1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2020 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
30 #include "process-stratum-target.h"
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
39 #include "observable.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "gdbsupport/filestuff.h"
46 #include "gdbsupport/rsp-low.h"
50 #include "gdbsupport/gdb_sys_time.h"
52 #include "gdbsupport/event-loop.h"
53 #include "event-top.h"
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
71 #include "gdbsupport/agent.h"
73 #include "record-btrace.h"
75 #include "gdbsupport/scoped_restore.h"
76 #include "gdbsupport/environ.h"
77 #include "gdbsupport/byte-vector.h"
78 #include "gdbsupport/search.h"
80 #include <unordered_map>
81 #include "async-event.h"
83 /* The remote target. */
85 static const char remote_doc
[] = N_("\
86 Use a remote computer via a serial line, using a gdb-specific protocol.\n\
87 Specify the serial device it is connected to\n\
88 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
90 #define OPAQUETHREADBYTES 8
92 /* a 64 bit opaque identifier */
93 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
95 struct gdb_ext_thread_info
;
96 struct threads_listing_context
;
97 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
98 struct protocol_feature
;
102 typedef std::unique_ptr
<stop_reply
> stop_reply_up
;
104 /* Generic configuration support for packets the stub optionally
105 supports. Allows the user to specify the use of the packet as well
106 as allowing GDB to auto-detect support in the remote stub. */
110 PACKET_SUPPORT_UNKNOWN
= 0,
115 /* Analyze a packet's return value and update the packet config
125 struct threads_listing_context
;
127 /* Stub vCont actions support.
129 Each field is a boolean flag indicating whether the stub reports
130 support for the corresponding action. */
132 struct vCont_action_support
147 /* About this many threadids fit in a packet. */
149 #define MAXTHREADLISTRESULTS 32
151 /* Data for the vFile:pread readahead cache. */
153 struct readahead_cache
155 /* Invalidate the readahead cache. */
158 /* Invalidate the readahead cache if it is holding data for FD. */
159 void invalidate_fd (int fd
);
161 /* Serve pread from the readahead cache. Returns number of bytes
162 read, or 0 if the request can't be served from the cache. */
163 int pread (int fd
, gdb_byte
*read_buf
, size_t len
, ULONGEST offset
);
165 /* The file descriptor for the file that is being cached. -1 if the
169 /* The offset into the file that the cache buffer corresponds
173 /* The buffer holding the cache contents. */
174 gdb_byte
*buf
= nullptr;
175 /* The buffer's size. We try to read as much as fits into a packet
179 /* Cache hit and miss counters. */
180 ULONGEST hit_count
= 0;
181 ULONGEST miss_count
= 0;
184 /* Description of the remote protocol for a given architecture. */
188 long offset
; /* Offset into G packet. */
189 long regnum
; /* GDB's internal register number. */
190 LONGEST pnum
; /* Remote protocol register number. */
191 int in_g_packet
; /* Always part of G packet. */
192 /* long size in bytes; == register_size (target_gdbarch (), regnum);
194 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
198 struct remote_arch_state
200 explicit remote_arch_state (struct gdbarch
*gdbarch
);
202 /* Description of the remote protocol registers. */
203 long sizeof_g_packet
;
205 /* Description of the remote protocol registers indexed by REGNUM
206 (making an array gdbarch_num_regs in size). */
207 std::unique_ptr
<packet_reg
[]> regs
;
209 /* This is the size (in chars) of the first response to the ``g''
210 packet. It is used as a heuristic when determining the maximum
211 size of memory-read and memory-write packets. A target will
212 typically only reserve a buffer large enough to hold the ``g''
213 packet. The size does not include packet overhead (headers and
215 long actual_register_packet_size
;
217 /* This is the maximum size (in chars) of a non read/write packet.
218 It is also used as a cap on the size of read/write packets. */
219 long remote_packet_size
;
222 /* Description of the remote protocol state for the currently
223 connected target. This is per-target state, and independent of the
224 selected architecture. */
233 /* Get the remote arch state for GDBARCH. */
234 struct remote_arch_state
*get_remote_arch_state (struct gdbarch
*gdbarch
);
238 /* A buffer to use for incoming packets, and its current size. The
239 buffer is grown dynamically for larger incoming packets.
240 Outgoing packets may also be constructed in this buffer.
241 The size of the buffer is always at least REMOTE_PACKET_SIZE;
242 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
244 gdb::char_vector buf
;
246 /* True if we're going through initial connection setup (finding out
247 about the remote side's threads, relocating symbols, etc.). */
248 bool starting_up
= false;
250 /* If we negotiated packet size explicitly (and thus can bypass
251 heuristics for the largest packet size that will not overflow
252 a buffer in the stub), this will be set to that packet size.
253 Otherwise zero, meaning to use the guessed size. */
254 long explicit_packet_size
= 0;
256 /* remote_wait is normally called when the target is running and
257 waits for a stop reply packet. But sometimes we need to call it
258 when the target is already stopped. We can send a "?" packet
259 and have remote_wait read the response. Or, if we already have
260 the response, we can stash it in BUF and tell remote_wait to
261 skip calling getpkt. This flag is set when BUF contains a
262 stop reply packet and the target is not waiting. */
263 int cached_wait_status
= 0;
265 /* True, if in no ack mode. That is, neither GDB nor the stub will
266 expect acks from each other. The connection is assumed to be
268 bool noack_mode
= false;
270 /* True if we're connected in extended remote mode. */
271 bool extended
= false;
273 /* True if we resumed the target and we're waiting for the target to
274 stop. In the mean time, we can't start another command/query.
275 The remote server wouldn't be ready to process it, so we'd
276 timeout waiting for a reply that would never come and eventually
277 we'd close the connection. This can happen in asynchronous mode
278 because we allow GDB commands while the target is running. */
279 bool waiting_for_stop_reply
= false;
281 /* The status of the stub support for the various vCont actions. */
282 vCont_action_support supports_vCont
;
283 /* Whether vCont support was probed already. This is a workaround
284 until packet_support is per-connection. */
285 bool supports_vCont_probed
;
287 /* True if the user has pressed Ctrl-C, but the target hasn't
288 responded to that. */
289 bool ctrlc_pending_p
= false;
291 /* True if we saw a Ctrl-C while reading or writing from/to the
292 remote descriptor. At that point it is not safe to send a remote
293 interrupt packet, so we instead remember we saw the Ctrl-C and
294 process it once we're done with sending/receiving the current
295 packet, which should be shortly. If however that takes too long,
296 and the user presses Ctrl-C again, we offer to disconnect. */
297 bool got_ctrlc_during_io
= false;
299 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
300 remote_open knows that we don't have a file open when the program
302 struct serial
*remote_desc
= nullptr;
304 /* These are the threads which we last sent to the remote system. The
305 TID member will be -1 for all or -2 for not sent yet. */
306 ptid_t general_thread
= null_ptid
;
307 ptid_t continue_thread
= null_ptid
;
309 /* This is the traceframe which we last selected on the remote system.
310 It will be -1 if no traceframe is selected. */
311 int remote_traceframe_number
= -1;
313 char *last_pass_packet
= nullptr;
315 /* The last QProgramSignals packet sent to the target. We bypass
316 sending a new program signals list down to the target if the new
317 packet is exactly the same as the last we sent. IOW, we only let
318 the target know about program signals list changes. */
319 char *last_program_signals_packet
= nullptr;
321 gdb_signal last_sent_signal
= GDB_SIGNAL_0
;
323 bool last_sent_step
= false;
325 /* The execution direction of the last resume we got. */
326 exec_direction_kind last_resume_exec_dir
= EXEC_FORWARD
;
328 char *finished_object
= nullptr;
329 char *finished_annex
= nullptr;
330 ULONGEST finished_offset
= 0;
332 /* Should we try the 'ThreadInfo' query packet?
334 This variable (NOT available to the user: auto-detect only!)
335 determines whether GDB will use the new, simpler "ThreadInfo"
336 query or the older, more complex syntax for thread queries.
337 This is an auto-detect variable (set to true at each connect,
338 and set to false when the target fails to recognize it). */
339 bool use_threadinfo_query
= false;
340 bool use_threadextra_query
= false;
342 threadref echo_nextthread
{};
343 threadref nextthread
{};
344 threadref resultthreadlist
[MAXTHREADLISTRESULTS
] {};
346 /* The state of remote notification. */
347 struct remote_notif_state
*notif_state
= nullptr;
349 /* The branch trace configuration. */
350 struct btrace_config btrace_config
{};
352 /* The argument to the last "vFile:setfs:" packet we sent, used
353 to avoid sending repeated unnecessary "vFile:setfs:" packets.
354 Initialized to -1 to indicate that no "vFile:setfs:" packet
355 has yet been sent. */
358 /* A readahead cache for vFile:pread. Often, reading a binary
359 involves a sequence of small reads. E.g., when parsing an ELF
360 file. A readahead cache helps mostly the case of remote
361 debugging on a connection with higher latency, due to the
362 request/reply nature of the RSP. We only cache data for a single
363 file descriptor at a time. */
364 struct readahead_cache readahead_cache
;
366 /* The list of already fetched and acknowledged stop events. This
367 queue is used for notification Stop, and other notifications
368 don't need queue for their events, because the notification
369 events of Stop can't be consumed immediately, so that events
370 should be queued first, and be consumed by remote_wait_{ns,as}
371 one per time. Other notifications can consume their events
372 immediately, so queue is not needed for them. */
373 std::vector
<stop_reply_up
> stop_reply_queue
;
375 /* Asynchronous signal handle registered as event loop source for
376 when we have pending events ready to be passed to the core. */
377 struct async_event_handler
*remote_async_inferior_event_token
= nullptr;
379 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
380 ``forever'' still use the normal timeout mechanism. This is
381 currently used by the ASYNC code to guarentee that target reads
382 during the initial connect always time-out. Once getpkt has been
383 modified to return a timeout indication and, in turn
384 remote_wait()/wait_for_inferior() have gained a timeout parameter
386 int wait_forever_enabled_p
= 1;
389 /* Mapping of remote protocol data for each gdbarch. Usually there
390 is only one entry here, though we may see more with stubs that
391 support multi-process. */
392 std::unordered_map
<struct gdbarch
*, remote_arch_state
>
396 static const target_info remote_target_info
= {
398 N_("Remote serial target in gdb-specific protocol"),
402 class remote_target
: public process_stratum_target
405 remote_target () = default;
406 ~remote_target () override
;
408 const target_info
&info () const override
409 { return remote_target_info
; }
411 const char *connection_string () override
;
413 thread_control_capabilities
get_thread_control_capabilities () override
414 { return tc_schedlock
; }
416 /* Open a remote connection. */
417 static void open (const char *, int);
419 void close () override
;
421 void detach (inferior
*, int) override
;
422 void disconnect (const char *, int) override
;
424 void commit_resume () override
;
425 void resume (ptid_t
, int, enum gdb_signal
) override
;
426 ptid_t
wait (ptid_t
, struct target_waitstatus
*, target_wait_flags
) override
;
428 void fetch_registers (struct regcache
*, int) override
;
429 void store_registers (struct regcache
*, int) override
;
430 void prepare_to_store (struct regcache
*) override
;
432 void files_info () override
;
434 int insert_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
436 int remove_breakpoint (struct gdbarch
*, struct bp_target_info
*,
437 enum remove_bp_reason
) override
;
440 bool stopped_by_sw_breakpoint () override
;
441 bool supports_stopped_by_sw_breakpoint () override
;
443 bool stopped_by_hw_breakpoint () override
;
445 bool supports_stopped_by_hw_breakpoint () override
;
447 bool stopped_by_watchpoint () override
;
449 bool stopped_data_address (CORE_ADDR
*) override
;
451 bool watchpoint_addr_within_range (CORE_ADDR
, CORE_ADDR
, int) override
;
453 int can_use_hw_breakpoint (enum bptype
, int, int) override
;
455 int insert_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
457 int remove_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
459 int region_ok_for_hw_watchpoint (CORE_ADDR
, int) override
;
461 int insert_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
462 struct expression
*) override
;
464 int remove_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
465 struct expression
*) override
;
467 void kill () override
;
469 void load (const char *, int) override
;
471 void mourn_inferior () override
;
473 void pass_signals (gdb::array_view
<const unsigned char>) override
;
475 int set_syscall_catchpoint (int, bool, int,
476 gdb::array_view
<const int>) override
;
478 void program_signals (gdb::array_view
<const unsigned char>) override
;
480 bool thread_alive (ptid_t ptid
) override
;
482 const char *thread_name (struct thread_info
*) override
;
484 void update_thread_list () override
;
486 std::string
pid_to_str (ptid_t
) override
;
488 const char *extra_thread_info (struct thread_info
*) override
;
490 ptid_t
get_ada_task_ptid (long lwp
, long thread
) override
;
492 thread_info
*thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
494 inferior
*inf
) override
;
496 gdb::byte_vector
thread_info_to_thread_handle (struct thread_info
*tp
)
499 void stop (ptid_t
) override
;
501 void interrupt () override
;
503 void pass_ctrlc () override
;
505 enum target_xfer_status
xfer_partial (enum target_object object
,
508 const gdb_byte
*writebuf
,
509 ULONGEST offset
, ULONGEST len
,
510 ULONGEST
*xfered_len
) override
;
512 ULONGEST
get_memory_xfer_limit () override
;
514 void rcmd (const char *command
, struct ui_file
*output
) override
;
516 char *pid_to_exec_file (int pid
) override
;
518 void log_command (const char *cmd
) override
520 serial_log_command (this, cmd
);
523 CORE_ADDR
get_thread_local_address (ptid_t ptid
,
524 CORE_ADDR load_module_addr
,
525 CORE_ADDR offset
) override
;
527 bool can_execute_reverse () override
;
529 std::vector
<mem_region
> memory_map () override
;
531 void flash_erase (ULONGEST address
, LONGEST length
) override
;
533 void flash_done () override
;
535 const struct target_desc
*read_description () override
;
537 int search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
538 const gdb_byte
*pattern
, ULONGEST pattern_len
,
539 CORE_ADDR
*found_addrp
) override
;
541 bool can_async_p () override
;
543 bool is_async_p () override
;
545 void async (int) override
;
547 int async_wait_fd () override
;
549 void thread_events (int) override
;
551 int can_do_single_step () override
;
553 void terminal_inferior () override
;
555 void terminal_ours () override
;
557 bool supports_non_stop () override
;
559 bool supports_multi_process () override
;
561 bool supports_disable_randomization () override
;
563 bool filesystem_is_local () override
;
566 int fileio_open (struct inferior
*inf
, const char *filename
,
567 int flags
, int mode
, int warn_if_slow
,
568 int *target_errno
) override
;
570 int fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
571 ULONGEST offset
, int *target_errno
) override
;
573 int fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
574 ULONGEST offset
, int *target_errno
) override
;
576 int fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
) override
;
578 int fileio_close (int fd
, int *target_errno
) override
;
580 int fileio_unlink (struct inferior
*inf
,
581 const char *filename
,
582 int *target_errno
) override
;
584 gdb::optional
<std::string
>
585 fileio_readlink (struct inferior
*inf
,
586 const char *filename
,
587 int *target_errno
) override
;
589 bool supports_enable_disable_tracepoint () override
;
591 bool supports_string_tracing () override
;
593 bool supports_evaluation_of_breakpoint_conditions () override
;
595 bool can_run_breakpoint_commands () override
;
597 void trace_init () override
;
599 void download_tracepoint (struct bp_location
*location
) override
;
601 bool can_download_tracepoint () override
;
603 void download_trace_state_variable (const trace_state_variable
&tsv
) override
;
605 void enable_tracepoint (struct bp_location
*location
) override
;
607 void disable_tracepoint (struct bp_location
*location
) override
;
609 void trace_set_readonly_regions () override
;
611 void trace_start () override
;
613 int get_trace_status (struct trace_status
*ts
) override
;
615 void get_tracepoint_status (struct breakpoint
*tp
, struct uploaded_tp
*utp
)
618 void trace_stop () override
;
620 int trace_find (enum trace_find_type type
, int num
,
621 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
) override
;
623 bool get_trace_state_variable_value (int tsv
, LONGEST
*val
) override
;
625 int save_trace_data (const char *filename
) override
;
627 int upload_tracepoints (struct uploaded_tp
**utpp
) override
;
629 int upload_trace_state_variables (struct uploaded_tsv
**utsvp
) override
;
631 LONGEST
get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
) override
;
633 int get_min_fast_tracepoint_insn_len () override
;
635 void set_disconnected_tracing (int val
) override
;
637 void set_circular_trace_buffer (int val
) override
;
639 void set_trace_buffer_size (LONGEST val
) override
;
641 bool set_trace_notes (const char *user
, const char *notes
,
642 const char *stopnotes
) override
;
644 int core_of_thread (ptid_t ptid
) override
;
646 int verify_memory (const gdb_byte
*data
,
647 CORE_ADDR memaddr
, ULONGEST size
) override
;
650 bool get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
) override
;
652 void set_permissions () override
;
654 bool static_tracepoint_marker_at (CORE_ADDR
,
655 struct static_tracepoint_marker
*marker
)
658 std::vector
<static_tracepoint_marker
>
659 static_tracepoint_markers_by_strid (const char *id
) override
;
661 traceframe_info_up
traceframe_info () override
;
663 bool use_agent (bool use
) override
;
664 bool can_use_agent () override
;
666 struct btrace_target_info
*enable_btrace (ptid_t ptid
,
667 const struct btrace_config
*conf
) override
;
669 void disable_btrace (struct btrace_target_info
*tinfo
) override
;
671 void teardown_btrace (struct btrace_target_info
*tinfo
) override
;
673 enum btrace_error
read_btrace (struct btrace_data
*data
,
674 struct btrace_target_info
*btinfo
,
675 enum btrace_read_type type
) override
;
677 const struct btrace_config
*btrace_conf (const struct btrace_target_info
*) override
;
678 bool augmented_libraries_svr4_read () override
;
679 bool follow_fork (bool, bool) override
;
680 void follow_exec (struct inferior
*, const char *) override
;
681 int insert_fork_catchpoint (int) override
;
682 int remove_fork_catchpoint (int) override
;
683 int insert_vfork_catchpoint (int) override
;
684 int remove_vfork_catchpoint (int) override
;
685 int insert_exec_catchpoint (int) override
;
686 int remove_exec_catchpoint (int) override
;
687 enum exec_direction_kind
execution_direction () override
;
689 public: /* Remote specific methods. */
691 void remote_download_command_source (int num
, ULONGEST addr
,
692 struct command_line
*cmds
);
694 void remote_file_put (const char *local_file
, const char *remote_file
,
696 void remote_file_get (const char *remote_file
, const char *local_file
,
698 void remote_file_delete (const char *remote_file
, int from_tty
);
700 int remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
701 ULONGEST offset
, int *remote_errno
);
702 int remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
703 ULONGEST offset
, int *remote_errno
);
704 int remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
705 ULONGEST offset
, int *remote_errno
);
707 int remote_hostio_send_command (int command_bytes
, int which_packet
,
708 int *remote_errno
, char **attachment
,
709 int *attachment_len
);
710 int remote_hostio_set_filesystem (struct inferior
*inf
,
712 /* We should get rid of this and use fileio_open directly. */
713 int remote_hostio_open (struct inferior
*inf
, const char *filename
,
714 int flags
, int mode
, int warn_if_slow
,
716 int remote_hostio_close (int fd
, int *remote_errno
);
718 int remote_hostio_unlink (inferior
*inf
, const char *filename
,
721 struct remote_state
*get_remote_state ();
723 long get_remote_packet_size (void);
724 long get_memory_packet_size (struct memory_packet_config
*config
);
726 long get_memory_write_packet_size ();
727 long get_memory_read_packet_size ();
729 char *append_pending_thread_resumptions (char *p
, char *endp
,
731 static void open_1 (const char *name
, int from_tty
, int extended_p
);
732 void start_remote (int from_tty
, int extended_p
);
733 void remote_detach_1 (struct inferior
*inf
, int from_tty
);
735 char *append_resumption (char *p
, char *endp
,
736 ptid_t ptid
, int step
, gdb_signal siggnal
);
737 int remote_resume_with_vcont (ptid_t ptid
, int step
,
740 void add_current_inferior_and_thread (char *wait_status
);
742 ptid_t
wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
743 target_wait_flags options
);
744 ptid_t
wait_as (ptid_t ptid
, target_waitstatus
*status
,
745 target_wait_flags options
);
747 ptid_t
process_stop_reply (struct stop_reply
*stop_reply
,
748 target_waitstatus
*status
);
750 void remote_notice_new_inferior (ptid_t currthread
, int executing
);
752 void process_initial_stop_replies (int from_tty
);
754 thread_info
*remote_add_thread (ptid_t ptid
, bool running
, bool executing
);
756 void btrace_sync_conf (const btrace_config
*conf
);
758 void remote_btrace_maybe_reopen ();
760 void remove_new_fork_children (threads_listing_context
*context
);
761 void kill_new_fork_children (int pid
);
762 void discard_pending_stop_replies (struct inferior
*inf
);
763 int stop_reply_queue_length ();
765 void check_pending_events_prevent_wildcard_vcont
766 (int *may_global_wildcard_vcont
);
768 void discard_pending_stop_replies_in_queue ();
769 struct stop_reply
*remote_notif_remove_queued_reply (ptid_t ptid
);
770 struct stop_reply
*queued_stop_reply (ptid_t ptid
);
771 int peek_stop_reply (ptid_t ptid
);
772 void remote_parse_stop_reply (const char *buf
, stop_reply
*event
);
774 void remote_stop_ns (ptid_t ptid
);
775 void remote_interrupt_as ();
776 void remote_interrupt_ns ();
778 char *remote_get_noisy_reply ();
779 int remote_query_attached (int pid
);
780 inferior
*remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
783 ptid_t
remote_current_thread (ptid_t oldpid
);
784 ptid_t
get_current_thread (char *wait_status
);
786 void set_thread (ptid_t ptid
, int gen
);
787 void set_general_thread (ptid_t ptid
);
788 void set_continue_thread (ptid_t ptid
);
789 void set_general_process ();
791 char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
793 int remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
794 gdb_ext_thread_info
*info
);
795 int remote_get_threadinfo (threadref
*threadid
, int fieldset
,
796 gdb_ext_thread_info
*info
);
798 int parse_threadlist_response (char *pkt
, int result_limit
,
799 threadref
*original_echo
,
800 threadref
*resultlist
,
802 int remote_get_threadlist (int startflag
, threadref
*nextthread
,
803 int result_limit
, int *done
, int *result_count
,
804 threadref
*threadlist
);
806 int remote_threadlist_iterator (rmt_thread_action stepfunction
,
807 void *context
, int looplimit
);
809 int remote_get_threads_with_ql (threads_listing_context
*context
);
810 int remote_get_threads_with_qxfer (threads_listing_context
*context
);
811 int remote_get_threads_with_qthreadinfo (threads_listing_context
*context
);
813 void extended_remote_restart ();
817 void remote_check_symbols ();
819 void remote_supported_packet (const struct protocol_feature
*feature
,
820 enum packet_support support
,
821 const char *argument
);
823 void remote_query_supported ();
825 void remote_packet_size (const protocol_feature
*feature
,
826 packet_support support
, const char *value
);
828 void remote_serial_quit_handler ();
830 void remote_detach_pid (int pid
);
832 void remote_vcont_probe ();
834 void remote_resume_with_hc (ptid_t ptid
, int step
,
837 void send_interrupt_sequence ();
838 void interrupt_query ();
840 void remote_notif_get_pending_events (notif_client
*nc
);
842 int fetch_register_using_p (struct regcache
*regcache
,
844 int send_g_packet ();
845 void process_g_packet (struct regcache
*regcache
);
846 void fetch_registers_using_g (struct regcache
*regcache
);
847 int store_register_using_P (const struct regcache
*regcache
,
849 void store_registers_using_G (const struct regcache
*regcache
);
851 void set_remote_traceframe ();
853 void check_binary_download (CORE_ADDR addr
);
855 target_xfer_status
remote_write_bytes_aux (const char *header
,
857 const gdb_byte
*myaddr
,
860 ULONGEST
*xfered_len_units
,
864 target_xfer_status
remote_write_bytes (CORE_ADDR memaddr
,
865 const gdb_byte
*myaddr
, ULONGEST len
,
866 int unit_size
, ULONGEST
*xfered_len
);
868 target_xfer_status
remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
870 int unit_size
, ULONGEST
*xfered_len_units
);
872 target_xfer_status
remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
876 ULONGEST
*xfered_len
);
878 target_xfer_status
remote_read_bytes (CORE_ADDR memaddr
,
879 gdb_byte
*myaddr
, ULONGEST len
,
881 ULONGEST
*xfered_len
);
883 packet_result
remote_send_printf (const char *format
, ...)
884 ATTRIBUTE_PRINTF (2, 3);
886 target_xfer_status
remote_flash_write (ULONGEST address
,
887 ULONGEST length
, ULONGEST
*xfered_len
,
888 const gdb_byte
*data
);
890 int readchar (int timeout
);
892 void remote_serial_write (const char *str
, int len
);
894 int putpkt (const char *buf
);
895 int putpkt_binary (const char *buf
, int cnt
);
897 int putpkt (const gdb::char_vector
&buf
)
899 return putpkt (buf
.data ());
903 long read_frame (gdb::char_vector
*buf_p
);
904 void getpkt (gdb::char_vector
*buf
, int forever
);
905 int getpkt_or_notif_sane_1 (gdb::char_vector
*buf
, int forever
,
906 int expecting_notif
, int *is_notif
);
907 int getpkt_sane (gdb::char_vector
*buf
, int forever
);
908 int getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
910 int remote_vkill (int pid
);
911 void remote_kill_k ();
913 void extended_remote_disable_randomization (int val
);
914 int extended_remote_run (const std::string
&args
);
916 void send_environment_packet (const char *action
,
920 void extended_remote_environment_support ();
921 void extended_remote_set_inferior_cwd ();
923 target_xfer_status
remote_write_qxfer (const char *object_name
,
925 const gdb_byte
*writebuf
,
926 ULONGEST offset
, LONGEST len
,
927 ULONGEST
*xfered_len
,
928 struct packet_config
*packet
);
930 target_xfer_status
remote_read_qxfer (const char *object_name
,
932 gdb_byte
*readbuf
, ULONGEST offset
,
934 ULONGEST
*xfered_len
,
935 struct packet_config
*packet
);
937 void push_stop_reply (struct stop_reply
*new_event
);
939 bool vcont_r_supported ();
941 void packet_command (const char *args
, int from_tty
);
943 private: /* data fields */
945 /* The remote state. Don't reference this directly. Use the
946 get_remote_state method instead. */
947 remote_state m_remote_state
;
950 static const target_info extended_remote_target_info
= {
952 N_("Extended remote serial target in gdb-specific protocol"),
956 /* Set up the extended remote target by extending the standard remote
957 target and adding to it. */
959 class extended_remote_target final
: public remote_target
962 const target_info
&info () const override
963 { return extended_remote_target_info
; }
965 /* Open an extended-remote connection. */
966 static void open (const char *, int);
968 bool can_create_inferior () override
{ return true; }
969 void create_inferior (const char *, const std::string
&,
970 char **, int) override
;
972 void detach (inferior
*, int) override
;
974 bool can_attach () override
{ return true; }
975 void attach (const char *, int) override
;
977 void post_attach (int) override
;
978 bool supports_disable_randomization () override
;
981 /* Per-program-space data key. */
982 static const struct program_space_key
<char, gdb::xfree_deleter
<char>>
985 /* The variable registered as the control variable used by the
986 remote exec-file commands. While the remote exec-file setting is
987 per-program-space, the set/show machinery uses this as the
988 location of the remote exec-file value. */
989 static char *remote_exec_file_var
;
991 /* The size to align memory write packets, when practical. The protocol
992 does not guarantee any alignment, and gdb will generate short
993 writes and unaligned writes, but even as a best-effort attempt this
994 can improve bulk transfers. For instance, if a write is misaligned
995 relative to the target's data bus, the stub may need to make an extra
996 round trip fetching data from the target. This doesn't make a
997 huge difference, but it's easy to do, so we try to be helpful.
999 The alignment chosen is arbitrary; usually data bus width is
1000 important here, not the possibly larger cache line size. */
1001 enum { REMOTE_ALIGN_WRITES
= 16 };
1003 /* Prototypes for local functions. */
1005 static int hexnumlen (ULONGEST num
);
1007 static int stubhex (int ch
);
1009 static int hexnumstr (char *, ULONGEST
);
1011 static int hexnumnstr (char *, ULONGEST
, int);
1013 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
1015 static void print_packet (const char *);
1017 static int stub_unpack_int (char *buff
, int fieldlength
);
1019 struct packet_config
;
1021 static void show_packet_config_cmd (struct packet_config
*config
);
1023 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
1025 struct cmd_list_element
*c
,
1028 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
1030 static void remote_async_inferior_event_handler (gdb_client_data
);
1032 static bool remote_read_description_p (struct target_ops
*target
);
1034 static void remote_console_output (const char *msg
);
1036 static void remote_btrace_reset (remote_state
*rs
);
1038 static void remote_unpush_and_throw (remote_target
*target
);
1042 static struct cmd_list_element
*remote_cmdlist
;
1044 /* For "set remote" and "show remote". */
1046 static struct cmd_list_element
*remote_set_cmdlist
;
1047 static struct cmd_list_element
*remote_show_cmdlist
;
1049 /* Controls whether GDB is willing to use range stepping. */
1051 static bool use_range_stepping
= true;
1053 /* Private data that we'll store in (struct thread_info)->priv. */
1054 struct remote_thread_info
: public private_thread_info
1060 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1061 sequence of bytes. */
1062 gdb::byte_vector thread_handle
;
1064 /* Whether the target stopped for a breakpoint/watchpoint. */
1065 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1067 /* This is set to the data address of the access causing the target
1068 to stop for a watchpoint. */
1069 CORE_ADDR watch_data_address
= 0;
1071 /* Fields used by the vCont action coalescing implemented in
1072 remote_resume / remote_commit_resume. remote_resume stores each
1073 thread's last resume request in these fields, so that a later
1074 remote_commit_resume knows which is the proper action for this
1075 thread to include in the vCont packet. */
1077 /* True if the last target_resume call for this thread was a step
1078 request, false if a continue request. */
1079 int last_resume_step
= 0;
1081 /* The signal specified in the last target_resume call for this
1083 gdb_signal last_resume_sig
= GDB_SIGNAL_0
;
1085 /* Whether this thread was already vCont-resumed on the remote
1087 int vcont_resumed
= 0;
1090 remote_state::remote_state ()
1095 remote_state::~remote_state ()
1097 xfree (this->last_pass_packet
);
1098 xfree (this->last_program_signals_packet
);
1099 xfree (this->finished_object
);
1100 xfree (this->finished_annex
);
1103 /* Utility: generate error from an incoming stub packet. */
1105 trace_error (char *buf
)
1108 return; /* not an error msg */
1111 case '1': /* malformed packet error */
1112 if (*++buf
== '0') /* general case: */
1113 error (_("remote.c: error in outgoing packet."));
1115 error (_("remote.c: error in outgoing packet at field #%ld."),
1116 strtol (buf
, NULL
, 16));
1118 error (_("Target returns error code '%s'."), buf
);
1122 /* Utility: wait for reply from stub, while accepting "O" packets. */
1125 remote_target::remote_get_noisy_reply ()
1127 struct remote_state
*rs
= get_remote_state ();
1129 do /* Loop on reply from remote stub. */
1133 QUIT
; /* Allow user to bail out with ^C. */
1134 getpkt (&rs
->buf
, 0);
1135 buf
= rs
->buf
.data ();
1138 else if (startswith (buf
, "qRelocInsn:"))
1141 CORE_ADDR from
, to
, org_to
;
1143 int adjusted_size
= 0;
1146 p
= buf
+ strlen ("qRelocInsn:");
1147 pp
= unpack_varlen_hex (p
, &ul
);
1149 error (_("invalid qRelocInsn packet: %s"), buf
);
1153 unpack_varlen_hex (p
, &ul
);
1160 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
1163 catch (const gdb_exception
&ex
)
1165 if (ex
.error
== MEMORY_ERROR
)
1167 /* Propagate memory errors silently back to the
1168 target. The stub may have limited the range of
1169 addresses we can write to, for example. */
1173 /* Something unexpectedly bad happened. Be verbose
1174 so we can tell what, and propagate the error back
1175 to the stub, so it doesn't get stuck waiting for
1177 exception_fprintf (gdb_stderr
, ex
,
1178 _("warning: relocating instruction: "));
1185 adjusted_size
= to
- org_to
;
1187 xsnprintf (buf
, rs
->buf
.size (), "qRelocInsn:%x", adjusted_size
);
1191 else if (buf
[0] == 'O' && buf
[1] != 'K')
1192 remote_console_output (buf
+ 1); /* 'O' message from stub */
1194 return buf
; /* Here's the actual reply. */
1199 struct remote_arch_state
*
1200 remote_state::get_remote_arch_state (struct gdbarch
*gdbarch
)
1202 remote_arch_state
*rsa
;
1204 auto it
= this->m_arch_states
.find (gdbarch
);
1205 if (it
== this->m_arch_states
.end ())
1207 auto p
= this->m_arch_states
.emplace (std::piecewise_construct
,
1208 std::forward_as_tuple (gdbarch
),
1209 std::forward_as_tuple (gdbarch
));
1210 rsa
= &p
.first
->second
;
1212 /* Make sure that the packet buffer is plenty big enough for
1213 this architecture. */
1214 if (this->buf
.size () < rsa
->remote_packet_size
)
1215 this->buf
.resize (2 * rsa
->remote_packet_size
);
1223 /* Fetch the global remote target state. */
1226 remote_target::get_remote_state ()
1228 /* Make sure that the remote architecture state has been
1229 initialized, because doing so might reallocate rs->buf. Any
1230 function which calls getpkt also needs to be mindful of changes
1231 to rs->buf, but this call limits the number of places which run
1233 m_remote_state
.get_remote_arch_state (target_gdbarch ());
1235 return &m_remote_state
;
1238 /* Fetch the remote exec-file from the current program space. */
1241 get_remote_exec_file (void)
1243 char *remote_exec_file
;
1245 remote_exec_file
= remote_pspace_data
.get (current_program_space
);
1246 if (remote_exec_file
== NULL
)
1249 return remote_exec_file
;
1252 /* Set the remote exec file for PSPACE. */
1255 set_pspace_remote_exec_file (struct program_space
*pspace
,
1256 const char *remote_exec_file
)
1258 char *old_file
= remote_pspace_data
.get (pspace
);
1261 remote_pspace_data
.set (pspace
, xstrdup (remote_exec_file
));
1264 /* The "set/show remote exec-file" set command hook. */
1267 set_remote_exec_file (const char *ignored
, int from_tty
,
1268 struct cmd_list_element
*c
)
1270 gdb_assert (remote_exec_file_var
!= NULL
);
1271 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
1274 /* The "set/show remote exec-file" show command hook. */
1277 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
1278 struct cmd_list_element
*cmd
, const char *value
)
1280 fprintf_filtered (file
, "%s\n", get_remote_exec_file ());
1284 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
1286 int regnum
, num_remote_regs
, offset
;
1287 struct packet_reg
**remote_regs
;
1289 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
1291 struct packet_reg
*r
= ®s
[regnum
];
1293 if (register_size (gdbarch
, regnum
) == 0)
1294 /* Do not try to fetch zero-sized (placeholder) registers. */
1297 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
1302 /* Define the g/G packet format as the contents of each register
1303 with a remote protocol number, in order of ascending protocol
1306 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
1307 for (num_remote_regs
= 0, regnum
= 0;
1308 regnum
< gdbarch_num_regs (gdbarch
);
1310 if (regs
[regnum
].pnum
!= -1)
1311 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
1313 std::sort (remote_regs
, remote_regs
+ num_remote_regs
,
1314 [] (const packet_reg
*a
, const packet_reg
*b
)
1315 { return a
->pnum
< b
->pnum
; });
1317 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
1319 remote_regs
[regnum
]->in_g_packet
= 1;
1320 remote_regs
[regnum
]->offset
= offset
;
1321 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
1327 /* Given the architecture described by GDBARCH, return the remote
1328 protocol register's number and the register's offset in the g/G
1329 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1330 If the target does not have a mapping for REGNUM, return false,
1331 otherwise, return true. */
1334 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
1335 int *pnum
, int *poffset
)
1337 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
1339 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
1341 map_regcache_remote_table (gdbarch
, regs
.data ());
1343 *pnum
= regs
[regnum
].pnum
;
1344 *poffset
= regs
[regnum
].offset
;
1349 remote_arch_state::remote_arch_state (struct gdbarch
*gdbarch
)
1351 /* Use the architecture to build a regnum<->pnum table, which will be
1352 1:1 unless a feature set specifies otherwise. */
1353 this->regs
.reset (new packet_reg
[gdbarch_num_regs (gdbarch
)] ());
1355 /* Record the maximum possible size of the g packet - it may turn out
1357 this->sizeof_g_packet
1358 = map_regcache_remote_table (gdbarch
, this->regs
.get ());
1360 /* Default maximum number of characters in a packet body. Many
1361 remote stubs have a hardwired buffer size of 400 bytes
1362 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1363 as the maximum packet-size to ensure that the packet and an extra
1364 NUL character can always fit in the buffer. This stops GDB
1365 trashing stubs that try to squeeze an extra NUL into what is
1366 already a full buffer (As of 1999-12-04 that was most stubs). */
1367 this->remote_packet_size
= 400 - 1;
1369 /* This one is filled in when a ``g'' packet is received. */
1370 this->actual_register_packet_size
= 0;
1372 /* Should rsa->sizeof_g_packet needs more space than the
1373 default, adjust the size accordingly. Remember that each byte is
1374 encoded as two characters. 32 is the overhead for the packet
1375 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1376 (``$NN:G...#NN'') is a better guess, the below has been padded a
1378 if (this->sizeof_g_packet
> ((this->remote_packet_size
- 32) / 2))
1379 this->remote_packet_size
= (this->sizeof_g_packet
* 2 + 32);
1382 /* Get a pointer to the current remote target. If not connected to a
1383 remote target, return NULL. */
1385 static remote_target
*
1386 get_current_remote_target ()
1388 target_ops
*proc_target
= current_inferior ()->process_target ();
1389 return dynamic_cast<remote_target
*> (proc_target
);
1392 /* Return the current allowed size of a remote packet. This is
1393 inferred from the current architecture, and should be used to
1394 limit the length of outgoing packets. */
1396 remote_target::get_remote_packet_size ()
1398 struct remote_state
*rs
= get_remote_state ();
1399 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1401 if (rs
->explicit_packet_size
)
1402 return rs
->explicit_packet_size
;
1404 return rsa
->remote_packet_size
;
1407 static struct packet_reg
*
1408 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1411 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
1415 struct packet_reg
*r
= &rsa
->regs
[regnum
];
1417 gdb_assert (r
->regnum
== regnum
);
1422 static struct packet_reg
*
1423 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1428 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
1430 struct packet_reg
*r
= &rsa
->regs
[i
];
1432 if (r
->pnum
== pnum
)
1438 /* Allow the user to specify what sequence to send to the remote
1439 when he requests a program interruption: Although ^C is usually
1440 what remote systems expect (this is the default, here), it is
1441 sometimes preferable to send a break. On other systems such
1442 as the Linux kernel, a break followed by g, which is Magic SysRq g
1443 is required in order to interrupt the execution. */
1444 const char interrupt_sequence_control_c
[] = "Ctrl-C";
1445 const char interrupt_sequence_break
[] = "BREAK";
1446 const char interrupt_sequence_break_g
[] = "BREAK-g";
1447 static const char *const interrupt_sequence_modes
[] =
1449 interrupt_sequence_control_c
,
1450 interrupt_sequence_break
,
1451 interrupt_sequence_break_g
,
1454 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
1457 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
1458 struct cmd_list_element
*c
,
1461 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
1462 fprintf_filtered (file
,
1463 _("Send the ASCII ETX character (Ctrl-c) "
1464 "to the remote target to interrupt the "
1465 "execution of the program.\n"));
1466 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
1467 fprintf_filtered (file
,
1468 _("send a break signal to the remote target "
1469 "to interrupt the execution of the program.\n"));
1470 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
1471 fprintf_filtered (file
,
1472 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1473 "the remote target to interrupt the execution "
1474 "of Linux kernel.\n"));
1476 internal_error (__FILE__
, __LINE__
,
1477 _("Invalid value for interrupt_sequence_mode: %s."),
1478 interrupt_sequence_mode
);
1481 /* This boolean variable specifies whether interrupt_sequence is sent
1482 to the remote target when gdb connects to it.
1483 This is mostly needed when you debug the Linux kernel: The Linux kernel
1484 expects BREAK g which is Magic SysRq g for connecting gdb. */
1485 static bool interrupt_on_connect
= false;
1487 /* This variable is used to implement the "set/show remotebreak" commands.
1488 Since these commands are now deprecated in favor of "set/show remote
1489 interrupt-sequence", it no longer has any effect on the code. */
1490 static bool remote_break
;
1493 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1496 interrupt_sequence_mode
= interrupt_sequence_break
;
1498 interrupt_sequence_mode
= interrupt_sequence_control_c
;
1502 show_remotebreak (struct ui_file
*file
, int from_tty
,
1503 struct cmd_list_element
*c
,
1508 /* This variable sets the number of bits in an address that are to be
1509 sent in a memory ("M" or "m") packet. Normally, after stripping
1510 leading zeros, the entire address would be sent. This variable
1511 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1512 initial implementation of remote.c restricted the address sent in
1513 memory packets to ``host::sizeof long'' bytes - (typically 32
1514 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1515 address was never sent. Since fixing this bug may cause a break in
1516 some remote targets this variable is principally provided to
1517 facilitate backward compatibility. */
1519 static unsigned int remote_address_size
;
1522 /* User configurable variables for the number of characters in a
1523 memory read/write packet. MIN (rsa->remote_packet_size,
1524 rsa->sizeof_g_packet) is the default. Some targets need smaller
1525 values (fifo overruns, et.al.) and some users need larger values
1526 (speed up transfers). The variables ``preferred_*'' (the user
1527 request), ``current_*'' (what was actually set) and ``forced_*''
1528 (Positive - a soft limit, negative - a hard limit). */
1530 struct memory_packet_config
1537 /* The default max memory-write-packet-size, when the setting is
1538 "fixed". The 16k is historical. (It came from older GDB's using
1539 alloca for buffers and the knowledge (folklore?) that some hosts
1540 don't cope very well with large alloca calls.) */
1541 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1543 /* The minimum remote packet size for memory transfers. Ensures we
1544 can write at least one byte. */
1545 #define MIN_MEMORY_PACKET_SIZE 20
1547 /* Get the memory packet size, assuming it is fixed. */
1550 get_fixed_memory_packet_size (struct memory_packet_config
*config
)
1552 gdb_assert (config
->fixed_p
);
1554 if (config
->size
<= 0)
1555 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
;
1557 return config
->size
;
1560 /* Compute the current size of a read/write packet. Since this makes
1561 use of ``actual_register_packet_size'' the computation is dynamic. */
1564 remote_target::get_memory_packet_size (struct memory_packet_config
*config
)
1566 struct remote_state
*rs
= get_remote_state ();
1567 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1570 if (config
->fixed_p
)
1571 what_they_get
= get_fixed_memory_packet_size (config
);
1574 what_they_get
= get_remote_packet_size ();
1575 /* Limit the packet to the size specified by the user. */
1576 if (config
->size
> 0
1577 && what_they_get
> config
->size
)
1578 what_they_get
= config
->size
;
1580 /* Limit it to the size of the targets ``g'' response unless we have
1581 permission from the stub to use a larger packet size. */
1582 if (rs
->explicit_packet_size
== 0
1583 && rsa
->actual_register_packet_size
> 0
1584 && what_they_get
> rsa
->actual_register_packet_size
)
1585 what_they_get
= rsa
->actual_register_packet_size
;
1587 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1588 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1590 /* Make sure there is room in the global buffer for this packet
1591 (including its trailing NUL byte). */
1592 if (rs
->buf
.size () < what_they_get
+ 1)
1593 rs
->buf
.resize (2 * what_they_get
);
1595 return what_they_get
;
1598 /* Update the size of a read/write packet. If they user wants
1599 something really big then do a sanity check. */
1602 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1604 int fixed_p
= config
->fixed_p
;
1605 long size
= config
->size
;
1608 error (_("Argument required (integer, `fixed' or `limited')."));
1609 else if (strcmp (args
, "hard") == 0
1610 || strcmp (args
, "fixed") == 0)
1612 else if (strcmp (args
, "soft") == 0
1613 || strcmp (args
, "limit") == 0)
1619 size
= strtoul (args
, &end
, 0);
1621 error (_("Invalid %s (bad syntax)."), config
->name
);
1623 /* Instead of explicitly capping the size of a packet to or
1624 disallowing it, the user is allowed to set the size to
1625 something arbitrarily large. */
1629 if (fixed_p
&& !config
->fixed_p
)
1631 /* So that the query shows the correct value. */
1632 long query_size
= (size
<= 0
1633 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1636 if (! query (_("The target may not be able to correctly handle a %s\n"
1637 "of %ld bytes. Change the packet size? "),
1638 config
->name
, query_size
))
1639 error (_("Packet size not changed."));
1641 /* Update the config. */
1642 config
->fixed_p
= fixed_p
;
1643 config
->size
= size
;
1647 show_memory_packet_size (struct memory_packet_config
*config
)
1649 if (config
->size
== 0)
1650 printf_filtered (_("The %s is 0 (default). "), config
->name
);
1652 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1653 if (config
->fixed_p
)
1654 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1655 get_fixed_memory_packet_size (config
));
1658 remote_target
*remote
= get_current_remote_target ();
1661 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1662 remote
->get_memory_packet_size (config
));
1664 puts_filtered ("The actual limit will be further reduced "
1665 "dependent on the target.\n");
1669 /* FIXME: needs to be per-remote-target. */
1670 static struct memory_packet_config memory_write_packet_config
=
1672 "memory-write-packet-size",
1676 set_memory_write_packet_size (const char *args
, int from_tty
)
1678 set_memory_packet_size (args
, &memory_write_packet_config
);
1682 show_memory_write_packet_size (const char *args
, int from_tty
)
1684 show_memory_packet_size (&memory_write_packet_config
);
1687 /* Show the number of hardware watchpoints that can be used. */
1690 show_hardware_watchpoint_limit (struct ui_file
*file
, int from_tty
,
1691 struct cmd_list_element
*c
,
1694 fprintf_filtered (file
, _("The maximum number of target hardware "
1695 "watchpoints is %s.\n"), value
);
1698 /* Show the length limit (in bytes) for hardware watchpoints. */
1701 show_hardware_watchpoint_length_limit (struct ui_file
*file
, int from_tty
,
1702 struct cmd_list_element
*c
,
1705 fprintf_filtered (file
, _("The maximum length (in bytes) of a target "
1706 "hardware watchpoint is %s.\n"), value
);
1709 /* Show the number of hardware breakpoints that can be used. */
1712 show_hardware_breakpoint_limit (struct ui_file
*file
, int from_tty
,
1713 struct cmd_list_element
*c
,
1716 fprintf_filtered (file
, _("The maximum number of target hardware "
1717 "breakpoints is %s.\n"), value
);
1720 /* Controls the maximum number of characters to display in the debug output
1721 for each remote packet. The remaining characters are omitted. */
1723 static int remote_packet_max_chars
= 512;
1725 /* Show the maximum number of characters to display for each remote packet
1726 when remote debugging is enabled. */
1729 show_remote_packet_max_chars (struct ui_file
*file
, int from_tty
,
1730 struct cmd_list_element
*c
,
1733 fprintf_filtered (file
, _("Number of remote packet characters to "
1734 "display is %s.\n"), value
);
1738 remote_target::get_memory_write_packet_size ()
1740 return get_memory_packet_size (&memory_write_packet_config
);
1743 /* FIXME: needs to be per-remote-target. */
1744 static struct memory_packet_config memory_read_packet_config
=
1746 "memory-read-packet-size",
1750 set_memory_read_packet_size (const char *args
, int from_tty
)
1752 set_memory_packet_size (args
, &memory_read_packet_config
);
1756 show_memory_read_packet_size (const char *args
, int from_tty
)
1758 show_memory_packet_size (&memory_read_packet_config
);
1762 remote_target::get_memory_read_packet_size ()
1764 long size
= get_memory_packet_size (&memory_read_packet_config
);
1766 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1767 extra buffer size argument before the memory read size can be
1768 increased beyond this. */
1769 if (size
> get_remote_packet_size ())
1770 size
= get_remote_packet_size ();
1776 struct packet_config
1781 /* If auto, GDB auto-detects support for this packet or feature,
1782 either through qSupported, or by trying the packet and looking
1783 at the response. If true, GDB assumes the target supports this
1784 packet. If false, the packet is disabled. Configs that don't
1785 have an associated command always have this set to auto. */
1786 enum auto_boolean detect
;
1788 /* Does the target support this packet? */
1789 enum packet_support support
;
1792 static enum packet_support
packet_config_support (struct packet_config
*config
);
1793 static enum packet_support
packet_support (int packet
);
1796 show_packet_config_cmd (struct packet_config
*config
)
1798 const char *support
= "internal-error";
1800 switch (packet_config_support (config
))
1803 support
= "enabled";
1805 case PACKET_DISABLE
:
1806 support
= "disabled";
1808 case PACKET_SUPPORT_UNKNOWN
:
1809 support
= "unknown";
1812 switch (config
->detect
)
1814 case AUTO_BOOLEAN_AUTO
:
1815 printf_filtered (_("Support for the `%s' packet "
1816 "is auto-detected, currently %s.\n"),
1817 config
->name
, support
);
1819 case AUTO_BOOLEAN_TRUE
:
1820 case AUTO_BOOLEAN_FALSE
:
1821 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1822 config
->name
, support
);
1828 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1829 const char *title
, int legacy
)
1835 config
->name
= name
;
1836 config
->title
= title
;
1837 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet.",
1839 show_doc
= xstrprintf ("Show current use of remote "
1840 "protocol `%s' (%s) packet.",
1842 /* set/show TITLE-packet {auto,on,off} */
1843 cmd_name
= xstrprintf ("%s-packet", title
);
1844 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1845 &config
->detect
, set_doc
,
1846 show_doc
, NULL
, /* help_doc */
1848 show_remote_protocol_packet_cmd
,
1849 &remote_set_cmdlist
, &remote_show_cmdlist
);
1850 /* The command code copies the documentation strings. */
1853 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1858 legacy_name
= xstrprintf ("%s-packet", name
);
1859 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1860 &remote_set_cmdlist
);
1861 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1862 &remote_show_cmdlist
);
1866 static enum packet_result
1867 packet_check_result (const char *buf
)
1871 /* The stub recognized the packet request. Check that the
1872 operation succeeded. */
1874 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1876 /* "Enn" - definitely an error. */
1877 return PACKET_ERROR
;
1879 /* Always treat "E." as an error. This will be used for
1880 more verbose error messages, such as E.memtypes. */
1881 if (buf
[0] == 'E' && buf
[1] == '.')
1882 return PACKET_ERROR
;
1884 /* The packet may or may not be OK. Just assume it is. */
1888 /* The stub does not support the packet. */
1889 return PACKET_UNKNOWN
;
1892 static enum packet_result
1893 packet_check_result (const gdb::char_vector
&buf
)
1895 return packet_check_result (buf
.data ());
1898 static enum packet_result
1899 packet_ok (const char *buf
, struct packet_config
*config
)
1901 enum packet_result result
;
1903 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1904 && config
->support
== PACKET_DISABLE
)
1905 internal_error (__FILE__
, __LINE__
,
1906 _("packet_ok: attempt to use a disabled packet"));
1908 result
= packet_check_result (buf
);
1913 /* The stub recognized the packet request. */
1914 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1917 fprintf_unfiltered (gdb_stdlog
,
1918 "Packet %s (%s) is supported\n",
1919 config
->name
, config
->title
);
1920 config
->support
= PACKET_ENABLE
;
1923 case PACKET_UNKNOWN
:
1924 /* The stub does not support the packet. */
1925 if (config
->detect
== AUTO_BOOLEAN_AUTO
1926 && config
->support
== PACKET_ENABLE
)
1928 /* If the stub previously indicated that the packet was
1929 supported then there is a protocol error. */
1930 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1931 config
->name
, config
->title
);
1933 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1935 /* The user set it wrong. */
1936 error (_("Enabled packet %s (%s) not recognized by stub"),
1937 config
->name
, config
->title
);
1941 fprintf_unfiltered (gdb_stdlog
,
1942 "Packet %s (%s) is NOT supported\n",
1943 config
->name
, config
->title
);
1944 config
->support
= PACKET_DISABLE
;
1951 static enum packet_result
1952 packet_ok (const gdb::char_vector
&buf
, struct packet_config
*config
)
1954 return packet_ok (buf
.data (), config
);
1971 PACKET_vFile_pwrite
,
1973 PACKET_vFile_unlink
,
1974 PACKET_vFile_readlink
,
1977 PACKET_qXfer_features
,
1978 PACKET_qXfer_exec_file
,
1979 PACKET_qXfer_libraries
,
1980 PACKET_qXfer_libraries_svr4
,
1981 PACKET_qXfer_memory_map
,
1982 PACKET_qXfer_osdata
,
1983 PACKET_qXfer_threads
,
1984 PACKET_qXfer_statictrace_read
,
1985 PACKET_qXfer_traceframe_info
,
1991 PACKET_QPassSignals
,
1992 PACKET_QCatchSyscalls
,
1993 PACKET_QProgramSignals
,
1994 PACKET_QSetWorkingDir
,
1995 PACKET_QStartupWithShell
,
1996 PACKET_QEnvironmentHexEncoded
,
1997 PACKET_QEnvironmentReset
,
1998 PACKET_QEnvironmentUnset
,
2000 PACKET_qSearch_memory
,
2003 PACKET_QStartNoAckMode
,
2005 PACKET_qXfer_siginfo_read
,
2006 PACKET_qXfer_siginfo_write
,
2009 /* Support for conditional tracepoints. */
2010 PACKET_ConditionalTracepoints
,
2012 /* Support for target-side breakpoint conditions. */
2013 PACKET_ConditionalBreakpoints
,
2015 /* Support for target-side breakpoint commands. */
2016 PACKET_BreakpointCommands
,
2018 /* Support for fast tracepoints. */
2019 PACKET_FastTracepoints
,
2021 /* Support for static tracepoints. */
2022 PACKET_StaticTracepoints
,
2024 /* Support for installing tracepoints while a trace experiment is
2026 PACKET_InstallInTrace
,
2030 PACKET_TracepointSource
,
2033 PACKET_QDisableRandomization
,
2035 PACKET_QTBuffer_size
,
2039 PACKET_qXfer_btrace
,
2041 /* Support for the QNonStop packet. */
2044 /* Support for the QThreadEvents packet. */
2045 PACKET_QThreadEvents
,
2047 /* Support for multi-process extensions. */
2048 PACKET_multiprocess_feature
,
2050 /* Support for enabling and disabling tracepoints while a trace
2051 experiment is running. */
2052 PACKET_EnableDisableTracepoints_feature
,
2054 /* Support for collecting strings using the tracenz bytecode. */
2055 PACKET_tracenz_feature
,
2057 /* Support for continuing to run a trace experiment while GDB is
2059 PACKET_DisconnectedTracing_feature
,
2061 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2062 PACKET_augmented_libraries_svr4_read_feature
,
2064 /* Support for the qXfer:btrace-conf:read packet. */
2065 PACKET_qXfer_btrace_conf
,
2067 /* Support for the Qbtrace-conf:bts:size packet. */
2068 PACKET_Qbtrace_conf_bts_size
,
2070 /* Support for swbreak+ feature. */
2071 PACKET_swbreak_feature
,
2073 /* Support for hwbreak+ feature. */
2074 PACKET_hwbreak_feature
,
2076 /* Support for fork events. */
2077 PACKET_fork_event_feature
,
2079 /* Support for vfork events. */
2080 PACKET_vfork_event_feature
,
2082 /* Support for the Qbtrace-conf:pt:size packet. */
2083 PACKET_Qbtrace_conf_pt_size
,
2085 /* Support for exec events. */
2086 PACKET_exec_event_feature
,
2088 /* Support for query supported vCont actions. */
2089 PACKET_vContSupported
,
2091 /* Support remote CTRL-C. */
2094 /* Support TARGET_WAITKIND_NO_RESUMED. */
2100 /* FIXME: needs to be per-remote-target. Ignoring this for now,
2101 assuming all remote targets are the same server (thus all support
2102 the same packets). */
2103 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
2105 /* Returns the packet's corresponding "set remote foo-packet" command
2106 state. See struct packet_config for more details. */
2108 static enum auto_boolean
2109 packet_set_cmd_state (int packet
)
2111 return remote_protocol_packets
[packet
].detect
;
2114 /* Returns whether a given packet or feature is supported. This takes
2115 into account the state of the corresponding "set remote foo-packet"
2116 command, which may be used to bypass auto-detection. */
2118 static enum packet_support
2119 packet_config_support (struct packet_config
*config
)
2121 switch (config
->detect
)
2123 case AUTO_BOOLEAN_TRUE
:
2124 return PACKET_ENABLE
;
2125 case AUTO_BOOLEAN_FALSE
:
2126 return PACKET_DISABLE
;
2127 case AUTO_BOOLEAN_AUTO
:
2128 return config
->support
;
2130 gdb_assert_not_reached (_("bad switch"));
2134 /* Same as packet_config_support, but takes the packet's enum value as
2137 static enum packet_support
2138 packet_support (int packet
)
2140 struct packet_config
*config
= &remote_protocol_packets
[packet
];
2142 return packet_config_support (config
);
2146 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
2147 struct cmd_list_element
*c
,
2150 struct packet_config
*packet
;
2152 for (packet
= remote_protocol_packets
;
2153 packet
< &remote_protocol_packets
[PACKET_MAX
];
2156 if (&packet
->detect
== c
->var
)
2158 show_packet_config_cmd (packet
);
2162 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
2166 /* Should we try one of the 'Z' requests? */
2170 Z_PACKET_SOFTWARE_BP
,
2171 Z_PACKET_HARDWARE_BP
,
2178 /* For compatibility with older distributions. Provide a ``set remote
2179 Z-packet ...'' command that updates all the Z packet types. */
2181 static enum auto_boolean remote_Z_packet_detect
;
2184 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
2185 struct cmd_list_element
*c
)
2189 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2190 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
2194 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
2195 struct cmd_list_element
*c
,
2200 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2202 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
2206 /* Returns true if the multi-process extensions are in effect. */
2209 remote_multi_process_p (struct remote_state
*rs
)
2211 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
2214 /* Returns true if fork events are supported. */
2217 remote_fork_event_p (struct remote_state
*rs
)
2219 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
2222 /* Returns true if vfork events are supported. */
2225 remote_vfork_event_p (struct remote_state
*rs
)
2227 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
2230 /* Returns true if exec events are supported. */
2233 remote_exec_event_p (struct remote_state
*rs
)
2235 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
2238 /* Insert fork catchpoint target routine. If fork events are enabled
2239 then return success, nothing more to do. */
2242 remote_target::insert_fork_catchpoint (int pid
)
2244 struct remote_state
*rs
= get_remote_state ();
2246 return !remote_fork_event_p (rs
);
2249 /* Remove fork catchpoint target routine. Nothing to do, just
2253 remote_target::remove_fork_catchpoint (int pid
)
2258 /* Insert vfork catchpoint target routine. If vfork events are enabled
2259 then return success, nothing more to do. */
2262 remote_target::insert_vfork_catchpoint (int pid
)
2264 struct remote_state
*rs
= get_remote_state ();
2266 return !remote_vfork_event_p (rs
);
2269 /* Remove vfork catchpoint target routine. Nothing to do, just
2273 remote_target::remove_vfork_catchpoint (int pid
)
2278 /* Insert exec catchpoint target routine. If exec events are
2279 enabled, just return success. */
2282 remote_target::insert_exec_catchpoint (int pid
)
2284 struct remote_state
*rs
= get_remote_state ();
2286 return !remote_exec_event_p (rs
);
2289 /* Remove exec catchpoint target routine. Nothing to do, just
2293 remote_target::remove_exec_catchpoint (int pid
)
2300 /* Take advantage of the fact that the TID field is not used, to tag
2301 special ptids with it set to != 0. */
2302 static const ptid_t
magic_null_ptid (42000, -1, 1);
2303 static const ptid_t
not_sent_ptid (42000, -2, 1);
2304 static const ptid_t
any_thread_ptid (42000, 0, 1);
2306 /* Find out if the stub attached to PID (and hence GDB should offer to
2307 detach instead of killing it when bailing out). */
2310 remote_target::remote_query_attached (int pid
)
2312 struct remote_state
*rs
= get_remote_state ();
2313 size_t size
= get_remote_packet_size ();
2315 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
2318 if (remote_multi_process_p (rs
))
2319 xsnprintf (rs
->buf
.data (), size
, "qAttached:%x", pid
);
2321 xsnprintf (rs
->buf
.data (), size
, "qAttached");
2324 getpkt (&rs
->buf
, 0);
2326 switch (packet_ok (rs
->buf
,
2327 &remote_protocol_packets
[PACKET_qAttached
]))
2330 if (strcmp (rs
->buf
.data (), "1") == 0)
2334 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
2336 case PACKET_UNKNOWN
:
2343 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2344 has been invented by GDB, instead of reported by the target. Since
2345 we can be connected to a remote system before before knowing about
2346 any inferior, mark the target with execution when we find the first
2347 inferior. If ATTACHED is 1, then we had just attached to this
2348 inferior. If it is 0, then we just created this inferior. If it
2349 is -1, then try querying the remote stub to find out if it had
2350 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2351 attempt to open this inferior's executable as the main executable
2352 if no main executable is open already. */
2355 remote_target::remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
2358 struct inferior
*inf
;
2360 /* Check whether this process we're learning about is to be
2361 considered attached, or if is to be considered to have been
2362 spawned by the stub. */
2364 attached
= remote_query_attached (pid
);
2366 if (gdbarch_has_global_solist (target_gdbarch ()))
2368 /* If the target shares code across all inferiors, then every
2369 attach adds a new inferior. */
2370 inf
= add_inferior (pid
);
2372 /* ... and every inferior is bound to the same program space.
2373 However, each inferior may still have its own address
2375 inf
->aspace
= maybe_new_address_space ();
2376 inf
->pspace
= current_program_space
;
2380 /* In the traditional debugging scenario, there's a 1-1 match
2381 between program/address spaces. We simply bind the inferior
2382 to the program space's address space. */
2383 inf
= current_inferior ();
2385 /* However, if the current inferior is already bound to a
2386 process, find some other empty inferior. */
2390 for (inferior
*it
: all_inferiors ())
2399 /* Since all inferiors were already bound to a process, add
2401 inf
= add_inferior_with_spaces ();
2403 switch_to_inferior_no_thread (inf
);
2405 inferior_appeared (inf
, pid
);
2408 inf
->attach_flag
= attached
;
2409 inf
->fake_pid_p
= fake_pid_p
;
2411 /* If no main executable is currently open then attempt to
2412 open the file that was executed to create this inferior. */
2413 if (try_open_exec
&& get_exec_file (0) == NULL
)
2414 exec_file_locate_attach (pid
, 0, 1);
2416 /* Check for exec file mismatch, and let the user solve it. */
2417 validate_exec_file (1);
2422 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
2423 static remote_thread_info
*get_remote_thread_info (remote_target
*target
,
2426 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2427 according to RUNNING. */
2430 remote_target::remote_add_thread (ptid_t ptid
, bool running
, bool executing
)
2432 struct remote_state
*rs
= get_remote_state ();
2433 struct thread_info
*thread
;
2435 /* GDB historically didn't pull threads in the initial connection
2436 setup. If the remote target doesn't even have a concept of
2437 threads (e.g., a bare-metal target), even if internally we
2438 consider that a single-threaded target, mentioning a new thread
2439 might be confusing to the user. Be silent then, preserving the
2440 age old behavior. */
2441 if (rs
->starting_up
)
2442 thread
= add_thread_silent (this, ptid
);
2444 thread
= add_thread (this, ptid
);
2446 get_remote_thread_info (thread
)->vcont_resumed
= executing
;
2447 set_executing (this, ptid
, executing
);
2448 set_running (this, ptid
, running
);
2453 /* Come here when we learn about a thread id from the remote target.
2454 It may be the first time we hear about such thread, so take the
2455 opportunity to add it to GDB's thread list. In case this is the
2456 first time we're noticing its corresponding inferior, add it to
2457 GDB's inferior list as well. EXECUTING indicates whether the
2458 thread is (internally) executing or stopped. */
2461 remote_target::remote_notice_new_inferior (ptid_t currthread
, int executing
)
2463 /* In non-stop mode, we assume new found threads are (externally)
2464 running until proven otherwise with a stop reply. In all-stop,
2465 we can only get here if all threads are stopped. */
2466 int running
= target_is_non_stop_p () ? 1 : 0;
2468 /* If this is a new thread, add it to GDB's thread list.
2469 If we leave it up to WFI to do this, bad things will happen. */
2471 thread_info
*tp
= find_thread_ptid (this, currthread
);
2472 if (tp
!= NULL
&& tp
->state
== THREAD_EXITED
)
2474 /* We're seeing an event on a thread id we knew had exited.
2475 This has to be a new thread reusing the old id. Add it. */
2476 remote_add_thread (currthread
, running
, executing
);
2480 if (!in_thread_list (this, currthread
))
2482 struct inferior
*inf
= NULL
;
2483 int pid
= currthread
.pid ();
2485 if (inferior_ptid
.is_pid ()
2486 && pid
== inferior_ptid
.pid ())
2488 /* inferior_ptid has no thread member yet. This can happen
2489 with the vAttach -> remote_wait,"TAAthread:" path if the
2490 stub doesn't support qC. This is the first stop reported
2491 after an attach, so this is the main thread. Update the
2492 ptid in the thread list. */
2493 if (in_thread_list (this, ptid_t (pid
)))
2494 thread_change_ptid (this, inferior_ptid
, currthread
);
2498 = remote_add_thread (currthread
, running
, executing
);
2499 switch_to_thread (thr
);
2504 if (magic_null_ptid
== inferior_ptid
)
2506 /* inferior_ptid is not set yet. This can happen with the
2507 vRun -> remote_wait,"TAAthread:" path if the stub
2508 doesn't support qC. This is the first stop reported
2509 after an attach, so this is the main thread. Update the
2510 ptid in the thread list. */
2511 thread_change_ptid (this, inferior_ptid
, currthread
);
2515 /* When connecting to a target remote, or to a target
2516 extended-remote which already was debugging an inferior, we
2517 may not know about it yet. Add it before adding its child
2518 thread, so notifications are emitted in a sensible order. */
2519 if (find_inferior_pid (this, currthread
.pid ()) == NULL
)
2521 struct remote_state
*rs
= get_remote_state ();
2522 bool fake_pid_p
= !remote_multi_process_p (rs
);
2524 inf
= remote_add_inferior (fake_pid_p
,
2525 currthread
.pid (), -1, 1);
2528 /* This is really a new thread. Add it. */
2529 thread_info
*new_thr
2530 = remote_add_thread (currthread
, running
, executing
);
2532 /* If we found a new inferior, let the common code do whatever
2533 it needs to with it (e.g., read shared libraries, insert
2534 breakpoints), unless we're just setting up an all-stop
2538 struct remote_state
*rs
= get_remote_state ();
2540 if (!rs
->starting_up
)
2541 notice_new_inferior (new_thr
, executing
, 0);
2546 /* Return THREAD's private thread data, creating it if necessary. */
2548 static remote_thread_info
*
2549 get_remote_thread_info (thread_info
*thread
)
2551 gdb_assert (thread
!= NULL
);
2553 if (thread
->priv
== NULL
)
2554 thread
->priv
.reset (new remote_thread_info
);
2556 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
2559 /* Return PTID's private thread data, creating it if necessary. */
2561 static remote_thread_info
*
2562 get_remote_thread_info (remote_target
*target
, ptid_t ptid
)
2564 thread_info
*thr
= find_thread_ptid (target
, ptid
);
2565 return get_remote_thread_info (thr
);
2568 /* Call this function as a result of
2569 1) A halt indication (T packet) containing a thread id
2570 2) A direct query of currthread
2571 3) Successful execution of set thread */
2574 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2576 rs
->general_thread
= currthread
;
2579 /* If 'QPassSignals' is supported, tell the remote stub what signals
2580 it can simply pass through to the inferior without reporting. */
2583 remote_target::pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2585 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2587 char *pass_packet
, *p
;
2589 struct remote_state
*rs
= get_remote_state ();
2591 gdb_assert (pass_signals
.size () < 256);
2592 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2594 if (pass_signals
[i
])
2597 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2598 strcpy (pass_packet
, "QPassSignals:");
2599 p
= pass_packet
+ strlen (pass_packet
);
2600 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2602 if (pass_signals
[i
])
2605 *p
++ = tohex (i
>> 4);
2606 *p
++ = tohex (i
& 15);
2615 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2617 putpkt (pass_packet
);
2618 getpkt (&rs
->buf
, 0);
2619 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2620 xfree (rs
->last_pass_packet
);
2621 rs
->last_pass_packet
= pass_packet
;
2624 xfree (pass_packet
);
2628 /* If 'QCatchSyscalls' is supported, tell the remote stub
2629 to report syscalls to GDB. */
2632 remote_target::set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
2633 gdb::array_view
<const int> syscall_counts
)
2635 const char *catch_packet
;
2636 enum packet_result result
;
2639 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2641 /* Not supported. */
2645 if (needed
&& any_count
== 0)
2647 /* Count how many syscalls are to be caught. */
2648 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2650 if (syscall_counts
[i
] != 0)
2657 fprintf_unfiltered (gdb_stdlog
,
2658 "remote_set_syscall_catchpoint "
2659 "pid %d needed %d any_count %d n_sysno %d\n",
2660 pid
, needed
, any_count
, n_sysno
);
2663 std::string built_packet
;
2666 /* Prepare a packet with the sysno list, assuming max 8+1
2667 characters for a sysno. If the resulting packet size is too
2668 big, fallback on the non-selective packet. */
2669 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2670 built_packet
.reserve (maxpktsz
);
2671 built_packet
= "QCatchSyscalls:1";
2674 /* Add in each syscall to be caught. */
2675 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2677 if (syscall_counts
[i
] != 0)
2678 string_appendf (built_packet
, ";%zx", i
);
2681 if (built_packet
.size () > get_remote_packet_size ())
2683 /* catch_packet too big. Fallback to less efficient
2684 non selective mode, with GDB doing the filtering. */
2685 catch_packet
= "QCatchSyscalls:1";
2688 catch_packet
= built_packet
.c_str ();
2691 catch_packet
= "QCatchSyscalls:0";
2693 struct remote_state
*rs
= get_remote_state ();
2695 putpkt (catch_packet
);
2696 getpkt (&rs
->buf
, 0);
2697 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2698 if (result
== PACKET_OK
)
2704 /* If 'QProgramSignals' is supported, tell the remote stub what
2705 signals it should pass through to the inferior when detaching. */
2708 remote_target::program_signals (gdb::array_view
<const unsigned char> signals
)
2710 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2714 struct remote_state
*rs
= get_remote_state ();
2716 gdb_assert (signals
.size () < 256);
2717 for (size_t i
= 0; i
< signals
.size (); i
++)
2722 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2723 strcpy (packet
, "QProgramSignals:");
2724 p
= packet
+ strlen (packet
);
2725 for (size_t i
= 0; i
< signals
.size (); i
++)
2727 if (signal_pass_state (i
))
2730 *p
++ = tohex (i
>> 4);
2731 *p
++ = tohex (i
& 15);
2740 if (!rs
->last_program_signals_packet
2741 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2744 getpkt (&rs
->buf
, 0);
2745 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2746 xfree (rs
->last_program_signals_packet
);
2747 rs
->last_program_signals_packet
= packet
;
2754 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2755 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2756 thread. If GEN is set, set the general thread, if not, then set
2757 the step/continue thread. */
2759 remote_target::set_thread (ptid_t ptid
, int gen
)
2761 struct remote_state
*rs
= get_remote_state ();
2762 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2763 char *buf
= rs
->buf
.data ();
2764 char *endbuf
= buf
+ get_remote_packet_size ();
2770 *buf
++ = gen
? 'g' : 'c';
2771 if (ptid
== magic_null_ptid
)
2772 xsnprintf (buf
, endbuf
- buf
, "0");
2773 else if (ptid
== any_thread_ptid
)
2774 xsnprintf (buf
, endbuf
- buf
, "0");
2775 else if (ptid
== minus_one_ptid
)
2776 xsnprintf (buf
, endbuf
- buf
, "-1");
2778 write_ptid (buf
, endbuf
, ptid
);
2780 getpkt (&rs
->buf
, 0);
2782 rs
->general_thread
= ptid
;
2784 rs
->continue_thread
= ptid
;
2788 remote_target::set_general_thread (ptid_t ptid
)
2790 set_thread (ptid
, 1);
2794 remote_target::set_continue_thread (ptid_t ptid
)
2796 set_thread (ptid
, 0);
2799 /* Change the remote current process. Which thread within the process
2800 ends up selected isn't important, as long as it is the same process
2801 as what INFERIOR_PTID points to.
2803 This comes from that fact that there is no explicit notion of
2804 "selected process" in the protocol. The selected process for
2805 general operations is the process the selected general thread
2809 remote_target::set_general_process ()
2811 struct remote_state
*rs
= get_remote_state ();
2813 /* If the remote can't handle multiple processes, don't bother. */
2814 if (!remote_multi_process_p (rs
))
2817 /* We only need to change the remote current thread if it's pointing
2818 at some other process. */
2819 if (rs
->general_thread
.pid () != inferior_ptid
.pid ())
2820 set_general_thread (inferior_ptid
);
2824 /* Return nonzero if this is the main thread that we made up ourselves
2825 to model non-threaded targets as single-threaded. */
2828 remote_thread_always_alive (ptid_t ptid
)
2830 if (ptid
== magic_null_ptid
)
2831 /* The main thread is always alive. */
2834 if (ptid
.pid () != 0 && ptid
.lwp () == 0)
2835 /* The main thread is always alive. This can happen after a
2836 vAttach, if the remote side doesn't support
2843 /* Return nonzero if the thread PTID is still alive on the remote
2847 remote_target::thread_alive (ptid_t ptid
)
2849 struct remote_state
*rs
= get_remote_state ();
2852 /* Check if this is a thread that we made up ourselves to model
2853 non-threaded targets as single-threaded. */
2854 if (remote_thread_always_alive (ptid
))
2857 p
= rs
->buf
.data ();
2858 endp
= p
+ get_remote_packet_size ();
2861 write_ptid (p
, endp
, ptid
);
2864 getpkt (&rs
->buf
, 0);
2865 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2868 /* Return a pointer to a thread name if we know it and NULL otherwise.
2869 The thread_info object owns the memory for the name. */
2872 remote_target::thread_name (struct thread_info
*info
)
2874 if (info
->priv
!= NULL
)
2876 const std::string
&name
= get_remote_thread_info (info
)->name
;
2877 return !name
.empty () ? name
.c_str () : NULL
;
2883 /* About these extended threadlist and threadinfo packets. They are
2884 variable length packets but, the fields within them are often fixed
2885 length. They are redundant enough to send over UDP as is the
2886 remote protocol in general. There is a matching unit test module
2889 /* WARNING: This threadref data structure comes from the remote O.S.,
2890 libstub protocol encoding, and remote.c. It is not particularly
2893 /* Right now, the internal structure is int. We want it to be bigger.
2894 Plan to fix this. */
2896 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2898 /* gdb_ext_thread_info is an internal GDB data structure which is
2899 equivalent to the reply of the remote threadinfo packet. */
2901 struct gdb_ext_thread_info
2903 threadref threadid
; /* External form of thread reference. */
2904 int active
; /* Has state interesting to GDB?
2906 char display
[256]; /* Brief state display, name,
2907 blocked/suspended. */
2908 char shortname
[32]; /* To be used to name threads. */
2909 char more_display
[256]; /* Long info, statistics, queue depth,
2913 /* The volume of remote transfers can be limited by submitting
2914 a mask containing bits specifying the desired information.
2915 Use a union of these values as the 'selection' parameter to
2916 get_thread_info. FIXME: Make these TAG names more thread specific. */
2918 #define TAG_THREADID 1
2919 #define TAG_EXISTS 2
2920 #define TAG_DISPLAY 4
2921 #define TAG_THREADNAME 8
2922 #define TAG_MOREDISPLAY 16
2924 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2926 static char *unpack_nibble (char *buf
, int *val
);
2928 static char *unpack_byte (char *buf
, int *value
);
2930 static char *pack_int (char *buf
, int value
);
2932 static char *unpack_int (char *buf
, int *value
);
2934 static char *unpack_string (char *src
, char *dest
, int length
);
2936 static char *pack_threadid (char *pkt
, threadref
*id
);
2938 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2940 void int_to_threadref (threadref
*id
, int value
);
2942 static int threadref_to_int (threadref
*ref
);
2944 static void copy_threadref (threadref
*dest
, threadref
*src
);
2946 static int threadmatch (threadref
*dest
, threadref
*src
);
2948 static char *pack_threadinfo_request (char *pkt
, int mode
,
2951 static char *pack_threadlist_request (char *pkt
, int startflag
,
2953 threadref
*nextthread
);
2955 static int remote_newthread_step (threadref
*ref
, void *context
);
2958 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2959 buffer we're allowed to write to. Returns
2960 BUF+CHARACTERS_WRITTEN. */
2963 remote_target::write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2966 struct remote_state
*rs
= get_remote_state ();
2968 if (remote_multi_process_p (rs
))
2972 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2974 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2978 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2980 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2985 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2986 last parsed char. Returns null_ptid if no thread id is found, and
2987 throws an error if the thread id has an invalid format. */
2990 read_ptid (const char *buf
, const char **obuf
)
2992 const char *p
= buf
;
2994 ULONGEST pid
= 0, tid
= 0;
2998 /* Multi-process ptid. */
2999 pp
= unpack_varlen_hex (p
+ 1, &pid
);
3001 error (_("invalid remote ptid: %s"), p
);
3004 pp
= unpack_varlen_hex (p
+ 1, &tid
);
3007 return ptid_t (pid
, tid
, 0);
3010 /* No multi-process. Just a tid. */
3011 pp
= unpack_varlen_hex (p
, &tid
);
3013 /* Return null_ptid when no thread id is found. */
3021 /* Since the stub is not sending a process id, then default to
3022 what's in inferior_ptid, unless it's null at this point. If so,
3023 then since there's no way to know the pid of the reported
3024 threads, use the magic number. */
3025 if (inferior_ptid
== null_ptid
)
3026 pid
= magic_null_ptid
.pid ();
3028 pid
= inferior_ptid
.pid ();
3032 return ptid_t (pid
, tid
, 0);
3038 if (ch
>= 'a' && ch
<= 'f')
3039 return ch
- 'a' + 10;
3040 if (ch
>= '0' && ch
<= '9')
3042 if (ch
>= 'A' && ch
<= 'F')
3043 return ch
- 'A' + 10;
3048 stub_unpack_int (char *buff
, int fieldlength
)
3055 nibble
= stubhex (*buff
++);
3059 retval
= retval
<< 4;
3065 unpack_nibble (char *buf
, int *val
)
3067 *val
= fromhex (*buf
++);
3072 unpack_byte (char *buf
, int *value
)
3074 *value
= stub_unpack_int (buf
, 2);
3079 pack_int (char *buf
, int value
)
3081 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
3082 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
3083 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
3084 buf
= pack_hex_byte (buf
, (value
& 0xff));
3089 unpack_int (char *buf
, int *value
)
3091 *value
= stub_unpack_int (buf
, 8);
3095 #if 0 /* Currently unused, uncomment when needed. */
3096 static char *pack_string (char *pkt
, char *string
);
3099 pack_string (char *pkt
, char *string
)
3104 len
= strlen (string
);
3106 len
= 200; /* Bigger than most GDB packets, junk??? */
3107 pkt
= pack_hex_byte (pkt
, len
);
3111 if ((ch
== '\0') || (ch
== '#'))
3112 ch
= '*'; /* Protect encapsulation. */
3117 #endif /* 0 (unused) */
3120 unpack_string (char *src
, char *dest
, int length
)
3129 pack_threadid (char *pkt
, threadref
*id
)
3132 unsigned char *altid
;
3134 altid
= (unsigned char *) id
;
3135 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
3137 pkt
= pack_hex_byte (pkt
, *altid
++);
3143 unpack_threadid (char *inbuf
, threadref
*id
)
3146 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
3149 altref
= (char *) id
;
3151 while (inbuf
< limit
)
3153 x
= stubhex (*inbuf
++);
3154 y
= stubhex (*inbuf
++);
3155 *altref
++ = (x
<< 4) | y
;
3160 /* Externally, threadrefs are 64 bits but internally, they are still
3161 ints. This is due to a mismatch of specifications. We would like
3162 to use 64bit thread references internally. This is an adapter
3166 int_to_threadref (threadref
*id
, int value
)
3168 unsigned char *scan
;
3170 scan
= (unsigned char *) id
;
3176 *scan
++ = (value
>> 24) & 0xff;
3177 *scan
++ = (value
>> 16) & 0xff;
3178 *scan
++ = (value
>> 8) & 0xff;
3179 *scan
++ = (value
& 0xff);
3183 threadref_to_int (threadref
*ref
)
3186 unsigned char *scan
;
3192 value
= (value
<< 8) | ((*scan
++) & 0xff);
3197 copy_threadref (threadref
*dest
, threadref
*src
)
3200 unsigned char *csrc
, *cdest
;
3202 csrc
= (unsigned char *) src
;
3203 cdest
= (unsigned char *) dest
;
3210 threadmatch (threadref
*dest
, threadref
*src
)
3212 /* Things are broken right now, so just assume we got a match. */
3214 unsigned char *srcp
, *destp
;
3216 srcp
= (char *) src
;
3217 destp
= (char *) dest
;
3221 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
3228 threadid:1, # always request threadid
3235 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3238 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
3240 *pkt
++ = 'q'; /* Info Query */
3241 *pkt
++ = 'P'; /* process or thread info */
3242 pkt
= pack_int (pkt
, mode
); /* mode */
3243 pkt
= pack_threadid (pkt
, id
); /* threadid */
3244 *pkt
= '\0'; /* terminate */
3248 /* These values tag the fields in a thread info response packet. */
3249 /* Tagging the fields allows us to request specific fields and to
3250 add more fields as time goes by. */
3252 #define TAG_THREADID 1 /* Echo the thread identifier. */
3253 #define TAG_EXISTS 2 /* Is this process defined enough to
3254 fetch registers and its stack? */
3255 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3256 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3257 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3261 remote_target::remote_unpack_thread_info_response (char *pkt
,
3262 threadref
*expectedref
,
3263 gdb_ext_thread_info
*info
)
3265 struct remote_state
*rs
= get_remote_state ();
3269 char *limit
= pkt
+ rs
->buf
.size (); /* Plausible parsing limit. */
3272 /* info->threadid = 0; FIXME: implement zero_threadref. */
3274 info
->display
[0] = '\0';
3275 info
->shortname
[0] = '\0';
3276 info
->more_display
[0] = '\0';
3278 /* Assume the characters indicating the packet type have been
3280 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
3281 pkt
= unpack_threadid (pkt
, &ref
);
3284 warning (_("Incomplete response to threadinfo request."));
3285 if (!threadmatch (&ref
, expectedref
))
3286 { /* This is an answer to a different request. */
3287 warning (_("ERROR RMT Thread info mismatch."));
3290 copy_threadref (&info
->threadid
, &ref
);
3292 /* Loop on tagged fields , try to bail if something goes wrong. */
3294 /* Packets are terminated with nulls. */
3295 while ((pkt
< limit
) && mask
&& *pkt
)
3297 pkt
= unpack_int (pkt
, &tag
); /* tag */
3298 pkt
= unpack_byte (pkt
, &length
); /* length */
3299 if (!(tag
& mask
)) /* Tags out of synch with mask. */
3301 warning (_("ERROR RMT: threadinfo tag mismatch."));
3305 if (tag
== TAG_THREADID
)
3309 warning (_("ERROR RMT: length of threadid is not 16."));
3313 pkt
= unpack_threadid (pkt
, &ref
);
3314 mask
= mask
& ~TAG_THREADID
;
3317 if (tag
== TAG_EXISTS
)
3319 info
->active
= stub_unpack_int (pkt
, length
);
3321 mask
= mask
& ~(TAG_EXISTS
);
3324 warning (_("ERROR RMT: 'exists' length too long."));
3330 if (tag
== TAG_THREADNAME
)
3332 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
3333 mask
= mask
& ~TAG_THREADNAME
;
3336 if (tag
== TAG_DISPLAY
)
3338 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
3339 mask
= mask
& ~TAG_DISPLAY
;
3342 if (tag
== TAG_MOREDISPLAY
)
3344 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
3345 mask
= mask
& ~TAG_MOREDISPLAY
;
3348 warning (_("ERROR RMT: unknown thread info tag."));
3349 break; /* Not a tag we know about. */
3355 remote_target::remote_get_threadinfo (threadref
*threadid
,
3357 gdb_ext_thread_info
*info
)
3359 struct remote_state
*rs
= get_remote_state ();
3362 pack_threadinfo_request (rs
->buf
.data (), fieldset
, threadid
);
3364 getpkt (&rs
->buf
, 0);
3366 if (rs
->buf
[0] == '\0')
3369 result
= remote_unpack_thread_info_response (&rs
->buf
[2],
3374 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3377 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
3378 threadref
*nextthread
)
3380 *pkt
++ = 'q'; /* info query packet */
3381 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
3382 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
3383 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
3384 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
3389 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3392 remote_target::parse_threadlist_response (char *pkt
, int result_limit
,
3393 threadref
*original_echo
,
3394 threadref
*resultlist
,
3397 struct remote_state
*rs
= get_remote_state ();
3399 int count
, resultcount
, done
;
3402 /* Assume the 'q' and 'M chars have been stripped. */
3403 limit
= pkt
+ (rs
->buf
.size () - BUF_THREAD_ID_SIZE
);
3404 /* done parse past here */
3405 pkt
= unpack_byte (pkt
, &count
); /* count field */
3406 pkt
= unpack_nibble (pkt
, &done
);
3407 /* The first threadid is the argument threadid. */
3408 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
3409 while ((count
-- > 0) && (pkt
< limit
))
3411 pkt
= unpack_threadid (pkt
, resultlist
++);
3412 if (resultcount
++ >= result_limit
)
3420 /* Fetch the next batch of threads from the remote. Returns -1 if the
3421 qL packet is not supported, 0 on error and 1 on success. */
3424 remote_target::remote_get_threadlist (int startflag
, threadref
*nextthread
,
3425 int result_limit
, int *done
, int *result_count
,
3426 threadref
*threadlist
)
3428 struct remote_state
*rs
= get_remote_state ();
3431 /* Truncate result limit to be smaller than the packet size. */
3432 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
3433 >= get_remote_packet_size ())
3434 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
3436 pack_threadlist_request (rs
->buf
.data (), startflag
, result_limit
,
3439 getpkt (&rs
->buf
, 0);
3440 if (rs
->buf
[0] == '\0')
3442 /* Packet not supported. */
3447 parse_threadlist_response (&rs
->buf
[2], result_limit
,
3448 &rs
->echo_nextthread
, threadlist
, done
);
3450 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
3452 /* FIXME: This is a good reason to drop the packet. */
3453 /* Possibly, there is a duplicate response. */
3455 retransmit immediatly - race conditions
3456 retransmit after timeout - yes
3458 wait for packet, then exit
3460 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3461 return 0; /* I choose simply exiting. */
3463 if (*result_count
<= 0)
3467 warning (_("RMT ERROR : failed to get remote thread list."));
3470 return result
; /* break; */
3472 if (*result_count
> result_limit
)
3475 warning (_("RMT ERROR: threadlist response longer than requested."));
3481 /* Fetch the list of remote threads, with the qL packet, and call
3482 STEPFUNCTION for each thread found. Stops iterating and returns 1
3483 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3484 STEPFUNCTION returns false. If the packet is not supported,
3488 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction
,
3489 void *context
, int looplimit
)
3491 struct remote_state
*rs
= get_remote_state ();
3492 int done
, i
, result_count
;
3500 if (loopcount
++ > looplimit
)
3503 warning (_("Remote fetch threadlist -infinite loop-."));
3506 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
3507 MAXTHREADLISTRESULTS
,
3508 &done
, &result_count
,
3509 rs
->resultthreadlist
);
3512 /* Clear for later iterations. */
3514 /* Setup to resume next batch of thread references, set nextthread. */
3515 if (result_count
>= 1)
3516 copy_threadref (&rs
->nextthread
,
3517 &rs
->resultthreadlist
[result_count
- 1]);
3519 while (result_count
--)
3521 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
3531 /* A thread found on the remote target. */
3535 explicit thread_item (ptid_t ptid_
)
3539 thread_item (thread_item
&&other
) = default;
3540 thread_item
&operator= (thread_item
&&other
) = default;
3542 DISABLE_COPY_AND_ASSIGN (thread_item
);
3544 /* The thread's PTID. */
3547 /* The thread's extra info. */
3550 /* The thread's name. */
3553 /* The core the thread was running on. -1 if not known. */
3556 /* The thread handle associated with the thread. */
3557 gdb::byte_vector thread_handle
;
3560 /* Context passed around to the various methods listing remote
3561 threads. As new threads are found, they're added to the ITEMS
3564 struct threads_listing_context
3566 /* Return true if this object contains an entry for a thread with ptid
3569 bool contains_thread (ptid_t ptid
) const
3571 auto match_ptid
= [&] (const thread_item
&item
)
3573 return item
.ptid
== ptid
;
3576 auto it
= std::find_if (this->items
.begin (),
3580 return it
!= this->items
.end ();
3583 /* Remove the thread with ptid PTID. */
3585 void remove_thread (ptid_t ptid
)
3587 auto match_ptid
= [&] (const thread_item
&item
)
3589 return item
.ptid
== ptid
;
3592 auto it
= std::remove_if (this->items
.begin (),
3596 if (it
!= this->items
.end ())
3597 this->items
.erase (it
);
3600 /* The threads found on the remote target. */
3601 std::vector
<thread_item
> items
;
3605 remote_newthread_step (threadref
*ref
, void *data
)
3607 struct threads_listing_context
*context
3608 = (struct threads_listing_context
*) data
;
3609 int pid
= inferior_ptid
.pid ();
3610 int lwp
= threadref_to_int (ref
);
3611 ptid_t
ptid (pid
, lwp
);
3613 context
->items
.emplace_back (ptid
);
3615 return 1; /* continue iterator */
3618 #define CRAZY_MAX_THREADS 1000
3621 remote_target::remote_current_thread (ptid_t oldpid
)
3623 struct remote_state
*rs
= get_remote_state ();
3626 getpkt (&rs
->buf
, 0);
3627 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3632 result
= read_ptid (&rs
->buf
[2], &obuf
);
3633 if (*obuf
!= '\0' && remote_debug
)
3634 fprintf_unfiltered (gdb_stdlog
,
3635 "warning: garbage in qC reply\n");
3643 /* List remote threads using the deprecated qL packet. */
3646 remote_target::remote_get_threads_with_ql (threads_listing_context
*context
)
3648 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3649 CRAZY_MAX_THREADS
) >= 0)
3655 #if defined(HAVE_LIBEXPAT)
3658 start_thread (struct gdb_xml_parser
*parser
,
3659 const struct gdb_xml_element
*element
,
3661 std::vector
<gdb_xml_value
> &attributes
)
3663 struct threads_listing_context
*data
3664 = (struct threads_listing_context
*) user_data
;
3665 struct gdb_xml_value
*attr
;
3667 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3668 ptid_t ptid
= read_ptid (id
, NULL
);
3670 data
->items
.emplace_back (ptid
);
3671 thread_item
&item
= data
->items
.back ();
3673 attr
= xml_find_attribute (attributes
, "core");
3675 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3677 attr
= xml_find_attribute (attributes
, "name");
3679 item
.name
= (const char *) attr
->value
.get ();
3681 attr
= xml_find_attribute (attributes
, "handle");
3683 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3687 end_thread (struct gdb_xml_parser
*parser
,
3688 const struct gdb_xml_element
*element
,
3689 void *user_data
, const char *body_text
)
3691 struct threads_listing_context
*data
3692 = (struct threads_listing_context
*) user_data
;
3694 if (body_text
!= NULL
&& *body_text
!= '\0')
3695 data
->items
.back ().extra
= body_text
;
3698 const struct gdb_xml_attribute thread_attributes
[] = {
3699 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3700 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3701 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3702 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3703 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3706 const struct gdb_xml_element thread_children
[] = {
3707 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3710 const struct gdb_xml_element threads_children
[] = {
3711 { "thread", thread_attributes
, thread_children
,
3712 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3713 start_thread
, end_thread
},
3714 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3717 const struct gdb_xml_element threads_elements
[] = {
3718 { "threads", NULL
, threads_children
,
3719 GDB_XML_EF_NONE
, NULL
, NULL
},
3720 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3725 /* List remote threads using qXfer:threads:read. */
3728 remote_target::remote_get_threads_with_qxfer (threads_listing_context
*context
)
3730 #if defined(HAVE_LIBEXPAT)
3731 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3733 gdb::optional
<gdb::char_vector
> xml
3734 = target_read_stralloc (this, TARGET_OBJECT_THREADS
, NULL
);
3736 if (xml
&& (*xml
)[0] != '\0')
3738 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3739 threads_elements
, xml
->data (), context
);
3749 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3752 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context
*context
)
3754 struct remote_state
*rs
= get_remote_state ();
3756 if (rs
->use_threadinfo_query
)
3760 putpkt ("qfThreadInfo");
3761 getpkt (&rs
->buf
, 0);
3762 bufp
= rs
->buf
.data ();
3763 if (bufp
[0] != '\0') /* q packet recognized */
3765 while (*bufp
++ == 'm') /* reply contains one or more TID */
3769 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3770 context
->items
.emplace_back (ptid
);
3772 while (*bufp
++ == ','); /* comma-separated list */
3773 putpkt ("qsThreadInfo");
3774 getpkt (&rs
->buf
, 0);
3775 bufp
= rs
->buf
.data ();
3781 /* Packet not recognized. */
3782 rs
->use_threadinfo_query
= 0;
3789 /* Return true if INF only has one non-exited thread. */
3792 has_single_non_exited_thread (inferior
*inf
)
3795 for (thread_info
*tp ATTRIBUTE_UNUSED
: inf
->non_exited_threads ())
3801 /* Implement the to_update_thread_list function for the remote
3805 remote_target::update_thread_list ()
3807 struct threads_listing_context context
;
3810 /* We have a few different mechanisms to fetch the thread list. Try
3811 them all, starting with the most preferred one first, falling
3812 back to older methods. */
3813 if (remote_get_threads_with_qxfer (&context
)
3814 || remote_get_threads_with_qthreadinfo (&context
)
3815 || remote_get_threads_with_ql (&context
))
3819 if (context
.items
.empty ()
3820 && remote_thread_always_alive (inferior_ptid
))
3822 /* Some targets don't really support threads, but still
3823 reply an (empty) thread list in response to the thread
3824 listing packets, instead of replying "packet not
3825 supported". Exit early so we don't delete the main
3830 /* CONTEXT now holds the current thread list on the remote
3831 target end. Delete GDB-side threads no longer found on the
3833 for (thread_info
*tp
: all_threads_safe ())
3835 if (tp
->inf
->process_target () != this)
3838 if (!context
.contains_thread (tp
->ptid
))
3840 /* Do not remove the thread if it is the last thread in
3841 the inferior. This situation happens when we have a
3842 pending exit process status to process. Otherwise we
3843 may end up with a seemingly live inferior (i.e. pid
3844 != 0) that has no threads. */
3845 if (has_single_non_exited_thread (tp
->inf
))
3853 /* Remove any unreported fork child threads from CONTEXT so
3854 that we don't interfere with follow fork, which is where
3855 creation of such threads is handled. */
3856 remove_new_fork_children (&context
);
3858 /* And now add threads we don't know about yet to our list. */
3859 for (thread_item
&item
: context
.items
)
3861 if (item
.ptid
!= null_ptid
)
3863 /* In non-stop mode, we assume new found threads are
3864 executing until proven otherwise with a stop reply.
3865 In all-stop, we can only get here if all threads are
3867 int executing
= target_is_non_stop_p () ? 1 : 0;
3869 remote_notice_new_inferior (item
.ptid
, executing
);
3871 thread_info
*tp
= find_thread_ptid (this, item
.ptid
);
3872 remote_thread_info
*info
= get_remote_thread_info (tp
);
3873 info
->core
= item
.core
;
3874 info
->extra
= std::move (item
.extra
);
3875 info
->name
= std::move (item
.name
);
3876 info
->thread_handle
= std::move (item
.thread_handle
);
3883 /* If no thread listing method is supported, then query whether
3884 each known thread is alive, one by one, with the T packet.
3885 If the target doesn't support threads at all, then this is a
3886 no-op. See remote_thread_alive. */
3892 * Collect a descriptive string about the given thread.
3893 * The target may say anything it wants to about the thread
3894 * (typically info about its blocked / runnable state, name, etc.).
3895 * This string will appear in the info threads display.
3897 * Optional: targets are not required to implement this function.
3901 remote_target::extra_thread_info (thread_info
*tp
)
3903 struct remote_state
*rs
= get_remote_state ();
3906 struct gdb_ext_thread_info threadinfo
;
3908 if (rs
->remote_desc
== 0) /* paranoia */
3909 internal_error (__FILE__
, __LINE__
,
3910 _("remote_threads_extra_info"));
3912 if (tp
->ptid
== magic_null_ptid
3913 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
3914 /* This is the main thread which was added by GDB. The remote
3915 server doesn't know about it. */
3918 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
3920 /* If already have cached info, use it. */
3921 if (!extra
.empty ())
3922 return extra
.c_str ();
3924 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3926 /* If we're using qXfer:threads:read, then the extra info is
3927 included in the XML. So if we didn't have anything cached,
3928 it's because there's really no extra info. */
3932 if (rs
->use_threadextra_query
)
3934 char *b
= rs
->buf
.data ();
3935 char *endb
= b
+ get_remote_packet_size ();
3937 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3939 write_ptid (b
, endb
, tp
->ptid
);
3942 getpkt (&rs
->buf
, 0);
3943 if (rs
->buf
[0] != 0)
3945 extra
.resize (strlen (rs
->buf
.data ()) / 2);
3946 hex2bin (rs
->buf
.data (), (gdb_byte
*) &extra
[0], extra
.size ());
3947 return extra
.c_str ();
3951 /* If the above query fails, fall back to the old method. */
3952 rs
->use_threadextra_query
= 0;
3953 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3954 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3955 int_to_threadref (&id
, tp
->ptid
.lwp ());
3956 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3957 if (threadinfo
.active
)
3959 if (*threadinfo
.shortname
)
3960 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
3961 if (*threadinfo
.display
)
3963 if (!extra
.empty ())
3965 string_appendf (extra
, " State: %s", threadinfo
.display
);
3967 if (*threadinfo
.more_display
)
3969 if (!extra
.empty ())
3971 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
3973 return extra
.c_str ();
3980 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
3981 struct static_tracepoint_marker
*marker
)
3983 struct remote_state
*rs
= get_remote_state ();
3984 char *p
= rs
->buf
.data ();
3986 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3988 p
+= hexnumstr (p
, addr
);
3990 getpkt (&rs
->buf
, 0);
3991 p
= rs
->buf
.data ();
3994 error (_("Remote failure reply: %s"), p
);
3998 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
4005 std::vector
<static_tracepoint_marker
>
4006 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
4008 struct remote_state
*rs
= get_remote_state ();
4009 std::vector
<static_tracepoint_marker
> markers
;
4011 static_tracepoint_marker marker
;
4013 /* Ask for a first packet of static tracepoint marker
4016 getpkt (&rs
->buf
, 0);
4017 p
= rs
->buf
.data ();
4019 error (_("Remote failure reply: %s"), p
);
4025 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
4027 if (strid
== NULL
|| marker
.str_id
== strid
)
4028 markers
.push_back (std::move (marker
));
4030 while (*p
++ == ','); /* comma-separated list */
4031 /* Ask for another packet of static tracepoint definition. */
4033 getpkt (&rs
->buf
, 0);
4034 p
= rs
->buf
.data ();
4041 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4044 remote_target::get_ada_task_ptid (long lwp
, long thread
)
4046 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
4050 /* Restart the remote side; this is an extended protocol operation. */
4053 remote_target::extended_remote_restart ()
4055 struct remote_state
*rs
= get_remote_state ();
4057 /* Send the restart command; for reasons I don't understand the
4058 remote side really expects a number after the "R". */
4059 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "R%x", 0);
4062 remote_fileio_reset ();
4065 /* Clean up connection to a remote debugger. */
4068 remote_target::close ()
4070 /* Make sure we leave stdin registered in the event loop. */
4073 trace_reset_local_state ();
4078 remote_target::~remote_target ()
4080 struct remote_state
*rs
= get_remote_state ();
4082 /* Check for NULL because we may get here with a partially
4083 constructed target/connection. */
4084 if (rs
->remote_desc
== nullptr)
4087 serial_close (rs
->remote_desc
);
4089 /* We are destroying the remote target, so we should discard
4090 everything of this target. */
4091 discard_pending_stop_replies_in_queue ();
4093 if (rs
->remote_async_inferior_event_token
)
4094 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4096 delete rs
->notif_state
;
4099 /* Query the remote side for the text, data and bss offsets. */
4102 remote_target::get_offsets ()
4104 struct remote_state
*rs
= get_remote_state ();
4107 int lose
, num_segments
= 0, do_sections
, do_segments
;
4108 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4110 if (current_program_space
->symfile_object_file
== NULL
)
4113 putpkt ("qOffsets");
4114 getpkt (&rs
->buf
, 0);
4115 buf
= rs
->buf
.data ();
4117 if (buf
[0] == '\000')
4118 return; /* Return silently. Stub doesn't support
4122 warning (_("Remote failure reply: %s"), buf
);
4126 /* Pick up each field in turn. This used to be done with scanf, but
4127 scanf will make trouble if CORE_ADDR size doesn't match
4128 conversion directives correctly. The following code will work
4129 with any size of CORE_ADDR. */
4130 text_addr
= data_addr
= bss_addr
= 0;
4134 if (startswith (ptr
, "Text="))
4137 /* Don't use strtol, could lose on big values. */
4138 while (*ptr
&& *ptr
!= ';')
4139 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4141 if (startswith (ptr
, ";Data="))
4144 while (*ptr
&& *ptr
!= ';')
4145 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4150 if (!lose
&& startswith (ptr
, ";Bss="))
4153 while (*ptr
&& *ptr
!= ';')
4154 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4156 if (bss_addr
!= data_addr
)
4157 warning (_("Target reported unsupported offsets: %s"), buf
);
4162 else if (startswith (ptr
, "TextSeg="))
4165 /* Don't use strtol, could lose on big values. */
4166 while (*ptr
&& *ptr
!= ';')
4167 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4170 if (startswith (ptr
, ";DataSeg="))
4173 while (*ptr
&& *ptr
!= ';')
4174 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4182 error (_("Malformed response to offset query, %s"), buf
);
4183 else if (*ptr
!= '\0')
4184 warning (_("Target reported unsupported offsets: %s"), buf
);
4186 objfile
*objf
= current_program_space
->symfile_object_file
;
4187 section_offsets offs
= objf
->section_offsets
;
4189 symfile_segment_data_up data
= get_symfile_segment_data (objf
->obfd
);
4190 do_segments
= (data
!= NULL
);
4191 do_sections
= num_segments
== 0;
4193 if (num_segments
> 0)
4195 segments
[0] = text_addr
;
4196 segments
[1] = data_addr
;
4198 /* If we have two segments, we can still try to relocate everything
4199 by assuming that the .text and .data offsets apply to the whole
4200 text and data segments. Convert the offsets given in the packet
4201 to base addresses for symfile_map_offsets_to_segments. */
4202 else if (data
!= nullptr && data
->segments
.size () == 2)
4204 segments
[0] = data
->segments
[0].base
+ text_addr
;
4205 segments
[1] = data
->segments
[1].base
+ data_addr
;
4208 /* If the object file has only one segment, assume that it is text
4209 rather than data; main programs with no writable data are rare,
4210 but programs with no code are useless. Of course the code might
4211 have ended up in the data segment... to detect that we would need
4212 the permissions here. */
4213 else if (data
&& data
->segments
.size () == 1)
4215 segments
[0] = data
->segments
[0].base
+ text_addr
;
4218 /* There's no way to relocate by segment. */
4224 int ret
= symfile_map_offsets_to_segments (objf
->obfd
,
4226 num_segments
, segments
);
4228 if (ret
== 0 && !do_sections
)
4229 error (_("Can not handle qOffsets TextSeg "
4230 "response with this symbol file"));
4238 offs
[SECT_OFF_TEXT (objf
)] = text_addr
;
4240 /* This is a temporary kludge to force data and bss to use the
4241 same offsets because that's what nlmconv does now. The real
4242 solution requires changes to the stub and remote.c that I
4243 don't have time to do right now. */
4245 offs
[SECT_OFF_DATA (objf
)] = data_addr
;
4246 offs
[SECT_OFF_BSS (objf
)] = data_addr
;
4249 objfile_relocate (objf
, offs
);
4252 /* Send interrupt_sequence to remote target. */
4255 remote_target::send_interrupt_sequence ()
4257 struct remote_state
*rs
= get_remote_state ();
4259 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4260 remote_serial_write ("\x03", 1);
4261 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4262 serial_send_break (rs
->remote_desc
);
4263 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4265 serial_send_break (rs
->remote_desc
);
4266 remote_serial_write ("g", 1);
4269 internal_error (__FILE__
, __LINE__
,
4270 _("Invalid value for interrupt_sequence_mode: %s."),
4271 interrupt_sequence_mode
);
4275 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4276 and extract the PTID. Returns NULL_PTID if not found. */
4279 stop_reply_extract_thread (char *stop_reply
)
4281 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4285 /* Txx r:val ; r:val (...) */
4288 /* Look for "register" named "thread". */
4293 p1
= strchr (p
, ':');
4297 if (strncmp (p
, "thread", p1
- p
) == 0)
4298 return read_ptid (++p1
, &p
);
4300 p1
= strchr (p
, ';');
4312 /* Determine the remote side's current thread. If we have a stop
4313 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4314 "thread" register we can extract the current thread from. If not,
4315 ask the remote which is the current thread with qC. The former
4316 method avoids a roundtrip. */
4319 remote_target::get_current_thread (char *wait_status
)
4321 ptid_t ptid
= null_ptid
;
4323 /* Note we don't use remote_parse_stop_reply as that makes use of
4324 the target architecture, which we haven't yet fully determined at
4326 if (wait_status
!= NULL
)
4327 ptid
= stop_reply_extract_thread (wait_status
);
4328 if (ptid
== null_ptid
)
4329 ptid
= remote_current_thread (inferior_ptid
);
4334 /* Query the remote target for which is the current thread/process,
4335 add it to our tables, and update INFERIOR_PTID. The caller is
4336 responsible for setting the state such that the remote end is ready
4337 to return the current thread.
4339 This function is called after handling the '?' or 'vRun' packets,
4340 whose response is a stop reply from which we can also try
4341 extracting the thread. If the target doesn't support the explicit
4342 qC query, we infer the current thread from that stop reply, passed
4343 in in WAIT_STATUS, which may be NULL. */
4346 remote_target::add_current_inferior_and_thread (char *wait_status
)
4348 struct remote_state
*rs
= get_remote_state ();
4349 bool fake_pid_p
= false;
4351 switch_to_no_thread ();
4353 /* Now, if we have thread information, update the current thread's
4355 ptid_t curr_ptid
= get_current_thread (wait_status
);
4357 if (curr_ptid
!= null_ptid
)
4359 if (!remote_multi_process_p (rs
))
4364 /* Without this, some commands which require an active target
4365 (such as kill) won't work. This variable serves (at least)
4366 double duty as both the pid of the target process (if it has
4367 such), and as a flag indicating that a target is active. */
4368 curr_ptid
= magic_null_ptid
;
4372 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4374 /* Add the main thread and switch to it. Don't try reading
4375 registers yet, since we haven't fetched the target description
4377 thread_info
*tp
= add_thread_silent (this, curr_ptid
);
4378 switch_to_thread_no_regs (tp
);
4381 /* Print info about a thread that was found already stopped on
4385 print_one_stopped_thread (struct thread_info
*thread
)
4387 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
4389 switch_to_thread (thread
);
4390 thread
->suspend
.stop_pc
= get_frame_pc (get_current_frame ());
4391 set_current_sal_from_frame (get_current_frame ());
4393 thread
->suspend
.waitstatus_pending_p
= 0;
4395 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
4397 enum gdb_signal sig
= ws
->value
.sig
;
4399 if (signal_print_state (sig
))
4400 gdb::observers::signal_received
.notify (sig
);
4402 gdb::observers::normal_stop
.notify (NULL
, 1);
4405 /* Process all initial stop replies the remote side sent in response
4406 to the ? packet. These indicate threads that were already stopped
4407 on initial connection. We mark these threads as stopped and print
4408 their current frame before giving the user the prompt. */
4411 remote_target::process_initial_stop_replies (int from_tty
)
4413 int pending_stop_replies
= stop_reply_queue_length ();
4414 struct thread_info
*selected
= NULL
;
4415 struct thread_info
*lowest_stopped
= NULL
;
4416 struct thread_info
*first
= NULL
;
4418 /* Consume the initial pending events. */
4419 while (pending_stop_replies
-- > 0)
4421 ptid_t waiton_ptid
= minus_one_ptid
;
4423 struct target_waitstatus ws
;
4424 int ignore_event
= 0;
4426 memset (&ws
, 0, sizeof (ws
));
4427 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4429 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4433 case TARGET_WAITKIND_IGNORE
:
4434 case TARGET_WAITKIND_NO_RESUMED
:
4435 case TARGET_WAITKIND_SIGNALLED
:
4436 case TARGET_WAITKIND_EXITED
:
4437 /* We shouldn't see these, but if we do, just ignore. */
4439 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
4443 case TARGET_WAITKIND_EXECD
:
4444 xfree (ws
.value
.execd_pathname
);
4453 thread_info
*evthread
= find_thread_ptid (this, event_ptid
);
4455 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4457 enum gdb_signal sig
= ws
.value
.sig
;
4459 /* Stubs traditionally report SIGTRAP as initial signal,
4460 instead of signal 0. Suppress it. */
4461 if (sig
== GDB_SIGNAL_TRAP
)
4463 evthread
->suspend
.stop_signal
= sig
;
4467 evthread
->suspend
.waitstatus
= ws
;
4469 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4470 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4471 evthread
->suspend
.waitstatus_pending_p
= 1;
4473 set_executing (this, event_ptid
, false);
4474 set_running (this, event_ptid
, false);
4475 get_remote_thread_info (evthread
)->vcont_resumed
= 0;
4478 /* "Notice" the new inferiors before anything related to
4479 registers/memory. */
4480 for (inferior
*inf
: all_non_exited_inferiors (this))
4482 inf
->needs_setup
= 1;
4486 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4487 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4492 /* If all-stop on top of non-stop, pause all threads. Note this
4493 records the threads' stop pc, so must be done after "noticing"
4497 stop_all_threads ();
4499 /* If all threads of an inferior were already stopped, we
4500 haven't setup the inferior yet. */
4501 for (inferior
*inf
: all_non_exited_inferiors (this))
4503 if (inf
->needs_setup
)
4505 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4506 switch_to_thread_no_regs (thread
);
4512 /* Now go over all threads that are stopped, and print their current
4513 frame. If all-stop, then if there's a signalled thread, pick
4515 for (thread_info
*thread
: all_non_exited_threads (this))
4521 thread
->set_running (false);
4522 else if (thread
->state
!= THREAD_STOPPED
)
4525 if (selected
== NULL
4526 && thread
->suspend
.waitstatus_pending_p
)
4529 if (lowest_stopped
== NULL
4530 || thread
->inf
->num
< lowest_stopped
->inf
->num
4531 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4532 lowest_stopped
= thread
;
4535 print_one_stopped_thread (thread
);
4538 /* In all-stop, we only print the status of one thread, and leave
4539 others with their status pending. */
4542 thread_info
*thread
= selected
;
4544 thread
= lowest_stopped
;
4548 print_one_stopped_thread (thread
);
4551 /* For "info program". */
4552 thread_info
*thread
= inferior_thread ();
4553 if (thread
->state
== THREAD_STOPPED
)
4554 set_last_target_status (this, inferior_ptid
, thread
->suspend
.waitstatus
);
4557 /* Start the remote connection and sync state. */
4560 remote_target::start_remote (int from_tty
, int extended_p
)
4562 struct remote_state
*rs
= get_remote_state ();
4563 struct packet_config
*noack_config
;
4564 char *wait_status
= NULL
;
4566 /* Signal other parts that we're going through the initial setup,
4567 and so things may not be stable yet. E.g., we don't try to
4568 install tracepoints until we've relocated symbols. Also, a
4569 Ctrl-C before we're connected and synced up can't interrupt the
4570 target. Instead, it offers to drop the (potentially wedged)
4572 rs
->starting_up
= 1;
4576 if (interrupt_on_connect
)
4577 send_interrupt_sequence ();
4579 /* Ack any packet which the remote side has already sent. */
4580 remote_serial_write ("+", 1);
4582 /* The first packet we send to the target is the optional "supported
4583 packets" request. If the target can answer this, it will tell us
4584 which later probes to skip. */
4585 remote_query_supported ();
4587 /* If the stub wants to get a QAllow, compose one and send it. */
4588 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4591 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4592 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4593 as a reply to known packet. For packet "vFile:setfs:" it is an
4594 invalid reply and GDB would return error in
4595 remote_hostio_set_filesystem, making remote files access impossible.
4596 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4597 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4599 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4601 putpkt (v_mustreplyempty
);
4602 getpkt (&rs
->buf
, 0);
4603 if (strcmp (rs
->buf
.data (), "OK") == 0)
4604 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4605 else if (strcmp (rs
->buf
.data (), "") != 0)
4606 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4610 /* Next, we possibly activate noack mode.
4612 If the QStartNoAckMode packet configuration is set to AUTO,
4613 enable noack mode if the stub reported a wish for it with
4616 If set to TRUE, then enable noack mode even if the stub didn't
4617 report it in qSupported. If the stub doesn't reply OK, the
4618 session ends with an error.
4620 If FALSE, then don't activate noack mode, regardless of what the
4621 stub claimed should be the default with qSupported. */
4623 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4624 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4626 putpkt ("QStartNoAckMode");
4627 getpkt (&rs
->buf
, 0);
4628 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4634 /* Tell the remote that we are using the extended protocol. */
4636 getpkt (&rs
->buf
, 0);
4639 /* Let the target know which signals it is allowed to pass down to
4641 update_signals_program_target ();
4643 /* Next, if the target can specify a description, read it. We do
4644 this before anything involving memory or registers. */
4645 target_find_description ();
4647 /* Next, now that we know something about the target, update the
4648 address spaces in the program spaces. */
4649 update_address_spaces ();
4651 /* On OSs where the list of libraries is global to all
4652 processes, we fetch them early. */
4653 if (gdbarch_has_global_solist (target_gdbarch ()))
4654 solib_add (NULL
, from_tty
, auto_solib_add
);
4656 if (target_is_non_stop_p ())
4658 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4659 error (_("Non-stop mode requested, but remote "
4660 "does not support non-stop"));
4662 putpkt ("QNonStop:1");
4663 getpkt (&rs
->buf
, 0);
4665 if (strcmp (rs
->buf
.data (), "OK") != 0)
4666 error (_("Remote refused setting non-stop mode with: %s"),
4669 /* Find about threads and processes the stub is already
4670 controlling. We default to adding them in the running state.
4671 The '?' query below will then tell us about which threads are
4673 this->update_thread_list ();
4675 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4677 /* Don't assume that the stub can operate in all-stop mode.
4678 Request it explicitly. */
4679 putpkt ("QNonStop:0");
4680 getpkt (&rs
->buf
, 0);
4682 if (strcmp (rs
->buf
.data (), "OK") != 0)
4683 error (_("Remote refused setting all-stop mode with: %s"),
4687 /* Upload TSVs regardless of whether the target is running or not. The
4688 remote stub, such as GDBserver, may have some predefined or builtin
4689 TSVs, even if the target is not running. */
4690 if (get_trace_status (current_trace_status ()) != -1)
4692 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4694 upload_trace_state_variables (&uploaded_tsvs
);
4695 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4698 /* Check whether the target is running now. */
4700 getpkt (&rs
->buf
, 0);
4702 if (!target_is_non_stop_p ())
4704 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4707 error (_("The target is not running (try extended-remote?)"));
4709 /* We're connected, but not running. Drop out before we
4710 call start_remote. */
4711 rs
->starting_up
= 0;
4716 /* Save the reply for later. */
4717 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4718 strcpy (wait_status
, rs
->buf
.data ());
4721 /* Fetch thread list. */
4722 target_update_thread_list ();
4724 /* Let the stub know that we want it to return the thread. */
4725 set_continue_thread (minus_one_ptid
);
4727 if (thread_count (this) == 0)
4729 /* Target has no concept of threads at all. GDB treats
4730 non-threaded target as single-threaded; add a main
4732 add_current_inferior_and_thread (wait_status
);
4736 /* We have thread information; select the thread the target
4737 says should be current. If we're reconnecting to a
4738 multi-threaded program, this will ideally be the thread
4739 that last reported an event before GDB disconnected. */
4740 ptid_t curr_thread
= get_current_thread (wait_status
);
4741 if (curr_thread
== null_ptid
)
4743 /* Odd... The target was able to list threads, but not
4744 tell us which thread was current (no "thread"
4745 register in T stop reply?). Just pick the first
4746 thread in the thread list then. */
4749 fprintf_unfiltered (gdb_stdlog
,
4750 "warning: couldn't determine remote "
4751 "current thread; picking first in list.\n");
4753 for (thread_info
*tp
: all_non_exited_threads (this,
4756 switch_to_thread (tp
);
4761 switch_to_thread (find_thread_ptid (this, curr_thread
));
4764 /* init_wait_for_inferior should be called before get_offsets in order
4765 to manage `inserted' flag in bp loc in a correct state.
4766 breakpoint_init_inferior, called from init_wait_for_inferior, set
4767 `inserted' flag to 0, while before breakpoint_re_set, called from
4768 start_remote, set `inserted' flag to 1. In the initialization of
4769 inferior, breakpoint_init_inferior should be called first, and then
4770 breakpoint_re_set can be called. If this order is broken, state of
4771 `inserted' flag is wrong, and cause some problems on breakpoint
4773 init_wait_for_inferior ();
4775 get_offsets (); /* Get text, data & bss offsets. */
4777 /* If we could not find a description using qXfer, and we know
4778 how to do it some other way, try again. This is not
4779 supported for non-stop; it could be, but it is tricky if
4780 there are no stopped threads when we connect. */
4781 if (remote_read_description_p (this)
4782 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4784 target_clear_description ();
4785 target_find_description ();
4788 /* Use the previously fetched status. */
4789 gdb_assert (wait_status
!= NULL
);
4790 strcpy (rs
->buf
.data (), wait_status
);
4791 rs
->cached_wait_status
= 1;
4793 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4797 /* Clear WFI global state. Do this before finding about new
4798 threads and inferiors, and setting the current inferior.
4799 Otherwise we would clear the proceed status of the current
4800 inferior when we want its stop_soon state to be preserved
4801 (see notice_new_inferior). */
4802 init_wait_for_inferior ();
4804 /* In non-stop, we will either get an "OK", meaning that there
4805 are no stopped threads at this time; or, a regular stop
4806 reply. In the latter case, there may be more than one thread
4807 stopped --- we pull them all out using the vStopped
4809 if (strcmp (rs
->buf
.data (), "OK") != 0)
4811 struct notif_client
*notif
= ¬if_client_stop
;
4813 /* remote_notif_get_pending_replies acks this one, and gets
4815 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4816 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4817 remote_notif_get_pending_events (notif
);
4820 if (thread_count (this) == 0)
4823 error (_("The target is not running (try extended-remote?)"));
4825 /* We're connected, but not running. Drop out before we
4826 call start_remote. */
4827 rs
->starting_up
= 0;
4831 /* In non-stop mode, any cached wait status will be stored in
4832 the stop reply queue. */
4833 gdb_assert (wait_status
== NULL
);
4835 /* Report all signals during attach/startup. */
4838 /* If there are already stopped threads, mark them stopped and
4839 report their stops before giving the prompt to the user. */
4840 process_initial_stop_replies (from_tty
);
4842 if (target_can_async_p ())
4846 /* If we connected to a live target, do some additional setup. */
4847 if (target_has_execution ())
4849 /* No use without a symbol-file. */
4850 if (current_program_space
->symfile_object_file
)
4851 remote_check_symbols ();
4854 /* Possibly the target has been engaged in a trace run started
4855 previously; find out where things are at. */
4856 if (get_trace_status (current_trace_status ()) != -1)
4858 struct uploaded_tp
*uploaded_tps
= NULL
;
4860 if (current_trace_status ()->running
)
4861 printf_filtered (_("Trace is already running on the target.\n"));
4863 upload_tracepoints (&uploaded_tps
);
4865 merge_uploaded_tracepoints (&uploaded_tps
);
4868 /* Possibly the target has been engaged in a btrace record started
4869 previously; find out where things are at. */
4870 remote_btrace_maybe_reopen ();
4872 /* The thread and inferior lists are now synchronized with the
4873 target, our symbols have been relocated, and we're merged the
4874 target's tracepoints with ours. We're done with basic start
4876 rs
->starting_up
= 0;
4878 /* Maybe breakpoints are global and need to be inserted now. */
4879 if (breakpoints_should_be_inserted_now ())
4880 insert_breakpoints ();
4884 remote_target::connection_string ()
4886 remote_state
*rs
= get_remote_state ();
4888 if (rs
->remote_desc
->name
!= NULL
)
4889 return rs
->remote_desc
->name
;
4894 /* Open a connection to a remote debugger.
4895 NAME is the filename used for communication. */
4898 remote_target::open (const char *name
, int from_tty
)
4900 open_1 (name
, from_tty
, 0);
4903 /* Open a connection to a remote debugger using the extended
4904 remote gdb protocol. NAME is the filename used for communication. */
4907 extended_remote_target::open (const char *name
, int from_tty
)
4909 open_1 (name
, from_tty
, 1 /*extended_p */);
4912 /* Reset all packets back to "unknown support". Called when opening a
4913 new connection to a remote target. */
4916 reset_all_packet_configs_support (void)
4920 for (i
= 0; i
< PACKET_MAX
; i
++)
4921 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4924 /* Initialize all packet configs. */
4927 init_all_packet_configs (void)
4931 for (i
= 0; i
< PACKET_MAX
; i
++)
4933 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4934 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4938 /* Symbol look-up. */
4941 remote_target::remote_check_symbols ()
4946 /* The remote side has no concept of inferiors that aren't running
4947 yet, it only knows about running processes. If we're connected
4948 but our current inferior is not running, we should not invite the
4949 remote target to request symbol lookups related to its
4950 (unrelated) current process. */
4951 if (!target_has_execution ())
4954 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4957 /* Make sure the remote is pointing at the right process. Note
4958 there's no way to select "no process". */
4959 set_general_process ();
4961 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4962 because we need both at the same time. */
4963 gdb::char_vector
msg (get_remote_packet_size ());
4964 gdb::char_vector
reply (get_remote_packet_size ());
4966 /* Invite target to request symbol lookups. */
4968 putpkt ("qSymbol::");
4970 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4972 while (startswith (reply
.data (), "qSymbol:"))
4974 struct bound_minimal_symbol sym
;
4977 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
4980 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
4981 if (sym
.minsym
== NULL
)
4982 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
4986 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4987 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4989 /* If this is a function address, return the start of code
4990 instead of any data function descriptor. */
4991 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4993 current_top_target ());
4995 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
4996 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4999 putpkt (msg
.data ());
5004 static struct serial
*
5005 remote_serial_open (const char *name
)
5007 static int udp_warning
= 0;
5009 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
5010 of in ser-tcp.c, because it is the remote protocol assuming that the
5011 serial connection is reliable and not the serial connection promising
5013 if (!udp_warning
&& startswith (name
, "udp:"))
5015 warning (_("The remote protocol may be unreliable over UDP.\n"
5016 "Some events may be lost, rendering further debugging "
5021 return serial_open (name
);
5024 /* Inform the target of our permission settings. The permission flags
5025 work without this, but if the target knows the settings, it can do
5026 a couple things. First, it can add its own check, to catch cases
5027 that somehow manage to get by the permissions checks in target
5028 methods. Second, if the target is wired to disallow particular
5029 settings (for instance, a system in the field that is not set up to
5030 be able to stop at a breakpoint), it can object to any unavailable
5034 remote_target::set_permissions ()
5036 struct remote_state
*rs
= get_remote_state ();
5038 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
5039 "WriteReg:%x;WriteMem:%x;"
5040 "InsertBreak:%x;InsertTrace:%x;"
5041 "InsertFastTrace:%x;Stop:%x",
5042 may_write_registers
, may_write_memory
,
5043 may_insert_breakpoints
, may_insert_tracepoints
,
5044 may_insert_fast_tracepoints
, may_stop
);
5046 getpkt (&rs
->buf
, 0);
5048 /* If the target didn't like the packet, warn the user. Do not try
5049 to undo the user's settings, that would just be maddening. */
5050 if (strcmp (rs
->buf
.data (), "OK") != 0)
5051 warning (_("Remote refused setting permissions with: %s"),
5055 /* This type describes each known response to the qSupported
5057 struct protocol_feature
5059 /* The name of this protocol feature. */
5062 /* The default for this protocol feature. */
5063 enum packet_support default_support
;
5065 /* The function to call when this feature is reported, or after
5066 qSupported processing if the feature is not supported.
5067 The first argument points to this structure. The second
5068 argument indicates whether the packet requested support be
5069 enabled, disabled, or probed (or the default, if this function
5070 is being called at the end of processing and this feature was
5071 not reported). The third argument may be NULL; if not NULL, it
5072 is a NUL-terminated string taken from the packet following
5073 this feature's name and an equals sign. */
5074 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5075 enum packet_support
, const char *);
5077 /* The corresponding packet for this feature. Only used if
5078 FUNC is remote_supported_packet. */
5083 remote_supported_packet (remote_target
*remote
,
5084 const struct protocol_feature
*feature
,
5085 enum packet_support support
,
5086 const char *argument
)
5090 warning (_("Remote qSupported response supplied an unexpected value for"
5091 " \"%s\"."), feature
->name
);
5095 remote_protocol_packets
[feature
->packet
].support
= support
;
5099 remote_target::remote_packet_size (const protocol_feature
*feature
,
5100 enum packet_support support
, const char *value
)
5102 struct remote_state
*rs
= get_remote_state ();
5107 if (support
!= PACKET_ENABLE
)
5110 if (value
== NULL
|| *value
== '\0')
5112 warning (_("Remote target reported \"%s\" without a size."),
5118 packet_size
= strtol (value
, &value_end
, 16);
5119 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5121 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5122 feature
->name
, value
);
5126 /* Record the new maximum packet size. */
5127 rs
->explicit_packet_size
= packet_size
;
5131 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5132 enum packet_support support
, const char *value
)
5134 remote
->remote_packet_size (feature
, support
, value
);
5137 static const struct protocol_feature remote_protocol_features
[] = {
5138 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5139 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5140 PACKET_qXfer_auxv
},
5141 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5142 PACKET_qXfer_exec_file
},
5143 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5144 PACKET_qXfer_features
},
5145 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5146 PACKET_qXfer_libraries
},
5147 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5148 PACKET_qXfer_libraries_svr4
},
5149 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5150 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5151 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5152 PACKET_qXfer_memory_map
},
5153 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5154 PACKET_qXfer_osdata
},
5155 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5156 PACKET_qXfer_threads
},
5157 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5158 PACKET_qXfer_traceframe_info
},
5159 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5160 PACKET_QPassSignals
},
5161 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5162 PACKET_QCatchSyscalls
},
5163 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5164 PACKET_QProgramSignals
},
5165 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5166 PACKET_QSetWorkingDir
},
5167 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5168 PACKET_QStartupWithShell
},
5169 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5170 PACKET_QEnvironmentHexEncoded
},
5171 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5172 PACKET_QEnvironmentReset
},
5173 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5174 PACKET_QEnvironmentUnset
},
5175 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5176 PACKET_QStartNoAckMode
},
5177 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5178 PACKET_multiprocess_feature
},
5179 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5180 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5181 PACKET_qXfer_siginfo_read
},
5182 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5183 PACKET_qXfer_siginfo_write
},
5184 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5185 PACKET_ConditionalTracepoints
},
5186 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5187 PACKET_ConditionalBreakpoints
},
5188 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5189 PACKET_BreakpointCommands
},
5190 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5191 PACKET_FastTracepoints
},
5192 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5193 PACKET_StaticTracepoints
},
5194 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5195 PACKET_InstallInTrace
},
5196 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5197 PACKET_DisconnectedTracing_feature
},
5198 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5200 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5202 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5203 PACKET_TracepointSource
},
5204 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5206 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5207 PACKET_EnableDisableTracepoints_feature
},
5208 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5209 PACKET_qXfer_fdpic
},
5210 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5212 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5213 PACKET_QDisableRandomization
},
5214 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5215 { "QTBuffer:size", PACKET_DISABLE
,
5216 remote_supported_packet
, PACKET_QTBuffer_size
},
5217 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5218 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5219 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5220 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5221 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5222 PACKET_qXfer_btrace
},
5223 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5224 PACKET_qXfer_btrace_conf
},
5225 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5226 PACKET_Qbtrace_conf_bts_size
},
5227 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5228 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5229 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5230 PACKET_fork_event_feature
},
5231 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5232 PACKET_vfork_event_feature
},
5233 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5234 PACKET_exec_event_feature
},
5235 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5236 PACKET_Qbtrace_conf_pt_size
},
5237 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5238 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5239 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5242 static char *remote_support_xml
;
5244 /* Register string appended to "xmlRegisters=" in qSupported query. */
5247 register_remote_support_xml (const char *xml
)
5249 #if defined(HAVE_LIBEXPAT)
5250 if (remote_support_xml
== NULL
)
5251 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5254 char *copy
= xstrdup (remote_support_xml
+ 13);
5256 char *p
= strtok_r (copy
, ",", &saveptr
);
5260 if (strcmp (p
, xml
) == 0)
5267 while ((p
= strtok_r (NULL
, ",", &saveptr
)) != NULL
);
5270 remote_support_xml
= reconcat (remote_support_xml
,
5271 remote_support_xml
, ",", xml
,
5278 remote_query_supported_append (std::string
*msg
, const char *append
)
5282 msg
->append (append
);
5286 remote_target::remote_query_supported ()
5288 struct remote_state
*rs
= get_remote_state ();
5291 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5293 /* The packet support flags are handled differently for this packet
5294 than for most others. We treat an error, a disabled packet, and
5295 an empty response identically: any features which must be reported
5296 to be used will be automatically disabled. An empty buffer
5297 accomplishes this, since that is also the representation for a list
5298 containing no features. */
5301 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5305 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5306 remote_query_supported_append (&q
, "multiprocess+");
5308 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5309 remote_query_supported_append (&q
, "swbreak+");
5310 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5311 remote_query_supported_append (&q
, "hwbreak+");
5313 remote_query_supported_append (&q
, "qRelocInsn+");
5315 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5316 != AUTO_BOOLEAN_FALSE
)
5317 remote_query_supported_append (&q
, "fork-events+");
5318 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5319 != AUTO_BOOLEAN_FALSE
)
5320 remote_query_supported_append (&q
, "vfork-events+");
5321 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5322 != AUTO_BOOLEAN_FALSE
)
5323 remote_query_supported_append (&q
, "exec-events+");
5325 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5326 remote_query_supported_append (&q
, "vContSupported+");
5328 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5329 remote_query_supported_append (&q
, "QThreadEvents+");
5331 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5332 remote_query_supported_append (&q
, "no-resumed+");
5334 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5335 the qSupported:xmlRegisters=i386 handling. */
5336 if (remote_support_xml
!= NULL
5337 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5338 remote_query_supported_append (&q
, remote_support_xml
);
5340 q
= "qSupported:" + q
;
5341 putpkt (q
.c_str ());
5343 getpkt (&rs
->buf
, 0);
5345 /* If an error occured, warn, but do not return - just reset the
5346 buffer to empty and go on to disable features. */
5347 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5350 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5355 memset (seen
, 0, sizeof (seen
));
5357 next
= rs
->buf
.data ();
5360 enum packet_support is_supported
;
5361 char *p
, *end
, *name_end
, *value
;
5363 /* First separate out this item from the rest of the packet. If
5364 there's another item after this, we overwrite the separator
5365 (terminated strings are much easier to work with). */
5367 end
= strchr (p
, ';');
5370 end
= p
+ strlen (p
);
5380 warning (_("empty item in \"qSupported\" response"));
5385 name_end
= strchr (p
, '=');
5388 /* This is a name=value entry. */
5389 is_supported
= PACKET_ENABLE
;
5390 value
= name_end
+ 1;
5399 is_supported
= PACKET_ENABLE
;
5403 is_supported
= PACKET_DISABLE
;
5407 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5411 warning (_("unrecognized item \"%s\" "
5412 "in \"qSupported\" response"), p
);
5418 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5419 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5421 const struct protocol_feature
*feature
;
5424 feature
= &remote_protocol_features
[i
];
5425 feature
->func (this, feature
, is_supported
, value
);
5430 /* If we increased the packet size, make sure to increase the global
5431 buffer size also. We delay this until after parsing the entire
5432 qSupported packet, because this is the same buffer we were
5434 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5435 rs
->buf
.resize (rs
->explicit_packet_size
);
5437 /* Handle the defaults for unmentioned features. */
5438 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5441 const struct protocol_feature
*feature
;
5443 feature
= &remote_protocol_features
[i
];
5444 feature
->func (this, feature
, feature
->default_support
, NULL
);
5448 /* Serial QUIT handler for the remote serial descriptor.
5450 Defers handling a Ctrl-C until we're done with the current
5451 command/response packet sequence, unless:
5453 - We're setting up the connection. Don't send a remote interrupt
5454 request, as we're not fully synced yet. Quit immediately
5457 - The target has been resumed in the foreground
5458 (target_terminal::is_ours is false) with a synchronous resume
5459 packet, and we're blocked waiting for the stop reply, thus a
5460 Ctrl-C should be immediately sent to the target.
5462 - We get a second Ctrl-C while still within the same serial read or
5463 write. In that case the serial is seemingly wedged --- offer to
5466 - We see a second Ctrl-C without target response, after having
5467 previously interrupted the target. In that case the target/stub
5468 is probably wedged --- offer to quit/disconnect.
5472 remote_target::remote_serial_quit_handler ()
5474 struct remote_state
*rs
= get_remote_state ();
5476 if (check_quit_flag ())
5478 /* If we're starting up, we're not fully synced yet. Quit
5480 if (rs
->starting_up
)
5482 else if (rs
->got_ctrlc_during_io
)
5484 if (query (_("The target is not responding to GDB commands.\n"
5485 "Stop debugging it? ")))
5486 remote_unpush_and_throw (this);
5488 /* If ^C has already been sent once, offer to disconnect. */
5489 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5491 /* All-stop protocol, and blocked waiting for stop reply. Send
5492 an interrupt request. */
5493 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5494 target_interrupt ();
5496 rs
->got_ctrlc_during_io
= 1;
5500 /* The remote_target that is current while the quit handler is
5501 overridden with remote_serial_quit_handler. */
5502 static remote_target
*curr_quit_handler_target
;
5505 remote_serial_quit_handler ()
5507 curr_quit_handler_target
->remote_serial_quit_handler ();
5510 /* Remove the remote target from the target stack of each inferior
5511 that is using it. Upper targets depend on it so remove them
5515 remote_unpush_target (remote_target
*target
)
5517 /* We have to unpush the target from all inferiors, even those that
5519 scoped_restore_current_inferior restore_current_inferior
;
5521 for (inferior
*inf
: all_inferiors (target
))
5523 switch_to_inferior_no_thread (inf
);
5524 pop_all_targets_at_and_above (process_stratum
);
5525 generic_mourn_inferior ();
5530 remote_unpush_and_throw (remote_target
*target
)
5532 remote_unpush_target (target
);
5533 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5537 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5539 remote_target
*curr_remote
= get_current_remote_target ();
5542 error (_("To open a remote debug connection, you need to specify what\n"
5543 "serial device is attached to the remote system\n"
5544 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5546 /* If we're connected to a running target, target_preopen will kill it.
5547 Ask this question first, before target_preopen has a chance to kill
5549 if (curr_remote
!= NULL
&& !target_has_execution ())
5552 && !query (_("Already connected to a remote target. Disconnect? ")))
5553 error (_("Still connected."));
5556 /* Here the possibly existing remote target gets unpushed. */
5557 target_preopen (from_tty
);
5559 remote_fileio_reset ();
5560 reopen_exec_file ();
5563 remote_target
*remote
5564 = (extended_p
? new extended_remote_target () : new remote_target ());
5565 target_ops_up
target_holder (remote
);
5567 remote_state
*rs
= remote
->get_remote_state ();
5569 /* See FIXME above. */
5570 if (!target_async_permitted
)
5571 rs
->wait_forever_enabled_p
= 1;
5573 rs
->remote_desc
= remote_serial_open (name
);
5574 if (!rs
->remote_desc
)
5575 perror_with_name (name
);
5577 if (baud_rate
!= -1)
5579 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5581 /* The requested speed could not be set. Error out to
5582 top level after closing remote_desc. Take care to
5583 set remote_desc to NULL to avoid closing remote_desc
5585 serial_close (rs
->remote_desc
);
5586 rs
->remote_desc
= NULL
;
5587 perror_with_name (name
);
5591 serial_setparity (rs
->remote_desc
, serial_parity
);
5592 serial_raw (rs
->remote_desc
);
5594 /* If there is something sitting in the buffer we might take it as a
5595 response to a command, which would be bad. */
5596 serial_flush_input (rs
->remote_desc
);
5600 puts_filtered ("Remote debugging using ");
5601 puts_filtered (name
);
5602 puts_filtered ("\n");
5605 /* Switch to using the remote target now. */
5606 push_target (std::move (target_holder
));
5608 /* Register extra event sources in the event loop. */
5609 rs
->remote_async_inferior_event_token
5610 = create_async_event_handler (remote_async_inferior_event_handler
, remote
,
5612 rs
->notif_state
= remote_notif_state_allocate (remote
);
5614 /* Reset the target state; these things will be queried either by
5615 remote_query_supported or as they are needed. */
5616 reset_all_packet_configs_support ();
5617 rs
->cached_wait_status
= 0;
5618 rs
->explicit_packet_size
= 0;
5620 rs
->extended
= extended_p
;
5621 rs
->waiting_for_stop_reply
= 0;
5622 rs
->ctrlc_pending_p
= 0;
5623 rs
->got_ctrlc_during_io
= 0;
5625 rs
->general_thread
= not_sent_ptid
;
5626 rs
->continue_thread
= not_sent_ptid
;
5627 rs
->remote_traceframe_number
= -1;
5629 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5631 /* Probe for ability to use "ThreadInfo" query, as required. */
5632 rs
->use_threadinfo_query
= 1;
5633 rs
->use_threadextra_query
= 1;
5635 rs
->readahead_cache
.invalidate ();
5637 if (target_async_permitted
)
5639 /* FIXME: cagney/1999-09-23: During the initial connection it is
5640 assumed that the target is already ready and able to respond to
5641 requests. Unfortunately remote_start_remote() eventually calls
5642 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5643 around this. Eventually a mechanism that allows
5644 wait_for_inferior() to expect/get timeouts will be
5646 rs
->wait_forever_enabled_p
= 0;
5649 /* First delete any symbols previously loaded from shared libraries. */
5650 no_shared_libraries (NULL
, 0);
5652 /* Start the remote connection. If error() or QUIT, discard this
5653 target (we'd otherwise be in an inconsistent state) and then
5654 propogate the error on up the exception chain. This ensures that
5655 the caller doesn't stumble along blindly assuming that the
5656 function succeeded. The CLI doesn't have this problem but other
5657 UI's, such as MI do.
5659 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5660 this function should return an error indication letting the
5661 caller restore the previous state. Unfortunately the command
5662 ``target remote'' is directly wired to this function making that
5663 impossible. On a positive note, the CLI side of this problem has
5664 been fixed - the function set_cmd_context() makes it possible for
5665 all the ``target ....'' commands to share a common callback
5666 function. See cli-dump.c. */
5671 remote
->start_remote (from_tty
, extended_p
);
5673 catch (const gdb_exception
&ex
)
5675 /* Pop the partially set up target - unless something else did
5676 already before throwing the exception. */
5677 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5678 remote_unpush_target (remote
);
5683 remote_btrace_reset (rs
);
5685 if (target_async_permitted
)
5686 rs
->wait_forever_enabled_p
= 1;
5689 /* Detach the specified process. */
5692 remote_target::remote_detach_pid (int pid
)
5694 struct remote_state
*rs
= get_remote_state ();
5696 /* This should not be necessary, but the handling for D;PID in
5697 GDBserver versions prior to 8.2 incorrectly assumes that the
5698 selected process points to the same process we're detaching,
5699 leading to misbehavior (and possibly GDBserver crashing) when it
5700 does not. Since it's easy and cheap, work around it by forcing
5701 GDBserver to select GDB's current process. */
5702 set_general_process ();
5704 if (remote_multi_process_p (rs
))
5705 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5707 strcpy (rs
->buf
.data (), "D");
5710 getpkt (&rs
->buf
, 0);
5712 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5714 else if (rs
->buf
[0] == '\0')
5715 error (_("Remote doesn't know how to detach"));
5717 error (_("Can't detach process."));
5720 /* This detaches a program to which we previously attached, using
5721 inferior_ptid to identify the process. After this is done, GDB
5722 can be used to debug some other program. We better not have left
5723 any breakpoints in the target program or it'll die when it hits
5727 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5729 int pid
= inferior_ptid
.pid ();
5730 struct remote_state
*rs
= get_remote_state ();
5733 if (!target_has_execution ())
5734 error (_("No process to detach from."));
5736 target_announce_detach (from_tty
);
5738 /* Tell the remote target to detach. */
5739 remote_detach_pid (pid
);
5741 /* Exit only if this is the only active inferior. */
5742 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors (this) == 1)
5743 puts_filtered (_("Ending remote debugging.\n"));
5745 thread_info
*tp
= find_thread_ptid (this, inferior_ptid
);
5747 /* Check to see if we are detaching a fork parent. Note that if we
5748 are detaching a fork child, tp == NULL. */
5749 is_fork_parent
= (tp
!= NULL
5750 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5752 /* If doing detach-on-fork, we don't mourn, because that will delete
5753 breakpoints that should be available for the followed inferior. */
5754 if (!is_fork_parent
)
5756 /* Save the pid as a string before mourning, since that will
5757 unpush the remote target, and we need the string after. */
5758 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5760 target_mourn_inferior (inferior_ptid
);
5761 if (print_inferior_events
)
5762 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5763 inf
->num
, infpid
.c_str ());
5767 switch_to_no_thread ();
5768 detach_inferior (current_inferior ());
5773 remote_target::detach (inferior
*inf
, int from_tty
)
5775 remote_detach_1 (inf
, from_tty
);
5779 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5781 remote_detach_1 (inf
, from_tty
);
5784 /* Target follow-fork function for remote targets. On entry, and
5785 at return, the current inferior is the fork parent.
5787 Note that although this is currently only used for extended-remote,
5788 it is named remote_follow_fork in anticipation of using it for the
5789 remote target as well. */
5792 remote_target::follow_fork (bool follow_child
, bool detach_fork
)
5794 struct remote_state
*rs
= get_remote_state ();
5795 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5797 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5798 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5800 /* When following the parent and detaching the child, we detach
5801 the child here. For the case of following the child and
5802 detaching the parent, the detach is done in the target-
5803 independent follow fork code in infrun.c. We can't use
5804 target_detach when detaching an unfollowed child because
5805 the client side doesn't know anything about the child. */
5806 if (detach_fork
&& !follow_child
)
5808 /* Detach the fork child. */
5812 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5813 child_pid
= child_ptid
.pid ();
5815 remote_detach_pid (child_pid
);
5822 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5823 in the program space of the new inferior. On entry and at return the
5824 current inferior is the exec'ing inferior. INF is the new exec'd
5825 inferior, which may be the same as the exec'ing inferior unless
5826 follow-exec-mode is "new". */
5829 remote_target::follow_exec (struct inferior
*inf
, const char *execd_pathname
)
5831 /* We know that this is a target file name, so if it has the "target:"
5832 prefix we strip it off before saving it in the program space. */
5833 if (is_target_filename (execd_pathname
))
5834 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5836 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5839 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5842 remote_target::disconnect (const char *args
, int from_tty
)
5845 error (_("Argument given to \"disconnect\" when remotely debugging."));
5847 /* Make sure we unpush even the extended remote targets. Calling
5848 target_mourn_inferior won't unpush, and
5849 remote_target::mourn_inferior won't unpush if there is more than
5850 one inferior left. */
5851 remote_unpush_target (this);
5854 puts_filtered ("Ending remote debugging.\n");
5857 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5858 be chatty about it. */
5861 extended_remote_target::attach (const char *args
, int from_tty
)
5863 struct remote_state
*rs
= get_remote_state ();
5865 char *wait_status
= NULL
;
5867 pid
= parse_pid_to_attach (args
);
5869 /* Remote PID can be freely equal to getpid, do not check it here the same
5870 way as in other targets. */
5872 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5873 error (_("This target does not support attaching to a process"));
5877 const char *exec_file
= get_exec_file (0);
5880 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5881 target_pid_to_str (ptid_t (pid
)).c_str ());
5883 printf_unfiltered (_("Attaching to %s\n"),
5884 target_pid_to_str (ptid_t (pid
)).c_str ());
5887 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
5889 getpkt (&rs
->buf
, 0);
5891 switch (packet_ok (rs
->buf
,
5892 &remote_protocol_packets
[PACKET_vAttach
]))
5895 if (!target_is_non_stop_p ())
5897 /* Save the reply for later. */
5898 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
5899 strcpy (wait_status
, rs
->buf
.data ());
5901 else if (strcmp (rs
->buf
.data (), "OK") != 0)
5902 error (_("Attaching to %s failed with: %s"),
5903 target_pid_to_str (ptid_t (pid
)).c_str (),
5906 case PACKET_UNKNOWN
:
5907 error (_("This target does not support attaching to a process"));
5909 error (_("Attaching to %s failed"),
5910 target_pid_to_str (ptid_t (pid
)).c_str ());
5913 switch_to_inferior_no_thread (remote_add_inferior (false, pid
, 1, 0));
5915 inferior_ptid
= ptid_t (pid
);
5917 if (target_is_non_stop_p ())
5919 /* Get list of threads. */
5920 update_thread_list ();
5922 thread_info
*thread
= first_thread_of_inferior (current_inferior ());
5923 if (thread
!= nullptr)
5924 switch_to_thread (thread
);
5926 /* Invalidate our notion of the remote current thread. */
5927 record_currthread (rs
, minus_one_ptid
);
5931 /* Now, if we have thread information, update the main thread's
5933 ptid_t curr_ptid
= remote_current_thread (ptid_t (pid
));
5935 /* Add the main thread to the thread list. */
5936 thread_info
*thr
= add_thread_silent (this, curr_ptid
);
5938 switch_to_thread (thr
);
5940 /* Don't consider the thread stopped until we've processed the
5941 saved stop reply. */
5942 set_executing (this, thr
->ptid
, true);
5945 /* Next, if the target can specify a description, read it. We do
5946 this before anything involving memory or registers. */
5947 target_find_description ();
5949 if (!target_is_non_stop_p ())
5951 /* Use the previously fetched status. */
5952 gdb_assert (wait_status
!= NULL
);
5954 if (target_can_async_p ())
5956 struct notif_event
*reply
5957 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
5959 push_stop_reply ((struct stop_reply
*) reply
);
5965 gdb_assert (wait_status
!= NULL
);
5966 strcpy (rs
->buf
.data (), wait_status
);
5967 rs
->cached_wait_status
= 1;
5971 gdb_assert (wait_status
== NULL
);
5974 /* Implementation of the to_post_attach method. */
5977 extended_remote_target::post_attach (int pid
)
5979 /* Get text, data & bss offsets. */
5982 /* In certain cases GDB might not have had the chance to start
5983 symbol lookup up until now. This could happen if the debugged
5984 binary is not using shared libraries, the vsyscall page is not
5985 present (on Linux) and the binary itself hadn't changed since the
5986 debugging process was started. */
5987 if (current_program_space
->symfile_object_file
!= NULL
)
5988 remote_check_symbols();
5992 /* Check for the availability of vCont. This function should also check
5996 remote_target::remote_vcont_probe ()
5998 remote_state
*rs
= get_remote_state ();
6001 strcpy (rs
->buf
.data (), "vCont?");
6003 getpkt (&rs
->buf
, 0);
6004 buf
= rs
->buf
.data ();
6006 /* Make sure that the features we assume are supported. */
6007 if (startswith (buf
, "vCont"))
6010 int support_c
, support_C
;
6012 rs
->supports_vCont
.s
= 0;
6013 rs
->supports_vCont
.S
= 0;
6016 rs
->supports_vCont
.t
= 0;
6017 rs
->supports_vCont
.r
= 0;
6018 while (p
&& *p
== ';')
6021 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6022 rs
->supports_vCont
.s
= 1;
6023 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6024 rs
->supports_vCont
.S
= 1;
6025 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6027 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6029 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6030 rs
->supports_vCont
.t
= 1;
6031 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6032 rs
->supports_vCont
.r
= 1;
6034 p
= strchr (p
, ';');
6037 /* If c, and C are not all supported, we can't use vCont. Clearing
6038 BUF will make packet_ok disable the packet. */
6039 if (!support_c
|| !support_C
)
6043 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
6044 rs
->supports_vCont_probed
= true;
6047 /* Helper function for building "vCont" resumptions. Write a
6048 resumption to P. ENDP points to one-passed-the-end of the buffer
6049 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6050 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6051 resumed thread should be single-stepped and/or signalled. If PTID
6052 equals minus_one_ptid, then all threads are resumed; if PTID
6053 represents a process, then all threads of the process are resumed;
6054 the thread to be stepped and/or signalled is given in the global
6058 remote_target::append_resumption (char *p
, char *endp
,
6059 ptid_t ptid
, int step
, gdb_signal siggnal
)
6061 struct remote_state
*rs
= get_remote_state ();
6063 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6064 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6066 /* GDB is willing to range step. */
6067 && use_range_stepping
6068 /* Target supports range stepping. */
6069 && rs
->supports_vCont
.r
6070 /* We don't currently support range stepping multiple
6071 threads with a wildcard (though the protocol allows it,
6072 so stubs shouldn't make an active effort to forbid
6074 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6076 struct thread_info
*tp
;
6078 if (ptid
== minus_one_ptid
)
6080 /* If we don't know about the target thread's tid, then
6081 we're resuming magic_null_ptid (see caller). */
6082 tp
= find_thread_ptid (this, magic_null_ptid
);
6085 tp
= find_thread_ptid (this, ptid
);
6086 gdb_assert (tp
!= NULL
);
6088 if (tp
->control
.may_range_step
)
6090 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6092 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6093 phex_nz (tp
->control
.step_range_start
,
6095 phex_nz (tp
->control
.step_range_end
,
6099 p
+= xsnprintf (p
, endp
- p
, ";s");
6102 p
+= xsnprintf (p
, endp
- p
, ";s");
6103 else if (siggnal
!= GDB_SIGNAL_0
)
6104 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6106 p
+= xsnprintf (p
, endp
- p
, ";c");
6108 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6112 /* All (-1) threads of process. */
6113 nptid
= ptid_t (ptid
.pid (), -1, 0);
6115 p
+= xsnprintf (p
, endp
- p
, ":");
6116 p
= write_ptid (p
, endp
, nptid
);
6118 else if (ptid
!= minus_one_ptid
)
6120 p
+= xsnprintf (p
, endp
- p
, ":");
6121 p
= write_ptid (p
, endp
, ptid
);
6127 /* Clear the thread's private info on resume. */
6130 resume_clear_thread_private_info (struct thread_info
*thread
)
6132 if (thread
->priv
!= NULL
)
6134 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6136 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6137 priv
->watch_data_address
= 0;
6141 /* Append a vCont continue-with-signal action for threads that have a
6142 non-zero stop signal. */
6145 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6148 for (thread_info
*thread
: all_non_exited_threads (this, ptid
))
6149 if (inferior_ptid
!= thread
->ptid
6150 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
6152 p
= append_resumption (p
, endp
, thread
->ptid
,
6153 0, thread
->suspend
.stop_signal
);
6154 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
6155 resume_clear_thread_private_info (thread
);
6161 /* Set the target running, using the packets that use Hc
6165 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6168 struct remote_state
*rs
= get_remote_state ();
6171 rs
->last_sent_signal
= siggnal
;
6172 rs
->last_sent_step
= step
;
6174 /* The c/s/C/S resume packets use Hc, so set the continue
6176 if (ptid
== minus_one_ptid
)
6177 set_continue_thread (any_thread_ptid
);
6179 set_continue_thread (ptid
);
6181 for (thread_info
*thread
: all_non_exited_threads (this))
6182 resume_clear_thread_private_info (thread
);
6184 buf
= rs
->buf
.data ();
6185 if (::execution_direction
== EXEC_REVERSE
)
6187 /* We don't pass signals to the target in reverse exec mode. */
6188 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6189 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6192 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6193 error (_("Remote reverse-step not supported."));
6194 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6195 error (_("Remote reverse-continue not supported."));
6197 strcpy (buf
, step
? "bs" : "bc");
6199 else if (siggnal
!= GDB_SIGNAL_0
)
6201 buf
[0] = step
? 'S' : 'C';
6202 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6203 buf
[2] = tohex (((int) siggnal
) & 0xf);
6207 strcpy (buf
, step
? "s" : "c");
6212 /* Resume the remote inferior by using a "vCont" packet. The thread
6213 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6214 resumed thread should be single-stepped and/or signalled. If PTID
6215 equals minus_one_ptid, then all threads are resumed; the thread to
6216 be stepped and/or signalled is given in the global INFERIOR_PTID.
6217 This function returns non-zero iff it resumes the inferior.
6219 This function issues a strict subset of all possible vCont commands
6223 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6224 enum gdb_signal siggnal
)
6226 struct remote_state
*rs
= get_remote_state ();
6230 /* No reverse execution actions defined for vCont. */
6231 if (::execution_direction
== EXEC_REVERSE
)
6234 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6235 remote_vcont_probe ();
6237 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6240 p
= rs
->buf
.data ();
6241 endp
= p
+ get_remote_packet_size ();
6243 /* If we could generate a wider range of packets, we'd have to worry
6244 about overflowing BUF. Should there be a generic
6245 "multi-part-packet" packet? */
6247 p
+= xsnprintf (p
, endp
- p
, "vCont");
6249 if (ptid
== magic_null_ptid
)
6251 /* MAGIC_NULL_PTID means that we don't have any active threads,
6252 so we don't have any TID numbers the inferior will
6253 understand. Make sure to only send forms that do not specify
6255 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6257 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6259 /* Resume all threads (of all processes, or of a single
6260 process), with preference for INFERIOR_PTID. This assumes
6261 inferior_ptid belongs to the set of all threads we are about
6263 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6265 /* Step inferior_ptid, with or without signal. */
6266 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6269 /* Also pass down any pending signaled resumption for other
6270 threads not the current. */
6271 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6273 /* And continue others without a signal. */
6274 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6278 /* Scheduler locking; resume only PTID. */
6279 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6282 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6285 if (target_is_non_stop_p ())
6287 /* In non-stop, the stub replies to vCont with "OK". The stop
6288 reply will be reported asynchronously by means of a `%Stop'
6290 getpkt (&rs
->buf
, 0);
6291 if (strcmp (rs
->buf
.data (), "OK") != 0)
6292 error (_("Unexpected vCont reply in non-stop mode: %s"),
6299 /* Tell the remote machine to resume. */
6302 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6304 struct remote_state
*rs
= get_remote_state ();
6306 /* When connected in non-stop mode, the core resumes threads
6307 individually. Resuming remote threads directly in target_resume
6308 would thus result in sending one packet per thread. Instead, to
6309 minimize roundtrip latency, here we just store the resume
6310 request; the actual remote resumption will be done in
6311 target_commit_resume / remote_commit_resume, where we'll be able
6312 to do vCont action coalescing. */
6313 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6315 remote_thread_info
*remote_thr
;
6317 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6318 remote_thr
= get_remote_thread_info (this, inferior_ptid
);
6320 remote_thr
= get_remote_thread_info (this, ptid
);
6322 remote_thr
->last_resume_step
= step
;
6323 remote_thr
->last_resume_sig
= siggnal
;
6327 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6328 (explained in remote-notif.c:handle_notification) so
6329 remote_notif_process is not called. We need find a place where
6330 it is safe to start a 'vNotif' sequence. It is good to do it
6331 before resuming inferior, because inferior was stopped and no RSP
6332 traffic at that moment. */
6333 if (!target_is_non_stop_p ())
6334 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6336 rs
->last_resume_exec_dir
= ::execution_direction
;
6338 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6339 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6340 remote_resume_with_hc (ptid
, step
, siggnal
);
6342 /* We are about to start executing the inferior, let's register it
6343 with the event loop. NOTE: this is the one place where all the
6344 execution commands end up. We could alternatively do this in each
6345 of the execution commands in infcmd.c. */
6346 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6347 into infcmd.c in order to allow inferior function calls to work
6348 NOT asynchronously. */
6349 if (target_can_async_p ())
6352 /* We've just told the target to resume. The remote server will
6353 wait for the inferior to stop, and then send a stop reply. In
6354 the mean time, we can't start another command/query ourselves
6355 because the stub wouldn't be ready to process it. This applies
6356 only to the base all-stop protocol, however. In non-stop (which
6357 only supports vCont), the stub replies with an "OK", and is
6358 immediate able to process further serial input. */
6359 if (!target_is_non_stop_p ())
6360 rs
->waiting_for_stop_reply
= 1;
6363 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6365 /* Private per-inferior info for target remote processes. */
6367 struct remote_inferior
: public private_inferior
6369 /* Whether we can send a wildcard vCont for this process. */
6370 bool may_wildcard_vcont
= true;
6373 /* Get the remote private inferior data associated to INF. */
6375 static remote_inferior
*
6376 get_remote_inferior (inferior
*inf
)
6378 if (inf
->priv
== NULL
)
6379 inf
->priv
.reset (new remote_inferior
);
6381 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6384 /* Class used to track the construction of a vCont packet in the
6385 outgoing packet buffer. This is used to send multiple vCont
6386 packets if we have more actions than would fit a single packet. */
6391 explicit vcont_builder (remote_target
*remote
)
6398 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6403 /* The remote target. */
6404 remote_target
*m_remote
;
6406 /* Pointer to the first action. P points here if no action has been
6408 char *m_first_action
;
6410 /* Where the next action will be appended. */
6413 /* The end of the buffer. Must never write past this. */
6417 /* Prepare the outgoing buffer for a new vCont packet. */
6420 vcont_builder::restart ()
6422 struct remote_state
*rs
= m_remote
->get_remote_state ();
6424 m_p
= rs
->buf
.data ();
6425 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6426 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6427 m_first_action
= m_p
;
6430 /* If the vCont packet being built has any action, send it to the
6434 vcont_builder::flush ()
6436 struct remote_state
*rs
;
6438 if (m_p
== m_first_action
)
6441 rs
= m_remote
->get_remote_state ();
6442 m_remote
->putpkt (rs
->buf
);
6443 m_remote
->getpkt (&rs
->buf
, 0);
6444 if (strcmp (rs
->buf
.data (), "OK") != 0)
6445 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6448 /* The largest action is range-stepping, with its two addresses. This
6449 is more than sufficient. If a new, bigger action is created, it'll
6450 quickly trigger a failed assertion in append_resumption (and we'll
6452 #define MAX_ACTION_SIZE 200
6454 /* Append a new vCont action in the outgoing packet being built. If
6455 the action doesn't fit the packet along with previous actions, push
6456 what we've got so far to the remote end and start over a new vCont
6457 packet (with the new action). */
6460 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6462 char buf
[MAX_ACTION_SIZE
+ 1];
6464 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6465 ptid
, step
, siggnal
);
6467 /* Check whether this new action would fit in the vCont packet along
6468 with previous actions. If not, send what we've got so far and
6469 start a new vCont packet. */
6470 size_t rsize
= endp
- buf
;
6471 if (rsize
> m_endp
- m_p
)
6476 /* Should now fit. */
6477 gdb_assert (rsize
<= m_endp
- m_p
);
6480 memcpy (m_p
, buf
, rsize
);
6485 /* to_commit_resume implementation. */
6488 remote_target::commit_resume ()
6490 int any_process_wildcard
;
6491 int may_global_wildcard_vcont
;
6493 /* If connected in all-stop mode, we'd send the remote resume
6494 request directly from remote_resume. Likewise if
6495 reverse-debugging, as there are no defined vCont actions for
6496 reverse execution. */
6497 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6500 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6501 instead of resuming all threads of each process individually.
6502 However, if any thread of a process must remain halted, we can't
6503 send wildcard resumes and must send one action per thread.
6505 Care must be taken to not resume threads/processes the server
6506 side already told us are stopped, but the core doesn't know about
6507 yet, because the events are still in the vStopped notification
6510 #1 => vCont s:p1.1;c
6512 #3 <= %Stopped T05 p1.1
6517 #8 (infrun handles the stop for p1.1 and continues stepping)
6518 #9 => vCont s:p1.1;c
6520 The last vCont above would resume thread p1.2 by mistake, because
6521 the server has no idea that the event for p1.2 had not been
6524 The server side must similarly ignore resume actions for the
6525 thread that has a pending %Stopped notification (and any other
6526 threads with events pending), until GDB acks the notification
6527 with vStopped. Otherwise, e.g., the following case is
6530 #1 => g (or any other packet)
6532 #3 <= %Stopped T05 p1.2
6533 #4 => vCont s:p1.1;c
6536 Above, the server must not resume thread p1.2. GDB can't know
6537 that p1.2 stopped until it acks the %Stopped notification, and
6538 since from GDB's perspective all threads should be running, it
6541 Finally, special care must also be given to handling fork/vfork
6542 events. A (v)fork event actually tells us that two processes
6543 stopped -- the parent and the child. Until we follow the fork,
6544 we must not resume the child. Therefore, if we have a pending
6545 fork follow, we must not send a global wildcard resume action
6546 (vCont;c). We can still send process-wide wildcards though. */
6548 /* Start by assuming a global wildcard (vCont;c) is possible. */
6549 may_global_wildcard_vcont
= 1;
6551 /* And assume every process is individually wildcard-able too. */
6552 for (inferior
*inf
: all_non_exited_inferiors (this))
6554 remote_inferior
*priv
= get_remote_inferior (inf
);
6556 priv
->may_wildcard_vcont
= true;
6559 /* Check for any pending events (not reported or processed yet) and
6560 disable process and global wildcard resumes appropriately. */
6561 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6563 for (thread_info
*tp
: all_non_exited_threads (this))
6565 /* If a thread of a process is not meant to be resumed, then we
6566 can't wildcard that process. */
6569 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6571 /* And if we can't wildcard a process, we can't wildcard
6572 everything either. */
6573 may_global_wildcard_vcont
= 0;
6577 /* If a thread is the parent of an unfollowed fork, then we
6578 can't do a global wildcard, as that would resume the fork
6580 if (is_pending_fork_parent_thread (tp
))
6581 may_global_wildcard_vcont
= 0;
6584 /* Now let's build the vCont packet(s). Actions must be appended
6585 from narrower to wider scopes (thread -> process -> global). If
6586 we end up with too many actions for a single packet vcont_builder
6587 flushes the current vCont packet to the remote side and starts a
6589 struct vcont_builder
vcont_builder (this);
6591 /* Threads first. */
6592 for (thread_info
*tp
: all_non_exited_threads (this))
6594 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6596 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
6599 gdb_assert (!thread_is_in_step_over_chain (tp
));
6601 if (!remote_thr
->last_resume_step
6602 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
6603 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6605 /* We'll send a wildcard resume instead. */
6606 remote_thr
->vcont_resumed
= 1;
6610 vcont_builder
.push_action (tp
->ptid
,
6611 remote_thr
->last_resume_step
,
6612 remote_thr
->last_resume_sig
);
6613 remote_thr
->vcont_resumed
= 1;
6616 /* Now check whether we can send any process-wide wildcard. This is
6617 to avoid sending a global wildcard in the case nothing is
6618 supposed to be resumed. */
6619 any_process_wildcard
= 0;
6621 for (inferior
*inf
: all_non_exited_inferiors (this))
6623 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6625 any_process_wildcard
= 1;
6630 if (any_process_wildcard
)
6632 /* If all processes are wildcard-able, then send a single "c"
6633 action, otherwise, send an "all (-1) threads of process"
6634 continue action for each running process, if any. */
6635 if (may_global_wildcard_vcont
)
6637 vcont_builder
.push_action (minus_one_ptid
,
6638 false, GDB_SIGNAL_0
);
6642 for (inferior
*inf
: all_non_exited_inferiors (this))
6644 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6646 vcont_builder
.push_action (ptid_t (inf
->pid
),
6647 false, GDB_SIGNAL_0
);
6653 vcont_builder
.flush ();
6658 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6659 thread, all threads of a remote process, or all threads of all
6663 remote_target::remote_stop_ns (ptid_t ptid
)
6665 struct remote_state
*rs
= get_remote_state ();
6666 char *p
= rs
->buf
.data ();
6667 char *endp
= p
+ get_remote_packet_size ();
6669 /* FIXME: This supports_vCont_probed check is a workaround until
6670 packet_support is per-connection. */
6671 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6672 || !rs
->supports_vCont_probed
)
6673 remote_vcont_probe ();
6675 if (!rs
->supports_vCont
.t
)
6676 error (_("Remote server does not support stopping threads"));
6678 if (ptid
== minus_one_ptid
6679 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6680 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6685 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6688 /* All (-1) threads of process. */
6689 nptid
= ptid_t (ptid
.pid (), -1, 0);
6692 /* Small optimization: if we already have a stop reply for
6693 this thread, no use in telling the stub we want this
6695 if (peek_stop_reply (ptid
))
6701 write_ptid (p
, endp
, nptid
);
6704 /* In non-stop, we get an immediate OK reply. The stop reply will
6705 come in asynchronously by notification. */
6707 getpkt (&rs
->buf
, 0);
6708 if (strcmp (rs
->buf
.data (), "OK") != 0)
6709 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6713 /* All-stop version of target_interrupt. Sends a break or a ^C to
6714 interrupt the remote target. It is undefined which thread of which
6715 process reports the interrupt. */
6718 remote_target::remote_interrupt_as ()
6720 struct remote_state
*rs
= get_remote_state ();
6722 rs
->ctrlc_pending_p
= 1;
6724 /* If the inferior is stopped already, but the core didn't know
6725 about it yet, just ignore the request. The cached wait status
6726 will be collected in remote_wait. */
6727 if (rs
->cached_wait_status
)
6730 /* Send interrupt_sequence to remote target. */
6731 send_interrupt_sequence ();
6734 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6735 the remote target. It is undefined which thread of which process
6736 reports the interrupt. Throws an error if the packet is not
6737 supported by the server. */
6740 remote_target::remote_interrupt_ns ()
6742 struct remote_state
*rs
= get_remote_state ();
6743 char *p
= rs
->buf
.data ();
6744 char *endp
= p
+ get_remote_packet_size ();
6746 xsnprintf (p
, endp
- p
, "vCtrlC");
6748 /* In non-stop, we get an immediate OK reply. The stop reply will
6749 come in asynchronously by notification. */
6751 getpkt (&rs
->buf
, 0);
6753 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6757 case PACKET_UNKNOWN
:
6758 error (_("No support for interrupting the remote target."));
6760 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
6764 /* Implement the to_stop function for the remote targets. */
6767 remote_target::stop (ptid_t ptid
)
6770 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6772 if (target_is_non_stop_p ())
6773 remote_stop_ns (ptid
);
6776 /* We don't currently have a way to transparently pause the
6777 remote target in all-stop mode. Interrupt it instead. */
6778 remote_interrupt_as ();
6782 /* Implement the to_interrupt function for the remote targets. */
6785 remote_target::interrupt ()
6788 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6790 if (target_is_non_stop_p ())
6791 remote_interrupt_ns ();
6793 remote_interrupt_as ();
6796 /* Implement the to_pass_ctrlc function for the remote targets. */
6799 remote_target::pass_ctrlc ()
6801 struct remote_state
*rs
= get_remote_state ();
6804 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6806 /* If we're starting up, we're not fully synced yet. Quit
6808 if (rs
->starting_up
)
6810 /* If ^C has already been sent once, offer to disconnect. */
6811 else if (rs
->ctrlc_pending_p
)
6814 target_interrupt ();
6817 /* Ask the user what to do when an interrupt is received. */
6820 remote_target::interrupt_query ()
6822 struct remote_state
*rs
= get_remote_state ();
6824 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6826 if (query (_("The target is not responding to interrupt requests.\n"
6827 "Stop debugging it? ")))
6829 remote_unpush_target (this);
6830 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6835 if (query (_("Interrupted while waiting for the program.\n"
6836 "Give up waiting? ")))
6841 /* Enable/disable target terminal ownership. Most targets can use
6842 terminal groups to control terminal ownership. Remote targets are
6843 different in that explicit transfer of ownership to/from GDB/target
6847 remote_target::terminal_inferior ()
6849 /* NOTE: At this point we could also register our selves as the
6850 recipient of all input. Any characters typed could then be
6851 passed on down to the target. */
6855 remote_target::terminal_ours ()
6860 remote_console_output (const char *msg
)
6864 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6867 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6871 gdb_stdtarg
->puts (tb
);
6873 gdb_stdtarg
->flush ();
6876 struct stop_reply
: public notif_event
6880 /* The identifier of the thread about this event */
6883 /* The remote state this event is associated with. When the remote
6884 connection, represented by a remote_state object, is closed,
6885 all the associated stop_reply events should be released. */
6886 struct remote_state
*rs
;
6888 struct target_waitstatus ws
;
6890 /* The architecture associated with the expedited registers. */
6893 /* Expedited registers. This makes remote debugging a bit more
6894 efficient for those targets that provide critical registers as
6895 part of their normal status mechanism (as another roundtrip to
6896 fetch them is avoided). */
6897 std::vector
<cached_reg_t
> regcache
;
6899 enum target_stop_reason stop_reason
;
6901 CORE_ADDR watch_data_address
;
6906 /* Return the length of the stop reply queue. */
6909 remote_target::stop_reply_queue_length ()
6911 remote_state
*rs
= get_remote_state ();
6912 return rs
->stop_reply_queue
.size ();
6916 remote_notif_stop_parse (remote_target
*remote
,
6917 struct notif_client
*self
, const char *buf
,
6918 struct notif_event
*event
)
6920 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6924 remote_notif_stop_ack (remote_target
*remote
,
6925 struct notif_client
*self
, const char *buf
,
6926 struct notif_event
*event
)
6928 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6931 putpkt (remote
, self
->ack_command
);
6933 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6935 /* We got an unknown stop reply. */
6936 error (_("Unknown stop reply"));
6939 remote
->push_stop_reply (stop_reply
);
6943 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
6944 struct notif_client
*self
)
6946 /* We can't get pending events in remote_notif_process for
6947 notification stop, and we have to do this in remote_wait_ns
6948 instead. If we fetch all queued events from stub, remote stub
6949 may exit and we have no chance to process them back in
6951 remote_state
*rs
= remote
->get_remote_state ();
6952 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
6956 stop_reply::~stop_reply ()
6958 for (cached_reg_t
®
: regcache
)
6962 static notif_event_up
6963 remote_notif_stop_alloc_reply ()
6965 return notif_event_up (new struct stop_reply ());
6968 /* A client of notification Stop. */
6970 struct notif_client notif_client_stop
=
6974 remote_notif_stop_parse
,
6975 remote_notif_stop_ack
,
6976 remote_notif_stop_can_get_pending_events
,
6977 remote_notif_stop_alloc_reply
,
6981 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6982 the pid of the process that owns the threads we want to check, or
6983 -1 if we want to check all threads. */
6986 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6989 if (ws
->kind
== TARGET_WAITKIND_FORKED
6990 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6992 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
6999 /* Return the thread's pending status used to determine whether the
7000 thread is a fork parent stopped at a fork event. */
7002 static struct target_waitstatus
*
7003 thread_pending_fork_status (struct thread_info
*thread
)
7005 if (thread
->suspend
.waitstatus_pending_p
)
7006 return &thread
->suspend
.waitstatus
;
7008 return &thread
->pending_follow
;
7011 /* Determine if THREAD is a pending fork parent thread. */
7014 is_pending_fork_parent_thread (struct thread_info
*thread
)
7016 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7019 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7022 /* If CONTEXT contains any fork child threads that have not been
7023 reported yet, remove them from the CONTEXT list. If such a
7024 thread exists it is because we are stopped at a fork catchpoint
7025 and have not yet called follow_fork, which will set up the
7026 host-side data structures for the new process. */
7029 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7032 struct notif_client
*notif
= ¬if_client_stop
;
7034 /* For any threads stopped at a fork event, remove the corresponding
7035 fork child threads from the CONTEXT list. */
7036 for (thread_info
*thread
: all_non_exited_threads (this))
7038 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7040 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7041 context
->remove_thread (ws
->value
.related_pid
);
7044 /* Check for any pending fork events (not reported or processed yet)
7045 in process PID and remove those fork child threads from the
7046 CONTEXT list as well. */
7047 remote_notif_get_pending_events (notif
);
7048 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7049 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7050 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7051 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7052 context
->remove_thread (event
->ws
.value
.related_pid
);
7055 /* Check whether any event pending in the vStopped queue would prevent
7056 a global or process wildcard vCont action. Clear
7057 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7058 and clear the event inferior's may_wildcard_vcont flag if we can't
7059 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7062 remote_target::check_pending_events_prevent_wildcard_vcont
7063 (int *may_global_wildcard
)
7065 struct notif_client
*notif
= ¬if_client_stop
;
7067 remote_notif_get_pending_events (notif
);
7068 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7070 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7071 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7074 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7075 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7076 *may_global_wildcard
= 0;
7078 struct inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7080 /* This may be the first time we heard about this process.
7081 Regardless, we must not do a global wildcard resume, otherwise
7082 we'd resume this process too. */
7083 *may_global_wildcard
= 0;
7085 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7089 /* Discard all pending stop replies of inferior INF. */
7092 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7094 struct stop_reply
*reply
;
7095 struct remote_state
*rs
= get_remote_state ();
7096 struct remote_notif_state
*rns
= rs
->notif_state
;
7098 /* This function can be notified when an inferior exists. When the
7099 target is not remote, the notification state is NULL. */
7100 if (rs
->remote_desc
== NULL
)
7103 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7105 /* Discard the in-flight notification. */
7106 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7109 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
7112 /* Discard the stop replies we have already pulled with
7114 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7115 rs
->stop_reply_queue
.end (),
7116 [=] (const stop_reply_up
&event
)
7118 return event
->ptid
.pid () == inf
->pid
;
7120 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7123 /* Discard the stop replies for RS in stop_reply_queue. */
7126 remote_target::discard_pending_stop_replies_in_queue ()
7128 remote_state
*rs
= get_remote_state ();
7130 /* Discard the stop replies we have already pulled with
7132 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7133 rs
->stop_reply_queue
.end (),
7134 [=] (const stop_reply_up
&event
)
7136 return event
->rs
== rs
;
7138 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7141 /* Remove the first reply in 'stop_reply_queue' which matches
7145 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7147 remote_state
*rs
= get_remote_state ();
7149 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7150 rs
->stop_reply_queue
.end (),
7151 [=] (const stop_reply_up
&event
)
7153 return event
->ptid
.matches (ptid
);
7155 struct stop_reply
*result
;
7156 if (iter
== rs
->stop_reply_queue
.end ())
7160 result
= iter
->release ();
7161 rs
->stop_reply_queue
.erase (iter
);
7165 fprintf_unfiltered (gdb_stdlog
,
7166 "notif: discard queued event: 'Stop' in %s\n",
7167 target_pid_to_str (ptid
).c_str ());
7172 /* Look for a queued stop reply belonging to PTID. If one is found,
7173 remove it from the queue, and return it. Returns NULL if none is
7174 found. If there are still queued events left to process, tell the
7175 event loop to get back to target_wait soon. */
7178 remote_target::queued_stop_reply (ptid_t ptid
)
7180 remote_state
*rs
= get_remote_state ();
7181 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7183 if (!rs
->stop_reply_queue
.empty ())
7185 /* There's still at least an event left. */
7186 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7192 /* Push a fully parsed stop reply in the stop reply queue. Since we
7193 know that we now have at least one queued event left to pass to the
7194 core side, tell the event loop to get back to target_wait soon. */
7197 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7199 remote_state
*rs
= get_remote_state ();
7200 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7203 fprintf_unfiltered (gdb_stdlog
,
7204 "notif: push 'Stop' %s to queue %d\n",
7205 target_pid_to_str (new_event
->ptid
).c_str (),
7206 int (rs
->stop_reply_queue
.size ()));
7208 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7211 /* Returns true if we have a stop reply for PTID. */
7214 remote_target::peek_stop_reply (ptid_t ptid
)
7216 remote_state
*rs
= get_remote_state ();
7217 for (auto &event
: rs
->stop_reply_queue
)
7218 if (ptid
== event
->ptid
7219 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7224 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7225 starting with P and ending with PEND matches PREFIX. */
7228 strprefix (const char *p
, const char *pend
, const char *prefix
)
7230 for ( ; p
< pend
; p
++, prefix
++)
7233 return *prefix
== '\0';
7236 /* Parse the stop reply in BUF. Either the function succeeds, and the
7237 result is stored in EVENT, or throws an error. */
7240 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7242 remote_arch_state
*rsa
= NULL
;
7247 event
->ptid
= null_ptid
;
7248 event
->rs
= get_remote_state ();
7249 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7250 event
->ws
.value
.integer
= 0;
7251 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7252 event
->regcache
.clear ();
7257 case 'T': /* Status with PC, SP, FP, ... */
7258 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7259 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7261 n... = register number
7262 r... = register contents
7265 p
= &buf
[3]; /* after Txx */
7271 p1
= strchr (p
, ':');
7273 error (_("Malformed packet(a) (missing colon): %s\n\
7277 error (_("Malformed packet(a) (missing register number): %s\n\
7281 /* Some "registers" are actually extended stop information.
7282 Note if you're adding a new entry here: GDB 7.9 and
7283 earlier assume that all register "numbers" that start
7284 with an hex digit are real register numbers. Make sure
7285 the server only sends such a packet if it knows the
7286 client understands it. */
7288 if (strprefix (p
, p1
, "thread"))
7289 event
->ptid
= read_ptid (++p1
, &p
);
7290 else if (strprefix (p
, p1
, "syscall_entry"))
7294 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7295 p
= unpack_varlen_hex (++p1
, &sysno
);
7296 event
->ws
.value
.syscall_number
= (int) sysno
;
7298 else if (strprefix (p
, p1
, "syscall_return"))
7302 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7303 p
= unpack_varlen_hex (++p1
, &sysno
);
7304 event
->ws
.value
.syscall_number
= (int) sysno
;
7306 else if (strprefix (p
, p1
, "watch")
7307 || strprefix (p
, p1
, "rwatch")
7308 || strprefix (p
, p1
, "awatch"))
7310 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7311 p
= unpack_varlen_hex (++p1
, &addr
);
7312 event
->watch_data_address
= (CORE_ADDR
) addr
;
7314 else if (strprefix (p
, p1
, "swbreak"))
7316 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7318 /* Make sure the stub doesn't forget to indicate support
7320 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7321 error (_("Unexpected swbreak stop reason"));
7323 /* The value part is documented as "must be empty",
7324 though we ignore it, in case we ever decide to make
7325 use of it in a backward compatible way. */
7326 p
= strchrnul (p1
+ 1, ';');
7328 else if (strprefix (p
, p1
, "hwbreak"))
7330 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7332 /* Make sure the stub doesn't forget to indicate support
7334 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7335 error (_("Unexpected hwbreak stop reason"));
7338 p
= strchrnul (p1
+ 1, ';');
7340 else if (strprefix (p
, p1
, "library"))
7342 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7343 p
= strchrnul (p1
+ 1, ';');
7345 else if (strprefix (p
, p1
, "replaylog"))
7347 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7348 /* p1 will indicate "begin" or "end", but it makes
7349 no difference for now, so ignore it. */
7350 p
= strchrnul (p1
+ 1, ';');
7352 else if (strprefix (p
, p1
, "core"))
7356 p
= unpack_varlen_hex (++p1
, &c
);
7359 else if (strprefix (p
, p1
, "fork"))
7361 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7362 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7364 else if (strprefix (p
, p1
, "vfork"))
7366 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7367 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7369 else if (strprefix (p
, p1
, "vforkdone"))
7371 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7372 p
= strchrnul (p1
+ 1, ';');
7374 else if (strprefix (p
, p1
, "exec"))
7379 /* Determine the length of the execd pathname. */
7380 p
= unpack_varlen_hex (++p1
, &ignored
);
7381 pathlen
= (p
- p1
) / 2;
7383 /* Save the pathname for event reporting and for
7384 the next run command. */
7385 gdb::unique_xmalloc_ptr
<char[]> pathname
7386 ((char *) xmalloc (pathlen
+ 1));
7387 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7388 pathname
[pathlen
] = '\0';
7390 /* This is freed during event handling. */
7391 event
->ws
.value
.execd_pathname
= pathname
.release ();
7392 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7394 /* Skip the registers included in this packet, since
7395 they may be for an architecture different from the
7396 one used by the original program. */
7399 else if (strprefix (p
, p1
, "create"))
7401 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7402 p
= strchrnul (p1
+ 1, ';');
7411 p
= strchrnul (p1
+ 1, ';');
7416 /* Maybe a real ``P'' register number. */
7417 p_temp
= unpack_varlen_hex (p
, &pnum
);
7418 /* If the first invalid character is the colon, we got a
7419 register number. Otherwise, it's an unknown stop
7423 /* If we haven't parsed the event's thread yet, find
7424 it now, in order to find the architecture of the
7425 reported expedited registers. */
7426 if (event
->ptid
== null_ptid
)
7428 /* If there is no thread-id information then leave
7429 the event->ptid as null_ptid. Later in
7430 process_stop_reply we will pick a suitable
7432 const char *thr
= strstr (p1
+ 1, ";thread:");
7434 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7441 = (event
->ptid
== null_ptid
7443 : find_inferior_ptid (this, event
->ptid
));
7444 /* If this is the first time we learn anything
7445 about this process, skip the registers
7446 included in this packet, since we don't yet
7447 know which architecture to use to parse them.
7448 We'll determine the architecture later when
7449 we process the stop reply and retrieve the
7450 target description, via
7451 remote_notice_new_inferior ->
7452 post_create_inferior. */
7455 p
= strchrnul (p1
+ 1, ';');
7460 event
->arch
= inf
->gdbarch
;
7461 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7465 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7466 cached_reg_t cached_reg
;
7469 error (_("Remote sent bad register number %s: %s\n\
7471 hex_string (pnum
), p
, buf
);
7473 cached_reg
.num
= reg
->regnum
;
7474 cached_reg
.data
= (gdb_byte
*)
7475 xmalloc (register_size (event
->arch
, reg
->regnum
));
7478 fieldsize
= hex2bin (p
, cached_reg
.data
,
7479 register_size (event
->arch
, reg
->regnum
));
7481 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7482 warning (_("Remote reply is too short: %s"), buf
);
7484 event
->regcache
.push_back (cached_reg
);
7488 /* Not a number. Silently skip unknown optional
7490 p
= strchrnul (p1
+ 1, ';');
7495 error (_("Remote register badly formatted: %s\nhere: %s"),
7500 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7504 case 'S': /* Old style status, just signal only. */
7508 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7509 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7510 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7511 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7513 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7516 case 'w': /* Thread exited. */
7520 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7521 p
= unpack_varlen_hex (&buf
[1], &value
);
7522 event
->ws
.value
.integer
= value
;
7524 error (_("stop reply packet badly formatted: %s"), buf
);
7525 event
->ptid
= read_ptid (++p
, NULL
);
7528 case 'W': /* Target exited. */
7533 /* GDB used to accept only 2 hex chars here. Stubs should
7534 only send more if they detect GDB supports multi-process
7536 p
= unpack_varlen_hex (&buf
[1], &value
);
7540 /* The remote process exited. */
7541 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7542 event
->ws
.value
.integer
= value
;
7546 /* The remote process exited with a signal. */
7547 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7548 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7549 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7551 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7554 /* If no process is specified, return null_ptid, and let the
7555 caller figure out the right process to use. */
7565 else if (startswith (p
, "process:"))
7569 p
+= sizeof ("process:") - 1;
7570 unpack_varlen_hex (p
, &upid
);
7574 error (_("unknown stop reply packet: %s"), buf
);
7577 error (_("unknown stop reply packet: %s"), buf
);
7578 event
->ptid
= ptid_t (pid
);
7582 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7583 event
->ptid
= minus_one_ptid
;
7588 /* When the stub wants to tell GDB about a new notification reply, it
7589 sends a notification (%Stop, for example). Those can come it at
7590 any time, hence, we have to make sure that any pending
7591 putpkt/getpkt sequence we're making is finished, before querying
7592 the stub for more events with the corresponding ack command
7593 (vStopped, for example). E.g., if we started a vStopped sequence
7594 immediately upon receiving the notification, something like this
7602 1.6) <-- (registers reply to step #1.3)
7604 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7607 To solve this, whenever we parse a %Stop notification successfully,
7608 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7609 doing whatever we were doing:
7615 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7616 2.5) <-- (registers reply to step #2.3)
7618 Eventually after step #2.5, we return to the event loop, which
7619 notices there's an event on the
7620 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7621 associated callback --- the function below. At this point, we're
7622 always safe to start a vStopped sequence. :
7625 2.7) <-- T05 thread:2
7631 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7633 struct remote_state
*rs
= get_remote_state ();
7635 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7638 fprintf_unfiltered (gdb_stdlog
,
7639 "notif: process: '%s' ack pending event\n",
7643 nc
->ack (this, nc
, rs
->buf
.data (),
7644 rs
->notif_state
->pending_event
[nc
->id
]);
7645 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7649 getpkt (&rs
->buf
, 0);
7650 if (strcmp (rs
->buf
.data (), "OK") == 0)
7653 remote_notif_ack (this, nc
, rs
->buf
.data ());
7659 fprintf_unfiltered (gdb_stdlog
,
7660 "notif: process: '%s' no pending reply\n",
7665 /* Wrapper around remote_target::remote_notif_get_pending_events to
7666 avoid having to export the whole remote_target class. */
7669 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7671 remote
->remote_notif_get_pending_events (nc
);
7674 /* Called when it is decided that STOP_REPLY holds the info of the
7675 event that is to be returned to the core. This function always
7676 destroys STOP_REPLY. */
7679 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
7680 struct target_waitstatus
*status
)
7684 *status
= stop_reply
->ws
;
7685 ptid
= stop_reply
->ptid
;
7687 /* If no thread/process was reported by the stub then use the first
7688 non-exited thread in the current target. */
7689 if (ptid
== null_ptid
)
7691 /* Some stop events apply to all threads in an inferior, while others
7692 only apply to a single thread. */
7693 bool is_stop_for_all_threads
7694 = (status
->kind
== TARGET_WAITKIND_EXITED
7695 || status
->kind
== TARGET_WAITKIND_SIGNALLED
);
7697 for (thread_info
*thr
: all_non_exited_threads (this))
7699 if (ptid
!= null_ptid
7700 && (!is_stop_for_all_threads
7701 || ptid
.pid () != thr
->ptid
.pid ()))
7703 static bool warned
= false;
7707 /* If you are seeing this warning then the remote target
7708 has stopped without specifying a thread-id, but the
7709 target does have multiple threads (or inferiors), and
7710 so GDB is having to guess which thread stopped.
7712 Examples of what might cause this are the target
7713 sending and 'S' stop packet, or a 'T' stop packet and
7714 not including a thread-id.
7716 Additionally, the target might send a 'W' or 'X
7717 packet without including a process-id, when the target
7718 has multiple running inferiors. */
7719 if (is_stop_for_all_threads
)
7720 warning (_("multi-inferior target stopped without "
7721 "sending a process-id, using first "
7722 "non-exited inferior"));
7724 warning (_("multi-threaded target stopped without "
7725 "sending a thread-id, using first "
7726 "non-exited thread"));
7732 /* If this is a stop for all threads then don't use a particular
7733 threads ptid, instead create a new ptid where only the pid
7735 if (is_stop_for_all_threads
)
7736 ptid
= ptid_t (thr
->ptid
.pid ());
7740 gdb_assert (ptid
!= null_ptid
);
7743 if (status
->kind
!= TARGET_WAITKIND_EXITED
7744 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7745 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7747 /* Expedited registers. */
7748 if (!stop_reply
->regcache
.empty ())
7750 struct regcache
*regcache
7751 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
7753 for (cached_reg_t
®
: stop_reply
->regcache
)
7755 regcache
->raw_supply (reg
.num
, reg
.data
);
7759 stop_reply
->regcache
.clear ();
7762 remote_notice_new_inferior (ptid
, 0);
7763 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
7764 remote_thr
->core
= stop_reply
->core
;
7765 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7766 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7767 remote_thr
->vcont_resumed
= 0;
7774 /* The non-stop mode version of target_wait. */
7777 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
7778 target_wait_flags options
)
7780 struct remote_state
*rs
= get_remote_state ();
7781 struct stop_reply
*stop_reply
;
7785 /* If in non-stop mode, get out of getpkt even if a
7786 notification is received. */
7788 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
7791 if (ret
!= -1 && !is_notif
)
7794 case 'E': /* Error of some sort. */
7795 /* We're out of sync with the target now. Did it continue
7796 or not? We can't tell which thread it was in non-stop,
7797 so just ignore this. */
7798 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
7800 case 'O': /* Console output. */
7801 remote_console_output (&rs
->buf
[1]);
7804 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
7808 /* Acknowledge a pending stop reply that may have arrived in the
7810 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7811 remote_notif_get_pending_events (¬if_client_stop
);
7813 /* If indeed we noticed a stop reply, we're done. */
7814 stop_reply
= queued_stop_reply (ptid
);
7815 if (stop_reply
!= NULL
)
7816 return process_stop_reply (stop_reply
, status
);
7818 /* Still no event. If we're just polling for an event, then
7819 return to the event loop. */
7820 if (options
& TARGET_WNOHANG
)
7822 status
->kind
= TARGET_WAITKIND_IGNORE
;
7823 return minus_one_ptid
;
7826 /* Otherwise do a blocking wait. */
7827 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
7831 /* Return the first resumed thread. */
7834 first_remote_resumed_thread (remote_target
*target
)
7836 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
7842 /* Wait until the remote machine stops, then return, storing status in
7843 STATUS just as `wait' would. */
7846 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
,
7847 target_wait_flags options
)
7849 struct remote_state
*rs
= get_remote_state ();
7850 ptid_t event_ptid
= null_ptid
;
7852 struct stop_reply
*stop_reply
;
7856 status
->kind
= TARGET_WAITKIND_IGNORE
;
7857 status
->value
.integer
= 0;
7859 stop_reply
= queued_stop_reply (ptid
);
7860 if (stop_reply
!= NULL
)
7861 return process_stop_reply (stop_reply
, status
);
7863 if (rs
->cached_wait_status
)
7864 /* Use the cached wait status, but only once. */
7865 rs
->cached_wait_status
= 0;
7870 int forever
= ((options
& TARGET_WNOHANG
) == 0
7871 && rs
->wait_forever_enabled_p
);
7873 if (!rs
->waiting_for_stop_reply
)
7875 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7876 return minus_one_ptid
;
7879 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7880 _never_ wait for ever -> test on target_is_async_p().
7881 However, before we do that we need to ensure that the caller
7882 knows how to take the target into/out of async mode. */
7883 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
7885 /* GDB gets a notification. Return to core as this event is
7887 if (ret
!= -1 && is_notif
)
7888 return minus_one_ptid
;
7890 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7891 return minus_one_ptid
;
7894 buf
= rs
->buf
.data ();
7896 /* Assume that the target has acknowledged Ctrl-C unless we receive
7897 an 'F' or 'O' packet. */
7898 if (buf
[0] != 'F' && buf
[0] != 'O')
7899 rs
->ctrlc_pending_p
= 0;
7903 case 'E': /* Error of some sort. */
7904 /* We're out of sync with the target now. Did it continue or
7905 not? Not is more likely, so report a stop. */
7906 rs
->waiting_for_stop_reply
= 0;
7908 warning (_("Remote failure reply: %s"), buf
);
7909 status
->kind
= TARGET_WAITKIND_STOPPED
;
7910 status
->value
.sig
= GDB_SIGNAL_0
;
7912 case 'F': /* File-I/O request. */
7913 /* GDB may access the inferior memory while handling the File-I/O
7914 request, but we don't want GDB accessing memory while waiting
7915 for a stop reply. See the comments in putpkt_binary. Set
7916 waiting_for_stop_reply to 0 temporarily. */
7917 rs
->waiting_for_stop_reply
= 0;
7918 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
7919 rs
->ctrlc_pending_p
= 0;
7920 /* GDB handled the File-I/O request, and the target is running
7921 again. Keep waiting for events. */
7922 rs
->waiting_for_stop_reply
= 1;
7924 case 'N': case 'T': case 'S': case 'X': case 'W':
7926 /* There is a stop reply to handle. */
7927 rs
->waiting_for_stop_reply
= 0;
7930 = (struct stop_reply
*) remote_notif_parse (this,
7934 event_ptid
= process_stop_reply (stop_reply
, status
);
7937 case 'O': /* Console output. */
7938 remote_console_output (buf
+ 1);
7941 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7943 /* Zero length reply means that we tried 'S' or 'C' and the
7944 remote system doesn't support it. */
7945 target_terminal::ours_for_output ();
7947 ("Can't send signals to this remote system. %s not sent.\n",
7948 gdb_signal_to_name (rs
->last_sent_signal
));
7949 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7950 target_terminal::inferior ();
7952 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7958 warning (_("Invalid remote reply: %s"), buf
);
7962 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7963 return minus_one_ptid
;
7964 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7966 /* Nothing interesting happened. If we're doing a non-blocking
7967 poll, we're done. Otherwise, go back to waiting. */
7968 if (options
& TARGET_WNOHANG
)
7969 return minus_one_ptid
;
7973 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7974 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7976 if (event_ptid
!= null_ptid
)
7977 record_currthread (rs
, event_ptid
);
7979 event_ptid
= first_remote_resumed_thread (this);
7983 /* A process exit. Invalidate our notion of current thread. */
7984 record_currthread (rs
, minus_one_ptid
);
7985 /* It's possible that the packet did not include a pid. */
7986 if (event_ptid
== null_ptid
)
7987 event_ptid
= first_remote_resumed_thread (this);
7988 /* EVENT_PTID could still be NULL_PTID. Double-check. */
7989 if (event_ptid
== null_ptid
)
7990 event_ptid
= magic_null_ptid
;
7996 /* Wait until the remote machine stops, then return, storing status in
7997 STATUS just as `wait' would. */
8000 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
,
8001 target_wait_flags options
)
8005 if (target_is_non_stop_p ())
8006 event_ptid
= wait_ns (ptid
, status
, options
);
8008 event_ptid
= wait_as (ptid
, status
, options
);
8010 if (target_is_async_p ())
8012 remote_state
*rs
= get_remote_state ();
8014 /* If there are are events left in the queue tell the event loop
8016 if (!rs
->stop_reply_queue
.empty ())
8017 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
8023 /* Fetch a single register using a 'p' packet. */
8026 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8029 struct gdbarch
*gdbarch
= regcache
->arch ();
8030 struct remote_state
*rs
= get_remote_state ();
8032 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8035 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8038 if (reg
->pnum
== -1)
8041 p
= rs
->buf
.data ();
8043 p
+= hexnumstr (p
, reg
->pnum
);
8046 getpkt (&rs
->buf
, 0);
8048 buf
= rs
->buf
.data ();
8050 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8054 case PACKET_UNKNOWN
:
8057 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8058 gdbarch_register_name (regcache
->arch (),
8063 /* If this register is unfetchable, tell the regcache. */
8066 regcache
->raw_supply (reg
->regnum
, NULL
);
8070 /* Otherwise, parse and supply the value. */
8076 error (_("fetch_register_using_p: early buf termination"));
8078 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8081 regcache
->raw_supply (reg
->regnum
, regp
);
8085 /* Fetch the registers included in the target's 'g' packet. */
8088 remote_target::send_g_packet ()
8090 struct remote_state
*rs
= get_remote_state ();
8093 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8095 getpkt (&rs
->buf
, 0);
8096 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8097 error (_("Could not read registers; remote failure reply '%s'"),
8100 /* We can get out of synch in various cases. If the first character
8101 in the buffer is not a hex character, assume that has happened
8102 and try to fetch another packet to read. */
8103 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8104 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8105 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8106 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8109 fprintf_unfiltered (gdb_stdlog
,
8110 "Bad register packet; fetching a new packet\n");
8111 getpkt (&rs
->buf
, 0);
8114 buf_len
= strlen (rs
->buf
.data ());
8116 /* Sanity check the received packet. */
8117 if (buf_len
% 2 != 0)
8118 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8124 remote_target::process_g_packet (struct regcache
*regcache
)
8126 struct gdbarch
*gdbarch
= regcache
->arch ();
8127 struct remote_state
*rs
= get_remote_state ();
8128 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8133 buf_len
= strlen (rs
->buf
.data ());
8135 /* Further sanity checks, with knowledge of the architecture. */
8136 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8137 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8139 rsa
->sizeof_g_packet
, buf_len
/ 2,
8142 /* Save the size of the packet sent to us by the target. It is used
8143 as a heuristic when determining the max size of packets that the
8144 target can safely receive. */
8145 if (rsa
->actual_register_packet_size
== 0)
8146 rsa
->actual_register_packet_size
= buf_len
;
8148 /* If this is smaller than we guessed the 'g' packet would be,
8149 update our records. A 'g' reply that doesn't include a register's
8150 value implies either that the register is not available, or that
8151 the 'p' packet must be used. */
8152 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8154 long sizeof_g_packet
= buf_len
/ 2;
8156 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8158 long offset
= rsa
->regs
[i
].offset
;
8159 long reg_size
= register_size (gdbarch
, i
);
8161 if (rsa
->regs
[i
].pnum
== -1)
8164 if (offset
>= sizeof_g_packet
)
8165 rsa
->regs
[i
].in_g_packet
= 0;
8166 else if (offset
+ reg_size
> sizeof_g_packet
)
8167 error (_("Truncated register %d in remote 'g' packet"), i
);
8169 rsa
->regs
[i
].in_g_packet
= 1;
8172 /* Looks valid enough, we can assume this is the correct length
8173 for a 'g' packet. It's important not to adjust
8174 rsa->sizeof_g_packet if we have truncated registers otherwise
8175 this "if" won't be run the next time the method is called
8176 with a packet of the same size and one of the internal errors
8177 below will trigger instead. */
8178 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8181 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8183 /* Unimplemented registers read as all bits zero. */
8184 memset (regs
, 0, rsa
->sizeof_g_packet
);
8186 /* Reply describes registers byte by byte, each byte encoded as two
8187 hex characters. Suck them all up, then supply them to the
8188 register cacheing/storage mechanism. */
8190 p
= rs
->buf
.data ();
8191 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8193 if (p
[0] == 0 || p
[1] == 0)
8194 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8195 internal_error (__FILE__
, __LINE__
,
8196 _("unexpected end of 'g' packet reply"));
8198 if (p
[0] == 'x' && p
[1] == 'x')
8199 regs
[i
] = 0; /* 'x' */
8201 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8205 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8207 struct packet_reg
*r
= &rsa
->regs
[i
];
8208 long reg_size
= register_size (gdbarch
, i
);
8212 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8213 /* This shouldn't happen - we adjusted in_g_packet above. */
8214 internal_error (__FILE__
, __LINE__
,
8215 _("unexpected end of 'g' packet reply"));
8216 else if (rs
->buf
[r
->offset
* 2] == 'x')
8218 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8219 /* The register isn't available, mark it as such (at
8220 the same time setting the value to zero). */
8221 regcache
->raw_supply (r
->regnum
, NULL
);
8224 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8230 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8233 process_g_packet (regcache
);
8236 /* Make the remote selected traceframe match GDB's selected
8240 remote_target::set_remote_traceframe ()
8243 struct remote_state
*rs
= get_remote_state ();
8245 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8248 /* Avoid recursion, remote_trace_find calls us again. */
8249 rs
->remote_traceframe_number
= get_traceframe_number ();
8251 newnum
= target_trace_find (tfind_number
,
8252 get_traceframe_number (), 0, 0, NULL
);
8254 /* Should not happen. If it does, all bets are off. */
8255 if (newnum
!= get_traceframe_number ())
8256 warning (_("could not set remote traceframe"));
8260 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8262 struct gdbarch
*gdbarch
= regcache
->arch ();
8263 struct remote_state
*rs
= get_remote_state ();
8264 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8267 set_remote_traceframe ();
8268 set_general_thread (regcache
->ptid ());
8272 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8274 gdb_assert (reg
!= NULL
);
8276 /* If this register might be in the 'g' packet, try that first -
8277 we are likely to read more than one register. If this is the
8278 first 'g' packet, we might be overly optimistic about its
8279 contents, so fall back to 'p'. */
8280 if (reg
->in_g_packet
)
8282 fetch_registers_using_g (regcache
);
8283 if (reg
->in_g_packet
)
8287 if (fetch_register_using_p (regcache
, reg
))
8290 /* This register is not available. */
8291 regcache
->raw_supply (reg
->regnum
, NULL
);
8296 fetch_registers_using_g (regcache
);
8298 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8299 if (!rsa
->regs
[i
].in_g_packet
)
8300 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8302 /* This register is not available. */
8303 regcache
->raw_supply (i
, NULL
);
8307 /* Prepare to store registers. Since we may send them all (using a
8308 'G' request), we have to read out the ones we don't want to change
8312 remote_target::prepare_to_store (struct regcache
*regcache
)
8314 struct remote_state
*rs
= get_remote_state ();
8315 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8318 /* Make sure the entire registers array is valid. */
8319 switch (packet_support (PACKET_P
))
8321 case PACKET_DISABLE
:
8322 case PACKET_SUPPORT_UNKNOWN
:
8323 /* Make sure all the necessary registers are cached. */
8324 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8325 if (rsa
->regs
[i
].in_g_packet
)
8326 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8333 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8334 packet was not recognized. */
8337 remote_target::store_register_using_P (const struct regcache
*regcache
,
8340 struct gdbarch
*gdbarch
= regcache
->arch ();
8341 struct remote_state
*rs
= get_remote_state ();
8342 /* Try storing a single register. */
8343 char *buf
= rs
->buf
.data ();
8344 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8347 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8350 if (reg
->pnum
== -1)
8353 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8354 p
= buf
+ strlen (buf
);
8355 regcache
->raw_collect (reg
->regnum
, regp
);
8356 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8358 getpkt (&rs
->buf
, 0);
8360 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8365 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8366 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8367 case PACKET_UNKNOWN
:
8370 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8374 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8375 contents of the register cache buffer. FIXME: ignores errors. */
8378 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8380 struct remote_state
*rs
= get_remote_state ();
8381 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8385 /* Extract all the registers in the regcache copying them into a
8390 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8391 memset (regs
, 0, rsa
->sizeof_g_packet
);
8392 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8394 struct packet_reg
*r
= &rsa
->regs
[i
];
8397 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8401 /* Command describes registers byte by byte,
8402 each byte encoded as two hex characters. */
8403 p
= rs
->buf
.data ();
8405 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8407 getpkt (&rs
->buf
, 0);
8408 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8409 error (_("Could not write registers; remote failure reply '%s'"),
8413 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8414 of the register cache buffer. FIXME: ignores errors. */
8417 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8419 struct gdbarch
*gdbarch
= regcache
->arch ();
8420 struct remote_state
*rs
= get_remote_state ();
8421 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8424 set_remote_traceframe ();
8425 set_general_thread (regcache
->ptid ());
8429 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8431 gdb_assert (reg
!= NULL
);
8433 /* Always prefer to store registers using the 'P' packet if
8434 possible; we often change only a small number of registers.
8435 Sometimes we change a larger number; we'd need help from a
8436 higher layer to know to use 'G'. */
8437 if (store_register_using_P (regcache
, reg
))
8440 /* For now, don't complain if we have no way to write the
8441 register. GDB loses track of unavailable registers too
8442 easily. Some day, this may be an error. We don't have
8443 any way to read the register, either... */
8444 if (!reg
->in_g_packet
)
8447 store_registers_using_G (regcache
);
8451 store_registers_using_G (regcache
);
8453 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8454 if (!rsa
->regs
[i
].in_g_packet
)
8455 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8456 /* See above for why we do not issue an error here. */
8461 /* Return the number of hex digits in num. */
8464 hexnumlen (ULONGEST num
)
8468 for (i
= 0; num
!= 0; i
++)
8471 return std::max (i
, 1);
8474 /* Set BUF to the minimum number of hex digits representing NUM. */
8477 hexnumstr (char *buf
, ULONGEST num
)
8479 int len
= hexnumlen (num
);
8481 return hexnumnstr (buf
, num
, len
);
8485 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8488 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8494 for (i
= width
- 1; i
>= 0; i
--)
8496 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8503 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8506 remote_address_masked (CORE_ADDR addr
)
8508 unsigned int address_size
= remote_address_size
;
8510 /* If "remoteaddresssize" was not set, default to target address size. */
8512 address_size
= gdbarch_addr_bit (target_gdbarch ());
8514 if (address_size
> 0
8515 && address_size
< (sizeof (ULONGEST
) * 8))
8517 /* Only create a mask when that mask can safely be constructed
8518 in a ULONGEST variable. */
8521 mask
= (mask
<< address_size
) - 1;
8527 /* Determine whether the remote target supports binary downloading.
8528 This is accomplished by sending a no-op memory write of zero length
8529 to the target at the specified address. It does not suffice to send
8530 the whole packet, since many stubs strip the eighth bit and
8531 subsequently compute a wrong checksum, which causes real havoc with
8534 NOTE: This can still lose if the serial line is not eight-bit
8535 clean. In cases like this, the user should clear "remote
8539 remote_target::check_binary_download (CORE_ADDR addr
)
8541 struct remote_state
*rs
= get_remote_state ();
8543 switch (packet_support (PACKET_X
))
8545 case PACKET_DISABLE
:
8549 case PACKET_SUPPORT_UNKNOWN
:
8553 p
= rs
->buf
.data ();
8555 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8557 p
+= hexnumstr (p
, (ULONGEST
) 0);
8561 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8562 getpkt (&rs
->buf
, 0);
8564 if (rs
->buf
[0] == '\0')
8567 fprintf_unfiltered (gdb_stdlog
,
8568 "binary downloading NOT "
8569 "supported by target\n");
8570 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8575 fprintf_unfiltered (gdb_stdlog
,
8576 "binary downloading supported by target\n");
8577 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8584 /* Helper function to resize the payload in order to try to get a good
8585 alignment. We try to write an amount of data such that the next write will
8586 start on an address aligned on REMOTE_ALIGN_WRITES. */
8589 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8591 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8594 /* Write memory data directly to the remote machine.
8595 This does not inform the data cache; the data cache uses this.
8596 HEADER is the starting part of the packet.
8597 MEMADDR is the address in the remote memory space.
8598 MYADDR is the address of the buffer in our space.
8599 LEN_UNITS is the number of addressable units to write.
8600 UNIT_SIZE is the length in bytes of an addressable unit.
8601 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8602 should send data as binary ('X'), or hex-encoded ('M').
8604 The function creates packet of the form
8605 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8607 where encoding of <DATA> is terminated by PACKET_FORMAT.
8609 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8612 Return the transferred status, error or OK (an
8613 'enum target_xfer_status' value). Save the number of addressable units
8614 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8616 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8617 exchange between gdb and the stub could look like (?? in place of the
8623 -> $M1000,3:eeeeffffeeee#??
8627 <- eeeeffffeeeedddd */
8630 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8631 const gdb_byte
*myaddr
,
8634 ULONGEST
*xfered_len_units
,
8635 char packet_format
, int use_length
)
8637 struct remote_state
*rs
= get_remote_state ();
8643 int payload_capacity_bytes
;
8644 int payload_length_bytes
;
8646 if (packet_format
!= 'X' && packet_format
!= 'M')
8647 internal_error (__FILE__
, __LINE__
,
8648 _("remote_write_bytes_aux: bad packet format"));
8651 return TARGET_XFER_EOF
;
8653 payload_capacity_bytes
= get_memory_write_packet_size ();
8655 /* The packet buffer will be large enough for the payload;
8656 get_memory_packet_size ensures this. */
8659 /* Compute the size of the actual payload by subtracting out the
8660 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8662 payload_capacity_bytes
-= strlen ("$,:#NN");
8664 /* The comma won't be used. */
8665 payload_capacity_bytes
+= 1;
8666 payload_capacity_bytes
-= strlen (header
);
8667 payload_capacity_bytes
-= hexnumlen (memaddr
);
8669 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8671 strcat (rs
->buf
.data (), header
);
8672 p
= rs
->buf
.data () + strlen (header
);
8674 /* Compute a best guess of the number of bytes actually transfered. */
8675 if (packet_format
== 'X')
8677 /* Best guess at number of bytes that will fit. */
8678 todo_units
= std::min (len_units
,
8679 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8681 payload_capacity_bytes
-= hexnumlen (todo_units
);
8682 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8686 /* Number of bytes that will fit. */
8688 = std::min (len_units
,
8689 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8691 payload_capacity_bytes
-= hexnumlen (todo_units
);
8692 todo_units
= std::min (todo_units
,
8693 (payload_capacity_bytes
/ unit_size
) / 2);
8696 if (todo_units
<= 0)
8697 internal_error (__FILE__
, __LINE__
,
8698 _("minimum packet size too small to write data"));
8700 /* If we already need another packet, then try to align the end
8701 of this packet to a useful boundary. */
8702 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8703 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8705 /* Append "<memaddr>". */
8706 memaddr
= remote_address_masked (memaddr
);
8707 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8714 /* Append the length and retain its location and size. It may need to be
8715 adjusted once the packet body has been created. */
8717 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8725 /* Append the packet body. */
8726 if (packet_format
== 'X')
8728 /* Binary mode. Send target system values byte by byte, in
8729 increasing byte addresses. Only escape certain critical
8731 payload_length_bytes
=
8732 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8733 &units_written
, payload_capacity_bytes
);
8735 /* If not all TODO units fit, then we'll need another packet. Make
8736 a second try to keep the end of the packet aligned. Don't do
8737 this if the packet is tiny. */
8738 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8742 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8744 if (new_todo_units
!= units_written
)
8745 payload_length_bytes
=
8746 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8747 (gdb_byte
*) p
, &units_written
,
8748 payload_capacity_bytes
);
8751 p
+= payload_length_bytes
;
8752 if (use_length
&& units_written
< todo_units
)
8754 /* Escape chars have filled up the buffer prematurely,
8755 and we have actually sent fewer units than planned.
8756 Fix-up the length field of the packet. Use the same
8757 number of characters as before. */
8758 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8760 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8765 /* Normal mode: Send target system values byte by byte, in
8766 increasing byte addresses. Each byte is encoded as a two hex
8768 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8769 units_written
= todo_units
;
8772 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8773 getpkt (&rs
->buf
, 0);
8775 if (rs
->buf
[0] == 'E')
8776 return TARGET_XFER_E_IO
;
8778 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8779 send fewer units than we'd planned. */
8780 *xfered_len_units
= (ULONGEST
) units_written
;
8781 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8784 /* Write memory data directly to the remote machine.
8785 This does not inform the data cache; the data cache uses this.
8786 MEMADDR is the address in the remote memory space.
8787 MYADDR is the address of the buffer in our space.
8788 LEN is the number of bytes.
8790 Return the transferred status, error or OK (an
8791 'enum target_xfer_status' value). Save the number of bytes
8792 transferred in *XFERED_LEN. Only transfer a single packet. */
8795 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
8796 ULONGEST len
, int unit_size
,
8797 ULONGEST
*xfered_len
)
8799 const char *packet_format
= NULL
;
8801 /* Check whether the target supports binary download. */
8802 check_binary_download (memaddr
);
8804 switch (packet_support (PACKET_X
))
8807 packet_format
= "X";
8809 case PACKET_DISABLE
:
8810 packet_format
= "M";
8812 case PACKET_SUPPORT_UNKNOWN
:
8813 internal_error (__FILE__
, __LINE__
,
8814 _("remote_write_bytes: bad internal state"));
8816 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8819 return remote_write_bytes_aux (packet_format
,
8820 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8821 packet_format
[0], 1);
8824 /* Read memory data directly from the remote machine.
8825 This does not use the data cache; the data cache uses this.
8826 MEMADDR is the address in the remote memory space.
8827 MYADDR is the address of the buffer in our space.
8828 LEN_UNITS is the number of addressable memory units to read..
8829 UNIT_SIZE is the length in bytes of an addressable unit.
8831 Return the transferred status, error or OK (an
8832 'enum target_xfer_status' value). Save the number of bytes
8833 transferred in *XFERED_LEN_UNITS.
8835 See the comment of remote_write_bytes_aux for an example of
8836 memory read/write exchange between gdb and the stub. */
8839 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
8841 int unit_size
, ULONGEST
*xfered_len_units
)
8843 struct remote_state
*rs
= get_remote_state ();
8844 int buf_size_bytes
; /* Max size of packet output buffer. */
8849 buf_size_bytes
= get_memory_read_packet_size ();
8850 /* The packet buffer will be large enough for the payload;
8851 get_memory_packet_size ensures this. */
8853 /* Number of units that will fit. */
8854 todo_units
= std::min (len_units
,
8855 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8857 /* Construct "m"<memaddr>","<len>". */
8858 memaddr
= remote_address_masked (memaddr
);
8859 p
= rs
->buf
.data ();
8861 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8863 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8866 getpkt (&rs
->buf
, 0);
8867 if (rs
->buf
[0] == 'E'
8868 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8869 && rs
->buf
[3] == '\0')
8870 return TARGET_XFER_E_IO
;
8871 /* Reply describes memory byte by byte, each byte encoded as two hex
8873 p
= rs
->buf
.data ();
8874 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8875 /* Return what we have. Let higher layers handle partial reads. */
8876 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8877 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8880 /* Using the set of read-only target sections of remote, read live
8883 For interface/parameters/return description see target.h,
8887 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
8891 ULONGEST
*xfered_len
)
8893 struct target_section
*secp
;
8895 secp
= target_section_by_addr (this, memaddr
);
8897 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
8899 ULONGEST memend
= memaddr
+ len
;
8901 target_section_table
*table
= target_get_section_table (this);
8902 for (target_section
&p
: *table
)
8904 if (memaddr
>= p
.addr
)
8906 if (memend
<= p
.endaddr
)
8908 /* Entire transfer is within this section. */
8909 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8912 else if (memaddr
>= p
.endaddr
)
8914 /* This section ends before the transfer starts. */
8919 /* This section overlaps the transfer. Just do half. */
8920 len
= p
.endaddr
- memaddr
;
8921 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8928 return TARGET_XFER_EOF
;
8931 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8932 first if the requested memory is unavailable in traceframe.
8933 Otherwise, fall back to remote_read_bytes_1. */
8936 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
8937 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8938 ULONGEST
*xfered_len
)
8941 return TARGET_XFER_EOF
;
8943 if (get_traceframe_number () != -1)
8945 std::vector
<mem_range
> available
;
8947 /* If we fail to get the set of available memory, then the
8948 target does not support querying traceframe info, and so we
8949 attempt reading from the traceframe anyway (assuming the
8950 target implements the old QTro packet then). */
8951 if (traceframe_available_memory (&available
, memaddr
, len
))
8953 if (available
.empty () || available
[0].start
!= memaddr
)
8955 enum target_xfer_status res
;
8957 /* Don't read into the traceframe's available
8959 if (!available
.empty ())
8961 LONGEST oldlen
= len
;
8963 len
= available
[0].start
- memaddr
;
8964 gdb_assert (len
<= oldlen
);
8967 /* This goes through the topmost target again. */
8968 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
8969 len
, unit_size
, xfered_len
);
8970 if (res
== TARGET_XFER_OK
)
8971 return TARGET_XFER_OK
;
8974 /* No use trying further, we know some memory starting
8975 at MEMADDR isn't available. */
8977 return (*xfered_len
!= 0) ?
8978 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8982 /* Don't try to read more than how much is available, in
8983 case the target implements the deprecated QTro packet to
8984 cater for older GDBs (the target's knowledge of read-only
8985 sections may be outdated by now). */
8986 len
= available
[0].length
;
8990 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8995 /* Sends a packet with content determined by the printf format string
8996 FORMAT and the remaining arguments, then gets the reply. Returns
8997 whether the packet was a success, a failure, or unknown. */
9000 remote_target::remote_send_printf (const char *format
, ...)
9002 struct remote_state
*rs
= get_remote_state ();
9003 int max_size
= get_remote_packet_size ();
9006 va_start (ap
, format
);
9009 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
9013 if (size
>= max_size
)
9014 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
9016 if (putpkt (rs
->buf
) < 0)
9017 error (_("Communication problem with target."));
9020 getpkt (&rs
->buf
, 0);
9022 return packet_check_result (rs
->buf
);
9025 /* Flash writing can take quite some time. We'll set
9026 effectively infinite timeout for flash operations.
9027 In future, we'll need to decide on a better approach. */
9028 static const int remote_flash_timeout
= 1000;
9031 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9033 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9034 enum packet_result ret
;
9035 scoped_restore restore_timeout
9036 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9038 ret
= remote_send_printf ("vFlashErase:%s,%s",
9039 phex (address
, addr_size
),
9043 case PACKET_UNKNOWN
:
9044 error (_("Remote target does not support flash erase"));
9046 error (_("Error erasing flash with vFlashErase packet"));
9053 remote_target::remote_flash_write (ULONGEST address
,
9054 ULONGEST length
, ULONGEST
*xfered_len
,
9055 const gdb_byte
*data
)
9057 scoped_restore restore_timeout
9058 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9059 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9064 remote_target::flash_done ()
9068 scoped_restore restore_timeout
9069 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9071 ret
= remote_send_printf ("vFlashDone");
9075 case PACKET_UNKNOWN
:
9076 error (_("Remote target does not support vFlashDone"));
9078 error (_("Error finishing flash operation"));
9085 remote_target::files_info ()
9087 puts_filtered ("Debugging a target over a serial line.\n");
9090 /* Stuff for dealing with the packets which are part of this protocol.
9091 See comment at top of file for details. */
9093 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9094 error to higher layers. Called when a serial error is detected.
9095 The exception message is STRING, followed by a colon and a blank,
9096 the system error message for errno at function entry and final dot
9097 for output compatibility with throw_perror_with_name. */
9100 unpush_and_perror (remote_target
*target
, const char *string
)
9102 int saved_errno
= errno
;
9104 remote_unpush_target (target
);
9105 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9106 safe_strerror (saved_errno
));
9109 /* Read a single character from the remote end. The current quit
9110 handler is overridden to avoid quitting in the middle of packet
9111 sequence, as that would break communication with the remote server.
9112 See remote_serial_quit_handler for more detail. */
9115 remote_target::readchar (int timeout
)
9118 struct remote_state
*rs
= get_remote_state ();
9121 scoped_restore restore_quit_target
9122 = make_scoped_restore (&curr_quit_handler_target
, this);
9123 scoped_restore restore_quit
9124 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9126 rs
->got_ctrlc_during_io
= 0;
9128 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9130 if (rs
->got_ctrlc_during_io
)
9137 switch ((enum serial_rc
) ch
)
9140 remote_unpush_target (this);
9141 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9144 unpush_and_perror (this, _("Remote communication error. "
9145 "Target disconnected."));
9147 case SERIAL_TIMEOUT
:
9153 /* Wrapper for serial_write that closes the target and throws if
9154 writing fails. The current quit handler is overridden to avoid
9155 quitting in the middle of packet sequence, as that would break
9156 communication with the remote server. See
9157 remote_serial_quit_handler for more detail. */
9160 remote_target::remote_serial_write (const char *str
, int len
)
9162 struct remote_state
*rs
= get_remote_state ();
9164 scoped_restore restore_quit_target
9165 = make_scoped_restore (&curr_quit_handler_target
, this);
9166 scoped_restore restore_quit
9167 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9169 rs
->got_ctrlc_during_io
= 0;
9171 if (serial_write (rs
->remote_desc
, str
, len
))
9173 unpush_and_perror (this, _("Remote communication error. "
9174 "Target disconnected."));
9177 if (rs
->got_ctrlc_during_io
)
9181 /* Return a string representing an escaped version of BUF, of len N.
9182 E.g. \n is converted to \\n, \t to \\t, etc. */
9185 escape_buffer (const char *buf
, int n
)
9189 stb
.putstrn (buf
, n
, '\\');
9190 return std::move (stb
.string ());
9193 /* Display a null-terminated packet on stdout, for debugging, using C
9197 print_packet (const char *buf
)
9199 puts_filtered ("\"");
9200 fputstr_filtered (buf
, '"', gdb_stdout
);
9201 puts_filtered ("\"");
9205 remote_target::putpkt (const char *buf
)
9207 return putpkt_binary (buf
, strlen (buf
));
9210 /* Wrapper around remote_target::putpkt to avoid exporting
9214 putpkt (remote_target
*remote
, const char *buf
)
9216 return remote
->putpkt (buf
);
9219 /* Send a packet to the remote machine, with error checking. The data
9220 of the packet is in BUF. The string in BUF can be at most
9221 get_remote_packet_size () - 5 to account for the $, # and checksum,
9222 and for a possible /0 if we are debugging (remote_debug) and want
9223 to print the sent packet as a string. */
9226 remote_target::putpkt_binary (const char *buf
, int cnt
)
9228 struct remote_state
*rs
= get_remote_state ();
9230 unsigned char csum
= 0;
9231 gdb::def_vector
<char> data (cnt
+ 6);
9232 char *buf2
= data
.data ();
9238 /* Catch cases like trying to read memory or listing threads while
9239 we're waiting for a stop reply. The remote server wouldn't be
9240 ready to handle this request, so we'd hang and timeout. We don't
9241 have to worry about this in synchronous mode, because in that
9242 case it's not possible to issue a command while the target is
9243 running. This is not a problem in non-stop mode, because in that
9244 case, the stub is always ready to process serial input. */
9245 if (!target_is_non_stop_p ()
9246 && target_is_async_p ()
9247 && rs
->waiting_for_stop_reply
)
9249 error (_("Cannot execute this command while the target is running.\n"
9250 "Use the \"interrupt\" command to stop the target\n"
9251 "and then try again."));
9254 /* We're sending out a new packet. Make sure we don't look at a
9255 stale cached response. */
9256 rs
->cached_wait_status
= 0;
9258 /* Copy the packet into buffer BUF2, encapsulating it
9259 and giving it a checksum. */
9264 for (i
= 0; i
< cnt
; i
++)
9270 *p
++ = tohex ((csum
>> 4) & 0xf);
9271 *p
++ = tohex (csum
& 0xf);
9273 /* Send it over and over until we get a positive ack. */
9277 int started_error_output
= 0;
9283 int len
= (int) (p
- buf2
);
9286 if (remote_packet_max_chars
< 0)
9289 max_chars
= remote_packet_max_chars
;
9292 = escape_buffer (buf2
, std::min (len
, max_chars
));
9294 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
9296 if (len
> max_chars
)
9297 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9300 fprintf_unfiltered (gdb_stdlog
, "...");
9302 gdb_flush (gdb_stdlog
);
9304 remote_serial_write (buf2
, p
- buf2
);
9306 /* If this is a no acks version of the remote protocol, send the
9307 packet and move on. */
9311 /* Read until either a timeout occurs (-2) or '+' is read.
9312 Handle any notification that arrives in the mean time. */
9315 ch
= readchar (remote_timeout
);
9323 case SERIAL_TIMEOUT
:
9326 if (started_error_output
)
9328 putchar_unfiltered ('\n');
9329 started_error_output
= 0;
9338 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
9342 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
9344 case SERIAL_TIMEOUT
:
9348 break; /* Retransmit buffer. */
9352 fprintf_unfiltered (gdb_stdlog
,
9353 "Packet instead of Ack, ignoring it\n");
9354 /* It's probably an old response sent because an ACK
9355 was lost. Gobble up the packet and ack it so it
9356 doesn't get retransmitted when we resend this
9359 remote_serial_write ("+", 1);
9360 continue; /* Now, go look for +. */
9367 /* If we got a notification, handle it, and go back to looking
9369 /* We've found the start of a notification. Now
9370 collect the data. */
9371 val
= read_frame (&rs
->buf
);
9376 std::string str
= escape_buffer (rs
->buf
.data (), val
);
9378 fprintf_unfiltered (gdb_stdlog
,
9379 " Notification received: %s\n",
9382 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9383 /* We're in sync now, rewait for the ack. */
9390 if (!started_error_output
)
9392 started_error_output
= 1;
9393 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9395 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9396 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
.data ());
9405 if (!started_error_output
)
9407 started_error_output
= 1;
9408 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9410 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9414 break; /* Here to retransmit. */
9418 /* This is wrong. If doing a long backtrace, the user should be
9419 able to get out next time we call QUIT, without anything as
9420 violent as interrupt_query. If we want to provide a way out of
9421 here without getting to the next QUIT, it should be based on
9422 hitting ^C twice as in remote_wait. */
9434 /* Come here after finding the start of a frame when we expected an
9435 ack. Do our best to discard the rest of this packet. */
9438 remote_target::skip_frame ()
9444 c
= readchar (remote_timeout
);
9447 case SERIAL_TIMEOUT
:
9448 /* Nothing we can do. */
9451 /* Discard the two bytes of checksum and stop. */
9452 c
= readchar (remote_timeout
);
9454 c
= readchar (remote_timeout
);
9457 case '*': /* Run length encoding. */
9458 /* Discard the repeat count. */
9459 c
= readchar (remote_timeout
);
9464 /* A regular character. */
9470 /* Come here after finding the start of the frame. Collect the rest
9471 into *BUF, verifying the checksum, length, and handling run-length
9472 compression. NUL terminate the buffer. If there is not enough room,
9475 Returns -1 on error, number of characters in buffer (ignoring the
9476 trailing NULL) on success. (could be extended to return one of the
9477 SERIAL status indications). */
9480 remote_target::read_frame (gdb::char_vector
*buf_p
)
9485 char *buf
= buf_p
->data ();
9486 struct remote_state
*rs
= get_remote_state ();
9493 c
= readchar (remote_timeout
);
9496 case SERIAL_TIMEOUT
:
9498 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
9502 fputs_filtered ("Saw new packet start in middle of old one\n",
9504 return -1; /* Start a new packet, count retries. */
9507 unsigned char pktcsum
;
9513 check_0
= readchar (remote_timeout
);
9515 check_1
= readchar (remote_timeout
);
9517 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9520 fputs_filtered ("Timeout in checksum, retrying\n",
9524 else if (check_0
< 0 || check_1
< 0)
9527 fputs_filtered ("Communication error in checksum\n",
9532 /* Don't recompute the checksum; with no ack packets we
9533 don't have any way to indicate a packet retransmission
9538 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9539 if (csum
== pktcsum
)
9544 std::string str
= escape_buffer (buf
, bc
);
9546 fprintf_unfiltered (gdb_stdlog
,
9547 "Bad checksum, sentsum=0x%x, "
9548 "csum=0x%x, buf=%s\n",
9549 pktcsum
, csum
, str
.c_str ());
9551 /* Number of characters in buffer ignoring trailing
9555 case '*': /* Run length encoding. */
9560 c
= readchar (remote_timeout
);
9562 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9564 /* The character before ``*'' is repeated. */
9566 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9568 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9570 /* Make some more room in the buffer. */
9571 buf_p
->resize (buf_p
->size () + repeat
);
9572 buf
= buf_p
->data ();
9575 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9581 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9585 if (bc
>= buf_p
->size () - 1)
9587 /* Make some more room in the buffer. */
9588 buf_p
->resize (buf_p
->size () * 2);
9589 buf
= buf_p
->data ();
9599 /* Set this to the maximum number of seconds to wait instead of waiting forever
9600 in target_wait(). If this timer times out, then it generates an error and
9601 the command is aborted. This replaces most of the need for timeouts in the
9602 GDB test suite, and makes it possible to distinguish between a hung target
9603 and one with slow communications. */
9605 static int watchdog
= 0;
9607 show_watchdog (struct ui_file
*file
, int from_tty
,
9608 struct cmd_list_element
*c
, const char *value
)
9610 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
9613 /* Read a packet from the remote machine, with error checking, and
9614 store it in *BUF. Resize *BUF if necessary to hold the result. If
9615 FOREVER, wait forever rather than timing out; this is used (in
9616 synchronous mode) to wait for a target that is is executing user
9618 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9619 don't have to change all the calls to getpkt to deal with the
9620 return value, because at the moment I don't know what the right
9621 thing to do it for those. */
9624 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9626 getpkt_sane (buf
, forever
);
9630 /* Read a packet from the remote machine, with error checking, and
9631 store it in *BUF. Resize *BUF if necessary to hold the result. If
9632 FOREVER, wait forever rather than timing out; this is used (in
9633 synchronous mode) to wait for a target that is is executing user
9634 code to stop. If FOREVER == 0, this function is allowed to time
9635 out gracefully and return an indication of this to the caller.
9636 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9637 consider receiving a notification enough reason to return to the
9638 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9639 holds a notification or not (a regular packet). */
9642 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9643 int forever
, int expecting_notif
,
9646 struct remote_state
*rs
= get_remote_state ();
9652 /* We're reading a new response. Make sure we don't look at a
9653 previously cached response. */
9654 rs
->cached_wait_status
= 0;
9656 strcpy (buf
->data (), "timeout");
9659 timeout
= watchdog
> 0 ? watchdog
: -1;
9660 else if (expecting_notif
)
9661 timeout
= 0; /* There should already be a char in the buffer. If
9664 timeout
= remote_timeout
;
9668 /* Process any number of notifications, and then return when
9672 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9674 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9676 /* This can loop forever if the remote side sends us
9677 characters continuously, but if it pauses, we'll get
9678 SERIAL_TIMEOUT from readchar because of timeout. Then
9679 we'll count that as a retry.
9681 Note that even when forever is set, we will only wait
9682 forever prior to the start of a packet. After that, we
9683 expect characters to arrive at a brisk pace. They should
9684 show up within remote_timeout intervals. */
9686 c
= readchar (timeout
);
9687 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9689 if (c
== SERIAL_TIMEOUT
)
9691 if (expecting_notif
)
9692 return -1; /* Don't complain, it's normal to not get
9693 anything in this case. */
9695 if (forever
) /* Watchdog went off? Kill the target. */
9697 remote_unpush_target (this);
9698 throw_error (TARGET_CLOSE_ERROR
,
9699 _("Watchdog timeout has expired. "
9700 "Target detached."));
9703 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9707 /* We've found the start of a packet or notification.
9708 Now collect the data. */
9709 val
= read_frame (buf
);
9714 remote_serial_write ("-", 1);
9717 if (tries
> MAX_TRIES
)
9719 /* We have tried hard enough, and just can't receive the
9720 packet/notification. Give up. */
9721 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9723 /* Skip the ack char if we're in no-ack mode. */
9724 if (!rs
->noack_mode
)
9725 remote_serial_write ("+", 1);
9729 /* If we got an ordinary packet, return that to our caller. */
9736 if (remote_packet_max_chars
< 0)
9739 max_chars
= remote_packet_max_chars
;
9742 = escape_buffer (buf
->data (),
9743 std::min (val
, max_chars
));
9745 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9748 if (val
> max_chars
)
9749 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9752 fprintf_unfiltered (gdb_stdlog
, "\n");
9755 /* Skip the ack char if we're in no-ack mode. */
9756 if (!rs
->noack_mode
)
9757 remote_serial_write ("+", 1);
9758 if (is_notif
!= NULL
)
9763 /* If we got a notification, handle it, and go back to looking
9767 gdb_assert (c
== '%');
9771 std::string str
= escape_buffer (buf
->data (), val
);
9773 fprintf_unfiltered (gdb_stdlog
,
9774 " Notification received: %s\n",
9777 if (is_notif
!= NULL
)
9780 handle_notification (rs
->notif_state
, buf
->data ());
9782 /* Notifications require no acknowledgement. */
9784 if (expecting_notif
)
9791 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
9793 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
9797 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
9800 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
9803 /* Kill any new fork children of process PID that haven't been
9804 processed by follow_fork. */
9807 remote_target::kill_new_fork_children (int pid
)
9809 remote_state
*rs
= get_remote_state ();
9810 struct notif_client
*notif
= ¬if_client_stop
;
9812 /* Kill the fork child threads of any threads in process PID
9813 that are stopped at a fork event. */
9814 for (thread_info
*thread
: all_non_exited_threads (this))
9816 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9818 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9820 int child_pid
= ws
->value
.related_pid
.pid ();
9823 res
= remote_vkill (child_pid
);
9825 error (_("Can't kill fork child process %d"), child_pid
);
9829 /* Check for any pending fork events (not reported or processed yet)
9830 in process PID and kill those fork child threads as well. */
9831 remote_notif_get_pending_events (notif
);
9832 for (auto &event
: rs
->stop_reply_queue
)
9833 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
9835 int child_pid
= event
->ws
.value
.related_pid
.pid ();
9838 res
= remote_vkill (child_pid
);
9840 error (_("Can't kill fork child process %d"), child_pid
);
9845 /* Target hook to kill the current inferior. */
9848 remote_target::kill ()
9851 int pid
= inferior_ptid
.pid ();
9852 struct remote_state
*rs
= get_remote_state ();
9854 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9856 /* If we're stopped while forking and we haven't followed yet,
9857 kill the child task. We need to do this before killing the
9858 parent task because if this is a vfork then the parent will
9860 kill_new_fork_children (pid
);
9862 res
= remote_vkill (pid
);
9865 target_mourn_inferior (inferior_ptid
);
9870 /* If we are in 'target remote' mode and we are killing the only
9871 inferior, then we will tell gdbserver to exit and unpush the
9873 if (res
== -1 && !remote_multi_process_p (rs
)
9874 && number_of_live_inferiors (this) == 1)
9878 /* We've killed the remote end, we get to mourn it. If we are
9879 not in extended mode, mourning the inferior also unpushes
9880 remote_ops from the target stack, which closes the remote
9882 target_mourn_inferior (inferior_ptid
);
9887 error (_("Can't kill process"));
9890 /* Send a kill request to the target using the 'vKill' packet. */
9893 remote_target::remote_vkill (int pid
)
9895 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9898 remote_state
*rs
= get_remote_state ();
9900 /* Tell the remote target to detach. */
9901 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
9903 getpkt (&rs
->buf
, 0);
9905 switch (packet_ok (rs
->buf
,
9906 &remote_protocol_packets
[PACKET_vKill
]))
9912 case PACKET_UNKNOWN
:
9915 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9919 /* Send a kill request to the target using the 'k' packet. */
9922 remote_target::remote_kill_k ()
9924 /* Catch errors so the user can quit from gdb even when we
9925 aren't on speaking terms with the remote system. */
9930 catch (const gdb_exception_error
&ex
)
9932 if (ex
.error
== TARGET_CLOSE_ERROR
)
9934 /* If we got an (EOF) error that caused the target
9935 to go away, then we're done, that's what we wanted.
9936 "k" is susceptible to cause a premature EOF, given
9937 that the remote server isn't actually required to
9938 reply to "k", and it can happen that it doesn't
9939 even get to reply ACK to the "k". */
9943 /* Otherwise, something went wrong. We didn't actually kill
9944 the target. Just propagate the exception, and let the
9945 user or higher layers decide what to do. */
9951 remote_target::mourn_inferior ()
9953 struct remote_state
*rs
= get_remote_state ();
9955 /* We're no longer interested in notification events of an inferior
9956 that exited or was killed/detached. */
9957 discard_pending_stop_replies (current_inferior ());
9959 /* In 'target remote' mode with one inferior, we close the connection. */
9960 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
9962 remote_unpush_target (this);
9966 /* In case we got here due to an error, but we're going to stay
9968 rs
->waiting_for_stop_reply
= 0;
9970 /* If the current general thread belonged to the process we just
9971 detached from or has exited, the remote side current general
9972 thread becomes undefined. Considering a case like this:
9974 - We just got here due to a detach.
9975 - The process that we're detaching from happens to immediately
9976 report a global breakpoint being hit in non-stop mode, in the
9977 same thread we had selected before.
9978 - GDB attaches to this process again.
9979 - This event happens to be the next event we handle.
9981 GDB would consider that the current general thread didn't need to
9982 be set on the stub side (with Hg), since for all it knew,
9983 GENERAL_THREAD hadn't changed.
9985 Notice that although in all-stop mode, the remote server always
9986 sets the current thread to the thread reporting the stop event,
9987 that doesn't happen in non-stop mode; in non-stop, the stub *must
9988 not* change the current thread when reporting a breakpoint hit,
9989 due to the decoupling of event reporting and event handling.
9991 To keep things simple, we always invalidate our notion of the
9993 record_currthread (rs
, minus_one_ptid
);
9995 /* Call common code to mark the inferior as not running. */
9996 generic_mourn_inferior ();
10000 extended_remote_target::supports_disable_randomization ()
10002 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
10006 remote_target::extended_remote_disable_randomization (int val
)
10008 struct remote_state
*rs
= get_remote_state ();
10011 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10012 "QDisableRandomization:%x", val
);
10014 reply
= remote_get_noisy_reply ();
10015 if (*reply
== '\0')
10016 error (_("Target does not support QDisableRandomization."));
10017 if (strcmp (reply
, "OK") != 0)
10018 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10022 remote_target::extended_remote_run (const std::string
&args
)
10024 struct remote_state
*rs
= get_remote_state ();
10026 const char *remote_exec_file
= get_remote_exec_file ();
10028 /* If the user has disabled vRun support, or we have detected that
10029 support is not available, do not try it. */
10030 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10033 strcpy (rs
->buf
.data (), "vRun;");
10034 len
= strlen (rs
->buf
.data ());
10036 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10037 error (_("Remote file name too long for run packet"));
10038 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10039 strlen (remote_exec_file
));
10041 if (!args
.empty ())
10045 gdb_argv
argv (args
.c_str ());
10046 for (i
= 0; argv
[i
] != NULL
; i
++)
10048 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10049 error (_("Argument list too long for run packet"));
10050 rs
->buf
[len
++] = ';';
10051 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10056 rs
->buf
[len
++] = '\0';
10059 getpkt (&rs
->buf
, 0);
10061 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10064 /* We have a wait response. All is well. */
10066 case PACKET_UNKNOWN
:
10069 if (remote_exec_file
[0] == '\0')
10070 error (_("Running the default executable on the remote target failed; "
10071 "try \"set remote exec-file\"?"));
10073 error (_("Running \"%s\" on the remote target failed"),
10076 gdb_assert_not_reached (_("bad switch"));
10080 /* Helper function to send set/unset environment packets. ACTION is
10081 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10082 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10086 remote_target::send_environment_packet (const char *action
,
10087 const char *packet
,
10090 remote_state
*rs
= get_remote_state ();
10092 /* Convert the environment variable to an hex string, which
10093 is the best format to be transmitted over the wire. */
10094 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10097 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10098 "%s:%s", packet
, encoded_value
.c_str ());
10101 getpkt (&rs
->buf
, 0);
10102 if (strcmp (rs
->buf
.data (), "OK") != 0)
10103 warning (_("Unable to %s environment variable '%s' on remote."),
10107 /* Helper function to handle the QEnvironment* packets. */
10110 remote_target::extended_remote_environment_support ()
10112 remote_state
*rs
= get_remote_state ();
10114 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10116 putpkt ("QEnvironmentReset");
10117 getpkt (&rs
->buf
, 0);
10118 if (strcmp (rs
->buf
.data (), "OK") != 0)
10119 warning (_("Unable to reset environment on remote."));
10122 gdb_environ
*e
= ¤t_inferior ()->environment
;
10124 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10125 for (const std::string
&el
: e
->user_set_env ())
10126 send_environment_packet ("set", "QEnvironmentHexEncoded",
10129 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10130 for (const std::string
&el
: e
->user_unset_env ())
10131 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10134 /* Helper function to set the current working directory for the
10135 inferior in the remote target. */
10138 remote_target::extended_remote_set_inferior_cwd ()
10140 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10142 const char *inferior_cwd
= get_inferior_cwd ();
10143 remote_state
*rs
= get_remote_state ();
10145 if (inferior_cwd
!= NULL
)
10147 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10148 strlen (inferior_cwd
));
10150 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10151 "QSetWorkingDir:%s", hexpath
.c_str ());
10155 /* An empty inferior_cwd means that the user wants us to
10156 reset the remote server's inferior's cwd. */
10157 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10158 "QSetWorkingDir:");
10162 getpkt (&rs
->buf
, 0);
10163 if (packet_ok (rs
->buf
,
10164 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10167 Remote replied unexpectedly while setting the inferior's working\n\
10174 /* In the extended protocol we want to be able to do things like
10175 "run" and have them basically work as expected. So we need
10176 a special create_inferior function. We support changing the
10177 executable file and the command line arguments, but not the
10181 extended_remote_target::create_inferior (const char *exec_file
,
10182 const std::string
&args
,
10183 char **env
, int from_tty
)
10187 struct remote_state
*rs
= get_remote_state ();
10188 const char *remote_exec_file
= get_remote_exec_file ();
10190 /* If running asynchronously, register the target file descriptor
10191 with the event loop. */
10192 if (target_can_async_p ())
10195 /* Disable address space randomization if requested (and supported). */
10196 if (supports_disable_randomization ())
10197 extended_remote_disable_randomization (disable_randomization
);
10199 /* If startup-with-shell is on, we inform gdbserver to start the
10200 remote inferior using a shell. */
10201 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10203 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10204 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10206 getpkt (&rs
->buf
, 0);
10207 if (strcmp (rs
->buf
.data (), "OK") != 0)
10209 Remote replied unexpectedly while setting startup-with-shell: %s"),
10213 extended_remote_environment_support ();
10215 extended_remote_set_inferior_cwd ();
10217 /* Now restart the remote server. */
10218 run_worked
= extended_remote_run (args
) != -1;
10221 /* vRun was not supported. Fail if we need it to do what the
10223 if (remote_exec_file
[0])
10224 error (_("Remote target does not support \"set remote exec-file\""));
10225 if (!args
.empty ())
10226 error (_("Remote target does not support \"set args\" or run ARGS"));
10228 /* Fall back to "R". */
10229 extended_remote_restart ();
10232 /* vRun's success return is a stop reply. */
10233 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10234 add_current_inferior_and_thread (stop_reply
);
10236 /* Get updated offsets, if the stub uses qOffsets. */
10241 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10242 the list of conditions (in agent expression bytecode format), if any, the
10243 target needs to evaluate. The output is placed into the packet buffer
10244 started from BUF and ended at BUF_END. */
10247 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10248 struct bp_target_info
*bp_tgt
, char *buf
,
10251 if (bp_tgt
->conditions
.empty ())
10254 buf
+= strlen (buf
);
10255 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10258 /* Send conditions to the target. */
10259 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10261 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10262 buf
+= strlen (buf
);
10263 for (int i
= 0; i
< aexpr
->len
; ++i
)
10264 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10271 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10272 struct bp_target_info
*bp_tgt
, char *buf
)
10274 if (bp_tgt
->tcommands
.empty ())
10277 buf
+= strlen (buf
);
10279 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10280 buf
+= strlen (buf
);
10282 /* Concatenate all the agent expressions that are commands into the
10284 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10286 sprintf (buf
, "X%x,", aexpr
->len
);
10287 buf
+= strlen (buf
);
10288 for (int i
= 0; i
< aexpr
->len
; ++i
)
10289 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10294 /* Insert a breakpoint. On targets that have software breakpoint
10295 support, we ask the remote target to do the work; on targets
10296 which don't, we insert a traditional memory breakpoint. */
10299 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10300 struct bp_target_info
*bp_tgt
)
10302 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10303 If it succeeds, then set the support to PACKET_ENABLE. If it
10304 fails, and the user has explicitly requested the Z support then
10305 report an error, otherwise, mark it disabled and go on. */
10307 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10309 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10310 struct remote_state
*rs
;
10313 /* Make sure the remote is pointing at the right process, if
10315 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10316 set_general_process ();
10318 rs
= get_remote_state ();
10319 p
= rs
->buf
.data ();
10320 endbuf
= p
+ get_remote_packet_size ();
10325 addr
= (ULONGEST
) remote_address_masked (addr
);
10326 p
+= hexnumstr (p
, addr
);
10327 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10329 if (supports_evaluation_of_breakpoint_conditions ())
10330 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10332 if (can_run_breakpoint_commands ())
10333 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10336 getpkt (&rs
->buf
, 0);
10338 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10344 case PACKET_UNKNOWN
:
10349 /* If this breakpoint has target-side commands but this stub doesn't
10350 support Z0 packets, throw error. */
10351 if (!bp_tgt
->tcommands
.empty ())
10352 throw_error (NOT_SUPPORTED_ERROR
, _("\
10353 Target doesn't support breakpoints that have target side commands."));
10355 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10359 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10360 struct bp_target_info
*bp_tgt
,
10361 enum remove_bp_reason reason
)
10363 CORE_ADDR addr
= bp_tgt
->placed_address
;
10364 struct remote_state
*rs
= get_remote_state ();
10366 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10368 char *p
= rs
->buf
.data ();
10369 char *endbuf
= p
+ get_remote_packet_size ();
10371 /* Make sure the remote is pointing at the right process, if
10373 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10374 set_general_process ();
10380 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10381 p
+= hexnumstr (p
, addr
);
10382 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10385 getpkt (&rs
->buf
, 0);
10387 return (rs
->buf
[0] == 'E');
10390 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10393 static enum Z_packet_type
10394 watchpoint_to_Z_packet (int type
)
10399 return Z_PACKET_WRITE_WP
;
10402 return Z_PACKET_READ_WP
;
10405 return Z_PACKET_ACCESS_WP
;
10408 internal_error (__FILE__
, __LINE__
,
10409 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10414 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10415 enum target_hw_bp_type type
, struct expression
*cond
)
10417 struct remote_state
*rs
= get_remote_state ();
10418 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10420 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10422 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10425 /* Make sure the remote is pointing at the right process, if
10427 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10428 set_general_process ();
10430 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10431 p
= strchr (rs
->buf
.data (), '\0');
10432 addr
= remote_address_masked (addr
);
10433 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10434 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10437 getpkt (&rs
->buf
, 0);
10439 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10443 case PACKET_UNKNOWN
:
10448 internal_error (__FILE__
, __LINE__
,
10449 _("remote_insert_watchpoint: reached end of function"));
10453 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10454 CORE_ADDR start
, int length
)
10456 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10458 return diff
< length
;
10463 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10464 enum target_hw_bp_type type
, struct expression
*cond
)
10466 struct remote_state
*rs
= get_remote_state ();
10467 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10469 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10471 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10474 /* Make sure the remote is pointing at the right process, if
10476 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10477 set_general_process ();
10479 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10480 p
= strchr (rs
->buf
.data (), '\0');
10481 addr
= remote_address_masked (addr
);
10482 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10483 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10485 getpkt (&rs
->buf
, 0);
10487 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10490 case PACKET_UNKNOWN
:
10495 internal_error (__FILE__
, __LINE__
,
10496 _("remote_remove_watchpoint: reached end of function"));
10500 static int remote_hw_watchpoint_limit
= -1;
10501 static int remote_hw_watchpoint_length_limit
= -1;
10502 static int remote_hw_breakpoint_limit
= -1;
10505 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10507 if (remote_hw_watchpoint_length_limit
== 0)
10509 else if (remote_hw_watchpoint_length_limit
< 0)
10511 else if (len
<= remote_hw_watchpoint_length_limit
)
10518 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10520 if (type
== bp_hardware_breakpoint
)
10522 if (remote_hw_breakpoint_limit
== 0)
10524 else if (remote_hw_breakpoint_limit
< 0)
10526 else if (cnt
<= remote_hw_breakpoint_limit
)
10531 if (remote_hw_watchpoint_limit
== 0)
10533 else if (remote_hw_watchpoint_limit
< 0)
10537 else if (cnt
<= remote_hw_watchpoint_limit
)
10543 /* The to_stopped_by_sw_breakpoint method of target remote. */
10546 remote_target::stopped_by_sw_breakpoint ()
10548 struct thread_info
*thread
= inferior_thread ();
10550 return (thread
->priv
!= NULL
10551 && (get_remote_thread_info (thread
)->stop_reason
10552 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10555 /* The to_supports_stopped_by_sw_breakpoint method of target
10559 remote_target::supports_stopped_by_sw_breakpoint ()
10561 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10564 /* The to_stopped_by_hw_breakpoint method of target remote. */
10567 remote_target::stopped_by_hw_breakpoint ()
10569 struct thread_info
*thread
= inferior_thread ();
10571 return (thread
->priv
!= NULL
10572 && (get_remote_thread_info (thread
)->stop_reason
10573 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10576 /* The to_supports_stopped_by_hw_breakpoint method of target
10580 remote_target::supports_stopped_by_hw_breakpoint ()
10582 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10586 remote_target::stopped_by_watchpoint ()
10588 struct thread_info
*thread
= inferior_thread ();
10590 return (thread
->priv
!= NULL
10591 && (get_remote_thread_info (thread
)->stop_reason
10592 == TARGET_STOPPED_BY_WATCHPOINT
));
10596 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10598 struct thread_info
*thread
= inferior_thread ();
10600 if (thread
->priv
!= NULL
10601 && (get_remote_thread_info (thread
)->stop_reason
10602 == TARGET_STOPPED_BY_WATCHPOINT
))
10604 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10613 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10614 struct bp_target_info
*bp_tgt
)
10616 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10617 struct remote_state
*rs
;
10621 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10624 /* Make sure the remote is pointing at the right process, if
10626 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10627 set_general_process ();
10629 rs
= get_remote_state ();
10630 p
= rs
->buf
.data ();
10631 endbuf
= p
+ get_remote_packet_size ();
10637 addr
= remote_address_masked (addr
);
10638 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10639 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10641 if (supports_evaluation_of_breakpoint_conditions ())
10642 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10644 if (can_run_breakpoint_commands ())
10645 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10648 getpkt (&rs
->buf
, 0);
10650 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10653 if (rs
->buf
[1] == '.')
10655 message
= strchr (&rs
->buf
[2], '.');
10657 error (_("Remote failure reply: %s"), message
+ 1);
10660 case PACKET_UNKNOWN
:
10665 internal_error (__FILE__
, __LINE__
,
10666 _("remote_insert_hw_breakpoint: reached end of function"));
10671 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10672 struct bp_target_info
*bp_tgt
)
10675 struct remote_state
*rs
= get_remote_state ();
10676 char *p
= rs
->buf
.data ();
10677 char *endbuf
= p
+ get_remote_packet_size ();
10679 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10682 /* Make sure the remote is pointing at the right process, if
10684 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10685 set_general_process ();
10691 addr
= remote_address_masked (bp_tgt
->placed_address
);
10692 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10693 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10696 getpkt (&rs
->buf
, 0);
10698 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10701 case PACKET_UNKNOWN
:
10706 internal_error (__FILE__
, __LINE__
,
10707 _("remote_remove_hw_breakpoint: reached end of function"));
10710 /* Verify memory using the "qCRC:" request. */
10713 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10715 struct remote_state
*rs
= get_remote_state ();
10716 unsigned long host_crc
, target_crc
;
10719 /* It doesn't make sense to use qCRC if the remote target is
10720 connected but not running. */
10721 if (target_has_execution ()
10722 && packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10724 enum packet_result result
;
10726 /* Make sure the remote is pointing at the right process. */
10727 set_general_process ();
10729 /* FIXME: assumes lma can fit into long. */
10730 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10731 (long) lma
, (long) size
);
10734 /* Be clever; compute the host_crc before waiting for target
10736 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10738 getpkt (&rs
->buf
, 0);
10740 result
= packet_ok (rs
->buf
,
10741 &remote_protocol_packets
[PACKET_qCRC
]);
10742 if (result
== PACKET_ERROR
)
10744 else if (result
== PACKET_OK
)
10746 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10747 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10749 return (host_crc
== target_crc
);
10753 return simple_verify_memory (this, data
, lma
, size
);
10756 /* compare-sections command
10758 With no arguments, compares each loadable section in the exec bfd
10759 with the same memory range on the target, and reports mismatches.
10760 Useful for verifying the image on the target against the exec file. */
10763 compare_sections_command (const char *args
, int from_tty
)
10766 const char *sectname
;
10767 bfd_size_type size
;
10770 int mismatched
= 0;
10774 if (!current_program_space
->exec_bfd ())
10775 error (_("command cannot be used without an exec file"));
10777 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10783 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
10785 if (!(s
->flags
& SEC_LOAD
))
10786 continue; /* Skip non-loadable section. */
10788 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10789 continue; /* Skip writeable sections */
10791 size
= bfd_section_size (s
);
10793 continue; /* Skip zero-length section. */
10795 sectname
= bfd_section_name (s
);
10796 if (args
&& strcmp (args
, sectname
) != 0)
10797 continue; /* Not the section selected by user. */
10799 matched
= 1; /* Do this section. */
10802 gdb::byte_vector
sectdata (size
);
10803 bfd_get_section_contents (current_program_space
->exec_bfd (), s
,
10804 sectdata
.data (), 0, size
);
10806 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10809 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10810 paddress (target_gdbarch (), lma
),
10811 paddress (target_gdbarch (), lma
+ size
));
10813 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10814 paddress (target_gdbarch (), lma
),
10815 paddress (target_gdbarch (), lma
+ size
));
10817 printf_filtered ("matched.\n");
10820 printf_filtered ("MIS-MATCHED!\n");
10824 if (mismatched
> 0)
10825 warning (_("One or more sections of the target image does not match\n\
10826 the loaded file\n"));
10827 if (args
&& !matched
)
10828 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10831 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10832 into remote target. The number of bytes written to the remote
10833 target is returned, or -1 for error. */
10836 remote_target::remote_write_qxfer (const char *object_name
,
10837 const char *annex
, const gdb_byte
*writebuf
,
10838 ULONGEST offset
, LONGEST len
,
10839 ULONGEST
*xfered_len
,
10840 struct packet_config
*packet
)
10844 struct remote_state
*rs
= get_remote_state ();
10845 int max_size
= get_memory_write_packet_size ();
10847 if (packet_config_support (packet
) == PACKET_DISABLE
)
10848 return TARGET_XFER_E_IO
;
10850 /* Insert header. */
10851 i
= snprintf (rs
->buf
.data (), max_size
,
10852 "qXfer:%s:write:%s:%s:",
10853 object_name
, annex
? annex
: "",
10854 phex_nz (offset
, sizeof offset
));
10855 max_size
-= (i
+ 1);
10857 /* Escape as much data as fits into rs->buf. */
10858 buf_len
= remote_escape_output
10859 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
10861 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
10862 || getpkt_sane (&rs
->buf
, 0) < 0
10863 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10864 return TARGET_XFER_E_IO
;
10866 unpack_varlen_hex (rs
->buf
.data (), &n
);
10869 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10872 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10873 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10874 number of bytes read is returned, or 0 for EOF, or -1 for error.
10875 The number of bytes read may be less than LEN without indicating an
10876 EOF. PACKET is checked and updated to indicate whether the remote
10877 target supports this object. */
10880 remote_target::remote_read_qxfer (const char *object_name
,
10882 gdb_byte
*readbuf
, ULONGEST offset
,
10884 ULONGEST
*xfered_len
,
10885 struct packet_config
*packet
)
10887 struct remote_state
*rs
= get_remote_state ();
10888 LONGEST i
, n
, packet_len
;
10890 if (packet_config_support (packet
) == PACKET_DISABLE
)
10891 return TARGET_XFER_E_IO
;
10893 /* Check whether we've cached an end-of-object packet that matches
10895 if (rs
->finished_object
)
10897 if (strcmp (object_name
, rs
->finished_object
) == 0
10898 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10899 && offset
== rs
->finished_offset
)
10900 return TARGET_XFER_EOF
;
10903 /* Otherwise, we're now reading something different. Discard
10905 xfree (rs
->finished_object
);
10906 xfree (rs
->finished_annex
);
10907 rs
->finished_object
= NULL
;
10908 rs
->finished_annex
= NULL
;
10911 /* Request only enough to fit in a single packet. The actual data
10912 may not, since we don't know how much of it will need to be escaped;
10913 the target is free to respond with slightly less data. We subtract
10914 five to account for the response type and the protocol frame. */
10915 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10916 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
10917 "qXfer:%s:read:%s:%s,%s",
10918 object_name
, annex
? annex
: "",
10919 phex_nz (offset
, sizeof offset
),
10920 phex_nz (n
, sizeof n
));
10921 i
= putpkt (rs
->buf
);
10923 return TARGET_XFER_E_IO
;
10926 packet_len
= getpkt_sane (&rs
->buf
, 0);
10927 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10928 return TARGET_XFER_E_IO
;
10930 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10931 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
10933 /* 'm' means there is (or at least might be) more data after this
10934 batch. That does not make sense unless there's at least one byte
10935 of data in this reply. */
10936 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10937 error (_("Remote qXfer reply contained no data."));
10939 /* Got some data. */
10940 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
10941 packet_len
- 1, readbuf
, n
);
10943 /* 'l' is an EOF marker, possibly including a final block of data,
10944 or possibly empty. If we have the final block of a non-empty
10945 object, record this fact to bypass a subsequent partial read. */
10946 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10948 rs
->finished_object
= xstrdup (object_name
);
10949 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10950 rs
->finished_offset
= offset
+ i
;
10954 return TARGET_XFER_EOF
;
10958 return TARGET_XFER_OK
;
10962 enum target_xfer_status
10963 remote_target::xfer_partial (enum target_object object
,
10964 const char *annex
, gdb_byte
*readbuf
,
10965 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10966 ULONGEST
*xfered_len
)
10968 struct remote_state
*rs
;
10972 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10974 set_remote_traceframe ();
10975 set_general_thread (inferior_ptid
);
10977 rs
= get_remote_state ();
10979 /* Handle memory using the standard memory routines. */
10980 if (object
== TARGET_OBJECT_MEMORY
)
10982 /* If the remote target is connected but not running, we should
10983 pass this request down to a lower stratum (e.g. the executable
10985 if (!target_has_execution ())
10986 return TARGET_XFER_EOF
;
10988 if (writebuf
!= NULL
)
10989 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10992 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
10996 /* Handle extra signal info using qxfer packets. */
10997 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
11000 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
11001 xfered_len
, &remote_protocol_packets
11002 [PACKET_qXfer_siginfo_read
]);
11004 return remote_write_qxfer ("siginfo", annex
,
11005 writebuf
, offset
, len
, xfered_len
,
11006 &remote_protocol_packets
11007 [PACKET_qXfer_siginfo_write
]);
11010 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
11013 return remote_read_qxfer ("statictrace", annex
,
11014 readbuf
, offset
, len
, xfered_len
,
11015 &remote_protocol_packets
11016 [PACKET_qXfer_statictrace_read
]);
11018 return TARGET_XFER_E_IO
;
11021 /* Only handle flash writes. */
11022 if (writebuf
!= NULL
)
11026 case TARGET_OBJECT_FLASH
:
11027 return remote_flash_write (offset
, len
, xfered_len
,
11031 return TARGET_XFER_E_IO
;
11035 /* Map pre-existing objects onto letters. DO NOT do this for new
11036 objects!!! Instead specify new query packets. */
11039 case TARGET_OBJECT_AVR
:
11043 case TARGET_OBJECT_AUXV
:
11044 gdb_assert (annex
== NULL
);
11045 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
11047 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
11049 case TARGET_OBJECT_AVAILABLE_FEATURES
:
11050 return remote_read_qxfer
11051 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
11052 &remote_protocol_packets
[PACKET_qXfer_features
]);
11054 case TARGET_OBJECT_LIBRARIES
:
11055 return remote_read_qxfer
11056 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
11057 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
11059 case TARGET_OBJECT_LIBRARIES_SVR4
:
11060 return remote_read_qxfer
11061 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
11062 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
11064 case TARGET_OBJECT_MEMORY_MAP
:
11065 gdb_assert (annex
== NULL
);
11066 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
11068 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
11070 case TARGET_OBJECT_OSDATA
:
11071 /* Should only get here if we're connected. */
11072 gdb_assert (rs
->remote_desc
);
11073 return remote_read_qxfer
11074 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
11075 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
11077 case TARGET_OBJECT_THREADS
:
11078 gdb_assert (annex
== NULL
);
11079 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
11081 &remote_protocol_packets
[PACKET_qXfer_threads
]);
11083 case TARGET_OBJECT_TRACEFRAME_INFO
:
11084 gdb_assert (annex
== NULL
);
11085 return remote_read_qxfer
11086 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11087 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11089 case TARGET_OBJECT_FDPIC
:
11090 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11092 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11094 case TARGET_OBJECT_OPENVMS_UIB
:
11095 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11097 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11099 case TARGET_OBJECT_BTRACE
:
11100 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11102 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11104 case TARGET_OBJECT_BTRACE_CONF
:
11105 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11107 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11109 case TARGET_OBJECT_EXEC_FILE
:
11110 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11112 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11115 return TARGET_XFER_E_IO
;
11118 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11119 large enough let the caller deal with it. */
11120 if (len
< get_remote_packet_size ())
11121 return TARGET_XFER_E_IO
;
11122 len
= get_remote_packet_size ();
11124 /* Except for querying the minimum buffer size, target must be open. */
11125 if (!rs
->remote_desc
)
11126 error (_("remote query is only available after target open"));
11128 gdb_assert (annex
!= NULL
);
11129 gdb_assert (readbuf
!= NULL
);
11131 p2
= rs
->buf
.data ();
11133 *p2
++ = query_type
;
11135 /* We used one buffer char for the remote protocol q command and
11136 another for the query type. As the remote protocol encapsulation
11137 uses 4 chars plus one extra in case we are debugging
11138 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11141 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11143 /* Bad caller may have sent forbidden characters. */
11144 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11149 gdb_assert (annex
[i
] == '\0');
11151 i
= putpkt (rs
->buf
);
11153 return TARGET_XFER_E_IO
;
11155 getpkt (&rs
->buf
, 0);
11156 strcpy ((char *) readbuf
, rs
->buf
.data ());
11158 *xfered_len
= strlen ((char *) readbuf
);
11159 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11162 /* Implementation of to_get_memory_xfer_limit. */
11165 remote_target::get_memory_xfer_limit ()
11167 return get_memory_write_packet_size ();
11171 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11172 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11173 CORE_ADDR
*found_addrp
)
11175 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11176 struct remote_state
*rs
= get_remote_state ();
11177 int max_size
= get_memory_write_packet_size ();
11178 struct packet_config
*packet
=
11179 &remote_protocol_packets
[PACKET_qSearch_memory
];
11180 /* Number of packet bytes used to encode the pattern;
11181 this could be more than PATTERN_LEN due to escape characters. */
11182 int escaped_pattern_len
;
11183 /* Amount of pattern that was encodable in the packet. */
11184 int used_pattern_len
;
11187 ULONGEST found_addr
;
11189 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
11191 return (target_read (this, TARGET_OBJECT_MEMORY
, NULL
, result
, addr
, len
)
11195 /* Don't go to the target if we don't have to. This is done before
11196 checking packet_config_support to avoid the possibility that a
11197 success for this edge case means the facility works in
11199 if (pattern_len
> search_space_len
)
11201 if (pattern_len
== 0)
11203 *found_addrp
= start_addr
;
11207 /* If we already know the packet isn't supported, fall back to the simple
11208 way of searching memory. */
11210 if (packet_config_support (packet
) == PACKET_DISABLE
)
11212 /* Target doesn't provided special support, fall back and use the
11213 standard support (copy memory and do the search here). */
11214 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11215 pattern
, pattern_len
, found_addrp
);
11218 /* Make sure the remote is pointing at the right process. */
11219 set_general_process ();
11221 /* Insert header. */
11222 i
= snprintf (rs
->buf
.data (), max_size
,
11223 "qSearch:memory:%s;%s;",
11224 phex_nz (start_addr
, addr_size
),
11225 phex_nz (search_space_len
, sizeof (search_space_len
)));
11226 max_size
-= (i
+ 1);
11228 /* Escape as much data as fits into rs->buf. */
11229 escaped_pattern_len
=
11230 remote_escape_output (pattern
, pattern_len
, 1,
11231 (gdb_byte
*) rs
->buf
.data () + i
,
11232 &used_pattern_len
, max_size
);
11234 /* Bail if the pattern is too large. */
11235 if (used_pattern_len
!= pattern_len
)
11236 error (_("Pattern is too large to transmit to remote target."));
11238 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11239 || getpkt_sane (&rs
->buf
, 0) < 0
11240 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11242 /* The request may not have worked because the command is not
11243 supported. If so, fall back to the simple way. */
11244 if (packet_config_support (packet
) == PACKET_DISABLE
)
11246 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11247 pattern
, pattern_len
, found_addrp
);
11252 if (rs
->buf
[0] == '0')
11254 else if (rs
->buf
[0] == '1')
11257 if (rs
->buf
[1] != ',')
11258 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11259 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11260 *found_addrp
= found_addr
;
11263 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11269 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11271 struct remote_state
*rs
= get_remote_state ();
11272 char *p
= rs
->buf
.data ();
11274 if (!rs
->remote_desc
)
11275 error (_("remote rcmd is only available after target open"));
11277 /* Send a NULL command across as an empty command. */
11278 if (command
== NULL
)
11281 /* The query prefix. */
11282 strcpy (rs
->buf
.data (), "qRcmd,");
11283 p
= strchr (rs
->buf
.data (), '\0');
11285 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11286 > get_remote_packet_size ())
11287 error (_("\"monitor\" command ``%s'' is too long."), command
);
11289 /* Encode the actual command. */
11290 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11292 if (putpkt (rs
->buf
) < 0)
11293 error (_("Communication problem with target."));
11295 /* get/display the response */
11300 /* XXX - see also remote_get_noisy_reply(). */
11301 QUIT
; /* Allow user to bail out with ^C. */
11303 if (getpkt_sane (&rs
->buf
, 0) == -1)
11305 /* Timeout. Continue to (try to) read responses.
11306 This is better than stopping with an error, assuming the stub
11307 is still executing the (long) monitor command.
11308 If needed, the user can interrupt gdb using C-c, obtaining
11309 an effect similar to stop on timeout. */
11312 buf
= rs
->buf
.data ();
11313 if (buf
[0] == '\0')
11314 error (_("Target does not support this command."));
11315 if (buf
[0] == 'O' && buf
[1] != 'K')
11317 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11320 if (strcmp (buf
, "OK") == 0)
11322 if (strlen (buf
) == 3 && buf
[0] == 'E'
11323 && isdigit (buf
[1]) && isdigit (buf
[2]))
11325 error (_("Protocol error with Rcmd"));
11327 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11329 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11331 fputc_unfiltered (c
, outbuf
);
11337 std::vector
<mem_region
>
11338 remote_target::memory_map ()
11340 std::vector
<mem_region
> result
;
11341 gdb::optional
<gdb::char_vector
> text
11342 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP
, NULL
);
11345 result
= parse_memory_map (text
->data ());
11351 packet_command (const char *args
, int from_tty
)
11353 remote_target
*remote
= get_current_remote_target ();
11355 if (remote
== nullptr)
11356 error (_("command can only be used with remote target"));
11358 remote
->packet_command (args
, from_tty
);
11362 remote_target::packet_command (const char *args
, int from_tty
)
11365 error (_("remote-packet command requires packet text as argument"));
11367 puts_filtered ("sending: ");
11368 print_packet (args
);
11369 puts_filtered ("\n");
11372 remote_state
*rs
= get_remote_state ();
11374 getpkt (&rs
->buf
, 0);
11375 puts_filtered ("received: ");
11376 print_packet (rs
->buf
.data ());
11377 puts_filtered ("\n");
11381 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11383 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11385 static void threadset_test_cmd (char *cmd
, int tty
);
11387 static void threadalive_test (char *cmd
, int tty
);
11389 static void threadlist_test_cmd (char *cmd
, int tty
);
11391 int get_and_display_threadinfo (threadref
*ref
);
11393 static void threadinfo_test_cmd (char *cmd
, int tty
);
11395 static int thread_display_step (threadref
*ref
, void *context
);
11397 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11399 static void init_remote_threadtests (void);
11401 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11404 threadset_test_cmd (const char *cmd
, int tty
)
11406 int sample_thread
= SAMPLE_THREAD
;
11408 printf_filtered (_("Remote threadset test\n"));
11409 set_general_thread (sample_thread
);
11414 threadalive_test (const char *cmd
, int tty
)
11416 int sample_thread
= SAMPLE_THREAD
;
11417 int pid
= inferior_ptid
.pid ();
11418 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11420 if (remote_thread_alive (ptid
))
11421 printf_filtered ("PASS: Thread alive test\n");
11423 printf_filtered ("FAIL: Thread alive test\n");
11426 void output_threadid (char *title
, threadref
*ref
);
11429 output_threadid (char *title
, threadref
*ref
)
11433 pack_threadid (&hexid
[0], ref
); /* Convert thread id into hex. */
11435 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11439 threadlist_test_cmd (const char *cmd
, int tty
)
11442 threadref nextthread
;
11443 int done
, result_count
;
11444 threadref threadlist
[3];
11446 printf_filtered ("Remote Threadlist test\n");
11447 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11448 &result_count
, &threadlist
[0]))
11449 printf_filtered ("FAIL: threadlist test\n");
11452 threadref
*scan
= threadlist
;
11453 threadref
*limit
= scan
+ result_count
;
11455 while (scan
< limit
)
11456 output_threadid (" thread ", scan
++);
11461 display_thread_info (struct gdb_ext_thread_info
*info
)
11463 output_threadid ("Threadid: ", &info
->threadid
);
11464 printf_filtered ("Name: %s\n ", info
->shortname
);
11465 printf_filtered ("State: %s\n", info
->display
);
11466 printf_filtered ("other: %s\n\n", info
->more_display
);
11470 get_and_display_threadinfo (threadref
*ref
)
11474 struct gdb_ext_thread_info threadinfo
;
11476 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11477 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11478 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11479 display_thread_info (&threadinfo
);
11484 threadinfo_test_cmd (const char *cmd
, int tty
)
11486 int athread
= SAMPLE_THREAD
;
11490 int_to_threadref (&thread
, athread
);
11491 printf_filtered ("Remote Threadinfo test\n");
11492 if (!get_and_display_threadinfo (&thread
))
11493 printf_filtered ("FAIL cannot get thread info\n");
11497 thread_display_step (threadref
*ref
, void *context
)
11499 /* output_threadid(" threadstep ",ref); *//* simple test */
11500 return get_and_display_threadinfo (ref
);
11504 threadlist_update_test_cmd (const char *cmd
, int tty
)
11506 printf_filtered ("Remote Threadlist update test\n");
11507 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11511 init_remote_threadtests (void)
11513 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11514 _("Fetch and print the remote list of "
11515 "thread identifiers, one pkt only."));
11516 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11517 _("Fetch and display info about one thread."));
11518 add_com ("tset", class_obscure
, threadset_test_cmd
,
11519 _("Test setting to a different thread."));
11520 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11521 _("Iterate through updating all remote thread info."));
11522 add_com ("talive", class_obscure
, threadalive_test
,
11523 _("Remote thread alive test."));
11528 /* Convert a thread ID to a string. */
11531 remote_target::pid_to_str (ptid_t ptid
)
11533 struct remote_state
*rs
= get_remote_state ();
11535 if (ptid
== null_ptid
)
11536 return normal_pid_to_str (ptid
);
11537 else if (ptid
.is_pid ())
11539 /* Printing an inferior target id. */
11541 /* When multi-process extensions are off, there's no way in the
11542 remote protocol to know the remote process id, if there's any
11543 at all. There's one exception --- when we're connected with
11544 target extended-remote, and we manually attached to a process
11545 with "attach PID". We don't record anywhere a flag that
11546 allows us to distinguish that case from the case of
11547 connecting with extended-remote and the stub already being
11548 attached to a process, and reporting yes to qAttached, hence
11549 no smart special casing here. */
11550 if (!remote_multi_process_p (rs
))
11551 return "Remote target";
11553 return normal_pid_to_str (ptid
);
11557 if (magic_null_ptid
== ptid
)
11558 return "Thread <main>";
11559 else if (remote_multi_process_p (rs
))
11560 if (ptid
.lwp () == 0)
11561 return normal_pid_to_str (ptid
);
11563 return string_printf ("Thread %d.%ld",
11564 ptid
.pid (), ptid
.lwp ());
11566 return string_printf ("Thread %ld", ptid
.lwp ());
11570 /* Get the address of the thread local variable in OBJFILE which is
11571 stored at OFFSET within the thread local storage for thread PTID. */
11574 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11577 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11579 struct remote_state
*rs
= get_remote_state ();
11580 char *p
= rs
->buf
.data ();
11581 char *endp
= p
+ get_remote_packet_size ();
11582 enum packet_result result
;
11584 strcpy (p
, "qGetTLSAddr:");
11586 p
= write_ptid (p
, endp
, ptid
);
11588 p
+= hexnumstr (p
, offset
);
11590 p
+= hexnumstr (p
, lm
);
11594 getpkt (&rs
->buf
, 0);
11595 result
= packet_ok (rs
->buf
,
11596 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11597 if (result
== PACKET_OK
)
11601 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11604 else if (result
== PACKET_UNKNOWN
)
11605 throw_error (TLS_GENERIC_ERROR
,
11606 _("Remote target doesn't support qGetTLSAddr packet"));
11608 throw_error (TLS_GENERIC_ERROR
,
11609 _("Remote target failed to process qGetTLSAddr request"));
11612 throw_error (TLS_GENERIC_ERROR
,
11613 _("TLS not supported or disabled on this target"));
11618 /* Provide thread local base, i.e. Thread Information Block address.
11619 Returns 1 if ptid is found and thread_local_base is non zero. */
11622 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11624 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11626 struct remote_state
*rs
= get_remote_state ();
11627 char *p
= rs
->buf
.data ();
11628 char *endp
= p
+ get_remote_packet_size ();
11629 enum packet_result result
;
11631 strcpy (p
, "qGetTIBAddr:");
11633 p
= write_ptid (p
, endp
, ptid
);
11637 getpkt (&rs
->buf
, 0);
11638 result
= packet_ok (rs
->buf
,
11639 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11640 if (result
== PACKET_OK
)
11643 unpack_varlen_hex (rs
->buf
.data (), &val
);
11645 *addr
= (CORE_ADDR
) val
;
11648 else if (result
== PACKET_UNKNOWN
)
11649 error (_("Remote target doesn't support qGetTIBAddr packet"));
11651 error (_("Remote target failed to process qGetTIBAddr request"));
11654 error (_("qGetTIBAddr not supported or disabled on this target"));
11659 /* Support for inferring a target description based on the current
11660 architecture and the size of a 'g' packet. While the 'g' packet
11661 can have any size (since optional registers can be left off the
11662 end), some sizes are easily recognizable given knowledge of the
11663 approximate architecture. */
11665 struct remote_g_packet_guess
11667 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11674 const struct target_desc
*tdesc
;
11677 struct remote_g_packet_data
: public allocate_on_obstack
11679 std::vector
<remote_g_packet_guess
> guesses
;
11682 static struct gdbarch_data
*remote_g_packet_data_handle
;
11685 remote_g_packet_data_init (struct obstack
*obstack
)
11687 return new (obstack
) remote_g_packet_data
;
11691 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11692 const struct target_desc
*tdesc
)
11694 struct remote_g_packet_data
*data
11695 = ((struct remote_g_packet_data
*)
11696 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11698 gdb_assert (tdesc
!= NULL
);
11700 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11701 if (guess
.bytes
== bytes
)
11702 internal_error (__FILE__
, __LINE__
,
11703 _("Duplicate g packet description added for size %d"),
11706 data
->guesses
.emplace_back (bytes
, tdesc
);
11709 /* Return true if remote_read_description would do anything on this target
11710 and architecture, false otherwise. */
11713 remote_read_description_p (struct target_ops
*target
)
11715 struct remote_g_packet_data
*data
11716 = ((struct remote_g_packet_data
*)
11717 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11719 return !data
->guesses
.empty ();
11722 const struct target_desc
*
11723 remote_target::read_description ()
11725 struct remote_g_packet_data
*data
11726 = ((struct remote_g_packet_data
*)
11727 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11729 /* Do not try this during initial connection, when we do not know
11730 whether there is a running but stopped thread. */
11731 if (!target_has_execution () || inferior_ptid
== null_ptid
)
11732 return beneath ()->read_description ();
11734 if (!data
->guesses
.empty ())
11736 int bytes
= send_g_packet ();
11738 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11739 if (guess
.bytes
== bytes
)
11740 return guess
.tdesc
;
11742 /* We discard the g packet. A minor optimization would be to
11743 hold on to it, and fill the register cache once we have selected
11744 an architecture, but it's too tricky to do safely. */
11747 return beneath ()->read_description ();
11750 /* Remote file transfer support. This is host-initiated I/O, not
11751 target-initiated; for target-initiated, see remote-fileio.c. */
11753 /* If *LEFT is at least the length of STRING, copy STRING to
11754 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11755 decrease *LEFT. Otherwise raise an error. */
11758 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11760 int len
= strlen (string
);
11763 error (_("Packet too long for target."));
11765 memcpy (*buffer
, string
, len
);
11769 /* NUL-terminate the buffer as a convenience, if there is
11775 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11776 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11777 decrease *LEFT. Otherwise raise an error. */
11780 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11783 if (2 * len
> *left
)
11784 error (_("Packet too long for target."));
11786 bin2hex (bytes
, *buffer
, len
);
11787 *buffer
+= 2 * len
;
11790 /* NUL-terminate the buffer as a convenience, if there is
11796 /* If *LEFT is large enough, convert VALUE to hex and add it to
11797 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11798 decrease *LEFT. Otherwise raise an error. */
11801 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11803 int len
= hexnumlen (value
);
11806 error (_("Packet too long for target."));
11808 hexnumstr (*buffer
, value
);
11812 /* NUL-terminate the buffer as a convenience, if there is
11818 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11819 value, *REMOTE_ERRNO to the remote error number or zero if none
11820 was included, and *ATTACHMENT to point to the start of the annex
11821 if any. The length of the packet isn't needed here; there may
11822 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11824 Return 0 if the packet could be parsed, -1 if it could not. If
11825 -1 is returned, the other variables may not be initialized. */
11828 remote_hostio_parse_result (char *buffer
, int *retcode
,
11829 int *remote_errno
, char **attachment
)
11834 *attachment
= NULL
;
11836 if (buffer
[0] != 'F')
11840 *retcode
= strtol (&buffer
[1], &p
, 16);
11841 if (errno
!= 0 || p
== &buffer
[1])
11844 /* Check for ",errno". */
11848 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11849 if (errno
!= 0 || p
+ 1 == p2
)
11854 /* Check for ";attachment". If there is no attachment, the
11855 packet should end here. */
11858 *attachment
= p
+ 1;
11861 else if (*p
== '\0')
11867 /* Send a prepared I/O packet to the target and read its response.
11868 The prepared packet is in the global RS->BUF before this function
11869 is called, and the answer is there when we return.
11871 COMMAND_BYTES is the length of the request to send, which may include
11872 binary data. WHICH_PACKET is the packet configuration to check
11873 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11874 is set to the error number and -1 is returned. Otherwise the value
11875 returned by the function is returned.
11877 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11878 attachment is expected; an error will be reported if there's a
11879 mismatch. If one is found, *ATTACHMENT will be set to point into
11880 the packet buffer and *ATTACHMENT_LEN will be set to the
11881 attachment's length. */
11884 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
11885 int *remote_errno
, char **attachment
,
11886 int *attachment_len
)
11888 struct remote_state
*rs
= get_remote_state ();
11889 int ret
, bytes_read
;
11890 char *attachment_tmp
;
11892 if (packet_support (which_packet
) == PACKET_DISABLE
)
11894 *remote_errno
= FILEIO_ENOSYS
;
11898 putpkt_binary (rs
->buf
.data (), command_bytes
);
11899 bytes_read
= getpkt_sane (&rs
->buf
, 0);
11901 /* If it timed out, something is wrong. Don't try to parse the
11903 if (bytes_read
< 0)
11905 *remote_errno
= FILEIO_EINVAL
;
11909 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11912 *remote_errno
= FILEIO_EINVAL
;
11914 case PACKET_UNKNOWN
:
11915 *remote_errno
= FILEIO_ENOSYS
;
11921 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
11924 *remote_errno
= FILEIO_EINVAL
;
11928 /* Make sure we saw an attachment if and only if we expected one. */
11929 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11930 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11932 *remote_errno
= FILEIO_EINVAL
;
11936 /* If an attachment was found, it must point into the packet buffer;
11937 work out how many bytes there were. */
11938 if (attachment_tmp
!= NULL
)
11940 *attachment
= attachment_tmp
;
11941 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
11947 /* See declaration.h. */
11950 readahead_cache::invalidate ()
11955 /* See declaration.h. */
11958 readahead_cache::invalidate_fd (int fd
)
11960 if (this->fd
== fd
)
11964 /* Set the filesystem remote_hostio functions that take FILENAME
11965 arguments will use. Return 0 on success, or -1 if an error
11966 occurs (and set *REMOTE_ERRNO). */
11969 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
11972 struct remote_state
*rs
= get_remote_state ();
11973 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11974 char *p
= rs
->buf
.data ();
11975 int left
= get_remote_packet_size () - 1;
11979 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11982 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11985 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11987 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11988 remote_buffer_add_string (&p
, &left
, arg
);
11990 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
11991 remote_errno
, NULL
, NULL
);
11993 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11997 rs
->fs_pid
= required_pid
;
12002 /* Implementation of to_fileio_open. */
12005 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
12006 int flags
, int mode
, int warn_if_slow
,
12009 struct remote_state
*rs
= get_remote_state ();
12010 char *p
= rs
->buf
.data ();
12011 int left
= get_remote_packet_size () - 1;
12015 static int warning_issued
= 0;
12017 printf_unfiltered (_("Reading %s from remote target...\n"),
12020 if (!warning_issued
)
12022 warning (_("File transfers from remote targets can be slow."
12023 " Use \"set sysroot\" to access files locally"
12025 warning_issued
= 1;
12029 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12032 remote_buffer_add_string (&p
, &left
, "vFile:open:");
12034 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12035 strlen (filename
));
12036 remote_buffer_add_string (&p
, &left
, ",");
12038 remote_buffer_add_int (&p
, &left
, flags
);
12039 remote_buffer_add_string (&p
, &left
, ",");
12041 remote_buffer_add_int (&p
, &left
, mode
);
12043 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
12044 remote_errno
, NULL
, NULL
);
12048 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
12049 int flags
, int mode
, int warn_if_slow
,
12052 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
12056 /* Implementation of to_fileio_pwrite. */
12059 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12060 ULONGEST offset
, int *remote_errno
)
12062 struct remote_state
*rs
= get_remote_state ();
12063 char *p
= rs
->buf
.data ();
12064 int left
= get_remote_packet_size ();
12067 rs
->readahead_cache
.invalidate_fd (fd
);
12069 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
12071 remote_buffer_add_int (&p
, &left
, fd
);
12072 remote_buffer_add_string (&p
, &left
, ",");
12074 remote_buffer_add_int (&p
, &left
, offset
);
12075 remote_buffer_add_string (&p
, &left
, ",");
12077 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
12078 (get_remote_packet_size ()
12079 - (p
- rs
->buf
.data ())));
12081 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
12082 remote_errno
, NULL
, NULL
);
12086 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12087 ULONGEST offset
, int *remote_errno
)
12089 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12092 /* Helper for the implementation of to_fileio_pread. Read the file
12093 from the remote side with vFile:pread. */
12096 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12097 ULONGEST offset
, int *remote_errno
)
12099 struct remote_state
*rs
= get_remote_state ();
12100 char *p
= rs
->buf
.data ();
12102 int left
= get_remote_packet_size ();
12103 int ret
, attachment_len
;
12106 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12108 remote_buffer_add_int (&p
, &left
, fd
);
12109 remote_buffer_add_string (&p
, &left
, ",");
12111 remote_buffer_add_int (&p
, &left
, len
);
12112 remote_buffer_add_string (&p
, &left
, ",");
12114 remote_buffer_add_int (&p
, &left
, offset
);
12116 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
12117 remote_errno
, &attachment
,
12123 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12125 if (read_len
!= ret
)
12126 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12131 /* See declaration.h. */
12134 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12138 && this->offset
<= offset
12139 && offset
< this->offset
+ this->bufsize
)
12141 ULONGEST max
= this->offset
+ this->bufsize
;
12143 if (offset
+ len
> max
)
12144 len
= max
- offset
;
12146 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12153 /* Implementation of to_fileio_pread. */
12156 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12157 ULONGEST offset
, int *remote_errno
)
12160 struct remote_state
*rs
= get_remote_state ();
12161 readahead_cache
*cache
= &rs
->readahead_cache
;
12163 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12166 cache
->hit_count
++;
12169 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
12170 pulongest (cache
->hit_count
));
12174 cache
->miss_count
++;
12176 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
12177 pulongest (cache
->miss_count
));
12180 cache
->offset
= offset
;
12181 cache
->bufsize
= get_remote_packet_size ();
12182 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12184 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12185 cache
->offset
, remote_errno
);
12188 cache
->invalidate_fd (fd
);
12192 cache
->bufsize
= ret
;
12193 return cache
->pread (fd
, read_buf
, len
, offset
);
12197 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12198 ULONGEST offset
, int *remote_errno
)
12200 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12203 /* Implementation of to_fileio_close. */
12206 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12208 struct remote_state
*rs
= get_remote_state ();
12209 char *p
= rs
->buf
.data ();
12210 int left
= get_remote_packet_size () - 1;
12212 rs
->readahead_cache
.invalidate_fd (fd
);
12214 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12216 remote_buffer_add_int (&p
, &left
, fd
);
12218 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12219 remote_errno
, NULL
, NULL
);
12223 remote_target::fileio_close (int fd
, int *remote_errno
)
12225 return remote_hostio_close (fd
, remote_errno
);
12228 /* Implementation of to_fileio_unlink. */
12231 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12234 struct remote_state
*rs
= get_remote_state ();
12235 char *p
= rs
->buf
.data ();
12236 int left
= get_remote_packet_size () - 1;
12238 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12241 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12243 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12244 strlen (filename
));
12246 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12247 remote_errno
, NULL
, NULL
);
12251 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12254 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12257 /* Implementation of to_fileio_readlink. */
12259 gdb::optional
<std::string
>
12260 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12263 struct remote_state
*rs
= get_remote_state ();
12264 char *p
= rs
->buf
.data ();
12266 int left
= get_remote_packet_size ();
12267 int len
, attachment_len
;
12270 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12273 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12275 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12276 strlen (filename
));
12278 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12279 remote_errno
, &attachment
,
12285 std::string
ret (len
, '\0');
12287 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12288 (gdb_byte
*) &ret
[0], len
);
12289 if (read_len
!= len
)
12290 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12295 /* Implementation of to_fileio_fstat. */
12298 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12300 struct remote_state
*rs
= get_remote_state ();
12301 char *p
= rs
->buf
.data ();
12302 int left
= get_remote_packet_size ();
12303 int attachment_len
, ret
;
12305 struct fio_stat fst
;
12308 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12310 remote_buffer_add_int (&p
, &left
, fd
);
12312 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12313 remote_errno
, &attachment
,
12317 if (*remote_errno
!= FILEIO_ENOSYS
)
12320 /* Strictly we should return -1, ENOSYS here, but when
12321 "set sysroot remote:" was implemented in August 2008
12322 BFD's need for a stat function was sidestepped with
12323 this hack. This was not remedied until March 2015
12324 so we retain the previous behavior to avoid breaking
12327 Note that the memset is a March 2015 addition; older
12328 GDBs set st_size *and nothing else* so the structure
12329 would have garbage in all other fields. This might
12330 break something but retaining the previous behavior
12331 here would be just too wrong. */
12333 memset (st
, 0, sizeof (struct stat
));
12334 st
->st_size
= INT_MAX
;
12338 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12339 (gdb_byte
*) &fst
, sizeof (fst
));
12341 if (read_len
!= ret
)
12342 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12344 if (read_len
!= sizeof (fst
))
12345 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12346 read_len
, (int) sizeof (fst
));
12348 remote_fileio_to_host_stat (&fst
, st
);
12353 /* Implementation of to_filesystem_is_local. */
12356 remote_target::filesystem_is_local ()
12358 /* Valgrind GDB presents itself as a remote target but works
12359 on the local filesystem: it does not implement remote get
12360 and users are not expected to set a sysroot. To handle
12361 this case we treat the remote filesystem as local if the
12362 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12363 does not support vFile:open. */
12364 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12366 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12368 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12370 int fd
, remote_errno
;
12372 /* Try opening a file to probe support. The supplied
12373 filename is irrelevant, we only care about whether
12374 the stub recognizes the packet or not. */
12375 fd
= remote_hostio_open (NULL
, "just probing",
12376 FILEIO_O_RDONLY
, 0700, 0,
12380 remote_hostio_close (fd
, &remote_errno
);
12382 ps
= packet_support (PACKET_vFile_open
);
12385 if (ps
== PACKET_DISABLE
)
12387 static int warning_issued
= 0;
12389 if (!warning_issued
)
12391 warning (_("remote target does not support file"
12392 " transfer, attempting to access files"
12393 " from local filesystem."));
12394 warning_issued
= 1;
12405 remote_fileio_errno_to_host (int errnum
)
12411 case FILEIO_ENOENT
:
12419 case FILEIO_EACCES
:
12421 case FILEIO_EFAULT
:
12425 case FILEIO_EEXIST
:
12427 case FILEIO_ENODEV
:
12429 case FILEIO_ENOTDIR
:
12431 case FILEIO_EISDIR
:
12433 case FILEIO_EINVAL
:
12435 case FILEIO_ENFILE
:
12437 case FILEIO_EMFILE
:
12441 case FILEIO_ENOSPC
:
12443 case FILEIO_ESPIPE
:
12447 case FILEIO_ENOSYS
:
12449 case FILEIO_ENAMETOOLONG
:
12450 return ENAMETOOLONG
;
12456 remote_hostio_error (int errnum
)
12458 int host_error
= remote_fileio_errno_to_host (errnum
);
12460 if (host_error
== -1)
12461 error (_("Unknown remote I/O error %d"), errnum
);
12463 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12466 /* A RAII wrapper around a remote file descriptor. */
12468 class scoped_remote_fd
12471 scoped_remote_fd (remote_target
*remote
, int fd
)
12472 : m_remote (remote
), m_fd (fd
)
12476 ~scoped_remote_fd ()
12483 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12487 /* Swallow exception before it escapes the dtor. If
12488 something goes wrong, likely the connection is gone,
12489 and there's nothing else that can be done. */
12494 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12496 /* Release ownership of the file descriptor, and return it. */
12497 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12504 /* Return the owned file descriptor. */
12505 int get () const noexcept
12511 /* The remote target. */
12512 remote_target
*m_remote
;
12514 /* The owned remote I/O file descriptor. */
12519 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12521 remote_target
*remote
= get_current_remote_target ();
12523 if (remote
== nullptr)
12524 error (_("command can only be used with remote target"));
12526 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12530 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12533 int retcode
, remote_errno
, bytes
, io_size
;
12534 int bytes_in_buffer
;
12538 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12540 perror_with_name (local_file
);
12542 scoped_remote_fd fd
12543 (this, remote_hostio_open (NULL
,
12544 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12546 0700, 0, &remote_errno
));
12547 if (fd
.get () == -1)
12548 remote_hostio_error (remote_errno
);
12550 /* Send up to this many bytes at once. They won't all fit in the
12551 remote packet limit, so we'll transfer slightly fewer. */
12552 io_size
= get_remote_packet_size ();
12553 gdb::byte_vector
buffer (io_size
);
12555 bytes_in_buffer
= 0;
12558 while (bytes_in_buffer
|| !saw_eof
)
12562 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12563 io_size
- bytes_in_buffer
,
12567 if (ferror (file
.get ()))
12568 error (_("Error reading %s."), local_file
);
12571 /* EOF. Unless there is something still in the
12572 buffer from the last iteration, we are done. */
12574 if (bytes_in_buffer
== 0)
12582 bytes
+= bytes_in_buffer
;
12583 bytes_in_buffer
= 0;
12585 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12586 offset
, &remote_errno
);
12589 remote_hostio_error (remote_errno
);
12590 else if (retcode
== 0)
12591 error (_("Remote write of %d bytes returned 0!"), bytes
);
12592 else if (retcode
< bytes
)
12594 /* Short write. Save the rest of the read data for the next
12596 bytes_in_buffer
= bytes
- retcode
;
12597 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12603 if (remote_hostio_close (fd
.release (), &remote_errno
))
12604 remote_hostio_error (remote_errno
);
12607 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12611 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12613 remote_target
*remote
= get_current_remote_target ();
12615 if (remote
== nullptr)
12616 error (_("command can only be used with remote target"));
12618 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12622 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12625 int remote_errno
, bytes
, io_size
;
12628 scoped_remote_fd fd
12629 (this, remote_hostio_open (NULL
,
12630 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12632 if (fd
.get () == -1)
12633 remote_hostio_error (remote_errno
);
12635 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12637 perror_with_name (local_file
);
12639 /* Send up to this many bytes at once. They won't all fit in the
12640 remote packet limit, so we'll transfer slightly fewer. */
12641 io_size
= get_remote_packet_size ();
12642 gdb::byte_vector
buffer (io_size
);
12647 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12650 /* Success, but no bytes, means end-of-file. */
12653 remote_hostio_error (remote_errno
);
12657 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12659 perror_with_name (local_file
);
12662 if (remote_hostio_close (fd
.release (), &remote_errno
))
12663 remote_hostio_error (remote_errno
);
12666 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12670 remote_file_delete (const char *remote_file
, int from_tty
)
12672 remote_target
*remote
= get_current_remote_target ();
12674 if (remote
== nullptr)
12675 error (_("command can only be used with remote target"));
12677 remote
->remote_file_delete (remote_file
, from_tty
);
12681 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12683 int retcode
, remote_errno
;
12685 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12687 remote_hostio_error (remote_errno
);
12690 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12694 remote_put_command (const char *args
, int from_tty
)
12697 error_no_arg (_("file to put"));
12699 gdb_argv
argv (args
);
12700 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12701 error (_("Invalid parameters to remote put"));
12703 remote_file_put (argv
[0], argv
[1], from_tty
);
12707 remote_get_command (const char *args
, int from_tty
)
12710 error_no_arg (_("file to get"));
12712 gdb_argv
argv (args
);
12713 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12714 error (_("Invalid parameters to remote get"));
12716 remote_file_get (argv
[0], argv
[1], from_tty
);
12720 remote_delete_command (const char *args
, int from_tty
)
12723 error_no_arg (_("file to delete"));
12725 gdb_argv
argv (args
);
12726 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12727 error (_("Invalid parameters to remote delete"));
12729 remote_file_delete (argv
[0], from_tty
);
12733 remote_target::can_execute_reverse ()
12735 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12736 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12743 remote_target::supports_non_stop ()
12749 remote_target::supports_disable_randomization ()
12751 /* Only supported in extended mode. */
12756 remote_target::supports_multi_process ()
12758 struct remote_state
*rs
= get_remote_state ();
12760 return remote_multi_process_p (rs
);
12764 remote_supports_cond_tracepoints ()
12766 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12770 remote_target::supports_evaluation_of_breakpoint_conditions ()
12772 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12776 remote_supports_fast_tracepoints ()
12778 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12782 remote_supports_static_tracepoints ()
12784 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12788 remote_supports_install_in_trace ()
12790 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12794 remote_target::supports_enable_disable_tracepoint ()
12796 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12801 remote_target::supports_string_tracing ()
12803 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12807 remote_target::can_run_breakpoint_commands ()
12809 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12813 remote_target::trace_init ()
12815 struct remote_state
*rs
= get_remote_state ();
12818 remote_get_noisy_reply ();
12819 if (strcmp (rs
->buf
.data (), "OK") != 0)
12820 error (_("Target does not support this command."));
12823 /* Recursive routine to walk through command list including loops, and
12824 download packets for each command. */
12827 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
12828 struct command_line
*cmds
)
12830 struct remote_state
*rs
= get_remote_state ();
12831 struct command_line
*cmd
;
12833 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12835 QUIT
; /* Allow user to bail out with ^C. */
12836 strcpy (rs
->buf
.data (), "QTDPsrc:");
12837 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12838 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12839 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12841 remote_get_noisy_reply ();
12842 if (strcmp (rs
->buf
.data (), "OK"))
12843 warning (_("Target does not support source download."));
12845 if (cmd
->control_type
== while_control
12846 || cmd
->control_type
== while_stepping_control
)
12848 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
12850 QUIT
; /* Allow user to bail out with ^C. */
12851 strcpy (rs
->buf
.data (), "QTDPsrc:");
12852 encode_source_string (num
, addr
, "cmd", "end",
12853 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12854 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12856 remote_get_noisy_reply ();
12857 if (strcmp (rs
->buf
.data (), "OK"))
12858 warning (_("Target does not support source download."));
12864 remote_target::download_tracepoint (struct bp_location
*loc
)
12868 std::vector
<std::string
> tdp_actions
;
12869 std::vector
<std::string
> stepping_actions
;
12871 struct breakpoint
*b
= loc
->owner
;
12872 struct tracepoint
*t
= (struct tracepoint
*) b
;
12873 struct remote_state
*rs
= get_remote_state ();
12875 const char *err_msg
= _("Tracepoint packet too large for target.");
12878 /* We use a buffer other than rs->buf because we'll build strings
12879 across multiple statements, and other statements in between could
12881 gdb::char_vector
buf (get_remote_packet_size ());
12883 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12885 tpaddr
= loc
->address
;
12886 strcpy (addrbuf
, phex (tpaddr
, sizeof (CORE_ADDR
)));
12887 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
12888 b
->number
, addrbuf
, /* address */
12889 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12890 t
->step_count
, t
->pass_count
);
12892 if (ret
< 0 || ret
>= buf
.size ())
12893 error ("%s", err_msg
);
12895 /* Fast tracepoints are mostly handled by the target, but we can
12896 tell the target how big of an instruction block should be moved
12898 if (b
->type
== bp_fast_tracepoint
)
12900 /* Only test for support at download time; we may not know
12901 target capabilities at definition time. */
12902 if (remote_supports_fast_tracepoints ())
12904 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12907 size_left
= buf
.size () - strlen (buf
.data ());
12908 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12910 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12912 if (ret
< 0 || ret
>= size_left
)
12913 error ("%s", err_msg
);
12916 /* If it passed validation at definition but fails now,
12917 something is very wrong. */
12918 internal_error (__FILE__
, __LINE__
,
12919 _("Fast tracepoint not "
12920 "valid during download"));
12923 /* Fast tracepoints are functionally identical to regular
12924 tracepoints, so don't take lack of support as a reason to
12925 give up on the trace run. */
12926 warning (_("Target does not support fast tracepoints, "
12927 "downloading %d as regular tracepoint"), b
->number
);
12929 else if (b
->type
== bp_static_tracepoint
)
12931 /* Only test for support at download time; we may not know
12932 target capabilities at definition time. */
12933 if (remote_supports_static_tracepoints ())
12935 struct static_tracepoint_marker marker
;
12937 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12939 size_left
= buf
.size () - strlen (buf
.data ());
12940 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12943 if (ret
< 0 || ret
>= size_left
)
12944 error ("%s", err_msg
);
12947 error (_("Static tracepoint not valid during download"));
12950 /* Fast tracepoints are functionally identical to regular
12951 tracepoints, so don't take lack of support as a reason
12952 to give up on the trace run. */
12953 error (_("Target does not support static tracepoints"));
12955 /* If the tracepoint has a conditional, make it into an agent
12956 expression and append to the definition. */
12959 /* Only test support at download time, we may not know target
12960 capabilities at definition time. */
12961 if (remote_supports_cond_tracepoints ())
12963 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
12966 size_left
= buf
.size () - strlen (buf
.data ());
12968 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12969 size_left
, ":X%x,", aexpr
->len
);
12971 if (ret
< 0 || ret
>= size_left
)
12972 error ("%s", err_msg
);
12974 size_left
= buf
.size () - strlen (buf
.data ());
12976 /* Two bytes to encode each aexpr byte, plus the terminating
12978 if (aexpr
->len
* 2 + 1 > size_left
)
12979 error ("%s", err_msg
);
12981 pkt
= buf
.data () + strlen (buf
.data ());
12983 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12984 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12988 warning (_("Target does not support conditional tracepoints, "
12989 "ignoring tp %d cond"), b
->number
);
12992 if (b
->commands
|| *default_collect
)
12994 size_left
= buf
.size () - strlen (buf
.data ());
12996 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12999 if (ret
< 0 || ret
>= size_left
)
13000 error ("%s", err_msg
);
13003 putpkt (buf
.data ());
13004 remote_get_noisy_reply ();
13005 if (strcmp (rs
->buf
.data (), "OK"))
13006 error (_("Target does not support tracepoints."));
13008 /* do_single_steps (t); */
13009 for (auto action_it
= tdp_actions
.begin ();
13010 action_it
!= tdp_actions
.end (); action_it
++)
13012 QUIT
; /* Allow user to bail out with ^C. */
13014 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
13015 || !stepping_actions
.empty ());
13017 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
13018 b
->number
, addrbuf
, /* address */
13019 action_it
->c_str (),
13020 has_more
? '-' : 0);
13022 if (ret
< 0 || ret
>= buf
.size ())
13023 error ("%s", err_msg
);
13025 putpkt (buf
.data ());
13026 remote_get_noisy_reply ();
13027 if (strcmp (rs
->buf
.data (), "OK"))
13028 error (_("Error on target while setting tracepoints."));
13031 for (auto action_it
= stepping_actions
.begin ();
13032 action_it
!= stepping_actions
.end (); action_it
++)
13034 QUIT
; /* Allow user to bail out with ^C. */
13036 bool is_first
= action_it
== stepping_actions
.begin ();
13037 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
13039 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
13040 b
->number
, addrbuf
, /* address */
13041 is_first
? "S" : "",
13042 action_it
->c_str (),
13043 has_more
? "-" : "");
13045 if (ret
< 0 || ret
>= buf
.size ())
13046 error ("%s", err_msg
);
13048 putpkt (buf
.data ());
13049 remote_get_noisy_reply ();
13050 if (strcmp (rs
->buf
.data (), "OK"))
13051 error (_("Error on target while setting tracepoints."));
13054 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
13056 if (b
->location
!= NULL
)
13058 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13060 if (ret
< 0 || ret
>= buf
.size ())
13061 error ("%s", err_msg
);
13063 encode_source_string (b
->number
, loc
->address
, "at",
13064 event_location_to_string (b
->location
.get ()),
13065 buf
.data () + strlen (buf
.data ()),
13066 buf
.size () - strlen (buf
.data ()));
13067 putpkt (buf
.data ());
13068 remote_get_noisy_reply ();
13069 if (strcmp (rs
->buf
.data (), "OK"))
13070 warning (_("Target does not support source download."));
13072 if (b
->cond_string
)
13074 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13076 if (ret
< 0 || ret
>= buf
.size ())
13077 error ("%s", err_msg
);
13079 encode_source_string (b
->number
, loc
->address
,
13080 "cond", b
->cond_string
,
13081 buf
.data () + strlen (buf
.data ()),
13082 buf
.size () - strlen (buf
.data ()));
13083 putpkt (buf
.data ());
13084 remote_get_noisy_reply ();
13085 if (strcmp (rs
->buf
.data (), "OK"))
13086 warning (_("Target does not support source download."));
13088 remote_download_command_source (b
->number
, loc
->address
,
13089 breakpoint_commands (b
));
13094 remote_target::can_download_tracepoint ()
13096 struct remote_state
*rs
= get_remote_state ();
13097 struct trace_status
*ts
;
13100 /* Don't try to install tracepoints until we've relocated our
13101 symbols, and fetched and merged the target's tracepoint list with
13103 if (rs
->starting_up
)
13106 ts
= current_trace_status ();
13107 status
= get_trace_status (ts
);
13109 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13112 /* If we are in a tracing experiment, but remote stub doesn't support
13113 installing tracepoint in trace, we have to return. */
13114 if (!remote_supports_install_in_trace ())
13122 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13124 struct remote_state
*rs
= get_remote_state ();
13127 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13128 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13130 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13131 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13132 >= get_remote_packet_size ())
13133 error (_("Trace state variable name too long for tsv definition packet"));
13134 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13137 remote_get_noisy_reply ();
13138 if (rs
->buf
[0] == '\0')
13139 error (_("Target does not support this command."));
13140 if (strcmp (rs
->buf
.data (), "OK") != 0)
13141 error (_("Error on target while downloading trace state variable."));
13145 remote_target::enable_tracepoint (struct bp_location
*location
)
13147 struct remote_state
*rs
= get_remote_state ();
13149 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13150 location
->owner
->number
,
13151 phex (location
->address
, sizeof (CORE_ADDR
)));
13153 remote_get_noisy_reply ();
13154 if (rs
->buf
[0] == '\0')
13155 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13156 if (strcmp (rs
->buf
.data (), "OK") != 0)
13157 error (_("Error on target while enabling tracepoint."));
13161 remote_target::disable_tracepoint (struct bp_location
*location
)
13163 struct remote_state
*rs
= get_remote_state ();
13165 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13166 location
->owner
->number
,
13167 phex (location
->address
, sizeof (CORE_ADDR
)));
13169 remote_get_noisy_reply ();
13170 if (rs
->buf
[0] == '\0')
13171 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13172 if (strcmp (rs
->buf
.data (), "OK") != 0)
13173 error (_("Error on target while disabling tracepoint."));
13177 remote_target::trace_set_readonly_regions ()
13180 bfd_size_type size
;
13185 if (!current_program_space
->exec_bfd ())
13186 return; /* No information to give. */
13188 struct remote_state
*rs
= get_remote_state ();
13190 strcpy (rs
->buf
.data (), "QTro");
13191 offset
= strlen (rs
->buf
.data ());
13192 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
13194 char tmp1
[40], tmp2
[40];
13197 if ((s
->flags
& SEC_LOAD
) == 0 ||
13198 /* (s->flags & SEC_CODE) == 0 || */
13199 (s
->flags
& SEC_READONLY
) == 0)
13203 vma
= bfd_section_vma (s
);
13204 size
= bfd_section_size (s
);
13205 sprintf_vma (tmp1
, vma
);
13206 sprintf_vma (tmp2
, vma
+ size
);
13207 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13208 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13210 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13212 Too many sections for read-only sections definition packet."));
13215 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13217 offset
+= sec_length
;
13222 getpkt (&rs
->buf
, 0);
13227 remote_target::trace_start ()
13229 struct remote_state
*rs
= get_remote_state ();
13231 putpkt ("QTStart");
13232 remote_get_noisy_reply ();
13233 if (rs
->buf
[0] == '\0')
13234 error (_("Target does not support this command."));
13235 if (strcmp (rs
->buf
.data (), "OK") != 0)
13236 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13240 remote_target::get_trace_status (struct trace_status
*ts
)
13242 /* Initialize it just to avoid a GCC false warning. */
13244 enum packet_result result
;
13245 struct remote_state
*rs
= get_remote_state ();
13247 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13250 /* FIXME we need to get register block size some other way. */
13251 trace_regblock_size
13252 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13254 putpkt ("qTStatus");
13258 p
= remote_get_noisy_reply ();
13260 catch (const gdb_exception_error
&ex
)
13262 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13264 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13270 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13272 /* If the remote target doesn't do tracing, flag it. */
13273 if (result
== PACKET_UNKNOWN
)
13276 /* We're working with a live target. */
13277 ts
->filename
= NULL
;
13280 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13282 /* Function 'parse_trace_status' sets default value of each field of
13283 'ts' at first, so we don't have to do it here. */
13284 parse_trace_status (p
, ts
);
13286 return ts
->running
;
13290 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13291 struct uploaded_tp
*utp
)
13293 struct remote_state
*rs
= get_remote_state ();
13295 struct bp_location
*loc
;
13296 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13297 size_t size
= get_remote_packet_size ();
13302 tp
->traceframe_usage
= 0;
13303 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
13305 /* If the tracepoint was never downloaded, don't go asking for
13307 if (tp
->number_on_target
== 0)
13309 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13310 phex_nz (loc
->address
, 0));
13312 reply
= remote_get_noisy_reply ();
13313 if (reply
&& *reply
)
13316 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13322 utp
->hit_count
= 0;
13323 utp
->traceframe_usage
= 0;
13324 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13325 phex_nz (utp
->addr
, 0));
13327 reply
= remote_get_noisy_reply ();
13328 if (reply
&& *reply
)
13331 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13337 remote_target::trace_stop ()
13339 struct remote_state
*rs
= get_remote_state ();
13342 remote_get_noisy_reply ();
13343 if (rs
->buf
[0] == '\0')
13344 error (_("Target does not support this command."));
13345 if (strcmp (rs
->buf
.data (), "OK") != 0)
13346 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13350 remote_target::trace_find (enum trace_find_type type
, int num
,
13351 CORE_ADDR addr1
, CORE_ADDR addr2
,
13354 struct remote_state
*rs
= get_remote_state ();
13355 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13357 int target_frameno
= -1, target_tracept
= -1;
13359 /* Lookups other than by absolute frame number depend on the current
13360 trace selected, so make sure it is correct on the remote end
13362 if (type
!= tfind_number
)
13363 set_remote_traceframe ();
13365 p
= rs
->buf
.data ();
13366 strcpy (p
, "QTFrame:");
13367 p
= strchr (p
, '\0');
13371 xsnprintf (p
, endbuf
- p
, "%x", num
);
13374 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13377 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13380 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13381 phex_nz (addr2
, 0));
13383 case tfind_outside
:
13384 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13385 phex_nz (addr2
, 0));
13388 error (_("Unknown trace find type %d"), type
);
13392 reply
= remote_get_noisy_reply ();
13393 if (*reply
== '\0')
13394 error (_("Target does not support this command."));
13396 while (reply
&& *reply
)
13401 target_frameno
= (int) strtol (p
, &reply
, 16);
13403 error (_("Unable to parse trace frame number"));
13404 /* Don't update our remote traceframe number cache on failure
13405 to select a remote traceframe. */
13406 if (target_frameno
== -1)
13411 target_tracept
= (int) strtol (p
, &reply
, 16);
13413 error (_("Unable to parse tracepoint number"));
13415 case 'O': /* "OK"? */
13416 if (reply
[1] == 'K' && reply
[2] == '\0')
13419 error (_("Bogus reply from target: %s"), reply
);
13422 error (_("Bogus reply from target: %s"), reply
);
13425 *tpp
= target_tracept
;
13427 rs
->remote_traceframe_number
= target_frameno
;
13428 return target_frameno
;
13432 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13434 struct remote_state
*rs
= get_remote_state ();
13438 set_remote_traceframe ();
13440 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13442 reply
= remote_get_noisy_reply ();
13443 if (reply
&& *reply
)
13447 unpack_varlen_hex (reply
+ 1, &uval
);
13448 *val
= (LONGEST
) uval
;
13456 remote_target::save_trace_data (const char *filename
)
13458 struct remote_state
*rs
= get_remote_state ();
13461 p
= rs
->buf
.data ();
13462 strcpy (p
, "QTSave:");
13464 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13465 >= get_remote_packet_size ())
13466 error (_("Remote file name too long for trace save packet"));
13467 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13470 reply
= remote_get_noisy_reply ();
13471 if (*reply
== '\0')
13472 error (_("Target does not support this command."));
13473 if (strcmp (reply
, "OK") != 0)
13474 error (_("Bogus reply from target: %s"), reply
);
13478 /* This is basically a memory transfer, but needs to be its own packet
13479 because we don't know how the target actually organizes its trace
13480 memory, plus we want to be able to ask for as much as possible, but
13481 not be unhappy if we don't get as much as we ask for. */
13484 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13486 struct remote_state
*rs
= get_remote_state ();
13491 p
= rs
->buf
.data ();
13492 strcpy (p
, "qTBuffer:");
13494 p
+= hexnumstr (p
, offset
);
13496 p
+= hexnumstr (p
, len
);
13500 reply
= remote_get_noisy_reply ();
13501 if (reply
&& *reply
)
13503 /* 'l' by itself means we're at the end of the buffer and
13504 there is nothing more to get. */
13508 /* Convert the reply into binary. Limit the number of bytes to
13509 convert according to our passed-in buffer size, rather than
13510 what was returned in the packet; if the target is
13511 unexpectedly generous and gives us a bigger reply than we
13512 asked for, we don't want to crash. */
13513 rslt
= hex2bin (reply
, buf
, len
);
13517 /* Something went wrong, flag as an error. */
13522 remote_target::set_disconnected_tracing (int val
)
13524 struct remote_state
*rs
= get_remote_state ();
13526 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13530 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13531 "QTDisconnected:%x", val
);
13533 reply
= remote_get_noisy_reply ();
13534 if (*reply
== '\0')
13535 error (_("Target does not support this command."));
13536 if (strcmp (reply
, "OK") != 0)
13537 error (_("Bogus reply from target: %s"), reply
);
13540 warning (_("Target does not support disconnected tracing."));
13544 remote_target::core_of_thread (ptid_t ptid
)
13546 thread_info
*info
= find_thread_ptid (this, ptid
);
13548 if (info
!= NULL
&& info
->priv
!= NULL
)
13549 return get_remote_thread_info (info
)->core
;
13555 remote_target::set_circular_trace_buffer (int val
)
13557 struct remote_state
*rs
= get_remote_state ();
13560 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13561 "QTBuffer:circular:%x", val
);
13563 reply
= remote_get_noisy_reply ();
13564 if (*reply
== '\0')
13565 error (_("Target does not support this command."));
13566 if (strcmp (reply
, "OK") != 0)
13567 error (_("Bogus reply from target: %s"), reply
);
13571 remote_target::traceframe_info ()
13573 gdb::optional
<gdb::char_vector
> text
13574 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO
,
13577 return parse_traceframe_info (text
->data ());
13582 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13583 instruction on which a fast tracepoint may be placed. Returns -1
13584 if the packet is not supported, and 0 if the minimum instruction
13585 length is unknown. */
13588 remote_target::get_min_fast_tracepoint_insn_len ()
13590 struct remote_state
*rs
= get_remote_state ();
13593 /* If we're not debugging a process yet, the IPA can't be
13595 if (!target_has_execution ())
13598 /* Make sure the remote is pointing at the right process. */
13599 set_general_process ();
13601 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13603 reply
= remote_get_noisy_reply ();
13604 if (*reply
== '\0')
13608 ULONGEST min_insn_len
;
13610 unpack_varlen_hex (reply
, &min_insn_len
);
13612 return (int) min_insn_len
;
13617 remote_target::set_trace_buffer_size (LONGEST val
)
13619 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13621 struct remote_state
*rs
= get_remote_state ();
13622 char *buf
= rs
->buf
.data ();
13623 char *endbuf
= buf
+ get_remote_packet_size ();
13624 enum packet_result result
;
13626 gdb_assert (val
>= 0 || val
== -1);
13627 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13628 /* Send -1 as literal "-1" to avoid host size dependency. */
13632 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13635 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13638 remote_get_noisy_reply ();
13639 result
= packet_ok (rs
->buf
,
13640 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13642 if (result
!= PACKET_OK
)
13643 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13648 remote_target::set_trace_notes (const char *user
, const char *notes
,
13649 const char *stop_notes
)
13651 struct remote_state
*rs
= get_remote_state ();
13653 char *buf
= rs
->buf
.data ();
13654 char *endbuf
= buf
+ get_remote_packet_size ();
13657 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13660 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13661 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13667 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13668 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13674 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13675 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13679 /* Ensure the buffer is terminated. */
13683 reply
= remote_get_noisy_reply ();
13684 if (*reply
== '\0')
13687 if (strcmp (reply
, "OK") != 0)
13688 error (_("Bogus reply from target: %s"), reply
);
13694 remote_target::use_agent (bool use
)
13696 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13698 struct remote_state
*rs
= get_remote_state ();
13700 /* If the stub supports QAgent. */
13701 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13703 getpkt (&rs
->buf
, 0);
13705 if (strcmp (rs
->buf
.data (), "OK") == 0)
13716 remote_target::can_use_agent ()
13718 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13721 struct btrace_target_info
13723 /* The ptid of the traced thread. */
13726 /* The obtained branch trace configuration. */
13727 struct btrace_config conf
;
13730 /* Reset our idea of our target's btrace configuration. */
13733 remote_btrace_reset (remote_state
*rs
)
13735 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13738 /* Synchronize the configuration with the target. */
13741 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13743 struct packet_config
*packet
;
13744 struct remote_state
*rs
;
13745 char *buf
, *pos
, *endbuf
;
13747 rs
= get_remote_state ();
13748 buf
= rs
->buf
.data ();
13749 endbuf
= buf
+ get_remote_packet_size ();
13751 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13752 if (packet_config_support (packet
) == PACKET_ENABLE
13753 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13756 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13760 getpkt (&rs
->buf
, 0);
13762 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13764 if (buf
[0] == 'E' && buf
[1] == '.')
13765 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13767 error (_("Failed to configure the BTS buffer size."));
13770 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13773 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13774 if (packet_config_support (packet
) == PACKET_ENABLE
13775 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13778 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13782 getpkt (&rs
->buf
, 0);
13784 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13786 if (buf
[0] == 'E' && buf
[1] == '.')
13787 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13789 error (_("Failed to configure the trace buffer size."));
13792 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13796 /* Read the current thread's btrace configuration from the target and
13797 store it into CONF. */
13800 btrace_read_config (struct btrace_config
*conf
)
13802 gdb::optional
<gdb::char_vector
> xml
13803 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF
, "");
13805 parse_xml_btrace_conf (conf
, xml
->data ());
13808 /* Maybe reopen target btrace. */
13811 remote_target::remote_btrace_maybe_reopen ()
13813 struct remote_state
*rs
= get_remote_state ();
13814 int btrace_target_pushed
= 0;
13815 #if !defined (HAVE_LIBIPT)
13819 /* Don't bother walking the entirety of the remote thread list when
13820 we know the feature isn't supported by the remote. */
13821 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
13824 scoped_restore_current_thread restore_thread
;
13826 for (thread_info
*tp
: all_non_exited_threads (this))
13828 set_general_thread (tp
->ptid
);
13830 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13831 btrace_read_config (&rs
->btrace_config
);
13833 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13836 #if !defined (HAVE_LIBIPT)
13837 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13842 warning (_("Target is recording using Intel Processor Trace "
13843 "but support was disabled at compile time."));
13848 #endif /* !defined (HAVE_LIBIPT) */
13850 /* Push target, once, but before anything else happens. This way our
13851 changes to the threads will be cleaned up by unpushing the target
13852 in case btrace_read_config () throws. */
13853 if (!btrace_target_pushed
)
13855 btrace_target_pushed
= 1;
13856 record_btrace_push_target ();
13857 printf_filtered (_("Target is recording using %s.\n"),
13858 btrace_format_string (rs
->btrace_config
.format
));
13861 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13862 tp
->btrace
.target
->ptid
= tp
->ptid
;
13863 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13867 /* Enable branch tracing. */
13869 struct btrace_target_info
*
13870 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
13872 struct btrace_target_info
*tinfo
= NULL
;
13873 struct packet_config
*packet
= NULL
;
13874 struct remote_state
*rs
= get_remote_state ();
13875 char *buf
= rs
->buf
.data ();
13876 char *endbuf
= buf
+ get_remote_packet_size ();
13878 switch (conf
->format
)
13880 case BTRACE_FORMAT_BTS
:
13881 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13884 case BTRACE_FORMAT_PT
:
13885 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13889 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13890 error (_("Target does not support branch tracing."));
13892 btrace_sync_conf (conf
);
13894 set_general_thread (ptid
);
13896 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13898 getpkt (&rs
->buf
, 0);
13900 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13902 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13903 error (_("Could not enable branch tracing for %s: %s"),
13904 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
13906 error (_("Could not enable branch tracing for %s."),
13907 target_pid_to_str (ptid
).c_str ());
13910 tinfo
= XCNEW (struct btrace_target_info
);
13911 tinfo
->ptid
= ptid
;
13913 /* If we fail to read the configuration, we lose some information, but the
13914 tracing itself is not impacted. */
13917 btrace_read_config (&tinfo
->conf
);
13919 catch (const gdb_exception_error
&err
)
13921 if (err
.message
!= NULL
)
13922 warning ("%s", err
.what ());
13928 /* Disable branch tracing. */
13931 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
13933 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13934 struct remote_state
*rs
= get_remote_state ();
13935 char *buf
= rs
->buf
.data ();
13936 char *endbuf
= buf
+ get_remote_packet_size ();
13938 if (packet_config_support (packet
) != PACKET_ENABLE
)
13939 error (_("Target does not support branch tracing."));
13941 set_general_thread (tinfo
->ptid
);
13943 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13945 getpkt (&rs
->buf
, 0);
13947 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13949 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13950 error (_("Could not disable branch tracing for %s: %s"),
13951 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
13953 error (_("Could not disable branch tracing for %s."),
13954 target_pid_to_str (tinfo
->ptid
).c_str ());
13960 /* Teardown branch tracing. */
13963 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
13965 /* We must not talk to the target during teardown. */
13969 /* Read the branch trace. */
13972 remote_target::read_btrace (struct btrace_data
*btrace
,
13973 struct btrace_target_info
*tinfo
,
13974 enum btrace_read_type type
)
13976 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13979 if (packet_config_support (packet
) != PACKET_ENABLE
)
13980 error (_("Target does not support branch tracing."));
13982 #if !defined(HAVE_LIBEXPAT)
13983 error (_("Cannot process branch tracing result. XML parsing not supported."));
13988 case BTRACE_READ_ALL
:
13991 case BTRACE_READ_NEW
:
13994 case BTRACE_READ_DELTA
:
13998 internal_error (__FILE__
, __LINE__
,
13999 _("Bad branch tracing read type: %u."),
14000 (unsigned int) type
);
14003 gdb::optional
<gdb::char_vector
> xml
14004 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE
, annex
);
14006 return BTRACE_ERR_UNKNOWN
;
14008 parse_xml_btrace (btrace
, xml
->data ());
14010 return BTRACE_ERR_NONE
;
14013 const struct btrace_config
*
14014 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
14016 return &tinfo
->conf
;
14020 remote_target::augmented_libraries_svr4_read ()
14022 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
14026 /* Implementation of to_load. */
14029 remote_target::load (const char *name
, int from_tty
)
14031 generic_load (name
, from_tty
);
14034 /* Accepts an integer PID; returns a string representing a file that
14035 can be opened on the remote side to get the symbols for the child
14036 process. Returns NULL if the operation is not supported. */
14039 remote_target::pid_to_exec_file (int pid
)
14041 static gdb::optional
<gdb::char_vector
> filename
;
14042 char *annex
= NULL
;
14044 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
14047 inferior
*inf
= find_inferior_pid (this, pid
);
14049 internal_error (__FILE__
, __LINE__
,
14050 _("not currently attached to process %d"), pid
);
14052 if (!inf
->fake_pid_p
)
14054 const int annex_size
= 9;
14056 annex
= (char *) alloca (annex_size
);
14057 xsnprintf (annex
, annex_size
, "%x", pid
);
14060 filename
= target_read_stralloc (current_top_target (),
14061 TARGET_OBJECT_EXEC_FILE
, annex
);
14063 return filename
? filename
->data () : nullptr;
14066 /* Implement the to_can_do_single_step target_ops method. */
14069 remote_target::can_do_single_step ()
14071 /* We can only tell whether target supports single step or not by
14072 supported s and S vCont actions if the stub supports vContSupported
14073 feature. If the stub doesn't support vContSupported feature,
14074 we have conservatively to think target doesn't supports single
14076 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
14078 struct remote_state
*rs
= get_remote_state ();
14080 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14081 remote_vcont_probe ();
14083 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14089 /* Implementation of the to_execution_direction method for the remote
14092 enum exec_direction_kind
14093 remote_target::execution_direction ()
14095 struct remote_state
*rs
= get_remote_state ();
14097 return rs
->last_resume_exec_dir
;
14100 /* Return pointer to the thread_info struct which corresponds to
14101 THREAD_HANDLE (having length HANDLE_LEN). */
14104 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14108 for (thread_info
*tp
: all_non_exited_threads (this))
14110 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14112 if (tp
->inf
== inf
&& priv
!= NULL
)
14114 if (handle_len
!= priv
->thread_handle
.size ())
14115 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14116 handle_len
, priv
->thread_handle
.size ());
14117 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14127 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14129 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14130 return priv
->thread_handle
;
14134 remote_target::can_async_p ()
14136 struct remote_state
*rs
= get_remote_state ();
14138 /* We don't go async if the user has explicitly prevented it with the
14139 "maint set target-async" command. */
14140 if (!target_async_permitted
)
14143 /* We're async whenever the serial device is. */
14144 return serial_can_async_p (rs
->remote_desc
);
14148 remote_target::is_async_p ()
14150 struct remote_state
*rs
= get_remote_state ();
14152 if (!target_async_permitted
)
14153 /* We only enable async when the user specifically asks for it. */
14156 /* We're async whenever the serial device is. */
14157 return serial_is_async_p (rs
->remote_desc
);
14160 /* Pass the SERIAL event on and up to the client. One day this code
14161 will be able to delay notifying the client of an event until the
14162 point where an entire packet has been received. */
14164 static serial_event_ftype remote_async_serial_handler
;
14167 remote_async_serial_handler (struct serial
*scb
, void *context
)
14169 /* Don't propogate error information up to the client. Instead let
14170 the client find out about the error by querying the target. */
14171 inferior_event_handler (INF_REG_EVENT
);
14175 remote_async_inferior_event_handler (gdb_client_data data
)
14177 inferior_event_handler (INF_REG_EVENT
);
14179 remote_target
*remote
= (remote_target
*) data
;
14180 remote_state
*rs
= remote
->get_remote_state ();
14182 /* inferior_event_handler may have consumed an event pending on the
14183 infrun side without calling target_wait on the REMOTE target, or
14184 may have pulled an event out of a different target. Keep trying
14185 for this remote target as long it still has either pending events
14186 or unacknowledged notifications. */
14188 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
14189 || !rs
->stop_reply_queue
.empty ())
14190 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14194 remote_target::async_wait_fd ()
14196 struct remote_state
*rs
= get_remote_state ();
14197 return rs
->remote_desc
->fd
;
14201 remote_target::async (int enable
)
14203 struct remote_state
*rs
= get_remote_state ();
14207 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14209 /* If there are pending events in the stop reply queue tell the
14210 event loop to process them. */
14211 if (!rs
->stop_reply_queue
.empty ())
14212 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14213 /* For simplicity, below we clear the pending events token
14214 without remembering whether it is marked, so here we always
14215 mark it. If there's actually no pending notification to
14216 process, this ends up being a no-op (other than a spurious
14217 event-loop wakeup). */
14218 if (target_is_non_stop_p ())
14219 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14223 serial_async (rs
->remote_desc
, NULL
, NULL
);
14224 /* If the core is disabling async, it doesn't want to be
14225 disturbed with target events. Clear all async event sources
14227 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14228 if (target_is_non_stop_p ())
14229 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14233 /* Implementation of the to_thread_events method. */
14236 remote_target::thread_events (int enable
)
14238 struct remote_state
*rs
= get_remote_state ();
14239 size_t size
= get_remote_packet_size ();
14241 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14244 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14246 getpkt (&rs
->buf
, 0);
14248 switch (packet_ok (rs
->buf
,
14249 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14252 if (strcmp (rs
->buf
.data (), "OK") != 0)
14253 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14256 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14258 case PACKET_UNKNOWN
:
14264 show_remote_cmd (const char *args
, int from_tty
)
14266 /* We can't just use cmd_show_list here, because we want to skip
14267 the redundant "show remote Z-packet" and the legacy aliases. */
14268 struct cmd_list_element
*list
= remote_show_cmdlist
;
14269 struct ui_out
*uiout
= current_uiout
;
14271 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14272 for (; list
!= NULL
; list
= list
->next
)
14273 if (strcmp (list
->name
, "Z-packet") == 0)
14275 else if (list
->type
== not_set_cmd
)
14276 /* Alias commands are exactly like the original, except they
14277 don't have the normal type. */
14281 ui_out_emit_tuple
option_emitter (uiout
, "option");
14283 uiout
->field_string ("name", list
->name
);
14284 uiout
->text (": ");
14285 if (list
->type
== show_cmd
)
14286 do_show_command (NULL
, from_tty
, list
);
14288 cmd_func (list
, NULL
, from_tty
);
14293 /* Function to be called whenever a new objfile (shlib) is detected. */
14295 remote_new_objfile (struct objfile
*objfile
)
14297 remote_target
*remote
= get_current_remote_target ();
14299 if (remote
!= NULL
) /* Have a remote connection. */
14300 remote
->remote_check_symbols ();
14303 /* Pull all the tracepoints defined on the target and create local
14304 data structures representing them. We don't want to create real
14305 tracepoints yet, we don't want to mess up the user's existing
14309 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14311 struct remote_state
*rs
= get_remote_state ();
14314 /* Ask for a first packet of tracepoint definition. */
14316 getpkt (&rs
->buf
, 0);
14317 p
= rs
->buf
.data ();
14318 while (*p
&& *p
!= 'l')
14320 parse_tracepoint_definition (p
, utpp
);
14321 /* Ask for another packet of tracepoint definition. */
14323 getpkt (&rs
->buf
, 0);
14324 p
= rs
->buf
.data ();
14330 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14332 struct remote_state
*rs
= get_remote_state ();
14335 /* Ask for a first packet of variable definition. */
14337 getpkt (&rs
->buf
, 0);
14338 p
= rs
->buf
.data ();
14339 while (*p
&& *p
!= 'l')
14341 parse_tsv_definition (p
, utsvp
);
14342 /* Ask for another packet of variable definition. */
14344 getpkt (&rs
->buf
, 0);
14345 p
= rs
->buf
.data ();
14350 /* The "set/show range-stepping" show hook. */
14353 show_range_stepping (struct ui_file
*file
, int from_tty
,
14354 struct cmd_list_element
*c
,
14357 fprintf_filtered (file
,
14358 _("Debugger's willingness to use range stepping "
14359 "is %s.\n"), value
);
14362 /* Return true if the vCont;r action is supported by the remote
14366 remote_target::vcont_r_supported ()
14368 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14369 remote_vcont_probe ();
14371 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14372 && get_remote_state ()->supports_vCont
.r
);
14375 /* The "set/show range-stepping" set hook. */
14378 set_range_stepping (const char *ignore_args
, int from_tty
,
14379 struct cmd_list_element
*c
)
14381 /* When enabling, check whether range stepping is actually supported
14382 by the target, and warn if not. */
14383 if (use_range_stepping
)
14385 remote_target
*remote
= get_current_remote_target ();
14387 || !remote
->vcont_r_supported ())
14388 warning (_("Range stepping is not supported by the current target"));
14392 void _initialize_remote ();
14394 _initialize_remote ()
14396 struct cmd_list_element
*cmd
;
14397 const char *cmd_name
;
14399 /* architecture specific data */
14400 remote_g_packet_data_handle
=
14401 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14403 add_target (remote_target_info
, remote_target::open
);
14404 add_target (extended_remote_target_info
, extended_remote_target::open
);
14406 /* Hook into new objfile notification. */
14407 gdb::observers::new_objfile
.attach (remote_new_objfile
);
14410 init_remote_threadtests ();
14413 /* set/show remote ... */
14415 add_basic_prefix_cmd ("remote", class_maintenance
, _("\
14416 Remote protocol specific variables.\n\
14417 Configure various remote-protocol specific variables such as\n\
14418 the packets being used."),
14419 &remote_set_cmdlist
, "set remote ",
14420 0 /* allow-unknown */, &setlist
);
14421 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14422 Remote protocol specific variables.\n\
14423 Configure various remote-protocol specific variables such as\n\
14424 the packets being used."),
14425 &remote_show_cmdlist
, "show remote ",
14426 0 /* allow-unknown */, &showlist
);
14428 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14429 Compare section data on target to the exec file.\n\
14430 Argument is a single section name (default: all loaded sections).\n\
14431 To compare only read-only loaded sections, specify the -r option."),
14434 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14435 Send an arbitrary packet to a remote target.\n\
14436 maintenance packet TEXT\n\
14437 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14438 this command sends the string TEXT to the inferior, and displays the\n\
14439 response packet. GDB supplies the initial `$' character, and the\n\
14440 terminating `#' character and checksum."),
14443 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14444 Set whether to send break if interrupted."), _("\
14445 Show whether to send break if interrupted."), _("\
14446 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14447 set_remotebreak
, show_remotebreak
,
14448 &setlist
, &showlist
);
14449 cmd_name
= "remotebreak";
14450 cmd
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
14451 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14452 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14453 cmd
= lookup_cmd (&cmd_name
, showlist
, "", NULL
, -1, 1);
14454 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14456 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14457 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14459 Set interrupt sequence to remote target."), _("\
14460 Show interrupt sequence to remote target."), _("\
14461 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14462 NULL
, show_interrupt_sequence
,
14463 &remote_set_cmdlist
,
14464 &remote_show_cmdlist
);
14466 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14467 &interrupt_on_connect
, _("\
14468 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14469 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14470 If set, interrupt sequence is sent to remote target."),
14472 &remote_set_cmdlist
, &remote_show_cmdlist
);
14474 /* Install commands for configuring memory read/write packets. */
14476 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14477 Set the maximum number of bytes per memory write packet (deprecated)."),
14479 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14480 Show the maximum number of bytes per memory write packet (deprecated)."),
14482 add_cmd ("memory-write-packet-size", no_class
,
14483 set_memory_write_packet_size
, _("\
14484 Set the maximum number of bytes per memory-write packet.\n\
14485 Specify the number of bytes in a packet or 0 (zero) for the\n\
14486 default packet size. The actual limit is further reduced\n\
14487 dependent on the target. Specify ``fixed'' to disable the\n\
14488 further restriction and ``limit'' to enable that restriction."),
14489 &remote_set_cmdlist
);
14490 add_cmd ("memory-read-packet-size", no_class
,
14491 set_memory_read_packet_size
, _("\
14492 Set the maximum number of bytes per memory-read packet.\n\
14493 Specify the number of bytes in a packet or 0 (zero) for the\n\
14494 default packet size. The actual limit is further reduced\n\
14495 dependent on the target. Specify ``fixed'' to disable the\n\
14496 further restriction and ``limit'' to enable that restriction."),
14497 &remote_set_cmdlist
);
14498 add_cmd ("memory-write-packet-size", no_class
,
14499 show_memory_write_packet_size
,
14500 _("Show the maximum number of bytes per memory-write packet."),
14501 &remote_show_cmdlist
);
14502 add_cmd ("memory-read-packet-size", no_class
,
14503 show_memory_read_packet_size
,
14504 _("Show the maximum number of bytes per memory-read packet."),
14505 &remote_show_cmdlist
);
14507 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14508 &remote_hw_watchpoint_limit
, _("\
14509 Set the maximum number of target hardware watchpoints."), _("\
14510 Show the maximum number of target hardware watchpoints."), _("\
14511 Specify \"unlimited\" for unlimited hardware watchpoints."),
14512 NULL
, show_hardware_watchpoint_limit
,
14513 &remote_set_cmdlist
,
14514 &remote_show_cmdlist
);
14515 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14517 &remote_hw_watchpoint_length_limit
, _("\
14518 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14519 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14520 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14521 NULL
, show_hardware_watchpoint_length_limit
,
14522 &remote_set_cmdlist
, &remote_show_cmdlist
);
14523 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14524 &remote_hw_breakpoint_limit
, _("\
14525 Set the maximum number of target hardware breakpoints."), _("\
14526 Show the maximum number of target hardware breakpoints."), _("\
14527 Specify \"unlimited\" for unlimited hardware breakpoints."),
14528 NULL
, show_hardware_breakpoint_limit
,
14529 &remote_set_cmdlist
, &remote_show_cmdlist
);
14531 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14532 &remote_address_size
, _("\
14533 Set the maximum size of the address (in bits) in a memory packet."), _("\
14534 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14536 NULL
, /* FIXME: i18n: */
14537 &setlist
, &showlist
);
14539 init_all_packet_configs ();
14541 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14542 "X", "binary-download", 1);
14544 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14545 "vCont", "verbose-resume", 0);
14547 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14548 "QPassSignals", "pass-signals", 0);
14550 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14551 "QCatchSyscalls", "catch-syscalls", 0);
14553 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14554 "QProgramSignals", "program-signals", 0);
14556 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14557 "QSetWorkingDir", "set-working-dir", 0);
14559 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14560 "QStartupWithShell", "startup-with-shell", 0);
14562 add_packet_config_cmd (&remote_protocol_packets
14563 [PACKET_QEnvironmentHexEncoded
],
14564 "QEnvironmentHexEncoded", "environment-hex-encoded",
14567 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14568 "QEnvironmentReset", "environment-reset",
14571 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14572 "QEnvironmentUnset", "environment-unset",
14575 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14576 "qSymbol", "symbol-lookup", 0);
14578 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14579 "P", "set-register", 1);
14581 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14582 "p", "fetch-register", 1);
14584 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14585 "Z0", "software-breakpoint", 0);
14587 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14588 "Z1", "hardware-breakpoint", 0);
14590 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14591 "Z2", "write-watchpoint", 0);
14593 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14594 "Z3", "read-watchpoint", 0);
14596 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14597 "Z4", "access-watchpoint", 0);
14599 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14600 "qXfer:auxv:read", "read-aux-vector", 0);
14602 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14603 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14605 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14606 "qXfer:features:read", "target-features", 0);
14608 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14609 "qXfer:libraries:read", "library-info", 0);
14611 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14612 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14614 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14615 "qXfer:memory-map:read", "memory-map", 0);
14617 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14618 "qXfer:osdata:read", "osdata", 0);
14620 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14621 "qXfer:threads:read", "threads", 0);
14623 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14624 "qXfer:siginfo:read", "read-siginfo-object", 0);
14626 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14627 "qXfer:siginfo:write", "write-siginfo-object", 0);
14629 add_packet_config_cmd
14630 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14631 "qXfer:traceframe-info:read", "traceframe-info", 0);
14633 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14634 "qXfer:uib:read", "unwind-info-block", 0);
14636 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14637 "qGetTLSAddr", "get-thread-local-storage-address",
14640 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14641 "qGetTIBAddr", "get-thread-information-block-address",
14644 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14645 "bc", "reverse-continue", 0);
14647 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14648 "bs", "reverse-step", 0);
14650 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14651 "qSupported", "supported-packets", 0);
14653 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14654 "qSearch:memory", "search-memory", 0);
14656 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14657 "qTStatus", "trace-status", 0);
14659 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14660 "vFile:setfs", "hostio-setfs", 0);
14662 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14663 "vFile:open", "hostio-open", 0);
14665 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14666 "vFile:pread", "hostio-pread", 0);
14668 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14669 "vFile:pwrite", "hostio-pwrite", 0);
14671 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14672 "vFile:close", "hostio-close", 0);
14674 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14675 "vFile:unlink", "hostio-unlink", 0);
14677 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14678 "vFile:readlink", "hostio-readlink", 0);
14680 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14681 "vFile:fstat", "hostio-fstat", 0);
14683 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14684 "vAttach", "attach", 0);
14686 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14689 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14690 "QStartNoAckMode", "noack", 0);
14692 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14693 "vKill", "kill", 0);
14695 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14696 "qAttached", "query-attached", 0);
14698 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14699 "ConditionalTracepoints",
14700 "conditional-tracepoints", 0);
14702 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14703 "ConditionalBreakpoints",
14704 "conditional-breakpoints", 0);
14706 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14707 "BreakpointCommands",
14708 "breakpoint-commands", 0);
14710 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14711 "FastTracepoints", "fast-tracepoints", 0);
14713 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14714 "TracepointSource", "TracepointSource", 0);
14716 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14717 "QAllow", "allow", 0);
14719 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14720 "StaticTracepoints", "static-tracepoints", 0);
14722 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14723 "InstallInTrace", "install-in-trace", 0);
14725 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14726 "qXfer:statictrace:read", "read-sdata-object", 0);
14728 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14729 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14731 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14732 "QDisableRandomization", "disable-randomization", 0);
14734 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14735 "QAgent", "agent", 0);
14737 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14738 "QTBuffer:size", "trace-buffer-size", 0);
14740 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14741 "Qbtrace:off", "disable-btrace", 0);
14743 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14744 "Qbtrace:bts", "enable-btrace-bts", 0);
14746 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14747 "Qbtrace:pt", "enable-btrace-pt", 0);
14749 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14750 "qXfer:btrace", "read-btrace", 0);
14752 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14753 "qXfer:btrace-conf", "read-btrace-conf", 0);
14755 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14756 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14758 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14759 "multiprocess-feature", "multiprocess-feature", 0);
14761 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14762 "swbreak-feature", "swbreak-feature", 0);
14764 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14765 "hwbreak-feature", "hwbreak-feature", 0);
14767 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14768 "fork-event-feature", "fork-event-feature", 0);
14770 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14771 "vfork-event-feature", "vfork-event-feature", 0);
14773 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14774 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14776 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14777 "vContSupported", "verbose-resume-supported", 0);
14779 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14780 "exec-event-feature", "exec-event-feature", 0);
14782 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14783 "vCtrlC", "ctrl-c", 0);
14785 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14786 "QThreadEvents", "thread-events", 0);
14788 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14789 "N stop reply", "no-resumed-stop-reply", 0);
14791 /* Assert that we've registered "set remote foo-packet" commands
14792 for all packet configs. */
14796 for (i
= 0; i
< PACKET_MAX
; i
++)
14798 /* Ideally all configs would have a command associated. Some
14799 still don't though. */
14804 case PACKET_QNonStop
:
14805 case PACKET_EnableDisableTracepoints_feature
:
14806 case PACKET_tracenz_feature
:
14807 case PACKET_DisconnectedTracing_feature
:
14808 case PACKET_augmented_libraries_svr4_read_feature
:
14810 /* Additions to this list need to be well justified:
14811 pre-existing packets are OK; new packets are not. */
14819 /* This catches both forgetting to add a config command, and
14820 forgetting to remove a packet from the exception list. */
14821 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14825 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14826 Z sub-packet has its own set and show commands, but users may
14827 have sets to this variable in their .gdbinit files (or in their
14829 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14830 &remote_Z_packet_detect
, _("\
14831 Set use of remote protocol `Z' packets."), _("\
14832 Show use of remote protocol `Z' packets."), _("\
14833 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14835 set_remote_protocol_Z_packet_cmd
,
14836 show_remote_protocol_Z_packet_cmd
,
14837 /* FIXME: i18n: Use of remote protocol
14838 `Z' packets is %s. */
14839 &remote_set_cmdlist
, &remote_show_cmdlist
);
14841 add_basic_prefix_cmd ("remote", class_files
, _("\
14842 Manipulate files on the remote system.\n\
14843 Transfer files to and from the remote target system."),
14844 &remote_cmdlist
, "remote ",
14845 0 /* allow-unknown */, &cmdlist
);
14847 add_cmd ("put", class_files
, remote_put_command
,
14848 _("Copy a local file to the remote system."),
14851 add_cmd ("get", class_files
, remote_get_command
,
14852 _("Copy a remote file to the local system."),
14855 add_cmd ("delete", class_files
, remote_delete_command
,
14856 _("Delete a remote file."),
14859 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14860 &remote_exec_file_var
, _("\
14861 Set the remote pathname for \"run\"."), _("\
14862 Show the remote pathname for \"run\"."), NULL
,
14863 set_remote_exec_file
,
14864 show_remote_exec_file
,
14865 &remote_set_cmdlist
,
14866 &remote_show_cmdlist
);
14868 add_setshow_boolean_cmd ("range-stepping", class_run
,
14869 &use_range_stepping
, _("\
14870 Enable or disable range stepping."), _("\
14871 Show whether target-assisted range stepping is enabled."), _("\
14872 If on, and the target supports it, when stepping a source line, GDB\n\
14873 tells the target to step the corresponding range of addresses itself instead\n\
14874 of issuing multiple single-steps. This speeds up source level\n\
14875 stepping. If off, GDB always issues single-steps, even if range\n\
14876 stepping is supported by the target. The default is on."),
14877 set_range_stepping
,
14878 show_range_stepping
,
14882 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
14883 Set watchdog timer."), _("\
14884 Show watchdog timer."), _("\
14885 When non-zero, this timeout is used instead of waiting forever for a target\n\
14886 to finish a low-level step or continue operation. If the specified amount\n\
14887 of time passes without a response from the target, an error occurs."),
14890 &setlist
, &showlist
);
14892 add_setshow_zuinteger_unlimited_cmd ("remote-packet-max-chars", no_class
,
14893 &remote_packet_max_chars
, _("\
14894 Set the maximum number of characters to display for each remote packet."), _("\
14895 Show the maximum number of characters to display for each remote packet."), _("\
14896 Specify \"unlimited\" to display all the characters."),
14897 NULL
, show_remote_packet_max_chars
,
14898 &setdebuglist
, &showdebuglist
);
14900 /* Eventually initialize fileio. See fileio.c */
14901 initialize_remote_fileio (&remote_set_cmdlist
, &remote_show_cmdlist
);