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 (std::move (target_holder));
5552 /* Register extra event sources in the event loop. */
5553 rs->remote_async_inferior_event_token
5554 = create_async_event_handler (remote_async_inferior_event_handler,
5556 rs->notif_state = remote_notif_state_allocate (remote);
5558 /* Reset the target state; these things will be queried either by
5559 remote_query_supported or as they are needed. */
5560 reset_all_packet_configs_support ();
5561 rs->cached_wait_status = 0;
5562 rs->explicit_packet_size = 0;
5564 rs->extended = extended_p;
5565 rs->waiting_for_stop_reply = 0;
5566 rs->ctrlc_pending_p = 0;
5567 rs->got_ctrlc_during_io = 0;
5569 rs->general_thread = not_sent_ptid;
5570 rs->continue_thread = not_sent_ptid;
5571 rs->remote_traceframe_number = -1;
5573 rs->last_resume_exec_dir = EXEC_FORWARD;
5575 /* Probe for ability to use "ThreadInfo" query, as required. */
5576 rs->use_threadinfo_query = 1;
5577 rs->use_threadextra_query = 1;
5579 rs->readahead_cache.invalidate ();
5581 if (target_async_permitted)
5583 /* FIXME: cagney/1999-09-23: During the initial connection it is
5584 assumed that the target is already ready and able to respond to
5585 requests. Unfortunately remote_start_remote() eventually calls
5586 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5587 around this. Eventually a mechanism that allows
5588 wait_for_inferior() to expect/get timeouts will be
5590 rs->wait_forever_enabled_p = 0;
5593 /* First delete any symbols previously loaded from shared libraries. */
5594 no_shared_libraries (NULL, 0);
5596 /* Start the remote connection. If error() or QUIT, discard this
5597 target (we'd otherwise be in an inconsistent state) and then
5598 propogate the error on up the exception chain. This ensures that
5599 the caller doesn't stumble along blindly assuming that the
5600 function succeeded. The CLI doesn't have this problem but other
5601 UI's, such as MI do.
5603 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5604 this function should return an error indication letting the
5605 caller restore the previous state. Unfortunately the command
5606 ``target remote'' is directly wired to this function making that
5607 impossible. On a positive note, the CLI side of this problem has
5608 been fixed - the function set_cmd_context() makes it possible for
5609 all the ``target ....'' commands to share a common callback
5610 function. See cli-dump.c. */
5615 remote->start_remote (from_tty, extended_p);
5617 CATCH (ex, RETURN_MASK_ALL)
5619 /* Pop the partially set up target - unless something else did
5620 already before throwing the exception. */
5621 if (ex.error != TARGET_CLOSE_ERROR)
5622 remote_unpush_target ();
5623 throw_exception (ex);
5628 remote_btrace_reset (rs);
5630 if (target_async_permitted)
5631 rs->wait_forever_enabled_p = 1;
5634 /* Detach the specified process. */
5637 remote_target::remote_detach_pid (int pid)
5639 struct remote_state *rs = get_remote_state ();
5641 /* This should not be necessary, but the handling for D;PID in
5642 GDBserver versions prior to 8.2 incorrectly assumes that the
5643 selected process points to the same process we're detaching,
5644 leading to misbehavior (and possibly GDBserver crashing) when it
5645 does not. Since it's easy and cheap, work around it by forcing
5646 GDBserver to select GDB's current process. */
5647 set_general_process ();
5649 if (remote_multi_process_p (rs))
5650 xsnprintf (rs->buf.data (), get_remote_packet_size (), "D;%x", pid);
5652 strcpy (rs->buf.data (), "D");
5655 getpkt (&rs->buf, 0);
5657 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
5659 else if (rs->buf[0] == '\0')
5660 error (_("Remote doesn't know how to detach"));
5662 error (_("Can't detach process."));
5665 /* This detaches a program to which we previously attached, using
5666 inferior_ptid to identify the process. After this is done, GDB
5667 can be used to debug some other program. We better not have left
5668 any breakpoints in the target program or it'll die when it hits
5672 remote_target::remote_detach_1 (inferior *inf, int from_tty)
5674 int pid = inferior_ptid.pid ();
5675 struct remote_state *rs = get_remote_state ();
5678 if (!target_has_execution)
5679 error (_("No process to detach from."));
5681 target_announce_detach (from_tty);
5683 /* Tell the remote target to detach. */
5684 remote_detach_pid (pid);
5686 /* Exit only if this is the only active inferior. */
5687 if (from_tty && !rs->extended && number_of_live_inferiors () == 1)
5688 puts_filtered (_("Ending remote debugging.\n"));
5690 struct thread_info *tp = find_thread_ptid (inferior_ptid);
5692 /* Check to see if we are detaching a fork parent. Note that if we
5693 are detaching a fork child, tp == NULL. */
5694 is_fork_parent = (tp != NULL
5695 && tp->pending_follow.kind == TARGET_WAITKIND_FORKED);
5697 /* If doing detach-on-fork, we don't mourn, because that will delete
5698 breakpoints that should be available for the followed inferior. */
5699 if (!is_fork_parent)
5701 /* Save the pid as a string before mourning, since that will
5702 unpush the remote target, and we need the string after. */
5703 std::string infpid = target_pid_to_str (ptid_t (pid));
5705 target_mourn_inferior (inferior_ptid);
5706 if (print_inferior_events)
5707 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5708 inf->num, infpid.c_str ());
5712 inferior_ptid = null_ptid;
5713 detach_inferior (current_inferior ());
5718 remote_target::detach (inferior *inf, int from_tty)
5720 remote_detach_1 (inf, from_tty);
5724 extended_remote_target::detach (inferior *inf, int from_tty)
5726 remote_detach_1 (inf, from_tty);
5729 /* Target follow-fork function for remote targets. On entry, and
5730 at return, the current inferior is the fork parent.
5732 Note that although this is currently only used for extended-remote,
5733 it is named remote_follow_fork in anticipation of using it for the
5734 remote target as well. */
5737 remote_target::follow_fork (int follow_child, int detach_fork)
5739 struct remote_state *rs = get_remote_state ();
5740 enum target_waitkind kind = inferior_thread ()->pending_follow.kind;
5742 if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs))
5743 || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs)))
5745 /* When following the parent and detaching the child, we detach
5746 the child here. For the case of following the child and
5747 detaching the parent, the detach is done in the target-
5748 independent follow fork code in infrun.c. We can't use
5749 target_detach when detaching an unfollowed child because
5750 the client side doesn't know anything about the child. */
5751 if (detach_fork && !follow_child)
5753 /* Detach the fork child. */
5757 child_ptid = inferior_thread ()->pending_follow.value.related_pid;
5758 child_pid = child_ptid.pid ();
5760 remote_detach_pid (child_pid);
5766 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5767 in the program space of the new inferior. On entry and at return the
5768 current inferior is the exec'ing inferior. INF is the new exec'd
5769 inferior, which may be the same as the exec'ing inferior unless
5770 follow-exec-mode is "new". */
5773 remote_target::follow_exec (struct inferior *inf, char *execd_pathname)
5775 /* We know that this is a target file name, so if it has the "target:"
5776 prefix we strip it off before saving it in the program space. */
5777 if (is_target_filename (execd_pathname))
5778 execd_pathname += strlen (TARGET_SYSROOT_PREFIX);
5780 set_pspace_remote_exec_file (inf->pspace, execd_pathname);
5783 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5786 remote_target::disconnect (const char *args, int from_tty)
5789 error (_("Argument given to \"disconnect\" when remotely debugging."));
5791 /* Make sure we unpush even the extended remote targets. Calling
5792 target_mourn_inferior won't unpush, and remote_mourn won't
5793 unpush if there is more than one inferior left. */
5794 unpush_target (this);
5795 generic_mourn_inferior ();
5798 puts_filtered ("Ending remote debugging.\n");
5801 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5802 be chatty about it. */
5805 extended_remote_target::attach (const char *args, int from_tty)
5807 struct remote_state *rs = get_remote_state ();
5809 char *wait_status = NULL;
5811 pid = parse_pid_to_attach (args);
5813 /* Remote PID can be freely equal to getpid, do not check it here the same
5814 way as in other targets. */
5816 if (packet_support (PACKET_vAttach) == PACKET_DISABLE)
5817 error (_("This target does not support attaching to a process"));
5821 char *exec_file = get_exec_file (0);
5824 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
5825 target_pid_to_str (ptid_t (pid)));
5827 printf_unfiltered (_("Attaching to %s\n"),
5828 target_pid_to_str (ptid_t (pid)));
5831 xsnprintf (rs->buf.data (), get_remote_packet_size (), "vAttach;%x", pid);
5833 getpkt (&rs->buf, 0);
5835 switch (packet_ok (rs->buf,
5836 &remote_protocol_packets[PACKET_vAttach]))
5839 if (!target_is_non_stop_p ())
5841 /* Save the reply for later. */
5842 wait_status = (char *) alloca (strlen (rs->buf.data ()) + 1);
5843 strcpy (wait_status, rs->buf.data ());
5845 else if (strcmp (rs->buf.data (), "OK") != 0)
5846 error (_("Attaching to %s failed with: %s"),
5847 target_pid_to_str (ptid_t (pid)),
5850 case PACKET_UNKNOWN:
5851 error (_("This target does not support attaching to a process"));
5853 error (_("Attaching to %s failed"),
5854 target_pid_to_str (ptid_t (pid)));
5857 set_current_inferior (remote_add_inferior (0, pid, 1, 0));
5859 inferior_ptid = ptid_t (pid);
5861 if (target_is_non_stop_p ())
5863 struct thread_info *thread;
5865 /* Get list of threads. */
5866 update_thread_list ();
5868 thread = first_thread_of_inferior (current_inferior ());
5870 inferior_ptid = thread->ptid;
5872 inferior_ptid = ptid_t (pid);
5874 /* Invalidate our notion of the remote current thread. */
5875 record_currthread (rs, minus_one_ptid);
5879 /* Now, if we have thread information, update inferior_ptid. */
5880 inferior_ptid = remote_current_thread (inferior_ptid);
5882 /* Add the main thread to the thread list. */
5883 thread_info *thr = add_thread_silent (inferior_ptid);
5884 /* Don't consider the thread stopped until we've processed the
5885 saved stop reply. */
5886 set_executing (thr->ptid, true);
5889 /* Next, if the target can specify a description, read it. We do
5890 this before anything involving memory or registers. */
5891 target_find_description ();
5893 if (!target_is_non_stop_p ())
5895 /* Use the previously fetched status. */
5896 gdb_assert (wait_status != NULL);
5898 if (target_can_async_p ())
5900 struct notif_event *reply
5901 = remote_notif_parse (this, ¬if_client_stop, wait_status);
5903 push_stop_reply ((struct stop_reply *) reply);
5909 gdb_assert (wait_status != NULL);
5910 strcpy (rs->buf.data (), wait_status);
5911 rs->cached_wait_status = 1;
5915 gdb_assert (wait_status == NULL);
5918 /* Implementation of the to_post_attach method. */
5921 extended_remote_target::post_attach (int pid)
5923 /* Get text, data & bss offsets. */
5926 /* In certain cases GDB might not have had the chance to start
5927 symbol lookup up until now. This could happen if the debugged
5928 binary is not using shared libraries, the vsyscall page is not
5929 present (on Linux) and the binary itself hadn't changed since the
5930 debugging process was started. */
5931 if (symfile_objfile != NULL)
5932 remote_check_symbols();
5936 /* Check for the availability of vCont. This function should also check
5940 remote_target::remote_vcont_probe ()
5942 remote_state *rs = get_remote_state ();
5945 strcpy (rs->buf.data (), "vCont?");
5947 getpkt (&rs->buf, 0);
5948 buf = rs->buf.data ();
5950 /* Make sure that the features we assume are supported. */
5951 if (startswith (buf, "vCont"))
5954 int support_c, support_C;
5956 rs->supports_vCont.s = 0;
5957 rs->supports_vCont.S = 0;
5960 rs->supports_vCont.t = 0;
5961 rs->supports_vCont.r = 0;
5962 while (p && *p == ';')
5965 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
5966 rs->supports_vCont.s = 1;
5967 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
5968 rs->supports_vCont.S = 1;
5969 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
5971 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
5973 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
5974 rs->supports_vCont.t = 1;
5975 else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0))
5976 rs->supports_vCont.r = 1;
5978 p = strchr (p, ';');
5981 /* If c, and C are not all supported, we can't use vCont. Clearing
5982 BUF will make packet_ok disable the packet. */
5983 if (!support_c || !support_C)
5987 packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCont]);
5990 /* Helper function for building "vCont" resumptions. Write a
5991 resumption to P. ENDP points to one-passed-the-end of the buffer
5992 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5993 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5994 resumed thread should be single-stepped and/or signalled. If PTID
5995 equals minus_one_ptid, then all threads are resumed; if PTID
5996 represents a process, then all threads of the process are resumed;
5997 the thread to be stepped and/or signalled is given in the global
6001 remote_target::append_resumption (char *p, char *endp,
6002 ptid_t ptid, int step, gdb_signal siggnal)
6004 struct remote_state *rs = get_remote_state ();
6006 if (step && siggnal != GDB_SIGNAL_0)
6007 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
6009 /* GDB is willing to range step. */
6010 && use_range_stepping
6011 /* Target supports range stepping. */
6012 && rs->supports_vCont.r
6013 /* We don't currently support range stepping multiple
6014 threads with a wildcard (though the protocol allows it,
6015 so stubs shouldn't make an active effort to forbid
6017 && !(remote_multi_process_p (rs) && ptid.is_pid ()))
6019 struct thread_info *tp;
6021 if (ptid == minus_one_ptid)
6023 /* If we don't know about the target thread's tid, then
6024 we're resuming magic_null_ptid (see caller). */
6025 tp = find_thread_ptid (magic_null_ptid);
6028 tp = find_thread_ptid (ptid);
6029 gdb_assert (tp != NULL);
6031 if (tp->control.may_range_step)
6033 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
6035 p += xsnprintf (p, endp - p, ";r%s,%s",
6036 phex_nz (tp->control.step_range_start,
6038 phex_nz (tp->control.step_range_end,
6042 p += xsnprintf (p, endp - p, ";s");
6045 p += xsnprintf (p, endp - p, ";s");
6046 else if (siggnal != GDB_SIGNAL_0)
6047 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
6049 p += xsnprintf (p, endp - p, ";c");
6051 if (remote_multi_process_p (rs) && ptid.is_pid ())
6055 /* All (-1) threads of process. */
6056 nptid = ptid_t (ptid.pid (), -1, 0);
6058 p += xsnprintf (p, endp - p, ":");
6059 p = write_ptid (p, endp, nptid);
6061 else if (ptid != minus_one_ptid)
6063 p += xsnprintf (p, endp - p, ":");
6064 p = write_ptid (p, endp, ptid);
6070 /* Clear the thread's private info on resume. */
6073 resume_clear_thread_private_info (struct thread_info *thread)
6075 if (thread->priv != NULL)
6077 remote_thread_info *priv = get_remote_thread_info (thread);
6079 priv->stop_reason = TARGET_STOPPED_BY_NO_REASON;
6080 priv->watch_data_address = 0;
6084 /* Append a vCont continue-with-signal action for threads that have a
6085 non-zero stop signal. */
6088 remote_target::append_pending_thread_resumptions (char *p, char *endp,
6091 for (thread_info *thread : all_non_exited_threads (ptid))
6092 if (inferior_ptid != thread->ptid
6093 && thread->suspend.stop_signal != GDB_SIGNAL_0)
6095 p = append_resumption (p, endp, thread->ptid,
6096 0, thread->suspend.stop_signal);
6097 thread->suspend.stop_signal = GDB_SIGNAL_0;
6098 resume_clear_thread_private_info (thread);
6104 /* Set the target running, using the packets that use Hc
6108 remote_target::remote_resume_with_hc (ptid_t ptid, int step,
6111 struct remote_state *rs = get_remote_state ();
6114 rs->last_sent_signal = siggnal;
6115 rs->last_sent_step = step;
6117 /* The c/s/C/S resume packets use Hc, so set the continue
6119 if (ptid == minus_one_ptid)
6120 set_continue_thread (any_thread_ptid);
6122 set_continue_thread (ptid);
6124 for (thread_info *thread : all_non_exited_threads ())
6125 resume_clear_thread_private_info (thread);
6127 buf = rs->buf.data ();
6128 if (::execution_direction == EXEC_REVERSE)
6130 /* We don't pass signals to the target in reverse exec mode. */
6131 if (info_verbose && siggnal != GDB_SIGNAL_0)
6132 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6135 if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
6136 error (_("Remote reverse-step not supported."));
6137 if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
6138 error (_("Remote reverse-continue not supported."));
6140 strcpy (buf, step ? "bs" : "bc");
6142 else if (siggnal != GDB_SIGNAL_0)
6144 buf[0] = step ? 'S' : 'C';
6145 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
6146 buf[2] = tohex (((int) siggnal) & 0xf);
6150 strcpy (buf, step ? "s" : "c");
6155 /* Resume the remote inferior by using a "vCont" packet. The thread
6156 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6157 resumed thread should be single-stepped and/or signalled. If PTID
6158 equals minus_one_ptid, then all threads are resumed; the thread to
6159 be stepped and/or signalled is given in the global INFERIOR_PTID.
6160 This function returns non-zero iff it resumes the inferior.
6162 This function issues a strict subset of all possible vCont commands
6166 remote_target::remote_resume_with_vcont (ptid_t ptid, int step,
6167 enum gdb_signal siggnal)
6169 struct remote_state *rs = get_remote_state ();
6173 /* No reverse execution actions defined for vCont. */
6174 if (::execution_direction == EXEC_REVERSE)
6177 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
6178 remote_vcont_probe ();
6180 if (packet_support (PACKET_vCont) == PACKET_DISABLE)
6183 p = rs->buf.data ();
6184 endp = p + get_remote_packet_size ();
6186 /* If we could generate a wider range of packets, we'd have to worry
6187 about overflowing BUF. Should there be a generic
6188 "multi-part-packet" packet? */
6190 p += xsnprintf (p, endp - p, "vCont");
6192 if (ptid == magic_null_ptid)
6194 /* MAGIC_NULL_PTID means that we don't have any active threads,
6195 so we don't have any TID numbers the inferior will
6196 understand. Make sure to only send forms that do not specify
6198 append_resumption (p, endp, minus_one_ptid, step, siggnal);
6200 else if (ptid == minus_one_ptid || ptid.is_pid ())
6202 /* Resume all threads (of all processes, or of a single
6203 process), with preference for INFERIOR_PTID. This assumes
6204 inferior_ptid belongs to the set of all threads we are about
6206 if (step || siggnal != GDB_SIGNAL_0)
6208 /* Step inferior_ptid, with or without signal. */
6209 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
6212 /* Also pass down any pending signaled resumption for other
6213 threads not the current. */
6214 p = append_pending_thread_resumptions (p, endp, ptid);
6216 /* And continue others without a signal. */
6217 append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0);
6221 /* Scheduler locking; resume only PTID. */
6222 append_resumption (p, endp, ptid, step, siggnal);
6225 gdb_assert (strlen (rs->buf.data ()) < get_remote_packet_size ());
6228 if (target_is_non_stop_p ())
6230 /* In non-stop, the stub replies to vCont with "OK". The stop
6231 reply will be reported asynchronously by means of a `%Stop'
6233 getpkt (&rs->buf, 0);
6234 if (strcmp (rs->buf.data (), "OK") != 0)
6235 error (_("Unexpected vCont reply in non-stop mode: %s"),
6242 /* Tell the remote machine to resume. */
6245 remote_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal)
6247 struct remote_state *rs = get_remote_state ();
6249 /* When connected in non-stop mode, the core resumes threads
6250 individually. Resuming remote threads directly in target_resume
6251 would thus result in sending one packet per thread. Instead, to
6252 minimize roundtrip latency, here we just store the resume
6253 request; the actual remote resumption will be done in
6254 target_commit_resume / remote_commit_resume, where we'll be able
6255 to do vCont action coalescing. */
6256 if (target_is_non_stop_p () && ::execution_direction != EXEC_REVERSE)
6258 remote_thread_info *remote_thr;
6260 if (minus_one_ptid == ptid || ptid.is_pid ())
6261 remote_thr = get_remote_thread_info (inferior_ptid);
6263 remote_thr = get_remote_thread_info (ptid);
6265 remote_thr->last_resume_step = step;
6266 remote_thr->last_resume_sig = siggnal;
6270 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6271 (explained in remote-notif.c:handle_notification) so
6272 remote_notif_process is not called. We need find a place where
6273 it is safe to start a 'vNotif' sequence. It is good to do it
6274 before resuming inferior, because inferior was stopped and no RSP
6275 traffic at that moment. */
6276 if (!target_is_non_stop_p ())
6277 remote_notif_process (rs->notif_state, ¬if_client_stop);
6279 rs->last_resume_exec_dir = ::execution_direction;
6281 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6282 if (!remote_resume_with_vcont (ptid, step, siggnal))
6283 remote_resume_with_hc (ptid, step, siggnal);
6285 /* We are about to start executing the inferior, let's register it
6286 with the event loop. NOTE: this is the one place where all the
6287 execution commands end up. We could alternatively do this in each
6288 of the execution commands in infcmd.c. */
6289 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6290 into infcmd.c in order to allow inferior function calls to work
6291 NOT asynchronously. */
6292 if (target_can_async_p ())
6295 /* We've just told the target to resume. The remote server will
6296 wait for the inferior to stop, and then send a stop reply. In
6297 the mean time, we can't start another command/query ourselves
6298 because the stub wouldn't be ready to process it. This applies
6299 only to the base all-stop protocol, however. In non-stop (which
6300 only supports vCont), the stub replies with an "OK", and is
6301 immediate able to process further serial input. */
6302 if (!target_is_non_stop_p ())
6303 rs->waiting_for_stop_reply = 1;
6306 static int is_pending_fork_parent_thread (struct thread_info *thread);
6308 /* Private per-inferior info for target remote processes. */
6310 struct remote_inferior : public private_inferior
6312 /* Whether we can send a wildcard vCont for this process. */
6313 bool may_wildcard_vcont = true;
6316 /* Get the remote private inferior data associated to INF. */
6318 static remote_inferior *
6319 get_remote_inferior (inferior *inf)
6321 if (inf->priv == NULL)
6322 inf->priv.reset (new remote_inferior);
6324 return static_cast<remote_inferior *> (inf->priv.get ());
6327 /* Class used to track the construction of a vCont packet in the
6328 outgoing packet buffer. This is used to send multiple vCont
6329 packets if we have more actions than would fit a single packet. */
6334 explicit vcont_builder (remote_target *remote)
6341 void push_action (ptid_t ptid, bool step, gdb_signal siggnal);
6346 /* The remote target. */
6347 remote_target *m_remote;
6349 /* Pointer to the first action. P points here if no action has been
6351 char *m_first_action;
6353 /* Where the next action will be appended. */
6356 /* The end of the buffer. Must never write past this. */
6360 /* Prepare the outgoing buffer for a new vCont packet. */
6363 vcont_builder::restart ()
6365 struct remote_state *rs = m_remote->get_remote_state ();
6367 m_p = rs->buf.data ();
6368 m_endp = m_p + m_remote->get_remote_packet_size ();
6369 m_p += xsnprintf (m_p, m_endp - m_p, "vCont");
6370 m_first_action = m_p;
6373 /* If the vCont packet being built has any action, send it to the
6377 vcont_builder::flush ()
6379 struct remote_state *rs;
6381 if (m_p == m_first_action)
6384 rs = m_remote->get_remote_state ();
6385 m_remote->putpkt (rs->buf);
6386 m_remote->getpkt (&rs->buf, 0);
6387 if (strcmp (rs->buf.data (), "OK") != 0)
6388 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf.data ());
6391 /* The largest action is range-stepping, with its two addresses. This
6392 is more than sufficient. If a new, bigger action is created, it'll
6393 quickly trigger a failed assertion in append_resumption (and we'll
6395 #define MAX_ACTION_SIZE 200
6397 /* Append a new vCont action in the outgoing packet being built. If
6398 the action doesn't fit the packet along with previous actions, push
6399 what we've got so far to the remote end and start over a new vCont
6400 packet (with the new action). */
6403 vcont_builder::push_action (ptid_t ptid, bool step, gdb_signal siggnal)
6405 char buf[MAX_ACTION_SIZE + 1];
6407 char *endp = m_remote->append_resumption (buf, buf + sizeof (buf),
6408 ptid, step, siggnal);
6410 /* Check whether this new action would fit in the vCont packet along
6411 with previous actions. If not, send what we've got so far and
6412 start a new vCont packet. */
6413 size_t rsize = endp - buf;
6414 if (rsize > m_endp - m_p)
6419 /* Should now fit. */
6420 gdb_assert (rsize <= m_endp - m_p);
6423 memcpy (m_p, buf, rsize);
6428 /* to_commit_resume implementation. */
6431 remote_target::commit_resume ()
6433 int any_process_wildcard;
6434 int may_global_wildcard_vcont;
6436 /* If connected in all-stop mode, we'd send the remote resume
6437 request directly from remote_resume. Likewise if
6438 reverse-debugging, as there are no defined vCont actions for
6439 reverse execution. */
6440 if (!target_is_non_stop_p () || ::execution_direction == EXEC_REVERSE)
6443 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6444 instead of resuming all threads of each process individually.
6445 However, if any thread of a process must remain halted, we can't
6446 send wildcard resumes and must send one action per thread.
6448 Care must be taken to not resume threads/processes the server
6449 side already told us are stopped, but the core doesn't know about
6450 yet, because the events are still in the vStopped notification
6453 #1 => vCont s:p1.1;c
6455 #3 <= %Stopped T05 p1.1
6460 #8 (infrun handles the stop for p1.1 and continues stepping)
6461 #9 => vCont s:p1.1;c
6463 The last vCont above would resume thread p1.2 by mistake, because
6464 the server has no idea that the event for p1.2 had not been
6467 The server side must similarly ignore resume actions for the
6468 thread that has a pending %Stopped notification (and any other
6469 threads with events pending), until GDB acks the notification
6470 with vStopped. Otherwise, e.g., the following case is
6473 #1 => g (or any other packet)
6475 #3 <= %Stopped T05 p1.2
6476 #4 => vCont s:p1.1;c
6479 Above, the server must not resume thread p1.2. GDB can't know
6480 that p1.2 stopped until it acks the %Stopped notification, and
6481 since from GDB's perspective all threads should be running, it
6484 Finally, special care must also be given to handling fork/vfork
6485 events. A (v)fork event actually tells us that two processes
6486 stopped -- the parent and the child. Until we follow the fork,
6487 we must not resume the child. Therefore, if we have a pending
6488 fork follow, we must not send a global wildcard resume action
6489 (vCont;c). We can still send process-wide wildcards though. */
6491 /* Start by assuming a global wildcard (vCont;c) is possible. */
6492 may_global_wildcard_vcont = 1;
6494 /* And assume every process is individually wildcard-able too. */
6495 for (inferior *inf : all_non_exited_inferiors ())
6497 remote_inferior *priv = get_remote_inferior (inf);
6499 priv->may_wildcard_vcont = true;
6502 /* Check for any pending events (not reported or processed yet) and
6503 disable process and global wildcard resumes appropriately. */
6504 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont);
6506 for (thread_info *tp : all_non_exited_threads ())
6508 /* If a thread of a process is not meant to be resumed, then we
6509 can't wildcard that process. */
6512 get_remote_inferior (tp->inf)->may_wildcard_vcont = false;
6514 /* And if we can't wildcard a process, we can't wildcard
6515 everything either. */
6516 may_global_wildcard_vcont = 0;
6520 /* If a thread is the parent of an unfollowed fork, then we
6521 can't do a global wildcard, as that would resume the fork
6523 if (is_pending_fork_parent_thread (tp))
6524 may_global_wildcard_vcont = 0;
6527 /* Now let's build the vCont packet(s). Actions must be appended
6528 from narrower to wider scopes (thread -> process -> global). If
6529 we end up with too many actions for a single packet vcont_builder
6530 flushes the current vCont packet to the remote side and starts a
6532 struct vcont_builder vcont_builder (this);
6534 /* Threads first. */
6535 for (thread_info *tp : all_non_exited_threads ())
6537 remote_thread_info *remote_thr = get_remote_thread_info (tp);
6539 if (!tp->executing || remote_thr->vcont_resumed)
6542 gdb_assert (!thread_is_in_step_over_chain (tp));
6544 if (!remote_thr->last_resume_step
6545 && remote_thr->last_resume_sig == GDB_SIGNAL_0
6546 && get_remote_inferior (tp->inf)->may_wildcard_vcont)
6548 /* We'll send a wildcard resume instead. */
6549 remote_thr->vcont_resumed = 1;
6553 vcont_builder.push_action (tp->ptid,
6554 remote_thr->last_resume_step,
6555 remote_thr->last_resume_sig);
6556 remote_thr->vcont_resumed = 1;
6559 /* Now check whether we can send any process-wide wildcard. This is
6560 to avoid sending a global wildcard in the case nothing is
6561 supposed to be resumed. */
6562 any_process_wildcard = 0;
6564 for (inferior *inf : all_non_exited_inferiors ())
6566 if (get_remote_inferior (inf)->may_wildcard_vcont)
6568 any_process_wildcard = 1;
6573 if (any_process_wildcard)
6575 /* If all processes are wildcard-able, then send a single "c"
6576 action, otherwise, send an "all (-1) threads of process"
6577 continue action for each running process, if any. */
6578 if (may_global_wildcard_vcont)
6580 vcont_builder.push_action (minus_one_ptid,
6581 false, GDB_SIGNAL_0);
6585 for (inferior *inf : all_non_exited_inferiors ())
6587 if (get_remote_inferior (inf)->may_wildcard_vcont)
6589 vcont_builder.push_action (ptid_t (inf->pid),
6590 false, GDB_SIGNAL_0);
6596 vcont_builder.flush ();
6601 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6602 thread, all threads of a remote process, or all threads of all
6606 remote_target::remote_stop_ns (ptid_t ptid)
6608 struct remote_state *rs = get_remote_state ();
6609 char *p = rs->buf.data ();
6610 char *endp = p + get_remote_packet_size ();
6612 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
6613 remote_vcont_probe ();
6615 if (!rs->supports_vCont.t)
6616 error (_("Remote server does not support stopping threads"));
6618 if (ptid == minus_one_ptid
6619 || (!remote_multi_process_p (rs) && ptid.is_pid ()))
6620 p += xsnprintf (p, endp - p, "vCont;t");
6625 p += xsnprintf (p, endp - p, "vCont;t:");
6628 /* All (-1) threads of process. */
6629 nptid = ptid_t (ptid.pid (), -1, 0);
6632 /* Small optimization: if we already have a stop reply for
6633 this thread, no use in telling the stub we want this
6635 if (peek_stop_reply (ptid))
6641 write_ptid (p, endp, nptid);
6644 /* In non-stop, we get an immediate OK reply. The stop reply will
6645 come in asynchronously by notification. */
6647 getpkt (&rs->buf, 0);
6648 if (strcmp (rs->buf.data (), "OK") != 0)
6649 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid),
6653 /* All-stop version of target_interrupt. Sends a break or a ^C to
6654 interrupt the remote target. It is undefined which thread of which
6655 process reports the interrupt. */
6658 remote_target::remote_interrupt_as ()
6660 struct remote_state *rs = get_remote_state ();
6662 rs->ctrlc_pending_p = 1;
6664 /* If the inferior is stopped already, but the core didn't know
6665 about it yet, just ignore the request. The cached wait status
6666 will be collected in remote_wait. */
6667 if (rs->cached_wait_status)
6670 /* Send interrupt_sequence to remote target. */
6671 send_interrupt_sequence ();
6674 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6675 the remote target. It is undefined which thread of which process
6676 reports the interrupt. Throws an error if the packet is not
6677 supported by the server. */
6680 remote_target::remote_interrupt_ns ()
6682 struct remote_state *rs = get_remote_state ();
6683 char *p = rs->buf.data ();
6684 char *endp = p + get_remote_packet_size ();
6686 xsnprintf (p, endp - p, "vCtrlC");
6688 /* In non-stop, we get an immediate OK reply. The stop reply will
6689 come in asynchronously by notification. */
6691 getpkt (&rs->buf, 0);
6693 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC]))
6697 case PACKET_UNKNOWN:
6698 error (_("No support for interrupting the remote target."));
6700 error (_("Interrupting target failed: %s"), rs->buf.data ());
6704 /* Implement the to_stop function for the remote targets. */
6707 remote_target::stop (ptid_t ptid)
6710 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
6712 if (target_is_non_stop_p ())
6713 remote_stop_ns (ptid);
6716 /* We don't currently have a way to transparently pause the
6717 remote target in all-stop mode. Interrupt it instead. */
6718 remote_interrupt_as ();
6722 /* Implement the to_interrupt function for the remote targets. */
6725 remote_target::interrupt ()
6728 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
6730 if (target_is_non_stop_p ())
6731 remote_interrupt_ns ();
6733 remote_interrupt_as ();
6736 /* Implement the to_pass_ctrlc function for the remote targets. */
6739 remote_target::pass_ctrlc ()
6741 struct remote_state *rs = get_remote_state ();
6744 fprintf_unfiltered (gdb_stdlog, "remote_pass_ctrlc called\n");
6746 /* If we're starting up, we're not fully synced yet. Quit
6748 if (rs->starting_up)
6750 /* If ^C has already been sent once, offer to disconnect. */
6751 else if (rs->ctrlc_pending_p)
6754 target_interrupt ();
6757 /* Ask the user what to do when an interrupt is received. */
6760 remote_target::interrupt_query ()
6762 struct remote_state *rs = get_remote_state ();
6764 if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p)
6766 if (query (_("The target is not responding to interrupt requests.\n"
6767 "Stop debugging it? ")))
6769 remote_unpush_target ();
6770 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
6775 if (query (_("Interrupted while waiting for the program.\n"
6776 "Give up waiting? ")))
6781 /* Enable/disable target terminal ownership. Most targets can use
6782 terminal groups to control terminal ownership. Remote targets are
6783 different in that explicit transfer of ownership to/from GDB/target
6787 remote_target::terminal_inferior ()
6789 /* NOTE: At this point we could also register our selves as the
6790 recipient of all input. Any characters typed could then be
6791 passed on down to the target. */
6795 remote_target::terminal_ours ()
6800 remote_console_output (const char *msg)
6804 for (p = msg; p[0] && p[1]; p += 2)
6807 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
6811 fputs_unfiltered (tb, gdb_stdtarg);
6813 gdb_flush (gdb_stdtarg);
6816 DEF_VEC_O(cached_reg_t);
6818 typedef struct stop_reply
6820 struct notif_event base;
6822 /* The identifier of the thread about this event */
6825 /* The remote state this event is associated with. When the remote
6826 connection, represented by a remote_state object, is closed,
6827 all the associated stop_reply events should be released. */
6828 struct remote_state *rs;
6830 struct target_waitstatus ws;
6832 /* The architecture associated with the expedited registers. */
6835 /* Expedited registers. This makes remote debugging a bit more
6836 efficient for those targets that provide critical registers as
6837 part of their normal status mechanism (as another roundtrip to
6838 fetch them is avoided). */
6839 VEC(cached_reg_t) *regcache;
6841 enum target_stop_reason stop_reason;
6843 CORE_ADDR watch_data_address;
6849 stop_reply_xfree (struct stop_reply *r)
6851 notif_event_xfree ((struct notif_event *) r);
6854 /* Return the length of the stop reply queue. */
6857 remote_target::stop_reply_queue_length ()
6859 remote_state *rs = get_remote_state ();
6860 return rs->stop_reply_queue.size ();
6864 remote_notif_stop_parse (remote_target *remote,
6865 struct notif_client *self, const char *buf,
6866 struct notif_event *event)
6868 remote->remote_parse_stop_reply (buf, (struct stop_reply *) event);
6872 remote_notif_stop_ack (remote_target *remote,
6873 struct notif_client *self, const char *buf,
6874 struct notif_event *event)
6876 struct stop_reply *stop_reply = (struct stop_reply *) event;
6879 putpkt (remote, self->ack_command);
6881 if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE)
6883 /* We got an unknown stop reply. */
6884 error (_("Unknown stop reply"));
6887 remote->push_stop_reply (stop_reply);
6891 remote_notif_stop_can_get_pending_events (remote_target *remote,
6892 struct notif_client *self)
6894 /* We can't get pending events in remote_notif_process for
6895 notification stop, and we have to do this in remote_wait_ns
6896 instead. If we fetch all queued events from stub, remote stub
6897 may exit and we have no chance to process them back in
6899 remote_state *rs = remote->get_remote_state ();
6900 mark_async_event_handler (rs->remote_async_inferior_event_token);
6905 stop_reply_dtr (struct notif_event *event)
6907 struct stop_reply *r = (struct stop_reply *) event;
6912 VEC_iterate (cached_reg_t, r->regcache, ix, reg);
6916 VEC_free (cached_reg_t, r->regcache);
6919 static struct notif_event *
6920 remote_notif_stop_alloc_reply (void)
6922 /* We cast to a pointer to the "base class". */
6923 struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply);
6925 r->dtr = stop_reply_dtr;
6930 /* A client of notification Stop. */
6932 struct notif_client notif_client_stop =
6936 remote_notif_stop_parse,
6937 remote_notif_stop_ack,
6938 remote_notif_stop_can_get_pending_events,
6939 remote_notif_stop_alloc_reply,
6943 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6944 the pid of the process that owns the threads we want to check, or
6945 -1 if we want to check all threads. */
6948 is_pending_fork_parent (struct target_waitstatus *ws, int event_pid,
6951 if (ws->kind == TARGET_WAITKIND_FORKED
6952 || ws->kind == TARGET_WAITKIND_VFORKED)
6954 if (event_pid == -1 || event_pid == thread_ptid.pid ())
6961 /* Return the thread's pending status used to determine whether the
6962 thread is a fork parent stopped at a fork event. */
6964 static struct target_waitstatus *
6965 thread_pending_fork_status (struct thread_info *thread)
6967 if (thread->suspend.waitstatus_pending_p)
6968 return &thread->suspend.waitstatus;
6970 return &thread->pending_follow;
6973 /* Determine if THREAD is a pending fork parent thread. */
6976 is_pending_fork_parent_thread (struct thread_info *thread)
6978 struct target_waitstatus *ws = thread_pending_fork_status (thread);
6981 return is_pending_fork_parent (ws, pid, thread->ptid);
6984 /* If CONTEXT contains any fork child threads that have not been
6985 reported yet, remove them from the CONTEXT list. If such a
6986 thread exists it is because we are stopped at a fork catchpoint
6987 and have not yet called follow_fork, which will set up the
6988 host-side data structures for the new process. */
6991 remote_target::remove_new_fork_children (threads_listing_context *context)
6994 struct notif_client *notif = ¬if_client_stop;
6996 /* For any threads stopped at a fork event, remove the corresponding
6997 fork child threads from the CONTEXT list. */
6998 for (thread_info *thread : all_non_exited_threads ())
7000 struct target_waitstatus *ws = thread_pending_fork_status (thread);
7002 if (is_pending_fork_parent (ws, pid, thread->ptid))
7003 context->remove_thread (ws->value.related_pid);
7006 /* Check for any pending fork events (not reported or processed yet)
7007 in process PID and remove those fork child threads from the
7008 CONTEXT list as well. */
7009 remote_notif_get_pending_events (notif);
7010 for (auto &event : get_remote_state ()->stop_reply_queue)
7011 if (event->ws.kind == TARGET_WAITKIND_FORKED
7012 || event->ws.kind == TARGET_WAITKIND_VFORKED
7013 || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED)
7014 context->remove_thread (event->ws.value.related_pid);
7017 /* Check whether any event pending in the vStopped queue would prevent
7018 a global or process wildcard vCont action. Clear
7019 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7020 and clear the event inferior's may_wildcard_vcont flag if we can't
7021 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7024 remote_target::check_pending_events_prevent_wildcard_vcont
7025 (int *may_global_wildcard)
7027 struct notif_client *notif = ¬if_client_stop;
7029 remote_notif_get_pending_events (notif);
7030 for (auto &event : get_remote_state ()->stop_reply_queue)
7032 if (event->ws.kind == TARGET_WAITKIND_NO_RESUMED
7033 || event->ws.kind == TARGET_WAITKIND_NO_HISTORY)
7036 if (event->ws.kind == TARGET_WAITKIND_FORKED
7037 || event->ws.kind == TARGET_WAITKIND_VFORKED)
7038 *may_global_wildcard = 0;
7040 struct inferior *inf = find_inferior_ptid (event->ptid);
7042 /* This may be the first time we heard about this process.
7043 Regardless, we must not do a global wildcard resume, otherwise
7044 we'd resume this process too. */
7045 *may_global_wildcard = 0;
7047 get_remote_inferior (inf)->may_wildcard_vcont = false;
7051 /* Discard all pending stop replies of inferior INF. */
7054 remote_target::discard_pending_stop_replies (struct inferior *inf)
7056 struct stop_reply *reply;
7057 struct remote_state *rs = get_remote_state ();
7058 struct remote_notif_state *rns = rs->notif_state;
7060 /* This function can be notified when an inferior exists. When the
7061 target is not remote, the notification state is NULL. */
7062 if (rs->remote_desc == NULL)
7065 reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id];
7067 /* Discard the in-flight notification. */
7068 if (reply != NULL && reply->ptid.pid () == inf->pid)
7070 stop_reply_xfree (reply);
7071 rns->pending_event[notif_client_stop.id] = NULL;
7074 /* Discard the stop replies we have already pulled with
7076 auto iter = std::remove_if (rs->stop_reply_queue.begin (),
7077 rs->stop_reply_queue.end (),
7078 [=] (const stop_reply_up &event)
7080 return event->ptid.pid () == inf->pid;
7082 rs->stop_reply_queue.erase (iter, rs->stop_reply_queue.end ());
7085 /* Discard the stop replies for RS in stop_reply_queue. */
7088 remote_target::discard_pending_stop_replies_in_queue ()
7090 remote_state *rs = get_remote_state ();
7092 /* Discard the stop replies we have already pulled with
7094 auto iter = std::remove_if (rs->stop_reply_queue.begin (),
7095 rs->stop_reply_queue.end (),
7096 [=] (const stop_reply_up &event)
7098 return event->rs == rs;
7100 rs->stop_reply_queue.erase (iter, rs->stop_reply_queue.end ());
7103 /* Remove the first reply in 'stop_reply_queue' which matches
7107 remote_target::remote_notif_remove_queued_reply (ptid_t ptid)
7109 remote_state *rs = get_remote_state ();
7111 auto iter = std::find_if (rs->stop_reply_queue.begin (),
7112 rs->stop_reply_queue.end (),
7113 [=] (const stop_reply_up &event)
7115 return event->ptid.matches (ptid);
7117 struct stop_reply *result;
7118 if (iter == rs->stop_reply_queue.end ())
7122 result = iter->release ();
7123 rs->stop_reply_queue.erase (iter);
7127 fprintf_unfiltered (gdb_stdlog,
7128 "notif: discard queued event: 'Stop' in %s\n",
7129 target_pid_to_str (ptid));
7134 /* Look for a queued stop reply belonging to PTID. If one is found,
7135 remove it from the queue, and return it. Returns NULL if none is
7136 found. If there are still queued events left to process, tell the
7137 event loop to get back to target_wait soon. */
7140 remote_target::queued_stop_reply (ptid_t ptid)
7142 remote_state *rs = get_remote_state ();
7143 struct stop_reply *r = remote_notif_remove_queued_reply (ptid);
7145 if (!rs->stop_reply_queue.empty ())
7147 /* There's still at least an event left. */
7148 mark_async_event_handler (rs->remote_async_inferior_event_token);
7154 /* Push a fully parsed stop reply in the stop reply queue. Since we
7155 know that we now have at least one queued event left to pass to the
7156 core side, tell the event loop to get back to target_wait soon. */
7159 remote_target::push_stop_reply (struct stop_reply *new_event)
7161 remote_state *rs = get_remote_state ();
7162 rs->stop_reply_queue.push_back (stop_reply_up (new_event));
7165 fprintf_unfiltered (gdb_stdlog,
7166 "notif: push 'Stop' %s to queue %d\n",
7167 target_pid_to_str (new_event->ptid),
7168 int (rs->stop_reply_queue.size ()));
7170 mark_async_event_handler (rs->remote_async_inferior_event_token);
7173 /* Returns true if we have a stop reply for PTID. */
7176 remote_target::peek_stop_reply (ptid_t ptid)
7178 remote_state *rs = get_remote_state ();
7179 for (auto &event : rs->stop_reply_queue)
7180 if (ptid == event->ptid
7181 && event->ws.kind == TARGET_WAITKIND_STOPPED)
7186 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7187 starting with P and ending with PEND matches PREFIX. */
7190 strprefix (const char *p, const char *pend, const char *prefix)
7192 for ( ; p < pend; p++, prefix++)
7195 return *prefix == '\0';
7198 /* Parse the stop reply in BUF. Either the function succeeds, and the
7199 result is stored in EVENT, or throws an error. */
7202 remote_target::remote_parse_stop_reply (const char *buf, stop_reply *event)
7204 remote_arch_state *rsa = NULL;
7209 event->ptid = null_ptid;
7210 event->rs = get_remote_state ();
7211 event->ws.kind = TARGET_WAITKIND_IGNORE;
7212 event->ws.value.integer = 0;
7213 event->stop_reason = TARGET_STOPPED_BY_NO_REASON;
7214 event->regcache = NULL;
7219 case 'T': /* Status with PC, SP, FP, ... */
7220 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7221 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7223 n... = register number
7224 r... = register contents
7227 p = &buf[3]; /* after Txx */
7233 p1 = strchr (p, ':');
7235 error (_("Malformed packet(a) (missing colon): %s\n\
7239 error (_("Malformed packet(a) (missing register number): %s\n\
7243 /* Some "registers" are actually extended stop information.
7244 Note if you're adding a new entry here: GDB 7.9 and
7245 earlier assume that all register "numbers" that start
7246 with an hex digit are real register numbers. Make sure
7247 the server only sends such a packet if it knows the
7248 client understands it. */
7250 if (strprefix (p, p1, "thread"))
7251 event->ptid = read_ptid (++p1, &p);
7252 else if (strprefix (p, p1, "syscall_entry"))
7256 event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY;
7257 p = unpack_varlen_hex (++p1, &sysno);
7258 event->ws.value.syscall_number = (int) sysno;
7260 else if (strprefix (p, p1, "syscall_return"))
7264 event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN;
7265 p = unpack_varlen_hex (++p1, &sysno);
7266 event->ws.value.syscall_number = (int) sysno;
7268 else if (strprefix (p, p1, "watch")
7269 || strprefix (p, p1, "rwatch")
7270 || strprefix (p, p1, "awatch"))
7272 event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
7273 p = unpack_varlen_hex (++p1, &addr);
7274 event->watch_data_address = (CORE_ADDR) addr;
7276 else if (strprefix (p, p1, "swbreak"))
7278 event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
7280 /* Make sure the stub doesn't forget to indicate support
7282 if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE)
7283 error (_("Unexpected swbreak stop reason"));
7285 /* The value part is documented as "must be empty",
7286 though we ignore it, in case we ever decide to make
7287 use of it in a backward compatible way. */
7288 p = strchrnul (p1 + 1, ';');
7290 else if (strprefix (p, p1, "hwbreak"))
7292 event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT;
7294 /* Make sure the stub doesn't forget to indicate support
7296 if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE)
7297 error (_("Unexpected hwbreak stop reason"));
7300 p = strchrnul (p1 + 1, ';');
7302 else if (strprefix (p, p1, "library"))
7304 event->ws.kind = TARGET_WAITKIND_LOADED;
7305 p = strchrnul (p1 + 1, ';');
7307 else if (strprefix (p, p1, "replaylog"))
7309 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
7310 /* p1 will indicate "begin" or "end", but it makes
7311 no difference for now, so ignore it. */
7312 p = strchrnul (p1 + 1, ';');
7314 else if (strprefix (p, p1, "core"))
7318 p = unpack_varlen_hex (++p1, &c);
7321 else if (strprefix (p, p1, "fork"))
7323 event->ws.value.related_pid = read_ptid (++p1, &p);
7324 event->ws.kind = TARGET_WAITKIND_FORKED;
7326 else if (strprefix (p, p1, "vfork"))
7328 event->ws.value.related_pid = read_ptid (++p1, &p);
7329 event->ws.kind = TARGET_WAITKIND_VFORKED;
7331 else if (strprefix (p, p1, "vforkdone"))
7333 event->ws.kind = TARGET_WAITKIND_VFORK_DONE;
7334 p = strchrnul (p1 + 1, ';');
7336 else if (strprefix (p, p1, "exec"))
7341 /* Determine the length of the execd pathname. */
7342 p = unpack_varlen_hex (++p1, &ignored);
7343 pathlen = (p - p1) / 2;
7345 /* Save the pathname for event reporting and for
7346 the next run command. */
7347 char *pathname = (char *) xmalloc (pathlen + 1);
7348 struct cleanup *old_chain = make_cleanup (xfree, pathname);
7349 hex2bin (p1, (gdb_byte *) pathname, pathlen);
7350 pathname[pathlen] = '\0';
7351 discard_cleanups (old_chain);
7353 /* This is freed during event handling. */
7354 event->ws.value.execd_pathname = pathname;
7355 event->ws.kind = TARGET_WAITKIND_EXECD;
7357 /* Skip the registers included in this packet, since
7358 they may be for an architecture different from the
7359 one used by the original program. */
7362 else if (strprefix (p, p1, "create"))
7364 event->ws.kind = TARGET_WAITKIND_THREAD_CREATED;
7365 p = strchrnul (p1 + 1, ';');
7374 p = strchrnul (p1 + 1, ';');
7379 /* Maybe a real ``P'' register number. */
7380 p_temp = unpack_varlen_hex (p, &pnum);
7381 /* If the first invalid character is the colon, we got a
7382 register number. Otherwise, it's an unknown stop
7386 /* If we haven't parsed the event's thread yet, find
7387 it now, in order to find the architecture of the
7388 reported expedited registers. */
7389 if (event->ptid == null_ptid)
7391 const char *thr = strstr (p1 + 1, ";thread:");
7393 event->ptid = read_ptid (thr + strlen (";thread:"),
7397 /* Either the current thread hasn't changed,
7398 or the inferior is not multi-threaded.
7399 The event must be for the thread we last
7400 set as (or learned as being) current. */
7401 event->ptid = event->rs->general_thread;
7407 inferior *inf = (event->ptid == null_ptid
7409 : find_inferior_ptid (event->ptid));
7410 /* If this is the first time we learn anything
7411 about this process, skip the registers
7412 included in this packet, since we don't yet
7413 know which architecture to use to parse them.
7414 We'll determine the architecture later when
7415 we process the stop reply and retrieve the
7416 target description, via
7417 remote_notice_new_inferior ->
7418 post_create_inferior. */
7421 p = strchrnul (p1 + 1, ';');
7426 event->arch = inf->gdbarch;
7427 rsa = event->rs->get_remote_arch_state (event->arch);
7431 = packet_reg_from_pnum (event->arch, rsa, pnum);
7432 cached_reg_t cached_reg;
7435 error (_("Remote sent bad register number %s: %s\n\
7437 hex_string (pnum), p, buf);
7439 cached_reg.num = reg->regnum;
7440 cached_reg.data = (gdb_byte *)
7441 xmalloc (register_size (event->arch, reg->regnum));
7444 fieldsize = hex2bin (p, cached_reg.data,
7445 register_size (event->arch, reg->regnum));
7447 if (fieldsize < register_size (event->arch, reg->regnum))
7448 warning (_("Remote reply is too short: %s"), buf);
7450 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
7454 /* Not a number. Silently skip unknown optional
7456 p = strchrnul (p1 + 1, ';');
7461 error (_("Remote register badly formatted: %s\nhere: %s"),
7466 if (event->ws.kind != TARGET_WAITKIND_IGNORE)
7470 case 'S': /* Old style status, just signal only. */
7474 event->ws.kind = TARGET_WAITKIND_STOPPED;
7475 sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
7476 if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST)
7477 event->ws.value.sig = (enum gdb_signal) sig;
7479 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
7482 case 'w': /* Thread exited. */
7486 event->ws.kind = TARGET_WAITKIND_THREAD_EXITED;
7487 p = unpack_varlen_hex (&buf[1], &value);
7488 event->ws.value.integer = value;
7490 error (_("stop reply packet badly formatted: %s"), buf);
7491 event->ptid = read_ptid (++p, NULL);
7494 case 'W': /* Target exited. */
7500 /* GDB used to accept only 2 hex chars here. Stubs should
7501 only send more if they detect GDB supports multi-process
7503 p = unpack_varlen_hex (&buf[1], &value);
7507 /* The remote process exited. */
7508 event->ws.kind = TARGET_WAITKIND_EXITED;
7509 event->ws.value.integer = value;
7513 /* The remote process exited with a signal. */
7514 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
7515 if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST)
7516 event->ws.value.sig = (enum gdb_signal) value;
7518 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
7521 /* If no process is specified, assume inferior_ptid. */
7522 pid = inferior_ptid.pid ();
7531 else if (startswith (p, "process:"))
7535 p += sizeof ("process:") - 1;
7536 unpack_varlen_hex (p, &upid);
7540 error (_("unknown stop reply packet: %s"), buf);
7543 error (_("unknown stop reply packet: %s"), buf);
7544 event->ptid = ptid_t (pid);
7548 event->ws.kind = TARGET_WAITKIND_NO_RESUMED;
7549 event->ptid = minus_one_ptid;
7553 if (target_is_non_stop_p () && event->ptid == null_ptid)
7554 error (_("No process or thread specified in stop reply: %s"), buf);
7557 /* When the stub wants to tell GDB about a new notification reply, it
7558 sends a notification (%Stop, for example). Those can come it at
7559 any time, hence, we have to make sure that any pending
7560 putpkt/getpkt sequence we're making is finished, before querying
7561 the stub for more events with the corresponding ack command
7562 (vStopped, for example). E.g., if we started a vStopped sequence
7563 immediately upon receiving the notification, something like this
7571 1.6) <-- (registers reply to step #1.3)
7573 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7576 To solve this, whenever we parse a %Stop notification successfully,
7577 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7578 doing whatever we were doing:
7584 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7585 2.5) <-- (registers reply to step #2.3)
7587 Eventualy after step #2.5, we return to the event loop, which
7588 notices there's an event on the
7589 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7590 associated callback --- the function below. At this point, we're
7591 always safe to start a vStopped sequence. :
7594 2.7) <-- T05 thread:2
7600 remote_target::remote_notif_get_pending_events (notif_client *nc)
7602 struct remote_state *rs = get_remote_state ();
7604 if (rs->notif_state->pending_event[nc->id] != NULL)
7607 fprintf_unfiltered (gdb_stdlog,
7608 "notif: process: '%s' ack pending event\n",
7612 nc->ack (this, nc, rs->buf.data (),
7613 rs->notif_state->pending_event[nc->id]);
7614 rs->notif_state->pending_event[nc->id] = NULL;
7618 getpkt (&rs->buf, 0);
7619 if (strcmp (rs->buf.data (), "OK") == 0)
7622 remote_notif_ack (this, nc, rs->buf.data ());
7628 fprintf_unfiltered (gdb_stdlog,
7629 "notif: process: '%s' no pending reply\n",
7634 /* Wrapper around remote_target::remote_notif_get_pending_events to
7635 avoid having to export the whole remote_target class. */
7638 remote_notif_get_pending_events (remote_target *remote, notif_client *nc)
7640 remote->remote_notif_get_pending_events (nc);
7643 /* Called when it is decided that STOP_REPLY holds the info of the
7644 event that is to be returned to the core. This function always
7645 destroys STOP_REPLY. */
7648 remote_target::process_stop_reply (struct stop_reply *stop_reply,
7649 struct target_waitstatus *status)
7653 *status = stop_reply->ws;
7654 ptid = stop_reply->ptid;
7656 /* If no thread/process was reported by the stub, assume the current
7658 if (ptid == null_ptid)
7659 ptid = inferior_ptid;
7661 if (status->kind != TARGET_WAITKIND_EXITED
7662 && status->kind != TARGET_WAITKIND_SIGNALLED
7663 && status->kind != TARGET_WAITKIND_NO_RESUMED)
7665 /* Expedited registers. */
7666 if (stop_reply->regcache)
7668 struct regcache *regcache
7669 = get_thread_arch_regcache (ptid, stop_reply->arch);
7674 VEC_iterate (cached_reg_t, stop_reply->regcache, ix, reg);
7677 regcache->raw_supply (reg->num, reg->data);
7681 VEC_free (cached_reg_t, stop_reply->regcache);
7684 remote_notice_new_inferior (ptid, 0);
7685 remote_thread_info *remote_thr = get_remote_thread_info (ptid);
7686 remote_thr->core = stop_reply->core;
7687 remote_thr->stop_reason = stop_reply->stop_reason;
7688 remote_thr->watch_data_address = stop_reply->watch_data_address;
7689 remote_thr->vcont_resumed = 0;
7692 stop_reply_xfree (stop_reply);
7696 /* The non-stop mode version of target_wait. */
7699 remote_target::wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
7701 struct remote_state *rs = get_remote_state ();
7702 struct stop_reply *stop_reply;
7706 /* If in non-stop mode, get out of getpkt even if a
7707 notification is received. */
7709 ret = getpkt_or_notif_sane (&rs->buf, 0 /* forever */, &is_notif);
7712 if (ret != -1 && !is_notif)
7715 case 'E': /* Error of some sort. */
7716 /* We're out of sync with the target now. Did it continue
7717 or not? We can't tell which thread it was in non-stop,
7718 so just ignore this. */
7719 warning (_("Remote failure reply: %s"), rs->buf.data ());
7721 case 'O': /* Console output. */
7722 remote_console_output (&rs->buf[1]);
7725 warning (_("Invalid remote reply: %s"), rs->buf.data ());
7729 /* Acknowledge a pending stop reply that may have arrived in the
7731 if (rs->notif_state->pending_event[notif_client_stop.id] != NULL)
7732 remote_notif_get_pending_events (¬if_client_stop);
7734 /* If indeed we noticed a stop reply, we're done. */
7735 stop_reply = queued_stop_reply (ptid);
7736 if (stop_reply != NULL)
7737 return process_stop_reply (stop_reply, status);
7739 /* Still no event. If we're just polling for an event, then
7740 return to the event loop. */
7741 if (options & TARGET_WNOHANG)
7743 status->kind = TARGET_WAITKIND_IGNORE;
7744 return minus_one_ptid;
7747 /* Otherwise do a blocking wait. */
7748 ret = getpkt_or_notif_sane (&rs->buf, 1 /* forever */, &is_notif);
7752 /* Wait until the remote machine stops, then return, storing status in
7753 STATUS just as `wait' would. */
7756 remote_target::wait_as (ptid_t ptid, target_waitstatus *status, int options)
7758 struct remote_state *rs = get_remote_state ();
7759 ptid_t event_ptid = null_ptid;
7761 struct stop_reply *stop_reply;
7765 status->kind = TARGET_WAITKIND_IGNORE;
7766 status->value.integer = 0;
7768 stop_reply = queued_stop_reply (ptid);
7769 if (stop_reply != NULL)
7770 return process_stop_reply (stop_reply, status);
7772 if (rs->cached_wait_status)
7773 /* Use the cached wait status, but only once. */
7774 rs->cached_wait_status = 0;
7779 int forever = ((options & TARGET_WNOHANG) == 0
7780 && rs->wait_forever_enabled_p);
7782 if (!rs->waiting_for_stop_reply)
7784 status->kind = TARGET_WAITKIND_NO_RESUMED;
7785 return minus_one_ptid;
7788 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7789 _never_ wait for ever -> test on target_is_async_p().
7790 However, before we do that we need to ensure that the caller
7791 knows how to take the target into/out of async mode. */
7792 ret = getpkt_or_notif_sane (&rs->buf, forever, &is_notif);
7794 /* GDB gets a notification. Return to core as this event is
7796 if (ret != -1 && is_notif)
7797 return minus_one_ptid;
7799 if (ret == -1 && (options & TARGET_WNOHANG) != 0)
7800 return minus_one_ptid;
7803 buf = rs->buf.data ();
7805 /* Assume that the target has acknowledged Ctrl-C unless we receive
7806 an 'F' or 'O' packet. */
7807 if (buf[0] != 'F' && buf[0] != 'O')
7808 rs->ctrlc_pending_p = 0;
7812 case 'E': /* Error of some sort. */
7813 /* We're out of sync with the target now. Did it continue or
7814 not? Not is more likely, so report a stop. */
7815 rs->waiting_for_stop_reply = 0;
7817 warning (_("Remote failure reply: %s"), buf);
7818 status->kind = TARGET_WAITKIND_STOPPED;
7819 status->value.sig = GDB_SIGNAL_0;
7821 case 'F': /* File-I/O request. */
7822 /* GDB may access the inferior memory while handling the File-I/O
7823 request, but we don't want GDB accessing memory while waiting
7824 for a stop reply. See the comments in putpkt_binary. Set
7825 waiting_for_stop_reply to 0 temporarily. */
7826 rs->waiting_for_stop_reply = 0;
7827 remote_fileio_request (this, buf, rs->ctrlc_pending_p);
7828 rs->ctrlc_pending_p = 0;
7829 /* GDB handled the File-I/O request, and the target is running
7830 again. Keep waiting for events. */
7831 rs->waiting_for_stop_reply = 1;
7833 case 'N': case 'T': case 'S': case 'X': case 'W':
7835 /* There is a stop reply to handle. */
7836 rs->waiting_for_stop_reply = 0;
7839 = (struct stop_reply *) remote_notif_parse (this,
7843 event_ptid = process_stop_reply (stop_reply, status);
7846 case 'O': /* Console output. */
7847 remote_console_output (buf + 1);
7850 if (rs->last_sent_signal != GDB_SIGNAL_0)
7852 /* Zero length reply means that we tried 'S' or 'C' and the
7853 remote system doesn't support it. */
7854 target_terminal::ours_for_output ();
7856 ("Can't send signals to this remote system. %s not sent.\n",
7857 gdb_signal_to_name (rs->last_sent_signal));
7858 rs->last_sent_signal = GDB_SIGNAL_0;
7859 target_terminal::inferior ();
7861 strcpy (buf, rs->last_sent_step ? "s" : "c");
7867 warning (_("Invalid remote reply: %s"), buf);
7871 if (status->kind == TARGET_WAITKIND_NO_RESUMED)
7872 return minus_one_ptid;
7873 else if (status->kind == TARGET_WAITKIND_IGNORE)
7875 /* Nothing interesting happened. If we're doing a non-blocking
7876 poll, we're done. Otherwise, go back to waiting. */
7877 if (options & TARGET_WNOHANG)
7878 return minus_one_ptid;
7882 else if (status->kind != TARGET_WAITKIND_EXITED
7883 && status->kind != TARGET_WAITKIND_SIGNALLED)
7885 if (event_ptid != null_ptid)
7886 record_currthread (rs, event_ptid);
7888 event_ptid = inferior_ptid;
7891 /* A process exit. Invalidate our notion of current thread. */
7892 record_currthread (rs, minus_one_ptid);
7897 /* Wait until the remote machine stops, then return, storing status in
7898 STATUS just as `wait' would. */
7901 remote_target::wait (ptid_t ptid, struct target_waitstatus *status, int options)
7905 if (target_is_non_stop_p ())
7906 event_ptid = wait_ns (ptid, status, options);
7908 event_ptid = wait_as (ptid, status, options);
7910 if (target_is_async_p ())
7912 remote_state *rs = get_remote_state ();
7914 /* If there are are events left in the queue tell the event loop
7916 if (!rs->stop_reply_queue.empty ())
7917 mark_async_event_handler (rs->remote_async_inferior_event_token);
7923 /* Fetch a single register using a 'p' packet. */
7926 remote_target::fetch_register_using_p (struct regcache *regcache,
7929 struct gdbarch *gdbarch = regcache->arch ();
7930 struct remote_state *rs = get_remote_state ();
7932 gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum));
7935 if (packet_support (PACKET_p) == PACKET_DISABLE)
7938 if (reg->pnum == -1)
7941 p = rs->buf.data ();
7943 p += hexnumstr (p, reg->pnum);
7946 getpkt (&rs->buf, 0);
7948 buf = rs->buf.data ();
7950 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_p]))
7954 case PACKET_UNKNOWN:
7957 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7958 gdbarch_register_name (regcache->arch (),
7963 /* If this register is unfetchable, tell the regcache. */
7966 regcache->raw_supply (reg->regnum, NULL);
7970 /* Otherwise, parse and supply the value. */
7976 error (_("fetch_register_using_p: early buf termination"));
7978 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
7981 regcache->raw_supply (reg->regnum, regp);
7985 /* Fetch the registers included in the target's 'g' packet. */
7988 remote_target::send_g_packet ()
7990 struct remote_state *rs = get_remote_state ();
7993 xsnprintf (rs->buf.data (), get_remote_packet_size (), "g");
7995 getpkt (&rs->buf, 0);
7996 if (packet_check_result (rs->buf) == PACKET_ERROR)
7997 error (_("Could not read registers; remote failure reply '%s'"),
8000 /* We can get out of synch in various cases. If the first character
8001 in the buffer is not a hex character, assume that has happened
8002 and try to fetch another packet to read. */
8003 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
8004 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
8005 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
8006 && rs->buf[0] != 'x') /* New: unavailable register value. */
8009 fprintf_unfiltered (gdb_stdlog,
8010 "Bad register packet; fetching a new packet\n");
8011 getpkt (&rs->buf, 0);
8014 buf_len = strlen (rs->buf.data ());
8016 /* Sanity check the received packet. */
8017 if (buf_len % 2 != 0)
8018 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf.data ());
8024 remote_target::process_g_packet (struct regcache *regcache)
8026 struct gdbarch *gdbarch = regcache->arch ();
8027 struct remote_state *rs = get_remote_state ();
8028 remote_arch_state *rsa = rs->get_remote_arch_state (gdbarch);
8033 buf_len = strlen (rs->buf.data ());
8035 /* Further sanity checks, with knowledge of the architecture. */
8036 if (buf_len > 2 * rsa->sizeof_g_packet)
8037 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8039 rsa->sizeof_g_packet, buf_len / 2,
8042 /* Save the size of the packet sent to us by the target. It is used
8043 as a heuristic when determining the max size of packets that the
8044 target can safely receive. */
8045 if (rsa->actual_register_packet_size == 0)
8046 rsa->actual_register_packet_size = buf_len;
8048 /* If this is smaller than we guessed the 'g' packet would be,
8049 update our records. A 'g' reply that doesn't include a register's
8050 value implies either that the register is not available, or that
8051 the 'p' packet must be used. */
8052 if (buf_len < 2 * rsa->sizeof_g_packet)
8054 long sizeof_g_packet = buf_len / 2;
8056 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8058 long offset = rsa->regs[i].offset;
8059 long reg_size = register_size (gdbarch, i);
8061 if (rsa->regs[i].pnum == -1)
8064 if (offset >= sizeof_g_packet)
8065 rsa->regs[i].in_g_packet = 0;
8066 else if (offset + reg_size > sizeof_g_packet)
8067 error (_("Truncated register %d in remote 'g' packet"), i);
8069 rsa->regs[i].in_g_packet = 1;
8072 /* Looks valid enough, we can assume this is the correct length
8073 for a 'g' packet. It's important not to adjust
8074 rsa->sizeof_g_packet if we have truncated registers otherwise
8075 this "if" won't be run the next time the method is called
8076 with a packet of the same size and one of the internal errors
8077 below will trigger instead. */
8078 rsa->sizeof_g_packet = sizeof_g_packet;
8081 regs = (char *) alloca (rsa->sizeof_g_packet);
8083 /* Unimplemented registers read as all bits zero. */
8084 memset (regs, 0, rsa->sizeof_g_packet);
8086 /* Reply describes registers byte by byte, each byte encoded as two
8087 hex characters. Suck them all up, then supply them to the
8088 register cacheing/storage mechanism. */
8090 p = rs->buf.data ();
8091 for (i = 0; i < rsa->sizeof_g_packet; i++)
8093 if (p[0] == 0 || p[1] == 0)
8094 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8095 internal_error (__FILE__, __LINE__,
8096 _("unexpected end of 'g' packet reply"));
8098 if (p[0] == 'x' && p[1] == 'x')
8099 regs[i] = 0; /* 'x' */
8101 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
8105 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8107 struct packet_reg *r = &rsa->regs[i];
8108 long reg_size = register_size (gdbarch, i);
8112 if ((r->offset + reg_size) * 2 > strlen (rs->buf.data ()))
8113 /* This shouldn't happen - we adjusted in_g_packet above. */
8114 internal_error (__FILE__, __LINE__,
8115 _("unexpected end of 'g' packet reply"));
8116 else if (rs->buf[r->offset * 2] == 'x')
8118 gdb_assert (r->offset * 2 < strlen (rs->buf.data ()));
8119 /* The register isn't available, mark it as such (at
8120 the same time setting the value to zero). */
8121 regcache->raw_supply (r->regnum, NULL);
8124 regcache->raw_supply (r->regnum, regs + r->offset);
8130 remote_target::fetch_registers_using_g (struct regcache *regcache)
8133 process_g_packet (regcache);
8136 /* Make the remote selected traceframe match GDB's selected
8140 remote_target::set_remote_traceframe ()
8143 struct remote_state *rs = get_remote_state ();
8145 if (rs->remote_traceframe_number == get_traceframe_number ())
8148 /* Avoid recursion, remote_trace_find calls us again. */
8149 rs->remote_traceframe_number = get_traceframe_number ();
8151 newnum = target_trace_find (tfind_number,
8152 get_traceframe_number (), 0, 0, NULL);
8154 /* Should not happen. If it does, all bets are off. */
8155 if (newnum != get_traceframe_number ())
8156 warning (_("could not set remote traceframe"));
8160 remote_target::fetch_registers (struct regcache *regcache, int regnum)
8162 struct gdbarch *gdbarch = regcache->arch ();
8163 struct remote_state *rs = get_remote_state ();
8164 remote_arch_state *rsa = rs->get_remote_arch_state (gdbarch);
8167 set_remote_traceframe ();
8168 set_general_thread (regcache->ptid ());
8172 packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum);
8174 gdb_assert (reg != NULL);
8176 /* If this register might be in the 'g' packet, try that first -
8177 we are likely to read more than one register. If this is the
8178 first 'g' packet, we might be overly optimistic about its
8179 contents, so fall back to 'p'. */
8180 if (reg->in_g_packet)
8182 fetch_registers_using_g (regcache);
8183 if (reg->in_g_packet)
8187 if (fetch_register_using_p (regcache, reg))
8190 /* This register is not available. */
8191 regcache->raw_supply (reg->regnum, NULL);
8196 fetch_registers_using_g (regcache);
8198 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8199 if (!rsa->regs[i].in_g_packet)
8200 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
8202 /* This register is not available. */
8203 regcache->raw_supply (i, NULL);
8207 /* Prepare to store registers. Since we may send them all (using a
8208 'G' request), we have to read out the ones we don't want to change
8212 remote_target::prepare_to_store (struct regcache *regcache)
8214 struct remote_state *rs = get_remote_state ();
8215 remote_arch_state *rsa = rs->get_remote_arch_state (regcache->arch ());
8218 /* Make sure the entire registers array is valid. */
8219 switch (packet_support (PACKET_P))
8221 case PACKET_DISABLE:
8222 case PACKET_SUPPORT_UNKNOWN:
8223 /* Make sure all the necessary registers are cached. */
8224 for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++)
8225 if (rsa->regs[i].in_g_packet)
8226 regcache->raw_update (rsa->regs[i].regnum);
8233 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8234 packet was not recognized. */
8237 remote_target::store_register_using_P (const struct regcache *regcache,
8240 struct gdbarch *gdbarch = regcache->arch ();
8241 struct remote_state *rs = get_remote_state ();
8242 /* Try storing a single register. */
8243 char *buf = rs->buf.data ();
8244 gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum));
8247 if (packet_support (PACKET_P) == PACKET_DISABLE)
8250 if (reg->pnum == -1)
8253 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
8254 p = buf + strlen (buf);
8255 regcache->raw_collect (reg->regnum, regp);
8256 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
8258 getpkt (&rs->buf, 0);
8260 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
8265 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8266 gdbarch_register_name (gdbarch, reg->regnum), rs->buf.data ());
8267 case PACKET_UNKNOWN:
8270 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
8274 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8275 contents of the register cache buffer. FIXME: ignores errors. */
8278 remote_target::store_registers_using_G (const struct regcache *regcache)
8280 struct remote_state *rs = get_remote_state ();
8281 remote_arch_state *rsa = rs->get_remote_arch_state (regcache->arch ());
8285 /* Extract all the registers in the regcache copying them into a
8290 regs = (gdb_byte *) alloca (rsa->sizeof_g_packet);
8291 memset (regs, 0, rsa->sizeof_g_packet);
8292 for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++)
8294 struct packet_reg *r = &rsa->regs[i];
8297 regcache->raw_collect (r->regnum, regs + r->offset);
8301 /* Command describes registers byte by byte,
8302 each byte encoded as two hex characters. */
8303 p = rs->buf.data ();
8305 bin2hex (regs, p, rsa->sizeof_g_packet);
8307 getpkt (&rs->buf, 0);
8308 if (packet_check_result (rs->buf) == PACKET_ERROR)
8309 error (_("Could not write registers; remote failure reply '%s'"),
8313 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8314 of the register cache buffer. FIXME: ignores errors. */
8317 remote_target::store_registers (struct regcache *regcache, int regnum)
8319 struct gdbarch *gdbarch = regcache->arch ();
8320 struct remote_state *rs = get_remote_state ();
8321 remote_arch_state *rsa = rs->get_remote_arch_state (gdbarch);
8324 set_remote_traceframe ();
8325 set_general_thread (regcache->ptid ());
8329 packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum);
8331 gdb_assert (reg != NULL);
8333 /* Always prefer to store registers using the 'P' packet if
8334 possible; we often change only a small number of registers.
8335 Sometimes we change a larger number; we'd need help from a
8336 higher layer to know to use 'G'. */
8337 if (store_register_using_P (regcache, reg))
8340 /* For now, don't complain if we have no way to write the
8341 register. GDB loses track of unavailable registers too
8342 easily. Some day, this may be an error. We don't have
8343 any way to read the register, either... */
8344 if (!reg->in_g_packet)
8347 store_registers_using_G (regcache);
8351 store_registers_using_G (regcache);
8353 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8354 if (!rsa->regs[i].in_g_packet)
8355 if (!store_register_using_P (regcache, &rsa->regs[i]))
8356 /* See above for why we do not issue an error here. */
8361 /* Return the number of hex digits in num. */
8364 hexnumlen (ULONGEST num)
8368 for (i = 0; num != 0; i++)
8371 return std::max (i, 1);
8374 /* Set BUF to the minimum number of hex digits representing NUM. */
8377 hexnumstr (char *buf, ULONGEST num)
8379 int len = hexnumlen (num);
8381 return hexnumnstr (buf, num, len);
8385 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8388 hexnumnstr (char *buf, ULONGEST num, int width)
8394 for (i = width - 1; i >= 0; i--)
8396 buf[i] = "0123456789abcdef"[(num & 0xf)];
8403 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8406 remote_address_masked (CORE_ADDR addr)
8408 unsigned int address_size = remote_address_size;
8410 /* If "remoteaddresssize" was not set, default to target address size. */
8412 address_size = gdbarch_addr_bit (target_gdbarch ());
8414 if (address_size > 0
8415 && address_size < (sizeof (ULONGEST) * 8))
8417 /* Only create a mask when that mask can safely be constructed
8418 in a ULONGEST variable. */
8421 mask = (mask << address_size) - 1;
8427 /* Determine whether the remote target supports binary downloading.
8428 This is accomplished by sending a no-op memory write of zero length
8429 to the target at the specified address. It does not suffice to send
8430 the whole packet, since many stubs strip the eighth bit and
8431 subsequently compute a wrong checksum, which causes real havoc with
8434 NOTE: This can still lose if the serial line is not eight-bit
8435 clean. In cases like this, the user should clear "remote
8439 remote_target::check_binary_download (CORE_ADDR addr)
8441 struct remote_state *rs = get_remote_state ();
8443 switch (packet_support (PACKET_X))
8445 case PACKET_DISABLE:
8449 case PACKET_SUPPORT_UNKNOWN:
8453 p = rs->buf.data ();
8455 p += hexnumstr (p, (ULONGEST) addr);
8457 p += hexnumstr (p, (ULONGEST) 0);
8461 putpkt_binary (rs->buf.data (), (int) (p - rs->buf.data ()));
8462 getpkt (&rs->buf, 0);
8464 if (rs->buf[0] == '\0')
8467 fprintf_unfiltered (gdb_stdlog,
8468 "binary downloading NOT "
8469 "supported by target\n");
8470 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
8475 fprintf_unfiltered (gdb_stdlog,
8476 "binary downloading supported by target\n");
8477 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
8484 /* Helper function to resize the payload in order to try to get a good
8485 alignment. We try to write an amount of data such that the next write will
8486 start on an address aligned on REMOTE_ALIGN_WRITES. */
8489 align_for_efficient_write (int todo, CORE_ADDR memaddr)
8491 return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
8494 /* Write memory data directly to the remote machine.
8495 This does not inform the data cache; the data cache uses this.
8496 HEADER is the starting part of the packet.
8497 MEMADDR is the address in the remote memory space.
8498 MYADDR is the address of the buffer in our space.
8499 LEN_UNITS is the number of addressable units to write.
8500 UNIT_SIZE is the length in bytes of an addressable unit.
8501 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8502 should send data as binary ('X'), or hex-encoded ('M').
8504 The function creates packet of the form
8505 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8507 where encoding of <DATA> is terminated by PACKET_FORMAT.
8509 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8512 Return the transferred status, error or OK (an
8513 'enum target_xfer_status' value). Save the number of addressable units
8514 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8516 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8517 exchange between gdb and the stub could look like (?? in place of the
8523 -> $M1000,3:eeeeffffeeee#??
8527 <- eeeeffffeeeedddd */
8530 remote_target::remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
8531 const gdb_byte *myaddr,
8534 ULONGEST *xfered_len_units,
8535 char packet_format, int use_length)
8537 struct remote_state *rs = get_remote_state ();
8543 int payload_capacity_bytes;
8544 int payload_length_bytes;
8546 if (packet_format != 'X' && packet_format != 'M')
8547 internal_error (__FILE__, __LINE__,
8548 _("remote_write_bytes_aux: bad packet format"));
8551 return TARGET_XFER_EOF;
8553 payload_capacity_bytes = get_memory_write_packet_size ();
8555 /* The packet buffer will be large enough for the payload;
8556 get_memory_packet_size ensures this. */
8559 /* Compute the size of the actual payload by subtracting out the
8560 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8562 payload_capacity_bytes -= strlen ("$,:#NN");
8564 /* The comma won't be used. */
8565 payload_capacity_bytes += 1;
8566 payload_capacity_bytes -= strlen (header);
8567 payload_capacity_bytes -= hexnumlen (memaddr);
8569 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8571 strcat (rs->buf.data (), header);
8572 p = rs->buf.data () + strlen (header);
8574 /* Compute a best guess of the number of bytes actually transfered. */
8575 if (packet_format == 'X')
8577 /* Best guess at number of bytes that will fit. */
8578 todo_units = std::min (len_units,
8579 (ULONGEST) payload_capacity_bytes / unit_size);
8581 payload_capacity_bytes -= hexnumlen (todo_units);
8582 todo_units = std::min (todo_units, payload_capacity_bytes / unit_size);
8586 /* Number of bytes that will fit. */
8588 = std::min (len_units,
8589 (ULONGEST) (payload_capacity_bytes / unit_size) / 2);
8591 payload_capacity_bytes -= hexnumlen (todo_units);
8592 todo_units = std::min (todo_units,
8593 (payload_capacity_bytes / unit_size) / 2);
8596 if (todo_units <= 0)
8597 internal_error (__FILE__, __LINE__,
8598 _("minimum packet size too small to write data"));
8600 /* If we already need another packet, then try to align the end
8601 of this packet to a useful boundary. */
8602 if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units)
8603 todo_units = align_for_efficient_write (todo_units, memaddr);
8605 /* Append "<memaddr>". */
8606 memaddr = remote_address_masked (memaddr);
8607 p += hexnumstr (p, (ULONGEST) memaddr);
8614 /* Append the length and retain its location and size. It may need to be
8615 adjusted once the packet body has been created. */
8617 plenlen = hexnumstr (p, (ULONGEST) todo_units);
8625 /* Append the packet body. */
8626 if (packet_format == 'X')
8628 /* Binary mode. Send target system values byte by byte, in
8629 increasing byte addresses. Only escape certain critical
8631 payload_length_bytes =
8632 remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p,
8633 &units_written, payload_capacity_bytes);
8635 /* If not all TODO units fit, then we'll need another packet. Make
8636 a second try to keep the end of the packet aligned. Don't do
8637 this if the packet is tiny. */
8638 if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES)
8642 new_todo_units = align_for_efficient_write (units_written, memaddr);
8644 if (new_todo_units != units_written)
8645 payload_length_bytes =
8646 remote_escape_output (myaddr, new_todo_units, unit_size,
8647 (gdb_byte *) p, &units_written,
8648 payload_capacity_bytes);
8651 p += payload_length_bytes;
8652 if (use_length && units_written < todo_units)
8654 /* Escape chars have filled up the buffer prematurely,
8655 and we have actually sent fewer units than planned.
8656 Fix-up the length field of the packet. Use the same
8657 number of characters as before. */
8658 plen += hexnumnstr (plen, (ULONGEST) units_written,
8660 *plen = ':'; /* overwrite \0 from hexnumnstr() */
8665 /* Normal mode: Send target system values byte by byte, in
8666 increasing byte addresses. Each byte is encoded as a two hex
8668 p += 2 * bin2hex (myaddr, p, todo_units * unit_size);
8669 units_written = todo_units;
8672 putpkt_binary (rs->buf.data (), (int) (p - rs->buf.data ()));
8673 getpkt (&rs->buf, 0);
8675 if (rs->buf[0] == 'E')
8676 return TARGET_XFER_E_IO;
8678 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8679 send fewer units than we'd planned. */
8680 *xfered_len_units = (ULONGEST) units_written;
8681 return (*xfered_len_units != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
8684 /* Write memory data directly to the remote machine.
8685 This does not inform the data cache; the data cache uses this.
8686 MEMADDR is the address in the remote memory space.
8687 MYADDR is the address of the buffer in our space.
8688 LEN is the number of bytes.
8690 Return the transferred status, error or OK (an
8691 'enum target_xfer_status' value). Save the number of bytes
8692 transferred in *XFERED_LEN. Only transfer a single packet. */
8695 remote_target::remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr,
8696 ULONGEST len, int unit_size,
8697 ULONGEST *xfered_len)
8699 const char *packet_format = NULL;
8701 /* Check whether the target supports binary download. */
8702 check_binary_download (memaddr);
8704 switch (packet_support (PACKET_X))
8707 packet_format = "X";
8709 case PACKET_DISABLE:
8710 packet_format = "M";
8712 case PACKET_SUPPORT_UNKNOWN:
8713 internal_error (__FILE__, __LINE__,
8714 _("remote_write_bytes: bad internal state"));
8716 internal_error (__FILE__, __LINE__, _("bad switch"));
8719 return remote_write_bytes_aux (packet_format,
8720 memaddr, myaddr, len, unit_size, xfered_len,
8721 packet_format[0], 1);
8724 /* Read memory data directly from the remote machine.
8725 This does not use the data cache; the data cache uses this.
8726 MEMADDR is the address in the remote memory space.
8727 MYADDR is the address of the buffer in our space.
8728 LEN_UNITS is the number of addressable memory units to read..
8729 UNIT_SIZE is the length in bytes of an addressable unit.
8731 Return the transferred status, error or OK (an
8732 'enum target_xfer_status' value). Save the number of bytes
8733 transferred in *XFERED_LEN_UNITS.
8735 See the comment of remote_write_bytes_aux for an example of
8736 memory read/write exchange between gdb and the stub. */
8739 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr,
8741 int unit_size, ULONGEST *xfered_len_units)
8743 struct remote_state *rs = get_remote_state ();
8744 int buf_size_bytes; /* Max size of packet output buffer. */
8749 buf_size_bytes = get_memory_read_packet_size ();
8750 /* The packet buffer will be large enough for the payload;
8751 get_memory_packet_size ensures this. */
8753 /* Number of units that will fit. */
8754 todo_units = std::min (len_units,
8755 (ULONGEST) (buf_size_bytes / unit_size) / 2);
8757 /* Construct "m"<memaddr>","<len>". */
8758 memaddr = remote_address_masked (memaddr);
8759 p = rs->buf.data ();
8761 p += hexnumstr (p, (ULONGEST) memaddr);
8763 p += hexnumstr (p, (ULONGEST) todo_units);
8766 getpkt (&rs->buf, 0);
8767 if (rs->buf[0] == 'E'
8768 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
8769 && rs->buf[3] == '\0')
8770 return TARGET_XFER_E_IO;
8771 /* Reply describes memory byte by byte, each byte encoded as two hex
8773 p = rs->buf.data ();
8774 decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size);
8775 /* Return what we have. Let higher layers handle partial reads. */
8776 *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size);
8777 return (*xfered_len_units != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
8780 /* Using the set of read-only target sections of remote, read live
8783 For interface/parameters/return description see target.h,
8787 remote_target::remote_xfer_live_readonly_partial (gdb_byte *readbuf,
8791 ULONGEST *xfered_len)
8793 struct target_section *secp;
8794 struct target_section_table *table;
8796 secp = target_section_by_addr (this, memaddr);
8798 && (bfd_get_section_flags (secp->the_bfd_section->owner,
8799 secp->the_bfd_section)
8802 struct target_section *p;
8803 ULONGEST memend = memaddr + len;
8805 table = target_get_section_table (this);
8807 for (p = table->sections; p < table->sections_end; p++)
8809 if (memaddr >= p->addr)
8811 if (memend <= p->endaddr)
8813 /* Entire transfer is within this section. */
8814 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
8817 else if (memaddr >= p->endaddr)
8819 /* This section ends before the transfer starts. */
8824 /* This section overlaps the transfer. Just do half. */
8825 len = p->endaddr - memaddr;
8826 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
8833 return TARGET_XFER_EOF;
8836 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8837 first if the requested memory is unavailable in traceframe.
8838 Otherwise, fall back to remote_read_bytes_1. */
8841 remote_target::remote_read_bytes (CORE_ADDR memaddr,
8842 gdb_byte *myaddr, ULONGEST len, int unit_size,
8843 ULONGEST *xfered_len)
8846 return TARGET_XFER_EOF;
8848 if (get_traceframe_number () != -1)
8850 std::vector<mem_range> available;
8852 /* If we fail to get the set of available memory, then the
8853 target does not support querying traceframe info, and so we
8854 attempt reading from the traceframe anyway (assuming the
8855 target implements the old QTro packet then). */
8856 if (traceframe_available_memory (&available, memaddr, len))
8858 if (available.empty () || available[0].start != memaddr)
8860 enum target_xfer_status res;
8862 /* Don't read into the traceframe's available
8864 if (!available.empty ())
8866 LONGEST oldlen = len;
8868 len = available[0].start - memaddr;
8869 gdb_assert (len <= oldlen);
8872 /* This goes through the topmost target again. */
8873 res = remote_xfer_live_readonly_partial (myaddr, memaddr,
8874 len, unit_size, xfered_len);
8875 if (res == TARGET_XFER_OK)
8876 return TARGET_XFER_OK;
8879 /* No use trying further, we know some memory starting
8880 at MEMADDR isn't available. */
8882 return (*xfered_len != 0) ?
8883 TARGET_XFER_UNAVAILABLE : TARGET_XFER_EOF;
8887 /* Don't try to read more than how much is available, in
8888 case the target implements the deprecated QTro packet to
8889 cater for older GDBs (the target's knowledge of read-only
8890 sections may be outdated by now). */
8891 len = available[0].length;
8895 return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len);
8900 /* Sends a packet with content determined by the printf format string
8901 FORMAT and the remaining arguments, then gets the reply. Returns
8902 whether the packet was a success, a failure, or unknown. */
8905 remote_target::remote_send_printf (const char *format, ...)
8907 struct remote_state *rs = get_remote_state ();
8908 int max_size = get_remote_packet_size ();
8911 va_start (ap, format);
8914 int size = vsnprintf (rs->buf.data (), max_size, format, ap);
8918 if (size >= max_size)
8919 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
8921 if (putpkt (rs->buf) < 0)
8922 error (_("Communication problem with target."));
8925 getpkt (&rs->buf, 0);
8927 return packet_check_result (rs->buf);
8930 /* Flash writing can take quite some time. We'll set
8931 effectively infinite timeout for flash operations.
8932 In future, we'll need to decide on a better approach. */
8933 static const int remote_flash_timeout = 1000;
8936 remote_target::flash_erase (ULONGEST address, LONGEST length)
8938 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
8939 enum packet_result ret;
8940 scoped_restore restore_timeout
8941 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8943 ret = remote_send_printf ("vFlashErase:%s,%s",
8944 phex (address, addr_size),
8948 case PACKET_UNKNOWN:
8949 error (_("Remote target does not support flash erase"));
8951 error (_("Error erasing flash with vFlashErase packet"));
8958 remote_target::remote_flash_write (ULONGEST address,
8959 ULONGEST length, ULONGEST *xfered_len,
8960 const gdb_byte *data)
8962 scoped_restore restore_timeout
8963 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8964 return remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1,
8969 remote_target::flash_done ()
8973 scoped_restore restore_timeout
8974 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8976 ret = remote_send_printf ("vFlashDone");
8980 case PACKET_UNKNOWN:
8981 error (_("Remote target does not support vFlashDone"));
8983 error (_("Error finishing flash operation"));
8990 remote_target::files_info ()
8992 puts_filtered ("Debugging a target over a serial line.\n");
8995 /* Stuff for dealing with the packets which are part of this protocol.
8996 See comment at top of file for details. */
8998 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8999 error to higher layers. Called when a serial error is detected.
9000 The exception message is STRING, followed by a colon and a blank,
9001 the system error message for errno at function entry and final dot
9002 for output compatibility with throw_perror_with_name. */
9005 unpush_and_perror (const char *string)
9007 int saved_errno = errno;
9009 remote_unpush_target ();
9010 throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string,
9011 safe_strerror (saved_errno));
9014 /* Read a single character from the remote end. The current quit
9015 handler is overridden to avoid quitting in the middle of packet
9016 sequence, as that would break communication with the remote server.
9017 See remote_serial_quit_handler for more detail. */
9020 remote_target::readchar (int timeout)
9023 struct remote_state *rs = get_remote_state ();
9026 scoped_restore restore_quit_target
9027 = make_scoped_restore (&curr_quit_handler_target, this);
9028 scoped_restore restore_quit
9029 = make_scoped_restore (&quit_handler, ::remote_serial_quit_handler);
9031 rs->got_ctrlc_during_io = 0;
9033 ch = serial_readchar (rs->remote_desc, timeout);
9035 if (rs->got_ctrlc_during_io)
9042 switch ((enum serial_rc) ch)
9045 remote_unpush_target ();
9046 throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed"));
9049 unpush_and_perror (_("Remote communication error. "
9050 "Target disconnected."));
9052 case SERIAL_TIMEOUT:
9058 /* Wrapper for serial_write that closes the target and throws if
9059 writing fails. The current quit handler is overridden to avoid
9060 quitting in the middle of packet sequence, as that would break
9061 communication with the remote server. See
9062 remote_serial_quit_handler for more detail. */
9065 remote_target::remote_serial_write (const char *str, int len)
9067 struct remote_state *rs = get_remote_state ();
9069 scoped_restore restore_quit_target
9070 = make_scoped_restore (&curr_quit_handler_target, this);
9071 scoped_restore restore_quit
9072 = make_scoped_restore (&quit_handler, ::remote_serial_quit_handler);
9074 rs->got_ctrlc_during_io = 0;
9076 if (serial_write (rs->remote_desc, str, len))
9078 unpush_and_perror (_("Remote communication error. "
9079 "Target disconnected."));
9082 if (rs->got_ctrlc_during_io)
9086 /* Return a string representing an escaped version of BUF, of len N.
9087 E.g. \n is converted to \\n, \t to \\t, etc. */
9090 escape_buffer (const char *buf, int n)
9094 stb.putstrn (buf, n, '\\');
9095 return std::move (stb.string ());
9098 /* Display a null-terminated packet on stdout, for debugging, using C
9102 print_packet (const char *buf)
9104 puts_filtered ("\"");
9105 fputstr_filtered (buf, '"', gdb_stdout);
9106 puts_filtered ("\"");
9110 remote_target::putpkt (const char *buf)
9112 return putpkt_binary (buf, strlen (buf));
9115 /* Wrapper around remote_target::putpkt to avoid exporting
9119 putpkt (remote_target *remote, const char *buf)
9121 return remote->putpkt (buf);
9124 /* Send a packet to the remote machine, with error checking. The data
9125 of the packet is in BUF. The string in BUF can be at most
9126 get_remote_packet_size () - 5 to account for the $, # and checksum,
9127 and for a possible /0 if we are debugging (remote_debug) and want
9128 to print the sent packet as a string. */
9131 remote_target::putpkt_binary (const char *buf, int cnt)
9133 struct remote_state *rs = get_remote_state ();
9135 unsigned char csum = 0;
9136 gdb::def_vector<char> data (cnt + 6);
9137 char *buf2 = data.data ();
9143 /* Catch cases like trying to read memory or listing threads while
9144 we're waiting for a stop reply. The remote server wouldn't be
9145 ready to handle this request, so we'd hang and timeout. We don't
9146 have to worry about this in synchronous mode, because in that
9147 case it's not possible to issue a command while the target is
9148 running. This is not a problem in non-stop mode, because in that
9149 case, the stub is always ready to process serial input. */
9150 if (!target_is_non_stop_p ()
9151 && target_is_async_p ()
9152 && rs->waiting_for_stop_reply)
9154 error (_("Cannot execute this command while the target is running.\n"
9155 "Use the \"interrupt\" command to stop the target\n"
9156 "and then try again."));
9159 /* We're sending out a new packet. Make sure we don't look at a
9160 stale cached response. */
9161 rs->cached_wait_status = 0;
9163 /* Copy the packet into buffer BUF2, encapsulating it
9164 and giving it a checksum. */
9169 for (i = 0; i < cnt; i++)
9175 *p++ = tohex ((csum >> 4) & 0xf);
9176 *p++ = tohex (csum & 0xf);
9178 /* Send it over and over until we get a positive ack. */
9182 int started_error_output = 0;
9188 int len = (int) (p - buf2);
9191 = escape_buffer (buf2, std::min (len, REMOTE_DEBUG_MAX_CHAR));
9193 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s", str.c_str ());
9195 if (len > REMOTE_DEBUG_MAX_CHAR)
9196 fprintf_unfiltered (gdb_stdlog, "[%d bytes omitted]",
9197 len - REMOTE_DEBUG_MAX_CHAR);
9199 fprintf_unfiltered (gdb_stdlog, "...");
9201 gdb_flush (gdb_stdlog);
9203 remote_serial_write (buf2, p - buf2);
9205 /* If this is a no acks version of the remote protocol, send the
9206 packet and move on. */
9210 /* Read until either a timeout occurs (-2) or '+' is read.
9211 Handle any notification that arrives in the mean time. */
9214 ch = readchar (remote_timeout);
9222 case SERIAL_TIMEOUT:
9225 if (started_error_output)
9227 putchar_unfiltered ('\n');
9228 started_error_output = 0;
9237 fprintf_unfiltered (gdb_stdlog, "Ack\n");
9241 fprintf_unfiltered (gdb_stdlog, "Nak\n");
9243 case SERIAL_TIMEOUT:
9247 break; /* Retransmit buffer. */
9251 fprintf_unfiltered (gdb_stdlog,
9252 "Packet instead of Ack, ignoring it\n");
9253 /* It's probably an old response sent because an ACK
9254 was lost. Gobble up the packet and ack it so it
9255 doesn't get retransmitted when we resend this
9258 remote_serial_write ("+", 1);
9259 continue; /* Now, go look for +. */
9266 /* If we got a notification, handle it, and go back to looking
9268 /* We've found the start of a notification. Now
9269 collect the data. */
9270 val = read_frame (&rs->buf);
9275 std::string str = escape_buffer (rs->buf.data (), val);
9277 fprintf_unfiltered (gdb_stdlog,
9278 " Notification received: %s\n",
9281 handle_notification (rs->notif_state, rs->buf.data ());
9282 /* We're in sync now, rewait for the ack. */
9289 if (!started_error_output)
9291 started_error_output = 1;
9292 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
9294 fputc_unfiltered (ch & 0177, gdb_stdlog);
9295 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf.data ());
9304 if (!started_error_output)
9306 started_error_output = 1;
9307 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
9309 fputc_unfiltered (ch & 0177, gdb_stdlog);
9313 break; /* Here to retransmit. */
9317 /* This is wrong. If doing a long backtrace, the user should be
9318 able to get out next time we call QUIT, without anything as
9319 violent as interrupt_query. If we want to provide a way out of
9320 here without getting to the next QUIT, it should be based on
9321 hitting ^C twice as in remote_wait. */
9333 /* Come here after finding the start of a frame when we expected an
9334 ack. Do our best to discard the rest of this packet. */
9337 remote_target::skip_frame ()
9343 c = readchar (remote_timeout);
9346 case SERIAL_TIMEOUT:
9347 /* Nothing we can do. */
9350 /* Discard the two bytes of checksum and stop. */
9351 c = readchar (remote_timeout);
9353 c = readchar (remote_timeout);
9356 case '*': /* Run length encoding. */
9357 /* Discard the repeat count. */
9358 c = readchar (remote_timeout);
9363 /* A regular character. */
9369 /* Come here after finding the start of the frame. Collect the rest
9370 into *BUF, verifying the checksum, length, and handling run-length
9371 compression. NUL terminate the buffer. If there is not enough room,
9374 Returns -1 on error, number of characters in buffer (ignoring the
9375 trailing NULL) on success. (could be extended to return one of the
9376 SERIAL status indications). */
9379 remote_target::read_frame (gdb::char_vector *buf_p)
9384 char *buf = buf_p->data ();
9385 struct remote_state *rs = get_remote_state ();
9392 c = readchar (remote_timeout);
9395 case SERIAL_TIMEOUT:
9397 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
9401 fputs_filtered ("Saw new packet start in middle of old one\n",
9403 return -1; /* Start a new packet, count retries. */
9406 unsigned char pktcsum;
9412 check_0 = readchar (remote_timeout);
9414 check_1 = readchar (remote_timeout);
9416 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
9419 fputs_filtered ("Timeout in checksum, retrying\n",
9423 else if (check_0 < 0 || check_1 < 0)
9426 fputs_filtered ("Communication error in checksum\n",
9431 /* Don't recompute the checksum; with no ack packets we
9432 don't have any way to indicate a packet retransmission
9437 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
9438 if (csum == pktcsum)
9443 std::string str = escape_buffer (buf, bc);
9445 fprintf_unfiltered (gdb_stdlog,
9446 "Bad checksum, sentsum=0x%x, "
9447 "csum=0x%x, buf=%s\n",
9448 pktcsum, csum, str.c_str ());
9450 /* Number of characters in buffer ignoring trailing
9454 case '*': /* Run length encoding. */
9459 c = readchar (remote_timeout);
9461 repeat = c - ' ' + 3; /* Compute repeat count. */
9463 /* The character before ``*'' is repeated. */
9465 if (repeat > 0 && repeat <= 255 && bc > 0)
9467 if (bc + repeat - 1 >= buf_p->size () - 1)
9469 /* Make some more room in the buffer. */
9470 buf_p->resize (buf_p->size () + repeat);
9471 buf = buf_p->data ();
9474 memset (&buf[bc], buf[bc - 1], repeat);
9480 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
9484 if (bc >= buf_p->size () - 1)
9486 /* Make some more room in the buffer. */
9487 buf_p->resize (buf_p->size () * 2);
9488 buf = buf_p->data ();
9498 /* Read a packet from the remote machine, with error checking, and
9499 store it in *BUF. Resize *BUF if necessary to hold the result. If
9500 FOREVER, wait forever rather than timing out; this is used (in
9501 synchronous mode) to wait for a target that is is executing user
9503 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9504 don't have to change all the calls to getpkt to deal with the
9505 return value, because at the moment I don't know what the right
9506 thing to do it for those. */
9509 remote_target::getpkt (gdb::char_vector *buf, int forever)
9511 getpkt_sane (buf, forever);
9515 /* Read a packet from the remote machine, with error checking, and
9516 store it in *BUF. Resize *BUF if necessary to hold the result. If
9517 FOREVER, wait forever rather than timing out; this is used (in
9518 synchronous mode) to wait for a target that is is executing user
9519 code to stop. If FOREVER == 0, this function is allowed to time
9520 out gracefully and return an indication of this to the caller.
9521 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9522 consider receiving a notification enough reason to return to the
9523 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9524 holds a notification or not (a regular packet). */
9527 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector *buf,
9528 int forever, int expecting_notif,
9531 struct remote_state *rs = get_remote_state ();
9537 /* We're reading a new response. Make sure we don't look at a
9538 previously cached response. */
9539 rs->cached_wait_status = 0;
9541 strcpy (buf->data (), "timeout");
9544 timeout = watchdog > 0 ? watchdog : -1;
9545 else if (expecting_notif)
9546 timeout = 0; /* There should already be a char in the buffer. If
9549 timeout = remote_timeout;
9553 /* Process any number of notifications, and then return when
9557 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9559 for (tries = 1; tries <= MAX_TRIES; tries++)
9561 /* This can loop forever if the remote side sends us
9562 characters continuously, but if it pauses, we'll get
9563 SERIAL_TIMEOUT from readchar because of timeout. Then
9564 we'll count that as a retry.
9566 Note that even when forever is set, we will only wait
9567 forever prior to the start of a packet. After that, we
9568 expect characters to arrive at a brisk pace. They should
9569 show up within remote_timeout intervals. */
9571 c = readchar (timeout);
9572 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
9574 if (c == SERIAL_TIMEOUT)
9576 if (expecting_notif)
9577 return -1; /* Don't complain, it's normal to not get
9578 anything in this case. */
9580 if (forever) /* Watchdog went off? Kill the target. */
9582 remote_unpush_target ();
9583 throw_error (TARGET_CLOSE_ERROR,
9584 _("Watchdog timeout has expired. "
9585 "Target detached."));
9588 fputs_filtered ("Timed out.\n", gdb_stdlog);
9592 /* We've found the start of a packet or notification.
9593 Now collect the data. */
9594 val = read_frame (buf);
9599 remote_serial_write ("-", 1);
9602 if (tries > MAX_TRIES)
9604 /* We have tried hard enough, and just can't receive the
9605 packet/notification. Give up. */
9606 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9608 /* Skip the ack char if we're in no-ack mode. */
9609 if (!rs->noack_mode)
9610 remote_serial_write ("+", 1);
9614 /* If we got an ordinary packet, return that to our caller. */
9620 = escape_buffer (buf->data (),
9621 std::min (val, REMOTE_DEBUG_MAX_CHAR));
9623 fprintf_unfiltered (gdb_stdlog, "Packet received: %s",
9626 if (val > REMOTE_DEBUG_MAX_CHAR)
9627 fprintf_unfiltered (gdb_stdlog, "[%d bytes omitted]",
9628 val - REMOTE_DEBUG_MAX_CHAR);
9630 fprintf_unfiltered (gdb_stdlog, "\n");
9633 /* Skip the ack char if we're in no-ack mode. */
9634 if (!rs->noack_mode)
9635 remote_serial_write ("+", 1);
9636 if (is_notif != NULL)
9641 /* If we got a notification, handle it, and go back to looking
9645 gdb_assert (c == '%');
9649 std::string str = escape_buffer (buf->data (), val);
9651 fprintf_unfiltered (gdb_stdlog,
9652 " Notification received: %s\n",
9655 if (is_notif != NULL)
9658 handle_notification (rs->notif_state, buf->data ());
9660 /* Notifications require no acknowledgement. */
9662 if (expecting_notif)
9669 remote_target::getpkt_sane (gdb::char_vector *buf, int forever)
9671 return getpkt_or_notif_sane_1 (buf, forever, 0, NULL);
9675 remote_target::getpkt_or_notif_sane (gdb::char_vector *buf, int forever,
9678 return getpkt_or_notif_sane_1 (buf, forever, 1, is_notif);
9681 /* Kill any new fork children of process PID that haven't been
9682 processed by follow_fork. */
9685 remote_target::kill_new_fork_children (int pid)
9687 remote_state *rs = get_remote_state ();
9688 struct notif_client *notif = ¬if_client_stop;
9690 /* Kill the fork child threads of any threads in process PID
9691 that are stopped at a fork event. */
9692 for (thread_info *thread : all_non_exited_threads ())
9694 struct target_waitstatus *ws = &thread->pending_follow;
9696 if (is_pending_fork_parent (ws, pid, thread->ptid))
9698 int child_pid = ws->value.related_pid.pid ();
9701 res = remote_vkill (child_pid);
9703 error (_("Can't kill fork child process %d"), child_pid);
9707 /* Check for any pending fork events (not reported or processed yet)
9708 in process PID and kill those fork child threads as well. */
9709 remote_notif_get_pending_events (notif);
9710 for (auto &event : rs->stop_reply_queue)
9711 if (is_pending_fork_parent (&event->ws, pid, event->ptid))
9713 int child_pid = event->ws.value.related_pid.pid ();
9716 res = remote_vkill (child_pid);
9718 error (_("Can't kill fork child process %d"), child_pid);
9723 /* Target hook to kill the current inferior. */
9726 remote_target::kill ()
9729 int pid = inferior_ptid.pid ();
9730 struct remote_state *rs = get_remote_state ();
9732 if (packet_support (PACKET_vKill) != PACKET_DISABLE)
9734 /* If we're stopped while forking and we haven't followed yet,
9735 kill the child task. We need to do this before killing the
9736 parent task because if this is a vfork then the parent will
9738 kill_new_fork_children (pid);
9740 res = remote_vkill (pid);
9743 target_mourn_inferior (inferior_ptid);
9748 /* If we are in 'target remote' mode and we are killing the only
9749 inferior, then we will tell gdbserver to exit and unpush the
9751 if (res == -1 && !remote_multi_process_p (rs)
9752 && number_of_live_inferiors () == 1)
9756 /* We've killed the remote end, we get to mourn it. If we are
9757 not in extended mode, mourning the inferior also unpushes
9758 remote_ops from the target stack, which closes the remote
9760 target_mourn_inferior (inferior_ptid);
9765 error (_("Can't kill process"));
9768 /* Send a kill request to the target using the 'vKill' packet. */
9771 remote_target::remote_vkill (int pid)
9773 if (packet_support (PACKET_vKill) == PACKET_DISABLE)
9776 remote_state *rs = get_remote_state ();
9778 /* Tell the remote target to detach. */
9779 xsnprintf (rs->buf.data (), get_remote_packet_size (), "vKill;%x", pid);
9781 getpkt (&rs->buf, 0);
9783 switch (packet_ok (rs->buf,
9784 &remote_protocol_packets[PACKET_vKill]))
9790 case PACKET_UNKNOWN:
9793 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
9797 /* Send a kill request to the target using the 'k' packet. */
9800 remote_target::remote_kill_k ()
9802 /* Catch errors so the user can quit from gdb even when we
9803 aren't on speaking terms with the remote system. */
9808 CATCH (ex, RETURN_MASK_ERROR)
9810 if (ex.error == TARGET_CLOSE_ERROR)
9812 /* If we got an (EOF) error that caused the target
9813 to go away, then we're done, that's what we wanted.
9814 "k" is susceptible to cause a premature EOF, given
9815 that the remote server isn't actually required to
9816 reply to "k", and it can happen that it doesn't
9817 even get to reply ACK to the "k". */
9821 /* Otherwise, something went wrong. We didn't actually kill
9822 the target. Just propagate the exception, and let the
9823 user or higher layers decide what to do. */
9824 throw_exception (ex);
9830 remote_target::mourn_inferior ()
9832 struct remote_state *rs = get_remote_state ();
9834 /* We're no longer interested in notification events of an inferior
9835 that exited or was killed/detached. */
9836 discard_pending_stop_replies (current_inferior ());
9838 /* In 'target remote' mode with one inferior, we close the connection. */
9839 if (!rs->extended && number_of_live_inferiors () <= 1)
9841 unpush_target (this);
9843 /* remote_close takes care of doing most of the clean up. */
9844 generic_mourn_inferior ();
9848 /* In case we got here due to an error, but we're going to stay
9850 rs->waiting_for_stop_reply = 0;
9852 /* If the current general thread belonged to the process we just
9853 detached from or has exited, the remote side current general
9854 thread becomes undefined. Considering a case like this:
9856 - We just got here due to a detach.
9857 - The process that we're detaching from happens to immediately
9858 report a global breakpoint being hit in non-stop mode, in the
9859 same thread we had selected before.
9860 - GDB attaches to this process again.
9861 - This event happens to be the next event we handle.
9863 GDB would consider that the current general thread didn't need to
9864 be set on the stub side (with Hg), since for all it knew,
9865 GENERAL_THREAD hadn't changed.
9867 Notice that although in all-stop mode, the remote server always
9868 sets the current thread to the thread reporting the stop event,
9869 that doesn't happen in non-stop mode; in non-stop, the stub *must
9870 not* change the current thread when reporting a breakpoint hit,
9871 due to the decoupling of event reporting and event handling.
9873 To keep things simple, we always invalidate our notion of the
9875 record_currthread (rs, minus_one_ptid);
9877 /* Call common code to mark the inferior as not running. */
9878 generic_mourn_inferior ();
9880 if (!have_inferiors ())
9882 if (!remote_multi_process_p (rs))
9884 /* Check whether the target is running now - some remote stubs
9885 automatically restart after kill. */
9887 getpkt (&rs->buf, 0);
9889 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
9891 /* Assume that the target has been restarted. Set
9892 inferior_ptid so that bits of core GDB realizes
9893 there's something here, e.g., so that the user can
9894 say "kill" again. */
9895 inferior_ptid = magic_null_ptid;
9902 extended_remote_target::supports_disable_randomization ()
9904 return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE;
9908 remote_target::extended_remote_disable_randomization (int val)
9910 struct remote_state *rs = get_remote_state ();
9913 xsnprintf (rs->buf.data (), get_remote_packet_size (),
9914 "QDisableRandomization:%x", val);
9916 reply = remote_get_noisy_reply ();
9918 error (_("Target does not support QDisableRandomization."));
9919 if (strcmp (reply, "OK") != 0)
9920 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
9924 remote_target::extended_remote_run (const std::string &args)
9926 struct remote_state *rs = get_remote_state ();
9928 const char *remote_exec_file = get_remote_exec_file ();
9930 /* If the user has disabled vRun support, or we have detected that
9931 support is not available, do not try it. */
9932 if (packet_support (PACKET_vRun) == PACKET_DISABLE)
9935 strcpy (rs->buf.data (), "vRun;");
9936 len = strlen (rs->buf.data ());
9938 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
9939 error (_("Remote file name too long for run packet"));
9940 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf.data () + len,
9941 strlen (remote_exec_file));
9947 gdb_argv argv (args.c_str ());
9948 for (i = 0; argv[i] != NULL; i++)
9950 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
9951 error (_("Argument list too long for run packet"));
9952 rs->buf[len++] = ';';
9953 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf.data () + len,
9958 rs->buf[len++] = '\0';
9961 getpkt (&rs->buf, 0);
9963 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]))
9966 /* We have a wait response. All is well. */
9968 case PACKET_UNKNOWN:
9971 if (remote_exec_file[0] == '\0')
9972 error (_("Running the default executable on the remote target failed; "
9973 "try \"set remote exec-file\"?"));
9975 error (_("Running \"%s\" on the remote target failed"),
9978 gdb_assert_not_reached (_("bad switch"));
9982 /* Helper function to send set/unset environment packets. ACTION is
9983 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9984 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9988 remote_target::send_environment_packet (const char *action,
9992 remote_state *rs = get_remote_state ();
9994 /* Convert the environment variable to an hex string, which
9995 is the best format to be transmitted over the wire. */
9996 std::string encoded_value = bin2hex ((const gdb_byte *) value,
9999 xsnprintf (rs->buf.data (), get_remote_packet_size (),
10000 "%s:%s", packet, encoded_value.c_str ());
10003 getpkt (&rs->buf, 0);
10004 if (strcmp (rs->buf.data (), "OK") != 0)
10005 warning (_("Unable to %s environment variable '%s' on remote."),
10009 /* Helper function to handle the QEnvironment* packets. */
10012 remote_target::extended_remote_environment_support ()
10014 remote_state *rs = get_remote_state ();
10016 if (packet_support (PACKET_QEnvironmentReset) != PACKET_DISABLE)
10018 putpkt ("QEnvironmentReset");
10019 getpkt (&rs->buf, 0);
10020 if (strcmp (rs->buf.data (), "OK") != 0)
10021 warning (_("Unable to reset environment on remote."));
10024 gdb_environ *e = ¤t_inferior ()->environment;
10026 if (packet_support (PACKET_QEnvironmentHexEncoded) != PACKET_DISABLE)
10027 for (const std::string &el : e->user_set_env ())
10028 send_environment_packet ("set", "QEnvironmentHexEncoded",
10031 if (packet_support (PACKET_QEnvironmentUnset) != PACKET_DISABLE)
10032 for (const std::string &el : e->user_unset_env ())
10033 send_environment_packet ("unset", "QEnvironmentUnset", el.c_str ());
10036 /* Helper function to set the current working directory for the
10037 inferior in the remote target. */
10040 remote_target::extended_remote_set_inferior_cwd ()
10042 if (packet_support (PACKET_QSetWorkingDir) != PACKET_DISABLE)
10044 const char *inferior_cwd = get_inferior_cwd ();
10045 remote_state *rs = get_remote_state ();
10047 if (inferior_cwd != NULL)
10049 std::string hexpath = bin2hex ((const gdb_byte *) inferior_cwd,
10050 strlen (inferior_cwd));
10052 xsnprintf (rs->buf.data (), get_remote_packet_size (),
10053 "QSetWorkingDir:%s", hexpath.c_str ());
10057 /* An empty inferior_cwd means that the user wants us to
10058 reset the remote server's inferior's cwd. */
10059 xsnprintf (rs->buf.data (), get_remote_packet_size (),
10060 "QSetWorkingDir:");
10064 getpkt (&rs->buf, 0);
10065 if (packet_ok (rs->buf,
10066 &remote_protocol_packets[PACKET_QSetWorkingDir])
10069 Remote replied unexpectedly while setting the inferior's working\n\
10076 /* In the extended protocol we want to be able to do things like
10077 "run" and have them basically work as expected. So we need
10078 a special create_inferior function. We support changing the
10079 executable file and the command line arguments, but not the
10083 extended_remote_target::create_inferior (const char *exec_file,
10084 const std::string &args,
10085 char **env, int from_tty)
10089 struct remote_state *rs = get_remote_state ();
10090 const char *remote_exec_file = get_remote_exec_file ();
10092 /* If running asynchronously, register the target file descriptor
10093 with the event loop. */
10094 if (target_can_async_p ())
10097 /* Disable address space randomization if requested (and supported). */
10098 if (supports_disable_randomization ())
10099 extended_remote_disable_randomization (disable_randomization);
10101 /* If startup-with-shell is on, we inform gdbserver to start the
10102 remote inferior using a shell. */
10103 if (packet_support (PACKET_QStartupWithShell) != PACKET_DISABLE)
10105 xsnprintf (rs->buf.data (), get_remote_packet_size (),
10106 "QStartupWithShell:%d", startup_with_shell ? 1 : 0);
10108 getpkt (&rs->buf, 0);
10109 if (strcmp (rs->buf.data (), "OK") != 0)
10111 Remote replied unexpectedly while setting startup-with-shell: %s"),
10115 extended_remote_environment_support ();
10117 extended_remote_set_inferior_cwd ();
10119 /* Now restart the remote server. */
10120 run_worked = extended_remote_run (args) != -1;
10123 /* vRun was not supported. Fail if we need it to do what the
10125 if (remote_exec_file[0])
10126 error (_("Remote target does not support \"set remote exec-file\""));
10127 if (!args.empty ())
10128 error (_("Remote target does not support \"set args\" or run ARGS"));
10130 /* Fall back to "R". */
10131 extended_remote_restart ();
10134 /* vRun's success return is a stop reply. */
10135 stop_reply = run_worked ? rs->buf.data () : NULL;
10136 add_current_inferior_and_thread (stop_reply);
10138 /* Get updated offsets, if the stub uses qOffsets. */
10143 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10144 the list of conditions (in agent expression bytecode format), if any, the
10145 target needs to evaluate. The output is placed into the packet buffer
10146 started from BUF and ended at BUF_END. */
10149 remote_add_target_side_condition (struct gdbarch *gdbarch,
10150 struct bp_target_info *bp_tgt, char *buf,
10153 if (bp_tgt->conditions.empty ())
10156 buf += strlen (buf);
10157 xsnprintf (buf, buf_end - buf, "%s", ";");
10160 /* Send conditions to the target. */
10161 for (agent_expr *aexpr : bp_tgt->conditions)
10163 xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
10164 buf += strlen (buf);
10165 for (int i = 0; i < aexpr->len; ++i)
10166 buf = pack_hex_byte (buf, aexpr->buf[i]);
10173 remote_add_target_side_commands (struct gdbarch *gdbarch,
10174 struct bp_target_info *bp_tgt, char *buf)
10176 if (bp_tgt->tcommands.empty ())
10179 buf += strlen (buf);
10181 sprintf (buf, ";cmds:%x,", bp_tgt->persist);
10182 buf += strlen (buf);
10184 /* Concatenate all the agent expressions that are commands into the
10186 for (agent_expr *aexpr : bp_tgt->tcommands)
10188 sprintf (buf, "X%x,", aexpr->len);
10189 buf += strlen (buf);
10190 for (int i = 0; i < aexpr->len; ++i)
10191 buf = pack_hex_byte (buf, aexpr->buf[i]);
10196 /* Insert a breakpoint. On targets that have software breakpoint
10197 support, we ask the remote target to do the work; on targets
10198 which don't, we insert a traditional memory breakpoint. */
10201 remote_target::insert_breakpoint (struct gdbarch *gdbarch,
10202 struct bp_target_info *bp_tgt)
10204 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10205 If it succeeds, then set the support to PACKET_ENABLE. If it
10206 fails, and the user has explicitly requested the Z support then
10207 report an error, otherwise, mark it disabled and go on. */
10209 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
10211 CORE_ADDR addr = bp_tgt->reqstd_address;
10212 struct remote_state *rs;
10215 /* Make sure the remote is pointing at the right process, if
10217 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10218 set_general_process ();
10220 rs = get_remote_state ();
10221 p = rs->buf.data ();
10222 endbuf = p + get_remote_packet_size ();
10227 addr = (ULONGEST) remote_address_masked (addr);
10228 p += hexnumstr (p, addr);
10229 xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
10231 if (supports_evaluation_of_breakpoint_conditions ())
10232 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
10234 if (can_run_breakpoint_commands ())
10235 remote_add_target_side_commands (gdbarch, bp_tgt, p);
10238 getpkt (&rs->buf, 0);
10240 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
10246 case PACKET_UNKNOWN:
10251 /* If this breakpoint has target-side commands but this stub doesn't
10252 support Z0 packets, throw error. */
10253 if (!bp_tgt->tcommands.empty ())
10254 throw_error (NOT_SUPPORTED_ERROR, _("\
10255 Target doesn't support breakpoints that have target side commands."));
10257 return memory_insert_breakpoint (this, gdbarch, bp_tgt);
10261 remote_target::remove_breakpoint (struct gdbarch *gdbarch,
10262 struct bp_target_info *bp_tgt,
10263 enum remove_bp_reason reason)
10265 CORE_ADDR addr = bp_tgt->placed_address;
10266 struct remote_state *rs = get_remote_state ();
10268 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
10270 char *p = rs->buf.data ();
10271 char *endbuf = p + get_remote_packet_size ();
10273 /* Make sure the remote is pointing at the right process, if
10275 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10276 set_general_process ();
10282 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
10283 p += hexnumstr (p, addr);
10284 xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
10287 getpkt (&rs->buf, 0);
10289 return (rs->buf[0] == 'E');
10292 return memory_remove_breakpoint (this, gdbarch, bp_tgt, reason);
10295 static enum Z_packet_type
10296 watchpoint_to_Z_packet (int type)
10301 return Z_PACKET_WRITE_WP;
10304 return Z_PACKET_READ_WP;
10307 return Z_PACKET_ACCESS_WP;
10310 internal_error (__FILE__, __LINE__,
10311 _("hw_bp_to_z: bad watchpoint type %d"), type);
10316 remote_target::insert_watchpoint (CORE_ADDR addr, int len,
10317 enum target_hw_bp_type type, struct expression *cond)
10319 struct remote_state *rs = get_remote_state ();
10320 char *endbuf = rs->buf.data () + get_remote_packet_size ();
10322 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
10324 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
10327 /* Make sure the remote is pointing at the right process, if
10329 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10330 set_general_process ();
10332 xsnprintf (rs->buf.data (), endbuf - rs->buf.data (), "Z%x,", packet);
10333 p = strchr (rs->buf.data (), '\0');
10334 addr = remote_address_masked (addr);
10335 p += hexnumstr (p, (ULONGEST) addr);
10336 xsnprintf (p, endbuf - p, ",%x", len);
10339 getpkt (&rs->buf, 0);
10341 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
10345 case PACKET_UNKNOWN:
10350 internal_error (__FILE__, __LINE__,
10351 _("remote_insert_watchpoint: reached end of function"));
10355 remote_target::watchpoint_addr_within_range (CORE_ADDR addr,
10356 CORE_ADDR start, int length)
10358 CORE_ADDR diff = remote_address_masked (addr - start);
10360 return diff < length;
10365 remote_target::remove_watchpoint (CORE_ADDR addr, int len,
10366 enum target_hw_bp_type type, struct expression *cond)
10368 struct remote_state *rs = get_remote_state ();
10369 char *endbuf = rs->buf.data () + get_remote_packet_size ();
10371 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
10373 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
10376 /* Make sure the remote is pointing at the right process, if
10378 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10379 set_general_process ();
10381 xsnprintf (rs->buf.data (), endbuf - rs->buf.data (), "z%x,", packet);
10382 p = strchr (rs->buf.data (), '\0');
10383 addr = remote_address_masked (addr);
10384 p += hexnumstr (p, (ULONGEST) addr);
10385 xsnprintf (p, endbuf - p, ",%x", len);
10387 getpkt (&rs->buf, 0);
10389 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
10392 case PACKET_UNKNOWN:
10397 internal_error (__FILE__, __LINE__,
10398 _("remote_remove_watchpoint: reached end of function"));
10402 int remote_hw_watchpoint_limit = -1;
10403 int remote_hw_watchpoint_length_limit = -1;
10404 int remote_hw_breakpoint_limit = -1;
10407 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
10409 if (remote_hw_watchpoint_length_limit == 0)
10411 else if (remote_hw_watchpoint_length_limit < 0)
10413 else if (len <= remote_hw_watchpoint_length_limit)
10420 remote_target::can_use_hw_breakpoint (enum bptype type, int cnt, int ot)
10422 if (type == bp_hardware_breakpoint)
10424 if (remote_hw_breakpoint_limit == 0)
10426 else if (remote_hw_breakpoint_limit < 0)
10428 else if (cnt <= remote_hw_breakpoint_limit)
10433 if (remote_hw_watchpoint_limit == 0)
10435 else if (remote_hw_watchpoint_limit < 0)
10439 else if (cnt <= remote_hw_watchpoint_limit)
10445 /* The to_stopped_by_sw_breakpoint method of target remote. */
10448 remote_target::stopped_by_sw_breakpoint ()
10450 struct thread_info *thread = inferior_thread ();
10452 return (thread->priv != NULL
10453 && (get_remote_thread_info (thread)->stop_reason
10454 == TARGET_STOPPED_BY_SW_BREAKPOINT));
10457 /* The to_supports_stopped_by_sw_breakpoint method of target
10461 remote_target::supports_stopped_by_sw_breakpoint ()
10463 return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE);
10466 /* The to_stopped_by_hw_breakpoint method of target remote. */
10469 remote_target::stopped_by_hw_breakpoint ()
10471 struct thread_info *thread = inferior_thread ();
10473 return (thread->priv != NULL
10474 && (get_remote_thread_info (thread)->stop_reason
10475 == TARGET_STOPPED_BY_HW_BREAKPOINT));
10478 /* The to_supports_stopped_by_hw_breakpoint method of target
10482 remote_target::supports_stopped_by_hw_breakpoint ()
10484 return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE);
10488 remote_target::stopped_by_watchpoint ()
10490 struct thread_info *thread = inferior_thread ();
10492 return (thread->priv != NULL
10493 && (get_remote_thread_info (thread)->stop_reason
10494 == TARGET_STOPPED_BY_WATCHPOINT));
10498 remote_target::stopped_data_address (CORE_ADDR *addr_p)
10500 struct thread_info *thread = inferior_thread ();
10502 if (thread->priv != NULL
10503 && (get_remote_thread_info (thread)->stop_reason
10504 == TARGET_STOPPED_BY_WATCHPOINT))
10506 *addr_p = get_remote_thread_info (thread)->watch_data_address;
10515 remote_target::insert_hw_breakpoint (struct gdbarch *gdbarch,
10516 struct bp_target_info *bp_tgt)
10518 CORE_ADDR addr = bp_tgt->reqstd_address;
10519 struct remote_state *rs;
10523 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
10526 /* Make sure the remote is pointing at the right process, if
10528 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10529 set_general_process ();
10531 rs = get_remote_state ();
10532 p = rs->buf.data ();
10533 endbuf = p + get_remote_packet_size ();
10539 addr = remote_address_masked (addr);
10540 p += hexnumstr (p, (ULONGEST) addr);
10541 xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
10543 if (supports_evaluation_of_breakpoint_conditions ())
10544 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
10546 if (can_run_breakpoint_commands ())
10547 remote_add_target_side_commands (gdbarch, bp_tgt, p);
10550 getpkt (&rs->buf, 0);
10552 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
10555 if (rs->buf[1] == '.')
10557 message = strchr (&rs->buf[2], '.');
10559 error (_("Remote failure reply: %s"), message + 1);
10562 case PACKET_UNKNOWN:
10567 internal_error (__FILE__, __LINE__,
10568 _("remote_insert_hw_breakpoint: reached end of function"));
10573 remote_target::remove_hw_breakpoint (struct gdbarch *gdbarch,
10574 struct bp_target_info *bp_tgt)
10577 struct remote_state *rs = get_remote_state ();
10578 char *p = rs->buf.data ();
10579 char *endbuf = p + get_remote_packet_size ();
10581 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
10584 /* Make sure the remote is pointing at the right process, if
10586 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10587 set_general_process ();
10593 addr = remote_address_masked (bp_tgt->placed_address);
10594 p += hexnumstr (p, (ULONGEST) addr);
10595 xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
10598 getpkt (&rs->buf, 0);
10600 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
10603 case PACKET_UNKNOWN:
10608 internal_error (__FILE__, __LINE__,
10609 _("remote_remove_hw_breakpoint: reached end of function"));
10612 /* Verify memory using the "qCRC:" request. */
10615 remote_target::verify_memory (const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
10617 struct remote_state *rs = get_remote_state ();
10618 unsigned long host_crc, target_crc;
10621 /* It doesn't make sense to use qCRC if the remote target is
10622 connected but not running. */
10623 if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE)
10625 enum packet_result result;
10627 /* Make sure the remote is pointing at the right process. */
10628 set_general_process ();
10630 /* FIXME: assumes lma can fit into long. */
10631 xsnprintf (rs->buf.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10632 (long) lma, (long) size);
10635 /* Be clever; compute the host_crc before waiting for target
10637 host_crc = xcrc32 (data, size, 0xffffffff);
10639 getpkt (&rs->buf, 0);
10641 result = packet_ok (rs->buf,
10642 &remote_protocol_packets[PACKET_qCRC]);
10643 if (result == PACKET_ERROR)
10645 else if (result == PACKET_OK)
10647 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
10648 target_crc = target_crc * 16 + fromhex (*tmp);
10650 return (host_crc == target_crc);
10654 return simple_verify_memory (this, data, lma, size);
10657 /* compare-sections command
10659 With no arguments, compares each loadable section in the exec bfd
10660 with the same memory range on the target, and reports mismatches.
10661 Useful for verifying the image on the target against the exec file. */
10664 compare_sections_command (const char *args, int from_tty)
10667 const char *sectname;
10668 bfd_size_type size;
10671 int mismatched = 0;
10676 error (_("command cannot be used without an exec file"));
10678 if (args != NULL && strcmp (args, "-r") == 0)
10684 for (s = exec_bfd->sections; s; s = s->next)
10686 if (!(s->flags & SEC_LOAD))
10687 continue; /* Skip non-loadable section. */
10689 if (read_only && (s->flags & SEC_READONLY) == 0)
10690 continue; /* Skip writeable sections */
10692 size = bfd_get_section_size (s);
10694 continue; /* Skip zero-length section. */
10696 sectname = bfd_get_section_name (exec_bfd, s);
10697 if (args && strcmp (args, sectname) != 0)
10698 continue; /* Not the section selected by user. */
10700 matched = 1; /* Do this section. */
10703 gdb::byte_vector sectdata (size);
10704 bfd_get_section_contents (exec_bfd, s, sectdata.data (), 0, size);
10706 res = target_verify_memory (sectdata.data (), lma, size);
10709 error (_("target memory fault, section %s, range %s -- %s"), sectname,
10710 paddress (target_gdbarch (), lma),
10711 paddress (target_gdbarch (), lma + size));
10713 printf_filtered ("Section %s, range %s -- %s: ", sectname,
10714 paddress (target_gdbarch (), lma),
10715 paddress (target_gdbarch (), lma + size));
10717 printf_filtered ("matched.\n");
10720 printf_filtered ("MIS-MATCHED!\n");
10724 if (mismatched > 0)
10725 warning (_("One or more sections of the target image does not match\n\
10726 the loaded file\n"));
10727 if (args && !matched)
10728 printf_filtered (_("No loaded section named '%s'.\n"), args);
10731 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10732 into remote target. The number of bytes written to the remote
10733 target is returned, or -1 for error. */
10736 remote_target::remote_write_qxfer (const char *object_name,
10737 const char *annex, const gdb_byte *writebuf,
10738 ULONGEST offset, LONGEST len,
10739 ULONGEST *xfered_len,
10740 struct packet_config *packet)
10744 struct remote_state *rs = get_remote_state ();
10745 int max_size = get_memory_write_packet_size ();
10747 if (packet_config_support (packet) == PACKET_DISABLE)
10748 return TARGET_XFER_E_IO;
10750 /* Insert header. */
10751 i = snprintf (rs->buf.data (), max_size,
10752 "qXfer:%s:write:%s:%s:",
10753 object_name, annex ? annex : "",
10754 phex_nz (offset, sizeof offset));
10755 max_size -= (i + 1);
10757 /* Escape as much data as fits into rs->buf. */
10758 buf_len = remote_escape_output
10759 (writebuf, len, 1, (gdb_byte *) rs->buf.data () + i, &max_size, max_size);
10761 if (putpkt_binary (rs->buf.data (), i + buf_len) < 0
10762 || getpkt_sane (&rs->buf, 0) < 0
10763 || packet_ok (rs->buf, packet) != PACKET_OK)
10764 return TARGET_XFER_E_IO;
10766 unpack_varlen_hex (rs->buf.data (), &n);
10769 return (*xfered_len != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
10772 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10773 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10774 number of bytes read is returned, or 0 for EOF, or -1 for error.
10775 The number of bytes read may be less than LEN without indicating an
10776 EOF. PACKET is checked and updated to indicate whether the remote
10777 target supports this object. */
10780 remote_target::remote_read_qxfer (const char *object_name,
10782 gdb_byte *readbuf, ULONGEST offset,
10784 ULONGEST *xfered_len,
10785 struct packet_config *packet)
10787 struct remote_state *rs = get_remote_state ();
10788 LONGEST i, n, packet_len;
10790 if (packet_config_support (packet) == PACKET_DISABLE)
10791 return TARGET_XFER_E_IO;
10793 /* Check whether we've cached an end-of-object packet that matches
10795 if (rs->finished_object)
10797 if (strcmp (object_name, rs->finished_object) == 0
10798 && strcmp (annex ? annex : "", rs->finished_annex) == 0
10799 && offset == rs->finished_offset)
10800 return TARGET_XFER_EOF;
10803 /* Otherwise, we're now reading something different. Discard
10805 xfree (rs->finished_object);
10806 xfree (rs->finished_annex);
10807 rs->finished_object = NULL;
10808 rs->finished_annex = NULL;
10811 /* Request only enough to fit in a single packet. The actual data
10812 may not, since we don't know how much of it will need to be escaped;
10813 the target is free to respond with slightly less data. We subtract
10814 five to account for the response type and the protocol frame. */
10815 n = std::min<LONGEST> (get_remote_packet_size () - 5, len);
10816 snprintf (rs->buf.data (), get_remote_packet_size () - 4,
10817 "qXfer:%s:read:%s:%s,%s",
10818 object_name, annex ? annex : "",
10819 phex_nz (offset, sizeof offset),
10820 phex_nz (n, sizeof n));
10821 i = putpkt (rs->buf);
10823 return TARGET_XFER_E_IO;
10826 packet_len = getpkt_sane (&rs->buf, 0);
10827 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
10828 return TARGET_XFER_E_IO;
10830 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
10831 error (_("Unknown remote qXfer reply: %s"), rs->buf.data ());
10833 /* 'm' means there is (or at least might be) more data after this
10834 batch. That does not make sense unless there's at least one byte
10835 of data in this reply. */
10836 if (rs->buf[0] == 'm' && packet_len == 1)
10837 error (_("Remote qXfer reply contained no data."));
10839 /* Got some data. */
10840 i = remote_unescape_input ((gdb_byte *) rs->buf.data () + 1,
10841 packet_len - 1, readbuf, n);
10843 /* 'l' is an EOF marker, possibly including a final block of data,
10844 or possibly empty. If we have the final block of a non-empty
10845 object, record this fact to bypass a subsequent partial read. */
10846 if (rs->buf[0] == 'l' && offset + i > 0)
10848 rs->finished_object = xstrdup (object_name);
10849 rs->finished_annex = xstrdup (annex ? annex : "");
10850 rs->finished_offset = offset + i;
10854 return TARGET_XFER_EOF;
10858 return TARGET_XFER_OK;
10862 enum target_xfer_status
10863 remote_target::xfer_partial (enum target_object object,
10864 const char *annex, gdb_byte *readbuf,
10865 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
10866 ULONGEST *xfered_len)
10868 struct remote_state *rs;
10872 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
10874 set_remote_traceframe ();
10875 set_general_thread (inferior_ptid);
10877 rs = get_remote_state ();
10879 /* Handle memory using the standard memory routines. */
10880 if (object == TARGET_OBJECT_MEMORY)
10882 /* If the remote target is connected but not running, we should
10883 pass this request down to a lower stratum (e.g. the executable
10885 if (!target_has_execution)
10886 return TARGET_XFER_EOF;
10888 if (writebuf != NULL)
10889 return remote_write_bytes (offset, writebuf, len, unit_size,
10892 return remote_read_bytes (offset, readbuf, len, unit_size,
10896 /* Handle SPU memory using qxfer packets. */
10897 if (object == TARGET_OBJECT_SPU)
10900 return remote_read_qxfer ("spu", annex, readbuf, offset, len,
10901 xfered_len, &remote_protocol_packets
10902 [PACKET_qXfer_spu_read]);
10904 return remote_write_qxfer ("spu", annex, writebuf, offset, len,
10905 xfered_len, &remote_protocol_packets
10906 [PACKET_qXfer_spu_write]);
10909 /* Handle extra signal info using qxfer packets. */
10910 if (object == TARGET_OBJECT_SIGNAL_INFO)
10913 return remote_read_qxfer ("siginfo", annex, readbuf, offset, len,
10914 xfered_len, &remote_protocol_packets
10915 [PACKET_qXfer_siginfo_read]);
10917 return remote_write_qxfer ("siginfo", annex,
10918 writebuf, offset, len, xfered_len,
10919 &remote_protocol_packets
10920 [PACKET_qXfer_siginfo_write]);
10923 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
10926 return remote_read_qxfer ("statictrace", annex,
10927 readbuf, offset, len, xfered_len,
10928 &remote_protocol_packets
10929 [PACKET_qXfer_statictrace_read]);
10931 return TARGET_XFER_E_IO;
10934 /* Only handle flash writes. */
10935 if (writebuf != NULL)
10939 case TARGET_OBJECT_FLASH:
10940 return remote_flash_write (offset, len, xfered_len,
10944 return TARGET_XFER_E_IO;
10948 /* Map pre-existing objects onto letters. DO NOT do this for new
10949 objects!!! Instead specify new query packets. */
10952 case TARGET_OBJECT_AVR:
10956 case TARGET_OBJECT_AUXV:
10957 gdb_assert (annex == NULL);
10958 return remote_read_qxfer ("auxv", annex, readbuf, offset, len,
10960 &remote_protocol_packets[PACKET_qXfer_auxv]);
10962 case TARGET_OBJECT_AVAILABLE_FEATURES:
10963 return remote_read_qxfer
10964 ("features", annex, readbuf, offset, len, xfered_len,
10965 &remote_protocol_packets[PACKET_qXfer_features]);
10967 case TARGET_OBJECT_LIBRARIES:
10968 return remote_read_qxfer
10969 ("libraries", annex, readbuf, offset, len, xfered_len,
10970 &remote_protocol_packets[PACKET_qXfer_libraries]);
10972 case TARGET_OBJECT_LIBRARIES_SVR4:
10973 return remote_read_qxfer
10974 ("libraries-svr4", annex, readbuf, offset, len, xfered_len,
10975 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
10977 case TARGET_OBJECT_MEMORY_MAP:
10978 gdb_assert (annex == NULL);
10979 return remote_read_qxfer ("memory-map", annex, readbuf, offset, len,
10981 &remote_protocol_packets[PACKET_qXfer_memory_map]);
10983 case TARGET_OBJECT_OSDATA:
10984 /* Should only get here if we're connected. */
10985 gdb_assert (rs->remote_desc);
10986 return remote_read_qxfer
10987 ("osdata", annex, readbuf, offset, len, xfered_len,
10988 &remote_protocol_packets[PACKET_qXfer_osdata]);
10990 case TARGET_OBJECT_THREADS:
10991 gdb_assert (annex == NULL);
10992 return remote_read_qxfer ("threads", annex, readbuf, offset, len,
10994 &remote_protocol_packets[PACKET_qXfer_threads]);
10996 case TARGET_OBJECT_TRACEFRAME_INFO:
10997 gdb_assert (annex == NULL);
10998 return remote_read_qxfer
10999 ("traceframe-info", annex, readbuf, offset, len, xfered_len,
11000 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
11002 case TARGET_OBJECT_FDPIC:
11003 return remote_read_qxfer ("fdpic", annex, readbuf, offset, len,
11005 &remote_protocol_packets[PACKET_qXfer_fdpic]);
11007 case TARGET_OBJECT_OPENVMS_UIB:
11008 return remote_read_qxfer ("uib", annex, readbuf, offset, len,
11010 &remote_protocol_packets[PACKET_qXfer_uib]);
11012 case TARGET_OBJECT_BTRACE:
11013 return remote_read_qxfer ("btrace", annex, readbuf, offset, len,
11015 &remote_protocol_packets[PACKET_qXfer_btrace]);
11017 case TARGET_OBJECT_BTRACE_CONF:
11018 return remote_read_qxfer ("btrace-conf", annex, readbuf, offset,
11020 &remote_protocol_packets[PACKET_qXfer_btrace_conf]);
11022 case TARGET_OBJECT_EXEC_FILE:
11023 return remote_read_qxfer ("exec-file", annex, readbuf, offset,
11025 &remote_protocol_packets[PACKET_qXfer_exec_file]);
11028 return TARGET_XFER_E_IO;
11031 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11032 large enough let the caller deal with it. */
11033 if (len < get_remote_packet_size ())
11034 return TARGET_XFER_E_IO;
11035 len = get_remote_packet_size ();
11037 /* Except for querying the minimum buffer size, target must be open. */
11038 if (!rs->remote_desc)
11039 error (_("remote query is only available after target open"));
11041 gdb_assert (annex != NULL);
11042 gdb_assert (readbuf != NULL);
11044 p2 = rs->buf.data ();
11046 *p2++ = query_type;
11048 /* We used one buffer char for the remote protocol q command and
11049 another for the query type. As the remote protocol encapsulation
11050 uses 4 chars plus one extra in case we are debugging
11051 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11054 while (annex[i] && (i < (get_remote_packet_size () - 8)))
11056 /* Bad caller may have sent forbidden characters. */
11057 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
11062 gdb_assert (annex[i] == '\0');
11064 i = putpkt (rs->buf);
11066 return TARGET_XFER_E_IO;
11068 getpkt (&rs->buf, 0);
11069 strcpy ((char *) readbuf, rs->buf.data ());
11071 *xfered_len = strlen ((char *) readbuf);
11072 return (*xfered_len != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
11075 /* Implementation of to_get_memory_xfer_limit. */
11078 remote_target::get_memory_xfer_limit ()
11080 return get_memory_write_packet_size ();
11084 remote_target::search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
11085 const gdb_byte *pattern, ULONGEST pattern_len,
11086 CORE_ADDR *found_addrp)
11088 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
11089 struct remote_state *rs = get_remote_state ();
11090 int max_size = get_memory_write_packet_size ();
11091 struct packet_config *packet =
11092 &remote_protocol_packets[PACKET_qSearch_memory];
11093 /* Number of packet bytes used to encode the pattern;
11094 this could be more than PATTERN_LEN due to escape characters. */
11095 int escaped_pattern_len;
11096 /* Amount of pattern that was encodable in the packet. */
11097 int used_pattern_len;
11100 ULONGEST found_addr;
11102 /* Don't go to the target if we don't have to. This is done before
11103 checking packet_config_support to avoid the possibility that a
11104 success for this edge case means the facility works in
11106 if (pattern_len > search_space_len)
11108 if (pattern_len == 0)
11110 *found_addrp = start_addr;
11114 /* If we already know the packet isn't supported, fall back to the simple
11115 way of searching memory. */
11117 if (packet_config_support (packet) == PACKET_DISABLE)
11119 /* Target doesn't provided special support, fall back and use the
11120 standard support (copy memory and do the search here). */
11121 return simple_search_memory (this, start_addr, search_space_len,
11122 pattern, pattern_len, found_addrp);
11125 /* Make sure the remote is pointing at the right process. */
11126 set_general_process ();
11128 /* Insert header. */
11129 i = snprintf (rs->buf.data (), max_size,
11130 "qSearch:memory:%s;%s;",
11131 phex_nz (start_addr, addr_size),
11132 phex_nz (search_space_len, sizeof (search_space_len)));
11133 max_size -= (i + 1);
11135 /* Escape as much data as fits into rs->buf. */
11136 escaped_pattern_len =
11137 remote_escape_output (pattern, pattern_len, 1,
11138 (gdb_byte *) rs->buf.data () + i,
11139 &used_pattern_len, max_size);
11141 /* Bail if the pattern is too large. */
11142 if (used_pattern_len != pattern_len)
11143 error (_("Pattern is too large to transmit to remote target."));
11145 if (putpkt_binary (rs->buf.data (), i + escaped_pattern_len) < 0
11146 || getpkt_sane (&rs->buf, 0) < 0
11147 || packet_ok (rs->buf, packet) != PACKET_OK)
11149 /* The request may not have worked because the command is not
11150 supported. If so, fall back to the simple way. */
11151 if (packet_config_support (packet) == PACKET_DISABLE)
11153 return simple_search_memory (this, start_addr, search_space_len,
11154 pattern, pattern_len, found_addrp);
11159 if (rs->buf[0] == '0')
11161 else if (rs->buf[0] == '1')
11164 if (rs->buf[1] != ',')
11165 error (_("Unknown qSearch:memory reply: %s"), rs->buf.data ());
11166 unpack_varlen_hex (&rs->buf[2], &found_addr);
11167 *found_addrp = found_addr;
11170 error (_("Unknown qSearch:memory reply: %s"), rs->buf.data ());
11176 remote_target::rcmd (const char *command, struct ui_file *outbuf)
11178 struct remote_state *rs = get_remote_state ();
11179 char *p = rs->buf.data ();
11181 if (!rs->remote_desc)
11182 error (_("remote rcmd is only available after target open"));
11184 /* Send a NULL command across as an empty command. */
11185 if (command == NULL)
11188 /* The query prefix. */
11189 strcpy (rs->buf.data (), "qRcmd,");
11190 p = strchr (rs->buf.data (), '\0');
11192 if ((strlen (rs->buf.data ()) + strlen (command) * 2 + 8/*misc*/)
11193 > get_remote_packet_size ())
11194 error (_("\"monitor\" command ``%s'' is too long."), command);
11196 /* Encode the actual command. */
11197 bin2hex ((const gdb_byte *) command, p, strlen (command));
11199 if (putpkt (rs->buf) < 0)
11200 error (_("Communication problem with target."));
11202 /* get/display the response */
11207 /* XXX - see also remote_get_noisy_reply(). */
11208 QUIT; /* Allow user to bail out with ^C. */
11210 if (getpkt_sane (&rs->buf, 0) == -1)
11212 /* Timeout. Continue to (try to) read responses.
11213 This is better than stopping with an error, assuming the stub
11214 is still executing the (long) monitor command.
11215 If needed, the user can interrupt gdb using C-c, obtaining
11216 an effect similar to stop on timeout. */
11219 buf = rs->buf.data ();
11220 if (buf[0] == '\0')
11221 error (_("Target does not support this command."));
11222 if (buf[0] == 'O' && buf[1] != 'K')
11224 remote_console_output (buf + 1); /* 'O' message from stub. */
11227 if (strcmp (buf, "OK") == 0)
11229 if (strlen (buf) == 3 && buf[0] == 'E'
11230 && isdigit (buf[1]) && isdigit (buf[2]))
11232 error (_("Protocol error with Rcmd"));
11234 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
11236 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
11238 fputc_unfiltered (c, outbuf);
11244 std::vector<mem_region>
11245 remote_target::memory_map ()
11247 std::vector<mem_region> result;
11248 gdb::optional<gdb::char_vector> text
11249 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP, NULL);
11252 result = parse_memory_map (text->data ());
11258 packet_command (const char *args, int from_tty)
11260 remote_target *remote = get_current_remote_target ();
11262 if (remote == nullptr)
11263 error (_("command can only be used with remote target"));
11265 remote->packet_command (args, from_tty);
11269 remote_target::packet_command (const char *args, int from_tty)
11272 error (_("remote-packet command requires packet text as argument"));
11274 puts_filtered ("sending: ");
11275 print_packet (args);
11276 puts_filtered ("\n");
11279 remote_state *rs = get_remote_state ();
11281 getpkt (&rs->buf, 0);
11282 puts_filtered ("received: ");
11283 print_packet (rs->buf.data ());
11284 puts_filtered ("\n");
11288 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11290 static void display_thread_info (struct gdb_ext_thread_info *info);
11292 static void threadset_test_cmd (char *cmd, int tty);
11294 static void threadalive_test (char *cmd, int tty);
11296 static void threadlist_test_cmd (char *cmd, int tty);
11298 int get_and_display_threadinfo (threadref *ref);
11300 static void threadinfo_test_cmd (char *cmd, int tty);
11302 static int thread_display_step (threadref *ref, void *context);
11304 static void threadlist_update_test_cmd (char *cmd, int tty);
11306 static void init_remote_threadtests (void);
11308 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11311 threadset_test_cmd (const char *cmd, int tty)
11313 int sample_thread = SAMPLE_THREAD;
11315 printf_filtered (_("Remote threadset test\n"));
11316 set_general_thread (sample_thread);
11321 threadalive_test (const char *cmd, int tty)
11323 int sample_thread = SAMPLE_THREAD;
11324 int pid = inferior_ptid.pid ();
11325 ptid_t ptid = ptid_t (pid, sample_thread, 0);
11327 if (remote_thread_alive (ptid))
11328 printf_filtered ("PASS: Thread alive test\n");
11330 printf_filtered ("FAIL: Thread alive test\n");
11333 void output_threadid (char *title, threadref *ref);
11336 output_threadid (char *title, threadref *ref)
11340 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
11342 printf_filtered ("%s %s\n", title, (&hexid[0]));
11346 threadlist_test_cmd (const char *cmd, int tty)
11349 threadref nextthread;
11350 int done, result_count;
11351 threadref threadlist[3];
11353 printf_filtered ("Remote Threadlist test\n");
11354 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
11355 &result_count, &threadlist[0]))
11356 printf_filtered ("FAIL: threadlist test\n");
11359 threadref *scan = threadlist;
11360 threadref *limit = scan + result_count;
11362 while (scan < limit)
11363 output_threadid (" thread ", scan++);
11368 display_thread_info (struct gdb_ext_thread_info *info)
11370 output_threadid ("Threadid: ", &info->threadid);
11371 printf_filtered ("Name: %s\n ", info->shortname);
11372 printf_filtered ("State: %s\n", info->display);
11373 printf_filtered ("other: %s\n\n", info->more_display);
11377 get_and_display_threadinfo (threadref *ref)
11381 struct gdb_ext_thread_info threadinfo;
11383 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
11384 | TAG_MOREDISPLAY | TAG_DISPLAY;
11385 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
11386 display_thread_info (&threadinfo);
11391 threadinfo_test_cmd (const char *cmd, int tty)
11393 int athread = SAMPLE_THREAD;
11397 int_to_threadref (&thread, athread);
11398 printf_filtered ("Remote Threadinfo test\n");
11399 if (!get_and_display_threadinfo (&thread))
11400 printf_filtered ("FAIL cannot get thread info\n");
11404 thread_display_step (threadref *ref, void *context)
11406 /* output_threadid(" threadstep ",ref); *//* simple test */
11407 return get_and_display_threadinfo (ref);
11411 threadlist_update_test_cmd (const char *cmd, int tty)
11413 printf_filtered ("Remote Threadlist update test\n");
11414 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
11418 init_remote_threadtests (void)
11420 add_com ("tlist", class_obscure, threadlist_test_cmd,
11421 _("Fetch and print the remote list of "
11422 "thread identifiers, one pkt only"));
11423 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
11424 _("Fetch and display info about one thread"));
11425 add_com ("tset", class_obscure, threadset_test_cmd,
11426 _("Test setting to a different thread"));
11427 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
11428 _("Iterate through updating all remote thread info"));
11429 add_com ("talive", class_obscure, threadalive_test,
11430 _(" Remote thread alive test "));
11435 /* Convert a thread ID to a string. Returns the string in a static
11439 remote_target::pid_to_str (ptid_t ptid)
11441 static char buf[64];
11442 struct remote_state *rs = get_remote_state ();
11444 if (ptid == null_ptid)
11445 return normal_pid_to_str (ptid);
11446 else if (ptid.is_pid ())
11448 /* Printing an inferior target id. */
11450 /* When multi-process extensions are off, there's no way in the
11451 remote protocol to know the remote process id, if there's any
11452 at all. There's one exception --- when we're connected with
11453 target extended-remote, and we manually attached to a process
11454 with "attach PID". We don't record anywhere a flag that
11455 allows us to distinguish that case from the case of
11456 connecting with extended-remote and the stub already being
11457 attached to a process, and reporting yes to qAttached, hence
11458 no smart special casing here. */
11459 if (!remote_multi_process_p (rs))
11461 xsnprintf (buf, sizeof buf, "Remote target");
11465 return normal_pid_to_str (ptid);
11469 if (magic_null_ptid == ptid)
11470 xsnprintf (buf, sizeof buf, "Thread <main>");
11471 else if (remote_multi_process_p (rs))
11472 if (ptid.lwp () == 0)
11473 return normal_pid_to_str (ptid);
11475 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
11476 ptid.pid (), ptid.lwp ());
11478 xsnprintf (buf, sizeof buf, "Thread %ld",
11484 /* Get the address of the thread local variable in OBJFILE which is
11485 stored at OFFSET within the thread local storage for thread PTID. */
11488 remote_target::get_thread_local_address (ptid_t ptid, CORE_ADDR lm,
11491 if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE)
11493 struct remote_state *rs = get_remote_state ();
11494 char *p = rs->buf.data ();
11495 char *endp = p + get_remote_packet_size ();
11496 enum packet_result result;
11498 strcpy (p, "qGetTLSAddr:");
11500 p = write_ptid (p, endp, ptid);
11502 p += hexnumstr (p, offset);
11504 p += hexnumstr (p, lm);
11508 getpkt (&rs->buf, 0);
11509 result = packet_ok (rs->buf,
11510 &remote_protocol_packets[PACKET_qGetTLSAddr]);
11511 if (result == PACKET_OK)
11515 unpack_varlen_hex (rs->buf.data (), &addr);
11518 else if (result == PACKET_UNKNOWN)
11519 throw_error (TLS_GENERIC_ERROR,
11520 _("Remote target doesn't support qGetTLSAddr packet"));
11522 throw_error (TLS_GENERIC_ERROR,
11523 _("Remote target failed to process qGetTLSAddr request"));
11526 throw_error (TLS_GENERIC_ERROR,
11527 _("TLS not supported or disabled on this target"));
11532 /* Provide thread local base, i.e. Thread Information Block address.
11533 Returns 1 if ptid is found and thread_local_base is non zero. */
11536 remote_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr)
11538 if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE)
11540 struct remote_state *rs = get_remote_state ();
11541 char *p = rs->buf.data ();
11542 char *endp = p + get_remote_packet_size ();
11543 enum packet_result result;
11545 strcpy (p, "qGetTIBAddr:");
11547 p = write_ptid (p, endp, ptid);
11551 getpkt (&rs->buf, 0);
11552 result = packet_ok (rs->buf,
11553 &remote_protocol_packets[PACKET_qGetTIBAddr]);
11554 if (result == PACKET_OK)
11557 unpack_varlen_hex (rs->buf.data (), &val);
11559 *addr = (CORE_ADDR) val;
11562 else if (result == PACKET_UNKNOWN)
11563 error (_("Remote target doesn't support qGetTIBAddr packet"));
11565 error (_("Remote target failed to process qGetTIBAddr request"));
11568 error (_("qGetTIBAddr not supported or disabled on this target"));
11573 /* Support for inferring a target description based on the current
11574 architecture and the size of a 'g' packet. While the 'g' packet
11575 can have any size (since optional registers can be left off the
11576 end), some sizes are easily recognizable given knowledge of the
11577 approximate architecture. */
11579 struct remote_g_packet_guess
11581 remote_g_packet_guess (int bytes_, const struct target_desc *tdesc_)
11588 const struct target_desc *tdesc;
11591 struct remote_g_packet_data : public allocate_on_obstack
11593 std::vector<remote_g_packet_guess> guesses;
11596 static struct gdbarch_data *remote_g_packet_data_handle;
11599 remote_g_packet_data_init (struct obstack *obstack)
11601 return new (obstack) remote_g_packet_data;
11605 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
11606 const struct target_desc *tdesc)
11608 struct remote_g_packet_data *data
11609 = ((struct remote_g_packet_data *)
11610 gdbarch_data (gdbarch, remote_g_packet_data_handle));
11612 gdb_assert (tdesc != NULL);
11614 for (const remote_g_packet_guess &guess : data->guesses)
11615 if (guess.bytes == bytes)
11616 internal_error (__FILE__, __LINE__,
11617 _("Duplicate g packet description added for size %d"),
11620 data->guesses.emplace_back (bytes, tdesc);
11623 /* Return true if remote_read_description would do anything on this target
11624 and architecture, false otherwise. */
11627 remote_read_description_p (struct target_ops *target)
11629 struct remote_g_packet_data *data
11630 = ((struct remote_g_packet_data *)
11631 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
11633 return !data->guesses.empty ();
11636 const struct target_desc *
11637 remote_target::read_description ()
11639 struct remote_g_packet_data *data
11640 = ((struct remote_g_packet_data *)
11641 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
11643 /* Do not try this during initial connection, when we do not know
11644 whether there is a running but stopped thread. */
11645 if (!target_has_execution || inferior_ptid == null_ptid)
11646 return beneath ()->read_description ();
11648 if (!data->guesses.empty ())
11650 int bytes = send_g_packet ();
11652 for (const remote_g_packet_guess &guess : data->guesses)
11653 if (guess.bytes == bytes)
11654 return guess.tdesc;
11656 /* We discard the g packet. A minor optimization would be to
11657 hold on to it, and fill the register cache once we have selected
11658 an architecture, but it's too tricky to do safely. */
11661 return beneath ()->read_description ();
11664 /* Remote file transfer support. This is host-initiated I/O, not
11665 target-initiated; for target-initiated, see remote-fileio.c. */
11667 /* If *LEFT is at least the length of STRING, copy STRING to
11668 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11669 decrease *LEFT. Otherwise raise an error. */
11672 remote_buffer_add_string (char **buffer, int *left, const char *string)
11674 int len = strlen (string);
11677 error (_("Packet too long for target."));
11679 memcpy (*buffer, string, len);
11683 /* NUL-terminate the buffer as a convenience, if there is
11689 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11690 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11691 decrease *LEFT. Otherwise raise an error. */
11694 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
11697 if (2 * len > *left)
11698 error (_("Packet too long for target."));
11700 bin2hex (bytes, *buffer, len);
11701 *buffer += 2 * len;
11704 /* NUL-terminate the buffer as a convenience, if there is
11710 /* If *LEFT is large enough, convert VALUE to hex and add it to
11711 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11712 decrease *LEFT. Otherwise raise an error. */
11715 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
11717 int len = hexnumlen (value);
11720 error (_("Packet too long for target."));
11722 hexnumstr (*buffer, value);
11726 /* NUL-terminate the buffer as a convenience, if there is
11732 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11733 value, *REMOTE_ERRNO to the remote error number or zero if none
11734 was included, and *ATTACHMENT to point to the start of the annex
11735 if any. The length of the packet isn't needed here; there may
11736 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11738 Return 0 if the packet could be parsed, -1 if it could not. If
11739 -1 is returned, the other variables may not be initialized. */
11742 remote_hostio_parse_result (char *buffer, int *retcode,
11743 int *remote_errno, char **attachment)
11748 *attachment = NULL;
11750 if (buffer[0] != 'F')
11754 *retcode = strtol (&buffer[1], &p, 16);
11755 if (errno != 0 || p == &buffer[1])
11758 /* Check for ",errno". */
11762 *remote_errno = strtol (p + 1, &p2, 16);
11763 if (errno != 0 || p + 1 == p2)
11768 /* Check for ";attachment". If there is no attachment, the
11769 packet should end here. */
11772 *attachment = p + 1;
11775 else if (*p == '\0')
11781 /* Send a prepared I/O packet to the target and read its response.
11782 The prepared packet is in the global RS->BUF before this function
11783 is called, and the answer is there when we return.
11785 COMMAND_BYTES is the length of the request to send, which may include
11786 binary data. WHICH_PACKET is the packet configuration to check
11787 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11788 is set to the error number and -1 is returned. Otherwise the value
11789 returned by the function is returned.
11791 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11792 attachment is expected; an error will be reported if there's a
11793 mismatch. If one is found, *ATTACHMENT will be set to point into
11794 the packet buffer and *ATTACHMENT_LEN will be set to the
11795 attachment's length. */
11798 remote_target::remote_hostio_send_command (int command_bytes, int which_packet,
11799 int *remote_errno, char **attachment,
11800 int *attachment_len)
11802 struct remote_state *rs = get_remote_state ();
11803 int ret, bytes_read;
11804 char *attachment_tmp;
11806 if (packet_support (which_packet) == PACKET_DISABLE)
11808 *remote_errno = FILEIO_ENOSYS;
11812 putpkt_binary (rs->buf.data (), command_bytes);
11813 bytes_read = getpkt_sane (&rs->buf, 0);
11815 /* If it timed out, something is wrong. Don't try to parse the
11817 if (bytes_read < 0)
11819 *remote_errno = FILEIO_EINVAL;
11823 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
11826 *remote_errno = FILEIO_EINVAL;
11828 case PACKET_UNKNOWN:
11829 *remote_errno = FILEIO_ENOSYS;
11835 if (remote_hostio_parse_result (rs->buf.data (), &ret, remote_errno,
11838 *remote_errno = FILEIO_EINVAL;
11842 /* Make sure we saw an attachment if and only if we expected one. */
11843 if ((attachment_tmp == NULL && attachment != NULL)
11844 || (attachment_tmp != NULL && attachment == NULL))
11846 *remote_errno = FILEIO_EINVAL;
11850 /* If an attachment was found, it must point into the packet buffer;
11851 work out how many bytes there were. */
11852 if (attachment_tmp != NULL)
11854 *attachment = attachment_tmp;
11855 *attachment_len = bytes_read - (*attachment - rs->buf.data ());
11861 /* See declaration.h. */
11864 readahead_cache::invalidate ()
11869 /* See declaration.h. */
11872 readahead_cache::invalidate_fd (int fd)
11874 if (this->fd == fd)
11878 /* Set the filesystem remote_hostio functions that take FILENAME
11879 arguments will use. Return 0 on success, or -1 if an error
11880 occurs (and set *REMOTE_ERRNO). */
11883 remote_target::remote_hostio_set_filesystem (struct inferior *inf,
11886 struct remote_state *rs = get_remote_state ();
11887 int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid;
11888 char *p = rs->buf.data ();
11889 int left = get_remote_packet_size () - 1;
11893 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11896 if (rs->fs_pid != -1 && required_pid == rs->fs_pid)
11899 remote_buffer_add_string (&p, &left, "vFile:setfs:");
11901 xsnprintf (arg, sizeof (arg), "%x", required_pid);
11902 remote_buffer_add_string (&p, &left, arg);
11904 ret = remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_setfs,
11905 remote_errno, NULL, NULL);
11907 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11911 rs->fs_pid = required_pid;
11916 /* Implementation of to_fileio_open. */
11919 remote_target::remote_hostio_open (inferior *inf, const char *filename,
11920 int flags, int mode, int warn_if_slow,
11923 struct remote_state *rs = get_remote_state ();
11924 char *p = rs->buf.data ();
11925 int left = get_remote_packet_size () - 1;
11929 static int warning_issued = 0;
11931 printf_unfiltered (_("Reading %s from remote target...\n"),
11934 if (!warning_issued)
11936 warning (_("File transfers from remote targets can be slow."
11937 " Use \"set sysroot\" to access files locally"
11939 warning_issued = 1;
11943 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11946 remote_buffer_add_string (&p, &left, "vFile:open:");
11948 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11949 strlen (filename));
11950 remote_buffer_add_string (&p, &left, ",");
11952 remote_buffer_add_int (&p, &left, flags);
11953 remote_buffer_add_string (&p, &left, ",");
11955 remote_buffer_add_int (&p, &left, mode);
11957 return remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_open,
11958 remote_errno, NULL, NULL);
11962 remote_target::fileio_open (struct inferior *inf, const char *filename,
11963 int flags, int mode, int warn_if_slow,
11966 return remote_hostio_open (inf, filename, flags, mode, warn_if_slow,
11970 /* Implementation of to_fileio_pwrite. */
11973 remote_target::remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
11974 ULONGEST offset, int *remote_errno)
11976 struct remote_state *rs = get_remote_state ();
11977 char *p = rs->buf.data ();
11978 int left = get_remote_packet_size ();
11981 rs->readahead_cache.invalidate_fd (fd);
11983 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
11985 remote_buffer_add_int (&p, &left, fd);
11986 remote_buffer_add_string (&p, &left, ",");
11988 remote_buffer_add_int (&p, &left, offset);
11989 remote_buffer_add_string (&p, &left, ",");
11991 p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len,
11992 (get_remote_packet_size ()
11993 - (p - rs->buf.data ())));
11995 return remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_pwrite,
11996 remote_errno, NULL, NULL);
12000 remote_target::fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
12001 ULONGEST offset, int *remote_errno)
12003 return remote_hostio_pwrite (fd, write_buf, len, offset, remote_errno);
12006 /* Helper for the implementation of to_fileio_pread. Read the file
12007 from the remote side with vFile:pread. */
12010 remote_target::remote_hostio_pread_vFile (int fd, gdb_byte *read_buf, int len,
12011 ULONGEST offset, int *remote_errno)
12013 struct remote_state *rs = get_remote_state ();
12014 char *p = rs->buf.data ();
12016 int left = get_remote_packet_size ();
12017 int ret, attachment_len;
12020 remote_buffer_add_string (&p, &left, "vFile:pread:");
12022 remote_buffer_add_int (&p, &left, fd);
12023 remote_buffer_add_string (&p, &left, ",");
12025 remote_buffer_add_int (&p, &left, len);
12026 remote_buffer_add_string (&p, &left, ",");
12028 remote_buffer_add_int (&p, &left, offset);
12030 ret = remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_pread,
12031 remote_errno, &attachment,
12037 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
12039 if (read_len != ret)
12040 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
12045 /* See declaration.h. */
12048 readahead_cache::pread (int fd, gdb_byte *read_buf, size_t len,
12052 && this->offset <= offset
12053 && offset < this->offset + this->bufsize)
12055 ULONGEST max = this->offset + this->bufsize;
12057 if (offset + len > max)
12058 len = max - offset;
12060 memcpy (read_buf, this->buf + offset - this->offset, len);
12067 /* Implementation of to_fileio_pread. */
12070 remote_target::remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
12071 ULONGEST offset, int *remote_errno)
12074 struct remote_state *rs = get_remote_state ();
12075 readahead_cache *cache = &rs->readahead_cache;
12077 ret = cache->pread (fd, read_buf, len, offset);
12080 cache->hit_count++;
12083 fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n",
12084 pulongest (cache->hit_count));
12088 cache->miss_count++;
12090 fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n",
12091 pulongest (cache->miss_count));
12094 cache->offset = offset;
12095 cache->bufsize = get_remote_packet_size ();
12096 cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize);
12098 ret = remote_hostio_pread_vFile (cache->fd, cache->buf, cache->bufsize,
12099 cache->offset, remote_errno);
12102 cache->invalidate_fd (fd);
12106 cache->bufsize = ret;
12107 return cache->pread (fd, read_buf, len, offset);
12111 remote_target::fileio_pread (int fd, gdb_byte *read_buf, int len,
12112 ULONGEST offset, int *remote_errno)
12114 return remote_hostio_pread (fd, read_buf, len, offset, remote_errno);
12117 /* Implementation of to_fileio_close. */
12120 remote_target::remote_hostio_close (int fd, int *remote_errno)
12122 struct remote_state *rs = get_remote_state ();
12123 char *p = rs->buf.data ();
12124 int left = get_remote_packet_size () - 1;
12126 rs->readahead_cache.invalidate_fd (fd);
12128 remote_buffer_add_string (&p, &left, "vFile:close:");
12130 remote_buffer_add_int (&p, &left, fd);
12132 return remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_close,
12133 remote_errno, NULL, NULL);
12137 remote_target::fileio_close (int fd, int *remote_errno)
12139 return remote_hostio_close (fd, remote_errno);
12142 /* Implementation of to_fileio_unlink. */
12145 remote_target::remote_hostio_unlink (inferior *inf, const char *filename,
12148 struct remote_state *rs = get_remote_state ();
12149 char *p = rs->buf.data ();
12150 int left = get_remote_packet_size () - 1;
12152 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
12155 remote_buffer_add_string (&p, &left, "vFile:unlink:");
12157 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
12158 strlen (filename));
12160 return remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_unlink,
12161 remote_errno, NULL, NULL);
12165 remote_target::fileio_unlink (struct inferior *inf, const char *filename,
12168 return remote_hostio_unlink (inf, filename, remote_errno);
12171 /* Implementation of to_fileio_readlink. */
12173 gdb::optional<std::string>
12174 remote_target::fileio_readlink (struct inferior *inf, const char *filename,
12177 struct remote_state *rs = get_remote_state ();
12178 char *p = rs->buf.data ();
12180 int left = get_remote_packet_size ();
12181 int len, attachment_len;
12184 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
12187 remote_buffer_add_string (&p, &left, "vFile:readlink:");
12189 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
12190 strlen (filename));
12192 len = remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_readlink,
12193 remote_errno, &attachment,
12199 std::string ret (len, '\0');
12201 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
12202 (gdb_byte *) &ret[0], len);
12203 if (read_len != len)
12204 error (_("Readlink returned %d, but %d bytes."), len, read_len);
12209 /* Implementation of to_fileio_fstat. */
12212 remote_target::fileio_fstat (int fd, struct stat *st, int *remote_errno)
12214 struct remote_state *rs = get_remote_state ();
12215 char *p = rs->buf.data ();
12216 int left = get_remote_packet_size ();
12217 int attachment_len, ret;
12219 struct fio_stat fst;
12222 remote_buffer_add_string (&p, &left, "vFile:fstat:");
12224 remote_buffer_add_int (&p, &left, fd);
12226 ret = remote_hostio_send_command (p - rs->buf.data (), PACKET_vFile_fstat,
12227 remote_errno, &attachment,
12231 if (*remote_errno != FILEIO_ENOSYS)
12234 /* Strictly we should return -1, ENOSYS here, but when
12235 "set sysroot remote:" was implemented in August 2008
12236 BFD's need for a stat function was sidestepped with
12237 this hack. This was not remedied until March 2015
12238 so we retain the previous behavior to avoid breaking
12241 Note that the memset is a March 2015 addition; older
12242 GDBs set st_size *and nothing else* so the structure
12243 would have garbage in all other fields. This might
12244 break something but retaining the previous behavior
12245 here would be just too wrong. */
12247 memset (st, 0, sizeof (struct stat));
12248 st->st_size = INT_MAX;
12252 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
12253 (gdb_byte *) &fst, sizeof (fst));
12255 if (read_len != ret)
12256 error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len);
12258 if (read_len != sizeof (fst))
12259 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12260 read_len, (int) sizeof (fst));
12262 remote_fileio_to_host_stat (&fst, st);
12267 /* Implementation of to_filesystem_is_local. */
12270 remote_target::filesystem_is_local ()
12272 /* Valgrind GDB presents itself as a remote target but works
12273 on the local filesystem: it does not implement remote get
12274 and users are not expected to set a sysroot. To handle
12275 this case we treat the remote filesystem as local if the
12276 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12277 does not support vFile:open. */
12278 if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0)
12280 enum packet_support ps = packet_support (PACKET_vFile_open);
12282 if (ps == PACKET_SUPPORT_UNKNOWN)
12284 int fd, remote_errno;
12286 /* Try opening a file to probe support. The supplied
12287 filename is irrelevant, we only care about whether
12288 the stub recognizes the packet or not. */
12289 fd = remote_hostio_open (NULL, "just probing",
12290 FILEIO_O_RDONLY, 0700, 0,
12294 remote_hostio_close (fd, &remote_errno);
12296 ps = packet_support (PACKET_vFile_open);
12299 if (ps == PACKET_DISABLE)
12301 static int warning_issued = 0;
12303 if (!warning_issued)
12305 warning (_("remote target does not support file"
12306 " transfer, attempting to access files"
12307 " from local filesystem."));
12308 warning_issued = 1;
12319 remote_fileio_errno_to_host (int errnum)
12325 case FILEIO_ENOENT:
12333 case FILEIO_EACCES:
12335 case FILEIO_EFAULT:
12339 case FILEIO_EEXIST:
12341 case FILEIO_ENODEV:
12343 case FILEIO_ENOTDIR:
12345 case FILEIO_EISDIR:
12347 case FILEIO_EINVAL:
12349 case FILEIO_ENFILE:
12351 case FILEIO_EMFILE:
12355 case FILEIO_ENOSPC:
12357 case FILEIO_ESPIPE:
12361 case FILEIO_ENOSYS:
12363 case FILEIO_ENAMETOOLONG:
12364 return ENAMETOOLONG;
12370 remote_hostio_error (int errnum)
12372 int host_error = remote_fileio_errno_to_host (errnum);
12374 if (host_error == -1)
12375 error (_("Unknown remote I/O error %d"), errnum);
12377 error (_("Remote I/O error: %s"), safe_strerror (host_error));
12380 /* A RAII wrapper around a remote file descriptor. */
12382 class scoped_remote_fd
12385 scoped_remote_fd (remote_target *remote, int fd)
12386 : m_remote (remote), m_fd (fd)
12390 ~scoped_remote_fd ()
12397 m_remote->remote_hostio_close (m_fd, &remote_errno);
12401 /* Swallow exception before it escapes the dtor. If
12402 something goes wrong, likely the connection is gone,
12403 and there's nothing else that can be done. */
12408 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd);
12410 /* Release ownership of the file descriptor, and return it. */
12411 ATTRIBUTE_UNUSED_RESULT int release () noexcept
12418 /* Return the owned file descriptor. */
12419 int get () const noexcept
12425 /* The remote target. */
12426 remote_target *m_remote;
12428 /* The owned remote I/O file descriptor. */
12433 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
12435 remote_target *remote = get_current_remote_target ();
12437 if (remote == nullptr)
12438 error (_("command can only be used with remote target"));
12440 remote->remote_file_put (local_file, remote_file, from_tty);
12444 remote_target::remote_file_put (const char *local_file, const char *remote_file,
12447 int retcode, remote_errno, bytes, io_size;
12448 int bytes_in_buffer;
12452 gdb_file_up file = gdb_fopen_cloexec (local_file, "rb");
12454 perror_with_name (local_file);
12456 scoped_remote_fd fd
12457 (this, remote_hostio_open (NULL,
12458 remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
12460 0700, 0, &remote_errno));
12461 if (fd.get () == -1)
12462 remote_hostio_error (remote_errno);
12464 /* Send up to this many bytes at once. They won't all fit in the
12465 remote packet limit, so we'll transfer slightly fewer. */
12466 io_size = get_remote_packet_size ();
12467 gdb::byte_vector buffer (io_size);
12469 bytes_in_buffer = 0;
12472 while (bytes_in_buffer || !saw_eof)
12476 bytes = fread (buffer.data () + bytes_in_buffer, 1,
12477 io_size - bytes_in_buffer,
12481 if (ferror (file.get ()))
12482 error (_("Error reading %s."), local_file);
12485 /* EOF. Unless there is something still in the
12486 buffer from the last iteration, we are done. */
12488 if (bytes_in_buffer == 0)
12496 bytes += bytes_in_buffer;
12497 bytes_in_buffer = 0;
12499 retcode = remote_hostio_pwrite (fd.get (), buffer.data (), bytes,
12500 offset, &remote_errno);
12503 remote_hostio_error (remote_errno);
12504 else if (retcode == 0)
12505 error (_("Remote write of %d bytes returned 0!"), bytes);
12506 else if (retcode < bytes)
12508 /* Short write. Save the rest of the read data for the next
12510 bytes_in_buffer = bytes - retcode;
12511 memmove (buffer.data (), buffer.data () + retcode, bytes_in_buffer);
12517 if (remote_hostio_close (fd.release (), &remote_errno))
12518 remote_hostio_error (remote_errno);
12521 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
12525 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
12527 remote_target *remote = get_current_remote_target ();
12529 if (remote == nullptr)
12530 error (_("command can only be used with remote target"));
12532 remote->remote_file_get (remote_file, local_file, from_tty);
12536 remote_target::remote_file_get (const char *remote_file, const char *local_file,
12539 int remote_errno, bytes, io_size;
12542 scoped_remote_fd fd
12543 (this, remote_hostio_open (NULL,
12544 remote_file, FILEIO_O_RDONLY, 0, 0,
12546 if (fd.get () == -1)
12547 remote_hostio_error (remote_errno);
12549 gdb_file_up file = gdb_fopen_cloexec (local_file, "wb");
12551 perror_with_name (local_file);
12553 /* Send up to this many bytes at once. They won't all fit in the
12554 remote packet limit, so we'll transfer slightly fewer. */
12555 io_size = get_remote_packet_size ();
12556 gdb::byte_vector buffer (io_size);
12561 bytes = remote_hostio_pread (fd.get (), buffer.data (), io_size, offset,
12564 /* Success, but no bytes, means end-of-file. */
12567 remote_hostio_error (remote_errno);
12571 bytes = fwrite (buffer.data (), 1, bytes, file.get ());
12573 perror_with_name (local_file);
12576 if (remote_hostio_close (fd.release (), &remote_errno))
12577 remote_hostio_error (remote_errno);
12580 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
12584 remote_file_delete (const char *remote_file, int from_tty)
12586 remote_target *remote = get_current_remote_target ();
12588 if (remote == nullptr)
12589 error (_("command can only be used with remote target"));
12591 remote->remote_file_delete (remote_file, from_tty);
12595 remote_target::remote_file_delete (const char *remote_file, int from_tty)
12597 int retcode, remote_errno;
12599 retcode = remote_hostio_unlink (NULL, remote_file, &remote_errno);
12601 remote_hostio_error (remote_errno);
12604 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
12608 remote_put_command (const char *args, int from_tty)
12611 error_no_arg (_("file to put"));
12613 gdb_argv argv (args);
12614 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
12615 error (_("Invalid parameters to remote put"));
12617 remote_file_put (argv[0], argv[1], from_tty);
12621 remote_get_command (const char *args, int from_tty)
12624 error_no_arg (_("file to get"));
12626 gdb_argv argv (args);
12627 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
12628 error (_("Invalid parameters to remote get"));
12630 remote_file_get (argv[0], argv[1], from_tty);
12634 remote_delete_command (const char *args, int from_tty)
12637 error_no_arg (_("file to delete"));
12639 gdb_argv argv (args);
12640 if (argv[0] == NULL || argv[1] != NULL)
12641 error (_("Invalid parameters to remote delete"));
12643 remote_file_delete (argv[0], from_tty);
12647 remote_command (const char *args, int from_tty)
12649 help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout);
12653 remote_target::can_execute_reverse ()
12655 if (packet_support (PACKET_bs) == PACKET_ENABLE
12656 || packet_support (PACKET_bc) == PACKET_ENABLE)
12663 remote_target::supports_non_stop ()
12669 remote_target::supports_disable_randomization ()
12671 /* Only supported in extended mode. */
12676 remote_target::supports_multi_process ()
12678 struct remote_state *rs = get_remote_state ();
12680 return remote_multi_process_p (rs);
12684 remote_supports_cond_tracepoints ()
12686 return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE;
12690 remote_target::supports_evaluation_of_breakpoint_conditions ()
12692 return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE;
12696 remote_supports_fast_tracepoints ()
12698 return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE;
12702 remote_supports_static_tracepoints ()
12704 return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE;
12708 remote_supports_install_in_trace ()
12710 return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE;
12714 remote_target::supports_enable_disable_tracepoint ()
12716 return (packet_support (PACKET_EnableDisableTracepoints_feature)
12721 remote_target::supports_string_tracing ()
12723 return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE;
12727 remote_target::can_run_breakpoint_commands ()
12729 return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE;
12733 remote_target::trace_init ()
12735 struct remote_state *rs = get_remote_state ();
12738 remote_get_noisy_reply ();
12739 if (strcmp (rs->buf.data (), "OK") != 0)
12740 error (_("Target does not support this command."));
12743 /* Recursive routine to walk through command list including loops, and
12744 download packets for each command. */
12747 remote_target::remote_download_command_source (int num, ULONGEST addr,
12748 struct command_line *cmds)
12750 struct remote_state *rs = get_remote_state ();
12751 struct command_line *cmd;
12753 for (cmd = cmds; cmd; cmd = cmd->next)
12755 QUIT; /* Allow user to bail out with ^C. */
12756 strcpy (rs->buf.data (), "QTDPsrc:");
12757 encode_source_string (num, addr, "cmd", cmd->line,
12758 rs->buf.data () + strlen (rs->buf.data ()),
12759 rs->buf.size () - strlen (rs->buf.data ()));
12761 remote_get_noisy_reply ();
12762 if (strcmp (rs->buf.data (), "OK"))
12763 warning (_("Target does not support source download."));
12765 if (cmd->control_type == while_control
12766 || cmd->control_type == while_stepping_control)
12768 remote_download_command_source (num, addr, cmd->body_list_0.get ());
12770 QUIT; /* Allow user to bail out with ^C. */
12771 strcpy (rs->buf.data (), "QTDPsrc:");
12772 encode_source_string (num, addr, "cmd", "end",
12773 rs->buf.data () + strlen (rs->buf.data ()),
12774 rs->buf.size () - strlen (rs->buf.data ()));
12776 remote_get_noisy_reply ();
12777 if (strcmp (rs->buf.data (), "OK"))
12778 warning (_("Target does not support source download."));
12784 remote_target::download_tracepoint (struct bp_location *loc)
12788 std::vector<std::string> tdp_actions;
12789 std::vector<std::string> stepping_actions;
12791 struct breakpoint *b = loc->owner;
12792 struct tracepoint *t = (struct tracepoint *) b;
12793 struct remote_state *rs = get_remote_state ();
12795 const char *err_msg = _("Tracepoint packet too large for target.");
12798 /* We use a buffer other than rs->buf because we'll build strings
12799 across multiple statements, and other statements in between could
12801 gdb::char_vector buf (get_remote_packet_size ());
12803 encode_actions_rsp (loc, &tdp_actions, &stepping_actions);
12805 tpaddr = loc->address;
12806 sprintf_vma (addrbuf, tpaddr);
12807 ret = snprintf (buf.data (), buf.size (), "QTDP:%x:%s:%c:%lx:%x",
12808 b->number, addrbuf, /* address */
12809 (b->enable_state == bp_enabled ? 'E' : 'D'),
12810 t->step_count, t->pass_count);
12812 if (ret < 0 || ret >= buf.size ())
12813 error ("%s", err_msg);
12815 /* Fast tracepoints are mostly handled by the target, but we can
12816 tell the target how big of an instruction block should be moved
12818 if (b->type == bp_fast_tracepoint)
12820 /* Only test for support at download time; we may not know
12821 target capabilities at definition time. */
12822 if (remote_supports_fast_tracepoints ())
12824 if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr,
12827 size_left = buf.size () - strlen (buf.data ());
12828 ret = snprintf (buf.data () + strlen (buf.data ()),
12830 gdb_insn_length (loc->gdbarch, tpaddr));
12832 if (ret < 0 || ret >= size_left)
12833 error ("%s", err_msg);
12836 /* If it passed validation at definition but fails now,
12837 something is very wrong. */
12838 internal_error (__FILE__, __LINE__,
12839 _("Fast tracepoint not "
12840 "valid during download"));
12843 /* Fast tracepoints are functionally identical to regular
12844 tracepoints, so don't take lack of support as a reason to
12845 give up on the trace run. */
12846 warning (_("Target does not support fast tracepoints, "
12847 "downloading %d as regular tracepoint"), b->number);
12849 else if (b->type == bp_static_tracepoint)
12851 /* Only test for support at download time; we may not know
12852 target capabilities at definition time. */
12853 if (remote_supports_static_tracepoints ())
12855 struct static_tracepoint_marker marker;
12857 if (target_static_tracepoint_marker_at (tpaddr, &marker))
12859 size_left = buf.size () - strlen (buf.data ());
12860 ret = snprintf (buf.data () + strlen (buf.data ()),
12863 if (ret < 0 || ret >= size_left)
12864 error ("%s", err_msg);
12867 error (_("Static tracepoint not valid during download"));
12870 /* Fast tracepoints are functionally identical to regular
12871 tracepoints, so don't take lack of support as a reason
12872 to give up on the trace run. */
12873 error (_("Target does not support static tracepoints"));
12875 /* If the tracepoint has a conditional, make it into an agent
12876 expression and append to the definition. */
12879 /* Only test support at download time, we may not know target
12880 capabilities at definition time. */
12881 if (remote_supports_cond_tracepoints ())
12883 agent_expr_up aexpr = gen_eval_for_expr (tpaddr,
12886 size_left = buf.size () - strlen (buf.data ());
12888 ret = snprintf (buf.data () + strlen (buf.data ()),
12889 size_left, ":X%x,", aexpr->len);
12891 if (ret < 0 || ret >= size_left)
12892 error ("%s", err_msg);
12894 size_left = buf.size () - strlen (buf.data ());
12896 /* Two bytes to encode each aexpr byte, plus the terminating
12898 if (aexpr->len * 2 + 1 > size_left)
12899 error ("%s", err_msg);
12901 pkt = buf.data () + strlen (buf.data ());
12903 for (int ndx = 0; ndx < aexpr->len; ++ndx)
12904 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
12908 warning (_("Target does not support conditional tracepoints, "
12909 "ignoring tp %d cond"), b->number);
12912 if (b->commands || *default_collect)
12914 size_left = buf.size () - strlen (buf.data ());
12916 ret = snprintf (buf.data () + strlen (buf.data ()),
12919 if (ret < 0 || ret >= size_left)
12920 error ("%s", err_msg);
12923 putpkt (buf.data ());
12924 remote_get_noisy_reply ();
12925 if (strcmp (rs->buf.data (), "OK"))
12926 error (_("Target does not support tracepoints."));
12928 /* do_single_steps (t); */
12929 for (auto action_it = tdp_actions.begin ();
12930 action_it != tdp_actions.end (); action_it++)
12932 QUIT; /* Allow user to bail out with ^C. */
12934 bool has_more = ((action_it + 1) != tdp_actions.end ()
12935 || !stepping_actions.empty ());
12937 ret = snprintf (buf.data (), buf.size (), "QTDP:-%x:%s:%s%c",
12938 b->number, addrbuf, /* address */
12939 action_it->c_str (),
12940 has_more ? '-' : 0);
12942 if (ret < 0 || ret >= buf.size ())
12943 error ("%s", err_msg);
12945 putpkt (buf.data ());
12946 remote_get_noisy_reply ();
12947 if (strcmp (rs->buf.data (), "OK"))
12948 error (_("Error on target while setting tracepoints."));
12951 for (auto action_it = stepping_actions.begin ();
12952 action_it != stepping_actions.end (); action_it++)
12954 QUIT; /* Allow user to bail out with ^C. */
12956 bool is_first = action_it == stepping_actions.begin ();
12957 bool has_more = (action_it + 1) != stepping_actions.end ();
12959 ret = snprintf (buf.data (), buf.size (), "QTDP:-%x:%s:%s%s%s",
12960 b->number, addrbuf, /* address */
12961 is_first ? "S" : "",
12962 action_it->c_str (),
12963 has_more ? "-" : "");
12965 if (ret < 0 || ret >= buf.size ())
12966 error ("%s", err_msg);
12968 putpkt (buf.data ());
12969 remote_get_noisy_reply ();
12970 if (strcmp (rs->buf.data (), "OK"))
12971 error (_("Error on target while setting tracepoints."));
12974 if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE)
12976 if (b->location != NULL)
12978 ret = snprintf (buf.data (), buf.size (), "QTDPsrc:");
12980 if (ret < 0 || ret >= buf.size ())
12981 error ("%s", err_msg);
12983 encode_source_string (b->number, loc->address, "at",
12984 event_location_to_string (b->location.get ()),
12985 buf.data () + strlen (buf.data ()),
12986 buf.size () - strlen (buf.data ()));
12987 putpkt (buf.data ());
12988 remote_get_noisy_reply ();
12989 if (strcmp (rs->buf.data (), "OK"))
12990 warning (_("Target does not support source download."));
12992 if (b->cond_string)
12994 ret = snprintf (buf.data (), buf.size (), "QTDPsrc:");
12996 if (ret < 0 || ret >= buf.size ())
12997 error ("%s", err_msg);
12999 encode_source_string (b->number, loc->address,
13000 "cond", b->cond_string,
13001 buf.data () + strlen (buf.data ()),
13002 buf.size () - strlen (buf.data ()));
13003 putpkt (buf.data ());
13004 remote_get_noisy_reply ();
13005 if (strcmp (rs->buf.data (), "OK"))
13006 warning (_("Target does not support source download."));
13008 remote_download_command_source (b->number, loc->address,
13009 breakpoint_commands (b));
13014 remote_target::can_download_tracepoint ()
13016 struct remote_state *rs = get_remote_state ();
13017 struct trace_status *ts;
13020 /* Don't try to install tracepoints until we've relocated our
13021 symbols, and fetched and merged the target's tracepoint list with
13023 if (rs->starting_up)
13026 ts = current_trace_status ();
13027 status = get_trace_status (ts);
13029 if (status == -1 || !ts->running_known || !ts->running)
13032 /* If we are in a tracing experiment, but remote stub doesn't support
13033 installing tracepoint in trace, we have to return. */
13034 if (!remote_supports_install_in_trace ())
13042 remote_target::download_trace_state_variable (const trace_state_variable &tsv)
13044 struct remote_state *rs = get_remote_state ();
13047 xsnprintf (rs->buf.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13048 tsv.number, phex ((ULONGEST) tsv.initial_value, 8),
13050 p = rs->buf.data () + strlen (rs->buf.data ());
13051 if ((p - rs->buf.data ()) + tsv.name.length () * 2
13052 >= get_remote_packet_size ())
13053 error (_("Trace state variable name too long for tsv definition packet"));
13054 p += 2 * bin2hex ((gdb_byte *) (tsv.name.data ()), p, tsv.name.length ());
13057 remote_get_noisy_reply ();
13058 if (rs->buf[0] == '\0')
13059 error (_("Target does not support this command."));
13060 if (strcmp (rs->buf.data (), "OK") != 0)
13061 error (_("Error on target while downloading trace state variable."));
13065 remote_target::enable_tracepoint (struct bp_location *location)
13067 struct remote_state *rs = get_remote_state ();
13070 sprintf_vma (addr_buf, location->address);
13071 xsnprintf (rs->buf.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13072 location->owner->number, addr_buf);
13074 remote_get_noisy_reply ();
13075 if (rs->buf[0] == '\0')
13076 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13077 if (strcmp (rs->buf.data (), "OK") != 0)
13078 error (_("Error on target while enabling tracepoint."));
13082 remote_target::disable_tracepoint (struct bp_location *location)
13084 struct remote_state *rs = get_remote_state ();
13087 sprintf_vma (addr_buf, location->address);
13088 xsnprintf (rs->buf.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13089 location->owner->number, addr_buf);
13091 remote_get_noisy_reply ();
13092 if (rs->buf[0] == '\0')
13093 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13094 if (strcmp (rs->buf.data (), "OK") != 0)
13095 error (_("Error on target while disabling tracepoint."));
13099 remote_target::trace_set_readonly_regions ()
13103 bfd_size_type size;
13109 return; /* No information to give. */
13111 struct remote_state *rs = get_remote_state ();
13113 strcpy (rs->buf.data (), "QTro");
13114 offset = strlen (rs->buf.data ());
13115 for (s = exec_bfd->sections; s; s = s->next)
13117 char tmp1[40], tmp2[40];
13120 if ((s->flags & SEC_LOAD) == 0 ||
13121 /* (s->flags & SEC_CODE) == 0 || */
13122 (s->flags & SEC_READONLY) == 0)
13126 vma = bfd_get_section_vma (abfd, s);
13127 size = bfd_get_section_size (s);
13128 sprintf_vma (tmp1, vma);
13129 sprintf_vma (tmp2, vma + size);
13130 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
13131 if (offset + sec_length + 1 > rs->buf.size ())
13133 if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE)
13135 Too many sections for read-only sections definition packet."));
13138 xsnprintf (rs->buf.data () + offset, rs->buf.size () - offset, ":%s,%s",
13140 offset += sec_length;
13145 getpkt (&rs->buf, 0);
13150 remote_target::trace_start ()
13152 struct remote_state *rs = get_remote_state ();
13154 putpkt ("QTStart");
13155 remote_get_noisy_reply ();
13156 if (rs->buf[0] == '\0')
13157 error (_("Target does not support this command."));
13158 if (strcmp (rs->buf.data (), "OK") != 0)
13159 error (_("Bogus reply from target: %s"), rs->buf.data ());
13163 remote_target::get_trace_status (struct trace_status *ts)
13165 /* Initialize it just to avoid a GCC false warning. */
13167 /* FIXME we need to get register block size some other way. */
13168 extern int trace_regblock_size;
13169 enum packet_result result;
13170 struct remote_state *rs = get_remote_state ();
13172 if (packet_support (PACKET_qTStatus) == PACKET_DISABLE)
13175 trace_regblock_size
13176 = rs->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet;
13178 putpkt ("qTStatus");
13182 p = remote_get_noisy_reply ();
13184 CATCH (ex, RETURN_MASK_ERROR)
13186 if (ex.error != TARGET_CLOSE_ERROR)
13188 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
13191 throw_exception (ex);
13195 result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]);
13197 /* If the remote target doesn't do tracing, flag it. */
13198 if (result == PACKET_UNKNOWN)
13201 /* We're working with a live target. */
13202 ts->filename = NULL;
13205 error (_("Bogus trace status reply from target: %s"), rs->buf.data ());
13207 /* Function 'parse_trace_status' sets default value of each field of
13208 'ts' at first, so we don't have to do it here. */
13209 parse_trace_status (p, ts);
13211 return ts->running;
13215 remote_target::get_tracepoint_status (struct breakpoint *bp,
13216 struct uploaded_tp *utp)
13218 struct remote_state *rs = get_remote_state ();
13220 struct bp_location *loc;
13221 struct tracepoint *tp = (struct tracepoint *) bp;
13222 size_t size = get_remote_packet_size ();
13227 tp->traceframe_usage = 0;
13228 for (loc = tp->loc; loc; loc = loc->next)
13230 /* If the tracepoint was never downloaded, don't go asking for
13232 if (tp->number_on_target == 0)
13234 xsnprintf (rs->buf.data (), size, "qTP:%x:%s", tp->number_on_target,
13235 phex_nz (loc->address, 0));
13237 reply = remote_get_noisy_reply ();
13238 if (reply && *reply)
13241 parse_tracepoint_status (reply + 1, bp, utp);
13247 utp->hit_count = 0;
13248 utp->traceframe_usage = 0;
13249 xsnprintf (rs->buf.data (), size, "qTP:%x:%s", utp->number,
13250 phex_nz (utp->addr, 0));
13252 reply = remote_get_noisy_reply ();
13253 if (reply && *reply)
13256 parse_tracepoint_status (reply + 1, bp, utp);
13262 remote_target::trace_stop ()
13264 struct remote_state *rs = get_remote_state ();
13267 remote_get_noisy_reply ();
13268 if (rs->buf[0] == '\0')
13269 error (_("Target does not support this command."));
13270 if (strcmp (rs->buf.data (), "OK") != 0)
13271 error (_("Bogus reply from target: %s"), rs->buf.data ());
13275 remote_target::trace_find (enum trace_find_type type, int num,
13276 CORE_ADDR addr1, CORE_ADDR addr2,
13279 struct remote_state *rs = get_remote_state ();
13280 char *endbuf = rs->buf.data () + get_remote_packet_size ();
13282 int target_frameno = -1, target_tracept = -1;
13284 /* Lookups other than by absolute frame number depend on the current
13285 trace selected, so make sure it is correct on the remote end
13287 if (type != tfind_number)
13288 set_remote_traceframe ();
13290 p = rs->buf.data ();
13291 strcpy (p, "QTFrame:");
13292 p = strchr (p, '\0');
13296 xsnprintf (p, endbuf - p, "%x", num);
13299 xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0));
13302 xsnprintf (p, endbuf - p, "tdp:%x", num);
13305 xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0),
13306 phex_nz (addr2, 0));
13308 case tfind_outside:
13309 xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0),
13310 phex_nz (addr2, 0));
13313 error (_("Unknown trace find type %d"), type);
13317 reply = remote_get_noisy_reply ();
13318 if (*reply == '\0')
13319 error (_("Target does not support this command."));
13321 while (reply && *reply)
13326 target_frameno = (int) strtol (p, &reply, 16);
13328 error (_("Unable to parse trace frame number"));
13329 /* Don't update our remote traceframe number cache on failure
13330 to select a remote traceframe. */
13331 if (target_frameno == -1)
13336 target_tracept = (int) strtol (p, &reply, 16);
13338 error (_("Unable to parse tracepoint number"));
13340 case 'O': /* "OK"? */
13341 if (reply[1] == 'K' && reply[2] == '\0')
13344 error (_("Bogus reply from target: %s"), reply);
13347 error (_("Bogus reply from target: %s"), reply);
13350 *tpp = target_tracept;
13352 rs->remote_traceframe_number = target_frameno;
13353 return target_frameno;
13357 remote_target::get_trace_state_variable_value (int tsvnum, LONGEST *val)
13359 struct remote_state *rs = get_remote_state ();
13363 set_remote_traceframe ();
13365 xsnprintf (rs->buf.data (), get_remote_packet_size (), "qTV:%x", tsvnum);
13367 reply = remote_get_noisy_reply ();
13368 if (reply && *reply)
13372 unpack_varlen_hex (reply + 1, &uval);
13373 *val = (LONGEST) uval;
13381 remote_target::save_trace_data (const char *filename)
13383 struct remote_state *rs = get_remote_state ();
13386 p = rs->buf.data ();
13387 strcpy (p, "QTSave:");
13389 if ((p - rs->buf.data ()) + strlen (filename) * 2
13390 >= get_remote_packet_size ())
13391 error (_("Remote file name too long for trace save packet"));
13392 p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename));
13395 reply = remote_get_noisy_reply ();
13396 if (*reply == '\0')
13397 error (_("Target does not support this command."));
13398 if (strcmp (reply, "OK") != 0)
13399 error (_("Bogus reply from target: %s"), reply);
13403 /* This is basically a memory transfer, but needs to be its own packet
13404 because we don't know how the target actually organizes its trace
13405 memory, plus we want to be able to ask for as much as possible, but
13406 not be unhappy if we don't get as much as we ask for. */
13409 remote_target::get_raw_trace_data (gdb_byte *buf, ULONGEST offset, LONGEST len)
13411 struct remote_state *rs = get_remote_state ();
13416 p = rs->buf.data ();
13417 strcpy (p, "qTBuffer:");
13419 p += hexnumstr (p, offset);
13421 p += hexnumstr (p, len);
13425 reply = remote_get_noisy_reply ();
13426 if (reply && *reply)
13428 /* 'l' by itself means we're at the end of the buffer and
13429 there is nothing more to get. */
13433 /* Convert the reply into binary. Limit the number of bytes to
13434 convert according to our passed-in buffer size, rather than
13435 what was returned in the packet; if the target is
13436 unexpectedly generous and gives us a bigger reply than we
13437 asked for, we don't want to crash. */
13438 rslt = hex2bin (reply, buf, len);
13442 /* Something went wrong, flag as an error. */
13447 remote_target::set_disconnected_tracing (int val)
13449 struct remote_state *rs = get_remote_state ();
13451 if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE)
13455 xsnprintf (rs->buf.data (), get_remote_packet_size (),
13456 "QTDisconnected:%x", val);
13458 reply = remote_get_noisy_reply ();
13459 if (*reply == '\0')
13460 error (_("Target does not support this command."));
13461 if (strcmp (reply, "OK") != 0)
13462 error (_("Bogus reply from target: %s"), reply);
13465 warning (_("Target does not support disconnected tracing."));
13469 remote_target::core_of_thread (ptid_t ptid)
13471 struct thread_info *info = find_thread_ptid (ptid);
13473 if (info != NULL && info->priv != NULL)
13474 return get_remote_thread_info (info)->core;
13480 remote_target::set_circular_trace_buffer (int val)
13482 struct remote_state *rs = get_remote_state ();
13485 xsnprintf (rs->buf.data (), get_remote_packet_size (),
13486 "QTBuffer:circular:%x", val);
13488 reply = remote_get_noisy_reply ();
13489 if (*reply == '\0')
13490 error (_("Target does not support this command."));
13491 if (strcmp (reply, "OK") != 0)
13492 error (_("Bogus reply from target: %s"), reply);
13496 remote_target::traceframe_info ()
13498 gdb::optional<gdb::char_vector> text
13499 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO,
13502 return parse_traceframe_info (text->data ());
13507 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13508 instruction on which a fast tracepoint may be placed. Returns -1
13509 if the packet is not supported, and 0 if the minimum instruction
13510 length is unknown. */
13513 remote_target::get_min_fast_tracepoint_insn_len ()
13515 struct remote_state *rs = get_remote_state ();
13518 /* If we're not debugging a process yet, the IPA can't be
13520 if (!target_has_execution)
13523 /* Make sure the remote is pointing at the right process. */
13524 set_general_process ();
13526 xsnprintf (rs->buf.data (), get_remote_packet_size (), "qTMinFTPILen");
13528 reply = remote_get_noisy_reply ();
13529 if (*reply == '\0')
13533 ULONGEST min_insn_len;
13535 unpack_varlen_hex (reply, &min_insn_len);
13537 return (int) min_insn_len;
13542 remote_target::set_trace_buffer_size (LONGEST val)
13544 if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE)
13546 struct remote_state *rs = get_remote_state ();
13547 char *buf = rs->buf.data ();
13548 char *endbuf = buf + get_remote_packet_size ();
13549 enum packet_result result;
13551 gdb_assert (val >= 0 || val == -1);
13552 buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
13553 /* Send -1 as literal "-1" to avoid host size dependency. */
13557 buf += hexnumstr (buf, (ULONGEST) -val);
13560 buf += hexnumstr (buf, (ULONGEST) val);
13563 remote_get_noisy_reply ();
13564 result = packet_ok (rs->buf,
13565 &remote_protocol_packets[PACKET_QTBuffer_size]);
13567 if (result != PACKET_OK)
13568 warning (_("Bogus reply from target: %s"), rs->buf.data ());
13573 remote_target::set_trace_notes (const char *user, const char *notes,
13574 const char *stop_notes)
13576 struct remote_state *rs = get_remote_state ();
13578 char *buf = rs->buf.data ();
13579 char *endbuf = buf + get_remote_packet_size ();
13582 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
13585 buf += xsnprintf (buf, endbuf - buf, "user:");
13586 nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user));
13592 buf += xsnprintf (buf, endbuf - buf, "notes:");
13593 nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes));
13599 buf += xsnprintf (buf, endbuf - buf, "tstop:");
13600 nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes));
13604 /* Ensure the buffer is terminated. */
13608 reply = remote_get_noisy_reply ();
13609 if (*reply == '\0')
13612 if (strcmp (reply, "OK") != 0)
13613 error (_("Bogus reply from target: %s"), reply);
13619 remote_target::use_agent (bool use)
13621 if (packet_support (PACKET_QAgent) != PACKET_DISABLE)
13623 struct remote_state *rs = get_remote_state ();
13625 /* If the stub supports QAgent. */
13626 xsnprintf (rs->buf.data (), get_remote_packet_size (), "QAgent:%d", use);
13628 getpkt (&rs->buf, 0);
13630 if (strcmp (rs->buf.data (), "OK") == 0)
13641 remote_target::can_use_agent ()
13643 return (packet_support (PACKET_QAgent) != PACKET_DISABLE);
13646 struct btrace_target_info
13648 /* The ptid of the traced thread. */
13651 /* The obtained branch trace configuration. */
13652 struct btrace_config conf;
13655 /* Reset our idea of our target's btrace configuration. */
13658 remote_btrace_reset (remote_state *rs)
13660 memset (&rs->btrace_config, 0, sizeof (rs->btrace_config));
13663 /* Synchronize the configuration with the target. */
13666 remote_target::btrace_sync_conf (const btrace_config *conf)
13668 struct packet_config *packet;
13669 struct remote_state *rs;
13670 char *buf, *pos, *endbuf;
13672 rs = get_remote_state ();
13673 buf = rs->buf.data ();
13674 endbuf = buf + get_remote_packet_size ();
13676 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size];
13677 if (packet_config_support (packet) == PACKET_ENABLE
13678 && conf->bts.size != rs->btrace_config.bts.size)
13681 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
13685 getpkt (&rs->buf, 0);
13687 if (packet_ok (buf, packet) == PACKET_ERROR)
13689 if (buf[0] == 'E' && buf[1] == '.')
13690 error (_("Failed to configure the BTS buffer size: %s"), buf + 2);
13692 error (_("Failed to configure the BTS buffer size."));
13695 rs->btrace_config.bts.size = conf->bts.size;
13698 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size];
13699 if (packet_config_support (packet) == PACKET_ENABLE
13700 && conf->pt.size != rs->btrace_config.pt.size)
13703 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
13707 getpkt (&rs->buf, 0);
13709 if (packet_ok (buf, packet) == PACKET_ERROR)
13711 if (buf[0] == 'E' && buf[1] == '.')
13712 error (_("Failed to configure the trace buffer size: %s"), buf + 2);
13714 error (_("Failed to configure the trace buffer size."));
13717 rs->btrace_config.pt.size = conf->pt.size;
13721 /* Read the current thread's btrace configuration from the target and
13722 store it into CONF. */
13725 btrace_read_config (struct btrace_config *conf)
13727 gdb::optional<gdb::char_vector> xml
13728 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF, "");
13730 parse_xml_btrace_conf (conf, xml->data ());
13733 /* Maybe reopen target btrace. */
13736 remote_target::remote_btrace_maybe_reopen ()
13738 struct remote_state *rs = get_remote_state ();
13739 int btrace_target_pushed = 0;
13740 #if !defined (HAVE_LIBIPT)
13744 scoped_restore_current_thread restore_thread;
13746 for (thread_info *tp : all_non_exited_threads ())
13748 set_general_thread (tp->ptid);
13750 memset (&rs->btrace_config, 0x00, sizeof (struct btrace_config));
13751 btrace_read_config (&rs->btrace_config);
13753 if (rs->btrace_config.format == BTRACE_FORMAT_NONE)
13756 #if !defined (HAVE_LIBIPT)
13757 if (rs->btrace_config.format == BTRACE_FORMAT_PT)
13762 warning (_("Target is recording using Intel Processor Trace "
13763 "but support was disabled at compile time."));
13768 #endif /* !defined (HAVE_LIBIPT) */
13770 /* Push target, once, but before anything else happens. This way our
13771 changes to the threads will be cleaned up by unpushing the target
13772 in case btrace_read_config () throws. */
13773 if (!btrace_target_pushed)
13775 btrace_target_pushed = 1;
13776 record_btrace_push_target ();
13777 printf_filtered (_("Target is recording using %s.\n"),
13778 btrace_format_string (rs->btrace_config.format));
13781 tp->btrace.target = XCNEW (struct btrace_target_info);
13782 tp->btrace.target->ptid = tp->ptid;
13783 tp->btrace.target->conf = rs->btrace_config;
13787 /* Enable branch tracing. */
13789 struct btrace_target_info *
13790 remote_target::enable_btrace (ptid_t ptid, const struct btrace_config *conf)
13792 struct btrace_target_info *tinfo = NULL;
13793 struct packet_config *packet = NULL;
13794 struct remote_state *rs = get_remote_state ();
13795 char *buf = rs->buf.data ();
13796 char *endbuf = buf + get_remote_packet_size ();
13798 switch (conf->format)
13800 case BTRACE_FORMAT_BTS:
13801 packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
13804 case BTRACE_FORMAT_PT:
13805 packet = &remote_protocol_packets[PACKET_Qbtrace_pt];
13809 if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE)
13810 error (_("Target does not support branch tracing."));
13812 btrace_sync_conf (conf);
13814 set_general_thread (ptid);
13816 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
13818 getpkt (&rs->buf, 0);
13820 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
13822 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
13823 error (_("Could not enable branch tracing for %s: %s"),
13824 target_pid_to_str (ptid), &rs->buf[2]);
13826 error (_("Could not enable branch tracing for %s."),
13827 target_pid_to_str (ptid));
13830 tinfo = XCNEW (struct btrace_target_info);
13831 tinfo->ptid = ptid;
13833 /* If we fail to read the configuration, we lose some information, but the
13834 tracing itself is not impacted. */
13837 btrace_read_config (&tinfo->conf);
13839 CATCH (err, RETURN_MASK_ERROR)
13841 if (err.message != NULL)
13842 warning ("%s", err.message);
13849 /* Disable branch tracing. */
13852 remote_target::disable_btrace (struct btrace_target_info *tinfo)
13854 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off];
13855 struct remote_state *rs = get_remote_state ();
13856 char *buf = rs->buf.data ();
13857 char *endbuf = buf + get_remote_packet_size ();
13859 if (packet_config_support (packet) != PACKET_ENABLE)
13860 error (_("Target does not support branch tracing."));
13862 set_general_thread (tinfo->ptid);
13864 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
13866 getpkt (&rs->buf, 0);
13868 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
13870 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
13871 error (_("Could not disable branch tracing for %s: %s"),
13872 target_pid_to_str (tinfo->ptid), &rs->buf[2]);
13874 error (_("Could not disable branch tracing for %s."),
13875 target_pid_to_str (tinfo->ptid));
13881 /* Teardown branch tracing. */
13884 remote_target::teardown_btrace (struct btrace_target_info *tinfo)
13886 /* We must not talk to the target during teardown. */
13890 /* Read the branch trace. */
13893 remote_target::read_btrace (struct btrace_data *btrace,
13894 struct btrace_target_info *tinfo,
13895 enum btrace_read_type type)
13897 struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
13900 if (packet_config_support (packet) != PACKET_ENABLE)
13901 error (_("Target does not support branch tracing."));
13903 #if !defined(HAVE_LIBEXPAT)
13904 error (_("Cannot process branch tracing result. XML parsing not supported."));
13909 case BTRACE_READ_ALL:
13912 case BTRACE_READ_NEW:
13915 case BTRACE_READ_DELTA:
13919 internal_error (__FILE__, __LINE__,
13920 _("Bad branch tracing read type: %u."),
13921 (unsigned int) type);
13924 gdb::optional<gdb::char_vector> xml
13925 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE, annex);
13927 return BTRACE_ERR_UNKNOWN;
13929 parse_xml_btrace (btrace, xml->data ());
13931 return BTRACE_ERR_NONE;
13934 const struct btrace_config *
13935 remote_target::btrace_conf (const struct btrace_target_info *tinfo)
13937 return &tinfo->conf;
13941 remote_target::augmented_libraries_svr4_read ()
13943 return (packet_support (PACKET_augmented_libraries_svr4_read_feature)
13947 /* Implementation of to_load. */
13950 remote_target::load (const char *name, int from_tty)
13952 generic_load (name, from_tty);
13955 /* Accepts an integer PID; returns a string representing a file that
13956 can be opened on the remote side to get the symbols for the child
13957 process. Returns NULL if the operation is not supported. */
13960 remote_target::pid_to_exec_file (int pid)
13962 static gdb::optional<gdb::char_vector> filename;
13963 struct inferior *inf;
13964 char *annex = NULL;
13966 if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE)
13969 inf = find_inferior_pid (pid);
13971 internal_error (__FILE__, __LINE__,
13972 _("not currently attached to process %d"), pid);
13974 if (!inf->fake_pid_p)
13976 const int annex_size = 9;
13978 annex = (char *) alloca (annex_size);
13979 xsnprintf (annex, annex_size, "%x", pid);
13982 filename = target_read_stralloc (current_top_target (),
13983 TARGET_OBJECT_EXEC_FILE, annex);
13985 return filename ? filename->data () : nullptr;
13988 /* Implement the to_can_do_single_step target_ops method. */
13991 remote_target::can_do_single_step ()
13993 /* We can only tell whether target supports single step or not by
13994 supported s and S vCont actions if the stub supports vContSupported
13995 feature. If the stub doesn't support vContSupported feature,
13996 we have conservatively to think target doesn't supports single
13998 if (packet_support (PACKET_vContSupported) == PACKET_ENABLE)
14000 struct remote_state *rs = get_remote_state ();
14002 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
14003 remote_vcont_probe ();
14005 return rs->supports_vCont.s && rs->supports_vCont.S;
14011 /* Implementation of the to_execution_direction method for the remote
14014 enum exec_direction_kind
14015 remote_target::execution_direction ()
14017 struct remote_state *rs = get_remote_state ();
14019 return rs->last_resume_exec_dir;
14022 /* Return pointer to the thread_info struct which corresponds to
14023 THREAD_HANDLE (having length HANDLE_LEN). */
14026 remote_target::thread_handle_to_thread_info (const gdb_byte *thread_handle,
14030 for (thread_info *tp : all_non_exited_threads ())
14032 remote_thread_info *priv = get_remote_thread_info (tp);
14034 if (tp->inf == inf && priv != NULL)
14036 if (handle_len != priv->thread_handle.size ())
14037 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14038 handle_len, priv->thread_handle.size ());
14039 if (memcmp (thread_handle, priv->thread_handle.data (),
14049 remote_target::can_async_p ()
14051 struct remote_state *rs = get_remote_state ();
14053 /* We don't go async if the user has explicitly prevented it with the
14054 "maint set target-async" command. */
14055 if (!target_async_permitted)
14058 /* We're async whenever the serial device is. */
14059 return serial_can_async_p (rs->remote_desc);
14063 remote_target::is_async_p ()
14065 struct remote_state *rs = get_remote_state ();
14067 if (!target_async_permitted)
14068 /* We only enable async when the user specifically asks for it. */
14071 /* We're async whenever the serial device is. */
14072 return serial_is_async_p (rs->remote_desc);
14075 /* Pass the SERIAL event on and up to the client. One day this code
14076 will be able to delay notifying the client of an event until the
14077 point where an entire packet has been received. */
14079 static serial_event_ftype remote_async_serial_handler;
14082 remote_async_serial_handler (struct serial *scb, void *context)
14084 /* Don't propogate error information up to the client. Instead let
14085 the client find out about the error by querying the target. */
14086 inferior_event_handler (INF_REG_EVENT, NULL);
14090 remote_async_inferior_event_handler (gdb_client_data data)
14092 inferior_event_handler (INF_REG_EVENT, data);
14096 remote_target::async (int enable)
14098 struct remote_state *rs = get_remote_state ();
14102 serial_async (rs->remote_desc, remote_async_serial_handler, rs);
14104 /* If there are pending events in the stop reply queue tell the
14105 event loop to process them. */
14106 if (!rs->stop_reply_queue.empty ())
14107 mark_async_event_handler (rs->remote_async_inferior_event_token);
14108 /* For simplicity, below we clear the pending events token
14109 without remembering whether it is marked, so here we always
14110 mark it. If there's actually no pending notification to
14111 process, this ends up being a no-op (other than a spurious
14112 event-loop wakeup). */
14113 if (target_is_non_stop_p ())
14114 mark_async_event_handler (rs->notif_state->get_pending_events_token);
14118 serial_async (rs->remote_desc, NULL, NULL);
14119 /* If the core is disabling async, it doesn't want to be
14120 disturbed with target events. Clear all async event sources
14122 clear_async_event_handler (rs->remote_async_inferior_event_token);
14123 if (target_is_non_stop_p ())
14124 clear_async_event_handler (rs->notif_state->get_pending_events_token);
14128 /* Implementation of the to_thread_events method. */
14131 remote_target::thread_events (int enable)
14133 struct remote_state *rs = get_remote_state ();
14134 size_t size = get_remote_packet_size ();
14136 if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE)
14139 xsnprintf (rs->buf.data (), size, "QThreadEvents:%x", enable ? 1 : 0);
14141 getpkt (&rs->buf, 0);
14143 switch (packet_ok (rs->buf,
14144 &remote_protocol_packets[PACKET_QThreadEvents]))
14147 if (strcmp (rs->buf.data (), "OK") != 0)
14148 error (_("Remote refused setting thread events: %s"), rs->buf.data ());
14151 warning (_("Remote failure reply: %s"), rs->buf.data ());
14153 case PACKET_UNKNOWN:
14159 set_remote_cmd (const char *args, int from_tty)
14161 help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout);
14165 show_remote_cmd (const char *args, int from_tty)
14167 /* We can't just use cmd_show_list here, because we want to skip
14168 the redundant "show remote Z-packet" and the legacy aliases. */
14169 struct cmd_list_element *list = remote_show_cmdlist;
14170 struct ui_out *uiout = current_uiout;
14172 ui_out_emit_tuple tuple_emitter (uiout, "showlist");
14173 for (; list != NULL; list = list->next)
14174 if (strcmp (list->name, "Z-packet") == 0)
14176 else if (list->type == not_set_cmd)
14177 /* Alias commands are exactly like the original, except they
14178 don't have the normal type. */
14182 ui_out_emit_tuple option_emitter (uiout, "option");
14184 uiout->field_string ("name", list->name);
14185 uiout->text (": ");
14186 if (list->type == show_cmd)
14187 do_show_command (NULL, from_tty, list);
14189 cmd_func (list, NULL, from_tty);
14194 /* Function to be called whenever a new objfile (shlib) is detected. */
14196 remote_new_objfile (struct objfile *objfile)
14198 remote_target *remote = get_current_remote_target ();
14200 if (remote != NULL) /* Have a remote connection. */
14201 remote->remote_check_symbols ();
14204 /* Pull all the tracepoints defined on the target and create local
14205 data structures representing them. We don't want to create real
14206 tracepoints yet, we don't want to mess up the user's existing
14210 remote_target::upload_tracepoints (struct uploaded_tp **utpp)
14212 struct remote_state *rs = get_remote_state ();
14215 /* Ask for a first packet of tracepoint definition. */
14217 getpkt (&rs->buf, 0);
14218 p = rs->buf.data ();
14219 while (*p && *p != 'l')
14221 parse_tracepoint_definition (p, utpp);
14222 /* Ask for another packet of tracepoint definition. */
14224 getpkt (&rs->buf, 0);
14225 p = rs->buf.data ();
14231 remote_target::upload_trace_state_variables (struct uploaded_tsv **utsvp)
14233 struct remote_state *rs = get_remote_state ();
14236 /* Ask for a first packet of variable definition. */
14238 getpkt (&rs->buf, 0);
14239 p = rs->buf.data ();
14240 while (*p && *p != 'l')
14242 parse_tsv_definition (p, utsvp);
14243 /* Ask for another packet of variable definition. */
14245 getpkt (&rs->buf, 0);
14246 p = rs->buf.data ();
14251 /* The "set/show range-stepping" show hook. */
14254 show_range_stepping (struct ui_file *file, int from_tty,
14255 struct cmd_list_element *c,
14258 fprintf_filtered (file,
14259 _("Debugger's willingness to use range stepping "
14260 "is %s.\n"), value);
14263 /* Return true if the vCont;r action is supported by the remote
14267 remote_target::vcont_r_supported ()
14269 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
14270 remote_vcont_probe ();
14272 return (packet_support (PACKET_vCont) == PACKET_ENABLE
14273 && get_remote_state ()->supports_vCont.r);
14276 /* The "set/show range-stepping" set hook. */
14279 set_range_stepping (const char *ignore_args, int from_tty,
14280 struct cmd_list_element *c)
14282 /* When enabling, check whether range stepping is actually supported
14283 by the target, and warn if not. */
14284 if (use_range_stepping)
14286 remote_target *remote = get_current_remote_target ();
14288 || !remote->vcont_r_supported ())
14289 warning (_("Range stepping is not supported by the current target"));
14294 _initialize_remote (void)
14296 struct cmd_list_element *cmd;
14297 const char *cmd_name;
14299 /* architecture specific data */
14300 remote_g_packet_data_handle =
14301 gdbarch_data_register_pre_init (remote_g_packet_data_init);
14304 = register_program_space_data_with_cleanup (NULL,
14305 remote_pspace_data_cleanup);
14307 add_target (remote_target_info, remote_target::open);
14308 add_target (extended_remote_target_info, extended_remote_target::open);
14310 /* Hook into new objfile notification. */
14311 gdb::observers::new_objfile.attach (remote_new_objfile);
14314 init_remote_threadtests ();
14317 /* set/show remote ... */
14319 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
14320 Remote protocol specific variables\n\
14321 Configure various remote-protocol specific variables such as\n\
14322 the packets being used"),
14323 &remote_set_cmdlist, "set remote ",
14324 0 /* allow-unknown */, &setlist);
14325 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
14326 Remote protocol specific variables\n\
14327 Configure various remote-protocol specific variables such as\n\
14328 the packets being used"),
14329 &remote_show_cmdlist, "show remote ",
14330 0 /* allow-unknown */, &showlist);
14332 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
14333 Compare section data on target to the exec file.\n\
14334 Argument is a single section name (default: all loaded sections).\n\
14335 To compare only read-only loaded sections, specify the -r option."),
14338 add_cmd ("packet", class_maintenance, packet_command, _("\
14339 Send an arbitrary packet to a remote target.\n\
14340 maintenance packet TEXT\n\
14341 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14342 this command sends the string TEXT to the inferior, and displays the\n\
14343 response packet. GDB supplies the initial `$' character, and the\n\
14344 terminating `#' character and checksum."),
14347 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
14348 Set whether to send break if interrupted."), _("\
14349 Show whether to send break if interrupted."), _("\
14350 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14351 set_remotebreak, show_remotebreak,
14352 &setlist, &showlist);
14353 cmd_name = "remotebreak";
14354 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
14355 deprecate_cmd (cmd, "set remote interrupt-sequence");
14356 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
14357 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
14358 deprecate_cmd (cmd, "show remote interrupt-sequence");
14360 add_setshow_enum_cmd ("interrupt-sequence", class_support,
14361 interrupt_sequence_modes, &interrupt_sequence_mode,
14363 Set interrupt sequence to remote target."), _("\
14364 Show interrupt sequence to remote target."), _("\
14365 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14366 NULL, show_interrupt_sequence,
14367 &remote_set_cmdlist,
14368 &remote_show_cmdlist);
14370 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
14371 &interrupt_on_connect, _("\
14372 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14373 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14374 If set, interrupt sequence is sent to remote target."),
14376 &remote_set_cmdlist, &remote_show_cmdlist);
14378 /* Install commands for configuring memory read/write packets. */
14380 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
14381 Set the maximum number of bytes per memory write packet (deprecated)."),
14383 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
14384 Show the maximum number of bytes per memory write packet (deprecated)."),
14386 add_cmd ("memory-write-packet-size", no_class,
14387 set_memory_write_packet_size, _("\
14388 Set the maximum number of bytes per memory-write packet.\n\
14389 Specify the number of bytes in a packet or 0 (zero) for the\n\
14390 default packet size. The actual limit is further reduced\n\
14391 dependent on the target. Specify ``fixed'' to disable the\n\
14392 further restriction and ``limit'' to enable that restriction."),
14393 &remote_set_cmdlist);
14394 add_cmd ("memory-read-packet-size", no_class,
14395 set_memory_read_packet_size, _("\
14396 Set the maximum number of bytes per memory-read packet.\n\
14397 Specify the number of bytes in a packet or 0 (zero) for the\n\
14398 default packet size. The actual limit is further reduced\n\
14399 dependent on the target. Specify ``fixed'' to disable the\n\
14400 further restriction and ``limit'' to enable that restriction."),
14401 &remote_set_cmdlist);
14402 add_cmd ("memory-write-packet-size", no_class,
14403 show_memory_write_packet_size,
14404 _("Show the maximum number of bytes per memory-write packet."),
14405 &remote_show_cmdlist);
14406 add_cmd ("memory-read-packet-size", no_class,
14407 show_memory_read_packet_size,
14408 _("Show the maximum number of bytes per memory-read packet."),
14409 &remote_show_cmdlist);
14411 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class,
14412 &remote_hw_watchpoint_limit, _("\
14413 Set the maximum number of target hardware watchpoints."), _("\
14414 Show the maximum number of target hardware watchpoints."), _("\
14415 Specify \"unlimited\" for unlimited hardware watchpoints."),
14416 NULL, show_hardware_watchpoint_limit,
14417 &remote_set_cmdlist,
14418 &remote_show_cmdlist);
14419 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14421 &remote_hw_watchpoint_length_limit, _("\
14422 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14423 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14424 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14425 NULL, show_hardware_watchpoint_length_limit,
14426 &remote_set_cmdlist, &remote_show_cmdlist);
14427 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class,
14428 &remote_hw_breakpoint_limit, _("\
14429 Set the maximum number of target hardware breakpoints."), _("\
14430 Show the maximum number of target hardware breakpoints."), _("\
14431 Specify \"unlimited\" for unlimited hardware breakpoints."),
14432 NULL, show_hardware_breakpoint_limit,
14433 &remote_set_cmdlist, &remote_show_cmdlist);
14435 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure,
14436 &remote_address_size, _("\
14437 Set the maximum size of the address (in bits) in a memory packet."), _("\
14438 Show the maximum size of the address (in bits) in a memory packet."), NULL,
14440 NULL, /* FIXME: i18n: */
14441 &setlist, &showlist);
14443 init_all_packet_configs ();
14445 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
14446 "X", "binary-download", 1);
14448 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
14449 "vCont", "verbose-resume", 0);
14451 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
14452 "QPassSignals", "pass-signals", 0);
14454 add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls],
14455 "QCatchSyscalls", "catch-syscalls", 0);
14457 add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals],
14458 "QProgramSignals", "program-signals", 0);
14460 add_packet_config_cmd (&remote_protocol_packets[PACKET_QSetWorkingDir],
14461 "QSetWorkingDir", "set-working-dir", 0);
14463 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartupWithShell],
14464 "QStartupWithShell", "startup-with-shell", 0);
14466 add_packet_config_cmd (&remote_protocol_packets
14467 [PACKET_QEnvironmentHexEncoded],
14468 "QEnvironmentHexEncoded", "environment-hex-encoded",
14471 add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentReset],
14472 "QEnvironmentReset", "environment-reset",
14475 add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentUnset],
14476 "QEnvironmentUnset", "environment-unset",
14479 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
14480 "qSymbol", "symbol-lookup", 0);
14482 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
14483 "P", "set-register", 1);
14485 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
14486 "p", "fetch-register", 1);
14488 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
14489 "Z0", "software-breakpoint", 0);
14491 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
14492 "Z1", "hardware-breakpoint", 0);
14494 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
14495 "Z2", "write-watchpoint", 0);
14497 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
14498 "Z3", "read-watchpoint", 0);
14500 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
14501 "Z4", "access-watchpoint", 0);
14503 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
14504 "qXfer:auxv:read", "read-aux-vector", 0);
14506 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file],
14507 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14509 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
14510 "qXfer:features:read", "target-features", 0);
14512 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
14513 "qXfer:libraries:read", "library-info", 0);
14515 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
14516 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14518 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
14519 "qXfer:memory-map:read", "memory-map", 0);
14521 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
14522 "qXfer:spu:read", "read-spu-object", 0);
14524 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
14525 "qXfer:spu:write", "write-spu-object", 0);
14527 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
14528 "qXfer:osdata:read", "osdata", 0);
14530 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
14531 "qXfer:threads:read", "threads", 0);
14533 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
14534 "qXfer:siginfo:read", "read-siginfo-object", 0);
14536 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
14537 "qXfer:siginfo:write", "write-siginfo-object", 0);
14539 add_packet_config_cmd
14540 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
14541 "qXfer:traceframe-info:read", "traceframe-info", 0);
14543 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib],
14544 "qXfer:uib:read", "unwind-info-block", 0);
14546 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
14547 "qGetTLSAddr", "get-thread-local-storage-address",
14550 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
14551 "qGetTIBAddr", "get-thread-information-block-address",
14554 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
14555 "bc", "reverse-continue", 0);
14557 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
14558 "bs", "reverse-step", 0);
14560 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
14561 "qSupported", "supported-packets", 0);
14563 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
14564 "qSearch:memory", "search-memory", 0);
14566 add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus],
14567 "qTStatus", "trace-status", 0);
14569 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs],
14570 "vFile:setfs", "hostio-setfs", 0);
14572 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
14573 "vFile:open", "hostio-open", 0);
14575 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
14576 "vFile:pread", "hostio-pread", 0);
14578 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
14579 "vFile:pwrite", "hostio-pwrite", 0);
14581 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
14582 "vFile:close", "hostio-close", 0);
14584 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
14585 "vFile:unlink", "hostio-unlink", 0);
14587 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
14588 "vFile:readlink", "hostio-readlink", 0);
14590 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat],
14591 "vFile:fstat", "hostio-fstat", 0);
14593 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
14594 "vAttach", "attach", 0);
14596 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
14599 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
14600 "QStartNoAckMode", "noack", 0);
14602 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
14603 "vKill", "kill", 0);
14605 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
14606 "qAttached", "query-attached", 0);
14608 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
14609 "ConditionalTracepoints",
14610 "conditional-tracepoints", 0);
14612 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
14613 "ConditionalBreakpoints",
14614 "conditional-breakpoints", 0);
14616 add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands],
14617 "BreakpointCommands",
14618 "breakpoint-commands", 0);
14620 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
14621 "FastTracepoints", "fast-tracepoints", 0);
14623 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
14624 "TracepointSource", "TracepointSource", 0);
14626 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
14627 "QAllow", "allow", 0);
14629 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
14630 "StaticTracepoints", "static-tracepoints", 0);
14632 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
14633 "InstallInTrace", "install-in-trace", 0);
14635 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
14636 "qXfer:statictrace:read", "read-sdata-object", 0);
14638 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
14639 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14641 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
14642 "QDisableRandomization", "disable-randomization", 0);
14644 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent],
14645 "QAgent", "agent", 0);
14647 add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size],
14648 "QTBuffer:size", "trace-buffer-size", 0);
14650 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off],
14651 "Qbtrace:off", "disable-btrace", 0);
14653 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
14654 "Qbtrace:bts", "enable-btrace-bts", 0);
14656 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt],
14657 "Qbtrace:pt", "enable-btrace-pt", 0);
14659 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
14660 "qXfer:btrace", "read-btrace", 0);
14662 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf],
14663 "qXfer:btrace-conf", "read-btrace-conf", 0);
14665 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size],
14666 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14668 add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature],
14669 "multiprocess-feature", "multiprocess-feature", 0);
14671 add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature],
14672 "swbreak-feature", "swbreak-feature", 0);
14674 add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature],
14675 "hwbreak-feature", "hwbreak-feature", 0);
14677 add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature],
14678 "fork-event-feature", "fork-event-feature", 0);
14680 add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature],
14681 "vfork-event-feature", "vfork-event-feature", 0);
14683 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size],
14684 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14686 add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported],
14687 "vContSupported", "verbose-resume-supported", 0);
14689 add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature],
14690 "exec-event-feature", "exec-event-feature", 0);
14692 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC],
14693 "vCtrlC", "ctrl-c", 0);
14695 add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents],
14696 "QThreadEvents", "thread-events", 0);
14698 add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed],
14699 "N stop reply", "no-resumed-stop-reply", 0);
14701 /* Assert that we've registered "set remote foo-packet" commands
14702 for all packet configs. */
14706 for (i = 0; i < PACKET_MAX; i++)
14708 /* Ideally all configs would have a command associated. Some
14709 still don't though. */
14714 case PACKET_QNonStop:
14715 case PACKET_EnableDisableTracepoints_feature:
14716 case PACKET_tracenz_feature:
14717 case PACKET_DisconnectedTracing_feature:
14718 case PACKET_augmented_libraries_svr4_read_feature:
14720 /* Additions to this list need to be well justified:
14721 pre-existing packets are OK; new packets are not. */
14729 /* This catches both forgetting to add a config command, and
14730 forgetting to remove a packet from the exception list. */
14731 gdb_assert (excepted == (remote_protocol_packets[i].name == NULL));
14735 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14736 Z sub-packet has its own set and show commands, but users may
14737 have sets to this variable in their .gdbinit files (or in their
14739 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
14740 &remote_Z_packet_detect, _("\
14741 Set use of remote protocol `Z' packets"), _("\
14742 Show use of remote protocol `Z' packets "), _("\
14743 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14745 set_remote_protocol_Z_packet_cmd,
14746 show_remote_protocol_Z_packet_cmd,
14747 /* FIXME: i18n: Use of remote protocol
14748 `Z' packets is %s. */
14749 &remote_set_cmdlist, &remote_show_cmdlist);
14751 add_prefix_cmd ("remote", class_files, remote_command, _("\
14752 Manipulate files on the remote system\n\
14753 Transfer files to and from the remote target system."),
14754 &remote_cmdlist, "remote ",
14755 0 /* allow-unknown */, &cmdlist);
14757 add_cmd ("put", class_files, remote_put_command,
14758 _("Copy a local file to the remote system."),
14761 add_cmd ("get", class_files, remote_get_command,
14762 _("Copy a remote file to the local system."),
14765 add_cmd ("delete", class_files, remote_delete_command,
14766 _("Delete a remote file."),
14769 add_setshow_string_noescape_cmd ("exec-file", class_files,
14770 &remote_exec_file_var, _("\
14771 Set the remote pathname for \"run\""), _("\
14772 Show the remote pathname for \"run\""), NULL,
14773 set_remote_exec_file,
14774 show_remote_exec_file,
14775 &remote_set_cmdlist,
14776 &remote_show_cmdlist);
14778 add_setshow_boolean_cmd ("range-stepping", class_run,
14779 &use_range_stepping, _("\
14780 Enable or disable range stepping."), _("\
14781 Show whether target-assisted range stepping is enabled."), _("\
14782 If on, and the target supports it, when stepping a source line, GDB\n\
14783 tells the target to step the corresponding range of addresses itself instead\n\
14784 of issuing multiple single-steps. This speeds up source level\n\
14785 stepping. If off, GDB always issues single-steps, even if range\n\
14786 stepping is supported by the target. The default is on."),
14787 set_range_stepping,
14788 show_range_stepping,
14792 /* Eventually initialize fileio. See fileio.c */
14793 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
14795 /* Take advantage of the fact that the TID field is not used, to tag
14796 special ptids with it set to != 0. */
14797 magic_null_ptid = ptid_t (42000, -1, 1);
14798 not_sent_ptid = ptid_t (42000, -2, 1);
14799 any_thread_ptid = ptid_t (42000, 0, 1);