1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
30 #include "process-stratum-target.h"
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
39 #include "observable.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "gdbsupport/filestuff.h"
46 #include "gdbsupport/rsp-low.h"
50 #include "gdbsupport/gdb_sys_time.h"
52 #include "gdbsupport/event-loop.h"
53 #include "event-top.h"
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
71 #include "gdbsupport/agent.h"
73 #include "record-btrace.h"
75 #include "gdbsupport/scoped_restore.h"
76 #include "gdbsupport/environ.h"
77 #include "gdbsupport/byte-vector.h"
78 #include "gdbsupport/search.h"
80 #include <unordered_map>
81 #include "async-event.h"
82 #include "gdbsupport/selftest.h"
84 /* The remote target. */
86 static const char remote_doc
[] = N_("\
87 Use a remote computer via a serial line, using a gdb-specific protocol.\n\
88 Specify the serial device it is connected to\n\
89 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
93 bool remote_debug
= false;
95 #define OPAQUETHREADBYTES 8
97 /* a 64 bit opaque identifier */
98 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
100 struct gdb_ext_thread_info
;
101 struct threads_listing_context
;
102 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
103 struct protocol_feature
;
107 typedef std::unique_ptr
<stop_reply
> stop_reply_up
;
109 /* Generic configuration support for packets the stub optionally
110 supports. Allows the user to specify the use of the packet as well
111 as allowing GDB to auto-detect support in the remote stub. */
115 PACKET_SUPPORT_UNKNOWN
= 0,
120 /* Analyze a packet's return value and update the packet config
130 struct threads_listing_context
;
132 /* Stub vCont actions support.
134 Each field is a boolean flag indicating whether the stub reports
135 support for the corresponding action. */
137 struct vCont_action_support
152 /* About this many threadids fit in a packet. */
154 #define MAXTHREADLISTRESULTS 32
156 /* Data for the vFile:pread readahead cache. */
158 struct readahead_cache
160 /* Invalidate the readahead cache. */
163 /* Invalidate the readahead cache if it is holding data for FD. */
164 void invalidate_fd (int fd
);
166 /* Serve pread from the readahead cache. Returns number of bytes
167 read, or 0 if the request can't be served from the cache. */
168 int pread (int fd
, gdb_byte
*read_buf
, size_t len
, ULONGEST offset
);
170 /* The file descriptor for the file that is being cached. -1 if the
174 /* The offset into the file that the cache buffer corresponds
178 /* The buffer holding the cache contents. */
179 gdb_byte
*buf
= nullptr;
180 /* The buffer's size. We try to read as much as fits into a packet
184 /* Cache hit and miss counters. */
185 ULONGEST hit_count
= 0;
186 ULONGEST miss_count
= 0;
189 /* Description of the remote protocol for a given architecture. */
193 long offset
; /* Offset into G packet. */
194 long regnum
; /* GDB's internal register number. */
195 LONGEST pnum
; /* Remote protocol register number. */
196 int in_g_packet
; /* Always part of G packet. */
197 /* long size in bytes; == register_size (target_gdbarch (), regnum);
199 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
203 struct remote_arch_state
205 explicit remote_arch_state (struct gdbarch
*gdbarch
);
207 /* Description of the remote protocol registers. */
208 long sizeof_g_packet
;
210 /* Description of the remote protocol registers indexed by REGNUM
211 (making an array gdbarch_num_regs in size). */
212 std::unique_ptr
<packet_reg
[]> regs
;
214 /* This is the size (in chars) of the first response to the ``g''
215 packet. It is used as a heuristic when determining the maximum
216 size of memory-read and memory-write packets. A target will
217 typically only reserve a buffer large enough to hold the ``g''
218 packet. The size does not include packet overhead (headers and
220 long actual_register_packet_size
;
222 /* This is the maximum size (in chars) of a non read/write packet.
223 It is also used as a cap on the size of read/write packets. */
224 long remote_packet_size
;
227 /* Description of the remote protocol state for the currently
228 connected target. This is per-target state, and independent of the
229 selected architecture. */
238 /* Get the remote arch state for GDBARCH. */
239 struct remote_arch_state
*get_remote_arch_state (struct gdbarch
*gdbarch
);
243 /* A buffer to use for incoming packets, and its current size. The
244 buffer is grown dynamically for larger incoming packets.
245 Outgoing packets may also be constructed in this buffer.
246 The size of the buffer is always at least REMOTE_PACKET_SIZE;
247 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
249 gdb::char_vector buf
;
251 /* True if we're going through initial connection setup (finding out
252 about the remote side's threads, relocating symbols, etc.). */
253 bool starting_up
= false;
255 /* If we negotiated packet size explicitly (and thus can bypass
256 heuristics for the largest packet size that will not overflow
257 a buffer in the stub), this will be set to that packet size.
258 Otherwise zero, meaning to use the guessed size. */
259 long explicit_packet_size
= 0;
261 /* remote_wait is normally called when the target is running and
262 waits for a stop reply packet. But sometimes we need to call it
263 when the target is already stopped. We can send a "?" packet
264 and have remote_wait read the response. Or, if we already have
265 the response, we can stash it in BUF and tell remote_wait to
266 skip calling getpkt. This flag is set when BUF contains a
267 stop reply packet and the target is not waiting. */
268 int cached_wait_status
= 0;
270 /* True, if in no ack mode. That is, neither GDB nor the stub will
271 expect acks from each other. The connection is assumed to be
273 bool noack_mode
= false;
275 /* True if we're connected in extended remote mode. */
276 bool extended
= false;
278 /* True if we resumed the target and we're waiting for the target to
279 stop. In the mean time, we can't start another command/query.
280 The remote server wouldn't be ready to process it, so we'd
281 timeout waiting for a reply that would never come and eventually
282 we'd close the connection. This can happen in asynchronous mode
283 because we allow GDB commands while the target is running. */
284 bool waiting_for_stop_reply
= false;
286 /* The status of the stub support for the various vCont actions. */
287 vCont_action_support supports_vCont
;
288 /* Whether vCont support was probed already. This is a workaround
289 until packet_support is per-connection. */
290 bool supports_vCont_probed
;
292 /* True if the user has pressed Ctrl-C, but the target hasn't
293 responded to that. */
294 bool ctrlc_pending_p
= false;
296 /* True if we saw a Ctrl-C while reading or writing from/to the
297 remote descriptor. At that point it is not safe to send a remote
298 interrupt packet, so we instead remember we saw the Ctrl-C and
299 process it once we're done with sending/receiving the current
300 packet, which should be shortly. If however that takes too long,
301 and the user presses Ctrl-C again, we offer to disconnect. */
302 bool got_ctrlc_during_io
= false;
304 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
305 remote_open knows that we don't have a file open when the program
307 struct serial
*remote_desc
= nullptr;
309 /* These are the threads which we last sent to the remote system. The
310 TID member will be -1 for all or -2 for not sent yet. */
311 ptid_t general_thread
= null_ptid
;
312 ptid_t continue_thread
= null_ptid
;
314 /* This is the traceframe which we last selected on the remote system.
315 It will be -1 if no traceframe is selected. */
316 int remote_traceframe_number
= -1;
318 char *last_pass_packet
= nullptr;
320 /* The last QProgramSignals packet sent to the target. We bypass
321 sending a new program signals list down to the target if the new
322 packet is exactly the same as the last we sent. IOW, we only let
323 the target know about program signals list changes. */
324 char *last_program_signals_packet
= nullptr;
326 gdb_signal last_sent_signal
= GDB_SIGNAL_0
;
328 bool last_sent_step
= false;
330 /* The execution direction of the last resume we got. */
331 exec_direction_kind last_resume_exec_dir
= EXEC_FORWARD
;
333 char *finished_object
= nullptr;
334 char *finished_annex
= nullptr;
335 ULONGEST finished_offset
= 0;
337 /* Should we try the 'ThreadInfo' query packet?
339 This variable (NOT available to the user: auto-detect only!)
340 determines whether GDB will use the new, simpler "ThreadInfo"
341 query or the older, more complex syntax for thread queries.
342 This is an auto-detect variable (set to true at each connect,
343 and set to false when the target fails to recognize it). */
344 bool use_threadinfo_query
= false;
345 bool use_threadextra_query
= false;
347 threadref echo_nextthread
{};
348 threadref nextthread
{};
349 threadref resultthreadlist
[MAXTHREADLISTRESULTS
] {};
351 /* The state of remote notification. */
352 struct remote_notif_state
*notif_state
= nullptr;
354 /* The branch trace configuration. */
355 struct btrace_config btrace_config
{};
357 /* The argument to the last "vFile:setfs:" packet we sent, used
358 to avoid sending repeated unnecessary "vFile:setfs:" packets.
359 Initialized to -1 to indicate that no "vFile:setfs:" packet
360 has yet been sent. */
363 /* A readahead cache for vFile:pread. Often, reading a binary
364 involves a sequence of small reads. E.g., when parsing an ELF
365 file. A readahead cache helps mostly the case of remote
366 debugging on a connection with higher latency, due to the
367 request/reply nature of the RSP. We only cache data for a single
368 file descriptor at a time. */
369 struct readahead_cache readahead_cache
;
371 /* The list of already fetched and acknowledged stop events. This
372 queue is used for notification Stop, and other notifications
373 don't need queue for their events, because the notification
374 events of Stop can't be consumed immediately, so that events
375 should be queued first, and be consumed by remote_wait_{ns,as}
376 one per time. Other notifications can consume their events
377 immediately, so queue is not needed for them. */
378 std::vector
<stop_reply_up
> stop_reply_queue
;
380 /* Asynchronous signal handle registered as event loop source for
381 when we have pending events ready to be passed to the core. */
382 struct async_event_handler
*remote_async_inferior_event_token
= nullptr;
384 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
385 ``forever'' still use the normal timeout mechanism. This is
386 currently used by the ASYNC code to guarentee that target reads
387 during the initial connect always time-out. Once getpkt has been
388 modified to return a timeout indication and, in turn
389 remote_wait()/wait_for_inferior() have gained a timeout parameter
391 int wait_forever_enabled_p
= 1;
394 /* Mapping of remote protocol data for each gdbarch. Usually there
395 is only one entry here, though we may see more with stubs that
396 support multi-process. */
397 std::unordered_map
<struct gdbarch
*, remote_arch_state
>
401 static const target_info remote_target_info
= {
403 N_("Remote serial target in gdb-specific protocol"),
407 class remote_target
: public process_stratum_target
410 remote_target () = default;
411 ~remote_target () override
;
413 const target_info
&info () const override
414 { return remote_target_info
; }
416 const char *connection_string () override
;
418 thread_control_capabilities
get_thread_control_capabilities () override
419 { return tc_schedlock
; }
421 /* Open a remote connection. */
422 static void open (const char *, int);
424 void close () override
;
426 void detach (inferior
*, int) override
;
427 void disconnect (const char *, int) override
;
429 void commit_resumed () override
;
430 void resume (ptid_t
, int, enum gdb_signal
) override
;
431 ptid_t
wait (ptid_t
, struct target_waitstatus
*, target_wait_flags
) override
;
432 bool has_pending_events () override
;
434 void fetch_registers (struct regcache
*, int) override
;
435 void store_registers (struct regcache
*, int) override
;
436 void prepare_to_store (struct regcache
*) override
;
438 void files_info () override
;
440 int insert_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
442 int remove_breakpoint (struct gdbarch
*, struct bp_target_info
*,
443 enum remove_bp_reason
) override
;
446 bool stopped_by_sw_breakpoint () override
;
447 bool supports_stopped_by_sw_breakpoint () override
;
449 bool stopped_by_hw_breakpoint () override
;
451 bool supports_stopped_by_hw_breakpoint () override
;
453 bool stopped_by_watchpoint () override
;
455 bool stopped_data_address (CORE_ADDR
*) override
;
457 bool watchpoint_addr_within_range (CORE_ADDR
, CORE_ADDR
, int) override
;
459 int can_use_hw_breakpoint (enum bptype
, int, int) override
;
461 int insert_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
463 int remove_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
465 int region_ok_for_hw_watchpoint (CORE_ADDR
, int) override
;
467 int insert_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
468 struct expression
*) override
;
470 int remove_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
471 struct expression
*) override
;
473 void kill () override
;
475 void load (const char *, int) override
;
477 void mourn_inferior () override
;
479 void pass_signals (gdb::array_view
<const unsigned char>) override
;
481 int set_syscall_catchpoint (int, bool, int,
482 gdb::array_view
<const int>) override
;
484 void program_signals (gdb::array_view
<const unsigned char>) override
;
486 bool thread_alive (ptid_t ptid
) override
;
488 const char *thread_name (struct thread_info
*) override
;
490 void update_thread_list () override
;
492 std::string
pid_to_str (ptid_t
) override
;
494 const char *extra_thread_info (struct thread_info
*) override
;
496 ptid_t
get_ada_task_ptid (long lwp
, long thread
) override
;
498 thread_info
*thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
500 inferior
*inf
) override
;
502 gdb::byte_vector
thread_info_to_thread_handle (struct thread_info
*tp
)
505 void stop (ptid_t
) override
;
507 void interrupt () override
;
509 void pass_ctrlc () override
;
511 enum target_xfer_status
xfer_partial (enum target_object object
,
514 const gdb_byte
*writebuf
,
515 ULONGEST offset
, ULONGEST len
,
516 ULONGEST
*xfered_len
) override
;
518 ULONGEST
get_memory_xfer_limit () override
;
520 void rcmd (const char *command
, struct ui_file
*output
) override
;
522 char *pid_to_exec_file (int pid
) override
;
524 void log_command (const char *cmd
) override
526 serial_log_command (this, cmd
);
529 CORE_ADDR
get_thread_local_address (ptid_t ptid
,
530 CORE_ADDR load_module_addr
,
531 CORE_ADDR offset
) override
;
533 bool can_execute_reverse () override
;
535 std::vector
<mem_region
> memory_map () override
;
537 void flash_erase (ULONGEST address
, LONGEST length
) override
;
539 void flash_done () override
;
541 const struct target_desc
*read_description () override
;
543 int search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
544 const gdb_byte
*pattern
, ULONGEST pattern_len
,
545 CORE_ADDR
*found_addrp
) override
;
547 bool can_async_p () override
;
549 bool is_async_p () override
;
551 void async (int) override
;
553 int async_wait_fd () override
;
555 void thread_events (int) override
;
557 int can_do_single_step () override
;
559 void terminal_inferior () override
;
561 void terminal_ours () override
;
563 bool supports_non_stop () override
;
565 bool supports_multi_process () override
;
567 bool supports_disable_randomization () override
;
569 bool filesystem_is_local () override
;
572 int fileio_open (struct inferior
*inf
, const char *filename
,
573 int flags
, int mode
, int warn_if_slow
,
574 int *target_errno
) override
;
576 int fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
577 ULONGEST offset
, int *target_errno
) override
;
579 int fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
580 ULONGEST offset
, int *target_errno
) override
;
582 int fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
) override
;
584 int fileio_close (int fd
, int *target_errno
) override
;
586 int fileio_unlink (struct inferior
*inf
,
587 const char *filename
,
588 int *target_errno
) override
;
590 gdb::optional
<std::string
>
591 fileio_readlink (struct inferior
*inf
,
592 const char *filename
,
593 int *target_errno
) override
;
595 bool supports_enable_disable_tracepoint () override
;
597 bool supports_string_tracing () override
;
599 bool supports_evaluation_of_breakpoint_conditions () override
;
601 bool can_run_breakpoint_commands () override
;
603 void trace_init () override
;
605 void download_tracepoint (struct bp_location
*location
) override
;
607 bool can_download_tracepoint () override
;
609 void download_trace_state_variable (const trace_state_variable
&tsv
) override
;
611 void enable_tracepoint (struct bp_location
*location
) override
;
613 void disable_tracepoint (struct bp_location
*location
) override
;
615 void trace_set_readonly_regions () override
;
617 void trace_start () override
;
619 int get_trace_status (struct trace_status
*ts
) override
;
621 void get_tracepoint_status (struct breakpoint
*tp
, struct uploaded_tp
*utp
)
624 void trace_stop () override
;
626 int trace_find (enum trace_find_type type
, int num
,
627 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
) override
;
629 bool get_trace_state_variable_value (int tsv
, LONGEST
*val
) override
;
631 int save_trace_data (const char *filename
) override
;
633 int upload_tracepoints (struct uploaded_tp
**utpp
) override
;
635 int upload_trace_state_variables (struct uploaded_tsv
**utsvp
) override
;
637 LONGEST
get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
) override
;
639 int get_min_fast_tracepoint_insn_len () override
;
641 void set_disconnected_tracing (int val
) override
;
643 void set_circular_trace_buffer (int val
) override
;
645 void set_trace_buffer_size (LONGEST val
) override
;
647 bool set_trace_notes (const char *user
, const char *notes
,
648 const char *stopnotes
) override
;
650 int core_of_thread (ptid_t ptid
) override
;
652 int verify_memory (const gdb_byte
*data
,
653 CORE_ADDR memaddr
, ULONGEST size
) override
;
656 bool get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
) override
;
658 void set_permissions () override
;
660 bool static_tracepoint_marker_at (CORE_ADDR
,
661 struct static_tracepoint_marker
*marker
)
664 std::vector
<static_tracepoint_marker
>
665 static_tracepoint_markers_by_strid (const char *id
) override
;
667 traceframe_info_up
traceframe_info () override
;
669 bool use_agent (bool use
) override
;
670 bool can_use_agent () override
;
672 struct btrace_target_info
*enable_btrace (ptid_t ptid
,
673 const struct btrace_config
*conf
) override
;
675 void disable_btrace (struct btrace_target_info
*tinfo
) override
;
677 void teardown_btrace (struct btrace_target_info
*tinfo
) override
;
679 enum btrace_error
read_btrace (struct btrace_data
*data
,
680 struct btrace_target_info
*btinfo
,
681 enum btrace_read_type type
) override
;
683 const struct btrace_config
*btrace_conf (const struct btrace_target_info
*) override
;
684 bool augmented_libraries_svr4_read () override
;
685 void follow_fork (bool, bool) override
;
686 void follow_exec (inferior
*, ptid_t
, const char *) override
;
687 int insert_fork_catchpoint (int) override
;
688 int remove_fork_catchpoint (int) override
;
689 int insert_vfork_catchpoint (int) override
;
690 int remove_vfork_catchpoint (int) override
;
691 int insert_exec_catchpoint (int) override
;
692 int remove_exec_catchpoint (int) override
;
693 enum exec_direction_kind
execution_direction () override
;
695 bool supports_memory_tagging () override
;
697 bool fetch_memtags (CORE_ADDR address
, size_t len
,
698 gdb::byte_vector
&tags
, int type
) override
;
700 bool store_memtags (CORE_ADDR address
, size_t len
,
701 const gdb::byte_vector
&tags
, int type
) override
;
703 public: /* Remote specific methods. */
705 void remote_download_command_source (int num
, ULONGEST addr
,
706 struct command_line
*cmds
);
708 void remote_file_put (const char *local_file
, const char *remote_file
,
710 void remote_file_get (const char *remote_file
, const char *local_file
,
712 void remote_file_delete (const char *remote_file
, int from_tty
);
714 int remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
715 ULONGEST offset
, int *remote_errno
);
716 int remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
717 ULONGEST offset
, int *remote_errno
);
718 int remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
719 ULONGEST offset
, int *remote_errno
);
721 int remote_hostio_send_command (int command_bytes
, int which_packet
,
722 int *remote_errno
, const char **attachment
,
723 int *attachment_len
);
724 int remote_hostio_set_filesystem (struct inferior
*inf
,
726 /* We should get rid of this and use fileio_open directly. */
727 int remote_hostio_open (struct inferior
*inf
, const char *filename
,
728 int flags
, int mode
, int warn_if_slow
,
730 int remote_hostio_close (int fd
, int *remote_errno
);
732 int remote_hostio_unlink (inferior
*inf
, const char *filename
,
735 struct remote_state
*get_remote_state ();
737 long get_remote_packet_size (void);
738 long get_memory_packet_size (struct memory_packet_config
*config
);
740 long get_memory_write_packet_size ();
741 long get_memory_read_packet_size ();
743 char *append_pending_thread_resumptions (char *p
, char *endp
,
745 static void open_1 (const char *name
, int from_tty
, int extended_p
);
746 void start_remote (int from_tty
, int extended_p
);
747 void remote_detach_1 (struct inferior
*inf
, int from_tty
);
749 char *append_resumption (char *p
, char *endp
,
750 ptid_t ptid
, int step
, gdb_signal siggnal
);
751 int remote_resume_with_vcont (ptid_t ptid
, int step
,
754 thread_info
*add_current_inferior_and_thread (const char *wait_status
);
756 ptid_t
wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
757 target_wait_flags options
);
758 ptid_t
wait_as (ptid_t ptid
, target_waitstatus
*status
,
759 target_wait_flags options
);
761 ptid_t
process_stop_reply (struct stop_reply
*stop_reply
,
762 target_waitstatus
*status
);
764 ptid_t select_thread_for_ambiguous_stop_reply
765 (const struct target_waitstatus
*status
);
767 void remote_notice_new_inferior (ptid_t currthread
, bool executing
);
769 void process_initial_stop_replies (int from_tty
);
771 thread_info
*remote_add_thread (ptid_t ptid
, bool running
, bool executing
);
773 void btrace_sync_conf (const btrace_config
*conf
);
775 void remote_btrace_maybe_reopen ();
777 void remove_new_fork_children (threads_listing_context
*context
);
778 void kill_new_fork_children (int pid
);
779 void discard_pending_stop_replies (struct inferior
*inf
);
780 int stop_reply_queue_length ();
782 void check_pending_events_prevent_wildcard_vcont
783 (bool *may_global_wildcard_vcont
);
785 void discard_pending_stop_replies_in_queue ();
786 struct stop_reply
*remote_notif_remove_queued_reply (ptid_t ptid
);
787 struct stop_reply
*queued_stop_reply (ptid_t ptid
);
788 int peek_stop_reply (ptid_t ptid
);
789 void remote_parse_stop_reply (const char *buf
, stop_reply
*event
);
791 void remote_stop_ns (ptid_t ptid
);
792 void remote_interrupt_as ();
793 void remote_interrupt_ns ();
795 char *remote_get_noisy_reply ();
796 int remote_query_attached (int pid
);
797 inferior
*remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
800 ptid_t
remote_current_thread (ptid_t oldpid
);
801 ptid_t
get_current_thread (const char *wait_status
);
803 void set_thread (ptid_t ptid
, int gen
);
804 void set_general_thread (ptid_t ptid
);
805 void set_continue_thread (ptid_t ptid
);
806 void set_general_process ();
808 char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
810 int remote_unpack_thread_info_response (const char *pkt
, threadref
*expectedref
,
811 gdb_ext_thread_info
*info
);
812 int remote_get_threadinfo (threadref
*threadid
, int fieldset
,
813 gdb_ext_thread_info
*info
);
815 int parse_threadlist_response (const char *pkt
, int result_limit
,
816 threadref
*original_echo
,
817 threadref
*resultlist
,
819 int remote_get_threadlist (int startflag
, threadref
*nextthread
,
820 int result_limit
, int *done
, int *result_count
,
821 threadref
*threadlist
);
823 int remote_threadlist_iterator (rmt_thread_action stepfunction
,
824 void *context
, int looplimit
);
826 int remote_get_threads_with_ql (threads_listing_context
*context
);
827 int remote_get_threads_with_qxfer (threads_listing_context
*context
);
828 int remote_get_threads_with_qthreadinfo (threads_listing_context
*context
);
830 void extended_remote_restart ();
834 void remote_check_symbols ();
836 void remote_supported_packet (const struct protocol_feature
*feature
,
837 enum packet_support support
,
838 const char *argument
);
840 void remote_query_supported ();
842 void remote_packet_size (const protocol_feature
*feature
,
843 packet_support support
, const char *value
);
845 void remote_serial_quit_handler ();
847 void remote_detach_pid (int pid
);
849 void remote_vcont_probe ();
851 void remote_resume_with_hc (ptid_t ptid
, int step
,
854 void send_interrupt_sequence ();
855 void interrupt_query ();
857 void remote_notif_get_pending_events (notif_client
*nc
);
859 int fetch_register_using_p (struct regcache
*regcache
,
861 int send_g_packet ();
862 void process_g_packet (struct regcache
*regcache
);
863 void fetch_registers_using_g (struct regcache
*regcache
);
864 int store_register_using_P (const struct regcache
*regcache
,
866 void store_registers_using_G (const struct regcache
*regcache
);
868 void set_remote_traceframe ();
870 void check_binary_download (CORE_ADDR addr
);
872 target_xfer_status
remote_write_bytes_aux (const char *header
,
874 const gdb_byte
*myaddr
,
877 ULONGEST
*xfered_len_units
,
881 target_xfer_status
remote_write_bytes (CORE_ADDR memaddr
,
882 const gdb_byte
*myaddr
, ULONGEST len
,
883 int unit_size
, ULONGEST
*xfered_len
);
885 target_xfer_status
remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
887 int unit_size
, ULONGEST
*xfered_len_units
);
889 target_xfer_status
remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
893 ULONGEST
*xfered_len
);
895 target_xfer_status
remote_read_bytes (CORE_ADDR memaddr
,
896 gdb_byte
*myaddr
, ULONGEST len
,
898 ULONGEST
*xfered_len
);
900 packet_result
remote_send_printf (const char *format
, ...)
901 ATTRIBUTE_PRINTF (2, 3);
903 target_xfer_status
remote_flash_write (ULONGEST address
,
904 ULONGEST length
, ULONGEST
*xfered_len
,
905 const gdb_byte
*data
);
907 int readchar (int timeout
);
909 void remote_serial_write (const char *str
, int len
);
911 int putpkt (const char *buf
);
912 int putpkt_binary (const char *buf
, int cnt
);
914 int putpkt (const gdb::char_vector
&buf
)
916 return putpkt (buf
.data ());
920 long read_frame (gdb::char_vector
*buf_p
);
921 void getpkt (gdb::char_vector
*buf
, int forever
);
922 int getpkt_or_notif_sane_1 (gdb::char_vector
*buf
, int forever
,
923 int expecting_notif
, int *is_notif
);
924 int getpkt_sane (gdb::char_vector
*buf
, int forever
);
925 int getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
927 int remote_vkill (int pid
);
928 void remote_kill_k ();
930 void extended_remote_disable_randomization (int val
);
931 int extended_remote_run (const std::string
&args
);
933 void send_environment_packet (const char *action
,
937 void extended_remote_environment_support ();
938 void extended_remote_set_inferior_cwd ();
940 target_xfer_status
remote_write_qxfer (const char *object_name
,
942 const gdb_byte
*writebuf
,
943 ULONGEST offset
, LONGEST len
,
944 ULONGEST
*xfered_len
,
945 struct packet_config
*packet
);
947 target_xfer_status
remote_read_qxfer (const char *object_name
,
949 gdb_byte
*readbuf
, ULONGEST offset
,
951 ULONGEST
*xfered_len
,
952 struct packet_config
*packet
);
954 void push_stop_reply (struct stop_reply
*new_event
);
956 bool vcont_r_supported ();
958 void packet_command (const char *args
, int from_tty
);
960 private: /* data fields */
962 /* The remote state. Don't reference this directly. Use the
963 get_remote_state method instead. */
964 remote_state m_remote_state
;
967 static const target_info extended_remote_target_info
= {
969 N_("Extended remote serial target in gdb-specific protocol"),
973 /* Set up the extended remote target by extending the standard remote
974 target and adding to it. */
976 class extended_remote_target final
: public remote_target
979 const target_info
&info () const override
980 { return extended_remote_target_info
; }
982 /* Open an extended-remote connection. */
983 static void open (const char *, int);
985 bool can_create_inferior () override
{ return true; }
986 void create_inferior (const char *, const std::string
&,
987 char **, int) override
;
989 void detach (inferior
*, int) override
;
991 bool can_attach () override
{ return true; }
992 void attach (const char *, int) override
;
994 void post_attach (int) override
;
995 bool supports_disable_randomization () override
;
998 /* Per-program-space data key. */
999 static const struct program_space_key
<char, gdb::xfree_deleter
<char>>
1002 /* The variable registered as the control variable used by the
1003 remote exec-file commands. While the remote exec-file setting is
1004 per-program-space, the set/show machinery uses this as the
1005 location of the remote exec-file value. */
1006 static char *remote_exec_file_var
;
1008 /* The size to align memory write packets, when practical. The protocol
1009 does not guarantee any alignment, and gdb will generate short
1010 writes and unaligned writes, but even as a best-effort attempt this
1011 can improve bulk transfers. For instance, if a write is misaligned
1012 relative to the target's data bus, the stub may need to make an extra
1013 round trip fetching data from the target. This doesn't make a
1014 huge difference, but it's easy to do, so we try to be helpful.
1016 The alignment chosen is arbitrary; usually data bus width is
1017 important here, not the possibly larger cache line size. */
1018 enum { REMOTE_ALIGN_WRITES
= 16 };
1020 /* Prototypes for local functions. */
1022 static int hexnumlen (ULONGEST num
);
1024 static int stubhex (int ch
);
1026 static int hexnumstr (char *, ULONGEST
);
1028 static int hexnumnstr (char *, ULONGEST
, int);
1030 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
1032 static void print_packet (const char *);
1034 static int stub_unpack_int (const char *buff
, int fieldlength
);
1036 struct packet_config
;
1038 static void show_packet_config_cmd (struct packet_config
*config
);
1040 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
1042 struct cmd_list_element
*c
,
1045 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
1047 static void remote_async_inferior_event_handler (gdb_client_data
);
1049 static bool remote_read_description_p (struct target_ops
*target
);
1051 static void remote_console_output (const char *msg
);
1053 static void remote_btrace_reset (remote_state
*rs
);
1055 static void remote_unpush_and_throw (remote_target
*target
);
1059 static struct cmd_list_element
*remote_cmdlist
;
1061 /* For "set remote" and "show remote". */
1063 static struct cmd_list_element
*remote_set_cmdlist
;
1064 static struct cmd_list_element
*remote_show_cmdlist
;
1066 /* Controls whether GDB is willing to use range stepping. */
1068 static bool use_range_stepping
= true;
1070 /* From the remote target's point of view, each thread is in one of these three
1072 enum class resume_state
1074 /* Not resumed - we haven't been asked to resume this thread. */
1077 /* We have been asked to resume this thread, but haven't sent a vCont action
1078 for it yet. We'll need to consider it next time commit_resume is
1080 RESUMED_PENDING_VCONT
,
1082 /* We have been asked to resume this thread, and we have sent a vCont action
1087 /* Information about a thread's pending vCont-resume. Used when a thread is in
1088 the remote_resume_state::RESUMED_PENDING_VCONT state. remote_target::resume
1089 stores this information which is then picked up by
1090 remote_target::commit_resume to know which is the proper action for this
1091 thread to include in the vCont packet. */
1092 struct resumed_pending_vcont_info
1094 /* True if the last resume call for this thread was a step request, false
1095 if a continue request. */
1098 /* The signal specified in the last resume call for this thread. */
1102 /* Private data that we'll store in (struct thread_info)->priv. */
1103 struct remote_thread_info
: public private_thread_info
1109 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1110 sequence of bytes. */
1111 gdb::byte_vector thread_handle
;
1113 /* Whether the target stopped for a breakpoint/watchpoint. */
1114 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1116 /* This is set to the data address of the access causing the target
1117 to stop for a watchpoint. */
1118 CORE_ADDR watch_data_address
= 0;
1120 /* Get the thread's resume state. */
1121 enum resume_state
get_resume_state () const
1123 return m_resume_state
;
1126 /* Put the thread in the NOT_RESUMED state. */
1127 void set_not_resumed ()
1129 m_resume_state
= resume_state::NOT_RESUMED
;
1132 /* Put the thread in the RESUMED_PENDING_VCONT state. */
1133 void set_resumed_pending_vcont (bool step
, gdb_signal sig
)
1135 m_resume_state
= resume_state::RESUMED_PENDING_VCONT
;
1136 m_resumed_pending_vcont_info
.step
= step
;
1137 m_resumed_pending_vcont_info
.sig
= sig
;
1140 /* Get the information this thread's pending vCont-resumption.
1142 Must only be called if the thread is in the RESUMED_PENDING_VCONT resume
1144 const struct resumed_pending_vcont_info
&resumed_pending_vcont_info () const
1146 gdb_assert (m_resume_state
== resume_state::RESUMED_PENDING_VCONT
);
1148 return m_resumed_pending_vcont_info
;
1151 /* Put the thread in the VCONT_RESUMED state. */
1154 m_resume_state
= resume_state::RESUMED
;
1158 /* Resume state for this thread. This is used to implement vCont action
1159 coalescing (only when the target operates in non-stop mode).
1161 remote_target::resume moves the thread to the RESUMED_PENDING_VCONT state,
1162 which notes that this thread must be considered in the next commit_resume
1165 remote_target::commit_resume sends a vCont packet with actions for the
1166 threads in the RESUMED_PENDING_VCONT state and moves them to the
1167 VCONT_RESUMED state.
1169 When reporting a stop to the core for a thread, that thread is moved back
1170 to the NOT_RESUMED state. */
1171 enum resume_state m_resume_state
= resume_state::NOT_RESUMED
;
1173 /* Extra info used if the thread is in the RESUMED_PENDING_VCONT state. */
1174 struct resumed_pending_vcont_info m_resumed_pending_vcont_info
;
1177 remote_state::remote_state ()
1182 remote_state::~remote_state ()
1184 xfree (this->last_pass_packet
);
1185 xfree (this->last_program_signals_packet
);
1186 xfree (this->finished_object
);
1187 xfree (this->finished_annex
);
1190 /* Utility: generate error from an incoming stub packet. */
1192 trace_error (char *buf
)
1195 return; /* not an error msg */
1198 case '1': /* malformed packet error */
1199 if (*++buf
== '0') /* general case: */
1200 error (_("remote.c: error in outgoing packet."));
1202 error (_("remote.c: error in outgoing packet at field #%ld."),
1203 strtol (buf
, NULL
, 16));
1205 error (_("Target returns error code '%s'."), buf
);
1209 /* Utility: wait for reply from stub, while accepting "O" packets. */
1212 remote_target::remote_get_noisy_reply ()
1214 struct remote_state
*rs
= get_remote_state ();
1216 do /* Loop on reply from remote stub. */
1220 QUIT
; /* Allow user to bail out with ^C. */
1221 getpkt (&rs
->buf
, 0);
1222 buf
= rs
->buf
.data ();
1225 else if (startswith (buf
, "qRelocInsn:"))
1228 CORE_ADDR from
, to
, org_to
;
1230 int adjusted_size
= 0;
1233 p
= buf
+ strlen ("qRelocInsn:");
1234 pp
= unpack_varlen_hex (p
, &ul
);
1236 error (_("invalid qRelocInsn packet: %s"), buf
);
1240 unpack_varlen_hex (p
, &ul
);
1247 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
1250 catch (const gdb_exception
&ex
)
1252 if (ex
.error
== MEMORY_ERROR
)
1254 /* Propagate memory errors silently back to the
1255 target. The stub may have limited the range of
1256 addresses we can write to, for example. */
1260 /* Something unexpectedly bad happened. Be verbose
1261 so we can tell what, and propagate the error back
1262 to the stub, so it doesn't get stuck waiting for
1264 exception_fprintf (gdb_stderr
, ex
,
1265 _("warning: relocating instruction: "));
1272 adjusted_size
= to
- org_to
;
1274 xsnprintf (buf
, rs
->buf
.size (), "qRelocInsn:%x", adjusted_size
);
1278 else if (buf
[0] == 'O' && buf
[1] != 'K')
1279 remote_console_output (buf
+ 1); /* 'O' message from stub */
1281 return buf
; /* Here's the actual reply. */
1286 struct remote_arch_state
*
1287 remote_state::get_remote_arch_state (struct gdbarch
*gdbarch
)
1289 remote_arch_state
*rsa
;
1291 auto it
= this->m_arch_states
.find (gdbarch
);
1292 if (it
== this->m_arch_states
.end ())
1294 auto p
= this->m_arch_states
.emplace (std::piecewise_construct
,
1295 std::forward_as_tuple (gdbarch
),
1296 std::forward_as_tuple (gdbarch
));
1297 rsa
= &p
.first
->second
;
1299 /* Make sure that the packet buffer is plenty big enough for
1300 this architecture. */
1301 if (this->buf
.size () < rsa
->remote_packet_size
)
1302 this->buf
.resize (2 * rsa
->remote_packet_size
);
1310 /* Fetch the global remote target state. */
1313 remote_target::get_remote_state ()
1315 /* Make sure that the remote architecture state has been
1316 initialized, because doing so might reallocate rs->buf. Any
1317 function which calls getpkt also needs to be mindful of changes
1318 to rs->buf, but this call limits the number of places which run
1320 m_remote_state
.get_remote_arch_state (target_gdbarch ());
1322 return &m_remote_state
;
1325 /* Fetch the remote exec-file from the current program space. */
1328 get_remote_exec_file (void)
1330 char *remote_exec_file
;
1332 remote_exec_file
= remote_pspace_data
.get (current_program_space
);
1333 if (remote_exec_file
== NULL
)
1336 return remote_exec_file
;
1339 /* Set the remote exec file for PSPACE. */
1342 set_pspace_remote_exec_file (struct program_space
*pspace
,
1343 const char *remote_exec_file
)
1345 char *old_file
= remote_pspace_data
.get (pspace
);
1348 remote_pspace_data
.set (pspace
, xstrdup (remote_exec_file
));
1351 /* The "set/show remote exec-file" set command hook. */
1354 set_remote_exec_file (const char *ignored
, int from_tty
,
1355 struct cmd_list_element
*c
)
1357 gdb_assert (remote_exec_file_var
!= NULL
);
1358 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
1361 /* The "set/show remote exec-file" show command hook. */
1364 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
1365 struct cmd_list_element
*cmd
, const char *value
)
1367 fprintf_filtered (file
, "%s\n", get_remote_exec_file ());
1371 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
1373 int regnum
, num_remote_regs
, offset
;
1374 struct packet_reg
**remote_regs
;
1376 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
1378 struct packet_reg
*r
= ®s
[regnum
];
1380 if (register_size (gdbarch
, regnum
) == 0)
1381 /* Do not try to fetch zero-sized (placeholder) registers. */
1384 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
1389 /* Define the g/G packet format as the contents of each register
1390 with a remote protocol number, in order of ascending protocol
1393 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
1394 for (num_remote_regs
= 0, regnum
= 0;
1395 regnum
< gdbarch_num_regs (gdbarch
);
1397 if (regs
[regnum
].pnum
!= -1)
1398 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
1400 std::sort (remote_regs
, remote_regs
+ num_remote_regs
,
1401 [] (const packet_reg
*a
, const packet_reg
*b
)
1402 { return a
->pnum
< b
->pnum
; });
1404 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
1406 remote_regs
[regnum
]->in_g_packet
= 1;
1407 remote_regs
[regnum
]->offset
= offset
;
1408 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
1414 /* Given the architecture described by GDBARCH, return the remote
1415 protocol register's number and the register's offset in the g/G
1416 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1417 If the target does not have a mapping for REGNUM, return false,
1418 otherwise, return true. */
1421 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
1422 int *pnum
, int *poffset
)
1424 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
1426 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
1428 map_regcache_remote_table (gdbarch
, regs
.data ());
1430 *pnum
= regs
[regnum
].pnum
;
1431 *poffset
= regs
[regnum
].offset
;
1436 remote_arch_state::remote_arch_state (struct gdbarch
*gdbarch
)
1438 /* Use the architecture to build a regnum<->pnum table, which will be
1439 1:1 unless a feature set specifies otherwise. */
1440 this->regs
.reset (new packet_reg
[gdbarch_num_regs (gdbarch
)] ());
1442 /* Record the maximum possible size of the g packet - it may turn out
1444 this->sizeof_g_packet
1445 = map_regcache_remote_table (gdbarch
, this->regs
.get ());
1447 /* Default maximum number of characters in a packet body. Many
1448 remote stubs have a hardwired buffer size of 400 bytes
1449 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1450 as the maximum packet-size to ensure that the packet and an extra
1451 NUL character can always fit in the buffer. This stops GDB
1452 trashing stubs that try to squeeze an extra NUL into what is
1453 already a full buffer (As of 1999-12-04 that was most stubs). */
1454 this->remote_packet_size
= 400 - 1;
1456 /* This one is filled in when a ``g'' packet is received. */
1457 this->actual_register_packet_size
= 0;
1459 /* Should rsa->sizeof_g_packet needs more space than the
1460 default, adjust the size accordingly. Remember that each byte is
1461 encoded as two characters. 32 is the overhead for the packet
1462 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1463 (``$NN:G...#NN'') is a better guess, the below has been padded a
1465 if (this->sizeof_g_packet
> ((this->remote_packet_size
- 32) / 2))
1466 this->remote_packet_size
= (this->sizeof_g_packet
* 2 + 32);
1469 /* Get a pointer to the current remote target. If not connected to a
1470 remote target, return NULL. */
1472 static remote_target
*
1473 get_current_remote_target ()
1475 target_ops
*proc_target
= current_inferior ()->process_target ();
1476 return dynamic_cast<remote_target
*> (proc_target
);
1479 /* Return the current allowed size of a remote packet. This is
1480 inferred from the current architecture, and should be used to
1481 limit the length of outgoing packets. */
1483 remote_target::get_remote_packet_size ()
1485 struct remote_state
*rs
= get_remote_state ();
1486 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1488 if (rs
->explicit_packet_size
)
1489 return rs
->explicit_packet_size
;
1491 return rsa
->remote_packet_size
;
1494 static struct packet_reg
*
1495 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1498 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
1502 struct packet_reg
*r
= &rsa
->regs
[regnum
];
1504 gdb_assert (r
->regnum
== regnum
);
1509 static struct packet_reg
*
1510 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1515 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
1517 struct packet_reg
*r
= &rsa
->regs
[i
];
1519 if (r
->pnum
== pnum
)
1525 /* Allow the user to specify what sequence to send to the remote
1526 when he requests a program interruption: Although ^C is usually
1527 what remote systems expect (this is the default, here), it is
1528 sometimes preferable to send a break. On other systems such
1529 as the Linux kernel, a break followed by g, which is Magic SysRq g
1530 is required in order to interrupt the execution. */
1531 const char interrupt_sequence_control_c
[] = "Ctrl-C";
1532 const char interrupt_sequence_break
[] = "BREAK";
1533 const char interrupt_sequence_break_g
[] = "BREAK-g";
1534 static const char *const interrupt_sequence_modes
[] =
1536 interrupt_sequence_control_c
,
1537 interrupt_sequence_break
,
1538 interrupt_sequence_break_g
,
1541 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
1544 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
1545 struct cmd_list_element
*c
,
1548 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
1549 fprintf_filtered (file
,
1550 _("Send the ASCII ETX character (Ctrl-c) "
1551 "to the remote target to interrupt the "
1552 "execution of the program.\n"));
1553 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
1554 fprintf_filtered (file
,
1555 _("send a break signal to the remote target "
1556 "to interrupt the execution of the program.\n"));
1557 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
1558 fprintf_filtered (file
,
1559 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1560 "the remote target to interrupt the execution "
1561 "of Linux kernel.\n"));
1563 internal_error (__FILE__
, __LINE__
,
1564 _("Invalid value for interrupt_sequence_mode: %s."),
1565 interrupt_sequence_mode
);
1568 /* This boolean variable specifies whether interrupt_sequence is sent
1569 to the remote target when gdb connects to it.
1570 This is mostly needed when you debug the Linux kernel: The Linux kernel
1571 expects BREAK g which is Magic SysRq g for connecting gdb. */
1572 static bool interrupt_on_connect
= false;
1574 /* This variable is used to implement the "set/show remotebreak" commands.
1575 Since these commands are now deprecated in favor of "set/show remote
1576 interrupt-sequence", it no longer has any effect on the code. */
1577 static bool remote_break
;
1580 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1583 interrupt_sequence_mode
= interrupt_sequence_break
;
1585 interrupt_sequence_mode
= interrupt_sequence_control_c
;
1589 show_remotebreak (struct ui_file
*file
, int from_tty
,
1590 struct cmd_list_element
*c
,
1595 /* This variable sets the number of bits in an address that are to be
1596 sent in a memory ("M" or "m") packet. Normally, after stripping
1597 leading zeros, the entire address would be sent. This variable
1598 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1599 initial implementation of remote.c restricted the address sent in
1600 memory packets to ``host::sizeof long'' bytes - (typically 32
1601 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1602 address was never sent. Since fixing this bug may cause a break in
1603 some remote targets this variable is principally provided to
1604 facilitate backward compatibility. */
1606 static unsigned int remote_address_size
;
1609 /* User configurable variables for the number of characters in a
1610 memory read/write packet. MIN (rsa->remote_packet_size,
1611 rsa->sizeof_g_packet) is the default. Some targets need smaller
1612 values (fifo overruns, et.al.) and some users need larger values
1613 (speed up transfers). The variables ``preferred_*'' (the user
1614 request), ``current_*'' (what was actually set) and ``forced_*''
1615 (Positive - a soft limit, negative - a hard limit). */
1617 struct memory_packet_config
1624 /* The default max memory-write-packet-size, when the setting is
1625 "fixed". The 16k is historical. (It came from older GDB's using
1626 alloca for buffers and the knowledge (folklore?) that some hosts
1627 don't cope very well with large alloca calls.) */
1628 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1630 /* The minimum remote packet size for memory transfers. Ensures we
1631 can write at least one byte. */
1632 #define MIN_MEMORY_PACKET_SIZE 20
1634 /* Get the memory packet size, assuming it is fixed. */
1637 get_fixed_memory_packet_size (struct memory_packet_config
*config
)
1639 gdb_assert (config
->fixed_p
);
1641 if (config
->size
<= 0)
1642 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
;
1644 return config
->size
;
1647 /* Compute the current size of a read/write packet. Since this makes
1648 use of ``actual_register_packet_size'' the computation is dynamic. */
1651 remote_target::get_memory_packet_size (struct memory_packet_config
*config
)
1653 struct remote_state
*rs
= get_remote_state ();
1654 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1657 if (config
->fixed_p
)
1658 what_they_get
= get_fixed_memory_packet_size (config
);
1661 what_they_get
= get_remote_packet_size ();
1662 /* Limit the packet to the size specified by the user. */
1663 if (config
->size
> 0
1664 && what_they_get
> config
->size
)
1665 what_they_get
= config
->size
;
1667 /* Limit it to the size of the targets ``g'' response unless we have
1668 permission from the stub to use a larger packet size. */
1669 if (rs
->explicit_packet_size
== 0
1670 && rsa
->actual_register_packet_size
> 0
1671 && what_they_get
> rsa
->actual_register_packet_size
)
1672 what_they_get
= rsa
->actual_register_packet_size
;
1674 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1675 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1677 /* Make sure there is room in the global buffer for this packet
1678 (including its trailing NUL byte). */
1679 if (rs
->buf
.size () < what_they_get
+ 1)
1680 rs
->buf
.resize (2 * what_they_get
);
1682 return what_they_get
;
1685 /* Update the size of a read/write packet. If they user wants
1686 something really big then do a sanity check. */
1689 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1691 int fixed_p
= config
->fixed_p
;
1692 long size
= config
->size
;
1695 error (_("Argument required (integer, `fixed' or `limited')."));
1696 else if (strcmp (args
, "hard") == 0
1697 || strcmp (args
, "fixed") == 0)
1699 else if (strcmp (args
, "soft") == 0
1700 || strcmp (args
, "limit") == 0)
1706 size
= strtoul (args
, &end
, 0);
1708 error (_("Invalid %s (bad syntax)."), config
->name
);
1710 /* Instead of explicitly capping the size of a packet to or
1711 disallowing it, the user is allowed to set the size to
1712 something arbitrarily large. */
1716 if (fixed_p
&& !config
->fixed_p
)
1718 /* So that the query shows the correct value. */
1719 long query_size
= (size
<= 0
1720 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1723 if (! query (_("The target may not be able to correctly handle a %s\n"
1724 "of %ld bytes. Change the packet size? "),
1725 config
->name
, query_size
))
1726 error (_("Packet size not changed."));
1728 /* Update the config. */
1729 config
->fixed_p
= fixed_p
;
1730 config
->size
= size
;
1734 show_memory_packet_size (struct memory_packet_config
*config
)
1736 if (config
->size
== 0)
1737 printf_filtered (_("The %s is 0 (default). "), config
->name
);
1739 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1740 if (config
->fixed_p
)
1741 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1742 get_fixed_memory_packet_size (config
));
1745 remote_target
*remote
= get_current_remote_target ();
1748 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1749 remote
->get_memory_packet_size (config
));
1751 puts_filtered ("The actual limit will be further reduced "
1752 "dependent on the target.\n");
1756 /* FIXME: needs to be per-remote-target. */
1757 static struct memory_packet_config memory_write_packet_config
=
1759 "memory-write-packet-size",
1763 set_memory_write_packet_size (const char *args
, int from_tty
)
1765 set_memory_packet_size (args
, &memory_write_packet_config
);
1769 show_memory_write_packet_size (const char *args
, int from_tty
)
1771 show_memory_packet_size (&memory_write_packet_config
);
1774 /* Show the number of hardware watchpoints that can be used. */
1777 show_hardware_watchpoint_limit (struct ui_file
*file
, int from_tty
,
1778 struct cmd_list_element
*c
,
1781 fprintf_filtered (file
, _("The maximum number of target hardware "
1782 "watchpoints is %s.\n"), value
);
1785 /* Show the length limit (in bytes) for hardware watchpoints. */
1788 show_hardware_watchpoint_length_limit (struct ui_file
*file
, int from_tty
,
1789 struct cmd_list_element
*c
,
1792 fprintf_filtered (file
, _("The maximum length (in bytes) of a target "
1793 "hardware watchpoint is %s.\n"), value
);
1796 /* Show the number of hardware breakpoints that can be used. */
1799 show_hardware_breakpoint_limit (struct ui_file
*file
, int from_tty
,
1800 struct cmd_list_element
*c
,
1803 fprintf_filtered (file
, _("The maximum number of target hardware "
1804 "breakpoints is %s.\n"), value
);
1807 /* Controls the maximum number of characters to display in the debug output
1808 for each remote packet. The remaining characters are omitted. */
1810 static int remote_packet_max_chars
= 512;
1812 /* Show the maximum number of characters to display for each remote packet
1813 when remote debugging is enabled. */
1816 show_remote_packet_max_chars (struct ui_file
*file
, int from_tty
,
1817 struct cmd_list_element
*c
,
1820 fprintf_filtered (file
, _("Number of remote packet characters to "
1821 "display is %s.\n"), value
);
1825 remote_target::get_memory_write_packet_size ()
1827 return get_memory_packet_size (&memory_write_packet_config
);
1830 /* FIXME: needs to be per-remote-target. */
1831 static struct memory_packet_config memory_read_packet_config
=
1833 "memory-read-packet-size",
1837 set_memory_read_packet_size (const char *args
, int from_tty
)
1839 set_memory_packet_size (args
, &memory_read_packet_config
);
1843 show_memory_read_packet_size (const char *args
, int from_tty
)
1845 show_memory_packet_size (&memory_read_packet_config
);
1849 remote_target::get_memory_read_packet_size ()
1851 long size
= get_memory_packet_size (&memory_read_packet_config
);
1853 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1854 extra buffer size argument before the memory read size can be
1855 increased beyond this. */
1856 if (size
> get_remote_packet_size ())
1857 size
= get_remote_packet_size ();
1863 struct packet_config
1868 /* If auto, GDB auto-detects support for this packet or feature,
1869 either through qSupported, or by trying the packet and looking
1870 at the response. If true, GDB assumes the target supports this
1871 packet. If false, the packet is disabled. Configs that don't
1872 have an associated command always have this set to auto. */
1873 enum auto_boolean detect
;
1875 /* Does the target support this packet? */
1876 enum packet_support support
;
1879 static enum packet_support
packet_config_support (struct packet_config
*config
);
1880 static enum packet_support
packet_support (int packet
);
1883 show_packet_config_cmd (struct packet_config
*config
)
1885 const char *support
= "internal-error";
1887 switch (packet_config_support (config
))
1890 support
= "enabled";
1892 case PACKET_DISABLE
:
1893 support
= "disabled";
1895 case PACKET_SUPPORT_UNKNOWN
:
1896 support
= "unknown";
1899 switch (config
->detect
)
1901 case AUTO_BOOLEAN_AUTO
:
1902 printf_filtered (_("Support for the `%s' packet "
1903 "is auto-detected, currently %s.\n"),
1904 config
->name
, support
);
1906 case AUTO_BOOLEAN_TRUE
:
1907 case AUTO_BOOLEAN_FALSE
:
1908 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1909 config
->name
, support
);
1915 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1916 const char *title
, int legacy
)
1922 config
->name
= name
;
1923 config
->title
= title
;
1924 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet.",
1926 show_doc
= xstrprintf ("Show current use of remote "
1927 "protocol `%s' (%s) packet.",
1929 /* set/show TITLE-packet {auto,on,off} */
1930 cmd_name
= xstrprintf ("%s-packet", title
);
1931 set_show_commands cmds
1932 = add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1933 &config
->detect
, set_doc
,
1934 show_doc
, NULL
, /* help_doc */
1936 show_remote_protocol_packet_cmd
,
1937 &remote_set_cmdlist
, &remote_show_cmdlist
);
1939 /* The command code copies the documentation strings. */
1943 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1948 legacy_name
= xstrprintf ("%s-packet", name
);
1949 add_alias_cmd (legacy_name
, cmds
.set
, class_obscure
, 0,
1950 &remote_set_cmdlist
);
1951 add_alias_cmd (legacy_name
, cmds
.show
, class_obscure
, 0,
1952 &remote_show_cmdlist
);
1956 static enum packet_result
1957 packet_check_result (const char *buf
)
1961 /* The stub recognized the packet request. Check that the
1962 operation succeeded. */
1964 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1966 /* "Enn" - definitely an error. */
1967 return PACKET_ERROR
;
1969 /* Always treat "E." as an error. This will be used for
1970 more verbose error messages, such as E.memtypes. */
1971 if (buf
[0] == 'E' && buf
[1] == '.')
1972 return PACKET_ERROR
;
1974 /* The packet may or may not be OK. Just assume it is. */
1978 /* The stub does not support the packet. */
1979 return PACKET_UNKNOWN
;
1982 static enum packet_result
1983 packet_check_result (const gdb::char_vector
&buf
)
1985 return packet_check_result (buf
.data ());
1988 static enum packet_result
1989 packet_ok (const char *buf
, struct packet_config
*config
)
1991 enum packet_result result
;
1993 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1994 && config
->support
== PACKET_DISABLE
)
1995 internal_error (__FILE__
, __LINE__
,
1996 _("packet_ok: attempt to use a disabled packet"));
1998 result
= packet_check_result (buf
);
2003 /* The stub recognized the packet request. */
2004 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
2006 remote_debug_printf ("Packet %s (%s) is supported",
2007 config
->name
, config
->title
);
2008 config
->support
= PACKET_ENABLE
;
2011 case PACKET_UNKNOWN
:
2012 /* The stub does not support the packet. */
2013 if (config
->detect
== AUTO_BOOLEAN_AUTO
2014 && config
->support
== PACKET_ENABLE
)
2016 /* If the stub previously indicated that the packet was
2017 supported then there is a protocol error. */
2018 error (_("Protocol error: %s (%s) conflicting enabled responses."),
2019 config
->name
, config
->title
);
2021 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
2023 /* The user set it wrong. */
2024 error (_("Enabled packet %s (%s) not recognized by stub"),
2025 config
->name
, config
->title
);
2028 remote_debug_printf ("Packet %s (%s) is NOT supported",
2029 config
->name
, config
->title
);
2030 config
->support
= PACKET_DISABLE
;
2037 static enum packet_result
2038 packet_ok (const gdb::char_vector
&buf
, struct packet_config
*config
)
2040 return packet_ok (buf
.data (), config
);
2057 PACKET_vFile_pwrite
,
2059 PACKET_vFile_unlink
,
2060 PACKET_vFile_readlink
,
2063 PACKET_qXfer_features
,
2064 PACKET_qXfer_exec_file
,
2065 PACKET_qXfer_libraries
,
2066 PACKET_qXfer_libraries_svr4
,
2067 PACKET_qXfer_memory_map
,
2068 PACKET_qXfer_osdata
,
2069 PACKET_qXfer_threads
,
2070 PACKET_qXfer_statictrace_read
,
2071 PACKET_qXfer_traceframe_info
,
2077 PACKET_QPassSignals
,
2078 PACKET_QCatchSyscalls
,
2079 PACKET_QProgramSignals
,
2080 PACKET_QSetWorkingDir
,
2081 PACKET_QStartupWithShell
,
2082 PACKET_QEnvironmentHexEncoded
,
2083 PACKET_QEnvironmentReset
,
2084 PACKET_QEnvironmentUnset
,
2086 PACKET_qSearch_memory
,
2089 PACKET_QStartNoAckMode
,
2091 PACKET_qXfer_siginfo_read
,
2092 PACKET_qXfer_siginfo_write
,
2095 /* Support for conditional tracepoints. */
2096 PACKET_ConditionalTracepoints
,
2098 /* Support for target-side breakpoint conditions. */
2099 PACKET_ConditionalBreakpoints
,
2101 /* Support for target-side breakpoint commands. */
2102 PACKET_BreakpointCommands
,
2104 /* Support for fast tracepoints. */
2105 PACKET_FastTracepoints
,
2107 /* Support for static tracepoints. */
2108 PACKET_StaticTracepoints
,
2110 /* Support for installing tracepoints while a trace experiment is
2112 PACKET_InstallInTrace
,
2116 PACKET_TracepointSource
,
2119 PACKET_QDisableRandomization
,
2121 PACKET_QTBuffer_size
,
2125 PACKET_qXfer_btrace
,
2127 /* Support for the QNonStop packet. */
2130 /* Support for the QThreadEvents packet. */
2131 PACKET_QThreadEvents
,
2133 /* Support for multi-process extensions. */
2134 PACKET_multiprocess_feature
,
2136 /* Support for enabling and disabling tracepoints while a trace
2137 experiment is running. */
2138 PACKET_EnableDisableTracepoints_feature
,
2140 /* Support for collecting strings using the tracenz bytecode. */
2141 PACKET_tracenz_feature
,
2143 /* Support for continuing to run a trace experiment while GDB is
2145 PACKET_DisconnectedTracing_feature
,
2147 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2148 PACKET_augmented_libraries_svr4_read_feature
,
2150 /* Support for the qXfer:btrace-conf:read packet. */
2151 PACKET_qXfer_btrace_conf
,
2153 /* Support for the Qbtrace-conf:bts:size packet. */
2154 PACKET_Qbtrace_conf_bts_size
,
2156 /* Support for swbreak+ feature. */
2157 PACKET_swbreak_feature
,
2159 /* Support for hwbreak+ feature. */
2160 PACKET_hwbreak_feature
,
2162 /* Support for fork events. */
2163 PACKET_fork_event_feature
,
2165 /* Support for vfork events. */
2166 PACKET_vfork_event_feature
,
2168 /* Support for the Qbtrace-conf:pt:size packet. */
2169 PACKET_Qbtrace_conf_pt_size
,
2171 /* Support for exec events. */
2172 PACKET_exec_event_feature
,
2174 /* Support for query supported vCont actions. */
2175 PACKET_vContSupported
,
2177 /* Support remote CTRL-C. */
2180 /* Support TARGET_WAITKIND_NO_RESUMED. */
2183 /* Support for memory tagging, allocation tag fetch/store
2184 packets and the tag violation stop replies. */
2185 PACKET_memory_tagging_feature
,
2190 /* FIXME: needs to be per-remote-target. Ignoring this for now,
2191 assuming all remote targets are the same server (thus all support
2192 the same packets). */
2193 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
2195 /* Returns the packet's corresponding "set remote foo-packet" command
2196 state. See struct packet_config for more details. */
2198 static enum auto_boolean
2199 packet_set_cmd_state (int packet
)
2201 return remote_protocol_packets
[packet
].detect
;
2204 /* Returns whether a given packet or feature is supported. This takes
2205 into account the state of the corresponding "set remote foo-packet"
2206 command, which may be used to bypass auto-detection. */
2208 static enum packet_support
2209 packet_config_support (struct packet_config
*config
)
2211 switch (config
->detect
)
2213 case AUTO_BOOLEAN_TRUE
:
2214 return PACKET_ENABLE
;
2215 case AUTO_BOOLEAN_FALSE
:
2216 return PACKET_DISABLE
;
2217 case AUTO_BOOLEAN_AUTO
:
2218 return config
->support
;
2220 gdb_assert_not_reached (_("bad switch"));
2224 /* Same as packet_config_support, but takes the packet's enum value as
2227 static enum packet_support
2228 packet_support (int packet
)
2230 struct packet_config
*config
= &remote_protocol_packets
[packet
];
2232 return packet_config_support (config
);
2236 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
2237 struct cmd_list_element
*c
,
2240 struct packet_config
*packet
;
2242 for (packet
= remote_protocol_packets
;
2243 packet
< &remote_protocol_packets
[PACKET_MAX
];
2246 if (&packet
->detect
== c
->var
)
2248 show_packet_config_cmd (packet
);
2252 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
2256 /* Should we try one of the 'Z' requests? */
2260 Z_PACKET_SOFTWARE_BP
,
2261 Z_PACKET_HARDWARE_BP
,
2268 /* For compatibility with older distributions. Provide a ``set remote
2269 Z-packet ...'' command that updates all the Z packet types. */
2271 static enum auto_boolean remote_Z_packet_detect
;
2274 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
2275 struct cmd_list_element
*c
)
2279 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2280 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
2284 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
2285 struct cmd_list_element
*c
,
2290 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2292 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
2296 /* Returns true if the multi-process extensions are in effect. */
2299 remote_multi_process_p (struct remote_state
*rs
)
2301 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
2304 /* Returns true if fork events are supported. */
2307 remote_fork_event_p (struct remote_state
*rs
)
2309 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
2312 /* Returns true if vfork events are supported. */
2315 remote_vfork_event_p (struct remote_state
*rs
)
2317 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
2320 /* Returns true if exec events are supported. */
2323 remote_exec_event_p (struct remote_state
*rs
)
2325 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
2328 /* Returns true if memory tagging is supported, false otherwise. */
2331 remote_memory_tagging_p ()
2333 return packet_support (PACKET_memory_tagging_feature
) == PACKET_ENABLE
;
2336 /* Insert fork catchpoint target routine. If fork events are enabled
2337 then return success, nothing more to do. */
2340 remote_target::insert_fork_catchpoint (int pid
)
2342 struct remote_state
*rs
= get_remote_state ();
2344 return !remote_fork_event_p (rs
);
2347 /* Remove fork catchpoint target routine. Nothing to do, just
2351 remote_target::remove_fork_catchpoint (int pid
)
2356 /* Insert vfork catchpoint target routine. If vfork events are enabled
2357 then return success, nothing more to do. */
2360 remote_target::insert_vfork_catchpoint (int pid
)
2362 struct remote_state
*rs
= get_remote_state ();
2364 return !remote_vfork_event_p (rs
);
2367 /* Remove vfork catchpoint target routine. Nothing to do, just
2371 remote_target::remove_vfork_catchpoint (int pid
)
2376 /* Insert exec catchpoint target routine. If exec events are
2377 enabled, just return success. */
2380 remote_target::insert_exec_catchpoint (int pid
)
2382 struct remote_state
*rs
= get_remote_state ();
2384 return !remote_exec_event_p (rs
);
2387 /* Remove exec catchpoint target routine. Nothing to do, just
2391 remote_target::remove_exec_catchpoint (int pid
)
2398 /* Take advantage of the fact that the TID field is not used, to tag
2399 special ptids with it set to != 0. */
2400 static const ptid_t
magic_null_ptid (42000, -1, 1);
2401 static const ptid_t
not_sent_ptid (42000, -2, 1);
2402 static const ptid_t
any_thread_ptid (42000, 0, 1);
2404 /* Find out if the stub attached to PID (and hence GDB should offer to
2405 detach instead of killing it when bailing out). */
2408 remote_target::remote_query_attached (int pid
)
2410 struct remote_state
*rs
= get_remote_state ();
2411 size_t size
= get_remote_packet_size ();
2413 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
2416 if (remote_multi_process_p (rs
))
2417 xsnprintf (rs
->buf
.data (), size
, "qAttached:%x", pid
);
2419 xsnprintf (rs
->buf
.data (), size
, "qAttached");
2422 getpkt (&rs
->buf
, 0);
2424 switch (packet_ok (rs
->buf
,
2425 &remote_protocol_packets
[PACKET_qAttached
]))
2428 if (strcmp (rs
->buf
.data (), "1") == 0)
2432 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
2434 case PACKET_UNKNOWN
:
2441 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2442 has been invented by GDB, instead of reported by the target. Since
2443 we can be connected to a remote system before before knowing about
2444 any inferior, mark the target with execution when we find the first
2445 inferior. If ATTACHED is 1, then we had just attached to this
2446 inferior. If it is 0, then we just created this inferior. If it
2447 is -1, then try querying the remote stub to find out if it had
2448 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2449 attempt to open this inferior's executable as the main executable
2450 if no main executable is open already. */
2453 remote_target::remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
2456 struct inferior
*inf
;
2458 /* Check whether this process we're learning about is to be
2459 considered attached, or if is to be considered to have been
2460 spawned by the stub. */
2462 attached
= remote_query_attached (pid
);
2464 if (gdbarch_has_global_solist (target_gdbarch ()))
2466 /* If the target shares code across all inferiors, then every
2467 attach adds a new inferior. */
2468 inf
= add_inferior (pid
);
2470 /* ... and every inferior is bound to the same program space.
2471 However, each inferior may still have its own address
2473 inf
->aspace
= maybe_new_address_space ();
2474 inf
->pspace
= current_program_space
;
2478 /* In the traditional debugging scenario, there's a 1-1 match
2479 between program/address spaces. We simply bind the inferior
2480 to the program space's address space. */
2481 inf
= current_inferior ();
2483 /* However, if the current inferior is already bound to a
2484 process, find some other empty inferior. */
2488 for (inferior
*it
: all_inferiors ())
2497 /* Since all inferiors were already bound to a process, add
2499 inf
= add_inferior_with_spaces ();
2501 switch_to_inferior_no_thread (inf
);
2502 inf
->push_target (this);
2503 inferior_appeared (inf
, pid
);
2506 inf
->attach_flag
= attached
;
2507 inf
->fake_pid_p
= fake_pid_p
;
2509 /* If no main executable is currently open then attempt to
2510 open the file that was executed to create this inferior. */
2511 if (try_open_exec
&& get_exec_file (0) == NULL
)
2512 exec_file_locate_attach (pid
, 0, 1);
2514 /* Check for exec file mismatch, and let the user solve it. */
2515 validate_exec_file (1);
2520 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
2521 static remote_thread_info
*get_remote_thread_info (remote_target
*target
,
2524 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2525 according to RUNNING. */
2528 remote_target::remote_add_thread (ptid_t ptid
, bool running
, bool executing
)
2530 struct remote_state
*rs
= get_remote_state ();
2531 struct thread_info
*thread
;
2533 /* GDB historically didn't pull threads in the initial connection
2534 setup. If the remote target doesn't even have a concept of
2535 threads (e.g., a bare-metal target), even if internally we
2536 consider that a single-threaded target, mentioning a new thread
2537 might be confusing to the user. Be silent then, preserving the
2538 age old behavior. */
2539 if (rs
->starting_up
)
2540 thread
= add_thread_silent (this, ptid
);
2542 thread
= add_thread (this, ptid
);
2544 /* We start by assuming threads are resumed. That state then gets updated
2545 when we process a matching stop reply. */
2546 get_remote_thread_info (thread
)->set_resumed ();
2548 set_executing (this, ptid
, executing
);
2549 set_running (this, ptid
, running
);
2554 /* Come here when we learn about a thread id from the remote target.
2555 It may be the first time we hear about such thread, so take the
2556 opportunity to add it to GDB's thread list. In case this is the
2557 first time we're noticing its corresponding inferior, add it to
2558 GDB's inferior list as well. EXECUTING indicates whether the
2559 thread is (internally) executing or stopped. */
2562 remote_target::remote_notice_new_inferior (ptid_t currthread
, bool executing
)
2564 /* In non-stop mode, we assume new found threads are (externally)
2565 running until proven otherwise with a stop reply. In all-stop,
2566 we can only get here if all threads are stopped. */
2567 bool running
= target_is_non_stop_p ();
2569 /* If this is a new thread, add it to GDB's thread list.
2570 If we leave it up to WFI to do this, bad things will happen. */
2572 thread_info
*tp
= find_thread_ptid (this, currthread
);
2573 if (tp
!= NULL
&& tp
->state
== THREAD_EXITED
)
2575 /* We're seeing an event on a thread id we knew had exited.
2576 This has to be a new thread reusing the old id. Add it. */
2577 remote_add_thread (currthread
, running
, executing
);
2581 if (!in_thread_list (this, currthread
))
2583 struct inferior
*inf
= NULL
;
2584 int pid
= currthread
.pid ();
2586 if (inferior_ptid
.is_pid ()
2587 && pid
== inferior_ptid
.pid ())
2589 /* inferior_ptid has no thread member yet. This can happen
2590 with the vAttach -> remote_wait,"TAAthread:" path if the
2591 stub doesn't support qC. This is the first stop reported
2592 after an attach, so this is the main thread. Update the
2593 ptid in the thread list. */
2594 if (in_thread_list (this, ptid_t (pid
)))
2595 thread_change_ptid (this, inferior_ptid
, currthread
);
2599 = remote_add_thread (currthread
, running
, executing
);
2600 switch_to_thread (thr
);
2605 if (magic_null_ptid
== inferior_ptid
)
2607 /* inferior_ptid is not set yet. This can happen with the
2608 vRun -> remote_wait,"TAAthread:" path if the stub
2609 doesn't support qC. This is the first stop reported
2610 after an attach, so this is the main thread. Update the
2611 ptid in the thread list. */
2612 thread_change_ptid (this, inferior_ptid
, currthread
);
2616 /* When connecting to a target remote, or to a target
2617 extended-remote which already was debugging an inferior, we
2618 may not know about it yet. Add it before adding its child
2619 thread, so notifications are emitted in a sensible order. */
2620 if (find_inferior_pid (this, currthread
.pid ()) == NULL
)
2622 struct remote_state
*rs
= get_remote_state ();
2623 bool fake_pid_p
= !remote_multi_process_p (rs
);
2625 inf
= remote_add_inferior (fake_pid_p
,
2626 currthread
.pid (), -1, 1);
2629 /* This is really a new thread. Add it. */
2630 thread_info
*new_thr
2631 = remote_add_thread (currthread
, running
, executing
);
2633 /* If we found a new inferior, let the common code do whatever
2634 it needs to with it (e.g., read shared libraries, insert
2635 breakpoints), unless we're just setting up an all-stop
2639 struct remote_state
*rs
= get_remote_state ();
2641 if (!rs
->starting_up
)
2642 notice_new_inferior (new_thr
, executing
, 0);
2647 /* Return THREAD's private thread data, creating it if necessary. */
2649 static remote_thread_info
*
2650 get_remote_thread_info (thread_info
*thread
)
2652 gdb_assert (thread
!= NULL
);
2654 if (thread
->priv
== NULL
)
2655 thread
->priv
.reset (new remote_thread_info
);
2657 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
2660 /* Return PTID's private thread data, creating it if necessary. */
2662 static remote_thread_info
*
2663 get_remote_thread_info (remote_target
*target
, ptid_t ptid
)
2665 thread_info
*thr
= find_thread_ptid (target
, ptid
);
2666 return get_remote_thread_info (thr
);
2669 /* Call this function as a result of
2670 1) A halt indication (T packet) containing a thread id
2671 2) A direct query of currthread
2672 3) Successful execution of set thread */
2675 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2677 rs
->general_thread
= currthread
;
2680 /* If 'QPassSignals' is supported, tell the remote stub what signals
2681 it can simply pass through to the inferior without reporting. */
2684 remote_target::pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2686 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2688 char *pass_packet
, *p
;
2690 struct remote_state
*rs
= get_remote_state ();
2692 gdb_assert (pass_signals
.size () < 256);
2693 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2695 if (pass_signals
[i
])
2698 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2699 strcpy (pass_packet
, "QPassSignals:");
2700 p
= pass_packet
+ strlen (pass_packet
);
2701 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2703 if (pass_signals
[i
])
2706 *p
++ = tohex (i
>> 4);
2707 *p
++ = tohex (i
& 15);
2716 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2718 putpkt (pass_packet
);
2719 getpkt (&rs
->buf
, 0);
2720 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2721 xfree (rs
->last_pass_packet
);
2722 rs
->last_pass_packet
= pass_packet
;
2725 xfree (pass_packet
);
2729 /* If 'QCatchSyscalls' is supported, tell the remote stub
2730 to report syscalls to GDB. */
2733 remote_target::set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
2734 gdb::array_view
<const int> syscall_counts
)
2736 const char *catch_packet
;
2737 enum packet_result result
;
2740 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2742 /* Not supported. */
2746 if (needed
&& any_count
== 0)
2748 /* Count how many syscalls are to be caught. */
2749 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2751 if (syscall_counts
[i
] != 0)
2756 remote_debug_printf ("pid %d needed %d any_count %d n_sysno %d",
2757 pid
, needed
, any_count
, n_sysno
);
2759 std::string built_packet
;
2762 /* Prepare a packet with the sysno list, assuming max 8+1
2763 characters for a sysno. If the resulting packet size is too
2764 big, fallback on the non-selective packet. */
2765 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2766 built_packet
.reserve (maxpktsz
);
2767 built_packet
= "QCatchSyscalls:1";
2770 /* Add in each syscall to be caught. */
2771 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2773 if (syscall_counts
[i
] != 0)
2774 string_appendf (built_packet
, ";%zx", i
);
2777 if (built_packet
.size () > get_remote_packet_size ())
2779 /* catch_packet too big. Fallback to less efficient
2780 non selective mode, with GDB doing the filtering. */
2781 catch_packet
= "QCatchSyscalls:1";
2784 catch_packet
= built_packet
.c_str ();
2787 catch_packet
= "QCatchSyscalls:0";
2789 struct remote_state
*rs
= get_remote_state ();
2791 putpkt (catch_packet
);
2792 getpkt (&rs
->buf
, 0);
2793 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2794 if (result
== PACKET_OK
)
2800 /* If 'QProgramSignals' is supported, tell the remote stub what
2801 signals it should pass through to the inferior when detaching. */
2804 remote_target::program_signals (gdb::array_view
<const unsigned char> signals
)
2806 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2810 struct remote_state
*rs
= get_remote_state ();
2812 gdb_assert (signals
.size () < 256);
2813 for (size_t i
= 0; i
< signals
.size (); i
++)
2818 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2819 strcpy (packet
, "QProgramSignals:");
2820 p
= packet
+ strlen (packet
);
2821 for (size_t i
= 0; i
< signals
.size (); i
++)
2823 if (signal_pass_state (i
))
2826 *p
++ = tohex (i
>> 4);
2827 *p
++ = tohex (i
& 15);
2836 if (!rs
->last_program_signals_packet
2837 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2840 getpkt (&rs
->buf
, 0);
2841 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2842 xfree (rs
->last_program_signals_packet
);
2843 rs
->last_program_signals_packet
= packet
;
2850 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2851 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2852 thread. If GEN is set, set the general thread, if not, then set
2853 the step/continue thread. */
2855 remote_target::set_thread (ptid_t ptid
, int gen
)
2857 struct remote_state
*rs
= get_remote_state ();
2858 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2859 char *buf
= rs
->buf
.data ();
2860 char *endbuf
= buf
+ get_remote_packet_size ();
2866 *buf
++ = gen
? 'g' : 'c';
2867 if (ptid
== magic_null_ptid
)
2868 xsnprintf (buf
, endbuf
- buf
, "0");
2869 else if (ptid
== any_thread_ptid
)
2870 xsnprintf (buf
, endbuf
- buf
, "0");
2871 else if (ptid
== minus_one_ptid
)
2872 xsnprintf (buf
, endbuf
- buf
, "-1");
2874 write_ptid (buf
, endbuf
, ptid
);
2876 getpkt (&rs
->buf
, 0);
2878 rs
->general_thread
= ptid
;
2880 rs
->continue_thread
= ptid
;
2884 remote_target::set_general_thread (ptid_t ptid
)
2886 set_thread (ptid
, 1);
2890 remote_target::set_continue_thread (ptid_t ptid
)
2892 set_thread (ptid
, 0);
2895 /* Change the remote current process. Which thread within the process
2896 ends up selected isn't important, as long as it is the same process
2897 as what INFERIOR_PTID points to.
2899 This comes from that fact that there is no explicit notion of
2900 "selected process" in the protocol. The selected process for
2901 general operations is the process the selected general thread
2905 remote_target::set_general_process ()
2907 struct remote_state
*rs
= get_remote_state ();
2909 /* If the remote can't handle multiple processes, don't bother. */
2910 if (!remote_multi_process_p (rs
))
2913 /* We only need to change the remote current thread if it's pointing
2914 at some other process. */
2915 if (rs
->general_thread
.pid () != inferior_ptid
.pid ())
2916 set_general_thread (inferior_ptid
);
2920 /* Return nonzero if this is the main thread that we made up ourselves
2921 to model non-threaded targets as single-threaded. */
2924 remote_thread_always_alive (ptid_t ptid
)
2926 if (ptid
== magic_null_ptid
)
2927 /* The main thread is always alive. */
2930 if (ptid
.pid () != 0 && ptid
.lwp () == 0)
2931 /* The main thread is always alive. This can happen after a
2932 vAttach, if the remote side doesn't support
2939 /* Return nonzero if the thread PTID is still alive on the remote
2943 remote_target::thread_alive (ptid_t ptid
)
2945 struct remote_state
*rs
= get_remote_state ();
2948 /* Check if this is a thread that we made up ourselves to model
2949 non-threaded targets as single-threaded. */
2950 if (remote_thread_always_alive (ptid
))
2953 p
= rs
->buf
.data ();
2954 endp
= p
+ get_remote_packet_size ();
2957 write_ptid (p
, endp
, ptid
);
2960 getpkt (&rs
->buf
, 0);
2961 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2964 /* Return a pointer to a thread name if we know it and NULL otherwise.
2965 The thread_info object owns the memory for the name. */
2968 remote_target::thread_name (struct thread_info
*info
)
2970 if (info
->priv
!= NULL
)
2972 const std::string
&name
= get_remote_thread_info (info
)->name
;
2973 return !name
.empty () ? name
.c_str () : NULL
;
2979 /* About these extended threadlist and threadinfo packets. They are
2980 variable length packets but, the fields within them are often fixed
2981 length. They are redundant enough to send over UDP as is the
2982 remote protocol in general. There is a matching unit test module
2985 /* WARNING: This threadref data structure comes from the remote O.S.,
2986 libstub protocol encoding, and remote.c. It is not particularly
2989 /* Right now, the internal structure is int. We want it to be bigger.
2990 Plan to fix this. */
2992 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2994 /* gdb_ext_thread_info is an internal GDB data structure which is
2995 equivalent to the reply of the remote threadinfo packet. */
2997 struct gdb_ext_thread_info
2999 threadref threadid
; /* External form of thread reference. */
3000 int active
; /* Has state interesting to GDB?
3002 char display
[256]; /* Brief state display, name,
3003 blocked/suspended. */
3004 char shortname
[32]; /* To be used to name threads. */
3005 char more_display
[256]; /* Long info, statistics, queue depth,
3009 /* The volume of remote transfers can be limited by submitting
3010 a mask containing bits specifying the desired information.
3011 Use a union of these values as the 'selection' parameter to
3012 get_thread_info. FIXME: Make these TAG names more thread specific. */
3014 #define TAG_THREADID 1
3015 #define TAG_EXISTS 2
3016 #define TAG_DISPLAY 4
3017 #define TAG_THREADNAME 8
3018 #define TAG_MOREDISPLAY 16
3020 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
3022 static const char *unpack_nibble (const char *buf
, int *val
);
3024 static const char *unpack_byte (const char *buf
, int *value
);
3026 static char *pack_int (char *buf
, int value
);
3028 static const char *unpack_int (const char *buf
, int *value
);
3030 static const char *unpack_string (const char *src
, char *dest
, int length
);
3032 static char *pack_threadid (char *pkt
, threadref
*id
);
3034 static const char *unpack_threadid (const char *inbuf
, threadref
*id
);
3036 void int_to_threadref (threadref
*id
, int value
);
3038 static int threadref_to_int (threadref
*ref
);
3040 static void copy_threadref (threadref
*dest
, threadref
*src
);
3042 static int threadmatch (threadref
*dest
, threadref
*src
);
3044 static char *pack_threadinfo_request (char *pkt
, int mode
,
3047 static char *pack_threadlist_request (char *pkt
, int startflag
,
3049 threadref
*nextthread
);
3051 static int remote_newthread_step (threadref
*ref
, void *context
);
3054 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
3055 buffer we're allowed to write to. Returns
3056 BUF+CHARACTERS_WRITTEN. */
3059 remote_target::write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
3062 struct remote_state
*rs
= get_remote_state ();
3064 if (remote_multi_process_p (rs
))
3068 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
3070 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
3074 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
3076 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
3081 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
3082 last parsed char. Returns null_ptid if no thread id is found, and
3083 throws an error if the thread id has an invalid format. */
3086 read_ptid (const char *buf
, const char **obuf
)
3088 const char *p
= buf
;
3090 ULONGEST pid
= 0, tid
= 0;
3094 /* Multi-process ptid. */
3095 pp
= unpack_varlen_hex (p
+ 1, &pid
);
3097 error (_("invalid remote ptid: %s"), p
);
3100 pp
= unpack_varlen_hex (p
+ 1, &tid
);
3103 return ptid_t (pid
, tid
, 0);
3106 /* No multi-process. Just a tid. */
3107 pp
= unpack_varlen_hex (p
, &tid
);
3109 /* Return null_ptid when no thread id is found. */
3117 /* Since the stub is not sending a process id, then default to
3118 what's in inferior_ptid, unless it's null at this point. If so,
3119 then since there's no way to know the pid of the reported
3120 threads, use the magic number. */
3121 if (inferior_ptid
== null_ptid
)
3122 pid
= magic_null_ptid
.pid ();
3124 pid
= inferior_ptid
.pid ();
3128 return ptid_t (pid
, tid
, 0);
3134 if (ch
>= 'a' && ch
<= 'f')
3135 return ch
- 'a' + 10;
3136 if (ch
>= '0' && ch
<= '9')
3138 if (ch
>= 'A' && ch
<= 'F')
3139 return ch
- 'A' + 10;
3144 stub_unpack_int (const char *buff
, int fieldlength
)
3151 nibble
= stubhex (*buff
++);
3155 retval
= retval
<< 4;
3161 unpack_nibble (const char *buf
, int *val
)
3163 *val
= fromhex (*buf
++);
3168 unpack_byte (const char *buf
, int *value
)
3170 *value
= stub_unpack_int (buf
, 2);
3175 pack_int (char *buf
, int value
)
3177 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
3178 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
3179 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
3180 buf
= pack_hex_byte (buf
, (value
& 0xff));
3185 unpack_int (const char *buf
, int *value
)
3187 *value
= stub_unpack_int (buf
, 8);
3191 #if 0 /* Currently unused, uncomment when needed. */
3192 static char *pack_string (char *pkt
, char *string
);
3195 pack_string (char *pkt
, char *string
)
3200 len
= strlen (string
);
3202 len
= 200; /* Bigger than most GDB packets, junk??? */
3203 pkt
= pack_hex_byte (pkt
, len
);
3207 if ((ch
== '\0') || (ch
== '#'))
3208 ch
= '*'; /* Protect encapsulation. */
3213 #endif /* 0 (unused) */
3216 unpack_string (const char *src
, char *dest
, int length
)
3225 pack_threadid (char *pkt
, threadref
*id
)
3228 unsigned char *altid
;
3230 altid
= (unsigned char *) id
;
3231 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
3233 pkt
= pack_hex_byte (pkt
, *altid
++);
3239 unpack_threadid (const char *inbuf
, threadref
*id
)
3242 const char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
3245 altref
= (char *) id
;
3247 while (inbuf
< limit
)
3249 x
= stubhex (*inbuf
++);
3250 y
= stubhex (*inbuf
++);
3251 *altref
++ = (x
<< 4) | y
;
3256 /* Externally, threadrefs are 64 bits but internally, they are still
3257 ints. This is due to a mismatch of specifications. We would like
3258 to use 64bit thread references internally. This is an adapter
3262 int_to_threadref (threadref
*id
, int value
)
3264 unsigned char *scan
;
3266 scan
= (unsigned char *) id
;
3272 *scan
++ = (value
>> 24) & 0xff;
3273 *scan
++ = (value
>> 16) & 0xff;
3274 *scan
++ = (value
>> 8) & 0xff;
3275 *scan
++ = (value
& 0xff);
3279 threadref_to_int (threadref
*ref
)
3282 unsigned char *scan
;
3288 value
= (value
<< 8) | ((*scan
++) & 0xff);
3293 copy_threadref (threadref
*dest
, threadref
*src
)
3296 unsigned char *csrc
, *cdest
;
3298 csrc
= (unsigned char *) src
;
3299 cdest
= (unsigned char *) dest
;
3306 threadmatch (threadref
*dest
, threadref
*src
)
3308 /* Things are broken right now, so just assume we got a match. */
3310 unsigned char *srcp
, *destp
;
3312 srcp
= (char *) src
;
3313 destp
= (char *) dest
;
3317 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
3324 threadid:1, # always request threadid
3331 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3334 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
3336 *pkt
++ = 'q'; /* Info Query */
3337 *pkt
++ = 'P'; /* process or thread info */
3338 pkt
= pack_int (pkt
, mode
); /* mode */
3339 pkt
= pack_threadid (pkt
, id
); /* threadid */
3340 *pkt
= '\0'; /* terminate */
3344 /* These values tag the fields in a thread info response packet. */
3345 /* Tagging the fields allows us to request specific fields and to
3346 add more fields as time goes by. */
3348 #define TAG_THREADID 1 /* Echo the thread identifier. */
3349 #define TAG_EXISTS 2 /* Is this process defined enough to
3350 fetch registers and its stack? */
3351 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3352 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3353 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3357 remote_target::remote_unpack_thread_info_response (const char *pkt
,
3358 threadref
*expectedref
,
3359 gdb_ext_thread_info
*info
)
3361 struct remote_state
*rs
= get_remote_state ();
3365 const char *limit
= pkt
+ rs
->buf
.size (); /* Plausible parsing limit. */
3368 /* info->threadid = 0; FIXME: implement zero_threadref. */
3370 info
->display
[0] = '\0';
3371 info
->shortname
[0] = '\0';
3372 info
->more_display
[0] = '\0';
3374 /* Assume the characters indicating the packet type have been
3376 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
3377 pkt
= unpack_threadid (pkt
, &ref
);
3380 warning (_("Incomplete response to threadinfo request."));
3381 if (!threadmatch (&ref
, expectedref
))
3382 { /* This is an answer to a different request. */
3383 warning (_("ERROR RMT Thread info mismatch."));
3386 copy_threadref (&info
->threadid
, &ref
);
3388 /* Loop on tagged fields , try to bail if something goes wrong. */
3390 /* Packets are terminated with nulls. */
3391 while ((pkt
< limit
) && mask
&& *pkt
)
3393 pkt
= unpack_int (pkt
, &tag
); /* tag */
3394 pkt
= unpack_byte (pkt
, &length
); /* length */
3395 if (!(tag
& mask
)) /* Tags out of synch with mask. */
3397 warning (_("ERROR RMT: threadinfo tag mismatch."));
3401 if (tag
== TAG_THREADID
)
3405 warning (_("ERROR RMT: length of threadid is not 16."));
3409 pkt
= unpack_threadid (pkt
, &ref
);
3410 mask
= mask
& ~TAG_THREADID
;
3413 if (tag
== TAG_EXISTS
)
3415 info
->active
= stub_unpack_int (pkt
, length
);
3417 mask
= mask
& ~(TAG_EXISTS
);
3420 warning (_("ERROR RMT: 'exists' length too long."));
3426 if (tag
== TAG_THREADNAME
)
3428 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
3429 mask
= mask
& ~TAG_THREADNAME
;
3432 if (tag
== TAG_DISPLAY
)
3434 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
3435 mask
= mask
& ~TAG_DISPLAY
;
3438 if (tag
== TAG_MOREDISPLAY
)
3440 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
3441 mask
= mask
& ~TAG_MOREDISPLAY
;
3444 warning (_("ERROR RMT: unknown thread info tag."));
3445 break; /* Not a tag we know about. */
3451 remote_target::remote_get_threadinfo (threadref
*threadid
,
3453 gdb_ext_thread_info
*info
)
3455 struct remote_state
*rs
= get_remote_state ();
3458 pack_threadinfo_request (rs
->buf
.data (), fieldset
, threadid
);
3460 getpkt (&rs
->buf
, 0);
3462 if (rs
->buf
[0] == '\0')
3465 result
= remote_unpack_thread_info_response (&rs
->buf
[2],
3470 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3473 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
3474 threadref
*nextthread
)
3476 *pkt
++ = 'q'; /* info query packet */
3477 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
3478 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
3479 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
3480 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
3485 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3488 remote_target::parse_threadlist_response (const char *pkt
, int result_limit
,
3489 threadref
*original_echo
,
3490 threadref
*resultlist
,
3493 struct remote_state
*rs
= get_remote_state ();
3494 int count
, resultcount
, done
;
3497 /* Assume the 'q' and 'M chars have been stripped. */
3498 const char *limit
= pkt
+ (rs
->buf
.size () - BUF_THREAD_ID_SIZE
);
3499 /* done parse past here */
3500 pkt
= unpack_byte (pkt
, &count
); /* count field */
3501 pkt
= unpack_nibble (pkt
, &done
);
3502 /* The first threadid is the argument threadid. */
3503 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
3504 while ((count
-- > 0) && (pkt
< limit
))
3506 pkt
= unpack_threadid (pkt
, resultlist
++);
3507 if (resultcount
++ >= result_limit
)
3515 /* Fetch the next batch of threads from the remote. Returns -1 if the
3516 qL packet is not supported, 0 on error and 1 on success. */
3519 remote_target::remote_get_threadlist (int startflag
, threadref
*nextthread
,
3520 int result_limit
, int *done
, int *result_count
,
3521 threadref
*threadlist
)
3523 struct remote_state
*rs
= get_remote_state ();
3526 /* Truncate result limit to be smaller than the packet size. */
3527 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
3528 >= get_remote_packet_size ())
3529 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
3531 pack_threadlist_request (rs
->buf
.data (), startflag
, result_limit
,
3534 getpkt (&rs
->buf
, 0);
3535 if (rs
->buf
[0] == '\0')
3537 /* Packet not supported. */
3542 parse_threadlist_response (&rs
->buf
[2], result_limit
,
3543 &rs
->echo_nextthread
, threadlist
, done
);
3545 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
3547 /* FIXME: This is a good reason to drop the packet. */
3548 /* Possibly, there is a duplicate response. */
3550 retransmit immediatly - race conditions
3551 retransmit after timeout - yes
3553 wait for packet, then exit
3555 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3556 return 0; /* I choose simply exiting. */
3558 if (*result_count
<= 0)
3562 warning (_("RMT ERROR : failed to get remote thread list."));
3565 return result
; /* break; */
3567 if (*result_count
> result_limit
)
3570 warning (_("RMT ERROR: threadlist response longer than requested."));
3576 /* Fetch the list of remote threads, with the qL packet, and call
3577 STEPFUNCTION for each thread found. Stops iterating and returns 1
3578 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3579 STEPFUNCTION returns false. If the packet is not supported,
3583 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction
,
3584 void *context
, int looplimit
)
3586 struct remote_state
*rs
= get_remote_state ();
3587 int done
, i
, result_count
;
3595 if (loopcount
++ > looplimit
)
3598 warning (_("Remote fetch threadlist -infinite loop-."));
3601 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
3602 MAXTHREADLISTRESULTS
,
3603 &done
, &result_count
,
3604 rs
->resultthreadlist
);
3607 /* Clear for later iterations. */
3609 /* Setup to resume next batch of thread references, set nextthread. */
3610 if (result_count
>= 1)
3611 copy_threadref (&rs
->nextthread
,
3612 &rs
->resultthreadlist
[result_count
- 1]);
3614 while (result_count
--)
3616 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
3626 /* A thread found on the remote target. */
3630 explicit thread_item (ptid_t ptid_
)
3634 thread_item (thread_item
&&other
) = default;
3635 thread_item
&operator= (thread_item
&&other
) = default;
3637 DISABLE_COPY_AND_ASSIGN (thread_item
);
3639 /* The thread's PTID. */
3642 /* The thread's extra info. */
3645 /* The thread's name. */
3648 /* The core the thread was running on. -1 if not known. */
3651 /* The thread handle associated with the thread. */
3652 gdb::byte_vector thread_handle
;
3655 /* Context passed around to the various methods listing remote
3656 threads. As new threads are found, they're added to the ITEMS
3659 struct threads_listing_context
3661 /* Return true if this object contains an entry for a thread with ptid
3664 bool contains_thread (ptid_t ptid
) const
3666 auto match_ptid
= [&] (const thread_item
&item
)
3668 return item
.ptid
== ptid
;
3671 auto it
= std::find_if (this->items
.begin (),
3675 return it
!= this->items
.end ();
3678 /* Remove the thread with ptid PTID. */
3680 void remove_thread (ptid_t ptid
)
3682 auto match_ptid
= [&] (const thread_item
&item
)
3684 return item
.ptid
== ptid
;
3687 auto it
= std::remove_if (this->items
.begin (),
3691 if (it
!= this->items
.end ())
3692 this->items
.erase (it
);
3695 /* The threads found on the remote target. */
3696 std::vector
<thread_item
> items
;
3700 remote_newthread_step (threadref
*ref
, void *data
)
3702 struct threads_listing_context
*context
3703 = (struct threads_listing_context
*) data
;
3704 int pid
= inferior_ptid
.pid ();
3705 int lwp
= threadref_to_int (ref
);
3706 ptid_t
ptid (pid
, lwp
);
3708 context
->items
.emplace_back (ptid
);
3710 return 1; /* continue iterator */
3713 #define CRAZY_MAX_THREADS 1000
3716 remote_target::remote_current_thread (ptid_t oldpid
)
3718 struct remote_state
*rs
= get_remote_state ();
3721 getpkt (&rs
->buf
, 0);
3722 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3727 result
= read_ptid (&rs
->buf
[2], &obuf
);
3729 remote_debug_printf ("warning: garbage in qC reply");
3737 /* List remote threads using the deprecated qL packet. */
3740 remote_target::remote_get_threads_with_ql (threads_listing_context
*context
)
3742 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3743 CRAZY_MAX_THREADS
) >= 0)
3749 #if defined(HAVE_LIBEXPAT)
3752 start_thread (struct gdb_xml_parser
*parser
,
3753 const struct gdb_xml_element
*element
,
3755 std::vector
<gdb_xml_value
> &attributes
)
3757 struct threads_listing_context
*data
3758 = (struct threads_listing_context
*) user_data
;
3759 struct gdb_xml_value
*attr
;
3761 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3762 ptid_t ptid
= read_ptid (id
, NULL
);
3764 data
->items
.emplace_back (ptid
);
3765 thread_item
&item
= data
->items
.back ();
3767 attr
= xml_find_attribute (attributes
, "core");
3769 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3771 attr
= xml_find_attribute (attributes
, "name");
3773 item
.name
= (const char *) attr
->value
.get ();
3775 attr
= xml_find_attribute (attributes
, "handle");
3777 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3781 end_thread (struct gdb_xml_parser
*parser
,
3782 const struct gdb_xml_element
*element
,
3783 void *user_data
, const char *body_text
)
3785 struct threads_listing_context
*data
3786 = (struct threads_listing_context
*) user_data
;
3788 if (body_text
!= NULL
&& *body_text
!= '\0')
3789 data
->items
.back ().extra
= body_text
;
3792 const struct gdb_xml_attribute thread_attributes
[] = {
3793 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3794 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3795 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3796 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3797 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3800 const struct gdb_xml_element thread_children
[] = {
3801 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3804 const struct gdb_xml_element threads_children
[] = {
3805 { "thread", thread_attributes
, thread_children
,
3806 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3807 start_thread
, end_thread
},
3808 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3811 const struct gdb_xml_element threads_elements
[] = {
3812 { "threads", NULL
, threads_children
,
3813 GDB_XML_EF_NONE
, NULL
, NULL
},
3814 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3819 /* List remote threads using qXfer:threads:read. */
3822 remote_target::remote_get_threads_with_qxfer (threads_listing_context
*context
)
3824 #if defined(HAVE_LIBEXPAT)
3825 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3827 gdb::optional
<gdb::char_vector
> xml
3828 = target_read_stralloc (this, TARGET_OBJECT_THREADS
, NULL
);
3830 if (xml
&& (*xml
)[0] != '\0')
3832 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3833 threads_elements
, xml
->data (), context
);
3843 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3846 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context
*context
)
3848 struct remote_state
*rs
= get_remote_state ();
3850 if (rs
->use_threadinfo_query
)
3854 putpkt ("qfThreadInfo");
3855 getpkt (&rs
->buf
, 0);
3856 bufp
= rs
->buf
.data ();
3857 if (bufp
[0] != '\0') /* q packet recognized */
3859 while (*bufp
++ == 'm') /* reply contains one or more TID */
3863 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3864 context
->items
.emplace_back (ptid
);
3866 while (*bufp
++ == ','); /* comma-separated list */
3867 putpkt ("qsThreadInfo");
3868 getpkt (&rs
->buf
, 0);
3869 bufp
= rs
->buf
.data ();
3875 /* Packet not recognized. */
3876 rs
->use_threadinfo_query
= 0;
3883 /* Return true if INF only has one non-exited thread. */
3886 has_single_non_exited_thread (inferior
*inf
)
3889 for (thread_info
*tp ATTRIBUTE_UNUSED
: inf
->non_exited_threads ())
3895 /* Implement the to_update_thread_list function for the remote
3899 remote_target::update_thread_list ()
3901 struct threads_listing_context context
;
3904 /* We have a few different mechanisms to fetch the thread list. Try
3905 them all, starting with the most preferred one first, falling
3906 back to older methods. */
3907 if (remote_get_threads_with_qxfer (&context
)
3908 || remote_get_threads_with_qthreadinfo (&context
)
3909 || remote_get_threads_with_ql (&context
))
3913 if (context
.items
.empty ()
3914 && remote_thread_always_alive (inferior_ptid
))
3916 /* Some targets don't really support threads, but still
3917 reply an (empty) thread list in response to the thread
3918 listing packets, instead of replying "packet not
3919 supported". Exit early so we don't delete the main
3924 /* CONTEXT now holds the current thread list on the remote
3925 target end. Delete GDB-side threads no longer found on the
3927 for (thread_info
*tp
: all_threads_safe ())
3929 if (tp
->inf
->process_target () != this)
3932 if (!context
.contains_thread (tp
->ptid
))
3934 /* Do not remove the thread if it is the last thread in
3935 the inferior. This situation happens when we have a
3936 pending exit process status to process. Otherwise we
3937 may end up with a seemingly live inferior (i.e. pid
3938 != 0) that has no threads. */
3939 if (has_single_non_exited_thread (tp
->inf
))
3947 /* Remove any unreported fork child threads from CONTEXT so
3948 that we don't interfere with follow fork, which is where
3949 creation of such threads is handled. */
3950 remove_new_fork_children (&context
);
3952 /* And now add threads we don't know about yet to our list. */
3953 for (thread_item
&item
: context
.items
)
3955 if (item
.ptid
!= null_ptid
)
3957 /* In non-stop mode, we assume new found threads are
3958 executing until proven otherwise with a stop reply.
3959 In all-stop, we can only get here if all threads are
3961 bool executing
= target_is_non_stop_p ();
3963 remote_notice_new_inferior (item
.ptid
, executing
);
3965 thread_info
*tp
= find_thread_ptid (this, item
.ptid
);
3966 remote_thread_info
*info
= get_remote_thread_info (tp
);
3967 info
->core
= item
.core
;
3968 info
->extra
= std::move (item
.extra
);
3969 info
->name
= std::move (item
.name
);
3970 info
->thread_handle
= std::move (item
.thread_handle
);
3977 /* If no thread listing method is supported, then query whether
3978 each known thread is alive, one by one, with the T packet.
3979 If the target doesn't support threads at all, then this is a
3980 no-op. See remote_thread_alive. */
3986 * Collect a descriptive string about the given thread.
3987 * The target may say anything it wants to about the thread
3988 * (typically info about its blocked / runnable state, name, etc.).
3989 * This string will appear in the info threads display.
3991 * Optional: targets are not required to implement this function.
3995 remote_target::extra_thread_info (thread_info
*tp
)
3997 struct remote_state
*rs
= get_remote_state ();
4000 struct gdb_ext_thread_info threadinfo
;
4002 if (rs
->remote_desc
== 0) /* paranoia */
4003 internal_error (__FILE__
, __LINE__
,
4004 _("remote_threads_extra_info"));
4006 if (tp
->ptid
== magic_null_ptid
4007 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
4008 /* This is the main thread which was added by GDB. The remote
4009 server doesn't know about it. */
4012 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
4014 /* If already have cached info, use it. */
4015 if (!extra
.empty ())
4016 return extra
.c_str ();
4018 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
4020 /* If we're using qXfer:threads:read, then the extra info is
4021 included in the XML. So if we didn't have anything cached,
4022 it's because there's really no extra info. */
4026 if (rs
->use_threadextra_query
)
4028 char *b
= rs
->buf
.data ();
4029 char *endb
= b
+ get_remote_packet_size ();
4031 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
4033 write_ptid (b
, endb
, tp
->ptid
);
4036 getpkt (&rs
->buf
, 0);
4037 if (rs
->buf
[0] != 0)
4039 extra
.resize (strlen (rs
->buf
.data ()) / 2);
4040 hex2bin (rs
->buf
.data (), (gdb_byte
*) &extra
[0], extra
.size ());
4041 return extra
.c_str ();
4045 /* If the above query fails, fall back to the old method. */
4046 rs
->use_threadextra_query
= 0;
4047 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
4048 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
4049 int_to_threadref (&id
, tp
->ptid
.lwp ());
4050 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
4051 if (threadinfo
.active
)
4053 if (*threadinfo
.shortname
)
4054 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
4055 if (*threadinfo
.display
)
4057 if (!extra
.empty ())
4059 string_appendf (extra
, " State: %s", threadinfo
.display
);
4061 if (*threadinfo
.more_display
)
4063 if (!extra
.empty ())
4065 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
4067 return extra
.c_str ();
4074 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
4075 struct static_tracepoint_marker
*marker
)
4077 struct remote_state
*rs
= get_remote_state ();
4078 char *p
= rs
->buf
.data ();
4080 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
4082 p
+= hexnumstr (p
, addr
);
4084 getpkt (&rs
->buf
, 0);
4085 p
= rs
->buf
.data ();
4088 error (_("Remote failure reply: %s"), p
);
4092 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
4099 std::vector
<static_tracepoint_marker
>
4100 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
4102 struct remote_state
*rs
= get_remote_state ();
4103 std::vector
<static_tracepoint_marker
> markers
;
4105 static_tracepoint_marker marker
;
4107 /* Ask for a first packet of static tracepoint marker
4110 getpkt (&rs
->buf
, 0);
4111 p
= rs
->buf
.data ();
4113 error (_("Remote failure reply: %s"), p
);
4119 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
4121 if (strid
== NULL
|| marker
.str_id
== strid
)
4122 markers
.push_back (std::move (marker
));
4124 while (*p
++ == ','); /* comma-separated list */
4125 /* Ask for another packet of static tracepoint definition. */
4127 getpkt (&rs
->buf
, 0);
4128 p
= rs
->buf
.data ();
4135 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4138 remote_target::get_ada_task_ptid (long lwp
, long thread
)
4140 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
4144 /* Restart the remote side; this is an extended protocol operation. */
4147 remote_target::extended_remote_restart ()
4149 struct remote_state
*rs
= get_remote_state ();
4151 /* Send the restart command; for reasons I don't understand the
4152 remote side really expects a number after the "R". */
4153 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "R%x", 0);
4156 remote_fileio_reset ();
4159 /* Clean up connection to a remote debugger. */
4162 remote_target::close ()
4164 /* Make sure we leave stdin registered in the event loop. */
4167 trace_reset_local_state ();
4172 remote_target::~remote_target ()
4174 struct remote_state
*rs
= get_remote_state ();
4176 /* Check for NULL because we may get here with a partially
4177 constructed target/connection. */
4178 if (rs
->remote_desc
== nullptr)
4181 serial_close (rs
->remote_desc
);
4183 /* We are destroying the remote target, so we should discard
4184 everything of this target. */
4185 discard_pending_stop_replies_in_queue ();
4187 if (rs
->remote_async_inferior_event_token
)
4188 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4190 delete rs
->notif_state
;
4193 /* Query the remote side for the text, data and bss offsets. */
4196 remote_target::get_offsets ()
4198 struct remote_state
*rs
= get_remote_state ();
4201 int lose
, num_segments
= 0, do_sections
, do_segments
;
4202 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4204 if (current_program_space
->symfile_object_file
== NULL
)
4207 putpkt ("qOffsets");
4208 getpkt (&rs
->buf
, 0);
4209 buf
= rs
->buf
.data ();
4211 if (buf
[0] == '\000')
4212 return; /* Return silently. Stub doesn't support
4216 warning (_("Remote failure reply: %s"), buf
);
4220 /* Pick up each field in turn. This used to be done with scanf, but
4221 scanf will make trouble if CORE_ADDR size doesn't match
4222 conversion directives correctly. The following code will work
4223 with any size of CORE_ADDR. */
4224 text_addr
= data_addr
= bss_addr
= 0;
4228 if (startswith (ptr
, "Text="))
4231 /* Don't use strtol, could lose on big values. */
4232 while (*ptr
&& *ptr
!= ';')
4233 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4235 if (startswith (ptr
, ";Data="))
4238 while (*ptr
&& *ptr
!= ';')
4239 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4244 if (!lose
&& startswith (ptr
, ";Bss="))
4247 while (*ptr
&& *ptr
!= ';')
4248 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4250 if (bss_addr
!= data_addr
)
4251 warning (_("Target reported unsupported offsets: %s"), buf
);
4256 else if (startswith (ptr
, "TextSeg="))
4259 /* Don't use strtol, could lose on big values. */
4260 while (*ptr
&& *ptr
!= ';')
4261 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4264 if (startswith (ptr
, ";DataSeg="))
4267 while (*ptr
&& *ptr
!= ';')
4268 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4276 error (_("Malformed response to offset query, %s"), buf
);
4277 else if (*ptr
!= '\0')
4278 warning (_("Target reported unsupported offsets: %s"), buf
);
4280 objfile
*objf
= current_program_space
->symfile_object_file
;
4281 section_offsets offs
= objf
->section_offsets
;
4283 symfile_segment_data_up data
= get_symfile_segment_data (objf
->obfd
);
4284 do_segments
= (data
!= NULL
);
4285 do_sections
= num_segments
== 0;
4287 if (num_segments
> 0)
4289 segments
[0] = text_addr
;
4290 segments
[1] = data_addr
;
4292 /* If we have two segments, we can still try to relocate everything
4293 by assuming that the .text and .data offsets apply to the whole
4294 text and data segments. Convert the offsets given in the packet
4295 to base addresses for symfile_map_offsets_to_segments. */
4296 else if (data
!= nullptr && data
->segments
.size () == 2)
4298 segments
[0] = data
->segments
[0].base
+ text_addr
;
4299 segments
[1] = data
->segments
[1].base
+ data_addr
;
4302 /* If the object file has only one segment, assume that it is text
4303 rather than data; main programs with no writable data are rare,
4304 but programs with no code are useless. Of course the code might
4305 have ended up in the data segment... to detect that we would need
4306 the permissions here. */
4307 else if (data
&& data
->segments
.size () == 1)
4309 segments
[0] = data
->segments
[0].base
+ text_addr
;
4312 /* There's no way to relocate by segment. */
4318 int ret
= symfile_map_offsets_to_segments (objf
->obfd
,
4320 num_segments
, segments
);
4322 if (ret
== 0 && !do_sections
)
4323 error (_("Can not handle qOffsets TextSeg "
4324 "response with this symbol file"));
4332 offs
[SECT_OFF_TEXT (objf
)] = text_addr
;
4334 /* This is a temporary kludge to force data and bss to use the
4335 same offsets because that's what nlmconv does now. The real
4336 solution requires changes to the stub and remote.c that I
4337 don't have time to do right now. */
4339 offs
[SECT_OFF_DATA (objf
)] = data_addr
;
4340 offs
[SECT_OFF_BSS (objf
)] = data_addr
;
4343 objfile_relocate (objf
, offs
);
4346 /* Send interrupt_sequence to remote target. */
4349 remote_target::send_interrupt_sequence ()
4351 struct remote_state
*rs
= get_remote_state ();
4353 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4354 remote_serial_write ("\x03", 1);
4355 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4356 serial_send_break (rs
->remote_desc
);
4357 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4359 serial_send_break (rs
->remote_desc
);
4360 remote_serial_write ("g", 1);
4363 internal_error (__FILE__
, __LINE__
,
4364 _("Invalid value for interrupt_sequence_mode: %s."),
4365 interrupt_sequence_mode
);
4369 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4370 and extract the PTID. Returns NULL_PTID if not found. */
4373 stop_reply_extract_thread (const char *stop_reply
)
4375 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4379 /* Txx r:val ; r:val (...) */
4382 /* Look for "register" named "thread". */
4387 p1
= strchr (p
, ':');
4391 if (strncmp (p
, "thread", p1
- p
) == 0)
4392 return read_ptid (++p1
, &p
);
4394 p1
= strchr (p
, ';');
4406 /* Determine the remote side's current thread. If we have a stop
4407 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4408 "thread" register we can extract the current thread from. If not,
4409 ask the remote which is the current thread with qC. The former
4410 method avoids a roundtrip. */
4413 remote_target::get_current_thread (const char *wait_status
)
4415 ptid_t ptid
= null_ptid
;
4417 /* Note we don't use remote_parse_stop_reply as that makes use of
4418 the target architecture, which we haven't yet fully determined at
4420 if (wait_status
!= NULL
)
4421 ptid
= stop_reply_extract_thread (wait_status
);
4422 if (ptid
== null_ptid
)
4423 ptid
= remote_current_thread (inferior_ptid
);
4428 /* Query the remote target for which is the current thread/process,
4429 add it to our tables, and update INFERIOR_PTID. The caller is
4430 responsible for setting the state such that the remote end is ready
4431 to return the current thread.
4433 This function is called after handling the '?' or 'vRun' packets,
4434 whose response is a stop reply from which we can also try
4435 extracting the thread. If the target doesn't support the explicit
4436 qC query, we infer the current thread from that stop reply, passed
4437 in in WAIT_STATUS, which may be NULL.
4439 The function returns pointer to the main thread of the inferior. */
4442 remote_target::add_current_inferior_and_thread (const char *wait_status
)
4444 struct remote_state
*rs
= get_remote_state ();
4445 bool fake_pid_p
= false;
4447 switch_to_no_thread ();
4449 /* Now, if we have thread information, update the current thread's
4451 ptid_t curr_ptid
= get_current_thread (wait_status
);
4453 if (curr_ptid
!= null_ptid
)
4455 if (!remote_multi_process_p (rs
))
4460 /* Without this, some commands which require an active target
4461 (such as kill) won't work. This variable serves (at least)
4462 double duty as both the pid of the target process (if it has
4463 such), and as a flag indicating that a target is active. */
4464 curr_ptid
= magic_null_ptid
;
4468 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4470 /* Add the main thread and switch to it. Don't try reading
4471 registers yet, since we haven't fetched the target description
4473 thread_info
*tp
= add_thread_silent (this, curr_ptid
);
4474 switch_to_thread_no_regs (tp
);
4479 /* Print info about a thread that was found already stopped on
4483 print_one_stopped_thread (struct thread_info
*thread
)
4485 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
4487 switch_to_thread (thread
);
4488 thread
->suspend
.stop_pc
= get_frame_pc (get_current_frame ());
4489 set_current_sal_from_frame (get_current_frame ());
4491 thread
->suspend
.waitstatus_pending_p
= 0;
4493 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
4495 enum gdb_signal sig
= ws
->value
.sig
;
4497 if (signal_print_state (sig
))
4498 gdb::observers::signal_received
.notify (sig
);
4500 gdb::observers::normal_stop
.notify (NULL
, 1);
4503 /* Process all initial stop replies the remote side sent in response
4504 to the ? packet. These indicate threads that were already stopped
4505 on initial connection. We mark these threads as stopped and print
4506 their current frame before giving the user the prompt. */
4509 remote_target::process_initial_stop_replies (int from_tty
)
4511 int pending_stop_replies
= stop_reply_queue_length ();
4512 struct thread_info
*selected
= NULL
;
4513 struct thread_info
*lowest_stopped
= NULL
;
4514 struct thread_info
*first
= NULL
;
4516 /* Consume the initial pending events. */
4517 while (pending_stop_replies
-- > 0)
4519 ptid_t waiton_ptid
= minus_one_ptid
;
4521 struct target_waitstatus ws
;
4522 int ignore_event
= 0;
4524 memset (&ws
, 0, sizeof (ws
));
4525 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4527 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4531 case TARGET_WAITKIND_IGNORE
:
4532 case TARGET_WAITKIND_NO_RESUMED
:
4533 case TARGET_WAITKIND_SIGNALLED
:
4534 case TARGET_WAITKIND_EXITED
:
4535 /* We shouldn't see these, but if we do, just ignore. */
4536 remote_debug_printf ("event ignored");
4540 case TARGET_WAITKIND_EXECD
:
4541 xfree (ws
.value
.execd_pathname
);
4550 thread_info
*evthread
= find_thread_ptid (this, event_ptid
);
4552 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4554 enum gdb_signal sig
= ws
.value
.sig
;
4556 /* Stubs traditionally report SIGTRAP as initial signal,
4557 instead of signal 0. Suppress it. */
4558 if (sig
== GDB_SIGNAL_TRAP
)
4560 evthread
->suspend
.stop_signal
= sig
;
4564 evthread
->suspend
.waitstatus
= ws
;
4566 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4567 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4568 evthread
->suspend
.waitstatus_pending_p
= 1;
4570 set_executing (this, event_ptid
, false);
4571 set_running (this, event_ptid
, false);
4572 get_remote_thread_info (evthread
)->set_not_resumed ();
4575 /* "Notice" the new inferiors before anything related to
4576 registers/memory. */
4577 for (inferior
*inf
: all_non_exited_inferiors (this))
4579 inf
->needs_setup
= 1;
4583 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4584 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4589 /* If all-stop on top of non-stop, pause all threads. Note this
4590 records the threads' stop pc, so must be done after "noticing"
4594 stop_all_threads ();
4596 /* If all threads of an inferior were already stopped, we
4597 haven't setup the inferior yet. */
4598 for (inferior
*inf
: all_non_exited_inferiors (this))
4600 if (inf
->needs_setup
)
4602 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4603 switch_to_thread_no_regs (thread
);
4609 /* Now go over all threads that are stopped, and print their current
4610 frame. If all-stop, then if there's a signalled thread, pick
4612 for (thread_info
*thread
: all_non_exited_threads (this))
4618 thread
->set_running (false);
4619 else if (thread
->state
!= THREAD_STOPPED
)
4622 if (selected
== NULL
4623 && thread
->suspend
.waitstatus_pending_p
)
4626 if (lowest_stopped
== NULL
4627 || thread
->inf
->num
< lowest_stopped
->inf
->num
4628 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4629 lowest_stopped
= thread
;
4632 print_one_stopped_thread (thread
);
4635 /* In all-stop, we only print the status of one thread, and leave
4636 others with their status pending. */
4639 thread_info
*thread
= selected
;
4641 thread
= lowest_stopped
;
4645 print_one_stopped_thread (thread
);
4648 /* For "info program". */
4649 thread_info
*thread
= inferior_thread ();
4650 if (thread
->state
== THREAD_STOPPED
)
4651 set_last_target_status (this, inferior_ptid
, thread
->suspend
.waitstatus
);
4654 /* Start the remote connection and sync state. */
4657 remote_target::start_remote (int from_tty
, int extended_p
)
4659 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
4661 struct remote_state
*rs
= get_remote_state ();
4662 struct packet_config
*noack_config
;
4664 /* Signal other parts that we're going through the initial setup,
4665 and so things may not be stable yet. E.g., we don't try to
4666 install tracepoints until we've relocated symbols. Also, a
4667 Ctrl-C before we're connected and synced up can't interrupt the
4668 target. Instead, it offers to drop the (potentially wedged)
4670 rs
->starting_up
= true;
4674 if (interrupt_on_connect
)
4675 send_interrupt_sequence ();
4677 /* Ack any packet which the remote side has already sent. */
4678 remote_serial_write ("+", 1);
4680 /* The first packet we send to the target is the optional "supported
4681 packets" request. If the target can answer this, it will tell us
4682 which later probes to skip. */
4683 remote_query_supported ();
4685 /* If the stub wants to get a QAllow, compose one and send it. */
4686 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4689 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4690 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4691 as a reply to known packet. For packet "vFile:setfs:" it is an
4692 invalid reply and GDB would return error in
4693 remote_hostio_set_filesystem, making remote files access impossible.
4694 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4695 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4697 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4699 putpkt (v_mustreplyempty
);
4700 getpkt (&rs
->buf
, 0);
4701 if (strcmp (rs
->buf
.data (), "OK") == 0)
4702 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4703 else if (strcmp (rs
->buf
.data (), "") != 0)
4704 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4708 /* Next, we possibly activate noack mode.
4710 If the QStartNoAckMode packet configuration is set to AUTO,
4711 enable noack mode if the stub reported a wish for it with
4714 If set to TRUE, then enable noack mode even if the stub didn't
4715 report it in qSupported. If the stub doesn't reply OK, the
4716 session ends with an error.
4718 If FALSE, then don't activate noack mode, regardless of what the
4719 stub claimed should be the default with qSupported. */
4721 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4722 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4724 putpkt ("QStartNoAckMode");
4725 getpkt (&rs
->buf
, 0);
4726 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4732 /* Tell the remote that we are using the extended protocol. */
4734 getpkt (&rs
->buf
, 0);
4737 /* Let the target know which signals it is allowed to pass down to
4739 update_signals_program_target ();
4741 /* Next, if the target can specify a description, read it. We do
4742 this before anything involving memory or registers. */
4743 target_find_description ();
4745 /* Next, now that we know something about the target, update the
4746 address spaces in the program spaces. */
4747 update_address_spaces ();
4749 /* On OSs where the list of libraries is global to all
4750 processes, we fetch them early. */
4751 if (gdbarch_has_global_solist (target_gdbarch ()))
4752 solib_add (NULL
, from_tty
, auto_solib_add
);
4754 if (target_is_non_stop_p ())
4756 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4757 error (_("Non-stop mode requested, but remote "
4758 "does not support non-stop"));
4760 putpkt ("QNonStop:1");
4761 getpkt (&rs
->buf
, 0);
4763 if (strcmp (rs
->buf
.data (), "OK") != 0)
4764 error (_("Remote refused setting non-stop mode with: %s"),
4767 /* Find about threads and processes the stub is already
4768 controlling. We default to adding them in the running state.
4769 The '?' query below will then tell us about which threads are
4771 this->update_thread_list ();
4773 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4775 /* Don't assume that the stub can operate in all-stop mode.
4776 Request it explicitly. */
4777 putpkt ("QNonStop:0");
4778 getpkt (&rs
->buf
, 0);
4780 if (strcmp (rs
->buf
.data (), "OK") != 0)
4781 error (_("Remote refused setting all-stop mode with: %s"),
4785 /* Upload TSVs regardless of whether the target is running or not. The
4786 remote stub, such as GDBserver, may have some predefined or builtin
4787 TSVs, even if the target is not running. */
4788 if (get_trace_status (current_trace_status ()) != -1)
4790 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4792 upload_trace_state_variables (&uploaded_tsvs
);
4793 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4796 /* Check whether the target is running now. */
4798 getpkt (&rs
->buf
, 0);
4800 if (!target_is_non_stop_p ())
4802 char *wait_status
= NULL
;
4804 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4807 error (_("The target is not running (try extended-remote?)"));
4809 /* We're connected, but not running. Drop out before we
4810 call start_remote. */
4811 rs
->starting_up
= false;
4816 /* Save the reply for later. */
4817 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4818 strcpy (wait_status
, rs
->buf
.data ());
4821 /* Fetch thread list. */
4822 target_update_thread_list ();
4824 /* Let the stub know that we want it to return the thread. */
4825 set_continue_thread (minus_one_ptid
);
4827 if (thread_count (this) == 0)
4829 /* Target has no concept of threads at all. GDB treats
4830 non-threaded target as single-threaded; add a main
4832 thread_info
*tp
= add_current_inferior_and_thread (wait_status
);
4833 get_remote_thread_info (tp
)->set_resumed ();
4837 /* We have thread information; select the thread the target
4838 says should be current. If we're reconnecting to a
4839 multi-threaded program, this will ideally be the thread
4840 that last reported an event before GDB disconnected. */
4841 ptid_t curr_thread
= get_current_thread (wait_status
);
4842 if (curr_thread
== null_ptid
)
4844 /* Odd... The target was able to list threads, but not
4845 tell us which thread was current (no "thread"
4846 register in T stop reply?). Just pick the first
4847 thread in the thread list then. */
4849 remote_debug_printf ("warning: couldn't determine remote "
4850 "current thread; picking first in list.");
4852 for (thread_info
*tp
: all_non_exited_threads (this,
4855 switch_to_thread (tp
);
4860 switch_to_thread (find_thread_ptid (this, curr_thread
));
4863 /* init_wait_for_inferior should be called before get_offsets in order
4864 to manage `inserted' flag in bp loc in a correct state.
4865 breakpoint_init_inferior, called from init_wait_for_inferior, set
4866 `inserted' flag to 0, while before breakpoint_re_set, called from
4867 start_remote, set `inserted' flag to 1. In the initialization of
4868 inferior, breakpoint_init_inferior should be called first, and then
4869 breakpoint_re_set can be called. If this order is broken, state of
4870 `inserted' flag is wrong, and cause some problems on breakpoint
4872 init_wait_for_inferior ();
4874 get_offsets (); /* Get text, data & bss offsets. */
4876 /* If we could not find a description using qXfer, and we know
4877 how to do it some other way, try again. This is not
4878 supported for non-stop; it could be, but it is tricky if
4879 there are no stopped threads when we connect. */
4880 if (remote_read_description_p (this)
4881 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4883 target_clear_description ();
4884 target_find_description ();
4887 /* Use the previously fetched status. */
4888 gdb_assert (wait_status
!= NULL
);
4889 strcpy (rs
->buf
.data (), wait_status
);
4890 rs
->cached_wait_status
= 1;
4892 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4896 /* Clear WFI global state. Do this before finding about new
4897 threads and inferiors, and setting the current inferior.
4898 Otherwise we would clear the proceed status of the current
4899 inferior when we want its stop_soon state to be preserved
4900 (see notice_new_inferior). */
4901 init_wait_for_inferior ();
4903 /* In non-stop, we will either get an "OK", meaning that there
4904 are no stopped threads at this time; or, a regular stop
4905 reply. In the latter case, there may be more than one thread
4906 stopped --- we pull them all out using the vStopped
4908 if (strcmp (rs
->buf
.data (), "OK") != 0)
4910 struct notif_client
*notif
= ¬if_client_stop
;
4912 /* remote_notif_get_pending_replies acks this one, and gets
4914 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4915 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4916 remote_notif_get_pending_events (notif
);
4919 if (thread_count (this) == 0)
4922 error (_("The target is not running (try extended-remote?)"));
4924 /* We're connected, but not running. Drop out before we
4925 call start_remote. */
4926 rs
->starting_up
= false;
4930 /* Report all signals during attach/startup. */
4933 /* If there are already stopped threads, mark them stopped and
4934 report their stops before giving the prompt to the user. */
4935 process_initial_stop_replies (from_tty
);
4937 if (target_can_async_p ())
4941 /* If we connected to a live target, do some additional setup. */
4942 if (target_has_execution ())
4944 /* No use without a symbol-file. */
4945 if (current_program_space
->symfile_object_file
)
4946 remote_check_symbols ();
4949 /* Possibly the target has been engaged in a trace run started
4950 previously; find out where things are at. */
4951 if (get_trace_status (current_trace_status ()) != -1)
4953 struct uploaded_tp
*uploaded_tps
= NULL
;
4955 if (current_trace_status ()->running
)
4956 printf_filtered (_("Trace is already running on the target.\n"));
4958 upload_tracepoints (&uploaded_tps
);
4960 merge_uploaded_tracepoints (&uploaded_tps
);
4963 /* Possibly the target has been engaged in a btrace record started
4964 previously; find out where things are at. */
4965 remote_btrace_maybe_reopen ();
4967 /* The thread and inferior lists are now synchronized with the
4968 target, our symbols have been relocated, and we're merged the
4969 target's tracepoints with ours. We're done with basic start
4971 rs
->starting_up
= false;
4973 /* Maybe breakpoints are global and need to be inserted now. */
4974 if (breakpoints_should_be_inserted_now ())
4975 insert_breakpoints ();
4979 remote_target::connection_string ()
4981 remote_state
*rs
= get_remote_state ();
4983 if (rs
->remote_desc
->name
!= NULL
)
4984 return rs
->remote_desc
->name
;
4989 /* Open a connection to a remote debugger.
4990 NAME is the filename used for communication. */
4993 remote_target::open (const char *name
, int from_tty
)
4995 open_1 (name
, from_tty
, 0);
4998 /* Open a connection to a remote debugger using the extended
4999 remote gdb protocol. NAME is the filename used for communication. */
5002 extended_remote_target::open (const char *name
, int from_tty
)
5004 open_1 (name
, from_tty
, 1 /*extended_p */);
5007 /* Reset all packets back to "unknown support". Called when opening a
5008 new connection to a remote target. */
5011 reset_all_packet_configs_support (void)
5015 for (i
= 0; i
< PACKET_MAX
; i
++)
5016 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5019 /* Initialize all packet configs. */
5022 init_all_packet_configs (void)
5026 for (i
= 0; i
< PACKET_MAX
; i
++)
5028 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
5029 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5033 /* Symbol look-up. */
5036 remote_target::remote_check_symbols ()
5041 /* The remote side has no concept of inferiors that aren't running
5042 yet, it only knows about running processes. If we're connected
5043 but our current inferior is not running, we should not invite the
5044 remote target to request symbol lookups related to its
5045 (unrelated) current process. */
5046 if (!target_has_execution ())
5049 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
5052 /* Make sure the remote is pointing at the right process. Note
5053 there's no way to select "no process". */
5054 set_general_process ();
5056 /* Allocate a message buffer. We can't reuse the input buffer in RS,
5057 because we need both at the same time. */
5058 gdb::char_vector
msg (get_remote_packet_size ());
5059 gdb::char_vector
reply (get_remote_packet_size ());
5061 /* Invite target to request symbol lookups. */
5063 putpkt ("qSymbol::");
5065 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
5067 while (startswith (reply
.data (), "qSymbol:"))
5069 struct bound_minimal_symbol sym
;
5072 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
5075 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
5076 if (sym
.minsym
== NULL
)
5077 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
5081 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5082 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
5084 /* If this is a function address, return the start of code
5085 instead of any data function descriptor. */
5086 sym_addr
= gdbarch_convert_from_func_ptr_addr
5087 (target_gdbarch (), sym_addr
, current_inferior ()->top_target ());
5089 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
5090 phex_nz (sym_addr
, addr_size
), &reply
[8]);
5093 putpkt (msg
.data ());
5098 static struct serial
*
5099 remote_serial_open (const char *name
)
5101 static int udp_warning
= 0;
5103 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
5104 of in ser-tcp.c, because it is the remote protocol assuming that the
5105 serial connection is reliable and not the serial connection promising
5107 if (!udp_warning
&& startswith (name
, "udp:"))
5109 warning (_("The remote protocol may be unreliable over UDP.\n"
5110 "Some events may be lost, rendering further debugging "
5115 return serial_open (name
);
5118 /* Inform the target of our permission settings. The permission flags
5119 work without this, but if the target knows the settings, it can do
5120 a couple things. First, it can add its own check, to catch cases
5121 that somehow manage to get by the permissions checks in target
5122 methods. Second, if the target is wired to disallow particular
5123 settings (for instance, a system in the field that is not set up to
5124 be able to stop at a breakpoint), it can object to any unavailable
5128 remote_target::set_permissions ()
5130 struct remote_state
*rs
= get_remote_state ();
5132 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
5133 "WriteReg:%x;WriteMem:%x;"
5134 "InsertBreak:%x;InsertTrace:%x;"
5135 "InsertFastTrace:%x;Stop:%x",
5136 may_write_registers
, may_write_memory
,
5137 may_insert_breakpoints
, may_insert_tracepoints
,
5138 may_insert_fast_tracepoints
, may_stop
);
5140 getpkt (&rs
->buf
, 0);
5142 /* If the target didn't like the packet, warn the user. Do not try
5143 to undo the user's settings, that would just be maddening. */
5144 if (strcmp (rs
->buf
.data (), "OK") != 0)
5145 warning (_("Remote refused setting permissions with: %s"),
5149 /* This type describes each known response to the qSupported
5151 struct protocol_feature
5153 /* The name of this protocol feature. */
5156 /* The default for this protocol feature. */
5157 enum packet_support default_support
;
5159 /* The function to call when this feature is reported, or after
5160 qSupported processing if the feature is not supported.
5161 The first argument points to this structure. The second
5162 argument indicates whether the packet requested support be
5163 enabled, disabled, or probed (or the default, if this function
5164 is being called at the end of processing and this feature was
5165 not reported). The third argument may be NULL; if not NULL, it
5166 is a NUL-terminated string taken from the packet following
5167 this feature's name and an equals sign. */
5168 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5169 enum packet_support
, const char *);
5171 /* The corresponding packet for this feature. Only used if
5172 FUNC is remote_supported_packet. */
5177 remote_supported_packet (remote_target
*remote
,
5178 const struct protocol_feature
*feature
,
5179 enum packet_support support
,
5180 const char *argument
)
5184 warning (_("Remote qSupported response supplied an unexpected value for"
5185 " \"%s\"."), feature
->name
);
5189 remote_protocol_packets
[feature
->packet
].support
= support
;
5193 remote_target::remote_packet_size (const protocol_feature
*feature
,
5194 enum packet_support support
, const char *value
)
5196 struct remote_state
*rs
= get_remote_state ();
5201 if (support
!= PACKET_ENABLE
)
5204 if (value
== NULL
|| *value
== '\0')
5206 warning (_("Remote target reported \"%s\" without a size."),
5212 packet_size
= strtol (value
, &value_end
, 16);
5213 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5215 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5216 feature
->name
, value
);
5220 /* Record the new maximum packet size. */
5221 rs
->explicit_packet_size
= packet_size
;
5225 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5226 enum packet_support support
, const char *value
)
5228 remote
->remote_packet_size (feature
, support
, value
);
5231 static const struct protocol_feature remote_protocol_features
[] = {
5232 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5233 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5234 PACKET_qXfer_auxv
},
5235 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5236 PACKET_qXfer_exec_file
},
5237 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5238 PACKET_qXfer_features
},
5239 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5240 PACKET_qXfer_libraries
},
5241 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5242 PACKET_qXfer_libraries_svr4
},
5243 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5244 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5245 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5246 PACKET_qXfer_memory_map
},
5247 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5248 PACKET_qXfer_osdata
},
5249 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5250 PACKET_qXfer_threads
},
5251 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5252 PACKET_qXfer_traceframe_info
},
5253 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5254 PACKET_QPassSignals
},
5255 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5256 PACKET_QCatchSyscalls
},
5257 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5258 PACKET_QProgramSignals
},
5259 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5260 PACKET_QSetWorkingDir
},
5261 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5262 PACKET_QStartupWithShell
},
5263 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5264 PACKET_QEnvironmentHexEncoded
},
5265 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5266 PACKET_QEnvironmentReset
},
5267 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5268 PACKET_QEnvironmentUnset
},
5269 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5270 PACKET_QStartNoAckMode
},
5271 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5272 PACKET_multiprocess_feature
},
5273 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5274 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5275 PACKET_qXfer_siginfo_read
},
5276 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5277 PACKET_qXfer_siginfo_write
},
5278 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5279 PACKET_ConditionalTracepoints
},
5280 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5281 PACKET_ConditionalBreakpoints
},
5282 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5283 PACKET_BreakpointCommands
},
5284 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5285 PACKET_FastTracepoints
},
5286 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5287 PACKET_StaticTracepoints
},
5288 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5289 PACKET_InstallInTrace
},
5290 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5291 PACKET_DisconnectedTracing_feature
},
5292 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5294 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5296 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5297 PACKET_TracepointSource
},
5298 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5300 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5301 PACKET_EnableDisableTracepoints_feature
},
5302 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5303 PACKET_qXfer_fdpic
},
5304 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5306 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5307 PACKET_QDisableRandomization
},
5308 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5309 { "QTBuffer:size", PACKET_DISABLE
,
5310 remote_supported_packet
, PACKET_QTBuffer_size
},
5311 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5312 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5313 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5314 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5315 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5316 PACKET_qXfer_btrace
},
5317 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5318 PACKET_qXfer_btrace_conf
},
5319 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5320 PACKET_Qbtrace_conf_bts_size
},
5321 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5322 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5323 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5324 PACKET_fork_event_feature
},
5325 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5326 PACKET_vfork_event_feature
},
5327 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5328 PACKET_exec_event_feature
},
5329 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5330 PACKET_Qbtrace_conf_pt_size
},
5331 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5332 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5333 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5334 { "memory-tagging", PACKET_DISABLE
, remote_supported_packet
,
5335 PACKET_memory_tagging_feature
},
5338 static char *remote_support_xml
;
5340 /* Register string appended to "xmlRegisters=" in qSupported query. */
5343 register_remote_support_xml (const char *xml
)
5345 #if defined(HAVE_LIBEXPAT)
5346 if (remote_support_xml
== NULL
)
5347 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5350 char *copy
= xstrdup (remote_support_xml
+ 13);
5352 char *p
= strtok_r (copy
, ",", &saveptr
);
5356 if (strcmp (p
, xml
) == 0)
5363 while ((p
= strtok_r (NULL
, ",", &saveptr
)) != NULL
);
5366 remote_support_xml
= reconcat (remote_support_xml
,
5367 remote_support_xml
, ",", xml
,
5374 remote_query_supported_append (std::string
*msg
, const char *append
)
5378 msg
->append (append
);
5382 remote_target::remote_query_supported ()
5384 struct remote_state
*rs
= get_remote_state ();
5387 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5389 /* The packet support flags are handled differently for this packet
5390 than for most others. We treat an error, a disabled packet, and
5391 an empty response identically: any features which must be reported
5392 to be used will be automatically disabled. An empty buffer
5393 accomplishes this, since that is also the representation for a list
5394 containing no features. */
5397 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5401 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5402 remote_query_supported_append (&q
, "multiprocess+");
5404 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5405 remote_query_supported_append (&q
, "swbreak+");
5406 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5407 remote_query_supported_append (&q
, "hwbreak+");
5409 remote_query_supported_append (&q
, "qRelocInsn+");
5411 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5412 != AUTO_BOOLEAN_FALSE
)
5413 remote_query_supported_append (&q
, "fork-events+");
5414 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5415 != AUTO_BOOLEAN_FALSE
)
5416 remote_query_supported_append (&q
, "vfork-events+");
5417 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5418 != AUTO_BOOLEAN_FALSE
)
5419 remote_query_supported_append (&q
, "exec-events+");
5421 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5422 remote_query_supported_append (&q
, "vContSupported+");
5424 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5425 remote_query_supported_append (&q
, "QThreadEvents+");
5427 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5428 remote_query_supported_append (&q
, "no-resumed+");
5430 if (packet_set_cmd_state (PACKET_memory_tagging_feature
)
5431 != AUTO_BOOLEAN_FALSE
)
5432 remote_query_supported_append (&q
, "memory-tagging+");
5434 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5435 the qSupported:xmlRegisters=i386 handling. */
5436 if (remote_support_xml
!= NULL
5437 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5438 remote_query_supported_append (&q
, remote_support_xml
);
5440 q
= "qSupported:" + q
;
5441 putpkt (q
.c_str ());
5443 getpkt (&rs
->buf
, 0);
5445 /* If an error occured, warn, but do not return - just reset the
5446 buffer to empty and go on to disable features. */
5447 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5450 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5455 memset (seen
, 0, sizeof (seen
));
5457 next
= rs
->buf
.data ();
5460 enum packet_support is_supported
;
5461 char *p
, *end
, *name_end
, *value
;
5463 /* First separate out this item from the rest of the packet. If
5464 there's another item after this, we overwrite the separator
5465 (terminated strings are much easier to work with). */
5467 end
= strchr (p
, ';');
5470 end
= p
+ strlen (p
);
5480 warning (_("empty item in \"qSupported\" response"));
5485 name_end
= strchr (p
, '=');
5488 /* This is a name=value entry. */
5489 is_supported
= PACKET_ENABLE
;
5490 value
= name_end
+ 1;
5499 is_supported
= PACKET_ENABLE
;
5503 is_supported
= PACKET_DISABLE
;
5507 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5511 warning (_("unrecognized item \"%s\" "
5512 "in \"qSupported\" response"), p
);
5518 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5519 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5521 const struct protocol_feature
*feature
;
5524 feature
= &remote_protocol_features
[i
];
5525 feature
->func (this, feature
, is_supported
, value
);
5530 /* If we increased the packet size, make sure to increase the global
5531 buffer size also. We delay this until after parsing the entire
5532 qSupported packet, because this is the same buffer we were
5534 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5535 rs
->buf
.resize (rs
->explicit_packet_size
);
5537 /* Handle the defaults for unmentioned features. */
5538 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5541 const struct protocol_feature
*feature
;
5543 feature
= &remote_protocol_features
[i
];
5544 feature
->func (this, feature
, feature
->default_support
, NULL
);
5548 /* Serial QUIT handler for the remote serial descriptor.
5550 Defers handling a Ctrl-C until we're done with the current
5551 command/response packet sequence, unless:
5553 - We're setting up the connection. Don't send a remote interrupt
5554 request, as we're not fully synced yet. Quit immediately
5557 - The target has been resumed in the foreground
5558 (target_terminal::is_ours is false) with a synchronous resume
5559 packet, and we're blocked waiting for the stop reply, thus a
5560 Ctrl-C should be immediately sent to the target.
5562 - We get a second Ctrl-C while still within the same serial read or
5563 write. In that case the serial is seemingly wedged --- offer to
5566 - We see a second Ctrl-C without target response, after having
5567 previously interrupted the target. In that case the target/stub
5568 is probably wedged --- offer to quit/disconnect.
5572 remote_target::remote_serial_quit_handler ()
5574 struct remote_state
*rs
= get_remote_state ();
5576 if (check_quit_flag ())
5578 /* If we're starting up, we're not fully synced yet. Quit
5580 if (rs
->starting_up
)
5582 else if (rs
->got_ctrlc_during_io
)
5584 if (query (_("The target is not responding to GDB commands.\n"
5585 "Stop debugging it? ")))
5586 remote_unpush_and_throw (this);
5588 /* If ^C has already been sent once, offer to disconnect. */
5589 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5591 /* All-stop protocol, and blocked waiting for stop reply. Send
5592 an interrupt request. */
5593 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5594 target_interrupt ();
5596 rs
->got_ctrlc_during_io
= 1;
5600 /* The remote_target that is current while the quit handler is
5601 overridden with remote_serial_quit_handler. */
5602 static remote_target
*curr_quit_handler_target
;
5605 remote_serial_quit_handler ()
5607 curr_quit_handler_target
->remote_serial_quit_handler ();
5610 /* Remove the remote target from the target stack of each inferior
5611 that is using it. Upper targets depend on it so remove them
5615 remote_unpush_target (remote_target
*target
)
5617 /* We have to unpush the target from all inferiors, even those that
5619 scoped_restore_current_inferior restore_current_inferior
;
5621 for (inferior
*inf
: all_inferiors (target
))
5623 switch_to_inferior_no_thread (inf
);
5624 pop_all_targets_at_and_above (process_stratum
);
5625 generic_mourn_inferior ();
5628 /* Don't rely on target_close doing this when the target is popped
5629 from the last remote inferior above, because something may be
5630 holding a reference to the target higher up on the stack, meaning
5631 target_close won't be called yet. We lost the connection to the
5632 target, so clear these now, otherwise we may later throw
5633 TARGET_CLOSE_ERROR while trying to tell the remote target to
5635 fileio_handles_invalidate_target (target
);
5639 remote_unpush_and_throw (remote_target
*target
)
5641 remote_unpush_target (target
);
5642 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5646 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5648 remote_target
*curr_remote
= get_current_remote_target ();
5651 error (_("To open a remote debug connection, you need to specify what\n"
5652 "serial device is attached to the remote system\n"
5653 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5655 /* If we're connected to a running target, target_preopen will kill it.
5656 Ask this question first, before target_preopen has a chance to kill
5658 if (curr_remote
!= NULL
&& !target_has_execution ())
5661 && !query (_("Already connected to a remote target. Disconnect? ")))
5662 error (_("Still connected."));
5665 /* Here the possibly existing remote target gets unpushed. */
5666 target_preopen (from_tty
);
5668 remote_fileio_reset ();
5669 reopen_exec_file ();
5672 remote_target
*remote
5673 = (extended_p
? new extended_remote_target () : new remote_target ());
5674 target_ops_up
target_holder (remote
);
5676 remote_state
*rs
= remote
->get_remote_state ();
5678 /* See FIXME above. */
5679 if (!target_async_permitted
)
5680 rs
->wait_forever_enabled_p
= 1;
5682 rs
->remote_desc
= remote_serial_open (name
);
5683 if (!rs
->remote_desc
)
5684 perror_with_name (name
);
5686 if (baud_rate
!= -1)
5688 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5690 /* The requested speed could not be set. Error out to
5691 top level after closing remote_desc. Take care to
5692 set remote_desc to NULL to avoid closing remote_desc
5694 serial_close (rs
->remote_desc
);
5695 rs
->remote_desc
= NULL
;
5696 perror_with_name (name
);
5700 serial_setparity (rs
->remote_desc
, serial_parity
);
5701 serial_raw (rs
->remote_desc
);
5703 /* If there is something sitting in the buffer we might take it as a
5704 response to a command, which would be bad. */
5705 serial_flush_input (rs
->remote_desc
);
5709 puts_filtered ("Remote debugging using ");
5710 puts_filtered (name
);
5711 puts_filtered ("\n");
5714 /* Switch to using the remote target now. */
5715 current_inferior ()->push_target (std::move (target_holder
));
5717 /* Register extra event sources in the event loop. */
5718 rs
->remote_async_inferior_event_token
5719 = create_async_event_handler (remote_async_inferior_event_handler
, nullptr,
5721 rs
->notif_state
= remote_notif_state_allocate (remote
);
5723 /* Reset the target state; these things will be queried either by
5724 remote_query_supported or as they are needed. */
5725 reset_all_packet_configs_support ();
5726 rs
->cached_wait_status
= 0;
5727 rs
->explicit_packet_size
= 0;
5729 rs
->extended
= extended_p
;
5730 rs
->waiting_for_stop_reply
= 0;
5731 rs
->ctrlc_pending_p
= 0;
5732 rs
->got_ctrlc_during_io
= 0;
5734 rs
->general_thread
= not_sent_ptid
;
5735 rs
->continue_thread
= not_sent_ptid
;
5736 rs
->remote_traceframe_number
= -1;
5738 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5740 /* Probe for ability to use "ThreadInfo" query, as required. */
5741 rs
->use_threadinfo_query
= 1;
5742 rs
->use_threadextra_query
= 1;
5744 rs
->readahead_cache
.invalidate ();
5746 if (target_async_permitted
)
5748 /* FIXME: cagney/1999-09-23: During the initial connection it is
5749 assumed that the target is already ready and able to respond to
5750 requests. Unfortunately remote_start_remote() eventually calls
5751 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5752 around this. Eventually a mechanism that allows
5753 wait_for_inferior() to expect/get timeouts will be
5755 rs
->wait_forever_enabled_p
= 0;
5758 /* First delete any symbols previously loaded from shared libraries. */
5759 no_shared_libraries (NULL
, 0);
5761 /* Start the remote connection. If error() or QUIT, discard this
5762 target (we'd otherwise be in an inconsistent state) and then
5763 propogate the error on up the exception chain. This ensures that
5764 the caller doesn't stumble along blindly assuming that the
5765 function succeeded. The CLI doesn't have this problem but other
5766 UI's, such as MI do.
5768 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5769 this function should return an error indication letting the
5770 caller restore the previous state. Unfortunately the command
5771 ``target remote'' is directly wired to this function making that
5772 impossible. On a positive note, the CLI side of this problem has
5773 been fixed - the function set_cmd_context() makes it possible for
5774 all the ``target ....'' commands to share a common callback
5775 function. See cli-dump.c. */
5780 remote
->start_remote (from_tty
, extended_p
);
5782 catch (const gdb_exception
&ex
)
5784 /* Pop the partially set up target - unless something else did
5785 already before throwing the exception. */
5786 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5787 remote_unpush_target (remote
);
5792 remote_btrace_reset (rs
);
5794 if (target_async_permitted
)
5795 rs
->wait_forever_enabled_p
= 1;
5798 /* Detach the specified process. */
5801 remote_target::remote_detach_pid (int pid
)
5803 struct remote_state
*rs
= get_remote_state ();
5805 /* This should not be necessary, but the handling for D;PID in
5806 GDBserver versions prior to 8.2 incorrectly assumes that the
5807 selected process points to the same process we're detaching,
5808 leading to misbehavior (and possibly GDBserver crashing) when it
5809 does not. Since it's easy and cheap, work around it by forcing
5810 GDBserver to select GDB's current process. */
5811 set_general_process ();
5813 if (remote_multi_process_p (rs
))
5814 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5816 strcpy (rs
->buf
.data (), "D");
5819 getpkt (&rs
->buf
, 0);
5821 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5823 else if (rs
->buf
[0] == '\0')
5824 error (_("Remote doesn't know how to detach"));
5826 error (_("Can't detach process."));
5829 /* This detaches a program to which we previously attached, using
5830 inferior_ptid to identify the process. After this is done, GDB
5831 can be used to debug some other program. We better not have left
5832 any breakpoints in the target program or it'll die when it hits
5836 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5838 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
5840 int pid
= inferior_ptid
.pid ();
5841 struct remote_state
*rs
= get_remote_state ();
5844 if (!target_has_execution ())
5845 error (_("No process to detach from."));
5847 target_announce_detach (from_tty
);
5849 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
5851 /* If we're in breakpoints-always-inserted mode, or the inferior
5852 is running, we have to remove breakpoints before detaching.
5853 We don't do this in common code instead because not all
5854 targets support removing breakpoints while the target is
5855 running. The remote target / gdbserver does, though. */
5856 remove_breakpoints_inf (current_inferior ());
5859 /* Tell the remote target to detach. */
5860 remote_detach_pid (pid
);
5862 for (thread_info
*thread
: inf
->threads ())
5864 if (!thread
->suspend
.waitstatus_pending_p
)
5867 const target_waitstatus
&ws
= thread
->suspend
.waitstatus
;
5868 if (ws
.kind
!= TARGET_WAITKIND_FORKED
5869 && ws
.kind
!= TARGET_WAITKIND_VFORKED
)
5872 remote_debug_printf ("Detached thread %s has a pending fork event, "
5873 "detaching fork child %d",
5874 thread
->ptid
.to_string ().c_str (),
5875 ws
.value
.related_pid
.pid ());
5877 remote_detach_pid (ws
.value
.related_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 (bool follow_child
, bool detach_fork
)
5933 struct remote_state
*rs
= get_remote_state ();
5934 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5936 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5937 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5939 /* When following the parent and detaching the child, we detach
5940 the child here. For the case of following the child and
5941 detaching the parent, the detach is done in the target-
5942 independent follow fork code in infrun.c. We can't use
5943 target_detach when detaching an unfollowed child because
5944 the client side doesn't know anything about the child. */
5945 if (detach_fork
&& !follow_child
)
5947 /* Detach the fork child. */
5951 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5952 child_pid
= child_ptid
.pid ();
5954 remote_detach_pid (child_pid
);
5959 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5960 in the program space of the new inferior. */
5963 remote_target::follow_exec (inferior
*follow_inf
, ptid_t ptid
,
5964 const char *execd_pathname
)
5966 process_stratum_target::follow_exec (follow_inf
, ptid
, execd_pathname
);
5968 /* We know that this is a target file name, so if it has the "target:"
5969 prefix we strip it off before saving it in the program space. */
5970 if (is_target_filename (execd_pathname
))
5971 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5973 set_pspace_remote_exec_file (follow_inf
->pspace
, execd_pathname
);
5976 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5979 remote_target::disconnect (const char *args
, int from_tty
)
5982 error (_("Argument given to \"disconnect\" when remotely debugging."));
5984 /* Make sure we unpush even the extended remote targets. Calling
5985 target_mourn_inferior won't unpush, and
5986 remote_target::mourn_inferior won't unpush if there is more than
5987 one inferior left. */
5988 remote_unpush_target (this);
5991 puts_filtered ("Ending remote debugging.\n");
5994 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5995 be chatty about it. */
5998 extended_remote_target::attach (const char *args
, int from_tty
)
6000 struct remote_state
*rs
= get_remote_state ();
6002 char *wait_status
= NULL
;
6004 pid
= parse_pid_to_attach (args
);
6006 /* Remote PID can be freely equal to getpid, do not check it here the same
6007 way as in other targets. */
6009 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
6010 error (_("This target does not support attaching to a process"));
6014 const char *exec_file
= get_exec_file (0);
6017 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
6018 target_pid_to_str (ptid_t (pid
)).c_str ());
6020 printf_unfiltered (_("Attaching to %s\n"),
6021 target_pid_to_str (ptid_t (pid
)).c_str ());
6024 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
6026 getpkt (&rs
->buf
, 0);
6028 switch (packet_ok (rs
->buf
,
6029 &remote_protocol_packets
[PACKET_vAttach
]))
6032 if (!target_is_non_stop_p ())
6034 /* Save the reply for later. */
6035 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
6036 strcpy (wait_status
, rs
->buf
.data ());
6038 else if (strcmp (rs
->buf
.data (), "OK") != 0)
6039 error (_("Attaching to %s failed with: %s"),
6040 target_pid_to_str (ptid_t (pid
)).c_str (),
6043 case PACKET_UNKNOWN
:
6044 error (_("This target does not support attaching to a process"));
6046 error (_("Attaching to %s failed"),
6047 target_pid_to_str (ptid_t (pid
)).c_str ());
6050 switch_to_inferior_no_thread (remote_add_inferior (false, pid
, 1, 0));
6052 inferior_ptid
= ptid_t (pid
);
6054 if (target_is_non_stop_p ())
6056 /* Get list of threads. */
6057 update_thread_list ();
6059 thread_info
*thread
= first_thread_of_inferior (current_inferior ());
6060 if (thread
!= nullptr)
6061 switch_to_thread (thread
);
6063 /* Invalidate our notion of the remote current thread. */
6064 record_currthread (rs
, minus_one_ptid
);
6068 /* Now, if we have thread information, update the main thread's
6070 ptid_t curr_ptid
= remote_current_thread (ptid_t (pid
));
6072 /* Add the main thread to the thread list. */
6073 thread_info
*thr
= add_thread_silent (this, curr_ptid
);
6075 switch_to_thread (thr
);
6077 /* Don't consider the thread stopped until we've processed the
6078 saved stop reply. */
6079 set_executing (this, thr
->ptid
, true);
6082 /* Next, if the target can specify a description, read it. We do
6083 this before anything involving memory or registers. */
6084 target_find_description ();
6086 if (!target_is_non_stop_p ())
6088 /* Use the previously fetched status. */
6089 gdb_assert (wait_status
!= NULL
);
6091 if (target_can_async_p ())
6093 struct notif_event
*reply
6094 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
6096 push_stop_reply ((struct stop_reply
*) reply
);
6102 gdb_assert (wait_status
!= NULL
);
6103 strcpy (rs
->buf
.data (), wait_status
);
6104 rs
->cached_wait_status
= 1;
6109 gdb_assert (wait_status
== NULL
);
6111 gdb_assert (target_can_async_p ());
6116 /* Implementation of the to_post_attach method. */
6119 extended_remote_target::post_attach (int pid
)
6121 /* Get text, data & bss offsets. */
6124 /* In certain cases GDB might not have had the chance to start
6125 symbol lookup up until now. This could happen if the debugged
6126 binary is not using shared libraries, the vsyscall page is not
6127 present (on Linux) and the binary itself hadn't changed since the
6128 debugging process was started. */
6129 if (current_program_space
->symfile_object_file
!= NULL
)
6130 remote_check_symbols();
6134 /* Check for the availability of vCont. This function should also check
6138 remote_target::remote_vcont_probe ()
6140 remote_state
*rs
= get_remote_state ();
6143 strcpy (rs
->buf
.data (), "vCont?");
6145 getpkt (&rs
->buf
, 0);
6146 buf
= rs
->buf
.data ();
6148 /* Make sure that the features we assume are supported. */
6149 if (startswith (buf
, "vCont"))
6152 int support_c
, support_C
;
6154 rs
->supports_vCont
.s
= 0;
6155 rs
->supports_vCont
.S
= 0;
6158 rs
->supports_vCont
.t
= 0;
6159 rs
->supports_vCont
.r
= 0;
6160 while (p
&& *p
== ';')
6163 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6164 rs
->supports_vCont
.s
= 1;
6165 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6166 rs
->supports_vCont
.S
= 1;
6167 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6169 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6171 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6172 rs
->supports_vCont
.t
= 1;
6173 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6174 rs
->supports_vCont
.r
= 1;
6176 p
= strchr (p
, ';');
6179 /* If c, and C are not all supported, we can't use vCont. Clearing
6180 BUF will make packet_ok disable the packet. */
6181 if (!support_c
|| !support_C
)
6185 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
6186 rs
->supports_vCont_probed
= true;
6189 /* Helper function for building "vCont" resumptions. Write a
6190 resumption to P. ENDP points to one-passed-the-end of the buffer
6191 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6192 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6193 resumed thread should be single-stepped and/or signalled. If PTID
6194 equals minus_one_ptid, then all threads are resumed; if PTID
6195 represents a process, then all threads of the process are resumed;
6196 the thread to be stepped and/or signalled is given in the global
6200 remote_target::append_resumption (char *p
, char *endp
,
6201 ptid_t ptid
, int step
, gdb_signal siggnal
)
6203 struct remote_state
*rs
= get_remote_state ();
6205 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6206 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6208 /* GDB is willing to range step. */
6209 && use_range_stepping
6210 /* Target supports range stepping. */
6211 && rs
->supports_vCont
.r
6212 /* We don't currently support range stepping multiple
6213 threads with a wildcard (though the protocol allows it,
6214 so stubs shouldn't make an active effort to forbid
6216 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6218 struct thread_info
*tp
;
6220 if (ptid
== minus_one_ptid
)
6222 /* If we don't know about the target thread's tid, then
6223 we're resuming magic_null_ptid (see caller). */
6224 tp
= find_thread_ptid (this, magic_null_ptid
);
6227 tp
= find_thread_ptid (this, ptid
);
6228 gdb_assert (tp
!= NULL
);
6230 if (tp
->control
.may_range_step
)
6232 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6234 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6235 phex_nz (tp
->control
.step_range_start
,
6237 phex_nz (tp
->control
.step_range_end
,
6241 p
+= xsnprintf (p
, endp
- p
, ";s");
6244 p
+= xsnprintf (p
, endp
- p
, ";s");
6245 else if (siggnal
!= GDB_SIGNAL_0
)
6246 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6248 p
+= xsnprintf (p
, endp
- p
, ";c");
6250 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6254 /* All (-1) threads of process. */
6255 nptid
= ptid_t (ptid
.pid (), -1, 0);
6257 p
+= xsnprintf (p
, endp
- p
, ":");
6258 p
= write_ptid (p
, endp
, nptid
);
6260 else if (ptid
!= minus_one_ptid
)
6262 p
+= xsnprintf (p
, endp
- p
, ":");
6263 p
= write_ptid (p
, endp
, ptid
);
6269 /* Clear the thread's private info on resume. */
6272 resume_clear_thread_private_info (struct thread_info
*thread
)
6274 if (thread
->priv
!= NULL
)
6276 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6278 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6279 priv
->watch_data_address
= 0;
6283 /* Append a vCont continue-with-signal action for threads that have a
6284 non-zero stop signal. */
6287 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6290 for (thread_info
*thread
: all_non_exited_threads (this, ptid
))
6291 if (inferior_ptid
!= thread
->ptid
6292 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
6294 p
= append_resumption (p
, endp
, thread
->ptid
,
6295 0, thread
->suspend
.stop_signal
);
6296 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
6297 resume_clear_thread_private_info (thread
);
6303 /* Set the target running, using the packets that use Hc
6307 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6310 struct remote_state
*rs
= get_remote_state ();
6313 rs
->last_sent_signal
= siggnal
;
6314 rs
->last_sent_step
= step
;
6316 /* The c/s/C/S resume packets use Hc, so set the continue
6318 if (ptid
== minus_one_ptid
)
6319 set_continue_thread (any_thread_ptid
);
6321 set_continue_thread (ptid
);
6323 for (thread_info
*thread
: all_non_exited_threads (this))
6324 resume_clear_thread_private_info (thread
);
6326 buf
= rs
->buf
.data ();
6327 if (::execution_direction
== EXEC_REVERSE
)
6329 /* We don't pass signals to the target in reverse exec mode. */
6330 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6331 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6334 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6335 error (_("Remote reverse-step not supported."));
6336 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6337 error (_("Remote reverse-continue not supported."));
6339 strcpy (buf
, step
? "bs" : "bc");
6341 else if (siggnal
!= GDB_SIGNAL_0
)
6343 buf
[0] = step
? 'S' : 'C';
6344 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6345 buf
[2] = tohex (((int) siggnal
) & 0xf);
6349 strcpy (buf
, step
? "s" : "c");
6354 /* Resume the remote inferior by using a "vCont" packet. The thread
6355 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6356 resumed thread should be single-stepped and/or signalled. If PTID
6357 equals minus_one_ptid, then all threads are resumed; the thread to
6358 be stepped and/or signalled is given in the global INFERIOR_PTID.
6359 This function returns non-zero iff it resumes the inferior.
6361 This function issues a strict subset of all possible vCont commands
6365 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6366 enum gdb_signal siggnal
)
6368 struct remote_state
*rs
= get_remote_state ();
6372 /* No reverse execution actions defined for vCont. */
6373 if (::execution_direction
== EXEC_REVERSE
)
6376 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6377 remote_vcont_probe ();
6379 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6382 p
= rs
->buf
.data ();
6383 endp
= p
+ get_remote_packet_size ();
6385 /* If we could generate a wider range of packets, we'd have to worry
6386 about overflowing BUF. Should there be a generic
6387 "multi-part-packet" packet? */
6389 p
+= xsnprintf (p
, endp
- p
, "vCont");
6391 if (ptid
== magic_null_ptid
)
6393 /* MAGIC_NULL_PTID means that we don't have any active threads,
6394 so we don't have any TID numbers the inferior will
6395 understand. Make sure to only send forms that do not specify
6397 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6399 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6401 /* Resume all threads (of all processes, or of a single
6402 process), with preference for INFERIOR_PTID. This assumes
6403 inferior_ptid belongs to the set of all threads we are about
6405 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6407 /* Step inferior_ptid, with or without signal. */
6408 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6411 /* Also pass down any pending signaled resumption for other
6412 threads not the current. */
6413 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6415 /* And continue others without a signal. */
6416 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6420 /* Scheduler locking; resume only PTID. */
6421 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6424 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6427 if (target_is_non_stop_p ())
6429 /* In non-stop, the stub replies to vCont with "OK". The stop
6430 reply will be reported asynchronously by means of a `%Stop'
6432 getpkt (&rs
->buf
, 0);
6433 if (strcmp (rs
->buf
.data (), "OK") != 0)
6434 error (_("Unexpected vCont reply in non-stop mode: %s"),
6441 /* Tell the remote machine to resume. */
6444 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6446 struct remote_state
*rs
= get_remote_state ();
6448 /* When connected in non-stop mode, the core resumes threads
6449 individually. Resuming remote threads directly in target_resume
6450 would thus result in sending one packet per thread. Instead, to
6451 minimize roundtrip latency, here we just store the resume
6452 request (put the thread in RESUMED_PENDING_VCONT state); the actual remote
6453 resumption will be done in remote_target::commit_resume, where we'll be
6454 able to do vCont action coalescing. */
6455 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6457 remote_thread_info
*remote_thr
;
6459 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6460 remote_thr
= get_remote_thread_info (this, inferior_ptid
);
6462 remote_thr
= get_remote_thread_info (this, ptid
);
6464 /* We don't expect the core to ask to resume an already resumed (from
6465 its point of view) thread. */
6466 gdb_assert (remote_thr
->get_resume_state () == resume_state::NOT_RESUMED
);
6468 remote_thr
->set_resumed_pending_vcont (step
, siggnal
);
6472 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6473 (explained in remote-notif.c:handle_notification) so
6474 remote_notif_process is not called. We need find a place where
6475 it is safe to start a 'vNotif' sequence. It is good to do it
6476 before resuming inferior, because inferior was stopped and no RSP
6477 traffic at that moment. */
6478 if (!target_is_non_stop_p ())
6479 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6481 rs
->last_resume_exec_dir
= ::execution_direction
;
6483 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6484 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6485 remote_resume_with_hc (ptid
, step
, siggnal
);
6487 /* Update resumed state tracked by the remote target. */
6488 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6489 get_remote_thread_info (tp
)->set_resumed ();
6491 /* We are about to start executing the inferior, let's register it
6492 with the event loop. NOTE: this is the one place where all the
6493 execution commands end up. We could alternatively do this in each
6494 of the execution commands in infcmd.c. */
6495 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6496 into infcmd.c in order to allow inferior function calls to work
6497 NOT asynchronously. */
6498 if (target_can_async_p ())
6501 /* We've just told the target to resume. The remote server will
6502 wait for the inferior to stop, and then send a stop reply. In
6503 the mean time, we can't start another command/query ourselves
6504 because the stub wouldn't be ready to process it. This applies
6505 only to the base all-stop protocol, however. In non-stop (which
6506 only supports vCont), the stub replies with an "OK", and is
6507 immediate able to process further serial input. */
6508 if (!target_is_non_stop_p ())
6509 rs
->waiting_for_stop_reply
= 1;
6512 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6514 /* Private per-inferior info for target remote processes. */
6516 struct remote_inferior
: public private_inferior
6518 /* Whether we can send a wildcard vCont for this process. */
6519 bool may_wildcard_vcont
= true;
6522 /* Get the remote private inferior data associated to INF. */
6524 static remote_inferior
*
6525 get_remote_inferior (inferior
*inf
)
6527 if (inf
->priv
== NULL
)
6528 inf
->priv
.reset (new remote_inferior
);
6530 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6533 struct stop_reply
: public notif_event
6537 /* The identifier of the thread about this event */
6540 /* The remote state this event is associated with. When the remote
6541 connection, represented by a remote_state object, is closed,
6542 all the associated stop_reply events should be released. */
6543 struct remote_state
*rs
;
6545 struct target_waitstatus ws
;
6547 /* The architecture associated with the expedited registers. */
6550 /* Expedited registers. This makes remote debugging a bit more
6551 efficient for those targets that provide critical registers as
6552 part of their normal status mechanism (as another roundtrip to
6553 fetch them is avoided). */
6554 std::vector
<cached_reg_t
> regcache
;
6556 enum target_stop_reason stop_reason
;
6558 CORE_ADDR watch_data_address
;
6563 /* Class used to track the construction of a vCont packet in the
6564 outgoing packet buffer. This is used to send multiple vCont
6565 packets if we have more actions than would fit a single packet. */
6570 explicit vcont_builder (remote_target
*remote
)
6577 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6582 /* The remote target. */
6583 remote_target
*m_remote
;
6585 /* Pointer to the first action. P points here if no action has been
6587 char *m_first_action
;
6589 /* Where the next action will be appended. */
6592 /* The end of the buffer. Must never write past this. */
6596 /* Prepare the outgoing buffer for a new vCont packet. */
6599 vcont_builder::restart ()
6601 struct remote_state
*rs
= m_remote
->get_remote_state ();
6603 m_p
= rs
->buf
.data ();
6604 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6605 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6606 m_first_action
= m_p
;
6609 /* If the vCont packet being built has any action, send it to the
6613 vcont_builder::flush ()
6615 struct remote_state
*rs
;
6617 if (m_p
== m_first_action
)
6620 rs
= m_remote
->get_remote_state ();
6621 m_remote
->putpkt (rs
->buf
);
6622 m_remote
->getpkt (&rs
->buf
, 0);
6623 if (strcmp (rs
->buf
.data (), "OK") != 0)
6624 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6627 /* The largest action is range-stepping, with its two addresses. This
6628 is more than sufficient. If a new, bigger action is created, it'll
6629 quickly trigger a failed assertion in append_resumption (and we'll
6631 #define MAX_ACTION_SIZE 200
6633 /* Append a new vCont action in the outgoing packet being built. If
6634 the action doesn't fit the packet along with previous actions, push
6635 what we've got so far to the remote end and start over a new vCont
6636 packet (with the new action). */
6639 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6641 char buf
[MAX_ACTION_SIZE
+ 1];
6643 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6644 ptid
, step
, siggnal
);
6646 /* Check whether this new action would fit in the vCont packet along
6647 with previous actions. If not, send what we've got so far and
6648 start a new vCont packet. */
6649 size_t rsize
= endp
- buf
;
6650 if (rsize
> m_endp
- m_p
)
6655 /* Should now fit. */
6656 gdb_assert (rsize
<= m_endp
- m_p
);
6659 memcpy (m_p
, buf
, rsize
);
6664 /* to_commit_resume implementation. */
6667 remote_target::commit_resumed ()
6669 /* If connected in all-stop mode, we'd send the remote resume
6670 request directly from remote_resume. Likewise if
6671 reverse-debugging, as there are no defined vCont actions for
6672 reverse execution. */
6673 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6676 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6677 instead of resuming all threads of each process individually.
6678 However, if any thread of a process must remain halted, we can't
6679 send wildcard resumes and must send one action per thread.
6681 Care must be taken to not resume threads/processes the server
6682 side already told us are stopped, but the core doesn't know about
6683 yet, because the events are still in the vStopped notification
6686 #1 => vCont s:p1.1;c
6688 #3 <= %Stopped T05 p1.1
6693 #8 (infrun handles the stop for p1.1 and continues stepping)
6694 #9 => vCont s:p1.1;c
6696 The last vCont above would resume thread p1.2 by mistake, because
6697 the server has no idea that the event for p1.2 had not been
6700 The server side must similarly ignore resume actions for the
6701 thread that has a pending %Stopped notification (and any other
6702 threads with events pending), until GDB acks the notification
6703 with vStopped. Otherwise, e.g., the following case is
6706 #1 => g (or any other packet)
6708 #3 <= %Stopped T05 p1.2
6709 #4 => vCont s:p1.1;c
6712 Above, the server must not resume thread p1.2. GDB can't know
6713 that p1.2 stopped until it acks the %Stopped notification, and
6714 since from GDB's perspective all threads should be running, it
6717 Finally, special care must also be given to handling fork/vfork
6718 events. A (v)fork event actually tells us that two processes
6719 stopped -- the parent and the child. Until we follow the fork,
6720 we must not resume the child. Therefore, if we have a pending
6721 fork follow, we must not send a global wildcard resume action
6722 (vCont;c). We can still send process-wide wildcards though. */
6724 /* Start by assuming a global wildcard (vCont;c) is possible. */
6725 bool may_global_wildcard_vcont
= true;
6727 /* And assume every process is individually wildcard-able too. */
6728 for (inferior
*inf
: all_non_exited_inferiors (this))
6730 remote_inferior
*priv
= get_remote_inferior (inf
);
6732 priv
->may_wildcard_vcont
= true;
6735 /* Check for any pending events (not reported or processed yet) and
6736 disable process and global wildcard resumes appropriately. */
6737 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6739 bool any_pending_vcont_resume
= false;
6741 for (thread_info
*tp
: all_non_exited_threads (this))
6743 remote_thread_info
*priv
= get_remote_thread_info (tp
);
6745 /* If a thread of a process is not meant to be resumed, then we
6746 can't wildcard that process. */
6747 if (priv
->get_resume_state () == resume_state::NOT_RESUMED
)
6749 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6751 /* And if we can't wildcard a process, we can't wildcard
6752 everything either. */
6753 may_global_wildcard_vcont
= false;
6757 if (priv
->get_resume_state () == resume_state::RESUMED_PENDING_VCONT
)
6758 any_pending_vcont_resume
= true;
6760 /* If a thread is the parent of an unfollowed fork, then we
6761 can't do a global wildcard, as that would resume the fork
6763 if (is_pending_fork_parent_thread (tp
))
6764 may_global_wildcard_vcont
= false;
6767 /* We didn't have any resumed thread pending a vCont resume, so nothing to
6769 if (!any_pending_vcont_resume
)
6772 /* Now let's build the vCont packet(s). Actions must be appended
6773 from narrower to wider scopes (thread -> process -> global). If
6774 we end up with too many actions for a single packet vcont_builder
6775 flushes the current vCont packet to the remote side and starts a
6777 struct vcont_builder
vcont_builder (this);
6779 /* Threads first. */
6780 for (thread_info
*tp
: all_non_exited_threads (this))
6782 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6784 /* If the thread was previously vCont-resumed, no need to send a specific
6785 action for it. If we didn't receive a resume request for it, don't
6786 send an action for it either. */
6787 if (remote_thr
->get_resume_state () != resume_state::RESUMED_PENDING_VCONT
)
6790 gdb_assert (!thread_is_in_step_over_chain (tp
));
6792 /* We should never be commit-resuming a thread that has a stop reply.
6793 Otherwise, we would end up reporting a stop event for a thread while
6794 it is running on the remote target. */
6795 remote_state
*rs
= get_remote_state ();
6796 for (const auto &stop_reply
: rs
->stop_reply_queue
)
6797 gdb_assert (stop_reply
->ptid
!= tp
->ptid
);
6799 const resumed_pending_vcont_info
&info
6800 = remote_thr
->resumed_pending_vcont_info ();
6802 /* Check if we need to send a specific action for this thread. If not,
6803 it will be included in a wildcard resume instead. */
6804 if (info
.step
|| info
.sig
!= GDB_SIGNAL_0
6805 || !get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6806 vcont_builder
.push_action (tp
->ptid
, info
.step
, info
.sig
);
6808 remote_thr
->set_resumed ();
6811 /* Now check whether we can send any process-wide wildcard. This is
6812 to avoid sending a global wildcard in the case nothing is
6813 supposed to be resumed. */
6814 bool any_process_wildcard
= false;
6816 for (inferior
*inf
: all_non_exited_inferiors (this))
6818 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6820 any_process_wildcard
= true;
6825 if (any_process_wildcard
)
6827 /* If all processes are wildcard-able, then send a single "c"
6828 action, otherwise, send an "all (-1) threads of process"
6829 continue action for each running process, if any. */
6830 if (may_global_wildcard_vcont
)
6832 vcont_builder
.push_action (minus_one_ptid
,
6833 false, GDB_SIGNAL_0
);
6837 for (inferior
*inf
: all_non_exited_inferiors (this))
6839 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6841 vcont_builder
.push_action (ptid_t (inf
->pid
),
6842 false, GDB_SIGNAL_0
);
6848 vcont_builder
.flush ();
6851 /* Implementation of target_has_pending_events. */
6854 remote_target::has_pending_events ()
6856 if (target_can_async_p ())
6858 remote_state
*rs
= get_remote_state ();
6860 if (async_event_handler_marked (rs
->remote_async_inferior_event_token
))
6863 /* Note that BUFCNT can be negative, indicating sticky
6865 if (rs
->remote_desc
->bufcnt
!= 0)
6873 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6874 thread, all threads of a remote process, or all threads of all
6878 remote_target::remote_stop_ns (ptid_t ptid
)
6880 struct remote_state
*rs
= get_remote_state ();
6881 char *p
= rs
->buf
.data ();
6882 char *endp
= p
+ get_remote_packet_size ();
6884 /* If any thread that needs to stop was resumed but pending a vCont
6885 resume, generate a phony stop_reply. However, first check
6886 whether the thread wasn't resumed with a signal. Generating a
6887 phony stop in that case would result in losing the signal. */
6888 bool needs_commit
= false;
6889 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6891 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6893 if (remote_thr
->get_resume_state ()
6894 == resume_state::RESUMED_PENDING_VCONT
)
6896 const resumed_pending_vcont_info
&info
6897 = remote_thr
->resumed_pending_vcont_info ();
6898 if (info
.sig
!= GDB_SIGNAL_0
)
6900 /* This signal must be forwarded to the inferior. We
6901 could commit-resume just this thread, but its simpler
6902 to just commit-resume everything. */
6903 needs_commit
= true;
6912 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6914 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6916 if (remote_thr
->get_resume_state ()
6917 == resume_state::RESUMED_PENDING_VCONT
)
6919 remote_debug_printf ("Enqueueing phony stop reply for thread pending "
6920 "vCont-resume (%d, %ld, %ld)", tp
->ptid
.pid(),
6921 tp
->ptid
.lwp (), tp
->ptid
.tid ());
6923 /* Check that the thread wasn't resumed with a signal.
6924 Generating a phony stop would result in losing the
6926 const resumed_pending_vcont_info
&info
6927 = remote_thr
->resumed_pending_vcont_info ();
6928 gdb_assert (info
.sig
== GDB_SIGNAL_0
);
6930 stop_reply
*sr
= new stop_reply ();
6931 sr
->ptid
= tp
->ptid
;
6933 sr
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
6934 sr
->ws
.value
.sig
= GDB_SIGNAL_0
;
6935 sr
->arch
= tp
->inf
->gdbarch
;
6936 sr
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6937 sr
->watch_data_address
= 0;
6939 this->push_stop_reply (sr
);
6941 /* Pretend that this thread was actually resumed on the
6942 remote target, then stopped. If we leave it in the
6943 RESUMED_PENDING_VCONT state and the commit_resumed
6944 method is called while the stop reply is still in the
6945 queue, we'll end up reporting a stop event to the core
6946 for that thread while it is running on the remote
6947 target... that would be bad. */
6948 remote_thr
->set_resumed ();
6952 /* FIXME: This supports_vCont_probed check is a workaround until
6953 packet_support is per-connection. */
6954 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6955 || !rs
->supports_vCont_probed
)
6956 remote_vcont_probe ();
6958 if (!rs
->supports_vCont
.t
)
6959 error (_("Remote server does not support stopping threads"));
6961 if (ptid
== minus_one_ptid
6962 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6963 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6968 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6971 /* All (-1) threads of process. */
6972 nptid
= ptid_t (ptid
.pid (), -1, 0);
6975 /* Small optimization: if we already have a stop reply for
6976 this thread, no use in telling the stub we want this
6978 if (peek_stop_reply (ptid
))
6984 write_ptid (p
, endp
, nptid
);
6987 /* In non-stop, we get an immediate OK reply. The stop reply will
6988 come in asynchronously by notification. */
6990 getpkt (&rs
->buf
, 0);
6991 if (strcmp (rs
->buf
.data (), "OK") != 0)
6992 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6996 /* All-stop version of target_interrupt. Sends a break or a ^C to
6997 interrupt the remote target. It is undefined which thread of which
6998 process reports the interrupt. */
7001 remote_target::remote_interrupt_as ()
7003 struct remote_state
*rs
= get_remote_state ();
7005 rs
->ctrlc_pending_p
= 1;
7007 /* If the inferior is stopped already, but the core didn't know
7008 about it yet, just ignore the request. The cached wait status
7009 will be collected in remote_wait. */
7010 if (rs
->cached_wait_status
)
7013 /* Send interrupt_sequence to remote target. */
7014 send_interrupt_sequence ();
7017 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
7018 the remote target. It is undefined which thread of which process
7019 reports the interrupt. Throws an error if the packet is not
7020 supported by the server. */
7023 remote_target::remote_interrupt_ns ()
7025 struct remote_state
*rs
= get_remote_state ();
7026 char *p
= rs
->buf
.data ();
7027 char *endp
= p
+ get_remote_packet_size ();
7029 xsnprintf (p
, endp
- p
, "vCtrlC");
7031 /* In non-stop, we get an immediate OK reply. The stop reply will
7032 come in asynchronously by notification. */
7034 getpkt (&rs
->buf
, 0);
7036 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
7040 case PACKET_UNKNOWN
:
7041 error (_("No support for interrupting the remote target."));
7043 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
7047 /* Implement the to_stop function for the remote targets. */
7050 remote_target::stop (ptid_t ptid
)
7052 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7054 if (target_is_non_stop_p ())
7055 remote_stop_ns (ptid
);
7058 /* We don't currently have a way to transparently pause the
7059 remote target in all-stop mode. Interrupt it instead. */
7060 remote_interrupt_as ();
7064 /* Implement the to_interrupt function for the remote targets. */
7067 remote_target::interrupt ()
7069 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7071 if (target_is_non_stop_p ())
7072 remote_interrupt_ns ();
7074 remote_interrupt_as ();
7077 /* Implement the to_pass_ctrlc function for the remote targets. */
7080 remote_target::pass_ctrlc ()
7082 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7084 struct remote_state
*rs
= get_remote_state ();
7086 /* If we're starting up, we're not fully synced yet. Quit
7088 if (rs
->starting_up
)
7090 /* If ^C has already been sent once, offer to disconnect. */
7091 else if (rs
->ctrlc_pending_p
)
7094 target_interrupt ();
7097 /* Ask the user what to do when an interrupt is received. */
7100 remote_target::interrupt_query ()
7102 struct remote_state
*rs
= get_remote_state ();
7104 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
7106 if (query (_("The target is not responding to interrupt requests.\n"
7107 "Stop debugging it? ")))
7109 remote_unpush_target (this);
7110 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
7115 if (query (_("Interrupted while waiting for the program.\n"
7116 "Give up waiting? ")))
7121 /* Enable/disable target terminal ownership. Most targets can use
7122 terminal groups to control terminal ownership. Remote targets are
7123 different in that explicit transfer of ownership to/from GDB/target
7127 remote_target::terminal_inferior ()
7129 /* NOTE: At this point we could also register our selves as the
7130 recipient of all input. Any characters typed could then be
7131 passed on down to the target. */
7135 remote_target::terminal_ours ()
7140 remote_console_output (const char *msg
)
7144 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
7147 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
7151 gdb_stdtarg
->puts (tb
);
7153 gdb_stdtarg
->flush ();
7156 /* Return the length of the stop reply queue. */
7159 remote_target::stop_reply_queue_length ()
7161 remote_state
*rs
= get_remote_state ();
7162 return rs
->stop_reply_queue
.size ();
7166 remote_notif_stop_parse (remote_target
*remote
,
7167 struct notif_client
*self
, const char *buf
,
7168 struct notif_event
*event
)
7170 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
7174 remote_notif_stop_ack (remote_target
*remote
,
7175 struct notif_client
*self
, const char *buf
,
7176 struct notif_event
*event
)
7178 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
7181 putpkt (remote
, self
->ack_command
);
7183 /* Kind can be TARGET_WAITKIND_IGNORE if we have meanwhile discarded
7184 the notification. It was left in the queue because we need to
7185 acknowledge it and pull the rest of the notifications out. */
7186 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7187 remote
->push_stop_reply (stop_reply
);
7191 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
7192 struct notif_client
*self
)
7194 /* We can't get pending events in remote_notif_process for
7195 notification stop, and we have to do this in remote_wait_ns
7196 instead. If we fetch all queued events from stub, remote stub
7197 may exit and we have no chance to process them back in
7199 remote_state
*rs
= remote
->get_remote_state ();
7200 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7204 stop_reply::~stop_reply ()
7206 for (cached_reg_t
®
: regcache
)
7210 static notif_event_up
7211 remote_notif_stop_alloc_reply ()
7213 return notif_event_up (new struct stop_reply ());
7216 /* A client of notification Stop. */
7218 struct notif_client notif_client_stop
=
7222 remote_notif_stop_parse
,
7223 remote_notif_stop_ack
,
7224 remote_notif_stop_can_get_pending_events
,
7225 remote_notif_stop_alloc_reply
,
7229 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
7230 the pid of the process that owns the threads we want to check, or
7231 -1 if we want to check all threads. */
7234 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
7237 if (ws
->kind
== TARGET_WAITKIND_FORKED
7238 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
7240 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
7247 /* Return the thread's pending status used to determine whether the
7248 thread is a fork parent stopped at a fork event. */
7250 static struct target_waitstatus
*
7251 thread_pending_fork_status (struct thread_info
*thread
)
7253 if (thread
->suspend
.waitstatus_pending_p
)
7254 return &thread
->suspend
.waitstatus
;
7256 return &thread
->pending_follow
;
7259 /* Determine if THREAD is a pending fork parent thread. */
7262 is_pending_fork_parent_thread (struct thread_info
*thread
)
7264 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7267 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7270 /* If CONTEXT contains any fork child threads that have not been
7271 reported yet, remove them from the CONTEXT list. If such a
7272 thread exists it is because we are stopped at a fork catchpoint
7273 and have not yet called follow_fork, which will set up the
7274 host-side data structures for the new process. */
7277 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7280 struct notif_client
*notif
= ¬if_client_stop
;
7282 /* For any threads stopped at a fork event, remove the corresponding
7283 fork child threads from the CONTEXT list. */
7284 for (thread_info
*thread
: all_non_exited_threads (this))
7286 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7288 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7289 context
->remove_thread (ws
->value
.related_pid
);
7292 /* Check for any pending fork events (not reported or processed yet)
7293 in process PID and remove those fork child threads from the
7294 CONTEXT list as well. */
7295 remote_notif_get_pending_events (notif
);
7296 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7297 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7298 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7299 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7300 context
->remove_thread (event
->ws
.value
.related_pid
);
7303 /* Check whether any event pending in the vStopped queue would prevent a
7304 global or process wildcard vCont action. Set *may_global_wildcard to
7305 false if we can't do a global wildcard (vCont;c), and clear the event
7306 inferior's may_wildcard_vcont flag if we can't do a process-wide
7307 wildcard resume (vCont;c:pPID.-1). */
7310 remote_target::check_pending_events_prevent_wildcard_vcont
7311 (bool *may_global_wildcard
)
7313 struct notif_client
*notif
= ¬if_client_stop
;
7315 remote_notif_get_pending_events (notif
);
7316 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7318 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7319 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7322 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7323 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7324 *may_global_wildcard
= false;
7326 /* This may be the first time we heard about this process.
7327 Regardless, we must not do a global wildcard resume, otherwise
7328 we'd resume this process too. */
7329 *may_global_wildcard
= false;
7330 if (event
->ptid
!= null_ptid
)
7332 inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7334 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7339 /* Discard all pending stop replies of inferior INF. */
7342 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7344 struct stop_reply
*reply
;
7345 struct remote_state
*rs
= get_remote_state ();
7346 struct remote_notif_state
*rns
= rs
->notif_state
;
7348 /* This function can be notified when an inferior exists. When the
7349 target is not remote, the notification state is NULL. */
7350 if (rs
->remote_desc
== NULL
)
7353 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7355 /* Discard the in-flight notification. */
7356 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7358 /* Leave the notification pending, since the server expects that
7359 we acknowledge it with vStopped. But clear its contents, so
7360 that later on when we acknowledge it, we also discard it. */
7361 reply
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7364 fprintf_unfiltered (gdb_stdlog
,
7365 "discarded in-flight notification\n");
7368 /* Discard the stop replies we have already pulled with
7370 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7371 rs
->stop_reply_queue
.end (),
7372 [=] (const stop_reply_up
&event
)
7374 return event
->ptid
.pid () == inf
->pid
;
7376 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7379 /* Discard the stop replies for RS in stop_reply_queue. */
7382 remote_target::discard_pending_stop_replies_in_queue ()
7384 remote_state
*rs
= get_remote_state ();
7386 /* Discard the stop replies we have already pulled with
7388 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7389 rs
->stop_reply_queue
.end (),
7390 [=] (const stop_reply_up
&event
)
7392 return event
->rs
== rs
;
7394 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7397 /* Remove the first reply in 'stop_reply_queue' which matches
7401 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7403 remote_state
*rs
= get_remote_state ();
7405 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7406 rs
->stop_reply_queue
.end (),
7407 [=] (const stop_reply_up
&event
)
7409 return event
->ptid
.matches (ptid
);
7411 struct stop_reply
*result
;
7412 if (iter
== rs
->stop_reply_queue
.end ())
7416 result
= iter
->release ();
7417 rs
->stop_reply_queue
.erase (iter
);
7421 fprintf_unfiltered (gdb_stdlog
,
7422 "notif: discard queued event: 'Stop' in %s\n",
7423 target_pid_to_str (ptid
).c_str ());
7428 /* Look for a queued stop reply belonging to PTID. If one is found,
7429 remove it from the queue, and return it. Returns NULL if none is
7430 found. If there are still queued events left to process, tell the
7431 event loop to get back to target_wait soon. */
7434 remote_target::queued_stop_reply (ptid_t ptid
)
7436 remote_state
*rs
= get_remote_state ();
7437 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7439 if (!rs
->stop_reply_queue
.empty ())
7441 /* There's still at least an event left. */
7442 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7448 /* Push a fully parsed stop reply in the stop reply queue. Since we
7449 know that we now have at least one queued event left to pass to the
7450 core side, tell the event loop to get back to target_wait soon. */
7453 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7455 remote_state
*rs
= get_remote_state ();
7456 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7459 fprintf_unfiltered (gdb_stdlog
,
7460 "notif: push 'Stop' %s to queue %d\n",
7461 target_pid_to_str (new_event
->ptid
).c_str (),
7462 int (rs
->stop_reply_queue
.size ()));
7464 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7467 /* Returns true if we have a stop reply for PTID. */
7470 remote_target::peek_stop_reply (ptid_t ptid
)
7472 remote_state
*rs
= get_remote_state ();
7473 for (auto &event
: rs
->stop_reply_queue
)
7474 if (ptid
== event
->ptid
7475 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7480 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7481 starting with P and ending with PEND matches PREFIX. */
7484 strprefix (const char *p
, const char *pend
, const char *prefix
)
7486 for ( ; p
< pend
; p
++, prefix
++)
7489 return *prefix
== '\0';
7492 /* Parse the stop reply in BUF. Either the function succeeds, and the
7493 result is stored in EVENT, or throws an error. */
7496 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7498 remote_arch_state
*rsa
= NULL
;
7503 event
->ptid
= null_ptid
;
7504 event
->rs
= get_remote_state ();
7505 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7506 event
->ws
.value
.integer
= 0;
7507 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7508 event
->regcache
.clear ();
7513 case 'T': /* Status with PC, SP, FP, ... */
7514 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7515 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7517 n... = register number
7518 r... = register contents
7521 p
= &buf
[3]; /* after Txx */
7527 p1
= strchr (p
, ':');
7529 error (_("Malformed packet(a) (missing colon): %s\n\
7533 error (_("Malformed packet(a) (missing register number): %s\n\
7537 /* Some "registers" are actually extended stop information.
7538 Note if you're adding a new entry here: GDB 7.9 and
7539 earlier assume that all register "numbers" that start
7540 with an hex digit are real register numbers. Make sure
7541 the server only sends such a packet if it knows the
7542 client understands it. */
7544 if (strprefix (p
, p1
, "thread"))
7545 event
->ptid
= read_ptid (++p1
, &p
);
7546 else if (strprefix (p
, p1
, "syscall_entry"))
7550 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7551 p
= unpack_varlen_hex (++p1
, &sysno
);
7552 event
->ws
.value
.syscall_number
= (int) sysno
;
7554 else if (strprefix (p
, p1
, "syscall_return"))
7558 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7559 p
= unpack_varlen_hex (++p1
, &sysno
);
7560 event
->ws
.value
.syscall_number
= (int) sysno
;
7562 else if (strprefix (p
, p1
, "watch")
7563 || strprefix (p
, p1
, "rwatch")
7564 || strprefix (p
, p1
, "awatch"))
7566 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7567 p
= unpack_varlen_hex (++p1
, &addr
);
7568 event
->watch_data_address
= (CORE_ADDR
) addr
;
7570 else if (strprefix (p
, p1
, "swbreak"))
7572 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7574 /* Make sure the stub doesn't forget to indicate support
7576 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7577 error (_("Unexpected swbreak stop reason"));
7579 /* The value part is documented as "must be empty",
7580 though we ignore it, in case we ever decide to make
7581 use of it in a backward compatible way. */
7582 p
= strchrnul (p1
+ 1, ';');
7584 else if (strprefix (p
, p1
, "hwbreak"))
7586 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7588 /* Make sure the stub doesn't forget to indicate support
7590 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7591 error (_("Unexpected hwbreak stop reason"));
7594 p
= strchrnul (p1
+ 1, ';');
7596 else if (strprefix (p
, p1
, "library"))
7598 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7599 p
= strchrnul (p1
+ 1, ';');
7601 else if (strprefix (p
, p1
, "replaylog"))
7603 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7604 /* p1 will indicate "begin" or "end", but it makes
7605 no difference for now, so ignore it. */
7606 p
= strchrnul (p1
+ 1, ';');
7608 else if (strprefix (p
, p1
, "core"))
7612 p
= unpack_varlen_hex (++p1
, &c
);
7615 else if (strprefix (p
, p1
, "fork"))
7617 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7618 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7620 else if (strprefix (p
, p1
, "vfork"))
7622 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7623 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7625 else if (strprefix (p
, p1
, "vforkdone"))
7627 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7628 p
= strchrnul (p1
+ 1, ';');
7630 else if (strprefix (p
, p1
, "exec"))
7635 /* Determine the length of the execd pathname. */
7636 p
= unpack_varlen_hex (++p1
, &ignored
);
7637 pathlen
= (p
- p1
) / 2;
7639 /* Save the pathname for event reporting and for
7640 the next run command. */
7641 gdb::unique_xmalloc_ptr
<char[]> pathname
7642 ((char *) xmalloc (pathlen
+ 1));
7643 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7644 pathname
[pathlen
] = '\0';
7646 /* This is freed during event handling. */
7647 event
->ws
.value
.execd_pathname
= pathname
.release ();
7648 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7650 /* Skip the registers included in this packet, since
7651 they may be for an architecture different from the
7652 one used by the original program. */
7655 else if (strprefix (p
, p1
, "create"))
7657 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7658 p
= strchrnul (p1
+ 1, ';');
7667 p
= strchrnul (p1
+ 1, ';');
7672 /* Maybe a real ``P'' register number. */
7673 p_temp
= unpack_varlen_hex (p
, &pnum
);
7674 /* If the first invalid character is the colon, we got a
7675 register number. Otherwise, it's an unknown stop
7679 /* If we haven't parsed the event's thread yet, find
7680 it now, in order to find the architecture of the
7681 reported expedited registers. */
7682 if (event
->ptid
== null_ptid
)
7684 /* If there is no thread-id information then leave
7685 the event->ptid as null_ptid. Later in
7686 process_stop_reply we will pick a suitable
7688 const char *thr
= strstr (p1
+ 1, ";thread:");
7690 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7697 = (event
->ptid
== null_ptid
7699 : find_inferior_ptid (this, event
->ptid
));
7700 /* If this is the first time we learn anything
7701 about this process, skip the registers
7702 included in this packet, since we don't yet
7703 know which architecture to use to parse them.
7704 We'll determine the architecture later when
7705 we process the stop reply and retrieve the
7706 target description, via
7707 remote_notice_new_inferior ->
7708 post_create_inferior. */
7711 p
= strchrnul (p1
+ 1, ';');
7716 event
->arch
= inf
->gdbarch
;
7717 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7721 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7722 cached_reg_t cached_reg
;
7725 error (_("Remote sent bad register number %s: %s\n\
7727 hex_string (pnum
), p
, buf
);
7729 cached_reg
.num
= reg
->regnum
;
7730 cached_reg
.data
= (gdb_byte
*)
7731 xmalloc (register_size (event
->arch
, reg
->regnum
));
7734 fieldsize
= hex2bin (p
, cached_reg
.data
,
7735 register_size (event
->arch
, reg
->regnum
));
7737 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7738 warning (_("Remote reply is too short: %s"), buf
);
7740 event
->regcache
.push_back (cached_reg
);
7744 /* Not a number. Silently skip unknown optional
7746 p
= strchrnul (p1
+ 1, ';');
7751 error (_("Remote register badly formatted: %s\nhere: %s"),
7756 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7760 case 'S': /* Old style status, just signal only. */
7764 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7765 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7766 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7767 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7769 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7772 case 'w': /* Thread exited. */
7776 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7777 p
= unpack_varlen_hex (&buf
[1], &value
);
7778 event
->ws
.value
.integer
= value
;
7780 error (_("stop reply packet badly formatted: %s"), buf
);
7781 event
->ptid
= read_ptid (++p
, NULL
);
7784 case 'W': /* Target exited. */
7789 /* GDB used to accept only 2 hex chars here. Stubs should
7790 only send more if they detect GDB supports multi-process
7792 p
= unpack_varlen_hex (&buf
[1], &value
);
7796 /* The remote process exited. */
7797 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7798 event
->ws
.value
.integer
= value
;
7802 /* The remote process exited with a signal. */
7803 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7804 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7805 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7807 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7810 /* If no process is specified, return null_ptid, and let the
7811 caller figure out the right process to use. */
7821 else if (startswith (p
, "process:"))
7825 p
+= sizeof ("process:") - 1;
7826 unpack_varlen_hex (p
, &upid
);
7830 error (_("unknown stop reply packet: %s"), buf
);
7833 error (_("unknown stop reply packet: %s"), buf
);
7834 event
->ptid
= ptid_t (pid
);
7838 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7839 event
->ptid
= minus_one_ptid
;
7844 /* When the stub wants to tell GDB about a new notification reply, it
7845 sends a notification (%Stop, for example). Those can come it at
7846 any time, hence, we have to make sure that any pending
7847 putpkt/getpkt sequence we're making is finished, before querying
7848 the stub for more events with the corresponding ack command
7849 (vStopped, for example). E.g., if we started a vStopped sequence
7850 immediately upon receiving the notification, something like this
7858 1.6) <-- (registers reply to step #1.3)
7860 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7863 To solve this, whenever we parse a %Stop notification successfully,
7864 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7865 doing whatever we were doing:
7871 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7872 2.5) <-- (registers reply to step #2.3)
7874 Eventually after step #2.5, we return to the event loop, which
7875 notices there's an event on the
7876 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7877 associated callback --- the function below. At this point, we're
7878 always safe to start a vStopped sequence. :
7881 2.7) <-- T05 thread:2
7887 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7889 struct remote_state
*rs
= get_remote_state ();
7891 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7894 fprintf_unfiltered (gdb_stdlog
,
7895 "notif: process: '%s' ack pending event\n",
7899 nc
->ack (this, nc
, rs
->buf
.data (),
7900 rs
->notif_state
->pending_event
[nc
->id
]);
7901 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7905 getpkt (&rs
->buf
, 0);
7906 if (strcmp (rs
->buf
.data (), "OK") == 0)
7909 remote_notif_ack (this, nc
, rs
->buf
.data ());
7915 fprintf_unfiltered (gdb_stdlog
,
7916 "notif: process: '%s' no pending reply\n",
7921 /* Wrapper around remote_target::remote_notif_get_pending_events to
7922 avoid having to export the whole remote_target class. */
7925 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7927 remote
->remote_notif_get_pending_events (nc
);
7930 /* Called from process_stop_reply when the stop packet we are responding
7931 to didn't include a process-id or thread-id. STATUS is the stop event
7932 we are responding to.
7934 It is the task of this function to select a suitable thread (or process)
7935 and return its ptid, this is the thread (or process) we will assume the
7936 stop event came from.
7938 In some cases there isn't really any choice about which thread (or
7939 process) is selected, a basic remote with a single process containing a
7940 single thread might choose not to send any process-id or thread-id in
7941 its stop packets, this function will select and return the one and only
7944 However, if a target supports multiple threads (or processes) and still
7945 doesn't include a thread-id (or process-id) in its stop packet then
7946 first, this is a badly behaving target, and second, we're going to have
7947 to select a thread (or process) at random and use that. This function
7948 will print a warning to the user if it detects that there is the
7949 possibility that GDB is guessing which thread (or process) to
7952 Note that this is called before GDB fetches the updated thread list from the
7953 target. So it's possible for the stop reply to be ambiguous and for GDB to
7954 not realize it. For example, if there's initially one thread, the target
7955 spawns a second thread, and then sends a stop reply without an id that
7956 concerns the first thread. GDB will assume the stop reply is about the
7957 first thread - the only thread it knows about - without printing a warning.
7958 Anyway, if the remote meant for the stop reply to be about the second thread,
7959 then it would be really broken, because GDB doesn't know about that thread
7963 remote_target::select_thread_for_ambiguous_stop_reply
7964 (const struct target_waitstatus
*status
)
7966 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
7968 /* Some stop events apply to all threads in an inferior, while others
7969 only apply to a single thread. */
7970 bool process_wide_stop
7971 = (status
->kind
== TARGET_WAITKIND_EXITED
7972 || status
->kind
== TARGET_WAITKIND_SIGNALLED
);
7974 remote_debug_printf ("process_wide_stop = %d", process_wide_stop
);
7976 thread_info
*first_resumed_thread
= nullptr;
7977 bool ambiguous
= false;
7979 /* Consider all non-exited threads of the target, find the first resumed
7981 for (thread_info
*thr
: all_non_exited_threads (this))
7983 remote_thread_info
*remote_thr
= get_remote_thread_info (thr
);
7985 if (remote_thr
->get_resume_state () != resume_state::RESUMED
)
7988 if (first_resumed_thread
== nullptr)
7989 first_resumed_thread
= thr
;
7990 else if (!process_wide_stop
7991 || first_resumed_thread
->ptid
.pid () != thr
->ptid
.pid ())
7995 remote_debug_printf ("first resumed thread is %s",
7996 pid_to_str (first_resumed_thread
->ptid
).c_str ());
7997 remote_debug_printf ("is this guess ambiguous? = %d", ambiguous
);
7999 gdb_assert (first_resumed_thread
!= nullptr);
8001 /* Warn if the remote target is sending ambiguous stop replies. */
8004 static bool warned
= false;
8008 /* If you are seeing this warning then the remote target has
8009 stopped without specifying a thread-id, but the target
8010 does have multiple threads (or inferiors), and so GDB is
8011 having to guess which thread stopped.
8013 Examples of what might cause this are the target sending
8014 and 'S' stop packet, or a 'T' stop packet and not
8015 including a thread-id.
8017 Additionally, the target might send a 'W' or 'X packet
8018 without including a process-id, when the target has
8019 multiple running inferiors. */
8020 if (process_wide_stop
)
8021 warning (_("multi-inferior target stopped without "
8022 "sending a process-id, using first "
8023 "non-exited inferior"));
8025 warning (_("multi-threaded target stopped without "
8026 "sending a thread-id, using first "
8027 "non-exited thread"));
8032 /* If this is a stop for all threads then don't use a particular threads
8033 ptid, instead create a new ptid where only the pid field is set. */
8034 if (process_wide_stop
)
8035 return ptid_t (first_resumed_thread
->ptid
.pid ());
8037 return first_resumed_thread
->ptid
;
8040 /* Called when it is decided that STOP_REPLY holds the info of the
8041 event that is to be returned to the core. This function always
8042 destroys STOP_REPLY. */
8045 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
8046 struct target_waitstatus
*status
)
8048 *status
= stop_reply
->ws
;
8049 ptid_t ptid
= stop_reply
->ptid
;
8051 /* If no thread/process was reported by the stub then select a suitable
8053 if (ptid
== null_ptid
)
8054 ptid
= select_thread_for_ambiguous_stop_reply (status
);
8055 gdb_assert (ptid
!= null_ptid
);
8057 if (status
->kind
!= TARGET_WAITKIND_EXITED
8058 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
8059 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
8061 /* Expedited registers. */
8062 if (!stop_reply
->regcache
.empty ())
8064 struct regcache
*regcache
8065 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
8067 for (cached_reg_t
®
: stop_reply
->regcache
)
8069 regcache
->raw_supply (reg
.num
, reg
.data
);
8073 stop_reply
->regcache
.clear ();
8076 remote_notice_new_inferior (ptid
, false);
8077 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
8078 remote_thr
->core
= stop_reply
->core
;
8079 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
8080 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
8082 if (target_is_non_stop_p ())
8084 /* If the target works in non-stop mode, a stop-reply indicates that
8085 only this thread stopped. */
8086 remote_thr
->set_not_resumed ();
8090 /* If the target works in all-stop mode, a stop-reply indicates that
8091 all the target's threads stopped. */
8092 for (thread_info
*tp
: all_non_exited_threads (this))
8093 get_remote_thread_info (tp
)->set_not_resumed ();
8101 /* The non-stop mode version of target_wait. */
8104 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
8105 target_wait_flags options
)
8107 struct remote_state
*rs
= get_remote_state ();
8108 struct stop_reply
*stop_reply
;
8112 /* If in non-stop mode, get out of getpkt even if a
8113 notification is received. */
8115 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
8118 if (ret
!= -1 && !is_notif
)
8121 case 'E': /* Error of some sort. */
8122 /* We're out of sync with the target now. Did it continue
8123 or not? We can't tell which thread it was in non-stop,
8124 so just ignore this. */
8125 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
8127 case 'O': /* Console output. */
8128 remote_console_output (&rs
->buf
[1]);
8131 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
8135 /* Acknowledge a pending stop reply that may have arrived in the
8137 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
8138 remote_notif_get_pending_events (¬if_client_stop
);
8140 /* If indeed we noticed a stop reply, we're done. */
8141 stop_reply
= queued_stop_reply (ptid
);
8142 if (stop_reply
!= NULL
)
8143 return process_stop_reply (stop_reply
, status
);
8145 /* Still no event. If we're just polling for an event, then
8146 return to the event loop. */
8147 if (options
& TARGET_WNOHANG
)
8149 status
->kind
= TARGET_WAITKIND_IGNORE
;
8150 return minus_one_ptid
;
8153 /* Otherwise do a blocking wait. */
8154 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
8158 /* Return the first resumed thread. */
8161 first_remote_resumed_thread (remote_target
*target
)
8163 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
8169 /* Wait until the remote machine stops, then return, storing status in
8170 STATUS just as `wait' would. */
8173 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
,
8174 target_wait_flags options
)
8176 struct remote_state
*rs
= get_remote_state ();
8177 ptid_t event_ptid
= null_ptid
;
8179 struct stop_reply
*stop_reply
;
8183 status
->kind
= TARGET_WAITKIND_IGNORE
;
8184 status
->value
.integer
= 0;
8186 stop_reply
= queued_stop_reply (ptid
);
8187 if (stop_reply
!= NULL
)
8188 return process_stop_reply (stop_reply
, status
);
8190 if (rs
->cached_wait_status
)
8191 /* Use the cached wait status, but only once. */
8192 rs
->cached_wait_status
= 0;
8197 int forever
= ((options
& TARGET_WNOHANG
) == 0
8198 && rs
->wait_forever_enabled_p
);
8200 if (!rs
->waiting_for_stop_reply
)
8202 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
8203 return minus_one_ptid
;
8206 /* FIXME: cagney/1999-09-27: If we're in async mode we should
8207 _never_ wait for ever -> test on target_is_async_p().
8208 However, before we do that we need to ensure that the caller
8209 knows how to take the target into/out of async mode. */
8210 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
8212 /* GDB gets a notification. Return to core as this event is
8214 if (ret
!= -1 && is_notif
)
8215 return minus_one_ptid
;
8217 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
8218 return minus_one_ptid
;
8221 buf
= rs
->buf
.data ();
8223 /* Assume that the target has acknowledged Ctrl-C unless we receive
8224 an 'F' or 'O' packet. */
8225 if (buf
[0] != 'F' && buf
[0] != 'O')
8226 rs
->ctrlc_pending_p
= 0;
8230 case 'E': /* Error of some sort. */
8231 /* We're out of sync with the target now. Did it continue or
8232 not? Not is more likely, so report a stop. */
8233 rs
->waiting_for_stop_reply
= 0;
8235 warning (_("Remote failure reply: %s"), buf
);
8236 status
->kind
= TARGET_WAITKIND_STOPPED
;
8237 status
->value
.sig
= GDB_SIGNAL_0
;
8239 case 'F': /* File-I/O request. */
8240 /* GDB may access the inferior memory while handling the File-I/O
8241 request, but we don't want GDB accessing memory while waiting
8242 for a stop reply. See the comments in putpkt_binary. Set
8243 waiting_for_stop_reply to 0 temporarily. */
8244 rs
->waiting_for_stop_reply
= 0;
8245 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
8246 rs
->ctrlc_pending_p
= 0;
8247 /* GDB handled the File-I/O request, and the target is running
8248 again. Keep waiting for events. */
8249 rs
->waiting_for_stop_reply
= 1;
8251 case 'N': case 'T': case 'S': case 'X': case 'W':
8253 /* There is a stop reply to handle. */
8254 rs
->waiting_for_stop_reply
= 0;
8257 = (struct stop_reply
*) remote_notif_parse (this,
8261 event_ptid
= process_stop_reply (stop_reply
, status
);
8264 case 'O': /* Console output. */
8265 remote_console_output (buf
+ 1);
8268 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
8270 /* Zero length reply means that we tried 'S' or 'C' and the
8271 remote system doesn't support it. */
8272 target_terminal::ours_for_output ();
8274 ("Can't send signals to this remote system. %s not sent.\n",
8275 gdb_signal_to_name (rs
->last_sent_signal
));
8276 rs
->last_sent_signal
= GDB_SIGNAL_0
;
8277 target_terminal::inferior ();
8279 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
8285 warning (_("Invalid remote reply: %s"), buf
);
8289 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
8290 return minus_one_ptid
;
8291 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
8293 /* Nothing interesting happened. If we're doing a non-blocking
8294 poll, we're done. Otherwise, go back to waiting. */
8295 if (options
& TARGET_WNOHANG
)
8296 return minus_one_ptid
;
8300 else if (status
->kind
!= TARGET_WAITKIND_EXITED
8301 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
8303 if (event_ptid
!= null_ptid
)
8304 record_currthread (rs
, event_ptid
);
8306 event_ptid
= first_remote_resumed_thread (this);
8310 /* A process exit. Invalidate our notion of current thread. */
8311 record_currthread (rs
, minus_one_ptid
);
8312 /* It's possible that the packet did not include a pid. */
8313 if (event_ptid
== null_ptid
)
8314 event_ptid
= first_remote_resumed_thread (this);
8315 /* EVENT_PTID could still be NULL_PTID. Double-check. */
8316 if (event_ptid
== null_ptid
)
8317 event_ptid
= magic_null_ptid
;
8323 /* Wait until the remote machine stops, then return, storing status in
8324 STATUS just as `wait' would. */
8327 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
,
8328 target_wait_flags options
)
8330 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
8332 remote_state
*rs
= get_remote_state ();
8334 /* Start by clearing the flag that asks for our wait method to be called,
8335 we'll mark it again at the end if needed. */
8336 if (target_is_async_p ())
8337 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
8341 if (target_is_non_stop_p ())
8342 event_ptid
= wait_ns (ptid
, status
, options
);
8344 event_ptid
= wait_as (ptid
, status
, options
);
8346 if (target_is_async_p ())
8348 /* If there are events left in the queue, or unacknowledged
8349 notifications, then tell the event loop to call us again. */
8350 if (!rs
->stop_reply_queue
.empty ()
8351 || rs
->notif_state
->pending_event
[notif_client_stop
.id
] != nullptr)
8352 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
8358 /* Fetch a single register using a 'p' packet. */
8361 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8364 struct gdbarch
*gdbarch
= regcache
->arch ();
8365 struct remote_state
*rs
= get_remote_state ();
8367 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8370 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8373 if (reg
->pnum
== -1)
8376 p
= rs
->buf
.data ();
8378 p
+= hexnumstr (p
, reg
->pnum
);
8381 getpkt (&rs
->buf
, 0);
8383 buf
= rs
->buf
.data ();
8385 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8389 case PACKET_UNKNOWN
:
8392 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8393 gdbarch_register_name (regcache
->arch (),
8398 /* If this register is unfetchable, tell the regcache. */
8401 regcache
->raw_supply (reg
->regnum
, NULL
);
8405 /* Otherwise, parse and supply the value. */
8411 error (_("fetch_register_using_p: early buf termination"));
8413 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8416 regcache
->raw_supply (reg
->regnum
, regp
);
8420 /* Fetch the registers included in the target's 'g' packet. */
8423 remote_target::send_g_packet ()
8425 struct remote_state
*rs
= get_remote_state ();
8428 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8430 getpkt (&rs
->buf
, 0);
8431 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8432 error (_("Could not read registers; remote failure reply '%s'"),
8435 /* We can get out of synch in various cases. If the first character
8436 in the buffer is not a hex character, assume that has happened
8437 and try to fetch another packet to read. */
8438 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8439 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8440 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8441 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8443 remote_debug_printf ("Bad register packet; fetching a new packet");
8444 getpkt (&rs
->buf
, 0);
8447 buf_len
= strlen (rs
->buf
.data ());
8449 /* Sanity check the received packet. */
8450 if (buf_len
% 2 != 0)
8451 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8457 remote_target::process_g_packet (struct regcache
*regcache
)
8459 struct gdbarch
*gdbarch
= regcache
->arch ();
8460 struct remote_state
*rs
= get_remote_state ();
8461 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8466 buf_len
= strlen (rs
->buf
.data ());
8468 /* Further sanity checks, with knowledge of the architecture. */
8469 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8470 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8472 rsa
->sizeof_g_packet
, buf_len
/ 2,
8475 /* Save the size of the packet sent to us by the target. It is used
8476 as a heuristic when determining the max size of packets that the
8477 target can safely receive. */
8478 if (rsa
->actual_register_packet_size
== 0)
8479 rsa
->actual_register_packet_size
= buf_len
;
8481 /* If this is smaller than we guessed the 'g' packet would be,
8482 update our records. A 'g' reply that doesn't include a register's
8483 value implies either that the register is not available, or that
8484 the 'p' packet must be used. */
8485 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8487 long sizeof_g_packet
= buf_len
/ 2;
8489 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8491 long offset
= rsa
->regs
[i
].offset
;
8492 long reg_size
= register_size (gdbarch
, i
);
8494 if (rsa
->regs
[i
].pnum
== -1)
8497 if (offset
>= sizeof_g_packet
)
8498 rsa
->regs
[i
].in_g_packet
= 0;
8499 else if (offset
+ reg_size
> sizeof_g_packet
)
8500 error (_("Truncated register %d in remote 'g' packet"), i
);
8502 rsa
->regs
[i
].in_g_packet
= 1;
8505 /* Looks valid enough, we can assume this is the correct length
8506 for a 'g' packet. It's important not to adjust
8507 rsa->sizeof_g_packet if we have truncated registers otherwise
8508 this "if" won't be run the next time the method is called
8509 with a packet of the same size and one of the internal errors
8510 below will trigger instead. */
8511 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8514 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8516 /* Unimplemented registers read as all bits zero. */
8517 memset (regs
, 0, rsa
->sizeof_g_packet
);
8519 /* Reply describes registers byte by byte, each byte encoded as two
8520 hex characters. Suck them all up, then supply them to the
8521 register cacheing/storage mechanism. */
8523 p
= rs
->buf
.data ();
8524 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8526 if (p
[0] == 0 || p
[1] == 0)
8527 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8528 internal_error (__FILE__
, __LINE__
,
8529 _("unexpected end of 'g' packet reply"));
8531 if (p
[0] == 'x' && p
[1] == 'x')
8532 regs
[i
] = 0; /* 'x' */
8534 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8538 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8540 struct packet_reg
*r
= &rsa
->regs
[i
];
8541 long reg_size
= register_size (gdbarch
, i
);
8545 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8546 /* This shouldn't happen - we adjusted in_g_packet above. */
8547 internal_error (__FILE__
, __LINE__
,
8548 _("unexpected end of 'g' packet reply"));
8549 else if (rs
->buf
[r
->offset
* 2] == 'x')
8551 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8552 /* The register isn't available, mark it as such (at
8553 the same time setting the value to zero). */
8554 regcache
->raw_supply (r
->regnum
, NULL
);
8557 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8563 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8566 process_g_packet (regcache
);
8569 /* Make the remote selected traceframe match GDB's selected
8573 remote_target::set_remote_traceframe ()
8576 struct remote_state
*rs
= get_remote_state ();
8578 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8581 /* Avoid recursion, remote_trace_find calls us again. */
8582 rs
->remote_traceframe_number
= get_traceframe_number ();
8584 newnum
= target_trace_find (tfind_number
,
8585 get_traceframe_number (), 0, 0, NULL
);
8587 /* Should not happen. If it does, all bets are off. */
8588 if (newnum
!= get_traceframe_number ())
8589 warning (_("could not set remote traceframe"));
8593 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8595 struct gdbarch
*gdbarch
= regcache
->arch ();
8596 struct remote_state
*rs
= get_remote_state ();
8597 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8600 set_remote_traceframe ();
8601 set_general_thread (regcache
->ptid ());
8605 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8607 gdb_assert (reg
!= NULL
);
8609 /* If this register might be in the 'g' packet, try that first -
8610 we are likely to read more than one register. If this is the
8611 first 'g' packet, we might be overly optimistic about its
8612 contents, so fall back to 'p'. */
8613 if (reg
->in_g_packet
)
8615 fetch_registers_using_g (regcache
);
8616 if (reg
->in_g_packet
)
8620 if (fetch_register_using_p (regcache
, reg
))
8623 /* This register is not available. */
8624 regcache
->raw_supply (reg
->regnum
, NULL
);
8629 fetch_registers_using_g (regcache
);
8631 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8632 if (!rsa
->regs
[i
].in_g_packet
)
8633 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8635 /* This register is not available. */
8636 regcache
->raw_supply (i
, NULL
);
8640 /* Prepare to store registers. Since we may send them all (using a
8641 'G' request), we have to read out the ones we don't want to change
8645 remote_target::prepare_to_store (struct regcache
*regcache
)
8647 struct remote_state
*rs
= get_remote_state ();
8648 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8651 /* Make sure the entire registers array is valid. */
8652 switch (packet_support (PACKET_P
))
8654 case PACKET_DISABLE
:
8655 case PACKET_SUPPORT_UNKNOWN
:
8656 /* Make sure all the necessary registers are cached. */
8657 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8658 if (rsa
->regs
[i
].in_g_packet
)
8659 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8666 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8667 packet was not recognized. */
8670 remote_target::store_register_using_P (const struct regcache
*regcache
,
8673 struct gdbarch
*gdbarch
= regcache
->arch ();
8674 struct remote_state
*rs
= get_remote_state ();
8675 /* Try storing a single register. */
8676 char *buf
= rs
->buf
.data ();
8677 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8680 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8683 if (reg
->pnum
== -1)
8686 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8687 p
= buf
+ strlen (buf
);
8688 regcache
->raw_collect (reg
->regnum
, regp
);
8689 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8691 getpkt (&rs
->buf
, 0);
8693 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8698 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8699 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8700 case PACKET_UNKNOWN
:
8703 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8707 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8708 contents of the register cache buffer. FIXME: ignores errors. */
8711 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8713 struct remote_state
*rs
= get_remote_state ();
8714 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8718 /* Extract all the registers in the regcache copying them into a
8723 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8724 memset (regs
, 0, rsa
->sizeof_g_packet
);
8725 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8727 struct packet_reg
*r
= &rsa
->regs
[i
];
8730 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8734 /* Command describes registers byte by byte,
8735 each byte encoded as two hex characters. */
8736 p
= rs
->buf
.data ();
8738 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8740 getpkt (&rs
->buf
, 0);
8741 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8742 error (_("Could not write registers; remote failure reply '%s'"),
8746 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8747 of the register cache buffer. FIXME: ignores errors. */
8750 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8752 struct gdbarch
*gdbarch
= regcache
->arch ();
8753 struct remote_state
*rs
= get_remote_state ();
8754 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8757 set_remote_traceframe ();
8758 set_general_thread (regcache
->ptid ());
8762 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8764 gdb_assert (reg
!= NULL
);
8766 /* Always prefer to store registers using the 'P' packet if
8767 possible; we often change only a small number of registers.
8768 Sometimes we change a larger number; we'd need help from a
8769 higher layer to know to use 'G'. */
8770 if (store_register_using_P (regcache
, reg
))
8773 /* For now, don't complain if we have no way to write the
8774 register. GDB loses track of unavailable registers too
8775 easily. Some day, this may be an error. We don't have
8776 any way to read the register, either... */
8777 if (!reg
->in_g_packet
)
8780 store_registers_using_G (regcache
);
8784 store_registers_using_G (regcache
);
8786 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8787 if (!rsa
->regs
[i
].in_g_packet
)
8788 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8789 /* See above for why we do not issue an error here. */
8794 /* Return the number of hex digits in num. */
8797 hexnumlen (ULONGEST num
)
8801 for (i
= 0; num
!= 0; i
++)
8804 return std::max (i
, 1);
8807 /* Set BUF to the minimum number of hex digits representing NUM. */
8810 hexnumstr (char *buf
, ULONGEST num
)
8812 int len
= hexnumlen (num
);
8814 return hexnumnstr (buf
, num
, len
);
8818 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8821 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8827 for (i
= width
- 1; i
>= 0; i
--)
8829 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8836 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8839 remote_address_masked (CORE_ADDR addr
)
8841 unsigned int address_size
= remote_address_size
;
8843 /* If "remoteaddresssize" was not set, default to target address size. */
8845 address_size
= gdbarch_addr_bit (target_gdbarch ());
8847 if (address_size
> 0
8848 && address_size
< (sizeof (ULONGEST
) * 8))
8850 /* Only create a mask when that mask can safely be constructed
8851 in a ULONGEST variable. */
8854 mask
= (mask
<< address_size
) - 1;
8860 /* Determine whether the remote target supports binary downloading.
8861 This is accomplished by sending a no-op memory write of zero length
8862 to the target at the specified address. It does not suffice to send
8863 the whole packet, since many stubs strip the eighth bit and
8864 subsequently compute a wrong checksum, which causes real havoc with
8867 NOTE: This can still lose if the serial line is not eight-bit
8868 clean. In cases like this, the user should clear "remote
8872 remote_target::check_binary_download (CORE_ADDR addr
)
8874 struct remote_state
*rs
= get_remote_state ();
8876 switch (packet_support (PACKET_X
))
8878 case PACKET_DISABLE
:
8882 case PACKET_SUPPORT_UNKNOWN
:
8886 p
= rs
->buf
.data ();
8888 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8890 p
+= hexnumstr (p
, (ULONGEST
) 0);
8894 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8895 getpkt (&rs
->buf
, 0);
8897 if (rs
->buf
[0] == '\0')
8899 remote_debug_printf ("binary downloading NOT supported by target");
8900 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8904 remote_debug_printf ("binary downloading supported by target");
8905 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8912 /* Helper function to resize the payload in order to try to get a good
8913 alignment. We try to write an amount of data such that the next write will
8914 start on an address aligned on REMOTE_ALIGN_WRITES. */
8917 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8919 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8922 /* Write memory data directly to the remote machine.
8923 This does not inform the data cache; the data cache uses this.
8924 HEADER is the starting part of the packet.
8925 MEMADDR is the address in the remote memory space.
8926 MYADDR is the address of the buffer in our space.
8927 LEN_UNITS is the number of addressable units to write.
8928 UNIT_SIZE is the length in bytes of an addressable unit.
8929 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8930 should send data as binary ('X'), or hex-encoded ('M').
8932 The function creates packet of the form
8933 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8935 where encoding of <DATA> is terminated by PACKET_FORMAT.
8937 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8940 Return the transferred status, error or OK (an
8941 'enum target_xfer_status' value). Save the number of addressable units
8942 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8944 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8945 exchange between gdb and the stub could look like (?? in place of the
8951 -> $M1000,3:eeeeffffeeee#??
8955 <- eeeeffffeeeedddd */
8958 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8959 const gdb_byte
*myaddr
,
8962 ULONGEST
*xfered_len_units
,
8963 char packet_format
, int use_length
)
8965 struct remote_state
*rs
= get_remote_state ();
8971 int payload_capacity_bytes
;
8972 int payload_length_bytes
;
8974 if (packet_format
!= 'X' && packet_format
!= 'M')
8975 internal_error (__FILE__
, __LINE__
,
8976 _("remote_write_bytes_aux: bad packet format"));
8979 return TARGET_XFER_EOF
;
8981 payload_capacity_bytes
= get_memory_write_packet_size ();
8983 /* The packet buffer will be large enough for the payload;
8984 get_memory_packet_size ensures this. */
8987 /* Compute the size of the actual payload by subtracting out the
8988 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8990 payload_capacity_bytes
-= strlen ("$,:#NN");
8992 /* The comma won't be used. */
8993 payload_capacity_bytes
+= 1;
8994 payload_capacity_bytes
-= strlen (header
);
8995 payload_capacity_bytes
-= hexnumlen (memaddr
);
8997 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8999 strcat (rs
->buf
.data (), header
);
9000 p
= rs
->buf
.data () + strlen (header
);
9002 /* Compute a best guess of the number of bytes actually transfered. */
9003 if (packet_format
== 'X')
9005 /* Best guess at number of bytes that will fit. */
9006 todo_units
= std::min (len_units
,
9007 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
9009 payload_capacity_bytes
-= hexnumlen (todo_units
);
9010 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
9014 /* Number of bytes that will fit. */
9016 = std::min (len_units
,
9017 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
9019 payload_capacity_bytes
-= hexnumlen (todo_units
);
9020 todo_units
= std::min (todo_units
,
9021 (payload_capacity_bytes
/ unit_size
) / 2);
9024 if (todo_units
<= 0)
9025 internal_error (__FILE__
, __LINE__
,
9026 _("minimum packet size too small to write data"));
9028 /* If we already need another packet, then try to align the end
9029 of this packet to a useful boundary. */
9030 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
9031 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
9033 /* Append "<memaddr>". */
9034 memaddr
= remote_address_masked (memaddr
);
9035 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9042 /* Append the length and retain its location and size. It may need to be
9043 adjusted once the packet body has been created. */
9045 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
9053 /* Append the packet body. */
9054 if (packet_format
== 'X')
9056 /* Binary mode. Send target system values byte by byte, in
9057 increasing byte addresses. Only escape certain critical
9059 payload_length_bytes
=
9060 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
9061 &units_written
, payload_capacity_bytes
);
9063 /* If not all TODO units fit, then we'll need another packet. Make
9064 a second try to keep the end of the packet aligned. Don't do
9065 this if the packet is tiny. */
9066 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
9070 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
9072 if (new_todo_units
!= units_written
)
9073 payload_length_bytes
=
9074 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
9075 (gdb_byte
*) p
, &units_written
,
9076 payload_capacity_bytes
);
9079 p
+= payload_length_bytes
;
9080 if (use_length
&& units_written
< todo_units
)
9082 /* Escape chars have filled up the buffer prematurely,
9083 and we have actually sent fewer units than planned.
9084 Fix-up the length field of the packet. Use the same
9085 number of characters as before. */
9086 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
9088 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
9093 /* Normal mode: Send target system values byte by byte, in
9094 increasing byte addresses. Each byte is encoded as a two hex
9096 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
9097 units_written
= todo_units
;
9100 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
9101 getpkt (&rs
->buf
, 0);
9103 if (rs
->buf
[0] == 'E')
9104 return TARGET_XFER_E_IO
;
9106 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
9107 send fewer units than we'd planned. */
9108 *xfered_len_units
= (ULONGEST
) units_written
;
9109 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9112 /* Write memory data directly to the remote machine.
9113 This does not inform the data cache; the data cache uses this.
9114 MEMADDR is the address in the remote memory space.
9115 MYADDR is the address of the buffer in our space.
9116 LEN is the number of bytes.
9118 Return the transferred status, error or OK (an
9119 'enum target_xfer_status' value). Save the number of bytes
9120 transferred in *XFERED_LEN. Only transfer a single packet. */
9123 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
9124 ULONGEST len
, int unit_size
,
9125 ULONGEST
*xfered_len
)
9127 const char *packet_format
= NULL
;
9129 /* Check whether the target supports binary download. */
9130 check_binary_download (memaddr
);
9132 switch (packet_support (PACKET_X
))
9135 packet_format
= "X";
9137 case PACKET_DISABLE
:
9138 packet_format
= "M";
9140 case PACKET_SUPPORT_UNKNOWN
:
9141 internal_error (__FILE__
, __LINE__
,
9142 _("remote_write_bytes: bad internal state"));
9144 internal_error (__FILE__
, __LINE__
, _("bad switch"));
9147 return remote_write_bytes_aux (packet_format
,
9148 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
9149 packet_format
[0], 1);
9152 /* Read memory data directly from the remote machine.
9153 This does not use the data cache; the data cache uses this.
9154 MEMADDR is the address in the remote memory space.
9155 MYADDR is the address of the buffer in our space.
9156 LEN_UNITS is the number of addressable memory units to read..
9157 UNIT_SIZE is the length in bytes of an addressable unit.
9159 Return the transferred status, error or OK (an
9160 'enum target_xfer_status' value). Save the number of bytes
9161 transferred in *XFERED_LEN_UNITS.
9163 See the comment of remote_write_bytes_aux for an example of
9164 memory read/write exchange between gdb and the stub. */
9167 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
9169 int unit_size
, ULONGEST
*xfered_len_units
)
9171 struct remote_state
*rs
= get_remote_state ();
9172 int buf_size_bytes
; /* Max size of packet output buffer. */
9177 buf_size_bytes
= get_memory_read_packet_size ();
9178 /* The packet buffer will be large enough for the payload;
9179 get_memory_packet_size ensures this. */
9181 /* Number of units that will fit. */
9182 todo_units
= std::min (len_units
,
9183 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
9185 /* Construct "m"<memaddr>","<len>". */
9186 memaddr
= remote_address_masked (memaddr
);
9187 p
= rs
->buf
.data ();
9189 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9191 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
9194 getpkt (&rs
->buf
, 0);
9195 if (rs
->buf
[0] == 'E'
9196 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
9197 && rs
->buf
[3] == '\0')
9198 return TARGET_XFER_E_IO
;
9199 /* Reply describes memory byte by byte, each byte encoded as two hex
9201 p
= rs
->buf
.data ();
9202 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
9203 /* Return what we have. Let higher layers handle partial reads. */
9204 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
9205 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9208 /* Using the set of read-only target sections of remote, read live
9211 For interface/parameters/return description see target.h,
9215 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
9219 ULONGEST
*xfered_len
)
9221 const struct target_section
*secp
;
9223 secp
= target_section_by_addr (this, memaddr
);
9225 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
9227 ULONGEST memend
= memaddr
+ len
;
9229 const target_section_table
*table
= target_get_section_table (this);
9230 for (const target_section
&p
: *table
)
9232 if (memaddr
>= p
.addr
)
9234 if (memend
<= p
.endaddr
)
9236 /* Entire transfer is within this section. */
9237 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9240 else if (memaddr
>= p
.endaddr
)
9242 /* This section ends before the transfer starts. */
9247 /* This section overlaps the transfer. Just do half. */
9248 len
= p
.endaddr
- memaddr
;
9249 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9256 return TARGET_XFER_EOF
;
9259 /* Similar to remote_read_bytes_1, but it reads from the remote stub
9260 first if the requested memory is unavailable in traceframe.
9261 Otherwise, fall back to remote_read_bytes_1. */
9264 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
9265 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
9266 ULONGEST
*xfered_len
)
9269 return TARGET_XFER_EOF
;
9271 if (get_traceframe_number () != -1)
9273 std::vector
<mem_range
> available
;
9275 /* If we fail to get the set of available memory, then the
9276 target does not support querying traceframe info, and so we
9277 attempt reading from the traceframe anyway (assuming the
9278 target implements the old QTro packet then). */
9279 if (traceframe_available_memory (&available
, memaddr
, len
))
9281 if (available
.empty () || available
[0].start
!= memaddr
)
9283 enum target_xfer_status res
;
9285 /* Don't read into the traceframe's available
9287 if (!available
.empty ())
9289 LONGEST oldlen
= len
;
9291 len
= available
[0].start
- memaddr
;
9292 gdb_assert (len
<= oldlen
);
9295 /* This goes through the topmost target again. */
9296 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
9297 len
, unit_size
, xfered_len
);
9298 if (res
== TARGET_XFER_OK
)
9299 return TARGET_XFER_OK
;
9302 /* No use trying further, we know some memory starting
9303 at MEMADDR isn't available. */
9305 return (*xfered_len
!= 0) ?
9306 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
9310 /* Don't try to read more than how much is available, in
9311 case the target implements the deprecated QTro packet to
9312 cater for older GDBs (the target's knowledge of read-only
9313 sections may be outdated by now). */
9314 len
= available
[0].length
;
9318 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
9323 /* Sends a packet with content determined by the printf format string
9324 FORMAT and the remaining arguments, then gets the reply. Returns
9325 whether the packet was a success, a failure, or unknown. */
9328 remote_target::remote_send_printf (const char *format
, ...)
9330 struct remote_state
*rs
= get_remote_state ();
9331 int max_size
= get_remote_packet_size ();
9334 va_start (ap
, format
);
9337 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
9341 if (size
>= max_size
)
9342 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
9344 if (putpkt (rs
->buf
) < 0)
9345 error (_("Communication problem with target."));
9348 getpkt (&rs
->buf
, 0);
9350 return packet_check_result (rs
->buf
);
9353 /* Flash writing can take quite some time. We'll set
9354 effectively infinite timeout for flash operations.
9355 In future, we'll need to decide on a better approach. */
9356 static const int remote_flash_timeout
= 1000;
9359 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9361 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9362 enum packet_result ret
;
9363 scoped_restore restore_timeout
9364 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9366 ret
= remote_send_printf ("vFlashErase:%s,%s",
9367 phex (address
, addr_size
),
9371 case PACKET_UNKNOWN
:
9372 error (_("Remote target does not support flash erase"));
9374 error (_("Error erasing flash with vFlashErase packet"));
9381 remote_target::remote_flash_write (ULONGEST address
,
9382 ULONGEST length
, ULONGEST
*xfered_len
,
9383 const gdb_byte
*data
)
9385 scoped_restore restore_timeout
9386 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9387 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9392 remote_target::flash_done ()
9396 scoped_restore restore_timeout
9397 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9399 ret
= remote_send_printf ("vFlashDone");
9403 case PACKET_UNKNOWN
:
9404 error (_("Remote target does not support vFlashDone"));
9406 error (_("Error finishing flash operation"));
9413 remote_target::files_info ()
9415 puts_filtered ("Debugging a target over a serial line.\n");
9418 /* Stuff for dealing with the packets which are part of this protocol.
9419 See comment at top of file for details. */
9421 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9422 error to higher layers. Called when a serial error is detected.
9423 The exception message is STRING, followed by a colon and a blank,
9424 the system error message for errno at function entry and final dot
9425 for output compatibility with throw_perror_with_name. */
9428 unpush_and_perror (remote_target
*target
, const char *string
)
9430 int saved_errno
= errno
;
9432 remote_unpush_target (target
);
9433 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9434 safe_strerror (saved_errno
));
9437 /* Read a single character from the remote end. The current quit
9438 handler is overridden to avoid quitting in the middle of packet
9439 sequence, as that would break communication with the remote server.
9440 See remote_serial_quit_handler for more detail. */
9443 remote_target::readchar (int timeout
)
9446 struct remote_state
*rs
= get_remote_state ();
9449 scoped_restore restore_quit_target
9450 = make_scoped_restore (&curr_quit_handler_target
, this);
9451 scoped_restore restore_quit
9452 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9454 rs
->got_ctrlc_during_io
= 0;
9456 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9458 if (rs
->got_ctrlc_during_io
)
9465 switch ((enum serial_rc
) ch
)
9468 remote_unpush_target (this);
9469 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9472 unpush_and_perror (this, _("Remote communication error. "
9473 "Target disconnected."));
9475 case SERIAL_TIMEOUT
:
9481 /* Wrapper for serial_write that closes the target and throws if
9482 writing fails. The current quit handler is overridden to avoid
9483 quitting in the middle of packet sequence, as that would break
9484 communication with the remote server. See
9485 remote_serial_quit_handler for more detail. */
9488 remote_target::remote_serial_write (const char *str
, int len
)
9490 struct remote_state
*rs
= get_remote_state ();
9492 scoped_restore restore_quit_target
9493 = make_scoped_restore (&curr_quit_handler_target
, this);
9494 scoped_restore restore_quit
9495 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9497 rs
->got_ctrlc_during_io
= 0;
9499 if (serial_write (rs
->remote_desc
, str
, len
))
9501 unpush_and_perror (this, _("Remote communication error. "
9502 "Target disconnected."));
9505 if (rs
->got_ctrlc_during_io
)
9509 /* Return a string representing an escaped version of BUF, of len N.
9510 E.g. \n is converted to \\n, \t to \\t, etc. */
9513 escape_buffer (const char *buf
, int n
)
9517 stb
.putstrn (buf
, n
, '\\');
9518 return std::move (stb
.string ());
9521 /* Display a null-terminated packet on stdout, for debugging, using C
9525 print_packet (const char *buf
)
9527 puts_filtered ("\"");
9528 fputstr_filtered (buf
, '"', gdb_stdout
);
9529 puts_filtered ("\"");
9533 remote_target::putpkt (const char *buf
)
9535 return putpkt_binary (buf
, strlen (buf
));
9538 /* Wrapper around remote_target::putpkt to avoid exporting
9542 putpkt (remote_target
*remote
, const char *buf
)
9544 return remote
->putpkt (buf
);
9547 /* Send a packet to the remote machine, with error checking. The data
9548 of the packet is in BUF. The string in BUF can be at most
9549 get_remote_packet_size () - 5 to account for the $, # and checksum,
9550 and for a possible /0 if we are debugging (remote_debug) and want
9551 to print the sent packet as a string. */
9554 remote_target::putpkt_binary (const char *buf
, int cnt
)
9556 struct remote_state
*rs
= get_remote_state ();
9558 unsigned char csum
= 0;
9559 gdb::def_vector
<char> data (cnt
+ 6);
9560 char *buf2
= data
.data ();
9566 /* Catch cases like trying to read memory or listing threads while
9567 we're waiting for a stop reply. The remote server wouldn't be
9568 ready to handle this request, so we'd hang and timeout. We don't
9569 have to worry about this in synchronous mode, because in that
9570 case it's not possible to issue a command while the target is
9571 running. This is not a problem in non-stop mode, because in that
9572 case, the stub is always ready to process serial input. */
9573 if (!target_is_non_stop_p ()
9574 && target_is_async_p ()
9575 && rs
->waiting_for_stop_reply
)
9577 error (_("Cannot execute this command while the target is running.\n"
9578 "Use the \"interrupt\" command to stop the target\n"
9579 "and then try again."));
9582 /* We're sending out a new packet. Make sure we don't look at a
9583 stale cached response. */
9584 rs
->cached_wait_status
= 0;
9586 /* Copy the packet into buffer BUF2, encapsulating it
9587 and giving it a checksum. */
9592 for (i
= 0; i
< cnt
; i
++)
9598 *p
++ = tohex ((csum
>> 4) & 0xf);
9599 *p
++ = tohex (csum
& 0xf);
9601 /* Send it over and over until we get a positive ack. */
9609 int len
= (int) (p
- buf2
);
9612 if (remote_packet_max_chars
< 0)
9615 max_chars
= remote_packet_max_chars
;
9618 = escape_buffer (buf2
, std::min (len
, max_chars
));
9620 if (len
> max_chars
)
9621 remote_debug_printf_nofunc
9622 ("Sending packet: %s [%d bytes omitted]", str
.c_str (),
9625 remote_debug_printf_nofunc ("Sending packet: %s", str
.c_str ());
9627 remote_serial_write (buf2
, p
- buf2
);
9629 /* If this is a no acks version of the remote protocol, send the
9630 packet and move on. */
9634 /* Read until either a timeout occurs (-2) or '+' is read.
9635 Handle any notification that arrives in the mean time. */
9638 ch
= readchar (remote_timeout
);
9643 remote_debug_printf_nofunc ("Received Ack");
9646 remote_debug_printf_nofunc ("Received Nak");
9648 case SERIAL_TIMEOUT
:
9652 break; /* Retransmit buffer. */
9655 remote_debug_printf ("Packet instead of Ack, ignoring it");
9656 /* It's probably an old response sent because an ACK
9657 was lost. Gobble up the packet and ack it so it
9658 doesn't get retransmitted when we resend this
9661 remote_serial_write ("+", 1);
9662 continue; /* Now, go look for +. */
9669 /* If we got a notification, handle it, and go back to looking
9671 /* We've found the start of a notification. Now
9672 collect the data. */
9673 val
= read_frame (&rs
->buf
);
9676 remote_debug_printf_nofunc
9677 (" Notification received: %s",
9678 escape_buffer (rs
->buf
.data (), val
).c_str ());
9680 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9681 /* We're in sync now, rewait for the ack. */
9685 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9691 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9695 break; /* Here to retransmit. */
9699 /* This is wrong. If doing a long backtrace, the user should be
9700 able to get out next time we call QUIT, without anything as
9701 violent as interrupt_query. If we want to provide a way out of
9702 here without getting to the next QUIT, it should be based on
9703 hitting ^C twice as in remote_wait. */
9715 /* Come here after finding the start of a frame when we expected an
9716 ack. Do our best to discard the rest of this packet. */
9719 remote_target::skip_frame ()
9725 c
= readchar (remote_timeout
);
9728 case SERIAL_TIMEOUT
:
9729 /* Nothing we can do. */
9732 /* Discard the two bytes of checksum and stop. */
9733 c
= readchar (remote_timeout
);
9735 c
= readchar (remote_timeout
);
9738 case '*': /* Run length encoding. */
9739 /* Discard the repeat count. */
9740 c
= readchar (remote_timeout
);
9745 /* A regular character. */
9751 /* Come here after finding the start of the frame. Collect the rest
9752 into *BUF, verifying the checksum, length, and handling run-length
9753 compression. NUL terminate the buffer. If there is not enough room,
9756 Returns -1 on error, number of characters in buffer (ignoring the
9757 trailing NULL) on success. (could be extended to return one of the
9758 SERIAL status indications). */
9761 remote_target::read_frame (gdb::char_vector
*buf_p
)
9766 char *buf
= buf_p
->data ();
9767 struct remote_state
*rs
= get_remote_state ();
9774 c
= readchar (remote_timeout
);
9777 case SERIAL_TIMEOUT
:
9778 remote_debug_printf ("Timeout in mid-packet, retrying");
9782 remote_debug_printf ("Saw new packet start in middle of old one");
9783 return -1; /* Start a new packet, count retries. */
9787 unsigned char pktcsum
;
9793 check_0
= readchar (remote_timeout
);
9795 check_1
= readchar (remote_timeout
);
9797 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9799 remote_debug_printf ("Timeout in checksum, retrying");
9802 else if (check_0
< 0 || check_1
< 0)
9804 remote_debug_printf ("Communication error in checksum");
9808 /* Don't recompute the checksum; with no ack packets we
9809 don't have any way to indicate a packet retransmission
9814 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9815 if (csum
== pktcsum
)
9819 ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s",
9820 pktcsum
, csum
, escape_buffer (buf
, bc
).c_str ());
9822 /* Number of characters in buffer ignoring trailing
9826 case '*': /* Run length encoding. */
9831 c
= readchar (remote_timeout
);
9833 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9835 /* The character before ``*'' is repeated. */
9837 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9839 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9841 /* Make some more room in the buffer. */
9842 buf_p
->resize (buf_p
->size () + repeat
);
9843 buf
= buf_p
->data ();
9846 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9852 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9856 if (bc
>= buf_p
->size () - 1)
9858 /* Make some more room in the buffer. */
9859 buf_p
->resize (buf_p
->size () * 2);
9860 buf
= buf_p
->data ();
9870 /* Set this to the maximum number of seconds to wait instead of waiting forever
9871 in target_wait(). If this timer times out, then it generates an error and
9872 the command is aborted. This replaces most of the need for timeouts in the
9873 GDB test suite, and makes it possible to distinguish between a hung target
9874 and one with slow communications. */
9876 static int watchdog
= 0;
9878 show_watchdog (struct ui_file
*file
, int from_tty
,
9879 struct cmd_list_element
*c
, const char *value
)
9881 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
9884 /* Read a packet from the remote machine, with error checking, and
9885 store it in *BUF. Resize *BUF if necessary to hold the result. If
9886 FOREVER, wait forever rather than timing out; this is used (in
9887 synchronous mode) to wait for a target that is is executing user
9889 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9890 don't have to change all the calls to getpkt to deal with the
9891 return value, because at the moment I don't know what the right
9892 thing to do it for those. */
9895 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9897 getpkt_sane (buf
, forever
);
9901 /* Read a packet from the remote machine, with error checking, and
9902 store it in *BUF. Resize *BUF if necessary to hold the result. If
9903 FOREVER, wait forever rather than timing out; this is used (in
9904 synchronous mode) to wait for a target that is is executing user
9905 code to stop. If FOREVER == 0, this function is allowed to time
9906 out gracefully and return an indication of this to the caller.
9907 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9908 consider receiving a notification enough reason to return to the
9909 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9910 holds a notification or not (a regular packet). */
9913 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9914 int forever
, int expecting_notif
,
9917 struct remote_state
*rs
= get_remote_state ();
9923 /* We're reading a new response. Make sure we don't look at a
9924 previously cached response. */
9925 rs
->cached_wait_status
= 0;
9927 strcpy (buf
->data (), "timeout");
9930 timeout
= watchdog
> 0 ? watchdog
: -1;
9931 else if (expecting_notif
)
9932 timeout
= 0; /* There should already be a char in the buffer. If
9935 timeout
= remote_timeout
;
9939 /* Process any number of notifications, and then return when
9943 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9945 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9947 /* This can loop forever if the remote side sends us
9948 characters continuously, but if it pauses, we'll get
9949 SERIAL_TIMEOUT from readchar because of timeout. Then
9950 we'll count that as a retry.
9952 Note that even when forever is set, we will only wait
9953 forever prior to the start of a packet. After that, we
9954 expect characters to arrive at a brisk pace. They should
9955 show up within remote_timeout intervals. */
9957 c
= readchar (timeout
);
9958 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9960 if (c
== SERIAL_TIMEOUT
)
9962 if (expecting_notif
)
9963 return -1; /* Don't complain, it's normal to not get
9964 anything in this case. */
9966 if (forever
) /* Watchdog went off? Kill the target. */
9968 remote_unpush_target (this);
9969 throw_error (TARGET_CLOSE_ERROR
,
9970 _("Watchdog timeout has expired. "
9971 "Target detached."));
9974 remote_debug_printf ("Timed out.");
9978 /* We've found the start of a packet or notification.
9979 Now collect the data. */
9980 val
= read_frame (buf
);
9985 remote_serial_write ("-", 1);
9988 if (tries
> MAX_TRIES
)
9990 /* We have tried hard enough, and just can't receive the
9991 packet/notification. Give up. */
9992 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9994 /* Skip the ack char if we're in no-ack mode. */
9995 if (!rs
->noack_mode
)
9996 remote_serial_write ("+", 1);
10000 /* If we got an ordinary packet, return that to our caller. */
10007 if (remote_packet_max_chars
< 0)
10010 max_chars
= remote_packet_max_chars
;
10013 = escape_buffer (buf
->data (),
10014 std::min (val
, max_chars
));
10016 if (val
> max_chars
)
10017 remote_debug_printf_nofunc
10018 ("Packet received: %s [%d bytes omitted]", str
.c_str (),
10021 remote_debug_printf_nofunc ("Packet received: %s",
10025 /* Skip the ack char if we're in no-ack mode. */
10026 if (!rs
->noack_mode
)
10027 remote_serial_write ("+", 1);
10028 if (is_notif
!= NULL
)
10033 /* If we got a notification, handle it, and go back to looking
10037 gdb_assert (c
== '%');
10039 remote_debug_printf_nofunc
10040 (" Notification received: %s",
10041 escape_buffer (buf
->data (), val
).c_str ());
10043 if (is_notif
!= NULL
)
10046 handle_notification (rs
->notif_state
, buf
->data ());
10048 /* Notifications require no acknowledgement. */
10050 if (expecting_notif
)
10057 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
10059 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
10063 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
10066 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
10069 /* Kill any new fork children of process PID that haven't been
10070 processed by follow_fork. */
10073 remote_target::kill_new_fork_children (int pid
)
10075 remote_state
*rs
= get_remote_state ();
10076 struct notif_client
*notif
= ¬if_client_stop
;
10078 /* Kill the fork child threads of any threads in process PID
10079 that are stopped at a fork event. */
10080 for (thread_info
*thread
: all_non_exited_threads (this))
10082 struct target_waitstatus
*ws
= &thread
->pending_follow
;
10084 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
10086 int child_pid
= ws
->value
.related_pid
.pid ();
10089 res
= remote_vkill (child_pid
);
10091 error (_("Can't kill fork child process %d"), child_pid
);
10095 /* Check for any pending fork events (not reported or processed yet)
10096 in process PID and kill those fork child threads as well. */
10097 remote_notif_get_pending_events (notif
);
10098 for (auto &event
: rs
->stop_reply_queue
)
10099 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
10101 int child_pid
= event
->ws
.value
.related_pid
.pid ();
10104 res
= remote_vkill (child_pid
);
10106 error (_("Can't kill fork child process %d"), child_pid
);
10111 /* Target hook to kill the current inferior. */
10114 remote_target::kill ()
10117 int pid
= inferior_ptid
.pid ();
10118 struct remote_state
*rs
= get_remote_state ();
10120 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
10122 /* If we're stopped while forking and we haven't followed yet,
10123 kill the child task. We need to do this before killing the
10124 parent task because if this is a vfork then the parent will
10126 kill_new_fork_children (pid
);
10128 res
= remote_vkill (pid
);
10131 target_mourn_inferior (inferior_ptid
);
10136 /* If we are in 'target remote' mode and we are killing the only
10137 inferior, then we will tell gdbserver to exit and unpush the
10139 if (res
== -1 && !remote_multi_process_p (rs
)
10140 && number_of_live_inferiors (this) == 1)
10144 /* We've killed the remote end, we get to mourn it. If we are
10145 not in extended mode, mourning the inferior also unpushes
10146 remote_ops from the target stack, which closes the remote
10148 target_mourn_inferior (inferior_ptid
);
10153 error (_("Can't kill process"));
10156 /* Send a kill request to the target using the 'vKill' packet. */
10159 remote_target::remote_vkill (int pid
)
10161 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
10164 remote_state
*rs
= get_remote_state ();
10166 /* Tell the remote target to detach. */
10167 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
10169 getpkt (&rs
->buf
, 0);
10171 switch (packet_ok (rs
->buf
,
10172 &remote_protocol_packets
[PACKET_vKill
]))
10178 case PACKET_UNKNOWN
:
10181 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
10185 /* Send a kill request to the target using the 'k' packet. */
10188 remote_target::remote_kill_k ()
10190 /* Catch errors so the user can quit from gdb even when we
10191 aren't on speaking terms with the remote system. */
10196 catch (const gdb_exception_error
&ex
)
10198 if (ex
.error
== TARGET_CLOSE_ERROR
)
10200 /* If we got an (EOF) error that caused the target
10201 to go away, then we're done, that's what we wanted.
10202 "k" is susceptible to cause a premature EOF, given
10203 that the remote server isn't actually required to
10204 reply to "k", and it can happen that it doesn't
10205 even get to reply ACK to the "k". */
10209 /* Otherwise, something went wrong. We didn't actually kill
10210 the target. Just propagate the exception, and let the
10211 user or higher layers decide what to do. */
10217 remote_target::mourn_inferior ()
10219 struct remote_state
*rs
= get_remote_state ();
10221 /* We're no longer interested in notification events of an inferior
10222 that exited or was killed/detached. */
10223 discard_pending_stop_replies (current_inferior ());
10225 /* In 'target remote' mode with one inferior, we close the connection. */
10226 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
10228 remote_unpush_target (this);
10232 /* In case we got here due to an error, but we're going to stay
10234 rs
->waiting_for_stop_reply
= 0;
10236 /* If the current general thread belonged to the process we just
10237 detached from or has exited, the remote side current general
10238 thread becomes undefined. Considering a case like this:
10240 - We just got here due to a detach.
10241 - The process that we're detaching from happens to immediately
10242 report a global breakpoint being hit in non-stop mode, in the
10243 same thread we had selected before.
10244 - GDB attaches to this process again.
10245 - This event happens to be the next event we handle.
10247 GDB would consider that the current general thread didn't need to
10248 be set on the stub side (with Hg), since for all it knew,
10249 GENERAL_THREAD hadn't changed.
10251 Notice that although in all-stop mode, the remote server always
10252 sets the current thread to the thread reporting the stop event,
10253 that doesn't happen in non-stop mode; in non-stop, the stub *must
10254 not* change the current thread when reporting a breakpoint hit,
10255 due to the decoupling of event reporting and event handling.
10257 To keep things simple, we always invalidate our notion of the
10259 record_currthread (rs
, minus_one_ptid
);
10261 /* Call common code to mark the inferior as not running. */
10262 generic_mourn_inferior ();
10266 extended_remote_target::supports_disable_randomization ()
10268 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
10272 remote_target::extended_remote_disable_randomization (int val
)
10274 struct remote_state
*rs
= get_remote_state ();
10277 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10278 "QDisableRandomization:%x", val
);
10280 reply
= remote_get_noisy_reply ();
10281 if (*reply
== '\0')
10282 error (_("Target does not support QDisableRandomization."));
10283 if (strcmp (reply
, "OK") != 0)
10284 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10288 remote_target::extended_remote_run (const std::string
&args
)
10290 struct remote_state
*rs
= get_remote_state ();
10292 const char *remote_exec_file
= get_remote_exec_file ();
10294 /* If the user has disabled vRun support, or we have detected that
10295 support is not available, do not try it. */
10296 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10299 strcpy (rs
->buf
.data (), "vRun;");
10300 len
= strlen (rs
->buf
.data ());
10302 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10303 error (_("Remote file name too long for run packet"));
10304 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10305 strlen (remote_exec_file
));
10307 if (!args
.empty ())
10311 gdb_argv
argv (args
.c_str ());
10312 for (i
= 0; argv
[i
] != NULL
; i
++)
10314 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10315 error (_("Argument list too long for run packet"));
10316 rs
->buf
[len
++] = ';';
10317 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10322 rs
->buf
[len
++] = '\0';
10325 getpkt (&rs
->buf
, 0);
10327 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10330 /* We have a wait response. All is well. */
10332 case PACKET_UNKNOWN
:
10335 if (remote_exec_file
[0] == '\0')
10336 error (_("Running the default executable on the remote target failed; "
10337 "try \"set remote exec-file\"?"));
10339 error (_("Running \"%s\" on the remote target failed"),
10342 gdb_assert_not_reached (_("bad switch"));
10346 /* Helper function to send set/unset environment packets. ACTION is
10347 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10348 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10352 remote_target::send_environment_packet (const char *action
,
10353 const char *packet
,
10356 remote_state
*rs
= get_remote_state ();
10358 /* Convert the environment variable to an hex string, which
10359 is the best format to be transmitted over the wire. */
10360 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10363 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10364 "%s:%s", packet
, encoded_value
.c_str ());
10367 getpkt (&rs
->buf
, 0);
10368 if (strcmp (rs
->buf
.data (), "OK") != 0)
10369 warning (_("Unable to %s environment variable '%s' on remote."),
10373 /* Helper function to handle the QEnvironment* packets. */
10376 remote_target::extended_remote_environment_support ()
10378 remote_state
*rs
= get_remote_state ();
10380 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10382 putpkt ("QEnvironmentReset");
10383 getpkt (&rs
->buf
, 0);
10384 if (strcmp (rs
->buf
.data (), "OK") != 0)
10385 warning (_("Unable to reset environment on remote."));
10388 gdb_environ
*e
= ¤t_inferior ()->environment
;
10390 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10391 for (const std::string
&el
: e
->user_set_env ())
10392 send_environment_packet ("set", "QEnvironmentHexEncoded",
10395 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10396 for (const std::string
&el
: e
->user_unset_env ())
10397 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10400 /* Helper function to set the current working directory for the
10401 inferior in the remote target. */
10404 remote_target::extended_remote_set_inferior_cwd ()
10406 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10408 const char *inferior_cwd
= get_inferior_cwd ();
10409 remote_state
*rs
= get_remote_state ();
10411 if (inferior_cwd
!= NULL
)
10413 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10414 strlen (inferior_cwd
));
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
);