1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2018 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 "terminal.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 "filestuff.h"
50 #include "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"
73 #include "record-btrace.h"
75 #include "common/scoped_restore.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 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
249 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
254 /* True if we're going through initial connection setup (finding out
255 about the remote side's threads, relocating symbols, etc.). */
256 bool starting_up = false;
258 /* If we negotiated packet size explicitly (and thus can bypass
259 heuristics for the largest packet size that will not overflow
260 a buffer in the stub), this will be set to that packet size.
261 Otherwise zero, meaning to use the guessed size. */
262 long explicit_packet_size = 0;
264 /* remote_wait is normally called when the target is running and
265 waits for a stop reply packet. But sometimes we need to call it
266 when the target is already stopped. We can send a "?" packet
267 and have remote_wait read the response. Or, if we already have
268 the response, we can stash it in BUF and tell remote_wait to
269 skip calling getpkt. This flag is set when BUF contains a
270 stop reply packet and the target is not waiting. */
271 int cached_wait_status = 0;
273 /* True, if in no ack mode. That is, neither GDB nor the stub will
274 expect acks from each other. The connection is assumed to be
276 bool noack_mode = false;
278 /* True if we're connected in extended remote mode. */
279 bool extended = false;
281 /* True if we resumed the target and we're waiting for the target to
282 stop. In the mean time, we can't start another command/query.
283 The remote server wouldn't be ready to process it, so we'd
284 timeout waiting for a reply that would never come and eventually
285 we'd close the connection. This can happen in asynchronous mode
286 because we allow GDB commands while the target is running. */
287 bool waiting_for_stop_reply = false;
289 /* The status of the stub support for the various vCont actions. */
290 vCont_action_support supports_vCont;
292 /* True if the user has pressed Ctrl-C, but the target hasn't
293 responded to that. */
294 bool ctrlc_pending_p = false;
296 /* True if we saw a Ctrl-C while reading or writing from/to the
297 remote descriptor. At that point it is not safe to send a remote
298 interrupt packet, so we instead remember we saw the Ctrl-C and
299 process it once we're done with sending/receiving the current
300 packet, which should be shortly. If however that takes too long,
301 and the user presses Ctrl-C again, we offer to disconnect. */
302 bool got_ctrlc_during_io = false;
304 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
305 remote_open knows that we don't have a file open when the program
307 struct serial *remote_desc = nullptr;
309 /* These are the threads which we last sent to the remote system. The
310 TID member will be -1 for all or -2 for not sent yet. */
311 ptid_t general_thread = null_ptid;
312 ptid_t continue_thread = null_ptid;
314 /* This is the traceframe which we last selected on the remote system.
315 It will be -1 if no traceframe is selected. */
316 int remote_traceframe_number = -1;
318 char *last_pass_packet = nullptr;
320 /* The last QProgramSignals packet sent to the target. We bypass
321 sending a new program signals list down to the target if the new
322 packet is exactly the same as the last we sent. IOW, we only let
323 the target know about program signals list changes. */
324 char *last_program_signals_packet = nullptr;
326 gdb_signal last_sent_signal = GDB_SIGNAL_0;
328 bool last_sent_step = false;
330 /* The execution direction of the last resume we got. */
331 exec_direction_kind last_resume_exec_dir = EXEC_FORWARD;
333 char *finished_object = nullptr;
334 char *finished_annex = nullptr;
335 ULONGEST finished_offset = 0;
337 /* Should we try the 'ThreadInfo' query packet?
339 This variable (NOT available to the user: auto-detect only!)
340 determines whether GDB will use the new, simpler "ThreadInfo"
341 query or the older, more complex syntax for thread queries.
342 This is an auto-detect variable (set to true at each connect,
343 and set to false when the target fails to recognize it). */
344 bool use_threadinfo_query = false;
345 bool use_threadextra_query = false;
347 threadref echo_nextthread {};
348 threadref nextthread {};
349 threadref resultthreadlist[MAXTHREADLISTRESULTS] {};
351 /* The state of remote notification. */
352 struct remote_notif_state *notif_state = nullptr;
354 /* The branch trace configuration. */
355 struct btrace_config btrace_config {};
357 /* The argument to the last "vFile:setfs:" packet we sent, used
358 to avoid sending repeated unnecessary "vFile:setfs:" packets.
359 Initialized to -1 to indicate that no "vFile:setfs:" packet
360 has yet been sent. */
363 /* A readahead cache for vFile:pread. Often, reading a binary
364 involves a sequence of small reads. E.g., when parsing an ELF
365 file. A readahead cache helps mostly the case of remote
366 debugging on a connection with higher latency, due to the
367 request/reply nature of the RSP. We only cache data for a single
368 file descriptor at a time. */
369 struct readahead_cache readahead_cache;
371 /* The list of already fetched and acknowledged stop events. This
372 queue is used for notification Stop, and other notifications
373 don't need queue for their events, because the notification
374 events of Stop can't be consumed immediately, so that events
375 should be queued first, and be consumed by remote_wait_{ns,as}
376 one per time. Other notifications can consume their events
377 immediately, so queue is not needed for them. */
378 std::vector<stop_reply_up> stop_reply_queue;
380 /* Asynchronous signal handle registered as event loop source for
381 when we have pending events ready to be passed to the core. */
382 struct async_event_handler *remote_async_inferior_event_token = nullptr;
384 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
385 ``forever'' still use the normal timeout mechanism. This is
386 currently used by the ASYNC code to guarentee that target reads
387 during the initial connect always time-out. Once getpkt has been
388 modified to return a timeout indication and, in turn
389 remote_wait()/wait_for_inferior() have gained a timeout parameter
391 int wait_forever_enabled_p = 1;
394 /* Mapping of remote protocol data for each gdbarch. Usually there
395 is only one entry here, though we may see more with stubs that
396 support multi-process. */
397 std::unordered_map<struct gdbarch *, remote_arch_state>
401 static const target_info remote_target_info = {
403 N_("Remote serial target in gdb-specific protocol"),
407 class remote_target : public target_ops
412 to_stratum = process_stratum;
414 ~remote_target () override;
416 const target_info &info () const override
417 { return remote_target_info; }
419 thread_control_capabilities get_thread_control_capabilities () override
420 { return tc_schedlock; }
422 /* Open a remote connection. */
423 static void open (const char *, int);
425 void close () override;
427 void detach (inferior *, int) override;
428 void disconnect (const char *, int) override;
430 void commit_resume () override;
431 void resume (ptid_t, int, enum gdb_signal) override;
432 ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
434 void fetch_registers (struct regcache *, int) override;
435 void store_registers (struct regcache *, int) override;
436 void prepare_to_store (struct regcache *) override;
438 void files_info () override;
440 int insert_breakpoint (struct gdbarch *, struct bp_target_info *) override;
442 int remove_breakpoint (struct gdbarch *, struct bp_target_info *,
443 enum remove_bp_reason) override;
446 bool stopped_by_sw_breakpoint () override;
447 bool supports_stopped_by_sw_breakpoint () override;
449 bool stopped_by_hw_breakpoint () override;
451 bool supports_stopped_by_hw_breakpoint () override;
453 bool stopped_by_watchpoint () override;
455 bool stopped_data_address (CORE_ADDR *) override;
457 bool watchpoint_addr_within_range (CORE_ADDR, CORE_ADDR, int) override;
459 int can_use_hw_breakpoint (enum bptype, int, int) override;
461 int insert_hw_breakpoint (struct gdbarch *, struct bp_target_info *) override;
463 int remove_hw_breakpoint (struct gdbarch *, struct bp_target_info *) override;
465 int region_ok_for_hw_watchpoint (CORE_ADDR, int) override;
467 int insert_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
468 struct expression *) override;
470 int remove_watchpoint (CORE_ADDR, int, enum target_hw_bp_type,
471 struct expression *) override;
473 void kill () override;
475 void load (const char *, int) override;
477 void mourn_inferior () override;
479 void pass_signals (int, unsigned char *) override;
481 int set_syscall_catchpoint (int, bool, int,
482 gdb::array_view<const int>) override;
484 void program_signals (int, unsigned char *) override;
486 bool thread_alive (ptid_t ptid) override;
488 const char *thread_name (struct thread_info *) override;
490 void update_thread_list () override;
492 const char *pid_to_str (ptid_t) override;
494 const char *extra_thread_info (struct thread_info *) override;
496 ptid_t get_ada_task_ptid (long lwp, long thread) override;
498 thread_info *thread_handle_to_thread_info (const gdb_byte *thread_handle,
500 inferior *inf) override;
502 void stop (ptid_t) override;
504 void interrupt () override;
506 void pass_ctrlc () override;
508 enum target_xfer_status xfer_partial (enum target_object object,
511 const gdb_byte *writebuf,
512 ULONGEST offset, ULONGEST len,
513 ULONGEST *xfered_len) override;
515 ULONGEST get_memory_xfer_limit () override;
517 void rcmd (const char *command, struct ui_file *output) override;
519 char *pid_to_exec_file (int pid) override;
521 void log_command (const char *cmd) override
523 serial_log_command (this, cmd);
526 CORE_ADDR get_thread_local_address (ptid_t ptid,
527 CORE_ADDR load_module_addr,
528 CORE_ADDR offset) override;
530 bool has_all_memory () override { return default_child_has_all_memory (); }
531 bool has_memory () override { return default_child_has_memory (); }
532 bool has_stack () override { return default_child_has_stack (); }
533 bool has_registers () override { return default_child_has_registers (); }
534 bool has_execution (ptid_t ptid) override { return default_child_has_execution (ptid); }
536 bool can_execute_reverse () override;
538 std::vector<mem_region> memory_map () override;
540 void flash_erase (ULONGEST address, LONGEST length) override;
542 void flash_done () override;
544 const struct target_desc *read_description () override;
546 int search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
547 const gdb_byte *pattern, ULONGEST pattern_len,
548 CORE_ADDR *found_addrp) override;
550 bool can_async_p () override;
552 bool is_async_p () override;
554 void async (int) override;
556 void thread_events (int) override;
558 int can_do_single_step () override;
560 void terminal_inferior () override;
562 void terminal_ours () override;
564 bool supports_non_stop () override;
566 bool supports_multi_process () override;
568 bool supports_disable_randomization () override;
570 bool filesystem_is_local () override;
573 int fileio_open (struct inferior *inf, const char *filename,
574 int flags, int mode, int warn_if_slow,
575 int *target_errno) override;
577 int fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
578 ULONGEST offset, int *target_errno) override;
580 int fileio_pread (int fd, gdb_byte *read_buf, int len,
581 ULONGEST offset, int *target_errno) override;
583 int fileio_fstat (int fd, struct stat *sb, int *target_errno) override;
585 int fileio_close (int fd, int *target_errno) override;
587 int fileio_unlink (struct inferior *inf,
588 const char *filename,
589 int *target_errno) override;
591 gdb::optional<std::string>
592 fileio_readlink (struct inferior *inf,
593 const char *filename,
594 int *target_errno) override;
596 bool supports_enable_disable_tracepoint () override;
598 bool supports_string_tracing () override;
600 bool supports_evaluation_of_breakpoint_conditions () override;
602 bool can_run_breakpoint_commands () override;
604 void trace_init () override;
606 void download_tracepoint (struct bp_location *location) override;
608 bool can_download_tracepoint () override;
610 void download_trace_state_variable (const trace_state_variable &tsv) override;
612 void enable_tracepoint (struct bp_location *location) override;
614 void disable_tracepoint (struct bp_location *location) override;
616 void trace_set_readonly_regions () override;
618 void trace_start () override;
620 int get_trace_status (struct trace_status *ts) override;
622 void get_tracepoint_status (struct breakpoint *tp, struct uploaded_tp *utp)
625 void trace_stop () override;
627 int trace_find (enum trace_find_type type, int num,
628 CORE_ADDR addr1, CORE_ADDR addr2, int *tpp) override;
630 bool get_trace_state_variable_value (int tsv, LONGEST *val) override;
632 int save_trace_data (const char *filename) override;
634 int upload_tracepoints (struct uploaded_tp **utpp) override;
636 int upload_trace_state_variables (struct uploaded_tsv **utsvp) override;
638 LONGEST get_raw_trace_data (gdb_byte *buf, ULONGEST offset, LONGEST len) override;
640 int get_min_fast_tracepoint_insn_len () override;
642 void set_disconnected_tracing (int val) override;
644 void set_circular_trace_buffer (int val) override;
646 void set_trace_buffer_size (LONGEST val) override;
648 bool set_trace_notes (const char *user, const char *notes,
649 const char *stopnotes) override;
651 int core_of_thread (ptid_t ptid) override;
653 int verify_memory (const gdb_byte *data,
654 CORE_ADDR memaddr, ULONGEST size) override;
657 bool get_tib_address (ptid_t ptid, CORE_ADDR *addr) override;
659 void set_permissions () override;
661 bool static_tracepoint_marker_at (CORE_ADDR,
662 struct static_tracepoint_marker *marker)
665 std::vector<static_tracepoint_marker>
666 static_tracepoint_markers_by_strid (const char *id) override;
668 traceframe_info_up traceframe_info () override;
670 bool use_agent (bool use) override;
671 bool can_use_agent () override;
673 struct btrace_target_info *enable_btrace (ptid_t ptid,
674 const struct btrace_config *conf) override;
676 void disable_btrace (struct btrace_target_info *tinfo) override;
678 void teardown_btrace (struct btrace_target_info *tinfo) override;
680 enum btrace_error read_btrace (struct btrace_data *data,
681 struct btrace_target_info *btinfo,
682 enum btrace_read_type type) override;
684 const struct btrace_config *btrace_conf (const struct btrace_target_info *) override;
685 bool augmented_libraries_svr4_read () override;
686 int follow_fork (int, int) override;
687 void follow_exec (struct inferior *, char *) override;
688 int insert_fork_catchpoint (int) override;
689 int remove_fork_catchpoint (int) override;
690 int insert_vfork_catchpoint (int) override;
691 int remove_vfork_catchpoint (int) override;
692 int insert_exec_catchpoint (int) override;
693 int remove_exec_catchpoint (int) override;
694 enum exec_direction_kind execution_direction () override;
696 public: /* Remote specific methods. */
698 void remote_download_command_source (int num, ULONGEST addr,
699 struct command_line *cmds);
701 void remote_file_put (const char *local_file, const char *remote_file,
703 void remote_file_get (const char *remote_file, const char *local_file,
705 void remote_file_delete (const char *remote_file, int from_tty);
707 int remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
708 ULONGEST offset, int *remote_errno);
709 int remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
710 ULONGEST offset, int *remote_errno);
711 int remote_hostio_pread_vFile (int fd, gdb_byte *read_buf, int len,
712 ULONGEST offset, int *remote_errno);
714 int remote_hostio_send_command (int command_bytes, int which_packet,
715 int *remote_errno, char **attachment,
716 int *attachment_len);
717 int remote_hostio_set_filesystem (struct inferior *inf,
719 /* We should get rid of this and use fileio_open directly. */
720 int remote_hostio_open (struct inferior *inf, const char *filename,
721 int flags, int mode, int warn_if_slow,
723 int remote_hostio_close (int fd, int *remote_errno);
725 int remote_hostio_unlink (inferior *inf, const char *filename,
728 struct remote_state *get_remote_state ();
730 long get_remote_packet_size (void);
731 long get_memory_packet_size (struct memory_packet_config *config);
733 long get_memory_write_packet_size ();
734 long get_memory_read_packet_size ();
736 char *append_pending_thread_resumptions (char *p, char *endp,
738 static void open_1 (const char *name, int from_tty, int extended_p);
739 void start_remote (int from_tty, int extended_p);
740 void remote_detach_1 (struct inferior *inf, int from_tty);
742 char *append_resumption (char *p, char *endp,
743 ptid_t ptid, int step, gdb_signal siggnal);
744 int remote_resume_with_vcont (ptid_t ptid, int step,
747 void add_current_inferior_and_thread (char *wait_status);
749 ptid_t wait_ns (ptid_t ptid, struct target_waitstatus *status,
751 ptid_t wait_as (ptid_t ptid, target_waitstatus *status,
754 ptid_t process_stop_reply (struct stop_reply *stop_reply,
755 target_waitstatus *status);
757 void remote_notice_new_inferior (ptid_t currthread, int executing);
759 void process_initial_stop_replies (int from_tty);
761 thread_info *remote_add_thread (ptid_t ptid, bool running, bool executing);
763 void btrace_sync_conf (const btrace_config *conf);
765 void remote_btrace_maybe_reopen ();
767 void remove_new_fork_children (threads_listing_context *context);
768 void kill_new_fork_children (int pid);
769 void discard_pending_stop_replies (struct inferior *inf);
770 int stop_reply_queue_length ();
772 void check_pending_events_prevent_wildcard_vcont
773 (int *may_global_wildcard_vcont);
775 void discard_pending_stop_replies_in_queue ();
776 struct stop_reply *remote_notif_remove_queued_reply (ptid_t ptid);
777 struct stop_reply *queued_stop_reply (ptid_t ptid);
778 int peek_stop_reply (ptid_t ptid);
779 void remote_parse_stop_reply (char *buf, stop_reply *event);
781 void remote_stop_ns (ptid_t ptid);
782 void remote_interrupt_as ();
783 void remote_interrupt_ns ();
785 char *remote_get_noisy_reply ();
786 int remote_query_attached (int pid);
787 inferior *remote_add_inferior (int fake_pid_p, int pid, int attached,
790 ptid_t remote_current_thread (ptid_t oldpid);
791 ptid_t get_current_thread (char *wait_status);
793 void set_thread (ptid_t ptid, int gen);
794 void set_general_thread (ptid_t ptid);
795 void set_continue_thread (ptid_t ptid);
796 void set_general_process ();
798 char *write_ptid (char *buf, const char *endbuf, ptid_t ptid);
800 int remote_unpack_thread_info_response (char *pkt, threadref *expectedref,
801 gdb_ext_thread_info *info);
802 int remote_get_threadinfo (threadref *threadid, int fieldset,
803 gdb_ext_thread_info *info);
805 int parse_threadlist_response (char *pkt, int result_limit,
806 threadref *original_echo,
807 threadref *resultlist,
809 int remote_get_threadlist (int startflag, threadref *nextthread,
810 int result_limit, int *done, int *result_count,
811 threadref *threadlist);
813 int remote_threadlist_iterator (rmt_thread_action stepfunction,
814 void *context, int looplimit);
816 int remote_get_threads_with_ql (threads_listing_context *context);
817 int remote_get_threads_with_qxfer (threads_listing_context *context);
818 int remote_get_threads_with_qthreadinfo (threads_listing_context *context);
820 void extended_remote_restart ();
824 void remote_check_symbols ();
826 void remote_supported_packet (const struct protocol_feature *feature,
827 enum packet_support support,
828 const char *argument);
830 void remote_query_supported ();
832 void remote_packet_size (const protocol_feature *feature,
833 packet_support support, const char *value);
835 void remote_serial_quit_handler ();
837 void remote_detach_pid (int pid);
839 void remote_vcont_probe ();
841 void remote_resume_with_hc (ptid_t ptid, int step,
844 void send_interrupt_sequence ();
845 void interrupt_query ();
847 void remote_notif_get_pending_events (notif_client *nc);
849 int fetch_register_using_p (struct regcache *regcache,
851 int send_g_packet ();
852 void process_g_packet (struct regcache *regcache);
853 void fetch_registers_using_g (struct regcache *regcache);
854 int store_register_using_P (const struct regcache *regcache,
856 void store_registers_using_G (const struct regcache *regcache);
858 void set_remote_traceframe ();
860 void check_binary_download (CORE_ADDR addr);
862 target_xfer_status remote_write_bytes_aux (const char *header,
864 const gdb_byte *myaddr,
867 ULONGEST *xfered_len_units,
871 target_xfer_status remote_write_bytes (CORE_ADDR memaddr,
872 const gdb_byte *myaddr, ULONGEST len,
873 int unit_size, ULONGEST *xfered_len);
875 target_xfer_status remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr,
877 int unit_size, ULONGEST *xfered_len_units);
879 target_xfer_status remote_xfer_live_readonly_partial (gdb_byte *readbuf,
883 ULONGEST *xfered_len);
885 target_xfer_status remote_read_bytes (CORE_ADDR memaddr,
886 gdb_byte *myaddr, ULONGEST len,
888 ULONGEST *xfered_len);
890 packet_result remote_send_printf (const char *format, ...)
891 ATTRIBUTE_PRINTF (2, 3);
893 target_xfer_status remote_flash_write (ULONGEST address,
894 ULONGEST length, ULONGEST *xfered_len,
895 const gdb_byte *data);
897 int readchar (int timeout);
899 void remote_serial_write (const char *str, int len);
901 int putpkt (const char *buf);
902 int putpkt_binary (const char *buf, int cnt);
905 long read_frame (char **buf_p, long *sizeof_buf);
906 void getpkt (char **buf, long *sizeof_buf, int forever);
907 int getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf, int forever,
908 int expecting_notif, int *is_notif);
909 int getpkt_sane (char **buf, long *sizeof_buf, int forever);
910 int getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever,
912 int remote_vkill (int pid);
913 void remote_kill_k ();
915 void extended_remote_disable_randomization (int val);
916 int extended_remote_run (const std::string &args);
918 void send_environment_packet (const char *action,
922 void extended_remote_environment_support ();
923 void extended_remote_set_inferior_cwd ();
925 target_xfer_status remote_write_qxfer (const char *object_name,
927 const gdb_byte *writebuf,
928 ULONGEST offset, LONGEST len,
929 ULONGEST *xfered_len,
930 struct packet_config *packet);
932 target_xfer_status remote_read_qxfer (const char *object_name,
934 gdb_byte *readbuf, ULONGEST offset,
936 ULONGEST *xfered_len,
937 struct packet_config *packet);
939 void push_stop_reply (struct stop_reply *new_event);
941 bool vcont_r_supported ();
943 void packet_command (const char *args, int from_tty);
945 private: /* data fields */
947 /* The remote state. Don't reference this directly. Use the
948 get_remote_state method instead. */
949 remote_state m_remote_state;
952 static const target_info extended_remote_target_info = {
954 N_("Extended remote serial target in gdb-specific protocol"),
958 /* Set up the extended remote target by extending the standard remote
959 target and adding to it. */
961 class extended_remote_target final : public remote_target
964 const target_info &info () const override
965 { return extended_remote_target_info; }
967 /* Open an extended-remote connection. */
968 static void open (const char *, int);
970 bool can_create_inferior () override { return true; }
971 void create_inferior (const char *, const std::string &,
972 char **, int) override;
974 void detach (inferior *, int) override;
976 bool can_attach () override { return true; }
977 void attach (const char *, int) override;
979 void post_attach (int) override;
980 bool supports_disable_randomization () override;
983 /* Per-program-space data key. */
984 static const struct program_space_data *remote_pspace_data;
986 /* The variable registered as the control variable used by the
987 remote exec-file commands. While the remote exec-file setting is
988 per-program-space, the set/show machinery uses this as the
989 location of the remote exec-file value. */
990 static char *remote_exec_file_var;
992 /* The size to align memory write packets, when practical. The protocol
993 does not guarantee any alignment, and gdb will generate short
994 writes and unaligned writes, but even as a best-effort attempt this
995 can improve bulk transfers. For instance, if a write is misaligned
996 relative to the target's data bus, the stub may need to make an extra
997 round trip fetching data from the target. This doesn't make a
998 huge difference, but it's easy to do, so we try to be helpful.
1000 The alignment chosen is arbitrary; usually data bus width is
1001 important here, not the possibly larger cache line size. */
1002 enum { REMOTE_ALIGN_WRITES = 16 };
1004 /* Prototypes for local functions. */
1006 static int hexnumlen (ULONGEST num);
1008 static int stubhex (int ch);
1010 static int hexnumstr (char *, ULONGEST);
1012 static int hexnumnstr (char *, ULONGEST, int);
1014 static CORE_ADDR remote_address_masked (CORE_ADDR);
1016 static void print_packet (const char *);
1018 static int stub_unpack_int (char *buff, int fieldlength);
1020 struct packet_config;
1022 static void show_packet_config_cmd (struct packet_config *config);
1024 static void show_remote_protocol_packet_cmd (struct ui_file *file,
1026 struct cmd_list_element *c,
1029 static ptid_t read_ptid (const char *buf, const char **obuf);
1031 static void remote_async_inferior_event_handler (gdb_client_data);
1033 static bool remote_read_description_p (struct target_ops *target);
1035 static void remote_console_output (char *msg);
1037 static void remote_btrace_reset (remote_state *rs);
1039 static void remote_unpush_and_throw (void);
1043 static struct cmd_list_element *remote_cmdlist;
1045 /* For "set remote" and "show remote". */
1047 static struct cmd_list_element *remote_set_cmdlist;
1048 static struct cmd_list_element *remote_show_cmdlist;
1050 /* Controls whether GDB is willing to use range stepping. */
1052 static int use_range_stepping = 1;
1054 /* The max number of chars in debug output. The rest of chars are
1057 #define REMOTE_DEBUG_MAX_CHAR 512
1059 /* Private data that we'll store in (struct thread_info)->priv. */
1060 struct remote_thread_info : public private_thread_info
1066 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1067 sequence of bytes. */
1068 gdb::byte_vector thread_handle;
1070 /* Whether the target stopped for a breakpoint/watchpoint. */
1071 enum target_stop_reason stop_reason = TARGET_STOPPED_BY_NO_REASON;
1073 /* This is set to the data address of the access causing the target
1074 to stop for a watchpoint. */
1075 CORE_ADDR watch_data_address = 0;
1077 /* Fields used by the vCont action coalescing implemented in
1078 remote_resume / remote_commit_resume. remote_resume stores each
1079 thread's last resume request in these fields, so that a later
1080 remote_commit_resume knows which is the proper action for this
1081 thread to include in the vCont packet. */
1083 /* True if the last target_resume call for this thread was a step
1084 request, false if a continue request. */
1085 int last_resume_step = 0;
1087 /* The signal specified in the last target_resume call for this
1089 gdb_signal last_resume_sig = GDB_SIGNAL_0;
1091 /* Whether this thread was already vCont-resumed on the remote
1093 int vcont_resumed = 0;
1096 remote_state::remote_state ()
1098 /* The default buffer size is unimportant; it will be expanded
1099 whenever a larger buffer is needed. */
1100 this->buf_size = 400;
1101 this->buf = (char *) xmalloc (this->buf_size);
1104 remote_state::~remote_state ()
1106 xfree (this->last_pass_packet);
1107 xfree (this->last_program_signals_packet);
1109 xfree (this->finished_object);
1110 xfree (this->finished_annex);
1113 /* Utility: generate error from an incoming stub packet. */
1115 trace_error (char *buf)
1118 return; /* not an error msg */
1121 case '1': /* malformed packet error */
1122 if (*++buf == '0') /* general case: */
1123 error (_("remote.c: error in outgoing packet."));
1125 error (_("remote.c: error in outgoing packet at field #%ld."),
1126 strtol (buf, NULL, 16));
1128 error (_("Target returns error code '%s'."), buf);
1132 /* Utility: wait for reply from stub, while accepting "O" packets. */
1135 remote_target::remote_get_noisy_reply ()
1137 struct remote_state *rs = get_remote_state ();
1139 do /* Loop on reply from remote stub. */
1143 QUIT; /* Allow user to bail out with ^C. */
1144 getpkt (&rs->buf, &rs->buf_size, 0);
1148 else if (startswith (buf, "qRelocInsn:"))
1151 CORE_ADDR from, to, org_to;
1153 int adjusted_size = 0;
1156 p = buf + strlen ("qRelocInsn:");
1157 pp = unpack_varlen_hex (p, &ul);
1159 error (_("invalid qRelocInsn packet: %s"), buf);
1163 unpack_varlen_hex (p, &ul);
1170 gdbarch_relocate_instruction (target_gdbarch (), &to, from);
1173 CATCH (ex, RETURN_MASK_ALL)
1175 if (ex.error == MEMORY_ERROR)
1177 /* Propagate memory errors silently back to the
1178 target. The stub may have limited the range of
1179 addresses we can write to, for example. */
1183 /* Something unexpectedly bad happened. Be verbose
1184 so we can tell what, and propagate the error back
1185 to the stub, so it doesn't get stuck waiting for
1187 exception_fprintf (gdb_stderr, ex,
1188 _("warning: relocating instruction: "));
1196 adjusted_size = to - org_to;
1198 xsnprintf (buf, rs->buf_size, "qRelocInsn:%x", adjusted_size);
1202 else if (buf[0] == 'O' && buf[1] != 'K')
1203 remote_console_output (buf + 1); /* 'O' message from stub */
1205 return buf; /* Here's the actual reply. */
1210 struct remote_arch_state *
1211 remote_state::get_remote_arch_state (struct gdbarch *gdbarch)
1213 remote_arch_state *rsa;
1215 auto it = this->m_arch_states.find (gdbarch);
1216 if (it == this->m_arch_states.end ())
1218 auto p = this->m_arch_states.emplace (std::piecewise_construct,
1219 std::forward_as_tuple (gdbarch),
1220 std::forward_as_tuple (gdbarch));
1221 rsa = &p.first->second;
1223 /* Make sure that the packet buffer is plenty big enough for
1224 this architecture. */
1225 if (this->buf_size < rsa->remote_packet_size)
1227 this->buf_size = 2 * rsa->remote_packet_size;
1228 this->buf = (char *) xrealloc (this->buf, this->buf_size);
1237 /* Fetch the global remote target state. */
1240 remote_target::get_remote_state ()
1242 /* Make sure that the remote architecture state has been
1243 initialized, because doing so might reallocate rs->buf. Any
1244 function which calls getpkt also needs to be mindful of changes
1245 to rs->buf, but this call limits the number of places which run
1247 m_remote_state.get_remote_arch_state (target_gdbarch ());
1249 return &m_remote_state;
1252 /* Cleanup routine for the remote module's pspace data. */
1255 remote_pspace_data_cleanup (struct program_space *pspace, void *arg)
1257 char *remote_exec_file = (char *) arg;
1259 xfree (remote_exec_file);
1262 /* Fetch the remote exec-file from the current program space. */
1265 get_remote_exec_file (void)
1267 char *remote_exec_file;
1270 = (char *) program_space_data (current_program_space,
1271 remote_pspace_data);
1272 if (remote_exec_file == NULL)
1275 return remote_exec_file;
1278 /* Set the remote exec file for PSPACE. */
1281 set_pspace_remote_exec_file (struct program_space *pspace,
1282 char *remote_exec_file)
1284 char *old_file = (char *) program_space_data (pspace, remote_pspace_data);
1287 set_program_space_data (pspace, remote_pspace_data,
1288 xstrdup (remote_exec_file));
1291 /* The "set/show remote exec-file" set command hook. */
1294 set_remote_exec_file (const char *ignored, int from_tty,
1295 struct cmd_list_element *c)
1297 gdb_assert (remote_exec_file_var != NULL);
1298 set_pspace_remote_exec_file (current_program_space, remote_exec_file_var);
1301 /* The "set/show remote exec-file" show command hook. */
1304 show_remote_exec_file (struct ui_file *file, int from_tty,
1305 struct cmd_list_element *cmd, const char *value)
1307 fprintf_filtered (file, "%s\n", remote_exec_file_var);
1311 compare_pnums (const void *lhs_, const void *rhs_)
1313 const struct packet_reg * const *lhs
1314 = (const struct packet_reg * const *) lhs_;
1315 const struct packet_reg * const *rhs
1316 = (const struct packet_reg * const *) rhs_;
1318 if ((*lhs)->pnum < (*rhs)->pnum)
1320 else if ((*lhs)->pnum == (*rhs)->pnum)
1327 map_regcache_remote_table (struct gdbarch *gdbarch, struct packet_reg *regs)
1329 int regnum, num_remote_regs, offset;
1330 struct packet_reg **remote_regs;
1332 for (regnum = 0; regnum < gdbarch_num_regs (gdbarch); regnum++)
1334 struct packet_reg *r = ®s[regnum];
1336 if (register_size (gdbarch, regnum) == 0)
1337 /* Do not try to fetch zero-sized (placeholder) registers. */
1340 r->pnum = gdbarch_remote_register_number (gdbarch, regnum);
1345 /* Define the g/G packet format as the contents of each register
1346 with a remote protocol number, in order of ascending protocol
1349 remote_regs = XALLOCAVEC (struct packet_reg *, gdbarch_num_regs (gdbarch));
1350 for (num_remote_regs = 0, regnum = 0;
1351 regnum < gdbarch_num_regs (gdbarch);
1353 if (regs[regnum].pnum != -1)
1354 remote_regs[num_remote_regs++] = ®s[regnum];
1356 qsort (remote_regs, num_remote_regs, sizeof (struct packet_reg *),
1359 for (regnum = 0, offset = 0; regnum < num_remote_regs; regnum++)
1361 remote_regs[regnum]->in_g_packet = 1;
1362 remote_regs[regnum]->offset = offset;
1363 offset += register_size (gdbarch, remote_regs[regnum]->regnum);
1369 /* Given the architecture described by GDBARCH, return the remote
1370 protocol register's number and the register's offset in the g/G
1371 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1372 If the target does not have a mapping for REGNUM, return false,
1373 otherwise, return true. */
1376 remote_register_number_and_offset (struct gdbarch *gdbarch, int regnum,
1377 int *pnum, int *poffset)
1379 gdb_assert (regnum < gdbarch_num_regs (gdbarch));
1381 std::vector<packet_reg> regs (gdbarch_num_regs (gdbarch));
1383 map_regcache_remote_table (gdbarch, regs.data ());
1385 *pnum = regs[regnum].pnum;
1386 *poffset = regs[regnum].offset;
1391 remote_arch_state::remote_arch_state (struct gdbarch *gdbarch)
1393 /* Use the architecture to build a regnum<->pnum table, which will be
1394 1:1 unless a feature set specifies otherwise. */
1395 this->regs.reset (new packet_reg [gdbarch_num_regs (gdbarch)] ());
1397 /* Record the maximum possible size of the g packet - it may turn out
1399 this->sizeof_g_packet
1400 = map_regcache_remote_table (gdbarch, this->regs.get ());
1402 /* Default maximum number of characters in a packet body. Many
1403 remote stubs have a hardwired buffer size of 400 bytes
1404 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1405 as the maximum packet-size to ensure that the packet and an extra
1406 NUL character can always fit in the buffer. This stops GDB
1407 trashing stubs that try to squeeze an extra NUL into what is
1408 already a full buffer (As of 1999-12-04 that was most stubs). */
1409 this->remote_packet_size = 400 - 1;
1411 /* This one is filled in when a ``g'' packet is received. */
1412 this->actual_register_packet_size = 0;
1414 /* Should rsa->sizeof_g_packet needs more space than the
1415 default, adjust the size accordingly. Remember that each byte is
1416 encoded as two characters. 32 is the overhead for the packet
1417 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1418 (``$NN:G...#NN'') is a better guess, the below has been padded a
1420 if (this->sizeof_g_packet > ((this->remote_packet_size - 32) / 2))
1421 this->remote_packet_size = (this->sizeof_g_packet * 2 + 32);
1424 /* Get a pointer to the current remote target. If not connected to a
1425 remote target, return NULL. */
1427 static remote_target *
1428 get_current_remote_target ()
1430 target_ops *proc_target = find_target_at (process_stratum);
1431 return dynamic_cast<remote_target *> (proc_target);
1434 /* Return the current allowed size of a remote packet. This is
1435 inferred from the current architecture, and should be used to
1436 limit the length of outgoing packets. */
1438 remote_target::get_remote_packet_size ()
1440 struct remote_state *rs = get_remote_state ();
1441 remote_arch_state *rsa = rs->get_remote_arch_state (target_gdbarch ());
1443 if (rs->explicit_packet_size)
1444 return rs->explicit_packet_size;
1446 return rsa->remote_packet_size;
1449 static struct packet_reg *
1450 packet_reg_from_regnum (struct gdbarch *gdbarch, struct remote_arch_state *rsa,
1453 if (regnum < 0 && regnum >= gdbarch_num_regs (gdbarch))
1457 struct packet_reg *r = &rsa->regs[regnum];
1459 gdb_assert (r->regnum == regnum);
1464 static struct packet_reg *
1465 packet_reg_from_pnum (struct gdbarch *gdbarch, struct remote_arch_state *rsa,
1470 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
1472 struct packet_reg *r = &rsa->regs[i];
1474 if (r->pnum == pnum)
1480 /* Allow the user to specify what sequence to send to the remote
1481 when he requests a program interruption: Although ^C is usually
1482 what remote systems expect (this is the default, here), it is
1483 sometimes preferable to send a break. On other systems such
1484 as the Linux kernel, a break followed by g, which is Magic SysRq g
1485 is required in order to interrupt the execution. */
1486 const char interrupt_sequence_control_c[] = "Ctrl-C";
1487 const char interrupt_sequence_break[] = "BREAK";
1488 const char interrupt_sequence_break_g[] = "BREAK-g";
1489 static const char *const interrupt_sequence_modes[] =
1491 interrupt_sequence_control_c,
1492 interrupt_sequence_break,
1493 interrupt_sequence_break_g,
1496 static const char *interrupt_sequence_mode = interrupt_sequence_control_c;
1499 show_interrupt_sequence (struct ui_file *file, int from_tty,
1500 struct cmd_list_element *c,
1503 if (interrupt_sequence_mode == interrupt_sequence_control_c)
1504 fprintf_filtered (file,
1505 _("Send the ASCII ETX character (Ctrl-c) "
1506 "to the remote target to interrupt the "
1507 "execution of the program.\n"));
1508 else if (interrupt_sequence_mode == interrupt_sequence_break)
1509 fprintf_filtered (file,
1510 _("send a break signal to the remote target "
1511 "to interrupt the execution of the program.\n"));
1512 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
1513 fprintf_filtered (file,
1514 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1515 "the remote target to interrupt the execution "
1516 "of Linux kernel.\n"));
1518 internal_error (__FILE__, __LINE__,
1519 _("Invalid value for interrupt_sequence_mode: %s."),
1520 interrupt_sequence_mode);
1523 /* This boolean variable specifies whether interrupt_sequence is sent
1524 to the remote target when gdb connects to it.
1525 This is mostly needed when you debug the Linux kernel: The Linux kernel
1526 expects BREAK g which is Magic SysRq g for connecting gdb. */
1527 static int interrupt_on_connect = 0;
1529 /* This variable is used to implement the "set/show remotebreak" commands.
1530 Since these commands are now deprecated in favor of "set/show remote
1531 interrupt-sequence", it no longer has any effect on the code. */
1532 static int remote_break;
1535 set_remotebreak (const char *args, int from_tty, struct cmd_list_element *c)
1538 interrupt_sequence_mode = interrupt_sequence_break;
1540 interrupt_sequence_mode = interrupt_sequence_control_c;
1544 show_remotebreak (struct ui_file *file, int from_tty,
1545 struct cmd_list_element *c,
1550 /* This variable sets the number of bits in an address that are to be
1551 sent in a memory ("M" or "m") packet. Normally, after stripping
1552 leading zeros, the entire address would be sent. This variable
1553 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1554 initial implementation of remote.c restricted the address sent in
1555 memory packets to ``host::sizeof long'' bytes - (typically 32
1556 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1557 address was never sent. Since fixing this bug may cause a break in
1558 some remote targets this variable is principly provided to
1559 facilitate backward compatibility. */
1561 static unsigned int remote_address_size;
1564 /* User configurable variables for the number of characters in a
1565 memory read/write packet. MIN (rsa->remote_packet_size,
1566 rsa->sizeof_g_packet) is the default. Some targets need smaller
1567 values (fifo overruns, et.al.) and some users need larger values
1568 (speed up transfers). The variables ``preferred_*'' (the user
1569 request), ``current_*'' (what was actually set) and ``forced_*''
1570 (Positive - a soft limit, negative - a hard limit). */
1572 struct memory_packet_config
1579 /* The default max memory-write-packet-size, when the setting is
1580 "fixed". The 16k is historical. (It came from older GDB's using
1581 alloca for buffers and the knowledge (folklore?) that some hosts
1582 don't cope very well with large alloca calls.) */
1583 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1585 /* The minimum remote packet size for memory transfers. Ensures we
1586 can write at least one byte. */
1587 #define MIN_MEMORY_PACKET_SIZE 20
1589 /* Get the memory packet size, assuming it is fixed. */
1592 get_fixed_memory_packet_size (struct memory_packet_config *config)
1594 gdb_assert (config->fixed_p);
1596 if (config->size <= 0)
1597 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED;
1599 return config->size;
1602 /* Compute the current size of a read/write packet. Since this makes
1603 use of ``actual_register_packet_size'' the computation is dynamic. */
1606 remote_target::get_memory_packet_size (struct memory_packet_config *config)
1608 struct remote_state *rs = get_remote_state ();
1609 remote_arch_state *rsa = rs->get_remote_arch_state (target_gdbarch ());
1612 if (config->fixed_p)
1613 what_they_get = get_fixed_memory_packet_size (config);
1616 what_they_get = get_remote_packet_size ();
1617 /* Limit the packet to the size specified by the user. */
1618 if (config->size > 0
1619 && what_they_get > config->size)
1620 what_they_get = config->size;
1622 /* Limit it to the size of the targets ``g'' response unless we have
1623 permission from the stub to use a larger packet size. */
1624 if (rs->explicit_packet_size == 0
1625 && rsa->actual_register_packet_size > 0
1626 && what_they_get > rsa->actual_register_packet_size)
1627 what_they_get = rsa->actual_register_packet_size;
1629 if (what_they_get < MIN_MEMORY_PACKET_SIZE)
1630 what_they_get = MIN_MEMORY_PACKET_SIZE;
1632 /* Make sure there is room in the global buffer for this packet
1633 (including its trailing NUL byte). */
1634 if (rs->buf_size < what_they_get + 1)
1636 rs->buf_size = 2 * what_they_get;
1637 rs->buf = (char *) xrealloc (rs->buf, 2 * what_they_get);
1640 return what_they_get;
1643 /* Update the size of a read/write packet. If they user wants
1644 something really big then do a sanity check. */
1647 set_memory_packet_size (const char *args, struct memory_packet_config *config)
1649 int fixed_p = config->fixed_p;
1650 long size = config->size;
1653 error (_("Argument required (integer, `fixed' or `limited')."));
1654 else if (strcmp (args, "hard") == 0
1655 || strcmp (args, "fixed") == 0)
1657 else if (strcmp (args, "soft") == 0
1658 || strcmp (args, "limit") == 0)
1664 size = strtoul (args, &end, 0);
1666 error (_("Invalid %s (bad syntax)."), config->name);
1668 /* Instead of explicitly capping the size of a packet to or
1669 disallowing it, the user is allowed to set the size to
1670 something arbitrarily large. */
1674 if (fixed_p && !config->fixed_p)
1676 /* So that the query shows the correct value. */
1677 long query_size = (size <= 0
1678 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1681 if (! query (_("The target may not be able to correctly handle a %s\n"
1682 "of %ld bytes. Change the packet size? "),
1683 config->name, query_size))
1684 error (_("Packet size not changed."));
1686 /* Update the config. */
1687 config->fixed_p = fixed_p;
1688 config->size = size;
1692 show_memory_packet_size (struct memory_packet_config *config)
1694 if (config->size == 0)
1695 printf_filtered (_("The %s is 0 (default). "), config->name);
1697 printf_filtered (_("The %s is %ld. "), config->name, config->size);
1698 if (config->fixed_p)
1699 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1700 get_fixed_memory_packet_size (config));
1703 remote_target *remote = get_current_remote_target ();
1706 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1707 remote->get_memory_packet_size (config));
1709 puts_filtered ("The actual limit will be further reduced "
1710 "dependent on the target.\n");
1714 static struct memory_packet_config memory_write_packet_config =
1716 "memory-write-packet-size",
1720 set_memory_write_packet_size (const char *args, int from_tty)
1722 set_memory_packet_size (args, &memory_write_packet_config);
1726 show_memory_write_packet_size (const char *args, int from_tty)
1728 show_memory_packet_size (&memory_write_packet_config);
1731 /* Show the number of hardware watchpoints that can be used. */
1734 show_hardware_watchpoint_limit (struct ui_file *file, int from_tty,
1735 struct cmd_list_element *c,
1738 fprintf_filtered (file, _("The maximum number of target hardware "
1739 "watchpoints is %s.\n"), value);
1742 /* Show the length limit (in bytes) for hardware watchpoints. */
1745 show_hardware_watchpoint_length_limit (struct ui_file *file, int from_tty,
1746 struct cmd_list_element *c,
1749 fprintf_filtered (file, _("The maximum length (in bytes) of a target "
1750 "hardware watchpoint is %s.\n"), value);
1753 /* Show the number of hardware breakpoints that can be used. */
1756 show_hardware_breakpoint_limit (struct ui_file *file, int from_tty,
1757 struct cmd_list_element *c,
1760 fprintf_filtered (file, _("The maximum number of target hardware "
1761 "breakpoints is %s.\n"), value);
1765 remote_target::get_memory_write_packet_size ()
1767 return get_memory_packet_size (&memory_write_packet_config);
1770 static struct memory_packet_config memory_read_packet_config =
1772 "memory-read-packet-size",
1776 set_memory_read_packet_size (const char *args, int from_tty)
1778 set_memory_packet_size (args, &memory_read_packet_config);
1782 show_memory_read_packet_size (const char *args, int from_tty)
1784 show_memory_packet_size (&memory_read_packet_config);
1788 remote_target::get_memory_read_packet_size ()
1790 long size = get_memory_packet_size (&memory_read_packet_config);
1792 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1793 extra buffer size argument before the memory read size can be
1794 increased beyond this. */
1795 if (size > get_remote_packet_size ())
1796 size = get_remote_packet_size ();
1802 struct packet_config
1807 /* If auto, GDB auto-detects support for this packet or feature,
1808 either through qSupported, or by trying the packet and looking
1809 at the response. If true, GDB assumes the target supports this
1810 packet. If false, the packet is disabled. Configs that don't
1811 have an associated command always have this set to auto. */
1812 enum auto_boolean detect;
1814 /* Does the target support this packet? */
1815 enum packet_support support;
1818 static enum packet_support packet_config_support (struct packet_config *config);
1819 static enum packet_support packet_support (int packet);
1822 show_packet_config_cmd (struct packet_config *config)
1824 const char *support = "internal-error";
1826 switch (packet_config_support (config))
1829 support = "enabled";
1831 case PACKET_DISABLE:
1832 support = "disabled";
1834 case PACKET_SUPPORT_UNKNOWN:
1835 support = "unknown";
1838 switch (config->detect)
1840 case AUTO_BOOLEAN_AUTO:
1841 printf_filtered (_("Support for the `%s' packet "
1842 "is auto-detected, currently %s.\n"),
1843 config->name, support);
1845 case AUTO_BOOLEAN_TRUE:
1846 case AUTO_BOOLEAN_FALSE:
1847 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1848 config->name, support);
1854 add_packet_config_cmd (struct packet_config *config, const char *name,
1855 const char *title, int legacy)
1861 config->name = name;
1862 config->title = title;
1863 set_doc = xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1865 show_doc = xstrprintf ("Show current use of remote "
1866 "protocol `%s' (%s) packet",
1868 /* set/show TITLE-packet {auto,on,off} */
1869 cmd_name = xstrprintf ("%s-packet", title);
1870 add_setshow_auto_boolean_cmd (cmd_name, class_obscure,
1871 &config->detect, set_doc,
1872 show_doc, NULL, /* help_doc */
1874 show_remote_protocol_packet_cmd,
1875 &remote_set_cmdlist, &remote_show_cmdlist);
1876 /* The command code copies the documentation strings. */
1879 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1884 legacy_name = xstrprintf ("%s-packet", name);
1885 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1886 &remote_set_cmdlist);
1887 add_alias_cmd (legacy_name, cmd_name, class_obscure, 0,
1888 &remote_show_cmdlist);
1892 static enum packet_result
1893 packet_check_result (const char *buf)
1897 /* The stub recognized the packet request. Check that the
1898 operation succeeded. */
1900 && isxdigit (buf[1]) && isxdigit (buf[2])
1902 /* "Enn" - definitly an error. */
1903 return PACKET_ERROR;
1905 /* Always treat "E." as an error. This will be used for
1906 more verbose error messages, such as E.memtypes. */
1907 if (buf[0] == 'E' && buf[1] == '.')
1908 return PACKET_ERROR;
1910 /* The packet may or may not be OK. Just assume it is. */
1914 /* The stub does not support the packet. */
1915 return PACKET_UNKNOWN;
1918 static enum packet_result
1919 packet_ok (const char *buf, struct packet_config *config)
1921 enum packet_result result;
1923 if (config->detect != AUTO_BOOLEAN_TRUE
1924 && config->support == PACKET_DISABLE)
1925 internal_error (__FILE__, __LINE__,
1926 _("packet_ok: attempt to use a disabled packet"));
1928 result = packet_check_result (buf);
1933 /* The stub recognized the packet request. */
1934 if (config->support == PACKET_SUPPORT_UNKNOWN)
1937 fprintf_unfiltered (gdb_stdlog,
1938 "Packet %s (%s) is supported\n",
1939 config->name, config->title);
1940 config->support = PACKET_ENABLE;
1943 case PACKET_UNKNOWN:
1944 /* The stub does not support the packet. */
1945 if (config->detect == AUTO_BOOLEAN_AUTO
1946 && config->support == PACKET_ENABLE)
1948 /* If the stub previously indicated that the packet was
1949 supported then there is a protocol error. */
1950 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1951 config->name, config->title);
1953 else if (config->detect == AUTO_BOOLEAN_TRUE)
1955 /* The user set it wrong. */
1956 error (_("Enabled packet %s (%s) not recognized by stub"),
1957 config->name, config->title);
1961 fprintf_unfiltered (gdb_stdlog,
1962 "Packet %s (%s) is NOT supported\n",
1963 config->name, config->title);
1964 config->support = PACKET_DISABLE;
1985 PACKET_vFile_pwrite,
1987 PACKET_vFile_unlink,
1988 PACKET_vFile_readlink,
1991 PACKET_qXfer_features,
1992 PACKET_qXfer_exec_file,
1993 PACKET_qXfer_libraries,
1994 PACKET_qXfer_libraries_svr4,
1995 PACKET_qXfer_memory_map,
1996 PACKET_qXfer_spu_read,
1997 PACKET_qXfer_spu_write,
1998 PACKET_qXfer_osdata,
1999 PACKET_qXfer_threads,
2000 PACKET_qXfer_statictrace_read,
2001 PACKET_qXfer_traceframe_info,
2007 PACKET_QPassSignals,
2008 PACKET_QCatchSyscalls,
2009 PACKET_QProgramSignals,
2010 PACKET_QSetWorkingDir,
2011 PACKET_QStartupWithShell,
2012 PACKET_QEnvironmentHexEncoded,
2013 PACKET_QEnvironmentReset,
2014 PACKET_QEnvironmentUnset,
2016 PACKET_qSearch_memory,
2019 PACKET_QStartNoAckMode,
2021 PACKET_qXfer_siginfo_read,
2022 PACKET_qXfer_siginfo_write,
2025 /* Support for conditional tracepoints. */
2026 PACKET_ConditionalTracepoints,
2028 /* Support for target-side breakpoint conditions. */
2029 PACKET_ConditionalBreakpoints,
2031 /* Support for target-side breakpoint commands. */
2032 PACKET_BreakpointCommands,
2034 /* Support for fast tracepoints. */
2035 PACKET_FastTracepoints,
2037 /* Support for static tracepoints. */
2038 PACKET_StaticTracepoints,
2040 /* Support for installing tracepoints while a trace experiment is
2042 PACKET_InstallInTrace,
2046 PACKET_TracepointSource,
2049 PACKET_QDisableRandomization,
2051 PACKET_QTBuffer_size,
2055 PACKET_qXfer_btrace,
2057 /* Support for the QNonStop packet. */
2060 /* Support for the QThreadEvents packet. */
2061 PACKET_QThreadEvents,
2063 /* Support for multi-process extensions. */
2064 PACKET_multiprocess_feature,
2066 /* Support for enabling and disabling tracepoints while a trace
2067 experiment is running. */
2068 PACKET_EnableDisableTracepoints_feature,
2070 /* Support for collecting strings using the tracenz bytecode. */
2071 PACKET_tracenz_feature,
2073 /* Support for continuing to run a trace experiment while GDB is
2075 PACKET_DisconnectedTracing_feature,
2077 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2078 PACKET_augmented_libraries_svr4_read_feature,
2080 /* Support for the qXfer:btrace-conf:read packet. */
2081 PACKET_qXfer_btrace_conf,
2083 /* Support for the Qbtrace-conf:bts:size packet. */
2084 PACKET_Qbtrace_conf_bts_size,
2086 /* Support for swbreak+ feature. */
2087 PACKET_swbreak_feature,
2089 /* Support for hwbreak+ feature. */
2090 PACKET_hwbreak_feature,
2092 /* Support for fork events. */
2093 PACKET_fork_event_feature,
2095 /* Support for vfork events. */
2096 PACKET_vfork_event_feature,
2098 /* Support for the Qbtrace-conf:pt:size packet. */
2099 PACKET_Qbtrace_conf_pt_size,
2101 /* Support for exec events. */
2102 PACKET_exec_event_feature,
2104 /* Support for query supported vCont actions. */
2105 PACKET_vContSupported,
2107 /* Support remote CTRL-C. */
2110 /* Support TARGET_WAITKIND_NO_RESUMED. */
2116 static struct packet_config remote_protocol_packets[PACKET_MAX];
2118 /* Returns the packet's corresponding "set remote foo-packet" command
2119 state. See struct packet_config for more details. */
2121 static enum auto_boolean
2122 packet_set_cmd_state (int packet)
2124 return remote_protocol_packets[packet].detect;
2127 /* Returns whether a given packet or feature is supported. This takes
2128 into account the state of the corresponding "set remote foo-packet"
2129 command, which may be used to bypass auto-detection. */
2131 static enum packet_support
2132 packet_config_support (struct packet_config *config)
2134 switch (config->detect)
2136 case AUTO_BOOLEAN_TRUE:
2137 return PACKET_ENABLE;
2138 case AUTO_BOOLEAN_FALSE:
2139 return PACKET_DISABLE;
2140 case AUTO_BOOLEAN_AUTO:
2141 return config->support;
2143 gdb_assert_not_reached (_("bad switch"));
2147 /* Same as packet_config_support, but takes the packet's enum value as
2150 static enum packet_support
2151 packet_support (int packet)
2153 struct packet_config *config = &remote_protocol_packets[packet];
2155 return packet_config_support (config);
2159 show_remote_protocol_packet_cmd (struct ui_file *file, int from_tty,
2160 struct cmd_list_element *c,
2163 struct packet_config *packet;
2165 for (packet = remote_protocol_packets;
2166 packet < &remote_protocol_packets[PACKET_MAX];
2169 if (&packet->detect == c->var)
2171 show_packet_config_cmd (packet);
2175 internal_error (__FILE__, __LINE__, _("Could not find config for %s"),
2179 /* Should we try one of the 'Z' requests? */
2183 Z_PACKET_SOFTWARE_BP,
2184 Z_PACKET_HARDWARE_BP,
2191 /* For compatibility with older distributions. Provide a ``set remote
2192 Z-packet ...'' command that updates all the Z packet types. */
2194 static enum auto_boolean remote_Z_packet_detect;
2197 set_remote_protocol_Z_packet_cmd (const char *args, int from_tty,
2198 struct cmd_list_element *c)
2202 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
2203 remote_protocol_packets[PACKET_Z0 + i].detect = remote_Z_packet_detect;
2207 show_remote_protocol_Z_packet_cmd (struct ui_file *file, int from_tty,
2208 struct cmd_list_element *c,
2213 for (i = 0; i < NR_Z_PACKET_TYPES; i++)
2215 show_packet_config_cmd (&remote_protocol_packets[PACKET_Z0 + i]);
2219 /* Returns true if the multi-process extensions are in effect. */
2222 remote_multi_process_p (struct remote_state *rs)
2224 return packet_support (PACKET_multiprocess_feature) == PACKET_ENABLE;
2227 /* Returns true if fork events are supported. */
2230 remote_fork_event_p (struct remote_state *rs)
2232 return packet_support (PACKET_fork_event_feature) == PACKET_ENABLE;
2235 /* Returns true if vfork events are supported. */
2238 remote_vfork_event_p (struct remote_state *rs)
2240 return packet_support (PACKET_vfork_event_feature) == PACKET_ENABLE;
2243 /* Returns true if exec events are supported. */
2246 remote_exec_event_p (struct remote_state *rs)
2248 return packet_support (PACKET_exec_event_feature) == PACKET_ENABLE;
2251 /* Insert fork catchpoint target routine. If fork events are enabled
2252 then return success, nothing more to do. */
2255 remote_target::insert_fork_catchpoint (int pid)
2257 struct remote_state *rs = get_remote_state ();
2259 return !remote_fork_event_p (rs);
2262 /* Remove fork catchpoint target routine. Nothing to do, just
2266 remote_target::remove_fork_catchpoint (int pid)
2271 /* Insert vfork catchpoint target routine. If vfork events are enabled
2272 then return success, nothing more to do. */
2275 remote_target::insert_vfork_catchpoint (int pid)
2277 struct remote_state *rs = get_remote_state ();
2279 return !remote_vfork_event_p (rs);
2282 /* Remove vfork catchpoint target routine. Nothing to do, just
2286 remote_target::remove_vfork_catchpoint (int pid)
2291 /* Insert exec catchpoint target routine. If exec events are
2292 enabled, just return success. */
2295 remote_target::insert_exec_catchpoint (int pid)
2297 struct remote_state *rs = get_remote_state ();
2299 return !remote_exec_event_p (rs);
2302 /* Remove exec catchpoint target routine. Nothing to do, just
2306 remote_target::remove_exec_catchpoint (int pid)
2313 static ptid_t magic_null_ptid;
2314 static ptid_t not_sent_ptid;
2315 static ptid_t any_thread_ptid;
2317 /* Find out if the stub attached to PID (and hence GDB should offer to
2318 detach instead of killing it when bailing out). */
2321 remote_target::remote_query_attached (int pid)
2323 struct remote_state *rs = get_remote_state ();
2324 size_t size = get_remote_packet_size ();
2326 if (packet_support (PACKET_qAttached) == PACKET_DISABLE)
2329 if (remote_multi_process_p (rs))
2330 xsnprintf (rs->buf, size, "qAttached:%x", pid);
2332 xsnprintf (rs->buf, size, "qAttached");
2335 getpkt (&rs->buf, &rs->buf_size, 0);
2337 switch (packet_ok (rs->buf,
2338 &remote_protocol_packets[PACKET_qAttached]))
2341 if (strcmp (rs->buf, "1") == 0)
2345 warning (_("Remote failure reply: %s"), rs->buf);
2347 case PACKET_UNKNOWN:
2354 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2355 has been invented by GDB, instead of reported by the target. Since
2356 we can be connected to a remote system before before knowing about
2357 any inferior, mark the target with execution when we find the first
2358 inferior. If ATTACHED is 1, then we had just attached to this
2359 inferior. If it is 0, then we just created this inferior. If it
2360 is -1, then try querying the remote stub to find out if it had
2361 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2362 attempt to open this inferior's executable as the main executable
2363 if no main executable is open already. */
2366 remote_target::remote_add_inferior (int fake_pid_p, int pid, int attached,
2369 struct inferior *inf;
2371 /* Check whether this process we're learning about is to be
2372 considered attached, or if is to be considered to have been
2373 spawned by the stub. */
2375 attached = remote_query_attached (pid);
2377 if (gdbarch_has_global_solist (target_gdbarch ()))
2379 /* If the target shares code across all inferiors, then every
2380 attach adds a new inferior. */
2381 inf = add_inferior (pid);
2383 /* ... and every inferior is bound to the same program space.
2384 However, each inferior may still have its own address
2386 inf->aspace = maybe_new_address_space ();
2387 inf->pspace = current_program_space;
2391 /* In the traditional debugging scenario, there's a 1-1 match
2392 between program/address spaces. We simply bind the inferior
2393 to the program space's address space. */
2394 inf = current_inferior ();
2395 inferior_appeared (inf, pid);
2398 inf->attach_flag = attached;
2399 inf->fake_pid_p = fake_pid_p;
2401 /* If no main executable is currently open then attempt to
2402 open the file that was executed to create this inferior. */
2403 if (try_open_exec && get_exec_file (0) == NULL)
2404 exec_file_locate_attach (pid, 0, 1);
2409 static remote_thread_info *get_remote_thread_info (thread_info *thread);
2410 static remote_thread_info *get_remote_thread_info (ptid_t ptid);
2412 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2413 according to RUNNING. */
2416 remote_target::remote_add_thread (ptid_t ptid, bool running, bool executing)
2418 struct remote_state *rs = get_remote_state ();
2419 struct thread_info *thread;
2421 /* GDB historically didn't pull threads in the initial connection
2422 setup. If the remote target doesn't even have a concept of
2423 threads (e.g., a bare-metal target), even if internally we
2424 consider that a single-threaded target, mentioning a new thread
2425 might be confusing to the user. Be silent then, preserving the
2426 age old behavior. */
2427 if (rs->starting_up)
2428 thread = add_thread_silent (ptid);
2430 thread = add_thread (ptid);
2432 get_remote_thread_info (thread)->vcont_resumed = executing;
2433 set_executing (ptid, executing);
2434 set_running (ptid, running);
2439 /* Come here when we learn about a thread id from the remote target.
2440 It may be the first time we hear about such thread, so take the
2441 opportunity to add it to GDB's thread list. In case this is the
2442 first time we're noticing its corresponding inferior, add it to
2443 GDB's inferior list as well. EXECUTING indicates whether the
2444 thread is (internally) executing or stopped. */
2447 remote_target::remote_notice_new_inferior (ptid_t currthread, int executing)
2449 /* In non-stop mode, we assume new found threads are (externally)
2450 running until proven otherwise with a stop reply. In all-stop,
2451 we can only get here if all threads are stopped. */
2452 int running = target_is_non_stop_p () ? 1 : 0;
2454 /* If this is a new thread, add it to GDB's thread list.
2455 If we leave it up to WFI to do this, bad things will happen. */
2457 thread_info *tp = find_thread_ptid (currthread);
2458 if (tp != NULL && tp->state == THREAD_EXITED)
2460 /* We're seeing an event on a thread id we knew had exited.
2461 This has to be a new thread reusing the old id. Add it. */
2462 remote_add_thread (currthread, running, executing);
2466 if (!in_thread_list (currthread))
2468 struct inferior *inf = NULL;
2469 int pid = currthread.pid ();
2471 if (inferior_ptid.is_pid ()
2472 && pid == inferior_ptid.pid ())
2474 /* inferior_ptid has no thread member yet. This can happen
2475 with the vAttach -> remote_wait,"TAAthread:" path if the
2476 stub doesn't support qC. This is the first stop reported
2477 after an attach, so this is the main thread. Update the
2478 ptid in the thread list. */
2479 if (in_thread_list (ptid_t (pid)))
2480 thread_change_ptid (inferior_ptid, currthread);
2483 remote_add_thread (currthread, running, executing);
2484 inferior_ptid = currthread;
2489 if (magic_null_ptid == inferior_ptid)
2491 /* inferior_ptid is not set yet. This can happen with the
2492 vRun -> remote_wait,"TAAthread:" path if the stub
2493 doesn't support qC. This is the first stop reported
2494 after an attach, so this is the main thread. Update the
2495 ptid in the thread list. */
2496 thread_change_ptid (inferior_ptid, currthread);
2500 /* When connecting to a target remote, or to a target
2501 extended-remote which already was debugging an inferior, we
2502 may not know about it yet. Add it before adding its child
2503 thread, so notifications are emitted in a sensible order. */
2504 if (find_inferior_pid (currthread.pid ()) == NULL)
2506 struct remote_state *rs = get_remote_state ();
2507 int fake_pid_p = !remote_multi_process_p (rs);
2509 inf = remote_add_inferior (fake_pid_p,
2510 currthread.pid (), -1, 1);
2513 /* This is really a new thread. Add it. */
2514 thread_info *new_thr
2515 = remote_add_thread (currthread, running, executing);
2517 /* If we found a new inferior, let the common code do whatever
2518 it needs to with it (e.g., read shared libraries, insert
2519 breakpoints), unless we're just setting up an all-stop
2523 struct remote_state *rs = get_remote_state ();
2525 if (!rs->starting_up)
2526 notice_new_inferior (new_thr, executing, 0);
2531 /* Return THREAD's private thread data, creating it if necessary. */
2533 static remote_thread_info *
2534 get_remote_thread_info (thread_info *thread)
2536 gdb_assert (thread != NULL);
2538 if (thread->priv == NULL)
2539 thread->priv.reset (new remote_thread_info);
2541 return static_cast<remote_thread_info *> (thread->priv.get ());
2544 static remote_thread_info *
2545 get_remote_thread_info (ptid_t ptid)
2547 thread_info *thr = find_thread_ptid (ptid);
2548 return get_remote_thread_info (thr);
2551 /* Call this function as a result of
2552 1) A halt indication (T packet) containing a thread id
2553 2) A direct query of currthread
2554 3) Successful execution of set thread */
2557 record_currthread (struct remote_state *rs, ptid_t currthread)
2559 rs->general_thread = currthread;
2562 /* If 'QPassSignals' is supported, tell the remote stub what signals
2563 it can simply pass through to the inferior without reporting. */
2566 remote_target::pass_signals (int numsigs, unsigned char *pass_signals)
2568 if (packet_support (PACKET_QPassSignals) != PACKET_DISABLE)
2570 char *pass_packet, *p;
2572 struct remote_state *rs = get_remote_state ();
2574 gdb_assert (numsigs < 256);
2575 for (i = 0; i < numsigs; i++)
2577 if (pass_signals[i])
2580 pass_packet = (char *) xmalloc (count * 3 + strlen ("QPassSignals:") + 1);
2581 strcpy (pass_packet, "QPassSignals:");
2582 p = pass_packet + strlen (pass_packet);
2583 for (i = 0; i < numsigs; i++)
2585 if (pass_signals[i])
2588 *p++ = tohex (i >> 4);
2589 *p++ = tohex (i & 15);
2598 if (!rs->last_pass_packet || strcmp (rs->last_pass_packet, pass_packet))
2600 putpkt (pass_packet);
2601 getpkt (&rs->buf, &rs->buf_size, 0);
2602 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QPassSignals]);
2603 if (rs->last_pass_packet)
2604 xfree (rs->last_pass_packet);
2605 rs->last_pass_packet = pass_packet;
2608 xfree (pass_packet);
2612 /* If 'QCatchSyscalls' is supported, tell the remote stub
2613 to report syscalls to GDB. */
2616 remote_target::set_syscall_catchpoint (int pid, bool needed, int any_count,
2617 gdb::array_view<const int> syscall_counts)
2619 const char *catch_packet;
2620 enum packet_result result;
2623 if (packet_support (PACKET_QCatchSyscalls) == PACKET_DISABLE)
2625 /* Not supported. */
2629 if (needed && any_count == 0)
2631 /* Count how many syscalls are to be caught. */
2632 for (size_t i = 0; i < syscall_counts.size (); i++)
2634 if (syscall_counts[i] != 0)
2641 fprintf_unfiltered (gdb_stdlog,
2642 "remote_set_syscall_catchpoint "
2643 "pid %d needed %d any_count %d n_sysno %d\n",
2644 pid, needed, any_count, n_sysno);
2647 std::string built_packet;
2650 /* Prepare a packet with the sysno list, assuming max 8+1
2651 characters for a sysno. If the resulting packet size is too
2652 big, fallback on the non-selective packet. */
2653 const int maxpktsz = strlen ("QCatchSyscalls:1") + n_sysno * 9 + 1;
2654 built_packet.reserve (maxpktsz);
2655 built_packet = "QCatchSyscalls:1";
2658 /* Add in each syscall to be caught. */
2659 for (size_t i = 0; i < syscall_counts.size (); i++)
2661 if (syscall_counts[i] != 0)
2662 string_appendf (built_packet, ";%zx", i);
2665 if (built_packet.size () > get_remote_packet_size ())
2667 /* catch_packet too big. Fallback to less efficient
2668 non selective mode, with GDB doing the filtering. */
2669 catch_packet = "QCatchSyscalls:1";
2672 catch_packet = built_packet.c_str ();
2675 catch_packet = "QCatchSyscalls:0";
2677 struct remote_state *rs = get_remote_state ();
2679 putpkt (catch_packet);
2680 getpkt (&rs->buf, &rs->buf_size, 0);
2681 result = packet_ok (rs->buf, &remote_protocol_packets[PACKET_QCatchSyscalls]);
2682 if (result == PACKET_OK)
2688 /* If 'QProgramSignals' is supported, tell the remote stub what
2689 signals it should pass through to the inferior when detaching. */
2692 remote_target::program_signals (int numsigs, unsigned char *signals)
2694 if (packet_support (PACKET_QProgramSignals) != PACKET_DISABLE)
2698 struct remote_state *rs = get_remote_state ();
2700 gdb_assert (numsigs < 256);
2701 for (i = 0; i < numsigs; i++)
2706 packet = (char *) xmalloc (count * 3 + strlen ("QProgramSignals:") + 1);
2707 strcpy (packet, "QProgramSignals:");
2708 p = packet + strlen (packet);
2709 for (i = 0; i < numsigs; i++)
2711 if (signal_pass_state (i))
2714 *p++ = tohex (i >> 4);
2715 *p++ = tohex (i & 15);
2724 if (!rs->last_program_signals_packet
2725 || strcmp (rs->last_program_signals_packet, packet) != 0)
2728 getpkt (&rs->buf, &rs->buf_size, 0);
2729 packet_ok (rs->buf, &remote_protocol_packets[PACKET_QProgramSignals]);
2730 xfree (rs->last_program_signals_packet);
2731 rs->last_program_signals_packet = packet;
2738 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2739 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2740 thread. If GEN is set, set the general thread, if not, then set
2741 the step/continue thread. */
2743 remote_target::set_thread (ptid_t ptid, int gen)
2745 struct remote_state *rs = get_remote_state ();
2746 ptid_t state = gen ? rs->general_thread : rs->continue_thread;
2747 char *buf = rs->buf;
2748 char *endbuf = rs->buf + get_remote_packet_size ();
2754 *buf++ = gen ? 'g' : 'c';
2755 if (ptid == magic_null_ptid)
2756 xsnprintf (buf, endbuf - buf, "0");
2757 else if (ptid == any_thread_ptid)
2758 xsnprintf (buf, endbuf - buf, "0");
2759 else if (ptid == minus_one_ptid)
2760 xsnprintf (buf, endbuf - buf, "-1");
2762 write_ptid (buf, endbuf, ptid);
2764 getpkt (&rs->buf, &rs->buf_size, 0);
2766 rs->general_thread = ptid;
2768 rs->continue_thread = ptid;
2772 remote_target::set_general_thread (ptid_t ptid)
2774 set_thread (ptid, 1);
2778 remote_target::set_continue_thread (ptid_t ptid)
2780 set_thread (ptid, 0);
2783 /* Change the remote current process. Which thread within the process
2784 ends up selected isn't important, as long as it is the same process
2785 as what INFERIOR_PTID points to.
2787 This comes from that fact that there is no explicit notion of
2788 "selected process" in the protocol. The selected process for
2789 general operations is the process the selected general thread
2793 remote_target::set_general_process ()
2795 struct remote_state *rs = get_remote_state ();
2797 /* If the remote can't handle multiple processes, don't bother. */
2798 if (!remote_multi_process_p (rs))
2801 /* We only need to change the remote current thread if it's pointing
2802 at some other process. */
2803 if (rs->general_thread.pid () != inferior_ptid.pid ())
2804 set_general_thread (inferior_ptid);
2808 /* Return nonzero if this is the main thread that we made up ourselves
2809 to model non-threaded targets as single-threaded. */
2812 remote_thread_always_alive (ptid_t ptid)
2814 if (ptid == magic_null_ptid)
2815 /* The main thread is always alive. */
2818 if (ptid.pid () != 0 && ptid.lwp () == 0)
2819 /* The main thread is always alive. This can happen after a
2820 vAttach, if the remote side doesn't support
2827 /* Return nonzero if the thread PTID is still alive on the remote
2831 remote_target::thread_alive (ptid_t ptid)
2833 struct remote_state *rs = get_remote_state ();
2836 /* Check if this is a thread that we made up ourselves to model
2837 non-threaded targets as single-threaded. */
2838 if (remote_thread_always_alive (ptid))
2842 endp = rs->buf + get_remote_packet_size ();
2845 write_ptid (p, endp, ptid);
2848 getpkt (&rs->buf, &rs->buf_size, 0);
2849 return (rs->buf[0] == 'O' && rs->buf[1] == 'K');
2852 /* Return a pointer to a thread name if we know it and NULL otherwise.
2853 The thread_info object owns the memory for the name. */
2856 remote_target::thread_name (struct thread_info *info)
2858 if (info->priv != NULL)
2860 const std::string &name = get_remote_thread_info (info)->name;
2861 return !name.empty () ? name.c_str () : NULL;
2867 /* About these extended threadlist and threadinfo packets. They are
2868 variable length packets but, the fields within them are often fixed
2869 length. They are redundent enough to send over UDP as is the
2870 remote protocol in general. There is a matching unit test module
2873 /* WARNING: This threadref data structure comes from the remote O.S.,
2874 libstub protocol encoding, and remote.c. It is not particularly
2877 /* Right now, the internal structure is int. We want it to be bigger.
2878 Plan to fix this. */
2880 typedef int gdb_threadref; /* Internal GDB thread reference. */
2882 /* gdb_ext_thread_info is an internal GDB data structure which is
2883 equivalent to the reply of the remote threadinfo packet. */
2885 struct gdb_ext_thread_info
2887 threadref threadid; /* External form of thread reference. */
2888 int active; /* Has state interesting to GDB?
2890 char display[256]; /* Brief state display, name,
2891 blocked/suspended. */
2892 char shortname[32]; /* To be used to name threads. */
2893 char more_display[256]; /* Long info, statistics, queue depth,
2897 /* The volume of remote transfers can be limited by submitting
2898 a mask containing bits specifying the desired information.
2899 Use a union of these values as the 'selection' parameter to
2900 get_thread_info. FIXME: Make these TAG names more thread specific. */
2902 #define TAG_THREADID 1
2903 #define TAG_EXISTS 2
2904 #define TAG_DISPLAY 4
2905 #define TAG_THREADNAME 8
2906 #define TAG_MOREDISPLAY 16
2908 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2910 static char *unpack_nibble (char *buf, int *val);
2912 static char *unpack_byte (char *buf, int *value);
2914 static char *pack_int (char *buf, int value);
2916 static char *unpack_int (char *buf, int *value);
2918 static char *unpack_string (char *src, char *dest, int length);
2920 static char *pack_threadid (char *pkt, threadref *id);
2922 static char *unpack_threadid (char *inbuf, threadref *id);
2924 void int_to_threadref (threadref *id, int value);
2926 static int threadref_to_int (threadref *ref);
2928 static void copy_threadref (threadref *dest, threadref *src);
2930 static int threadmatch (threadref *dest, threadref *src);
2932 static char *pack_threadinfo_request (char *pkt, int mode,
2935 static char *pack_threadlist_request (char *pkt, int startflag,
2937 threadref *nextthread);
2939 static int remote_newthread_step (threadref *ref, void *context);
2942 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2943 buffer we're allowed to write to. Returns
2944 BUF+CHARACTERS_WRITTEN. */
2947 remote_target::write_ptid (char *buf, const char *endbuf, ptid_t ptid)
2950 struct remote_state *rs = get_remote_state ();
2952 if (remote_multi_process_p (rs))
2956 buf += xsnprintf (buf, endbuf - buf, "p-%x.", -pid);
2958 buf += xsnprintf (buf, endbuf - buf, "p%x.", pid);
2962 buf += xsnprintf (buf, endbuf - buf, "-%x", -tid);
2964 buf += xsnprintf (buf, endbuf - buf, "%x", tid);
2969 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2970 last parsed char. Returns null_ptid if no thread id is found, and
2971 throws an error if the thread id has an invalid format. */
2974 read_ptid (const char *buf, const char **obuf)
2976 const char *p = buf;
2978 ULONGEST pid = 0, tid = 0;
2982 /* Multi-process ptid. */
2983 pp = unpack_varlen_hex (p + 1, &pid);
2985 error (_("invalid remote ptid: %s"), p);
2988 pp = unpack_varlen_hex (p + 1, &tid);
2991 return ptid_t (pid, tid, 0);
2994 /* No multi-process. Just a tid. */
2995 pp = unpack_varlen_hex (p, &tid);
2997 /* Return null_ptid when no thread id is found. */
3005 /* Since the stub is not sending a process id, then default to
3006 what's in inferior_ptid, unless it's null at this point. If so,
3007 then since there's no way to know the pid of the reported
3008 threads, use the magic number. */
3009 if (inferior_ptid == null_ptid)
3010 pid = magic_null_ptid.pid ();
3012 pid = inferior_ptid.pid ();
3016 return ptid_t (pid, tid, 0);
3022 if (ch >= 'a' && ch <= 'f')
3023 return ch - 'a' + 10;
3024 if (ch >= '0' && ch <= '9')
3026 if (ch >= 'A' && ch <= 'F')
3027 return ch - 'A' + 10;
3032 stub_unpack_int (char *buff, int fieldlength)
3039 nibble = stubhex (*buff++);
3043 retval = retval << 4;
3049 unpack_nibble (char *buf, int *val)
3051 *val = fromhex (*buf++);
3056 unpack_byte (char *buf, int *value)
3058 *value = stub_unpack_int (buf, 2);
3063 pack_int (char *buf, int value)
3065 buf = pack_hex_byte (buf, (value >> 24) & 0xff);
3066 buf = pack_hex_byte (buf, (value >> 16) & 0xff);
3067 buf = pack_hex_byte (buf, (value >> 8) & 0x0ff);
3068 buf = pack_hex_byte (buf, (value & 0xff));
3073 unpack_int (char *buf, int *value)
3075 *value = stub_unpack_int (buf, 8);
3079 #if 0 /* Currently unused, uncomment when needed. */
3080 static char *pack_string (char *pkt, char *string);
3083 pack_string (char *pkt, char *string)
3088 len = strlen (string);
3090 len = 200; /* Bigger than most GDB packets, junk??? */
3091 pkt = pack_hex_byte (pkt, len);
3095 if ((ch == '\0') || (ch == '#'))
3096 ch = '*'; /* Protect encapsulation. */
3101 #endif /* 0 (unused) */
3104 unpack_string (char *src, char *dest, int length)
3113 pack_threadid (char *pkt, threadref *id)
3116 unsigned char *altid;
3118 altid = (unsigned char *) id;
3119 limit = pkt + BUF_THREAD_ID_SIZE;
3121 pkt = pack_hex_byte (pkt, *altid++);
3127 unpack_threadid (char *inbuf, threadref *id)
3130 char *limit = inbuf + BUF_THREAD_ID_SIZE;
3133 altref = (char *) id;
3135 while (inbuf < limit)
3137 x = stubhex (*inbuf++);
3138 y = stubhex (*inbuf++);
3139 *altref++ = (x << 4) | y;
3144 /* Externally, threadrefs are 64 bits but internally, they are still
3145 ints. This is due to a mismatch of specifications. We would like
3146 to use 64bit thread references internally. This is an adapter
3150 int_to_threadref (threadref *id, int value)
3152 unsigned char *scan;
3154 scan = (unsigned char *) id;
3160 *scan++ = (value >> 24) & 0xff;
3161 *scan++ = (value >> 16) & 0xff;
3162 *scan++ = (value >> 8) & 0xff;
3163 *scan++ = (value & 0xff);
3167 threadref_to_int (threadref *ref)
3170 unsigned char *scan;
3176 value = (value << 8) | ((*scan++) & 0xff);
3181 copy_threadref (threadref *dest, threadref *src)
3184 unsigned char *csrc, *cdest;
3186 csrc = (unsigned char *) src;
3187 cdest = (unsigned char *) dest;
3194 threadmatch (threadref *dest, threadref *src)
3196 /* Things are broken right now, so just assume we got a match. */
3198 unsigned char *srcp, *destp;
3200 srcp = (char *) src;
3201 destp = (char *) dest;
3205 result &= (*srcp++ == *destp++) ? 1 : 0;
3212 threadid:1, # always request threadid
3219 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3222 pack_threadinfo_request (char *pkt, int mode, threadref *id)
3224 *pkt++ = 'q'; /* Info Query */
3225 *pkt++ = 'P'; /* process or thread info */
3226 pkt = pack_int (pkt, mode); /* mode */
3227 pkt = pack_threadid (pkt, id); /* threadid */
3228 *pkt = '\0'; /* terminate */
3232 /* These values tag the fields in a thread info response packet. */
3233 /* Tagging the fields allows us to request specific fields and to
3234 add more fields as time goes by. */
3236 #define TAG_THREADID 1 /* Echo the thread identifier. */
3237 #define TAG_EXISTS 2 /* Is this process defined enough to
3238 fetch registers and its stack? */
3239 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3240 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3241 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3245 remote_target::remote_unpack_thread_info_response (char *pkt,
3246 threadref *expectedref,
3247 gdb_ext_thread_info *info)
3249 struct remote_state *rs = get_remote_state ();
3253 char *limit = pkt + rs->buf_size; /* Plausible parsing limit. */
3256 /* info->threadid = 0; FIXME: implement zero_threadref. */
3258 info->display[0] = '\0';
3259 info->shortname[0] = '\0';
3260 info->more_display[0] = '\0';
3262 /* Assume the characters indicating the packet type have been
3264 pkt = unpack_int (pkt, &mask); /* arg mask */
3265 pkt = unpack_threadid (pkt, &ref);
3268 warning (_("Incomplete response to threadinfo request."));
3269 if (!threadmatch (&ref, expectedref))
3270 { /* This is an answer to a different request. */
3271 warning (_("ERROR RMT Thread info mismatch."));
3274 copy_threadref (&info->threadid, &ref);
3276 /* Loop on tagged fields , try to bail if somthing goes wrong. */
3278 /* Packets are terminated with nulls. */
3279 while ((pkt < limit) && mask && *pkt)
3281 pkt = unpack_int (pkt, &tag); /* tag */
3282 pkt = unpack_byte (pkt, &length); /* length */
3283 if (!(tag & mask)) /* Tags out of synch with mask. */
3285 warning (_("ERROR RMT: threadinfo tag mismatch."));
3289 if (tag == TAG_THREADID)
3293 warning (_("ERROR RMT: length of threadid is not 16."));
3297 pkt = unpack_threadid (pkt, &ref);
3298 mask = mask & ~TAG_THREADID;
3301 if (tag == TAG_EXISTS)
3303 info->active = stub_unpack_int (pkt, length);
3305 mask = mask & ~(TAG_EXISTS);
3308 warning (_("ERROR RMT: 'exists' length too long."));
3314 if (tag == TAG_THREADNAME)
3316 pkt = unpack_string (pkt, &info->shortname[0], length);
3317 mask = mask & ~TAG_THREADNAME;
3320 if (tag == TAG_DISPLAY)
3322 pkt = unpack_string (pkt, &info->display[0], length);
3323 mask = mask & ~TAG_DISPLAY;
3326 if (tag == TAG_MOREDISPLAY)
3328 pkt = unpack_string (pkt, &info->more_display[0], length);
3329 mask = mask & ~TAG_MOREDISPLAY;
3332 warning (_("ERROR RMT: unknown thread info tag."));
3333 break; /* Not a tag we know about. */
3339 remote_target::remote_get_threadinfo (threadref *threadid,
3341 gdb_ext_thread_info *info)
3343 struct remote_state *rs = get_remote_state ();
3346 pack_threadinfo_request (rs->buf, fieldset, threadid);
3348 getpkt (&rs->buf, &rs->buf_size, 0);
3350 if (rs->buf[0] == '\0')
3353 result = remote_unpack_thread_info_response (rs->buf + 2,
3358 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3361 pack_threadlist_request (char *pkt, int startflag, int threadcount,
3362 threadref *nextthread)
3364 *pkt++ = 'q'; /* info query packet */
3365 *pkt++ = 'L'; /* Process LIST or threadLIST request */
3366 pkt = pack_nibble (pkt, startflag); /* initflag 1 bytes */
3367 pkt = pack_hex_byte (pkt, threadcount); /* threadcount 2 bytes */
3368 pkt = pack_threadid (pkt, nextthread); /* 64 bit thread identifier */
3373 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3376 remote_target::parse_threadlist_response (char *pkt, int result_limit,
3377 threadref *original_echo,
3378 threadref *resultlist,
3381 struct remote_state *rs = get_remote_state ();
3383 int count, resultcount, done;
3386 /* Assume the 'q' and 'M chars have been stripped. */
3387 limit = pkt + (rs->buf_size - BUF_THREAD_ID_SIZE);
3388 /* done parse past here */
3389 pkt = unpack_byte (pkt, &count); /* count field */
3390 pkt = unpack_nibble (pkt, &done);
3391 /* The first threadid is the argument threadid. */
3392 pkt = unpack_threadid (pkt, original_echo); /* should match query packet */
3393 while ((count-- > 0) && (pkt < limit))
3395 pkt = unpack_threadid (pkt, resultlist++);
3396 if (resultcount++ >= result_limit)
3404 /* Fetch the next batch of threads from the remote. Returns -1 if the
3405 qL packet is not supported, 0 on error and 1 on success. */
3408 remote_target::remote_get_threadlist (int startflag, threadref *nextthread,
3409 int result_limit, int *done, int *result_count,
3410 threadref *threadlist)
3412 struct remote_state *rs = get_remote_state ();
3415 /* Trancate result limit to be smaller than the packet size. */
3416 if ((((result_limit + 1) * BUF_THREAD_ID_SIZE) + 10)
3417 >= get_remote_packet_size ())
3418 result_limit = (get_remote_packet_size () / BUF_THREAD_ID_SIZE) - 2;
3420 pack_threadlist_request (rs->buf, startflag, result_limit, nextthread);
3422 getpkt (&rs->buf, &rs->buf_size, 0);
3423 if (*rs->buf == '\0')
3425 /* Packet not supported. */
3430 parse_threadlist_response (rs->buf + 2, result_limit,
3431 &rs->echo_nextthread, threadlist, done);
3433 if (!threadmatch (&rs->echo_nextthread, nextthread))
3435 /* FIXME: This is a good reason to drop the packet. */
3436 /* Possably, there is a duplicate response. */
3438 retransmit immediatly - race conditions
3439 retransmit after timeout - yes
3441 wait for packet, then exit
3443 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3444 return 0; /* I choose simply exiting. */
3446 if (*result_count <= 0)
3450 warning (_("RMT ERROR : failed to get remote thread list."));
3453 return result; /* break; */
3455 if (*result_count > result_limit)
3458 warning (_("RMT ERROR: threadlist response longer than requested."));
3464 /* Fetch the list of remote threads, with the qL packet, and call
3465 STEPFUNCTION for each thread found. Stops iterating and returns 1
3466 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3467 STEPFUNCTION returns false. If the packet is not supported,
3471 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction,
3472 void *context, int looplimit)
3474 struct remote_state *rs = get_remote_state ();
3475 int done, i, result_count;
3483 if (loopcount++ > looplimit)
3486 warning (_("Remote fetch threadlist -infinite loop-."));
3489 result = remote_get_threadlist (startflag, &rs->nextthread,
3490 MAXTHREADLISTRESULTS,
3491 &done, &result_count,
3492 rs->resultthreadlist);
3495 /* Clear for later iterations. */
3497 /* Setup to resume next batch of thread references, set nextthread. */
3498 if (result_count >= 1)
3499 copy_threadref (&rs->nextthread,
3500 &rs->resultthreadlist[result_count - 1]);
3502 while (result_count--)
3504 if (!(*stepfunction) (&rs->resultthreadlist[i++], context))
3514 /* A thread found on the remote target. */
3518 explicit thread_item (ptid_t ptid_)
3522 thread_item (thread_item &&other) = default;
3523 thread_item &operator= (thread_item &&other) = default;
3525 DISABLE_COPY_AND_ASSIGN (thread_item);
3527 /* The thread's PTID. */
3530 /* The thread's extra info. */
3533 /* The thread's name. */
3536 /* The core the thread was running on. -1 if not known. */
3539 /* The thread handle associated with the thread. */
3540 gdb::byte_vector thread_handle;
3543 /* Context passed around to the various methods listing remote
3544 threads. As new threads are found, they're added to the ITEMS
3547 struct threads_listing_context
3549 /* Return true if this object contains an entry for a thread with ptid
3552 bool contains_thread (ptid_t ptid) const
3554 auto match_ptid = [&] (const thread_item &item)
3556 return item.ptid == ptid;
3559 auto it = std::find_if (this->items.begin (),
3563 return it != this->items.end ();
3566 /* Remove the thread with ptid PTID. */
3568 void remove_thread (ptid_t ptid)
3570 auto match_ptid = [&] (const thread_item &item)
3572 return item.ptid == ptid;
3575 auto it = std::remove_if (this->items.begin (),
3579 if (it != this->items.end ())
3580 this->items.erase (it);
3583 /* The threads found on the remote target. */
3584 std::vector<thread_item> items;
3588 remote_newthread_step (threadref *ref, void *data)
3590 struct threads_listing_context *context
3591 = (struct threads_listing_context *) data;
3592 int pid = inferior_ptid.pid ();
3593 int lwp = threadref_to_int (ref);
3594 ptid_t ptid (pid, lwp);
3596 context->items.emplace_back (ptid);
3598 return 1; /* continue iterator */
3601 #define CRAZY_MAX_THREADS 1000
3604 remote_target::remote_current_thread (ptid_t oldpid)
3606 struct remote_state *rs = get_remote_state ();
3609 getpkt (&rs->buf, &rs->buf_size, 0);
3610 if (rs->buf[0] == 'Q' && rs->buf[1] == 'C')
3615 result = read_ptid (&rs->buf[2], &obuf);
3616 if (*obuf != '\0' && remote_debug)
3617 fprintf_unfiltered (gdb_stdlog,
3618 "warning: garbage in qC reply\n");
3626 /* List remote threads using the deprecated qL packet. */
3629 remote_target::remote_get_threads_with_ql (threads_listing_context *context)
3631 if (remote_threadlist_iterator (remote_newthread_step, context,
3632 CRAZY_MAX_THREADS) >= 0)
3638 #if defined(HAVE_LIBEXPAT)
3641 start_thread (struct gdb_xml_parser *parser,
3642 const struct gdb_xml_element *element,
3644 std::vector<gdb_xml_value> &attributes)
3646 struct threads_listing_context *data
3647 = (struct threads_listing_context *) user_data;
3648 struct gdb_xml_value *attr;
3650 char *id = (char *) xml_find_attribute (attributes, "id")->value.get ();
3651 ptid_t ptid = read_ptid (id, NULL);
3653 data->items.emplace_back (ptid);
3654 thread_item &item = data->items.back ();
3656 attr = xml_find_attribute (attributes, "core");
3658 item.core = *(ULONGEST *) attr->value.get ();
3660 attr = xml_find_attribute (attributes, "name");
3662 item.name = (const char *) attr->value.get ();
3664 attr = xml_find_attribute (attributes, "handle");
3666 item.thread_handle = hex2bin ((const char *) attr->value.get ());
3670 end_thread (struct gdb_xml_parser *parser,
3671 const struct gdb_xml_element *element,
3672 void *user_data, const char *body_text)
3674 struct threads_listing_context *data
3675 = (struct threads_listing_context *) user_data;
3677 if (body_text != NULL && *body_text != '\0')
3678 data->items.back ().extra = body_text;
3681 const struct gdb_xml_attribute thread_attributes[] = {
3682 { "id", GDB_XML_AF_NONE, NULL, NULL },
3683 { "core", GDB_XML_AF_OPTIONAL, gdb_xml_parse_attr_ulongest, NULL },
3684 { "name", GDB_XML_AF_OPTIONAL, NULL, NULL },
3685 { "handle", GDB_XML_AF_OPTIONAL, NULL, NULL },
3686 { NULL, GDB_XML_AF_NONE, NULL, NULL }
3689 const struct gdb_xml_element thread_children[] = {
3690 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3693 const struct gdb_xml_element threads_children[] = {
3694 { "thread", thread_attributes, thread_children,
3695 GDB_XML_EF_REPEATABLE | GDB_XML_EF_OPTIONAL,
3696 start_thread, end_thread },
3697 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3700 const struct gdb_xml_element threads_elements[] = {
3701 { "threads", NULL, threads_children,
3702 GDB_XML_EF_NONE, NULL, NULL },
3703 { NULL, NULL, NULL, GDB_XML_EF_NONE, NULL, NULL }
3708 /* List remote threads using qXfer:threads:read. */
3711 remote_target::remote_get_threads_with_qxfer (threads_listing_context *context)
3713 #if defined(HAVE_LIBEXPAT)
3714 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3716 gdb::optional<gdb::char_vector> xml
3717 = target_read_stralloc (this, TARGET_OBJECT_THREADS, NULL);
3719 if (xml && (*xml)[0] != '\0')
3721 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3722 threads_elements, xml->data (), context);
3732 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3735 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context *context)
3737 struct remote_state *rs = get_remote_state ();
3739 if (rs->use_threadinfo_query)
3743 putpkt ("qfThreadInfo");
3744 getpkt (&rs->buf, &rs->buf_size, 0);
3746 if (bufp[0] != '\0') /* q packet recognized */
3748 while (*bufp++ == 'm') /* reply contains one or more TID */
3752 ptid_t ptid = read_ptid (bufp, &bufp);
3753 context->items.emplace_back (ptid);
3755 while (*bufp++ == ','); /* comma-separated list */
3756 putpkt ("qsThreadInfo");
3757 getpkt (&rs->buf, &rs->buf_size, 0);
3764 /* Packet not recognized. */
3765 rs->use_threadinfo_query = 0;
3772 /* Implement the to_update_thread_list function for the remote
3776 remote_target::update_thread_list ()
3778 struct threads_listing_context context;
3781 /* We have a few different mechanisms to fetch the thread list. Try
3782 them all, starting with the most preferred one first, falling
3783 back to older methods. */
3784 if (remote_get_threads_with_qxfer (&context)
3785 || remote_get_threads_with_qthreadinfo (&context)
3786 || remote_get_threads_with_ql (&context))
3790 if (context.items.empty ()
3791 && remote_thread_always_alive (inferior_ptid))
3793 /* Some targets don't really support threads, but still
3794 reply an (empty) thread list in response to the thread
3795 listing packets, instead of replying "packet not
3796 supported". Exit early so we don't delete the main
3801 /* CONTEXT now holds the current thread list on the remote
3802 target end. Delete GDB-side threads no longer found on the
3804 for (thread_info *tp : all_threads_safe ())
3806 if (!context.contains_thread (tp->ptid))
3813 /* Remove any unreported fork child threads from CONTEXT so
3814 that we don't interfere with follow fork, which is where
3815 creation of such threads is handled. */
3816 remove_new_fork_children (&context);
3818 /* And now add threads we don't know about yet to our list. */
3819 for (thread_item &item : context.items)
3821 if (item.ptid != null_ptid)
3823 /* In non-stop mode, we assume new found threads are
3824 executing until proven otherwise with a stop reply.
3825 In all-stop, we can only get here if all threads are
3827 int executing = target_is_non_stop_p () ? 1 : 0;
3829 remote_notice_new_inferior (item.ptid, executing);
3831 thread_info *tp = find_thread_ptid (item.ptid);
3832 remote_thread_info *info = get_remote_thread_info (tp);
3833 info->core = item.core;
3834 info->extra = std::move (item.extra);
3835 info->name = std::move (item.name);
3836 info->thread_handle = std::move (item.thread_handle);
3843 /* If no thread listing method is supported, then query whether
3844 each known thread is alive, one by one, with the T packet.
3845 If the target doesn't support threads at all, then this is a
3846 no-op. See remote_thread_alive. */
3852 * Collect a descriptive string about the given thread.
3853 * The target may say anything it wants to about the thread
3854 * (typically info about its blocked / runnable state, name, etc.).
3855 * This string will appear in the info threads display.
3857 * Optional: targets are not required to implement this function.
3861 remote_target::extra_thread_info (thread_info *tp)
3863 struct remote_state *rs = get_remote_state ();
3866 struct gdb_ext_thread_info threadinfo;
3868 if (rs->remote_desc == 0) /* paranoia */
3869 internal_error (__FILE__, __LINE__,
3870 _("remote_threads_extra_info"));
3872 if (tp->ptid == magic_null_ptid
3873 || (tp->ptid.pid () != 0 && tp->ptid.lwp () == 0))
3874 /* This is the main thread which was added by GDB. The remote
3875 server doesn't know about it. */
3878 std::string &extra = get_remote_thread_info (tp)->extra;
3880 /* If already have cached info, use it. */
3881 if (!extra.empty ())
3882 return extra.c_str ();
3884 if (packet_support (PACKET_qXfer_threads) == PACKET_ENABLE)
3886 /* If we're using qXfer:threads:read, then the extra info is
3887 included in the XML. So if we didn't have anything cached,
3888 it's because there's really no extra info. */
3892 if (rs->use_threadextra_query)
3895 char *endb = rs->buf + get_remote_packet_size ();
3897 xsnprintf (b, endb - b, "qThreadExtraInfo,");
3899 write_ptid (b, endb, tp->ptid);
3902 getpkt (&rs->buf, &rs->buf_size, 0);
3903 if (rs->buf[0] != 0)
3905 extra.resize (strlen (rs->buf) / 2);
3906 hex2bin (rs->buf, (gdb_byte *) &extra[0], extra.size ());
3907 return extra.c_str ();
3911 /* If the above query fails, fall back to the old method. */
3912 rs->use_threadextra_query = 0;
3913 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
3914 | TAG_MOREDISPLAY | TAG_DISPLAY;
3915 int_to_threadref (&id, tp->ptid.lwp ());
3916 if (remote_get_threadinfo (&id, set, &threadinfo))
3917 if (threadinfo.active)
3919 if (*threadinfo.shortname)
3920 string_appendf (extra, " Name: %s", threadinfo.shortname);
3921 if (*threadinfo.display)
3923 if (!extra.empty ())
3925 string_appendf (extra, " State: %s", threadinfo.display);
3927 if (*threadinfo.more_display)
3929 if (!extra.empty ())
3931 string_appendf (extra, " Priority: %s", threadinfo.more_display);
3933 return extra.c_str ();
3940 remote_target::static_tracepoint_marker_at (CORE_ADDR addr,
3941 struct static_tracepoint_marker *marker)
3943 struct remote_state *rs = get_remote_state ();
3946 xsnprintf (p, get_remote_packet_size (), "qTSTMat:");
3948 p += hexnumstr (p, addr);
3950 getpkt (&rs->buf, &rs->buf_size, 0);
3954 error (_("Remote failure reply: %s"), p);
3958 parse_static_tracepoint_marker_definition (p, NULL, marker);
3965 std::vector<static_tracepoint_marker>
3966 remote_target::static_tracepoint_markers_by_strid (const char *strid)
3968 struct remote_state *rs = get_remote_state ();
3969 std::vector<static_tracepoint_marker> markers;
3971 static_tracepoint_marker marker;
3973 /* Ask for a first packet of static tracepoint marker
3976 getpkt (&rs->buf, &rs->buf_size, 0);
3979 error (_("Remote failure reply: %s"), p);
3985 parse_static_tracepoint_marker_definition (p, &p, &marker);
3987 if (strid == NULL || marker.str_id == strid)
3988 markers.push_back (std::move (marker));
3990 while (*p++ == ','); /* comma-separated list */
3991 /* Ask for another packet of static tracepoint definition. */
3993 getpkt (&rs->buf, &rs->buf_size, 0);
4001 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4004 remote_target::get_ada_task_ptid (long lwp, long thread)
4006 return ptid_t (inferior_ptid.pid (), lwp, 0);
4010 /* Restart the remote side; this is an extended protocol operation. */
4013 remote_target::extended_remote_restart ()
4015 struct remote_state *rs = get_remote_state ();
4017 /* Send the restart command; for reasons I don't understand the
4018 remote side really expects a number after the "R". */
4019 xsnprintf (rs->buf, get_remote_packet_size (), "R%x", 0);
4022 remote_fileio_reset ();
4025 /* Clean up connection to a remote debugger. */
4028 remote_target::close ()
4030 /* Make sure we leave stdin registered in the event loop. */
4033 /* We don't have a connection to the remote stub anymore. Get rid
4034 of all the inferiors and their threads we were controlling.
4035 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
4036 will be unable to find the thread corresponding to (pid, 0, 0). */
4037 inferior_ptid = null_ptid;
4038 discard_all_inferiors ();
4040 trace_reset_local_state ();
4045 remote_target::~remote_target ()
4047 struct remote_state *rs = get_remote_state ();
4049 /* Check for NULL because we may get here with a partially
4050 constructed target/connection. */
4051 if (rs->remote_desc == nullptr)
4054 serial_close (rs->remote_desc);
4056 /* We are destroying the remote target, so we should discard
4057 everything of this target. */
4058 discard_pending_stop_replies_in_queue ();
4060 if (rs->remote_async_inferior_event_token)
4061 delete_async_event_handler (&rs->remote_async_inferior_event_token);
4063 remote_notif_state_xfree (rs->notif_state);
4066 /* Query the remote side for the text, data and bss offsets. */
4069 remote_target::get_offsets ()
4071 struct remote_state *rs = get_remote_state ();
4074 int lose, num_segments = 0, do_sections, do_segments;
4075 CORE_ADDR text_addr, data_addr, bss_addr, segments[2];
4076 struct section_offsets *offs;
4077 struct symfile_segment_data *data;
4079 if (symfile_objfile == NULL)
4082 putpkt ("qOffsets");
4083 getpkt (&rs->buf, &rs->buf_size, 0);
4086 if (buf[0] == '\000')
4087 return; /* Return silently. Stub doesn't support
4091 warning (_("Remote failure reply: %s"), buf);
4095 /* Pick up each field in turn. This used to be done with scanf, but
4096 scanf will make trouble if CORE_ADDR size doesn't match
4097 conversion directives correctly. The following code will work
4098 with any size of CORE_ADDR. */
4099 text_addr = data_addr = bss_addr = 0;
4103 if (startswith (ptr, "Text="))
4106 /* Don't use strtol, could lose on big values. */
4107 while (*ptr && *ptr != ';')
4108 text_addr = (text_addr << 4) + fromhex (*ptr++);
4110 if (startswith (ptr, ";Data="))
4113 while (*ptr && *ptr != ';')
4114 data_addr = (data_addr << 4) + fromhex (*ptr++);
4119 if (!lose && startswith (ptr, ";Bss="))
4122 while (*ptr && *ptr != ';')
4123 bss_addr = (bss_addr << 4) + fromhex (*ptr++);
4125 if (bss_addr != data_addr)
4126 warning (_("Target reported unsupported offsets: %s"), buf);
4131 else if (startswith (ptr, "TextSeg="))
4134 /* Don't use strtol, could lose on big values. */
4135 while (*ptr && *ptr != ';')
4136 text_addr = (text_addr << 4) + fromhex (*ptr++);
4139 if (startswith (ptr, ";DataSeg="))
4142 while (*ptr && *ptr != ';')
4143 data_addr = (data_addr << 4) + fromhex (*ptr++);
4151 error (_("Malformed response to offset query, %s"), buf);
4152 else if (*ptr != '\0')
4153 warning (_("Target reported unsupported offsets: %s"), buf);
4155 offs = ((struct section_offsets *)
4156 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections)));
4157 memcpy (offs, symfile_objfile->section_offsets,
4158 SIZEOF_N_SECTION_OFFSETS (symfile_objfile->num_sections));
4160 data = get_symfile_segment_data (symfile_objfile->obfd);
4161 do_segments = (data != NULL);
4162 do_sections = num_segments == 0;
4164 if (num_segments > 0)
4166 segments[0] = text_addr;
4167 segments[1] = data_addr;
4169 /* If we have two segments, we can still try to relocate everything
4170 by assuming that the .text and .data offsets apply to the whole
4171 text and data segments. Convert the offsets given in the packet
4172 to base addresses for symfile_map_offsets_to_segments. */
4173 else if (data && data->num_segments == 2)
4175 segments[0] = data->segment_bases[0] + text_addr;
4176 segments[1] = data->segment_bases[1] + data_addr;
4179 /* If the object file has only one segment, assume that it is text
4180 rather than data; main programs with no writable data are rare,
4181 but programs with no code are useless. Of course the code might
4182 have ended up in the data segment... to detect that we would need
4183 the permissions here. */
4184 else if (data && data->num_segments == 1)
4186 segments[0] = data->segment_bases[0] + text_addr;
4189 /* There's no way to relocate by segment. */
4195 int ret = symfile_map_offsets_to_segments (symfile_objfile->obfd, data,
4196 offs, num_segments, segments);
4198 if (ret == 0 && !do_sections)
4199 error (_("Can not handle qOffsets TextSeg "
4200 "response with this symbol file"));
4207 free_symfile_segment_data (data);
4211 offs->offsets[SECT_OFF_TEXT (symfile_objfile)] = text_addr;
4213 /* This is a temporary kludge to force data and bss to use the
4214 same offsets because that's what nlmconv does now. The real
4215 solution requires changes to the stub and remote.c that I
4216 don't have time to do right now. */
4218 offs->offsets[SECT_OFF_DATA (symfile_objfile)] = data_addr;
4219 offs->offsets[SECT_OFF_BSS (symfile_objfile)] = data_addr;
4222 objfile_relocate (symfile_objfile, offs);
4225 /* Send interrupt_sequence to remote target. */
4228 remote_target::send_interrupt_sequence ()
4230 struct remote_state *rs = get_remote_state ();
4232 if (interrupt_sequence_mode == interrupt_sequence_control_c)
4233 remote_serial_write ("\x03", 1);
4234 else if (interrupt_sequence_mode == interrupt_sequence_break)
4235 serial_send_break (rs->remote_desc);
4236 else if (interrupt_sequence_mode == interrupt_sequence_break_g)
4238 serial_send_break (rs->remote_desc);
4239 remote_serial_write ("g", 1);
4242 internal_error (__FILE__, __LINE__,
4243 _("Invalid value for interrupt_sequence_mode: %s."),
4244 interrupt_sequence_mode);
4248 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4249 and extract the PTID. Returns NULL_PTID if not found. */
4252 stop_reply_extract_thread (char *stop_reply)
4254 if (stop_reply[0] == 'T' && strlen (stop_reply) > 3)
4258 /* Txx r:val ; r:val (...) */
4261 /* Look for "register" named "thread". */
4266 p1 = strchr (p, ':');
4270 if (strncmp (p, "thread", p1 - p) == 0)
4271 return read_ptid (++p1, &p);
4273 p1 = strchr (p, ';');
4285 /* Determine the remote side's current thread. If we have a stop
4286 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4287 "thread" register we can extract the current thread from. If not,
4288 ask the remote which is the current thread with qC. The former
4289 method avoids a roundtrip. */
4292 remote_target::get_current_thread (char *wait_status)
4294 ptid_t ptid = null_ptid;
4296 /* Note we don't use remote_parse_stop_reply as that makes use of
4297 the target architecture, which we haven't yet fully determined at
4299 if (wait_status != NULL)
4300 ptid = stop_reply_extract_thread (wait_status);
4301 if (ptid == null_ptid)
4302 ptid = remote_current_thread (inferior_ptid);
4307 /* Query the remote target for which is the current thread/process,
4308 add it to our tables, and update INFERIOR_PTID. The caller is
4309 responsible for setting the state such that the remote end is ready
4310 to return the current thread.
4312 This function is called after handling the '?' or 'vRun' packets,
4313 whose response is a stop reply from which we can also try
4314 extracting the thread. If the target doesn't support the explicit
4315 qC query, we infer the current thread from that stop reply, passed
4316 in in WAIT_STATUS, which may be NULL. */
4319 remote_target::add_current_inferior_and_thread (char *wait_status)
4321 struct remote_state *rs = get_remote_state ();
4324 inferior_ptid = null_ptid;
4326 /* Now, if we have thread information, update inferior_ptid. */
4327 ptid_t curr_ptid = get_current_thread (wait_status);
4329 if (curr_ptid != null_ptid)
4331 if (!remote_multi_process_p (rs))
4336 /* Without this, some commands which require an active target
4337 (such as kill) won't work. This variable serves (at least)
4338 double duty as both the pid of the target process (if it has
4339 such), and as a flag indicating that a target is active. */
4340 curr_ptid = magic_null_ptid;
4344 remote_add_inferior (fake_pid_p, curr_ptid.pid (), -1, 1);
4346 /* Add the main thread and switch to it. Don't try reading
4347 registers yet, since we haven't fetched the target description
4349 thread_info *tp = add_thread_silent (curr_ptid);
4350 switch_to_thread_no_regs (tp);
4353 /* Print info about a thread that was found already stopped on
4357 print_one_stopped_thread (struct thread_info *thread)
4359 struct target_waitstatus *ws = &thread->suspend.waitstatus;
4361 switch_to_thread (thread);
4362 thread->suspend.stop_pc = get_frame_pc (get_current_frame ());
4363 set_current_sal_from_frame (get_current_frame ());
4365 thread->suspend.waitstatus_pending_p = 0;
4367 if (ws->kind == TARGET_WAITKIND_STOPPED)
4369 enum gdb_signal sig = ws->value.sig;
4371 if (signal_print_state (sig))
4372 gdb::observers::signal_received.notify (sig);
4374 gdb::observers::normal_stop.notify (NULL, 1);
4377 /* Process all initial stop replies the remote side sent in response
4378 to the ? packet. These indicate threads that were already stopped
4379 on initial connection. We mark these threads as stopped and print
4380 their current frame before giving the user the prompt. */
4383 remote_target::process_initial_stop_replies (int from_tty)
4385 int pending_stop_replies = stop_reply_queue_length ();
4386 struct thread_info *selected = NULL;
4387 struct thread_info *lowest_stopped = NULL;
4388 struct thread_info *first = NULL;
4390 /* Consume the initial pending events. */
4391 while (pending_stop_replies-- > 0)
4393 ptid_t waiton_ptid = minus_one_ptid;
4395 struct target_waitstatus ws;
4396 int ignore_event = 0;
4398 memset (&ws, 0, sizeof (ws));
4399 event_ptid = target_wait (waiton_ptid, &ws, TARGET_WNOHANG);
4401 print_target_wait_results (waiton_ptid, event_ptid, &ws);
4405 case TARGET_WAITKIND_IGNORE:
4406 case TARGET_WAITKIND_NO_RESUMED:
4407 case TARGET_WAITKIND_SIGNALLED:
4408 case TARGET_WAITKIND_EXITED:
4409 /* We shouldn't see these, but if we do, just ignore. */
4411 fprintf_unfiltered (gdb_stdlog, "remote: event ignored\n");
4415 case TARGET_WAITKIND_EXECD:
4416 xfree (ws.value.execd_pathname);
4425 struct thread_info *evthread = find_thread_ptid (event_ptid);
4427 if (ws.kind == TARGET_WAITKIND_STOPPED)
4429 enum gdb_signal sig = ws.value.sig;
4431 /* Stubs traditionally report SIGTRAP as initial signal,
4432 instead of signal 0. Suppress it. */
4433 if (sig == GDB_SIGNAL_TRAP)
4435 evthread->suspend.stop_signal = sig;
4439 evthread->suspend.waitstatus = ws;
4441 if (ws.kind != TARGET_WAITKIND_STOPPED
4442 || ws.value.sig != GDB_SIGNAL_0)
4443 evthread->suspend.waitstatus_pending_p = 1;
4445 set_executing (event_ptid, 0);
4446 set_running (event_ptid, 0);
4447 get_remote_thread_info (evthread)->vcont_resumed = 0;
4450 /* "Notice" the new inferiors before anything related to
4451 registers/memory. */
4452 for (inferior *inf : all_non_exited_inferiors ())
4454 inf->needs_setup = 1;
4458 thread_info *thread = any_live_thread_of_inferior (inf);
4459 notice_new_inferior (thread, thread->state == THREAD_RUNNING,
4464 /* If all-stop on top of non-stop, pause all threads. Note this
4465 records the threads' stop pc, so must be done after "noticing"
4469 stop_all_threads ();
4471 /* If all threads of an inferior were already stopped, we
4472 haven't setup the inferior yet. */
4473 for (inferior *inf : all_non_exited_inferiors ())
4475 if (inf->needs_setup)
4477 thread_info *thread = any_live_thread_of_inferior (inf);
4478 switch_to_thread_no_regs (thread);
4484 /* Now go over all threads that are stopped, and print their current
4485 frame. If all-stop, then if there's a signalled thread, pick
4487 for (thread_info *thread : all_non_exited_threads ())
4493 thread->set_running (false);
4494 else if (thread->state != THREAD_STOPPED)
4497 if (selected == NULL
4498 && thread->suspend.waitstatus_pending_p)
4501 if (lowest_stopped == NULL
4502 || thread->inf->num < lowest_stopped->inf->num
4503 || thread->per_inf_num < lowest_stopped->per_inf_num)
4504 lowest_stopped = thread;
4507 print_one_stopped_thread (thread);
4510 /* In all-stop, we only print the status of one thread, and leave
4511 others with their status pending. */
4514 thread_info *thread = selected;
4516 thread = lowest_stopped;
4520 print_one_stopped_thread (thread);
4523 /* For "info program". */
4524 thread_info *thread = inferior_thread ();
4525 if (thread->state == THREAD_STOPPED)
4526 set_last_target_status (inferior_ptid, thread->suspend.waitstatus);
4529 /* Start the remote connection and sync state. */
4532 remote_target::start_remote (int from_tty, int extended_p)
4534 struct remote_state *rs = get_remote_state ();
4535 struct packet_config *noack_config;
4536 char *wait_status = NULL;
4538 /* Signal other parts that we're going through the initial setup,
4539 and so things may not be stable yet. E.g., we don't try to
4540 install tracepoints until we've relocated symbols. Also, a
4541 Ctrl-C before we're connected and synced up can't interrupt the
4542 target. Instead, it offers to drop the (potentially wedged)
4544 rs->starting_up = 1;
4548 if (interrupt_on_connect)
4549 send_interrupt_sequence ();
4551 /* Ack any packet which the remote side has already sent. */
4552 remote_serial_write ("+", 1);
4554 /* The first packet we send to the target is the optional "supported
4555 packets" request. If the target can answer this, it will tell us
4556 which later probes to skip. */
4557 remote_query_supported ();
4559 /* If the stub wants to get a QAllow, compose one and send it. */
4560 if (packet_support (PACKET_QAllow) != PACKET_DISABLE)
4563 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4564 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4565 as a reply to known packet. For packet "vFile:setfs:" it is an
4566 invalid reply and GDB would return error in
4567 remote_hostio_set_filesystem, making remote files access impossible.
4568 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4569 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4571 const char v_mustreplyempty[] = "vMustReplyEmpty";
4573 putpkt (v_mustreplyempty);
4574 getpkt (&rs->buf, &rs->buf_size, 0);
4575 if (strcmp (rs->buf, "OK") == 0)
4576 remote_protocol_packets[PACKET_vFile_setfs].support = PACKET_DISABLE;
4577 else if (strcmp (rs->buf, "") != 0)
4578 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty,
4582 /* Next, we possibly activate noack mode.
4584 If the QStartNoAckMode packet configuration is set to AUTO,
4585 enable noack mode if the stub reported a wish for it with
4588 If set to TRUE, then enable noack mode even if the stub didn't
4589 report it in qSupported. If the stub doesn't reply OK, the
4590 session ends with an error.
4592 If FALSE, then don't activate noack mode, regardless of what the
4593 stub claimed should be the default with qSupported. */
4595 noack_config = &remote_protocol_packets[PACKET_QStartNoAckMode];
4596 if (packet_config_support (noack_config) != PACKET_DISABLE)
4598 putpkt ("QStartNoAckMode");
4599 getpkt (&rs->buf, &rs->buf_size, 0);
4600 if (packet_ok (rs->buf, noack_config) == PACKET_OK)
4606 /* Tell the remote that we are using the extended protocol. */
4608 getpkt (&rs->buf, &rs->buf_size, 0);
4611 /* Let the target know which signals it is allowed to pass down to
4613 update_signals_program_target ();
4615 /* Next, if the target can specify a description, read it. We do
4616 this before anything involving memory or registers. */
4617 target_find_description ();
4619 /* Next, now that we know something about the target, update the
4620 address spaces in the program spaces. */
4621 update_address_spaces ();
4623 /* On OSs where the list of libraries is global to all
4624 processes, we fetch them early. */
4625 if (gdbarch_has_global_solist (target_gdbarch ()))
4626 solib_add (NULL, from_tty, auto_solib_add);
4628 if (target_is_non_stop_p ())
4630 if (packet_support (PACKET_QNonStop) != PACKET_ENABLE)
4631 error (_("Non-stop mode requested, but remote "
4632 "does not support non-stop"));
4634 putpkt ("QNonStop:1");
4635 getpkt (&rs->buf, &rs->buf_size, 0);
4637 if (strcmp (rs->buf, "OK") != 0)
4638 error (_("Remote refused setting non-stop mode with: %s"), rs->buf);
4640 /* Find about threads and processes the stub is already
4641 controlling. We default to adding them in the running state.
4642 The '?' query below will then tell us about which threads are
4644 this->update_thread_list ();
4646 else if (packet_support (PACKET_QNonStop) == PACKET_ENABLE)
4648 /* Don't assume that the stub can operate in all-stop mode.
4649 Request it explicitly. */
4650 putpkt ("QNonStop:0");
4651 getpkt (&rs->buf, &rs->buf_size, 0);
4653 if (strcmp (rs->buf, "OK") != 0)
4654 error (_("Remote refused setting all-stop mode with: %s"), rs->buf);
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, &rs->buf_size, 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) + 1);
4688 strcpy (wait_status, rs->buf);
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, 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, "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);
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. */
4799 pass_signals (0, NULL);
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 ()
4894 char *msg, *reply, *tmp;
4897 struct cleanup *old_chain;
4899 /* The remote side has no concept of inferiors that aren't running
4900 yet, it only knows about running processes. If we're connected
4901 but our current inferior is not running, we should not invite the
4902 remote target to request symbol lookups related to its
4903 (unrelated) current process. */
4904 if (!target_has_execution)
4907 if (packet_support (PACKET_qSymbol) == PACKET_DISABLE)
4910 /* Make sure the remote is pointing at the right process. Note
4911 there's no way to select "no process". */
4912 set_general_process ();
4914 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4915 because we need both at the same time. */
4916 msg = (char *) xmalloc (get_remote_packet_size ());
4917 old_chain = make_cleanup (xfree, msg);
4918 reply = (char *) xmalloc (get_remote_packet_size ());
4919 make_cleanup (free_current_contents, &reply);
4920 reply_size = get_remote_packet_size ();
4922 /* Invite target to request symbol lookups. */
4924 putpkt ("qSymbol::");
4925 getpkt (&reply, &reply_size, 0);
4926 packet_ok (reply, &remote_protocol_packets[PACKET_qSymbol]);
4928 while (startswith (reply, "qSymbol:"))
4930 struct bound_minimal_symbol sym;
4933 end = hex2bin (tmp, (gdb_byte *) msg, strlen (tmp) / 2);
4935 sym = lookup_minimal_symbol (msg, NULL, NULL);
4936 if (sym.minsym == NULL)
4937 xsnprintf (msg, get_remote_packet_size (), "qSymbol::%s", &reply[8]);
4940 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
4941 CORE_ADDR sym_addr = BMSYMBOL_VALUE_ADDRESS (sym);
4943 /* If this is a function address, return the start of code
4944 instead of any data function descriptor. */
4945 sym_addr = gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4947 current_top_target ());
4949 xsnprintf (msg, get_remote_packet_size (), "qSymbol:%s:%s",
4950 phex_nz (sym_addr, addr_size), &reply[8]);
4954 getpkt (&reply, &reply_size, 0);
4957 do_cleanups (old_chain);
4960 static struct serial *
4961 remote_serial_open (const char *name)
4963 static int udp_warning = 0;
4965 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4966 of in ser-tcp.c, because it is the remote protocol assuming that the
4967 serial connection is reliable and not the serial connection promising
4969 if (!udp_warning && startswith (name, "udp:"))
4971 warning (_("The remote protocol may be unreliable over UDP.\n"
4972 "Some events may be lost, rendering further debugging "
4977 return serial_open (name);
4980 /* Inform the target of our permission settings. The permission flags
4981 work without this, but if the target knows the settings, it can do
4982 a couple things. First, it can add its own check, to catch cases
4983 that somehow manage to get by the permissions checks in target
4984 methods. Second, if the target is wired to disallow particular
4985 settings (for instance, a system in the field that is not set up to
4986 be able to stop at a breakpoint), it can object to any unavailable
4990 remote_target::set_permissions ()
4992 struct remote_state *rs = get_remote_state ();
4994 xsnprintf (rs->buf, get_remote_packet_size (), "QAllow:"
4995 "WriteReg:%x;WriteMem:%x;"
4996 "InsertBreak:%x;InsertTrace:%x;"
4997 "InsertFastTrace:%x;Stop:%x",
4998 may_write_registers, may_write_memory,
4999 may_insert_breakpoints, may_insert_tracepoints,
5000 may_insert_fast_tracepoints, may_stop);
5002 getpkt (&rs->buf, &rs->buf_size, 0);
5004 /* If the target didn't like the packet, warn the user. Do not try
5005 to undo the user's settings, that would just be maddening. */
5006 if (strcmp (rs->buf, "OK") != 0)
5007 warning (_("Remote refused setting permissions with: %s"), rs->buf);
5010 /* This type describes each known response to the qSupported
5012 struct protocol_feature
5014 /* The name of this protocol feature. */
5017 /* The default for this protocol feature. */
5018 enum packet_support default_support;
5020 /* The function to call when this feature is reported, or after
5021 qSupported processing if the feature is not supported.
5022 The first argument points to this structure. The second
5023 argument indicates whether the packet requested support be
5024 enabled, disabled, or probed (or the default, if this function
5025 is being called at the end of processing and this feature was
5026 not reported). The third argument may be NULL; if not NULL, it
5027 is a NUL-terminated string taken from the packet following
5028 this feature's name and an equals sign. */
5029 void (*func) (remote_target *remote, const struct protocol_feature *,
5030 enum packet_support, const char *);
5032 /* The corresponding packet for this feature. Only used if
5033 FUNC is remote_supported_packet. */
5038 remote_supported_packet (remote_target *remote,
5039 const struct protocol_feature *feature,
5040 enum packet_support support,
5041 const char *argument)
5045 warning (_("Remote qSupported response supplied an unexpected value for"
5046 " \"%s\"."), feature->name);
5050 remote_protocol_packets[feature->packet].support = support;
5054 remote_target::remote_packet_size (const protocol_feature *feature,
5055 enum packet_support support, const char *value)
5057 struct remote_state *rs = get_remote_state ();
5062 if (support != PACKET_ENABLE)
5065 if (value == NULL || *value == '\0')
5067 warning (_("Remote target reported \"%s\" without a size."),
5073 packet_size = strtol (value, &value_end, 16);
5074 if (errno != 0 || *value_end != '\0' || packet_size < 0)
5076 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5077 feature->name, value);
5081 /* Record the new maximum packet size. */
5082 rs->explicit_packet_size = packet_size;
5086 remote_packet_size (remote_target *remote, const protocol_feature *feature,
5087 enum packet_support support, const char *value)
5089 remote->remote_packet_size (feature, support, value);
5092 static const struct protocol_feature remote_protocol_features[] = {
5093 { "PacketSize", PACKET_DISABLE, remote_packet_size, -1 },
5094 { "qXfer:auxv:read", PACKET_DISABLE, remote_supported_packet,
5095 PACKET_qXfer_auxv },
5096 { "qXfer:exec-file:read", PACKET_DISABLE, remote_supported_packet,
5097 PACKET_qXfer_exec_file },
5098 { "qXfer:features:read", PACKET_DISABLE, remote_supported_packet,
5099 PACKET_qXfer_features },
5100 { "qXfer:libraries:read", PACKET_DISABLE, remote_supported_packet,
5101 PACKET_qXfer_libraries },
5102 { "qXfer:libraries-svr4:read", PACKET_DISABLE, remote_supported_packet,
5103 PACKET_qXfer_libraries_svr4 },
5104 { "augmented-libraries-svr4-read", PACKET_DISABLE,
5105 remote_supported_packet, PACKET_augmented_libraries_svr4_read_feature },
5106 { "qXfer:memory-map:read", PACKET_DISABLE, remote_supported_packet,
5107 PACKET_qXfer_memory_map },
5108 { "qXfer:spu:read", PACKET_DISABLE, remote_supported_packet,
5109 PACKET_qXfer_spu_read },
5110 { "qXfer:spu:write", PACKET_DISABLE, remote_supported_packet,
5111 PACKET_qXfer_spu_write },
5112 { "qXfer:osdata:read", PACKET_DISABLE, remote_supported_packet,
5113 PACKET_qXfer_osdata },
5114 { "qXfer:threads:read", PACKET_DISABLE, remote_supported_packet,
5115 PACKET_qXfer_threads },
5116 { "qXfer:traceframe-info:read", PACKET_DISABLE, remote_supported_packet,
5117 PACKET_qXfer_traceframe_info },
5118 { "QPassSignals", PACKET_DISABLE, remote_supported_packet,
5119 PACKET_QPassSignals },
5120 { "QCatchSyscalls", PACKET_DISABLE, remote_supported_packet,
5121 PACKET_QCatchSyscalls },
5122 { "QProgramSignals", PACKET_DISABLE, remote_supported_packet,
5123 PACKET_QProgramSignals },
5124 { "QSetWorkingDir", PACKET_DISABLE, remote_supported_packet,
5125 PACKET_QSetWorkingDir },
5126 { "QStartupWithShell", PACKET_DISABLE, remote_supported_packet,
5127 PACKET_QStartupWithShell },
5128 { "QEnvironmentHexEncoded", PACKET_DISABLE, remote_supported_packet,
5129 PACKET_QEnvironmentHexEncoded },
5130 { "QEnvironmentReset", PACKET_DISABLE, remote_supported_packet,
5131 PACKET_QEnvironmentReset },
5132 { "QEnvironmentUnset", PACKET_DISABLE, remote_supported_packet,
5133 PACKET_QEnvironmentUnset },
5134 { "QStartNoAckMode", PACKET_DISABLE, remote_supported_packet,
5135 PACKET_QStartNoAckMode },
5136 { "multiprocess", PACKET_DISABLE, remote_supported_packet,
5137 PACKET_multiprocess_feature },
5138 { "QNonStop", PACKET_DISABLE, remote_supported_packet, PACKET_QNonStop },
5139 { "qXfer:siginfo:read", PACKET_DISABLE, remote_supported_packet,
5140 PACKET_qXfer_siginfo_read },
5141 { "qXfer:siginfo:write", PACKET_DISABLE, remote_supported_packet,
5142 PACKET_qXfer_siginfo_write },
5143 { "ConditionalTracepoints", PACKET_DISABLE, remote_supported_packet,
5144 PACKET_ConditionalTracepoints },
5145 { "ConditionalBreakpoints", PACKET_DISABLE, remote_supported_packet,
5146 PACKET_ConditionalBreakpoints },
5147 { "BreakpointCommands", PACKET_DISABLE, remote_supported_packet,
5148 PACKET_BreakpointCommands },
5149 { "FastTracepoints", PACKET_DISABLE, remote_supported_packet,
5150 PACKET_FastTracepoints },
5151 { "StaticTracepoints", PACKET_DISABLE, remote_supported_packet,
5152 PACKET_StaticTracepoints },
5153 {"InstallInTrace", PACKET_DISABLE, remote_supported_packet,
5154 PACKET_InstallInTrace},
5155 { "DisconnectedTracing", PACKET_DISABLE, remote_supported_packet,
5156 PACKET_DisconnectedTracing_feature },
5157 { "ReverseContinue", PACKET_DISABLE, remote_supported_packet,
5159 { "ReverseStep", PACKET_DISABLE, remote_supported_packet,
5161 { "TracepointSource", PACKET_DISABLE, remote_supported_packet,
5162 PACKET_TracepointSource },
5163 { "QAllow", PACKET_DISABLE, remote_supported_packet,
5165 { "EnableDisableTracepoints", PACKET_DISABLE, remote_supported_packet,
5166 PACKET_EnableDisableTracepoints_feature },
5167 { "qXfer:fdpic:read", PACKET_DISABLE, remote_supported_packet,
5168 PACKET_qXfer_fdpic },
5169 { "qXfer:uib:read", PACKET_DISABLE, remote_supported_packet,
5171 { "QDisableRandomization", PACKET_DISABLE, remote_supported_packet,
5172 PACKET_QDisableRandomization },
5173 { "QAgent", PACKET_DISABLE, remote_supported_packet, PACKET_QAgent},
5174 { "QTBuffer:size", PACKET_DISABLE,
5175 remote_supported_packet, PACKET_QTBuffer_size},
5176 { "tracenz", PACKET_DISABLE, remote_supported_packet, PACKET_tracenz_feature },
5177 { "Qbtrace:off", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_off },
5178 { "Qbtrace:bts", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_bts },
5179 { "Qbtrace:pt", PACKET_DISABLE, remote_supported_packet, PACKET_Qbtrace_pt },
5180 { "qXfer:btrace:read", PACKET_DISABLE, remote_supported_packet,
5181 PACKET_qXfer_btrace },
5182 { "qXfer:btrace-conf:read", PACKET_DISABLE, remote_supported_packet,
5183 PACKET_qXfer_btrace_conf },
5184 { "Qbtrace-conf:bts:size", PACKET_DISABLE, remote_supported_packet,
5185 PACKET_Qbtrace_conf_bts_size },
5186 { "swbreak", PACKET_DISABLE, remote_supported_packet, PACKET_swbreak_feature },
5187 { "hwbreak", PACKET_DISABLE, remote_supported_packet, PACKET_hwbreak_feature },
5188 { "fork-events", PACKET_DISABLE, remote_supported_packet,
5189 PACKET_fork_event_feature },
5190 { "vfork-events", PACKET_DISABLE, remote_supported_packet,
5191 PACKET_vfork_event_feature },
5192 { "exec-events", PACKET_DISABLE, remote_supported_packet,
5193 PACKET_exec_event_feature },
5194 { "Qbtrace-conf:pt:size", PACKET_DISABLE, remote_supported_packet,
5195 PACKET_Qbtrace_conf_pt_size },
5196 { "vContSupported", PACKET_DISABLE, remote_supported_packet, PACKET_vContSupported },
5197 { "QThreadEvents", PACKET_DISABLE, remote_supported_packet, PACKET_QThreadEvents },
5198 { "no-resumed", PACKET_DISABLE, remote_supported_packet, PACKET_no_resumed },
5201 static char *remote_support_xml;
5203 /* Register string appended to "xmlRegisters=" in qSupported query. */
5206 register_remote_support_xml (const char *xml)
5208 #if defined(HAVE_LIBEXPAT)
5209 if (remote_support_xml == NULL)
5210 remote_support_xml = concat ("xmlRegisters=", xml, (char *) NULL);
5213 char *copy = xstrdup (remote_support_xml + 13);
5214 char *p = strtok (copy, ",");
5218 if (strcmp (p, xml) == 0)
5225 while ((p = strtok (NULL, ",")) != NULL);
5228 remote_support_xml = reconcat (remote_support_xml,
5229 remote_support_xml, ",", xml,
5236 remote_query_supported_append (std::string *msg, const char *append)
5240 msg->append (append);
5244 remote_target::remote_query_supported ()
5246 struct remote_state *rs = get_remote_state ();
5249 unsigned char seen [ARRAY_SIZE (remote_protocol_features)];
5251 /* The packet support flags are handled differently for this packet
5252 than for most others. We treat an error, a disabled packet, and
5253 an empty response identically: any features which must be reported
5254 to be used will be automatically disabled. An empty buffer
5255 accomplishes this, since that is also the representation for a list
5256 containing no features. */
5259 if (packet_support (PACKET_qSupported) != PACKET_DISABLE)
5263 if (packet_set_cmd_state (PACKET_multiprocess_feature) != AUTO_BOOLEAN_FALSE)
5264 remote_query_supported_append (&q, "multiprocess+");
5266 if (packet_set_cmd_state (PACKET_swbreak_feature) != AUTO_BOOLEAN_FALSE)
5267 remote_query_supported_append (&q, "swbreak+");
5268 if (packet_set_cmd_state (PACKET_hwbreak_feature) != AUTO_BOOLEAN_FALSE)
5269 remote_query_supported_append (&q, "hwbreak+");
5271 remote_query_supported_append (&q, "qRelocInsn+");
5273 if (packet_set_cmd_state (PACKET_fork_event_feature)
5274 != AUTO_BOOLEAN_FALSE)
5275 remote_query_supported_append (&q, "fork-events+");
5276 if (packet_set_cmd_state (PACKET_vfork_event_feature)
5277 != AUTO_BOOLEAN_FALSE)
5278 remote_query_supported_append (&q, "vfork-events+");
5279 if (packet_set_cmd_state (PACKET_exec_event_feature)
5280 != AUTO_BOOLEAN_FALSE)
5281 remote_query_supported_append (&q, "exec-events+");
5283 if (packet_set_cmd_state (PACKET_vContSupported) != AUTO_BOOLEAN_FALSE)
5284 remote_query_supported_append (&q, "vContSupported+");
5286 if (packet_set_cmd_state (PACKET_QThreadEvents) != AUTO_BOOLEAN_FALSE)
5287 remote_query_supported_append (&q, "QThreadEvents+");
5289 if (packet_set_cmd_state (PACKET_no_resumed) != AUTO_BOOLEAN_FALSE)
5290 remote_query_supported_append (&q, "no-resumed+");
5292 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5293 the qSupported:xmlRegisters=i386 handling. */
5294 if (remote_support_xml != NULL
5295 && packet_support (PACKET_qXfer_features) != PACKET_DISABLE)
5296 remote_query_supported_append (&q, remote_support_xml);
5298 q = "qSupported:" + q;
5299 putpkt (q.c_str ());
5301 getpkt (&rs->buf, &rs->buf_size, 0);
5303 /* If an error occured, warn, but do not return - just reset the
5304 buffer to empty and go on to disable features. */
5305 if (packet_ok (rs->buf, &remote_protocol_packets[PACKET_qSupported])
5308 warning (_("Remote failure reply: %s"), rs->buf);
5313 memset (seen, 0, sizeof (seen));
5318 enum packet_support is_supported;
5319 char *p, *end, *name_end, *value;
5321 /* First separate out this item from the rest of the packet. If
5322 there's another item after this, we overwrite the separator
5323 (terminated strings are much easier to work with). */
5325 end = strchr (p, ';');
5328 end = p + strlen (p);
5338 warning (_("empty item in \"qSupported\" response"));
5343 name_end = strchr (p, '=');
5346 /* This is a name=value entry. */
5347 is_supported = PACKET_ENABLE;
5348 value = name_end + 1;
5357 is_supported = PACKET_ENABLE;
5361 is_supported = PACKET_DISABLE;
5365 is_supported = PACKET_SUPPORT_UNKNOWN;
5369 warning (_("unrecognized item \"%s\" "
5370 "in \"qSupported\" response"), p);
5376 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
5377 if (strcmp (remote_protocol_features[i].name, p) == 0)
5379 const struct protocol_feature *feature;
5382 feature = &remote_protocol_features[i];
5383 feature->func (this, feature, is_supported, value);
5388 /* If we increased the packet size, make sure to increase the global
5389 buffer size also. We delay this until after parsing the entire
5390 qSupported packet, because this is the same buffer we were
5392 if (rs->buf_size < rs->explicit_packet_size)
5394 rs->buf_size = rs->explicit_packet_size;
5395 rs->buf = (char *) xrealloc (rs->buf, rs->buf_size);
5398 /* Handle the defaults for unmentioned features. */
5399 for (i = 0; i < ARRAY_SIZE (remote_protocol_features); i++)
5402 const struct protocol_feature *feature;
5404 feature = &remote_protocol_features[i];
5405 feature->func (this, feature, feature->default_support, NULL);
5409 /* Serial QUIT handler for the remote serial descriptor.
5411 Defers handling a Ctrl-C until we're done with the current
5412 command/response packet sequence, unless:
5414 - We're setting up the connection. Don't send a remote interrupt
5415 request, as we're not fully synced yet. Quit immediately
5418 - The target has been resumed in the foreground
5419 (target_terminal::is_ours is false) with a synchronous resume
5420 packet, and we're blocked waiting for the stop reply, thus a
5421 Ctrl-C should be immediately sent to the target.
5423 - We get a second Ctrl-C while still within the same serial read or
5424 write. In that case the serial is seemingly wedged --- offer to
5427 - We see a second Ctrl-C without target response, after having
5428 previously interrupted the target. In that case the target/stub
5429 is probably wedged --- offer to quit/disconnect.
5433 remote_target::remote_serial_quit_handler ()
5435 struct remote_state *rs = get_remote_state ();
5437 if (check_quit_flag ())
5439 /* If we're starting up, we're not fully synced yet. Quit
5441 if (rs->starting_up)
5443 else if (rs->got_ctrlc_during_io)
5445 if (query (_("The target is not responding to GDB commands.\n"
5446 "Stop debugging it? ")))
5447 remote_unpush_and_throw ();
5449 /* If ^C has already been sent once, offer to disconnect. */
5450 else if (!target_terminal::is_ours () && rs->ctrlc_pending_p)
5452 /* All-stop protocol, and blocked waiting for stop reply. Send
5453 an interrupt request. */
5454 else if (!target_terminal::is_ours () && rs->waiting_for_stop_reply)
5455 target_interrupt ();
5457 rs->got_ctrlc_during_io = 1;
5461 /* The remote_target that is current while the quit handler is
5462 overridden with remote_serial_quit_handler. */
5463 static remote_target *curr_quit_handler_target;
5466 remote_serial_quit_handler ()
5468 curr_quit_handler_target->remote_serial_quit_handler ();
5471 /* Remove any of the remote.c targets from target stack. Upper targets depend
5472 on it so remove them first. */
5475 remote_unpush_target (void)
5477 pop_all_targets_at_and_above (process_stratum);
5481 remote_unpush_and_throw (void)
5483 remote_unpush_target ();
5484 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
5488 remote_target::open_1 (const char *name, int from_tty, int extended_p)
5490 remote_target *curr_remote = get_current_remote_target ();
5493 error (_("To open a remote debug connection, you need to specify what\n"
5494 "serial device is attached to the remote system\n"
5495 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5497 /* If we're connected to a running target, target_preopen will kill it.
5498 Ask this question first, before target_preopen has a chance to kill
5500 if (curr_remote != NULL && !have_inferiors ())
5503 && !query (_("Already connected to a remote target. Disconnect? ")))
5504 error (_("Still connected."));
5507 /* Here the possibly existing remote target gets unpushed. */
5508 target_preopen (from_tty);
5510 remote_fileio_reset ();
5511 reopen_exec_file ();
5514 remote_target *remote
5515 = (extended_p ? new extended_remote_target () : new remote_target ());
5516 target_ops_up target_holder (remote);
5518 remote_state *rs = remote->get_remote_state ();
5520 /* See FIXME above. */
5521 if (!target_async_permitted)
5522 rs->wait_forever_enabled_p = 1;
5524 rs->remote_desc = remote_serial_open (name);
5525 if (!rs->remote_desc)
5526 perror_with_name (name);
5528 if (baud_rate != -1)
5530 if (serial_setbaudrate (rs->remote_desc, baud_rate))
5532 /* The requested speed could not be set. Error out to
5533 top level after closing remote_desc. Take care to
5534 set remote_desc to NULL to avoid closing remote_desc
5536 serial_close (rs->remote_desc);
5537 rs->remote_desc = NULL;
5538 perror_with_name (name);
5542 serial_setparity (rs->remote_desc, serial_parity);
5543 serial_raw (rs->remote_desc);
5545 /* If there is something sitting in the buffer we might take it as a
5546 response to a command, which would be bad. */
5547 serial_flush_input (rs->remote_desc);
5551 puts_filtered ("Remote debugging using ");
5552 puts_filtered (name);
5553 puts_filtered ("\n");
5556 /* Switch to using the remote target now. */
5557 push_target (remote);
5558 /* The target stack owns the target now. */
5559 target_holder.release ();
5561 /* Register extra event sources in the event loop. */
5562 rs->remote_async_inferior_event_token
5563 = create_async_event_handler (remote_async_inferior_event_handler,
5565 rs->notif_state = remote_notif_state_allocate (remote);
5567 /* Reset the target state; these things will be queried either by
5568 remote_query_supported or as they are needed. */
5569 reset_all_packet_configs_support ();
5570 rs->cached_wait_status = 0;
5571 rs->explicit_packet_size = 0;
5573 rs->extended = extended_p;
5574 rs->waiting_for_stop_reply = 0;
5575 rs->ctrlc_pending_p = 0;
5576 rs->got_ctrlc_during_io = 0;
5578 rs->general_thread = not_sent_ptid;
5579 rs->continue_thread = not_sent_ptid;
5580 rs->remote_traceframe_number = -1;
5582 rs->last_resume_exec_dir = EXEC_FORWARD;
5584 /* Probe for ability to use "ThreadInfo" query, as required. */
5585 rs->use_threadinfo_query = 1;
5586 rs->use_threadextra_query = 1;
5588 rs->readahead_cache.invalidate ();
5590 if (target_async_permitted)
5592 /* FIXME: cagney/1999-09-23: During the initial connection it is
5593 assumed that the target is already ready and able to respond to
5594 requests. Unfortunately remote_start_remote() eventually calls
5595 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5596 around this. Eventually a mechanism that allows
5597 wait_for_inferior() to expect/get timeouts will be
5599 rs->wait_forever_enabled_p = 0;
5602 /* First delete any symbols previously loaded from shared libraries. */
5603 no_shared_libraries (NULL, 0);
5605 /* Start the remote connection. If error() or QUIT, discard this
5606 target (we'd otherwise be in an inconsistent state) and then
5607 propogate the error on up the exception chain. This ensures that
5608 the caller doesn't stumble along blindly assuming that the
5609 function succeeded. The CLI doesn't have this problem but other
5610 UI's, such as MI do.
5612 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5613 this function should return an error indication letting the
5614 caller restore the previous state. Unfortunately the command
5615 ``target remote'' is directly wired to this function making that
5616 impossible. On a positive note, the CLI side of this problem has
5617 been fixed - the function set_cmd_context() makes it possible for
5618 all the ``target ....'' commands to share a common callback
5619 function. See cli-dump.c. */
5624 remote->start_remote (from_tty, extended_p);
5626 CATCH (ex, RETURN_MASK_ALL)
5628 /* Pop the partially set up target - unless something else did
5629 already before throwing the exception. */
5630 if (ex.error != TARGET_CLOSE_ERROR)
5631 remote_unpush_target ();
5632 throw_exception (ex);
5637 remote_btrace_reset (rs);
5639 if (target_async_permitted)
5640 rs->wait_forever_enabled_p = 1;
5643 /* Detach the specified process. */
5646 remote_target::remote_detach_pid (int pid)
5648 struct remote_state *rs = get_remote_state ();
5650 /* This should not be necessary, but the handling for D;PID in
5651 GDBserver versions prior to 8.2 incorrectly assumes that the
5652 selected process points to the same process we're detaching,
5653 leading to misbehavior (and possibly GDBserver crashing) when it
5654 does not. Since it's easy and cheap, work around it by forcing
5655 GDBserver to select GDB's current process. */
5656 set_general_process ();
5658 if (remote_multi_process_p (rs))
5659 xsnprintf (rs->buf, get_remote_packet_size (), "D;%x", pid);
5661 strcpy (rs->buf, "D");
5664 getpkt (&rs->buf, &rs->buf_size, 0);
5666 if (rs->buf[0] == 'O' && rs->buf[1] == 'K')
5668 else if (rs->buf[0] == '\0')
5669 error (_("Remote doesn't know how to detach"));
5671 error (_("Can't detach process."));
5674 /* This detaches a program to which we previously attached, using
5675 inferior_ptid to identify the process. After this is done, GDB
5676 can be used to debug some other program. We better not have left
5677 any breakpoints in the target program or it'll die when it hits
5681 remote_target::remote_detach_1 (inferior *inf, int from_tty)
5683 int pid = inferior_ptid.pid ();
5684 struct remote_state *rs = get_remote_state ();
5687 if (!target_has_execution)
5688 error (_("No process to detach from."));
5690 target_announce_detach (from_tty);
5692 /* Tell the remote target to detach. */
5693 remote_detach_pid (pid);
5695 /* Exit only if this is the only active inferior. */
5696 if (from_tty && !rs->extended && number_of_live_inferiors () == 1)
5697 puts_filtered (_("Ending remote debugging.\n"));
5699 struct thread_info *tp = find_thread_ptid (inferior_ptid);
5701 /* Check to see if we are detaching a fork parent. Note that if we
5702 are detaching a fork child, tp == NULL. */
5703 is_fork_parent = (tp != NULL
5704 && tp->pending_follow.kind == TARGET_WAITKIND_FORKED);
5706 /* If doing detach-on-fork, we don't mourn, because that will delete
5707 breakpoints that should be available for the followed inferior. */
5708 if (!is_fork_parent)
5710 /* Save the pid as a string before mourning, since that will
5711 unpush the remote target, and we need the string after. */
5712 std::string infpid = target_pid_to_str (ptid_t (pid));
5714 target_mourn_inferior (inferior_ptid);
5715 if (print_inferior_events)
5716 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5717 inf->num, infpid.c_str ());
5721 inferior_ptid = null_ptid;
5722 detach_inferior (current_inferior ());
5727 remote_target::detach (inferior *inf, int from_tty)
5729 remote_detach_1 (inf, from_tty);
5733 extended_remote_target::detach (inferior *inf, int from_tty)
5735 remote_detach_1 (inf, from_tty);
5738 /* Target follow-fork function for remote targets. On entry, and
5739 at return, the current inferior is the fork parent.
5741 Note that although this is currently only used for extended-remote,
5742 it is named remote_follow_fork in anticipation of using it for the
5743 remote target as well. */
5746 remote_target::follow_fork (int follow_child, int detach_fork)
5748 struct remote_state *rs = get_remote_state ();
5749 enum target_waitkind kind = inferior_thread ()->pending_follow.kind;
5751 if ((kind == TARGET_WAITKIND_FORKED && remote_fork_event_p (rs))
5752 || (kind == TARGET_WAITKIND_VFORKED && remote_vfork_event_p (rs)))
5754 /* When following the parent and detaching the child, we detach
5755 the child here. For the case of following the child and
5756 detaching the parent, the detach is done in the target-
5757 independent follow fork code in infrun.c. We can't use
5758 target_detach when detaching an unfollowed child because
5759 the client side doesn't know anything about the child. */
5760 if (detach_fork && !follow_child)
5762 /* Detach the fork child. */
5766 child_ptid = inferior_thread ()->pending_follow.value.related_pid;
5767 child_pid = child_ptid.pid ();
5769 remote_detach_pid (child_pid);
5775 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5776 in the program space of the new inferior. On entry and at return the
5777 current inferior is the exec'ing inferior. INF is the new exec'd
5778 inferior, which may be the same as the exec'ing inferior unless
5779 follow-exec-mode is "new". */
5782 remote_target::follow_exec (struct inferior *inf, char *execd_pathname)
5784 /* We know that this is a target file name, so if it has the "target:"
5785 prefix we strip it off before saving it in the program space. */
5786 if (is_target_filename (execd_pathname))
5787 execd_pathname += strlen (TARGET_SYSROOT_PREFIX);
5789 set_pspace_remote_exec_file (inf->pspace, execd_pathname);
5792 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5795 remote_target::disconnect (const char *args, int from_tty)
5798 error (_("Argument given to \"disconnect\" when remotely debugging."));
5800 /* Make sure we unpush even the extended remote targets. Calling
5801 target_mourn_inferior won't unpush, and remote_mourn won't
5802 unpush if there is more than one inferior left. */
5803 unpush_target (this);
5804 generic_mourn_inferior ();
5807 puts_filtered ("Ending remote debugging.\n");
5810 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5811 be chatty about it. */
5814 extended_remote_target::attach (const char *args, int from_tty)
5816 struct remote_state *rs = get_remote_state ();
5818 char *wait_status = NULL;
5820 pid = parse_pid_to_attach (args);
5822 /* Remote PID can be freely equal to getpid, do not check it here the same
5823 way as in other targets. */
5825 if (packet_support (PACKET_vAttach) == PACKET_DISABLE)
5826 error (_("This target does not support attaching to a process"));
5830 char *exec_file = get_exec_file (0);
5833 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file,
5834 target_pid_to_str (ptid_t (pid)));
5836 printf_unfiltered (_("Attaching to %s\n"),
5837 target_pid_to_str (ptid_t (pid)));
5839 gdb_flush (gdb_stdout);
5842 xsnprintf (rs->buf, get_remote_packet_size (), "vAttach;%x", pid);
5844 getpkt (&rs->buf, &rs->buf_size, 0);
5846 switch (packet_ok (rs->buf,
5847 &remote_protocol_packets[PACKET_vAttach]))
5850 if (!target_is_non_stop_p ())
5852 /* Save the reply for later. */
5853 wait_status = (char *) alloca (strlen (rs->buf) + 1);
5854 strcpy (wait_status, rs->buf);
5856 else if (strcmp (rs->buf, "OK") != 0)
5857 error (_("Attaching to %s failed with: %s"),
5858 target_pid_to_str (ptid_t (pid)),
5861 case PACKET_UNKNOWN:
5862 error (_("This target does not support attaching to a process"));
5864 error (_("Attaching to %s failed"),
5865 target_pid_to_str (ptid_t (pid)));
5868 set_current_inferior (remote_add_inferior (0, pid, 1, 0));
5870 inferior_ptid = ptid_t (pid);
5872 if (target_is_non_stop_p ())
5874 struct thread_info *thread;
5876 /* Get list of threads. */
5877 update_thread_list ();
5879 thread = first_thread_of_inferior (current_inferior ());
5881 inferior_ptid = thread->ptid;
5883 inferior_ptid = ptid_t (pid);
5885 /* Invalidate our notion of the remote current thread. */
5886 record_currthread (rs, minus_one_ptid);
5890 /* Now, if we have thread information, update inferior_ptid. */
5891 inferior_ptid = remote_current_thread (inferior_ptid);
5893 /* Add the main thread to the thread list. */
5894 thread_info *thr = add_thread_silent (inferior_ptid);
5895 /* Don't consider the thread stopped until we've processed the
5896 saved stop reply. */
5897 set_executing (thr->ptid, true);
5900 /* Next, if the target can specify a description, read it. We do
5901 this before anything involving memory or registers. */
5902 target_find_description ();
5904 if (!target_is_non_stop_p ())
5906 /* Use the previously fetched status. */
5907 gdb_assert (wait_status != NULL);
5909 if (target_can_async_p ())
5911 struct notif_event *reply
5912 = remote_notif_parse (this, ¬if_client_stop, wait_status);
5914 push_stop_reply ((struct stop_reply *) reply);
5920 gdb_assert (wait_status != NULL);
5921 strcpy (rs->buf, wait_status);
5922 rs->cached_wait_status = 1;
5926 gdb_assert (wait_status == NULL);
5929 /* Implementation of the to_post_attach method. */
5932 extended_remote_target::post_attach (int pid)
5934 /* Get text, data & bss offsets. */
5937 /* In certain cases GDB might not have had the chance to start
5938 symbol lookup up until now. This could happen if the debugged
5939 binary is not using shared libraries, the vsyscall page is not
5940 present (on Linux) and the binary itself hadn't changed since the
5941 debugging process was started. */
5942 if (symfile_objfile != NULL)
5943 remote_check_symbols();
5947 /* Check for the availability of vCont. This function should also check
5951 remote_target::remote_vcont_probe ()
5953 remote_state *rs = get_remote_state ();
5956 strcpy (rs->buf, "vCont?");
5958 getpkt (&rs->buf, &rs->buf_size, 0);
5961 /* Make sure that the features we assume are supported. */
5962 if (startswith (buf, "vCont"))
5965 int support_c, support_C;
5967 rs->supports_vCont.s = 0;
5968 rs->supports_vCont.S = 0;
5971 rs->supports_vCont.t = 0;
5972 rs->supports_vCont.r = 0;
5973 while (p && *p == ';')
5976 if (*p == 's' && (*(p + 1) == ';' || *(p + 1) == 0))
5977 rs->supports_vCont.s = 1;
5978 else if (*p == 'S' && (*(p + 1) == ';' || *(p + 1) == 0))
5979 rs->supports_vCont.S = 1;
5980 else if (*p == 'c' && (*(p + 1) == ';' || *(p + 1) == 0))
5982 else if (*p == 'C' && (*(p + 1) == ';' || *(p + 1) == 0))
5984 else if (*p == 't' && (*(p + 1) == ';' || *(p + 1) == 0))
5985 rs->supports_vCont.t = 1;
5986 else if (*p == 'r' && (*(p + 1) == ';' || *(p + 1) == 0))
5987 rs->supports_vCont.r = 1;
5989 p = strchr (p, ';');
5992 /* If c, and C are not all supported, we can't use vCont. Clearing
5993 BUF will make packet_ok disable the packet. */
5994 if (!support_c || !support_C)
5998 packet_ok (buf, &remote_protocol_packets[PACKET_vCont]);
6001 /* Helper function for building "vCont" resumptions. Write a
6002 resumption to P. ENDP points to one-passed-the-end of the buffer
6003 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6004 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6005 resumed thread should be single-stepped and/or signalled. If PTID
6006 equals minus_one_ptid, then all threads are resumed; if PTID
6007 represents a process, then all threads of the process are resumed;
6008 the thread to be stepped and/or signalled is given in the global
6012 remote_target::append_resumption (char *p, char *endp,
6013 ptid_t ptid, int step, gdb_signal siggnal)
6015 struct remote_state *rs = get_remote_state ();
6017 if (step && siggnal != GDB_SIGNAL_0)
6018 p += xsnprintf (p, endp - p, ";S%02x", siggnal);
6020 /* GDB is willing to range step. */
6021 && use_range_stepping
6022 /* Target supports range stepping. */
6023 && rs->supports_vCont.r
6024 /* We don't currently support range stepping multiple
6025 threads with a wildcard (though the protocol allows it,
6026 so stubs shouldn't make an active effort to forbid
6028 && !(remote_multi_process_p (rs) && ptid.is_pid ()))
6030 struct thread_info *tp;
6032 if (ptid == minus_one_ptid)
6034 /* If we don't know about the target thread's tid, then
6035 we're resuming magic_null_ptid (see caller). */
6036 tp = find_thread_ptid (magic_null_ptid);
6039 tp = find_thread_ptid (ptid);
6040 gdb_assert (tp != NULL);
6042 if (tp->control.may_range_step)
6044 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
6046 p += xsnprintf (p, endp - p, ";r%s,%s",
6047 phex_nz (tp->control.step_range_start,
6049 phex_nz (tp->control.step_range_end,
6053 p += xsnprintf (p, endp - p, ";s");
6056 p += xsnprintf (p, endp - p, ";s");
6057 else if (siggnal != GDB_SIGNAL_0)
6058 p += xsnprintf (p, endp - p, ";C%02x", siggnal);
6060 p += xsnprintf (p, endp - p, ";c");
6062 if (remote_multi_process_p (rs) && ptid.is_pid ())
6066 /* All (-1) threads of process. */
6067 nptid = ptid_t (ptid.pid (), -1, 0);
6069 p += xsnprintf (p, endp - p, ":");
6070 p = write_ptid (p, endp, nptid);
6072 else if (ptid != minus_one_ptid)
6074 p += xsnprintf (p, endp - p, ":");
6075 p = write_ptid (p, endp, ptid);
6081 /* Clear the thread's private info on resume. */
6084 resume_clear_thread_private_info (struct thread_info *thread)
6086 if (thread->priv != NULL)
6088 remote_thread_info *priv = get_remote_thread_info (thread);
6090 priv->stop_reason = TARGET_STOPPED_BY_NO_REASON;
6091 priv->watch_data_address = 0;
6095 /* Append a vCont continue-with-signal action for threads that have a
6096 non-zero stop signal. */
6099 remote_target::append_pending_thread_resumptions (char *p, char *endp,
6102 for (thread_info *thread : all_non_exited_threads (ptid))
6103 if (inferior_ptid != thread->ptid
6104 && thread->suspend.stop_signal != GDB_SIGNAL_0)
6106 p = append_resumption (p, endp, thread->ptid,
6107 0, thread->suspend.stop_signal);
6108 thread->suspend.stop_signal = GDB_SIGNAL_0;
6109 resume_clear_thread_private_info (thread);
6115 /* Set the target running, using the packets that use Hc
6119 remote_target::remote_resume_with_hc (ptid_t ptid, int step,
6122 struct remote_state *rs = get_remote_state ();
6125 rs->last_sent_signal = siggnal;
6126 rs->last_sent_step = step;
6128 /* The c/s/C/S resume packets use Hc, so set the continue
6130 if (ptid == minus_one_ptid)
6131 set_continue_thread (any_thread_ptid);
6133 set_continue_thread (ptid);
6135 for (thread_info *thread : all_non_exited_threads ())
6136 resume_clear_thread_private_info (thread);
6139 if (::execution_direction == EXEC_REVERSE)
6141 /* We don't pass signals to the target in reverse exec mode. */
6142 if (info_verbose && siggnal != GDB_SIGNAL_0)
6143 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6146 if (step && packet_support (PACKET_bs) == PACKET_DISABLE)
6147 error (_("Remote reverse-step not supported."));
6148 if (!step && packet_support (PACKET_bc) == PACKET_DISABLE)
6149 error (_("Remote reverse-continue not supported."));
6151 strcpy (buf, step ? "bs" : "bc");
6153 else if (siggnal != GDB_SIGNAL_0)
6155 buf[0] = step ? 'S' : 'C';
6156 buf[1] = tohex (((int) siggnal >> 4) & 0xf);
6157 buf[2] = tohex (((int) siggnal) & 0xf);
6161 strcpy (buf, step ? "s" : "c");
6166 /* Resume the remote inferior by using a "vCont" packet. The thread
6167 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6168 resumed thread should be single-stepped and/or signalled. If PTID
6169 equals minus_one_ptid, then all threads are resumed; the thread to
6170 be stepped and/or signalled is given in the global INFERIOR_PTID.
6171 This function returns non-zero iff it resumes the inferior.
6173 This function issues a strict subset of all possible vCont commands
6177 remote_target::remote_resume_with_vcont (ptid_t ptid, int step,
6178 enum gdb_signal siggnal)
6180 struct remote_state *rs = get_remote_state ();
6184 /* No reverse execution actions defined for vCont. */
6185 if (::execution_direction == EXEC_REVERSE)
6188 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
6189 remote_vcont_probe ();
6191 if (packet_support (PACKET_vCont) == PACKET_DISABLE)
6195 endp = rs->buf + get_remote_packet_size ();
6197 /* If we could generate a wider range of packets, we'd have to worry
6198 about overflowing BUF. Should there be a generic
6199 "multi-part-packet" packet? */
6201 p += xsnprintf (p, endp - p, "vCont");
6203 if (ptid == magic_null_ptid)
6205 /* MAGIC_NULL_PTID means that we don't have any active threads,
6206 so we don't have any TID numbers the inferior will
6207 understand. Make sure to only send forms that do not specify
6209 append_resumption (p, endp, minus_one_ptid, step, siggnal);
6211 else if (ptid == minus_one_ptid || ptid.is_pid ())
6213 /* Resume all threads (of all processes, or of a single
6214 process), with preference for INFERIOR_PTID. This assumes
6215 inferior_ptid belongs to the set of all threads we are about
6217 if (step || siggnal != GDB_SIGNAL_0)
6219 /* Step inferior_ptid, with or without signal. */
6220 p = append_resumption (p, endp, inferior_ptid, step, siggnal);
6223 /* Also pass down any pending signaled resumption for other
6224 threads not the current. */
6225 p = append_pending_thread_resumptions (p, endp, ptid);
6227 /* And continue others without a signal. */
6228 append_resumption (p, endp, ptid, /*step=*/ 0, GDB_SIGNAL_0);
6232 /* Scheduler locking; resume only PTID. */
6233 append_resumption (p, endp, ptid, step, siggnal);
6236 gdb_assert (strlen (rs->buf) < get_remote_packet_size ());
6239 if (target_is_non_stop_p ())
6241 /* In non-stop, the stub replies to vCont with "OK". The stop
6242 reply will be reported asynchronously by means of a `%Stop'
6244 getpkt (&rs->buf, &rs->buf_size, 0);
6245 if (strcmp (rs->buf, "OK") != 0)
6246 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
6252 /* Tell the remote machine to resume. */
6255 remote_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal)
6257 struct remote_state *rs = get_remote_state ();
6259 /* When connected in non-stop mode, the core resumes threads
6260 individually. Resuming remote threads directly in target_resume
6261 would thus result in sending one packet per thread. Instead, to
6262 minimize roundtrip latency, here we just store the resume
6263 request; the actual remote resumption will be done in
6264 target_commit_resume / remote_commit_resume, where we'll be able
6265 to do vCont action coalescing. */
6266 if (target_is_non_stop_p () && ::execution_direction != EXEC_REVERSE)
6268 remote_thread_info *remote_thr;
6270 if (minus_one_ptid == ptid || ptid.is_pid ())
6271 remote_thr = get_remote_thread_info (inferior_ptid);
6273 remote_thr = get_remote_thread_info (ptid);
6275 remote_thr->last_resume_step = step;
6276 remote_thr->last_resume_sig = siggnal;
6280 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6281 (explained in remote-notif.c:handle_notification) so
6282 remote_notif_process is not called. We need find a place where
6283 it is safe to start a 'vNotif' sequence. It is good to do it
6284 before resuming inferior, because inferior was stopped and no RSP
6285 traffic at that moment. */
6286 if (!target_is_non_stop_p ())
6287 remote_notif_process (rs->notif_state, ¬if_client_stop);
6289 rs->last_resume_exec_dir = ::execution_direction;
6291 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6292 if (!remote_resume_with_vcont (ptid, step, siggnal))
6293 remote_resume_with_hc (ptid, step, siggnal);
6295 /* We are about to start executing the inferior, let's register it
6296 with the event loop. NOTE: this is the one place where all the
6297 execution commands end up. We could alternatively do this in each
6298 of the execution commands in infcmd.c. */
6299 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6300 into infcmd.c in order to allow inferior function calls to work
6301 NOT asynchronously. */
6302 if (target_can_async_p ())
6305 /* We've just told the target to resume. The remote server will
6306 wait for the inferior to stop, and then send a stop reply. In
6307 the mean time, we can't start another command/query ourselves
6308 because the stub wouldn't be ready to process it. This applies
6309 only to the base all-stop protocol, however. In non-stop (which
6310 only supports vCont), the stub replies with an "OK", and is
6311 immediate able to process further serial input. */
6312 if (!target_is_non_stop_p ())
6313 rs->waiting_for_stop_reply = 1;
6316 static int is_pending_fork_parent_thread (struct thread_info *thread);
6318 /* Private per-inferior info for target remote processes. */
6320 struct remote_inferior : public private_inferior
6322 /* Whether we can send a wildcard vCont for this process. */
6323 bool may_wildcard_vcont = true;
6326 /* Get the remote private inferior data associated to INF. */
6328 static remote_inferior *
6329 get_remote_inferior (inferior *inf)
6331 if (inf->priv == NULL)
6332 inf->priv.reset (new remote_inferior);
6334 return static_cast<remote_inferior *> (inf->priv.get ());
6337 /* Class used to track the construction of a vCont packet in the
6338 outgoing packet buffer. This is used to send multiple vCont
6339 packets if we have more actions than would fit a single packet. */
6344 explicit vcont_builder (remote_target *remote)
6351 void push_action (ptid_t ptid, bool step, gdb_signal siggnal);
6356 /* The remote target. */
6357 remote_target *m_remote;
6359 /* Pointer to the first action. P points here if no action has been
6361 char *m_first_action;
6363 /* Where the next action will be appended. */
6366 /* The end of the buffer. Must never write past this. */
6370 /* Prepare the outgoing buffer for a new vCont packet. */
6373 vcont_builder::restart ()
6375 struct remote_state *rs = m_remote->get_remote_state ();
6378 m_endp = rs->buf + m_remote->get_remote_packet_size ();
6379 m_p += xsnprintf (m_p, m_endp - m_p, "vCont");
6380 m_first_action = m_p;
6383 /* If the vCont packet being built has any action, send it to the
6387 vcont_builder::flush ()
6389 struct remote_state *rs;
6391 if (m_p == m_first_action)
6394 rs = m_remote->get_remote_state ();
6395 m_remote->putpkt (rs->buf);
6396 m_remote->getpkt (&rs->buf, &rs->buf_size, 0);
6397 if (strcmp (rs->buf, "OK") != 0)
6398 error (_("Unexpected vCont reply in non-stop mode: %s"), rs->buf);
6401 /* The largest action is range-stepping, with its two addresses. This
6402 is more than sufficient. If a new, bigger action is created, it'll
6403 quickly trigger a failed assertion in append_resumption (and we'll
6405 #define MAX_ACTION_SIZE 200
6407 /* Append a new vCont action in the outgoing packet being built. If
6408 the action doesn't fit the packet along with previous actions, push
6409 what we've got so far to the remote end and start over a new vCont
6410 packet (with the new action). */
6413 vcont_builder::push_action (ptid_t ptid, bool step, gdb_signal siggnal)
6415 char buf[MAX_ACTION_SIZE + 1];
6417 char *endp = m_remote->append_resumption (buf, buf + sizeof (buf),
6418 ptid, step, siggnal);
6420 /* Check whether this new action would fit in the vCont packet along
6421 with previous actions. If not, send what we've got so far and
6422 start a new vCont packet. */
6423 size_t rsize = endp - buf;
6424 if (rsize > m_endp - m_p)
6429 /* Should now fit. */
6430 gdb_assert (rsize <= m_endp - m_p);
6433 memcpy (m_p, buf, rsize);
6438 /* to_commit_resume implementation. */
6441 remote_target::commit_resume ()
6443 int any_process_wildcard;
6444 int may_global_wildcard_vcont;
6446 /* If connected in all-stop mode, we'd send the remote resume
6447 request directly from remote_resume. Likewise if
6448 reverse-debugging, as there are no defined vCont actions for
6449 reverse execution. */
6450 if (!target_is_non_stop_p () || ::execution_direction == EXEC_REVERSE)
6453 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6454 instead of resuming all threads of each process individually.
6455 However, if any thread of a process must remain halted, we can't
6456 send wildcard resumes and must send one action per thread.
6458 Care must be taken to not resume threads/processes the server
6459 side already told us are stopped, but the core doesn't know about
6460 yet, because the events are still in the vStopped notification
6463 #1 => vCont s:p1.1;c
6465 #3 <= %Stopped T05 p1.1
6470 #8 (infrun handles the stop for p1.1 and continues stepping)
6471 #9 => vCont s:p1.1;c
6473 The last vCont above would resume thread p1.2 by mistake, because
6474 the server has no idea that the event for p1.2 had not been
6477 The server side must similarly ignore resume actions for the
6478 thread that has a pending %Stopped notification (and any other
6479 threads with events pending), until GDB acks the notification
6480 with vStopped. Otherwise, e.g., the following case is
6483 #1 => g (or any other packet)
6485 #3 <= %Stopped T05 p1.2
6486 #4 => vCont s:p1.1;c
6489 Above, the server must not resume thread p1.2. GDB can't know
6490 that p1.2 stopped until it acks the %Stopped notification, and
6491 since from GDB's perspective all threads should be running, it
6494 Finally, special care must also be given to handling fork/vfork
6495 events. A (v)fork event actually tells us that two processes
6496 stopped -- the parent and the child. Until we follow the fork,
6497 we must not resume the child. Therefore, if we have a pending
6498 fork follow, we must not send a global wildcard resume action
6499 (vCont;c). We can still send process-wide wildcards though. */
6501 /* Start by assuming a global wildcard (vCont;c) is possible. */
6502 may_global_wildcard_vcont = 1;
6504 /* And assume every process is individually wildcard-able too. */
6505 for (inferior *inf : all_non_exited_inferiors ())
6507 remote_inferior *priv = get_remote_inferior (inf);
6509 priv->may_wildcard_vcont = true;
6512 /* Check for any pending events (not reported or processed yet) and
6513 disable process and global wildcard resumes appropriately. */
6514 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont);
6516 for (thread_info *tp : all_non_exited_threads ())
6518 /* If a thread of a process is not meant to be resumed, then we
6519 can't wildcard that process. */
6522 get_remote_inferior (tp->inf)->may_wildcard_vcont = false;
6524 /* And if we can't wildcard a process, we can't wildcard
6525 everything either. */
6526 may_global_wildcard_vcont = 0;
6530 /* If a thread is the parent of an unfollowed fork, then we
6531 can't do a global wildcard, as that would resume the fork
6533 if (is_pending_fork_parent_thread (tp))
6534 may_global_wildcard_vcont = 0;
6537 /* Now let's build the vCont packet(s). Actions must be appended
6538 from narrower to wider scopes (thread -> process -> global). If
6539 we end up with too many actions for a single packet vcont_builder
6540 flushes the current vCont packet to the remote side and starts a
6542 struct vcont_builder vcont_builder (this);
6544 /* Threads first. */
6545 for (thread_info *tp : all_non_exited_threads ())
6547 remote_thread_info *remote_thr = get_remote_thread_info (tp);
6549 if (!tp->executing || remote_thr->vcont_resumed)
6552 gdb_assert (!thread_is_in_step_over_chain (tp));
6554 if (!remote_thr->last_resume_step
6555 && remote_thr->last_resume_sig == GDB_SIGNAL_0
6556 && get_remote_inferior (tp->inf)->may_wildcard_vcont)
6558 /* We'll send a wildcard resume instead. */
6559 remote_thr->vcont_resumed = 1;
6563 vcont_builder.push_action (tp->ptid,
6564 remote_thr->last_resume_step,
6565 remote_thr->last_resume_sig);
6566 remote_thr->vcont_resumed = 1;
6569 /* Now check whether we can send any process-wide wildcard. This is
6570 to avoid sending a global wildcard in the case nothing is
6571 supposed to be resumed. */
6572 any_process_wildcard = 0;
6574 for (inferior *inf : all_non_exited_inferiors ())
6576 if (get_remote_inferior (inf)->may_wildcard_vcont)
6578 any_process_wildcard = 1;
6583 if (any_process_wildcard)
6585 /* If all processes are wildcard-able, then send a single "c"
6586 action, otherwise, send an "all (-1) threads of process"
6587 continue action for each running process, if any. */
6588 if (may_global_wildcard_vcont)
6590 vcont_builder.push_action (minus_one_ptid,
6591 false, GDB_SIGNAL_0);
6595 for (inferior *inf : all_non_exited_inferiors ())
6597 if (get_remote_inferior (inf)->may_wildcard_vcont)
6599 vcont_builder.push_action (ptid_t (inf->pid),
6600 false, GDB_SIGNAL_0);
6606 vcont_builder.flush ();
6611 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6612 thread, all threads of a remote process, or all threads of all
6616 remote_target::remote_stop_ns (ptid_t ptid)
6618 struct remote_state *rs = get_remote_state ();
6620 char *endp = rs->buf + get_remote_packet_size ();
6622 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
6623 remote_vcont_probe ();
6625 if (!rs->supports_vCont.t)
6626 error (_("Remote server does not support stopping threads"));
6628 if (ptid == minus_one_ptid
6629 || (!remote_multi_process_p (rs) && ptid.is_pid ()))
6630 p += xsnprintf (p, endp - p, "vCont;t");
6635 p += xsnprintf (p, endp - p, "vCont;t:");
6638 /* All (-1) threads of process. */
6639 nptid = ptid_t (ptid.pid (), -1, 0);
6642 /* Small optimization: if we already have a stop reply for
6643 this thread, no use in telling the stub we want this
6645 if (peek_stop_reply (ptid))
6651 write_ptid (p, endp, nptid);
6654 /* In non-stop, we get an immediate OK reply. The stop reply will
6655 come in asynchronously by notification. */
6657 getpkt (&rs->buf, &rs->buf_size, 0);
6658 if (strcmp (rs->buf, "OK") != 0)
6659 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid), rs->buf);
6662 /* All-stop version of target_interrupt. Sends a break or a ^C to
6663 interrupt the remote target. It is undefined which thread of which
6664 process reports the interrupt. */
6667 remote_target::remote_interrupt_as ()
6669 struct remote_state *rs = get_remote_state ();
6671 rs->ctrlc_pending_p = 1;
6673 /* If the inferior is stopped already, but the core didn't know
6674 about it yet, just ignore the request. The cached wait status
6675 will be collected in remote_wait. */
6676 if (rs->cached_wait_status)
6679 /* Send interrupt_sequence to remote target. */
6680 send_interrupt_sequence ();
6683 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6684 the remote target. It is undefined which thread of which process
6685 reports the interrupt. Throws an error if the packet is not
6686 supported by the server. */
6689 remote_target::remote_interrupt_ns ()
6691 struct remote_state *rs = get_remote_state ();
6693 char *endp = rs->buf + get_remote_packet_size ();
6695 xsnprintf (p, endp - p, "vCtrlC");
6697 /* In non-stop, we get an immediate OK reply. The stop reply will
6698 come in asynchronously by notification. */
6700 getpkt (&rs->buf, &rs->buf_size, 0);
6702 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vCtrlC]))
6706 case PACKET_UNKNOWN:
6707 error (_("No support for interrupting the remote target."));
6709 error (_("Interrupting target failed: %s"), rs->buf);
6713 /* Implement the to_stop function for the remote targets. */
6716 remote_target::stop (ptid_t ptid)
6719 fprintf_unfiltered (gdb_stdlog, "remote_stop called\n");
6721 if (target_is_non_stop_p ())
6722 remote_stop_ns (ptid);
6725 /* We don't currently have a way to transparently pause the
6726 remote target in all-stop mode. Interrupt it instead. */
6727 remote_interrupt_as ();
6731 /* Implement the to_interrupt function for the remote targets. */
6734 remote_target::interrupt ()
6737 fprintf_unfiltered (gdb_stdlog, "remote_interrupt called\n");
6739 if (target_is_non_stop_p ())
6740 remote_interrupt_ns ();
6742 remote_interrupt_as ();
6745 /* Implement the to_pass_ctrlc function for the remote targets. */
6748 remote_target::pass_ctrlc ()
6750 struct remote_state *rs = get_remote_state ();
6753 fprintf_unfiltered (gdb_stdlog, "remote_pass_ctrlc called\n");
6755 /* If we're starting up, we're not fully synced yet. Quit
6757 if (rs->starting_up)
6759 /* If ^C has already been sent once, offer to disconnect. */
6760 else if (rs->ctrlc_pending_p)
6763 target_interrupt ();
6766 /* Ask the user what to do when an interrupt is received. */
6769 remote_target::interrupt_query ()
6771 struct remote_state *rs = get_remote_state ();
6773 if (rs->waiting_for_stop_reply && rs->ctrlc_pending_p)
6775 if (query (_("The target is not responding to interrupt requests.\n"
6776 "Stop debugging it? ")))
6778 remote_unpush_target ();
6779 throw_error (TARGET_CLOSE_ERROR, _("Disconnected from target."));
6784 if (query (_("Interrupted while waiting for the program.\n"
6785 "Give up waiting? ")))
6790 /* Enable/disable target terminal ownership. Most targets can use
6791 terminal groups to control terminal ownership. Remote targets are
6792 different in that explicit transfer of ownership to/from GDB/target
6796 remote_target::terminal_inferior ()
6798 /* NOTE: At this point we could also register our selves as the
6799 recipient of all input. Any characters typed could then be
6800 passed on down to the target. */
6804 remote_target::terminal_ours ()
6809 remote_console_output (char *msg)
6813 for (p = msg; p[0] && p[1]; p += 2)
6816 char c = fromhex (p[0]) * 16 + fromhex (p[1]);
6820 fputs_unfiltered (tb, gdb_stdtarg);
6822 gdb_flush (gdb_stdtarg);
6825 DEF_VEC_O(cached_reg_t);
6827 typedef struct stop_reply
6829 struct notif_event base;
6831 /* The identifier of the thread about this event */
6834 /* The remote state this event is associated with. When the remote
6835 connection, represented by a remote_state object, is closed,
6836 all the associated stop_reply events should be released. */
6837 struct remote_state *rs;
6839 struct target_waitstatus ws;
6841 /* The architecture associated with the expedited registers. */
6844 /* Expedited registers. This makes remote debugging a bit more
6845 efficient for those targets that provide critical registers as
6846 part of their normal status mechanism (as another roundtrip to
6847 fetch them is avoided). */
6848 VEC(cached_reg_t) *regcache;
6850 enum target_stop_reason stop_reason;
6852 CORE_ADDR watch_data_address;
6858 stop_reply_xfree (struct stop_reply *r)
6860 notif_event_xfree ((struct notif_event *) r);
6863 /* Return the length of the stop reply queue. */
6866 remote_target::stop_reply_queue_length ()
6868 remote_state *rs = get_remote_state ();
6869 return rs->stop_reply_queue.size ();
6873 remote_notif_stop_parse (remote_target *remote,
6874 struct notif_client *self, char *buf,
6875 struct notif_event *event)
6877 remote->remote_parse_stop_reply (buf, (struct stop_reply *) event);
6881 remote_notif_stop_ack (remote_target *remote,
6882 struct notif_client *self, char *buf,
6883 struct notif_event *event)
6885 struct stop_reply *stop_reply = (struct stop_reply *) event;
6888 putpkt (remote, self->ack_command);
6890 if (stop_reply->ws.kind == TARGET_WAITKIND_IGNORE)
6892 /* We got an unknown stop reply. */
6893 error (_("Unknown stop reply"));
6896 remote->push_stop_reply (stop_reply);
6900 remote_notif_stop_can_get_pending_events (remote_target *remote,
6901 struct notif_client *self)
6903 /* We can't get pending events in remote_notif_process for
6904 notification stop, and we have to do this in remote_wait_ns
6905 instead. If we fetch all queued events from stub, remote stub
6906 may exit and we have no chance to process them back in
6908 remote_state *rs = remote->get_remote_state ();
6909 mark_async_event_handler (rs->remote_async_inferior_event_token);
6914 stop_reply_dtr (struct notif_event *event)
6916 struct stop_reply *r = (struct stop_reply *) event;
6921 VEC_iterate (cached_reg_t, r->regcache, ix, reg);
6925 VEC_free (cached_reg_t, r->regcache);
6928 static struct notif_event *
6929 remote_notif_stop_alloc_reply (void)
6931 /* We cast to a pointer to the "base class". */
6932 struct notif_event *r = (struct notif_event *) XNEW (struct stop_reply);
6934 r->dtr = stop_reply_dtr;
6939 /* A client of notification Stop. */
6941 struct notif_client notif_client_stop =
6945 remote_notif_stop_parse,
6946 remote_notif_stop_ack,
6947 remote_notif_stop_can_get_pending_events,
6948 remote_notif_stop_alloc_reply,
6952 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6953 the pid of the process that owns the threads we want to check, or
6954 -1 if we want to check all threads. */
6957 is_pending_fork_parent (struct target_waitstatus *ws, int event_pid,
6960 if (ws->kind == TARGET_WAITKIND_FORKED
6961 || ws->kind == TARGET_WAITKIND_VFORKED)
6963 if (event_pid == -1 || event_pid == thread_ptid.pid ())
6970 /* Return the thread's pending status used to determine whether the
6971 thread is a fork parent stopped at a fork event. */
6973 static struct target_waitstatus *
6974 thread_pending_fork_status (struct thread_info *thread)
6976 if (thread->suspend.waitstatus_pending_p)
6977 return &thread->suspend.waitstatus;
6979 return &thread->pending_follow;
6982 /* Determine if THREAD is a pending fork parent thread. */
6985 is_pending_fork_parent_thread (struct thread_info *thread)
6987 struct target_waitstatus *ws = thread_pending_fork_status (thread);
6990 return is_pending_fork_parent (ws, pid, thread->ptid);
6993 /* If CONTEXT contains any fork child threads that have not been
6994 reported yet, remove them from the CONTEXT list. If such a
6995 thread exists it is because we are stopped at a fork catchpoint
6996 and have not yet called follow_fork, which will set up the
6997 host-side data structures for the new process. */
7000 remote_target::remove_new_fork_children (threads_listing_context *context)
7003 struct notif_client *notif = ¬if_client_stop;
7005 /* For any threads stopped at a fork event, remove the corresponding
7006 fork child threads from the CONTEXT list. */
7007 for (thread_info *thread : all_non_exited_threads ())
7009 struct target_waitstatus *ws = thread_pending_fork_status (thread);
7011 if (is_pending_fork_parent (ws, pid, thread->ptid))
7012 context->remove_thread (ws->value.related_pid);
7015 /* Check for any pending fork events (not reported or processed yet)
7016 in process PID and remove those fork child threads from the
7017 CONTEXT list as well. */
7018 remote_notif_get_pending_events (notif);
7019 for (auto &event : get_remote_state ()->stop_reply_queue)
7020 if (event->ws.kind == TARGET_WAITKIND_FORKED
7021 || event->ws.kind == TARGET_WAITKIND_VFORKED
7022 || event->ws.kind == TARGET_WAITKIND_THREAD_EXITED)
7023 context->remove_thread (event->ws.value.related_pid);
7026 /* Check whether any event pending in the vStopped queue would prevent
7027 a global or process wildcard vCont action. Clear
7028 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7029 and clear the event inferior's may_wildcard_vcont flag if we can't
7030 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7033 remote_target::check_pending_events_prevent_wildcard_vcont
7034 (int *may_global_wildcard)
7036 struct notif_client *notif = ¬if_client_stop;
7038 remote_notif_get_pending_events (notif);
7039 for (auto &event : get_remote_state ()->stop_reply_queue)
7041 if (event->ws.kind == TARGET_WAITKIND_NO_RESUMED
7042 || event->ws.kind == TARGET_WAITKIND_NO_HISTORY)
7045 if (event->ws.kind == TARGET_WAITKIND_FORKED
7046 || event->ws.kind == TARGET_WAITKIND_VFORKED)
7047 *may_global_wildcard = 0;
7049 struct inferior *inf = find_inferior_ptid (event->ptid);
7051 /* This may be the first time we heard about this process.
7052 Regardless, we must not do a global wildcard resume, otherwise
7053 we'd resume this process too. */
7054 *may_global_wildcard = 0;
7056 get_remote_inferior (inf)->may_wildcard_vcont = false;
7060 /* Discard all pending stop replies of inferior INF. */
7063 remote_target::discard_pending_stop_replies (struct inferior *inf)
7065 struct stop_reply *reply;
7066 struct remote_state *rs = get_remote_state ();
7067 struct remote_notif_state *rns = rs->notif_state;
7069 /* This function can be notified when an inferior exists. When the
7070 target is not remote, the notification state is NULL. */
7071 if (rs->remote_desc == NULL)
7074 reply = (struct stop_reply *) rns->pending_event[notif_client_stop.id];
7076 /* Discard the in-flight notification. */
7077 if (reply != NULL && reply->ptid.pid () == inf->pid)
7079 stop_reply_xfree (reply);
7080 rns->pending_event[notif_client_stop.id] = NULL;
7083 /* Discard the stop replies we have already pulled with
7085 auto iter = std::remove_if (rs->stop_reply_queue.begin (),
7086 rs->stop_reply_queue.end (),
7087 [=] (const stop_reply_up &event)
7089 return event->ptid.pid () == inf->pid;
7091 rs->stop_reply_queue.erase (iter, rs->stop_reply_queue.end ());
7094 /* Discard the stop replies for RS in stop_reply_queue. */
7097 remote_target::discard_pending_stop_replies_in_queue ()
7099 remote_state *rs = get_remote_state ();
7101 /* Discard the stop replies we have already pulled with
7103 auto iter = std::remove_if (rs->stop_reply_queue.begin (),
7104 rs->stop_reply_queue.end (),
7105 [=] (const stop_reply_up &event)
7107 return event->rs == rs;
7109 rs->stop_reply_queue.erase (iter, rs->stop_reply_queue.end ());
7112 /* Remove the first reply in 'stop_reply_queue' which matches
7116 remote_target::remote_notif_remove_queued_reply (ptid_t ptid)
7118 remote_state *rs = get_remote_state ();
7120 auto iter = std::find_if (rs->stop_reply_queue.begin (),
7121 rs->stop_reply_queue.end (),
7122 [=] (const stop_reply_up &event)
7124 return event->ptid.matches (ptid);
7126 struct stop_reply *result;
7127 if (iter == rs->stop_reply_queue.end ())
7131 result = iter->release ();
7132 rs->stop_reply_queue.erase (iter);
7136 fprintf_unfiltered (gdb_stdlog,
7137 "notif: discard queued event: 'Stop' in %s\n",
7138 target_pid_to_str (ptid));
7143 /* Look for a queued stop reply belonging to PTID. If one is found,
7144 remove it from the queue, and return it. Returns NULL if none is
7145 found. If there are still queued events left to process, tell the
7146 event loop to get back to target_wait soon. */
7149 remote_target::queued_stop_reply (ptid_t ptid)
7151 remote_state *rs = get_remote_state ();
7152 struct stop_reply *r = remote_notif_remove_queued_reply (ptid);
7154 if (!rs->stop_reply_queue.empty ())
7156 /* There's still at least an event left. */
7157 mark_async_event_handler (rs->remote_async_inferior_event_token);
7163 /* Push a fully parsed stop reply in the stop reply queue. Since we
7164 know that we now have at least one queued event left to pass to the
7165 core side, tell the event loop to get back to target_wait soon. */
7168 remote_target::push_stop_reply (struct stop_reply *new_event)
7170 remote_state *rs = get_remote_state ();
7171 rs->stop_reply_queue.push_back (stop_reply_up (new_event));
7174 fprintf_unfiltered (gdb_stdlog,
7175 "notif: push 'Stop' %s to queue %d\n",
7176 target_pid_to_str (new_event->ptid),
7177 int (rs->stop_reply_queue.size ()));
7179 mark_async_event_handler (rs->remote_async_inferior_event_token);
7182 /* Returns true if we have a stop reply for PTID. */
7185 remote_target::peek_stop_reply (ptid_t ptid)
7187 remote_state *rs = get_remote_state ();
7188 for (auto &event : rs->stop_reply_queue)
7189 if (ptid == event->ptid
7190 && event->ws.kind == TARGET_WAITKIND_STOPPED)
7195 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7196 starting with P and ending with PEND matches PREFIX. */
7199 strprefix (const char *p, const char *pend, const char *prefix)
7201 for ( ; p < pend; p++, prefix++)
7204 return *prefix == '\0';
7207 /* Parse the stop reply in BUF. Either the function succeeds, and the
7208 result is stored in EVENT, or throws an error. */
7211 remote_target::remote_parse_stop_reply (char *buf, stop_reply *event)
7213 remote_arch_state *rsa = NULL;
7218 event->ptid = null_ptid;
7219 event->rs = get_remote_state ();
7220 event->ws.kind = TARGET_WAITKIND_IGNORE;
7221 event->ws.value.integer = 0;
7222 event->stop_reason = TARGET_STOPPED_BY_NO_REASON;
7223 event->regcache = NULL;
7228 case 'T': /* Status with PC, SP, FP, ... */
7229 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7230 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7232 n... = register number
7233 r... = register contents
7236 p = &buf[3]; /* after Txx */
7242 p1 = strchr (p, ':');
7244 error (_("Malformed packet(a) (missing colon): %s\n\
7248 error (_("Malformed packet(a) (missing register number): %s\n\
7252 /* Some "registers" are actually extended stop information.
7253 Note if you're adding a new entry here: GDB 7.9 and
7254 earlier assume that all register "numbers" that start
7255 with an hex digit are real register numbers. Make sure
7256 the server only sends such a packet if it knows the
7257 client understands it. */
7259 if (strprefix (p, p1, "thread"))
7260 event->ptid = read_ptid (++p1, &p);
7261 else if (strprefix (p, p1, "syscall_entry"))
7265 event->ws.kind = TARGET_WAITKIND_SYSCALL_ENTRY;
7266 p = unpack_varlen_hex (++p1, &sysno);
7267 event->ws.value.syscall_number = (int) sysno;
7269 else if (strprefix (p, p1, "syscall_return"))
7273 event->ws.kind = TARGET_WAITKIND_SYSCALL_RETURN;
7274 p = unpack_varlen_hex (++p1, &sysno);
7275 event->ws.value.syscall_number = (int) sysno;
7277 else if (strprefix (p, p1, "watch")
7278 || strprefix (p, p1, "rwatch")
7279 || strprefix (p, p1, "awatch"))
7281 event->stop_reason = TARGET_STOPPED_BY_WATCHPOINT;
7282 p = unpack_varlen_hex (++p1, &addr);
7283 event->watch_data_address = (CORE_ADDR) addr;
7285 else if (strprefix (p, p1, "swbreak"))
7287 event->stop_reason = TARGET_STOPPED_BY_SW_BREAKPOINT;
7289 /* Make sure the stub doesn't forget to indicate support
7291 if (packet_support (PACKET_swbreak_feature) != PACKET_ENABLE)
7292 error (_("Unexpected swbreak stop reason"));
7294 /* The value part is documented as "must be empty",
7295 though we ignore it, in case we ever decide to make
7296 use of it in a backward compatible way. */
7297 p = strchrnul (p1 + 1, ';');
7299 else if (strprefix (p, p1, "hwbreak"))
7301 event->stop_reason = TARGET_STOPPED_BY_HW_BREAKPOINT;
7303 /* Make sure the stub doesn't forget to indicate support
7305 if (packet_support (PACKET_hwbreak_feature) != PACKET_ENABLE)
7306 error (_("Unexpected hwbreak stop reason"));
7309 p = strchrnul (p1 + 1, ';');
7311 else if (strprefix (p, p1, "library"))
7313 event->ws.kind = TARGET_WAITKIND_LOADED;
7314 p = strchrnul (p1 + 1, ';');
7316 else if (strprefix (p, p1, "replaylog"))
7318 event->ws.kind = TARGET_WAITKIND_NO_HISTORY;
7319 /* p1 will indicate "begin" or "end", but it makes
7320 no difference for now, so ignore it. */
7321 p = strchrnul (p1 + 1, ';');
7323 else if (strprefix (p, p1, "core"))
7327 p = unpack_varlen_hex (++p1, &c);
7330 else if (strprefix (p, p1, "fork"))
7332 event->ws.value.related_pid = read_ptid (++p1, &p);
7333 event->ws.kind = TARGET_WAITKIND_FORKED;
7335 else if (strprefix (p, p1, "vfork"))
7337 event->ws.value.related_pid = read_ptid (++p1, &p);
7338 event->ws.kind = TARGET_WAITKIND_VFORKED;
7340 else if (strprefix (p, p1, "vforkdone"))
7342 event->ws.kind = TARGET_WAITKIND_VFORK_DONE;
7343 p = strchrnul (p1 + 1, ';');
7345 else if (strprefix (p, p1, "exec"))
7348 char pathname[PATH_MAX];
7351 /* Determine the length of the execd pathname. */
7352 p = unpack_varlen_hex (++p1, &ignored);
7353 pathlen = (p - p1) / 2;
7355 /* Save the pathname for event reporting and for
7356 the next run command. */
7357 hex2bin (p1, (gdb_byte *) pathname, pathlen);
7358 pathname[pathlen] = '\0';
7360 /* This is freed during event handling. */
7361 event->ws.value.execd_pathname = xstrdup (pathname);
7362 event->ws.kind = TARGET_WAITKIND_EXECD;
7364 /* Skip the registers included in this packet, since
7365 they may be for an architecture different from the
7366 one used by the original program. */
7369 else if (strprefix (p, p1, "create"))
7371 event->ws.kind = TARGET_WAITKIND_THREAD_CREATED;
7372 p = strchrnul (p1 + 1, ';');
7381 p = strchrnul (p1 + 1, ';');
7386 /* Maybe a real ``P'' register number. */
7387 p_temp = unpack_varlen_hex (p, &pnum);
7388 /* If the first invalid character is the colon, we got a
7389 register number. Otherwise, it's an unknown stop
7393 /* If we haven't parsed the event's thread yet, find
7394 it now, in order to find the architecture of the
7395 reported expedited registers. */
7396 if (event->ptid == null_ptid)
7398 const char *thr = strstr (p1 + 1, ";thread:");
7400 event->ptid = read_ptid (thr + strlen (";thread:"),
7404 /* Either the current thread hasn't changed,
7405 or the inferior is not multi-threaded.
7406 The event must be for the thread we last
7407 set as (or learned as being) current. */
7408 event->ptid = event->rs->general_thread;
7414 inferior *inf = (event->ptid == null_ptid
7416 : find_inferior_ptid (event->ptid));
7417 /* If this is the first time we learn anything
7418 about this process, skip the registers
7419 included in this packet, since we don't yet
7420 know which architecture to use to parse them.
7421 We'll determine the architecture later when
7422 we process the stop reply and retrieve the
7423 target description, via
7424 remote_notice_new_inferior ->
7425 post_create_inferior. */
7428 p = strchrnul (p1 + 1, ';');
7433 event->arch = inf->gdbarch;
7434 rsa = event->rs->get_remote_arch_state (event->arch);
7438 = packet_reg_from_pnum (event->arch, rsa, pnum);
7439 cached_reg_t cached_reg;
7442 error (_("Remote sent bad register number %s: %s\n\
7444 hex_string (pnum), p, buf);
7446 cached_reg.num = reg->regnum;
7447 cached_reg.data = (gdb_byte *)
7448 xmalloc (register_size (event->arch, reg->regnum));
7451 fieldsize = hex2bin (p, cached_reg.data,
7452 register_size (event->arch, reg->regnum));
7454 if (fieldsize < register_size (event->arch, reg->regnum))
7455 warning (_("Remote reply is too short: %s"), buf);
7457 VEC_safe_push (cached_reg_t, event->regcache, &cached_reg);
7461 /* Not a number. Silently skip unknown optional
7463 p = strchrnul (p1 + 1, ';');
7468 error (_("Remote register badly formatted: %s\nhere: %s"),
7473 if (event->ws.kind != TARGET_WAITKIND_IGNORE)
7477 case 'S': /* Old style status, just signal only. */
7481 event->ws.kind = TARGET_WAITKIND_STOPPED;
7482 sig = (fromhex (buf[1]) << 4) + fromhex (buf[2]);
7483 if (GDB_SIGNAL_FIRST <= sig && sig < GDB_SIGNAL_LAST)
7484 event->ws.value.sig = (enum gdb_signal) sig;
7486 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
7489 case 'w': /* Thread exited. */
7493 event->ws.kind = TARGET_WAITKIND_THREAD_EXITED;
7494 p = unpack_varlen_hex (&buf[1], &value);
7495 event->ws.value.integer = value;
7497 error (_("stop reply packet badly formatted: %s"), buf);
7498 event->ptid = read_ptid (++p, NULL);
7501 case 'W': /* Target exited. */
7507 /* GDB used to accept only 2 hex chars here. Stubs should
7508 only send more if they detect GDB supports multi-process
7510 p = unpack_varlen_hex (&buf[1], &value);
7514 /* The remote process exited. */
7515 event->ws.kind = TARGET_WAITKIND_EXITED;
7516 event->ws.value.integer = value;
7520 /* The remote process exited with a signal. */
7521 event->ws.kind = TARGET_WAITKIND_SIGNALLED;
7522 if (GDB_SIGNAL_FIRST <= value && value < GDB_SIGNAL_LAST)
7523 event->ws.value.sig = (enum gdb_signal) value;
7525 event->ws.value.sig = GDB_SIGNAL_UNKNOWN;
7528 /* If no process is specified, assume inferior_ptid. */
7529 pid = inferior_ptid.pid ();
7538 else if (startswith (p, "process:"))
7542 p += sizeof ("process:") - 1;
7543 unpack_varlen_hex (p, &upid);
7547 error (_("unknown stop reply packet: %s"), buf);
7550 error (_("unknown stop reply packet: %s"), buf);
7551 event->ptid = ptid_t (pid);
7555 event->ws.kind = TARGET_WAITKIND_NO_RESUMED;
7556 event->ptid = minus_one_ptid;
7560 if (target_is_non_stop_p () && event->ptid == null_ptid)
7561 error (_("No process or thread specified in stop reply: %s"), buf);
7564 /* When the stub wants to tell GDB about a new notification reply, it
7565 sends a notification (%Stop, for example). Those can come it at
7566 any time, hence, we have to make sure that any pending
7567 putpkt/getpkt sequence we're making is finished, before querying
7568 the stub for more events with the corresponding ack command
7569 (vStopped, for example). E.g., if we started a vStopped sequence
7570 immediately upon receiving the notification, something like this
7578 1.6) <-- (registers reply to step #1.3)
7580 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7583 To solve this, whenever we parse a %Stop notification successfully,
7584 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7585 doing whatever we were doing:
7591 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7592 2.5) <-- (registers reply to step #2.3)
7594 Eventualy after step #2.5, we return to the event loop, which
7595 notices there's an event on the
7596 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7597 associated callback --- the function below. At this point, we're
7598 always safe to start a vStopped sequence. :
7601 2.7) <-- T05 thread:2
7607 remote_target::remote_notif_get_pending_events (notif_client *nc)
7609 struct remote_state *rs = get_remote_state ();
7611 if (rs->notif_state->pending_event[nc->id] != NULL)
7614 fprintf_unfiltered (gdb_stdlog,
7615 "notif: process: '%s' ack pending event\n",
7619 nc->ack (this, nc, rs->buf, rs->notif_state->pending_event[nc->id]);
7620 rs->notif_state->pending_event[nc->id] = NULL;
7624 getpkt (&rs->buf, &rs->buf_size, 0);
7625 if (strcmp (rs->buf, "OK") == 0)
7628 remote_notif_ack (this, nc, rs->buf);
7634 fprintf_unfiltered (gdb_stdlog,
7635 "notif: process: '%s' no pending reply\n",
7640 /* Wrapper around remote_target::remote_notif_get_pending_events to
7641 avoid having to export the whole remote_target class. */
7644 remote_notif_get_pending_events (remote_target *remote, notif_client *nc)
7646 remote->remote_notif_get_pending_events (nc);
7649 /* Called when it is decided that STOP_REPLY holds the info of the
7650 event that is to be returned to the core. This function always
7651 destroys STOP_REPLY. */
7654 remote_target::process_stop_reply (struct stop_reply *stop_reply,
7655 struct target_waitstatus *status)
7659 *status = stop_reply->ws;
7660 ptid = stop_reply->ptid;
7662 /* If no thread/process was reported by the stub, assume the current
7664 if (ptid == null_ptid)
7665 ptid = inferior_ptid;
7667 if (status->kind != TARGET_WAITKIND_EXITED
7668 && status->kind != TARGET_WAITKIND_SIGNALLED
7669 && status->kind != TARGET_WAITKIND_NO_RESUMED)
7671 /* Expedited registers. */
7672 if (stop_reply->regcache)
7674 struct regcache *regcache
7675 = get_thread_arch_regcache (ptid, stop_reply->arch);
7680 VEC_iterate (cached_reg_t, stop_reply->regcache, ix, reg);
7683 regcache->raw_supply (reg->num, reg->data);
7687 VEC_free (cached_reg_t, stop_reply->regcache);
7690 remote_notice_new_inferior (ptid, 0);
7691 remote_thread_info *remote_thr = get_remote_thread_info (ptid);
7692 remote_thr->core = stop_reply->core;
7693 remote_thr->stop_reason = stop_reply->stop_reason;
7694 remote_thr->watch_data_address = stop_reply->watch_data_address;
7695 remote_thr->vcont_resumed = 0;
7698 stop_reply_xfree (stop_reply);
7702 /* The non-stop mode version of target_wait. */
7705 remote_target::wait_ns (ptid_t ptid, struct target_waitstatus *status, int options)
7707 struct remote_state *rs = get_remote_state ();
7708 struct stop_reply *stop_reply;
7712 /* If in non-stop mode, get out of getpkt even if a
7713 notification is received. */
7715 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
7716 0 /* forever */, &is_notif);
7719 if (ret != -1 && !is_notif)
7722 case 'E': /* Error of some sort. */
7723 /* We're out of sync with the target now. Did it continue
7724 or not? We can't tell which thread it was in non-stop,
7725 so just ignore this. */
7726 warning (_("Remote failure reply: %s"), rs->buf);
7728 case 'O': /* Console output. */
7729 remote_console_output (rs->buf + 1);
7732 warning (_("Invalid remote reply: %s"), rs->buf);
7736 /* Acknowledge a pending stop reply that may have arrived in the
7738 if (rs->notif_state->pending_event[notif_client_stop.id] != NULL)
7739 remote_notif_get_pending_events (¬if_client_stop);
7741 /* If indeed we noticed a stop reply, we're done. */
7742 stop_reply = queued_stop_reply (ptid);
7743 if (stop_reply != NULL)
7744 return process_stop_reply (stop_reply, status);
7746 /* Still no event. If we're just polling for an event, then
7747 return to the event loop. */
7748 if (options & TARGET_WNOHANG)
7750 status->kind = TARGET_WAITKIND_IGNORE;
7751 return minus_one_ptid;
7754 /* Otherwise do a blocking wait. */
7755 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
7756 1 /* forever */, &is_notif);
7760 /* Wait until the remote machine stops, then return, storing status in
7761 STATUS just as `wait' would. */
7764 remote_target::wait_as (ptid_t ptid, target_waitstatus *status, int options)
7766 struct remote_state *rs = get_remote_state ();
7767 ptid_t event_ptid = null_ptid;
7769 struct stop_reply *stop_reply;
7773 status->kind = TARGET_WAITKIND_IGNORE;
7774 status->value.integer = 0;
7776 stop_reply = queued_stop_reply (ptid);
7777 if (stop_reply != NULL)
7778 return process_stop_reply (stop_reply, status);
7780 if (rs->cached_wait_status)
7781 /* Use the cached wait status, but only once. */
7782 rs->cached_wait_status = 0;
7787 int forever = ((options & TARGET_WNOHANG) == 0
7788 && rs->wait_forever_enabled_p);
7790 if (!rs->waiting_for_stop_reply)
7792 status->kind = TARGET_WAITKIND_NO_RESUMED;
7793 return minus_one_ptid;
7796 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7797 _never_ wait for ever -> test on target_is_async_p().
7798 However, before we do that we need to ensure that the caller
7799 knows how to take the target into/out of async mode. */
7800 ret = getpkt_or_notif_sane (&rs->buf, &rs->buf_size,
7801 forever, &is_notif);
7803 /* GDB gets a notification. Return to core as this event is
7805 if (ret != -1 && is_notif)
7806 return minus_one_ptid;
7808 if (ret == -1 && (options & TARGET_WNOHANG) != 0)
7809 return minus_one_ptid;
7814 /* Assume that the target has acknowledged Ctrl-C unless we receive
7815 an 'F' or 'O' packet. */
7816 if (buf[0] != 'F' && buf[0] != 'O')
7817 rs->ctrlc_pending_p = 0;
7821 case 'E': /* Error of some sort. */
7822 /* We're out of sync with the target now. Did it continue or
7823 not? Not is more likely, so report a stop. */
7824 rs->waiting_for_stop_reply = 0;
7826 warning (_("Remote failure reply: %s"), buf);
7827 status->kind = TARGET_WAITKIND_STOPPED;
7828 status->value.sig = GDB_SIGNAL_0;
7830 case 'F': /* File-I/O request. */
7831 /* GDB may access the inferior memory while handling the File-I/O
7832 request, but we don't want GDB accessing memory while waiting
7833 for a stop reply. See the comments in putpkt_binary. Set
7834 waiting_for_stop_reply to 0 temporarily. */
7835 rs->waiting_for_stop_reply = 0;
7836 remote_fileio_request (this, buf, rs->ctrlc_pending_p);
7837 rs->ctrlc_pending_p = 0;
7838 /* GDB handled the File-I/O request, and the target is running
7839 again. Keep waiting for events. */
7840 rs->waiting_for_stop_reply = 1;
7842 case 'N': case 'T': case 'S': case 'X': case 'W':
7844 /* There is a stop reply to handle. */
7845 rs->waiting_for_stop_reply = 0;
7848 = (struct stop_reply *) remote_notif_parse (this,
7852 event_ptid = process_stop_reply (stop_reply, status);
7855 case 'O': /* Console output. */
7856 remote_console_output (buf + 1);
7859 if (rs->last_sent_signal != GDB_SIGNAL_0)
7861 /* Zero length reply means that we tried 'S' or 'C' and the
7862 remote system doesn't support it. */
7863 target_terminal::ours_for_output ();
7865 ("Can't send signals to this remote system. %s not sent.\n",
7866 gdb_signal_to_name (rs->last_sent_signal));
7867 rs->last_sent_signal = GDB_SIGNAL_0;
7868 target_terminal::inferior ();
7870 strcpy (buf, rs->last_sent_step ? "s" : "c");
7876 warning (_("Invalid remote reply: %s"), buf);
7880 if (status->kind == TARGET_WAITKIND_NO_RESUMED)
7881 return minus_one_ptid;
7882 else if (status->kind == TARGET_WAITKIND_IGNORE)
7884 /* Nothing interesting happened. If we're doing a non-blocking
7885 poll, we're done. Otherwise, go back to waiting. */
7886 if (options & TARGET_WNOHANG)
7887 return minus_one_ptid;
7891 else if (status->kind != TARGET_WAITKIND_EXITED
7892 && status->kind != TARGET_WAITKIND_SIGNALLED)
7894 if (event_ptid != null_ptid)
7895 record_currthread (rs, event_ptid);
7897 event_ptid = inferior_ptid;
7900 /* A process exit. Invalidate our notion of current thread. */
7901 record_currthread (rs, minus_one_ptid);
7906 /* Wait until the remote machine stops, then return, storing status in
7907 STATUS just as `wait' would. */
7910 remote_target::wait (ptid_t ptid, struct target_waitstatus *status, int options)
7914 if (target_is_non_stop_p ())
7915 event_ptid = wait_ns (ptid, status, options);
7917 event_ptid = wait_as (ptid, status, options);
7919 if (target_is_async_p ())
7921 remote_state *rs = get_remote_state ();
7923 /* If there are are events left in the queue tell the event loop
7925 if (!rs->stop_reply_queue.empty ())
7926 mark_async_event_handler (rs->remote_async_inferior_event_token);
7932 /* Fetch a single register using a 'p' packet. */
7935 remote_target::fetch_register_using_p (struct regcache *regcache,
7938 struct gdbarch *gdbarch = regcache->arch ();
7939 struct remote_state *rs = get_remote_state ();
7941 gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum));
7944 if (packet_support (PACKET_p) == PACKET_DISABLE)
7947 if (reg->pnum == -1)
7952 p += hexnumstr (p, reg->pnum);
7955 getpkt (&rs->buf, &rs->buf_size, 0);
7959 switch (packet_ok (buf, &remote_protocol_packets[PACKET_p]))
7963 case PACKET_UNKNOWN:
7966 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7967 gdbarch_register_name (regcache->arch (),
7972 /* If this register is unfetchable, tell the regcache. */
7975 regcache->raw_supply (reg->regnum, NULL);
7979 /* Otherwise, parse and supply the value. */
7985 error (_("fetch_register_using_p: early buf termination"));
7987 regp[i++] = fromhex (p[0]) * 16 + fromhex (p[1]);
7990 regcache->raw_supply (reg->regnum, regp);
7994 /* Fetch the registers included in the target's 'g' packet. */
7997 remote_target::send_g_packet ()
7999 struct remote_state *rs = get_remote_state ();
8002 xsnprintf (rs->buf, get_remote_packet_size (), "g");
8004 getpkt (&rs->buf, &rs->buf_size, 0);
8005 if (packet_check_result (rs->buf) == PACKET_ERROR)
8006 error (_("Could not read registers; remote failure reply '%s'"),
8009 /* We can get out of synch in various cases. If the first character
8010 in the buffer is not a hex character, assume that has happened
8011 and try to fetch another packet to read. */
8012 while ((rs->buf[0] < '0' || rs->buf[0] > '9')
8013 && (rs->buf[0] < 'A' || rs->buf[0] > 'F')
8014 && (rs->buf[0] < 'a' || rs->buf[0] > 'f')
8015 && rs->buf[0] != 'x') /* New: unavailable register value. */
8018 fprintf_unfiltered (gdb_stdlog,
8019 "Bad register packet; fetching a new packet\n");
8020 getpkt (&rs->buf, &rs->buf_size, 0);
8023 buf_len = strlen (rs->buf);
8025 /* Sanity check the received packet. */
8026 if (buf_len % 2 != 0)
8027 error (_("Remote 'g' packet reply is of odd length: %s"), rs->buf);
8033 remote_target::process_g_packet (struct regcache *regcache)
8035 struct gdbarch *gdbarch = regcache->arch ();
8036 struct remote_state *rs = get_remote_state ();
8037 remote_arch_state *rsa = rs->get_remote_arch_state (gdbarch);
8042 buf_len = strlen (rs->buf);
8044 /* Further sanity checks, with knowledge of the architecture. */
8045 if (buf_len > 2 * rsa->sizeof_g_packet)
8046 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8047 "bytes): %s"), rsa->sizeof_g_packet, buf_len / 2, rs->buf);
8049 /* Save the size of the packet sent to us by the target. It is used
8050 as a heuristic when determining the max size of packets that the
8051 target can safely receive. */
8052 if (rsa->actual_register_packet_size == 0)
8053 rsa->actual_register_packet_size = buf_len;
8055 /* If this is smaller than we guessed the 'g' packet would be,
8056 update our records. A 'g' reply that doesn't include a register's
8057 value implies either that the register is not available, or that
8058 the 'p' packet must be used. */
8059 if (buf_len < 2 * rsa->sizeof_g_packet)
8061 long sizeof_g_packet = buf_len / 2;
8063 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8065 long offset = rsa->regs[i].offset;
8066 long reg_size = register_size (gdbarch, i);
8068 if (rsa->regs[i].pnum == -1)
8071 if (offset >= sizeof_g_packet)
8072 rsa->regs[i].in_g_packet = 0;
8073 else if (offset + reg_size > sizeof_g_packet)
8074 error (_("Truncated register %d in remote 'g' packet"), i);
8076 rsa->regs[i].in_g_packet = 1;
8079 /* Looks valid enough, we can assume this is the correct length
8080 for a 'g' packet. It's important not to adjust
8081 rsa->sizeof_g_packet if we have truncated registers otherwise
8082 this "if" won't be run the next time the method is called
8083 with a packet of the same size and one of the internal errors
8084 below will trigger instead. */
8085 rsa->sizeof_g_packet = sizeof_g_packet;
8088 regs = (char *) alloca (rsa->sizeof_g_packet);
8090 /* Unimplemented registers read as all bits zero. */
8091 memset (regs, 0, rsa->sizeof_g_packet);
8093 /* Reply describes registers byte by byte, each byte encoded as two
8094 hex characters. Suck them all up, then supply them to the
8095 register cacheing/storage mechanism. */
8098 for (i = 0; i < rsa->sizeof_g_packet; i++)
8100 if (p[0] == 0 || p[1] == 0)
8101 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8102 internal_error (__FILE__, __LINE__,
8103 _("unexpected end of 'g' packet reply"));
8105 if (p[0] == 'x' && p[1] == 'x')
8106 regs[i] = 0; /* 'x' */
8108 regs[i] = fromhex (p[0]) * 16 + fromhex (p[1]);
8112 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8114 struct packet_reg *r = &rsa->regs[i];
8115 long reg_size = register_size (gdbarch, i);
8119 if ((r->offset + reg_size) * 2 > strlen (rs->buf))
8120 /* This shouldn't happen - we adjusted in_g_packet above. */
8121 internal_error (__FILE__, __LINE__,
8122 _("unexpected end of 'g' packet reply"));
8123 else if (rs->buf[r->offset * 2] == 'x')
8125 gdb_assert (r->offset * 2 < strlen (rs->buf));
8126 /* The register isn't available, mark it as such (at
8127 the same time setting the value to zero). */
8128 regcache->raw_supply (r->regnum, NULL);
8131 regcache->raw_supply (r->regnum, regs + r->offset);
8137 remote_target::fetch_registers_using_g (struct regcache *regcache)
8140 process_g_packet (regcache);
8143 /* Make the remote selected traceframe match GDB's selected
8147 remote_target::set_remote_traceframe ()
8150 struct remote_state *rs = get_remote_state ();
8152 if (rs->remote_traceframe_number == get_traceframe_number ())
8155 /* Avoid recursion, remote_trace_find calls us again. */
8156 rs->remote_traceframe_number = get_traceframe_number ();
8158 newnum = target_trace_find (tfind_number,
8159 get_traceframe_number (), 0, 0, NULL);
8161 /* Should not happen. If it does, all bets are off. */
8162 if (newnum != get_traceframe_number ())
8163 warning (_("could not set remote traceframe"));
8167 remote_target::fetch_registers (struct regcache *regcache, int regnum)
8169 struct gdbarch *gdbarch = regcache->arch ();
8170 struct remote_state *rs = get_remote_state ();
8171 remote_arch_state *rsa = rs->get_remote_arch_state (gdbarch);
8174 set_remote_traceframe ();
8175 set_general_thread (regcache->ptid ());
8179 packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum);
8181 gdb_assert (reg != NULL);
8183 /* If this register might be in the 'g' packet, try that first -
8184 we are likely to read more than one register. If this is the
8185 first 'g' packet, we might be overly optimistic about its
8186 contents, so fall back to 'p'. */
8187 if (reg->in_g_packet)
8189 fetch_registers_using_g (regcache);
8190 if (reg->in_g_packet)
8194 if (fetch_register_using_p (regcache, reg))
8197 /* This register is not available. */
8198 regcache->raw_supply (reg->regnum, NULL);
8203 fetch_registers_using_g (regcache);
8205 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8206 if (!rsa->regs[i].in_g_packet)
8207 if (!fetch_register_using_p (regcache, &rsa->regs[i]))
8209 /* This register is not available. */
8210 regcache->raw_supply (i, NULL);
8214 /* Prepare to store registers. Since we may send them all (using a
8215 'G' request), we have to read out the ones we don't want to change
8219 remote_target::prepare_to_store (struct regcache *regcache)
8221 struct remote_state *rs = get_remote_state ();
8222 remote_arch_state *rsa = rs->get_remote_arch_state (regcache->arch ());
8225 /* Make sure the entire registers array is valid. */
8226 switch (packet_support (PACKET_P))
8228 case PACKET_DISABLE:
8229 case PACKET_SUPPORT_UNKNOWN:
8230 /* Make sure all the necessary registers are cached. */
8231 for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++)
8232 if (rsa->regs[i].in_g_packet)
8233 regcache->raw_update (rsa->regs[i].regnum);
8240 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8241 packet was not recognized. */
8244 remote_target::store_register_using_P (const struct regcache *regcache,
8247 struct gdbarch *gdbarch = regcache->arch ();
8248 struct remote_state *rs = get_remote_state ();
8249 /* Try storing a single register. */
8250 char *buf = rs->buf;
8251 gdb_byte *regp = (gdb_byte *) alloca (register_size (gdbarch, reg->regnum));
8254 if (packet_support (PACKET_P) == PACKET_DISABLE)
8257 if (reg->pnum == -1)
8260 xsnprintf (buf, get_remote_packet_size (), "P%s=", phex_nz (reg->pnum, 0));
8261 p = buf + strlen (buf);
8262 regcache->raw_collect (reg->regnum, regp);
8263 bin2hex (regp, p, register_size (gdbarch, reg->regnum));
8265 getpkt (&rs->buf, &rs->buf_size, 0);
8267 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_P]))
8272 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8273 gdbarch_register_name (gdbarch, reg->regnum), rs->buf);
8274 case PACKET_UNKNOWN:
8277 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
8281 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8282 contents of the register cache buffer. FIXME: ignores errors. */
8285 remote_target::store_registers_using_G (const struct regcache *regcache)
8287 struct remote_state *rs = get_remote_state ();
8288 remote_arch_state *rsa = rs->get_remote_arch_state (regcache->arch ());
8292 /* Extract all the registers in the regcache copying them into a
8297 regs = (gdb_byte *) alloca (rsa->sizeof_g_packet);
8298 memset (regs, 0, rsa->sizeof_g_packet);
8299 for (i = 0; i < gdbarch_num_regs (regcache->arch ()); i++)
8301 struct packet_reg *r = &rsa->regs[i];
8304 regcache->raw_collect (r->regnum, regs + r->offset);
8308 /* Command describes registers byte by byte,
8309 each byte encoded as two hex characters. */
8312 bin2hex (regs, p, rsa->sizeof_g_packet);
8314 getpkt (&rs->buf, &rs->buf_size, 0);
8315 if (packet_check_result (rs->buf) == PACKET_ERROR)
8316 error (_("Could not write registers; remote failure reply '%s'"),
8320 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8321 of the register cache buffer. FIXME: ignores errors. */
8324 remote_target::store_registers (struct regcache *regcache, int regnum)
8326 struct gdbarch *gdbarch = regcache->arch ();
8327 struct remote_state *rs = get_remote_state ();
8328 remote_arch_state *rsa = rs->get_remote_arch_state (gdbarch);
8331 set_remote_traceframe ();
8332 set_general_thread (regcache->ptid ());
8336 packet_reg *reg = packet_reg_from_regnum (gdbarch, rsa, regnum);
8338 gdb_assert (reg != NULL);
8340 /* Always prefer to store registers using the 'P' packet if
8341 possible; we often change only a small number of registers.
8342 Sometimes we change a larger number; we'd need help from a
8343 higher layer to know to use 'G'. */
8344 if (store_register_using_P (regcache, reg))
8347 /* For now, don't complain if we have no way to write the
8348 register. GDB loses track of unavailable registers too
8349 easily. Some day, this may be an error. We don't have
8350 any way to read the register, either... */
8351 if (!reg->in_g_packet)
8354 store_registers_using_G (regcache);
8358 store_registers_using_G (regcache);
8360 for (i = 0; i < gdbarch_num_regs (gdbarch); i++)
8361 if (!rsa->regs[i].in_g_packet)
8362 if (!store_register_using_P (regcache, &rsa->regs[i]))
8363 /* See above for why we do not issue an error here. */
8368 /* Return the number of hex digits in num. */
8371 hexnumlen (ULONGEST num)
8375 for (i = 0; num != 0; i++)
8378 return std::max (i, 1);
8381 /* Set BUF to the minimum number of hex digits representing NUM. */
8384 hexnumstr (char *buf, ULONGEST num)
8386 int len = hexnumlen (num);
8388 return hexnumnstr (buf, num, len);
8392 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8395 hexnumnstr (char *buf, ULONGEST num, int width)
8401 for (i = width - 1; i >= 0; i--)
8403 buf[i] = "0123456789abcdef"[(num & 0xf)];
8410 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8413 remote_address_masked (CORE_ADDR addr)
8415 unsigned int address_size = remote_address_size;
8417 /* If "remoteaddresssize" was not set, default to target address size. */
8419 address_size = gdbarch_addr_bit (target_gdbarch ());
8421 if (address_size > 0
8422 && address_size < (sizeof (ULONGEST) * 8))
8424 /* Only create a mask when that mask can safely be constructed
8425 in a ULONGEST variable. */
8428 mask = (mask << address_size) - 1;
8434 /* Determine whether the remote target supports binary downloading.
8435 This is accomplished by sending a no-op memory write of zero length
8436 to the target at the specified address. It does not suffice to send
8437 the whole packet, since many stubs strip the eighth bit and
8438 subsequently compute a wrong checksum, which causes real havoc with
8441 NOTE: This can still lose if the serial line is not eight-bit
8442 clean. In cases like this, the user should clear "remote
8446 remote_target::check_binary_download (CORE_ADDR addr)
8448 struct remote_state *rs = get_remote_state ();
8450 switch (packet_support (PACKET_X))
8452 case PACKET_DISABLE:
8456 case PACKET_SUPPORT_UNKNOWN:
8462 p += hexnumstr (p, (ULONGEST) addr);
8464 p += hexnumstr (p, (ULONGEST) 0);
8468 putpkt_binary (rs->buf, (int) (p - rs->buf));
8469 getpkt (&rs->buf, &rs->buf_size, 0);
8471 if (rs->buf[0] == '\0')
8474 fprintf_unfiltered (gdb_stdlog,
8475 "binary downloading NOT "
8476 "supported by target\n");
8477 remote_protocol_packets[PACKET_X].support = PACKET_DISABLE;
8482 fprintf_unfiltered (gdb_stdlog,
8483 "binary downloading supported by target\n");
8484 remote_protocol_packets[PACKET_X].support = PACKET_ENABLE;
8491 /* Helper function to resize the payload in order to try to get a good
8492 alignment. We try to write an amount of data such that the next write will
8493 start on an address aligned on REMOTE_ALIGN_WRITES. */
8496 align_for_efficient_write (int todo, CORE_ADDR memaddr)
8498 return ((memaddr + todo) & ~(REMOTE_ALIGN_WRITES - 1)) - memaddr;
8501 /* Write memory data directly to the remote machine.
8502 This does not inform the data cache; the data cache uses this.
8503 HEADER is the starting part of the packet.
8504 MEMADDR is the address in the remote memory space.
8505 MYADDR is the address of the buffer in our space.
8506 LEN_UNITS is the number of addressable units to write.
8507 UNIT_SIZE is the length in bytes of an addressable unit.
8508 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8509 should send data as binary ('X'), or hex-encoded ('M').
8511 The function creates packet of the form
8512 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8514 where encoding of <DATA> is terminated by PACKET_FORMAT.
8516 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8519 Return the transferred status, error or OK (an
8520 'enum target_xfer_status' value). Save the number of addressable units
8521 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8523 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8524 exchange between gdb and the stub could look like (?? in place of the
8530 -> $M1000,3:eeeeffffeeee#??
8534 <- eeeeffffeeeedddd */
8537 remote_target::remote_write_bytes_aux (const char *header, CORE_ADDR memaddr,
8538 const gdb_byte *myaddr,
8541 ULONGEST *xfered_len_units,
8542 char packet_format, int use_length)
8544 struct remote_state *rs = get_remote_state ();
8550 int payload_capacity_bytes;
8551 int payload_length_bytes;
8553 if (packet_format != 'X' && packet_format != 'M')
8554 internal_error (__FILE__, __LINE__,
8555 _("remote_write_bytes_aux: bad packet format"));
8558 return TARGET_XFER_EOF;
8560 payload_capacity_bytes = get_memory_write_packet_size ();
8562 /* The packet buffer will be large enough for the payload;
8563 get_memory_packet_size ensures this. */
8566 /* Compute the size of the actual payload by subtracting out the
8567 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8569 payload_capacity_bytes -= strlen ("$,:#NN");
8571 /* The comma won't be used. */
8572 payload_capacity_bytes += 1;
8573 payload_capacity_bytes -= strlen (header);
8574 payload_capacity_bytes -= hexnumlen (memaddr);
8576 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8578 strcat (rs->buf, header);
8579 p = rs->buf + strlen (header);
8581 /* Compute a best guess of the number of bytes actually transfered. */
8582 if (packet_format == 'X')
8584 /* Best guess at number of bytes that will fit. */
8585 todo_units = std::min (len_units,
8586 (ULONGEST) payload_capacity_bytes / unit_size);
8588 payload_capacity_bytes -= hexnumlen (todo_units);
8589 todo_units = std::min (todo_units, payload_capacity_bytes / unit_size);
8593 /* Number of bytes that will fit. */
8595 = std::min (len_units,
8596 (ULONGEST) (payload_capacity_bytes / unit_size) / 2);
8598 payload_capacity_bytes -= hexnumlen (todo_units);
8599 todo_units = std::min (todo_units,
8600 (payload_capacity_bytes / unit_size) / 2);
8603 if (todo_units <= 0)
8604 internal_error (__FILE__, __LINE__,
8605 _("minimum packet size too small to write data"));
8607 /* If we already need another packet, then try to align the end
8608 of this packet to a useful boundary. */
8609 if (todo_units > 2 * REMOTE_ALIGN_WRITES && todo_units < len_units)
8610 todo_units = align_for_efficient_write (todo_units, memaddr);
8612 /* Append "<memaddr>". */
8613 memaddr = remote_address_masked (memaddr);
8614 p += hexnumstr (p, (ULONGEST) memaddr);
8621 /* Append the length and retain its location and size. It may need to be
8622 adjusted once the packet body has been created. */
8624 plenlen = hexnumstr (p, (ULONGEST) todo_units);
8632 /* Append the packet body. */
8633 if (packet_format == 'X')
8635 /* Binary mode. Send target system values byte by byte, in
8636 increasing byte addresses. Only escape certain critical
8638 payload_length_bytes =
8639 remote_escape_output (myaddr, todo_units, unit_size, (gdb_byte *) p,
8640 &units_written, payload_capacity_bytes);
8642 /* If not all TODO units fit, then we'll need another packet. Make
8643 a second try to keep the end of the packet aligned. Don't do
8644 this if the packet is tiny. */
8645 if (units_written < todo_units && units_written > 2 * REMOTE_ALIGN_WRITES)
8649 new_todo_units = align_for_efficient_write (units_written, memaddr);
8651 if (new_todo_units != units_written)
8652 payload_length_bytes =
8653 remote_escape_output (myaddr, new_todo_units, unit_size,
8654 (gdb_byte *) p, &units_written,
8655 payload_capacity_bytes);
8658 p += payload_length_bytes;
8659 if (use_length && units_written < todo_units)
8661 /* Escape chars have filled up the buffer prematurely,
8662 and we have actually sent fewer units than planned.
8663 Fix-up the length field of the packet. Use the same
8664 number of characters as before. */
8665 plen += hexnumnstr (plen, (ULONGEST) units_written,
8667 *plen = ':'; /* overwrite \0 from hexnumnstr() */
8672 /* Normal mode: Send target system values byte by byte, in
8673 increasing byte addresses. Each byte is encoded as a two hex
8675 p += 2 * bin2hex (myaddr, p, todo_units * unit_size);
8676 units_written = todo_units;
8679 putpkt_binary (rs->buf, (int) (p - rs->buf));
8680 getpkt (&rs->buf, &rs->buf_size, 0);
8682 if (rs->buf[0] == 'E')
8683 return TARGET_XFER_E_IO;
8685 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8686 send fewer units than we'd planned. */
8687 *xfered_len_units = (ULONGEST) units_written;
8688 return (*xfered_len_units != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
8691 /* Write memory data directly to the remote machine.
8692 This does not inform the data cache; the data cache uses this.
8693 MEMADDR is the address in the remote memory space.
8694 MYADDR is the address of the buffer in our space.
8695 LEN is the number of bytes.
8697 Return the transferred status, error or OK (an
8698 'enum target_xfer_status' value). Save the number of bytes
8699 transferred in *XFERED_LEN. Only transfer a single packet. */
8702 remote_target::remote_write_bytes (CORE_ADDR memaddr, const gdb_byte *myaddr,
8703 ULONGEST len, int unit_size,
8704 ULONGEST *xfered_len)
8706 const char *packet_format = NULL;
8708 /* Check whether the target supports binary download. */
8709 check_binary_download (memaddr);
8711 switch (packet_support (PACKET_X))
8714 packet_format = "X";
8716 case PACKET_DISABLE:
8717 packet_format = "M";
8719 case PACKET_SUPPORT_UNKNOWN:
8720 internal_error (__FILE__, __LINE__,
8721 _("remote_write_bytes: bad internal state"));
8723 internal_error (__FILE__, __LINE__, _("bad switch"));
8726 return remote_write_bytes_aux (packet_format,
8727 memaddr, myaddr, len, unit_size, xfered_len,
8728 packet_format[0], 1);
8731 /* Read memory data directly from the remote machine.
8732 This does not use the data cache; the data cache uses this.
8733 MEMADDR is the address in the remote memory space.
8734 MYADDR is the address of the buffer in our space.
8735 LEN_UNITS is the number of addressable memory units to read..
8736 UNIT_SIZE is the length in bytes of an addressable unit.
8738 Return the transferred status, error or OK (an
8739 'enum target_xfer_status' value). Save the number of bytes
8740 transferred in *XFERED_LEN_UNITS.
8742 See the comment of remote_write_bytes_aux for an example of
8743 memory read/write exchange between gdb and the stub. */
8746 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr, gdb_byte *myaddr,
8748 int unit_size, ULONGEST *xfered_len_units)
8750 struct remote_state *rs = get_remote_state ();
8751 int buf_size_bytes; /* Max size of packet output buffer. */
8756 buf_size_bytes = get_memory_read_packet_size ();
8757 /* The packet buffer will be large enough for the payload;
8758 get_memory_packet_size ensures this. */
8760 /* Number of units that will fit. */
8761 todo_units = std::min (len_units,
8762 (ULONGEST) (buf_size_bytes / unit_size) / 2);
8764 /* Construct "m"<memaddr>","<len>". */
8765 memaddr = remote_address_masked (memaddr);
8768 p += hexnumstr (p, (ULONGEST) memaddr);
8770 p += hexnumstr (p, (ULONGEST) todo_units);
8773 getpkt (&rs->buf, &rs->buf_size, 0);
8774 if (rs->buf[0] == 'E'
8775 && isxdigit (rs->buf[1]) && isxdigit (rs->buf[2])
8776 && rs->buf[3] == '\0')
8777 return TARGET_XFER_E_IO;
8778 /* Reply describes memory byte by byte, each byte encoded as two hex
8781 decoded_bytes = hex2bin (p, myaddr, todo_units * unit_size);
8782 /* Return what we have. Let higher layers handle partial reads. */
8783 *xfered_len_units = (ULONGEST) (decoded_bytes / unit_size);
8784 return (*xfered_len_units != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
8787 /* Using the set of read-only target sections of remote, read live
8790 For interface/parameters/return description see target.h,
8794 remote_target::remote_xfer_live_readonly_partial (gdb_byte *readbuf,
8798 ULONGEST *xfered_len)
8800 struct target_section *secp;
8801 struct target_section_table *table;
8803 secp = target_section_by_addr (this, memaddr);
8805 && (bfd_get_section_flags (secp->the_bfd_section->owner,
8806 secp->the_bfd_section)
8809 struct target_section *p;
8810 ULONGEST memend = memaddr + len;
8812 table = target_get_section_table (this);
8814 for (p = table->sections; p < table->sections_end; p++)
8816 if (memaddr >= p->addr)
8818 if (memend <= p->endaddr)
8820 /* Entire transfer is within this section. */
8821 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
8824 else if (memaddr >= p->endaddr)
8826 /* This section ends before the transfer starts. */
8831 /* This section overlaps the transfer. Just do half. */
8832 len = p->endaddr - memaddr;
8833 return remote_read_bytes_1 (memaddr, readbuf, len, unit_size,
8840 return TARGET_XFER_EOF;
8843 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8844 first if the requested memory is unavailable in traceframe.
8845 Otherwise, fall back to remote_read_bytes_1. */
8848 remote_target::remote_read_bytes (CORE_ADDR memaddr,
8849 gdb_byte *myaddr, ULONGEST len, int unit_size,
8850 ULONGEST *xfered_len)
8853 return TARGET_XFER_EOF;
8855 if (get_traceframe_number () != -1)
8857 std::vector<mem_range> available;
8859 /* If we fail to get the set of available memory, then the
8860 target does not support querying traceframe info, and so we
8861 attempt reading from the traceframe anyway (assuming the
8862 target implements the old QTro packet then). */
8863 if (traceframe_available_memory (&available, memaddr, len))
8865 if (available.empty () || available[0].start != memaddr)
8867 enum target_xfer_status res;
8869 /* Don't read into the traceframe's available
8871 if (!available.empty ())
8873 LONGEST oldlen = len;
8875 len = available[0].start - memaddr;
8876 gdb_assert (len <= oldlen);
8879 /* This goes through the topmost target again. */
8880 res = remote_xfer_live_readonly_partial (myaddr, memaddr,
8881 len, unit_size, xfered_len);
8882 if (res == TARGET_XFER_OK)
8883 return TARGET_XFER_OK;
8886 /* No use trying further, we know some memory starting
8887 at MEMADDR isn't available. */
8889 return (*xfered_len != 0) ?
8890 TARGET_XFER_UNAVAILABLE : TARGET_XFER_EOF;
8894 /* Don't try to read more than how much is available, in
8895 case the target implements the deprecated QTro packet to
8896 cater for older GDBs (the target's knowledge of read-only
8897 sections may be outdated by now). */
8898 len = available[0].length;
8902 return remote_read_bytes_1 (memaddr, myaddr, len, unit_size, xfered_len);
8907 /* Sends a packet with content determined by the printf format string
8908 FORMAT and the remaining arguments, then gets the reply. Returns
8909 whether the packet was a success, a failure, or unknown. */
8912 remote_target::remote_send_printf (const char *format, ...)
8914 struct remote_state *rs = get_remote_state ();
8915 int max_size = get_remote_packet_size ();
8918 va_start (ap, format);
8921 int size = vsnprintf (rs->buf, max_size, format, ap);
8925 if (size >= max_size)
8926 internal_error (__FILE__, __LINE__, _("Too long remote packet."));
8928 if (putpkt (rs->buf) < 0)
8929 error (_("Communication problem with target."));
8932 getpkt (&rs->buf, &rs->buf_size, 0);
8934 return packet_check_result (rs->buf);
8937 /* Flash writing can take quite some time. We'll set
8938 effectively infinite timeout for flash operations.
8939 In future, we'll need to decide on a better approach. */
8940 static const int remote_flash_timeout = 1000;
8943 remote_target::flash_erase (ULONGEST address, LONGEST length)
8945 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
8946 enum packet_result ret;
8947 scoped_restore restore_timeout
8948 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8950 ret = remote_send_printf ("vFlashErase:%s,%s",
8951 phex (address, addr_size),
8955 case PACKET_UNKNOWN:
8956 error (_("Remote target does not support flash erase"));
8958 error (_("Error erasing flash with vFlashErase packet"));
8965 remote_target::remote_flash_write (ULONGEST address,
8966 ULONGEST length, ULONGEST *xfered_len,
8967 const gdb_byte *data)
8969 scoped_restore restore_timeout
8970 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8971 return remote_write_bytes_aux ("vFlashWrite:", address, data, length, 1,
8976 remote_target::flash_done ()
8980 scoped_restore restore_timeout
8981 = make_scoped_restore (&remote_timeout, remote_flash_timeout);
8983 ret = remote_send_printf ("vFlashDone");
8987 case PACKET_UNKNOWN:
8988 error (_("Remote target does not support vFlashDone"));
8990 error (_("Error finishing flash operation"));
8997 remote_target::files_info ()
8999 puts_filtered ("Debugging a target over a serial line.\n");
9002 /* Stuff for dealing with the packets which are part of this protocol.
9003 See comment at top of file for details. */
9005 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9006 error to higher layers. Called when a serial error is detected.
9007 The exception message is STRING, followed by a colon and a blank,
9008 the system error message for errno at function entry and final dot
9009 for output compatibility with throw_perror_with_name. */
9012 unpush_and_perror (const char *string)
9014 int saved_errno = errno;
9016 remote_unpush_target ();
9017 throw_error (TARGET_CLOSE_ERROR, "%s: %s.", string,
9018 safe_strerror (saved_errno));
9021 /* Read a single character from the remote end. The current quit
9022 handler is overridden to avoid quitting in the middle of packet
9023 sequence, as that would break communication with the remote server.
9024 See remote_serial_quit_handler for more detail. */
9027 remote_target::readchar (int timeout)
9030 struct remote_state *rs = get_remote_state ();
9033 scoped_restore restore_quit_target
9034 = make_scoped_restore (&curr_quit_handler_target, this);
9035 scoped_restore restore_quit
9036 = make_scoped_restore (&quit_handler, ::remote_serial_quit_handler);
9038 rs->got_ctrlc_during_io = 0;
9040 ch = serial_readchar (rs->remote_desc, timeout);
9042 if (rs->got_ctrlc_during_io)
9049 switch ((enum serial_rc) ch)
9052 remote_unpush_target ();
9053 throw_error (TARGET_CLOSE_ERROR, _("Remote connection closed"));
9056 unpush_and_perror (_("Remote communication error. "
9057 "Target disconnected."));
9059 case SERIAL_TIMEOUT:
9065 /* Wrapper for serial_write that closes the target and throws if
9066 writing fails. The current quit handler is overridden to avoid
9067 quitting in the middle of packet sequence, as that would break
9068 communication with the remote server. See
9069 remote_serial_quit_handler for more detail. */
9072 remote_target::remote_serial_write (const char *str, int len)
9074 struct remote_state *rs = get_remote_state ();
9076 scoped_restore restore_quit_target
9077 = make_scoped_restore (&curr_quit_handler_target, this);
9078 scoped_restore restore_quit
9079 = make_scoped_restore (&quit_handler, ::remote_serial_quit_handler);
9081 rs->got_ctrlc_during_io = 0;
9083 if (serial_write (rs->remote_desc, str, len))
9085 unpush_and_perror (_("Remote communication error. "
9086 "Target disconnected."));
9089 if (rs->got_ctrlc_during_io)
9093 /* Return a string representing an escaped version of BUF, of len N.
9094 E.g. \n is converted to \\n, \t to \\t, etc. */
9097 escape_buffer (const char *buf, int n)
9101 stb.putstrn (buf, n, '\\');
9102 return std::move (stb.string ());
9105 /* Display a null-terminated packet on stdout, for debugging, using C
9109 print_packet (const char *buf)
9111 puts_filtered ("\"");
9112 fputstr_filtered (buf, '"', gdb_stdout);
9113 puts_filtered ("\"");
9117 remote_target::putpkt (const char *buf)
9119 return putpkt_binary (buf, strlen (buf));
9122 /* Wrapper around remote_target::putpkt to avoid exporting
9126 putpkt (remote_target *remote, const char *buf)
9128 return remote->putpkt (buf);
9131 /* Send a packet to the remote machine, with error checking. The data
9132 of the packet is in BUF. The string in BUF can be at most
9133 get_remote_packet_size () - 5 to account for the $, # and checksum,
9134 and for a possible /0 if we are debugging (remote_debug) and want
9135 to print the sent packet as a string. */
9138 remote_target::putpkt_binary (const char *buf, int cnt)
9140 struct remote_state *rs = get_remote_state ();
9142 unsigned char csum = 0;
9143 gdb::def_vector<char> data (cnt + 6);
9144 char *buf2 = data.data ();
9150 /* Catch cases like trying to read memory or listing threads while
9151 we're waiting for a stop reply. The remote server wouldn't be
9152 ready to handle this request, so we'd hang and timeout. We don't
9153 have to worry about this in synchronous mode, because in that
9154 case it's not possible to issue a command while the target is
9155 running. This is not a problem in non-stop mode, because in that
9156 case, the stub is always ready to process serial input. */
9157 if (!target_is_non_stop_p ()
9158 && target_is_async_p ()
9159 && rs->waiting_for_stop_reply)
9161 error (_("Cannot execute this command while the target is running.\n"
9162 "Use the \"interrupt\" command to stop the target\n"
9163 "and then try again."));
9166 /* We're sending out a new packet. Make sure we don't look at a
9167 stale cached response. */
9168 rs->cached_wait_status = 0;
9170 /* Copy the packet into buffer BUF2, encapsulating it
9171 and giving it a checksum. */
9176 for (i = 0; i < cnt; i++)
9182 *p++ = tohex ((csum >> 4) & 0xf);
9183 *p++ = tohex (csum & 0xf);
9185 /* Send it over and over until we get a positive ack. */
9189 int started_error_output = 0;
9195 int len = (int) (p - buf2);
9198 = escape_buffer (buf2, std::min (len, REMOTE_DEBUG_MAX_CHAR));
9200 fprintf_unfiltered (gdb_stdlog, "Sending packet: %s", str.c_str ());
9202 if (len > REMOTE_DEBUG_MAX_CHAR)
9203 fprintf_unfiltered (gdb_stdlog, "[%d bytes omitted]",
9204 len - REMOTE_DEBUG_MAX_CHAR);
9206 fprintf_unfiltered (gdb_stdlog, "...");
9208 gdb_flush (gdb_stdlog);
9210 remote_serial_write (buf2, p - buf2);
9212 /* If this is a no acks version of the remote protocol, send the
9213 packet and move on. */
9217 /* Read until either a timeout occurs (-2) or '+' is read.
9218 Handle any notification that arrives in the mean time. */
9221 ch = readchar (remote_timeout);
9229 case SERIAL_TIMEOUT:
9232 if (started_error_output)
9234 putchar_unfiltered ('\n');
9235 started_error_output = 0;
9244 fprintf_unfiltered (gdb_stdlog, "Ack\n");
9248 fprintf_unfiltered (gdb_stdlog, "Nak\n");
9250 case SERIAL_TIMEOUT:
9254 break; /* Retransmit buffer. */
9258 fprintf_unfiltered (gdb_stdlog,
9259 "Packet instead of Ack, ignoring it\n");
9260 /* It's probably an old response sent because an ACK
9261 was lost. Gobble up the packet and ack it so it
9262 doesn't get retransmitted when we resend this
9265 remote_serial_write ("+", 1);
9266 continue; /* Now, go look for +. */
9273 /* If we got a notification, handle it, and go back to looking
9275 /* We've found the start of a notification. Now
9276 collect the data. */
9277 val = read_frame (&rs->buf, &rs->buf_size);
9282 std::string str = escape_buffer (rs->buf, val);
9284 fprintf_unfiltered (gdb_stdlog,
9285 " Notification received: %s\n",
9288 handle_notification (rs->notif_state, rs->buf);
9289 /* We're in sync now, rewait for the ack. */
9296 if (!started_error_output)
9298 started_error_output = 1;
9299 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
9301 fputc_unfiltered (ch & 0177, gdb_stdlog);
9302 fprintf_unfiltered (gdb_stdlog, "%s", rs->buf);
9311 if (!started_error_output)
9313 started_error_output = 1;
9314 fprintf_unfiltered (gdb_stdlog, "putpkt: Junk: ");
9316 fputc_unfiltered (ch & 0177, gdb_stdlog);
9320 break; /* Here to retransmit. */
9324 /* This is wrong. If doing a long backtrace, the user should be
9325 able to get out next time we call QUIT, without anything as
9326 violent as interrupt_query. If we want to provide a way out of
9327 here without getting to the next QUIT, it should be based on
9328 hitting ^C twice as in remote_wait. */
9340 /* Come here after finding the start of a frame when we expected an
9341 ack. Do our best to discard the rest of this packet. */
9344 remote_target::skip_frame ()
9350 c = readchar (remote_timeout);
9353 case SERIAL_TIMEOUT:
9354 /* Nothing we can do. */
9357 /* Discard the two bytes of checksum and stop. */
9358 c = readchar (remote_timeout);
9360 c = readchar (remote_timeout);
9363 case '*': /* Run length encoding. */
9364 /* Discard the repeat count. */
9365 c = readchar (remote_timeout);
9370 /* A regular character. */
9376 /* Come here after finding the start of the frame. Collect the rest
9377 into *BUF, verifying the checksum, length, and handling run-length
9378 compression. NUL terminate the buffer. If there is not enough room,
9379 expand *BUF using xrealloc.
9381 Returns -1 on error, number of characters in buffer (ignoring the
9382 trailing NULL) on success. (could be extended to return one of the
9383 SERIAL status indications). */
9386 remote_target::read_frame (char **buf_p, long *sizeof_buf)
9392 struct remote_state *rs = get_remote_state ();
9399 c = readchar (remote_timeout);
9402 case SERIAL_TIMEOUT:
9404 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog);
9408 fputs_filtered ("Saw new packet start in middle of old one\n",
9410 return -1; /* Start a new packet, count retries. */
9413 unsigned char pktcsum;
9419 check_0 = readchar (remote_timeout);
9421 check_1 = readchar (remote_timeout);
9423 if (check_0 == SERIAL_TIMEOUT || check_1 == SERIAL_TIMEOUT)
9426 fputs_filtered ("Timeout in checksum, retrying\n",
9430 else if (check_0 < 0 || check_1 < 0)
9433 fputs_filtered ("Communication error in checksum\n",
9438 /* Don't recompute the checksum; with no ack packets we
9439 don't have any way to indicate a packet retransmission
9444 pktcsum = (fromhex (check_0) << 4) | fromhex (check_1);
9445 if (csum == pktcsum)
9450 std::string str = escape_buffer (buf, bc);
9452 fprintf_unfiltered (gdb_stdlog,
9453 "Bad checksum, sentsum=0x%x, "
9454 "csum=0x%x, buf=%s\n",
9455 pktcsum, csum, str.c_str ());
9457 /* Number of characters in buffer ignoring trailing
9461 case '*': /* Run length encoding. */
9466 c = readchar (remote_timeout);
9468 repeat = c - ' ' + 3; /* Compute repeat count. */
9470 /* The character before ``*'' is repeated. */
9472 if (repeat > 0 && repeat <= 255 && bc > 0)
9474 if (bc + repeat - 1 >= *sizeof_buf - 1)
9476 /* Make some more room in the buffer. */
9477 *sizeof_buf += repeat;
9478 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
9482 memset (&buf[bc], buf[bc - 1], repeat);
9488 printf_filtered (_("Invalid run length encoding: %s\n"), buf);
9492 if (bc >= *sizeof_buf - 1)
9494 /* Make some more room in the buffer. */
9496 *buf_p = (char *) xrealloc (*buf_p, *sizeof_buf);
9507 /* Read a packet from the remote machine, with error checking, and
9508 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9509 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9510 rather than timing out; this is used (in synchronous mode) to wait
9511 for a target that is is executing user code to stop. */
9512 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9513 don't have to change all the calls to getpkt to deal with the
9514 return value, because at the moment I don't know what the right
9515 thing to do it for those. */
9518 remote_target::getpkt (char **buf, long *sizeof_buf, int forever)
9520 getpkt_sane (buf, sizeof_buf, forever);
9524 /* Read a packet from the remote machine, with error checking, and
9525 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9526 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9527 rather than timing out; this is used (in synchronous mode) to wait
9528 for a target that is is executing user code to stop. If FOREVER ==
9529 0, this function is allowed to time out gracefully and return an
9530 indication of this to the caller. Otherwise return the number of
9531 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9532 enough reason to return to the caller. *IS_NOTIF is an output
9533 boolean that indicates whether *BUF holds a notification or not
9534 (a regular packet). */
9537 remote_target::getpkt_or_notif_sane_1 (char **buf, long *sizeof_buf,
9538 int forever, int expecting_notif,
9541 struct remote_state *rs = get_remote_state ();
9547 /* We're reading a new response. Make sure we don't look at a
9548 previously cached response. */
9549 rs->cached_wait_status = 0;
9551 strcpy (*buf, "timeout");
9554 timeout = watchdog > 0 ? watchdog : -1;
9555 else if (expecting_notif)
9556 timeout = 0; /* There should already be a char in the buffer. If
9559 timeout = remote_timeout;
9563 /* Process any number of notifications, and then return when
9567 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9569 for (tries = 1; tries <= MAX_TRIES; tries++)
9571 /* This can loop forever if the remote side sends us
9572 characters continuously, but if it pauses, we'll get
9573 SERIAL_TIMEOUT from readchar because of timeout. Then
9574 we'll count that as a retry.
9576 Note that even when forever is set, we will only wait
9577 forever prior to the start of a packet. After that, we
9578 expect characters to arrive at a brisk pace. They should
9579 show up within remote_timeout intervals. */
9581 c = readchar (timeout);
9582 while (c != SERIAL_TIMEOUT && c != '$' && c != '%');
9584 if (c == SERIAL_TIMEOUT)
9586 if (expecting_notif)
9587 return -1; /* Don't complain, it's normal to not get
9588 anything in this case. */
9590 if (forever) /* Watchdog went off? Kill the target. */
9592 remote_unpush_target ();
9593 throw_error (TARGET_CLOSE_ERROR,
9594 _("Watchdog timeout has expired. "
9595 "Target detached."));
9598 fputs_filtered ("Timed out.\n", gdb_stdlog);
9602 /* We've found the start of a packet or notification.
9603 Now collect the data. */
9604 val = read_frame (buf, sizeof_buf);
9609 remote_serial_write ("-", 1);
9612 if (tries > MAX_TRIES)
9614 /* We have tried hard enough, and just can't receive the
9615 packet/notification. Give up. */
9616 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9618 /* Skip the ack char if we're in no-ack mode. */
9619 if (!rs->noack_mode)
9620 remote_serial_write ("+", 1);
9624 /* If we got an ordinary packet, return that to our caller. */
9630 = escape_buffer (*buf,
9631 std::min (val, REMOTE_DEBUG_MAX_CHAR));
9633 fprintf_unfiltered (gdb_stdlog, "Packet received: %s",
9636 if (val > REMOTE_DEBUG_MAX_CHAR)
9637 fprintf_unfiltered (gdb_stdlog, "[%d bytes omitted]",
9638 val - REMOTE_DEBUG_MAX_CHAR);
9640 fprintf_unfiltered (gdb_stdlog, "\n");
9643 /* Skip the ack char if we're in no-ack mode. */
9644 if (!rs->noack_mode)
9645 remote_serial_write ("+", 1);
9646 if (is_notif != NULL)
9651 /* If we got a notification, handle it, and go back to looking
9655 gdb_assert (c == '%');
9659 std::string str = escape_buffer (*buf, val);
9661 fprintf_unfiltered (gdb_stdlog,
9662 " Notification received: %s\n",
9665 if (is_notif != NULL)
9668 handle_notification (rs->notif_state, *buf);
9670 /* Notifications require no acknowledgement. */
9672 if (expecting_notif)
9679 remote_target::getpkt_sane (char **buf, long *sizeof_buf, int forever)
9681 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 0, NULL);
9685 remote_target::getpkt_or_notif_sane (char **buf, long *sizeof_buf, int forever,
9688 return getpkt_or_notif_sane_1 (buf, sizeof_buf, forever, 1,
9692 /* Kill any new fork children of process PID that haven't been
9693 processed by follow_fork. */
9696 remote_target::kill_new_fork_children (int pid)
9698 remote_state *rs = get_remote_state ();
9699 struct notif_client *notif = ¬if_client_stop;
9701 /* Kill the fork child threads of any threads in process PID
9702 that are stopped at a fork event. */
9703 for (thread_info *thread : all_non_exited_threads ())
9705 struct target_waitstatus *ws = &thread->pending_follow;
9707 if (is_pending_fork_parent (ws, pid, thread->ptid))
9709 int child_pid = ws->value.related_pid.pid ();
9712 res = remote_vkill (child_pid);
9714 error (_("Can't kill fork child process %d"), child_pid);
9718 /* Check for any pending fork events (not reported or processed yet)
9719 in process PID and kill those fork child threads as well. */
9720 remote_notif_get_pending_events (notif);
9721 for (auto &event : rs->stop_reply_queue)
9722 if (is_pending_fork_parent (&event->ws, pid, event->ptid))
9724 int child_pid = event->ws.value.related_pid.pid ();
9727 res = remote_vkill (child_pid);
9729 error (_("Can't kill fork child process %d"), child_pid);
9734 /* Target hook to kill the current inferior. */
9737 remote_target::kill ()
9740 int pid = inferior_ptid.pid ();
9741 struct remote_state *rs = get_remote_state ();
9743 if (packet_support (PACKET_vKill) != PACKET_DISABLE)
9745 /* If we're stopped while forking and we haven't followed yet,
9746 kill the child task. We need to do this before killing the
9747 parent task because if this is a vfork then the parent will
9749 kill_new_fork_children (pid);
9751 res = remote_vkill (pid);
9754 target_mourn_inferior (inferior_ptid);
9759 /* If we are in 'target remote' mode and we are killing the only
9760 inferior, then we will tell gdbserver to exit and unpush the
9762 if (res == -1 && !remote_multi_process_p (rs)
9763 && number_of_live_inferiors () == 1)
9767 /* We've killed the remote end, we get to mourn it. If we are
9768 not in extended mode, mourning the inferior also unpushes
9769 remote_ops from the target stack, which closes the remote
9771 target_mourn_inferior (inferior_ptid);
9776 error (_("Can't kill process"));
9779 /* Send a kill request to the target using the 'vKill' packet. */
9782 remote_target::remote_vkill (int pid)
9784 if (packet_support (PACKET_vKill) == PACKET_DISABLE)
9787 remote_state *rs = get_remote_state ();
9789 /* Tell the remote target to detach. */
9790 xsnprintf (rs->buf, get_remote_packet_size (), "vKill;%x", pid);
9792 getpkt (&rs->buf, &rs->buf_size, 0);
9794 switch (packet_ok (rs->buf,
9795 &remote_protocol_packets[PACKET_vKill]))
9801 case PACKET_UNKNOWN:
9804 internal_error (__FILE__, __LINE__, _("Bad result from packet_ok"));
9808 /* Send a kill request to the target using the 'k' packet. */
9811 remote_target::remote_kill_k ()
9813 /* Catch errors so the user can quit from gdb even when we
9814 aren't on speaking terms with the remote system. */
9819 CATCH (ex, RETURN_MASK_ERROR)
9821 if (ex.error == TARGET_CLOSE_ERROR)
9823 /* If we got an (EOF) error that caused the target
9824 to go away, then we're done, that's what we wanted.
9825 "k" is susceptible to cause a premature EOF, given
9826 that the remote server isn't actually required to
9827 reply to "k", and it can happen that it doesn't
9828 even get to reply ACK to the "k". */
9832 /* Otherwise, something went wrong. We didn't actually kill
9833 the target. Just propagate the exception, and let the
9834 user or higher layers decide what to do. */
9835 throw_exception (ex);
9841 remote_target::mourn_inferior ()
9843 struct remote_state *rs = get_remote_state ();
9845 /* We're no longer interested in notification events of an inferior
9846 that exited or was killed/detached. */
9847 discard_pending_stop_replies (current_inferior ());
9849 /* In 'target remote' mode with one inferior, we close the connection. */
9850 if (!rs->extended && number_of_live_inferiors () <= 1)
9852 unpush_target (this);
9854 /* remote_close takes care of doing most of the clean up. */
9855 generic_mourn_inferior ();
9859 /* In case we got here due to an error, but we're going to stay
9861 rs->waiting_for_stop_reply = 0;
9863 /* If the current general thread belonged to the process we just
9864 detached from or has exited, the remote side current general
9865 thread becomes undefined. Considering a case like this:
9867 - We just got here due to a detach.
9868 - The process that we're detaching from happens to immediately
9869 report a global breakpoint being hit in non-stop mode, in the
9870 same thread we had selected before.
9871 - GDB attaches to this process again.
9872 - This event happens to be the next event we handle.
9874 GDB would consider that the current general thread didn't need to
9875 be set on the stub side (with Hg), since for all it knew,
9876 GENERAL_THREAD hadn't changed.
9878 Notice that although in all-stop mode, the remote server always
9879 sets the current thread to the thread reporting the stop event,
9880 that doesn't happen in non-stop mode; in non-stop, the stub *must
9881 not* change the current thread when reporting a breakpoint hit,
9882 due to the decoupling of event reporting and event handling.
9884 To keep things simple, we always invalidate our notion of the
9886 record_currthread (rs, minus_one_ptid);
9888 /* Call common code to mark the inferior as not running. */
9889 generic_mourn_inferior ();
9891 if (!have_inferiors ())
9893 if (!remote_multi_process_p (rs))
9895 /* Check whether the target is running now - some remote stubs
9896 automatically restart after kill. */
9898 getpkt (&rs->buf, &rs->buf_size, 0);
9900 if (rs->buf[0] == 'S' || rs->buf[0] == 'T')
9902 /* Assume that the target has been restarted. Set
9903 inferior_ptid so that bits of core GDB realizes
9904 there's something here, e.g., so that the user can
9905 say "kill" again. */
9906 inferior_ptid = magic_null_ptid;
9913 extended_remote_target::supports_disable_randomization ()
9915 return packet_support (PACKET_QDisableRandomization) == PACKET_ENABLE;
9919 remote_target::extended_remote_disable_randomization (int val)
9921 struct remote_state *rs = get_remote_state ();
9924 xsnprintf (rs->buf, get_remote_packet_size (), "QDisableRandomization:%x",
9927 reply = remote_get_noisy_reply ();
9929 error (_("Target does not support QDisableRandomization."));
9930 if (strcmp (reply, "OK") != 0)
9931 error (_("Bogus QDisableRandomization reply from target: %s"), reply);
9935 remote_target::extended_remote_run (const std::string &args)
9937 struct remote_state *rs = get_remote_state ();
9939 const char *remote_exec_file = get_remote_exec_file ();
9941 /* If the user has disabled vRun support, or we have detected that
9942 support is not available, do not try it. */
9943 if (packet_support (PACKET_vRun) == PACKET_DISABLE)
9946 strcpy (rs->buf, "vRun;");
9947 len = strlen (rs->buf);
9949 if (strlen (remote_exec_file) * 2 + len >= get_remote_packet_size ())
9950 error (_("Remote file name too long for run packet"));
9951 len += 2 * bin2hex ((gdb_byte *) remote_exec_file, rs->buf + len,
9952 strlen (remote_exec_file));
9958 gdb_argv argv (args.c_str ());
9959 for (i = 0; argv[i] != NULL; i++)
9961 if (strlen (argv[i]) * 2 + 1 + len >= get_remote_packet_size ())
9962 error (_("Argument list too long for run packet"));
9963 rs->buf[len++] = ';';
9964 len += 2 * bin2hex ((gdb_byte *) argv[i], rs->buf + len,
9969 rs->buf[len++] = '\0';
9972 getpkt (&rs->buf, &rs->buf_size, 0);
9974 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_vRun]))
9977 /* We have a wait response. All is well. */
9979 case PACKET_UNKNOWN:
9982 if (remote_exec_file[0] == '\0')
9983 error (_("Running the default executable on the remote target failed; "
9984 "try \"set remote exec-file\"?"));
9986 error (_("Running \"%s\" on the remote target failed"),
9989 gdb_assert_not_reached (_("bad switch"));
9993 /* Helper function to send set/unset environment packets. ACTION is
9994 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9995 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9999 remote_target::send_environment_packet (const char *action,
10000 const char *packet,
10003 remote_state *rs = get_remote_state ();
10005 /* Convert the environment variable to an hex string, which
10006 is the best format to be transmitted over the wire. */
10007 std::string encoded_value = bin2hex ((const gdb_byte *) value,
10010 xsnprintf (rs->buf, get_remote_packet_size (),
10011 "%s:%s", packet, encoded_value.c_str ());
10014 getpkt (&rs->buf, &rs->buf_size, 0);
10015 if (strcmp (rs->buf, "OK") != 0)
10016 warning (_("Unable to %s environment variable '%s' on remote."),
10020 /* Helper function to handle the QEnvironment* packets. */
10023 remote_target::extended_remote_environment_support ()
10025 remote_state *rs = get_remote_state ();
10027 if (packet_support (PACKET_QEnvironmentReset) != PACKET_DISABLE)
10029 putpkt ("QEnvironmentReset");
10030 getpkt (&rs->buf, &rs->buf_size, 0);
10031 if (strcmp (rs->buf, "OK") != 0)
10032 warning (_("Unable to reset environment on remote."));
10035 gdb_environ *e = ¤t_inferior ()->environment;
10037 if (packet_support (PACKET_QEnvironmentHexEncoded) != PACKET_DISABLE)
10038 for (const std::string &el : e->user_set_env ())
10039 send_environment_packet ("set", "QEnvironmentHexEncoded",
10042 if (packet_support (PACKET_QEnvironmentUnset) != PACKET_DISABLE)
10043 for (const std::string &el : e->user_unset_env ())
10044 send_environment_packet ("unset", "QEnvironmentUnset", el.c_str ());
10047 /* Helper function to set the current working directory for the
10048 inferior in the remote target. */
10051 remote_target::extended_remote_set_inferior_cwd ()
10053 if (packet_support (PACKET_QSetWorkingDir) != PACKET_DISABLE)
10055 const char *inferior_cwd = get_inferior_cwd ();
10056 remote_state *rs = get_remote_state ();
10058 if (inferior_cwd != NULL)
10060 std::string hexpath = bin2hex ((const gdb_byte *) inferior_cwd,
10061 strlen (inferior_cwd));
10063 xsnprintf (rs->buf, get_remote_packet_size (),
10064 "QSetWorkingDir:%s", hexpath.c_str ());
10068 /* An empty inferior_cwd means that the user wants us to
10069 reset the remote server's inferior's cwd. */
10070 xsnprintf (rs->buf, get_remote_packet_size (),
10071 "QSetWorkingDir:");
10075 getpkt (&rs->buf, &rs->buf_size, 0);
10076 if (packet_ok (rs->buf,
10077 &remote_protocol_packets[PACKET_QSetWorkingDir])
10080 Remote replied unexpectedly while setting the inferior's working\n\
10087 /* In the extended protocol we want to be able to do things like
10088 "run" and have them basically work as expected. So we need
10089 a special create_inferior function. We support changing the
10090 executable file and the command line arguments, but not the
10094 extended_remote_target::create_inferior (const char *exec_file,
10095 const std::string &args,
10096 char **env, int from_tty)
10100 struct remote_state *rs = get_remote_state ();
10101 const char *remote_exec_file = get_remote_exec_file ();
10103 /* If running asynchronously, register the target file descriptor
10104 with the event loop. */
10105 if (target_can_async_p ())
10108 /* Disable address space randomization if requested (and supported). */
10109 if (supports_disable_randomization ())
10110 extended_remote_disable_randomization (disable_randomization);
10112 /* If startup-with-shell is on, we inform gdbserver to start the
10113 remote inferior using a shell. */
10114 if (packet_support (PACKET_QStartupWithShell) != PACKET_DISABLE)
10116 xsnprintf (rs->buf, get_remote_packet_size (),
10117 "QStartupWithShell:%d", startup_with_shell ? 1 : 0);
10119 getpkt (&rs->buf, &rs->buf_size, 0);
10120 if (strcmp (rs->buf, "OK") != 0)
10122 Remote replied unexpectedly while setting startup-with-shell: %s"),
10126 extended_remote_environment_support ();
10128 extended_remote_set_inferior_cwd ();
10130 /* Now restart the remote server. */
10131 run_worked = extended_remote_run (args) != -1;
10134 /* vRun was not supported. Fail if we need it to do what the
10136 if (remote_exec_file[0])
10137 error (_("Remote target does not support \"set remote exec-file\""));
10138 if (!args.empty ())
10139 error (_("Remote target does not support \"set args\" or run ARGS"));
10141 /* Fall back to "R". */
10142 extended_remote_restart ();
10145 /* vRun's success return is a stop reply. */
10146 stop_reply = run_worked ? rs->buf : NULL;
10147 add_current_inferior_and_thread (stop_reply);
10149 /* Get updated offsets, if the stub uses qOffsets. */
10154 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10155 the list of conditions (in agent expression bytecode format), if any, the
10156 target needs to evaluate. The output is placed into the packet buffer
10157 started from BUF and ended at BUF_END. */
10160 remote_add_target_side_condition (struct gdbarch *gdbarch,
10161 struct bp_target_info *bp_tgt, char *buf,
10164 if (bp_tgt->conditions.empty ())
10167 buf += strlen (buf);
10168 xsnprintf (buf, buf_end - buf, "%s", ";");
10171 /* Send conditions to the target. */
10172 for (agent_expr *aexpr : bp_tgt->conditions)
10174 xsnprintf (buf, buf_end - buf, "X%x,", aexpr->len);
10175 buf += strlen (buf);
10176 for (int i = 0; i < aexpr->len; ++i)
10177 buf = pack_hex_byte (buf, aexpr->buf[i]);
10184 remote_add_target_side_commands (struct gdbarch *gdbarch,
10185 struct bp_target_info *bp_tgt, char *buf)
10187 if (bp_tgt->tcommands.empty ())
10190 buf += strlen (buf);
10192 sprintf (buf, ";cmds:%x,", bp_tgt->persist);
10193 buf += strlen (buf);
10195 /* Concatenate all the agent expressions that are commands into the
10197 for (agent_expr *aexpr : bp_tgt->tcommands)
10199 sprintf (buf, "X%x,", aexpr->len);
10200 buf += strlen (buf);
10201 for (int i = 0; i < aexpr->len; ++i)
10202 buf = pack_hex_byte (buf, aexpr->buf[i]);
10207 /* Insert a breakpoint. On targets that have software breakpoint
10208 support, we ask the remote target to do the work; on targets
10209 which don't, we insert a traditional memory breakpoint. */
10212 remote_target::insert_breakpoint (struct gdbarch *gdbarch,
10213 struct bp_target_info *bp_tgt)
10215 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10216 If it succeeds, then set the support to PACKET_ENABLE. If it
10217 fails, and the user has explicitly requested the Z support then
10218 report an error, otherwise, mark it disabled and go on. */
10220 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
10222 CORE_ADDR addr = bp_tgt->reqstd_address;
10223 struct remote_state *rs;
10226 /* Make sure the remote is pointing at the right process, if
10228 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10229 set_general_process ();
10231 rs = get_remote_state ();
10233 endbuf = rs->buf + get_remote_packet_size ();
10238 addr = (ULONGEST) remote_address_masked (addr);
10239 p += hexnumstr (p, addr);
10240 xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
10242 if (supports_evaluation_of_breakpoint_conditions ())
10243 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
10245 if (can_run_breakpoint_commands ())
10246 remote_add_target_side_commands (gdbarch, bp_tgt, p);
10249 getpkt (&rs->buf, &rs->buf_size, 0);
10251 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0]))
10257 case PACKET_UNKNOWN:
10262 /* If this breakpoint has target-side commands but this stub doesn't
10263 support Z0 packets, throw error. */
10264 if (!bp_tgt->tcommands.empty ())
10265 throw_error (NOT_SUPPORTED_ERROR, _("\
10266 Target doesn't support breakpoints that have target side commands."));
10268 return memory_insert_breakpoint (this, gdbarch, bp_tgt);
10272 remote_target::remove_breakpoint (struct gdbarch *gdbarch,
10273 struct bp_target_info *bp_tgt,
10274 enum remove_bp_reason reason)
10276 CORE_ADDR addr = bp_tgt->placed_address;
10277 struct remote_state *rs = get_remote_state ();
10279 if (packet_support (PACKET_Z0) != PACKET_DISABLE)
10282 char *endbuf = rs->buf + get_remote_packet_size ();
10284 /* Make sure the remote is pointing at the right process, if
10286 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10287 set_general_process ();
10293 addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
10294 p += hexnumstr (p, addr);
10295 xsnprintf (p, endbuf - p, ",%d", bp_tgt->kind);
10298 getpkt (&rs->buf, &rs->buf_size, 0);
10300 return (rs->buf[0] == 'E');
10303 return memory_remove_breakpoint (this, gdbarch, bp_tgt, reason);
10306 static enum Z_packet_type
10307 watchpoint_to_Z_packet (int type)
10312 return Z_PACKET_WRITE_WP;
10315 return Z_PACKET_READ_WP;
10318 return Z_PACKET_ACCESS_WP;
10321 internal_error (__FILE__, __LINE__,
10322 _("hw_bp_to_z: bad watchpoint type %d"), type);
10327 remote_target::insert_watchpoint (CORE_ADDR addr, int len,
10328 enum target_hw_bp_type type, struct expression *cond)
10330 struct remote_state *rs = get_remote_state ();
10331 char *endbuf = rs->buf + get_remote_packet_size ();
10333 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
10335 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
10338 /* Make sure the remote is pointing at the right process, if
10340 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10341 set_general_process ();
10343 xsnprintf (rs->buf, endbuf - rs->buf, "Z%x,", packet);
10344 p = strchr (rs->buf, '\0');
10345 addr = remote_address_masked (addr);
10346 p += hexnumstr (p, (ULONGEST) addr);
10347 xsnprintf (p, endbuf - p, ",%x", len);
10350 getpkt (&rs->buf, &rs->buf_size, 0);
10352 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
10356 case PACKET_UNKNOWN:
10361 internal_error (__FILE__, __LINE__,
10362 _("remote_insert_watchpoint: reached end of function"));
10366 remote_target::watchpoint_addr_within_range (CORE_ADDR addr,
10367 CORE_ADDR start, int length)
10369 CORE_ADDR diff = remote_address_masked (addr - start);
10371 return diff < length;
10376 remote_target::remove_watchpoint (CORE_ADDR addr, int len,
10377 enum target_hw_bp_type type, struct expression *cond)
10379 struct remote_state *rs = get_remote_state ();
10380 char *endbuf = rs->buf + get_remote_packet_size ();
10382 enum Z_packet_type packet = watchpoint_to_Z_packet (type);
10384 if (packet_support (PACKET_Z0 + packet) == PACKET_DISABLE)
10387 /* Make sure the remote is pointing at the right process, if
10389 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10390 set_general_process ();
10392 xsnprintf (rs->buf, endbuf - rs->buf, "z%x,", packet);
10393 p = strchr (rs->buf, '\0');
10394 addr = remote_address_masked (addr);
10395 p += hexnumstr (p, (ULONGEST) addr);
10396 xsnprintf (p, endbuf - p, ",%x", len);
10398 getpkt (&rs->buf, &rs->buf_size, 0);
10400 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z0 + packet]))
10403 case PACKET_UNKNOWN:
10408 internal_error (__FILE__, __LINE__,
10409 _("remote_remove_watchpoint: reached end of function"));
10413 int remote_hw_watchpoint_limit = -1;
10414 int remote_hw_watchpoint_length_limit = -1;
10415 int remote_hw_breakpoint_limit = -1;
10418 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr, int len)
10420 if (remote_hw_watchpoint_length_limit == 0)
10422 else if (remote_hw_watchpoint_length_limit < 0)
10424 else if (len <= remote_hw_watchpoint_length_limit)
10431 remote_target::can_use_hw_breakpoint (enum bptype type, int cnt, int ot)
10433 if (type == bp_hardware_breakpoint)
10435 if (remote_hw_breakpoint_limit == 0)
10437 else if (remote_hw_breakpoint_limit < 0)
10439 else if (cnt <= remote_hw_breakpoint_limit)
10444 if (remote_hw_watchpoint_limit == 0)
10446 else if (remote_hw_watchpoint_limit < 0)
10450 else if (cnt <= remote_hw_watchpoint_limit)
10456 /* The to_stopped_by_sw_breakpoint method of target remote. */
10459 remote_target::stopped_by_sw_breakpoint ()
10461 struct thread_info *thread = inferior_thread ();
10463 return (thread->priv != NULL
10464 && (get_remote_thread_info (thread)->stop_reason
10465 == TARGET_STOPPED_BY_SW_BREAKPOINT));
10468 /* The to_supports_stopped_by_sw_breakpoint method of target
10472 remote_target::supports_stopped_by_sw_breakpoint ()
10474 return (packet_support (PACKET_swbreak_feature) == PACKET_ENABLE);
10477 /* The to_stopped_by_hw_breakpoint method of target remote. */
10480 remote_target::stopped_by_hw_breakpoint ()
10482 struct thread_info *thread = inferior_thread ();
10484 return (thread->priv != NULL
10485 && (get_remote_thread_info (thread)->stop_reason
10486 == TARGET_STOPPED_BY_HW_BREAKPOINT));
10489 /* The to_supports_stopped_by_hw_breakpoint method of target
10493 remote_target::supports_stopped_by_hw_breakpoint ()
10495 return (packet_support (PACKET_hwbreak_feature) == PACKET_ENABLE);
10499 remote_target::stopped_by_watchpoint ()
10501 struct thread_info *thread = inferior_thread ();
10503 return (thread->priv != NULL
10504 && (get_remote_thread_info (thread)->stop_reason
10505 == TARGET_STOPPED_BY_WATCHPOINT));
10509 remote_target::stopped_data_address (CORE_ADDR *addr_p)
10511 struct thread_info *thread = inferior_thread ();
10513 if (thread->priv != NULL
10514 && (get_remote_thread_info (thread)->stop_reason
10515 == TARGET_STOPPED_BY_WATCHPOINT))
10517 *addr_p = get_remote_thread_info (thread)->watch_data_address;
10526 remote_target::insert_hw_breakpoint (struct gdbarch *gdbarch,
10527 struct bp_target_info *bp_tgt)
10529 CORE_ADDR addr = bp_tgt->reqstd_address;
10530 struct remote_state *rs;
10534 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
10537 /* Make sure the remote is pointing at the right process, if
10539 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10540 set_general_process ();
10542 rs = get_remote_state ();
10544 endbuf = rs->buf + get_remote_packet_size ();
10550 addr = remote_address_masked (addr);
10551 p += hexnumstr (p, (ULONGEST) addr);
10552 xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
10554 if (supports_evaluation_of_breakpoint_conditions ())
10555 remote_add_target_side_condition (gdbarch, bp_tgt, p, endbuf);
10557 if (can_run_breakpoint_commands ())
10558 remote_add_target_side_commands (gdbarch, bp_tgt, p);
10561 getpkt (&rs->buf, &rs->buf_size, 0);
10563 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
10566 if (rs->buf[1] == '.')
10568 message = strchr (rs->buf + 2, '.');
10570 error (_("Remote failure reply: %s"), message + 1);
10573 case PACKET_UNKNOWN:
10578 internal_error (__FILE__, __LINE__,
10579 _("remote_insert_hw_breakpoint: reached end of function"));
10584 remote_target::remove_hw_breakpoint (struct gdbarch *gdbarch,
10585 struct bp_target_info *bp_tgt)
10588 struct remote_state *rs = get_remote_state ();
10590 char *endbuf = rs->buf + get_remote_packet_size ();
10592 if (packet_support (PACKET_Z1) == PACKET_DISABLE)
10595 /* Make sure the remote is pointing at the right process, if
10597 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10598 set_general_process ();
10604 addr = remote_address_masked (bp_tgt->placed_address);
10605 p += hexnumstr (p, (ULONGEST) addr);
10606 xsnprintf (p, endbuf - p, ",%x", bp_tgt->kind);
10609 getpkt (&rs->buf, &rs->buf_size, 0);
10611 switch (packet_ok (rs->buf, &remote_protocol_packets[PACKET_Z1]))
10614 case PACKET_UNKNOWN:
10619 internal_error (__FILE__, __LINE__,
10620 _("remote_remove_hw_breakpoint: reached end of function"));
10623 /* Verify memory using the "qCRC:" request. */
10626 remote_target::verify_memory (const gdb_byte *data, CORE_ADDR lma, ULONGEST size)
10628 struct remote_state *rs = get_remote_state ();
10629 unsigned long host_crc, target_crc;
10632 /* It doesn't make sense to use qCRC if the remote target is
10633 connected but not running. */
10634 if (target_has_execution && packet_support (PACKET_qCRC) != PACKET_DISABLE)
10636 enum packet_result result;
10638 /* Make sure the remote is pointing at the right process. */
10639 set_general_process ();
10641 /* FIXME: assumes lma can fit into long. */
10642 xsnprintf (rs->buf, get_remote_packet_size (), "qCRC:%lx,%lx",
10643 (long) lma, (long) size);
10646 /* Be clever; compute the host_crc before waiting for target
10648 host_crc = xcrc32 (data, size, 0xffffffff);
10650 getpkt (&rs->buf, &rs->buf_size, 0);
10652 result = packet_ok (rs->buf,
10653 &remote_protocol_packets[PACKET_qCRC]);
10654 if (result == PACKET_ERROR)
10656 else if (result == PACKET_OK)
10658 for (target_crc = 0, tmp = &rs->buf[1]; *tmp; tmp++)
10659 target_crc = target_crc * 16 + fromhex (*tmp);
10661 return (host_crc == target_crc);
10665 return simple_verify_memory (this, data, lma, size);
10668 /* compare-sections command
10670 With no arguments, compares each loadable section in the exec bfd
10671 with the same memory range on the target, and reports mismatches.
10672 Useful for verifying the image on the target against the exec file. */
10675 compare_sections_command (const char *args, int from_tty)
10678 const char *sectname;
10679 bfd_size_type size;
10682 int mismatched = 0;
10687 error (_("command cannot be used without an exec file"));
10689 if (args != NULL && strcmp (args, "-r") == 0)
10695 for (s = exec_bfd->sections; s; s = s->next)
10697 if (!(s->flags & SEC_LOAD))
10698 continue; /* Skip non-loadable section. */
10700 if (read_only && (s->flags & SEC_READONLY) == 0)
10701 continue; /* Skip writeable sections */
10703 size = bfd_get_section_size (s);
10705 continue; /* Skip zero-length section. */
10707 sectname = bfd_get_section_name (exec_bfd, s);
10708 if (args && strcmp (args, sectname) != 0)
10709 continue; /* Not the section selected by user. */
10711 matched = 1; /* Do this section. */
10714 gdb::byte_vector sectdata (size);
10715 bfd_get_section_contents (exec_bfd, s, sectdata.data (), 0, size);
10717 res = target_verify_memory (sectdata.data (), lma, size);
10720 error (_("target memory fault, section %s, range %s -- %s"), sectname,
10721 paddress (target_gdbarch (), lma),
10722 paddress (target_gdbarch (), lma + size));
10724 printf_filtered ("Section %s, range %s -- %s: ", sectname,
10725 paddress (target_gdbarch (), lma),
10726 paddress (target_gdbarch (), lma + size));
10728 printf_filtered ("matched.\n");
10731 printf_filtered ("MIS-MATCHED!\n");
10735 if (mismatched > 0)
10736 warning (_("One or more sections of the target image does not match\n\
10737 the loaded file\n"));
10738 if (args && !matched)
10739 printf_filtered (_("No loaded section named '%s'.\n"), args);
10742 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10743 into remote target. The number of bytes written to the remote
10744 target is returned, or -1 for error. */
10747 remote_target::remote_write_qxfer (const char *object_name,
10748 const char *annex, const gdb_byte *writebuf,
10749 ULONGEST offset, LONGEST len,
10750 ULONGEST *xfered_len,
10751 struct packet_config *packet)
10755 struct remote_state *rs = get_remote_state ();
10756 int max_size = get_memory_write_packet_size ();
10758 if (packet_config_support (packet) == PACKET_DISABLE)
10759 return TARGET_XFER_E_IO;
10761 /* Insert header. */
10762 i = snprintf (rs->buf, max_size,
10763 "qXfer:%s:write:%s:%s:",
10764 object_name, annex ? annex : "",
10765 phex_nz (offset, sizeof offset));
10766 max_size -= (i + 1);
10768 /* Escape as much data as fits into rs->buf. */
10769 buf_len = remote_escape_output
10770 (writebuf, len, 1, (gdb_byte *) rs->buf + i, &max_size, max_size);
10772 if (putpkt_binary (rs->buf, i + buf_len) < 0
10773 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
10774 || packet_ok (rs->buf, packet) != PACKET_OK)
10775 return TARGET_XFER_E_IO;
10777 unpack_varlen_hex (rs->buf, &n);
10780 return (*xfered_len != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
10783 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10784 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10785 number of bytes read is returned, or 0 for EOF, or -1 for error.
10786 The number of bytes read may be less than LEN without indicating an
10787 EOF. PACKET is checked and updated to indicate whether the remote
10788 target supports this object. */
10791 remote_target::remote_read_qxfer (const char *object_name,
10793 gdb_byte *readbuf, ULONGEST offset,
10795 ULONGEST *xfered_len,
10796 struct packet_config *packet)
10798 struct remote_state *rs = get_remote_state ();
10799 LONGEST i, n, packet_len;
10801 if (packet_config_support (packet) == PACKET_DISABLE)
10802 return TARGET_XFER_E_IO;
10804 /* Check whether we've cached an end-of-object packet that matches
10806 if (rs->finished_object)
10808 if (strcmp (object_name, rs->finished_object) == 0
10809 && strcmp (annex ? annex : "", rs->finished_annex) == 0
10810 && offset == rs->finished_offset)
10811 return TARGET_XFER_EOF;
10814 /* Otherwise, we're now reading something different. Discard
10816 xfree (rs->finished_object);
10817 xfree (rs->finished_annex);
10818 rs->finished_object = NULL;
10819 rs->finished_annex = NULL;
10822 /* Request only enough to fit in a single packet. The actual data
10823 may not, since we don't know how much of it will need to be escaped;
10824 the target is free to respond with slightly less data. We subtract
10825 five to account for the response type and the protocol frame. */
10826 n = std::min<LONGEST> (get_remote_packet_size () - 5, len);
10827 snprintf (rs->buf, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10828 object_name, annex ? annex : "",
10829 phex_nz (offset, sizeof offset),
10830 phex_nz (n, sizeof n));
10831 i = putpkt (rs->buf);
10833 return TARGET_XFER_E_IO;
10836 packet_len = getpkt_sane (&rs->buf, &rs->buf_size, 0);
10837 if (packet_len < 0 || packet_ok (rs->buf, packet) != PACKET_OK)
10838 return TARGET_XFER_E_IO;
10840 if (rs->buf[0] != 'l' && rs->buf[0] != 'm')
10841 error (_("Unknown remote qXfer reply: %s"), rs->buf);
10843 /* 'm' means there is (or at least might be) more data after this
10844 batch. That does not make sense unless there's at least one byte
10845 of data in this reply. */
10846 if (rs->buf[0] == 'm' && packet_len == 1)
10847 error (_("Remote qXfer reply contained no data."));
10849 /* Got some data. */
10850 i = remote_unescape_input ((gdb_byte *) rs->buf + 1,
10851 packet_len - 1, readbuf, n);
10853 /* 'l' is an EOF marker, possibly including a final block of data,
10854 or possibly empty. If we have the final block of a non-empty
10855 object, record this fact to bypass a subsequent partial read. */
10856 if (rs->buf[0] == 'l' && offset + i > 0)
10858 rs->finished_object = xstrdup (object_name);
10859 rs->finished_annex = xstrdup (annex ? annex : "");
10860 rs->finished_offset = offset + i;
10864 return TARGET_XFER_EOF;
10868 return TARGET_XFER_OK;
10872 enum target_xfer_status
10873 remote_target::xfer_partial (enum target_object object,
10874 const char *annex, gdb_byte *readbuf,
10875 const gdb_byte *writebuf, ULONGEST offset, ULONGEST len,
10876 ULONGEST *xfered_len)
10878 struct remote_state *rs;
10882 int unit_size = gdbarch_addressable_memory_unit_size (target_gdbarch ());
10884 set_remote_traceframe ();
10885 set_general_thread (inferior_ptid);
10887 rs = get_remote_state ();
10889 /* Handle memory using the standard memory routines. */
10890 if (object == TARGET_OBJECT_MEMORY)
10892 /* If the remote target is connected but not running, we should
10893 pass this request down to a lower stratum (e.g. the executable
10895 if (!target_has_execution)
10896 return TARGET_XFER_EOF;
10898 if (writebuf != NULL)
10899 return remote_write_bytes (offset, writebuf, len, unit_size,
10902 return remote_read_bytes (offset, readbuf, len, unit_size,
10906 /* Handle SPU memory using qxfer packets. */
10907 if (object == TARGET_OBJECT_SPU)
10910 return remote_read_qxfer ("spu", annex, readbuf, offset, len,
10911 xfered_len, &remote_protocol_packets
10912 [PACKET_qXfer_spu_read]);
10914 return remote_write_qxfer ("spu", annex, writebuf, offset, len,
10915 xfered_len, &remote_protocol_packets
10916 [PACKET_qXfer_spu_write]);
10919 /* Handle extra signal info using qxfer packets. */
10920 if (object == TARGET_OBJECT_SIGNAL_INFO)
10923 return remote_read_qxfer ("siginfo", annex, readbuf, offset, len,
10924 xfered_len, &remote_protocol_packets
10925 [PACKET_qXfer_siginfo_read]);
10927 return remote_write_qxfer ("siginfo", annex,
10928 writebuf, offset, len, xfered_len,
10929 &remote_protocol_packets
10930 [PACKET_qXfer_siginfo_write]);
10933 if (object == TARGET_OBJECT_STATIC_TRACE_DATA)
10936 return remote_read_qxfer ("statictrace", annex,
10937 readbuf, offset, len, xfered_len,
10938 &remote_protocol_packets
10939 [PACKET_qXfer_statictrace_read]);
10941 return TARGET_XFER_E_IO;
10944 /* Only handle flash writes. */
10945 if (writebuf != NULL)
10949 case TARGET_OBJECT_FLASH:
10950 return remote_flash_write (offset, len, xfered_len,
10954 return TARGET_XFER_E_IO;
10958 /* Map pre-existing objects onto letters. DO NOT do this for new
10959 objects!!! Instead specify new query packets. */
10962 case TARGET_OBJECT_AVR:
10966 case TARGET_OBJECT_AUXV:
10967 gdb_assert (annex == NULL);
10968 return remote_read_qxfer ("auxv", annex, readbuf, offset, len,
10970 &remote_protocol_packets[PACKET_qXfer_auxv]);
10972 case TARGET_OBJECT_AVAILABLE_FEATURES:
10973 return remote_read_qxfer
10974 ("features", annex, readbuf, offset, len, xfered_len,
10975 &remote_protocol_packets[PACKET_qXfer_features]);
10977 case TARGET_OBJECT_LIBRARIES:
10978 return remote_read_qxfer
10979 ("libraries", annex, readbuf, offset, len, xfered_len,
10980 &remote_protocol_packets[PACKET_qXfer_libraries]);
10982 case TARGET_OBJECT_LIBRARIES_SVR4:
10983 return remote_read_qxfer
10984 ("libraries-svr4", annex, readbuf, offset, len, xfered_len,
10985 &remote_protocol_packets[PACKET_qXfer_libraries_svr4]);
10987 case TARGET_OBJECT_MEMORY_MAP:
10988 gdb_assert (annex == NULL);
10989 return remote_read_qxfer ("memory-map", annex, readbuf, offset, len,
10991 &remote_protocol_packets[PACKET_qXfer_memory_map]);
10993 case TARGET_OBJECT_OSDATA:
10994 /* Should only get here if we're connected. */
10995 gdb_assert (rs->remote_desc);
10996 return remote_read_qxfer
10997 ("osdata", annex, readbuf, offset, len, xfered_len,
10998 &remote_protocol_packets[PACKET_qXfer_osdata]);
11000 case TARGET_OBJECT_THREADS:
11001 gdb_assert (annex == NULL);
11002 return remote_read_qxfer ("threads", annex, readbuf, offset, len,
11004 &remote_protocol_packets[PACKET_qXfer_threads]);
11006 case TARGET_OBJECT_TRACEFRAME_INFO:
11007 gdb_assert (annex == NULL);
11008 return remote_read_qxfer
11009 ("traceframe-info", annex, readbuf, offset, len, xfered_len,
11010 &remote_protocol_packets[PACKET_qXfer_traceframe_info]);
11012 case TARGET_OBJECT_FDPIC:
11013 return remote_read_qxfer ("fdpic", annex, readbuf, offset, len,
11015 &remote_protocol_packets[PACKET_qXfer_fdpic]);
11017 case TARGET_OBJECT_OPENVMS_UIB:
11018 return remote_read_qxfer ("uib", annex, readbuf, offset, len,
11020 &remote_protocol_packets[PACKET_qXfer_uib]);
11022 case TARGET_OBJECT_BTRACE:
11023 return remote_read_qxfer ("btrace", annex, readbuf, offset, len,
11025 &remote_protocol_packets[PACKET_qXfer_btrace]);
11027 case TARGET_OBJECT_BTRACE_CONF:
11028 return remote_read_qxfer ("btrace-conf", annex, readbuf, offset,
11030 &remote_protocol_packets[PACKET_qXfer_btrace_conf]);
11032 case TARGET_OBJECT_EXEC_FILE:
11033 return remote_read_qxfer ("exec-file", annex, readbuf, offset,
11035 &remote_protocol_packets[PACKET_qXfer_exec_file]);
11038 return TARGET_XFER_E_IO;
11041 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11042 large enough let the caller deal with it. */
11043 if (len < get_remote_packet_size ())
11044 return TARGET_XFER_E_IO;
11045 len = get_remote_packet_size ();
11047 /* Except for querying the minimum buffer size, target must be open. */
11048 if (!rs->remote_desc)
11049 error (_("remote query is only available after target open"));
11051 gdb_assert (annex != NULL);
11052 gdb_assert (readbuf != NULL);
11056 *p2++ = query_type;
11058 /* We used one buffer char for the remote protocol q command and
11059 another for the query type. As the remote protocol encapsulation
11060 uses 4 chars plus one extra in case we are debugging
11061 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11064 while (annex[i] && (i < (get_remote_packet_size () - 8)))
11066 /* Bad caller may have sent forbidden characters. */
11067 gdb_assert (isprint (annex[i]) && annex[i] != '$' && annex[i] != '#');
11072 gdb_assert (annex[i] == '\0');
11074 i = putpkt (rs->buf);
11076 return TARGET_XFER_E_IO;
11078 getpkt (&rs->buf, &rs->buf_size, 0);
11079 strcpy ((char *) readbuf, rs->buf);
11081 *xfered_len = strlen ((char *) readbuf);
11082 return (*xfered_len != 0) ? TARGET_XFER_OK : TARGET_XFER_EOF;
11085 /* Implementation of to_get_memory_xfer_limit. */
11088 remote_target::get_memory_xfer_limit ()
11090 return get_memory_write_packet_size ();
11094 remote_target::search_memory (CORE_ADDR start_addr, ULONGEST search_space_len,
11095 const gdb_byte *pattern, ULONGEST pattern_len,
11096 CORE_ADDR *found_addrp)
11098 int addr_size = gdbarch_addr_bit (target_gdbarch ()) / 8;
11099 struct remote_state *rs = get_remote_state ();
11100 int max_size = get_memory_write_packet_size ();
11101 struct packet_config *packet =
11102 &remote_protocol_packets[PACKET_qSearch_memory];
11103 /* Number of packet bytes used to encode the pattern;
11104 this could be more than PATTERN_LEN due to escape characters. */
11105 int escaped_pattern_len;
11106 /* Amount of pattern that was encodable in the packet. */
11107 int used_pattern_len;
11110 ULONGEST found_addr;
11112 /* Don't go to the target if we don't have to. This is done before
11113 checking packet_config_support to avoid the possibility that a
11114 success for this edge case means the facility works in
11116 if (pattern_len > search_space_len)
11118 if (pattern_len == 0)
11120 *found_addrp = start_addr;
11124 /* If we already know the packet isn't supported, fall back to the simple
11125 way of searching memory. */
11127 if (packet_config_support (packet) == PACKET_DISABLE)
11129 /* Target doesn't provided special support, fall back and use the
11130 standard support (copy memory and do the search here). */
11131 return simple_search_memory (this, start_addr, search_space_len,
11132 pattern, pattern_len, found_addrp);
11135 /* Make sure the remote is pointing at the right process. */
11136 set_general_process ();
11138 /* Insert header. */
11139 i = snprintf (rs->buf, max_size,
11140 "qSearch:memory:%s;%s;",
11141 phex_nz (start_addr, addr_size),
11142 phex_nz (search_space_len, sizeof (search_space_len)));
11143 max_size -= (i + 1);
11145 /* Escape as much data as fits into rs->buf. */
11146 escaped_pattern_len =
11147 remote_escape_output (pattern, pattern_len, 1, (gdb_byte *) rs->buf + i,
11148 &used_pattern_len, max_size);
11150 /* Bail if the pattern is too large. */
11151 if (used_pattern_len != pattern_len)
11152 error (_("Pattern is too large to transmit to remote target."));
11154 if (putpkt_binary (rs->buf, i + escaped_pattern_len) < 0
11155 || getpkt_sane (&rs->buf, &rs->buf_size, 0) < 0
11156 || packet_ok (rs->buf, packet) != PACKET_OK)
11158 /* The request may not have worked because the command is not
11159 supported. If so, fall back to the simple way. */
11160 if (packet_config_support (packet) == PACKET_DISABLE)
11162 return simple_search_memory (this, start_addr, search_space_len,
11163 pattern, pattern_len, found_addrp);
11168 if (rs->buf[0] == '0')
11170 else if (rs->buf[0] == '1')
11173 if (rs->buf[1] != ',')
11174 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
11175 unpack_varlen_hex (rs->buf + 2, &found_addr);
11176 *found_addrp = found_addr;
11179 error (_("Unknown qSearch:memory reply: %s"), rs->buf);
11185 remote_target::rcmd (const char *command, struct ui_file *outbuf)
11187 struct remote_state *rs = get_remote_state ();
11190 if (!rs->remote_desc)
11191 error (_("remote rcmd is only available after target open"));
11193 /* Send a NULL command across as an empty command. */
11194 if (command == NULL)
11197 /* The query prefix. */
11198 strcpy (rs->buf, "qRcmd,");
11199 p = strchr (rs->buf, '\0');
11201 if ((strlen (rs->buf) + strlen (command) * 2 + 8/*misc*/)
11202 > get_remote_packet_size ())
11203 error (_("\"monitor\" command ``%s'' is too long."), command);
11205 /* Encode the actual command. */
11206 bin2hex ((const gdb_byte *) command, p, strlen (command));
11208 if (putpkt (rs->buf) < 0)
11209 error (_("Communication problem with target."));
11211 /* get/display the response */
11216 /* XXX - see also remote_get_noisy_reply(). */
11217 QUIT; /* Allow user to bail out with ^C. */
11219 if (getpkt_sane (&rs->buf, &rs->buf_size, 0) == -1)
11221 /* Timeout. Continue to (try to) read responses.
11222 This is better than stopping with an error, assuming the stub
11223 is still executing the (long) monitor command.
11224 If needed, the user can interrupt gdb using C-c, obtaining
11225 an effect similar to stop on timeout. */
11229 if (buf[0] == '\0')
11230 error (_("Target does not support this command."));
11231 if (buf[0] == 'O' && buf[1] != 'K')
11233 remote_console_output (buf + 1); /* 'O' message from stub. */
11236 if (strcmp (buf, "OK") == 0)
11238 if (strlen (buf) == 3 && buf[0] == 'E'
11239 && isdigit (buf[1]) && isdigit (buf[2]))
11241 error (_("Protocol error with Rcmd"));
11243 for (p = buf; p[0] != '\0' && p[1] != '\0'; p += 2)
11245 char c = (fromhex (p[0]) << 4) + fromhex (p[1]);
11247 fputc_unfiltered (c, outbuf);
11253 std::vector<mem_region>
11254 remote_target::memory_map ()
11256 std::vector<mem_region> result;
11257 gdb::optional<gdb::char_vector> text
11258 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP, NULL);
11261 result = parse_memory_map (text->data ());
11267 packet_command (const char *args, int from_tty)
11269 remote_target *remote = get_current_remote_target ();
11271 if (remote == nullptr)
11272 error (_("command can only be used with remote target"));
11274 remote->packet_command (args, from_tty);
11278 remote_target::packet_command (const char *args, int from_tty)
11281 error (_("remote-packet command requires packet text as argument"));
11283 puts_filtered ("sending: ");
11284 print_packet (args);
11285 puts_filtered ("\n");
11288 remote_state *rs = get_remote_state ();
11290 getpkt (&rs->buf, &rs->buf_size, 0);
11291 puts_filtered ("received: ");
11292 print_packet (rs->buf);
11293 puts_filtered ("\n");
11297 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11299 static void display_thread_info (struct gdb_ext_thread_info *info);
11301 static void threadset_test_cmd (char *cmd, int tty);
11303 static void threadalive_test (char *cmd, int tty);
11305 static void threadlist_test_cmd (char *cmd, int tty);
11307 int get_and_display_threadinfo (threadref *ref);
11309 static void threadinfo_test_cmd (char *cmd, int tty);
11311 static int thread_display_step (threadref *ref, void *context);
11313 static void threadlist_update_test_cmd (char *cmd, int tty);
11315 static void init_remote_threadtests (void);
11317 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11320 threadset_test_cmd (const char *cmd, int tty)
11322 int sample_thread = SAMPLE_THREAD;
11324 printf_filtered (_("Remote threadset test\n"));
11325 set_general_thread (sample_thread);
11330 threadalive_test (const char *cmd, int tty)
11332 int sample_thread = SAMPLE_THREAD;
11333 int pid = inferior_ptid.pid ();
11334 ptid_t ptid = ptid_t (pid, sample_thread, 0);
11336 if (remote_thread_alive (ptid))
11337 printf_filtered ("PASS: Thread alive test\n");
11339 printf_filtered ("FAIL: Thread alive test\n");
11342 void output_threadid (char *title, threadref *ref);
11345 output_threadid (char *title, threadref *ref)
11349 pack_threadid (&hexid[0], ref); /* Convert threead id into hex. */
11351 printf_filtered ("%s %s\n", title, (&hexid[0]));
11355 threadlist_test_cmd (const char *cmd, int tty)
11358 threadref nextthread;
11359 int done, result_count;
11360 threadref threadlist[3];
11362 printf_filtered ("Remote Threadlist test\n");
11363 if (!remote_get_threadlist (startflag, &nextthread, 3, &done,
11364 &result_count, &threadlist[0]))
11365 printf_filtered ("FAIL: threadlist test\n");
11368 threadref *scan = threadlist;
11369 threadref *limit = scan + result_count;
11371 while (scan < limit)
11372 output_threadid (" thread ", scan++);
11377 display_thread_info (struct gdb_ext_thread_info *info)
11379 output_threadid ("Threadid: ", &info->threadid);
11380 printf_filtered ("Name: %s\n ", info->shortname);
11381 printf_filtered ("State: %s\n", info->display);
11382 printf_filtered ("other: %s\n\n", info->more_display);
11386 get_and_display_threadinfo (threadref *ref)
11390 struct gdb_ext_thread_info threadinfo;
11392 set = TAG_THREADID | TAG_EXISTS | TAG_THREADNAME
11393 | TAG_MOREDISPLAY | TAG_DISPLAY;
11394 if (0 != (result = remote_get_threadinfo (ref, set, &threadinfo)))
11395 display_thread_info (&threadinfo);
11400 threadinfo_test_cmd (const char *cmd, int tty)
11402 int athread = SAMPLE_THREAD;
11406 int_to_threadref (&thread, athread);
11407 printf_filtered ("Remote Threadinfo test\n");
11408 if (!get_and_display_threadinfo (&thread))
11409 printf_filtered ("FAIL cannot get thread info\n");
11413 thread_display_step (threadref *ref, void *context)
11415 /* output_threadid(" threadstep ",ref); *//* simple test */
11416 return get_and_display_threadinfo (ref);
11420 threadlist_update_test_cmd (const char *cmd, int tty)
11422 printf_filtered ("Remote Threadlist update test\n");
11423 remote_threadlist_iterator (thread_display_step, 0, CRAZY_MAX_THREADS);
11427 init_remote_threadtests (void)
11429 add_com ("tlist", class_obscure, threadlist_test_cmd,
11430 _("Fetch and print the remote list of "
11431 "thread identifiers, one pkt only"));
11432 add_com ("tinfo", class_obscure, threadinfo_test_cmd,
11433 _("Fetch and display info about one thread"));
11434 add_com ("tset", class_obscure, threadset_test_cmd,
11435 _("Test setting to a different thread"));
11436 add_com ("tupd", class_obscure, threadlist_update_test_cmd,
11437 _("Iterate through updating all remote thread info"));
11438 add_com ("talive", class_obscure, threadalive_test,
11439 _(" Remote thread alive test "));
11444 /* Convert a thread ID to a string. Returns the string in a static
11448 remote_target::pid_to_str (ptid_t ptid)
11450 static char buf[64];
11451 struct remote_state *rs = get_remote_state ();
11453 if (ptid == null_ptid)
11454 return normal_pid_to_str (ptid);
11455 else if (ptid.is_pid ())
11457 /* Printing an inferior target id. */
11459 /* When multi-process extensions are off, there's no way in the
11460 remote protocol to know the remote process id, if there's any
11461 at all. There's one exception --- when we're connected with
11462 target extended-remote, and we manually attached to a process
11463 with "attach PID". We don't record anywhere a flag that
11464 allows us to distinguish that case from the case of
11465 connecting with extended-remote and the stub already being
11466 attached to a process, and reporting yes to qAttached, hence
11467 no smart special casing here. */
11468 if (!remote_multi_process_p (rs))
11470 xsnprintf (buf, sizeof buf, "Remote target");
11474 return normal_pid_to_str (ptid);
11478 if (magic_null_ptid == ptid)
11479 xsnprintf (buf, sizeof buf, "Thread <main>");
11480 else if (remote_multi_process_p (rs))
11481 if (ptid.lwp () == 0)
11482 return normal_pid_to_str (ptid);
11484 xsnprintf (buf, sizeof buf, "Thread %d.%ld",
11485 ptid.pid (), ptid.lwp ());
11487 xsnprintf (buf, sizeof buf, "Thread %ld",
11493 /* Get the address of the thread local variable in OBJFILE which is
11494 stored at OFFSET within the thread local storage for thread PTID. */
11497 remote_target::get_thread_local_address (ptid_t ptid, CORE_ADDR lm,
11500 if (packet_support (PACKET_qGetTLSAddr) != PACKET_DISABLE)
11502 struct remote_state *rs = get_remote_state ();
11504 char *endp = rs->buf + get_remote_packet_size ();
11505 enum packet_result result;
11507 strcpy (p, "qGetTLSAddr:");
11509 p = write_ptid (p, endp, ptid);
11511 p += hexnumstr (p, offset);
11513 p += hexnumstr (p, lm);
11517 getpkt (&rs->buf, &rs->buf_size, 0);
11518 result = packet_ok (rs->buf,
11519 &remote_protocol_packets[PACKET_qGetTLSAddr]);
11520 if (result == PACKET_OK)
11524 unpack_varlen_hex (rs->buf, &addr);
11527 else if (result == PACKET_UNKNOWN)
11528 throw_error (TLS_GENERIC_ERROR,
11529 _("Remote target doesn't support qGetTLSAddr packet"));
11531 throw_error (TLS_GENERIC_ERROR,
11532 _("Remote target failed to process qGetTLSAddr request"));
11535 throw_error (TLS_GENERIC_ERROR,
11536 _("TLS not supported or disabled on this target"));
11541 /* Provide thread local base, i.e. Thread Information Block address.
11542 Returns 1 if ptid is found and thread_local_base is non zero. */
11545 remote_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr)
11547 if (packet_support (PACKET_qGetTIBAddr) != PACKET_DISABLE)
11549 struct remote_state *rs = get_remote_state ();
11551 char *endp = rs->buf + get_remote_packet_size ();
11552 enum packet_result result;
11554 strcpy (p, "qGetTIBAddr:");
11556 p = write_ptid (p, endp, ptid);
11560 getpkt (&rs->buf, &rs->buf_size, 0);
11561 result = packet_ok (rs->buf,
11562 &remote_protocol_packets[PACKET_qGetTIBAddr]);
11563 if (result == PACKET_OK)
11566 unpack_varlen_hex (rs->buf, &val);
11568 *addr = (CORE_ADDR) val;
11571 else if (result == PACKET_UNKNOWN)
11572 error (_("Remote target doesn't support qGetTIBAddr packet"));
11574 error (_("Remote target failed to process qGetTIBAddr request"));
11577 error (_("qGetTIBAddr not supported or disabled on this target"));
11582 /* Support for inferring a target description based on the current
11583 architecture and the size of a 'g' packet. While the 'g' packet
11584 can have any size (since optional registers can be left off the
11585 end), some sizes are easily recognizable given knowledge of the
11586 approximate architecture. */
11588 struct remote_g_packet_guess
11590 remote_g_packet_guess (int bytes_, const struct target_desc *tdesc_)
11597 const struct target_desc *tdesc;
11600 struct remote_g_packet_data : public allocate_on_obstack
11602 std::vector<remote_g_packet_guess> guesses;
11605 static struct gdbarch_data *remote_g_packet_data_handle;
11608 remote_g_packet_data_init (struct obstack *obstack)
11610 return new (obstack) remote_g_packet_data;
11614 register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
11615 const struct target_desc *tdesc)
11617 struct remote_g_packet_data *data
11618 = ((struct remote_g_packet_data *)
11619 gdbarch_data (gdbarch, remote_g_packet_data_handle));
11621 gdb_assert (tdesc != NULL);
11623 for (const remote_g_packet_guess &guess : data->guesses)
11624 if (guess.bytes == bytes)
11625 internal_error (__FILE__, __LINE__,
11626 _("Duplicate g packet description added for size %d"),
11629 data->guesses.emplace_back (bytes, tdesc);
11632 /* Return true if remote_read_description would do anything on this target
11633 and architecture, false otherwise. */
11636 remote_read_description_p (struct target_ops *target)
11638 struct remote_g_packet_data *data
11639 = ((struct remote_g_packet_data *)
11640 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
11642 return !data->guesses.empty ();
11645 const struct target_desc *
11646 remote_target::read_description ()
11648 struct remote_g_packet_data *data
11649 = ((struct remote_g_packet_data *)
11650 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle));
11652 /* Do not try this during initial connection, when we do not know
11653 whether there is a running but stopped thread. */
11654 if (!target_has_execution || inferior_ptid == null_ptid)
11655 return beneath ()->read_description ();
11657 if (!data->guesses.empty ())
11659 int bytes = send_g_packet ();
11661 for (const remote_g_packet_guess &guess : data->guesses)
11662 if (guess.bytes == bytes)
11663 return guess.tdesc;
11665 /* We discard the g packet. A minor optimization would be to
11666 hold on to it, and fill the register cache once we have selected
11667 an architecture, but it's too tricky to do safely. */
11670 return beneath ()->read_description ();
11673 /* Remote file transfer support. This is host-initiated I/O, not
11674 target-initiated; for target-initiated, see remote-fileio.c. */
11676 /* If *LEFT is at least the length of STRING, copy STRING to
11677 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11678 decrease *LEFT. Otherwise raise an error. */
11681 remote_buffer_add_string (char **buffer, int *left, const char *string)
11683 int len = strlen (string);
11686 error (_("Packet too long for target."));
11688 memcpy (*buffer, string, len);
11692 /* NUL-terminate the buffer as a convenience, if there is
11698 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11699 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11700 decrease *LEFT. Otherwise raise an error. */
11703 remote_buffer_add_bytes (char **buffer, int *left, const gdb_byte *bytes,
11706 if (2 * len > *left)
11707 error (_("Packet too long for target."));
11709 bin2hex (bytes, *buffer, len);
11710 *buffer += 2 * len;
11713 /* NUL-terminate the buffer as a convenience, if there is
11719 /* If *LEFT is large enough, convert VALUE to hex and add it to
11720 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11721 decrease *LEFT. Otherwise raise an error. */
11724 remote_buffer_add_int (char **buffer, int *left, ULONGEST value)
11726 int len = hexnumlen (value);
11729 error (_("Packet too long for target."));
11731 hexnumstr (*buffer, value);
11735 /* NUL-terminate the buffer as a convenience, if there is
11741 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11742 value, *REMOTE_ERRNO to the remote error number or zero if none
11743 was included, and *ATTACHMENT to point to the start of the annex
11744 if any. The length of the packet isn't needed here; there may
11745 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11747 Return 0 if the packet could be parsed, -1 if it could not. If
11748 -1 is returned, the other variables may not be initialized. */
11751 remote_hostio_parse_result (char *buffer, int *retcode,
11752 int *remote_errno, char **attachment)
11757 *attachment = NULL;
11759 if (buffer[0] != 'F')
11763 *retcode = strtol (&buffer[1], &p, 16);
11764 if (errno != 0 || p == &buffer[1])
11767 /* Check for ",errno". */
11771 *remote_errno = strtol (p + 1, &p2, 16);
11772 if (errno != 0 || p + 1 == p2)
11777 /* Check for ";attachment". If there is no attachment, the
11778 packet should end here. */
11781 *attachment = p + 1;
11784 else if (*p == '\0')
11790 /* Send a prepared I/O packet to the target and read its response.
11791 The prepared packet is in the global RS->BUF before this function
11792 is called, and the answer is there when we return.
11794 COMMAND_BYTES is the length of the request to send, which may include
11795 binary data. WHICH_PACKET is the packet configuration to check
11796 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11797 is set to the error number and -1 is returned. Otherwise the value
11798 returned by the function is returned.
11800 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11801 attachment is expected; an error will be reported if there's a
11802 mismatch. If one is found, *ATTACHMENT will be set to point into
11803 the packet buffer and *ATTACHMENT_LEN will be set to the
11804 attachment's length. */
11807 remote_target::remote_hostio_send_command (int command_bytes, int which_packet,
11808 int *remote_errno, char **attachment,
11809 int *attachment_len)
11811 struct remote_state *rs = get_remote_state ();
11812 int ret, bytes_read;
11813 char *attachment_tmp;
11815 if (packet_support (which_packet) == PACKET_DISABLE)
11817 *remote_errno = FILEIO_ENOSYS;
11821 putpkt_binary (rs->buf, command_bytes);
11822 bytes_read = getpkt_sane (&rs->buf, &rs->buf_size, 0);
11824 /* If it timed out, something is wrong. Don't try to parse the
11826 if (bytes_read < 0)
11828 *remote_errno = FILEIO_EINVAL;
11832 switch (packet_ok (rs->buf, &remote_protocol_packets[which_packet]))
11835 *remote_errno = FILEIO_EINVAL;
11837 case PACKET_UNKNOWN:
11838 *remote_errno = FILEIO_ENOSYS;
11844 if (remote_hostio_parse_result (rs->buf, &ret, remote_errno,
11847 *remote_errno = FILEIO_EINVAL;
11851 /* Make sure we saw an attachment if and only if we expected one. */
11852 if ((attachment_tmp == NULL && attachment != NULL)
11853 || (attachment_tmp != NULL && attachment == NULL))
11855 *remote_errno = FILEIO_EINVAL;
11859 /* If an attachment was found, it must point into the packet buffer;
11860 work out how many bytes there were. */
11861 if (attachment_tmp != NULL)
11863 *attachment = attachment_tmp;
11864 *attachment_len = bytes_read - (*attachment - rs->buf);
11870 /* See declaration.h. */
11873 readahead_cache::invalidate ()
11878 /* See declaration.h. */
11881 readahead_cache::invalidate_fd (int fd)
11883 if (this->fd == fd)
11887 /* Set the filesystem remote_hostio functions that take FILENAME
11888 arguments will use. Return 0 on success, or -1 if an error
11889 occurs (and set *REMOTE_ERRNO). */
11892 remote_target::remote_hostio_set_filesystem (struct inferior *inf,
11895 struct remote_state *rs = get_remote_state ();
11896 int required_pid = (inf == NULL || inf->fake_pid_p) ? 0 : inf->pid;
11898 int left = get_remote_packet_size () - 1;
11902 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11905 if (rs->fs_pid != -1 && required_pid == rs->fs_pid)
11908 remote_buffer_add_string (&p, &left, "vFile:setfs:");
11910 xsnprintf (arg, sizeof (arg), "%x", required_pid);
11911 remote_buffer_add_string (&p, &left, arg);
11913 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_setfs,
11914 remote_errno, NULL, NULL);
11916 if (packet_support (PACKET_vFile_setfs) == PACKET_DISABLE)
11920 rs->fs_pid = required_pid;
11925 /* Implementation of to_fileio_open. */
11928 remote_target::remote_hostio_open (inferior *inf, const char *filename,
11929 int flags, int mode, int warn_if_slow,
11932 struct remote_state *rs = get_remote_state ();
11934 int left = get_remote_packet_size () - 1;
11938 static int warning_issued = 0;
11940 printf_unfiltered (_("Reading %s from remote target...\n"),
11943 if (!warning_issued)
11945 warning (_("File transfers from remote targets can be slow."
11946 " Use \"set sysroot\" to access files locally"
11948 warning_issued = 1;
11952 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
11955 remote_buffer_add_string (&p, &left, "vFile:open:");
11957 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
11958 strlen (filename));
11959 remote_buffer_add_string (&p, &left, ",");
11961 remote_buffer_add_int (&p, &left, flags);
11962 remote_buffer_add_string (&p, &left, ",");
11964 remote_buffer_add_int (&p, &left, mode);
11966 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_open,
11967 remote_errno, NULL, NULL);
11971 remote_target::fileio_open (struct inferior *inf, const char *filename,
11972 int flags, int mode, int warn_if_slow,
11975 return remote_hostio_open (inf, filename, flags, mode, warn_if_slow,
11979 /* Implementation of to_fileio_pwrite. */
11982 remote_target::remote_hostio_pwrite (int fd, const gdb_byte *write_buf, int len,
11983 ULONGEST offset, int *remote_errno)
11985 struct remote_state *rs = get_remote_state ();
11987 int left = get_remote_packet_size ();
11990 rs->readahead_cache.invalidate_fd (fd);
11992 remote_buffer_add_string (&p, &left, "vFile:pwrite:");
11994 remote_buffer_add_int (&p, &left, fd);
11995 remote_buffer_add_string (&p, &left, ",");
11997 remote_buffer_add_int (&p, &left, offset);
11998 remote_buffer_add_string (&p, &left, ",");
12000 p += remote_escape_output (write_buf, len, 1, (gdb_byte *) p, &out_len,
12001 get_remote_packet_size () - (p - rs->buf));
12003 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_pwrite,
12004 remote_errno, NULL, NULL);
12008 remote_target::fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
12009 ULONGEST offset, int *remote_errno)
12011 return remote_hostio_pwrite (fd, write_buf, len, offset, remote_errno);
12014 /* Helper for the implementation of to_fileio_pread. Read the file
12015 from the remote side with vFile:pread. */
12018 remote_target::remote_hostio_pread_vFile (int fd, gdb_byte *read_buf, int len,
12019 ULONGEST offset, int *remote_errno)
12021 struct remote_state *rs = get_remote_state ();
12024 int left = get_remote_packet_size ();
12025 int ret, attachment_len;
12028 remote_buffer_add_string (&p, &left, "vFile:pread:");
12030 remote_buffer_add_int (&p, &left, fd);
12031 remote_buffer_add_string (&p, &left, ",");
12033 remote_buffer_add_int (&p, &left, len);
12034 remote_buffer_add_string (&p, &left, ",");
12036 remote_buffer_add_int (&p, &left, offset);
12038 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_pread,
12039 remote_errno, &attachment,
12045 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
12047 if (read_len != ret)
12048 error (_("Read returned %d, but %d bytes."), ret, (int) read_len);
12053 /* See declaration.h. */
12056 readahead_cache::pread (int fd, gdb_byte *read_buf, size_t len,
12060 && this->offset <= offset
12061 && offset < this->offset + this->bufsize)
12063 ULONGEST max = this->offset + this->bufsize;
12065 if (offset + len > max)
12066 len = max - offset;
12068 memcpy (read_buf, this->buf + offset - this->offset, len);
12075 /* Implementation of to_fileio_pread. */
12078 remote_target::remote_hostio_pread (int fd, gdb_byte *read_buf, int len,
12079 ULONGEST offset, int *remote_errno)
12082 struct remote_state *rs = get_remote_state ();
12083 readahead_cache *cache = &rs->readahead_cache;
12085 ret = cache->pread (fd, read_buf, len, offset);
12088 cache->hit_count++;
12091 fprintf_unfiltered (gdb_stdlog, "readahead cache hit %s\n",
12092 pulongest (cache->hit_count));
12096 cache->miss_count++;
12098 fprintf_unfiltered (gdb_stdlog, "readahead cache miss %s\n",
12099 pulongest (cache->miss_count));
12102 cache->offset = offset;
12103 cache->bufsize = get_remote_packet_size ();
12104 cache->buf = (gdb_byte *) xrealloc (cache->buf, cache->bufsize);
12106 ret = remote_hostio_pread_vFile (cache->fd, cache->buf, cache->bufsize,
12107 cache->offset, remote_errno);
12110 cache->invalidate_fd (fd);
12114 cache->bufsize = ret;
12115 return cache->pread (fd, read_buf, len, offset);
12119 remote_target::fileio_pread (int fd, gdb_byte *read_buf, int len,
12120 ULONGEST offset, int *remote_errno)
12122 return remote_hostio_pread (fd, read_buf, len, offset, remote_errno);
12125 /* Implementation of to_fileio_close. */
12128 remote_target::remote_hostio_close (int fd, int *remote_errno)
12130 struct remote_state *rs = get_remote_state ();
12132 int left = get_remote_packet_size () - 1;
12134 rs->readahead_cache.invalidate_fd (fd);
12136 remote_buffer_add_string (&p, &left, "vFile:close:");
12138 remote_buffer_add_int (&p, &left, fd);
12140 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_close,
12141 remote_errno, NULL, NULL);
12145 remote_target::fileio_close (int fd, int *remote_errno)
12147 return remote_hostio_close (fd, remote_errno);
12150 /* Implementation of to_fileio_unlink. */
12153 remote_target::remote_hostio_unlink (inferior *inf, const char *filename,
12156 struct remote_state *rs = get_remote_state ();
12158 int left = get_remote_packet_size () - 1;
12160 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
12163 remote_buffer_add_string (&p, &left, "vFile:unlink:");
12165 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
12166 strlen (filename));
12168 return remote_hostio_send_command (p - rs->buf, PACKET_vFile_unlink,
12169 remote_errno, NULL, NULL);
12173 remote_target::fileio_unlink (struct inferior *inf, const char *filename,
12176 return remote_hostio_unlink (inf, filename, remote_errno);
12179 /* Implementation of to_fileio_readlink. */
12181 gdb::optional<std::string>
12182 remote_target::fileio_readlink (struct inferior *inf, const char *filename,
12185 struct remote_state *rs = get_remote_state ();
12188 int left = get_remote_packet_size ();
12189 int len, attachment_len;
12192 if (remote_hostio_set_filesystem (inf, remote_errno) != 0)
12195 remote_buffer_add_string (&p, &left, "vFile:readlink:");
12197 remote_buffer_add_bytes (&p, &left, (const gdb_byte *) filename,
12198 strlen (filename));
12200 len = remote_hostio_send_command (p - rs->buf, PACKET_vFile_readlink,
12201 remote_errno, &attachment,
12207 std::string ret (len, '\0');
12209 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
12210 (gdb_byte *) &ret[0], len);
12211 if (read_len != len)
12212 error (_("Readlink returned %d, but %d bytes."), len, read_len);
12217 /* Implementation of to_fileio_fstat. */
12220 remote_target::fileio_fstat (int fd, struct stat *st, int *remote_errno)
12222 struct remote_state *rs = get_remote_state ();
12224 int left = get_remote_packet_size ();
12225 int attachment_len, ret;
12227 struct fio_stat fst;
12230 remote_buffer_add_string (&p, &left, "vFile:fstat:");
12232 remote_buffer_add_int (&p, &left, fd);
12234 ret = remote_hostio_send_command (p - rs->buf, PACKET_vFile_fstat,
12235 remote_errno, &attachment,
12239 if (*remote_errno != FILEIO_ENOSYS)
12242 /* Strictly we should return -1, ENOSYS here, but when
12243 "set sysroot remote:" was implemented in August 2008
12244 BFD's need for a stat function was sidestepped with
12245 this hack. This was not remedied until March 2015
12246 so we retain the previous behavior to avoid breaking
12249 Note that the memset is a March 2015 addition; older
12250 GDBs set st_size *and nothing else* so the structure
12251 would have garbage in all other fields. This might
12252 break something but retaining the previous behavior
12253 here would be just too wrong. */
12255 memset (st, 0, sizeof (struct stat));
12256 st->st_size = INT_MAX;
12260 read_len = remote_unescape_input ((gdb_byte *) attachment, attachment_len,
12261 (gdb_byte *) &fst, sizeof (fst));
12263 if (read_len != ret)
12264 error (_("vFile:fstat returned %d, but %d bytes."), ret, read_len);
12266 if (read_len != sizeof (fst))
12267 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12268 read_len, (int) sizeof (fst));
12270 remote_fileio_to_host_stat (&fst, st);
12275 /* Implementation of to_filesystem_is_local. */
12278 remote_target::filesystem_is_local ()
12280 /* Valgrind GDB presents itself as a remote target but works
12281 on the local filesystem: it does not implement remote get
12282 and users are not expected to set a sysroot. To handle
12283 this case we treat the remote filesystem as local if the
12284 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12285 does not support vFile:open. */
12286 if (strcmp (gdb_sysroot, TARGET_SYSROOT_PREFIX) == 0)
12288 enum packet_support ps = packet_support (PACKET_vFile_open);
12290 if (ps == PACKET_SUPPORT_UNKNOWN)
12292 int fd, remote_errno;
12294 /* Try opening a file to probe support. The supplied
12295 filename is irrelevant, we only care about whether
12296 the stub recognizes the packet or not. */
12297 fd = remote_hostio_open (NULL, "just probing",
12298 FILEIO_O_RDONLY, 0700, 0,
12302 remote_hostio_close (fd, &remote_errno);
12304 ps = packet_support (PACKET_vFile_open);
12307 if (ps == PACKET_DISABLE)
12309 static int warning_issued = 0;
12311 if (!warning_issued)
12313 warning (_("remote target does not support file"
12314 " transfer, attempting to access files"
12315 " from local filesystem."));
12316 warning_issued = 1;
12327 remote_fileio_errno_to_host (int errnum)
12333 case FILEIO_ENOENT:
12341 case FILEIO_EACCES:
12343 case FILEIO_EFAULT:
12347 case FILEIO_EEXIST:
12349 case FILEIO_ENODEV:
12351 case FILEIO_ENOTDIR:
12353 case FILEIO_EISDIR:
12355 case FILEIO_EINVAL:
12357 case FILEIO_ENFILE:
12359 case FILEIO_EMFILE:
12363 case FILEIO_ENOSPC:
12365 case FILEIO_ESPIPE:
12369 case FILEIO_ENOSYS:
12371 case FILEIO_ENAMETOOLONG:
12372 return ENAMETOOLONG;
12378 remote_hostio_error (int errnum)
12380 int host_error = remote_fileio_errno_to_host (errnum);
12382 if (host_error == -1)
12383 error (_("Unknown remote I/O error %d"), errnum);
12385 error (_("Remote I/O error: %s"), safe_strerror (host_error));
12388 /* A RAII wrapper around a remote file descriptor. */
12390 class scoped_remote_fd
12393 scoped_remote_fd (remote_target *remote, int fd)
12394 : m_remote (remote), m_fd (fd)
12398 ~scoped_remote_fd ()
12405 m_remote->remote_hostio_close (m_fd, &remote_errno);
12409 /* Swallow exception before it escapes the dtor. If
12410 something goes wrong, likely the connection is gone,
12411 and there's nothing else that can be done. */
12416 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd);
12418 /* Release ownership of the file descriptor, and return it. */
12419 int release () noexcept
12426 /* Return the owned file descriptor. */
12427 int get () const noexcept
12433 /* The remote target. */
12434 remote_target *m_remote;
12436 /* The owned remote I/O file descriptor. */
12441 remote_file_put (const char *local_file, const char *remote_file, int from_tty)
12443 remote_target *remote = get_current_remote_target ();
12445 if (remote == nullptr)
12446 error (_("command can only be used with remote target"));
12448 remote->remote_file_put (local_file, remote_file, from_tty);
12452 remote_target::remote_file_put (const char *local_file, const char *remote_file,
12455 int retcode, remote_errno, bytes, io_size;
12456 int bytes_in_buffer;
12460 gdb_file_up file = gdb_fopen_cloexec (local_file, "rb");
12462 perror_with_name (local_file);
12464 scoped_remote_fd fd
12465 (this, remote_hostio_open (NULL,
12466 remote_file, (FILEIO_O_WRONLY | FILEIO_O_CREAT
12468 0700, 0, &remote_errno));
12469 if (fd.get () == -1)
12470 remote_hostio_error (remote_errno);
12472 /* Send up to this many bytes at once. They won't all fit in the
12473 remote packet limit, so we'll transfer slightly fewer. */
12474 io_size = get_remote_packet_size ();
12475 gdb::byte_vector buffer (io_size);
12477 bytes_in_buffer = 0;
12480 while (bytes_in_buffer || !saw_eof)
12484 bytes = fread (buffer.data () + bytes_in_buffer, 1,
12485 io_size - bytes_in_buffer,
12489 if (ferror (file.get ()))
12490 error (_("Error reading %s."), local_file);
12493 /* EOF. Unless there is something still in the
12494 buffer from the last iteration, we are done. */
12496 if (bytes_in_buffer == 0)
12504 bytes += bytes_in_buffer;
12505 bytes_in_buffer = 0;
12507 retcode = remote_hostio_pwrite (fd.get (), buffer.data (), bytes,
12508 offset, &remote_errno);
12511 remote_hostio_error (remote_errno);
12512 else if (retcode == 0)
12513 error (_("Remote write of %d bytes returned 0!"), bytes);
12514 else if (retcode < bytes)
12516 /* Short write. Save the rest of the read data for the next
12518 bytes_in_buffer = bytes - retcode;
12519 memmove (buffer.data (), buffer.data () + retcode, bytes_in_buffer);
12525 if (remote_hostio_close (fd.release (), &remote_errno))
12526 remote_hostio_error (remote_errno);
12529 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file);
12533 remote_file_get (const char *remote_file, const char *local_file, int from_tty)
12535 remote_target *remote = get_current_remote_target ();
12537 if (remote == nullptr)
12538 error (_("command can only be used with remote target"));
12540 remote->remote_file_get (remote_file, local_file, from_tty);
12544 remote_target::remote_file_get (const char *remote_file, const char *local_file,
12547 int remote_errno, bytes, io_size;
12550 scoped_remote_fd fd
12551 (this, remote_hostio_open (NULL,
12552 remote_file, FILEIO_O_RDONLY, 0, 0,
12554 if (fd.get () == -1)
12555 remote_hostio_error (remote_errno);
12557 gdb_file_up file = gdb_fopen_cloexec (local_file, "wb");
12559 perror_with_name (local_file);
12561 /* Send up to this many bytes at once. They won't all fit in the
12562 remote packet limit, so we'll transfer slightly fewer. */
12563 io_size = get_remote_packet_size ();
12564 gdb::byte_vector buffer (io_size);
12569 bytes = remote_hostio_pread (fd.get (), buffer.data (), io_size, offset,
12572 /* Success, but no bytes, means end-of-file. */
12575 remote_hostio_error (remote_errno);
12579 bytes = fwrite (buffer.data (), 1, bytes, file.get ());
12581 perror_with_name (local_file);
12584 if (remote_hostio_close (fd.release (), &remote_errno))
12585 remote_hostio_error (remote_errno);
12588 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file);
12592 remote_file_delete (const char *remote_file, int from_tty)
12594 remote_target *remote = get_current_remote_target ();
12596 if (remote == nullptr)
12597 error (_("command can only be used with remote target"));
12599 remote->remote_file_delete (remote_file, from_tty);
12603 remote_target::remote_file_delete (const char *remote_file, int from_tty)
12605 int retcode, remote_errno;
12607 retcode = remote_hostio_unlink (NULL, remote_file, &remote_errno);
12609 remote_hostio_error (remote_errno);
12612 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file);
12616 remote_put_command (const char *args, int from_tty)
12619 error_no_arg (_("file to put"));
12621 gdb_argv argv (args);
12622 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
12623 error (_("Invalid parameters to remote put"));
12625 remote_file_put (argv[0], argv[1], from_tty);
12629 remote_get_command (const char *args, int from_tty)
12632 error_no_arg (_("file to get"));
12634 gdb_argv argv (args);
12635 if (argv[0] == NULL || argv[1] == NULL || argv[2] != NULL)
12636 error (_("Invalid parameters to remote get"));
12638 remote_file_get (argv[0], argv[1], from_tty);
12642 remote_delete_command (const char *args, int from_tty)
12645 error_no_arg (_("file to delete"));
12647 gdb_argv argv (args);
12648 if (argv[0] == NULL || argv[1] != NULL)
12649 error (_("Invalid parameters to remote delete"));
12651 remote_file_delete (argv[0], from_tty);
12655 remote_command (const char *args, int from_tty)
12657 help_list (remote_cmdlist, "remote ", all_commands, gdb_stdout);
12661 remote_target::can_execute_reverse ()
12663 if (packet_support (PACKET_bs) == PACKET_ENABLE
12664 || packet_support (PACKET_bc) == PACKET_ENABLE)
12671 remote_target::supports_non_stop ()
12677 remote_target::supports_disable_randomization ()
12679 /* Only supported in extended mode. */
12684 remote_target::supports_multi_process ()
12686 struct remote_state *rs = get_remote_state ();
12688 return remote_multi_process_p (rs);
12692 remote_supports_cond_tracepoints ()
12694 return packet_support (PACKET_ConditionalTracepoints) == PACKET_ENABLE;
12698 remote_target::supports_evaluation_of_breakpoint_conditions ()
12700 return packet_support (PACKET_ConditionalBreakpoints) == PACKET_ENABLE;
12704 remote_supports_fast_tracepoints ()
12706 return packet_support (PACKET_FastTracepoints) == PACKET_ENABLE;
12710 remote_supports_static_tracepoints ()
12712 return packet_support (PACKET_StaticTracepoints) == PACKET_ENABLE;
12716 remote_supports_install_in_trace ()
12718 return packet_support (PACKET_InstallInTrace) == PACKET_ENABLE;
12722 remote_target::supports_enable_disable_tracepoint ()
12724 return (packet_support (PACKET_EnableDisableTracepoints_feature)
12729 remote_target::supports_string_tracing ()
12731 return packet_support (PACKET_tracenz_feature) == PACKET_ENABLE;
12735 remote_target::can_run_breakpoint_commands ()
12737 return packet_support (PACKET_BreakpointCommands) == PACKET_ENABLE;
12741 remote_target::trace_init ()
12743 struct remote_state *rs = get_remote_state ();
12746 remote_get_noisy_reply ();
12747 if (strcmp (rs->buf, "OK") != 0)
12748 error (_("Target does not support this command."));
12751 /* Recursive routine to walk through command list including loops, and
12752 download packets for each command. */
12755 remote_target::remote_download_command_source (int num, ULONGEST addr,
12756 struct command_line *cmds)
12758 struct remote_state *rs = get_remote_state ();
12759 struct command_line *cmd;
12761 for (cmd = cmds; cmd; cmd = cmd->next)
12763 QUIT; /* Allow user to bail out with ^C. */
12764 strcpy (rs->buf, "QTDPsrc:");
12765 encode_source_string (num, addr, "cmd", cmd->line,
12766 rs->buf + strlen (rs->buf),
12767 rs->buf_size - strlen (rs->buf));
12769 remote_get_noisy_reply ();
12770 if (strcmp (rs->buf, "OK"))
12771 warning (_("Target does not support source download."));
12773 if (cmd->control_type == while_control
12774 || cmd->control_type == while_stepping_control)
12776 remote_download_command_source (num, addr, cmd->body_list_0.get ());
12778 QUIT; /* Allow user to bail out with ^C. */
12779 strcpy (rs->buf, "QTDPsrc:");
12780 encode_source_string (num, addr, "cmd", "end",
12781 rs->buf + strlen (rs->buf),
12782 rs->buf_size - strlen (rs->buf));
12784 remote_get_noisy_reply ();
12785 if (strcmp (rs->buf, "OK"))
12786 warning (_("Target does not support source download."));
12792 remote_target::download_tracepoint (struct bp_location *loc)
12796 std::vector<std::string> tdp_actions;
12797 std::vector<std::string> stepping_actions;
12799 struct breakpoint *b = loc->owner;
12800 struct tracepoint *t = (struct tracepoint *) b;
12801 struct remote_state *rs = get_remote_state ();
12803 const char *err_msg = _("Tracepoint packet too large for target.");
12806 /* We use a buffer other than rs->buf because we'll build strings
12807 across multiple statements, and other statements in between could
12809 gdb::char_vector buf (get_remote_packet_size ());
12811 encode_actions_rsp (loc, &tdp_actions, &stepping_actions);
12813 tpaddr = loc->address;
12814 sprintf_vma (addrbuf, tpaddr);
12815 ret = snprintf (buf.data (), buf.size (), "QTDP:%x:%s:%c:%lx:%x",
12816 b->number, addrbuf, /* address */
12817 (b->enable_state == bp_enabled ? 'E' : 'D'),
12818 t->step_count, t->pass_count);
12820 if (ret < 0 || ret >= buf.size ())
12821 error ("%s", err_msg);
12823 /* Fast tracepoints are mostly handled by the target, but we can
12824 tell the target how big of an instruction block should be moved
12826 if (b->type == bp_fast_tracepoint)
12828 /* Only test for support at download time; we may not know
12829 target capabilities at definition time. */
12830 if (remote_supports_fast_tracepoints ())
12832 if (gdbarch_fast_tracepoint_valid_at (loc->gdbarch, tpaddr,
12835 size_left = buf.size () - strlen (buf.data ());
12836 ret = snprintf (buf.data () + strlen (buf.data ()),
12838 gdb_insn_length (loc->gdbarch, tpaddr));
12840 if (ret < 0 || ret >= size_left)
12841 error ("%s", err_msg);
12844 /* If it passed validation at definition but fails now,
12845 something is very wrong. */
12846 internal_error (__FILE__, __LINE__,
12847 _("Fast tracepoint not "
12848 "valid during download"));
12851 /* Fast tracepoints are functionally identical to regular
12852 tracepoints, so don't take lack of support as a reason to
12853 give up on the trace run. */
12854 warning (_("Target does not support fast tracepoints, "
12855 "downloading %d as regular tracepoint"), b->number);
12857 else if (b->type == bp_static_tracepoint)
12859 /* Only test for support at download time; we may not know
12860 target capabilities at definition time. */
12861 if (remote_supports_static_tracepoints ())
12863 struct static_tracepoint_marker marker;
12865 if (target_static_tracepoint_marker_at (tpaddr, &marker))
12867 size_left = buf.size () - strlen (buf.data ());
12868 ret = snprintf (buf.data () + strlen (buf.data ()),
12871 if (ret < 0 || ret >= size_left)
12872 error ("%s", err_msg);
12875 error (_("Static tracepoint not valid during download"));
12878 /* Fast tracepoints are functionally identical to regular
12879 tracepoints, so don't take lack of support as a reason
12880 to give up on the trace run. */
12881 error (_("Target does not support static tracepoints"));
12883 /* If the tracepoint has a conditional, make it into an agent
12884 expression and append to the definition. */
12887 /* Only test support at download time, we may not know target
12888 capabilities at definition time. */
12889 if (remote_supports_cond_tracepoints ())
12891 agent_expr_up aexpr = gen_eval_for_expr (tpaddr,
12894 size_left = buf.size () - strlen (buf.data ());
12896 ret = snprintf (buf.data () + strlen (buf.data ()),
12897 size_left, ":X%x,", aexpr->len);
12899 if (ret < 0 || ret >= size_left)
12900 error ("%s", err_msg);
12902 size_left = buf.size () - strlen (buf.data ());
12904 /* Two bytes to encode each aexpr byte, plus the terminating
12906 if (aexpr->len * 2 + 1 > size_left)
12907 error ("%s", err_msg);
12909 pkt = buf.data () + strlen (buf.data ());
12911 for (int ndx = 0; ndx < aexpr->len; ++ndx)
12912 pkt = pack_hex_byte (pkt, aexpr->buf[ndx]);
12916 warning (_("Target does not support conditional tracepoints, "
12917 "ignoring tp %d cond"), b->number);
12920 if (b->commands || *default_collect)
12922 size_left = buf.size () - strlen (buf.data ());
12924 ret = snprintf (buf.data () + strlen (buf.data ()),
12927 if (ret < 0 || ret >= size_left)
12928 error ("%s", err_msg);
12931 putpkt (buf.data ());
12932 remote_get_noisy_reply ();
12933 if (strcmp (rs->buf, "OK"))
12934 error (_("Target does not support tracepoints."));
12936 /* do_single_steps (t); */
12937 for (auto action_it = tdp_actions.begin ();
12938 action_it != tdp_actions.end (); action_it++)
12940 QUIT; /* Allow user to bail out with ^C. */
12942 bool has_more = ((action_it + 1) != tdp_actions.end ()
12943 || !stepping_actions.empty ());
12945 ret = snprintf (buf.data (), buf.size (), "QTDP:-%x:%s:%s%c",
12946 b->number, addrbuf, /* address */
12947 action_it->c_str (),
12948 has_more ? '-' : 0);
12950 if (ret < 0 || ret >= buf.size ())
12951 error ("%s", err_msg);
12953 putpkt (buf.data ());
12954 remote_get_noisy_reply ();
12955 if (strcmp (rs->buf, "OK"))
12956 error (_("Error on target while setting tracepoints."));
12959 for (auto action_it = stepping_actions.begin ();
12960 action_it != stepping_actions.end (); action_it++)
12962 QUIT; /* Allow user to bail out with ^C. */
12964 bool is_first = action_it == stepping_actions.begin ();
12965 bool has_more = (action_it + 1) != stepping_actions.end ();
12967 ret = snprintf (buf.data (), buf.size (), "QTDP:-%x:%s:%s%s%s",
12968 b->number, addrbuf, /* address */
12969 is_first ? "S" : "",
12970 action_it->c_str (),
12971 has_more ? "-" : "");
12973 if (ret < 0 || ret >= buf.size ())
12974 error ("%s", err_msg);
12976 putpkt (buf.data ());
12977 remote_get_noisy_reply ();
12978 if (strcmp (rs->buf, "OK"))
12979 error (_("Error on target while setting tracepoints."));
12982 if (packet_support (PACKET_TracepointSource) == PACKET_ENABLE)
12984 if (b->location != NULL)
12986 ret = snprintf (buf.data (), buf.size (), "QTDPsrc:");
12988 if (ret < 0 || ret >= buf.size ())
12989 error ("%s", err_msg);
12991 encode_source_string (b->number, loc->address, "at",
12992 event_location_to_string (b->location.get ()),
12993 buf.data () + strlen (buf.data ()),
12994 buf.size () - strlen (buf.data ()));
12995 putpkt (buf.data ());
12996 remote_get_noisy_reply ();
12997 if (strcmp (rs->buf, "OK"))
12998 warning (_("Target does not support source download."));
13000 if (b->cond_string)
13002 ret = snprintf (buf.data (), buf.size (), "QTDPsrc:");
13004 if (ret < 0 || ret >= buf.size ())
13005 error ("%s", err_msg);
13007 encode_source_string (b->number, loc->address,
13008 "cond", b->cond_string,
13009 buf.data () + strlen (buf.data ()),
13010 buf.size () - strlen (buf.data ()));
13011 putpkt (buf.data ());
13012 remote_get_noisy_reply ();
13013 if (strcmp (rs->buf, "OK"))
13014 warning (_("Target does not support source download."));
13016 remote_download_command_source (b->number, loc->address,
13017 breakpoint_commands (b));
13022 remote_target::can_download_tracepoint ()
13024 struct remote_state *rs = get_remote_state ();
13025 struct trace_status *ts;
13028 /* Don't try to install tracepoints until we've relocated our
13029 symbols, and fetched and merged the target's tracepoint list with
13031 if (rs->starting_up)
13034 ts = current_trace_status ();
13035 status = get_trace_status (ts);
13037 if (status == -1 || !ts->running_known || !ts->running)
13040 /* If we are in a tracing experiment, but remote stub doesn't support
13041 installing tracepoint in trace, we have to return. */
13042 if (!remote_supports_install_in_trace ())
13050 remote_target::download_trace_state_variable (const trace_state_variable &tsv)
13052 struct remote_state *rs = get_remote_state ();
13055 xsnprintf (rs->buf, get_remote_packet_size (), "QTDV:%x:%s:%x:",
13056 tsv.number, phex ((ULONGEST) tsv.initial_value, 8),
13058 p = rs->buf + strlen (rs->buf);
13059 if ((p - rs->buf) + tsv.name.length () * 2 >= get_remote_packet_size ())
13060 error (_("Trace state variable name too long for tsv definition packet"));
13061 p += 2 * bin2hex ((gdb_byte *) (tsv.name.data ()), p, tsv.name.length ());
13064 remote_get_noisy_reply ();
13065 if (*rs->buf == '\0')
13066 error (_("Target does not support this command."));
13067 if (strcmp (rs->buf, "OK") != 0)
13068 error (_("Error on target while downloading trace state variable."));
13072 remote_target::enable_tracepoint (struct bp_location *location)
13074 struct remote_state *rs = get_remote_state ();
13077 sprintf_vma (addr_buf, location->address);
13078 xsnprintf (rs->buf, get_remote_packet_size (), "QTEnable:%x:%s",
13079 location->owner->number, addr_buf);
13081 remote_get_noisy_reply ();
13082 if (*rs->buf == '\0')
13083 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13084 if (strcmp (rs->buf, "OK") != 0)
13085 error (_("Error on target while enabling tracepoint."));
13089 remote_target::disable_tracepoint (struct bp_location *location)
13091 struct remote_state *rs = get_remote_state ();
13094 sprintf_vma (addr_buf, location->address);
13095 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisable:%x:%s",
13096 location->owner->number, addr_buf);
13098 remote_get_noisy_reply ();
13099 if (*rs->buf == '\0')
13100 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13101 if (strcmp (rs->buf, "OK") != 0)
13102 error (_("Error on target while disabling tracepoint."));
13106 remote_target::trace_set_readonly_regions ()
13110 bfd_size_type size;
13116 return; /* No information to give. */
13118 struct remote_state *rs = get_remote_state ();
13120 strcpy (rs->buf, "QTro");
13121 offset = strlen (rs->buf);
13122 for (s = exec_bfd->sections; s; s = s->next)
13124 char tmp1[40], tmp2[40];
13127 if ((s->flags & SEC_LOAD) == 0 ||
13128 /* (s->flags & SEC_CODE) == 0 || */
13129 (s->flags & SEC_READONLY) == 0)
13133 vma = bfd_get_section_vma (abfd, s);
13134 size = bfd_get_section_size (s);
13135 sprintf_vma (tmp1, vma);
13136 sprintf_vma (tmp2, vma + size);
13137 sec_length = 1 + strlen (tmp1) + 1 + strlen (tmp2);
13138 if (offset + sec_length + 1 > rs->buf_size)
13140 if (packet_support (PACKET_qXfer_traceframe_info) != PACKET_ENABLE)
13142 Too many sections for read-only sections definition packet."));
13145 xsnprintf (rs->buf + offset, rs->buf_size - offset, ":%s,%s",
13147 offset += sec_length;
13152 getpkt (&rs->buf, &rs->buf_size, 0);
13157 remote_target::trace_start ()
13159 struct remote_state *rs = get_remote_state ();
13161 putpkt ("QTStart");
13162 remote_get_noisy_reply ();
13163 if (*rs->buf == '\0')
13164 error (_("Target does not support this command."));
13165 if (strcmp (rs->buf, "OK") != 0)
13166 error (_("Bogus reply from target: %s"), rs->buf);
13170 remote_target::get_trace_status (struct trace_status *ts)
13172 /* Initialize it just to avoid a GCC false warning. */
13174 /* FIXME we need to get register block size some other way. */
13175 extern int trace_regblock_size;
13176 enum packet_result result;
13177 struct remote_state *rs = get_remote_state ();
13179 if (packet_support (PACKET_qTStatus) == PACKET_DISABLE)
13182 trace_regblock_size
13183 = rs->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet;
13185 putpkt ("qTStatus");
13189 p = remote_get_noisy_reply ();
13191 CATCH (ex, RETURN_MASK_ERROR)
13193 if (ex.error != TARGET_CLOSE_ERROR)
13195 exception_fprintf (gdb_stderr, ex, "qTStatus: ");
13198 throw_exception (ex);
13202 result = packet_ok (p, &remote_protocol_packets[PACKET_qTStatus]);
13204 /* If the remote target doesn't do tracing, flag it. */
13205 if (result == PACKET_UNKNOWN)
13208 /* We're working with a live target. */
13209 ts->filename = NULL;
13212 error (_("Bogus trace status reply from target: %s"), rs->buf);
13214 /* Function 'parse_trace_status' sets default value of each field of
13215 'ts' at first, so we don't have to do it here. */
13216 parse_trace_status (p, ts);
13218 return ts->running;
13222 remote_target::get_tracepoint_status (struct breakpoint *bp,
13223 struct uploaded_tp *utp)
13225 struct remote_state *rs = get_remote_state ();
13227 struct bp_location *loc;
13228 struct tracepoint *tp = (struct tracepoint *) bp;
13229 size_t size = get_remote_packet_size ();
13234 tp->traceframe_usage = 0;
13235 for (loc = tp->loc; loc; loc = loc->next)
13237 /* If the tracepoint was never downloaded, don't go asking for
13239 if (tp->number_on_target == 0)
13241 xsnprintf (rs->buf, size, "qTP:%x:%s", tp->number_on_target,
13242 phex_nz (loc->address, 0));
13244 reply = remote_get_noisy_reply ();
13245 if (reply && *reply)
13248 parse_tracepoint_status (reply + 1, bp, utp);
13254 utp->hit_count = 0;
13255 utp->traceframe_usage = 0;
13256 xsnprintf (rs->buf, size, "qTP:%x:%s", utp->number,
13257 phex_nz (utp->addr, 0));
13259 reply = remote_get_noisy_reply ();
13260 if (reply && *reply)
13263 parse_tracepoint_status (reply + 1, bp, utp);
13269 remote_target::trace_stop ()
13271 struct remote_state *rs = get_remote_state ();
13274 remote_get_noisy_reply ();
13275 if (*rs->buf == '\0')
13276 error (_("Target does not support this command."));
13277 if (strcmp (rs->buf, "OK") != 0)
13278 error (_("Bogus reply from target: %s"), rs->buf);
13282 remote_target::trace_find (enum trace_find_type type, int num,
13283 CORE_ADDR addr1, CORE_ADDR addr2,
13286 struct remote_state *rs = get_remote_state ();
13287 char *endbuf = rs->buf + get_remote_packet_size ();
13289 int target_frameno = -1, target_tracept = -1;
13291 /* Lookups other than by absolute frame number depend on the current
13292 trace selected, so make sure it is correct on the remote end
13294 if (type != tfind_number)
13295 set_remote_traceframe ();
13298 strcpy (p, "QTFrame:");
13299 p = strchr (p, '\0');
13303 xsnprintf (p, endbuf - p, "%x", num);
13306 xsnprintf (p, endbuf - p, "pc:%s", phex_nz (addr1, 0));
13309 xsnprintf (p, endbuf - p, "tdp:%x", num);
13312 xsnprintf (p, endbuf - p, "range:%s:%s", phex_nz (addr1, 0),
13313 phex_nz (addr2, 0));
13315 case tfind_outside:
13316 xsnprintf (p, endbuf - p, "outside:%s:%s", phex_nz (addr1, 0),
13317 phex_nz (addr2, 0));
13320 error (_("Unknown trace find type %d"), type);
13324 reply = remote_get_noisy_reply ();
13325 if (*reply == '\0')
13326 error (_("Target does not support this command."));
13328 while (reply && *reply)
13333 target_frameno = (int) strtol (p, &reply, 16);
13335 error (_("Unable to parse trace frame number"));
13336 /* Don't update our remote traceframe number cache on failure
13337 to select a remote traceframe. */
13338 if (target_frameno == -1)
13343 target_tracept = (int) strtol (p, &reply, 16);
13345 error (_("Unable to parse tracepoint number"));
13347 case 'O': /* "OK"? */
13348 if (reply[1] == 'K' && reply[2] == '\0')
13351 error (_("Bogus reply from target: %s"), reply);
13354 error (_("Bogus reply from target: %s"), reply);
13357 *tpp = target_tracept;
13359 rs->remote_traceframe_number = target_frameno;
13360 return target_frameno;
13364 remote_target::get_trace_state_variable_value (int tsvnum, LONGEST *val)
13366 struct remote_state *rs = get_remote_state ();
13370 set_remote_traceframe ();
13372 xsnprintf (rs->buf, get_remote_packet_size (), "qTV:%x", tsvnum);
13374 reply = remote_get_noisy_reply ();
13375 if (reply && *reply)
13379 unpack_varlen_hex (reply + 1, &uval);
13380 *val = (LONGEST) uval;
13388 remote_target::save_trace_data (const char *filename)
13390 struct remote_state *rs = get_remote_state ();
13394 strcpy (p, "QTSave:");
13396 if ((p - rs->buf) + strlen (filename) * 2 >= get_remote_packet_size ())
13397 error (_("Remote file name too long for trace save packet"));
13398 p += 2 * bin2hex ((gdb_byte *) filename, p, strlen (filename));
13401 reply = remote_get_noisy_reply ();
13402 if (*reply == '\0')
13403 error (_("Target does not support this command."));
13404 if (strcmp (reply, "OK") != 0)
13405 error (_("Bogus reply from target: %s"), reply);
13409 /* This is basically a memory transfer, but needs to be its own packet
13410 because we don't know how the target actually organizes its trace
13411 memory, plus we want to be able to ask for as much as possible, but
13412 not be unhappy if we don't get as much as we ask for. */
13415 remote_target::get_raw_trace_data (gdb_byte *buf, ULONGEST offset, LONGEST len)
13417 struct remote_state *rs = get_remote_state ();
13423 strcpy (p, "qTBuffer:");
13425 p += hexnumstr (p, offset);
13427 p += hexnumstr (p, len);
13431 reply = remote_get_noisy_reply ();
13432 if (reply && *reply)
13434 /* 'l' by itself means we're at the end of the buffer and
13435 there is nothing more to get. */
13439 /* Convert the reply into binary. Limit the number of bytes to
13440 convert according to our passed-in buffer size, rather than
13441 what was returned in the packet; if the target is
13442 unexpectedly generous and gives us a bigger reply than we
13443 asked for, we don't want to crash. */
13444 rslt = hex2bin (reply, buf, len);
13448 /* Something went wrong, flag as an error. */
13453 remote_target::set_disconnected_tracing (int val)
13455 struct remote_state *rs = get_remote_state ();
13457 if (packet_support (PACKET_DisconnectedTracing_feature) == PACKET_ENABLE)
13461 xsnprintf (rs->buf, get_remote_packet_size (), "QTDisconnected:%x", val);
13463 reply = remote_get_noisy_reply ();
13464 if (*reply == '\0')
13465 error (_("Target does not support this command."));
13466 if (strcmp (reply, "OK") != 0)
13467 error (_("Bogus reply from target: %s"), reply);
13470 warning (_("Target does not support disconnected tracing."));
13474 remote_target::core_of_thread (ptid_t ptid)
13476 struct thread_info *info = find_thread_ptid (ptid);
13478 if (info != NULL && info->priv != NULL)
13479 return get_remote_thread_info (info)->core;
13485 remote_target::set_circular_trace_buffer (int val)
13487 struct remote_state *rs = get_remote_state ();
13490 xsnprintf (rs->buf, get_remote_packet_size (), "QTBuffer:circular:%x", val);
13492 reply = remote_get_noisy_reply ();
13493 if (*reply == '\0')
13494 error (_("Target does not support this command."));
13495 if (strcmp (reply, "OK") != 0)
13496 error (_("Bogus reply from target: %s"), reply);
13500 remote_target::traceframe_info ()
13502 gdb::optional<gdb::char_vector> text
13503 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO,
13506 return parse_traceframe_info (text->data ());
13511 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13512 instruction on which a fast tracepoint may be placed. Returns -1
13513 if the packet is not supported, and 0 if the minimum instruction
13514 length is unknown. */
13517 remote_target::get_min_fast_tracepoint_insn_len ()
13519 struct remote_state *rs = get_remote_state ();
13522 /* If we're not debugging a process yet, the IPA can't be
13524 if (!target_has_execution)
13527 /* Make sure the remote is pointing at the right process. */
13528 set_general_process ();
13530 xsnprintf (rs->buf, get_remote_packet_size (), "qTMinFTPILen");
13532 reply = remote_get_noisy_reply ();
13533 if (*reply == '\0')
13537 ULONGEST min_insn_len;
13539 unpack_varlen_hex (reply, &min_insn_len);
13541 return (int) min_insn_len;
13546 remote_target::set_trace_buffer_size (LONGEST val)
13548 if (packet_support (PACKET_QTBuffer_size) != PACKET_DISABLE)
13550 struct remote_state *rs = get_remote_state ();
13551 char *buf = rs->buf;
13552 char *endbuf = rs->buf + get_remote_packet_size ();
13553 enum packet_result result;
13555 gdb_assert (val >= 0 || val == -1);
13556 buf += xsnprintf (buf, endbuf - buf, "QTBuffer:size:");
13557 /* Send -1 as literal "-1" to avoid host size dependency. */
13561 buf += hexnumstr (buf, (ULONGEST) -val);
13564 buf += hexnumstr (buf, (ULONGEST) val);
13567 remote_get_noisy_reply ();
13568 result = packet_ok (rs->buf,
13569 &remote_protocol_packets[PACKET_QTBuffer_size]);
13571 if (result != PACKET_OK)
13572 warning (_("Bogus reply from target: %s"), rs->buf);
13577 remote_target::set_trace_notes (const char *user, const char *notes,
13578 const char *stop_notes)
13580 struct remote_state *rs = get_remote_state ();
13582 char *buf = rs->buf;
13583 char *endbuf = rs->buf + get_remote_packet_size ();
13586 buf += xsnprintf (buf, endbuf - buf, "QTNotes:");
13589 buf += xsnprintf (buf, endbuf - buf, "user:");
13590 nbytes = bin2hex ((gdb_byte *) user, buf, strlen (user));
13596 buf += xsnprintf (buf, endbuf - buf, "notes:");
13597 nbytes = bin2hex ((gdb_byte *) notes, buf, strlen (notes));
13603 buf += xsnprintf (buf, endbuf - buf, "tstop:");
13604 nbytes = bin2hex ((gdb_byte *) stop_notes, buf, strlen (stop_notes));
13608 /* Ensure the buffer is terminated. */
13612 reply = remote_get_noisy_reply ();
13613 if (*reply == '\0')
13616 if (strcmp (reply, "OK") != 0)
13617 error (_("Bogus reply from target: %s"), reply);
13623 remote_target::use_agent (bool use)
13625 if (packet_support (PACKET_QAgent) != PACKET_DISABLE)
13627 struct remote_state *rs = get_remote_state ();
13629 /* If the stub supports QAgent. */
13630 xsnprintf (rs->buf, get_remote_packet_size (), "QAgent:%d", use);
13632 getpkt (&rs->buf, &rs->buf_size, 0);
13634 if (strcmp (rs->buf, "OK") == 0)
13645 remote_target::can_use_agent ()
13647 return (packet_support (PACKET_QAgent) != PACKET_DISABLE);
13650 struct btrace_target_info
13652 /* The ptid of the traced thread. */
13655 /* The obtained branch trace configuration. */
13656 struct btrace_config conf;
13659 /* Reset our idea of our target's btrace configuration. */
13662 remote_btrace_reset (remote_state *rs)
13664 memset (&rs->btrace_config, 0, sizeof (rs->btrace_config));
13667 /* Synchronize the configuration with the target. */
13670 remote_target::btrace_sync_conf (const btrace_config *conf)
13672 struct packet_config *packet;
13673 struct remote_state *rs;
13674 char *buf, *pos, *endbuf;
13676 rs = get_remote_state ();
13678 endbuf = buf + get_remote_packet_size ();
13680 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_bts_size];
13681 if (packet_config_support (packet) == PACKET_ENABLE
13682 && conf->bts.size != rs->btrace_config.bts.size)
13685 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
13689 getpkt (&buf, &rs->buf_size, 0);
13691 if (packet_ok (buf, packet) == PACKET_ERROR)
13693 if (buf[0] == 'E' && buf[1] == '.')
13694 error (_("Failed to configure the BTS buffer size: %s"), buf + 2);
13696 error (_("Failed to configure the BTS buffer size."));
13699 rs->btrace_config.bts.size = conf->bts.size;
13702 packet = &remote_protocol_packets[PACKET_Qbtrace_conf_pt_size];
13703 if (packet_config_support (packet) == PACKET_ENABLE
13704 && conf->pt.size != rs->btrace_config.pt.size)
13707 pos += xsnprintf (pos, endbuf - pos, "%s=0x%x", packet->name,
13711 getpkt (&buf, &rs->buf_size, 0);
13713 if (packet_ok (buf, packet) == PACKET_ERROR)
13715 if (buf[0] == 'E' && buf[1] == '.')
13716 error (_("Failed to configure the trace buffer size: %s"), buf + 2);
13718 error (_("Failed to configure the trace buffer size."));
13721 rs->btrace_config.pt.size = conf->pt.size;
13725 /* Read the current thread's btrace configuration from the target and
13726 store it into CONF. */
13729 btrace_read_config (struct btrace_config *conf)
13731 gdb::optional<gdb::char_vector> xml
13732 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF, "");
13734 parse_xml_btrace_conf (conf, xml->data ());
13737 /* Maybe reopen target btrace. */
13740 remote_target::remote_btrace_maybe_reopen ()
13742 struct remote_state *rs = get_remote_state ();
13743 int btrace_target_pushed = 0;
13744 #if !defined (HAVE_LIBIPT)
13748 scoped_restore_current_thread restore_thread;
13750 for (thread_info *tp : all_non_exited_threads ())
13752 set_general_thread (tp->ptid);
13754 memset (&rs->btrace_config, 0x00, sizeof (struct btrace_config));
13755 btrace_read_config (&rs->btrace_config);
13757 if (rs->btrace_config.format == BTRACE_FORMAT_NONE)
13760 #if !defined (HAVE_LIBIPT)
13761 if (rs->btrace_config.format == BTRACE_FORMAT_PT)
13766 warning (_("Target is recording using Intel Processor Trace "
13767 "but support was disabled at compile time."));
13772 #endif /* !defined (HAVE_LIBIPT) */
13774 /* Push target, once, but before anything else happens. This way our
13775 changes to the threads will be cleaned up by unpushing the target
13776 in case btrace_read_config () throws. */
13777 if (!btrace_target_pushed)
13779 btrace_target_pushed = 1;
13780 record_btrace_push_target ();
13781 printf_filtered (_("Target is recording using %s.\n"),
13782 btrace_format_string (rs->btrace_config.format));
13785 tp->btrace.target = XCNEW (struct btrace_target_info);
13786 tp->btrace.target->ptid = tp->ptid;
13787 tp->btrace.target->conf = rs->btrace_config;
13791 /* Enable branch tracing. */
13793 struct btrace_target_info *
13794 remote_target::enable_btrace (ptid_t ptid, const struct btrace_config *conf)
13796 struct btrace_target_info *tinfo = NULL;
13797 struct packet_config *packet = NULL;
13798 struct remote_state *rs = get_remote_state ();
13799 char *buf = rs->buf;
13800 char *endbuf = rs->buf + get_remote_packet_size ();
13802 switch (conf->format)
13804 case BTRACE_FORMAT_BTS:
13805 packet = &remote_protocol_packets[PACKET_Qbtrace_bts];
13808 case BTRACE_FORMAT_PT:
13809 packet = &remote_protocol_packets[PACKET_Qbtrace_pt];
13813 if (packet == NULL || packet_config_support (packet) != PACKET_ENABLE)
13814 error (_("Target does not support branch tracing."));
13816 btrace_sync_conf (conf);
13818 set_general_thread (ptid);
13820 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
13822 getpkt (&rs->buf, &rs->buf_size, 0);
13824 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
13826 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
13827 error (_("Could not enable branch tracing for %s: %s"),
13828 target_pid_to_str (ptid), rs->buf + 2);
13830 error (_("Could not enable branch tracing for %s."),
13831 target_pid_to_str (ptid));
13834 tinfo = XCNEW (struct btrace_target_info);
13835 tinfo->ptid = ptid;
13837 /* If we fail to read the configuration, we lose some information, but the
13838 tracing itself is not impacted. */
13841 btrace_read_config (&tinfo->conf);
13843 CATCH (err, RETURN_MASK_ERROR)
13845 if (err.message != NULL)
13846 warning ("%s", err.message);
13853 /* Disable branch tracing. */
13856 remote_target::disable_btrace (struct btrace_target_info *tinfo)
13858 struct packet_config *packet = &remote_protocol_packets[PACKET_Qbtrace_off];
13859 struct remote_state *rs = get_remote_state ();
13860 char *buf = rs->buf;
13861 char *endbuf = rs->buf + get_remote_packet_size ();
13863 if (packet_config_support (packet) != PACKET_ENABLE)
13864 error (_("Target does not support branch tracing."));
13866 set_general_thread (tinfo->ptid);
13868 buf += xsnprintf (buf, endbuf - buf, "%s", packet->name);
13870 getpkt (&rs->buf, &rs->buf_size, 0);
13872 if (packet_ok (rs->buf, packet) == PACKET_ERROR)
13874 if (rs->buf[0] == 'E' && rs->buf[1] == '.')
13875 error (_("Could not disable branch tracing for %s: %s"),
13876 target_pid_to_str (tinfo->ptid), rs->buf + 2);
13878 error (_("Could not disable branch tracing for %s."),
13879 target_pid_to_str (tinfo->ptid));
13885 /* Teardown branch tracing. */
13888 remote_target::teardown_btrace (struct btrace_target_info *tinfo)
13890 /* We must not talk to the target during teardown. */
13894 /* Read the branch trace. */
13897 remote_target::read_btrace (struct btrace_data *btrace,
13898 struct btrace_target_info *tinfo,
13899 enum btrace_read_type type)
13901 struct packet_config *packet = &remote_protocol_packets[PACKET_qXfer_btrace];
13904 if (packet_config_support (packet) != PACKET_ENABLE)
13905 error (_("Target does not support branch tracing."));
13907 #if !defined(HAVE_LIBEXPAT)
13908 error (_("Cannot process branch tracing result. XML parsing not supported."));
13913 case BTRACE_READ_ALL:
13916 case BTRACE_READ_NEW:
13919 case BTRACE_READ_DELTA:
13923 internal_error (__FILE__, __LINE__,
13924 _("Bad branch tracing read type: %u."),
13925 (unsigned int) type);
13928 gdb::optional<gdb::char_vector> xml
13929 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE, annex);
13931 return BTRACE_ERR_UNKNOWN;
13933 parse_xml_btrace (btrace, xml->data ());
13935 return BTRACE_ERR_NONE;
13938 const struct btrace_config *
13939 remote_target::btrace_conf (const struct btrace_target_info *tinfo)
13941 return &tinfo->conf;
13945 remote_target::augmented_libraries_svr4_read ()
13947 return (packet_support (PACKET_augmented_libraries_svr4_read_feature)
13951 /* Implementation of to_load. */
13954 remote_target::load (const char *name, int from_tty)
13956 generic_load (name, from_tty);
13959 /* Accepts an integer PID; returns a string representing a file that
13960 can be opened on the remote side to get the symbols for the child
13961 process. Returns NULL if the operation is not supported. */
13964 remote_target::pid_to_exec_file (int pid)
13966 static gdb::optional<gdb::char_vector> filename;
13967 struct inferior *inf;
13968 char *annex = NULL;
13970 if (packet_support (PACKET_qXfer_exec_file) != PACKET_ENABLE)
13973 inf = find_inferior_pid (pid);
13975 internal_error (__FILE__, __LINE__,
13976 _("not currently attached to process %d"), pid);
13978 if (!inf->fake_pid_p)
13980 const int annex_size = 9;
13982 annex = (char *) alloca (annex_size);
13983 xsnprintf (annex, annex_size, "%x", pid);
13986 filename = target_read_stralloc (current_top_target (),
13987 TARGET_OBJECT_EXEC_FILE, annex);
13989 return filename ? filename->data () : nullptr;
13992 /* Implement the to_can_do_single_step target_ops method. */
13995 remote_target::can_do_single_step ()
13997 /* We can only tell whether target supports single step or not by
13998 supported s and S vCont actions if the stub supports vContSupported
13999 feature. If the stub doesn't support vContSupported feature,
14000 we have conservatively to think target doesn't supports single
14002 if (packet_support (PACKET_vContSupported) == PACKET_ENABLE)
14004 struct remote_state *rs = get_remote_state ();
14006 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
14007 remote_vcont_probe ();
14009 return rs->supports_vCont.s && rs->supports_vCont.S;
14015 /* Implementation of the to_execution_direction method for the remote
14018 enum exec_direction_kind
14019 remote_target::execution_direction ()
14021 struct remote_state *rs = get_remote_state ();
14023 return rs->last_resume_exec_dir;
14026 /* Return pointer to the thread_info struct which corresponds to
14027 THREAD_HANDLE (having length HANDLE_LEN). */
14030 remote_target::thread_handle_to_thread_info (const gdb_byte *thread_handle,
14034 for (thread_info *tp : all_non_exited_threads ())
14036 remote_thread_info *priv = get_remote_thread_info (tp);
14038 if (tp->inf == inf && priv != NULL)
14040 if (handle_len != priv->thread_handle.size ())
14041 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14042 handle_len, priv->thread_handle.size ());
14043 if (memcmp (thread_handle, priv->thread_handle.data (),
14053 remote_target::can_async_p ()
14055 struct remote_state *rs = get_remote_state ();
14057 /* We don't go async if the user has explicitly prevented it with the
14058 "maint set target-async" command. */
14059 if (!target_async_permitted)
14062 /* We're async whenever the serial device is. */
14063 return serial_can_async_p (rs->remote_desc);
14067 remote_target::is_async_p ()
14069 struct remote_state *rs = get_remote_state ();
14071 if (!target_async_permitted)
14072 /* We only enable async when the user specifically asks for it. */
14075 /* We're async whenever the serial device is. */
14076 return serial_is_async_p (rs->remote_desc);
14079 /* Pass the SERIAL event on and up to the client. One day this code
14080 will be able to delay notifying the client of an event until the
14081 point where an entire packet has been received. */
14083 static serial_event_ftype remote_async_serial_handler;
14086 remote_async_serial_handler (struct serial *scb, void *context)
14088 /* Don't propogate error information up to the client. Instead let
14089 the client find out about the error by querying the target. */
14090 inferior_event_handler (INF_REG_EVENT, NULL);
14094 remote_async_inferior_event_handler (gdb_client_data data)
14096 inferior_event_handler (INF_REG_EVENT, data);
14100 remote_target::async (int enable)
14102 struct remote_state *rs = get_remote_state ();
14106 serial_async (rs->remote_desc, remote_async_serial_handler, rs);
14108 /* If there are pending events in the stop reply queue tell the
14109 event loop to process them. */
14110 if (!rs->stop_reply_queue.empty ())
14111 mark_async_event_handler (rs->remote_async_inferior_event_token);
14112 /* For simplicity, below we clear the pending events token
14113 without remembering whether it is marked, so here we always
14114 mark it. If there's actually no pending notification to
14115 process, this ends up being a no-op (other than a spurious
14116 event-loop wakeup). */
14117 if (target_is_non_stop_p ())
14118 mark_async_event_handler (rs->notif_state->get_pending_events_token);
14122 serial_async (rs->remote_desc, NULL, NULL);
14123 /* If the core is disabling async, it doesn't want to be
14124 disturbed with target events. Clear all async event sources
14126 clear_async_event_handler (rs->remote_async_inferior_event_token);
14127 if (target_is_non_stop_p ())
14128 clear_async_event_handler (rs->notif_state->get_pending_events_token);
14132 /* Implementation of the to_thread_events method. */
14135 remote_target::thread_events (int enable)
14137 struct remote_state *rs = get_remote_state ();
14138 size_t size = get_remote_packet_size ();
14140 if (packet_support (PACKET_QThreadEvents) == PACKET_DISABLE)
14143 xsnprintf (rs->buf, size, "QThreadEvents:%x", enable ? 1 : 0);
14145 getpkt (&rs->buf, &rs->buf_size, 0);
14147 switch (packet_ok (rs->buf,
14148 &remote_protocol_packets[PACKET_QThreadEvents]))
14151 if (strcmp (rs->buf, "OK") != 0)
14152 error (_("Remote refused setting thread events: %s"), rs->buf);
14155 warning (_("Remote failure reply: %s"), rs->buf);
14157 case PACKET_UNKNOWN:
14163 set_remote_cmd (const char *args, int from_tty)
14165 help_list (remote_set_cmdlist, "set remote ", all_commands, gdb_stdout);
14169 show_remote_cmd (const char *args, int from_tty)
14171 /* We can't just use cmd_show_list here, because we want to skip
14172 the redundant "show remote Z-packet" and the legacy aliases. */
14173 struct cmd_list_element *list = remote_show_cmdlist;
14174 struct ui_out *uiout = current_uiout;
14176 ui_out_emit_tuple tuple_emitter (uiout, "showlist");
14177 for (; list != NULL; list = list->next)
14178 if (strcmp (list->name, "Z-packet") == 0)
14180 else if (list->type == not_set_cmd)
14181 /* Alias commands are exactly like the original, except they
14182 don't have the normal type. */
14186 ui_out_emit_tuple option_emitter (uiout, "option");
14188 uiout->field_string ("name", list->name);
14189 uiout->text (": ");
14190 if (list->type == show_cmd)
14191 do_show_command (NULL, from_tty, list);
14193 cmd_func (list, NULL, from_tty);
14198 /* Function to be called whenever a new objfile (shlib) is detected. */
14200 remote_new_objfile (struct objfile *objfile)
14202 remote_target *remote = get_current_remote_target ();
14204 if (remote != NULL) /* Have a remote connection. */
14205 remote->remote_check_symbols ();
14208 /* Pull all the tracepoints defined on the target and create local
14209 data structures representing them. We don't want to create real
14210 tracepoints yet, we don't want to mess up the user's existing
14214 remote_target::upload_tracepoints (struct uploaded_tp **utpp)
14216 struct remote_state *rs = get_remote_state ();
14219 /* Ask for a first packet of tracepoint definition. */
14221 getpkt (&rs->buf, &rs->buf_size, 0);
14223 while (*p && *p != 'l')
14225 parse_tracepoint_definition (p, utpp);
14226 /* Ask for another packet of tracepoint definition. */
14228 getpkt (&rs->buf, &rs->buf_size, 0);
14235 remote_target::upload_trace_state_variables (struct uploaded_tsv **utsvp)
14237 struct remote_state *rs = get_remote_state ();
14240 /* Ask for a first packet of variable definition. */
14242 getpkt (&rs->buf, &rs->buf_size, 0);
14244 while (*p && *p != 'l')
14246 parse_tsv_definition (p, utsvp);
14247 /* Ask for another packet of variable definition. */
14249 getpkt (&rs->buf, &rs->buf_size, 0);
14255 /* The "set/show range-stepping" show hook. */
14258 show_range_stepping (struct ui_file *file, int from_tty,
14259 struct cmd_list_element *c,
14262 fprintf_filtered (file,
14263 _("Debugger's willingness to use range stepping "
14264 "is %s.\n"), value);
14267 /* Return true if the vCont;r action is supported by the remote
14271 remote_target::vcont_r_supported ()
14273 if (packet_support (PACKET_vCont) == PACKET_SUPPORT_UNKNOWN)
14274 remote_vcont_probe ();
14276 return (packet_support (PACKET_vCont) == PACKET_ENABLE
14277 && get_remote_state ()->supports_vCont.r);
14280 /* The "set/show range-stepping" set hook. */
14283 set_range_stepping (const char *ignore_args, int from_tty,
14284 struct cmd_list_element *c)
14286 /* When enabling, check whether range stepping is actually supported
14287 by the target, and warn if not. */
14288 if (use_range_stepping)
14290 remote_target *remote = get_current_remote_target ();
14292 || !remote->vcont_r_supported ())
14293 warning (_("Range stepping is not supported by the current target"));
14298 _initialize_remote (void)
14300 struct cmd_list_element *cmd;
14301 const char *cmd_name;
14303 /* architecture specific data */
14304 remote_g_packet_data_handle =
14305 gdbarch_data_register_pre_init (remote_g_packet_data_init);
14308 = register_program_space_data_with_cleanup (NULL,
14309 remote_pspace_data_cleanup);
14311 add_target (remote_target_info, remote_target::open);
14312 add_target (extended_remote_target_info, extended_remote_target::open);
14314 /* Hook into new objfile notification. */
14315 gdb::observers::new_objfile.attach (remote_new_objfile);
14318 init_remote_threadtests ();
14321 /* set/show remote ... */
14323 add_prefix_cmd ("remote", class_maintenance, set_remote_cmd, _("\
14324 Remote protocol specific variables\n\
14325 Configure various remote-protocol specific variables such as\n\
14326 the packets being used"),
14327 &remote_set_cmdlist, "set remote ",
14328 0 /* allow-unknown */, &setlist);
14329 add_prefix_cmd ("remote", class_maintenance, show_remote_cmd, _("\
14330 Remote protocol specific variables\n\
14331 Configure various remote-protocol specific variables such as\n\
14332 the packets being used"),
14333 &remote_show_cmdlist, "show remote ",
14334 0 /* allow-unknown */, &showlist);
14336 add_cmd ("compare-sections", class_obscure, compare_sections_command, _("\
14337 Compare section data on target to the exec file.\n\
14338 Argument is a single section name (default: all loaded sections).\n\
14339 To compare only read-only loaded sections, specify the -r option."),
14342 add_cmd ("packet", class_maintenance, packet_command, _("\
14343 Send an arbitrary packet to a remote target.\n\
14344 maintenance packet TEXT\n\
14345 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14346 this command sends the string TEXT to the inferior, and displays the\n\
14347 response packet. GDB supplies the initial `$' character, and the\n\
14348 terminating `#' character and checksum."),
14351 add_setshow_boolean_cmd ("remotebreak", no_class, &remote_break, _("\
14352 Set whether to send break if interrupted."), _("\
14353 Show whether to send break if interrupted."), _("\
14354 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14355 set_remotebreak, show_remotebreak,
14356 &setlist, &showlist);
14357 cmd_name = "remotebreak";
14358 cmd = lookup_cmd (&cmd_name, setlist, "", -1, 1);
14359 deprecate_cmd (cmd, "set remote interrupt-sequence");
14360 cmd_name = "remotebreak"; /* needed because lookup_cmd updates the pointer */
14361 cmd = lookup_cmd (&cmd_name, showlist, "", -1, 1);
14362 deprecate_cmd (cmd, "show remote interrupt-sequence");
14364 add_setshow_enum_cmd ("interrupt-sequence", class_support,
14365 interrupt_sequence_modes, &interrupt_sequence_mode,
14367 Set interrupt sequence to remote target."), _("\
14368 Show interrupt sequence to remote target."), _("\
14369 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14370 NULL, show_interrupt_sequence,
14371 &remote_set_cmdlist,
14372 &remote_show_cmdlist);
14374 add_setshow_boolean_cmd ("interrupt-on-connect", class_support,
14375 &interrupt_on_connect, _("\
14376 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14377 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14378 If set, interrupt sequence is sent to remote target."),
14380 &remote_set_cmdlist, &remote_show_cmdlist);
14382 /* Install commands for configuring memory read/write packets. */
14384 add_cmd ("remotewritesize", no_class, set_memory_write_packet_size, _("\
14385 Set the maximum number of bytes per memory write packet (deprecated)."),
14387 add_cmd ("remotewritesize", no_class, show_memory_write_packet_size, _("\
14388 Show the maximum number of bytes per memory write packet (deprecated)."),
14390 add_cmd ("memory-write-packet-size", no_class,
14391 set_memory_write_packet_size, _("\
14392 Set the maximum number of bytes per memory-write packet.\n\
14393 Specify the number of bytes in a packet or 0 (zero) for the\n\
14394 default packet size. The actual limit is further reduced\n\
14395 dependent on the target. Specify ``fixed'' to disable the\n\
14396 further restriction and ``limit'' to enable that restriction."),
14397 &remote_set_cmdlist);
14398 add_cmd ("memory-read-packet-size", no_class,
14399 set_memory_read_packet_size, _("\
14400 Set the maximum number of bytes per memory-read packet.\n\
14401 Specify the number of bytes in a packet or 0 (zero) for the\n\
14402 default packet size. The actual limit is further reduced\n\
14403 dependent on the target. Specify ``fixed'' to disable the\n\
14404 further restriction and ``limit'' to enable that restriction."),
14405 &remote_set_cmdlist);
14406 add_cmd ("memory-write-packet-size", no_class,
14407 show_memory_write_packet_size,
14408 _("Show the maximum number of bytes per memory-write packet."),
14409 &remote_show_cmdlist);
14410 add_cmd ("memory-read-packet-size", no_class,
14411 show_memory_read_packet_size,
14412 _("Show the maximum number of bytes per memory-read packet."),
14413 &remote_show_cmdlist);
14415 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class,
14416 &remote_hw_watchpoint_limit, _("\
14417 Set the maximum number of target hardware watchpoints."), _("\
14418 Show the maximum number of target hardware watchpoints."), _("\
14419 Specify \"unlimited\" for unlimited hardware watchpoints."),
14420 NULL, show_hardware_watchpoint_limit,
14421 &remote_set_cmdlist,
14422 &remote_show_cmdlist);
14423 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14425 &remote_hw_watchpoint_length_limit, _("\
14426 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14427 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14428 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14429 NULL, show_hardware_watchpoint_length_limit,
14430 &remote_set_cmdlist, &remote_show_cmdlist);
14431 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class,
14432 &remote_hw_breakpoint_limit, _("\
14433 Set the maximum number of target hardware breakpoints."), _("\
14434 Show the maximum number of target hardware breakpoints."), _("\
14435 Specify \"unlimited\" for unlimited hardware breakpoints."),
14436 NULL, show_hardware_breakpoint_limit,
14437 &remote_set_cmdlist, &remote_show_cmdlist);
14439 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure,
14440 &remote_address_size, _("\
14441 Set the maximum size of the address (in bits) in a memory packet."), _("\
14442 Show the maximum size of the address (in bits) in a memory packet."), NULL,
14444 NULL, /* FIXME: i18n: */
14445 &setlist, &showlist);
14447 init_all_packet_configs ();
14449 add_packet_config_cmd (&remote_protocol_packets[PACKET_X],
14450 "X", "binary-download", 1);
14452 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCont],
14453 "vCont", "verbose-resume", 0);
14455 add_packet_config_cmd (&remote_protocol_packets[PACKET_QPassSignals],
14456 "QPassSignals", "pass-signals", 0);
14458 add_packet_config_cmd (&remote_protocol_packets[PACKET_QCatchSyscalls],
14459 "QCatchSyscalls", "catch-syscalls", 0);
14461 add_packet_config_cmd (&remote_protocol_packets[PACKET_QProgramSignals],
14462 "QProgramSignals", "program-signals", 0);
14464 add_packet_config_cmd (&remote_protocol_packets[PACKET_QSetWorkingDir],
14465 "QSetWorkingDir", "set-working-dir", 0);
14467 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartupWithShell],
14468 "QStartupWithShell", "startup-with-shell", 0);
14470 add_packet_config_cmd (&remote_protocol_packets
14471 [PACKET_QEnvironmentHexEncoded],
14472 "QEnvironmentHexEncoded", "environment-hex-encoded",
14475 add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentReset],
14476 "QEnvironmentReset", "environment-reset",
14479 add_packet_config_cmd (&remote_protocol_packets[PACKET_QEnvironmentUnset],
14480 "QEnvironmentUnset", "environment-unset",
14483 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSymbol],
14484 "qSymbol", "symbol-lookup", 0);
14486 add_packet_config_cmd (&remote_protocol_packets[PACKET_P],
14487 "P", "set-register", 1);
14489 add_packet_config_cmd (&remote_protocol_packets[PACKET_p],
14490 "p", "fetch-register", 1);
14492 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z0],
14493 "Z0", "software-breakpoint", 0);
14495 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z1],
14496 "Z1", "hardware-breakpoint", 0);
14498 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z2],
14499 "Z2", "write-watchpoint", 0);
14501 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z3],
14502 "Z3", "read-watchpoint", 0);
14504 add_packet_config_cmd (&remote_protocol_packets[PACKET_Z4],
14505 "Z4", "access-watchpoint", 0);
14507 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_auxv],
14508 "qXfer:auxv:read", "read-aux-vector", 0);
14510 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_exec_file],
14511 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14513 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_features],
14514 "qXfer:features:read", "target-features", 0);
14516 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries],
14517 "qXfer:libraries:read", "library-info", 0);
14519 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_libraries_svr4],
14520 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14522 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_memory_map],
14523 "qXfer:memory-map:read", "memory-map", 0);
14525 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_read],
14526 "qXfer:spu:read", "read-spu-object", 0);
14528 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_spu_write],
14529 "qXfer:spu:write", "write-spu-object", 0);
14531 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_osdata],
14532 "qXfer:osdata:read", "osdata", 0);
14534 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_threads],
14535 "qXfer:threads:read", "threads", 0);
14537 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_read],
14538 "qXfer:siginfo:read", "read-siginfo-object", 0);
14540 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_siginfo_write],
14541 "qXfer:siginfo:write", "write-siginfo-object", 0);
14543 add_packet_config_cmd
14544 (&remote_protocol_packets[PACKET_qXfer_traceframe_info],
14545 "qXfer:traceframe-info:read", "traceframe-info", 0);
14547 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_uib],
14548 "qXfer:uib:read", "unwind-info-block", 0);
14550 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTLSAddr],
14551 "qGetTLSAddr", "get-thread-local-storage-address",
14554 add_packet_config_cmd (&remote_protocol_packets[PACKET_qGetTIBAddr],
14555 "qGetTIBAddr", "get-thread-information-block-address",
14558 add_packet_config_cmd (&remote_protocol_packets[PACKET_bc],
14559 "bc", "reverse-continue", 0);
14561 add_packet_config_cmd (&remote_protocol_packets[PACKET_bs],
14562 "bs", "reverse-step", 0);
14564 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSupported],
14565 "qSupported", "supported-packets", 0);
14567 add_packet_config_cmd (&remote_protocol_packets[PACKET_qSearch_memory],
14568 "qSearch:memory", "search-memory", 0);
14570 add_packet_config_cmd (&remote_protocol_packets[PACKET_qTStatus],
14571 "qTStatus", "trace-status", 0);
14573 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_setfs],
14574 "vFile:setfs", "hostio-setfs", 0);
14576 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_open],
14577 "vFile:open", "hostio-open", 0);
14579 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pread],
14580 "vFile:pread", "hostio-pread", 0);
14582 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_pwrite],
14583 "vFile:pwrite", "hostio-pwrite", 0);
14585 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_close],
14586 "vFile:close", "hostio-close", 0);
14588 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_unlink],
14589 "vFile:unlink", "hostio-unlink", 0);
14591 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_readlink],
14592 "vFile:readlink", "hostio-readlink", 0);
14594 add_packet_config_cmd (&remote_protocol_packets[PACKET_vFile_fstat],
14595 "vFile:fstat", "hostio-fstat", 0);
14597 add_packet_config_cmd (&remote_protocol_packets[PACKET_vAttach],
14598 "vAttach", "attach", 0);
14600 add_packet_config_cmd (&remote_protocol_packets[PACKET_vRun],
14603 add_packet_config_cmd (&remote_protocol_packets[PACKET_QStartNoAckMode],
14604 "QStartNoAckMode", "noack", 0);
14606 add_packet_config_cmd (&remote_protocol_packets[PACKET_vKill],
14607 "vKill", "kill", 0);
14609 add_packet_config_cmd (&remote_protocol_packets[PACKET_qAttached],
14610 "qAttached", "query-attached", 0);
14612 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalTracepoints],
14613 "ConditionalTracepoints",
14614 "conditional-tracepoints", 0);
14616 add_packet_config_cmd (&remote_protocol_packets[PACKET_ConditionalBreakpoints],
14617 "ConditionalBreakpoints",
14618 "conditional-breakpoints", 0);
14620 add_packet_config_cmd (&remote_protocol_packets[PACKET_BreakpointCommands],
14621 "BreakpointCommands",
14622 "breakpoint-commands", 0);
14624 add_packet_config_cmd (&remote_protocol_packets[PACKET_FastTracepoints],
14625 "FastTracepoints", "fast-tracepoints", 0);
14627 add_packet_config_cmd (&remote_protocol_packets[PACKET_TracepointSource],
14628 "TracepointSource", "TracepointSource", 0);
14630 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAllow],
14631 "QAllow", "allow", 0);
14633 add_packet_config_cmd (&remote_protocol_packets[PACKET_StaticTracepoints],
14634 "StaticTracepoints", "static-tracepoints", 0);
14636 add_packet_config_cmd (&remote_protocol_packets[PACKET_InstallInTrace],
14637 "InstallInTrace", "install-in-trace", 0);
14639 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_statictrace_read],
14640 "qXfer:statictrace:read", "read-sdata-object", 0);
14642 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_fdpic],
14643 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14645 add_packet_config_cmd (&remote_protocol_packets[PACKET_QDisableRandomization],
14646 "QDisableRandomization", "disable-randomization", 0);
14648 add_packet_config_cmd (&remote_protocol_packets[PACKET_QAgent],
14649 "QAgent", "agent", 0);
14651 add_packet_config_cmd (&remote_protocol_packets[PACKET_QTBuffer_size],
14652 "QTBuffer:size", "trace-buffer-size", 0);
14654 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_off],
14655 "Qbtrace:off", "disable-btrace", 0);
14657 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_bts],
14658 "Qbtrace:bts", "enable-btrace-bts", 0);
14660 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_pt],
14661 "Qbtrace:pt", "enable-btrace-pt", 0);
14663 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace],
14664 "qXfer:btrace", "read-btrace", 0);
14666 add_packet_config_cmd (&remote_protocol_packets[PACKET_qXfer_btrace_conf],
14667 "qXfer:btrace-conf", "read-btrace-conf", 0);
14669 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_bts_size],
14670 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14672 add_packet_config_cmd (&remote_protocol_packets[PACKET_multiprocess_feature],
14673 "multiprocess-feature", "multiprocess-feature", 0);
14675 add_packet_config_cmd (&remote_protocol_packets[PACKET_swbreak_feature],
14676 "swbreak-feature", "swbreak-feature", 0);
14678 add_packet_config_cmd (&remote_protocol_packets[PACKET_hwbreak_feature],
14679 "hwbreak-feature", "hwbreak-feature", 0);
14681 add_packet_config_cmd (&remote_protocol_packets[PACKET_fork_event_feature],
14682 "fork-event-feature", "fork-event-feature", 0);
14684 add_packet_config_cmd (&remote_protocol_packets[PACKET_vfork_event_feature],
14685 "vfork-event-feature", "vfork-event-feature", 0);
14687 add_packet_config_cmd (&remote_protocol_packets[PACKET_Qbtrace_conf_pt_size],
14688 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14690 add_packet_config_cmd (&remote_protocol_packets[PACKET_vContSupported],
14691 "vContSupported", "verbose-resume-supported", 0);
14693 add_packet_config_cmd (&remote_protocol_packets[PACKET_exec_event_feature],
14694 "exec-event-feature", "exec-event-feature", 0);
14696 add_packet_config_cmd (&remote_protocol_packets[PACKET_vCtrlC],
14697 "vCtrlC", "ctrl-c", 0);
14699 add_packet_config_cmd (&remote_protocol_packets[PACKET_QThreadEvents],
14700 "QThreadEvents", "thread-events", 0);
14702 add_packet_config_cmd (&remote_protocol_packets[PACKET_no_resumed],
14703 "N stop reply", "no-resumed-stop-reply", 0);
14705 /* Assert that we've registered "set remote foo-packet" commands
14706 for all packet configs. */
14710 for (i = 0; i < PACKET_MAX; i++)
14712 /* Ideally all configs would have a command associated. Some
14713 still don't though. */
14718 case PACKET_QNonStop:
14719 case PACKET_EnableDisableTracepoints_feature:
14720 case PACKET_tracenz_feature:
14721 case PACKET_DisconnectedTracing_feature:
14722 case PACKET_augmented_libraries_svr4_read_feature:
14724 /* Additions to this list need to be well justified:
14725 pre-existing packets are OK; new packets are not. */
14733 /* This catches both forgetting to add a config command, and
14734 forgetting to remove a packet from the exception list. */
14735 gdb_assert (excepted == (remote_protocol_packets[i].name == NULL));
14739 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14740 Z sub-packet has its own set and show commands, but users may
14741 have sets to this variable in their .gdbinit files (or in their
14743 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure,
14744 &remote_Z_packet_detect, _("\
14745 Set use of remote protocol `Z' packets"), _("\
14746 Show use of remote protocol `Z' packets "), _("\
14747 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14749 set_remote_protocol_Z_packet_cmd,
14750 show_remote_protocol_Z_packet_cmd,
14751 /* FIXME: i18n: Use of remote protocol
14752 `Z' packets is %s. */
14753 &remote_set_cmdlist, &remote_show_cmdlist);
14755 add_prefix_cmd ("remote", class_files, remote_command, _("\
14756 Manipulate files on the remote system\n\
14757 Transfer files to and from the remote target system."),
14758 &remote_cmdlist, "remote ",
14759 0 /* allow-unknown */, &cmdlist);
14761 add_cmd ("put", class_files, remote_put_command,
14762 _("Copy a local file to the remote system."),
14765 add_cmd ("get", class_files, remote_get_command,
14766 _("Copy a remote file to the local system."),
14769 add_cmd ("delete", class_files, remote_delete_command,
14770 _("Delete a remote file."),
14773 add_setshow_string_noescape_cmd ("exec-file", class_files,
14774 &remote_exec_file_var, _("\
14775 Set the remote pathname for \"run\""), _("\
14776 Show the remote pathname for \"run\""), NULL,
14777 set_remote_exec_file,
14778 show_remote_exec_file,
14779 &remote_set_cmdlist,
14780 &remote_show_cmdlist);
14782 add_setshow_boolean_cmd ("range-stepping", class_run,
14783 &use_range_stepping, _("\
14784 Enable or disable range stepping."), _("\
14785 Show whether target-assisted range stepping is enabled."), _("\
14786 If on, and the target supports it, when stepping a source line, GDB\n\
14787 tells the target to step the corresponding range of addresses itself instead\n\
14788 of issuing multiple single-steps. This speeds up source level\n\
14789 stepping. If off, GDB always issues single-steps, even if range\n\
14790 stepping is supported by the target. The default is on."),
14791 set_range_stepping,
14792 show_range_stepping,
14796 /* Eventually initialize fileio. See fileio.c */
14797 initialize_remote_fileio (remote_set_cmdlist, remote_show_cmdlist);
14799 /* Take advantage of the fact that the TID field is not used, to tag
14800 special ptids with it set to != 0. */
14801 magic_null_ptid = ptid_t (42000, -1, 1);
14802 not_sent_ptid = ptid_t (42000, -2, 1);
14803 any_thread_ptid = ptid_t (42000, 0, 1);