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
*, int) 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
,
743 ptid_t
wait_as (ptid_t ptid
, target_waitstatus
*status
,
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
);
2496 remote_add_thread (currthread
, running
, executing
);
2497 inferior_ptid
= currthread
;
2502 if (magic_null_ptid
== inferior_ptid
)
2504 /* inferior_ptid is not set yet. This can happen with the
2505 vRun -> remote_wait,"TAAthread:" path if the stub
2506 doesn't support qC. This is the first stop reported
2507 after an attach, so this is the main thread. Update the
2508 ptid in the thread list. */
2509 thread_change_ptid (this, inferior_ptid
, currthread
);
2513 /* When connecting to a target remote, or to a target
2514 extended-remote which already was debugging an inferior, we
2515 may not know about it yet. Add it before adding its child
2516 thread, so notifications are emitted in a sensible order. */
2517 if (find_inferior_pid (this, currthread
.pid ()) == NULL
)
2519 struct remote_state
*rs
= get_remote_state ();
2520 bool fake_pid_p
= !remote_multi_process_p (rs
);
2522 inf
= remote_add_inferior (fake_pid_p
,
2523 currthread
.pid (), -1, 1);
2526 /* This is really a new thread. Add it. */
2527 thread_info
*new_thr
2528 = remote_add_thread (currthread
, running
, executing
);
2530 /* If we found a new inferior, let the common code do whatever
2531 it needs to with it (e.g., read shared libraries, insert
2532 breakpoints), unless we're just setting up an all-stop
2536 struct remote_state
*rs
= get_remote_state ();
2538 if (!rs
->starting_up
)
2539 notice_new_inferior (new_thr
, executing
, 0);
2544 /* Return THREAD's private thread data, creating it if necessary. */
2546 static remote_thread_info
*
2547 get_remote_thread_info (thread_info
*thread
)
2549 gdb_assert (thread
!= NULL
);
2551 if (thread
->priv
== NULL
)
2552 thread
->priv
.reset (new remote_thread_info
);
2554 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
2557 /* Return PTID's private thread data, creating it if necessary. */
2559 static remote_thread_info
*
2560 get_remote_thread_info (remote_target
*target
, ptid_t ptid
)
2562 thread_info
*thr
= find_thread_ptid (target
, ptid
);
2563 return get_remote_thread_info (thr
);
2566 /* Call this function as a result of
2567 1) A halt indication (T packet) containing a thread id
2568 2) A direct query of currthread
2569 3) Successful execution of set thread */
2572 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2574 rs
->general_thread
= currthread
;
2577 /* If 'QPassSignals' is supported, tell the remote stub what signals
2578 it can simply pass through to the inferior without reporting. */
2581 remote_target::pass_signals (gdb::array_view
<const unsigned char> pass_signals
)
2583 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2585 char *pass_packet
, *p
;
2587 struct remote_state
*rs
= get_remote_state ();
2589 gdb_assert (pass_signals
.size () < 256);
2590 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2592 if (pass_signals
[i
])
2595 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2596 strcpy (pass_packet
, "QPassSignals:");
2597 p
= pass_packet
+ strlen (pass_packet
);
2598 for (size_t i
= 0; i
< pass_signals
.size (); i
++)
2600 if (pass_signals
[i
])
2603 *p
++ = tohex (i
>> 4);
2604 *p
++ = tohex (i
& 15);
2613 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2615 putpkt (pass_packet
);
2616 getpkt (&rs
->buf
, 0);
2617 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2618 if (rs
->last_pass_packet
)
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 /* Implement the to_update_thread_list function for the remote
3792 remote_target::update_thread_list ()
3794 struct threads_listing_context context
;
3797 /* We have a few different mechanisms to fetch the thread list. Try
3798 them all, starting with the most preferred one first, falling
3799 back to older methods. */
3800 if (remote_get_threads_with_qxfer (&context
)
3801 || remote_get_threads_with_qthreadinfo (&context
)
3802 || remote_get_threads_with_ql (&context
))
3806 if (context
.items
.empty ()
3807 && remote_thread_always_alive (inferior_ptid
))
3809 /* Some targets don't really support threads, but still
3810 reply an (empty) thread list in response to the thread
3811 listing packets, instead of replying "packet not
3812 supported". Exit early so we don't delete the main
3817 /* CONTEXT now holds the current thread list on the remote
3818 target end. Delete GDB-side threads no longer found on the
3820 for (thread_info
*tp
: all_threads_safe ())
3822 if (tp
->inf
->process_target () != this)
3825 if (!context
.contains_thread (tp
->ptid
))
3832 /* Remove any unreported fork child threads from CONTEXT so
3833 that we don't interfere with follow fork, which is where
3834 creation of such threads is handled. */
3835 remove_new_fork_children (&context
);
3837 /* And now add threads we don't know about yet to our list. */
3838 for (thread_item
&item
: context
.items
)
3840 if (item
.ptid
!= null_ptid
)
3842 /* In non-stop mode, we assume new found threads are
3843 executing until proven otherwise with a stop reply.
3844 In all-stop, we can only get here if all threads are
3846 int executing
= target_is_non_stop_p () ? 1 : 0;
3848 remote_notice_new_inferior (item
.ptid
, executing
);
3850 thread_info
*tp
= find_thread_ptid (this, item
.ptid
);
3851 remote_thread_info
*info
= get_remote_thread_info (tp
);
3852 info
->core
= item
.core
;
3853 info
->extra
= std::move (item
.extra
);
3854 info
->name
= std::move (item
.name
);
3855 info
->thread_handle
= std::move (item
.thread_handle
);
3862 /* If no thread listing method is supported, then query whether
3863 each known thread is alive, one by one, with the T packet.
3864 If the target doesn't support threads at all, then this is a
3865 no-op. See remote_thread_alive. */
3871 * Collect a descriptive string about the given thread.
3872 * The target may say anything it wants to about the thread
3873 * (typically info about its blocked / runnable state, name, etc.).
3874 * This string will appear in the info threads display.
3876 * Optional: targets are not required to implement this function.
3880 remote_target::extra_thread_info (thread_info
*tp
)
3882 struct remote_state
*rs
= get_remote_state ();
3885 struct gdb_ext_thread_info threadinfo
;
3887 if (rs
->remote_desc
== 0) /* paranoia */
3888 internal_error (__FILE__
, __LINE__
,
3889 _("remote_threads_extra_info"));
3891 if (tp
->ptid
== magic_null_ptid
3892 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
3893 /* This is the main thread which was added by GDB. The remote
3894 server doesn't know about it. */
3897 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
3899 /* If already have cached info, use it. */
3900 if (!extra
.empty ())
3901 return extra
.c_str ();
3903 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3905 /* If we're using qXfer:threads:read, then the extra info is
3906 included in the XML. So if we didn't have anything cached,
3907 it's because there's really no extra info. */
3911 if (rs
->use_threadextra_query
)
3913 char *b
= rs
->buf
.data ();
3914 char *endb
= b
+ get_remote_packet_size ();
3916 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3918 write_ptid (b
, endb
, tp
->ptid
);
3921 getpkt (&rs
->buf
, 0);
3922 if (rs
->buf
[0] != 0)
3924 extra
.resize (strlen (rs
->buf
.data ()) / 2);
3925 hex2bin (rs
->buf
.data (), (gdb_byte
*) &extra
[0], extra
.size ());
3926 return extra
.c_str ();
3930 /* If the above query fails, fall back to the old method. */
3931 rs
->use_threadextra_query
= 0;
3932 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3933 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3934 int_to_threadref (&id
, tp
->ptid
.lwp ());
3935 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3936 if (threadinfo
.active
)
3938 if (*threadinfo
.shortname
)
3939 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
3940 if (*threadinfo
.display
)
3942 if (!extra
.empty ())
3944 string_appendf (extra
, " State: %s", threadinfo
.display
);
3946 if (*threadinfo
.more_display
)
3948 if (!extra
.empty ())
3950 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
3952 return extra
.c_str ();
3959 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
3960 struct static_tracepoint_marker
*marker
)
3962 struct remote_state
*rs
= get_remote_state ();
3963 char *p
= rs
->buf
.data ();
3965 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3967 p
+= hexnumstr (p
, addr
);
3969 getpkt (&rs
->buf
, 0);
3970 p
= rs
->buf
.data ();
3973 error (_("Remote failure reply: %s"), p
);
3977 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
3984 std::vector
<static_tracepoint_marker
>
3985 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
3987 struct remote_state
*rs
= get_remote_state ();
3988 std::vector
<static_tracepoint_marker
> markers
;
3990 static_tracepoint_marker marker
;
3992 /* Ask for a first packet of static tracepoint marker
3995 getpkt (&rs
->buf
, 0);
3996 p
= rs
->buf
.data ();
3998 error (_("Remote failure reply: %s"), p
);
4004 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
4006 if (strid
== NULL
|| marker
.str_id
== strid
)
4007 markers
.push_back (std::move (marker
));
4009 while (*p
++ == ','); /* comma-separated list */
4010 /* Ask for another packet of static tracepoint definition. */
4012 getpkt (&rs
->buf
, 0);
4013 p
= rs
->buf
.data ();
4020 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4023 remote_target::get_ada_task_ptid (long lwp
, long thread
)
4025 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
4029 /* Restart the remote side; this is an extended protocol operation. */
4032 remote_target::extended_remote_restart ()
4034 struct remote_state
*rs
= get_remote_state ();
4036 /* Send the restart command; for reasons I don't understand the
4037 remote side really expects a number after the "R". */
4038 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "R%x", 0);
4041 remote_fileio_reset ();
4044 /* Clean up connection to a remote debugger. */
4047 remote_target::close ()
4049 /* Make sure we leave stdin registered in the event loop. */
4052 trace_reset_local_state ();
4057 remote_target::~remote_target ()
4059 struct remote_state
*rs
= get_remote_state ();
4061 /* Check for NULL because we may get here with a partially
4062 constructed target/connection. */
4063 if (rs
->remote_desc
== nullptr)
4066 serial_close (rs
->remote_desc
);
4068 /* We are destroying the remote target, so we should discard
4069 everything of this target. */
4070 discard_pending_stop_replies_in_queue ();
4072 if (rs
->remote_async_inferior_event_token
)
4073 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4075 delete rs
->notif_state
;
4078 /* Query the remote side for the text, data and bss offsets. */
4081 remote_target::get_offsets ()
4083 struct remote_state
*rs
= get_remote_state ();
4086 int lose
, num_segments
= 0, do_sections
, do_segments
;
4087 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4088 struct symfile_segment_data
*data
;
4090 if (symfile_objfile
== NULL
)
4093 putpkt ("qOffsets");
4094 getpkt (&rs
->buf
, 0);
4095 buf
= rs
->buf
.data ();
4097 if (buf
[0] == '\000')
4098 return; /* Return silently. Stub doesn't support
4102 warning (_("Remote failure reply: %s"), buf
);
4106 /* Pick up each field in turn. This used to be done with scanf, but
4107 scanf will make trouble if CORE_ADDR size doesn't match
4108 conversion directives correctly. The following code will work
4109 with any size of CORE_ADDR. */
4110 text_addr
= data_addr
= bss_addr
= 0;
4114 if (startswith (ptr
, "Text="))
4117 /* Don't use strtol, could lose on big values. */
4118 while (*ptr
&& *ptr
!= ';')
4119 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4121 if (startswith (ptr
, ";Data="))
4124 while (*ptr
&& *ptr
!= ';')
4125 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4130 if (!lose
&& startswith (ptr
, ";Bss="))
4133 while (*ptr
&& *ptr
!= ';')
4134 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4136 if (bss_addr
!= data_addr
)
4137 warning (_("Target reported unsupported offsets: %s"), buf
);
4142 else if (startswith (ptr
, "TextSeg="))
4145 /* Don't use strtol, could lose on big values. */
4146 while (*ptr
&& *ptr
!= ';')
4147 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4150 if (startswith (ptr
, ";DataSeg="))
4153 while (*ptr
&& *ptr
!= ';')
4154 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4162 error (_("Malformed response to offset query, %s"), buf
);
4163 else if (*ptr
!= '\0')
4164 warning (_("Target reported unsupported offsets: %s"), buf
);
4166 section_offsets offs
= symfile_objfile
->section_offsets
;
4168 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
4169 do_segments
= (data
!= NULL
);
4170 do_sections
= num_segments
== 0;
4172 if (num_segments
> 0)
4174 segments
[0] = text_addr
;
4175 segments
[1] = data_addr
;
4177 /* If we have two segments, we can still try to relocate everything
4178 by assuming that the .text and .data offsets apply to the whole
4179 text and data segments. Convert the offsets given in the packet
4180 to base addresses for symfile_map_offsets_to_segments. */
4181 else if (data
&& data
->num_segments
== 2)
4183 segments
[0] = data
->segment_bases
[0] + text_addr
;
4184 segments
[1] = data
->segment_bases
[1] + data_addr
;
4187 /* If the object file has only one segment, assume that it is text
4188 rather than data; main programs with no writable data are rare,
4189 but programs with no code are useless. Of course the code might
4190 have ended up in the data segment... to detect that we would need
4191 the permissions here. */
4192 else if (data
&& data
->num_segments
== 1)
4194 segments
[0] = data
->segment_bases
[0] + text_addr
;
4197 /* There's no way to relocate by segment. */
4203 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
4204 offs
, num_segments
, segments
);
4206 if (ret
== 0 && !do_sections
)
4207 error (_("Can not handle qOffsets TextSeg "
4208 "response with this symbol file"));
4215 free_symfile_segment_data (data
);
4219 offs
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
4221 /* This is a temporary kludge to force data and bss to use the
4222 same offsets because that's what nlmconv does now. The real
4223 solution requires changes to the stub and remote.c that I
4224 don't have time to do right now. */
4226 offs
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
4227 offs
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
4230 objfile_relocate (symfile_objfile
, offs
);
4233 /* Send interrupt_sequence to remote target. */
4236 remote_target::send_interrupt_sequence ()
4238 struct remote_state
*rs
= get_remote_state ();
4240 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4241 remote_serial_write ("\x03", 1);
4242 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4243 serial_send_break (rs
->remote_desc
);
4244 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4246 serial_send_break (rs
->remote_desc
);
4247 remote_serial_write ("g", 1);
4250 internal_error (__FILE__
, __LINE__
,
4251 _("Invalid value for interrupt_sequence_mode: %s."),
4252 interrupt_sequence_mode
);
4256 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4257 and extract the PTID. Returns NULL_PTID if not found. */
4260 stop_reply_extract_thread (char *stop_reply
)
4262 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4266 /* Txx r:val ; r:val (...) */
4269 /* Look for "register" named "thread". */
4274 p1
= strchr (p
, ':');
4278 if (strncmp (p
, "thread", p1
- p
) == 0)
4279 return read_ptid (++p1
, &p
);
4281 p1
= strchr (p
, ';');
4293 /* Determine the remote side's current thread. If we have a stop
4294 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4295 "thread" register we can extract the current thread from. If not,
4296 ask the remote which is the current thread with qC. The former
4297 method avoids a roundtrip. */
4300 remote_target::get_current_thread (char *wait_status
)
4302 ptid_t ptid
= null_ptid
;
4304 /* Note we don't use remote_parse_stop_reply as that makes use of
4305 the target architecture, which we haven't yet fully determined at
4307 if (wait_status
!= NULL
)
4308 ptid
= stop_reply_extract_thread (wait_status
);
4309 if (ptid
== null_ptid
)
4310 ptid
= remote_current_thread (inferior_ptid
);
4315 /* Query the remote target for which is the current thread/process,
4316 add it to our tables, and update INFERIOR_PTID. The caller is
4317 responsible for setting the state such that the remote end is ready
4318 to return the current thread.
4320 This function is called after handling the '?' or 'vRun' packets,
4321 whose response is a stop reply from which we can also try
4322 extracting the thread. If the target doesn't support the explicit
4323 qC query, we infer the current thread from that stop reply, passed
4324 in in WAIT_STATUS, which may be NULL. */
4327 remote_target::add_current_inferior_and_thread (char *wait_status
)
4329 struct remote_state
*rs
= get_remote_state ();
4330 bool fake_pid_p
= false;
4332 inferior_ptid
= null_ptid
;
4334 /* Now, if we have thread information, update inferior_ptid. */
4335 ptid_t curr_ptid
= get_current_thread (wait_status
);
4337 if (curr_ptid
!= null_ptid
)
4339 if (!remote_multi_process_p (rs
))
4344 /* Without this, some commands which require an active target
4345 (such as kill) won't work. This variable serves (at least)
4346 double duty as both the pid of the target process (if it has
4347 such), and as a flag indicating that a target is active. */
4348 curr_ptid
= magic_null_ptid
;
4352 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4354 /* Add the main thread and switch to it. Don't try reading
4355 registers yet, since we haven't fetched the target description
4357 thread_info
*tp
= add_thread_silent (this, curr_ptid
);
4358 switch_to_thread_no_regs (tp
);
4361 /* Print info about a thread that was found already stopped on
4365 print_one_stopped_thread (struct thread_info
*thread
)
4367 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
4369 switch_to_thread (thread
);
4370 thread
->suspend
.stop_pc
= get_frame_pc (get_current_frame ());
4371 set_current_sal_from_frame (get_current_frame ());
4373 thread
->suspend
.waitstatus_pending_p
= 0;
4375 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
4377 enum gdb_signal sig
= ws
->value
.sig
;
4379 if (signal_print_state (sig
))
4380 gdb::observers::signal_received
.notify (sig
);
4382 gdb::observers::normal_stop
.notify (NULL
, 1);
4385 /* Process all initial stop replies the remote side sent in response
4386 to the ? packet. These indicate threads that were already stopped
4387 on initial connection. We mark these threads as stopped and print
4388 their current frame before giving the user the prompt. */
4391 remote_target::process_initial_stop_replies (int from_tty
)
4393 int pending_stop_replies
= stop_reply_queue_length ();
4394 struct thread_info
*selected
= NULL
;
4395 struct thread_info
*lowest_stopped
= NULL
;
4396 struct thread_info
*first
= NULL
;
4398 /* Consume the initial pending events. */
4399 while (pending_stop_replies
-- > 0)
4401 ptid_t waiton_ptid
= minus_one_ptid
;
4403 struct target_waitstatus ws
;
4404 int ignore_event
= 0;
4406 memset (&ws
, 0, sizeof (ws
));
4407 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4409 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4413 case TARGET_WAITKIND_IGNORE
:
4414 case TARGET_WAITKIND_NO_RESUMED
:
4415 case TARGET_WAITKIND_SIGNALLED
:
4416 case TARGET_WAITKIND_EXITED
:
4417 /* We shouldn't see these, but if we do, just ignore. */
4419 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
4423 case TARGET_WAITKIND_EXECD
:
4424 xfree (ws
.value
.execd_pathname
);
4433 thread_info
*evthread
= find_thread_ptid (this, event_ptid
);
4435 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4437 enum gdb_signal sig
= ws
.value
.sig
;
4439 /* Stubs traditionally report SIGTRAP as initial signal,
4440 instead of signal 0. Suppress it. */
4441 if (sig
== GDB_SIGNAL_TRAP
)
4443 evthread
->suspend
.stop_signal
= sig
;
4447 evthread
->suspend
.waitstatus
= ws
;
4449 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4450 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4451 evthread
->suspend
.waitstatus_pending_p
= 1;
4453 set_executing (this, event_ptid
, false);
4454 set_running (this, event_ptid
, false);
4455 get_remote_thread_info (evthread
)->vcont_resumed
= 0;
4458 /* "Notice" the new inferiors before anything related to
4459 registers/memory. */
4460 for (inferior
*inf
: all_non_exited_inferiors (this))
4462 inf
->needs_setup
= 1;
4466 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4467 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4472 /* If all-stop on top of non-stop, pause all threads. Note this
4473 records the threads' stop pc, so must be done after "noticing"
4477 stop_all_threads ();
4479 /* If all threads of an inferior were already stopped, we
4480 haven't setup the inferior yet. */
4481 for (inferior
*inf
: all_non_exited_inferiors (this))
4483 if (inf
->needs_setup
)
4485 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4486 switch_to_thread_no_regs (thread
);
4492 /* Now go over all threads that are stopped, and print their current
4493 frame. If all-stop, then if there's a signalled thread, pick
4495 for (thread_info
*thread
: all_non_exited_threads (this))
4501 thread
->set_running (false);
4502 else if (thread
->state
!= THREAD_STOPPED
)
4505 if (selected
== NULL
4506 && thread
->suspend
.waitstatus_pending_p
)
4509 if (lowest_stopped
== NULL
4510 || thread
->inf
->num
< lowest_stopped
->inf
->num
4511 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4512 lowest_stopped
= thread
;
4515 print_one_stopped_thread (thread
);
4518 /* In all-stop, we only print the status of one thread, and leave
4519 others with their status pending. */
4522 thread_info
*thread
= selected
;
4524 thread
= lowest_stopped
;
4528 print_one_stopped_thread (thread
);
4531 /* For "info program". */
4532 thread_info
*thread
= inferior_thread ();
4533 if (thread
->state
== THREAD_STOPPED
)
4534 set_last_target_status (this, inferior_ptid
, thread
->suspend
.waitstatus
);
4537 /* Start the remote connection and sync state. */
4540 remote_target::start_remote (int from_tty
, int extended_p
)
4542 struct remote_state
*rs
= get_remote_state ();
4543 struct packet_config
*noack_config
;
4544 char *wait_status
= NULL
;
4546 /* Signal other parts that we're going through the initial setup,
4547 and so things may not be stable yet. E.g., we don't try to
4548 install tracepoints until we've relocated symbols. Also, a
4549 Ctrl-C before we're connected and synced up can't interrupt the
4550 target. Instead, it offers to drop the (potentially wedged)
4552 rs
->starting_up
= 1;
4556 if (interrupt_on_connect
)
4557 send_interrupt_sequence ();
4559 /* Ack any packet which the remote side has already sent. */
4560 remote_serial_write ("+", 1);
4562 /* The first packet we send to the target is the optional "supported
4563 packets" request. If the target can answer this, it will tell us
4564 which later probes to skip. */
4565 remote_query_supported ();
4567 /* If the stub wants to get a QAllow, compose one and send it. */
4568 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4571 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4572 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4573 as a reply to known packet. For packet "vFile:setfs:" it is an
4574 invalid reply and GDB would return error in
4575 remote_hostio_set_filesystem, making remote files access impossible.
4576 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4577 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4579 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4581 putpkt (v_mustreplyempty
);
4582 getpkt (&rs
->buf
, 0);
4583 if (strcmp (rs
->buf
.data (), "OK") == 0)
4584 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4585 else if (strcmp (rs
->buf
.data (), "") != 0)
4586 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4590 /* Next, we possibly activate noack mode.
4592 If the QStartNoAckMode packet configuration is set to AUTO,
4593 enable noack mode if the stub reported a wish for it with
4596 If set to TRUE, then enable noack mode even if the stub didn't
4597 report it in qSupported. If the stub doesn't reply OK, the
4598 session ends with an error.
4600 If FALSE, then don't activate noack mode, regardless of what the
4601 stub claimed should be the default with qSupported. */
4603 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4604 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4606 putpkt ("QStartNoAckMode");
4607 getpkt (&rs
->buf
, 0);
4608 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4614 /* Tell the remote that we are using the extended protocol. */
4616 getpkt (&rs
->buf
, 0);
4619 /* Let the target know which signals it is allowed to pass down to
4621 update_signals_program_target ();
4623 /* Next, if the target can specify a description, read it. We do
4624 this before anything involving memory or registers. */
4625 target_find_description ();
4627 /* Next, now that we know something about the target, update the
4628 address spaces in the program spaces. */
4629 update_address_spaces ();
4631 /* On OSs where the list of libraries is global to all
4632 processes, we fetch them early. */
4633 if (gdbarch_has_global_solist (target_gdbarch ()))
4634 solib_add (NULL
, from_tty
, auto_solib_add
);
4636 if (target_is_non_stop_p ())
4638 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4639 error (_("Non-stop mode requested, but remote "
4640 "does not support non-stop"));
4642 putpkt ("QNonStop:1");
4643 getpkt (&rs
->buf
, 0);
4645 if (strcmp (rs
->buf
.data (), "OK") != 0)
4646 error (_("Remote refused setting non-stop mode with: %s"),
4649 /* Find about threads and processes the stub is already
4650 controlling. We default to adding them in the running state.
4651 The '?' query below will then tell us about which threads are
4653 this->update_thread_list ();
4655 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4657 /* Don't assume that the stub can operate in all-stop mode.
4658 Request it explicitly. */
4659 putpkt ("QNonStop:0");
4660 getpkt (&rs
->buf
, 0);
4662 if (strcmp (rs
->buf
.data (), "OK") != 0)
4663 error (_("Remote refused setting all-stop mode with: %s"),
4667 /* Upload TSVs regardless of whether the target is running or not. The
4668 remote stub, such as GDBserver, may have some predefined or builtin
4669 TSVs, even if the target is not running. */
4670 if (get_trace_status (current_trace_status ()) != -1)
4672 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4674 upload_trace_state_variables (&uploaded_tsvs
);
4675 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4678 /* Check whether the target is running now. */
4680 getpkt (&rs
->buf
, 0);
4682 if (!target_is_non_stop_p ())
4684 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4687 error (_("The target is not running (try extended-remote?)"));
4689 /* We're connected, but not running. Drop out before we
4690 call start_remote. */
4691 rs
->starting_up
= 0;
4696 /* Save the reply for later. */
4697 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4698 strcpy (wait_status
, rs
->buf
.data ());
4701 /* Fetch thread list. */
4702 target_update_thread_list ();
4704 /* Let the stub know that we want it to return the thread. */
4705 set_continue_thread (minus_one_ptid
);
4707 if (thread_count (this) == 0)
4709 /* Target has no concept of threads at all. GDB treats
4710 non-threaded target as single-threaded; add a main
4712 add_current_inferior_and_thread (wait_status
);
4716 /* We have thread information; select the thread the target
4717 says should be current. If we're reconnecting to a
4718 multi-threaded program, this will ideally be the thread
4719 that last reported an event before GDB disconnected. */
4720 ptid_t curr_thread
= get_current_thread (wait_status
);
4721 if (curr_thread
== null_ptid
)
4723 /* Odd... The target was able to list threads, but not
4724 tell us which thread was current (no "thread"
4725 register in T stop reply?). Just pick the first
4726 thread in the thread list then. */
4729 fprintf_unfiltered (gdb_stdlog
,
4730 "warning: couldn't determine remote "
4731 "current thread; picking first in list.\n");
4733 for (thread_info
*tp
: all_non_exited_threads (this,
4736 switch_to_thread (tp
);
4741 switch_to_thread (find_thread_ptid (this, curr_thread
));
4744 /* init_wait_for_inferior should be called before get_offsets in order
4745 to manage `inserted' flag in bp loc in a correct state.
4746 breakpoint_init_inferior, called from init_wait_for_inferior, set
4747 `inserted' flag to 0, while before breakpoint_re_set, called from
4748 start_remote, set `inserted' flag to 1. In the initialization of
4749 inferior, breakpoint_init_inferior should be called first, and then
4750 breakpoint_re_set can be called. If this order is broken, state of
4751 `inserted' flag is wrong, and cause some problems on breakpoint
4753 init_wait_for_inferior ();
4755 get_offsets (); /* Get text, data & bss offsets. */
4757 /* If we could not find a description using qXfer, and we know
4758 how to do it some other way, try again. This is not
4759 supported for non-stop; it could be, but it is tricky if
4760 there are no stopped threads when we connect. */
4761 if (remote_read_description_p (this)
4762 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4764 target_clear_description ();
4765 target_find_description ();
4768 /* Use the previously fetched status. */
4769 gdb_assert (wait_status
!= NULL
);
4770 strcpy (rs
->buf
.data (), wait_status
);
4771 rs
->cached_wait_status
= 1;
4773 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4777 /* Clear WFI global state. Do this before finding about new
4778 threads and inferiors, and setting the current inferior.
4779 Otherwise we would clear the proceed status of the current
4780 inferior when we want its stop_soon state to be preserved
4781 (see notice_new_inferior). */
4782 init_wait_for_inferior ();
4784 /* In non-stop, we will either get an "OK", meaning that there
4785 are no stopped threads at this time; or, a regular stop
4786 reply. In the latter case, there may be more than one thread
4787 stopped --- we pull them all out using the vStopped
4789 if (strcmp (rs
->buf
.data (), "OK") != 0)
4791 struct notif_client
*notif
= ¬if_client_stop
;
4793 /* remote_notif_get_pending_replies acks this one, and gets
4795 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4796 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4797 remote_notif_get_pending_events (notif
);
4800 if (thread_count (this) == 0)
4803 error (_("The target is not running (try extended-remote?)"));
4805 /* We're connected, but not running. Drop out before we
4806 call start_remote. */
4807 rs
->starting_up
= 0;
4811 /* In non-stop mode, any cached wait status will be stored in
4812 the stop reply queue. */
4813 gdb_assert (wait_status
== NULL
);
4815 /* Report all signals during attach/startup. */
4818 /* If there are already stopped threads, mark them stopped and
4819 report their stops before giving the prompt to the user. */
4820 process_initial_stop_replies (from_tty
);
4822 if (target_can_async_p ())
4826 /* If we connected to a live target, do some additional setup. */
4827 if (target_has_execution
)
4829 if (symfile_objfile
) /* No use without a symbol-file. */
4830 remote_check_symbols ();
4833 /* Possibly the target has been engaged in a trace run started
4834 previously; find out where things are at. */
4835 if (get_trace_status (current_trace_status ()) != -1)
4837 struct uploaded_tp
*uploaded_tps
= NULL
;
4839 if (current_trace_status ()->running
)
4840 printf_filtered (_("Trace is already running on the target.\n"));
4842 upload_tracepoints (&uploaded_tps
);
4844 merge_uploaded_tracepoints (&uploaded_tps
);
4847 /* Possibly the target has been engaged in a btrace record started
4848 previously; find out where things are at. */
4849 remote_btrace_maybe_reopen ();
4851 /* The thread and inferior lists are now synchronized with the
4852 target, our symbols have been relocated, and we're merged the
4853 target's tracepoints with ours. We're done with basic start
4855 rs
->starting_up
= 0;
4857 /* Maybe breakpoints are global and need to be inserted now. */
4858 if (breakpoints_should_be_inserted_now ())
4859 insert_breakpoints ();
4863 remote_target::connection_string ()
4865 remote_state
*rs
= get_remote_state ();
4867 if (rs
->remote_desc
->name
!= NULL
)
4868 return rs
->remote_desc
->name
;
4873 /* Open a connection to a remote debugger.
4874 NAME is the filename used for communication. */
4877 remote_target::open (const char *name
, int from_tty
)
4879 open_1 (name
, from_tty
, 0);
4882 /* Open a connection to a remote debugger using the extended
4883 remote gdb protocol. NAME is the filename used for communication. */
4886 extended_remote_target::open (const char *name
, int from_tty
)
4888 open_1 (name
, from_tty
, 1 /*extended_p */);
4891 /* Reset all packets back to "unknown support". Called when opening a
4892 new connection to a remote target. */
4895 reset_all_packet_configs_support (void)
4899 for (i
= 0; i
< PACKET_MAX
; i
++)
4900 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4903 /* Initialize all packet configs. */
4906 init_all_packet_configs (void)
4910 for (i
= 0; i
< PACKET_MAX
; i
++)
4912 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4913 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4917 /* Symbol look-up. */
4920 remote_target::remote_check_symbols ()
4925 /* The remote side has no concept of inferiors that aren't running
4926 yet, it only knows about running processes. If we're connected
4927 but our current inferior is not running, we should not invite the
4928 remote target to request symbol lookups related to its
4929 (unrelated) current process. */
4930 if (!target_has_execution
)
4933 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4936 /* Make sure the remote is pointing at the right process. Note
4937 there's no way to select "no process". */
4938 set_general_process ();
4940 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4941 because we need both at the same time. */
4942 gdb::char_vector
msg (get_remote_packet_size ());
4943 gdb::char_vector
reply (get_remote_packet_size ());
4945 /* Invite target to request symbol lookups. */
4947 putpkt ("qSymbol::");
4949 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4951 while (startswith (reply
.data (), "qSymbol:"))
4953 struct bound_minimal_symbol sym
;
4956 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
4959 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
4960 if (sym
.minsym
== NULL
)
4961 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
4965 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4966 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4968 /* If this is a function address, return the start of code
4969 instead of any data function descriptor. */
4970 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4972 current_top_target ());
4974 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
4975 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4978 putpkt (msg
.data ());
4983 static struct serial
*
4984 remote_serial_open (const char *name
)
4986 static int udp_warning
= 0;
4988 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4989 of in ser-tcp.c, because it is the remote protocol assuming that the
4990 serial connection is reliable and not the serial connection promising
4992 if (!udp_warning
&& startswith (name
, "udp:"))
4994 warning (_("The remote protocol may be unreliable over UDP.\n"
4995 "Some events may be lost, rendering further debugging "
5000 return serial_open (name
);
5003 /* Inform the target of our permission settings. The permission flags
5004 work without this, but if the target knows the settings, it can do
5005 a couple things. First, it can add its own check, to catch cases
5006 that somehow manage to get by the permissions checks in target
5007 methods. Second, if the target is wired to disallow particular
5008 settings (for instance, a system in the field that is not set up to
5009 be able to stop at a breakpoint), it can object to any unavailable
5013 remote_target::set_permissions ()
5015 struct remote_state
*rs
= get_remote_state ();
5017 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
5018 "WriteReg:%x;WriteMem:%x;"
5019 "InsertBreak:%x;InsertTrace:%x;"
5020 "InsertFastTrace:%x;Stop:%x",
5021 may_write_registers
, may_write_memory
,
5022 may_insert_breakpoints
, may_insert_tracepoints
,
5023 may_insert_fast_tracepoints
, may_stop
);
5025 getpkt (&rs
->buf
, 0);
5027 /* If the target didn't like the packet, warn the user. Do not try
5028 to undo the user's settings, that would just be maddening. */
5029 if (strcmp (rs
->buf
.data (), "OK") != 0)
5030 warning (_("Remote refused setting permissions with: %s"),
5034 /* This type describes each known response to the qSupported
5036 struct protocol_feature
5038 /* The name of this protocol feature. */
5041 /* The default for this protocol feature. */
5042 enum packet_support default_support
;
5044 /* The function to call when this feature is reported, or after
5045 qSupported processing if the feature is not supported.
5046 The first argument points to this structure. The second
5047 argument indicates whether the packet requested support be
5048 enabled, disabled, or probed (or the default, if this function
5049 is being called at the end of processing and this feature was
5050 not reported). The third argument may be NULL; if not NULL, it
5051 is a NUL-terminated string taken from the packet following
5052 this feature's name and an equals sign. */
5053 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5054 enum packet_support
, const char *);
5056 /* The corresponding packet for this feature. Only used if
5057 FUNC is remote_supported_packet. */
5062 remote_supported_packet (remote_target
*remote
,
5063 const struct protocol_feature
*feature
,
5064 enum packet_support support
,
5065 const char *argument
)
5069 warning (_("Remote qSupported response supplied an unexpected value for"
5070 " \"%s\"."), feature
->name
);
5074 remote_protocol_packets
[feature
->packet
].support
= support
;
5078 remote_target::remote_packet_size (const protocol_feature
*feature
,
5079 enum packet_support support
, const char *value
)
5081 struct remote_state
*rs
= get_remote_state ();
5086 if (support
!= PACKET_ENABLE
)
5089 if (value
== NULL
|| *value
== '\0')
5091 warning (_("Remote target reported \"%s\" without a size."),
5097 packet_size
= strtol (value
, &value_end
, 16);
5098 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5100 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5101 feature
->name
, value
);
5105 /* Record the new maximum packet size. */
5106 rs
->explicit_packet_size
= packet_size
;
5110 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5111 enum packet_support support
, const char *value
)
5113 remote
->remote_packet_size (feature
, support
, value
);
5116 static const struct protocol_feature remote_protocol_features
[] = {
5117 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5118 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5119 PACKET_qXfer_auxv
},
5120 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5121 PACKET_qXfer_exec_file
},
5122 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5123 PACKET_qXfer_features
},
5124 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5125 PACKET_qXfer_libraries
},
5126 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5127 PACKET_qXfer_libraries_svr4
},
5128 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5129 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5130 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5131 PACKET_qXfer_memory_map
},
5132 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5133 PACKET_qXfer_osdata
},
5134 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5135 PACKET_qXfer_threads
},
5136 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5137 PACKET_qXfer_traceframe_info
},
5138 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5139 PACKET_QPassSignals
},
5140 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5141 PACKET_QCatchSyscalls
},
5142 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5143 PACKET_QProgramSignals
},
5144 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5145 PACKET_QSetWorkingDir
},
5146 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5147 PACKET_QStartupWithShell
},
5148 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5149 PACKET_QEnvironmentHexEncoded
},
5150 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5151 PACKET_QEnvironmentReset
},
5152 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5153 PACKET_QEnvironmentUnset
},
5154 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5155 PACKET_QStartNoAckMode
},
5156 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5157 PACKET_multiprocess_feature
},
5158 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5159 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5160 PACKET_qXfer_siginfo_read
},
5161 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5162 PACKET_qXfer_siginfo_write
},
5163 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5164 PACKET_ConditionalTracepoints
},
5165 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5166 PACKET_ConditionalBreakpoints
},
5167 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5168 PACKET_BreakpointCommands
},
5169 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5170 PACKET_FastTracepoints
},
5171 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5172 PACKET_StaticTracepoints
},
5173 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5174 PACKET_InstallInTrace
},
5175 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5176 PACKET_DisconnectedTracing_feature
},
5177 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5179 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5181 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5182 PACKET_TracepointSource
},
5183 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5185 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5186 PACKET_EnableDisableTracepoints_feature
},
5187 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5188 PACKET_qXfer_fdpic
},
5189 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5191 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5192 PACKET_QDisableRandomization
},
5193 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5194 { "QTBuffer:size", PACKET_DISABLE
,
5195 remote_supported_packet
, PACKET_QTBuffer_size
},
5196 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5197 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5198 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5199 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5200 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5201 PACKET_qXfer_btrace
},
5202 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5203 PACKET_qXfer_btrace_conf
},
5204 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5205 PACKET_Qbtrace_conf_bts_size
},
5206 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5207 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5208 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5209 PACKET_fork_event_feature
},
5210 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5211 PACKET_vfork_event_feature
},
5212 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5213 PACKET_exec_event_feature
},
5214 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5215 PACKET_Qbtrace_conf_pt_size
},
5216 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5217 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5218 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5221 static char *remote_support_xml
;
5223 /* Register string appended to "xmlRegisters=" in qSupported query. */
5226 register_remote_support_xml (const char *xml
)
5228 #if defined(HAVE_LIBEXPAT)
5229 if (remote_support_xml
== NULL
)
5230 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5233 char *copy
= xstrdup (remote_support_xml
+ 13);
5235 char *p
= strtok_r (copy
, ",", &saveptr
);
5239 if (strcmp (p
, xml
) == 0)
5246 while ((p
= strtok_r (NULL
, ",", &saveptr
)) != NULL
);
5249 remote_support_xml
= reconcat (remote_support_xml
,
5250 remote_support_xml
, ",", xml
,
5257 remote_query_supported_append (std::string
*msg
, const char *append
)
5261 msg
->append (append
);
5265 remote_target::remote_query_supported ()
5267 struct remote_state
*rs
= get_remote_state ();
5270 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5272 /* The packet support flags are handled differently for this packet
5273 than for most others. We treat an error, a disabled packet, and
5274 an empty response identically: any features which must be reported
5275 to be used will be automatically disabled. An empty buffer
5276 accomplishes this, since that is also the representation for a list
5277 containing no features. */
5280 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5284 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5285 remote_query_supported_append (&q
, "multiprocess+");
5287 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5288 remote_query_supported_append (&q
, "swbreak+");
5289 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5290 remote_query_supported_append (&q
, "hwbreak+");
5292 remote_query_supported_append (&q
, "qRelocInsn+");
5294 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5295 != AUTO_BOOLEAN_FALSE
)
5296 remote_query_supported_append (&q
, "fork-events+");
5297 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5298 != AUTO_BOOLEAN_FALSE
)
5299 remote_query_supported_append (&q
, "vfork-events+");
5300 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5301 != AUTO_BOOLEAN_FALSE
)
5302 remote_query_supported_append (&q
, "exec-events+");
5304 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5305 remote_query_supported_append (&q
, "vContSupported+");
5307 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5308 remote_query_supported_append (&q
, "QThreadEvents+");
5310 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5311 remote_query_supported_append (&q
, "no-resumed+");
5313 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5314 the qSupported:xmlRegisters=i386 handling. */
5315 if (remote_support_xml
!= NULL
5316 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5317 remote_query_supported_append (&q
, remote_support_xml
);
5319 q
= "qSupported:" + q
;
5320 putpkt (q
.c_str ());
5322 getpkt (&rs
->buf
, 0);
5324 /* If an error occured, warn, but do not return - just reset the
5325 buffer to empty and go on to disable features. */
5326 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5329 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5334 memset (seen
, 0, sizeof (seen
));
5336 next
= rs
->buf
.data ();
5339 enum packet_support is_supported
;
5340 char *p
, *end
, *name_end
, *value
;
5342 /* First separate out this item from the rest of the packet. If
5343 there's another item after this, we overwrite the separator
5344 (terminated strings are much easier to work with). */
5346 end
= strchr (p
, ';');
5349 end
= p
+ strlen (p
);
5359 warning (_("empty item in \"qSupported\" response"));
5364 name_end
= strchr (p
, '=');
5367 /* This is a name=value entry. */
5368 is_supported
= PACKET_ENABLE
;
5369 value
= name_end
+ 1;
5378 is_supported
= PACKET_ENABLE
;
5382 is_supported
= PACKET_DISABLE
;
5386 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5390 warning (_("unrecognized item \"%s\" "
5391 "in \"qSupported\" response"), p
);
5397 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5398 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5400 const struct protocol_feature
*feature
;
5403 feature
= &remote_protocol_features
[i
];
5404 feature
->func (this, feature
, is_supported
, value
);
5409 /* If we increased the packet size, make sure to increase the global
5410 buffer size also. We delay this until after parsing the entire
5411 qSupported packet, because this is the same buffer we were
5413 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5414 rs
->buf
.resize (rs
->explicit_packet_size
);
5416 /* Handle the defaults for unmentioned features. */
5417 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5420 const struct protocol_feature
*feature
;
5422 feature
= &remote_protocol_features
[i
];
5423 feature
->func (this, feature
, feature
->default_support
, NULL
);
5427 /* Serial QUIT handler for the remote serial descriptor.
5429 Defers handling a Ctrl-C until we're done with the current
5430 command/response packet sequence, unless:
5432 - We're setting up the connection. Don't send a remote interrupt
5433 request, as we're not fully synced yet. Quit immediately
5436 - The target has been resumed in the foreground
5437 (target_terminal::is_ours is false) with a synchronous resume
5438 packet, and we're blocked waiting for the stop reply, thus a
5439 Ctrl-C should be immediately sent to the target.
5441 - We get a second Ctrl-C while still within the same serial read or
5442 write. In that case the serial is seemingly wedged --- offer to
5445 - We see a second Ctrl-C without target response, after having
5446 previously interrupted the target. In that case the target/stub
5447 is probably wedged --- offer to quit/disconnect.
5451 remote_target::remote_serial_quit_handler ()
5453 struct remote_state
*rs
= get_remote_state ();
5455 if (check_quit_flag ())
5457 /* If we're starting up, we're not fully synced yet. Quit
5459 if (rs
->starting_up
)
5461 else if (rs
->got_ctrlc_during_io
)
5463 if (query (_("The target is not responding to GDB commands.\n"
5464 "Stop debugging it? ")))
5465 remote_unpush_and_throw (this);
5467 /* If ^C has already been sent once, offer to disconnect. */
5468 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5470 /* All-stop protocol, and blocked waiting for stop reply. Send
5471 an interrupt request. */
5472 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5473 target_interrupt ();
5475 rs
->got_ctrlc_during_io
= 1;
5479 /* The remote_target that is current while the quit handler is
5480 overridden with remote_serial_quit_handler. */
5481 static remote_target
*curr_quit_handler_target
;
5484 remote_serial_quit_handler ()
5486 curr_quit_handler_target
->remote_serial_quit_handler ();
5489 /* Remove the remote target from the target stack of each inferior
5490 that is using it. Upper targets depend on it so remove them
5494 remote_unpush_target (remote_target
*target
)
5496 /* We have to unpush the target from all inferiors, even those that
5498 scoped_restore_current_inferior restore_current_inferior
;
5500 for (inferior
*inf
: all_inferiors (target
))
5502 switch_to_inferior_no_thread (inf
);
5503 pop_all_targets_at_and_above (process_stratum
);
5504 generic_mourn_inferior ();
5509 remote_unpush_and_throw (remote_target
*target
)
5511 remote_unpush_target (target
);
5512 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5516 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5518 remote_target
*curr_remote
= get_current_remote_target ();
5521 error (_("To open a remote debug connection, you need to specify what\n"
5522 "serial device is attached to the remote system\n"
5523 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5525 /* If we're connected to a running target, target_preopen will kill it.
5526 Ask this question first, before target_preopen has a chance to kill
5528 if (curr_remote
!= NULL
&& !target_has_execution
)
5531 && !query (_("Already connected to a remote target. Disconnect? ")))
5532 error (_("Still connected."));
5535 /* Here the possibly existing remote target gets unpushed. */
5536 target_preopen (from_tty
);
5538 remote_fileio_reset ();
5539 reopen_exec_file ();
5542 remote_target
*remote
5543 = (extended_p
? new extended_remote_target () : new remote_target ());
5544 target_ops_up
target_holder (remote
);
5546 remote_state
*rs
= remote
->get_remote_state ();
5548 /* See FIXME above. */
5549 if (!target_async_permitted
)
5550 rs
->wait_forever_enabled_p
= 1;
5552 rs
->remote_desc
= remote_serial_open (name
);
5553 if (!rs
->remote_desc
)
5554 perror_with_name (name
);
5556 if (baud_rate
!= -1)
5558 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5560 /* The requested speed could not be set. Error out to
5561 top level after closing remote_desc. Take care to
5562 set remote_desc to NULL to avoid closing remote_desc
5564 serial_close (rs
->remote_desc
);
5565 rs
->remote_desc
= NULL
;
5566 perror_with_name (name
);
5570 serial_setparity (rs
->remote_desc
, serial_parity
);
5571 serial_raw (rs
->remote_desc
);
5573 /* If there is something sitting in the buffer we might take it as a
5574 response to a command, which would be bad. */
5575 serial_flush_input (rs
->remote_desc
);
5579 puts_filtered ("Remote debugging using ");
5580 puts_filtered (name
);
5581 puts_filtered ("\n");
5584 /* Switch to using the remote target now. */
5585 push_target (std::move (target_holder
));
5587 /* Register extra event sources in the event loop. */
5588 rs
->remote_async_inferior_event_token
5589 = create_async_event_handler (remote_async_inferior_event_handler
,
5591 rs
->notif_state
= remote_notif_state_allocate (remote
);
5593 /* Reset the target state; these things will be queried either by
5594 remote_query_supported or as they are needed. */
5595 reset_all_packet_configs_support ();
5596 rs
->cached_wait_status
= 0;
5597 rs
->explicit_packet_size
= 0;
5599 rs
->extended
= extended_p
;
5600 rs
->waiting_for_stop_reply
= 0;
5601 rs
->ctrlc_pending_p
= 0;
5602 rs
->got_ctrlc_during_io
= 0;
5604 rs
->general_thread
= not_sent_ptid
;
5605 rs
->continue_thread
= not_sent_ptid
;
5606 rs
->remote_traceframe_number
= -1;
5608 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5610 /* Probe for ability to use "ThreadInfo" query, as required. */
5611 rs
->use_threadinfo_query
= 1;
5612 rs
->use_threadextra_query
= 1;
5614 rs
->readahead_cache
.invalidate ();
5616 if (target_async_permitted
)
5618 /* FIXME: cagney/1999-09-23: During the initial connection it is
5619 assumed that the target is already ready and able to respond to
5620 requests. Unfortunately remote_start_remote() eventually calls
5621 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5622 around this. Eventually a mechanism that allows
5623 wait_for_inferior() to expect/get timeouts will be
5625 rs
->wait_forever_enabled_p
= 0;
5628 /* First delete any symbols previously loaded from shared libraries. */
5629 no_shared_libraries (NULL
, 0);
5631 /* Start the remote connection. If error() or QUIT, discard this
5632 target (we'd otherwise be in an inconsistent state) and then
5633 propogate the error on up the exception chain. This ensures that
5634 the caller doesn't stumble along blindly assuming that the
5635 function succeeded. The CLI doesn't have this problem but other
5636 UI's, such as MI do.
5638 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5639 this function should return an error indication letting the
5640 caller restore the previous state. Unfortunately the command
5641 ``target remote'' is directly wired to this function making that
5642 impossible. On a positive note, the CLI side of this problem has
5643 been fixed - the function set_cmd_context() makes it possible for
5644 all the ``target ....'' commands to share a common callback
5645 function. See cli-dump.c. */
5650 remote
->start_remote (from_tty
, extended_p
);
5652 catch (const gdb_exception
&ex
)
5654 /* Pop the partially set up target - unless something else did
5655 already before throwing the exception. */
5656 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5657 remote_unpush_target (remote
);
5662 remote_btrace_reset (rs
);
5664 if (target_async_permitted
)
5665 rs
->wait_forever_enabled_p
= 1;
5668 /* Detach the specified process. */
5671 remote_target::remote_detach_pid (int pid
)
5673 struct remote_state
*rs
= get_remote_state ();
5675 /* This should not be necessary, but the handling for D;PID in
5676 GDBserver versions prior to 8.2 incorrectly assumes that the
5677 selected process points to the same process we're detaching,
5678 leading to misbehavior (and possibly GDBserver crashing) when it
5679 does not. Since it's easy and cheap, work around it by forcing
5680 GDBserver to select GDB's current process. */
5681 set_general_process ();
5683 if (remote_multi_process_p (rs
))
5684 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5686 strcpy (rs
->buf
.data (), "D");
5689 getpkt (&rs
->buf
, 0);
5691 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5693 else if (rs
->buf
[0] == '\0')
5694 error (_("Remote doesn't know how to detach"));
5696 error (_("Can't detach process."));
5699 /* This detaches a program to which we previously attached, using
5700 inferior_ptid to identify the process. After this is done, GDB
5701 can be used to debug some other program. We better not have left
5702 any breakpoints in the target program or it'll die when it hits
5706 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5708 int pid
= inferior_ptid
.pid ();
5709 struct remote_state
*rs
= get_remote_state ();
5712 if (!target_has_execution
)
5713 error (_("No process to detach from."));
5715 target_announce_detach (from_tty
);
5717 /* Tell the remote target to detach. */
5718 remote_detach_pid (pid
);
5720 /* Exit only if this is the only active inferior. */
5721 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors (this) == 1)
5722 puts_filtered (_("Ending remote debugging.\n"));
5724 thread_info
*tp
= find_thread_ptid (this, inferior_ptid
);
5726 /* Check to see if we are detaching a fork parent. Note that if we
5727 are detaching a fork child, tp == NULL. */
5728 is_fork_parent
= (tp
!= NULL
5729 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5731 /* If doing detach-on-fork, we don't mourn, because that will delete
5732 breakpoints that should be available for the followed inferior. */
5733 if (!is_fork_parent
)
5735 /* Save the pid as a string before mourning, since that will
5736 unpush the remote target, and we need the string after. */
5737 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5739 target_mourn_inferior (inferior_ptid
);
5740 if (print_inferior_events
)
5741 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5742 inf
->num
, infpid
.c_str ());
5746 inferior_ptid
= null_ptid
;
5747 detach_inferior (current_inferior ());
5752 remote_target::detach (inferior
*inf
, int from_tty
)
5754 remote_detach_1 (inf
, from_tty
);
5758 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5760 remote_detach_1 (inf
, from_tty
);
5763 /* Target follow-fork function for remote targets. On entry, and
5764 at return, the current inferior is the fork parent.
5766 Note that although this is currently only used for extended-remote,
5767 it is named remote_follow_fork in anticipation of using it for the
5768 remote target as well. */
5771 remote_target::follow_fork (bool follow_child
, bool detach_fork
)
5773 struct remote_state
*rs
= get_remote_state ();
5774 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5776 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5777 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5779 /* When following the parent and detaching the child, we detach
5780 the child here. For the case of following the child and
5781 detaching the parent, the detach is done in the target-
5782 independent follow fork code in infrun.c. We can't use
5783 target_detach when detaching an unfollowed child because
5784 the client side doesn't know anything about the child. */
5785 if (detach_fork
&& !follow_child
)
5787 /* Detach the fork child. */
5791 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5792 child_pid
= child_ptid
.pid ();
5794 remote_detach_pid (child_pid
);
5801 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5802 in the program space of the new inferior. On entry and at return the
5803 current inferior is the exec'ing inferior. INF is the new exec'd
5804 inferior, which may be the same as the exec'ing inferior unless
5805 follow-exec-mode is "new". */
5808 remote_target::follow_exec (struct inferior
*inf
, const char *execd_pathname
)
5810 /* We know that this is a target file name, so if it has the "target:"
5811 prefix we strip it off before saving it in the program space. */
5812 if (is_target_filename (execd_pathname
))
5813 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5815 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5818 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5821 remote_target::disconnect (const char *args
, int from_tty
)
5824 error (_("Argument given to \"disconnect\" when remotely debugging."));
5826 /* Make sure we unpush even the extended remote targets. Calling
5827 target_mourn_inferior won't unpush, and
5828 remote_target::mourn_inferior won't unpush if there is more than
5829 one inferior left. */
5830 remote_unpush_target (this);
5833 puts_filtered ("Ending remote debugging.\n");
5836 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5837 be chatty about it. */
5840 extended_remote_target::attach (const char *args
, int from_tty
)
5842 struct remote_state
*rs
= get_remote_state ();
5844 char *wait_status
= NULL
;
5846 pid
= parse_pid_to_attach (args
);
5848 /* Remote PID can be freely equal to getpid, do not check it here the same
5849 way as in other targets. */
5851 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5852 error (_("This target does not support attaching to a process"));
5856 const char *exec_file
= get_exec_file (0);
5859 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5860 target_pid_to_str (ptid_t (pid
)).c_str ());
5862 printf_unfiltered (_("Attaching to %s\n"),
5863 target_pid_to_str (ptid_t (pid
)).c_str ());
5866 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
5868 getpkt (&rs
->buf
, 0);
5870 switch (packet_ok (rs
->buf
,
5871 &remote_protocol_packets
[PACKET_vAttach
]))
5874 if (!target_is_non_stop_p ())
5876 /* Save the reply for later. */
5877 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
5878 strcpy (wait_status
, rs
->buf
.data ());
5880 else if (strcmp (rs
->buf
.data (), "OK") != 0)
5881 error (_("Attaching to %s failed with: %s"),
5882 target_pid_to_str (ptid_t (pid
)).c_str (),
5885 case PACKET_UNKNOWN
:
5886 error (_("This target does not support attaching to a process"));
5888 error (_("Attaching to %s failed"),
5889 target_pid_to_str (ptid_t (pid
)).c_str ());
5892 set_current_inferior (remote_add_inferior (false, pid
, 1, 0));
5894 inferior_ptid
= ptid_t (pid
);
5896 if (target_is_non_stop_p ())
5898 struct thread_info
*thread
;
5900 /* Get list of threads. */
5901 update_thread_list ();
5903 thread
= first_thread_of_inferior (current_inferior ());
5905 inferior_ptid
= thread
->ptid
;
5907 inferior_ptid
= ptid_t (pid
);
5909 /* Invalidate our notion of the remote current thread. */
5910 record_currthread (rs
, minus_one_ptid
);
5914 /* Now, if we have thread information, update inferior_ptid. */
5915 inferior_ptid
= remote_current_thread (inferior_ptid
);
5917 /* Add the main thread to the thread list. */
5918 thread_info
*thr
= add_thread_silent (this, inferior_ptid
);
5919 /* Don't consider the thread stopped until we've processed the
5920 saved stop reply. */
5921 set_executing (this, thr
->ptid
, true);
5924 /* Next, if the target can specify a description, read it. We do
5925 this before anything involving memory or registers. */
5926 target_find_description ();
5928 if (!target_is_non_stop_p ())
5930 /* Use the previously fetched status. */
5931 gdb_assert (wait_status
!= NULL
);
5933 if (target_can_async_p ())
5935 struct notif_event
*reply
5936 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
5938 push_stop_reply ((struct stop_reply
*) reply
);
5944 gdb_assert (wait_status
!= NULL
);
5945 strcpy (rs
->buf
.data (), wait_status
);
5946 rs
->cached_wait_status
= 1;
5950 gdb_assert (wait_status
== NULL
);
5953 /* Implementation of the to_post_attach method. */
5956 extended_remote_target::post_attach (int pid
)
5958 /* Get text, data & bss offsets. */
5961 /* In certain cases GDB might not have had the chance to start
5962 symbol lookup up until now. This could happen if the debugged
5963 binary is not using shared libraries, the vsyscall page is not
5964 present (on Linux) and the binary itself hadn't changed since the
5965 debugging process was started. */
5966 if (symfile_objfile
!= NULL
)
5967 remote_check_symbols();
5971 /* Check for the availability of vCont. This function should also check
5975 remote_target::remote_vcont_probe ()
5977 remote_state
*rs
= get_remote_state ();
5980 strcpy (rs
->buf
.data (), "vCont?");
5982 getpkt (&rs
->buf
, 0);
5983 buf
= rs
->buf
.data ();
5985 /* Make sure that the features we assume are supported. */
5986 if (startswith (buf
, "vCont"))
5989 int support_c
, support_C
;
5991 rs
->supports_vCont
.s
= 0;
5992 rs
->supports_vCont
.S
= 0;
5995 rs
->supports_vCont
.t
= 0;
5996 rs
->supports_vCont
.r
= 0;
5997 while (p
&& *p
== ';')
6000 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6001 rs
->supports_vCont
.s
= 1;
6002 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6003 rs
->supports_vCont
.S
= 1;
6004 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6006 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6008 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6009 rs
->supports_vCont
.t
= 1;
6010 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6011 rs
->supports_vCont
.r
= 1;
6013 p
= strchr (p
, ';');
6016 /* If c, and C are not all supported, we can't use vCont. Clearing
6017 BUF will make packet_ok disable the packet. */
6018 if (!support_c
|| !support_C
)
6022 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
6023 rs
->supports_vCont_probed
= true;
6026 /* Helper function for building "vCont" resumptions. Write a
6027 resumption to P. ENDP points to one-passed-the-end of the buffer
6028 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6029 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6030 resumed thread should be single-stepped and/or signalled. If PTID
6031 equals minus_one_ptid, then all threads are resumed; if PTID
6032 represents a process, then all threads of the process are resumed;
6033 the thread to be stepped and/or signalled is given in the global
6037 remote_target::append_resumption (char *p
, char *endp
,
6038 ptid_t ptid
, int step
, gdb_signal siggnal
)
6040 struct remote_state
*rs
= get_remote_state ();
6042 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6043 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6045 /* GDB is willing to range step. */
6046 && use_range_stepping
6047 /* Target supports range stepping. */
6048 && rs
->supports_vCont
.r
6049 /* We don't currently support range stepping multiple
6050 threads with a wildcard (though the protocol allows it,
6051 so stubs shouldn't make an active effort to forbid
6053 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6055 struct thread_info
*tp
;
6057 if (ptid
== minus_one_ptid
)
6059 /* If we don't know about the target thread's tid, then
6060 we're resuming magic_null_ptid (see caller). */
6061 tp
= find_thread_ptid (this, magic_null_ptid
);
6064 tp
= find_thread_ptid (this, ptid
);
6065 gdb_assert (tp
!= NULL
);
6067 if (tp
->control
.may_range_step
)
6069 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6071 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6072 phex_nz (tp
->control
.step_range_start
,
6074 phex_nz (tp
->control
.step_range_end
,
6078 p
+= xsnprintf (p
, endp
- p
, ";s");
6081 p
+= xsnprintf (p
, endp
- p
, ";s");
6082 else if (siggnal
!= GDB_SIGNAL_0
)
6083 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6085 p
+= xsnprintf (p
, endp
- p
, ";c");
6087 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6091 /* All (-1) threads of process. */
6092 nptid
= ptid_t (ptid
.pid (), -1, 0);
6094 p
+= xsnprintf (p
, endp
- p
, ":");
6095 p
= write_ptid (p
, endp
, nptid
);
6097 else if (ptid
!= minus_one_ptid
)
6099 p
+= xsnprintf (p
, endp
- p
, ":");
6100 p
= write_ptid (p
, endp
, ptid
);
6106 /* Clear the thread's private info on resume. */
6109 resume_clear_thread_private_info (struct thread_info
*thread
)
6111 if (thread
->priv
!= NULL
)
6113 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6115 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6116 priv
->watch_data_address
= 0;
6120 /* Append a vCont continue-with-signal action for threads that have a
6121 non-zero stop signal. */
6124 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6127 for (thread_info
*thread
: all_non_exited_threads (this, ptid
))
6128 if (inferior_ptid
!= thread
->ptid
6129 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
6131 p
= append_resumption (p
, endp
, thread
->ptid
,
6132 0, thread
->suspend
.stop_signal
);
6133 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
6134 resume_clear_thread_private_info (thread
);
6140 /* Set the target running, using the packets that use Hc
6144 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6147 struct remote_state
*rs
= get_remote_state ();
6150 rs
->last_sent_signal
= siggnal
;
6151 rs
->last_sent_step
= step
;
6153 /* The c/s/C/S resume packets use Hc, so set the continue
6155 if (ptid
== minus_one_ptid
)
6156 set_continue_thread (any_thread_ptid
);
6158 set_continue_thread (ptid
);
6160 for (thread_info
*thread
: all_non_exited_threads (this))
6161 resume_clear_thread_private_info (thread
);
6163 buf
= rs
->buf
.data ();
6164 if (::execution_direction
== EXEC_REVERSE
)
6166 /* We don't pass signals to the target in reverse exec mode. */
6167 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6168 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6171 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6172 error (_("Remote reverse-step not supported."));
6173 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6174 error (_("Remote reverse-continue not supported."));
6176 strcpy (buf
, step
? "bs" : "bc");
6178 else if (siggnal
!= GDB_SIGNAL_0
)
6180 buf
[0] = step
? 'S' : 'C';
6181 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6182 buf
[2] = tohex (((int) siggnal
) & 0xf);
6186 strcpy (buf
, step
? "s" : "c");
6191 /* Resume the remote inferior by using a "vCont" packet. The thread
6192 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6193 resumed thread should be single-stepped and/or signalled. If PTID
6194 equals minus_one_ptid, then all threads are resumed; the thread to
6195 be stepped and/or signalled is given in the global INFERIOR_PTID.
6196 This function returns non-zero iff it resumes the inferior.
6198 This function issues a strict subset of all possible vCont commands
6202 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6203 enum gdb_signal siggnal
)
6205 struct remote_state
*rs
= get_remote_state ();
6209 /* No reverse execution actions defined for vCont. */
6210 if (::execution_direction
== EXEC_REVERSE
)
6213 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6214 remote_vcont_probe ();
6216 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6219 p
= rs
->buf
.data ();
6220 endp
= p
+ get_remote_packet_size ();
6222 /* If we could generate a wider range of packets, we'd have to worry
6223 about overflowing BUF. Should there be a generic
6224 "multi-part-packet" packet? */
6226 p
+= xsnprintf (p
, endp
- p
, "vCont");
6228 if (ptid
== magic_null_ptid
)
6230 /* MAGIC_NULL_PTID means that we don't have any active threads,
6231 so we don't have any TID numbers the inferior will
6232 understand. Make sure to only send forms that do not specify
6234 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6236 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6238 /* Resume all threads (of all processes, or of a single
6239 process), with preference for INFERIOR_PTID. This assumes
6240 inferior_ptid belongs to the set of all threads we are about
6242 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6244 /* Step inferior_ptid, with or without signal. */
6245 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6248 /* Also pass down any pending signaled resumption for other
6249 threads not the current. */
6250 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6252 /* And continue others without a signal. */
6253 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6257 /* Scheduler locking; resume only PTID. */
6258 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6261 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6264 if (target_is_non_stop_p ())
6266 /* In non-stop, the stub replies to vCont with "OK". The stop
6267 reply will be reported asynchronously by means of a `%Stop'
6269 getpkt (&rs
->buf
, 0);
6270 if (strcmp (rs
->buf
.data (), "OK") != 0)
6271 error (_("Unexpected vCont reply in non-stop mode: %s"),
6278 /* Tell the remote machine to resume. */
6281 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6283 struct remote_state
*rs
= get_remote_state ();
6285 /* When connected in non-stop mode, the core resumes threads
6286 individually. Resuming remote threads directly in target_resume
6287 would thus result in sending one packet per thread. Instead, to
6288 minimize roundtrip latency, here we just store the resume
6289 request; the actual remote resumption will be done in
6290 target_commit_resume / remote_commit_resume, where we'll be able
6291 to do vCont action coalescing. */
6292 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6294 remote_thread_info
*remote_thr
;
6296 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6297 remote_thr
= get_remote_thread_info (this, inferior_ptid
);
6299 remote_thr
= get_remote_thread_info (this, ptid
);
6301 remote_thr
->last_resume_step
= step
;
6302 remote_thr
->last_resume_sig
= siggnal
;
6306 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6307 (explained in remote-notif.c:handle_notification) so
6308 remote_notif_process is not called. We need find a place where
6309 it is safe to start a 'vNotif' sequence. It is good to do it
6310 before resuming inferior, because inferior was stopped and no RSP
6311 traffic at that moment. */
6312 if (!target_is_non_stop_p ())
6313 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6315 rs
->last_resume_exec_dir
= ::execution_direction
;
6317 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6318 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6319 remote_resume_with_hc (ptid
, step
, siggnal
);
6321 /* We are about to start executing the inferior, let's register it
6322 with the event loop. NOTE: this is the one place where all the
6323 execution commands end up. We could alternatively do this in each
6324 of the execution commands in infcmd.c. */
6325 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6326 into infcmd.c in order to allow inferior function calls to work
6327 NOT asynchronously. */
6328 if (target_can_async_p ())
6331 /* We've just told the target to resume. The remote server will
6332 wait for the inferior to stop, and then send a stop reply. In
6333 the mean time, we can't start another command/query ourselves
6334 because the stub wouldn't be ready to process it. This applies
6335 only to the base all-stop protocol, however. In non-stop (which
6336 only supports vCont), the stub replies with an "OK", and is
6337 immediate able to process further serial input. */
6338 if (!target_is_non_stop_p ())
6339 rs
->waiting_for_stop_reply
= 1;
6342 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6344 /* Private per-inferior info for target remote processes. */
6346 struct remote_inferior
: public private_inferior
6348 /* Whether we can send a wildcard vCont for this process. */
6349 bool may_wildcard_vcont
= true;
6352 /* Get the remote private inferior data associated to INF. */
6354 static remote_inferior
*
6355 get_remote_inferior (inferior
*inf
)
6357 if (inf
->priv
== NULL
)
6358 inf
->priv
.reset (new remote_inferior
);
6360 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6363 /* Class used to track the construction of a vCont packet in the
6364 outgoing packet buffer. This is used to send multiple vCont
6365 packets if we have more actions than would fit a single packet. */
6370 explicit vcont_builder (remote_target
*remote
)
6377 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6382 /* The remote target. */
6383 remote_target
*m_remote
;
6385 /* Pointer to the first action. P points here if no action has been
6387 char *m_first_action
;
6389 /* Where the next action will be appended. */
6392 /* The end of the buffer. Must never write past this. */
6396 /* Prepare the outgoing buffer for a new vCont packet. */
6399 vcont_builder::restart ()
6401 struct remote_state
*rs
= m_remote
->get_remote_state ();
6403 m_p
= rs
->buf
.data ();
6404 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6405 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6406 m_first_action
= m_p
;
6409 /* If the vCont packet being built has any action, send it to the
6413 vcont_builder::flush ()
6415 struct remote_state
*rs
;
6417 if (m_p
== m_first_action
)
6420 rs
= m_remote
->get_remote_state ();
6421 m_remote
->putpkt (rs
->buf
);
6422 m_remote
->getpkt (&rs
->buf
, 0);
6423 if (strcmp (rs
->buf
.data (), "OK") != 0)
6424 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6427 /* The largest action is range-stepping, with its two addresses. This
6428 is more than sufficient. If a new, bigger action is created, it'll
6429 quickly trigger a failed assertion in append_resumption (and we'll
6431 #define MAX_ACTION_SIZE 200
6433 /* Append a new vCont action in the outgoing packet being built. If
6434 the action doesn't fit the packet along with previous actions, push
6435 what we've got so far to the remote end and start over a new vCont
6436 packet (with the new action). */
6439 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6441 char buf
[MAX_ACTION_SIZE
+ 1];
6443 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6444 ptid
, step
, siggnal
);
6446 /* Check whether this new action would fit in the vCont packet along
6447 with previous actions. If not, send what we've got so far and
6448 start a new vCont packet. */
6449 size_t rsize
= endp
- buf
;
6450 if (rsize
> m_endp
- m_p
)
6455 /* Should now fit. */
6456 gdb_assert (rsize
<= m_endp
- m_p
);
6459 memcpy (m_p
, buf
, rsize
);
6464 /* to_commit_resume implementation. */
6467 remote_target::commit_resume ()
6469 int any_process_wildcard
;
6470 int may_global_wildcard_vcont
;
6472 /* If connected in all-stop mode, we'd send the remote resume
6473 request directly from remote_resume. Likewise if
6474 reverse-debugging, as there are no defined vCont actions for
6475 reverse execution. */
6476 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6479 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6480 instead of resuming all threads of each process individually.
6481 However, if any thread of a process must remain halted, we can't
6482 send wildcard resumes and must send one action per thread.
6484 Care must be taken to not resume threads/processes the server
6485 side already told us are stopped, but the core doesn't know about
6486 yet, because the events are still in the vStopped notification
6489 #1 => vCont s:p1.1;c
6491 #3 <= %Stopped T05 p1.1
6496 #8 (infrun handles the stop for p1.1 and continues stepping)
6497 #9 => vCont s:p1.1;c
6499 The last vCont above would resume thread p1.2 by mistake, because
6500 the server has no idea that the event for p1.2 had not been
6503 The server side must similarly ignore resume actions for the
6504 thread that has a pending %Stopped notification (and any other
6505 threads with events pending), until GDB acks the notification
6506 with vStopped. Otherwise, e.g., the following case is
6509 #1 => g (or any other packet)
6511 #3 <= %Stopped T05 p1.2
6512 #4 => vCont s:p1.1;c
6515 Above, the server must not resume thread p1.2. GDB can't know
6516 that p1.2 stopped until it acks the %Stopped notification, and
6517 since from GDB's perspective all threads should be running, it
6520 Finally, special care must also be given to handling fork/vfork
6521 events. A (v)fork event actually tells us that two processes
6522 stopped -- the parent and the child. Until we follow the fork,
6523 we must not resume the child. Therefore, if we have a pending
6524 fork follow, we must not send a global wildcard resume action
6525 (vCont;c). We can still send process-wide wildcards though. */
6527 /* Start by assuming a global wildcard (vCont;c) is possible. */
6528 may_global_wildcard_vcont
= 1;
6530 /* And assume every process is individually wildcard-able too. */
6531 for (inferior
*inf
: all_non_exited_inferiors (this))
6533 remote_inferior
*priv
= get_remote_inferior (inf
);
6535 priv
->may_wildcard_vcont
= true;
6538 /* Check for any pending events (not reported or processed yet) and
6539 disable process and global wildcard resumes appropriately. */
6540 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6542 for (thread_info
*tp
: all_non_exited_threads (this))
6544 /* If a thread of a process is not meant to be resumed, then we
6545 can't wildcard that process. */
6548 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6550 /* And if we can't wildcard a process, we can't wildcard
6551 everything either. */
6552 may_global_wildcard_vcont
= 0;
6556 /* If a thread is the parent of an unfollowed fork, then we
6557 can't do a global wildcard, as that would resume the fork
6559 if (is_pending_fork_parent_thread (tp
))
6560 may_global_wildcard_vcont
= 0;
6563 /* Now let's build the vCont packet(s). Actions must be appended
6564 from narrower to wider scopes (thread -> process -> global). If
6565 we end up with too many actions for a single packet vcont_builder
6566 flushes the current vCont packet to the remote side and starts a
6568 struct vcont_builder
vcont_builder (this);
6570 /* Threads first. */
6571 for (thread_info
*tp
: all_non_exited_threads (this))
6573 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6575 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
6578 gdb_assert (!thread_is_in_step_over_chain (tp
));
6580 if (!remote_thr
->last_resume_step
6581 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
6582 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6584 /* We'll send a wildcard resume instead. */
6585 remote_thr
->vcont_resumed
= 1;
6589 vcont_builder
.push_action (tp
->ptid
,
6590 remote_thr
->last_resume_step
,
6591 remote_thr
->last_resume_sig
);
6592 remote_thr
->vcont_resumed
= 1;
6595 /* Now check whether we can send any process-wide wildcard. This is
6596 to avoid sending a global wildcard in the case nothing is
6597 supposed to be resumed. */
6598 any_process_wildcard
= 0;
6600 for (inferior
*inf
: all_non_exited_inferiors (this))
6602 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6604 any_process_wildcard
= 1;
6609 if (any_process_wildcard
)
6611 /* If all processes are wildcard-able, then send a single "c"
6612 action, otherwise, send an "all (-1) threads of process"
6613 continue action for each running process, if any. */
6614 if (may_global_wildcard_vcont
)
6616 vcont_builder
.push_action (minus_one_ptid
,
6617 false, GDB_SIGNAL_0
);
6621 for (inferior
*inf
: all_non_exited_inferiors (this))
6623 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6625 vcont_builder
.push_action (ptid_t (inf
->pid
),
6626 false, GDB_SIGNAL_0
);
6632 vcont_builder
.flush ();
6637 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6638 thread, all threads of a remote process, or all threads of all
6642 remote_target::remote_stop_ns (ptid_t ptid
)
6644 struct remote_state
*rs
= get_remote_state ();
6645 char *p
= rs
->buf
.data ();
6646 char *endp
= p
+ get_remote_packet_size ();
6648 /* FIXME: This supports_vCont_probed check is a workaround until
6649 packet_support is per-connection. */
6650 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6651 || !rs
->supports_vCont_probed
)
6652 remote_vcont_probe ();
6654 if (!rs
->supports_vCont
.t
)
6655 error (_("Remote server does not support stopping threads"));
6657 if (ptid
== minus_one_ptid
6658 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6659 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6664 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6667 /* All (-1) threads of process. */
6668 nptid
= ptid_t (ptid
.pid (), -1, 0);
6671 /* Small optimization: if we already have a stop reply for
6672 this thread, no use in telling the stub we want this
6674 if (peek_stop_reply (ptid
))
6680 write_ptid (p
, endp
, nptid
);
6683 /* In non-stop, we get an immediate OK reply. The stop reply will
6684 come in asynchronously by notification. */
6686 getpkt (&rs
->buf
, 0);
6687 if (strcmp (rs
->buf
.data (), "OK") != 0)
6688 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6692 /* All-stop version of target_interrupt. Sends a break or a ^C to
6693 interrupt the remote target. It is undefined which thread of which
6694 process reports the interrupt. */
6697 remote_target::remote_interrupt_as ()
6699 struct remote_state
*rs
= get_remote_state ();
6701 rs
->ctrlc_pending_p
= 1;
6703 /* If the inferior is stopped already, but the core didn't know
6704 about it yet, just ignore the request. The cached wait status
6705 will be collected in remote_wait. */
6706 if (rs
->cached_wait_status
)
6709 /* Send interrupt_sequence to remote target. */
6710 send_interrupt_sequence ();
6713 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6714 the remote target. It is undefined which thread of which process
6715 reports the interrupt. Throws an error if the packet is not
6716 supported by the server. */
6719 remote_target::remote_interrupt_ns ()
6721 struct remote_state
*rs
= get_remote_state ();
6722 char *p
= rs
->buf
.data ();
6723 char *endp
= p
+ get_remote_packet_size ();
6725 xsnprintf (p
, endp
- p
, "vCtrlC");
6727 /* In non-stop, we get an immediate OK reply. The stop reply will
6728 come in asynchronously by notification. */
6730 getpkt (&rs
->buf
, 0);
6732 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6736 case PACKET_UNKNOWN
:
6737 error (_("No support for interrupting the remote target."));
6739 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
6743 /* Implement the to_stop function for the remote targets. */
6746 remote_target::stop (ptid_t ptid
)
6749 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6751 if (target_is_non_stop_p ())
6752 remote_stop_ns (ptid
);
6755 /* We don't currently have a way to transparently pause the
6756 remote target in all-stop mode. Interrupt it instead. */
6757 remote_interrupt_as ();
6761 /* Implement the to_interrupt function for the remote targets. */
6764 remote_target::interrupt ()
6767 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6769 if (target_is_non_stop_p ())
6770 remote_interrupt_ns ();
6772 remote_interrupt_as ();
6775 /* Implement the to_pass_ctrlc function for the remote targets. */
6778 remote_target::pass_ctrlc ()
6780 struct remote_state
*rs
= get_remote_state ();
6783 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6785 /* If we're starting up, we're not fully synced yet. Quit
6787 if (rs
->starting_up
)
6789 /* If ^C has already been sent once, offer to disconnect. */
6790 else if (rs
->ctrlc_pending_p
)
6793 target_interrupt ();
6796 /* Ask the user what to do when an interrupt is received. */
6799 remote_target::interrupt_query ()
6801 struct remote_state
*rs
= get_remote_state ();
6803 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6805 if (query (_("The target is not responding to interrupt requests.\n"
6806 "Stop debugging it? ")))
6808 remote_unpush_target (this);
6809 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6814 if (query (_("Interrupted while waiting for the program.\n"
6815 "Give up waiting? ")))
6820 /* Enable/disable target terminal ownership. Most targets can use
6821 terminal groups to control terminal ownership. Remote targets are
6822 different in that explicit transfer of ownership to/from GDB/target
6826 remote_target::terminal_inferior ()
6828 /* NOTE: At this point we could also register our selves as the
6829 recipient of all input. Any characters typed could then be
6830 passed on down to the target. */
6834 remote_target::terminal_ours ()
6839 remote_console_output (const char *msg
)
6843 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6846 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6850 gdb_stdtarg
->puts (tb
);
6852 gdb_stdtarg
->flush ();
6855 struct stop_reply
: public notif_event
6859 /* The identifier of the thread about this event */
6862 /* The remote state this event is associated with. When the remote
6863 connection, represented by a remote_state object, is closed,
6864 all the associated stop_reply events should be released. */
6865 struct remote_state
*rs
;
6867 struct target_waitstatus ws
;
6869 /* The architecture associated with the expedited registers. */
6872 /* Expedited registers. This makes remote debugging a bit more
6873 efficient for those targets that provide critical registers as
6874 part of their normal status mechanism (as another roundtrip to
6875 fetch them is avoided). */
6876 std::vector
<cached_reg_t
> regcache
;
6878 enum target_stop_reason stop_reason
;
6880 CORE_ADDR watch_data_address
;
6885 /* Return the length of the stop reply queue. */
6888 remote_target::stop_reply_queue_length ()
6890 remote_state
*rs
= get_remote_state ();
6891 return rs
->stop_reply_queue
.size ();
6895 remote_notif_stop_parse (remote_target
*remote
,
6896 struct notif_client
*self
, const char *buf
,
6897 struct notif_event
*event
)
6899 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6903 remote_notif_stop_ack (remote_target
*remote
,
6904 struct notif_client
*self
, const char *buf
,
6905 struct notif_event
*event
)
6907 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6910 putpkt (remote
, self
->ack_command
);
6912 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6914 /* We got an unknown stop reply. */
6915 error (_("Unknown stop reply"));
6918 remote
->push_stop_reply (stop_reply
);
6922 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
6923 struct notif_client
*self
)
6925 /* We can't get pending events in remote_notif_process for
6926 notification stop, and we have to do this in remote_wait_ns
6927 instead. If we fetch all queued events from stub, remote stub
6928 may exit and we have no chance to process them back in
6930 remote_state
*rs
= remote
->get_remote_state ();
6931 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
6935 stop_reply::~stop_reply ()
6937 for (cached_reg_t
®
: regcache
)
6941 static notif_event_up
6942 remote_notif_stop_alloc_reply ()
6944 return notif_event_up (new struct stop_reply ());
6947 /* A client of notification Stop. */
6949 struct notif_client notif_client_stop
=
6953 remote_notif_stop_parse
,
6954 remote_notif_stop_ack
,
6955 remote_notif_stop_can_get_pending_events
,
6956 remote_notif_stop_alloc_reply
,
6960 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6961 the pid of the process that owns the threads we want to check, or
6962 -1 if we want to check all threads. */
6965 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6968 if (ws
->kind
== TARGET_WAITKIND_FORKED
6969 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6971 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
6978 /* Return the thread's pending status used to determine whether the
6979 thread is a fork parent stopped at a fork event. */
6981 static struct target_waitstatus
*
6982 thread_pending_fork_status (struct thread_info
*thread
)
6984 if (thread
->suspend
.waitstatus_pending_p
)
6985 return &thread
->suspend
.waitstatus
;
6987 return &thread
->pending_follow
;
6990 /* Determine if THREAD is a pending fork parent thread. */
6993 is_pending_fork_parent_thread (struct thread_info
*thread
)
6995 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6998 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7001 /* If CONTEXT contains any fork child threads that have not been
7002 reported yet, remove them from the CONTEXT list. If such a
7003 thread exists it is because we are stopped at a fork catchpoint
7004 and have not yet called follow_fork, which will set up the
7005 host-side data structures for the new process. */
7008 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7011 struct notif_client
*notif
= ¬if_client_stop
;
7013 /* For any threads stopped at a fork event, remove the corresponding
7014 fork child threads from the CONTEXT list. */
7015 for (thread_info
*thread
: all_non_exited_threads (this))
7017 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7019 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7020 context
->remove_thread (ws
->value
.related_pid
);
7023 /* Check for any pending fork events (not reported or processed yet)
7024 in process PID and remove those fork child threads from the
7025 CONTEXT list as well. */
7026 remote_notif_get_pending_events (notif
);
7027 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7028 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7029 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7030 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7031 context
->remove_thread (event
->ws
.value
.related_pid
);
7034 /* Check whether any event pending in the vStopped queue would prevent
7035 a global or process wildcard vCont action. Clear
7036 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7037 and clear the event inferior's may_wildcard_vcont flag if we can't
7038 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7041 remote_target::check_pending_events_prevent_wildcard_vcont
7042 (int *may_global_wildcard
)
7044 struct notif_client
*notif
= ¬if_client_stop
;
7046 remote_notif_get_pending_events (notif
);
7047 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7049 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7050 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7053 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7054 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7055 *may_global_wildcard
= 0;
7057 struct inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7059 /* This may be the first time we heard about this process.
7060 Regardless, we must not do a global wildcard resume, otherwise
7061 we'd resume this process too. */
7062 *may_global_wildcard
= 0;
7064 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7068 /* Discard all pending stop replies of inferior INF. */
7071 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7073 struct stop_reply
*reply
;
7074 struct remote_state
*rs
= get_remote_state ();
7075 struct remote_notif_state
*rns
= rs
->notif_state
;
7077 /* This function can be notified when an inferior exists. When the
7078 target is not remote, the notification state is NULL. */
7079 if (rs
->remote_desc
== NULL
)
7082 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7084 /* Discard the in-flight notification. */
7085 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7088 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
7091 /* Discard the stop replies we have already pulled with
7093 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7094 rs
->stop_reply_queue
.end (),
7095 [=] (const stop_reply_up
&event
)
7097 return event
->ptid
.pid () == inf
->pid
;
7099 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7102 /* Discard the stop replies for RS in stop_reply_queue. */
7105 remote_target::discard_pending_stop_replies_in_queue ()
7107 remote_state
*rs
= get_remote_state ();
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
->rs
== rs
;
7117 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7120 /* Remove the first reply in 'stop_reply_queue' which matches
7124 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7126 remote_state
*rs
= get_remote_state ();
7128 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7129 rs
->stop_reply_queue
.end (),
7130 [=] (const stop_reply_up
&event
)
7132 return event
->ptid
.matches (ptid
);
7134 struct stop_reply
*result
;
7135 if (iter
== rs
->stop_reply_queue
.end ())
7139 result
= iter
->release ();
7140 rs
->stop_reply_queue
.erase (iter
);
7144 fprintf_unfiltered (gdb_stdlog
,
7145 "notif: discard queued event: 'Stop' in %s\n",
7146 target_pid_to_str (ptid
).c_str ());
7151 /* Look for a queued stop reply belonging to PTID. If one is found,
7152 remove it from the queue, and return it. Returns NULL if none is
7153 found. If there are still queued events left to process, tell the
7154 event loop to get back to target_wait soon. */
7157 remote_target::queued_stop_reply (ptid_t ptid
)
7159 remote_state
*rs
= get_remote_state ();
7160 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7162 if (!rs
->stop_reply_queue
.empty ())
7164 /* There's still at least an event left. */
7165 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7171 /* Push a fully parsed stop reply in the stop reply queue. Since we
7172 know that we now have at least one queued event left to pass to the
7173 core side, tell the event loop to get back to target_wait soon. */
7176 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7178 remote_state
*rs
= get_remote_state ();
7179 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7182 fprintf_unfiltered (gdb_stdlog
,
7183 "notif: push 'Stop' %s to queue %d\n",
7184 target_pid_to_str (new_event
->ptid
).c_str (),
7185 int (rs
->stop_reply_queue
.size ()));
7187 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7190 /* Returns true if we have a stop reply for PTID. */
7193 remote_target::peek_stop_reply (ptid_t ptid
)
7195 remote_state
*rs
= get_remote_state ();
7196 for (auto &event
: rs
->stop_reply_queue
)
7197 if (ptid
== event
->ptid
7198 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7203 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7204 starting with P and ending with PEND matches PREFIX. */
7207 strprefix (const char *p
, const char *pend
, const char *prefix
)
7209 for ( ; p
< pend
; p
++, prefix
++)
7212 return *prefix
== '\0';
7215 /* Parse the stop reply in BUF. Either the function succeeds, and the
7216 result is stored in EVENT, or throws an error. */
7219 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7221 remote_arch_state
*rsa
= NULL
;
7226 event
->ptid
= null_ptid
;
7227 event
->rs
= get_remote_state ();
7228 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7229 event
->ws
.value
.integer
= 0;
7230 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7231 event
->regcache
.clear ();
7236 case 'T': /* Status with PC, SP, FP, ... */
7237 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7238 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7240 n... = register number
7241 r... = register contents
7244 p
= &buf
[3]; /* after Txx */
7250 p1
= strchr (p
, ':');
7252 error (_("Malformed packet(a) (missing colon): %s\n\
7256 error (_("Malformed packet(a) (missing register number): %s\n\
7260 /* Some "registers" are actually extended stop information.
7261 Note if you're adding a new entry here: GDB 7.9 and
7262 earlier assume that all register "numbers" that start
7263 with an hex digit are real register numbers. Make sure
7264 the server only sends such a packet if it knows the
7265 client understands it. */
7267 if (strprefix (p
, p1
, "thread"))
7268 event
->ptid
= read_ptid (++p1
, &p
);
7269 else if (strprefix (p
, p1
, "syscall_entry"))
7273 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7274 p
= unpack_varlen_hex (++p1
, &sysno
);
7275 event
->ws
.value
.syscall_number
= (int) sysno
;
7277 else if (strprefix (p
, p1
, "syscall_return"))
7281 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7282 p
= unpack_varlen_hex (++p1
, &sysno
);
7283 event
->ws
.value
.syscall_number
= (int) sysno
;
7285 else if (strprefix (p
, p1
, "watch")
7286 || strprefix (p
, p1
, "rwatch")
7287 || strprefix (p
, p1
, "awatch"))
7289 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7290 p
= unpack_varlen_hex (++p1
, &addr
);
7291 event
->watch_data_address
= (CORE_ADDR
) addr
;
7293 else if (strprefix (p
, p1
, "swbreak"))
7295 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7297 /* Make sure the stub doesn't forget to indicate support
7299 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7300 error (_("Unexpected swbreak stop reason"));
7302 /* The value part is documented as "must be empty",
7303 though we ignore it, in case we ever decide to make
7304 use of it in a backward compatible way. */
7305 p
= strchrnul (p1
+ 1, ';');
7307 else if (strprefix (p
, p1
, "hwbreak"))
7309 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7311 /* Make sure the stub doesn't forget to indicate support
7313 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7314 error (_("Unexpected hwbreak stop reason"));
7317 p
= strchrnul (p1
+ 1, ';');
7319 else if (strprefix (p
, p1
, "library"))
7321 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7322 p
= strchrnul (p1
+ 1, ';');
7324 else if (strprefix (p
, p1
, "replaylog"))
7326 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7327 /* p1 will indicate "begin" or "end", but it makes
7328 no difference for now, so ignore it. */
7329 p
= strchrnul (p1
+ 1, ';');
7331 else if (strprefix (p
, p1
, "core"))
7335 p
= unpack_varlen_hex (++p1
, &c
);
7338 else if (strprefix (p
, p1
, "fork"))
7340 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7341 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7343 else if (strprefix (p
, p1
, "vfork"))
7345 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7346 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7348 else if (strprefix (p
, p1
, "vforkdone"))
7350 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7351 p
= strchrnul (p1
+ 1, ';');
7353 else if (strprefix (p
, p1
, "exec"))
7358 /* Determine the length of the execd pathname. */
7359 p
= unpack_varlen_hex (++p1
, &ignored
);
7360 pathlen
= (p
- p1
) / 2;
7362 /* Save the pathname for event reporting and for
7363 the next run command. */
7364 gdb::unique_xmalloc_ptr
<char[]> pathname
7365 ((char *) xmalloc (pathlen
+ 1));
7366 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7367 pathname
[pathlen
] = '\0';
7369 /* This is freed during event handling. */
7370 event
->ws
.value
.execd_pathname
= pathname
.release ();
7371 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7373 /* Skip the registers included in this packet, since
7374 they may be for an architecture different from the
7375 one used by the original program. */
7378 else if (strprefix (p
, p1
, "create"))
7380 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7381 p
= strchrnul (p1
+ 1, ';');
7390 p
= strchrnul (p1
+ 1, ';');
7395 /* Maybe a real ``P'' register number. */
7396 p_temp
= unpack_varlen_hex (p
, &pnum
);
7397 /* If the first invalid character is the colon, we got a
7398 register number. Otherwise, it's an unknown stop
7402 /* If we haven't parsed the event's thread yet, find
7403 it now, in order to find the architecture of the
7404 reported expedited registers. */
7405 if (event
->ptid
== null_ptid
)
7407 /* If there is no thread-id information then leave
7408 the event->ptid as null_ptid. Later in
7409 process_stop_reply we will pick a suitable
7411 const char *thr
= strstr (p1
+ 1, ";thread:");
7413 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7420 = (event
->ptid
== null_ptid
7422 : find_inferior_ptid (this, event
->ptid
));
7423 /* If this is the first time we learn anything
7424 about this process, skip the registers
7425 included in this packet, since we don't yet
7426 know which architecture to use to parse them.
7427 We'll determine the architecture later when
7428 we process the stop reply and retrieve the
7429 target description, via
7430 remote_notice_new_inferior ->
7431 post_create_inferior. */
7434 p
= strchrnul (p1
+ 1, ';');
7439 event
->arch
= inf
->gdbarch
;
7440 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7444 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7445 cached_reg_t cached_reg
;
7448 error (_("Remote sent bad register number %s: %s\n\
7450 hex_string (pnum
), p
, buf
);
7452 cached_reg
.num
= reg
->regnum
;
7453 cached_reg
.data
= (gdb_byte
*)
7454 xmalloc (register_size (event
->arch
, reg
->regnum
));
7457 fieldsize
= hex2bin (p
, cached_reg
.data
,
7458 register_size (event
->arch
, reg
->regnum
));
7460 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7461 warning (_("Remote reply is too short: %s"), buf
);
7463 event
->regcache
.push_back (cached_reg
);
7467 /* Not a number. Silently skip unknown optional
7469 p
= strchrnul (p1
+ 1, ';');
7474 error (_("Remote register badly formatted: %s\nhere: %s"),
7479 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7483 case 'S': /* Old style status, just signal only. */
7487 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7488 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7489 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7490 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7492 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7495 case 'w': /* Thread exited. */
7499 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7500 p
= unpack_varlen_hex (&buf
[1], &value
);
7501 event
->ws
.value
.integer
= value
;
7503 error (_("stop reply packet badly formatted: %s"), buf
);
7504 event
->ptid
= read_ptid (++p
, NULL
);
7507 case 'W': /* Target exited. */
7512 /* GDB used to accept only 2 hex chars here. Stubs should
7513 only send more if they detect GDB supports multi-process
7515 p
= unpack_varlen_hex (&buf
[1], &value
);
7519 /* The remote process exited. */
7520 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7521 event
->ws
.value
.integer
= value
;
7525 /* The remote process exited with a signal. */
7526 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7527 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7528 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7530 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7533 /* If no process is specified, return null_ptid, and let the
7534 caller figure out the right process to use. */
7544 else if (startswith (p
, "process:"))
7548 p
+= sizeof ("process:") - 1;
7549 unpack_varlen_hex (p
, &upid
);
7553 error (_("unknown stop reply packet: %s"), buf
);
7556 error (_("unknown stop reply packet: %s"), buf
);
7557 event
->ptid
= ptid_t (pid
);
7561 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7562 event
->ptid
= minus_one_ptid
;
7567 /* When the stub wants to tell GDB about a new notification reply, it
7568 sends a notification (%Stop, for example). Those can come it at
7569 any time, hence, we have to make sure that any pending
7570 putpkt/getpkt sequence we're making is finished, before querying
7571 the stub for more events with the corresponding ack command
7572 (vStopped, for example). E.g., if we started a vStopped sequence
7573 immediately upon receiving the notification, something like this
7581 1.6) <-- (registers reply to step #1.3)
7583 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7586 To solve this, whenever we parse a %Stop notification successfully,
7587 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7588 doing whatever we were doing:
7594 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7595 2.5) <-- (registers reply to step #2.3)
7597 Eventually after step #2.5, we return to the event loop, which
7598 notices there's an event on the
7599 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7600 associated callback --- the function below. At this point, we're
7601 always safe to start a vStopped sequence. :
7604 2.7) <-- T05 thread:2
7610 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7612 struct remote_state
*rs
= get_remote_state ();
7614 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7617 fprintf_unfiltered (gdb_stdlog
,
7618 "notif: process: '%s' ack pending event\n",
7622 nc
->ack (this, nc
, rs
->buf
.data (),
7623 rs
->notif_state
->pending_event
[nc
->id
]);
7624 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7628 getpkt (&rs
->buf
, 0);
7629 if (strcmp (rs
->buf
.data (), "OK") == 0)
7632 remote_notif_ack (this, nc
, rs
->buf
.data ());
7638 fprintf_unfiltered (gdb_stdlog
,
7639 "notif: process: '%s' no pending reply\n",
7644 /* Wrapper around remote_target::remote_notif_get_pending_events to
7645 avoid having to export the whole remote_target class. */
7648 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7650 remote
->remote_notif_get_pending_events (nc
);
7653 /* Called when it is decided that STOP_REPLY holds the info of the
7654 event that is to be returned to the core. This function always
7655 destroys STOP_REPLY. */
7658 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
7659 struct target_waitstatus
*status
)
7663 *status
= stop_reply
->ws
;
7664 ptid
= stop_reply
->ptid
;
7666 /* If no thread/process was reported by the stub then use the first
7667 non-exited thread in the current target. */
7668 if (ptid
== null_ptid
)
7670 /* Some stop events apply to all threads in an inferior, while others
7671 only apply to a single thread. */
7672 bool is_stop_for_all_threads
7673 = (status
->kind
== TARGET_WAITKIND_EXITED
7674 || status
->kind
== TARGET_WAITKIND_SIGNALLED
);
7676 for (thread_info
*thr
: all_non_exited_threads (this))
7678 if (ptid
!= null_ptid
7679 && (!is_stop_for_all_threads
7680 || ptid
.pid () != thr
->ptid
.pid ()))
7682 static bool warned
= false;
7686 /* If you are seeing this warning then the remote target
7687 has stopped without specifying a thread-id, but the
7688 target does have multiple threads (or inferiors), and
7689 so GDB is having to guess which thread stopped.
7691 Examples of what might cause this are the target
7692 sending and 'S' stop packet, or a 'T' stop packet and
7693 not including a thread-id.
7695 Additionally, the target might send a 'W' or 'X
7696 packet without including a process-id, when the target
7697 has multiple running inferiors. */
7698 if (is_stop_for_all_threads
)
7699 warning (_("multi-inferior target stopped without "
7700 "sending a process-id, using first "
7701 "non-exited inferior"));
7703 warning (_("multi-threaded target stopped without "
7704 "sending a thread-id, using first "
7705 "non-exited thread"));
7711 /* If this is a stop for all threads then don't use a particular
7712 threads ptid, instead create a new ptid where only the pid
7714 if (is_stop_for_all_threads
)
7715 ptid
= ptid_t (thr
->ptid
.pid ());
7719 gdb_assert (ptid
!= null_ptid
);
7722 if (status
->kind
!= TARGET_WAITKIND_EXITED
7723 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7724 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7726 /* Expedited registers. */
7727 if (!stop_reply
->regcache
.empty ())
7729 struct regcache
*regcache
7730 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
7732 for (cached_reg_t
®
: stop_reply
->regcache
)
7734 regcache
->raw_supply (reg
.num
, reg
.data
);
7738 stop_reply
->regcache
.clear ();
7741 remote_notice_new_inferior (ptid
, 0);
7742 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
7743 remote_thr
->core
= stop_reply
->core
;
7744 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7745 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7746 remote_thr
->vcont_resumed
= 0;
7753 /* The non-stop mode version of target_wait. */
7756 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7758 struct remote_state
*rs
= get_remote_state ();
7759 struct stop_reply
*stop_reply
;
7763 /* If in non-stop mode, get out of getpkt even if a
7764 notification is received. */
7766 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
7769 if (ret
!= -1 && !is_notif
)
7772 case 'E': /* Error of some sort. */
7773 /* We're out of sync with the target now. Did it continue
7774 or not? We can't tell which thread it was in non-stop,
7775 so just ignore this. */
7776 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
7778 case 'O': /* Console output. */
7779 remote_console_output (&rs
->buf
[1]);
7782 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
7786 /* Acknowledge a pending stop reply that may have arrived in the
7788 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7789 remote_notif_get_pending_events (¬if_client_stop
);
7791 /* If indeed we noticed a stop reply, we're done. */
7792 stop_reply
= queued_stop_reply (ptid
);
7793 if (stop_reply
!= NULL
)
7794 return process_stop_reply (stop_reply
, status
);
7796 /* Still no event. If we're just polling for an event, then
7797 return to the event loop. */
7798 if (options
& TARGET_WNOHANG
)
7800 status
->kind
= TARGET_WAITKIND_IGNORE
;
7801 return minus_one_ptid
;
7804 /* Otherwise do a blocking wait. */
7805 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
7809 /* Return the first resumed thread. */
7812 first_remote_resumed_thread (remote_target
*target
)
7814 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
7820 /* Wait until the remote machine stops, then return, storing status in
7821 STATUS just as `wait' would. */
7824 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
, int options
)
7826 struct remote_state
*rs
= get_remote_state ();
7827 ptid_t event_ptid
= null_ptid
;
7829 struct stop_reply
*stop_reply
;
7833 status
->kind
= TARGET_WAITKIND_IGNORE
;
7834 status
->value
.integer
= 0;
7836 stop_reply
= queued_stop_reply (ptid
);
7837 if (stop_reply
!= NULL
)
7838 return process_stop_reply (stop_reply
, status
);
7840 if (rs
->cached_wait_status
)
7841 /* Use the cached wait status, but only once. */
7842 rs
->cached_wait_status
= 0;
7847 int forever
= ((options
& TARGET_WNOHANG
) == 0
7848 && rs
->wait_forever_enabled_p
);
7850 if (!rs
->waiting_for_stop_reply
)
7852 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7853 return minus_one_ptid
;
7856 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7857 _never_ wait for ever -> test on target_is_async_p().
7858 However, before we do that we need to ensure that the caller
7859 knows how to take the target into/out of async mode. */
7860 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
7862 /* GDB gets a notification. Return to core as this event is
7864 if (ret
!= -1 && is_notif
)
7865 return minus_one_ptid
;
7867 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7868 return minus_one_ptid
;
7871 buf
= rs
->buf
.data ();
7873 /* Assume that the target has acknowledged Ctrl-C unless we receive
7874 an 'F' or 'O' packet. */
7875 if (buf
[0] != 'F' && buf
[0] != 'O')
7876 rs
->ctrlc_pending_p
= 0;
7880 case 'E': /* Error of some sort. */
7881 /* We're out of sync with the target now. Did it continue or
7882 not? Not is more likely, so report a stop. */
7883 rs
->waiting_for_stop_reply
= 0;
7885 warning (_("Remote failure reply: %s"), buf
);
7886 status
->kind
= TARGET_WAITKIND_STOPPED
;
7887 status
->value
.sig
= GDB_SIGNAL_0
;
7889 case 'F': /* File-I/O request. */
7890 /* GDB may access the inferior memory while handling the File-I/O
7891 request, but we don't want GDB accessing memory while waiting
7892 for a stop reply. See the comments in putpkt_binary. Set
7893 waiting_for_stop_reply to 0 temporarily. */
7894 rs
->waiting_for_stop_reply
= 0;
7895 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
7896 rs
->ctrlc_pending_p
= 0;
7897 /* GDB handled the File-I/O request, and the target is running
7898 again. Keep waiting for events. */
7899 rs
->waiting_for_stop_reply
= 1;
7901 case 'N': case 'T': case 'S': case 'X': case 'W':
7903 /* There is a stop reply to handle. */
7904 rs
->waiting_for_stop_reply
= 0;
7907 = (struct stop_reply
*) remote_notif_parse (this,
7911 event_ptid
= process_stop_reply (stop_reply
, status
);
7914 case 'O': /* Console output. */
7915 remote_console_output (buf
+ 1);
7918 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7920 /* Zero length reply means that we tried 'S' or 'C' and the
7921 remote system doesn't support it. */
7922 target_terminal::ours_for_output ();
7924 ("Can't send signals to this remote system. %s not sent.\n",
7925 gdb_signal_to_name (rs
->last_sent_signal
));
7926 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7927 target_terminal::inferior ();
7929 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7935 warning (_("Invalid remote reply: %s"), buf
);
7939 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7940 return minus_one_ptid
;
7941 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7943 /* Nothing interesting happened. If we're doing a non-blocking
7944 poll, we're done. Otherwise, go back to waiting. */
7945 if (options
& TARGET_WNOHANG
)
7946 return minus_one_ptid
;
7950 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7951 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7953 if (event_ptid
!= null_ptid
)
7954 record_currthread (rs
, event_ptid
);
7956 event_ptid
= first_remote_resumed_thread (this);
7960 /* A process exit. Invalidate our notion of current thread. */
7961 record_currthread (rs
, minus_one_ptid
);
7962 /* It's possible that the packet did not include a pid. */
7963 if (event_ptid
== null_ptid
)
7964 event_ptid
= first_remote_resumed_thread (this);
7965 /* EVENT_PTID could still be NULL_PTID. Double-check. */
7966 if (event_ptid
== null_ptid
)
7967 event_ptid
= magic_null_ptid
;
7973 /* Wait until the remote machine stops, then return, storing status in
7974 STATUS just as `wait' would. */
7977 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7981 if (target_is_non_stop_p ())
7982 event_ptid
= wait_ns (ptid
, status
, options
);
7984 event_ptid
= wait_as (ptid
, status
, options
);
7986 if (target_is_async_p ())
7988 remote_state
*rs
= get_remote_state ();
7990 /* If there are are events left in the queue tell the event loop
7992 if (!rs
->stop_reply_queue
.empty ())
7993 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7999 /* Fetch a single register using a 'p' packet. */
8002 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8005 struct gdbarch
*gdbarch
= regcache
->arch ();
8006 struct remote_state
*rs
= get_remote_state ();
8008 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8011 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8014 if (reg
->pnum
== -1)
8017 p
= rs
->buf
.data ();
8019 p
+= hexnumstr (p
, reg
->pnum
);
8022 getpkt (&rs
->buf
, 0);
8024 buf
= rs
->buf
.data ();
8026 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8030 case PACKET_UNKNOWN
:
8033 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8034 gdbarch_register_name (regcache
->arch (),
8039 /* If this register is unfetchable, tell the regcache. */
8042 regcache
->raw_supply (reg
->regnum
, NULL
);
8046 /* Otherwise, parse and supply the value. */
8052 error (_("fetch_register_using_p: early buf termination"));
8054 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8057 regcache
->raw_supply (reg
->regnum
, regp
);
8061 /* Fetch the registers included in the target's 'g' packet. */
8064 remote_target::send_g_packet ()
8066 struct remote_state
*rs
= get_remote_state ();
8069 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8071 getpkt (&rs
->buf
, 0);
8072 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8073 error (_("Could not read registers; remote failure reply '%s'"),
8076 /* We can get out of synch in various cases. If the first character
8077 in the buffer is not a hex character, assume that has happened
8078 and try to fetch another packet to read. */
8079 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8080 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8081 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8082 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8085 fprintf_unfiltered (gdb_stdlog
,
8086 "Bad register packet; fetching a new packet\n");
8087 getpkt (&rs
->buf
, 0);
8090 buf_len
= strlen (rs
->buf
.data ());
8092 /* Sanity check the received packet. */
8093 if (buf_len
% 2 != 0)
8094 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8100 remote_target::process_g_packet (struct regcache
*regcache
)
8102 struct gdbarch
*gdbarch
= regcache
->arch ();
8103 struct remote_state
*rs
= get_remote_state ();
8104 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8109 buf_len
= strlen (rs
->buf
.data ());
8111 /* Further sanity checks, with knowledge of the architecture. */
8112 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8113 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8115 rsa
->sizeof_g_packet
, buf_len
/ 2,
8118 /* Save the size of the packet sent to us by the target. It is used
8119 as a heuristic when determining the max size of packets that the
8120 target can safely receive. */
8121 if (rsa
->actual_register_packet_size
== 0)
8122 rsa
->actual_register_packet_size
= buf_len
;
8124 /* If this is smaller than we guessed the 'g' packet would be,
8125 update our records. A 'g' reply that doesn't include a register's
8126 value implies either that the register is not available, or that
8127 the 'p' packet must be used. */
8128 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8130 long sizeof_g_packet
= buf_len
/ 2;
8132 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8134 long offset
= rsa
->regs
[i
].offset
;
8135 long reg_size
= register_size (gdbarch
, i
);
8137 if (rsa
->regs
[i
].pnum
== -1)
8140 if (offset
>= sizeof_g_packet
)
8141 rsa
->regs
[i
].in_g_packet
= 0;
8142 else if (offset
+ reg_size
> sizeof_g_packet
)
8143 error (_("Truncated register %d in remote 'g' packet"), i
);
8145 rsa
->regs
[i
].in_g_packet
= 1;
8148 /* Looks valid enough, we can assume this is the correct length
8149 for a 'g' packet. It's important not to adjust
8150 rsa->sizeof_g_packet if we have truncated registers otherwise
8151 this "if" won't be run the next time the method is called
8152 with a packet of the same size and one of the internal errors
8153 below will trigger instead. */
8154 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8157 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8159 /* Unimplemented registers read as all bits zero. */
8160 memset (regs
, 0, rsa
->sizeof_g_packet
);
8162 /* Reply describes registers byte by byte, each byte encoded as two
8163 hex characters. Suck them all up, then supply them to the
8164 register cacheing/storage mechanism. */
8166 p
= rs
->buf
.data ();
8167 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8169 if (p
[0] == 0 || p
[1] == 0)
8170 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8171 internal_error (__FILE__
, __LINE__
,
8172 _("unexpected end of 'g' packet reply"));
8174 if (p
[0] == 'x' && p
[1] == 'x')
8175 regs
[i
] = 0; /* 'x' */
8177 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8181 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8183 struct packet_reg
*r
= &rsa
->regs
[i
];
8184 long reg_size
= register_size (gdbarch
, i
);
8188 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8189 /* This shouldn't happen - we adjusted in_g_packet above. */
8190 internal_error (__FILE__
, __LINE__
,
8191 _("unexpected end of 'g' packet reply"));
8192 else if (rs
->buf
[r
->offset
* 2] == 'x')
8194 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8195 /* The register isn't available, mark it as such (at
8196 the same time setting the value to zero). */
8197 regcache
->raw_supply (r
->regnum
, NULL
);
8200 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8206 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8209 process_g_packet (regcache
);
8212 /* Make the remote selected traceframe match GDB's selected
8216 remote_target::set_remote_traceframe ()
8219 struct remote_state
*rs
= get_remote_state ();
8221 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8224 /* Avoid recursion, remote_trace_find calls us again. */
8225 rs
->remote_traceframe_number
= get_traceframe_number ();
8227 newnum
= target_trace_find (tfind_number
,
8228 get_traceframe_number (), 0, 0, NULL
);
8230 /* Should not happen. If it does, all bets are off. */
8231 if (newnum
!= get_traceframe_number ())
8232 warning (_("could not set remote traceframe"));
8236 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8238 struct gdbarch
*gdbarch
= regcache
->arch ();
8239 struct remote_state
*rs
= get_remote_state ();
8240 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8243 set_remote_traceframe ();
8244 set_general_thread (regcache
->ptid ());
8248 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8250 gdb_assert (reg
!= NULL
);
8252 /* If this register might be in the 'g' packet, try that first -
8253 we are likely to read more than one register. If this is the
8254 first 'g' packet, we might be overly optimistic about its
8255 contents, so fall back to 'p'. */
8256 if (reg
->in_g_packet
)
8258 fetch_registers_using_g (regcache
);
8259 if (reg
->in_g_packet
)
8263 if (fetch_register_using_p (regcache
, reg
))
8266 /* This register is not available. */
8267 regcache
->raw_supply (reg
->regnum
, NULL
);
8272 fetch_registers_using_g (regcache
);
8274 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8275 if (!rsa
->regs
[i
].in_g_packet
)
8276 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8278 /* This register is not available. */
8279 regcache
->raw_supply (i
, NULL
);
8283 /* Prepare to store registers. Since we may send them all (using a
8284 'G' request), we have to read out the ones we don't want to change
8288 remote_target::prepare_to_store (struct regcache
*regcache
)
8290 struct remote_state
*rs
= get_remote_state ();
8291 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8294 /* Make sure the entire registers array is valid. */
8295 switch (packet_support (PACKET_P
))
8297 case PACKET_DISABLE
:
8298 case PACKET_SUPPORT_UNKNOWN
:
8299 /* Make sure all the necessary registers are cached. */
8300 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8301 if (rsa
->regs
[i
].in_g_packet
)
8302 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8309 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8310 packet was not recognized. */
8313 remote_target::store_register_using_P (const struct regcache
*regcache
,
8316 struct gdbarch
*gdbarch
= regcache
->arch ();
8317 struct remote_state
*rs
= get_remote_state ();
8318 /* Try storing a single register. */
8319 char *buf
= rs
->buf
.data ();
8320 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8323 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8326 if (reg
->pnum
== -1)
8329 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8330 p
= buf
+ strlen (buf
);
8331 regcache
->raw_collect (reg
->regnum
, regp
);
8332 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8334 getpkt (&rs
->buf
, 0);
8336 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8341 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8342 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8343 case PACKET_UNKNOWN
:
8346 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8350 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8351 contents of the register cache buffer. FIXME: ignores errors. */
8354 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8356 struct remote_state
*rs
= get_remote_state ();
8357 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8361 /* Extract all the registers in the regcache copying them into a
8366 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8367 memset (regs
, 0, rsa
->sizeof_g_packet
);
8368 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8370 struct packet_reg
*r
= &rsa
->regs
[i
];
8373 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8377 /* Command describes registers byte by byte,
8378 each byte encoded as two hex characters. */
8379 p
= rs
->buf
.data ();
8381 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8383 getpkt (&rs
->buf
, 0);
8384 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8385 error (_("Could not write registers; remote failure reply '%s'"),
8389 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8390 of the register cache buffer. FIXME: ignores errors. */
8393 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8395 struct gdbarch
*gdbarch
= regcache
->arch ();
8396 struct remote_state
*rs
= get_remote_state ();
8397 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8400 set_remote_traceframe ();
8401 set_general_thread (regcache
->ptid ());
8405 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8407 gdb_assert (reg
!= NULL
);
8409 /* Always prefer to store registers using the 'P' packet if
8410 possible; we often change only a small number of registers.
8411 Sometimes we change a larger number; we'd need help from a
8412 higher layer to know to use 'G'. */
8413 if (store_register_using_P (regcache
, reg
))
8416 /* For now, don't complain if we have no way to write the
8417 register. GDB loses track of unavailable registers too
8418 easily. Some day, this may be an error. We don't have
8419 any way to read the register, either... */
8420 if (!reg
->in_g_packet
)
8423 store_registers_using_G (regcache
);
8427 store_registers_using_G (regcache
);
8429 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8430 if (!rsa
->regs
[i
].in_g_packet
)
8431 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8432 /* See above for why we do not issue an error here. */
8437 /* Return the number of hex digits in num. */
8440 hexnumlen (ULONGEST num
)
8444 for (i
= 0; num
!= 0; i
++)
8447 return std::max (i
, 1);
8450 /* Set BUF to the minimum number of hex digits representing NUM. */
8453 hexnumstr (char *buf
, ULONGEST num
)
8455 int len
= hexnumlen (num
);
8457 return hexnumnstr (buf
, num
, len
);
8461 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8464 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8470 for (i
= width
- 1; i
>= 0; i
--)
8472 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8479 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8482 remote_address_masked (CORE_ADDR addr
)
8484 unsigned int address_size
= remote_address_size
;
8486 /* If "remoteaddresssize" was not set, default to target address size. */
8488 address_size
= gdbarch_addr_bit (target_gdbarch ());
8490 if (address_size
> 0
8491 && address_size
< (sizeof (ULONGEST
) * 8))
8493 /* Only create a mask when that mask can safely be constructed
8494 in a ULONGEST variable. */
8497 mask
= (mask
<< address_size
) - 1;
8503 /* Determine whether the remote target supports binary downloading.
8504 This is accomplished by sending a no-op memory write of zero length
8505 to the target at the specified address. It does not suffice to send
8506 the whole packet, since many stubs strip the eighth bit and
8507 subsequently compute a wrong checksum, which causes real havoc with
8510 NOTE: This can still lose if the serial line is not eight-bit
8511 clean. In cases like this, the user should clear "remote
8515 remote_target::check_binary_download (CORE_ADDR addr
)
8517 struct remote_state
*rs
= get_remote_state ();
8519 switch (packet_support (PACKET_X
))
8521 case PACKET_DISABLE
:
8525 case PACKET_SUPPORT_UNKNOWN
:
8529 p
= rs
->buf
.data ();
8531 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8533 p
+= hexnumstr (p
, (ULONGEST
) 0);
8537 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8538 getpkt (&rs
->buf
, 0);
8540 if (rs
->buf
[0] == '\0')
8543 fprintf_unfiltered (gdb_stdlog
,
8544 "binary downloading NOT "
8545 "supported by target\n");
8546 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8551 fprintf_unfiltered (gdb_stdlog
,
8552 "binary downloading supported by target\n");
8553 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8560 /* Helper function to resize the payload in order to try to get a good
8561 alignment. We try to write an amount of data such that the next write will
8562 start on an address aligned on REMOTE_ALIGN_WRITES. */
8565 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8567 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8570 /* Write memory data directly to the remote machine.
8571 This does not inform the data cache; the data cache uses this.
8572 HEADER is the starting part of the packet.
8573 MEMADDR is the address in the remote memory space.
8574 MYADDR is the address of the buffer in our space.
8575 LEN_UNITS is the number of addressable units to write.
8576 UNIT_SIZE is the length in bytes of an addressable unit.
8577 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8578 should send data as binary ('X'), or hex-encoded ('M').
8580 The function creates packet of the form
8581 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8583 where encoding of <DATA> is terminated by PACKET_FORMAT.
8585 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8588 Return the transferred status, error or OK (an
8589 'enum target_xfer_status' value). Save the number of addressable units
8590 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8592 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8593 exchange between gdb and the stub could look like (?? in place of the
8599 -> $M1000,3:eeeeffffeeee#??
8603 <- eeeeffffeeeedddd */
8606 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8607 const gdb_byte
*myaddr
,
8610 ULONGEST
*xfered_len_units
,
8611 char packet_format
, int use_length
)
8613 struct remote_state
*rs
= get_remote_state ();
8619 int payload_capacity_bytes
;
8620 int payload_length_bytes
;
8622 if (packet_format
!= 'X' && packet_format
!= 'M')
8623 internal_error (__FILE__
, __LINE__
,
8624 _("remote_write_bytes_aux: bad packet format"));
8627 return TARGET_XFER_EOF
;
8629 payload_capacity_bytes
= get_memory_write_packet_size ();
8631 /* The packet buffer will be large enough for the payload;
8632 get_memory_packet_size ensures this. */
8635 /* Compute the size of the actual payload by subtracting out the
8636 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8638 payload_capacity_bytes
-= strlen ("$,:#NN");
8640 /* The comma won't be used. */
8641 payload_capacity_bytes
+= 1;
8642 payload_capacity_bytes
-= strlen (header
);
8643 payload_capacity_bytes
-= hexnumlen (memaddr
);
8645 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8647 strcat (rs
->buf
.data (), header
);
8648 p
= rs
->buf
.data () + strlen (header
);
8650 /* Compute a best guess of the number of bytes actually transfered. */
8651 if (packet_format
== 'X')
8653 /* Best guess at number of bytes that will fit. */
8654 todo_units
= std::min (len_units
,
8655 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8657 payload_capacity_bytes
-= hexnumlen (todo_units
);
8658 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8662 /* Number of bytes that will fit. */
8664 = std::min (len_units
,
8665 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8667 payload_capacity_bytes
-= hexnumlen (todo_units
);
8668 todo_units
= std::min (todo_units
,
8669 (payload_capacity_bytes
/ unit_size
) / 2);
8672 if (todo_units
<= 0)
8673 internal_error (__FILE__
, __LINE__
,
8674 _("minimum packet size too small to write data"));
8676 /* If we already need another packet, then try to align the end
8677 of this packet to a useful boundary. */
8678 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8679 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8681 /* Append "<memaddr>". */
8682 memaddr
= remote_address_masked (memaddr
);
8683 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8690 /* Append the length and retain its location and size. It may need to be
8691 adjusted once the packet body has been created. */
8693 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8701 /* Append the packet body. */
8702 if (packet_format
== 'X')
8704 /* Binary mode. Send target system values byte by byte, in
8705 increasing byte addresses. Only escape certain critical
8707 payload_length_bytes
=
8708 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8709 &units_written
, payload_capacity_bytes
);
8711 /* If not all TODO units fit, then we'll need another packet. Make
8712 a second try to keep the end of the packet aligned. Don't do
8713 this if the packet is tiny. */
8714 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8718 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8720 if (new_todo_units
!= units_written
)
8721 payload_length_bytes
=
8722 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8723 (gdb_byte
*) p
, &units_written
,
8724 payload_capacity_bytes
);
8727 p
+= payload_length_bytes
;
8728 if (use_length
&& units_written
< todo_units
)
8730 /* Escape chars have filled up the buffer prematurely,
8731 and we have actually sent fewer units than planned.
8732 Fix-up the length field of the packet. Use the same
8733 number of characters as before. */
8734 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8736 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8741 /* Normal mode: Send target system values byte by byte, in
8742 increasing byte addresses. Each byte is encoded as a two hex
8744 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8745 units_written
= todo_units
;
8748 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8749 getpkt (&rs
->buf
, 0);
8751 if (rs
->buf
[0] == 'E')
8752 return TARGET_XFER_E_IO
;
8754 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8755 send fewer units than we'd planned. */
8756 *xfered_len_units
= (ULONGEST
) units_written
;
8757 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8760 /* Write memory data directly to the remote machine.
8761 This does not inform the data cache; the data cache uses this.
8762 MEMADDR is the address in the remote memory space.
8763 MYADDR is the address of the buffer in our space.
8764 LEN is the number of bytes.
8766 Return the transferred status, error or OK (an
8767 'enum target_xfer_status' value). Save the number of bytes
8768 transferred in *XFERED_LEN. Only transfer a single packet. */
8771 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
8772 ULONGEST len
, int unit_size
,
8773 ULONGEST
*xfered_len
)
8775 const char *packet_format
= NULL
;
8777 /* Check whether the target supports binary download. */
8778 check_binary_download (memaddr
);
8780 switch (packet_support (PACKET_X
))
8783 packet_format
= "X";
8785 case PACKET_DISABLE
:
8786 packet_format
= "M";
8788 case PACKET_SUPPORT_UNKNOWN
:
8789 internal_error (__FILE__
, __LINE__
,
8790 _("remote_write_bytes: bad internal state"));
8792 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8795 return remote_write_bytes_aux (packet_format
,
8796 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8797 packet_format
[0], 1);
8800 /* Read memory data directly from the remote machine.
8801 This does not use the data cache; the data cache uses this.
8802 MEMADDR is the address in the remote memory space.
8803 MYADDR is the address of the buffer in our space.
8804 LEN_UNITS is the number of addressable memory units to read..
8805 UNIT_SIZE is the length in bytes of an addressable unit.
8807 Return the transferred status, error or OK (an
8808 'enum target_xfer_status' value). Save the number of bytes
8809 transferred in *XFERED_LEN_UNITS.
8811 See the comment of remote_write_bytes_aux for an example of
8812 memory read/write exchange between gdb and the stub. */
8815 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
8817 int unit_size
, ULONGEST
*xfered_len_units
)
8819 struct remote_state
*rs
= get_remote_state ();
8820 int buf_size_bytes
; /* Max size of packet output buffer. */
8825 buf_size_bytes
= get_memory_read_packet_size ();
8826 /* The packet buffer will be large enough for the payload;
8827 get_memory_packet_size ensures this. */
8829 /* Number of units that will fit. */
8830 todo_units
= std::min (len_units
,
8831 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8833 /* Construct "m"<memaddr>","<len>". */
8834 memaddr
= remote_address_masked (memaddr
);
8835 p
= rs
->buf
.data ();
8837 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8839 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8842 getpkt (&rs
->buf
, 0);
8843 if (rs
->buf
[0] == 'E'
8844 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8845 && rs
->buf
[3] == '\0')
8846 return TARGET_XFER_E_IO
;
8847 /* Reply describes memory byte by byte, each byte encoded as two hex
8849 p
= rs
->buf
.data ();
8850 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8851 /* Return what we have. Let higher layers handle partial reads. */
8852 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8853 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8856 /* Using the set of read-only target sections of remote, read live
8859 For interface/parameters/return description see target.h,
8863 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
8867 ULONGEST
*xfered_len
)
8869 struct target_section
*secp
;
8870 struct target_section_table
*table
;
8872 secp
= target_section_by_addr (this, memaddr
);
8874 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
8876 struct target_section
*p
;
8877 ULONGEST memend
= memaddr
+ len
;
8879 table
= target_get_section_table (this);
8881 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8883 if (memaddr
>= p
->addr
)
8885 if (memend
<= p
->endaddr
)
8887 /* Entire transfer is within this section. */
8888 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8891 else if (memaddr
>= p
->endaddr
)
8893 /* This section ends before the transfer starts. */
8898 /* This section overlaps the transfer. Just do half. */
8899 len
= p
->endaddr
- memaddr
;
8900 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8907 return TARGET_XFER_EOF
;
8910 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8911 first if the requested memory is unavailable in traceframe.
8912 Otherwise, fall back to remote_read_bytes_1. */
8915 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
8916 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8917 ULONGEST
*xfered_len
)
8920 return TARGET_XFER_EOF
;
8922 if (get_traceframe_number () != -1)
8924 std::vector
<mem_range
> available
;
8926 /* If we fail to get the set of available memory, then the
8927 target does not support querying traceframe info, and so we
8928 attempt reading from the traceframe anyway (assuming the
8929 target implements the old QTro packet then). */
8930 if (traceframe_available_memory (&available
, memaddr
, len
))
8932 if (available
.empty () || available
[0].start
!= memaddr
)
8934 enum target_xfer_status res
;
8936 /* Don't read into the traceframe's available
8938 if (!available
.empty ())
8940 LONGEST oldlen
= len
;
8942 len
= available
[0].start
- memaddr
;
8943 gdb_assert (len
<= oldlen
);
8946 /* This goes through the topmost target again. */
8947 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
8948 len
, unit_size
, xfered_len
);
8949 if (res
== TARGET_XFER_OK
)
8950 return TARGET_XFER_OK
;
8953 /* No use trying further, we know some memory starting
8954 at MEMADDR isn't available. */
8956 return (*xfered_len
!= 0) ?
8957 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8961 /* Don't try to read more than how much is available, in
8962 case the target implements the deprecated QTro packet to
8963 cater for older GDBs (the target's knowledge of read-only
8964 sections may be outdated by now). */
8965 len
= available
[0].length
;
8969 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8974 /* Sends a packet with content determined by the printf format string
8975 FORMAT and the remaining arguments, then gets the reply. Returns
8976 whether the packet was a success, a failure, or unknown. */
8979 remote_target::remote_send_printf (const char *format
, ...)
8981 struct remote_state
*rs
= get_remote_state ();
8982 int max_size
= get_remote_packet_size ();
8985 va_start (ap
, format
);
8988 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
8992 if (size
>= max_size
)
8993 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8995 if (putpkt (rs
->buf
) < 0)
8996 error (_("Communication problem with target."));
8999 getpkt (&rs
->buf
, 0);
9001 return packet_check_result (rs
->buf
);
9004 /* Flash writing can take quite some time. We'll set
9005 effectively infinite timeout for flash operations.
9006 In future, we'll need to decide on a better approach. */
9007 static const int remote_flash_timeout
= 1000;
9010 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9012 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9013 enum packet_result ret
;
9014 scoped_restore restore_timeout
9015 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9017 ret
= remote_send_printf ("vFlashErase:%s,%s",
9018 phex (address
, addr_size
),
9022 case PACKET_UNKNOWN
:
9023 error (_("Remote target does not support flash erase"));
9025 error (_("Error erasing flash with vFlashErase packet"));
9032 remote_target::remote_flash_write (ULONGEST address
,
9033 ULONGEST length
, ULONGEST
*xfered_len
,
9034 const gdb_byte
*data
)
9036 scoped_restore restore_timeout
9037 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9038 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9043 remote_target::flash_done ()
9047 scoped_restore restore_timeout
9048 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9050 ret
= remote_send_printf ("vFlashDone");
9054 case PACKET_UNKNOWN
:
9055 error (_("Remote target does not support vFlashDone"));
9057 error (_("Error finishing flash operation"));
9064 remote_target::files_info ()
9066 puts_filtered ("Debugging a target over a serial line.\n");
9069 /* Stuff for dealing with the packets which are part of this protocol.
9070 See comment at top of file for details. */
9072 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9073 error to higher layers. Called when a serial error is detected.
9074 The exception message is STRING, followed by a colon and a blank,
9075 the system error message for errno at function entry and final dot
9076 for output compatibility with throw_perror_with_name. */
9079 unpush_and_perror (remote_target
*target
, const char *string
)
9081 int saved_errno
= errno
;
9083 remote_unpush_target (target
);
9084 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9085 safe_strerror (saved_errno
));
9088 /* Read a single character from the remote end. The current quit
9089 handler is overridden to avoid quitting in the middle of packet
9090 sequence, as that would break communication with the remote server.
9091 See remote_serial_quit_handler for more detail. */
9094 remote_target::readchar (int timeout
)
9097 struct remote_state
*rs
= get_remote_state ();
9100 scoped_restore restore_quit_target
9101 = make_scoped_restore (&curr_quit_handler_target
, this);
9102 scoped_restore restore_quit
9103 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9105 rs
->got_ctrlc_during_io
= 0;
9107 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9109 if (rs
->got_ctrlc_during_io
)
9116 switch ((enum serial_rc
) ch
)
9119 remote_unpush_target (this);
9120 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9123 unpush_and_perror (this, _("Remote communication error. "
9124 "Target disconnected."));
9126 case SERIAL_TIMEOUT
:
9132 /* Wrapper for serial_write that closes the target and throws if
9133 writing fails. The current quit handler is overridden to avoid
9134 quitting in the middle of packet sequence, as that would break
9135 communication with the remote server. See
9136 remote_serial_quit_handler for more detail. */
9139 remote_target::remote_serial_write (const char *str
, int len
)
9141 struct remote_state
*rs
= get_remote_state ();
9143 scoped_restore restore_quit_target
9144 = make_scoped_restore (&curr_quit_handler_target
, this);
9145 scoped_restore restore_quit
9146 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9148 rs
->got_ctrlc_during_io
= 0;
9150 if (serial_write (rs
->remote_desc
, str
, len
))
9152 unpush_and_perror (this, _("Remote communication error. "
9153 "Target disconnected."));
9156 if (rs
->got_ctrlc_during_io
)
9160 /* Return a string representing an escaped version of BUF, of len N.
9161 E.g. \n is converted to \\n, \t to \\t, etc. */
9164 escape_buffer (const char *buf
, int n
)
9168 stb
.putstrn (buf
, n
, '\\');
9169 return std::move (stb
.string ());
9172 /* Display a null-terminated packet on stdout, for debugging, using C
9176 print_packet (const char *buf
)
9178 puts_filtered ("\"");
9179 fputstr_filtered (buf
, '"', gdb_stdout
);
9180 puts_filtered ("\"");
9184 remote_target::putpkt (const char *buf
)
9186 return putpkt_binary (buf
, strlen (buf
));
9189 /* Wrapper around remote_target::putpkt to avoid exporting
9193 putpkt (remote_target
*remote
, const char *buf
)
9195 return remote
->putpkt (buf
);
9198 /* Send a packet to the remote machine, with error checking. The data
9199 of the packet is in BUF. The string in BUF can be at most
9200 get_remote_packet_size () - 5 to account for the $, # and checksum,
9201 and for a possible /0 if we are debugging (remote_debug) and want
9202 to print the sent packet as a string. */
9205 remote_target::putpkt_binary (const char *buf
, int cnt
)
9207 struct remote_state
*rs
= get_remote_state ();
9209 unsigned char csum
= 0;
9210 gdb::def_vector
<char> data (cnt
+ 6);
9211 char *buf2
= data
.data ();
9217 /* Catch cases like trying to read memory or listing threads while
9218 we're waiting for a stop reply. The remote server wouldn't be
9219 ready to handle this request, so we'd hang and timeout. We don't
9220 have to worry about this in synchronous mode, because in that
9221 case it's not possible to issue a command while the target is
9222 running. This is not a problem in non-stop mode, because in that
9223 case, the stub is always ready to process serial input. */
9224 if (!target_is_non_stop_p ()
9225 && target_is_async_p ()
9226 && rs
->waiting_for_stop_reply
)
9228 error (_("Cannot execute this command while the target is running.\n"
9229 "Use the \"interrupt\" command to stop the target\n"
9230 "and then try again."));
9233 /* We're sending out a new packet. Make sure we don't look at a
9234 stale cached response. */
9235 rs
->cached_wait_status
= 0;
9237 /* Copy the packet into buffer BUF2, encapsulating it
9238 and giving it a checksum. */
9243 for (i
= 0; i
< cnt
; i
++)
9249 *p
++ = tohex ((csum
>> 4) & 0xf);
9250 *p
++ = tohex (csum
& 0xf);
9252 /* Send it over and over until we get a positive ack. */
9256 int started_error_output
= 0;
9262 int len
= (int) (p
- buf2
);
9265 if (remote_packet_max_chars
< 0)
9268 max_chars
= remote_packet_max_chars
;
9271 = escape_buffer (buf2
, std::min (len
, max_chars
));
9273 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
9275 if (len
> max_chars
)
9276 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9279 fprintf_unfiltered (gdb_stdlog
, "...");
9281 gdb_flush (gdb_stdlog
);
9283 remote_serial_write (buf2
, p
- buf2
);
9285 /* If this is a no acks version of the remote protocol, send the
9286 packet and move on. */
9290 /* Read until either a timeout occurs (-2) or '+' is read.
9291 Handle any notification that arrives in the mean time. */
9294 ch
= readchar (remote_timeout
);
9302 case SERIAL_TIMEOUT
:
9305 if (started_error_output
)
9307 putchar_unfiltered ('\n');
9308 started_error_output
= 0;
9317 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
9321 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
9323 case SERIAL_TIMEOUT
:
9327 break; /* Retransmit buffer. */
9331 fprintf_unfiltered (gdb_stdlog
,
9332 "Packet instead of Ack, ignoring it\n");
9333 /* It's probably an old response sent because an ACK
9334 was lost. Gobble up the packet and ack it so it
9335 doesn't get retransmitted when we resend this
9338 remote_serial_write ("+", 1);
9339 continue; /* Now, go look for +. */
9346 /* If we got a notification, handle it, and go back to looking
9348 /* We've found the start of a notification. Now
9349 collect the data. */
9350 val
= read_frame (&rs
->buf
);
9355 std::string str
= escape_buffer (rs
->buf
.data (), val
);
9357 fprintf_unfiltered (gdb_stdlog
,
9358 " Notification received: %s\n",
9361 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9362 /* We're in sync now, rewait for the ack. */
9369 if (!started_error_output
)
9371 started_error_output
= 1;
9372 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9374 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9375 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
.data ());
9384 if (!started_error_output
)
9386 started_error_output
= 1;
9387 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9389 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9393 break; /* Here to retransmit. */
9397 /* This is wrong. If doing a long backtrace, the user should be
9398 able to get out next time we call QUIT, without anything as
9399 violent as interrupt_query. If we want to provide a way out of
9400 here without getting to the next QUIT, it should be based on
9401 hitting ^C twice as in remote_wait. */
9413 /* Come here after finding the start of a frame when we expected an
9414 ack. Do our best to discard the rest of this packet. */
9417 remote_target::skip_frame ()
9423 c
= readchar (remote_timeout
);
9426 case SERIAL_TIMEOUT
:
9427 /* Nothing we can do. */
9430 /* Discard the two bytes of checksum and stop. */
9431 c
= readchar (remote_timeout
);
9433 c
= readchar (remote_timeout
);
9436 case '*': /* Run length encoding. */
9437 /* Discard the repeat count. */
9438 c
= readchar (remote_timeout
);
9443 /* A regular character. */
9449 /* Come here after finding the start of the frame. Collect the rest
9450 into *BUF, verifying the checksum, length, and handling run-length
9451 compression. NUL terminate the buffer. If there is not enough room,
9454 Returns -1 on error, number of characters in buffer (ignoring the
9455 trailing NULL) on success. (could be extended to return one of the
9456 SERIAL status indications). */
9459 remote_target::read_frame (gdb::char_vector
*buf_p
)
9464 char *buf
= buf_p
->data ();
9465 struct remote_state
*rs
= get_remote_state ();
9472 c
= readchar (remote_timeout
);
9475 case SERIAL_TIMEOUT
:
9477 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
9481 fputs_filtered ("Saw new packet start in middle of old one\n",
9483 return -1; /* Start a new packet, count retries. */
9486 unsigned char pktcsum
;
9492 check_0
= readchar (remote_timeout
);
9494 check_1
= readchar (remote_timeout
);
9496 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9499 fputs_filtered ("Timeout in checksum, retrying\n",
9503 else if (check_0
< 0 || check_1
< 0)
9506 fputs_filtered ("Communication error in checksum\n",
9511 /* Don't recompute the checksum; with no ack packets we
9512 don't have any way to indicate a packet retransmission
9517 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9518 if (csum
== pktcsum
)
9523 std::string str
= escape_buffer (buf
, bc
);
9525 fprintf_unfiltered (gdb_stdlog
,
9526 "Bad checksum, sentsum=0x%x, "
9527 "csum=0x%x, buf=%s\n",
9528 pktcsum
, csum
, str
.c_str ());
9530 /* Number of characters in buffer ignoring trailing
9534 case '*': /* Run length encoding. */
9539 c
= readchar (remote_timeout
);
9541 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9543 /* The character before ``*'' is repeated. */
9545 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9547 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9549 /* Make some more room in the buffer. */
9550 buf_p
->resize (buf_p
->size () + repeat
);
9551 buf
= buf_p
->data ();
9554 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9560 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9564 if (bc
>= buf_p
->size () - 1)
9566 /* Make some more room in the buffer. */
9567 buf_p
->resize (buf_p
->size () * 2);
9568 buf
= buf_p
->data ();
9578 /* Set this to the maximum number of seconds to wait instead of waiting forever
9579 in target_wait(). If this timer times out, then it generates an error and
9580 the command is aborted. This replaces most of the need for timeouts in the
9581 GDB test suite, and makes it possible to distinguish between a hung target
9582 and one with slow communications. */
9584 static int watchdog
= 0;
9586 show_watchdog (struct ui_file
*file
, int from_tty
,
9587 struct cmd_list_element
*c
, const char *value
)
9589 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
9592 /* Read a packet from the remote machine, with error checking, and
9593 store it in *BUF. Resize *BUF if necessary to hold the result. If
9594 FOREVER, wait forever rather than timing out; this is used (in
9595 synchronous mode) to wait for a target that is is executing user
9597 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9598 don't have to change all the calls to getpkt to deal with the
9599 return value, because at the moment I don't know what the right
9600 thing to do it for those. */
9603 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9605 getpkt_sane (buf
, forever
);
9609 /* Read a packet from the remote machine, with error checking, and
9610 store it in *BUF. Resize *BUF if necessary to hold the result. If
9611 FOREVER, wait forever rather than timing out; this is used (in
9612 synchronous mode) to wait for a target that is is executing user
9613 code to stop. If FOREVER == 0, this function is allowed to time
9614 out gracefully and return an indication of this to the caller.
9615 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9616 consider receiving a notification enough reason to return to the
9617 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9618 holds a notification or not (a regular packet). */
9621 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9622 int forever
, int expecting_notif
,
9625 struct remote_state
*rs
= get_remote_state ();
9631 /* We're reading a new response. Make sure we don't look at a
9632 previously cached response. */
9633 rs
->cached_wait_status
= 0;
9635 strcpy (buf
->data (), "timeout");
9638 timeout
= watchdog
> 0 ? watchdog
: -1;
9639 else if (expecting_notif
)
9640 timeout
= 0; /* There should already be a char in the buffer. If
9643 timeout
= remote_timeout
;
9647 /* Process any number of notifications, and then return when
9651 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9653 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9655 /* This can loop forever if the remote side sends us
9656 characters continuously, but if it pauses, we'll get
9657 SERIAL_TIMEOUT from readchar because of timeout. Then
9658 we'll count that as a retry.
9660 Note that even when forever is set, we will only wait
9661 forever prior to the start of a packet. After that, we
9662 expect characters to arrive at a brisk pace. They should
9663 show up within remote_timeout intervals. */
9665 c
= readchar (timeout
);
9666 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9668 if (c
== SERIAL_TIMEOUT
)
9670 if (expecting_notif
)
9671 return -1; /* Don't complain, it's normal to not get
9672 anything in this case. */
9674 if (forever
) /* Watchdog went off? Kill the target. */
9676 remote_unpush_target (this);
9677 throw_error (TARGET_CLOSE_ERROR
,
9678 _("Watchdog timeout has expired. "
9679 "Target detached."));
9682 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9686 /* We've found the start of a packet or notification.
9687 Now collect the data. */
9688 val
= read_frame (buf
);
9693 remote_serial_write ("-", 1);
9696 if (tries
> MAX_TRIES
)
9698 /* We have tried hard enough, and just can't receive the
9699 packet/notification. Give up. */
9700 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9702 /* Skip the ack char if we're in no-ack mode. */
9703 if (!rs
->noack_mode
)
9704 remote_serial_write ("+", 1);
9708 /* If we got an ordinary packet, return that to our caller. */
9715 if (remote_packet_max_chars
< 0)
9718 max_chars
= remote_packet_max_chars
;
9721 = escape_buffer (buf
->data (),
9722 std::min (val
, max_chars
));
9724 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9727 if (val
> max_chars
)
9728 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9731 fprintf_unfiltered (gdb_stdlog
, "\n");
9734 /* Skip the ack char if we're in no-ack mode. */
9735 if (!rs
->noack_mode
)
9736 remote_serial_write ("+", 1);
9737 if (is_notif
!= NULL
)
9742 /* If we got a notification, handle it, and go back to looking
9746 gdb_assert (c
== '%');
9750 std::string str
= escape_buffer (buf
->data (), val
);
9752 fprintf_unfiltered (gdb_stdlog
,
9753 " Notification received: %s\n",
9756 if (is_notif
!= NULL
)
9759 handle_notification (rs
->notif_state
, buf
->data ());
9761 /* Notifications require no acknowledgement. */
9763 if (expecting_notif
)
9770 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
9772 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
9776 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
9779 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
9782 /* Kill any new fork children of process PID that haven't been
9783 processed by follow_fork. */
9786 remote_target::kill_new_fork_children (int pid
)
9788 remote_state
*rs
= get_remote_state ();
9789 struct notif_client
*notif
= ¬if_client_stop
;
9791 /* Kill the fork child threads of any threads in process PID
9792 that are stopped at a fork event. */
9793 for (thread_info
*thread
: all_non_exited_threads (this))
9795 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9797 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9799 int child_pid
= ws
->value
.related_pid
.pid ();
9802 res
= remote_vkill (child_pid
);
9804 error (_("Can't kill fork child process %d"), child_pid
);
9808 /* Check for any pending fork events (not reported or processed yet)
9809 in process PID and kill those fork child threads as well. */
9810 remote_notif_get_pending_events (notif
);
9811 for (auto &event
: rs
->stop_reply_queue
)
9812 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
9814 int child_pid
= event
->ws
.value
.related_pid
.pid ();
9817 res
= remote_vkill (child_pid
);
9819 error (_("Can't kill fork child process %d"), child_pid
);
9824 /* Target hook to kill the current inferior. */
9827 remote_target::kill ()
9830 int pid
= inferior_ptid
.pid ();
9831 struct remote_state
*rs
= get_remote_state ();
9833 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9835 /* If we're stopped while forking and we haven't followed yet,
9836 kill the child task. We need to do this before killing the
9837 parent task because if this is a vfork then the parent will
9839 kill_new_fork_children (pid
);
9841 res
= remote_vkill (pid
);
9844 target_mourn_inferior (inferior_ptid
);
9849 /* If we are in 'target remote' mode and we are killing the only
9850 inferior, then we will tell gdbserver to exit and unpush the
9852 if (res
== -1 && !remote_multi_process_p (rs
)
9853 && number_of_live_inferiors (this) == 1)
9857 /* We've killed the remote end, we get to mourn it. If we are
9858 not in extended mode, mourning the inferior also unpushes
9859 remote_ops from the target stack, which closes the remote
9861 target_mourn_inferior (inferior_ptid
);
9866 error (_("Can't kill process"));
9869 /* Send a kill request to the target using the 'vKill' packet. */
9872 remote_target::remote_vkill (int pid
)
9874 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9877 remote_state
*rs
= get_remote_state ();
9879 /* Tell the remote target to detach. */
9880 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
9882 getpkt (&rs
->buf
, 0);
9884 switch (packet_ok (rs
->buf
,
9885 &remote_protocol_packets
[PACKET_vKill
]))
9891 case PACKET_UNKNOWN
:
9894 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9898 /* Send a kill request to the target using the 'k' packet. */
9901 remote_target::remote_kill_k ()
9903 /* Catch errors so the user can quit from gdb even when we
9904 aren't on speaking terms with the remote system. */
9909 catch (const gdb_exception_error
&ex
)
9911 if (ex
.error
== TARGET_CLOSE_ERROR
)
9913 /* If we got an (EOF) error that caused the target
9914 to go away, then we're done, that's what we wanted.
9915 "k" is susceptible to cause a premature EOF, given
9916 that the remote server isn't actually required to
9917 reply to "k", and it can happen that it doesn't
9918 even get to reply ACK to the "k". */
9922 /* Otherwise, something went wrong. We didn't actually kill
9923 the target. Just propagate the exception, and let the
9924 user or higher layers decide what to do. */
9930 remote_target::mourn_inferior ()
9932 struct remote_state
*rs
= get_remote_state ();
9934 /* We're no longer interested in notification events of an inferior
9935 that exited or was killed/detached. */
9936 discard_pending_stop_replies (current_inferior ());
9938 /* In 'target remote' mode with one inferior, we close the connection. */
9939 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
9941 remote_unpush_target (this);
9945 /* In case we got here due to an error, but we're going to stay
9947 rs
->waiting_for_stop_reply
= 0;
9949 /* If the current general thread belonged to the process we just
9950 detached from or has exited, the remote side current general
9951 thread becomes undefined. Considering a case like this:
9953 - We just got here due to a detach.
9954 - The process that we're detaching from happens to immediately
9955 report a global breakpoint being hit in non-stop mode, in the
9956 same thread we had selected before.
9957 - GDB attaches to this process again.
9958 - This event happens to be the next event we handle.
9960 GDB would consider that the current general thread didn't need to
9961 be set on the stub side (with Hg), since for all it knew,
9962 GENERAL_THREAD hadn't changed.
9964 Notice that although in all-stop mode, the remote server always
9965 sets the current thread to the thread reporting the stop event,
9966 that doesn't happen in non-stop mode; in non-stop, the stub *must
9967 not* change the current thread when reporting a breakpoint hit,
9968 due to the decoupling of event reporting and event handling.
9970 To keep things simple, we always invalidate our notion of the
9972 record_currthread (rs
, minus_one_ptid
);
9974 /* Call common code to mark the inferior as not running. */
9975 generic_mourn_inferior ();
9979 extended_remote_target::supports_disable_randomization ()
9981 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9985 remote_target::extended_remote_disable_randomization (int val
)
9987 struct remote_state
*rs
= get_remote_state ();
9990 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
9991 "QDisableRandomization:%x", val
);
9993 reply
= remote_get_noisy_reply ();
9995 error (_("Target does not support QDisableRandomization."));
9996 if (strcmp (reply
, "OK") != 0)
9997 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10001 remote_target::extended_remote_run (const std::string
&args
)
10003 struct remote_state
*rs
= get_remote_state ();
10005 const char *remote_exec_file
= get_remote_exec_file ();
10007 /* If the user has disabled vRun support, or we have detected that
10008 support is not available, do not try it. */
10009 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10012 strcpy (rs
->buf
.data (), "vRun;");
10013 len
= strlen (rs
->buf
.data ());
10015 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10016 error (_("Remote file name too long for run packet"));
10017 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10018 strlen (remote_exec_file
));
10020 if (!args
.empty ())
10024 gdb_argv
argv (args
.c_str ());
10025 for (i
= 0; argv
[i
] != NULL
; i
++)
10027 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10028 error (_("Argument list too long for run packet"));
10029 rs
->buf
[len
++] = ';';
10030 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10035 rs
->buf
[len
++] = '\0';
10038 getpkt (&rs
->buf
, 0);
10040 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10043 /* We have a wait response. All is well. */
10045 case PACKET_UNKNOWN
:
10048 if (remote_exec_file
[0] == '\0')
10049 error (_("Running the default executable on the remote target failed; "
10050 "try \"set remote exec-file\"?"));
10052 error (_("Running \"%s\" on the remote target failed"),
10055 gdb_assert_not_reached (_("bad switch"));
10059 /* Helper function to send set/unset environment packets. ACTION is
10060 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10061 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10065 remote_target::send_environment_packet (const char *action
,
10066 const char *packet
,
10069 remote_state
*rs
= get_remote_state ();
10071 /* Convert the environment variable to an hex string, which
10072 is the best format to be transmitted over the wire. */
10073 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10076 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10077 "%s:%s", packet
, encoded_value
.c_str ());
10080 getpkt (&rs
->buf
, 0);
10081 if (strcmp (rs
->buf
.data (), "OK") != 0)
10082 warning (_("Unable to %s environment variable '%s' on remote."),
10086 /* Helper function to handle the QEnvironment* packets. */
10089 remote_target::extended_remote_environment_support ()
10091 remote_state
*rs
= get_remote_state ();
10093 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10095 putpkt ("QEnvironmentReset");
10096 getpkt (&rs
->buf
, 0);
10097 if (strcmp (rs
->buf
.data (), "OK") != 0)
10098 warning (_("Unable to reset environment on remote."));
10101 gdb_environ
*e
= ¤t_inferior ()->environment
;
10103 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10104 for (const std::string
&el
: e
->user_set_env ())
10105 send_environment_packet ("set", "QEnvironmentHexEncoded",
10108 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10109 for (const std::string
&el
: e
->user_unset_env ())
10110 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10113 /* Helper function to set the current working directory for the
10114 inferior in the remote target. */
10117 remote_target::extended_remote_set_inferior_cwd ()
10119 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10121 const char *inferior_cwd
= get_inferior_cwd ();
10122 remote_state
*rs
= get_remote_state ();
10124 if (inferior_cwd
!= NULL
)
10126 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10127 strlen (inferior_cwd
));
10129 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10130 "QSetWorkingDir:%s", hexpath
.c_str ());
10134 /* An empty inferior_cwd means that the user wants us to
10135 reset the remote server's inferior's cwd. */
10136 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10137 "QSetWorkingDir:");
10141 getpkt (&rs
->buf
, 0);
10142 if (packet_ok (rs
->buf
,
10143 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10146 Remote replied unexpectedly while setting the inferior's working\n\
10153 /* In the extended protocol we want to be able to do things like
10154 "run" and have them basically work as expected. So we need
10155 a special create_inferior function. We support changing the
10156 executable file and the command line arguments, but not the
10160 extended_remote_target::create_inferior (const char *exec_file
,
10161 const std::string
&args
,
10162 char **env
, int from_tty
)
10166 struct remote_state
*rs
= get_remote_state ();
10167 const char *remote_exec_file
= get_remote_exec_file ();
10169 /* If running asynchronously, register the target file descriptor
10170 with the event loop. */
10171 if (target_can_async_p ())
10174 /* Disable address space randomization if requested (and supported). */
10175 if (supports_disable_randomization ())
10176 extended_remote_disable_randomization (disable_randomization
);
10178 /* If startup-with-shell is on, we inform gdbserver to start the
10179 remote inferior using a shell. */
10180 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10182 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10183 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10185 getpkt (&rs
->buf
, 0);
10186 if (strcmp (rs
->buf
.data (), "OK") != 0)
10188 Remote replied unexpectedly while setting startup-with-shell: %s"),
10192 extended_remote_environment_support ();
10194 extended_remote_set_inferior_cwd ();
10196 /* Now restart the remote server. */
10197 run_worked
= extended_remote_run (args
) != -1;
10200 /* vRun was not supported. Fail if we need it to do what the
10202 if (remote_exec_file
[0])
10203 error (_("Remote target does not support \"set remote exec-file\""));
10204 if (!args
.empty ())
10205 error (_("Remote target does not support \"set args\" or run ARGS"));
10207 /* Fall back to "R". */
10208 extended_remote_restart ();
10211 /* vRun's success return is a stop reply. */
10212 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10213 add_current_inferior_and_thread (stop_reply
);
10215 /* Get updated offsets, if the stub uses qOffsets. */
10220 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10221 the list of conditions (in agent expression bytecode format), if any, the
10222 target needs to evaluate. The output is placed into the packet buffer
10223 started from BUF and ended at BUF_END. */
10226 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10227 struct bp_target_info
*bp_tgt
, char *buf
,
10230 if (bp_tgt
->conditions
.empty ())
10233 buf
+= strlen (buf
);
10234 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10237 /* Send conditions to the target. */
10238 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10240 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10241 buf
+= strlen (buf
);
10242 for (int i
= 0; i
< aexpr
->len
; ++i
)
10243 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10250 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10251 struct bp_target_info
*bp_tgt
, char *buf
)
10253 if (bp_tgt
->tcommands
.empty ())
10256 buf
+= strlen (buf
);
10258 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10259 buf
+= strlen (buf
);
10261 /* Concatenate all the agent expressions that are commands into the
10263 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10265 sprintf (buf
, "X%x,", aexpr
->len
);
10266 buf
+= strlen (buf
);
10267 for (int i
= 0; i
< aexpr
->len
; ++i
)
10268 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10273 /* Insert a breakpoint. On targets that have software breakpoint
10274 support, we ask the remote target to do the work; on targets
10275 which don't, we insert a traditional memory breakpoint. */
10278 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10279 struct bp_target_info
*bp_tgt
)
10281 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10282 If it succeeds, then set the support to PACKET_ENABLE. If it
10283 fails, and the user has explicitly requested the Z support then
10284 report an error, otherwise, mark it disabled and go on. */
10286 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10288 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10289 struct remote_state
*rs
;
10292 /* Make sure the remote is pointing at the right process, if
10294 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10295 set_general_process ();
10297 rs
= get_remote_state ();
10298 p
= rs
->buf
.data ();
10299 endbuf
= p
+ get_remote_packet_size ();
10304 addr
= (ULONGEST
) remote_address_masked (addr
);
10305 p
+= hexnumstr (p
, addr
);
10306 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10308 if (supports_evaluation_of_breakpoint_conditions ())
10309 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10311 if (can_run_breakpoint_commands ())
10312 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10315 getpkt (&rs
->buf
, 0);
10317 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10323 case PACKET_UNKNOWN
:
10328 /* If this breakpoint has target-side commands but this stub doesn't
10329 support Z0 packets, throw error. */
10330 if (!bp_tgt
->tcommands
.empty ())
10331 throw_error (NOT_SUPPORTED_ERROR
, _("\
10332 Target doesn't support breakpoints that have target side commands."));
10334 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10338 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10339 struct bp_target_info
*bp_tgt
,
10340 enum remove_bp_reason reason
)
10342 CORE_ADDR addr
= bp_tgt
->placed_address
;
10343 struct remote_state
*rs
= get_remote_state ();
10345 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10347 char *p
= rs
->buf
.data ();
10348 char *endbuf
= p
+ get_remote_packet_size ();
10350 /* Make sure the remote is pointing at the right process, if
10352 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10353 set_general_process ();
10359 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10360 p
+= hexnumstr (p
, addr
);
10361 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10364 getpkt (&rs
->buf
, 0);
10366 return (rs
->buf
[0] == 'E');
10369 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10372 static enum Z_packet_type
10373 watchpoint_to_Z_packet (int type
)
10378 return Z_PACKET_WRITE_WP
;
10381 return Z_PACKET_READ_WP
;
10384 return Z_PACKET_ACCESS_WP
;
10387 internal_error (__FILE__
, __LINE__
,
10388 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10393 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10394 enum target_hw_bp_type type
, struct expression
*cond
)
10396 struct remote_state
*rs
= get_remote_state ();
10397 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10399 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10401 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10404 /* Make sure the remote is pointing at the right process, if
10406 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10407 set_general_process ();
10409 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10410 p
= strchr (rs
->buf
.data (), '\0');
10411 addr
= remote_address_masked (addr
);
10412 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10413 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10416 getpkt (&rs
->buf
, 0);
10418 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10422 case PACKET_UNKNOWN
:
10427 internal_error (__FILE__
, __LINE__
,
10428 _("remote_insert_watchpoint: reached end of function"));
10432 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10433 CORE_ADDR start
, int length
)
10435 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10437 return diff
< length
;
10442 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10443 enum target_hw_bp_type type
, struct expression
*cond
)
10445 struct remote_state
*rs
= get_remote_state ();
10446 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10448 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10450 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10453 /* Make sure the remote is pointing at the right process, if
10455 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10456 set_general_process ();
10458 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10459 p
= strchr (rs
->buf
.data (), '\0');
10460 addr
= remote_address_masked (addr
);
10461 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10462 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10464 getpkt (&rs
->buf
, 0);
10466 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10469 case PACKET_UNKNOWN
:
10474 internal_error (__FILE__
, __LINE__
,
10475 _("remote_remove_watchpoint: reached end of function"));
10479 static int remote_hw_watchpoint_limit
= -1;
10480 static int remote_hw_watchpoint_length_limit
= -1;
10481 static int remote_hw_breakpoint_limit
= -1;
10484 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10486 if (remote_hw_watchpoint_length_limit
== 0)
10488 else if (remote_hw_watchpoint_length_limit
< 0)
10490 else if (len
<= remote_hw_watchpoint_length_limit
)
10497 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10499 if (type
== bp_hardware_breakpoint
)
10501 if (remote_hw_breakpoint_limit
== 0)
10503 else if (remote_hw_breakpoint_limit
< 0)
10505 else if (cnt
<= remote_hw_breakpoint_limit
)
10510 if (remote_hw_watchpoint_limit
== 0)
10512 else if (remote_hw_watchpoint_limit
< 0)
10516 else if (cnt
<= remote_hw_watchpoint_limit
)
10522 /* The to_stopped_by_sw_breakpoint method of target remote. */
10525 remote_target::stopped_by_sw_breakpoint ()
10527 struct thread_info
*thread
= inferior_thread ();
10529 return (thread
->priv
!= NULL
10530 && (get_remote_thread_info (thread
)->stop_reason
10531 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10534 /* The to_supports_stopped_by_sw_breakpoint method of target
10538 remote_target::supports_stopped_by_sw_breakpoint ()
10540 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10543 /* The to_stopped_by_hw_breakpoint method of target remote. */
10546 remote_target::stopped_by_hw_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_HW_BREAKPOINT
));
10555 /* The to_supports_stopped_by_hw_breakpoint method of target
10559 remote_target::supports_stopped_by_hw_breakpoint ()
10561 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10565 remote_target::stopped_by_watchpoint ()
10567 struct thread_info
*thread
= inferior_thread ();
10569 return (thread
->priv
!= NULL
10570 && (get_remote_thread_info (thread
)->stop_reason
10571 == TARGET_STOPPED_BY_WATCHPOINT
));
10575 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10577 struct thread_info
*thread
= inferior_thread ();
10579 if (thread
->priv
!= NULL
10580 && (get_remote_thread_info (thread
)->stop_reason
10581 == TARGET_STOPPED_BY_WATCHPOINT
))
10583 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10592 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10593 struct bp_target_info
*bp_tgt
)
10595 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10596 struct remote_state
*rs
;
10600 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10603 /* Make sure the remote is pointing at the right process, if
10605 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10606 set_general_process ();
10608 rs
= get_remote_state ();
10609 p
= rs
->buf
.data ();
10610 endbuf
= p
+ get_remote_packet_size ();
10616 addr
= remote_address_masked (addr
);
10617 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10618 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10620 if (supports_evaluation_of_breakpoint_conditions ())
10621 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10623 if (can_run_breakpoint_commands ())
10624 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10627 getpkt (&rs
->buf
, 0);
10629 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10632 if (rs
->buf
[1] == '.')
10634 message
= strchr (&rs
->buf
[2], '.');
10636 error (_("Remote failure reply: %s"), message
+ 1);
10639 case PACKET_UNKNOWN
:
10644 internal_error (__FILE__
, __LINE__
,
10645 _("remote_insert_hw_breakpoint: reached end of function"));
10650 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10651 struct bp_target_info
*bp_tgt
)
10654 struct remote_state
*rs
= get_remote_state ();
10655 char *p
= rs
->buf
.data ();
10656 char *endbuf
= p
+ get_remote_packet_size ();
10658 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10661 /* Make sure the remote is pointing at the right process, if
10663 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10664 set_general_process ();
10670 addr
= remote_address_masked (bp_tgt
->placed_address
);
10671 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10672 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10675 getpkt (&rs
->buf
, 0);
10677 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10680 case PACKET_UNKNOWN
:
10685 internal_error (__FILE__
, __LINE__
,
10686 _("remote_remove_hw_breakpoint: reached end of function"));
10689 /* Verify memory using the "qCRC:" request. */
10692 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10694 struct remote_state
*rs
= get_remote_state ();
10695 unsigned long host_crc
, target_crc
;
10698 /* It doesn't make sense to use qCRC if the remote target is
10699 connected but not running. */
10700 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10702 enum packet_result result
;
10704 /* Make sure the remote is pointing at the right process. */
10705 set_general_process ();
10707 /* FIXME: assumes lma can fit into long. */
10708 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10709 (long) lma
, (long) size
);
10712 /* Be clever; compute the host_crc before waiting for target
10714 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10716 getpkt (&rs
->buf
, 0);
10718 result
= packet_ok (rs
->buf
,
10719 &remote_protocol_packets
[PACKET_qCRC
]);
10720 if (result
== PACKET_ERROR
)
10722 else if (result
== PACKET_OK
)
10724 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10725 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10727 return (host_crc
== target_crc
);
10731 return simple_verify_memory (this, data
, lma
, size
);
10734 /* compare-sections command
10736 With no arguments, compares each loadable section in the exec bfd
10737 with the same memory range on the target, and reports mismatches.
10738 Useful for verifying the image on the target against the exec file. */
10741 compare_sections_command (const char *args
, int from_tty
)
10744 const char *sectname
;
10745 bfd_size_type size
;
10748 int mismatched
= 0;
10753 error (_("command cannot be used without an exec file"));
10755 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10761 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10763 if (!(s
->flags
& SEC_LOAD
))
10764 continue; /* Skip non-loadable section. */
10766 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10767 continue; /* Skip writeable sections */
10769 size
= bfd_section_size (s
);
10771 continue; /* Skip zero-length section. */
10773 sectname
= bfd_section_name (s
);
10774 if (args
&& strcmp (args
, sectname
) != 0)
10775 continue; /* Not the section selected by user. */
10777 matched
= 1; /* Do this section. */
10780 gdb::byte_vector
sectdata (size
);
10781 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10783 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10786 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10787 paddress (target_gdbarch (), lma
),
10788 paddress (target_gdbarch (), lma
+ size
));
10790 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10791 paddress (target_gdbarch (), lma
),
10792 paddress (target_gdbarch (), lma
+ size
));
10794 printf_filtered ("matched.\n");
10797 printf_filtered ("MIS-MATCHED!\n");
10801 if (mismatched
> 0)
10802 warning (_("One or more sections of the target image does not match\n\
10803 the loaded file\n"));
10804 if (args
&& !matched
)
10805 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10808 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10809 into remote target. The number of bytes written to the remote
10810 target is returned, or -1 for error. */
10813 remote_target::remote_write_qxfer (const char *object_name
,
10814 const char *annex
, const gdb_byte
*writebuf
,
10815 ULONGEST offset
, LONGEST len
,
10816 ULONGEST
*xfered_len
,
10817 struct packet_config
*packet
)
10821 struct remote_state
*rs
= get_remote_state ();
10822 int max_size
= get_memory_write_packet_size ();
10824 if (packet_config_support (packet
) == PACKET_DISABLE
)
10825 return TARGET_XFER_E_IO
;
10827 /* Insert header. */
10828 i
= snprintf (rs
->buf
.data (), max_size
,
10829 "qXfer:%s:write:%s:%s:",
10830 object_name
, annex
? annex
: "",
10831 phex_nz (offset
, sizeof offset
));
10832 max_size
-= (i
+ 1);
10834 /* Escape as much data as fits into rs->buf. */
10835 buf_len
= remote_escape_output
10836 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
10838 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
10839 || getpkt_sane (&rs
->buf
, 0) < 0
10840 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10841 return TARGET_XFER_E_IO
;
10843 unpack_varlen_hex (rs
->buf
.data (), &n
);
10846 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10849 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10850 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10851 number of bytes read is returned, or 0 for EOF, or -1 for error.
10852 The number of bytes read may be less than LEN without indicating an
10853 EOF. PACKET is checked and updated to indicate whether the remote
10854 target supports this object. */
10857 remote_target::remote_read_qxfer (const char *object_name
,
10859 gdb_byte
*readbuf
, ULONGEST offset
,
10861 ULONGEST
*xfered_len
,
10862 struct packet_config
*packet
)
10864 struct remote_state
*rs
= get_remote_state ();
10865 LONGEST i
, n
, packet_len
;
10867 if (packet_config_support (packet
) == PACKET_DISABLE
)
10868 return TARGET_XFER_E_IO
;
10870 /* Check whether we've cached an end-of-object packet that matches
10872 if (rs
->finished_object
)
10874 if (strcmp (object_name
, rs
->finished_object
) == 0
10875 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10876 && offset
== rs
->finished_offset
)
10877 return TARGET_XFER_EOF
;
10880 /* Otherwise, we're now reading something different. Discard
10882 xfree (rs
->finished_object
);
10883 xfree (rs
->finished_annex
);
10884 rs
->finished_object
= NULL
;
10885 rs
->finished_annex
= NULL
;
10888 /* Request only enough to fit in a single packet. The actual data
10889 may not, since we don't know how much of it will need to be escaped;
10890 the target is free to respond with slightly less data. We subtract
10891 five to account for the response type and the protocol frame. */
10892 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10893 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
10894 "qXfer:%s:read:%s:%s,%s",
10895 object_name
, annex
? annex
: "",
10896 phex_nz (offset
, sizeof offset
),
10897 phex_nz (n
, sizeof n
));
10898 i
= putpkt (rs
->buf
);
10900 return TARGET_XFER_E_IO
;
10903 packet_len
= getpkt_sane (&rs
->buf
, 0);
10904 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10905 return TARGET_XFER_E_IO
;
10907 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10908 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
10910 /* 'm' means there is (or at least might be) more data after this
10911 batch. That does not make sense unless there's at least one byte
10912 of data in this reply. */
10913 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10914 error (_("Remote qXfer reply contained no data."));
10916 /* Got some data. */
10917 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
10918 packet_len
- 1, readbuf
, n
);
10920 /* 'l' is an EOF marker, possibly including a final block of data,
10921 or possibly empty. If we have the final block of a non-empty
10922 object, record this fact to bypass a subsequent partial read. */
10923 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10925 rs
->finished_object
= xstrdup (object_name
);
10926 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10927 rs
->finished_offset
= offset
+ i
;
10931 return TARGET_XFER_EOF
;
10935 return TARGET_XFER_OK
;
10939 enum target_xfer_status
10940 remote_target::xfer_partial (enum target_object object
,
10941 const char *annex
, gdb_byte
*readbuf
,
10942 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10943 ULONGEST
*xfered_len
)
10945 struct remote_state
*rs
;
10949 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10951 set_remote_traceframe ();
10952 set_general_thread (inferior_ptid
);
10954 rs
= get_remote_state ();
10956 /* Handle memory using the standard memory routines. */
10957 if (object
== TARGET_OBJECT_MEMORY
)
10959 /* If the remote target is connected but not running, we should
10960 pass this request down to a lower stratum (e.g. the executable
10962 if (!target_has_execution
)
10963 return TARGET_XFER_EOF
;
10965 if (writebuf
!= NULL
)
10966 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10969 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
10973 /* Handle extra signal info using qxfer packets. */
10974 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10977 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
10978 xfered_len
, &remote_protocol_packets
10979 [PACKET_qXfer_siginfo_read
]);
10981 return remote_write_qxfer ("siginfo", annex
,
10982 writebuf
, offset
, len
, xfered_len
,
10983 &remote_protocol_packets
10984 [PACKET_qXfer_siginfo_write
]);
10987 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10990 return remote_read_qxfer ("statictrace", annex
,
10991 readbuf
, offset
, len
, xfered_len
,
10992 &remote_protocol_packets
10993 [PACKET_qXfer_statictrace_read
]);
10995 return TARGET_XFER_E_IO
;
10998 /* Only handle flash writes. */
10999 if (writebuf
!= NULL
)
11003 case TARGET_OBJECT_FLASH
:
11004 return remote_flash_write (offset
, len
, xfered_len
,
11008 return TARGET_XFER_E_IO
;
11012 /* Map pre-existing objects onto letters. DO NOT do this for new
11013 objects!!! Instead specify new query packets. */
11016 case TARGET_OBJECT_AVR
:
11020 case TARGET_OBJECT_AUXV
:
11021 gdb_assert (annex
== NULL
);
11022 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
11024 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
11026 case TARGET_OBJECT_AVAILABLE_FEATURES
:
11027 return remote_read_qxfer
11028 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
11029 &remote_protocol_packets
[PACKET_qXfer_features
]);
11031 case TARGET_OBJECT_LIBRARIES
:
11032 return remote_read_qxfer
11033 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
11034 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
11036 case TARGET_OBJECT_LIBRARIES_SVR4
:
11037 return remote_read_qxfer
11038 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
11039 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
11041 case TARGET_OBJECT_MEMORY_MAP
:
11042 gdb_assert (annex
== NULL
);
11043 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
11045 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
11047 case TARGET_OBJECT_OSDATA
:
11048 /* Should only get here if we're connected. */
11049 gdb_assert (rs
->remote_desc
);
11050 return remote_read_qxfer
11051 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
11052 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
11054 case TARGET_OBJECT_THREADS
:
11055 gdb_assert (annex
== NULL
);
11056 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
11058 &remote_protocol_packets
[PACKET_qXfer_threads
]);
11060 case TARGET_OBJECT_TRACEFRAME_INFO
:
11061 gdb_assert (annex
== NULL
);
11062 return remote_read_qxfer
11063 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11064 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11066 case TARGET_OBJECT_FDPIC
:
11067 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11069 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11071 case TARGET_OBJECT_OPENVMS_UIB
:
11072 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11074 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11076 case TARGET_OBJECT_BTRACE
:
11077 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11079 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11081 case TARGET_OBJECT_BTRACE_CONF
:
11082 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11084 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11086 case TARGET_OBJECT_EXEC_FILE
:
11087 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11089 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11092 return TARGET_XFER_E_IO
;
11095 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11096 large enough let the caller deal with it. */
11097 if (len
< get_remote_packet_size ())
11098 return TARGET_XFER_E_IO
;
11099 len
= get_remote_packet_size ();
11101 /* Except for querying the minimum buffer size, target must be open. */
11102 if (!rs
->remote_desc
)
11103 error (_("remote query is only available after target open"));
11105 gdb_assert (annex
!= NULL
);
11106 gdb_assert (readbuf
!= NULL
);
11108 p2
= rs
->buf
.data ();
11110 *p2
++ = query_type
;
11112 /* We used one buffer char for the remote protocol q command and
11113 another for the query type. As the remote protocol encapsulation
11114 uses 4 chars plus one extra in case we are debugging
11115 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11118 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11120 /* Bad caller may have sent forbidden characters. */
11121 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11126 gdb_assert (annex
[i
] == '\0');
11128 i
= putpkt (rs
->buf
);
11130 return TARGET_XFER_E_IO
;
11132 getpkt (&rs
->buf
, 0);
11133 strcpy ((char *) readbuf
, rs
->buf
.data ());
11135 *xfered_len
= strlen ((char *) readbuf
);
11136 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11139 /* Implementation of to_get_memory_xfer_limit. */
11142 remote_target::get_memory_xfer_limit ()
11144 return get_memory_write_packet_size ();
11148 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11149 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11150 CORE_ADDR
*found_addrp
)
11152 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11153 struct remote_state
*rs
= get_remote_state ();
11154 int max_size
= get_memory_write_packet_size ();
11155 struct packet_config
*packet
=
11156 &remote_protocol_packets
[PACKET_qSearch_memory
];
11157 /* Number of packet bytes used to encode the pattern;
11158 this could be more than PATTERN_LEN due to escape characters. */
11159 int escaped_pattern_len
;
11160 /* Amount of pattern that was encodable in the packet. */
11161 int used_pattern_len
;
11164 ULONGEST found_addr
;
11166 /* Don't go to the target if we don't have to. This is done before
11167 checking packet_config_support to avoid the possibility that a
11168 success for this edge case means the facility works in
11170 if (pattern_len
> search_space_len
)
11172 if (pattern_len
== 0)
11174 *found_addrp
= start_addr
;
11178 /* If we already know the packet isn't supported, fall back to the simple
11179 way of searching memory. */
11181 if (packet_config_support (packet
) == PACKET_DISABLE
)
11183 /* Target doesn't provided special support, fall back and use the
11184 standard support (copy memory and do the search here). */
11185 return simple_search_memory (this, start_addr
, search_space_len
,
11186 pattern
, pattern_len
, found_addrp
);
11189 /* Make sure the remote is pointing at the right process. */
11190 set_general_process ();
11192 /* Insert header. */
11193 i
= snprintf (rs
->buf
.data (), max_size
,
11194 "qSearch:memory:%s;%s;",
11195 phex_nz (start_addr
, addr_size
),
11196 phex_nz (search_space_len
, sizeof (search_space_len
)));
11197 max_size
-= (i
+ 1);
11199 /* Escape as much data as fits into rs->buf. */
11200 escaped_pattern_len
=
11201 remote_escape_output (pattern
, pattern_len
, 1,
11202 (gdb_byte
*) rs
->buf
.data () + i
,
11203 &used_pattern_len
, max_size
);
11205 /* Bail if the pattern is too large. */
11206 if (used_pattern_len
!= pattern_len
)
11207 error (_("Pattern is too large to transmit to remote target."));
11209 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11210 || getpkt_sane (&rs
->buf
, 0) < 0
11211 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11213 /* The request may not have worked because the command is not
11214 supported. If so, fall back to the simple way. */
11215 if (packet_config_support (packet
) == PACKET_DISABLE
)
11217 return simple_search_memory (this, start_addr
, search_space_len
,
11218 pattern
, pattern_len
, found_addrp
);
11223 if (rs
->buf
[0] == '0')
11225 else if (rs
->buf
[0] == '1')
11228 if (rs
->buf
[1] != ',')
11229 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11230 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11231 *found_addrp
= found_addr
;
11234 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11240 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11242 struct remote_state
*rs
= get_remote_state ();
11243 char *p
= rs
->buf
.data ();
11245 if (!rs
->remote_desc
)
11246 error (_("remote rcmd is only available after target open"));
11248 /* Send a NULL command across as an empty command. */
11249 if (command
== NULL
)
11252 /* The query prefix. */
11253 strcpy (rs
->buf
.data (), "qRcmd,");
11254 p
= strchr (rs
->buf
.data (), '\0');
11256 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11257 > get_remote_packet_size ())
11258 error (_("\"monitor\" command ``%s'' is too long."), command
);
11260 /* Encode the actual command. */
11261 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11263 if (putpkt (rs
->buf
) < 0)
11264 error (_("Communication problem with target."));
11266 /* get/display the response */
11271 /* XXX - see also remote_get_noisy_reply(). */
11272 QUIT
; /* Allow user to bail out with ^C. */
11274 if (getpkt_sane (&rs
->buf
, 0) == -1)
11276 /* Timeout. Continue to (try to) read responses.
11277 This is better than stopping with an error, assuming the stub
11278 is still executing the (long) monitor command.
11279 If needed, the user can interrupt gdb using C-c, obtaining
11280 an effect similar to stop on timeout. */
11283 buf
= rs
->buf
.data ();
11284 if (buf
[0] == '\0')
11285 error (_("Target does not support this command."));
11286 if (buf
[0] == 'O' && buf
[1] != 'K')
11288 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11291 if (strcmp (buf
, "OK") == 0)
11293 if (strlen (buf
) == 3 && buf
[0] == 'E'
11294 && isdigit (buf
[1]) && isdigit (buf
[2]))
11296 error (_("Protocol error with Rcmd"));
11298 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11300 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11302 fputc_unfiltered (c
, outbuf
);
11308 std::vector
<mem_region
>
11309 remote_target::memory_map ()
11311 std::vector
<mem_region
> result
;
11312 gdb::optional
<gdb::char_vector
> text
11313 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP
, NULL
);
11316 result
= parse_memory_map (text
->data ());
11322 packet_command (const char *args
, int from_tty
)
11324 remote_target
*remote
= get_current_remote_target ();
11326 if (remote
== nullptr)
11327 error (_("command can only be used with remote target"));
11329 remote
->packet_command (args
, from_tty
);
11333 remote_target::packet_command (const char *args
, int from_tty
)
11336 error (_("remote-packet command requires packet text as argument"));
11338 puts_filtered ("sending: ");
11339 print_packet (args
);
11340 puts_filtered ("\n");
11343 remote_state
*rs
= get_remote_state ();
11345 getpkt (&rs
->buf
, 0);
11346 puts_filtered ("received: ");
11347 print_packet (rs
->buf
.data ());
11348 puts_filtered ("\n");
11352 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11354 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11356 static void threadset_test_cmd (char *cmd
, int tty
);
11358 static void threadalive_test (char *cmd
, int tty
);
11360 static void threadlist_test_cmd (char *cmd
, int tty
);
11362 int get_and_display_threadinfo (threadref
*ref
);
11364 static void threadinfo_test_cmd (char *cmd
, int tty
);
11366 static int thread_display_step (threadref
*ref
, void *context
);
11368 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11370 static void init_remote_threadtests (void);
11372 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11375 threadset_test_cmd (const char *cmd
, int tty
)
11377 int sample_thread
= SAMPLE_THREAD
;
11379 printf_filtered (_("Remote threadset test\n"));
11380 set_general_thread (sample_thread
);
11385 threadalive_test (const char *cmd
, int tty
)
11387 int sample_thread
= SAMPLE_THREAD
;
11388 int pid
= inferior_ptid
.pid ();
11389 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11391 if (remote_thread_alive (ptid
))
11392 printf_filtered ("PASS: Thread alive test\n");
11394 printf_filtered ("FAIL: Thread alive test\n");
11397 void output_threadid (char *title
, threadref
*ref
);
11400 output_threadid (char *title
, threadref
*ref
)
11404 pack_threadid (&hexid
[0], ref
); /* Convert thread id into hex. */
11406 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11410 threadlist_test_cmd (const char *cmd
, int tty
)
11413 threadref nextthread
;
11414 int done
, result_count
;
11415 threadref threadlist
[3];
11417 printf_filtered ("Remote Threadlist test\n");
11418 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11419 &result_count
, &threadlist
[0]))
11420 printf_filtered ("FAIL: threadlist test\n");
11423 threadref
*scan
= threadlist
;
11424 threadref
*limit
= scan
+ result_count
;
11426 while (scan
< limit
)
11427 output_threadid (" thread ", scan
++);
11432 display_thread_info (struct gdb_ext_thread_info
*info
)
11434 output_threadid ("Threadid: ", &info
->threadid
);
11435 printf_filtered ("Name: %s\n ", info
->shortname
);
11436 printf_filtered ("State: %s\n", info
->display
);
11437 printf_filtered ("other: %s\n\n", info
->more_display
);
11441 get_and_display_threadinfo (threadref
*ref
)
11445 struct gdb_ext_thread_info threadinfo
;
11447 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11448 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11449 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11450 display_thread_info (&threadinfo
);
11455 threadinfo_test_cmd (const char *cmd
, int tty
)
11457 int athread
= SAMPLE_THREAD
;
11461 int_to_threadref (&thread
, athread
);
11462 printf_filtered ("Remote Threadinfo test\n");
11463 if (!get_and_display_threadinfo (&thread
))
11464 printf_filtered ("FAIL cannot get thread info\n");
11468 thread_display_step (threadref
*ref
, void *context
)
11470 /* output_threadid(" threadstep ",ref); *//* simple test */
11471 return get_and_display_threadinfo (ref
);
11475 threadlist_update_test_cmd (const char *cmd
, int tty
)
11477 printf_filtered ("Remote Threadlist update test\n");
11478 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11482 init_remote_threadtests (void)
11484 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11485 _("Fetch and print the remote list of "
11486 "thread identifiers, one pkt only."));
11487 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11488 _("Fetch and display info about one thread."));
11489 add_com ("tset", class_obscure
, threadset_test_cmd
,
11490 _("Test setting to a different thread."));
11491 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11492 _("Iterate through updating all remote thread info."));
11493 add_com ("talive", class_obscure
, threadalive_test
,
11494 _("Remote thread alive test."));
11499 /* Convert a thread ID to a string. */
11502 remote_target::pid_to_str (ptid_t ptid
)
11504 struct remote_state
*rs
= get_remote_state ();
11506 if (ptid
== null_ptid
)
11507 return normal_pid_to_str (ptid
);
11508 else if (ptid
.is_pid ())
11510 /* Printing an inferior target id. */
11512 /* When multi-process extensions are off, there's no way in the
11513 remote protocol to know the remote process id, if there's any
11514 at all. There's one exception --- when we're connected with
11515 target extended-remote, and we manually attached to a process
11516 with "attach PID". We don't record anywhere a flag that
11517 allows us to distinguish that case from the case of
11518 connecting with extended-remote and the stub already being
11519 attached to a process, and reporting yes to qAttached, hence
11520 no smart special casing here. */
11521 if (!remote_multi_process_p (rs
))
11522 return "Remote target";
11524 return normal_pid_to_str (ptid
);
11528 if (magic_null_ptid
== ptid
)
11529 return "Thread <main>";
11530 else if (remote_multi_process_p (rs
))
11531 if (ptid
.lwp () == 0)
11532 return normal_pid_to_str (ptid
);
11534 return string_printf ("Thread %d.%ld",
11535 ptid
.pid (), ptid
.lwp ());
11537 return string_printf ("Thread %ld", ptid
.lwp ());
11541 /* Get the address of the thread local variable in OBJFILE which is
11542 stored at OFFSET within the thread local storage for thread PTID. */
11545 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11548 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11550 struct remote_state
*rs
= get_remote_state ();
11551 char *p
= rs
->buf
.data ();
11552 char *endp
= p
+ get_remote_packet_size ();
11553 enum packet_result result
;
11555 strcpy (p
, "qGetTLSAddr:");
11557 p
= write_ptid (p
, endp
, ptid
);
11559 p
+= hexnumstr (p
, offset
);
11561 p
+= hexnumstr (p
, lm
);
11565 getpkt (&rs
->buf
, 0);
11566 result
= packet_ok (rs
->buf
,
11567 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11568 if (result
== PACKET_OK
)
11572 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11575 else if (result
== PACKET_UNKNOWN
)
11576 throw_error (TLS_GENERIC_ERROR
,
11577 _("Remote target doesn't support qGetTLSAddr packet"));
11579 throw_error (TLS_GENERIC_ERROR
,
11580 _("Remote target failed to process qGetTLSAddr request"));
11583 throw_error (TLS_GENERIC_ERROR
,
11584 _("TLS not supported or disabled on this target"));
11589 /* Provide thread local base, i.e. Thread Information Block address.
11590 Returns 1 if ptid is found and thread_local_base is non zero. */
11593 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11595 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11597 struct remote_state
*rs
= get_remote_state ();
11598 char *p
= rs
->buf
.data ();
11599 char *endp
= p
+ get_remote_packet_size ();
11600 enum packet_result result
;
11602 strcpy (p
, "qGetTIBAddr:");
11604 p
= write_ptid (p
, endp
, ptid
);
11608 getpkt (&rs
->buf
, 0);
11609 result
= packet_ok (rs
->buf
,
11610 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11611 if (result
== PACKET_OK
)
11614 unpack_varlen_hex (rs
->buf
.data (), &val
);
11616 *addr
= (CORE_ADDR
) val
;
11619 else if (result
== PACKET_UNKNOWN
)
11620 error (_("Remote target doesn't support qGetTIBAddr packet"));
11622 error (_("Remote target failed to process qGetTIBAddr request"));
11625 error (_("qGetTIBAddr not supported or disabled on this target"));
11630 /* Support for inferring a target description based on the current
11631 architecture and the size of a 'g' packet. While the 'g' packet
11632 can have any size (since optional registers can be left off the
11633 end), some sizes are easily recognizable given knowledge of the
11634 approximate architecture. */
11636 struct remote_g_packet_guess
11638 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11645 const struct target_desc
*tdesc
;
11648 struct remote_g_packet_data
: public allocate_on_obstack
11650 std::vector
<remote_g_packet_guess
> guesses
;
11653 static struct gdbarch_data
*remote_g_packet_data_handle
;
11656 remote_g_packet_data_init (struct obstack
*obstack
)
11658 return new (obstack
) remote_g_packet_data
;
11662 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11663 const struct target_desc
*tdesc
)
11665 struct remote_g_packet_data
*data
11666 = ((struct remote_g_packet_data
*)
11667 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11669 gdb_assert (tdesc
!= NULL
);
11671 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11672 if (guess
.bytes
== bytes
)
11673 internal_error (__FILE__
, __LINE__
,
11674 _("Duplicate g packet description added for size %d"),
11677 data
->guesses
.emplace_back (bytes
, tdesc
);
11680 /* Return true if remote_read_description would do anything on this target
11681 and architecture, false otherwise. */
11684 remote_read_description_p (struct target_ops
*target
)
11686 struct remote_g_packet_data
*data
11687 = ((struct remote_g_packet_data
*)
11688 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11690 return !data
->guesses
.empty ();
11693 const struct target_desc
*
11694 remote_target::read_description ()
11696 struct remote_g_packet_data
*data
11697 = ((struct remote_g_packet_data
*)
11698 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11700 /* Do not try this during initial connection, when we do not know
11701 whether there is a running but stopped thread. */
11702 if (!target_has_execution
|| inferior_ptid
== null_ptid
)
11703 return beneath ()->read_description ();
11705 if (!data
->guesses
.empty ())
11707 int bytes
= send_g_packet ();
11709 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11710 if (guess
.bytes
== bytes
)
11711 return guess
.tdesc
;
11713 /* We discard the g packet. A minor optimization would be to
11714 hold on to it, and fill the register cache once we have selected
11715 an architecture, but it's too tricky to do safely. */
11718 return beneath ()->read_description ();
11721 /* Remote file transfer support. This is host-initiated I/O, not
11722 target-initiated; for target-initiated, see remote-fileio.c. */
11724 /* If *LEFT is at least the length of STRING, copy STRING to
11725 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11726 decrease *LEFT. Otherwise raise an error. */
11729 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11731 int len
= strlen (string
);
11734 error (_("Packet too long for target."));
11736 memcpy (*buffer
, string
, len
);
11740 /* NUL-terminate the buffer as a convenience, if there is
11746 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11747 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11748 decrease *LEFT. Otherwise raise an error. */
11751 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11754 if (2 * len
> *left
)
11755 error (_("Packet too long for target."));
11757 bin2hex (bytes
, *buffer
, len
);
11758 *buffer
+= 2 * len
;
11761 /* NUL-terminate the buffer as a convenience, if there is
11767 /* If *LEFT is large enough, convert VALUE to hex and add it to
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_int (char **buffer
, int *left
, ULONGEST value
)
11774 int len
= hexnumlen (value
);
11777 error (_("Packet too long for target."));
11779 hexnumstr (*buffer
, value
);
11783 /* NUL-terminate the buffer as a convenience, if there is
11789 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11790 value, *REMOTE_ERRNO to the remote error number or zero if none
11791 was included, and *ATTACHMENT to point to the start of the annex
11792 if any. The length of the packet isn't needed here; there may
11793 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11795 Return 0 if the packet could be parsed, -1 if it could not. If
11796 -1 is returned, the other variables may not be initialized. */
11799 remote_hostio_parse_result (char *buffer
, int *retcode
,
11800 int *remote_errno
, char **attachment
)
11805 *attachment
= NULL
;
11807 if (buffer
[0] != 'F')
11811 *retcode
= strtol (&buffer
[1], &p
, 16);
11812 if (errno
!= 0 || p
== &buffer
[1])
11815 /* Check for ",errno". */
11819 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11820 if (errno
!= 0 || p
+ 1 == p2
)
11825 /* Check for ";attachment". If there is no attachment, the
11826 packet should end here. */
11829 *attachment
= p
+ 1;
11832 else if (*p
== '\0')
11838 /* Send a prepared I/O packet to the target and read its response.
11839 The prepared packet is in the global RS->BUF before this function
11840 is called, and the answer is there when we return.
11842 COMMAND_BYTES is the length of the request to send, which may include
11843 binary data. WHICH_PACKET is the packet configuration to check
11844 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11845 is set to the error number and -1 is returned. Otherwise the value
11846 returned by the function is returned.
11848 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11849 attachment is expected; an error will be reported if there's a
11850 mismatch. If one is found, *ATTACHMENT will be set to point into
11851 the packet buffer and *ATTACHMENT_LEN will be set to the
11852 attachment's length. */
11855 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
11856 int *remote_errno
, char **attachment
,
11857 int *attachment_len
)
11859 struct remote_state
*rs
= get_remote_state ();
11860 int ret
, bytes_read
;
11861 char *attachment_tmp
;
11863 if (packet_support (which_packet
) == PACKET_DISABLE
)
11865 *remote_errno
= FILEIO_ENOSYS
;
11869 putpkt_binary (rs
->buf
.data (), command_bytes
);
11870 bytes_read
= getpkt_sane (&rs
->buf
, 0);
11872 /* If it timed out, something is wrong. Don't try to parse the
11874 if (bytes_read
< 0)
11876 *remote_errno
= FILEIO_EINVAL
;
11880 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11883 *remote_errno
= FILEIO_EINVAL
;
11885 case PACKET_UNKNOWN
:
11886 *remote_errno
= FILEIO_ENOSYS
;
11892 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
11895 *remote_errno
= FILEIO_EINVAL
;
11899 /* Make sure we saw an attachment if and only if we expected one. */
11900 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11901 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11903 *remote_errno
= FILEIO_EINVAL
;
11907 /* If an attachment was found, it must point into the packet buffer;
11908 work out how many bytes there were. */
11909 if (attachment_tmp
!= NULL
)
11911 *attachment
= attachment_tmp
;
11912 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
11918 /* See declaration.h. */
11921 readahead_cache::invalidate ()
11926 /* See declaration.h. */
11929 readahead_cache::invalidate_fd (int fd
)
11931 if (this->fd
== fd
)
11935 /* Set the filesystem remote_hostio functions that take FILENAME
11936 arguments will use. Return 0 on success, or -1 if an error
11937 occurs (and set *REMOTE_ERRNO). */
11940 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
11943 struct remote_state
*rs
= get_remote_state ();
11944 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11945 char *p
= rs
->buf
.data ();
11946 int left
= get_remote_packet_size () - 1;
11950 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11953 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11956 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11958 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11959 remote_buffer_add_string (&p
, &left
, arg
);
11961 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
11962 remote_errno
, NULL
, NULL
);
11964 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11968 rs
->fs_pid
= required_pid
;
11973 /* Implementation of to_fileio_open. */
11976 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
11977 int flags
, int mode
, int warn_if_slow
,
11980 struct remote_state
*rs
= get_remote_state ();
11981 char *p
= rs
->buf
.data ();
11982 int left
= get_remote_packet_size () - 1;
11986 static int warning_issued
= 0;
11988 printf_unfiltered (_("Reading %s from remote target...\n"),
11991 if (!warning_issued
)
11993 warning (_("File transfers from remote targets can be slow."
11994 " Use \"set sysroot\" to access files locally"
11996 warning_issued
= 1;
12000 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12003 remote_buffer_add_string (&p
, &left
, "vFile:open:");
12005 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12006 strlen (filename
));
12007 remote_buffer_add_string (&p
, &left
, ",");
12009 remote_buffer_add_int (&p
, &left
, flags
);
12010 remote_buffer_add_string (&p
, &left
, ",");
12012 remote_buffer_add_int (&p
, &left
, mode
);
12014 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
12015 remote_errno
, NULL
, NULL
);
12019 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
12020 int flags
, int mode
, int warn_if_slow
,
12023 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
12027 /* Implementation of to_fileio_pwrite. */
12030 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12031 ULONGEST offset
, int *remote_errno
)
12033 struct remote_state
*rs
= get_remote_state ();
12034 char *p
= rs
->buf
.data ();
12035 int left
= get_remote_packet_size ();
12038 rs
->readahead_cache
.invalidate_fd (fd
);
12040 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
12042 remote_buffer_add_int (&p
, &left
, fd
);
12043 remote_buffer_add_string (&p
, &left
, ",");
12045 remote_buffer_add_int (&p
, &left
, offset
);
12046 remote_buffer_add_string (&p
, &left
, ",");
12048 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
12049 (get_remote_packet_size ()
12050 - (p
- rs
->buf
.data ())));
12052 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
12053 remote_errno
, NULL
, NULL
);
12057 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12058 ULONGEST offset
, int *remote_errno
)
12060 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12063 /* Helper for the implementation of to_fileio_pread. Read the file
12064 from the remote side with vFile:pread. */
12067 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12068 ULONGEST offset
, int *remote_errno
)
12070 struct remote_state
*rs
= get_remote_state ();
12071 char *p
= rs
->buf
.data ();
12073 int left
= get_remote_packet_size ();
12074 int ret
, attachment_len
;
12077 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12079 remote_buffer_add_int (&p
, &left
, fd
);
12080 remote_buffer_add_string (&p
, &left
, ",");
12082 remote_buffer_add_int (&p
, &left
, len
);
12083 remote_buffer_add_string (&p
, &left
, ",");
12085 remote_buffer_add_int (&p
, &left
, offset
);
12087 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
12088 remote_errno
, &attachment
,
12094 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12096 if (read_len
!= ret
)
12097 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12102 /* See declaration.h. */
12105 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12109 && this->offset
<= offset
12110 && offset
< this->offset
+ this->bufsize
)
12112 ULONGEST max
= this->offset
+ this->bufsize
;
12114 if (offset
+ len
> max
)
12115 len
= max
- offset
;
12117 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12124 /* Implementation of to_fileio_pread. */
12127 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12128 ULONGEST offset
, int *remote_errno
)
12131 struct remote_state
*rs
= get_remote_state ();
12132 readahead_cache
*cache
= &rs
->readahead_cache
;
12134 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12137 cache
->hit_count
++;
12140 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
12141 pulongest (cache
->hit_count
));
12145 cache
->miss_count
++;
12147 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
12148 pulongest (cache
->miss_count
));
12151 cache
->offset
= offset
;
12152 cache
->bufsize
= get_remote_packet_size ();
12153 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12155 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12156 cache
->offset
, remote_errno
);
12159 cache
->invalidate_fd (fd
);
12163 cache
->bufsize
= ret
;
12164 return cache
->pread (fd
, read_buf
, len
, offset
);
12168 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12169 ULONGEST offset
, int *remote_errno
)
12171 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12174 /* Implementation of to_fileio_close. */
12177 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12179 struct remote_state
*rs
= get_remote_state ();
12180 char *p
= rs
->buf
.data ();
12181 int left
= get_remote_packet_size () - 1;
12183 rs
->readahead_cache
.invalidate_fd (fd
);
12185 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12187 remote_buffer_add_int (&p
, &left
, fd
);
12189 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12190 remote_errno
, NULL
, NULL
);
12194 remote_target::fileio_close (int fd
, int *remote_errno
)
12196 return remote_hostio_close (fd
, remote_errno
);
12199 /* Implementation of to_fileio_unlink. */
12202 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12205 struct remote_state
*rs
= get_remote_state ();
12206 char *p
= rs
->buf
.data ();
12207 int left
= get_remote_packet_size () - 1;
12209 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12212 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12214 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12215 strlen (filename
));
12217 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12218 remote_errno
, NULL
, NULL
);
12222 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12225 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12228 /* Implementation of to_fileio_readlink. */
12230 gdb::optional
<std::string
>
12231 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12234 struct remote_state
*rs
= get_remote_state ();
12235 char *p
= rs
->buf
.data ();
12237 int left
= get_remote_packet_size ();
12238 int len
, attachment_len
;
12241 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12244 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12246 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12247 strlen (filename
));
12249 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12250 remote_errno
, &attachment
,
12256 std::string
ret (len
, '\0');
12258 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12259 (gdb_byte
*) &ret
[0], len
);
12260 if (read_len
!= len
)
12261 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12266 /* Implementation of to_fileio_fstat. */
12269 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12271 struct remote_state
*rs
= get_remote_state ();
12272 char *p
= rs
->buf
.data ();
12273 int left
= get_remote_packet_size ();
12274 int attachment_len
, ret
;
12276 struct fio_stat fst
;
12279 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12281 remote_buffer_add_int (&p
, &left
, fd
);
12283 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12284 remote_errno
, &attachment
,
12288 if (*remote_errno
!= FILEIO_ENOSYS
)
12291 /* Strictly we should return -1, ENOSYS here, but when
12292 "set sysroot remote:" was implemented in August 2008
12293 BFD's need for a stat function was sidestepped with
12294 this hack. This was not remedied until March 2015
12295 so we retain the previous behavior to avoid breaking
12298 Note that the memset is a March 2015 addition; older
12299 GDBs set st_size *and nothing else* so the structure
12300 would have garbage in all other fields. This might
12301 break something but retaining the previous behavior
12302 here would be just too wrong. */
12304 memset (st
, 0, sizeof (struct stat
));
12305 st
->st_size
= INT_MAX
;
12309 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12310 (gdb_byte
*) &fst
, sizeof (fst
));
12312 if (read_len
!= ret
)
12313 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12315 if (read_len
!= sizeof (fst
))
12316 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12317 read_len
, (int) sizeof (fst
));
12319 remote_fileio_to_host_stat (&fst
, st
);
12324 /* Implementation of to_filesystem_is_local. */
12327 remote_target::filesystem_is_local ()
12329 /* Valgrind GDB presents itself as a remote target but works
12330 on the local filesystem: it does not implement remote get
12331 and users are not expected to set a sysroot. To handle
12332 this case we treat the remote filesystem as local if the
12333 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12334 does not support vFile:open. */
12335 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12337 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12339 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12341 int fd
, remote_errno
;
12343 /* Try opening a file to probe support. The supplied
12344 filename is irrelevant, we only care about whether
12345 the stub recognizes the packet or not. */
12346 fd
= remote_hostio_open (NULL
, "just probing",
12347 FILEIO_O_RDONLY
, 0700, 0,
12351 remote_hostio_close (fd
, &remote_errno
);
12353 ps
= packet_support (PACKET_vFile_open
);
12356 if (ps
== PACKET_DISABLE
)
12358 static int warning_issued
= 0;
12360 if (!warning_issued
)
12362 warning (_("remote target does not support file"
12363 " transfer, attempting to access files"
12364 " from local filesystem."));
12365 warning_issued
= 1;
12376 remote_fileio_errno_to_host (int errnum
)
12382 case FILEIO_ENOENT
:
12390 case FILEIO_EACCES
:
12392 case FILEIO_EFAULT
:
12396 case FILEIO_EEXIST
:
12398 case FILEIO_ENODEV
:
12400 case FILEIO_ENOTDIR
:
12402 case FILEIO_EISDIR
:
12404 case FILEIO_EINVAL
:
12406 case FILEIO_ENFILE
:
12408 case FILEIO_EMFILE
:
12412 case FILEIO_ENOSPC
:
12414 case FILEIO_ESPIPE
:
12418 case FILEIO_ENOSYS
:
12420 case FILEIO_ENAMETOOLONG
:
12421 return ENAMETOOLONG
;
12427 remote_hostio_error (int errnum
)
12429 int host_error
= remote_fileio_errno_to_host (errnum
);
12431 if (host_error
== -1)
12432 error (_("Unknown remote I/O error %d"), errnum
);
12434 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12437 /* A RAII wrapper around a remote file descriptor. */
12439 class scoped_remote_fd
12442 scoped_remote_fd (remote_target
*remote
, int fd
)
12443 : m_remote (remote
), m_fd (fd
)
12447 ~scoped_remote_fd ()
12454 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12458 /* Swallow exception before it escapes the dtor. If
12459 something goes wrong, likely the connection is gone,
12460 and there's nothing else that can be done. */
12465 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12467 /* Release ownership of the file descriptor, and return it. */
12468 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12475 /* Return the owned file descriptor. */
12476 int get () const noexcept
12482 /* The remote target. */
12483 remote_target
*m_remote
;
12485 /* The owned remote I/O file descriptor. */
12490 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12492 remote_target
*remote
= get_current_remote_target ();
12494 if (remote
== nullptr)
12495 error (_("command can only be used with remote target"));
12497 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12501 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12504 int retcode
, remote_errno
, bytes
, io_size
;
12505 int bytes_in_buffer
;
12509 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12511 perror_with_name (local_file
);
12513 scoped_remote_fd fd
12514 (this, remote_hostio_open (NULL
,
12515 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12517 0700, 0, &remote_errno
));
12518 if (fd
.get () == -1)
12519 remote_hostio_error (remote_errno
);
12521 /* Send up to this many bytes at once. They won't all fit in the
12522 remote packet limit, so we'll transfer slightly fewer. */
12523 io_size
= get_remote_packet_size ();
12524 gdb::byte_vector
buffer (io_size
);
12526 bytes_in_buffer
= 0;
12529 while (bytes_in_buffer
|| !saw_eof
)
12533 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12534 io_size
- bytes_in_buffer
,
12538 if (ferror (file
.get ()))
12539 error (_("Error reading %s."), local_file
);
12542 /* EOF. Unless there is something still in the
12543 buffer from the last iteration, we are done. */
12545 if (bytes_in_buffer
== 0)
12553 bytes
+= bytes_in_buffer
;
12554 bytes_in_buffer
= 0;
12556 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12557 offset
, &remote_errno
);
12560 remote_hostio_error (remote_errno
);
12561 else if (retcode
== 0)
12562 error (_("Remote write of %d bytes returned 0!"), bytes
);
12563 else if (retcode
< bytes
)
12565 /* Short write. Save the rest of the read data for the next
12567 bytes_in_buffer
= bytes
- retcode
;
12568 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12574 if (remote_hostio_close (fd
.release (), &remote_errno
))
12575 remote_hostio_error (remote_errno
);
12578 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12582 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12584 remote_target
*remote
= get_current_remote_target ();
12586 if (remote
== nullptr)
12587 error (_("command can only be used with remote target"));
12589 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12593 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12596 int remote_errno
, bytes
, io_size
;
12599 scoped_remote_fd fd
12600 (this, remote_hostio_open (NULL
,
12601 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12603 if (fd
.get () == -1)
12604 remote_hostio_error (remote_errno
);
12606 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12608 perror_with_name (local_file
);
12610 /* Send up to this many bytes at once. They won't all fit in the
12611 remote packet limit, so we'll transfer slightly fewer. */
12612 io_size
= get_remote_packet_size ();
12613 gdb::byte_vector
buffer (io_size
);
12618 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12621 /* Success, but no bytes, means end-of-file. */
12624 remote_hostio_error (remote_errno
);
12628 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12630 perror_with_name (local_file
);
12633 if (remote_hostio_close (fd
.release (), &remote_errno
))
12634 remote_hostio_error (remote_errno
);
12637 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12641 remote_file_delete (const char *remote_file
, int from_tty
)
12643 remote_target
*remote
= get_current_remote_target ();
12645 if (remote
== nullptr)
12646 error (_("command can only be used with remote target"));
12648 remote
->remote_file_delete (remote_file
, from_tty
);
12652 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12654 int retcode
, remote_errno
;
12656 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12658 remote_hostio_error (remote_errno
);
12661 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12665 remote_put_command (const char *args
, int from_tty
)
12668 error_no_arg (_("file to put"));
12670 gdb_argv
argv (args
);
12671 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12672 error (_("Invalid parameters to remote put"));
12674 remote_file_put (argv
[0], argv
[1], from_tty
);
12678 remote_get_command (const char *args
, int from_tty
)
12681 error_no_arg (_("file to get"));
12683 gdb_argv
argv (args
);
12684 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12685 error (_("Invalid parameters to remote get"));
12687 remote_file_get (argv
[0], argv
[1], from_tty
);
12691 remote_delete_command (const char *args
, int from_tty
)
12694 error_no_arg (_("file to delete"));
12696 gdb_argv
argv (args
);
12697 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12698 error (_("Invalid parameters to remote delete"));
12700 remote_file_delete (argv
[0], from_tty
);
12704 remote_target::can_execute_reverse ()
12706 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12707 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12714 remote_target::supports_non_stop ()
12720 remote_target::supports_disable_randomization ()
12722 /* Only supported in extended mode. */
12727 remote_target::supports_multi_process ()
12729 struct remote_state
*rs
= get_remote_state ();
12731 return remote_multi_process_p (rs
);
12735 remote_supports_cond_tracepoints ()
12737 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12741 remote_target::supports_evaluation_of_breakpoint_conditions ()
12743 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12747 remote_supports_fast_tracepoints ()
12749 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12753 remote_supports_static_tracepoints ()
12755 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12759 remote_supports_install_in_trace ()
12761 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12765 remote_target::supports_enable_disable_tracepoint ()
12767 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12772 remote_target::supports_string_tracing ()
12774 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12778 remote_target::can_run_breakpoint_commands ()
12780 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12784 remote_target::trace_init ()
12786 struct remote_state
*rs
= get_remote_state ();
12789 remote_get_noisy_reply ();
12790 if (strcmp (rs
->buf
.data (), "OK") != 0)
12791 error (_("Target does not support this command."));
12794 /* Recursive routine to walk through command list including loops, and
12795 download packets for each command. */
12798 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
12799 struct command_line
*cmds
)
12801 struct remote_state
*rs
= get_remote_state ();
12802 struct command_line
*cmd
;
12804 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12806 QUIT
; /* Allow user to bail out with ^C. */
12807 strcpy (rs
->buf
.data (), "QTDPsrc:");
12808 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12809 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12810 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12812 remote_get_noisy_reply ();
12813 if (strcmp (rs
->buf
.data (), "OK"))
12814 warning (_("Target does not support source download."));
12816 if (cmd
->control_type
== while_control
12817 || cmd
->control_type
== while_stepping_control
)
12819 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
12821 QUIT
; /* Allow user to bail out with ^C. */
12822 strcpy (rs
->buf
.data (), "QTDPsrc:");
12823 encode_source_string (num
, addr
, "cmd", "end",
12824 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12825 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12827 remote_get_noisy_reply ();
12828 if (strcmp (rs
->buf
.data (), "OK"))
12829 warning (_("Target does not support source download."));
12835 remote_target::download_tracepoint (struct bp_location
*loc
)
12839 std::vector
<std::string
> tdp_actions
;
12840 std::vector
<std::string
> stepping_actions
;
12842 struct breakpoint
*b
= loc
->owner
;
12843 struct tracepoint
*t
= (struct tracepoint
*) b
;
12844 struct remote_state
*rs
= get_remote_state ();
12846 const char *err_msg
= _("Tracepoint packet too large for target.");
12849 /* We use a buffer other than rs->buf because we'll build strings
12850 across multiple statements, and other statements in between could
12852 gdb::char_vector
buf (get_remote_packet_size ());
12854 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12856 tpaddr
= loc
->address
;
12857 strcpy (addrbuf
, phex (tpaddr
, sizeof (CORE_ADDR
)));
12858 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
12859 b
->number
, addrbuf
, /* address */
12860 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12861 t
->step_count
, t
->pass_count
);
12863 if (ret
< 0 || ret
>= buf
.size ())
12864 error ("%s", err_msg
);
12866 /* Fast tracepoints are mostly handled by the target, but we can
12867 tell the target how big of an instruction block should be moved
12869 if (b
->type
== bp_fast_tracepoint
)
12871 /* Only test for support at download time; we may not know
12872 target capabilities at definition time. */
12873 if (remote_supports_fast_tracepoints ())
12875 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12878 size_left
= buf
.size () - strlen (buf
.data ());
12879 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12881 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12883 if (ret
< 0 || ret
>= size_left
)
12884 error ("%s", err_msg
);
12887 /* If it passed validation at definition but fails now,
12888 something is very wrong. */
12889 internal_error (__FILE__
, __LINE__
,
12890 _("Fast tracepoint not "
12891 "valid during download"));
12894 /* Fast tracepoints are functionally identical to regular
12895 tracepoints, so don't take lack of support as a reason to
12896 give up on the trace run. */
12897 warning (_("Target does not support fast tracepoints, "
12898 "downloading %d as regular tracepoint"), b
->number
);
12900 else if (b
->type
== bp_static_tracepoint
)
12902 /* Only test for support at download time; we may not know
12903 target capabilities at definition time. */
12904 if (remote_supports_static_tracepoints ())
12906 struct static_tracepoint_marker marker
;
12908 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12910 size_left
= buf
.size () - strlen (buf
.data ());
12911 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12914 if (ret
< 0 || ret
>= size_left
)
12915 error ("%s", err_msg
);
12918 error (_("Static tracepoint not valid during download"));
12921 /* Fast tracepoints are functionally identical to regular
12922 tracepoints, so don't take lack of support as a reason
12923 to give up on the trace run. */
12924 error (_("Target does not support static tracepoints"));
12926 /* If the tracepoint has a conditional, make it into an agent
12927 expression and append to the definition. */
12930 /* Only test support at download time, we may not know target
12931 capabilities at definition time. */
12932 if (remote_supports_cond_tracepoints ())
12934 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
12937 size_left
= buf
.size () - strlen (buf
.data ());
12939 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12940 size_left
, ":X%x,", aexpr
->len
);
12942 if (ret
< 0 || ret
>= size_left
)
12943 error ("%s", err_msg
);
12945 size_left
= buf
.size () - strlen (buf
.data ());
12947 /* Two bytes to encode each aexpr byte, plus the terminating
12949 if (aexpr
->len
* 2 + 1 > size_left
)
12950 error ("%s", err_msg
);
12952 pkt
= buf
.data () + strlen (buf
.data ());
12954 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12955 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12959 warning (_("Target does not support conditional tracepoints, "
12960 "ignoring tp %d cond"), b
->number
);
12963 if (b
->commands
|| *default_collect
)
12965 size_left
= buf
.size () - strlen (buf
.data ());
12967 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12970 if (ret
< 0 || ret
>= size_left
)
12971 error ("%s", err_msg
);
12974 putpkt (buf
.data ());
12975 remote_get_noisy_reply ();
12976 if (strcmp (rs
->buf
.data (), "OK"))
12977 error (_("Target does not support tracepoints."));
12979 /* do_single_steps (t); */
12980 for (auto action_it
= tdp_actions
.begin ();
12981 action_it
!= tdp_actions
.end (); action_it
++)
12983 QUIT
; /* Allow user to bail out with ^C. */
12985 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
12986 || !stepping_actions
.empty ());
12988 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
12989 b
->number
, addrbuf
, /* address */
12990 action_it
->c_str (),
12991 has_more
? '-' : 0);
12993 if (ret
< 0 || ret
>= buf
.size ())
12994 error ("%s", err_msg
);
12996 putpkt (buf
.data ());
12997 remote_get_noisy_reply ();
12998 if (strcmp (rs
->buf
.data (), "OK"))
12999 error (_("Error on target while setting tracepoints."));
13002 for (auto action_it
= stepping_actions
.begin ();
13003 action_it
!= stepping_actions
.end (); action_it
++)
13005 QUIT
; /* Allow user to bail out with ^C. */
13007 bool is_first
= action_it
== stepping_actions
.begin ();
13008 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
13010 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
13011 b
->number
, addrbuf
, /* address */
13012 is_first
? "S" : "",
13013 action_it
->c_str (),
13014 has_more
? "-" : "");
13016 if (ret
< 0 || ret
>= buf
.size ())
13017 error ("%s", err_msg
);
13019 putpkt (buf
.data ());
13020 remote_get_noisy_reply ();
13021 if (strcmp (rs
->buf
.data (), "OK"))
13022 error (_("Error on target while setting tracepoints."));
13025 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
13027 if (b
->location
!= NULL
)
13029 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13031 if (ret
< 0 || ret
>= buf
.size ())
13032 error ("%s", err_msg
);
13034 encode_source_string (b
->number
, loc
->address
, "at",
13035 event_location_to_string (b
->location
.get ()),
13036 buf
.data () + strlen (buf
.data ()),
13037 buf
.size () - strlen (buf
.data ()));
13038 putpkt (buf
.data ());
13039 remote_get_noisy_reply ();
13040 if (strcmp (rs
->buf
.data (), "OK"))
13041 warning (_("Target does not support source download."));
13043 if (b
->cond_string
)
13045 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13047 if (ret
< 0 || ret
>= buf
.size ())
13048 error ("%s", err_msg
);
13050 encode_source_string (b
->number
, loc
->address
,
13051 "cond", b
->cond_string
,
13052 buf
.data () + strlen (buf
.data ()),
13053 buf
.size () - strlen (buf
.data ()));
13054 putpkt (buf
.data ());
13055 remote_get_noisy_reply ();
13056 if (strcmp (rs
->buf
.data (), "OK"))
13057 warning (_("Target does not support source download."));
13059 remote_download_command_source (b
->number
, loc
->address
,
13060 breakpoint_commands (b
));
13065 remote_target::can_download_tracepoint ()
13067 struct remote_state
*rs
= get_remote_state ();
13068 struct trace_status
*ts
;
13071 /* Don't try to install tracepoints until we've relocated our
13072 symbols, and fetched and merged the target's tracepoint list with
13074 if (rs
->starting_up
)
13077 ts
= current_trace_status ();
13078 status
= get_trace_status (ts
);
13080 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13083 /* If we are in a tracing experiment, but remote stub doesn't support
13084 installing tracepoint in trace, we have to return. */
13085 if (!remote_supports_install_in_trace ())
13093 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13095 struct remote_state
*rs
= get_remote_state ();
13098 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13099 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13101 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13102 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13103 >= get_remote_packet_size ())
13104 error (_("Trace state variable name too long for tsv definition packet"));
13105 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13108 remote_get_noisy_reply ();
13109 if (rs
->buf
[0] == '\0')
13110 error (_("Target does not support this command."));
13111 if (strcmp (rs
->buf
.data (), "OK") != 0)
13112 error (_("Error on target while downloading trace state variable."));
13116 remote_target::enable_tracepoint (struct bp_location
*location
)
13118 struct remote_state
*rs
= get_remote_state ();
13120 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13121 location
->owner
->number
,
13122 phex (location
->address
, sizeof (CORE_ADDR
)));
13124 remote_get_noisy_reply ();
13125 if (rs
->buf
[0] == '\0')
13126 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13127 if (strcmp (rs
->buf
.data (), "OK") != 0)
13128 error (_("Error on target while enabling tracepoint."));
13132 remote_target::disable_tracepoint (struct bp_location
*location
)
13134 struct remote_state
*rs
= get_remote_state ();
13136 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13137 location
->owner
->number
,
13138 phex (location
->address
, sizeof (CORE_ADDR
)));
13140 remote_get_noisy_reply ();
13141 if (rs
->buf
[0] == '\0')
13142 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13143 if (strcmp (rs
->buf
.data (), "OK") != 0)
13144 error (_("Error on target while disabling tracepoint."));
13148 remote_target::trace_set_readonly_regions ()
13151 bfd_size_type size
;
13157 return; /* No information to give. */
13159 struct remote_state
*rs
= get_remote_state ();
13161 strcpy (rs
->buf
.data (), "QTro");
13162 offset
= strlen (rs
->buf
.data ());
13163 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
13165 char tmp1
[40], tmp2
[40];
13168 if ((s
->flags
& SEC_LOAD
) == 0 ||
13169 /* (s->flags & SEC_CODE) == 0 || */
13170 (s
->flags
& SEC_READONLY
) == 0)
13174 vma
= bfd_section_vma (s
);
13175 size
= bfd_section_size (s
);
13176 sprintf_vma (tmp1
, vma
);
13177 sprintf_vma (tmp2
, vma
+ size
);
13178 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13179 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13181 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13183 Too many sections for read-only sections definition packet."));
13186 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13188 offset
+= sec_length
;
13193 getpkt (&rs
->buf
, 0);
13198 remote_target::trace_start ()
13200 struct remote_state
*rs
= get_remote_state ();
13202 putpkt ("QTStart");
13203 remote_get_noisy_reply ();
13204 if (rs
->buf
[0] == '\0')
13205 error (_("Target does not support this command."));
13206 if (strcmp (rs
->buf
.data (), "OK") != 0)
13207 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13211 remote_target::get_trace_status (struct trace_status
*ts
)
13213 /* Initialize it just to avoid a GCC false warning. */
13215 enum packet_result result
;
13216 struct remote_state
*rs
= get_remote_state ();
13218 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13221 /* FIXME we need to get register block size some other way. */
13222 trace_regblock_size
13223 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13225 putpkt ("qTStatus");
13229 p
= remote_get_noisy_reply ();
13231 catch (const gdb_exception_error
&ex
)
13233 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13235 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13241 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13243 /* If the remote target doesn't do tracing, flag it. */
13244 if (result
== PACKET_UNKNOWN
)
13247 /* We're working with a live target. */
13248 ts
->filename
= NULL
;
13251 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13253 /* Function 'parse_trace_status' sets default value of each field of
13254 'ts' at first, so we don't have to do it here. */
13255 parse_trace_status (p
, ts
);
13257 return ts
->running
;
13261 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13262 struct uploaded_tp
*utp
)
13264 struct remote_state
*rs
= get_remote_state ();
13266 struct bp_location
*loc
;
13267 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13268 size_t size
= get_remote_packet_size ();
13273 tp
->traceframe_usage
= 0;
13274 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
13276 /* If the tracepoint was never downloaded, don't go asking for
13278 if (tp
->number_on_target
== 0)
13280 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13281 phex_nz (loc
->address
, 0));
13283 reply
= remote_get_noisy_reply ();
13284 if (reply
&& *reply
)
13287 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13293 utp
->hit_count
= 0;
13294 utp
->traceframe_usage
= 0;
13295 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13296 phex_nz (utp
->addr
, 0));
13298 reply
= remote_get_noisy_reply ();
13299 if (reply
&& *reply
)
13302 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13308 remote_target::trace_stop ()
13310 struct remote_state
*rs
= get_remote_state ();
13313 remote_get_noisy_reply ();
13314 if (rs
->buf
[0] == '\0')
13315 error (_("Target does not support this command."));
13316 if (strcmp (rs
->buf
.data (), "OK") != 0)
13317 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13321 remote_target::trace_find (enum trace_find_type type
, int num
,
13322 CORE_ADDR addr1
, CORE_ADDR addr2
,
13325 struct remote_state
*rs
= get_remote_state ();
13326 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13328 int target_frameno
= -1, target_tracept
= -1;
13330 /* Lookups other than by absolute frame number depend on the current
13331 trace selected, so make sure it is correct on the remote end
13333 if (type
!= tfind_number
)
13334 set_remote_traceframe ();
13336 p
= rs
->buf
.data ();
13337 strcpy (p
, "QTFrame:");
13338 p
= strchr (p
, '\0');
13342 xsnprintf (p
, endbuf
- p
, "%x", num
);
13345 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13348 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13351 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13352 phex_nz (addr2
, 0));
13354 case tfind_outside
:
13355 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13356 phex_nz (addr2
, 0));
13359 error (_("Unknown trace find type %d"), type
);
13363 reply
= remote_get_noisy_reply ();
13364 if (*reply
== '\0')
13365 error (_("Target does not support this command."));
13367 while (reply
&& *reply
)
13372 target_frameno
= (int) strtol (p
, &reply
, 16);
13374 error (_("Unable to parse trace frame number"));
13375 /* Don't update our remote traceframe number cache on failure
13376 to select a remote traceframe. */
13377 if (target_frameno
== -1)
13382 target_tracept
= (int) strtol (p
, &reply
, 16);
13384 error (_("Unable to parse tracepoint number"));
13386 case 'O': /* "OK"? */
13387 if (reply
[1] == 'K' && reply
[2] == '\0')
13390 error (_("Bogus reply from target: %s"), reply
);
13393 error (_("Bogus reply from target: %s"), reply
);
13396 *tpp
= target_tracept
;
13398 rs
->remote_traceframe_number
= target_frameno
;
13399 return target_frameno
;
13403 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13405 struct remote_state
*rs
= get_remote_state ();
13409 set_remote_traceframe ();
13411 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13413 reply
= remote_get_noisy_reply ();
13414 if (reply
&& *reply
)
13418 unpack_varlen_hex (reply
+ 1, &uval
);
13419 *val
= (LONGEST
) uval
;
13427 remote_target::save_trace_data (const char *filename
)
13429 struct remote_state
*rs
= get_remote_state ();
13432 p
= rs
->buf
.data ();
13433 strcpy (p
, "QTSave:");
13435 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13436 >= get_remote_packet_size ())
13437 error (_("Remote file name too long for trace save packet"));
13438 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13441 reply
= remote_get_noisy_reply ();
13442 if (*reply
== '\0')
13443 error (_("Target does not support this command."));
13444 if (strcmp (reply
, "OK") != 0)
13445 error (_("Bogus reply from target: %s"), reply
);
13449 /* This is basically a memory transfer, but needs to be its own packet
13450 because we don't know how the target actually organizes its trace
13451 memory, plus we want to be able to ask for as much as possible, but
13452 not be unhappy if we don't get as much as we ask for. */
13455 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13457 struct remote_state
*rs
= get_remote_state ();
13462 p
= rs
->buf
.data ();
13463 strcpy (p
, "qTBuffer:");
13465 p
+= hexnumstr (p
, offset
);
13467 p
+= hexnumstr (p
, len
);
13471 reply
= remote_get_noisy_reply ();
13472 if (reply
&& *reply
)
13474 /* 'l' by itself means we're at the end of the buffer and
13475 there is nothing more to get. */
13479 /* Convert the reply into binary. Limit the number of bytes to
13480 convert according to our passed-in buffer size, rather than
13481 what was returned in the packet; if the target is
13482 unexpectedly generous and gives us a bigger reply than we
13483 asked for, we don't want to crash. */
13484 rslt
= hex2bin (reply
, buf
, len
);
13488 /* Something went wrong, flag as an error. */
13493 remote_target::set_disconnected_tracing (int val
)
13495 struct remote_state
*rs
= get_remote_state ();
13497 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13501 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13502 "QTDisconnected:%x", val
);
13504 reply
= remote_get_noisy_reply ();
13505 if (*reply
== '\0')
13506 error (_("Target does not support this command."));
13507 if (strcmp (reply
, "OK") != 0)
13508 error (_("Bogus reply from target: %s"), reply
);
13511 warning (_("Target does not support disconnected tracing."));
13515 remote_target::core_of_thread (ptid_t ptid
)
13517 thread_info
*info
= find_thread_ptid (this, ptid
);
13519 if (info
!= NULL
&& info
->priv
!= NULL
)
13520 return get_remote_thread_info (info
)->core
;
13526 remote_target::set_circular_trace_buffer (int val
)
13528 struct remote_state
*rs
= get_remote_state ();
13531 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13532 "QTBuffer:circular:%x", val
);
13534 reply
= remote_get_noisy_reply ();
13535 if (*reply
== '\0')
13536 error (_("Target does not support this command."));
13537 if (strcmp (reply
, "OK") != 0)
13538 error (_("Bogus reply from target: %s"), reply
);
13542 remote_target::traceframe_info ()
13544 gdb::optional
<gdb::char_vector
> text
13545 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO
,
13548 return parse_traceframe_info (text
->data ());
13553 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13554 instruction on which a fast tracepoint may be placed. Returns -1
13555 if the packet is not supported, and 0 if the minimum instruction
13556 length is unknown. */
13559 remote_target::get_min_fast_tracepoint_insn_len ()
13561 struct remote_state
*rs
= get_remote_state ();
13564 /* If we're not debugging a process yet, the IPA can't be
13566 if (!target_has_execution
)
13569 /* Make sure the remote is pointing at the right process. */
13570 set_general_process ();
13572 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13574 reply
= remote_get_noisy_reply ();
13575 if (*reply
== '\0')
13579 ULONGEST min_insn_len
;
13581 unpack_varlen_hex (reply
, &min_insn_len
);
13583 return (int) min_insn_len
;
13588 remote_target::set_trace_buffer_size (LONGEST val
)
13590 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13592 struct remote_state
*rs
= get_remote_state ();
13593 char *buf
= rs
->buf
.data ();
13594 char *endbuf
= buf
+ get_remote_packet_size ();
13595 enum packet_result result
;
13597 gdb_assert (val
>= 0 || val
== -1);
13598 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13599 /* Send -1 as literal "-1" to avoid host size dependency. */
13603 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13606 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13609 remote_get_noisy_reply ();
13610 result
= packet_ok (rs
->buf
,
13611 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13613 if (result
!= PACKET_OK
)
13614 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13619 remote_target::set_trace_notes (const char *user
, const char *notes
,
13620 const char *stop_notes
)
13622 struct remote_state
*rs
= get_remote_state ();
13624 char *buf
= rs
->buf
.data ();
13625 char *endbuf
= buf
+ get_remote_packet_size ();
13628 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13631 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13632 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13638 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13639 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13645 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13646 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13650 /* Ensure the buffer is terminated. */
13654 reply
= remote_get_noisy_reply ();
13655 if (*reply
== '\0')
13658 if (strcmp (reply
, "OK") != 0)
13659 error (_("Bogus reply from target: %s"), reply
);
13665 remote_target::use_agent (bool use
)
13667 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13669 struct remote_state
*rs
= get_remote_state ();
13671 /* If the stub supports QAgent. */
13672 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13674 getpkt (&rs
->buf
, 0);
13676 if (strcmp (rs
->buf
.data (), "OK") == 0)
13687 remote_target::can_use_agent ()
13689 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13692 struct btrace_target_info
13694 /* The ptid of the traced thread. */
13697 /* The obtained branch trace configuration. */
13698 struct btrace_config conf
;
13701 /* Reset our idea of our target's btrace configuration. */
13704 remote_btrace_reset (remote_state
*rs
)
13706 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13709 /* Synchronize the configuration with the target. */
13712 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13714 struct packet_config
*packet
;
13715 struct remote_state
*rs
;
13716 char *buf
, *pos
, *endbuf
;
13718 rs
= get_remote_state ();
13719 buf
= rs
->buf
.data ();
13720 endbuf
= buf
+ get_remote_packet_size ();
13722 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13723 if (packet_config_support (packet
) == PACKET_ENABLE
13724 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13727 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13731 getpkt (&rs
->buf
, 0);
13733 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13735 if (buf
[0] == 'E' && buf
[1] == '.')
13736 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13738 error (_("Failed to configure the BTS buffer size."));
13741 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13744 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13745 if (packet_config_support (packet
) == PACKET_ENABLE
13746 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13749 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13753 getpkt (&rs
->buf
, 0);
13755 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13757 if (buf
[0] == 'E' && buf
[1] == '.')
13758 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13760 error (_("Failed to configure the trace buffer size."));
13763 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13767 /* Read the current thread's btrace configuration from the target and
13768 store it into CONF. */
13771 btrace_read_config (struct btrace_config
*conf
)
13773 gdb::optional
<gdb::char_vector
> xml
13774 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF
, "");
13776 parse_xml_btrace_conf (conf
, xml
->data ());
13779 /* Maybe reopen target btrace. */
13782 remote_target::remote_btrace_maybe_reopen ()
13784 struct remote_state
*rs
= get_remote_state ();
13785 int btrace_target_pushed
= 0;
13786 #if !defined (HAVE_LIBIPT)
13790 /* Don't bother walking the entirety of the remote thread list when
13791 we know the feature isn't supported by the remote. */
13792 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
13795 scoped_restore_current_thread restore_thread
;
13797 for (thread_info
*tp
: all_non_exited_threads (this))
13799 set_general_thread (tp
->ptid
);
13801 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13802 btrace_read_config (&rs
->btrace_config
);
13804 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13807 #if !defined (HAVE_LIBIPT)
13808 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13813 warning (_("Target is recording using Intel Processor Trace "
13814 "but support was disabled at compile time."));
13819 #endif /* !defined (HAVE_LIBIPT) */
13821 /* Push target, once, but before anything else happens. This way our
13822 changes to the threads will be cleaned up by unpushing the target
13823 in case btrace_read_config () throws. */
13824 if (!btrace_target_pushed
)
13826 btrace_target_pushed
= 1;
13827 record_btrace_push_target ();
13828 printf_filtered (_("Target is recording using %s.\n"),
13829 btrace_format_string (rs
->btrace_config
.format
));
13832 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13833 tp
->btrace
.target
->ptid
= tp
->ptid
;
13834 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13838 /* Enable branch tracing. */
13840 struct btrace_target_info
*
13841 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
13843 struct btrace_target_info
*tinfo
= NULL
;
13844 struct packet_config
*packet
= NULL
;
13845 struct remote_state
*rs
= get_remote_state ();
13846 char *buf
= rs
->buf
.data ();
13847 char *endbuf
= buf
+ get_remote_packet_size ();
13849 switch (conf
->format
)
13851 case BTRACE_FORMAT_BTS
:
13852 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13855 case BTRACE_FORMAT_PT
:
13856 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13860 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13861 error (_("Target does not support branch tracing."));
13863 btrace_sync_conf (conf
);
13865 set_general_thread (ptid
);
13867 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13869 getpkt (&rs
->buf
, 0);
13871 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13873 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13874 error (_("Could not enable branch tracing for %s: %s"),
13875 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
13877 error (_("Could not enable branch tracing for %s."),
13878 target_pid_to_str (ptid
).c_str ());
13881 tinfo
= XCNEW (struct btrace_target_info
);
13882 tinfo
->ptid
= ptid
;
13884 /* If we fail to read the configuration, we lose some information, but the
13885 tracing itself is not impacted. */
13888 btrace_read_config (&tinfo
->conf
);
13890 catch (const gdb_exception_error
&err
)
13892 if (err
.message
!= NULL
)
13893 warning ("%s", err
.what ());
13899 /* Disable branch tracing. */
13902 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
13904 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13905 struct remote_state
*rs
= get_remote_state ();
13906 char *buf
= rs
->buf
.data ();
13907 char *endbuf
= buf
+ get_remote_packet_size ();
13909 if (packet_config_support (packet
) != PACKET_ENABLE
)
13910 error (_("Target does not support branch tracing."));
13912 set_general_thread (tinfo
->ptid
);
13914 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13916 getpkt (&rs
->buf
, 0);
13918 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13920 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13921 error (_("Could not disable branch tracing for %s: %s"),
13922 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
13924 error (_("Could not disable branch tracing for %s."),
13925 target_pid_to_str (tinfo
->ptid
).c_str ());
13931 /* Teardown branch tracing. */
13934 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
13936 /* We must not talk to the target during teardown. */
13940 /* Read the branch trace. */
13943 remote_target::read_btrace (struct btrace_data
*btrace
,
13944 struct btrace_target_info
*tinfo
,
13945 enum btrace_read_type type
)
13947 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13950 if (packet_config_support (packet
) != PACKET_ENABLE
)
13951 error (_("Target does not support branch tracing."));
13953 #if !defined(HAVE_LIBEXPAT)
13954 error (_("Cannot process branch tracing result. XML parsing not supported."));
13959 case BTRACE_READ_ALL
:
13962 case BTRACE_READ_NEW
:
13965 case BTRACE_READ_DELTA
:
13969 internal_error (__FILE__
, __LINE__
,
13970 _("Bad branch tracing read type: %u."),
13971 (unsigned int) type
);
13974 gdb::optional
<gdb::char_vector
> xml
13975 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE
, annex
);
13977 return BTRACE_ERR_UNKNOWN
;
13979 parse_xml_btrace (btrace
, xml
->data ());
13981 return BTRACE_ERR_NONE
;
13984 const struct btrace_config
*
13985 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
13987 return &tinfo
->conf
;
13991 remote_target::augmented_libraries_svr4_read ()
13993 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13997 /* Implementation of to_load. */
14000 remote_target::load (const char *name
, int from_tty
)
14002 generic_load (name
, from_tty
);
14005 /* Accepts an integer PID; returns a string representing a file that
14006 can be opened on the remote side to get the symbols for the child
14007 process. Returns NULL if the operation is not supported. */
14010 remote_target::pid_to_exec_file (int pid
)
14012 static gdb::optional
<gdb::char_vector
> filename
;
14013 char *annex
= NULL
;
14015 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
14018 inferior
*inf
= find_inferior_pid (this, pid
);
14020 internal_error (__FILE__
, __LINE__
,
14021 _("not currently attached to process %d"), pid
);
14023 if (!inf
->fake_pid_p
)
14025 const int annex_size
= 9;
14027 annex
= (char *) alloca (annex_size
);
14028 xsnprintf (annex
, annex_size
, "%x", pid
);
14031 filename
= target_read_stralloc (current_top_target (),
14032 TARGET_OBJECT_EXEC_FILE
, annex
);
14034 return filename
? filename
->data () : nullptr;
14037 /* Implement the to_can_do_single_step target_ops method. */
14040 remote_target::can_do_single_step ()
14042 /* We can only tell whether target supports single step or not by
14043 supported s and S vCont actions if the stub supports vContSupported
14044 feature. If the stub doesn't support vContSupported feature,
14045 we have conservatively to think target doesn't supports single
14047 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
14049 struct remote_state
*rs
= get_remote_state ();
14051 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14052 remote_vcont_probe ();
14054 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14060 /* Implementation of the to_execution_direction method for the remote
14063 enum exec_direction_kind
14064 remote_target::execution_direction ()
14066 struct remote_state
*rs
= get_remote_state ();
14068 return rs
->last_resume_exec_dir
;
14071 /* Return pointer to the thread_info struct which corresponds to
14072 THREAD_HANDLE (having length HANDLE_LEN). */
14075 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14079 for (thread_info
*tp
: all_non_exited_threads (this))
14081 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14083 if (tp
->inf
== inf
&& priv
!= NULL
)
14085 if (handle_len
!= priv
->thread_handle
.size ())
14086 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14087 handle_len
, priv
->thread_handle
.size ());
14088 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14098 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14100 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14101 return priv
->thread_handle
;
14105 remote_target::can_async_p ()
14107 struct remote_state
*rs
= get_remote_state ();
14109 /* We don't go async if the user has explicitly prevented it with the
14110 "maint set target-async" command. */
14111 if (!target_async_permitted
)
14114 /* We're async whenever the serial device is. */
14115 return serial_can_async_p (rs
->remote_desc
);
14119 remote_target::is_async_p ()
14121 struct remote_state
*rs
= get_remote_state ();
14123 if (!target_async_permitted
)
14124 /* We only enable async when the user specifically asks for it. */
14127 /* We're async whenever the serial device is. */
14128 return serial_is_async_p (rs
->remote_desc
);
14131 /* Pass the SERIAL event on and up to the client. One day this code
14132 will be able to delay notifying the client of an event until the
14133 point where an entire packet has been received. */
14135 static serial_event_ftype remote_async_serial_handler
;
14138 remote_async_serial_handler (struct serial
*scb
, void *context
)
14140 /* Don't propogate error information up to the client. Instead let
14141 the client find out about the error by querying the target. */
14142 inferior_event_handler (INF_REG_EVENT
, NULL
);
14146 remote_async_inferior_event_handler (gdb_client_data data
)
14148 inferior_event_handler (INF_REG_EVENT
, data
);
14152 remote_target::async_wait_fd ()
14154 struct remote_state
*rs
= get_remote_state ();
14155 return rs
->remote_desc
->fd
;
14159 remote_target::async (int enable
)
14161 struct remote_state
*rs
= get_remote_state ();
14165 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14167 /* If there are pending events in the stop reply queue tell the
14168 event loop to process them. */
14169 if (!rs
->stop_reply_queue
.empty ())
14170 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14171 /* For simplicity, below we clear the pending events token
14172 without remembering whether it is marked, so here we always
14173 mark it. If there's actually no pending notification to
14174 process, this ends up being a no-op (other than a spurious
14175 event-loop wakeup). */
14176 if (target_is_non_stop_p ())
14177 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14181 serial_async (rs
->remote_desc
, NULL
, NULL
);
14182 /* If the core is disabling async, it doesn't want to be
14183 disturbed with target events. Clear all async event sources
14185 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14186 if (target_is_non_stop_p ())
14187 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14191 /* Implementation of the to_thread_events method. */
14194 remote_target::thread_events (int enable
)
14196 struct remote_state
*rs
= get_remote_state ();
14197 size_t size
= get_remote_packet_size ();
14199 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14202 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14204 getpkt (&rs
->buf
, 0);
14206 switch (packet_ok (rs
->buf
,
14207 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14210 if (strcmp (rs
->buf
.data (), "OK") != 0)
14211 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14214 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14216 case PACKET_UNKNOWN
:
14222 show_remote_cmd (const char *args
, int from_tty
)
14224 /* We can't just use cmd_show_list here, because we want to skip
14225 the redundant "show remote Z-packet" and the legacy aliases. */
14226 struct cmd_list_element
*list
= remote_show_cmdlist
;
14227 struct ui_out
*uiout
= current_uiout
;
14229 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14230 for (; list
!= NULL
; list
= list
->next
)
14231 if (strcmp (list
->name
, "Z-packet") == 0)
14233 else if (list
->type
== not_set_cmd
)
14234 /* Alias commands are exactly like the original, except they
14235 don't have the normal type. */
14239 ui_out_emit_tuple
option_emitter (uiout
, "option");
14241 uiout
->field_string ("name", list
->name
);
14242 uiout
->text (": ");
14243 if (list
->type
== show_cmd
)
14244 do_show_command (NULL
, from_tty
, list
);
14246 cmd_func (list
, NULL
, from_tty
);
14251 /* Function to be called whenever a new objfile (shlib) is detected. */
14253 remote_new_objfile (struct objfile
*objfile
)
14255 remote_target
*remote
= get_current_remote_target ();
14257 if (remote
!= NULL
) /* Have a remote connection. */
14258 remote
->remote_check_symbols ();
14261 /* Pull all the tracepoints defined on the target and create local
14262 data structures representing them. We don't want to create real
14263 tracepoints yet, we don't want to mess up the user's existing
14267 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14269 struct remote_state
*rs
= get_remote_state ();
14272 /* Ask for a first packet of tracepoint definition. */
14274 getpkt (&rs
->buf
, 0);
14275 p
= rs
->buf
.data ();
14276 while (*p
&& *p
!= 'l')
14278 parse_tracepoint_definition (p
, utpp
);
14279 /* Ask for another packet of tracepoint definition. */
14281 getpkt (&rs
->buf
, 0);
14282 p
= rs
->buf
.data ();
14288 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14290 struct remote_state
*rs
= get_remote_state ();
14293 /* Ask for a first packet of variable definition. */
14295 getpkt (&rs
->buf
, 0);
14296 p
= rs
->buf
.data ();
14297 while (*p
&& *p
!= 'l')
14299 parse_tsv_definition (p
, utsvp
);
14300 /* Ask for another packet of variable definition. */
14302 getpkt (&rs
->buf
, 0);
14303 p
= rs
->buf
.data ();
14308 /* The "set/show range-stepping" show hook. */
14311 show_range_stepping (struct ui_file
*file
, int from_tty
,
14312 struct cmd_list_element
*c
,
14315 fprintf_filtered (file
,
14316 _("Debugger's willingness to use range stepping "
14317 "is %s.\n"), value
);
14320 /* Return true if the vCont;r action is supported by the remote
14324 remote_target::vcont_r_supported ()
14326 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14327 remote_vcont_probe ();
14329 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14330 && get_remote_state ()->supports_vCont
.r
);
14333 /* The "set/show range-stepping" set hook. */
14336 set_range_stepping (const char *ignore_args
, int from_tty
,
14337 struct cmd_list_element
*c
)
14339 /* When enabling, check whether range stepping is actually supported
14340 by the target, and warn if not. */
14341 if (use_range_stepping
)
14343 remote_target
*remote
= get_current_remote_target ();
14345 || !remote
->vcont_r_supported ())
14346 warning (_("Range stepping is not supported by the current target"));
14350 void _initialize_remote ();
14352 _initialize_remote ()
14354 struct cmd_list_element
*cmd
;
14355 const char *cmd_name
;
14357 /* architecture specific data */
14358 remote_g_packet_data_handle
=
14359 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14361 add_target (remote_target_info
, remote_target::open
);
14362 add_target (extended_remote_target_info
, extended_remote_target::open
);
14364 /* Hook into new objfile notification. */
14365 gdb::observers::new_objfile
.attach (remote_new_objfile
);
14368 init_remote_threadtests ();
14371 /* set/show remote ... */
14373 add_basic_prefix_cmd ("remote", class_maintenance
, _("\
14374 Remote protocol specific variables.\n\
14375 Configure various remote-protocol specific variables such as\n\
14376 the packets being used."),
14377 &remote_set_cmdlist
, "set remote ",
14378 0 /* allow-unknown */, &setlist
);
14379 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14380 Remote protocol specific variables.\n\
14381 Configure various remote-protocol specific variables such as\n\
14382 the packets being used."),
14383 &remote_show_cmdlist
, "show remote ",
14384 0 /* allow-unknown */, &showlist
);
14386 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14387 Compare section data on target to the exec file.\n\
14388 Argument is a single section name (default: all loaded sections).\n\
14389 To compare only read-only loaded sections, specify the -r option."),
14392 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14393 Send an arbitrary packet to a remote target.\n\
14394 maintenance packet TEXT\n\
14395 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14396 this command sends the string TEXT to the inferior, and displays the\n\
14397 response packet. GDB supplies the initial `$' character, and the\n\
14398 terminating `#' character and checksum."),
14401 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14402 Set whether to send break if interrupted."), _("\
14403 Show whether to send break if interrupted."), _("\
14404 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14405 set_remotebreak
, show_remotebreak
,
14406 &setlist
, &showlist
);
14407 cmd_name
= "remotebreak";
14408 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
14409 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14410 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14411 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
14412 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14414 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14415 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14417 Set interrupt sequence to remote target."), _("\
14418 Show interrupt sequence to remote target."), _("\
14419 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14420 NULL
, show_interrupt_sequence
,
14421 &remote_set_cmdlist
,
14422 &remote_show_cmdlist
);
14424 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14425 &interrupt_on_connect
, _("\
14426 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14427 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14428 If set, interrupt sequence is sent to remote target."),
14430 &remote_set_cmdlist
, &remote_show_cmdlist
);
14432 /* Install commands for configuring memory read/write packets. */
14434 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14435 Set the maximum number of bytes per memory write packet (deprecated)."),
14437 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14438 Show the maximum number of bytes per memory write packet (deprecated)."),
14440 add_cmd ("memory-write-packet-size", no_class
,
14441 set_memory_write_packet_size
, _("\
14442 Set the maximum number of bytes per memory-write packet.\n\
14443 Specify the number of bytes in a packet or 0 (zero) for the\n\
14444 default packet size. The actual limit is further reduced\n\
14445 dependent on the target. Specify ``fixed'' to disable the\n\
14446 further restriction and ``limit'' to enable that restriction."),
14447 &remote_set_cmdlist
);
14448 add_cmd ("memory-read-packet-size", no_class
,
14449 set_memory_read_packet_size
, _("\
14450 Set the maximum number of bytes per memory-read packet.\n\
14451 Specify the number of bytes in a packet or 0 (zero) for the\n\
14452 default packet size. The actual limit is further reduced\n\
14453 dependent on the target. Specify ``fixed'' to disable the\n\
14454 further restriction and ``limit'' to enable that restriction."),
14455 &remote_set_cmdlist
);
14456 add_cmd ("memory-write-packet-size", no_class
,
14457 show_memory_write_packet_size
,
14458 _("Show the maximum number of bytes per memory-write packet."),
14459 &remote_show_cmdlist
);
14460 add_cmd ("memory-read-packet-size", no_class
,
14461 show_memory_read_packet_size
,
14462 _("Show the maximum number of bytes per memory-read packet."),
14463 &remote_show_cmdlist
);
14465 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14466 &remote_hw_watchpoint_limit
, _("\
14467 Set the maximum number of target hardware watchpoints."), _("\
14468 Show the maximum number of target hardware watchpoints."), _("\
14469 Specify \"unlimited\" for unlimited hardware watchpoints."),
14470 NULL
, show_hardware_watchpoint_limit
,
14471 &remote_set_cmdlist
,
14472 &remote_show_cmdlist
);
14473 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14475 &remote_hw_watchpoint_length_limit
, _("\
14476 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14477 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14478 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14479 NULL
, show_hardware_watchpoint_length_limit
,
14480 &remote_set_cmdlist
, &remote_show_cmdlist
);
14481 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14482 &remote_hw_breakpoint_limit
, _("\
14483 Set the maximum number of target hardware breakpoints."), _("\
14484 Show the maximum number of target hardware breakpoints."), _("\
14485 Specify \"unlimited\" for unlimited hardware breakpoints."),
14486 NULL
, show_hardware_breakpoint_limit
,
14487 &remote_set_cmdlist
, &remote_show_cmdlist
);
14489 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14490 &remote_address_size
, _("\
14491 Set the maximum size of the address (in bits) in a memory packet."), _("\
14492 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14494 NULL
, /* FIXME: i18n: */
14495 &setlist
, &showlist
);
14497 init_all_packet_configs ();
14499 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14500 "X", "binary-download", 1);
14502 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14503 "vCont", "verbose-resume", 0);
14505 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14506 "QPassSignals", "pass-signals", 0);
14508 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14509 "QCatchSyscalls", "catch-syscalls", 0);
14511 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14512 "QProgramSignals", "program-signals", 0);
14514 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14515 "QSetWorkingDir", "set-working-dir", 0);
14517 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14518 "QStartupWithShell", "startup-with-shell", 0);
14520 add_packet_config_cmd (&remote_protocol_packets
14521 [PACKET_QEnvironmentHexEncoded
],
14522 "QEnvironmentHexEncoded", "environment-hex-encoded",
14525 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14526 "QEnvironmentReset", "environment-reset",
14529 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14530 "QEnvironmentUnset", "environment-unset",
14533 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14534 "qSymbol", "symbol-lookup", 0);
14536 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14537 "P", "set-register", 1);
14539 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14540 "p", "fetch-register", 1);
14542 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14543 "Z0", "software-breakpoint", 0);
14545 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14546 "Z1", "hardware-breakpoint", 0);
14548 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14549 "Z2", "write-watchpoint", 0);
14551 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14552 "Z3", "read-watchpoint", 0);
14554 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14555 "Z4", "access-watchpoint", 0);
14557 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14558 "qXfer:auxv:read", "read-aux-vector", 0);
14560 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14561 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14563 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14564 "qXfer:features:read", "target-features", 0);
14566 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14567 "qXfer:libraries:read", "library-info", 0);
14569 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14570 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14572 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14573 "qXfer:memory-map:read", "memory-map", 0);
14575 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14576 "qXfer:osdata:read", "osdata", 0);
14578 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14579 "qXfer:threads:read", "threads", 0);
14581 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14582 "qXfer:siginfo:read", "read-siginfo-object", 0);
14584 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14585 "qXfer:siginfo:write", "write-siginfo-object", 0);
14587 add_packet_config_cmd
14588 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14589 "qXfer:traceframe-info:read", "traceframe-info", 0);
14591 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14592 "qXfer:uib:read", "unwind-info-block", 0);
14594 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14595 "qGetTLSAddr", "get-thread-local-storage-address",
14598 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14599 "qGetTIBAddr", "get-thread-information-block-address",
14602 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14603 "bc", "reverse-continue", 0);
14605 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14606 "bs", "reverse-step", 0);
14608 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14609 "qSupported", "supported-packets", 0);
14611 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14612 "qSearch:memory", "search-memory", 0);
14614 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14615 "qTStatus", "trace-status", 0);
14617 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14618 "vFile:setfs", "hostio-setfs", 0);
14620 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14621 "vFile:open", "hostio-open", 0);
14623 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14624 "vFile:pread", "hostio-pread", 0);
14626 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14627 "vFile:pwrite", "hostio-pwrite", 0);
14629 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14630 "vFile:close", "hostio-close", 0);
14632 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14633 "vFile:unlink", "hostio-unlink", 0);
14635 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14636 "vFile:readlink", "hostio-readlink", 0);
14638 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14639 "vFile:fstat", "hostio-fstat", 0);
14641 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14642 "vAttach", "attach", 0);
14644 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14647 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14648 "QStartNoAckMode", "noack", 0);
14650 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14651 "vKill", "kill", 0);
14653 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14654 "qAttached", "query-attached", 0);
14656 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14657 "ConditionalTracepoints",
14658 "conditional-tracepoints", 0);
14660 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14661 "ConditionalBreakpoints",
14662 "conditional-breakpoints", 0);
14664 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14665 "BreakpointCommands",
14666 "breakpoint-commands", 0);
14668 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14669 "FastTracepoints", "fast-tracepoints", 0);
14671 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14672 "TracepointSource", "TracepointSource", 0);
14674 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14675 "QAllow", "allow", 0);
14677 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14678 "StaticTracepoints", "static-tracepoints", 0);
14680 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14681 "InstallInTrace", "install-in-trace", 0);
14683 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14684 "qXfer:statictrace:read", "read-sdata-object", 0);
14686 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14687 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14689 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14690 "QDisableRandomization", "disable-randomization", 0);
14692 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14693 "QAgent", "agent", 0);
14695 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14696 "QTBuffer:size", "trace-buffer-size", 0);
14698 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14699 "Qbtrace:off", "disable-btrace", 0);
14701 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14702 "Qbtrace:bts", "enable-btrace-bts", 0);
14704 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14705 "Qbtrace:pt", "enable-btrace-pt", 0);
14707 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14708 "qXfer:btrace", "read-btrace", 0);
14710 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14711 "qXfer:btrace-conf", "read-btrace-conf", 0);
14713 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14714 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14716 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14717 "multiprocess-feature", "multiprocess-feature", 0);
14719 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14720 "swbreak-feature", "swbreak-feature", 0);
14722 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14723 "hwbreak-feature", "hwbreak-feature", 0);
14725 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14726 "fork-event-feature", "fork-event-feature", 0);
14728 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14729 "vfork-event-feature", "vfork-event-feature", 0);
14731 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14732 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14734 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14735 "vContSupported", "verbose-resume-supported", 0);
14737 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14738 "exec-event-feature", "exec-event-feature", 0);
14740 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14741 "vCtrlC", "ctrl-c", 0);
14743 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14744 "QThreadEvents", "thread-events", 0);
14746 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14747 "N stop reply", "no-resumed-stop-reply", 0);
14749 /* Assert that we've registered "set remote foo-packet" commands
14750 for all packet configs. */
14754 for (i
= 0; i
< PACKET_MAX
; i
++)
14756 /* Ideally all configs would have a command associated. Some
14757 still don't though. */
14762 case PACKET_QNonStop
:
14763 case PACKET_EnableDisableTracepoints_feature
:
14764 case PACKET_tracenz_feature
:
14765 case PACKET_DisconnectedTracing_feature
:
14766 case PACKET_augmented_libraries_svr4_read_feature
:
14768 /* Additions to this list need to be well justified:
14769 pre-existing packets are OK; new packets are not. */
14777 /* This catches both forgetting to add a config command, and
14778 forgetting to remove a packet from the exception list. */
14779 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14783 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14784 Z sub-packet has its own set and show commands, but users may
14785 have sets to this variable in their .gdbinit files (or in their
14787 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14788 &remote_Z_packet_detect
, _("\
14789 Set use of remote protocol `Z' packets."), _("\
14790 Show use of remote protocol `Z' packets."), _("\
14791 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14793 set_remote_protocol_Z_packet_cmd
,
14794 show_remote_protocol_Z_packet_cmd
,
14795 /* FIXME: i18n: Use of remote protocol
14796 `Z' packets is %s. */
14797 &remote_set_cmdlist
, &remote_show_cmdlist
);
14799 add_basic_prefix_cmd ("remote", class_files
, _("\
14800 Manipulate files on the remote system.\n\
14801 Transfer files to and from the remote target system."),
14802 &remote_cmdlist
, "remote ",
14803 0 /* allow-unknown */, &cmdlist
);
14805 add_cmd ("put", class_files
, remote_put_command
,
14806 _("Copy a local file to the remote system."),
14809 add_cmd ("get", class_files
, remote_get_command
,
14810 _("Copy a remote file to the local system."),
14813 add_cmd ("delete", class_files
, remote_delete_command
,
14814 _("Delete a remote file."),
14817 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14818 &remote_exec_file_var
, _("\
14819 Set the remote pathname for \"run\"."), _("\
14820 Show the remote pathname for \"run\"."), NULL
,
14821 set_remote_exec_file
,
14822 show_remote_exec_file
,
14823 &remote_set_cmdlist
,
14824 &remote_show_cmdlist
);
14826 add_setshow_boolean_cmd ("range-stepping", class_run
,
14827 &use_range_stepping
, _("\
14828 Enable or disable range stepping."), _("\
14829 Show whether target-assisted range stepping is enabled."), _("\
14830 If on, and the target supports it, when stepping a source line, GDB\n\
14831 tells the target to step the corresponding range of addresses itself instead\n\
14832 of issuing multiple single-steps. This speeds up source level\n\
14833 stepping. If off, GDB always issues single-steps, even if range\n\
14834 stepping is supported by the target. The default is on."),
14835 set_range_stepping
,
14836 show_range_stepping
,
14840 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
14841 Set watchdog timer."), _("\
14842 Show watchdog timer."), _("\
14843 When non-zero, this timeout is used instead of waiting forever for a target\n\
14844 to finish a low-level step or continue operation. If the specified amount\n\
14845 of time passes without a response from the target, an error occurs."),
14848 &setlist
, &showlist
);
14850 add_setshow_zuinteger_unlimited_cmd ("remote-packet-max-chars", no_class
,
14851 &remote_packet_max_chars
, _("\
14852 Set the maximum number of characters to display for each remote packet."), _("\
14853 Show the maximum number of characters to display for each remote packet."), _("\
14854 Specify \"unlimited\" to display all the characters."),
14855 NULL
, show_remote_packet_max_chars
,
14856 &setdebuglist
, &showdebuglist
);
14858 /* Eventually initialize fileio. See fileio.c */
14859 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);