1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2019 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
30 #include "process-stratum-target.h"
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
39 #include "observable.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "gdbsupport/filestuff.h"
46 #include "gdbsupport/rsp-low.h"
50 #include "gdbsupport/gdb_sys_time.h"
52 #include "event-loop.h"
53 #include "event-top.h"
59 #include "gdbcore.h" /* for exec_bfd */
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
71 #include "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 <unordered_map>
80 /* The remote target. */
82 static const char remote_doc
[] = N_("\
83 Use a remote computer via a serial line, using a gdb-specific protocol.\n\
84 Specify the serial device it is connected to\n\
85 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
87 #define OPAQUETHREADBYTES 8
89 /* a 64 bit opaque identifier */
90 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
92 struct gdb_ext_thread_info
;
93 struct threads_listing_context
;
94 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
95 struct protocol_feature
;
99 typedef std::unique_ptr
<stop_reply
> stop_reply_up
;
101 /* Generic configuration support for packets the stub optionally
102 supports. Allows the user to specify the use of the packet as well
103 as allowing GDB to auto-detect support in the remote stub. */
107 PACKET_SUPPORT_UNKNOWN
= 0,
112 /* Analyze a packet's return value and update the packet config
122 struct threads_listing_context
;
124 /* Stub vCont actions support.
126 Each field is a boolean flag indicating whether the stub reports
127 support for the corresponding action. */
129 struct vCont_action_support
144 /* About this many threadisds fit in a packet. */
146 #define MAXTHREADLISTRESULTS 32
148 /* Data for the vFile:pread readahead cache. */
150 struct readahead_cache
152 /* Invalidate the readahead cache. */
155 /* Invalidate the readahead cache if it is holding data for FD. */
156 void invalidate_fd (int fd
);
158 /* Serve pread from the readahead cache. Returns number of bytes
159 read, or 0 if the request can't be served from the cache. */
160 int pread (int fd
, gdb_byte
*read_buf
, size_t len
, ULONGEST offset
);
162 /* The file descriptor for the file that is being cached. -1 if the
166 /* The offset into the file that the cache buffer corresponds
170 /* The buffer holding the cache contents. */
171 gdb_byte
*buf
= nullptr;
172 /* The buffer's size. We try to read as much as fits into a packet
176 /* Cache hit and miss counters. */
177 ULONGEST hit_count
= 0;
178 ULONGEST miss_count
= 0;
181 /* Description of the remote protocol for a given architecture. */
185 long offset
; /* Offset into G packet. */
186 long regnum
; /* GDB's internal register number. */
187 LONGEST pnum
; /* Remote protocol register number. */
188 int in_g_packet
; /* Always part of G packet. */
189 /* long size in bytes; == register_size (target_gdbarch (), regnum);
191 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
195 struct remote_arch_state
197 explicit remote_arch_state (struct gdbarch
*gdbarch
);
199 /* Description of the remote protocol registers. */
200 long sizeof_g_packet
;
202 /* Description of the remote protocol registers indexed by REGNUM
203 (making an array gdbarch_num_regs in size). */
204 std::unique_ptr
<packet_reg
[]> regs
;
206 /* This is the size (in chars) of the first response to the ``g''
207 packet. It is used as a heuristic when determining the maximum
208 size of memory-read and memory-write packets. A target will
209 typically only reserve a buffer large enough to hold the ``g''
210 packet. The size does not include packet overhead (headers and
212 long actual_register_packet_size
;
214 /* This is the maximum size (in chars) of a non read/write packet.
215 It is also used as a cap on the size of read/write packets. */
216 long remote_packet_size
;
219 /* Description of the remote protocol state for the currently
220 connected target. This is per-target state, and independent of the
221 selected architecture. */
230 /* Get the remote arch state for GDBARCH. */
231 struct remote_arch_state
*get_remote_arch_state (struct gdbarch
*gdbarch
);
235 /* A buffer to use for incoming packets, and its current size. The
236 buffer is grown dynamically for larger incoming packets.
237 Outgoing packets may also be constructed in this buffer.
238 The size of the buffer is always at least REMOTE_PACKET_SIZE;
239 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
241 gdb::char_vector buf
;
243 /* True if we're going through initial connection setup (finding out
244 about the remote side's threads, relocating symbols, etc.). */
245 bool starting_up
= false;
247 /* If we negotiated packet size explicitly (and thus can bypass
248 heuristics for the largest packet size that will not overflow
249 a buffer in the stub), this will be set to that packet size.
250 Otherwise zero, meaning to use the guessed size. */
251 long explicit_packet_size
= 0;
253 /* remote_wait is normally called when the target is running and
254 waits for a stop reply packet. But sometimes we need to call it
255 when the target is already stopped. We can send a "?" packet
256 and have remote_wait read the response. Or, if we already have
257 the response, we can stash it in BUF and tell remote_wait to
258 skip calling getpkt. This flag is set when BUF contains a
259 stop reply packet and the target is not waiting. */
260 int cached_wait_status
= 0;
262 /* True, if in no ack mode. That is, neither GDB nor the stub will
263 expect acks from each other. The connection is assumed to be
265 bool noack_mode
= false;
267 /* True if we're connected in extended remote mode. */
268 bool extended
= false;
270 /* True if we resumed the target and we're waiting for the target to
271 stop. In the mean time, we can't start another command/query.
272 The remote server wouldn't be ready to process it, so we'd
273 timeout waiting for a reply that would never come and eventually
274 we'd close the connection. This can happen in asynchronous mode
275 because we allow GDB commands while the target is running. */
276 bool waiting_for_stop_reply
= false;
278 /* The status of the stub support for the various vCont actions. */
279 vCont_action_support supports_vCont
;
281 /* True if the user has pressed Ctrl-C, but the target hasn't
282 responded to that. */
283 bool ctrlc_pending_p
= false;
285 /* True if we saw a Ctrl-C while reading or writing from/to the
286 remote descriptor. At that point it is not safe to send a remote
287 interrupt packet, so we instead remember we saw the Ctrl-C and
288 process it once we're done with sending/receiving the current
289 packet, which should be shortly. If however that takes too long,
290 and the user presses Ctrl-C again, we offer to disconnect. */
291 bool got_ctrlc_during_io
= false;
293 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
294 remote_open knows that we don't have a file open when the program
296 struct serial
*remote_desc
= nullptr;
298 /* These are the threads which we last sent to the remote system. The
299 TID member will be -1 for all or -2 for not sent yet. */
300 ptid_t general_thread
= null_ptid
;
301 ptid_t continue_thread
= null_ptid
;
303 /* This is the traceframe which we last selected on the remote system.
304 It will be -1 if no traceframe is selected. */
305 int remote_traceframe_number
= -1;
307 char *last_pass_packet
= nullptr;
309 /* The last QProgramSignals packet sent to the target. We bypass
310 sending a new program signals list down to the target if the new
311 packet is exactly the same as the last we sent. IOW, we only let
312 the target know about program signals list changes. */
313 char *last_program_signals_packet
= nullptr;
315 gdb_signal last_sent_signal
= GDB_SIGNAL_0
;
317 bool last_sent_step
= false;
319 /* The execution direction of the last resume we got. */
320 exec_direction_kind last_resume_exec_dir
= EXEC_FORWARD
;
322 char *finished_object
= nullptr;
323 char *finished_annex
= nullptr;
324 ULONGEST finished_offset
= 0;
326 /* Should we try the 'ThreadInfo' query packet?
328 This variable (NOT available to the user: auto-detect only!)
329 determines whether GDB will use the new, simpler "ThreadInfo"
330 query or the older, more complex syntax for thread queries.
331 This is an auto-detect variable (set to true at each connect,
332 and set to false when the target fails to recognize it). */
333 bool use_threadinfo_query
= false;
334 bool use_threadextra_query
= false;
336 threadref echo_nextthread
{};
337 threadref nextthread
{};
338 threadref resultthreadlist
[MAXTHREADLISTRESULTS
] {};
340 /* The state of remote notification. */
341 struct remote_notif_state
*notif_state
= nullptr;
343 /* The branch trace configuration. */
344 struct btrace_config btrace_config
{};
346 /* The argument to the last "vFile:setfs:" packet we sent, used
347 to avoid sending repeated unnecessary "vFile:setfs:" packets.
348 Initialized to -1 to indicate that no "vFile:setfs:" packet
349 has yet been sent. */
352 /* A readahead cache for vFile:pread. Often, reading a binary
353 involves a sequence of small reads. E.g., when parsing an ELF
354 file. A readahead cache helps mostly the case of remote
355 debugging on a connection with higher latency, due to the
356 request/reply nature of the RSP. We only cache data for a single
357 file descriptor at a time. */
358 struct readahead_cache readahead_cache
;
360 /* The list of already fetched and acknowledged stop events. This
361 queue is used for notification Stop, and other notifications
362 don't need queue for their events, because the notification
363 events of Stop can't be consumed immediately, so that events
364 should be queued first, and be consumed by remote_wait_{ns,as}
365 one per time. Other notifications can consume their events
366 immediately, so queue is not needed for them. */
367 std::vector
<stop_reply_up
> stop_reply_queue
;
369 /* Asynchronous signal handle registered as event loop source for
370 when we have pending events ready to be passed to the core. */
371 struct async_event_handler
*remote_async_inferior_event_token
= nullptr;
373 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
374 ``forever'' still use the normal timeout mechanism. This is
375 currently used by the ASYNC code to guarentee that target reads
376 during the initial connect always time-out. Once getpkt has been
377 modified to return a timeout indication and, in turn
378 remote_wait()/wait_for_inferior() have gained a timeout parameter
380 int wait_forever_enabled_p
= 1;
383 /* Mapping of remote protocol data for each gdbarch. Usually there
384 is only one entry here, though we may see more with stubs that
385 support multi-process. */
386 std::unordered_map
<struct gdbarch
*, remote_arch_state
>
390 static const target_info remote_target_info
= {
392 N_("Remote serial target in gdb-specific protocol"),
396 class remote_target
: public process_stratum_target
399 remote_target () = default;
400 ~remote_target () override
;
402 const target_info
&info () const override
403 { return remote_target_info
; }
405 thread_control_capabilities
get_thread_control_capabilities () override
406 { return tc_schedlock
; }
408 /* Open a remote connection. */
409 static void open (const char *, int);
411 void close () override
;
413 void detach (inferior
*, int) override
;
414 void disconnect (const char *, int) override
;
416 void commit_resume () override
;
417 void resume (ptid_t
, int, enum gdb_signal
) override
;
418 ptid_t
wait (ptid_t
, struct target_waitstatus
*, int) override
;
420 void fetch_registers (struct regcache
*, int) override
;
421 void store_registers (struct regcache
*, int) override
;
422 void prepare_to_store (struct regcache
*) override
;
424 void files_info () override
;
426 int insert_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
428 int remove_breakpoint (struct gdbarch
*, struct bp_target_info
*,
429 enum remove_bp_reason
) override
;
432 bool stopped_by_sw_breakpoint () override
;
433 bool supports_stopped_by_sw_breakpoint () override
;
435 bool stopped_by_hw_breakpoint () override
;
437 bool supports_stopped_by_hw_breakpoint () override
;
439 bool stopped_by_watchpoint () override
;
441 bool stopped_data_address (CORE_ADDR
*) override
;
443 bool watchpoint_addr_within_range (CORE_ADDR
, CORE_ADDR
, int) override
;
445 int can_use_hw_breakpoint (enum bptype
, int, int) override
;
447 int insert_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
449 int remove_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
451 int region_ok_for_hw_watchpoint (CORE_ADDR
, int) override
;
453 int insert_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
454 struct expression
*) override
;
456 int remove_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
457 struct expression
*) override
;
459 void kill () override
;
461 void load (const char *, int) override
;
463 void mourn_inferior () override
;
465 void pass_signals (gdb::array_view
<const unsigned char>) override
;
467 int set_syscall_catchpoint (int, bool, int,
468 gdb::array_view
<const int>) override
;
470 void program_signals (gdb::array_view
<const unsigned char>) override
;
472 bool thread_alive (ptid_t ptid
) override
;
474 const char *thread_name (struct thread_info
*) override
;
476 void update_thread_list () override
;
478 std::string
pid_to_str (ptid_t
) override
;
480 const char *extra_thread_info (struct thread_info
*) override
;
482 ptid_t
get_ada_task_ptid (long lwp
, long thread
) override
;
484 thread_info
*thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
486 inferior
*inf
) override
;
488 gdb::byte_vector
thread_info_to_thread_handle (struct thread_info
*tp
)
491 void stop (ptid_t
) override
;
493 void interrupt () override
;
495 void pass_ctrlc () override
;
497 enum target_xfer_status
xfer_partial (enum target_object object
,
500 const gdb_byte
*writebuf
,
501 ULONGEST offset
, ULONGEST len
,
502 ULONGEST
*xfered_len
) override
;
504 ULONGEST
get_memory_xfer_limit () override
;
506 void rcmd (const char *command
, struct ui_file
*output
) override
;
508 char *pid_to_exec_file (int pid
) override
;
510 void log_command (const char *cmd
) override
512 serial_log_command (this, cmd
);
515 CORE_ADDR
get_thread_local_address (ptid_t ptid
,
516 CORE_ADDR load_module_addr
,
517 CORE_ADDR offset
) override
;
519 bool can_execute_reverse () override
;
521 std::vector
<mem_region
> memory_map () override
;
523 void flash_erase (ULONGEST address
, LONGEST length
) override
;
525 void flash_done () override
;
527 const struct target_desc
*read_description () override
;
529 int search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
530 const gdb_byte
*pattern
, ULONGEST pattern_len
,
531 CORE_ADDR
*found_addrp
) override
;
533 bool can_async_p () override
;
535 bool is_async_p () override
;
537 void async (int) override
;
539 void thread_events (int) override
;
541 int can_do_single_step () override
;
543 void terminal_inferior () override
;
545 void terminal_ours () override
;
547 bool supports_non_stop () override
;
549 bool supports_multi_process () override
;
551 bool supports_disable_randomization () override
;
553 bool filesystem_is_local () override
;
556 int fileio_open (struct inferior
*inf
, const char *filename
,
557 int flags
, int mode
, int warn_if_slow
,
558 int *target_errno
) override
;
560 int fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
561 ULONGEST offset
, int *target_errno
) override
;
563 int fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
564 ULONGEST offset
, int *target_errno
) override
;
566 int fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
) override
;
568 int fileio_close (int fd
, int *target_errno
) override
;
570 int fileio_unlink (struct inferior
*inf
,
571 const char *filename
,
572 int *target_errno
) override
;
574 gdb::optional
<std::string
>
575 fileio_readlink (struct inferior
*inf
,
576 const char *filename
,
577 int *target_errno
) override
;
579 bool supports_enable_disable_tracepoint () override
;
581 bool supports_string_tracing () override
;
583 bool supports_evaluation_of_breakpoint_conditions () override
;
585 bool can_run_breakpoint_commands () override
;
587 void trace_init () override
;
589 void download_tracepoint (struct bp_location
*location
) override
;
591 bool can_download_tracepoint () override
;
593 void download_trace_state_variable (const trace_state_variable
&tsv
) override
;
595 void enable_tracepoint (struct bp_location
*location
) override
;
597 void disable_tracepoint (struct bp_location
*location
) override
;
599 void trace_set_readonly_regions () override
;
601 void trace_start () override
;
603 int get_trace_status (struct trace_status
*ts
) override
;
605 void get_tracepoint_status (struct breakpoint
*tp
, struct uploaded_tp
*utp
)
608 void trace_stop () override
;
610 int trace_find (enum trace_find_type type
, int num
,
611 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
) override
;
613 bool get_trace_state_variable_value (int tsv
, LONGEST
*val
) override
;
615 int save_trace_data (const char *filename
) override
;
617 int upload_tracepoints (struct uploaded_tp
**utpp
) override
;
619 int upload_trace_state_variables (struct uploaded_tsv
**utsvp
) override
;
621 LONGEST
get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
) override
;
623 int get_min_fast_tracepoint_insn_len () override
;
625 void set_disconnected_tracing (int val
) override
;
627 void set_circular_trace_buffer (int val
) override
;
629 void set_trace_buffer_size (LONGEST val
) override
;
631 bool set_trace_notes (const char *user
, const char *notes
,
632 const char *stopnotes
) override
;
634 int core_of_thread (ptid_t ptid
) override
;
636 int verify_memory (const gdb_byte
*data
,
637 CORE_ADDR memaddr
, ULONGEST size
) override
;
640 bool get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
) override
;
642 void set_permissions () override
;
644 bool static_tracepoint_marker_at (CORE_ADDR
,
645 struct static_tracepoint_marker
*marker
)
648 std::vector
<static_tracepoint_marker
>
649 static_tracepoint_markers_by_strid (const char *id
) override
;
651 traceframe_info_up
traceframe_info () override
;
653 bool use_agent (bool use
) override
;
654 bool can_use_agent () override
;
656 struct btrace_target_info
*enable_btrace (ptid_t ptid
,
657 const struct btrace_config
*conf
) override
;
659 void disable_btrace (struct btrace_target_info
*tinfo
) override
;
661 void teardown_btrace (struct btrace_target_info
*tinfo
) override
;
663 enum btrace_error
read_btrace (struct btrace_data
*data
,
664 struct btrace_target_info
*btinfo
,
665 enum btrace_read_type type
) override
;
667 const struct btrace_config
*btrace_conf (const struct btrace_target_info
*) override
;
668 bool augmented_libraries_svr4_read () override
;
669 int follow_fork (int, int) override
;
670 void follow_exec (struct inferior
*, const char *) override
;
671 int insert_fork_catchpoint (int) override
;
672 int remove_fork_catchpoint (int) override
;
673 int insert_vfork_catchpoint (int) override
;
674 int remove_vfork_catchpoint (int) override
;
675 int insert_exec_catchpoint (int) override
;
676 int remove_exec_catchpoint (int) override
;
677 enum exec_direction_kind
execution_direction () override
;
679 public: /* Remote specific methods. */
681 void remote_download_command_source (int num
, ULONGEST addr
,
682 struct command_line
*cmds
);
684 void remote_file_put (const char *local_file
, const char *remote_file
,
686 void remote_file_get (const char *remote_file
, const char *local_file
,
688 void remote_file_delete (const char *remote_file
, int from_tty
);
690 int remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
691 ULONGEST offset
, int *remote_errno
);
692 int remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
693 ULONGEST offset
, int *remote_errno
);
694 int remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
695 ULONGEST offset
, int *remote_errno
);
697 int remote_hostio_send_command (int command_bytes
, int which_packet
,
698 int *remote_errno
, char **attachment
,
699 int *attachment_len
);
700 int remote_hostio_set_filesystem (struct inferior
*inf
,
702 /* We should get rid of this and use fileio_open directly. */
703 int remote_hostio_open (struct inferior
*inf
, const char *filename
,
704 int flags
, int mode
, int warn_if_slow
,
706 int remote_hostio_close (int fd
, int *remote_errno
);
708 int remote_hostio_unlink (inferior
*inf
, const char *filename
,
711 struct remote_state
*get_remote_state ();
713 long get_remote_packet_size (void);
714 long get_memory_packet_size (struct memory_packet_config
*config
);
716 long get_memory_write_packet_size ();
717 long get_memory_read_packet_size ();
719 char *append_pending_thread_resumptions (char *p
, char *endp
,
721 static void open_1 (const char *name
, int from_tty
, int extended_p
);
722 void start_remote (int from_tty
, int extended_p
);
723 void remote_detach_1 (struct inferior
*inf
, int from_tty
);
725 char *append_resumption (char *p
, char *endp
,
726 ptid_t ptid
, int step
, gdb_signal siggnal
);
727 int remote_resume_with_vcont (ptid_t ptid
, int step
,
730 void add_current_inferior_and_thread (char *wait_status
);
732 ptid_t
wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
734 ptid_t
wait_as (ptid_t ptid
, target_waitstatus
*status
,
737 ptid_t
process_stop_reply (struct stop_reply
*stop_reply
,
738 target_waitstatus
*status
);
740 void remote_notice_new_inferior (ptid_t currthread
, int executing
);
742 void process_initial_stop_replies (int from_tty
);
744 thread_info
*remote_add_thread (ptid_t ptid
, bool running
, bool executing
);
746 void btrace_sync_conf (const btrace_config
*conf
);
748 void remote_btrace_maybe_reopen ();
750 void remove_new_fork_children (threads_listing_context
*context
);
751 void kill_new_fork_children (int pid
);
752 void discard_pending_stop_replies (struct inferior
*inf
);
753 int stop_reply_queue_length ();
755 void check_pending_events_prevent_wildcard_vcont
756 (int *may_global_wildcard_vcont
);
758 void discard_pending_stop_replies_in_queue ();
759 struct stop_reply
*remote_notif_remove_queued_reply (ptid_t ptid
);
760 struct stop_reply
*queued_stop_reply (ptid_t ptid
);
761 int peek_stop_reply (ptid_t ptid
);
762 void remote_parse_stop_reply (const char *buf
, stop_reply
*event
);
764 void remote_stop_ns (ptid_t ptid
);
765 void remote_interrupt_as ();
766 void remote_interrupt_ns ();
768 char *remote_get_noisy_reply ();
769 int remote_query_attached (int pid
);
770 inferior
*remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
773 ptid_t
remote_current_thread (ptid_t oldpid
);
774 ptid_t
get_current_thread (char *wait_status
);
776 void set_thread (ptid_t ptid
, int gen
);
777 void set_general_thread (ptid_t ptid
);
778 void set_continue_thread (ptid_t ptid
);
779 void set_general_process ();
781 char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
783 int remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
784 gdb_ext_thread_info
*info
);
785 int remote_get_threadinfo (threadref
*threadid
, int fieldset
,
786 gdb_ext_thread_info
*info
);
788 int parse_threadlist_response (char *pkt
, int result_limit
,
789 threadref
*original_echo
,
790 threadref
*resultlist
,
792 int remote_get_threadlist (int startflag
, threadref
*nextthread
,
793 int result_limit
, int *done
, int *result_count
,
794 threadref
*threadlist
);
796 int remote_threadlist_iterator (rmt_thread_action stepfunction
,
797 void *context
, int looplimit
);
799 int remote_get_threads_with_ql (threads_listing_context
*context
);
800 int remote_get_threads_with_qxfer (threads_listing_context
*context
);
801 int remote_get_threads_with_qthreadinfo (threads_listing_context
*context
);
803 void extended_remote_restart ();
807 void remote_check_symbols ();
809 void remote_supported_packet (const struct protocol_feature
*feature
,
810 enum packet_support support
,
811 const char *argument
);
813 void remote_query_supported ();
815 void remote_packet_size (const protocol_feature
*feature
,
816 packet_support support
, const char *value
);
818 void remote_serial_quit_handler ();
820 void remote_detach_pid (int pid
);
822 void remote_vcont_probe ();
824 void remote_resume_with_hc (ptid_t ptid
, int step
,
827 void send_interrupt_sequence ();
828 void interrupt_query ();
830 void remote_notif_get_pending_events (notif_client
*nc
);
832 int fetch_register_using_p (struct regcache
*regcache
,
834 int send_g_packet ();
835 void process_g_packet (struct regcache
*regcache
);
836 void fetch_registers_using_g (struct regcache
*regcache
);
837 int store_register_using_P (const struct regcache
*regcache
,
839 void store_registers_using_G (const struct regcache
*regcache
);
841 void set_remote_traceframe ();
843 void check_binary_download (CORE_ADDR addr
);
845 target_xfer_status
remote_write_bytes_aux (const char *header
,
847 const gdb_byte
*myaddr
,
850 ULONGEST
*xfered_len_units
,
854 target_xfer_status
remote_write_bytes (CORE_ADDR memaddr
,
855 const gdb_byte
*myaddr
, ULONGEST len
,
856 int unit_size
, ULONGEST
*xfered_len
);
858 target_xfer_status
remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
860 int unit_size
, ULONGEST
*xfered_len_units
);
862 target_xfer_status
remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
866 ULONGEST
*xfered_len
);
868 target_xfer_status
remote_read_bytes (CORE_ADDR memaddr
,
869 gdb_byte
*myaddr
, ULONGEST len
,
871 ULONGEST
*xfered_len
);
873 packet_result
remote_send_printf (const char *format
, ...)
874 ATTRIBUTE_PRINTF (2, 3);
876 target_xfer_status
remote_flash_write (ULONGEST address
,
877 ULONGEST length
, ULONGEST
*xfered_len
,
878 const gdb_byte
*data
);
880 int readchar (int timeout
);
882 void remote_serial_write (const char *str
, int len
);
884 int putpkt (const char *buf
);
885 int putpkt_binary (const char *buf
, int cnt
);
887 int putpkt (const gdb::char_vector
&buf
)
889 return putpkt (buf
.data ());
893 long read_frame (gdb::char_vector
*buf_p
);
894 void getpkt (gdb::char_vector
*buf
, int forever
);
895 int getpkt_or_notif_sane_1 (gdb::char_vector
*buf
, int forever
,
896 int expecting_notif
, int *is_notif
);
897 int getpkt_sane (gdb::char_vector
*buf
, int forever
);
898 int getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
900 int remote_vkill (int pid
);
901 void remote_kill_k ();
903 void extended_remote_disable_randomization (int val
);
904 int extended_remote_run (const std::string
&args
);
906 void send_environment_packet (const char *action
,
910 void extended_remote_environment_support ();
911 void extended_remote_set_inferior_cwd ();
913 target_xfer_status
remote_write_qxfer (const char *object_name
,
915 const gdb_byte
*writebuf
,
916 ULONGEST offset
, LONGEST len
,
917 ULONGEST
*xfered_len
,
918 struct packet_config
*packet
);
920 target_xfer_status
remote_read_qxfer (const char *object_name
,
922 gdb_byte
*readbuf
, ULONGEST offset
,
924 ULONGEST
*xfered_len
,
925 struct packet_config
*packet
);
927 void push_stop_reply (struct stop_reply
*new_event
);
929 bool vcont_r_supported ();
931 void packet_command (const char *args
, int from_tty
);
933 private: /* data fields */
935 /* The remote state. Don't reference this directly. Use the
936 get_remote_state method instead. */
937 remote_state m_remote_state
;
940 static const target_info extended_remote_target_info
= {
942 N_("Extended remote serial target in gdb-specific protocol"),
946 /* Set up the extended remote target by extending the standard remote
947 target and adding to it. */
949 class extended_remote_target final
: public remote_target
952 const target_info
&info () const override
953 { return extended_remote_target_info
; }
955 /* Open an extended-remote connection. */
956 static void open (const char *, int);
958 bool can_create_inferior () override
{ return true; }
959 void create_inferior (const char *, const std::string
&,
960 char **, int) override
;
962 void detach (inferior
*, int) override
;
964 bool can_attach () override
{ return true; }
965 void attach (const char *, int) override
;
967 void post_attach (int) override
;
968 bool supports_disable_randomization () override
;
971 /* Per-program-space data key. */
972 static const struct program_space_key
<char, gdb::xfree_deleter
<char>>
975 /* The variable registered as the control variable used by the
976 remote exec-file commands. While the remote exec-file setting is
977 per-program-space, the set/show machinery uses this as the
978 location of the remote exec-file value. */
979 static char *remote_exec_file_var
;
981 /* The size to align memory write packets, when practical. The protocol
982 does not guarantee any alignment, and gdb will generate short
983 writes and unaligned writes, but even as a best-effort attempt this
984 can improve bulk transfers. For instance, if a write is misaligned
985 relative to the target's data bus, the stub may need to make an extra
986 round trip fetching data from the target. This doesn't make a
987 huge difference, but it's easy to do, so we try to be helpful.
989 The alignment chosen is arbitrary; usually data bus width is
990 important here, not the possibly larger cache line size. */
991 enum { REMOTE_ALIGN_WRITES
= 16 };
993 /* Prototypes for local functions. */
995 static int hexnumlen (ULONGEST num
);
997 static int stubhex (int ch
);
999 static int hexnumstr (char *, ULONGEST
);
1001 static int hexnumnstr (char *, ULONGEST
, int);
1003 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
1005 static void print_packet (const char *);
1007 static int stub_unpack_int (char *buff
, int fieldlength
);
1009 struct packet_config
;
1011 static void show_packet_config_cmd (struct packet_config
*config
);
1013 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
1015 struct cmd_list_element
*c
,
1018 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
1020 static void remote_async_inferior_event_handler (gdb_client_data
);
1022 static bool remote_read_description_p (struct target_ops
*target
);
1024 static void remote_console_output (const char *msg
);
1026 static void remote_btrace_reset (remote_state
*rs
);
1028 static void remote_unpush_and_throw (void);
1032 static struct cmd_list_element
*remote_cmdlist
;
1034 /* For "set remote" and "show remote". */
1036 static struct cmd_list_element
*remote_set_cmdlist
;
1037 static struct cmd_list_element
*remote_show_cmdlist
;
1039 /* Controls whether GDB is willing to use range stepping. */
1041 static bool use_range_stepping
= true;
1043 /* The max number of chars in debug output. The rest of chars are
1046 #define REMOTE_DEBUG_MAX_CHAR 512
1048 /* Private data that we'll store in (struct thread_info)->priv. */
1049 struct remote_thread_info
: public private_thread_info
1055 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1056 sequence of bytes. */
1057 gdb::byte_vector thread_handle
;
1059 /* Whether the target stopped for a breakpoint/watchpoint. */
1060 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1062 /* This is set to the data address of the access causing the target
1063 to stop for a watchpoint. */
1064 CORE_ADDR watch_data_address
= 0;
1066 /* Fields used by the vCont action coalescing implemented in
1067 remote_resume / remote_commit_resume. remote_resume stores each
1068 thread's last resume request in these fields, so that a later
1069 remote_commit_resume knows which is the proper action for this
1070 thread to include in the vCont packet. */
1072 /* True if the last target_resume call for this thread was a step
1073 request, false if a continue request. */
1074 int last_resume_step
= 0;
1076 /* The signal specified in the last target_resume call for this
1078 gdb_signal last_resume_sig
= GDB_SIGNAL_0
;
1080 /* Whether this thread was already vCont-resumed on the remote
1082 int vcont_resumed
= 0;
1085 remote_state::remote_state ()
1090 remote_state::~remote_state ()
1092 xfree (this->last_pass_packet
);
1093 xfree (this->last_program_signals_packet
);
1094 xfree (this->finished_object
);
1095 xfree (this->finished_annex
);
1098 /* Utility: generate error from an incoming stub packet. */
1100 trace_error (char *buf
)
1103 return; /* not an error msg */
1106 case '1': /* malformed packet error */
1107 if (*++buf
== '0') /* general case: */
1108 error (_("remote.c: error in outgoing packet."));
1110 error (_("remote.c: error in outgoing packet at field #%ld."),
1111 strtol (buf
, NULL
, 16));
1113 error (_("Target returns error code '%s'."), buf
);
1117 /* Utility: wait for reply from stub, while accepting "O" packets. */
1120 remote_target::remote_get_noisy_reply ()
1122 struct remote_state
*rs
= get_remote_state ();
1124 do /* Loop on reply from remote stub. */
1128 QUIT
; /* Allow user to bail out with ^C. */
1129 getpkt (&rs
->buf
, 0);
1130 buf
= rs
->buf
.data ();
1133 else if (startswith (buf
, "qRelocInsn:"))
1136 CORE_ADDR from
, to
, org_to
;
1138 int adjusted_size
= 0;
1141 p
= buf
+ strlen ("qRelocInsn:");
1142 pp
= unpack_varlen_hex (p
, &ul
);
1144 error (_("invalid qRelocInsn packet: %s"), buf
);
1148 unpack_varlen_hex (p
, &ul
);
1155 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
1158 catch (const gdb_exception
&ex
)
1160 if (ex
.error
== MEMORY_ERROR
)
1162 /* Propagate memory errors silently back to the
1163 target. The stub may have limited the range of
1164 addresses we can write to, for example. */
1168 /* Something unexpectedly bad happened. Be verbose
1169 so we can tell what, and propagate the error back
1170 to the stub, so it doesn't get stuck waiting for
1172 exception_fprintf (gdb_stderr
, ex
,
1173 _("warning: relocating instruction: "));
1180 adjusted_size
= to
- org_to
;
1182 xsnprintf (buf
, rs
->buf
.size (), "qRelocInsn:%x", adjusted_size
);
1186 else if (buf
[0] == 'O' && buf
[1] != 'K')
1187 remote_console_output (buf
+ 1); /* 'O' message from stub */
1189 return buf
; /* Here's the actual reply. */
1194 struct remote_arch_state
*
1195 remote_state::get_remote_arch_state (struct gdbarch
*gdbarch
)
1197 remote_arch_state
*rsa
;
1199 auto it
= this->m_arch_states
.find (gdbarch
);
1200 if (it
== this->m_arch_states
.end ())
1202 auto p
= this->m_arch_states
.emplace (std::piecewise_construct
,
1203 std::forward_as_tuple (gdbarch
),
1204 std::forward_as_tuple (gdbarch
));
1205 rsa
= &p
.first
->second
;
1207 /* Make sure that the packet buffer is plenty big enough for
1208 this architecture. */
1209 if (this->buf
.size () < rsa
->remote_packet_size
)
1210 this->buf
.resize (2 * rsa
->remote_packet_size
);
1218 /* Fetch the global remote target state. */
1221 remote_target::get_remote_state ()
1223 /* Make sure that the remote architecture state has been
1224 initialized, because doing so might reallocate rs->buf. Any
1225 function which calls getpkt also needs to be mindful of changes
1226 to rs->buf, but this call limits the number of places which run
1228 m_remote_state
.get_remote_arch_state (target_gdbarch ());
1230 return &m_remote_state
;
1233 /* Fetch the remote exec-file from the current program space. */
1236 get_remote_exec_file (void)
1238 char *remote_exec_file
;
1240 remote_exec_file
= remote_pspace_data
.get (current_program_space
);
1241 if (remote_exec_file
== NULL
)
1244 return remote_exec_file
;
1247 /* Set the remote exec file for PSPACE. */
1250 set_pspace_remote_exec_file (struct program_space
*pspace
,
1251 const char *remote_exec_file
)
1253 char *old_file
= remote_pspace_data
.get (pspace
);
1256 remote_pspace_data
.set (pspace
, xstrdup (remote_exec_file
));
1259 /* The "set/show remote exec-file" set command hook. */
1262 set_remote_exec_file (const char *ignored
, int from_tty
,
1263 struct cmd_list_element
*c
)
1265 gdb_assert (remote_exec_file_var
!= NULL
);
1266 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
1269 /* The "set/show remote exec-file" show command hook. */
1272 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
1273 struct cmd_list_element
*cmd
, const char *value
)
1275 fprintf_filtered (file
, "%s\n", remote_exec_file_var
);
1279 compare_pnums (const void *lhs_
, const void *rhs_
)
1281 const struct packet_reg
* const *lhs
1282 = (const struct packet_reg
* const *) lhs_
;
1283 const struct packet_reg
* const *rhs
1284 = (const struct packet_reg
* const *) rhs_
;
1286 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
1288 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
1295 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
1297 int regnum
, num_remote_regs
, offset
;
1298 struct packet_reg
**remote_regs
;
1300 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
1302 struct packet_reg
*r
= ®s
[regnum
];
1304 if (register_size (gdbarch
, regnum
) == 0)
1305 /* Do not try to fetch zero-sized (placeholder) registers. */
1308 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
1313 /* Define the g/G packet format as the contents of each register
1314 with a remote protocol number, in order of ascending protocol
1317 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
1318 for (num_remote_regs
= 0, regnum
= 0;
1319 regnum
< gdbarch_num_regs (gdbarch
);
1321 if (regs
[regnum
].pnum
!= -1)
1322 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
1324 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
1327 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
1329 remote_regs
[regnum
]->in_g_packet
= 1;
1330 remote_regs
[regnum
]->offset
= offset
;
1331 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
1337 /* Given the architecture described by GDBARCH, return the remote
1338 protocol register's number and the register's offset in the g/G
1339 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1340 If the target does not have a mapping for REGNUM, return false,
1341 otherwise, return true. */
1344 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
1345 int *pnum
, int *poffset
)
1347 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
1349 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
1351 map_regcache_remote_table (gdbarch
, regs
.data ());
1353 *pnum
= regs
[regnum
].pnum
;
1354 *poffset
= regs
[regnum
].offset
;
1359 remote_arch_state::remote_arch_state (struct gdbarch
*gdbarch
)
1361 /* Use the architecture to build a regnum<->pnum table, which will be
1362 1:1 unless a feature set specifies otherwise. */
1363 this->regs
.reset (new packet_reg
[gdbarch_num_regs (gdbarch
)] ());
1365 /* Record the maximum possible size of the g packet - it may turn out
1367 this->sizeof_g_packet
1368 = map_regcache_remote_table (gdbarch
, this->regs
.get ());
1370 /* Default maximum number of characters in a packet body. Many
1371 remote stubs have a hardwired buffer size of 400 bytes
1372 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1373 as the maximum packet-size to ensure that the packet and an extra
1374 NUL character can always fit in the buffer. This stops GDB
1375 trashing stubs that try to squeeze an extra NUL into what is
1376 already a full buffer (As of 1999-12-04 that was most stubs). */
1377 this->remote_packet_size
= 400 - 1;
1379 /* This one is filled in when a ``g'' packet is received. */
1380 this->actual_register_packet_size
= 0;
1382 /* Should rsa->sizeof_g_packet needs more space than the
1383 default, adjust the size accordingly. Remember that each byte is
1384 encoded as two characters. 32 is the overhead for the packet
1385 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1386 (``$NN:G...#NN'') is a better guess, the below has been padded a
1388 if (this->sizeof_g_packet
> ((this->remote_packet_size
- 32) / 2))
1389 this->remote_packet_size
= (this->sizeof_g_packet
* 2 + 32);
1392 /* Get a pointer to the current remote target. If not connected to a
1393 remote target, return NULL. */
1395 static remote_target
*
1396 get_current_remote_target ()
1398 target_ops
*proc_target
= find_target_at (process_stratum
);
1399 return dynamic_cast<remote_target
*> (proc_target
);
1402 /* Return the current allowed size of a remote packet. This is
1403 inferred from the current architecture, and should be used to
1404 limit the length of outgoing packets. */
1406 remote_target::get_remote_packet_size ()
1408 struct remote_state
*rs
= get_remote_state ();
1409 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1411 if (rs
->explicit_packet_size
)
1412 return rs
->explicit_packet_size
;
1414 return rsa
->remote_packet_size
;
1417 static struct packet_reg
*
1418 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1421 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
1425 struct packet_reg
*r
= &rsa
->regs
[regnum
];
1427 gdb_assert (r
->regnum
== regnum
);
1432 static struct packet_reg
*
1433 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1438 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
1440 struct packet_reg
*r
= &rsa
->regs
[i
];
1442 if (r
->pnum
== pnum
)
1448 /* Allow the user to specify what sequence to send to the remote
1449 when he requests a program interruption: Although ^C is usually
1450 what remote systems expect (this is the default, here), it is
1451 sometimes preferable to send a break. On other systems such
1452 as the Linux kernel, a break followed by g, which is Magic SysRq g
1453 is required in order to interrupt the execution. */
1454 const char interrupt_sequence_control_c
[] = "Ctrl-C";
1455 const char interrupt_sequence_break
[] = "BREAK";
1456 const char interrupt_sequence_break_g
[] = "BREAK-g";
1457 static const char *const interrupt_sequence_modes
[] =
1459 interrupt_sequence_control_c
,
1460 interrupt_sequence_break
,
1461 interrupt_sequence_break_g
,
1464 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
1467 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
1468 struct cmd_list_element
*c
,
1471 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
1472 fprintf_filtered (file
,
1473 _("Send the ASCII ETX character (Ctrl-c) "
1474 "to the remote target to interrupt the "
1475 "execution of the program.\n"));
1476 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
1477 fprintf_filtered (file
,
1478 _("send a break signal to the remote target "
1479 "to interrupt the execution of the program.\n"));
1480 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
1481 fprintf_filtered (file
,
1482 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1483 "the remote target to interrupt the execution "
1484 "of Linux kernel.\n"));
1486 internal_error (__FILE__
, __LINE__
,
1487 _("Invalid value for interrupt_sequence_mode: %s."),
1488 interrupt_sequence_mode
);
1491 /* This boolean variable specifies whether interrupt_sequence is sent
1492 to the remote target when gdb connects to it.
1493 This is mostly needed when you debug the Linux kernel: The Linux kernel
1494 expects BREAK g which is Magic SysRq g for connecting gdb. */
1495 static bool interrupt_on_connect
= false;
1497 /* This variable is used to implement the "set/show remotebreak" commands.
1498 Since these commands are now deprecated in favor of "set/show remote
1499 interrupt-sequence", it no longer has any effect on the code. */
1500 static bool remote_break
;
1503 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1506 interrupt_sequence_mode
= interrupt_sequence_break
;
1508 interrupt_sequence_mode
= interrupt_sequence_control_c
;
1512 show_remotebreak (struct ui_file
*file
, int from_tty
,
1513 struct cmd_list_element
*c
,
1518 /* This variable sets the number of bits in an address that are to be
1519 sent in a memory ("M" or "m") packet. Normally, after stripping
1520 leading zeros, the entire address would be sent. This variable
1521 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1522 initial implementation of remote.c restricted the address sent in
1523 memory packets to ``host::sizeof long'' bytes - (typically 32
1524 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1525 address was never sent. Since fixing this bug may cause a break in
1526 some remote targets this variable is principly provided to
1527 facilitate backward compatibility. */
1529 static unsigned int remote_address_size
;
1532 /* User configurable variables for the number of characters in a
1533 memory read/write packet. MIN (rsa->remote_packet_size,
1534 rsa->sizeof_g_packet) is the default. Some targets need smaller
1535 values (fifo overruns, et.al.) and some users need larger values
1536 (speed up transfers). The variables ``preferred_*'' (the user
1537 request), ``current_*'' (what was actually set) and ``forced_*''
1538 (Positive - a soft limit, negative - a hard limit). */
1540 struct memory_packet_config
1547 /* The default max memory-write-packet-size, when the setting is
1548 "fixed". The 16k is historical. (It came from older GDB's using
1549 alloca for buffers and the knowledge (folklore?) that some hosts
1550 don't cope very well with large alloca calls.) */
1551 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1553 /* The minimum remote packet size for memory transfers. Ensures we
1554 can write at least one byte. */
1555 #define MIN_MEMORY_PACKET_SIZE 20
1557 /* Get the memory packet size, assuming it is fixed. */
1560 get_fixed_memory_packet_size (struct memory_packet_config
*config
)
1562 gdb_assert (config
->fixed_p
);
1564 if (config
->size
<= 0)
1565 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
;
1567 return config
->size
;
1570 /* Compute the current size of a read/write packet. Since this makes
1571 use of ``actual_register_packet_size'' the computation is dynamic. */
1574 remote_target::get_memory_packet_size (struct memory_packet_config
*config
)
1576 struct remote_state
*rs
= get_remote_state ();
1577 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1580 if (config
->fixed_p
)
1581 what_they_get
= get_fixed_memory_packet_size (config
);
1584 what_they_get
= get_remote_packet_size ();
1585 /* Limit the packet to the size specified by the user. */
1586 if (config
->size
> 0
1587 && what_they_get
> config
->size
)
1588 what_they_get
= config
->size
;
1590 /* Limit it to the size of the targets ``g'' response unless we have
1591 permission from the stub to use a larger packet size. */
1592 if (rs
->explicit_packet_size
== 0
1593 && rsa
->actual_register_packet_size
> 0
1594 && what_they_get
> rsa
->actual_register_packet_size
)
1595 what_they_get
= rsa
->actual_register_packet_size
;
1597 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1598 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1600 /* Make sure there is room in the global buffer for this packet
1601 (including its trailing NUL byte). */
1602 if (rs
->buf
.size () < what_they_get
+ 1)
1603 rs
->buf
.resize (2 * what_they_get
);
1605 return what_they_get
;
1608 /* Update the size of a read/write packet. If they user wants
1609 something really big then do a sanity check. */
1612 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1614 int fixed_p
= config
->fixed_p
;
1615 long size
= config
->size
;
1618 error (_("Argument required (integer, `fixed' or `limited')."));
1619 else if (strcmp (args
, "hard") == 0
1620 || strcmp (args
, "fixed") == 0)
1622 else if (strcmp (args
, "soft") == 0
1623 || strcmp (args
, "limit") == 0)
1629 size
= strtoul (args
, &end
, 0);
1631 error (_("Invalid %s (bad syntax)."), config
->name
);
1633 /* Instead of explicitly capping the size of a packet to or
1634 disallowing it, the user is allowed to set the size to
1635 something arbitrarily large. */
1639 if (fixed_p
&& !config
->fixed_p
)
1641 /* So that the query shows the correct value. */
1642 long query_size
= (size
<= 0
1643 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1646 if (! query (_("The target may not be able to correctly handle a %s\n"
1647 "of %ld bytes. Change the packet size? "),
1648 config
->name
, query_size
))
1649 error (_("Packet size not changed."));
1651 /* Update the config. */
1652 config
->fixed_p
= fixed_p
;
1653 config
->size
= size
;
1657 show_memory_packet_size (struct memory_packet_config
*config
)
1659 if (config
->size
== 0)
1660 printf_filtered (_("The %s is 0 (default). "), config
->name
);
1662 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1663 if (config
->fixed_p
)
1664 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1665 get_fixed_memory_packet_size (config
));
1668 remote_target
*remote
= get_current_remote_target ();
1671 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1672 remote
->get_memory_packet_size (config
));
1674 puts_filtered ("The actual limit will be further reduced "
1675 "dependent on the target.\n");
1679 static struct memory_packet_config memory_write_packet_config
=
1681 "memory-write-packet-size",
1685 set_memory_write_packet_size (const char *args
, int from_tty
)
1687 set_memory_packet_size (args
, &memory_write_packet_config
);
1691 show_memory_write_packet_size (const char *args
, int from_tty
)
1693 show_memory_packet_size (&memory_write_packet_config
);
1696 /* Show the number of hardware watchpoints that can be used. */
1699 show_hardware_watchpoint_limit (struct ui_file
*file
, int from_tty
,
1700 struct cmd_list_element
*c
,
1703 fprintf_filtered (file
, _("The maximum number of target hardware "
1704 "watchpoints is %s.\n"), value
);
1707 /* Show the length limit (in bytes) for hardware watchpoints. */
1710 show_hardware_watchpoint_length_limit (struct ui_file
*file
, int from_tty
,
1711 struct cmd_list_element
*c
,
1714 fprintf_filtered (file
, _("The maximum length (in bytes) of a target "
1715 "hardware watchpoint is %s.\n"), value
);
1718 /* Show the number of hardware breakpoints that can be used. */
1721 show_hardware_breakpoint_limit (struct ui_file
*file
, int from_tty
,
1722 struct cmd_list_element
*c
,
1725 fprintf_filtered (file
, _("The maximum number of target hardware "
1726 "breakpoints is %s.\n"), value
);
1730 remote_target::get_memory_write_packet_size ()
1732 return get_memory_packet_size (&memory_write_packet_config
);
1735 static struct memory_packet_config memory_read_packet_config
=
1737 "memory-read-packet-size",
1741 set_memory_read_packet_size (const char *args
, int from_tty
)
1743 set_memory_packet_size (args
, &memory_read_packet_config
);
1747 show_memory_read_packet_size (const char *args
, int from_tty
)
1749 show_memory_packet_size (&memory_read_packet_config
);
1753 remote_target::get_memory_read_packet_size ()
1755 long size
= get_memory_packet_size (&memory_read_packet_config
);
1757 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1758 extra buffer size argument before the memory read size can be
1759 increased beyond this. */
1760 if (size
> get_remote_packet_size ())
1761 size
= get_remote_packet_size ();
1767 struct packet_config
1772 /* If auto, GDB auto-detects support for this packet or feature,
1773 either through qSupported, or by trying the packet and looking
1774 at the response. If true, GDB assumes the target supports this
1775 packet. If false, the packet is disabled. Configs that don't
1776 have an associated command always have this set to auto. */
1777 enum auto_boolean detect
;
1779 /* Does the target support this packet? */
1780 enum packet_support support
;
1783 static enum packet_support
packet_config_support (struct packet_config
*config
);
1784 static enum packet_support
packet_support (int packet
);
1787 show_packet_config_cmd (struct packet_config
*config
)
1789 const char *support
= "internal-error";
1791 switch (packet_config_support (config
))
1794 support
= "enabled";
1796 case PACKET_DISABLE
:
1797 support
= "disabled";
1799 case PACKET_SUPPORT_UNKNOWN
:
1800 support
= "unknown";
1803 switch (config
->detect
)
1805 case AUTO_BOOLEAN_AUTO
:
1806 printf_filtered (_("Support for the `%s' packet "
1807 "is auto-detected, currently %s.\n"),
1808 config
->name
, support
);
1810 case AUTO_BOOLEAN_TRUE
:
1811 case AUTO_BOOLEAN_FALSE
:
1812 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1813 config
->name
, support
);
1819 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1820 const char *title
, int legacy
)
1826 config
->name
= name
;
1827 config
->title
= title
;
1828 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet.",
1830 show_doc
= xstrprintf ("Show current use of remote "
1831 "protocol `%s' (%s) packet.",
1833 /* set/show TITLE-packet {auto,on,off} */
1834 cmd_name
= xstrprintf ("%s-packet", title
);
1835 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1836 &config
->detect
, set_doc
,
1837 show_doc
, NULL
, /* help_doc */
1839 show_remote_protocol_packet_cmd
,
1840 &remote_set_cmdlist
, &remote_show_cmdlist
);
1841 /* The command code copies the documentation strings. */
1844 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1849 legacy_name
= xstrprintf ("%s-packet", name
);
1850 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1851 &remote_set_cmdlist
);
1852 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1853 &remote_show_cmdlist
);
1857 static enum packet_result
1858 packet_check_result (const char *buf
)
1862 /* The stub recognized the packet request. Check that the
1863 operation succeeded. */
1865 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1867 /* "Enn" - definitly an error. */
1868 return PACKET_ERROR
;
1870 /* Always treat "E." as an error. This will be used for
1871 more verbose error messages, such as E.memtypes. */
1872 if (buf
[0] == 'E' && buf
[1] == '.')
1873 return PACKET_ERROR
;
1875 /* The packet may or may not be OK. Just assume it is. */
1879 /* The stub does not support the packet. */
1880 return PACKET_UNKNOWN
;
1883 static enum packet_result
1884 packet_check_result (const gdb::char_vector
&buf
)
1886 return packet_check_result (buf
.data ());
1889 static enum packet_result
1890 packet_ok (const char *buf
, struct packet_config
*config
)
1892 enum packet_result result
;
1894 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1895 && config
->support
== PACKET_DISABLE
)
1896 internal_error (__FILE__
, __LINE__
,
1897 _("packet_ok: attempt to use a disabled packet"));
1899 result
= packet_check_result (buf
);
1904 /* The stub recognized the packet request. */
1905 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1908 fprintf_unfiltered (gdb_stdlog
,
1909 "Packet %s (%s) is supported\n",
1910 config
->name
, config
->title
);
1911 config
->support
= PACKET_ENABLE
;
1914 case PACKET_UNKNOWN
:
1915 /* The stub does not support the packet. */
1916 if (config
->detect
== AUTO_BOOLEAN_AUTO
1917 && config
->support
== PACKET_ENABLE
)
1919 /* If the stub previously indicated that the packet was
1920 supported then there is a protocol error. */
1921 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1922 config
->name
, config
->title
);
1924 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1926 /* The user set it wrong. */
1927 error (_("Enabled packet %s (%s) not recognized by stub"),
1928 config
->name
, config
->title
);
1932 fprintf_unfiltered (gdb_stdlog
,
1933 "Packet %s (%s) is NOT supported\n",
1934 config
->name
, config
->title
);
1935 config
->support
= PACKET_DISABLE
;
1942 static enum packet_result
1943 packet_ok (const gdb::char_vector
&buf
, struct packet_config
*config
)
1945 return packet_ok (buf
.data (), config
);
1962 PACKET_vFile_pwrite
,
1964 PACKET_vFile_unlink
,
1965 PACKET_vFile_readlink
,
1968 PACKET_qXfer_features
,
1969 PACKET_qXfer_exec_file
,
1970 PACKET_qXfer_libraries
,
1971 PACKET_qXfer_libraries_svr4
,
1972 PACKET_qXfer_memory_map
,
1973 PACKET_qXfer_spu_read
,
1974 PACKET_qXfer_spu_write
,
1975 PACKET_qXfer_osdata
,
1976 PACKET_qXfer_threads
,
1977 PACKET_qXfer_statictrace_read
,
1978 PACKET_qXfer_traceframe_info
,
1984 PACKET_QPassSignals
,
1985 PACKET_QCatchSyscalls
,
1986 PACKET_QProgramSignals
,
1987 PACKET_QSetWorkingDir
,
1988 PACKET_QStartupWithShell
,
1989 PACKET_QEnvironmentHexEncoded
,
1990 PACKET_QEnvironmentReset
,
1991 PACKET_QEnvironmentUnset
,
1993 PACKET_qSearch_memory
,
1996 PACKET_QStartNoAckMode
,
1998 PACKET_qXfer_siginfo_read
,
1999 PACKET_qXfer_siginfo_write
,
2002 /* Support for conditional tracepoints. */
2003 PACKET_ConditionalTracepoints
,
2005 /* Support for target-side breakpoint conditions. */
2006 PACKET_ConditionalBreakpoints
,
2008 /* Support for target-side breakpoint commands. */
2009 PACKET_BreakpointCommands
,
2011 /* Support for fast tracepoints. */
2012 PACKET_FastTracepoints
,
2014 /* Support for static tracepoints. */
2015 PACKET_StaticTracepoints
,
2017 /* Support for installing tracepoints while a trace experiment is
2019 PACKET_InstallInTrace
,
2023 PACKET_TracepointSource
,
2026 PACKET_QDisableRandomization
,
2028 PACKET_QTBuffer_size
,
2032 PACKET_qXfer_btrace
,
2034 /* Support for the QNonStop packet. */
2037 /* Support for the QThreadEvents packet. */
2038 PACKET_QThreadEvents
,
2040 /* Support for multi-process extensions. */
2041 PACKET_multiprocess_feature
,
2043 /* Support for enabling and disabling tracepoints while a trace
2044 experiment is running. */
2045 PACKET_EnableDisableTracepoints_feature
,
2047 /* Support for collecting strings using the tracenz bytecode. */
2048 PACKET_tracenz_feature
,
2050 /* Support for continuing to run a trace experiment while GDB is
2052 PACKET_DisconnectedTracing_feature
,
2054 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2055 PACKET_augmented_libraries_svr4_read_feature
,
2057 /* Support for the qXfer:btrace-conf:read packet. */
2058 PACKET_qXfer_btrace_conf
,
2060 /* Support for the Qbtrace-conf:bts:size packet. */
2061 PACKET_Qbtrace_conf_bts_size
,
2063 /* Support for swbreak+ feature. */
2064 PACKET_swbreak_feature
,
2066 /* Support for hwbreak+ feature. */
2067 PACKET_hwbreak_feature
,
2069 /* Support for fork events. */
2070 PACKET_fork_event_feature
,
2072 /* Support for vfork events. */
2073 PACKET_vfork_event_feature
,
2075 /* Support for the Qbtrace-conf:pt:size packet. */
2076 PACKET_Qbtrace_conf_pt_size
,
2078 /* Support for exec events. */
2079 PACKET_exec_event_feature
,
2081 /* Support for query supported vCont actions. */
2082 PACKET_vContSupported
,
2084 /* Support remote CTRL-C. */
2087 /* Support TARGET_WAITKIND_NO_RESUMED. */
2093 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
2095 /* Returns the packet's corresponding "set remote foo-packet" command
2096 state. See struct packet_config for more details. */
2098 static enum auto_boolean
2099 packet_set_cmd_state (int packet
)
2101 return remote_protocol_packets
[packet
].detect
;
2104 /* Returns whether a given packet or feature is supported. This takes
2105 into account the state of the corresponding "set remote foo-packet"
2106 command, which may be used to bypass auto-detection. */
2108 static enum packet_support
2109 packet_config_support (struct packet_config
*config
)
2111 switch (config
->detect
)
2113 case AUTO_BOOLEAN_TRUE
:
2114 return PACKET_ENABLE
;
2115 case AUTO_BOOLEAN_FALSE
:
2116 return PACKET_DISABLE
;
2117 case AUTO_BOOLEAN_AUTO
:
2118 return config
->support
;
2120 gdb_assert_not_reached (_("bad switch"));
2124 /* Same as packet_config_support, but takes the packet's enum value as
2127 static enum packet_support
2128 packet_support (int packet
)
2130 struct packet_config
*config
= &remote_protocol_packets
[packet
];
2132 return packet_config_support (config
);
2136 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
2137 struct cmd_list_element
*c
,
2140 struct packet_config
*packet
;
2142 for (packet
= remote_protocol_packets
;
2143 packet
< &remote_protocol_packets
[PACKET_MAX
];
2146 if (&packet
->detect
== c
->var
)
2148 show_packet_config_cmd (packet
);
2152 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
2156 /* Should we try one of the 'Z' requests? */
2160 Z_PACKET_SOFTWARE_BP
,
2161 Z_PACKET_HARDWARE_BP
,
2168 /* For compatibility with older distributions. Provide a ``set remote
2169 Z-packet ...'' command that updates all the Z packet types. */
2171 static enum auto_boolean remote_Z_packet_detect
;
2174 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
2175 struct cmd_list_element
*c
)
2179 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2180 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
2184 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
2185 struct cmd_list_element
*c
,
2190 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2192 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
2196 /* Returns true if the multi-process extensions are in effect. */
2199 remote_multi_process_p (struct remote_state
*rs
)
2201 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
2204 /* Returns true if fork events are supported. */
2207 remote_fork_event_p (struct remote_state
*rs
)
2209 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
2212 /* Returns true if vfork events are supported. */
2215 remote_vfork_event_p (struct remote_state
*rs
)
2217 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
2220 /* Returns true if exec events are supported. */
2223 remote_exec_event_p (struct remote_state
*rs
)
2225 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
2228 /* Insert fork catchpoint target routine. If fork events are enabled
2229 then return success, nothing more to do. */
2232 remote_target::insert_fork_catchpoint (int pid
)
2234 struct remote_state
*rs
= get_remote_state ();
2236 return !remote_fork_event_p (rs
);
2239 /* Remove fork catchpoint target routine. Nothing to do, just
2243 remote_target::remove_fork_catchpoint (int pid
)
2248 /* Insert vfork catchpoint target routine. If vfork events are enabled
2249 then return success, nothing more to do. */
2252 remote_target::insert_vfork_catchpoint (int pid
)
2254 struct remote_state
*rs
= get_remote_state ();
2256 return !remote_vfork_event_p (rs
);
2259 /* Remove vfork catchpoint target routine. Nothing to do, just
2263 remote_target::remove_vfork_catchpoint (int pid
)
2268 /* Insert exec catchpoint target routine. If exec events are
2269 enabled, just return success. */
2272 remote_target::insert_exec_catchpoint (int pid
)
2274 struct remote_state
*rs
= get_remote_state ();
2276 return !remote_exec_event_p (rs
);
2279 /* Remove exec catchpoint target routine. Nothing to do, just
2283 remote_target::remove_exec_catchpoint (int pid
)
2290 /* Take advantage of the fact that the TID field is not used, to tag
2291 special ptids with it set to != 0. */
2292 static const ptid_t
magic_null_ptid (42000, -1, 1);
2293 static const ptid_t
not_sent_ptid (42000, -2, 1);
2294 static const ptid_t
any_thread_ptid (42000, 0, 1);
2296 /* Find out if the stub attached to PID (and hence GDB should offer to
2297 detach instead of killing it when bailing out). */
2300 remote_target::remote_query_attached (int pid
)
2302 struct remote_state
*rs
= get_remote_state ();
2303 size_t size
= get_remote_packet_size ();
2305 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
2308 if (remote_multi_process_p (rs
))
2309 xsnprintf (rs
->buf
.data (), size
, "qAttached:%x", pid
);
2311 xsnprintf (rs
->buf
.data (), size
, "qAttached");
2314 getpkt (&rs
->buf
, 0);
2316 switch (packet_ok (rs
->buf
,
2317 &remote_protocol_packets
[PACKET_qAttached
]))
2320 if (strcmp (rs
->buf
.data (), "1") == 0)
2324 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
2326 case PACKET_UNKNOWN
:
2333 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2334 has been invented by GDB, instead of reported by the target. Since
2335 we can be connected to a remote system before before knowing about
2336 any inferior, mark the target with execution when we find the first
2337 inferior. If ATTACHED is 1, then we had just attached to this
2338 inferior. If it is 0, then we just created this inferior. If it
2339 is -1, then try querying the remote stub to find out if it had
2340 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2341 attempt to open this inferior's executable as the main executable
2342 if no main executable is open already. */
2345 remote_target::remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
2348 struct inferior
*inf
;
2350 /* Check whether this process we're learning about is to be
2351 considered attached, or if is to be considered to have been
2352 spawned by the stub. */
2354 attached
= remote_query_attached (pid
);
2356 if (gdbarch_has_global_solist (target_gdbarch ()))
2358 /* If the target shares code across all inferiors, then every
2359 attach adds a new inferior. */
2360 inf
= add_inferior (pid
);
2362 /* ... and every inferior is bound to the same program space.
2363 However, each inferior may still have its own address
2365 inf
->aspace
= maybe_new_address_space ();
2366 inf
->pspace
= current_program_space
;
2370 /* In the traditional debugging scenario, there's a 1-1 match
2371 between program/address spaces. We simply bind the inferior
2372 to the program space's address space. */
2373 inf
= current_inferior ();
2374 inferior_appeared (inf
, pid
);
2377 inf
->attach_flag
= attached
;
2378 inf
->fake_pid_p
= fake_pid_p
;
2380 /* If no main executable is currently open then attempt to
2381 open the file that was executed to create this inferior. */
2382 if (try_open_exec
&& get_exec_file (0) == NULL
)
2383 exec_file_locate_attach (pid
, 0, 1);
2388 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
2389 static remote_thread_info
*get_remote_thread_info (ptid_t ptid
);
2391 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2392 according to RUNNING. */
2395 remote_target::remote_add_thread (ptid_t ptid
, bool running
, bool executing
)
2397 struct remote_state
*rs
= get_remote_state ();
2398 struct thread_info
*thread
;
2400 /* GDB historically didn't pull threads in the initial connection
2401 setup. If the remote target doesn't even have a concept of
2402 threads (e.g., a bare-metal target), even if internally we
2403 consider that a single-threaded target, mentioning a new thread
2404 might be confusing to the user. Be silent then, preserving the
2405 age old behavior. */
2406 if (rs
->starting_up
)
2407 thread
= add_thread_silent (ptid
);
2409 thread
= add_thread (ptid
);
2411 get_remote_thread_info (thread
)->vcont_resumed
= executing
;
2412 set_executing (ptid
, executing
);
2413 set_running (ptid
, running
);
2418 /* Come here when we learn about a thread id from the remote target.
2419 It may be the first time we hear about such thread, so take the
2420 opportunity to add it to GDB's thread list. In case this is the
2421 first time we're noticing its corresponding inferior, add it to
2422 GDB's inferior list as well. EXECUTING indicates whether the
2423 thread is (internally) executing or stopped. */
2426 remote_target::remote_notice_new_inferior (ptid_t currthread
, int executing
)
2428 /* In non-stop mode, we assume new found threads are (externally)
2429 running until proven otherwise with a stop reply. In all-stop,
2430 we can only get here if all threads are stopped. */
2431 int running
= target_is_non_stop_p () ? 1 : 0;
2433 /* If this is a new thread, add it to GDB's thread list.
2434 If we leave it up to WFI to do this, bad things will happen. */
2436 thread_info
*tp
= find_thread_ptid (currthread
);
2437 if (tp
!= NULL
&& tp
->state
== THREAD_EXITED
)
2439 /* We're seeing an event on a thread id we knew had exited.
2440 This has to be a new thread reusing the old id. Add it. */
2441 remote_add_thread (currthread
, running
, executing
);
2445 if (!in_thread_list (currthread
))
2447 struct inferior
*inf
= NULL
;
2448 int pid
= currthread
.pid ();
2450 if (inferior_ptid
.is_pid ()
2451 && pid
== inferior_ptid
.pid ())
2453 /* inferior_ptid has no thread member yet. This can happen
2454 with the vAttach -> remote_wait,"TAAthread:" path if the
2455 stub doesn't support qC. This is the first stop reported
2456 after an attach, so this is the main thread. Update the
2457 ptid in the thread list. */
2458 if (in_thread_list (ptid_t (pid
)))
2459 thread_change_ptid (inferior_ptid
, currthread
);
2462 remote_add_thread (currthread
, running
, executing
);
2463 inferior_ptid
= currthread
;
2468 if (magic_null_ptid
== inferior_ptid
)
2470 /* inferior_ptid is not set yet. This can happen with the
2471 vRun -> remote_wait,"TAAthread:" path if the stub
2472 doesn't support qC. This is the first stop reported
2473 after an attach, so this is the main thread. Update the
2474 ptid in the thread list. */
2475 thread_change_ptid (inferior_ptid
, currthread
);
2479 /* When connecting to a target remote, or to a target
2480 extended-remote which already was debugging an inferior, we
2481 may not know about it yet. Add it before adding its child
2482 thread, so notifications are emitted in a sensible order. */
2483 if (find_inferior_pid (currthread
.pid ()) == NULL
)
2485 struct remote_state
*rs
= get_remote_state ();
2486 bool fake_pid_p
= !remote_multi_process_p (rs
);
2488 inf
= remote_add_inferior (fake_pid_p
,
2489 currthread
.pid (), -1, 1);
2492 /* This is really a new thread. Add it. */
2493 thread_info
*new_thr
2494 = remote_add_thread (currthread
, running
, executing
);
2496 /* If we found a new inferior, let the common code do whatever
2497 it needs to with it (e.g., read shared libraries, insert
2498 breakpoints), unless we're just setting up an all-stop
2502 struct remote_state
*rs
= get_remote_state ();
2504 if (!rs
->starting_up
)
2505 notice_new_inferior (new_thr
, executing
, 0);
2510 /* Return THREAD's private thread data, creating it if necessary. */
2512 static remote_thread_info
*
2513 get_remote_thread_info (thread_info
*thread
)
2515 gdb_assert (thread
!= NULL
);
2517 if (thread
->priv
== NULL
)
2518 thread
->priv
.reset (new remote_thread_info
);
2520 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
2523 static remote_thread_info
*
2524 get_remote_thread_info (ptid_t ptid
)
2526 thread_info
*thr
= find_thread_ptid (ptid
);
2527 return get_remote_thread_info (thr
);
2530 /* Call this function as a result of
2531 1) A halt indication (T packet) containing a thread id
2532 2) A direct query of currthread
2533 3) Successful execution of set thread */
2536 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2538 rs
->general_thread
= currthread
;
2541 /* If 'QPassSignals' is supported, tell the remote stub what signals
2542 it can simply pass through to the inferior without reporting. */
2545 remote_target::pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2547 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2549 char *pass_packet
, *p
;
2551 struct remote_state
*rs
= get_remote_state ();
2553 gdb_assert (pass_signals
.size () < 256);
2554 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2556 if (pass_signals
[i
])
2559 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2560 strcpy (pass_packet
, "QPassSignals:");
2561 p
= pass_packet
+ strlen (pass_packet
);
2562 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2564 if (pass_signals
[i
])
2567 *p
++ = tohex (i
>> 4);
2568 *p
++ = tohex (i
& 15);
2577 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2579 putpkt (pass_packet
);
2580 getpkt (&rs
->buf
, 0);
2581 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2582 if (rs
->last_pass_packet
)
2583 xfree (rs
->last_pass_packet
);
2584 rs
->last_pass_packet
= pass_packet
;
2587 xfree (pass_packet
);
2591 /* If 'QCatchSyscalls' is supported, tell the remote stub
2592 to report syscalls to GDB. */
2595 remote_target::set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
2596 gdb::array_view
<const int> syscall_counts
)
2598 const char *catch_packet
;
2599 enum packet_result result
;
2602 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2604 /* Not supported. */
2608 if (needed
&& any_count
== 0)
2610 /* Count how many syscalls are to be caught. */
2611 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2613 if (syscall_counts
[i
] != 0)
2620 fprintf_unfiltered (gdb_stdlog
,
2621 "remote_set_syscall_catchpoint "
2622 "pid %d needed %d any_count %d n_sysno %d\n",
2623 pid
, needed
, any_count
, n_sysno
);
2626 std::string built_packet
;
2629 /* Prepare a packet with the sysno list, assuming max 8+1
2630 characters for a sysno. If the resulting packet size is too
2631 big, fallback on the non-selective packet. */
2632 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2633 built_packet
.reserve (maxpktsz
);
2634 built_packet
= "QCatchSyscalls:1";
2637 /* Add in each syscall to be caught. */
2638 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2640 if (syscall_counts
[i
] != 0)
2641 string_appendf (built_packet
, ";%zx", i
);
2644 if (built_packet
.size () > get_remote_packet_size ())
2646 /* catch_packet too big. Fallback to less efficient
2647 non selective mode, with GDB doing the filtering. */
2648 catch_packet
= "QCatchSyscalls:1";
2651 catch_packet
= built_packet
.c_str ();
2654 catch_packet
= "QCatchSyscalls:0";
2656 struct remote_state
*rs
= get_remote_state ();
2658 putpkt (catch_packet
);
2659 getpkt (&rs
->buf
, 0);
2660 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2661 if (result
== PACKET_OK
)
2667 /* If 'QProgramSignals' is supported, tell the remote stub what
2668 signals it should pass through to the inferior when detaching. */
2671 remote_target::program_signals (gdb::array_view
<const unsigned char> signals
)
2673 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2677 struct remote_state
*rs
= get_remote_state ();
2679 gdb_assert (signals
.size () < 256);
2680 for (size_t i
= 0; i
< signals
.size (); i
++)
2685 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2686 strcpy (packet
, "QProgramSignals:");
2687 p
= packet
+ strlen (packet
);
2688 for (size_t i
= 0; i
< signals
.size (); i
++)
2690 if (signal_pass_state (i
))
2693 *p
++ = tohex (i
>> 4);
2694 *p
++ = tohex (i
& 15);
2703 if (!rs
->last_program_signals_packet
2704 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2707 getpkt (&rs
->buf
, 0);
2708 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2709 xfree (rs
->last_program_signals_packet
);
2710 rs
->last_program_signals_packet
= packet
;
2717 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2718 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2719 thread. If GEN is set, set the general thread, if not, then set
2720 the step/continue thread. */
2722 remote_target::set_thread (ptid_t ptid
, int gen
)
2724 struct remote_state
*rs
= get_remote_state ();
2725 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2726 char *buf
= rs
->buf
.data ();
2727 char *endbuf
= buf
+ get_remote_packet_size ();
2733 *buf
++ = gen
? 'g' : 'c';
2734 if (ptid
== magic_null_ptid
)
2735 xsnprintf (buf
, endbuf
- buf
, "0");
2736 else if (ptid
== any_thread_ptid
)
2737 xsnprintf (buf
, endbuf
- buf
, "0");
2738 else if (ptid
== minus_one_ptid
)
2739 xsnprintf (buf
, endbuf
- buf
, "-1");
2741 write_ptid (buf
, endbuf
, ptid
);
2743 getpkt (&rs
->buf
, 0);
2745 rs
->general_thread
= ptid
;
2747 rs
->continue_thread
= ptid
;
2751 remote_target::set_general_thread (ptid_t ptid
)
2753 set_thread (ptid
, 1);
2757 remote_target::set_continue_thread (ptid_t ptid
)
2759 set_thread (ptid
, 0);
2762 /* Change the remote current process. Which thread within the process
2763 ends up selected isn't important, as long as it is the same process
2764 as what INFERIOR_PTID points to.
2766 This comes from that fact that there is no explicit notion of
2767 "selected process" in the protocol. The selected process for
2768 general operations is the process the selected general thread
2772 remote_target::set_general_process ()
2774 struct remote_state
*rs
= get_remote_state ();
2776 /* If the remote can't handle multiple processes, don't bother. */
2777 if (!remote_multi_process_p (rs
))
2780 /* We only need to change the remote current thread if it's pointing
2781 at some other process. */
2782 if (rs
->general_thread
.pid () != inferior_ptid
.pid ())
2783 set_general_thread (inferior_ptid
);
2787 /* Return nonzero if this is the main thread that we made up ourselves
2788 to model non-threaded targets as single-threaded. */
2791 remote_thread_always_alive (ptid_t ptid
)
2793 if (ptid
== magic_null_ptid
)
2794 /* The main thread is always alive. */
2797 if (ptid
.pid () != 0 && ptid
.lwp () == 0)
2798 /* The main thread is always alive. This can happen after a
2799 vAttach, if the remote side doesn't support
2806 /* Return nonzero if the thread PTID is still alive on the remote
2810 remote_target::thread_alive (ptid_t ptid
)
2812 struct remote_state
*rs
= get_remote_state ();
2815 /* Check if this is a thread that we made up ourselves to model
2816 non-threaded targets as single-threaded. */
2817 if (remote_thread_always_alive (ptid
))
2820 p
= rs
->buf
.data ();
2821 endp
= p
+ get_remote_packet_size ();
2824 write_ptid (p
, endp
, ptid
);
2827 getpkt (&rs
->buf
, 0);
2828 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2831 /* Return a pointer to a thread name if we know it and NULL otherwise.
2832 The thread_info object owns the memory for the name. */
2835 remote_target::thread_name (struct thread_info
*info
)
2837 if (info
->priv
!= NULL
)
2839 const std::string
&name
= get_remote_thread_info (info
)->name
;
2840 return !name
.empty () ? name
.c_str () : NULL
;
2846 /* About these extended threadlist and threadinfo packets. They are
2847 variable length packets but, the fields within them are often fixed
2848 length. They are redundent enough to send over UDP as is the
2849 remote protocol in general. There is a matching unit test module
2852 /* WARNING: This threadref data structure comes from the remote O.S.,
2853 libstub protocol encoding, and remote.c. It is not particularly
2856 /* Right now, the internal structure is int. We want it to be bigger.
2857 Plan to fix this. */
2859 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2861 /* gdb_ext_thread_info is an internal GDB data structure which is
2862 equivalent to the reply of the remote threadinfo packet. */
2864 struct gdb_ext_thread_info
2866 threadref threadid
; /* External form of thread reference. */
2867 int active
; /* Has state interesting to GDB?
2869 char display
[256]; /* Brief state display, name,
2870 blocked/suspended. */
2871 char shortname
[32]; /* To be used to name threads. */
2872 char more_display
[256]; /* Long info, statistics, queue depth,
2876 /* The volume of remote transfers can be limited by submitting
2877 a mask containing bits specifying the desired information.
2878 Use a union of these values as the 'selection' parameter to
2879 get_thread_info. FIXME: Make these TAG names more thread specific. */
2881 #define TAG_THREADID 1
2882 #define TAG_EXISTS 2
2883 #define TAG_DISPLAY 4
2884 #define TAG_THREADNAME 8
2885 #define TAG_MOREDISPLAY 16
2887 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2889 static char *unpack_nibble (char *buf
, int *val
);
2891 static char *unpack_byte (char *buf
, int *value
);
2893 static char *pack_int (char *buf
, int value
);
2895 static char *unpack_int (char *buf
, int *value
);
2897 static char *unpack_string (char *src
, char *dest
, int length
);
2899 static char *pack_threadid (char *pkt
, threadref
*id
);
2901 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2903 void int_to_threadref (threadref
*id
, int value
);
2905 static int threadref_to_int (threadref
*ref
);
2907 static void copy_threadref (threadref
*dest
, threadref
*src
);
2909 static int threadmatch (threadref
*dest
, threadref
*src
);
2911 static char *pack_threadinfo_request (char *pkt
, int mode
,
2914 static char *pack_threadlist_request (char *pkt
, int startflag
,
2916 threadref
*nextthread
);
2918 static int remote_newthread_step (threadref
*ref
, void *context
);
2921 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2922 buffer we're allowed to write to. Returns
2923 BUF+CHARACTERS_WRITTEN. */
2926 remote_target::write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2929 struct remote_state
*rs
= get_remote_state ();
2931 if (remote_multi_process_p (rs
))
2935 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2937 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2941 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2943 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2948 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2949 last parsed char. Returns null_ptid if no thread id is found, and
2950 throws an error if the thread id has an invalid format. */
2953 read_ptid (const char *buf
, const char **obuf
)
2955 const char *p
= buf
;
2957 ULONGEST pid
= 0, tid
= 0;
2961 /* Multi-process ptid. */
2962 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2964 error (_("invalid remote ptid: %s"), p
);
2967 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2970 return ptid_t (pid
, tid
, 0);
2973 /* No multi-process. Just a tid. */
2974 pp
= unpack_varlen_hex (p
, &tid
);
2976 /* Return null_ptid when no thread id is found. */
2984 /* Since the stub is not sending a process id, then default to
2985 what's in inferior_ptid, unless it's null at this point. If so,
2986 then since there's no way to know the pid of the reported
2987 threads, use the magic number. */
2988 if (inferior_ptid
== null_ptid
)
2989 pid
= magic_null_ptid
.pid ();
2991 pid
= inferior_ptid
.pid ();
2995 return ptid_t (pid
, tid
, 0);
3001 if (ch
>= 'a' && ch
<= 'f')
3002 return ch
- 'a' + 10;
3003 if (ch
>= '0' && ch
<= '9')
3005 if (ch
>= 'A' && ch
<= 'F')
3006 return ch
- 'A' + 10;
3011 stub_unpack_int (char *buff
, int fieldlength
)
3018 nibble
= stubhex (*buff
++);
3022 retval
= retval
<< 4;
3028 unpack_nibble (char *buf
, int *val
)
3030 *val
= fromhex (*buf
++);
3035 unpack_byte (char *buf
, int *value
)
3037 *value
= stub_unpack_int (buf
, 2);
3042 pack_int (char *buf
, int value
)
3044 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
3045 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
3046 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
3047 buf
= pack_hex_byte (buf
, (value
& 0xff));
3052 unpack_int (char *buf
, int *value
)
3054 *value
= stub_unpack_int (buf
, 8);
3058 #if 0 /* Currently unused, uncomment when needed. */
3059 static char *pack_string (char *pkt
, char *string
);
3062 pack_string (char *pkt
, char *string
)
3067 len
= strlen (string
);
3069 len
= 200; /* Bigger than most GDB packets, junk??? */
3070 pkt
= pack_hex_byte (pkt
, len
);
3074 if ((ch
== '\0') || (ch
== '#'))
3075 ch
= '*'; /* Protect encapsulation. */
3080 #endif /* 0 (unused) */
3083 unpack_string (char *src
, char *dest
, int length
)
3092 pack_threadid (char *pkt
, threadref
*id
)
3095 unsigned char *altid
;
3097 altid
= (unsigned char *) id
;
3098 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
3100 pkt
= pack_hex_byte (pkt
, *altid
++);
3106 unpack_threadid (char *inbuf
, threadref
*id
)
3109 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
3112 altref
= (char *) id
;
3114 while (inbuf
< limit
)
3116 x
= stubhex (*inbuf
++);
3117 y
= stubhex (*inbuf
++);
3118 *altref
++ = (x
<< 4) | y
;
3123 /* Externally, threadrefs are 64 bits but internally, they are still
3124 ints. This is due to a mismatch of specifications. We would like
3125 to use 64bit thread references internally. This is an adapter
3129 int_to_threadref (threadref
*id
, int value
)
3131 unsigned char *scan
;
3133 scan
= (unsigned char *) id
;
3139 *scan
++ = (value
>> 24) & 0xff;
3140 *scan
++ = (value
>> 16) & 0xff;
3141 *scan
++ = (value
>> 8) & 0xff;
3142 *scan
++ = (value
& 0xff);
3146 threadref_to_int (threadref
*ref
)
3149 unsigned char *scan
;
3155 value
= (value
<< 8) | ((*scan
++) & 0xff);
3160 copy_threadref (threadref
*dest
, threadref
*src
)
3163 unsigned char *csrc
, *cdest
;
3165 csrc
= (unsigned char *) src
;
3166 cdest
= (unsigned char *) dest
;
3173 threadmatch (threadref
*dest
, threadref
*src
)
3175 /* Things are broken right now, so just assume we got a match. */
3177 unsigned char *srcp
, *destp
;
3179 srcp
= (char *) src
;
3180 destp
= (char *) dest
;
3184 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
3191 threadid:1, # always request threadid
3198 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3201 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
3203 *pkt
++ = 'q'; /* Info Query */
3204 *pkt
++ = 'P'; /* process or thread info */
3205 pkt
= pack_int (pkt
, mode
); /* mode */
3206 pkt
= pack_threadid (pkt
, id
); /* threadid */
3207 *pkt
= '\0'; /* terminate */
3211 /* These values tag the fields in a thread info response packet. */
3212 /* Tagging the fields allows us to request specific fields and to
3213 add more fields as time goes by. */
3215 #define TAG_THREADID 1 /* Echo the thread identifier. */
3216 #define TAG_EXISTS 2 /* Is this process defined enough to
3217 fetch registers and its stack? */
3218 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3219 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3220 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3224 remote_target::remote_unpack_thread_info_response (char *pkt
,
3225 threadref
*expectedref
,
3226 gdb_ext_thread_info
*info
)
3228 struct remote_state
*rs
= get_remote_state ();
3232 char *limit
= pkt
+ rs
->buf
.size (); /* Plausible parsing limit. */
3235 /* info->threadid = 0; FIXME: implement zero_threadref. */
3237 info
->display
[0] = '\0';
3238 info
->shortname
[0] = '\0';
3239 info
->more_display
[0] = '\0';
3241 /* Assume the characters indicating the packet type have been
3243 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
3244 pkt
= unpack_threadid (pkt
, &ref
);
3247 warning (_("Incomplete response to threadinfo request."));
3248 if (!threadmatch (&ref
, expectedref
))
3249 { /* This is an answer to a different request. */
3250 warning (_("ERROR RMT Thread info mismatch."));
3253 copy_threadref (&info
->threadid
, &ref
);
3255 /* Loop on tagged fields , try to bail if somthing goes wrong. */
3257 /* Packets are terminated with nulls. */
3258 while ((pkt
< limit
) && mask
&& *pkt
)
3260 pkt
= unpack_int (pkt
, &tag
); /* tag */
3261 pkt
= unpack_byte (pkt
, &length
); /* length */
3262 if (!(tag
& mask
)) /* Tags out of synch with mask. */
3264 warning (_("ERROR RMT: threadinfo tag mismatch."));
3268 if (tag
== TAG_THREADID
)
3272 warning (_("ERROR RMT: length of threadid is not 16."));
3276 pkt
= unpack_threadid (pkt
, &ref
);
3277 mask
= mask
& ~TAG_THREADID
;
3280 if (tag
== TAG_EXISTS
)
3282 info
->active
= stub_unpack_int (pkt
, length
);
3284 mask
= mask
& ~(TAG_EXISTS
);
3287 warning (_("ERROR RMT: 'exists' length too long."));
3293 if (tag
== TAG_THREADNAME
)
3295 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
3296 mask
= mask
& ~TAG_THREADNAME
;
3299 if (tag
== TAG_DISPLAY
)
3301 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
3302 mask
= mask
& ~TAG_DISPLAY
;
3305 if (tag
== TAG_MOREDISPLAY
)
3307 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
3308 mask
= mask
& ~TAG_MOREDISPLAY
;
3311 warning (_("ERROR RMT: unknown thread info tag."));
3312 break; /* Not a tag we know about. */
3318 remote_target::remote_get_threadinfo (threadref
*threadid
,
3320 gdb_ext_thread_info
*info
)
3322 struct remote_state
*rs
= get_remote_state ();
3325 pack_threadinfo_request (rs
->buf
.data (), fieldset
, threadid
);
3327 getpkt (&rs
->buf
, 0);
3329 if (rs
->buf
[0] == '\0')
3332 result
= remote_unpack_thread_info_response (&rs
->buf
[2],
3337 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3340 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
3341 threadref
*nextthread
)
3343 *pkt
++ = 'q'; /* info query packet */
3344 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
3345 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
3346 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
3347 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
3352 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3355 remote_target::parse_threadlist_response (char *pkt
, int result_limit
,
3356 threadref
*original_echo
,
3357 threadref
*resultlist
,
3360 struct remote_state
*rs
= get_remote_state ();
3362 int count
, resultcount
, done
;
3365 /* Assume the 'q' and 'M chars have been stripped. */
3366 limit
= pkt
+ (rs
->buf
.size () - BUF_THREAD_ID_SIZE
);
3367 /* done parse past here */
3368 pkt
= unpack_byte (pkt
, &count
); /* count field */
3369 pkt
= unpack_nibble (pkt
, &done
);
3370 /* The first threadid is the argument threadid. */
3371 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
3372 while ((count
-- > 0) && (pkt
< limit
))
3374 pkt
= unpack_threadid (pkt
, resultlist
++);
3375 if (resultcount
++ >= result_limit
)
3383 /* Fetch the next batch of threads from the remote. Returns -1 if the
3384 qL packet is not supported, 0 on error and 1 on success. */
3387 remote_target::remote_get_threadlist (int startflag
, threadref
*nextthread
,
3388 int result_limit
, int *done
, int *result_count
,
3389 threadref
*threadlist
)
3391 struct remote_state
*rs
= get_remote_state ();
3394 /* Trancate result limit to be smaller than the packet size. */
3395 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
3396 >= get_remote_packet_size ())
3397 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
3399 pack_threadlist_request (rs
->buf
.data (), startflag
, result_limit
,
3402 getpkt (&rs
->buf
, 0);
3403 if (rs
->buf
[0] == '\0')
3405 /* Packet not supported. */
3410 parse_threadlist_response (&rs
->buf
[2], result_limit
,
3411 &rs
->echo_nextthread
, threadlist
, done
);
3413 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
3415 /* FIXME: This is a good reason to drop the packet. */
3416 /* Possably, there is a duplicate response. */
3418 retransmit immediatly - race conditions
3419 retransmit after timeout - yes
3421 wait for packet, then exit
3423 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3424 return 0; /* I choose simply exiting. */
3426 if (*result_count
<= 0)
3430 warning (_("RMT ERROR : failed to get remote thread list."));
3433 return result
; /* break; */
3435 if (*result_count
> result_limit
)
3438 warning (_("RMT ERROR: threadlist response longer than requested."));
3444 /* Fetch the list of remote threads, with the qL packet, and call
3445 STEPFUNCTION for each thread found. Stops iterating and returns 1
3446 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3447 STEPFUNCTION returns false. If the packet is not supported,
3451 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction
,
3452 void *context
, int looplimit
)
3454 struct remote_state
*rs
= get_remote_state ();
3455 int done
, i
, result_count
;
3463 if (loopcount
++ > looplimit
)
3466 warning (_("Remote fetch threadlist -infinite loop-."));
3469 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
3470 MAXTHREADLISTRESULTS
,
3471 &done
, &result_count
,
3472 rs
->resultthreadlist
);
3475 /* Clear for later iterations. */
3477 /* Setup to resume next batch of thread references, set nextthread. */
3478 if (result_count
>= 1)
3479 copy_threadref (&rs
->nextthread
,
3480 &rs
->resultthreadlist
[result_count
- 1]);
3482 while (result_count
--)
3484 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
3494 /* A thread found on the remote target. */
3498 explicit thread_item (ptid_t ptid_
)
3502 thread_item (thread_item
&&other
) = default;
3503 thread_item
&operator= (thread_item
&&other
) = default;
3505 DISABLE_COPY_AND_ASSIGN (thread_item
);
3507 /* The thread's PTID. */
3510 /* The thread's extra info. */
3513 /* The thread's name. */
3516 /* The core the thread was running on. -1 if not known. */
3519 /* The thread handle associated with the thread. */
3520 gdb::byte_vector thread_handle
;
3523 /* Context passed around to the various methods listing remote
3524 threads. As new threads are found, they're added to the ITEMS
3527 struct threads_listing_context
3529 /* Return true if this object contains an entry for a thread with ptid
3532 bool contains_thread (ptid_t ptid
) const
3534 auto match_ptid
= [&] (const thread_item
&item
)
3536 return item
.ptid
== ptid
;
3539 auto it
= std::find_if (this->items
.begin (),
3543 return it
!= this->items
.end ();
3546 /* Remove the thread with ptid PTID. */
3548 void remove_thread (ptid_t ptid
)
3550 auto match_ptid
= [&] (const thread_item
&item
)
3552 return item
.ptid
== ptid
;
3555 auto it
= std::remove_if (this->items
.begin (),
3559 if (it
!= this->items
.end ())
3560 this->items
.erase (it
);
3563 /* The threads found on the remote target. */
3564 std::vector
<thread_item
> items
;
3568 remote_newthread_step (threadref
*ref
, void *data
)
3570 struct threads_listing_context
*context
3571 = (struct threads_listing_context
*) data
;
3572 int pid
= inferior_ptid
.pid ();
3573 int lwp
= threadref_to_int (ref
);
3574 ptid_t
ptid (pid
, lwp
);
3576 context
->items
.emplace_back (ptid
);
3578 return 1; /* continue iterator */
3581 #define CRAZY_MAX_THREADS 1000
3584 remote_target::remote_current_thread (ptid_t oldpid
)
3586 struct remote_state
*rs
= get_remote_state ();
3589 getpkt (&rs
->buf
, 0);
3590 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3595 result
= read_ptid (&rs
->buf
[2], &obuf
);
3596 if (*obuf
!= '\0' && remote_debug
)
3597 fprintf_unfiltered (gdb_stdlog
,
3598 "warning: garbage in qC reply\n");
3606 /* List remote threads using the deprecated qL packet. */
3609 remote_target::remote_get_threads_with_ql (threads_listing_context
*context
)
3611 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3612 CRAZY_MAX_THREADS
) >= 0)
3618 #if defined(HAVE_LIBEXPAT)
3621 start_thread (struct gdb_xml_parser
*parser
,
3622 const struct gdb_xml_element
*element
,
3624 std::vector
<gdb_xml_value
> &attributes
)
3626 struct threads_listing_context
*data
3627 = (struct threads_listing_context
*) user_data
;
3628 struct gdb_xml_value
*attr
;
3630 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3631 ptid_t ptid
= read_ptid (id
, NULL
);
3633 data
->items
.emplace_back (ptid
);
3634 thread_item
&item
= data
->items
.back ();
3636 attr
= xml_find_attribute (attributes
, "core");
3638 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3640 attr
= xml_find_attribute (attributes
, "name");
3642 item
.name
= (const char *) attr
->value
.get ();
3644 attr
= xml_find_attribute (attributes
, "handle");
3646 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3650 end_thread (struct gdb_xml_parser
*parser
,
3651 const struct gdb_xml_element
*element
,
3652 void *user_data
, const char *body_text
)
3654 struct threads_listing_context
*data
3655 = (struct threads_listing_context
*) user_data
;
3657 if (body_text
!= NULL
&& *body_text
!= '\0')
3658 data
->items
.back ().extra
= body_text
;
3661 const struct gdb_xml_attribute thread_attributes
[] = {
3662 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3663 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3664 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3665 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3666 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3669 const struct gdb_xml_element thread_children
[] = {
3670 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3673 const struct gdb_xml_element threads_children
[] = {
3674 { "thread", thread_attributes
, thread_children
,
3675 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3676 start_thread
, end_thread
},
3677 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3680 const struct gdb_xml_element threads_elements
[] = {
3681 { "threads", NULL
, threads_children
,
3682 GDB_XML_EF_NONE
, NULL
, NULL
},
3683 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3688 /* List remote threads using qXfer:threads:read. */
3691 remote_target::remote_get_threads_with_qxfer (threads_listing_context
*context
)
3693 #if defined(HAVE_LIBEXPAT)
3694 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3696 gdb::optional
<gdb::char_vector
> xml
3697 = target_read_stralloc (this, TARGET_OBJECT_THREADS
, NULL
);
3699 if (xml
&& (*xml
)[0] != '\0')
3701 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3702 threads_elements
, xml
->data (), context
);
3712 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3715 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context
*context
)
3717 struct remote_state
*rs
= get_remote_state ();
3719 if (rs
->use_threadinfo_query
)
3723 putpkt ("qfThreadInfo");
3724 getpkt (&rs
->buf
, 0);
3725 bufp
= rs
->buf
.data ();
3726 if (bufp
[0] != '\0') /* q packet recognized */
3728 while (*bufp
++ == 'm') /* reply contains one or more TID */
3732 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3733 context
->items
.emplace_back (ptid
);
3735 while (*bufp
++ == ','); /* comma-separated list */
3736 putpkt ("qsThreadInfo");
3737 getpkt (&rs
->buf
, 0);
3738 bufp
= rs
->buf
.data ();
3744 /* Packet not recognized. */
3745 rs
->use_threadinfo_query
= 0;
3752 /* Implement the to_update_thread_list function for the remote
3756 remote_target::update_thread_list ()
3758 struct threads_listing_context context
;
3761 /* We have a few different mechanisms to fetch the thread list. Try
3762 them all, starting with the most preferred one first, falling
3763 back to older methods. */
3764 if (remote_get_threads_with_qxfer (&context
)
3765 || remote_get_threads_with_qthreadinfo (&context
)
3766 || remote_get_threads_with_ql (&context
))
3770 if (context
.items
.empty ()
3771 && remote_thread_always_alive (inferior_ptid
))
3773 /* Some targets don't really support threads, but still
3774 reply an (empty) thread list in response to the thread
3775 listing packets, instead of replying "packet not
3776 supported". Exit early so we don't delete the main
3781 /* CONTEXT now holds the current thread list on the remote
3782 target end. Delete GDB-side threads no longer found on the
3784 for (thread_info
*tp
: all_threads_safe ())
3786 if (!context
.contains_thread (tp
->ptid
))
3793 /* Remove any unreported fork child threads from CONTEXT so
3794 that we don't interfere with follow fork, which is where
3795 creation of such threads is handled. */
3796 remove_new_fork_children (&context
);
3798 /* And now add threads we don't know about yet to our list. */
3799 for (thread_item
&item
: context
.items
)
3801 if (item
.ptid
!= null_ptid
)
3803 /* In non-stop mode, we assume new found threads are
3804 executing until proven otherwise with a stop reply.
3805 In all-stop, we can only get here if all threads are
3807 int executing
= target_is_non_stop_p () ? 1 : 0;
3809 remote_notice_new_inferior (item
.ptid
, executing
);
3811 thread_info
*tp
= find_thread_ptid (item
.ptid
);
3812 remote_thread_info
*info
= get_remote_thread_info (tp
);
3813 info
->core
= item
.core
;
3814 info
->extra
= std::move (item
.extra
);
3815 info
->name
= std::move (item
.name
);
3816 info
->thread_handle
= std::move (item
.thread_handle
);
3823 /* If no thread listing method is supported, then query whether
3824 each known thread is alive, one by one, with the T packet.
3825 If the target doesn't support threads at all, then this is a
3826 no-op. See remote_thread_alive. */
3832 * Collect a descriptive string about the given thread.
3833 * The target may say anything it wants to about the thread
3834 * (typically info about its blocked / runnable state, name, etc.).
3835 * This string will appear in the info threads display.
3837 * Optional: targets are not required to implement this function.
3841 remote_target::extra_thread_info (thread_info
*tp
)
3843 struct remote_state
*rs
= get_remote_state ();
3846 struct gdb_ext_thread_info threadinfo
;
3848 if (rs
->remote_desc
== 0) /* paranoia */
3849 internal_error (__FILE__
, __LINE__
,
3850 _("remote_threads_extra_info"));
3852 if (tp
->ptid
== magic_null_ptid
3853 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
3854 /* This is the main thread which was added by GDB. The remote
3855 server doesn't know about it. */
3858 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
3860 /* If already have cached info, use it. */
3861 if (!extra
.empty ())
3862 return extra
.c_str ();
3864 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3866 /* If we're using qXfer:threads:read, then the extra info is
3867 included in the XML. So if we didn't have anything cached,
3868 it's because there's really no extra info. */
3872 if (rs
->use_threadextra_query
)
3874 char *b
= rs
->buf
.data ();
3875 char *endb
= b
+ get_remote_packet_size ();
3877 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3879 write_ptid (b
, endb
, tp
->ptid
);
3882 getpkt (&rs
->buf
, 0);
3883 if (rs
->buf
[0] != 0)
3885 extra
.resize (strlen (rs
->buf
.data ()) / 2);
3886 hex2bin (rs
->buf
.data (), (gdb_byte
*) &extra
[0], extra
.size ());
3887 return extra
.c_str ();
3891 /* If the above query fails, fall back to the old method. */
3892 rs
->use_threadextra_query
= 0;
3893 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3894 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3895 int_to_threadref (&id
, tp
->ptid
.lwp ());
3896 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3897 if (threadinfo
.active
)
3899 if (*threadinfo
.shortname
)
3900 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
3901 if (*threadinfo
.display
)
3903 if (!extra
.empty ())
3905 string_appendf (extra
, " State: %s", threadinfo
.display
);
3907 if (*threadinfo
.more_display
)
3909 if (!extra
.empty ())
3911 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
3913 return extra
.c_str ();
3920 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
3921 struct static_tracepoint_marker
*marker
)
3923 struct remote_state
*rs
= get_remote_state ();
3924 char *p
= rs
->buf
.data ();
3926 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3928 p
+= hexnumstr (p
, addr
);
3930 getpkt (&rs
->buf
, 0);
3931 p
= rs
->buf
.data ();
3934 error (_("Remote failure reply: %s"), p
);
3938 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
3945 std::vector
<static_tracepoint_marker
>
3946 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
3948 struct remote_state
*rs
= get_remote_state ();
3949 std::vector
<static_tracepoint_marker
> markers
;
3951 static_tracepoint_marker marker
;
3953 /* Ask for a first packet of static tracepoint marker
3956 getpkt (&rs
->buf
, 0);
3957 p
= rs
->buf
.data ();
3959 error (_("Remote failure reply: %s"), p
);
3965 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
3967 if (strid
== NULL
|| marker
.str_id
== strid
)
3968 markers
.push_back (std::move (marker
));
3970 while (*p
++ == ','); /* comma-separated list */
3971 /* Ask for another packet of static tracepoint definition. */
3973 getpkt (&rs
->buf
, 0);
3974 p
= rs
->buf
.data ();
3981 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3984 remote_target::get_ada_task_ptid (long lwp
, long thread
)
3986 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
3990 /* Restart the remote side; this is an extended protocol operation. */
3993 remote_target::extended_remote_restart ()
3995 struct remote_state
*rs
= get_remote_state ();
3997 /* Send the restart command; for reasons I don't understand the
3998 remote side really expects a number after the "R". */
3999 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "R%x", 0);
4002 remote_fileio_reset ();
4005 /* Clean up connection to a remote debugger. */
4008 remote_target::close ()
4010 /* Make sure we leave stdin registered in the event loop. */
4013 /* We don't have a connection to the remote stub anymore. Get rid
4014 of all the inferiors and their threads we were controlling.
4015 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
4016 will be unable to find the thread corresponding to (pid, 0, 0). */
4017 inferior_ptid
= null_ptid
;
4018 discard_all_inferiors ();
4020 trace_reset_local_state ();
4025 remote_target::~remote_target ()
4027 struct remote_state
*rs
= get_remote_state ();
4029 /* Check for NULL because we may get here with a partially
4030 constructed target/connection. */
4031 if (rs
->remote_desc
== nullptr)
4034 serial_close (rs
->remote_desc
);
4036 /* We are destroying the remote target, so we should discard
4037 everything of this target. */
4038 discard_pending_stop_replies_in_queue ();
4040 if (rs
->remote_async_inferior_event_token
)
4041 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4043 delete rs
->notif_state
;
4046 /* Query the remote side for the text, data and bss offsets. */
4049 remote_target::get_offsets ()
4051 struct remote_state
*rs
= get_remote_state ();
4054 int lose
, num_segments
= 0, do_sections
, do_segments
;
4055 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4056 struct section_offsets
*offs
;
4057 struct symfile_segment_data
*data
;
4059 if (symfile_objfile
== NULL
)
4062 putpkt ("qOffsets");
4063 getpkt (&rs
->buf
, 0);
4064 buf
= rs
->buf
.data ();
4066 if (buf
[0] == '\000')
4067 return; /* Return silently. Stub doesn't support
4071 warning (_("Remote failure reply: %s"), buf
);
4075 /* Pick up each field in turn. This used to be done with scanf, but
4076 scanf will make trouble if CORE_ADDR size doesn't match
4077 conversion directives correctly. The following code will work
4078 with any size of CORE_ADDR. */
4079 text_addr
= data_addr
= bss_addr
= 0;
4083 if (startswith (ptr
, "Text="))
4086 /* Don't use strtol, could lose on big values. */
4087 while (*ptr
&& *ptr
!= ';')
4088 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4090 if (startswith (ptr
, ";Data="))
4093 while (*ptr
&& *ptr
!= ';')
4094 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4099 if (!lose
&& startswith (ptr
, ";Bss="))
4102 while (*ptr
&& *ptr
!= ';')
4103 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4105 if (bss_addr
!= data_addr
)
4106 warning (_("Target reported unsupported offsets: %s"), buf
);
4111 else if (startswith (ptr
, "TextSeg="))
4114 /* Don't use strtol, could lose on big values. */
4115 while (*ptr
&& *ptr
!= ';')
4116 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4119 if (startswith (ptr
, ";DataSeg="))
4122 while (*ptr
&& *ptr
!= ';')
4123 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4131 error (_("Malformed response to offset query, %s"), buf
);
4132 else if (*ptr
!= '\0')
4133 warning (_("Target reported unsupported offsets: %s"), buf
);
4135 offs
= ((struct section_offsets
*)
4136 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
4137 memcpy (offs
, symfile_objfile
->section_offsets
,
4138 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
4140 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
4141 do_segments
= (data
!= NULL
);
4142 do_sections
= num_segments
== 0;
4144 if (num_segments
> 0)
4146 segments
[0] = text_addr
;
4147 segments
[1] = data_addr
;
4149 /* If we have two segments, we can still try to relocate everything
4150 by assuming that the .text and .data offsets apply to the whole
4151 text and data segments. Convert the offsets given in the packet
4152 to base addresses for symfile_map_offsets_to_segments. */
4153 else if (data
&& data
->num_segments
== 2)
4155 segments
[0] = data
->segment_bases
[0] + text_addr
;
4156 segments
[1] = data
->segment_bases
[1] + data_addr
;
4159 /* If the object file has only one segment, assume that it is text
4160 rather than data; main programs with no writable data are rare,
4161 but programs with no code are useless. Of course the code might
4162 have ended up in the data segment... to detect that we would need
4163 the permissions here. */
4164 else if (data
&& data
->num_segments
== 1)
4166 segments
[0] = data
->segment_bases
[0] + text_addr
;
4169 /* There's no way to relocate by segment. */
4175 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
4176 offs
, num_segments
, segments
);
4178 if (ret
== 0 && !do_sections
)
4179 error (_("Can not handle qOffsets TextSeg "
4180 "response with this symbol file"));
4187 free_symfile_segment_data (data
);
4191 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
4193 /* This is a temporary kludge to force data and bss to use the
4194 same offsets because that's what nlmconv does now. The real
4195 solution requires changes to the stub and remote.c that I
4196 don't have time to do right now. */
4198 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
4199 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
4202 objfile_relocate (symfile_objfile
, offs
);
4205 /* Send interrupt_sequence to remote target. */
4208 remote_target::send_interrupt_sequence ()
4210 struct remote_state
*rs
= get_remote_state ();
4212 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4213 remote_serial_write ("\x03", 1);
4214 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4215 serial_send_break (rs
->remote_desc
);
4216 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4218 serial_send_break (rs
->remote_desc
);
4219 remote_serial_write ("g", 1);
4222 internal_error (__FILE__
, __LINE__
,
4223 _("Invalid value for interrupt_sequence_mode: %s."),
4224 interrupt_sequence_mode
);
4228 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4229 and extract the PTID. Returns NULL_PTID if not found. */
4232 stop_reply_extract_thread (char *stop_reply
)
4234 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4238 /* Txx r:val ; r:val (...) */
4241 /* Look for "register" named "thread". */
4246 p1
= strchr (p
, ':');
4250 if (strncmp (p
, "thread", p1
- p
) == 0)
4251 return read_ptid (++p1
, &p
);
4253 p1
= strchr (p
, ';');
4265 /* Determine the remote side's current thread. If we have a stop
4266 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4267 "thread" register we can extract the current thread from. If not,
4268 ask the remote which is the current thread with qC. The former
4269 method avoids a roundtrip. */
4272 remote_target::get_current_thread (char *wait_status
)
4274 ptid_t ptid
= null_ptid
;
4276 /* Note we don't use remote_parse_stop_reply as that makes use of
4277 the target architecture, which we haven't yet fully determined at
4279 if (wait_status
!= NULL
)
4280 ptid
= stop_reply_extract_thread (wait_status
);
4281 if (ptid
== null_ptid
)
4282 ptid
= remote_current_thread (inferior_ptid
);
4287 /* Query the remote target for which is the current thread/process,
4288 add it to our tables, and update INFERIOR_PTID. The caller is
4289 responsible for setting the state such that the remote end is ready
4290 to return the current thread.
4292 This function is called after handling the '?' or 'vRun' packets,
4293 whose response is a stop reply from which we can also try
4294 extracting the thread. If the target doesn't support the explicit
4295 qC query, we infer the current thread from that stop reply, passed
4296 in in WAIT_STATUS, which may be NULL. */
4299 remote_target::add_current_inferior_and_thread (char *wait_status
)
4301 struct remote_state
*rs
= get_remote_state ();
4302 bool fake_pid_p
= false;
4304 inferior_ptid
= null_ptid
;
4306 /* Now, if we have thread information, update inferior_ptid. */
4307 ptid_t curr_ptid
= get_current_thread (wait_status
);
4309 if (curr_ptid
!= null_ptid
)
4311 if (!remote_multi_process_p (rs
))
4316 /* Without this, some commands which require an active target
4317 (such as kill) won't work. This variable serves (at least)
4318 double duty as both the pid of the target process (if it has
4319 such), and as a flag indicating that a target is active. */
4320 curr_ptid
= magic_null_ptid
;
4324 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4326 /* Add the main thread and switch to it. Don't try reading
4327 registers yet, since we haven't fetched the target description
4329 thread_info
*tp
= add_thread_silent (curr_ptid
);
4330 switch_to_thread_no_regs (tp
);
4333 /* Print info about a thread that was found already stopped on
4337 print_one_stopped_thread (struct thread_info
*thread
)
4339 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
4341 switch_to_thread (thread
);
4342 thread
->suspend
.stop_pc
= get_frame_pc (get_current_frame ());
4343 set_current_sal_from_frame (get_current_frame ());
4345 thread
->suspend
.waitstatus_pending_p
= 0;
4347 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
4349 enum gdb_signal sig
= ws
->value
.sig
;
4351 if (signal_print_state (sig
))
4352 gdb::observers::signal_received
.notify (sig
);
4354 gdb::observers::normal_stop
.notify (NULL
, 1);
4357 /* Process all initial stop replies the remote side sent in response
4358 to the ? packet. These indicate threads that were already stopped
4359 on initial connection. We mark these threads as stopped and print
4360 their current frame before giving the user the prompt. */
4363 remote_target::process_initial_stop_replies (int from_tty
)
4365 int pending_stop_replies
= stop_reply_queue_length ();
4366 struct thread_info
*selected
= NULL
;
4367 struct thread_info
*lowest_stopped
= NULL
;
4368 struct thread_info
*first
= NULL
;
4370 /* Consume the initial pending events. */
4371 while (pending_stop_replies
-- > 0)
4373 ptid_t waiton_ptid
= minus_one_ptid
;
4375 struct target_waitstatus ws
;
4376 int ignore_event
= 0;
4378 memset (&ws
, 0, sizeof (ws
));
4379 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4381 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4385 case TARGET_WAITKIND_IGNORE
:
4386 case TARGET_WAITKIND_NO_RESUMED
:
4387 case TARGET_WAITKIND_SIGNALLED
:
4388 case TARGET_WAITKIND_EXITED
:
4389 /* We shouldn't see these, but if we do, just ignore. */
4391 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
4395 case TARGET_WAITKIND_EXECD
:
4396 xfree (ws
.value
.execd_pathname
);
4405 struct thread_info
*evthread
= find_thread_ptid (event_ptid
);
4407 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4409 enum gdb_signal sig
= ws
.value
.sig
;
4411 /* Stubs traditionally report SIGTRAP as initial signal,
4412 instead of signal 0. Suppress it. */
4413 if (sig
== GDB_SIGNAL_TRAP
)
4415 evthread
->suspend
.stop_signal
= sig
;
4419 evthread
->suspend
.waitstatus
= ws
;
4421 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4422 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4423 evthread
->suspend
.waitstatus_pending_p
= 1;
4425 set_executing (event_ptid
, 0);
4426 set_running (event_ptid
, 0);
4427 get_remote_thread_info (evthread
)->vcont_resumed
= 0;
4430 /* "Notice" the new inferiors before anything related to
4431 registers/memory. */
4432 for (inferior
*inf
: all_non_exited_inferiors ())
4434 inf
->needs_setup
= 1;
4438 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4439 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4444 /* If all-stop on top of non-stop, pause all threads. Note this
4445 records the threads' stop pc, so must be done after "noticing"
4449 stop_all_threads ();
4451 /* If all threads of an inferior were already stopped, we
4452 haven't setup the inferior yet. */
4453 for (inferior
*inf
: all_non_exited_inferiors ())
4455 if (inf
->needs_setup
)
4457 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4458 switch_to_thread_no_regs (thread
);
4464 /* Now go over all threads that are stopped, and print their current
4465 frame. If all-stop, then if there's a signalled thread, pick
4467 for (thread_info
*thread
: all_non_exited_threads ())
4473 thread
->set_running (false);
4474 else if (thread
->state
!= THREAD_STOPPED
)
4477 if (selected
== NULL
4478 && thread
->suspend
.waitstatus_pending_p
)
4481 if (lowest_stopped
== NULL
4482 || thread
->inf
->num
< lowest_stopped
->inf
->num
4483 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4484 lowest_stopped
= thread
;
4487 print_one_stopped_thread (thread
);
4490 /* In all-stop, we only print the status of one thread, and leave
4491 others with their status pending. */
4494 thread_info
*thread
= selected
;
4496 thread
= lowest_stopped
;
4500 print_one_stopped_thread (thread
);
4503 /* For "info program". */
4504 thread_info
*thread
= inferior_thread ();
4505 if (thread
->state
== THREAD_STOPPED
)
4506 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
4509 /* Start the remote connection and sync state. */
4512 remote_target::start_remote (int from_tty
, int extended_p
)
4514 struct remote_state
*rs
= get_remote_state ();
4515 struct packet_config
*noack_config
;
4516 char *wait_status
= NULL
;
4518 /* Signal other parts that we're going through the initial setup,
4519 and so things may not be stable yet. E.g., we don't try to
4520 install tracepoints until we've relocated symbols. Also, a
4521 Ctrl-C before we're connected and synced up can't interrupt the
4522 target. Instead, it offers to drop the (potentially wedged)
4524 rs
->starting_up
= 1;
4528 if (interrupt_on_connect
)
4529 send_interrupt_sequence ();
4531 /* Ack any packet which the remote side has already sent. */
4532 remote_serial_write ("+", 1);
4534 /* The first packet we send to the target is the optional "supported
4535 packets" request. If the target can answer this, it will tell us
4536 which later probes to skip. */
4537 remote_query_supported ();
4539 /* If the stub wants to get a QAllow, compose one and send it. */
4540 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4543 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4544 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4545 as a reply to known packet. For packet "vFile:setfs:" it is an
4546 invalid reply and GDB would return error in
4547 remote_hostio_set_filesystem, making remote files access impossible.
4548 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4549 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4551 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4553 putpkt (v_mustreplyempty
);
4554 getpkt (&rs
->buf
, 0);
4555 if (strcmp (rs
->buf
.data (), "OK") == 0)
4556 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4557 else if (strcmp (rs
->buf
.data (), "") != 0)
4558 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4562 /* Next, we possibly activate noack mode.
4564 If the QStartNoAckMode packet configuration is set to AUTO,
4565 enable noack mode if the stub reported a wish for it with
4568 If set to TRUE, then enable noack mode even if the stub didn't
4569 report it in qSupported. If the stub doesn't reply OK, the
4570 session ends with an error.
4572 If FALSE, then don't activate noack mode, regardless of what the
4573 stub claimed should be the default with qSupported. */
4575 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4576 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4578 putpkt ("QStartNoAckMode");
4579 getpkt (&rs
->buf
, 0);
4580 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4586 /* Tell the remote that we are using the extended protocol. */
4588 getpkt (&rs
->buf
, 0);
4591 /* Let the target know which signals it is allowed to pass down to
4593 update_signals_program_target ();
4595 /* Next, if the target can specify a description, read it. We do
4596 this before anything involving memory or registers. */
4597 target_find_description ();
4599 /* Next, now that we know something about the target, update the
4600 address spaces in the program spaces. */
4601 update_address_spaces ();
4603 /* On OSs where the list of libraries is global to all
4604 processes, we fetch them early. */
4605 if (gdbarch_has_global_solist (target_gdbarch ()))
4606 solib_add (NULL
, from_tty
, auto_solib_add
);
4608 if (target_is_non_stop_p ())
4610 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4611 error (_("Non-stop mode requested, but remote "
4612 "does not support non-stop"));
4614 putpkt ("QNonStop:1");
4615 getpkt (&rs
->buf
, 0);
4617 if (strcmp (rs
->buf
.data (), "OK") != 0)
4618 error (_("Remote refused setting non-stop mode with: %s"),
4621 /* Find about threads and processes the stub is already
4622 controlling. We default to adding them in the running state.
4623 The '?' query below will then tell us about which threads are
4625 this->update_thread_list ();
4627 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4629 /* Don't assume that the stub can operate in all-stop mode.
4630 Request it explicitly. */
4631 putpkt ("QNonStop:0");
4632 getpkt (&rs
->buf
, 0);
4634 if (strcmp (rs
->buf
.data (), "OK") != 0)
4635 error (_("Remote refused setting all-stop mode with: %s"),
4639 /* Upload TSVs regardless of whether the target is running or not. The
4640 remote stub, such as GDBserver, may have some predefined or builtin
4641 TSVs, even if the target is not running. */
4642 if (get_trace_status (current_trace_status ()) != -1)
4644 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4646 upload_trace_state_variables (&uploaded_tsvs
);
4647 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4650 /* Check whether the target is running now. */
4652 getpkt (&rs
->buf
, 0);
4654 if (!target_is_non_stop_p ())
4656 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4659 error (_("The target is not running (try extended-remote?)"));
4661 /* We're connected, but not running. Drop out before we
4662 call start_remote. */
4663 rs
->starting_up
= 0;
4668 /* Save the reply for later. */
4669 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4670 strcpy (wait_status
, rs
->buf
.data ());
4673 /* Fetch thread list. */
4674 target_update_thread_list ();
4676 /* Let the stub know that we want it to return the thread. */
4677 set_continue_thread (minus_one_ptid
);
4679 if (thread_count () == 0)
4681 /* Target has no concept of threads at all. GDB treats
4682 non-threaded target as single-threaded; add a main
4684 add_current_inferior_and_thread (wait_status
);
4688 /* We have thread information; select the thread the target
4689 says should be current. If we're reconnecting to a
4690 multi-threaded program, this will ideally be the thread
4691 that last reported an event before GDB disconnected. */
4692 inferior_ptid
= get_current_thread (wait_status
);
4693 if (inferior_ptid
== null_ptid
)
4695 /* Odd... The target was able to list threads, but not
4696 tell us which thread was current (no "thread"
4697 register in T stop reply?). Just pick the first
4698 thread in the thread list then. */
4701 fprintf_unfiltered (gdb_stdlog
,
4702 "warning: couldn't determine remote "
4703 "current thread; picking first in list.\n");
4705 inferior_ptid
= inferior_list
->thread_list
->ptid
;
4709 /* init_wait_for_inferior should be called before get_offsets in order
4710 to manage `inserted' flag in bp loc in a correct state.
4711 breakpoint_init_inferior, called from init_wait_for_inferior, set
4712 `inserted' flag to 0, while before breakpoint_re_set, called from
4713 start_remote, set `inserted' flag to 1. In the initialization of
4714 inferior, breakpoint_init_inferior should be called first, and then
4715 breakpoint_re_set can be called. If this order is broken, state of
4716 `inserted' flag is wrong, and cause some problems on breakpoint
4718 init_wait_for_inferior ();
4720 get_offsets (); /* Get text, data & bss offsets. */
4722 /* If we could not find a description using qXfer, and we know
4723 how to do it some other way, try again. This is not
4724 supported for non-stop; it could be, but it is tricky if
4725 there are no stopped threads when we connect. */
4726 if (remote_read_description_p (this)
4727 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4729 target_clear_description ();
4730 target_find_description ();
4733 /* Use the previously fetched status. */
4734 gdb_assert (wait_status
!= NULL
);
4735 strcpy (rs
->buf
.data (), wait_status
);
4736 rs
->cached_wait_status
= 1;
4738 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4742 /* Clear WFI global state. Do this before finding about new
4743 threads and inferiors, and setting the current inferior.
4744 Otherwise we would clear the proceed status of the current
4745 inferior when we want its stop_soon state to be preserved
4746 (see notice_new_inferior). */
4747 init_wait_for_inferior ();
4749 /* In non-stop, we will either get an "OK", meaning that there
4750 are no stopped threads at this time; or, a regular stop
4751 reply. In the latter case, there may be more than one thread
4752 stopped --- we pull them all out using the vStopped
4754 if (strcmp (rs
->buf
.data (), "OK") != 0)
4756 struct notif_client
*notif
= ¬if_client_stop
;
4758 /* remote_notif_get_pending_replies acks this one, and gets
4760 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4761 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4762 remote_notif_get_pending_events (notif
);
4765 if (thread_count () == 0)
4768 error (_("The target is not running (try extended-remote?)"));
4770 /* We're connected, but not running. Drop out before we
4771 call start_remote. */
4772 rs
->starting_up
= 0;
4776 /* In non-stop mode, any cached wait status will be stored in
4777 the stop reply queue. */
4778 gdb_assert (wait_status
== NULL
);
4780 /* Report all signals during attach/startup. */
4783 /* If there are already stopped threads, mark them stopped and
4784 report their stops before giving the prompt to the user. */
4785 process_initial_stop_replies (from_tty
);
4787 if (target_can_async_p ())
4791 /* If we connected to a live target, do some additional setup. */
4792 if (target_has_execution
)
4794 if (symfile_objfile
) /* No use without a symbol-file. */
4795 remote_check_symbols ();
4798 /* Possibly the target has been engaged in a trace run started
4799 previously; find out where things are at. */
4800 if (get_trace_status (current_trace_status ()) != -1)
4802 struct uploaded_tp
*uploaded_tps
= NULL
;
4804 if (current_trace_status ()->running
)
4805 printf_filtered (_("Trace is already running on the target.\n"));
4807 upload_tracepoints (&uploaded_tps
);
4809 merge_uploaded_tracepoints (&uploaded_tps
);
4812 /* Possibly the target has been engaged in a btrace record started
4813 previously; find out where things are at. */
4814 remote_btrace_maybe_reopen ();
4816 /* The thread and inferior lists are now synchronized with the
4817 target, our symbols have been relocated, and we're merged the
4818 target's tracepoints with ours. We're done with basic start
4820 rs
->starting_up
= 0;
4822 /* Maybe breakpoints are global and need to be inserted now. */
4823 if (breakpoints_should_be_inserted_now ())
4824 insert_breakpoints ();
4827 /* Open a connection to a remote debugger.
4828 NAME is the filename used for communication. */
4831 remote_target::open (const char *name
, int from_tty
)
4833 open_1 (name
, from_tty
, 0);
4836 /* Open a connection to a remote debugger using the extended
4837 remote gdb protocol. NAME is the filename used for communication. */
4840 extended_remote_target::open (const char *name
, int from_tty
)
4842 open_1 (name
, from_tty
, 1 /*extended_p */);
4845 /* Reset all packets back to "unknown support". Called when opening a
4846 new connection to a remote target. */
4849 reset_all_packet_configs_support (void)
4853 for (i
= 0; i
< PACKET_MAX
; i
++)
4854 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4857 /* Initialize all packet configs. */
4860 init_all_packet_configs (void)
4864 for (i
= 0; i
< PACKET_MAX
; i
++)
4866 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4867 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4871 /* Symbol look-up. */
4874 remote_target::remote_check_symbols ()
4879 /* The remote side has no concept of inferiors that aren't running
4880 yet, it only knows about running processes. If we're connected
4881 but our current inferior is not running, we should not invite the
4882 remote target to request symbol lookups related to its
4883 (unrelated) current process. */
4884 if (!target_has_execution
)
4887 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4890 /* Make sure the remote is pointing at the right process. Note
4891 there's no way to select "no process". */
4892 set_general_process ();
4894 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4895 because we need both at the same time. */
4896 gdb::char_vector
msg (get_remote_packet_size ());
4897 gdb::char_vector
reply (get_remote_packet_size ());
4899 /* Invite target to request symbol lookups. */
4901 putpkt ("qSymbol::");
4903 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4905 while (startswith (reply
.data (), "qSymbol:"))
4907 struct bound_minimal_symbol sym
;
4910 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
4913 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
4914 if (sym
.minsym
== NULL
)
4915 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
4919 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4920 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4922 /* If this is a function address, return the start of code
4923 instead of any data function descriptor. */
4924 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4926 current_top_target ());
4928 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
4929 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4932 putpkt (msg
.data ());
4937 static struct serial
*
4938 remote_serial_open (const char *name
)
4940 static int udp_warning
= 0;
4942 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4943 of in ser-tcp.c, because it is the remote protocol assuming that the
4944 serial connection is reliable and not the serial connection promising
4946 if (!udp_warning
&& startswith (name
, "udp:"))
4948 warning (_("The remote protocol may be unreliable over UDP.\n"
4949 "Some events may be lost, rendering further debugging "
4954 return serial_open (name
);
4957 /* Inform the target of our permission settings. The permission flags
4958 work without this, but if the target knows the settings, it can do
4959 a couple things. First, it can add its own check, to catch cases
4960 that somehow manage to get by the permissions checks in target
4961 methods. Second, if the target is wired to disallow particular
4962 settings (for instance, a system in the field that is not set up to
4963 be able to stop at a breakpoint), it can object to any unavailable
4967 remote_target::set_permissions ()
4969 struct remote_state
*rs
= get_remote_state ();
4971 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
4972 "WriteReg:%x;WriteMem:%x;"
4973 "InsertBreak:%x;InsertTrace:%x;"
4974 "InsertFastTrace:%x;Stop:%x",
4975 may_write_registers
, may_write_memory
,
4976 may_insert_breakpoints
, may_insert_tracepoints
,
4977 may_insert_fast_tracepoints
, may_stop
);
4979 getpkt (&rs
->buf
, 0);
4981 /* If the target didn't like the packet, warn the user. Do not try
4982 to undo the user's settings, that would just be maddening. */
4983 if (strcmp (rs
->buf
.data (), "OK") != 0)
4984 warning (_("Remote refused setting permissions with: %s"),
4988 /* This type describes each known response to the qSupported
4990 struct protocol_feature
4992 /* The name of this protocol feature. */
4995 /* The default for this protocol feature. */
4996 enum packet_support default_support
;
4998 /* The function to call when this feature is reported, or after
4999 qSupported processing if the feature is not supported.
5000 The first argument points to this structure. The second
5001 argument indicates whether the packet requested support be
5002 enabled, disabled, or probed (or the default, if this function
5003 is being called at the end of processing and this feature was
5004 not reported). The third argument may be NULL; if not NULL, it
5005 is a NUL-terminated string taken from the packet following
5006 this feature's name and an equals sign. */
5007 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5008 enum packet_support
, const char *);
5010 /* The corresponding packet for this feature. Only used if
5011 FUNC is remote_supported_packet. */
5016 remote_supported_packet (remote_target
*remote
,
5017 const struct protocol_feature
*feature
,
5018 enum packet_support support
,
5019 const char *argument
)
5023 warning (_("Remote qSupported response supplied an unexpected value for"
5024 " \"%s\"."), feature
->name
);
5028 remote_protocol_packets
[feature
->packet
].support
= support
;
5032 remote_target::remote_packet_size (const protocol_feature
*feature
,
5033 enum packet_support support
, const char *value
)
5035 struct remote_state
*rs
= get_remote_state ();
5040 if (support
!= PACKET_ENABLE
)
5043 if (value
== NULL
|| *value
== '\0')
5045 warning (_("Remote target reported \"%s\" without a size."),
5051 packet_size
= strtol (value
, &value_end
, 16);
5052 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5054 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5055 feature
->name
, value
);
5059 /* Record the new maximum packet size. */
5060 rs
->explicit_packet_size
= packet_size
;
5064 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5065 enum packet_support support
, const char *value
)
5067 remote
->remote_packet_size (feature
, support
, value
);
5070 static const struct protocol_feature remote_protocol_features
[] = {
5071 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5072 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5073 PACKET_qXfer_auxv
},
5074 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5075 PACKET_qXfer_exec_file
},
5076 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5077 PACKET_qXfer_features
},
5078 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5079 PACKET_qXfer_libraries
},
5080 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5081 PACKET_qXfer_libraries_svr4
},
5082 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5083 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5084 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5085 PACKET_qXfer_memory_map
},
5086 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
5087 PACKET_qXfer_spu_read
},
5088 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
5089 PACKET_qXfer_spu_write
},
5090 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5091 PACKET_qXfer_osdata
},
5092 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5093 PACKET_qXfer_threads
},
5094 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5095 PACKET_qXfer_traceframe_info
},
5096 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5097 PACKET_QPassSignals
},
5098 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5099 PACKET_QCatchSyscalls
},
5100 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5101 PACKET_QProgramSignals
},
5102 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5103 PACKET_QSetWorkingDir
},
5104 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5105 PACKET_QStartupWithShell
},
5106 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5107 PACKET_QEnvironmentHexEncoded
},
5108 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5109 PACKET_QEnvironmentReset
},
5110 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5111 PACKET_QEnvironmentUnset
},
5112 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5113 PACKET_QStartNoAckMode
},
5114 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5115 PACKET_multiprocess_feature
},
5116 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5117 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5118 PACKET_qXfer_siginfo_read
},
5119 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5120 PACKET_qXfer_siginfo_write
},
5121 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5122 PACKET_ConditionalTracepoints
},
5123 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5124 PACKET_ConditionalBreakpoints
},
5125 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5126 PACKET_BreakpointCommands
},
5127 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5128 PACKET_FastTracepoints
},
5129 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5130 PACKET_StaticTracepoints
},
5131 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5132 PACKET_InstallInTrace
},
5133 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5134 PACKET_DisconnectedTracing_feature
},
5135 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5137 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5139 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5140 PACKET_TracepointSource
},
5141 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5143 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5144 PACKET_EnableDisableTracepoints_feature
},
5145 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5146 PACKET_qXfer_fdpic
},
5147 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5149 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5150 PACKET_QDisableRandomization
},
5151 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5152 { "QTBuffer:size", PACKET_DISABLE
,
5153 remote_supported_packet
, PACKET_QTBuffer_size
},
5154 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5155 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5156 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5157 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5158 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5159 PACKET_qXfer_btrace
},
5160 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5161 PACKET_qXfer_btrace_conf
},
5162 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5163 PACKET_Qbtrace_conf_bts_size
},
5164 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5165 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5166 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5167 PACKET_fork_event_feature
},
5168 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5169 PACKET_vfork_event_feature
},
5170 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5171 PACKET_exec_event_feature
},
5172 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5173 PACKET_Qbtrace_conf_pt_size
},
5174 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5175 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5176 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5179 static char *remote_support_xml
;
5181 /* Register string appended to "xmlRegisters=" in qSupported query. */
5184 register_remote_support_xml (const char *xml
)
5186 #if defined(HAVE_LIBEXPAT)
5187 if (remote_support_xml
== NULL
)
5188 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5191 char *copy
= xstrdup (remote_support_xml
+ 13);
5192 char *p
= strtok (copy
, ",");
5196 if (strcmp (p
, xml
) == 0)
5203 while ((p
= strtok (NULL
, ",")) != NULL
);
5206 remote_support_xml
= reconcat (remote_support_xml
,
5207 remote_support_xml
, ",", xml
,
5214 remote_query_supported_append (std::string
*msg
, const char *append
)
5218 msg
->append (append
);
5222 remote_target::remote_query_supported ()
5224 struct remote_state
*rs
= get_remote_state ();
5227 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5229 /* The packet support flags are handled differently for this packet
5230 than for most others. We treat an error, a disabled packet, and
5231 an empty response identically: any features which must be reported
5232 to be used will be automatically disabled. An empty buffer
5233 accomplishes this, since that is also the representation for a list
5234 containing no features. */
5237 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5241 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5242 remote_query_supported_append (&q
, "multiprocess+");
5244 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5245 remote_query_supported_append (&q
, "swbreak+");
5246 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5247 remote_query_supported_append (&q
, "hwbreak+");
5249 remote_query_supported_append (&q
, "qRelocInsn+");
5251 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5252 != AUTO_BOOLEAN_FALSE
)
5253 remote_query_supported_append (&q
, "fork-events+");
5254 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5255 != AUTO_BOOLEAN_FALSE
)
5256 remote_query_supported_append (&q
, "vfork-events+");
5257 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5258 != AUTO_BOOLEAN_FALSE
)
5259 remote_query_supported_append (&q
, "exec-events+");
5261 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5262 remote_query_supported_append (&q
, "vContSupported+");
5264 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5265 remote_query_supported_append (&q
, "QThreadEvents+");
5267 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5268 remote_query_supported_append (&q
, "no-resumed+");
5270 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5271 the qSupported:xmlRegisters=i386 handling. */
5272 if (remote_support_xml
!= NULL
5273 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5274 remote_query_supported_append (&q
, remote_support_xml
);
5276 q
= "qSupported:" + q
;
5277 putpkt (q
.c_str ());
5279 getpkt (&rs
->buf
, 0);
5281 /* If an error occured, warn, but do not return - just reset the
5282 buffer to empty and go on to disable features. */
5283 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5286 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5291 memset (seen
, 0, sizeof (seen
));
5293 next
= rs
->buf
.data ();
5296 enum packet_support is_supported
;
5297 char *p
, *end
, *name_end
, *value
;
5299 /* First separate out this item from the rest of the packet. If
5300 there's another item after this, we overwrite the separator
5301 (terminated strings are much easier to work with). */
5303 end
= strchr (p
, ';');
5306 end
= p
+ strlen (p
);
5316 warning (_("empty item in \"qSupported\" response"));
5321 name_end
= strchr (p
, '=');
5324 /* This is a name=value entry. */
5325 is_supported
= PACKET_ENABLE
;
5326 value
= name_end
+ 1;
5335 is_supported
= PACKET_ENABLE
;
5339 is_supported
= PACKET_DISABLE
;
5343 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5347 warning (_("unrecognized item \"%s\" "
5348 "in \"qSupported\" response"), p
);
5354 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5355 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5357 const struct protocol_feature
*feature
;
5360 feature
= &remote_protocol_features
[i
];
5361 feature
->func (this, feature
, is_supported
, value
);
5366 /* If we increased the packet size, make sure to increase the global
5367 buffer size also. We delay this until after parsing the entire
5368 qSupported packet, because this is the same buffer we were
5370 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5371 rs
->buf
.resize (rs
->explicit_packet_size
);
5373 /* Handle the defaults for unmentioned features. */
5374 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5377 const struct protocol_feature
*feature
;
5379 feature
= &remote_protocol_features
[i
];
5380 feature
->func (this, feature
, feature
->default_support
, NULL
);
5384 /* Serial QUIT handler for the remote serial descriptor.
5386 Defers handling a Ctrl-C until we're done with the current
5387 command/response packet sequence, unless:
5389 - We're setting up the connection. Don't send a remote interrupt
5390 request, as we're not fully synced yet. Quit immediately
5393 - The target has been resumed in the foreground
5394 (target_terminal::is_ours is false) with a synchronous resume
5395 packet, and we're blocked waiting for the stop reply, thus a
5396 Ctrl-C should be immediately sent to the target.
5398 - We get a second Ctrl-C while still within the same serial read or
5399 write. In that case the serial is seemingly wedged --- offer to
5402 - We see a second Ctrl-C without target response, after having
5403 previously interrupted the target. In that case the target/stub
5404 is probably wedged --- offer to quit/disconnect.
5408 remote_target::remote_serial_quit_handler ()
5410 struct remote_state
*rs
= get_remote_state ();
5412 if (check_quit_flag ())
5414 /* If we're starting up, we're not fully synced yet. Quit
5416 if (rs
->starting_up
)
5418 else if (rs
->got_ctrlc_during_io
)
5420 if (query (_("The target is not responding to GDB commands.\n"
5421 "Stop debugging it? ")))
5422 remote_unpush_and_throw ();
5424 /* If ^C has already been sent once, offer to disconnect. */
5425 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5427 /* All-stop protocol, and blocked waiting for stop reply. Send
5428 an interrupt request. */
5429 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5430 target_interrupt ();
5432 rs
->got_ctrlc_during_io
= 1;
5436 /* The remote_target that is current while the quit handler is
5437 overridden with remote_serial_quit_handler. */
5438 static remote_target
*curr_quit_handler_target
;
5441 remote_serial_quit_handler ()
5443 curr_quit_handler_target
->remote_serial_quit_handler ();
5446 /* Remove any of the remote.c targets from target stack. Upper targets depend
5447 on it so remove them first. */
5450 remote_unpush_target (void)
5452 pop_all_targets_at_and_above (process_stratum
);
5456 remote_unpush_and_throw (void)
5458 remote_unpush_target ();
5459 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5463 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5465 remote_target
*curr_remote
= get_current_remote_target ();
5468 error (_("To open a remote debug connection, you need to specify what\n"
5469 "serial device is attached to the remote system\n"
5470 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5472 /* If we're connected to a running target, target_preopen will kill it.
5473 Ask this question first, before target_preopen has a chance to kill
5475 if (curr_remote
!= NULL
&& !have_inferiors ())
5478 && !query (_("Already connected to a remote target. Disconnect? ")))
5479 error (_("Still connected."));
5482 /* Here the possibly existing remote target gets unpushed. */
5483 target_preopen (from_tty
);
5485 remote_fileio_reset ();
5486 reopen_exec_file ();
5489 remote_target
*remote
5490 = (extended_p
? new extended_remote_target () : new remote_target ());
5491 target_ops_up
target_holder (remote
);
5493 remote_state
*rs
= remote
->get_remote_state ();
5495 /* See FIXME above. */
5496 if (!target_async_permitted
)
5497 rs
->wait_forever_enabled_p
= 1;
5499 rs
->remote_desc
= remote_serial_open (name
);
5500 if (!rs
->remote_desc
)
5501 perror_with_name (name
);
5503 if (baud_rate
!= -1)
5505 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5507 /* The requested speed could not be set. Error out to
5508 top level after closing remote_desc. Take care to
5509 set remote_desc to NULL to avoid closing remote_desc
5511 serial_close (rs
->remote_desc
);
5512 rs
->remote_desc
= NULL
;
5513 perror_with_name (name
);
5517 serial_setparity (rs
->remote_desc
, serial_parity
);
5518 serial_raw (rs
->remote_desc
);
5520 /* If there is something sitting in the buffer we might take it as a
5521 response to a command, which would be bad. */
5522 serial_flush_input (rs
->remote_desc
);
5526 puts_filtered ("Remote debugging using ");
5527 puts_filtered (name
);
5528 puts_filtered ("\n");
5531 /* Switch to using the remote target now. */
5532 push_target (std::move (target_holder
));
5534 /* Register extra event sources in the event loop. */
5535 rs
->remote_async_inferior_event_token
5536 = create_async_event_handler (remote_async_inferior_event_handler
,
5538 rs
->notif_state
= remote_notif_state_allocate (remote
);
5540 /* Reset the target state; these things will be queried either by
5541 remote_query_supported or as they are needed. */
5542 reset_all_packet_configs_support ();
5543 rs
->cached_wait_status
= 0;
5544 rs
->explicit_packet_size
= 0;
5546 rs
->extended
= extended_p
;
5547 rs
->waiting_for_stop_reply
= 0;
5548 rs
->ctrlc_pending_p
= 0;
5549 rs
->got_ctrlc_during_io
= 0;
5551 rs
->general_thread
= not_sent_ptid
;
5552 rs
->continue_thread
= not_sent_ptid
;
5553 rs
->remote_traceframe_number
= -1;
5555 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5557 /* Probe for ability to use "ThreadInfo" query, as required. */
5558 rs
->use_threadinfo_query
= 1;
5559 rs
->use_threadextra_query
= 1;
5561 rs
->readahead_cache
.invalidate ();
5563 if (target_async_permitted
)
5565 /* FIXME: cagney/1999-09-23: During the initial connection it is
5566 assumed that the target is already ready and able to respond to
5567 requests. Unfortunately remote_start_remote() eventually calls
5568 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5569 around this. Eventually a mechanism that allows
5570 wait_for_inferior() to expect/get timeouts will be
5572 rs
->wait_forever_enabled_p
= 0;
5575 /* First delete any symbols previously loaded from shared libraries. */
5576 no_shared_libraries (NULL
, 0);
5578 /* Start the remote connection. If error() or QUIT, discard this
5579 target (we'd otherwise be in an inconsistent state) and then
5580 propogate the error on up the exception chain. This ensures that
5581 the caller doesn't stumble along blindly assuming that the
5582 function succeeded. The CLI doesn't have this problem but other
5583 UI's, such as MI do.
5585 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5586 this function should return an error indication letting the
5587 caller restore the previous state. Unfortunately the command
5588 ``target remote'' is directly wired to this function making that
5589 impossible. On a positive note, the CLI side of this problem has
5590 been fixed - the function set_cmd_context() makes it possible for
5591 all the ``target ....'' commands to share a common callback
5592 function. See cli-dump.c. */
5597 remote
->start_remote (from_tty
, extended_p
);
5599 catch (const gdb_exception
&ex
)
5601 /* Pop the partially set up target - unless something else did
5602 already before throwing the exception. */
5603 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5604 remote_unpush_target ();
5609 remote_btrace_reset (rs
);
5611 if (target_async_permitted
)
5612 rs
->wait_forever_enabled_p
= 1;
5615 /* Detach the specified process. */
5618 remote_target::remote_detach_pid (int pid
)
5620 struct remote_state
*rs
= get_remote_state ();
5622 /* This should not be necessary, but the handling for D;PID in
5623 GDBserver versions prior to 8.2 incorrectly assumes that the
5624 selected process points to the same process we're detaching,
5625 leading to misbehavior (and possibly GDBserver crashing) when it
5626 does not. Since it's easy and cheap, work around it by forcing
5627 GDBserver to select GDB's current process. */
5628 set_general_process ();
5630 if (remote_multi_process_p (rs
))
5631 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5633 strcpy (rs
->buf
.data (), "D");
5636 getpkt (&rs
->buf
, 0);
5638 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5640 else if (rs
->buf
[0] == '\0')
5641 error (_("Remote doesn't know how to detach"));
5643 error (_("Can't detach process."));
5646 /* This detaches a program to which we previously attached, using
5647 inferior_ptid to identify the process. After this is done, GDB
5648 can be used to debug some other program. We better not have left
5649 any breakpoints in the target program or it'll die when it hits
5653 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5655 int pid
= inferior_ptid
.pid ();
5656 struct remote_state
*rs
= get_remote_state ();
5659 if (!target_has_execution
)
5660 error (_("No process to detach from."));
5662 target_announce_detach (from_tty
);
5664 /* Tell the remote target to detach. */
5665 remote_detach_pid (pid
);
5667 /* Exit only if this is the only active inferior. */
5668 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5669 puts_filtered (_("Ending remote debugging.\n"));
5671 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5673 /* Check to see if we are detaching a fork parent. Note that if we
5674 are detaching a fork child, tp == NULL. */
5675 is_fork_parent
= (tp
!= NULL
5676 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5678 /* If doing detach-on-fork, we don't mourn, because that will delete
5679 breakpoints that should be available for the followed inferior. */
5680 if (!is_fork_parent
)
5682 /* Save the pid as a string before mourning, since that will
5683 unpush the remote target, and we need the string after. */
5684 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5686 target_mourn_inferior (inferior_ptid
);
5687 if (print_inferior_events
)
5688 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5689 inf
->num
, infpid
.c_str ());
5693 inferior_ptid
= null_ptid
;
5694 detach_inferior (current_inferior ());
5699 remote_target::detach (inferior
*inf
, int from_tty
)
5701 remote_detach_1 (inf
, from_tty
);
5705 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5707 remote_detach_1 (inf
, from_tty
);
5710 /* Target follow-fork function for remote targets. On entry, and
5711 at return, the current inferior is the fork parent.
5713 Note that although this is currently only used for extended-remote,
5714 it is named remote_follow_fork in anticipation of using it for the
5715 remote target as well. */
5718 remote_target::follow_fork (int follow_child
, int detach_fork
)
5720 struct remote_state
*rs
= get_remote_state ();
5721 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5723 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5724 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5726 /* When following the parent and detaching the child, we detach
5727 the child here. For the case of following the child and
5728 detaching the parent, the detach is done in the target-
5729 independent follow fork code in infrun.c. We can't use
5730 target_detach when detaching an unfollowed child because
5731 the client side doesn't know anything about the child. */
5732 if (detach_fork
&& !follow_child
)
5734 /* Detach the fork child. */
5738 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5739 child_pid
= child_ptid
.pid ();
5741 remote_detach_pid (child_pid
);
5747 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5748 in the program space of the new inferior. On entry and at return the
5749 current inferior is the exec'ing inferior. INF is the new exec'd
5750 inferior, which may be the same as the exec'ing inferior unless
5751 follow-exec-mode is "new". */
5754 remote_target::follow_exec (struct inferior
*inf
, const char *execd_pathname
)
5756 /* We know that this is a target file name, so if it has the "target:"
5757 prefix we strip it off before saving it in the program space. */
5758 if (is_target_filename (execd_pathname
))
5759 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5761 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5764 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5767 remote_target::disconnect (const char *args
, int from_tty
)
5770 error (_("Argument given to \"disconnect\" when remotely debugging."));
5772 /* Make sure we unpush even the extended remote targets. Calling
5773 target_mourn_inferior won't unpush, and remote_mourn won't
5774 unpush if there is more than one inferior left. */
5775 unpush_target (this);
5776 generic_mourn_inferior ();
5779 puts_filtered ("Ending remote debugging.\n");
5782 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5783 be chatty about it. */
5786 extended_remote_target::attach (const char *args
, int from_tty
)
5788 struct remote_state
*rs
= get_remote_state ();
5790 char *wait_status
= NULL
;
5792 pid
= parse_pid_to_attach (args
);
5794 /* Remote PID can be freely equal to getpid, do not check it here the same
5795 way as in other targets. */
5797 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5798 error (_("This target does not support attaching to a process"));
5802 char *exec_file
= get_exec_file (0);
5805 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5806 target_pid_to_str (ptid_t (pid
)).c_str ());
5808 printf_unfiltered (_("Attaching to %s\n"),
5809 target_pid_to_str (ptid_t (pid
)).c_str ());
5812 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
5814 getpkt (&rs
->buf
, 0);
5816 switch (packet_ok (rs
->buf
,
5817 &remote_protocol_packets
[PACKET_vAttach
]))
5820 if (!target_is_non_stop_p ())
5822 /* Save the reply for later. */
5823 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
5824 strcpy (wait_status
, rs
->buf
.data ());
5826 else if (strcmp (rs
->buf
.data (), "OK") != 0)
5827 error (_("Attaching to %s failed with: %s"),
5828 target_pid_to_str (ptid_t (pid
)).c_str (),
5831 case PACKET_UNKNOWN
:
5832 error (_("This target does not support attaching to a process"));
5834 error (_("Attaching to %s failed"),
5835 target_pid_to_str (ptid_t (pid
)).c_str ());
5838 set_current_inferior (remote_add_inferior (false, pid
, 1, 0));
5840 inferior_ptid
= ptid_t (pid
);
5842 if (target_is_non_stop_p ())
5844 struct thread_info
*thread
;
5846 /* Get list of threads. */
5847 update_thread_list ();
5849 thread
= first_thread_of_inferior (current_inferior ());
5851 inferior_ptid
= thread
->ptid
;
5853 inferior_ptid
= ptid_t (pid
);
5855 /* Invalidate our notion of the remote current thread. */
5856 record_currthread (rs
, minus_one_ptid
);
5860 /* Now, if we have thread information, update inferior_ptid. */
5861 inferior_ptid
= remote_current_thread (inferior_ptid
);
5863 /* Add the main thread to the thread list. */
5864 thread_info
*thr
= add_thread_silent (inferior_ptid
);
5865 /* Don't consider the thread stopped until we've processed the
5866 saved stop reply. */
5867 set_executing (thr
->ptid
, true);
5870 /* Next, if the target can specify a description, read it. We do
5871 this before anything involving memory or registers. */
5872 target_find_description ();
5874 if (!target_is_non_stop_p ())
5876 /* Use the previously fetched status. */
5877 gdb_assert (wait_status
!= NULL
);
5879 if (target_can_async_p ())
5881 struct notif_event
*reply
5882 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
5884 push_stop_reply ((struct stop_reply
*) reply
);
5890 gdb_assert (wait_status
!= NULL
);
5891 strcpy (rs
->buf
.data (), wait_status
);
5892 rs
->cached_wait_status
= 1;
5896 gdb_assert (wait_status
== NULL
);
5899 /* Implementation of the to_post_attach method. */
5902 extended_remote_target::post_attach (int pid
)
5904 /* Get text, data & bss offsets. */
5907 /* In certain cases GDB might not have had the chance to start
5908 symbol lookup up until now. This could happen if the debugged
5909 binary is not using shared libraries, the vsyscall page is not
5910 present (on Linux) and the binary itself hadn't changed since the
5911 debugging process was started. */
5912 if (symfile_objfile
!= NULL
)
5913 remote_check_symbols();
5917 /* Check for the availability of vCont. This function should also check
5921 remote_target::remote_vcont_probe ()
5923 remote_state
*rs
= get_remote_state ();
5926 strcpy (rs
->buf
.data (), "vCont?");
5928 getpkt (&rs
->buf
, 0);
5929 buf
= rs
->buf
.data ();
5931 /* Make sure that the features we assume are supported. */
5932 if (startswith (buf
, "vCont"))
5935 int support_c
, support_C
;
5937 rs
->supports_vCont
.s
= 0;
5938 rs
->supports_vCont
.S
= 0;
5941 rs
->supports_vCont
.t
= 0;
5942 rs
->supports_vCont
.r
= 0;
5943 while (p
&& *p
== ';')
5946 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5947 rs
->supports_vCont
.s
= 1;
5948 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5949 rs
->supports_vCont
.S
= 1;
5950 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5952 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5954 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5955 rs
->supports_vCont
.t
= 1;
5956 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5957 rs
->supports_vCont
.r
= 1;
5959 p
= strchr (p
, ';');
5962 /* If c, and C are not all supported, we can't use vCont. Clearing
5963 BUF will make packet_ok disable the packet. */
5964 if (!support_c
|| !support_C
)
5968 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
5971 /* Helper function for building "vCont" resumptions. Write a
5972 resumption to P. ENDP points to one-passed-the-end of the buffer
5973 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5974 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5975 resumed thread should be single-stepped and/or signalled. If PTID
5976 equals minus_one_ptid, then all threads are resumed; if PTID
5977 represents a process, then all threads of the process are resumed;
5978 the thread to be stepped and/or signalled is given in the global
5982 remote_target::append_resumption (char *p
, char *endp
,
5983 ptid_t ptid
, int step
, gdb_signal siggnal
)
5985 struct remote_state
*rs
= get_remote_state ();
5987 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5988 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5990 /* GDB is willing to range step. */
5991 && use_range_stepping
5992 /* Target supports range stepping. */
5993 && rs
->supports_vCont
.r
5994 /* We don't currently support range stepping multiple
5995 threads with a wildcard (though the protocol allows it,
5996 so stubs shouldn't make an active effort to forbid
5998 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6000 struct thread_info
*tp
;
6002 if (ptid
== minus_one_ptid
)
6004 /* If we don't know about the target thread's tid, then
6005 we're resuming magic_null_ptid (see caller). */
6006 tp
= find_thread_ptid (magic_null_ptid
);
6009 tp
= find_thread_ptid (ptid
);
6010 gdb_assert (tp
!= NULL
);
6012 if (tp
->control
.may_range_step
)
6014 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6016 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6017 phex_nz (tp
->control
.step_range_start
,
6019 phex_nz (tp
->control
.step_range_end
,
6023 p
+= xsnprintf (p
, endp
- p
, ";s");
6026 p
+= xsnprintf (p
, endp
- p
, ";s");
6027 else if (siggnal
!= GDB_SIGNAL_0
)
6028 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6030 p
+= xsnprintf (p
, endp
- p
, ";c");
6032 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6036 /* All (-1) threads of process. */
6037 nptid
= ptid_t (ptid
.pid (), -1, 0);
6039 p
+= xsnprintf (p
, endp
- p
, ":");
6040 p
= write_ptid (p
, endp
, nptid
);
6042 else if (ptid
!= minus_one_ptid
)
6044 p
+= xsnprintf (p
, endp
- p
, ":");
6045 p
= write_ptid (p
, endp
, ptid
);
6051 /* Clear the thread's private info on resume. */
6054 resume_clear_thread_private_info (struct thread_info
*thread
)
6056 if (thread
->priv
!= NULL
)
6058 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6060 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6061 priv
->watch_data_address
= 0;
6065 /* Append a vCont continue-with-signal action for threads that have a
6066 non-zero stop signal. */
6069 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6072 for (thread_info
*thread
: all_non_exited_threads (ptid
))
6073 if (inferior_ptid
!= thread
->ptid
6074 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
6076 p
= append_resumption (p
, endp
, thread
->ptid
,
6077 0, thread
->suspend
.stop_signal
);
6078 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
6079 resume_clear_thread_private_info (thread
);
6085 /* Set the target running, using the packets that use Hc
6089 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6092 struct remote_state
*rs
= get_remote_state ();
6095 rs
->last_sent_signal
= siggnal
;
6096 rs
->last_sent_step
= step
;
6098 /* The c/s/C/S resume packets use Hc, so set the continue
6100 if (ptid
== minus_one_ptid
)
6101 set_continue_thread (any_thread_ptid
);
6103 set_continue_thread (ptid
);
6105 for (thread_info
*thread
: all_non_exited_threads ())
6106 resume_clear_thread_private_info (thread
);
6108 buf
= rs
->buf
.data ();
6109 if (::execution_direction
== EXEC_REVERSE
)
6111 /* We don't pass signals to the target in reverse exec mode. */
6112 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6113 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6116 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6117 error (_("Remote reverse-step not supported."));
6118 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6119 error (_("Remote reverse-continue not supported."));
6121 strcpy (buf
, step
? "bs" : "bc");
6123 else if (siggnal
!= GDB_SIGNAL_0
)
6125 buf
[0] = step
? 'S' : 'C';
6126 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6127 buf
[2] = tohex (((int) siggnal
) & 0xf);
6131 strcpy (buf
, step
? "s" : "c");
6136 /* Resume the remote inferior by using a "vCont" packet. The thread
6137 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6138 resumed thread should be single-stepped and/or signalled. If PTID
6139 equals minus_one_ptid, then all threads are resumed; the thread to
6140 be stepped and/or signalled is given in the global INFERIOR_PTID.
6141 This function returns non-zero iff it resumes the inferior.
6143 This function issues a strict subset of all possible vCont commands
6147 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6148 enum gdb_signal siggnal
)
6150 struct remote_state
*rs
= get_remote_state ();
6154 /* No reverse execution actions defined for vCont. */
6155 if (::execution_direction
== EXEC_REVERSE
)
6158 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6159 remote_vcont_probe ();
6161 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6164 p
= rs
->buf
.data ();
6165 endp
= p
+ get_remote_packet_size ();
6167 /* If we could generate a wider range of packets, we'd have to worry
6168 about overflowing BUF. Should there be a generic
6169 "multi-part-packet" packet? */
6171 p
+= xsnprintf (p
, endp
- p
, "vCont");
6173 if (ptid
== magic_null_ptid
)
6175 /* MAGIC_NULL_PTID means that we don't have any active threads,
6176 so we don't have any TID numbers the inferior will
6177 understand. Make sure to only send forms that do not specify
6179 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6181 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6183 /* Resume all threads (of all processes, or of a single
6184 process), with preference for INFERIOR_PTID. This assumes
6185 inferior_ptid belongs to the set of all threads we are about
6187 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6189 /* Step inferior_ptid, with or without signal. */
6190 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6193 /* Also pass down any pending signaled resumption for other
6194 threads not the current. */
6195 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6197 /* And continue others without a signal. */
6198 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6202 /* Scheduler locking; resume only PTID. */
6203 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6206 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6209 if (target_is_non_stop_p ())
6211 /* In non-stop, the stub replies to vCont with "OK". The stop
6212 reply will be reported asynchronously by means of a `%Stop'
6214 getpkt (&rs
->buf
, 0);
6215 if (strcmp (rs
->buf
.data (), "OK") != 0)
6216 error (_("Unexpected vCont reply in non-stop mode: %s"),
6223 /* Tell the remote machine to resume. */
6226 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6228 struct remote_state
*rs
= get_remote_state ();
6230 /* When connected in non-stop mode, the core resumes threads
6231 individually. Resuming remote threads directly in target_resume
6232 would thus result in sending one packet per thread. Instead, to
6233 minimize roundtrip latency, here we just store the resume
6234 request; the actual remote resumption will be done in
6235 target_commit_resume / remote_commit_resume, where we'll be able
6236 to do vCont action coalescing. */
6237 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6239 remote_thread_info
*remote_thr
;
6241 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6242 remote_thr
= get_remote_thread_info (inferior_ptid
);
6244 remote_thr
= get_remote_thread_info (ptid
);
6246 remote_thr
->last_resume_step
= step
;
6247 remote_thr
->last_resume_sig
= siggnal
;
6251 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6252 (explained in remote-notif.c:handle_notification) so
6253 remote_notif_process is not called. We need find a place where
6254 it is safe to start a 'vNotif' sequence. It is good to do it
6255 before resuming inferior, because inferior was stopped and no RSP
6256 traffic at that moment. */
6257 if (!target_is_non_stop_p ())
6258 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6260 rs
->last_resume_exec_dir
= ::execution_direction
;
6262 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6263 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6264 remote_resume_with_hc (ptid
, step
, siggnal
);
6266 /* We are about to start executing the inferior, let's register it
6267 with the event loop. NOTE: this is the one place where all the
6268 execution commands end up. We could alternatively do this in each
6269 of the execution commands in infcmd.c. */
6270 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6271 into infcmd.c in order to allow inferior function calls to work
6272 NOT asynchronously. */
6273 if (target_can_async_p ())
6276 /* We've just told the target to resume. The remote server will
6277 wait for the inferior to stop, and then send a stop reply. In
6278 the mean time, we can't start another command/query ourselves
6279 because the stub wouldn't be ready to process it. This applies
6280 only to the base all-stop protocol, however. In non-stop (which
6281 only supports vCont), the stub replies with an "OK", and is
6282 immediate able to process further serial input. */
6283 if (!target_is_non_stop_p ())
6284 rs
->waiting_for_stop_reply
= 1;
6287 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6289 /* Private per-inferior info for target remote processes. */
6291 struct remote_inferior
: public private_inferior
6293 /* Whether we can send a wildcard vCont for this process. */
6294 bool may_wildcard_vcont
= true;
6297 /* Get the remote private inferior data associated to INF. */
6299 static remote_inferior
*
6300 get_remote_inferior (inferior
*inf
)
6302 if (inf
->priv
== NULL
)
6303 inf
->priv
.reset (new remote_inferior
);
6305 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6308 /* Class used to track the construction of a vCont packet in the
6309 outgoing packet buffer. This is used to send multiple vCont
6310 packets if we have more actions than would fit a single packet. */
6315 explicit vcont_builder (remote_target
*remote
)
6322 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6327 /* The remote target. */
6328 remote_target
*m_remote
;
6330 /* Pointer to the first action. P points here if no action has been
6332 char *m_first_action
;
6334 /* Where the next action will be appended. */
6337 /* The end of the buffer. Must never write past this. */
6341 /* Prepare the outgoing buffer for a new vCont packet. */
6344 vcont_builder::restart ()
6346 struct remote_state
*rs
= m_remote
->get_remote_state ();
6348 m_p
= rs
->buf
.data ();
6349 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6350 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6351 m_first_action
= m_p
;
6354 /* If the vCont packet being built has any action, send it to the
6358 vcont_builder::flush ()
6360 struct remote_state
*rs
;
6362 if (m_p
== m_first_action
)
6365 rs
= m_remote
->get_remote_state ();
6366 m_remote
->putpkt (rs
->buf
);
6367 m_remote
->getpkt (&rs
->buf
, 0);
6368 if (strcmp (rs
->buf
.data (), "OK") != 0)
6369 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6372 /* The largest action is range-stepping, with its two addresses. This
6373 is more than sufficient. If a new, bigger action is created, it'll
6374 quickly trigger a failed assertion in append_resumption (and we'll
6376 #define MAX_ACTION_SIZE 200
6378 /* Append a new vCont action in the outgoing packet being built. If
6379 the action doesn't fit the packet along with previous actions, push
6380 what we've got so far to the remote end and start over a new vCont
6381 packet (with the new action). */
6384 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6386 char buf
[MAX_ACTION_SIZE
+ 1];
6388 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6389 ptid
, step
, siggnal
);
6391 /* Check whether this new action would fit in the vCont packet along
6392 with previous actions. If not, send what we've got so far and
6393 start a new vCont packet. */
6394 size_t rsize
= endp
- buf
;
6395 if (rsize
> m_endp
- m_p
)
6400 /* Should now fit. */
6401 gdb_assert (rsize
<= m_endp
- m_p
);
6404 memcpy (m_p
, buf
, rsize
);
6409 /* to_commit_resume implementation. */
6412 remote_target::commit_resume ()
6414 int any_process_wildcard
;
6415 int may_global_wildcard_vcont
;
6417 /* If connected in all-stop mode, we'd send the remote resume
6418 request directly from remote_resume. Likewise if
6419 reverse-debugging, as there are no defined vCont actions for
6420 reverse execution. */
6421 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6424 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6425 instead of resuming all threads of each process individually.
6426 However, if any thread of a process must remain halted, we can't
6427 send wildcard resumes and must send one action per thread.
6429 Care must be taken to not resume threads/processes the server
6430 side already told us are stopped, but the core doesn't know about
6431 yet, because the events are still in the vStopped notification
6434 #1 => vCont s:p1.1;c
6436 #3 <= %Stopped T05 p1.1
6441 #8 (infrun handles the stop for p1.1 and continues stepping)
6442 #9 => vCont s:p1.1;c
6444 The last vCont above would resume thread p1.2 by mistake, because
6445 the server has no idea that the event for p1.2 had not been
6448 The server side must similarly ignore resume actions for the
6449 thread that has a pending %Stopped notification (and any other
6450 threads with events pending), until GDB acks the notification
6451 with vStopped. Otherwise, e.g., the following case is
6454 #1 => g (or any other packet)
6456 #3 <= %Stopped T05 p1.2
6457 #4 => vCont s:p1.1;c
6460 Above, the server must not resume thread p1.2. GDB can't know
6461 that p1.2 stopped until it acks the %Stopped notification, and
6462 since from GDB's perspective all threads should be running, it
6465 Finally, special care must also be given to handling fork/vfork
6466 events. A (v)fork event actually tells us that two processes
6467 stopped -- the parent and the child. Until we follow the fork,
6468 we must not resume the child. Therefore, if we have a pending
6469 fork follow, we must not send a global wildcard resume action
6470 (vCont;c). We can still send process-wide wildcards though. */
6472 /* Start by assuming a global wildcard (vCont;c) is possible. */
6473 may_global_wildcard_vcont
= 1;
6475 /* And assume every process is individually wildcard-able too. */
6476 for (inferior
*inf
: all_non_exited_inferiors ())
6478 remote_inferior
*priv
= get_remote_inferior (inf
);
6480 priv
->may_wildcard_vcont
= true;
6483 /* Check for any pending events (not reported or processed yet) and
6484 disable process and global wildcard resumes appropriately. */
6485 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6487 for (thread_info
*tp
: all_non_exited_threads ())
6489 /* If a thread of a process is not meant to be resumed, then we
6490 can't wildcard that process. */
6493 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6495 /* And if we can't wildcard a process, we can't wildcard
6496 everything either. */
6497 may_global_wildcard_vcont
= 0;
6501 /* If a thread is the parent of an unfollowed fork, then we
6502 can't do a global wildcard, as that would resume the fork
6504 if (is_pending_fork_parent_thread (tp
))
6505 may_global_wildcard_vcont
= 0;
6508 /* Now let's build the vCont packet(s). Actions must be appended
6509 from narrower to wider scopes (thread -> process -> global). If
6510 we end up with too many actions for a single packet vcont_builder
6511 flushes the current vCont packet to the remote side and starts a
6513 struct vcont_builder
vcont_builder (this);
6515 /* Threads first. */
6516 for (thread_info
*tp
: all_non_exited_threads ())
6518 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6520 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
6523 gdb_assert (!thread_is_in_step_over_chain (tp
));
6525 if (!remote_thr
->last_resume_step
6526 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
6527 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6529 /* We'll send a wildcard resume instead. */
6530 remote_thr
->vcont_resumed
= 1;
6534 vcont_builder
.push_action (tp
->ptid
,
6535 remote_thr
->last_resume_step
,
6536 remote_thr
->last_resume_sig
);
6537 remote_thr
->vcont_resumed
= 1;
6540 /* Now check whether we can send any process-wide wildcard. This is
6541 to avoid sending a global wildcard in the case nothing is
6542 supposed to be resumed. */
6543 any_process_wildcard
= 0;
6545 for (inferior
*inf
: all_non_exited_inferiors ())
6547 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6549 any_process_wildcard
= 1;
6554 if (any_process_wildcard
)
6556 /* If all processes are wildcard-able, then send a single "c"
6557 action, otherwise, send an "all (-1) threads of process"
6558 continue action for each running process, if any. */
6559 if (may_global_wildcard_vcont
)
6561 vcont_builder
.push_action (minus_one_ptid
,
6562 false, GDB_SIGNAL_0
);
6566 for (inferior
*inf
: all_non_exited_inferiors ())
6568 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6570 vcont_builder
.push_action (ptid_t (inf
->pid
),
6571 false, GDB_SIGNAL_0
);
6577 vcont_builder
.flush ();
6582 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6583 thread, all threads of a remote process, or all threads of all
6587 remote_target::remote_stop_ns (ptid_t ptid
)
6589 struct remote_state
*rs
= get_remote_state ();
6590 char *p
= rs
->buf
.data ();
6591 char *endp
= p
+ get_remote_packet_size ();
6593 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6594 remote_vcont_probe ();
6596 if (!rs
->supports_vCont
.t
)
6597 error (_("Remote server does not support stopping threads"));
6599 if (ptid
== minus_one_ptid
6600 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6601 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6606 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6609 /* All (-1) threads of process. */
6610 nptid
= ptid_t (ptid
.pid (), -1, 0);
6613 /* Small optimization: if we already have a stop reply for
6614 this thread, no use in telling the stub we want this
6616 if (peek_stop_reply (ptid
))
6622 write_ptid (p
, endp
, nptid
);
6625 /* In non-stop, we get an immediate OK reply. The stop reply will
6626 come in asynchronously by notification. */
6628 getpkt (&rs
->buf
, 0);
6629 if (strcmp (rs
->buf
.data (), "OK") != 0)
6630 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6634 /* All-stop version of target_interrupt. Sends a break or a ^C to
6635 interrupt the remote target. It is undefined which thread of which
6636 process reports the interrupt. */
6639 remote_target::remote_interrupt_as ()
6641 struct remote_state
*rs
= get_remote_state ();
6643 rs
->ctrlc_pending_p
= 1;
6645 /* If the inferior is stopped already, but the core didn't know
6646 about it yet, just ignore the request. The cached wait status
6647 will be collected in remote_wait. */
6648 if (rs
->cached_wait_status
)
6651 /* Send interrupt_sequence to remote target. */
6652 send_interrupt_sequence ();
6655 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6656 the remote target. It is undefined which thread of which process
6657 reports the interrupt. Throws an error if the packet is not
6658 supported by the server. */
6661 remote_target::remote_interrupt_ns ()
6663 struct remote_state
*rs
= get_remote_state ();
6664 char *p
= rs
->buf
.data ();
6665 char *endp
= p
+ get_remote_packet_size ();
6667 xsnprintf (p
, endp
- p
, "vCtrlC");
6669 /* In non-stop, we get an immediate OK reply. The stop reply will
6670 come in asynchronously by notification. */
6672 getpkt (&rs
->buf
, 0);
6674 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6678 case PACKET_UNKNOWN
:
6679 error (_("No support for interrupting the remote target."));
6681 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
6685 /* Implement the to_stop function for the remote targets. */
6688 remote_target::stop (ptid_t ptid
)
6691 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6693 if (target_is_non_stop_p ())
6694 remote_stop_ns (ptid
);
6697 /* We don't currently have a way to transparently pause the
6698 remote target in all-stop mode. Interrupt it instead. */
6699 remote_interrupt_as ();
6703 /* Implement the to_interrupt function for the remote targets. */
6706 remote_target::interrupt ()
6709 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6711 if (target_is_non_stop_p ())
6712 remote_interrupt_ns ();
6714 remote_interrupt_as ();
6717 /* Implement the to_pass_ctrlc function for the remote targets. */
6720 remote_target::pass_ctrlc ()
6722 struct remote_state
*rs
= get_remote_state ();
6725 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6727 /* If we're starting up, we're not fully synced yet. Quit
6729 if (rs
->starting_up
)
6731 /* If ^C has already been sent once, offer to disconnect. */
6732 else if (rs
->ctrlc_pending_p
)
6735 target_interrupt ();
6738 /* Ask the user what to do when an interrupt is received. */
6741 remote_target::interrupt_query ()
6743 struct remote_state
*rs
= get_remote_state ();
6745 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6747 if (query (_("The target is not responding to interrupt requests.\n"
6748 "Stop debugging it? ")))
6750 remote_unpush_target ();
6751 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6756 if (query (_("Interrupted while waiting for the program.\n"
6757 "Give up waiting? ")))
6762 /* Enable/disable target terminal ownership. Most targets can use
6763 terminal groups to control terminal ownership. Remote targets are
6764 different in that explicit transfer of ownership to/from GDB/target
6768 remote_target::terminal_inferior ()
6770 /* NOTE: At this point we could also register our selves as the
6771 recipient of all input. Any characters typed could then be
6772 passed on down to the target. */
6776 remote_target::terminal_ours ()
6781 remote_console_output (const char *msg
)
6785 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6788 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6792 fputs_unfiltered (tb
, gdb_stdtarg
);
6794 gdb_flush (gdb_stdtarg
);
6797 struct stop_reply
: public notif_event
6801 /* The identifier of the thread about this event */
6804 /* The remote state this event is associated with. When the remote
6805 connection, represented by a remote_state object, is closed,
6806 all the associated stop_reply events should be released. */
6807 struct remote_state
*rs
;
6809 struct target_waitstatus ws
;
6811 /* The architecture associated with the expedited registers. */
6814 /* Expedited registers. This makes remote debugging a bit more
6815 efficient for those targets that provide critical registers as
6816 part of their normal status mechanism (as another roundtrip to
6817 fetch them is avoided). */
6818 std::vector
<cached_reg_t
> regcache
;
6820 enum target_stop_reason stop_reason
;
6822 CORE_ADDR watch_data_address
;
6827 /* Return the length of the stop reply queue. */
6830 remote_target::stop_reply_queue_length ()
6832 remote_state
*rs
= get_remote_state ();
6833 return rs
->stop_reply_queue
.size ();
6837 remote_notif_stop_parse (remote_target
*remote
,
6838 struct notif_client
*self
, const char *buf
,
6839 struct notif_event
*event
)
6841 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6845 remote_notif_stop_ack (remote_target
*remote
,
6846 struct notif_client
*self
, const char *buf
,
6847 struct notif_event
*event
)
6849 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6852 putpkt (remote
, self
->ack_command
);
6854 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6856 /* We got an unknown stop reply. */
6857 error (_("Unknown stop reply"));
6860 remote
->push_stop_reply (stop_reply
);
6864 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
6865 struct notif_client
*self
)
6867 /* We can't get pending events in remote_notif_process for
6868 notification stop, and we have to do this in remote_wait_ns
6869 instead. If we fetch all queued events from stub, remote stub
6870 may exit and we have no chance to process them back in
6872 remote_state
*rs
= remote
->get_remote_state ();
6873 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
6877 stop_reply::~stop_reply ()
6879 for (cached_reg_t
®
: regcache
)
6883 static notif_event_up
6884 remote_notif_stop_alloc_reply ()
6886 return notif_event_up (new struct stop_reply ());
6889 /* A client of notification Stop. */
6891 struct notif_client notif_client_stop
=
6895 remote_notif_stop_parse
,
6896 remote_notif_stop_ack
,
6897 remote_notif_stop_can_get_pending_events
,
6898 remote_notif_stop_alloc_reply
,
6902 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6903 the pid of the process that owns the threads we want to check, or
6904 -1 if we want to check all threads. */
6907 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6910 if (ws
->kind
== TARGET_WAITKIND_FORKED
6911 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6913 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
6920 /* Return the thread's pending status used to determine whether the
6921 thread is a fork parent stopped at a fork event. */
6923 static struct target_waitstatus
*
6924 thread_pending_fork_status (struct thread_info
*thread
)
6926 if (thread
->suspend
.waitstatus_pending_p
)
6927 return &thread
->suspend
.waitstatus
;
6929 return &thread
->pending_follow
;
6932 /* Determine if THREAD is a pending fork parent thread. */
6935 is_pending_fork_parent_thread (struct thread_info
*thread
)
6937 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6940 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6943 /* If CONTEXT contains any fork child threads that have not been
6944 reported yet, remove them from the CONTEXT list. If such a
6945 thread exists it is because we are stopped at a fork catchpoint
6946 and have not yet called follow_fork, which will set up the
6947 host-side data structures for the new process. */
6950 remote_target::remove_new_fork_children (threads_listing_context
*context
)
6953 struct notif_client
*notif
= ¬if_client_stop
;
6955 /* For any threads stopped at a fork event, remove the corresponding
6956 fork child threads from the CONTEXT list. */
6957 for (thread_info
*thread
: all_non_exited_threads ())
6959 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6961 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6962 context
->remove_thread (ws
->value
.related_pid
);
6965 /* Check for any pending fork events (not reported or processed yet)
6966 in process PID and remove those fork child threads from the
6967 CONTEXT list as well. */
6968 remote_notif_get_pending_events (notif
);
6969 for (auto &event
: get_remote_state ()->stop_reply_queue
)
6970 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6971 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6972 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6973 context
->remove_thread (event
->ws
.value
.related_pid
);
6976 /* Check whether any event pending in the vStopped queue would prevent
6977 a global or process wildcard vCont action. Clear
6978 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6979 and clear the event inferior's may_wildcard_vcont flag if we can't
6980 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6983 remote_target::check_pending_events_prevent_wildcard_vcont
6984 (int *may_global_wildcard
)
6986 struct notif_client
*notif
= ¬if_client_stop
;
6988 remote_notif_get_pending_events (notif
);
6989 for (auto &event
: get_remote_state ()->stop_reply_queue
)
6991 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6992 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6995 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6996 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6997 *may_global_wildcard
= 0;
6999 struct inferior
*inf
= find_inferior_ptid (event
->ptid
);
7001 /* This may be the first time we heard about this process.
7002 Regardless, we must not do a global wildcard resume, otherwise
7003 we'd resume this process too. */
7004 *may_global_wildcard
= 0;
7006 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7010 /* Discard all pending stop replies of inferior INF. */
7013 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7015 struct stop_reply
*reply
;
7016 struct remote_state
*rs
= get_remote_state ();
7017 struct remote_notif_state
*rns
= rs
->notif_state
;
7019 /* This function can be notified when an inferior exists. When the
7020 target is not remote, the notification state is NULL. */
7021 if (rs
->remote_desc
== NULL
)
7024 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7026 /* Discard the in-flight notification. */
7027 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7030 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
7033 /* Discard the stop replies we have already pulled with
7035 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7036 rs
->stop_reply_queue
.end (),
7037 [=] (const stop_reply_up
&event
)
7039 return event
->ptid
.pid () == inf
->pid
;
7041 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7044 /* Discard the stop replies for RS in stop_reply_queue. */
7047 remote_target::discard_pending_stop_replies_in_queue ()
7049 remote_state
*rs
= get_remote_state ();
7051 /* Discard the stop replies we have already pulled with
7053 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7054 rs
->stop_reply_queue
.end (),
7055 [=] (const stop_reply_up
&event
)
7057 return event
->rs
== rs
;
7059 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7062 /* Remove the first reply in 'stop_reply_queue' which matches
7066 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7068 remote_state
*rs
= get_remote_state ();
7070 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7071 rs
->stop_reply_queue
.end (),
7072 [=] (const stop_reply_up
&event
)
7074 return event
->ptid
.matches (ptid
);
7076 struct stop_reply
*result
;
7077 if (iter
== rs
->stop_reply_queue
.end ())
7081 result
= iter
->release ();
7082 rs
->stop_reply_queue
.erase (iter
);
7086 fprintf_unfiltered (gdb_stdlog
,
7087 "notif: discard queued event: 'Stop' in %s\n",
7088 target_pid_to_str (ptid
).c_str ());
7093 /* Look for a queued stop reply belonging to PTID. If one is found,
7094 remove it from the queue, and return it. Returns NULL if none is
7095 found. If there are still queued events left to process, tell the
7096 event loop to get back to target_wait soon. */
7099 remote_target::queued_stop_reply (ptid_t ptid
)
7101 remote_state
*rs
= get_remote_state ();
7102 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7104 if (!rs
->stop_reply_queue
.empty ())
7106 /* There's still at least an event left. */
7107 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7113 /* Push a fully parsed stop reply in the stop reply queue. Since we
7114 know that we now have at least one queued event left to pass to the
7115 core side, tell the event loop to get back to target_wait soon. */
7118 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7120 remote_state
*rs
= get_remote_state ();
7121 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7124 fprintf_unfiltered (gdb_stdlog
,
7125 "notif: push 'Stop' %s to queue %d\n",
7126 target_pid_to_str (new_event
->ptid
).c_str (),
7127 int (rs
->stop_reply_queue
.size ()));
7129 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7132 /* Returns true if we have a stop reply for PTID. */
7135 remote_target::peek_stop_reply (ptid_t ptid
)
7137 remote_state
*rs
= get_remote_state ();
7138 for (auto &event
: rs
->stop_reply_queue
)
7139 if (ptid
== event
->ptid
7140 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7145 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7146 starting with P and ending with PEND matches PREFIX. */
7149 strprefix (const char *p
, const char *pend
, const char *prefix
)
7151 for ( ; p
< pend
; p
++, prefix
++)
7154 return *prefix
== '\0';
7157 /* Parse the stop reply in BUF. Either the function succeeds, and the
7158 result is stored in EVENT, or throws an error. */
7161 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7163 remote_arch_state
*rsa
= NULL
;
7168 event
->ptid
= null_ptid
;
7169 event
->rs
= get_remote_state ();
7170 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7171 event
->ws
.value
.integer
= 0;
7172 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7173 event
->regcache
.clear ();
7178 case 'T': /* Status with PC, SP, FP, ... */
7179 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7180 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7182 n... = register number
7183 r... = register contents
7186 p
= &buf
[3]; /* after Txx */
7192 p1
= strchr (p
, ':');
7194 error (_("Malformed packet(a) (missing colon): %s\n\
7198 error (_("Malformed packet(a) (missing register number): %s\n\
7202 /* Some "registers" are actually extended stop information.
7203 Note if you're adding a new entry here: GDB 7.9 and
7204 earlier assume that all register "numbers" that start
7205 with an hex digit are real register numbers. Make sure
7206 the server only sends such a packet if it knows the
7207 client understands it. */
7209 if (strprefix (p
, p1
, "thread"))
7210 event
->ptid
= read_ptid (++p1
, &p
);
7211 else if (strprefix (p
, p1
, "syscall_entry"))
7215 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7216 p
= unpack_varlen_hex (++p1
, &sysno
);
7217 event
->ws
.value
.syscall_number
= (int) sysno
;
7219 else if (strprefix (p
, p1
, "syscall_return"))
7223 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7224 p
= unpack_varlen_hex (++p1
, &sysno
);
7225 event
->ws
.value
.syscall_number
= (int) sysno
;
7227 else if (strprefix (p
, p1
, "watch")
7228 || strprefix (p
, p1
, "rwatch")
7229 || strprefix (p
, p1
, "awatch"))
7231 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7232 p
= unpack_varlen_hex (++p1
, &addr
);
7233 event
->watch_data_address
= (CORE_ADDR
) addr
;
7235 else if (strprefix (p
, p1
, "swbreak"))
7237 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7239 /* Make sure the stub doesn't forget to indicate support
7241 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7242 error (_("Unexpected swbreak stop reason"));
7244 /* The value part is documented as "must be empty",
7245 though we ignore it, in case we ever decide to make
7246 use of it in a backward compatible way. */
7247 p
= strchrnul (p1
+ 1, ';');
7249 else if (strprefix (p
, p1
, "hwbreak"))
7251 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7253 /* Make sure the stub doesn't forget to indicate support
7255 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7256 error (_("Unexpected hwbreak stop reason"));
7259 p
= strchrnul (p1
+ 1, ';');
7261 else if (strprefix (p
, p1
, "library"))
7263 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7264 p
= strchrnul (p1
+ 1, ';');
7266 else if (strprefix (p
, p1
, "replaylog"))
7268 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7269 /* p1 will indicate "begin" or "end", but it makes
7270 no difference for now, so ignore it. */
7271 p
= strchrnul (p1
+ 1, ';');
7273 else if (strprefix (p
, p1
, "core"))
7277 p
= unpack_varlen_hex (++p1
, &c
);
7280 else if (strprefix (p
, p1
, "fork"))
7282 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7283 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7285 else if (strprefix (p
, p1
, "vfork"))
7287 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7288 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7290 else if (strprefix (p
, p1
, "vforkdone"))
7292 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7293 p
= strchrnul (p1
+ 1, ';');
7295 else if (strprefix (p
, p1
, "exec"))
7300 /* Determine the length of the execd pathname. */
7301 p
= unpack_varlen_hex (++p1
, &ignored
);
7302 pathlen
= (p
- p1
) / 2;
7304 /* Save the pathname for event reporting and for
7305 the next run command. */
7306 gdb::unique_xmalloc_ptr
<char[]> pathname
7307 ((char *) xmalloc (pathlen
+ 1));
7308 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7309 pathname
[pathlen
] = '\0';
7311 /* This is freed during event handling. */
7312 event
->ws
.value
.execd_pathname
= pathname
.release ();
7313 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7315 /* Skip the registers included in this packet, since
7316 they may be for an architecture different from the
7317 one used by the original program. */
7320 else if (strprefix (p
, p1
, "create"))
7322 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7323 p
= strchrnul (p1
+ 1, ';');
7332 p
= strchrnul (p1
+ 1, ';');
7337 /* Maybe a real ``P'' register number. */
7338 p_temp
= unpack_varlen_hex (p
, &pnum
);
7339 /* If the first invalid character is the colon, we got a
7340 register number. Otherwise, it's an unknown stop
7344 /* If we haven't parsed the event's thread yet, find
7345 it now, in order to find the architecture of the
7346 reported expedited registers. */
7347 if (event
->ptid
== null_ptid
)
7349 const char *thr
= strstr (p1
+ 1, ";thread:");
7351 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7355 /* Either the current thread hasn't changed,
7356 or the inferior is not multi-threaded.
7357 The event must be for the thread we last
7358 set as (or learned as being) current. */
7359 event
->ptid
= event
->rs
->general_thread
;
7365 inferior
*inf
= (event
->ptid
== null_ptid
7367 : find_inferior_ptid (event
->ptid
));
7368 /* If this is the first time we learn anything
7369 about this process, skip the registers
7370 included in this packet, since we don't yet
7371 know which architecture to use to parse them.
7372 We'll determine the architecture later when
7373 we process the stop reply and retrieve the
7374 target description, via
7375 remote_notice_new_inferior ->
7376 post_create_inferior. */
7379 p
= strchrnul (p1
+ 1, ';');
7384 event
->arch
= inf
->gdbarch
;
7385 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7389 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7390 cached_reg_t cached_reg
;
7393 error (_("Remote sent bad register number %s: %s\n\
7395 hex_string (pnum
), p
, buf
);
7397 cached_reg
.num
= reg
->regnum
;
7398 cached_reg
.data
= (gdb_byte
*)
7399 xmalloc (register_size (event
->arch
, reg
->regnum
));
7402 fieldsize
= hex2bin (p
, cached_reg
.data
,
7403 register_size (event
->arch
, reg
->regnum
));
7405 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7406 warning (_("Remote reply is too short: %s"), buf
);
7408 event
->regcache
.push_back (cached_reg
);
7412 /* Not a number. Silently skip unknown optional
7414 p
= strchrnul (p1
+ 1, ';');
7419 error (_("Remote register badly formatted: %s\nhere: %s"),
7424 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7428 case 'S': /* Old style status, just signal only. */
7432 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7433 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7434 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7435 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7437 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7440 case 'w': /* Thread exited. */
7444 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7445 p
= unpack_varlen_hex (&buf
[1], &value
);
7446 event
->ws
.value
.integer
= value
;
7448 error (_("stop reply packet badly formatted: %s"), buf
);
7449 event
->ptid
= read_ptid (++p
, NULL
);
7452 case 'W': /* Target exited. */
7458 /* GDB used to accept only 2 hex chars here. Stubs should
7459 only send more if they detect GDB supports multi-process
7461 p
= unpack_varlen_hex (&buf
[1], &value
);
7465 /* The remote process exited. */
7466 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7467 event
->ws
.value
.integer
= value
;
7471 /* The remote process exited with a signal. */
7472 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7473 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7474 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7476 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7479 /* If no process is specified, assume inferior_ptid. */
7480 pid
= inferior_ptid
.pid ();
7489 else if (startswith (p
, "process:"))
7493 p
+= sizeof ("process:") - 1;
7494 unpack_varlen_hex (p
, &upid
);
7498 error (_("unknown stop reply packet: %s"), buf
);
7501 error (_("unknown stop reply packet: %s"), buf
);
7502 event
->ptid
= ptid_t (pid
);
7506 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7507 event
->ptid
= minus_one_ptid
;
7511 if (target_is_non_stop_p () && event
->ptid
== null_ptid
)
7512 error (_("No process or thread specified in stop reply: %s"), buf
);
7515 /* When the stub wants to tell GDB about a new notification reply, it
7516 sends a notification (%Stop, for example). Those can come it at
7517 any time, hence, we have to make sure that any pending
7518 putpkt/getpkt sequence we're making is finished, before querying
7519 the stub for more events with the corresponding ack command
7520 (vStopped, for example). E.g., if we started a vStopped sequence
7521 immediately upon receiving the notification, something like this
7529 1.6) <-- (registers reply to step #1.3)
7531 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7534 To solve this, whenever we parse a %Stop notification successfully,
7535 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7536 doing whatever we were doing:
7542 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7543 2.5) <-- (registers reply to step #2.3)
7545 Eventualy after step #2.5, we return to the event loop, which
7546 notices there's an event on the
7547 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7548 associated callback --- the function below. At this point, we're
7549 always safe to start a vStopped sequence. :
7552 2.7) <-- T05 thread:2
7558 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7560 struct remote_state
*rs
= get_remote_state ();
7562 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7565 fprintf_unfiltered (gdb_stdlog
,
7566 "notif: process: '%s' ack pending event\n",
7570 nc
->ack (this, nc
, rs
->buf
.data (),
7571 rs
->notif_state
->pending_event
[nc
->id
]);
7572 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7576 getpkt (&rs
->buf
, 0);
7577 if (strcmp (rs
->buf
.data (), "OK") == 0)
7580 remote_notif_ack (this, nc
, rs
->buf
.data ());
7586 fprintf_unfiltered (gdb_stdlog
,
7587 "notif: process: '%s' no pending reply\n",
7592 /* Wrapper around remote_target::remote_notif_get_pending_events to
7593 avoid having to export the whole remote_target class. */
7596 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7598 remote
->remote_notif_get_pending_events (nc
);
7601 /* Called when it is decided that STOP_REPLY holds the info of the
7602 event that is to be returned to the core. This function always
7603 destroys STOP_REPLY. */
7606 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
7607 struct target_waitstatus
*status
)
7611 *status
= stop_reply
->ws
;
7612 ptid
= stop_reply
->ptid
;
7614 /* If no thread/process was reported by the stub, assume the current
7616 if (ptid
== null_ptid
)
7617 ptid
= inferior_ptid
;
7619 if (status
->kind
!= TARGET_WAITKIND_EXITED
7620 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7621 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7623 /* Expedited registers. */
7624 if (!stop_reply
->regcache
.empty ())
7626 struct regcache
*regcache
7627 = get_thread_arch_regcache (ptid
, stop_reply
->arch
);
7629 for (cached_reg_t
®
: stop_reply
->regcache
)
7631 regcache
->raw_supply (reg
.num
, reg
.data
);
7635 stop_reply
->regcache
.clear ();
7638 remote_notice_new_inferior (ptid
, 0);
7639 remote_thread_info
*remote_thr
= get_remote_thread_info (ptid
);
7640 remote_thr
->core
= stop_reply
->core
;
7641 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7642 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7643 remote_thr
->vcont_resumed
= 0;
7650 /* The non-stop mode version of target_wait. */
7653 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7655 struct remote_state
*rs
= get_remote_state ();
7656 struct stop_reply
*stop_reply
;
7660 /* If in non-stop mode, get out of getpkt even if a
7661 notification is received. */
7663 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
7666 if (ret
!= -1 && !is_notif
)
7669 case 'E': /* Error of some sort. */
7670 /* We're out of sync with the target now. Did it continue
7671 or not? We can't tell which thread it was in non-stop,
7672 so just ignore this. */
7673 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
7675 case 'O': /* Console output. */
7676 remote_console_output (&rs
->buf
[1]);
7679 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
7683 /* Acknowledge a pending stop reply that may have arrived in the
7685 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7686 remote_notif_get_pending_events (¬if_client_stop
);
7688 /* If indeed we noticed a stop reply, we're done. */
7689 stop_reply
= queued_stop_reply (ptid
);
7690 if (stop_reply
!= NULL
)
7691 return process_stop_reply (stop_reply
, status
);
7693 /* Still no event. If we're just polling for an event, then
7694 return to the event loop. */
7695 if (options
& TARGET_WNOHANG
)
7697 status
->kind
= TARGET_WAITKIND_IGNORE
;
7698 return minus_one_ptid
;
7701 /* Otherwise do a blocking wait. */
7702 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
7706 /* Wait until the remote machine stops, then return, storing status in
7707 STATUS just as `wait' would. */
7710 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
, int options
)
7712 struct remote_state
*rs
= get_remote_state ();
7713 ptid_t event_ptid
= null_ptid
;
7715 struct stop_reply
*stop_reply
;
7719 status
->kind
= TARGET_WAITKIND_IGNORE
;
7720 status
->value
.integer
= 0;
7722 stop_reply
= queued_stop_reply (ptid
);
7723 if (stop_reply
!= NULL
)
7724 return process_stop_reply (stop_reply
, status
);
7726 if (rs
->cached_wait_status
)
7727 /* Use the cached wait status, but only once. */
7728 rs
->cached_wait_status
= 0;
7733 int forever
= ((options
& TARGET_WNOHANG
) == 0
7734 && rs
->wait_forever_enabled_p
);
7736 if (!rs
->waiting_for_stop_reply
)
7738 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7739 return minus_one_ptid
;
7742 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7743 _never_ wait for ever -> test on target_is_async_p().
7744 However, before we do that we need to ensure that the caller
7745 knows how to take the target into/out of async mode. */
7746 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
7748 /* GDB gets a notification. Return to core as this event is
7750 if (ret
!= -1 && is_notif
)
7751 return minus_one_ptid
;
7753 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7754 return minus_one_ptid
;
7757 buf
= rs
->buf
.data ();
7759 /* Assume that the target has acknowledged Ctrl-C unless we receive
7760 an 'F' or 'O' packet. */
7761 if (buf
[0] != 'F' && buf
[0] != 'O')
7762 rs
->ctrlc_pending_p
= 0;
7766 case 'E': /* Error of some sort. */
7767 /* We're out of sync with the target now. Did it continue or
7768 not? Not is more likely, so report a stop. */
7769 rs
->waiting_for_stop_reply
= 0;
7771 warning (_("Remote failure reply: %s"), buf
);
7772 status
->kind
= TARGET_WAITKIND_STOPPED
;
7773 status
->value
.sig
= GDB_SIGNAL_0
;
7775 case 'F': /* File-I/O request. */
7776 /* GDB may access the inferior memory while handling the File-I/O
7777 request, but we don't want GDB accessing memory while waiting
7778 for a stop reply. See the comments in putpkt_binary. Set
7779 waiting_for_stop_reply to 0 temporarily. */
7780 rs
->waiting_for_stop_reply
= 0;
7781 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
7782 rs
->ctrlc_pending_p
= 0;
7783 /* GDB handled the File-I/O request, and the target is running
7784 again. Keep waiting for events. */
7785 rs
->waiting_for_stop_reply
= 1;
7787 case 'N': case 'T': case 'S': case 'X': case 'W':
7789 /* There is a stop reply to handle. */
7790 rs
->waiting_for_stop_reply
= 0;
7793 = (struct stop_reply
*) remote_notif_parse (this,
7797 event_ptid
= process_stop_reply (stop_reply
, status
);
7800 case 'O': /* Console output. */
7801 remote_console_output (buf
+ 1);
7804 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7806 /* Zero length reply means that we tried 'S' or 'C' and the
7807 remote system doesn't support it. */
7808 target_terminal::ours_for_output ();
7810 ("Can't send signals to this remote system. %s not sent.\n",
7811 gdb_signal_to_name (rs
->last_sent_signal
));
7812 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7813 target_terminal::inferior ();
7815 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7821 warning (_("Invalid remote reply: %s"), buf
);
7825 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7826 return minus_one_ptid
;
7827 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7829 /* Nothing interesting happened. If we're doing a non-blocking
7830 poll, we're done. Otherwise, go back to waiting. */
7831 if (options
& TARGET_WNOHANG
)
7832 return minus_one_ptid
;
7836 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7837 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7839 if (event_ptid
!= null_ptid
)
7840 record_currthread (rs
, event_ptid
);
7842 event_ptid
= inferior_ptid
;
7845 /* A process exit. Invalidate our notion of current thread. */
7846 record_currthread (rs
, minus_one_ptid
);
7851 /* Wait until the remote machine stops, then return, storing status in
7852 STATUS just as `wait' would. */
7855 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7859 if (target_is_non_stop_p ())
7860 event_ptid
= wait_ns (ptid
, status
, options
);
7862 event_ptid
= wait_as (ptid
, status
, options
);
7864 if (target_is_async_p ())
7866 remote_state
*rs
= get_remote_state ();
7868 /* If there are are events left in the queue tell the event loop
7870 if (!rs
->stop_reply_queue
.empty ())
7871 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7877 /* Fetch a single register using a 'p' packet. */
7880 remote_target::fetch_register_using_p (struct regcache
*regcache
,
7883 struct gdbarch
*gdbarch
= regcache
->arch ();
7884 struct remote_state
*rs
= get_remote_state ();
7886 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7889 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7892 if (reg
->pnum
== -1)
7895 p
= rs
->buf
.data ();
7897 p
+= hexnumstr (p
, reg
->pnum
);
7900 getpkt (&rs
->buf
, 0);
7902 buf
= rs
->buf
.data ();
7904 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
7908 case PACKET_UNKNOWN
:
7911 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7912 gdbarch_register_name (regcache
->arch (),
7917 /* If this register is unfetchable, tell the regcache. */
7920 regcache
->raw_supply (reg
->regnum
, NULL
);
7924 /* Otherwise, parse and supply the value. */
7930 error (_("fetch_register_using_p: early buf termination"));
7932 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7935 regcache
->raw_supply (reg
->regnum
, regp
);
7939 /* Fetch the registers included in the target's 'g' packet. */
7942 remote_target::send_g_packet ()
7944 struct remote_state
*rs
= get_remote_state ();
7947 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
7949 getpkt (&rs
->buf
, 0);
7950 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7951 error (_("Could not read registers; remote failure reply '%s'"),
7954 /* We can get out of synch in various cases. If the first character
7955 in the buffer is not a hex character, assume that has happened
7956 and try to fetch another packet to read. */
7957 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7958 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7959 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7960 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7963 fprintf_unfiltered (gdb_stdlog
,
7964 "Bad register packet; fetching a new packet\n");
7965 getpkt (&rs
->buf
, 0);
7968 buf_len
= strlen (rs
->buf
.data ());
7970 /* Sanity check the received packet. */
7971 if (buf_len
% 2 != 0)
7972 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
7978 remote_target::process_g_packet (struct regcache
*regcache
)
7980 struct gdbarch
*gdbarch
= regcache
->arch ();
7981 struct remote_state
*rs
= get_remote_state ();
7982 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
7987 buf_len
= strlen (rs
->buf
.data ());
7989 /* Further sanity checks, with knowledge of the architecture. */
7990 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7991 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
7993 rsa
->sizeof_g_packet
, buf_len
/ 2,
7996 /* Save the size of the packet sent to us by the target. It is used
7997 as a heuristic when determining the max size of packets that the
7998 target can safely receive. */
7999 if (rsa
->actual_register_packet_size
== 0)
8000 rsa
->actual_register_packet_size
= buf_len
;
8002 /* If this is smaller than we guessed the 'g' packet would be,
8003 update our records. A 'g' reply that doesn't include a register's
8004 value implies either that the register is not available, or that
8005 the 'p' packet must be used. */
8006 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8008 long sizeof_g_packet
= buf_len
/ 2;
8010 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8012 long offset
= rsa
->regs
[i
].offset
;
8013 long reg_size
= register_size (gdbarch
, i
);
8015 if (rsa
->regs
[i
].pnum
== -1)
8018 if (offset
>= sizeof_g_packet
)
8019 rsa
->regs
[i
].in_g_packet
= 0;
8020 else if (offset
+ reg_size
> sizeof_g_packet
)
8021 error (_("Truncated register %d in remote 'g' packet"), i
);
8023 rsa
->regs
[i
].in_g_packet
= 1;
8026 /* Looks valid enough, we can assume this is the correct length
8027 for a 'g' packet. It's important not to adjust
8028 rsa->sizeof_g_packet if we have truncated registers otherwise
8029 this "if" won't be run the next time the method is called
8030 with a packet of the same size and one of the internal errors
8031 below will trigger instead. */
8032 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8035 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8037 /* Unimplemented registers read as all bits zero. */
8038 memset (regs
, 0, rsa
->sizeof_g_packet
);
8040 /* Reply describes registers byte by byte, each byte encoded as two
8041 hex characters. Suck them all up, then supply them to the
8042 register cacheing/storage mechanism. */
8044 p
= rs
->buf
.data ();
8045 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8047 if (p
[0] == 0 || p
[1] == 0)
8048 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8049 internal_error (__FILE__
, __LINE__
,
8050 _("unexpected end of 'g' packet reply"));
8052 if (p
[0] == 'x' && p
[1] == 'x')
8053 regs
[i
] = 0; /* 'x' */
8055 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8059 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8061 struct packet_reg
*r
= &rsa
->regs
[i
];
8062 long reg_size
= register_size (gdbarch
, i
);
8066 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8067 /* This shouldn't happen - we adjusted in_g_packet above. */
8068 internal_error (__FILE__
, __LINE__
,
8069 _("unexpected end of 'g' packet reply"));
8070 else if (rs
->buf
[r
->offset
* 2] == 'x')
8072 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8073 /* The register isn't available, mark it as such (at
8074 the same time setting the value to zero). */
8075 regcache
->raw_supply (r
->regnum
, NULL
);
8078 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8084 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8087 process_g_packet (regcache
);
8090 /* Make the remote selected traceframe match GDB's selected
8094 remote_target::set_remote_traceframe ()
8097 struct remote_state
*rs
= get_remote_state ();
8099 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8102 /* Avoid recursion, remote_trace_find calls us again. */
8103 rs
->remote_traceframe_number
= get_traceframe_number ();
8105 newnum
= target_trace_find (tfind_number
,
8106 get_traceframe_number (), 0, 0, NULL
);
8108 /* Should not happen. If it does, all bets are off. */
8109 if (newnum
!= get_traceframe_number ())
8110 warning (_("could not set remote traceframe"));
8114 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8116 struct gdbarch
*gdbarch
= regcache
->arch ();
8117 struct remote_state
*rs
= get_remote_state ();
8118 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8121 set_remote_traceframe ();
8122 set_general_thread (regcache
->ptid ());
8126 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8128 gdb_assert (reg
!= NULL
);
8130 /* If this register might be in the 'g' packet, try that first -
8131 we are likely to read more than one register. If this is the
8132 first 'g' packet, we might be overly optimistic about its
8133 contents, so fall back to 'p'. */
8134 if (reg
->in_g_packet
)
8136 fetch_registers_using_g (regcache
);
8137 if (reg
->in_g_packet
)
8141 if (fetch_register_using_p (regcache
, reg
))
8144 /* This register is not available. */
8145 regcache
->raw_supply (reg
->regnum
, NULL
);
8150 fetch_registers_using_g (regcache
);
8152 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8153 if (!rsa
->regs
[i
].in_g_packet
)
8154 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8156 /* This register is not available. */
8157 regcache
->raw_supply (i
, NULL
);
8161 /* Prepare to store registers. Since we may send them all (using a
8162 'G' request), we have to read out the ones we don't want to change
8166 remote_target::prepare_to_store (struct regcache
*regcache
)
8168 struct remote_state
*rs
= get_remote_state ();
8169 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8172 /* Make sure the entire registers array is valid. */
8173 switch (packet_support (PACKET_P
))
8175 case PACKET_DISABLE
:
8176 case PACKET_SUPPORT_UNKNOWN
:
8177 /* Make sure all the necessary registers are cached. */
8178 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8179 if (rsa
->regs
[i
].in_g_packet
)
8180 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8187 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8188 packet was not recognized. */
8191 remote_target::store_register_using_P (const struct regcache
*regcache
,
8194 struct gdbarch
*gdbarch
= regcache
->arch ();
8195 struct remote_state
*rs
= get_remote_state ();
8196 /* Try storing a single register. */
8197 char *buf
= rs
->buf
.data ();
8198 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8201 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8204 if (reg
->pnum
== -1)
8207 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8208 p
= buf
+ strlen (buf
);
8209 regcache
->raw_collect (reg
->regnum
, regp
);
8210 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8212 getpkt (&rs
->buf
, 0);
8214 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8219 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8220 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8221 case PACKET_UNKNOWN
:
8224 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8228 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8229 contents of the register cache buffer. FIXME: ignores errors. */
8232 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8234 struct remote_state
*rs
= get_remote_state ();
8235 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8239 /* Extract all the registers in the regcache copying them into a
8244 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8245 memset (regs
, 0, rsa
->sizeof_g_packet
);
8246 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8248 struct packet_reg
*r
= &rsa
->regs
[i
];
8251 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8255 /* Command describes registers byte by byte,
8256 each byte encoded as two hex characters. */
8257 p
= rs
->buf
.data ();
8259 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8261 getpkt (&rs
->buf
, 0);
8262 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8263 error (_("Could not write registers; remote failure reply '%s'"),
8267 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8268 of the register cache buffer. FIXME: ignores errors. */
8271 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8273 struct gdbarch
*gdbarch
= regcache
->arch ();
8274 struct remote_state
*rs
= get_remote_state ();
8275 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8278 set_remote_traceframe ();
8279 set_general_thread (regcache
->ptid ());
8283 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8285 gdb_assert (reg
!= NULL
);
8287 /* Always prefer to store registers using the 'P' packet if
8288 possible; we often change only a small number of registers.
8289 Sometimes we change a larger number; we'd need help from a
8290 higher layer to know to use 'G'. */
8291 if (store_register_using_P (regcache
, reg
))
8294 /* For now, don't complain if we have no way to write the
8295 register. GDB loses track of unavailable registers too
8296 easily. Some day, this may be an error. We don't have
8297 any way to read the register, either... */
8298 if (!reg
->in_g_packet
)
8301 store_registers_using_G (regcache
);
8305 store_registers_using_G (regcache
);
8307 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8308 if (!rsa
->regs
[i
].in_g_packet
)
8309 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8310 /* See above for why we do not issue an error here. */
8315 /* Return the number of hex digits in num. */
8318 hexnumlen (ULONGEST num
)
8322 for (i
= 0; num
!= 0; i
++)
8325 return std::max (i
, 1);
8328 /* Set BUF to the minimum number of hex digits representing NUM. */
8331 hexnumstr (char *buf
, ULONGEST num
)
8333 int len
= hexnumlen (num
);
8335 return hexnumnstr (buf
, num
, len
);
8339 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8342 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8348 for (i
= width
- 1; i
>= 0; i
--)
8350 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8357 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8360 remote_address_masked (CORE_ADDR addr
)
8362 unsigned int address_size
= remote_address_size
;
8364 /* If "remoteaddresssize" was not set, default to target address size. */
8366 address_size
= gdbarch_addr_bit (target_gdbarch ());
8368 if (address_size
> 0
8369 && address_size
< (sizeof (ULONGEST
) * 8))
8371 /* Only create a mask when that mask can safely be constructed
8372 in a ULONGEST variable. */
8375 mask
= (mask
<< address_size
) - 1;
8381 /* Determine whether the remote target supports binary downloading.
8382 This is accomplished by sending a no-op memory write of zero length
8383 to the target at the specified address. It does not suffice to send
8384 the whole packet, since many stubs strip the eighth bit and
8385 subsequently compute a wrong checksum, which causes real havoc with
8388 NOTE: This can still lose if the serial line is not eight-bit
8389 clean. In cases like this, the user should clear "remote
8393 remote_target::check_binary_download (CORE_ADDR addr
)
8395 struct remote_state
*rs
= get_remote_state ();
8397 switch (packet_support (PACKET_X
))
8399 case PACKET_DISABLE
:
8403 case PACKET_SUPPORT_UNKNOWN
:
8407 p
= rs
->buf
.data ();
8409 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8411 p
+= hexnumstr (p
, (ULONGEST
) 0);
8415 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8416 getpkt (&rs
->buf
, 0);
8418 if (rs
->buf
[0] == '\0')
8421 fprintf_unfiltered (gdb_stdlog
,
8422 "binary downloading NOT "
8423 "supported by target\n");
8424 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8429 fprintf_unfiltered (gdb_stdlog
,
8430 "binary downloading supported by target\n");
8431 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8438 /* Helper function to resize the payload in order to try to get a good
8439 alignment. We try to write an amount of data such that the next write will
8440 start on an address aligned on REMOTE_ALIGN_WRITES. */
8443 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8445 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8448 /* Write memory data directly to the remote machine.
8449 This does not inform the data cache; the data cache uses this.
8450 HEADER is the starting part of the packet.
8451 MEMADDR is the address in the remote memory space.
8452 MYADDR is the address of the buffer in our space.
8453 LEN_UNITS is the number of addressable units to write.
8454 UNIT_SIZE is the length in bytes of an addressable unit.
8455 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8456 should send data as binary ('X'), or hex-encoded ('M').
8458 The function creates packet of the form
8459 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8461 where encoding of <DATA> is terminated by PACKET_FORMAT.
8463 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8466 Return the transferred status, error or OK (an
8467 'enum target_xfer_status' value). Save the number of addressable units
8468 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8470 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8471 exchange between gdb and the stub could look like (?? in place of the
8477 -> $M1000,3:eeeeffffeeee#??
8481 <- eeeeffffeeeedddd */
8484 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8485 const gdb_byte
*myaddr
,
8488 ULONGEST
*xfered_len_units
,
8489 char packet_format
, int use_length
)
8491 struct remote_state
*rs
= get_remote_state ();
8497 int payload_capacity_bytes
;
8498 int payload_length_bytes
;
8500 if (packet_format
!= 'X' && packet_format
!= 'M')
8501 internal_error (__FILE__
, __LINE__
,
8502 _("remote_write_bytes_aux: bad packet format"));
8505 return TARGET_XFER_EOF
;
8507 payload_capacity_bytes
= get_memory_write_packet_size ();
8509 /* The packet buffer will be large enough for the payload;
8510 get_memory_packet_size ensures this. */
8513 /* Compute the size of the actual payload by subtracting out the
8514 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8516 payload_capacity_bytes
-= strlen ("$,:#NN");
8518 /* The comma won't be used. */
8519 payload_capacity_bytes
+= 1;
8520 payload_capacity_bytes
-= strlen (header
);
8521 payload_capacity_bytes
-= hexnumlen (memaddr
);
8523 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8525 strcat (rs
->buf
.data (), header
);
8526 p
= rs
->buf
.data () + strlen (header
);
8528 /* Compute a best guess of the number of bytes actually transfered. */
8529 if (packet_format
== 'X')
8531 /* Best guess at number of bytes that will fit. */
8532 todo_units
= std::min (len_units
,
8533 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8535 payload_capacity_bytes
-= hexnumlen (todo_units
);
8536 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8540 /* Number of bytes that will fit. */
8542 = std::min (len_units
,
8543 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8545 payload_capacity_bytes
-= hexnumlen (todo_units
);
8546 todo_units
= std::min (todo_units
,
8547 (payload_capacity_bytes
/ unit_size
) / 2);
8550 if (todo_units
<= 0)
8551 internal_error (__FILE__
, __LINE__
,
8552 _("minimum packet size too small to write data"));
8554 /* If we already need another packet, then try to align the end
8555 of this packet to a useful boundary. */
8556 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8557 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8559 /* Append "<memaddr>". */
8560 memaddr
= remote_address_masked (memaddr
);
8561 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8568 /* Append the length and retain its location and size. It may need to be
8569 adjusted once the packet body has been created. */
8571 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8579 /* Append the packet body. */
8580 if (packet_format
== 'X')
8582 /* Binary mode. Send target system values byte by byte, in
8583 increasing byte addresses. Only escape certain critical
8585 payload_length_bytes
=
8586 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8587 &units_written
, payload_capacity_bytes
);
8589 /* If not all TODO units fit, then we'll need another packet. Make
8590 a second try to keep the end of the packet aligned. Don't do
8591 this if the packet is tiny. */
8592 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8596 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8598 if (new_todo_units
!= units_written
)
8599 payload_length_bytes
=
8600 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8601 (gdb_byte
*) p
, &units_written
,
8602 payload_capacity_bytes
);
8605 p
+= payload_length_bytes
;
8606 if (use_length
&& units_written
< todo_units
)
8608 /* Escape chars have filled up the buffer prematurely,
8609 and we have actually sent fewer units than planned.
8610 Fix-up the length field of the packet. Use the same
8611 number of characters as before. */
8612 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8614 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8619 /* Normal mode: Send target system values byte by byte, in
8620 increasing byte addresses. Each byte is encoded as a two hex
8622 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8623 units_written
= todo_units
;
8626 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8627 getpkt (&rs
->buf
, 0);
8629 if (rs
->buf
[0] == 'E')
8630 return TARGET_XFER_E_IO
;
8632 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8633 send fewer units than we'd planned. */
8634 *xfered_len_units
= (ULONGEST
) units_written
;
8635 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8638 /* Write memory data directly to the remote machine.
8639 This does not inform the data cache; the data cache uses this.
8640 MEMADDR is the address in the remote memory space.
8641 MYADDR is the address of the buffer in our space.
8642 LEN is the number of bytes.
8644 Return the transferred status, error or OK (an
8645 'enum target_xfer_status' value). Save the number of bytes
8646 transferred in *XFERED_LEN. Only transfer a single packet. */
8649 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
8650 ULONGEST len
, int unit_size
,
8651 ULONGEST
*xfered_len
)
8653 const char *packet_format
= NULL
;
8655 /* Check whether the target supports binary download. */
8656 check_binary_download (memaddr
);
8658 switch (packet_support (PACKET_X
))
8661 packet_format
= "X";
8663 case PACKET_DISABLE
:
8664 packet_format
= "M";
8666 case PACKET_SUPPORT_UNKNOWN
:
8667 internal_error (__FILE__
, __LINE__
,
8668 _("remote_write_bytes: bad internal state"));
8670 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8673 return remote_write_bytes_aux (packet_format
,
8674 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8675 packet_format
[0], 1);
8678 /* Read memory data directly from the remote machine.
8679 This does not use the data cache; the data cache uses this.
8680 MEMADDR is the address in the remote memory space.
8681 MYADDR is the address of the buffer in our space.
8682 LEN_UNITS is the number of addressable memory units to read..
8683 UNIT_SIZE is the length in bytes of an addressable unit.
8685 Return the transferred status, error or OK (an
8686 'enum target_xfer_status' value). Save the number of bytes
8687 transferred in *XFERED_LEN_UNITS.
8689 See the comment of remote_write_bytes_aux for an example of
8690 memory read/write exchange between gdb and the stub. */
8693 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
8695 int unit_size
, ULONGEST
*xfered_len_units
)
8697 struct remote_state
*rs
= get_remote_state ();
8698 int buf_size_bytes
; /* Max size of packet output buffer. */
8703 buf_size_bytes
= get_memory_read_packet_size ();
8704 /* The packet buffer will be large enough for the payload;
8705 get_memory_packet_size ensures this. */
8707 /* Number of units that will fit. */
8708 todo_units
= std::min (len_units
,
8709 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8711 /* Construct "m"<memaddr>","<len>". */
8712 memaddr
= remote_address_masked (memaddr
);
8713 p
= rs
->buf
.data ();
8715 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8717 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8720 getpkt (&rs
->buf
, 0);
8721 if (rs
->buf
[0] == 'E'
8722 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8723 && rs
->buf
[3] == '\0')
8724 return TARGET_XFER_E_IO
;
8725 /* Reply describes memory byte by byte, each byte encoded as two hex
8727 p
= rs
->buf
.data ();
8728 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8729 /* Return what we have. Let higher layers handle partial reads. */
8730 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8731 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8734 /* Using the set of read-only target sections of remote, read live
8737 For interface/parameters/return description see target.h,
8741 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
8745 ULONGEST
*xfered_len
)
8747 struct target_section
*secp
;
8748 struct target_section_table
*table
;
8750 secp
= target_section_by_addr (this, memaddr
);
8752 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
8754 struct target_section
*p
;
8755 ULONGEST memend
= memaddr
+ len
;
8757 table
= target_get_section_table (this);
8759 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8761 if (memaddr
>= p
->addr
)
8763 if (memend
<= p
->endaddr
)
8765 /* Entire transfer is within this section. */
8766 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8769 else if (memaddr
>= p
->endaddr
)
8771 /* This section ends before the transfer starts. */
8776 /* This section overlaps the transfer. Just do half. */
8777 len
= p
->endaddr
- memaddr
;
8778 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8785 return TARGET_XFER_EOF
;
8788 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8789 first if the requested memory is unavailable in traceframe.
8790 Otherwise, fall back to remote_read_bytes_1. */
8793 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
8794 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8795 ULONGEST
*xfered_len
)
8798 return TARGET_XFER_EOF
;
8800 if (get_traceframe_number () != -1)
8802 std::vector
<mem_range
> available
;
8804 /* If we fail to get the set of available memory, then the
8805 target does not support querying traceframe info, and so we
8806 attempt reading from the traceframe anyway (assuming the
8807 target implements the old QTro packet then). */
8808 if (traceframe_available_memory (&available
, memaddr
, len
))
8810 if (available
.empty () || available
[0].start
!= memaddr
)
8812 enum target_xfer_status res
;
8814 /* Don't read into the traceframe's available
8816 if (!available
.empty ())
8818 LONGEST oldlen
= len
;
8820 len
= available
[0].start
- memaddr
;
8821 gdb_assert (len
<= oldlen
);
8824 /* This goes through the topmost target again. */
8825 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
8826 len
, unit_size
, xfered_len
);
8827 if (res
== TARGET_XFER_OK
)
8828 return TARGET_XFER_OK
;
8831 /* No use trying further, we know some memory starting
8832 at MEMADDR isn't available. */
8834 return (*xfered_len
!= 0) ?
8835 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8839 /* Don't try to read more than how much is available, in
8840 case the target implements the deprecated QTro packet to
8841 cater for older GDBs (the target's knowledge of read-only
8842 sections may be outdated by now). */
8843 len
= available
[0].length
;
8847 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8852 /* Sends a packet with content determined by the printf format string
8853 FORMAT and the remaining arguments, then gets the reply. Returns
8854 whether the packet was a success, a failure, or unknown. */
8857 remote_target::remote_send_printf (const char *format
, ...)
8859 struct remote_state
*rs
= get_remote_state ();
8860 int max_size
= get_remote_packet_size ();
8863 va_start (ap
, format
);
8866 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
8870 if (size
>= max_size
)
8871 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8873 if (putpkt (rs
->buf
) < 0)
8874 error (_("Communication problem with target."));
8877 getpkt (&rs
->buf
, 0);
8879 return packet_check_result (rs
->buf
);
8882 /* Flash writing can take quite some time. We'll set
8883 effectively infinite timeout for flash operations.
8884 In future, we'll need to decide on a better approach. */
8885 static const int remote_flash_timeout
= 1000;
8888 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
8890 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8891 enum packet_result ret
;
8892 scoped_restore restore_timeout
8893 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8895 ret
= remote_send_printf ("vFlashErase:%s,%s",
8896 phex (address
, addr_size
),
8900 case PACKET_UNKNOWN
:
8901 error (_("Remote target does not support flash erase"));
8903 error (_("Error erasing flash with vFlashErase packet"));
8910 remote_target::remote_flash_write (ULONGEST address
,
8911 ULONGEST length
, ULONGEST
*xfered_len
,
8912 const gdb_byte
*data
)
8914 scoped_restore restore_timeout
8915 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8916 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8921 remote_target::flash_done ()
8925 scoped_restore restore_timeout
8926 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8928 ret
= remote_send_printf ("vFlashDone");
8932 case PACKET_UNKNOWN
:
8933 error (_("Remote target does not support vFlashDone"));
8935 error (_("Error finishing flash operation"));
8942 remote_target::files_info ()
8944 puts_filtered ("Debugging a target over a serial line.\n");
8947 /* Stuff for dealing with the packets which are part of this protocol.
8948 See comment at top of file for details. */
8950 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8951 error to higher layers. Called when a serial error is detected.
8952 The exception message is STRING, followed by a colon and a blank,
8953 the system error message for errno at function entry and final dot
8954 for output compatibility with throw_perror_with_name. */
8957 unpush_and_perror (const char *string
)
8959 int saved_errno
= errno
;
8961 remote_unpush_target ();
8962 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8963 safe_strerror (saved_errno
));
8966 /* Read a single character from the remote end. The current quit
8967 handler is overridden to avoid quitting in the middle of packet
8968 sequence, as that would break communication with the remote server.
8969 See remote_serial_quit_handler for more detail. */
8972 remote_target::readchar (int timeout
)
8975 struct remote_state
*rs
= get_remote_state ();
8978 scoped_restore restore_quit_target
8979 = make_scoped_restore (&curr_quit_handler_target
, this);
8980 scoped_restore restore_quit
8981 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
8983 rs
->got_ctrlc_during_io
= 0;
8985 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8987 if (rs
->got_ctrlc_during_io
)
8994 switch ((enum serial_rc
) ch
)
8997 remote_unpush_target ();
8998 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9001 unpush_and_perror (_("Remote communication error. "
9002 "Target disconnected."));
9004 case SERIAL_TIMEOUT
:
9010 /* Wrapper for serial_write that closes the target and throws if
9011 writing fails. The current quit handler is overridden to avoid
9012 quitting in the middle of packet sequence, as that would break
9013 communication with the remote server. See
9014 remote_serial_quit_handler for more detail. */
9017 remote_target::remote_serial_write (const char *str
, int len
)
9019 struct remote_state
*rs
= get_remote_state ();
9021 scoped_restore restore_quit_target
9022 = make_scoped_restore (&curr_quit_handler_target
, this);
9023 scoped_restore restore_quit
9024 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9026 rs
->got_ctrlc_during_io
= 0;
9028 if (serial_write (rs
->remote_desc
, str
, len
))
9030 unpush_and_perror (_("Remote communication error. "
9031 "Target disconnected."));
9034 if (rs
->got_ctrlc_during_io
)
9038 /* Return a string representing an escaped version of BUF, of len N.
9039 E.g. \n is converted to \\n, \t to \\t, etc. */
9042 escape_buffer (const char *buf
, int n
)
9046 stb
.putstrn (buf
, n
, '\\');
9047 return std::move (stb
.string ());
9050 /* Display a null-terminated packet on stdout, for debugging, using C
9054 print_packet (const char *buf
)
9056 puts_filtered ("\"");
9057 fputstr_filtered (buf
, '"', gdb_stdout
);
9058 puts_filtered ("\"");
9062 remote_target::putpkt (const char *buf
)
9064 return putpkt_binary (buf
, strlen (buf
));
9067 /* Wrapper around remote_target::putpkt to avoid exporting
9071 putpkt (remote_target
*remote
, const char *buf
)
9073 return remote
->putpkt (buf
);
9076 /* Send a packet to the remote machine, with error checking. The data
9077 of the packet is in BUF. The string in BUF can be at most
9078 get_remote_packet_size () - 5 to account for the $, # and checksum,
9079 and for a possible /0 if we are debugging (remote_debug) and want
9080 to print the sent packet as a string. */
9083 remote_target::putpkt_binary (const char *buf
, int cnt
)
9085 struct remote_state
*rs
= get_remote_state ();
9087 unsigned char csum
= 0;
9088 gdb::def_vector
<char> data (cnt
+ 6);
9089 char *buf2
= data
.data ();
9095 /* Catch cases like trying to read memory or listing threads while
9096 we're waiting for a stop reply. The remote server wouldn't be
9097 ready to handle this request, so we'd hang and timeout. We don't
9098 have to worry about this in synchronous mode, because in that
9099 case it's not possible to issue a command while the target is
9100 running. This is not a problem in non-stop mode, because in that
9101 case, the stub is always ready to process serial input. */
9102 if (!target_is_non_stop_p ()
9103 && target_is_async_p ()
9104 && rs
->waiting_for_stop_reply
)
9106 error (_("Cannot execute this command while the target is running.\n"
9107 "Use the \"interrupt\" command to stop the target\n"
9108 "and then try again."));
9111 /* We're sending out a new packet. Make sure we don't look at a
9112 stale cached response. */
9113 rs
->cached_wait_status
= 0;
9115 /* Copy the packet into buffer BUF2, encapsulating it
9116 and giving it a checksum. */
9121 for (i
= 0; i
< cnt
; i
++)
9127 *p
++ = tohex ((csum
>> 4) & 0xf);
9128 *p
++ = tohex (csum
& 0xf);
9130 /* Send it over and over until we get a positive ack. */
9134 int started_error_output
= 0;
9140 int len
= (int) (p
- buf2
);
9143 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
9145 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
9147 if (len
> REMOTE_DEBUG_MAX_CHAR
)
9148 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9149 len
- REMOTE_DEBUG_MAX_CHAR
);
9151 fprintf_unfiltered (gdb_stdlog
, "...");
9153 gdb_flush (gdb_stdlog
);
9155 remote_serial_write (buf2
, p
- buf2
);
9157 /* If this is a no acks version of the remote protocol, send the
9158 packet and move on. */
9162 /* Read until either a timeout occurs (-2) or '+' is read.
9163 Handle any notification that arrives in the mean time. */
9166 ch
= readchar (remote_timeout
);
9174 case SERIAL_TIMEOUT
:
9177 if (started_error_output
)
9179 putchar_unfiltered ('\n');
9180 started_error_output
= 0;
9189 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
9193 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
9195 case SERIAL_TIMEOUT
:
9199 break; /* Retransmit buffer. */
9203 fprintf_unfiltered (gdb_stdlog
,
9204 "Packet instead of Ack, ignoring it\n");
9205 /* It's probably an old response sent because an ACK
9206 was lost. Gobble up the packet and ack it so it
9207 doesn't get retransmitted when we resend this
9210 remote_serial_write ("+", 1);
9211 continue; /* Now, go look for +. */
9218 /* If we got a notification, handle it, and go back to looking
9220 /* We've found the start of a notification. Now
9221 collect the data. */
9222 val
= read_frame (&rs
->buf
);
9227 std::string str
= escape_buffer (rs
->buf
.data (), val
);
9229 fprintf_unfiltered (gdb_stdlog
,
9230 " Notification received: %s\n",
9233 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9234 /* We're in sync now, rewait for the ack. */
9241 if (!started_error_output
)
9243 started_error_output
= 1;
9244 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9246 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9247 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
.data ());
9256 if (!started_error_output
)
9258 started_error_output
= 1;
9259 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9261 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9265 break; /* Here to retransmit. */
9269 /* This is wrong. If doing a long backtrace, the user should be
9270 able to get out next time we call QUIT, without anything as
9271 violent as interrupt_query. If we want to provide a way out of
9272 here without getting to the next QUIT, it should be based on
9273 hitting ^C twice as in remote_wait. */
9285 /* Come here after finding the start of a frame when we expected an
9286 ack. Do our best to discard the rest of this packet. */
9289 remote_target::skip_frame ()
9295 c
= readchar (remote_timeout
);
9298 case SERIAL_TIMEOUT
:
9299 /* Nothing we can do. */
9302 /* Discard the two bytes of checksum and stop. */
9303 c
= readchar (remote_timeout
);
9305 c
= readchar (remote_timeout
);
9308 case '*': /* Run length encoding. */
9309 /* Discard the repeat count. */
9310 c
= readchar (remote_timeout
);
9315 /* A regular character. */
9321 /* Come here after finding the start of the frame. Collect the rest
9322 into *BUF, verifying the checksum, length, and handling run-length
9323 compression. NUL terminate the buffer. If there is not enough room,
9326 Returns -1 on error, number of characters in buffer (ignoring the
9327 trailing NULL) on success. (could be extended to return one of the
9328 SERIAL status indications). */
9331 remote_target::read_frame (gdb::char_vector
*buf_p
)
9336 char *buf
= buf_p
->data ();
9337 struct remote_state
*rs
= get_remote_state ();
9344 c
= readchar (remote_timeout
);
9347 case SERIAL_TIMEOUT
:
9349 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
9353 fputs_filtered ("Saw new packet start in middle of old one\n",
9355 return -1; /* Start a new packet, count retries. */
9358 unsigned char pktcsum
;
9364 check_0
= readchar (remote_timeout
);
9366 check_1
= readchar (remote_timeout
);
9368 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9371 fputs_filtered ("Timeout in checksum, retrying\n",
9375 else if (check_0
< 0 || check_1
< 0)
9378 fputs_filtered ("Communication error in checksum\n",
9383 /* Don't recompute the checksum; with no ack packets we
9384 don't have any way to indicate a packet retransmission
9389 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9390 if (csum
== pktcsum
)
9395 std::string str
= escape_buffer (buf
, bc
);
9397 fprintf_unfiltered (gdb_stdlog
,
9398 "Bad checksum, sentsum=0x%x, "
9399 "csum=0x%x, buf=%s\n",
9400 pktcsum
, csum
, str
.c_str ());
9402 /* Number of characters in buffer ignoring trailing
9406 case '*': /* Run length encoding. */
9411 c
= readchar (remote_timeout
);
9413 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9415 /* The character before ``*'' is repeated. */
9417 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9419 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9421 /* Make some more room in the buffer. */
9422 buf_p
->resize (buf_p
->size () + repeat
);
9423 buf
= buf_p
->data ();
9426 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9432 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9436 if (bc
>= buf_p
->size () - 1)
9438 /* Make some more room in the buffer. */
9439 buf_p
->resize (buf_p
->size () * 2);
9440 buf
= buf_p
->data ();
9450 /* Set this to the maximum number of seconds to wait instead of waiting forever
9451 in target_wait(). If this timer times out, then it generates an error and
9452 the command is aborted. This replaces most of the need for timeouts in the
9453 GDB test suite, and makes it possible to distinguish between a hung target
9454 and one with slow communications. */
9456 static int watchdog
= 0;
9458 show_watchdog (struct ui_file
*file
, int from_tty
,
9459 struct cmd_list_element
*c
, const char *value
)
9461 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
9464 /* Read a packet from the remote machine, with error checking, and
9465 store it in *BUF. Resize *BUF if necessary to hold the result. If
9466 FOREVER, wait forever rather than timing out; this is used (in
9467 synchronous mode) to wait for a target that is is executing user
9469 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9470 don't have to change all the calls to getpkt to deal with the
9471 return value, because at the moment I don't know what the right
9472 thing to do it for those. */
9475 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9477 getpkt_sane (buf
, forever
);
9481 /* Read a packet from the remote machine, with error checking, and
9482 store it in *BUF. Resize *BUF if necessary to hold the result. If
9483 FOREVER, wait forever rather than timing out; this is used (in
9484 synchronous mode) to wait for a target that is is executing user
9485 code to stop. If FOREVER == 0, this function is allowed to time
9486 out gracefully and return an indication of this to the caller.
9487 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9488 consider receiving a notification enough reason to return to the
9489 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9490 holds a notification or not (a regular packet). */
9493 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9494 int forever
, int expecting_notif
,
9497 struct remote_state
*rs
= get_remote_state ();
9503 /* We're reading a new response. Make sure we don't look at a
9504 previously cached response. */
9505 rs
->cached_wait_status
= 0;
9507 strcpy (buf
->data (), "timeout");
9510 timeout
= watchdog
> 0 ? watchdog
: -1;
9511 else if (expecting_notif
)
9512 timeout
= 0; /* There should already be a char in the buffer. If
9515 timeout
= remote_timeout
;
9519 /* Process any number of notifications, and then return when
9523 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9525 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9527 /* This can loop forever if the remote side sends us
9528 characters continuously, but if it pauses, we'll get
9529 SERIAL_TIMEOUT from readchar because of timeout. Then
9530 we'll count that as a retry.
9532 Note that even when forever is set, we will only wait
9533 forever prior to the start of a packet. After that, we
9534 expect characters to arrive at a brisk pace. They should
9535 show up within remote_timeout intervals. */
9537 c
= readchar (timeout
);
9538 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9540 if (c
== SERIAL_TIMEOUT
)
9542 if (expecting_notif
)
9543 return -1; /* Don't complain, it's normal to not get
9544 anything in this case. */
9546 if (forever
) /* Watchdog went off? Kill the target. */
9548 remote_unpush_target ();
9549 throw_error (TARGET_CLOSE_ERROR
,
9550 _("Watchdog timeout has expired. "
9551 "Target detached."));
9554 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9558 /* We've found the start of a packet or notification.
9559 Now collect the data. */
9560 val
= read_frame (buf
);
9565 remote_serial_write ("-", 1);
9568 if (tries
> MAX_TRIES
)
9570 /* We have tried hard enough, and just can't receive the
9571 packet/notification. Give up. */
9572 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9574 /* Skip the ack char if we're in no-ack mode. */
9575 if (!rs
->noack_mode
)
9576 remote_serial_write ("+", 1);
9580 /* If we got an ordinary packet, return that to our caller. */
9586 = escape_buffer (buf
->data (),
9587 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9589 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9592 if (val
> REMOTE_DEBUG_MAX_CHAR
)
9593 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9594 val
- REMOTE_DEBUG_MAX_CHAR
);
9596 fprintf_unfiltered (gdb_stdlog
, "\n");
9599 /* Skip the ack char if we're in no-ack mode. */
9600 if (!rs
->noack_mode
)
9601 remote_serial_write ("+", 1);
9602 if (is_notif
!= NULL
)
9607 /* If we got a notification, handle it, and go back to looking
9611 gdb_assert (c
== '%');
9615 std::string str
= escape_buffer (buf
->data (), val
);
9617 fprintf_unfiltered (gdb_stdlog
,
9618 " Notification received: %s\n",
9621 if (is_notif
!= NULL
)
9624 handle_notification (rs
->notif_state
, buf
->data ());
9626 /* Notifications require no acknowledgement. */
9628 if (expecting_notif
)
9635 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
9637 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
9641 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
9644 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
9647 /* Kill any new fork children of process PID that haven't been
9648 processed by follow_fork. */
9651 remote_target::kill_new_fork_children (int pid
)
9653 remote_state
*rs
= get_remote_state ();
9654 struct notif_client
*notif
= ¬if_client_stop
;
9656 /* Kill the fork child threads of any threads in process PID
9657 that are stopped at a fork event. */
9658 for (thread_info
*thread
: all_non_exited_threads ())
9660 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9662 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9664 int child_pid
= ws
->value
.related_pid
.pid ();
9667 res
= remote_vkill (child_pid
);
9669 error (_("Can't kill fork child process %d"), child_pid
);
9673 /* Check for any pending fork events (not reported or processed yet)
9674 in process PID and kill those fork child threads as well. */
9675 remote_notif_get_pending_events (notif
);
9676 for (auto &event
: rs
->stop_reply_queue
)
9677 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
9679 int child_pid
= event
->ws
.value
.related_pid
.pid ();
9682 res
= remote_vkill (child_pid
);
9684 error (_("Can't kill fork child process %d"), child_pid
);
9689 /* Target hook to kill the current inferior. */
9692 remote_target::kill ()
9695 int pid
= inferior_ptid
.pid ();
9696 struct remote_state
*rs
= get_remote_state ();
9698 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9700 /* If we're stopped while forking and we haven't followed yet,
9701 kill the child task. We need to do this before killing the
9702 parent task because if this is a vfork then the parent will
9704 kill_new_fork_children (pid
);
9706 res
= remote_vkill (pid
);
9709 target_mourn_inferior (inferior_ptid
);
9714 /* If we are in 'target remote' mode and we are killing the only
9715 inferior, then we will tell gdbserver to exit and unpush the
9717 if (res
== -1 && !remote_multi_process_p (rs
)
9718 && number_of_live_inferiors () == 1)
9722 /* We've killed the remote end, we get to mourn it. If we are
9723 not in extended mode, mourning the inferior also unpushes
9724 remote_ops from the target stack, which closes the remote
9726 target_mourn_inferior (inferior_ptid
);
9731 error (_("Can't kill process"));
9734 /* Send a kill request to the target using the 'vKill' packet. */
9737 remote_target::remote_vkill (int pid
)
9739 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9742 remote_state
*rs
= get_remote_state ();
9744 /* Tell the remote target to detach. */
9745 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
9747 getpkt (&rs
->buf
, 0);
9749 switch (packet_ok (rs
->buf
,
9750 &remote_protocol_packets
[PACKET_vKill
]))
9756 case PACKET_UNKNOWN
:
9759 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9763 /* Send a kill request to the target using the 'k' packet. */
9766 remote_target::remote_kill_k ()
9768 /* Catch errors so the user can quit from gdb even when we
9769 aren't on speaking terms with the remote system. */
9774 catch (const gdb_exception_error
&ex
)
9776 if (ex
.error
== TARGET_CLOSE_ERROR
)
9778 /* If we got an (EOF) error that caused the target
9779 to go away, then we're done, that's what we wanted.
9780 "k" is susceptible to cause a premature EOF, given
9781 that the remote server isn't actually required to
9782 reply to "k", and it can happen that it doesn't
9783 even get to reply ACK to the "k". */
9787 /* Otherwise, something went wrong. We didn't actually kill
9788 the target. Just propagate the exception, and let the
9789 user or higher layers decide what to do. */
9795 remote_target::mourn_inferior ()
9797 struct remote_state
*rs
= get_remote_state ();
9799 /* We're no longer interested in notification events of an inferior
9800 that exited or was killed/detached. */
9801 discard_pending_stop_replies (current_inferior ());
9803 /* In 'target remote' mode with one inferior, we close the connection. */
9804 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9806 unpush_target (this);
9808 /* remote_close takes care of doing most of the clean up. */
9809 generic_mourn_inferior ();
9813 /* In case we got here due to an error, but we're going to stay
9815 rs
->waiting_for_stop_reply
= 0;
9817 /* If the current general thread belonged to the process we just
9818 detached from or has exited, the remote side current general
9819 thread becomes undefined. Considering a case like this:
9821 - We just got here due to a detach.
9822 - The process that we're detaching from happens to immediately
9823 report a global breakpoint being hit in non-stop mode, in the
9824 same thread we had selected before.
9825 - GDB attaches to this process again.
9826 - This event happens to be the next event we handle.
9828 GDB would consider that the current general thread didn't need to
9829 be set on the stub side (with Hg), since for all it knew,
9830 GENERAL_THREAD hadn't changed.
9832 Notice that although in all-stop mode, the remote server always
9833 sets the current thread to the thread reporting the stop event,
9834 that doesn't happen in non-stop mode; in non-stop, the stub *must
9835 not* change the current thread when reporting a breakpoint hit,
9836 due to the decoupling of event reporting and event handling.
9838 To keep things simple, we always invalidate our notion of the
9840 record_currthread (rs
, minus_one_ptid
);
9842 /* Call common code to mark the inferior as not running. */
9843 generic_mourn_inferior ();
9845 if (!have_inferiors ())
9847 if (!remote_multi_process_p (rs
))
9849 /* Check whether the target is running now - some remote stubs
9850 automatically restart after kill. */
9852 getpkt (&rs
->buf
, 0);
9854 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9856 /* Assume that the target has been restarted. Set
9857 inferior_ptid so that bits of core GDB realizes
9858 there's something here, e.g., so that the user can
9859 say "kill" again. */
9860 inferior_ptid
= magic_null_ptid
;
9867 extended_remote_target::supports_disable_randomization ()
9869 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9873 remote_target::extended_remote_disable_randomization (int val
)
9875 struct remote_state
*rs
= get_remote_state ();
9878 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
9879 "QDisableRandomization:%x", val
);
9881 reply
= remote_get_noisy_reply ();
9883 error (_("Target does not support QDisableRandomization."));
9884 if (strcmp (reply
, "OK") != 0)
9885 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9889 remote_target::extended_remote_run (const std::string
&args
)
9891 struct remote_state
*rs
= get_remote_state ();
9893 const char *remote_exec_file
= get_remote_exec_file ();
9895 /* If the user has disabled vRun support, or we have detected that
9896 support is not available, do not try it. */
9897 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9900 strcpy (rs
->buf
.data (), "vRun;");
9901 len
= strlen (rs
->buf
.data ());
9903 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9904 error (_("Remote file name too long for run packet"));
9905 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
9906 strlen (remote_exec_file
));
9912 gdb_argv
argv (args
.c_str ());
9913 for (i
= 0; argv
[i
] != NULL
; i
++)
9915 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9916 error (_("Argument list too long for run packet"));
9917 rs
->buf
[len
++] = ';';
9918 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
9923 rs
->buf
[len
++] = '\0';
9926 getpkt (&rs
->buf
, 0);
9928 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9931 /* We have a wait response. All is well. */
9933 case PACKET_UNKNOWN
:
9936 if (remote_exec_file
[0] == '\0')
9937 error (_("Running the default executable on the remote target failed; "
9938 "try \"set remote exec-file\"?"));
9940 error (_("Running \"%s\" on the remote target failed"),
9943 gdb_assert_not_reached (_("bad switch"));
9947 /* Helper function to send set/unset environment packets. ACTION is
9948 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9949 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9953 remote_target::send_environment_packet (const char *action
,
9957 remote_state
*rs
= get_remote_state ();
9959 /* Convert the environment variable to an hex string, which
9960 is the best format to be transmitted over the wire. */
9961 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
9964 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
9965 "%s:%s", packet
, encoded_value
.c_str ());
9968 getpkt (&rs
->buf
, 0);
9969 if (strcmp (rs
->buf
.data (), "OK") != 0)
9970 warning (_("Unable to %s environment variable '%s' on remote."),
9974 /* Helper function to handle the QEnvironment* packets. */
9977 remote_target::extended_remote_environment_support ()
9979 remote_state
*rs
= get_remote_state ();
9981 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
9983 putpkt ("QEnvironmentReset");
9984 getpkt (&rs
->buf
, 0);
9985 if (strcmp (rs
->buf
.data (), "OK") != 0)
9986 warning (_("Unable to reset environment on remote."));
9989 gdb_environ
*e
= ¤t_inferior ()->environment
;
9991 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
9992 for (const std::string
&el
: e
->user_set_env ())
9993 send_environment_packet ("set", "QEnvironmentHexEncoded",
9996 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
9997 for (const std::string
&el
: e
->user_unset_env ())
9998 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10001 /* Helper function to set the current working directory for the
10002 inferior in the remote target. */
10005 remote_target::extended_remote_set_inferior_cwd ()
10007 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10009 const char *inferior_cwd
= get_inferior_cwd ();
10010 remote_state
*rs
= get_remote_state ();
10012 if (inferior_cwd
!= NULL
)
10014 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10015 strlen (inferior_cwd
));
10017 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10018 "QSetWorkingDir:%s", hexpath
.c_str ());
10022 /* An empty inferior_cwd means that the user wants us to
10023 reset the remote server's inferior's cwd. */
10024 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10025 "QSetWorkingDir:");
10029 getpkt (&rs
->buf
, 0);
10030 if (packet_ok (rs
->buf
,
10031 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10034 Remote replied unexpectedly while setting the inferior's working\n\
10041 /* In the extended protocol we want to be able to do things like
10042 "run" and have them basically work as expected. So we need
10043 a special create_inferior function. We support changing the
10044 executable file and the command line arguments, but not the
10048 extended_remote_target::create_inferior (const char *exec_file
,
10049 const std::string
&args
,
10050 char **env
, int from_tty
)
10054 struct remote_state
*rs
= get_remote_state ();
10055 const char *remote_exec_file
= get_remote_exec_file ();
10057 /* If running asynchronously, register the target file descriptor
10058 with the event loop. */
10059 if (target_can_async_p ())
10062 /* Disable address space randomization if requested (and supported). */
10063 if (supports_disable_randomization ())
10064 extended_remote_disable_randomization (disable_randomization
);
10066 /* If startup-with-shell is on, we inform gdbserver to start the
10067 remote inferior using a shell. */
10068 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10070 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10071 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10073 getpkt (&rs
->buf
, 0);
10074 if (strcmp (rs
->buf
.data (), "OK") != 0)
10076 Remote replied unexpectedly while setting startup-with-shell: %s"),
10080 extended_remote_environment_support ();
10082 extended_remote_set_inferior_cwd ();
10084 /* Now restart the remote server. */
10085 run_worked
= extended_remote_run (args
) != -1;
10088 /* vRun was not supported. Fail if we need it to do what the
10090 if (remote_exec_file
[0])
10091 error (_("Remote target does not support \"set remote exec-file\""));
10092 if (!args
.empty ())
10093 error (_("Remote target does not support \"set args\" or run ARGS"));
10095 /* Fall back to "R". */
10096 extended_remote_restart ();
10099 /* vRun's success return is a stop reply. */
10100 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10101 add_current_inferior_and_thread (stop_reply
);
10103 /* Get updated offsets, if the stub uses qOffsets. */
10108 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10109 the list of conditions (in agent expression bytecode format), if any, the
10110 target needs to evaluate. The output is placed into the packet buffer
10111 started from BUF and ended at BUF_END. */
10114 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10115 struct bp_target_info
*bp_tgt
, char *buf
,
10118 if (bp_tgt
->conditions
.empty ())
10121 buf
+= strlen (buf
);
10122 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10125 /* Send conditions to the target. */
10126 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10128 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10129 buf
+= strlen (buf
);
10130 for (int i
= 0; i
< aexpr
->len
; ++i
)
10131 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10138 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10139 struct bp_target_info
*bp_tgt
, char *buf
)
10141 if (bp_tgt
->tcommands
.empty ())
10144 buf
+= strlen (buf
);
10146 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10147 buf
+= strlen (buf
);
10149 /* Concatenate all the agent expressions that are commands into the
10151 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10153 sprintf (buf
, "X%x,", aexpr
->len
);
10154 buf
+= strlen (buf
);
10155 for (int i
= 0; i
< aexpr
->len
; ++i
)
10156 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10161 /* Insert a breakpoint. On targets that have software breakpoint
10162 support, we ask the remote target to do the work; on targets
10163 which don't, we insert a traditional memory breakpoint. */
10166 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10167 struct bp_target_info
*bp_tgt
)
10169 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10170 If it succeeds, then set the support to PACKET_ENABLE. If it
10171 fails, and the user has explicitly requested the Z support then
10172 report an error, otherwise, mark it disabled and go on. */
10174 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10176 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10177 struct remote_state
*rs
;
10180 /* Make sure the remote is pointing at the right process, if
10182 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10183 set_general_process ();
10185 rs
= get_remote_state ();
10186 p
= rs
->buf
.data ();
10187 endbuf
= p
+ get_remote_packet_size ();
10192 addr
= (ULONGEST
) remote_address_masked (addr
);
10193 p
+= hexnumstr (p
, addr
);
10194 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10196 if (supports_evaluation_of_breakpoint_conditions ())
10197 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10199 if (can_run_breakpoint_commands ())
10200 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10203 getpkt (&rs
->buf
, 0);
10205 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10211 case PACKET_UNKNOWN
:
10216 /* If this breakpoint has target-side commands but this stub doesn't
10217 support Z0 packets, throw error. */
10218 if (!bp_tgt
->tcommands
.empty ())
10219 throw_error (NOT_SUPPORTED_ERROR
, _("\
10220 Target doesn't support breakpoints that have target side commands."));
10222 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10226 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10227 struct bp_target_info
*bp_tgt
,
10228 enum remove_bp_reason reason
)
10230 CORE_ADDR addr
= bp_tgt
->placed_address
;
10231 struct remote_state
*rs
= get_remote_state ();
10233 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10235 char *p
= rs
->buf
.data ();
10236 char *endbuf
= p
+ get_remote_packet_size ();
10238 /* Make sure the remote is pointing at the right process, if
10240 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10241 set_general_process ();
10247 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10248 p
+= hexnumstr (p
, addr
);
10249 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10252 getpkt (&rs
->buf
, 0);
10254 return (rs
->buf
[0] == 'E');
10257 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10260 static enum Z_packet_type
10261 watchpoint_to_Z_packet (int type
)
10266 return Z_PACKET_WRITE_WP
;
10269 return Z_PACKET_READ_WP
;
10272 return Z_PACKET_ACCESS_WP
;
10275 internal_error (__FILE__
, __LINE__
,
10276 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10281 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10282 enum target_hw_bp_type type
, struct expression
*cond
)
10284 struct remote_state
*rs
= get_remote_state ();
10285 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10287 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10289 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10292 /* Make sure the remote is pointing at the right process, if
10294 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10295 set_general_process ();
10297 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10298 p
= strchr (rs
->buf
.data (), '\0');
10299 addr
= remote_address_masked (addr
);
10300 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10301 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10304 getpkt (&rs
->buf
, 0);
10306 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10310 case PACKET_UNKNOWN
:
10315 internal_error (__FILE__
, __LINE__
,
10316 _("remote_insert_watchpoint: reached end of function"));
10320 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10321 CORE_ADDR start
, int length
)
10323 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10325 return diff
< length
;
10330 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10331 enum target_hw_bp_type type
, struct expression
*cond
)
10333 struct remote_state
*rs
= get_remote_state ();
10334 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10336 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10338 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10341 /* Make sure the remote is pointing at the right process, if
10343 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10344 set_general_process ();
10346 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10347 p
= strchr (rs
->buf
.data (), '\0');
10348 addr
= remote_address_masked (addr
);
10349 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10350 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10352 getpkt (&rs
->buf
, 0);
10354 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10357 case PACKET_UNKNOWN
:
10362 internal_error (__FILE__
, __LINE__
,
10363 _("remote_remove_watchpoint: reached end of function"));
10367 static int remote_hw_watchpoint_limit
= -1;
10368 static int remote_hw_watchpoint_length_limit
= -1;
10369 static int remote_hw_breakpoint_limit
= -1;
10372 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10374 if (remote_hw_watchpoint_length_limit
== 0)
10376 else if (remote_hw_watchpoint_length_limit
< 0)
10378 else if (len
<= remote_hw_watchpoint_length_limit
)
10385 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10387 if (type
== bp_hardware_breakpoint
)
10389 if (remote_hw_breakpoint_limit
== 0)
10391 else if (remote_hw_breakpoint_limit
< 0)
10393 else if (cnt
<= remote_hw_breakpoint_limit
)
10398 if (remote_hw_watchpoint_limit
== 0)
10400 else if (remote_hw_watchpoint_limit
< 0)
10404 else if (cnt
<= remote_hw_watchpoint_limit
)
10410 /* The to_stopped_by_sw_breakpoint method of target remote. */
10413 remote_target::stopped_by_sw_breakpoint ()
10415 struct thread_info
*thread
= inferior_thread ();
10417 return (thread
->priv
!= NULL
10418 && (get_remote_thread_info (thread
)->stop_reason
10419 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10422 /* The to_supports_stopped_by_sw_breakpoint method of target
10426 remote_target::supports_stopped_by_sw_breakpoint ()
10428 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10431 /* The to_stopped_by_hw_breakpoint method of target remote. */
10434 remote_target::stopped_by_hw_breakpoint ()
10436 struct thread_info
*thread
= inferior_thread ();
10438 return (thread
->priv
!= NULL
10439 && (get_remote_thread_info (thread
)->stop_reason
10440 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10443 /* The to_supports_stopped_by_hw_breakpoint method of target
10447 remote_target::supports_stopped_by_hw_breakpoint ()
10449 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10453 remote_target::stopped_by_watchpoint ()
10455 struct thread_info
*thread
= inferior_thread ();
10457 return (thread
->priv
!= NULL
10458 && (get_remote_thread_info (thread
)->stop_reason
10459 == TARGET_STOPPED_BY_WATCHPOINT
));
10463 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10465 struct thread_info
*thread
= inferior_thread ();
10467 if (thread
->priv
!= NULL
10468 && (get_remote_thread_info (thread
)->stop_reason
10469 == TARGET_STOPPED_BY_WATCHPOINT
))
10471 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10480 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10481 struct bp_target_info
*bp_tgt
)
10483 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10484 struct remote_state
*rs
;
10488 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10491 /* Make sure the remote is pointing at the right process, if
10493 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10494 set_general_process ();
10496 rs
= get_remote_state ();
10497 p
= rs
->buf
.data ();
10498 endbuf
= p
+ get_remote_packet_size ();
10504 addr
= remote_address_masked (addr
);
10505 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10506 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10508 if (supports_evaluation_of_breakpoint_conditions ())
10509 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10511 if (can_run_breakpoint_commands ())
10512 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10515 getpkt (&rs
->buf
, 0);
10517 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10520 if (rs
->buf
[1] == '.')
10522 message
= strchr (&rs
->buf
[2], '.');
10524 error (_("Remote failure reply: %s"), message
+ 1);
10527 case PACKET_UNKNOWN
:
10532 internal_error (__FILE__
, __LINE__
,
10533 _("remote_insert_hw_breakpoint: reached end of function"));
10538 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10539 struct bp_target_info
*bp_tgt
)
10542 struct remote_state
*rs
= get_remote_state ();
10543 char *p
= rs
->buf
.data ();
10544 char *endbuf
= p
+ get_remote_packet_size ();
10546 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10549 /* Make sure the remote is pointing at the right process, if
10551 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10552 set_general_process ();
10558 addr
= remote_address_masked (bp_tgt
->placed_address
);
10559 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10560 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10563 getpkt (&rs
->buf
, 0);
10565 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10568 case PACKET_UNKNOWN
:
10573 internal_error (__FILE__
, __LINE__
,
10574 _("remote_remove_hw_breakpoint: reached end of function"));
10577 /* Verify memory using the "qCRC:" request. */
10580 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10582 struct remote_state
*rs
= get_remote_state ();
10583 unsigned long host_crc
, target_crc
;
10586 /* It doesn't make sense to use qCRC if the remote target is
10587 connected but not running. */
10588 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10590 enum packet_result result
;
10592 /* Make sure the remote is pointing at the right process. */
10593 set_general_process ();
10595 /* FIXME: assumes lma can fit into long. */
10596 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10597 (long) lma
, (long) size
);
10600 /* Be clever; compute the host_crc before waiting for target
10602 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10604 getpkt (&rs
->buf
, 0);
10606 result
= packet_ok (rs
->buf
,
10607 &remote_protocol_packets
[PACKET_qCRC
]);
10608 if (result
== PACKET_ERROR
)
10610 else if (result
== PACKET_OK
)
10612 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10613 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10615 return (host_crc
== target_crc
);
10619 return simple_verify_memory (this, data
, lma
, size
);
10622 /* compare-sections command
10624 With no arguments, compares each loadable section in the exec bfd
10625 with the same memory range on the target, and reports mismatches.
10626 Useful for verifying the image on the target against the exec file. */
10629 compare_sections_command (const char *args
, int from_tty
)
10632 const char *sectname
;
10633 bfd_size_type size
;
10636 int mismatched
= 0;
10641 error (_("command cannot be used without an exec file"));
10643 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10649 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10651 if (!(s
->flags
& SEC_LOAD
))
10652 continue; /* Skip non-loadable section. */
10654 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10655 continue; /* Skip writeable sections */
10657 size
= bfd_section_size (s
);
10659 continue; /* Skip zero-length section. */
10661 sectname
= bfd_section_name (s
);
10662 if (args
&& strcmp (args
, sectname
) != 0)
10663 continue; /* Not the section selected by user. */
10665 matched
= 1; /* Do this section. */
10668 gdb::byte_vector
sectdata (size
);
10669 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10671 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10674 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10675 paddress (target_gdbarch (), lma
),
10676 paddress (target_gdbarch (), lma
+ size
));
10678 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10679 paddress (target_gdbarch (), lma
),
10680 paddress (target_gdbarch (), lma
+ size
));
10682 printf_filtered ("matched.\n");
10685 printf_filtered ("MIS-MATCHED!\n");
10689 if (mismatched
> 0)
10690 warning (_("One or more sections of the target image does not match\n\
10691 the loaded file\n"));
10692 if (args
&& !matched
)
10693 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10696 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10697 into remote target. The number of bytes written to the remote
10698 target is returned, or -1 for error. */
10701 remote_target::remote_write_qxfer (const char *object_name
,
10702 const char *annex
, const gdb_byte
*writebuf
,
10703 ULONGEST offset
, LONGEST len
,
10704 ULONGEST
*xfered_len
,
10705 struct packet_config
*packet
)
10709 struct remote_state
*rs
= get_remote_state ();
10710 int max_size
= get_memory_write_packet_size ();
10712 if (packet_config_support (packet
) == PACKET_DISABLE
)
10713 return TARGET_XFER_E_IO
;
10715 /* Insert header. */
10716 i
= snprintf (rs
->buf
.data (), max_size
,
10717 "qXfer:%s:write:%s:%s:",
10718 object_name
, annex
? annex
: "",
10719 phex_nz (offset
, sizeof offset
));
10720 max_size
-= (i
+ 1);
10722 /* Escape as much data as fits into rs->buf. */
10723 buf_len
= remote_escape_output
10724 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
10726 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
10727 || getpkt_sane (&rs
->buf
, 0) < 0
10728 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10729 return TARGET_XFER_E_IO
;
10731 unpack_varlen_hex (rs
->buf
.data (), &n
);
10734 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10737 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10738 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10739 number of bytes read is returned, or 0 for EOF, or -1 for error.
10740 The number of bytes read may be less than LEN without indicating an
10741 EOF. PACKET is checked and updated to indicate whether the remote
10742 target supports this object. */
10745 remote_target::remote_read_qxfer (const char *object_name
,
10747 gdb_byte
*readbuf
, ULONGEST offset
,
10749 ULONGEST
*xfered_len
,
10750 struct packet_config
*packet
)
10752 struct remote_state
*rs
= get_remote_state ();
10753 LONGEST i
, n
, packet_len
;
10755 if (packet_config_support (packet
) == PACKET_DISABLE
)
10756 return TARGET_XFER_E_IO
;
10758 /* Check whether we've cached an end-of-object packet that matches
10760 if (rs
->finished_object
)
10762 if (strcmp (object_name
, rs
->finished_object
) == 0
10763 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10764 && offset
== rs
->finished_offset
)
10765 return TARGET_XFER_EOF
;
10768 /* Otherwise, we're now reading something different. Discard
10770 xfree (rs
->finished_object
);
10771 xfree (rs
->finished_annex
);
10772 rs
->finished_object
= NULL
;
10773 rs
->finished_annex
= NULL
;
10776 /* Request only enough to fit in a single packet. The actual data
10777 may not, since we don't know how much of it will need to be escaped;
10778 the target is free to respond with slightly less data. We subtract
10779 five to account for the response type and the protocol frame. */
10780 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10781 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
10782 "qXfer:%s:read:%s:%s,%s",
10783 object_name
, annex
? annex
: "",
10784 phex_nz (offset
, sizeof offset
),
10785 phex_nz (n
, sizeof n
));
10786 i
= putpkt (rs
->buf
);
10788 return TARGET_XFER_E_IO
;
10791 packet_len
= getpkt_sane (&rs
->buf
, 0);
10792 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10793 return TARGET_XFER_E_IO
;
10795 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10796 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
10798 /* 'm' means there is (or at least might be) more data after this
10799 batch. That does not make sense unless there's at least one byte
10800 of data in this reply. */
10801 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10802 error (_("Remote qXfer reply contained no data."));
10804 /* Got some data. */
10805 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
10806 packet_len
- 1, readbuf
, n
);
10808 /* 'l' is an EOF marker, possibly including a final block of data,
10809 or possibly empty. If we have the final block of a non-empty
10810 object, record this fact to bypass a subsequent partial read. */
10811 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10813 rs
->finished_object
= xstrdup (object_name
);
10814 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10815 rs
->finished_offset
= offset
+ i
;
10819 return TARGET_XFER_EOF
;
10823 return TARGET_XFER_OK
;
10827 enum target_xfer_status
10828 remote_target::xfer_partial (enum target_object object
,
10829 const char *annex
, gdb_byte
*readbuf
,
10830 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10831 ULONGEST
*xfered_len
)
10833 struct remote_state
*rs
;
10837 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10839 set_remote_traceframe ();
10840 set_general_thread (inferior_ptid
);
10842 rs
= get_remote_state ();
10844 /* Handle memory using the standard memory routines. */
10845 if (object
== TARGET_OBJECT_MEMORY
)
10847 /* If the remote target is connected but not running, we should
10848 pass this request down to a lower stratum (e.g. the executable
10850 if (!target_has_execution
)
10851 return TARGET_XFER_EOF
;
10853 if (writebuf
!= NULL
)
10854 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10857 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
10861 /* Handle SPU memory using qxfer packets. */
10862 if (object
== TARGET_OBJECT_SPU
)
10865 return remote_read_qxfer ("spu", annex
, readbuf
, offset
, len
,
10866 xfered_len
, &remote_protocol_packets
10867 [PACKET_qXfer_spu_read
]);
10869 return remote_write_qxfer ("spu", annex
, writebuf
, offset
, len
,
10870 xfered_len
, &remote_protocol_packets
10871 [PACKET_qXfer_spu_write
]);
10874 /* Handle extra signal info using qxfer packets. */
10875 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10878 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
10879 xfered_len
, &remote_protocol_packets
10880 [PACKET_qXfer_siginfo_read
]);
10882 return remote_write_qxfer ("siginfo", annex
,
10883 writebuf
, offset
, len
, xfered_len
,
10884 &remote_protocol_packets
10885 [PACKET_qXfer_siginfo_write
]);
10888 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10891 return remote_read_qxfer ("statictrace", annex
,
10892 readbuf
, offset
, len
, xfered_len
,
10893 &remote_protocol_packets
10894 [PACKET_qXfer_statictrace_read
]);
10896 return TARGET_XFER_E_IO
;
10899 /* Only handle flash writes. */
10900 if (writebuf
!= NULL
)
10904 case TARGET_OBJECT_FLASH
:
10905 return remote_flash_write (offset
, len
, xfered_len
,
10909 return TARGET_XFER_E_IO
;
10913 /* Map pre-existing objects onto letters. DO NOT do this for new
10914 objects!!! Instead specify new query packets. */
10917 case TARGET_OBJECT_AVR
:
10921 case TARGET_OBJECT_AUXV
:
10922 gdb_assert (annex
== NULL
);
10923 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
10925 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10927 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10928 return remote_read_qxfer
10929 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
10930 &remote_protocol_packets
[PACKET_qXfer_features
]);
10932 case TARGET_OBJECT_LIBRARIES
:
10933 return remote_read_qxfer
10934 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10935 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10937 case TARGET_OBJECT_LIBRARIES_SVR4
:
10938 return remote_read_qxfer
10939 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10940 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10942 case TARGET_OBJECT_MEMORY_MAP
:
10943 gdb_assert (annex
== NULL
);
10944 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
10946 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10948 case TARGET_OBJECT_OSDATA
:
10949 /* Should only get here if we're connected. */
10950 gdb_assert (rs
->remote_desc
);
10951 return remote_read_qxfer
10952 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10953 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10955 case TARGET_OBJECT_THREADS
:
10956 gdb_assert (annex
== NULL
);
10957 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
10959 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10961 case TARGET_OBJECT_TRACEFRAME_INFO
:
10962 gdb_assert (annex
== NULL
);
10963 return remote_read_qxfer
10964 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10965 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10967 case TARGET_OBJECT_FDPIC
:
10968 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
10970 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10972 case TARGET_OBJECT_OPENVMS_UIB
:
10973 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
10975 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10977 case TARGET_OBJECT_BTRACE
:
10978 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
10980 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10982 case TARGET_OBJECT_BTRACE_CONF
:
10983 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
10985 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10987 case TARGET_OBJECT_EXEC_FILE
:
10988 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
10990 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10993 return TARGET_XFER_E_IO
;
10996 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10997 large enough let the caller deal with it. */
10998 if (len
< get_remote_packet_size ())
10999 return TARGET_XFER_E_IO
;
11000 len
= get_remote_packet_size ();
11002 /* Except for querying the minimum buffer size, target must be open. */
11003 if (!rs
->remote_desc
)
11004 error (_("remote query is only available after target open"));
11006 gdb_assert (annex
!= NULL
);
11007 gdb_assert (readbuf
!= NULL
);
11009 p2
= rs
->buf
.data ();
11011 *p2
++ = query_type
;
11013 /* We used one buffer char for the remote protocol q command and
11014 another for the query type. As the remote protocol encapsulation
11015 uses 4 chars plus one extra in case we are debugging
11016 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11019 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11021 /* Bad caller may have sent forbidden characters. */
11022 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11027 gdb_assert (annex
[i
] == '\0');
11029 i
= putpkt (rs
->buf
);
11031 return TARGET_XFER_E_IO
;
11033 getpkt (&rs
->buf
, 0);
11034 strcpy ((char *) readbuf
, rs
->buf
.data ());
11036 *xfered_len
= strlen ((char *) readbuf
);
11037 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11040 /* Implementation of to_get_memory_xfer_limit. */
11043 remote_target::get_memory_xfer_limit ()
11045 return get_memory_write_packet_size ();
11049 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11050 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11051 CORE_ADDR
*found_addrp
)
11053 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11054 struct remote_state
*rs
= get_remote_state ();
11055 int max_size
= get_memory_write_packet_size ();
11056 struct packet_config
*packet
=
11057 &remote_protocol_packets
[PACKET_qSearch_memory
];
11058 /* Number of packet bytes used to encode the pattern;
11059 this could be more than PATTERN_LEN due to escape characters. */
11060 int escaped_pattern_len
;
11061 /* Amount of pattern that was encodable in the packet. */
11062 int used_pattern_len
;
11065 ULONGEST found_addr
;
11067 /* Don't go to the target if we don't have to. This is done before
11068 checking packet_config_support to avoid the possibility that a
11069 success for this edge case means the facility works in
11071 if (pattern_len
> search_space_len
)
11073 if (pattern_len
== 0)
11075 *found_addrp
= start_addr
;
11079 /* If we already know the packet isn't supported, fall back to the simple
11080 way of searching memory. */
11082 if (packet_config_support (packet
) == PACKET_DISABLE
)
11084 /* Target doesn't provided special support, fall back and use the
11085 standard support (copy memory and do the search here). */
11086 return simple_search_memory (this, start_addr
, search_space_len
,
11087 pattern
, pattern_len
, found_addrp
);
11090 /* Make sure the remote is pointing at the right process. */
11091 set_general_process ();
11093 /* Insert header. */
11094 i
= snprintf (rs
->buf
.data (), max_size
,
11095 "qSearch:memory:%s;%s;",
11096 phex_nz (start_addr
, addr_size
),
11097 phex_nz (search_space_len
, sizeof (search_space_len
)));
11098 max_size
-= (i
+ 1);
11100 /* Escape as much data as fits into rs->buf. */
11101 escaped_pattern_len
=
11102 remote_escape_output (pattern
, pattern_len
, 1,
11103 (gdb_byte
*) rs
->buf
.data () + i
,
11104 &used_pattern_len
, max_size
);
11106 /* Bail if the pattern is too large. */
11107 if (used_pattern_len
!= pattern_len
)
11108 error (_("Pattern is too large to transmit to remote target."));
11110 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11111 || getpkt_sane (&rs
->buf
, 0) < 0
11112 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11114 /* The request may not have worked because the command is not
11115 supported. If so, fall back to the simple way. */
11116 if (packet_config_support (packet
) == PACKET_DISABLE
)
11118 return simple_search_memory (this, start_addr
, search_space_len
,
11119 pattern
, pattern_len
, found_addrp
);
11124 if (rs
->buf
[0] == '0')
11126 else if (rs
->buf
[0] == '1')
11129 if (rs
->buf
[1] != ',')
11130 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11131 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11132 *found_addrp
= found_addr
;
11135 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11141 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11143 struct remote_state
*rs
= get_remote_state ();
11144 char *p
= rs
->buf
.data ();
11146 if (!rs
->remote_desc
)
11147 error (_("remote rcmd is only available after target open"));
11149 /* Send a NULL command across as an empty command. */
11150 if (command
== NULL
)
11153 /* The query prefix. */
11154 strcpy (rs
->buf
.data (), "qRcmd,");
11155 p
= strchr (rs
->buf
.data (), '\0');
11157 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11158 > get_remote_packet_size ())
11159 error (_("\"monitor\" command ``%s'' is too long."), command
);
11161 /* Encode the actual command. */
11162 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11164 if (putpkt (rs
->buf
) < 0)
11165 error (_("Communication problem with target."));
11167 /* get/display the response */
11172 /* XXX - see also remote_get_noisy_reply(). */
11173 QUIT
; /* Allow user to bail out with ^C. */
11175 if (getpkt_sane (&rs
->buf
, 0) == -1)
11177 /* Timeout. Continue to (try to) read responses.
11178 This is better than stopping with an error, assuming the stub
11179 is still executing the (long) monitor command.
11180 If needed, the user can interrupt gdb using C-c, obtaining
11181 an effect similar to stop on timeout. */
11184 buf
= rs
->buf
.data ();
11185 if (buf
[0] == '\0')
11186 error (_("Target does not support this command."));
11187 if (buf
[0] == 'O' && buf
[1] != 'K')
11189 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11192 if (strcmp (buf
, "OK") == 0)
11194 if (strlen (buf
) == 3 && buf
[0] == 'E'
11195 && isdigit (buf
[1]) && isdigit (buf
[2]))
11197 error (_("Protocol error with Rcmd"));
11199 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11201 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11203 fputc_unfiltered (c
, outbuf
);
11209 std::vector
<mem_region
>
11210 remote_target::memory_map ()
11212 std::vector
<mem_region
> result
;
11213 gdb::optional
<gdb::char_vector
> text
11214 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP
, NULL
);
11217 result
= parse_memory_map (text
->data ());
11223 packet_command (const char *args
, int from_tty
)
11225 remote_target
*remote
= get_current_remote_target ();
11227 if (remote
== nullptr)
11228 error (_("command can only be used with remote target"));
11230 remote
->packet_command (args
, from_tty
);
11234 remote_target::packet_command (const char *args
, int from_tty
)
11237 error (_("remote-packet command requires packet text as argument"));
11239 puts_filtered ("sending: ");
11240 print_packet (args
);
11241 puts_filtered ("\n");
11244 remote_state
*rs
= get_remote_state ();
11246 getpkt (&rs
->buf
, 0);
11247 puts_filtered ("received: ");
11248 print_packet (rs
->buf
.data ());
11249 puts_filtered ("\n");
11253 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11255 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11257 static void threadset_test_cmd (char *cmd
, int tty
);
11259 static void threadalive_test (char *cmd
, int tty
);
11261 static void threadlist_test_cmd (char *cmd
, int tty
);
11263 int get_and_display_threadinfo (threadref
*ref
);
11265 static void threadinfo_test_cmd (char *cmd
, int tty
);
11267 static int thread_display_step (threadref
*ref
, void *context
);
11269 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11271 static void init_remote_threadtests (void);
11273 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11276 threadset_test_cmd (const char *cmd
, int tty
)
11278 int sample_thread
= SAMPLE_THREAD
;
11280 printf_filtered (_("Remote threadset test\n"));
11281 set_general_thread (sample_thread
);
11286 threadalive_test (const char *cmd
, int tty
)
11288 int sample_thread
= SAMPLE_THREAD
;
11289 int pid
= inferior_ptid
.pid ();
11290 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11292 if (remote_thread_alive (ptid
))
11293 printf_filtered ("PASS: Thread alive test\n");
11295 printf_filtered ("FAIL: Thread alive test\n");
11298 void output_threadid (char *title
, threadref
*ref
);
11301 output_threadid (char *title
, threadref
*ref
)
11305 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
11307 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11311 threadlist_test_cmd (const char *cmd
, int tty
)
11314 threadref nextthread
;
11315 int done
, result_count
;
11316 threadref threadlist
[3];
11318 printf_filtered ("Remote Threadlist test\n");
11319 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11320 &result_count
, &threadlist
[0]))
11321 printf_filtered ("FAIL: threadlist test\n");
11324 threadref
*scan
= threadlist
;
11325 threadref
*limit
= scan
+ result_count
;
11327 while (scan
< limit
)
11328 output_threadid (" thread ", scan
++);
11333 display_thread_info (struct gdb_ext_thread_info
*info
)
11335 output_threadid ("Threadid: ", &info
->threadid
);
11336 printf_filtered ("Name: %s\n ", info
->shortname
);
11337 printf_filtered ("State: %s\n", info
->display
);
11338 printf_filtered ("other: %s\n\n", info
->more_display
);
11342 get_and_display_threadinfo (threadref
*ref
)
11346 struct gdb_ext_thread_info threadinfo
;
11348 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11349 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11350 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11351 display_thread_info (&threadinfo
);
11356 threadinfo_test_cmd (const char *cmd
, int tty
)
11358 int athread
= SAMPLE_THREAD
;
11362 int_to_threadref (&thread
, athread
);
11363 printf_filtered ("Remote Threadinfo test\n");
11364 if (!get_and_display_threadinfo (&thread
))
11365 printf_filtered ("FAIL cannot get thread info\n");
11369 thread_display_step (threadref
*ref
, void *context
)
11371 /* output_threadid(" threadstep ",ref); *//* simple test */
11372 return get_and_display_threadinfo (ref
);
11376 threadlist_update_test_cmd (const char *cmd
, int tty
)
11378 printf_filtered ("Remote Threadlist update test\n");
11379 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11383 init_remote_threadtests (void)
11385 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11386 _("Fetch and print the remote list of "
11387 "thread identifiers, one pkt only."));
11388 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11389 _("Fetch and display info about one thread."));
11390 add_com ("tset", class_obscure
, threadset_test_cmd
,
11391 _("Test setting to a different thread."));
11392 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11393 _("Iterate through updating all remote thread info."));
11394 add_com ("talive", class_obscure
, threadalive_test
,
11395 _("Remote thread alive test."));
11400 /* Convert a thread ID to a string. */
11403 remote_target::pid_to_str (ptid_t ptid
)
11405 struct remote_state
*rs
= get_remote_state ();
11407 if (ptid
== null_ptid
)
11408 return normal_pid_to_str (ptid
);
11409 else if (ptid
.is_pid ())
11411 /* Printing an inferior target id. */
11413 /* When multi-process extensions are off, there's no way in the
11414 remote protocol to know the remote process id, if there's any
11415 at all. There's one exception --- when we're connected with
11416 target extended-remote, and we manually attached to a process
11417 with "attach PID". We don't record anywhere a flag that
11418 allows us to distinguish that case from the case of
11419 connecting with extended-remote and the stub already being
11420 attached to a process, and reporting yes to qAttached, hence
11421 no smart special casing here. */
11422 if (!remote_multi_process_p (rs
))
11423 return "Remote target";
11425 return normal_pid_to_str (ptid
);
11429 if (magic_null_ptid
== ptid
)
11430 return "Thread <main>";
11431 else if (remote_multi_process_p (rs
))
11432 if (ptid
.lwp () == 0)
11433 return normal_pid_to_str (ptid
);
11435 return string_printf ("Thread %d.%ld",
11436 ptid
.pid (), ptid
.lwp ());
11438 return string_printf ("Thread %ld", ptid
.lwp ());
11442 /* Get the address of the thread local variable in OBJFILE which is
11443 stored at OFFSET within the thread local storage for thread PTID. */
11446 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11449 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11451 struct remote_state
*rs
= get_remote_state ();
11452 char *p
= rs
->buf
.data ();
11453 char *endp
= p
+ get_remote_packet_size ();
11454 enum packet_result result
;
11456 strcpy (p
, "qGetTLSAddr:");
11458 p
= write_ptid (p
, endp
, ptid
);
11460 p
+= hexnumstr (p
, offset
);
11462 p
+= hexnumstr (p
, lm
);
11466 getpkt (&rs
->buf
, 0);
11467 result
= packet_ok (rs
->buf
,
11468 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11469 if (result
== PACKET_OK
)
11473 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11476 else if (result
== PACKET_UNKNOWN
)
11477 throw_error (TLS_GENERIC_ERROR
,
11478 _("Remote target doesn't support qGetTLSAddr packet"));
11480 throw_error (TLS_GENERIC_ERROR
,
11481 _("Remote target failed to process qGetTLSAddr request"));
11484 throw_error (TLS_GENERIC_ERROR
,
11485 _("TLS not supported or disabled on this target"));
11490 /* Provide thread local base, i.e. Thread Information Block address.
11491 Returns 1 if ptid is found and thread_local_base is non zero. */
11494 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11496 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11498 struct remote_state
*rs
= get_remote_state ();
11499 char *p
= rs
->buf
.data ();
11500 char *endp
= p
+ get_remote_packet_size ();
11501 enum packet_result result
;
11503 strcpy (p
, "qGetTIBAddr:");
11505 p
= write_ptid (p
, endp
, ptid
);
11509 getpkt (&rs
->buf
, 0);
11510 result
= packet_ok (rs
->buf
,
11511 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11512 if (result
== PACKET_OK
)
11515 unpack_varlen_hex (rs
->buf
.data (), &val
);
11517 *addr
= (CORE_ADDR
) val
;
11520 else if (result
== PACKET_UNKNOWN
)
11521 error (_("Remote target doesn't support qGetTIBAddr packet"));
11523 error (_("Remote target failed to process qGetTIBAddr request"));
11526 error (_("qGetTIBAddr not supported or disabled on this target"));
11531 /* Support for inferring a target description based on the current
11532 architecture and the size of a 'g' packet. While the 'g' packet
11533 can have any size (since optional registers can be left off the
11534 end), some sizes are easily recognizable given knowledge of the
11535 approximate architecture. */
11537 struct remote_g_packet_guess
11539 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11546 const struct target_desc
*tdesc
;
11549 struct remote_g_packet_data
: public allocate_on_obstack
11551 std::vector
<remote_g_packet_guess
> guesses
;
11554 static struct gdbarch_data
*remote_g_packet_data_handle
;
11557 remote_g_packet_data_init (struct obstack
*obstack
)
11559 return new (obstack
) remote_g_packet_data
;
11563 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11564 const struct target_desc
*tdesc
)
11566 struct remote_g_packet_data
*data
11567 = ((struct remote_g_packet_data
*)
11568 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11570 gdb_assert (tdesc
!= NULL
);
11572 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11573 if (guess
.bytes
== bytes
)
11574 internal_error (__FILE__
, __LINE__
,
11575 _("Duplicate g packet description added for size %d"),
11578 data
->guesses
.emplace_back (bytes
, tdesc
);
11581 /* Return true if remote_read_description would do anything on this target
11582 and architecture, false otherwise. */
11585 remote_read_description_p (struct target_ops
*target
)
11587 struct remote_g_packet_data
*data
11588 = ((struct remote_g_packet_data
*)
11589 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11591 return !data
->guesses
.empty ();
11594 const struct target_desc
*
11595 remote_target::read_description ()
11597 struct remote_g_packet_data
*data
11598 = ((struct remote_g_packet_data
*)
11599 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11601 /* Do not try this during initial connection, when we do not know
11602 whether there is a running but stopped thread. */
11603 if (!target_has_execution
|| inferior_ptid
== null_ptid
)
11604 return beneath ()->read_description ();
11606 if (!data
->guesses
.empty ())
11608 int bytes
= send_g_packet ();
11610 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11611 if (guess
.bytes
== bytes
)
11612 return guess
.tdesc
;
11614 /* We discard the g packet. A minor optimization would be to
11615 hold on to it, and fill the register cache once we have selected
11616 an architecture, but it's too tricky to do safely. */
11619 return beneath ()->read_description ();
11622 /* Remote file transfer support. This is host-initiated I/O, not
11623 target-initiated; for target-initiated, see remote-fileio.c. */
11625 /* If *LEFT is at least the length of STRING, copy STRING to
11626 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11627 decrease *LEFT. Otherwise raise an error. */
11630 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11632 int len
= strlen (string
);
11635 error (_("Packet too long for target."));
11637 memcpy (*buffer
, string
, len
);
11641 /* NUL-terminate the buffer as a convenience, if there is
11647 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11648 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11649 decrease *LEFT. Otherwise raise an error. */
11652 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11655 if (2 * len
> *left
)
11656 error (_("Packet too long for target."));
11658 bin2hex (bytes
, *buffer
, len
);
11659 *buffer
+= 2 * len
;
11662 /* NUL-terminate the buffer as a convenience, if there is
11668 /* If *LEFT is large enough, convert VALUE to hex and add it to
11669 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11670 decrease *LEFT. Otherwise raise an error. */
11673 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11675 int len
= hexnumlen (value
);
11678 error (_("Packet too long for target."));
11680 hexnumstr (*buffer
, value
);
11684 /* NUL-terminate the buffer as a convenience, if there is
11690 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11691 value, *REMOTE_ERRNO to the remote error number or zero if none
11692 was included, and *ATTACHMENT to point to the start of the annex
11693 if any. The length of the packet isn't needed here; there may
11694 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11696 Return 0 if the packet could be parsed, -1 if it could not. If
11697 -1 is returned, the other variables may not be initialized. */
11700 remote_hostio_parse_result (char *buffer
, int *retcode
,
11701 int *remote_errno
, char **attachment
)
11706 *attachment
= NULL
;
11708 if (buffer
[0] != 'F')
11712 *retcode
= strtol (&buffer
[1], &p
, 16);
11713 if (errno
!= 0 || p
== &buffer
[1])
11716 /* Check for ",errno". */
11720 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11721 if (errno
!= 0 || p
+ 1 == p2
)
11726 /* Check for ";attachment". If there is no attachment, the
11727 packet should end here. */
11730 *attachment
= p
+ 1;
11733 else if (*p
== '\0')
11739 /* Send a prepared I/O packet to the target and read its response.
11740 The prepared packet is in the global RS->BUF before this function
11741 is called, and the answer is there when we return.
11743 COMMAND_BYTES is the length of the request to send, which may include
11744 binary data. WHICH_PACKET is the packet configuration to check
11745 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11746 is set to the error number and -1 is returned. Otherwise the value
11747 returned by the function is returned.
11749 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11750 attachment is expected; an error will be reported if there's a
11751 mismatch. If one is found, *ATTACHMENT will be set to point into
11752 the packet buffer and *ATTACHMENT_LEN will be set to the
11753 attachment's length. */
11756 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
11757 int *remote_errno
, char **attachment
,
11758 int *attachment_len
)
11760 struct remote_state
*rs
= get_remote_state ();
11761 int ret
, bytes_read
;
11762 char *attachment_tmp
;
11764 if (packet_support (which_packet
) == PACKET_DISABLE
)
11766 *remote_errno
= FILEIO_ENOSYS
;
11770 putpkt_binary (rs
->buf
.data (), command_bytes
);
11771 bytes_read
= getpkt_sane (&rs
->buf
, 0);
11773 /* If it timed out, something is wrong. Don't try to parse the
11775 if (bytes_read
< 0)
11777 *remote_errno
= FILEIO_EINVAL
;
11781 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11784 *remote_errno
= FILEIO_EINVAL
;
11786 case PACKET_UNKNOWN
:
11787 *remote_errno
= FILEIO_ENOSYS
;
11793 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
11796 *remote_errno
= FILEIO_EINVAL
;
11800 /* Make sure we saw an attachment if and only if we expected one. */
11801 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11802 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11804 *remote_errno
= FILEIO_EINVAL
;
11808 /* If an attachment was found, it must point into the packet buffer;
11809 work out how many bytes there were. */
11810 if (attachment_tmp
!= NULL
)
11812 *attachment
= attachment_tmp
;
11813 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
11819 /* See declaration.h. */
11822 readahead_cache::invalidate ()
11827 /* See declaration.h. */
11830 readahead_cache::invalidate_fd (int fd
)
11832 if (this->fd
== fd
)
11836 /* Set the filesystem remote_hostio functions that take FILENAME
11837 arguments will use. Return 0 on success, or -1 if an error
11838 occurs (and set *REMOTE_ERRNO). */
11841 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
11844 struct remote_state
*rs
= get_remote_state ();
11845 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11846 char *p
= rs
->buf
.data ();
11847 int left
= get_remote_packet_size () - 1;
11851 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11854 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11857 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11859 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11860 remote_buffer_add_string (&p
, &left
, arg
);
11862 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
11863 remote_errno
, NULL
, NULL
);
11865 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11869 rs
->fs_pid
= required_pid
;
11874 /* Implementation of to_fileio_open. */
11877 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
11878 int flags
, int mode
, int warn_if_slow
,
11881 struct remote_state
*rs
= get_remote_state ();
11882 char *p
= rs
->buf
.data ();
11883 int left
= get_remote_packet_size () - 1;
11887 static int warning_issued
= 0;
11889 printf_unfiltered (_("Reading %s from remote target...\n"),
11892 if (!warning_issued
)
11894 warning (_("File transfers from remote targets can be slow."
11895 " Use \"set sysroot\" to access files locally"
11897 warning_issued
= 1;
11901 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11904 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11906 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11907 strlen (filename
));
11908 remote_buffer_add_string (&p
, &left
, ",");
11910 remote_buffer_add_int (&p
, &left
, flags
);
11911 remote_buffer_add_string (&p
, &left
, ",");
11913 remote_buffer_add_int (&p
, &left
, mode
);
11915 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
11916 remote_errno
, NULL
, NULL
);
11920 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
11921 int flags
, int mode
, int warn_if_slow
,
11924 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
11928 /* Implementation of to_fileio_pwrite. */
11931 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
11932 ULONGEST offset
, int *remote_errno
)
11934 struct remote_state
*rs
= get_remote_state ();
11935 char *p
= rs
->buf
.data ();
11936 int left
= get_remote_packet_size ();
11939 rs
->readahead_cache
.invalidate_fd (fd
);
11941 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11943 remote_buffer_add_int (&p
, &left
, fd
);
11944 remote_buffer_add_string (&p
, &left
, ",");
11946 remote_buffer_add_int (&p
, &left
, offset
);
11947 remote_buffer_add_string (&p
, &left
, ",");
11949 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11950 (get_remote_packet_size ()
11951 - (p
- rs
->buf
.data ())));
11953 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
11954 remote_errno
, NULL
, NULL
);
11958 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
11959 ULONGEST offset
, int *remote_errno
)
11961 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
11964 /* Helper for the implementation of to_fileio_pread. Read the file
11965 from the remote side with vFile:pread. */
11968 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
11969 ULONGEST offset
, int *remote_errno
)
11971 struct remote_state
*rs
= get_remote_state ();
11972 char *p
= rs
->buf
.data ();
11974 int left
= get_remote_packet_size ();
11975 int ret
, attachment_len
;
11978 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11980 remote_buffer_add_int (&p
, &left
, fd
);
11981 remote_buffer_add_string (&p
, &left
, ",");
11983 remote_buffer_add_int (&p
, &left
, len
);
11984 remote_buffer_add_string (&p
, &left
, ",");
11986 remote_buffer_add_int (&p
, &left
, offset
);
11988 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
11989 remote_errno
, &attachment
,
11995 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11997 if (read_len
!= ret
)
11998 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12003 /* See declaration.h. */
12006 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12010 && this->offset
<= offset
12011 && offset
< this->offset
+ this->bufsize
)
12013 ULONGEST max
= this->offset
+ this->bufsize
;
12015 if (offset
+ len
> max
)
12016 len
= max
- offset
;
12018 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12025 /* Implementation of to_fileio_pread. */
12028 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12029 ULONGEST offset
, int *remote_errno
)
12032 struct remote_state
*rs
= get_remote_state ();
12033 readahead_cache
*cache
= &rs
->readahead_cache
;
12035 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12038 cache
->hit_count
++;
12041 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
12042 pulongest (cache
->hit_count
));
12046 cache
->miss_count
++;
12048 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
12049 pulongest (cache
->miss_count
));
12052 cache
->offset
= offset
;
12053 cache
->bufsize
= get_remote_packet_size ();
12054 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12056 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12057 cache
->offset
, remote_errno
);
12060 cache
->invalidate_fd (fd
);
12064 cache
->bufsize
= ret
;
12065 return cache
->pread (fd
, read_buf
, len
, offset
);
12069 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12070 ULONGEST offset
, int *remote_errno
)
12072 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12075 /* Implementation of to_fileio_close. */
12078 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12080 struct remote_state
*rs
= get_remote_state ();
12081 char *p
= rs
->buf
.data ();
12082 int left
= get_remote_packet_size () - 1;
12084 rs
->readahead_cache
.invalidate_fd (fd
);
12086 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12088 remote_buffer_add_int (&p
, &left
, fd
);
12090 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12091 remote_errno
, NULL
, NULL
);
12095 remote_target::fileio_close (int fd
, int *remote_errno
)
12097 return remote_hostio_close (fd
, remote_errno
);
12100 /* Implementation of to_fileio_unlink. */
12103 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12106 struct remote_state
*rs
= get_remote_state ();
12107 char *p
= rs
->buf
.data ();
12108 int left
= get_remote_packet_size () - 1;
12110 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12113 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12115 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12116 strlen (filename
));
12118 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12119 remote_errno
, NULL
, NULL
);
12123 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12126 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12129 /* Implementation of to_fileio_readlink. */
12131 gdb::optional
<std::string
>
12132 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12135 struct remote_state
*rs
= get_remote_state ();
12136 char *p
= rs
->buf
.data ();
12138 int left
= get_remote_packet_size ();
12139 int len
, attachment_len
;
12142 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12145 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12147 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12148 strlen (filename
));
12150 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12151 remote_errno
, &attachment
,
12157 std::string
ret (len
, '\0');
12159 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12160 (gdb_byte
*) &ret
[0], len
);
12161 if (read_len
!= len
)
12162 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12167 /* Implementation of to_fileio_fstat. */
12170 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12172 struct remote_state
*rs
= get_remote_state ();
12173 char *p
= rs
->buf
.data ();
12174 int left
= get_remote_packet_size ();
12175 int attachment_len
, ret
;
12177 struct fio_stat fst
;
12180 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12182 remote_buffer_add_int (&p
, &left
, fd
);
12184 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12185 remote_errno
, &attachment
,
12189 if (*remote_errno
!= FILEIO_ENOSYS
)
12192 /* Strictly we should return -1, ENOSYS here, but when
12193 "set sysroot remote:" was implemented in August 2008
12194 BFD's need for a stat function was sidestepped with
12195 this hack. This was not remedied until March 2015
12196 so we retain the previous behavior to avoid breaking
12199 Note that the memset is a March 2015 addition; older
12200 GDBs set st_size *and nothing else* so the structure
12201 would have garbage in all other fields. This might
12202 break something but retaining the previous behavior
12203 here would be just too wrong. */
12205 memset (st
, 0, sizeof (struct stat
));
12206 st
->st_size
= INT_MAX
;
12210 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12211 (gdb_byte
*) &fst
, sizeof (fst
));
12213 if (read_len
!= ret
)
12214 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12216 if (read_len
!= sizeof (fst
))
12217 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12218 read_len
, (int) sizeof (fst
));
12220 remote_fileio_to_host_stat (&fst
, st
);
12225 /* Implementation of to_filesystem_is_local. */
12228 remote_target::filesystem_is_local ()
12230 /* Valgrind GDB presents itself as a remote target but works
12231 on the local filesystem: it does not implement remote get
12232 and users are not expected to set a sysroot. To handle
12233 this case we treat the remote filesystem as local if the
12234 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12235 does not support vFile:open. */
12236 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12238 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12240 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12242 int fd
, remote_errno
;
12244 /* Try opening a file to probe support. The supplied
12245 filename is irrelevant, we only care about whether
12246 the stub recognizes the packet or not. */
12247 fd
= remote_hostio_open (NULL
, "just probing",
12248 FILEIO_O_RDONLY
, 0700, 0,
12252 remote_hostio_close (fd
, &remote_errno
);
12254 ps
= packet_support (PACKET_vFile_open
);
12257 if (ps
== PACKET_DISABLE
)
12259 static int warning_issued
= 0;
12261 if (!warning_issued
)
12263 warning (_("remote target does not support file"
12264 " transfer, attempting to access files"
12265 " from local filesystem."));
12266 warning_issued
= 1;
12277 remote_fileio_errno_to_host (int errnum
)
12283 case FILEIO_ENOENT
:
12291 case FILEIO_EACCES
:
12293 case FILEIO_EFAULT
:
12297 case FILEIO_EEXIST
:
12299 case FILEIO_ENODEV
:
12301 case FILEIO_ENOTDIR
:
12303 case FILEIO_EISDIR
:
12305 case FILEIO_EINVAL
:
12307 case FILEIO_ENFILE
:
12309 case FILEIO_EMFILE
:
12313 case FILEIO_ENOSPC
:
12315 case FILEIO_ESPIPE
:
12319 case FILEIO_ENOSYS
:
12321 case FILEIO_ENAMETOOLONG
:
12322 return ENAMETOOLONG
;
12328 remote_hostio_error (int errnum
)
12330 int host_error
= remote_fileio_errno_to_host (errnum
);
12332 if (host_error
== -1)
12333 error (_("Unknown remote I/O error %d"), errnum
);
12335 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12338 /* A RAII wrapper around a remote file descriptor. */
12340 class scoped_remote_fd
12343 scoped_remote_fd (remote_target
*remote
, int fd
)
12344 : m_remote (remote
), m_fd (fd
)
12348 ~scoped_remote_fd ()
12355 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12359 /* Swallow exception before it escapes the dtor. If
12360 something goes wrong, likely the connection is gone,
12361 and there's nothing else that can be done. */
12366 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12368 /* Release ownership of the file descriptor, and return it. */
12369 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12376 /* Return the owned file descriptor. */
12377 int get () const noexcept
12383 /* The remote target. */
12384 remote_target
*m_remote
;
12386 /* The owned remote I/O file descriptor. */
12391 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12393 remote_target
*remote
= get_current_remote_target ();
12395 if (remote
== nullptr)
12396 error (_("command can only be used with remote target"));
12398 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12402 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12405 int retcode
, remote_errno
, bytes
, io_size
;
12406 int bytes_in_buffer
;
12410 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12412 perror_with_name (local_file
);
12414 scoped_remote_fd fd
12415 (this, remote_hostio_open (NULL
,
12416 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12418 0700, 0, &remote_errno
));
12419 if (fd
.get () == -1)
12420 remote_hostio_error (remote_errno
);
12422 /* Send up to this many bytes at once. They won't all fit in the
12423 remote packet limit, so we'll transfer slightly fewer. */
12424 io_size
= get_remote_packet_size ();
12425 gdb::byte_vector
buffer (io_size
);
12427 bytes_in_buffer
= 0;
12430 while (bytes_in_buffer
|| !saw_eof
)
12434 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12435 io_size
- bytes_in_buffer
,
12439 if (ferror (file
.get ()))
12440 error (_("Error reading %s."), local_file
);
12443 /* EOF. Unless there is something still in the
12444 buffer from the last iteration, we are done. */
12446 if (bytes_in_buffer
== 0)
12454 bytes
+= bytes_in_buffer
;
12455 bytes_in_buffer
= 0;
12457 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12458 offset
, &remote_errno
);
12461 remote_hostio_error (remote_errno
);
12462 else if (retcode
== 0)
12463 error (_("Remote write of %d bytes returned 0!"), bytes
);
12464 else if (retcode
< bytes
)
12466 /* Short write. Save the rest of the read data for the next
12468 bytes_in_buffer
= bytes
- retcode
;
12469 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12475 if (remote_hostio_close (fd
.release (), &remote_errno
))
12476 remote_hostio_error (remote_errno
);
12479 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12483 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12485 remote_target
*remote
= get_current_remote_target ();
12487 if (remote
== nullptr)
12488 error (_("command can only be used with remote target"));
12490 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12494 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12497 int remote_errno
, bytes
, io_size
;
12500 scoped_remote_fd fd
12501 (this, remote_hostio_open (NULL
,
12502 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12504 if (fd
.get () == -1)
12505 remote_hostio_error (remote_errno
);
12507 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12509 perror_with_name (local_file
);
12511 /* Send up to this many bytes at once. They won't all fit in the
12512 remote packet limit, so we'll transfer slightly fewer. */
12513 io_size
= get_remote_packet_size ();
12514 gdb::byte_vector
buffer (io_size
);
12519 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12522 /* Success, but no bytes, means end-of-file. */
12525 remote_hostio_error (remote_errno
);
12529 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12531 perror_with_name (local_file
);
12534 if (remote_hostio_close (fd
.release (), &remote_errno
))
12535 remote_hostio_error (remote_errno
);
12538 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12542 remote_file_delete (const char *remote_file
, int from_tty
)
12544 remote_target
*remote
= get_current_remote_target ();
12546 if (remote
== nullptr)
12547 error (_("command can only be used with remote target"));
12549 remote
->remote_file_delete (remote_file
, from_tty
);
12553 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12555 int retcode
, remote_errno
;
12557 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12559 remote_hostio_error (remote_errno
);
12562 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12566 remote_put_command (const char *args
, int from_tty
)
12569 error_no_arg (_("file to put"));
12571 gdb_argv
argv (args
);
12572 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12573 error (_("Invalid parameters to remote put"));
12575 remote_file_put (argv
[0], argv
[1], from_tty
);
12579 remote_get_command (const char *args
, int from_tty
)
12582 error_no_arg (_("file to get"));
12584 gdb_argv
argv (args
);
12585 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12586 error (_("Invalid parameters to remote get"));
12588 remote_file_get (argv
[0], argv
[1], from_tty
);
12592 remote_delete_command (const char *args
, int from_tty
)
12595 error_no_arg (_("file to delete"));
12597 gdb_argv
argv (args
);
12598 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12599 error (_("Invalid parameters to remote delete"));
12601 remote_file_delete (argv
[0], from_tty
);
12605 remote_command (const char *args
, int from_tty
)
12607 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12611 remote_target::can_execute_reverse ()
12613 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12614 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12621 remote_target::supports_non_stop ()
12627 remote_target::supports_disable_randomization ()
12629 /* Only supported in extended mode. */
12634 remote_target::supports_multi_process ()
12636 struct remote_state
*rs
= get_remote_state ();
12638 return remote_multi_process_p (rs
);
12642 remote_supports_cond_tracepoints ()
12644 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12648 remote_target::supports_evaluation_of_breakpoint_conditions ()
12650 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12654 remote_supports_fast_tracepoints ()
12656 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12660 remote_supports_static_tracepoints ()
12662 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12666 remote_supports_install_in_trace ()
12668 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12672 remote_target::supports_enable_disable_tracepoint ()
12674 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12679 remote_target::supports_string_tracing ()
12681 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12685 remote_target::can_run_breakpoint_commands ()
12687 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12691 remote_target::trace_init ()
12693 struct remote_state
*rs
= get_remote_state ();
12696 remote_get_noisy_reply ();
12697 if (strcmp (rs
->buf
.data (), "OK") != 0)
12698 error (_("Target does not support this command."));
12701 /* Recursive routine to walk through command list including loops, and
12702 download packets for each command. */
12705 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
12706 struct command_line
*cmds
)
12708 struct remote_state
*rs
= get_remote_state ();
12709 struct command_line
*cmd
;
12711 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12713 QUIT
; /* Allow user to bail out with ^C. */
12714 strcpy (rs
->buf
.data (), "QTDPsrc:");
12715 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12716 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12717 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12719 remote_get_noisy_reply ();
12720 if (strcmp (rs
->buf
.data (), "OK"))
12721 warning (_("Target does not support source download."));
12723 if (cmd
->control_type
== while_control
12724 || cmd
->control_type
== while_stepping_control
)
12726 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
12728 QUIT
; /* Allow user to bail out with ^C. */
12729 strcpy (rs
->buf
.data (), "QTDPsrc:");
12730 encode_source_string (num
, addr
, "cmd", "end",
12731 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12732 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12734 remote_get_noisy_reply ();
12735 if (strcmp (rs
->buf
.data (), "OK"))
12736 warning (_("Target does not support source download."));
12742 remote_target::download_tracepoint (struct bp_location
*loc
)
12746 std::vector
<std::string
> tdp_actions
;
12747 std::vector
<std::string
> stepping_actions
;
12749 struct breakpoint
*b
= loc
->owner
;
12750 struct tracepoint
*t
= (struct tracepoint
*) b
;
12751 struct remote_state
*rs
= get_remote_state ();
12753 const char *err_msg
= _("Tracepoint packet too large for target.");
12756 /* We use a buffer other than rs->buf because we'll build strings
12757 across multiple statements, and other statements in between could
12759 gdb::char_vector
buf (get_remote_packet_size ());
12761 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12763 tpaddr
= loc
->address
;
12764 sprintf_vma (addrbuf
, tpaddr
);
12765 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
12766 b
->number
, addrbuf
, /* address */
12767 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12768 t
->step_count
, t
->pass_count
);
12770 if (ret
< 0 || ret
>= buf
.size ())
12771 error ("%s", err_msg
);
12773 /* Fast tracepoints are mostly handled by the target, but we can
12774 tell the target how big of an instruction block should be moved
12776 if (b
->type
== bp_fast_tracepoint
)
12778 /* Only test for support at download time; we may not know
12779 target capabilities at definition time. */
12780 if (remote_supports_fast_tracepoints ())
12782 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12785 size_left
= buf
.size () - strlen (buf
.data ());
12786 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12788 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12790 if (ret
< 0 || ret
>= size_left
)
12791 error ("%s", err_msg
);
12794 /* If it passed validation at definition but fails now,
12795 something is very wrong. */
12796 internal_error (__FILE__
, __LINE__
,
12797 _("Fast tracepoint not "
12798 "valid during download"));
12801 /* Fast tracepoints are functionally identical to regular
12802 tracepoints, so don't take lack of support as a reason to
12803 give up on the trace run. */
12804 warning (_("Target does not support fast tracepoints, "
12805 "downloading %d as regular tracepoint"), b
->number
);
12807 else if (b
->type
== bp_static_tracepoint
)
12809 /* Only test for support at download time; we may not know
12810 target capabilities at definition time. */
12811 if (remote_supports_static_tracepoints ())
12813 struct static_tracepoint_marker marker
;
12815 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12817 size_left
= buf
.size () - strlen (buf
.data ());
12818 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12821 if (ret
< 0 || ret
>= size_left
)
12822 error ("%s", err_msg
);
12825 error (_("Static tracepoint not valid during download"));
12828 /* Fast tracepoints are functionally identical to regular
12829 tracepoints, so don't take lack of support as a reason
12830 to give up on the trace run. */
12831 error (_("Target does not support static tracepoints"));
12833 /* If the tracepoint has a conditional, make it into an agent
12834 expression and append to the definition. */
12837 /* Only test support at download time, we may not know target
12838 capabilities at definition time. */
12839 if (remote_supports_cond_tracepoints ())
12841 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
12844 size_left
= buf
.size () - strlen (buf
.data ());
12846 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12847 size_left
, ":X%x,", aexpr
->len
);
12849 if (ret
< 0 || ret
>= size_left
)
12850 error ("%s", err_msg
);
12852 size_left
= buf
.size () - strlen (buf
.data ());
12854 /* Two bytes to encode each aexpr byte, plus the terminating
12856 if (aexpr
->len
* 2 + 1 > size_left
)
12857 error ("%s", err_msg
);
12859 pkt
= buf
.data () + strlen (buf
.data ());
12861 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12862 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12866 warning (_("Target does not support conditional tracepoints, "
12867 "ignoring tp %d cond"), b
->number
);
12870 if (b
->commands
|| *default_collect
)
12872 size_left
= buf
.size () - strlen (buf
.data ());
12874 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12877 if (ret
< 0 || ret
>= size_left
)
12878 error ("%s", err_msg
);
12881 putpkt (buf
.data ());
12882 remote_get_noisy_reply ();
12883 if (strcmp (rs
->buf
.data (), "OK"))
12884 error (_("Target does not support tracepoints."));
12886 /* do_single_steps (t); */
12887 for (auto action_it
= tdp_actions
.begin ();
12888 action_it
!= tdp_actions
.end (); action_it
++)
12890 QUIT
; /* Allow user to bail out with ^C. */
12892 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
12893 || !stepping_actions
.empty ());
12895 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
12896 b
->number
, addrbuf
, /* address */
12897 action_it
->c_str (),
12898 has_more
? '-' : 0);
12900 if (ret
< 0 || ret
>= buf
.size ())
12901 error ("%s", err_msg
);
12903 putpkt (buf
.data ());
12904 remote_get_noisy_reply ();
12905 if (strcmp (rs
->buf
.data (), "OK"))
12906 error (_("Error on target while setting tracepoints."));
12909 for (auto action_it
= stepping_actions
.begin ();
12910 action_it
!= stepping_actions
.end (); action_it
++)
12912 QUIT
; /* Allow user to bail out with ^C. */
12914 bool is_first
= action_it
== stepping_actions
.begin ();
12915 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
12917 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
12918 b
->number
, addrbuf
, /* address */
12919 is_first
? "S" : "",
12920 action_it
->c_str (),
12921 has_more
? "-" : "");
12923 if (ret
< 0 || ret
>= buf
.size ())
12924 error ("%s", err_msg
);
12926 putpkt (buf
.data ());
12927 remote_get_noisy_reply ();
12928 if (strcmp (rs
->buf
.data (), "OK"))
12929 error (_("Error on target while setting tracepoints."));
12932 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12934 if (b
->location
!= NULL
)
12936 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
12938 if (ret
< 0 || ret
>= buf
.size ())
12939 error ("%s", err_msg
);
12941 encode_source_string (b
->number
, loc
->address
, "at",
12942 event_location_to_string (b
->location
.get ()),
12943 buf
.data () + strlen (buf
.data ()),
12944 buf
.size () - strlen (buf
.data ()));
12945 putpkt (buf
.data ());
12946 remote_get_noisy_reply ();
12947 if (strcmp (rs
->buf
.data (), "OK"))
12948 warning (_("Target does not support source download."));
12950 if (b
->cond_string
)
12952 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
12954 if (ret
< 0 || ret
>= buf
.size ())
12955 error ("%s", err_msg
);
12957 encode_source_string (b
->number
, loc
->address
,
12958 "cond", b
->cond_string
,
12959 buf
.data () + strlen (buf
.data ()),
12960 buf
.size () - strlen (buf
.data ()));
12961 putpkt (buf
.data ());
12962 remote_get_noisy_reply ();
12963 if (strcmp (rs
->buf
.data (), "OK"))
12964 warning (_("Target does not support source download."));
12966 remote_download_command_source (b
->number
, loc
->address
,
12967 breakpoint_commands (b
));
12972 remote_target::can_download_tracepoint ()
12974 struct remote_state
*rs
= get_remote_state ();
12975 struct trace_status
*ts
;
12978 /* Don't try to install tracepoints until we've relocated our
12979 symbols, and fetched and merged the target's tracepoint list with
12981 if (rs
->starting_up
)
12984 ts
= current_trace_status ();
12985 status
= get_trace_status (ts
);
12987 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12990 /* If we are in a tracing experiment, but remote stub doesn't support
12991 installing tracepoint in trace, we have to return. */
12992 if (!remote_supports_install_in_trace ())
13000 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13002 struct remote_state
*rs
= get_remote_state ();
13005 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13006 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13008 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13009 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13010 >= get_remote_packet_size ())
13011 error (_("Trace state variable name too long for tsv definition packet"));
13012 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13015 remote_get_noisy_reply ();
13016 if (rs
->buf
[0] == '\0')
13017 error (_("Target does not support this command."));
13018 if (strcmp (rs
->buf
.data (), "OK") != 0)
13019 error (_("Error on target while downloading trace state variable."));
13023 remote_target::enable_tracepoint (struct bp_location
*location
)
13025 struct remote_state
*rs
= get_remote_state ();
13028 sprintf_vma (addr_buf
, location
->address
);
13029 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13030 location
->owner
->number
, addr_buf
);
13032 remote_get_noisy_reply ();
13033 if (rs
->buf
[0] == '\0')
13034 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13035 if (strcmp (rs
->buf
.data (), "OK") != 0)
13036 error (_("Error on target while enabling tracepoint."));
13040 remote_target::disable_tracepoint (struct bp_location
*location
)
13042 struct remote_state
*rs
= get_remote_state ();
13045 sprintf_vma (addr_buf
, location
->address
);
13046 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13047 location
->owner
->number
, addr_buf
);
13049 remote_get_noisy_reply ();
13050 if (rs
->buf
[0] == '\0')
13051 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13052 if (strcmp (rs
->buf
.data (), "OK") != 0)
13053 error (_("Error on target while disabling tracepoint."));
13057 remote_target::trace_set_readonly_regions ()
13060 bfd_size_type size
;
13066 return; /* No information to give. */
13068 struct remote_state
*rs
= get_remote_state ();
13070 strcpy (rs
->buf
.data (), "QTro");
13071 offset
= strlen (rs
->buf
.data ());
13072 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
13074 char tmp1
[40], tmp2
[40];
13077 if ((s
->flags
& SEC_LOAD
) == 0 ||
13078 /* (s->flags & SEC_CODE) == 0 || */
13079 (s
->flags
& SEC_READONLY
) == 0)
13083 vma
= bfd_section_vma (s
);
13084 size
= bfd_section_size (s
);
13085 sprintf_vma (tmp1
, vma
);
13086 sprintf_vma (tmp2
, vma
+ size
);
13087 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13088 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13090 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13092 Too many sections for read-only sections definition packet."));
13095 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13097 offset
+= sec_length
;
13102 getpkt (&rs
->buf
, 0);
13107 remote_target::trace_start ()
13109 struct remote_state
*rs
= get_remote_state ();
13111 putpkt ("QTStart");
13112 remote_get_noisy_reply ();
13113 if (rs
->buf
[0] == '\0')
13114 error (_("Target does not support this command."));
13115 if (strcmp (rs
->buf
.data (), "OK") != 0)
13116 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13120 remote_target::get_trace_status (struct trace_status
*ts
)
13122 /* Initialize it just to avoid a GCC false warning. */
13124 /* FIXME we need to get register block size some other way. */
13125 extern int trace_regblock_size
;
13126 enum packet_result result
;
13127 struct remote_state
*rs
= get_remote_state ();
13129 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13132 trace_regblock_size
13133 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13135 putpkt ("qTStatus");
13139 p
= remote_get_noisy_reply ();
13141 catch (const gdb_exception_error
&ex
)
13143 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13145 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13151 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13153 /* If the remote target doesn't do tracing, flag it. */
13154 if (result
== PACKET_UNKNOWN
)
13157 /* We're working with a live target. */
13158 ts
->filename
= NULL
;
13161 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13163 /* Function 'parse_trace_status' sets default value of each field of
13164 'ts' at first, so we don't have to do it here. */
13165 parse_trace_status (p
, ts
);
13167 return ts
->running
;
13171 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13172 struct uploaded_tp
*utp
)
13174 struct remote_state
*rs
= get_remote_state ();
13176 struct bp_location
*loc
;
13177 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13178 size_t size
= get_remote_packet_size ();
13183 tp
->traceframe_usage
= 0;
13184 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
13186 /* If the tracepoint was never downloaded, don't go asking for
13188 if (tp
->number_on_target
== 0)
13190 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13191 phex_nz (loc
->address
, 0));
13193 reply
= remote_get_noisy_reply ();
13194 if (reply
&& *reply
)
13197 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13203 utp
->hit_count
= 0;
13204 utp
->traceframe_usage
= 0;
13205 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13206 phex_nz (utp
->addr
, 0));
13208 reply
= remote_get_noisy_reply ();
13209 if (reply
&& *reply
)
13212 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13218 remote_target::trace_stop ()
13220 struct remote_state
*rs
= get_remote_state ();
13223 remote_get_noisy_reply ();
13224 if (rs
->buf
[0] == '\0')
13225 error (_("Target does not support this command."));
13226 if (strcmp (rs
->buf
.data (), "OK") != 0)
13227 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13231 remote_target::trace_find (enum trace_find_type type
, int num
,
13232 CORE_ADDR addr1
, CORE_ADDR addr2
,
13235 struct remote_state
*rs
= get_remote_state ();
13236 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13238 int target_frameno
= -1, target_tracept
= -1;
13240 /* Lookups other than by absolute frame number depend on the current
13241 trace selected, so make sure it is correct on the remote end
13243 if (type
!= tfind_number
)
13244 set_remote_traceframe ();
13246 p
= rs
->buf
.data ();
13247 strcpy (p
, "QTFrame:");
13248 p
= strchr (p
, '\0');
13252 xsnprintf (p
, endbuf
- p
, "%x", num
);
13255 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13258 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13261 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13262 phex_nz (addr2
, 0));
13264 case tfind_outside
:
13265 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13266 phex_nz (addr2
, 0));
13269 error (_("Unknown trace find type %d"), type
);
13273 reply
= remote_get_noisy_reply ();
13274 if (*reply
== '\0')
13275 error (_("Target does not support this command."));
13277 while (reply
&& *reply
)
13282 target_frameno
= (int) strtol (p
, &reply
, 16);
13284 error (_("Unable to parse trace frame number"));
13285 /* Don't update our remote traceframe number cache on failure
13286 to select a remote traceframe. */
13287 if (target_frameno
== -1)
13292 target_tracept
= (int) strtol (p
, &reply
, 16);
13294 error (_("Unable to parse tracepoint number"));
13296 case 'O': /* "OK"? */
13297 if (reply
[1] == 'K' && reply
[2] == '\0')
13300 error (_("Bogus reply from target: %s"), reply
);
13303 error (_("Bogus reply from target: %s"), reply
);
13306 *tpp
= target_tracept
;
13308 rs
->remote_traceframe_number
= target_frameno
;
13309 return target_frameno
;
13313 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13315 struct remote_state
*rs
= get_remote_state ();
13319 set_remote_traceframe ();
13321 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13323 reply
= remote_get_noisy_reply ();
13324 if (reply
&& *reply
)
13328 unpack_varlen_hex (reply
+ 1, &uval
);
13329 *val
= (LONGEST
) uval
;
13337 remote_target::save_trace_data (const char *filename
)
13339 struct remote_state
*rs
= get_remote_state ();
13342 p
= rs
->buf
.data ();
13343 strcpy (p
, "QTSave:");
13345 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13346 >= get_remote_packet_size ())
13347 error (_("Remote file name too long for trace save packet"));
13348 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13351 reply
= remote_get_noisy_reply ();
13352 if (*reply
== '\0')
13353 error (_("Target does not support this command."));
13354 if (strcmp (reply
, "OK") != 0)
13355 error (_("Bogus reply from target: %s"), reply
);
13359 /* This is basically a memory transfer, but needs to be its own packet
13360 because we don't know how the target actually organizes its trace
13361 memory, plus we want to be able to ask for as much as possible, but
13362 not be unhappy if we don't get as much as we ask for. */
13365 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13367 struct remote_state
*rs
= get_remote_state ();
13372 p
= rs
->buf
.data ();
13373 strcpy (p
, "qTBuffer:");
13375 p
+= hexnumstr (p
, offset
);
13377 p
+= hexnumstr (p
, len
);
13381 reply
= remote_get_noisy_reply ();
13382 if (reply
&& *reply
)
13384 /* 'l' by itself means we're at the end of the buffer and
13385 there is nothing more to get. */
13389 /* Convert the reply into binary. Limit the number of bytes to
13390 convert according to our passed-in buffer size, rather than
13391 what was returned in the packet; if the target is
13392 unexpectedly generous and gives us a bigger reply than we
13393 asked for, we don't want to crash. */
13394 rslt
= hex2bin (reply
, buf
, len
);
13398 /* Something went wrong, flag as an error. */
13403 remote_target::set_disconnected_tracing (int val
)
13405 struct remote_state
*rs
= get_remote_state ();
13407 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13411 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13412 "QTDisconnected:%x", val
);
13414 reply
= remote_get_noisy_reply ();
13415 if (*reply
== '\0')
13416 error (_("Target does not support this command."));
13417 if (strcmp (reply
, "OK") != 0)
13418 error (_("Bogus reply from target: %s"), reply
);
13421 warning (_("Target does not support disconnected tracing."));
13425 remote_target::core_of_thread (ptid_t ptid
)
13427 struct thread_info
*info
= find_thread_ptid (ptid
);
13429 if (info
!= NULL
&& info
->priv
!= NULL
)
13430 return get_remote_thread_info (info
)->core
;
13436 remote_target::set_circular_trace_buffer (int val
)
13438 struct remote_state
*rs
= get_remote_state ();
13441 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13442 "QTBuffer:circular:%x", val
);
13444 reply
= remote_get_noisy_reply ();
13445 if (*reply
== '\0')
13446 error (_("Target does not support this command."));
13447 if (strcmp (reply
, "OK") != 0)
13448 error (_("Bogus reply from target: %s"), reply
);
13452 remote_target::traceframe_info ()
13454 gdb::optional
<gdb::char_vector
> text
13455 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO
,
13458 return parse_traceframe_info (text
->data ());
13463 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13464 instruction on which a fast tracepoint may be placed. Returns -1
13465 if the packet is not supported, and 0 if the minimum instruction
13466 length is unknown. */
13469 remote_target::get_min_fast_tracepoint_insn_len ()
13471 struct remote_state
*rs
= get_remote_state ();
13474 /* If we're not debugging a process yet, the IPA can't be
13476 if (!target_has_execution
)
13479 /* Make sure the remote is pointing at the right process. */
13480 set_general_process ();
13482 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13484 reply
= remote_get_noisy_reply ();
13485 if (*reply
== '\0')
13489 ULONGEST min_insn_len
;
13491 unpack_varlen_hex (reply
, &min_insn_len
);
13493 return (int) min_insn_len
;
13498 remote_target::set_trace_buffer_size (LONGEST val
)
13500 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13502 struct remote_state
*rs
= get_remote_state ();
13503 char *buf
= rs
->buf
.data ();
13504 char *endbuf
= buf
+ get_remote_packet_size ();
13505 enum packet_result result
;
13507 gdb_assert (val
>= 0 || val
== -1);
13508 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13509 /* Send -1 as literal "-1" to avoid host size dependency. */
13513 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13516 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13519 remote_get_noisy_reply ();
13520 result
= packet_ok (rs
->buf
,
13521 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13523 if (result
!= PACKET_OK
)
13524 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13529 remote_target::set_trace_notes (const char *user
, const char *notes
,
13530 const char *stop_notes
)
13532 struct remote_state
*rs
= get_remote_state ();
13534 char *buf
= rs
->buf
.data ();
13535 char *endbuf
= buf
+ get_remote_packet_size ();
13538 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13541 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13542 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13548 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13549 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13555 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13556 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13560 /* Ensure the buffer is terminated. */
13564 reply
= remote_get_noisy_reply ();
13565 if (*reply
== '\0')
13568 if (strcmp (reply
, "OK") != 0)
13569 error (_("Bogus reply from target: %s"), reply
);
13575 remote_target::use_agent (bool use
)
13577 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13579 struct remote_state
*rs
= get_remote_state ();
13581 /* If the stub supports QAgent. */
13582 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13584 getpkt (&rs
->buf
, 0);
13586 if (strcmp (rs
->buf
.data (), "OK") == 0)
13597 remote_target::can_use_agent ()
13599 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13602 struct btrace_target_info
13604 /* The ptid of the traced thread. */
13607 /* The obtained branch trace configuration. */
13608 struct btrace_config conf
;
13611 /* Reset our idea of our target's btrace configuration. */
13614 remote_btrace_reset (remote_state
*rs
)
13616 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13619 /* Synchronize the configuration with the target. */
13622 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13624 struct packet_config
*packet
;
13625 struct remote_state
*rs
;
13626 char *buf
, *pos
, *endbuf
;
13628 rs
= get_remote_state ();
13629 buf
= rs
->buf
.data ();
13630 endbuf
= buf
+ get_remote_packet_size ();
13632 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13633 if (packet_config_support (packet
) == PACKET_ENABLE
13634 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13637 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13641 getpkt (&rs
->buf
, 0);
13643 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13645 if (buf
[0] == 'E' && buf
[1] == '.')
13646 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13648 error (_("Failed to configure the BTS buffer size."));
13651 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13654 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13655 if (packet_config_support (packet
) == PACKET_ENABLE
13656 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13659 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13663 getpkt (&rs
->buf
, 0);
13665 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13667 if (buf
[0] == 'E' && buf
[1] == '.')
13668 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13670 error (_("Failed to configure the trace buffer size."));
13673 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13677 /* Read the current thread's btrace configuration from the target and
13678 store it into CONF. */
13681 btrace_read_config (struct btrace_config
*conf
)
13683 gdb::optional
<gdb::char_vector
> xml
13684 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF
, "");
13686 parse_xml_btrace_conf (conf
, xml
->data ());
13689 /* Maybe reopen target btrace. */
13692 remote_target::remote_btrace_maybe_reopen ()
13694 struct remote_state
*rs
= get_remote_state ();
13695 int btrace_target_pushed
= 0;
13696 #if !defined (HAVE_LIBIPT)
13700 /* Don't bother walking the entirety of the remote thread list when
13701 we know the feature isn't supported by the remote. */
13702 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
13705 scoped_restore_current_thread restore_thread
;
13707 for (thread_info
*tp
: all_non_exited_threads ())
13709 set_general_thread (tp
->ptid
);
13711 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13712 btrace_read_config (&rs
->btrace_config
);
13714 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13717 #if !defined (HAVE_LIBIPT)
13718 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13723 warning (_("Target is recording using Intel Processor Trace "
13724 "but support was disabled at compile time."));
13729 #endif /* !defined (HAVE_LIBIPT) */
13731 /* Push target, once, but before anything else happens. This way our
13732 changes to the threads will be cleaned up by unpushing the target
13733 in case btrace_read_config () throws. */
13734 if (!btrace_target_pushed
)
13736 btrace_target_pushed
= 1;
13737 record_btrace_push_target ();
13738 printf_filtered (_("Target is recording using %s.\n"),
13739 btrace_format_string (rs
->btrace_config
.format
));
13742 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13743 tp
->btrace
.target
->ptid
= tp
->ptid
;
13744 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13748 /* Enable branch tracing. */
13750 struct btrace_target_info
*
13751 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
13753 struct btrace_target_info
*tinfo
= NULL
;
13754 struct packet_config
*packet
= NULL
;
13755 struct remote_state
*rs
= get_remote_state ();
13756 char *buf
= rs
->buf
.data ();
13757 char *endbuf
= buf
+ get_remote_packet_size ();
13759 switch (conf
->format
)
13761 case BTRACE_FORMAT_BTS
:
13762 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13765 case BTRACE_FORMAT_PT
:
13766 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13770 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13771 error (_("Target does not support branch tracing."));
13773 btrace_sync_conf (conf
);
13775 set_general_thread (ptid
);
13777 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13779 getpkt (&rs
->buf
, 0);
13781 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13783 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13784 error (_("Could not enable branch tracing for %s: %s"),
13785 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
13787 error (_("Could not enable branch tracing for %s."),
13788 target_pid_to_str (ptid
).c_str ());
13791 tinfo
= XCNEW (struct btrace_target_info
);
13792 tinfo
->ptid
= ptid
;
13794 /* If we fail to read the configuration, we lose some information, but the
13795 tracing itself is not impacted. */
13798 btrace_read_config (&tinfo
->conf
);
13800 catch (const gdb_exception_error
&err
)
13802 if (err
.message
!= NULL
)
13803 warning ("%s", err
.what ());
13809 /* Disable branch tracing. */
13812 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
13814 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13815 struct remote_state
*rs
= get_remote_state ();
13816 char *buf
= rs
->buf
.data ();
13817 char *endbuf
= buf
+ get_remote_packet_size ();
13819 if (packet_config_support (packet
) != PACKET_ENABLE
)
13820 error (_("Target does not support branch tracing."));
13822 set_general_thread (tinfo
->ptid
);
13824 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13826 getpkt (&rs
->buf
, 0);
13828 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13830 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13831 error (_("Could not disable branch tracing for %s: %s"),
13832 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
13834 error (_("Could not disable branch tracing for %s."),
13835 target_pid_to_str (tinfo
->ptid
).c_str ());
13841 /* Teardown branch tracing. */
13844 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
13846 /* We must not talk to the target during teardown. */
13850 /* Read the branch trace. */
13853 remote_target::read_btrace (struct btrace_data
*btrace
,
13854 struct btrace_target_info
*tinfo
,
13855 enum btrace_read_type type
)
13857 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13860 if (packet_config_support (packet
) != PACKET_ENABLE
)
13861 error (_("Target does not support branch tracing."));
13863 #if !defined(HAVE_LIBEXPAT)
13864 error (_("Cannot process branch tracing result. XML parsing not supported."));
13869 case BTRACE_READ_ALL
:
13872 case BTRACE_READ_NEW
:
13875 case BTRACE_READ_DELTA
:
13879 internal_error (__FILE__
, __LINE__
,
13880 _("Bad branch tracing read type: %u."),
13881 (unsigned int) type
);
13884 gdb::optional
<gdb::char_vector
> xml
13885 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE
, annex
);
13887 return BTRACE_ERR_UNKNOWN
;
13889 parse_xml_btrace (btrace
, xml
->data ());
13891 return BTRACE_ERR_NONE
;
13894 const struct btrace_config
*
13895 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
13897 return &tinfo
->conf
;
13901 remote_target::augmented_libraries_svr4_read ()
13903 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13907 /* Implementation of to_load. */
13910 remote_target::load (const char *name
, int from_tty
)
13912 generic_load (name
, from_tty
);
13915 /* Accepts an integer PID; returns a string representing a file that
13916 can be opened on the remote side to get the symbols for the child
13917 process. Returns NULL if the operation is not supported. */
13920 remote_target::pid_to_exec_file (int pid
)
13922 static gdb::optional
<gdb::char_vector
> filename
;
13923 struct inferior
*inf
;
13924 char *annex
= NULL
;
13926 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13929 inf
= find_inferior_pid (pid
);
13931 internal_error (__FILE__
, __LINE__
,
13932 _("not currently attached to process %d"), pid
);
13934 if (!inf
->fake_pid_p
)
13936 const int annex_size
= 9;
13938 annex
= (char *) alloca (annex_size
);
13939 xsnprintf (annex
, annex_size
, "%x", pid
);
13942 filename
= target_read_stralloc (current_top_target (),
13943 TARGET_OBJECT_EXEC_FILE
, annex
);
13945 return filename
? filename
->data () : nullptr;
13948 /* Implement the to_can_do_single_step target_ops method. */
13951 remote_target::can_do_single_step ()
13953 /* We can only tell whether target supports single step or not by
13954 supported s and S vCont actions if the stub supports vContSupported
13955 feature. If the stub doesn't support vContSupported feature,
13956 we have conservatively to think target doesn't supports single
13958 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13960 struct remote_state
*rs
= get_remote_state ();
13962 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13963 remote_vcont_probe ();
13965 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13971 /* Implementation of the to_execution_direction method for the remote
13974 enum exec_direction_kind
13975 remote_target::execution_direction ()
13977 struct remote_state
*rs
= get_remote_state ();
13979 return rs
->last_resume_exec_dir
;
13982 /* Return pointer to the thread_info struct which corresponds to
13983 THREAD_HANDLE (having length HANDLE_LEN). */
13986 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
13990 for (thread_info
*tp
: all_non_exited_threads ())
13992 remote_thread_info
*priv
= get_remote_thread_info (tp
);
13994 if (tp
->inf
== inf
&& priv
!= NULL
)
13996 if (handle_len
!= priv
->thread_handle
.size ())
13997 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
13998 handle_len
, priv
->thread_handle
.size ());
13999 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14009 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14011 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14012 return priv
->thread_handle
;
14016 remote_target::can_async_p ()
14018 struct remote_state
*rs
= get_remote_state ();
14020 /* We don't go async if the user has explicitly prevented it with the
14021 "maint set target-async" command. */
14022 if (!target_async_permitted
)
14025 /* We're async whenever the serial device is. */
14026 return serial_can_async_p (rs
->remote_desc
);
14030 remote_target::is_async_p ()
14032 struct remote_state
*rs
= get_remote_state ();
14034 if (!target_async_permitted
)
14035 /* We only enable async when the user specifically asks for it. */
14038 /* We're async whenever the serial device is. */
14039 return serial_is_async_p (rs
->remote_desc
);
14042 /* Pass the SERIAL event on and up to the client. One day this code
14043 will be able to delay notifying the client of an event until the
14044 point where an entire packet has been received. */
14046 static serial_event_ftype remote_async_serial_handler
;
14049 remote_async_serial_handler (struct serial
*scb
, void *context
)
14051 /* Don't propogate error information up to the client. Instead let
14052 the client find out about the error by querying the target. */
14053 inferior_event_handler (INF_REG_EVENT
, NULL
);
14057 remote_async_inferior_event_handler (gdb_client_data data
)
14059 inferior_event_handler (INF_REG_EVENT
, data
);
14063 remote_target::async (int enable
)
14065 struct remote_state
*rs
= get_remote_state ();
14069 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14071 /* If there are pending events in the stop reply queue tell the
14072 event loop to process them. */
14073 if (!rs
->stop_reply_queue
.empty ())
14074 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14075 /* For simplicity, below we clear the pending events token
14076 without remembering whether it is marked, so here we always
14077 mark it. If there's actually no pending notification to
14078 process, this ends up being a no-op (other than a spurious
14079 event-loop wakeup). */
14080 if (target_is_non_stop_p ())
14081 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14085 serial_async (rs
->remote_desc
, NULL
, NULL
);
14086 /* If the core is disabling async, it doesn't want to be
14087 disturbed with target events. Clear all async event sources
14089 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14090 if (target_is_non_stop_p ())
14091 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14095 /* Implementation of the to_thread_events method. */
14098 remote_target::thread_events (int enable
)
14100 struct remote_state
*rs
= get_remote_state ();
14101 size_t size
= get_remote_packet_size ();
14103 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14106 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14108 getpkt (&rs
->buf
, 0);
14110 switch (packet_ok (rs
->buf
,
14111 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14114 if (strcmp (rs
->buf
.data (), "OK") != 0)
14115 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14118 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14120 case PACKET_UNKNOWN
:
14126 set_remote_cmd (const char *args
, int from_tty
)
14128 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
14132 show_remote_cmd (const char *args
, int from_tty
)
14134 /* We can't just use cmd_show_list here, because we want to skip
14135 the redundant "show remote Z-packet" and the legacy aliases. */
14136 struct cmd_list_element
*list
= remote_show_cmdlist
;
14137 struct ui_out
*uiout
= current_uiout
;
14139 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14140 for (; list
!= NULL
; list
= list
->next
)
14141 if (strcmp (list
->name
, "Z-packet") == 0)
14143 else if (list
->type
== not_set_cmd
)
14144 /* Alias commands are exactly like the original, except they
14145 don't have the normal type. */
14149 ui_out_emit_tuple
option_emitter (uiout
, "option");
14151 uiout
->field_string ("name", list
->name
);
14152 uiout
->text (": ");
14153 if (list
->type
== show_cmd
)
14154 do_show_command (NULL
, from_tty
, list
);
14156 cmd_func (list
, NULL
, from_tty
);
14161 /* Function to be called whenever a new objfile (shlib) is detected. */
14163 remote_new_objfile (struct objfile
*objfile
)
14165 remote_target
*remote
= get_current_remote_target ();
14167 if (remote
!= NULL
) /* Have a remote connection. */
14168 remote
->remote_check_symbols ();
14171 /* Pull all the tracepoints defined on the target and create local
14172 data structures representing them. We don't want to create real
14173 tracepoints yet, we don't want to mess up the user's existing
14177 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14179 struct remote_state
*rs
= get_remote_state ();
14182 /* Ask for a first packet of tracepoint definition. */
14184 getpkt (&rs
->buf
, 0);
14185 p
= rs
->buf
.data ();
14186 while (*p
&& *p
!= 'l')
14188 parse_tracepoint_definition (p
, utpp
);
14189 /* Ask for another packet of tracepoint definition. */
14191 getpkt (&rs
->buf
, 0);
14192 p
= rs
->buf
.data ();
14198 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14200 struct remote_state
*rs
= get_remote_state ();
14203 /* Ask for a first packet of variable definition. */
14205 getpkt (&rs
->buf
, 0);
14206 p
= rs
->buf
.data ();
14207 while (*p
&& *p
!= 'l')
14209 parse_tsv_definition (p
, utsvp
);
14210 /* Ask for another packet of variable definition. */
14212 getpkt (&rs
->buf
, 0);
14213 p
= rs
->buf
.data ();
14218 /* The "set/show range-stepping" show hook. */
14221 show_range_stepping (struct ui_file
*file
, int from_tty
,
14222 struct cmd_list_element
*c
,
14225 fprintf_filtered (file
,
14226 _("Debugger's willingness to use range stepping "
14227 "is %s.\n"), value
);
14230 /* Return true if the vCont;r action is supported by the remote
14234 remote_target::vcont_r_supported ()
14236 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14237 remote_vcont_probe ();
14239 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14240 && get_remote_state ()->supports_vCont
.r
);
14243 /* The "set/show range-stepping" set hook. */
14246 set_range_stepping (const char *ignore_args
, int from_tty
,
14247 struct cmd_list_element
*c
)
14249 /* When enabling, check whether range stepping is actually supported
14250 by the target, and warn if not. */
14251 if (use_range_stepping
)
14253 remote_target
*remote
= get_current_remote_target ();
14255 || !remote
->vcont_r_supported ())
14256 warning (_("Range stepping is not supported by the current target"));
14261 _initialize_remote (void)
14263 struct cmd_list_element
*cmd
;
14264 const char *cmd_name
;
14266 /* architecture specific data */
14267 remote_g_packet_data_handle
=
14268 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14270 add_target (remote_target_info
, remote_target::open
);
14271 add_target (extended_remote_target_info
, extended_remote_target::open
);
14273 /* Hook into new objfile notification. */
14274 gdb::observers::new_objfile
.attach (remote_new_objfile
);
14277 init_remote_threadtests ();
14280 /* set/show remote ... */
14282 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
14283 Remote protocol specific variables.\n\
14284 Configure various remote-protocol specific variables such as\n\
14285 the packets being used."),
14286 &remote_set_cmdlist
, "set remote ",
14287 0 /* allow-unknown */, &setlist
);
14288 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14289 Remote protocol specific variables.\n\
14290 Configure various remote-protocol specific variables such as\n\
14291 the packets being used."),
14292 &remote_show_cmdlist
, "show remote ",
14293 0 /* allow-unknown */, &showlist
);
14295 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14296 Compare section data on target to the exec file.\n\
14297 Argument is a single section name (default: all loaded sections).\n\
14298 To compare only read-only loaded sections, specify the -r option."),
14301 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14302 Send an arbitrary packet to a remote target.\n\
14303 maintenance packet TEXT\n\
14304 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14305 this command sends the string TEXT to the inferior, and displays the\n\
14306 response packet. GDB supplies the initial `$' character, and the\n\
14307 terminating `#' character and checksum."),
14310 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14311 Set whether to send break if interrupted."), _("\
14312 Show whether to send break if interrupted."), _("\
14313 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14314 set_remotebreak
, show_remotebreak
,
14315 &setlist
, &showlist
);
14316 cmd_name
= "remotebreak";
14317 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
14318 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14319 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14320 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
14321 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14323 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14324 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14326 Set interrupt sequence to remote target."), _("\
14327 Show interrupt sequence to remote target."), _("\
14328 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14329 NULL
, show_interrupt_sequence
,
14330 &remote_set_cmdlist
,
14331 &remote_show_cmdlist
);
14333 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14334 &interrupt_on_connect
, _("\
14335 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14336 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14337 If set, interrupt sequence is sent to remote target."),
14339 &remote_set_cmdlist
, &remote_show_cmdlist
);
14341 /* Install commands for configuring memory read/write packets. */
14343 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14344 Set the maximum number of bytes per memory write packet (deprecated)."),
14346 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14347 Show the maximum number of bytes per memory write packet (deprecated)."),
14349 add_cmd ("memory-write-packet-size", no_class
,
14350 set_memory_write_packet_size
, _("\
14351 Set the maximum number of bytes per memory-write packet.\n\
14352 Specify the number of bytes in a packet or 0 (zero) for the\n\
14353 default packet size. The actual limit is further reduced\n\
14354 dependent on the target. Specify ``fixed'' to disable the\n\
14355 further restriction and ``limit'' to enable that restriction."),
14356 &remote_set_cmdlist
);
14357 add_cmd ("memory-read-packet-size", no_class
,
14358 set_memory_read_packet_size
, _("\
14359 Set the maximum number of bytes per memory-read packet.\n\
14360 Specify the number of bytes in a packet or 0 (zero) for the\n\
14361 default packet size. The actual limit is further reduced\n\
14362 dependent on the target. Specify ``fixed'' to disable the\n\
14363 further restriction and ``limit'' to enable that restriction."),
14364 &remote_set_cmdlist
);
14365 add_cmd ("memory-write-packet-size", no_class
,
14366 show_memory_write_packet_size
,
14367 _("Show the maximum number of bytes per memory-write packet."),
14368 &remote_show_cmdlist
);
14369 add_cmd ("memory-read-packet-size", no_class
,
14370 show_memory_read_packet_size
,
14371 _("Show the maximum number of bytes per memory-read packet."),
14372 &remote_show_cmdlist
);
14374 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14375 &remote_hw_watchpoint_limit
, _("\
14376 Set the maximum number of target hardware watchpoints."), _("\
14377 Show the maximum number of target hardware watchpoints."), _("\
14378 Specify \"unlimited\" for unlimited hardware watchpoints."),
14379 NULL
, show_hardware_watchpoint_limit
,
14380 &remote_set_cmdlist
,
14381 &remote_show_cmdlist
);
14382 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14384 &remote_hw_watchpoint_length_limit
, _("\
14385 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14386 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14387 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14388 NULL
, show_hardware_watchpoint_length_limit
,
14389 &remote_set_cmdlist
, &remote_show_cmdlist
);
14390 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14391 &remote_hw_breakpoint_limit
, _("\
14392 Set the maximum number of target hardware breakpoints."), _("\
14393 Show the maximum number of target hardware breakpoints."), _("\
14394 Specify \"unlimited\" for unlimited hardware breakpoints."),
14395 NULL
, show_hardware_breakpoint_limit
,
14396 &remote_set_cmdlist
, &remote_show_cmdlist
);
14398 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14399 &remote_address_size
, _("\
14400 Set the maximum size of the address (in bits) in a memory packet."), _("\
14401 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14403 NULL
, /* FIXME: i18n: */
14404 &setlist
, &showlist
);
14406 init_all_packet_configs ();
14408 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14409 "X", "binary-download", 1);
14411 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14412 "vCont", "verbose-resume", 0);
14414 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14415 "QPassSignals", "pass-signals", 0);
14417 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14418 "QCatchSyscalls", "catch-syscalls", 0);
14420 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14421 "QProgramSignals", "program-signals", 0);
14423 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14424 "QSetWorkingDir", "set-working-dir", 0);
14426 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14427 "QStartupWithShell", "startup-with-shell", 0);
14429 add_packet_config_cmd (&remote_protocol_packets
14430 [PACKET_QEnvironmentHexEncoded
],
14431 "QEnvironmentHexEncoded", "environment-hex-encoded",
14434 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14435 "QEnvironmentReset", "environment-reset",
14438 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14439 "QEnvironmentUnset", "environment-unset",
14442 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14443 "qSymbol", "symbol-lookup", 0);
14445 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14446 "P", "set-register", 1);
14448 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14449 "p", "fetch-register", 1);
14451 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14452 "Z0", "software-breakpoint", 0);
14454 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14455 "Z1", "hardware-breakpoint", 0);
14457 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14458 "Z2", "write-watchpoint", 0);
14460 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14461 "Z3", "read-watchpoint", 0);
14463 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14464 "Z4", "access-watchpoint", 0);
14466 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14467 "qXfer:auxv:read", "read-aux-vector", 0);
14469 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14470 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14472 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14473 "qXfer:features:read", "target-features", 0);
14475 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14476 "qXfer:libraries:read", "library-info", 0);
14478 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14479 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14481 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14482 "qXfer:memory-map:read", "memory-map", 0);
14484 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14485 "qXfer:spu:read", "read-spu-object", 0);
14487 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14488 "qXfer:spu:write", "write-spu-object", 0);
14490 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14491 "qXfer:osdata:read", "osdata", 0);
14493 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14494 "qXfer:threads:read", "threads", 0);
14496 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14497 "qXfer:siginfo:read", "read-siginfo-object", 0);
14499 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14500 "qXfer:siginfo:write", "write-siginfo-object", 0);
14502 add_packet_config_cmd
14503 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14504 "qXfer:traceframe-info:read", "traceframe-info", 0);
14506 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14507 "qXfer:uib:read", "unwind-info-block", 0);
14509 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14510 "qGetTLSAddr", "get-thread-local-storage-address",
14513 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14514 "qGetTIBAddr", "get-thread-information-block-address",
14517 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14518 "bc", "reverse-continue", 0);
14520 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14521 "bs", "reverse-step", 0);
14523 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14524 "qSupported", "supported-packets", 0);
14526 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14527 "qSearch:memory", "search-memory", 0);
14529 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14530 "qTStatus", "trace-status", 0);
14532 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14533 "vFile:setfs", "hostio-setfs", 0);
14535 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14536 "vFile:open", "hostio-open", 0);
14538 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14539 "vFile:pread", "hostio-pread", 0);
14541 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14542 "vFile:pwrite", "hostio-pwrite", 0);
14544 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14545 "vFile:close", "hostio-close", 0);
14547 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14548 "vFile:unlink", "hostio-unlink", 0);
14550 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14551 "vFile:readlink", "hostio-readlink", 0);
14553 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14554 "vFile:fstat", "hostio-fstat", 0);
14556 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14557 "vAttach", "attach", 0);
14559 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14562 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14563 "QStartNoAckMode", "noack", 0);
14565 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14566 "vKill", "kill", 0);
14568 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14569 "qAttached", "query-attached", 0);
14571 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14572 "ConditionalTracepoints",
14573 "conditional-tracepoints", 0);
14575 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14576 "ConditionalBreakpoints",
14577 "conditional-breakpoints", 0);
14579 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14580 "BreakpointCommands",
14581 "breakpoint-commands", 0);
14583 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14584 "FastTracepoints", "fast-tracepoints", 0);
14586 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14587 "TracepointSource", "TracepointSource", 0);
14589 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14590 "QAllow", "allow", 0);
14592 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14593 "StaticTracepoints", "static-tracepoints", 0);
14595 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14596 "InstallInTrace", "install-in-trace", 0);
14598 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14599 "qXfer:statictrace:read", "read-sdata-object", 0);
14601 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14602 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14604 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14605 "QDisableRandomization", "disable-randomization", 0);
14607 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14608 "QAgent", "agent", 0);
14610 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14611 "QTBuffer:size", "trace-buffer-size", 0);
14613 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14614 "Qbtrace:off", "disable-btrace", 0);
14616 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14617 "Qbtrace:bts", "enable-btrace-bts", 0);
14619 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14620 "Qbtrace:pt", "enable-btrace-pt", 0);
14622 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14623 "qXfer:btrace", "read-btrace", 0);
14625 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14626 "qXfer:btrace-conf", "read-btrace-conf", 0);
14628 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14629 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14631 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14632 "multiprocess-feature", "multiprocess-feature", 0);
14634 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14635 "swbreak-feature", "swbreak-feature", 0);
14637 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14638 "hwbreak-feature", "hwbreak-feature", 0);
14640 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14641 "fork-event-feature", "fork-event-feature", 0);
14643 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14644 "vfork-event-feature", "vfork-event-feature", 0);
14646 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14647 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14649 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14650 "vContSupported", "verbose-resume-supported", 0);
14652 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14653 "exec-event-feature", "exec-event-feature", 0);
14655 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14656 "vCtrlC", "ctrl-c", 0);
14658 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14659 "QThreadEvents", "thread-events", 0);
14661 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14662 "N stop reply", "no-resumed-stop-reply", 0);
14664 /* Assert that we've registered "set remote foo-packet" commands
14665 for all packet configs. */
14669 for (i
= 0; i
< PACKET_MAX
; i
++)
14671 /* Ideally all configs would have a command associated. Some
14672 still don't though. */
14677 case PACKET_QNonStop
:
14678 case PACKET_EnableDisableTracepoints_feature
:
14679 case PACKET_tracenz_feature
:
14680 case PACKET_DisconnectedTracing_feature
:
14681 case PACKET_augmented_libraries_svr4_read_feature
:
14683 /* Additions to this list need to be well justified:
14684 pre-existing packets are OK; new packets are not. */
14692 /* This catches both forgetting to add a config command, and
14693 forgetting to remove a packet from the exception list. */
14694 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14698 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14699 Z sub-packet has its own set and show commands, but users may
14700 have sets to this variable in their .gdbinit files (or in their
14702 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14703 &remote_Z_packet_detect
, _("\
14704 Set use of remote protocol `Z' packets."), _("\
14705 Show use of remote protocol `Z' packets."), _("\
14706 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14708 set_remote_protocol_Z_packet_cmd
,
14709 show_remote_protocol_Z_packet_cmd
,
14710 /* FIXME: i18n: Use of remote protocol
14711 `Z' packets is %s. */
14712 &remote_set_cmdlist
, &remote_show_cmdlist
);
14714 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14715 Manipulate files on the remote system.\n\
14716 Transfer files to and from the remote target system."),
14717 &remote_cmdlist
, "remote ",
14718 0 /* allow-unknown */, &cmdlist
);
14720 add_cmd ("put", class_files
, remote_put_command
,
14721 _("Copy a local file to the remote system."),
14724 add_cmd ("get", class_files
, remote_get_command
,
14725 _("Copy a remote file to the local system."),
14728 add_cmd ("delete", class_files
, remote_delete_command
,
14729 _("Delete a remote file."),
14732 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14733 &remote_exec_file_var
, _("\
14734 Set the remote pathname for \"run\"."), _("\
14735 Show the remote pathname for \"run\"."), NULL
,
14736 set_remote_exec_file
,
14737 show_remote_exec_file
,
14738 &remote_set_cmdlist
,
14739 &remote_show_cmdlist
);
14741 add_setshow_boolean_cmd ("range-stepping", class_run
,
14742 &use_range_stepping
, _("\
14743 Enable or disable range stepping."), _("\
14744 Show whether target-assisted range stepping is enabled."), _("\
14745 If on, and the target supports it, when stepping a source line, GDB\n\
14746 tells the target to step the corresponding range of addresses itself instead\n\
14747 of issuing multiple single-steps. This speeds up source level\n\
14748 stepping. If off, GDB always issues single-steps, even if range\n\
14749 stepping is supported by the target. The default is on."),
14750 set_range_stepping
,
14751 show_range_stepping
,
14755 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
14756 Set watchdog timer."), _("\
14757 Show watchdog timer."), _("\
14758 When non-zero, this timeout is used instead of waiting forever for a target\n\
14759 to finish a low-level step or continue operation. If the specified amount\n\
14760 of time passes without a response from the target, an error occurs."),
14763 &setlist
, &showlist
);
14765 /* Eventually initialize fileio. See fileio.c */
14766 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);