (strcmp (list
->name
, "Z-packet") == 0)
14530 else if (list
->type
== not_set_cmd
)
14531 /* Alias commands are exactly like the original, except they
14532 don't have the normal type. */
14536 ui_out_emit_tuple
option_emitter (uiout
, "option");
14538 uiout
->field_string ("name", list
->name
);
14539 uiout
->text (": ");
14540 if (list
->type
== show_cmd
)
14541 do_show_command (NULL
, from_tty
, list
);
14543 cmd_func (list
, NULL
, from_tty
);
14548 /* Function to be called whenever a new objfile (shlib) is detected. */
14550 remote_new_objfile (struct objfile
*objfile
)
14552 remote_target
*remote
= get_current_remote_target ();
14554 /* First, check whether the current inferior's process target is a remote
14556 if (remote
== nullptr)
14559 /* When we are attaching or handling a fork child and the shared library
14560 subsystem reads the list of loaded libraries, we receive new objfile
14561 events in between each found library. The libraries are read in an
14562 undefined order, so if we gave the remote side a chance to look up
14563 symbols between each objfile, we might give it an inconsistent picture
14564 of the inferior. It could appear that a library A appears loaded but
14565 a library B does not, even though library A requires library B. That
14566 would present a state that couldn't normally exist in the inferior.
14568 So, skip these events, we'll give the remote a chance to look up symbols
14569 once all the loaded libraries and their symbols are known to GDB. */
14570 if (current_inferior ()->in_initial_library_scan
)
14573 remote
->remote_check_symbols ();
14576 /* Pull all the tracepoints defined on the target and create local
14577 data structures representing them. We don't want to create real
14578 tracepoints yet, we don't want to mess up the user's existing
14582 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14584 struct remote_state
*rs
= get_remote_state ();
14587 /* Ask for a first packet of tracepoint definition. */
14589 getpkt (&rs
->buf
, 0);
14590 p
= rs
->buf
.data ();
14591 while (*p
&& *p
!= 'l')
14593 parse_tracepoint_definition (p
, utpp
);
14594 /* Ask for another packet of tracepoint definition. */
14596 getpkt (&rs
->buf
, 0);
14597 p
= rs
->buf
.data ();
14603 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14605 struct remote_state
*rs
= get_remote_state ();
14608 /* Ask for a first packet of variable definition. */
14610 getpkt (&rs
->buf
, 0);
14611 p
= rs
->buf
.data ();
14612 while (*p
&& *p
!= 'l')
14614 parse_tsv_definition (p
, utsvp
);
14615 /* Ask for another packet of variable definition. */
14617 getpkt (&rs
->buf
, 0);
14618 p
= rs
->buf
.data ();
14623 /* The "set/show range-stepping" show hook. */
14626 show_range_stepping (struct ui_file
*file
, int from_tty
,
14627 struct cmd_list_element
*c
,
14630 fprintf_filtered (file
,
14631 _("Debugger's willingness to use range stepping "
14632 "is %s.\n"), value
);
14635 /* Return true if the vCont;r action is supported by the remote
14639 remote_target::vcont_r_supported ()
14641 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14642 remote_vcont_probe ();
14644 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14645 && get_remote_state ()->supports_vCont
.r
);
14648 /* The "set/show range-stepping" set hook. */
14651 set_range_stepping (const char *ignore_args
, int from_tty
,
14652 struct cmd_list_element
*c
)
14654 /* When enabling, check whether range stepping is actually supported
14655 by the target, and warn if not. */
14656 if (use_range_stepping
)
14658 remote_target
*remote
= get_current_remote_target ();
14660 || !remote
->vcont_r_supported ())
14661 warning (_("Range stepping is not supported by the current target"));
14666 show_remote_debug (struct ui_file
*file
, int from_tty
,
14667 struct cmd_list_element
*c
, const char *value
)
14669 fprintf_filtered (file
, _("Debugging of remote protocol is %s.\n"),
14674 show_remote_timeout (struct ui_file
*file
, int from_tty
,
14675 struct cmd_list_element
*c
, const char *value
)
14677 fprintf_filtered (file
,
14678 _("Timeout limit to wait for target to respond is %s.\n"),
14682 /* Implement the "supports_memory_tagging" target_ops method. */
14685 remote_target::supports_memory_tagging ()
14687 return remote_memory_tagging_p ();
14690 /* Create the qMemTags packet given ADDRESS, LEN and TYPE. */
14693 create_fetch_memtags_request (gdb::char_vector
&packet
, CORE_ADDR address
,
14694 size_t len
, int type
)
14696 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
14698 std::string request
= string_printf ("qMemTags:%s,%s:%s",
14699 phex_nz (address
, addr_size
),
14700 phex_nz (len
, sizeof (len
)),
14701 phex_nz (type
, sizeof (type
)));
14703 strcpy (packet
.data (), request
.c_str ());
14706 /* Parse the qMemTags packet reply into TAGS.
14708 Return true if successful, false otherwise. */
14711 parse_fetch_memtags_reply (const gdb::char_vector
&reply
,
14712 gdb::byte_vector
&tags
)
14714 if (reply
.empty () || reply
[0] == 'E' || reply
[0] != 'm')
14717 /* Copy the tag data. */
14718 tags
= hex2bin (reply
.data () + 1);
14723 /* Create the QMemTags packet given ADDRESS, LEN, TYPE and TAGS. */
14726 create_store_memtags_request (gdb::char_vector
&packet
, CORE_ADDR address
,
14727 size_t len
, int type
,
14728 const gdb::byte_vector
&tags
)
14730 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
14732 /* Put together the main packet, address and length. */
14733 std::string request
= string_printf ("QMemTags:%s,%s:%s:",
14734 phex_nz (address
, addr_size
),
14735 phex_nz (len
, sizeof (len
)),
14736 phex_nz (type
, sizeof (type
)));
14737 request
+= bin2hex (tags
.data (), tags
.size ());
14739 /* Check if we have exceeded the maximum packet size. */
14740 if (packet
.size () < request
.length ())
14741 error (_("Contents too big for packet QMemTags."));
14743 strcpy (packet
.data (), request
.c_str ());
14746 /* Implement the "fetch_memtags" target_ops method. */
14749 remote_target::fetch_memtags (CORE_ADDR address
, size_t len
,
14750 gdb::byte_vector
&tags
, int type
)
14752 /* Make sure the qMemTags packet is supported. */
14753 if (!remote_memory_tagging_p ())
14754 gdb_assert_not_reached ("remote fetch_memtags called with packet disabled");
14756 struct remote_state
*rs
= get_remote_state ();
14758 create_fetch_memtags_request (rs
->buf
, address
, len
, type
);
14761 getpkt (&rs
->buf
, 0);
14763 return parse_fetch_memtags_reply (rs
->buf
, tags
);
14766 /* Implement the "store_memtags" target_ops method. */
14769 remote_target::store_memtags (CORE_ADDR address
, size_t len
,
14770 const gdb::byte_vector
&tags
, int type
)
14772 /* Make sure the QMemTags packet is supported. */
14773 if (!remote_memory_tagging_p ())
14774 gdb_assert_not_reached ("remote store_memtags called with packet disabled");
14776 struct remote_state
*rs
= get_remote_state ();
14778 create_store_memtags_request (rs
->buf
, address
, len
, type
, tags
);
14781 getpkt (&rs
->buf
, 0);
14783 /* Verify if the request was successful. */
14784 return packet_check_result (rs
->buf
.data ()) == PACKET_OK
;
14787 /* Return true if remote target T is non-stop. */
14790 remote_target_is_non_stop_p (remote_target
*t
)
14792 scoped_restore_current_thread restore_thread
;
14793 switch_to_target_no_thread (t
);
14795 return target_is_non_stop_p ();
14800 namespace selftests
{
14803 test_memory_tagging_functions ()
14805 remote_target remote
;
14807 struct packet_config
*config
14808 = &remote_protocol_packets
[PACKET_memory_tagging_feature
];
14810 scoped_restore restore_memtag_support_
14811 = make_scoped_restore (&config
->support
);
14813 /* Test memory tagging packet support. */
14814 config
->support
= PACKET_SUPPORT_UNKNOWN
;
14815 SELF_CHECK (remote
.supports_memory_tagging () == false);
14816 config
->support
= PACKET_DISABLE
;
14817 SELF_CHECK (remote
.supports_memory_tagging () == false);
14818 config
->support
= PACKET_ENABLE
;
14819 SELF_CHECK (remote
.supports_memory_tagging () == true);
14821 /* Setup testing. */
14822 gdb::char_vector packet
;
14823 gdb::byte_vector tags
, bv
;
14824 std::string expected
, reply
;
14825 packet
.resize (32000);
14827 /* Test creating a qMemTags request. */
14829 expected
= "qMemTags:0,0:0";
14830 create_fetch_memtags_request (packet
, 0x0, 0x0, 0);
14831 SELF_CHECK (strcmp (packet
.data (), expected
.c_str ()) == 0);
14833 expected
= "qMemTags:deadbeef,10:1";
14834 create_fetch_memtags_request (packet
, 0xdeadbeef, 16, 1);
14835 SELF_CHECK (strcmp (packet
.data (), expected
.c_str ()) == 0);
14837 /* Test parsing a qMemTags reply. */
14839 /* Error reply, tags vector unmodified. */
14841 strcpy (packet
.data (), reply
.c_str ());
14843 SELF_CHECK (parse_fetch_memtags_reply (packet
, tags
) == false);
14844 SELF_CHECK (tags
.size () == 0);
14846 /* Valid reply, tags vector updated. */
14850 for (int i
= 0; i
< 5; i
++)
14853 reply
= "m" + bin2hex (bv
.data (), bv
.size ());
14854 strcpy (packet
.data (), reply
.c_str ());
14856 SELF_CHECK (parse_fetch_memtags_reply (packet
, tags
) == true);
14857 SELF_CHECK (tags
.size () == 5);
14859 for (int i
= 0; i
< 5; i
++)
14860 SELF_CHECK (tags
[i
] == i
);
14862 /* Test creating a QMemTags request. */
14864 /* Empty tag data. */
14866 expected
= "QMemTags:0,0:0:";
14867 create_store_memtags_request (packet
, 0x0, 0x0, 0, tags
);
14868 SELF_CHECK (memcmp (packet
.data (), expected
.c_str (),
14869 expected
.length ()) == 0);
14871 /* Non-empty tag data. */
14873 for (int i
= 0; i
< 5; i
++)
14874 tags
.push_back (i
);
14875 expected
= "QMemTags:deadbeef,ff:1:0001020304";
14876 create_store_memtags_request (packet
, 0xdeadbeef, 255, 1, tags
);
14877 SELF_CHECK (memcmp (packet
.data (), expected
.c_str (),
14878 expected
.length ()) == 0);
14881 } // namespace selftests
14882 #endif /* GDB_SELF_TEST */
14884 void _initialize_remote ();
14886 _initialize_remote ()
14888 /* architecture specific data */
14889 remote_g_packet_data_handle
=
14890 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14892 add_target (remote_target_info
, remote_target::open
);
14893 add_target (extended_remote_target_info
, extended_remote_target::open
);
14895 /* Hook into new objfile notification. */
14896 gdb::observers::new_objfile
.attach (remote_new_objfile
, "remote");
14899 init_remote_threadtests ();
14902 /* set/show remote ... */
14904 add_basic_prefix_cmd ("remote", class_maintenance
, _("\
14905 Remote protocol specific variables.\n\
14906 Configure various remote-protocol specific variables such as\n\
14907 the packets being used."),
14908 &remote_set_cmdlist
,
14909 0 /* allow-unknown */, &setlist
);
14910 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14911 Remote protocol specific variables.\n\
14912 Configure various remote-protocol specific variables such as\n\
14913 the packets being used."),
14914 &remote_show_cmdlist
,
14915 0 /* allow-unknown */, &showlist
);
14917 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14918 Compare section data on target to the exec file.\n\
14919 Argument is a single section name (default: all loaded sections).\n\
14920 To compare only read-only loaded sections, specify the -r option."),
14923 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14924 Send an arbitrary packet to a remote target.\n\
14925 maintenance packet TEXT\n\
14926 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14927 this command sends the string TEXT to the inferior, and displays the\n\
14928 response packet. GDB supplies the initial `$' character, and the\n\
14929 terminating `#' character and checksum."),
14932 set_show_commands remotebreak_cmds
14933 = add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14934 Set whether to send break if interrupted."), _("\
14935 Show whether to send break if interrupted."), _("\
14936 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14937 set_remotebreak
, show_remotebreak
,
14938 &setlist
, &showlist
);
14939 deprecate_cmd (remotebreak_cmds
.set
, "set remote interrupt-sequence");
14940 deprecate_cmd (remotebreak_cmds
.show
, "show remote interrupt-sequence");
14942 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14943 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14945 Set interrupt sequence to remote target."), _("\
14946 Show interrupt sequence to remote target."), _("\
14947 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14948 NULL
, show_interrupt_sequence
,
14949 &remote_set_cmdlist
,
14950 &remote_show_cmdlist
);
14952 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14953 &interrupt_on_connect
, _("\
14954 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14955 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14956 If set, interrupt sequence is sent to remote target."),
14958 &remote_set_cmdlist
, &remote_show_cmdlist
);
14960 /* Install commands for configuring memory read/write packets. */
14962 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14963 Set the maximum number of bytes per memory write packet (deprecated)."),
14965 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14966 Show the maximum number of bytes per memory write packet (deprecated)."),
14968 add_cmd ("memory-write-packet-size", no_class
,
14969 set_memory_write_packet_size
, _("\
14970 Set the maximum number of bytes per memory-write packet.\n\
14971 Specify the number of bytes in a packet or 0 (zero) for the\n\
14972 default packet size. The actual limit is further reduced\n\
14973 dependent on the target. Specify ``fixed'' to disable the\n\
14974 further restriction and ``limit'' to enable that restriction."),
14975 &remote_set_cmdlist
);
14976 add_cmd ("memory-read-packet-size", no_class
,
14977 set_memory_read_packet_size
, _("\
14978 Set the maximum number of bytes per memory-read packet.\n\
14979 Specify the number of bytes in a packet or 0 (zero) for the\n\
14980 default packet size. The actual limit is further reduced\n\
14981 dependent on the target. Specify ``fixed'' to disable the\n\
14982 further restriction and ``limit'' to enable that restriction."),
14983 &remote_set_cmdlist
);
14984 add_cmd ("memory-write-packet-size", no_class
,
14985 show_memory_write_packet_size
,
14986 _("Show the maximum number of bytes per memory-write packet."),
14987 &remote_show_cmdlist
);
14988 add_cmd ("memory-read-packet-size", no_class
,
14989 show_memory_read_packet_size
,
14990 _("Show the maximum number of bytes per memory-read packet."),
14991 &remote_show_cmdlist
);
14993 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14994 &remote_hw_watchpoint_limit
, _("\
14995 Set the maximum number of target hardware watchpoints."), _("\
14996 Show the maximum number of target hardware watchpoints."), _("\
14997 Specify \"unlimited\" for unlimited hardware watchpoints."),
14998 NULL
, show_hardware_watchpoint_limit
,
14999 &remote_set_cmdlist
,
15000 &remote_show_cmdlist
);
15001 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
15003 &remote_hw_watchpoint_length_limit
, _("\
15004 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
15005 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
15006 Specify \"unlimited\" to allow watchpoints of unlimited size."),
15007 NULL
, show_hardware_watchpoint_length_limit
,
15008 &remote_set_cmdlist
, &remote_show_cmdlist
);
15009 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
15010 &remote_hw_breakpoint_limit
, _("\
15011 Set the maximum number of target hardware breakpoints."), _("\
15012 Show the maximum number of target hardware breakpoints."), _("\
15013 Specify \"unlimited\" for unlimited hardware breakpoints."),
15014 NULL
, show_hardware_breakpoint_limit
,
15015 &remote_set_cmdlist
, &remote_show_cmdlist
);
15017 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
15018 &remote_address_size
, _("\
15019 Set the maximum size of the address (in bits) in a memory packet."), _("\
15020 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
15022 NULL
, /* FIXME: i18n: */
15023 &setlist
, &showlist
);
15025 init_all_packet_configs ();
15027 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
15028 "X", "binary-download", 1);
15030 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
15031 "vCont", "verbose-resume", 0);
15033 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
15034 "QPassSignals", "pass-signals", 0);
15036 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
15037 "QCatchSyscalls", "catch-syscalls", 0);
15039 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
15040 "QProgramSignals", "program-signals", 0);
15042 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
15043 "QSetWorkingDir", "set-working-dir", 0);
15045 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
15046 "QStartupWithShell", "startup-with-shell", 0);
15048 add_packet_config_cmd (&remote_protocol_packets
15049 [PACKET_QEnvironmentHexEncoded
],
15050 "QEnvironmentHexEncoded", "environment-hex-encoded",
15053 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
15054 "QEnvironmentReset", "environment-reset",
15057 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
15058 "QEnvironmentUnset", "environment-unset",
15061 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
15062 "qSymbol", "symbol-lookup", 0);
15064 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
15065 "P", "set-register", 1);
15067 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
15068 "p", "fetch-register", 1);
15070 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
15071 "Z0", "software-breakpoint", 0);
15073 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
15074 "Z1", "hardware-breakpoint", 0);
15076 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
15077 "Z2", "write-watchpoint", 0);
15079 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
15080 "Z3", "read-watchpoint", 0);
15082 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
15083 "Z4", "access-watchpoint", 0);
15085 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
15086 "qXfer:auxv:read", "read-aux-vector", 0);
15088 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
15089 "qXfer:exec-file:read", "pid-to-exec-file", 0);
15091 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
15092 "qXfer:features:read", "target-features", 0);
15094 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
15095 "qXfer:libraries:read", "library-info", 0);
15097 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
15098 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
15100 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
15101 "qXfer:memory-map:read", "memory-map", 0);
15103 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
15104 "qXfer:osdata:read", "osdata", 0);
15106 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
15107 "qXfer:threads:read", "threads", 0);
15109 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
15110 "qXfer:siginfo:read", "read-siginfo-object", 0);
15112 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
15113 "qXfer:siginfo:write", "write-siginfo-object", 0);
15115 add_packet_config_cmd
15116 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
15117 "qXfer:traceframe-info:read", "traceframe-info", 0);
15119 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
15120 "qXfer:uib:read", "unwind-info-block", 0);
15122 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
15123 "qGetTLSAddr", "get-thread-local-storage-address",
15126 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
15127 "qGetTIBAddr", "get-thread-information-block-address",
15130 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
15131 "bc", "reverse-continue", 0);
15133 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
15134 "bs", "reverse-step", 0);
15136 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
15137 "qSupported", "supported-packets", 0);
15139 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
15140 "qSearch:memory", "search-memory", 0);
15142 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
15143 "qTStatus", "trace-status", 0);
15145 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
15146 "vFile:setfs", "hostio-setfs", 0);
15148 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
15149 "vFile:open", "hostio-open", 0);
15151 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
15152 "vFile:pread", "hostio-pread", 0);
15154 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
15155 "vFile:pwrite", "hostio-pwrite", 0);
15157 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
15158 "vFile:close", "hostio-close", 0);
15160 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
15161 "vFile:unlink", "hostio-unlink", 0);
15163 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
15164 "vFile:readlink", "hostio-readlink", 0);
15166 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
15167 "vFile:fstat", "hostio-fstat", 0);
15169 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
15170 "vAttach", "attach", 0);
15172 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
15175 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
15176 "QStartNoAckMode", "noack", 0);
15178 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
15179 "vKill", "kill", 0);
15181 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
15182 "qAttached", "query-attached", 0);
15184 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
15185 "ConditionalTracepoints",
15186 "conditional-tracepoints", 0);
15188 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
15189 "ConditionalBreakpoints",
15190 "conditional-breakpoints", 0);
15192 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
15193 "BreakpointCommands",
15194 "breakpoint-commands", 0);
15196 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
15197 "FastTracepoints", "fast-tracepoints", 0);
15199 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
15200 "TracepointSource", "TracepointSource", 0);
15202 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
15203 "QAllow", "allow", 0);
15205 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
15206 "StaticTracepoints", "static-tracepoints", 0);
15208 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
15209 "InstallInTrace", "install-in-trace", 0);
15211 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
15212 "qXfer:statictrace:read", "read-sdata-object", 0);
15214 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
15215 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
15217 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
15218 "QDisableRandomization", "disable-randomization", 0);
15220 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
15221 "QAgent", "agent", 0);
15223 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
15224 "QTBuffer:size", "trace-buffer-size", 0);
15226 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
15227 "Qbtrace:off", "disable-btrace", 0);
15229 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
15230 "Qbtrace:bts", "enable-btrace-bts", 0);
15232 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
15233 "Qbtrace:pt", "enable-btrace-pt", 0);
15235 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
15236 "qXfer:btrace", "read-btrace", 0);
15238 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
15239 "qXfer:btrace-conf", "read-btrace-conf", 0);
15241 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
15242 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
15244 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
15245 "multiprocess-feature", "multiprocess-feature", 0);
15247 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
15248 "swbreak-feature", "swbreak-feature", 0);
15250 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
15251 "hwbreak-feature", "hwbreak-feature", 0);
15253 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
15254 "fork-event-feature", "fork-event-feature", 0);
15256 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
15257 "vfork-event-feature", "vfork-event-feature", 0);
15259 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
15260 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
15262 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
15263 "vContSupported", "verbose-resume-supported", 0);
15265 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
15266 "exec-event-feature", "exec-event-feature", 0);
15268 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
15269 "vCtrlC", "ctrl-c", 0);
15271 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
15272 "QThreadEvents", "thread-events", 0);
15274 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
15275 "N stop reply", "no-resumed-stop-reply", 0);
15277 add_packet_config_cmd (&remote_protocol_packets
[PACKET_memory_tagging_feature
],
15278 "memory-tagging-feature", "memory-tagging-feature", 0);
15280 /* Assert that we've registered "set remote foo-packet" commands
15281 for all packet configs. */
15285 for (i
= 0; i
< PACKET_MAX
; i
++)
15287 /* Ideally all configs would have a command associated. Some
15288 still don't though. */
15293 case PACKET_QNonStop
:
15294 case PACKET_EnableDisableTracepoints_feature
:
15295 case PACKET_tracenz_feature
:
15296 case PACKET_DisconnectedTracing_feature
:
15297 case PACKET_augmented_libraries_svr4_read_feature
:
15299 /* Additions to this list need to be well justified:
15300 pre-existing packets are OK; new packets are not. */
15308 /* This catches both forgetting to add a config command, and
15309 forgetting to remove a packet from the exception list. */
15310 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
15314 /* Keep the old ``set remote Z-packet ...'' working. Each individual
15315 Z sub-packet has its own set and show commands, but users may
15316 have sets to this variable in their .gdbinit files (or in their
15318 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
15319 &remote_Z_packet_detect
, _("\
15320 Set use of remote protocol `Z' packets."), _("\
15321 Show use of remote protocol `Z' packets."), _("\
15322 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
15324 set_remote_protocol_Z_packet_cmd
,
15325 show_remote_protocol_Z_packet_cmd
,
15326 /* FIXME: i18n: Use of remote protocol
15327 `Z' packets is %s. */
15328 &remote_set_cmdlist
, &remote_show_cmdlist
);
15330 add_basic_prefix_cmd ("remote", class_files
, _("\
15331 Manipulate files on the remote system.\n\
15332 Transfer files to and from the remote target system."),
15334 0 /* allow-unknown */, &cmdlist
);
15336 add_cmd ("put", class_files
, remote_put_command
,
15337 _("Copy a local file to the remote system."),
15340 add_cmd ("get", class_files
, remote_get_command
,
15341 _("Copy a remote file to the local system."),
15344 add_cmd ("delete", class_files
, remote_delete_command
,
15345 _("Delete a remote file."),
15348 add_setshow_string_noescape_cmd ("exec-file", class_files
,
15349 &remote_exec_file_var
, _("\
15350 Set the remote pathname for \"run\"."), _("\
15351 Show the remote pathname for \"run\"."), NULL
,
15352 set_remote_exec_file
,
15353 show_remote_exec_file
,
15354 &remote_set_cmdlist
,
15355 &remote_show_cmdlist
);
15357 add_setshow_boolean_cmd ("range-stepping", class_run
,
15358 &use_range_stepping
, _("\
15359 Enable or disable range stepping."), _("\
15360 Show whether target-assisted range stepping is enabled."), _("\
15361 If on, and the target supports it, when stepping a source line, GDB\n\
15362 tells the target to step the corresponding range of addresses itself instead\n\
15363 of issuing multiple single-steps. This speeds up source level\n\
15364 stepping. If off, GDB always issues single-steps, even if range\n\
15365 stepping is supported by the target. The default is on."),
15366 set_range_stepping
,
15367 show_range_stepping
,
15371 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
15372 Set watchdog timer."), _("\
15373 Show watchdog timer."), _("\
15374 When non-zero, this timeout is used instead of waiting forever for a target\n\
15375 to finish a low-level step or continue operation. If the specified amount\n\
15376 of time passes without a response from the target, an error occurs."),
15379 &setlist
, &showlist
);
15381 add_setshow_zuinteger_unlimited_cmd ("remote-packet-max-chars", no_class
,
15382 &remote_packet_max_chars
, _("\
15383 Set the maximum number of characters to display for each remote packet."), _("\
15384 Show the maximum number of characters to display for each remote packet."), _("\
15385 Specify \"unlimited\" to display all the characters."),
15386 NULL
, show_remote_packet_max_chars
,
15387 &setdebuglist
, &showdebuglist
);
15389 add_setshow_boolean_cmd ("remote", no_class
, &remote_debug
,
15390 _("Set debugging of remote protocol."),
15391 _("Show debugging of remote protocol."),
15393 When enabled, each packet sent or received with the remote target\n\
15397 &setdebuglist
, &showdebuglist
);
15399 add_setshow_zuinteger_unlimited_cmd ("remotetimeout", no_class
,
15400 &remote_timeout
, _("\
15401 Set timeout limit to wait for target to respond."), _("\
15402 Show timeout limit to wait for target to respond."), _("\
15403 This value is used to set the time limit for gdb to wait for a response\n\
15404 from the target."),
15406 show_remote_timeout
,
15407 &setlist
, &showlist
);
15409 /* Eventually initialize fileio. See fileio.c */
15410 initialize_remote_fileio (&remote_set_cmdlist
, &remote_show_cmdlist
);
15413 selftests::register_test ("remote_memory_tagging",
15414 selftests::test_memory_tagging_functions
);