1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
30 #include "process-stratum-target.h"
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
39 #include "observable.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "gdbsupport/filestuff.h"
46 #include "gdbsupport/rsp-low.h"
50 #include "gdbsupport/gdb_sys_time.h"
52 #include "gdbsupport/event-loop.h"
53 #include "event-top.h"
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
71 #include "gdbsupport/agent.h"
73 #include "record-btrace.h"
75 #include "gdbsupport/scoped_restore.h"
76 #include "gdbsupport/environ.h"
77 #include "gdbsupport/byte-vector.h"
78 #include "gdbsupport/search.h"
80 #include <unordered_map>
81 #include "async-event.h"
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.).");
92 bool remote_debug
= false;
94 #define OPAQUETHREADBYTES 8
96 /* a 64 bit opaque identifier */
97 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
99 struct gdb_ext_thread_info
;
100 struct threads_listing_context
;
101 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
102 struct protocol_feature
;
106 typedef std::unique_ptr
<stop_reply
> stop_reply_up
;
108 /* Generic configuration support for packets the stub optionally
109 supports. Allows the user to specify the use of the packet as well
110 as allowing GDB to auto-detect support in the remote stub. */
114 PACKET_SUPPORT_UNKNOWN
= 0,
119 /* Analyze a packet's return value and update the packet config
129 struct threads_listing_context
;
131 /* Stub vCont actions support.
133 Each field is a boolean flag indicating whether the stub reports
134 support for the corresponding action. */
136 struct vCont_action_support
151 /* About this many threadids fit in a packet. */
153 #define MAXTHREADLISTRESULTS 32
155 /* Data for the vFile:pread readahead cache. */
157 struct readahead_cache
159 /* Invalidate the readahead cache. */
162 /* Invalidate the readahead cache if it is holding data for FD. */
163 void invalidate_fd (int fd
);
165 /* Serve pread from the readahead cache. Returns number of bytes
166 read, or 0 if the request can't be served from the cache. */
167 int pread (int fd
, gdb_byte
*read_buf
, size_t len
, ULONGEST offset
);
169 /* The file descriptor for the file that is being cached. -1 if the
173 /* The offset into the file that the cache buffer corresponds
177 /* The buffer holding the cache contents. */
178 gdb_byte
*buf
= nullptr;
179 /* The buffer's size. We try to read as much as fits into a packet
183 /* Cache hit and miss counters. */
184 ULONGEST hit_count
= 0;
185 ULONGEST miss_count
= 0;
188 /* Description of the remote protocol for a given architecture. */
192 long offset
; /* Offset into G packet. */
193 long regnum
; /* GDB's internal register number. */
194 LONGEST pnum
; /* Remote protocol register number. */
195 int in_g_packet
; /* Always part of G packet. */
196 /* long size in bytes; == register_size (target_gdbarch (), regnum);
198 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
202 struct remote_arch_state
204 explicit remote_arch_state (struct gdbarch
*gdbarch
);
206 /* Description of the remote protocol registers. */
207 long sizeof_g_packet
;
209 /* Description of the remote protocol registers indexed by REGNUM
210 (making an array gdbarch_num_regs in size). */
211 std::unique_ptr
<packet_reg
[]> regs
;
213 /* This is the size (in chars) of the first response to the ``g''
214 packet. It is used as a heuristic when determining the maximum
215 size of memory-read and memory-write packets. A target will
216 typically only reserve a buffer large enough to hold the ``g''
217 packet. The size does not include packet overhead (headers and
219 long actual_register_packet_size
;
221 /* This is the maximum size (in chars) of a non read/write packet.
222 It is also used as a cap on the size of read/write packets. */
223 long remote_packet_size
;
226 /* Description of the remote protocol state for the currently
227 connected target. This is per-target state, and independent of the
228 selected architecture. */
237 /* Get the remote arch state for GDBARCH. */
238 struct remote_arch_state
*get_remote_arch_state (struct gdbarch
*gdbarch
);
242 /* A buffer to use for incoming packets, and its current size. The
243 buffer is grown dynamically for larger incoming packets.
244 Outgoing packets may also be constructed in this buffer.
245 The size of the buffer is always at least REMOTE_PACKET_SIZE;
246 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
248 gdb::char_vector buf
;
250 /* True if we're going through initial connection setup (finding out
251 about the remote side's threads, relocating symbols, etc.). */
252 bool starting_up
= false;
254 /* If we negotiated packet size explicitly (and thus can bypass
255 heuristics for the largest packet size that will not overflow
256 a buffer in the stub), this will be set to that packet size.
257 Otherwise zero, meaning to use the guessed size. */
258 long explicit_packet_size
= 0;
260 /* remote_wait is normally called when the target is running and
261 waits for a stop reply packet. But sometimes we need to call it
262 when the target is already stopped. We can send a "?" packet
263 and have remote_wait read the response. Or, if we already have
264 the response, we can stash it in BUF and tell remote_wait to
265 skip calling getpkt. This flag is set when BUF contains a
266 stop reply packet and the target is not waiting. */
267 int cached_wait_status
= 0;
269 /* True, if in no ack mode. That is, neither GDB nor the stub will
270 expect acks from each other. The connection is assumed to be
272 bool noack_mode
= false;
274 /* True if we're connected in extended remote mode. */
275 bool extended
= false;
277 /* True if we resumed the target and we're waiting for the target to
278 stop. In the mean time, we can't start another command/query.
279 The remote server wouldn't be ready to process it, so we'd
280 timeout waiting for a reply that would never come and eventually
281 we'd close the connection. This can happen in asynchronous mode
282 because we allow GDB commands while the target is running. */
283 bool waiting_for_stop_reply
= false;
285 /* The status of the stub support for the various vCont actions. */
286 vCont_action_support supports_vCont
;
287 /* Whether vCont support was probed already. This is a workaround
288 until packet_support is per-connection. */
289 bool supports_vCont_probed
;
291 /* True if the user has pressed Ctrl-C, but the target hasn't
292 responded to that. */
293 bool ctrlc_pending_p
= false;
295 /* True if we saw a Ctrl-C while reading or writing from/to the
296 remote descriptor. At that point it is not safe to send a remote
297 interrupt packet, so we instead remember we saw the Ctrl-C and
298 process it once we're done with sending/receiving the current
299 packet, which should be shortly. If however that takes too long,
300 and the user presses Ctrl-C again, we offer to disconnect. */
301 bool got_ctrlc_during_io
= false;
303 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
304 remote_open knows that we don't have a file open when the program
306 struct serial
*remote_desc
= nullptr;
308 /* These are the threads which we last sent to the remote system. The
309 TID member will be -1 for all or -2 for not sent yet. */
310 ptid_t general_thread
= null_ptid
;
311 ptid_t continue_thread
= null_ptid
;
313 /* This is the traceframe which we last selected on the remote system.
314 It will be -1 if no traceframe is selected. */
315 int remote_traceframe_number
= -1;
317 char *last_pass_packet
= nullptr;
319 /* The last QProgramSignals packet sent to the target. We bypass
320 sending a new program signals list down to the target if the new
321 packet is exactly the same as the last we sent. IOW, we only let
322 the target know about program signals list changes. */
323 char *last_program_signals_packet
= nullptr;
325 gdb_signal last_sent_signal
= GDB_SIGNAL_0
;
327 bool last_sent_step
= false;
329 /* The execution direction of the last resume we got. */
330 exec_direction_kind last_resume_exec_dir
= EXEC_FORWARD
;
332 char *finished_object
= nullptr;
333 char *finished_annex
= nullptr;
334 ULONGEST finished_offset
= 0;
336 /* Should we try the 'ThreadInfo' query packet?
338 This variable (NOT available to the user: auto-detect only!)
339 determines whether GDB will use the new, simpler "ThreadInfo"
340 query or the older, more complex syntax for thread queries.
341 This is an auto-detect variable (set to true at each connect,
342 and set to false when the target fails to recognize it). */
343 bool use_threadinfo_query
= false;
344 bool use_threadextra_query
= false;
346 threadref echo_nextthread
{};
347 threadref nextthread
{};
348 threadref resultthreadlist
[MAXTHREADLISTRESULTS
] {};
350 /* The state of remote notification. */
351 struct remote_notif_state
*notif_state
= nullptr;
353 /* The branch trace configuration. */
354 struct btrace_config btrace_config
{};
356 /* The argument to the last "vFile:setfs:" packet we sent, used
357 to avoid sending repeated unnecessary "vFile:setfs:" packets.
358 Initialized to -1 to indicate that no "vFile:setfs:" packet
359 has yet been sent. */
362 /* A readahead cache for vFile:pread. Often, reading a binary
363 involves a sequence of small reads. E.g., when parsing an ELF
364 file. A readahead cache helps mostly the case of remote
365 debugging on a connection with higher latency, due to the
366 request/reply nature of the RSP. We only cache data for a single
367 file descriptor at a time. */
368 struct readahead_cache readahead_cache
;
370 /* The list of already fetched and acknowledged stop events. This
371 queue is used for notification Stop, and other notifications
372 don't need queue for their events, because the notification
373 events of Stop can't be consumed immediately, so that events
374 should be queued first, and be consumed by remote_wait_{ns,as}
375 one per time. Other notifications can consume their events
376 immediately, so queue is not needed for them. */
377 std::vector
<stop_reply_up
> stop_reply_queue
;
379 /* Asynchronous signal handle registered as event loop source for
380 when we have pending events ready to be passed to the core. */
381 struct async_event_handler
*remote_async_inferior_event_token
= nullptr;
383 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
384 ``forever'' still use the normal timeout mechanism. This is
385 currently used by the ASYNC code to guarentee that target reads
386 during the initial connect always time-out. Once getpkt has been
387 modified to return a timeout indication and, in turn
388 remote_wait()/wait_for_inferior() have gained a timeout parameter
390 int wait_forever_enabled_p
= 1;
393 /* Mapping of remote protocol data for each gdbarch. Usually there
394 is only one entry here, though we may see more with stubs that
395 support multi-process. */
396 std::unordered_map
<struct gdbarch
*, remote_arch_state
>
400 static const target_info remote_target_info
= {
402 N_("Remote serial target in gdb-specific protocol"),
406 class remote_target
: public process_stratum_target
409 remote_target () = default;
410 ~remote_target () override
;
412 const target_info
&info () const override
413 { return remote_target_info
; }
415 const char *connection_string () override
;
417 thread_control_capabilities
get_thread_control_capabilities () override
418 { return tc_schedlock
; }
420 /* Open a remote connection. */
421 static void open (const char *, int);
423 void close () override
;
425 void detach (inferior
*, int) override
;
426 void disconnect (const char *, int) override
;
428 void commit_resume () override
;
429 void resume (ptid_t
, int, enum gdb_signal
) override
;
430 ptid_t
wait (ptid_t
, struct target_waitstatus
*, target_wait_flags
) override
;
432 void fetch_registers (struct regcache
*, int) override
;
433 void store_registers (struct regcache
*, int) override
;
434 void prepare_to_store (struct regcache
*) override
;
436 void files_info () override
;
438 int insert_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
440 int remove_breakpoint (struct gdbarch
*, struct bp_target_info
*,
441 enum remove_bp_reason
) override
;
444 bool stopped_by_sw_breakpoint () override
;
445 bool supports_stopped_by_sw_breakpoint () override
;
447 bool stopped_by_hw_breakpoint () override
;
449 bool supports_stopped_by_hw_breakpoint () override
;
451 bool stopped_by_watchpoint () override
;
453 bool stopped_data_address (CORE_ADDR
*) override
;
455 bool watchpoint_addr_within_range (CORE_ADDR
, CORE_ADDR
, int) override
;
457 int can_use_hw_breakpoint (enum bptype
, int, int) override
;
459 int insert_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
461 int remove_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
463 int region_ok_for_hw_watchpoint (CORE_ADDR
, int) override
;
465 int insert_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
466 struct expression
*) override
;
468 int remove_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
469 struct expression
*) override
;
471 void kill () override
;
473 void load (const char *, int) override
;
475 void mourn_inferior () override
;
477 void pass_signals (gdb::array_view
<const unsigned char>) override
;
479 int set_syscall_catchpoint (int, bool, int,
480 gdb::array_view
<const int>) override
;
482 void program_signals (gdb::array_view
<const unsigned char>) override
;
484 bool thread_alive (ptid_t ptid
) override
;
486 const char *thread_name (struct thread_info
*) override
;
488 void update_thread_list () override
;
490 std::string
pid_to_str (ptid_t
) override
;
492 const char *extra_thread_info (struct thread_info
*) override
;
494 ptid_t
get_ada_task_ptid (long lwp
, long thread
) override
;
496 thread_info
*thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
498 inferior
*inf
) override
;
500 gdb::byte_vector
thread_info_to_thread_handle (struct thread_info
*tp
)
503 void stop (ptid_t
) override
;
505 void interrupt () override
;
507 void pass_ctrlc () override
;
509 enum target_xfer_status
xfer_partial (enum target_object object
,
512 const gdb_byte
*writebuf
,
513 ULONGEST offset
, ULONGEST len
,
514 ULONGEST
*xfered_len
) override
;
516 ULONGEST
get_memory_xfer_limit () override
;
518 void rcmd (const char *command
, struct ui_file
*output
) override
;
520 char *pid_to_exec_file (int pid
) override
;
522 void log_command (const char *cmd
) override
524 serial_log_command (this, cmd
);
527 CORE_ADDR
get_thread_local_address (ptid_t ptid
,
528 CORE_ADDR load_module_addr
,
529 CORE_ADDR offset
) override
;
531 bool can_execute_reverse () override
;
533 std::vector
<mem_region
> memory_map () override
;
535 void flash_erase (ULONGEST address
, LONGEST length
) override
;
537 void flash_done () override
;
539 const struct target_desc
*read_description () override
;
541 int search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
542 const gdb_byte
*pattern
, ULONGEST pattern_len
,
543 CORE_ADDR
*found_addrp
) override
;
545 bool can_async_p () override
;
547 bool is_async_p () override
;
549 void async (int) override
;
551 int async_wait_fd () override
;
553 void thread_events (int) override
;
555 int can_do_single_step () override
;
557 void terminal_inferior () override
;
559 void terminal_ours () override
;
561 bool supports_non_stop () override
;
563 bool supports_multi_process () override
;
565 bool supports_disable_randomization () override
;
567 bool filesystem_is_local () override
;
570 int fileio_open (struct inferior
*inf
, const char *filename
,
571 int flags
, int mode
, int warn_if_slow
,
572 int *target_errno
) override
;
574 int fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
575 ULONGEST offset
, int *target_errno
) override
;
577 int fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
578 ULONGEST offset
, int *target_errno
) override
;
580 int fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
) override
;
582 int fileio_close (int fd
, int *target_errno
) override
;
584 int fileio_unlink (struct inferior
*inf
,
585 const char *filename
,
586 int *target_errno
) override
;
588 gdb::optional
<std::string
>
589 fileio_readlink (struct inferior
*inf
,
590 const char *filename
,
591 int *target_errno
) override
;
593 bool supports_enable_disable_tracepoint () override
;
595 bool supports_string_tracing () override
;
597 bool supports_evaluation_of_breakpoint_conditions () override
;
599 bool can_run_breakpoint_commands () override
;
601 void trace_init () override
;
603 void download_tracepoint (struct bp_location
*location
) override
;
605 bool can_download_tracepoint () override
;
607 void download_trace_state_variable (const trace_state_variable
&tsv
) override
;
609 void enable_tracepoint (struct bp_location
*location
) override
;
611 void disable_tracepoint (struct bp_location
*location
) override
;
613 void trace_set_readonly_regions () override
;
615 void trace_start () override
;
617 int get_trace_status (struct trace_status
*ts
) override
;
619 void get_tracepoint_status (struct breakpoint
*tp
, struct uploaded_tp
*utp
)
622 void trace_stop () override
;
624 int trace_find (enum trace_find_type type
, int num
,
625 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
) override
;
627 bool get_trace_state_variable_value (int tsv
, LONGEST
*val
) override
;
629 int save_trace_data (const char *filename
) override
;
631 int upload_tracepoints (struct uploaded_tp
**utpp
) override
;
633 int upload_trace_state_variables (struct uploaded_tsv
**utsvp
) override
;
635 LONGEST
get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
) override
;
637 int get_min_fast_tracepoint_insn_len () override
;
639 void set_disconnected_tracing (int val
) override
;
641 void set_circular_trace_buffer (int val
) override
;
643 void set_trace_buffer_size (LONGEST val
) override
;
645 bool set_trace_notes (const char *user
, const char *notes
,
646 const char *stopnotes
) override
;
648 int core_of_thread (ptid_t ptid
) override
;
650 int verify_memory (const gdb_byte
*data
,
651 CORE_ADDR memaddr
, ULONGEST size
) override
;
654 bool get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
) override
;
656 void set_permissions () override
;
658 bool static_tracepoint_marker_at (CORE_ADDR
,
659 struct static_tracepoint_marker
*marker
)
662 std::vector
<static_tracepoint_marker
>
663 static_tracepoint_markers_by_strid (const char *id
) override
;
665 traceframe_info_up
traceframe_info () override
;
667 bool use_agent (bool use
) override
;
668 bool can_use_agent () override
;
670 struct btrace_target_info
*enable_btrace (ptid_t ptid
,
671 const struct btrace_config
*conf
) override
;
673 void disable_btrace (struct btrace_target_info
*tinfo
) override
;
675 void teardown_btrace (struct btrace_target_info
*tinfo
) override
;
677 enum btrace_error
read_btrace (struct btrace_data
*data
,
678 struct btrace_target_info
*btinfo
,
679 enum btrace_read_type type
) override
;
681 const struct btrace_config
*btrace_conf (const struct btrace_target_info
*) override
;
682 bool augmented_libraries_svr4_read () override
;
683 bool follow_fork (bool, bool) override
;
684 void follow_exec (struct inferior
*, const char *) override
;
685 int insert_fork_catchpoint (int) override
;
686 int remove_fork_catchpoint (int) override
;
687 int insert_vfork_catchpoint (int) override
;
688 int remove_vfork_catchpoint (int) override
;
689 int insert_exec_catchpoint (int) override
;
690 int remove_exec_catchpoint (int) override
;
691 enum exec_direction_kind
execution_direction () override
;
693 bool supports_memory_tagging () override
;
695 bool fetch_memtags (CORE_ADDR address
, size_t len
,
696 gdb::byte_vector
&tags
, int type
) override
;
698 bool store_memtags (CORE_ADDR address
, size_t len
,
699 const gdb::byte_vector
&tags
, int type
) override
;
701 public: /* Remote specific methods. */
703 void remote_download_command_source (int num
, ULONGEST addr
,
704 struct command_line
*cmds
);
706 void remote_file_put (const char *local_file
, const char *remote_file
,
708 void remote_file_get (const char *remote_file
, const char *local_file
,
710 void remote_file_delete (const char *remote_file
, int from_tty
);
712 int remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
713 ULONGEST offset
, int *remote_errno
);
714 int remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
715 ULONGEST offset
, int *remote_errno
);
716 int remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
717 ULONGEST offset
, int *remote_errno
);
719 int remote_hostio_send_command (int command_bytes
, int which_packet
,
720 int *remote_errno
, const char **attachment
,
721 int *attachment_len
);
722 int remote_hostio_set_filesystem (struct inferior
*inf
,
724 /* We should get rid of this and use fileio_open directly. */
725 int remote_hostio_open (struct inferior
*inf
, const char *filename
,
726 int flags
, int mode
, int warn_if_slow
,
728 int remote_hostio_close (int fd
, int *remote_errno
);
730 int remote_hostio_unlink (inferior
*inf
, const char *filename
,
733 struct remote_state
*get_remote_state ();
735 long get_remote_packet_size (void);
736 long get_memory_packet_size (struct memory_packet_config
*config
);
738 long get_memory_write_packet_size ();
739 long get_memory_read_packet_size ();
741 char *append_pending_thread_resumptions (char *p
, char *endp
,
743 static void open_1 (const char *name
, int from_tty
, int extended_p
);
744 void start_remote (int from_tty
, int extended_p
);
745 void remote_detach_1 (struct inferior
*inf
, int from_tty
);
747 char *append_resumption (char *p
, char *endp
,
748 ptid_t ptid
, int step
, gdb_signal siggnal
);
749 int remote_resume_with_vcont (ptid_t ptid
, int step
,
752 thread_info
*add_current_inferior_and_thread (const char *wait_status
);
754 ptid_t
wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
755 target_wait_flags options
);
756 ptid_t
wait_as (ptid_t ptid
, target_waitstatus
*status
,
757 target_wait_flags options
);
759 ptid_t
process_stop_reply (struct stop_reply
*stop_reply
,
760 target_waitstatus
*status
);
762 ptid_t select_thread_for_ambiguous_stop_reply
763 (const struct target_waitstatus
*status
);
765 void remote_notice_new_inferior (ptid_t currthread
, int executing
);
767 void process_initial_stop_replies (int from_tty
);
769 thread_info
*remote_add_thread (ptid_t ptid
, bool running
, bool executing
);
771 void btrace_sync_conf (const btrace_config
*conf
);
773 void remote_btrace_maybe_reopen ();
775 void remove_new_fork_children (threads_listing_context
*context
);
776 void kill_new_fork_children (int pid
);
777 void discard_pending_stop_replies (struct inferior
*inf
);
778 int stop_reply_queue_length ();
780 void check_pending_events_prevent_wildcard_vcont
781 (int *may_global_wildcard_vcont
);
783 void discard_pending_stop_replies_in_queue ();
784 struct stop_reply
*remote_notif_remove_queued_reply (ptid_t ptid
);
785 struct stop_reply
*queued_stop_reply (ptid_t ptid
);
786 int peek_stop_reply (ptid_t ptid
);
787 void remote_parse_stop_reply (const char *buf
, stop_reply
*event
);
789 void remote_stop_ns (ptid_t ptid
);
790 void remote_interrupt_as ();
791 void remote_interrupt_ns ();
793 char *remote_get_noisy_reply ();
794 int remote_query_attached (int pid
);
795 inferior
*remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
798 ptid_t
remote_current_thread (ptid_t oldpid
);
799 ptid_t
get_current_thread (const char *wait_status
);
801 void set_thread (ptid_t ptid
, int gen
);
802 void set_general_thread (ptid_t ptid
);
803 void set_continue_thread (ptid_t ptid
);
804 void set_general_process ();
806 char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
808 int remote_unpack_thread_info_response (const char *pkt
, threadref
*expectedref
,
809 gdb_ext_thread_info
*info
);
810 int remote_get_threadinfo (threadref
*threadid
, int fieldset
,
811 gdb_ext_thread_info
*info
);
813 int parse_threadlist_response (const char *pkt
, int result_limit
,
814 threadref
*original_echo
,
815 threadref
*resultlist
,
817 int remote_get_threadlist (int startflag
, threadref
*nextthread
,
818 int result_limit
, int *done
, int *result_count
,
819 threadref
*threadlist
);
821 int remote_threadlist_iterator (rmt_thread_action stepfunction
,
822 void *context
, int looplimit
);
824 int remote_get_threads_with_ql (threads_listing_context
*context
);
825 int remote_get_threads_with_qxfer (threads_listing_context
*context
);
826 int remote_get_threads_with_qthreadinfo (threads_listing_context
*context
);
828 void extended_remote_restart ();
832 void remote_check_symbols ();
834 void remote_supported_packet (const struct protocol_feature
*feature
,
835 enum packet_support support
,
836 const char *argument
);
838 void remote_query_supported ();
840 void remote_packet_size (const protocol_feature
*feature
,
841 packet_support support
, const char *value
);
843 void remote_serial_quit_handler ();
845 void remote_detach_pid (int pid
);
847 void remote_vcont_probe ();
849 void remote_resume_with_hc (ptid_t ptid
, int step
,
852 void send_interrupt_sequence ();
853 void interrupt_query ();
855 void remote_notif_get_pending_events (notif_client
*nc
);
857 int fetch_register_using_p (struct regcache
*regcache
,
859 int send_g_packet ();
860 void process_g_packet (struct regcache
*regcache
);
861 void fetch_registers_using_g (struct regcache
*regcache
);
862 int store_register_using_P (const struct regcache
*regcache
,
864 void store_registers_using_G (const struct regcache
*regcache
);
866 void set_remote_traceframe ();
868 void check_binary_download (CORE_ADDR addr
);
870 target_xfer_status
remote_write_bytes_aux (const char *header
,
872 const gdb_byte
*myaddr
,
875 ULONGEST
*xfered_len_units
,
879 target_xfer_status
remote_write_bytes (CORE_ADDR memaddr
,
880 const gdb_byte
*myaddr
, ULONGEST len
,
881 int unit_size
, ULONGEST
*xfered_len
);
883 target_xfer_status
remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
885 int unit_size
, ULONGEST
*xfered_len_units
);
887 target_xfer_status
remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
891 ULONGEST
*xfered_len
);
893 target_xfer_status
remote_read_bytes (CORE_ADDR memaddr
,
894 gdb_byte
*myaddr
, ULONGEST len
,
896 ULONGEST
*xfered_len
);
898 packet_result
remote_send_printf (const char *format
, ...)
899 ATTRIBUTE_PRINTF (2, 3);
901 target_xfer_status
remote_flash_write (ULONGEST address
,
902 ULONGEST length
, ULONGEST
*xfered_len
,
903 const gdb_byte
*data
);
905 int readchar (int timeout
);
907 void remote_serial_write (const char *str
, int len
);
909 int putpkt (const char *buf
);
910 int putpkt_binary (const char *buf
, int cnt
);
912 int putpkt (const gdb::char_vector
&buf
)
914 return putpkt (buf
.data ());
918 long read_frame (gdb::char_vector
*buf_p
);
919 void getpkt (gdb::char_vector
*buf
, int forever
);
920 int getpkt_or_notif_sane_1 (gdb::char_vector
*buf
, int forever
,
921 int expecting_notif
, int *is_notif
);
922 int getpkt_sane (gdb::char_vector
*buf
, int forever
);
923 int getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
925 int remote_vkill (int pid
);
926 void remote_kill_k ();
928 void extended_remote_disable_randomization (int val
);
929 int extended_remote_run (const std::string
&args
);
931 void send_environment_packet (const char *action
,
935 void extended_remote_environment_support ();
936 void extended_remote_set_inferior_cwd ();
938 target_xfer_status
remote_write_qxfer (const char *object_name
,
940 const gdb_byte
*writebuf
,
941 ULONGEST offset
, LONGEST len
,
942 ULONGEST
*xfered_len
,
943 struct packet_config
*packet
);
945 target_xfer_status
remote_read_qxfer (const char *object_name
,
947 gdb_byte
*readbuf
, ULONGEST offset
,
949 ULONGEST
*xfered_len
,
950 struct packet_config
*packet
);
952 void push_stop_reply (struct stop_reply
*new_event
);
954 bool vcont_r_supported ();
956 void packet_command (const char *args
, int from_tty
);
958 private: /* data fields */
960 /* The remote state. Don't reference this directly. Use the
961 get_remote_state method instead. */
962 remote_state m_remote_state
;
965 static const target_info extended_remote_target_info
= {
967 N_("Extended remote serial target in gdb-specific protocol"),
971 /* Set up the extended remote target by extending the standard remote
972 target and adding to it. */
974 class extended_remote_target final
: public remote_target
977 const target_info
&info () const override
978 { return extended_remote_target_info
; }
980 /* Open an extended-remote connection. */
981 static void open (const char *, int);
983 bool can_create_inferior () override
{ return true; }
984 void create_inferior (const char *, const std::string
&,
985 char **, int) override
;
987 void detach (inferior
*, int) override
;
989 bool can_attach () override
{ return true; }
990 void attach (const char *, int) override
;
992 void post_attach (int) override
;
993 bool supports_disable_randomization () override
;
996 /* Per-program-space data key. */
997 static const struct program_space_key
<char, gdb::xfree_deleter
<char>>
1000 /* The variable registered as the control variable used by the
1001 remote exec-file commands. While the remote exec-file setting is
1002 per-program-space, the set/show machinery uses this as the
1003 location of the remote exec-file value. */
1004 static char *remote_exec_file_var
;
1006 /* The size to align memory write packets, when practical. The protocol
1007 does not guarantee any alignment, and gdb will generate short
1008 writes and unaligned writes, but even as a best-effort attempt this
1009 can improve bulk transfers. For instance, if a write is misaligned
1010 relative to the target's data bus, the stub may need to make an extra
1011 round trip fetching data from the target. This doesn't make a
1012 huge difference, but it's easy to do, so we try to be helpful.
1014 The alignment chosen is arbitrary; usually data bus width is
1015 important here, not the possibly larger cache line size. */
1016 enum { REMOTE_ALIGN_WRITES
= 16 };
1018 /* Prototypes for local functions. */
1020 static int hexnumlen (ULONGEST num
);
1022 static int stubhex (int ch
);
1024 static int hexnumstr (char *, ULONGEST
);
1026 static int hexnumnstr (char *, ULONGEST
, int);
1028 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
1030 static void print_packet (const char *);
1032 static int stub_unpack_int (const char *buff
, int fieldlength
);
1034 struct packet_config
;
1036 static void show_packet_config_cmd (struct packet_config
*config
);
1038 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
1040 struct cmd_list_element
*c
,
1043 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
1045 static void remote_async_inferior_event_handler (gdb_client_data
);
1047 static bool remote_read_description_p (struct target_ops
*target
);
1049 static void remote_console_output (const char *msg
);
1051 static void remote_btrace_reset (remote_state
*rs
);
1053 static void remote_unpush_and_throw (remote_target
*target
);
1057 static struct cmd_list_element
*remote_cmdlist
;
1059 /* For "set remote" and "show remote". */
1061 static struct cmd_list_element
*remote_set_cmdlist
;
1062 static struct cmd_list_element
*remote_show_cmdlist
;
1064 /* Controls whether GDB is willing to use range stepping. */
1066 static bool use_range_stepping
= true;
1068 /* From the remote target's point of view, each thread is in one of these three
1070 enum class resume_state
1072 /* Not resumed - we haven't been asked to resume this thread. */
1075 /* We have been asked to resume this thread, but haven't sent a vCont action
1076 for it yet. We'll need to consider it next time commit_resume is
1078 RESUMED_PENDING_VCONT
,
1080 /* We have been asked to resume this thread, and we have sent a vCont action
1085 /* Information about a thread's pending vCont-resume. Used when a thread is in
1086 the remote_resume_state::RESUMED_PENDING_VCONT state. remote_target::resume
1087 stores this information which is then picked up by
1088 remote_target::commit_resume to know which is the proper action for this
1089 thread to include in the vCont packet. */
1090 struct resumed_pending_vcont_info
1092 /* True if the last resume call for this thread was a step request, false
1093 if a continue request. */
1096 /* The signal specified in the last resume call for this thread. */
1100 /* Private data that we'll store in (struct thread_info)->priv. */
1101 struct remote_thread_info
: public private_thread_info
1107 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1108 sequence of bytes. */
1109 gdb::byte_vector thread_handle
;
1111 /* Whether the target stopped for a breakpoint/watchpoint. */
1112 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1114 /* This is set to the data address of the access causing the target
1115 to stop for a watchpoint. */
1116 CORE_ADDR watch_data_address
= 0;
1118 /* Get the thread's resume state. */
1119 enum resume_state
get_resume_state () const
1121 return m_resume_state
;
1124 /* Put the thread in the NOT_RESUMED state. */
1125 void set_not_resumed ()
1127 m_resume_state
= resume_state::NOT_RESUMED
;
1130 /* Put the thread in the RESUMED_PENDING_VCONT state. */
1131 void set_resumed_pending_vcont (bool step
, gdb_signal sig
)
1133 m_resume_state
= resume_state::RESUMED_PENDING_VCONT
;
1134 m_resumed_pending_vcont_info
.step
= step
;
1135 m_resumed_pending_vcont_info
.sig
= sig
;
1138 /* Get the information this thread's pending vCont-resumption.
1140 Must only be called if the thread is in the RESUMED_PENDING_VCONT resume
1142 const struct resumed_pending_vcont_info
&resumed_pending_vcont_info () const
1144 gdb_assert (m_resume_state
== resume_state::RESUMED_PENDING_VCONT
);
1146 return m_resumed_pending_vcont_info
;
1149 /* Put the thread in the VCONT_RESUMED state. */
1152 m_resume_state
= resume_state::RESUMED
;
1156 /* Resume state for this thread. This is used to implement vCont action
1157 coalescing (only when the target operates in non-stop mode).
1159 remote_target::resume moves the thread to the RESUMED_PENDING_VCONT state,
1160 which notes that this thread must be considered in the next commit_resume
1163 remote_target::commit_resume sends a vCont packet with actions for the
1164 threads in the RESUMED_PENDING_VCONT state and moves them to the
1165 VCONT_RESUMED state.
1167 When reporting a stop to the core for a thread, that thread is moved back
1168 to the NOT_RESUMED state. */
1169 enum resume_state m_resume_state
= resume_state::NOT_RESUMED
;
1171 /* Extra info used if the thread is in the RESUMED_PENDING_VCONT state. */
1172 struct resumed_pending_vcont_info m_resumed_pending_vcont_info
;
1175 remote_state::remote_state ()
1180 remote_state::~remote_state ()
1182 xfree (this->last_pass_packet
);
1183 xfree (this->last_program_signals_packet
);
1184 xfree (this->finished_object
);
1185 xfree (this->finished_annex
);
1188 /* Utility: generate error from an incoming stub packet. */
1190 trace_error (char *buf
)
1193 return; /* not an error msg */
1196 case '1': /* malformed packet error */
1197 if (*++buf
== '0') /* general case: */
1198 error (_("remote.c: error in outgoing packet."));
1200 error (_("remote.c: error in outgoing packet at field #%ld."),
1201 strtol (buf
, NULL
, 16));
1203 error (_("Target returns error code '%s'."), buf
);
1207 /* Utility: wait for reply from stub, while accepting "O" packets. */
1210 remote_target::remote_get_noisy_reply ()
1212 struct remote_state
*rs
= get_remote_state ();
1214 do /* Loop on reply from remote stub. */
1218 QUIT
; /* Allow user to bail out with ^C. */
1219 getpkt (&rs
->buf
, 0);
1220 buf
= rs
->buf
.data ();
1223 else if (startswith (buf
, "qRelocInsn:"))
1226 CORE_ADDR from
, to
, org_to
;
1228 int adjusted_size
= 0;
1231 p
= buf
+ strlen ("qRelocInsn:");
1232 pp
= unpack_varlen_hex (p
, &ul
);
1234 error (_("invalid qRelocInsn packet: %s"), buf
);
1238 unpack_varlen_hex (p
, &ul
);
1245 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
1248 catch (const gdb_exception
&ex
)
1250 if (ex
.error
== MEMORY_ERROR
)
1252 /* Propagate memory errors silently back to the
1253 target. The stub may have limited the range of
1254 addresses we can write to, for example. */
1258 /* Something unexpectedly bad happened. Be verbose
1259 so we can tell what, and propagate the error back
1260 to the stub, so it doesn't get stuck waiting for
1262 exception_fprintf (gdb_stderr
, ex
,
1263 _("warning: relocating instruction: "));
1270 adjusted_size
= to
- org_to
;
1272 xsnprintf (buf
, rs
->buf
.size (), "qRelocInsn:%x", adjusted_size
);
1276 else if (buf
[0] == 'O' && buf
[1] != 'K')
1277 remote_console_output (buf
+ 1); /* 'O' message from stub */
1279 return buf
; /* Here's the actual reply. */
1284 struct remote_arch_state
*
1285 remote_state::get_remote_arch_state (struct gdbarch
*gdbarch
)
1287 remote_arch_state
*rsa
;
1289 auto it
= this->m_arch_states
.find (gdbarch
);
1290 if (it
== this->m_arch_states
.end ())
1292 auto p
= this->m_arch_states
.emplace (std::piecewise_construct
,
1293 std::forward_as_tuple (gdbarch
),
1294 std::forward_as_tuple (gdbarch
));
1295 rsa
= &p
.first
->second
;
1297 /* Make sure that the packet buffer is plenty big enough for
1298 this architecture. */
1299 if (this->buf
.size () < rsa
->remote_packet_size
)
1300 this->buf
.resize (2 * rsa
->remote_packet_size
);
1308 /* Fetch the global remote target state. */
1311 remote_target::get_remote_state ()
1313 /* Make sure that the remote architecture state has been
1314 initialized, because doing so might reallocate rs->buf. Any
1315 function which calls getpkt also needs to be mindful of changes
1316 to rs->buf, but this call limits the number of places which run
1318 m_remote_state
.get_remote_arch_state (target_gdbarch ());
1320 return &m_remote_state
;
1323 /* Fetch the remote exec-file from the current program space. */
1326 get_remote_exec_file (void)
1328 char *remote_exec_file
;
1330 remote_exec_file
= remote_pspace_data
.get (current_program_space
);
1331 if (remote_exec_file
== NULL
)
1334 return remote_exec_file
;
1337 /* Set the remote exec file for PSPACE. */
1340 set_pspace_remote_exec_file (struct program_space
*pspace
,
1341 const char *remote_exec_file
)
1343 char *old_file
= remote_pspace_data
.get (pspace
);
1346 remote_pspace_data
.set (pspace
, xstrdup (remote_exec_file
));
1349 /* The "set/show remote exec-file" set command hook. */
1352 set_remote_exec_file (const char *ignored
, int from_tty
,
1353 struct cmd_list_element
*c
)
1355 gdb_assert (remote_exec_file_var
!= NULL
);
1356 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
1359 /* The "set/show remote exec-file" show command hook. */
1362 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
1363 struct cmd_list_element
*cmd
, const char *value
)
1365 fprintf_filtered (file
, "%s\n", get_remote_exec_file ());
1369 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
1371 int regnum
, num_remote_regs
, offset
;
1372 struct packet_reg
**remote_regs
;
1374 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
1376 struct packet_reg
*r
= ®s
[regnum
];
1378 if (register_size (gdbarch
, regnum
) == 0)
1379 /* Do not try to fetch zero-sized (placeholder) registers. */
1382 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
1387 /* Define the g/G packet format as the contents of each register
1388 with a remote protocol number, in order of ascending protocol
1391 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
1392 for (num_remote_regs
= 0, regnum
= 0;
1393 regnum
< gdbarch_num_regs (gdbarch
);
1395 if (regs
[regnum
].pnum
!= -1)
1396 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
1398 std::sort (remote_regs
, remote_regs
+ num_remote_regs
,
1399 [] (const packet_reg
*a
, const packet_reg
*b
)
1400 { return a
->pnum
< b
->pnum
; });
1402 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
1404 remote_regs
[regnum
]->in_g_packet
= 1;
1405 remote_regs
[regnum
]->offset
= offset
;
1406 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
1412 /* Given the architecture described by GDBARCH, return the remote
1413 protocol register's number and the register's offset in the g/G
1414 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1415 If the target does not have a mapping for REGNUM, return false,
1416 otherwise, return true. */
1419 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
1420 int *pnum
, int *poffset
)
1422 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
1424 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
1426 map_regcache_remote_table (gdbarch
, regs
.data ());
1428 *pnum
= regs
[regnum
].pnum
;
1429 *poffset
= regs
[regnum
].offset
;
1434 remote_arch_state::remote_arch_state (struct gdbarch
*gdbarch
)
1436 /* Use the architecture to build a regnum<->pnum table, which will be
1437 1:1 unless a feature set specifies otherwise. */
1438 this->regs
.reset (new packet_reg
[gdbarch_num_regs (gdbarch
)] ());
1440 /* Record the maximum possible size of the g packet - it may turn out
1442 this->sizeof_g_packet
1443 = map_regcache_remote_table (gdbarch
, this->regs
.get ());
1445 /* Default maximum number of characters in a packet body. Many
1446 remote stubs have a hardwired buffer size of 400 bytes
1447 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1448 as the maximum packet-size to ensure that the packet and an extra
1449 NUL character can always fit in the buffer. This stops GDB
1450 trashing stubs that try to squeeze an extra NUL into what is
1451 already a full buffer (As of 1999-12-04 that was most stubs). */
1452 this->remote_packet_size
= 400 - 1;
1454 /* This one is filled in when a ``g'' packet is received. */
1455 this->actual_register_packet_size
= 0;
1457 /* Should rsa->sizeof_g_packet needs more space than the
1458 default, adjust the size accordingly. Remember that each byte is
1459 encoded as two characters. 32 is the overhead for the packet
1460 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1461 (``$NN:G...#NN'') is a better guess, the below has been padded a
1463 if (this->sizeof_g_packet
> ((this->remote_packet_size
- 32) / 2))
1464 this->remote_packet_size
= (this->sizeof_g_packet
* 2 + 32);
1467 /* Get a pointer to the current remote target. If not connected to a
1468 remote target, return NULL. */
1470 static remote_target
*
1471 get_current_remote_target ()
1473 target_ops
*proc_target
= current_inferior ()->process_target ();
1474 return dynamic_cast<remote_target
*> (proc_target
);
1477 /* Return the current allowed size of a remote packet. This is
1478 inferred from the current architecture, and should be used to
1479 limit the length of outgoing packets. */
1481 remote_target::get_remote_packet_size ()
1483 struct remote_state
*rs
= get_remote_state ();
1484 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1486 if (rs
->explicit_packet_size
)
1487 return rs
->explicit_packet_size
;
1489 return rsa
->remote_packet_size
;
1492 static struct packet_reg
*
1493 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1496 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
1500 struct packet_reg
*r
= &rsa
->regs
[regnum
];
1502 gdb_assert (r
->regnum
== regnum
);
1507 static struct packet_reg
*
1508 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1513 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
1515 struct packet_reg
*r
= &rsa
->regs
[i
];
1517 if (r
->pnum
== pnum
)
1523 /* Allow the user to specify what sequence to send to the remote
1524 when he requests a program interruption: Although ^C is usually
1525 what remote systems expect (this is the default, here), it is
1526 sometimes preferable to send a break. On other systems such
1527 as the Linux kernel, a break followed by g, which is Magic SysRq g
1528 is required in order to interrupt the execution. */
1529 const char interrupt_sequence_control_c
[] = "Ctrl-C";
1530 const char interrupt_sequence_break
[] = "BREAK";
1531 const char interrupt_sequence_break_g
[] = "BREAK-g";
1532 static const char *const interrupt_sequence_modes
[] =
1534 interrupt_sequence_control_c
,
1535 interrupt_sequence_break
,
1536 interrupt_sequence_break_g
,
1539 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
1542 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
1543 struct cmd_list_element
*c
,
1546 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
1547 fprintf_filtered (file
,
1548 _("Send the ASCII ETX character (Ctrl-c) "
1549 "to the remote target to interrupt the "
1550 "execution of the program.\n"));
1551 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
1552 fprintf_filtered (file
,
1553 _("send a break signal to the remote target "
1554 "to interrupt the execution of the program.\n"));
1555 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
1556 fprintf_filtered (file
,
1557 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1558 "the remote target to interrupt the execution "
1559 "of Linux kernel.\n"));
1561 internal_error (__FILE__
, __LINE__
,
1562 _("Invalid value for interrupt_sequence_mode: %s."),
1563 interrupt_sequence_mode
);
1566 /* This boolean variable specifies whether interrupt_sequence is sent
1567 to the remote target when gdb connects to it.
1568 This is mostly needed when you debug the Linux kernel: The Linux kernel
1569 expects BREAK g which is Magic SysRq g for connecting gdb. */
1570 static bool interrupt_on_connect
= false;
1572 /* This variable is used to implement the "set/show remotebreak" commands.
1573 Since these commands are now deprecated in favor of "set/show remote
1574 interrupt-sequence", it no longer has any effect on the code. */
1575 static bool remote_break
;
1578 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1581 interrupt_sequence_mode
= interrupt_sequence_break
;
1583 interrupt_sequence_mode
= interrupt_sequence_control_c
;
1587 show_remotebreak (struct ui_file
*file
, int from_tty
,
1588 struct cmd_list_element
*c
,
1593 /* This variable sets the number of bits in an address that are to be
1594 sent in a memory ("M" or "m") packet. Normally, after stripping
1595 leading zeros, the entire address would be sent. This variable
1596 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1597 initial implementation of remote.c restricted the address sent in
1598 memory packets to ``host::sizeof long'' bytes - (typically 32
1599 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1600 address was never sent. Since fixing this bug may cause a break in
1601 some remote targets this variable is principally provided to
1602 facilitate backward compatibility. */
1604 static unsigned int remote_address_size
;
1607 /* User configurable variables for the number of characters in a
1608 memory read/write packet. MIN (rsa->remote_packet_size,
1609 rsa->sizeof_g_packet) is the default. Some targets need smaller
1610 values (fifo overruns, et.al.) and some users need larger values
1611 (speed up transfers). The variables ``preferred_*'' (the user
1612 request), ``current_*'' (what was actually set) and ``forced_*''
1613 (Positive - a soft limit, negative - a hard limit). */
1615 struct memory_packet_config
1622 /* The default max memory-write-packet-size, when the setting is
1623 "fixed". The 16k is historical. (It came from older GDB's using
1624 alloca for buffers and the knowledge (folklore?) that some hosts
1625 don't cope very well with large alloca calls.) */
1626 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1628 /* The minimum remote packet size for memory transfers. Ensures we
1629 can write at least one byte. */
1630 #define MIN_MEMORY_PACKET_SIZE 20
1632 /* Get the memory packet size, assuming it is fixed. */
1635 get_fixed_memory_packet_size (struct memory_packet_config
*config
)
1637 gdb_assert (config
->fixed_p
);
1639 if (config
->size
<= 0)
1640 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
;
1642 return config
->size
;
1645 /* Compute the current size of a read/write packet. Since this makes
1646 use of ``actual_register_packet_size'' the computation is dynamic. */
1649 remote_target::get_memory_packet_size (struct memory_packet_config
*config
)
1651 struct remote_state
*rs
= get_remote_state ();
1652 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1655 if (config
->fixed_p
)
1656 what_they_get
= get_fixed_memory_packet_size (config
);
1659 what_they_get
= get_remote_packet_size ();
1660 /* Limit the packet to the size specified by the user. */
1661 if (config
->size
> 0
1662 && what_they_get
> config
->size
)
1663 what_they_get
= config
->size
;
1665 /* Limit it to the size of the targets ``g'' response unless we have
1666 permission from the stub to use a larger packet size. */
1667 if (rs
->explicit_packet_size
== 0
1668 && rsa
->actual_register_packet_size
> 0
1669 && what_they_get
> rsa
->actual_register_packet_size
)
1670 what_they_get
= rsa
->actual_register_packet_size
;
1672 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1673 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1675 /* Make sure there is room in the global buffer for this packet
1676 (including its trailing NUL byte). */
1677 if (rs
->buf
.size () < what_they_get
+ 1)
1678 rs
->buf
.resize (2 * what_they_get
);
1680 return what_they_get
;
1683 /* Update the size of a read/write packet. If they user wants
1684 something really big then do a sanity check. */
1687 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1689 int fixed_p
= config
->fixed_p
;
1690 long size
= config
->size
;
1693 error (_("Argument required (integer, `fixed' or `limited')."));
1694 else if (strcmp (args
, "hard") == 0
1695 || strcmp (args
, "fixed") == 0)
1697 else if (strcmp (args
, "soft") == 0
1698 || strcmp (args
, "limit") == 0)
1704 size
= strtoul (args
, &end
, 0);
1706 error (_("Invalid %s (bad syntax)."), config
->name
);
1708 /* Instead of explicitly capping the size of a packet to or
1709 disallowing it, the user is allowed to set the size to
1710 something arbitrarily large. */
1714 if (fixed_p
&& !config
->fixed_p
)
1716 /* So that the query shows the correct value. */
1717 long query_size
= (size
<= 0
1718 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1721 if (! query (_("The target may not be able to correctly handle a %s\n"
1722 "of %ld bytes. Change the packet size? "),
1723 config
->name
, query_size
))
1724 error (_("Packet size not changed."));
1726 /* Update the config. */
1727 config
->fixed_p
= fixed_p
;
1728 config
->size
= size
;
1732 show_memory_packet_size (struct memory_packet_config
*config
)
1734 if (config
->size
== 0)
1735 printf_filtered (_("The %s is 0 (default). "), config
->name
);
1737 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1738 if (config
->fixed_p
)
1739 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1740 get_fixed_memory_packet_size (config
));
1743 remote_target
*remote
= get_current_remote_target ();
1746 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1747 remote
->get_memory_packet_size (config
));
1749 puts_filtered ("The actual limit will be further reduced "
1750 "dependent on the target.\n");
1754 /* FIXME: needs to be per-remote-target. */
1755 static struct memory_packet_config memory_write_packet_config
=
1757 "memory-write-packet-size",
1761 set_memory_write_packet_size (const char *args
, int from_tty
)
1763 set_memory_packet_size (args
, &memory_write_packet_config
);
1767 show_memory_write_packet_size (const char *args
, int from_tty
)
1769 show_memory_packet_size (&memory_write_packet_config
);
1772 /* Show the number of hardware watchpoints that can be used. */
1775 show_hardware_watchpoint_limit (struct ui_file
*file
, int from_tty
,
1776 struct cmd_list_element
*c
,
1779 fprintf_filtered (file
, _("The maximum number of target hardware "
1780 "watchpoints is %s.\n"), value
);
1783 /* Show the length limit (in bytes) for hardware watchpoints. */
1786 show_hardware_watchpoint_length_limit (struct ui_file
*file
, int from_tty
,
1787 struct cmd_list_element
*c
,
1790 fprintf_filtered (file
, _("The maximum length (in bytes) of a target "
1791 "hardware watchpoint is %s.\n"), value
);
1794 /* Show the number of hardware breakpoints that can be used. */
1797 show_hardware_breakpoint_limit (struct ui_file
*file
, int from_tty
,
1798 struct cmd_list_element
*c
,
1801 fprintf_filtered (file
, _("The maximum number of target hardware "
1802 "breakpoints is %s.\n"), value
);
1805 /* Controls the maximum number of characters to display in the debug output
1806 for each remote packet. The remaining characters are omitted. */
1808 static int remote_packet_max_chars
= 512;
1810 /* Show the maximum number of characters to display for each remote packet
1811 when remote debugging is enabled. */
1814 show_remote_packet_max_chars (struct ui_file
*file
, int from_tty
,
1815 struct cmd_list_element
*c
,
1818 fprintf_filtered (file
, _("Number of remote packet characters to "
1819 "display is %s.\n"), value
);
1823 remote_target::get_memory_write_packet_size ()
1825 return get_memory_packet_size (&memory_write_packet_config
);
1828 /* FIXME: needs to be per-remote-target. */
1829 static struct memory_packet_config memory_read_packet_config
=
1831 "memory-read-packet-size",
1835 set_memory_read_packet_size (const char *args
, int from_tty
)
1837 set_memory_packet_size (args
, &memory_read_packet_config
);
1841 show_memory_read_packet_size (const char *args
, int from_tty
)
1843 show_memory_packet_size (&memory_read_packet_config
);
1847 remote_target::get_memory_read_packet_size ()
1849 long size
= get_memory_packet_size (&memory_read_packet_config
);
1851 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1852 extra buffer size argument before the memory read size can be
1853 increased beyond this. */
1854 if (size
> get_remote_packet_size ())
1855 size
= get_remote_packet_size ();
1861 struct packet_config
1866 /* If auto, GDB auto-detects support for this packet or feature,
1867 either through qSupported, or by trying the packet and looking
1868 at the response. If true, GDB assumes the target supports this
1869 packet. If false, the packet is disabled. Configs that don't
1870 have an associated command always have this set to auto. */
1871 enum auto_boolean detect
;
1873 /* Does the target support this packet? */
1874 enum packet_support support
;
1877 static enum packet_support
packet_config_support (struct packet_config
*config
);
1878 static enum packet_support
packet_support (int packet
);
1881 show_packet_config_cmd (struct packet_config
*config
)
1883 const char *support
= "internal-error";
1885 switch (packet_config_support (config
))
1888 support
= "enabled";
1890 case PACKET_DISABLE
:
1891 support
= "disabled";
1893 case PACKET_SUPPORT_UNKNOWN
:
1894 support
= "unknown";
1897 switch (config
->detect
)
1899 case AUTO_BOOLEAN_AUTO
:
1900 printf_filtered (_("Support for the `%s' packet "
1901 "is auto-detected, currently %s.\n"),
1902 config
->name
, support
);
1904 case AUTO_BOOLEAN_TRUE
:
1905 case AUTO_BOOLEAN_FALSE
:
1906 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1907 config
->name
, support
);
1913 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1914 const char *title
, int legacy
)
1920 config
->name
= name
;
1921 config
->title
= title
;
1922 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet.",
1924 show_doc
= xstrprintf ("Show current use of remote "
1925 "protocol `%s' (%s) packet.",
1927 /* set/show TITLE-packet {auto,on,off} */
1928 cmd_name
= xstrprintf ("%s-packet", title
);
1929 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1930 &config
->detect
, set_doc
,
1931 show_doc
, NULL
, /* help_doc */
1933 show_remote_protocol_packet_cmd
,
1934 &remote_set_cmdlist
, &remote_show_cmdlist
);
1935 /* The command code copies the documentation strings. */
1938 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1943 legacy_name
= xstrprintf ("%s-packet", name
);
1944 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1945 &remote_set_cmdlist
);
1946 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1947 &remote_show_cmdlist
);
1951 static enum packet_result
1952 packet_check_result (const char *buf
)
1956 /* The stub recognized the packet request. Check that the
1957 operation succeeded. */
1959 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1961 /* "Enn" - definitely an error. */
1962 return PACKET_ERROR
;
1964 /* Always treat "E." as an error. This will be used for
1965 more verbose error messages, such as E.memtypes. */
1966 if (buf
[0] == 'E' && buf
[1] == '.')
1967 return PACKET_ERROR
;
1969 /* The packet may or may not be OK. Just assume it is. */
1973 /* The stub does not support the packet. */
1974 return PACKET_UNKNOWN
;
1977 static enum packet_result
1978 packet_check_result (const gdb::char_vector
&buf
)
1980 return packet_check_result (buf
.data ());
1983 static enum packet_result
1984 packet_ok (const char *buf
, struct packet_config
*config
)
1986 enum packet_result result
;
1988 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1989 && config
->support
== PACKET_DISABLE
)
1990 internal_error (__FILE__
, __LINE__
,
1991 _("packet_ok: attempt to use a disabled packet"));
1993 result
= packet_check_result (buf
);
1998 /* The stub recognized the packet request. */
1999 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
2001 remote_debug_printf ("Packet %s (%s) is supported",
2002 config
->name
, config
->title
);
2003 config
->support
= PACKET_ENABLE
;
2006 case PACKET_UNKNOWN
:
2007 /* The stub does not support the packet. */
2008 if (config
->detect
== AUTO_BOOLEAN_AUTO
2009 && config
->support
== PACKET_ENABLE
)
2011 /* If the stub previously indicated that the packet was
2012 supported then there is a protocol error. */
2013 error (_("Protocol error: %s (%s) conflicting enabled responses."),
2014 config
->name
, config
->title
);
2016 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
2018 /* The user set it wrong. */
2019 error (_("Enabled packet %s (%s) not recognized by stub"),
2020 config
->name
, config
->title
);
2023 remote_debug_printf ("Packet %s (%s) is NOT supported",
2024 config
->name
, config
->title
);
2025 config
->support
= PACKET_DISABLE
;
2032 static enum packet_result
2033 packet_ok (const gdb::char_vector
&buf
, struct packet_config
*config
)
2035 return packet_ok (buf
.data (), config
);
2052 PACKET_vFile_pwrite
,
2054 PACKET_vFile_unlink
,
2055 PACKET_vFile_readlink
,
2058 PACKET_qXfer_features
,
2059 PACKET_qXfer_exec_file
,
2060 PACKET_qXfer_libraries
,
2061 PACKET_qXfer_libraries_svr4
,
2062 PACKET_qXfer_memory_map
,
2063 PACKET_qXfer_osdata
,
2064 PACKET_qXfer_threads
,
2065 PACKET_qXfer_statictrace_read
,
2066 PACKET_qXfer_traceframe_info
,
2072 PACKET_QPassSignals
,
2073 PACKET_QCatchSyscalls
,
2074 PACKET_QProgramSignals
,
2075 PACKET_QSetWorkingDir
,
2076 PACKET_QStartupWithShell
,
2077 PACKET_QEnvironmentHexEncoded
,
2078 PACKET_QEnvironmentReset
,
2079 PACKET_QEnvironmentUnset
,
2081 PACKET_qSearch_memory
,
2084 PACKET_QStartNoAckMode
,
2086 PACKET_qXfer_siginfo_read
,
2087 PACKET_qXfer_siginfo_write
,
2090 /* Support for conditional tracepoints. */
2091 PACKET_ConditionalTracepoints
,
2093 /* Support for target-side breakpoint conditions. */
2094 PACKET_ConditionalBreakpoints
,
2096 /* Support for target-side breakpoint commands. */
2097 PACKET_BreakpointCommands
,
2099 /* Support for fast tracepoints. */
2100 PACKET_FastTracepoints
,
2102 /* Support for static tracepoints. */
2103 PACKET_StaticTracepoints
,
2105 /* Support for installing tracepoints while a trace experiment is
2107 PACKET_InstallInTrace
,
2111 PACKET_TracepointSource
,
2114 PACKET_QDisableRandomization
,
2116 PACKET_QTBuffer_size
,
2120 PACKET_qXfer_btrace
,
2122 /* Support for the QNonStop packet. */
2125 /* Support for the QThreadEvents packet. */
2126 PACKET_QThreadEvents
,
2128 /* Support for multi-process extensions. */
2129 PACKET_multiprocess_feature
,
2131 /* Support for enabling and disabling tracepoints while a trace
2132 experiment is running. */
2133 PACKET_EnableDisableTracepoints_feature
,
2135 /* Support for collecting strings using the tracenz bytecode. */
2136 PACKET_tracenz_feature
,
2138 /* Support for continuing to run a trace experiment while GDB is
2140 PACKET_DisconnectedTracing_feature
,
2142 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2143 PACKET_augmented_libraries_svr4_read_feature
,
2145 /* Support for the qXfer:btrace-conf:read packet. */
2146 PACKET_qXfer_btrace_conf
,
2148 /* Support for the Qbtrace-conf:bts:size packet. */
2149 PACKET_Qbtrace_conf_bts_size
,
2151 /* Support for swbreak+ feature. */
2152 PACKET_swbreak_feature
,
2154 /* Support for hwbreak+ feature. */
2155 PACKET_hwbreak_feature
,
2157 /* Support for fork events. */
2158 PACKET_fork_event_feature
,
2160 /* Support for vfork events. */
2161 PACKET_vfork_event_feature
,
2163 /* Support for the Qbtrace-conf:pt:size packet. */
2164 PACKET_Qbtrace_conf_pt_size
,
2166 /* Support for exec events. */
2167 PACKET_exec_event_feature
,
2169 /* Support for query supported vCont actions. */
2170 PACKET_vContSupported
,
2172 /* Support remote CTRL-C. */
2175 /* Support TARGET_WAITKIND_NO_RESUMED. */
2181 /* FIXME: needs to be per-remote-target. Ignoring this for now,
2182 assuming all remote targets are the same server (thus all support
2183 the same packets). */
2184 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
2186 /* Returns the packet's corresponding "set remote foo-packet" command
2187 state. See struct packet_config for more details. */
2189 static enum auto_boolean
2190 packet_set_cmd_state (int packet
)
2192 return remote_protocol_packets
[packet
].detect
;
2195 /* Returns whether a given packet or feature is supported. This takes
2196 into account the state of the corresponding "set remote foo-packet"
2197 command, which may be used to bypass auto-detection. */
2199 static enum packet_support
2200 packet_config_support (struct packet_config
*config
)
2202 switch (config
->detect
)
2204 case AUTO_BOOLEAN_TRUE
:
2205 return PACKET_ENABLE
;
2206 case AUTO_BOOLEAN_FALSE
:
2207 return PACKET_DISABLE
;
2208 case AUTO_BOOLEAN_AUTO
:
2209 return config
->support
;
2211 gdb_assert_not_reached (_("bad switch"));
2215 /* Same as packet_config_support, but takes the packet's enum value as
2218 static enum packet_support
2219 packet_support (int packet
)
2221 struct packet_config
*config
= &remote_protocol_packets
[packet
];
2223 return packet_config_support (config
);
2227 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
2228 struct cmd_list_element
*c
,
2231 struct packet_config
*packet
;
2233 for (packet
= remote_protocol_packets
;
2234 packet
< &remote_protocol_packets
[PACKET_MAX
];
2237 if (&packet
->detect
== c
->var
)
2239 show_packet_config_cmd (packet
);
2243 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
2247 /* Should we try one of the 'Z' requests? */
2251 Z_PACKET_SOFTWARE_BP
,
2252 Z_PACKET_HARDWARE_BP
,
2259 /* For compatibility with older distributions. Provide a ``set remote
2260 Z-packet ...'' command that updates all the Z packet types. */
2262 static enum auto_boolean remote_Z_packet_detect
;
2265 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
2266 struct cmd_list_element
*c
)
2270 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2271 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
2275 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
2276 struct cmd_list_element
*c
,
2281 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2283 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
2287 /* Returns true if the multi-process extensions are in effect. */
2290 remote_multi_process_p (struct remote_state
*rs
)
2292 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
2295 /* Returns true if fork events are supported. */
2298 remote_fork_event_p (struct remote_state
*rs
)
2300 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
2303 /* Returns true if vfork events are supported. */
2306 remote_vfork_event_p (struct remote_state
*rs
)
2308 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
2311 /* Returns true if exec events are supported. */
2314 remote_exec_event_p (struct remote_state
*rs
)
2316 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
2319 /* Insert fork catchpoint target routine. If fork events are enabled
2320 then return success, nothing more to do. */
2323 remote_target::insert_fork_catchpoint (int pid
)
2325 struct remote_state
*rs
= get_remote_state ();
2327 return !remote_fork_event_p (rs
);
2330 /* Remove fork catchpoint target routine. Nothing to do, just
2334 remote_target::remove_fork_catchpoint (int pid
)
2339 /* Insert vfork catchpoint target routine. If vfork events are enabled
2340 then return success, nothing more to do. */
2343 remote_target::insert_vfork_catchpoint (int pid
)
2345 struct remote_state
*rs
= get_remote_state ();
2347 return !remote_vfork_event_p (rs
);
2350 /* Remove vfork catchpoint target routine. Nothing to do, just
2354 remote_target::remove_vfork_catchpoint (int pid
)
2359 /* Insert exec catchpoint target routine. If exec events are
2360 enabled, just return success. */
2363 remote_target::insert_exec_catchpoint (int pid
)
2365 struct remote_state
*rs
= get_remote_state ();
2367 return !remote_exec_event_p (rs
);
2370 /* Remove exec catchpoint target routine. Nothing to do, just
2374 remote_target::remove_exec_catchpoint (int pid
)
2381 /* Take advantage of the fact that the TID field is not used, to tag
2382 special ptids with it set to != 0. */
2383 static const ptid_t
magic_null_ptid (42000, -1, 1);
2384 static const ptid_t
not_sent_ptid (42000, -2, 1);
2385 static const ptid_t
any_thread_ptid (42000, 0, 1);
2387 /* Find out if the stub attached to PID (and hence GDB should offer to
2388 detach instead of killing it when bailing out). */
2391 remote_target::remote_query_attached (int pid
)
2393 struct remote_state
*rs
= get_remote_state ();
2394 size_t size
= get_remote_packet_size ();
2396 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
2399 if (remote_multi_process_p (rs
))
2400 xsnprintf (rs
->buf
.data (), size
, "qAttached:%x", pid
);
2402 xsnprintf (rs
->buf
.data (), size
, "qAttached");
2405 getpkt (&rs
->buf
, 0);
2407 switch (packet_ok (rs
->buf
,
2408 &remote_protocol_packets
[PACKET_qAttached
]))
2411 if (strcmp (rs
->buf
.data (), "1") == 0)
2415 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
2417 case PACKET_UNKNOWN
:
2424 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2425 has been invented by GDB, instead of reported by the target. Since
2426 we can be connected to a remote system before before knowing about
2427 any inferior, mark the target with execution when we find the first
2428 inferior. If ATTACHED is 1, then we had just attached to this
2429 inferior. If it is 0, then we just created this inferior. If it
2430 is -1, then try querying the remote stub to find out if it had
2431 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2432 attempt to open this inferior's executable as the main executable
2433 if no main executable is open already. */
2436 remote_target::remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
2439 struct inferior
*inf
;
2441 /* Check whether this process we're learning about is to be
2442 considered attached, or if is to be considered to have been
2443 spawned by the stub. */
2445 attached
= remote_query_attached (pid
);
2447 if (gdbarch_has_global_solist (target_gdbarch ()))
2449 /* If the target shares code across all inferiors, then every
2450 attach adds a new inferior. */
2451 inf
= add_inferior (pid
);
2453 /* ... and every inferior is bound to the same program space.
2454 However, each inferior may still have its own address
2456 inf
->aspace
= maybe_new_address_space ();
2457 inf
->pspace
= current_program_space
;
2461 /* In the traditional debugging scenario, there's a 1-1 match
2462 between program/address spaces. We simply bind the inferior
2463 to the program space's address space. */
2464 inf
= current_inferior ();
2466 /* However, if the current inferior is already bound to a
2467 process, find some other empty inferior. */
2471 for (inferior
*it
: all_inferiors ())
2480 /* Since all inferiors were already bound to a process, add
2482 inf
= add_inferior_with_spaces ();
2484 switch_to_inferior_no_thread (inf
);
2485 inf
->push_target (this);
2486 inferior_appeared (inf
, pid
);
2489 inf
->attach_flag
= attached
;
2490 inf
->fake_pid_p
= fake_pid_p
;
2492 /* If no main executable is currently open then attempt to
2493 open the file that was executed to create this inferior. */
2494 if (try_open_exec
&& get_exec_file (0) == NULL
)
2495 exec_file_locate_attach (pid
, 0, 1);
2497 /* Check for exec file mismatch, and let the user solve it. */
2498 validate_exec_file (1);
2503 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
2504 static remote_thread_info
*get_remote_thread_info (remote_target
*target
,
2507 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2508 according to RUNNING. */
2511 remote_target::remote_add_thread (ptid_t ptid
, bool running
, bool executing
)
2513 struct remote_state
*rs
= get_remote_state ();
2514 struct thread_info
*thread
;
2516 /* GDB historically didn't pull threads in the initial connection
2517 setup. If the remote target doesn't even have a concept of
2518 threads (e.g., a bare-metal target), even if internally we
2519 consider that a single-threaded target, mentioning a new thread
2520 might be confusing to the user. Be silent then, preserving the
2521 age old behavior. */
2522 if (rs
->starting_up
)
2523 thread
= add_thread_silent (this, ptid
);
2525 thread
= add_thread (this, ptid
);
2527 /* We start by assuming threads are resumed. That state then gets updated
2528 when we process a matching stop reply. */
2529 get_remote_thread_info (thread
)->set_resumed ();
2531 set_executing (this, ptid
, executing
);
2532 set_running (this, ptid
, running
);
2537 /* Come here when we learn about a thread id from the remote target.
2538 It may be the first time we hear about such thread, so take the
2539 opportunity to add it to GDB's thread list. In case this is the
2540 first time we're noticing its corresponding inferior, add it to
2541 GDB's inferior list as well. EXECUTING indicates whether the
2542 thread is (internally) executing or stopped. */
2545 remote_target::remote_notice_new_inferior (ptid_t currthread
, int executing
)
2547 /* In non-stop mode, we assume new found threads are (externally)
2548 running until proven otherwise with a stop reply. In all-stop,
2549 we can only get here if all threads are stopped. */
2550 int running
= target_is_non_stop_p () ? 1 : 0;
2552 /* If this is a new thread, add it to GDB's thread list.
2553 If we leave it up to WFI to do this, bad things will happen. */
2555 thread_info
*tp
= find_thread_ptid (this, currthread
);
2556 if (tp
!= NULL
&& tp
->state
== THREAD_EXITED
)
2558 /* We're seeing an event on a thread id we knew had exited.
2559 This has to be a new thread reusing the old id. Add it. */
2560 remote_add_thread (currthread
, running
, executing
);
2564 if (!in_thread_list (this, currthread
))
2566 struct inferior
*inf
= NULL
;
2567 int pid
= currthread
.pid ();
2569 if (inferior_ptid
.is_pid ()
2570 && pid
== inferior_ptid
.pid ())
2572 /* inferior_ptid has no thread member yet. This can happen
2573 with the vAttach -> remote_wait,"TAAthread:" path if the
2574 stub doesn't support qC. This is the first stop reported
2575 after an attach, so this is the main thread. Update the
2576 ptid in the thread list. */
2577 if (in_thread_list (this, ptid_t (pid
)))
2578 thread_change_ptid (this, inferior_ptid
, currthread
);
2582 = remote_add_thread (currthread
, running
, executing
);
2583 switch_to_thread (thr
);
2588 if (magic_null_ptid
== inferior_ptid
)
2590 /* inferior_ptid is not set yet. This can happen with the
2591 vRun -> remote_wait,"TAAthread:" path if the stub
2592 doesn't support qC. This is the first stop reported
2593 after an attach, so this is the main thread. Update the
2594 ptid in the thread list. */
2595 thread_change_ptid (this, inferior_ptid
, currthread
);
2599 /* When connecting to a target remote, or to a target
2600 extended-remote which already was debugging an inferior, we
2601 may not know about it yet. Add it before adding its child
2602 thread, so notifications are emitted in a sensible order. */
2603 if (find_inferior_pid (this, currthread
.pid ()) == NULL
)
2605 struct remote_state
*rs
= get_remote_state ();
2606 bool fake_pid_p
= !remote_multi_process_p (rs
);
2608 inf
= remote_add_inferior (fake_pid_p
,
2609 currthread
.pid (), -1, 1);
2612 /* This is really a new thread. Add it. */
2613 thread_info
*new_thr
2614 = remote_add_thread (currthread
, running
, executing
);
2616 /* If we found a new inferior, let the common code do whatever
2617 it needs to with it (e.g., read shared libraries, insert
2618 breakpoints), unless we're just setting up an all-stop
2622 struct remote_state
*rs
= get_remote_state ();
2624 if (!rs
->starting_up
)
2625 notice_new_inferior (new_thr
, executing
, 0);
2630 /* Return THREAD's private thread data, creating it if necessary. */
2632 static remote_thread_info
*
2633 get_remote_thread_info (thread_info
*thread
)
2635 gdb_assert (thread
!= NULL
);
2637 if (thread
->priv
== NULL
)
2638 thread
->priv
.reset (new remote_thread_info
);
2640 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
2643 /* Return PTID's private thread data, creating it if necessary. */
2645 static remote_thread_info
*
2646 get_remote_thread_info (remote_target
*target
, ptid_t ptid
)
2648 thread_info
*thr
= find_thread_ptid (target
, ptid
);
2649 return get_remote_thread_info (thr
);
2652 /* Call this function as a result of
2653 1) A halt indication (T packet) containing a thread id
2654 2) A direct query of currthread
2655 3) Successful execution of set thread */
2658 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2660 rs
->general_thread
= currthread
;
2663 /* If 'QPassSignals' is supported, tell the remote stub what signals
2664 it can simply pass through to the inferior without reporting. */
2667 remote_target::pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2669 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2671 char *pass_packet
, *p
;
2673 struct remote_state
*rs
= get_remote_state ();
2675 gdb_assert (pass_signals
.size () < 256);
2676 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2678 if (pass_signals
[i
])
2681 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2682 strcpy (pass_packet
, "QPassSignals:");
2683 p
= pass_packet
+ strlen (pass_packet
);
2684 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2686 if (pass_signals
[i
])
2689 *p
++ = tohex (i
>> 4);
2690 *p
++ = tohex (i
& 15);
2699 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2701 putpkt (pass_packet
);
2702 getpkt (&rs
->buf
, 0);
2703 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2704 xfree (rs
->last_pass_packet
);
2705 rs
->last_pass_packet
= pass_packet
;
2708 xfree (pass_packet
);
2712 /* If 'QCatchSyscalls' is supported, tell the remote stub
2713 to report syscalls to GDB. */
2716 remote_target::set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
2717 gdb::array_view
<const int> syscall_counts
)
2719 const char *catch_packet
;
2720 enum packet_result result
;
2723 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2725 /* Not supported. */
2729 if (needed
&& any_count
== 0)
2731 /* Count how many syscalls are to be caught. */
2732 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2734 if (syscall_counts
[i
] != 0)
2739 remote_debug_printf ("pid %d needed %d any_count %d n_sysno %d",
2740 pid
, needed
, any_count
, n_sysno
);
2742 std::string built_packet
;
2745 /* Prepare a packet with the sysno list, assuming max 8+1
2746 characters for a sysno. If the resulting packet size is too
2747 big, fallback on the non-selective packet. */
2748 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2749 built_packet
.reserve (maxpktsz
);
2750 built_packet
= "QCatchSyscalls:1";
2753 /* Add in each syscall to be caught. */
2754 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2756 if (syscall_counts
[i
] != 0)
2757 string_appendf (built_packet
, ";%zx", i
);
2760 if (built_packet
.size () > get_remote_packet_size ())
2762 /* catch_packet too big. Fallback to less efficient
2763 non selective mode, with GDB doing the filtering. */
2764 catch_packet
= "QCatchSyscalls:1";
2767 catch_packet
= built_packet
.c_str ();
2770 catch_packet
= "QCatchSyscalls:0";
2772 struct remote_state
*rs
= get_remote_state ();
2774 putpkt (catch_packet
);
2775 getpkt (&rs
->buf
, 0);
2776 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2777 if (result
== PACKET_OK
)
2783 /* If 'QProgramSignals' is supported, tell the remote stub what
2784 signals it should pass through to the inferior when detaching. */
2787 remote_target::program_signals (gdb::array_view
<const unsigned char> signals
)
2789 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2793 struct remote_state
*rs
= get_remote_state ();
2795 gdb_assert (signals
.size () < 256);
2796 for (size_t i
= 0; i
< signals
.size (); i
++)
2801 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2802 strcpy (packet
, "QProgramSignals:");
2803 p
= packet
+ strlen (packet
);
2804 for (size_t i
= 0; i
< signals
.size (); i
++)
2806 if (signal_pass_state (i
))
2809 *p
++ = tohex (i
>> 4);
2810 *p
++ = tohex (i
& 15);
2819 if (!rs
->last_program_signals_packet
2820 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2823 getpkt (&rs
->buf
, 0);
2824 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2825 xfree (rs
->last_program_signals_packet
);
2826 rs
->last_program_signals_packet
= packet
;
2833 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2834 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2835 thread. If GEN is set, set the general thread, if not, then set
2836 the step/continue thread. */
2838 remote_target::set_thread (ptid_t ptid
, int gen
)
2840 struct remote_state
*rs
= get_remote_state ();
2841 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2842 char *buf
= rs
->buf
.data ();
2843 char *endbuf
= buf
+ get_remote_packet_size ();
2849 *buf
++ = gen
? 'g' : 'c';
2850 if (ptid
== magic_null_ptid
)
2851 xsnprintf (buf
, endbuf
- buf
, "0");
2852 else if (ptid
== any_thread_ptid
)
2853 xsnprintf (buf
, endbuf
- buf
, "0");
2854 else if (ptid
== minus_one_ptid
)
2855 xsnprintf (buf
, endbuf
- buf
, "-1");
2857 write_ptid (buf
, endbuf
, ptid
);
2859 getpkt (&rs
->buf
, 0);
2861 rs
->general_thread
= ptid
;
2863 rs
->continue_thread
= ptid
;
2867 remote_target::set_general_thread (ptid_t ptid
)
2869 set_thread (ptid
, 1);
2873 remote_target::set_continue_thread (ptid_t ptid
)
2875 set_thread (ptid
, 0);
2878 /* Change the remote current process. Which thread within the process
2879 ends up selected isn't important, as long as it is the same process
2880 as what INFERIOR_PTID points to.
2882 This comes from that fact that there is no explicit notion of
2883 "selected process" in the protocol. The selected process for
2884 general operations is the process the selected general thread
2888 remote_target::set_general_process ()
2890 struct remote_state
*rs
= get_remote_state ();
2892 /* If the remote can't handle multiple processes, don't bother. */
2893 if (!remote_multi_process_p (rs
))
2896 /* We only need to change the remote current thread if it's pointing
2897 at some other process. */
2898 if (rs
->general_thread
.pid () != inferior_ptid
.pid ())
2899 set_general_thread (inferior_ptid
);
2903 /* Return nonzero if this is the main thread that we made up ourselves
2904 to model non-threaded targets as single-threaded. */
2907 remote_thread_always_alive (ptid_t ptid
)
2909 if (ptid
== magic_null_ptid
)
2910 /* The main thread is always alive. */
2913 if (ptid
.pid () != 0 && ptid
.lwp () == 0)
2914 /* The main thread is always alive. This can happen after a
2915 vAttach, if the remote side doesn't support
2922 /* Return nonzero if the thread PTID is still alive on the remote
2926 remote_target::thread_alive (ptid_t ptid
)
2928 struct remote_state
*rs
= get_remote_state ();
2931 /* Check if this is a thread that we made up ourselves to model
2932 non-threaded targets as single-threaded. */
2933 if (remote_thread_always_alive (ptid
))
2936 p
= rs
->buf
.data ();
2937 endp
= p
+ get_remote_packet_size ();
2940 write_ptid (p
, endp
, ptid
);
2943 getpkt (&rs
->buf
, 0);
2944 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2947 /* Return a pointer to a thread name if we know it and NULL otherwise.
2948 The thread_info object owns the memory for the name. */
2951 remote_target::thread_name (struct thread_info
*info
)
2953 if (info
->priv
!= NULL
)
2955 const std::string
&name
= get_remote_thread_info (info
)->name
;
2956 return !name
.empty () ? name
.c_str () : NULL
;
2962 /* About these extended threadlist and threadinfo packets. They are
2963 variable length packets but, the fields within them are often fixed
2964 length. They are redundant enough to send over UDP as is the
2965 remote protocol in general. There is a matching unit test module
2968 /* WARNING: This threadref data structure comes from the remote O.S.,
2969 libstub protocol encoding, and remote.c. It is not particularly
2972 /* Right now, the internal structure is int. We want it to be bigger.
2973 Plan to fix this. */
2975 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2977 /* gdb_ext_thread_info is an internal GDB data structure which is
2978 equivalent to the reply of the remote threadinfo packet. */
2980 struct gdb_ext_thread_info
2982 threadref threadid
; /* External form of thread reference. */
2983 int active
; /* Has state interesting to GDB?
2985 char display
[256]; /* Brief state display, name,
2986 blocked/suspended. */
2987 char shortname
[32]; /* To be used to name threads. */
2988 char more_display
[256]; /* Long info, statistics, queue depth,
2992 /* The volume of remote transfers can be limited by submitting
2993 a mask containing bits specifying the desired information.
2994 Use a union of these values as the 'selection' parameter to
2995 get_thread_info. FIXME: Make these TAG names more thread specific. */
2997 #define TAG_THREADID 1
2998 #define TAG_EXISTS 2
2999 #define TAG_DISPLAY 4
3000 #define TAG_THREADNAME 8
3001 #define TAG_MOREDISPLAY 16
3003 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
3005 static const char *unpack_nibble (const char *buf
, int *val
);
3007 static const char *unpack_byte (const char *buf
, int *value
);
3009 static char *pack_int (char *buf
, int value
);
3011 static const char *unpack_int (const char *buf
, int *value
);
3013 static const char *unpack_string (const char *src
, char *dest
, int length
);
3015 static char *pack_threadid (char *pkt
, threadref
*id
);
3017 static const char *unpack_threadid (const char *inbuf
, threadref
*id
);
3019 void int_to_threadref (threadref
*id
, int value
);
3021 static int threadref_to_int (threadref
*ref
);
3023 static void copy_threadref (threadref
*dest
, threadref
*src
);
3025 static int threadmatch (threadref
*dest
, threadref
*src
);
3027 static char *pack_threadinfo_request (char *pkt
, int mode
,
3030 static char *pack_threadlist_request (char *pkt
, int startflag
,
3032 threadref
*nextthread
);
3034 static int remote_newthread_step (threadref
*ref
, void *context
);
3037 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
3038 buffer we're allowed to write to. Returns
3039 BUF+CHARACTERS_WRITTEN. */
3042 remote_target::write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
3045 struct remote_state
*rs
= get_remote_state ();
3047 if (remote_multi_process_p (rs
))
3051 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
3053 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
3057 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
3059 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
3064 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
3065 last parsed char. Returns null_ptid if no thread id is found, and
3066 throws an error if the thread id has an invalid format. */
3069 read_ptid (const char *buf
, const char **obuf
)
3071 const char *p
= buf
;
3073 ULONGEST pid
= 0, tid
= 0;
3077 /* Multi-process ptid. */
3078 pp
= unpack_varlen_hex (p
+ 1, &pid
);
3080 error (_("invalid remote ptid: %s"), p
);
3083 pp
= unpack_varlen_hex (p
+ 1, &tid
);
3086 return ptid_t (pid
, tid
, 0);
3089 /* No multi-process. Just a tid. */
3090 pp
= unpack_varlen_hex (p
, &tid
);
3092 /* Return null_ptid when no thread id is found. */
3100 /* Since the stub is not sending a process id, then default to
3101 what's in inferior_ptid, unless it's null at this point. If so,
3102 then since there's no way to know the pid of the reported
3103 threads, use the magic number. */
3104 if (inferior_ptid
== null_ptid
)
3105 pid
= magic_null_ptid
.pid ();
3107 pid
= inferior_ptid
.pid ();
3111 return ptid_t (pid
, tid
, 0);
3117 if (ch
>= 'a' && ch
<= 'f')
3118 return ch
- 'a' + 10;
3119 if (ch
>= '0' && ch
<= '9')
3121 if (ch
>= 'A' && ch
<= 'F')
3122 return ch
- 'A' + 10;
3127 stub_unpack_int (const char *buff
, int fieldlength
)
3134 nibble
= stubhex (*buff
++);
3138 retval
= retval
<< 4;
3144 unpack_nibble (const char *buf
, int *val
)
3146 *val
= fromhex (*buf
++);
3151 unpack_byte (const char *buf
, int *value
)
3153 *value
= stub_unpack_int (buf
, 2);
3158 pack_int (char *buf
, int value
)
3160 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
3161 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
3162 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
3163 buf
= pack_hex_byte (buf
, (value
& 0xff));
3168 unpack_int (const char *buf
, int *value
)
3170 *value
= stub_unpack_int (buf
, 8);
3174 #if 0 /* Currently unused, uncomment when needed. */
3175 static char *pack_string (char *pkt
, char *string
);
3178 pack_string (char *pkt
, char *string
)
3183 len
= strlen (string
);
3185 len
= 200; /* Bigger than most GDB packets, junk??? */
3186 pkt
= pack_hex_byte (pkt
, len
);
3190 if ((ch
== '\0') || (ch
== '#'))
3191 ch
= '*'; /* Protect encapsulation. */
3196 #endif /* 0 (unused) */
3199 unpack_string (const char *src
, char *dest
, int length
)
3208 pack_threadid (char *pkt
, threadref
*id
)
3211 unsigned char *altid
;
3213 altid
= (unsigned char *) id
;
3214 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
3216 pkt
= pack_hex_byte (pkt
, *altid
++);
3222 unpack_threadid (const char *inbuf
, threadref
*id
)
3225 const char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
3228 altref
= (char *) id
;
3230 while (inbuf
< limit
)
3232 x
= stubhex (*inbuf
++);
3233 y
= stubhex (*inbuf
++);
3234 *altref
++ = (x
<< 4) | y
;
3239 /* Externally, threadrefs are 64 bits but internally, they are still
3240 ints. This is due to a mismatch of specifications. We would like
3241 to use 64bit thread references internally. This is an adapter
3245 int_to_threadref (threadref
*id
, int value
)
3247 unsigned char *scan
;
3249 scan
= (unsigned char *) id
;
3255 *scan
++ = (value
>> 24) & 0xff;
3256 *scan
++ = (value
>> 16) & 0xff;
3257 *scan
++ = (value
>> 8) & 0xff;
3258 *scan
++ = (value
& 0xff);
3262 threadref_to_int (threadref
*ref
)
3265 unsigned char *scan
;
3271 value
= (value
<< 8) | ((*scan
++) & 0xff);
3276 copy_threadref (threadref
*dest
, threadref
*src
)
3279 unsigned char *csrc
, *cdest
;
3281 csrc
= (unsigned char *) src
;
3282 cdest
= (unsigned char *) dest
;
3289 threadmatch (threadref
*dest
, threadref
*src
)
3291 /* Things are broken right now, so just assume we got a match. */
3293 unsigned char *srcp
, *destp
;
3295 srcp
= (char *) src
;
3296 destp
= (char *) dest
;
3300 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
3307 threadid:1, # always request threadid
3314 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3317 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
3319 *pkt
++ = 'q'; /* Info Query */
3320 *pkt
++ = 'P'; /* process or thread info */
3321 pkt
= pack_int (pkt
, mode
); /* mode */
3322 pkt
= pack_threadid (pkt
, id
); /* threadid */
3323 *pkt
= '\0'; /* terminate */
3327 /* These values tag the fields in a thread info response packet. */
3328 /* Tagging the fields allows us to request specific fields and to
3329 add more fields as time goes by. */
3331 #define TAG_THREADID 1 /* Echo the thread identifier. */
3332 #define TAG_EXISTS 2 /* Is this process defined enough to
3333 fetch registers and its stack? */
3334 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3335 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3336 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3340 remote_target::remote_unpack_thread_info_response (const char *pkt
,
3341 threadref
*expectedref
,
3342 gdb_ext_thread_info
*info
)
3344 struct remote_state
*rs
= get_remote_state ();
3348 const char *limit
= pkt
+ rs
->buf
.size (); /* Plausible parsing limit. */
3351 /* info->threadid = 0; FIXME: implement zero_threadref. */
3353 info
->display
[0] = '\0';
3354 info
->shortname
[0] = '\0';
3355 info
->more_display
[0] = '\0';
3357 /* Assume the characters indicating the packet type have been
3359 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
3360 pkt
= unpack_threadid (pkt
, &ref
);
3363 warning (_("Incomplete response to threadinfo request."));
3364 if (!threadmatch (&ref
, expectedref
))
3365 { /* This is an answer to a different request. */
3366 warning (_("ERROR RMT Thread info mismatch."));
3369 copy_threadref (&info
->threadid
, &ref
);
3371 /* Loop on tagged fields , try to bail if something goes wrong. */
3373 /* Packets are terminated with nulls. */
3374 while ((pkt
< limit
) && mask
&& *pkt
)
3376 pkt
= unpack_int (pkt
, &tag
); /* tag */
3377 pkt
= unpack_byte (pkt
, &length
); /* length */
3378 if (!(tag
& mask
)) /* Tags out of synch with mask. */
3380 warning (_("ERROR RMT: threadinfo tag mismatch."));
3384 if (tag
== TAG_THREADID
)
3388 warning (_("ERROR RMT: length of threadid is not 16."));
3392 pkt
= unpack_threadid (pkt
, &ref
);
3393 mask
= mask
& ~TAG_THREADID
;
3396 if (tag
== TAG_EXISTS
)
3398 info
->active
= stub_unpack_int (pkt
, length
);
3400 mask
= mask
& ~(TAG_EXISTS
);
3403 warning (_("ERROR RMT: 'exists' length too long."));
3409 if (tag
== TAG_THREADNAME
)
3411 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
3412 mask
= mask
& ~TAG_THREADNAME
;
3415 if (tag
== TAG_DISPLAY
)
3417 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
3418 mask
= mask
& ~TAG_DISPLAY
;
3421 if (tag
== TAG_MOREDISPLAY
)
3423 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
3424 mask
= mask
& ~TAG_MOREDISPLAY
;
3427 warning (_("ERROR RMT: unknown thread info tag."));
3428 break; /* Not a tag we know about. */
3434 remote_target::remote_get_threadinfo (threadref
*threadid
,
3436 gdb_ext_thread_info
*info
)
3438 struct remote_state
*rs
= get_remote_state ();
3441 pack_threadinfo_request (rs
->buf
.data (), fieldset
, threadid
);
3443 getpkt (&rs
->buf
, 0);
3445 if (rs
->buf
[0] == '\0')
3448 result
= remote_unpack_thread_info_response (&rs
->buf
[2],
3453 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3456 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
3457 threadref
*nextthread
)
3459 *pkt
++ = 'q'; /* info query packet */
3460 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
3461 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
3462 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
3463 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
3468 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3471 remote_target::parse_threadlist_response (const char *pkt
, int result_limit
,
3472 threadref
*original_echo
,
3473 threadref
*resultlist
,
3476 struct remote_state
*rs
= get_remote_state ();
3477 int count
, resultcount
, done
;
3480 /* Assume the 'q' and 'M chars have been stripped. */
3481 const char *limit
= pkt
+ (rs
->buf
.size () - BUF_THREAD_ID_SIZE
);
3482 /* done parse past here */
3483 pkt
= unpack_byte (pkt
, &count
); /* count field */
3484 pkt
= unpack_nibble (pkt
, &done
);
3485 /* The first threadid is the argument threadid. */
3486 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
3487 while ((count
-- > 0) && (pkt
< limit
))
3489 pkt
= unpack_threadid (pkt
, resultlist
++);
3490 if (resultcount
++ >= result_limit
)
3498 /* Fetch the next batch of threads from the remote. Returns -1 if the
3499 qL packet is not supported, 0 on error and 1 on success. */
3502 remote_target::remote_get_threadlist (int startflag
, threadref
*nextthread
,
3503 int result_limit
, int *done
, int *result_count
,
3504 threadref
*threadlist
)
3506 struct remote_state
*rs
= get_remote_state ();
3509 /* Truncate result limit to be smaller than the packet size. */
3510 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
3511 >= get_remote_packet_size ())
3512 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
3514 pack_threadlist_request (rs
->buf
.data (), startflag
, result_limit
,
3517 getpkt (&rs
->buf
, 0);
3518 if (rs
->buf
[0] == '\0')
3520 /* Packet not supported. */
3525 parse_threadlist_response (&rs
->buf
[2], result_limit
,
3526 &rs
->echo_nextthread
, threadlist
, done
);
3528 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
3530 /* FIXME: This is a good reason to drop the packet. */
3531 /* Possibly, there is a duplicate response. */
3533 retransmit immediatly - race conditions
3534 retransmit after timeout - yes
3536 wait for packet, then exit
3538 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3539 return 0; /* I choose simply exiting. */
3541 if (*result_count
<= 0)
3545 warning (_("RMT ERROR : failed to get remote thread list."));
3548 return result
; /* break; */
3550 if (*result_count
> result_limit
)
3553 warning (_("RMT ERROR: threadlist response longer than requested."));
3559 /* Fetch the list of remote threads, with the qL packet, and call
3560 STEPFUNCTION for each thread found. Stops iterating and returns 1
3561 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3562 STEPFUNCTION returns false. If the packet is not supported,
3566 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction
,
3567 void *context
, int looplimit
)
3569 struct remote_state
*rs
= get_remote_state ();
3570 int done
, i
, result_count
;
3578 if (loopcount
++ > looplimit
)
3581 warning (_("Remote fetch threadlist -infinite loop-."));
3584 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
3585 MAXTHREADLISTRESULTS
,
3586 &done
, &result_count
,
3587 rs
->resultthreadlist
);
3590 /* Clear for later iterations. */
3592 /* Setup to resume next batch of thread references, set nextthread. */
3593 if (result_count
>= 1)
3594 copy_threadref (&rs
->nextthread
,
3595 &rs
->resultthreadlist
[result_count
- 1]);
3597 while (result_count
--)
3599 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
3609 /* A thread found on the remote target. */
3613 explicit thread_item (ptid_t ptid_
)
3617 thread_item (thread_item
&&other
) = default;
3618 thread_item
&operator= (thread_item
&&other
) = default;
3620 DISABLE_COPY_AND_ASSIGN (thread_item
);
3622 /* The thread's PTID. */
3625 /* The thread's extra info. */
3628 /* The thread's name. */
3631 /* The core the thread was running on. -1 if not known. */
3634 /* The thread handle associated with the thread. */
3635 gdb::byte_vector thread_handle
;
3638 /* Context passed around to the various methods listing remote
3639 threads. As new threads are found, they're added to the ITEMS
3642 struct threads_listing_context
3644 /* Return true if this object contains an entry for a thread with ptid
3647 bool contains_thread (ptid_t ptid
) const
3649 auto match_ptid
= [&] (const thread_item
&item
)
3651 return item
.ptid
== ptid
;
3654 auto it
= std::find_if (this->items
.begin (),
3658 return it
!= this->items
.end ();
3661 /* Remove the thread with ptid PTID. */
3663 void remove_thread (ptid_t ptid
)
3665 auto match_ptid
= [&] (const thread_item
&item
)
3667 return item
.ptid
== ptid
;
3670 auto it
= std::remove_if (this->items
.begin (),
3674 if (it
!= this->items
.end ())
3675 this->items
.erase (it
);
3678 /* The threads found on the remote target. */
3679 std::vector
<thread_item
> items
;
3683 remote_newthread_step (threadref
*ref
, void *data
)
3685 struct threads_listing_context
*context
3686 = (struct threads_listing_context
*) data
;
3687 int pid
= inferior_ptid
.pid ();
3688 int lwp
= threadref_to_int (ref
);
3689 ptid_t
ptid (pid
, lwp
);
3691 context
->items
.emplace_back (ptid
);
3693 return 1; /* continue iterator */
3696 #define CRAZY_MAX_THREADS 1000
3699 remote_target::remote_current_thread (ptid_t oldpid
)
3701 struct remote_state
*rs
= get_remote_state ();
3704 getpkt (&rs
->buf
, 0);
3705 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3710 result
= read_ptid (&rs
->buf
[2], &obuf
);
3712 remote_debug_printf ("warning: garbage in qC reply");
3720 /* List remote threads using the deprecated qL packet. */
3723 remote_target::remote_get_threads_with_ql (threads_listing_context
*context
)
3725 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3726 CRAZY_MAX_THREADS
) >= 0)
3732 #if defined(HAVE_LIBEXPAT)
3735 start_thread (struct gdb_xml_parser
*parser
,
3736 const struct gdb_xml_element
*element
,
3738 std::vector
<gdb_xml_value
> &attributes
)
3740 struct threads_listing_context
*data
3741 = (struct threads_listing_context
*) user_data
;
3742 struct gdb_xml_value
*attr
;
3744 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3745 ptid_t ptid
= read_ptid (id
, NULL
);
3747 data
->items
.emplace_back (ptid
);
3748 thread_item
&item
= data
->items
.back ();
3750 attr
= xml_find_attribute (attributes
, "core");
3752 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3754 attr
= xml_find_attribute (attributes
, "name");
3756 item
.name
= (const char *) attr
->value
.get ();
3758 attr
= xml_find_attribute (attributes
, "handle");
3760 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3764 end_thread (struct gdb_xml_parser
*parser
,
3765 const struct gdb_xml_element
*element
,
3766 void *user_data
, const char *body_text
)
3768 struct threads_listing_context
*data
3769 = (struct threads_listing_context
*) user_data
;
3771 if (body_text
!= NULL
&& *body_text
!= '\0')
3772 data
->items
.back ().extra
= body_text
;
3775 const struct gdb_xml_attribute thread_attributes
[] = {
3776 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3777 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3778 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3779 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3780 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3783 const struct gdb_xml_element thread_children
[] = {
3784 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3787 const struct gdb_xml_element threads_children
[] = {
3788 { "thread", thread_attributes
, thread_children
,
3789 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3790 start_thread
, end_thread
},
3791 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3794 const struct gdb_xml_element threads_elements
[] = {
3795 { "threads", NULL
, threads_children
,
3796 GDB_XML_EF_NONE
, NULL
, NULL
},
3797 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3802 /* List remote threads using qXfer:threads:read. */
3805 remote_target::remote_get_threads_with_qxfer (threads_listing_context
*context
)
3807 #if defined(HAVE_LIBEXPAT)
3808 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3810 gdb::optional
<gdb::char_vector
> xml
3811 = target_read_stralloc (this, TARGET_OBJECT_THREADS
, NULL
);
3813 if (xml
&& (*xml
)[0] != '\0')
3815 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3816 threads_elements
, xml
->data (), context
);
3826 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3829 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context
*context
)
3831 struct remote_state
*rs
= get_remote_state ();
3833 if (rs
->use_threadinfo_query
)
3837 putpkt ("qfThreadInfo");
3838 getpkt (&rs
->buf
, 0);
3839 bufp
= rs
->buf
.data ();
3840 if (bufp
[0] != '\0') /* q packet recognized */
3842 while (*bufp
++ == 'm') /* reply contains one or more TID */
3846 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3847 context
->items
.emplace_back (ptid
);
3849 while (*bufp
++ == ','); /* comma-separated list */
3850 putpkt ("qsThreadInfo");
3851 getpkt (&rs
->buf
, 0);
3852 bufp
= rs
->buf
.data ();
3858 /* Packet not recognized. */
3859 rs
->use_threadinfo_query
= 0;
3866 /* Return true if INF only has one non-exited thread. */
3869 has_single_non_exited_thread (inferior
*inf
)
3872 for (thread_info
*tp ATTRIBUTE_UNUSED
: inf
->non_exited_threads ())
3878 /* Implement the to_update_thread_list function for the remote
3882 remote_target::update_thread_list ()
3884 struct threads_listing_context context
;
3887 /* We have a few different mechanisms to fetch the thread list. Try
3888 them all, starting with the most preferred one first, falling
3889 back to older methods. */
3890 if (remote_get_threads_with_qxfer (&context
)
3891 || remote_get_threads_with_qthreadinfo (&context
)
3892 || remote_get_threads_with_ql (&context
))
3896 if (context
.items
.empty ()
3897 && remote_thread_always_alive (inferior_ptid
))
3899 /* Some targets don't really support threads, but still
3900 reply an (empty) thread list in response to the thread
3901 listing packets, instead of replying "packet not
3902 supported". Exit early so we don't delete the main
3907 /* CONTEXT now holds the current thread list on the remote
3908 target end. Delete GDB-side threads no longer found on the
3910 for (thread_info
*tp
: all_threads_safe ())
3912 if (tp
->inf
->process_target () != this)
3915 if (!context
.contains_thread (tp
->ptid
))
3917 /* Do not remove the thread if it is the last thread in
3918 the inferior. This situation happens when we have a
3919 pending exit process status to process. Otherwise we
3920 may end up with a seemingly live inferior (i.e. pid
3921 != 0) that has no threads. */
3922 if (has_single_non_exited_thread (tp
->inf
))
3930 /* Remove any unreported fork child threads from CONTEXT so
3931 that we don't interfere with follow fork, which is where
3932 creation of such threads is handled. */
3933 remove_new_fork_children (&context
);
3935 /* And now add threads we don't know about yet to our list. */
3936 for (thread_item
&item
: context
.items
)
3938 if (item
.ptid
!= null_ptid
)
3940 /* In non-stop mode, we assume new found threads are
3941 executing until proven otherwise with a stop reply.
3942 In all-stop, we can only get here if all threads are
3944 int executing
= target_is_non_stop_p () ? 1 : 0;
3946 remote_notice_new_inferior (item
.ptid
, executing
);
3948 thread_info
*tp
= find_thread_ptid (this, item
.ptid
);
3949 remote_thread_info
*info
= get_remote_thread_info (tp
);
3950 info
->core
= item
.core
;
3951 info
->extra
= std::move (item
.extra
);
3952 info
->name
= std::move (item
.name
);
3953 info
->thread_handle
= std::move (item
.thread_handle
);
3960 /* If no thread listing method is supported, then query whether
3961 each known thread is alive, one by one, with the T packet.
3962 If the target doesn't support threads at all, then this is a
3963 no-op. See remote_thread_alive. */
3969 * Collect a descriptive string about the given thread.
3970 * The target may say anything it wants to about the thread
3971 * (typically info about its blocked / runnable state, name, etc.).
3972 * This string will appear in the info threads display.
3974 * Optional: targets are not required to implement this function.
3978 remote_target::extra_thread_info (thread_info
*tp
)
3980 struct remote_state
*rs
= get_remote_state ();
3983 struct gdb_ext_thread_info threadinfo
;
3985 if (rs
->remote_desc
== 0) /* paranoia */
3986 internal_error (__FILE__
, __LINE__
,
3987 _("remote_threads_extra_info"));
3989 if (tp
->ptid
== magic_null_ptid
3990 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
3991 /* This is the main thread which was added by GDB. The remote
3992 server doesn't know about it. */
3995 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
3997 /* If already have cached info, use it. */
3998 if (!extra
.empty ())
3999 return extra
.c_str ();
4001 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
4003 /* If we're using qXfer:threads:read, then the extra info is
4004 included in the XML. So if we didn't have anything cached,
4005 it's because there's really no extra info. */
4009 if (rs
->use_threadextra_query
)
4011 char *b
= rs
->buf
.data ();
4012 char *endb
= b
+ get_remote_packet_size ();
4014 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
4016 write_ptid (b
, endb
, tp
->ptid
);
4019 getpkt (&rs
->buf
, 0);
4020 if (rs
->buf
[0] != 0)
4022 extra
.resize (strlen (rs
->buf
.data ()) / 2);
4023 hex2bin (rs
->buf
.data (), (gdb_byte
*) &extra
[0], extra
.size ());
4024 return extra
.c_str ();
4028 /* If the above query fails, fall back to the old method. */
4029 rs
->use_threadextra_query
= 0;
4030 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
4031 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
4032 int_to_threadref (&id
, tp
->ptid
.lwp ());
4033 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
4034 if (threadinfo
.active
)
4036 if (*threadinfo
.shortname
)
4037 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
4038 if (*threadinfo
.display
)
4040 if (!extra
.empty ())
4042 string_appendf (extra
, " State: %s", threadinfo
.display
);
4044 if (*threadinfo
.more_display
)
4046 if (!extra
.empty ())
4048 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
4050 return extra
.c_str ();
4057 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
4058 struct static_tracepoint_marker
*marker
)
4060 struct remote_state
*rs
= get_remote_state ();
4061 char *p
= rs
->buf
.data ();
4063 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
4065 p
+= hexnumstr (p
, addr
);
4067 getpkt (&rs
->buf
, 0);
4068 p
= rs
->buf
.data ();
4071 error (_("Remote failure reply: %s"), p
);
4075 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
4082 std::vector
<static_tracepoint_marker
>
4083 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
4085 struct remote_state
*rs
= get_remote_state ();
4086 std::vector
<static_tracepoint_marker
> markers
;
4088 static_tracepoint_marker marker
;
4090 /* Ask for a first packet of static tracepoint marker
4093 getpkt (&rs
->buf
, 0);
4094 p
= rs
->buf
.data ();
4096 error (_("Remote failure reply: %s"), p
);
4102 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
4104 if (strid
== NULL
|| marker
.str_id
== strid
)
4105 markers
.push_back (std::move (marker
));
4107 while (*p
++ == ','); /* comma-separated list */
4108 /* Ask for another packet of static tracepoint definition. */
4110 getpkt (&rs
->buf
, 0);
4111 p
= rs
->buf
.data ();
4118 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4121 remote_target::get_ada_task_ptid (long lwp
, long thread
)
4123 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
4127 /* Restart the remote side; this is an extended protocol operation. */
4130 remote_target::extended_remote_restart ()
4132 struct remote_state
*rs
= get_remote_state ();
4134 /* Send the restart command; for reasons I don't understand the
4135 remote side really expects a number after the "R". */
4136 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "R%x", 0);
4139 remote_fileio_reset ();
4142 /* Clean up connection to a remote debugger. */
4145 remote_target::close ()
4147 /* Make sure we leave stdin registered in the event loop. */
4150 trace_reset_local_state ();
4155 remote_target::~remote_target ()
4157 struct remote_state
*rs
= get_remote_state ();
4159 /* Check for NULL because we may get here with a partially
4160 constructed target/connection. */
4161 if (rs
->remote_desc
== nullptr)
4164 serial_close (rs
->remote_desc
);
4166 /* We are destroying the remote target, so we should discard
4167 everything of this target. */
4168 discard_pending_stop_replies_in_queue ();
4170 if (rs
->remote_async_inferior_event_token
)
4171 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4173 delete rs
->notif_state
;
4176 /* Query the remote side for the text, data and bss offsets. */
4179 remote_target::get_offsets ()
4181 struct remote_state
*rs
= get_remote_state ();
4184 int lose
, num_segments
= 0, do_sections
, do_segments
;
4185 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4187 if (current_program_space
->symfile_object_file
== NULL
)
4190 putpkt ("qOffsets");
4191 getpkt (&rs
->buf
, 0);
4192 buf
= rs
->buf
.data ();
4194 if (buf
[0] == '\000')
4195 return; /* Return silently. Stub doesn't support
4199 warning (_("Remote failure reply: %s"), buf
);
4203 /* Pick up each field in turn. This used to be done with scanf, but
4204 scanf will make trouble if CORE_ADDR size doesn't match
4205 conversion directives correctly. The following code will work
4206 with any size of CORE_ADDR. */
4207 text_addr
= data_addr
= bss_addr
= 0;
4211 if (startswith (ptr
, "Text="))
4214 /* Don't use strtol, could lose on big values. */
4215 while (*ptr
&& *ptr
!= ';')
4216 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4218 if (startswith (ptr
, ";Data="))
4221 while (*ptr
&& *ptr
!= ';')
4222 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4227 if (!lose
&& startswith (ptr
, ";Bss="))
4230 while (*ptr
&& *ptr
!= ';')
4231 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4233 if (bss_addr
!= data_addr
)
4234 warning (_("Target reported unsupported offsets: %s"), buf
);
4239 else if (startswith (ptr
, "TextSeg="))
4242 /* Don't use strtol, could lose on big values. */
4243 while (*ptr
&& *ptr
!= ';')
4244 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4247 if (startswith (ptr
, ";DataSeg="))
4250 while (*ptr
&& *ptr
!= ';')
4251 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4259 error (_("Malformed response to offset query, %s"), buf
);
4260 else if (*ptr
!= '\0')
4261 warning (_("Target reported unsupported offsets: %s"), buf
);
4263 objfile
*objf
= current_program_space
->symfile_object_file
;
4264 section_offsets offs
= objf
->section_offsets
;
4266 symfile_segment_data_up data
= get_symfile_segment_data (objf
->obfd
);
4267 do_segments
= (data
!= NULL
);
4268 do_sections
= num_segments
== 0;
4270 if (num_segments
> 0)
4272 segments
[0] = text_addr
;
4273 segments
[1] = data_addr
;
4275 /* If we have two segments, we can still try to relocate everything
4276 by assuming that the .text and .data offsets apply to the whole
4277 text and data segments. Convert the offsets given in the packet
4278 to base addresses for symfile_map_offsets_to_segments. */
4279 else if (data
!= nullptr && data
->segments
.size () == 2)
4281 segments
[0] = data
->segments
[0].base
+ text_addr
;
4282 segments
[1] = data
->segments
[1].base
+ data_addr
;
4285 /* If the object file has only one segment, assume that it is text
4286 rather than data; main programs with no writable data are rare,
4287 but programs with no code are useless. Of course the code might
4288 have ended up in the data segment... to detect that we would need
4289 the permissions here. */
4290 else if (data
&& data
->segments
.size () == 1)
4292 segments
[0] = data
->segments
[0].base
+ text_addr
;
4295 /* There's no way to relocate by segment. */
4301 int ret
= symfile_map_offsets_to_segments (objf
->obfd
,
4303 num_segments
, segments
);
4305 if (ret
== 0 && !do_sections
)
4306 error (_("Can not handle qOffsets TextSeg "
4307 "response with this symbol file"));
4315 offs
[SECT_OFF_TEXT (objf
)] = text_addr
;
4317 /* This is a temporary kludge to force data and bss to use the
4318 same offsets because that's what nlmconv does now. The real
4319 solution requires changes to the stub and remote.c that I
4320 don't have time to do right now. */
4322 offs
[SECT_OFF_DATA (objf
)] = data_addr
;
4323 offs
[SECT_OFF_BSS (objf
)] = data_addr
;
4326 objfile_relocate (objf
, offs
);
4329 /* Send interrupt_sequence to remote target. */
4332 remote_target::send_interrupt_sequence ()
4334 struct remote_state
*rs
= get_remote_state ();
4336 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4337 remote_serial_write ("\x03", 1);
4338 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4339 serial_send_break (rs
->remote_desc
);
4340 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4342 serial_send_break (rs
->remote_desc
);
4343 remote_serial_write ("g", 1);
4346 internal_error (__FILE__
, __LINE__
,
4347 _("Invalid value for interrupt_sequence_mode: %s."),
4348 interrupt_sequence_mode
);
4352 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4353 and extract the PTID. Returns NULL_PTID if not found. */
4356 stop_reply_extract_thread (const char *stop_reply
)
4358 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4362 /* Txx r:val ; r:val (...) */
4365 /* Look for "register" named "thread". */
4370 p1
= strchr (p
, ':');
4374 if (strncmp (p
, "thread", p1
- p
) == 0)
4375 return read_ptid (++p1
, &p
);
4377 p1
= strchr (p
, ';');
4389 /* Determine the remote side's current thread. If we have a stop
4390 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4391 "thread" register we can extract the current thread from. If not,
4392 ask the remote which is the current thread with qC. The former
4393 method avoids a roundtrip. */
4396 remote_target::get_current_thread (const char *wait_status
)
4398 ptid_t ptid
= null_ptid
;
4400 /* Note we don't use remote_parse_stop_reply as that makes use of
4401 the target architecture, which we haven't yet fully determined at
4403 if (wait_status
!= NULL
)
4404 ptid
= stop_reply_extract_thread (wait_status
);
4405 if (ptid
== null_ptid
)
4406 ptid
= remote_current_thread (inferior_ptid
);
4411 /* Query the remote target for which is the current thread/process,
4412 add it to our tables, and update INFERIOR_PTID. The caller is
4413 responsible for setting the state such that the remote end is ready
4414 to return the current thread.
4416 This function is called after handling the '?' or 'vRun' packets,
4417 whose response is a stop reply from which we can also try
4418 extracting the thread. If the target doesn't support the explicit
4419 qC query, we infer the current thread from that stop reply, passed
4420 in in WAIT_STATUS, which may be NULL.
4422 The function returns pointer to the main thread of the inferior. */
4425 remote_target::add_current_inferior_and_thread (const char *wait_status
)
4427 struct remote_state
*rs
= get_remote_state ();
4428 bool fake_pid_p
= false;
4430 switch_to_no_thread ();
4432 /* Now, if we have thread information, update the current thread's
4434 ptid_t curr_ptid
= get_current_thread (wait_status
);
4436 if (curr_ptid
!= null_ptid
)
4438 if (!remote_multi_process_p (rs
))
4443 /* Without this, some commands which require an active target
4444 (such as kill) won't work. This variable serves (at least)
4445 double duty as both the pid of the target process (if it has
4446 such), and as a flag indicating that a target is active. */
4447 curr_ptid
= magic_null_ptid
;
4451 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4453 /* Add the main thread and switch to it. Don't try reading
4454 registers yet, since we haven't fetched the target description
4456 thread_info
*tp
= add_thread_silent (this, curr_ptid
);
4457 switch_to_thread_no_regs (tp
);
4462 /* Print info about a thread that was found already stopped on
4466 print_one_stopped_thread (struct thread_info
*thread
)
4468 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
4470 switch_to_thread (thread
);
4471 thread
->suspend
.stop_pc
= get_frame_pc (get_current_frame ());
4472 set_current_sal_from_frame (get_current_frame ());
4474 thread
->suspend
.waitstatus_pending_p
= 0;
4476 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
4478 enum gdb_signal sig
= ws
->value
.sig
;
4480 if (signal_print_state (sig
))
4481 gdb::observers::signal_received
.notify (sig
);
4483 gdb::observers::normal_stop
.notify (NULL
, 1);
4486 /* Process all initial stop replies the remote side sent in response
4487 to the ? packet. These indicate threads that were already stopped
4488 on initial connection. We mark these threads as stopped and print
4489 their current frame before giving the user the prompt. */
4492 remote_target::process_initial_stop_replies (int from_tty
)
4494 int pending_stop_replies
= stop_reply_queue_length ();
4495 struct thread_info
*selected
= NULL
;
4496 struct thread_info
*lowest_stopped
= NULL
;
4497 struct thread_info
*first
= NULL
;
4499 /* Consume the initial pending events. */
4500 while (pending_stop_replies
-- > 0)
4502 ptid_t waiton_ptid
= minus_one_ptid
;
4504 struct target_waitstatus ws
;
4505 int ignore_event
= 0;
4507 memset (&ws
, 0, sizeof (ws
));
4508 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4510 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4514 case TARGET_WAITKIND_IGNORE
:
4515 case TARGET_WAITKIND_NO_RESUMED
:
4516 case TARGET_WAITKIND_SIGNALLED
:
4517 case TARGET_WAITKIND_EXITED
:
4518 /* We shouldn't see these, but if we do, just ignore. */
4519 remote_debug_printf ("event ignored");
4523 case TARGET_WAITKIND_EXECD
:
4524 xfree (ws
.value
.execd_pathname
);
4533 thread_info
*evthread
= find_thread_ptid (this, event_ptid
);
4535 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4537 enum gdb_signal sig
= ws
.value
.sig
;
4539 /* Stubs traditionally report SIGTRAP as initial signal,
4540 instead of signal 0. Suppress it. */
4541 if (sig
== GDB_SIGNAL_TRAP
)
4543 evthread
->suspend
.stop_signal
= sig
;
4547 evthread
->suspend
.waitstatus
= ws
;
4549 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4550 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4551 evthread
->suspend
.waitstatus_pending_p
= 1;
4553 set_executing (this, event_ptid
, false);
4554 set_running (this, event_ptid
, false);
4555 get_remote_thread_info (evthread
)->set_not_resumed ();
4558 /* "Notice" the new inferiors before anything related to
4559 registers/memory. */
4560 for (inferior
*inf
: all_non_exited_inferiors (this))
4562 inf
->needs_setup
= 1;
4566 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4567 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4572 /* If all-stop on top of non-stop, pause all threads. Note this
4573 records the threads' stop pc, so must be done after "noticing"
4577 stop_all_threads ();
4579 /* If all threads of an inferior were already stopped, we
4580 haven't setup the inferior yet. */
4581 for (inferior
*inf
: all_non_exited_inferiors (this))
4583 if (inf
->needs_setup
)
4585 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4586 switch_to_thread_no_regs (thread
);
4592 /* Now go over all threads that are stopped, and print their current
4593 frame. If all-stop, then if there's a signalled thread, pick
4595 for (thread_info
*thread
: all_non_exited_threads (this))
4601 thread
->set_running (false);
4602 else if (thread
->state
!= THREAD_STOPPED
)
4605 if (selected
== NULL
4606 && thread
->suspend
.waitstatus_pending_p
)
4609 if (lowest_stopped
== NULL
4610 || thread
->inf
->num
< lowest_stopped
->inf
->num
4611 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4612 lowest_stopped
= thread
;
4615 print_one_stopped_thread (thread
);
4618 /* In all-stop, we only print the status of one thread, and leave
4619 others with their status pending. */
4622 thread_info
*thread
= selected
;
4624 thread
= lowest_stopped
;
4628 print_one_stopped_thread (thread
);
4631 /* For "info program". */
4632 thread_info
*thread
= inferior_thread ();
4633 if (thread
->state
== THREAD_STOPPED
)
4634 set_last_target_status (this, inferior_ptid
, thread
->suspend
.waitstatus
);
4637 /* Start the remote connection and sync state. */
4640 remote_target::start_remote (int from_tty
, int extended_p
)
4642 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
4644 struct remote_state
*rs
= get_remote_state ();
4645 struct packet_config
*noack_config
;
4647 /* Signal other parts that we're going through the initial setup,
4648 and so things may not be stable yet. E.g., we don't try to
4649 install tracepoints until we've relocated symbols. Also, a
4650 Ctrl-C before we're connected and synced up can't interrupt the
4651 target. Instead, it offers to drop the (potentially wedged)
4653 rs
->starting_up
= 1;
4657 if (interrupt_on_connect
)
4658 send_interrupt_sequence ();
4660 /* Ack any packet which the remote side has already sent. */
4661 remote_serial_write ("+", 1);
4663 /* The first packet we send to the target is the optional "supported
4664 packets" request. If the target can answer this, it will tell us
4665 which later probes to skip. */
4666 remote_query_supported ();
4668 /* If the stub wants to get a QAllow, compose one and send it. */
4669 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4672 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4673 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4674 as a reply to known packet. For packet "vFile:setfs:" it is an
4675 invalid reply and GDB would return error in
4676 remote_hostio_set_filesystem, making remote files access impossible.
4677 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4678 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4680 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4682 putpkt (v_mustreplyempty
);
4683 getpkt (&rs
->buf
, 0);
4684 if (strcmp (rs
->buf
.data (), "OK") == 0)
4685 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4686 else if (strcmp (rs
->buf
.data (), "") != 0)
4687 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4691 /* Next, we possibly activate noack mode.
4693 If the QStartNoAckMode packet configuration is set to AUTO,
4694 enable noack mode if the stub reported a wish for it with
4697 If set to TRUE, then enable noack mode even if the stub didn't
4698 report it in qSupported. If the stub doesn't reply OK, the
4699 session ends with an error.
4701 If FALSE, then don't activate noack mode, regardless of what the
4702 stub claimed should be the default with qSupported. */
4704 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4705 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4707 putpkt ("QStartNoAckMode");
4708 getpkt (&rs
->buf
, 0);
4709 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4715 /* Tell the remote that we are using the extended protocol. */
4717 getpkt (&rs
->buf
, 0);
4720 /* Let the target know which signals it is allowed to pass down to
4722 update_signals_program_target ();
4724 /* Next, if the target can specify a description, read it. We do
4725 this before anything involving memory or registers. */
4726 target_find_description ();
4728 /* Next, now that we know something about the target, update the
4729 address spaces in the program spaces. */
4730 update_address_spaces ();
4732 /* On OSs where the list of libraries is global to all
4733 processes, we fetch them early. */
4734 if (gdbarch_has_global_solist (target_gdbarch ()))
4735 solib_add (NULL
, from_tty
, auto_solib_add
);
4737 if (target_is_non_stop_p ())
4739 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4740 error (_("Non-stop mode requested, but remote "
4741 "does not support non-stop"));
4743 putpkt ("QNonStop:1");
4744 getpkt (&rs
->buf
, 0);
4746 if (strcmp (rs
->buf
.data (), "OK") != 0)
4747 error (_("Remote refused setting non-stop mode with: %s"),
4750 /* Find about threads and processes the stub is already
4751 controlling. We default to adding them in the running state.
4752 The '?' query below will then tell us about which threads are
4754 this->update_thread_list ();
4756 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4758 /* Don't assume that the stub can operate in all-stop mode.
4759 Request it explicitly. */
4760 putpkt ("QNonStop:0");
4761 getpkt (&rs
->buf
, 0);
4763 if (strcmp (rs
->buf
.data (), "OK") != 0)
4764 error (_("Remote refused setting all-stop mode with: %s"),
4768 /* Upload TSVs regardless of whether the target is running or not. The
4769 remote stub, such as GDBserver, may have some predefined or builtin
4770 TSVs, even if the target is not running. */
4771 if (get_trace_status (current_trace_status ()) != -1)
4773 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4775 upload_trace_state_variables (&uploaded_tsvs
);
4776 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4779 /* Check whether the target is running now. */
4781 getpkt (&rs
->buf
, 0);
4783 if (!target_is_non_stop_p ())
4785 char *wait_status
= NULL
;
4787 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4790 error (_("The target is not running (try extended-remote?)"));
4792 /* We're connected, but not running. Drop out before we
4793 call start_remote. */
4794 rs
->starting_up
= 0;
4799 /* Save the reply for later. */
4800 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4801 strcpy (wait_status
, rs
->buf
.data ());
4804 /* Fetch thread list. */
4805 target_update_thread_list ();
4807 /* Let the stub know that we want it to return the thread. */
4808 set_continue_thread (minus_one_ptid
);
4810 if (thread_count (this) == 0)
4812 /* Target has no concept of threads at all. GDB treats
4813 non-threaded target as single-threaded; add a main
4815 thread_info
*tp
= add_current_inferior_and_thread (wait_status
);
4816 get_remote_thread_info (tp
)->set_resumed ();
4820 /* We have thread information; select the thread the target
4821 says should be current. If we're reconnecting to a
4822 multi-threaded program, this will ideally be the thread
4823 that last reported an event before GDB disconnected. */
4824 ptid_t curr_thread
= get_current_thread (wait_status
);
4825 if (curr_thread
== null_ptid
)
4827 /* Odd... The target was able to list threads, but not
4828 tell us which thread was current (no "thread"
4829 register in T stop reply?). Just pick the first
4830 thread in the thread list then. */
4832 remote_debug_printf ("warning: couldn't determine remote "
4833 "current thread; picking first in list.");
4835 for (thread_info
*tp
: all_non_exited_threads (this,
4838 switch_to_thread (tp
);
4843 switch_to_thread (find_thread_ptid (this, curr_thread
));
4846 /* init_wait_for_inferior should be called before get_offsets in order
4847 to manage `inserted' flag in bp loc in a correct state.
4848 breakpoint_init_inferior, called from init_wait_for_inferior, set
4849 `inserted' flag to 0, while before breakpoint_re_set, called from
4850 start_remote, set `inserted' flag to 1. In the initialization of
4851 inferior, breakpoint_init_inferior should be called first, and then
4852 breakpoint_re_set can be called. If this order is broken, state of
4853 `inserted' flag is wrong, and cause some problems on breakpoint
4855 init_wait_for_inferior ();
4857 get_offsets (); /* Get text, data & bss offsets. */
4859 /* If we could not find a description using qXfer, and we know
4860 how to do it some other way, try again. This is not
4861 supported for non-stop; it could be, but it is tricky if
4862 there are no stopped threads when we connect. */
4863 if (remote_read_description_p (this)
4864 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4866 target_clear_description ();
4867 target_find_description ();
4870 /* Use the previously fetched status. */
4871 gdb_assert (wait_status
!= NULL
);
4872 strcpy (rs
->buf
.data (), wait_status
);
4873 rs
->cached_wait_status
= 1;
4875 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4879 /* Clear WFI global state. Do this before finding about new
4880 threads and inferiors, and setting the current inferior.
4881 Otherwise we would clear the proceed status of the current
4882 inferior when we want its stop_soon state to be preserved
4883 (see notice_new_inferior). */
4884 init_wait_for_inferior ();
4886 /* In non-stop, we will either get an "OK", meaning that there
4887 are no stopped threads at this time; or, a regular stop
4888 reply. In the latter case, there may be more than one thread
4889 stopped --- we pull them all out using the vStopped
4891 if (strcmp (rs
->buf
.data (), "OK") != 0)
4893 struct notif_client
*notif
= ¬if_client_stop
;
4895 /* remote_notif_get_pending_replies acks this one, and gets
4897 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4898 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4899 remote_notif_get_pending_events (notif
);
4902 if (thread_count (this) == 0)
4905 error (_("The target is not running (try extended-remote?)"));
4907 /* We're connected, but not running. Drop out before we
4908 call start_remote. */
4909 rs
->starting_up
= 0;
4913 /* Report all signals during attach/startup. */
4916 /* If there are already stopped threads, mark them stopped and
4917 report their stops before giving the prompt to the user. */
4918 process_initial_stop_replies (from_tty
);
4920 if (target_can_async_p ())
4924 /* If we connected to a live target, do some additional setup. */
4925 if (target_has_execution ())
4927 /* No use without a symbol-file. */
4928 if (current_program_space
->symfile_object_file
)
4929 remote_check_symbols ();
4932 /* Possibly the target has been engaged in a trace run started
4933 previously; find out where things are at. */
4934 if (get_trace_status (current_trace_status ()) != -1)
4936 struct uploaded_tp
*uploaded_tps
= NULL
;
4938 if (current_trace_status ()->running
)
4939 printf_filtered (_("Trace is already running on the target.\n"));
4941 upload_tracepoints (&uploaded_tps
);
4943 merge_uploaded_tracepoints (&uploaded_tps
);
4946 /* Possibly the target has been engaged in a btrace record started
4947 previously; find out where things are at. */
4948 remote_btrace_maybe_reopen ();
4950 /* The thread and inferior lists are now synchronized with the
4951 target, our symbols have been relocated, and we're merged the
4952 target's tracepoints with ours. We're done with basic start
4954 rs
->starting_up
= 0;
4956 /* Maybe breakpoints are global and need to be inserted now. */
4957 if (breakpoints_should_be_inserted_now ())
4958 insert_breakpoints ();
4962 remote_target::connection_string ()
4964 remote_state
*rs
= get_remote_state ();
4966 if (rs
->remote_desc
->name
!= NULL
)
4967 return rs
->remote_desc
->name
;
4972 /* Open a connection to a remote debugger.
4973 NAME is the filename used for communication. */
4976 remote_target::open (const char *name
, int from_tty
)
4978 open_1 (name
, from_tty
, 0);
4981 /* Open a connection to a remote debugger using the extended
4982 remote gdb protocol. NAME is the filename used for communication. */
4985 extended_remote_target::open (const char *name
, int from_tty
)
4987 open_1 (name
, from_tty
, 1 /*extended_p */);
4990 /* Reset all packets back to "unknown support". Called when opening a
4991 new connection to a remote target. */
4994 reset_all_packet_configs_support (void)
4998 for (i
= 0; i
< PACKET_MAX
; i
++)
4999 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5002 /* Initialize all packet configs. */
5005 init_all_packet_configs (void)
5009 for (i
= 0; i
< PACKET_MAX
; i
++)
5011 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
5012 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
5016 /* Symbol look-up. */
5019 remote_target::remote_check_symbols ()
5024 /* The remote side has no concept of inferiors that aren't running
5025 yet, it only knows about running processes. If we're connected
5026 but our current inferior is not running, we should not invite the
5027 remote target to request symbol lookups related to its
5028 (unrelated) current process. */
5029 if (!target_has_execution ())
5032 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
5035 /* Make sure the remote is pointing at the right process. Note
5036 there's no way to select "no process". */
5037 set_general_process ();
5039 /* Allocate a message buffer. We can't reuse the input buffer in RS,
5040 because we need both at the same time. */
5041 gdb::char_vector
msg (get_remote_packet_size ());
5042 gdb::char_vector
reply (get_remote_packet_size ());
5044 /* Invite target to request symbol lookups. */
5046 putpkt ("qSymbol::");
5048 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
5050 while (startswith (reply
.data (), "qSymbol:"))
5052 struct bound_minimal_symbol sym
;
5055 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
5058 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
5059 if (sym
.minsym
== NULL
)
5060 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
5064 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5065 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
5067 /* If this is a function address, return the start of code
5068 instead of any data function descriptor. */
5069 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
5071 current_top_target ());
5073 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
5074 phex_nz (sym_addr
, addr_size
), &reply
[8]);
5077 putpkt (msg
.data ());
5082 static struct serial
*
5083 remote_serial_open (const char *name
)
5085 static int udp_warning
= 0;
5087 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
5088 of in ser-tcp.c, because it is the remote protocol assuming that the
5089 serial connection is reliable and not the serial connection promising
5091 if (!udp_warning
&& startswith (name
, "udp:"))
5093 warning (_("The remote protocol may be unreliable over UDP.\n"
5094 "Some events may be lost, rendering further debugging "
5099 return serial_open (name
);
5102 /* Inform the target of our permission settings. The permission flags
5103 work without this, but if the target knows the settings, it can do
5104 a couple things. First, it can add its own check, to catch cases
5105 that somehow manage to get by the permissions checks in target
5106 methods. Second, if the target is wired to disallow particular
5107 settings (for instance, a system in the field that is not set up to
5108 be able to stop at a breakpoint), it can object to any unavailable
5112 remote_target::set_permissions ()
5114 struct remote_state
*rs
= get_remote_state ();
5116 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
5117 "WriteReg:%x;WriteMem:%x;"
5118 "InsertBreak:%x;InsertTrace:%x;"
5119 "InsertFastTrace:%x;Stop:%x",
5120 may_write_registers
, may_write_memory
,
5121 may_insert_breakpoints
, may_insert_tracepoints
,
5122 may_insert_fast_tracepoints
, may_stop
);
5124 getpkt (&rs
->buf
, 0);
5126 /* If the target didn't like the packet, warn the user. Do not try
5127 to undo the user's settings, that would just be maddening. */
5128 if (strcmp (rs
->buf
.data (), "OK") != 0)
5129 warning (_("Remote refused setting permissions with: %s"),
5133 /* This type describes each known response to the qSupported
5135 struct protocol_feature
5137 /* The name of this protocol feature. */
5140 /* The default for this protocol feature. */
5141 enum packet_support default_support
;
5143 /* The function to call when this feature is reported, or after
5144 qSupported processing if the feature is not supported.
5145 The first argument points to this structure. The second
5146 argument indicates whether the packet requested support be
5147 enabled, disabled, or probed (or the default, if this function
5148 is being called at the end of processing and this feature was
5149 not reported). The third argument may be NULL; if not NULL, it
5150 is a NUL-terminated string taken from the packet following
5151 this feature's name and an equals sign. */
5152 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5153 enum packet_support
, const char *);
5155 /* The corresponding packet for this feature. Only used if
5156 FUNC is remote_supported_packet. */
5161 remote_supported_packet (remote_target
*remote
,
5162 const struct protocol_feature
*feature
,
5163 enum packet_support support
,
5164 const char *argument
)
5168 warning (_("Remote qSupported response supplied an unexpected value for"
5169 " \"%s\"."), feature
->name
);
5173 remote_protocol_packets
[feature
->packet
].support
= support
;
5177 remote_target::remote_packet_size (const protocol_feature
*feature
,
5178 enum packet_support support
, const char *value
)
5180 struct remote_state
*rs
= get_remote_state ();
5185 if (support
!= PACKET_ENABLE
)
5188 if (value
== NULL
|| *value
== '\0')
5190 warning (_("Remote target reported \"%s\" without a size."),
5196 packet_size
= strtol (value
, &value_end
, 16);
5197 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5199 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5200 feature
->name
, value
);
5204 /* Record the new maximum packet size. */
5205 rs
->explicit_packet_size
= packet_size
;
5209 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5210 enum packet_support support
, const char *value
)
5212 remote
->remote_packet_size (feature
, support
, value
);
5215 static const struct protocol_feature remote_protocol_features
[] = {
5216 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5217 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5218 PACKET_qXfer_auxv
},
5219 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5220 PACKET_qXfer_exec_file
},
5221 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5222 PACKET_qXfer_features
},
5223 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5224 PACKET_qXfer_libraries
},
5225 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5226 PACKET_qXfer_libraries_svr4
},
5227 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5228 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5229 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5230 PACKET_qXfer_memory_map
},
5231 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5232 PACKET_qXfer_osdata
},
5233 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5234 PACKET_qXfer_threads
},
5235 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5236 PACKET_qXfer_traceframe_info
},
5237 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5238 PACKET_QPassSignals
},
5239 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5240 PACKET_QCatchSyscalls
},
5241 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5242 PACKET_QProgramSignals
},
5243 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5244 PACKET_QSetWorkingDir
},
5245 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5246 PACKET_QStartupWithShell
},
5247 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5248 PACKET_QEnvironmentHexEncoded
},
5249 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5250 PACKET_QEnvironmentReset
},
5251 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5252 PACKET_QEnvironmentUnset
},
5253 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5254 PACKET_QStartNoAckMode
},
5255 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5256 PACKET_multiprocess_feature
},
5257 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5258 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5259 PACKET_qXfer_siginfo_read
},
5260 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5261 PACKET_qXfer_siginfo_write
},
5262 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5263 PACKET_ConditionalTracepoints
},
5264 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5265 PACKET_ConditionalBreakpoints
},
5266 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5267 PACKET_BreakpointCommands
},
5268 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5269 PACKET_FastTracepoints
},
5270 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5271 PACKET_StaticTracepoints
},
5272 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5273 PACKET_InstallInTrace
},
5274 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5275 PACKET_DisconnectedTracing_feature
},
5276 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5278 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5280 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5281 PACKET_TracepointSource
},
5282 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5284 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5285 PACKET_EnableDisableTracepoints_feature
},
5286 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5287 PACKET_qXfer_fdpic
},
5288 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5290 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5291 PACKET_QDisableRandomization
},
5292 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5293 { "QTBuffer:size", PACKET_DISABLE
,
5294 remote_supported_packet
, PACKET_QTBuffer_size
},
5295 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5296 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5297 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5298 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5299 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5300 PACKET_qXfer_btrace
},
5301 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5302 PACKET_qXfer_btrace_conf
},
5303 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5304 PACKET_Qbtrace_conf_bts_size
},
5305 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5306 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5307 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5308 PACKET_fork_event_feature
},
5309 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5310 PACKET_vfork_event_feature
},
5311 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5312 PACKET_exec_event_feature
},
5313 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5314 PACKET_Qbtrace_conf_pt_size
},
5315 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5316 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5317 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5320 static char *remote_support_xml
;
5322 /* Register string appended to "xmlRegisters=" in qSupported query. */
5325 register_remote_support_xml (const char *xml
)
5327 #if defined(HAVE_LIBEXPAT)
5328 if (remote_support_xml
== NULL
)
5329 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5332 char *copy
= xstrdup (remote_support_xml
+ 13);
5334 char *p
= strtok_r (copy
, ",", &saveptr
);
5338 if (strcmp (p
, xml
) == 0)
5345 while ((p
= strtok_r (NULL
, ",", &saveptr
)) != NULL
);
5348 remote_support_xml
= reconcat (remote_support_xml
,
5349 remote_support_xml
, ",", xml
,
5356 remote_query_supported_append (std::string
*msg
, const char *append
)
5360 msg
->append (append
);
5364 remote_target::remote_query_supported ()
5366 struct remote_state
*rs
= get_remote_state ();
5369 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5371 /* The packet support flags are handled differently for this packet
5372 than for most others. We treat an error, a disabled packet, and
5373 an empty response identically: any features which must be reported
5374 to be used will be automatically disabled. An empty buffer
5375 accomplishes this, since that is also the representation for a list
5376 containing no features. */
5379 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5383 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5384 remote_query_supported_append (&q
, "multiprocess+");
5386 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5387 remote_query_supported_append (&q
, "swbreak+");
5388 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5389 remote_query_supported_append (&q
, "hwbreak+");
5391 remote_query_supported_append (&q
, "qRelocInsn+");
5393 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5394 != AUTO_BOOLEAN_FALSE
)
5395 remote_query_supported_append (&q
, "fork-events+");
5396 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5397 != AUTO_BOOLEAN_FALSE
)
5398 remote_query_supported_append (&q
, "vfork-events+");
5399 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5400 != AUTO_BOOLEAN_FALSE
)
5401 remote_query_supported_append (&q
, "exec-events+");
5403 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5404 remote_query_supported_append (&q
, "vContSupported+");
5406 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5407 remote_query_supported_append (&q
, "QThreadEvents+");
5409 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5410 remote_query_supported_append (&q
, "no-resumed+");
5412 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5413 the qSupported:xmlRegisters=i386 handling. */
5414 if (remote_support_xml
!= NULL
5415 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5416 remote_query_supported_append (&q
, remote_support_xml
);
5418 q
= "qSupported:" + q
;
5419 putpkt (q
.c_str ());
5421 getpkt (&rs
->buf
, 0);
5423 /* If an error occured, warn, but do not return - just reset the
5424 buffer to empty and go on to disable features. */
5425 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5428 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5433 memset (seen
, 0, sizeof (seen
));
5435 next
= rs
->buf
.data ();
5438 enum packet_support is_supported
;
5439 char *p
, *end
, *name_end
, *value
;
5441 /* First separate out this item from the rest of the packet. If
5442 there's another item after this, we overwrite the separator
5443 (terminated strings are much easier to work with). */
5445 end
= strchr (p
, ';');
5448 end
= p
+ strlen (p
);
5458 warning (_("empty item in \"qSupported\" response"));
5463 name_end
= strchr (p
, '=');
5466 /* This is a name=value entry. */
5467 is_supported
= PACKET_ENABLE
;
5468 value
= name_end
+ 1;
5477 is_supported
= PACKET_ENABLE
;
5481 is_supported
= PACKET_DISABLE
;
5485 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5489 warning (_("unrecognized item \"%s\" "
5490 "in \"qSupported\" response"), p
);
5496 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5497 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5499 const struct protocol_feature
*feature
;
5502 feature
= &remote_protocol_features
[i
];
5503 feature
->func (this, feature
, is_supported
, value
);
5508 /* If we increased the packet size, make sure to increase the global
5509 buffer size also. We delay this until after parsing the entire
5510 qSupported packet, because this is the same buffer we were
5512 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5513 rs
->buf
.resize (rs
->explicit_packet_size
);
5515 /* Handle the defaults for unmentioned features. */
5516 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5519 const struct protocol_feature
*feature
;
5521 feature
= &remote_protocol_features
[i
];
5522 feature
->func (this, feature
, feature
->default_support
, NULL
);
5526 /* Serial QUIT handler for the remote serial descriptor.
5528 Defers handling a Ctrl-C until we're done with the current
5529 command/response packet sequence, unless:
5531 - We're setting up the connection. Don't send a remote interrupt
5532 request, as we're not fully synced yet. Quit immediately
5535 - The target has been resumed in the foreground
5536 (target_terminal::is_ours is false) with a synchronous resume
5537 packet, and we're blocked waiting for the stop reply, thus a
5538 Ctrl-C should be immediately sent to the target.
5540 - We get a second Ctrl-C while still within the same serial read or
5541 write. In that case the serial is seemingly wedged --- offer to
5544 - We see a second Ctrl-C without target response, after having
5545 previously interrupted the target. In that case the target/stub
5546 is probably wedged --- offer to quit/disconnect.
5550 remote_target::remote_serial_quit_handler ()
5552 struct remote_state
*rs
= get_remote_state ();
5554 if (check_quit_flag ())
5556 /* If we're starting up, we're not fully synced yet. Quit
5558 if (rs
->starting_up
)
5560 else if (rs
->got_ctrlc_during_io
)
5562 if (query (_("The target is not responding to GDB commands.\n"
5563 "Stop debugging it? ")))
5564 remote_unpush_and_throw (this);
5566 /* If ^C has already been sent once, offer to disconnect. */
5567 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5569 /* All-stop protocol, and blocked waiting for stop reply. Send
5570 an interrupt request. */
5571 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5572 target_interrupt ();
5574 rs
->got_ctrlc_during_io
= 1;
5578 /* The remote_target that is current while the quit handler is
5579 overridden with remote_serial_quit_handler. */
5580 static remote_target
*curr_quit_handler_target
;
5583 remote_serial_quit_handler ()
5585 curr_quit_handler_target
->remote_serial_quit_handler ();
5588 /* Remove the remote target from the target stack of each inferior
5589 that is using it. Upper targets depend on it so remove them
5593 remote_unpush_target (remote_target
*target
)
5595 /* We have to unpush the target from all inferiors, even those that
5597 scoped_restore_current_inferior restore_current_inferior
;
5599 for (inferior
*inf
: all_inferiors (target
))
5601 switch_to_inferior_no_thread (inf
);
5602 pop_all_targets_at_and_above (process_stratum
);
5603 generic_mourn_inferior ();
5608 remote_unpush_and_throw (remote_target
*target
)
5610 remote_unpush_target (target
);
5611 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5615 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5617 remote_target
*curr_remote
= get_current_remote_target ();
5620 error (_("To open a remote debug connection, you need to specify what\n"
5621 "serial device is attached to the remote system\n"
5622 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5624 /* If we're connected to a running target, target_preopen will kill it.
5625 Ask this question first, before target_preopen has a chance to kill
5627 if (curr_remote
!= NULL
&& !target_has_execution ())
5630 && !query (_("Already connected to a remote target. Disconnect? ")))
5631 error (_("Still connected."));
5634 /* Here the possibly existing remote target gets unpushed. */
5635 target_preopen (from_tty
);
5637 remote_fileio_reset ();
5638 reopen_exec_file ();
5641 remote_target
*remote
5642 = (extended_p
? new extended_remote_target () : new remote_target ());
5643 target_ops_up
target_holder (remote
);
5645 remote_state
*rs
= remote
->get_remote_state ();
5647 /* See FIXME above. */
5648 if (!target_async_permitted
)
5649 rs
->wait_forever_enabled_p
= 1;
5651 rs
->remote_desc
= remote_serial_open (name
);
5652 if (!rs
->remote_desc
)
5653 perror_with_name (name
);
5655 if (baud_rate
!= -1)
5657 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5659 /* The requested speed could not be set. Error out to
5660 top level after closing remote_desc. Take care to
5661 set remote_desc to NULL to avoid closing remote_desc
5663 serial_close (rs
->remote_desc
);
5664 rs
->remote_desc
= NULL
;
5665 perror_with_name (name
);
5669 serial_setparity (rs
->remote_desc
, serial_parity
);
5670 serial_raw (rs
->remote_desc
);
5672 /* If there is something sitting in the buffer we might take it as a
5673 response to a command, which would be bad. */
5674 serial_flush_input (rs
->remote_desc
);
5678 puts_filtered ("Remote debugging using ");
5679 puts_filtered (name
);
5680 puts_filtered ("\n");
5683 /* Switch to using the remote target now. */
5684 current_inferior ()->push_target (std::move (target_holder
));
5686 /* Register extra event sources in the event loop. */
5687 rs
->remote_async_inferior_event_token
5688 = create_async_event_handler (remote_async_inferior_event_handler
, nullptr,
5690 rs
->notif_state
= remote_notif_state_allocate (remote
);
5692 /* Reset the target state; these things will be queried either by
5693 remote_query_supported or as they are needed. */
5694 reset_all_packet_configs_support ();
5695 rs
->cached_wait_status
= 0;
5696 rs
->explicit_packet_size
= 0;
5698 rs
->extended
= extended_p
;
5699 rs
->waiting_for_stop_reply
= 0;
5700 rs
->ctrlc_pending_p
= 0;
5701 rs
->got_ctrlc_during_io
= 0;
5703 rs
->general_thread
= not_sent_ptid
;
5704 rs
->continue_thread
= not_sent_ptid
;
5705 rs
->remote_traceframe_number
= -1;
5707 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5709 /* Probe for ability to use "ThreadInfo" query, as required. */
5710 rs
->use_threadinfo_query
= 1;
5711 rs
->use_threadextra_query
= 1;
5713 rs
->readahead_cache
.invalidate ();
5715 if (target_async_permitted
)
5717 /* FIXME: cagney/1999-09-23: During the initial connection it is
5718 assumed that the target is already ready and able to respond to
5719 requests. Unfortunately remote_start_remote() eventually calls
5720 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5721 around this. Eventually a mechanism that allows
5722 wait_for_inferior() to expect/get timeouts will be
5724 rs
->wait_forever_enabled_p
= 0;
5727 /* First delete any symbols previously loaded from shared libraries. */
5728 no_shared_libraries (NULL
, 0);
5730 /* Start the remote connection. If error() or QUIT, discard this
5731 target (we'd otherwise be in an inconsistent state) and then
5732 propogate the error on up the exception chain. This ensures that
5733 the caller doesn't stumble along blindly assuming that the
5734 function succeeded. The CLI doesn't have this problem but other
5735 UI's, such as MI do.
5737 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5738 this function should return an error indication letting the
5739 caller restore the previous state. Unfortunately the command
5740 ``target remote'' is directly wired to this function making that
5741 impossible. On a positive note, the CLI side of this problem has
5742 been fixed - the function set_cmd_context() makes it possible for
5743 all the ``target ....'' commands to share a common callback
5744 function. See cli-dump.c. */
5749 remote
->start_remote (from_tty
, extended_p
);
5751 catch (const gdb_exception
&ex
)
5753 /* Pop the partially set up target - unless something else did
5754 already before throwing the exception. */
5755 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5756 remote_unpush_target (remote
);
5761 remote_btrace_reset (rs
);
5763 if (target_async_permitted
)
5764 rs
->wait_forever_enabled_p
= 1;
5767 /* Detach the specified process. */
5770 remote_target::remote_detach_pid (int pid
)
5772 struct remote_state
*rs
= get_remote_state ();
5774 /* This should not be necessary, but the handling for D;PID in
5775 GDBserver versions prior to 8.2 incorrectly assumes that the
5776 selected process points to the same process we're detaching,
5777 leading to misbehavior (and possibly GDBserver crashing) when it
5778 does not. Since it's easy and cheap, work around it by forcing
5779 GDBserver to select GDB's current process. */
5780 set_general_process ();
5782 if (remote_multi_process_p (rs
))
5783 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5785 strcpy (rs
->buf
.data (), "D");
5788 getpkt (&rs
->buf
, 0);
5790 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5792 else if (rs
->buf
[0] == '\0')
5793 error (_("Remote doesn't know how to detach"));
5795 error (_("Can't detach process."));
5798 /* This detaches a program to which we previously attached, using
5799 inferior_ptid to identify the process. After this is done, GDB
5800 can be used to debug some other program. We better not have left
5801 any breakpoints in the target program or it'll die when it hits
5805 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5807 int pid
= inferior_ptid
.pid ();
5808 struct remote_state
*rs
= get_remote_state ();
5811 if (!target_has_execution ())
5812 error (_("No process to detach from."));
5814 target_announce_detach (from_tty
);
5816 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
5818 /* If we're in breakpoints-always-inserted mode, or the inferior
5819 is running, we have to remove breakpoints before detaching.
5820 We don't do this in common code instead because not all
5821 targets support removing breakpoints while the target is
5822 running. The remote target / gdbserver does, though. */
5823 remove_breakpoints_inf (current_inferior ());
5826 /* Tell the remote target to detach. */
5827 remote_detach_pid (pid
);
5829 /* Exit only if this is the only active inferior. */
5830 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors (this) == 1)
5831 puts_filtered (_("Ending remote debugging.\n"));
5833 thread_info
*tp
= find_thread_ptid (this, inferior_ptid
);
5835 /* Check to see if we are detaching a fork parent. Note that if we
5836 are detaching a fork child, tp == NULL. */
5837 is_fork_parent
= (tp
!= NULL
5838 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5840 /* If doing detach-on-fork, we don't mourn, because that will delete
5841 breakpoints that should be available for the followed inferior. */
5842 if (!is_fork_parent
)
5844 /* Save the pid as a string before mourning, since that will
5845 unpush the remote target, and we need the string after. */
5846 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5848 target_mourn_inferior (inferior_ptid
);
5849 if (print_inferior_events
)
5850 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5851 inf
->num
, infpid
.c_str ());
5855 switch_to_no_thread ();
5856 detach_inferior (current_inferior ());
5861 remote_target::detach (inferior
*inf
, int from_tty
)
5863 remote_detach_1 (inf
, from_tty
);
5867 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5869 remote_detach_1 (inf
, from_tty
);
5872 /* Target follow-fork function for remote targets. On entry, and
5873 at return, the current inferior is the fork parent.
5875 Note that although this is currently only used for extended-remote,
5876 it is named remote_follow_fork in anticipation of using it for the
5877 remote target as well. */
5880 remote_target::follow_fork (bool follow_child
, bool detach_fork
)
5882 struct remote_state
*rs
= get_remote_state ();
5883 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5885 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5886 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5888 /* When following the parent and detaching the child, we detach
5889 the child here. For the case of following the child and
5890 detaching the parent, the detach is done in the target-
5891 independent follow fork code in infrun.c. We can't use
5892 target_detach when detaching an unfollowed child because
5893 the client side doesn't know anything about the child. */
5894 if (detach_fork
&& !follow_child
)
5896 /* Detach the fork child. */
5900 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5901 child_pid
= child_ptid
.pid ();
5903 remote_detach_pid (child_pid
);
5910 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5911 in the program space of the new inferior. On entry and at return the
5912 current inferior is the exec'ing inferior. INF is the new exec'd
5913 inferior, which may be the same as the exec'ing inferior unless
5914 follow-exec-mode is "new". */
5917 remote_target::follow_exec (struct inferior
*inf
, const char *execd_pathname
)
5919 /* We know that this is a target file name, so if it has the "target:"
5920 prefix we strip it off before saving it in the program space. */
5921 if (is_target_filename (execd_pathname
))
5922 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5924 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5927 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5930 remote_target::disconnect (const char *args
, int from_tty
)
5933 error (_("Argument given to \"disconnect\" when remotely debugging."));
5935 /* Make sure we unpush even the extended remote targets. Calling
5936 target_mourn_inferior won't unpush, and
5937 remote_target::mourn_inferior won't unpush if there is more than
5938 one inferior left. */
5939 remote_unpush_target (this);
5942 puts_filtered ("Ending remote debugging.\n");
5945 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5946 be chatty about it. */
5949 extended_remote_target::attach (const char *args
, int from_tty
)
5951 struct remote_state
*rs
= get_remote_state ();
5953 char *wait_status
= NULL
;
5955 pid
= parse_pid_to_attach (args
);
5957 /* Remote PID can be freely equal to getpid, do not check it here the same
5958 way as in other targets. */
5960 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5961 error (_("This target does not support attaching to a process"));
5965 const char *exec_file
= get_exec_file (0);
5968 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5969 target_pid_to_str (ptid_t (pid
)).c_str ());
5971 printf_unfiltered (_("Attaching to %s\n"),
5972 target_pid_to_str (ptid_t (pid
)).c_str ());
5975 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
5977 getpkt (&rs
->buf
, 0);
5979 switch (packet_ok (rs
->buf
,
5980 &remote_protocol_packets
[PACKET_vAttach
]))
5983 if (!target_is_non_stop_p ())
5985 /* Save the reply for later. */
5986 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
5987 strcpy (wait_status
, rs
->buf
.data ());
5989 else if (strcmp (rs
->buf
.data (), "OK") != 0)
5990 error (_("Attaching to %s failed with: %s"),
5991 target_pid_to_str (ptid_t (pid
)).c_str (),
5994 case PACKET_UNKNOWN
:
5995 error (_("This target does not support attaching to a process"));
5997 error (_("Attaching to %s failed"),
5998 target_pid_to_str (ptid_t (pid
)).c_str ());
6001 switch_to_inferior_no_thread (remote_add_inferior (false, pid
, 1, 0));
6003 inferior_ptid
= ptid_t (pid
);
6005 if (target_is_non_stop_p ())
6007 /* Get list of threads. */
6008 update_thread_list ();
6010 thread_info
*thread
= first_thread_of_inferior (current_inferior ());
6011 if (thread
!= nullptr)
6012 switch_to_thread (thread
);
6014 /* Invalidate our notion of the remote current thread. */
6015 record_currthread (rs
, minus_one_ptid
);
6019 /* Now, if we have thread information, update the main thread's
6021 ptid_t curr_ptid
= remote_current_thread (ptid_t (pid
));
6023 /* Add the main thread to the thread list. */
6024 thread_info
*thr
= add_thread_silent (this, curr_ptid
);
6026 switch_to_thread (thr
);
6028 /* Don't consider the thread stopped until we've processed the
6029 saved stop reply. */
6030 set_executing (this, thr
->ptid
, true);
6033 /* Next, if the target can specify a description, read it. We do
6034 this before anything involving memory or registers. */
6035 target_find_description ();
6037 if (!target_is_non_stop_p ())
6039 /* Use the previously fetched status. */
6040 gdb_assert (wait_status
!= NULL
);
6042 if (target_can_async_p ())
6044 struct notif_event
*reply
6045 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
6047 push_stop_reply ((struct stop_reply
*) reply
);
6053 gdb_assert (wait_status
!= NULL
);
6054 strcpy (rs
->buf
.data (), wait_status
);
6055 rs
->cached_wait_status
= 1;
6060 gdb_assert (wait_status
== NULL
);
6062 gdb_assert (target_can_async_p ());
6067 /* Implementation of the to_post_attach method. */
6070 extended_remote_target::post_attach (int pid
)
6072 /* Get text, data & bss offsets. */
6075 /* In certain cases GDB might not have had the chance to start
6076 symbol lookup up until now. This could happen if the debugged
6077 binary is not using shared libraries, the vsyscall page is not
6078 present (on Linux) and the binary itself hadn't changed since the
6079 debugging process was started. */
6080 if (current_program_space
->symfile_object_file
!= NULL
)
6081 remote_check_symbols();
6085 /* Check for the availability of vCont. This function should also check
6089 remote_target::remote_vcont_probe ()
6091 remote_state
*rs
= get_remote_state ();
6094 strcpy (rs
->buf
.data (), "vCont?");
6096 getpkt (&rs
->buf
, 0);
6097 buf
= rs
->buf
.data ();
6099 /* Make sure that the features we assume are supported. */
6100 if (startswith (buf
, "vCont"))
6103 int support_c
, support_C
;
6105 rs
->supports_vCont
.s
= 0;
6106 rs
->supports_vCont
.S
= 0;
6109 rs
->supports_vCont
.t
= 0;
6110 rs
->supports_vCont
.r
= 0;
6111 while (p
&& *p
== ';')
6114 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6115 rs
->supports_vCont
.s
= 1;
6116 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6117 rs
->supports_vCont
.S
= 1;
6118 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6120 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6122 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6123 rs
->supports_vCont
.t
= 1;
6124 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6125 rs
->supports_vCont
.r
= 1;
6127 p
= strchr (p
, ';');
6130 /* If c, and C are not all supported, we can't use vCont. Clearing
6131 BUF will make packet_ok disable the packet. */
6132 if (!support_c
|| !support_C
)
6136 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
6137 rs
->supports_vCont_probed
= true;
6140 /* Helper function for building "vCont" resumptions. Write a
6141 resumption to P. ENDP points to one-passed-the-end of the buffer
6142 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6143 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6144 resumed thread should be single-stepped and/or signalled. If PTID
6145 equals minus_one_ptid, then all threads are resumed; if PTID
6146 represents a process, then all threads of the process are resumed;
6147 the thread to be stepped and/or signalled is given in the global
6151 remote_target::append_resumption (char *p
, char *endp
,
6152 ptid_t ptid
, int step
, gdb_signal siggnal
)
6154 struct remote_state
*rs
= get_remote_state ();
6156 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6157 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6159 /* GDB is willing to range step. */
6160 && use_range_stepping
6161 /* Target supports range stepping. */
6162 && rs
->supports_vCont
.r
6163 /* We don't currently support range stepping multiple
6164 threads with a wildcard (though the protocol allows it,
6165 so stubs shouldn't make an active effort to forbid
6167 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6169 struct thread_info
*tp
;
6171 if (ptid
== minus_one_ptid
)
6173 /* If we don't know about the target thread's tid, then
6174 we're resuming magic_null_ptid (see caller). */
6175 tp
= find_thread_ptid (this, magic_null_ptid
);
6178 tp
= find_thread_ptid (this, ptid
);
6179 gdb_assert (tp
!= NULL
);
6181 if (tp
->control
.may_range_step
)
6183 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6185 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6186 phex_nz (tp
->control
.step_range_start
,
6188 phex_nz (tp
->control
.step_range_end
,
6192 p
+= xsnprintf (p
, endp
- p
, ";s");
6195 p
+= xsnprintf (p
, endp
- p
, ";s");
6196 else if (siggnal
!= GDB_SIGNAL_0
)
6197 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6199 p
+= xsnprintf (p
, endp
- p
, ";c");
6201 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6205 /* All (-1) threads of process. */
6206 nptid
= ptid_t (ptid
.pid (), -1, 0);
6208 p
+= xsnprintf (p
, endp
- p
, ":");
6209 p
= write_ptid (p
, endp
, nptid
);
6211 else if (ptid
!= minus_one_ptid
)
6213 p
+= xsnprintf (p
, endp
- p
, ":");
6214 p
= write_ptid (p
, endp
, ptid
);
6220 /* Clear the thread's private info on resume. */
6223 resume_clear_thread_private_info (struct thread_info
*thread
)
6225 if (thread
->priv
!= NULL
)
6227 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6229 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6230 priv
->watch_data_address
= 0;
6234 /* Append a vCont continue-with-signal action for threads that have a
6235 non-zero stop signal. */
6238 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6241 for (thread_info
*thread
: all_non_exited_threads (this, ptid
))
6242 if (inferior_ptid
!= thread
->ptid
6243 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
6245 p
= append_resumption (p
, endp
, thread
->ptid
,
6246 0, thread
->suspend
.stop_signal
);
6247 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
6248 resume_clear_thread_private_info (thread
);
6254 /* Set the target running, using the packets that use Hc
6258 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6261 struct remote_state
*rs
= get_remote_state ();
6264 rs
->last_sent_signal
= siggnal
;
6265 rs
->last_sent_step
= step
;
6267 /* The c/s/C/S resume packets use Hc, so set the continue
6269 if (ptid
== minus_one_ptid
)
6270 set_continue_thread (any_thread_ptid
);
6272 set_continue_thread (ptid
);
6274 for (thread_info
*thread
: all_non_exited_threads (this))
6275 resume_clear_thread_private_info (thread
);
6277 buf
= rs
->buf
.data ();
6278 if (::execution_direction
== EXEC_REVERSE
)
6280 /* We don't pass signals to the target in reverse exec mode. */
6281 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6282 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6285 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6286 error (_("Remote reverse-step not supported."));
6287 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6288 error (_("Remote reverse-continue not supported."));
6290 strcpy (buf
, step
? "bs" : "bc");
6292 else if (siggnal
!= GDB_SIGNAL_0
)
6294 buf
[0] = step
? 'S' : 'C';
6295 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6296 buf
[2] = tohex (((int) siggnal
) & 0xf);
6300 strcpy (buf
, step
? "s" : "c");
6305 /* Resume the remote inferior by using a "vCont" packet. The thread
6306 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6307 resumed thread should be single-stepped and/or signalled. If PTID
6308 equals minus_one_ptid, then all threads are resumed; the thread to
6309 be stepped and/or signalled is given in the global INFERIOR_PTID.
6310 This function returns non-zero iff it resumes the inferior.
6312 This function issues a strict subset of all possible vCont commands
6316 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6317 enum gdb_signal siggnal
)
6319 struct remote_state
*rs
= get_remote_state ();
6323 /* No reverse execution actions defined for vCont. */
6324 if (::execution_direction
== EXEC_REVERSE
)
6327 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6328 remote_vcont_probe ();
6330 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6333 p
= rs
->buf
.data ();
6334 endp
= p
+ get_remote_packet_size ();
6336 /* If we could generate a wider range of packets, we'd have to worry
6337 about overflowing BUF. Should there be a generic
6338 "multi-part-packet" packet? */
6340 p
+= xsnprintf (p
, endp
- p
, "vCont");
6342 if (ptid
== magic_null_ptid
)
6344 /* MAGIC_NULL_PTID means that we don't have any active threads,
6345 so we don't have any TID numbers the inferior will
6346 understand. Make sure to only send forms that do not specify
6348 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6350 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6352 /* Resume all threads (of all processes, or of a single
6353 process), with preference for INFERIOR_PTID. This assumes
6354 inferior_ptid belongs to the set of all threads we are about
6356 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6358 /* Step inferior_ptid, with or without signal. */
6359 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6362 /* Also pass down any pending signaled resumption for other
6363 threads not the current. */
6364 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6366 /* And continue others without a signal. */
6367 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6371 /* Scheduler locking; resume only PTID. */
6372 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6375 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6378 if (target_is_non_stop_p ())
6380 /* In non-stop, the stub replies to vCont with "OK". The stop
6381 reply will be reported asynchronously by means of a `%Stop'
6383 getpkt (&rs
->buf
, 0);
6384 if (strcmp (rs
->buf
.data (), "OK") != 0)
6385 error (_("Unexpected vCont reply in non-stop mode: %s"),
6392 /* Tell the remote machine to resume. */
6395 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6397 struct remote_state
*rs
= get_remote_state ();
6399 /* When connected in non-stop mode, the core resumes threads
6400 individually. Resuming remote threads directly in target_resume
6401 would thus result in sending one packet per thread. Instead, to
6402 minimize roundtrip latency, here we just store the resume
6403 request (put the thread in RESUMED_PENDING_VCONT state); the actual remote
6404 resumption will be done in remote_target::commit_resume, where we'll be
6405 able to do vCont action coalescing. */
6406 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6408 remote_thread_info
*remote_thr
;
6410 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6411 remote_thr
= get_remote_thread_info (this, inferior_ptid
);
6413 remote_thr
= get_remote_thread_info (this, ptid
);
6415 /* We don't expect the core to ask to resume an already resumed (from
6416 its point of view) thread. */
6417 gdb_assert (remote_thr
->get_resume_state () == resume_state::NOT_RESUMED
);
6419 remote_thr
->set_resumed_pending_vcont (step
, siggnal
);
6423 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6424 (explained in remote-notif.c:handle_notification) so
6425 remote_notif_process is not called. We need find a place where
6426 it is safe to start a 'vNotif' sequence. It is good to do it
6427 before resuming inferior, because inferior was stopped and no RSP
6428 traffic at that moment. */
6429 if (!target_is_non_stop_p ())
6430 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6432 rs
->last_resume_exec_dir
= ::execution_direction
;
6434 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6435 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6436 remote_resume_with_hc (ptid
, step
, siggnal
);
6438 /* Update resumed state tracked by the remote target. */
6439 for (thread_info
*tp
: all_non_exited_threads (this, ptid
))
6440 get_remote_thread_info (tp
)->set_resumed ();
6442 /* We are about to start executing the inferior, let's register it
6443 with the event loop. NOTE: this is the one place where all the
6444 execution commands end up. We could alternatively do this in each
6445 of the execution commands in infcmd.c. */
6446 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6447 into infcmd.c in order to allow inferior function calls to work
6448 NOT asynchronously. */
6449 if (target_can_async_p ())
6452 /* We've just told the target to resume. The remote server will
6453 wait for the inferior to stop, and then send a stop reply. In
6454 the mean time, we can't start another command/query ourselves
6455 because the stub wouldn't be ready to process it. This applies
6456 only to the base all-stop protocol, however. In non-stop (which
6457 only supports vCont), the stub replies with an "OK", and is
6458 immediate able to process further serial input. */
6459 if (!target_is_non_stop_p ())
6460 rs
->waiting_for_stop_reply
= 1;
6463 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6465 /* Private per-inferior info for target remote processes. */
6467 struct remote_inferior
: public private_inferior
6469 /* Whether we can send a wildcard vCont for this process. */
6470 bool may_wildcard_vcont
= true;
6473 /* Get the remote private inferior data associated to INF. */
6475 static remote_inferior
*
6476 get_remote_inferior (inferior
*inf
)
6478 if (inf
->priv
== NULL
)
6479 inf
->priv
.reset (new remote_inferior
);
6481 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6484 /* Class used to track the construction of a vCont packet in the
6485 outgoing packet buffer. This is used to send multiple vCont
6486 packets if we have more actions than would fit a single packet. */
6491 explicit vcont_builder (remote_target
*remote
)
6498 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6503 /* The remote target. */
6504 remote_target
*m_remote
;
6506 /* Pointer to the first action. P points here if no action has been
6508 char *m_first_action
;
6510 /* Where the next action will be appended. */
6513 /* The end of the buffer. Must never write past this. */
6517 /* Prepare the outgoing buffer for a new vCont packet. */
6520 vcont_builder::restart ()
6522 struct remote_state
*rs
= m_remote
->get_remote_state ();
6524 m_p
= rs
->buf
.data ();
6525 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6526 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6527 m_first_action
= m_p
;
6530 /* If the vCont packet being built has any action, send it to the
6534 vcont_builder::flush ()
6536 struct remote_state
*rs
;
6538 if (m_p
== m_first_action
)
6541 rs
= m_remote
->get_remote_state ();
6542 m_remote
->putpkt (rs
->buf
);
6543 m_remote
->getpkt (&rs
->buf
, 0);
6544 if (strcmp (rs
->buf
.data (), "OK") != 0)
6545 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6548 /* The largest action is range-stepping, with its two addresses. This
6549 is more than sufficient. If a new, bigger action is created, it'll
6550 quickly trigger a failed assertion in append_resumption (and we'll
6552 #define MAX_ACTION_SIZE 200
6554 /* Append a new vCont action in the outgoing packet being built. If
6555 the action doesn't fit the packet along with previous actions, push
6556 what we've got so far to the remote end and start over a new vCont
6557 packet (with the new action). */
6560 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6562 char buf
[MAX_ACTION_SIZE
+ 1];
6564 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6565 ptid
, step
, siggnal
);
6567 /* Check whether this new action would fit in the vCont packet along
6568 with previous actions. If not, send what we've got so far and
6569 start a new vCont packet. */
6570 size_t rsize
= endp
- buf
;
6571 if (rsize
> m_endp
- m_p
)
6576 /* Should now fit. */
6577 gdb_assert (rsize
<= m_endp
- m_p
);
6580 memcpy (m_p
, buf
, rsize
);
6585 /* to_commit_resume implementation. */
6588 remote_target::commit_resume ()
6590 int any_process_wildcard
;
6591 int may_global_wildcard_vcont
;
6593 /* If connected in all-stop mode, we'd send the remote resume
6594 request directly from remote_resume. Likewise if
6595 reverse-debugging, as there are no defined vCont actions for
6596 reverse execution. */
6597 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6600 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6601 instead of resuming all threads of each process individually.
6602 However, if any thread of a process must remain halted, we can't
6603 send wildcard resumes and must send one action per thread.
6605 Care must be taken to not resume threads/processes the server
6606 side already told us are stopped, but the core doesn't know about
6607 yet, because the events are still in the vStopped notification
6610 #1 => vCont s:p1.1;c
6612 #3 <= %Stopped T05 p1.1
6617 #8 (infrun handles the stop for p1.1 and continues stepping)
6618 #9 => vCont s:p1.1;c
6620 The last vCont above would resume thread p1.2 by mistake, because
6621 the server has no idea that the event for p1.2 had not been
6624 The server side must similarly ignore resume actions for the
6625 thread that has a pending %Stopped notification (and any other
6626 threads with events pending), until GDB acks the notification
6627 with vStopped. Otherwise, e.g., the following case is
6630 #1 => g (or any other packet)
6632 #3 <= %Stopped T05 p1.2
6633 #4 => vCont s:p1.1;c
6636 Above, the server must not resume thread p1.2. GDB can't know
6637 that p1.2 stopped until it acks the %Stopped notification, and
6638 since from GDB's perspective all threads should be running, it
6641 Finally, special care must also be given to handling fork/vfork
6642 events. A (v)fork event actually tells us that two processes
6643 stopped -- the parent and the child. Until we follow the fork,
6644 we must not resume the child. Therefore, if we have a pending
6645 fork follow, we must not send a global wildcard resume action
6646 (vCont;c). We can still send process-wide wildcards though. */
6648 /* Start by assuming a global wildcard (vCont;c) is possible. */
6649 may_global_wildcard_vcont
= 1;
6651 /* And assume every process is individually wildcard-able too. */
6652 for (inferior
*inf
: all_non_exited_inferiors (this))
6654 remote_inferior
*priv
= get_remote_inferior (inf
);
6656 priv
->may_wildcard_vcont
= true;
6659 /* Check for any pending events (not reported or processed yet) and
6660 disable process and global wildcard resumes appropriately. */
6661 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6663 for (thread_info
*tp
: all_non_exited_threads (this))
6665 remote_thread_info
*priv
= get_remote_thread_info (tp
);
6667 /* If a thread of a process is not meant to be resumed, then we
6668 can't wildcard that process. */
6669 if (priv
->get_resume_state () == resume_state::NOT_RESUMED
)
6671 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6673 /* And if we can't wildcard a process, we can't wildcard
6674 everything either. */
6675 may_global_wildcard_vcont
= 0;
6679 /* If a thread is the parent of an unfollowed fork, then we
6680 can't do a global wildcard, as that would resume the fork
6682 if (is_pending_fork_parent_thread (tp
))
6683 may_global_wildcard_vcont
= 0;
6686 /* Now let's build the vCont packet(s). Actions must be appended
6687 from narrower to wider scopes (thread -> process -> global). If
6688 we end up with too many actions for a single packet vcont_builder
6689 flushes the current vCont packet to the remote side and starts a
6691 struct vcont_builder
vcont_builder (this);
6693 /* Threads first. */
6694 for (thread_info
*tp
: all_non_exited_threads (this))
6696 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6698 /* If the thread was previously vCont-resumed, no need to send a specific
6699 action for it. If we didn't receive a resume request for it, don't
6700 send an action for it either. */
6701 if (remote_thr
->get_resume_state () != resume_state::RESUMED_PENDING_VCONT
)
6704 gdb_assert (!thread_is_in_step_over_chain (tp
));
6706 const resumed_pending_vcont_info
&info
6707 = remote_thr
->resumed_pending_vcont_info ();
6709 /* Check if we need to send a specific action for this thread. If not,
6710 it will be included in a wildcard resume instead. */
6711 if (info
.step
|| info
.sig
!= GDB_SIGNAL_0
6712 || !get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6713 vcont_builder
.push_action (tp
->ptid
, info
.step
, info
.sig
);
6715 remote_thr
->set_resumed ();
6718 /* Now check whether we can send any process-wide wildcard. This is
6719 to avoid sending a global wildcard in the case nothing is
6720 supposed to be resumed. */
6721 any_process_wildcard
= 0;
6723 for (inferior
*inf
: all_non_exited_inferiors (this))
6725 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6727 any_process_wildcard
= 1;
6732 if (any_process_wildcard
)
6734 /* If all processes are wildcard-able, then send a single "c"
6735 action, otherwise, send an "all (-1) threads of process"
6736 continue action for each running process, if any. */
6737 if (may_global_wildcard_vcont
)
6739 vcont_builder
.push_action (minus_one_ptid
,
6740 false, GDB_SIGNAL_0
);
6744 for (inferior
*inf
: all_non_exited_inferiors (this))
6746 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6748 vcont_builder
.push_action (ptid_t (inf
->pid
),
6749 false, GDB_SIGNAL_0
);
6755 vcont_builder
.flush ();
6760 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6761 thread, all threads of a remote process, or all threads of all
6765 remote_target::remote_stop_ns (ptid_t ptid
)
6767 struct remote_state
*rs
= get_remote_state ();
6768 char *p
= rs
->buf
.data ();
6769 char *endp
= p
+ get_remote_packet_size ();
6771 /* FIXME: This supports_vCont_probed check is a workaround until
6772 packet_support is per-connection. */
6773 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6774 || !rs
->supports_vCont_probed
)
6775 remote_vcont_probe ();
6777 if (!rs
->supports_vCont
.t
)
6778 error (_("Remote server does not support stopping threads"));
6780 if (ptid
== minus_one_ptid
6781 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6782 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6787 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6790 /* All (-1) threads of process. */
6791 nptid
= ptid_t (ptid
.pid (), -1, 0);
6794 /* Small optimization: if we already have a stop reply for
6795 this thread, no use in telling the stub we want this
6797 if (peek_stop_reply (ptid
))
6803 write_ptid (p
, endp
, nptid
);
6806 /* In non-stop, we get an immediate OK reply. The stop reply will
6807 come in asynchronously by notification. */
6809 getpkt (&rs
->buf
, 0);
6810 if (strcmp (rs
->buf
.data (), "OK") != 0)
6811 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6815 /* All-stop version of target_interrupt. Sends a break or a ^C to
6816 interrupt the remote target. It is undefined which thread of which
6817 process reports the interrupt. */
6820 remote_target::remote_interrupt_as ()
6822 struct remote_state
*rs
= get_remote_state ();
6824 rs
->ctrlc_pending_p
= 1;
6826 /* If the inferior is stopped already, but the core didn't know
6827 about it yet, just ignore the request. The cached wait status
6828 will be collected in remote_wait. */
6829 if (rs
->cached_wait_status
)
6832 /* Send interrupt_sequence to remote target. */
6833 send_interrupt_sequence ();
6836 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6837 the remote target. It is undefined which thread of which process
6838 reports the interrupt. Throws an error if the packet is not
6839 supported by the server. */
6842 remote_target::remote_interrupt_ns ()
6844 struct remote_state
*rs
= get_remote_state ();
6845 char *p
= rs
->buf
.data ();
6846 char *endp
= p
+ get_remote_packet_size ();
6848 xsnprintf (p
, endp
- p
, "vCtrlC");
6850 /* In non-stop, we get an immediate OK reply. The stop reply will
6851 come in asynchronously by notification. */
6853 getpkt (&rs
->buf
, 0);
6855 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6859 case PACKET_UNKNOWN
:
6860 error (_("No support for interrupting the remote target."));
6862 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
6866 /* Implement the to_stop function for the remote targets. */
6869 remote_target::stop (ptid_t ptid
)
6871 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
6873 if (target_is_non_stop_p ())
6874 remote_stop_ns (ptid
);
6877 /* We don't currently have a way to transparently pause the
6878 remote target in all-stop mode. Interrupt it instead. */
6879 remote_interrupt_as ();
6883 /* Implement the to_interrupt function for the remote targets. */
6886 remote_target::interrupt ()
6888 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
6890 if (target_is_non_stop_p ())
6891 remote_interrupt_ns ();
6893 remote_interrupt_as ();
6896 /* Implement the to_pass_ctrlc function for the remote targets. */
6899 remote_target::pass_ctrlc ()
6901 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
6903 struct remote_state
*rs
= get_remote_state ();
6905 /* If we're starting up, we're not fully synced yet. Quit
6907 if (rs
->starting_up
)
6909 /* If ^C has already been sent once, offer to disconnect. */
6910 else if (rs
->ctrlc_pending_p
)
6913 target_interrupt ();
6916 /* Ask the user what to do when an interrupt is received. */
6919 remote_target::interrupt_query ()
6921 struct remote_state
*rs
= get_remote_state ();
6923 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6925 if (query (_("The target is not responding to interrupt requests.\n"
6926 "Stop debugging it? ")))
6928 remote_unpush_target (this);
6929 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6934 if (query (_("Interrupted while waiting for the program.\n"
6935 "Give up waiting? ")))
6940 /* Enable/disable target terminal ownership. Most targets can use
6941 terminal groups to control terminal ownership. Remote targets are
6942 different in that explicit transfer of ownership to/from GDB/target
6946 remote_target::terminal_inferior ()
6948 /* NOTE: At this point we could also register our selves as the
6949 recipient of all input. Any characters typed could then be
6950 passed on down to the target. */
6954 remote_target::terminal_ours ()
6959 remote_console_output (const char *msg
)
6963 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6966 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6970 gdb_stdtarg
->puts (tb
);
6972 gdb_stdtarg
->flush ();
6975 struct stop_reply
: public notif_event
6979 /* The identifier of the thread about this event */
6982 /* The remote state this event is associated with. When the remote
6983 connection, represented by a remote_state object, is closed,
6984 all the associated stop_reply events should be released. */
6985 struct remote_state
*rs
;
6987 struct target_waitstatus ws
;
6989 /* The architecture associated with the expedited registers. */
6992 /* Expedited registers. This makes remote debugging a bit more
6993 efficient for those targets that provide critical registers as
6994 part of their normal status mechanism (as another roundtrip to
6995 fetch them is avoided). */
6996 std::vector
<cached_reg_t
> regcache
;
6998 enum target_stop_reason stop_reason
;
7000 CORE_ADDR watch_data_address
;
7005 /* Return the length of the stop reply queue. */
7008 remote_target::stop_reply_queue_length ()
7010 remote_state
*rs
= get_remote_state ();
7011 return rs
->stop_reply_queue
.size ();
7015 remote_notif_stop_parse (remote_target
*remote
,
7016 struct notif_client
*self
, const char *buf
,
7017 struct notif_event
*event
)
7019 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
7023 remote_notif_stop_ack (remote_target
*remote
,
7024 struct notif_client
*self
, const char *buf
,
7025 struct notif_event
*event
)
7027 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
7030 putpkt (remote
, self
->ack_command
);
7032 /* Kind can be TARGET_WAITKIND_IGNORE if we have meanwhile discarded
7033 the notification. It was left in the queue because we need to
7034 acknowledge it and pull the rest of the notifications out. */
7035 if (stop_reply
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7036 remote
->push_stop_reply (stop_reply
);
7040 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
7041 struct notif_client
*self
)
7043 /* We can't get pending events in remote_notif_process for
7044 notification stop, and we have to do this in remote_wait_ns
7045 instead. If we fetch all queued events from stub, remote stub
7046 may exit and we have no chance to process them back in
7048 remote_state
*rs
= remote
->get_remote_state ();
7049 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7053 stop_reply::~stop_reply ()
7055 for (cached_reg_t
®
: regcache
)
7059 static notif_event_up
7060 remote_notif_stop_alloc_reply ()
7062 return notif_event_up (new struct stop_reply ());
7065 /* A client of notification Stop. */
7067 struct notif_client notif_client_stop
=
7071 remote_notif_stop_parse
,
7072 remote_notif_stop_ack
,
7073 remote_notif_stop_can_get_pending_events
,
7074 remote_notif_stop_alloc_reply
,
7078 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
7079 the pid of the process that owns the threads we want to check, or
7080 -1 if we want to check all threads. */
7083 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
7086 if (ws
->kind
== TARGET_WAITKIND_FORKED
7087 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
7089 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
7096 /* Return the thread's pending status used to determine whether the
7097 thread is a fork parent stopped at a fork event. */
7099 static struct target_waitstatus
*
7100 thread_pending_fork_status (struct thread_info
*thread
)
7102 if (thread
->suspend
.waitstatus_pending_p
)
7103 return &thread
->suspend
.waitstatus
;
7105 return &thread
->pending_follow
;
7108 /* Determine if THREAD is a pending fork parent thread. */
7111 is_pending_fork_parent_thread (struct thread_info
*thread
)
7113 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7116 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7119 /* If CONTEXT contains any fork child threads that have not been
7120 reported yet, remove them from the CONTEXT list. If such a
7121 thread exists it is because we are stopped at a fork catchpoint
7122 and have not yet called follow_fork, which will set up the
7123 host-side data structures for the new process. */
7126 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7129 struct notif_client
*notif
= ¬if_client_stop
;
7131 /* For any threads stopped at a fork event, remove the corresponding
7132 fork child threads from the CONTEXT list. */
7133 for (thread_info
*thread
: all_non_exited_threads (this))
7135 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7137 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7138 context
->remove_thread (ws
->value
.related_pid
);
7141 /* Check for any pending fork events (not reported or processed yet)
7142 in process PID and remove those fork child threads from the
7143 CONTEXT list as well. */
7144 remote_notif_get_pending_events (notif
);
7145 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7146 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7147 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7148 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7149 context
->remove_thread (event
->ws
.value
.related_pid
);
7152 /* Check whether any event pending in the vStopped queue would prevent
7153 a global or process wildcard vCont action. Clear
7154 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7155 and clear the event inferior's may_wildcard_vcont flag if we can't
7156 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7159 remote_target::check_pending_events_prevent_wildcard_vcont
7160 (int *may_global_wildcard
)
7162 struct notif_client
*notif
= ¬if_client_stop
;
7164 remote_notif_get_pending_events (notif
);
7165 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7167 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7168 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7171 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7172 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7173 *may_global_wildcard
= 0;
7175 struct inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7177 /* This may be the first time we heard about this process.
7178 Regardless, we must not do a global wildcard resume, otherwise
7179 we'd resume this process too. */
7180 *may_global_wildcard
= 0;
7182 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7186 /* Discard all pending stop replies of inferior INF. */
7189 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7191 struct stop_reply
*reply
;
7192 struct remote_state
*rs
= get_remote_state ();
7193 struct remote_notif_state
*rns
= rs
->notif_state
;
7195 /* This function can be notified when an inferior exists. When the
7196 target is not remote, the notification state is NULL. */
7197 if (rs
->remote_desc
== NULL
)
7200 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7202 /* Discard the in-flight notification. */
7203 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7205 /* Leave the notification pending, since the server expects that
7206 we acknowledge it with vStopped. But clear its contents, so
7207 that later on when we acknowledge it, we also discard it. */
7208 reply
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7211 fprintf_unfiltered (gdb_stdlog
,
7212 "discarded in-flight notification\n");
7215 /* Discard the stop replies we have already pulled with
7217 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7218 rs
->stop_reply_queue
.end (),
7219 [=] (const stop_reply_up
&event
)
7221 return event
->ptid
.pid () == inf
->pid
;
7223 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7226 /* Discard the stop replies for RS in stop_reply_queue. */
7229 remote_target::discard_pending_stop_replies_in_queue ()
7231 remote_state
*rs
= get_remote_state ();
7233 /* Discard the stop replies we have already pulled with
7235 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7236 rs
->stop_reply_queue
.end (),
7237 [=] (const stop_reply_up
&event
)
7239 return event
->rs
== rs
;
7241 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7244 /* Remove the first reply in 'stop_reply_queue' which matches
7248 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7250 remote_state
*rs
= get_remote_state ();
7252 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7253 rs
->stop_reply_queue
.end (),
7254 [=] (const stop_reply_up
&event
)
7256 return event
->ptid
.matches (ptid
);
7258 struct stop_reply
*result
;
7259 if (iter
== rs
->stop_reply_queue
.end ())
7263 result
= iter
->release ();
7264 rs
->stop_reply_queue
.erase (iter
);
7268 fprintf_unfiltered (gdb_stdlog
,
7269 "notif: discard queued event: 'Stop' in %s\n",
7270 target_pid_to_str (ptid
).c_str ());
7275 /* Look for a queued stop reply belonging to PTID. If one is found,
7276 remove it from the queue, and return it. Returns NULL if none is
7277 found. If there are still queued events left to process, tell the
7278 event loop to get back to target_wait soon. */
7281 remote_target::queued_stop_reply (ptid_t ptid
)
7283 remote_state
*rs
= get_remote_state ();
7284 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7286 if (!rs
->stop_reply_queue
.empty ())
7288 /* There's still at least an event left. */
7289 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7295 /* Push a fully parsed stop reply in the stop reply queue. Since we
7296 know that we now have at least one queued event left to pass to the
7297 core side, tell the event loop to get back to target_wait soon. */
7300 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7302 remote_state
*rs
= get_remote_state ();
7303 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7306 fprintf_unfiltered (gdb_stdlog
,
7307 "notif: push 'Stop' %s to queue %d\n",
7308 target_pid_to_str (new_event
->ptid
).c_str (),
7309 int (rs
->stop_reply_queue
.size ()));
7311 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7314 /* Returns true if we have a stop reply for PTID. */
7317 remote_target::peek_stop_reply (ptid_t ptid
)
7319 remote_state
*rs
= get_remote_state ();
7320 for (auto &event
: rs
->stop_reply_queue
)
7321 if (ptid
== event
->ptid
7322 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7327 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7328 starting with P and ending with PEND matches PREFIX. */
7331 strprefix (const char *p
, const char *pend
, const char *prefix
)
7333 for ( ; p
< pend
; p
++, prefix
++)
7336 return *prefix
== '\0';
7339 /* Parse the stop reply in BUF. Either the function succeeds, and the
7340 result is stored in EVENT, or throws an error. */
7343 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7345 remote_arch_state
*rsa
= NULL
;
7350 event
->ptid
= null_ptid
;
7351 event
->rs
= get_remote_state ();
7352 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7353 event
->ws
.value
.integer
= 0;
7354 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7355 event
->regcache
.clear ();
7360 case 'T': /* Status with PC, SP, FP, ... */
7361 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7362 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7364 n... = register number
7365 r... = register contents
7368 p
= &buf
[3]; /* after Txx */
7374 p1
= strchr (p
, ':');
7376 error (_("Malformed packet(a) (missing colon): %s\n\
7380 error (_("Malformed packet(a) (missing register number): %s\n\
7384 /* Some "registers" are actually extended stop information.
7385 Note if you're adding a new entry here: GDB 7.9 and
7386 earlier assume that all register "numbers" that start
7387 with an hex digit are real register numbers. Make sure
7388 the server only sends such a packet if it knows the
7389 client understands it. */
7391 if (strprefix (p
, p1
, "thread"))
7392 event
->ptid
= read_ptid (++p1
, &p
);
7393 else if (strprefix (p
, p1
, "syscall_entry"))
7397 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7398 p
= unpack_varlen_hex (++p1
, &sysno
);
7399 event
->ws
.value
.syscall_number
= (int) sysno
;
7401 else if (strprefix (p
, p1
, "syscall_return"))
7405 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7406 p
= unpack_varlen_hex (++p1
, &sysno
);
7407 event
->ws
.value
.syscall_number
= (int) sysno
;
7409 else if (strprefix (p
, p1
, "watch")
7410 || strprefix (p
, p1
, "rwatch")
7411 || strprefix (p
, p1
, "awatch"))
7413 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7414 p
= unpack_varlen_hex (++p1
, &addr
);
7415 event
->watch_data_address
= (CORE_ADDR
) addr
;
7417 else if (strprefix (p
, p1
, "swbreak"))
7419 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7421 /* Make sure the stub doesn't forget to indicate support
7423 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7424 error (_("Unexpected swbreak stop reason"));
7426 /* The value part is documented as "must be empty",
7427 though we ignore it, in case we ever decide to make
7428 use of it in a backward compatible way. */
7429 p
= strchrnul (p1
+ 1, ';');
7431 else if (strprefix (p
, p1
, "hwbreak"))
7433 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7435 /* Make sure the stub doesn't forget to indicate support
7437 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7438 error (_("Unexpected hwbreak stop reason"));
7441 p
= strchrnul (p1
+ 1, ';');
7443 else if (strprefix (p
, p1
, "library"))
7445 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7446 p
= strchrnul (p1
+ 1, ';');
7448 else if (strprefix (p
, p1
, "replaylog"))
7450 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7451 /* p1 will indicate "begin" or "end", but it makes
7452 no difference for now, so ignore it. */
7453 p
= strchrnul (p1
+ 1, ';');
7455 else if (strprefix (p
, p1
, "core"))
7459 p
= unpack_varlen_hex (++p1
, &c
);
7462 else if (strprefix (p
, p1
, "fork"))
7464 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7465 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7467 else if (strprefix (p
, p1
, "vfork"))
7469 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7470 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7472 else if (strprefix (p
, p1
, "vforkdone"))
7474 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7475 p
= strchrnul (p1
+ 1, ';');
7477 else if (strprefix (p
, p1
, "exec"))
7482 /* Determine the length of the execd pathname. */
7483 p
= unpack_varlen_hex (++p1
, &ignored
);
7484 pathlen
= (p
- p1
) / 2;
7486 /* Save the pathname for event reporting and for
7487 the next run command. */
7488 gdb::unique_xmalloc_ptr
<char[]> pathname
7489 ((char *) xmalloc (pathlen
+ 1));
7490 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7491 pathname
[pathlen
] = '\0';
7493 /* This is freed during event handling. */
7494 event
->ws
.value
.execd_pathname
= pathname
.release ();
7495 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7497 /* Skip the registers included in this packet, since
7498 they may be for an architecture different from the
7499 one used by the original program. */
7502 else if (strprefix (p
, p1
, "create"))
7504 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7505 p
= strchrnul (p1
+ 1, ';');
7514 p
= strchrnul (p1
+ 1, ';');
7519 /* Maybe a real ``P'' register number. */
7520 p_temp
= unpack_varlen_hex (p
, &pnum
);
7521 /* If the first invalid character is the colon, we got a
7522 register number. Otherwise, it's an unknown stop
7526 /* If we haven't parsed the event's thread yet, find
7527 it now, in order to find the architecture of the
7528 reported expedited registers. */
7529 if (event
->ptid
== null_ptid
)
7531 /* If there is no thread-id information then leave
7532 the event->ptid as null_ptid. Later in
7533 process_stop_reply we will pick a suitable
7535 const char *thr
= strstr (p1
+ 1, ";thread:");
7537 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7544 = (event
->ptid
== null_ptid
7546 : find_inferior_ptid (this, event
->ptid
));
7547 /* If this is the first time we learn anything
7548 about this process, skip the registers
7549 included in this packet, since we don't yet
7550 know which architecture to use to parse them.
7551 We'll determine the architecture later when
7552 we process the stop reply and retrieve the
7553 target description, via
7554 remote_notice_new_inferior ->
7555 post_create_inferior. */
7558 p
= strchrnul (p1
+ 1, ';');
7563 event
->arch
= inf
->gdbarch
;
7564 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7568 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7569 cached_reg_t cached_reg
;
7572 error (_("Remote sent bad register number %s: %s\n\
7574 hex_string (pnum
), p
, buf
);
7576 cached_reg
.num
= reg
->regnum
;
7577 cached_reg
.data
= (gdb_byte
*)
7578 xmalloc (register_size (event
->arch
, reg
->regnum
));
7581 fieldsize
= hex2bin (p
, cached_reg
.data
,
7582 register_size (event
->arch
, reg
->regnum
));
7584 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7585 warning (_("Remote reply is too short: %s"), buf
);
7587 event
->regcache
.push_back (cached_reg
);
7591 /* Not a number. Silently skip unknown optional
7593 p
= strchrnul (p1
+ 1, ';');
7598 error (_("Remote register badly formatted: %s\nhere: %s"),
7603 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7607 case 'S': /* Old style status, just signal only. */
7611 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7612 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7613 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7614 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7616 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7619 case 'w': /* Thread exited. */
7623 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7624 p
= unpack_varlen_hex (&buf
[1], &value
);
7625 event
->ws
.value
.integer
= value
;
7627 error (_("stop reply packet badly formatted: %s"), buf
);
7628 event
->ptid
= read_ptid (++p
, NULL
);
7631 case 'W': /* Target exited. */
7636 /* GDB used to accept only 2 hex chars here. Stubs should
7637 only send more if they detect GDB supports multi-process
7639 p
= unpack_varlen_hex (&buf
[1], &value
);
7643 /* The remote process exited. */
7644 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7645 event
->ws
.value
.integer
= value
;
7649 /* The remote process exited with a signal. */
7650 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7651 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7652 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7654 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7657 /* If no process is specified, return null_ptid, and let the
7658 caller figure out the right process to use. */
7668 else if (startswith (p
, "process:"))
7672 p
+= sizeof ("process:") - 1;
7673 unpack_varlen_hex (p
, &upid
);
7677 error (_("unknown stop reply packet: %s"), buf
);
7680 error (_("unknown stop reply packet: %s"), buf
);
7681 event
->ptid
= ptid_t (pid
);
7685 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7686 event
->ptid
= minus_one_ptid
;
7691 /* When the stub wants to tell GDB about a new notification reply, it
7692 sends a notification (%Stop, for example). Those can come it at
7693 any time, hence, we have to make sure that any pending
7694 putpkt/getpkt sequence we're making is finished, before querying
7695 the stub for more events with the corresponding ack command
7696 (vStopped, for example). E.g., if we started a vStopped sequence
7697 immediately upon receiving the notification, something like this
7705 1.6) <-- (registers reply to step #1.3)
7707 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7710 To solve this, whenever we parse a %Stop notification successfully,
7711 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7712 doing whatever we were doing:
7718 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7719 2.5) <-- (registers reply to step #2.3)
7721 Eventually after step #2.5, we return to the event loop, which
7722 notices there's an event on the
7723 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7724 associated callback --- the function below. At this point, we're
7725 always safe to start a vStopped sequence. :
7728 2.7) <-- T05 thread:2
7734 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7736 struct remote_state
*rs
= get_remote_state ();
7738 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7741 fprintf_unfiltered (gdb_stdlog
,
7742 "notif: process: '%s' ack pending event\n",
7746 nc
->ack (this, nc
, rs
->buf
.data (),
7747 rs
->notif_state
->pending_event
[nc
->id
]);
7748 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7752 getpkt (&rs
->buf
, 0);
7753 if (strcmp (rs
->buf
.data (), "OK") == 0)
7756 remote_notif_ack (this, nc
, rs
->buf
.data ());
7762 fprintf_unfiltered (gdb_stdlog
,
7763 "notif: process: '%s' no pending reply\n",
7768 /* Wrapper around remote_target::remote_notif_get_pending_events to
7769 avoid having to export the whole remote_target class. */
7772 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7774 remote
->remote_notif_get_pending_events (nc
);
7777 /* Called from process_stop_reply when the stop packet we are responding
7778 to didn't include a process-id or thread-id. STATUS is the stop event
7779 we are responding to.
7781 It is the task of this function to select a suitable thread (or process)
7782 and return its ptid, this is the thread (or process) we will assume the
7783 stop event came from.
7785 In some cases there isn't really any choice about which thread (or
7786 process) is selected, a basic remote with a single process containing a
7787 single thread might choose not to send any process-id or thread-id in
7788 its stop packets, this function will select and return the one and only
7791 However, if a target supports multiple threads (or processes) and still
7792 doesn't include a thread-id (or process-id) in its stop packet then
7793 first, this is a badly behaving target, and second, we're going to have
7794 to select a thread (or process) at random and use that. This function
7795 will print a warning to the user if it detects that there is the
7796 possibility that GDB is guessing which thread (or process) to
7799 Note that this is called before GDB fetches the updated thread list from the
7800 target. So it's possible for the stop reply to be ambiguous and for GDB to
7801 not realize it. For example, if there's initially one thread, the target
7802 spawns a second thread, and then sends a stop reply without an id that
7803 concerns the first thread. GDB will assume the stop reply is about the
7804 first thread - the only thread it knows about - without printing a warning.
7805 Anyway, if the remote meant for the stop reply to be about the second thread,
7806 then it would be really broken, because GDB doesn't know about that thread
7810 remote_target::select_thread_for_ambiguous_stop_reply
7811 (const struct target_waitstatus
*status
)
7813 /* Some stop events apply to all threads in an inferior, while others
7814 only apply to a single thread. */
7815 bool process_wide_stop
7816 = (status
->kind
== TARGET_WAITKIND_EXITED
7817 || status
->kind
== TARGET_WAITKIND_SIGNALLED
);
7819 thread_info
*first_resumed_thread
= nullptr;
7820 bool ambiguous
= false;
7822 /* Consider all non-exited threads of the target, find the first resumed
7824 for (thread_info
*thr
: all_non_exited_threads (this))
7826 remote_thread_info
*remote_thr
= get_remote_thread_info (thr
);
7828 if (remote_thr
->get_resume_state () != resume_state::RESUMED
)
7831 if (first_resumed_thread
== nullptr)
7832 first_resumed_thread
= thr
;
7833 else if (!process_wide_stop
7834 || first_resumed_thread
->ptid
.pid () != thr
->ptid
.pid ())
7838 gdb_assert (first_resumed_thread
!= nullptr);
7840 /* Warn if the remote target is sending ambiguous stop replies. */
7843 static bool warned
= false;
7847 /* If you are seeing this warning then the remote target has
7848 stopped without specifying a thread-id, but the target
7849 does have multiple threads (or inferiors), and so GDB is
7850 having to guess which thread stopped.
7852 Examples of what might cause this are the target sending
7853 and 'S' stop packet, or a 'T' stop packet and not
7854 including a thread-id.
7856 Additionally, the target might send a 'W' or 'X packet
7857 without including a process-id, when the target has
7858 multiple running inferiors. */
7859 if (process_wide_stop
)
7860 warning (_("multi-inferior target stopped without "
7861 "sending a process-id, using first "
7862 "non-exited inferior"));
7864 warning (_("multi-threaded target stopped without "
7865 "sending a thread-id, using first "
7866 "non-exited thread"));
7871 /* If this is a stop for all threads then don't use a particular threads
7872 ptid, instead create a new ptid where only the pid field is set. */
7873 if (process_wide_stop
)
7874 return ptid_t (first_resumed_thread
->ptid
.pid ());
7876 return first_resumed_thread
->ptid
;
7879 /* Called when it is decided that STOP_REPLY holds the info of the
7880 event that is to be returned to the core. This function always
7881 destroys STOP_REPLY. */
7884 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
7885 struct target_waitstatus
*status
)
7887 *status
= stop_reply
->ws
;
7888 ptid_t ptid
= stop_reply
->ptid
;
7890 /* If no thread/process was reported by the stub then select a suitable
7892 if (ptid
== null_ptid
)
7893 ptid
= select_thread_for_ambiguous_stop_reply (status
);
7894 gdb_assert (ptid
!= null_ptid
);
7896 if (status
->kind
!= TARGET_WAITKIND_EXITED
7897 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7898 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7900 /* Expedited registers. */
7901 if (!stop_reply
->regcache
.empty ())
7903 struct regcache
*regcache
7904 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
7906 for (cached_reg_t
®
: stop_reply
->regcache
)
7908 regcache
->raw_supply (reg
.num
, reg
.data
);
7912 stop_reply
->regcache
.clear ();
7915 remote_notice_new_inferior (ptid
, 0);
7916 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
7917 remote_thr
->core
= stop_reply
->core
;
7918 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7919 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7921 if (target_is_non_stop_p ())
7923 /* If the target works in non-stop mode, a stop-reply indicates that
7924 only this thread stopped. */
7925 remote_thr
->set_not_resumed ();
7929 /* If the target works in all-stop mode, a stop-reply indicates that
7930 all the target's threads stopped. */
7931 for (thread_info
*tp
: all_non_exited_threads (this))
7932 get_remote_thread_info (tp
)->set_not_resumed ();
7940 /* The non-stop mode version of target_wait. */
7943 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
7944 target_wait_flags options
)
7946 struct remote_state
*rs
= get_remote_state ();
7947 struct stop_reply
*stop_reply
;
7951 /* If in non-stop mode, get out of getpkt even if a
7952 notification is received. */
7954 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
7957 if (ret
!= -1 && !is_notif
)
7960 case 'E': /* Error of some sort. */
7961 /* We're out of sync with the target now. Did it continue
7962 or not? We can't tell which thread it was in non-stop,
7963 so just ignore this. */
7964 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
7966 case 'O': /* Console output. */
7967 remote_console_output (&rs
->buf
[1]);
7970 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
7974 /* Acknowledge a pending stop reply that may have arrived in the
7976 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7977 remote_notif_get_pending_events (¬if_client_stop
);
7979 /* If indeed we noticed a stop reply, we're done. */
7980 stop_reply
= queued_stop_reply (ptid
);
7981 if (stop_reply
!= NULL
)
7982 return process_stop_reply (stop_reply
, status
);
7984 /* Still no event. If we're just polling for an event, then
7985 return to the event loop. */
7986 if (options
& TARGET_WNOHANG
)
7988 status
->kind
= TARGET_WAITKIND_IGNORE
;
7989 return minus_one_ptid
;
7992 /* Otherwise do a blocking wait. */
7993 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
7997 /* Return the first resumed thread. */
8000 first_remote_resumed_thread (remote_target
*target
)
8002 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
8008 /* Wait until the remote machine stops, then return, storing status in
8009 STATUS just as `wait' would. */
8012 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
,
8013 target_wait_flags options
)
8015 struct remote_state
*rs
= get_remote_state ();
8016 ptid_t event_ptid
= null_ptid
;
8018 struct stop_reply
*stop_reply
;
8022 status
->kind
= TARGET_WAITKIND_IGNORE
;
8023 status
->value
.integer
= 0;
8025 stop_reply
= queued_stop_reply (ptid
);
8026 if (stop_reply
!= NULL
)
8027 return process_stop_reply (stop_reply
, status
);
8029 if (rs
->cached_wait_status
)
8030 /* Use the cached wait status, but only once. */
8031 rs
->cached_wait_status
= 0;
8036 int forever
= ((options
& TARGET_WNOHANG
) == 0
8037 && rs
->wait_forever_enabled_p
);
8039 if (!rs
->waiting_for_stop_reply
)
8041 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
8042 return minus_one_ptid
;
8045 /* FIXME: cagney/1999-09-27: If we're in async mode we should
8046 _never_ wait for ever -> test on target_is_async_p().
8047 However, before we do that we need to ensure that the caller
8048 knows how to take the target into/out of async mode. */
8049 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
8051 /* GDB gets a notification. Return to core as this event is
8053 if (ret
!= -1 && is_notif
)
8054 return minus_one_ptid
;
8056 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
8057 return minus_one_ptid
;
8060 buf
= rs
->buf
.data ();
8062 /* Assume that the target has acknowledged Ctrl-C unless we receive
8063 an 'F' or 'O' packet. */
8064 if (buf
[0] != 'F' && buf
[0] != 'O')
8065 rs
->ctrlc_pending_p
= 0;
8069 case 'E': /* Error of some sort. */
8070 /* We're out of sync with the target now. Did it continue or
8071 not? Not is more likely, so report a stop. */
8072 rs
->waiting_for_stop_reply
= 0;
8074 warning (_("Remote failure reply: %s"), buf
);
8075 status
->kind
= TARGET_WAITKIND_STOPPED
;
8076 status
->value
.sig
= GDB_SIGNAL_0
;
8078 case 'F': /* File-I/O request. */
8079 /* GDB may access the inferior memory while handling the File-I/O
8080 request, but we don't want GDB accessing memory while waiting
8081 for a stop reply. See the comments in putpkt_binary. Set
8082 waiting_for_stop_reply to 0 temporarily. */
8083 rs
->waiting_for_stop_reply
= 0;
8084 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
8085 rs
->ctrlc_pending_p
= 0;
8086 /* GDB handled the File-I/O request, and the target is running
8087 again. Keep waiting for events. */
8088 rs
->waiting_for_stop_reply
= 1;
8090 case 'N': case 'T': case 'S': case 'X': case 'W':
8092 /* There is a stop reply to handle. */
8093 rs
->waiting_for_stop_reply
= 0;
8096 = (struct stop_reply
*) remote_notif_parse (this,
8100 event_ptid
= process_stop_reply (stop_reply
, status
);
8103 case 'O': /* Console output. */
8104 remote_console_output (buf
+ 1);
8107 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
8109 /* Zero length reply means that we tried 'S' or 'C' and the
8110 remote system doesn't support it. */
8111 target_terminal::ours_for_output ();
8113 ("Can't send signals to this remote system. %s not sent.\n",
8114 gdb_signal_to_name (rs
->last_sent_signal
));
8115 rs
->last_sent_signal
= GDB_SIGNAL_0
;
8116 target_terminal::inferior ();
8118 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
8124 warning (_("Invalid remote reply: %s"), buf
);
8128 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
8129 return minus_one_ptid
;
8130 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
8132 /* Nothing interesting happened. If we're doing a non-blocking
8133 poll, we're done. Otherwise, go back to waiting. */
8134 if (options
& TARGET_WNOHANG
)
8135 return minus_one_ptid
;
8139 else if (status
->kind
!= TARGET_WAITKIND_EXITED
8140 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
8142 if (event_ptid
!= null_ptid
)
8143 record_currthread (rs
, event_ptid
);
8145 event_ptid
= first_remote_resumed_thread (this);
8149 /* A process exit. Invalidate our notion of current thread. */
8150 record_currthread (rs
, minus_one_ptid
);
8151 /* It's possible that the packet did not include a pid. */
8152 if (event_ptid
== null_ptid
)
8153 event_ptid
= first_remote_resumed_thread (this);
8154 /* EVENT_PTID could still be NULL_PTID. Double-check. */
8155 if (event_ptid
== null_ptid
)
8156 event_ptid
= magic_null_ptid
;
8162 /* Wait until the remote machine stops, then return, storing status in
8163 STATUS just as `wait' would. */
8166 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
,
8167 target_wait_flags options
)
8169 REMOTE_SCOPED_DEBUG_ENTER_EXIT
;
8171 remote_state
*rs
= get_remote_state ();
8173 /* Start by clearing the flag that asks for our wait method to be called,
8174 we'll mark it again at the end if needed. */
8175 if (target_is_async_p ())
8176 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
8180 if (target_is_non_stop_p ())
8181 event_ptid
= wait_ns (ptid
, status
, options
);
8183 event_ptid
= wait_as (ptid
, status
, options
);
8185 if (target_is_async_p ())
8187 /* If there are events left in the queue, or unacknowledged
8188 notifications, then tell the event loop to call us again. */
8189 if (!rs
->stop_reply_queue
.empty ()
8190 || rs
->notif_state
->pending_event
[notif_client_stop
.id
] != nullptr)
8191 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
8197 /* Fetch a single register using a 'p' packet. */
8200 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8203 struct gdbarch
*gdbarch
= regcache
->arch ();
8204 struct remote_state
*rs
= get_remote_state ();
8206 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8209 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8212 if (reg
->pnum
== -1)
8215 p
= rs
->buf
.data ();
8217 p
+= hexnumstr (p
, reg
->pnum
);
8220 getpkt (&rs
->buf
, 0);
8222 buf
= rs
->buf
.data ();
8224 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8228 case PACKET_UNKNOWN
:
8231 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8232 gdbarch_register_name (regcache
->arch (),
8237 /* If this register is unfetchable, tell the regcache. */
8240 regcache
->raw_supply (reg
->regnum
, NULL
);
8244 /* Otherwise, parse and supply the value. */
8250 error (_("fetch_register_using_p: early buf termination"));
8252 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8255 regcache
->raw_supply (reg
->regnum
, regp
);
8259 /* Fetch the registers included in the target's 'g' packet. */
8262 remote_target::send_g_packet ()
8264 struct remote_state
*rs
= get_remote_state ();
8267 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8269 getpkt (&rs
->buf
, 0);
8270 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8271 error (_("Could not read registers; remote failure reply '%s'"),
8274 /* We can get out of synch in various cases. If the first character
8275 in the buffer is not a hex character, assume that has happened
8276 and try to fetch another packet to read. */
8277 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8278 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8279 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8280 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8282 remote_debug_printf ("Bad register packet; fetching a new packet");
8283 getpkt (&rs
->buf
, 0);
8286 buf_len
= strlen (rs
->buf
.data ());
8288 /* Sanity check the received packet. */
8289 if (buf_len
% 2 != 0)
8290 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8296 remote_target::process_g_packet (struct regcache
*regcache
)
8298 struct gdbarch
*gdbarch
= regcache
->arch ();
8299 struct remote_state
*rs
= get_remote_state ();
8300 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8305 buf_len
= strlen (rs
->buf
.data ());
8307 /* Further sanity checks, with knowledge of the architecture. */
8308 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8309 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8311 rsa
->sizeof_g_packet
, buf_len
/ 2,
8314 /* Save the size of the packet sent to us by the target. It is used
8315 as a heuristic when determining the max size of packets that the
8316 target can safely receive. */
8317 if (rsa
->actual_register_packet_size
== 0)
8318 rsa
->actual_register_packet_size
= buf_len
;
8320 /* If this is smaller than we guessed the 'g' packet would be,
8321 update our records. A 'g' reply that doesn't include a register's
8322 value implies either that the register is not available, or that
8323 the 'p' packet must be used. */
8324 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8326 long sizeof_g_packet
= buf_len
/ 2;
8328 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8330 long offset
= rsa
->regs
[i
].offset
;
8331 long reg_size
= register_size (gdbarch
, i
);
8333 if (rsa
->regs
[i
].pnum
== -1)
8336 if (offset
>= sizeof_g_packet
)
8337 rsa
->regs
[i
].in_g_packet
= 0;
8338 else if (offset
+ reg_size
> sizeof_g_packet
)
8339 error (_("Truncated register %d in remote 'g' packet"), i
);
8341 rsa
->regs
[i
].in_g_packet
= 1;
8344 /* Looks valid enough, we can assume this is the correct length
8345 for a 'g' packet. It's important not to adjust
8346 rsa->sizeof_g_packet if we have truncated registers otherwise
8347 this "if" won't be run the next time the method is called
8348 with a packet of the same size and one of the internal errors
8349 below will trigger instead. */
8350 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8353 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8355 /* Unimplemented registers read as all bits zero. */
8356 memset (regs
, 0, rsa
->sizeof_g_packet
);
8358 /* Reply describes registers byte by byte, each byte encoded as two
8359 hex characters. Suck them all up, then supply them to the
8360 register cacheing/storage mechanism. */
8362 p
= rs
->buf
.data ();
8363 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8365 if (p
[0] == 0 || p
[1] == 0)
8366 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8367 internal_error (__FILE__
, __LINE__
,
8368 _("unexpected end of 'g' packet reply"));
8370 if (p
[0] == 'x' && p
[1] == 'x')
8371 regs
[i
] = 0; /* 'x' */
8373 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8377 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8379 struct packet_reg
*r
= &rsa
->regs
[i
];
8380 long reg_size
= register_size (gdbarch
, i
);
8384 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8385 /* This shouldn't happen - we adjusted in_g_packet above. */
8386 internal_error (__FILE__
, __LINE__
,
8387 _("unexpected end of 'g' packet reply"));
8388 else if (rs
->buf
[r
->offset
* 2] == 'x')
8390 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8391 /* The register isn't available, mark it as such (at
8392 the same time setting the value to zero). */
8393 regcache
->raw_supply (r
->regnum
, NULL
);
8396 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8402 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8405 process_g_packet (regcache
);
8408 /* Make the remote selected traceframe match GDB's selected
8412 remote_target::set_remote_traceframe ()
8415 struct remote_state
*rs
= get_remote_state ();
8417 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8420 /* Avoid recursion, remote_trace_find calls us again. */
8421 rs
->remote_traceframe_number
= get_traceframe_number ();
8423 newnum
= target_trace_find (tfind_number
,
8424 get_traceframe_number (), 0, 0, NULL
);
8426 /* Should not happen. If it does, all bets are off. */
8427 if (newnum
!= get_traceframe_number ())
8428 warning (_("could not set remote traceframe"));
8432 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8434 struct gdbarch
*gdbarch
= regcache
->arch ();
8435 struct remote_state
*rs
= get_remote_state ();
8436 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8439 set_remote_traceframe ();
8440 set_general_thread (regcache
->ptid ());
8444 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8446 gdb_assert (reg
!= NULL
);
8448 /* If this register might be in the 'g' packet, try that first -
8449 we are likely to read more than one register. If this is the
8450 first 'g' packet, we might be overly optimistic about its
8451 contents, so fall back to 'p'. */
8452 if (reg
->in_g_packet
)
8454 fetch_registers_using_g (regcache
);
8455 if (reg
->in_g_packet
)
8459 if (fetch_register_using_p (regcache
, reg
))
8462 /* This register is not available. */
8463 regcache
->raw_supply (reg
->regnum
, NULL
);
8468 fetch_registers_using_g (regcache
);
8470 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8471 if (!rsa
->regs
[i
].in_g_packet
)
8472 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8474 /* This register is not available. */
8475 regcache
->raw_supply (i
, NULL
);
8479 /* Prepare to store registers. Since we may send them all (using a
8480 'G' request), we have to read out the ones we don't want to change
8484 remote_target::prepare_to_store (struct regcache
*regcache
)
8486 struct remote_state
*rs
= get_remote_state ();
8487 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8490 /* Make sure the entire registers array is valid. */
8491 switch (packet_support (PACKET_P
))
8493 case PACKET_DISABLE
:
8494 case PACKET_SUPPORT_UNKNOWN
:
8495 /* Make sure all the necessary registers are cached. */
8496 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8497 if (rsa
->regs
[i
].in_g_packet
)
8498 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8505 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8506 packet was not recognized. */
8509 remote_target::store_register_using_P (const struct regcache
*regcache
,
8512 struct gdbarch
*gdbarch
= regcache
->arch ();
8513 struct remote_state
*rs
= get_remote_state ();
8514 /* Try storing a single register. */
8515 char *buf
= rs
->buf
.data ();
8516 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8519 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8522 if (reg
->pnum
== -1)
8525 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8526 p
= buf
+ strlen (buf
);
8527 regcache
->raw_collect (reg
->regnum
, regp
);
8528 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8530 getpkt (&rs
->buf
, 0);
8532 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8537 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8538 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8539 case PACKET_UNKNOWN
:
8542 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8546 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8547 contents of the register cache buffer. FIXME: ignores errors. */
8550 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8552 struct remote_state
*rs
= get_remote_state ();
8553 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8557 /* Extract all the registers in the regcache copying them into a
8562 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8563 memset (regs
, 0, rsa
->sizeof_g_packet
);
8564 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8566 struct packet_reg
*r
= &rsa
->regs
[i
];
8569 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8573 /* Command describes registers byte by byte,
8574 each byte encoded as two hex characters. */
8575 p
= rs
->buf
.data ();
8577 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8579 getpkt (&rs
->buf
, 0);
8580 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8581 error (_("Could not write registers; remote failure reply '%s'"),
8585 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8586 of the register cache buffer. FIXME: ignores errors. */
8589 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8591 struct gdbarch
*gdbarch
= regcache
->arch ();
8592 struct remote_state
*rs
= get_remote_state ();
8593 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8596 set_remote_traceframe ();
8597 set_general_thread (regcache
->ptid ());
8601 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8603 gdb_assert (reg
!= NULL
);
8605 /* Always prefer to store registers using the 'P' packet if
8606 possible; we often change only a small number of registers.
8607 Sometimes we change a larger number; we'd need help from a
8608 higher layer to know to use 'G'. */
8609 if (store_register_using_P (regcache
, reg
))
8612 /* For now, don't complain if we have no way to write the
8613 register. GDB loses track of unavailable registers too
8614 easily. Some day, this may be an error. We don't have
8615 any way to read the register, either... */
8616 if (!reg
->in_g_packet
)
8619 store_registers_using_G (regcache
);
8623 store_registers_using_G (regcache
);
8625 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8626 if (!rsa
->regs
[i
].in_g_packet
)
8627 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8628 /* See above for why we do not issue an error here. */
8633 /* Return the number of hex digits in num. */
8636 hexnumlen (ULONGEST num
)
8640 for (i
= 0; num
!= 0; i
++)
8643 return std::max (i
, 1);
8646 /* Set BUF to the minimum number of hex digits representing NUM. */
8649 hexnumstr (char *buf
, ULONGEST num
)
8651 int len
= hexnumlen (num
);
8653 return hexnumnstr (buf
, num
, len
);
8657 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8660 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8666 for (i
= width
- 1; i
>= 0; i
--)
8668 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8675 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8678 remote_address_masked (CORE_ADDR addr
)
8680 unsigned int address_size
= remote_address_size
;
8682 /* If "remoteaddresssize" was not set, default to target address size. */
8684 address_size
= gdbarch_addr_bit (target_gdbarch ());
8686 if (address_size
> 0
8687 && address_size
< (sizeof (ULONGEST
) * 8))
8689 /* Only create a mask when that mask can safely be constructed
8690 in a ULONGEST variable. */
8693 mask
= (mask
<< address_size
) - 1;
8699 /* Determine whether the remote target supports binary downloading.
8700 This is accomplished by sending a no-op memory write of zero length
8701 to the target at the specified address. It does not suffice to send
8702 the whole packet, since many stubs strip the eighth bit and
8703 subsequently compute a wrong checksum, which causes real havoc with
8706 NOTE: This can still lose if the serial line is not eight-bit
8707 clean. In cases like this, the user should clear "remote
8711 remote_target::check_binary_download (CORE_ADDR addr
)
8713 struct remote_state
*rs
= get_remote_state ();
8715 switch (packet_support (PACKET_X
))
8717 case PACKET_DISABLE
:
8721 case PACKET_SUPPORT_UNKNOWN
:
8725 p
= rs
->buf
.data ();
8727 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8729 p
+= hexnumstr (p
, (ULONGEST
) 0);
8733 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8734 getpkt (&rs
->buf
, 0);
8736 if (rs
->buf
[0] == '\0')
8738 remote_debug_printf ("binary downloading NOT supported by target");
8739 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8743 remote_debug_printf ("binary downloading supported by target");
8744 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8751 /* Helper function to resize the payload in order to try to get a good
8752 alignment. We try to write an amount of data such that the next write will
8753 start on an address aligned on REMOTE_ALIGN_WRITES. */
8756 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8758 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8761 /* Write memory data directly to the remote machine.
8762 This does not inform the data cache; the data cache uses this.
8763 HEADER is the starting part of the packet.
8764 MEMADDR is the address in the remote memory space.
8765 MYADDR is the address of the buffer in our space.
8766 LEN_UNITS is the number of addressable units to write.
8767 UNIT_SIZE is the length in bytes of an addressable unit.
8768 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8769 should send data as binary ('X'), or hex-encoded ('M').
8771 The function creates packet of the form
8772 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8774 where encoding of <DATA> is terminated by PACKET_FORMAT.
8776 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8779 Return the transferred status, error or OK (an
8780 'enum target_xfer_status' value). Save the number of addressable units
8781 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8783 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8784 exchange between gdb and the stub could look like (?? in place of the
8790 -> $M1000,3:eeeeffffeeee#??
8794 <- eeeeffffeeeedddd */
8797 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8798 const gdb_byte
*myaddr
,
8801 ULONGEST
*xfered_len_units
,
8802 char packet_format
, int use_length
)
8804 struct remote_state
*rs
= get_remote_state ();
8810 int payload_capacity_bytes
;
8811 int payload_length_bytes
;
8813 if (packet_format
!= 'X' && packet_format
!= 'M')
8814 internal_error (__FILE__
, __LINE__
,
8815 _("remote_write_bytes_aux: bad packet format"));
8818 return TARGET_XFER_EOF
;
8820 payload_capacity_bytes
= get_memory_write_packet_size ();
8822 /* The packet buffer will be large enough for the payload;
8823 get_memory_packet_size ensures this. */
8826 /* Compute the size of the actual payload by subtracting out the
8827 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8829 payload_capacity_bytes
-= strlen ("$,:#NN");
8831 /* The comma won't be used. */
8832 payload_capacity_bytes
+= 1;
8833 payload_capacity_bytes
-= strlen (header
);
8834 payload_capacity_bytes
-= hexnumlen (memaddr
);
8836 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8838 strcat (rs
->buf
.data (), header
);
8839 p
= rs
->buf
.data () + strlen (header
);
8841 /* Compute a best guess of the number of bytes actually transfered. */
8842 if (packet_format
== 'X')
8844 /* Best guess at number of bytes that will fit. */
8845 todo_units
= std::min (len_units
,
8846 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8848 payload_capacity_bytes
-= hexnumlen (todo_units
);
8849 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8853 /* Number of bytes that will fit. */
8855 = std::min (len_units
,
8856 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8858 payload_capacity_bytes
-= hexnumlen (todo_units
);
8859 todo_units
= std::min (todo_units
,
8860 (payload_capacity_bytes
/ unit_size
) / 2);
8863 if (todo_units
<= 0)
8864 internal_error (__FILE__
, __LINE__
,
8865 _("minimum packet size too small to write data"));
8867 /* If we already need another packet, then try to align the end
8868 of this packet to a useful boundary. */
8869 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8870 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8872 /* Append "<memaddr>". */
8873 memaddr
= remote_address_masked (memaddr
);
8874 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8881 /* Append the length and retain its location and size. It may need to be
8882 adjusted once the packet body has been created. */
8884 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8892 /* Append the packet body. */
8893 if (packet_format
== 'X')
8895 /* Binary mode. Send target system values byte by byte, in
8896 increasing byte addresses. Only escape certain critical
8898 payload_length_bytes
=
8899 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8900 &units_written
, payload_capacity_bytes
);
8902 /* If not all TODO units fit, then we'll need another packet. Make
8903 a second try to keep the end of the packet aligned. Don't do
8904 this if the packet is tiny. */
8905 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8909 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8911 if (new_todo_units
!= units_written
)
8912 payload_length_bytes
=
8913 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8914 (gdb_byte
*) p
, &units_written
,
8915 payload_capacity_bytes
);
8918 p
+= payload_length_bytes
;
8919 if (use_length
&& units_written
< todo_units
)
8921 /* Escape chars have filled up the buffer prematurely,
8922 and we have actually sent fewer units than planned.
8923 Fix-up the length field of the packet. Use the same
8924 number of characters as before. */
8925 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8927 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8932 /* Normal mode: Send target system values byte by byte, in
8933 increasing byte addresses. Each byte is encoded as a two hex
8935 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8936 units_written
= todo_units
;
8939 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8940 getpkt (&rs
->buf
, 0);
8942 if (rs
->buf
[0] == 'E')
8943 return TARGET_XFER_E_IO
;
8945 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8946 send fewer units than we'd planned. */
8947 *xfered_len_units
= (ULONGEST
) units_written
;
8948 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8951 /* Write memory data directly to the remote machine.
8952 This does not inform the data cache; the data cache uses this.
8953 MEMADDR is the address in the remote memory space.
8954 MYADDR is the address of the buffer in our space.
8955 LEN is the number of bytes.
8957 Return the transferred status, error or OK (an
8958 'enum target_xfer_status' value). Save the number of bytes
8959 transferred in *XFERED_LEN. Only transfer a single packet. */
8962 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
8963 ULONGEST len
, int unit_size
,
8964 ULONGEST
*xfered_len
)
8966 const char *packet_format
= NULL
;
8968 /* Check whether the target supports binary download. */
8969 check_binary_download (memaddr
);
8971 switch (packet_support (PACKET_X
))
8974 packet_format
= "X";
8976 case PACKET_DISABLE
:
8977 packet_format
= "M";
8979 case PACKET_SUPPORT_UNKNOWN
:
8980 internal_error (__FILE__
, __LINE__
,
8981 _("remote_write_bytes: bad internal state"));
8983 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8986 return remote_write_bytes_aux (packet_format
,
8987 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8988 packet_format
[0], 1);
8991 /* Read memory data directly from the remote machine.
8992 This does not use the data cache; the data cache uses this.
8993 MEMADDR is the address in the remote memory space.
8994 MYADDR is the address of the buffer in our space.
8995 LEN_UNITS is the number of addressable memory units to read..
8996 UNIT_SIZE is the length in bytes of an addressable unit.
8998 Return the transferred status, error or OK (an
8999 'enum target_xfer_status' value). Save the number of bytes
9000 transferred in *XFERED_LEN_UNITS.
9002 See the comment of remote_write_bytes_aux for an example of
9003 memory read/write exchange between gdb and the stub. */
9006 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
9008 int unit_size
, ULONGEST
*xfered_len_units
)
9010 struct remote_state
*rs
= get_remote_state ();
9011 int buf_size_bytes
; /* Max size of packet output buffer. */
9016 buf_size_bytes
= get_memory_read_packet_size ();
9017 /* The packet buffer will be large enough for the payload;
9018 get_memory_packet_size ensures this. */
9020 /* Number of units that will fit. */
9021 todo_units
= std::min (len_units
,
9022 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
9024 /* Construct "m"<memaddr>","<len>". */
9025 memaddr
= remote_address_masked (memaddr
);
9026 p
= rs
->buf
.data ();
9028 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
9030 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
9033 getpkt (&rs
->buf
, 0);
9034 if (rs
->buf
[0] == 'E'
9035 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
9036 && rs
->buf
[3] == '\0')
9037 return TARGET_XFER_E_IO
;
9038 /* Reply describes memory byte by byte, each byte encoded as two hex
9040 p
= rs
->buf
.data ();
9041 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
9042 /* Return what we have. Let higher layers handle partial reads. */
9043 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
9044 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
9047 /* Using the set of read-only target sections of remote, read live
9050 For interface/parameters/return description see target.h,
9054 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
9058 ULONGEST
*xfered_len
)
9060 const struct target_section
*secp
;
9062 secp
= target_section_by_addr (this, memaddr
);
9064 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
9066 ULONGEST memend
= memaddr
+ len
;
9068 const target_section_table
*table
= target_get_section_table (this);
9069 for (const target_section
&p
: *table
)
9071 if (memaddr
>= p
.addr
)
9073 if (memend
<= p
.endaddr
)
9075 /* Entire transfer is within this section. */
9076 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9079 else if (memaddr
>= p
.endaddr
)
9081 /* This section ends before the transfer starts. */
9086 /* This section overlaps the transfer. Just do half. */
9087 len
= p
.endaddr
- memaddr
;
9088 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
9095 return TARGET_XFER_EOF
;
9098 /* Similar to remote_read_bytes_1, but it reads from the remote stub
9099 first if the requested memory is unavailable in traceframe.
9100 Otherwise, fall back to remote_read_bytes_1. */
9103 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
9104 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
9105 ULONGEST
*xfered_len
)
9108 return TARGET_XFER_EOF
;
9110 if (get_traceframe_number () != -1)
9112 std::vector
<mem_range
> available
;
9114 /* If we fail to get the set of available memory, then the
9115 target does not support querying traceframe info, and so we
9116 attempt reading from the traceframe anyway (assuming the
9117 target implements the old QTro packet then). */
9118 if (traceframe_available_memory (&available
, memaddr
, len
))
9120 if (available
.empty () || available
[0].start
!= memaddr
)
9122 enum target_xfer_status res
;
9124 /* Don't read into the traceframe's available
9126 if (!available
.empty ())
9128 LONGEST oldlen
= len
;
9130 len
= available
[0].start
- memaddr
;
9131 gdb_assert (len
<= oldlen
);
9134 /* This goes through the topmost target again. */
9135 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
9136 len
, unit_size
, xfered_len
);
9137 if (res
== TARGET_XFER_OK
)
9138 return TARGET_XFER_OK
;
9141 /* No use trying further, we know some memory starting
9142 at MEMADDR isn't available. */
9144 return (*xfered_len
!= 0) ?
9145 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
9149 /* Don't try to read more than how much is available, in
9150 case the target implements the deprecated QTro packet to
9151 cater for older GDBs (the target's knowledge of read-only
9152 sections may be outdated by now). */
9153 len
= available
[0].length
;
9157 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
9162 /* Sends a packet with content determined by the printf format string
9163 FORMAT and the remaining arguments, then gets the reply. Returns
9164 whether the packet was a success, a failure, or unknown. */
9167 remote_target::remote_send_printf (const char *format
, ...)
9169 struct remote_state
*rs
= get_remote_state ();
9170 int max_size
= get_remote_packet_size ();
9173 va_start (ap
, format
);
9176 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
9180 if (size
>= max_size
)
9181 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
9183 if (putpkt (rs
->buf
) < 0)
9184 error (_("Communication problem with target."));
9187 getpkt (&rs
->buf
, 0);
9189 return packet_check_result (rs
->buf
);
9192 /* Flash writing can take quite some time. We'll set
9193 effectively infinite timeout for flash operations.
9194 In future, we'll need to decide on a better approach. */
9195 static const int remote_flash_timeout
= 1000;
9198 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9200 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9201 enum packet_result ret
;
9202 scoped_restore restore_timeout
9203 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9205 ret
= remote_send_printf ("vFlashErase:%s,%s",
9206 phex (address
, addr_size
),
9210 case PACKET_UNKNOWN
:
9211 error (_("Remote target does not support flash erase"));
9213 error (_("Error erasing flash with vFlashErase packet"));
9220 remote_target::remote_flash_write (ULONGEST address
,
9221 ULONGEST length
, ULONGEST
*xfered_len
,
9222 const gdb_byte
*data
)
9224 scoped_restore restore_timeout
9225 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9226 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9231 remote_target::flash_done ()
9235 scoped_restore restore_timeout
9236 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9238 ret
= remote_send_printf ("vFlashDone");
9242 case PACKET_UNKNOWN
:
9243 error (_("Remote target does not support vFlashDone"));
9245 error (_("Error finishing flash operation"));
9252 remote_target::files_info ()
9254 puts_filtered ("Debugging a target over a serial line.\n");
9257 /* Stuff for dealing with the packets which are part of this protocol.
9258 See comment at top of file for details. */
9260 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9261 error to higher layers. Called when a serial error is detected.
9262 The exception message is STRING, followed by a colon and a blank,
9263 the system error message for errno at function entry and final dot
9264 for output compatibility with throw_perror_with_name. */
9267 unpush_and_perror (remote_target
*target
, const char *string
)
9269 int saved_errno
= errno
;
9271 remote_unpush_target (target
);
9272 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9273 safe_strerror (saved_errno
));
9276 /* Read a single character from the remote end. The current quit
9277 handler is overridden to avoid quitting in the middle of packet
9278 sequence, as that would break communication with the remote server.
9279 See remote_serial_quit_handler for more detail. */
9282 remote_target::readchar (int timeout
)
9285 struct remote_state
*rs
= get_remote_state ();
9288 scoped_restore restore_quit_target
9289 = make_scoped_restore (&curr_quit_handler_target
, this);
9290 scoped_restore restore_quit
9291 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9293 rs
->got_ctrlc_during_io
= 0;
9295 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9297 if (rs
->got_ctrlc_during_io
)
9304 switch ((enum serial_rc
) ch
)
9307 remote_unpush_target (this);
9308 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9311 unpush_and_perror (this, _("Remote communication error. "
9312 "Target disconnected."));
9314 case SERIAL_TIMEOUT
:
9320 /* Wrapper for serial_write that closes the target and throws if
9321 writing fails. The current quit handler is overridden to avoid
9322 quitting in the middle of packet sequence, as that would break
9323 communication with the remote server. See
9324 remote_serial_quit_handler for more detail. */
9327 remote_target::remote_serial_write (const char *str
, int len
)
9329 struct remote_state
*rs
= get_remote_state ();
9331 scoped_restore restore_quit_target
9332 = make_scoped_restore (&curr_quit_handler_target
, this);
9333 scoped_restore restore_quit
9334 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9336 rs
->got_ctrlc_during_io
= 0;
9338 if (serial_write (rs
->remote_desc
, str
, len
))
9340 unpush_and_perror (this, _("Remote communication error. "
9341 "Target disconnected."));
9344 if (rs
->got_ctrlc_during_io
)
9348 /* Return a string representing an escaped version of BUF, of len N.
9349 E.g. \n is converted to \\n, \t to \\t, etc. */
9352 escape_buffer (const char *buf
, int n
)
9356 stb
.putstrn (buf
, n
, '\\');
9357 return std::move (stb
.string ());
9360 /* Display a null-terminated packet on stdout, for debugging, using C
9364 print_packet (const char *buf
)
9366 puts_filtered ("\"");
9367 fputstr_filtered (buf
, '"', gdb_stdout
);
9368 puts_filtered ("\"");
9372 remote_target::putpkt (const char *buf
)
9374 return putpkt_binary (buf
, strlen (buf
));
9377 /* Wrapper around remote_target::putpkt to avoid exporting
9381 putpkt (remote_target
*remote
, const char *buf
)
9383 return remote
->putpkt (buf
);
9386 /* Send a packet to the remote machine, with error checking. The data
9387 of the packet is in BUF. The string in BUF can be at most
9388 get_remote_packet_size () - 5 to account for the $, # and checksum,
9389 and for a possible /0 if we are debugging (remote_debug) and want
9390 to print the sent packet as a string. */
9393 remote_target::putpkt_binary (const char *buf
, int cnt
)
9395 struct remote_state
*rs
= get_remote_state ();
9397 unsigned char csum
= 0;
9398 gdb::def_vector
<char> data (cnt
+ 6);
9399 char *buf2
= data
.data ();
9405 /* Catch cases like trying to read memory or listing threads while
9406 we're waiting for a stop reply. The remote server wouldn't be
9407 ready to handle this request, so we'd hang and timeout. We don't
9408 have to worry about this in synchronous mode, because in that
9409 case it's not possible to issue a command while the target is
9410 running. This is not a problem in non-stop mode, because in that
9411 case, the stub is always ready to process serial input. */
9412 if (!target_is_non_stop_p ()
9413 && target_is_async_p ()
9414 && rs
->waiting_for_stop_reply
)
9416 error (_("Cannot execute this command while the target is running.\n"
9417 "Use the \"interrupt\" command to stop the target\n"
9418 "and then try again."));
9421 /* We're sending out a new packet. Make sure we don't look at a
9422 stale cached response. */
9423 rs
->cached_wait_status
= 0;
9425 /* Copy the packet into buffer BUF2, encapsulating it
9426 and giving it a checksum. */
9431 for (i
= 0; i
< cnt
; i
++)
9437 *p
++ = tohex ((csum
>> 4) & 0xf);
9438 *p
++ = tohex (csum
& 0xf);
9440 /* Send it over and over until we get a positive ack. */
9448 int len
= (int) (p
- buf2
);
9451 if (remote_packet_max_chars
< 0)
9454 max_chars
= remote_packet_max_chars
;
9457 = escape_buffer (buf2
, std::min (len
, max_chars
));
9459 if (len
> max_chars
)
9460 remote_debug_printf_nofunc
9461 ("Sending packet: %s [%d bytes omitted]", str
.c_str (),
9464 remote_debug_printf_nofunc ("Sending packet: %s", str
.c_str ());
9466 remote_serial_write (buf2
, p
- buf2
);
9468 /* If this is a no acks version of the remote protocol, send the
9469 packet and move on. */
9473 /* Read until either a timeout occurs (-2) or '+' is read.
9474 Handle any notification that arrives in the mean time. */
9477 ch
= readchar (remote_timeout
);
9482 remote_debug_printf_nofunc ("Received Ack");
9485 remote_debug_printf_nofunc ("Received Nak");
9487 case SERIAL_TIMEOUT
:
9491 break; /* Retransmit buffer. */
9494 remote_debug_printf ("Packet instead of Ack, ignoring it");
9495 /* It's probably an old response sent because an ACK
9496 was lost. Gobble up the packet and ack it so it
9497 doesn't get retransmitted when we resend this
9500 remote_serial_write ("+", 1);
9501 continue; /* Now, go look for +. */
9508 /* If we got a notification, handle it, and go back to looking
9510 /* We've found the start of a notification. Now
9511 collect the data. */
9512 val
= read_frame (&rs
->buf
);
9515 remote_debug_printf_nofunc
9516 (" Notification received: %s",
9517 escape_buffer (rs
->buf
.data (), val
).c_str ());
9519 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9520 /* We're in sync now, rewait for the ack. */
9524 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9530 remote_debug_printf_nofunc ("Junk: %c%s", ch
& 0177,
9534 break; /* Here to retransmit. */
9538 /* This is wrong. If doing a long backtrace, the user should be
9539 able to get out next time we call QUIT, without anything as
9540 violent as interrupt_query. If we want to provide a way out of
9541 here without getting to the next QUIT, it should be based on
9542 hitting ^C twice as in remote_wait. */
9554 /* Come here after finding the start of a frame when we expected an
9555 ack. Do our best to discard the rest of this packet. */
9558 remote_target::skip_frame ()
9564 c
= readchar (remote_timeout
);
9567 case SERIAL_TIMEOUT
:
9568 /* Nothing we can do. */
9571 /* Discard the two bytes of checksum and stop. */
9572 c
= readchar (remote_timeout
);
9574 c
= readchar (remote_timeout
);
9577 case '*': /* Run length encoding. */
9578 /* Discard the repeat count. */
9579 c
= readchar (remote_timeout
);
9584 /* A regular character. */
9590 /* Come here after finding the start of the frame. Collect the rest
9591 into *BUF, verifying the checksum, length, and handling run-length
9592 compression. NUL terminate the buffer. If there is not enough room,
9595 Returns -1 on error, number of characters in buffer (ignoring the
9596 trailing NULL) on success. (could be extended to return one of the
9597 SERIAL status indications). */
9600 remote_target::read_frame (gdb::char_vector
*buf_p
)
9605 char *buf
= buf_p
->data ();
9606 struct remote_state
*rs
= get_remote_state ();
9613 c
= readchar (remote_timeout
);
9616 case SERIAL_TIMEOUT
:
9617 remote_debug_printf ("Timeout in mid-packet, retrying");
9621 remote_debug_printf ("Saw new packet start in middle of old one");
9622 return -1; /* Start a new packet, count retries. */
9626 unsigned char pktcsum
;
9632 check_0
= readchar (remote_timeout
);
9634 check_1
= readchar (remote_timeout
);
9636 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9638 remote_debug_printf ("Timeout in checksum, retrying");
9641 else if (check_0
< 0 || check_1
< 0)
9643 remote_debug_printf ("Communication error in checksum");
9647 /* Don't recompute the checksum; with no ack packets we
9648 don't have any way to indicate a packet retransmission
9653 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9654 if (csum
== pktcsum
)
9658 ("Bad checksum, sentsum=0x%x, csum=0x%x, buf=%s",
9659 pktcsum
, csum
, escape_buffer (buf
, bc
).c_str ());
9661 /* Number of characters in buffer ignoring trailing
9665 case '*': /* Run length encoding. */
9670 c
= readchar (remote_timeout
);
9672 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9674 /* The character before ``*'' is repeated. */
9676 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9678 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9680 /* Make some more room in the buffer. */
9681 buf_p
->resize (buf_p
->size () + repeat
);
9682 buf
= buf_p
->data ();
9685 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9691 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9695 if (bc
>= buf_p
->size () - 1)
9697 /* Make some more room in the buffer. */
9698 buf_p
->resize (buf_p
->size () * 2);
9699 buf
= buf_p
->data ();
9709 /* Set this to the maximum number of seconds to wait instead of waiting forever
9710 in target_wait(). If this timer times out, then it generates an error and
9711 the command is aborted. This replaces most of the need for timeouts in the
9712 GDB test suite, and makes it possible to distinguish between a hung target
9713 and one with slow communications. */
9715 static int watchdog
= 0;
9717 show_watchdog (struct ui_file
*file
, int from_tty
,
9718 struct cmd_list_element
*c
, const char *value
)
9720 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
9723 /* Read a packet from the remote machine, with error checking, and
9724 store it in *BUF. Resize *BUF if necessary to hold the result. If
9725 FOREVER, wait forever rather than timing out; this is used (in
9726 synchronous mode) to wait for a target that is is executing user
9728 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9729 don't have to change all the calls to getpkt to deal with the
9730 return value, because at the moment I don't know what the right
9731 thing to do it for those. */
9734 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9736 getpkt_sane (buf
, forever
);
9740 /* Read a packet from the remote machine, with error checking, and
9741 store it in *BUF. Resize *BUF if necessary to hold the result. If
9742 FOREVER, wait forever rather than timing out; this is used (in
9743 synchronous mode) to wait for a target that is is executing user
9744 code to stop. If FOREVER == 0, this function is allowed to time
9745 out gracefully and return an indication of this to the caller.
9746 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9747 consider receiving a notification enough reason to return to the
9748 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9749 holds a notification or not (a regular packet). */
9752 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9753 int forever
, int expecting_notif
,
9756 struct remote_state
*rs
= get_remote_state ();
9762 /* We're reading a new response. Make sure we don't look at a
9763 previously cached response. */
9764 rs
->cached_wait_status
= 0;
9766 strcpy (buf
->data (), "timeout");
9769 timeout
= watchdog
> 0 ? watchdog
: -1;
9770 else if (expecting_notif
)
9771 timeout
= 0; /* There should already be a char in the buffer. If
9774 timeout
= remote_timeout
;
9778 /* Process any number of notifications, and then return when
9782 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9784 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9786 /* This can loop forever if the remote side sends us
9787 characters continuously, but if it pauses, we'll get
9788 SERIAL_TIMEOUT from readchar because of timeout. Then
9789 we'll count that as a retry.
9791 Note that even when forever is set, we will only wait
9792 forever prior to the start of a packet. After that, we
9793 expect characters to arrive at a brisk pace. They should
9794 show up within remote_timeout intervals. */
9796 c
= readchar (timeout
);
9797 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9799 if (c
== SERIAL_TIMEOUT
)
9801 if (expecting_notif
)
9802 return -1; /* Don't complain, it's normal to not get
9803 anything in this case. */
9805 if (forever
) /* Watchdog went off? Kill the target. */
9807 remote_unpush_target (this);
9808 throw_error (TARGET_CLOSE_ERROR
,
9809 _("Watchdog timeout has expired. "
9810 "Target detached."));
9813 remote_debug_printf ("Timed out.");
9817 /* We've found the start of a packet or notification.
9818 Now collect the data. */
9819 val
= read_frame (buf
);
9824 remote_serial_write ("-", 1);
9827 if (tries
> MAX_TRIES
)
9829 /* We have tried hard enough, and just can't receive the
9830 packet/notification. Give up. */
9831 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9833 /* Skip the ack char if we're in no-ack mode. */
9834 if (!rs
->noack_mode
)
9835 remote_serial_write ("+", 1);
9839 /* If we got an ordinary packet, return that to our caller. */
9846 if (remote_packet_max_chars
< 0)
9849 max_chars
= remote_packet_max_chars
;
9852 = escape_buffer (buf
->data (),
9853 std::min (val
, max_chars
));
9855 if (val
> max_chars
)
9856 remote_debug_printf_nofunc
9857 ("Packet received: %s [%d bytes omitted]", str
.c_str (),
9860 remote_debug_printf_nofunc ("Packet received: %s",
9864 /* Skip the ack char if we're in no-ack mode. */
9865 if (!rs
->noack_mode
)
9866 remote_serial_write ("+", 1);
9867 if (is_notif
!= NULL
)
9872 /* If we got a notification, handle it, and go back to looking
9876 gdb_assert (c
== '%');
9878 remote_debug_printf_nofunc
9879 (" Notification received: %s",
9880 escape_buffer (buf
->data (), val
).c_str ());
9882 if (is_notif
!= NULL
)
9885 handle_notification (rs
->notif_state
, buf
->data ());
9887 /* Notifications require no acknowledgement. */
9889 if (expecting_notif
)
9896 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
9898 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
9902 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
9905 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
9908 /* Kill any new fork children of process PID that haven't been
9909 processed by follow_fork. */
9912 remote_target::kill_new_fork_children (int pid
)
9914 remote_state
*rs
= get_remote_state ();
9915 struct notif_client
*notif
= ¬if_client_stop
;
9917 /* Kill the fork child threads of any threads in process PID
9918 that are stopped at a fork event. */
9919 for (thread_info
*thread
: all_non_exited_threads (this))
9921 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9923 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9925 int child_pid
= ws
->value
.related_pid
.pid ();
9928 res
= remote_vkill (child_pid
);
9930 error (_("Can't kill fork child process %d"), child_pid
);
9934 /* Check for any pending fork events (not reported or processed yet)
9935 in process PID and kill those fork child threads as well. */
9936 remote_notif_get_pending_events (notif
);
9937 for (auto &event
: rs
->stop_reply_queue
)
9938 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
9940 int child_pid
= event
->ws
.value
.related_pid
.pid ();
9943 res
= remote_vkill (child_pid
);
9945 error (_("Can't kill fork child process %d"), child_pid
);
9950 /* Target hook to kill the current inferior. */
9953 remote_target::kill ()
9956 int pid
= inferior_ptid
.pid ();
9957 struct remote_state
*rs
= get_remote_state ();
9959 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9961 /* If we're stopped while forking and we haven't followed yet,
9962 kill the child task. We need to do this before killing the
9963 parent task because if this is a vfork then the parent will
9965 kill_new_fork_children (pid
);
9967 res
= remote_vkill (pid
);
9970 target_mourn_inferior (inferior_ptid
);
9975 /* If we are in 'target remote' mode and we are killing the only
9976 inferior, then we will tell gdbserver to exit and unpush the
9978 if (res
== -1 && !remote_multi_process_p (rs
)
9979 && number_of_live_inferiors (this) == 1)
9983 /* We've killed the remote end, we get to mourn it. If we are
9984 not in extended mode, mourning the inferior also unpushes
9985 remote_ops from the target stack, which closes the remote
9987 target_mourn_inferior (inferior_ptid
);
9992 error (_("Can't kill process"));
9995 /* Send a kill request to the target using the 'vKill' packet. */
9998 remote_target::remote_vkill (int pid
)
10000 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
10003 remote_state
*rs
= get_remote_state ();
10005 /* Tell the remote target to detach. */
10006 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
10008 getpkt (&rs
->buf
, 0);
10010 switch (packet_ok (rs
->buf
,
10011 &remote_protocol_packets
[PACKET_vKill
]))
10017 case PACKET_UNKNOWN
:
10020 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
10024 /* Send a kill request to the target using the 'k' packet. */
10027 remote_target::remote_kill_k ()
10029 /* Catch errors so the user can quit from gdb even when we
10030 aren't on speaking terms with the remote system. */
10035 catch (const gdb_exception_error
&ex
)
10037 if (ex
.error
== TARGET_CLOSE_ERROR
)
10039 /* If we got an (EOF) error that caused the target
10040 to go away, then we're done, that's what we wanted.
10041 "k" is susceptible to cause a premature EOF, given
10042 that the remote server isn't actually required to
10043 reply to "k", and it can happen that it doesn't
10044 even get to reply ACK to the "k". */
10048 /* Otherwise, something went wrong. We didn't actually kill
10049 the target. Just propagate the exception, and let the
10050 user or higher layers decide what to do. */
10056 remote_target::mourn_inferior ()
10058 struct remote_state
*rs
= get_remote_state ();
10060 /* We're no longer interested in notification events of an inferior
10061 that exited or was killed/detached. */
10062 discard_pending_stop_replies (current_inferior ());
10064 /* In 'target remote' mode with one inferior, we close the connection. */
10065 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
10067 remote_unpush_target (this);
10071 /* In case we got here due to an error, but we're going to stay
10073 rs
->waiting_for_stop_reply
= 0;
10075 /* If the current general thread belonged to the process we just
10076 detached from or has exited, the remote side current general
10077 thread becomes undefined. Considering a case like this:
10079 - We just got here due to a detach.
10080 - The process that we're detaching from happens to immediately
10081 report a global breakpoint being hit in non-stop mode, in the
10082 same thread we had selected before.
10083 - GDB attaches to this process again.
10084 - This event happens to be the next event we handle.
10086 GDB would consider that the current general thread didn't need to
10087 be set on the stub side (with Hg), since for all it knew,
10088 GENERAL_THREAD hadn't changed.
10090 Notice that although in all-stop mode, the remote server always
10091 sets the current thread to the thread reporting the stop event,
10092 that doesn't happen in non-stop mode; in non-stop, the stub *must
10093 not* change the current thread when reporting a breakpoint hit,
10094 due to the decoupling of event reporting and event handling.
10096 To keep things simple, we always invalidate our notion of the
10098 record_currthread (rs
, minus_one_ptid
);
10100 /* Call common code to mark the inferior as not running. */
10101 generic_mourn_inferior ();
10105 extended_remote_target::supports_disable_randomization ()
10107 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
10111 remote_target::extended_remote_disable_randomization (int val
)
10113 struct remote_state
*rs
= get_remote_state ();
10116 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10117 "QDisableRandomization:%x", val
);
10119 reply
= remote_get_noisy_reply ();
10120 if (*reply
== '\0')
10121 error (_("Target does not support QDisableRandomization."));
10122 if (strcmp (reply
, "OK") != 0)
10123 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10127 remote_target::extended_remote_run (const std::string
&args
)
10129 struct remote_state
*rs
= get_remote_state ();
10131 const char *remote_exec_file
= get_remote_exec_file ();
10133 /* If the user has disabled vRun support, or we have detected that
10134 support is not available, do not try it. */
10135 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10138 strcpy (rs
->buf
.data (), "vRun;");
10139 len
= strlen (rs
->buf
.data ());
10141 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10142 error (_("Remote file name too long for run packet"));
10143 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10144 strlen (remote_exec_file
));
10146 if (!args
.empty ())
10150 gdb_argv
argv (args
.c_str ());
10151 for (i
= 0; argv
[i
] != NULL
; i
++)
10153 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10154 error (_("Argument list too long for run packet"));
10155 rs
->buf
[len
++] = ';';
10156 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10161 rs
->buf
[len
++] = '\0';
10164 getpkt (&rs
->buf
, 0);
10166 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10169 /* We have a wait response. All is well. */
10171 case PACKET_UNKNOWN
:
10174 if (remote_exec_file
[0] == '\0')
10175 error (_("Running the default executable on the remote target failed; "
10176 "try \"set remote exec-file\"?"));
10178 error (_("Running \"%s\" on the remote target failed"),
10181 gdb_assert_not_reached (_("bad switch"));
10185 /* Helper function to send set/unset environment packets. ACTION is
10186 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10187 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10191 remote_target::send_environment_packet (const char *action
,
10192 const char *packet
,
10195 remote_state
*rs
= get_remote_state ();
10197 /* Convert the environment variable to an hex string, which
10198 is the best format to be transmitted over the wire. */
10199 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10202 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10203 "%s:%s", packet
, encoded_value
.c_str ());
10206 getpkt (&rs
->buf
, 0);
10207 if (strcmp (rs
->buf
.data (), "OK") != 0)
10208 warning (_("Unable to %s environment variable '%s' on remote."),
10212 /* Helper function to handle the QEnvironment* packets. */
10215 remote_target::extended_remote_environment_support ()
10217 remote_state
*rs
= get_remote_state ();
10219 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10221 putpkt ("QEnvironmentReset");
10222 getpkt (&rs
->buf
, 0);
10223 if (strcmp (rs
->buf
.data (), "OK") != 0)
10224 warning (_("Unable to reset environment on remote."));
10227 gdb_environ
*e
= ¤t_inferior ()->environment
;
10229 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10230 for (const std::string
&el
: e
->user_set_env ())
10231 send_environment_packet ("set", "QEnvironmentHexEncoded",
10234 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10235 for (const std::string
&el
: e
->user_unset_env ())
10236 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10239 /* Helper function to set the current working directory for the
10240 inferior in the remote target. */
10243 remote_target::extended_remote_set_inferior_cwd ()
10245 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10247 const char *inferior_cwd
= get_inferior_cwd ();
10248 remote_state
*rs
= get_remote_state ();
10250 if (inferior_cwd
!= NULL
)
10252 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10253 strlen (inferior_cwd
));
10255 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10256 "QSetWorkingDir:%s", hexpath
.c_str ());
10260 /* An empty inferior_cwd means that the user wants us to
10261 reset the remote server's inferior's cwd. */
10262 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10263 "QSetWorkingDir:");
10267 getpkt (&rs
->buf
, 0);
10268 if (packet_ok (rs
->buf
,
10269 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10272 Remote replied unexpectedly while setting the inferior's working\n\
10279 /* In the extended protocol we want to be able to do things like
10280 "run" and have them basically work as expected. So we need
10281 a special create_inferior function. We support changing the
10282 executable file and the command line arguments, but not the
10286 extended_remote_target::create_inferior (const char *exec_file
,
10287 const std::string
&args
,
10288 char **env
, int from_tty
)
10292 struct remote_state
*rs
= get_remote_state ();
10293 const char *remote_exec_file
= get_remote_exec_file ();
10295 /* If running asynchronously, register the target file descriptor
10296 with the event loop. */
10297 if (target_can_async_p ())
10300 /* Disable address space randomization if requested (and supported). */
10301 if (supports_disable_randomization ())
10302 extended_remote_disable_randomization (disable_randomization
);
10304 /* If startup-with-shell is on, we inform gdbserver to start the
10305 remote inferior using a shell. */
10306 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10308 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10309 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10311 getpkt (&rs
->buf
, 0);
10312 if (strcmp (rs
->buf
.data (), "OK") != 0)
10314 Remote replied unexpectedly while setting startup-with-shell: %s"),
10318 extended_remote_environment_support ();
10320 extended_remote_set_inferior_cwd ();
10322 /* Now restart the remote server. */
10323 run_worked
= extended_remote_run (args
) != -1;
10326 /* vRun was not supported. Fail if we need it to do what the
10328 if (remote_exec_file
[0])
10329 error (_("Remote target does not support \"set remote exec-file\""));
10330 if (!args
.empty ())
10331 error (_("Remote target does not support \"set args\" or run ARGS"));
10333 /* Fall back to "R". */
10334 extended_remote_restart ();
10337 /* vRun's success return is a stop reply. */
10338 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10339 add_current_inferior_and_thread (stop_reply
);
10341 /* Get updated offsets, if the stub uses qOffsets. */
10346 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10347 the list of conditions (in agent expression bytecode format), if any, the
10348 target needs to evaluate. The output is placed into the packet buffer
10349 started from BUF and ended at BUF_END. */
10352 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10353 struct bp_target_info
*bp_tgt
, char *buf
,
10356 if (bp_tgt
->conditions
.empty ())
10359 buf
+= strlen (buf
);
10360 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10363 /* Send conditions to the target. */
10364 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10366 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10367 buf
+= strlen (buf
);
10368 for (int i
= 0; i
< aexpr
->len
; ++i
)
10369 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10376 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10377 struct bp_target_info
*bp_tgt
, char *buf
)
10379 if (bp_tgt
->tcommands
.empty ())
10382 buf
+= strlen (buf
);
10384 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10385 buf
+= strlen (buf
);
10387 /* Concatenate all the agent expressions that are commands into the
10389 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10391 sprintf (buf
, "X%x,", aexpr
->len
);
10392 buf
+= strlen (buf
);
10393 for (int i
= 0; i
< aexpr
->len
; ++i
)
10394 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10399 /* Insert a breakpoint. On targets that have software breakpoint
10400 support, we ask the remote target to do the work; on targets
10401 which don't, we insert a traditional memory breakpoint. */
10404 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10405 struct bp_target_info
*bp_tgt
)
10407 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10408 If it succeeds, then set the support to PACKET_ENABLE. If it
10409 fails, and the user has explicitly requested the Z support then
10410 report an error, otherwise, mark it disabled and go on. */
10412 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10414 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10415 struct remote_state
*rs
;
10418 /* Make sure the remote is pointing at the right process, if
10420 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10421 set_general_process ();
10423 rs
= get_remote_state ();
10424 p
= rs
->buf
.data ();
10425 endbuf
= p
+ get_remote_packet_size ();
10430 addr
= (ULONGEST
) remote_address_masked (addr
);
10431 p
+= hexnumstr (p
, addr
);
10432 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10434 if (supports_evaluation_of_breakpoint_conditions ())
10435 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10437 if (can_run_breakpoint_commands ())
10438 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10441 getpkt (&rs
->buf
, 0);
10443 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10449 case PACKET_UNKNOWN
:
10454 /* If this breakpoint has target-side commands but this stub doesn't
10455 support Z0 packets, throw error. */
10456 if (!bp_tgt
->tcommands
.empty ())
10457 throw_error (NOT_SUPPORTED_ERROR
, _("\
10458 Target doesn't support breakpoints that have target side commands."));
10460 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10464 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10465 struct bp_target_info
*bp_tgt
,
10466 enum remove_bp_reason reason
)
10468 CORE_ADDR addr
= bp_tgt
->placed_address
;
10469 struct remote_state
*rs
= get_remote_state ();
10471 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10473 char *p
= rs
->buf
.data ();
10474 char *endbuf
= p
+ get_remote_packet_size ();
10476 /* Make sure the remote is pointing at the right process, if
10478 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10479 set_general_process ();
10485 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10486 p
+= hexnumstr (p
, addr
);
10487 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10490 getpkt (&rs
->buf
, 0);
10492 return (rs
->buf
[0] == 'E');
10495 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10498 static enum Z_packet_type
10499 watchpoint_to_Z_packet (int type
)
10504 return Z_PACKET_WRITE_WP
;
10507 return Z_PACKET_READ_WP
;
10510 return Z_PACKET_ACCESS_WP
;
10513 internal_error (__FILE__
, __LINE__
,
10514 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10519 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10520 enum target_hw_bp_type type
, struct expression
*cond
)
10522 struct remote_state
*rs
= get_remote_state ();
10523 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10525 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10527 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10530 /* Make sure the remote is pointing at the right process, if
10532 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10533 set_general_process ();
10535 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10536 p
= strchr (rs
->buf
.data (), '\0');
10537 addr
= remote_address_masked (addr
);
10538 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10539 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10542 getpkt (&rs
->buf
, 0);
10544 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10548 case PACKET_UNKNOWN
:
10553 internal_error (__FILE__
, __LINE__
,
10554 _("remote_insert_watchpoint: reached end of function"));
10558 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10559 CORE_ADDR start
, int length
)
10561 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10563 return diff
< length
;
10568 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10569 enum target_hw_bp_type type
, struct expression
*cond
)
10571 struct remote_state
*rs
= get_remote_state ();
10572 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10574 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10576 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10579 /* Make sure the remote is pointing at the right process, if
10581 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10582 set_general_process ();
10584 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10585 p
= strchr (rs
->buf
.data (), '\0');
10586 addr
= remote_address_masked (addr
);
10587 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10588 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10590 getpkt (&rs
->buf
, 0);
10592 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10595 case PACKET_UNKNOWN
:
10600 internal_error (__FILE__
, __LINE__
,
10601 _("remote_remove_watchpoint: reached end of function"));
10605 static int remote_hw_watchpoint_limit
= -1;
10606 static int remote_hw_watchpoint_length_limit
= -1;
10607 static int remote_hw_breakpoint_limit
= -1;
10610 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10612 if (remote_hw_watchpoint_length_limit
== 0)
10614 else if (remote_hw_watchpoint_length_limit
< 0)
10616 else if (len
<= remote_hw_watchpoint_length_limit
)
10623 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10625 if (type
== bp_hardware_breakpoint
)
10627 if (remote_hw_breakpoint_limit
== 0)
10629 else if (remote_hw_breakpoint_limit
< 0)
10631 else if (cnt
<= remote_hw_breakpoint_limit
)
10636 if (remote_hw_watchpoint_limit
== 0)
10638 else if (remote_hw_watchpoint_limit
< 0)
10642 else if (cnt
<= remote_hw_watchpoint_limit
)
10648 /* The to_stopped_by_sw_breakpoint method of target remote. */
10651 remote_target::stopped_by_sw_breakpoint ()
10653 struct thread_info
*thread
= inferior_thread ();
10655 return (thread
->priv
!= NULL
10656 && (get_remote_thread_info (thread
)->stop_reason
10657 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10660 /* The to_supports_stopped_by_sw_breakpoint method of target
10664 remote_target::supports_stopped_by_sw_breakpoint ()
10666 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10669 /* The to_stopped_by_hw_breakpoint method of target remote. */
10672 remote_target::stopped_by_hw_breakpoint ()
10674 struct thread_info
*thread
= inferior_thread ();
10676 return (thread
->priv
!= NULL
10677 && (get_remote_thread_info (thread
)->stop_reason
10678 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10681 /* The to_supports_stopped_by_hw_breakpoint method of target
10685 remote_target::supports_stopped_by_hw_breakpoint ()
10687 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10691 remote_target::stopped_by_watchpoint ()
10693 struct thread_info
*thread
= inferior_thread ();
10695 return (thread
->priv
!= NULL
10696 && (get_remote_thread_info (thread
)->stop_reason
10697 == TARGET_STOPPED_BY_WATCHPOINT
));
10701 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10703 struct thread_info
*thread
= inferior_thread ();
10705 if (thread
->priv
!= NULL
10706 && (get_remote_thread_info (thread
)->stop_reason
10707 == TARGET_STOPPED_BY_WATCHPOINT
))
10709 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10718 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10719 struct bp_target_info
*bp_tgt
)
10721 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10722 struct remote_state
*rs
;
10726 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10729 /* Make sure the remote is pointing at the right process, if
10731 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10732 set_general_process ();
10734 rs
= get_remote_state ();
10735 p
= rs
->buf
.data ();
10736 endbuf
= p
+ get_remote_packet_size ();
10742 addr
= remote_address_masked (addr
);
10743 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10744 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10746 if (supports_evaluation_of_breakpoint_conditions ())
10747 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10749 if (can_run_breakpoint_commands ())
10750 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10753 getpkt (&rs
->buf
, 0);
10755 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10758 if (rs
->buf
[1] == '.')
10760 message
= strchr (&rs
->buf
[2], '.');
10762 error (_("Remote failure reply: %s"), message
+ 1);
10765 case PACKET_UNKNOWN
:
10770 internal_error (__FILE__
, __LINE__
,
10771 _("remote_insert_hw_breakpoint: reached end of function"));
10776 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10777 struct bp_target_info
*bp_tgt
)
10780 struct remote_state
*rs
= get_remote_state ();
10781 char *p
= rs
->buf
.data ();
10782 char *endbuf
= p
+ get_remote_packet_size ();
10784 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10787 /* Make sure the remote is pointing at the right process, if
10789 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10790 set_general_process ();
10796 addr
= remote_address_masked (bp_tgt
->placed_address
);
10797 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10798 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10801 getpkt (&rs
->buf
, 0);
10803 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10806 case PACKET_UNKNOWN
:
10811 internal_error (__FILE__
, __LINE__
,
10812 _("remote_remove_hw_breakpoint: reached end of function"));
10815 /* Verify memory using the "qCRC:" request. */
10818 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10820 struct remote_state
*rs
= get_remote_state ();
10821 unsigned long host_crc
, target_crc
;
10824 /* It doesn't make sense to use qCRC if the remote target is
10825 connected but not running. */
10826 if (target_has_execution ()
10827 && packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10829 enum packet_result result
;
10831 /* Make sure the remote is pointing at the right process. */
10832 set_general_process ();
10834 /* FIXME: assumes lma can fit into long. */
10835 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10836 (long) lma
, (long) size
);
10839 /* Be clever; compute the host_crc before waiting for target
10841 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10843 getpkt (&rs
->buf
, 0);
10845 result
= packet_ok (rs
->buf
,
10846 &remote_protocol_packets
[PACKET_qCRC
]);
10847 if (result
== PACKET_ERROR
)
10849 else if (result
== PACKET_OK
)
10851 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10852 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10854 return (host_crc
== target_crc
);
10858 return simple_verify_memory (this, data
, lma
, size
);
10861 /* compare-sections command
10863 With no arguments, compares each loadable section in the exec bfd
10864 with the same memory range on the target, and reports mismatches.
10865 Useful for verifying the image on the target against the exec file. */
10868 compare_sections_command (const char *args
, int from_tty
)
10871 const char *sectname
;
10872 bfd_size_type size
;
10875 int mismatched
= 0;
10879 if (!current_program_space
->exec_bfd ())
10880 error (_("command cannot be used without an exec file"));
10882 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10888 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
10890 if (!(s
->flags
& SEC_LOAD
))
10891 continue; /* Skip non-loadable section. */
10893 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10894 continue; /* Skip writeable sections */
10896 size
= bfd_section_size (s
);
10898 continue; /* Skip zero-length section. */
10900 sectname
= bfd_section_name (s
);
10901 if (args
&& strcmp (args
, sectname
) != 0)
10902 continue; /* Not the section selected by user. */
10904 matched
= 1; /* Do this section. */
10907 gdb::byte_vector
sectdata (size
);
10908 bfd_get_section_contents (current_program_space
->exec_bfd (), s
,
10909 sectdata
.data (), 0, size
);
10911 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10914 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10915 paddress (target_gdbarch (), lma
),
10916 paddress (target_gdbarch (), lma
+ size
));
10918 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10919 paddress (target_gdbarch (), lma
),
10920 paddress (target_gdbarch (), lma
+ size
));
10922 printf_filtered ("matched.\n");
10925 printf_filtered ("MIS-MATCHED!\n");
10929 if (mismatched
> 0)
10930 warning (_("One or more sections of the target image does not match\n\
10931 the loaded file\n"));
10932 if (args
&& !matched
)
10933 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10936 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10937 into remote target. The number of bytes written to the remote
10938 target is returned, or -1 for error. */
10941 remote_target::remote_write_qxfer (const char *object_name
,
10942 const char *annex
, const gdb_byte
*writebuf
,
10943 ULONGEST offset
, LONGEST len
,
10944 ULONGEST
*xfered_len
,
10945 struct packet_config
*packet
)
10949 struct remote_state
*rs
= get_remote_state ();
10950 int max_size
= get_memory_write_packet_size ();
10952 if (packet_config_support (packet
) == PACKET_DISABLE
)
10953 return TARGET_XFER_E_IO
;
10955 /* Insert header. */
10956 i
= snprintf (rs
->buf
.data (), max_size
,
10957 "qXfer:%s:write:%s:%s:",
10958 object_name
, annex
? annex
: "",
10959 phex_nz (offset
, sizeof offset
));
10960 max_size
-= (i
+ 1);
10962 /* Escape as much data as fits into rs->buf. */
10963 buf_len
= remote_escape_output
10964 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
10966 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
10967 || getpkt_sane (&rs
->buf
, 0) < 0
10968 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10969 return TARGET_XFER_E_IO
;
10971 unpack_varlen_hex (rs
->buf
.data (), &n
);
10974 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10977 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10978 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10979 number of bytes read is returned, or 0 for EOF, or -1 for error.
10980 The number of bytes read may be less than LEN without indicating an
10981 EOF. PACKET is checked and updated to indicate whether the remote
10982 target supports this object. */
10985 remote_target::remote_read_qxfer (const char *object_name
,
10987 gdb_byte
*readbuf
, ULONGEST offset
,
10989 ULONGEST
*xfered_len
,
10990 struct packet_config
*packet
)
10992 struct remote_state
*rs
= get_remote_state ();
10993 LONGEST i
, n
, packet_len
;
10995 if (packet_config_support (packet
) == PACKET_DISABLE
)
10996 return TARGET_XFER_E_IO
;
10998 /* Check whether we've cached an end-of-object packet that matches
11000 if (rs
->finished_object
)
11002 if (strcmp (object_name
, rs
->finished_object
) == 0
11003 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
11004 && offset
== rs
->finished_offset
)
11005 return TARGET_XFER_EOF
;
11008 /* Otherwise, we're now reading something different. Discard
11010 xfree (rs
->finished_object
);
11011 xfree (rs
->finished_annex
);
11012 rs
->finished_object
= NULL
;
11013 rs
->finished_annex
= NULL
;
11016 /* Request only enough to fit in a single packet. The actual data
11017 may not, since we don't know how much of it will need to be escaped;
11018 the target is free to respond with slightly less data. We subtract
11019 five to account for the response type and the protocol frame. */
11020 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
11021 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
11022 "qXfer:%s:read:%s:%s,%s",
11023 object_name
, annex
? annex
: "",
11024 phex_nz (offset
, sizeof offset
),
11025 phex_nz (n
, sizeof n
));
11026 i
= putpkt (rs
->buf
);
11028 return TARGET_XFER_E_IO
;
11031 packet_len
= getpkt_sane (&rs
->buf
, 0);
11032 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11033 return TARGET_XFER_E_IO
;
11035 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
11036 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
11038 /* 'm' means there is (or at least might be) more data after this
11039 batch. That does not make sense unless there's at least one byte
11040 of data in this reply. */
11041 if (rs
->buf
[0] == 'm' && packet_len
== 1)
11042 error (_("Remote qXfer reply contained no data."));
11044 /* Got some data. */
11045 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
11046 packet_len
- 1, readbuf
, n
);
11048 /* 'l' is an EOF marker, possibly including a final block of data,
11049 or possibly empty. If we have the final block of a non-empty
11050 object, record this fact to bypass a subsequent partial read. */
11051 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
11053 rs
->finished_object
= xstrdup (object_name
);
11054 rs
->finished_annex
= xstrdup (annex
? annex
: "");
11055 rs
->finished_offset
= offset
+ i
;
11059 return TARGET_XFER_EOF
;
11063 return TARGET_XFER_OK
;
11067 enum target_xfer_status
11068 remote_target::xfer_partial (enum target_object object
,
11069 const char *annex
, gdb_byte
*readbuf
,
11070 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
11071 ULONGEST
*xfered_len
)
11073 struct remote_state
*rs
;
11077 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
11079 set_remote_traceframe ();
11080 set_general_thread (inferior_ptid
);
11082 rs
= get_remote_state ();
11084 /* Handle memory using the standard memory routines. */
11085 if (object
== TARGET_OBJECT_MEMORY
)
11087 /* If the remote target is connected but not running, we should
11088 pass this request down to a lower stratum (e.g. the executable
11090 if (!target_has_execution ())
11091 return TARGET_XFER_EOF
;
11093 if (writebuf
!= NULL
)
11094 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
11097 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
11101 /* Handle extra signal info using qxfer packets. */
11102 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
11105 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
11106 xfered_len
, &remote_protocol_packets
11107 [PACKET_qXfer_siginfo_read
]);
11109 return remote_write_qxfer ("siginfo", annex
,
11110 writebuf
, offset
, len
, xfered_len
,
11111 &remote_protocol_packets
11112 [PACKET_qXfer_siginfo_write
]);
11115 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
11118 return remote_read_qxfer ("statictrace", annex
,
11119 readbuf
, offset
, len
, xfered_len
,
11120 &remote_protocol_packets
11121 [PACKET_qXfer_statictrace_read
]);
11123 return TARGET_XFER_E_IO
;
11126 /* Only handle flash writes. */
11127 if (writebuf
!= NULL
)
11131 case TARGET_OBJECT_FLASH
:
11132 return remote_flash_write (offset
, len
, xfered_len
,
11136 return TARGET_XFER_E_IO
;
11140 /* Map pre-existing objects onto letters. DO NOT do this for new
11141 objects!!! Instead specify new query packets. */
11144 case TARGET_OBJECT_AVR
:
11148 case TARGET_OBJECT_AUXV
:
11149 gdb_assert (annex
== NULL
);
11150 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
11152 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
11154 case TARGET_OBJECT_AVAILABLE_FEATURES
:
11155 return remote_read_qxfer
11156 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
11157 &remote_protocol_packets
[PACKET_qXfer_features
]);
11159 case TARGET_OBJECT_LIBRARIES
:
11160 return remote_read_qxfer
11161 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
11162 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
11164 case TARGET_OBJECT_LIBRARIES_SVR4
:
11165 return remote_read_qxfer
11166 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
11167 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
11169 case TARGET_OBJECT_MEMORY_MAP
:
11170 gdb_assert (annex
== NULL
);
11171 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
11173 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
11175 case TARGET_OBJECT_OSDATA
:
11176 /* Should only get here if we're connected. */
11177 gdb_assert (rs
->remote_desc
);
11178 return remote_read_qxfer
11179 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
11180 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
11182 case TARGET_OBJECT_THREADS
:
11183 gdb_assert (annex
== NULL
);
11184 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
11186 &remote_protocol_packets
[PACKET_qXfer_threads
]);
11188 case TARGET_OBJECT_TRACEFRAME_INFO
:
11189 gdb_assert (annex
== NULL
);
11190 return remote_read_qxfer
11191 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11192 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11194 case TARGET_OBJECT_FDPIC
:
11195 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11197 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11199 case TARGET_OBJECT_OPENVMS_UIB
:
11200 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11202 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11204 case TARGET_OBJECT_BTRACE
:
11205 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11207 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11209 case TARGET_OBJECT_BTRACE_CONF
:
11210 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11212 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11214 case TARGET_OBJECT_EXEC_FILE
:
11215 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11217 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11220 return TARGET_XFER_E_IO
;
11223 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11224 large enough let the caller deal with it. */
11225 if (len
< get_remote_packet_size ())
11226 return TARGET_XFER_E_IO
;
11227 len
= get_remote_packet_size ();
11229 /* Except for querying the minimum buffer size, target must be open. */
11230 if (!rs
->remote_desc
)
11231 error (_("remote query is only available after target open"));
11233 gdb_assert (annex
!= NULL
);
11234 gdb_assert (readbuf
!= NULL
);
11236 p2
= rs
->buf
.data ();
11238 *p2
++ = query_type
;
11240 /* We used one buffer char for the remote protocol q command and
11241 another for the query type. As the remote protocol encapsulation
11242 uses 4 chars plus one extra in case we are debugging
11243 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11246 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11248 /* Bad caller may have sent forbidden characters. */
11249 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11254 gdb_assert (annex
[i
] == '\0');
11256 i
= putpkt (rs
->buf
);
11258 return TARGET_XFER_E_IO
;
11260 getpkt (&rs
->buf
, 0);
11261 strcpy ((char *) readbuf
, rs
->buf
.data ());
11263 *xfered_len
= strlen ((char *) readbuf
);
11264 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11267 /* Implementation of to_get_memory_xfer_limit. */
11270 remote_target::get_memory_xfer_limit ()
11272 return get_memory_write_packet_size ();
11276 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11277 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11278 CORE_ADDR
*found_addrp
)
11280 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11281 struct remote_state
*rs
= get_remote_state ();
11282 int max_size
= get_memory_write_packet_size ();
11283 struct packet_config
*packet
=
11284 &remote_protocol_packets
[PACKET_qSearch_memory
];
11285 /* Number of packet bytes used to encode the pattern;
11286 this could be more than PATTERN_LEN due to escape characters. */
11287 int escaped_pattern_len
;
11288 /* Amount of pattern that was encodable in the packet. */
11289 int used_pattern_len
;
11292 ULONGEST found_addr
;
11294 auto read_memory
= [=] (CORE_ADDR addr
, gdb_byte
*result
, size_t len
)
11296 return (target_read (this, TARGET_OBJECT_MEMORY
, NULL
, result
, addr
, len
)
11300 /* Don't go to the target if we don't have to. This is done before
11301 checking packet_config_support to avoid the possibility that a
11302 success for this edge case means the facility works in
11304 if (pattern_len
> search_space_len
)
11306 if (pattern_len
== 0)
11308 *found_addrp
= start_addr
;
11312 /* If we already know the packet isn't supported, fall back to the simple
11313 way of searching memory. */
11315 if (packet_config_support (packet
) == PACKET_DISABLE
)
11317 /* Target doesn't provided special support, fall back and use the
11318 standard support (copy memory and do the search here). */
11319 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11320 pattern
, pattern_len
, found_addrp
);
11323 /* Make sure the remote is pointing at the right process. */
11324 set_general_process ();
11326 /* Insert header. */
11327 i
= snprintf (rs
->buf
.data (), max_size
,
11328 "qSearch:memory:%s;%s;",
11329 phex_nz (start_addr
, addr_size
),
11330 phex_nz (search_space_len
, sizeof (search_space_len
)));
11331 max_size
-= (i
+ 1);
11333 /* Escape as much data as fits into rs->buf. */
11334 escaped_pattern_len
=
11335 remote_escape_output (pattern
, pattern_len
, 1,
11336 (gdb_byte
*) rs
->buf
.data () + i
,
11337 &used_pattern_len
, max_size
);
11339 /* Bail if the pattern is too large. */
11340 if (used_pattern_len
!= pattern_len
)
11341 error (_("Pattern is too large to transmit to remote target."));
11343 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11344 || getpkt_sane (&rs
->buf
, 0) < 0
11345 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11347 /* The request may not have worked because the command is not
11348 supported. If so, fall back to the simple way. */
11349 if (packet_config_support (packet
) == PACKET_DISABLE
)
11351 return simple_search_memory (read_memory
, start_addr
, search_space_len
,
11352 pattern
, pattern_len
, found_addrp
);
11357 if (rs
->buf
[0] == '0')
11359 else if (rs
->buf
[0] == '1')
11362 if (rs
->buf
[1] != ',')
11363 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11364 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11365 *found_addrp
= found_addr
;
11368 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11374 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11376 struct remote_state
*rs
= get_remote_state ();
11377 char *p
= rs
->buf
.data ();
11379 if (!rs
->remote_desc
)
11380 error (_("remote rcmd is only available after target open"));
11382 /* Send a NULL command across as an empty command. */
11383 if (command
== NULL
)
11386 /* The query prefix. */
11387 strcpy (rs
->buf
.data (), "qRcmd,");
11388 p
= strchr (rs
->buf
.data (), '\0');
11390 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11391 > get_remote_packet_size ())
11392 error (_("\"monitor\" command ``%s'' is too long."), command
);
11394 /* Encode the actual command. */
11395 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11397 if (putpkt (rs
->buf
) < 0)
11398 error (_("Communication problem with target."));
11400 /* get/display the response */
11405 /* XXX - see also remote_get_noisy_reply(). */
11406 QUIT
; /* Allow user to bail out with ^C. */
11408 if (getpkt_sane (&rs
->buf
, 0) == -1)
11410 /* Timeout. Continue to (try to) read responses.
11411 This is better than stopping with an error, assuming the stub
11412 is still executing the (long) monitor command.
11413 If needed, the user can interrupt gdb using C-c, obtaining
11414 an effect similar to stop on timeout. */
11417 buf
= rs
->buf
.data ();
11418 if (buf
[0] == '\0')
11419 error (_("Target does not support this command."));
11420 if (buf
[0] == 'O' && buf
[1] != 'K')
11422 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11425 if (strcmp (buf
, "OK") == 0)
11427 if (strlen (buf
) == 3 && buf
[0] == 'E'
11428 && isdigit (buf
[1]) && isdigit (buf
[2]))
11430 error (_("Protocol error with Rcmd"));
11432 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11434 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11436 fputc_unfiltered (c
, outbuf
);
11442 std::vector
<mem_region
>
11443 remote_target::memory_map ()
11445 std::vector
<mem_region
> result
;
11446 gdb::optional
<gdb::char_vector
> text
11447 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP
, NULL
);
11450 result
= parse_memory_map (text
->data ());
11456 packet_command (const char *args
, int from_tty
)
11458 remote_target
*remote
= get_current_remote_target ();
11460 if (remote
== nullptr)
11461 error (_("command can only be used with remote target"));
11463 remote
->packet_command (args
, from_tty
);
11467 remote_target::packet_command (const char *args
, int from_tty
)
11470 error (_("remote-packet command requires packet text as argument"));
11472 puts_filtered ("sending: ");
11473 print_packet (args
);
11474 puts_filtered ("\n");
11477 remote_state
*rs
= get_remote_state ();
11479 getpkt (&rs
->buf
, 0);
11480 puts_filtered ("received: ");
11481 print_packet (rs
->buf
.data ());
11482 puts_filtered ("\n");
11486 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11488 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11490 static void threadset_test_cmd (char *cmd
, int tty
);
11492 static void threadalive_test (char *cmd
, int tty
);
11494 static void threadlist_test_cmd (char *cmd
, int tty
);
11496 int get_and_display_threadinfo (threadref
*ref
);
11498 static void threadinfo_test_cmd (char *cmd
, int tty
);
11500 static int thread_display_step (threadref
*ref
, void *context
);
11502 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11504 static void init_remote_threadtests (void);
11506 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11509 threadset_test_cmd (const char *cmd
, int tty
)
11511 int sample_thread
= SAMPLE_THREAD
;
11513 printf_filtered (_("Remote threadset test\n"));
11514 set_general_thread (sample_thread
);
11519 threadalive_test (const char *cmd
, int tty
)
11521 int sample_thread
= SAMPLE_THREAD
;
11522 int pid
= inferior_ptid
.pid ();
11523 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11525 if (remote_thread_alive (ptid
))
11526 printf_filtered ("PASS: Thread alive test\n");
11528 printf_filtered ("FAIL: Thread alive test\n");
11531 void output_threadid (char *title
, threadref
*ref
);
11534 output_threadid (char *title
, threadref
*ref
)
11538 pack_threadid (&hexid
[0], ref
); /* Convert thread id into hex. */
11540 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11544 threadlist_test_cmd (const char *cmd
, int tty
)
11547 threadref nextthread
;
11548 int done
, result_count
;
11549 threadref threadlist
[3];
11551 printf_filtered ("Remote Threadlist test\n");
11552 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11553 &result_count
, &threadlist
[0]))
11554 printf_filtered ("FAIL: threadlist test\n");
11557 threadref
*scan
= threadlist
;
11558 threadref
*limit
= scan
+ result_count
;
11560 while (scan
< limit
)
11561 output_threadid (" thread ", scan
++);
11566 display_thread_info (struct gdb_ext_thread_info
*info
)
11568 output_threadid ("Threadid: ", &info
->threadid
);
11569 printf_filtered ("Name: %s\n ", info
->shortname
);
11570 printf_filtered ("State: %s\n", info
->display
);
11571 printf_filtered ("other: %s\n\n", info
->more_display
);
11575 get_and_display_threadinfo (threadref
*ref
)
11579 struct gdb_ext_thread_info threadinfo
;
11581 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11582 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11583 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11584 display_thread_info (&threadinfo
);
11589 threadinfo_test_cmd (const char *cmd
, int tty
)
11591 int athread
= SAMPLE_THREAD
;
11595 int_to_threadref (&thread
, athread
);
11596 printf_filtered ("Remote Threadinfo test\n");
11597 if (!get_and_display_threadinfo (&thread
))
11598 printf_filtered ("FAIL cannot get thread info\n");
11602 thread_display_step (threadref
*ref
, void *context
)
11604 /* output_threadid(" threadstep ",ref); *//* simple test */
11605 return get_and_display_threadinfo (ref
);
11609 threadlist_update_test_cmd (const char *cmd
, int tty
)
11611 printf_filtered ("Remote Threadlist update test\n");
11612 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11616 init_remote_threadtests (void)
11618 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11619 _("Fetch and print the remote list of "
11620 "thread identifiers, one pkt only."));
11621 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11622 _("Fetch and display info about one thread."));
11623 add_com ("tset", class_obscure
, threadset_test_cmd
,
11624 _("Test setting to a different thread."));
11625 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11626 _("Iterate through updating all remote thread info."));
11627 add_com ("talive", class_obscure
, threadalive_test
,
11628 _("Remote thread alive test."));
11633 /* Convert a thread ID to a string. */
11636 remote_target::pid_to_str (ptid_t ptid
)
11638 struct remote_state
*rs
= get_remote_state ();
11640 if (ptid
== null_ptid
)
11641 return normal_pid_to_str (ptid
);
11642 else if (ptid
.is_pid ())
11644 /* Printing an inferior target id. */
11646 /* When multi-process extensions are off, there's no way in the
11647 remote protocol to know the remote process id, if there's any
11648 at all. There's one exception --- when we're connected with
11649 target extended-remote, and we manually attached to a process
11650 with "attach PID". We don't record anywhere a flag that
11651 allows us to distinguish that case from the case of
11652 connecting with extended-remote and the stub already being
11653 attached to a process, and reporting yes to qAttached, hence
11654 no smart special casing here. */
11655 if (!remote_multi_process_p (rs
))
11656 return "Remote target";
11658 return normal_pid_to_str (ptid
);
11662 if (magic_null_ptid
== ptid
)
11663 return "Thread <main>";
11664 else if (remote_multi_process_p (rs
))
11665 if (ptid
.lwp () == 0)
11666 return normal_pid_to_str (ptid
);
11668 return string_printf ("Thread %d.%ld",
11669 ptid
.pid (), ptid
.lwp ());
11671 return string_printf ("Thread %ld", ptid
.lwp ());
11675 /* Get the address of the thread local variable in OBJFILE which is
11676 stored at OFFSET within the thread local storage for thread PTID. */
11679 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11682 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11684 struct remote_state
*rs
= get_remote_state ();
11685 char *p
= rs
->buf
.data ();
11686 char *endp
= p
+ get_remote_packet_size ();
11687 enum packet_result result
;
11689 strcpy (p
, "qGetTLSAddr:");
11691 p
= write_ptid (p
, endp
, ptid
);
11693 p
+= hexnumstr (p
, offset
);
11695 p
+= hexnumstr (p
, lm
);
11699 getpkt (&rs
->buf
, 0);
11700 result
= packet_ok (rs
->buf
,
11701 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11702 if (result
== PACKET_OK
)
11706 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11709 else if (result
== PACKET_UNKNOWN
)
11710 throw_error (TLS_GENERIC_ERROR
,
11711 _("Remote target doesn't support qGetTLSAddr packet"));
11713 throw_error (TLS_GENERIC_ERROR
,
11714 _("Remote target failed to process qGetTLSAddr request"));
11717 throw_error (TLS_GENERIC_ERROR
,
11718 _("TLS not supported or disabled on this target"));
11723 /* Provide thread local base, i.e. Thread Information Block address.
11724 Returns 1 if ptid is found and thread_local_base is non zero. */
11727 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11729 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11731 struct remote_state
*rs
= get_remote_state ();
11732 char *p
= rs
->buf
.data ();
11733 char *endp
= p
+ get_remote_packet_size ();
11734 enum packet_result result
;
11736 strcpy (p
, "qGetTIBAddr:");
11738 p
= write_ptid (p
, endp
, ptid
);
11742 getpkt (&rs
->buf
, 0);
11743 result
= packet_ok (rs
->buf
,
11744 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11745 if (result
== PACKET_OK
)
11748 unpack_varlen_hex (rs
->buf
.data (), &val
);
11750 *addr
= (CORE_ADDR
) val
;
11753 else if (result
== PACKET_UNKNOWN
)
11754 error (_("Remote target doesn't support qGetTIBAddr packet"));
11756 error (_("Remote target failed to process qGetTIBAddr request"));
11759 error (_("qGetTIBAddr not supported or disabled on this target"));
11764 /* Support for inferring a target description based on the current
11765 architecture and the size of a 'g' packet. While the 'g' packet
11766 can have any size (since optional registers can be left off the
11767 end), some sizes are easily recognizable given knowledge of the
11768 approximate architecture. */
11770 struct remote_g_packet_guess
11772 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11779 const struct target_desc
*tdesc
;
11782 struct remote_g_packet_data
: public allocate_on_obstack
11784 std::vector
<remote_g_packet_guess
> guesses
;
11787 static struct gdbarch_data
*remote_g_packet_data_handle
;
11790 remote_g_packet_data_init (struct obstack
*obstack
)
11792 return new (obstack
) remote_g_packet_data
;
11796 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11797 const struct target_desc
*tdesc
)
11799 struct remote_g_packet_data
*data
11800 = ((struct remote_g_packet_data
*)
11801 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11803 gdb_assert (tdesc
!= NULL
);
11805 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11806 if (guess
.bytes
== bytes
)
11807 internal_error (__FILE__
, __LINE__
,
11808 _("Duplicate g packet description added for size %d"),
11811 data
->guesses
.emplace_back (bytes
, tdesc
);
11814 /* Return true if remote_read_description would do anything on this target
11815 and architecture, false otherwise. */
11818 remote_read_description_p (struct target_ops
*target
)
11820 struct remote_g_packet_data
*data
11821 = ((struct remote_g_packet_data
*)
11822 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11824 return !data
->guesses
.empty ();
11827 const struct target_desc
*
11828 remote_target::read_description ()
11830 struct remote_g_packet_data
*data
11831 = ((struct remote_g_packet_data
*)
11832 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11834 /* Do not try this during initial connection, when we do not know
11835 whether there is a running but stopped thread. */
11836 if (!target_has_execution () || inferior_ptid
== null_ptid
)
11837 return beneath ()->read_description ();
11839 if (!data
->guesses
.empty ())
11841 int bytes
= send_g_packet ();
11843 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11844 if (guess
.bytes
== bytes
)
11845 return guess
.tdesc
;
11847 /* We discard the g packet. A minor optimization would be to
11848 hold on to it, and fill the register cache once we have selected
11849 an architecture, but it's too tricky to do safely. */
11852 return beneath ()->read_description ();
11855 /* Remote file transfer support. This is host-initiated I/O, not
11856 target-initiated; for target-initiated, see remote-fileio.c. */
11858 /* If *LEFT is at least the length of STRING, copy STRING to
11859 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11860 decrease *LEFT. Otherwise raise an error. */
11863 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11865 int len
= strlen (string
);
11868 error (_("Packet too long for target."));
11870 memcpy (*buffer
, string
, len
);
11874 /* NUL-terminate the buffer as a convenience, if there is
11880 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11881 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11882 decrease *LEFT. Otherwise raise an error. */
11885 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11888 if (2 * len
> *left
)
11889 error (_("Packet too long for target."));
11891 bin2hex (bytes
, *buffer
, len
);
11892 *buffer
+= 2 * len
;
11895 /* NUL-terminate the buffer as a convenience, if there is
11901 /* If *LEFT is large enough, convert VALUE to hex and add it to
11902 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11903 decrease *LEFT. Otherwise raise an error. */
11906 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11908 int len
= hexnumlen (value
);
11911 error (_("Packet too long for target."));
11913 hexnumstr (*buffer
, value
);
11917 /* NUL-terminate the buffer as a convenience, if there is
11923 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11924 value, *REMOTE_ERRNO to the remote error number or zero if none
11925 was included, and *ATTACHMENT to point to the start of the annex
11926 if any. The length of the packet isn't needed here; there may
11927 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11929 Return 0 if the packet could be parsed, -1 if it could not. If
11930 -1 is returned, the other variables may not be initialized. */
11933 remote_hostio_parse_result (const char *buffer
, int *retcode
,
11934 int *remote_errno
, const char **attachment
)
11939 *attachment
= NULL
;
11941 if (buffer
[0] != 'F')
11945 *retcode
= strtol (&buffer
[1], &p
, 16);
11946 if (errno
!= 0 || p
== &buffer
[1])
11949 /* Check for ",errno". */
11953 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11954 if (errno
!= 0 || p
+ 1 == p2
)
11959 /* Check for ";attachment". If there is no attachment, the
11960 packet should end here. */
11963 *attachment
= p
+ 1;
11966 else if (*p
== '\0')
11972 /* Send a prepared I/O packet to the target and read its response.
11973 The prepared packet is in the global RS->BUF before this function
11974 is called, and the answer is there when we return.
11976 COMMAND_BYTES is the length of the request to send, which may include
11977 binary data. WHICH_PACKET is the packet configuration to check
11978 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11979 is set to the error number and -1 is returned. Otherwise the value
11980 returned by the function is returned.
11982 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11983 attachment is expected; an error will be reported if there's a
11984 mismatch. If one is found, *ATTACHMENT will be set to point into
11985 the packet buffer and *ATTACHMENT_LEN will be set to the
11986 attachment's length. */
11989 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
11990 int *remote_errno
, const char **attachment
,
11991 int *attachment_len
)
11993 struct remote_state
*rs
= get_remote_state ();
11994 int ret
, bytes_read
;
11995 const char *attachment_tmp
;
11997 if (packet_support (which_packet
) == PACKET_DISABLE
)
11999 *remote_errno
= FILEIO_ENOSYS
;
12003 putpkt_binary (rs
->buf
.data (), command_bytes
);
12004 bytes_read
= getpkt_sane (&rs
->buf
, 0);
12006 /* If it timed out, something is wrong. Don't try to parse the
12008 if (bytes_read
< 0)
12010 *remote_errno
= FILEIO_EINVAL
;
12014 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
12017 *remote_errno
= FILEIO_EINVAL
;
12019 case PACKET_UNKNOWN
:
12020 *remote_errno
= FILEIO_ENOSYS
;
12026 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
12029 *remote_errno
= FILEIO_EINVAL
;
12033 /* Make sure we saw an attachment if and only if we expected one. */
12034 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
12035 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
12037 *remote_errno
= FILEIO_EINVAL
;
12041 /* If an attachment was found, it must point into the packet buffer;
12042 work out how many bytes there were. */
12043 if (attachment_tmp
!= NULL
)
12045 *attachment
= attachment_tmp
;
12046 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
12052 /* See declaration.h. */
12055 readahead_cache::invalidate ()
12060 /* See declaration.h. */
12063 readahead_cache::invalidate_fd (int fd
)
12065 if (this->fd
== fd
)
12069 /* Set the filesystem remote_hostio functions that take FILENAME
12070 arguments will use. Return 0 on success, or -1 if an error
12071 occurs (and set *REMOTE_ERRNO). */
12074 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
12077 struct remote_state
*rs
= get_remote_state ();
12078 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
12079 char *p
= rs
->buf
.data ();
12080 int left
= get_remote_packet_size () - 1;
12084 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12087 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
12090 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
12092 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
12093 remote_buffer_add_string (&p
, &left
, arg
);
12095 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
12096 remote_errno
, NULL
, NULL
);
12098 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
12102 rs
->fs_pid
= required_pid
;
12107 /* Implementation of to_fileio_open. */
12110 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
12111 int flags
, int mode
, int warn_if_slow
,
12114 struct remote_state
*rs
= get_remote_state ();
12115 char *p
= rs
->buf
.data ();
12116 int left
= get_remote_packet_size () - 1;
12120 static int warning_issued
= 0;
12122 printf_unfiltered (_("Reading %s from remote target...\n"),
12125 if (!warning_issued
)
12127 warning (_("File transfers from remote targets can be slow."
12128 " Use \"set sysroot\" to access files locally"
12130 warning_issued
= 1;
12134 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12137 remote_buffer_add_string (&p
, &left
, "vFile:open:");
12139 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12140 strlen (filename
));
12141 remote_buffer_add_string (&p
, &left
, ",");
12143 remote_buffer_add_int (&p
, &left
, flags
);
12144 remote_buffer_add_string (&p
, &left
, ",");
12146 remote_buffer_add_int (&p
, &left
, mode
);
12148 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
12149 remote_errno
, NULL
, NULL
);
12153 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
12154 int flags
, int mode
, int warn_if_slow
,
12157 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
12161 /* Implementation of to_fileio_pwrite. */
12164 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12165 ULONGEST offset
, int *remote_errno
)
12167 struct remote_state
*rs
= get_remote_state ();
12168 char *p
= rs
->buf
.data ();
12169 int left
= get_remote_packet_size ();
12172 rs
->readahead_cache
.invalidate_fd (fd
);
12174 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
12176 remote_buffer_add_int (&p
, &left
, fd
);
12177 remote_buffer_add_string (&p
, &left
, ",");
12179 remote_buffer_add_int (&p
, &left
, offset
);
12180 remote_buffer_add_string (&p
, &left
, ",");
12182 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
12183 (get_remote_packet_size ()
12184 - (p
- rs
->buf
.data ())));
12186 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
12187 remote_errno
, NULL
, NULL
);
12191 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12192 ULONGEST offset
, int *remote_errno
)
12194 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12197 /* Helper for the implementation of to_fileio_pread. Read the file
12198 from the remote side with vFile:pread. */
12201 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12202 ULONGEST offset
, int *remote_errno
)
12204 struct remote_state
*rs
= get_remote_state ();
12205 char *p
= rs
->buf
.data ();
12206 const char *attachment
;
12207 int left
= get_remote_packet_size ();
12208 int ret
, attachment_len
;
12211 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12213 remote_buffer_add_int (&p
, &left
, fd
);
12214 remote_buffer_add_string (&p
, &left
, ",");
12216 remote_buffer_add_int (&p
, &left
, len
);
12217 remote_buffer_add_string (&p
, &left
, ",");
12219 remote_buffer_add_int (&p
, &left
, offset
);
12221 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
12222 remote_errno
, &attachment
,
12228 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12230 if (read_len
!= ret
)
12231 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12236 /* See declaration.h. */
12239 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12243 && this->offset
<= offset
12244 && offset
< this->offset
+ this->bufsize
)
12246 ULONGEST max
= this->offset
+ this->bufsize
;
12248 if (offset
+ len
> max
)
12249 len
= max
- offset
;
12251 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12258 /* Implementation of to_fileio_pread. */
12261 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12262 ULONGEST offset
, int *remote_errno
)
12265 struct remote_state
*rs
= get_remote_state ();
12266 readahead_cache
*cache
= &rs
->readahead_cache
;
12268 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12271 cache
->hit_count
++;
12273 remote_debug_printf ("readahead cache hit %s",
12274 pulongest (cache
->hit_count
));
12278 cache
->miss_count
++;
12280 remote_debug_printf ("readahead cache miss %s",
12281 pulongest (cache
->miss_count
));
12284 cache
->offset
= offset
;
12285 cache
->bufsize
= get_remote_packet_size ();
12286 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12288 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12289 cache
->offset
, remote_errno
);
12292 cache
->invalidate_fd (fd
);
12296 cache
->bufsize
= ret
;
12297 return cache
->pread (fd
, read_buf
, len
, offset
);
12301 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12302 ULONGEST offset
, int *remote_errno
)
12304 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12307 /* Implementation of to_fileio_close. */
12310 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12312 struct remote_state
*rs
= get_remote_state ();
12313 char *p
= rs
->buf
.data ();
12314 int left
= get_remote_packet_size () - 1;
12316 rs
->readahead_cache
.invalidate_fd (fd
);
12318 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12320 remote_buffer_add_int (&p
, &left
, fd
);
12322 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12323 remote_errno
, NULL
, NULL
);
12327 remote_target::fileio_close (int fd
, int *remote_errno
)
12329 return remote_hostio_close (fd
, remote_errno
);
12332 /* Implementation of to_fileio_unlink. */
12335 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12338 struct remote_state
*rs
= get_remote_state ();
12339 char *p
= rs
->buf
.data ();
12340 int left
= get_remote_packet_size () - 1;
12342 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12345 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12347 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12348 strlen (filename
));
12350 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12351 remote_errno
, NULL
, NULL
);
12355 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12358 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12361 /* Implementation of to_fileio_readlink. */
12363 gdb::optional
<std::string
>
12364 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12367 struct remote_state
*rs
= get_remote_state ();
12368 char *p
= rs
->buf
.data ();
12369 const char *attachment
;
12370 int left
= get_remote_packet_size ();
12371 int len
, attachment_len
;
12374 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12377 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12379 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12380 strlen (filename
));
12382 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12383 remote_errno
, &attachment
,
12389 std::string
ret (len
, '\0');
12391 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12392 (gdb_byte
*) &ret
[0], len
);
12393 if (read_len
!= len
)
12394 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12399 /* Implementation of to_fileio_fstat. */
12402 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12404 struct remote_state
*rs
= get_remote_state ();
12405 char *p
= rs
->buf
.data ();
12406 int left
= get_remote_packet_size ();
12407 int attachment_len
, ret
;
12408 const char *attachment
;
12409 struct fio_stat fst
;
12412 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12414 remote_buffer_add_int (&p
, &left
, fd
);
12416 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12417 remote_errno
, &attachment
,
12421 if (*remote_errno
!= FILEIO_ENOSYS
)
12424 /* Strictly we should return -1, ENOSYS here, but when
12425 "set sysroot remote:" was implemented in August 2008
12426 BFD's need for a stat function was sidestepped with
12427 this hack. This was not remedied until March 2015
12428 so we retain the previous behavior to avoid breaking
12431 Note that the memset is a March 2015 addition; older
12432 GDBs set st_size *and nothing else* so the structure
12433 would have garbage in all other fields. This might
12434 break something but retaining the previous behavior
12435 here would be just too wrong. */
12437 memset (st
, 0, sizeof (struct stat
));
12438 st
->st_size
= INT_MAX
;
12442 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12443 (gdb_byte
*) &fst
, sizeof (fst
));
12445 if (read_len
!= ret
)
12446 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12448 if (read_len
!= sizeof (fst
))
12449 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12450 read_len
, (int) sizeof (fst
));
12452 remote_fileio_to_host_stat (&fst
, st
);
12457 /* Implementation of to_filesystem_is_local. */
12460 remote_target::filesystem_is_local ()
12462 /* Valgrind GDB presents itself as a remote target but works
12463 on the local filesystem: it does not implement remote get
12464 and users are not expected to set a sysroot. To handle
12465 this case we treat the remote filesystem as local if the
12466 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12467 does not support vFile:open. */
12468 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12470 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12472 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12474 int fd
, remote_errno
;
12476 /* Try opening a file to probe support. The supplied
12477 filename is irrelevant, we only care about whether
12478 the stub recognizes the packet or not. */
12479 fd
= remote_hostio_open (NULL
, "just probing",
12480 FILEIO_O_RDONLY
, 0700, 0,
12484 remote_hostio_close (fd
, &remote_errno
);
12486 ps
= packet_support (PACKET_vFile_open
);
12489 if (ps
== PACKET_DISABLE
)
12491 static int warning_issued
= 0;
12493 if (!warning_issued
)
12495 warning (_("remote target does not support file"
12496 " transfer, attempting to access files"
12497 " from local filesystem."));
12498 warning_issued
= 1;
12509 remote_fileio_errno_to_host (int errnum
)
12515 case FILEIO_ENOENT
:
12523 case FILEIO_EACCES
:
12525 case FILEIO_EFAULT
:
12529 case FILEIO_EEXIST
:
12531 case FILEIO_ENODEV
:
12533 case FILEIO_ENOTDIR
:
12535 case FILEIO_EISDIR
:
12537 case FILEIO_EINVAL
:
12539 case FILEIO_ENFILE
:
12541 case FILEIO_EMFILE
:
12545 case FILEIO_ENOSPC
:
12547 case FILEIO_ESPIPE
:
12551 case FILEIO_ENOSYS
:
12553 case FILEIO_ENAMETOOLONG
:
12554 return ENAMETOOLONG
;
12560 remote_hostio_error (int errnum
)
12562 int host_error
= remote_fileio_errno_to_host (errnum
);
12564 if (host_error
== -1)
12565 error (_("Unknown remote I/O error %d"), errnum
);
12567 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12570 /* A RAII wrapper around a remote file descriptor. */
12572 class scoped_remote_fd
12575 scoped_remote_fd (remote_target
*remote
, int fd
)
12576 : m_remote (remote
), m_fd (fd
)
12580 ~scoped_remote_fd ()
12587 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12591 /* Swallow exception before it escapes the dtor. If
12592 something goes wrong, likely the connection is gone,
12593 and there's nothing else that can be done. */
12598 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12600 /* Release ownership of the file descriptor, and return it. */
12601 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12608 /* Return the owned file descriptor. */
12609 int get () const noexcept
12615 /* The remote target. */
12616 remote_target
*m_remote
;
12618 /* The owned remote I/O file descriptor. */
12623 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12625 remote_target
*remote
= get_current_remote_target ();
12627 if (remote
== nullptr)
12628 error (_("command can only be used with remote target"));
12630 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12634 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12637 int retcode
, remote_errno
, bytes
, io_size
;
12638 int bytes_in_buffer
;
12642 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12644 perror_with_name (local_file
);
12646 scoped_remote_fd fd
12647 (this, remote_hostio_open (NULL
,
12648 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12650 0700, 0, &remote_errno
));
12651 if (fd
.get () == -1)
12652 remote_hostio_error (remote_errno
);
12654 /* Send up to this many bytes at once. They won't all fit in the
12655 remote packet limit, so we'll transfer slightly fewer. */
12656 io_size
= get_remote_packet_size ();
12657 gdb::byte_vector
buffer (io_size
);
12659 bytes_in_buffer
= 0;
12662 while (bytes_in_buffer
|| !saw_eof
)
12666 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12667 io_size
- bytes_in_buffer
,
12671 if (ferror (file
.get ()))
12672 error (_("Error reading %s."), local_file
);
12675 /* EOF. Unless there is something still in the
12676 buffer from the last iteration, we are done. */
12678 if (bytes_in_buffer
== 0)
12686 bytes
+= bytes_in_buffer
;
12687 bytes_in_buffer
= 0;
12689 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12690 offset
, &remote_errno
);
12693 remote_hostio_error (remote_errno
);
12694 else if (retcode
== 0)
12695 error (_("Remote write of %d bytes returned 0!"), bytes
);
12696 else if (retcode
< bytes
)
12698 /* Short write. Save the rest of the read data for the next
12700 bytes_in_buffer
= bytes
- retcode
;
12701 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12707 if (remote_hostio_close (fd
.release (), &remote_errno
))
12708 remote_hostio_error (remote_errno
);
12711 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12715 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12717 remote_target
*remote
= get_current_remote_target ();
12719 if (remote
== nullptr)
12720 error (_("command can only be used with remote target"));
12722 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12726 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12729 int remote_errno
, bytes
, io_size
;
12732 scoped_remote_fd fd
12733 (this, remote_hostio_open (NULL
,
12734 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12736 if (fd
.get () == -1)
12737 remote_hostio_error (remote_errno
);
12739 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12741 perror_with_name (local_file
);
12743 /* Send up to this many bytes at once. They won't all fit in the
12744 remote packet limit, so we'll transfer slightly fewer. */
12745 io_size
= get_remote_packet_size ();
12746 gdb::byte_vector
buffer (io_size
);
12751 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12754 /* Success, but no bytes, means end-of-file. */
12757 remote_hostio_error (remote_errno
);
12761 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12763 perror_with_name (local_file
);
12766 if (remote_hostio_close (fd
.release (), &remote_errno
))
12767 remote_hostio_error (remote_errno
);
12770 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12774 remote_file_delete (const char *remote_file
, int from_tty
)
12776 remote_target
*remote
= get_current_remote_target ();
12778 if (remote
== nullptr)
12779 error (_("command can only be used with remote target"));
12781 remote
->remote_file_delete (remote_file
, from_tty
);
12785 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12787 int retcode
, remote_errno
;
12789 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12791 remote_hostio_error (remote_errno
);
12794 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12798 remote_put_command (const char *args
, int from_tty
)
12801 error_no_arg (_("file to put"));
12803 gdb_argv
argv (args
);
12804 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12805 error (_("Invalid parameters to remote put"));
12807 remote_file_put (argv
[0], argv
[1], from_tty
);
12811 remote_get_command (const char *args
, int from_tty
)
12814 error_no_arg (_("file to get"));
12816 gdb_argv
argv (args
);
12817 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12818 error (_("Invalid parameters to remote get"));
12820 remote_file_get (argv
[0], argv
[1], from_tty
);
12824 remote_delete_command (const char *args
, int from_tty
)
12827 error_no_arg (_("file to delete"));
12829 gdb_argv
argv (args
);
12830 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12831 error (_("Invalid parameters to remote delete"));
12833 remote_file_delete (argv
[0], from_tty
);
12837 remote_target::can_execute_reverse ()
12839 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12840 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12847 remote_target::supports_non_stop ()
12853 remote_target::supports_disable_randomization ()
12855 /* Only supported in extended mode. */
12860 remote_target::supports_multi_process ()
12862 struct remote_state
*rs
= get_remote_state ();
12864 return remote_multi_process_p (rs
);
12868 remote_supports_cond_tracepoints ()
12870 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12874 remote_target::supports_evaluation_of_breakpoint_conditions ()
12876 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12880 remote_supports_fast_tracepoints ()
12882 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12886 remote_supports_static_tracepoints ()
12888 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12892 remote_supports_install_in_trace ()
12894 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12898 remote_target::supports_enable_disable_tracepoint ()
12900 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12905 remote_target::supports_string_tracing ()
12907 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12911 remote_target::can_run_breakpoint_commands ()
12913 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12917 remote_target::trace_init ()
12919 struct remote_state
*rs
= get_remote_state ();
12922 remote_get_noisy_reply ();
12923 if (strcmp (rs
->buf
.data (), "OK") != 0)
12924 error (_("Target does not support this command."));
12927 /* Recursive routine to walk through command list including loops, and
12928 download packets for each command. */
12931 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
12932 struct command_line
*cmds
)
12934 struct remote_state
*rs
= get_remote_state ();
12935 struct command_line
*cmd
;
12937 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12939 QUIT
; /* Allow user to bail out with ^C. */
12940 strcpy (rs
->buf
.data (), "QTDPsrc:");
12941 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12942 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12943 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12945 remote_get_noisy_reply ();
12946 if (strcmp (rs
->buf
.data (), "OK"))
12947 warning (_("Target does not support source download."));
12949 if (cmd
->control_type
== while_control
12950 || cmd
->control_type
== while_stepping_control
)
12952 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
12954 QUIT
; /* Allow user to bail out with ^C. */
12955 strcpy (rs
->buf
.data (), "QTDPsrc:");
12956 encode_source_string (num
, addr
, "cmd", "end",
12957 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12958 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12960 remote_get_noisy_reply ();
12961 if (strcmp (rs
->buf
.data (), "OK"))
12962 warning (_("Target does not support source download."));
12968 remote_target::download_tracepoint (struct bp_location
*loc
)
12972 std::vector
<std::string
> tdp_actions
;
12973 std::vector
<std::string
> stepping_actions
;
12975 struct breakpoint
*b
= loc
->owner
;
12976 struct tracepoint
*t
= (struct tracepoint
*) b
;
12977 struct remote_state
*rs
= get_remote_state ();
12979 const char *err_msg
= _("Tracepoint packet too large for target.");
12982 /* We use a buffer other than rs->buf because we'll build strings
12983 across multiple statements, and other statements in between could
12985 gdb::char_vector
buf (get_remote_packet_size ());
12987 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12989 tpaddr
= loc
->address
;
12990 strcpy (addrbuf
, phex (tpaddr
, sizeof (CORE_ADDR
)));
12991 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
12992 b
->number
, addrbuf
, /* address */
12993 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12994 t
->step_count
, t
->pass_count
);
12996 if (ret
< 0 || ret
>= buf
.size ())
12997 error ("%s", err_msg
);
12999 /* Fast tracepoints are mostly handled by the target, but we can
13000 tell the target how big of an instruction block should be moved
13002 if (b
->type
== bp_fast_tracepoint
)
13004 /* Only test for support at download time; we may not know
13005 target capabilities at definition time. */
13006 if (remote_supports_fast_tracepoints ())
13008 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
13011 size_left
= buf
.size () - strlen (buf
.data ());
13012 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13014 gdb_insn_length (loc
->gdbarch
, tpaddr
));
13016 if (ret
< 0 || ret
>= size_left
)
13017 error ("%s", err_msg
);
13020 /* If it passed validation at definition but fails now,
13021 something is very wrong. */
13022 internal_error (__FILE__
, __LINE__
,
13023 _("Fast tracepoint not "
13024 "valid during download"));
13027 /* Fast tracepoints are functionally identical to regular
13028 tracepoints, so don't take lack of support as a reason to
13029 give up on the trace run. */
13030 warning (_("Target does not support fast tracepoints, "
13031 "downloading %d as regular tracepoint"), b
->number
);
13033 else if (b
->type
== bp_static_tracepoint
)
13035 /* Only test for support at download time; we may not know
13036 target capabilities at definition time. */
13037 if (remote_supports_static_tracepoints ())
13039 struct static_tracepoint_marker marker
;
13041 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
13043 size_left
= buf
.size () - strlen (buf
.data ());
13044 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13047 if (ret
< 0 || ret
>= size_left
)
13048 error ("%s", err_msg
);
13051 error (_("Static tracepoint not valid during download"));
13054 /* Fast tracepoints are functionally identical to regular
13055 tracepoints, so don't take lack of support as a reason
13056 to give up on the trace run. */
13057 error (_("Target does not support static tracepoints"));
13059 /* If the tracepoint has a conditional, make it into an agent
13060 expression and append to the definition. */
13063 /* Only test support at download time, we may not know target
13064 capabilities at definition time. */
13065 if (remote_supports_cond_tracepoints ())
13067 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
13070 size_left
= buf
.size () - strlen (buf
.data ());
13072 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13073 size_left
, ":X%x,", aexpr
->len
);
13075 if (ret
< 0 || ret
>= size_left
)
13076 error ("%s", err_msg
);
13078 size_left
= buf
.size () - strlen (buf
.data ());
13080 /* Two bytes to encode each aexpr byte, plus the terminating
13082 if (aexpr
->len
* 2 + 1 > size_left
)
13083 error ("%s", err_msg
);
13085 pkt
= buf
.data () + strlen (buf
.data ());
13087 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
13088 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
13092 warning (_("Target does not support conditional tracepoints, "
13093 "ignoring tp %d cond"), b
->number
);
13096 if (b
->commands
|| *default_collect
)
13098 size_left
= buf
.size () - strlen (buf
.data ());
13100 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
13103 if (ret
< 0 || ret
>= size_left
)
13104 error ("%s", err_msg
);
13107 putpkt (buf
.data ());
13108 remote_get_noisy_reply ();
13109 if (strcmp (rs
->buf
.data (), "OK"))
13110 error (_("Target does not support tracepoints."));
13112 /* do_single_steps (t); */
13113 for (auto action_it
= tdp_actions
.begin ();
13114 action_it
!= tdp_actions
.end (); action_it
++)
13116 QUIT
; /* Allow user to bail out with ^C. */
13118 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
13119 || !stepping_actions
.empty ());
13121 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
13122 b
->number
, addrbuf
, /* address */
13123 action_it
->c_str (),
13124 has_more
? '-' : 0);
13126 if (ret
< 0 || ret
>= buf
.size ())
13127 error ("%s", err_msg
);
13129 putpkt (buf
.data ());
13130 remote_get_noisy_reply ();
13131 if (strcmp (rs
->buf
.data (), "OK"))
13132 error (_("Error on target while setting tracepoints."));
13135 for (auto action_it
= stepping_actions
.begin ();
13136 action_it
!= stepping_actions
.end (); action_it
++)
13138 QUIT
; /* Allow user to bail out with ^C. */
13140 bool is_first
= action_it
== stepping_actions
.begin ();
13141 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
13143 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
13144 b
->number
, addrbuf
, /* address */
13145 is_first
? "S" : "",
13146 action_it
->c_str (),
13147 has_more
? "-" : "");
13149 if (ret
< 0 || ret
>= buf
.size ())
13150 error ("%s", err_msg
);
13152 putpkt (buf
.data ());
13153 remote_get_noisy_reply ();
13154 if (strcmp (rs
->buf
.data (), "OK"))
13155 error (_("Error on target while setting tracepoints."));
13158 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
13160 if (b
->location
!= NULL
)
13162 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13164 if (ret
< 0 || ret
>= buf
.size ())
13165 error ("%s", err_msg
);
13167 encode_source_string (b
->number
, loc
->address
, "at",
13168 event_location_to_string (b
->location
.get ()),
13169 buf
.data () + strlen (buf
.data ()),
13170 buf
.size () - strlen (buf
.data ()));
13171 putpkt (buf
.data ());
13172 remote_get_noisy_reply ();
13173 if (strcmp (rs
->buf
.data (), "OK"))
13174 warning (_("Target does not support source download."));
13176 if (b
->cond_string
)
13178 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13180 if (ret
< 0 || ret
>= buf
.size ())
13181 error ("%s", err_msg
);
13183 encode_source_string (b
->number
, loc
->address
,
13184 "cond", b
->cond_string
,
13185 buf
.data () + strlen (buf
.data ()),
13186 buf
.size () - strlen (buf
.data ()));
13187 putpkt (buf
.data ());
13188 remote_get_noisy_reply ();
13189 if (strcmp (rs
->buf
.data (), "OK"))
13190 warning (_("Target does not support source download."));
13192 remote_download_command_source (b
->number
, loc
->address
,
13193 breakpoint_commands (b
));
13198 remote_target::can_download_tracepoint ()
13200 struct remote_state
*rs
= get_remote_state ();
13201 struct trace_status
*ts
;
13204 /* Don't try to install tracepoints until we've relocated our
13205 symbols, and fetched and merged the target's tracepoint list with
13207 if (rs
->starting_up
)
13210 ts
= current_trace_status ();
13211 status
= get_trace_status (ts
);
13213 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13216 /* If we are in a tracing experiment, but remote stub doesn't support
13217 installing tracepoint in trace, we have to return. */
13218 if (!remote_supports_install_in_trace ())
13226 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13228 struct remote_state
*rs
= get_remote_state ();
13231 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13232 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13234 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13235 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13236 >= get_remote_packet_size ())
13237 error (_("Trace state variable name too long for tsv definition packet"));
13238 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13241 remote_get_noisy_reply ();
13242 if (rs
->buf
[0] == '\0')
13243 error (_("Target does not support this command."));
13244 if (strcmp (rs
->buf
.data (), "OK") != 0)
13245 error (_("Error on target while downloading trace state variable."));
13249 remote_target::enable_tracepoint (struct bp_location
*location
)
13251 struct remote_state
*rs
= get_remote_state ();
13253 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13254 location
->owner
->number
,
13255 phex (location
->address
, sizeof (CORE_ADDR
)));
13257 remote_get_noisy_reply ();
13258 if (rs
->buf
[0] == '\0')
13259 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13260 if (strcmp (rs
->buf
.data (), "OK") != 0)
13261 error (_("Error on target while enabling tracepoint."));
13265 remote_target::disable_tracepoint (struct bp_location
*location
)
13267 struct remote_state
*rs
= get_remote_state ();
13269 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13270 location
->owner
->number
,
13271 phex (location
->address
, sizeof (CORE_ADDR
)));
13273 remote_get_noisy_reply ();
13274 if (rs
->buf
[0] == '\0')
13275 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13276 if (strcmp (rs
->buf
.data (), "OK") != 0)
13277 error (_("Error on target while disabling tracepoint."));
13281 remote_target::trace_set_readonly_regions ()
13284 bfd_size_type size
;
13289 if (!current_program_space
->exec_bfd ())
13290 return; /* No information to give. */
13292 struct remote_state
*rs
= get_remote_state ();
13294 strcpy (rs
->buf
.data (), "QTro");
13295 offset
= strlen (rs
->buf
.data ());
13296 for (s
= current_program_space
->exec_bfd ()->sections
; s
; s
= s
->next
)
13298 char tmp1
[40], tmp2
[40];
13301 if ((s
->flags
& SEC_LOAD
) == 0 ||
13302 /* (s->flags & SEC_CODE) == 0 || */
13303 (s
->flags
& SEC_READONLY
) == 0)
13307 vma
= bfd_section_vma (s
);
13308 size
= bfd_section_size (s
);
13309 sprintf_vma (tmp1
, vma
);
13310 sprintf_vma (tmp2
, vma
+ size
);
13311 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13312 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13314 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13316 Too many sections for read-only sections definition packet."));
13319 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13321 offset
+= sec_length
;
13326 getpkt (&rs
->buf
, 0);
13331 remote_target::trace_start ()
13333 struct remote_state
*rs
= get_remote_state ();
13335 putpkt ("QTStart");
13336 remote_get_noisy_reply ();
13337 if (rs
->buf
[0] == '\0')
13338 error (_("Target does not support this command."));
13339 if (strcmp (rs
->buf
.data (), "OK") != 0)
13340 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13344 remote_target::get_trace_status (struct trace_status
*ts
)
13346 /* Initialize it just to avoid a GCC false warning. */
13348 enum packet_result result
;
13349 struct remote_state
*rs
= get_remote_state ();
13351 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13354 /* FIXME we need to get register block size some other way. */
13355 trace_regblock_size
13356 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13358 putpkt ("qTStatus");
13362 p
= remote_get_noisy_reply ();
13364 catch (const gdb_exception_error
&ex
)
13366 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13368 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13374 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13376 /* If the remote target doesn't do tracing, flag it. */
13377 if (result
== PACKET_UNKNOWN
)
13380 /* We're working with a live target. */
13381 ts
->filename
= NULL
;
13384 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13386 /* Function 'parse_trace_status' sets default value of each field of
13387 'ts' at first, so we don't have to do it here. */
13388 parse_trace_status (p
, ts
);
13390 return ts
->running
;
13394 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13395 struct uploaded_tp
*utp
)
13397 struct remote_state
*rs
= get_remote_state ();
13399 struct bp_location
*loc
;
13400 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13401 size_t size
= get_remote_packet_size ();
13406 tp
->traceframe_usage
= 0;
13407 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
13409 /* If the tracepoint was never downloaded, don't go asking for
13411 if (tp
->number_on_target
== 0)
13413 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13414 phex_nz (loc
->address
, 0));
13416 reply
= remote_get_noisy_reply ();
13417 if (reply
&& *reply
)
13420 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13426 utp
->hit_count
= 0;
13427 utp
->traceframe_usage
= 0;
13428 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13429 phex_nz (utp
->addr
, 0));
13431 reply
= remote_get_noisy_reply ();
13432 if (reply
&& *reply
)
13435 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13441 remote_target::trace_stop ()
13443 struct remote_state
*rs
= get_remote_state ();
13446 remote_get_noisy_reply ();
13447 if (rs
->buf
[0] == '\0')
13448 error (_("Target does not support this command."));
13449 if (strcmp (rs
->buf
.data (), "OK") != 0)
13450 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13454 remote_target::trace_find (enum trace_find_type type
, int num
,
13455 CORE_ADDR addr1
, CORE_ADDR addr2
,
13458 struct remote_state
*rs
= get_remote_state ();
13459 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13461 int target_frameno
= -1, target_tracept
= -1;
13463 /* Lookups other than by absolute frame number depend on the current
13464 trace selected, so make sure it is correct on the remote end
13466 if (type
!= tfind_number
)
13467 set_remote_traceframe ();
13469 p
= rs
->buf
.data ();
13470 strcpy (p
, "QTFrame:");
13471 p
= strchr (p
, '\0');
13475 xsnprintf (p
, endbuf
- p
, "%x", num
);
13478 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13481 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13484 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13485 phex_nz (addr2
, 0));
13487 case tfind_outside
:
13488 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13489 phex_nz (addr2
, 0));
13492 error (_("Unknown trace find type %d"), type
);
13496 reply
= remote_get_noisy_reply ();
13497 if (*reply
== '\0')
13498 error (_("Target does not support this command."));
13500 while (reply
&& *reply
)
13505 target_frameno
= (int) strtol (p
, &reply
, 16);
13507 error (_("Unable to parse trace frame number"));
13508 /* Don't update our remote traceframe number cache on failure
13509 to select a remote traceframe. */
13510 if (target_frameno
== -1)
13515 target_tracept
= (int) strtol (p
, &reply
, 16);
13517 error (_("Unable to parse tracepoint number"));
13519 case 'O': /* "OK"? */
13520 if (reply
[1] == 'K' && reply
[2] == '\0')
13523 error (_("Bogus reply from target: %s"), reply
);
13526 error (_("Bogus reply from target: %s"), reply
);
13529 *tpp
= target_tracept
;
13531 rs
->remote_traceframe_number
= target_frameno
;
13532 return target_frameno
;
13536 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13538 struct remote_state
*rs
= get_remote_state ();
13542 set_remote_traceframe ();
13544 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13546 reply
= remote_get_noisy_reply ();
13547 if (reply
&& *reply
)
13551 unpack_varlen_hex (reply
+ 1, &uval
);
13552 *val
= (LONGEST
) uval
;
13560 remote_target::save_trace_data (const char *filename
)
13562 struct remote_state
*rs
= get_remote_state ();
13565 p
= rs
->buf
.data ();
13566 strcpy (p
, "QTSave:");
13568 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13569 >= get_remote_packet_size ())
13570 error (_("Remote file name too long for trace save packet"));
13571 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13574 reply
= remote_get_noisy_reply ();
13575 if (*reply
== '\0')
13576 error (_("Target does not support this command."));
13577 if (strcmp (reply
, "OK") != 0)
13578 error (_("Bogus reply from target: %s"), reply
);
13582 /* This is basically a memory transfer, but needs to be its own packet
13583 because we don't know how the target actually organizes its trace
13584 memory, plus we want to be able to ask for as much as possible, but
13585 not be unhappy if we don't get as much as we ask for. */
13588 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13590 struct remote_state
*rs
= get_remote_state ();
13595 p
= rs
->buf
.data ();
13596 strcpy (p
, "qTBuffer:");
13598 p
+= hexnumstr (p
, offset
);
13600 p
+= hexnumstr (p
, len
);
13604 reply
= remote_get_noisy_reply ();
13605 if (reply
&& *reply
)
13607 /* 'l' by itself means we're at the end of the buffer and
13608 there is nothing more to get. */
13612 /* Convert the reply into binary. Limit the number of bytes to
13613 convert according to our passed-in buffer size, rather than
13614 what was returned in the packet; if the target is
13615 unexpectedly generous and gives us a bigger reply than we
13616 asked for, we don't want to crash. */
13617 rslt
= hex2bin (reply
, buf
, len
);
13621 /* Something went wrong, flag as an error. */
13626 remote_target::set_disconnected_tracing (int val
)
13628 struct remote_state
*rs
= get_remote_state ();
13630 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13634 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13635 "QTDisconnected:%x", val
);
13637 reply
= remote_get_noisy_reply ();
13638 if (*reply
== '\0')
13639 error (_("Target does not support this command."));
13640 if (strcmp (reply
, "OK") != 0)
13641 error (_("Bogus reply from target: %s"), reply
);
13644 warning (_("Target does not support disconnected tracing."));
13648 remote_target::core_of_thread (ptid_t ptid
)
13650 thread_info
*info
= find_thread_ptid (this, ptid
);
13652 if (info
!= NULL
&& info
->priv
!= NULL
)
13653 return get_remote_thread_info (info
)->core
;
13659 remote_target::set_circular_trace_buffer (int val
)
13661 struct remote_state
*rs
= get_remote_state ();
13664 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13665 "QTBuffer:circular:%x", val
);
13667 reply
= remote_get_noisy_reply ();
13668 if (*reply
== '\0')
13669 error (_("Target does not support this command."));
13670 if (strcmp (reply
, "OK") != 0)
13671 error (_("Bogus reply from target: %s"), reply
);
13675 remote_target::traceframe_info ()
13677 gdb::optional
<gdb::char_vector
> text
13678 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO
,
13681 return parse_traceframe_info (text
->data ());
13686 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13687 instruction on which a fast tracepoint may be placed. Returns -1
13688 if the packet is not supported, and 0 if the minimum instruction
13689 length is unknown. */
13692 remote_target::get_min_fast_tracepoint_insn_len ()
13694 struct remote_state
*rs
= get_remote_state ();
13697 /* If we're not debugging a process yet, the IPA can't be
13699 if (!target_has_execution ())
13702 /* Make sure the remote is pointing at the right process. */
13703 set_general_process ();
13705 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13707 reply
= remote_get_noisy_reply ();
13708 if (*reply
== '\0')
13712 ULONGEST min_insn_len
;
13714 unpack_varlen_hex (reply
, &min_insn_len
);
13716 return (int) min_insn_len
;
13721 remote_target::set_trace_buffer_size (LONGEST val
)
13723 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13725 struct remote_state
*rs
= get_remote_state ();
13726 char *buf
= rs
->buf
.data ();
13727 char *endbuf
= buf
+ get_remote_packet_size ();
13728 enum packet_result result
;
13730 gdb_assert (val
>= 0 || val
== -1);
13731 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13732 /* Send -1 as literal "-1" to avoid host size dependency. */
13736 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13739 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13742 remote_get_noisy_reply ();
13743 result
= packet_ok (rs
->buf
,
13744 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13746 if (result
!= PACKET_OK
)
13747 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13752 remote_target::set_trace_notes (const char *user
, const char *notes
,
13753 const char *stop_notes
)
13755 struct remote_state
*rs
= get_remote_state ();
13757 char *buf
= rs
->buf
.data ();
13758 char *endbuf
= buf
+ get_remote_packet_size ();
13761 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13764 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13765 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13771 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13772 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13778 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13779 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13783 /* Ensure the buffer is terminated. */
13787 reply
= remote_get_noisy_reply ();
13788 if (*reply
== '\0')
13791 if (strcmp (reply
, "OK") != 0)
13792 error (_("Bogus reply from target: %s"), reply
);
13798 remote_target::use_agent (bool use
)
13800 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13802 struct remote_state
*rs
= get_remote_state ();
13804 /* If the stub supports QAgent. */
13805 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13807 getpkt (&rs
->buf
, 0);
13809 if (strcmp (rs
->buf
.data (), "OK") == 0)
13820 remote_target::can_use_agent ()
13822 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13825 struct btrace_target_info
13827 /* The ptid of the traced thread. */
13830 /* The obtained branch trace configuration. */
13831 struct btrace_config conf
;
13834 /* Reset our idea of our target's btrace configuration. */
13837 remote_btrace_reset (remote_state
*rs
)
13839 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13842 /* Synchronize the configuration with the target. */
13845 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13847 struct packet_config
*packet
;
13848 struct remote_state
*rs
;
13849 char *buf
, *pos
, *endbuf
;
13851 rs
= get_remote_state ();
13852 buf
= rs
->buf
.data ();
13853 endbuf
= buf
+ get_remote_packet_size ();
13855 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13856 if (packet_config_support (packet
) == PACKET_ENABLE
13857 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13860 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13864 getpkt (&rs
->buf
, 0);
13866 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13868 if (buf
[0] == 'E' && buf
[1] == '.')
13869 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13871 error (_("Failed to configure the BTS buffer size."));
13874 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13877 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13878 if (packet_config_support (packet
) == PACKET_ENABLE
13879 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13882 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13886 getpkt (&rs
->buf
, 0);
13888 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13890 if (buf
[0] == 'E' && buf
[1] == '.')
13891 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13893 error (_("Failed to configure the trace buffer size."));
13896 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13900 /* Read the current thread's btrace configuration from the target and
13901 store it into CONF. */
13904 btrace_read_config (struct btrace_config
*conf
)
13906 gdb::optional
<gdb::char_vector
> xml
13907 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF
, "");
13909 parse_xml_btrace_conf (conf
, xml
->data ());
13912 /* Maybe reopen target btrace. */
13915 remote_target::remote_btrace_maybe_reopen ()
13917 struct remote_state
*rs
= get_remote_state ();
13918 int btrace_target_pushed
= 0;
13919 #if !defined (HAVE_LIBIPT)
13923 /* Don't bother walking the entirety of the remote thread list when
13924 we know the feature isn't supported by the remote. */
13925 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
13928 scoped_restore_current_thread restore_thread
;
13930 for (thread_info
*tp
: all_non_exited_threads (this))
13932 set_general_thread (tp
->ptid
);
13934 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13935 btrace_read_config (&rs
->btrace_config
);
13937 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13940 #if !defined (HAVE_LIBIPT)
13941 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13946 warning (_("Target is recording using Intel Processor Trace "
13947 "but support was disabled at compile time."));
13952 #endif /* !defined (HAVE_LIBIPT) */
13954 /* Push target, once, but before anything else happens. This way our
13955 changes to the threads will be cleaned up by unpushing the target
13956 in case btrace_read_config () throws. */
13957 if (!btrace_target_pushed
)
13959 btrace_target_pushed
= 1;
13960 record_btrace_push_target ();
13961 printf_filtered (_("Target is recording using %s.\n"),
13962 btrace_format_string (rs
->btrace_config
.format
));
13965 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13966 tp
->btrace
.target
->ptid
= tp
->ptid
;
13967 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13971 /* Enable branch tracing. */
13973 struct btrace_target_info
*
13974 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
13976 struct btrace_target_info
*tinfo
= NULL
;
13977 struct packet_config
*packet
= NULL
;
13978 struct remote_state
*rs
= get_remote_state ();
13979 char *buf
= rs
->buf
.data ();
13980 char *endbuf
= buf
+ get_remote_packet_size ();
13982 switch (conf
->format
)
13984 case BTRACE_FORMAT_BTS
:
13985 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13988 case BTRACE_FORMAT_PT
:
13989 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13993 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13994 error (_("Target does not support branch tracing."));
13996 btrace_sync_conf (conf
);
13998 set_general_thread (ptid
);
14000 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14002 getpkt (&rs
->buf
, 0);
14004 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14006 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14007 error (_("Could not enable branch tracing for %s: %s"),
14008 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
14010 error (_("Could not enable branch tracing for %s."),
14011 target_pid_to_str (ptid
).c_str ());
14014 tinfo
= XCNEW (struct btrace_target_info
);
14015 tinfo
->ptid
= ptid
;
14017 /* If we fail to read the configuration, we lose some information, but the
14018 tracing itself is not impacted. */
14021 btrace_read_config (&tinfo
->conf
);
14023 catch (const gdb_exception_error
&err
)
14025 if (err
.message
!= NULL
)
14026 warning ("%s", err
.what ());
14032 /* Disable branch tracing. */
14035 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
14037 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
14038 struct remote_state
*rs
= get_remote_state ();
14039 char *buf
= rs
->buf
.data ();
14040 char *endbuf
= buf
+ get_remote_packet_size ();
14042 if (packet_config_support (packet
) != PACKET_ENABLE
)
14043 error (_("Target does not support branch tracing."));
14045 set_general_thread (tinfo
->ptid
);
14047 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
14049 getpkt (&rs
->buf
, 0);
14051 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
14053 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
14054 error (_("Could not disable branch tracing for %s: %s"),
14055 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
14057 error (_("Could not disable branch tracing for %s."),
14058 target_pid_to_str (tinfo
->ptid
).c_str ());
14064 /* Teardown branch tracing. */
14067 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
14069 /* We must not talk to the target during teardown. */
14073 /* Read the branch trace. */
14076 remote_target::read_btrace (struct btrace_data
*btrace
,
14077 struct btrace_target_info
*tinfo
,
14078 enum btrace_read_type type
)
14080 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
14083 if (packet_config_support (packet
) != PACKET_ENABLE
)
14084 error (_("Target does not support branch tracing."));
14086 #if !defined(HAVE_LIBEXPAT)
14087 error (_("Cannot process branch tracing result. XML parsing not supported."));
14092 case BTRACE_READ_ALL
:
14095 case BTRACE_READ_NEW
:
14098 case BTRACE_READ_DELTA
:
14102 internal_error (__FILE__
, __LINE__
,
14103 _("Bad branch tracing read type: %u."),
14104 (unsigned int) type
);
14107 gdb::optional
<gdb::char_vector
> xml
14108 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE
, annex
);
14110 return BTRACE_ERR_UNKNOWN
;
14112 parse_xml_btrace (btrace
, xml
->data ());
14114 return BTRACE_ERR_NONE
;
14117 const struct btrace_config
*
14118 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
14120 return &tinfo
->conf
;
14124 remote_target::augmented_libraries_svr4_read ()
14126 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
14130 /* Implementation of to_load. */
14133 remote_target::load (const char *name
, int from_tty
)
14135 generic_load (name
, from_tty
);
14138 /* Accepts an integer PID; returns a string representing a file that
14139 can be opened on the remote side to get the symbols for the child
14140 process. Returns NULL if the operation is not supported. */
14143 remote_target::pid_to_exec_file (int pid
)
14145 static gdb::optional
<gdb::char_vector
> filename
;
14146 char *annex
= NULL
;
14148 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
14151 inferior
*inf
= find_inferior_pid (this, pid
);
14153 internal_error (__FILE__
, __LINE__
,
14154 _("not currently attached to process %d"), pid
);
14156 if (!inf
->fake_pid_p
)
14158 const int annex_size
= 9;
14160 annex
= (char *) alloca (annex_size
);
14161 xsnprintf (annex
, annex_size
, "%x", pid
);
14164 filename
= target_read_stralloc (current_top_target (),
14165 TARGET_OBJECT_EXEC_FILE
, annex
);
14167 return filename
? filename
->data () : nullptr;
14170 /* Implement the to_can_do_single_step target_ops method. */
14173 remote_target::can_do_single_step ()
14175 /* We can only tell whether target supports single step or not by
14176 supported s and S vCont actions if the stub supports vContSupported
14177 feature. If the stub doesn't support vContSupported feature,
14178 we have conservatively to think target doesn't supports single
14180 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
14182 struct remote_state
*rs
= get_remote_state ();
14184 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14185 remote_vcont_probe ();
14187 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14193 /* Implementation of the to_execution_direction method for the remote
14196 enum exec_direction_kind
14197 remote_target::execution_direction ()
14199 struct remote_state
*rs
= get_remote_state ();
14201 return rs
->last_resume_exec_dir
;
14204 /* Return pointer to the thread_info struct which corresponds to
14205 THREAD_HANDLE (having length HANDLE_LEN). */
14208 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14212 for (thread_info
*tp
: all_non_exited_threads (this))
14214 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14216 if (tp
->inf
== inf
&& priv
!= NULL
)
14218 if (handle_len
!= priv
->thread_handle
.size ())
14219 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14220 handle_len
, priv
->thread_handle
.size ());
14221 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14231 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14233 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14234 return priv
->thread_handle
;
14238 remote_target::can_async_p ()
14240 struct remote_state
*rs
= get_remote_state ();
14242 /* We don't go async if the user has explicitly prevented it with the
14243 "maint set target-async" command. */
14244 if (!target_async_permitted
)
14247 /* We're async whenever the serial device is. */
14248 return serial_can_async_p (rs
->remote_desc
);
14252 remote_target::is_async_p ()
14254 struct remote_state
*rs
= get_remote_state ();
14256 if (!target_async_permitted
)
14257 /* We only enable async when the user specifically asks for it. */
14260 /* We're async whenever the serial device is. */
14261 return serial_is_async_p (rs
->remote_desc
);
14264 /* Pass the SERIAL event on and up to the client. One day this code
14265 will be able to delay notifying the client of an event until the
14266 point where an entire packet has been received. */
14268 static serial_event_ftype remote_async_serial_handler
;
14271 remote_async_serial_handler (struct serial
*scb
, void *context
)
14273 /* Don't propogate error information up to the client. Instead let
14274 the client find out about the error by querying the target. */
14275 inferior_event_handler (INF_REG_EVENT
);
14279 remote_async_inferior_event_handler (gdb_client_data data
)
14281 inferior_event_handler (INF_REG_EVENT
);
14285 remote_target::async_wait_fd ()
14287 struct remote_state
*rs
= get_remote_state ();
14288 return rs
->remote_desc
->fd
;
14292 remote_target::async (int enable
)
14294 struct remote_state
*rs
= get_remote_state ();
14298 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14300 /* If there are pending events in the stop reply queue tell the
14301 event loop to process them. */
14302 if (!rs
->stop_reply_queue
.empty ())
14303 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14304 /* For simplicity, below we clear the pending events token
14305 without remembering whether it is marked, so here we always
14306 mark it. If there's actually no pending notification to
14307 process, this ends up being a no-op (other than a spurious
14308 event-loop wakeup). */
14309 if (target_is_non_stop_p ())
14310 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14314 serial_async (rs
->remote_desc
, NULL
, NULL
);
14315 /* If the core is disabling async, it doesn't want to be
14316 disturbed with target events. Clear all async event sources
14318 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14319 if (target_is_non_stop_p ())
14320 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14324 /* Implementation of the to_thread_events method. */
14327 remote_target::thread_events (int enable
)
14329 struct remote_state
*rs
= get_remote_state ();
14330 size_t size
= get_remote_packet_size ();
14332 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14335 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14337 getpkt (&rs
->buf
, 0);
14339 switch (packet_ok (rs
->buf
,
14340 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14343 if (strcmp (rs
->buf
.data (), "OK") != 0)
14344 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14347 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14349 case PACKET_UNKNOWN
:
14355 show_remote_cmd (const char *args
, int from_tty
)
14357 /* We can't just use cmd_show_list here, because we want to skip
14358 the redundant "show remote Z-packet" and the legacy aliases. */
14359 struct cmd_list_element
*list
= remote_show_cmdlist
;
14360 struct ui_out
*uiout
= current_uiout
;
14362 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14363 for (; list
!= NULL
; list
= list
->next
)
14364 if (strcmp (list
->name
, "Z-packet") == 0)
14366 else if (list
->type
== not_set_cmd
)
14367 /* Alias commands are exactly like the original, except they
14368 don't have the normal type. */
14372 ui_out_emit_tuple
option_emitter (uiout
, "option");
14374 uiout
->field_string ("name", list
->name
);
14375 uiout
->text (": ");
14376 if (list
->type
== show_cmd
)
14377 do_show_command (NULL
, from_tty
, list
);
14379 cmd_func (list
, NULL
, from_tty
);
14384 /* Function to be called whenever a new objfile (shlib) is detected. */
14386 remote_new_objfile (struct objfile
*objfile
)
14388 remote_target
*remote
= get_current_remote_target ();
14390 if (remote
!= NULL
) /* Have a remote connection. */
14391 remote
->remote_check_symbols ();
14394 /* Pull all the tracepoints defined on the target and create local
14395 data structures representing them. We don't want to create real
14396 tracepoints yet, we don't want to mess up the user's existing
14400 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14402 struct remote_state
*rs
= get_remote_state ();
14405 /* Ask for a first packet of tracepoint definition. */
14407 getpkt (&rs
->buf
, 0);
14408 p
= rs
->buf
.data ();
14409 while (*p
&& *p
!= 'l')
14411 parse_tracepoint_definition (p
, utpp
);
14412 /* Ask for another packet of tracepoint definition. */
14414 getpkt (&rs
->buf
, 0);
14415 p
= rs
->buf
.data ();
14421 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14423 struct remote_state
*rs
= get_remote_state ();
14426 /* Ask for a first packet of variable definition. */
14428 getpkt (&rs
->buf
, 0);
14429 p
= rs
->buf
.data ();
14430 while (*p
&& *p
!= 'l')
14432 parse_tsv_definition (p
, utsvp
);
14433 /* Ask for another packet of variable definition. */
14435 getpkt (&rs
->buf
, 0);
14436 p
= rs
->buf
.data ();
14441 /* The "set/show range-stepping" show hook. */
14444 show_range_stepping (struct ui_file
*file
, int from_tty
,
14445 struct cmd_list_element
*c
,
14448 fprintf_filtered (file
,
14449 _("Debugger's willingness to use range stepping "
14450 "is %s.\n"), value
);
14453 /* Return true if the vCont;r action is supported by the remote
14457 remote_target::vcont_r_supported ()
14459 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14460 remote_vcont_probe ();
14462 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14463 && get_remote_state ()->supports_vCont
.r
);
14466 /* The "set/show range-stepping" set hook. */
14469 set_range_stepping (const char *ignore_args
, int from_tty
,
14470 struct cmd_list_element
*c
)
14472 /* When enabling, check whether range stepping is actually supported
14473 by the target, and warn if not. */
14474 if (use_range_stepping
)
14476 remote_target
*remote
= get_current_remote_target ();
14478 || !remote
->vcont_r_supported ())
14479 warning (_("Range stepping is not supported by the current target"));
14484 show_remote_debug (struct ui_file
*file
, int from_tty
,
14485 struct cmd_list_element
*c
, const char *value
)
14487 fprintf_filtered (file
, _("Debugging of remote protocol is %s.\n"),
14492 show_remote_timeout (struct ui_file
*file
, int from_tty
,
14493 struct cmd_list_element
*c
, const char *value
)
14495 fprintf_filtered (file
,
14496 _("Timeout limit to wait for target to respond is %s.\n"),
14500 /* Implement the "supports_memory_tagging" target_ops method. */
14503 remote_target::supports_memory_tagging ()
14508 /* Implement the "fetch_memtags" target_ops method. */
14511 remote_target::fetch_memtags (CORE_ADDR address
, size_t len
,
14512 gdb::byte_vector
&tags
, int type
)
14517 /* Implement the "store_memtags" target_ops method. */
14520 remote_target::store_memtags (CORE_ADDR address
, size_t len
,
14521 const gdb::byte_vector
&tags
, int type
)
14526 void _initialize_remote ();
14528 _initialize_remote ()
14530 struct cmd_list_element
*cmd
;
14531 const char *cmd_name
;
14533 /* architecture specific data */
14534 remote_g_packet_data_handle
=
14535 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14537 add_target (remote_target_info
, remote_target::open
);
14538 add_target (extended_remote_target_info
, extended_remote_target::open
);
14540 /* Hook into new objfile notification. */
14541 gdb::observers::new_objfile
.attach (remote_new_objfile
);
14544 init_remote_threadtests ();
14547 /* set/show remote ... */
14549 add_basic_prefix_cmd ("remote", class_maintenance
, _("\
14550 Remote protocol specific variables.\n\
14551 Configure various remote-protocol specific variables such as\n\
14552 the packets being used."),
14553 &remote_set_cmdlist
, "set remote ",
14554 0 /* allow-unknown */, &setlist
);
14555 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14556 Remote protocol specific variables.\n\
14557 Configure various remote-protocol specific variables such as\n\
14558 the packets being used."),
14559 &remote_show_cmdlist
, "show remote ",
14560 0 /* allow-unknown */, &showlist
);
14562 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14563 Compare section data on target to the exec file.\n\
14564 Argument is a single section name (default: all loaded sections).\n\
14565 To compare only read-only loaded sections, specify the -r option."),
14568 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14569 Send an arbitrary packet to a remote target.\n\
14570 maintenance packet TEXT\n\
14571 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14572 this command sends the string TEXT to the inferior, and displays the\n\
14573 response packet. GDB supplies the initial `$' character, and the\n\
14574 terminating `#' character and checksum."),
14577 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14578 Set whether to send break if interrupted."), _("\
14579 Show whether to send break if interrupted."), _("\
14580 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14581 set_remotebreak
, show_remotebreak
,
14582 &setlist
, &showlist
);
14583 cmd_name
= "remotebreak";
14584 cmd
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
14585 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14586 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14587 cmd
= lookup_cmd (&cmd_name
, showlist
, "", NULL
, -1, 1);
14588 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14590 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14591 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14593 Set interrupt sequence to remote target."), _("\
14594 Show interrupt sequence to remote target."), _("\
14595 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14596 NULL
, show_interrupt_sequence
,
14597 &remote_set_cmdlist
,
14598 &remote_show_cmdlist
);
14600 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14601 &interrupt_on_connect
, _("\
14602 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14603 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14604 If set, interrupt sequence is sent to remote target."),
14606 &remote_set_cmdlist
, &remote_show_cmdlist
);
14608 /* Install commands for configuring memory read/write packets. */
14610 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14611 Set the maximum number of bytes per memory write packet (deprecated)."),
14613 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14614 Show the maximum number of bytes per memory write packet (deprecated)."),
14616 add_cmd ("memory-write-packet-size", no_class
,
14617 set_memory_write_packet_size
, _("\
14618 Set the maximum number of bytes per memory-write packet.\n\
14619 Specify the number of bytes in a packet or 0 (zero) for the\n\
14620 default packet size. The actual limit is further reduced\n\
14621 dependent on the target. Specify ``fixed'' to disable the\n\
14622 further restriction and ``limit'' to enable that restriction."),
14623 &remote_set_cmdlist
);
14624 add_cmd ("memory-read-packet-size", no_class
,
14625 set_memory_read_packet_size
, _("\
14626 Set the maximum number of bytes per memory-read packet.\n\
14627 Specify the number of bytes in a packet or 0 (zero) for the\n\
14628 default packet size. The actual limit is further reduced\n\
14629 dependent on the target. Specify ``fixed'' to disable the\n\
14630 further restriction and ``limit'' to enable that restriction."),
14631 &remote_set_cmdlist
);
14632 add_cmd ("memory-write-packet-size", no_class
,
14633 show_memory_write_packet_size
,
14634 _("Show the maximum number of bytes per memory-write packet."),
14635 &remote_show_cmdlist
);
14636 add_cmd ("memory-read-packet-size", no_class
,
14637 show_memory_read_packet_size
,
14638 _("Show the maximum number of bytes per memory-read packet."),
14639 &remote_show_cmdlist
);
14641 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14642 &remote_hw_watchpoint_limit
, _("\
14643 Set the maximum number of target hardware watchpoints."), _("\
14644 Show the maximum number of target hardware watchpoints."), _("\
14645 Specify \"unlimited\" for unlimited hardware watchpoints."),
14646 NULL
, show_hardware_watchpoint_limit
,
14647 &remote_set_cmdlist
,
14648 &remote_show_cmdlist
);
14649 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14651 &remote_hw_watchpoint_length_limit
, _("\
14652 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14653 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14654 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14655 NULL
, show_hardware_watchpoint_length_limit
,
14656 &remote_set_cmdlist
, &remote_show_cmdlist
);
14657 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14658 &remote_hw_breakpoint_limit
, _("\
14659 Set the maximum number of target hardware breakpoints."), _("\
14660 Show the maximum number of target hardware breakpoints."), _("\
14661 Specify \"unlimited\" for unlimited hardware breakpoints."),
14662 NULL
, show_hardware_breakpoint_limit
,
14663 &remote_set_cmdlist
, &remote_show_cmdlist
);
14665 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14666 &remote_address_size
, _("\
14667 Set the maximum size of the address (in bits) in a memory packet."), _("\
14668 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14670 NULL
, /* FIXME: i18n: */
14671 &setlist
, &showlist
);
14673 init_all_packet_configs ();
14675 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14676 "X", "binary-download", 1);
14678 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14679 "vCont", "verbose-resume", 0);
14681 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14682 "QPassSignals", "pass-signals", 0);
14684 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14685 "QCatchSyscalls", "catch-syscalls", 0);
14687 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14688 "QProgramSignals", "program-signals", 0);
14690 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14691 "QSetWorkingDir", "set-working-dir", 0);
14693 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14694 "QStartupWithShell", "startup-with-shell", 0);
14696 add_packet_config_cmd (&remote_protocol_packets
14697 [PACKET_QEnvironmentHexEncoded
],
14698 "QEnvironmentHexEncoded", "environment-hex-encoded",
14701 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14702 "QEnvironmentReset", "environment-reset",
14705 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14706 "QEnvironmentUnset", "environment-unset",
14709 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14710 "qSymbol", "symbol-lookup", 0);
14712 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14713 "P", "set-register", 1);
14715 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14716 "p", "fetch-register", 1);
14718 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14719 "Z0", "software-breakpoint", 0);
14721 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14722 "Z1", "hardware-breakpoint", 0);
14724 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14725 "Z2", "write-watchpoint", 0);
14727 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14728 "Z3", "read-watchpoint", 0);
14730 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14731 "Z4", "access-watchpoint", 0);
14733 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14734 "qXfer:auxv:read", "read-aux-vector", 0);
14736 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14737 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14739 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14740 "qXfer:features:read", "target-features", 0);
14742 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14743 "qXfer:libraries:read", "library-info", 0);
14745 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14746 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14748 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14749 "qXfer:memory-map:read", "memory-map", 0);
14751 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14752 "qXfer:osdata:read", "osdata", 0);
14754 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14755 "qXfer:threads:read", "threads", 0);
14757 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14758 "qXfer:siginfo:read", "read-siginfo-object", 0);
14760 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14761 "qXfer:siginfo:write", "write-siginfo-object", 0);
14763 add_packet_config_cmd
14764 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14765 "qXfer:traceframe-info:read", "traceframe-info", 0);
14767 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14768 "qXfer:uib:read", "unwind-info-block", 0);
14770 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14771 "qGetTLSAddr", "get-thread-local-storage-address",
14774 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14775 "qGetTIBAddr", "get-thread-information-block-address",
14778 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14779 "bc", "reverse-continue", 0);
14781 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14782 "bs", "reverse-step", 0);
14784 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14785 "qSupported", "supported-packets", 0);
14787 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14788 "qSearch:memory", "search-memory", 0);
14790 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14791 "qTStatus", "trace-status", 0);
14793 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14794 "vFile:setfs", "hostio-setfs", 0);
14796 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14797 "vFile:open", "hostio-open", 0);
14799 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14800 "vFile:pread", "hostio-pread", 0);
14802 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14803 "vFile:pwrite", "hostio-pwrite", 0);
14805 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14806 "vFile:close", "hostio-close", 0);
14808 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14809 "vFile:unlink", "hostio-unlink", 0);
14811 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14812 "vFile:readlink", "hostio-readlink", 0);
14814 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14815 "vFile:fstat", "hostio-fstat", 0);
14817 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14818 "vAttach", "attach", 0);
14820 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14823 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14824 "QStartNoAckMode", "noack", 0);
14826 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14827 "vKill", "kill", 0);
14829 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14830 "qAttached", "query-attached", 0);
14832 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14833 "ConditionalTracepoints",
14834 "conditional-tracepoints", 0);
14836 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14837 "ConditionalBreakpoints",
14838 "conditional-breakpoints", 0);
14840 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14841 "BreakpointCommands",
14842 "breakpoint-commands", 0);
14844 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14845 "FastTracepoints", "fast-tracepoints", 0);
14847 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14848 "TracepointSource", "TracepointSource", 0);
14850 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14851 "QAllow", "allow", 0);
14853 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14854 "StaticTracepoints", "static-tracepoints", 0);
14856 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14857 "InstallInTrace", "install-in-trace", 0);
14859 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14860 "qXfer:statictrace:read", "read-sdata-object", 0);
14862 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14863 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14865 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14866 "QDisableRandomization", "disable-randomization", 0);
14868 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14869 "QAgent", "agent", 0);
14871 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14872 "QTBuffer:size", "trace-buffer-size", 0);
14874 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14875 "Qbtrace:off", "disable-btrace", 0);
14877 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14878 "Qbtrace:bts", "enable-btrace-bts", 0);
14880 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14881 "Qbtrace:pt", "enable-btrace-pt", 0);
14883 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14884 "qXfer:btrace", "read-btrace", 0);
14886 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14887 "qXfer:btrace-conf", "read-btrace-conf", 0);
14889 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14890 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14892 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14893 "multiprocess-feature", "multiprocess-feature", 0);
14895 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14896 "swbreak-feature", "swbreak-feature", 0);
14898 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14899 "hwbreak-feature", "hwbreak-feature", 0);
14901 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14902 "fork-event-feature", "fork-event-feature", 0);
14904 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14905 "vfork-event-feature", "vfork-event-feature", 0);
14907 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14908 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14910 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14911 "vContSupported", "verbose-resume-supported", 0);
14913 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14914 "exec-event-feature", "exec-event-feature", 0);
14916 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14917 "vCtrlC", "ctrl-c", 0);
14919 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14920 "QThreadEvents", "thread-events", 0);
14922 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14923 "N stop reply", "no-resumed-stop-reply", 0);
14925 /* Assert that we've registered "set remote foo-packet" commands
14926 for all packet configs. */
14930 for (i
= 0; i
< PACKET_MAX
; i
++)
14932 /* Ideally all configs would have a command associated. Some
14933 still don't though. */
14938 case PACKET_QNonStop
:
14939 case PACKET_EnableDisableTracepoints_feature
:
14940 case PACKET_tracenz_feature
:
14941 case PACKET_DisconnectedTracing_feature
:
14942 case PACKET_augmented_libraries_svr4_read_feature
:
14944 /* Additions to this list need to be well justified:
14945 pre-existing packets are OK; new packets are not. */
14953 /* This catches both forgetting to add a config command, and
14954 forgetting to remove a packet from the exception list. */
14955 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14959 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14960 Z sub-packet has its own set and show commands, but users may
14961 have sets to this variable in their .gdbinit files (or in their
14963 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14964 &remote_Z_packet_detect
, _("\
14965 Set use of remote protocol `Z' packets."), _("\
14966 Show use of remote protocol `Z' packets."), _("\
14967 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14969 set_remote_protocol_Z_packet_cmd
,
14970 show_remote_protocol_Z_packet_cmd
,
14971 /* FIXME: i18n: Use of remote protocol
14972 `Z' packets is %s. */
14973 &remote_set_cmdlist
, &remote_show_cmdlist
);
14975 add_basic_prefix_cmd ("remote", class_files
, _("\
14976 Manipulate files on the remote system.\n\
14977 Transfer files to and from the remote target system."),
14978 &remote_cmdlist
, "remote ",
14979 0 /* allow-unknown */, &cmdlist
);
14981 add_cmd ("put", class_files
, remote_put_command
,
14982 _("Copy a local file to the remote system."),
14985 add_cmd ("get", class_files
, remote_get_command
,
14986 _("Copy a remote file to the local system."),
14989 add_cmd ("delete", class_files
, remote_delete_command
,
14990 _("Delete a remote file."),
14993 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14994 &remote_exec_file_var
, _("\
14995 Set the remote pathname for \"run\"."), _("\
14996 Show the remote pathname for \"run\"."), NULL
,
14997 set_remote_exec_file
,
14998 show_remote_exec_file
,
14999 &remote_set_cmdlist
,
15000 &remote_show_cmdlist
);
15002 add_setshow_boolean_cmd ("range-stepping", class_run
,
15003 &use_range_stepping
, _("\
15004 Enable or disable range stepping."), _("\
15005 Show whether target-assisted range stepping is enabled."), _("\
15006 If on, and the target supports it, when stepping a source line, GDB\n\
15007 tells the target to step the corresponding range of addresses itself instead\n\
15008 of issuing multiple single-steps. This speeds up source level\n\
15009 stepping. If off, GDB always issues single-steps, even if range\n\
15010 stepping is supported by the target. The default is on."),
15011 set_range_stepping
,
15012 show_range_stepping
,
15016 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
15017 Set watchdog timer."), _("\
15018 Show watchdog timer."), _("\
15019 When non-zero, this timeout is used instead of waiting forever for a target\n\
15020 to finish a low-level step or continue operation. If the specified amount\n\
15021 of time passes without a response from the target, an error occurs."),
15024 &setlist
, &showlist
);
15026 add_setshow_zuinteger_unlimited_cmd ("remote-packet-max-chars", no_class
,
15027 &remote_packet_max_chars
, _("\
15028 Set the maximum number of characters to display for each remote packet."), _("\
15029 Show the maximum number of characters to display for each remote packet."), _("\
15030 Specify \"unlimited\" to display all the characters."),
15031 NULL
, show_remote_packet_max_chars
,
15032 &setdebuglist
, &showdebuglist
);
15034 add_setshow_boolean_cmd ("remote", no_class
, &remote_debug
,
15035 _("Set debugging of remote protocol."),
15036 _("Show debugging of remote protocol."),
15038 When enabled, each packet sent or received with the remote target\n\
15042 &setdebuglist
, &showdebuglist
);
15044 add_setshow_zuinteger_unlimited_cmd ("remotetimeout", no_class
,
15045 &remote_timeout
, _("\
15046 Set timeout limit to wait for target to respond."), _("\
15047 Show timeout limit to wait for target to respond."), _("\
15048 This value is used to set the time limit for gdb to wait for a response\n\
15049 from the target."),
15051 show_remote_timeout
,
15052 &setlist
, &showlist
);
15054 /* Eventually initialize fileio. See fileio.c */
15055 initialize_remote_fileio (&remote_set_cmdlist
, &remote_show_cmdlist
);