1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2020 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
30 #include "process-stratum-target.h"
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
39 #include "observable.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "gdbsupport/filestuff.h"
46 #include "gdbsupport/rsp-low.h"
50 #include "gdbsupport/gdb_sys_time.h"
52 #include "gdbsupport/event-loop.h"
53 #include "event-top.h"
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"
79 #include <unordered_map>
80 #include "async-event.h"
82 /* The remote target. */
84 static const char remote_doc
[] = N_("\
85 Use a remote computer via a serial line, using a gdb-specific protocol.\n\
86 Specify the serial device it is connected to\n\
87 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
89 #define OPAQUETHREADBYTES 8
91 /* a 64 bit opaque identifier */
92 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
94 struct gdb_ext_thread_info
;
95 struct threads_listing_context
;
96 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
97 struct protocol_feature
;
101 typedef std::unique_ptr
<stop_reply
> stop_reply_up
;
103 /* Generic configuration support for packets the stub optionally
104 supports. Allows the user to specify the use of the packet as well
105 as allowing GDB to auto-detect support in the remote stub. */
109 PACKET_SUPPORT_UNKNOWN
= 0,
114 /* Analyze a packet's return value and update the packet config
124 struct threads_listing_context
;
126 /* Stub vCont actions support.
128 Each field is a boolean flag indicating whether the stub reports
129 support for the corresponding action. */
131 struct vCont_action_support
146 /* About this many threadids fit in a packet. */
148 #define MAXTHREADLISTRESULTS 32
150 /* Data for the vFile:pread readahead cache. */
152 struct readahead_cache
154 /* Invalidate the readahead cache. */
157 /* Invalidate the readahead cache if it is holding data for FD. */
158 void invalidate_fd (int fd
);
160 /* Serve pread from the readahead cache. Returns number of bytes
161 read, or 0 if the request can't be served from the cache. */
162 int pread (int fd
, gdb_byte
*read_buf
, size_t len
, ULONGEST offset
);
164 /* The file descriptor for the file that is being cached. -1 if the
168 /* The offset into the file that the cache buffer corresponds
172 /* The buffer holding the cache contents. */
173 gdb_byte
*buf
= nullptr;
174 /* The buffer's size. We try to read as much as fits into a packet
178 /* Cache hit and miss counters. */
179 ULONGEST hit_count
= 0;
180 ULONGEST miss_count
= 0;
183 /* Description of the remote protocol for a given architecture. */
187 long offset
; /* Offset into G packet. */
188 long regnum
; /* GDB's internal register number. */
189 LONGEST pnum
; /* Remote protocol register number. */
190 int in_g_packet
; /* Always part of G packet. */
191 /* long size in bytes; == register_size (target_gdbarch (), regnum);
193 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
197 struct remote_arch_state
199 explicit remote_arch_state (struct gdbarch
*gdbarch
);
201 /* Description of the remote protocol registers. */
202 long sizeof_g_packet
;
204 /* Description of the remote protocol registers indexed by REGNUM
205 (making an array gdbarch_num_regs in size). */
206 std::unique_ptr
<packet_reg
[]> regs
;
208 /* This is the size (in chars) of the first response to the ``g''
209 packet. It is used as a heuristic when determining the maximum
210 size of memory-read and memory-write packets. A target will
211 typically only reserve a buffer large enough to hold the ``g''
212 packet. The size does not include packet overhead (headers and
214 long actual_register_packet_size
;
216 /* This is the maximum size (in chars) of a non read/write packet.
217 It is also used as a cap on the size of read/write packets. */
218 long remote_packet_size
;
221 /* Description of the remote protocol state for the currently
222 connected target. This is per-target state, and independent of the
223 selected architecture. */
232 /* Get the remote arch state for GDBARCH. */
233 struct remote_arch_state
*get_remote_arch_state (struct gdbarch
*gdbarch
);
237 /* A buffer to use for incoming packets, and its current size. The
238 buffer is grown dynamically for larger incoming packets.
239 Outgoing packets may also be constructed in this buffer.
240 The size of the buffer is always at least REMOTE_PACKET_SIZE;
241 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
243 gdb::char_vector buf
;
245 /* True if we're going through initial connection setup (finding out
246 about the remote side's threads, relocating symbols, etc.). */
247 bool starting_up
= false;
249 /* If we negotiated packet size explicitly (and thus can bypass
250 heuristics for the largest packet size that will not overflow
251 a buffer in the stub), this will be set to that packet size.
252 Otherwise zero, meaning to use the guessed size. */
253 long explicit_packet_size
= 0;
255 /* remote_wait is normally called when the target is running and
256 waits for a stop reply packet. But sometimes we need to call it
257 when the target is already stopped. We can send a "?" packet
258 and have remote_wait read the response. Or, if we already have
259 the response, we can stash it in BUF and tell remote_wait to
260 skip calling getpkt. This flag is set when BUF contains a
261 stop reply packet and the target is not waiting. */
262 int cached_wait_status
= 0;
264 /* True, if in no ack mode. That is, neither GDB nor the stub will
265 expect acks from each other. The connection is assumed to be
267 bool noack_mode
= false;
269 /* True if we're connected in extended remote mode. */
270 bool extended
= false;
272 /* True if we resumed the target and we're waiting for the target to
273 stop. In the mean time, we can't start another command/query.
274 The remote server wouldn't be ready to process it, so we'd
275 timeout waiting for a reply that would never come and eventually
276 we'd close the connection. This can happen in asynchronous mode
277 because we allow GDB commands while the target is running. */
278 bool waiting_for_stop_reply
= false;
280 /* The status of the stub support for the various vCont actions. */
281 vCont_action_support supports_vCont
;
282 /* Whether vCont support was probed already. This is a workaround
283 until packet_support is per-connection. */
284 bool supports_vCont_probed
;
286 /* True if the user has pressed Ctrl-C, but the target hasn't
287 responded to that. */
288 bool ctrlc_pending_p
= false;
290 /* True if we saw a Ctrl-C while reading or writing from/to the
291 remote descriptor. At that point it is not safe to send a remote
292 interrupt packet, so we instead remember we saw the Ctrl-C and
293 process it once we're done with sending/receiving the current
294 packet, which should be shortly. If however that takes too long,
295 and the user presses Ctrl-C again, we offer to disconnect. */
296 bool got_ctrlc_during_io
= false;
298 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
299 remote_open knows that we don't have a file open when the program
301 struct serial
*remote_desc
= nullptr;
303 /* These are the threads which we last sent to the remote system. The
304 TID member will be -1 for all or -2 for not sent yet. */
305 ptid_t general_thread
= null_ptid
;
306 ptid_t continue_thread
= null_ptid
;
308 /* This is the traceframe which we last selected on the remote system.
309 It will be -1 if no traceframe is selected. */
310 int remote_traceframe_number
= -1;
312 char *last_pass_packet
= nullptr;
314 /* The last QProgramSignals packet sent to the target. We bypass
315 sending a new program signals list down to the target if the new
316 packet is exactly the same as the last we sent. IOW, we only let
317 the target know about program signals list changes. */
318 char *last_program_signals_packet
= nullptr;
320 gdb_signal last_sent_signal
= GDB_SIGNAL_0
;
322 bool last_sent_step
= false;
324 /* The execution direction of the last resume we got. */
325 exec_direction_kind last_resume_exec_dir
= EXEC_FORWARD
;
327 char *finished_object
= nullptr;
328 char *finished_annex
= nullptr;
329 ULONGEST finished_offset
= 0;
331 /* Should we try the 'ThreadInfo' query packet?
333 This variable (NOT available to the user: auto-detect only!)
334 determines whether GDB will use the new, simpler "ThreadInfo"
335 query or the older, more complex syntax for thread queries.
336 This is an auto-detect variable (set to true at each connect,
337 and set to false when the target fails to recognize it). */
338 bool use_threadinfo_query
= false;
339 bool use_threadextra_query
= false;
341 threadref echo_nextthread
{};
342 threadref nextthread
{};
343 threadref resultthreadlist
[MAXTHREADLISTRESULTS
] {};
345 /* The state of remote notification. */
346 struct remote_notif_state
*notif_state
= nullptr;
348 /* The branch trace configuration. */
349 struct btrace_config btrace_config
{};
351 /* The argument to the last "vFile:setfs:" packet we sent, used
352 to avoid sending repeated unnecessary "vFile:setfs:" packets.
353 Initialized to -1 to indicate that no "vFile:setfs:" packet
354 has yet been sent. */
357 /* A readahead cache for vFile:pread. Often, reading a binary
358 involves a sequence of small reads. E.g., when parsing an ELF
359 file. A readahead cache helps mostly the case of remote
360 debugging on a connection with higher latency, due to the
361 request/reply nature of the RSP. We only cache data for a single
362 file descriptor at a time. */
363 struct readahead_cache readahead_cache
;
365 /* The list of already fetched and acknowledged stop events. This
366 queue is used for notification Stop, and other notifications
367 don't need queue for their events, because the notification
368 events of Stop can't be consumed immediately, so that events
369 should be queued first, and be consumed by remote_wait_{ns,as}
370 one per time. Other notifications can consume their events
371 immediately, so queue is not needed for them. */
372 std::vector
<stop_reply_up
> stop_reply_queue
;
374 /* Asynchronous signal handle registered as event loop source for
375 when we have pending events ready to be passed to the core. */
376 struct async_event_handler
*remote_async_inferior_event_token
= nullptr;
378 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
379 ``forever'' still use the normal timeout mechanism. This is
380 currently used by the ASYNC code to guarentee that target reads
381 during the initial connect always time-out. Once getpkt has been
382 modified to return a timeout indication and, in turn
383 remote_wait()/wait_for_inferior() have gained a timeout parameter
385 int wait_forever_enabled_p
= 1;
388 /* Mapping of remote protocol data for each gdbarch. Usually there
389 is only one entry here, though we may see more with stubs that
390 support multi-process. */
391 std::unordered_map
<struct gdbarch
*, remote_arch_state
>
395 static const target_info remote_target_info
= {
397 N_("Remote serial target in gdb-specific protocol"),
401 class remote_target
: public process_stratum_target
404 remote_target () = default;
405 ~remote_target () override
;
407 const target_info
&info () const override
408 { return remote_target_info
; }
410 const char *connection_string () override
;
412 thread_control_capabilities
get_thread_control_capabilities () override
413 { return tc_schedlock
; }
415 /* Open a remote connection. */
416 static void open (const char *, int);
418 void close () override
;
420 void detach (inferior
*, int) override
;
421 void disconnect (const char *, int) override
;
423 void commit_resume () override
;
424 void resume (ptid_t
, int, enum gdb_signal
) override
;
425 ptid_t
wait (ptid_t
, struct target_waitstatus
*, target_wait_flags
) override
;
427 void fetch_registers (struct regcache
*, int) override
;
428 void store_registers (struct regcache
*, int) override
;
429 void prepare_to_store (struct regcache
*) override
;
431 void files_info () override
;
433 int insert_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
435 int remove_breakpoint (struct gdbarch
*, struct bp_target_info
*,
436 enum remove_bp_reason
) override
;
439 bool stopped_by_sw_breakpoint () override
;
440 bool supports_stopped_by_sw_breakpoint () override
;
442 bool stopped_by_hw_breakpoint () override
;
444 bool supports_stopped_by_hw_breakpoint () override
;
446 bool stopped_by_watchpoint () override
;
448 bool stopped_data_address (CORE_ADDR
*) override
;
450 bool watchpoint_addr_within_range (CORE_ADDR
, CORE_ADDR
, int) override
;
452 int can_use_hw_breakpoint (enum bptype
, int, int) override
;
454 int insert_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
456 int remove_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
458 int region_ok_for_hw_watchpoint (CORE_ADDR
, int) override
;
460 int insert_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
461 struct expression
*) override
;
463 int remove_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
464 struct expression
*) override
;
466 void kill () override
;
468 void load (const char *, int) override
;
470 void mourn_inferior () override
;
472 void pass_signals (gdb::array_view
<const unsigned char>) override
;
474 int set_syscall_catchpoint (int, bool, int,
475 gdb::array_view
<const int>) override
;
477 void program_signals (gdb::array_view
<const unsigned char>) override
;
479 bool thread_alive (ptid_t ptid
) override
;
481 const char *thread_name (struct thread_info
*) override
;
483 void update_thread_list () override
;
485 std::string
pid_to_str (ptid_t
) override
;
487 const char *extra_thread_info (struct thread_info
*) override
;
489 ptid_t
get_ada_task_ptid (long lwp
, long thread
) override
;
491 thread_info
*thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
493 inferior
*inf
) override
;
495 gdb::byte_vector
thread_info_to_thread_handle (struct thread_info
*tp
)
498 void stop (ptid_t
) override
;
500 void interrupt () override
;
502 void pass_ctrlc () override
;
504 enum target_xfer_status
xfer_partial (enum target_object object
,
507 const gdb_byte
*writebuf
,
508 ULONGEST offset
, ULONGEST len
,
509 ULONGEST
*xfered_len
) override
;
511 ULONGEST
get_memory_xfer_limit () override
;
513 void rcmd (const char *command
, struct ui_file
*output
) override
;
515 char *pid_to_exec_file (int pid
) override
;
517 void log_command (const char *cmd
) override
519 serial_log_command (this, cmd
);
522 CORE_ADDR
get_thread_local_address (ptid_t ptid
,
523 CORE_ADDR load_module_addr
,
524 CORE_ADDR offset
) override
;
526 bool can_execute_reverse () override
;
528 std::vector
<mem_region
> memory_map () override
;
530 void flash_erase (ULONGEST address
, LONGEST length
) override
;
532 void flash_done () override
;
534 const struct target_desc
*read_description () override
;
536 int search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
537 const gdb_byte
*pattern
, ULONGEST pattern_len
,
538 CORE_ADDR
*found_addrp
) override
;
540 bool can_async_p () override
;
542 bool is_async_p () override
;
544 void async (int) override
;
546 int async_wait_fd () override
;
548 void thread_events (int) override
;
550 int can_do_single_step () override
;
552 void terminal_inferior () override
;
554 void terminal_ours () override
;
556 bool supports_non_stop () override
;
558 bool supports_multi_process () override
;
560 bool supports_disable_randomization () override
;
562 bool filesystem_is_local () override
;
565 int fileio_open (struct inferior
*inf
, const char *filename
,
566 int flags
, int mode
, int warn_if_slow
,
567 int *target_errno
) override
;
569 int fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
570 ULONGEST offset
, int *target_errno
) override
;
572 int fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
573 ULONGEST offset
, int *target_errno
) override
;
575 int fileio_fstat (int fd
, struct stat
*sb
, int *target_errno
) override
;
577 int fileio_close (int fd
, int *target_errno
) override
;
579 int fileio_unlink (struct inferior
*inf
,
580 const char *filename
,
581 int *target_errno
) override
;
583 gdb::optional
<std::string
>
584 fileio_readlink (struct inferior
*inf
,
585 const char *filename
,
586 int *target_errno
) override
;
588 bool supports_enable_disable_tracepoint () override
;
590 bool supports_string_tracing () override
;
592 bool supports_evaluation_of_breakpoint_conditions () override
;
594 bool can_run_breakpoint_commands () override
;
596 void trace_init () override
;
598 void download_tracepoint (struct bp_location
*location
) override
;
600 bool can_download_tracepoint () override
;
602 void download_trace_state_variable (const trace_state_variable
&tsv
) override
;
604 void enable_tracepoint (struct bp_location
*location
) override
;
606 void disable_tracepoint (struct bp_location
*location
) override
;
608 void trace_set_readonly_regions () override
;
610 void trace_start () override
;
612 int get_trace_status (struct trace_status
*ts
) override
;
614 void get_tracepoint_status (struct breakpoint
*tp
, struct uploaded_tp
*utp
)
617 void trace_stop () override
;
619 int trace_find (enum trace_find_type type
, int num
,
620 CORE_ADDR addr1
, CORE_ADDR addr2
, int *tpp
) override
;
622 bool get_trace_state_variable_value (int tsv
, LONGEST
*val
) override
;
624 int save_trace_data (const char *filename
) override
;
626 int upload_tracepoints (struct uploaded_tp
**utpp
) override
;
628 int upload_trace_state_variables (struct uploaded_tsv
**utsvp
) override
;
630 LONGEST
get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
) override
;
632 int get_min_fast_tracepoint_insn_len () override
;
634 void set_disconnected_tracing (int val
) override
;
636 void set_circular_trace_buffer (int val
) override
;
638 void set_trace_buffer_size (LONGEST val
) override
;
640 bool set_trace_notes (const char *user
, const char *notes
,
641 const char *stopnotes
) override
;
643 int core_of_thread (ptid_t ptid
) override
;
645 int verify_memory (const gdb_byte
*data
,
646 CORE_ADDR memaddr
, ULONGEST size
) override
;
649 bool get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
) override
;
651 void set_permissions () override
;
653 bool static_tracepoint_marker_at (CORE_ADDR
,
654 struct static_tracepoint_marker
*marker
)
657 std::vector
<static_tracepoint_marker
>
658 static_tracepoint_markers_by_strid (const char *id
) override
;
660 traceframe_info_up
traceframe_info () override
;
662 bool use_agent (bool use
) override
;
663 bool can_use_agent () override
;
665 struct btrace_target_info
*enable_btrace (ptid_t ptid
,
666 const struct btrace_config
*conf
) override
;
668 void disable_btrace (struct btrace_target_info
*tinfo
) override
;
670 void teardown_btrace (struct btrace_target_info
*tinfo
) override
;
672 enum btrace_error
read_btrace (struct btrace_data
*data
,
673 struct btrace_target_info
*btinfo
,
674 enum btrace_read_type type
) override
;
676 const struct btrace_config
*btrace_conf (const struct btrace_target_info
*) override
;
677 bool augmented_libraries_svr4_read () override
;
678 bool follow_fork (bool, bool) override
;
679 void follow_exec (struct inferior
*, const char *) override
;
680 int insert_fork_catchpoint (int) override
;
681 int remove_fork_catchpoint (int) override
;
682 int insert_vfork_catchpoint (int) override
;
683 int remove_vfork_catchpoint (int) override
;
684 int insert_exec_catchpoint (int) override
;
685 int remove_exec_catchpoint (int) override
;
686 enum exec_direction_kind
execution_direction () override
;
688 public: /* Remote specific methods. */
690 void remote_download_command_source (int num
, ULONGEST addr
,
691 struct command_line
*cmds
);
693 void remote_file_put (const char *local_file
, const char *remote_file
,
695 void remote_file_get (const char *remote_file
, const char *local_file
,
697 void remote_file_delete (const char *remote_file
, int from_tty
);
699 int remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
700 ULONGEST offset
, int *remote_errno
);
701 int remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
702 ULONGEST offset
, int *remote_errno
);
703 int remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
704 ULONGEST offset
, int *remote_errno
);
706 int remote_hostio_send_command (int command_bytes
, int which_packet
,
707 int *remote_errno
, char **attachment
,
708 int *attachment_len
);
709 int remote_hostio_set_filesystem (struct inferior
*inf
,
711 /* We should get rid of this and use fileio_open directly. */
712 int remote_hostio_open (struct inferior
*inf
, const char *filename
,
713 int flags
, int mode
, int warn_if_slow
,
715 int remote_hostio_close (int fd
, int *remote_errno
);
717 int remote_hostio_unlink (inferior
*inf
, const char *filename
,
720 struct remote_state
*get_remote_state ();
722 long get_remote_packet_size (void);
723 long get_memory_packet_size (struct memory_packet_config
*config
);
725 long get_memory_write_packet_size ();
726 long get_memory_read_packet_size ();
728 char *append_pending_thread_resumptions (char *p
, char *endp
,
730 static void open_1 (const char *name
, int from_tty
, int extended_p
);
731 void start_remote (int from_tty
, int extended_p
);
732 void remote_detach_1 (struct inferior
*inf
, int from_tty
);
734 char *append_resumption (char *p
, char *endp
,
735 ptid_t ptid
, int step
, gdb_signal siggnal
);
736 int remote_resume_with_vcont (ptid_t ptid
, int step
,
739 void add_current_inferior_and_thread (char *wait_status
);
741 ptid_t
wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
742 target_wait_flags options
);
743 ptid_t
wait_as (ptid_t ptid
, target_waitstatus
*status
,
744 target_wait_flags options
);
746 ptid_t
process_stop_reply (struct stop_reply
*stop_reply
,
747 target_waitstatus
*status
);
749 void remote_notice_new_inferior (ptid_t currthread
, int executing
);
751 void process_initial_stop_replies (int from_tty
);
753 thread_info
*remote_add_thread (ptid_t ptid
, bool running
, bool executing
);
755 void btrace_sync_conf (const btrace_config
*conf
);
757 void remote_btrace_maybe_reopen ();
759 void remove_new_fork_children (threads_listing_context
*context
);
760 void kill_new_fork_children (int pid
);
761 void discard_pending_stop_replies (struct inferior
*inf
);
762 int stop_reply_queue_length ();
764 void check_pending_events_prevent_wildcard_vcont
765 (int *may_global_wildcard_vcont
);
767 void discard_pending_stop_replies_in_queue ();
768 struct stop_reply
*remote_notif_remove_queued_reply (ptid_t ptid
);
769 struct stop_reply
*queued_stop_reply (ptid_t ptid
);
770 int peek_stop_reply (ptid_t ptid
);
771 void remote_parse_stop_reply (const char *buf
, stop_reply
*event
);
773 void remote_stop_ns (ptid_t ptid
);
774 void remote_interrupt_as ();
775 void remote_interrupt_ns ();
777 char *remote_get_noisy_reply ();
778 int remote_query_attached (int pid
);
779 inferior
*remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
782 ptid_t
remote_current_thread (ptid_t oldpid
);
783 ptid_t
get_current_thread (char *wait_status
);
785 void set_thread (ptid_t ptid
, int gen
);
786 void set_general_thread (ptid_t ptid
);
787 void set_continue_thread (ptid_t ptid
);
788 void set_general_process ();
790 char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
792 int remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
793 gdb_ext_thread_info
*info
);
794 int remote_get_threadinfo (threadref
*threadid
, int fieldset
,
795 gdb_ext_thread_info
*info
);
797 int parse_threadlist_response (char *pkt
, int result_limit
,
798 threadref
*original_echo
,
799 threadref
*resultlist
,
801 int remote_get_threadlist (int startflag
, threadref
*nextthread
,
802 int result_limit
, int *done
, int *result_count
,
803 threadref
*threadlist
);
805 int remote_threadlist_iterator (rmt_thread_action stepfunction
,
806 void *context
, int looplimit
);
808 int remote_get_threads_with_ql (threads_listing_context
*context
);
809 int remote_get_threads_with_qxfer (threads_listing_context
*context
);
810 int remote_get_threads_with_qthreadinfo (threads_listing_context
*context
);
812 void extended_remote_restart ();
816 void remote_check_symbols ();
818 void remote_supported_packet (const struct protocol_feature
*feature
,
819 enum packet_support support
,
820 const char *argument
);
822 void remote_query_supported ();
824 void remote_packet_size (const protocol_feature
*feature
,
825 packet_support support
, const char *value
);
827 void remote_serial_quit_handler ();
829 void remote_detach_pid (int pid
);
831 void remote_vcont_probe ();
833 void remote_resume_with_hc (ptid_t ptid
, int step
,
836 void send_interrupt_sequence ();
837 void interrupt_query ();
839 void remote_notif_get_pending_events (notif_client
*nc
);
841 int fetch_register_using_p (struct regcache
*regcache
,
843 int send_g_packet ();
844 void process_g_packet (struct regcache
*regcache
);
845 void fetch_registers_using_g (struct regcache
*regcache
);
846 int store_register_using_P (const struct regcache
*regcache
,
848 void store_registers_using_G (const struct regcache
*regcache
);
850 void set_remote_traceframe ();
852 void check_binary_download (CORE_ADDR addr
);
854 target_xfer_status
remote_write_bytes_aux (const char *header
,
856 const gdb_byte
*myaddr
,
859 ULONGEST
*xfered_len_units
,
863 target_xfer_status
remote_write_bytes (CORE_ADDR memaddr
,
864 const gdb_byte
*myaddr
, ULONGEST len
,
865 int unit_size
, ULONGEST
*xfered_len
);
867 target_xfer_status
remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
869 int unit_size
, ULONGEST
*xfered_len_units
);
871 target_xfer_status
remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
875 ULONGEST
*xfered_len
);
877 target_xfer_status
remote_read_bytes (CORE_ADDR memaddr
,
878 gdb_byte
*myaddr
, ULONGEST len
,
880 ULONGEST
*xfered_len
);
882 packet_result
remote_send_printf (const char *format
, ...)
883 ATTRIBUTE_PRINTF (2, 3);
885 target_xfer_status
remote_flash_write (ULONGEST address
,
886 ULONGEST length
, ULONGEST
*xfered_len
,
887 const gdb_byte
*data
);
889 int readchar (int timeout
);
891 void remote_serial_write (const char *str
, int len
);
893 int putpkt (const char *buf
);
894 int putpkt_binary (const char *buf
, int cnt
);
896 int putpkt (const gdb::char_vector
&buf
)
898 return putpkt (buf
.data ());
902 long read_frame (gdb::char_vector
*buf_p
);
903 void getpkt (gdb::char_vector
*buf
, int forever
);
904 int getpkt_or_notif_sane_1 (gdb::char_vector
*buf
, int forever
,
905 int expecting_notif
, int *is_notif
);
906 int getpkt_sane (gdb::char_vector
*buf
, int forever
);
907 int getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
909 int remote_vkill (int pid
);
910 void remote_kill_k ();
912 void extended_remote_disable_randomization (int val
);
913 int extended_remote_run (const std::string
&args
);
915 void send_environment_packet (const char *action
,
919 void extended_remote_environment_support ();
920 void extended_remote_set_inferior_cwd ();
922 target_xfer_status
remote_write_qxfer (const char *object_name
,
924 const gdb_byte
*writebuf
,
925 ULONGEST offset
, LONGEST len
,
926 ULONGEST
*xfered_len
,
927 struct packet_config
*packet
);
929 target_xfer_status
remote_read_qxfer (const char *object_name
,
931 gdb_byte
*readbuf
, ULONGEST offset
,
933 ULONGEST
*xfered_len
,
934 struct packet_config
*packet
);
936 void push_stop_reply (struct stop_reply
*new_event
);
938 bool vcont_r_supported ();
940 void packet_command (const char *args
, int from_tty
);
942 private: /* data fields */
944 /* The remote state. Don't reference this directly. Use the
945 get_remote_state method instead. */
946 remote_state m_remote_state
;
949 static const target_info extended_remote_target_info
= {
951 N_("Extended remote serial target in gdb-specific protocol"),
955 /* Set up the extended remote target by extending the standard remote
956 target and adding to it. */
958 class extended_remote_target final
: public remote_target
961 const target_info
&info () const override
962 { return extended_remote_target_info
; }
964 /* Open an extended-remote connection. */
965 static void open (const char *, int);
967 bool can_create_inferior () override
{ return true; }
968 void create_inferior (const char *, const std::string
&,
969 char **, int) override
;
971 void detach (inferior
*, int) override
;
973 bool can_attach () override
{ return true; }
974 void attach (const char *, int) override
;
976 void post_attach (int) override
;
977 bool supports_disable_randomization () override
;
980 /* Per-program-space data key. */
981 static const struct program_space_key
<char, gdb::xfree_deleter
<char>>
984 /* The variable registered as the control variable used by the
985 remote exec-file commands. While the remote exec-file setting is
986 per-program-space, the set/show machinery uses this as the
987 location of the remote exec-file value. */
988 static char *remote_exec_file_var
;
990 /* The size to align memory write packets, when practical. The protocol
991 does not guarantee any alignment, and gdb will generate short
992 writes and unaligned writes, but even as a best-effort attempt this
993 can improve bulk transfers. For instance, if a write is misaligned
994 relative to the target's data bus, the stub may need to make an extra
995 round trip fetching data from the target. This doesn't make a
996 huge difference, but it's easy to do, so we try to be helpful.
998 The alignment chosen is arbitrary; usually data bus width is
999 important here, not the possibly larger cache line size. */
1000 enum { REMOTE_ALIGN_WRITES
= 16 };
1002 /* Prototypes for local functions. */
1004 static int hexnumlen (ULONGEST num
);
1006 static int stubhex (int ch
);
1008 static int hexnumstr (char *, ULONGEST
);
1010 static int hexnumnstr (char *, ULONGEST
, int);
1012 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
1014 static void print_packet (const char *);
1016 static int stub_unpack_int (char *buff
, int fieldlength
);
1018 struct packet_config
;
1020 static void show_packet_config_cmd (struct packet_config
*config
);
1022 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
1024 struct cmd_list_element
*c
,
1027 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
1029 static void remote_async_inferior_event_handler (gdb_client_data
);
1031 static bool remote_read_description_p (struct target_ops
*target
);
1033 static void remote_console_output (const char *msg
);
1035 static void remote_btrace_reset (remote_state
*rs
);
1037 static void remote_unpush_and_throw (remote_target
*target
);
1041 static struct cmd_list_element
*remote_cmdlist
;
1043 /* For "set remote" and "show remote". */
1045 static struct cmd_list_element
*remote_set_cmdlist
;
1046 static struct cmd_list_element
*remote_show_cmdlist
;
1048 /* Controls whether GDB is willing to use range stepping. */
1050 static bool use_range_stepping
= true;
1052 /* Private data that we'll store in (struct thread_info)->priv. */
1053 struct remote_thread_info
: public private_thread_info
1059 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1060 sequence of bytes. */
1061 gdb::byte_vector thread_handle
;
1063 /* Whether the target stopped for a breakpoint/watchpoint. */
1064 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1066 /* This is set to the data address of the access causing the target
1067 to stop for a watchpoint. */
1068 CORE_ADDR watch_data_address
= 0;
1070 /* Fields used by the vCont action coalescing implemented in
1071 remote_resume / remote_commit_resume. remote_resume stores each
1072 thread's last resume request in these fields, so that a later
1073 remote_commit_resume knows which is the proper action for this
1074 thread to include in the vCont packet. */
1076 /* True if the last target_resume call for this thread was a step
1077 request, false if a continue request. */
1078 int last_resume_step
= 0;
1080 /* The signal specified in the last target_resume call for this
1082 gdb_signal last_resume_sig
= GDB_SIGNAL_0
;
1084 /* Whether this thread was already vCont-resumed on the remote
1086 int vcont_resumed
= 0;
1089 remote_state::remote_state ()
1094 remote_state::~remote_state ()
1096 xfree (this->last_pass_packet
);
1097 xfree (this->last_program_signals_packet
);
1098 xfree (this->finished_object
);
1099 xfree (this->finished_annex
);
1102 /* Utility: generate error from an incoming stub packet. */
1104 trace_error (char *buf
)
1107 return; /* not an error msg */
1110 case '1': /* malformed packet error */
1111 if (*++buf
== '0') /* general case: */
1112 error (_("remote.c: error in outgoing packet."));
1114 error (_("remote.c: error in outgoing packet at field #%ld."),
1115 strtol (buf
, NULL
, 16));
1117 error (_("Target returns error code '%s'."), buf
);
1121 /* Utility: wait for reply from stub, while accepting "O" packets. */
1124 remote_target::remote_get_noisy_reply ()
1126 struct remote_state
*rs
= get_remote_state ();
1128 do /* Loop on reply from remote stub. */
1132 QUIT
; /* Allow user to bail out with ^C. */
1133 getpkt (&rs
->buf
, 0);
1134 buf
= rs
->buf
.data ();
1137 else if (startswith (buf
, "qRelocInsn:"))
1140 CORE_ADDR from
, to
, org_to
;
1142 int adjusted_size
= 0;
1145 p
= buf
+ strlen ("qRelocInsn:");
1146 pp
= unpack_varlen_hex (p
, &ul
);
1148 error (_("invalid qRelocInsn packet: %s"), buf
);
1152 unpack_varlen_hex (p
, &ul
);
1159 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
1162 catch (const gdb_exception
&ex
)
1164 if (ex
.error
== MEMORY_ERROR
)
1166 /* Propagate memory errors silently back to the
1167 target. The stub may have limited the range of
1168 addresses we can write to, for example. */
1172 /* Something unexpectedly bad happened. Be verbose
1173 so we can tell what, and propagate the error back
1174 to the stub, so it doesn't get stuck waiting for
1176 exception_fprintf (gdb_stderr
, ex
,
1177 _("warning: relocating instruction: "));
1184 adjusted_size
= to
- org_to
;
1186 xsnprintf (buf
, rs
->buf
.size (), "qRelocInsn:%x", adjusted_size
);
1190 else if (buf
[0] == 'O' && buf
[1] != 'K')
1191 remote_console_output (buf
+ 1); /* 'O' message from stub */
1193 return buf
; /* Here's the actual reply. */
1198 struct remote_arch_state
*
1199 remote_state::get_remote_arch_state (struct gdbarch
*gdbarch
)
1201 remote_arch_state
*rsa
;
1203 auto it
= this->m_arch_states
.find (gdbarch
);
1204 if (it
== this->m_arch_states
.end ())
1206 auto p
= this->m_arch_states
.emplace (std::piecewise_construct
,
1207 std::forward_as_tuple (gdbarch
),
1208 std::forward_as_tuple (gdbarch
));
1209 rsa
= &p
.first
->second
;
1211 /* Make sure that the packet buffer is plenty big enough for
1212 this architecture. */
1213 if (this->buf
.size () < rsa
->remote_packet_size
)
1214 this->buf
.resize (2 * rsa
->remote_packet_size
);
1222 /* Fetch the global remote target state. */
1225 remote_target::get_remote_state ()
1227 /* Make sure that the remote architecture state has been
1228 initialized, because doing so might reallocate rs->buf. Any
1229 function which calls getpkt also needs to be mindful of changes
1230 to rs->buf, but this call limits the number of places which run
1232 m_remote_state
.get_remote_arch_state (target_gdbarch ());
1234 return &m_remote_state
;
1237 /* Fetch the remote exec-file from the current program space. */
1240 get_remote_exec_file (void)
1242 char *remote_exec_file
;
1244 remote_exec_file
= remote_pspace_data
.get (current_program_space
);
1245 if (remote_exec_file
== NULL
)
1248 return remote_exec_file
;
1251 /* Set the remote exec file for PSPACE. */
1254 set_pspace_remote_exec_file (struct program_space
*pspace
,
1255 const char *remote_exec_file
)
1257 char *old_file
= remote_pspace_data
.get (pspace
);
1260 remote_pspace_data
.set (pspace
, xstrdup (remote_exec_file
));
1263 /* The "set/show remote exec-file" set command hook. */
1266 set_remote_exec_file (const char *ignored
, int from_tty
,
1267 struct cmd_list_element
*c
)
1269 gdb_assert (remote_exec_file_var
!= NULL
);
1270 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
1273 /* The "set/show remote exec-file" show command hook. */
1276 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
1277 struct cmd_list_element
*cmd
, const char *value
)
1279 fprintf_filtered (file
, "%s\n", get_remote_exec_file ());
1283 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
1285 int regnum
, num_remote_regs
, offset
;
1286 struct packet_reg
**remote_regs
;
1288 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
1290 struct packet_reg
*r
= ®s
[regnum
];
1292 if (register_size (gdbarch
, regnum
) == 0)
1293 /* Do not try to fetch zero-sized (placeholder) registers. */
1296 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
1301 /* Define the g/G packet format as the contents of each register
1302 with a remote protocol number, in order of ascending protocol
1305 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
1306 for (num_remote_regs
= 0, regnum
= 0;
1307 regnum
< gdbarch_num_regs (gdbarch
);
1309 if (regs
[regnum
].pnum
!= -1)
1310 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
1312 std::sort (remote_regs
, remote_regs
+ num_remote_regs
,
1313 [] (const packet_reg
*a
, const packet_reg
*b
)
1314 { return a
->pnum
< b
->pnum
; });
1316 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
1318 remote_regs
[regnum
]->in_g_packet
= 1;
1319 remote_regs
[regnum
]->offset
= offset
;
1320 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
1326 /* Given the architecture described by GDBARCH, return the remote
1327 protocol register's number and the register's offset in the g/G
1328 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1329 If the target does not have a mapping for REGNUM, return false,
1330 otherwise, return true. */
1333 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
1334 int *pnum
, int *poffset
)
1336 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
1338 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
1340 map_regcache_remote_table (gdbarch
, regs
.data ());
1342 *pnum
= regs
[regnum
].pnum
;
1343 *poffset
= regs
[regnum
].offset
;
1348 remote_arch_state::remote_arch_state (struct gdbarch
*gdbarch
)
1350 /* Use the architecture to build a regnum<->pnum table, which will be
1351 1:1 unless a feature set specifies otherwise. */
1352 this->regs
.reset (new packet_reg
[gdbarch_num_regs (gdbarch
)] ());
1354 /* Record the maximum possible size of the g packet - it may turn out
1356 this->sizeof_g_packet
1357 = map_regcache_remote_table (gdbarch
, this->regs
.get ());
1359 /* Default maximum number of characters in a packet body. Many
1360 remote stubs have a hardwired buffer size of 400 bytes
1361 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1362 as the maximum packet-size to ensure that the packet and an extra
1363 NUL character can always fit in the buffer. This stops GDB
1364 trashing stubs that try to squeeze an extra NUL into what is
1365 already a full buffer (As of 1999-12-04 that was most stubs). */
1366 this->remote_packet_size
= 400 - 1;
1368 /* This one is filled in when a ``g'' packet is received. */
1369 this->actual_register_packet_size
= 0;
1371 /* Should rsa->sizeof_g_packet needs more space than the
1372 default, adjust the size accordingly. Remember that each byte is
1373 encoded as two characters. 32 is the overhead for the packet
1374 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1375 (``$NN:G...#NN'') is a better guess, the below has been padded a
1377 if (this->sizeof_g_packet
> ((this->remote_packet_size
- 32) / 2))
1378 this->remote_packet_size
= (this->sizeof_g_packet
* 2 + 32);
1381 /* Get a pointer to the current remote target. If not connected to a
1382 remote target, return NULL. */
1384 static remote_target
*
1385 get_current_remote_target ()
1387 target_ops
*proc_target
= current_inferior ()->process_target ();
1388 return dynamic_cast<remote_target
*> (proc_target
);
1391 /* Return the current allowed size of a remote packet. This is
1392 inferred from the current architecture, and should be used to
1393 limit the length of outgoing packets. */
1395 remote_target::get_remote_packet_size ()
1397 struct remote_state
*rs
= get_remote_state ();
1398 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1400 if (rs
->explicit_packet_size
)
1401 return rs
->explicit_packet_size
;
1403 return rsa
->remote_packet_size
;
1406 static struct packet_reg
*
1407 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1410 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
1414 struct packet_reg
*r
= &rsa
->regs
[regnum
];
1416 gdb_assert (r
->regnum
== regnum
);
1421 static struct packet_reg
*
1422 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1427 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
1429 struct packet_reg
*r
= &rsa
->regs
[i
];
1431 if (r
->pnum
== pnum
)
1437 /* Allow the user to specify what sequence to send to the remote
1438 when he requests a program interruption: Although ^C is usually
1439 what remote systems expect (this is the default, here), it is
1440 sometimes preferable to send a break. On other systems such
1441 as the Linux kernel, a break followed by g, which is Magic SysRq g
1442 is required in order to interrupt the execution. */
1443 const char interrupt_sequence_control_c
[] = "Ctrl-C";
1444 const char interrupt_sequence_break
[] = "BREAK";
1445 const char interrupt_sequence_break_g
[] = "BREAK-g";
1446 static const char *const interrupt_sequence_modes
[] =
1448 interrupt_sequence_control_c
,
1449 interrupt_sequence_break
,
1450 interrupt_sequence_break_g
,
1453 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
1456 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
1457 struct cmd_list_element
*c
,
1460 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
1461 fprintf_filtered (file
,
1462 _("Send the ASCII ETX character (Ctrl-c) "
1463 "to the remote target to interrupt the "
1464 "execution of the program.\n"));
1465 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
1466 fprintf_filtered (file
,
1467 _("send a break signal to the remote target "
1468 "to interrupt the execution of the program.\n"));
1469 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
1470 fprintf_filtered (file
,
1471 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1472 "the remote target to interrupt the execution "
1473 "of Linux kernel.\n"));
1475 internal_error (__FILE__
, __LINE__
,
1476 _("Invalid value for interrupt_sequence_mode: %s."),
1477 interrupt_sequence_mode
);
1480 /* This boolean variable specifies whether interrupt_sequence is sent
1481 to the remote target when gdb connects to it.
1482 This is mostly needed when you debug the Linux kernel: The Linux kernel
1483 expects BREAK g which is Magic SysRq g for connecting gdb. */
1484 static bool interrupt_on_connect
= false;
1486 /* This variable is used to implement the "set/show remotebreak" commands.
1487 Since these commands are now deprecated in favor of "set/show remote
1488 interrupt-sequence", it no longer has any effect on the code. */
1489 static bool remote_break
;
1492 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1495 interrupt_sequence_mode
= interrupt_sequence_break
;
1497 interrupt_sequence_mode
= interrupt_sequence_control_c
;
1501 show_remotebreak (struct ui_file
*file
, int from_tty
,
1502 struct cmd_list_element
*c
,
1507 /* This variable sets the number of bits in an address that are to be
1508 sent in a memory ("M" or "m") packet. Normally, after stripping
1509 leading zeros, the entire address would be sent. This variable
1510 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1511 initial implementation of remote.c restricted the address sent in
1512 memory packets to ``host::sizeof long'' bytes - (typically 32
1513 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1514 address was never sent. Since fixing this bug may cause a break in
1515 some remote targets this variable is principally provided to
1516 facilitate backward compatibility. */
1518 static unsigned int remote_address_size
;
1521 /* User configurable variables for the number of characters in a
1522 memory read/write packet. MIN (rsa->remote_packet_size,
1523 rsa->sizeof_g_packet) is the default. Some targets need smaller
1524 values (fifo overruns, et.al.) and some users need larger values
1525 (speed up transfers). The variables ``preferred_*'' (the user
1526 request), ``current_*'' (what was actually set) and ``forced_*''
1527 (Positive - a soft limit, negative - a hard limit). */
1529 struct memory_packet_config
1536 /* The default max memory-write-packet-size, when the setting is
1537 "fixed". The 16k is historical. (It came from older GDB's using
1538 alloca for buffers and the knowledge (folklore?) that some hosts
1539 don't cope very well with large alloca calls.) */
1540 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1542 /* The minimum remote packet size for memory transfers. Ensures we
1543 can write at least one byte. */
1544 #define MIN_MEMORY_PACKET_SIZE 20
1546 /* Get the memory packet size, assuming it is fixed. */
1549 get_fixed_memory_packet_size (struct memory_packet_config
*config
)
1551 gdb_assert (config
->fixed_p
);
1553 if (config
->size
<= 0)
1554 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
;
1556 return config
->size
;
1559 /* Compute the current size of a read/write packet. Since this makes
1560 use of ``actual_register_packet_size'' the computation is dynamic. */
1563 remote_target::get_memory_packet_size (struct memory_packet_config
*config
)
1565 struct remote_state
*rs
= get_remote_state ();
1566 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1569 if (config
->fixed_p
)
1570 what_they_get
= get_fixed_memory_packet_size (config
);
1573 what_they_get
= get_remote_packet_size ();
1574 /* Limit the packet to the size specified by the user. */
1575 if (config
->size
> 0
1576 && what_they_get
> config
->size
)
1577 what_they_get
= config
->size
;
1579 /* Limit it to the size of the targets ``g'' response unless we have
1580 permission from the stub to use a larger packet size. */
1581 if (rs
->explicit_packet_size
== 0
1582 && rsa
->actual_register_packet_size
> 0
1583 && what_they_get
> rsa
->actual_register_packet_size
)
1584 what_they_get
= rsa
->actual_register_packet_size
;
1586 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1587 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1589 /* Make sure there is room in the global buffer for this packet
1590 (including its trailing NUL byte). */
1591 if (rs
->buf
.size () < what_they_get
+ 1)
1592 rs
->buf
.resize (2 * what_they_get
);
1594 return what_they_get
;
1597 /* Update the size of a read/write packet. If they user wants
1598 something really big then do a sanity check. */
1601 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1603 int fixed_p
= config
->fixed_p
;
1604 long size
= config
->size
;
1607 error (_("Argument required (integer, `fixed' or `limited')."));
1608 else if (strcmp (args
, "hard") == 0
1609 || strcmp (args
, "fixed") == 0)
1611 else if (strcmp (args
, "soft") == 0
1612 || strcmp (args
, "limit") == 0)
1618 size
= strtoul (args
, &end
, 0);
1620 error (_("Invalid %s (bad syntax)."), config
->name
);
1622 /* Instead of explicitly capping the size of a packet to or
1623 disallowing it, the user is allowed to set the size to
1624 something arbitrarily large. */
1628 if (fixed_p
&& !config
->fixed_p
)
1630 /* So that the query shows the correct value. */
1631 long query_size
= (size
<= 0
1632 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1635 if (! query (_("The target may not be able to correctly handle a %s\n"
1636 "of %ld bytes. Change the packet size? "),
1637 config
->name
, query_size
))
1638 error (_("Packet size not changed."));
1640 /* Update the config. */
1641 config
->fixed_p
= fixed_p
;
1642 config
->size
= size
;
1646 show_memory_packet_size (struct memory_packet_config
*config
)
1648 if (config
->size
== 0)
1649 printf_filtered (_("The %s is 0 (default). "), config
->name
);
1651 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1652 if (config
->fixed_p
)
1653 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1654 get_fixed_memory_packet_size (config
));
1657 remote_target
*remote
= get_current_remote_target ();
1660 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1661 remote
->get_memory_packet_size (config
));
1663 puts_filtered ("The actual limit will be further reduced "
1664 "dependent on the target.\n");
1668 /* FIXME: needs to be per-remote-target. */
1669 static struct memory_packet_config memory_write_packet_config
=
1671 "memory-write-packet-size",
1675 set_memory_write_packet_size (const char *args
, int from_tty
)
1677 set_memory_packet_size (args
, &memory_write_packet_config
);
1681 show_memory_write_packet_size (const char *args
, int from_tty
)
1683 show_memory_packet_size (&memory_write_packet_config
);
1686 /* Show the number of hardware watchpoints that can be used. */
1689 show_hardware_watchpoint_limit (struct ui_file
*file
, int from_tty
,
1690 struct cmd_list_element
*c
,
1693 fprintf_filtered (file
, _("The maximum number of target hardware "
1694 "watchpoints is %s.\n"), value
);
1697 /* Show the length limit (in bytes) for hardware watchpoints. */
1700 show_hardware_watchpoint_length_limit (struct ui_file
*file
, int from_tty
,
1701 struct cmd_list_element
*c
,
1704 fprintf_filtered (file
, _("The maximum length (in bytes) of a target "
1705 "hardware watchpoint is %s.\n"), value
);
1708 /* Show the number of hardware breakpoints that can be used. */
1711 show_hardware_breakpoint_limit (struct ui_file
*file
, int from_tty
,
1712 struct cmd_list_element
*c
,
1715 fprintf_filtered (file
, _("The maximum number of target hardware "
1716 "breakpoints is %s.\n"), value
);
1719 /* Controls the maximum number of characters to display in the debug output
1720 for each remote packet. The remaining characters are omitted. */
1722 static int remote_packet_max_chars
= 512;
1724 /* Show the maximum number of characters to display for each remote packet
1725 when remote debugging is enabled. */
1728 show_remote_packet_max_chars (struct ui_file
*file
, int from_tty
,
1729 struct cmd_list_element
*c
,
1732 fprintf_filtered (file
, _("Number of remote packet characters to "
1733 "display is %s.\n"), value
);
1737 remote_target::get_memory_write_packet_size ()
1739 return get_memory_packet_size (&memory_write_packet_config
);
1742 /* FIXME: needs to be per-remote-target. */
1743 static struct memory_packet_config memory_read_packet_config
=
1745 "memory-read-packet-size",
1749 set_memory_read_packet_size (const char *args
, int from_tty
)
1751 set_memory_packet_size (args
, &memory_read_packet_config
);
1755 show_memory_read_packet_size (const char *args
, int from_tty
)
1757 show_memory_packet_size (&memory_read_packet_config
);
1761 remote_target::get_memory_read_packet_size ()
1763 long size
= get_memory_packet_size (&memory_read_packet_config
);
1765 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1766 extra buffer size argument before the memory read size can be
1767 increased beyond this. */
1768 if (size
> get_remote_packet_size ())
1769 size
= get_remote_packet_size ();
1775 struct packet_config
1780 /* If auto, GDB auto-detects support for this packet or feature,
1781 either through qSupported, or by trying the packet and looking
1782 at the response. If true, GDB assumes the target supports this
1783 packet. If false, the packet is disabled. Configs that don't
1784 have an associated command always have this set to auto. */
1785 enum auto_boolean detect
;
1787 /* Does the target support this packet? */
1788 enum packet_support support
;
1791 static enum packet_support
packet_config_support (struct packet_config
*config
);
1792 static enum packet_support
packet_support (int packet
);
1795 show_packet_config_cmd (struct packet_config
*config
)
1797 const char *support
= "internal-error";
1799 switch (packet_config_support (config
))
1802 support
= "enabled";
1804 case PACKET_DISABLE
:
1805 support
= "disabled";
1807 case PACKET_SUPPORT_UNKNOWN
:
1808 support
= "unknown";
1811 switch (config
->detect
)
1813 case AUTO_BOOLEAN_AUTO
:
1814 printf_filtered (_("Support for the `%s' packet "
1815 "is auto-detected, currently %s.\n"),
1816 config
->name
, support
);
1818 case AUTO_BOOLEAN_TRUE
:
1819 case AUTO_BOOLEAN_FALSE
:
1820 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1821 config
->name
, support
);
1827 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1828 const char *title
, int legacy
)
1834 config
->name
= name
;
1835 config
->title
= title
;
1836 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet.",
1838 show_doc
= xstrprintf ("Show current use of remote "
1839 "protocol `%s' (%s) packet.",
1841 /* set/show TITLE-packet {auto,on,off} */
1842 cmd_name
= xstrprintf ("%s-packet", title
);
1843 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1844 &config
->detect
, set_doc
,
1845 show_doc
, NULL
, /* help_doc */
1847 show_remote_protocol_packet_cmd
,
1848 &remote_set_cmdlist
, &remote_show_cmdlist
);
1849 /* The command code copies the documentation strings. */
1852 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1857 legacy_name
= xstrprintf ("%s-packet", name
);
1858 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1859 &remote_set_cmdlist
);
1860 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1861 &remote_show_cmdlist
);
1865 static enum packet_result
1866 packet_check_result (const char *buf
)
1870 /* The stub recognized the packet request. Check that the
1871 operation succeeded. */
1873 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1875 /* "Enn" - definitely an error. */
1876 return PACKET_ERROR
;
1878 /* Always treat "E." as an error. This will be used for
1879 more verbose error messages, such as E.memtypes. */
1880 if (buf
[0] == 'E' && buf
[1] == '.')
1881 return PACKET_ERROR
;
1883 /* The packet may or may not be OK. Just assume it is. */
1887 /* The stub does not support the packet. */
1888 return PACKET_UNKNOWN
;
1891 static enum packet_result
1892 packet_check_result (const gdb::char_vector
&buf
)
1894 return packet_check_result (buf
.data ());
1897 static enum packet_result
1898 packet_ok (const char *buf
, struct packet_config
*config
)
1900 enum packet_result result
;
1902 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1903 && config
->support
== PACKET_DISABLE
)
1904 internal_error (__FILE__
, __LINE__
,
1905 _("packet_ok: attempt to use a disabled packet"));
1907 result
= packet_check_result (buf
);
1912 /* The stub recognized the packet request. */
1913 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1916 fprintf_unfiltered (gdb_stdlog
,
1917 "Packet %s (%s) is supported\n",
1918 config
->name
, config
->title
);
1919 config
->support
= PACKET_ENABLE
;
1922 case PACKET_UNKNOWN
:
1923 /* The stub does not support the packet. */
1924 if (config
->detect
== AUTO_BOOLEAN_AUTO
1925 && config
->support
== PACKET_ENABLE
)
1927 /* If the stub previously indicated that the packet was
1928 supported then there is a protocol error. */
1929 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1930 config
->name
, config
->title
);
1932 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1934 /* The user set it wrong. */
1935 error (_("Enabled packet %s (%s) not recognized by stub"),
1936 config
->name
, config
->title
);
1940 fprintf_unfiltered (gdb_stdlog
,
1941 "Packet %s (%s) is NOT supported\n",
1942 config
->name
, config
->title
);
1943 config
->support
= PACKET_DISABLE
;
1950 static enum packet_result
1951 packet_ok (const gdb::char_vector
&buf
, struct packet_config
*config
)
1953 return packet_ok (buf
.data (), config
);
1970 PACKET_vFile_pwrite
,
1972 PACKET_vFile_unlink
,
1973 PACKET_vFile_readlink
,
1976 PACKET_qXfer_features
,
1977 PACKET_qXfer_exec_file
,
1978 PACKET_qXfer_libraries
,
1979 PACKET_qXfer_libraries_svr4
,
1980 PACKET_qXfer_memory_map
,
1981 PACKET_qXfer_osdata
,
1982 PACKET_qXfer_threads
,
1983 PACKET_qXfer_statictrace_read
,
1984 PACKET_qXfer_traceframe_info
,
1990 PACKET_QPassSignals
,
1991 PACKET_QCatchSyscalls
,
1992 PACKET_QProgramSignals
,
1993 PACKET_QSetWorkingDir
,
1994 PACKET_QStartupWithShell
,
1995 PACKET_QEnvironmentHexEncoded
,
1996 PACKET_QEnvironmentReset
,
1997 PACKET_QEnvironmentUnset
,
1999 PACKET_qSearch_memory
,
2002 PACKET_QStartNoAckMode
,
2004 PACKET_qXfer_siginfo_read
,
2005 PACKET_qXfer_siginfo_write
,
2008 /* Support for conditional tracepoints. */
2009 PACKET_ConditionalTracepoints
,
2011 /* Support for target-side breakpoint conditions. */
2012 PACKET_ConditionalBreakpoints
,
2014 /* Support for target-side breakpoint commands. */
2015 PACKET_BreakpointCommands
,
2017 /* Support for fast tracepoints. */
2018 PACKET_FastTracepoints
,
2020 /* Support for static tracepoints. */
2021 PACKET_StaticTracepoints
,
2023 /* Support for installing tracepoints while a trace experiment is
2025 PACKET_InstallInTrace
,
2029 PACKET_TracepointSource
,
2032 PACKET_QDisableRandomization
,
2034 PACKET_QTBuffer_size
,
2038 PACKET_qXfer_btrace
,
2040 /* Support for the QNonStop packet. */
2043 /* Support for the QThreadEvents packet. */
2044 PACKET_QThreadEvents
,
2046 /* Support for multi-process extensions. */
2047 PACKET_multiprocess_feature
,
2049 /* Support for enabling and disabling tracepoints while a trace
2050 experiment is running. */
2051 PACKET_EnableDisableTracepoints_feature
,
2053 /* Support for collecting strings using the tracenz bytecode. */
2054 PACKET_tracenz_feature
,
2056 /* Support for continuing to run a trace experiment while GDB is
2058 PACKET_DisconnectedTracing_feature
,
2060 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2061 PACKET_augmented_libraries_svr4_read_feature
,
2063 /* Support for the qXfer:btrace-conf:read packet. */
2064 PACKET_qXfer_btrace_conf
,
2066 /* Support for the Qbtrace-conf:bts:size packet. */
2067 PACKET_Qbtrace_conf_bts_size
,
2069 /* Support for swbreak+ feature. */
2070 PACKET_swbreak_feature
,
2072 /* Support for hwbreak+ feature. */
2073 PACKET_hwbreak_feature
,
2075 /* Support for fork events. */
2076 PACKET_fork_event_feature
,
2078 /* Support for vfork events. */
2079 PACKET_vfork_event_feature
,
2081 /* Support for the Qbtrace-conf:pt:size packet. */
2082 PACKET_Qbtrace_conf_pt_size
,
2084 /* Support for exec events. */
2085 PACKET_exec_event_feature
,
2087 /* Support for query supported vCont actions. */
2088 PACKET_vContSupported
,
2090 /* Support remote CTRL-C. */
2093 /* Support TARGET_WAITKIND_NO_RESUMED. */
2099 /* FIXME: needs to be per-remote-target. Ignoring this for now,
2100 assuming all remote targets are the same server (thus all support
2101 the same packets). */
2102 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
2104 /* Returns the packet's corresponding "set remote foo-packet" command
2105 state. See struct packet_config for more details. */
2107 static enum auto_boolean
2108 packet_set_cmd_state (int packet
)
2110 return remote_protocol_packets
[packet
].detect
;
2113 /* Returns whether a given packet or feature is supported. This takes
2114 into account the state of the corresponding "set remote foo-packet"
2115 command, which may be used to bypass auto-detection. */
2117 static enum packet_support
2118 packet_config_support (struct packet_config
*config
)
2120 switch (config
->detect
)
2122 case AUTO_BOOLEAN_TRUE
:
2123 return PACKET_ENABLE
;
2124 case AUTO_BOOLEAN_FALSE
:
2125 return PACKET_DISABLE
;
2126 case AUTO_BOOLEAN_AUTO
:
2127 return config
->support
;
2129 gdb_assert_not_reached (_("bad switch"));
2133 /* Same as packet_config_support, but takes the packet's enum value as
2136 static enum packet_support
2137 packet_support (int packet
)
2139 struct packet_config
*config
= &remote_protocol_packets
[packet
];
2141 return packet_config_support (config
);
2145 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
2146 struct cmd_list_element
*c
,
2149 struct packet_config
*packet
;
2151 for (packet
= remote_protocol_packets
;
2152 packet
< &remote_protocol_packets
[PACKET_MAX
];
2155 if (&packet
->detect
== c
->var
)
2157 show_packet_config_cmd (packet
);
2161 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
2165 /* Should we try one of the 'Z' requests? */
2169 Z_PACKET_SOFTWARE_BP
,
2170 Z_PACKET_HARDWARE_BP
,
2177 /* For compatibility with older distributions. Provide a ``set remote
2178 Z-packet ...'' command that updates all the Z packet types. */
2180 static enum auto_boolean remote_Z_packet_detect
;
2183 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
2184 struct cmd_list_element
*c
)
2188 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2189 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
2193 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
2194 struct cmd_list_element
*c
,
2199 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2201 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
2205 /* Returns true if the multi-process extensions are in effect. */
2208 remote_multi_process_p (struct remote_state
*rs
)
2210 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
2213 /* Returns true if fork events are supported. */
2216 remote_fork_event_p (struct remote_state
*rs
)
2218 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
2221 /* Returns true if vfork events are supported. */
2224 remote_vfork_event_p (struct remote_state
*rs
)
2226 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
2229 /* Returns true if exec events are supported. */
2232 remote_exec_event_p (struct remote_state
*rs
)
2234 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
2237 /* Insert fork catchpoint target routine. If fork events are enabled
2238 then return success, nothing more to do. */
2241 remote_target::insert_fork_catchpoint (int pid
)
2243 struct remote_state
*rs
= get_remote_state ();
2245 return !remote_fork_event_p (rs
);
2248 /* Remove fork catchpoint target routine. Nothing to do, just
2252 remote_target::remove_fork_catchpoint (int pid
)
2257 /* Insert vfork catchpoint target routine. If vfork events are enabled
2258 then return success, nothing more to do. */
2261 remote_target::insert_vfork_catchpoint (int pid
)
2263 struct remote_state
*rs
= get_remote_state ();
2265 return !remote_vfork_event_p (rs
);
2268 /* Remove vfork catchpoint target routine. Nothing to do, just
2272 remote_target::remove_vfork_catchpoint (int pid
)
2277 /* Insert exec catchpoint target routine. If exec events are
2278 enabled, just return success. */
2281 remote_target::insert_exec_catchpoint (int pid
)
2283 struct remote_state
*rs
= get_remote_state ();
2285 return !remote_exec_event_p (rs
);
2288 /* Remove exec catchpoint target routine. Nothing to do, just
2292 remote_target::remove_exec_catchpoint (int pid
)
2299 /* Take advantage of the fact that the TID field is not used, to tag
2300 special ptids with it set to != 0. */
2301 static const ptid_t
magic_null_ptid (42000, -1, 1);
2302 static const ptid_t
not_sent_ptid (42000, -2, 1);
2303 static const ptid_t
any_thread_ptid (42000, 0, 1);
2305 /* Find out if the stub attached to PID (and hence GDB should offer to
2306 detach instead of killing it when bailing out). */
2309 remote_target::remote_query_attached (int pid
)
2311 struct remote_state
*rs
= get_remote_state ();
2312 size_t size
= get_remote_packet_size ();
2314 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
2317 if (remote_multi_process_p (rs
))
2318 xsnprintf (rs
->buf
.data (), size
, "qAttached:%x", pid
);
2320 xsnprintf (rs
->buf
.data (), size
, "qAttached");
2323 getpkt (&rs
->buf
, 0);
2325 switch (packet_ok (rs
->buf
,
2326 &remote_protocol_packets
[PACKET_qAttached
]))
2329 if (strcmp (rs
->buf
.data (), "1") == 0)
2333 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
2335 case PACKET_UNKNOWN
:
2342 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2343 has been invented by GDB, instead of reported by the target. Since
2344 we can be connected to a remote system before before knowing about
2345 any inferior, mark the target with execution when we find the first
2346 inferior. If ATTACHED is 1, then we had just attached to this
2347 inferior. If it is 0, then we just created this inferior. If it
2348 is -1, then try querying the remote stub to find out if it had
2349 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2350 attempt to open this inferior's executable as the main executable
2351 if no main executable is open already. */
2354 remote_target::remote_add_inferior (bool fake_pid_p
, int pid
, int attached
,
2357 struct inferior
*inf
;
2359 /* Check whether this process we're learning about is to be
2360 considered attached, or if is to be considered to have been
2361 spawned by the stub. */
2363 attached
= remote_query_attached (pid
);
2365 if (gdbarch_has_global_solist (target_gdbarch ()))
2367 /* If the target shares code across all inferiors, then every
2368 attach adds a new inferior. */
2369 inf
= add_inferior (pid
);
2371 /* ... and every inferior is bound to the same program space.
2372 However, each inferior may still have its own address
2374 inf
->aspace
= maybe_new_address_space ();
2375 inf
->pspace
= current_program_space
;
2379 /* In the traditional debugging scenario, there's a 1-1 match
2380 between program/address spaces. We simply bind the inferior
2381 to the program space's address space. */
2382 inf
= current_inferior ();
2384 /* However, if the current inferior is already bound to a
2385 process, find some other empty inferior. */
2389 for (inferior
*it
: all_inferiors ())
2398 /* Since all inferiors were already bound to a process, add
2400 inf
= add_inferior_with_spaces ();
2402 switch_to_inferior_no_thread (inf
);
2404 inferior_appeared (inf
, pid
);
2407 inf
->attach_flag
= attached
;
2408 inf
->fake_pid_p
= fake_pid_p
;
2410 /* If no main executable is currently open then attempt to
2411 open the file that was executed to create this inferior. */
2412 if (try_open_exec
&& get_exec_file (0) == NULL
)
2413 exec_file_locate_attach (pid
, 0, 1);
2415 /* Check for exec file mismatch, and let the user solve it. */
2416 validate_exec_file (1);
2421 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
2422 static remote_thread_info
*get_remote_thread_info (remote_target
*target
,
2425 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2426 according to RUNNING. */
2429 remote_target::remote_add_thread (ptid_t ptid
, bool running
, bool executing
)
2431 struct remote_state
*rs
= get_remote_state ();
2432 struct thread_info
*thread
;
2434 /* GDB historically didn't pull threads in the initial connection
2435 setup. If the remote target doesn't even have a concept of
2436 threads (e.g., a bare-metal target), even if internally we
2437 consider that a single-threaded target, mentioning a new thread
2438 might be confusing to the user. Be silent then, preserving the
2439 age old behavior. */
2440 if (rs
->starting_up
)
2441 thread
= add_thread_silent (this, ptid
);
2443 thread
= add_thread (this, ptid
);
2445 get_remote_thread_info (thread
)->vcont_resumed
= executing
;
2446 set_executing (this, ptid
, executing
);
2447 set_running (this, ptid
, running
);
2452 /* Come here when we learn about a thread id from the remote target.
2453 It may be the first time we hear about such thread, so take the
2454 opportunity to add it to GDB's thread list. In case this is the
2455 first time we're noticing its corresponding inferior, add it to
2456 GDB's inferior list as well. EXECUTING indicates whether the
2457 thread is (internally) executing or stopped. */
2460 remote_target::remote_notice_new_inferior (ptid_t currthread
, int executing
)
2462 /* In non-stop mode, we assume new found threads are (externally)
2463 running until proven otherwise with a stop reply. In all-stop,
2464 we can only get here if all threads are stopped. */
2465 int running
= target_is_non_stop_p () ? 1 : 0;
2467 /* If this is a new thread, add it to GDB's thread list.
2468 If we leave it up to WFI to do this, bad things will happen. */
2470 thread_info
*tp
= find_thread_ptid (this, currthread
);
2471 if (tp
!= NULL
&& tp
->state
== THREAD_EXITED
)
2473 /* We're seeing an event on a thread id we knew had exited.
2474 This has to be a new thread reusing the old id. Add it. */
2475 remote_add_thread (currthread
, running
, executing
);
2479 if (!in_thread_list (this, currthread
))
2481 struct inferior
*inf
= NULL
;
2482 int pid
= currthread
.pid ();
2484 if (inferior_ptid
.is_pid ()
2485 && pid
== inferior_ptid
.pid ())
2487 /* inferior_ptid has no thread member yet. This can happen
2488 with the vAttach -> remote_wait,"TAAthread:" path if the
2489 stub doesn't support qC. This is the first stop reported
2490 after an attach, so this is the main thread. Update the
2491 ptid in the thread list. */
2492 if (in_thread_list (this, ptid_t (pid
)))
2493 thread_change_ptid (this, inferior_ptid
, currthread
);
2497 = remote_add_thread (currthread
, running
, executing
);
2498 switch_to_thread (thr
);
2503 if (magic_null_ptid
== inferior_ptid
)
2505 /* inferior_ptid is not set yet. This can happen with the
2506 vRun -> remote_wait,"TAAthread:" path if the stub
2507 doesn't support qC. This is the first stop reported
2508 after an attach, so this is the main thread. Update the
2509 ptid in the thread list. */
2510 thread_change_ptid (this, inferior_ptid
, currthread
);
2514 /* When connecting to a target remote, or to a target
2515 extended-remote which already was debugging an inferior, we
2516 may not know about it yet. Add it before adding its child
2517 thread, so notifications are emitted in a sensible order. */
2518 if (find_inferior_pid (this, currthread
.pid ()) == NULL
)
2520 struct remote_state
*rs
= get_remote_state ();
2521 bool fake_pid_p
= !remote_multi_process_p (rs
);
2523 inf
= remote_add_inferior (fake_pid_p
,
2524 currthread
.pid (), -1, 1);
2527 /* This is really a new thread. Add it. */
2528 thread_info
*new_thr
2529 = remote_add_thread (currthread
, running
, executing
);
2531 /* If we found a new inferior, let the common code do whatever
2532 it needs to with it (e.g., read shared libraries, insert
2533 breakpoints), unless we're just setting up an all-stop
2537 struct remote_state
*rs
= get_remote_state ();
2539 if (!rs
->starting_up
)
2540 notice_new_inferior (new_thr
, executing
, 0);
2545 /* Return THREAD's private thread data, creating it if necessary. */
2547 static remote_thread_info
*
2548 get_remote_thread_info (thread_info
*thread
)
2550 gdb_assert (thread
!= NULL
);
2552 if (thread
->priv
== NULL
)
2553 thread
->priv
.reset (new remote_thread_info
);
2555 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
2558 /* Return PTID's private thread data, creating it if necessary. */
2560 static remote_thread_info
*
2561 get_remote_thread_info (remote_target
*target
, ptid_t ptid
)
2563 thread_info
*thr
= find_thread_ptid (target
, ptid
);
2564 return get_remote_thread_info (thr
);
2567 /* Call this function as a result of
2568 1) A halt indication (T packet) containing a thread id
2569 2) A direct query of currthread
2570 3) Successful execution of set thread */
2573 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2575 rs
->general_thread
= currthread
;
2578 /* If 'QPassSignals' is supported, tell the remote stub what signals
2579 it can simply pass through to the inferior without reporting. */
2582 remote_target::pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2584 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2586 char *pass_packet
, *p
;
2588 struct remote_state
*rs
= get_remote_state ();
2590 gdb_assert (pass_signals
.size () < 256);
2591 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2593 if (pass_signals
[i
])
2596 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2597 strcpy (pass_packet
, "QPassSignals:");
2598 p
= pass_packet
+ strlen (pass_packet
);
2599 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2601 if (pass_signals
[i
])
2604 *p
++ = tohex (i
>> 4);
2605 *p
++ = tohex (i
& 15);
2614 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2616 putpkt (pass_packet
);
2617 getpkt (&rs
->buf
, 0);
2618 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2619 xfree (rs
->last_pass_packet
);
2620 rs
->last_pass_packet
= pass_packet
;
2623 xfree (pass_packet
);
2627 /* If 'QCatchSyscalls' is supported, tell the remote stub
2628 to report syscalls to GDB. */
2631 remote_target::set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
2632 gdb::array_view
<const int> syscall_counts
)
2634 const char *catch_packet
;
2635 enum packet_result result
;
2638 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2640 /* Not supported. */
2644 if (needed
&& any_count
== 0)
2646 /* Count how many syscalls are to be caught. */
2647 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2649 if (syscall_counts
[i
] != 0)
2656 fprintf_unfiltered (gdb_stdlog
,
2657 "remote_set_syscall_catchpoint "
2658 "pid %d needed %d any_count %d n_sysno %d\n",
2659 pid
, needed
, any_count
, n_sysno
);
2662 std::string built_packet
;
2665 /* Prepare a packet with the sysno list, assuming max 8+1
2666 characters for a sysno. If the resulting packet size is too
2667 big, fallback on the non-selective packet. */
2668 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2669 built_packet
.reserve (maxpktsz
);
2670 built_packet
= "QCatchSyscalls:1";
2673 /* Add in each syscall to be caught. */
2674 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2676 if (syscall_counts
[i
] != 0)
2677 string_appendf (built_packet
, ";%zx", i
);
2680 if (built_packet
.size () > get_remote_packet_size ())
2682 /* catch_packet too big. Fallback to less efficient
2683 non selective mode, with GDB doing the filtering. */
2684 catch_packet
= "QCatchSyscalls:1";
2687 catch_packet
= built_packet
.c_str ();
2690 catch_packet
= "QCatchSyscalls:0";
2692 struct remote_state
*rs
= get_remote_state ();
2694 putpkt (catch_packet
);
2695 getpkt (&rs
->buf
, 0);
2696 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2697 if (result
== PACKET_OK
)
2703 /* If 'QProgramSignals' is supported, tell the remote stub what
2704 signals it should pass through to the inferior when detaching. */
2707 remote_target::program_signals (gdb::array_view
<const unsigned char> signals
)
2709 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2713 struct remote_state
*rs
= get_remote_state ();
2715 gdb_assert (signals
.size () < 256);
2716 for (size_t i
= 0; i
< signals
.size (); i
++)
2721 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2722 strcpy (packet
, "QProgramSignals:");
2723 p
= packet
+ strlen (packet
);
2724 for (size_t i
= 0; i
< signals
.size (); i
++)
2726 if (signal_pass_state (i
))
2729 *p
++ = tohex (i
>> 4);
2730 *p
++ = tohex (i
& 15);
2739 if (!rs
->last_program_signals_packet
2740 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2743 getpkt (&rs
->buf
, 0);
2744 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2745 xfree (rs
->last_program_signals_packet
);
2746 rs
->last_program_signals_packet
= packet
;
2753 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2754 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2755 thread. If GEN is set, set the general thread, if not, then set
2756 the step/continue thread. */
2758 remote_target::set_thread (ptid_t ptid
, int gen
)
2760 struct remote_state
*rs
= get_remote_state ();
2761 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2762 char *buf
= rs
->buf
.data ();
2763 char *endbuf
= buf
+ get_remote_packet_size ();
2769 *buf
++ = gen
? 'g' : 'c';
2770 if (ptid
== magic_null_ptid
)
2771 xsnprintf (buf
, endbuf
- buf
, "0");
2772 else if (ptid
== any_thread_ptid
)
2773 xsnprintf (buf
, endbuf
- buf
, "0");
2774 else if (ptid
== minus_one_ptid
)
2775 xsnprintf (buf
, endbuf
- buf
, "-1");
2777 write_ptid (buf
, endbuf
, ptid
);
2779 getpkt (&rs
->buf
, 0);
2781 rs
->general_thread
= ptid
;
2783 rs
->continue_thread
= ptid
;
2787 remote_target::set_general_thread (ptid_t ptid
)
2789 set_thread (ptid
, 1);
2793 remote_target::set_continue_thread (ptid_t ptid
)
2795 set_thread (ptid
, 0);
2798 /* Change the remote current process. Which thread within the process
2799 ends up selected isn't important, as long as it is the same process
2800 as what INFERIOR_PTID points to.
2802 This comes from that fact that there is no explicit notion of
2803 "selected process" in the protocol. The selected process for
2804 general operations is the process the selected general thread
2808 remote_target::set_general_process ()
2810 struct remote_state
*rs
= get_remote_state ();
2812 /* If the remote can't handle multiple processes, don't bother. */
2813 if (!remote_multi_process_p (rs
))
2816 /* We only need to change the remote current thread if it's pointing
2817 at some other process. */
2818 if (rs
->general_thread
.pid () != inferior_ptid
.pid ())
2819 set_general_thread (inferior_ptid
);
2823 /* Return nonzero if this is the main thread that we made up ourselves
2824 to model non-threaded targets as single-threaded. */
2827 remote_thread_always_alive (ptid_t ptid
)
2829 if (ptid
== magic_null_ptid
)
2830 /* The main thread is always alive. */
2833 if (ptid
.pid () != 0 && ptid
.lwp () == 0)
2834 /* The main thread is always alive. This can happen after a
2835 vAttach, if the remote side doesn't support
2842 /* Return nonzero if the thread PTID is still alive on the remote
2846 remote_target::thread_alive (ptid_t ptid
)
2848 struct remote_state
*rs
= get_remote_state ();
2851 /* Check if this is a thread that we made up ourselves to model
2852 non-threaded targets as single-threaded. */
2853 if (remote_thread_always_alive (ptid
))
2856 p
= rs
->buf
.data ();
2857 endp
= p
+ get_remote_packet_size ();
2860 write_ptid (p
, endp
, ptid
);
2863 getpkt (&rs
->buf
, 0);
2864 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2867 /* Return a pointer to a thread name if we know it and NULL otherwise.
2868 The thread_info object owns the memory for the name. */
2871 remote_target::thread_name (struct thread_info
*info
)
2873 if (info
->priv
!= NULL
)
2875 const std::string
&name
= get_remote_thread_info (info
)->name
;
2876 return !name
.empty () ? name
.c_str () : NULL
;
2882 /* About these extended threadlist and threadinfo packets. They are
2883 variable length packets but, the fields within them are often fixed
2884 length. They are redundant enough to send over UDP as is the
2885 remote protocol in general. There is a matching unit test module
2888 /* WARNING: This threadref data structure comes from the remote O.S.,
2889 libstub protocol encoding, and remote.c. It is not particularly
2892 /* Right now, the internal structure is int. We want it to be bigger.
2893 Plan to fix this. */
2895 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2897 /* gdb_ext_thread_info is an internal GDB data structure which is
2898 equivalent to the reply of the remote threadinfo packet. */
2900 struct gdb_ext_thread_info
2902 threadref threadid
; /* External form of thread reference. */
2903 int active
; /* Has state interesting to GDB?
2905 char display
[256]; /* Brief state display, name,
2906 blocked/suspended. */
2907 char shortname
[32]; /* To be used to name threads. */
2908 char more_display
[256]; /* Long info, statistics, queue depth,
2912 /* The volume of remote transfers can be limited by submitting
2913 a mask containing bits specifying the desired information.
2914 Use a union of these values as the 'selection' parameter to
2915 get_thread_info. FIXME: Make these TAG names more thread specific. */
2917 #define TAG_THREADID 1
2918 #define TAG_EXISTS 2
2919 #define TAG_DISPLAY 4
2920 #define TAG_THREADNAME 8
2921 #define TAG_MOREDISPLAY 16
2923 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2925 static char *unpack_nibble (char *buf
, int *val
);
2927 static char *unpack_byte (char *buf
, int *value
);
2929 static char *pack_int (char *buf
, int value
);
2931 static char *unpack_int (char *buf
, int *value
);
2933 static char *unpack_string (char *src
, char *dest
, int length
);
2935 static char *pack_threadid (char *pkt
, threadref
*id
);
2937 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2939 void int_to_threadref (threadref
*id
, int value
);
2941 static int threadref_to_int (threadref
*ref
);
2943 static void copy_threadref (threadref
*dest
, threadref
*src
);
2945 static int threadmatch (threadref
*dest
, threadref
*src
);
2947 static char *pack_threadinfo_request (char *pkt
, int mode
,
2950 static char *pack_threadlist_request (char *pkt
, int startflag
,
2952 threadref
*nextthread
);
2954 static int remote_newthread_step (threadref
*ref
, void *context
);
2957 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2958 buffer we're allowed to write to. Returns
2959 BUF+CHARACTERS_WRITTEN. */
2962 remote_target::write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2965 struct remote_state
*rs
= get_remote_state ();
2967 if (remote_multi_process_p (rs
))
2971 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2973 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2977 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2979 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2984 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2985 last parsed char. Returns null_ptid if no thread id is found, and
2986 throws an error if the thread id has an invalid format. */
2989 read_ptid (const char *buf
, const char **obuf
)
2991 const char *p
= buf
;
2993 ULONGEST pid
= 0, tid
= 0;
2997 /* Multi-process ptid. */
2998 pp
= unpack_varlen_hex (p
+ 1, &pid
);
3000 error (_("invalid remote ptid: %s"), p
);
3003 pp
= unpack_varlen_hex (p
+ 1, &tid
);
3006 return ptid_t (pid
, tid
, 0);
3009 /* No multi-process. Just a tid. */
3010 pp
= unpack_varlen_hex (p
, &tid
);
3012 /* Return null_ptid when no thread id is found. */
3020 /* Since the stub is not sending a process id, then default to
3021 what's in inferior_ptid, unless it's null at this point. If so,
3022 then since there's no way to know the pid of the reported
3023 threads, use the magic number. */
3024 if (inferior_ptid
== null_ptid
)
3025 pid
= magic_null_ptid
.pid ();
3027 pid
= inferior_ptid
.pid ();
3031 return ptid_t (pid
, tid
, 0);
3037 if (ch
>= 'a' && ch
<= 'f')
3038 return ch
- 'a' + 10;
3039 if (ch
>= '0' && ch
<= '9')
3041 if (ch
>= 'A' && ch
<= 'F')
3042 return ch
- 'A' + 10;
3047 stub_unpack_int (char *buff
, int fieldlength
)
3054 nibble
= stubhex (*buff
++);
3058 retval
= retval
<< 4;
3064 unpack_nibble (char *buf
, int *val
)
3066 *val
= fromhex (*buf
++);
3071 unpack_byte (char *buf
, int *value
)
3073 *value
= stub_unpack_int (buf
, 2);
3078 pack_int (char *buf
, int value
)
3080 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
3081 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
3082 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
3083 buf
= pack_hex_byte (buf
, (value
& 0xff));
3088 unpack_int (char *buf
, int *value
)
3090 *value
= stub_unpack_int (buf
, 8);
3094 #if 0 /* Currently unused, uncomment when needed. */
3095 static char *pack_string (char *pkt
, char *string
);
3098 pack_string (char *pkt
, char *string
)
3103 len
= strlen (string
);
3105 len
= 200; /* Bigger than most GDB packets, junk??? */
3106 pkt
= pack_hex_byte (pkt
, len
);
3110 if ((ch
== '\0') || (ch
== '#'))
3111 ch
= '*'; /* Protect encapsulation. */
3116 #endif /* 0 (unused) */
3119 unpack_string (char *src
, char *dest
, int length
)
3128 pack_threadid (char *pkt
, threadref
*id
)
3131 unsigned char *altid
;
3133 altid
= (unsigned char *) id
;
3134 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
3136 pkt
= pack_hex_byte (pkt
, *altid
++);
3142 unpack_threadid (char *inbuf
, threadref
*id
)
3145 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
3148 altref
= (char *) id
;
3150 while (inbuf
< limit
)
3152 x
= stubhex (*inbuf
++);
3153 y
= stubhex (*inbuf
++);
3154 *altref
++ = (x
<< 4) | y
;
3159 /* Externally, threadrefs are 64 bits but internally, they are still
3160 ints. This is due to a mismatch of specifications. We would like
3161 to use 64bit thread references internally. This is an adapter
3165 int_to_threadref (threadref
*id
, int value
)
3167 unsigned char *scan
;
3169 scan
= (unsigned char *) id
;
3175 *scan
++ = (value
>> 24) & 0xff;
3176 *scan
++ = (value
>> 16) & 0xff;
3177 *scan
++ = (value
>> 8) & 0xff;
3178 *scan
++ = (value
& 0xff);
3182 threadref_to_int (threadref
*ref
)
3185 unsigned char *scan
;
3191 value
= (value
<< 8) | ((*scan
++) & 0xff);
3196 copy_threadref (threadref
*dest
, threadref
*src
)
3199 unsigned char *csrc
, *cdest
;
3201 csrc
= (unsigned char *) src
;
3202 cdest
= (unsigned char *) dest
;
3209 threadmatch (threadref
*dest
, threadref
*src
)
3211 /* Things are broken right now, so just assume we got a match. */
3213 unsigned char *srcp
, *destp
;
3215 srcp
= (char *) src
;
3216 destp
= (char *) dest
;
3220 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
3227 threadid:1, # always request threadid
3234 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3237 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
3239 *pkt
++ = 'q'; /* Info Query */
3240 *pkt
++ = 'P'; /* process or thread info */
3241 pkt
= pack_int (pkt
, mode
); /* mode */
3242 pkt
= pack_threadid (pkt
, id
); /* threadid */
3243 *pkt
= '\0'; /* terminate */
3247 /* These values tag the fields in a thread info response packet. */
3248 /* Tagging the fields allows us to request specific fields and to
3249 add more fields as time goes by. */
3251 #define TAG_THREADID 1 /* Echo the thread identifier. */
3252 #define TAG_EXISTS 2 /* Is this process defined enough to
3253 fetch registers and its stack? */
3254 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3255 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3256 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3260 remote_target::remote_unpack_thread_info_response (char *pkt
,
3261 threadref
*expectedref
,
3262 gdb_ext_thread_info
*info
)
3264 struct remote_state
*rs
= get_remote_state ();
3268 char *limit
= pkt
+ rs
->buf
.size (); /* Plausible parsing limit. */
3271 /* info->threadid = 0; FIXME: implement zero_threadref. */
3273 info
->display
[0] = '\0';
3274 info
->shortname
[0] = '\0';
3275 info
->more_display
[0] = '\0';
3277 /* Assume the characters indicating the packet type have been
3279 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
3280 pkt
= unpack_threadid (pkt
, &ref
);
3283 warning (_("Incomplete response to threadinfo request."));
3284 if (!threadmatch (&ref
, expectedref
))
3285 { /* This is an answer to a different request. */
3286 warning (_("ERROR RMT Thread info mismatch."));
3289 copy_threadref (&info
->threadid
, &ref
);
3291 /* Loop on tagged fields , try to bail if something goes wrong. */
3293 /* Packets are terminated with nulls. */
3294 while ((pkt
< limit
) && mask
&& *pkt
)
3296 pkt
= unpack_int (pkt
, &tag
); /* tag */
3297 pkt
= unpack_byte (pkt
, &length
); /* length */
3298 if (!(tag
& mask
)) /* Tags out of synch with mask. */
3300 warning (_("ERROR RMT: threadinfo tag mismatch."));
3304 if (tag
== TAG_THREADID
)
3308 warning (_("ERROR RMT: length of threadid is not 16."));
3312 pkt
= unpack_threadid (pkt
, &ref
);
3313 mask
= mask
& ~TAG_THREADID
;
3316 if (tag
== TAG_EXISTS
)
3318 info
->active
= stub_unpack_int (pkt
, length
);
3320 mask
= mask
& ~(TAG_EXISTS
);
3323 warning (_("ERROR RMT: 'exists' length too long."));
3329 if (tag
== TAG_THREADNAME
)
3331 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
3332 mask
= mask
& ~TAG_THREADNAME
;
3335 if (tag
== TAG_DISPLAY
)
3337 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
3338 mask
= mask
& ~TAG_DISPLAY
;
3341 if (tag
== TAG_MOREDISPLAY
)
3343 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
3344 mask
= mask
& ~TAG_MOREDISPLAY
;
3347 warning (_("ERROR RMT: unknown thread info tag."));
3348 break; /* Not a tag we know about. */
3354 remote_target::remote_get_threadinfo (threadref
*threadid
,
3356 gdb_ext_thread_info
*info
)
3358 struct remote_state
*rs
= get_remote_state ();
3361 pack_threadinfo_request (rs
->buf
.data (), fieldset
, threadid
);
3363 getpkt (&rs
->buf
, 0);
3365 if (rs
->buf
[0] == '\0')
3368 result
= remote_unpack_thread_info_response (&rs
->buf
[2],
3373 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3376 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
3377 threadref
*nextthread
)
3379 *pkt
++ = 'q'; /* info query packet */
3380 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
3381 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
3382 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
3383 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
3388 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3391 remote_target::parse_threadlist_response (char *pkt
, int result_limit
,
3392 threadref
*original_echo
,
3393 threadref
*resultlist
,
3396 struct remote_state
*rs
= get_remote_state ();
3398 int count
, resultcount
, done
;
3401 /* Assume the 'q' and 'M chars have been stripped. */
3402 limit
= pkt
+ (rs
->buf
.size () - BUF_THREAD_ID_SIZE
);
3403 /* done parse past here */
3404 pkt
= unpack_byte (pkt
, &count
); /* count field */
3405 pkt
= unpack_nibble (pkt
, &done
);
3406 /* The first threadid is the argument threadid. */
3407 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
3408 while ((count
-- > 0) && (pkt
< limit
))
3410 pkt
= unpack_threadid (pkt
, resultlist
++);
3411 if (resultcount
++ >= result_limit
)
3419 /* Fetch the next batch of threads from the remote. Returns -1 if the
3420 qL packet is not supported, 0 on error and 1 on success. */
3423 remote_target::remote_get_threadlist (int startflag
, threadref
*nextthread
,
3424 int result_limit
, int *done
, int *result_count
,
3425 threadref
*threadlist
)
3427 struct remote_state
*rs
= get_remote_state ();
3430 /* Truncate result limit to be smaller than the packet size. */
3431 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
3432 >= get_remote_packet_size ())
3433 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
3435 pack_threadlist_request (rs
->buf
.data (), startflag
, result_limit
,
3438 getpkt (&rs
->buf
, 0);
3439 if (rs
->buf
[0] == '\0')
3441 /* Packet not supported. */
3446 parse_threadlist_response (&rs
->buf
[2], result_limit
,
3447 &rs
->echo_nextthread
, threadlist
, done
);
3449 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
3451 /* FIXME: This is a good reason to drop the packet. */
3452 /* Possibly, there is a duplicate response. */
3454 retransmit immediatly - race conditions
3455 retransmit after timeout - yes
3457 wait for packet, then exit
3459 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3460 return 0; /* I choose simply exiting. */
3462 if (*result_count
<= 0)
3466 warning (_("RMT ERROR : failed to get remote thread list."));
3469 return result
; /* break; */
3471 if (*result_count
> result_limit
)
3474 warning (_("RMT ERROR: threadlist response longer than requested."));
3480 /* Fetch the list of remote threads, with the qL packet, and call
3481 STEPFUNCTION for each thread found. Stops iterating and returns 1
3482 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3483 STEPFUNCTION returns false. If the packet is not supported,
3487 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction
,
3488 void *context
, int looplimit
)
3490 struct remote_state
*rs
= get_remote_state ();
3491 int done
, i
, result_count
;
3499 if (loopcount
++ > looplimit
)
3502 warning (_("Remote fetch threadlist -infinite loop-."));
3505 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
3506 MAXTHREADLISTRESULTS
,
3507 &done
, &result_count
,
3508 rs
->resultthreadlist
);
3511 /* Clear for later iterations. */
3513 /* Setup to resume next batch of thread references, set nextthread. */
3514 if (result_count
>= 1)
3515 copy_threadref (&rs
->nextthread
,
3516 &rs
->resultthreadlist
[result_count
- 1]);
3518 while (result_count
--)
3520 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
3530 /* A thread found on the remote target. */
3534 explicit thread_item (ptid_t ptid_
)
3538 thread_item (thread_item
&&other
) = default;
3539 thread_item
&operator= (thread_item
&&other
) = default;
3541 DISABLE_COPY_AND_ASSIGN (thread_item
);
3543 /* The thread's PTID. */
3546 /* The thread's extra info. */
3549 /* The thread's name. */
3552 /* The core the thread was running on. -1 if not known. */
3555 /* The thread handle associated with the thread. */
3556 gdb::byte_vector thread_handle
;
3559 /* Context passed around to the various methods listing remote
3560 threads. As new threads are found, they're added to the ITEMS
3563 struct threads_listing_context
3565 /* Return true if this object contains an entry for a thread with ptid
3568 bool contains_thread (ptid_t ptid
) const
3570 auto match_ptid
= [&] (const thread_item
&item
)
3572 return item
.ptid
== ptid
;
3575 auto it
= std::find_if (this->items
.begin (),
3579 return it
!= this->items
.end ();
3582 /* Remove the thread with ptid PTID. */
3584 void remove_thread (ptid_t ptid
)
3586 auto match_ptid
= [&] (const thread_item
&item
)
3588 return item
.ptid
== ptid
;
3591 auto it
= std::remove_if (this->items
.begin (),
3595 if (it
!= this->items
.end ())
3596 this->items
.erase (it
);
3599 /* The threads found on the remote target. */
3600 std::vector
<thread_item
> items
;
3604 remote_newthread_step (threadref
*ref
, void *data
)
3606 struct threads_listing_context
*context
3607 = (struct threads_listing_context
*) data
;
3608 int pid
= inferior_ptid
.pid ();
3609 int lwp
= threadref_to_int (ref
);
3610 ptid_t
ptid (pid
, lwp
);
3612 context
->items
.emplace_back (ptid
);
3614 return 1; /* continue iterator */
3617 #define CRAZY_MAX_THREADS 1000
3620 remote_target::remote_current_thread (ptid_t oldpid
)
3622 struct remote_state
*rs
= get_remote_state ();
3625 getpkt (&rs
->buf
, 0);
3626 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3631 result
= read_ptid (&rs
->buf
[2], &obuf
);
3632 if (*obuf
!= '\0' && remote_debug
)
3633 fprintf_unfiltered (gdb_stdlog
,
3634 "warning: garbage in qC reply\n");
3642 /* List remote threads using the deprecated qL packet. */
3645 remote_target::remote_get_threads_with_ql (threads_listing_context
*context
)
3647 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3648 CRAZY_MAX_THREADS
) >= 0)
3654 #if defined(HAVE_LIBEXPAT)
3657 start_thread (struct gdb_xml_parser
*parser
,
3658 const struct gdb_xml_element
*element
,
3660 std::vector
<gdb_xml_value
> &attributes
)
3662 struct threads_listing_context
*data
3663 = (struct threads_listing_context
*) user_data
;
3664 struct gdb_xml_value
*attr
;
3666 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3667 ptid_t ptid
= read_ptid (id
, NULL
);
3669 data
->items
.emplace_back (ptid
);
3670 thread_item
&item
= data
->items
.back ();
3672 attr
= xml_find_attribute (attributes
, "core");
3674 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3676 attr
= xml_find_attribute (attributes
, "name");
3678 item
.name
= (const char *) attr
->value
.get ();
3680 attr
= xml_find_attribute (attributes
, "handle");
3682 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3686 end_thread (struct gdb_xml_parser
*parser
,
3687 const struct gdb_xml_element
*element
,
3688 void *user_data
, const char *body_text
)
3690 struct threads_listing_context
*data
3691 = (struct threads_listing_context
*) user_data
;
3693 if (body_text
!= NULL
&& *body_text
!= '\0')
3694 data
->items
.back ().extra
= body_text
;
3697 const struct gdb_xml_attribute thread_attributes
[] = {
3698 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3699 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3700 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3701 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3702 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3705 const struct gdb_xml_element thread_children
[] = {
3706 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3709 const struct gdb_xml_element threads_children
[] = {
3710 { "thread", thread_attributes
, thread_children
,
3711 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3712 start_thread
, end_thread
},
3713 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3716 const struct gdb_xml_element threads_elements
[] = {
3717 { "threads", NULL
, threads_children
,
3718 GDB_XML_EF_NONE
, NULL
, NULL
},
3719 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3724 /* List remote threads using qXfer:threads:read. */
3727 remote_target::remote_get_threads_with_qxfer (threads_listing_context
*context
)
3729 #if defined(HAVE_LIBEXPAT)
3730 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3732 gdb::optional
<gdb::char_vector
> xml
3733 = target_read_stralloc (this, TARGET_OBJECT_THREADS
, NULL
);
3735 if (xml
&& (*xml
)[0] != '\0')
3737 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3738 threads_elements
, xml
->data (), context
);
3748 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3751 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context
*context
)
3753 struct remote_state
*rs
= get_remote_state ();
3755 if (rs
->use_threadinfo_query
)
3759 putpkt ("qfThreadInfo");
3760 getpkt (&rs
->buf
, 0);
3761 bufp
= rs
->buf
.data ();
3762 if (bufp
[0] != '\0') /* q packet recognized */
3764 while (*bufp
++ == 'm') /* reply contains one or more TID */
3768 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3769 context
->items
.emplace_back (ptid
);
3771 while (*bufp
++ == ','); /* comma-separated list */
3772 putpkt ("qsThreadInfo");
3773 getpkt (&rs
->buf
, 0);
3774 bufp
= rs
->buf
.data ();
3780 /* Packet not recognized. */
3781 rs
->use_threadinfo_query
= 0;
3788 /* Return true if INF only has one non-exited thread. */
3791 has_single_non_exited_thread (inferior
*inf
)
3794 for (thread_info
*tp ATTRIBUTE_UNUSED
: inf
->non_exited_threads ())
3800 /* Implement the to_update_thread_list function for the remote
3804 remote_target::update_thread_list ()
3806 struct threads_listing_context context
;
3809 /* We have a few different mechanisms to fetch the thread list. Try
3810 them all, starting with the most preferred one first, falling
3811 back to older methods. */
3812 if (remote_get_threads_with_qxfer (&context
)
3813 || remote_get_threads_with_qthreadinfo (&context
)
3814 || remote_get_threads_with_ql (&context
))
3818 if (context
.items
.empty ()
3819 && remote_thread_always_alive (inferior_ptid
))
3821 /* Some targets don't really support threads, but still
3822 reply an (empty) thread list in response to the thread
3823 listing packets, instead of replying "packet not
3824 supported". Exit early so we don't delete the main
3829 /* CONTEXT now holds the current thread list on the remote
3830 target end. Delete GDB-side threads no longer found on the
3832 for (thread_info
*tp
: all_threads_safe ())
3834 if (tp
->inf
->process_target () != this)
3837 if (!context
.contains_thread (tp
->ptid
))
3839 /* Do not remove the thread if it is the last thread in
3840 the inferior. This situation happens when we have a
3841 pending exit process status to process. Otherwise we
3842 may end up with a seemingly live inferior (i.e. pid
3843 != 0) that has no threads. */
3844 if (has_single_non_exited_thread (tp
->inf
))
3852 /* Remove any unreported fork child threads from CONTEXT so
3853 that we don't interfere with follow fork, which is where
3854 creation of such threads is handled. */
3855 remove_new_fork_children (&context
);
3857 /* And now add threads we don't know about yet to our list. */
3858 for (thread_item
&item
: context
.items
)
3860 if (item
.ptid
!= null_ptid
)
3862 /* In non-stop mode, we assume new found threads are
3863 executing until proven otherwise with a stop reply.
3864 In all-stop, we can only get here if all threads are
3866 int executing
= target_is_non_stop_p () ? 1 : 0;
3868 remote_notice_new_inferior (item
.ptid
, executing
);
3870 thread_info
*tp
= find_thread_ptid (this, item
.ptid
);
3871 remote_thread_info
*info
= get_remote_thread_info (tp
);
3872 info
->core
= item
.core
;
3873 info
->extra
= std::move (item
.extra
);
3874 info
->name
= std::move (item
.name
);
3875 info
->thread_handle
= std::move (item
.thread_handle
);
3882 /* If no thread listing method is supported, then query whether
3883 each known thread is alive, one by one, with the T packet.
3884 If the target doesn't support threads at all, then this is a
3885 no-op. See remote_thread_alive. */
3891 * Collect a descriptive string about the given thread.
3892 * The target may say anything it wants to about the thread
3893 * (typically info about its blocked / runnable state, name, etc.).
3894 * This string will appear in the info threads display.
3896 * Optional: targets are not required to implement this function.
3900 remote_target::extra_thread_info (thread_info
*tp
)
3902 struct remote_state
*rs
= get_remote_state ();
3905 struct gdb_ext_thread_info threadinfo
;
3907 if (rs
->remote_desc
== 0) /* paranoia */
3908 internal_error (__FILE__
, __LINE__
,
3909 _("remote_threads_extra_info"));
3911 if (tp
->ptid
== magic_null_ptid
3912 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
3913 /* This is the main thread which was added by GDB. The remote
3914 server doesn't know about it. */
3917 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
3919 /* If already have cached info, use it. */
3920 if (!extra
.empty ())
3921 return extra
.c_str ();
3923 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3925 /* If we're using qXfer:threads:read, then the extra info is
3926 included in the XML. So if we didn't have anything cached,
3927 it's because there's really no extra info. */
3931 if (rs
->use_threadextra_query
)
3933 char *b
= rs
->buf
.data ();
3934 char *endb
= b
+ get_remote_packet_size ();
3936 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3938 write_ptid (b
, endb
, tp
->ptid
);
3941 getpkt (&rs
->buf
, 0);
3942 if (rs
->buf
[0] != 0)
3944 extra
.resize (strlen (rs
->buf
.data ()) / 2);
3945 hex2bin (rs
->buf
.data (), (gdb_byte
*) &extra
[0], extra
.size ());
3946 return extra
.c_str ();
3950 /* If the above query fails, fall back to the old method. */
3951 rs
->use_threadextra_query
= 0;
3952 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3953 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3954 int_to_threadref (&id
, tp
->ptid
.lwp ());
3955 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3956 if (threadinfo
.active
)
3958 if (*threadinfo
.shortname
)
3959 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
3960 if (*threadinfo
.display
)
3962 if (!extra
.empty ())
3964 string_appendf (extra
, " State: %s", threadinfo
.display
);
3966 if (*threadinfo
.more_display
)
3968 if (!extra
.empty ())
3970 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
3972 return extra
.c_str ();
3979 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
3980 struct static_tracepoint_marker
*marker
)
3982 struct remote_state
*rs
= get_remote_state ();
3983 char *p
= rs
->buf
.data ();
3985 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3987 p
+= hexnumstr (p
, addr
);
3989 getpkt (&rs
->buf
, 0);
3990 p
= rs
->buf
.data ();
3993 error (_("Remote failure reply: %s"), p
);
3997 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
4004 std::vector
<static_tracepoint_marker
>
4005 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
4007 struct remote_state
*rs
= get_remote_state ();
4008 std::vector
<static_tracepoint_marker
> markers
;
4010 static_tracepoint_marker marker
;
4012 /* Ask for a first packet of static tracepoint marker
4015 getpkt (&rs
->buf
, 0);
4016 p
= rs
->buf
.data ();
4018 error (_("Remote failure reply: %s"), p
);
4024 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
4026 if (strid
== NULL
|| marker
.str_id
== strid
)
4027 markers
.push_back (std::move (marker
));
4029 while (*p
++ == ','); /* comma-separated list */
4030 /* Ask for another packet of static tracepoint definition. */
4032 getpkt (&rs
->buf
, 0);
4033 p
= rs
->buf
.data ();
4040 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4043 remote_target::get_ada_task_ptid (long lwp
, long thread
)
4045 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
4049 /* Restart the remote side; this is an extended protocol operation. */
4052 remote_target::extended_remote_restart ()
4054 struct remote_state
*rs
= get_remote_state ();
4056 /* Send the restart command; for reasons I don't understand the
4057 remote side really expects a number after the "R". */
4058 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "R%x", 0);
4061 remote_fileio_reset ();
4064 /* Clean up connection to a remote debugger. */
4067 remote_target::close ()
4069 /* Make sure we leave stdin registered in the event loop. */
4072 trace_reset_local_state ();
4077 remote_target::~remote_target ()
4079 struct remote_state
*rs
= get_remote_state ();
4081 /* Check for NULL because we may get here with a partially
4082 constructed target/connection. */
4083 if (rs
->remote_desc
== nullptr)
4086 serial_close (rs
->remote_desc
);
4088 /* We are destroying the remote target, so we should discard
4089 everything of this target. */
4090 discard_pending_stop_replies_in_queue ();
4092 if (rs
->remote_async_inferior_event_token
)
4093 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4095 delete rs
->notif_state
;
4098 /* Query the remote side for the text, data and bss offsets. */
4101 remote_target::get_offsets ()
4103 struct remote_state
*rs
= get_remote_state ();
4106 int lose
, num_segments
= 0, do_sections
, do_segments
;
4107 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4109 if (symfile_objfile
== NULL
)
4112 putpkt ("qOffsets");
4113 getpkt (&rs
->buf
, 0);
4114 buf
= rs
->buf
.data ();
4116 if (buf
[0] == '\000')
4117 return; /* Return silently. Stub doesn't support
4121 warning (_("Remote failure reply: %s"), buf
);
4125 /* Pick up each field in turn. This used to be done with scanf, but
4126 scanf will make trouble if CORE_ADDR size doesn't match
4127 conversion directives correctly. The following code will work
4128 with any size of CORE_ADDR. */
4129 text_addr
= data_addr
= bss_addr
= 0;
4133 if (startswith (ptr
, "Text="))
4136 /* Don't use strtol, could lose on big values. */
4137 while (*ptr
&& *ptr
!= ';')
4138 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4140 if (startswith (ptr
, ";Data="))
4143 while (*ptr
&& *ptr
!= ';')
4144 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4149 if (!lose
&& startswith (ptr
, ";Bss="))
4152 while (*ptr
&& *ptr
!= ';')
4153 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4155 if (bss_addr
!= data_addr
)
4156 warning (_("Target reported unsupported offsets: %s"), buf
);
4161 else if (startswith (ptr
, "TextSeg="))
4164 /* Don't use strtol, could lose on big values. */
4165 while (*ptr
&& *ptr
!= ';')
4166 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4169 if (startswith (ptr
, ";DataSeg="))
4172 while (*ptr
&& *ptr
!= ';')
4173 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4181 error (_("Malformed response to offset query, %s"), buf
);
4182 else if (*ptr
!= '\0')
4183 warning (_("Target reported unsupported offsets: %s"), buf
);
4185 section_offsets offs
= symfile_objfile
->section_offsets
;
4187 symfile_segment_data_up data
4188 = get_symfile_segment_data (symfile_objfile
->obfd
);
4189 do_segments
= (data
!= NULL
);
4190 do_sections
= num_segments
== 0;
4192 if (num_segments
> 0)
4194 segments
[0] = text_addr
;
4195 segments
[1] = data_addr
;
4197 /* If we have two segments, we can still try to relocate everything
4198 by assuming that the .text and .data offsets apply to the whole
4199 text and data segments. Convert the offsets given in the packet
4200 to base addresses for symfile_map_offsets_to_segments. */
4201 else if (data
!= nullptr && data
->segments
.size () == 2)
4203 segments
[0] = data
->segments
[0].base
+ text_addr
;
4204 segments
[1] = data
->segments
[1].base
+ data_addr
;
4207 /* If the object file has only one segment, assume that it is text
4208 rather than data; main programs with no writable data are rare,
4209 but programs with no code are useless. Of course the code might
4210 have ended up in the data segment... to detect that we would need
4211 the permissions here. */
4212 else if (data
&& data
->segments
.size () == 1)
4214 segments
[0] = data
->segments
[0].base
+ text_addr
;
4217 /* There's no way to relocate by segment. */
4223 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
,
4225 num_segments
, segments
);
4227 if (ret
== 0 && !do_sections
)
4228 error (_("Can not handle qOffsets TextSeg "
4229 "response with this symbol file"));
4237 offs
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
4239 /* This is a temporary kludge to force data and bss to use the
4240 same offsets because that's what nlmconv does now. The real
4241 solution requires changes to the stub and remote.c that I
4242 don't have time to do right now. */
4244 offs
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
4245 offs
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
4248 objfile_relocate (symfile_objfile
, offs
);
4251 /* Send interrupt_sequence to remote target. */
4254 remote_target::send_interrupt_sequence ()
4256 struct remote_state
*rs
= get_remote_state ();
4258 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4259 remote_serial_write ("\x03", 1);
4260 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4261 serial_send_break (rs
->remote_desc
);
4262 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4264 serial_send_break (rs
->remote_desc
);
4265 remote_serial_write ("g", 1);
4268 internal_error (__FILE__
, __LINE__
,
4269 _("Invalid value for interrupt_sequence_mode: %s."),
4270 interrupt_sequence_mode
);
4274 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4275 and extract the PTID. Returns NULL_PTID if not found. */
4278 stop_reply_extract_thread (char *stop_reply
)
4280 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4284 /* Txx r:val ; r:val (...) */
4287 /* Look for "register" named "thread". */
4292 p1
= strchr (p
, ':');
4296 if (strncmp (p
, "thread", p1
- p
) == 0)
4297 return read_ptid (++p1
, &p
);
4299 p1
= strchr (p
, ';');
4311 /* Determine the remote side's current thread. If we have a stop
4312 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4313 "thread" register we can extract the current thread from. If not,
4314 ask the remote which is the current thread with qC. The former
4315 method avoids a roundtrip. */
4318 remote_target::get_current_thread (char *wait_status
)
4320 ptid_t ptid
= null_ptid
;
4322 /* Note we don't use remote_parse_stop_reply as that makes use of
4323 the target architecture, which we haven't yet fully determined at
4325 if (wait_status
!= NULL
)
4326 ptid
= stop_reply_extract_thread (wait_status
);
4327 if (ptid
== null_ptid
)
4328 ptid
= remote_current_thread (inferior_ptid
);
4333 /* Query the remote target for which is the current thread/process,
4334 add it to our tables, and update INFERIOR_PTID. The caller is
4335 responsible for setting the state such that the remote end is ready
4336 to return the current thread.
4338 This function is called after handling the '?' or 'vRun' packets,
4339 whose response is a stop reply from which we can also try
4340 extracting the thread. If the target doesn't support the explicit
4341 qC query, we infer the current thread from that stop reply, passed
4342 in in WAIT_STATUS, which may be NULL. */
4345 remote_target::add_current_inferior_and_thread (char *wait_status
)
4347 struct remote_state
*rs
= get_remote_state ();
4348 bool fake_pid_p
= false;
4350 switch_to_no_thread ();
4352 /* Now, if we have thread information, update the current thread's
4354 ptid_t curr_ptid
= get_current_thread (wait_status
);
4356 if (curr_ptid
!= null_ptid
)
4358 if (!remote_multi_process_p (rs
))
4363 /* Without this, some commands which require an active target
4364 (such as kill) won't work. This variable serves (at least)
4365 double duty as both the pid of the target process (if it has
4366 such), and as a flag indicating that a target is active. */
4367 curr_ptid
= magic_null_ptid
;
4371 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4373 /* Add the main thread and switch to it. Don't try reading
4374 registers yet, since we haven't fetched the target description
4376 thread_info
*tp
= add_thread_silent (this, curr_ptid
);
4377 switch_to_thread_no_regs (tp
);
4380 /* Print info about a thread that was found already stopped on
4384 print_one_stopped_thread (struct thread_info
*thread
)
4386 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
4388 switch_to_thread (thread
);
4389 thread
->suspend
.stop_pc
= get_frame_pc (get_current_frame ());
4390 set_current_sal_from_frame (get_current_frame ());
4392 thread
->suspend
.waitstatus_pending_p
= 0;
4394 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
4396 enum gdb_signal sig
= ws
->value
.sig
;
4398 if (signal_print_state (sig
))
4399 gdb::observers::signal_received
.notify (sig
);
4401 gdb::observers::normal_stop
.notify (NULL
, 1);
4404 /* Process all initial stop replies the remote side sent in response
4405 to the ? packet. These indicate threads that were already stopped
4406 on initial connection. We mark these threads as stopped and print
4407 their current frame before giving the user the prompt. */
4410 remote_target::process_initial_stop_replies (int from_tty
)
4412 int pending_stop_replies
= stop_reply_queue_length ();
4413 struct thread_info
*selected
= NULL
;
4414 struct thread_info
*lowest_stopped
= NULL
;
4415 struct thread_info
*first
= NULL
;
4417 /* Consume the initial pending events. */
4418 while (pending_stop_replies
-- > 0)
4420 ptid_t waiton_ptid
= minus_one_ptid
;
4422 struct target_waitstatus ws
;
4423 int ignore_event
= 0;
4425 memset (&ws
, 0, sizeof (ws
));
4426 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4428 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4432 case TARGET_WAITKIND_IGNORE
:
4433 case TARGET_WAITKIND_NO_RESUMED
:
4434 case TARGET_WAITKIND_SIGNALLED
:
4435 case TARGET_WAITKIND_EXITED
:
4436 /* We shouldn't see these, but if we do, just ignore. */
4438 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
4442 case TARGET_WAITKIND_EXECD
:
4443 xfree (ws
.value
.execd_pathname
);
4452 thread_info
*evthread
= find_thread_ptid (this, event_ptid
);
4454 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4456 enum gdb_signal sig
= ws
.value
.sig
;
4458 /* Stubs traditionally report SIGTRAP as initial signal,
4459 instead of signal 0. Suppress it. */
4460 if (sig
== GDB_SIGNAL_TRAP
)
4462 evthread
->suspend
.stop_signal
= sig
;
4466 evthread
->suspend
.waitstatus
= ws
;
4468 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4469 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4470 evthread
->suspend
.waitstatus_pending_p
= 1;
4472 set_executing (this, event_ptid
, false);
4473 set_running (this, event_ptid
, false);
4474 get_remote_thread_info (evthread
)->vcont_resumed
= 0;
4477 /* "Notice" the new inferiors before anything related to
4478 registers/memory. */
4479 for (inferior
*inf
: all_non_exited_inferiors (this))
4481 inf
->needs_setup
= 1;
4485 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4486 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4491 /* If all-stop on top of non-stop, pause all threads. Note this
4492 records the threads' stop pc, so must be done after "noticing"
4496 stop_all_threads ();
4498 /* If all threads of an inferior were already stopped, we
4499 haven't setup the inferior yet. */
4500 for (inferior
*inf
: all_non_exited_inferiors (this))
4502 if (inf
->needs_setup
)
4504 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4505 switch_to_thread_no_regs (thread
);
4511 /* Now go over all threads that are stopped, and print their current
4512 frame. If all-stop, then if there's a signalled thread, pick
4514 for (thread_info
*thread
: all_non_exited_threads (this))
4520 thread
->set_running (false);
4521 else if (thread
->state
!= THREAD_STOPPED
)
4524 if (selected
== NULL
4525 && thread
->suspend
.waitstatus_pending_p
)
4528 if (lowest_stopped
== NULL
4529 || thread
->inf
->num
< lowest_stopped
->inf
->num
4530 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4531 lowest_stopped
= thread
;
4534 print_one_stopped_thread (thread
);
4537 /* In all-stop, we only print the status of one thread, and leave
4538 others with their status pending. */
4541 thread_info
*thread
= selected
;
4543 thread
= lowest_stopped
;
4547 print_one_stopped_thread (thread
);
4550 /* For "info program". */
4551 thread_info
*thread
= inferior_thread ();
4552 if (thread
->state
== THREAD_STOPPED
)
4553 set_last_target_status (this, inferior_ptid
, thread
->suspend
.waitstatus
);
4556 /* Start the remote connection and sync state. */
4559 remote_target::start_remote (int from_tty
, int extended_p
)
4561 struct remote_state
*rs
= get_remote_state ();
4562 struct packet_config
*noack_config
;
4563 char *wait_status
= NULL
;
4565 /* Signal other parts that we're going through the initial setup,
4566 and so things may not be stable yet. E.g., we don't try to
4567 install tracepoints until we've relocated symbols. Also, a
4568 Ctrl-C before we're connected and synced up can't interrupt the
4569 target. Instead, it offers to drop the (potentially wedged)
4571 rs
->starting_up
= 1;
4575 if (interrupt_on_connect
)
4576 send_interrupt_sequence ();
4578 /* Ack any packet which the remote side has already sent. */
4579 remote_serial_write ("+", 1);
4581 /* The first packet we send to the target is the optional "supported
4582 packets" request. If the target can answer this, it will tell us
4583 which later probes to skip. */
4584 remote_query_supported ();
4586 /* If the stub wants to get a QAllow, compose one and send it. */
4587 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4590 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4591 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4592 as a reply to known packet. For packet "vFile:setfs:" it is an
4593 invalid reply and GDB would return error in
4594 remote_hostio_set_filesystem, making remote files access impossible.
4595 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4596 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4598 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4600 putpkt (v_mustreplyempty
);
4601 getpkt (&rs
->buf
, 0);
4602 if (strcmp (rs
->buf
.data (), "OK") == 0)
4603 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4604 else if (strcmp (rs
->buf
.data (), "") != 0)
4605 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4609 /* Next, we possibly activate noack mode.
4611 If the QStartNoAckMode packet configuration is set to AUTO,
4612 enable noack mode if the stub reported a wish for it with
4615 If set to TRUE, then enable noack mode even if the stub didn't
4616 report it in qSupported. If the stub doesn't reply OK, the
4617 session ends with an error.
4619 If FALSE, then don't activate noack mode, regardless of what the
4620 stub claimed should be the default with qSupported. */
4622 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4623 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4625 putpkt ("QStartNoAckMode");
4626 getpkt (&rs
->buf
, 0);
4627 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4633 /* Tell the remote that we are using the extended protocol. */
4635 getpkt (&rs
->buf
, 0);
4638 /* Let the target know which signals it is allowed to pass down to
4640 update_signals_program_target ();
4642 /* Next, if the target can specify a description, read it. We do
4643 this before anything involving memory or registers. */
4644 target_find_description ();
4646 /* Next, now that we know something about the target, update the
4647 address spaces in the program spaces. */
4648 update_address_spaces ();
4650 /* On OSs where the list of libraries is global to all
4651 processes, we fetch them early. */
4652 if (gdbarch_has_global_solist (target_gdbarch ()))
4653 solib_add (NULL
, from_tty
, auto_solib_add
);
4655 if (target_is_non_stop_p ())
4657 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4658 error (_("Non-stop mode requested, but remote "
4659 "does not support non-stop"));
4661 putpkt ("QNonStop:1");
4662 getpkt (&rs
->buf
, 0);
4664 if (strcmp (rs
->buf
.data (), "OK") != 0)
4665 error (_("Remote refused setting non-stop mode with: %s"),
4668 /* Find about threads and processes the stub is already
4669 controlling. We default to adding them in the running state.
4670 The '?' query below will then tell us about which threads are
4672 this->update_thread_list ();
4674 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4676 /* Don't assume that the stub can operate in all-stop mode.
4677 Request it explicitly. */
4678 putpkt ("QNonStop:0");
4679 getpkt (&rs
->buf
, 0);
4681 if (strcmp (rs
->buf
.data (), "OK") != 0)
4682 error (_("Remote refused setting all-stop mode with: %s"),
4686 /* Upload TSVs regardless of whether the target is running or not. The
4687 remote stub, such as GDBserver, may have some predefined or builtin
4688 TSVs, even if the target is not running. */
4689 if (get_trace_status (current_trace_status ()) != -1)
4691 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4693 upload_trace_state_variables (&uploaded_tsvs
);
4694 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4697 /* Check whether the target is running now. */
4699 getpkt (&rs
->buf
, 0);
4701 if (!target_is_non_stop_p ())
4703 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4706 error (_("The target is not running (try extended-remote?)"));
4708 /* We're connected, but not running. Drop out before we
4709 call start_remote. */
4710 rs
->starting_up
= 0;
4715 /* Save the reply for later. */
4716 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4717 strcpy (wait_status
, rs
->buf
.data ());
4720 /* Fetch thread list. */
4721 target_update_thread_list ();
4723 /* Let the stub know that we want it to return the thread. */
4724 set_continue_thread (minus_one_ptid
);
4726 if (thread_count (this) == 0)
4728 /* Target has no concept of threads at all. GDB treats
4729 non-threaded target as single-threaded; add a main
4731 add_current_inferior_and_thread (wait_status
);
4735 /* We have thread information; select the thread the target
4736 says should be current. If we're reconnecting to a
4737 multi-threaded program, this will ideally be the thread
4738 that last reported an event before GDB disconnected. */
4739 ptid_t curr_thread
= get_current_thread (wait_status
);
4740 if (curr_thread
== null_ptid
)
4742 /* Odd... The target was able to list threads, but not
4743 tell us which thread was current (no "thread"
4744 register in T stop reply?). Just pick the first
4745 thread in the thread list then. */
4748 fprintf_unfiltered (gdb_stdlog
,
4749 "warning: couldn't determine remote "
4750 "current thread; picking first in list.\n");
4752 for (thread_info
*tp
: all_non_exited_threads (this,
4755 switch_to_thread (tp
);
4760 switch_to_thread (find_thread_ptid (this, curr_thread
));
4763 /* init_wait_for_inferior should be called before get_offsets in order
4764 to manage `inserted' flag in bp loc in a correct state.
4765 breakpoint_init_inferior, called from init_wait_for_inferior, set
4766 `inserted' flag to 0, while before breakpoint_re_set, called from
4767 start_remote, set `inserted' flag to 1. In the initialization of
4768 inferior, breakpoint_init_inferior should be called first, and then
4769 breakpoint_re_set can be called. If this order is broken, state of
4770 `inserted' flag is wrong, and cause some problems on breakpoint
4772 init_wait_for_inferior ();
4774 get_offsets (); /* Get text, data & bss offsets. */
4776 /* If we could not find a description using qXfer, and we know
4777 how to do it some other way, try again. This is not
4778 supported for non-stop; it could be, but it is tricky if
4779 there are no stopped threads when we connect. */
4780 if (remote_read_description_p (this)
4781 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4783 target_clear_description ();
4784 target_find_description ();
4787 /* Use the previously fetched status. */
4788 gdb_assert (wait_status
!= NULL
);
4789 strcpy (rs
->buf
.data (), wait_status
);
4790 rs
->cached_wait_status
= 1;
4792 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4796 /* Clear WFI global state. Do this before finding about new
4797 threads and inferiors, and setting the current inferior.
4798 Otherwise we would clear the proceed status of the current
4799 inferior when we want its stop_soon state to be preserved
4800 (see notice_new_inferior). */
4801 init_wait_for_inferior ();
4803 /* In non-stop, we will either get an "OK", meaning that there
4804 are no stopped threads at this time; or, a regular stop
4805 reply. In the latter case, there may be more than one thread
4806 stopped --- we pull them all out using the vStopped
4808 if (strcmp (rs
->buf
.data (), "OK") != 0)
4810 struct notif_client
*notif
= ¬if_client_stop
;
4812 /* remote_notif_get_pending_replies acks this one, and gets
4814 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4815 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4816 remote_notif_get_pending_events (notif
);
4819 if (thread_count (this) == 0)
4822 error (_("The target is not running (try extended-remote?)"));
4824 /* We're connected, but not running. Drop out before we
4825 call start_remote. */
4826 rs
->starting_up
= 0;
4830 /* In non-stop mode, any cached wait status will be stored in
4831 the stop reply queue. */
4832 gdb_assert (wait_status
== NULL
);
4834 /* Report all signals during attach/startup. */
4837 /* If there are already stopped threads, mark them stopped and
4838 report their stops before giving the prompt to the user. */
4839 process_initial_stop_replies (from_tty
);
4841 if (target_can_async_p ())
4845 /* If we connected to a live target, do some additional setup. */
4846 if (target_has_execution
)
4848 if (symfile_objfile
) /* No use without a symbol-file. */
4849 remote_check_symbols ();
4852 /* Possibly the target has been engaged in a trace run started
4853 previously; find out where things are at. */
4854 if (get_trace_status (current_trace_status ()) != -1)
4856 struct uploaded_tp
*uploaded_tps
= NULL
;
4858 if (current_trace_status ()->running
)
4859 printf_filtered (_("Trace is already running on the target.\n"));
4861 upload_tracepoints (&uploaded_tps
);
4863 merge_uploaded_tracepoints (&uploaded_tps
);
4866 /* Possibly the target has been engaged in a btrace record started
4867 previously; find out where things are at. */
4868 remote_btrace_maybe_reopen ();
4870 /* The thread and inferior lists are now synchronized with the
4871 target, our symbols have been relocated, and we're merged the
4872 target's tracepoints with ours. We're done with basic start
4874 rs
->starting_up
= 0;
4876 /* Maybe breakpoints are global and need to be inserted now. */
4877 if (breakpoints_should_be_inserted_now ())
4878 insert_breakpoints ();
4882 remote_target::connection_string ()
4884 remote_state
*rs
= get_remote_state ();
4886 if (rs
->remote_desc
->name
!= NULL
)
4887 return rs
->remote_desc
->name
;
4892 /* Open a connection to a remote debugger.
4893 NAME is the filename used for communication. */
4896 remote_target::open (const char *name
, int from_tty
)
4898 open_1 (name
, from_tty
, 0);
4901 /* Open a connection to a remote debugger using the extended
4902 remote gdb protocol. NAME is the filename used for communication. */
4905 extended_remote_target::open (const char *name
, int from_tty
)
4907 open_1 (name
, from_tty
, 1 /*extended_p */);
4910 /* Reset all packets back to "unknown support". Called when opening a
4911 new connection to a remote target. */
4914 reset_all_packet_configs_support (void)
4918 for (i
= 0; i
< PACKET_MAX
; i
++)
4919 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4922 /* Initialize all packet configs. */
4925 init_all_packet_configs (void)
4929 for (i
= 0; i
< PACKET_MAX
; i
++)
4931 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4932 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4936 /* Symbol look-up. */
4939 remote_target::remote_check_symbols ()
4944 /* The remote side has no concept of inferiors that aren't running
4945 yet, it only knows about running processes. If we're connected
4946 but our current inferior is not running, we should not invite the
4947 remote target to request symbol lookups related to its
4948 (unrelated) current process. */
4949 if (!target_has_execution
)
4952 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4955 /* Make sure the remote is pointing at the right process. Note
4956 there's no way to select "no process". */
4957 set_general_process ();
4959 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4960 because we need both at the same time. */
4961 gdb::char_vector
msg (get_remote_packet_size ());
4962 gdb::char_vector
reply (get_remote_packet_size ());
4964 /* Invite target to request symbol lookups. */
4966 putpkt ("qSymbol::");
4968 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4970 while (startswith (reply
.data (), "qSymbol:"))
4972 struct bound_minimal_symbol sym
;
4975 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
4978 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
4979 if (sym
.minsym
== NULL
)
4980 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
4984 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4985 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4987 /* If this is a function address, return the start of code
4988 instead of any data function descriptor. */
4989 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4991 current_top_target ());
4993 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
4994 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4997 putpkt (msg
.data ());
5002 static struct serial
*
5003 remote_serial_open (const char *name
)
5005 static int udp_warning
= 0;
5007 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
5008 of in ser-tcp.c, because it is the remote protocol assuming that the
5009 serial connection is reliable and not the serial connection promising
5011 if (!udp_warning
&& startswith (name
, "udp:"))
5013 warning (_("The remote protocol may be unreliable over UDP.\n"
5014 "Some events may be lost, rendering further debugging "
5019 return serial_open (name
);
5022 /* Inform the target of our permission settings. The permission flags
5023 work without this, but if the target knows the settings, it can do
5024 a couple things. First, it can add its own check, to catch cases
5025 that somehow manage to get by the permissions checks in target
5026 methods. Second, if the target is wired to disallow particular
5027 settings (for instance, a system in the field that is not set up to
5028 be able to stop at a breakpoint), it can object to any unavailable
5032 remote_target::set_permissions ()
5034 struct remote_state
*rs
= get_remote_state ();
5036 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
5037 "WriteReg:%x;WriteMem:%x;"
5038 "InsertBreak:%x;InsertTrace:%x;"
5039 "InsertFastTrace:%x;Stop:%x",
5040 may_write_registers
, may_write_memory
,
5041 may_insert_breakpoints
, may_insert_tracepoints
,
5042 may_insert_fast_tracepoints
, may_stop
);
5044 getpkt (&rs
->buf
, 0);
5046 /* If the target didn't like the packet, warn the user. Do not try
5047 to undo the user's settings, that would just be maddening. */
5048 if (strcmp (rs
->buf
.data (), "OK") != 0)
5049 warning (_("Remote refused setting permissions with: %s"),
5053 /* This type describes each known response to the qSupported
5055 struct protocol_feature
5057 /* The name of this protocol feature. */
5060 /* The default for this protocol feature. */
5061 enum packet_support default_support
;
5063 /* The function to call when this feature is reported, or after
5064 qSupported processing if the feature is not supported.
5065 The first argument points to this structure. The second
5066 argument indicates whether the packet requested support be
5067 enabled, disabled, or probed (or the default, if this function
5068 is being called at the end of processing and this feature was
5069 not reported). The third argument may be NULL; if not NULL, it
5070 is a NUL-terminated string taken from the packet following
5071 this feature's name and an equals sign. */
5072 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5073 enum packet_support
, const char *);
5075 /* The corresponding packet for this feature. Only used if
5076 FUNC is remote_supported_packet. */
5081 remote_supported_packet (remote_target
*remote
,
5082 const struct protocol_feature
*feature
,
5083 enum packet_support support
,
5084 const char *argument
)
5088 warning (_("Remote qSupported response supplied an unexpected value for"
5089 " \"%s\"."), feature
->name
);
5093 remote_protocol_packets
[feature
->packet
].support
= support
;
5097 remote_target::remote_packet_size (const protocol_feature
*feature
,
5098 enum packet_support support
, const char *value
)
5100 struct remote_state
*rs
= get_remote_state ();
5105 if (support
!= PACKET_ENABLE
)
5108 if (value
== NULL
|| *value
== '\0')
5110 warning (_("Remote target reported \"%s\" without a size."),
5116 packet_size
= strtol (value
, &value_end
, 16);
5117 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5119 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5120 feature
->name
, value
);
5124 /* Record the new maximum packet size. */
5125 rs
->explicit_packet_size
= packet_size
;
5129 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5130 enum packet_support support
, const char *value
)
5132 remote
->remote_packet_size (feature
, support
, value
);
5135 static const struct protocol_feature remote_protocol_features
[] = {
5136 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5137 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5138 PACKET_qXfer_auxv
},
5139 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5140 PACKET_qXfer_exec_file
},
5141 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5142 PACKET_qXfer_features
},
5143 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5144 PACKET_qXfer_libraries
},
5145 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5146 PACKET_qXfer_libraries_svr4
},
5147 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5148 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5149 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5150 PACKET_qXfer_memory_map
},
5151 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5152 PACKET_qXfer_osdata
},
5153 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5154 PACKET_qXfer_threads
},
5155 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5156 PACKET_qXfer_traceframe_info
},
5157 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5158 PACKET_QPassSignals
},
5159 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5160 PACKET_QCatchSyscalls
},
5161 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5162 PACKET_QProgramSignals
},
5163 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5164 PACKET_QSetWorkingDir
},
5165 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5166 PACKET_QStartupWithShell
},
5167 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5168 PACKET_QEnvironmentHexEncoded
},
5169 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5170 PACKET_QEnvironmentReset
},
5171 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5172 PACKET_QEnvironmentUnset
},
5173 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5174 PACKET_QStartNoAckMode
},
5175 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5176 PACKET_multiprocess_feature
},
5177 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5178 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5179 PACKET_qXfer_siginfo_read
},
5180 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5181 PACKET_qXfer_siginfo_write
},
5182 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5183 PACKET_ConditionalTracepoints
},
5184 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5185 PACKET_ConditionalBreakpoints
},
5186 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5187 PACKET_BreakpointCommands
},
5188 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5189 PACKET_FastTracepoints
},
5190 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5191 PACKET_StaticTracepoints
},
5192 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5193 PACKET_InstallInTrace
},
5194 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5195 PACKET_DisconnectedTracing_feature
},
5196 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5198 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5200 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5201 PACKET_TracepointSource
},
5202 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5204 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5205 PACKET_EnableDisableTracepoints_feature
},
5206 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5207 PACKET_qXfer_fdpic
},
5208 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5210 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5211 PACKET_QDisableRandomization
},
5212 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5213 { "QTBuffer:size", PACKET_DISABLE
,
5214 remote_supported_packet
, PACKET_QTBuffer_size
},
5215 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5216 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5217 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5218 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5219 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5220 PACKET_qXfer_btrace
},
5221 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5222 PACKET_qXfer_btrace_conf
},
5223 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5224 PACKET_Qbtrace_conf_bts_size
},
5225 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5226 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5227 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5228 PACKET_fork_event_feature
},
5229 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5230 PACKET_vfork_event_feature
},
5231 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5232 PACKET_exec_event_feature
},
5233 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5234 PACKET_Qbtrace_conf_pt_size
},
5235 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5236 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5237 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5240 static char *remote_support_xml
;
5242 /* Register string appended to "xmlRegisters=" in qSupported query. */
5245 register_remote_support_xml (const char *xml
)
5247 #if defined(HAVE_LIBEXPAT)
5248 if (remote_support_xml
== NULL
)
5249 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5252 char *copy
= xstrdup (remote_support_xml
+ 13);
5254 char *p
= strtok_r (copy
, ",", &saveptr
);
5258 if (strcmp (p
, xml
) == 0)
5265 while ((p
= strtok_r (NULL
, ",", &saveptr
)) != NULL
);
5268 remote_support_xml
= reconcat (remote_support_xml
,
5269 remote_support_xml
, ",", xml
,
5276 remote_query_supported_append (std::string
*msg
, const char *append
)
5280 msg
->append (append
);
5284 remote_target::remote_query_supported ()
5286 struct remote_state
*rs
= get_remote_state ();
5289 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5291 /* The packet support flags are handled differently for this packet
5292 than for most others. We treat an error, a disabled packet, and
5293 an empty response identically: any features which must be reported
5294 to be used will be automatically disabled. An empty buffer
5295 accomplishes this, since that is also the representation for a list
5296 containing no features. */
5299 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5303 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5304 remote_query_supported_append (&q
, "multiprocess+");
5306 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5307 remote_query_supported_append (&q
, "swbreak+");
5308 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5309 remote_query_supported_append (&q
, "hwbreak+");
5311 remote_query_supported_append (&q
, "qRelocInsn+");
5313 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5314 != AUTO_BOOLEAN_FALSE
)
5315 remote_query_supported_append (&q
, "fork-events+");
5316 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5317 != AUTO_BOOLEAN_FALSE
)
5318 remote_query_supported_append (&q
, "vfork-events+");
5319 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5320 != AUTO_BOOLEAN_FALSE
)
5321 remote_query_supported_append (&q
, "exec-events+");
5323 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5324 remote_query_supported_append (&q
, "vContSupported+");
5326 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5327 remote_query_supported_append (&q
, "QThreadEvents+");
5329 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5330 remote_query_supported_append (&q
, "no-resumed+");
5332 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5333 the qSupported:xmlRegisters=i386 handling. */
5334 if (remote_support_xml
!= NULL
5335 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5336 remote_query_supported_append (&q
, remote_support_xml
);
5338 q
= "qSupported:" + q
;
5339 putpkt (q
.c_str ());
5341 getpkt (&rs
->buf
, 0);
5343 /* If an error occured, warn, but do not return - just reset the
5344 buffer to empty and go on to disable features. */
5345 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5348 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5353 memset (seen
, 0, sizeof (seen
));
5355 next
= rs
->buf
.data ();
5358 enum packet_support is_supported
;
5359 char *p
, *end
, *name_end
, *value
;
5361 /* First separate out this item from the rest of the packet. If
5362 there's another item after this, we overwrite the separator
5363 (terminated strings are much easier to work with). */
5365 end
= strchr (p
, ';');
5368 end
= p
+ strlen (p
);
5378 warning (_("empty item in \"qSupported\" response"));
5383 name_end
= strchr (p
, '=');
5386 /* This is a name=value entry. */
5387 is_supported
= PACKET_ENABLE
;
5388 value
= name_end
+ 1;
5397 is_supported
= PACKET_ENABLE
;
5401 is_supported
= PACKET_DISABLE
;
5405 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5409 warning (_("unrecognized item \"%s\" "
5410 "in \"qSupported\" response"), p
);
5416 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5417 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5419 const struct protocol_feature
*feature
;
5422 feature
= &remote_protocol_features
[i
];
5423 feature
->func (this, feature
, is_supported
, value
);
5428 /* If we increased the packet size, make sure to increase the global
5429 buffer size also. We delay this until after parsing the entire
5430 qSupported packet, because this is the same buffer we were
5432 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5433 rs
->buf
.resize (rs
->explicit_packet_size
);
5435 /* Handle the defaults for unmentioned features. */
5436 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5439 const struct protocol_feature
*feature
;
5441 feature
= &remote_protocol_features
[i
];
5442 feature
->func (this, feature
, feature
->default_support
, NULL
);
5446 /* Serial QUIT handler for the remote serial descriptor.
5448 Defers handling a Ctrl-C until we're done with the current
5449 command/response packet sequence, unless:
5451 - We're setting up the connection. Don't send a remote interrupt
5452 request, as we're not fully synced yet. Quit immediately
5455 - The target has been resumed in the foreground
5456 (target_terminal::is_ours is false) with a synchronous resume
5457 packet, and we're blocked waiting for the stop reply, thus a
5458 Ctrl-C should be immediately sent to the target.
5460 - We get a second Ctrl-C while still within the same serial read or
5461 write. In that case the serial is seemingly wedged --- offer to
5464 - We see a second Ctrl-C without target response, after having
5465 previously interrupted the target. In that case the target/stub
5466 is probably wedged --- offer to quit/disconnect.
5470 remote_target::remote_serial_quit_handler ()
5472 struct remote_state
*rs
= get_remote_state ();
5474 if (check_quit_flag ())
5476 /* If we're starting up, we're not fully synced yet. Quit
5478 if (rs
->starting_up
)
5480 else if (rs
->got_ctrlc_during_io
)
5482 if (query (_("The target is not responding to GDB commands.\n"
5483 "Stop debugging it? ")))
5484 remote_unpush_and_throw (this);
5486 /* If ^C has already been sent once, offer to disconnect. */
5487 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5489 /* All-stop protocol, and blocked waiting for stop reply. Send
5490 an interrupt request. */
5491 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5492 target_interrupt ();
5494 rs
->got_ctrlc_during_io
= 1;
5498 /* The remote_target that is current while the quit handler is
5499 overridden with remote_serial_quit_handler. */
5500 static remote_target
*curr_quit_handler_target
;
5503 remote_serial_quit_handler ()
5505 curr_quit_handler_target
->remote_serial_quit_handler ();
5508 /* Remove the remote target from the target stack of each inferior
5509 that is using it. Upper targets depend on it so remove them
5513 remote_unpush_target (remote_target
*target
)
5515 /* We have to unpush the target from all inferiors, even those that
5517 scoped_restore_current_inferior restore_current_inferior
;
5519 for (inferior
*inf
: all_inferiors (target
))
5521 switch_to_inferior_no_thread (inf
);
5522 pop_all_targets_at_and_above (process_stratum
);
5523 generic_mourn_inferior ();
5528 remote_unpush_and_throw (remote_target
*target
)
5530 remote_unpush_target (target
);
5531 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5535 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5537 remote_target
*curr_remote
= get_current_remote_target ();
5540 error (_("To open a remote debug connection, you need to specify what\n"
5541 "serial device is attached to the remote system\n"
5542 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5544 /* If we're connected to a running target, target_preopen will kill it.
5545 Ask this question first, before target_preopen has a chance to kill
5547 if (curr_remote
!= NULL
&& !target_has_execution
)
5550 && !query (_("Already connected to a remote target. Disconnect? ")))
5551 error (_("Still connected."));
5554 /* Here the possibly existing remote target gets unpushed. */
5555 target_preopen (from_tty
);
5557 remote_fileio_reset ();
5558 reopen_exec_file ();
5561 remote_target
*remote
5562 = (extended_p
? new extended_remote_target () : new remote_target ());
5563 target_ops_up
target_holder (remote
);
5565 remote_state
*rs
= remote
->get_remote_state ();
5567 /* See FIXME above. */
5568 if (!target_async_permitted
)
5569 rs
->wait_forever_enabled_p
= 1;
5571 rs
->remote_desc
= remote_serial_open (name
);
5572 if (!rs
->remote_desc
)
5573 perror_with_name (name
);
5575 if (baud_rate
!= -1)
5577 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5579 /* The requested speed could not be set. Error out to
5580 top level after closing remote_desc. Take care to
5581 set remote_desc to NULL to avoid closing remote_desc
5583 serial_close (rs
->remote_desc
);
5584 rs
->remote_desc
= NULL
;
5585 perror_with_name (name
);
5589 serial_setparity (rs
->remote_desc
, serial_parity
);
5590 serial_raw (rs
->remote_desc
);
5592 /* If there is something sitting in the buffer we might take it as a
5593 response to a command, which would be bad. */
5594 serial_flush_input (rs
->remote_desc
);
5598 puts_filtered ("Remote debugging using ");
5599 puts_filtered (name
);
5600 puts_filtered ("\n");
5603 /* Switch to using the remote target now. */
5604 push_target (std::move (target_holder
));
5606 /* Register extra event sources in the event loop. */
5607 rs
->remote_async_inferior_event_token
5608 = create_async_event_handler (remote_async_inferior_event_handler
, remote
);
5609 rs
->notif_state
= remote_notif_state_allocate (remote
);
5611 /* Reset the target state; these things will be queried either by
5612 remote_query_supported or as they are needed. */
5613 reset_all_packet_configs_support ();
5614 rs
->cached_wait_status
= 0;
5615 rs
->explicit_packet_size
= 0;
5617 rs
->extended
= extended_p
;
5618 rs
->waiting_for_stop_reply
= 0;
5619 rs
->ctrlc_pending_p
= 0;
5620 rs
->got_ctrlc_during_io
= 0;
5622 rs
->general_thread
= not_sent_ptid
;
5623 rs
->continue_thread
= not_sent_ptid
;
5624 rs
->remote_traceframe_number
= -1;
5626 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5628 /* Probe for ability to use "ThreadInfo" query, as required. */
5629 rs
->use_threadinfo_query
= 1;
5630 rs
->use_threadextra_query
= 1;
5632 rs
->readahead_cache
.invalidate ();
5634 if (target_async_permitted
)
5636 /* FIXME: cagney/1999-09-23: During the initial connection it is
5637 assumed that the target is already ready and able to respond to
5638 requests. Unfortunately remote_start_remote() eventually calls
5639 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5640 around this. Eventually a mechanism that allows
5641 wait_for_inferior() to expect/get timeouts will be
5643 rs
->wait_forever_enabled_p
= 0;
5646 /* First delete any symbols previously loaded from shared libraries. */
5647 no_shared_libraries (NULL
, 0);
5649 /* Start the remote connection. If error() or QUIT, discard this
5650 target (we'd otherwise be in an inconsistent state) and then
5651 propogate the error on up the exception chain. This ensures that
5652 the caller doesn't stumble along blindly assuming that the
5653 function succeeded. The CLI doesn't have this problem but other
5654 UI's, such as MI do.
5656 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5657 this function should return an error indication letting the
5658 caller restore the previous state. Unfortunately the command
5659 ``target remote'' is directly wired to this function making that
5660 impossible. On a positive note, the CLI side of this problem has
5661 been fixed - the function set_cmd_context() makes it possible for
5662 all the ``target ....'' commands to share a common callback
5663 function. See cli-dump.c. */
5668 remote
->start_remote (from_tty
, extended_p
);
5670 catch (const gdb_exception
&ex
)
5672 /* Pop the partially set up target - unless something else did
5673 already before throwing the exception. */
5674 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5675 remote_unpush_target (remote
);
5680 remote_btrace_reset (rs
);
5682 if (target_async_permitted
)
5683 rs
->wait_forever_enabled_p
= 1;
5686 /* Detach the specified process. */
5689 remote_target::remote_detach_pid (int pid
)
5691 struct remote_state
*rs
= get_remote_state ();
5693 /* This should not be necessary, but the handling for D;PID in
5694 GDBserver versions prior to 8.2 incorrectly assumes that the
5695 selected process points to the same process we're detaching,
5696 leading to misbehavior (and possibly GDBserver crashing) when it
5697 does not. Since it's easy and cheap, work around it by forcing
5698 GDBserver to select GDB's current process. */
5699 set_general_process ();
5701 if (remote_multi_process_p (rs
))
5702 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5704 strcpy (rs
->buf
.data (), "D");
5707 getpkt (&rs
->buf
, 0);
5709 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5711 else if (rs
->buf
[0] == '\0')
5712 error (_("Remote doesn't know how to detach"));
5714 error (_("Can't detach process."));
5717 /* This detaches a program to which we previously attached, using
5718 inferior_ptid to identify the process. After this is done, GDB
5719 can be used to debug some other program. We better not have left
5720 any breakpoints in the target program or it'll die when it hits
5724 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5726 int pid
= inferior_ptid
.pid ();
5727 struct remote_state
*rs
= get_remote_state ();
5730 if (!target_has_execution
)
5731 error (_("No process to detach from."));
5733 target_announce_detach (from_tty
);
5735 /* Tell the remote target to detach. */
5736 remote_detach_pid (pid
);
5738 /* Exit only if this is the only active inferior. */
5739 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors (this) == 1)
5740 puts_filtered (_("Ending remote debugging.\n"));
5742 thread_info
*tp
= find_thread_ptid (this, inferior_ptid
);
5744 /* Check to see if we are detaching a fork parent. Note that if we
5745 are detaching a fork child, tp == NULL. */
5746 is_fork_parent
= (tp
!= NULL
5747 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5749 /* If doing detach-on-fork, we don't mourn, because that will delete
5750 breakpoints that should be available for the followed inferior. */
5751 if (!is_fork_parent
)
5753 /* Save the pid as a string before mourning, since that will
5754 unpush the remote target, and we need the string after. */
5755 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5757 target_mourn_inferior (inferior_ptid
);
5758 if (print_inferior_events
)
5759 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5760 inf
->num
, infpid
.c_str ());
5764 switch_to_no_thread ();
5765 detach_inferior (current_inferior ());
5770 remote_target::detach (inferior
*inf
, int from_tty
)
5772 remote_detach_1 (inf
, from_tty
);
5776 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5778 remote_detach_1 (inf
, from_tty
);
5781 /* Target follow-fork function for remote targets. On entry, and
5782 at return, the current inferior is the fork parent.
5784 Note that although this is currently only used for extended-remote,
5785 it is named remote_follow_fork in anticipation of using it for the
5786 remote target as well. */
5789 remote_target::follow_fork (bool follow_child
, bool detach_fork
)
5791 struct remote_state
*rs
= get_remote_state ();
5792 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5794 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5795 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5797 /* When following the parent and detaching the child, we detach
5798 the child here. For the case of following the child and
5799 detaching the parent, the detach is done in the target-
5800 independent follow fork code in infrun.c. We can't use
5801 target_detach when detaching an unfollowed child because
5802 the client side doesn't know anything about the child. */
5803 if (detach_fork
&& !follow_child
)
5805 /* Detach the fork child. */
5809 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5810 child_pid
= child_ptid
.pid ();
5812 remote_detach_pid (child_pid
);
5819 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5820 in the program space of the new inferior. On entry and at return the
5821 current inferior is the exec'ing inferior. INF is the new exec'd
5822 inferior, which may be the same as the exec'ing inferior unless
5823 follow-exec-mode is "new". */
5826 remote_target::follow_exec (struct inferior
*inf
, const char *execd_pathname
)
5828 /* We know that this is a target file name, so if it has the "target:"
5829 prefix we strip it off before saving it in the program space. */
5830 if (is_target_filename (execd_pathname
))
5831 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5833 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5836 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5839 remote_target::disconnect (const char *args
, int from_tty
)
5842 error (_("Argument given to \"disconnect\" when remotely debugging."));
5844 /* Make sure we unpush even the extended remote targets. Calling
5845 target_mourn_inferior won't unpush, and
5846 remote_target::mourn_inferior won't unpush if there is more than
5847 one inferior left. */
5848 remote_unpush_target (this);
5851 puts_filtered ("Ending remote debugging.\n");
5854 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5855 be chatty about it. */
5858 extended_remote_target::attach (const char *args
, int from_tty
)
5860 struct remote_state
*rs
= get_remote_state ();
5862 char *wait_status
= NULL
;
5864 pid
= parse_pid_to_attach (args
);
5866 /* Remote PID can be freely equal to getpid, do not check it here the same
5867 way as in other targets. */
5869 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5870 error (_("This target does not support attaching to a process"));
5874 const char *exec_file
= get_exec_file (0);
5877 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5878 target_pid_to_str (ptid_t (pid
)).c_str ());
5880 printf_unfiltered (_("Attaching to %s\n"),
5881 target_pid_to_str (ptid_t (pid
)).c_str ());
5884 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
5886 getpkt (&rs
->buf
, 0);
5888 switch (packet_ok (rs
->buf
,
5889 &remote_protocol_packets
[PACKET_vAttach
]))
5892 if (!target_is_non_stop_p ())
5894 /* Save the reply for later. */
5895 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
5896 strcpy (wait_status
, rs
->buf
.data ());
5898 else if (strcmp (rs
->buf
.data (), "OK") != 0)
5899 error (_("Attaching to %s failed with: %s"),
5900 target_pid_to_str (ptid_t (pid
)).c_str (),
5903 case PACKET_UNKNOWN
:
5904 error (_("This target does not support attaching to a process"));
5906 error (_("Attaching to %s failed"),
5907 target_pid_to_str (ptid_t (pid
)).c_str ());
5910 switch_to_inferior_no_thread (remote_add_inferior (false, pid
, 1, 0));
5912 inferior_ptid
= ptid_t (pid
);
5914 if (target_is_non_stop_p ())
5916 /* Get list of threads. */
5917 update_thread_list ();
5919 thread_info
*thread
= first_thread_of_inferior (current_inferior ());
5920 if (thread
!= nullptr)
5921 switch_to_thread (thread
);
5923 /* Invalidate our notion of the remote current thread. */
5924 record_currthread (rs
, minus_one_ptid
);
5928 /* Now, if we have thread information, update the main thread's
5930 ptid_t curr_ptid
= remote_current_thread (ptid_t (pid
));
5932 /* Add the main thread to the thread list. */
5933 thread_info
*thr
= add_thread_silent (this, curr_ptid
);
5935 switch_to_thread (thr
);
5937 /* Don't consider the thread stopped until we've processed the
5938 saved stop reply. */
5939 set_executing (this, thr
->ptid
, true);
5942 /* Next, if the target can specify a description, read it. We do
5943 this before anything involving memory or registers. */
5944 target_find_description ();
5946 if (!target_is_non_stop_p ())
5948 /* Use the previously fetched status. */
5949 gdb_assert (wait_status
!= NULL
);
5951 if (target_can_async_p ())
5953 struct notif_event
*reply
5954 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
5956 push_stop_reply ((struct stop_reply
*) reply
);
5962 gdb_assert (wait_status
!= NULL
);
5963 strcpy (rs
->buf
.data (), wait_status
);
5964 rs
->cached_wait_status
= 1;
5968 gdb_assert (wait_status
== NULL
);
5971 /* Implementation of the to_post_attach method. */
5974 extended_remote_target::post_attach (int pid
)
5976 /* Get text, data & bss offsets. */
5979 /* In certain cases GDB might not have had the chance to start
5980 symbol lookup up until now. This could happen if the debugged
5981 binary is not using shared libraries, the vsyscall page is not
5982 present (on Linux) and the binary itself hadn't changed since the
5983 debugging process was started. */
5984 if (symfile_objfile
!= NULL
)
5985 remote_check_symbols();
5989 /* Check for the availability of vCont. This function should also check
5993 remote_target::remote_vcont_probe ()
5995 remote_state
*rs
= get_remote_state ();
5998 strcpy (rs
->buf
.data (), "vCont?");
6000 getpkt (&rs
->buf
, 0);
6001 buf
= rs
->buf
.data ();
6003 /* Make sure that the features we assume are supported. */
6004 if (startswith (buf
, "vCont"))
6007 int support_c
, support_C
;
6009 rs
->supports_vCont
.s
= 0;
6010 rs
->supports_vCont
.S
= 0;
6013 rs
->supports_vCont
.t
= 0;
6014 rs
->supports_vCont
.r
= 0;
6015 while (p
&& *p
== ';')
6018 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6019 rs
->supports_vCont
.s
= 1;
6020 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6021 rs
->supports_vCont
.S
= 1;
6022 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6024 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6026 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6027 rs
->supports_vCont
.t
= 1;
6028 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6029 rs
->supports_vCont
.r
= 1;
6031 p
= strchr (p
, ';');
6034 /* If c, and C are not all supported, we can't use vCont. Clearing
6035 BUF will make packet_ok disable the packet. */
6036 if (!support_c
|| !support_C
)
6040 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
6041 rs
->supports_vCont_probed
= true;
6044 /* Helper function for building "vCont" resumptions. Write a
6045 resumption to P. ENDP points to one-passed-the-end of the buffer
6046 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6047 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6048 resumed thread should be single-stepped and/or signalled. If PTID
6049 equals minus_one_ptid, then all threads are resumed; if PTID
6050 represents a process, then all threads of the process are resumed;
6051 the thread to be stepped and/or signalled is given in the global
6055 remote_target::append_resumption (char *p
, char *endp
,
6056 ptid_t ptid
, int step
, gdb_signal siggnal
)
6058 struct remote_state
*rs
= get_remote_state ();
6060 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6061 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6063 /* GDB is willing to range step. */
6064 && use_range_stepping
6065 /* Target supports range stepping. */
6066 && rs
->supports_vCont
.r
6067 /* We don't currently support range stepping multiple
6068 threads with a wildcard (though the protocol allows it,
6069 so stubs shouldn't make an active effort to forbid
6071 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6073 struct thread_info
*tp
;
6075 if (ptid
== minus_one_ptid
)
6077 /* If we don't know about the target thread's tid, then
6078 we're resuming magic_null_ptid (see caller). */
6079 tp
= find_thread_ptid (this, magic_null_ptid
);
6082 tp
= find_thread_ptid (this, ptid
);
6083 gdb_assert (tp
!= NULL
);
6085 if (tp
->control
.may_range_step
)
6087 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6089 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6090 phex_nz (tp
->control
.step_range_start
,
6092 phex_nz (tp
->control
.step_range_end
,
6096 p
+= xsnprintf (p
, endp
- p
, ";s");
6099 p
+= xsnprintf (p
, endp
- p
, ";s");
6100 else if (siggnal
!= GDB_SIGNAL_0
)
6101 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6103 p
+= xsnprintf (p
, endp
- p
, ";c");
6105 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6109 /* All (-1) threads of process. */
6110 nptid
= ptid_t (ptid
.pid (), -1, 0);
6112 p
+= xsnprintf (p
, endp
- p
, ":");
6113 p
= write_ptid (p
, endp
, nptid
);
6115 else if (ptid
!= minus_one_ptid
)
6117 p
+= xsnprintf (p
, endp
- p
, ":");
6118 p
= write_ptid (p
, endp
, ptid
);
6124 /* Clear the thread's private info on resume. */
6127 resume_clear_thread_private_info (struct thread_info
*thread
)
6129 if (thread
->priv
!= NULL
)
6131 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6133 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6134 priv
->watch_data_address
= 0;
6138 /* Append a vCont continue-with-signal action for threads that have a
6139 non-zero stop signal. */
6142 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6145 for (thread_info
*thread
: all_non_exited_threads (this, ptid
))
6146 if (inferior_ptid
!= thread
->ptid
6147 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
6149 p
= append_resumption (p
, endp
, thread
->ptid
,
6150 0, thread
->suspend
.stop_signal
);
6151 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
6152 resume_clear_thread_private_info (thread
);
6158 /* Set the target running, using the packets that use Hc
6162 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6165 struct remote_state
*rs
= get_remote_state ();
6168 rs
->last_sent_signal
= siggnal
;
6169 rs
->last_sent_step
= step
;
6171 /* The c/s/C/S resume packets use Hc, so set the continue
6173 if (ptid
== minus_one_ptid
)
6174 set_continue_thread (any_thread_ptid
);
6176 set_continue_thread (ptid
);
6178 for (thread_info
*thread
: all_non_exited_threads (this))
6179 resume_clear_thread_private_info (thread
);
6181 buf
= rs
->buf
.data ();
6182 if (::execution_direction
== EXEC_REVERSE
)
6184 /* We don't pass signals to the target in reverse exec mode. */
6185 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6186 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6189 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6190 error (_("Remote reverse-step not supported."));
6191 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6192 error (_("Remote reverse-continue not supported."));
6194 strcpy (buf
, step
? "bs" : "bc");
6196 else if (siggnal
!= GDB_SIGNAL_0
)
6198 buf
[0] = step
? 'S' : 'C';
6199 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6200 buf
[2] = tohex (((int) siggnal
) & 0xf);
6204 strcpy (buf
, step
? "s" : "c");
6209 /* Resume the remote inferior by using a "vCont" packet. The thread
6210 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6211 resumed thread should be single-stepped and/or signalled. If PTID
6212 equals minus_one_ptid, then all threads are resumed; the thread to
6213 be stepped and/or signalled is given in the global INFERIOR_PTID.
6214 This function returns non-zero iff it resumes the inferior.
6216 This function issues a strict subset of all possible vCont commands
6220 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6221 enum gdb_signal siggnal
)
6223 struct remote_state
*rs
= get_remote_state ();
6227 /* No reverse execution actions defined for vCont. */
6228 if (::execution_direction
== EXEC_REVERSE
)
6231 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6232 remote_vcont_probe ();
6234 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6237 p
= rs
->buf
.data ();
6238 endp
= p
+ get_remote_packet_size ();
6240 /* If we could generate a wider range of packets, we'd have to worry
6241 about overflowing BUF. Should there be a generic
6242 "multi-part-packet" packet? */
6244 p
+= xsnprintf (p
, endp
- p
, "vCont");
6246 if (ptid
== magic_null_ptid
)
6248 /* MAGIC_NULL_PTID means that we don't have any active threads,
6249 so we don't have any TID numbers the inferior will
6250 understand. Make sure to only send forms that do not specify
6252 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6254 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6256 /* Resume all threads (of all processes, or of a single
6257 process), with preference for INFERIOR_PTID. This assumes
6258 inferior_ptid belongs to the set of all threads we are about
6260 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6262 /* Step inferior_ptid, with or without signal. */
6263 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6266 /* Also pass down any pending signaled resumption for other
6267 threads not the current. */
6268 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6270 /* And continue others without a signal. */
6271 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6275 /* Scheduler locking; resume only PTID. */
6276 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6279 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6282 if (target_is_non_stop_p ())
6284 /* In non-stop, the stub replies to vCont with "OK". The stop
6285 reply will be reported asynchronously by means of a `%Stop'
6287 getpkt (&rs
->buf
, 0);
6288 if (strcmp (rs
->buf
.data (), "OK") != 0)
6289 error (_("Unexpected vCont reply in non-stop mode: %s"),
6296 /* Tell the remote machine to resume. */
6299 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6301 struct remote_state
*rs
= get_remote_state ();
6303 /* When connected in non-stop mode, the core resumes threads
6304 individually. Resuming remote threads directly in target_resume
6305 would thus result in sending one packet per thread. Instead, to
6306 minimize roundtrip latency, here we just store the resume
6307 request; the actual remote resumption will be done in
6308 target_commit_resume / remote_commit_resume, where we'll be able
6309 to do vCont action coalescing. */
6310 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6312 remote_thread_info
*remote_thr
;
6314 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6315 remote_thr
= get_remote_thread_info (this, inferior_ptid
);
6317 remote_thr
= get_remote_thread_info (this, ptid
);
6319 remote_thr
->last_resume_step
= step
;
6320 remote_thr
->last_resume_sig
= siggnal
;
6324 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6325 (explained in remote-notif.c:handle_notification) so
6326 remote_notif_process is not called. We need find a place where
6327 it is safe to start a 'vNotif' sequence. It is good to do it
6328 before resuming inferior, because inferior was stopped and no RSP
6329 traffic at that moment. */
6330 if (!target_is_non_stop_p ())
6331 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6333 rs
->last_resume_exec_dir
= ::execution_direction
;
6335 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6336 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6337 remote_resume_with_hc (ptid
, step
, siggnal
);
6339 /* We are about to start executing the inferior, let's register it
6340 with the event loop. NOTE: this is the one place where all the
6341 execution commands end up. We could alternatively do this in each
6342 of the execution commands in infcmd.c. */
6343 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6344 into infcmd.c in order to allow inferior function calls to work
6345 NOT asynchronously. */
6346 if (target_can_async_p ())
6349 /* We've just told the target to resume. The remote server will
6350 wait for the inferior to stop, and then send a stop reply. In
6351 the mean time, we can't start another command/query ourselves
6352 because the stub wouldn't be ready to process it. This applies
6353 only to the base all-stop protocol, however. In non-stop (which
6354 only supports vCont), the stub replies with an "OK", and is
6355 immediate able to process further serial input. */
6356 if (!target_is_non_stop_p ())
6357 rs
->waiting_for_stop_reply
= 1;
6360 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6362 /* Private per-inferior info for target remote processes. */
6364 struct remote_inferior
: public private_inferior
6366 /* Whether we can send a wildcard vCont for this process. */
6367 bool may_wildcard_vcont
= true;
6370 /* Get the remote private inferior data associated to INF. */
6372 static remote_inferior
*
6373 get_remote_inferior (inferior
*inf
)
6375 if (inf
->priv
== NULL
)
6376 inf
->priv
.reset (new remote_inferior
);
6378 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6381 /* Class used to track the construction of a vCont packet in the
6382 outgoing packet buffer. This is used to send multiple vCont
6383 packets if we have more actions than would fit a single packet. */
6388 explicit vcont_builder (remote_target
*remote
)
6395 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6400 /* The remote target. */
6401 remote_target
*m_remote
;
6403 /* Pointer to the first action. P points here if no action has been
6405 char *m_first_action
;
6407 /* Where the next action will be appended. */
6410 /* The end of the buffer. Must never write past this. */
6414 /* Prepare the outgoing buffer for a new vCont packet. */
6417 vcont_builder::restart ()
6419 struct remote_state
*rs
= m_remote
->get_remote_state ();
6421 m_p
= rs
->buf
.data ();
6422 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6423 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6424 m_first_action
= m_p
;
6427 /* If the vCont packet being built has any action, send it to the
6431 vcont_builder::flush ()
6433 struct remote_state
*rs
;
6435 if (m_p
== m_first_action
)
6438 rs
= m_remote
->get_remote_state ();
6439 m_remote
->putpkt (rs
->buf
);
6440 m_remote
->getpkt (&rs
->buf
, 0);
6441 if (strcmp (rs
->buf
.data (), "OK") != 0)
6442 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6445 /* The largest action is range-stepping, with its two addresses. This
6446 is more than sufficient. If a new, bigger action is created, it'll
6447 quickly trigger a failed assertion in append_resumption (and we'll
6449 #define MAX_ACTION_SIZE 200
6451 /* Append a new vCont action in the outgoing packet being built. If
6452 the action doesn't fit the packet along with previous actions, push
6453 what we've got so far to the remote end and start over a new vCont
6454 packet (with the new action). */
6457 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6459 char buf
[MAX_ACTION_SIZE
+ 1];
6461 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6462 ptid
, step
, siggnal
);
6464 /* Check whether this new action would fit in the vCont packet along
6465 with previous actions. If not, send what we've got so far and
6466 start a new vCont packet. */
6467 size_t rsize
= endp
- buf
;
6468 if (rsize
> m_endp
- m_p
)
6473 /* Should now fit. */
6474 gdb_assert (rsize
<= m_endp
- m_p
);
6477 memcpy (m_p
, buf
, rsize
);
6482 /* to_commit_resume implementation. */
6485 remote_target::commit_resume ()
6487 int any_process_wildcard
;
6488 int may_global_wildcard_vcont
;
6490 /* If connected in all-stop mode, we'd send the remote resume
6491 request directly from remote_resume. Likewise if
6492 reverse-debugging, as there are no defined vCont actions for
6493 reverse execution. */
6494 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6497 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6498 instead of resuming all threads of each process individually.
6499 However, if any thread of a process must remain halted, we can't
6500 send wildcard resumes and must send one action per thread.
6502 Care must be taken to not resume threads/processes the server
6503 side already told us are stopped, but the core doesn't know about
6504 yet, because the events are still in the vStopped notification
6507 #1 => vCont s:p1.1;c
6509 #3 <= %Stopped T05 p1.1
6514 #8 (infrun handles the stop for p1.1 and continues stepping)
6515 #9 => vCont s:p1.1;c
6517 The last vCont above would resume thread p1.2 by mistake, because
6518 the server has no idea that the event for p1.2 had not been
6521 The server side must similarly ignore resume actions for the
6522 thread that has a pending %Stopped notification (and any other
6523 threads with events pending), until GDB acks the notification
6524 with vStopped. Otherwise, e.g., the following case is
6527 #1 => g (or any other packet)
6529 #3 <= %Stopped T05 p1.2
6530 #4 => vCont s:p1.1;c
6533 Above, the server must not resume thread p1.2. GDB can't know
6534 that p1.2 stopped until it acks the %Stopped notification, and
6535 since from GDB's perspective all threads should be running, it
6538 Finally, special care must also be given to handling fork/vfork
6539 events. A (v)fork event actually tells us that two processes
6540 stopped -- the parent and the child. Until we follow the fork,
6541 we must not resume the child. Therefore, if we have a pending
6542 fork follow, we must not send a global wildcard resume action
6543 (vCont;c). We can still send process-wide wildcards though. */
6545 /* Start by assuming a global wildcard (vCont;c) is possible. */
6546 may_global_wildcard_vcont
= 1;
6548 /* And assume every process is individually wildcard-able too. */
6549 for (inferior
*inf
: all_non_exited_inferiors (this))
6551 remote_inferior
*priv
= get_remote_inferior (inf
);
6553 priv
->may_wildcard_vcont
= true;
6556 /* Check for any pending events (not reported or processed yet) and
6557 disable process and global wildcard resumes appropriately. */
6558 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6560 for (thread_info
*tp
: all_non_exited_threads (this))
6562 /* If a thread of a process is not meant to be resumed, then we
6563 can't wildcard that process. */
6566 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6568 /* And if we can't wildcard a process, we can't wildcard
6569 everything either. */
6570 may_global_wildcard_vcont
= 0;
6574 /* If a thread is the parent of an unfollowed fork, then we
6575 can't do a global wildcard, as that would resume the fork
6577 if (is_pending_fork_parent_thread (tp
))
6578 may_global_wildcard_vcont
= 0;
6581 /* Now let's build the vCont packet(s). Actions must be appended
6582 from narrower to wider scopes (thread -> process -> global). If
6583 we end up with too many actions for a single packet vcont_builder
6584 flushes the current vCont packet to the remote side and starts a
6586 struct vcont_builder
vcont_builder (this);
6588 /* Threads first. */
6589 for (thread_info
*tp
: all_non_exited_threads (this))
6591 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6593 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
6596 gdb_assert (!thread_is_in_step_over_chain (tp
));
6598 if (!remote_thr
->last_resume_step
6599 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
6600 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6602 /* We'll send a wildcard resume instead. */
6603 remote_thr
->vcont_resumed
= 1;
6607 vcont_builder
.push_action (tp
->ptid
,
6608 remote_thr
->last_resume_step
,
6609 remote_thr
->last_resume_sig
);
6610 remote_thr
->vcont_resumed
= 1;
6613 /* Now check whether we can send any process-wide wildcard. This is
6614 to avoid sending a global wildcard in the case nothing is
6615 supposed to be resumed. */
6616 any_process_wildcard
= 0;
6618 for (inferior
*inf
: all_non_exited_inferiors (this))
6620 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6622 any_process_wildcard
= 1;
6627 if (any_process_wildcard
)
6629 /* If all processes are wildcard-able, then send a single "c"
6630 action, otherwise, send an "all (-1) threads of process"
6631 continue action for each running process, if any. */
6632 if (may_global_wildcard_vcont
)
6634 vcont_builder
.push_action (minus_one_ptid
,
6635 false, GDB_SIGNAL_0
);
6639 for (inferior
*inf
: all_non_exited_inferiors (this))
6641 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6643 vcont_builder
.push_action (ptid_t (inf
->pid
),
6644 false, GDB_SIGNAL_0
);
6650 vcont_builder
.flush ();
6655 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6656 thread, all threads of a remote process, or all threads of all
6660 remote_target::remote_stop_ns (ptid_t ptid
)
6662 struct remote_state
*rs
= get_remote_state ();
6663 char *p
= rs
->buf
.data ();
6664 char *endp
= p
+ get_remote_packet_size ();
6666 /* FIXME: This supports_vCont_probed check is a workaround until
6667 packet_support is per-connection. */
6668 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6669 || !rs
->supports_vCont_probed
)
6670 remote_vcont_probe ();
6672 if (!rs
->supports_vCont
.t
)
6673 error (_("Remote server does not support stopping threads"));
6675 if (ptid
== minus_one_ptid
6676 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6677 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6682 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6685 /* All (-1) threads of process. */
6686 nptid
= ptid_t (ptid
.pid (), -1, 0);
6689 /* Small optimization: if we already have a stop reply for
6690 this thread, no use in telling the stub we want this
6692 if (peek_stop_reply (ptid
))
6698 write_ptid (p
, endp
, nptid
);
6701 /* In non-stop, we get an immediate OK reply. The stop reply will
6702 come in asynchronously by notification. */
6704 getpkt (&rs
->buf
, 0);
6705 if (strcmp (rs
->buf
.data (), "OK") != 0)
6706 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6710 /* All-stop version of target_interrupt. Sends a break or a ^C to
6711 interrupt the remote target. It is undefined which thread of which
6712 process reports the interrupt. */
6715 remote_target::remote_interrupt_as ()
6717 struct remote_state
*rs
= get_remote_state ();
6719 rs
->ctrlc_pending_p
= 1;
6721 /* If the inferior is stopped already, but the core didn't know
6722 about it yet, just ignore the request. The cached wait status
6723 will be collected in remote_wait. */
6724 if (rs
->cached_wait_status
)
6727 /* Send interrupt_sequence to remote target. */
6728 send_interrupt_sequence ();
6731 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6732 the remote target. It is undefined which thread of which process
6733 reports the interrupt. Throws an error if the packet is not
6734 supported by the server. */
6737 remote_target::remote_interrupt_ns ()
6739 struct remote_state
*rs
= get_remote_state ();
6740 char *p
= rs
->buf
.data ();
6741 char *endp
= p
+ get_remote_packet_size ();
6743 xsnprintf (p
, endp
- p
, "vCtrlC");
6745 /* In non-stop, we get an immediate OK reply. The stop reply will
6746 come in asynchronously by notification. */
6748 getpkt (&rs
->buf
, 0);
6750 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6754 case PACKET_UNKNOWN
:
6755 error (_("No support for interrupting the remote target."));
6757 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
6761 /* Implement the to_stop function for the remote targets. */
6764 remote_target::stop (ptid_t ptid
)
6767 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6769 if (target_is_non_stop_p ())
6770 remote_stop_ns (ptid
);
6773 /* We don't currently have a way to transparently pause the
6774 remote target in all-stop mode. Interrupt it instead. */
6775 remote_interrupt_as ();
6779 /* Implement the to_interrupt function for the remote targets. */
6782 remote_target::interrupt ()
6785 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6787 if (target_is_non_stop_p ())
6788 remote_interrupt_ns ();
6790 remote_interrupt_as ();
6793 /* Implement the to_pass_ctrlc function for the remote targets. */
6796 remote_target::pass_ctrlc ()
6798 struct remote_state
*rs
= get_remote_state ();
6801 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6803 /* If we're starting up, we're not fully synced yet. Quit
6805 if (rs
->starting_up
)
6807 /* If ^C has already been sent once, offer to disconnect. */
6808 else if (rs
->ctrlc_pending_p
)
6811 target_interrupt ();
6814 /* Ask the user what to do when an interrupt is received. */
6817 remote_target::interrupt_query ()
6819 struct remote_state
*rs
= get_remote_state ();
6821 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6823 if (query (_("The target is not responding to interrupt requests.\n"
6824 "Stop debugging it? ")))
6826 remote_unpush_target (this);
6827 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6832 if (query (_("Interrupted while waiting for the program.\n"
6833 "Give up waiting? ")))
6838 /* Enable/disable target terminal ownership. Most targets can use
6839 terminal groups to control terminal ownership. Remote targets are
6840 different in that explicit transfer of ownership to/from GDB/target
6844 remote_target::terminal_inferior ()
6846 /* NOTE: At this point we could also register our selves as the
6847 recipient of all input. Any characters typed could then be
6848 passed on down to the target. */
6852 remote_target::terminal_ours ()
6857 remote_console_output (const char *msg
)
6861 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6864 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6868 gdb_stdtarg
->puts (tb
);
6870 gdb_stdtarg
->flush ();
6873 struct stop_reply
: public notif_event
6877 /* The identifier of the thread about this event */
6880 /* The remote state this event is associated with. When the remote
6881 connection, represented by a remote_state object, is closed,
6882 all the associated stop_reply events should be released. */
6883 struct remote_state
*rs
;
6885 struct target_waitstatus ws
;
6887 /* The architecture associated with the expedited registers. */
6890 /* Expedited registers. This makes remote debugging a bit more
6891 efficient for those targets that provide critical registers as
6892 part of their normal status mechanism (as another roundtrip to
6893 fetch them is avoided). */
6894 std::vector
<cached_reg_t
> regcache
;
6896 enum target_stop_reason stop_reason
;
6898 CORE_ADDR watch_data_address
;
6903 /* Return the length of the stop reply queue. */
6906 remote_target::stop_reply_queue_length ()
6908 remote_state
*rs
= get_remote_state ();
6909 return rs
->stop_reply_queue
.size ();
6913 remote_notif_stop_parse (remote_target
*remote
,
6914 struct notif_client
*self
, const char *buf
,
6915 struct notif_event
*event
)
6917 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6921 remote_notif_stop_ack (remote_target
*remote
,
6922 struct notif_client
*self
, const char *buf
,
6923 struct notif_event
*event
)
6925 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6928 putpkt (remote
, self
->ack_command
);
6930 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6932 /* We got an unknown stop reply. */
6933 error (_("Unknown stop reply"));
6936 remote
->push_stop_reply (stop_reply
);
6940 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
6941 struct notif_client
*self
)
6943 /* We can't get pending events in remote_notif_process for
6944 notification stop, and we have to do this in remote_wait_ns
6945 instead. If we fetch all queued events from stub, remote stub
6946 may exit and we have no chance to process them back in
6948 remote_state
*rs
= remote
->get_remote_state ();
6949 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
6953 stop_reply::~stop_reply ()
6955 for (cached_reg_t
®
: regcache
)
6959 static notif_event_up
6960 remote_notif_stop_alloc_reply ()
6962 return notif_event_up (new struct stop_reply ());
6965 /* A client of notification Stop. */
6967 struct notif_client notif_client_stop
=
6971 remote_notif_stop_parse
,
6972 remote_notif_stop_ack
,
6973 remote_notif_stop_can_get_pending_events
,
6974 remote_notif_stop_alloc_reply
,
6978 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6979 the pid of the process that owns the threads we want to check, or
6980 -1 if we want to check all threads. */
6983 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6986 if (ws
->kind
== TARGET_WAITKIND_FORKED
6987 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6989 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
6996 /* Return the thread's pending status used to determine whether the
6997 thread is a fork parent stopped at a fork event. */
6999 static struct target_waitstatus
*
7000 thread_pending_fork_status (struct thread_info
*thread
)
7002 if (thread
->suspend
.waitstatus_pending_p
)
7003 return &thread
->suspend
.waitstatus
;
7005 return &thread
->pending_follow
;
7008 /* Determine if THREAD is a pending fork parent thread. */
7011 is_pending_fork_parent_thread (struct thread_info
*thread
)
7013 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7016 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7019 /* If CONTEXT contains any fork child threads that have not been
7020 reported yet, remove them from the CONTEXT list. If such a
7021 thread exists it is because we are stopped at a fork catchpoint
7022 and have not yet called follow_fork, which will set up the
7023 host-side data structures for the new process. */
7026 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7029 struct notif_client
*notif
= ¬if_client_stop
;
7031 /* For any threads stopped at a fork event, remove the corresponding
7032 fork child threads from the CONTEXT list. */
7033 for (thread_info
*thread
: all_non_exited_threads (this))
7035 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7037 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7038 context
->remove_thread (ws
->value
.related_pid
);
7041 /* Check for any pending fork events (not reported or processed yet)
7042 in process PID and remove those fork child threads from the
7043 CONTEXT list as well. */
7044 remote_notif_get_pending_events (notif
);
7045 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7046 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7047 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7048 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7049 context
->remove_thread (event
->ws
.value
.related_pid
);
7052 /* Check whether any event pending in the vStopped queue would prevent
7053 a global or process wildcard vCont action. Clear
7054 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7055 and clear the event inferior's may_wildcard_vcont flag if we can't
7056 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7059 remote_target::check_pending_events_prevent_wildcard_vcont
7060 (int *may_global_wildcard
)
7062 struct notif_client
*notif
= ¬if_client_stop
;
7064 remote_notif_get_pending_events (notif
);
7065 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7067 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7068 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7071 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7072 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7073 *may_global_wildcard
= 0;
7075 struct inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7077 /* This may be the first time we heard about this process.
7078 Regardless, we must not do a global wildcard resume, otherwise
7079 we'd resume this process too. */
7080 *may_global_wildcard
= 0;
7082 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7086 /* Discard all pending stop replies of inferior INF. */
7089 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7091 struct stop_reply
*reply
;
7092 struct remote_state
*rs
= get_remote_state ();
7093 struct remote_notif_state
*rns
= rs
->notif_state
;
7095 /* This function can be notified when an inferior exists. When the
7096 target is not remote, the notification state is NULL. */
7097 if (rs
->remote_desc
== NULL
)
7100 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7102 /* Discard the in-flight notification. */
7103 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7106 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
7109 /* Discard the stop replies we have already pulled with
7111 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7112 rs
->stop_reply_queue
.end (),
7113 [=] (const stop_reply_up
&event
)
7115 return event
->ptid
.pid () == inf
->pid
;
7117 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7120 /* Discard the stop replies for RS in stop_reply_queue. */
7123 remote_target::discard_pending_stop_replies_in_queue ()
7125 remote_state
*rs
= get_remote_state ();
7127 /* Discard the stop replies we have already pulled with
7129 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7130 rs
->stop_reply_queue
.end (),
7131 [=] (const stop_reply_up
&event
)
7133 return event
->rs
== rs
;
7135 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7138 /* Remove the first reply in 'stop_reply_queue' which matches
7142 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7144 remote_state
*rs
= get_remote_state ();
7146 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7147 rs
->stop_reply_queue
.end (),
7148 [=] (const stop_reply_up
&event
)
7150 return event
->ptid
.matches (ptid
);
7152 struct stop_reply
*result
;
7153 if (iter
== rs
->stop_reply_queue
.end ())
7157 result
= iter
->release ();
7158 rs
->stop_reply_queue
.erase (iter
);
7162 fprintf_unfiltered (gdb_stdlog
,
7163 "notif: discard queued event: 'Stop' in %s\n",
7164 target_pid_to_str (ptid
).c_str ());
7169 /* Look for a queued stop reply belonging to PTID. If one is found,
7170 remove it from the queue, and return it. Returns NULL if none is
7171 found. If there are still queued events left to process, tell the
7172 event loop to get back to target_wait soon. */
7175 remote_target::queued_stop_reply (ptid_t ptid
)
7177 remote_state
*rs
= get_remote_state ();
7178 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7180 if (!rs
->stop_reply_queue
.empty ())
7182 /* There's still at least an event left. */
7183 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7189 /* Push a fully parsed stop reply in the stop reply queue. Since we
7190 know that we now have at least one queued event left to pass to the
7191 core side, tell the event loop to get back to target_wait soon. */
7194 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7196 remote_state
*rs
= get_remote_state ();
7197 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7200 fprintf_unfiltered (gdb_stdlog
,
7201 "notif: push 'Stop' %s to queue %d\n",
7202 target_pid_to_str (new_event
->ptid
).c_str (),
7203 int (rs
->stop_reply_queue
.size ()));
7205 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7208 /* Returns true if we have a stop reply for PTID. */
7211 remote_target::peek_stop_reply (ptid_t ptid
)
7213 remote_state
*rs
= get_remote_state ();
7214 for (auto &event
: rs
->stop_reply_queue
)
7215 if (ptid
== event
->ptid
7216 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7221 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7222 starting with P and ending with PEND matches PREFIX. */
7225 strprefix (const char *p
, const char *pend
, const char *prefix
)
7227 for ( ; p
< pend
; p
++, prefix
++)
7230 return *prefix
== '\0';
7233 /* Parse the stop reply in BUF. Either the function succeeds, and the
7234 result is stored in EVENT, or throws an error. */
7237 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7239 remote_arch_state
*rsa
= NULL
;
7244 event
->ptid
= null_ptid
;
7245 event
->rs
= get_remote_state ();
7246 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7247 event
->ws
.value
.integer
= 0;
7248 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7249 event
->regcache
.clear ();
7254 case 'T': /* Status with PC, SP, FP, ... */
7255 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7256 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7258 n... = register number
7259 r... = register contents
7262 p
= &buf
[3]; /* after Txx */
7268 p1
= strchr (p
, ':');
7270 error (_("Malformed packet(a) (missing colon): %s\n\
7274 error (_("Malformed packet(a) (missing register number): %s\n\
7278 /* Some "registers" are actually extended stop information.
7279 Note if you're adding a new entry here: GDB 7.9 and
7280 earlier assume that all register "numbers" that start
7281 with an hex digit are real register numbers. Make sure
7282 the server only sends such a packet if it knows the
7283 client understands it. */
7285 if (strprefix (p
, p1
, "thread"))
7286 event
->ptid
= read_ptid (++p1
, &p
);
7287 else if (strprefix (p
, p1
, "syscall_entry"))
7291 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7292 p
= unpack_varlen_hex (++p1
, &sysno
);
7293 event
->ws
.value
.syscall_number
= (int) sysno
;
7295 else if (strprefix (p
, p1
, "syscall_return"))
7299 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7300 p
= unpack_varlen_hex (++p1
, &sysno
);
7301 event
->ws
.value
.syscall_number
= (int) sysno
;
7303 else if (strprefix (p
, p1
, "watch")
7304 || strprefix (p
, p1
, "rwatch")
7305 || strprefix (p
, p1
, "awatch"))
7307 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7308 p
= unpack_varlen_hex (++p1
, &addr
);
7309 event
->watch_data_address
= (CORE_ADDR
) addr
;
7311 else if (strprefix (p
, p1
, "swbreak"))
7313 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7315 /* Make sure the stub doesn't forget to indicate support
7317 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7318 error (_("Unexpected swbreak stop reason"));
7320 /* The value part is documented as "must be empty",
7321 though we ignore it, in case we ever decide to make
7322 use of it in a backward compatible way. */
7323 p
= strchrnul (p1
+ 1, ';');
7325 else if (strprefix (p
, p1
, "hwbreak"))
7327 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7329 /* Make sure the stub doesn't forget to indicate support
7331 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7332 error (_("Unexpected hwbreak stop reason"));
7335 p
= strchrnul (p1
+ 1, ';');
7337 else if (strprefix (p
, p1
, "library"))
7339 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7340 p
= strchrnul (p1
+ 1, ';');
7342 else if (strprefix (p
, p1
, "replaylog"))
7344 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7345 /* p1 will indicate "begin" or "end", but it makes
7346 no difference for now, so ignore it. */
7347 p
= strchrnul (p1
+ 1, ';');
7349 else if (strprefix (p
, p1
, "core"))
7353 p
= unpack_varlen_hex (++p1
, &c
);
7356 else if (strprefix (p
, p1
, "fork"))
7358 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7359 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7361 else if (strprefix (p
, p1
, "vfork"))
7363 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7364 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7366 else if (strprefix (p
, p1
, "vforkdone"))
7368 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7369 p
= strchrnul (p1
+ 1, ';');
7371 else if (strprefix (p
, p1
, "exec"))
7376 /* Determine the length of the execd pathname. */
7377 p
= unpack_varlen_hex (++p1
, &ignored
);
7378 pathlen
= (p
- p1
) / 2;
7380 /* Save the pathname for event reporting and for
7381 the next run command. */
7382 gdb::unique_xmalloc_ptr
<char[]> pathname
7383 ((char *) xmalloc (pathlen
+ 1));
7384 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7385 pathname
[pathlen
] = '\0';
7387 /* This is freed during event handling. */
7388 event
->ws
.value
.execd_pathname
= pathname
.release ();
7389 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7391 /* Skip the registers included in this packet, since
7392 they may be for an architecture different from the
7393 one used by the original program. */
7396 else if (strprefix (p
, p1
, "create"))
7398 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7399 p
= strchrnul (p1
+ 1, ';');
7408 p
= strchrnul (p1
+ 1, ';');
7413 /* Maybe a real ``P'' register number. */
7414 p_temp
= unpack_varlen_hex (p
, &pnum
);
7415 /* If the first invalid character is the colon, we got a
7416 register number. Otherwise, it's an unknown stop
7420 /* If we haven't parsed the event's thread yet, find
7421 it now, in order to find the architecture of the
7422 reported expedited registers. */
7423 if (event
->ptid
== null_ptid
)
7425 /* If there is no thread-id information then leave
7426 the event->ptid as null_ptid. Later in
7427 process_stop_reply we will pick a suitable
7429 const char *thr
= strstr (p1
+ 1, ";thread:");
7431 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7438 = (event
->ptid
== null_ptid
7440 : find_inferior_ptid (this, event
->ptid
));
7441 /* If this is the first time we learn anything
7442 about this process, skip the registers
7443 included in this packet, since we don't yet
7444 know which architecture to use to parse them.
7445 We'll determine the architecture later when
7446 we process the stop reply and retrieve the
7447 target description, via
7448 remote_notice_new_inferior ->
7449 post_create_inferior. */
7452 p
= strchrnul (p1
+ 1, ';');
7457 event
->arch
= inf
->gdbarch
;
7458 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7462 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7463 cached_reg_t cached_reg
;
7466 error (_("Remote sent bad register number %s: %s\n\
7468 hex_string (pnum
), p
, buf
);
7470 cached_reg
.num
= reg
->regnum
;
7471 cached_reg
.data
= (gdb_byte
*)
7472 xmalloc (register_size (event
->arch
, reg
->regnum
));
7475 fieldsize
= hex2bin (p
, cached_reg
.data
,
7476 register_size (event
->arch
, reg
->regnum
));
7478 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7479 warning (_("Remote reply is too short: %s"), buf
);
7481 event
->regcache
.push_back (cached_reg
);
7485 /* Not a number. Silently skip unknown optional
7487 p
= strchrnul (p1
+ 1, ';');
7492 error (_("Remote register badly formatted: %s\nhere: %s"),
7497 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7501 case 'S': /* Old style status, just signal only. */
7505 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7506 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7507 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7508 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7510 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7513 case 'w': /* Thread exited. */
7517 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7518 p
= unpack_varlen_hex (&buf
[1], &value
);
7519 event
->ws
.value
.integer
= value
;
7521 error (_("stop reply packet badly formatted: %s"), buf
);
7522 event
->ptid
= read_ptid (++p
, NULL
);
7525 case 'W': /* Target exited. */
7530 /* GDB used to accept only 2 hex chars here. Stubs should
7531 only send more if they detect GDB supports multi-process
7533 p
= unpack_varlen_hex (&buf
[1], &value
);
7537 /* The remote process exited. */
7538 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7539 event
->ws
.value
.integer
= value
;
7543 /* The remote process exited with a signal. */
7544 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7545 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7546 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7548 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7551 /* If no process is specified, return null_ptid, and let the
7552 caller figure out the right process to use. */
7562 else if (startswith (p
, "process:"))
7566 p
+= sizeof ("process:") - 1;
7567 unpack_varlen_hex (p
, &upid
);
7571 error (_("unknown stop reply packet: %s"), buf
);
7574 error (_("unknown stop reply packet: %s"), buf
);
7575 event
->ptid
= ptid_t (pid
);
7579 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7580 event
->ptid
= minus_one_ptid
;
7585 /* When the stub wants to tell GDB about a new notification reply, it
7586 sends a notification (%Stop, for example). Those can come it at
7587 any time, hence, we have to make sure that any pending
7588 putpkt/getpkt sequence we're making is finished, before querying
7589 the stub for more events with the corresponding ack command
7590 (vStopped, for example). E.g., if we started a vStopped sequence
7591 immediately upon receiving the notification, something like this
7599 1.6) <-- (registers reply to step #1.3)
7601 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7604 To solve this, whenever we parse a %Stop notification successfully,
7605 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7606 doing whatever we were doing:
7612 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7613 2.5) <-- (registers reply to step #2.3)
7615 Eventually after step #2.5, we return to the event loop, which
7616 notices there's an event on the
7617 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7618 associated callback --- the function below. At this point, we're
7619 always safe to start a vStopped sequence. :
7622 2.7) <-- T05 thread:2
7628 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7630 struct remote_state
*rs
= get_remote_state ();
7632 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7635 fprintf_unfiltered (gdb_stdlog
,
7636 "notif: process: '%s' ack pending event\n",
7640 nc
->ack (this, nc
, rs
->buf
.data (),
7641 rs
->notif_state
->pending_event
[nc
->id
]);
7642 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7646 getpkt (&rs
->buf
, 0);
7647 if (strcmp (rs
->buf
.data (), "OK") == 0)
7650 remote_notif_ack (this, nc
, rs
->buf
.data ());
7656 fprintf_unfiltered (gdb_stdlog
,
7657 "notif: process: '%s' no pending reply\n",
7662 /* Wrapper around remote_target::remote_notif_get_pending_events to
7663 avoid having to export the whole remote_target class. */
7666 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7668 remote
->remote_notif_get_pending_events (nc
);
7671 /* Called when it is decided that STOP_REPLY holds the info of the
7672 event that is to be returned to the core. This function always
7673 destroys STOP_REPLY. */
7676 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
7677 struct target_waitstatus
*status
)
7681 *status
= stop_reply
->ws
;
7682 ptid
= stop_reply
->ptid
;
7684 /* If no thread/process was reported by the stub then use the first
7685 non-exited thread in the current target. */
7686 if (ptid
== null_ptid
)
7688 /* Some stop events apply to all threads in an inferior, while others
7689 only apply to a single thread. */
7690 bool is_stop_for_all_threads
7691 = (status
->kind
== TARGET_WAITKIND_EXITED
7692 || status
->kind
== TARGET_WAITKIND_SIGNALLED
);
7694 for (thread_info
*thr
: all_non_exited_threads (this))
7696 if (ptid
!= null_ptid
7697 && (!is_stop_for_all_threads
7698 || ptid
.pid () != thr
->ptid
.pid ()))
7700 static bool warned
= false;
7704 /* If you are seeing this warning then the remote target
7705 has stopped without specifying a thread-id, but the
7706 target does have multiple threads (or inferiors), and
7707 so GDB is having to guess which thread stopped.
7709 Examples of what might cause this are the target
7710 sending and 'S' stop packet, or a 'T' stop packet and
7711 not including a thread-id.
7713 Additionally, the target might send a 'W' or 'X
7714 packet without including a process-id, when the target
7715 has multiple running inferiors. */
7716 if (is_stop_for_all_threads
)
7717 warning (_("multi-inferior target stopped without "
7718 "sending a process-id, using first "
7719 "non-exited inferior"));
7721 warning (_("multi-threaded target stopped without "
7722 "sending a thread-id, using first "
7723 "non-exited thread"));
7729 /* If this is a stop for all threads then don't use a particular
7730 threads ptid, instead create a new ptid where only the pid
7732 if (is_stop_for_all_threads
)
7733 ptid
= ptid_t (thr
->ptid
.pid ());
7737 gdb_assert (ptid
!= null_ptid
);
7740 if (status
->kind
!= TARGET_WAITKIND_EXITED
7741 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7742 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7744 /* Expedited registers. */
7745 if (!stop_reply
->regcache
.empty ())
7747 struct regcache
*regcache
7748 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
7750 for (cached_reg_t
®
: stop_reply
->regcache
)
7752 regcache
->raw_supply (reg
.num
, reg
.data
);
7756 stop_reply
->regcache
.clear ();
7759 remote_notice_new_inferior (ptid
, 0);
7760 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
7761 remote_thr
->core
= stop_reply
->core
;
7762 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7763 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7764 remote_thr
->vcont_resumed
= 0;
7771 /* The non-stop mode version of target_wait. */
7774 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
,
7775 target_wait_flags options
)
7777 struct remote_state
*rs
= get_remote_state ();
7778 struct stop_reply
*stop_reply
;
7782 /* If in non-stop mode, get out of getpkt even if a
7783 notification is received. */
7785 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
7788 if (ret
!= -1 && !is_notif
)
7791 case 'E': /* Error of some sort. */
7792 /* We're out of sync with the target now. Did it continue
7793 or not? We can't tell which thread it was in non-stop,
7794 so just ignore this. */
7795 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
7797 case 'O': /* Console output. */
7798 remote_console_output (&rs
->buf
[1]);
7801 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
7805 /* Acknowledge a pending stop reply that may have arrived in the
7807 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7808 remote_notif_get_pending_events (¬if_client_stop
);
7810 /* If indeed we noticed a stop reply, we're done. */
7811 stop_reply
= queued_stop_reply (ptid
);
7812 if (stop_reply
!= NULL
)
7813 return process_stop_reply (stop_reply
, status
);
7815 /* Still no event. If we're just polling for an event, then
7816 return to the event loop. */
7817 if (options
& TARGET_WNOHANG
)
7819 status
->kind
= TARGET_WAITKIND_IGNORE
;
7820 return minus_one_ptid
;
7823 /* Otherwise do a blocking wait. */
7824 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
7828 /* Return the first resumed thread. */
7831 first_remote_resumed_thread (remote_target
*target
)
7833 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
7839 /* Wait until the remote machine stops, then return, storing status in
7840 STATUS just as `wait' would. */
7843 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
,
7844 target_wait_flags options
)
7846 struct remote_state
*rs
= get_remote_state ();
7847 ptid_t event_ptid
= null_ptid
;
7849 struct stop_reply
*stop_reply
;
7853 status
->kind
= TARGET_WAITKIND_IGNORE
;
7854 status
->value
.integer
= 0;
7856 stop_reply
= queued_stop_reply (ptid
);
7857 if (stop_reply
!= NULL
)
7858 return process_stop_reply (stop_reply
, status
);
7860 if (rs
->cached_wait_status
)
7861 /* Use the cached wait status, but only once. */
7862 rs
->cached_wait_status
= 0;
7867 int forever
= ((options
& TARGET_WNOHANG
) == 0
7868 && rs
->wait_forever_enabled_p
);
7870 if (!rs
->waiting_for_stop_reply
)
7872 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7873 return minus_one_ptid
;
7876 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7877 _never_ wait for ever -> test on target_is_async_p().
7878 However, before we do that we need to ensure that the caller
7879 knows how to take the target into/out of async mode. */
7880 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
7882 /* GDB gets a notification. Return to core as this event is
7884 if (ret
!= -1 && is_notif
)
7885 return minus_one_ptid
;
7887 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7888 return minus_one_ptid
;
7891 buf
= rs
->buf
.data ();
7893 /* Assume that the target has acknowledged Ctrl-C unless we receive
7894 an 'F' or 'O' packet. */
7895 if (buf
[0] != 'F' && buf
[0] != 'O')
7896 rs
->ctrlc_pending_p
= 0;
7900 case 'E': /* Error of some sort. */
7901 /* We're out of sync with the target now. Did it continue or
7902 not? Not is more likely, so report a stop. */
7903 rs
->waiting_for_stop_reply
= 0;
7905 warning (_("Remote failure reply: %s"), buf
);
7906 status
->kind
= TARGET_WAITKIND_STOPPED
;
7907 status
->value
.sig
= GDB_SIGNAL_0
;
7909 case 'F': /* File-I/O request. */
7910 /* GDB may access the inferior memory while handling the File-I/O
7911 request, but we don't want GDB accessing memory while waiting
7912 for a stop reply. See the comments in putpkt_binary. Set
7913 waiting_for_stop_reply to 0 temporarily. */
7914 rs
->waiting_for_stop_reply
= 0;
7915 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
7916 rs
->ctrlc_pending_p
= 0;
7917 /* GDB handled the File-I/O request, and the target is running
7918 again. Keep waiting for events. */
7919 rs
->waiting_for_stop_reply
= 1;
7921 case 'N': case 'T': case 'S': case 'X': case 'W':
7923 /* There is a stop reply to handle. */
7924 rs
->waiting_for_stop_reply
= 0;
7927 = (struct stop_reply
*) remote_notif_parse (this,
7931 event_ptid
= process_stop_reply (stop_reply
, status
);
7934 case 'O': /* Console output. */
7935 remote_console_output (buf
+ 1);
7938 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7940 /* Zero length reply means that we tried 'S' or 'C' and the
7941 remote system doesn't support it. */
7942 target_terminal::ours_for_output ();
7944 ("Can't send signals to this remote system. %s not sent.\n",
7945 gdb_signal_to_name (rs
->last_sent_signal
));
7946 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7947 target_terminal::inferior ();
7949 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7955 warning (_("Invalid remote reply: %s"), buf
);
7959 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7960 return minus_one_ptid
;
7961 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7963 /* Nothing interesting happened. If we're doing a non-blocking
7964 poll, we're done. Otherwise, go back to waiting. */
7965 if (options
& TARGET_WNOHANG
)
7966 return minus_one_ptid
;
7970 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7971 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7973 if (event_ptid
!= null_ptid
)
7974 record_currthread (rs
, event_ptid
);
7976 event_ptid
= first_remote_resumed_thread (this);
7980 /* A process exit. Invalidate our notion of current thread. */
7981 record_currthread (rs
, minus_one_ptid
);
7982 /* It's possible that the packet did not include a pid. */
7983 if (event_ptid
== null_ptid
)
7984 event_ptid
= first_remote_resumed_thread (this);
7985 /* EVENT_PTID could still be NULL_PTID. Double-check. */
7986 if (event_ptid
== null_ptid
)
7987 event_ptid
= magic_null_ptid
;
7993 /* Wait until the remote machine stops, then return, storing status in
7994 STATUS just as `wait' would. */
7997 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
,
7998 target_wait_flags options
)
8002 if (target_is_non_stop_p ())
8003 event_ptid
= wait_ns (ptid
, status
, options
);
8005 event_ptid
= wait_as (ptid
, status
, options
);
8007 if (target_is_async_p ())
8009 remote_state
*rs
= get_remote_state ();
8011 /* If there are are events left in the queue tell the event loop
8013 if (!rs
->stop_reply_queue
.empty ())
8014 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
8020 /* Fetch a single register using a 'p' packet. */
8023 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8026 struct gdbarch
*gdbarch
= regcache
->arch ();
8027 struct remote_state
*rs
= get_remote_state ();
8029 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8032 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8035 if (reg
->pnum
== -1)
8038 p
= rs
->buf
.data ();
8040 p
+= hexnumstr (p
, reg
->pnum
);
8043 getpkt (&rs
->buf
, 0);
8045 buf
= rs
->buf
.data ();
8047 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8051 case PACKET_UNKNOWN
:
8054 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8055 gdbarch_register_name (regcache
->arch (),
8060 /* If this register is unfetchable, tell the regcache. */
8063 regcache
->raw_supply (reg
->regnum
, NULL
);
8067 /* Otherwise, parse and supply the value. */
8073 error (_("fetch_register_using_p: early buf termination"));
8075 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8078 regcache
->raw_supply (reg
->regnum
, regp
);
8082 /* Fetch the registers included in the target's 'g' packet. */
8085 remote_target::send_g_packet ()
8087 struct remote_state
*rs
= get_remote_state ();
8090 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8092 getpkt (&rs
->buf
, 0);
8093 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8094 error (_("Could not read registers; remote failure reply '%s'"),
8097 /* We can get out of synch in various cases. If the first character
8098 in the buffer is not a hex character, assume that has happened
8099 and try to fetch another packet to read. */
8100 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8101 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8102 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8103 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8106 fprintf_unfiltered (gdb_stdlog
,
8107 "Bad register packet; fetching a new packet\n");
8108 getpkt (&rs
->buf
, 0);
8111 buf_len
= strlen (rs
->buf
.data ());
8113 /* Sanity check the received packet. */
8114 if (buf_len
% 2 != 0)
8115 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8121 remote_target::process_g_packet (struct regcache
*regcache
)
8123 struct gdbarch
*gdbarch
= regcache
->arch ();
8124 struct remote_state
*rs
= get_remote_state ();
8125 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8130 buf_len
= strlen (rs
->buf
.data ());
8132 /* Further sanity checks, with knowledge of the architecture. */
8133 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8134 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8136 rsa
->sizeof_g_packet
, buf_len
/ 2,
8139 /* Save the size of the packet sent to us by the target. It is used
8140 as a heuristic when determining the max size of packets that the
8141 target can safely receive. */
8142 if (rsa
->actual_register_packet_size
== 0)
8143 rsa
->actual_register_packet_size
= buf_len
;
8145 /* If this is smaller than we guessed the 'g' packet would be,
8146 update our records. A 'g' reply that doesn't include a register's
8147 value implies either that the register is not available, or that
8148 the 'p' packet must be used. */
8149 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8151 long sizeof_g_packet
= buf_len
/ 2;
8153 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8155 long offset
= rsa
->regs
[i
].offset
;
8156 long reg_size
= register_size (gdbarch
, i
);
8158 if (rsa
->regs
[i
].pnum
== -1)
8161 if (offset
>= sizeof_g_packet
)
8162 rsa
->regs
[i
].in_g_packet
= 0;
8163 else if (offset
+ reg_size
> sizeof_g_packet
)
8164 error (_("Truncated register %d in remote 'g' packet"), i
);
8166 rsa
->regs
[i
].in_g_packet
= 1;
8169 /* Looks valid enough, we can assume this is the correct length
8170 for a 'g' packet. It's important not to adjust
8171 rsa->sizeof_g_packet if we have truncated registers otherwise
8172 this "if" won't be run the next time the method is called
8173 with a packet of the same size and one of the internal errors
8174 below will trigger instead. */
8175 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8178 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8180 /* Unimplemented registers read as all bits zero. */
8181 memset (regs
, 0, rsa
->sizeof_g_packet
);
8183 /* Reply describes registers byte by byte, each byte encoded as two
8184 hex characters. Suck them all up, then supply them to the
8185 register cacheing/storage mechanism. */
8187 p
= rs
->buf
.data ();
8188 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8190 if (p
[0] == 0 || p
[1] == 0)
8191 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8192 internal_error (__FILE__
, __LINE__
,
8193 _("unexpected end of 'g' packet reply"));
8195 if (p
[0] == 'x' && p
[1] == 'x')
8196 regs
[i
] = 0; /* 'x' */
8198 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8202 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8204 struct packet_reg
*r
= &rsa
->regs
[i
];
8205 long reg_size
= register_size (gdbarch
, i
);
8209 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8210 /* This shouldn't happen - we adjusted in_g_packet above. */
8211 internal_error (__FILE__
, __LINE__
,
8212 _("unexpected end of 'g' packet reply"));
8213 else if (rs
->buf
[r
->offset
* 2] == 'x')
8215 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8216 /* The register isn't available, mark it as such (at
8217 the same time setting the value to zero). */
8218 regcache
->raw_supply (r
->regnum
, NULL
);
8221 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8227 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8230 process_g_packet (regcache
);
8233 /* Make the remote selected traceframe match GDB's selected
8237 remote_target::set_remote_traceframe ()
8240 struct remote_state
*rs
= get_remote_state ();
8242 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8245 /* Avoid recursion, remote_trace_find calls us again. */
8246 rs
->remote_traceframe_number
= get_traceframe_number ();
8248 newnum
= target_trace_find (tfind_number
,
8249 get_traceframe_number (), 0, 0, NULL
);
8251 /* Should not happen. If it does, all bets are off. */
8252 if (newnum
!= get_traceframe_number ())
8253 warning (_("could not set remote traceframe"));
8257 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8259 struct gdbarch
*gdbarch
= regcache
->arch ();
8260 struct remote_state
*rs
= get_remote_state ();
8261 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8264 set_remote_traceframe ();
8265 set_general_thread (regcache
->ptid ());
8269 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8271 gdb_assert (reg
!= NULL
);
8273 /* If this register might be in the 'g' packet, try that first -
8274 we are likely to read more than one register. If this is the
8275 first 'g' packet, we might be overly optimistic about its
8276 contents, so fall back to 'p'. */
8277 if (reg
->in_g_packet
)
8279 fetch_registers_using_g (regcache
);
8280 if (reg
->in_g_packet
)
8284 if (fetch_register_using_p (regcache
, reg
))
8287 /* This register is not available. */
8288 regcache
->raw_supply (reg
->regnum
, NULL
);
8293 fetch_registers_using_g (regcache
);
8295 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8296 if (!rsa
->regs
[i
].in_g_packet
)
8297 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8299 /* This register is not available. */
8300 regcache
->raw_supply (i
, NULL
);
8304 /* Prepare to store registers. Since we may send them all (using a
8305 'G' request), we have to read out the ones we don't want to change
8309 remote_target::prepare_to_store (struct regcache
*regcache
)
8311 struct remote_state
*rs
= get_remote_state ();
8312 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8315 /* Make sure the entire registers array is valid. */
8316 switch (packet_support (PACKET_P
))
8318 case PACKET_DISABLE
:
8319 case PACKET_SUPPORT_UNKNOWN
:
8320 /* Make sure all the necessary registers are cached. */
8321 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8322 if (rsa
->regs
[i
].in_g_packet
)
8323 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8330 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8331 packet was not recognized. */
8334 remote_target::store_register_using_P (const struct regcache
*regcache
,
8337 struct gdbarch
*gdbarch
= regcache
->arch ();
8338 struct remote_state
*rs
= get_remote_state ();
8339 /* Try storing a single register. */
8340 char *buf
= rs
->buf
.data ();
8341 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8344 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8347 if (reg
->pnum
== -1)
8350 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8351 p
= buf
+ strlen (buf
);
8352 regcache
->raw_collect (reg
->regnum
, regp
);
8353 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8355 getpkt (&rs
->buf
, 0);
8357 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8362 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8363 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8364 case PACKET_UNKNOWN
:
8367 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8371 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8372 contents of the register cache buffer. FIXME: ignores errors. */
8375 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8377 struct remote_state
*rs
= get_remote_state ();
8378 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8382 /* Extract all the registers in the regcache copying them into a
8387 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8388 memset (regs
, 0, rsa
->sizeof_g_packet
);
8389 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8391 struct packet_reg
*r
= &rsa
->regs
[i
];
8394 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8398 /* Command describes registers byte by byte,
8399 each byte encoded as two hex characters. */
8400 p
= rs
->buf
.data ();
8402 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8404 getpkt (&rs
->buf
, 0);
8405 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8406 error (_("Could not write registers; remote failure reply '%s'"),
8410 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8411 of the register cache buffer. FIXME: ignores errors. */
8414 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8416 struct gdbarch
*gdbarch
= regcache
->arch ();
8417 struct remote_state
*rs
= get_remote_state ();
8418 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8421 set_remote_traceframe ();
8422 set_general_thread (regcache
->ptid ());
8426 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8428 gdb_assert (reg
!= NULL
);
8430 /* Always prefer to store registers using the 'P' packet if
8431 possible; we often change only a small number of registers.
8432 Sometimes we change a larger number; we'd need help from a
8433 higher layer to know to use 'G'. */
8434 if (store_register_using_P (regcache
, reg
))
8437 /* For now, don't complain if we have no way to write the
8438 register. GDB loses track of unavailable registers too
8439 easily. Some day, this may be an error. We don't have
8440 any way to read the register, either... */
8441 if (!reg
->in_g_packet
)
8444 store_registers_using_G (regcache
);
8448 store_registers_using_G (regcache
);
8450 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8451 if (!rsa
->regs
[i
].in_g_packet
)
8452 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8453 /* See above for why we do not issue an error here. */
8458 /* Return the number of hex digits in num. */
8461 hexnumlen (ULONGEST num
)
8465 for (i
= 0; num
!= 0; i
++)
8468 return std::max (i
, 1);
8471 /* Set BUF to the minimum number of hex digits representing NUM. */
8474 hexnumstr (char *buf
, ULONGEST num
)
8476 int len
= hexnumlen (num
);
8478 return hexnumnstr (buf
, num
, len
);
8482 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8485 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8491 for (i
= width
- 1; i
>= 0; i
--)
8493 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8500 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8503 remote_address_masked (CORE_ADDR addr
)
8505 unsigned int address_size
= remote_address_size
;
8507 /* If "remoteaddresssize" was not set, default to target address size. */
8509 address_size
= gdbarch_addr_bit (target_gdbarch ());
8511 if (address_size
> 0
8512 && address_size
< (sizeof (ULONGEST
) * 8))
8514 /* Only create a mask when that mask can safely be constructed
8515 in a ULONGEST variable. */
8518 mask
= (mask
<< address_size
) - 1;
8524 /* Determine whether the remote target supports binary downloading.
8525 This is accomplished by sending a no-op memory write of zero length
8526 to the target at the specified address. It does not suffice to send
8527 the whole packet, since many stubs strip the eighth bit and
8528 subsequently compute a wrong checksum, which causes real havoc with
8531 NOTE: This can still lose if the serial line is not eight-bit
8532 clean. In cases like this, the user should clear "remote
8536 remote_target::check_binary_download (CORE_ADDR addr
)
8538 struct remote_state
*rs
= get_remote_state ();
8540 switch (packet_support (PACKET_X
))
8542 case PACKET_DISABLE
:
8546 case PACKET_SUPPORT_UNKNOWN
:
8550 p
= rs
->buf
.data ();
8552 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8554 p
+= hexnumstr (p
, (ULONGEST
) 0);
8558 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8559 getpkt (&rs
->buf
, 0);
8561 if (rs
->buf
[0] == '\0')
8564 fprintf_unfiltered (gdb_stdlog
,
8565 "binary downloading NOT "
8566 "supported by target\n");
8567 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8572 fprintf_unfiltered (gdb_stdlog
,
8573 "binary downloading supported by target\n");
8574 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8581 /* Helper function to resize the payload in order to try to get a good
8582 alignment. We try to write an amount of data such that the next write will
8583 start on an address aligned on REMOTE_ALIGN_WRITES. */
8586 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8588 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8591 /* Write memory data directly to the remote machine.
8592 This does not inform the data cache; the data cache uses this.
8593 HEADER is the starting part of the packet.
8594 MEMADDR is the address in the remote memory space.
8595 MYADDR is the address of the buffer in our space.
8596 LEN_UNITS is the number of addressable units to write.
8597 UNIT_SIZE is the length in bytes of an addressable unit.
8598 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8599 should send data as binary ('X'), or hex-encoded ('M').
8601 The function creates packet of the form
8602 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8604 where encoding of <DATA> is terminated by PACKET_FORMAT.
8606 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8609 Return the transferred status, error or OK (an
8610 'enum target_xfer_status' value). Save the number of addressable units
8611 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8613 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8614 exchange between gdb and the stub could look like (?? in place of the
8620 -> $M1000,3:eeeeffffeeee#??
8624 <- eeeeffffeeeedddd */
8627 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8628 const gdb_byte
*myaddr
,
8631 ULONGEST
*xfered_len_units
,
8632 char packet_format
, int use_length
)
8634 struct remote_state
*rs
= get_remote_state ();
8640 int payload_capacity_bytes
;
8641 int payload_length_bytes
;
8643 if (packet_format
!= 'X' && packet_format
!= 'M')
8644 internal_error (__FILE__
, __LINE__
,
8645 _("remote_write_bytes_aux: bad packet format"));
8648 return TARGET_XFER_EOF
;
8650 payload_capacity_bytes
= get_memory_write_packet_size ();
8652 /* The packet buffer will be large enough for the payload;
8653 get_memory_packet_size ensures this. */
8656 /* Compute the size of the actual payload by subtracting out the
8657 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8659 payload_capacity_bytes
-= strlen ("$,:#NN");
8661 /* The comma won't be used. */
8662 payload_capacity_bytes
+= 1;
8663 payload_capacity_bytes
-= strlen (header
);
8664 payload_capacity_bytes
-= hexnumlen (memaddr
);
8666 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8668 strcat (rs
->buf
.data (), header
);
8669 p
= rs
->buf
.data () + strlen (header
);
8671 /* Compute a best guess of the number of bytes actually transfered. */
8672 if (packet_format
== 'X')
8674 /* Best guess at number of bytes that will fit. */
8675 todo_units
= std::min (len_units
,
8676 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8678 payload_capacity_bytes
-= hexnumlen (todo_units
);
8679 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8683 /* Number of bytes that will fit. */
8685 = std::min (len_units
,
8686 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8688 payload_capacity_bytes
-= hexnumlen (todo_units
);
8689 todo_units
= std::min (todo_units
,
8690 (payload_capacity_bytes
/ unit_size
) / 2);
8693 if (todo_units
<= 0)
8694 internal_error (__FILE__
, __LINE__
,
8695 _("minimum packet size too small to write data"));
8697 /* If we already need another packet, then try to align the end
8698 of this packet to a useful boundary. */
8699 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8700 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8702 /* Append "<memaddr>". */
8703 memaddr
= remote_address_masked (memaddr
);
8704 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8711 /* Append the length and retain its location and size. It may need to be
8712 adjusted once the packet body has been created. */
8714 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8722 /* Append the packet body. */
8723 if (packet_format
== 'X')
8725 /* Binary mode. Send target system values byte by byte, in
8726 increasing byte addresses. Only escape certain critical
8728 payload_length_bytes
=
8729 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8730 &units_written
, payload_capacity_bytes
);
8732 /* If not all TODO units fit, then we'll need another packet. Make
8733 a second try to keep the end of the packet aligned. Don't do
8734 this if the packet is tiny. */
8735 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8739 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8741 if (new_todo_units
!= units_written
)
8742 payload_length_bytes
=
8743 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8744 (gdb_byte
*) p
, &units_written
,
8745 payload_capacity_bytes
);
8748 p
+= payload_length_bytes
;
8749 if (use_length
&& units_written
< todo_units
)
8751 /* Escape chars have filled up the buffer prematurely,
8752 and we have actually sent fewer units than planned.
8753 Fix-up the length field of the packet. Use the same
8754 number of characters as before. */
8755 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8757 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8762 /* Normal mode: Send target system values byte by byte, in
8763 increasing byte addresses. Each byte is encoded as a two hex
8765 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8766 units_written
= todo_units
;
8769 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8770 getpkt (&rs
->buf
, 0);
8772 if (rs
->buf
[0] == 'E')
8773 return TARGET_XFER_E_IO
;
8775 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8776 send fewer units than we'd planned. */
8777 *xfered_len_units
= (ULONGEST
) units_written
;
8778 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8781 /* Write memory data directly to the remote machine.
8782 This does not inform the data cache; the data cache uses this.
8783 MEMADDR is the address in the remote memory space.
8784 MYADDR is the address of the buffer in our space.
8785 LEN is the number of bytes.
8787 Return the transferred status, error or OK (an
8788 'enum target_xfer_status' value). Save the number of bytes
8789 transferred in *XFERED_LEN. Only transfer a single packet. */
8792 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
8793 ULONGEST len
, int unit_size
,
8794 ULONGEST
*xfered_len
)
8796 const char *packet_format
= NULL
;
8798 /* Check whether the target supports binary download. */
8799 check_binary_download (memaddr
);
8801 switch (packet_support (PACKET_X
))
8804 packet_format
= "X";
8806 case PACKET_DISABLE
:
8807 packet_format
= "M";
8809 case PACKET_SUPPORT_UNKNOWN
:
8810 internal_error (__FILE__
, __LINE__
,
8811 _("remote_write_bytes: bad internal state"));
8813 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8816 return remote_write_bytes_aux (packet_format
,
8817 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8818 packet_format
[0], 1);
8821 /* Read memory data directly from the remote machine.
8822 This does not use the data cache; the data cache uses this.
8823 MEMADDR is the address in the remote memory space.
8824 MYADDR is the address of the buffer in our space.
8825 LEN_UNITS is the number of addressable memory units to read..
8826 UNIT_SIZE is the length in bytes of an addressable unit.
8828 Return the transferred status, error or OK (an
8829 'enum target_xfer_status' value). Save the number of bytes
8830 transferred in *XFERED_LEN_UNITS.
8832 See the comment of remote_write_bytes_aux for an example of
8833 memory read/write exchange between gdb and the stub. */
8836 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
8838 int unit_size
, ULONGEST
*xfered_len_units
)
8840 struct remote_state
*rs
= get_remote_state ();
8841 int buf_size_bytes
; /* Max size of packet output buffer. */
8846 buf_size_bytes
= get_memory_read_packet_size ();
8847 /* The packet buffer will be large enough for the payload;
8848 get_memory_packet_size ensures this. */
8850 /* Number of units that will fit. */
8851 todo_units
= std::min (len_units
,
8852 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8854 /* Construct "m"<memaddr>","<len>". */
8855 memaddr
= remote_address_masked (memaddr
);
8856 p
= rs
->buf
.data ();
8858 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8860 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8863 getpkt (&rs
->buf
, 0);
8864 if (rs
->buf
[0] == 'E'
8865 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8866 && rs
->buf
[3] == '\0')
8867 return TARGET_XFER_E_IO
;
8868 /* Reply describes memory byte by byte, each byte encoded as two hex
8870 p
= rs
->buf
.data ();
8871 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8872 /* Return what we have. Let higher layers handle partial reads. */
8873 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8874 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8877 /* Using the set of read-only target sections of remote, read live
8880 For interface/parameters/return description see target.h,
8884 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
8888 ULONGEST
*xfered_len
)
8890 struct target_section
*secp
;
8891 struct target_section_table
*table
;
8893 secp
= target_section_by_addr (this, memaddr
);
8895 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
8897 struct target_section
*p
;
8898 ULONGEST memend
= memaddr
+ len
;
8900 table
= target_get_section_table (this);
8902 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8904 if (memaddr
>= p
->addr
)
8906 if (memend
<= p
->endaddr
)
8908 /* Entire transfer is within this section. */
8909 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8912 else if (memaddr
>= p
->endaddr
)
8914 /* This section ends before the transfer starts. */
8919 /* This section overlaps the transfer. Just do half. */
8920 len
= p
->endaddr
- memaddr
;
8921 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8928 return TARGET_XFER_EOF
;
8931 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8932 first if the requested memory is unavailable in traceframe.
8933 Otherwise, fall back to remote_read_bytes_1. */
8936 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
8937 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8938 ULONGEST
*xfered_len
)
8941 return TARGET_XFER_EOF
;
8943 if (get_traceframe_number () != -1)
8945 std::vector
<mem_range
> available
;
8947 /* If we fail to get the set of available memory, then the
8948 target does not support querying traceframe info, and so we
8949 attempt reading from the traceframe anyway (assuming the
8950 target implements the old QTro packet then). */
8951 if (traceframe_available_memory (&available
, memaddr
, len
))
8953 if (available
.empty () || available
[0].start
!= memaddr
)
8955 enum target_xfer_status res
;
8957 /* Don't read into the traceframe's available
8959 if (!available
.empty ())
8961 LONGEST oldlen
= len
;
8963 len
= available
[0].start
- memaddr
;
8964 gdb_assert (len
<= oldlen
);
8967 /* This goes through the topmost target again. */
8968 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
8969 len
, unit_size
, xfered_len
);
8970 if (res
== TARGET_XFER_OK
)
8971 return TARGET_XFER_OK
;
8974 /* No use trying further, we know some memory starting
8975 at MEMADDR isn't available. */
8977 return (*xfered_len
!= 0) ?
8978 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8982 /* Don't try to read more than how much is available, in
8983 case the target implements the deprecated QTro packet to
8984 cater for older GDBs (the target's knowledge of read-only
8985 sections may be outdated by now). */
8986 len
= available
[0].length
;
8990 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8995 /* Sends a packet with content determined by the printf format string
8996 FORMAT and the remaining arguments, then gets the reply. Returns
8997 whether the packet was a success, a failure, or unknown. */
9000 remote_target::remote_send_printf (const char *format
, ...)
9002 struct remote_state
*rs
= get_remote_state ();
9003 int max_size
= get_remote_packet_size ();
9006 va_start (ap
, format
);
9009 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
9013 if (size
>= max_size
)
9014 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
9016 if (putpkt (rs
->buf
) < 0)
9017 error (_("Communication problem with target."));
9020 getpkt (&rs
->buf
, 0);
9022 return packet_check_result (rs
->buf
);
9025 /* Flash writing can take quite some time. We'll set
9026 effectively infinite timeout for flash operations.
9027 In future, we'll need to decide on a better approach. */
9028 static const int remote_flash_timeout
= 1000;
9031 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9033 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9034 enum packet_result ret
;
9035 scoped_restore restore_timeout
9036 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9038 ret
= remote_send_printf ("vFlashErase:%s,%s",
9039 phex (address
, addr_size
),
9043 case PACKET_UNKNOWN
:
9044 error (_("Remote target does not support flash erase"));
9046 error (_("Error erasing flash with vFlashErase packet"));
9053 remote_target::remote_flash_write (ULONGEST address
,
9054 ULONGEST length
, ULONGEST
*xfered_len
,
9055 const gdb_byte
*data
)
9057 scoped_restore restore_timeout
9058 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9059 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9064 remote_target::flash_done ()
9068 scoped_restore restore_timeout
9069 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9071 ret
= remote_send_printf ("vFlashDone");
9075 case PACKET_UNKNOWN
:
9076 error (_("Remote target does not support vFlashDone"));
9078 error (_("Error finishing flash operation"));
9085 remote_target::files_info ()
9087 puts_filtered ("Debugging a target over a serial line.\n");
9090 /* Stuff for dealing with the packets which are part of this protocol.
9091 See comment at top of file for details. */
9093 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9094 error to higher layers. Called when a serial error is detected.
9095 The exception message is STRING, followed by a colon and a blank,
9096 the system error message for errno at function entry and final dot
9097 for output compatibility with throw_perror_with_name. */
9100 unpush_and_perror (remote_target
*target
, const char *string
)
9102 int saved_errno
= errno
;
9104 remote_unpush_target (target
);
9105 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9106 safe_strerror (saved_errno
));
9109 /* Read a single character from the remote end. The current quit
9110 handler is overridden to avoid quitting in the middle of packet
9111 sequence, as that would break communication with the remote server.
9112 See remote_serial_quit_handler for more detail. */
9115 remote_target::readchar (int timeout
)
9118 struct remote_state
*rs
= get_remote_state ();
9121 scoped_restore restore_quit_target
9122 = make_scoped_restore (&curr_quit_handler_target
, this);
9123 scoped_restore restore_quit
9124 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9126 rs
->got_ctrlc_during_io
= 0;
9128 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9130 if (rs
->got_ctrlc_during_io
)
9137 switch ((enum serial_rc
) ch
)
9140 remote_unpush_target (this);
9141 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9144 unpush_and_perror (this, _("Remote communication error. "
9145 "Target disconnected."));
9147 case SERIAL_TIMEOUT
:
9153 /* Wrapper for serial_write that closes the target and throws if
9154 writing fails. The current quit handler is overridden to avoid
9155 quitting in the middle of packet sequence, as that would break
9156 communication with the remote server. See
9157 remote_serial_quit_handler for more detail. */
9160 remote_target::remote_serial_write (const char *str
, int len
)
9162 struct remote_state
*rs
= get_remote_state ();
9164 scoped_restore restore_quit_target
9165 = make_scoped_restore (&curr_quit_handler_target
, this);
9166 scoped_restore restore_quit
9167 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9169 rs
->got_ctrlc_during_io
= 0;
9171 if (serial_write (rs
->remote_desc
, str
, len
))
9173 unpush_and_perror (this, _("Remote communication error. "
9174 "Target disconnected."));
9177 if (rs
->got_ctrlc_during_io
)
9181 /* Return a string representing an escaped version of BUF, of len N.
9182 E.g. \n is converted to \\n, \t to \\t, etc. */
9185 escape_buffer (const char *buf
, int n
)
9189 stb
.putstrn (buf
, n
, '\\');
9190 return std::move (stb
.string ());
9193 /* Display a null-terminated packet on stdout, for debugging, using C
9197 print_packet (const char *buf
)
9199 puts_filtered ("\"");
9200 fputstr_filtered (buf
, '"', gdb_stdout
);
9201 puts_filtered ("\"");
9205 remote_target::putpkt (const char *buf
)
9207 return putpkt_binary (buf
, strlen (buf
));
9210 /* Wrapper around remote_target::putpkt to avoid exporting
9214 putpkt (remote_target
*remote
, const char *buf
)
9216 return remote
->putpkt (buf
);
9219 /* Send a packet to the remote machine, with error checking. The data
9220 of the packet is in BUF. The string in BUF can be at most
9221 get_remote_packet_size () - 5 to account for the $, # and checksum,
9222 and for a possible /0 if we are debugging (remote_debug) and want
9223 to print the sent packet as a string. */
9226 remote_target::putpkt_binary (const char *buf
, int cnt
)
9228 struct remote_state
*rs
= get_remote_state ();
9230 unsigned char csum
= 0;
9231 gdb::def_vector
<char> data (cnt
+ 6);
9232 char *buf2
= data
.data ();
9238 /* Catch cases like trying to read memory or listing threads while
9239 we're waiting for a stop reply. The remote server wouldn't be
9240 ready to handle this request, so we'd hang and timeout. We don't
9241 have to worry about this in synchronous mode, because in that
9242 case it's not possible to issue a command while the target is
9243 running. This is not a problem in non-stop mode, because in that
9244 case, the stub is always ready to process serial input. */
9245 if (!target_is_non_stop_p ()
9246 && target_is_async_p ()
9247 && rs
->waiting_for_stop_reply
)
9249 error (_("Cannot execute this command while the target is running.\n"
9250 "Use the \"interrupt\" command to stop the target\n"
9251 "and then try again."));
9254 /* We're sending out a new packet. Make sure we don't look at a
9255 stale cached response. */
9256 rs
->cached_wait_status
= 0;
9258 /* Copy the packet into buffer BUF2, encapsulating it
9259 and giving it a checksum. */
9264 for (i
= 0; i
< cnt
; i
++)
9270 *p
++ = tohex ((csum
>> 4) & 0xf);
9271 *p
++ = tohex (csum
& 0xf);
9273 /* Send it over and over until we get a positive ack. */
9277 int started_error_output
= 0;
9283 int len
= (int) (p
- buf2
);
9286 if (remote_packet_max_chars
< 0)
9289 max_chars
= remote_packet_max_chars
;
9292 = escape_buffer (buf2
, std::min (len
, max_chars
));
9294 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
9296 if (len
> max_chars
)
9297 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9300 fprintf_unfiltered (gdb_stdlog
, "...");
9302 gdb_flush (gdb_stdlog
);
9304 remote_serial_write (buf2
, p
- buf2
);
9306 /* If this is a no acks version of the remote protocol, send the
9307 packet and move on. */
9311 /* Read until either a timeout occurs (-2) or '+' is read.
9312 Handle any notification that arrives in the mean time. */
9315 ch
= readchar (remote_timeout
);
9323 case SERIAL_TIMEOUT
:
9326 if (started_error_output
)
9328 putchar_unfiltered ('\n');
9329 started_error_output
= 0;
9338 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
9342 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
9344 case SERIAL_TIMEOUT
:
9348 break; /* Retransmit buffer. */
9352 fprintf_unfiltered (gdb_stdlog
,
9353 "Packet instead of Ack, ignoring it\n");
9354 /* It's probably an old response sent because an ACK
9355 was lost. Gobble up the packet and ack it so it
9356 doesn't get retransmitted when we resend this
9359 remote_serial_write ("+", 1);
9360 continue; /* Now, go look for +. */
9367 /* If we got a notification, handle it, and go back to looking
9369 /* We've found the start of a notification. Now
9370 collect the data. */
9371 val
= read_frame (&rs
->buf
);
9376 std::string str
= escape_buffer (rs
->buf
.data (), val
);
9378 fprintf_unfiltered (gdb_stdlog
,
9379 " Notification received: %s\n",
9382 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9383 /* We're in sync now, rewait for the ack. */
9390 if (!started_error_output
)
9392 started_error_output
= 1;
9393 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9395 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9396 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
.data ());
9405 if (!started_error_output
)
9407 started_error_output
= 1;
9408 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9410 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9414 break; /* Here to retransmit. */
9418 /* This is wrong. If doing a long backtrace, the user should be
9419 able to get out next time we call QUIT, without anything as
9420 violent as interrupt_query. If we want to provide a way out of
9421 here without getting to the next QUIT, it should be based on
9422 hitting ^C twice as in remote_wait. */
9434 /* Come here after finding the start of a frame when we expected an
9435 ack. Do our best to discard the rest of this packet. */
9438 remote_target::skip_frame ()
9444 c
= readchar (remote_timeout
);
9447 case SERIAL_TIMEOUT
:
9448 /* Nothing we can do. */
9451 /* Discard the two bytes of checksum and stop. */
9452 c
= readchar (remote_timeout
);
9454 c
= readchar (remote_timeout
);
9457 case '*': /* Run length encoding. */
9458 /* Discard the repeat count. */
9459 c
= readchar (remote_timeout
);
9464 /* A regular character. */
9470 /* Come here after finding the start of the frame. Collect the rest
9471 into *BUF, verifying the checksum, length, and handling run-length
9472 compression. NUL terminate the buffer. If there is not enough room,
9475 Returns -1 on error, number of characters in buffer (ignoring the
9476 trailing NULL) on success. (could be extended to return one of the
9477 SERIAL status indications). */
9480 remote_target::read_frame (gdb::char_vector
*buf_p
)
9485 char *buf
= buf_p
->data ();
9486 struct remote_state
*rs
= get_remote_state ();
9493 c
= readchar (remote_timeout
);
9496 case SERIAL_TIMEOUT
:
9498 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
9502 fputs_filtered ("Saw new packet start in middle of old one\n",
9504 return -1; /* Start a new packet, count retries. */
9507 unsigned char pktcsum
;
9513 check_0
= readchar (remote_timeout
);
9515 check_1
= readchar (remote_timeout
);
9517 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9520 fputs_filtered ("Timeout in checksum, retrying\n",
9524 else if (check_0
< 0 || check_1
< 0)
9527 fputs_filtered ("Communication error in checksum\n",
9532 /* Don't recompute the checksum; with no ack packets we
9533 don't have any way to indicate a packet retransmission
9538 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9539 if (csum
== pktcsum
)
9544 std::string str
= escape_buffer (buf
, bc
);
9546 fprintf_unfiltered (gdb_stdlog
,
9547 "Bad checksum, sentsum=0x%x, "
9548 "csum=0x%x, buf=%s\n",
9549 pktcsum
, csum
, str
.c_str ());
9551 /* Number of characters in buffer ignoring trailing
9555 case '*': /* Run length encoding. */
9560 c
= readchar (remote_timeout
);
9562 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9564 /* The character before ``*'' is repeated. */
9566 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9568 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9570 /* Make some more room in the buffer. */
9571 buf_p
->resize (buf_p
->size () + repeat
);
9572 buf
= buf_p
->data ();
9575 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9581 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9585 if (bc
>= buf_p
->size () - 1)
9587 /* Make some more room in the buffer. */
9588 buf_p
->resize (buf_p
->size () * 2);
9589 buf
= buf_p
->data ();
9599 /* Set this to the maximum number of seconds to wait instead of waiting forever
9600 in target_wait(). If this timer times out, then it generates an error and
9601 the command is aborted. This replaces most of the need for timeouts in the
9602 GDB test suite, and makes it possible to distinguish between a hung target
9603 and one with slow communications. */
9605 static int watchdog
= 0;
9607 show_watchdog (struct ui_file
*file
, int from_tty
,
9608 struct cmd_list_element
*c
, const char *value
)
9610 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
9613 /* Read a packet from the remote machine, with error checking, and
9614 store it in *BUF. Resize *BUF if necessary to hold the result. If
9615 FOREVER, wait forever rather than timing out; this is used (in
9616 synchronous mode) to wait for a target that is is executing user
9618 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9619 don't have to change all the calls to getpkt to deal with the
9620 return value, because at the moment I don't know what the right
9621 thing to do it for those. */
9624 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9626 getpkt_sane (buf
, forever
);
9630 /* Read a packet from the remote machine, with error checking, and
9631 store it in *BUF. Resize *BUF if necessary to hold the result. If
9632 FOREVER, wait forever rather than timing out; this is used (in
9633 synchronous mode) to wait for a target that is is executing user
9634 code to stop. If FOREVER == 0, this function is allowed to time
9635 out gracefully and return an indication of this to the caller.
9636 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9637 consider receiving a notification enough reason to return to the
9638 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9639 holds a notification or not (a regular packet). */
9642 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9643 int forever
, int expecting_notif
,
9646 struct remote_state
*rs
= get_remote_state ();
9652 /* We're reading a new response. Make sure we don't look at a
9653 previously cached response. */
9654 rs
->cached_wait_status
= 0;
9656 strcpy (buf
->data (), "timeout");
9659 timeout
= watchdog
> 0 ? watchdog
: -1;
9660 else if (expecting_notif
)
9661 timeout
= 0; /* There should already be a char in the buffer. If
9664 timeout
= remote_timeout
;
9668 /* Process any number of notifications, and then return when
9672 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9674 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9676 /* This can loop forever if the remote side sends us
9677 characters continuously, but if it pauses, we'll get
9678 SERIAL_TIMEOUT from readchar because of timeout. Then
9679 we'll count that as a retry.
9681 Note that even when forever is set, we will only wait
9682 forever prior to the start of a packet. After that, we
9683 expect characters to arrive at a brisk pace. They should
9684 show up within remote_timeout intervals. */
9686 c
= readchar (timeout
);
9687 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9689 if (c
== SERIAL_TIMEOUT
)
9691 if (expecting_notif
)
9692 return -1; /* Don't complain, it's normal to not get
9693 anything in this case. */
9695 if (forever
) /* Watchdog went off? Kill the target. */
9697 remote_unpush_target (this);
9698 throw_error (TARGET_CLOSE_ERROR
,
9699 _("Watchdog timeout has expired. "
9700 "Target detached."));
9703 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9707 /* We've found the start of a packet or notification.
9708 Now collect the data. */
9709 val
= read_frame (buf
);
9714 remote_serial_write ("-", 1);
9717 if (tries
> MAX_TRIES
)
9719 /* We have tried hard enough, and just can't receive the
9720 packet/notification. Give up. */
9721 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9723 /* Skip the ack char if we're in no-ack mode. */
9724 if (!rs
->noack_mode
)
9725 remote_serial_write ("+", 1);
9729 /* If we got an ordinary packet, return that to our caller. */
9736 if (remote_packet_max_chars
< 0)
9739 max_chars
= remote_packet_max_chars
;
9742 = escape_buffer (buf
->data (),
9743 std::min (val
, max_chars
));
9745 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9748 if (val
> max_chars
)
9749 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9752 fprintf_unfiltered (gdb_stdlog
, "\n");
9755 /* Skip the ack char if we're in no-ack mode. */
9756 if (!rs
->noack_mode
)
9757 remote_serial_write ("+", 1);
9758 if (is_notif
!= NULL
)
9763 /* If we got a notification, handle it, and go back to looking
9767 gdb_assert (c
== '%');
9771 std::string str
= escape_buffer (buf
->data (), val
);
9773 fprintf_unfiltered (gdb_stdlog
,
9774 " Notification received: %s\n",
9777 if (is_notif
!= NULL
)
9780 handle_notification (rs
->notif_state
, buf
->data ());
9782 /* Notifications require no acknowledgement. */
9784 if (expecting_notif
)
9791 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
9793 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
9797 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
9800 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
9803 /* Kill any new fork children of process PID that haven't been
9804 processed by follow_fork. */
9807 remote_target::kill_new_fork_children (int pid
)
9809 remote_state
*rs
= get_remote_state ();
9810 struct notif_client
*notif
= ¬if_client_stop
;
9812 /* Kill the fork child threads of any threads in process PID
9813 that are stopped at a fork event. */
9814 for (thread_info
*thread
: all_non_exited_threads (this))
9816 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9818 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9820 int child_pid
= ws
->value
.related_pid
.pid ();
9823 res
= remote_vkill (child_pid
);
9825 error (_("Can't kill fork child process %d"), child_pid
);
9829 /* Check for any pending fork events (not reported or processed yet)
9830 in process PID and kill those fork child threads as well. */
9831 remote_notif_get_pending_events (notif
);
9832 for (auto &event
: rs
->stop_reply_queue
)
9833 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
9835 int child_pid
= event
->ws
.value
.related_pid
.pid ();
9838 res
= remote_vkill (child_pid
);
9840 error (_("Can't kill fork child process %d"), child_pid
);
9845 /* Target hook to kill the current inferior. */
9848 remote_target::kill ()
9851 int pid
= inferior_ptid
.pid ();
9852 struct remote_state
*rs
= get_remote_state ();
9854 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9856 /* If we're stopped while forking and we haven't followed yet,
9857 kill the child task. We need to do this before killing the
9858 parent task because if this is a vfork then the parent will
9860 kill_new_fork_children (pid
);
9862 res
= remote_vkill (pid
);
9865 target_mourn_inferior (inferior_ptid
);
9870 /* If we are in 'target remote' mode and we are killing the only
9871 inferior, then we will tell gdbserver to exit and unpush the
9873 if (res
== -1 && !remote_multi_process_p (rs
)
9874 && number_of_live_inferiors (this) == 1)
9878 /* We've killed the remote end, we get to mourn it. If we are
9879 not in extended mode, mourning the inferior also unpushes
9880 remote_ops from the target stack, which closes the remote
9882 target_mourn_inferior (inferior_ptid
);
9887 error (_("Can't kill process"));
9890 /* Send a kill request to the target using the 'vKill' packet. */
9893 remote_target::remote_vkill (int pid
)
9895 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9898 remote_state
*rs
= get_remote_state ();
9900 /* Tell the remote target to detach. */
9901 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
9903 getpkt (&rs
->buf
, 0);
9905 switch (packet_ok (rs
->buf
,
9906 &remote_protocol_packets
[PACKET_vKill
]))
9912 case PACKET_UNKNOWN
:
9915 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9919 /* Send a kill request to the target using the 'k' packet. */
9922 remote_target::remote_kill_k ()
9924 /* Catch errors so the user can quit from gdb even when we
9925 aren't on speaking terms with the remote system. */
9930 catch (const gdb_exception_error
&ex
)
9932 if (ex
.error
== TARGET_CLOSE_ERROR
)
9934 /* If we got an (EOF) error that caused the target
9935 to go away, then we're done, that's what we wanted.
9936 "k" is susceptible to cause a premature EOF, given
9937 that the remote server isn't actually required to
9938 reply to "k", and it can happen that it doesn't
9939 even get to reply ACK to the "k". */
9943 /* Otherwise, something went wrong. We didn't actually kill
9944 the target. Just propagate the exception, and let the
9945 user or higher layers decide what to do. */
9951 remote_target::mourn_inferior ()
9953 struct remote_state
*rs
= get_remote_state ();
9955 /* We're no longer interested in notification events of an inferior
9956 that exited or was killed/detached. */
9957 discard_pending_stop_replies (current_inferior ());
9959 /* In 'target remote' mode with one inferior, we close the connection. */
9960 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
9962 remote_unpush_target (this);
9966 /* In case we got here due to an error, but we're going to stay
9968 rs
->waiting_for_stop_reply
= 0;
9970 /* If the current general thread belonged to the process we just
9971 detached from or has exited, the remote side current general
9972 thread becomes undefined. Considering a case like this:
9974 - We just got here due to a detach.
9975 - The process that we're detaching from happens to immediately
9976 report a global breakpoint being hit in non-stop mode, in the
9977 same thread we had selected before.
9978 - GDB attaches to this process again.
9979 - This event happens to be the next event we handle.
9981 GDB would consider that the current general thread didn't need to
9982 be set on the stub side (with Hg), since for all it knew,
9983 GENERAL_THREAD hadn't changed.
9985 Notice that although in all-stop mode, the remote server always
9986 sets the current thread to the thread reporting the stop event,
9987 that doesn't happen in non-stop mode; in non-stop, the stub *must
9988 not* change the current thread when reporting a breakpoint hit,
9989 due to the decoupling of event reporting and event handling.
9991 To keep things simple, we always invalidate our notion of the
9993 record_currthread (rs
, minus_one_ptid
);
9995 /* Call common code to mark the inferior as not running. */
9996 generic_mourn_inferior ();
10000 extended_remote_target::supports_disable_randomization ()
10002 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
10006 remote_target::extended_remote_disable_randomization (int val
)
10008 struct remote_state
*rs
= get_remote_state ();
10011 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10012 "QDisableRandomization:%x", val
);
10014 reply
= remote_get_noisy_reply ();
10015 if (*reply
== '\0')
10016 error (_("Target does not support QDisableRandomization."));
10017 if (strcmp (reply
, "OK") != 0)
10018 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10022 remote_target::extended_remote_run (const std::string
&args
)
10024 struct remote_state
*rs
= get_remote_state ();
10026 const char *remote_exec_file
= get_remote_exec_file ();
10028 /* If the user has disabled vRun support, or we have detected that
10029 support is not available, do not try it. */
10030 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10033 strcpy (rs
->buf
.data (), "vRun;");
10034 len
= strlen (rs
->buf
.data ());
10036 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10037 error (_("Remote file name too long for run packet"));
10038 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10039 strlen (remote_exec_file
));
10041 if (!args
.empty ())
10045 gdb_argv
argv (args
.c_str ());
10046 for (i
= 0; argv
[i
] != NULL
; i
++)
10048 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10049 error (_("Argument list too long for run packet"));
10050 rs
->buf
[len
++] = ';';
10051 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10056 rs
->buf
[len
++] = '\0';
10059 getpkt (&rs
->buf
, 0);
10061 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10064 /* We have a wait response. All is well. */
10066 case PACKET_UNKNOWN
:
10069 if (remote_exec_file
[0] == '\0')
10070 error (_("Running the default executable on the remote target failed; "
10071 "try \"set remote exec-file\"?"));
10073 error (_("Running \"%s\" on the remote target failed"),
10076 gdb_assert_not_reached (_("bad switch"));
10080 /* Helper function to send set/unset environment packets. ACTION is
10081 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10082 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10086 remote_target::send_environment_packet (const char *action
,
10087 const char *packet
,
10090 remote_state
*rs
= get_remote_state ();
10092 /* Convert the environment variable to an hex string, which
10093 is the best format to be transmitted over the wire. */
10094 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10097 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10098 "%s:%s", packet
, encoded_value
.c_str ());
10101 getpkt (&rs
->buf
, 0);
10102 if (strcmp (rs
->buf
.data (), "OK") != 0)
10103 warning (_("Unable to %s environment variable '%s' on remote."),
10107 /* Helper function to handle the QEnvironment* packets. */
10110 remote_target::extended_remote_environment_support ()
10112 remote_state
*rs
= get_remote_state ();
10114 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10116 putpkt ("QEnvironmentReset");
10117 getpkt (&rs
->buf
, 0);
10118 if (strcmp (rs
->buf
.data (), "OK") != 0)
10119 warning (_("Unable to reset environment on remote."));
10122 gdb_environ
*e
= ¤t_inferior ()->environment
;
10124 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10125 for (const std::string
&el
: e
->user_set_env ())
10126 send_environment_packet ("set", "QEnvironmentHexEncoded",
10129 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10130 for (const std::string
&el
: e
->user_unset_env ())
10131 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10134 /* Helper function to set the current working directory for the
10135 inferior in the remote target. */
10138 remote_target::extended_remote_set_inferior_cwd ()
10140 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10142 const char *inferior_cwd
= get_inferior_cwd ();
10143 remote_state
*rs
= get_remote_state ();
10145 if (inferior_cwd
!= NULL
)
10147 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10148 strlen (inferior_cwd
));
10150 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10151 "QSetWorkingDir:%s", hexpath
.c_str ());
10155 /* An empty inferior_cwd means that the user wants us to
10156 reset the remote server's inferior's cwd. */
10157 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10158 "QSetWorkingDir:");
10162 getpkt (&rs
->buf
, 0);
10163 if (packet_ok (rs
->buf
,
10164 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10167 Remote replied unexpectedly while setting the inferior's working\n\
10174 /* In the extended protocol we want to be able to do things like
10175 "run" and have them basically work as expected. So we need
10176 a special create_inferior function. We support changing the
10177 executable file and the command line arguments, but not the
10181 extended_remote_target::create_inferior (const char *exec_file
,
10182 const std::string
&args
,
10183 char **env
, int from_tty
)
10187 struct remote_state
*rs
= get_remote_state ();
10188 const char *remote_exec_file
= get_remote_exec_file ();
10190 /* If running asynchronously, register the target file descriptor
10191 with the event loop. */
10192 if (target_can_async_p ())
10195 /* Disable address space randomization if requested (and supported). */
10196 if (supports_disable_randomization ())
10197 extended_remote_disable_randomization (disable_randomization
);
10199 /* If startup-with-shell is on, we inform gdbserver to start the
10200 remote inferior using a shell. */
10201 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10203 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10204 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10206 getpkt (&rs
->buf
, 0);
10207 if (strcmp (rs
->buf
.data (), "OK") != 0)
10209 Remote replied unexpectedly while setting startup-with-shell: %s"),
10213 extended_remote_environment_support ();
10215 extended_remote_set_inferior_cwd ();
10217 /* Now restart the remote server. */
10218 run_worked
= extended_remote_run (args
) != -1;
10221 /* vRun was not supported. Fail if we need it to do what the
10223 if (remote_exec_file
[0])
10224 error (_("Remote target does not support \"set remote exec-file\""));
10225 if (!args
.empty ())
10226 error (_("Remote target does not support \"set args\" or run ARGS"));
10228 /* Fall back to "R". */
10229 extended_remote_restart ();
10232 /* vRun's success return is a stop reply. */
10233 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10234 add_current_inferior_and_thread (stop_reply
);
10236 /* Get updated offsets, if the stub uses qOffsets. */
10241 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10242 the list of conditions (in agent expression bytecode format), if any, the
10243 target needs to evaluate. The output is placed into the packet buffer
10244 started from BUF and ended at BUF_END. */
10247 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10248 struct bp_target_info
*bp_tgt
, char *buf
,
10251 if (bp_tgt
->conditions
.empty ())
10254 buf
+= strlen (buf
);
10255 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10258 /* Send conditions to the target. */
10259 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10261 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10262 buf
+= strlen (buf
);
10263 for (int i
= 0; i
< aexpr
->len
; ++i
)
10264 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10271 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10272 struct bp_target_info
*bp_tgt
, char *buf
)
10274 if (bp_tgt
->tcommands
.empty ())
10277 buf
+= strlen (buf
);
10279 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10280 buf
+= strlen (buf
);
10282 /* Concatenate all the agent expressions that are commands into the
10284 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10286 sprintf (buf
, "X%x,", aexpr
->len
);
10287 buf
+= strlen (buf
);
10288 for (int i
= 0; i
< aexpr
->len
; ++i
)
10289 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10294 /* Insert a breakpoint. On targets that have software breakpoint
10295 support, we ask the remote target to do the work; on targets
10296 which don't, we insert a traditional memory breakpoint. */
10299 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10300 struct bp_target_info
*bp_tgt
)
10302 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10303 If it succeeds, then set the support to PACKET_ENABLE. If it
10304 fails, and the user has explicitly requested the Z support then
10305 report an error, otherwise, mark it disabled and go on. */
10307 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10309 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10310 struct remote_state
*rs
;
10313 /* Make sure the remote is pointing at the right process, if
10315 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10316 set_general_process ();
10318 rs
= get_remote_state ();
10319 p
= rs
->buf
.data ();
10320 endbuf
= p
+ get_remote_packet_size ();
10325 addr
= (ULONGEST
) remote_address_masked (addr
);
10326 p
+= hexnumstr (p
, addr
);
10327 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10329 if (supports_evaluation_of_breakpoint_conditions ())
10330 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10332 if (can_run_breakpoint_commands ())
10333 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10336 getpkt (&rs
->buf
, 0);
10338 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10344 case PACKET_UNKNOWN
:
10349 /* If this breakpoint has target-side commands but this stub doesn't
10350 support Z0 packets, throw error. */
10351 if (!bp_tgt
->tcommands
.empty ())
10352 throw_error (NOT_SUPPORTED_ERROR
, _("\
10353 Target doesn't support breakpoints that have target side commands."));
10355 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10359 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10360 struct bp_target_info
*bp_tgt
,
10361 enum remove_bp_reason reason
)
10363 CORE_ADDR addr
= bp_tgt
->placed_address
;
10364 struct remote_state
*rs
= get_remote_state ();
10366 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10368 char *p
= rs
->buf
.data ();
10369 char *endbuf
= p
+ get_remote_packet_size ();
10371 /* Make sure the remote is pointing at the right process, if
10373 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10374 set_general_process ();
10380 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10381 p
+= hexnumstr (p
, addr
);
10382 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10385 getpkt (&rs
->buf
, 0);
10387 return (rs
->buf
[0] == 'E');
10390 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10393 static enum Z_packet_type
10394 watchpoint_to_Z_packet (int type
)
10399 return Z_PACKET_WRITE_WP
;
10402 return Z_PACKET_READ_WP
;
10405 return Z_PACKET_ACCESS_WP
;
10408 internal_error (__FILE__
, __LINE__
,
10409 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10414 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10415 enum target_hw_bp_type type
, struct expression
*cond
)
10417 struct remote_state
*rs
= get_remote_state ();
10418 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10420 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10422 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10425 /* Make sure the remote is pointing at the right process, if
10427 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10428 set_general_process ();
10430 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10431 p
= strchr (rs
->buf
.data (), '\0');
10432 addr
= remote_address_masked (addr
);
10433 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10434 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10437 getpkt (&rs
->buf
, 0);
10439 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10443 case PACKET_UNKNOWN
:
10448 internal_error (__FILE__
, __LINE__
,
10449 _("remote_insert_watchpoint: reached end of function"));
10453 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10454 CORE_ADDR start
, int length
)
10456 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10458 return diff
< length
;
10463 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10464 enum target_hw_bp_type type
, struct expression
*cond
)
10466 struct remote_state
*rs
= get_remote_state ();
10467 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10469 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10471 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10474 /* Make sure the remote is pointing at the right process, if
10476 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10477 set_general_process ();
10479 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10480 p
= strchr (rs
->buf
.data (), '\0');
10481 addr
= remote_address_masked (addr
);
10482 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10483 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10485 getpkt (&rs
->buf
, 0);
10487 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10490 case PACKET_UNKNOWN
:
10495 internal_error (__FILE__
, __LINE__
,
10496 _("remote_remove_watchpoint: reached end of function"));
10500 static int remote_hw_watchpoint_limit
= -1;
10501 static int remote_hw_watchpoint_length_limit
= -1;
10502 static int remote_hw_breakpoint_limit
= -1;
10505 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10507 if (remote_hw_watchpoint_length_limit
== 0)
10509 else if (remote_hw_watchpoint_length_limit
< 0)
10511 else if (len
<= remote_hw_watchpoint_length_limit
)
10518 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10520 if (type
== bp_hardware_breakpoint
)
10522 if (remote_hw_breakpoint_limit
== 0)
10524 else if (remote_hw_breakpoint_limit
< 0)
10526 else if (cnt
<= remote_hw_breakpoint_limit
)
10531 if (remote_hw_watchpoint_limit
== 0)
10533 else if (remote_hw_watchpoint_limit
< 0)
10537 else if (cnt
<= remote_hw_watchpoint_limit
)
10543 /* The to_stopped_by_sw_breakpoint method of target remote. */
10546 remote_target::stopped_by_sw_breakpoint ()
10548 struct thread_info
*thread
= inferior_thread ();
10550 return (thread
->priv
!= NULL
10551 && (get_remote_thread_info (thread
)->stop_reason
10552 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10555 /* The to_supports_stopped_by_sw_breakpoint method of target
10559 remote_target::supports_stopped_by_sw_breakpoint ()
10561 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10564 /* The to_stopped_by_hw_breakpoint method of target remote. */
10567 remote_target::stopped_by_hw_breakpoint ()
10569 struct thread_info
*thread
= inferior_thread ();
10571 return (thread
->priv
!= NULL
10572 && (get_remote_thread_info (thread
)->stop_reason
10573 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10576 /* The to_supports_stopped_by_hw_breakpoint method of target
10580 remote_target::supports_stopped_by_hw_breakpoint ()
10582 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10586 remote_target::stopped_by_watchpoint ()
10588 struct thread_info
*thread
= inferior_thread ();
10590 return (thread
->priv
!= NULL
10591 && (get_remote_thread_info (thread
)->stop_reason
10592 == TARGET_STOPPED_BY_WATCHPOINT
));
10596 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10598 struct thread_info
*thread
= inferior_thread ();
10600 if (thread
->priv
!= NULL
10601 && (get_remote_thread_info (thread
)->stop_reason
10602 == TARGET_STOPPED_BY_WATCHPOINT
))
10604 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10613 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10614 struct bp_target_info
*bp_tgt
)
10616 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10617 struct remote_state
*rs
;
10621 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10624 /* Make sure the remote is pointing at the right process, if
10626 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10627 set_general_process ();
10629 rs
= get_remote_state ();
10630 p
= rs
->buf
.data ();
10631 endbuf
= p
+ get_remote_packet_size ();
10637 addr
= remote_address_masked (addr
);
10638 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10639 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10641 if (supports_evaluation_of_breakpoint_conditions ())
10642 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10644 if (can_run_breakpoint_commands ())
10645 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10648 getpkt (&rs
->buf
, 0);
10650 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10653 if (rs
->buf
[1] == '.')
10655 message
= strchr (&rs
->buf
[2], '.');
10657 error (_("Remote failure reply: %s"), message
+ 1);
10660 case PACKET_UNKNOWN
:
10665 internal_error (__FILE__
, __LINE__
,
10666 _("remote_insert_hw_breakpoint: reached end of function"));
10671 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10672 struct bp_target_info
*bp_tgt
)
10675 struct remote_state
*rs
= get_remote_state ();
10676 char *p
= rs
->buf
.data ();
10677 char *endbuf
= p
+ get_remote_packet_size ();
10679 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10682 /* Make sure the remote is pointing at the right process, if
10684 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10685 set_general_process ();
10691 addr
= remote_address_masked (bp_tgt
->placed_address
);
10692 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10693 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10696 getpkt (&rs
->buf
, 0);
10698 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10701 case PACKET_UNKNOWN
:
10706 internal_error (__FILE__
, __LINE__
,
10707 _("remote_remove_hw_breakpoint: reached end of function"));
10710 /* Verify memory using the "qCRC:" request. */
10713 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10715 struct remote_state
*rs
= get_remote_state ();
10716 unsigned long host_crc
, target_crc
;
10719 /* It doesn't make sense to use qCRC if the remote target is
10720 connected but not running. */
10721 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10723 enum packet_result result
;
10725 /* Make sure the remote is pointing at the right process. */
10726 set_general_process ();
10728 /* FIXME: assumes lma can fit into long. */
10729 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10730 (long) lma
, (long) size
);
10733 /* Be clever; compute the host_crc before waiting for target
10735 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10737 getpkt (&rs
->buf
, 0);
10739 result
= packet_ok (rs
->buf
,
10740 &remote_protocol_packets
[PACKET_qCRC
]);
10741 if (result
== PACKET_ERROR
)
10743 else if (result
== PACKET_OK
)
10745 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10746 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10748 return (host_crc
== target_crc
);
10752 return simple_verify_memory (this, data
, lma
, size
);
10755 /* compare-sections command
10757 With no arguments, compares each loadable section in the exec bfd
10758 with the same memory range on the target, and reports mismatches.
10759 Useful for verifying the image on the target against the exec file. */
10762 compare_sections_command (const char *args
, int from_tty
)
10765 const char *sectname
;
10766 bfd_size_type size
;
10769 int mismatched
= 0;
10774 error (_("command cannot be used without an exec file"));
10776 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10782 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10784 if (!(s
->flags
& SEC_LOAD
))
10785 continue; /* Skip non-loadable section. */
10787 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10788 continue; /* Skip writeable sections */
10790 size
= bfd_section_size (s
);
10792 continue; /* Skip zero-length section. */
10794 sectname
= bfd_section_name (s
);
10795 if (args
&& strcmp (args
, sectname
) != 0)
10796 continue; /* Not the section selected by user. */
10798 matched
= 1; /* Do this section. */
10801 gdb::byte_vector
sectdata (size
);
10802 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10804 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10807 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10808 paddress (target_gdbarch (), lma
),
10809 paddress (target_gdbarch (), lma
+ size
));
10811 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10812 paddress (target_gdbarch (), lma
),
10813 paddress (target_gdbarch (), lma
+ size
));
10815 printf_filtered ("matched.\n");
10818 printf_filtered ("MIS-MATCHED!\n");
10822 if (mismatched
> 0)
10823 warning (_("One or more sections of the target image does not match\n\
10824 the loaded file\n"));
10825 if (args
&& !matched
)
10826 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10829 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10830 into remote target. The number of bytes written to the remote
10831 target is returned, or -1 for error. */
10834 remote_target::remote_write_qxfer (const char *object_name
,
10835 const char *annex
, const gdb_byte
*writebuf
,
10836 ULONGEST offset
, LONGEST len
,
10837 ULONGEST
*xfered_len
,
10838 struct packet_config
*packet
)
10842 struct remote_state
*rs
= get_remote_state ();
10843 int max_size
= get_memory_write_packet_size ();
10845 if (packet_config_support (packet
) == PACKET_DISABLE
)
10846 return TARGET_XFER_E_IO
;
10848 /* Insert header. */
10849 i
= snprintf (rs
->buf
.data (), max_size
,
10850 "qXfer:%s:write:%s:%s:",
10851 object_name
, annex
? annex
: "",
10852 phex_nz (offset
, sizeof offset
));
10853 max_size
-= (i
+ 1);
10855 /* Escape as much data as fits into rs->buf. */
10856 buf_len
= remote_escape_output
10857 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
10859 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
10860 || getpkt_sane (&rs
->buf
, 0) < 0
10861 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10862 return TARGET_XFER_E_IO
;
10864 unpack_varlen_hex (rs
->buf
.data (), &n
);
10867 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10870 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10871 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10872 number of bytes read is returned, or 0 for EOF, or -1 for error.
10873 The number of bytes read may be less than LEN without indicating an
10874 EOF. PACKET is checked and updated to indicate whether the remote
10875 target supports this object. */
10878 remote_target::remote_read_qxfer (const char *object_name
,
10880 gdb_byte
*readbuf
, ULONGEST offset
,
10882 ULONGEST
*xfered_len
,
10883 struct packet_config
*packet
)
10885 struct remote_state
*rs
= get_remote_state ();
10886 LONGEST i
, n
, packet_len
;
10888 if (packet_config_support (packet
) == PACKET_DISABLE
)
10889 return TARGET_XFER_E_IO
;
10891 /* Check whether we've cached an end-of-object packet that matches
10893 if (rs
->finished_object
)
10895 if (strcmp (object_name
, rs
->finished_object
) == 0
10896 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10897 && offset
== rs
->finished_offset
)
10898 return TARGET_XFER_EOF
;
10901 /* Otherwise, we're now reading something different. Discard
10903 xfree (rs
->finished_object
);
10904 xfree (rs
->finished_annex
);
10905 rs
->finished_object
= NULL
;
10906 rs
->finished_annex
= NULL
;
10909 /* Request only enough to fit in a single packet. The actual data
10910 may not, since we don't know how much of it will need to be escaped;
10911 the target is free to respond with slightly less data. We subtract
10912 five to account for the response type and the protocol frame. */
10913 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10914 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
10915 "qXfer:%s:read:%s:%s,%s",
10916 object_name
, annex
? annex
: "",
10917 phex_nz (offset
, sizeof offset
),
10918 phex_nz (n
, sizeof n
));
10919 i
= putpkt (rs
->buf
);
10921 return TARGET_XFER_E_IO
;
10924 packet_len
= getpkt_sane (&rs
->buf
, 0);
10925 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10926 return TARGET_XFER_E_IO
;
10928 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10929 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
10931 /* 'm' means there is (or at least might be) more data after this
10932 batch. That does not make sense unless there's at least one byte
10933 of data in this reply. */
10934 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10935 error (_("Remote qXfer reply contained no data."));
10937 /* Got some data. */
10938 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
10939 packet_len
- 1, readbuf
, n
);
10941 /* 'l' is an EOF marker, possibly including a final block of data,
10942 or possibly empty. If we have the final block of a non-empty
10943 object, record this fact to bypass a subsequent partial read. */
10944 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10946 rs
->finished_object
= xstrdup (object_name
);
10947 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10948 rs
->finished_offset
= offset
+ i
;
10952 return TARGET_XFER_EOF
;
10956 return TARGET_XFER_OK
;
10960 enum target_xfer_status
10961 remote_target::xfer_partial (enum target_object object
,
10962 const char *annex
, gdb_byte
*readbuf
,
10963 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10964 ULONGEST
*xfered_len
)
10966 struct remote_state
*rs
;
10970 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10972 set_remote_traceframe ();
10973 set_general_thread (inferior_ptid
);
10975 rs
= get_remote_state ();
10977 /* Handle memory using the standard memory routines. */
10978 if (object
== TARGET_OBJECT_MEMORY
)
10980 /* If the remote target is connected but not running, we should
10981 pass this request down to a lower stratum (e.g. the executable
10983 if (!target_has_execution
)
10984 return TARGET_XFER_EOF
;
10986 if (writebuf
!= NULL
)
10987 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10990 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
10994 /* Handle extra signal info using qxfer packets. */
10995 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10998 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
10999 xfered_len
, &remote_protocol_packets
11000 [PACKET_qXfer_siginfo_read
]);
11002 return remote_write_qxfer ("siginfo", annex
,
11003 writebuf
, offset
, len
, xfered_len
,
11004 &remote_protocol_packets
11005 [PACKET_qXfer_siginfo_write
]);
11008 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
11011 return remote_read_qxfer ("statictrace", annex
,
11012 readbuf
, offset
, len
, xfered_len
,
11013 &remote_protocol_packets
11014 [PACKET_qXfer_statictrace_read
]);
11016 return TARGET_XFER_E_IO
;
11019 /* Only handle flash writes. */
11020 if (writebuf
!= NULL
)
11024 case TARGET_OBJECT_FLASH
:
11025 return remote_flash_write (offset
, len
, xfered_len
,
11029 return TARGET_XFER_E_IO
;
11033 /* Map pre-existing objects onto letters. DO NOT do this for new
11034 objects!!! Instead specify new query packets. */
11037 case TARGET_OBJECT_AVR
:
11041 case TARGET_OBJECT_AUXV
:
11042 gdb_assert (annex
== NULL
);
11043 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
11045 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
11047 case TARGET_OBJECT_AVAILABLE_FEATURES
:
11048 return remote_read_qxfer
11049 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
11050 &remote_protocol_packets
[PACKET_qXfer_features
]);
11052 case TARGET_OBJECT_LIBRARIES
:
11053 return remote_read_qxfer
11054 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
11055 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
11057 case TARGET_OBJECT_LIBRARIES_SVR4
:
11058 return remote_read_qxfer
11059 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
11060 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
11062 case TARGET_OBJECT_MEMORY_MAP
:
11063 gdb_assert (annex
== NULL
);
11064 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
11066 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
11068 case TARGET_OBJECT_OSDATA
:
11069 /* Should only get here if we're connected. */
11070 gdb_assert (rs
->remote_desc
);
11071 return remote_read_qxfer
11072 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
11073 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
11075 case TARGET_OBJECT_THREADS
:
11076 gdb_assert (annex
== NULL
);
11077 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
11079 &remote_protocol_packets
[PACKET_qXfer_threads
]);
11081 case TARGET_OBJECT_TRACEFRAME_INFO
:
11082 gdb_assert (annex
== NULL
);
11083 return remote_read_qxfer
11084 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11085 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11087 case TARGET_OBJECT_FDPIC
:
11088 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11090 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11092 case TARGET_OBJECT_OPENVMS_UIB
:
11093 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11095 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11097 case TARGET_OBJECT_BTRACE
:
11098 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11100 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11102 case TARGET_OBJECT_BTRACE_CONF
:
11103 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11105 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11107 case TARGET_OBJECT_EXEC_FILE
:
11108 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11110 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11113 return TARGET_XFER_E_IO
;
11116 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11117 large enough let the caller deal with it. */
11118 if (len
< get_remote_packet_size ())
11119 return TARGET_XFER_E_IO
;
11120 len
= get_remote_packet_size ();
11122 /* Except for querying the minimum buffer size, target must be open. */
11123 if (!rs
->remote_desc
)
11124 error (_("remote query is only available after target open"));
11126 gdb_assert (annex
!= NULL
);
11127 gdb_assert (readbuf
!= NULL
);
11129 p2
= rs
->buf
.data ();
11131 *p2
++ = query_type
;
11133 /* We used one buffer char for the remote protocol q command and
11134 another for the query type. As the remote protocol encapsulation
11135 uses 4 chars plus one extra in case we are debugging
11136 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11139 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11141 /* Bad caller may have sent forbidden characters. */
11142 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11147 gdb_assert (annex
[i
] == '\0');
11149 i
= putpkt (rs
->buf
);
11151 return TARGET_XFER_E_IO
;
11153 getpkt (&rs
->buf
, 0);
11154 strcpy ((char *) readbuf
, rs
->buf
.data ());
11156 *xfered_len
= strlen ((char *) readbuf
);
11157 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11160 /* Implementation of to_get_memory_xfer_limit. */
11163 remote_target::get_memory_xfer_limit ()
11165 return get_memory_write_packet_size ();
11169 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11170 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11171 CORE_ADDR
*found_addrp
)
11173 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11174 struct remote_state
*rs
= get_remote_state ();
11175 int max_size
= get_memory_write_packet_size ();
11176 struct packet_config
*packet
=
11177 &remote_protocol_packets
[PACKET_qSearch_memory
];
11178 /* Number of packet bytes used to encode the pattern;
11179 this could be more than PATTERN_LEN due to escape characters. */
11180 int escaped_pattern_len
;
11181 /* Amount of pattern that was encodable in the packet. */
11182 int used_pattern_len
;
11185 ULONGEST found_addr
;
11187 /* Don't go to the target if we don't have to. This is done before
11188 checking packet_config_support to avoid the possibility that a
11189 success for this edge case means the facility works in
11191 if (pattern_len
> search_space_len
)
11193 if (pattern_len
== 0)
11195 *found_addrp
= start_addr
;
11199 /* If we already know the packet isn't supported, fall back to the simple
11200 way of searching memory. */
11202 if (packet_config_support (packet
) == PACKET_DISABLE
)
11204 /* Target doesn't provided special support, fall back and use the
11205 standard support (copy memory and do the search here). */
11206 return simple_search_memory (this, start_addr
, search_space_len
,
11207 pattern
, pattern_len
, found_addrp
);
11210 /* Make sure the remote is pointing at the right process. */
11211 set_general_process ();
11213 /* Insert header. */
11214 i
= snprintf (rs
->buf
.data (), max_size
,
11215 "qSearch:memory:%s;%s;",
11216 phex_nz (start_addr
, addr_size
),
11217 phex_nz (search_space_len
, sizeof (search_space_len
)));
11218 max_size
-= (i
+ 1);
11220 /* Escape as much data as fits into rs->buf. */
11221 escaped_pattern_len
=
11222 remote_escape_output (pattern
, pattern_len
, 1,
11223 (gdb_byte
*) rs
->buf
.data () + i
,
11224 &used_pattern_len
, max_size
);
11226 /* Bail if the pattern is too large. */
11227 if (used_pattern_len
!= pattern_len
)
11228 error (_("Pattern is too large to transmit to remote target."));
11230 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11231 || getpkt_sane (&rs
->buf
, 0) < 0
11232 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11234 /* The request may not have worked because the command is not
11235 supported. If so, fall back to the simple way. */
11236 if (packet_config_support (packet
) == PACKET_DISABLE
)
11238 return simple_search_memory (this, start_addr
, search_space_len
,
11239 pattern
, pattern_len
, found_addrp
);
11244 if (rs
->buf
[0] == '0')
11246 else if (rs
->buf
[0] == '1')
11249 if (rs
->buf
[1] != ',')
11250 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11251 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11252 *found_addrp
= found_addr
;
11255 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11261 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11263 struct remote_state
*rs
= get_remote_state ();
11264 char *p
= rs
->buf
.data ();
11266 if (!rs
->remote_desc
)
11267 error (_("remote rcmd is only available after target open"));
11269 /* Send a NULL command across as an empty command. */
11270 if (command
== NULL
)
11273 /* The query prefix. */
11274 strcpy (rs
->buf
.data (), "qRcmd,");
11275 p
= strchr (rs
->buf
.data (), '\0');
11277 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11278 > get_remote_packet_size ())
11279 error (_("\"monitor\" command ``%s'' is too long."), command
);
11281 /* Encode the actual command. */
11282 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11284 if (putpkt (rs
->buf
) < 0)
11285 error (_("Communication problem with target."));
11287 /* get/display the response */
11292 /* XXX - see also remote_get_noisy_reply(). */
11293 QUIT
; /* Allow user to bail out with ^C. */
11295 if (getpkt_sane (&rs
->buf
, 0) == -1)
11297 /* Timeout. Continue to (try to) read responses.
11298 This is better than stopping with an error, assuming the stub
11299 is still executing the (long) monitor command.
11300 If needed, the user can interrupt gdb using C-c, obtaining
11301 an effect similar to stop on timeout. */
11304 buf
= rs
->buf
.data ();
11305 if (buf
[0] == '\0')
11306 error (_("Target does not support this command."));
11307 if (buf
[0] == 'O' && buf
[1] != 'K')
11309 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11312 if (strcmp (buf
, "OK") == 0)
11314 if (strlen (buf
) == 3 && buf
[0] == 'E'
11315 && isdigit (buf
[1]) && isdigit (buf
[2]))
11317 error (_("Protocol error with Rcmd"));
11319 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11321 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11323 fputc_unfiltered (c
, outbuf
);
11329 std::vector
<mem_region
>
11330 remote_target::memory_map ()
11332 std::vector
<mem_region
> result
;
11333 gdb::optional
<gdb::char_vector
> text
11334 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP
, NULL
);
11337 result
= parse_memory_map (text
->data ());
11343 packet_command (const char *args
, int from_tty
)
11345 remote_target
*remote
= get_current_remote_target ();
11347 if (remote
== nullptr)
11348 error (_("command can only be used with remote target"));
11350 remote
->packet_command (args
, from_tty
);
11354 remote_target::packet_command (const char *args
, int from_tty
)
11357 error (_("remote-packet command requires packet text as argument"));
11359 puts_filtered ("sending: ");
11360 print_packet (args
);
11361 puts_filtered ("\n");
11364 remote_state
*rs
= get_remote_state ();
11366 getpkt (&rs
->buf
, 0);
11367 puts_filtered ("received: ");
11368 print_packet (rs
->buf
.data ());
11369 puts_filtered ("\n");
11373 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11375 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11377 static void threadset_test_cmd (char *cmd
, int tty
);
11379 static void threadalive_test (char *cmd
, int tty
);
11381 static void threadlist_test_cmd (char *cmd
, int tty
);
11383 int get_and_display_threadinfo (threadref
*ref
);
11385 static void threadinfo_test_cmd (char *cmd
, int tty
);
11387 static int thread_display_step (threadref
*ref
, void *context
);
11389 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11391 static void init_remote_threadtests (void);
11393 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11396 threadset_test_cmd (const char *cmd
, int tty
)
11398 int sample_thread
= SAMPLE_THREAD
;
11400 printf_filtered (_("Remote threadset test\n"));
11401 set_general_thread (sample_thread
);
11406 threadalive_test (const char *cmd
, int tty
)
11408 int sample_thread
= SAMPLE_THREAD
;
11409 int pid
= inferior_ptid
.pid ();
11410 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11412 if (remote_thread_alive (ptid
))
11413 printf_filtered ("PASS: Thread alive test\n");
11415 printf_filtered ("FAIL: Thread alive test\n");
11418 void output_threadid (char *title
, threadref
*ref
);
11421 output_threadid (char *title
, threadref
*ref
)
11425 pack_threadid (&hexid
[0], ref
); /* Convert thread id into hex. */
11427 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11431 threadlist_test_cmd (const char *cmd
, int tty
)
11434 threadref nextthread
;
11435 int done
, result_count
;
11436 threadref threadlist
[3];
11438 printf_filtered ("Remote Threadlist test\n");
11439 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11440 &result_count
, &threadlist
[0]))
11441 printf_filtered ("FAIL: threadlist test\n");
11444 threadref
*scan
= threadlist
;
11445 threadref
*limit
= scan
+ result_count
;
11447 while (scan
< limit
)
11448 output_threadid (" thread ", scan
++);
11453 display_thread_info (struct gdb_ext_thread_info
*info
)
11455 output_threadid ("Threadid: ", &info
->threadid
);
11456 printf_filtered ("Name: %s\n ", info
->shortname
);
11457 printf_filtered ("State: %s\n", info
->display
);
11458 printf_filtered ("other: %s\n\n", info
->more_display
);
11462 get_and_display_threadinfo (threadref
*ref
)
11466 struct gdb_ext_thread_info threadinfo
;
11468 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11469 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11470 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11471 display_thread_info (&threadinfo
);
11476 threadinfo_test_cmd (const char *cmd
, int tty
)
11478 int athread
= SAMPLE_THREAD
;
11482 int_to_threadref (&thread
, athread
);
11483 printf_filtered ("Remote Threadinfo test\n");
11484 if (!get_and_display_threadinfo (&thread
))
11485 printf_filtered ("FAIL cannot get thread info\n");
11489 thread_display_step (threadref
*ref
, void *context
)
11491 /* output_threadid(" threadstep ",ref); *//* simple test */
11492 return get_and_display_threadinfo (ref
);
11496 threadlist_update_test_cmd (const char *cmd
, int tty
)
11498 printf_filtered ("Remote Threadlist update test\n");
11499 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11503 init_remote_threadtests (void)
11505 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11506 _("Fetch and print the remote list of "
11507 "thread identifiers, one pkt only."));
11508 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11509 _("Fetch and display info about one thread."));
11510 add_com ("tset", class_obscure
, threadset_test_cmd
,
11511 _("Test setting to a different thread."));
11512 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11513 _("Iterate through updating all remote thread info."));
11514 add_com ("talive", class_obscure
, threadalive_test
,
11515 _("Remote thread alive test."));
11520 /* Convert a thread ID to a string. */
11523 remote_target::pid_to_str (ptid_t ptid
)
11525 struct remote_state
*rs
= get_remote_state ();
11527 if (ptid
== null_ptid
)
11528 return normal_pid_to_str (ptid
);
11529 else if (ptid
.is_pid ())
11531 /* Printing an inferior target id. */
11533 /* When multi-process extensions are off, there's no way in the
11534 remote protocol to know the remote process id, if there's any
11535 at all. There's one exception --- when we're connected with
11536 target extended-remote, and we manually attached to a process
11537 with "attach PID". We don't record anywhere a flag that
11538 allows us to distinguish that case from the case of
11539 connecting with extended-remote and the stub already being
11540 attached to a process, and reporting yes to qAttached, hence
11541 no smart special casing here. */
11542 if (!remote_multi_process_p (rs
))
11543 return "Remote target";
11545 return normal_pid_to_str (ptid
);
11549 if (magic_null_ptid
== ptid
)
11550 return "Thread <main>";
11551 else if (remote_multi_process_p (rs
))
11552 if (ptid
.lwp () == 0)
11553 return normal_pid_to_str (ptid
);
11555 return string_printf ("Thread %d.%ld",
11556 ptid
.pid (), ptid
.lwp ());
11558 return string_printf ("Thread %ld", ptid
.lwp ());
11562 /* Get the address of the thread local variable in OBJFILE which is
11563 stored at OFFSET within the thread local storage for thread PTID. */
11566 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11569 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11571 struct remote_state
*rs
= get_remote_state ();
11572 char *p
= rs
->buf
.data ();
11573 char *endp
= p
+ get_remote_packet_size ();
11574 enum packet_result result
;
11576 strcpy (p
, "qGetTLSAddr:");
11578 p
= write_ptid (p
, endp
, ptid
);
11580 p
+= hexnumstr (p
, offset
);
11582 p
+= hexnumstr (p
, lm
);
11586 getpkt (&rs
->buf
, 0);
11587 result
= packet_ok (rs
->buf
,
11588 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11589 if (result
== PACKET_OK
)
11593 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11596 else if (result
== PACKET_UNKNOWN
)
11597 throw_error (TLS_GENERIC_ERROR
,
11598 _("Remote target doesn't support qGetTLSAddr packet"));
11600 throw_error (TLS_GENERIC_ERROR
,
11601 _("Remote target failed to process qGetTLSAddr request"));
11604 throw_error (TLS_GENERIC_ERROR
,
11605 _("TLS not supported or disabled on this target"));
11610 /* Provide thread local base, i.e. Thread Information Block address.
11611 Returns 1 if ptid is found and thread_local_base is non zero. */
11614 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11616 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11618 struct remote_state
*rs
= get_remote_state ();
11619 char *p
= rs
->buf
.data ();
11620 char *endp
= p
+ get_remote_packet_size ();
11621 enum packet_result result
;
11623 strcpy (p
, "qGetTIBAddr:");
11625 p
= write_ptid (p
, endp
, ptid
);
11629 getpkt (&rs
->buf
, 0);
11630 result
= packet_ok (rs
->buf
,
11631 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11632 if (result
== PACKET_OK
)
11635 unpack_varlen_hex (rs
->buf
.data (), &val
);
11637 *addr
= (CORE_ADDR
) val
;
11640 else if (result
== PACKET_UNKNOWN
)
11641 error (_("Remote target doesn't support qGetTIBAddr packet"));
11643 error (_("Remote target failed to process qGetTIBAddr request"));
11646 error (_("qGetTIBAddr not supported or disabled on this target"));
11651 /* Support for inferring a target description based on the current
11652 architecture and the size of a 'g' packet. While the 'g' packet
11653 can have any size (since optional registers can be left off the
11654 end), some sizes are easily recognizable given knowledge of the
11655 approximate architecture. */
11657 struct remote_g_packet_guess
11659 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11666 const struct target_desc
*tdesc
;
11669 struct remote_g_packet_data
: public allocate_on_obstack
11671 std::vector
<remote_g_packet_guess
> guesses
;
11674 static struct gdbarch_data
*remote_g_packet_data_handle
;
11677 remote_g_packet_data_init (struct obstack
*obstack
)
11679 return new (obstack
) remote_g_packet_data
;
11683 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11684 const struct target_desc
*tdesc
)
11686 struct remote_g_packet_data
*data
11687 = ((struct remote_g_packet_data
*)
11688 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11690 gdb_assert (tdesc
!= NULL
);
11692 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11693 if (guess
.bytes
== bytes
)
11694 internal_error (__FILE__
, __LINE__
,
11695 _("Duplicate g packet description added for size %d"),
11698 data
->guesses
.emplace_back (bytes
, tdesc
);
11701 /* Return true if remote_read_description would do anything on this target
11702 and architecture, false otherwise. */
11705 remote_read_description_p (struct target_ops
*target
)
11707 struct remote_g_packet_data
*data
11708 = ((struct remote_g_packet_data
*)
11709 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11711 return !data
->guesses
.empty ();
11714 const struct target_desc
*
11715 remote_target::read_description ()
11717 struct remote_g_packet_data
*data
11718 = ((struct remote_g_packet_data
*)
11719 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11721 /* Do not try this during initial connection, when we do not know
11722 whether there is a running but stopped thread. */
11723 if (!target_has_execution
|| inferior_ptid
== null_ptid
)
11724 return beneath ()->read_description ();
11726 if (!data
->guesses
.empty ())
11728 int bytes
= send_g_packet ();
11730 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11731 if (guess
.bytes
== bytes
)
11732 return guess
.tdesc
;
11734 /* We discard the g packet. A minor optimization would be to
11735 hold on to it, and fill the register cache once we have selected
11736 an architecture, but it's too tricky to do safely. */
11739 return beneath ()->read_description ();
11742 /* Remote file transfer support. This is host-initiated I/O, not
11743 target-initiated; for target-initiated, see remote-fileio.c. */
11745 /* If *LEFT is at least the length of STRING, copy STRING to
11746 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11747 decrease *LEFT. Otherwise raise an error. */
11750 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11752 int len
= strlen (string
);
11755 error (_("Packet too long for target."));
11757 memcpy (*buffer
, string
, len
);
11761 /* NUL-terminate the buffer as a convenience, if there is
11767 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11768 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11769 decrease *LEFT. Otherwise raise an error. */
11772 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11775 if (2 * len
> *left
)
11776 error (_("Packet too long for target."));
11778 bin2hex (bytes
, *buffer
, len
);
11779 *buffer
+= 2 * len
;
11782 /* NUL-terminate the buffer as a convenience, if there is
11788 /* If *LEFT is large enough, convert VALUE to hex and add it to
11789 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11790 decrease *LEFT. Otherwise raise an error. */
11793 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11795 int len
= hexnumlen (value
);
11798 error (_("Packet too long for target."));
11800 hexnumstr (*buffer
, value
);
11804 /* NUL-terminate the buffer as a convenience, if there is
11810 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11811 value, *REMOTE_ERRNO to the remote error number or zero if none
11812 was included, and *ATTACHMENT to point to the start of the annex
11813 if any. The length of the packet isn't needed here; there may
11814 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11816 Return 0 if the packet could be parsed, -1 if it could not. If
11817 -1 is returned, the other variables may not be initialized. */
11820 remote_hostio_parse_result (char *buffer
, int *retcode
,
11821 int *remote_errno
, char **attachment
)
11826 *attachment
= NULL
;
11828 if (buffer
[0] != 'F')
11832 *retcode
= strtol (&buffer
[1], &p
, 16);
11833 if (errno
!= 0 || p
== &buffer
[1])
11836 /* Check for ",errno". */
11840 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11841 if (errno
!= 0 || p
+ 1 == p2
)
11846 /* Check for ";attachment". If there is no attachment, the
11847 packet should end here. */
11850 *attachment
= p
+ 1;
11853 else if (*p
== '\0')
11859 /* Send a prepared I/O packet to the target and read its response.
11860 The prepared packet is in the global RS->BUF before this function
11861 is called, and the answer is there when we return.
11863 COMMAND_BYTES is the length of the request to send, which may include
11864 binary data. WHICH_PACKET is the packet configuration to check
11865 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11866 is set to the error number and -1 is returned. Otherwise the value
11867 returned by the function is returned.
11869 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11870 attachment is expected; an error will be reported if there's a
11871 mismatch. If one is found, *ATTACHMENT will be set to point into
11872 the packet buffer and *ATTACHMENT_LEN will be set to the
11873 attachment's length. */
11876 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
11877 int *remote_errno
, char **attachment
,
11878 int *attachment_len
)
11880 struct remote_state
*rs
= get_remote_state ();
11881 int ret
, bytes_read
;
11882 char *attachment_tmp
;
11884 if (packet_support (which_packet
) == PACKET_DISABLE
)
11886 *remote_errno
= FILEIO_ENOSYS
;
11890 putpkt_binary (rs
->buf
.data (), command_bytes
);
11891 bytes_read
= getpkt_sane (&rs
->buf
, 0);
11893 /* If it timed out, something is wrong. Don't try to parse the
11895 if (bytes_read
< 0)
11897 *remote_errno
= FILEIO_EINVAL
;
11901 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11904 *remote_errno
= FILEIO_EINVAL
;
11906 case PACKET_UNKNOWN
:
11907 *remote_errno
= FILEIO_ENOSYS
;
11913 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
11916 *remote_errno
= FILEIO_EINVAL
;
11920 /* Make sure we saw an attachment if and only if we expected one. */
11921 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11922 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11924 *remote_errno
= FILEIO_EINVAL
;
11928 /* If an attachment was found, it must point into the packet buffer;
11929 work out how many bytes there were. */
11930 if (attachment_tmp
!= NULL
)
11932 *attachment
= attachment_tmp
;
11933 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
11939 /* See declaration.h. */
11942 readahead_cache::invalidate ()
11947 /* See declaration.h. */
11950 readahead_cache::invalidate_fd (int fd
)
11952 if (this->fd
== fd
)
11956 /* Set the filesystem remote_hostio functions that take FILENAME
11957 arguments will use. Return 0 on success, or -1 if an error
11958 occurs (and set *REMOTE_ERRNO). */
11961 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
11964 struct remote_state
*rs
= get_remote_state ();
11965 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11966 char *p
= rs
->buf
.data ();
11967 int left
= get_remote_packet_size () - 1;
11971 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11974 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11977 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11979 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11980 remote_buffer_add_string (&p
, &left
, arg
);
11982 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
11983 remote_errno
, NULL
, NULL
);
11985 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11989 rs
->fs_pid
= required_pid
;
11994 /* Implementation of to_fileio_open. */
11997 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
11998 int flags
, int mode
, int warn_if_slow
,
12001 struct remote_state
*rs
= get_remote_state ();
12002 char *p
= rs
->buf
.data ();
12003 int left
= get_remote_packet_size () - 1;
12007 static int warning_issued
= 0;
12009 printf_unfiltered (_("Reading %s from remote target...\n"),
12012 if (!warning_issued
)
12014 warning (_("File transfers from remote targets can be slow."
12015 " Use \"set sysroot\" to access files locally"
12017 warning_issued
= 1;
12021 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12024 remote_buffer_add_string (&p
, &left
, "vFile:open:");
12026 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12027 strlen (filename
));
12028 remote_buffer_add_string (&p
, &left
, ",");
12030 remote_buffer_add_int (&p
, &left
, flags
);
12031 remote_buffer_add_string (&p
, &left
, ",");
12033 remote_buffer_add_int (&p
, &left
, mode
);
12035 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
12036 remote_errno
, NULL
, NULL
);
12040 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
12041 int flags
, int mode
, int warn_if_slow
,
12044 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
12048 /* Implementation of to_fileio_pwrite. */
12051 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12052 ULONGEST offset
, int *remote_errno
)
12054 struct remote_state
*rs
= get_remote_state ();
12055 char *p
= rs
->buf
.data ();
12056 int left
= get_remote_packet_size ();
12059 rs
->readahead_cache
.invalidate_fd (fd
);
12061 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
12063 remote_buffer_add_int (&p
, &left
, fd
);
12064 remote_buffer_add_string (&p
, &left
, ",");
12066 remote_buffer_add_int (&p
, &left
, offset
);
12067 remote_buffer_add_string (&p
, &left
, ",");
12069 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
12070 (get_remote_packet_size ()
12071 - (p
- rs
->buf
.data ())));
12073 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
12074 remote_errno
, NULL
, NULL
);
12078 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12079 ULONGEST offset
, int *remote_errno
)
12081 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12084 /* Helper for the implementation of to_fileio_pread. Read the file
12085 from the remote side with vFile:pread. */
12088 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12089 ULONGEST offset
, int *remote_errno
)
12091 struct remote_state
*rs
= get_remote_state ();
12092 char *p
= rs
->buf
.data ();
12094 int left
= get_remote_packet_size ();
12095 int ret
, attachment_len
;
12098 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12100 remote_buffer_add_int (&p
, &left
, fd
);
12101 remote_buffer_add_string (&p
, &left
, ",");
12103 remote_buffer_add_int (&p
, &left
, len
);
12104 remote_buffer_add_string (&p
, &left
, ",");
12106 remote_buffer_add_int (&p
, &left
, offset
);
12108 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
12109 remote_errno
, &attachment
,
12115 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12117 if (read_len
!= ret
)
12118 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12123 /* See declaration.h. */
12126 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12130 && this->offset
<= offset
12131 && offset
< this->offset
+ this->bufsize
)
12133 ULONGEST max
= this->offset
+ this->bufsize
;
12135 if (offset
+ len
> max
)
12136 len
= max
- offset
;
12138 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12145 /* Implementation of to_fileio_pread. */
12148 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12149 ULONGEST offset
, int *remote_errno
)
12152 struct remote_state
*rs
= get_remote_state ();
12153 readahead_cache
*cache
= &rs
->readahead_cache
;
12155 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12158 cache
->hit_count
++;
12161 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
12162 pulongest (cache
->hit_count
));
12166 cache
->miss_count
++;
12168 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
12169 pulongest (cache
->miss_count
));
12172 cache
->offset
= offset
;
12173 cache
->bufsize
= get_remote_packet_size ();
12174 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12176 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12177 cache
->offset
, remote_errno
);
12180 cache
->invalidate_fd (fd
);
12184 cache
->bufsize
= ret
;
12185 return cache
->pread (fd
, read_buf
, len
, offset
);
12189 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12190 ULONGEST offset
, int *remote_errno
)
12192 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12195 /* Implementation of to_fileio_close. */
12198 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12200 struct remote_state
*rs
= get_remote_state ();
12201 char *p
= rs
->buf
.data ();
12202 int left
= get_remote_packet_size () - 1;
12204 rs
->readahead_cache
.invalidate_fd (fd
);
12206 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12208 remote_buffer_add_int (&p
, &left
, fd
);
12210 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12211 remote_errno
, NULL
, NULL
);
12215 remote_target::fileio_close (int fd
, int *remote_errno
)
12217 return remote_hostio_close (fd
, remote_errno
);
12220 /* Implementation of to_fileio_unlink. */
12223 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12226 struct remote_state
*rs
= get_remote_state ();
12227 char *p
= rs
->buf
.data ();
12228 int left
= get_remote_packet_size () - 1;
12230 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12233 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12235 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12236 strlen (filename
));
12238 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12239 remote_errno
, NULL
, NULL
);
12243 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12246 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12249 /* Implementation of to_fileio_readlink. */
12251 gdb::optional
<std::string
>
12252 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12255 struct remote_state
*rs
= get_remote_state ();
12256 char *p
= rs
->buf
.data ();
12258 int left
= get_remote_packet_size ();
12259 int len
, attachment_len
;
12262 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12265 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12267 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12268 strlen (filename
));
12270 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12271 remote_errno
, &attachment
,
12277 std::string
ret (len
, '\0');
12279 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12280 (gdb_byte
*) &ret
[0], len
);
12281 if (read_len
!= len
)
12282 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12287 /* Implementation of to_fileio_fstat. */
12290 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12292 struct remote_state
*rs
= get_remote_state ();
12293 char *p
= rs
->buf
.data ();
12294 int left
= get_remote_packet_size ();
12295 int attachment_len
, ret
;
12297 struct fio_stat fst
;
12300 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12302 remote_buffer_add_int (&p
, &left
, fd
);
12304 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12305 remote_errno
, &attachment
,
12309 if (*remote_errno
!= FILEIO_ENOSYS
)
12312 /* Strictly we should return -1, ENOSYS here, but when
12313 "set sysroot remote:" was implemented in August 2008
12314 BFD's need for a stat function was sidestepped with
12315 this hack. This was not remedied until March 2015
12316 so we retain the previous behavior to avoid breaking
12319 Note that the memset is a March 2015 addition; older
12320 GDBs set st_size *and nothing else* so the structure
12321 would have garbage in all other fields. This might
12322 break something but retaining the previous behavior
12323 here would be just too wrong. */
12325 memset (st
, 0, sizeof (struct stat
));
12326 st
->st_size
= INT_MAX
;
12330 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12331 (gdb_byte
*) &fst
, sizeof (fst
));
12333 if (read_len
!= ret
)
12334 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12336 if (read_len
!= sizeof (fst
))
12337 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12338 read_len
, (int) sizeof (fst
));
12340 remote_fileio_to_host_stat (&fst
, st
);
12345 /* Implementation of to_filesystem_is_local. */
12348 remote_target::filesystem_is_local ()
12350 /* Valgrind GDB presents itself as a remote target but works
12351 on the local filesystem: it does not implement remote get
12352 and users are not expected to set a sysroot. To handle
12353 this case we treat the remote filesystem as local if the
12354 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12355 does not support vFile:open. */
12356 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12358 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12360 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12362 int fd
, remote_errno
;
12364 /* Try opening a file to probe support. The supplied
12365 filename is irrelevant, we only care about whether
12366 the stub recognizes the packet or not. */
12367 fd
= remote_hostio_open (NULL
, "just probing",
12368 FILEIO_O_RDONLY
, 0700, 0,
12372 remote_hostio_close (fd
, &remote_errno
);
12374 ps
= packet_support (PACKET_vFile_open
);
12377 if (ps
== PACKET_DISABLE
)
12379 static int warning_issued
= 0;
12381 if (!warning_issued
)
12383 warning (_("remote target does not support file"
12384 " transfer, attempting to access files"
12385 " from local filesystem."));
12386 warning_issued
= 1;
12397 remote_fileio_errno_to_host (int errnum
)
12403 case FILEIO_ENOENT
:
12411 case FILEIO_EACCES
:
12413 case FILEIO_EFAULT
:
12417 case FILEIO_EEXIST
:
12419 case FILEIO_ENODEV
:
12421 case FILEIO_ENOTDIR
:
12423 case FILEIO_EISDIR
:
12425 case FILEIO_EINVAL
:
12427 case FILEIO_ENFILE
:
12429 case FILEIO_EMFILE
:
12433 case FILEIO_ENOSPC
:
12435 case FILEIO_ESPIPE
:
12439 case FILEIO_ENOSYS
:
12441 case FILEIO_ENAMETOOLONG
:
12442 return ENAMETOOLONG
;
12448 remote_hostio_error (int errnum
)
12450 int host_error
= remote_fileio_errno_to_host (errnum
);
12452 if (host_error
== -1)
12453 error (_("Unknown remote I/O error %d"), errnum
);
12455 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12458 /* A RAII wrapper around a remote file descriptor. */
12460 class scoped_remote_fd
12463 scoped_remote_fd (remote_target
*remote
, int fd
)
12464 : m_remote (remote
), m_fd (fd
)
12468 ~scoped_remote_fd ()
12475 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12479 /* Swallow exception before it escapes the dtor. If
12480 something goes wrong, likely the connection is gone,
12481 and there's nothing else that can be done. */
12486 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12488 /* Release ownership of the file descriptor, and return it. */
12489 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12496 /* Return the owned file descriptor. */
12497 int get () const noexcept
12503 /* The remote target. */
12504 remote_target
*m_remote
;
12506 /* The owned remote I/O file descriptor. */
12511 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12513 remote_target
*remote
= get_current_remote_target ();
12515 if (remote
== nullptr)
12516 error (_("command can only be used with remote target"));
12518 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12522 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12525 int retcode
, remote_errno
, bytes
, io_size
;
12526 int bytes_in_buffer
;
12530 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12532 perror_with_name (local_file
);
12534 scoped_remote_fd fd
12535 (this, remote_hostio_open (NULL
,
12536 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12538 0700, 0, &remote_errno
));
12539 if (fd
.get () == -1)
12540 remote_hostio_error (remote_errno
);
12542 /* Send up to this many bytes at once. They won't all fit in the
12543 remote packet limit, so we'll transfer slightly fewer. */
12544 io_size
= get_remote_packet_size ();
12545 gdb::byte_vector
buffer (io_size
);
12547 bytes_in_buffer
= 0;
12550 while (bytes_in_buffer
|| !saw_eof
)
12554 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12555 io_size
- bytes_in_buffer
,
12559 if (ferror (file
.get ()))
12560 error (_("Error reading %s."), local_file
);
12563 /* EOF. Unless there is something still in the
12564 buffer from the last iteration, we are done. */
12566 if (bytes_in_buffer
== 0)
12574 bytes
+= bytes_in_buffer
;
12575 bytes_in_buffer
= 0;
12577 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12578 offset
, &remote_errno
);
12581 remote_hostio_error (remote_errno
);
12582 else if (retcode
== 0)
12583 error (_("Remote write of %d bytes returned 0!"), bytes
);
12584 else if (retcode
< bytes
)
12586 /* Short write. Save the rest of the read data for the next
12588 bytes_in_buffer
= bytes
- retcode
;
12589 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12595 if (remote_hostio_close (fd
.release (), &remote_errno
))
12596 remote_hostio_error (remote_errno
);
12599 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12603 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12605 remote_target
*remote
= get_current_remote_target ();
12607 if (remote
== nullptr)
12608 error (_("command can only be used with remote target"));
12610 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12614 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12617 int remote_errno
, bytes
, io_size
;
12620 scoped_remote_fd fd
12621 (this, remote_hostio_open (NULL
,
12622 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12624 if (fd
.get () == -1)
12625 remote_hostio_error (remote_errno
);
12627 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12629 perror_with_name (local_file
);
12631 /* Send up to this many bytes at once. They won't all fit in the
12632 remote packet limit, so we'll transfer slightly fewer. */
12633 io_size
= get_remote_packet_size ();
12634 gdb::byte_vector
buffer (io_size
);
12639 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12642 /* Success, but no bytes, means end-of-file. */
12645 remote_hostio_error (remote_errno
);
12649 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12651 perror_with_name (local_file
);
12654 if (remote_hostio_close (fd
.release (), &remote_errno
))
12655 remote_hostio_error (remote_errno
);
12658 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12662 remote_file_delete (const char *remote_file
, int from_tty
)
12664 remote_target
*remote
= get_current_remote_target ();
12666 if (remote
== nullptr)
12667 error (_("command can only be used with remote target"));
12669 remote
->remote_file_delete (remote_file
, from_tty
);
12673 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12675 int retcode
, remote_errno
;
12677 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12679 remote_hostio_error (remote_errno
);
12682 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12686 remote_put_command (const char *args
, int from_tty
)
12689 error_no_arg (_("file to put"));
12691 gdb_argv
argv (args
);
12692 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12693 error (_("Invalid parameters to remote put"));
12695 remote_file_put (argv
[0], argv
[1], from_tty
);
12699 remote_get_command (const char *args
, int from_tty
)
12702 error_no_arg (_("file to get"));
12704 gdb_argv
argv (args
);
12705 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12706 error (_("Invalid parameters to remote get"));
12708 remote_file_get (argv
[0], argv
[1], from_tty
);
12712 remote_delete_command (const char *args
, int from_tty
)
12715 error_no_arg (_("file to delete"));
12717 gdb_argv
argv (args
);
12718 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12719 error (_("Invalid parameters to remote delete"));
12721 remote_file_delete (argv
[0], from_tty
);
12725 remote_target::can_execute_reverse ()
12727 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12728 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12735 remote_target::supports_non_stop ()
12741 remote_target::supports_disable_randomization ()
12743 /* Only supported in extended mode. */
12748 remote_target::supports_multi_process ()
12750 struct remote_state
*rs
= get_remote_state ();
12752 return remote_multi_process_p (rs
);
12756 remote_supports_cond_tracepoints ()
12758 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12762 remote_target::supports_evaluation_of_breakpoint_conditions ()
12764 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12768 remote_supports_fast_tracepoints ()
12770 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12774 remote_supports_static_tracepoints ()
12776 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12780 remote_supports_install_in_trace ()
12782 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12786 remote_target::supports_enable_disable_tracepoint ()
12788 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12793 remote_target::supports_string_tracing ()
12795 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12799 remote_target::can_run_breakpoint_commands ()
12801 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12805 remote_target::trace_init ()
12807 struct remote_state
*rs
= get_remote_state ();
12810 remote_get_noisy_reply ();
12811 if (strcmp (rs
->buf
.data (), "OK") != 0)
12812 error (_("Target does not support this command."));
12815 /* Recursive routine to walk through command list including loops, and
12816 download packets for each command. */
12819 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
12820 struct command_line
*cmds
)
12822 struct remote_state
*rs
= get_remote_state ();
12823 struct command_line
*cmd
;
12825 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12827 QUIT
; /* Allow user to bail out with ^C. */
12828 strcpy (rs
->buf
.data (), "QTDPsrc:");
12829 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12830 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12831 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12833 remote_get_noisy_reply ();
12834 if (strcmp (rs
->buf
.data (), "OK"))
12835 warning (_("Target does not support source download."));
12837 if (cmd
->control_type
== while_control
12838 || cmd
->control_type
== while_stepping_control
)
12840 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
12842 QUIT
; /* Allow user to bail out with ^C. */
12843 strcpy (rs
->buf
.data (), "QTDPsrc:");
12844 encode_source_string (num
, addr
, "cmd", "end",
12845 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12846 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12848 remote_get_noisy_reply ();
12849 if (strcmp (rs
->buf
.data (), "OK"))
12850 warning (_("Target does not support source download."));
12856 remote_target::download_tracepoint (struct bp_location
*loc
)
12860 std::vector
<std::string
> tdp_actions
;
12861 std::vector
<std::string
> stepping_actions
;
12863 struct breakpoint
*b
= loc
->owner
;
12864 struct tracepoint
*t
= (struct tracepoint
*) b
;
12865 struct remote_state
*rs
= get_remote_state ();
12867 const char *err_msg
= _("Tracepoint packet too large for target.");
12870 /* We use a buffer other than rs->buf because we'll build strings
12871 across multiple statements, and other statements in between could
12873 gdb::char_vector
buf (get_remote_packet_size ());
12875 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12877 tpaddr
= loc
->address
;
12878 strcpy (addrbuf
, phex (tpaddr
, sizeof (CORE_ADDR
)));
12879 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
12880 b
->number
, addrbuf
, /* address */
12881 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12882 t
->step_count
, t
->pass_count
);
12884 if (ret
< 0 || ret
>= buf
.size ())
12885 error ("%s", err_msg
);
12887 /* Fast tracepoints are mostly handled by the target, but we can
12888 tell the target how big of an instruction block should be moved
12890 if (b
->type
== bp_fast_tracepoint
)
12892 /* Only test for support at download time; we may not know
12893 target capabilities at definition time. */
12894 if (remote_supports_fast_tracepoints ())
12896 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12899 size_left
= buf
.size () - strlen (buf
.data ());
12900 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12902 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12904 if (ret
< 0 || ret
>= size_left
)
12905 error ("%s", err_msg
);
12908 /* If it passed validation at definition but fails now,
12909 something is very wrong. */
12910 internal_error (__FILE__
, __LINE__
,
12911 _("Fast tracepoint not "
12912 "valid during download"));
12915 /* Fast tracepoints are functionally identical to regular
12916 tracepoints, so don't take lack of support as a reason to
12917 give up on the trace run. */
12918 warning (_("Target does not support fast tracepoints, "
12919 "downloading %d as regular tracepoint"), b
->number
);
12921 else if (b
->type
== bp_static_tracepoint
)
12923 /* Only test for support at download time; we may not know
12924 target capabilities at definition time. */
12925 if (remote_supports_static_tracepoints ())
12927 struct static_tracepoint_marker marker
;
12929 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12931 size_left
= buf
.size () - strlen (buf
.data ());
12932 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12935 if (ret
< 0 || ret
>= size_left
)
12936 error ("%s", err_msg
);
12939 error (_("Static tracepoint not valid during download"));
12942 /* Fast tracepoints are functionally identical to regular
12943 tracepoints, so don't take lack of support as a reason
12944 to give up on the trace run. */
12945 error (_("Target does not support static tracepoints"));
12947 /* If the tracepoint has a conditional, make it into an agent
12948 expression and append to the definition. */
12951 /* Only test support at download time, we may not know target
12952 capabilities at definition time. */
12953 if (remote_supports_cond_tracepoints ())
12955 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
12958 size_left
= buf
.size () - strlen (buf
.data ());
12960 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12961 size_left
, ":X%x,", aexpr
->len
);
12963 if (ret
< 0 || ret
>= size_left
)
12964 error ("%s", err_msg
);
12966 size_left
= buf
.size () - strlen (buf
.data ());
12968 /* Two bytes to encode each aexpr byte, plus the terminating
12970 if (aexpr
->len
* 2 + 1 > size_left
)
12971 error ("%s", err_msg
);
12973 pkt
= buf
.data () + strlen (buf
.data ());
12975 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12976 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12980 warning (_("Target does not support conditional tracepoints, "
12981 "ignoring tp %d cond"), b
->number
);
12984 if (b
->commands
|| *default_collect
)
12986 size_left
= buf
.size () - strlen (buf
.data ());
12988 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12991 if (ret
< 0 || ret
>= size_left
)
12992 error ("%s", err_msg
);
12995 putpkt (buf
.data ());
12996 remote_get_noisy_reply ();
12997 if (strcmp (rs
->buf
.data (), "OK"))
12998 error (_("Target does not support tracepoints."));
13000 /* do_single_steps (t); */
13001 for (auto action_it
= tdp_actions
.begin ();
13002 action_it
!= tdp_actions
.end (); action_it
++)
13004 QUIT
; /* Allow user to bail out with ^C. */
13006 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
13007 || !stepping_actions
.empty ());
13009 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
13010 b
->number
, addrbuf
, /* address */
13011 action_it
->c_str (),
13012 has_more
? '-' : 0);
13014 if (ret
< 0 || ret
>= buf
.size ())
13015 error ("%s", err_msg
);
13017 putpkt (buf
.data ());
13018 remote_get_noisy_reply ();
13019 if (strcmp (rs
->buf
.data (), "OK"))
13020 error (_("Error on target while setting tracepoints."));
13023 for (auto action_it
= stepping_actions
.begin ();
13024 action_it
!= stepping_actions
.end (); action_it
++)
13026 QUIT
; /* Allow user to bail out with ^C. */
13028 bool is_first
= action_it
== stepping_actions
.begin ();
13029 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
13031 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
13032 b
->number
, addrbuf
, /* address */
13033 is_first
? "S" : "",
13034 action_it
->c_str (),
13035 has_more
? "-" : "");
13037 if (ret
< 0 || ret
>= buf
.size ())
13038 error ("%s", err_msg
);
13040 putpkt (buf
.data ());
13041 remote_get_noisy_reply ();
13042 if (strcmp (rs
->buf
.data (), "OK"))
13043 error (_("Error on target while setting tracepoints."));
13046 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
13048 if (b
->location
!= NULL
)
13050 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13052 if (ret
< 0 || ret
>= buf
.size ())
13053 error ("%s", err_msg
);
13055 encode_source_string (b
->number
, loc
->address
, "at",
13056 event_location_to_string (b
->location
.get ()),
13057 buf
.data () + strlen (buf
.data ()),
13058 buf
.size () - strlen (buf
.data ()));
13059 putpkt (buf
.data ());
13060 remote_get_noisy_reply ();
13061 if (strcmp (rs
->buf
.data (), "OK"))
13062 warning (_("Target does not support source download."));
13064 if (b
->cond_string
)
13066 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13068 if (ret
< 0 || ret
>= buf
.size ())
13069 error ("%s", err_msg
);
13071 encode_source_string (b
->number
, loc
->address
,
13072 "cond", b
->cond_string
,
13073 buf
.data () + strlen (buf
.data ()),
13074 buf
.size () - strlen (buf
.data ()));
13075 putpkt (buf
.data ());
13076 remote_get_noisy_reply ();
13077 if (strcmp (rs
->buf
.data (), "OK"))
13078 warning (_("Target does not support source download."));
13080 remote_download_command_source (b
->number
, loc
->address
,
13081 breakpoint_commands (b
));
13086 remote_target::can_download_tracepoint ()
13088 struct remote_state
*rs
= get_remote_state ();
13089 struct trace_status
*ts
;
13092 /* Don't try to install tracepoints until we've relocated our
13093 symbols, and fetched and merged the target's tracepoint list with
13095 if (rs
->starting_up
)
13098 ts
= current_trace_status ();
13099 status
= get_trace_status (ts
);
13101 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13104 /* If we are in a tracing experiment, but remote stub doesn't support
13105 installing tracepoint in trace, we have to return. */
13106 if (!remote_supports_install_in_trace ())
13114 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13116 struct remote_state
*rs
= get_remote_state ();
13119 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13120 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13122 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13123 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13124 >= get_remote_packet_size ())
13125 error (_("Trace state variable name too long for tsv definition packet"));
13126 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13129 remote_get_noisy_reply ();
13130 if (rs
->buf
[0] == '\0')
13131 error (_("Target does not support this command."));
13132 if (strcmp (rs
->buf
.data (), "OK") != 0)
13133 error (_("Error on target while downloading trace state variable."));
13137 remote_target::enable_tracepoint (struct bp_location
*location
)
13139 struct remote_state
*rs
= get_remote_state ();
13141 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13142 location
->owner
->number
,
13143 phex (location
->address
, sizeof (CORE_ADDR
)));
13145 remote_get_noisy_reply ();
13146 if (rs
->buf
[0] == '\0')
13147 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13148 if (strcmp (rs
->buf
.data (), "OK") != 0)
13149 error (_("Error on target while enabling tracepoint."));
13153 remote_target::disable_tracepoint (struct bp_location
*location
)
13155 struct remote_state
*rs
= get_remote_state ();
13157 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13158 location
->owner
->number
,
13159 phex (location
->address
, sizeof (CORE_ADDR
)));
13161 remote_get_noisy_reply ();
13162 if (rs
->buf
[0] == '\0')
13163 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13164 if (strcmp (rs
->buf
.data (), "OK") != 0)
13165 error (_("Error on target while disabling tracepoint."));
13169 remote_target::trace_set_readonly_regions ()
13172 bfd_size_type size
;
13178 return; /* No information to give. */
13180 struct remote_state
*rs
= get_remote_state ();
13182 strcpy (rs
->buf
.data (), "QTro");
13183 offset
= strlen (rs
->buf
.data ());
13184 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
13186 char tmp1
[40], tmp2
[40];
13189 if ((s
->flags
& SEC_LOAD
) == 0 ||
13190 /* (s->flags & SEC_CODE) == 0 || */
13191 (s
->flags
& SEC_READONLY
) == 0)
13195 vma
= bfd_section_vma (s
);
13196 size
= bfd_section_size (s
);
13197 sprintf_vma (tmp1
, vma
);
13198 sprintf_vma (tmp2
, vma
+ size
);
13199 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13200 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13202 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13204 Too many sections for read-only sections definition packet."));
13207 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13209 offset
+= sec_length
;
13214 getpkt (&rs
->buf
, 0);
13219 remote_target::trace_start ()
13221 struct remote_state
*rs
= get_remote_state ();
13223 putpkt ("QTStart");
13224 remote_get_noisy_reply ();
13225 if (rs
->buf
[0] == '\0')
13226 error (_("Target does not support this command."));
13227 if (strcmp (rs
->buf
.data (), "OK") != 0)
13228 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13232 remote_target::get_trace_status (struct trace_status
*ts
)
13234 /* Initialize it just to avoid a GCC false warning. */
13236 enum packet_result result
;
13237 struct remote_state
*rs
= get_remote_state ();
13239 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13242 /* FIXME we need to get register block size some other way. */
13243 trace_regblock_size
13244 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13246 putpkt ("qTStatus");
13250 p
= remote_get_noisy_reply ();
13252 catch (const gdb_exception_error
&ex
)
13254 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13256 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13262 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13264 /* If the remote target doesn't do tracing, flag it. */
13265 if (result
== PACKET_UNKNOWN
)
13268 /* We're working with a live target. */
13269 ts
->filename
= NULL
;
13272 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13274 /* Function 'parse_trace_status' sets default value of each field of
13275 'ts' at first, so we don't have to do it here. */
13276 parse_trace_status (p
, ts
);
13278 return ts
->running
;
13282 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13283 struct uploaded_tp
*utp
)
13285 struct remote_state
*rs
= get_remote_state ();
13287 struct bp_location
*loc
;
13288 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13289 size_t size
= get_remote_packet_size ();
13294 tp
->traceframe_usage
= 0;
13295 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
13297 /* If the tracepoint was never downloaded, don't go asking for
13299 if (tp
->number_on_target
== 0)
13301 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13302 phex_nz (loc
->address
, 0));
13304 reply
= remote_get_noisy_reply ();
13305 if (reply
&& *reply
)
13308 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13314 utp
->hit_count
= 0;
13315 utp
->traceframe_usage
= 0;
13316 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13317 phex_nz (utp
->addr
, 0));
13319 reply
= remote_get_noisy_reply ();
13320 if (reply
&& *reply
)
13323 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13329 remote_target::trace_stop ()
13331 struct remote_state
*rs
= get_remote_state ();
13334 remote_get_noisy_reply ();
13335 if (rs
->buf
[0] == '\0')
13336 error (_("Target does not support this command."));
13337 if (strcmp (rs
->buf
.data (), "OK") != 0)
13338 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13342 remote_target::trace_find (enum trace_find_type type
, int num
,
13343 CORE_ADDR addr1
, CORE_ADDR addr2
,
13346 struct remote_state
*rs
= get_remote_state ();
13347 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13349 int target_frameno
= -1, target_tracept
= -1;
13351 /* Lookups other than by absolute frame number depend on the current
13352 trace selected, so make sure it is correct on the remote end
13354 if (type
!= tfind_number
)
13355 set_remote_traceframe ();
13357 p
= rs
->buf
.data ();
13358 strcpy (p
, "QTFrame:");
13359 p
= strchr (p
, '\0');
13363 xsnprintf (p
, endbuf
- p
, "%x", num
);
13366 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13369 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13372 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13373 phex_nz (addr2
, 0));
13375 case tfind_outside
:
13376 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13377 phex_nz (addr2
, 0));
13380 error (_("Unknown trace find type %d"), type
);
13384 reply
= remote_get_noisy_reply ();
13385 if (*reply
== '\0')
13386 error (_("Target does not support this command."));
13388 while (reply
&& *reply
)
13393 target_frameno
= (int) strtol (p
, &reply
, 16);
13395 error (_("Unable to parse trace frame number"));
13396 /* Don't update our remote traceframe number cache on failure
13397 to select a remote traceframe. */
13398 if (target_frameno
== -1)
13403 target_tracept
= (int) strtol (p
, &reply
, 16);
13405 error (_("Unable to parse tracepoint number"));
13407 case 'O': /* "OK"? */
13408 if (reply
[1] == 'K' && reply
[2] == '\0')
13411 error (_("Bogus reply from target: %s"), reply
);
13414 error (_("Bogus reply from target: %s"), reply
);
13417 *tpp
= target_tracept
;
13419 rs
->remote_traceframe_number
= target_frameno
;
13420 return target_frameno
;
13424 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13426 struct remote_state
*rs
= get_remote_state ();
13430 set_remote_traceframe ();
13432 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13434 reply
= remote_get_noisy_reply ();
13435 if (reply
&& *reply
)
13439 unpack_varlen_hex (reply
+ 1, &uval
);
13440 *val
= (LONGEST
) uval
;
13448 remote_target::save_trace_data (const char *filename
)
13450 struct remote_state
*rs
= get_remote_state ();
13453 p
= rs
->buf
.data ();
13454 strcpy (p
, "QTSave:");
13456 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13457 >= get_remote_packet_size ())
13458 error (_("Remote file name too long for trace save packet"));
13459 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13462 reply
= remote_get_noisy_reply ();
13463 if (*reply
== '\0')
13464 error (_("Target does not support this command."));
13465 if (strcmp (reply
, "OK") != 0)
13466 error (_("Bogus reply from target: %s"), reply
);
13470 /* This is basically a memory transfer, but needs to be its own packet
13471 because we don't know how the target actually organizes its trace
13472 memory, plus we want to be able to ask for as much as possible, but
13473 not be unhappy if we don't get as much as we ask for. */
13476 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13478 struct remote_state
*rs
= get_remote_state ();
13483 p
= rs
->buf
.data ();
13484 strcpy (p
, "qTBuffer:");
13486 p
+= hexnumstr (p
, offset
);
13488 p
+= hexnumstr (p
, len
);
13492 reply
= remote_get_noisy_reply ();
13493 if (reply
&& *reply
)
13495 /* 'l' by itself means we're at the end of the buffer and
13496 there is nothing more to get. */
13500 /* Convert the reply into binary. Limit the number of bytes to
13501 convert according to our passed-in buffer size, rather than
13502 what was returned in the packet; if the target is
13503 unexpectedly generous and gives us a bigger reply than we
13504 asked for, we don't want to crash. */
13505 rslt
= hex2bin (reply
, buf
, len
);
13509 /* Something went wrong, flag as an error. */
13514 remote_target::set_disconnected_tracing (int val
)
13516 struct remote_state
*rs
= get_remote_state ();
13518 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13522 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13523 "QTDisconnected:%x", val
);
13525 reply
= remote_get_noisy_reply ();
13526 if (*reply
== '\0')
13527 error (_("Target does not support this command."));
13528 if (strcmp (reply
, "OK") != 0)
13529 error (_("Bogus reply from target: %s"), reply
);
13532 warning (_("Target does not support disconnected tracing."));
13536 remote_target::core_of_thread (ptid_t ptid
)
13538 thread_info
*info
= find_thread_ptid (this, ptid
);
13540 if (info
!= NULL
&& info
->priv
!= NULL
)
13541 return get_remote_thread_info (info
)->core
;
13547 remote_target::set_circular_trace_buffer (int val
)
13549 struct remote_state
*rs
= get_remote_state ();
13552 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13553 "QTBuffer:circular:%x", val
);
13555 reply
= remote_get_noisy_reply ();
13556 if (*reply
== '\0')
13557 error (_("Target does not support this command."));
13558 if (strcmp (reply
, "OK") != 0)
13559 error (_("Bogus reply from target: %s"), reply
);
13563 remote_target::traceframe_info ()
13565 gdb::optional
<gdb::char_vector
> text
13566 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO
,
13569 return parse_traceframe_info (text
->data ());
13574 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13575 instruction on which a fast tracepoint may be placed. Returns -1
13576 if the packet is not supported, and 0 if the minimum instruction
13577 length is unknown. */
13580 remote_target::get_min_fast_tracepoint_insn_len ()
13582 struct remote_state
*rs
= get_remote_state ();
13585 /* If we're not debugging a process yet, the IPA can't be
13587 if (!target_has_execution
)
13590 /* Make sure the remote is pointing at the right process. */
13591 set_general_process ();
13593 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13595 reply
= remote_get_noisy_reply ();
13596 if (*reply
== '\0')
13600 ULONGEST min_insn_len
;
13602 unpack_varlen_hex (reply
, &min_insn_len
);
13604 return (int) min_insn_len
;
13609 remote_target::set_trace_buffer_size (LONGEST val
)
13611 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13613 struct remote_state
*rs
= get_remote_state ();
13614 char *buf
= rs
->buf
.data ();
13615 char *endbuf
= buf
+ get_remote_packet_size ();
13616 enum packet_result result
;
13618 gdb_assert (val
>= 0 || val
== -1);
13619 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13620 /* Send -1 as literal "-1" to avoid host size dependency. */
13624 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13627 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13630 remote_get_noisy_reply ();
13631 result
= packet_ok (rs
->buf
,
13632 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13634 if (result
!= PACKET_OK
)
13635 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13640 remote_target::set_trace_notes (const char *user
, const char *notes
,
13641 const char *stop_notes
)
13643 struct remote_state
*rs
= get_remote_state ();
13645 char *buf
= rs
->buf
.data ();
13646 char *endbuf
= buf
+ get_remote_packet_size ();
13649 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13652 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13653 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13659 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13660 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13666 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13667 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13671 /* Ensure the buffer is terminated. */
13675 reply
= remote_get_noisy_reply ();
13676 if (*reply
== '\0')
13679 if (strcmp (reply
, "OK") != 0)
13680 error (_("Bogus reply from target: %s"), reply
);
13686 remote_target::use_agent (bool use
)
13688 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13690 struct remote_state
*rs
= get_remote_state ();
13692 /* If the stub supports QAgent. */
13693 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13695 getpkt (&rs
->buf
, 0);
13697 if (strcmp (rs
->buf
.data (), "OK") == 0)
13708 remote_target::can_use_agent ()
13710 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13713 struct btrace_target_info
13715 /* The ptid of the traced thread. */
13718 /* The obtained branch trace configuration. */
13719 struct btrace_config conf
;
13722 /* Reset our idea of our target's btrace configuration. */
13725 remote_btrace_reset (remote_state
*rs
)
13727 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13730 /* Synchronize the configuration with the target. */
13733 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13735 struct packet_config
*packet
;
13736 struct remote_state
*rs
;
13737 char *buf
, *pos
, *endbuf
;
13739 rs
= get_remote_state ();
13740 buf
= rs
->buf
.data ();
13741 endbuf
= buf
+ get_remote_packet_size ();
13743 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13744 if (packet_config_support (packet
) == PACKET_ENABLE
13745 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13748 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13752 getpkt (&rs
->buf
, 0);
13754 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13756 if (buf
[0] == 'E' && buf
[1] == '.')
13757 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13759 error (_("Failed to configure the BTS buffer size."));
13762 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13765 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13766 if (packet_config_support (packet
) == PACKET_ENABLE
13767 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13770 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13774 getpkt (&rs
->buf
, 0);
13776 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13778 if (buf
[0] == 'E' && buf
[1] == '.')
13779 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13781 error (_("Failed to configure the trace buffer size."));
13784 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13788 /* Read the current thread's btrace configuration from the target and
13789 store it into CONF. */
13792 btrace_read_config (struct btrace_config
*conf
)
13794 gdb::optional
<gdb::char_vector
> xml
13795 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF
, "");
13797 parse_xml_btrace_conf (conf
, xml
->data ());
13800 /* Maybe reopen target btrace. */
13803 remote_target::remote_btrace_maybe_reopen ()
13805 struct remote_state
*rs
= get_remote_state ();
13806 int btrace_target_pushed
= 0;
13807 #if !defined (HAVE_LIBIPT)
13811 /* Don't bother walking the entirety of the remote thread list when
13812 we know the feature isn't supported by the remote. */
13813 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
13816 scoped_restore_current_thread restore_thread
;
13818 for (thread_info
*tp
: all_non_exited_threads (this))
13820 set_general_thread (tp
->ptid
);
13822 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13823 btrace_read_config (&rs
->btrace_config
);
13825 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13828 #if !defined (HAVE_LIBIPT)
13829 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13834 warning (_("Target is recording using Intel Processor Trace "
13835 "but support was disabled at compile time."));
13840 #endif /* !defined (HAVE_LIBIPT) */
13842 /* Push target, once, but before anything else happens. This way our
13843 changes to the threads will be cleaned up by unpushing the target
13844 in case btrace_read_config () throws. */
13845 if (!btrace_target_pushed
)
13847 btrace_target_pushed
= 1;
13848 record_btrace_push_target ();
13849 printf_filtered (_("Target is recording using %s.\n"),
13850 btrace_format_string (rs
->btrace_config
.format
));
13853 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13854 tp
->btrace
.target
->ptid
= tp
->ptid
;
13855 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13859 /* Enable branch tracing. */
13861 struct btrace_target_info
*
13862 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
13864 struct btrace_target_info
*tinfo
= NULL
;
13865 struct packet_config
*packet
= NULL
;
13866 struct remote_state
*rs
= get_remote_state ();
13867 char *buf
= rs
->buf
.data ();
13868 char *endbuf
= buf
+ get_remote_packet_size ();
13870 switch (conf
->format
)
13872 case BTRACE_FORMAT_BTS
:
13873 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13876 case BTRACE_FORMAT_PT
:
13877 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13881 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13882 error (_("Target does not support branch tracing."));
13884 btrace_sync_conf (conf
);
13886 set_general_thread (ptid
);
13888 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13890 getpkt (&rs
->buf
, 0);
13892 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13894 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13895 error (_("Could not enable branch tracing for %s: %s"),
13896 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
13898 error (_("Could not enable branch tracing for %s."),
13899 target_pid_to_str (ptid
).c_str ());
13902 tinfo
= XCNEW (struct btrace_target_info
);
13903 tinfo
->ptid
= ptid
;
13905 /* If we fail to read the configuration, we lose some information, but the
13906 tracing itself is not impacted. */
13909 btrace_read_config (&tinfo
->conf
);
13911 catch (const gdb_exception_error
&err
)
13913 if (err
.message
!= NULL
)
13914 warning ("%s", err
.what ());
13920 /* Disable branch tracing. */
13923 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
13925 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13926 struct remote_state
*rs
= get_remote_state ();
13927 char *buf
= rs
->buf
.data ();
13928 char *endbuf
= buf
+ get_remote_packet_size ();
13930 if (packet_config_support (packet
) != PACKET_ENABLE
)
13931 error (_("Target does not support branch tracing."));
13933 set_general_thread (tinfo
->ptid
);
13935 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13937 getpkt (&rs
->buf
, 0);
13939 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13941 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13942 error (_("Could not disable branch tracing for %s: %s"),
13943 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
13945 error (_("Could not disable branch tracing for %s."),
13946 target_pid_to_str (tinfo
->ptid
).c_str ());
13952 /* Teardown branch tracing. */
13955 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
13957 /* We must not talk to the target during teardown. */
13961 /* Read the branch trace. */
13964 remote_target::read_btrace (struct btrace_data
*btrace
,
13965 struct btrace_target_info
*tinfo
,
13966 enum btrace_read_type type
)
13968 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13971 if (packet_config_support (packet
) != PACKET_ENABLE
)
13972 error (_("Target does not support branch tracing."));
13974 #if !defined(HAVE_LIBEXPAT)
13975 error (_("Cannot process branch tracing result. XML parsing not supported."));
13980 case BTRACE_READ_ALL
:
13983 case BTRACE_READ_NEW
:
13986 case BTRACE_READ_DELTA
:
13990 internal_error (__FILE__
, __LINE__
,
13991 _("Bad branch tracing read type: %u."),
13992 (unsigned int) type
);
13995 gdb::optional
<gdb::char_vector
> xml
13996 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE
, annex
);
13998 return BTRACE_ERR_UNKNOWN
;
14000 parse_xml_btrace (btrace
, xml
->data ());
14002 return BTRACE_ERR_NONE
;
14005 const struct btrace_config
*
14006 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
14008 return &tinfo
->conf
;
14012 remote_target::augmented_libraries_svr4_read ()
14014 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
14018 /* Implementation of to_load. */
14021 remote_target::load (const char *name
, int from_tty
)
14023 generic_load (name
, from_tty
);
14026 /* Accepts an integer PID; returns a string representing a file that
14027 can be opened on the remote side to get the symbols for the child
14028 process. Returns NULL if the operation is not supported. */
14031 remote_target::pid_to_exec_file (int pid
)
14033 static gdb::optional
<gdb::char_vector
> filename
;
14034 char *annex
= NULL
;
14036 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
14039 inferior
*inf
= find_inferior_pid (this, pid
);
14041 internal_error (__FILE__
, __LINE__
,
14042 _("not currently attached to process %d"), pid
);
14044 if (!inf
->fake_pid_p
)
14046 const int annex_size
= 9;
14048 annex
= (char *) alloca (annex_size
);
14049 xsnprintf (annex
, annex_size
, "%x", pid
);
14052 filename
= target_read_stralloc (current_top_target (),
14053 TARGET_OBJECT_EXEC_FILE
, annex
);
14055 return filename
? filename
->data () : nullptr;
14058 /* Implement the to_can_do_single_step target_ops method. */
14061 remote_target::can_do_single_step ()
14063 /* We can only tell whether target supports single step or not by
14064 supported s and S vCont actions if the stub supports vContSupported
14065 feature. If the stub doesn't support vContSupported feature,
14066 we have conservatively to think target doesn't supports single
14068 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
14070 struct remote_state
*rs
= get_remote_state ();
14072 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14073 remote_vcont_probe ();
14075 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14081 /* Implementation of the to_execution_direction method for the remote
14084 enum exec_direction_kind
14085 remote_target::execution_direction ()
14087 struct remote_state
*rs
= get_remote_state ();
14089 return rs
->last_resume_exec_dir
;
14092 /* Return pointer to the thread_info struct which corresponds to
14093 THREAD_HANDLE (having length HANDLE_LEN). */
14096 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14100 for (thread_info
*tp
: all_non_exited_threads (this))
14102 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14104 if (tp
->inf
== inf
&& priv
!= NULL
)
14106 if (handle_len
!= priv
->thread_handle
.size ())
14107 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14108 handle_len
, priv
->thread_handle
.size ());
14109 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14119 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14121 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14122 return priv
->thread_handle
;
14126 remote_target::can_async_p ()
14128 struct remote_state
*rs
= get_remote_state ();
14130 /* We don't go async if the user has explicitly prevented it with the
14131 "maint set target-async" command. */
14132 if (!target_async_permitted
)
14135 /* We're async whenever the serial device is. */
14136 return serial_can_async_p (rs
->remote_desc
);
14140 remote_target::is_async_p ()
14142 struct remote_state
*rs
= get_remote_state ();
14144 if (!target_async_permitted
)
14145 /* We only enable async when the user specifically asks for it. */
14148 /* We're async whenever the serial device is. */
14149 return serial_is_async_p (rs
->remote_desc
);
14152 /* Pass the SERIAL event on and up to the client. One day this code
14153 will be able to delay notifying the client of an event until the
14154 point where an entire packet has been received. */
14156 static serial_event_ftype remote_async_serial_handler
;
14159 remote_async_serial_handler (struct serial
*scb
, void *context
)
14161 /* Don't propogate error information up to the client. Instead let
14162 the client find out about the error by querying the target. */
14163 inferior_event_handler (INF_REG_EVENT
);
14167 remote_async_inferior_event_handler (gdb_client_data data
)
14169 inferior_event_handler (INF_REG_EVENT
);
14171 remote_target
*remote
= (remote_target
*) data
;
14172 remote_state
*rs
= remote
->get_remote_state ();
14174 /* inferior_event_handler may have consumed an event pending on the
14175 infrun side without calling target_wait on the REMOTE target, or
14176 may have pulled an event out of a different target. Keep trying
14177 for this remote target as long it still has either pending events
14178 or unacknowledged notifications. */
14180 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
14181 || !rs
->stop_reply_queue
.empty ())
14182 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14186 remote_target::async_wait_fd ()
14188 struct remote_state
*rs
= get_remote_state ();
14189 return rs
->remote_desc
->fd
;
14193 remote_target::async (int enable
)
14195 struct remote_state
*rs
= get_remote_state ();
14199 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14201 /* If there are pending events in the stop reply queue tell the
14202 event loop to process them. */
14203 if (!rs
->stop_reply_queue
.empty ())
14204 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14205 /* For simplicity, below we clear the pending events token
14206 without remembering whether it is marked, so here we always
14207 mark it. If there's actually no pending notification to
14208 process, this ends up being a no-op (other than a spurious
14209 event-loop wakeup). */
14210 if (target_is_non_stop_p ())
14211 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14215 serial_async (rs
->remote_desc
, NULL
, NULL
);
14216 /* If the core is disabling async, it doesn't want to be
14217 disturbed with target events. Clear all async event sources
14219 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14220 if (target_is_non_stop_p ())
14221 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14225 /* Implementation of the to_thread_events method. */
14228 remote_target::thread_events (int enable
)
14230 struct remote_state
*rs
= get_remote_state ();
14231 size_t size
= get_remote_packet_size ();
14233 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14236 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14238 getpkt (&rs
->buf
, 0);
14240 switch (packet_ok (rs
->buf
,
14241 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14244 if (strcmp (rs
->buf
.data (), "OK") != 0)
14245 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14248 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14250 case PACKET_UNKNOWN
:
14256 show_remote_cmd (const char *args
, int from_tty
)
14258 /* We can't just use cmd_show_list here, because we want to skip
14259 the redundant "show remote Z-packet" and the legacy aliases. */
14260 struct cmd_list_element
*list
= remote_show_cmdlist
;
14261 struct ui_out
*uiout
= current_uiout
;
14263 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14264 for (; list
!= NULL
; list
= list
->next
)
14265 if (strcmp (list
->name
, "Z-packet") == 0)
14267 else if (list
->type
== not_set_cmd
)
14268 /* Alias commands are exactly like the original, except they
14269 don't have the normal type. */
14273 ui_out_emit_tuple
option_emitter (uiout
, "option");
14275 uiout
->field_string ("name", list
->name
);
14276 uiout
->text (": ");
14277 if (list
->type
== show_cmd
)
14278 do_show_command (NULL
, from_tty
, list
);
14280 cmd_func (list
, NULL
, from_tty
);
14285 /* Function to be called whenever a new objfile (shlib) is detected. */
14287 remote_new_objfile (struct objfile
*objfile
)
14289 remote_target
*remote
= get_current_remote_target ();
14291 if (remote
!= NULL
) /* Have a remote connection. */
14292 remote
->remote_check_symbols ();
14295 /* Pull all the tracepoints defined on the target and create local
14296 data structures representing them. We don't want to create real
14297 tracepoints yet, we don't want to mess up the user's existing
14301 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14303 struct remote_state
*rs
= get_remote_state ();
14306 /* Ask for a first packet of tracepoint definition. */
14308 getpkt (&rs
->buf
, 0);
14309 p
= rs
->buf
.data ();
14310 while (*p
&& *p
!= 'l')
14312 parse_tracepoint_definition (p
, utpp
);
14313 /* Ask for another packet of tracepoint definition. */
14315 getpkt (&rs
->buf
, 0);
14316 p
= rs
->buf
.data ();
14322 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14324 struct remote_state
*rs
= get_remote_state ();
14327 /* Ask for a first packet of variable definition. */
14329 getpkt (&rs
->buf
, 0);
14330 p
= rs
->buf
.data ();
14331 while (*p
&& *p
!= 'l')
14333 parse_tsv_definition (p
, utsvp
);
14334 /* Ask for another packet of variable definition. */
14336 getpkt (&rs
->buf
, 0);
14337 p
= rs
->buf
.data ();
14342 /* The "set/show range-stepping" show hook. */
14345 show_range_stepping (struct ui_file
*file
, int from_tty
,
14346 struct cmd_list_element
*c
,
14349 fprintf_filtered (file
,
14350 _("Debugger's willingness to use range stepping "
14351 "is %s.\n"), value
);
14354 /* Return true if the vCont;r action is supported by the remote
14358 remote_target::vcont_r_supported ()
14360 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14361 remote_vcont_probe ();
14363 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14364 && get_remote_state ()->supports_vCont
.r
);
14367 /* The "set/show range-stepping" set hook. */
14370 set_range_stepping (const char *ignore_args
, int from_tty
,
14371 struct cmd_list_element
*c
)
14373 /* When enabling, check whether range stepping is actually supported
14374 by the target, and warn if not. */
14375 if (use_range_stepping
)
14377 remote_target
*remote
= get_current_remote_target ();
14379 || !remote
->vcont_r_supported ())
14380 warning (_("Range stepping is not supported by the current target"));
14384 void _initialize_remote ();
14386 _initialize_remote ()
14388 struct cmd_list_element
*cmd
;
14389 const char *cmd_name
;
14391 /* architecture specific data */
14392 remote_g_packet_data_handle
=
14393 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14395 add_target (remote_target_info
, remote_target::open
);
14396 add_target (extended_remote_target_info
, extended_remote_target::open
);
14398 /* Hook into new objfile notification. */
14399 gdb::observers::new_objfile
.attach (remote_new_objfile
);
14402 init_remote_threadtests ();
14405 /* set/show remote ... */
14407 add_basic_prefix_cmd ("remote", class_maintenance
, _("\
14408 Remote protocol specific variables.\n\
14409 Configure various remote-protocol specific variables such as\n\
14410 the packets being used."),
14411 &remote_set_cmdlist
, "set remote ",
14412 0 /* allow-unknown */, &setlist
);
14413 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14414 Remote protocol specific variables.\n\
14415 Configure various remote-protocol specific variables such as\n\
14416 the packets being used."),
14417 &remote_show_cmdlist
, "show remote ",
14418 0 /* allow-unknown */, &showlist
);
14420 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14421 Compare section data on target to the exec file.\n\
14422 Argument is a single section name (default: all loaded sections).\n\
14423 To compare only read-only loaded sections, specify the -r option."),
14426 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14427 Send an arbitrary packet to a remote target.\n\
14428 maintenance packet TEXT\n\
14429 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14430 this command sends the string TEXT to the inferior, and displays the\n\
14431 response packet. GDB supplies the initial `$' character, and the\n\
14432 terminating `#' character and checksum."),
14435 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14436 Set whether to send break if interrupted."), _("\
14437 Show whether to send break if interrupted."), _("\
14438 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14439 set_remotebreak
, show_remotebreak
,
14440 &setlist
, &showlist
);
14441 cmd_name
= "remotebreak";
14442 cmd
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
14443 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14444 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14445 cmd
= lookup_cmd (&cmd_name
, showlist
, "", NULL
, -1, 1);
14446 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14448 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14449 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14451 Set interrupt sequence to remote target."), _("\
14452 Show interrupt sequence to remote target."), _("\
14453 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14454 NULL
, show_interrupt_sequence
,
14455 &remote_set_cmdlist
,
14456 &remote_show_cmdlist
);
14458 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14459 &interrupt_on_connect
, _("\
14460 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14461 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14462 If set, interrupt sequence is sent to remote target."),
14464 &remote_set_cmdlist
, &remote_show_cmdlist
);
14466 /* Install commands for configuring memory read/write packets. */
14468 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14469 Set the maximum number of bytes per memory write packet (deprecated)."),
14471 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14472 Show the maximum number of bytes per memory write packet (deprecated)."),
14474 add_cmd ("memory-write-packet-size", no_class
,
14475 set_memory_write_packet_size
, _("\
14476 Set the maximum number of bytes per memory-write packet.\n\
14477 Specify the number of bytes in a packet or 0 (zero) for the\n\
14478 default packet size. The actual limit is further reduced\n\
14479 dependent on the target. Specify ``fixed'' to disable the\n\
14480 further restriction and ``limit'' to enable that restriction."),
14481 &remote_set_cmdlist
);
14482 add_cmd ("memory-read-packet-size", no_class
,
14483 set_memory_read_packet_size
, _("\
14484 Set the maximum number of bytes per memory-read packet.\n\
14485 Specify the number of bytes in a packet or 0 (zero) for the\n\
14486 default packet size. The actual limit is further reduced\n\
14487 dependent on the target. Specify ``fixed'' to disable the\n\
14488 further restriction and ``limit'' to enable that restriction."),
14489 &remote_set_cmdlist
);
14490 add_cmd ("memory-write-packet-size", no_class
,
14491 show_memory_write_packet_size
,
14492 _("Show the maximum number of bytes per memory-write packet."),
14493 &remote_show_cmdlist
);
14494 add_cmd ("memory-read-packet-size", no_class
,
14495 show_memory_read_packet_size
,
14496 _("Show the maximum number of bytes per memory-read packet."),
14497 &remote_show_cmdlist
);
14499 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14500 &remote_hw_watchpoint_limit
, _("\
14501 Set the maximum number of target hardware watchpoints."), _("\
14502 Show the maximum number of target hardware watchpoints."), _("\
14503 Specify \"unlimited\" for unlimited hardware watchpoints."),
14504 NULL
, show_hardware_watchpoint_limit
,
14505 &remote_set_cmdlist
,
14506 &remote_show_cmdlist
);
14507 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14509 &remote_hw_watchpoint_length_limit
, _("\
14510 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14511 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14512 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14513 NULL
, show_hardware_watchpoint_length_limit
,
14514 &remote_set_cmdlist
, &remote_show_cmdlist
);
14515 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14516 &remote_hw_breakpoint_limit
, _("\
14517 Set the maximum number of target hardware breakpoints."), _("\
14518 Show the maximum number of target hardware breakpoints."), _("\
14519 Specify \"unlimited\" for unlimited hardware breakpoints."),
14520 NULL
, show_hardware_breakpoint_limit
,
14521 &remote_set_cmdlist
, &remote_show_cmdlist
);
14523 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14524 &remote_address_size
, _("\
14525 Set the maximum size of the address (in bits) in a memory packet."), _("\
14526 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14528 NULL
, /* FIXME: i18n: */
14529 &setlist
, &showlist
);
14531 init_all_packet_configs ();
14533 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14534 "X", "binary-download", 1);
14536 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14537 "vCont", "verbose-resume", 0);
14539 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14540 "QPassSignals", "pass-signals", 0);
14542 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14543 "QCatchSyscalls", "catch-syscalls", 0);
14545 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14546 "QProgramSignals", "program-signals", 0);
14548 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14549 "QSetWorkingDir", "set-working-dir", 0);
14551 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14552 "QStartupWithShell", "startup-with-shell", 0);
14554 add_packet_config_cmd (&remote_protocol_packets
14555 [PACKET_QEnvironmentHexEncoded
],
14556 "QEnvironmentHexEncoded", "environment-hex-encoded",
14559 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14560 "QEnvironmentReset", "environment-reset",
14563 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14564 "QEnvironmentUnset", "environment-unset",
14567 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14568 "qSymbol", "symbol-lookup", 0);
14570 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14571 "P", "set-register", 1);
14573 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14574 "p", "fetch-register", 1);
14576 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14577 "Z0", "software-breakpoint", 0);
14579 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14580 "Z1", "hardware-breakpoint", 0);
14582 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14583 "Z2", "write-watchpoint", 0);
14585 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14586 "Z3", "read-watchpoint", 0);
14588 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14589 "Z4", "access-watchpoint", 0);
14591 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14592 "qXfer:auxv:read", "read-aux-vector", 0);
14594 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14595 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14597 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14598 "qXfer:features:read", "target-features", 0);
14600 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14601 "qXfer:libraries:read", "library-info", 0);
14603 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14604 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14606 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14607 "qXfer:memory-map:read", "memory-map", 0);
14609 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14610 "qXfer:osdata:read", "osdata", 0);
14612 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14613 "qXfer:threads:read", "threads", 0);
14615 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14616 "qXfer:siginfo:read", "read-siginfo-object", 0);
14618 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14619 "qXfer:siginfo:write", "write-siginfo-object", 0);
14621 add_packet_config_cmd
14622 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14623 "qXfer:traceframe-info:read", "traceframe-info", 0);
14625 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14626 "qXfer:uib:read", "unwind-info-block", 0);
14628 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14629 "qGetTLSAddr", "get-thread-local-storage-address",
14632 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14633 "qGetTIBAddr", "get-thread-information-block-address",
14636 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14637 "bc", "reverse-continue", 0);
14639 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14640 "bs", "reverse-step", 0);
14642 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14643 "qSupported", "supported-packets", 0);
14645 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14646 "qSearch:memory", "search-memory", 0);
14648 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14649 "qTStatus", "trace-status", 0);
14651 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14652 "vFile:setfs", "hostio-setfs", 0);
14654 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14655 "vFile:open", "hostio-open", 0);
14657 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14658 "vFile:pread", "hostio-pread", 0);
14660 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14661 "vFile:pwrite", "hostio-pwrite", 0);
14663 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14664 "vFile:close", "hostio-close", 0);
14666 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14667 "vFile:unlink", "hostio-unlink", 0);
14669 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14670 "vFile:readlink", "hostio-readlink", 0);
14672 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14673 "vFile:fstat", "hostio-fstat", 0);
14675 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14676 "vAttach", "attach", 0);
14678 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14681 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14682 "QStartNoAckMode", "noack", 0);
14684 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14685 "vKill", "kill", 0);
14687 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14688 "qAttached", "query-attached", 0);
14690 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14691 "ConditionalTracepoints",
14692 "conditional-tracepoints", 0);
14694 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14695 "ConditionalBreakpoints",
14696 "conditional-breakpoints", 0);
14698 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14699 "BreakpointCommands",
14700 "breakpoint-commands", 0);
14702 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14703 "FastTracepoints", "fast-tracepoints", 0);
14705 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14706 "TracepointSource", "TracepointSource", 0);
14708 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14709 "QAllow", "allow", 0);
14711 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14712 "StaticTracepoints", "static-tracepoints", 0);
14714 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14715 "InstallInTrace", "install-in-trace", 0);
14717 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14718 "qXfer:statictrace:read", "read-sdata-object", 0);
14720 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14721 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14723 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14724 "QDisableRandomization", "disable-randomization", 0);
14726 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14727 "QAgent", "agent", 0);
14729 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14730 "QTBuffer:size", "trace-buffer-size", 0);
14732 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14733 "Qbtrace:off", "disable-btrace", 0);
14735 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14736 "Qbtrace:bts", "enable-btrace-bts", 0);
14738 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14739 "Qbtrace:pt", "enable-btrace-pt", 0);
14741 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14742 "qXfer:btrace", "read-btrace", 0);
14744 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14745 "qXfer:btrace-conf", "read-btrace-conf", 0);
14747 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14748 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14750 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14751 "multiprocess-feature", "multiprocess-feature", 0);
14753 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14754 "swbreak-feature", "swbreak-feature", 0);
14756 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14757 "hwbreak-feature", "hwbreak-feature", 0);
14759 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14760 "fork-event-feature", "fork-event-feature", 0);
14762 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14763 "vfork-event-feature", "vfork-event-feature", 0);
14765 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14766 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14768 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14769 "vContSupported", "verbose-resume-supported", 0);
14771 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14772 "exec-event-feature", "exec-event-feature", 0);
14774 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14775 "vCtrlC", "ctrl-c", 0);
14777 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14778 "QThreadEvents", "thread-events", 0);
14780 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14781 "N stop reply", "no-resumed-stop-reply", 0);
14783 /* Assert that we've registered "set remote foo-packet" commands
14784 for all packet configs. */
14788 for (i
= 0; i
< PACKET_MAX
; i
++)
14790 /* Ideally all configs would have a command associated. Some
14791 still don't though. */
14796 case PACKET_QNonStop
:
14797 case PACKET_EnableDisableTracepoints_feature
:
14798 case PACKET_tracenz_feature
:
14799 case PACKET_DisconnectedTracing_feature
:
14800 case PACKET_augmented_libraries_svr4_read_feature
:
14802 /* Additions to this list need to be well justified:
14803 pre-existing packets are OK; new packets are not. */
14811 /* This catches both forgetting to add a config command, and
14812 forgetting to remove a packet from the exception list. */
14813 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14817 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14818 Z sub-packet has its own set and show commands, but users may
14819 have sets to this variable in their .gdbinit files (or in their
14821 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14822 &remote_Z_packet_detect
, _("\
14823 Set use of remote protocol `Z' packets."), _("\
14824 Show use of remote protocol `Z' packets."), _("\
14825 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14827 set_remote_protocol_Z_packet_cmd
,
14828 show_remote_protocol_Z_packet_cmd
,
14829 /* FIXME: i18n: Use of remote protocol
14830 `Z' packets is %s. */
14831 &remote_set_cmdlist
, &remote_show_cmdlist
);
14833 add_basic_prefix_cmd ("remote", class_files
, _("\
14834 Manipulate files on the remote system.\n\
14835 Transfer files to and from the remote target system."),
14836 &remote_cmdlist
, "remote ",
14837 0 /* allow-unknown */, &cmdlist
);
14839 add_cmd ("put", class_files
, remote_put_command
,
14840 _("Copy a local file to the remote system."),
14843 add_cmd ("get", class_files
, remote_get_command
,
14844 _("Copy a remote file to the local system."),
14847 add_cmd ("delete", class_files
, remote_delete_command
,
14848 _("Delete a remote file."),
14851 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14852 &remote_exec_file_var
, _("\
14853 Set the remote pathname for \"run\"."), _("\
14854 Show the remote pathname for \"run\"."), NULL
,
14855 set_remote_exec_file
,
14856 show_remote_exec_file
,
14857 &remote_set_cmdlist
,
14858 &remote_show_cmdlist
);
14860 add_setshow_boolean_cmd ("range-stepping", class_run
,
14861 &use_range_stepping
, _("\
14862 Enable or disable range stepping."), _("\
14863 Show whether target-assisted range stepping is enabled."), _("\
14864 If on, and the target supports it, when stepping a source line, GDB\n\
14865 tells the target to step the corresponding range of addresses itself instead\n\
14866 of issuing multiple single-steps. This speeds up source level\n\
14867 stepping. If off, GDB always issues single-steps, even if range\n\
14868 stepping is supported by the target. The default is on."),
14869 set_range_stepping
,
14870 show_range_stepping
,
14874 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
14875 Set watchdog timer."), _("\
14876 Show watchdog timer."), _("\
14877 When non-zero, this timeout is used instead of waiting forever for a target\n\
14878 to finish a low-level step or continue operation. If the specified amount\n\
14879 of time passes without a response from the target, an error occurs."),
14882 &setlist
, &showlist
);
14884 add_setshow_zuinteger_unlimited_cmd ("remote-packet-max-chars", no_class
,
14885 &remote_packet_max_chars
, _("\
14886 Set the maximum number of characters to display for each remote packet."), _("\
14887 Show the maximum number of characters to display for each remote packet."), _("\
14888 Specify \"unlimited\" to display all the characters."),
14889 NULL
, show_remote_packet_max_chars
,
14890 &setdebuglist
, &showdebuglist
);
14892 /* Eventually initialize fileio. See fileio.c */
14893 initialize_remote_fileio (&remote_set_cmdlist
, &remote_show_cmdlist
);