1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2019 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 "common/filestuff.h"
46 #include "common/rsp-low.h"
50 #include "common/gdb_sys_time.h"
52 #include "event-loop.h"
53 #include "event-top.h"
59 #include "gdbcore.h" /* for exec_bfd */
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 "common/agent.h"
73 #include "record-btrace.h"
75 #include "common/scoped_restore.h"
76 #include "common/environ.h"
77 #include "common/byte-vector.h"
78 #include <unordered_map>
80 /* The remote target. */
82 static const char remote_doc[] = N_("\
83 Use a remote computer via a serial line, using a gdb-specific protocol.\n\
84 Specify the serial device it is connected to\n\
85 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
87 #define OPAQUETHREADBYTES 8
89 /* a 64 bit opaque identifier */
90 typedef unsigned char threadref[OPAQUETHREADBYTES];
92 struct gdb_ext_thread_info;
93 struct threads_listing_context;
94 typedef int (*rmt_thread_action) (threadref *ref, void *context);
95 struct protocol_feature;
99 static void stop_reply_xfree (struct stop_reply *);
101 struct stop_reply_deleter
103 void operator() (stop_reply *r) const
105 stop_reply_xfree (r);
109 typedef std::unique_ptr<stop_reply, stop_reply_deleter> stop_reply_up;
111 /* Generic configuration support for packets the stub optionally
112 supports. Allows the user to specify the use of the packet as well
113 as allowing GDB to auto-detect support in the remote stub. */
117 PACKET_SUPPORT_UNKNOWN = 0,
122 /* Analyze a packet's return value and update the packet config
132 struct threads_listing_context;
134 /* Stub vCont actions support.
136 Each field is a boolean flag indicating whether the stub reports
137 support for the corresponding action. */
139 struct vCont_action_support
154 /* About this many threadisds fit in a packet. */
156 #define MAXTHREADLISTRESULTS 32
158 /* Data for the vFile:pread readahead cache. */
160 struct readahead_cache
162 /* Invalidate the readahead cache. */
165 /* Invalidate the readahead cache if it is holding data for FD. */
166 void invalidate_fd (int fd);
168 /* Serve pread from the readahead cache. Returns number of bytes
169 read, or 0 if the request can't be served from the cache. */
170 int pread (int fd, gdb_byte *read_buf, size_t len, ULONGEST offset);
172 /* The file descriptor for the file that is being cached. -1 if the
176 /* The offset into the file that the cache buffer corresponds
180 /* The buffer holding the cache contents. */
181 gdb_byte *buf = nullptr;
182 /* The buffer's size. We try to read as much as fits into a packet
186 /* Cache hit and miss counters. */
187 ULONGEST hit_count = 0;
188 ULONGEST miss_count = 0;
191 /* Description of the remote protocol for a given architecture. */
195 long offset; /* Offset into G packet. */
196 long regnum; /* GDB's internal register number. */
197 LONGEST pnum; /* Remote protocol register number. */
198 int in_g_packet; /* Always part of G packet. */
199 /* long size in bytes; == register_size (target_gdbarch (), regnum);
201 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
205 struct remote_arch_state
207 explicit remote_arch_state (struct gdbarch *gdbarch);
209 /* Description of the remote protocol registers. */
210 long sizeof_g_packet;
212 /* Description of the remote protocol registers indexed by REGNUM
213 (making an array gdbarch_num_regs in size). */
214 std::unique_ptr<packet_reg[]> regs;
216 /* This is the size (in chars) of the first response to the ``g''
217 packet. It is used as a heuristic when determining the maximum
218 size of memory-read and memory-write packets. A target will
219 typically only reserve a buffer large enough to hold the ``g''
220 packet. The size does not include packet overhead (headers and
222 long actual_register_packet_size;
224 /* This is the maximum size (in chars) of a non read/write packet.
225 It is also used as a cap on the size of read/write packets. */
226 long remote_packet_size;
229 /* Description of the remote protocol state for the currently
230 connected target. This is per-target state, and independent of the
231 selected architecture. */
240 /* Get the remote arch state for GDBARCH. */
241 struct remote_arch_state *get_remote_arch_state (struct gdbarch *gdbarch);
245 /* A buffer to use for incoming packets, and its current size. The
246 buffer is grown dynamically for larger incoming packets.
247 Outgoing packets may also be constructed in this buffer.
248 The size of the buffer is always at least REMOTE_PACKET_SIZE;
249 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
251 gdb::char_vector buf;
253 /* True if we're going through initial connection setup (finding out
254 about the remote side's threads, relocating symbols, etc.). */
255 bool starting_up = false;
257 /* If we negotiated packet size explicitly (and thus can bypass
258 heuristics for the largest packet size that will not overflow
259 a buffer in the stub), this will be set to that packet size.
260 Otherwise zero, meaning to use the guessed size. */
261 long explicit_packet_size = 0;
263 /* remote_wait is normally called when the target is running and
264 waits for a stop reply packet. But sometimes we need to call it
265 when the target is already stopped. We can send a "?" packet
266 and have remote_wait read the response. Or, if we already have
267 the response, we can stash it in BUF and tell remote_wait to
268 skip calling getpkt. This flag is set when BUF contains a
269 stop reply packet and the target is not waiting. */
270 int cached_wait_status = 0;
272 /* True, if in no ack mode. That is, neither GDB nor the stub will
273 expect acks from each other. The connection is assumed to be
275 bool noack_mode = false;
277 /* True if we're connected in extended remote mode. */
278 bool extended = false;
280 /* True if we resumed the target and we're waiting for the target to
281 stop. In the mean time, we can't start another command/query.
282 The remote server wouldn't be ready to process it, so we'd
283 timeout waiting for a reply that would never come and eventually
284 we'd close the connection. This can happen in asynchronous mode
285 because we allow GDB commands while the target is running. */
286 bool waiting_for_stop_reply = false;
288 /* The status of the stub support for the various vCont actions. */
289 vCont_action_support supports_vCont;
291 /* True if the user has pressed Ctrl-C, but the target hasn't
292 responded to that. */
293 bool ctrlc_pending_p = false;
295 /* True if we saw a Ctrl-C while reading or writing from/to the
296 remote descriptor. At that point it is not safe to send a remote
297 interrupt packet, so we instead remember we saw the Ctrl-C and
298 process it once we're done with sending/receiving the current
299 packet, which should be shortly. If however that takes too long,
300 and the user presses Ctrl-C again, we offer to disconnect. */
301 bool got_ctrlc_during_io = false;
303 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
304 remote_open knows that we don't have a file open when the program
306 struct serial *remote_desc = nullptr;
308 /* These are the threads which we last sent to the remote system. The
309 TID member will be -1 for all or -2 for not sent yet. */
310 ptid_t general_thread = null_ptid;
311 ptid_t continue_thread = null_ptid;
313 /* This is the traceframe which we last selected on the remote system.
314 It will be -1 if no traceframe is selected. */
315 int remote_traceframe_number = -1;
317 char *last_pass_packet = nullptr;
319 /* The last QProgramSignals packet sent to the target. We bypass
320 sending a new program signals list down to the target if the new
321 packet is exactly the same as the last we sent. IOW, we only let
322 the target know about program signals list changes. */
323 char *last_program_signals_packet = nullptr;
325 gdb_signal last_sent_signal = GDB_SIGNAL_0;
327 bool last_sent_step = false;
329 /* The execution direction of the last resume we got. */
330 exec_direction_kind last_resume_exec_dir = EXEC_FORWARD;
332 char *finished_object = nullptr;
333 char *finished_annex = nullptr;
334 ULONGEST finished_offset = 0;
336 /* Should we try the 'ThreadInfo' query packet?
338 This variable (NOT available to the user: auto-detect only!)
339 determines whether GDB will use the new, simpler "ThreadInfo"
340 query or the older, more complex syntax for thread queries.
341 This is an auto-detect variable (set to true at each connect,
342 and set to false when the target fails to recognize it). */
343 bool use_threadinfo_query = false;
344 bool use_threadextra_query = false;
346 threadref echo_nextthread {};
347 threadref nextthread {};
348 threadref resultthreadlist[MAXTHREADLISTRESULTS] {};
350 /* The state of remote notification. */
351 struct remote_notif_state *notif_state = nullptr;
353 /* The branch trace configuration. */
354 struct btrace_config btrace_config {};
356 /* The argument to the last "vFile:setfs:" packet we sent, used
357 to avoid sending repeated unnecessary "vFile:setfs:" packets.
358 Initialized to -1 to indicate that no "vFile:setfs:" packet
359 has yet been sent. */
362 /* A readahead cache for vFile:pread. Often, reading a binary
363 involves a sequence of small reads. E.g., when parsing an ELF
364 file. A readahead cache helps mostly the case of remote
365 debugging on a connection with higher latency, due to the
366 request/reply nature of the RSP. We only cache data for a single
367 file descriptor at a time. */
368 struct readahead_cache readahead_cache;
370 /* The list of already fetched and acknowledged stop events. This
371 queue is used for notification Stop, and other notifications
372 don't need queue for their events, because the notification
373 events of Stop can't be consumed immediately, so that events
374 should be queued first, and be consumed by remote_wait_{ns,as}
375 one per time. Other notifications can consume their events
376 immediately, so queue is not needed for them. */
377 std::vector<stop_reply_up> stop_reply_queue;
379 /* Asynchronous signal handle registered as event loop source for
380 when we have pending events ready to be passed to the core. */
381 struct async_event_handler *remote_async_inferior_event_token = nullptr;
383 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
384 ``forever'' still use the normal timeout mechanism. This is
385 currently used by the ASYNC code to guarentee that target reads
386 during the initial connect always time-out. Once getpkt has been
387 modified to return a timeout indication and, in turn
388 remote_wait()/wait_for_inferior() have gained a timeout parameter
390 int wait_forever_enabled_p = 1;
393 /* Mapping of remote protocol data for each gdbarch. Usually there
394 is only one entry here, though we may see more with stubs that
395 support multi-process. */
396 std::unordered_map<struct gdbarch *, remote_arch_state>
400 static const target_info remote_target_info = {
402 N_("Remote serial target in gdb-specific protocol"),
406 class remote_target : public process_stratum_target
409 remote_target () = default;
410 ~remote_target () override;
412 const target_info &info () const override
413 { return remote_target_info; }
415 thread_control_capabilities get_thread_control_capabilities () override
416 { return tc_schedlock; }
418 /* Open a remote connection. */
419 static void open (const char *, int);
421 void close () override;
423 void detach (inferior *, int) override;
424 void disconnect (const char *, int) override;
426 void commit_resume () override;
427 void resume (ptid_t, int, enum gdb_signal) override;
428 ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
430 void fetch_registers (struct regcache *, int) override;
431 void store_registers (struct regcache *, int) override;
432 void prepare_to_store (struct regcache *) override;
434 void files_info () override;
436 int insert_breakpoint (struct gdbarch *, struct bp_target_info *) override;
438 int remove_breakpoint (struct gdbarch *, struct bp_target_info *,
439 enum remove_bp_reason) override;
442 bool stopped_by_sw_breakpoint () override;
443 bool supports_stopped_by_sw_breakpoint () override;
445 bool stopped_by_hw_breakpoint () override;
447 bool supports_stopped_by_hw_breakpoint () override;
449 bool stopped_by_watchpoint () override;
451 bool stopped_data_address (CORE_ADDR *) override;
453 bool watchpoint_addr_within_range (CORE_ADDR, CORE_ADDR, int) override;
455 int can_use_hw_breakpoint (enum bptype, int, int) override;
457 int insert_hw_breakpoint (struct gdbarch *, struct bp_target_info *) override;
459 int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *) override;
461 int region_ok_for_hw_watchpoint (CORE_ADDR, int) override;
463 int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
464 struct expression *) override;
466 int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
467 struct expression *) override;
469 void kill () override;
471 void load (const char *, int) override;
473 void mourn_inferior () override;
475 void pass_signals (gdb::array_view<const unsigned char>) override;
477 int set_syscall_catchpoint (int, bool, int,
478 gdb::array_view<const int>) override;
480 void program_signals (gdb::array_view<const unsigned char>) override;
482 bool thread_alive (ptid_t ptid) override;
484 const char *thread_name (struct thread_info *) override;
486 void update_thread_list () override;
488 const char *pid_to_str (ptid_t) override;
490 const char *extra_thread_info (struct thread_info *) override;
492 ptid_t get_ada_task_ptid (long lwp, long thread) override;
494 thread_info *thread_handle_to_thread_info (const gdb_byte *thread_handle,
496 inferior *inf) override;
498 void stop (ptid_t) override;
500 void interrupt () override;
502 void pass_ctrlc () override;
504 enum target_xfer_status xfer_partial (enum target_object object,
507 const gdb_byte *writebuf,
508 ULONGEST offset, ULONGEST len,
509 ULONGEST *xfered_len) override;
511 ULONGEST get_memory_xfer_limit () override;
513 void rcmd (const char *command, struct ui_file *output) override;
515 char *pid_to_exec_file (int pid) override;
517 void log_command (const char *cmd) override
519 serial_log_command (this, cmd);
522 CORE_ADDR get_thread_local_address (ptid_t ptid,
523 CORE_ADDR load_module_addr,
524 CORE_ADDR offset) override;
526 bool can_execute_reverse () override;
528 std::vector<mem_region> memory_map () override;
530 void flash_erase (ULONGEST address, LONGEST length) override;
532 void flash_done () override;
534 const struct target_desc *read_description () override;
536 int search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
537 const gdb_byte *pattern, ULONGEST pattern_len,
538 CORE_ADDR *found_addrp) override;
540 bool can_async_p () override;
542 bool is_async_p () override;
544 void async (int) override;
546 void thread_events (int) override;
548 int can_do_single_step () override;
550 void terminal_inferior () override;
552 void terminal_ours () override;
554 bool supports_non_stop () override;
556 bool supports_multi_process () override;
558 bool supports_disable_randomization () override;
560 bool filesystem_is_local () override;
563 int fileio_open (struct inferior *inf, const char *filename,
564 int flags, int mode, int warn_if_slow,
565 int *target_errno) override;
567 int fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
568 ULONGEST offset, int *target_errno) override;
570 int fileio_pread (int fd, gdb_byte *read_buf, int len,
571 ULONGEST offset, int *target_errno) override;
573 int fileio_fstat (int fd, struct stat *sb, int *target_errno) override;
575 int fileio_close (int fd, int *target_errno) override;
577 int fileio_unlink (struct inferior *inf,
578 const char *filename,
579 int *target_errno) override;
581 gdb::optional<std::string>
582 fileio_readlink (struct inferior *inf,
583 const char *filename,
584 int *target_errno) override;
586 bool supports_enable_disable_tracepoint () override;
588 bool supports_string_tracing () override;
590 bool supports_evaluation_of_breakpoint_conditions () override;
592 bool can_run_breakpoint_commands () override;
594 void trace_init () override;
596 void download_tracepoint (struct bp_location *location) override;
598 bool can_download_tracepoint () override;
600 void download_trace_state_variable (const trace_state_variable &tsv) override;
602 void enable_tracepoint (struct bp_location *location) override;
604 void disable_tracepoint (struct bp_location *location) override;
606 void trace_set_readonly_regions () override;
608 void trace_start () override;
610 int get_trace_status (struct trace_status *ts) override;
612 void get_tracepoint_status (struct breakpoint *tp, struct uploaded_tp *utp)
615 void trace_stop () override;
617 int trace_find (enum trace_find_type type, int num,
618 CORE_ADDR addr1, CORE_ADDR addr2, int *tpp) override;
620 bool get_trace_state_variable_value (int tsv, LONGEST *val) override;
622 int save_trace_data (const char *filename) override;
624 int upload_tracepoints (struct uploaded_tp **utpp) override;
626 int upload_trace_state_variables (struct uploaded_tsv **utsvp) override;
628 LONGEST get_raw_trace_data (gdb_byte *buf, ULONGEST offset, LONGEST len) override;
630 int get_min_fast_tracepoint_insn_len () override;
632 void set_disconnected_tracing (int val) override;
634 void set_circular_trace_buffer (int val) override;
636 void set_trace_buffer_size (LONGEST val) override;
638 bool set_trace_notes (const char *user, const char *notes,
639 const char *stopnotes) override;
641 int core_of_thread (ptid_t ptid) override;
643 int verify_memory (const gdb_byte *data,
644 CORE_ADDR memaddr, ULONGEST size) override;
647 bool get_tib_address (ptid_t ptid, CORE_ADDR *addr) override;
649 void set_permissions () override;
651 bool static_tracepoint_marker_at (CORE_ADDR,
652 struct static_tracepoint_marker *marker)
655 std::vector<static_tracepoint_marker>
656 static_tracepoint_markers_by_strid (const char *id) override;
658 traceframe_info_up traceframe_info () override;
660 bool use_agent (bool use) override;
661 bool can_use_agent () override;
663 struct btrace_target_info *enable_btrace (ptid_t ptid,
664 const struct btrace_config *conf) override;
666 void disable_btrace (struct btrace_target_info *tinfo) override;
668 void teardown_btrace (struct btrace_target_info *tinfo) override;
670 enum btrace_error read_btrace (struct btrace_data *data,
671 struct btrace_target_info *btinfo,
672 enum btrace_read_type type) override;
674 const struct btrace_config *btrace_conf (const struct btrace_target_info *) override;
675 bool augmented_libraries_svr4_read () override;
676 int follow_fork (int, int) override;
677 void follow_exec (struct inferior *, char *) override;
678 int insert_fork_catchpoint (int) override;
679 int remove_fork_catchpoint (int) override;
680 int insert_vfork_catchpoint (int) override;
681 int remove_vfork_catchpoint (int) override;
682 int insert_exec_catchpoint (int) override;
683 int remove_exec_catchpoint (int) override;
684 enum exec_direction_kind execution_direction () override;
686 public: /* Remote specific methods. */
688 void remote_download_command_source (int num, ULONGEST addr,
689 struct command_line *cmds);
691 void remote_file_put (const char *local_file, const char *remote_file,
693 void remote_file_get (const char *remote_file, const char *local_file,
695 void remote_file_delete (const char *remote_file, int from_tty);
697 int remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
698 ULONGEST offset, int *remote_errno);
699 int remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
700 ULONGEST offset, int *remote_errno);
701 int remote_hostio_pread_vFile (int fd, gdb_byte *read_buf, int len,
702 ULONGEST offset, int *remote_errno);
704 int remote_hostio_send_command (int command_bytes, int which_packet,
705 int *remote_errno, char **attachment,
706 int *attachment_len);
707 int remote_hostio_set_filesystem (struct inferior *inf,
709 /* We should get rid of this and use fileio_open directly. */
710 int remote_hostio_open (struct inferior *inf, const char *filename,
711 int flags, int mode, int warn_if_slow,
713 int remote_hostio_close (int fd, int *remote_errno);
715 int remote_hostio_unlink (inferior *inf, const char *filename,
718 struct remote_state *get_remote_state ();
720 long get_remote_packet_size (void);
721 long get_memory_packet_size (struct memory_packet_config *config);
723 long get_memory_write_packet_size ();
724 long get_memory_read_packet_size ();
726 char *append_pending_thread_resumptions (char *p, char *endp,
728 static void open_1 (const char *name, int from_tty, int extended_p);
729 void start_remote (int from_tty, int extended_p);
730 void remote_detach_1 (struct inferior *inf, int from_tty);
732 char *append_resumption (char *p, char *endp,
733 ptid_t ptid, int step, gdb_signal siggnal);
734 int remote_resume_with_vcont (ptid_t ptid, int step,
737 void add_current_inferior_and_thread (char *wait_status);
739 ptid_t wait_ns (ptid_t ptid, struct target_waitstatus *status,
741 ptid_t wait_as (ptid_t ptid, target_waitstatus *status,
744 ptid_t process_stop_reply (struct stop_reply *stop_reply,
745 target_waitstatus *status);
747 void remote_notice_new_inferior (ptid_t currthread, int executing);
749 void process_initial_stop_replies (int from_tty);
751 thread_info *remote_add_thread (ptid_t ptid, bool running, bool executing);
753 void btrace_sync_conf (const btrace_config *conf);
755 void remote_btrace_maybe_reopen ();
757 void remove_new_fork_children (threads_listing_context *context);
758 void kill_new_fork_children (int pid);
759 void discard_pending_stop_replies (struct inferior *inf);
760 int stop_reply_queue_length ();
762 void check_pending_events_prevent_wildcard_vcont
763 (int *may_global_wildcard_vcont);
765 void discard_pending_stop_replies_in_queue ();
766 struct stop_reply *remote_notif_remove_queued_reply (ptid_t ptid);
767 struct stop_reply *queued_stop_reply (ptid_t ptid);
768 int peek_stop_reply (ptid_t ptid);
769 void remote_parse_stop_reply (const char *buf, stop_reply *event);
771 void remote_stop_ns (ptid_t ptid);
772 void remote_interrupt_as ();
773 void remote_interrupt_ns ();
775 char *remote_get_noisy_reply ();
776 int remote_query_attached (int pid);
777 inferior *remote_add_inferior (int fake_pid_p, int pid, int attached,
780 ptid_t remote_current_thread (ptid_t oldpid);
781 ptid_t get_current_thread (char *wait_status);
783 void set_thread (ptid_t ptid, int gen);
784 void set_general_thread (ptid_t ptid);
785 void set_continue_thread (ptid_t ptid);
786 void set_general_process ();
788 char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
790 int remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
791 gdb_ext_thread_info *info);
792 int remote_get_threadinfo (threadref *threadid, int fieldset,
793 gdb_ext_thread_info *info);
795 int parse_threadlist_response (char *pkt, int result_limit,
796 threadref *original_echo,
797 threadref *resultlist,
799 int remote_get_threadlist (int startflag, threadref *nextthread,
800 int result_limit, int *done, int *result_count,
801 threadref *threadlist);
803 int remote_threadlist_iterator (rmt_thread_action stepfunction,
804 void *context, int looplimit);
806 int remote_get_threads_with_ql (threads_listing_context *context);
807 int remote_get_threads_with_qxfer (threads_listing_context *context);
808 int remote_get_threads_with_qthreadinfo (threads_listing_context *context);
810 void extended_remote_restart ();
814 void remote_check_symbols ();
816 void remote_supported_packet (const struct protocol_feature *feature,
817 enum packet_support support,
818 const char *argument);
820 void remote_query_supported ();
822 void remote_packet_size (const protocol_feature *feature,
823 packet_support support, const char *value);
825 void remote_serial_quit_handler ();
827 void remote_detach_pid (int pid);
829 void remote_vcont_probe ();
831 void remote_resume_with_hc (ptid_t ptid, int step,
834 void send_interrupt_sequence ();
835 void interrupt_query ();
837 void remote_notif_get_pending_events (notif_client *nc);
839 int fetch_register_using_p (struct regcache *regcache,
841 int send_g_packet ();
842 void process_g_packet (struct regcache *regcache);
843 void fetch_registers_using_g (struct regcache *regcache);
844 int store_register_using_P (const struct regcache *regcache,
846 void store_registers_using_G (const struct regcache *regcache);
848 void set_remote_traceframe ();
850 void check_binary_download (CORE_ADDR addr);
852 target_xfer_status remote_write_bytes_aux (const char *header,
854 const gdb_byte *myaddr,
857 ULONGEST *xfered_len_units,
861 target_xfer_status remote_write_bytes (CORE_ADDR memaddr,
862 const gdb_byte *myaddr, ULONGEST len,
863 int unit_size, ULONGEST *xfered_len);
865 target_xfer_status remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr,
867 int unit_size, ULONGEST *xfered_len_units);
869 target_xfer_status remote_xfer_live_readonly_partial (gdb_byte *readbuf,
873 ULONGEST *xfered_len);
875 target_xfer_status remote_read_bytes (CORE_ADDR memaddr,
876 gdb_byte *myaddr, ULONGEST len,
878 ULONGEST *xfered_len);
880 packet_result remote_send_printf (const char *format, ...)
881 ATTRIBUTE_PRINTF (2, 3);
883 target_xfer_status remote_flash_write (ULONGEST address,
884 ULONGEST length, ULONGEST *xfered_len,
885 const gdb_byte *data);
887 int readchar (int timeout);
889 void remote_serial_write (const char *str, int len);
891 int putpkt (const char *buf);
892 int putpkt_binary (const char *buf, int cnt);
894 int putpkt (const gdb::char_vector &buf)
896 return putpkt (buf.data ());
900 long read_frame (gdb::char_vector *buf_p);
901 void getpkt (gdb::char_vector *buf, int forever);
902 int getpkt_or_notif_sane_1 (gdb::char_vector *buf, int forever,
903 int expecting_notif, int *is_notif);
904 int getpkt_sane (gdb::char_vector *buf, int forever);
905 int getpkt_or_notif_sane (gdb::char_vector *buf, int forever,
907 int remote_vkill (int pid);
908 void remote_kill_k ();
910 void extended_remote_disable_randomization (int val);
911 int extended_remote_run (const std::string &args);
913 void send_environment_packet (const char *action,
917 void extended_remote_environment_support ();
918 void extended_remote_set_inferior_cwd ();
920 target_xfer_status remote_write_qxfer (const char *object_name,
922 const gdb_byte *writebuf,
923 ULONGEST offset, LONGEST len,
924 ULONGEST *xfered_len,
925 struct packet_config *packet);
927 target_xfer_status remote_read_qxfer (const char *object_name,
929 gdb_byte *readbuf, ULONGEST offset,
931 ULONGEST *xfered_len,
932 struct packet_config *packet);
934 void push_stop_reply (struct stop_reply *new_event);
936 bool vcont_r_supported ();
938 void packet_command (const char *args, int from_tty);
940 private: /* data fields */
942 /* The remote state. Don't reference this directly. Use the
943 get_remote_state method instead. */
944 remote_state m_remote_state;
947 static const target_info extended_remote_target_info = {
949 N_("Extended remote serial target in gdb-specific protocol"),
953 /* Set up the extended remote target by extending the standard remote
954 target and adding to it. */
956 class extended_remote_target final : public remote_target
959 const target_info &info () const override
960 { return extended_remote_target_info; }
962 /* Open an extended-remote connection. */
963 static void open (const char *, int);
965 bool can_create_inferior () override { return true; }
966 void create_inferior (const char *, const std::string &,
967 char **, int) override;
969 void detach (inferior *, int) override;
971 bool can_attach () override { return true; }
972 void attach (const char *, int) override;
974 void post_attach (int) override;
975 bool supports_disable_randomization () override;
978 /* Per-program-space data key. */
979 static const struct program_space_data *remote_pspace_data;
981 /* The variable registered as the control variable used by the
982 remote exec-file commands. While the remote exec-file setting is
983 per-program-space, the set/show machinery uses this as the
984 location of the remote exec-file value. */
985 static char *remote_exec_file_var;
987 /* The size to align memory write packets, when practical. The protocol
988 does not guarantee any alignment, and gdb will generate short
989 writes and unaligned writes, but even as a best-effort attempt this
990 can improve bulk transfers. For instance, if a write is misaligned
991 relative to the target's data bus, the stub may need to make an extra
992 round trip fetching data from the target. This doesn't make a
993 huge difference, but it's easy to do, so we try to be helpful.
995 The alignment chosen is arbitrary; usually data bus width is
996 important here, not the possibly larger cache line size. */
997 enum { REMOTE_ALIGN_WRITES = 16 };
999 /* Prototypes for local functions. */
1001 static int hexnumlen (ULONGEST num);
1003 static int stubhex (int ch);
1005 static int hexnumstr (char *, ULONGEST);
1007 static int hexnumnstr (char *, ULONGEST, int);
1009 static CORE_ADDR remote_address_masked (CORE_ADDR);
1011 static void print_packet (const char *);
1013 static int stub_unpack_int (char *buff, int fieldlength);
1015 struct packet_config;
1017 static void show_packet_config_cmd (struct packet_config *config);
1019 static void show_remote_protocol_packet_cmd (struct ui_file *file,
1021 struct cmd_list_element *c,
1024 static ptid_t read_ptid (const char *buf, const char **obuf);
1026 static void remote_async_inferior_event_handler (gdb_client_data);
1028 static bool remote_read_description_p (struct target_ops *target);
1030 static void remote_console_output (const char *msg);
1032 static void remote_btrace_reset (remote_state *rs);
1034 static void remote_unpush_and_throw (void);
1038 static struct cmd_list_element *remote_cmdlist;
1040 /* For "set remote" and "show remote". */
1042 static struct cmd_list_element *remote_set_cmdlist;
1043 static struct cmd_list_element *remote_show_cmdlist;
1045 /* Controls whether GDB is willing to use range stepping. */
1047 static int use_range_stepping = 1;
1049 /* The max number of chars in debug output. The rest of chars are
1052 #define REMOTE_DEBUG_MAX_CHAR 512
1054 /* Private data that we'll store in (struct thread_info)->priv. */
1055 struct remote_thread_info : public private_thread_info
1061 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1062 sequence of bytes. */
1063 gdb::byte_vector thread_handle;
1065 /* Whether the target stopped for a breakpoint/watchpoint. */
1066 enum target_stop_reason stop_reason = TARGET_STOPPED_BY_NO_REASON;
1068 /* This is set to the data address of the access causing the target
1069 to stop for a watchpoint. */
1070 CORE_ADDR watch_data_address = 0;
1072 /* Fields used by the vCont action coalescing implemented in
1073 remote_resume / remote_commit_resume. remote_resume stores each
1074 thread's last resume request in these fields, so that a later
1075 remote_commit_resume knows which is the proper action for this
1076 thread to include in the vCont packet. */
1078 /* True if the last target_resume call for this thread was a step
1079 request, false if a continue request. */
1080 int last_resume_step = 0;
1082 /* The signal specified in the last target_resume call for this
1084 gdb_signal last_resume_sig = GDB_SIGNAL_0;
1086 /* Whether this thread was already vCont-resumed on the remote
1088 int vcont_resumed = 0;
1091 remote_state::remote_state ()
1096 remote_state::~remote_state ()
1098 xfree (this->last_pass_packet);
1099 xfree (this->last_program_signals_packet);
1100 xfree (this->finished_object);
1101 xfree (this->finished_annex);
1104 /* Utility: generate error from an incoming stub packet. */
1106 trace_error (char *buf)
1109 return; /* not an error msg */
1112 case '1': /* malformed packet error */
1113 if (*++buf == '0') /* general case: */
1114 error (_("remote.c: error in outgoing packet."));
1116 error (_("remote.c: error in outgoing packet at field #%ld."),
1117 strtol (buf, NULL, 16));
1119 error (_("Target returns error code '%s'."), buf);
1123 /* Utility: wait for reply from stub, while accepting "O" packets. */
1126 remote_target::remote_get_noisy_reply ()
1128 struct remote_state *rs = get_remote_state ();
1130 do /* Loop on reply from remote stub. */
1134 QUIT; /* Allow user to bail out with ^C. */
1135 getpkt (&rs->buf, 0);
1136 buf = rs->buf.data ();
1139 else if (startswith (buf, "qRelocInsn:"))
1142 CORE_ADDR from, to, org_to;
1144 int adjusted_size = 0;
1147 p = buf + strlen ("qRelocInsn:");
1148 pp = unpack_varlen_hex (p, &ul);
1150 error (_("invalid qRelocInsn packet: %s"), buf);
1154 unpack_varlen_hex (p, &ul);
1161 gdbarch_relocate_instruction (target_gdbarch (), &to, from);
1164 CATCH (ex, RETURN_MASK_ALL)
1166 if (ex.error == MEMORY_ERROR)
1168 /* Propagate memory errors silently back to the
1169 target. The stub may have limited the range of
1170 addresses we can write to, for example. */
1174 /* Something unexpectedly bad happened. Be verbose
1175 so we can tell what, and propagate the error back
1176 to the stub, so it doesn't get stuck waiting for
1178 exception_fprintf (gdb_stderr, ex,
1179 _("warning: relocating instruction: "));
1187 adjusted_size = to - org_to;
1189 xsnprintf (buf, rs->buf.size (), "qRelocInsn:%x", adjusted_size);
1193 else if (buf[0] == 'O' && buf[1] != 'K')
1194 remote_console_output (buf + 1); /* 'O' message from stub */
1196 return buf; /* Here's the actual reply. */
1201 struct remote_arch_state *
1202 remote_state::get_remote_arch_state (struct gdbarch *gdbarch)
1204 remote_arch_state *rsa;
1206 auto it = this->m_arch_states.find (gdbarch);
1207 if (it == this->m_arch_states.end ())
1209 auto p = this->m_arch_states.emplace (std::piecewise_construct,
1210 std::forward_as_tuple (gdbarch),
1211 std::forward_as_tuple (gdbarch));
1212 rsa = &p.first->second;
1214 /* Make sure that the packet buffer is plenty big enough for
1215 this architecture. */
1216 if (this->buf.size () < rsa->remote_packet_size)
1217 this->buf.resize (2 * rsa->remote_packet_size);
1225 /* Fetch the global remote target state. */
1228 remote_target::get_remote_state ()
1230 /* Make sure that the remote architecture state has been
1231 initialized, because doing so might reallocate rs->buf. Any
1232 function which calls getpkt also needs to be mindful of changes
1233 to rs->buf, but this call limits the number of places which run
1235 m_remote_state.get_remote_arch_state (target_gdbarch ());
1237 return &m_remote_state;
1240 /* Cleanup routine for the remote module's pspace data. */
1243 remote_pspace_data_cleanup (struct program_space *pspace, void *arg)
1245 char *remote_exec_file = (char *) arg;
1247 xfree (remote_exec_file);
1250 /* Fetch the remote exec-file from the current program space. */
1253 get_remote_exec_file (void)
1255 char *remote_exec_file;
1258 = (char *) program_space_data (current_program_space,
1259 remote_pspace_data);
1260 if (remote_exec_file == NULL)
1263 return remote_exec_file;
1266 /* Set the remote exec file for PSPACE. */
1269 set_pspace_remote_exec_file (struct program_space *pspace,
1270 char *remote_exec_file)
1272 char *old_file = (char *) program_space_data (pspace, remote_pspace_data);
1275 set_program_space_data (pspace, remote_pspace_data,
1276 xstrdup (remote_exec_file));
1279 /* The "set/show remote exec-file" set command hook. */
1282 set_remote_exec_file (const char *ignored, int from_tty,
1283 struct cmd_list_element *c)
1285 gdb_assert (remote_exec_file_var != NULL);
1286 set_pspace_remote_exec_file (current_program_space, remote_exec_file_var);
1289 /* The "set/show remote exec-file" show command hook. */
1292 show_remote_exec_file (struct ui_file *file, int from_tty,
1293 struct cmd_list_element *cmd, const char *value)
1295 fprintf_filtered (file, "%s\n", remote_exec_file_var);
1299 compare_pnums (const void *lhs_, const void *rhs_)
1301 const struct packet_reg * const *lhs
1302 = (const struct packet_reg * const *) lhs_;
1303 const struct packet_reg * const *rhs
1304 = (const struct packet_reg * const *) rhs_;
1306 if ((*lhs)->pnum < (*rhs)->pnum)
1308 else if ((*lhs)->pnum == (*rhs)->pnum)
1315 map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs)
1317 int regnum, num_remote_regs, offset;
1318 struct packet_reg **remote_regs;
1320 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
1322 struct packet_reg *r = ®s[regnum];
1324 if (register_size (gdbarch, regnum) == 0)
1325 /* Do not try to fetch zero-sized (placeholder) registers. */
1328 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
1333 /* Define the g/G packet format as the contents of each register
1334 with a remote protocol number, in order of ascending protocol
1337 remote_regs = XALLOCAVEC (struct packet_reg *, gdbarch_num_regs (gdbarch));
1338 for (num_remote_regs = 0, regnum = 0;
1339 regnum < gdbarch_num_regs (gdbarch);
1341 if (regs[regnum].pnum != -1)
1342 remote_regs[num_remote_regs++] = ®s[regnum];
1344 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
1347 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
1349 remote_regs[regnum]->in_g_packet = 1;
1350 remote_regs[regnum]->offset = offset;
1351 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
1357 /* Given the architecture described by GDBARCH, return the remote
1358 protocol register's number and the register's offset in the g/G
1359 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1360 If the target does not have a mapping for REGNUM, return false,
1361 otherwise, return true. */
1364 remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum,
1365 int *pnum, int *poffset)
1367 gdb_assert (regnum < gdbarch_num_regs (gdbarch));
1369 std::vector<packet_reg> regs (gdbarch_num_regs (gdbarch));
1371 map_regcache_remote_table (gdbarch, regs.data ());
1373 *pnum = regs[regnum].pnum;
1374 *poffset = regs[regnum].offset;
1379 remote_arch_state::remote_arch_state (struct gdbarch *gdbarch)
1381 /* Use the architecture to build a regnum<->pnum table, which will be
1382 1:1 unless a feature set specifies otherwise. */
1383 this->regs.reset (new packet_reg [gdbarch_num_regs (gdbarch)] ());
1385 /* Record the maximum possible size of the g packet - it may turn out
1387 this->sizeof_g_packet
1388 = map_regcache_remote_table (gdbarch, this->regs.get ());
1390 /* Default maximum number of characters in a packet body. Many
1391 remote stubs have a hardwired buffer size of 400 bytes
1392 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1393 as the maximum packet-size to ensure that the packet and an extra
1394 NUL character can always fit in the buffer. This stops GDB
1395 trashing stubs that try to squeeze an extra NUL into what is
1396 already a full buffer (As of 1999-12-04 that was most stubs). */
1397 this->remote_packet_size = 400 - 1;
1399 /* This one is filled in when a ``g'' packet is received. */
1400 this->actual_register_packet_size = 0;
1402 /* Should rsa->sizeof_g_packet needs more space than the
1403 default, adjust the size accordingly. Remember that each byte is
1404 encoded as two characters. 32 is the overhead for the packet
1405 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1406 (``$NN:G...#NN'') is a better guess, the below has been padded a
1408 if (this->sizeof_g_packet > ((this->remote_packet_size - 32) / 2))
1409 this->remote_packet_size = (this->sizeof_g_packet * 2 + 32);
1412 /* Get a pointer to the current remote target. If not connected to a
1413 remote target, return NULL. */
1415 static remote_target *
1416 get_current_remote_target ()
1418 target_ops *proc_target = find_target_at (process_stratum);
1419 return dynamic_cast<remote_target *> (proc_target);
1422 /* Return the current allowed size of a remote packet. This is
1423 inferred from the current architecture, and should be used to
1424 limit the length of outgoing packets. */
1426 remote_target::get_remote_packet_size ()
1428 struct remote_state *rs = get_remote_state ();
1429 remote_arch_state *rsa = rs->get_remote_arch_state (target_gdbarch ());
1431 if (rs->explicit_packet_size)
1432 return rs->explicit_packet_size;
1434 return rsa->remote_packet_size;
1437 static struct packet_reg *
1438 packet_reg_from_regnum (struct gdbarch *gdbarch, struct remote_arch_state *rsa,
1441 if (regnum < 0 && regnum >= gdbarch_num_regs (gdbarch))
1445 struct packet_reg *r = &rsa->regs[regnum];
1447 gdb_assert (r->regnum == regnum);
1452 static struct packet_reg *
1453 packet_reg_from_pnum (struct gdbarch *gdbarch, struct remote_arch_state *rsa,
1458 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
1460 struct packet_reg *r = &rsa->regs[i];
1462 if (r->pnum == pnum)
1468 /* Allow the user to specify what sequence to send to the remote
1469 when he requests a program interruption: Although ^C is usually
1470 what remote systems expect (this is the default, here), it is
1471 sometimes preferable to send a break. On other systems such
1472 as the Linux kernel, a break followed by g, which is Magic SysRq g
1473 is required in order to interrupt the execution. */
1474 const char interrupt_sequence_control_c[] = "Ctrl-C";
1475 const char interrupt_sequence_break[] = "BREAK";
1476 const char interrupt_sequence_break_g[] = "BREAK-g";
1477 static const char *const interrupt_sequence_modes[] =
1479 interrupt_sequence_control_c,
1480 interrupt_sequence_break,
1481 interrupt_sequence_break_g,
1484 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
1487 show_interrupt_sequence (struct ui_file *file, int from_tty,
1488 struct cmd_list_element *c,
1491 if (interrupt_sequence_mode == interrupt_sequence_control_c)
1492 fprintf_filtered (file,
1493 _("Send the ASCII ETX character (Ctrl-c) "
1494 "to the remote target to interrupt the "
1495 "execution of the program.\n"));
1496 else if (interrupt_sequence_mode == interrupt_sequence_break)
1497 fprintf_filtered (file,
1498 _("send a break signal to the remote target "
1499 "to interrupt the execution of the program.\n"));
1500 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
1501 fprintf_filtered (file,
1502 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1503 "the remote target to interrupt the execution "
1504 "of Linux kernel.\n"));
1506 internal_error (__FILE__, __LINE__,
1507 _("Invalid value for interrupt_sequence_mode: %s."),
1508 interrupt_sequence_mode);
1511 /* This boolean variable specifies whether interrupt_sequence is sent
1512 to the remote target when gdb connects to it.
1513 This is mostly needed when you debug the Linux kernel: The Linux kernel
1514 expects BREAK g which is Magic SysRq g for connecting gdb. */
1515 static int interrupt_on_connect = 0;
1517 /* This variable is used to implement the "set/show remotebreak" commands.
1518 Since these commands are now deprecated in favor of "set/show remote
1519 interrupt-sequence", it no longer has any effect on the code. */
1520 static int remote_break;
1523 set_remotebreak (const char *args, int from_tty, struct cmd_list_element *c)
1526 interrupt_sequence_mode = interrupt_sequence_break;
1528 interrupt_sequence_mode = interrupt_sequence_control_c;
1532 show_remotebreak (struct ui_file *file, int from_tty,
1533 struct cmd_list_element *c,
1538 /* This variable sets the number of bits in an address that are to be
1539 sent in a memory ("M" or "m") packet. Normally, after stripping
1540 leading zeros, the entire address would be sent. This variable
1541 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1542 initial implementation of remote.c restricted the address sent in
1543 memory packets to ``host::sizeof long'' bytes - (typically 32
1544 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1545 address was never sent. Since fixing this bug may cause a break in
1546 some remote targets this variable is principly provided to
1547 facilitate backward compatibility. */
1549 static unsigned int remote_address_size;
1552 /* User configurable variables for the number of characters in a
1553 memory read/write packet. MIN (rsa->remote_packet_size,
1554 rsa->sizeof_g_packet) is the default. Some targets need smaller
1555 values (fifo overruns, et.al.) and some users need larger values
1556 (speed up transfers). The variables ``preferred_*'' (the user
1557 request), ``current_*'' (what was actually set) and ``forced_*''
1558 (Positive - a soft limit, negative - a hard limit). */
1560 struct memory_packet_config
1567 /* The default max memory-write-packet-size, when the setting is
1568 "fixed". The 16k is historical. (It came from older GDB's using
1569 alloca for buffers and the knowledge (folklore?) that some hosts
1570 don't cope very well with large alloca calls.) */
1571 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1573 /* The minimum remote packet size for memory transfers. Ensures we
1574 can write at least one byte. */
1575 #define MIN_MEMORY_PACKET_SIZE 20
1577 /* Get the memory packet size, assuming it is fixed. */
1580 get_fixed_memory_packet_size (struct memory_packet_config *config)
1582 gdb_assert (config->fixed_p);
1584 if (config->size <= 0)
1585 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED;
1587 return config->size;
1590 /* Compute the current size of a read/write packet. Since this makes
1591 use of ``actual_register_packet_size'' the computation is dynamic. */
1594 remote_target::get_memory_packet_size (struct memory_packet_config *config)
1596 struct remote_state *rs = get_remote_state ();
1597 remote_arch_state *rsa = rs->get_remote_arch_state (target_gdbarch ());
1600 if (config->fixed_p)
1601 what_they_get = get_fixed_memory_packet_size (config);
1604 what_they_get = get_remote_packet_size ();
1605 /* Limit the packet to the size specified by the user. */
1606 if (config->size > 0
1607 && what_they_get > config->size)
1608 what_they_get = config->size;
1610 /* Limit it to the size of the targets ``g'' response unless we have
1611 permission from the stub to use a larger packet size. */
1612 if (rs->explicit_packet_size == 0
1613 && rsa->actual_register_packet_size > 0
1614 && what_they_get > rsa->actual_register_packet_size)
1615 what_they_get = rsa->actual_register_packet_size;
1617 if (what_they_get < MIN_MEMORY_PACKET_SIZE)
1618 what_they_get = MIN_MEMORY_PACKET_SIZE;
1620 /* Make sure there is room in the global buffer for this packet
1621 (including its trailing NUL byte). */
1622 if (rs->buf.size () < what_they_get + 1)
1623 rs->buf.resize (2 * what_they_get);
1625 return what_they_get;
1628 /* Update the size of a read/write packet. If they user wants
1629 something really big then do a sanity check. */
1632 set_memory_packet_size (const char *args, struct memory_packet_config *config)
1634 int fixed_p = config->fixed_p;
1635 long size = config->size;
1638 error (_("Argument required (integer, `fixed' or `limited')."));
1639 else if (strcmp (args, "hard") == 0
1640 || strcmp (args, "fixed") == 0)
1642 else if (strcmp (args, "soft") == 0
1643 || strcmp (args, "limit") == 0)
1649 size = strtoul (args, &end, 0);
1651 error (_("Invalid %s (bad syntax)."), config->name);
1653 /* Instead of explicitly capping the size of a packet to or
1654 disallowing it, the user is allowed to set the size to
1655 something arbitrarily large. */
1659 if (fixed_p && !config->fixed_p)
1661 /* So that the query shows the correct value. */
1662 long query_size = (size <= 0
1663 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1666 if (! query (_("The target may not be able to correctly handle a %s\n"
1667 "of %ld bytes. Change the packet size? "),
1668 config->name, query_size))
1669 error (_("Packet size not changed."));
1671 /* Update the config. */
1672 config->fixed_p = fixed_p;
1673 config->size = size;
1677 show_memory_packet_size (struct memory_packet_config *config)
1679 if (config->size == 0)
1680 printf_filtered (_("The %s is 0 (default). "), config->name);
1682 printf_filtered (_("The %s is %ld. "), config->name, config->size);
1683 if (config->fixed_p)
1684 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1685 get_fixed_memory_packet_size (config));
1688 remote_target *remote = get_current_remote_target ();
1691 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1692 remote->get_memory_packet_size (config));
1694 puts_filtered ("The actual limit will be further reduced "
1695 "dependent on the target.\n");
1699 static struct memory_packet_config memory_write_packet_config =
1701 "memory-write-packet-size",
1705 set_memory_write_packet_size (const char *args, int from_tty)
1707 set_memory_packet_size (args, &memory_write_packet_config);
1711 show_memory_write_packet_size (const char *args, int from_tty)
1713 show_memory_packet_size (&memory_write_packet_config);
1716 /* Show the number of hardware watchpoints that can be used. */
1719 show_hardware_watchpoint_limit (struct ui_file *file, int from_tty,
1720 struct cmd_list_element *c,
1723 fprintf_filtered (file, _("The maximum number of target hardware "
1724 "watchpoints is %s.\n"), value);
1727 /* Show the length limit (in bytes) for hardware watchpoints. */
1730 show_hardware_watchpoint_length_limit (struct ui_file *file, int from_tty,
1731 struct cmd_list_element *c,
1734 fprintf_filtered (file, _("The maximum length (in bytes) of a target "
1735 "hardware watchpoint is %s.\n"), value);
1738 /* Show the number of hardware breakpoints that can be used. */
1741 show_hardware_breakpoint_limit (struct ui_file *file, int from_tty,
1742 struct cmd_list_element *c,
1745 fprintf_filtered (file, _("The maximum number of target hardware "
1746 "breakpoints is %s.\n"), value);
1750 remote_target::get_memory_write_packet_size ()
1752 return get_memory_packet_size (&memory_write_packet_config);
1755 static struct memory_packet_config memory_read_packet_config =
1757 "memory-read-packet-size",
1761 set_memory_read_packet_size (const char *args, int from_tty)
1763 set_memory_packet_size (args, &memory_read_packet_config);
1767 show_memory_read_packet_size (const char *args, int from_tty)
1769 show_memory_packet_size (&memory_read_packet_config);
1773 remote_target::get_memory_read_packet_size ()
1775 long size = get_memory_packet_size (&memory_read_packet_config);
1777 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1778 extra buffer size argument before the memory read size can be
1779 increased beyond this. */
1780 if (size > get_remote_packet_size ())
1781 size = get_remote_packet_size ();
1787 struct packet_config
1792 /* If auto, GDB auto-detects support for this packet or feature,
1793 either through qSupported, or by trying the packet and looking
1794 at the response. If true, GDB assumes the target supports this
1795 packet. If false, the packet is disabled. Configs that don't
1796 have an associated command always have this set to auto. */
1797 enum auto_boolean detect;
1799 /* Does the target support this packet? */
1800 enum packet_support support;
1803 static enum packet_support packet_config_support (struct packet_config *config);
1804 static enum packet_support packet_support (int packet);
1807 show_packet_config_cmd (struct packet_config *config)
1809 const char *support = "internal-error";
1811 switch (packet_config_support (config))
1814 support = "enabled";
1816 case PACKET_DISABLE:
1817 support = "disabled";
1819 case PACKET_SUPPORT_UNKNOWN:
1820 support = "unknown";
1823 switch (config->detect)
1825 case AUTO_BOOLEAN_AUTO:
1826 printf_filtered (_("Support for the `%s' packet "
1827 "is auto-detected, currently %s.\n"),
1828 config->name, support);
1830 case AUTO_BOOLEAN_TRUE:
1831 case AUTO_BOOLEAN_FALSE:
1832 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1833 config->name, support);
1839 add_packet_config_cmd (struct packet_config *config, const char *name,
1840 const char *title, int legacy)
1846 config->name = name;
1847 config->title = title;
1848 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1850 show_doc = xstrprintf ("Show current use of remote "
1851 "protocol `%s' (%s) packet",
1853 /* set/show TITLE-packet {auto,on,off} */
1854 cmd_name = xstrprintf ("%s-packet", title);
1855 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1856 &config->detect, set_doc,
1857 show_doc, NULL, /* help_doc */
1859 show_remote_protocol_packet_cmd,
1860 &remote_set_cmdlist, &remote_show_cmdlist);
1861 /* The command code copies the documentation strings. */
1864 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1869 legacy_name = xstrprintf ("%s-packet", name);
1870 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1871 &remote_set_cmdlist);
1872 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1873 &remote_show_cmdlist);
1877 static enum packet_result
1878 packet_check_result (const char *buf)
1882 /* The stub recognized the packet request. Check that the
1883 operation succeeded. */
1885 && isxdigit (buf[1]) && isxdigit (buf[2])
1887 /* "Enn" - definitly an error. */
1888 return PACKET_ERROR;
1890 /* Always treat "E." as an error. This will be used for
1891 more verbose error messages, such as E.memtypes. */
1892 if (buf[0] == 'E' && buf[1] == '.')
1893 return PACKET_ERROR;
1895 /* The packet may or may not be OK. Just assume it is. */
1899 /* The stub does not support the packet. */
1900 return PACKET_UNKNOWN;
1903 static enum packet_result
1904 packet_check_result (const gdb::char_vector &buf)
1906 return packet_check_result (buf.data ());
1909 static enum packet_result
1910 packet_ok (const char *buf, struct packet_config *config)
1912 enum packet_result result;
1914 if (config->detect != AUTO_BOOLEAN_TRUE
1915 && config->support == PACKET_DISABLE)
1916 internal_error (__FILE__, __LINE__,
1917 _("packet_ok: attempt to use a disabled packet"));
1919 result = packet_check_result (buf);
1924 /* The stub recognized the packet request. */
1925 if (config->support == PACKET_SUPPORT_UNKNOWN)
1928 fprintf_unfiltered (gdb_stdlog,
1929 "Packet %s (%s) is supported\n",
1930 config->name, config->title);
1931 config->support = PACKET_ENABLE;
1934 case PACKET_UNKNOWN:
1935 /* The stub does not support the packet. */
1936 if (config->detect == AUTO_BOOLEAN_AUTO
1937 && config->support == PACKET_ENABLE)
1939 /* If the stub previously indicated that the packet was
1940 supported then there is a protocol error. */
1941 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1942 config->name, config->title);
1944 else if (config->detect == AUTO_BOOLEAN_TRUE)
1946 /* The user set it wrong. */
1947 error (_("Enabled packet %s (%s) not recognized by stub"),
1948 config->name, config->title);
1952 fprintf_unfiltered (gdb_stdlog,
1953 "Packet %s (%s) is NOT supported\n",
1954 config->name, config->title);
1955 config->support = PACKET_DISABLE;
1962 static enum packet_result
1963 packet_ok (const gdb::char_vector &buf, struct packet_config *config)
1965 return packet_ok (buf.data (), config);
1982 PACKET_vFile_pwrite,
1984 PACKET_vFile_unlink,
1985 PACKET_vFile_readlink,
1988 PACKET_qXfer_features,
1989 PACKET_qXfer_exec_file,
1990 PACKET_qXfer_libraries,
1991 PACKET_qXfer_libraries_svr4,
1992 PACKET_qXfer_memory_map,
1993 PACKET_qXfer_spu_read,
1994 PACKET_qXfer_spu_write,
1995 PACKET_qXfer_osdata,
1996 PACKET_qXfer_threads,
1997 PACKET_qXfer_statictrace_read,
1998 PACKET_qXfer_traceframe_info,
2004 PACKET_QPassSignals,
2005 PACKET_QCatchSyscalls,
2006 PACKET_QProgramSignals,
2007 PACKET_QSetWorkingDir,
2008 PACKET_QStartupWithShell,
2009 PACKET_QEnvironmentHexEncoded,
2010 PACKET_QEnvironmentReset,
2011 PACKET_QEnvironmentUnset,
2013 PACKET_qSearch_memory,
2016 PACKET_QStartNoAckMode,
2018 PACKET_qXfer_siginfo_read,
2019 PACKET_qXfer_siginfo_write,
2022 /* Support for conditional tracepoints. */
2023 PACKET_ConditionalTracepoints,
2025 /* Support for target-side breakpoint conditions. */
2026 PACKET_ConditionalBreakpoints,
2028 /* Support for target-side breakpoint commands. */
2029 PACKET_BreakpointCommands,
2031 /* Support for fast tracepoints. */
2032 PACKET_FastTracepoints,
2034 /* Support for static tracepoints. */
2035 PACKET_StaticTracepoints,
2037 /* Support for installing tracepoints while a trace experiment is
2039 PACKET_InstallInTrace,
2043 PACKET_TracepointSource,
2046 PACKET_QDisableRandomization,
2048 PACKET_QTBuffer_size,
2052 PACKET_qXfer_btrace,
2054 /* Support for the QNonStop packet. */
2057 /* Support for the QThreadEvents packet. */
2058 PACKET_QThreadEvents,
2060 /* Support for multi-process extensions. */
2061 PACKET_multiprocess_feature,
2063 /* Support for enabling and disabling tracepoints while a trace
2064 experiment is running. */
2065 PACKET_EnableDisableTracepoints_feature,
2067 /* Support for collecting strings using the tracenz bytecode. */
2068 PACKET_tracenz_feature,
2070 /* Support for continuing to run a trace experiment while GDB is
2072 PACKET_DisconnectedTracing_feature,
2074 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2075 PACKET_augmented_libraries_svr4_read_feature,
2077 /* Support for the qXfer:btrace-conf:read packet. */
2078 PACKET_qXfer_btrace_conf,
2080 /* Support for the Qbtrace-conf:bts:size packet. */
2081 PACKET_Qbtrace_conf_bts_size,
2083 /* Support for swbreak+ feature. */
2084 PACKET_swbreak_feature,
2086 /* Support for hwbreak+ feature. */
2087 PACKET_hwbreak_feature,
2089 /* Support for fork events. */
2090 PACKET_fork_event_feature,
2092 /* Support for vfork events. */
2093 PACKET_vfork_event_feature,
2095 /* Support for the Qbtrace-conf:pt:size packet. */
2096 PACKET_Qbtrace_conf_pt_size,
2098 /* Support for exec events. */
2099 PACKET_exec_event_feature,
2101 /* Support for query supported vCont actions. */
2102 PACKET_vContSupported,
2104 /* Support remote CTRL-C. */
2107 /* Support TARGET_WAITKIND_NO_RESUMED. */
2113 static struct packet_config remote_protocol_packets[PACKET_MAX];
2115 /* Returns the packet's corresponding "set remote foo-packet" command
2116 state. See struct packet_config for more details. */
2118 static enum auto_boolean
2119 packet_set_cmd_state (int packet)
2121 return remote_protocol_packets[packet].detect;
2124 /* Returns whether a given packet or feature is supported. This takes
2125 into account the state of the corresponding "set remote foo-packet"
2126 command, which may be used to bypass auto-detection. */
2128 static enum packet_support
2129 packet_config_support (struct packet_config *config)
2131 switch (config->detect)
2133 case AUTO_BOOLEAN_TRUE:
2134 return PACKET_ENABLE;
2135 case AUTO_BOOLEAN_FALSE:
2136 return PACKET_DISABLE;
2137 case AUTO_BOOLEAN_AUTO:
2138 return config->support;
2140 gdb_assert_not_reached (_("bad switch"));
2144 /* Same as packet_config_support, but takes the packet's enum value as
2147 static enum packet_support
2148 packet_support (int packet)
2150 struct packet_config *config = &remote_protocol_packets[packet];
2152 return packet_config_support (config);
2156 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
2157 struct cmd_list_element *c,
2160 struct packet_config *packet;
2162 for (packet = remote_protocol_packets;
2163 packet < &remote_protocol_packets[PACKET_MAX];
2166 if (&packet->detect == c->var)
2168 show_packet_config_cmd (packet);
2172 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
2176 /* Should we try one of the 'Z' requests? */
2180 Z_PACKET_SOFTWARE_BP,
2181 Z_PACKET_HARDWARE_BP,
2188 /* For compatibility with older distributions. Provide a ``set remote
2189 Z-packet ...'' command that updates all the Z packet types. */
2191 static enum auto_boolean remote_Z_packet_detect;
2194 set_remote_protocol_Z_packet_cmd (const char *args, int from_tty,
2195 struct cmd_list_element *c)
2199 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
2200 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
2204 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
2205 struct cmd_list_element *c,
2210 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
2212 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
2216 /* Returns true if the multi-process extensions are in effect. */
2219 remote_multi_process_p (struct remote_state *rs)
2221 return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE;
2224 /* Returns true if fork events are supported. */
2227 remote_fork_event_p (struct remote_state *rs)
2229 return packet_support (PACKET_fork_event_feature) == PACKET_ENABLE;
2232 /* Returns true if vfork events are supported. */
2235 remote_vfork_event_p (struct remote_state *rs)
2237 return packet_support (PACKET_vfork_event_feature) == PACKET_ENABLE;
2240 /* Returns true if exec events are supported. */
2243 remote_exec_event_p (struct remote_state *rs)
2245 return packet_support (PACKET_exec_event_feature) == PACKET_ENABLE;
2248 /* Insert fork catchpoint target routine. If fork events are enabled
2249 then return success, nothing more to do. */
2252 remote_target::insert_fork_catchpoint (int pid)
2254 struct remote_state *rs = get_remote_state ();
2256 return !remote_fork_event_p (rs);
2259 /* Remove fork catchpoint target routine. Nothing to do, just
2263 remote_target::remove_fork_catchpoint (int pid)
2268 /* Insert vfork catchpoint target routine. If vfork events are enabled
2269 then return success, nothing more to do. */
2272 remote_target::insert_vfork_catchpoint (int pid)
2274 struct remote_state *rs = get_remote_state ();
2276 return !remote_vfork_event_p (rs);
2279 /* Remove vfork catchpoint target routine. Nothing to do, just
2283 remote_target::remove_vfork_catchpoint (int pid)
2288 /* Insert exec catchpoint target routine. If exec events are
2289 enabled, just return success. */
2292 remote_target::insert_exec_catchpoint (int pid)
2294 struct remote_state *rs = get_remote_state ();
2296 return !remote_exec_event_p (rs);
2299 /* Remove exec catchpoint target routine. Nothing to do, just
2303 remote_target::remove_exec_catchpoint (int pid)
2310 static ptid_t magic_null_ptid;
2311 static ptid_t not_sent_ptid;
2312 static ptid_t any_thread_ptid;
2314 /* Find out if the stub attached to PID (and hence GDB should offer to
2315 detach instead of killing it when bailing out). */
2318 remote_target::remote_query_attached (int pid)
2320 struct remote_state *rs = get_remote_state ();
2321 size_t size = get_remote_packet_size ();
2323 if (packet_support (PACKET_qAttached) == PACKET_DISABLE)
2326 if (remote_multi_process_p (rs))
2327 xsnprintf (rs->buf.data (), size, "qAttached:%x", pid);
2329 xsnprintf (rs->buf.data (), size, "qAttached");
2332 getpkt (&rs->buf, 0);
2334 switch (packet_ok (rs->buf,
2335 &remote_protocol_packets[PACKET_qAttached]))
2338 if (strcmp (rs->buf.data (), "1") == 0)
2342 warning (_("Remote failure reply: %s"), rs->buf.data ());
2344 case PACKET_UNKNOWN:
2351 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2352 has been invented by GDB, instead of reported by the target. Since
2353 we can be connected to a remote system before before knowing about
2354 any inferior, mark the target with execution when we find the first
2355 inferior. If ATTACHED is 1, then we had just attached to this
2356 inferior. If it is 0, then we just created this inferior. If it
2357 is -1, then try querying the remote stub to find out if it had
2358 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2359 attempt to open this inferior's executable as the main executable
2360 if no main executable is open already. */
2363 remote_target::remote_add_inferior (int fake_pid_p, int pid, int attached,
2366 struct inferior *inf;
2368 /* Check whether this process we're learning about is to be
2369 considered attached, or if is to be considered to have been
2370 spawned by the stub. */
2372 attached = remote_query_attached (pid);
2374 if (gdbarch_has_global_solist (target_gdbarch ()))
2376 /* If the target shares code across all inferiors, then every
2377 attach adds a new inferior. */
2378 inf = add_inferior (pid);
2380 /* ... and every inferior is bound to the same program space.
2381 However, each inferior may still have its own address
2383 inf->aspace = maybe_new_address_space ();
2384 inf->pspace = current_program_space;
2388 /* In the traditional debugging scenario, there's a 1-1 match
2389 between program/address spaces. We simply bind the inferior
2390 to the program space's address space. */
2391 inf = current_inferior ();
2392 inferior_appeared (inf, pid);
2395 inf->attach_flag = attached;
2396 inf->fake_pid_p = fake_pid_p;
2398 /* If no main executable is currently open then attempt to
2399 open the file that was executed to create this inferior. */
2400 if (try_open_exec && get_exec_file (0) == NULL)
2401 exec_file_locate_attach (pid, 0, 1);
2406 static remote_thread_info *get_remote_thread_info (thread_info *thread);
2407 static remote_thread_info *get_remote_thread_info (ptid_t ptid);
2409 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2410 according to RUNNING. */
2413 remote_target::remote_add_thread (ptid_t ptid, bool running, bool executing)
2415 struct remote_state *rs = get_remote_state ();
2416 struct thread_info *thread;
2418 /* GDB historically didn't pull threads in the initial connection
2419 setup. If the remote target doesn't even have a concept of
2420 threads (e.g., a bare-metal target), even if internally we
2421 consider that a single-threaded target, mentioning a new thread
2422 might be confusing to the user. Be silent then, preserving the
2423 age old behavior. */
2424 if (rs->starting_up)
2425 thread = add_thread_silent (ptid);
2427 thread = add_thread (ptid);
2429 get_remote_thread_info (thread)->vcont_resumed = executing;
2430 set_executing (ptid, executing);
2431 set_running (ptid, running);
2436 /* Come here when we learn about a thread id from the remote target.
2437 It may be the first time we hear about such thread, so take the
2438 opportunity to add it to GDB's thread list. In case this is the
2439 first time we're noticing its corresponding inferior, add it to
2440 GDB's inferior list as well. EXECUTING indicates whether the
2441 thread is (internally) executing or stopped. */
2444 remote_target::remote_notice_new_inferior (ptid_t currthread, int executing)
2446 /* In non-stop mode, we assume new found threads are (externally)
2447 running until proven otherwise with a stop reply. In all-stop,
2448 we can only get here if all threads are stopped. */
2449 int running = target_is_non_stop_p () ? 1 : 0;
2451 /* If this is a new thread, add it to GDB's thread list.
2452 If we leave it up to WFI to do this, bad things will happen. */
2454 thread_info *tp = find_thread_ptid (currthread);
2455 if (tp != NULL && tp->state == THREAD_EXITED)
2457 /* We're seeing an event on a thread id we knew had exited.
2458 This has to be a new thread reusing the old id. Add it. */
2459 remote_add_thread (currthread, running, executing);
2463 if (!in_thread_list (currthread))
2465 struct inferior *inf = NULL;
2466 int pid = currthread.pid ();
2468 if (inferior_ptid.is_pid ()
2469 && pid == inferior_ptid.pid ())
2471 /* inferior_ptid has no thread member yet. This can happen
2472 with the vAttach -> remote_wait,"TAAthread:" path if the
2473 stub doesn't support qC. This is the first stop reported
2474 after an attach, so this is the main thread. Update the
2475 ptid in the thread list. */
2476 if (in_thread_list (ptid_t (pid)))
2477 thread_change_ptid (inferior_ptid, currthread);
2480 remote_add_thread (currthread, running, executing);
2481 inferior_ptid = currthread;
2486 if (magic_null_ptid == inferior_ptid)
2488 /* inferior_ptid is not set yet. This can happen with the
2489 vRun -> remote_wait,"TAAthread:" path if the stub
2490 doesn't support qC. This is the first stop reported
2491 after an attach, so this is the main thread. Update the
2492 ptid in the thread list. */
2493 thread_change_ptid (inferior_ptid, currthread);
2497 /* When connecting to a target remote, or to a target
2498 extended-remote which already was debugging an inferior, we
2499 may not know about it yet. Add it before adding its child
2500 thread, so notifications are emitted in a sensible order. */
2501 if (find_inferior_pid (currthread.pid ()) == NULL)
2503 struct remote_state *rs = get_remote_state ();
2504 int fake_pid_p = !remote_multi_process_p (rs);
2506 inf = remote_add_inferior (fake_pid_p,
2507 currthread.pid (), -1, 1);
2510 /* This is really a new thread. Add it. */
2511 thread_info *new_thr
2512 = remote_add_thread (currthread, running, executing);
2514 /* If we found a new inferior, let the common code do whatever
2515 it needs to with it (e.g., read shared libraries, insert
2516 breakpoints), unless we're just setting up an all-stop
2520 struct remote_state *rs = get_remote_state ();
2522 if (!rs->starting_up)
2523 notice_new_inferior (new_thr, executing, 0);
2528 /* Return THREAD's private thread data, creating it if necessary. */
2530 static remote_thread_info *
2531 get_remote_thread_info (thread_info *thread)
2533 gdb_assert (thread != NULL);
2535 if (thread->priv == NULL)
2536 thread->priv.reset (new remote_thread_info);
2538 return static_cast<remote_thread_info *> (thread->priv.get ());
2541 static remote_thread_info *
2542 get_remote_thread_info (ptid_t ptid)
2544 thread_info *thr = find_thread_ptid (ptid);
2545 return get_remote_thread_info (thr);
2548 /* Call this function as a result of
2549 1) A halt indication (T packet) containing a thread id
2550 2) A direct query of currthread
2551 3) Successful execution of set thread */
2554 record_currthread (struct remote_state *rs, ptid_t currthread)
2556 rs->general_thread = currthread;
2559 /* If 'QPassSignals' is supported, tell the remote stub what signals
2560 it can simply pass through to the inferior without reporting. */
2563 remote_target::pass_signals (gdb::array_view<const unsigned char> pass_signals)
2565 if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE)
2567 char *pass_packet, *p;
2569 struct remote_state *rs = get_remote_state ();
2571 gdb_assert (pass_signals.size () < 256);
2572 for (size_t i = 0; i < pass_signals.size (); i++)
2574 if (pass_signals[i])
2577 pass_packet = (char *) xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
2578 strcpy (pass_packet, "QPassSignals:");
2579 p = pass_packet + strlen (pass_packet);
2580 for (size_t i = 0; i < pass_signals.size (); i++)
2582 if (pass_signals[i])
2585 *p++ = tohex (i >> 4);
2586 *p++ = tohex (i & 15);
2595 if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet))
2597 putpkt (pass_packet);
2598 getpkt (&rs->buf, 0);
2599 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]);
2600 if (rs->last_pass_packet)
2601 xfree (rs->last_pass_packet);
2602 rs->last_pass_packet = pass_packet;
2605 xfree (pass_packet);
2609 /* If 'QCatchSyscalls' is supported, tell the remote stub
2610 to report syscalls to GDB. */
2613 remote_target::set_syscall_catchpoint (int pid, bool needed, int any_count,
2614 gdb::array_view<const int> syscall_counts)
2616 const char *catch_packet;
2617 enum packet_result result;
2620 if (packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE)
2622 /* Not supported. */
2626 if (needed && any_count == 0)
2628 /* Count how many syscalls are to be caught. */
2629 for (size_t i = 0; i < syscall_counts.size (); i++)
2631 if (syscall_counts[i] != 0)
2638 fprintf_unfiltered (gdb_stdlog,
2639 "remote_set_syscall_catchpoint "
2640 "pid %d needed %d any_count %d n_sysno %d\n",
2641 pid, needed, any_count, n_sysno);
2644 std::string built_packet;
2647 /* Prepare a packet with the sysno list, assuming max 8+1
2648 characters for a sysno. If the resulting packet size is too
2649 big, fallback on the non-selective packet. */
2650 const int maxpktsz = strlen ("QCatchSyscalls:1") + n_sysno * 9 + 1;
2651 built_packet.reserve (maxpktsz);
2652 built_packet = "QCatchSyscalls:1";
2655 /* Add in each syscall to be caught. */
2656 for (size_t i = 0; i < syscall_counts.size (); i++)
2658 if (syscall_counts[i] != 0)
2659 string_appendf (built_packet, ";%zx", i);
2662 if (built_packet.size () > get_remote_packet_size ())
2664 /* catch_packet too big. Fallback to less efficient
2665 non selective mode, with GDB doing the filtering. */
2666 catch_packet = "QCatchSyscalls:1";
2669 catch_packet = built_packet.c_str ();
2672 catch_packet = "QCatchSyscalls:0";
2674 struct remote_state *rs = get_remote_state ();
2676 putpkt (catch_packet);
2677 getpkt (&rs->buf, 0);
2678 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_QCatchSyscalls]);
2679 if (result == PACKET_OK)
2685 /* If 'QProgramSignals' is supported, tell the remote stub what
2686 signals it should pass through to the inferior when detaching. */
2689 remote_target::program_signals (gdb::array_view<const unsigned char> signals)
2691 if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE)
2695 struct remote_state *rs = get_remote_state ();
2697 gdb_assert (signals.size () < 256);
2698 for (size_t i = 0; i < signals.size (); i++)
2703 packet = (char *) xmalloc (count * 3 + strlen ("QProgramSignals:") + 1);
2704 strcpy (packet, "QProgramSignals:");
2705 p = packet + strlen (packet);
2706 for (size_t i = 0; i < signals.size (); i++)
2708 if (signal_pass_state (i))
2711 *p++ = tohex (i >> 4);
2712 *p++ = tohex (i & 15);
2721 if (!rs->last_program_signals_packet
2722 || strcmp (rs->last_program_signals_packet, packet) != 0)
2725 getpkt (&rs->buf, 0);
2726 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]);
2727 xfree (rs->last_program_signals_packet);
2728 rs->last_program_signals_packet = packet;
2735 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2736 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2737 thread. If GEN is set, set the general thread, if not, then set
2738 the step/continue thread. */
2740 remote_target::set_thread (ptid_t ptid, int gen)
2742 struct remote_state *rs = get_remote_state ();
2743 ptid_t state = gen ? rs->general_thread : rs->continue_thread;
2744 char *buf = rs->buf.data ();
2745 char *endbuf = buf + get_remote_packet_size ();
2751 *buf++ = gen ? 'g' : 'c';
2752 if (ptid == magic_null_ptid)
2753 xsnprintf (buf, endbuf - buf, "0");
2754 else if (ptid == any_thread_ptid)
2755 xsnprintf (buf, endbuf - buf, "0");
2756 else if (ptid == minus_one_ptid)
2757 xsnprintf (buf, endbuf - buf, "-1");
2759 write_ptid (buf, endbuf, ptid);
2761 getpkt (&rs->buf, 0);
2763 rs->general_thread = ptid;
2765 rs->continue_thread = ptid;
2769 remote_target::set_general_thread (ptid_t ptid)
2771 set_thread (ptid, 1);
2775 remote_target::set_continue_thread (ptid_t ptid)
2777 set_thread (ptid, 0);
2780 /* Change the remote current process. Which thread within the process
2781 ends up selected isn't important, as long as it is the same process
2782 as what INFERIOR_PTID points to.
2784 This comes from that fact that there is no explicit notion of
2785 "selected process" in the protocol. The selected process for
2786 general operations is the process the selected general thread
2790 remote_target::set_general_process ()
2792 struct remote_state *rs = get_remote_state ();
2794 /* If the remote can't handle multiple processes, don't bother. */
2795 if (!remote_multi_process_p (rs))
2798 /* We only need to change the remote current thread if it's pointing
2799 at some other process. */
2800 if (rs->general_thread.pid () != inferior_ptid.pid ())
2801 set_general_thread (inferior_ptid);
2805 /* Return nonzero if this is the main thread that we made up ourselves
2806 to model non-threaded targets as single-threaded. */
2809 remote_thread_always_alive (ptid_t ptid)
2811 if (ptid == magic_null_ptid)
2812 /* The main thread is always alive. */
2815 if (ptid.pid () != 0 && ptid.lwp () == 0)
2816 /* The main thread is always alive. This can happen after a
2817 vAttach, if the remote side doesn't support
2824 /* Return nonzero if the thread PTID is still alive on the remote
2828 remote_target::thread_alive (ptid_t ptid)
2830 struct remote_state *rs = get_remote_state ();
2833 /* Check if this is a thread that we made up ourselves to model
2834 non-threaded targets as single-threaded. */
2835 if (remote_thread_always_alive (ptid))
2838 p = rs->buf.data ();
2839 endp = p + get_remote_packet_size ();
2842 write_ptid (p, endp, ptid);
2845 getpkt (&rs->buf, 0);
2846 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
2849 /* Return a pointer to a thread name if we know it and NULL otherwise.
2850 The thread_info object owns the memory for the name. */
2853 remote_target::thread_name (struct thread_info *info)
2855 if (info->priv != NULL)
2857 const std::string &name = get_remote_thread_info (info)->name;
2858 return !name.empty () ? name.c_str () : NULL;
2864 /* About these extended threadlist and threadinfo packets. They are
2865 variable length packets but, the fields within them are often fixed
2866 length. They are redundent enough to send over UDP as is the
2867 remote protocol in general. There is a matching unit test module
2870 /* WARNING: This threadref data structure comes from the remote O.S.,
2871 libstub protocol encoding, and remote.c. It is not particularly
2874 /* Right now, the internal structure is int. We want it to be bigger.
2875 Plan to fix this. */
2877 typedef int gdb_threadref; /* Internal GDB thread reference. */
2879 /* gdb_ext_thread_info is an internal GDB data structure which is
2880 equivalent to the reply of the remote threadinfo packet. */
2882 struct gdb_ext_thread_info
2884 threadref threadid; /* External form of thread reference. */
2885 int active; /* Has state interesting to GDB?
2887 char display[256]; /* Brief state display, name,
2888 blocked/suspended. */
2889 char shortname[32]; /* To be used to name threads. */
2890 char more_display[256]; /* Long info, statistics, queue depth,
2894 /* The volume of remote transfers can be limited by submitting
2895 a mask containing bits specifying the desired information.
2896 Use a union of these values as the 'selection' parameter to
2897 get_thread_info. FIXME: Make these TAG names more thread specific. */
2899 #define TAG_THREADID 1
2900 #define TAG_EXISTS 2
2901 #define TAG_DISPLAY 4
2902 #define TAG_THREADNAME 8
2903 #define TAG_MOREDISPLAY 16
2905 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2907 static char *unpack_nibble (char *buf, int *val);
2909 static char *unpack_byte (char *buf, int *value);
2911 static char *pack_int (char *buf, int value);
2913 static char *unpack_int (char *buf, int *value);
2915 static char *unpack_string (char *src, char *dest, int length);
2917 static char *pack_threadid (char *pkt, threadref *id);
2919 static char *unpack_threadid (char *inbuf, threadref *id);
2921 void int_to_threadref (threadref *id, int value);
2923 static int threadref_to_int (threadref *ref);
2925 static void copy_threadref (threadref *dest, threadref *src);
2927 static int threadmatch (threadref *dest, threadref *src);
2929 static char *pack_threadinfo_request (char *pkt, int mode,
2932 static char *pack_threadlist_request (char *pkt, int startflag,
2934 threadref *nextthread);
2936 static int remote_newthread_step (threadref *ref, void *context);
2939 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2940 buffer we're allowed to write to. Returns
2941 BUF+CHARACTERS_WRITTEN. */
2944 remote_target::write_ptid (char *buf, const char *endbuf, ptid_t ptid)
2947 struct remote_state *rs = get_remote_state ();
2949 if (remote_multi_process_p (rs))
2953 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
2955 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
2959 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
2961 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
2966 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2967 last parsed char. Returns null_ptid if no thread id is found, and
2968 throws an error if the thread id has an invalid format. */
2971 read_ptid (const char *buf, const char **obuf)
2973 const char *p = buf;
2975 ULONGEST pid = 0, tid = 0;
2979 /* Multi-process ptid. */
2980 pp = unpack_varlen_hex (p + 1, &pid);
2982 error (_("invalid remote ptid: %s"), p);
2985 pp = unpack_varlen_hex (p + 1, &tid);
2988 return ptid_t (pid, tid, 0);
2991 /* No multi-process. Just a tid. */
2992 pp = unpack_varlen_hex (p, &tid);
2994 /* Return null_ptid when no thread id is found. */
3002 /* Since the stub is not sending a process id, then default to
3003 what's in inferior_ptid, unless it's null at this point. If so,
3004 then since there's no way to know the pid of the reported
3005 threads, use the magic number. */
3006 if (inferior_ptid == null_ptid)
3007 pid = magic_null_ptid.pid ();
3009 pid = inferior_ptid.pid ();
3013 return ptid_t (pid, tid, 0);
3019 if (ch >= 'a' && ch <= 'f')
3020 return ch - 'a' + 10;
3021 if (ch >= '0' && ch <= '9')
3023 if (ch >= 'A' && ch <= 'F')
3024 return ch - 'A' + 10;
3029 stub_unpack_int (char *buff, int fieldlength)
3036 nibble = stubhex (*buff++);
3040 retval = retval << 4;
3046 unpack_nibble (char *buf, int *val)
3048 *val = fromhex (*buf++);
3053 unpack_byte (char *buf, int *value)
3055 *value = stub_unpack_int (buf, 2);
3060 pack_int (char *buf, int value)
3062 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
3063 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
3064 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
3065 buf = pack_hex_byte (buf, (value & 0xff));
3070 unpack_int (char *buf, int *value)
3072 *value = stub_unpack_int (buf, 8);
3076 #if 0 /* Currently unused, uncomment when needed. */
3077 static char *pack_string (char *pkt, char *string);
3080 pack_string (char *pkt, char *string)
3085 len = strlen (string);
3087 len = 200; /* Bigger than most GDB packets, junk??? */
3088 pkt = pack_hex_byte (pkt, len);
3092 if ((ch == '\0') || (ch == '#'))
3093 ch = '*'; /* Protect encapsulation. */
3098 #endif /* 0 (unused) */
3101 unpack_string (char *src, char *dest, int length)
3110 pack_threadid (char *pkt, threadref *id)
3113 unsigned char *altid;
3115 altid = (unsigned char *) id;
3116 limit = pkt + BUF_THREAD_ID_SIZE;
3118 pkt = pack_hex_byte (pkt, *altid++);
3124 unpack_threadid (char *inbuf, threadref *id)
3127 char *limit = inbuf + BUF_THREAD_ID_SIZE;
3130 altref = (char *) id;
3132 while (inbuf < limit)
3134 x = stubhex (*inbuf++);
3135 y = stubhex (*inbuf++);
3136 *altref++ = (x << 4) | y;
3141 /* Externally, threadrefs are 64 bits but internally, they are still
3142 ints. This is due to a mismatch of specifications. We would like
3143 to use 64bit thread references internally. This is an adapter
3147 int_to_threadref (threadref *id, int value)
3149 unsigned char *scan;
3151 scan = (unsigned char *) id;
3157 *scan++ = (value >> 24) & 0xff;
3158 *scan++ = (value >> 16) & 0xff;
3159 *scan++ = (value >> 8) & 0xff;
3160 *scan++ = (value & 0xff);
3164 threadref_to_int (threadref *ref)
3167 unsigned char *scan;
3173 value = (value << 8) | ((*scan++) & 0xff);
3178 copy_threadref (threadref *dest, threadref *src)
3181 unsigned char *csrc, *cdest;
3183 csrc = (unsigned char *) src;
3184 cdest = (unsigned char *) dest;
3191 threadmatch (threadref *dest, threadref *src)
3193 /* Things are broken right now, so just assume we got a match. */
3195 unsigned char *srcp, *destp;
3197 srcp = (char *) src;
3198 destp = (char *) dest;
3202 result &= (*srcp++ == *destp++) ? 1 : 0;
3209 threadid:1, # always request threadid
3216 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3219 pack_threadinfo_request (char *pkt, int mode, threadref *id)
3221 *pkt++ = 'q'; /* Info Query */
3222 *pkt++ = 'P'; /* process or thread info */
3223 pkt = pack_int (pkt, mode); /* mode */
3224 pkt = pack_threadid (pkt, id); /* threadid */
3225 *pkt = '\0'; /* terminate */
3229 /* These values tag the fields in a thread info response packet. */
3230 /* Tagging the fields allows us to request specific fields and to
3231 add more fields as time goes by. */
3233 #define TAG_THREADID 1 /* Echo the thread identifier. */
3234 #define TAG_EXISTS 2 /* Is this process defined enough to
3235 fetch registers and its stack? */
3236 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3237 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3238 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3242 remote_target::remote_unpack_thread_info_response (char *pkt,
3243 threadref *expectedref,
3244 gdb_ext_thread_info *info)
3246 struct remote_state *rs = get_remote_state ();
3250 char *limit = pkt + rs->buf.size (); /* Plausible parsing limit. */
3253 /* info->threadid = 0; FIXME: implement zero_threadref. */
3255 info->display[0] = '\0';
3256 info->shortname[0] = '\0';
3257 info->more_display[0] = '\0';
3259 /* Assume the characters indicating the packet type have been
3261 pkt = unpack_int (pkt, &mask); /* arg mask */
3262 pkt = unpack_threadid (pkt, &ref);
3265 warning (_("Incomplete response to threadinfo request."));
3266 if (!threadmatch (&ref, expectedref))
3267 { /* This is an answer to a different request. */
3268 warning (_("ERROR RMT Thread info mismatch."));
3271 copy_threadref (&info->threadid, &ref);
3273 /* Loop on tagged fields , try to bail if somthing goes wrong. */
3275 /* Packets are terminated with nulls. */
3276 while ((pkt < limit) && mask && *pkt)
3278 pkt = unpack_int (pkt, &tag); /* tag */
3279 pkt = unpack_byte (pkt, &length); /* length */
3280 if (!(tag & mask)) /* Tags out of synch with mask. */
3282 warning (_("ERROR RMT: threadinfo tag mismatch."));
3286 if (tag == TAG_THREADID)
3290 warning (_("ERROR RMT: length of threadid is not 16."));
3294 pkt = unpack_threadid (pkt, &ref);
3295 mask = mask & ~TAG_THREADID;
3298 if (tag == TAG_EXISTS)
3300 info->active = stub_unpack_int (pkt, length);
3302 mask = mask & ~(TAG_EXISTS);
3305 warning (_("ERROR RMT: 'exists' length too long."));
3311 if (tag == TAG_THREADNAME)
3313 pkt = unpack_string (pkt, &info->shortname[0], length);
3314 mask = mask & ~TAG_THREADNAME;
3317 if (tag == TAG_DISPLAY)
3319 pkt = unpack_string (pkt, &info->display[0], length);
3320 mask = mask & ~TAG_DISPLAY;
3323 if (tag == TAG_MOREDISPLAY)
3325 pkt = unpack_string (pkt, &info->more_display[0], length);
3326 mask = mask & ~TAG_MOREDISPLAY;
3329 warning (_("ERROR RMT: unknown thread info tag."));
3330 break; /* Not a tag we know about. */
3336 remote_target::remote_get_threadinfo (threadref *threadid,
3338 gdb_ext_thread_info *info)
3340 struct remote_state *rs = get_remote_state ();
3343 pack_threadinfo_request (rs->buf.data (), fieldset, threadid);
3345 getpkt (&rs->buf, 0);
3347 if (rs->buf[0] == '\0')
3350 result = remote_unpack_thread_info_response (&rs->buf[2],
3355 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3358 pack_threadlist_request (char *pkt, int startflag, int threadcount,
3359 threadref *nextthread)
3361 *pkt++ = 'q'; /* info query packet */
3362 *pkt++ = 'L'; /* Process LIST or threadLIST request */
3363 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
3364 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
3365 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
3370 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3373 remote_target::parse_threadlist_response (char *pkt, int result_limit,
3374 threadref *original_echo,
3375 threadref *resultlist,
3378 struct remote_state *rs = get_remote_state ();
3380 int count, resultcount, done;
3383 /* Assume the 'q' and 'M chars have been stripped. */
3384 limit = pkt + (rs->buf.size () - BUF_THREAD_ID_SIZE);
3385 /* done parse past here */
3386 pkt = unpack_byte (pkt, &count); /* count field */
3387 pkt = unpack_nibble (pkt, &done);
3388 /* The first threadid is the argument threadid. */
3389 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
3390 while ((count-- > 0) && (pkt < limit))
3392 pkt = unpack_threadid (pkt, resultlist++);
3393 if (resultcount++ >= result_limit)
3401 /* Fetch the next batch of threads from the remote. Returns -1 if the
3402 qL packet is not supported, 0 on error and 1 on success. */
3405 remote_target::remote_get_threadlist (int startflag, threadref *nextthread,
3406 int result_limit, int *done, int *result_count,
3407 threadref *threadlist)
3409 struct remote_state *rs = get_remote_state ();
3412 /* Trancate result limit to be smaller than the packet size. */
3413 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10)
3414 >= get_remote_packet_size ())
3415 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
3417 pack_threadlist_request (rs->buf.data (), startflag, result_limit,
3420 getpkt (&rs->buf, 0);
3421 if (rs->buf[0] == '\0')
3423 /* Packet not supported. */
3428 parse_threadlist_response (&rs->buf[2], result_limit,
3429 &rs->echo_nextthread, threadlist, done);
3431 if (!threadmatch (&rs->echo_nextthread, nextthread))
3433 /* FIXME: This is a good reason to drop the packet. */
3434 /* Possably, there is a duplicate response. */
3436 retransmit immediatly - race conditions
3437 retransmit after timeout - yes
3439 wait for packet, then exit
3441 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3442 return 0; /* I choose simply exiting. */
3444 if (*result_count <= 0)
3448 warning (_("RMT ERROR : failed to get remote thread list."));
3451 return result; /* break; */
3453 if (*result_count > result_limit)
3456 warning (_("RMT ERROR: threadlist response longer than requested."));
3462 /* Fetch the list of remote threads, with the qL packet, and call
3463 STEPFUNCTION for each thread found. Stops iterating and returns 1
3464 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3465 STEPFUNCTION returns false. If the packet is not supported,
3469 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction,
3470 void *context, int looplimit)
3472 struct remote_state *rs = get_remote_state ();
3473 int done, i, result_count;
3481 if (loopcount++ > looplimit)
3484 warning (_("Remote fetch threadlist -infinite loop-."));
3487 result = remote_get_threadlist (startflag, &rs->nextthread,
3488 MAXTHREADLISTRESULTS,
3489 &done, &result_count,
3490 rs->resultthreadlist);
3493 /* Clear for later iterations. */
3495 /* Setup to resume next batch of thread references, set nextthread. */
3496 if (result_count >= 1)
3497 copy_threadref (&rs->nextthread,
3498 &rs->resultthreadlist[result_count - 1]);
3500 while (result_count--)
3502 if (!(*stepfunction) (&rs->resultthreadlist[i++], context))
3512 /* A thread found on the remote target. */
3516 explicit thread_item (ptid_t ptid_)
3520 thread_item (thread_item &&other) = default;
3521 thread_item &operator= (thread_item &&other) = default;
3523 DISABLE_COPY_AND_ASSIGN (thread_item);
3525 /* The thread's PTID. */
3528 /* The thread's extra info. */
3531 /* The thread's name. */
3534 /* The core the thread was running on. -1 if not known. */
3537 /* The thread handle associated with the thread. */
3538 gdb::byte_vector thread_handle;
3541 /* Context passed around to the various methods listing remote
3542 threads. As new threads are found, they're added to the ITEMS
3545 struct threads_listing_context
3547 /* Return true if this object contains an entry for a thread with ptid
3550 bool contains_thread (ptid_t ptid) const
3552 auto match_ptid = [&] (const thread_item &item)
3554 return item.ptid == ptid;
3557 auto it = std::find_if (this->items.begin (),
3561 return it != this->items.end ();
3564 /* Remove the thread with ptid PTID. */
3566 void remove_thread (ptid_t ptid)
3568 auto match_ptid = [&] (const thread_item &item)
3570 return item.ptid == ptid;
3573 auto it = std::remove_if (this->items.begin (),
3577 if (it != this->items.end ())
3578 this->items.erase (it);
3581 /* The threads found on the remote target. */
3582 std::vector<thread_item> items;
3586 remote_newthread_step (threadref *ref, void *data)
3588 struct threads_listing_context *context
3589 = (struct threads_listing_context *) data;
3590 int pid = inferior_ptid.pid ();
3591 int lwp = threadref_to_int (ref);
3592 ptid_t ptid (pid, lwp);
3594 context->items.emplace_back (ptid);
3596 return 1; /* continue iterator */
3599 #define CRAZY_MAX_THREADS 1000
3602 remote_target::remote_current_thread (ptid_t oldpid)
3604 struct remote_state *rs = get_remote_state ();
3607 getpkt (&rs->buf, 0);
3608 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
3613 result = read_ptid (&rs->buf[2], &obuf);
3614 if (*obuf != '\0' && remote_debug)
3615 fprintf_unfiltered (gdb_stdlog,
3616 "warning: garbage in qC reply\n");
3624 /* List remote threads using the deprecated qL packet. */
3627 remote_target::remote_get_threads_with_ql (threads_listing_context *context)
3629 if (remote_threadlist_iterator (remote_newthread_step, context,
3630 CRAZY_MAX_THREADS) >= 0)
3636 #if defined(HAVE_LIBEXPAT)
3639 start_thread (struct gdb_xml_parser *parser,
3640 const struct gdb_xml_element *element,
3642 std::vector<gdb_xml_value> &attributes)
3644 struct threads_listing_context *data
3645 = (struct threads_listing_context *) user_data;
3646 struct gdb_xml_value *attr;
3648 char *id = (char *) xml_find_attribute (attributes, "id")->value.get ();
3649 ptid_t ptid = read_ptid (id, NULL);
3651 data->items.emplace_back (ptid);
3652 thread_item &item = data->items.back ();
3654 attr = xml_find_attribute (attributes, "core");
3656 item.core = *(ULONGEST *) attr->value.get ();
3658 attr = xml_find_attribute (attributes, "name");
3660 item.name = (const char *) attr->value.get ();
3662 attr = xml_find_attribute (attributes, "handle");
3664 item.thread_handle = hex2bin ((const char *) attr->value.get ());
3668 end_thread (struct gdb_xml_parser *parser,
3669 const struct gdb_xml_element *element,
3670 void *user_data, const char *body_text)
3672 struct threads_listing_context *data
3673 = (struct threads_listing_context *) user_data;
3675 if (body_text != NULL && *body_text != '\0')
3676 data->items.back ().extra = body_text;
3679 const struct gdb_xml_attribute thread_attributes[] = {
3680 { "id", GDB_XML_AF_NONE, NULL, NULL },
3681 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
3682 { "name", GDB_XML_AF_OPTIONAL, NULL, NULL },
3683 { "handle", GDB_XML_AF_OPTIONAL, NULL, NULL },
3684 { NULL, GDB_XML_AF_NONE, NULL, NULL }
3687 const struct gdb_xml_element thread_children[] = {
3688 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3691 const struct gdb_xml_element threads_children[] = {
3692 { "thread", thread_attributes, thread_children,
3693 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
3694 start_thread, end_thread },
3695 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3698 const struct gdb_xml_element threads_elements[] = {
3699 { "threads", NULL, threads_children,
3700 GDB_XML_EF_NONE, NULL, NULL },
3701 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3706 /* List remote threads using qXfer:threads:read. */
3709 remote_target::remote_get_threads_with_qxfer (threads_listing_context *context)
3711 #if defined(HAVE_LIBEXPAT)
3712 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3714 gdb::optional<gdb::char_vector> xml
3715 = target_read_stralloc (this, TARGET_OBJECT_THREADS, NULL);
3717 if (xml && (*xml)[0] != '\0')
3719 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3720 threads_elements, xml->data (), context);
3730 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3733 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context *context)
3735 struct remote_state *rs = get_remote_state ();
3737 if (rs->use_threadinfo_query)
3741 putpkt ("qfThreadInfo");
3742 getpkt (&rs->buf, 0);
3743 bufp = rs->buf.data ();
3744 if (bufp[0] != '\0') /* q packet recognized */
3746 while (*bufp++ == 'm') /* reply contains one or more TID */
3750 ptid_t ptid = read_ptid (bufp, &bufp);
3751 context->items.emplace_back (ptid);
3753 while (*bufp++ == ','); /* comma-separated list */
3754 putpkt ("qsThreadInfo");
3755 getpkt (&rs->buf, 0);
3756 bufp = rs->buf.data ();
3762 /* Packet not recognized. */
3763 rs->use_threadinfo_query = 0;
3770 /* Implement the to_update_thread_list function for the remote
3774 remote_target::update_thread_list ()
3776 struct threads_listing_context context;
3779 /* We have a few different mechanisms to fetch the thread list. Try
3780 them all, starting with the most preferred one first, falling
3781 back to older methods. */
3782 if (remote_get_threads_with_qxfer (&context)
3783 || remote_get_threads_with_qthreadinfo (&context)
3784 || remote_get_threads_with_ql (&context))
3788 if (context.items.empty ()
3789 && remote_thread_always_alive (inferior_ptid))
3791 /* Some targets don't really support threads, but still
3792 reply an (empty) thread list in response to the thread
3793 listing packets, instead of replying "packet not
3794 supported". Exit early so we don't delete the main
3799 /* CONTEXT now holds the current thread list on the remote
3800 target end. Delete GDB-side threads no longer found on the
3802 for (thread_info *tp : all_threads_safe ())
3804 if (!context.contains_thread (tp->ptid))
3811 /* Remove any unreported fork child threads from CONTEXT so
3812 that we don't interfere with follow fork, which is where
3813 creation of such threads is handled. */
3814 remove_new_fork_children (&context);
3816 /* And now add threads we don't know about yet to our list. */
3817 for (thread_item &item : context.items)
3819 if (item.ptid != null_ptid)
3821 /* In non-stop mode, we assume new found threads are
3822 executing until proven otherwise with a stop reply.
3823 In all-stop, we can only get here if all threads are
3825 int executing = target_is_non_stop_p () ? 1 : 0;
3827 remote_notice_new_inferior (item.ptid, executing);
3829 thread_info *tp = find_thread_ptid (item.ptid);
3830 remote_thread_info *info = get_remote_thread_info (tp);
3831 info->core = item.core;
3832 info->extra = std::move (item.extra);
3833 info->name = std::move (item.name);
3834 info->thread_handle = std::move (item.thread_handle);
3841 /* If no thread listing method is supported, then query whether
3842 each known thread is alive, one by one, with the T packet.
3843 If the target doesn't support threads at all, then this is a
3844 no-op. See remote_thread_alive. */
3850 * Collect a descriptive string about the given thread.
3851 * The target may say anything it wants to about the thread
3852 * (typically info about its blocked / runnable state, name, etc.).
3853 * This string will appear in the info threads display.
3855 * Optional: targets are not required to implement this function.
3859 remote_target::extra_thread_info (thread_info *tp)
3861 struct remote_state *rs = get_remote_state ();
3864 struct gdb_ext_thread_info threadinfo;
3866 if (rs->remote_desc == 0) /* paranoia */
3867 internal_error (__FILE__, __LINE__,
3868 _("remote_threads_extra_info"));
3870 if (tp->ptid == magic_null_ptid
3871 || (tp->ptid.pid () != 0 && tp->ptid.lwp () == 0))
3872 /* This is the main thread which was added by GDB. The remote
3873 server doesn't know about it. */
3876 std::string &extra = get_remote_thread_info (tp)->extra;
3878 /* If already have cached info, use it. */
3879 if (!extra.empty ())
3880 return extra.c_str ();
3882 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3884 /* If we're using qXfer:threads:read, then the extra info is
3885 included in the XML. So if we didn't have anything cached,
3886 it's because there's really no extra info. */
3890 if (rs->use_threadextra_query)
3892 char *b = rs->buf.data ();
3893 char *endb = b + get_remote_packet_size ();
3895 xsnprintf (b, endb - b, "qThreadExtraInfo,");
3897 write_ptid (b, endb, tp->ptid);
3900 getpkt (&rs->buf, 0);
3901 if (rs->buf[0] != 0)
3903 extra.resize (strlen (rs->buf.data ()) / 2);
3904 hex2bin (rs->buf.data (), (gdb_byte *) &extra[0], extra.size ());
3905 return extra.c_str ();
3909 /* If the above query fails, fall back to the old method. */
3910 rs->use_threadextra_query = 0;
3911 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
3912 | TAG_MOREDISPLAY | TAG_DISPLAY;
3913 int_to_threadref (&id, tp->ptid.lwp ());
3914 if (remote_get_threadinfo (&id, set, &threadinfo))
3915 if (threadinfo.active)
3917 if (*threadinfo.shortname)
3918 string_appendf (extra, " Name: %s", threadinfo.shortname);
3919 if (*threadinfo.display)
3921 if (!extra.empty ())
3923 string_appendf (extra, " State: %s", threadinfo.display);
3925 if (*threadinfo.more_display)
3927 if (!extra.empty ())
3929 string_appendf (extra, " Priority: %s", threadinfo.more_display);
3931 return extra.c_str ();
3938 remote_target::static_tracepoint_marker_at (CORE_ADDR addr,
3939 struct static_tracepoint_marker *marker)
3941 struct remote_state *rs = get_remote_state ();
3942 char *p = rs->buf.data ();
3944 xsnprintf (p, get_remote_packet_size (), "qTSTMat:");
3946 p += hexnumstr (p, addr);
3948 getpkt (&rs->buf, 0);
3949 p = rs->buf.data ();
3952 error (_("Remote failure reply: %s"), p);
3956 parse_static_tracepoint_marker_definition (p, NULL, marker);
3963 std::vector<static_tracepoint_marker>
3964 remote_target::static_tracepoint_markers_by_strid (const char *strid)
3966 struct remote_state *rs = get_remote_state ();
3967 std::vector<static_tracepoint_marker> markers;
3969 static_tracepoint_marker marker;
3971 /* Ask for a first packet of static tracepoint marker
3974 getpkt (&rs->buf, 0);
3975 p = rs->buf.data ();
3977 error (_("Remote failure reply: %s"), p);
3983 parse_static_tracepoint_marker_definition (p, &p, &marker);
3985 if (strid == NULL || marker.str_id == strid)
3986 markers.push_back (std::move (marker));
3988 while (*p++ == ','); /* comma-separated list */
3989 /* Ask for another packet of static tracepoint definition. */
3991 getpkt (&rs->buf, 0);
3992 p = rs->buf.data ();
3999 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4002 remote_target::get_ada_task_ptid (long lwp, long thread)
4004 return ptid_t (inferior_ptid.pid (), lwp, 0);
4008 /* Restart the remote side; this is an extended protocol operation. */
4011 remote_target::extended_remote_restart ()
4013 struct remote_state *rs = get_remote_state ();
4015 /* Send the restart command; for reasons I don't understand the
4016 remote side really expects a number after the "R". */
4017 xsnprintf (rs->buf.data (), get_remote_packet_size (), "R%x", 0);
4020 remote_fileio_reset ();
4023 /* Clean up connection to a remote debugger. */
4026 remote_target::close ()
4028 /* Make sure we leave stdin registered in the event loop. */
4031 /* We don't have a connection to the remote stub anymore. Get rid
4032 of all the inferiors and their threads we were controlling.
4033 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
4034 will be unable to find the thread corresponding to (pid, 0, 0). */
4035 inferior_ptid = null_ptid;
4036 discard_all_inferiors ();
4038 trace_reset_local_state ();
4043 remote_target::~remote_target ()
4045 struct remote_state *rs = get_remote_state ();
4047 /* Check for NULL because we may get here with a partially
4048 constructed target/connection. */
4049 if (rs->remote_desc == nullptr)
4052 serial_close (rs->remote_desc);
4054 /* We are destroying the remote target, so we should discard
4055 everything of this target. */
4056 discard_pending_stop_replies_in_queue ();
4058 if (rs->remote_async_inferior_event_token)
4059 delete_async_event_handler (&rs->remote_async_inferior_event_token);
4061 remote_notif_state_xfree (rs->notif_state);
4064 /* Query the remote side for the text, data and bss offsets. */
4067 remote_target::get_offsets ()
4069 struct remote_state *rs = get_remote_state ();
4072 int lose, num_segments = 0, do_sections, do_segments;
4073 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
4074 struct section_offsets *offs;
4075 struct symfile_segment_data *data;
4077 if (symfile_objfile == NULL)
4080 putpkt ("qOffsets");
4081 getpkt (&rs->buf, 0);
4082 buf = rs->buf.data ();
4084 if (buf[0] == '\000')
4085 return; /* Return silently. Stub doesn't support
4089 warning (_("Remote failure reply: %s"), buf);
4093 /* Pick up each field in turn. This used to be done with scanf, but
4094 scanf will make trouble if CORE_ADDR size doesn't match
4095 conversion directives correctly. The following code will work
4096 with any size of CORE_ADDR. */
4097 text_addr = data_addr = bss_addr = 0;
4101 if (startswith (ptr, "Text="))
4104 /* Don't use strtol, could lose on big values. */
4105 while (*ptr && *ptr != ';')
4106 text_addr = (text_addr << 4) + fromhex (*ptr++);
4108 if (startswith (ptr, ";Data="))
4111 while (*ptr && *ptr != ';')
4112 data_addr = (data_addr << 4) + fromhex (*ptr++);
4117 if (!lose && startswith (ptr, ";Bss="))
4120 while (*ptr && *ptr != ';')
4121 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
4123 if (bss_addr != data_addr)
4124 warning (_("Target reported unsupported offsets: %s"), buf);
4129 else if (startswith (ptr, "TextSeg="))
4132 /* Don't use strtol, could lose on big values. */
4133 while (*ptr && *ptr != ';')
4134 text_addr = (text_addr << 4) + fromhex (*ptr++);
4137 if (startswith (ptr, ";DataSeg="))
4140 while (*ptr && *ptr != ';')
4141 data_addr = (data_addr << 4) + fromhex (*ptr++);
4149 error (_("Malformed response to offset query, %s"), buf);
4150 else if (*ptr != '\0')
4151 warning (_("Target reported unsupported offsets: %s"), buf);
4153 offs = ((struct section_offsets *)
4154 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
4155 memcpy (offs, symfile_objfile->section_offsets,
4156 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
4158 data = get_symfile_segment_data (symfile_objfile->obfd);
4159 do_segments = (data != NULL);
4160 do_sections = num_segments == 0;
4162 if (num_segments > 0)
4164 segments[0] = text_addr;
4165 segments[1] = data_addr;
4167 /* If we have two segments, we can still try to relocate everything
4168 by assuming that the .text and .data offsets apply to the whole
4169 text and data segments. Convert the offsets given in the packet
4170 to base addresses for symfile_map_offsets_to_segments. */
4171 else if (data && data->num_segments == 2)
4173 segments[0] = data->segment_bases[0] + text_addr;
4174 segments[1] = data->segment_bases[1] + data_addr;
4177 /* If the object file has only one segment, assume that it is text
4178 rather than data; main programs with no writable data are rare,
4179 but programs with no code are useless. Of course the code might
4180 have ended up in the data segment... to detect that we would need
4181 the permissions here. */
4182 else if (data && data->num_segments == 1)
4184 segments[0] = data->segment_bases[0] + text_addr;
4187 /* There's no way to relocate by segment. */
4193 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
4194 offs, num_segments, segments);
4196 if (ret == 0 && !do_sections)
4197 error (_("Can not handle qOffsets TextSeg "
4198 "response with this symbol file"));
4205 free_symfile_segment_data (data);
4209 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
4211 /* This is a temporary kludge to force data and bss to use the
4212 same offsets because that's what nlmconv does now. The real
4213 solution requires changes to the stub and remote.c that I
4214 don't have time to do right now. */
4216 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
4217 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
4220 objfile_relocate (symfile_objfile, offs);
4223 /* Send interrupt_sequence to remote target. */
4226 remote_target::send_interrupt_sequence ()
4228 struct remote_state *rs = get_remote_state ();
4230 if (interrupt_sequence_mode == interrupt_sequence_control_c)
4231 remote_serial_write ("\x03", 1);
4232 else if (interrupt_sequence_mode == interrupt_sequence_break)
4233 serial_send_break (rs->remote_desc);
4234 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
4236 serial_send_break (rs->remote_desc);
4237 remote_serial_write ("g", 1);
4240 internal_error (__FILE__, __LINE__,
4241 _("Invalid value for interrupt_sequence_mode: %s."),
4242 interrupt_sequence_mode);
4246 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4247 and extract the PTID. Returns NULL_PTID if not found. */
4250 stop_reply_extract_thread (char *stop_reply)
4252 if (stop_reply[0] == 'T' && strlen (stop_reply) > 3)
4256 /* Txx r:val ; r:val (...) */
4259 /* Look for "register" named "thread". */
4264 p1 = strchr (p, ':');
4268 if (strncmp (p, "thread", p1 - p) == 0)
4269 return read_ptid (++p1, &p);
4271 p1 = strchr (p, ';');
4283 /* Determine the remote side's current thread. If we have a stop
4284 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4285 "thread" register we can extract the current thread from. If not,
4286 ask the remote which is the current thread with qC. The former
4287 method avoids a roundtrip. */
4290 remote_target::get_current_thread (char *wait_status)
4292 ptid_t ptid = null_ptid;
4294 /* Note we don't use remote_parse_stop_reply as that makes use of
4295 the target architecture, which we haven't yet fully determined at
4297 if (wait_status != NULL)
4298 ptid = stop_reply_extract_thread (wait_status);
4299 if (ptid == null_ptid)
4300 ptid = remote_current_thread (inferior_ptid);
4305 /* Query the remote target for which is the current thread/process,
4306 add it to our tables, and update INFERIOR_PTID. The caller is
4307 responsible for setting the state such that the remote end is ready
4308 to return the current thread.
4310 This function is called after handling the '?' or 'vRun' packets,
4311 whose response is a stop reply from which we can also try
4312 extracting the thread. If the target doesn't support the explicit
4313 qC query, we infer the current thread from that stop reply, passed
4314 in in WAIT_STATUS, which may be NULL. */
4317 remote_target::add_current_inferior_and_thread (char *wait_status)
4319 struct remote_state *rs = get_remote_state ();
4322 inferior_ptid = null_ptid;
4324 /* Now, if we have thread information, update inferior_ptid. */
4325 ptid_t curr_ptid = get_current_thread (wait_status);
4327 if (curr_ptid != null_ptid)
4329 if (!remote_multi_process_p (rs))
4334 /* Without this, some commands which require an active target
4335 (such as kill) won't work. This variable serves (at least)
4336 double duty as both the pid of the target process (if it has
4337 such), and as a flag indicating that a target is active. */
4338 curr_ptid = magic_null_ptid;
4342 remote_add_inferior (fake_pid_p, curr_ptid.pid (), -1, 1);
4344 /* Add the main thread and switch to it. Don't try reading
4345 registers yet, since we haven't fetched the target description
4347 thread_info *tp = add_thread_silent (curr_ptid);
4348 switch_to_thread_no_regs (tp);
4351 /* Print info about a thread that was found already stopped on
4355 print_one_stopped_thread (struct thread_info *thread)
4357 struct target_waitstatus *ws = &thread->suspend.waitstatus;
4359 switch_to_thread (thread);
4360 thread->suspend.stop_pc = get_frame_pc (get_current_frame ());
4361 set_current_sal_from_frame (get_current_frame ());
4363 thread->suspend.waitstatus_pending_p = 0;
4365 if (ws->kind == TARGET_WAITKIND_STOPPED)
4367 enum gdb_signal sig = ws->value.sig;
4369 if (signal_print_state (sig))
4370 gdb::observers::signal_received.notify (sig);
4372 gdb::observers::normal_stop.notify (NULL, 1);
4375 /* Process all initial stop replies the remote side sent in response
4376 to the ? packet. These indicate threads that were already stopped
4377 on initial connection. We mark these threads as stopped and print
4378 their current frame before giving the user the prompt. */
4381 remote_target::process_initial_stop_replies (int from_tty)
4383 int pending_stop_replies = stop_reply_queue_length ();
4384 struct thread_info *selected = NULL;
4385 struct thread_info *lowest_stopped = NULL;
4386 struct thread_info *first = NULL;
4388 /* Consume the initial pending events. */
4389 while (pending_stop_replies-- > 0)
4391 ptid_t waiton_ptid = minus_one_ptid;
4393 struct target_waitstatus ws;
4394 int ignore_event = 0;
4396 memset (&ws, 0, sizeof (ws));
4397 event_ptid = target_wait (waiton_ptid, &ws, TARGET_WNOHANG);
4399 print_target_wait_results (waiton_ptid, event_ptid, &ws);
4403 case TARGET_WAITKIND_IGNORE:
4404 case TARGET_WAITKIND_NO_RESUMED:
4405 case TARGET_WAITKIND_SIGNALLED:
4406 case TARGET_WAITKIND_EXITED:
4407 /* We shouldn't see these, but if we do, just ignore. */
4409 fprintf_unfiltered (gdb_stdlog, "remote: event ignored\n");
4413 case TARGET_WAITKIND_EXECD:
4414 xfree (ws.value.execd_pathname);
4423 struct thread_info *evthread = find_thread_ptid (event_ptid);
4425 if (ws.kind == TARGET_WAITKIND_STOPPED)
4427 enum gdb_signal sig = ws.value.sig;
4429 /* Stubs traditionally report SIGTRAP as initial signal,
4430 instead of signal 0. Suppress it. */
4431 if (sig == GDB_SIGNAL_TRAP)
4433 evthread->suspend.stop_signal = sig;
4437 evthread->suspend.waitstatus = ws;
4439 if (ws.kind != TARGET_WAITKIND_STOPPED
4440 || ws.value.sig != GDB_SIGNAL_0)
4441 evthread->suspend.waitstatus_pending_p = 1;
4443 set_executing (event_ptid, 0);
4444 set_running (event_ptid, 0);
4445 get_remote_thread_info (evthread)->vcont_resumed = 0;
4448 /* "Notice" the new inferiors before anything related to
4449 registers/memory. */
4450 for (inferior *inf : all_non_exited_inferiors ())
4452 inf->needs_setup = 1;
4456 thread_info *thread = any_live_thread_of_inferior (inf);
4457 notice_new_inferior (thread, thread->state == THREAD_RUNNING,
4462 /* If all-stop on top of non-stop, pause all threads. Note this
4463 records the threads' stop pc, so must be done after "noticing"
4467 stop_all_threads ();
4469 /* If all threads of an inferior were already stopped, we
4470 haven't setup the inferior yet. */
4471 for (inferior *inf : all_non_exited_inferiors ())
4473 if (inf->needs_setup)
4475 thread_info *thread = any_live_thread_of_inferior (inf);
4476 switch_to_thread_no_regs (thread);
4482 /* Now go over all threads that are stopped, and print their current
4483 frame. If all-stop, then if there's a signalled thread, pick
4485 for (thread_info *thread : all_non_exited_threads ())
4491 thread->set_running (false);
4492 else if (thread->state != THREAD_STOPPED)
4495 if (selected == NULL
4496 && thread->suspend.waitstatus_pending_p)
4499 if (lowest_stopped == NULL
4500 || thread->inf->num < lowest_stopped->inf->num
4501 || thread->per_inf_num < lowest_stopped->per_inf_num)
4502 lowest_stopped = thread;
4505 print_one_stopped_thread (thread);
4508 /* In all-stop, we only print the status of one thread, and leave
4509 others with their status pending. */
4512 thread_info *thread = selected;
4514 thread = lowest_stopped;
4518 print_one_stopped_thread (thread);
4521 /* For "info program". */
4522 thread_info *thread = inferior_thread ();
4523 if (thread->state == THREAD_STOPPED)
4524 set_last_target_status (inferior_ptid, thread->suspend.waitstatus);
4527 /* Start the remote connection and sync state. */
4530 remote_target::start_remote (int from_tty, int extended_p)
4532 struct remote_state *rs = get_remote_state ();
4533 struct packet_config *noack_config;
4534 char *wait_status = NULL;
4536 /* Signal other parts that we're going through the initial setup,
4537 and so things may not be stable yet. E.g., we don't try to
4538 install tracepoints until we've relocated symbols. Also, a
4539 Ctrl-C before we're connected and synced up can't interrupt the
4540 target. Instead, it offers to drop the (potentially wedged)
4542 rs->starting_up = 1;
4546 if (interrupt_on_connect)
4547 send_interrupt_sequence ();
4549 /* Ack any packet which the remote side has already sent. */
4550 remote_serial_write ("+", 1);
4552 /* The first packet we send to the target is the optional "supported
4553 packets" request. If the target can answer this, it will tell us
4554 which later probes to skip. */
4555 remote_query_supported ();
4557 /* If the stub wants to get a QAllow, compose one and send it. */
4558 if (packet_support (PACKET_QAllow) != PACKET_DISABLE)
4561 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4562 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4563 as a reply to known packet. For packet "vFile:setfs:" it is an
4564 invalid reply and GDB would return error in
4565 remote_hostio_set_filesystem, making remote files access impossible.
4566 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4567 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4569 const char v_mustreplyempty[] = "vMustReplyEmpty";
4571 putpkt (v_mustreplyempty);
4572 getpkt (&rs->buf, 0);
4573 if (strcmp (rs->buf.data (), "OK") == 0)
4574 remote_protocol_packets[PACKET_vFile_setfs].support = PACKET_DISABLE;
4575 else if (strcmp (rs->buf.data (), "") != 0)
4576 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty,
4580 /* Next, we possibly activate noack mode.
4582 If the QStartNoAckMode packet configuration is set to AUTO,
4583 enable noack mode if the stub reported a wish for it with
4586 If set to TRUE, then enable noack mode even if the stub didn't
4587 report it in qSupported. If the stub doesn't reply OK, the
4588 session ends with an error.
4590 If FALSE, then don't activate noack mode, regardless of what the
4591 stub claimed should be the default with qSupported. */
4593 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
4594 if (packet_config_support (noack_config) != PACKET_DISABLE)
4596 putpkt ("QStartNoAckMode");
4597 getpkt (&rs->buf, 0);
4598 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
4604 /* Tell the remote that we are using the extended protocol. */
4606 getpkt (&rs->buf, 0);
4609 /* Let the target know which signals it is allowed to pass down to
4611 update_signals_program_target ();
4613 /* Next, if the target can specify a description, read it. We do
4614 this before anything involving memory or registers. */
4615 target_find_description ();
4617 /* Next, now that we know something about the target, update the
4618 address spaces in the program spaces. */
4619 update_address_spaces ();
4621 /* On OSs where the list of libraries is global to all
4622 processes, we fetch them early. */
4623 if (gdbarch_has_global_solist (target_gdbarch ()))
4624 solib_add (NULL, from_tty, auto_solib_add);
4626 if (target_is_non_stop_p ())
4628 if (packet_support (PACKET_QNonStop) != PACKET_ENABLE)
4629 error (_("Non-stop mode requested, but remote "
4630 "does not support non-stop"));
4632 putpkt ("QNonStop:1");
4633 getpkt (&rs->buf, 0);
4635 if (strcmp (rs->buf.data (), "OK") != 0)
4636 error (_("Remote refused setting non-stop mode with: %s"),
4639 /* Find about threads and processes the stub is already
4640 controlling. We default to adding them in the running state.
4641 The '?' query below will then tell us about which threads are
4643 this->update_thread_list ();
4645 else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE)
4647 /* Don't assume that the stub can operate in all-stop mode.
4648 Request it explicitly. */
4649 putpkt ("QNonStop:0");
4650 getpkt (&rs->buf, 0);
4652 if (strcmp (rs->buf.data (), "OK") != 0)
4653 error (_("Remote refused setting all-stop mode with: %s"),
4657 /* Upload TSVs regardless of whether the target is running or not. The
4658 remote stub, such as GDBserver, may have some predefined or builtin
4659 TSVs, even if the target is not running. */
4660 if (get_trace_status (current_trace_status ()) != -1)
4662 struct uploaded_tsv *uploaded_tsvs = NULL;
4664 upload_trace_state_variables (&uploaded_tsvs);
4665 merge_uploaded_trace_state_variables (&uploaded_tsvs);
4668 /* Check whether the target is running now. */
4670 getpkt (&rs->buf, 0);
4672 if (!target_is_non_stop_p ())
4674 if (rs->buf[0] == 'W' || rs->buf[0] == 'X')
4677 error (_("The target is not running (try extended-remote?)"));
4679 /* We're connected, but not running. Drop out before we
4680 call start_remote. */
4681 rs->starting_up = 0;
4686 /* Save the reply for later. */
4687 wait_status = (char *) alloca (strlen (rs->buf.data ()) + 1);
4688 strcpy (wait_status, rs->buf.data ());
4691 /* Fetch thread list. */
4692 target_update_thread_list ();
4694 /* Let the stub know that we want it to return the thread. */
4695 set_continue_thread (minus_one_ptid);
4697 if (thread_count () == 0)
4699 /* Target has no concept of threads at all. GDB treats
4700 non-threaded target as single-threaded; add a main
4702 add_current_inferior_and_thread (wait_status);
4706 /* We have thread information; select the thread the target
4707 says should be current. If we're reconnecting to a
4708 multi-threaded program, this will ideally be the thread
4709 that last reported an event before GDB disconnected. */
4710 inferior_ptid = get_current_thread (wait_status);
4711 if (inferior_ptid == null_ptid)
4713 /* Odd... The target was able to list threads, but not
4714 tell us which thread was current (no "thread"
4715 register in T stop reply?). Just pick the first
4716 thread in the thread list then. */
4719 fprintf_unfiltered (gdb_stdlog,
4720 "warning: couldn't determine remote "
4721 "current thread; picking first in list.\n");
4723 inferior_ptid = inferior_list->thread_list->ptid;
4727 /* init_wait_for_inferior should be called before get_offsets in order
4728 to manage `inserted' flag in bp loc in a correct state.
4729 breakpoint_init_inferior, called from init_wait_for_inferior, set
4730 `inserted' flag to 0, while before breakpoint_re_set, called from
4731 start_remote, set `inserted' flag to 1. In the initialization of
4732 inferior, breakpoint_init_inferior should be called first, and then
4733 breakpoint_re_set can be called. If this order is broken, state of
4734 `inserted' flag is wrong, and cause some problems on breakpoint
4736 init_wait_for_inferior ();
4738 get_offsets (); /* Get text, data & bss offsets. */
4740 /* If we could not find a description using qXfer, and we know
4741 how to do it some other way, try again. This is not
4742 supported for non-stop; it could be, but it is tricky if
4743 there are no stopped threads when we connect. */
4744 if (remote_read_description_p (this)
4745 && gdbarch_target_desc (target_gdbarch ()) == NULL)
4747 target_clear_description ();
4748 target_find_description ();
4751 /* Use the previously fetched status. */
4752 gdb_assert (wait_status != NULL);
4753 strcpy (rs->buf.data (), wait_status);
4754 rs->cached_wait_status = 1;
4756 ::start_remote (from_tty); /* Initialize gdb process mechanisms. */
4760 /* Clear WFI global state. Do this before finding about new
4761 threads and inferiors, and setting the current inferior.
4762 Otherwise we would clear the proceed status of the current
4763 inferior when we want its stop_soon state to be preserved
4764 (see notice_new_inferior). */
4765 init_wait_for_inferior ();
4767 /* In non-stop, we will either get an "OK", meaning that there
4768 are no stopped threads at this time; or, a regular stop
4769 reply. In the latter case, there may be more than one thread
4770 stopped --- we pull them all out using the vStopped
4772 if (strcmp (rs->buf.data (), "OK") != 0)
4774 struct notif_client *notif = ¬if_client_stop;
4776 /* remote_notif_get_pending_replies acks this one, and gets
4778 rs->notif_state->pending_event[notif_client_stop.id]
4779 = remote_notif_parse (this, notif, rs->buf.data ());
4780 remote_notif_get_pending_events (notif);
4783 if (thread_count () == 0)
4786 error (_("The target is not running (try extended-remote?)"));
4788 /* We're connected, but not running. Drop out before we
4789 call start_remote. */
4790 rs->starting_up = 0;
4794 /* In non-stop mode, any cached wait status will be stored in
4795 the stop reply queue. */
4796 gdb_assert (wait_status == NULL);
4798 /* Report all signals during attach/startup. */
4801 /* If there are already stopped threads, mark them stopped and
4802 report their stops before giving the prompt to the user. */
4803 process_initial_stop_replies (from_tty);
4805 if (target_can_async_p ())
4809 /* If we connected to a live target, do some additional setup. */
4810 if (target_has_execution)
4812 if (symfile_objfile) /* No use without a symbol-file. */
4813 remote_check_symbols ();
4816 /* Possibly the target has been engaged in a trace run started
4817 previously; find out where things are at. */
4818 if (get_trace_status (current_trace_status ()) != -1)
4820 struct uploaded_tp *uploaded_tps = NULL;
4822 if (current_trace_status ()->running)
4823 printf_filtered (_("Trace is already running on the target.\n"));
4825 upload_tracepoints (&uploaded_tps);
4827 merge_uploaded_tracepoints (&uploaded_tps);
4830 /* Possibly the target has been engaged in a btrace record started
4831 previously; find out where things are at. */
4832 remote_btrace_maybe_reopen ();
4834 /* The thread and inferior lists are now synchronized with the
4835 target, our symbols have been relocated, and we're merged the
4836 target's tracepoints with ours. We're done with basic start
4838 rs->starting_up = 0;
4840 /* Maybe breakpoints are global and need to be inserted now. */
4841 if (breakpoints_should_be_inserted_now ())
4842 insert_breakpoints ();
4845 /* Open a connection to a remote debugger.
4846 NAME is the filename used for communication. */
4849 remote_target::open (const char *name, int from_tty)
4851 open_1 (name, from_tty, 0);
4854 /* Open a connection to a remote debugger using the extended
4855 remote gdb protocol. NAME is the filename used for communication. */
4858 extended_remote_target::open (const char *name, int from_tty)
4860 open_1 (name, from_tty, 1 /*extended_p */);
4863 /* Reset all packets back to "unknown support". Called when opening a
4864 new connection to a remote target. */
4867 reset_all_packet_configs_support (void)
4871 for (i = 0; i < PACKET_MAX; i++)
4872 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4875 /* Initialize all packet configs. */
4878 init_all_packet_configs (void)
4882 for (i = 0; i < PACKET_MAX; i++)
4884 remote_protocol_packets[i].detect = AUTO_BOOLEAN_AUTO;
4885 remote_protocol_packets[i].support = PACKET_SUPPORT_UNKNOWN;
4889 /* Symbol look-up. */
4892 remote_target::remote_check_symbols ()
4897 /* The remote side has no concept of inferiors that aren't running
4898 yet, it only knows about running processes. If we're connected
4899 but our current inferior is not running, we should not invite the
4900 remote target to request symbol lookups related to its
4901 (unrelated) current process. */
4902 if (!target_has_execution)
4905 if (packet_support (PACKET_qSymbol) == PACKET_DISABLE)
4908 /* Make sure the remote is pointing at the right process. Note
4909 there's no way to select "no process". */
4910 set_general_process ();
4912 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4913 because we need both at the same time. */
4914 gdb::char_vector msg (get_remote_packet_size ());
4915 gdb::char_vector reply (get_remote_packet_size ());
4917 /* Invite target to request symbol lookups. */
4919 putpkt ("qSymbol::");
4921 packet_ok (reply, &remote_protocol_packets[PACKET_qSymbol]);
4923 while (startswith (reply.data (), "qSymbol:"))
4925 struct bound_minimal_symbol sym;
4928 end = hex2bin (tmp, reinterpret_cast <gdb_byte *> (msg.data ()),
4931 sym = lookup_minimal_symbol (msg.data (), NULL, NULL);
4932 if (sym.minsym == NULL)
4933 xsnprintf (msg.data (), get_remote_packet_size (), "qSymbol::%s",
4937 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
4938 CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym);
4940 /* If this is a function address, return the start of code
4941 instead of any data function descriptor. */
4942 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4944 current_top_target ());
4946 xsnprintf (msg.data (), get_remote_packet_size (), "qSymbol:%s:%s",
4947 phex_nz (sym_addr, addr_size), &reply[8]);
4950 putpkt (msg.data ());
4955 static struct serial *
4956 remote_serial_open (const char *name)
4958 static int udp_warning = 0;
4960 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4961 of in ser-tcp.c, because it is the remote protocol assuming that the
4962 serial connection is reliable and not the serial connection promising
4964 if (!udp_warning && startswith (name, "udp:"))
4966 warning (_("The remote protocol may be unreliable over UDP.\n"
4967 "Some events may be lost, rendering further debugging "
4972 return serial_open (name);
4975 /* Inform the target of our permission settings. The permission flags
4976 work without this, but if the target knows the settings, it can do
4977 a couple things. First, it can add its own check, to catch cases
4978 that somehow manage to get by the permissions checks in target
4979 methods. Second, if the target is wired to disallow particular
4980 settings (for instance, a system in the field that is not set up to
4981 be able to stop at a breakpoint), it can object to any unavailable
4985 remote_target::set_permissions ()
4987 struct remote_state *rs = get_remote_state ();
4989 xsnprintf (rs->buf.data (), get_remote_packet_size (), "QAllow:"
4990 "WriteReg:%x;WriteMem:%x;"
4991 "InsertBreak:%x;InsertTrace:%x;"
4992 "InsertFastTrace:%x;Stop:%x",
4993 may_write_registers, may_write_memory,
4994 may_insert_breakpoints, may_insert_tracepoints,
4995 may_insert_fast_tracepoints, may_stop);
4997 getpkt (&rs->buf, 0);
4999 /* If the target didn't like the packet, warn the user. Do not try
5000 to undo the user's settings, that would just be maddening. */
5001 if (strcmp (rs->buf.data (), "OK") != 0)
5002 warning (_("Remote refused setting permissions with: %s"),
5006 /* This type describes each known response to the qSupported
5008 struct protocol_feature
5010 /* The name of this protocol feature. */
5013 /* The default for this protocol feature. */
5014 enum packet_support default_support;
5016 /* The function to call when this feature is reported, or after
5017 qSupported processing if the feature is not supported.
5018 The first argument points to this structure. The second
5019 argument indicates whether the packet requested support be
5020 enabled, disabled, or probed (or the default, if this function
5021 is being called at the end of processing and this feature was
5022 not reported). The third argument may be NULL; if not NULL, it
5023 is a NUL-terminated string taken from the packet following
5024 this feature's name and an equals sign. */
5025 void (*func) (remote_target *remote, const struct protocol_feature *,
5026 enum packet_support, const char *);
5028 /* The corresponding packet for this feature. Only used if
5029 FUNC is remote_supported_packet. */
5034 remote_supported_packet (remote_target *remote,
5035 const struct protocol_feature *feature,
5036 enum packet_support support,
5037 const char *argument)
5041 warning (_("Remote qSupported response supplied an unexpected value for"
5042 " \"%s\"."), feature->name);
5046 remote_protocol_packets[feature->packet].support = support;
5050 remote_target::remote_packet_size (const protocol_feature *feature,
5051 enum packet_support support, const char *value)
5053 struct remote_state *rs = get_remote_state ();
5058 if (support != PACKET_ENABLE)
5061 if (value == NULL || *value == '\0')
5063 warning (_("Remote target reported \"%s\" without a size."),
5069 packet_size = strtol (value, &value_end, 16);
5070 if (errno != 0 || *value_end != '\0' || packet_size < 0)
5072 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5073 feature->name, value);
5077 /* Record the new maximum packet size. */
5078 rs->explicit_packet_size = packet_size;
5082 remote_packet_size (remote_target *remote, const protocol_feature *feature,
5083 enum packet_support support, const char *value)
5085 remote->remote_packet_size (feature, support, value);
5088 static const struct protocol_feature remote_protocol_features[] = {
5089 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
5090 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
5091 PACKET_qXfer_auxv },
5092 { "qXfer:exec-file:read", PACKET_DISABLE, remote_supported_packet,
5093 PACKET_qXfer_exec_file },
5094 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
5095 PACKET_qXfer_features },
5096 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
5097 PACKET_qXfer_libraries },
5098 { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet,
5099 PACKET_qXfer_libraries_svr4 },
5100 { "augmented-libraries-svr4-read", PACKET_DISABLE,
5101 remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature },
5102 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
5103 PACKET_qXfer_memory_map },
5104 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
5105 PACKET_qXfer_spu_read },
5106 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
5107 PACKET_qXfer_spu_write },
5108 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
5109 PACKET_qXfer_osdata },
5110 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
5111 PACKET_qXfer_threads },
5112 { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet,
5113 PACKET_qXfer_traceframe_info },
5114 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
5115 PACKET_QPassSignals },
5116 { "QCatchSyscalls", PACKET_DISABLE, remote_supported_packet,
5117 PACKET_QCatchSyscalls },
5118 { "QProgramSignals", PACKET_DISABLE, remote_supported_packet,
5119 PACKET_QProgramSignals },
5120 { "QSetWorkingDir", PACKET_DISABLE, remote_supported_packet,
5121 PACKET_QSetWorkingDir },
5122 { "QStartupWithShell", PACKET_DISABLE, remote_supported_packet,
5123 PACKET_QStartupWithShell },
5124 { "QEnvironmentHexEncoded", PACKET_DISABLE, remote_supported_packet,
5125 PACKET_QEnvironmentHexEncoded },
5126 { "QEnvironmentReset", PACKET_DISABLE, remote_supported_packet,
5127 PACKET_QEnvironmentReset },
5128 { "QEnvironmentUnset", PACKET_DISABLE, remote_supported_packet,
5129 PACKET_QEnvironmentUnset },
5130 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
5131 PACKET_QStartNoAckMode },
5132 { "multiprocess", PACKET_DISABLE, remote_supported_packet,
5133 PACKET_multiprocess_feature },
5134 { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop },
5135 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
5136 PACKET_qXfer_siginfo_read },
5137 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
5138 PACKET_qXfer_siginfo_write },
5139 { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet,
5140 PACKET_ConditionalTracepoints },
5141 { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet,
5142 PACKET_ConditionalBreakpoints },
5143 { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet,
5144 PACKET_BreakpointCommands },
5145 { "FastTracepoints", PACKET_DISABLE, remote_supported_packet,
5146 PACKET_FastTracepoints },
5147 { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet,
5148 PACKET_StaticTracepoints },
5149 {"InstallInTrace", PACKET_DISABLE, remote_supported_packet,
5150 PACKET_InstallInTrace},
5151 { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet,
5152 PACKET_DisconnectedTracing_feature },
5153 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
5155 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
5157 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
5158 PACKET_TracepointSource },
5159 { "QAllow", PACKET_DISABLE, remote_supported_packet,
5161 { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet,
5162 PACKET_EnableDisableTracepoints_feature },
5163 { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet,
5164 PACKET_qXfer_fdpic },
5165 { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet,
5167 { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
5168 PACKET_QDisableRandomization },
5169 { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent},
5170 { "QTBuffer:size", PACKET_DISABLE,
5171 remote_supported_packet, PACKET_QTBuffer_size},
5172 { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature },
5173 { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off },
5174 { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts },
5175 { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt },
5176 { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet,
5177 PACKET_qXfer_btrace },
5178 { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet,
5179 PACKET_qXfer_btrace_conf },
5180 { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet,
5181 PACKET_Qbtrace_conf_bts_size },
5182 { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature },
5183 { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature },
5184 { "fork-events", PACKET_DISABLE, remote_supported_packet,
5185 PACKET_fork_event_feature },
5186 { "vfork-events", PACKET_DISABLE, remote_supported_packet,
5187 PACKET_vfork_event_feature },
5188 { "exec-events", PACKET_DISABLE, remote_supported_packet,
5189 PACKET_exec_event_feature },
5190 { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet,
5191 PACKET_Qbtrace_conf_pt_size },
5192 { "vContSupported", PACKET_DISABLE, remote_supported_packet, PACKET_vContSupported },
5193 { "QThreadEvents", PACKET_DISABLE, remote_supported_packet, PACKET_QThreadEvents },
5194 { "no-resumed", PACKET_DISABLE, remote_supported_packet, PACKET_no_resumed },
5197 static char *remote_support_xml;
5199 /* Register string appended to "xmlRegisters=" in qSupported query. */
5202 register_remote_support_xml (const char *xml)
5204 #if defined(HAVE_LIBEXPAT)
5205 if (remote_support_xml == NULL)
5206 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
5209 char *copy = xstrdup (remote_support_xml + 13);
5210 char *p = strtok (copy, ",");
5214 if (strcmp (p, xml) == 0)
5221 while ((p = strtok (NULL, ",")) != NULL);
5224 remote_support_xml = reconcat (remote_support_xml,
5225 remote_support_xml, ",", xml,
5232 remote_query_supported_append (std::string *msg, const char *append)
5236 msg->append (append);
5240 remote_target::remote_query_supported ()
5242 struct remote_state *rs = get_remote_state ();
5245 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
5247 /* The packet support flags are handled differently for this packet
5248 than for most others. We treat an error, a disabled packet, and
5249 an empty response identically: any features which must be reported
5250 to be used will be automatically disabled. An empty buffer
5251 accomplishes this, since that is also the representation for a list
5252 containing no features. */
5255 if (packet_support (PACKET_qSupported) != PACKET_DISABLE)
5259 if (packet_set_cmd_state (PACKET_multiprocess_feature) != AUTO_BOOLEAN_FALSE)
5260 remote_query_supported_append (&q, "multiprocess+");
5262 if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE)
5263 remote_query_supported_append (&q, "swbreak+");
5264 if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE)
5265 remote_query_supported_append (&q, "hwbreak+");
5267 remote_query_supported_append (&q, "qRelocInsn+");
5269 if (packet_set_cmd_state (PACKET_fork_event_feature)
5270 != AUTO_BOOLEAN_FALSE)
5271 remote_query_supported_append (&q, "fork-events+");
5272 if (packet_set_cmd_state (PACKET_vfork_event_feature)
5273 != AUTO_BOOLEAN_FALSE)
5274 remote_query_supported_append (&q, "vfork-events+");
5275 if (packet_set_cmd_state (PACKET_exec_event_feature)
5276 != AUTO_BOOLEAN_FALSE)
5277 remote_query_supported_append (&q, "exec-events+");
5279 if (packet_set_cmd_state (PACKET_vContSupported) != AUTO_BOOLEAN_FALSE)
5280 remote_query_supported_append (&q, "vContSupported+");
5282 if (packet_set_cmd_state (PACKET_QThreadEvents) != AUTO_BOOLEAN_FALSE)
5283 remote_query_supported_append (&q, "QThreadEvents+");
5285 if (packet_set_cmd_state (PACKET_no_resumed) != AUTO_BOOLEAN_FALSE)
5286 remote_query_supported_append (&q, "no-resumed+");
5288 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5289 the qSupported:xmlRegisters=i386 handling. */
5290 if (remote_support_xml != NULL
5291 && packet_support (PACKET_qXfer_features) != PACKET_DISABLE)
5292 remote_query_supported_append (&q, remote_support_xml);
5294 q = "qSupported:" + q;
5295 putpkt (q.c_str ());
5297 getpkt (&rs->buf, 0);
5299 /* If an error occured, warn, but do not return - just reset the
5300 buffer to empty and go on to disable features. */
5301 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
5304 warning (_("Remote failure reply: %s"), rs->buf.data ());
5309 memset (seen, 0, sizeof (seen));
5311 next = rs->buf.data ();
5314 enum packet_support is_supported;
5315 char *p, *end, *name_end, *value;
5317 /* First separate out this item from the rest of the packet. If
5318 there's another item after this, we overwrite the separator
5319 (terminated strings are much easier to work with). */
5321 end = strchr (p, ';');
5324 end = p + strlen (p);
5334 warning (_("empty item in \"qSupported\" response"));
5339 name_end = strchr (p, '=');
5342 /* This is a name=value entry. */
5343 is_supported = PACKET_ENABLE;
5344 value = name_end + 1;
5353 is_supported = PACKET_ENABLE;
5357 is_supported = PACKET_DISABLE;
5361 is_supported = PACKET_SUPPORT_UNKNOWN;
5365 warning (_("unrecognized item \"%s\" "
5366 "in \"qSupported\" response"), p);
5372 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
5373 if (strcmp (remote_protocol_features[i].name, p) == 0)
5375 const struct protocol_feature *feature;
5378 feature = &remote_protocol_features[i];
5379 feature->func (this, feature, is_supported, value);
5384 /* If we increased the packet size, make sure to increase the global
5385 buffer size also. We delay this until after parsing the entire
5386 qSupported packet, because this is the same buffer we were
5388 if (rs->buf.size () < rs->explicit_packet_size)
5389 rs->buf.resize (rs->explicit_packet_size);
5391 /* Handle the defaults for unmentioned features. */
5392 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
5395 const struct protocol_feature *feature;
5397 feature = &remote_protocol_features[i];
5398 feature->func (this, feature, feature->default_support, NULL);
5402 /* Serial QUIT handler for the remote serial descriptor.
5404 Defers handling a Ctrl-C until we're done with the current
5405 command/response packet sequence, unless:
5407 - We're setting up the connection. Don't send a remote interrupt
5408 request, as we're not fully synced yet. Quit immediately
5411 - The target has been resumed in the foreground
5412 (target_terminal::is_ours is false) with a synchronous resume
5413 packet, and we're blocked waiting for the stop reply, thus a
5414 Ctrl-C should be immediately sent to the target.
5416 - We get a second Ctrl-C while still within the same serial read or
5417 write. In that case the serial is seemingly wedged --- offer to
5420 - We see a second Ctrl-C without target response, after having
5421 previously interrupted the target. In that case the target/stub
5422 is probably wedged --- offer to quit/disconnect.
5426 remote_target::remote_serial_quit_handler ()
5428 struct remote_state *rs = get_remote_state ();
5430 if (check_quit_flag ())
5432 /* If we're starting up, we're not fully synced yet. Quit
5434 if (rs->starting_up)
5436 else if (rs->got_ctrlc_during_io)
5438 if (query (_("The target is not responding to GDB commands.\n"
5439 "Stop debugging it? ")))
5440 remote_unpush_and_throw ();
5442 /* If ^C has already been sent once, offer to disconnect. */
5443 else if (!target_terminal::is_ours () && rs->ctrlc_pending_p)
5445 /* All-stop protocol, and blocked waiting for stop reply. Send
5446 an interrupt request. */
5447 else if (!target_terminal::is_ours () && rs->waiting_for_stop_reply)
5448 target_interrupt ();
5450 rs->got_ctrlc_during_io = 1;
5454 /* The remote_target that is current while the quit handler is
5455 overridden with remote_serial_quit_handler. */
5456 static remote_target *curr_quit_handler_target;
5459 remote_serial_quit_handler ()
5461 curr_quit_handler_target->remote_serial_quit_handler ();
5464 /* Remove any of the remote.c targets from target stack. Upper targets depend
5465 on it so remove them first. */
5468 remote_unpush_target (void)
5470 pop_all_targets_at_and_above (process_stratum);
5474 remote_unpush_and_throw (void)
5476 remote_unpush_target ();
5477 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
5481 remote_target::open_1 (const char *name, int from_tty, int extended_p)
5483 remote_target *curr_remote = get_current_remote_target ();
5486 error (_("To open a remote debug connection, you need to specify what\n"
5487 "serial device is attached to the remote system\n"
5488 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5490 /* If we're connected to a running target, target_preopen will kill it.
5491 Ask this question first, before target_preopen has a chance to kill
5493 if (curr_remote != NULL && !have_inferiors ())
5496 && !query (_("Already connected to a remote target. Disconnect? ")))
5497 error (_("Still connected."));
5500 /* Here the possibly existing remote target gets unpushed. */
5501 target_preopen (from_tty);
5503 remote_fileio_reset ();
5504 reopen_exec_file ();
5507 remote_target *remote
5508 = (extended_p ? new extended_remote_target () : new remote_target ());
5509 target_ops_up target_holder (remote);
5511 remote_state *rs = remote->get_remote_state ();
5513 /* See FIXME above. */
5514 if (!target_async_permitted)
5515 rs->wait_forever_enabled_p = 1;
5517 rs->remote_desc = remote_serial_open (name);
5518 if (!rs->remote_desc)
5519 perror_with_name (name);
5521 if (baud_rate != -1)
5523 if (serial_setbaudrate (rs->remote_desc, baud_rate))
5525 /* The requested speed could not be set. Error out to
5526 top level after closing remote_desc. Take care to
5527 set remote_desc to NULL to avoid closing remote_desc
5529 serial_close (rs->remote_desc);
5530 rs->remote_desc = NULL;
5531 perror_with_name (name);
5535 serial_setparity (rs->remote_desc, serial_parity);
5536 serial_raw (rs->remote_desc);
5538 /* If there is something sitting in the buffer we might take it as a
5539 response to a command, which would be bad. */
5540 serial_flush_input (rs->remote_desc);
5544 puts_filtered ("Remote debugging using ");
5545 puts_filtered (name);
5546 puts_filtered ("\n");
5549 /* Switch to using the remote target now. */
5550 push_target (remote);
5551 /* The target stack owns the target now. */
5552 target_holder.release ();
5554 /* Register extra event sources in the event loop. */
5555 rs->remote_async_inferior_event_token
5556 = create_async_event_handler (remote_async_inferior_event_handler,
5558 rs->notif_state = remote_notif_state_allocate (remote);
5560 /* Reset the target state; these things will be queried either by
5561 remote_query_supported or as they are needed. */
5562 reset_all_packet_configs_support ();
5563 rs->cached_wait_status = 0;
5564 rs->explicit_packet_size = 0;
5566 rs->extended = extended_p;
5567 rs->waiting_for_stop_reply = 0;
5568 rs->ctrlc_pending_p = 0;
5569 rs->got_ctrlc_during_io = 0;
5571 rs->general_thread = not_sent_ptid;
5572 rs->continue_thread = not_sent_ptid;
5573 rs->remote_traceframe_number = -1;
5575 rs->last_resume_exec_dir = EXEC_FORWARD;
5577 /* Probe for ability to use "ThreadInfo" query, as required. */
5578 rs->use_threadinfo_query = 1;
5579 rs->use_threadextra_query = 1;
5581 rs->readahead_cache.invalidate ();
5583 if (target_async_permitted)
5585 /* FIXME: cagney/1999-09-23: During the initial connection it is
5586 assumed that the target is already ready and able to respond to
5587 requests. Unfortunately remote_start_remote() eventually calls
5588 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5589 around this. Eventually a mechanism that allows
5590 wait_for_inferior() to expect/get timeouts will be
5592 rs->wait_forever_enabled_p = 0;
5595 /* First delete any symbols previously loaded from shared libraries. */
5596 no_shared_libraries (NULL, 0);
5598 /* Start the remote connection. If error() or QUIT, discard this
5599 target (we'd otherwise be in an inconsistent state) and then
5600 propogate the error on up the exception chain. This ensures that
5601 the caller doesn't stumble along blindly assuming that the
5602 function succeeded. The CLI doesn't have this problem but other
5603 UI's, such as MI do.
5605 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5606 this function should return an error indication letting the
5607 caller restore the previous state. Unfortunately the command
5608 ``target remote'' is directly wired to this function making that
5609 impossible. On a positive note, the CLI side of this problem has
5610 been fixed - the function set_cmd_context() makes it possible for
5611 all the ``target ....'' commands to share a common callback
5612 function. See cli-dump.c. */
5617 remote->start_remote (from_tty, extended_p);
5619 CATCH (ex, RETURN_MASK_ALL)
5621 /* Pop the partially set up target - unless something else did
5622 already before throwing the exception. */
5623 if (ex.error != TARGET_CLOSE_ERROR)
5624 remote_unpush_target ();
5625 throw_exception (ex);
5630 remote_btrace_reset (rs);
5632 if (target_async_permitted)
5633 rs->wait_forever_enabled_p = 1;
5636 /* Detach the specified process. */
5639 remote_target::remote_detach_pid (int pid)
5641 struct remote_state *rs = get_remote_state ();
5643 /* This should not be necessary, but the handling for D;PID in
5644 GDBserver versions prior to 8.2 incorrectly assumes that the
5645 selected process points to the same process we're detaching,
5646 leading to misbehavior (and possibly GDBserver crashing) when it
5647 does not. Since it's easy and cheap, work around it by forcing
5648 GDBserver to select GDB's current process. */
5649 set_general_process ();
5651 if (remote_multi_process_p (rs))
5652 xsnprintf (rs->buf.data (), get_remote_packet_size (), "D;%x", pid);
5654 strcpy (rs->buf.data (), "D");
5657 getpkt (&rs->buf, 0);
5659 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
5661 else if (rs->buf[0] == '\0')
5662 error (_("Remote doesn't know how to detach"));
5664 error (_("Can't detach process."));
5667 /* This detaches a program to which we previously attached, using
5668 inferior_ptid to identify the process. After this is done, GDB
5669 can be used to debug some other program. We better not have left
5670 any breakpoints in the target program or it'll die when it hits
5674 remote_target::remote_detach_1 (inferior *inf, int from_tty)
5676 int pid = inferior_ptid.pid ();
5677 struct remote_state *rs = get_remote_state ();
5680 if (!target_has_execution)
5681 error (_("No process to detach from."));
5683 target_announce_detach (from_tty);
5685 /* Tell the remote target to detach. */
5686 remote_detach_pid (pid);
5688 /* Exit only if this is the only active inferior. */
5689 if (from_tty && !rs->extended && number_of_live_inferiors () == 1)
5690 puts_filtered (_("Ending remote debugging.\n"));
5692 struct thread_info *tp = find_thread_ptid (inferior_ptid);
5694 /* Check to see if we are detaching a fork parent. Note that if we
5695 are detaching a fork child, tp == NULL. */
5696 is_fork_parent = (tp != NULL
5697 && tp->pending_follow.kind == TARGET_WAITKIND_FORKED);
5699 /* If doing detach-on-fork, we don't mourn, because that will delete
5700 breakpoints that should be available for the followed inferior. */
5701 if (!is_fork_parent)
5703 /* Save the pid as a string before mourning, since that will
5704 unpush the remote target, and we need the string after. */
5705 std::string infpid = target_pid_to_str (ptid_t (pid));
5707 target_mourn_inferior (inferior_ptid);
5708 if (print_inferior_events)
5709 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5710 inf->num, infpid.c_str ());
5714 inferior_ptid = null_ptid;
5715 detach_inferior (current_inferior ());
5720 remote_target::detach (inferior *inf, int from_tty)
5722 remote_detach_1 (inf, from_tty);
5726 extended_remote_target::detach (inferior *inf, int from_tty)
5728 remote_detach_1 (inf, from_tty);
5731 /* Target follow-fork function for remote targets. On entry, and
5732 at return, the current inferior is the fork parent.
5734 Note that although this is currently only used for extended-remote,
5735 it is named remote_follow_fork in anticipation of using it for the
5736 remote target as well. */
5739 remote_target::follow_fork (int follow_child, int detach_fork)
5741 struct remote_state *rs = get_remote_state ();
5742 enum target_waitkind kind = inferior_thread ()->pending_follow.kind;
5744 if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs))
5745 || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs)))
5747 /* When following the parent and detaching the child, we detach
5748 the child here. For the case of following the child and
5749 detaching the parent, the detach is done in the target-
5750 independent follow fork code in infrun.c. We can't use
5751 target_detach when detaching an unfollowed child because
5752 the client side doesn't know anything about the child. */
5753 if (detach_fork && !follow_child)
5755 /* Detach the fork child. */
5759 child_ptid = inferior_thread ()->pending_follow.value.related_pid;
5760 child_pid = child_ptid.pid ();
5762 remote_detach_pid (child_pid);
5768 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5769 in the program space of the new inferior. On entry and at return the
5770 current inferior is the exec'ing inferior. INF is the new exec'd
5771 inferior, which may be the same as the exec'ing inferior unless
5772 follow-exec-mode is "new". */
5775 remote_target::follow_exec (struct inferior *inf, char *execd_pathname)
5777 /* We know that this is a target file name, so if it has the "target:"
5778 prefix we strip it off before saving it in the program space. */
5779 if (is_target_filename (execd_pathname))
5780 execd_pathname += strlen (TARGET_SYSROOT_PREFIX);
5782 set_pspace_remote_exec_file (inf->pspace, execd_pathname);
5785 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5788 remote_target::disconnect (const char *args, int from_tty)
5791 error (_("Argument given to \"disconnect\" when remotely debugging."));
5793 /* Make sure we unpush even the extended remote targets. Calling
5794 target_mourn_inferior won't unpush, and remote_mourn won't
5795 unpush if there is more than one inferior left. */
5796 unpush_target (this);
5797 generic_mourn_inferior ();
5800 puts_filtered ("Ending remote debugging.\n");
5803 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5804 be chatty about it. */
5807 extended_remote_target::attach (const char *args, int from_tty)
5809 struct remote_state *rs = get_remote_state ();
5811 char *wait_status = NULL;
5813 pid = parse_pid_to_attach (args);
5815 /* Remote PID can be freely equal to getpid, do not check it here the same
5816 way as in other targets. */
5818 if (packet_support (PACKET_vAttach) == PACKET_DISABLE)
5819 error (_("This target does not support attaching to a process"));
5823 char *exec_file = get_exec_file (0);
5826 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
5827 target_pid_to_str (ptid_t (pid)));
5829 printf_unfiltered (_("Attaching to %s\n"),
5830 target_pid_to_str (ptid_t (pid)));
5832 gdb_flush (gdb_stdout);
5835 xsnprintf (rs->buf.data (), get_remote_packet_size (), "vAttach;%x", pid);
5837 getpkt (&rs->buf, 0);
5839 switch (packet_ok (rs->buf,
5840 &remote_protocol_packets[PACKET_vAttach]))
5843 if (!target_is_non_stop_p ())
5845 /* Save the reply for later. */
5846 wait_status = (char *) alloca (strlen (rs->buf.data ()) + 1);
5847 strcpy (wait_status, rs->buf.data ());
5849 else if (strcmp (rs->buf.data (), "OK") != 0)
5850 error (_("Attaching to %s failed with: %s"),
5851 target_pid_to_str (ptid_t (pid)),
5854 case PACKET_UNKNOWN:
5855 error (_("This target does not support attaching to a process"));
5857 error (_("Attaching to %s failed"),
5858 target_pid_to_str (ptid_t (pid)));
5861 set_current_inferior (remote_add_inferior (0, pid, 1, 0));
5863 inferior_ptid = ptid_t (pid);
5865 if (target_is_non_stop_p ())
5867 struct thread_info *thread;
5869 /* Get list of threads. */
5870 update_thread_list ();
5872 thread = first_thread_of_inferior (current_inferior ());
5874 inferior_ptid = thread->ptid;
5876 inferior_ptid = ptid_t (pid);
5878 /* Invalidate our notion of the remote current thread. */
5879 record_currthread (rs, minus_one_ptid);
5883 /* Now, if we have thread information, update inferior_ptid. */
5884 inferior_ptid = remote_current_thread (inferior_ptid);
5886 /* Add the main thread to the thread list. */
5887 thread_info *thr = add_thread_silent (inferior_ptid);
5888 /* Don't consider the thread stopped until we've processed the
5889 saved stop reply. */
5890 set_executing (thr->ptid, true);
5893 /* Next, if the target can specify a description, read it. We do
5894 this before anything involving memory or registers. */
5895 target_find_description ();
5897 if (!target_is_non_stop_p ())
5899 /* Use the previously fetched status. */
5900 gdb_assert (wait_status != NULL);
5902 if (target_can_async_p ())
5904 struct notif_event *reply
5905 = remote_notif_parse (this, ¬if_client_stop, wait_status);
5907 push_stop_reply ((struct stop_reply *) reply);
5913 gdb_assert (wait_status != NULL);
5914 strcpy (rs->buf.data (), wait_status);
5915 rs->cached_wait_status = 1;
5919 gdb_assert (wait_status == NULL);
5922 /* Implementation of the to_post_attach method. */
5925 extended_remote_target::post_attach (int pid)
5927 /* Get text, data & bss offsets. */
5930 /* In certain cases GDB might not have had the chance to start
5931 symbol lookup up until now. This could happen if the debugged
5932 binary is not using shared libraries, the vsyscall page is not
5933 present (on Linux) and the binary itself hadn't changed since the
5934 debugging process was started. */
5935 if (symfile_objfile != NULL)
5936 remote_check_symbols();
5940 /* Check for the availability of vCont. This function should also check
5944 remote_target::remote_vcont_probe ()
5946 remote_state *rs = get_remote_state ();
5949 strcpy (rs->buf.data (), "vCont?");
5951 getpkt (&rs->buf, 0);
5952 buf = rs->buf.data ();
5954 /* Make sure that the features we assume are supported. */
5955 if (startswith (buf, "vCont"))
5958 int support_c, support_C;
5960 rs->supports_vCont.s = 0;
5961 rs->supports_vCont.S = 0;
5964 rs->supports_vCont.t = 0;
5965 rs->supports_vCont.r = 0;
5966 while (p && *p == ';')
5969 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
5970 rs->supports_vCont.s = 1;
5971 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
5972 rs->supports_vCont.S = 1;
5973 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
5975 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
5977 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
5978 rs->supports_vCont.t = 1;
5979 else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0))
5980 rs->supports_vCont.r = 1;
5982 p = strchr (p, ';');
5985 /* If c, and C are not all supported, we can't use vCont. Clearing
5986 BUF will make packet_ok disable the packet. */
5987 if (!support_c || !support_C)
5991 packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCont]);
5994 /* Helper function for building "vCont" resumptions. Write a
5995 resumption to P. ENDP points to one-passed-the-end of the buffer
5996 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5997 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5998 resumed thread should be single-stepped and/or signalled. If PTID
5999 equals minus_one_ptid, then all threads are resumed; if PTID
6000 represents a process, then all threads of the process are resumed;
6001 the thread to be stepped and/or signalled is given in the global
6005 remote_target::append_resumption (char *p, char *endp,
6006 ptid_t ptid, int step, gdb_signal siggnal)
6008 struct remote_state *rs = get_remote_state ();
6010 if (step && siggnal != GDB_SIGNAL_0)
6011 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
6013 /* GDB is willing to range step. */
6014 && use_range_stepping
6015 /* Target supports range stepping. */
6016 && rs->supports_vCont.r
6017 /* We don't currently support range stepping multiple
6018 threads with a wildcard (though the protocol allows it,
6019 so stubs shouldn't make an active effort to forbid
6021 && !(remote_multi_process_p (rs) && ptid.is_pid ()))
6023 struct thread_info *tp;
6025 if (ptid == minus_one_ptid)
6027 /* If we don't know about the target thread's tid, then
6028 we're resuming magic_null_ptid (see caller). */
6029 tp = find_thread_ptid (magic_null_ptid);
6032 tp = find_thread_ptid (ptid);
6033 gdb_assert (tp != NULL);
6035 if (tp->control.may_range_step)
6037 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
6039 p += xsnprintf (p, endp - p, ";r%s,%s",
6040 phex_nz (tp->control.step_range_start,
6042 phex_nz (tp->control.step_range_end,
6046 p += xsnprintf (p, endp - p, ";s");
6049 p += xsnprintf (p, endp - p, ";s");
6050 else if (siggnal != GDB_SIGNAL_0)
6051 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
6053 p += xsnprintf (p, endp - p, ";c");
6055 if (remote_multi_process_p (rs) && ptid.is_pid ())
6059 /* All (-1) threads of process. */
6060 nptid = ptid_t (ptid.pid (), -1, 0);
6062 p += xsnprintf (p, endp - p, ":");
6063 p = write_ptid (p, endp, nptid);
6065 else if (ptid != minus_one_ptid)
6067 p += xsnprintf (p, endp - p, ":");
6068 p = write_ptid (p, endp, ptid);
6074 /* Clear the thread's private info on resume. */
6077 resume_clear_thread_private_info (struct thread_info *thread)
6079 if (thread->priv != NULL)
6081 remote_thread_info *priv = get_remote_thread_info (thread);
6083 priv->stop_reason = TARGET_STOPPED_BY_NO_REASON;
6084 priv->watch_data_address = 0;
6088 /* Append a vCont continue-with-signal action for threads that have a
6089 non-zero stop signal. */
6092 remote_target::append_pending_thread_resumptions (char *p, char *endp,
6095 for (thread_info *thread : all_non_exited_threads (ptid))
6096 if (inferior_ptid != thread->ptid
6097 && thread->suspend.stop_signal != GDB_SIGNAL_0)
6099 p = append_resumption (p, endp, thread->ptid,
6100 0, thread->suspend.stop_signal);
6101 thread->suspend.stop_signal = GDB_SIGNAL_0;
6102 resume_clear_thread_private_info (thread);
6108 /* Set the target running, using the packets that use Hc
6112 remote_target::remote_resume_with_hc (ptid_t ptid, int step,
6115 struct remote_state *rs = get_remote_state ();
6118 rs->last_sent_signal = siggnal;
6119 rs->last_sent_step = step;
6121 /* The c/s/C/S resume packets use Hc, so set the continue
6123 if (ptid == minus_one_ptid)
6124 set_continue_thread (any_thread_ptid);
6126 set_continue_thread (ptid);
6128 for (thread_info *thread : all_non_exited_threads ())
6129 resume_clear_thread_private_info (thread);
6131 buf = rs->buf.data ();
6132 if (::execution_direction == EXEC_REVERSE)
6134 /* We don't pass signals to the target in reverse exec mode. */
6135 if (info_verbose && siggnal != GDB_SIGNAL_0)
6136 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6139 if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
6140 error (_("Remote reverse-step not supported."));
6141 if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
6142 error (_("Remote reverse-continue not supported."));
6144 strcpy (buf, step ? "bs" : "bc");
6146 else if (siggnal != GDB_SIGNAL_0)
6148 buf[0] = step ? 'S' : 'C';
6149 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
6150 buf[2] = tohex (((int) siggnal) & 0xf);
6154 strcpy (buf, step ? "s" : "c");
6159 /* Resume the remote inferior by using a "vCont" packet. The thread
6160 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6161 resumed thread should be single-stepped and/or signalled. If PTID
6162 equals minus_one_ptid, then all threads are resumed; the thread to
6163 be stepped and/or signalled is given in the global INFERIOR_PTID.
6164 This function returns non-zero iff it resumes the inferior.
6166 This function issues a strict subset of all possible vCont commands
6170 remote_target::remote_resume_with_vcont (ptid_t ptid, int step,
6171 enum gdb_signal siggnal)
6173 struct remote_state *rs = get_remote_state ();
6177 /* No reverse execution actions defined for vCont. */
6178 if (::execution_direction == EXEC_REVERSE)
6181 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
6182 remote_vcont_probe ();
6184 if (packet_support (PACKET_vCont) == PACKET_DISABLE)
6187 p = rs->buf.data ();
6188 endp = p + get_remote_packet_size ();
6190 /* If we could generate a wider range of packets, we'd have to worry
6191 about overflowing BUF. Should there be a generic
6192 "multi-part-packet" packet? */
6194 p += xsnprintf (p, endp - p, "vCont");
6196 if (ptid == magic_null_ptid)
6198 /* MAGIC_NULL_PTID means that we don't have any active threads,
6199 so we don't have any TID numbers the inferior will
6200 understand. Make sure to only send forms that do not specify
6202 append_resumption (p, endp, minus_one_ptid, step, siggnal);
6204 else if (ptid == minus_one_ptid || ptid.is_pid ())
6206 /* Resume all threads (of all processes, or of a single
6207 process), with preference for INFERIOR_PTID. This assumes
6208 inferior_ptid belongs to the set of all threads we are about
6210 if (step || siggnal != GDB_SIGNAL_0)
6212 /* Step inferior_ptid, with or without signal. */
6213 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
6216 /* Also pass down any pending signaled resumption for other
6217 threads not the current. */
6218 p = append_pending_thread_resumptions (p, endp, ptid);
6220 /* And continue others without a signal. */
6221 append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0);
6225 /* Scheduler locking; resume only PTID. */
6226 append_resumption (p, endp, ptid, step, siggnal);
6229 gdb_assert (strlen (rs->buf.data ()) < get_remote_packet_size ());
6232 if (target_is_non_stop_p ())
6234 /* In non-stop, the stub replies to vCont with "OK". The stop
6235 reply will be reported asynchronously by means of a `%Stop'
6237 getpkt (&rs->buf, 0);
6238 if (strcmp (rs->buf.data (), "OK") != 0)
6239 error (_("Unexpected vCont reply in non-stop mode: %s"),
6246 /* Tell the remote machine to resume. */
6249 remote_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal)
6251 struct remote_state *rs = get_remote_state ();
6253 /* When connected in non-stop mode, the core resumes threads
6254 individually. Resuming remote threads directly in target_resume
6255 would thus result in sending one packet per thread. Instead, to
6256 minimize roundtrip latency, here we just store the resume
6257 request; the actual remote resumption will be done in
6258 target_commit_resume / remote_commit_resume, where we'll be able
6259 to do vCont action coalescing. */
6260 if (target_is_non_stop_p () && ::execution_direction != EXEC_REVERSE)
6262 remote_thread_info *remote_thr;
6264 if (minus_one_ptid == ptid || ptid.is_pid ())
6265 remote_thr = get_remote_thread_info (inferior_ptid);
6267 remote_thr = get_remote_thread_info (ptid);
6269 remote_thr->last_resume_step = step;
6270 remote_thr->last_resume_sig = siggnal;
6274 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6275 (explained in remote-notif.c:handle_notification) so
6276 remote_notif_process is not called. We need find a place where
6277 it is safe to start a 'vNotif' sequence. It is good to do it
6278 before resuming inferior, because inferior was stopped and no RSP
6279 traffic at that moment. */
6280 if (!target_is_non_stop_p ())
6281 remote_notif_process (rs->notif_state, ¬if_client_stop);
6283 rs->last_resume_exec_dir = ::execution_direction;
6285 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6286 if (!remote_resume_with_vcont (ptid, step, siggnal))
6287 remote_resume_with_hc (ptid, step, siggnal);
6289 /* We are about to start executing the inferior, let's register it
6290 with the event loop. NOTE: this is the one place where all the
6291 execution commands end up. We could alternatively do this in each
6292 of the execution commands in infcmd.c. */
6293 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6294 into infcmd.c in order to allow inferior function calls to work
6295 NOT asynchronously. */
6296 if (target_can_async_p ())
6299 /* We've just told the target to resume. The remote server will
6300 wait for the inferior to stop, and then send a stop reply. In
6301 the mean time, we can't start another command/query ourselves
6302 because the stub wouldn't be ready to process it. This applies
6303 only to the base all-stop protocol, however. In non-stop (which
6304 only supports vCont), the stub replies with an "OK", and is
6305 immediate able to process further serial input. */
6306 if (!target_is_non_stop_p ())
6307 rs->waiting_for_stop_reply = 1;
6310 static int is_pending_fork_parent_thread (struct thread_info *thread);
6312 /* Private per-inferior info for target remote processes. */
6314 struct remote_inferior : public private_inferior
6316 /* Whether we can send a wildcard vCont for this process. */
6317 bool may_wildcard_vcont = true;
6320 /* Get the remote private inferior data associated to INF. */
6322 static remote_inferior *
6323 get_remote_inferior (inferior *inf)
6325 if (inf->priv == NULL)
6326 inf->priv.reset (new remote_inferior);
6328 return static_cast<remote_inferior *> (inf->priv.get ());
6331 /* Class used to track the construction of a vCont packet in the
6332 outgoing packet buffer. This is used to send multiple vCont
6333 packets if we have more actions than would fit a single packet. */
6338 explicit vcont_builder (remote_target *remote)
6345 void push_action (ptid_t ptid, bool step, gdb_signal siggnal);
6350 /* The remote target. */
6351 remote_target *m_remote;
6353 /* Pointer to the first action. P points here if no action has been
6355 char *m_first_action;
6357 /* Where the next action will be appended. */
6360 /* The end of the buffer. Must never write past this. */
6364 /* Prepare the outgoing buffer for a new vCont packet. */
6367 vcont_builder::restart ()
6369 struct remote_state *rs = m_remote->get_remote_state ();
6371 m_p = rs->buf.data ();
6372 m_endp = m_p + m_remote->get_remote_packet_size ();
6373 m_p += xsnprintf (m_p, m_endp - m_p, "vCont");
6374 m_first_action = m_p;
6377 /* If the vCont packet being built has any action, send it to the
6381 vcont_builder::flush ()
6383 struct remote_state *rs;
6385 if (m_p == m_first_action)
6388 rs = m_remote->get_remote_state ();
6389 m_remote->putpkt (rs->buf);
6390 m_remote->getpkt (&rs->buf, 0);
6391 if (strcmp (rs->buf.data (), "OK") != 0)
6392 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf.data ());
6395 /* The largest action is range-stepping, with its two addresses. This
6396 is more than sufficient. If a new, bigger action is created, it'll
6397 quickly trigger a failed assertion in append_resumption (and we'll
6399 #define MAX_ACTION_SIZE 200
6401 /* Append a new vCont action in the outgoing packet being built. If
6402 the action doesn't fit the packet along with previous actions, push
6403 what we've got so far to the remote end and start over a new vCont
6404 packet (with the new action). */
6407 vcont_builder::push_action (ptid_t ptid, bool step, gdb_signal siggnal)
6409 char buf[MAX_ACTION_SIZE + 1];
6411 char *endp = m_remote->append_resumption (buf, buf + sizeof (buf),
6412 ptid, step, siggnal);
6414 /* Check whether this new action would fit in the vCont packet along
6415 with previous actions. If not, send what we've got so far and
6416 start a new vCont packet. */
6417 size_t rsize = endp - buf;
6418 if (rsize > m_endp - m_p)
6423 /* Should now fit. */
6424 gdb_assert (rsize <= m_endp - m_p);
6427 memcpy (m_p, buf, rsize);
6432 /* to_commit_resume implementation. */
6435 remote_target::commit_resume ()
6437 int any_process_wildcard;
6438 int may_global_wildcard_vcont;
6440 /* If connected in all-stop mode, we'd send the remote resume
6441 request directly from remote_resume. Likewise if
6442 reverse-debugging, as there are no defined vCont actions for
6443 reverse execution. */
6444 if (!target_is_non_stop_p () || ::execution_direction == EXEC_REVERSE)
6447 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6448 instead of resuming all threads of each process individually.
6449 However, if any thread of a process must remain halted, we can't
6450 send wildcard resumes and must send one action per thread.
6452 Care must be taken to not resume threads/processes the server
6453 side already told us are stopped, but the core doesn't know about
6454 yet, because the events are still in the vStopped notification
6457 #1 => vCont s:p1.1;c
6459 #3 <= %Stopped T05 p1.1
6464 #8 (infrun handles the stop for p1.1 and continues stepping)
6465 #9 => vCont s:p1.1;c
6467 The last vCont above would resume thread p1.2 by mistake, because
6468 the server has no idea that the event for p1.2 had not been
6471 The server side must similarly ignore resume actions for the
6472 thread that has a pending %Stopped notification (and any other
6473 threads with events pending), until GDB acks the notification
6474 with vStopped. Otherwise, e.g., the following case is
6477 #1 => g (or any other packet)
6479 #3 <= %Stopped T05 p1.2
6480 #4 => vCont s:p1.1;c
6483 Above, the server must not resume thread p1.2. GDB can't know
6484 that p1.2 stopped until it acks the %Stopped notification, and
6485 since from GDB's perspective all threads should be running, it
6488 Finally, special care must also be given to handling fork/vfork
6489 events. A (v)fork event actually tells us that two processes
6490 stopped -- the parent and the child. Until we follow the fork,
6491 we must not resume the child. Therefore, if we have a pending
6492 fork follow, we must not send a global wildcard resume action
6493 (vCont;c). We can still send process-wide wildcards though. */
6495 /* Start by assuming a global wildcard (vCont;c) is possible. */
6496 may_global_wildcard_vcont = 1;
6498 /* And assume every process is individually wildcard-able too. */
6499 for (inferior *inf : all_non_exited_inferiors ())
6501 remote_inferior *priv = get_remote_inferior (inf);
6503 priv->may_wildcard_vcont = true;
6506 /* Check for any pending events (not reported or processed yet) and
6507 disable process and global wildcard resumes appropriately. */
6508 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont);
6510 for (thread_info *tp : all_non_exited_threads ())
6512 /* If a thread of a process is not meant to be resumed, then we
6513 can't wildcard that process. */
6516 get_remote_inferior (tp->inf)->may_wildcard_vcont = false;
6518 /* And if we can't wildcard a process, we can't wildcard
6519 everything either. */
6520 may_global_wildcard_vcont = 0;
6524 /* If a thread is the parent of an unfollowed fork, then we
6525 can't do a global wildcard, as that would resume the fork
6527 if (is_pending_fork_parent_thread (tp))
6528 may_global_wildcard_vcont = 0;
6531 /* Now let's build the vCont packet(s). Actions must be appended
6532 from narrower to wider scopes (thread -> process -> global). If
6533 we end up with too many actions for a single packet vcont_builder
6534 flushes the current vCont packet to the remote side and starts a
6536 struct vcont_builder vcont_builder (this);
6538 /* Threads first. */
6539 for (thread_info *tp : all_non_exited_threads ())
6541 remote_thread_info *remote_thr = get_remote_thread_info (tp);
6543 if (!tp->executing || remote_thr->vcont_resumed)
6546 gdb_assert (!thread_is_in_step_over_chain (tp));
6548 if (!remote_thr->last_resume_step
6549 && remote_thr->last_resume_sig == GDB_SIGNAL_0
6550 && get_remote_inferior (tp->inf)->may_wildcard_vcont)
6552 /* We'll send a wildcard resume instead. */
6553 remote_thr->vcont_resumed = 1;
6557 vcont_builder.push_action (tp->ptid,
6558 remote_thr->last_resume_step,
6559 remote_thr->last_resume_sig);
6560 remote_thr->vcont_resumed = 1;
6563 /* Now check whether we can send any process-wide wildcard. This is
6564 to avoid sending a global wildcard in the case nothing is
6565 supposed to be resumed. */
6566 any_process_wildcard = 0;
6568 for (inferior *inf : all_non_exited_inferiors ())
6570 if (get_remote_inferior (inf)->may_wildcard_vcont)
6572 any_process_wildcard = 1;
6577 if (any_process_wildcard)
6579 /* If all processes are wildcard-able, then send a single "c"
6580 action, otherwise, send an "all (-1) threads of process"
6581 continue action for each running process, if any. */
6582 if (may_global_wildcard_vcont)
6584 vcont_builder.push_action (minus_one_ptid,
6585 false, GDB_SIGNAL_0);
6589 for (inferior *inf : all_non_exited_inferiors ())
6591 if (get_remote_inferior (inf)->may_wildcard_vcont)
6593 vcont_builder.push_action (ptid_t (inf->pid),
6594 false, GDB_SIGNAL_0);
6600 vcont_builder.flush ();
6605 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6606 thread, all threads of a remote process, or all threads of all
6610 remote_target::remote_stop_ns (ptid_t ptid)
6612 struct remote_state *rs = get_remote_state ();
6613 char *p = rs->buf.data ();
6614 char *endp = p + get_remote_packet_size ();
6616 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
6617 remote_vcont_probe ();
6619 if (!rs->supports_vCont.t)
6620 error (_("Remote server does not support stopping threads"));
6622 if (ptid == minus_one_ptid
6623 || (!remote_multi_process_p (rs) && ptid.is_pid ()))
6624 p += xsnprintf (p, endp - p, "vCont;t");
6629 p += xsnprintf (p, endp - p, "vCont;t:");
6632 /* All (-1) threads of process. */
6633 nptid = ptid_t (ptid.pid (), -1, 0);
6636 /* Small optimization: if we already have a stop reply for
6637 this thread, no use in telling the stub we want this
6639 if (peek_stop_reply (ptid))
6645 write_ptid (p, endp, nptid);
6648 /* In non-stop, we get an immediate OK reply. The stop reply will
6649 come in asynchronously by notification. */
6651 getpkt (&rs->buf, 0);
6652 if (strcmp (rs->buf.data (), "OK") != 0)
6653 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid),
6657 /* All-stop version of target_interrupt. Sends a break or a ^C to
6658 interrupt the remote target. It is undefined which thread of which
6659 process reports the interrupt. */
6662 remote_target::remote_interrupt_as ()
6664 struct remote_state *rs = get_remote_state ();
6666 rs->ctrlc_pending_p = 1;
6668 /* If the inferior is stopped already, but the core didn't know
6669 about it yet, just ignore the request. The cached wait status
6670 will be collected in remote_wait. */
6671 if (rs->cached_wait_status)
6674 /* Send interrupt_sequence to remote target. */
6675 send_interrupt_sequence ();
6678 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6679 the remote target. It is undefined which thread of which process
6680 reports the interrupt. Throws an error if the packet is not
6681 supported by the server. */
6684 remote_target::remote_interrupt_ns ()
6686 struct remote_state *rs = get_remote_state ();
6687 char *p = rs->buf.data ();
6688 char *endp = p + get_remote_packet_size ();
6690 xsnprintf (p, endp - p, "vCtrlC");
6692 /* In non-stop, we get an immediate OK reply. The stop reply will
6693 come in asynchronously by notification. */
6695 getpkt (&rs->buf, 0);
6697 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC]))
6701 case PACKET_UNKNOWN:
6702 error (_("No support for interrupting the remote target."));
6704 error (_("Interrupting target failed: %s"), rs->buf.data ());
6708 /* Implement the to_stop function for the remote targets. */
6711 remote_target::stop (ptid_t ptid)
6714 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
6716 if (target_is_non_stop_p ())
6717 remote_stop_ns (ptid);
6720 /* We don't currently have a way to transparently pause the
6721 remote target in all-stop mode. Interrupt it instead. */
6722 remote_interrupt_as ();
6726 /* Implement the to_interrupt function for the remote targets. */
6729 remote_target::interrupt ()
6732 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
6734 if (target_is_non_stop_p ())
6735 remote_interrupt_ns ();
6737 remote_interrupt_as ();
6740 /* Implement the to_pass_ctrlc function for the remote targets. */
6743 remote_target::pass_ctrlc ()
6745 struct remote_state *rs = get_remote_state ();
6748 fprintf_unfiltered (gdb_stdlog, "remote_pass_ctrlc called\n");
6750 /* If we're starting up, we're not fully synced yet. Quit
6752 if (rs->starting_up)
6754 /* If ^C has already been sent once, offer to disconnect. */
6755 else if (rs->ctrlc_pending_p)
6758 target_interrupt ();
6761 /* Ask the user what to do when an interrupt is received. */
6764 remote_target::interrupt_query ()
6766 struct remote_state *rs = get_remote_state ();
6768 if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p)
6770 if (query (_("The target is not responding to interrupt requests.\n"
6771 "Stop debugging it? ")))
6773 remote_unpush_target ();
6774 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
6779 if (query (_("Interrupted while waiting for the program.\n"
6780 "Give up waiting? ")))
6785 /* Enable/disable target terminal ownership. Most targets can use
6786 terminal groups to control terminal ownership. Remote targets are
6787 different in that explicit transfer of ownership to/from GDB/target
6791 remote_target::terminal_inferior ()
6793 /* NOTE: At this point we could also register our selves as the
6794 recipient of all input. Any characters typed could then be
6795 passed on down to the target. */
6799 remote_target::terminal_ours ()
6804 remote_console_output (const char *msg)
6808 for (p = msg; p[0] && p[1]; p += 2)
6811 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
6815 fputs_unfiltered (tb, gdb_stdtarg);
6817 gdb_flush (gdb_stdtarg);
6820 DEF_VEC_O(cached_reg_t);
6822 typedef struct stop_reply
6824 struct notif_event base;
6826 /* The identifier of the thread about this event */
6829 /* The remote state this event is associated with. When the remote
6830 connection, represented by a remote_state object, is closed,
6831 all the associated stop_reply events should be released. */
6832 struct remote_state *rs;
6834 struct target_waitstatus ws;
6836 /* The architecture associated with the expedited registers. */
6839 /* Expedited registers. This makes remote debugging a bit more
6840 efficient for those targets that provide critical registers as
6841 part of their normal status mechanism (as another roundtrip to
6842 fetch them is avoided). */
6843 VEC(cached_reg_t) *regcache;
6845 enum target_stop_reason stop_reason;
6847 CORE_ADDR watch_data_address;
6853 stop_reply_xfree (struct stop_reply *r)
6855 notif_event_xfree ((struct notif_event *) r);
6858 /* Return the length of the stop reply queue. */
6861 remote_target::stop_reply_queue_length ()
6863 remote_state *rs = get_remote_state ();
6864 return rs->stop_reply_queue.size ();
6868 remote_notif_stop_parse (remote_target *remote,
6869 struct notif_client *self, const char *buf,
6870 struct notif_event *event)
6872 remote->remote_parse_stop_reply (buf, (struct stop_reply *) event);
6876 remote_notif_stop_ack (remote_target *remote,
6877 struct notif_client *self, const char *buf,
6878 struct notif_event *event)
6880 struct stop_reply *stop_reply = (struct stop_reply *) event;
6883 putpkt (remote, self->ack_command);
6885 if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE)
6887 /* We got an unknown stop reply. */
6888 error (_("Unknown stop reply"));
6891 remote->push_stop_reply (stop_reply);
6895 remote_notif_stop_can_get_pending_events (remote_target *remote,
6896 struct notif_client *self)
6898 /* We can't get pending events in remote_notif_process for
6899 notification stop, and we have to do this in remote_wait_ns
6900 instead. If we fetch all queued events from stub, remote stub
6901 may exit and we have no chance to process them back in
6903 remote_state *rs = remote->get_remote_state ();
6904 mark_async_event_handler (rs->remote_async_inferior_event_token);
6909 stop_reply_dtr (struct notif_event *event)
6911 struct stop_reply *r = (struct stop_reply *) event;
6916 VEC_iterate (cached_reg_t, r->regcache, ix, reg);
6920 VEC_free (cached_reg_t, r->regcache);
6923 static struct notif_event *
6924 remote_notif_stop_alloc_reply (void)
6926 /* We cast to a pointer to the "base class". */
6927 struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply);
6929 r->dtr = stop_reply_dtr;
6934 /* A client of notification Stop. */
6936 struct notif_client notif_client_stop =
6940 remote_notif_stop_parse,
6941 remote_notif_stop_ack,
6942 remote_notif_stop_can_get_pending_events,
6943 remote_notif_stop_alloc_reply,
6947 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6948 the pid of the process that owns the threads we want to check, or
6949 -1 if we want to check all threads. */
6952 is_pending_fork_parent (struct target_waitstatus *ws, int event_pid,
6955 if (ws->kind == TARGET_WAITKIND_FORKED
6956 || ws->kind == TARGET_WAITKIND_VFORKED)
6958 if (event_pid == -1 || event_pid == thread_ptid.pid ())
6965 /* Return the thread's pending status used to determine whether the
6966 thread is a fork parent stopped at a fork event. */
6968 static struct target_waitstatus *
6969 thread_pending_fork_status (struct thread_info *thread)
6971 if (thread->suspend.waitstatus_pending_p)
6972 return &thread->suspend.waitstatus;
6974 return &thread->pending_follow;
6977 /* Determine if THREAD is a pending fork parent thread. */
6980 is_pending_fork_parent_thread (struct thread_info *thread)
6982 struct target_waitstatus *ws = thread_pending_fork_status (thread);
6985 return is_pending_fork_parent (ws, pid, thread->ptid);
6988 /* If CONTEXT contains any fork child threads that have not been
6989 reported yet, remove them from the CONTEXT list. If such a
6990 thread exists it is because we are stopped at a fork catchpoint
6991 and have not yet called follow_fork, which will set up the
6992 host-side data structures for the new process. */
6995 remote_target::remove_new_fork_children (threads_listing_context *context)
6998 struct notif_client *notif = ¬if_client_stop;
7000 /* For any threads stopped at a fork event, remove the corresponding
7001 fork child threads from the CONTEXT list. */
7002 for (thread_info *thread : all_non_exited_threads ())
7004 struct target_waitstatus *ws = thread_pending_fork_status (thread);
7006 if (is_pending_fork_parent (ws, pid, thread->ptid))
7007 context->remove_thread (ws->value.related_pid);
7010 /* Check for any pending fork events (not reported or processed yet)
7011 in process PID and remove those fork child threads from the
7012 CONTEXT list as well. */
7013 remote_notif_get_pending_events (notif);
7014 for (auto &event : get_remote_state ()->stop_reply_queue)
7015 if (event->ws.kind == TARGET_WAITKIND_FORKED
7016 || event->ws.kind == TARGET_WAITKIND_VFORKED
7017 || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED)
7018 context->remove_thread (event->ws.value.related_pid);
7021 /* Check whether any event pending in the vStopped queue would prevent
7022 a global or process wildcard vCont action. Clear
7023 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7024 and clear the event inferior's may_wildcard_vcont flag if we can't
7025 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7028 remote_target::check_pending_events_prevent_wildcard_vcont
7029 (int *may_global_wildcard)
7031 struct notif_client *notif = ¬if_client_stop;
7033 remote_notif_get_pending_events (notif);
7034 for (auto &event : get_remote_state ()->stop_reply_queue)
7036 if (event->ws.kind == TARGET_WAITKIND_NO_RESUMED
7037 || event->ws.kind == TARGET_WAITKIND_NO_HISTORY)
7040 if (event->ws.kind == TARGET_WAITKIND_FORKED
7041 || event->ws.kind == TARGET_WAITKIND_VFORKED)
7042 *may_global_wildcard = 0;
7044 struct inferior *inf = find_inferior_ptid (event->ptid);
7046 /* This may be the first time we heard about this process.
7047 Regardless, we must not do a global wildcard resume, otherwise
7048 we'd resume this process too. */
7049 *may_global_wildcard = 0;
7051 get_remote_inferior (inf)->may_wildcard_vcont = false;
7055 /* Discard all pending stop replies of inferior INF. */
7058 remote_target::discard_pending_stop_replies (struct inferior *inf)
7060 struct stop_reply *reply;
7061 struct remote_state *rs = get_remote_state ();
7062 struct remote_notif_state *rns = rs->notif_state;
7064 /* This function can be notified when an inferior exists. When the
7065 target is not remote, the notification state is NULL. */
7066 if (rs->remote_desc == NULL)
7069 reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id];
7071 /* Discard the in-flight notification. */
7072 if (reply != NULL && reply->ptid.pid () == inf->pid)
7074 stop_reply_xfree (reply);
7075 rns->pending_event[notif_client_stop.id] = NULL;
7078 /* Discard the stop replies we have already pulled with
7080 auto iter = std::remove_if (rs->stop_reply_queue.begin (),
7081 rs->stop_reply_queue.end (),
7082 [=] (const stop_reply_up &event)
7084 return event->ptid.pid () == inf->pid;
7086 rs->stop_reply_queue.erase (iter, rs->stop_reply_queue.end ());
7089 /* Discard the stop replies for RS in stop_reply_queue. */
7092 remote_target::discard_pending_stop_replies_in_queue ()
7094 remote_state *rs = get_remote_state ();
7096 /* Discard the stop replies we have already pulled with
7098 auto iter = std::remove_if (rs->stop_reply_queue.begin (),
7099 rs->stop_reply_queue.end (),
7100 [=] (const stop_reply_up &event)
7102 return event->rs == rs;
7104 rs->stop_reply_queue.erase (iter, rs->stop_reply_queue.end ());
7107 /* Remove the first reply in 'stop_reply_queue' which matches
7111 remote_target::remote_notif_remove_queued_reply (ptid_t ptid)
7113 remote_state *rs = get_remote_state ();
7115 auto iter = std::find_if (rs->stop_reply_queue.begin (),
7116 rs->stop_reply_queue.end (),
7117 [=] (const stop_reply_up &event)
7119 return event->ptid.matches (ptid);
7121 struct stop_reply *result;
7122 if (iter == rs->stop_reply_queue.end ())
7126 result = iter->release ();
7127 rs->stop_reply_queue.erase (iter);
7131 fprintf_unfiltered (gdb_stdlog,
7132 "notif: discard queued event: 'Stop' in %s\n",
7133 target_pid_to_str (ptid));
7138 /* Look for a queued stop reply belonging to PTID. If one is found,
7139 remove it from the queue, and return it. Returns NULL if none is
7140 found. If there are still queued events left to process, tell the
7141 event loop to get back to target_wait soon. */
7144 remote_target::queued_stop_reply (ptid_t ptid)
7146 remote_state *rs = get_remote_state ();
7147 struct stop_reply *r = remote_notif_remove_queued_reply (ptid);
7149 if (!rs->stop_reply_queue.empty ())
7151 /* There's still at least an event left. */
7152 mark_async_event_handler (rs->remote_async_inferior_event_token);
7158 /* Push a fully parsed stop reply in the stop reply queue. Since we
7159 know that we now have at least one queued event left to pass to the
7160 core side, tell the event loop to get back to target_wait soon. */
7163 remote_target::push_stop_reply (struct stop_reply *new_event)
7165 remote_state *rs = get_remote_state ();
7166 rs->stop_reply_queue.push_back (stop_reply_up (new_event));
7169 fprintf_unfiltered (gdb_stdlog,
7170 "notif: push 'Stop' %s to queue %d\n",
7171 target_pid_to_str (new_event->ptid),
7172 int (rs->stop_reply_queue.size ()));
7174 mark_async_event_handler (rs->remote_async_inferior_event_token);
7177 /* Returns true if we have a stop reply for PTID. */
7180 remote_target::peek_stop_reply (ptid_t ptid)
7182 remote_state *rs = get_remote_state ();
7183 for (auto &event : rs->stop_reply_queue)
7184 if (ptid == event->ptid
7185 && event->ws.kind == TARGET_WAITKIND_STOPPED)
7190 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7191 starting with P and ending with PEND matches PREFIX. */
7194 strprefix (const char *p, const char *pend, const char *prefix)
7196 for ( ; p < pend; p++, prefix++)
7199 return *prefix == '\0';
7202 /* Parse the stop reply in BUF. Either the function succeeds, and the
7203 result is stored in EVENT, or throws an error. */
7206 remote_target::remote_parse_stop_reply (const char *buf, stop_reply *event)
7208 remote_arch_state *rsa = NULL;
7213 event->ptid = null_ptid;
7214 event->rs = get_remote_state ();
7215 event->ws.kind = TARGET_WAITKIND_IGNORE;
7216 event->ws.value.integer = 0;
7217 event->stop_reason = TARGET_STOPPED_BY_NO_REASON;
7218 event->regcache = NULL;
7223 case 'T': /* Status with PC, SP, FP, ... */
7224 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7225 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7227 n... = register number
7228 r... = register contents
7231 p = &buf[3]; /* after Txx */
7237 p1 = strchr (p, ':');
7239 error (_("Malformed packet(a) (missing colon): %s\n\
7243 error (_("Malformed packet(a) (missing register number): %s\n\
7247 /* Some "registers" are actually extended stop information.
7248 Note if you're adding a new entry here: GDB 7.9 and
7249 earlier assume that all register "numbers" that start
7250 with an hex digit are real register numbers. Make sure
7251 the server only sends such a packet if it knows the
7252 client understands it. */
7254 if (strprefix (p, p1, "thread"))
7255 event->ptid = read_ptid (++p1, &p);
7256 else if (strprefix (p, p1, "syscall_entry"))
7260 event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY;
7261 p = unpack_varlen_hex (++p1, &sysno);
7262 event->ws.value.syscall_number = (int) sysno;
7264 else if (strprefix (p, p1, "syscall_return"))
7268 event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN;
7269 p = unpack_varlen_hex (++p1, &sysno);
7270 event->ws.value.syscall_number = (int) sysno;
7272 else if (strprefix (p, p1, "watch")
7273 || strprefix (p, p1, "rwatch")
7274 || strprefix (p, p1, "awatch"))
7276 event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
7277 p = unpack_varlen_hex (++p1, &addr);
7278 event->watch_data_address = (CORE_ADDR) addr;
7280 else if (strprefix (p, p1, "swbreak"))
7282 event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
7284 /* Make sure the stub doesn't forget to indicate support
7286 if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE)
7287 error (_("Unexpected swbreak stop reason"));
7289 /* The value part is documented as "must be empty",
7290 though we ignore it, in case we ever decide to make
7291 use of it in a backward compatible way. */
7292 p = strchrnul (p1 + 1, ';');
7294 else if (strprefix (p, p1, "hwbreak"))
7296 event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT;
7298 /* Make sure the stub doesn't forget to indicate support
7300 if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE)
7301 error (_("Unexpected hwbreak stop reason"));
7304 p = strchrnul (p1 + 1, ';');
7306 else if (strprefix (p, p1, "library"))
7308 event->ws.kind = TARGET_WAITKIND_LOADED;
7309 p = strchrnul (p1 + 1, ';');
7311 else if (strprefix (p, p1, "replaylog"))
7313 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
7314 /* p1 will indicate "begin" or "end", but it makes
7315 no difference for now, so ignore it. */
7316 p = strchrnul (p1 + 1, ';');
7318 else if (strprefix (p, p1, "core"))
7322 p = unpack_varlen_hex (++p1, &c);
7325 else if (strprefix (p, p1, "fork"))
7327 event->ws.value.related_pid = read_ptid (++p1, &p);
7328 event->ws.kind = TARGET_WAITKIND_FORKED;
7330 else if (strprefix (p, p1, "vfork"))
7332 event->ws.value.related_pid = read_ptid (++p1, &p);
7333 event->ws.kind = TARGET_WAITKIND_VFORKED;
7335 else if (strprefix (p, p1, "vforkdone"))
7337 event->ws.kind = TARGET_WAITKIND_VFORK_DONE;
7338 p = strchrnul (p1 + 1, ';');
7340 else if (strprefix (p, p1, "exec"))
7345 /* Determine the length of the execd pathname. */
7346 p = unpack_varlen_hex (++p1, &ignored);
7347 pathlen = (p - p1) / 2;
7349 /* Save the pathname for event reporting and for
7350 the next run command. */
7351 char *pathname = (char *) xmalloc (pathlen + 1);
7352 struct cleanup *old_chain = make_cleanup (xfree, pathname);
7353 hex2bin (p1, (gdb_byte *) pathname, pathlen);
7354 pathname[pathlen] = '\0';
7355 discard_cleanups (old_chain);
7357 /* This is freed during event handling. */
7358 event->ws.value.execd_pathname = pathname;
7359 event->ws.kind = TARGET_WAITKIND_EXECD;
7361 /* Skip the registers included in this packet, since
7362 they may be for an architecture different from the
7363 one used by the original program. */
7366 else if (strprefix (p, p1, "create"))
7368 event->ws.kind = TARGET_WAITKIND_THREAD_CREATED;
7369 p = strchrnul (p1 + 1, ';');
7378 p = strchrnul (p1 + 1, ';');
7383 /* Maybe a real ``P'' register number. */
7384 p_temp = unpack_varlen_hex (p, &pnum);
7385 /* If the first invalid character is the colon, we got a
7386 register number. Otherwise, it's an unknown stop
7390 /* If we haven't parsed the event's thread yet, find
7391 it now, in order to find the architecture of the
7392 reported expedited registers. */
7393 if (event->ptid == null_ptid)
7395 const char *thr = strstr (p1 + 1, ";thread:");
7397 event->ptid = read_ptid (thr + strlen (";thread:"),
7401 /* Either the current thread hasn't changed,
7402 or the inferior is not multi-threaded.
7403 The event must be for the thread we last
7404 set as (or learned as being) current. */
7405 event->ptid = event->rs->general_thread;
7411 inferior *inf = (event->ptid == null_ptid
7413 : find_inferior_ptid (event->ptid));
7414 /* If this is the first time we learn anything
7415 about this process, skip the registers
7416 included in this packet, since we don't yet
7417 know which architecture to use to parse them.
7418 We'll determine the architecture later when
7419 we process the stop reply and retrieve the
7420 target description, via
7421 remote_notice_new_inferior ->
7422 post_create_inferior. */
7425 p = strchrnul (p1 + 1, ';');
7430 event->arch = inf->gdbarch;
7431 rsa = event->rs->get_remote_arch_state (event->arch);
7435 = packet_reg_from_pnum (event->arch, rsa, pnum);
7436 cached_reg_t cached_reg;
7439 error (_("Remote sent bad register number %s: %s\n\
7441 hex_string (pnum), p, buf);
7443 cached_reg.num = reg->regnum;
7444 cached_reg.data = (gdb_byte *)
7445 xmalloc (register_size (event->arch, reg->regnum));
7448 fieldsize = hex2bin (p, cached_reg.data,
7449 register_size (event->arch, reg->regnum));
7451 if (fieldsize < register_size (event->arch, reg->regnum))
7452 warning (_("Remote reply is too short: %s"), buf);
7454 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
7458 /* Not a number. Silently skip unknown optional
7460 p = strchrnul (p1 + 1, ';');
7465 error (_("Remote register badly formatted: %s\nhere: %s"),
7470 if (event->ws.kind != TARGET_WAITKIND_IGNORE)
7474 case 'S': /* Old style status, just signal only. */
7478 event->ws.kind = TARGET_WAITKIND_STOPPED;
7479 sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
7480 if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST)
7481 event->ws.value.sig = (enum gdb_signal) sig;
7483 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
7486 case 'w': /* Thread exited. */
7490 event->ws.kind = TARGET_WAITKIND_THREAD_EXITED;
7491 p = unpack_varlen_hex (&buf[1], &value);
7492 event->ws.value.integer = value;
7494 error (_("stop reply packet badly formatted: %s"), buf);
7495 event->ptid = read_ptid (++p, NULL);
7498 case 'W': /* Target exited. */
7504 /* GDB used to accept only 2 hex chars here. Stubs should
7505 only send more if they detect GDB supports multi-process
7507 p = unpack_varlen_hex (&buf[1], &value);
7511 /* The remote process exited. */
7512 event->ws.kind = TARGET_WAITKIND_EXITED;
7513 event->ws.value.integer = value;
7517 /* The remote process exited with a signal. */
7518 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
7519 if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST)
7520 event->ws.value.sig = (enum gdb_signal) value;
7522 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
7525 /* If no process is specified, assume inferior_ptid. */
7526 pid = inferior_ptid.pid ();
7535 else if (startswith (p, "process:"))
7539 p += sizeof ("process:") - 1;
7540 unpack_varlen_hex (p, &upid);
7544 error (_("unknown stop reply packet: %s"), buf);
7547 error (_("unknown stop reply packet: %s"), buf);
7548 event->ptid = ptid_t (pid);
7552 event->ws.kind = TARGET_WAITKIND_NO_RESUMED;
7553 event->ptid = minus_one_ptid;
7557 if (target_is_non_stop_p () && event->ptid == null_ptid)
7558 error (_("No process or thread specified in stop reply: %s"), buf);
7561 /* When the stub wants to tell GDB about a new notification reply, it
7562 sends a notification (%Stop, for example). Those can come it at
7563 any time, hence, we have to make sure that any pending
7564 putpkt/getpkt sequence we're making is finished, before querying
7565 the stub for more events with the corresponding ack command
7566 (vStopped, for example). E.g., if we started a vStopped sequence
7567 immediately upon receiving the notification, something like this
7575 1.6) <-- (registers reply to step #1.3)
7577 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7580 To solve this, whenever we parse a %Stop notification successfully,
7581 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7582 doing whatever we were doing:
7588 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7589 2.5) <-- (registers reply to step #2.3)
7591 Eventualy after step #2.5, we return to the event loop, which
7592 notices there's an event on the
7593 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7594 associated callback --- the function below. At this point, we're
7595 always safe to start a vStopped sequence. :
7598 2.7) <-- T05 thread:2
7604 remote_target::remote_notif_get_pending_events (notif_client *nc)
7606 struct remote_state *rs = get_remote_state ();
7608 if (rs->notif_state->pending_event[nc->id] != NULL)
7611 fprintf_unfiltered (gdb_stdlog,
7612 "notif: process: '%s' ack pending event\n",
7616 nc->ack (this, nc, rs->buf.data (),
7617 rs->notif_state->pending_event[nc->id]);
7618 rs->notif_state->pending_event[nc->id] = NULL;
7622 getpkt (&rs->buf, 0);
7623 if (strcmp (rs->buf.data (), "OK") == 0)
7626 remote_notif_ack (this, nc, rs->buf.data ());
7632 fprintf_unfiltered (gdb_stdlog,
7633 "notif: process: '%s' no pending reply\n",
7638 /* Wrapper around remote_target::remote_notif_get_pending_events to
7639 avoid having to export the whole remote_target class. */
7642 remote_notif_get_pending_events (remote_target *remote, notif_client *nc)
7644 remote->remote_notif_get_pending_events (nc);
7647 /* Called when it is decided that STOP_REPLY holds the info of the
7648 event that is to be returned to the core. This function always
7649 destroys STOP_REPLY. */
7652 remote_target::process_stop_reply (struct stop_reply *stop_reply,
7653 struct target_waitstatus *status)
7657 *status = stop_reply->ws;
7658 ptid = stop_reply->ptid;
7660 /* If no thread/process was reported by the stub, assume the current
7662 if (ptid == null_ptid)
7663 ptid = inferior_ptid;
7665 if (status->kind != TARGET_WAITKIND_EXITED
7666 && status->kind != TARGET_WAITKIND_SIGNALLED
7667 && status->kind != TARGET_WAITKIND_NO_RESUMED)
7669 /* Expedited registers. */
7670 if (stop_reply->regcache)
7672 struct regcache *regcache
7673 = get_thread_arch_regcache (ptid, stop_reply->arch);
7678 VEC_iterate (cached_reg_t, stop_reply->regcache, ix, reg);
7681 regcache->raw_supply (reg->num, reg->data);
7685 VEC_free (cached_reg_t, stop_reply->regcache);
7688 remote_notice_new_inferior (ptid, 0);
7689 remote_thread_info *remote_thr = get_remote_thread_info (ptid);
7690 remote_thr->core = stop_reply->core;
7691 remote_thr->stop_reason = stop_reply->stop_reason;
7692 remote_thr->watch_data_address = stop_reply->watch_data_address;
7693 remote_thr->vcont_resumed = 0;
7696 stop_reply_xfree (stop_reply);
7700 /* The non-stop mode version of target_wait. */
7703 remote_target::wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
7705 struct remote_state *rs = get_remote_state ();
7706 struct stop_reply *stop_reply;
7710 /* If in non-stop mode, get out of getpkt even if a
7711 notification is received. */
7713 ret = getpkt_or_notif_sane (&rs->buf, 0 /* forever */, &is_notif);
7716 if (ret != -1 && !is_notif)
7719 case 'E': /* Error of some sort. */
7720 /* We're out of sync with the target now. Did it continue
7721 or not? We can't tell which thread it was in non-stop,
7722 so just ignore this. */
7723 warning (_("Remote failure reply: %s"), rs->buf.data ());
7725 case 'O': /* Console output. */
7726 remote_console_output (&rs->buf[1]);
7729 warning (_("Invalid remote reply: %s"), rs->buf.data ());
7733 /* Acknowledge a pending stop reply that may have arrived in the
7735 if (rs->notif_state->pending_event[notif_client_stop.id] != NULL)
7736 remote_notif_get_pending_events (¬if_client_stop);
7738 /* If indeed we noticed a stop reply, we're done. */
7739 stop_reply = queued_stop_reply (ptid);
7740 if (stop_reply != NULL)
7741 return process_stop_reply (stop_reply, status);
7743 /* Still no event. If we're just polling for an event, then
7744 return to the event loop. */
7745 if (options & TARGET_WNOHANG)
7747 status->kind = TARGET_WAITKIND_IGNORE;
7748 return minus_one_ptid;
7751 /* Otherwise do a blocking wait. */
7752 ret = getpkt_or_notif_sane (&rs->buf, 1 /* forever */, &is_notif);
7756 /* Wait until the remote machine stops, then return, storing status in
7757 STATUS just as `wait' would. */
7760 remote_target::wait_as (ptid_t ptid, target_waitstatus *status, int options)
7762 struct remote_state *rs = get_remote_state ();
7763 ptid_t event_ptid = null_ptid;
7765 struct stop_reply *stop_reply;
7769 status->kind = TARGET_WAITKIND_IGNORE;
7770 status->value.integer = 0;
7772 stop_reply = queued_stop_reply (ptid);
7773 if (stop_reply != NULL)
7774 return process_stop_reply (stop_reply, status);
7776 if (rs->cached_wait_status)
7777 /* Use the cached wait status, but only once. */
7778 rs->cached_wait_status = 0;
7783 int forever = ((options & TARGET_WNOHANG) == 0
7784 && rs->wait_forever_enabled_p);
7786 if (!rs->waiting_for_stop_reply)
7788 status->kind = TARGET_WAITKIND_NO_RESUMED;
7789 return minus_one_ptid;
7792 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7793 _never_ wait for ever -> test on target_is_async_p().
7794 However, before we do that we need to ensure that the caller
7795 knows how to take the target into/out of async mode. */
7796 ret = getpkt_or_notif_sane (&rs->buf, forever, &is_notif);
7798 /* GDB gets a notification. Return to core as this event is
7800 if (ret != -1 && is_notif)
7801 return minus_one_ptid;
7803 if (ret == -1 && (options & TARGET_WNOHANG) != 0)
7804 return minus_one_ptid;
7807 buf = rs->buf.data ();
7809 /* Assume that the target has acknowledged Ctrl-C unless we receive
7810 an 'F' or 'O' packet. */
7811 if (buf[0] != 'F' && buf[0] != 'O')
7812 rs->ctrlc_pending_p = 0;
7816 case 'E': /* Error of some sort. */
7817 /* We're out of sync with the target now. Did it continue or
7818 not? Not is more likely, so report a stop. */
7819 rs->waiting_for_stop_reply = 0;
7821 warning (_("Remote failure reply: %s"), buf);
7822 status->kind = TARGET_WAITKIND_STOPPED;
7823 status->value.sig = GDB_SIGNAL_0;
7825 case 'F': /* File-I/O request. */
7826 /* GDB may access the inferior memory while handling the File-I/O
7827 request, but we don't want GDB accessing memory while waiting
7828 for a stop reply. See the comments in putpkt_binary. Set
7829 waiting_for_stop_reply to 0 temporarily. */
7830 rs->waiting_for_stop_reply = 0;
7831 remote_fileio_request (this, buf, rs->ctrlc_pending_p);
7832 rs->ctrlc_pending_p = 0;
7833 /* GDB handled the File-I/O request, and the target is running
7834 again. Keep waiting for events. */
7835 rs->waiting_for_stop_reply = 1;
7837 case 'N': case 'T': case 'S': case 'X': case 'W':
7839 /* There is a stop reply to handle. */
7840 rs->waiting_for_stop_reply = 0;
7843 = (struct stop_reply *) remote_notif_parse (this,
7847 event_ptid = process_stop_reply (stop_reply, status);
7850 case 'O': /* Console output. */
7851 remote_console_output (buf + 1);
7854 if (rs->last_sent_signal != GDB_SIGNAL_0)
7856 /* Zero length reply means that we tried 'S' or 'C' and the
7857 remote system doesn't support it. */
7858 target_terminal::ours_for_output ();
7860 ("Can't send signals to this remote system. %s not sent.\n",
7861 gdb_signal_to_name (rs->last_sent_signal));
7862 rs->last_sent_signal = GDB_SIGNAL_0;
7863 target_terminal::inferior ();
7865 strcpy (buf, rs->last_sent_step ? "s" : "c");
7871 warning (_("Invalid remote reply: %s"), buf);
7875 if (status->kind == TARGET_WAITKIND_NO_RESUMED)
7876 return minus_one_ptid;
7877 else if (status->kind == TARGET_WAITKIND_IGNORE)
7879 /* Nothing interesting happened. If we're doing a non-blocking
7880 poll, we're done. Otherwise, go back to waiting. */
7881 if (options & TARGET_WNOHANG)
7882 return minus_one_ptid;
7886 else if (status->kind != TARGET_WAITKIND_EXITED
7887 && status->kind != TARGET_WAITKIND_SIGNALLED)
7889 if (event_ptid != null_ptid)
7890 record_currthread (rs, event_ptid);
7892 event_ptid = inferior_ptid;
7895 /* A process exit. Invalidate our notion of current thread. */
7896 record_currthread (rs, minus_one_ptid);
7901 /* Wait until the remote machine stops, then return, storing status in
7902 STATUS just as `wait' would. */
7905 remote_target::wait (ptid_t ptid, struct target_waitstatus *status, int options)
7909 if (target_is_non_stop_p ())
7910 event_ptid = wait_ns (ptid, status, options);
7912 event_ptid = wait_as (ptid, status, options);
7914 if (target_is_async_p ())
7916 remote_state *rs = get_remote_state ();
7918 /* If there are are events left in the queue tell the event loop
7920 if (!rs->stop_reply_queue.empty ())
7921 mark_async_event_handler (rs->remote_async_inferior_event_token);
7927 /* Fetch a single register using a 'p' packet. */
7930 remote_target::fetch_register_using_p (struct regcache *regcache,
7933 struct gdbarch *gdbarch = regcache->arch ();
7934 struct remote_state *rs = get_remote_state ();
7936 gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum));
7939 if (packet_support (PACKET_p) == PACKET_DISABLE)
7942 if (reg->pnum == -1)
7945 p = rs->buf.data ();
7947 p += hexnumstr (p, reg->pnum);
7950 getpkt (&rs->buf, 0);
7952 buf = rs->buf.data ();
7954 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_p]))
7958 case PACKET_UNKNOWN:
7961 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7962 gdbarch_register_name (regcache->arch (),
7967 /* If this register is unfetchable, tell the regcache. */
7970 regcache->raw_supply (reg->regnum, NULL);
7974 /* Otherwise, parse and supply the value. */
7980 error (_("fetch_register_using_p: early buf termination"));
7982 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
7985 regcache->raw_supply (reg->regnum, regp);
7989 /* Fetch the registers included in the target's 'g' packet. */
7992 remote_target::send_g_packet ()
7994 struct remote_state *rs = get_remote_state ();
7997 xsnprintf (rs->buf.data (), get_remote_packet_size (), "g");
7999 getpkt (&rs->buf, 0);
8000 if (packet_check_result (rs->buf) == PACKET_ERROR)
8001 error (_("Could not read registers; remote failure reply '%s'"),
8004 /* We can get out of synch in various cases. If the first character
8005 in the buffer is not a hex character, assume that has happened
8006 and try to fetch another packet to read. */
8007 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
8008 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
8009 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
8010 && rs->buf[0] != 'x') /* New: unavailable register value. */
8013 fprintf_unfiltered (gdb_stdlog,
8014 "Bad register packet; fetching a new packet\n");
8015 getpkt (&rs->buf, 0);
8018 buf_len = strlen (rs->buf.data ());
8020 /* Sanity check the received packet. */
8021 if (buf_len % 2 != 0)
8022 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf.data ());
8028 remote_target::process_g_packet (struct regcache *regcache)
8030 struct gdbarch *gdbarch = regcache->arch ();
8031 struct remote_state *rs = get_remote_state ();
8032 remote_arch_state *rsa = rs->get_remote_arch_state (gdbarch);
8037 buf_len = strlen (rs->buf.data ());
8039 /* Further sanity checks, with knowledge of the architecture. */
8040 if (buf_len > 2 * rsa->sizeof_g_packet)
8041 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8043 rsa->sizeof_g_packet, buf_len / 2,
8046 /* Save the size of the packet sent to us by the target. It is used
8047 as a heuristic when determining the max size of packets that the
8048 target can safely receive. */
8049 if (rsa->actual_register_packet_size == 0)
8050 rsa->actual_register_packet_size = buf_len;
8052 /* If this is smaller than we guessed the 'g' packet would be,
8053 update our records. A 'g' reply that doesn't include a register's
8054 value implies either that the register is not available, or that
8055 the 'p' packet must be used. */
8056 if (buf_len < 2 * rsa->sizeof_g_packet)
8058 long sizeof_g_packet = buf_len / 2;
8060 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8062 long offset = rsa->regs[i].offset;
8063 long reg_size = register_size (gdbarch, i);
8065 if (rsa->regs[i].pnum == -1)
8068 if (offset >= sizeof_g_packet)
8069 rsa->regs[i].in_g_packet = 0;
8070 else if (offset + reg_size > sizeof_g_packet)
8071 error (_("Truncated register %d in remote 'g' packet"), i);
8073 rsa->regs[i].in_g_packet = 1;
8076 /* Looks valid enough, we can assume this is the correct length
8077 for a 'g' packet. It's important not to adjust
8078 rsa->sizeof_g_packet if we have truncated registers otherwise
8079 this "if" won't be run the next time the method is called
8080 with a packet of the same size and one of the internal errors
8081 below will trigger instead. */
8082 rsa->sizeof_g_packet = sizeof_g_packet;
8085 regs = (char *) alloca (rsa->sizeof_g_packet);
8087 /* Unimplemented registers read as all bits zero. */
8088 memset (regs, 0, rsa->sizeof_g_packet);
8090 /* Reply describes registers byte by byte, each byte encoded as two
8091 hex characters. Suck them all up, then supply them to the
8092 register cacheing/storage mechanism. */
8094 p = rs->buf.data ();
8095 for (i = 0; i < rsa->sizeof_g_packet; i++)
8097 if (p[0] == 0 || p[1] == 0)
8098 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8099 internal_error (__FILE__, __LINE__,
8100 _("unexpected end of 'g' packet reply"));
8102 if (p[0] == 'x' && p[1] == 'x')
8103 regs[i] = 0; /* 'x' */
8105 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
8109 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8111 struct packet_reg *r = &rsa->regs[i];
8112 long reg_size = register_size (gdbarch, i);
8116 if ((r->offset + reg_size) * 2 > strlen (rs->buf.data ()))
8117 /* This shouldn't happen - we adjusted in_g_packet above. */
8118 internal_error (__FILE__, __LINE__,
8119 _("unexpected end of 'g' packet reply"));
8120 else if (rs->buf[r->offset * 2] == 'x')
8122 gdb_assert (r->offset * 2 < strlen (rs->buf.data ()));
8123 /* The register isn't available, mark it as such (at
8124 the same time setting the value to zero). */
8125 regcache->raw_supply (r->regnum, NULL);
8128 regcache->raw_supply (r->regnum, regs + r->offset);
8134 remote_target::fetch_registers_using_g (struct regcache *regcache)
8137 process_g_packet (regcache);
8140 /* Make the remote selected traceframe match GDB's selected
8144 remote_target::set_remote_traceframe ()
8147 struct remote_state *rs = get_remote_state ();
8149 if (rs->remote_traceframe_number == get_traceframe_number ())
8152 /* Avoid recursion, remote_trace_find calls us again. */
8153 rs->remote_traceframe_number = get_traceframe_number ();
8155 newnum = target_trace_find (tfind_number,
8156 get_traceframe_number (), 0, 0, NULL);
8158 /* Should not happen. If it does, all bets are off. */
8159 if (newnum != get_traceframe_number ())
8160 warning (_("could not set remote traceframe"));
8164 remote_target::fetch_registers (struct regcache *regcache, int regnum)
8166 struct gdbarch *gdbarch = regcache->arch ();
8167 struct remote_state *rs = get_remote_state ();
8168 remote_arch_state *rsa = rs->get_remote_arch_state (gdbarch);
8171 set_remote_traceframe ();
8172 set_general_thread (regcache->ptid ());
8176 packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum);
8178 gdb_assert (reg != NULL);
8180 /* If this register might be in the 'g' packet, try that first -
8181 we are likely to read more than one register. If this is the
8182 first 'g' packet, we might be overly optimistic about its
8183 contents, so fall back to 'p'. */
8184 if (reg->in_g_packet)
8186 fetch_registers_using_g (regcache);
8187 if (reg->in_g_packet)
8191 if (fetch_register_using_p (regcache, reg))
8194 /* This register is not available. */
8195 regcache->raw_supply (reg->regnum, NULL);
8200 fetch_registers_using_g (regcache);
8202 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8203 if (!rsa->regs[i].in_g_packet)
8204 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
8206 /* This register is not available. */
8207 regcache->raw_supply (i, NULL);
8211 /* Prepare to store registers. Since we may send them all (using a
8212 'G' request), we have to read out the ones we don't want to change
8216 remote_target::prepare_to_store (struct regcache *regcache)
8218 struct remote_state *rs = get_remote_state ();
8219 remote_arch_state *rsa = rs->get_remote_arch_state (regcache->arch ());
8222 /* Make sure the entire registers array is valid. */
8223 switch (packet_support (PACKET_P))
8225 case PACKET_DISABLE:
8226 case PACKET_SUPPORT_UNKNOWN:
8227 /* Make sure all the necessary registers are cached. */
8228 for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++)
8229 if (rsa->regs[i].in_g_packet)
8230 regcache->raw_update (rsa->regs[i].regnum);
8237 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8238 packet was not recognized. */
8241 remote_target::store_register_using_P (const struct regcache *regcache,
8244 struct gdbarch *gdbarch = regcache->arch ();
8245 struct remote_state *rs = get_remote_state ();
8246 /* Try storing a single register. */
8247 char *buf = rs->buf.data ();
8248 gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum));
8251 if (packet_support (PACKET_P) == PACKET_DISABLE)
8254 if (reg->pnum == -1)
8257 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
8258 p = buf + strlen (buf);
8259 regcache->raw_collect (reg->regnum, regp);
8260 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
8262 getpkt (&rs->buf, 0);
8264 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
8269 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8270 gdbarch_register_name (gdbarch, reg->regnum), rs->buf.data ());
8271 case PACKET_UNKNOWN:
8274 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
8278 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8279 contents of the register cache buffer. FIXME: ignores errors. */
8282 remote_target::store_registers_using_G (const struct regcache *regcache)
8284 struct remote_state *rs = get_remote_state ();
8285 remote_arch_state *rsa = rs->get_remote_arch_state (regcache->arch ());
8289 /* Extract all the registers in the regcache copying them into a
8294 regs = (gdb_byte *) alloca (rsa->sizeof_g_packet);
8295 memset (regs, 0, rsa->sizeof_g_packet);
8296 for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++)
8298 struct packet_reg *r = &rsa->regs[i];
8301 regcache->raw_collect (r->regnum, regs + r->offset);
8305 /* Command describes registers byte by byte,
8306 each byte encoded as two hex characters. */
8307 p = rs->buf.data ();
8309 bin2hex (regs, p, rsa->sizeof_g_packet);
8311 getpkt (&rs->buf, 0);
8312 if (packet_check_result (rs->buf) == PACKET_ERROR)
8313 error (_("Could not write registers; remote failure reply '%s'"),
8317 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8318 of the register cache buffer. FIXME: ignores errors. */
8321 remote_target::store_registers (struct regcache *regcache, int regnum)
8323 struct gdbarch *gdbarch = regcache->arch ();
8324 struct remote_state *rs = get_remote_state ();
8325 remote_arch_state *rsa = rs->get_remote_arch_state (gdbarch);
8328 set_remote_traceframe ();
8329 set_general_thread (regcache->ptid ());
8333 packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum);
8335 gdb_assert (reg != NULL);
8337 /* Always prefer to store registers using the 'P' packet if
8338 possible; we often change only a small number of registers.
8339 Sometimes we change a larger number; we'd need help from a
8340 higher layer to know to use 'G'. */
8341 if (store_register_using_P (regcache, reg))
8344 /* For now, don't complain if we have no way to write the
8345 register. GDB loses track of unavailable registers too
8346 easily. Some day, this may be an error. We don't have
8347 any way to read the register, either... */
8348 if (!reg->in_g_packet)
8351 store_registers_using_G (regcache);
8355 store_registers_using_G (regcache);
8357 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8358 if (!rsa->regs[i].in_g_packet)
8359 if (!store_register_using_P (regcache, &rsa->regs[i]))
8360 /* See above for why we do not issue an error here. */
8365 /* Return the number of hex digits in num. */
8368 hexnumlen (ULONGEST num)
8372 for (i = 0; num != 0; i++)
8375 return std::max (i, 1);
8378 /* Set BUF to the minimum number of hex digits representing NUM. */
8381 hexnumstr (char *buf, ULONGEST num)
8383 int len = hexnumlen (num);
8385 return hexnumnstr (buf, num, len);
8389 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8392 hexnumnstr (char *buf, ULONGEST num, int width)
8398 for (i = width - 1; i >= 0; i--)
8400 buf[i] = "0123456789abcdef"[(num & 0xf)];
8407 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8410 remote_address_masked (CORE_ADDR addr)
8412 unsigned int address_size = remote_address_size;
8414 /* If "remoteaddresssize" was not set, default to target address size. */
8416 address_size = gdbarch_addr_bit (target_gdbarch ());
8418 if (address_size > 0
8419 && address_size < (sizeof (ULONGEST) * 8))
8421 /* Only create a mask when that mask can safely be constructed
8422 in a ULONGEST variable. */
8425 mask = (mask << address_size) - 1;
8431 /* Determine whether the remote target supports binary downloading.
8432 This is accomplished by sending a no-op memory write of zero length
8433 to the target at the specified address. It does not suffice to send
8434 the whole packet, since many stubs strip the eighth bit and
8435 subsequently compute a wrong checksum, which causes real havoc with
8438 NOTE: This can still lose if the serial line is not eight-bit
8439 clean. In cases like this, the user should clear "remote
8443 remote_target::check_binary_download (CORE_ADDR addr)
8445 struct remote_state *rs = get_remote_state ();
8447 switch (packet_support (PACKET_X))
8449 case PACKET_DISABLE:
8453 case PACKET_SUPPORT_UNKNOWN:
8457 p = rs->buf.data ();
8459 p += hexnumstr (p, (ULONGEST) addr);
8461 p += hexnumstr (p, (ULONGEST) 0);
8465 putpkt_binary (rs->buf.data (), (int) (p - rs->buf.data ()));
8466 getpkt (&rs->buf, 0);
8468 if (rs->buf[0] == '\0')
8471 fprintf_unfiltered (gdb_stdlog,
8472 "binary downloading NOT "
8473 "supported by target\n");
8474 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
8479 fprintf_unfiltered (gdb_stdlog,
8480 "binary downloading supported by target\n");
8481 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
8488 /* Helper function to resize the payload in order to try to get a good
8489 alignment. We try to write an amount of data such that the next write will
8490 start on an address aligned on REMOTE_ALIGN_WRITES. */
8493 align_for_efficient_write (int todo, CORE_ADDR memaddr)
8495 return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
8498 /* Write memory data directly to the remote machine.
8499 This does not inform the data cache; the data cache uses this.
8500 HEADER is the starting part of the packet.
8501 MEMADDR is the address in the remote memory space.
8502 MYADDR is the address of the buffer in our space.
8503 LEN_UNITS is the number of addressable units to write.
8504 UNIT_SIZE is the length in bytes of an addressable unit.
8505 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8506 should send data as binary ('X'), or hex-encoded ('M').
8508 The function creates packet of the form
8509 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8511 where encoding of <DATA> is terminated by PACKET_FORMAT.
8513 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8516 Return the transferred status, error or OK (an
8517 'enum target_xfer_status' value). Save the number of addressable units
8518 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8520 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8521 exchange between gdb and the stub could look like (?? in place of the
8527 -> $M1000,3:eeeeffffeeee#??
8531 <- eeeeffffeeeedddd */
8534 remote_target::remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
8535 const gdb_byte *myaddr,
8538 ULONGEST *xfered_len_units,
8539 char packet_format, int use_length)
8541 struct remote_state *rs = get_remote_state ();
8547 int payload_capacity_bytes;
8548 int payload_length_bytes;
8550 if (packet_format != 'X' && packet_format != 'M')
8551 internal_error (__FILE__, __LINE__,
8552 _("remote_write_bytes_aux: bad packet format"));
8555 return TARGET_XFER_EOF;
8557 payload_capacity_bytes = get_memory_write_packet_size ();
8559 /* The packet buffer will be large enough for the payload;
8560 get_memory_packet_size ensures this. */
8563 /* Compute the size of the actual payload by subtracting out the
8564 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8566 payload_capacity_bytes -= strlen ("$,:#NN");
8568 /* The comma won't be used. */
8569 payload_capacity_bytes += 1;
8570 payload_capacity_bytes -= strlen (header);
8571 payload_capacity_bytes -= hexnumlen (memaddr);
8573 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8575 strcat (rs->buf.data (), header);
8576 p = rs->buf.data () + strlen (header);
8578 /* Compute a best guess of the number of bytes actually transfered. */
8579 if (packet_format == 'X')
8581 /* Best guess at number of bytes that will fit. */
8582 todo_units = std::min (len_units,
8583 (ULONGEST) payload_capacity_bytes / unit_size);
8585 payload_capacity_bytes -= hexnumlen (todo_units);
8586 todo_units = std::min (todo_units, payload_capacity_bytes / unit_size);
8590 /* Number of bytes that will fit. */
8592 = std::min (len_units,
8593 (ULONGEST) (payload_capacity_bytes / unit_size) / 2);
8595 payload_capacity_bytes -= hexnumlen (todo_units);
8596 todo_units = std::min (todo_units,
8597 (payload_capacity_bytes / unit_size) / 2);
8600 if (todo_units <= 0)
8601 internal_error (__FILE__, __LINE__,
8602 _("minimum packet size too small to write data"));
8604 /* If we already need another packet, then try to align the end
8605 of this packet to a useful boundary. */
8606 if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units)
8607 todo_units = align_for_efficient_write (todo_units, memaddr);
8609 /* Append "<memaddr>". */
8610 memaddr = remote_address_masked (memaddr);
8611 p += hexnumstr (p, (ULONGEST) memaddr);
8618 /* Append the length and retain its location and size. It may need to be
8619 adjusted once the packet body has been created. */
8621 plenlen = hexnumstr (p, (ULONGEST) todo_units);
8629 /* Append the packet body. */
8630 if (packet_format == 'X')
8632 /* Binary mode. Send target system values byte by byte, in
8633 increasing byte addresses. Only escape certain critical
8635 payload_length_bytes =
8636 remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p,
8637 &units_written, payload_capacity_bytes);
8639 /* If not all TODO units fit, then we'll need another packet. Make
8640 a second try to keep the end of the packet aligned. Don't do
8641 this if the packet is tiny. */
8642 if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES)
8646 new_todo_units = align_for_efficient_write (units_written, memaddr);
8648 if (new_todo_units != units_written)
8649 payload_length_bytes =
8650 remote_escape_output (myaddr, new_todo_units, unit_size,
8651 (gdb_byte *) p, &units_written,
8652 payload_capacity_bytes);
8655 p += payload_length_bytes;
8656 if (use_length && units_written < todo_units)
8658 /* Escape chars have filled up the buffer prematurely,
8659 and we have actually sent fewer units than planned.
8660 Fix-up the length field of the packet. Use the same
8661 number of characters as before. */
8662 plen += hexnumnstr (plen, (ULONGEST) units_written,
8664 *plen = ':'; /* overwrite \0 from hexnumnstr() */
8669 /* Normal mode: Send target system values byte by byte, in
8670 increasing byte addresses. Each byte is encoded as a two hex
8672 p += 2 * bin2hex (myaddr, p, todo_units * unit_size);
8673 units_written = todo_units;
8676 putpkt_binary (rs->buf.data (), (int) (p - rs->buf.data ()));
8677 getpkt (&rs->buf, 0);
8679 if (rs->buf[0] == 'E')
8680 return TARGET_XFER_E_IO;
8682 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8683 send fewer units than we'd planned. */
8684 *xfered_len_units = (ULONGEST) units_written;
8685 return (*xfered_len_units != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
8688 /* Write memory data directly to the remote machine.
8689 This does not inform the data cache; the data cache uses this.
8690 MEMADDR is the address in the remote memory space.
8691 MYADDR is the address of the buffer in our space.
8692 LEN is the number of bytes.
8694 Return the transferred status, error or OK (an
8695 'enum target_xfer_status' value). Save the number of bytes
8696 transferred in *XFERED_LEN. Only transfer a single packet. */
8699 remote_target::remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr,
8700 ULONGEST len, int unit_size,
8701 ULONGEST *xfered_len)
8703 const char *packet_format = NULL;
8705 /* Check whether the target supports binary download. */
8706 check_binary_download (memaddr);
8708 switch (packet_support (PACKET_X))
8711 packet_format = "X";
8713 case PACKET_DISABLE:
8714 packet_format = "M";
8716 case PACKET_SUPPORT_UNKNOWN:
8717 internal_error (__FILE__, __LINE__,
8718 _("remote_write_bytes: bad internal state"));
8720 internal_error (__FILE__, __LINE__, _("bad switch"));
8723 return remote_write_bytes_aux (packet_format,
8724 memaddr, myaddr, len, unit_size, xfered_len,
8725 packet_format[0], 1);
8728 /* Read memory data directly from the remote machine.
8729 This does not use the data cache; the data cache uses this.
8730 MEMADDR is the address in the remote memory space.
8731 MYADDR is the address of the buffer in our space.
8732 LEN_UNITS is the number of addressable memory units to read..
8733 UNIT_SIZE is the length in bytes of an addressable unit.
8735 Return the transferred status, error or OK (an
8736 'enum target_xfer_status' value). Save the number of bytes
8737 transferred in *XFERED_LEN_UNITS.
8739 See the comment of remote_write_bytes_aux for an example of
8740 memory read/write exchange between gdb and the stub. */
8743 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr,
8745 int unit_size, ULONGEST *xfered_len_units)
8747 struct remote_state *rs = get_remote_state ();
8748 int buf_size_bytes; /* Max size of packet output buffer. */
8753 buf_size_bytes = get_memory_read_packet_size ();
8754 /* The packet buffer will be large enough for the payload;
8755 get_memory_packet_size ensures this. */
8757 /* Number of units that will fit. */
8758 todo_units = std::min (len_units,
8759 (ULONGEST) (buf_size_bytes / unit_size) / 2);
8761 /* Construct "m"<memaddr>","<len>". */
8762 memaddr = remote_address_masked (memaddr);
8763 p = rs->buf.data ();
8765 p += hexnumstr (p, (ULONGEST) memaddr);
8767 p += hexnumstr (p, (ULONGEST) todo_units);
8770 getpkt (&rs->buf, 0);
8771 if (rs->buf[0] == 'E'
8772 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
8773 && rs->buf[3] == '\0')
8774 return TARGET_XFER_E_IO;
8775 /* Reply describes memory byte by byte, each byte encoded as two hex
8777 p = rs->buf.data ();
8778 decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size);
8779 /* Return what we have. Let higher layers handle partial reads. */
8780 *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size);
8781 return (*xfered_len_units != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
8784 /* Using the set of read-only target sections of remote, read live
8787 For interface/parameters/return description see target.h,
8791 remote_target::remote_xfer_live_readonly_partial (gdb_byte *readbuf,
8795 ULONGEST *xfered_len)
8797 struct target_section *secp;
8798 struct target_section_table *table;
8800 secp = target_section_by_addr (this, memaddr);
8802 && (bfd_get_section_flags (secp->the_bfd_section->owner,
8803 secp->the_bfd_section)
8806 struct target_section *p;
8807 ULONGEST memend = memaddr + len;
8809 table = target_get_section_table (this);
8811 for (p = table->sections; p < table->sections_end; p++)
8813 if (memaddr >= p->addr)
8815 if (memend <= p->endaddr)
8817 /* Entire transfer is within this section. */
8818 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
8821 else if (memaddr >= p->endaddr)
8823 /* This section ends before the transfer starts. */
8828 /* This section overlaps the transfer. Just do half. */
8829 len = p->endaddr - memaddr;
8830 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
8837 return TARGET_XFER_EOF;
8840 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8841 first if the requested memory is unavailable in traceframe.
8842 Otherwise, fall back to remote_read_bytes_1. */
8845 remote_target::remote_read_bytes (CORE_ADDR memaddr,
8846 gdb_byte *myaddr, ULONGEST len, int unit_size,
8847 ULONGEST *xfered_len)
8850 return TARGET_XFER_EOF;
8852 if (get_traceframe_number () != -1)
8854 std::vector<mem_range> available;
8856 /* If we fail to get the set of available memory, then the
8857 target does not support querying traceframe info, and so we
8858 attempt reading from the traceframe anyway (assuming the
8859 target implements the old QTro packet then). */
8860 if (traceframe_available_memory (&available, memaddr, len))
8862 if (available.empty () || available[0].start != memaddr)
8864 enum target_xfer_status res;
8866 /* Don't read into the traceframe's available
8868 if (!available.empty ())
8870 LONGEST oldlen = len;
8872 len = available[0].start - memaddr;
8873 gdb_assert (len <= oldlen);
8876 /* This goes through the topmost target again. */
8877 res = remote_xfer_live_readonly_partial (myaddr, memaddr,
8878 len, unit_size, xfered_len);
8879 if (res == TARGET_XFER_OK)
8880 return TARGET_XFER_OK;
8883 /* No use trying further, we know some memory starting
8884 at MEMADDR isn't available. */
8886 return (*xfered_len != 0) ?
8887 TARGET_XFER_UNAVAILABLE : TARGET_XFER_EOF;
8891 /* Don't try to read more than how much is available, in
8892 case the target implements the deprecated QTro packet to
8893 cater for older GDBs (the target's knowledge of read-only
8894 sections may be outdated by now). */
8895 len = available[0].length;
8899 return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len);
8904 /* Sends a packet with content determined by the printf format string
8905 FORMAT and the remaining arguments, then gets the reply. Returns
8906 whether the packet was a success, a failure, or unknown. */
8909 remote_target::remote_send_printf (const char *format, ...)
8911 struct remote_state *rs = get_remote_state ();
8912 int max_size = get_remote_packet_size ();
8915 va_start (ap, format);
8918 int size = vsnprintf (rs->buf.data (), max_size, format, ap);
8922 if (size >= max_size)
8923 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
8925 if (putpkt (rs->buf) < 0)
8926 error (_("Communication problem with target."));
8929 getpkt (&rs->buf, 0);
8931 return packet_check_result (rs->buf);
8934 /* Flash writing can take quite some time. We'll set
8935 effectively infinite timeout for flash operations.
8936 In future, we'll need to decide on a better approach. */
8937 static const int remote_flash_timeout = 1000;
8940 remote_target::flash_erase (ULONGEST address, LONGEST length)
8942 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
8943 enum packet_result ret;
8944 scoped_restore restore_timeout
8945 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8947 ret = remote_send_printf ("vFlashErase:%s,%s",
8948 phex (address, addr_size),
8952 case PACKET_UNKNOWN:
8953 error (_("Remote target does not support flash erase"));
8955 error (_("Error erasing flash with vFlashErase packet"));
8962 remote_target::remote_flash_write (ULONGEST address,
8963 ULONGEST length, ULONGEST *xfered_len,
8964 const gdb_byte *data)
8966 scoped_restore restore_timeout
8967 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8968 return remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1,
8973 remote_target::flash_done ()
8977 scoped_restore restore_timeout
8978 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8980 ret = remote_send_printf ("vFlashDone");
8984 case PACKET_UNKNOWN:
8985 error (_("Remote target does not support vFlashDone"));
8987 error (_("Error finishing flash operation"));
8994 remote_target::files_info ()
8996 puts_filtered ("Debugging a target over a serial line.\n");
8999 /* Stuff for dealing with the packets which are part of this protocol.
9000 See comment at top of file for details. */
9002 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9003 error to higher layers. Called when a serial error is detected.
9004 The exception message is STRING, followed by a colon and a blank,
9005 the system error message for errno at function entry and final dot
9006 for output compatibility with throw_perror_with_name. */
9009 unpush_and_perror (const char *string)
9011 int saved_errno = errno;
9013 remote_unpush_target ();
9014 throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string,
9015 safe_strerror (saved_errno));
9018 /* Read a single character from the remote end. The current quit
9019 handler is overridden to avoid quitting in the middle of packet
9020 sequence, as that would break communication with the remote server.
9021 See remote_serial_quit_handler for more detail. */
9024 remote_target::readchar (int timeout)
9027 struct remote_state *rs = get_remote_state ();
9030 scoped_restore restore_quit_target
9031 = make_scoped_restore (&curr_quit_handler_target, this);
9032 scoped_restore restore_quit
9033 = make_scoped_restore (&quit_handler, ::remote_serial_quit_handler);
9035 rs->got_ctrlc_during_io = 0;
9037 ch = serial_readchar (rs->remote_desc, timeout);
9039 if (rs->got_ctrlc_during_io)
9046 switch ((enum serial_rc) ch)
9049 remote_unpush_target ();
9050 throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed"));
9053 unpush_and_perror (_("Remote communication error. "
9054 "Target disconnected."));
9056 case SERIAL_TIMEOUT:
9062 /* Wrapper for serial_write that closes the target and throws if
9063 writing fails. The current quit handler is overridden to avoid
9064 quitting in the middle of packet sequence, as that would break
9065 communication with the remote server. See
9066 remote_serial_quit_handler for more detail. */
9069 remote_target::remote_serial_write (const char *str, int len)
9071 struct remote_state *rs = get_remote_state ();
9073 scoped_restore restore_quit_target
9074 = make_scoped_restore (&curr_quit_handler_target, this);
9075 scoped_restore restore_quit
9076 = make_scoped_restore (&quit_handler, ::remote_serial_quit_handler);
9078 rs->got_ctrlc_during_io = 0;
9080 if (serial_write (rs->remote_desc, str, len))
9082 unpush_and_perror (_("Remote communication error. "
9083 "Target disconnected."));
9086 if (rs->got_ctrlc_during_io)
9090 /* Return a string representing an escaped version of BUF, of len N.
9091 E.g. \n is converted to \\n, \t to \\t, etc. */
9094 escape_buffer (const char *buf, int n)
9098 stb.putstrn (buf, n, '\\');
9099 return std::move (stb.string ());
9102 /* Display a null-terminated packet on stdout, for debugging, using C
9106 print_packet (const char *buf)
9108 puts_filtered ("\"");
9109 fputstr_filtered (buf, '"', gdb_stdout);
9110 puts_filtered ("\"");
9114 remote_target::putpkt (const char *buf)
9116 return putpkt_binary (buf, strlen (buf));
9119 /* Wrapper around remote_target::putpkt to avoid exporting
9123 putpkt (remote_target *remote, const char *buf)
9125 return remote->putpkt (buf);
9128 /* Send a packet to the remote machine, with error checking. The data
9129 of the packet is in BUF. The string in BUF can be at most
9130 get_remote_packet_size () - 5 to account for the $, # and checksum,
9131 and for a possible /0 if we are debugging (remote_debug) and want
9132 to print the sent packet as a string. */
9135 remote_target::putpkt_binary (const char *buf, int cnt)
9137 struct remote_state *rs = get_remote_state ();
9139 unsigned char csum = 0;
9140 gdb::def_vector<char> data (cnt + 6);
9141 char *buf2 = data.data ();
9147 /* Catch cases like trying to read memory or listing threads while
9148 we're waiting for a stop reply. The remote server wouldn't be
9149 ready to handle this request, so we'd hang and timeout. We don't
9150 have to worry about this in synchronous mode, because in that
9151 case it's not possible to issue a command while the target is
9152 running. This is not a problem in non-stop mode, because in that
9153 case, the stub is always ready to process serial input. */
9154 if (!target_is_non_stop_p ()
9155 && target_is_async_p ()
9156 && rs->waiting_for_stop_reply)
9158 error (_("Cannot execute this command while the target is running.\n"
9159 "Use the \"interrupt\" command to stop the target\n"
9160 "and then try again."));
9163 /* We're sending out a new packet. Make sure we don't look at a
9164 stale cached response. */
9165 rs->cached_wait_status = 0;
9167 /* Copy the packet into buffer BUF2, encapsulating it
9168 and giving it a checksum. */
9173 for (i = 0; i < cnt; i++)
9179 *p++ = tohex ((csum >> 4) & 0xf);
9180 *p++ = tohex (csum & 0xf);
9182 /* Send it over and over until we get a positive ack. */
9186 int started_error_output = 0;
9192 int len = (int) (p - buf2);
9195 = escape_buffer (buf2, std::min (len, REMOTE_DEBUG_MAX_CHAR));
9197 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s", str.c_str ());
9199 if (len > REMOTE_DEBUG_MAX_CHAR)
9200 fprintf_unfiltered (gdb_stdlog, "[%d bytes omitted]",
9201 len - REMOTE_DEBUG_MAX_CHAR);
9203 fprintf_unfiltered (gdb_stdlog, "...");
9205 gdb_flush (gdb_stdlog);
9207 remote_serial_write (buf2, p - buf2);
9209 /* If this is a no acks version of the remote protocol, send the
9210 packet and move on. */
9214 /* Read until either a timeout occurs (-2) or '+' is read.
9215 Handle any notification that arrives in the mean time. */
9218 ch = readchar (remote_timeout);
9226 case SERIAL_TIMEOUT:
9229 if (started_error_output)
9231 putchar_unfiltered ('\n');
9232 started_error_output = 0;
9241 fprintf_unfiltered (gdb_stdlog, "Ack\n");
9245 fprintf_unfiltered (gdb_stdlog, "Nak\n");
9247 case SERIAL_TIMEOUT:
9251 break; /* Retransmit buffer. */
9255 fprintf_unfiltered (gdb_stdlog,
9256 "Packet instead of Ack, ignoring it\n");
9257 /* It's probably an old response sent because an ACK
9258 was lost. Gobble up the packet and ack it so it
9259 doesn't get retransmitted when we resend this
9262 remote_serial_write ("+", 1);
9263 continue; /* Now, go look for +. */
9270 /* If we got a notification, handle it, and go back to looking
9272 /* We've found the start of a notification. Now
9273 collect the data. */
9274 val = read_frame (&rs->buf);
9279 std::string str = escape_buffer (rs->buf.data (), val);
9281 fprintf_unfiltered (gdb_stdlog,
9282 " Notification received: %s\n",
9285 handle_notification (rs->notif_state, rs->buf.data ());
9286 /* We're in sync now, rewait for the ack. */
9293 if (!started_error_output)
9295 started_error_output = 1;
9296 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
9298 fputc_unfiltered (ch & 0177, gdb_stdlog);
9299 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf.data ());
9308 if (!started_error_output)
9310 started_error_output = 1;
9311 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
9313 fputc_unfiltered (ch & 0177, gdb_stdlog);
9317 break; /* Here to retransmit. */
9321 /* This is wrong. If doing a long backtrace, the user should be
9322 able to get out next time we call QUIT, without anything as
9323 violent as interrupt_query. If we want to provide a way out of
9324 here without getting to the next QUIT, it should be based on
9325 hitting ^C twice as in remote_wait. */
9337 /* Come here after finding the start of a frame when we expected an
9338 ack. Do our best to discard the rest of this packet. */
9341 remote_target::skip_frame ()
9347 c = readchar (remote_timeout);
9350 case SERIAL_TIMEOUT:
9351 /* Nothing we can do. */
9354 /* Discard the two bytes of checksum and stop. */
9355 c = readchar (remote_timeout);
9357 c = readchar (remote_timeout);
9360 case '*': /* Run length encoding. */
9361 /* Discard the repeat count. */
9362 c = readchar (remote_timeout);
9367 /* A regular character. */
9373 /* Come here after finding the start of the frame. Collect the rest
9374 into *BUF, verifying the checksum, length, and handling run-length
9375 compression. NUL terminate the buffer. If there is not enough room,
9378 Returns -1 on error, number of characters in buffer (ignoring the
9379 trailing NULL) on success. (could be extended to return one of the
9380 SERIAL status indications). */
9383 remote_target::read_frame (gdb::char_vector *buf_p)
9388 char *buf = buf_p->data ();
9389 struct remote_state *rs = get_remote_state ();
9396 c = readchar (remote_timeout);
9399 case SERIAL_TIMEOUT:
9401 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
9405 fputs_filtered ("Saw new packet start in middle of old one\n",
9407 return -1; /* Start a new packet, count retries. */
9410 unsigned char pktcsum;
9416 check_0 = readchar (remote_timeout);
9418 check_1 = readchar (remote_timeout);
9420 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
9423 fputs_filtered ("Timeout in checksum, retrying\n",
9427 else if (check_0 < 0 || check_1 < 0)
9430 fputs_filtered ("Communication error in checksum\n",
9435 /* Don't recompute the checksum; with no ack packets we
9436 don't have any way to indicate a packet retransmission
9441 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
9442 if (csum == pktcsum)
9447 std::string str = escape_buffer (buf, bc);
9449 fprintf_unfiltered (gdb_stdlog,
9450 "Bad checksum, sentsum=0x%x, "
9451 "csum=0x%x, buf=%s\n",
9452 pktcsum, csum, str.c_str ());
9454 /* Number of characters in buffer ignoring trailing
9458 case '*': /* Run length encoding. */
9463 c = readchar (remote_timeout);
9465 repeat = c - ' ' + 3; /* Compute repeat count. */
9467 /* The character before ``*'' is repeated. */
9469 if (repeat > 0 && repeat <= 255 && bc > 0)
9471 if (bc + repeat - 1 >= buf_p->size () - 1)
9473 /* Make some more room in the buffer. */
9474 buf_p->resize (buf_p->size () + repeat);
9475 buf = buf_p->data ();
9478 memset (&buf[bc], buf[bc - 1], repeat);
9484 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
9488 if (bc >= buf_p->size () - 1)
9490 /* Make some more room in the buffer. */
9491 buf_p->resize (buf_p->size () * 2);
9492 buf = buf_p->data ();
9502 /* Read a packet from the remote machine, with error checking, and
9503 store it in *BUF. Resize *BUF if necessary to hold the result. If
9504 FOREVER, wait forever rather than timing out; this is used (in
9505 synchronous mode) to wait for a target that is is executing user
9507 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9508 don't have to change all the calls to getpkt to deal with the
9509 return value, because at the moment I don't know what the right
9510 thing to do it for those. */
9513 remote_target::getpkt (gdb::char_vector *buf, int forever)
9515 getpkt_sane (buf, forever);
9519 /* Read a packet from the remote machine, with error checking, and
9520 store it in *BUF. Resize *BUF if necessary to hold the result. If
9521 FOREVER, wait forever rather than timing out; this is used (in
9522 synchronous mode) to wait for a target that is is executing user
9523 code to stop. If FOREVER == 0, this function is allowed to time
9524 out gracefully and return an indication of this to the caller.
9525 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9526 consider receiving a notification enough reason to return to the
9527 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9528 holds a notification or not (a regular packet). */
9531 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector *buf,
9532 int forever, int expecting_notif,
9535 struct remote_state *rs = get_remote_state ();
9541 /* We're reading a new response. Make sure we don't look at a
9542 previously cached response. */
9543 rs->cached_wait_status = 0;
9545 strcpy (buf->data (), "timeout");
9548 timeout = watchdog > 0 ? watchdog : -1;
9549 else if (expecting_notif)
9550 timeout = 0; /* There should already be a char in the buffer. If
9553 timeout = remote_timeout;
9557 /* Process any number of notifications, and then return when
9561 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9563 for (tries = 1; tries <= MAX_TRIES; tries++)
9565 /* This can loop forever if the remote side sends us
9566 characters continuously, but if it pauses, we'll get
9567 SERIAL_TIMEOUT from readchar because of timeout. Then
9568 we'll count that as a retry.
9570 Note that even when forever is set, we will only wait
9571 forever prior to the start of a packet. After that, we
9572 expect characters to arrive at a brisk pace. They should
9573 show up within remote_timeout intervals. */
9575 c = readchar (timeout);
9576 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
9578 if (c == SERIAL_TIMEOUT)
9580 if (expecting_notif)
9581 return -1; /* Don't complain, it's normal to not get
9582 anything in this case. */
9584 if (forever) /* Watchdog went off? Kill the target. */
9586 remote_unpush_target ();
9587 throw_error (TARGET_CLOSE_ERROR,
9588 _("Watchdog timeout has expired. "
9589 "Target detached."));
9592 fputs_filtered ("Timed out.\n", gdb_stdlog);
9596 /* We've found the start of a packet or notification.
9597 Now collect the data. */
9598 val = read_frame (buf);
9603 remote_serial_write ("-", 1);
9606 if (tries > MAX_TRIES)
9608 /* We have tried hard enough, and just can't receive the
9609 packet/notification. Give up. */
9610 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9612 /* Skip the ack char if we're in no-ack mode. */
9613 if (!rs->noack_mode)
9614 remote_serial_write ("+", 1);
9618 /* If we got an ordinary packet, return that to our caller. */
9624 = escape_buffer (buf->data (),
9625 std::min (val, REMOTE_DEBUG_MAX_CHAR));
9627 fprintf_unfiltered (gdb_stdlog, "Packet received: %s",
9630 if (val > REMOTE_DEBUG_MAX_CHAR)
9631 fprintf_unfiltered (gdb_stdlog, "[%d bytes omitted]",
9632 val - REMOTE_DEBUG_MAX_CHAR);
9634 fprintf_unfiltered (gdb_stdlog, "\n");
9637 /* Skip the ack char if we're in no-ack mode. */
9638 if (!rs->noack_mode)
9639 remote_serial_write ("+", 1);
9640 if (is_notif != NULL)
9645 /* If we got a notification, handle it, and go back to looking
9649 gdb_assert (c == '%');
9653 std::string str = escape_buffer (buf->data (), val);
9655 fprintf_unfiltered (gdb_stdlog,
9656 " Notification received: %s\n",
9659 if (is_notif != NULL)
9662 handle_notification (rs->notif_state, buf->data ());
9664 /* Notifications require no acknowledgement. */
9666 if (expecting_notif)
9673 remote_target::getpkt_sane (gdb::char_vector *buf, int forever)
9675 return getpkt_or_notif_sane_1 (buf, forever, 0, NULL);
9679 remote_target::getpkt_or_notif_sane (gdb::char_vector *buf, int forever,
9682 return getpkt_or_notif_sane_1 (buf, forever, 1, is_notif);
9685 /* Kill any new fork children of process PID that haven't been
9686 processed by follow_fork. */
9689 remote_target::kill_new_fork_children (int pid)
9691 remote_state *rs = get_remote_state ();
9692 struct notif_client *notif = ¬if_client_stop;
9694 /* Kill the fork child threads of any threads in process PID
9695 that are stopped at a fork event. */
9696 for (thread_info *thread : all_non_exited_threads ())
9698 struct target_waitstatus *ws = &thread->pending_follow;
9700 if (is_pending_fork_parent (ws, pid, thread->ptid))
9702 int child_pid = ws->value.related_pid.pid ();
9705 res = remote_vkill (child_pid);
9707 error (_("Can't kill fork child process %d"), child_pid);
9711 /* Check for any pending fork events (not reported or processed yet)
9712 in process PID and kill those fork child threads as well. */
9713 remote_notif_get_pending_events (notif);
9714 for (auto &event : rs->stop_reply_queue)
9715 if (is_pending_fork_parent (&event->ws, pid, event->ptid))
9717 int child_pid = event->ws.value.related_pid.pid ();
9720 res = remote_vkill (child_pid);
9722 error (_("Can't kill fork child process %d"), child_pid);
9727 /* Target hook to kill the current inferior. */
9730 remote_target::kill ()
9733 int pid = inferior_ptid.pid ();
9734 struct remote_state *rs = get_remote_state ();
9736 if (packet_support (PACKET_vKill) != PACKET_DISABLE)
9738 /* If we're stopped while forking and we haven't followed yet,
9739 kill the child task. We need to do this before killing the
9740 parent task because if this is a vfork then the parent will
9742 kill_new_fork_children (pid);
9744 res = remote_vkill (pid);
9747 target_mourn_inferior (inferior_ptid);
9752 /* If we are in 'target remote' mode and we are killing the only
9753 inferior, then we will tell gdbserver to exit and unpush the
9755 if (res == -1 && !remote_multi_process_p (rs)
9756 && number_of_live_inferiors () == 1)
9760 /* We've killed the remote end, we get to mourn it. If we are
9761 not in extended mode, mourning the inferior also unpushes
9762 remote_ops from the target stack, which closes the remote
9764 target_mourn_inferior (inferior_ptid);
9769 error (_("Can't kill process"));
9772 /* Send a kill request to the target using the 'vKill' packet. */
9775 remote_target::remote_vkill (int pid)
9777 if (packet_support (PACKET_vKill) == PACKET_DISABLE)
9780 remote_state *rs = get_remote_state ();
9782 /* Tell the remote target to detach. */
9783 xsnprintf (rs->buf.data (), get_remote_packet_size (), "vKill;%x", pid);
9785 getpkt (&rs->buf, 0);
9787 switch (packet_ok (rs->buf,
9788 &remote_protocol_packets[PACKET_vKill]))
9794 case PACKET_UNKNOWN:
9797 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
9801 /* Send a kill request to the target using the 'k' packet. */
9804 remote_target::remote_kill_k ()
9806 /* Catch errors so the user can quit from gdb even when we
9807 aren't on speaking terms with the remote system. */
9812 CATCH (ex, RETURN_MASK_ERROR)
9814 if (ex.error == TARGET_CLOSE_ERROR)
9816 /* If we got an (EOF) error that caused the target
9817 to go away, then we're done, that's what we wanted.
9818 "k" is susceptible to cause a premature EOF, given
9819 that the remote server isn't actually required to
9820 reply to "k", and it can happen that it doesn't
9821 even get to reply ACK to the "k". */
9825 /* Otherwise, something went wrong. We didn't actually kill
9826 the target. Just propagate the exception, and let the
9827 user or higher layers decide what to do. */
9828 throw_exception (ex);
9834 remote_target::mourn_inferior ()
9836 struct remote_state *rs = get_remote_state ();
9838 /* We're no longer interested in notification events of an inferior
9839 that exited or was killed/detached. */
9840 discard_pending_stop_replies (current_inferior ());
9842 /* In 'target remote' mode with one inferior, we close the connection. */
9843 if (!rs->extended && number_of_live_inferiors () <= 1)
9845 unpush_target (this);
9847 /* remote_close takes care of doing most of the clean up. */
9848 generic_mourn_inferior ();
9852 /* In case we got here due to an error, but we're going to stay
9854 rs->waiting_for_stop_reply = 0;
9856 /* If the current general thread belonged to the process we just
9857 detached from or has exited, the remote side current general
9858 thread becomes undefined. Considering a case like this:
9860 - We just got here due to a detach.
9861 - The process that we're detaching from happens to immediately
9862 report a global breakpoint being hit in non-stop mode, in the
9863 same thread we had selected before.
9864 - GDB attaches to this process again.
9865 - This event happens to be the next event we handle.
9867 GDB would consider that the current general thread didn't need to
9868 be set on the stub side (with Hg), since for all it knew,
9869 GENERAL_THREAD hadn't changed.
9871 Notice that although in all-stop mode, the remote server always
9872 sets the current thread to the thread reporting the stop event,
9873 that doesn't happen in non-stop mode; in non-stop, the stub *must
9874 not* change the current thread when reporting a breakpoint hit,
9875 due to the decoupling of event reporting and event handling.
9877 To keep things simple, we always invalidate our notion of the
9879 record_currthread (rs, minus_one_ptid);
9881 /* Call common code to mark the inferior as not running. */
9882 generic_mourn_inferior ();
9884 if (!have_inferiors ())
9886 if (!remote_multi_process_p (rs))
9888 /* Check whether the target is running now - some remote stubs
9889 automatically restart after kill. */
9891 getpkt (&rs->buf, 0);
9893 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
9895 /* Assume that the target has been restarted. Set
9896 inferior_ptid so that bits of core GDB realizes
9897 there's something here, e.g., so that the user can
9898 say "kill" again. */
9899 inferior_ptid = magic_null_ptid;
9906 extended_remote_target::supports_disable_randomization ()
9908 return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE;
9912 remote_target::extended_remote_disable_randomization (int val)
9914 struct remote_state *rs = get_remote_state ();
9917 xsnprintf (rs->buf.data (), get_remote_packet_size (),
9918 "QDisableRandomization:%x", val);
9920 reply = remote_get_noisy_reply ();
9922 error (_("Target does not support QDisableRandomization."));
9923 if (strcmp (reply, "OK") != 0)
9924 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
9928 remote_target::extended_remote_run (const std::string &args)
9930 struct remote_state *rs = get_remote_state ();
9932 const char *remote_exec_file = get_remote_exec_file ();
9934 /* If the user has disabled vRun support, or we have detected that
9935 support is not available, do not try it. */
9936 if (packet_support (PACKET_vRun) == PACKET_DISABLE)
9939 strcpy (rs->buf.data (), "vRun;");
9940 len = strlen (rs->buf.data ());
9942 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
9943 error (_("Remote file name too long for run packet"));
9944 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf.data () + len,
9945 strlen (remote_exec_file));
9951 gdb_argv argv (args.c_str ());
9952 for (i = 0; argv[i] != NULL; i++)
9954 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
9955 error (_("Argument list too long for run packet"));
9956 rs->buf[len++] = ';';
9957 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf.data () + len,
9962 rs->buf[len++] = '\0';
9965 getpkt (&rs->buf, 0);
9967 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]))
9970 /* We have a wait response. All is well. */
9972 case PACKET_UNKNOWN:
9975 if (remote_exec_file[0] == '\0')
9976 error (_("Running the default executable on the remote target failed; "
9977 "try \"set remote exec-file\"?"));
9979 error (_("Running \"%s\" on the remote target failed"),
9982 gdb_assert_not_reached (_("bad switch"));
9986 /* Helper function to send set/unset environment packets. ACTION is
9987 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9988 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9992 remote_target::send_environment_packet (const char *action,
9996 remote_state *rs = get_remote_state ();
9998 /* Convert the environment variable to an hex string, which
9999 is the best format to be transmitted over the wire. */
10000 std::string encoded_value = bin2hex ((const gdb_byte *) value,
10003 xsnprintf (rs->buf.data (), get_remote_packet_size (),
10004 "%s:%s", packet, encoded_value.c_str ());
10007 getpkt (&rs->buf, 0);
10008 if (strcmp (rs->buf.data (), "OK") != 0)
10009 warning (_("Unable to %s environment variable '%s' on remote."),
10013 /* Helper function to handle the QEnvironment* packets. */
10016 remote_target::extended_remote_environment_support ()
10018 remote_state *rs = get_remote_state ();
10020 if (packet_support (PACKET_QEnvironmentReset) != PACKET_DISABLE)
10022 putpkt ("QEnvironmentReset");
10023 getpkt (&rs->buf, 0);
10024 if (strcmp (rs->buf.data (), "OK") != 0)
10025 warning (_("Unable to reset environment on remote."));
10028 gdb_environ *e = ¤t_inferior ()->environment;
10030 if (packet_support (PACKET_QEnvironmentHexEncoded) != PACKET_DISABLE)
10031 for (const std::string &el : e->user_set_env ())
10032 send_environment_packet ("set", "QEnvironmentHexEncoded",
10035 if (packet_support (PACKET_QEnvironmentUnset) != PACKET_DISABLE)
10036 for (const std::string &el : e->user_unset_env ())
10037 send_environment_packet ("unset", "QEnvironmentUnset", el.c_str ());
10040 /* Helper function to set the current working directory for the
10041 inferior in the remote target. */
10044 remote_target::extended_remote_set_inferior_cwd ()
10046 if (packet_support (PACKET_QSetWorkingDir) != PACKET_DISABLE)
10048 const char *inferior_cwd = get_inferior_cwd ();
10049 remote_state *rs = get_remote_state ();
10051 if (inferior_cwd != NULL)
10053 std::string hexpath = bin2hex ((const gdb_byte *) inferior_cwd,
10054 strlen (inferior_cwd));
10056 xsnprintf (rs->buf.data (), get_remote_packet_size (),
10057 "QSetWorkingDir:%s", hexpath.c_str ());
10061 /* An empty inferior_cwd means that the user wants us to
10062 reset the remote server's inferior's cwd. */
10063 xsnprintf (rs->buf.data (), get_remote_packet_size (),
10064 "QSetWorkingDir:");
10068 getpkt (&rs->buf, 0);
10069 if (packet_ok (rs->buf,
10070 &remote_protocol_packets[PACKET_QSetWorkingDir])
10073 Remote replied unexpectedly while setting the inferior's working\n\
10080 /* In the extended protocol we want to be able to do things like
10081 "run" and have them basically work as expected. So we need
10082 a special create_inferior function. We support changing the
10083 executable file and the command line arguments, but not the
10087 extended_remote_target::create_inferior (const char *exec_file,
10088 const std::string &args,
10089 char **env, int from_tty)
10093 struct remote_state *rs = get_remote_state ();
10094 const char *remote_exec_file = get_remote_exec_file ();
10096 /* If running asynchronously, register the target file descriptor
10097 with the event loop. */
10098 if (target_can_async_p ())
10101 /* Disable address space randomization if requested (and supported). */
10102 if (supports_disable_randomization ())
10103 extended_remote_disable_randomization (disable_randomization);
10105 /* If startup-with-shell is on, we inform gdbserver to start the
10106 remote inferior using a shell. */
10107 if (packet_support (PACKET_QStartupWithShell) != PACKET_DISABLE)
10109 xsnprintf (rs->buf.data (), get_remote_packet_size (),
10110 "QStartupWithShell:%d", startup_with_shell ? 1 : 0);
10112 getpkt (&rs->buf, 0);
10113 if (strcmp (rs->buf.data (), "OK") != 0)
10115 Remote replied unexpectedly while setting startup-with-shell: %s"),
10119 extended_remote_environment_support ();
10121 extended_remote_set_inferior_cwd ();
10123 /* Now restart the remote server. */
10124 run_worked = extended_remote_run (args) != -1;
10127 /* vRun was not supported. Fail if we need it to do what the
10129 if (remote_exec_file[0])
10130 error (_("Remote target does not support \"set remote exec-file\""));
10131 if (!args.empty ())
10132 error (_("Remote target does not support \"set args\" or run ARGS"));
10134 /* Fall back to "R". */
10135 extended_remote_restart ();
10138 /* vRun's success return is a stop reply. */
10139 stop_reply = run_worked ? rs->buf.data () : NULL;
10140 add_current_inferior_and_thread (stop_reply);
10142 /* Get updated offsets, if the stub uses qOffsets. */
10147 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10148 the list of conditions (in agent expression bytecode format), if any, the
10149 target needs to evaluate. The output is placed into the packet buffer
10150 started from BUF and ended at BUF_END. */
10153 remote_add_target_side_condition (struct gdbarch *gdbarch,
10154 struct bp_target_info *bp_tgt, char *buf,
10157 if (bp_tgt->conditions.empty ())
10160 buf += strlen (buf);
10161 xsnprintf (buf, buf_end - buf, "%s", ";");
10164 /* Send conditions to the target. */
10165 for (agent_expr *aexpr : bp_tgt->conditions)
10167 xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
10168 buf += strlen (buf);
10169 for (int i = 0; i < aexpr->len; ++i)
10170 buf = pack_hex_byte (buf, aexpr->buf[i]);
10177 remote_add_target_side_commands (struct gdbarch *gdbarch,
10178 struct bp_target_info *bp_tgt, char *buf)
10180 if (bp_tgt->tcommands.empty ())
10183 buf += strlen (buf);
10185 sprintf (buf, ";cmds:%x,", bp_tgt->persist);
10186 buf += strlen (buf);
10188 /* Concatenate all the agent expressions that are commands into the
10190 for (agent_expr *aexpr : bp_tgt->tcommands)
10192 sprintf (buf, "X%x,", aexpr->len);
10193 buf += strlen (buf);
10194 for (int i = 0; i < aexpr->len; ++i)
10195 buf = pack_hex_byte (buf, aexpr->buf[i]);
10200 /* Insert a breakpoint. On targets that have software breakpoint
10201 support, we ask the remote target to do the work; on targets
10202 which don't, we insert a traditional memory breakpoint. */
10205 remote_target::insert_breakpoint (struct gdbarch *gdbarch,
10206 struct bp_target_info *bp_tgt)
10208 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10209 If it succeeds, then set the support to PACKET_ENABLE. If it
10210 fails, and the user has explicitly requested the Z support then
10211 report an error, otherwise, mark it disabled and go on. */
10213 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
10215 CORE_ADDR addr = bp_tgt->reqstd_address;
10216 struct remote_state *rs;
10219 /* Make sure the remote is pointing at the right process, if
10221 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10222 set_general_process ();
10224 rs = get_remote_state ();
10225 p = rs->buf.data ();
10226 endbuf = p + get_remote_packet_size ();
10231 addr = (ULONGEST) remote_address_masked (addr);
10232 p += hexnumstr (p, addr);
10233 xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
10235 if (supports_evaluation_of_breakpoint_conditions ())
10236 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
10238 if (can_run_breakpoint_commands ())
10239 remote_add_target_side_commands (gdbarch, bp_tgt, p);
10242 getpkt (&rs->buf, 0);
10244 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
10250 case PACKET_UNKNOWN:
10255 /* If this breakpoint has target-side commands but this stub doesn't
10256 support Z0 packets, throw error. */
10257 if (!bp_tgt->tcommands.empty ())
10258 throw_error (NOT_SUPPORTED_ERROR, _("\
10259 Target doesn't support breakpoints that have target side commands."));
10261 return memory_insert_breakpoint (this, gdbarch, bp_tgt);
10265 remote_target::remove_breakpoint (struct gdbarch *gdbarch,
10266 struct bp_target_info *bp_tgt,
10267 enum remove_bp_reason reason)
10269 CORE_ADDR addr = bp_tgt->placed_address;
10270 struct remote_state *rs = get_remote_state ();
10272 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
10274 char *p = rs->buf.data ();
10275 char *endbuf = p + get_remote_packet_size ();
10277 /* Make sure the remote is pointing at the right process, if
10279 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10280 set_general_process ();
10286 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
10287 p += hexnumstr (p, addr);
10288 xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
10291 getpkt (&rs->buf, 0);
10293 return (rs->buf[0] == 'E');
10296 return memory_remove_breakpoint (this, gdbarch, bp_tgt, reason);
10299 static enum Z_packet_type
10300 watchpoint_to_Z_packet (int type)
10305 return Z_PACKET_WRITE_WP;
10308 return Z_PACKET_READ_WP;
10311 return Z_PACKET_ACCESS_WP;
10314 internal_error (__FILE__, __LINE__,
10315 _("hw_bp_to_z: bad watchpoint type %d"), type);
10320 remote_target::insert_watchpoint (CORE_ADDR addr, int len,
10321 enum target_hw_bp_type type, struct expression *cond)
10323 struct remote_state *rs = get_remote_state ();
10324 char *endbuf = rs->buf.data () + get_remote_packet_size ();
10326 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
10328 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
10331 /* Make sure the remote is pointing at the right process, if
10333 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10334 set_general_process ();
10336 xsnprintf (rs->buf.data (), endbuf - rs->buf.data (), "Z%x,", packet);
10337 p = strchr (rs->buf.data (), '\0');
10338 addr = remote_address_masked (addr);
10339 p += hexnumstr (p, (ULONGEST) addr);
10340 xsnprintf (p, endbuf - p, ",%x", len);
10343 getpkt (&rs->buf, 0);
10345 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
10349 case PACKET_UNKNOWN:
10354 internal_error (__FILE__, __LINE__,
10355 _("remote_insert_watchpoint: reached end of function"));
10359 remote_target::watchpoint_addr_within_range (CORE_ADDR addr,
10360 CORE_ADDR start, int length)
10362 CORE_ADDR diff = remote_address_masked (addr - start);
10364 return diff < length;
10369 remote_target::remove_watchpoint (CORE_ADDR addr, int len,
10370 enum target_hw_bp_type type, struct expression *cond)
10372 struct remote_state *rs = get_remote_state ();
10373 char *endbuf = rs->buf.data () + get_remote_packet_size ();
10375 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
10377 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
10380 /* Make sure the remote is pointing at the right process, if
10382 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10383 set_general_process ();
10385 xsnprintf (rs->buf.data (), endbuf - rs->buf.data (), "z%x,", packet);
10386 p = strchr (rs->buf.data (), '\0');
10387 addr = remote_address_masked (addr);
10388 p += hexnumstr (p, (ULONGEST) addr);
10389 xsnprintf (p, endbuf - p, ",%x", len);
10391 getpkt (&rs->buf, 0);
10393 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
10396 case PACKET_UNKNOWN:
10401 internal_error (__FILE__, __LINE__,
10402 _("remote_remove_watchpoint: reached end of function"));
10406 int remote_hw_watchpoint_limit = -1;
10407 int remote_hw_watchpoint_length_limit = -1;
10408 int remote_hw_breakpoint_limit = -1;
10411 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
10413 if (remote_hw_watchpoint_length_limit == 0)
10415 else if (remote_hw_watchpoint_length_limit < 0)
10417 else if (len <= remote_hw_watchpoint_length_limit)
10424 remote_target::can_use_hw_breakpoint (enum bptype type, int cnt, int ot)
10426 if (type == bp_hardware_breakpoint)
10428 if (remote_hw_breakpoint_limit == 0)
10430 else if (remote_hw_breakpoint_limit < 0)
10432 else if (cnt <= remote_hw_breakpoint_limit)
10437 if (remote_hw_watchpoint_limit == 0)
10439 else if (remote_hw_watchpoint_limit < 0)
10443 else if (cnt <= remote_hw_watchpoint_limit)
10449 /* The to_stopped_by_sw_breakpoint method of target remote. */
10452 remote_target::stopped_by_sw_breakpoint ()
10454 struct thread_info *thread = inferior_thread ();
10456 return (thread->priv != NULL
10457 && (get_remote_thread_info (thread)->stop_reason
10458 == TARGET_STOPPED_BY_SW_BREAKPOINT));
10461 /* The to_supports_stopped_by_sw_breakpoint method of target
10465 remote_target::supports_stopped_by_sw_breakpoint ()
10467 return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE);
10470 /* The to_stopped_by_hw_breakpoint method of target remote. */
10473 remote_target::stopped_by_hw_breakpoint ()
10475 struct thread_info *thread = inferior_thread ();
10477 return (thread->priv != NULL
10478 && (get_remote_thread_info (thread)->stop_reason
10479 == TARGET_STOPPED_BY_HW_BREAKPOINT));
10482 /* The to_supports_stopped_by_hw_breakpoint method of target
10486 remote_target::supports_stopped_by_hw_breakpoint ()
10488 return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE);
10492 remote_target::stopped_by_watchpoint ()
10494 struct thread_info *thread = inferior_thread ();
10496 return (thread->priv != NULL
10497 && (get_remote_thread_info (thread)->stop_reason
10498 == TARGET_STOPPED_BY_WATCHPOINT));
10502 remote_target::stopped_data_address (CORE_ADDR *addr_p)
10504 struct thread_info *thread = inferior_thread ();
10506 if (thread->priv != NULL
10507 && (get_remote_thread_info (thread)->stop_reason
10508 == TARGET_STOPPED_BY_WATCHPOINT))
10510 *addr_p = get_remote_thread_info (thread)->watch_data_address;
10519 remote_target::insert_hw_breakpoint (struct gdbarch *gdbarch,
10520 struct bp_target_info *bp_tgt)
10522 CORE_ADDR addr = bp_tgt->reqstd_address;
10523 struct remote_state *rs;
10527 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
10530 /* Make sure the remote is pointing at the right process, if
10532 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10533 set_general_process ();
10535 rs = get_remote_state ();
10536 p = rs->buf.data ();
10537 endbuf = p + get_remote_packet_size ();
10543 addr = remote_address_masked (addr);
10544 p += hexnumstr (p, (ULONGEST) addr);
10545 xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
10547 if (supports_evaluation_of_breakpoint_conditions ())
10548 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
10550 if (can_run_breakpoint_commands ())
10551 remote_add_target_side_commands (gdbarch, bp_tgt, p);
10554 getpkt (&rs->buf, 0);
10556 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
10559 if (rs->buf[1] == '.')
10561 message = strchr (&rs->buf[2], '.');
10563 error (_("Remote failure reply: %s"), message + 1);
10566 case PACKET_UNKNOWN:
10571 internal_error (__FILE__, __LINE__,
10572 _("remote_insert_hw_breakpoint: reached end of function"));
10577 remote_target::remove_hw_breakpoint (struct gdbarch *gdbarch,
10578 struct bp_target_info *bp_tgt)
10581 struct remote_state *rs = get_remote_state ();
10582 char *p = rs->buf.data ();
10583 char *endbuf = p + get_remote_packet_size ();
10585 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
10588 /* Make sure the remote is pointing at the right process, if
10590 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10591 set_general_process ();
10597 addr = remote_address_masked (bp_tgt->placed_address);
10598 p += hexnumstr (p, (ULONGEST) addr);
10599 xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
10602 getpkt (&rs->buf, 0);
10604 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
10607 case PACKET_UNKNOWN:
10612 internal_error (__FILE__, __LINE__,
10613 _("remote_remove_hw_breakpoint: reached end of function"));
10616 /* Verify memory using the "qCRC:" request. */
10619 remote_target::verify_memory (const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
10621 struct remote_state *rs = get_remote_state ();
10622 unsigned long host_crc, target_crc;
10625 /* It doesn't make sense to use qCRC if the remote target is
10626 connected but not running. */
10627 if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE)
10629 enum packet_result result;
10631 /* Make sure the remote is pointing at the right process. */
10632 set_general_process ();
10634 /* FIXME: assumes lma can fit into long. */
10635 xsnprintf (rs->buf.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10636 (long) lma, (long) size);
10639 /* Be clever; compute the host_crc before waiting for target
10641 host_crc = xcrc32 (data, size, 0xffffffff);
10643 getpkt (&rs->buf, 0);
10645 result = packet_ok (rs->buf,
10646 &remote_protocol_packets[PACKET_qCRC]);
10647 if (result == PACKET_ERROR)
10649 else if (result == PACKET_OK)
10651 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
10652 target_crc = target_crc * 16 + fromhex (*tmp);
10654 return (host_crc == target_crc);
10658 return simple_verify_memory (this, data, lma, size);
10661 /* compare-sections command
10663 With no arguments, compares each loadable section in the exec bfd
10664 with the same memory range on the target, and reports mismatches.
10665 Useful for verifying the image on the target against the exec file. */
10668 compare_sections_command (const char *args, int from_tty)
10671 const char *sectname;
10672 bfd_size_type size;
10675 int mismatched = 0;
10680 error (_("command cannot be used without an exec file"));
10682 if (args != NULL && strcmp (args, "-r") == 0)
10688 for (s = exec_bfd->sections; s; s = s->next)
10690 if (!(s->flags & SEC_LOAD))
10691 continue; /* Skip non-loadable section. */
10693 if (read_only && (s->flags & SEC_READONLY) == 0)
10694 continue; /* Skip writeable sections */
10696 size = bfd_get_section_size (s);
10698 continue; /* Skip zero-length section. */
10700 sectname = bfd_get_section_name (exec_bfd, s);
10701 if (args && strcmp (args, sectname) != 0)
10702 continue; /* Not the section selected by user. */
10704 matched = 1; /* Do this section. */
10707 gdb::byte_vector sectdata (size);
10708 bfd_get_section_contents (exec_bfd, s, sectdata.data (), 0, size);
10710 res = target_verify_memory (sectdata.data (), lma, size);
10713 error (_("target memory fault, section %s, range %s -- %s"), sectname,
10714 paddress (target_gdbarch (), lma),
10715 paddress (target_gdbarch (), lma + size));
10717 printf_filtered ("Section %s, range %s -- %s: ", sectname,
10718 paddress (target_gdbarch (), lma),
10719 paddress (target_gdbarch (), lma + size));
10721 printf_filtered ("matched.\n");
10724 printf_filtered ("MIS-MATCHED!\n");
10728 if (mismatched > 0)
10729 warning (_("One or more sections of the target image does not match\n\
10730 the loaded file\n"));
10731 if (args && !matched)
10732 printf_filtered (_("No loaded section named '%s'.\n"), args);
10735 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10736 into remote target. The number of bytes written to the remote
10737 target is returned, or -1 for error. */
10740 remote_target::remote_write_qxfer (const char *object_name,
10741 const char *annex, const gdb_byte *writebuf,
10742 ULONGEST offset, LONGEST len,
10743 ULONGEST *xfered_len,
10744 struct packet_config *packet)
10748 struct remote_state *rs = get_remote_state ();
10749 int max_size = get_memory_write_packet_size ();
10751 if (packet_config_support (packet) == PACKET_DISABLE)
10752 return TARGET_XFER_E_IO;
10754 /* Insert header. */
10755 i = snprintf (rs->buf.data (), max_size,
10756 "qXfer:%s:write:%s:%s:",
10757 object_name, annex ? annex : "",
10758 phex_nz (offset, sizeof offset));
10759 max_size -= (i + 1);
10761 /* Escape as much data as fits into rs->buf. */
10762 buf_len = remote_escape_output
10763 (writebuf, len, 1, (gdb_byte *) rs->buf.data () + i, &max_size, max_size);
10765 if (putpkt_binary (rs->buf.data (), i + buf_len) < 0
10766 || getpkt_sane (&rs->buf, 0) < 0
10767 || packet_ok (rs->buf, packet) != PACKET_OK)
10768 return TARGET_XFER_E_IO;
10770 unpack_varlen_hex (rs->buf.data (), &n);
10773 return (*xfered_len != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
10776 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10777 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10778 number of bytes read is returned, or 0 for EOF, or -1 for error.
10779 The number of bytes read may be less than LEN without indicating an
10780 EOF. PACKET is checked and updated to indicate whether the remote
10781 target supports this object. */
10784 remote_target::remote_read_qxfer (const char *object_name,
10786 gdb_byte *readbuf, ULONGEST offset,
10788 ULONGEST *xfered_len,
10789 struct packet_config *packet)
10791 struct remote_state *rs = get_remote_state ();
10792 LONGEST i, n, packet_len;
10794 if (packet_config_support (packet) == PACKET_DISABLE)
10795 return TARGET_XFER_E_IO;
10797 /* Check whether we've cached an end-of-object packet that matches
10799 if (rs->finished_object)
10801 if (strcmp (object_name, rs->finished_object) == 0
10802 && strcmp (annex ? annex : "", rs->finished_annex) == 0
10803 && offset == rs->finished_offset)
10804 return TARGET_XFER_EOF;
10807 /* Otherwise, we're now reading something different. Discard
10809 xfree (rs->finished_object);
10810 xfree (rs->finished_annex);
10811 rs->finished_object = NULL;
10812 rs->finished_annex = NULL;
10815 /* Request only enough to fit in a single packet. The actual data
10816 may not, since we don't know how much of it will need to be escaped;
10817 the target is free to respond with slightly less data. We subtract
10818 five to account for the response type and the protocol frame. */
10819 n = std::min<LONGEST> (get_remote_packet_size () - 5, len);
10820 snprintf (rs->buf.data (), get_remote_packet_size () - 4,
10821 "qXfer:%s:read:%s:%s,%s",
10822 object_name, annex ? annex : "",
10823 phex_nz (offset, sizeof offset),
10824 phex_nz (n, sizeof n));
10825 i = putpkt (rs->buf);
10827 return TARGET_XFER_E_IO;
10830 packet_len = getpkt_sane (&rs->buf, 0);
10831 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
10832 return TARGET_XFER_E_IO;
10834 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
10835 error (_("Unknown remote qXfer reply: %s"), rs->buf.data ());
10837 /* 'm' means there is (or at least might be) more data after this
10838 batch. That does not make sense unless there's at least one byte
10839 of data in this reply. */
10840 if (rs->buf[0] == 'm' && packet_len == 1)
10841 error (_("Remote qXfer reply contained no data."));
10843 /* Got some data. */
10844 i = remote_unescape_input ((gdb_byte *) rs->buf.data () + 1,
10845 packet_len - 1, readbuf, n);
10847 /* 'l' is an EOF marker, possibly including a final block of data,
10848 or possibly empty. If we have the final block of a non-empty
10849 object, record this fact to bypass a subsequent partial read. */
10850 if (rs->buf[0] == 'l' && offset + i > 0)
10852 rs->finished_object = xstrdup (object_name);
10853 rs->finished_annex = xstrdup (annex ? annex : "");
10854 rs->finished_offset = offset + i;
10858 return TARGET_XFER_EOF;
10862 return TARGET_XFER_OK;
10866 enum target_xfer_status
10867 remote_target::xfer_partial (enum target_object object,
10868 const char *annex, gdb_byte *readbuf,
10869 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
10870 ULONGEST *xfered_len)
10872 struct remote_state *rs;
10876 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
10878 set_remote_traceframe ();
10879 set_general_thread (inferior_ptid);
10881 rs = get_remote_state ();
10883 /* Handle memory using the standard memory routines. */
10884 if (object == TARGET_OBJECT_MEMORY)
10886 /* If the remote target is connected but not running, we should
10887 pass this request down to a lower stratum (e.g. the executable
10889 if (!target_has_execution)
10890 return TARGET_XFER_EOF;
10892 if (writebuf != NULL)
10893 return remote_write_bytes (offset, writebuf, len, unit_size,
10896 return remote_read_bytes (offset, readbuf, len, unit_size,
10900 /* Handle SPU memory using qxfer packets. */
10901 if (object == TARGET_OBJECT_SPU)
10904 return remote_read_qxfer ("spu", annex, readbuf, offset, len,
10905 xfered_len, &remote_protocol_packets
10906 [PACKET_qXfer_spu_read]);
10908 return remote_write_qxfer ("spu", annex, writebuf, offset, len,
10909 xfered_len, &remote_protocol_packets
10910 [PACKET_qXfer_spu_write]);
10913 /* Handle extra signal info using qxfer packets. */
10914 if (object == TARGET_OBJECT_SIGNAL_INFO)
10917 return remote_read_qxfer ("siginfo", annex, readbuf, offset, len,
10918 xfered_len, &remote_protocol_packets
10919 [PACKET_qXfer_siginfo_read]);
10921 return remote_write_qxfer ("siginfo", annex,
10922 writebuf, offset, len, xfered_len,
10923 &remote_protocol_packets
10924 [PACKET_qXfer_siginfo_write]);
10927 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
10930 return remote_read_qxfer ("statictrace", annex,
10931 readbuf, offset, len, xfered_len,
10932 &remote_protocol_packets
10933 [PACKET_qXfer_statictrace_read]);
10935 return TARGET_XFER_E_IO;
10938 /* Only handle flash writes. */
10939 if (writebuf != NULL)
10943 case TARGET_OBJECT_FLASH:
10944 return remote_flash_write (offset, len, xfered_len,
10948 return TARGET_XFER_E_IO;
10952 /* Map pre-existing objects onto letters. DO NOT do this for new
10953 objects!!! Instead specify new query packets. */
10956 case TARGET_OBJECT_AVR:
10960 case TARGET_OBJECT_AUXV:
10961 gdb_assert (annex == NULL);
10962 return remote_read_qxfer ("auxv", annex, readbuf, offset, len,
10964 &remote_protocol_packets[PACKET_qXfer_auxv]);
10966 case TARGET_OBJECT_AVAILABLE_FEATURES:
10967 return remote_read_qxfer
10968 ("features", annex, readbuf, offset, len, xfered_len,
10969 &remote_protocol_packets[PACKET_qXfer_features]);
10971 case TARGET_OBJECT_LIBRARIES:
10972 return remote_read_qxfer
10973 ("libraries", annex, readbuf, offset, len, xfered_len,
10974 &remote_protocol_packets[PACKET_qXfer_libraries]);
10976 case TARGET_OBJECT_LIBRARIES_SVR4:
10977 return remote_read_qxfer
10978 ("libraries-svr4", annex, readbuf, offset, len, xfered_len,
10979 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
10981 case TARGET_OBJECT_MEMORY_MAP:
10982 gdb_assert (annex == NULL);
10983 return remote_read_qxfer ("memory-map", annex, readbuf, offset, len,
10985 &remote_protocol_packets[PACKET_qXfer_memory_map]);
10987 case TARGET_OBJECT_OSDATA:
10988 /* Should only get here if we're connected. */
10989 gdb_assert (rs->remote_desc);
10990 return remote_read_qxfer
10991 ("osdata", annex, readbuf, offset, len, xfered_len,
10992 &remote_protocol_packets[PACKET_qXfer_osdata]);
10994 case TARGET_OBJECT_THREADS:
10995 gdb_assert (annex == NULL);
10996 return remote_read_qxfer ("threads", annex, readbuf, offset, len,
10998 &remote_protocol_packets[PACKET_qXfer_threads]);
11000 case TARGET_OBJECT_TRACEFRAME_INFO:
11001 gdb_assert (annex == NULL);
11002 return remote_read_qxfer
11003 ("traceframe-info", annex, readbuf, offset, len, xfered_len,
11004 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
11006 case TARGET_OBJECT_FDPIC:
11007 return remote_read_qxfer ("fdpic", annex, readbuf, offset, len,
11009 &remote_protocol_packets[PACKET_qXfer_fdpic]);
11011 case TARGET_OBJECT_OPENVMS_UIB:
11012 return remote_read_qxfer ("uib", annex, readbuf, offset, len,
11014 &remote_protocol_packets[PACKET_qXfer_uib]);
11016 case TARGET_OBJECT_BTRACE:
11017 return remote_read_qxfer ("btrace", annex, readbuf, offset, len,
11019 &remote_protocol_packets[PACKET_qXfer_btrace]);
11021 case TARGET_OBJECT_BTRACE_CONF:
11022 return remote_read_qxfer ("btrace-conf", annex, readbuf, offset,
11024 &remote_protocol_packets[PACKET_qXfer_btrace_conf]);
11026 case TARGET_OBJECT_EXEC_FILE:
11027 return remote_read_qxfer ("exec-file", annex, readbuf, offset,
11029 &remote_protocol_packets[PACKET_qXfer_exec_file]);
11032 return TARGET_XFER_E_IO;
11035 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11036 large enough let the caller deal with it. */
11037 if (len < get_remote_packet_size ())
11038 return TARGET_XFER_E_IO;
11039 len = get_remote_packet_size ();
11041 /* Except for querying the minimum buffer size, target must be open. */
11042 if (!rs->remote_desc)
11043 error (_("remote query is only available after target open"));
11045 gdb_assert (annex != NULL);
11046 gdb_assert (readbuf != NULL);
11048 p2 = rs->buf.data ();
11050 *p2++ = query_type;
11052 /* We used one buffer char for the remote protocol q command and
11053 another for the query type. As the remote protocol encapsulation
11054 uses 4 chars plus one extra in case we are debugging
11055 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11058 while (annex[i] && (i < (get_remote_packet_size () - 8)))
11060 /* Bad caller may have sent forbidden characters. */
11061 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
11066 gdb_assert (annex[i] == '\0');
11068 i = putpkt (rs->buf);
11070 return TARGET_XFER_E_IO;
11072 getpkt (&rs->buf, 0);
11073 strcpy ((char *) readbuf, rs->buf.data ());
11075 *xfered_len = strlen ((char *) readbuf);
11076 return (*xfered_len != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
11079 /* Implementation of to_get_memory_xfer_limit. */
11082 remote_target::get_memory_xfer_limit ()
11084 return get_memory_write_packet_size ();
11088 remote_target::search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
11089 const gdb_byte *pattern, ULONGEST pattern_len,
11090 CORE_ADDR *found_addrp)
11092 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
11093 struct remote_state *rs = get_remote_state ();
11094 int max_size = get_memory_write_packet_size ();
11095 struct packet_config *packet =
11096 &remote_protocol_packets[PACKET_qSearch_memory];
11097 /* Number of packet bytes used to encode the pattern;
11098 this could be more than PATTERN_LEN due to escape characters. */
11099 int escaped_pattern_len;
11100 /* Amount of pattern that was encodable in the packet. */
11101 int used_pattern_len;
11104 ULONGEST found_addr;
11106 /* Don't go to the target if we don't have to. This is done before
11107 checking packet_config_support to avoid the possibility that a
11108 success for this edge case means the facility works in
11110 if (pattern_len > search_space_len)
11112 if (pattern_len == 0)
11114 *found_addrp = start_addr;
11118 /* If we already know the packet isn't supported, fall back to the simple
11119 way of searching memory. */
11121 if (packet_config_support (packet) == PACKET_DISABLE)
11123 /* Target doesn't provided special support, fall back and use the
11124 standard support (copy memory and do the search here). */
11125 return simple_search_memory (this, start_addr, search_space_len,
11126 pattern, pattern_len, found_addrp);
11129 /* Make sure the remote is pointing at the right process. */
11130 set_general_process ();
11132 /* Insert header. */
11133 i = snprintf (rs->buf.data (), max_size,
11134 "qSearch:memory:%s;%s;",
11135 phex_nz (start_addr, addr_size),
11136 phex_nz (search_space_len, sizeof (search_space_len)));
11137 max_size -= (i + 1);
11139 /* Escape as much data as fits into rs->buf. */
11140 escaped_pattern_len =
11141 remote_escape_output (pattern, pattern_len, 1,
11142 (gdb_byte *) rs->buf.data () + i,
11143 &used_pattern_len, max_size);
11145 /* Bail if the pattern is too large. */
11146 if (used_pattern_len != pattern_len)
11147 error (_("Pattern is too large to transmit to remote target."));
11149 if (putpkt_binary (rs->buf.data (), i + escaped_pattern_len) < 0
11150 || getpkt_sane (&rs->buf, 0) < 0
11151 || packet_ok (rs->buf, packet) != PACKET_OK)
11153 /* The request may not have worked because the command is not
11154 supported. If so, fall back to the simple way. */
11155 if (packet_config_support (packet) == PACKET_DISABLE)
11157 return simple_search_memory (this, start_addr, search_space_len,
11158 pattern, pattern_len, found_addrp);
11163 if (rs->buf[0] == '0')
11165 else if (rs->buf[0] == '1')
11168 if (rs->buf[1] != ',')
11169 error (_("Unknown qSearch:memory reply: %s"), rs->buf.data ());
11170 unpack_varlen_hex (&rs->buf[2], &found_addr);
11171 *found_addrp = found_addr;
11174 error (_("Unknown qSearch:memory reply: %s"), rs->buf.data ());
11180 remote_target::rcmd (const char *command, struct ui_file *outbuf)
11182 struct remote_state *rs = get_remote_state ();
11183 char *p = rs->buf.data ();
11185 if (!rs->remote_desc)
11186 error (_("remote rcmd is only available after target open"));
11188 /* Send a NULL command across as an empty command. */
11189 if (command == NULL)
11192 /* The query prefix. */
11193 strcpy (rs->buf.data (), "qRcmd,");
11194 p = strchr (rs->buf.data (), '\0');
11196 if ((strlen (rs->buf.data ()) + strlen (command) * 2 + 8/*misc*/)
11197 > get_remote_packet_size ())
11198 error (_("\"monitor\" command ``%s'' is too long."), command);
11200 /* Encode the actual command. */
11201 bin2hex ((const gdb_byte *) command, p, strlen (command));
11203 if (putpkt (rs->buf) < 0)
11204 error (_("Communication problem with target."));
11206 /* get/display the response */
11211 /* XXX - see also remote_get_noisy_reply(). */
11212 QUIT; /* Allow user to bail out with ^C. */
11214 if (getpkt_sane (&rs->buf, 0) == -1)
11216 /* Timeout. Continue to (try to) read responses.
11217 This is better than stopping with an error, assuming the stub
11218 is still executing the (long) monitor command.
11219 If needed, the user can interrupt gdb using C-c, obtaining
11220 an effect similar to stop on timeout. */
11223 buf = rs->buf.data ();
11224 if (buf[0] == '\0')
11225 error (_("Target does not support this command."));
11226 if (buf[0] == 'O' && buf[1] != 'K')
11228 remote_console_output (buf + 1); /* 'O' message from stub. */
11231 if (strcmp (buf, "OK") == 0)
11233 if (strlen (buf) == 3 && buf[0] == 'E'
11234 && isdigit (buf[1]) && isdigit (buf[2]))
11236 error (_("Protocol error with Rcmd"));
11238 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
11240 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
11242 fputc_unfiltered (c, outbuf);
11248 std::vector<mem_region>
11249 remote_target::memory_map ()
11251 std::vector<mem_region> result;
11252 gdb::optional<gdb::char_vector> text
11253 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP, NULL);
11256 result = parse_memory_map (text->data ());
11262 packet_command (const char *args, int from_tty)
11264 remote_target *remote = get_current_remote_target ();
11266 if (remote == nullptr)
11267 error (_("command can only be used with remote target"));
11269 remote->packet_command (args, from_tty);
11273 remote_target::packet_command (const char *args, int from_tty)
11276 error (_("remote-packet command requires packet text as argument"));
11278 puts_filtered ("sending: ");
11279 print_packet (args);
11280 puts_filtered ("\n");
11283 remote_state *rs = get_remote_state ();
11285 getpkt (&rs->buf, 0);
11286 puts_filtered ("received: ");
11287 print_packet (rs->buf.data ());
11288 puts_filtered ("\n");
11292 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11294 static void display_thread_info (struct gdb_ext_thread_info *info);
11296 static void threadset_test_cmd (char *cmd, int tty);
11298 static void threadalive_test (char *cmd, int tty);
11300 static void threadlist_test_cmd (char *cmd, int tty);
11302 int get_and_display_threadinfo (threadref *ref);
11304 static void threadinfo_test_cmd (char *cmd, int tty);
11306 static int thread_display_step (threadref *ref, void *context);
11308 static void threadlist_update_test_cmd (char *cmd, int tty);
11310 static void init_remote_threadtests (void);
11312 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11315 threadset_test_cmd (const char *cmd, int tty)
11317 int sample_thread = SAMPLE_THREAD;
11319 printf_filtered (_("Remote threadset test\n"));
11320 set_general_thread (sample_thread);
11325 threadalive_test (const char *cmd, int tty)
11327 int sample_thread = SAMPLE_THREAD;
11328 int pid = inferior_ptid.pid ();
11329 ptid_t ptid = ptid_t (pid, sample_thread, 0);
11331 if (remote_thread_alive (ptid))
11332 printf_filtered ("PASS: Thread alive test\n");
11334 printf_filtered ("FAIL: Thread alive test\n");
11337 void output_threadid (char *title, threadref *ref);
11340 output_threadid (char *title, threadref *ref)
11344 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
11346 printf_filtered ("%s %s\n", title, (&hexid[0]));
11350 threadlist_test_cmd (const char *cmd, int tty)
11353 threadref nextthread;
11354 int done, result_count;
11355 threadref threadlist[3];
11357 printf_filtered ("Remote Threadlist test\n");
11358 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
11359 &result_count, &threadlist[0]))
11360 printf_filtered ("FAIL: threadlist test\n");
11363 threadref *scan = threadlist;
11364 threadref *limit = scan + result_count;
11366 while (scan < limit)
11367 output_threadid (" thread ", scan++);
11372 display_thread_info (struct gdb_ext_thread_info *info)
11374 output_threadid ("Threadid: ", &info->threadid);
11375 printf_filtered ("Name: %s\n ", info->shortname);
11376 printf_filtered ("State: %s\n", info->display);
11377 printf_filtered ("other: %s\n\n", info->more_display);
11381 get_and_display_threadinfo (threadref *ref)
11385 struct gdb_ext_thread_info threadinfo;
11387 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
11388 | TAG_MOREDISPLAY | TAG_DISPLAY;
11389 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
11390 display_thread_info (&threadinfo);
11395 threadinfo_test_cmd (const char *cmd, int tty)
11397 int athread = SAMPLE_THREAD;
11401 int_to_threadref (&thread, athread);
11402 printf_filtered ("Remote Threadinfo test\n");
11403 if (!get_and_display_threadinfo (&thread))
11404 printf_filtered ("FAIL cannot get thread info\n");
11408 thread_display_step (threadref *ref, void *context)
11410 /* output_threadid(" threadstep ",ref); *//* simple test */
11411 return get_and_display_threadinfo (ref);
11415 threadlist_update_test_cmd (const char *cmd, int tty)
11417 printf_filtered ("Remote Threadlist update test\n");
11418 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
11422 init_remote_threadtests (void)
11424 add_com ("tlist", class_obscure, threadlist_test_cmd,
11425 _("Fetch and print the remote list of "
11426 "thread identifiers, one pkt only"));
11427 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
11428 _("Fetch and display info about one thread"));
11429 add_com ("tset", class_obscure, threadset_test_cmd,
11430 _("Test setting to a different thread"));
11431 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
11432 _("Iterate through updating all remote thread info"));
11433 add_com ("talive", class_obscure, threadalive_test,
11434 _(" Remote thread alive test "));
11439 /* Convert a thread ID to a string. Returns the string in a static
11443 remote_target::pid_to_str (ptid_t ptid)
11445 static char buf[64];
11446 struct remote_state *rs = get_remote_state ();
11448 if (ptid == null_ptid)
11449 return normal_pid_to_str (ptid);
11450 else if (ptid.is_pid ())
11452 /* Printing an inferior target id. */
11454 /* When multi-process extensions are off, there's no way in the
11455 remote protocol to know the remote process id, if there's any
11456 at all. There's one exception --- when we're connected with
11457 target extended-remote, and we manually attached to a process
11458 with "attach PID". We don't record anywhere a flag that
11459 allows us to distinguish that case from the case of
11460 connecting with extended-remote and the stub already being
11461 attached to a process, and reporting yes to qAttached, hence
11462 no smart special casing here. */
11463 if (!remote_multi_process_p (rs))
11465 xsnprintf (buf, sizeof buf, "Remote target");
11469 return normal_pid_to_str (ptid);
11473 if (magic_null_ptid == ptid)
11474 xsnprintf (buf, sizeof buf, "Thread <main>");
11475 else if (remote_multi_process_p (rs))
11476 if (ptid.lwp () == 0)
11477 return normal_pid_to_str (ptid);
11479 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
11480 ptid.pid (), ptid.lwp ());
11482 xsnprintf (buf, sizeof buf, "Thread %ld",
11488 /* Get the address of the thread local variable in OBJFILE which is
11489 stored at OFFSET within the thread local storage for thread PTID. */
11492 remote_target::get_thread_local_address (ptid_t ptid, CORE_ADDR lm,
11495 if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE)
11497 struct remote_state *rs = get_remote_state ();
11498 char *p = rs->buf.data ();
11499 char *endp = p + get_remote_packet_size ();
11500 enum packet_result result;
11502 strcpy (p, "qGetTLSAddr:");
11504 p = write_ptid (p, endp, ptid);
11506 p += hexnumstr (p, offset);
11508 p += hexnumstr (p, lm);
11512 getpkt (&rs->buf, 0);
11513 result = packet_ok (rs->buf,
11514 &remote_protocol_packets[PACKET_qGetTLSAddr]);
11515 if (result == PACKET_OK)
11519 unpack_varlen_hex (rs->buf.data (), &addr);
11522 else if (result == PACKET_UNKNOWN)
11523 throw_error (TLS_GENERIC_ERROR,
11524 _("Remote target doesn't support qGetTLSAddr packet"));
11526 throw_error (TLS_GENERIC_ERROR,
11527 _("Remote target failed to process qGetTLSAddr request"));
11530 throw_error (TLS_GENERIC_ERROR,
11531 _("TLS not supported or disabled on this target"));
11536 /* Provide thread local base, i.e. Thread Information Block address.
11537 Returns 1 if ptid is found and thread_local_base is non zero. */
11540 remote_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr)
11542 if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE)
11544 struct remote_state *rs = get_remote_state ();
11545 char *p = rs->buf.data ();
11546 char *endp = p + get_remote_packet_size ();
11547 enum packet_result result;
11549 strcpy (p, "qGetTIBAddr:");
11551 p = write_ptid (p, endp, ptid);
11555 getpkt (&rs->buf, 0);
11556 result = packet_ok (rs->buf,
11557 &remote_protocol_packets[PACKET_qGetTIBAddr]);
11558 if (result == PACKET_OK)
11561 unpack_varlen_hex (rs->buf.data (), &val);
11563 *addr = (CORE_ADDR) val;
11566 else if (result == PACKET_UNKNOWN)
11567 error (_("Remote target doesn't support qGetTIBAddr packet"));
11569 error (_("Remote target failed to process qGetTIBAddr request"));
11572 error (_("qGetTIBAddr not supported or disabled on this target"));
11577 /* Support for inferring a target description based on the current
11578 architecture and the size of a 'g' packet. While the 'g' packet
11579 can have any size (since optional registers can be left off the
11580 end), some sizes are easily recognizable given knowledge of the
11581 approximate architecture. */
11583 struct remote_g_packet_guess
11585 remote_g_packet_guess (int bytes_, const struct target_desc *tdesc_)
11592 const struct target_desc *tdesc;
11595 struct remote_g_packet_data : public allocate_on_obstack
11597 std::vector<remote_g_packet_guess> guesses;
11600 static struct gdbarch_data *remote_g_packet_data_handle;
11603 remote_g_packet_data_init (struct obstack *obstack)
11605 return new (obstack) remote_g_packet_data;
11609 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
11610 const struct target_desc *tdesc)
11612 struct remote_g_packet_data *data
11613 = ((struct remote_g_packet_data *)
11614 gdbarch_data (gdbarch, remote_g_packet_data_handle));
11616 gdb_assert (tdesc != NULL);
11618 for (const remote_g_packet_guess &guess : data->guesses)
11619 if (guess.bytes == bytes)
11620 internal_error (__FILE__, __LINE__,
11621 _("Duplicate g packet description added for size %d"),
11624 data->guesses.emplace_back (bytes, tdesc);
11627 /* Return true if remote_read_description would do anything on this target
11628 and architecture, false otherwise. */
11631 remote_read_description_p (struct target_ops *target)
11633 struct remote_g_packet_data *data
11634 = ((struct remote_g_packet_data *)
11635 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
11637 return !data->guesses.empty ();
11640 const struct target_desc *
11641 remote_target::read_description ()
11643 struct remote_g_packet_data *data
11644 = ((struct remote_g_packet_data *)
11645 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
11647 /* Do not try this during initial connection, when we do not know
11648 whether there is a running but stopped thread. */
11649 if (!target_has_execution || inferior_ptid == null_ptid)
11650 return beneath ()->read_description ();
11652 if (!data->guesses.empty ())
11654 int bytes = send_g_packet ();
11656 for (const remote_g_packet_guess &guess : data->guesses)
11657 if (guess.bytes == bytes)
11658 return guess.tdesc;
11660 /* We discard the g packet. A minor optimization would be to
11661 hold on to it, and fill the register cache once we have selected
11662 an architecture, but it's too tricky to do safely. */
11665 return beneath ()->read_description ();
11668 /* Remote file transfer support. This is host-initiated I/O, not
11669 target-initiated; for target-initiated, see remote-fileio.c. */
11671 /* If *LEFT is at least the length of STRING, copy STRING to
11672 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11673 decrease *LEFT. Otherwise raise an error. */
11676 remote_buffer_add_string (char **buffer, int *left, const char *string)
11678 int len = strlen (string);
11681 error (_("Packet too long for target."));
11683 memcpy (*buffer, string, len);
11687 /* NUL-terminate the buffer as a convenience, if there is
11693 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11694 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11695 decrease *LEFT. Otherwise raise an error. */
11698 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
11701 if (2 * len > *left)
11702 error (_("Packet too long for target."));
11704 bin2hex (bytes, *buffer, len);
11705 *buffer += 2 * len;
11708 /* NUL-terminate the buffer as a convenience, if there is
11714 /* If *LEFT is large enough, convert VALUE to hex and add it to
11715 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11716 decrease *LEFT. Otherwise raise an error. */
11719 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
11721 int len = hexnumlen (value);
11724 error (_("Packet too long for target."));
11726 hexnumstr (*buffer, value);
11730 /* NUL-terminate the buffer as a convenience, if there is
11736 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11737 value, *REMOTE_ERRNO to the remote error number or zero if none
11738 was included, and *ATTACHMENT to point to the start of the annex
11739 if any. The length of the packet isn't needed here; there may
11740 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11742 Return 0 if the packet could be parsed, -1 if it could not. If
11743 -1 is returned, the other variables may not be initialized. */
11746 remote_hostio_parse_result (char *buffer, int *retcode,
11747 int *remote_errno, char **attachment)
11752 *attachment = NULL;
11754 if (buffer[0] != 'F')
11758 *retcode = strtol (&buffer[1], &p, 16);
11759 if (errno != 0 || p == &buffer[1])
11762 /* Check for ",errno". */
11766 *remote_errno = strtol (p + 1, &p2, 16);
11767 if (errno != 0 || p + 1 == p2)
11772 /* Check for ";attachment". If there is no attachment, the
11773 packet should end here. */
11776 *attachment = p + 1;
11779 else if (*p == '\0')
11785 /* Send a prepared I/O packet to the target and read its response.
11786 The prepared packet is in the global RS->BUF before this function
11787 is called, and the answer is there when we return.
11789 COMMAND_BYTES is the length of the request to send, which may include
11790 binary data. WHICH_PACKET is the packet configuration to check
11791 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11792 is set to the error number and -1 is returned. Otherwise the value
11793 returned by the function is returned.
11795 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11796 attachment is expected; an error will be reported if there's a
11797 mismatch. If one is found, *ATTACHMENT will be set to point into
11798 the packet buffer and *ATTACHMENT_LEN will be set to the
11799 attachment's length. */
11802 remote_target::remote_hostio_send_command (int command_bytes, int which_packet,
11803 int *remote_errno, char **attachment,
11804 int *attachment_len)
11806 struct remote_state *rs = get_remote_state ();
11807 int ret, bytes_read;
11808 char *attachment_tmp;
11810 if (packet_support (which_packet) == PACKET_DISABLE)
11812 *remote_errno = FILEIO_ENOSYS;
11816 putpkt_binary (rs->buf.data (), command_bytes);
11817 bytes_read = getpkt_sane (&rs->buf, 0);
11819 /* If it timed out, something is wrong. Don't try to parse the
11821 if (bytes_read < 0)
11823 *remote_errno = FILEIO_EINVAL;
11827 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
11830 *remote_errno = FILEIO_EINVAL;
11832 case PACKET_UNKNOWN:
11833 *remote_errno = FILEIO_ENOSYS;
11839 if (remote_hostio_parse_result (rs->buf.data (), &ret, remote_errno,
11842 *remote_errno = FILEIO_EINVAL;
11846 /* Make sure we saw an attachment if and only if we expected one. */
11847 if ((attachment_tmp == NULL && attachment != NULL)
11848 || (attachment_tmp != NULL && attachment == NULL))
11850 *remote_errno = FILEIO_EINVAL;
11854 /* If an attachment was found, it must point into the packet buffer;
11855 work out how many bytes there were. */
11856 if (attachment_tmp != NULL)
11858 *attachment = attachment_tmp;
11859 *attachment_len = bytes_read - (*attachment - rs->buf.data ());
11865 /* See declaration.h. */
11868 readahead_cache::invalidate ()
11873 /* See declaration.h. */
11876 readahead_cache::invalidate_fd (int fd)
11878 if (this->fd == fd)
11882 /* Set the filesystem remote_hostio functions that take FILENAME
11883 arguments will use. Return 0 on success, or -1 if an error
11884 occurs (and set *REMOTE_ERRNO). */
11887 remote_target::remote_hostio_set_filesystem (struct inferior *inf,
11890 struct remote_state *rs = get_remote_state ();
11891 int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid;
11892 char *p = rs->buf.data ();
11893 int left = get_remote_packet_size () - 1;
11897 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11900 if (rs->fs_pid != -1 && required_pid == rs->fs_pid)
11903 remote_buffer_add_string (&p, &left, "vFile:setfs:");
11905 xsnprintf (arg, sizeof (arg), "%x", required_pid);
11906 remote_buffer_add_string (&p, &left, arg);
11908 ret = remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_setfs,
11909 remote_errno, NULL, NULL);
11911 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11915 rs->fs_pid = required_pid;
11920 /* Implementation of to_fileio_open. */
11923 remote_target::remote_hostio_open (inferior *inf, const char *filename,
11924 int flags, int mode, int warn_if_slow,
11927 struct remote_state *rs = get_remote_state ();
11928 char *p = rs->buf.data ();
11929 int left = get_remote_packet_size () - 1;
11933 static int warning_issued = 0;
11935 printf_unfiltered (_("Reading %s from remote target...\n"),
11938 if (!warning_issued)
11940 warning (_("File transfers from remote targets can be slow."
11941 " Use \"set sysroot\" to access files locally"
11943 warning_issued = 1;
11947 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11950 remote_buffer_add_string (&p, &left, "vFile:open:");
11952 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11953 strlen (filename));
11954 remote_buffer_add_string (&p, &left, ",");
11956 remote_buffer_add_int (&p, &left, flags);
11957 remote_buffer_add_string (&p, &left, ",");
11959 remote_buffer_add_int (&p, &left, mode);
11961 return remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_open,
11962 remote_errno, NULL, NULL);
11966 remote_target::fileio_open (struct inferior *inf, const char *filename,
11967 int flags, int mode, int warn_if_slow,
11970 return remote_hostio_open (inf, filename, flags, mode, warn_if_slow,
11974 /* Implementation of to_fileio_pwrite. */
11977 remote_target::remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
11978 ULONGEST offset, int *remote_errno)
11980 struct remote_state *rs = get_remote_state ();
11981 char *p = rs->buf.data ();
11982 int left = get_remote_packet_size ();
11985 rs->readahead_cache.invalidate_fd (fd);
11987 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
11989 remote_buffer_add_int (&p, &left, fd);
11990 remote_buffer_add_string (&p, &left, ",");
11992 remote_buffer_add_int (&p, &left, offset);
11993 remote_buffer_add_string (&p, &left, ",");
11995 p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len,
11996 (get_remote_packet_size ()
11997 - (p - rs->buf.data ())));
11999 return remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_pwrite,
12000 remote_errno, NULL, NULL);
12004 remote_target::fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
12005 ULONGEST offset, int *remote_errno)
12007 return remote_hostio_pwrite (fd, write_buf, len, offset, remote_errno);
12010 /* Helper for the implementation of to_fileio_pread. Read the file
12011 from the remote side with vFile:pread. */
12014 remote_target::remote_hostio_pread_vFile (int fd, gdb_byte *read_buf, int len,
12015 ULONGEST offset, int *remote_errno)
12017 struct remote_state *rs = get_remote_state ();
12018 char *p = rs->buf.data ();
12020 int left = get_remote_packet_size ();
12021 int ret, attachment_len;
12024 remote_buffer_add_string (&p, &left, "vFile:pread:");
12026 remote_buffer_add_int (&p, &left, fd);
12027 remote_buffer_add_string (&p, &left, ",");
12029 remote_buffer_add_int (&p, &left, len);
12030 remote_buffer_add_string (&p, &left, ",");
12032 remote_buffer_add_int (&p, &left, offset);
12034 ret = remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_pread,
12035 remote_errno, &attachment,
12041 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
12043 if (read_len != ret)
12044 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
12049 /* See declaration.h. */
12052 readahead_cache::pread (int fd, gdb_byte *read_buf, size_t len,
12056 && this->offset <= offset
12057 && offset < this->offset + this->bufsize)
12059 ULONGEST max = this->offset + this->bufsize;
12061 if (offset + len > max)
12062 len = max - offset;
12064 memcpy (read_buf, this->buf + offset - this->offset, len);
12071 /* Implementation of to_fileio_pread. */
12074 remote_target::remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
12075 ULONGEST offset, int *remote_errno)
12078 struct remote_state *rs = get_remote_state ();
12079 readahead_cache *cache = &rs->readahead_cache;
12081 ret = cache->pread (fd, read_buf, len, offset);
12084 cache->hit_count++;
12087 fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n",
12088 pulongest (cache->hit_count));
12092 cache->miss_count++;
12094 fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n",
12095 pulongest (cache->miss_count));
12098 cache->offset = offset;
12099 cache->bufsize = get_remote_packet_size ();
12100 cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize);
12102 ret = remote_hostio_pread_vFile (cache->fd, cache->buf, cache->bufsize,
12103 cache->offset, remote_errno);
12106 cache->invalidate_fd (fd);
12110 cache->bufsize = ret;
12111 return cache->pread (fd, read_buf, len, offset);
12115 remote_target::fileio_pread (int fd, gdb_byte *read_buf, int len,
12116 ULONGEST offset, int *remote_errno)
12118 return remote_hostio_pread (fd, read_buf, len, offset, remote_errno);
12121 /* Implementation of to_fileio_close. */
12124 remote_target::remote_hostio_close (int fd, int *remote_errno)
12126 struct remote_state *rs = get_remote_state ();
12127 char *p = rs->buf.data ();
12128 int left = get_remote_packet_size () - 1;
12130 rs->readahead_cache.invalidate_fd (fd);
12132 remote_buffer_add_string (&p, &left, "vFile:close:");
12134 remote_buffer_add_int (&p, &left, fd);
12136 return remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_close,
12137 remote_errno, NULL, NULL);
12141 remote_target::fileio_close (int fd, int *remote_errno)
12143 return remote_hostio_close (fd, remote_errno);
12146 /* Implementation of to_fileio_unlink. */
12149 remote_target::remote_hostio_unlink (inferior *inf, const char *filename,
12152 struct remote_state *rs = get_remote_state ();
12153 char *p = rs->buf.data ();
12154 int left = get_remote_packet_size () - 1;
12156 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
12159 remote_buffer_add_string (&p, &left, "vFile:unlink:");
12161 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
12162 strlen (filename));
12164 return remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_unlink,
12165 remote_errno, NULL, NULL);
12169 remote_target::fileio_unlink (struct inferior *inf, const char *filename,
12172 return remote_hostio_unlink (inf, filename, remote_errno);
12175 /* Implementation of to_fileio_readlink. */
12177 gdb::optional<std::string>
12178 remote_target::fileio_readlink (struct inferior *inf, const char *filename,
12181 struct remote_state *rs = get_remote_state ();
12182 char *p = rs->buf.data ();
12184 int left = get_remote_packet_size ();
12185 int len, attachment_len;
12188 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
12191 remote_buffer_add_string (&p, &left, "vFile:readlink:");
12193 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
12194 strlen (filename));
12196 len = remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_readlink,
12197 remote_errno, &attachment,
12203 std::string ret (len, '\0');
12205 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
12206 (gdb_byte *) &ret[0], len);
12207 if (read_len != len)
12208 error (_("Readlink returned %d, but %d bytes."), len, read_len);
12213 /* Implementation of to_fileio_fstat. */
12216 remote_target::fileio_fstat (int fd, struct stat *st, int *remote_errno)
12218 struct remote_state *rs = get_remote_state ();
12219 char *p = rs->buf.data ();
12220 int left = get_remote_packet_size ();
12221 int attachment_len, ret;
12223 struct fio_stat fst;
12226 remote_buffer_add_string (&p, &left, "vFile:fstat:");
12228 remote_buffer_add_int (&p, &left, fd);
12230 ret = remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_fstat,
12231 remote_errno, &attachment,
12235 if (*remote_errno != FILEIO_ENOSYS)
12238 /* Strictly we should return -1, ENOSYS here, but when
12239 "set sysroot remote:" was implemented in August 2008
12240 BFD's need for a stat function was sidestepped with
12241 this hack. This was not remedied until March 2015
12242 so we retain the previous behavior to avoid breaking
12245 Note that the memset is a March 2015 addition; older
12246 GDBs set st_size *and nothing else* so the structure
12247 would have garbage in all other fields. This might
12248 break something but retaining the previous behavior
12249 here would be just too wrong. */
12251 memset (st, 0, sizeof (struct stat));
12252 st->st_size = INT_MAX;
12256 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
12257 (gdb_byte *) &fst, sizeof (fst));
12259 if (read_len != ret)
12260 error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len);
12262 if (read_len != sizeof (fst))
12263 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12264 read_len, (int) sizeof (fst));
12266 remote_fileio_to_host_stat (&fst, st);
12271 /* Implementation of to_filesystem_is_local. */
12274 remote_target::filesystem_is_local ()
12276 /* Valgrind GDB presents itself as a remote target but works
12277 on the local filesystem: it does not implement remote get
12278 and users are not expected to set a sysroot. To handle
12279 this case we treat the remote filesystem as local if the
12280 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12281 does not support vFile:open. */
12282 if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0)
12284 enum packet_support ps = packet_support (PACKET_vFile_open);
12286 if (ps == PACKET_SUPPORT_UNKNOWN)
12288 int fd, remote_errno;
12290 /* Try opening a file to probe support. The supplied
12291 filename is irrelevant, we only care about whether
12292 the stub recognizes the packet or not. */
12293 fd = remote_hostio_open (NULL, "just probing",
12294 FILEIO_O_RDONLY, 0700, 0,
12298 remote_hostio_close (fd, &remote_errno);
12300 ps = packet_support (PACKET_vFile_open);
12303 if (ps == PACKET_DISABLE)
12305 static int warning_issued = 0;
12307 if (!warning_issued)
12309 warning (_("remote target does not support file"
12310 " transfer, attempting to access files"
12311 " from local filesystem."));
12312 warning_issued = 1;
12323 remote_fileio_errno_to_host (int errnum)
12329 case FILEIO_ENOENT:
12337 case FILEIO_EACCES:
12339 case FILEIO_EFAULT:
12343 case FILEIO_EEXIST:
12345 case FILEIO_ENODEV:
12347 case FILEIO_ENOTDIR:
12349 case FILEIO_EISDIR:
12351 case FILEIO_EINVAL:
12353 case FILEIO_ENFILE:
12355 case FILEIO_EMFILE:
12359 case FILEIO_ENOSPC:
12361 case FILEIO_ESPIPE:
12365 case FILEIO_ENOSYS:
12367 case FILEIO_ENAMETOOLONG:
12368 return ENAMETOOLONG;
12374 remote_hostio_error (int errnum)
12376 int host_error = remote_fileio_errno_to_host (errnum);
12378 if (host_error == -1)
12379 error (_("Unknown remote I/O error %d"), errnum);
12381 error (_("Remote I/O error: %s"), safe_strerror (host_error));
12384 /* A RAII wrapper around a remote file descriptor. */
12386 class scoped_remote_fd
12389 scoped_remote_fd (remote_target *remote, int fd)
12390 : m_remote (remote), m_fd (fd)
12394 ~scoped_remote_fd ()
12401 m_remote->remote_hostio_close (m_fd, &remote_errno);
12405 /* Swallow exception before it escapes the dtor. If
12406 something goes wrong, likely the connection is gone,
12407 and there's nothing else that can be done. */
12412 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd);
12414 /* Release ownership of the file descriptor, and return it. */
12415 int release () noexcept
12422 /* Return the owned file descriptor. */
12423 int get () const noexcept
12429 /* The remote target. */
12430 remote_target *m_remote;
12432 /* The owned remote I/O file descriptor. */
12437 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
12439 remote_target *remote = get_current_remote_target ();
12441 if (remote == nullptr)
12442 error (_("command can only be used with remote target"));
12444 remote->remote_file_put (local_file, remote_file, from_tty);
12448 remote_target::remote_file_put (const char *local_file, const char *remote_file,
12451 int retcode, remote_errno, bytes, io_size;
12452 int bytes_in_buffer;
12456 gdb_file_up file = gdb_fopen_cloexec (local_file, "rb");
12458 perror_with_name (local_file);
12460 scoped_remote_fd fd
12461 (this, remote_hostio_open (NULL,
12462 remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
12464 0700, 0, &remote_errno));
12465 if (fd.get () == -1)
12466 remote_hostio_error (remote_errno);
12468 /* Send up to this many bytes at once. They won't all fit in the
12469 remote packet limit, so we'll transfer slightly fewer. */
12470 io_size = get_remote_packet_size ();
12471 gdb::byte_vector buffer (io_size);
12473 bytes_in_buffer = 0;
12476 while (bytes_in_buffer || !saw_eof)
12480 bytes = fread (buffer.data () + bytes_in_buffer, 1,
12481 io_size - bytes_in_buffer,
12485 if (ferror (file.get ()))
12486 error (_("Error reading %s."), local_file);
12489 /* EOF. Unless there is something still in the
12490 buffer from the last iteration, we are done. */
12492 if (bytes_in_buffer == 0)
12500 bytes += bytes_in_buffer;
12501 bytes_in_buffer = 0;
12503 retcode = remote_hostio_pwrite (fd.get (), buffer.data (), bytes,
12504 offset, &remote_errno);
12507 remote_hostio_error (remote_errno);
12508 else if (retcode == 0)
12509 error (_("Remote write of %d bytes returned 0!"), bytes);
12510 else if (retcode < bytes)
12512 /* Short write. Save the rest of the read data for the next
12514 bytes_in_buffer = bytes - retcode;
12515 memmove (buffer.data (), buffer.data () + retcode, bytes_in_buffer);
12521 if (remote_hostio_close (fd.release (), &remote_errno))
12522 remote_hostio_error (remote_errno);
12525 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
12529 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
12531 remote_target *remote = get_current_remote_target ();
12533 if (remote == nullptr)
12534 error (_("command can only be used with remote target"));
12536 remote->remote_file_get (remote_file, local_file, from_tty);
12540 remote_target::remote_file_get (const char *remote_file, const char *local_file,
12543 int remote_errno, bytes, io_size;
12546 scoped_remote_fd fd
12547 (this, remote_hostio_open (NULL,
12548 remote_file, FILEIO_O_RDONLY, 0, 0,
12550 if (fd.get () == -1)
12551 remote_hostio_error (remote_errno);
12553 gdb_file_up file = gdb_fopen_cloexec (local_file, "wb");
12555 perror_with_name (local_file);
12557 /* Send up to this many bytes at once. They won't all fit in the
12558 remote packet limit, so we'll transfer slightly fewer. */
12559 io_size = get_remote_packet_size ();
12560 gdb::byte_vector buffer (io_size);
12565 bytes = remote_hostio_pread (fd.get (), buffer.data (), io_size, offset,
12568 /* Success, but no bytes, means end-of-file. */
12571 remote_hostio_error (remote_errno);
12575 bytes = fwrite (buffer.data (), 1, bytes, file.get ());
12577 perror_with_name (local_file);
12580 if (remote_hostio_close (fd.release (), &remote_errno))
12581 remote_hostio_error (remote_errno);
12584 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
12588 remote_file_delete (const char *remote_file, int from_tty)
12590 remote_target *remote = get_current_remote_target ();
12592 if (remote == nullptr)
12593 error (_("command can only be used with remote target"));
12595 remote->remote_file_delete (remote_file, from_tty);
12599 remote_target::remote_file_delete (const char *remote_file, int from_tty)
12601 int retcode, remote_errno;
12603 retcode = remote_hostio_unlink (NULL, remote_file, &remote_errno);
12605 remote_hostio_error (remote_errno);
12608 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
12612 remote_put_command (const char *args, int from_tty)
12615 error_no_arg (_("file to put"));
12617 gdb_argv argv (args);
12618 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
12619 error (_("Invalid parameters to remote put"));
12621 remote_file_put (argv[0], argv[1], from_tty);
12625 remote_get_command (const char *args, int from_tty)
12628 error_no_arg (_("file to get"));
12630 gdb_argv argv (args);
12631 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
12632 error (_("Invalid parameters to remote get"));
12634 remote_file_get (argv[0], argv[1], from_tty);
12638 remote_delete_command (const char *args, int from_tty)
12641 error_no_arg (_("file to delete"));
12643 gdb_argv argv (args);
12644 if (argv[0] == NULL || argv[1] != NULL)
12645 error (_("Invalid parameters to remote delete"));
12647 remote_file_delete (argv[0], from_tty);
12651 remote_command (const char *args, int from_tty)
12653 help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout);
12657 remote_target::can_execute_reverse ()
12659 if (packet_support (PACKET_bs) == PACKET_ENABLE
12660 || packet_support (PACKET_bc) == PACKET_ENABLE)
12667 remote_target::supports_non_stop ()
12673 remote_target::supports_disable_randomization ()
12675 /* Only supported in extended mode. */
12680 remote_target::supports_multi_process ()
12682 struct remote_state *rs = get_remote_state ();
12684 return remote_multi_process_p (rs);
12688 remote_supports_cond_tracepoints ()
12690 return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE;
12694 remote_target::supports_evaluation_of_breakpoint_conditions ()
12696 return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE;
12700 remote_supports_fast_tracepoints ()
12702 return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE;
12706 remote_supports_static_tracepoints ()
12708 return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE;
12712 remote_supports_install_in_trace ()
12714 return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE;
12718 remote_target::supports_enable_disable_tracepoint ()
12720 return (packet_support (PACKET_EnableDisableTracepoints_feature)
12725 remote_target::supports_string_tracing ()
12727 return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE;
12731 remote_target::can_run_breakpoint_commands ()
12733 return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE;
12737 remote_target::trace_init ()
12739 struct remote_state *rs = get_remote_state ();
12742 remote_get_noisy_reply ();
12743 if (strcmp (rs->buf.data (), "OK") != 0)
12744 error (_("Target does not support this command."));
12747 /* Recursive routine to walk through command list including loops, and
12748 download packets for each command. */
12751 remote_target::remote_download_command_source (int num, ULONGEST addr,
12752 struct command_line *cmds)
12754 struct remote_state *rs = get_remote_state ();
12755 struct command_line *cmd;
12757 for (cmd = cmds; cmd; cmd = cmd->next)
12759 QUIT; /* Allow user to bail out with ^C. */
12760 strcpy (rs->buf.data (), "QTDPsrc:");
12761 encode_source_string (num, addr, "cmd", cmd->line,
12762 rs->buf.data () + strlen (rs->buf.data ()),
12763 rs->buf.size () - strlen (rs->buf.data ()));
12765 remote_get_noisy_reply ();
12766 if (strcmp (rs->buf.data (), "OK"))
12767 warning (_("Target does not support source download."));
12769 if (cmd->control_type == while_control
12770 || cmd->control_type == while_stepping_control)
12772 remote_download_command_source (num, addr, cmd->body_list_0.get ());
12774 QUIT; /* Allow user to bail out with ^C. */
12775 strcpy (rs->buf.data (), "QTDPsrc:");
12776 encode_source_string (num, addr, "cmd", "end",
12777 rs->buf.data () + strlen (rs->buf.data ()),
12778 rs->buf.size () - strlen (rs->buf.data ()));
12780 remote_get_noisy_reply ();
12781 if (strcmp (rs->buf.data (), "OK"))
12782 warning (_("Target does not support source download."));
12788 remote_target::download_tracepoint (struct bp_location *loc)
12792 std::vector<std::string> tdp_actions;
12793 std::vector<std::string> stepping_actions;
12795 struct breakpoint *b = loc->owner;
12796 struct tracepoint *t = (struct tracepoint *) b;
12797 struct remote_state *rs = get_remote_state ();
12799 const char *err_msg = _("Tracepoint packet too large for target.");
12802 /* We use a buffer other than rs->buf because we'll build strings
12803 across multiple statements, and other statements in between could
12805 gdb::char_vector buf (get_remote_packet_size ());
12807 encode_actions_rsp (loc, &tdp_actions, &stepping_actions);
12809 tpaddr = loc->address;
12810 sprintf_vma (addrbuf, tpaddr);
12811 ret = snprintf (buf.data (), buf.size (), "QTDP:%x:%s:%c:%lx:%x",
12812 b->number, addrbuf, /* address */
12813 (b->enable_state == bp_enabled ? 'E' : 'D'),
12814 t->step_count, t->pass_count);
12816 if (ret < 0 || ret >= buf.size ())
12817 error ("%s", err_msg);
12819 /* Fast tracepoints are mostly handled by the target, but we can
12820 tell the target how big of an instruction block should be moved
12822 if (b->type == bp_fast_tracepoint)
12824 /* Only test for support at download time; we may not know
12825 target capabilities at definition time. */
12826 if (remote_supports_fast_tracepoints ())
12828 if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr,
12831 size_left = buf.size () - strlen (buf.data ());
12832 ret = snprintf (buf.data () + strlen (buf.data ()),
12834 gdb_insn_length (loc->gdbarch, tpaddr));
12836 if (ret < 0 || ret >= size_left)
12837 error ("%s", err_msg);
12840 /* If it passed validation at definition but fails now,
12841 something is very wrong. */
12842 internal_error (__FILE__, __LINE__,
12843 _("Fast tracepoint not "
12844 "valid during download"));
12847 /* Fast tracepoints are functionally identical to regular
12848 tracepoints, so don't take lack of support as a reason to
12849 give up on the trace run. */
12850 warning (_("Target does not support fast tracepoints, "
12851 "downloading %d as regular tracepoint"), b->number);
12853 else if (b->type == bp_static_tracepoint)
12855 /* Only test for support at download time; we may not know
12856 target capabilities at definition time. */
12857 if (remote_supports_static_tracepoints ())
12859 struct static_tracepoint_marker marker;
12861 if (target_static_tracepoint_marker_at (tpaddr, &marker))
12863 size_left = buf.size () - strlen (buf.data ());
12864 ret = snprintf (buf.data () + strlen (buf.data ()),
12867 if (ret < 0 || ret >= size_left)
12868 error ("%s", err_msg);
12871 error (_("Static tracepoint not valid during download"));
12874 /* Fast tracepoints are functionally identical to regular
12875 tracepoints, so don't take lack of support as a reason
12876 to give up on the trace run. */
12877 error (_("Target does not support static tracepoints"));
12879 /* If the tracepoint has a conditional, make it into an agent
12880 expression and append to the definition. */
12883 /* Only test support at download time, we may not know target
12884 capabilities at definition time. */
12885 if (remote_supports_cond_tracepoints ())
12887 agent_expr_up aexpr = gen_eval_for_expr (tpaddr,
12890 size_left = buf.size () - strlen (buf.data ());
12892 ret = snprintf (buf.data () + strlen (buf.data ()),
12893 size_left, ":X%x,", aexpr->len);
12895 if (ret < 0 || ret >= size_left)
12896 error ("%s", err_msg);
12898 size_left = buf.size () - strlen (buf.data ());
12900 /* Two bytes to encode each aexpr byte, plus the terminating
12902 if (aexpr->len * 2 + 1 > size_left)
12903 error ("%s", err_msg);
12905 pkt = buf.data () + strlen (buf.data ());
12907 for (int ndx = 0; ndx < aexpr->len; ++ndx)
12908 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
12912 warning (_("Target does not support conditional tracepoints, "
12913 "ignoring tp %d cond"), b->number);
12916 if (b->commands || *default_collect)
12918 size_left = buf.size () - strlen (buf.data ());
12920 ret = snprintf (buf.data () + strlen (buf.data ()),
12923 if (ret < 0 || ret >= size_left)
12924 error ("%s", err_msg);
12927 putpkt (buf.data ());
12928 remote_get_noisy_reply ();
12929 if (strcmp (rs->buf.data (), "OK"))
12930 error (_("Target does not support tracepoints."));
12932 /* do_single_steps (t); */
12933 for (auto action_it = tdp_actions.begin ();
12934 action_it != tdp_actions.end (); action_it++)
12936 QUIT; /* Allow user to bail out with ^C. */
12938 bool has_more = ((action_it + 1) != tdp_actions.end ()
12939 || !stepping_actions.empty ());
12941 ret = snprintf (buf.data (), buf.size (), "QTDP:-%x:%s:%s%c",
12942 b->number, addrbuf, /* address */
12943 action_it->c_str (),
12944 has_more ? '-' : 0);
12946 if (ret < 0 || ret >= buf.size ())
12947 error ("%s", err_msg);
12949 putpkt (buf.data ());
12950 remote_get_noisy_reply ();
12951 if (strcmp (rs->buf.data (), "OK"))
12952 error (_("Error on target while setting tracepoints."));
12955 for (auto action_it = stepping_actions.begin ();
12956 action_it != stepping_actions.end (); action_it++)
12958 QUIT; /* Allow user to bail out with ^C. */
12960 bool is_first = action_it == stepping_actions.begin ();
12961 bool has_more = (action_it + 1) != stepping_actions.end ();
12963 ret = snprintf (buf.data (), buf.size (), "QTDP:-%x:%s:%s%s%s",
12964 b->number, addrbuf, /* address */
12965 is_first ? "S" : "",
12966 action_it->c_str (),
12967 has_more ? "-" : "");
12969 if (ret < 0 || ret >= buf.size ())
12970 error ("%s", err_msg);
12972 putpkt (buf.data ());
12973 remote_get_noisy_reply ();
12974 if (strcmp (rs->buf.data (), "OK"))
12975 error (_("Error on target while setting tracepoints."));
12978 if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE)
12980 if (b->location != NULL)
12982 ret = snprintf (buf.data (), buf.size (), "QTDPsrc:");
12984 if (ret < 0 || ret >= buf.size ())
12985 error ("%s", err_msg);
12987 encode_source_string (b->number, loc->address, "at",
12988 event_location_to_string (b->location.get ()),
12989 buf.data () + strlen (buf.data ()),
12990 buf.size () - strlen (buf.data ()));
12991 putpkt (buf.data ());
12992 remote_get_noisy_reply ();
12993 if (strcmp (rs->buf.data (), "OK"))
12994 warning (_("Target does not support source download."));
12996 if (b->cond_string)
12998 ret = snprintf (buf.data (), buf.size (), "QTDPsrc:");
13000 if (ret < 0 || ret >= buf.size ())
13001 error ("%s", err_msg);
13003 encode_source_string (b->number, loc->address,
13004 "cond", b->cond_string,
13005 buf.data () + strlen (buf.data ()),
13006 buf.size () - strlen (buf.data ()));
13007 putpkt (buf.data ());
13008 remote_get_noisy_reply ();
13009 if (strcmp (rs->buf.data (), "OK"))
13010 warning (_("Target does not support source download."));
13012 remote_download_command_source (b->number, loc->address,
13013 breakpoint_commands (b));
13018 remote_target::can_download_tracepoint ()
13020 struct remote_state *rs = get_remote_state ();
13021 struct trace_status *ts;
13024 /* Don't try to install tracepoints until we've relocated our
13025 symbols, and fetched and merged the target's tracepoint list with
13027 if (rs->starting_up)
13030 ts = current_trace_status ();
13031 status = get_trace_status (ts);
13033 if (status == -1 || !ts->running_known || !ts->running)
13036 /* If we are in a tracing experiment, but remote stub doesn't support
13037 installing tracepoint in trace, we have to return. */
13038 if (!remote_supports_install_in_trace ())
13046 remote_target::download_trace_state_variable (const trace_state_variable &tsv)
13048 struct remote_state *rs = get_remote_state ();
13051 xsnprintf (rs->buf.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13052 tsv.number, phex ((ULONGEST) tsv.initial_value, 8),
13054 p = rs->buf.data () + strlen (rs->buf.data ());
13055 if ((p - rs->buf.data ()) + tsv.name.length () * 2
13056 >= get_remote_packet_size ())
13057 error (_("Trace state variable name too long for tsv definition packet"));
13058 p += 2 * bin2hex ((gdb_byte *) (tsv.name.data ()), p, tsv.name.length ());
13061 remote_get_noisy_reply ();
13062 if (rs->buf[0] == '\0')
13063 error (_("Target does not support this command."));
13064 if (strcmp (rs->buf.data (), "OK") != 0)
13065 error (_("Error on target while downloading trace state variable."));
13069 remote_target::enable_tracepoint (struct bp_location *location)
13071 struct remote_state *rs = get_remote_state ();
13074 sprintf_vma (addr_buf, location->address);
13075 xsnprintf (rs->buf.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13076 location->owner->number, addr_buf);
13078 remote_get_noisy_reply ();
13079 if (rs->buf[0] == '\0')
13080 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13081 if (strcmp (rs->buf.data (), "OK") != 0)
13082 error (_("Error on target while enabling tracepoint."));
13086 remote_target::disable_tracepoint (struct bp_location *location)
13088 struct remote_state *rs = get_remote_state ();
13091 sprintf_vma (addr_buf, location->address);
13092 xsnprintf (rs->buf.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13093 location->owner->number, addr_buf);
13095 remote_get_noisy_reply ();
13096 if (rs->buf[0] == '\0')
13097 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13098 if (strcmp (rs->buf.data (), "OK") != 0)
13099 error (_("Error on target while disabling tracepoint."));
13103 remote_target::trace_set_readonly_regions ()
13107 bfd_size_type size;
13113 return; /* No information to give. */
13115 struct remote_state *rs = get_remote_state ();
13117 strcpy (rs->buf.data (), "QTro");
13118 offset = strlen (rs->buf.data ());
13119 for (s = exec_bfd->sections; s; s = s->next)
13121 char tmp1[40], tmp2[40];
13124 if ((s->flags & SEC_LOAD) == 0 ||
13125 /* (s->flags & SEC_CODE) == 0 || */
13126 (s->flags & SEC_READONLY) == 0)
13130 vma = bfd_get_section_vma (abfd, s);
13131 size = bfd_get_section_size (s);
13132 sprintf_vma (tmp1, vma);
13133 sprintf_vma (tmp2, vma + size);
13134 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
13135 if (offset + sec_length + 1 > rs->buf.size ())
13137 if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE)
13139 Too many sections for read-only sections definition packet."));
13142 xsnprintf (rs->buf.data () + offset, rs->buf.size () - offset, ":%s,%s",
13144 offset += sec_length;
13149 getpkt (&rs->buf, 0);
13154 remote_target::trace_start ()
13156 struct remote_state *rs = get_remote_state ();
13158 putpkt ("QTStart");
13159 remote_get_noisy_reply ();
13160 if (rs->buf[0] == '\0')
13161 error (_("Target does not support this command."));
13162 if (strcmp (rs->buf.data (), "OK") != 0)
13163 error (_("Bogus reply from target: %s"), rs->buf.data ());
13167 remote_target::get_trace_status (struct trace_status *ts)
13169 /* Initialize it just to avoid a GCC false warning. */
13171 /* FIXME we need to get register block size some other way. */
13172 extern int trace_regblock_size;
13173 enum packet_result result;
13174 struct remote_state *rs = get_remote_state ();
13176 if (packet_support (PACKET_qTStatus) == PACKET_DISABLE)
13179 trace_regblock_size
13180 = rs->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet;
13182 putpkt ("qTStatus");
13186 p = remote_get_noisy_reply ();
13188 CATCH (ex, RETURN_MASK_ERROR)
13190 if (ex.error != TARGET_CLOSE_ERROR)
13192 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
13195 throw_exception (ex);
13199 result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]);
13201 /* If the remote target doesn't do tracing, flag it. */
13202 if (result == PACKET_UNKNOWN)
13205 /* We're working with a live target. */
13206 ts->filename = NULL;
13209 error (_("Bogus trace status reply from target: %s"), rs->buf.data ());
13211 /* Function 'parse_trace_status' sets default value of each field of
13212 'ts' at first, so we don't have to do it here. */
13213 parse_trace_status (p, ts);
13215 return ts->running;
13219 remote_target::get_tracepoint_status (struct breakpoint *bp,
13220 struct uploaded_tp *utp)
13222 struct remote_state *rs = get_remote_state ();
13224 struct bp_location *loc;
13225 struct tracepoint *tp = (struct tracepoint *) bp;
13226 size_t size = get_remote_packet_size ();
13231 tp->traceframe_usage = 0;
13232 for (loc = tp->loc; loc; loc = loc->next)
13234 /* If the tracepoint was never downloaded, don't go asking for
13236 if (tp->number_on_target == 0)
13238 xsnprintf (rs->buf.data (), size, "qTP:%x:%s", tp->number_on_target,
13239 phex_nz (loc->address, 0));
13241 reply = remote_get_noisy_reply ();
13242 if (reply && *reply)
13245 parse_tracepoint_status (reply + 1, bp, utp);
13251 utp->hit_count = 0;
13252 utp->traceframe_usage = 0;
13253 xsnprintf (rs->buf.data (), size, "qTP:%x:%s", utp->number,
13254 phex_nz (utp->addr, 0));
13256 reply = remote_get_noisy_reply ();
13257 if (reply && *reply)
13260 parse_tracepoint_status (reply + 1, bp, utp);
13266 remote_target::trace_stop ()
13268 struct remote_state *rs = get_remote_state ();
13271 remote_get_noisy_reply ();
13272 if (rs->buf[0] == '\0')
13273 error (_("Target does not support this command."));
13274 if (strcmp (rs->buf.data (), "OK") != 0)
13275 error (_("Bogus reply from target: %s"), rs->buf.data ());
13279 remote_target::trace_find (enum trace_find_type type, int num,
13280 CORE_ADDR addr1, CORE_ADDR addr2,
13283 struct remote_state *rs = get_remote_state ();
13284 char *endbuf = rs->buf.data () + get_remote_packet_size ();
13286 int target_frameno = -1, target_tracept = -1;
13288 /* Lookups other than by absolute frame number depend on the current
13289 trace selected, so make sure it is correct on the remote end
13291 if (type != tfind_number)
13292 set_remote_traceframe ();
13294 p = rs->buf.data ();
13295 strcpy (p, "QTFrame:");
13296 p = strchr (p, '\0');
13300 xsnprintf (p, endbuf - p, "%x", num);
13303 xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0));
13306 xsnprintf (p, endbuf - p, "tdp:%x", num);
13309 xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0),
13310 phex_nz (addr2, 0));
13312 case tfind_outside:
13313 xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0),
13314 phex_nz (addr2, 0));
13317 error (_("Unknown trace find type %d"), type);
13321 reply = remote_get_noisy_reply ();
13322 if (*reply == '\0')
13323 error (_("Target does not support this command."));
13325 while (reply && *reply)
13330 target_frameno = (int) strtol (p, &reply, 16);
13332 error (_("Unable to parse trace frame number"));
13333 /* Don't update our remote traceframe number cache on failure
13334 to select a remote traceframe. */
13335 if (target_frameno == -1)
13340 target_tracept = (int) strtol (p, &reply, 16);
13342 error (_("Unable to parse tracepoint number"));
13344 case 'O': /* "OK"? */
13345 if (reply[1] == 'K' && reply[2] == '\0')
13348 error (_("Bogus reply from target: %s"), reply);
13351 error (_("Bogus reply from target: %s"), reply);
13354 *tpp = target_tracept;
13356 rs->remote_traceframe_number = target_frameno;
13357 return target_frameno;
13361 remote_target::get_trace_state_variable_value (int tsvnum, LONGEST *val)
13363 struct remote_state *rs = get_remote_state ();
13367 set_remote_traceframe ();
13369 xsnprintf (rs->buf.data (), get_remote_packet_size (), "qTV:%x", tsvnum);
13371 reply = remote_get_noisy_reply ();
13372 if (reply && *reply)
13376 unpack_varlen_hex (reply + 1, &uval);
13377 *val = (LONGEST) uval;
13385 remote_target::save_trace_data (const char *filename)
13387 struct remote_state *rs = get_remote_state ();
13390 p = rs->buf.data ();
13391 strcpy (p, "QTSave:");
13393 if ((p - rs->buf.data ()) + strlen (filename) * 2
13394 >= get_remote_packet_size ())
13395 error (_("Remote file name too long for trace save packet"));
13396 p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename));
13399 reply = remote_get_noisy_reply ();
13400 if (*reply == '\0')
13401 error (_("Target does not support this command."));
13402 if (strcmp (reply, "OK") != 0)
13403 error (_("Bogus reply from target: %s"), reply);
13407 /* This is basically a memory transfer, but needs to be its own packet
13408 because we don't know how the target actually organizes its trace
13409 memory, plus we want to be able to ask for as much as possible, but
13410 not be unhappy if we don't get as much as we ask for. */
13413 remote_target::get_raw_trace_data (gdb_byte *buf, ULONGEST offset, LONGEST len)
13415 struct remote_state *rs = get_remote_state ();
13420 p = rs->buf.data ();
13421 strcpy (p, "qTBuffer:");
13423 p += hexnumstr (p, offset);
13425 p += hexnumstr (p, len);
13429 reply = remote_get_noisy_reply ();
13430 if (reply && *reply)
13432 /* 'l' by itself means we're at the end of the buffer and
13433 there is nothing more to get. */
13437 /* Convert the reply into binary. Limit the number of bytes to
13438 convert according to our passed-in buffer size, rather than
13439 what was returned in the packet; if the target is
13440 unexpectedly generous and gives us a bigger reply than we
13441 asked for, we don't want to crash. */
13442 rslt = hex2bin (reply, buf, len);
13446 /* Something went wrong, flag as an error. */
13451 remote_target::set_disconnected_tracing (int val)
13453 struct remote_state *rs = get_remote_state ();
13455 if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE)
13459 xsnprintf (rs->buf.data (), get_remote_packet_size (),
13460 "QTDisconnected:%x", val);
13462 reply = remote_get_noisy_reply ();
13463 if (*reply == '\0')
13464 error (_("Target does not support this command."));
13465 if (strcmp (reply, "OK") != 0)
13466 error (_("Bogus reply from target: %s"), reply);
13469 warning (_("Target does not support disconnected tracing."));
13473 remote_target::core_of_thread (ptid_t ptid)
13475 struct thread_info *info = find_thread_ptid (ptid);
13477 if (info != NULL && info->priv != NULL)
13478 return get_remote_thread_info (info)->core;
13484 remote_target::set_circular_trace_buffer (int val)
13486 struct remote_state *rs = get_remote_state ();
13489 xsnprintf (rs->buf.data (), get_remote_packet_size (),
13490 "QTBuffer:circular:%x", val);
13492 reply = remote_get_noisy_reply ();
13493 if (*reply == '\0')
13494 error (_("Target does not support this command."));
13495 if (strcmp (reply, "OK") != 0)
13496 error (_("Bogus reply from target: %s"), reply);
13500 remote_target::traceframe_info ()
13502 gdb::optional<gdb::char_vector> text
13503 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO,
13506 return parse_traceframe_info (text->data ());
13511 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13512 instruction on which a fast tracepoint may be placed. Returns -1
13513 if the packet is not supported, and 0 if the minimum instruction
13514 length is unknown. */
13517 remote_target::get_min_fast_tracepoint_insn_len ()
13519 struct remote_state *rs = get_remote_state ();
13522 /* If we're not debugging a process yet, the IPA can't be
13524 if (!target_has_execution)
13527 /* Make sure the remote is pointing at the right process. */
13528 set_general_process ();
13530 xsnprintf (rs->buf.data (), get_remote_packet_size (), "qTMinFTPILen");
13532 reply = remote_get_noisy_reply ();
13533 if (*reply == '\0')
13537 ULONGEST min_insn_len;
13539 unpack_varlen_hex (reply, &min_insn_len);
13541 return (int) min_insn_len;
13546 remote_target::set_trace_buffer_size (LONGEST val)
13548 if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE)
13550 struct remote_state *rs = get_remote_state ();
13551 char *buf = rs->buf.data ();
13552 char *endbuf = buf + get_remote_packet_size ();
13553 enum packet_result result;
13555 gdb_assert (val >= 0 || val == -1);
13556 buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
13557 /* Send -1 as literal "-1" to avoid host size dependency. */
13561 buf += hexnumstr (buf, (ULONGEST) -val);
13564 buf += hexnumstr (buf, (ULONGEST) val);
13567 remote_get_noisy_reply ();
13568 result = packet_ok (rs->buf,
13569 &remote_protocol_packets[PACKET_QTBuffer_size]);
13571 if (result != PACKET_OK)
13572 warning (_("Bogus reply from target: %s"), rs->buf.data ());
13577 remote_target::set_trace_notes (const char *user, const char *notes,
13578 const char *stop_notes)
13580 struct remote_state *rs = get_remote_state ();
13582 char *buf = rs->buf.data ();
13583 char *endbuf = buf + get_remote_packet_size ();
13586 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
13589 buf += xsnprintf (buf, endbuf - buf, "user:");
13590 nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user));
13596 buf += xsnprintf (buf, endbuf - buf, "notes:");
13597 nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes));
13603 buf += xsnprintf (buf, endbuf - buf, "tstop:");
13604 nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes));
13608 /* Ensure the buffer is terminated. */
13612 reply = remote_get_noisy_reply ();
13613 if (*reply == '\0')
13616 if (strcmp (reply, "OK") != 0)
13617 error (_("Bogus reply from target: %s"), reply);
13623 remote_target::use_agent (bool use)
13625 if (packet_support (PACKET_QAgent) != PACKET_DISABLE)
13627 struct remote_state *rs = get_remote_state ();
13629 /* If the stub supports QAgent. */
13630 xsnprintf (rs->buf.data (), get_remote_packet_size (), "QAgent:%d", use);
13632 getpkt (&rs->buf, 0);
13634 if (strcmp (rs->buf.data (), "OK") == 0)
13645 remote_target::can_use_agent ()
13647 return (packet_support (PACKET_QAgent) != PACKET_DISABLE);
13650 struct btrace_target_info
13652 /* The ptid of the traced thread. */
13655 /* The obtained branch trace configuration. */
13656 struct btrace_config conf;
13659 /* Reset our idea of our target's btrace configuration. */
13662 remote_btrace_reset (remote_state *rs)
13664 memset (&rs->btrace_config, 0, sizeof (rs->btrace_config));
13667 /* Synchronize the configuration with the target. */
13670 remote_target::btrace_sync_conf (const btrace_config *conf)
13672 struct packet_config *packet;
13673 struct remote_state *rs;
13674 char *buf, *pos, *endbuf;
13676 rs = get_remote_state ();
13677 buf = rs->buf.data ();
13678 endbuf = buf + get_remote_packet_size ();
13680 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size];
13681 if (packet_config_support (packet) == PACKET_ENABLE
13682 && conf->bts.size != rs->btrace_config.bts.size)
13685 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
13689 getpkt (&rs->buf, 0);
13691 if (packet_ok (buf, packet) == PACKET_ERROR)
13693 if (buf[0] == 'E' && buf[1] == '.')
13694 error (_("Failed to configure the BTS buffer size: %s"), buf + 2);
13696 error (_("Failed to configure the BTS buffer size."));
13699 rs->btrace_config.bts.size = conf->bts.size;
13702 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size];
13703 if (packet_config_support (packet) == PACKET_ENABLE
13704 && conf->pt.size != rs->btrace_config.pt.size)
13707 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
13711 getpkt (&rs->buf, 0);
13713 if (packet_ok (buf, packet) == PACKET_ERROR)
13715 if (buf[0] == 'E' && buf[1] == '.')
13716 error (_("Failed to configure the trace buffer size: %s"), buf + 2);
13718 error (_("Failed to configure the trace buffer size."));
13721 rs->btrace_config.pt.size = conf->pt.size;
13725 /* Read the current thread's btrace configuration from the target and
13726 store it into CONF. */
13729 btrace_read_config (struct btrace_config *conf)
13731 gdb::optional<gdb::char_vector> xml
13732 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF, "");
13734 parse_xml_btrace_conf (conf, xml->data ());
13737 /* Maybe reopen target btrace. */
13740 remote_target::remote_btrace_maybe_reopen ()
13742 struct remote_state *rs = get_remote_state ();
13743 int btrace_target_pushed = 0;
13744 #if !defined (HAVE_LIBIPT)
13748 scoped_restore_current_thread restore_thread;
13750 for (thread_info *tp : all_non_exited_threads ())
13752 set_general_thread (tp->ptid);
13754 memset (&rs->btrace_config, 0x00, sizeof (struct btrace_config));
13755 btrace_read_config (&rs->btrace_config);
13757 if (rs->btrace_config.format == BTRACE_FORMAT_NONE)
13760 #if !defined (HAVE_LIBIPT)
13761 if (rs->btrace_config.format == BTRACE_FORMAT_PT)
13766 warning (_("Target is recording using Intel Processor Trace "
13767 "but support was disabled at compile time."));
13772 #endif /* !defined (HAVE_LIBIPT) */
13774 /* Push target, once, but before anything else happens. This way our
13775 changes to the threads will be cleaned up by unpushing the target
13776 in case btrace_read_config () throws. */
13777 if (!btrace_target_pushed)
13779 btrace_target_pushed = 1;
13780 record_btrace_push_target ();
13781 printf_filtered (_("Target is recording using %s.\n"),
13782 btrace_format_string (rs->btrace_config.format));
13785 tp->btrace.target = XCNEW (struct btrace_target_info);
13786 tp->btrace.target->ptid = tp->ptid;
13787 tp->btrace.target->conf = rs->btrace_config;
13791 /* Enable branch tracing. */
13793 struct btrace_target_info *
13794 remote_target::enable_btrace (ptid_t ptid, const struct btrace_config *conf)
13796 struct btrace_target_info *tinfo = NULL;
13797 struct packet_config *packet = NULL;
13798 struct remote_state *rs = get_remote_state ();
13799 char *buf = rs->buf.data ();
13800 char *endbuf = buf + get_remote_packet_size ();
13802 switch (conf->format)
13804 case BTRACE_FORMAT_BTS:
13805 packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
13808 case BTRACE_FORMAT_PT:
13809 packet = &remote_protocol_packets[PACKET_Qbtrace_pt];
13813 if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE)
13814 error (_("Target does not support branch tracing."));
13816 btrace_sync_conf (conf);
13818 set_general_thread (ptid);
13820 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
13822 getpkt (&rs->buf, 0);
13824 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
13826 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
13827 error (_("Could not enable branch tracing for %s: %s"),
13828 target_pid_to_str (ptid), &rs->buf[2]);
13830 error (_("Could not enable branch tracing for %s."),
13831 target_pid_to_str (ptid));
13834 tinfo = XCNEW (struct btrace_target_info);
13835 tinfo->ptid = ptid;
13837 /* If we fail to read the configuration, we lose some information, but the
13838 tracing itself is not impacted. */
13841 btrace_read_config (&tinfo->conf);
13843 CATCH (err, RETURN_MASK_ERROR)
13845 if (err.message != NULL)
13846 warning ("%s", err.message);
13853 /* Disable branch tracing. */
13856 remote_target::disable_btrace (struct btrace_target_info *tinfo)
13858 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off];
13859 struct remote_state *rs = get_remote_state ();
13860 char *buf = rs->buf.data ();
13861 char *endbuf = buf + get_remote_packet_size ();
13863 if (packet_config_support (packet) != PACKET_ENABLE)
13864 error (_("Target does not support branch tracing."));
13866 set_general_thread (tinfo->ptid);
13868 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
13870 getpkt (&rs->buf, 0);
13872 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
13874 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
13875 error (_("Could not disable branch tracing for %s: %s"),
13876 target_pid_to_str (tinfo->ptid), &rs->buf[2]);
13878 error (_("Could not disable branch tracing for %s."),
13879 target_pid_to_str (tinfo->ptid));
13885 /* Teardown branch tracing. */
13888 remote_target::teardown_btrace (struct btrace_target_info *tinfo)
13890 /* We must not talk to the target during teardown. */
13894 /* Read the branch trace. */
13897 remote_target::read_btrace (struct btrace_data *btrace,
13898 struct btrace_target_info *tinfo,
13899 enum btrace_read_type type)
13901 struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
13904 if (packet_config_support (packet) != PACKET_ENABLE)
13905 error (_("Target does not support branch tracing."));
13907 #if !defined(HAVE_LIBEXPAT)
13908 error (_("Cannot process branch tracing result. XML parsing not supported."));
13913 case BTRACE_READ_ALL:
13916 case BTRACE_READ_NEW:
13919 case BTRACE_READ_DELTA:
13923 internal_error (__FILE__, __LINE__,
13924 _("Bad branch tracing read type: %u."),
13925 (unsigned int) type);
13928 gdb::optional<gdb::char_vector> xml
13929 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE, annex);
13931 return BTRACE_ERR_UNKNOWN;
13933 parse_xml_btrace (btrace, xml->data ());
13935 return BTRACE_ERR_NONE;
13938 const struct btrace_config *
13939 remote_target::btrace_conf (const struct btrace_target_info *tinfo)
13941 return &tinfo->conf;
13945 remote_target::augmented_libraries_svr4_read ()
13947 return (packet_support (PACKET_augmented_libraries_svr4_read_feature)
13951 /* Implementation of to_load. */
13954 remote_target::load (const char *name, int from_tty)
13956 generic_load (name, from_tty);
13959 /* Accepts an integer PID; returns a string representing a file that
13960 can be opened on the remote side to get the symbols for the child
13961 process. Returns NULL if the operation is not supported. */
13964 remote_target::pid_to_exec_file (int pid)
13966 static gdb::optional<gdb::char_vector> filename;
13967 struct inferior *inf;
13968 char *annex = NULL;
13970 if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE)
13973 inf = find_inferior_pid (pid);
13975 internal_error (__FILE__, __LINE__,
13976 _("not currently attached to process %d"), pid);
13978 if (!inf->fake_pid_p)
13980 const int annex_size = 9;
13982 annex = (char *) alloca (annex_size);
13983 xsnprintf (annex, annex_size, "%x", pid);
13986 filename = target_read_stralloc (current_top_target (),
13987 TARGET_OBJECT_EXEC_FILE, annex);
13989 return filename ? filename->data () : nullptr;
13992 /* Implement the to_can_do_single_step target_ops method. */
13995 remote_target::can_do_single_step ()
13997 /* We can only tell whether target supports single step or not by
13998 supported s and S vCont actions if the stub supports vContSupported
13999 feature. If the stub doesn't support vContSupported feature,
14000 we have conservatively to think target doesn't supports single
14002 if (packet_support (PACKET_vContSupported) == PACKET_ENABLE)
14004 struct remote_state *rs = get_remote_state ();
14006 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
14007 remote_vcont_probe ();
14009 return rs->supports_vCont.s && rs->supports_vCont.S;
14015 /* Implementation of the to_execution_direction method for the remote
14018 enum exec_direction_kind
14019 remote_target::execution_direction ()
14021 struct remote_state *rs = get_remote_state ();
14023 return rs->last_resume_exec_dir;
14026 /* Return pointer to the thread_info struct which corresponds to
14027 THREAD_HANDLE (having length HANDLE_LEN). */
14030 remote_target::thread_handle_to_thread_info (const gdb_byte *thread_handle,
14034 for (thread_info *tp : all_non_exited_threads ())
14036 remote_thread_info *priv = get_remote_thread_info (tp);
14038 if (tp->inf == inf && priv != NULL)
14040 if (handle_len != priv->thread_handle.size ())
14041 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14042 handle_len, priv->thread_handle.size ());
14043 if (memcmp (thread_handle, priv->thread_handle.data (),
14053 remote_target::can_async_p ()
14055 struct remote_state *rs = get_remote_state ();
14057 /* We don't go async if the user has explicitly prevented it with the
14058 "maint set target-async" command. */
14059 if (!target_async_permitted)
14062 /* We're async whenever the serial device is. */
14063 return serial_can_async_p (rs->remote_desc);
14067 remote_target::is_async_p ()
14069 struct remote_state *rs = get_remote_state ();
14071 if (!target_async_permitted)
14072 /* We only enable async when the user specifically asks for it. */
14075 /* We're async whenever the serial device is. */
14076 return serial_is_async_p (rs->remote_desc);
14079 /* Pass the SERIAL event on and up to the client. One day this code
14080 will be able to delay notifying the client of an event until the
14081 point where an entire packet has been received. */
14083 static serial_event_ftype remote_async_serial_handler;
14086 remote_async_serial_handler (struct serial *scb, void *context)
14088 /* Don't propogate error information up to the client. Instead let
14089 the client find out about the error by querying the target. */
14090 inferior_event_handler (INF_REG_EVENT, NULL);
14094 remote_async_inferior_event_handler (gdb_client_data data)
14096 inferior_event_handler (INF_REG_EVENT, data);
14100 remote_target::async (int enable)
14102 struct remote_state *rs = get_remote_state ();
14106 serial_async (rs->remote_desc, remote_async_serial_handler, rs);
14108 /* If there are pending events in the stop reply queue tell the
14109 event loop to process them. */
14110 if (!rs->stop_reply_queue.empty ())
14111 mark_async_event_handler (rs->remote_async_inferior_event_token);
14112 /* For simplicity, below we clear the pending events token
14113 without remembering whether it is marked, so here we always
14114 mark it. If there's actually no pending notification to
14115 process, this ends up being a no-op (other than a spurious
14116 event-loop wakeup). */
14117 if (target_is_non_stop_p ())
14118 mark_async_event_handler (rs->notif_state->get_pending_events_token);
14122 serial_async (rs->remote_desc, NULL, NULL);
14123 /* If the core is disabling async, it doesn't want to be
14124 disturbed with target events. Clear all async event sources
14126 clear_async_event_handler (rs->remote_async_inferior_event_token);
14127 if (target_is_non_stop_p ())
14128 clear_async_event_handler (rs->notif_state->get_pending_events_token);
14132 /* Implementation of the to_thread_events method. */
14135 remote_target::thread_events (int enable)
14137 struct remote_state *rs = get_remote_state ();
14138 size_t size = get_remote_packet_size ();
14140 if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE)
14143 xsnprintf (rs->buf.data (), size, "QThreadEvents:%x", enable ? 1 : 0);
14145 getpkt (&rs->buf, 0);
14147 switch (packet_ok (rs->buf,
14148 &remote_protocol_packets[PACKET_QThreadEvents]))
14151 if (strcmp (rs->buf.data (), "OK") != 0)
14152 error (_("Remote refused setting thread events: %s"), rs->buf.data ());
14155 warning (_("Remote failure reply: %s"), rs->buf.data ());
14157 case PACKET_UNKNOWN:
14163 set_remote_cmd (const char *args, int from_tty)
14165 help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout);
14169 show_remote_cmd (const char *args, int from_tty)
14171 /* We can't just use cmd_show_list here, because we want to skip
14172 the redundant "show remote Z-packet" and the legacy aliases. */
14173 struct cmd_list_element *list = remote_show_cmdlist;
14174 struct ui_out *uiout = current_uiout;
14176 ui_out_emit_tuple tuple_emitter (uiout, "showlist");
14177 for (; list != NULL; list = list->next)
14178 if (strcmp (list->name, "Z-packet") == 0)
14180 else if (list->type == not_set_cmd)
14181 /* Alias commands are exactly like the original, except they
14182 don't have the normal type. */
14186 ui_out_emit_tuple option_emitter (uiout, "option");
14188 uiout->field_string ("name", list->name);
14189 uiout->text (": ");
14190 if (list->type == show_cmd)
14191 do_show_command (NULL, from_tty, list);
14193 cmd_func (list, NULL, from_tty);
14198 /* Function to be called whenever a new objfile (shlib) is detected. */
14200 remote_new_objfile (struct objfile *objfile)
14202 remote_target *remote = get_current_remote_target ();
14204 if (remote != NULL) /* Have a remote connection. */
14205 remote->remote_check_symbols ();
14208 /* Pull all the tracepoints defined on the target and create local
14209 data structures representing them. We don't want to create real
14210 tracepoints yet, we don't want to mess up the user's existing
14214 remote_target::upload_tracepoints (struct uploaded_tp **utpp)
14216 struct remote_state *rs = get_remote_state ();
14219 /* Ask for a first packet of tracepoint definition. */
14221 getpkt (&rs->buf, 0);
14222 p = rs->buf.data ();
14223 while (*p && *p != 'l')
14225 parse_tracepoint_definition (p, utpp);
14226 /* Ask for another packet of tracepoint definition. */
14228 getpkt (&rs->buf, 0);
14229 p = rs->buf.data ();
14235 remote_target::upload_trace_state_variables (struct uploaded_tsv **utsvp)
14237 struct remote_state *rs = get_remote_state ();
14240 /* Ask for a first packet of variable definition. */
14242 getpkt (&rs->buf, 0);
14243 p = rs->buf.data ();
14244 while (*p && *p != 'l')
14246 parse_tsv_definition (p, utsvp);
14247 /* Ask for another packet of variable definition. */
14249 getpkt (&rs->buf, 0);
14250 p = rs->buf.data ();
14255 /* The "set/show range-stepping" show hook. */
14258 show_range_stepping (struct ui_file *file, int from_tty,
14259 struct cmd_list_element *c,
14262 fprintf_filtered (file,
14263 _("Debugger's willingness to use range stepping "
14264 "is %s.\n"), value);
14267 /* Return true if the vCont;r action is supported by the remote
14271 remote_target::vcont_r_supported ()
14273 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
14274 remote_vcont_probe ();
14276 return (packet_support (PACKET_vCont) == PACKET_ENABLE
14277 && get_remote_state ()->supports_vCont.r);
14280 /* The "set/show range-stepping" set hook. */
14283 set_range_stepping (const char *ignore_args, int from_tty,
14284 struct cmd_list_element *c)
14286 /* When enabling, check whether range stepping is actually supported
14287 by the target, and warn if not. */
14288 if (use_range_stepping)
14290 remote_target *remote = get_current_remote_target ();
14292 || !remote->vcont_r_supported ())
14293 warning (_("Range stepping is not supported by the current target"));
14298 _initialize_remote (void)
14300 struct cmd_list_element *cmd;
14301 const char *cmd_name;
14303 /* architecture specific data */
14304 remote_g_packet_data_handle =
14305 gdbarch_data_register_pre_init (remote_g_packet_data_init);
14308 = register_program_space_data_with_cleanup (NULL,
14309 remote_pspace_data_cleanup);
14311 add_target (remote_target_info, remote_target::open);
14312 add_target (extended_remote_target_info, extended_remote_target::open);
14314 /* Hook into new objfile notification. */
14315 gdb::observers::new_objfile.attach (remote_new_objfile);
14318 init_remote_threadtests ();
14321 /* set/show remote ... */
14323 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
14324 Remote protocol specific variables\n\
14325 Configure various remote-protocol specific variables such as\n\
14326 the packets being used"),
14327 &remote_set_cmdlist, "set remote ",
14328 0 /* allow-unknown */, &setlist);
14329 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
14330 Remote protocol specific variables\n\
14331 Configure various remote-protocol specific variables such as\n\
14332 the packets being used"),
14333 &remote_show_cmdlist, "show remote ",
14334 0 /* allow-unknown */, &showlist);
14336 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
14337 Compare section data on target to the exec file.\n\
14338 Argument is a single section name (default: all loaded sections).\n\
14339 To compare only read-only loaded sections, specify the -r option."),
14342 add_cmd ("packet", class_maintenance, packet_command, _("\
14343 Send an arbitrary packet to a remote target.\n\
14344 maintenance packet TEXT\n\
14345 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14346 this command sends the string TEXT to the inferior, and displays the\n\
14347 response packet. GDB supplies the initial `$' character, and the\n\
14348 terminating `#' character and checksum."),
14351 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
14352 Set whether to send break if interrupted."), _("\
14353 Show whether to send break if interrupted."), _("\
14354 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14355 set_remotebreak, show_remotebreak,
14356 &setlist, &showlist);
14357 cmd_name = "remotebreak";
14358 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
14359 deprecate_cmd (cmd, "set remote interrupt-sequence");
14360 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
14361 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
14362 deprecate_cmd (cmd, "show remote interrupt-sequence");
14364 add_setshow_enum_cmd ("interrupt-sequence", class_support,
14365 interrupt_sequence_modes, &interrupt_sequence_mode,
14367 Set interrupt sequence to remote target."), _("\
14368 Show interrupt sequence to remote target."), _("\
14369 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14370 NULL, show_interrupt_sequence,
14371 &remote_set_cmdlist,
14372 &remote_show_cmdlist);
14374 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
14375 &interrupt_on_connect, _("\
14376 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14377 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14378 If set, interrupt sequence is sent to remote target."),
14380 &remote_set_cmdlist, &remote_show_cmdlist);
14382 /* Install commands for configuring memory read/write packets. */
14384 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
14385 Set the maximum number of bytes per memory write packet (deprecated)."),
14387 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
14388 Show the maximum number of bytes per memory write packet (deprecated)."),
14390 add_cmd ("memory-write-packet-size", no_class,
14391 set_memory_write_packet_size, _("\
14392 Set the maximum number of bytes per memory-write packet.\n\
14393 Specify the number of bytes in a packet or 0 (zero) for the\n\
14394 default packet size. The actual limit is further reduced\n\
14395 dependent on the target. Specify ``fixed'' to disable the\n\
14396 further restriction and ``limit'' to enable that restriction."),
14397 &remote_set_cmdlist);
14398 add_cmd ("memory-read-packet-size", no_class,
14399 set_memory_read_packet_size, _("\
14400 Set the maximum number of bytes per memory-read packet.\n\
14401 Specify the number of bytes in a packet or 0 (zero) for the\n\
14402 default packet size. The actual limit is further reduced\n\
14403 dependent on the target. Specify ``fixed'' to disable the\n\
14404 further restriction and ``limit'' to enable that restriction."),
14405 &remote_set_cmdlist);
14406 add_cmd ("memory-write-packet-size", no_class,
14407 show_memory_write_packet_size,
14408 _("Show the maximum number of bytes per memory-write packet."),
14409 &remote_show_cmdlist);
14410 add_cmd ("memory-read-packet-size", no_class,
14411 show_memory_read_packet_size,
14412 _("Show the maximum number of bytes per memory-read packet."),
14413 &remote_show_cmdlist);
14415 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class,
14416 &remote_hw_watchpoint_limit, _("\
14417 Set the maximum number of target hardware watchpoints."), _("\
14418 Show the maximum number of target hardware watchpoints."), _("\
14419 Specify \"unlimited\" for unlimited hardware watchpoints."),
14420 NULL, show_hardware_watchpoint_limit,
14421 &remote_set_cmdlist,
14422 &remote_show_cmdlist);
14423 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14425 &remote_hw_watchpoint_length_limit, _("\
14426 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14427 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14428 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14429 NULL, show_hardware_watchpoint_length_limit,
14430 &remote_set_cmdlist, &remote_show_cmdlist);
14431 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class,
14432 &remote_hw_breakpoint_limit, _("\
14433 Set the maximum number of target hardware breakpoints."), _("\
14434 Show the maximum number of target hardware breakpoints."), _("\
14435 Specify \"unlimited\" for unlimited hardware breakpoints."),
14436 NULL, show_hardware_breakpoint_limit,
14437 &remote_set_cmdlist, &remote_show_cmdlist);
14439 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure,
14440 &remote_address_size, _("\
14441 Set the maximum size of the address (in bits) in a memory packet."), _("\
14442 Show the maximum size of the address (in bits) in a memory packet."), NULL,
14444 NULL, /* FIXME: i18n: */
14445 &setlist, &showlist);
14447 init_all_packet_configs ();
14449 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
14450 "X", "binary-download", 1);
14452 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
14453 "vCont", "verbose-resume", 0);
14455 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
14456 "QPassSignals", "pass-signals", 0);
14458 add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls],
14459 "QCatchSyscalls", "catch-syscalls", 0);
14461 add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals],
14462 "QProgramSignals", "program-signals", 0);
14464 add_packet_config_cmd (&remote_protocol_packets[PACKET_QSetWorkingDir],
14465 "QSetWorkingDir", "set-working-dir", 0);
14467 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartupWithShell],
14468 "QStartupWithShell", "startup-with-shell", 0);
14470 add_packet_config_cmd (&remote_protocol_packets
14471 [PACKET_QEnvironmentHexEncoded],
14472 "QEnvironmentHexEncoded", "environment-hex-encoded",
14475 add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentReset],
14476 "QEnvironmentReset", "environment-reset",
14479 add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentUnset],
14480 "QEnvironmentUnset", "environment-unset",
14483 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
14484 "qSymbol", "symbol-lookup", 0);
14486 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
14487 "P", "set-register", 1);
14489 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
14490 "p", "fetch-register", 1);
14492 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
14493 "Z0", "software-breakpoint", 0);
14495 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
14496 "Z1", "hardware-breakpoint", 0);
14498 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
14499 "Z2", "write-watchpoint", 0);
14501 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
14502 "Z3", "read-watchpoint", 0);
14504 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
14505 "Z4", "access-watchpoint", 0);
14507 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
14508 "qXfer:auxv:read", "read-aux-vector", 0);
14510 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file],
14511 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14513 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
14514 "qXfer:features:read", "target-features", 0);
14516 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
14517 "qXfer:libraries:read", "library-info", 0);
14519 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
14520 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14522 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
14523 "qXfer:memory-map:read", "memory-map", 0);
14525 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
14526 "qXfer:spu:read", "read-spu-object", 0);
14528 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
14529 "qXfer:spu:write", "write-spu-object", 0);
14531 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
14532 "qXfer:osdata:read", "osdata", 0);
14534 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
14535 "qXfer:threads:read", "threads", 0);
14537 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
14538 "qXfer:siginfo:read", "read-siginfo-object", 0);
14540 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
14541 "qXfer:siginfo:write", "write-siginfo-object", 0);
14543 add_packet_config_cmd
14544 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
14545 "qXfer:traceframe-info:read", "traceframe-info", 0);
14547 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib],
14548 "qXfer:uib:read", "unwind-info-block", 0);
14550 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
14551 "qGetTLSAddr", "get-thread-local-storage-address",
14554 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
14555 "qGetTIBAddr", "get-thread-information-block-address",
14558 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
14559 "bc", "reverse-continue", 0);
14561 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
14562 "bs", "reverse-step", 0);
14564 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
14565 "qSupported", "supported-packets", 0);
14567 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
14568 "qSearch:memory", "search-memory", 0);
14570 add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus],
14571 "qTStatus", "trace-status", 0);
14573 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs],
14574 "vFile:setfs", "hostio-setfs", 0);
14576 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
14577 "vFile:open", "hostio-open", 0);
14579 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
14580 "vFile:pread", "hostio-pread", 0);
14582 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
14583 "vFile:pwrite", "hostio-pwrite", 0);
14585 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
14586 "vFile:close", "hostio-close", 0);
14588 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
14589 "vFile:unlink", "hostio-unlink", 0);
14591 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
14592 "vFile:readlink", "hostio-readlink", 0);
14594 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat],
14595 "vFile:fstat", "hostio-fstat", 0);
14597 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
14598 "vAttach", "attach", 0);
14600 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
14603 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
14604 "QStartNoAckMode", "noack", 0);
14606 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
14607 "vKill", "kill", 0);
14609 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
14610 "qAttached", "query-attached", 0);
14612 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
14613 "ConditionalTracepoints",
14614 "conditional-tracepoints", 0);
14616 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
14617 "ConditionalBreakpoints",
14618 "conditional-breakpoints", 0);
14620 add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands],
14621 "BreakpointCommands",
14622 "breakpoint-commands", 0);
14624 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
14625 "FastTracepoints", "fast-tracepoints", 0);
14627 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
14628 "TracepointSource", "TracepointSource", 0);
14630 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
14631 "QAllow", "allow", 0);
14633 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
14634 "StaticTracepoints", "static-tracepoints", 0);
14636 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
14637 "InstallInTrace", "install-in-trace", 0);
14639 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
14640 "qXfer:statictrace:read", "read-sdata-object", 0);
14642 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
14643 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14645 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
14646 "QDisableRandomization", "disable-randomization", 0);
14648 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent],
14649 "QAgent", "agent", 0);
14651 add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size],
14652 "QTBuffer:size", "trace-buffer-size", 0);
14654 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off],
14655 "Qbtrace:off", "disable-btrace", 0);
14657 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
14658 "Qbtrace:bts", "enable-btrace-bts", 0);
14660 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt],
14661 "Qbtrace:pt", "enable-btrace-pt", 0);
14663 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
14664 "qXfer:btrace", "read-btrace", 0);
14666 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf],
14667 "qXfer:btrace-conf", "read-btrace-conf", 0);
14669 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size],
14670 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14672 add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature],
14673 "multiprocess-feature", "multiprocess-feature", 0);
14675 add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature],
14676 "swbreak-feature", "swbreak-feature", 0);
14678 add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature],
14679 "hwbreak-feature", "hwbreak-feature", 0);
14681 add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature],
14682 "fork-event-feature", "fork-event-feature", 0);
14684 add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature],
14685 "vfork-event-feature", "vfork-event-feature", 0);
14687 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size],
14688 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14690 add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported],
14691 "vContSupported", "verbose-resume-supported", 0);
14693 add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature],
14694 "exec-event-feature", "exec-event-feature", 0);
14696 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC],
14697 "vCtrlC", "ctrl-c", 0);
14699 add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents],
14700 "QThreadEvents", "thread-events", 0);
14702 add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed],
14703 "N stop reply", "no-resumed-stop-reply", 0);
14705 /* Assert that we've registered "set remote foo-packet" commands
14706 for all packet configs. */
14710 for (i = 0; i < PACKET_MAX; i++)
14712 /* Ideally all configs would have a command associated. Some
14713 still don't though. */
14718 case PACKET_QNonStop:
14719 case PACKET_EnableDisableTracepoints_feature:
14720 case PACKET_tracenz_feature:
14721 case PACKET_DisconnectedTracing_feature:
14722 case PACKET_augmented_libraries_svr4_read_feature:
14724 /* Additions to this list need to be well justified:
14725 pre-existing packets are OK; new packets are not. */
14733 /* This catches both forgetting to add a config command, and
14734 forgetting to remove a packet from the exception list. */
14735 gdb_assert (excepted == (remote_protocol_packets[i].name == NULL));
14739 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14740 Z sub-packet has its own set and show commands, but users may
14741 have sets to this variable in their .gdbinit files (or in their
14743 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
14744 &remote_Z_packet_detect, _("\
14745 Set use of remote protocol `Z' packets"), _("\
14746 Show use of remote protocol `Z' packets "), _("\
14747 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14749 set_remote_protocol_Z_packet_cmd,
14750 show_remote_protocol_Z_packet_cmd,
14751 /* FIXME: i18n: Use of remote protocol
14752 `Z' packets is %s. */
14753 &remote_set_cmdlist, &remote_show_cmdlist);
14755 add_prefix_cmd ("remote", class_files, remote_command, _("\
14756 Manipulate files on the remote system\n\
14757 Transfer files to and from the remote target system."),
14758 &remote_cmdlist, "remote ",
14759 0 /* allow-unknown */, &cmdlist);
14761 add_cmd ("put", class_files, remote_put_command,
14762 _("Copy a local file to the remote system."),
14765 add_cmd ("get", class_files, remote_get_command,
14766 _("Copy a remote file to the local system."),
14769 add_cmd ("delete", class_files, remote_delete_command,
14770 _("Delete a remote file."),
14773 add_setshow_string_noescape_cmd ("exec-file", class_files,
14774 &remote_exec_file_var, _("\
14775 Set the remote pathname for \"run\""), _("\
14776 Show the remote pathname for \"run\""), NULL,
14777 set_remote_exec_file,
14778 show_remote_exec_file,
14779 &remote_set_cmdlist,
14780 &remote_show_cmdlist);
14782 add_setshow_boolean_cmd ("range-stepping", class_run,
14783 &use_range_stepping, _("\
14784 Enable or disable range stepping."), _("\
14785 Show whether target-assisted range stepping is enabled."), _("\
14786 If on, and the target supports it, when stepping a source line, GDB\n\
14787 tells the target to step the corresponding range of addresses itself instead\n\
14788 of issuing multiple single-steps. This speeds up source level\n\
14789 stepping. If off, GDB always issues single-steps, even if range\n\
14790 stepping is supported by the target. The default is on."),
14791 set_range_stepping,
14792 show_range_stepping,
14796 /* Eventually initialize fileio. See fileio.c */
14797 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
14799 /* Take advantage of the fact that the TID field is not used, to tag
14800 special ptids with it set to != 0. */
14801 magic_null_ptid = ptid_t (42000, -1, 1);
14802 not_sent_ptid = ptid_t (42000, -2, 1);
14803 any_thread_ptid = ptid_t (42000, 0, 1);