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 xfree (rs
->last_pass_packet
);
2619 rs
->last_pass_packet
= pass_packet
;
2622 xfree (pass_packet
);
2626 /* If 'QCatchSyscalls' is supported, tell the remote stub
2627 to report syscalls to GDB. */
2630 remote_target::set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
2631 gdb::array_view
<const int> syscall_counts
)
2633 const char *catch_packet
;
2634 enum packet_result result
;
2637 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2639 /* Not supported. */
2643 if (needed
&& any_count
== 0)
2645 /* Count how many syscalls are to be caught. */
2646 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2648 if (syscall_counts
[i
] != 0)
2655 fprintf_unfiltered (gdb_stdlog
,
2656 "remote_set_syscall_catchpoint "
2657 "pid %d needed %d any_count %d n_sysno %d\n",
2658 pid
, needed
, any_count
, n_sysno
);
2661 std::string built_packet
;
2664 /* Prepare a packet with the sysno list, assuming max 8+1
2665 characters for a sysno. If the resulting packet size is too
2666 big, fallback on the non-selective packet. */
2667 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2668 built_packet
.reserve (maxpktsz
);
2669 built_packet
= "QCatchSyscalls:1";
2672 /* Add in each syscall to be caught. */
2673 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2675 if (syscall_counts
[i
] != 0)
2676 string_appendf (built_packet
, ";%zx", i
);
2679 if (built_packet
.size () > get_remote_packet_size ())
2681 /* catch_packet too big. Fallback to less efficient
2682 non selective mode, with GDB doing the filtering. */
2683 catch_packet
= "QCatchSyscalls:1";
2686 catch_packet
= built_packet
.c_str ();
2689 catch_packet
= "QCatchSyscalls:0";
2691 struct remote_state
*rs
= get_remote_state ();
2693 putpkt (catch_packet
);
2694 getpkt (&rs
->buf
, 0);
2695 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2696 if (result
== PACKET_OK
)
2702 /* If 'QProgramSignals' is supported, tell the remote stub what
2703 signals it should pass through to the inferior when detaching. */
2706 remote_target::program_signals (gdb::array_view
<const unsigned char> signals
)
2708 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2712 struct remote_state
*rs
= get_remote_state ();
2714 gdb_assert (signals
.size () < 256);
2715 for (size_t i
= 0; i
< signals
.size (); i
++)
2720 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2721 strcpy (packet
, "QProgramSignals:");
2722 p
= packet
+ strlen (packet
);
2723 for (size_t i
= 0; i
< signals
.size (); i
++)
2725 if (signal_pass_state (i
))
2728 *p
++ = tohex (i
>> 4);
2729 *p
++ = tohex (i
& 15);
2738 if (!rs
->last_program_signals_packet
2739 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2742 getpkt (&rs
->buf
, 0);
2743 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2744 xfree (rs
->last_program_signals_packet
);
2745 rs
->last_program_signals_packet
= packet
;
2752 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2753 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2754 thread. If GEN is set, set the general thread, if not, then set
2755 the step/continue thread. */
2757 remote_target::set_thread (ptid_t ptid
, int gen
)
2759 struct remote_state
*rs
= get_remote_state ();
2760 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2761 char *buf
= rs
->buf
.data ();
2762 char *endbuf
= buf
+ get_remote_packet_size ();
2768 *buf
++ = gen
? 'g' : 'c';
2769 if (ptid
== magic_null_ptid
)
2770 xsnprintf (buf
, endbuf
- buf
, "0");
2771 else if (ptid
== any_thread_ptid
)
2772 xsnprintf (buf
, endbuf
- buf
, "0");
2773 else if (ptid
== minus_one_ptid
)
2774 xsnprintf (buf
, endbuf
- buf
, "-1");
2776 write_ptid (buf
, endbuf
, ptid
);
2778 getpkt (&rs
->buf
, 0);
2780 rs
->general_thread
= ptid
;
2782 rs
->continue_thread
= ptid
;
2786 remote_target::set_general_thread (ptid_t ptid
)
2788 set_thread (ptid
, 1);
2792 remote_target::set_continue_thread (ptid_t ptid
)
2794 set_thread (ptid
, 0);
2797 /* Change the remote current process. Which thread within the process
2798 ends up selected isn't important, as long as it is the same process
2799 as what INFERIOR_PTID points to.
2801 This comes from that fact that there is no explicit notion of
2802 "selected process" in the protocol. The selected process for
2803 general operations is the process the selected general thread
2807 remote_target::set_general_process ()
2809 struct remote_state
*rs
= get_remote_state ();
2811 /* If the remote can't handle multiple processes, don't bother. */
2812 if (!remote_multi_process_p (rs
))
2815 /* We only need to change the remote current thread if it's pointing
2816 at some other process. */
2817 if (rs
->general_thread
.pid () != inferior_ptid
.pid ())
2818 set_general_thread (inferior_ptid
);
2822 /* Return nonzero if this is the main thread that we made up ourselves
2823 to model non-threaded targets as single-threaded. */
2826 remote_thread_always_alive (ptid_t ptid
)
2828 if (ptid
== magic_null_ptid
)
2829 /* The main thread is always alive. */
2832 if (ptid
.pid () != 0 && ptid
.lwp () == 0)
2833 /* The main thread is always alive. This can happen after a
2834 vAttach, if the remote side doesn't support
2841 /* Return nonzero if the thread PTID is still alive on the remote
2845 remote_target::thread_alive (ptid_t ptid
)
2847 struct remote_state
*rs
= get_remote_state ();
2850 /* Check if this is a thread that we made up ourselves to model
2851 non-threaded targets as single-threaded. */
2852 if (remote_thread_always_alive (ptid
))
2855 p
= rs
->buf
.data ();
2856 endp
= p
+ get_remote_packet_size ();
2859 write_ptid (p
, endp
, ptid
);
2862 getpkt (&rs
->buf
, 0);
2863 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2866 /* Return a pointer to a thread name if we know it and NULL otherwise.
2867 The thread_info object owns the memory for the name. */
2870 remote_target::thread_name (struct thread_info
*info
)
2872 if (info
->priv
!= NULL
)
2874 const std::string
&name
= get_remote_thread_info (info
)->name
;
2875 return !name
.empty () ? name
.c_str () : NULL
;
2881 /* About these extended threadlist and threadinfo packets. They are
2882 variable length packets but, the fields within them are often fixed
2883 length. They are redundant enough to send over UDP as is the
2884 remote protocol in general. There is a matching unit test module
2887 /* WARNING: This threadref data structure comes from the remote O.S.,
2888 libstub protocol encoding, and remote.c. It is not particularly
2891 /* Right now, the internal structure is int. We want it to be bigger.
2892 Plan to fix this. */
2894 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2896 /* gdb_ext_thread_info is an internal GDB data structure which is
2897 equivalent to the reply of the remote threadinfo packet. */
2899 struct gdb_ext_thread_info
2901 threadref threadid
; /* External form of thread reference. */
2902 int active
; /* Has state interesting to GDB?
2904 char display
[256]; /* Brief state display, name,
2905 blocked/suspended. */
2906 char shortname
[32]; /* To be used to name threads. */
2907 char more_display
[256]; /* Long info, statistics, queue depth,
2911 /* The volume of remote transfers can be limited by submitting
2912 a mask containing bits specifying the desired information.
2913 Use a union of these values as the 'selection' parameter to
2914 get_thread_info. FIXME: Make these TAG names more thread specific. */
2916 #define TAG_THREADID 1
2917 #define TAG_EXISTS 2
2918 #define TAG_DISPLAY 4
2919 #define TAG_THREADNAME 8
2920 #define TAG_MOREDISPLAY 16
2922 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2924 static char *unpack_nibble (char *buf
, int *val
);
2926 static char *unpack_byte (char *buf
, int *value
);
2928 static char *pack_int (char *buf
, int value
);
2930 static char *unpack_int (char *buf
, int *value
);
2932 static char *unpack_string (char *src
, char *dest
, int length
);
2934 static char *pack_threadid (char *pkt
, threadref
*id
);
2936 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2938 void int_to_threadref (threadref
*id
, int value
);
2940 static int threadref_to_int (threadref
*ref
);
2942 static void copy_threadref (threadref
*dest
, threadref
*src
);
2944 static int threadmatch (threadref
*dest
, threadref
*src
);
2946 static char *pack_threadinfo_request (char *pkt
, int mode
,
2949 static char *pack_threadlist_request (char *pkt
, int startflag
,
2951 threadref
*nextthread
);
2953 static int remote_newthread_step (threadref
*ref
, void *context
);
2956 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2957 buffer we're allowed to write to. Returns
2958 BUF+CHARACTERS_WRITTEN. */
2961 remote_target::write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2964 struct remote_state
*rs
= get_remote_state ();
2966 if (remote_multi_process_p (rs
))
2970 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2972 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2976 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2978 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2983 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2984 last parsed char. Returns null_ptid if no thread id is found, and
2985 throws an error if the thread id has an invalid format. */
2988 read_ptid (const char *buf
, const char **obuf
)
2990 const char *p
= buf
;
2992 ULONGEST pid
= 0, tid
= 0;
2996 /* Multi-process ptid. */
2997 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2999 error (_("invalid remote ptid: %s"), p
);
3002 pp
= unpack_varlen_hex (p
+ 1, &tid
);
3005 return ptid_t (pid
, tid
, 0);
3008 /* No multi-process. Just a tid. */
3009 pp
= unpack_varlen_hex (p
, &tid
);
3011 /* Return null_ptid when no thread id is found. */
3019 /* Since the stub is not sending a process id, then default to
3020 what's in inferior_ptid, unless it's null at this point. If so,
3021 then since there's no way to know the pid of the reported
3022 threads, use the magic number. */
3023 if (inferior_ptid
== null_ptid
)
3024 pid
= magic_null_ptid
.pid ();
3026 pid
= inferior_ptid
.pid ();
3030 return ptid_t (pid
, tid
, 0);
3036 if (ch
>= 'a' && ch
<= 'f')
3037 return ch
- 'a' + 10;
3038 if (ch
>= '0' && ch
<= '9')
3040 if (ch
>= 'A' && ch
<= 'F')
3041 return ch
- 'A' + 10;
3046 stub_unpack_int (char *buff
, int fieldlength
)
3053 nibble
= stubhex (*buff
++);
3057 retval
= retval
<< 4;
3063 unpack_nibble (char *buf
, int *val
)
3065 *val
= fromhex (*buf
++);
3070 unpack_byte (char *buf
, int *value
)
3072 *value
= stub_unpack_int (buf
, 2);
3077 pack_int (char *buf
, int value
)
3079 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
3080 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
3081 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
3082 buf
= pack_hex_byte (buf
, (value
& 0xff));
3087 unpack_int (char *buf
, int *value
)
3089 *value
= stub_unpack_int (buf
, 8);
3093 #if 0 /* Currently unused, uncomment when needed. */
3094 static char *pack_string (char *pkt
, char *string
);
3097 pack_string (char *pkt
, char *string
)
3102 len
= strlen (string
);
3104 len
= 200; /* Bigger than most GDB packets, junk??? */
3105 pkt
= pack_hex_byte (pkt
, len
);
3109 if ((ch
== '\0') || (ch
== '#'))
3110 ch
= '*'; /* Protect encapsulation. */
3115 #endif /* 0 (unused) */
3118 unpack_string (char *src
, char *dest
, int length
)
3127 pack_threadid (char *pkt
, threadref
*id
)
3130 unsigned char *altid
;
3132 altid
= (unsigned char *) id
;
3133 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
3135 pkt
= pack_hex_byte (pkt
, *altid
++);
3141 unpack_threadid (char *inbuf
, threadref
*id
)
3144 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
3147 altref
= (char *) id
;
3149 while (inbuf
< limit
)
3151 x
= stubhex (*inbuf
++);
3152 y
= stubhex (*inbuf
++);
3153 *altref
++ = (x
<< 4) | y
;
3158 /* Externally, threadrefs are 64 bits but internally, they are still
3159 ints. This is due to a mismatch of specifications. We would like
3160 to use 64bit thread references internally. This is an adapter
3164 int_to_threadref (threadref
*id
, int value
)
3166 unsigned char *scan
;
3168 scan
= (unsigned char *) id
;
3174 *scan
++ = (value
>> 24) & 0xff;
3175 *scan
++ = (value
>> 16) & 0xff;
3176 *scan
++ = (value
>> 8) & 0xff;
3177 *scan
++ = (value
& 0xff);
3181 threadref_to_int (threadref
*ref
)
3184 unsigned char *scan
;
3190 value
= (value
<< 8) | ((*scan
++) & 0xff);
3195 copy_threadref (threadref
*dest
, threadref
*src
)
3198 unsigned char *csrc
, *cdest
;
3200 csrc
= (unsigned char *) src
;
3201 cdest
= (unsigned char *) dest
;
3208 threadmatch (threadref
*dest
, threadref
*src
)
3210 /* Things are broken right now, so just assume we got a match. */
3212 unsigned char *srcp
, *destp
;
3214 srcp
= (char *) src
;
3215 destp
= (char *) dest
;
3219 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
3226 threadid:1, # always request threadid
3233 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3236 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
3238 *pkt
++ = 'q'; /* Info Query */
3239 *pkt
++ = 'P'; /* process or thread info */
3240 pkt
= pack_int (pkt
, mode
); /* mode */
3241 pkt
= pack_threadid (pkt
, id
); /* threadid */
3242 *pkt
= '\0'; /* terminate */
3246 /* These values tag the fields in a thread info response packet. */
3247 /* Tagging the fields allows us to request specific fields and to
3248 add more fields as time goes by. */
3250 #define TAG_THREADID 1 /* Echo the thread identifier. */
3251 #define TAG_EXISTS 2 /* Is this process defined enough to
3252 fetch registers and its stack? */
3253 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3254 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3255 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3259 remote_target::remote_unpack_thread_info_response (char *pkt
,
3260 threadref
*expectedref
,
3261 gdb_ext_thread_info
*info
)
3263 struct remote_state
*rs
= get_remote_state ();
3267 char *limit
= pkt
+ rs
->buf
.size (); /* Plausible parsing limit. */
3270 /* info->threadid = 0; FIXME: implement zero_threadref. */
3272 info
->display
[0] = '\0';
3273 info
->shortname
[0] = '\0';
3274 info
->more_display
[0] = '\0';
3276 /* Assume the characters indicating the packet type have been
3278 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
3279 pkt
= unpack_threadid (pkt
, &ref
);
3282 warning (_("Incomplete response to threadinfo request."));
3283 if (!threadmatch (&ref
, expectedref
))
3284 { /* This is an answer to a different request. */
3285 warning (_("ERROR RMT Thread info mismatch."));
3288 copy_threadref (&info
->threadid
, &ref
);
3290 /* Loop on tagged fields , try to bail if something goes wrong. */
3292 /* Packets are terminated with nulls. */
3293 while ((pkt
< limit
) && mask
&& *pkt
)
3295 pkt
= unpack_int (pkt
, &tag
); /* tag */
3296 pkt
= unpack_byte (pkt
, &length
); /* length */
3297 if (!(tag
& mask
)) /* Tags out of synch with mask. */
3299 warning (_("ERROR RMT: threadinfo tag mismatch."));
3303 if (tag
== TAG_THREADID
)
3307 warning (_("ERROR RMT: length of threadid is not 16."));
3311 pkt
= unpack_threadid (pkt
, &ref
);
3312 mask
= mask
& ~TAG_THREADID
;
3315 if (tag
== TAG_EXISTS
)
3317 info
->active
= stub_unpack_int (pkt
, length
);
3319 mask
= mask
& ~(TAG_EXISTS
);
3322 warning (_("ERROR RMT: 'exists' length too long."));
3328 if (tag
== TAG_THREADNAME
)
3330 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
3331 mask
= mask
& ~TAG_THREADNAME
;
3334 if (tag
== TAG_DISPLAY
)
3336 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
3337 mask
= mask
& ~TAG_DISPLAY
;
3340 if (tag
== TAG_MOREDISPLAY
)
3342 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
3343 mask
= mask
& ~TAG_MOREDISPLAY
;
3346 warning (_("ERROR RMT: unknown thread info tag."));
3347 break; /* Not a tag we know about. */
3353 remote_target::remote_get_threadinfo (threadref
*threadid
,
3355 gdb_ext_thread_info
*info
)
3357 struct remote_state
*rs
= get_remote_state ();
3360 pack_threadinfo_request (rs
->buf
.data (), fieldset
, threadid
);
3362 getpkt (&rs
->buf
, 0);
3364 if (rs
->buf
[0] == '\0')
3367 result
= remote_unpack_thread_info_response (&rs
->buf
[2],
3372 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3375 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
3376 threadref
*nextthread
)
3378 *pkt
++ = 'q'; /* info query packet */
3379 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
3380 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
3381 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
3382 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
3387 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3390 remote_target::parse_threadlist_response (char *pkt
, int result_limit
,
3391 threadref
*original_echo
,
3392 threadref
*resultlist
,
3395 struct remote_state
*rs
= get_remote_state ();
3397 int count
, resultcount
, done
;
3400 /* Assume the 'q' and 'M chars have been stripped. */
3401 limit
= pkt
+ (rs
->buf
.size () - BUF_THREAD_ID_SIZE
);
3402 /* done parse past here */
3403 pkt
= unpack_byte (pkt
, &count
); /* count field */
3404 pkt
= unpack_nibble (pkt
, &done
);
3405 /* The first threadid is the argument threadid. */
3406 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
3407 while ((count
-- > 0) && (pkt
< limit
))
3409 pkt
= unpack_threadid (pkt
, resultlist
++);
3410 if (resultcount
++ >= result_limit
)
3418 /* Fetch the next batch of threads from the remote. Returns -1 if the
3419 qL packet is not supported, 0 on error and 1 on success. */
3422 remote_target::remote_get_threadlist (int startflag
, threadref
*nextthread
,
3423 int result_limit
, int *done
, int *result_count
,
3424 threadref
*threadlist
)
3426 struct remote_state
*rs
= get_remote_state ();
3429 /* Truncate result limit to be smaller than the packet size. */
3430 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
3431 >= get_remote_packet_size ())
3432 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
3434 pack_threadlist_request (rs
->buf
.data (), startflag
, result_limit
,
3437 getpkt (&rs
->buf
, 0);
3438 if (rs
->buf
[0] == '\0')
3440 /* Packet not supported. */
3445 parse_threadlist_response (&rs
->buf
[2], result_limit
,
3446 &rs
->echo_nextthread
, threadlist
, done
);
3448 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
3450 /* FIXME: This is a good reason to drop the packet. */
3451 /* Possibly, there is a duplicate response. */
3453 retransmit immediatly - race conditions
3454 retransmit after timeout - yes
3456 wait for packet, then exit
3458 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3459 return 0; /* I choose simply exiting. */
3461 if (*result_count
<= 0)
3465 warning (_("RMT ERROR : failed to get remote thread list."));
3468 return result
; /* break; */
3470 if (*result_count
> result_limit
)
3473 warning (_("RMT ERROR: threadlist response longer than requested."));
3479 /* Fetch the list of remote threads, with the qL packet, and call
3480 STEPFUNCTION for each thread found. Stops iterating and returns 1
3481 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3482 STEPFUNCTION returns false. If the packet is not supported,
3486 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction
,
3487 void *context
, int looplimit
)
3489 struct remote_state
*rs
= get_remote_state ();
3490 int done
, i
, result_count
;
3498 if (loopcount
++ > looplimit
)
3501 warning (_("Remote fetch threadlist -infinite loop-."));
3504 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
3505 MAXTHREADLISTRESULTS
,
3506 &done
, &result_count
,
3507 rs
->resultthreadlist
);
3510 /* Clear for later iterations. */
3512 /* Setup to resume next batch of thread references, set nextthread. */
3513 if (result_count
>= 1)
3514 copy_threadref (&rs
->nextthread
,
3515 &rs
->resultthreadlist
[result_count
- 1]);
3517 while (result_count
--)
3519 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
3529 /* A thread found on the remote target. */
3533 explicit thread_item (ptid_t ptid_
)
3537 thread_item (thread_item
&&other
) = default;
3538 thread_item
&operator= (thread_item
&&other
) = default;
3540 DISABLE_COPY_AND_ASSIGN (thread_item
);
3542 /* The thread's PTID. */
3545 /* The thread's extra info. */
3548 /* The thread's name. */
3551 /* The core the thread was running on. -1 if not known. */
3554 /* The thread handle associated with the thread. */
3555 gdb::byte_vector thread_handle
;
3558 /* Context passed around to the various methods listing remote
3559 threads. As new threads are found, they're added to the ITEMS
3562 struct threads_listing_context
3564 /* Return true if this object contains an entry for a thread with ptid
3567 bool contains_thread (ptid_t ptid
) const
3569 auto match_ptid
= [&] (const thread_item
&item
)
3571 return item
.ptid
== ptid
;
3574 auto it
= std::find_if (this->items
.begin (),
3578 return it
!= this->items
.end ();
3581 /* Remove the thread with ptid PTID. */
3583 void remove_thread (ptid_t ptid
)
3585 auto match_ptid
= [&] (const thread_item
&item
)
3587 return item
.ptid
== ptid
;
3590 auto it
= std::remove_if (this->items
.begin (),
3594 if (it
!= this->items
.end ())
3595 this->items
.erase (it
);
3598 /* The threads found on the remote target. */
3599 std::vector
<thread_item
> items
;
3603 remote_newthread_step (threadref
*ref
, void *data
)
3605 struct threads_listing_context
*context
3606 = (struct threads_listing_context
*) data
;
3607 int pid
= inferior_ptid
.pid ();
3608 int lwp
= threadref_to_int (ref
);
3609 ptid_t
ptid (pid
, lwp
);
3611 context
->items
.emplace_back (ptid
);
3613 return 1; /* continue iterator */
3616 #define CRAZY_MAX_THREADS 1000
3619 remote_target::remote_current_thread (ptid_t oldpid
)
3621 struct remote_state
*rs
= get_remote_state ();
3624 getpkt (&rs
->buf
, 0);
3625 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3630 result
= read_ptid (&rs
->buf
[2], &obuf
);
3631 if (*obuf
!= '\0' && remote_debug
)
3632 fprintf_unfiltered (gdb_stdlog
,
3633 "warning: garbage in qC reply\n");
3641 /* List remote threads using the deprecated qL packet. */
3644 remote_target::remote_get_threads_with_ql (threads_listing_context
*context
)
3646 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3647 CRAZY_MAX_THREADS
) >= 0)
3653 #if defined(HAVE_LIBEXPAT)
3656 start_thread (struct gdb_xml_parser
*parser
,
3657 const struct gdb_xml_element
*element
,
3659 std::vector
<gdb_xml_value
> &attributes
)
3661 struct threads_listing_context
*data
3662 = (struct threads_listing_context
*) user_data
;
3663 struct gdb_xml_value
*attr
;
3665 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3666 ptid_t ptid
= read_ptid (id
, NULL
);
3668 data
->items
.emplace_back (ptid
);
3669 thread_item
&item
= data
->items
.back ();
3671 attr
= xml_find_attribute (attributes
, "core");
3673 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3675 attr
= xml_find_attribute (attributes
, "name");
3677 item
.name
= (const char *) attr
->value
.get ();
3679 attr
= xml_find_attribute (attributes
, "handle");
3681 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3685 end_thread (struct gdb_xml_parser
*parser
,
3686 const struct gdb_xml_element
*element
,
3687 void *user_data
, const char *body_text
)
3689 struct threads_listing_context
*data
3690 = (struct threads_listing_context
*) user_data
;
3692 if (body_text
!= NULL
&& *body_text
!= '\0')
3693 data
->items
.back ().extra
= body_text
;
3696 const struct gdb_xml_attribute thread_attributes
[] = {
3697 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3698 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3699 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3700 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3701 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3704 const struct gdb_xml_element thread_children
[] = {
3705 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3708 const struct gdb_xml_element threads_children
[] = {
3709 { "thread", thread_attributes
, thread_children
,
3710 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3711 start_thread
, end_thread
},
3712 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3715 const struct gdb_xml_element threads_elements
[] = {
3716 { "threads", NULL
, threads_children
,
3717 GDB_XML_EF_NONE
, NULL
, NULL
},
3718 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3723 /* List remote threads using qXfer:threads:read. */
3726 remote_target::remote_get_threads_with_qxfer (threads_listing_context
*context
)
3728 #if defined(HAVE_LIBEXPAT)
3729 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3731 gdb::optional
<gdb::char_vector
> xml
3732 = target_read_stralloc (this, TARGET_OBJECT_THREADS
, NULL
);
3734 if (xml
&& (*xml
)[0] != '\0')
3736 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3737 threads_elements
, xml
->data (), context
);
3747 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3750 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context
*context
)
3752 struct remote_state
*rs
= get_remote_state ();
3754 if (rs
->use_threadinfo_query
)
3758 putpkt ("qfThreadInfo");
3759 getpkt (&rs
->buf
, 0);
3760 bufp
= rs
->buf
.data ();
3761 if (bufp
[0] != '\0') /* q packet recognized */
3763 while (*bufp
++ == 'm') /* reply contains one or more TID */
3767 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3768 context
->items
.emplace_back (ptid
);
3770 while (*bufp
++ == ','); /* comma-separated list */
3771 putpkt ("qsThreadInfo");
3772 getpkt (&rs
->buf
, 0);
3773 bufp
= rs
->buf
.data ();
3779 /* Packet not recognized. */
3780 rs
->use_threadinfo_query
= 0;
3787 /* Return true if INF only has one non-exited thread. */
3790 has_single_non_exited_thread (inferior
*inf
)
3793 for (thread_info
*tp ATTRIBUTE_UNUSED
: inf
->non_exited_threads ())
3799 /* Implement the to_update_thread_list function for the remote
3803 remote_target::update_thread_list ()
3805 struct threads_listing_context context
;
3808 /* We have a few different mechanisms to fetch the thread list. Try
3809 them all, starting with the most preferred one first, falling
3810 back to older methods. */
3811 if (remote_get_threads_with_qxfer (&context
)
3812 || remote_get_threads_with_qthreadinfo (&context
)
3813 || remote_get_threads_with_ql (&context
))
3817 if (context
.items
.empty ()
3818 && remote_thread_always_alive (inferior_ptid
))
3820 /* Some targets don't really support threads, but still
3821 reply an (empty) thread list in response to the thread
3822 listing packets, instead of replying "packet not
3823 supported". Exit early so we don't delete the main
3828 /* CONTEXT now holds the current thread list on the remote
3829 target end. Delete GDB-side threads no longer found on the
3831 for (thread_info
*tp
: all_threads_safe ())
3833 if (tp
->inf
->process_target () != this)
3836 if (!context
.contains_thread (tp
->ptid
))
3838 /* Do not remove the thread if it is the last thread in
3839 the inferior. This situation happens when we have a
3840 pending exit process status to process. Otherwise we
3841 may end up with a seemingly live inferior (i.e. pid
3842 != 0) that has no threads. */
3843 if (has_single_non_exited_thread (tp
->inf
))
3851 /* Remove any unreported fork child threads from CONTEXT so
3852 that we don't interfere with follow fork, which is where
3853 creation of such threads is handled. */
3854 remove_new_fork_children (&context
);
3856 /* And now add threads we don't know about yet to our list. */
3857 for (thread_item
&item
: context
.items
)
3859 if (item
.ptid
!= null_ptid
)
3861 /* In non-stop mode, we assume new found threads are
3862 executing until proven otherwise with a stop reply.
3863 In all-stop, we can only get here if all threads are
3865 int executing
= target_is_non_stop_p () ? 1 : 0;
3867 remote_notice_new_inferior (item
.ptid
, executing
);
3869 thread_info
*tp
= find_thread_ptid (this, item
.ptid
);
3870 remote_thread_info
*info
= get_remote_thread_info (tp
);
3871 info
->core
= item
.core
;
3872 info
->extra
= std::move (item
.extra
);
3873 info
->name
= std::move (item
.name
);
3874 info
->thread_handle
= std::move (item
.thread_handle
);
3881 /* If no thread listing method is supported, then query whether
3882 each known thread is alive, one by one, with the T packet.
3883 If the target doesn't support threads at all, then this is a
3884 no-op. See remote_thread_alive. */
3890 * Collect a descriptive string about the given thread.
3891 * The target may say anything it wants to about the thread
3892 * (typically info about its blocked / runnable state, name, etc.).
3893 * This string will appear in the info threads display.
3895 * Optional: targets are not required to implement this function.
3899 remote_target::extra_thread_info (thread_info
*tp
)
3901 struct remote_state
*rs
= get_remote_state ();
3904 struct gdb_ext_thread_info threadinfo
;
3906 if (rs
->remote_desc
== 0) /* paranoia */
3907 internal_error (__FILE__
, __LINE__
,
3908 _("remote_threads_extra_info"));
3910 if (tp
->ptid
== magic_null_ptid
3911 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
3912 /* This is the main thread which was added by GDB. The remote
3913 server doesn't know about it. */
3916 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
3918 /* If already have cached info, use it. */
3919 if (!extra
.empty ())
3920 return extra
.c_str ();
3922 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3924 /* If we're using qXfer:threads:read, then the extra info is
3925 included in the XML. So if we didn't have anything cached,
3926 it's because there's really no extra info. */
3930 if (rs
->use_threadextra_query
)
3932 char *b
= rs
->buf
.data ();
3933 char *endb
= b
+ get_remote_packet_size ();
3935 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3937 write_ptid (b
, endb
, tp
->ptid
);
3940 getpkt (&rs
->buf
, 0);
3941 if (rs
->buf
[0] != 0)
3943 extra
.resize (strlen (rs
->buf
.data ()) / 2);
3944 hex2bin (rs
->buf
.data (), (gdb_byte
*) &extra
[0], extra
.size ());
3945 return extra
.c_str ();
3949 /* If the above query fails, fall back to the old method. */
3950 rs
->use_threadextra_query
= 0;
3951 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3952 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3953 int_to_threadref (&id
, tp
->ptid
.lwp ());
3954 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3955 if (threadinfo
.active
)
3957 if (*threadinfo
.shortname
)
3958 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
3959 if (*threadinfo
.display
)
3961 if (!extra
.empty ())
3963 string_appendf (extra
, " State: %s", threadinfo
.display
);
3965 if (*threadinfo
.more_display
)
3967 if (!extra
.empty ())
3969 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
3971 return extra
.c_str ();
3978 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
3979 struct static_tracepoint_marker
*marker
)
3981 struct remote_state
*rs
= get_remote_state ();
3982 char *p
= rs
->buf
.data ();
3984 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3986 p
+= hexnumstr (p
, addr
);
3988 getpkt (&rs
->buf
, 0);
3989 p
= rs
->buf
.data ();
3992 error (_("Remote failure reply: %s"), p
);
3996 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
4003 std::vector
<static_tracepoint_marker
>
4004 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
4006 struct remote_state
*rs
= get_remote_state ();
4007 std::vector
<static_tracepoint_marker
> markers
;
4009 static_tracepoint_marker marker
;
4011 /* Ask for a first packet of static tracepoint marker
4014 getpkt (&rs
->buf
, 0);
4015 p
= rs
->buf
.data ();
4017 error (_("Remote failure reply: %s"), p
);
4023 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
4025 if (strid
== NULL
|| marker
.str_id
== strid
)
4026 markers
.push_back (std::move (marker
));
4028 while (*p
++ == ','); /* comma-separated list */
4029 /* Ask for another packet of static tracepoint definition. */
4031 getpkt (&rs
->buf
, 0);
4032 p
= rs
->buf
.data ();
4039 /* Implement the to_get_ada_task_ptid function for the remote targets. */
4042 remote_target::get_ada_task_ptid (long lwp
, long thread
)
4044 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
4048 /* Restart the remote side; this is an extended protocol operation. */
4051 remote_target::extended_remote_restart ()
4053 struct remote_state
*rs
= get_remote_state ();
4055 /* Send the restart command; for reasons I don't understand the
4056 remote side really expects a number after the "R". */
4057 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "R%x", 0);
4060 remote_fileio_reset ();
4063 /* Clean up connection to a remote debugger. */
4066 remote_target::close ()
4068 /* Make sure we leave stdin registered in the event loop. */
4071 trace_reset_local_state ();
4076 remote_target::~remote_target ()
4078 struct remote_state
*rs
= get_remote_state ();
4080 /* Check for NULL because we may get here with a partially
4081 constructed target/connection. */
4082 if (rs
->remote_desc
== nullptr)
4085 serial_close (rs
->remote_desc
);
4087 /* We are destroying the remote target, so we should discard
4088 everything of this target. */
4089 discard_pending_stop_replies_in_queue ();
4091 if (rs
->remote_async_inferior_event_token
)
4092 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4094 delete rs
->notif_state
;
4097 /* Query the remote side for the text, data and bss offsets. */
4100 remote_target::get_offsets ()
4102 struct remote_state
*rs
= get_remote_state ();
4105 int lose
, num_segments
= 0, do_sections
, do_segments
;
4106 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4108 if (symfile_objfile
== NULL
)
4111 putpkt ("qOffsets");
4112 getpkt (&rs
->buf
, 0);
4113 buf
= rs
->buf
.data ();
4115 if (buf
[0] == '\000')
4116 return; /* Return silently. Stub doesn't support
4120 warning (_("Remote failure reply: %s"), buf
);
4124 /* Pick up each field in turn. This used to be done with scanf, but
4125 scanf will make trouble if CORE_ADDR size doesn't match
4126 conversion directives correctly. The following code will work
4127 with any size of CORE_ADDR. */
4128 text_addr
= data_addr
= bss_addr
= 0;
4132 if (startswith (ptr
, "Text="))
4135 /* Don't use strtol, could lose on big values. */
4136 while (*ptr
&& *ptr
!= ';')
4137 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4139 if (startswith (ptr
, ";Data="))
4142 while (*ptr
&& *ptr
!= ';')
4143 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4148 if (!lose
&& startswith (ptr
, ";Bss="))
4151 while (*ptr
&& *ptr
!= ';')
4152 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4154 if (bss_addr
!= data_addr
)
4155 warning (_("Target reported unsupported offsets: %s"), buf
);
4160 else if (startswith (ptr
, "TextSeg="))
4163 /* Don't use strtol, could lose on big values. */
4164 while (*ptr
&& *ptr
!= ';')
4165 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4168 if (startswith (ptr
, ";DataSeg="))
4171 while (*ptr
&& *ptr
!= ';')
4172 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4180 error (_("Malformed response to offset query, %s"), buf
);
4181 else if (*ptr
!= '\0')
4182 warning (_("Target reported unsupported offsets: %s"), buf
);
4184 section_offsets offs
= symfile_objfile
->section_offsets
;
4186 symfile_segment_data_up data
4187 = get_symfile_segment_data (symfile_objfile
->obfd
);
4188 do_segments
= (data
!= NULL
);
4189 do_sections
= num_segments
== 0;
4191 if (num_segments
> 0)
4193 segments
[0] = text_addr
;
4194 segments
[1] = data_addr
;
4196 /* If we have two segments, we can still try to relocate everything
4197 by assuming that the .text and .data offsets apply to the whole
4198 text and data segments. Convert the offsets given in the packet
4199 to base addresses for symfile_map_offsets_to_segments. */
4200 else if (data
!= nullptr && data
->segments
.size () == 2)
4202 segments
[0] = data
->segments
[0].base
+ text_addr
;
4203 segments
[1] = data
->segments
[1].base
+ data_addr
;
4206 /* If the object file has only one segment, assume that it is text
4207 rather than data; main programs with no writable data are rare,
4208 but programs with no code are useless. Of course the code might
4209 have ended up in the data segment... to detect that we would need
4210 the permissions here. */
4211 else if (data
&& data
->segments
.size () == 1)
4213 segments
[0] = data
->segments
[0].base
+ text_addr
;
4216 /* There's no way to relocate by segment. */
4222 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
,
4224 num_segments
, segments
);
4226 if (ret
== 0 && !do_sections
)
4227 error (_("Can not handle qOffsets TextSeg "
4228 "response with this symbol file"));
4236 offs
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
4238 /* This is a temporary kludge to force data and bss to use the
4239 same offsets because that's what nlmconv does now. The real
4240 solution requires changes to the stub and remote.c that I
4241 don't have time to do right now. */
4243 offs
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
4244 offs
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
4247 objfile_relocate (symfile_objfile
, offs
);
4250 /* Send interrupt_sequence to remote target. */
4253 remote_target::send_interrupt_sequence ()
4255 struct remote_state
*rs
= get_remote_state ();
4257 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4258 remote_serial_write ("\x03", 1);
4259 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4260 serial_send_break (rs
->remote_desc
);
4261 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4263 serial_send_break (rs
->remote_desc
);
4264 remote_serial_write ("g", 1);
4267 internal_error (__FILE__
, __LINE__
,
4268 _("Invalid value for interrupt_sequence_mode: %s."),
4269 interrupt_sequence_mode
);
4273 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4274 and extract the PTID. Returns NULL_PTID if not found. */
4277 stop_reply_extract_thread (char *stop_reply
)
4279 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4283 /* Txx r:val ; r:val (...) */
4286 /* Look for "register" named "thread". */
4291 p1
= strchr (p
, ':');
4295 if (strncmp (p
, "thread", p1
- p
) == 0)
4296 return read_ptid (++p1
, &p
);
4298 p1
= strchr (p
, ';');
4310 /* Determine the remote side's current thread. If we have a stop
4311 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4312 "thread" register we can extract the current thread from. If not,
4313 ask the remote which is the current thread with qC. The former
4314 method avoids a roundtrip. */
4317 remote_target::get_current_thread (char *wait_status
)
4319 ptid_t ptid
= null_ptid
;
4321 /* Note we don't use remote_parse_stop_reply as that makes use of
4322 the target architecture, which we haven't yet fully determined at
4324 if (wait_status
!= NULL
)
4325 ptid
= stop_reply_extract_thread (wait_status
);
4326 if (ptid
== null_ptid
)
4327 ptid
= remote_current_thread (inferior_ptid
);
4332 /* Query the remote target for which is the current thread/process,
4333 add it to our tables, and update INFERIOR_PTID. The caller is
4334 responsible for setting the state such that the remote end is ready
4335 to return the current thread.
4337 This function is called after handling the '?' or 'vRun' packets,
4338 whose response is a stop reply from which we can also try
4339 extracting the thread. If the target doesn't support the explicit
4340 qC query, we infer the current thread from that stop reply, passed
4341 in in WAIT_STATUS, which may be NULL. */
4344 remote_target::add_current_inferior_and_thread (char *wait_status
)
4346 struct remote_state
*rs
= get_remote_state ();
4347 bool fake_pid_p
= false;
4349 inferior_ptid
= null_ptid
;
4351 /* Now, if we have thread information, update inferior_ptid. */
4352 ptid_t curr_ptid
= get_current_thread (wait_status
);
4354 if (curr_ptid
!= null_ptid
)
4356 if (!remote_multi_process_p (rs
))
4361 /* Without this, some commands which require an active target
4362 (such as kill) won't work. This variable serves (at least)
4363 double duty as both the pid of the target process (if it has
4364 such), and as a flag indicating that a target is active. */
4365 curr_ptid
= magic_null_ptid
;
4369 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4371 /* Add the main thread and switch to it. Don't try reading
4372 registers yet, since we haven't fetched the target description
4374 thread_info
*tp
= add_thread_silent (this, curr_ptid
);
4375 switch_to_thread_no_regs (tp
);
4378 /* Print info about a thread that was found already stopped on
4382 print_one_stopped_thread (struct thread_info
*thread
)
4384 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
4386 switch_to_thread (thread
);
4387 thread
->suspend
.stop_pc
= get_frame_pc (get_current_frame ());
4388 set_current_sal_from_frame (get_current_frame ());
4390 thread
->suspend
.waitstatus_pending_p
= 0;
4392 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
4394 enum gdb_signal sig
= ws
->value
.sig
;
4396 if (signal_print_state (sig
))
4397 gdb::observers::signal_received
.notify (sig
);
4399 gdb::observers::normal_stop
.notify (NULL
, 1);
4402 /* Process all initial stop replies the remote side sent in response
4403 to the ? packet. These indicate threads that were already stopped
4404 on initial connection. We mark these threads as stopped and print
4405 their current frame before giving the user the prompt. */
4408 remote_target::process_initial_stop_replies (int from_tty
)
4410 int pending_stop_replies
= stop_reply_queue_length ();
4411 struct thread_info
*selected
= NULL
;
4412 struct thread_info
*lowest_stopped
= NULL
;
4413 struct thread_info
*first
= NULL
;
4415 /* Consume the initial pending events. */
4416 while (pending_stop_replies
-- > 0)
4418 ptid_t waiton_ptid
= minus_one_ptid
;
4420 struct target_waitstatus ws
;
4421 int ignore_event
= 0;
4423 memset (&ws
, 0, sizeof (ws
));
4424 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4426 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4430 case TARGET_WAITKIND_IGNORE
:
4431 case TARGET_WAITKIND_NO_RESUMED
:
4432 case TARGET_WAITKIND_SIGNALLED
:
4433 case TARGET_WAITKIND_EXITED
:
4434 /* We shouldn't see these, but if we do, just ignore. */
4436 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
4440 case TARGET_WAITKIND_EXECD
:
4441 xfree (ws
.value
.execd_pathname
);
4450 thread_info
*evthread
= find_thread_ptid (this, event_ptid
);
4452 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4454 enum gdb_signal sig
= ws
.value
.sig
;
4456 /* Stubs traditionally report SIGTRAP as initial signal,
4457 instead of signal 0. Suppress it. */
4458 if (sig
== GDB_SIGNAL_TRAP
)
4460 evthread
->suspend
.stop_signal
= sig
;
4464 evthread
->suspend
.waitstatus
= ws
;
4466 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4467 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4468 evthread
->suspend
.waitstatus_pending_p
= 1;
4470 set_executing (this, event_ptid
, false);
4471 set_running (this, event_ptid
, false);
4472 get_remote_thread_info (evthread
)->vcont_resumed
= 0;
4475 /* "Notice" the new inferiors before anything related to
4476 registers/memory. */
4477 for (inferior
*inf
: all_non_exited_inferiors (this))
4479 inf
->needs_setup
= 1;
4483 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4484 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4489 /* If all-stop on top of non-stop, pause all threads. Note this
4490 records the threads' stop pc, so must be done after "noticing"
4494 stop_all_threads ();
4496 /* If all threads of an inferior were already stopped, we
4497 haven't setup the inferior yet. */
4498 for (inferior
*inf
: all_non_exited_inferiors (this))
4500 if (inf
->needs_setup
)
4502 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4503 switch_to_thread_no_regs (thread
);
4509 /* Now go over all threads that are stopped, and print their current
4510 frame. If all-stop, then if there's a signalled thread, pick
4512 for (thread_info
*thread
: all_non_exited_threads (this))
4518 thread
->set_running (false);
4519 else if (thread
->state
!= THREAD_STOPPED
)
4522 if (selected
== NULL
4523 && thread
->suspend
.waitstatus_pending_p
)
4526 if (lowest_stopped
== NULL
4527 || thread
->inf
->num
< lowest_stopped
->inf
->num
4528 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4529 lowest_stopped
= thread
;
4532 print_one_stopped_thread (thread
);
4535 /* In all-stop, we only print the status of one thread, and leave
4536 others with their status pending. */
4539 thread_info
*thread
= selected
;
4541 thread
= lowest_stopped
;
4545 print_one_stopped_thread (thread
);
4548 /* For "info program". */
4549 thread_info
*thread
= inferior_thread ();
4550 if (thread
->state
== THREAD_STOPPED
)
4551 set_last_target_status (this, inferior_ptid
, thread
->suspend
.waitstatus
);
4554 /* Start the remote connection and sync state. */
4557 remote_target::start_remote (int from_tty
, int extended_p
)
4559 struct remote_state
*rs
= get_remote_state ();
4560 struct packet_config
*noack_config
;
4561 char *wait_status
= NULL
;
4563 /* Signal other parts that we're going through the initial setup,
4564 and so things may not be stable yet. E.g., we don't try to
4565 install tracepoints until we've relocated symbols. Also, a
4566 Ctrl-C before we're connected and synced up can't interrupt the
4567 target. Instead, it offers to drop the (potentially wedged)
4569 rs
->starting_up
= 1;
4573 if (interrupt_on_connect
)
4574 send_interrupt_sequence ();
4576 /* Ack any packet which the remote side has already sent. */
4577 remote_serial_write ("+", 1);
4579 /* The first packet we send to the target is the optional "supported
4580 packets" request. If the target can answer this, it will tell us
4581 which later probes to skip. */
4582 remote_query_supported ();
4584 /* If the stub wants to get a QAllow, compose one and send it. */
4585 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4588 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4589 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4590 as a reply to known packet. For packet "vFile:setfs:" it is an
4591 invalid reply and GDB would return error in
4592 remote_hostio_set_filesystem, making remote files access impossible.
4593 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4594 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4596 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4598 putpkt (v_mustreplyempty
);
4599 getpkt (&rs
->buf
, 0);
4600 if (strcmp (rs
->buf
.data (), "OK") == 0)
4601 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4602 else if (strcmp (rs
->buf
.data (), "") != 0)
4603 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4607 /* Next, we possibly activate noack mode.
4609 If the QStartNoAckMode packet configuration is set to AUTO,
4610 enable noack mode if the stub reported a wish for it with
4613 If set to TRUE, then enable noack mode even if the stub didn't
4614 report it in qSupported. If the stub doesn't reply OK, the
4615 session ends with an error.
4617 If FALSE, then don't activate noack mode, regardless of what the
4618 stub claimed should be the default with qSupported. */
4620 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4621 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4623 putpkt ("QStartNoAckMode");
4624 getpkt (&rs
->buf
, 0);
4625 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4631 /* Tell the remote that we are using the extended protocol. */
4633 getpkt (&rs
->buf
, 0);
4636 /* Let the target know which signals it is allowed to pass down to
4638 update_signals_program_target ();
4640 /* Next, if the target can specify a description, read it. We do
4641 this before anything involving memory or registers. */
4642 target_find_description ();
4644 /* Next, now that we know something about the target, update the
4645 address spaces in the program spaces. */
4646 update_address_spaces ();
4648 /* On OSs where the list of libraries is global to all
4649 processes, we fetch them early. */
4650 if (gdbarch_has_global_solist (target_gdbarch ()))
4651 solib_add (NULL
, from_tty
, auto_solib_add
);
4653 if (target_is_non_stop_p ())
4655 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4656 error (_("Non-stop mode requested, but remote "
4657 "does not support non-stop"));
4659 putpkt ("QNonStop:1");
4660 getpkt (&rs
->buf
, 0);
4662 if (strcmp (rs
->buf
.data (), "OK") != 0)
4663 error (_("Remote refused setting non-stop mode with: %s"),
4666 /* Find about threads and processes the stub is already
4667 controlling. We default to adding them in the running state.
4668 The '?' query below will then tell us about which threads are
4670 this->update_thread_list ();
4672 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4674 /* Don't assume that the stub can operate in all-stop mode.
4675 Request it explicitly. */
4676 putpkt ("QNonStop:0");
4677 getpkt (&rs
->buf
, 0);
4679 if (strcmp (rs
->buf
.data (), "OK") != 0)
4680 error (_("Remote refused setting all-stop mode with: %s"),
4684 /* Upload TSVs regardless of whether the target is running or not. The
4685 remote stub, such as GDBserver, may have some predefined or builtin
4686 TSVs, even if the target is not running. */
4687 if (get_trace_status (current_trace_status ()) != -1)
4689 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4691 upload_trace_state_variables (&uploaded_tsvs
);
4692 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4695 /* Check whether the target is running now. */
4697 getpkt (&rs
->buf
, 0);
4699 if (!target_is_non_stop_p ())
4701 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4704 error (_("The target is not running (try extended-remote?)"));
4706 /* We're connected, but not running. Drop out before we
4707 call start_remote. */
4708 rs
->starting_up
= 0;
4713 /* Save the reply for later. */
4714 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
4715 strcpy (wait_status
, rs
->buf
.data ());
4718 /* Fetch thread list. */
4719 target_update_thread_list ();
4721 /* Let the stub know that we want it to return the thread. */
4722 set_continue_thread (minus_one_ptid
);
4724 if (thread_count (this) == 0)
4726 /* Target has no concept of threads at all. GDB treats
4727 non-threaded target as single-threaded; add a main
4729 add_current_inferior_and_thread (wait_status
);
4733 /* We have thread information; select the thread the target
4734 says should be current. If we're reconnecting to a
4735 multi-threaded program, this will ideally be the thread
4736 that last reported an event before GDB disconnected. */
4737 ptid_t curr_thread
= get_current_thread (wait_status
);
4738 if (curr_thread
== null_ptid
)
4740 /* Odd... The target was able to list threads, but not
4741 tell us which thread was current (no "thread"
4742 register in T stop reply?). Just pick the first
4743 thread in the thread list then. */
4746 fprintf_unfiltered (gdb_stdlog
,
4747 "warning: couldn't determine remote "
4748 "current thread; picking first in list.\n");
4750 for (thread_info
*tp
: all_non_exited_threads (this,
4753 switch_to_thread (tp
);
4758 switch_to_thread (find_thread_ptid (this, curr_thread
));
4761 /* init_wait_for_inferior should be called before get_offsets in order
4762 to manage `inserted' flag in bp loc in a correct state.
4763 breakpoint_init_inferior, called from init_wait_for_inferior, set
4764 `inserted' flag to 0, while before breakpoint_re_set, called from
4765 start_remote, set `inserted' flag to 1. In the initialization of
4766 inferior, breakpoint_init_inferior should be called first, and then
4767 breakpoint_re_set can be called. If this order is broken, state of
4768 `inserted' flag is wrong, and cause some problems on breakpoint
4770 init_wait_for_inferior ();
4772 get_offsets (); /* Get text, data & bss offsets. */
4774 /* If we could not find a description using qXfer, and we know
4775 how to do it some other way, try again. This is not
4776 supported for non-stop; it could be, but it is tricky if
4777 there are no stopped threads when we connect. */
4778 if (remote_read_description_p (this)
4779 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4781 target_clear_description ();
4782 target_find_description ();
4785 /* Use the previously fetched status. */
4786 gdb_assert (wait_status
!= NULL
);
4787 strcpy (rs
->buf
.data (), wait_status
);
4788 rs
->cached_wait_status
= 1;
4790 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4794 /* Clear WFI global state. Do this before finding about new
4795 threads and inferiors, and setting the current inferior.
4796 Otherwise we would clear the proceed status of the current
4797 inferior when we want its stop_soon state to be preserved
4798 (see notice_new_inferior). */
4799 init_wait_for_inferior ();
4801 /* In non-stop, we will either get an "OK", meaning that there
4802 are no stopped threads at this time; or, a regular stop
4803 reply. In the latter case, there may be more than one thread
4804 stopped --- we pull them all out using the vStopped
4806 if (strcmp (rs
->buf
.data (), "OK") != 0)
4808 struct notif_client
*notif
= ¬if_client_stop
;
4810 /* remote_notif_get_pending_replies acks this one, and gets
4812 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4813 = remote_notif_parse (this, notif
, rs
->buf
.data ());
4814 remote_notif_get_pending_events (notif
);
4817 if (thread_count (this) == 0)
4820 error (_("The target is not running (try extended-remote?)"));
4822 /* We're connected, but not running. Drop out before we
4823 call start_remote. */
4824 rs
->starting_up
= 0;
4828 /* In non-stop mode, any cached wait status will be stored in
4829 the stop reply queue. */
4830 gdb_assert (wait_status
== NULL
);
4832 /* Report all signals during attach/startup. */
4835 /* If there are already stopped threads, mark them stopped and
4836 report their stops before giving the prompt to the user. */
4837 process_initial_stop_replies (from_tty
);
4839 if (target_can_async_p ())
4843 /* If we connected to a live target, do some additional setup. */
4844 if (target_has_execution
)
4846 if (symfile_objfile
) /* No use without a symbol-file. */
4847 remote_check_symbols ();
4850 /* Possibly the target has been engaged in a trace run started
4851 previously; find out where things are at. */
4852 if (get_trace_status (current_trace_status ()) != -1)
4854 struct uploaded_tp
*uploaded_tps
= NULL
;
4856 if (current_trace_status ()->running
)
4857 printf_filtered (_("Trace is already running on the target.\n"));
4859 upload_tracepoints (&uploaded_tps
);
4861 merge_uploaded_tracepoints (&uploaded_tps
);
4864 /* Possibly the target has been engaged in a btrace record started
4865 previously; find out where things are at. */
4866 remote_btrace_maybe_reopen ();
4868 /* The thread and inferior lists are now synchronized with the
4869 target, our symbols have been relocated, and we're merged the
4870 target's tracepoints with ours. We're done with basic start
4872 rs
->starting_up
= 0;
4874 /* Maybe breakpoints are global and need to be inserted now. */
4875 if (breakpoints_should_be_inserted_now ())
4876 insert_breakpoints ();
4880 remote_target::connection_string ()
4882 remote_state
*rs
= get_remote_state ();
4884 if (rs
->remote_desc
->name
!= NULL
)
4885 return rs
->remote_desc
->name
;
4890 /* Open a connection to a remote debugger.
4891 NAME is the filename used for communication. */
4894 remote_target::open (const char *name
, int from_tty
)
4896 open_1 (name
, from_tty
, 0);
4899 /* Open a connection to a remote debugger using the extended
4900 remote gdb protocol. NAME is the filename used for communication. */
4903 extended_remote_target::open (const char *name
, int from_tty
)
4905 open_1 (name
, from_tty
, 1 /*extended_p */);
4908 /* Reset all packets back to "unknown support". Called when opening a
4909 new connection to a remote target. */
4912 reset_all_packet_configs_support (void)
4916 for (i
= 0; i
< PACKET_MAX
; i
++)
4917 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4920 /* Initialize all packet configs. */
4923 init_all_packet_configs (void)
4927 for (i
= 0; i
< PACKET_MAX
; i
++)
4929 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4930 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4934 /* Symbol look-up. */
4937 remote_target::remote_check_symbols ()
4942 /* The remote side has no concept of inferiors that aren't running
4943 yet, it only knows about running processes. If we're connected
4944 but our current inferior is not running, we should not invite the
4945 remote target to request symbol lookups related to its
4946 (unrelated) current process. */
4947 if (!target_has_execution
)
4950 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4953 /* Make sure the remote is pointing at the right process. Note
4954 there's no way to select "no process". */
4955 set_general_process ();
4957 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4958 because we need both at the same time. */
4959 gdb::char_vector
msg (get_remote_packet_size ());
4960 gdb::char_vector
reply (get_remote_packet_size ());
4962 /* Invite target to request symbol lookups. */
4964 putpkt ("qSymbol::");
4966 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4968 while (startswith (reply
.data (), "qSymbol:"))
4970 struct bound_minimal_symbol sym
;
4973 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
4976 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
4977 if (sym
.minsym
== NULL
)
4978 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
4982 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4983 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4985 /* If this is a function address, return the start of code
4986 instead of any data function descriptor. */
4987 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4989 current_top_target ());
4991 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
4992 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4995 putpkt (msg
.data ());
5000 static struct serial
*
5001 remote_serial_open (const char *name
)
5003 static int udp_warning
= 0;
5005 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
5006 of in ser-tcp.c, because it is the remote protocol assuming that the
5007 serial connection is reliable and not the serial connection promising
5009 if (!udp_warning
&& startswith (name
, "udp:"))
5011 warning (_("The remote protocol may be unreliable over UDP.\n"
5012 "Some events may be lost, rendering further debugging "
5017 return serial_open (name
);
5020 /* Inform the target of our permission settings. The permission flags
5021 work without this, but if the target knows the settings, it can do
5022 a couple things. First, it can add its own check, to catch cases
5023 that somehow manage to get by the permissions checks in target
5024 methods. Second, if the target is wired to disallow particular
5025 settings (for instance, a system in the field that is not set up to
5026 be able to stop at a breakpoint), it can object to any unavailable
5030 remote_target::set_permissions ()
5032 struct remote_state
*rs
= get_remote_state ();
5034 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAllow:"
5035 "WriteReg:%x;WriteMem:%x;"
5036 "InsertBreak:%x;InsertTrace:%x;"
5037 "InsertFastTrace:%x;Stop:%x",
5038 may_write_registers
, may_write_memory
,
5039 may_insert_breakpoints
, may_insert_tracepoints
,
5040 may_insert_fast_tracepoints
, may_stop
);
5042 getpkt (&rs
->buf
, 0);
5044 /* If the target didn't like the packet, warn the user. Do not try
5045 to undo the user's settings, that would just be maddening. */
5046 if (strcmp (rs
->buf
.data (), "OK") != 0)
5047 warning (_("Remote refused setting permissions with: %s"),
5051 /* This type describes each known response to the qSupported
5053 struct protocol_feature
5055 /* The name of this protocol feature. */
5058 /* The default for this protocol feature. */
5059 enum packet_support default_support
;
5061 /* The function to call when this feature is reported, or after
5062 qSupported processing if the feature is not supported.
5063 The first argument points to this structure. The second
5064 argument indicates whether the packet requested support be
5065 enabled, disabled, or probed (or the default, if this function
5066 is being called at the end of processing and this feature was
5067 not reported). The third argument may be NULL; if not NULL, it
5068 is a NUL-terminated string taken from the packet following
5069 this feature's name and an equals sign. */
5070 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5071 enum packet_support
, const char *);
5073 /* The corresponding packet for this feature. Only used if
5074 FUNC is remote_supported_packet. */
5079 remote_supported_packet (remote_target
*remote
,
5080 const struct protocol_feature
*feature
,
5081 enum packet_support support
,
5082 const char *argument
)
5086 warning (_("Remote qSupported response supplied an unexpected value for"
5087 " \"%s\"."), feature
->name
);
5091 remote_protocol_packets
[feature
->packet
].support
= support
;
5095 remote_target::remote_packet_size (const protocol_feature
*feature
,
5096 enum packet_support support
, const char *value
)
5098 struct remote_state
*rs
= get_remote_state ();
5103 if (support
!= PACKET_ENABLE
)
5106 if (value
== NULL
|| *value
== '\0')
5108 warning (_("Remote target reported \"%s\" without a size."),
5114 packet_size
= strtol (value
, &value_end
, 16);
5115 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5117 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5118 feature
->name
, value
);
5122 /* Record the new maximum packet size. */
5123 rs
->explicit_packet_size
= packet_size
;
5127 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5128 enum packet_support support
, const char *value
)
5130 remote
->remote_packet_size (feature
, support
, value
);
5133 static const struct protocol_feature remote_protocol_features
[] = {
5134 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5135 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5136 PACKET_qXfer_auxv
},
5137 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5138 PACKET_qXfer_exec_file
},
5139 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5140 PACKET_qXfer_features
},
5141 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5142 PACKET_qXfer_libraries
},
5143 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5144 PACKET_qXfer_libraries_svr4
},
5145 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5146 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5147 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5148 PACKET_qXfer_memory_map
},
5149 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5150 PACKET_qXfer_osdata
},
5151 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5152 PACKET_qXfer_threads
},
5153 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5154 PACKET_qXfer_traceframe_info
},
5155 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5156 PACKET_QPassSignals
},
5157 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5158 PACKET_QCatchSyscalls
},
5159 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5160 PACKET_QProgramSignals
},
5161 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5162 PACKET_QSetWorkingDir
},
5163 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5164 PACKET_QStartupWithShell
},
5165 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5166 PACKET_QEnvironmentHexEncoded
},
5167 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5168 PACKET_QEnvironmentReset
},
5169 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5170 PACKET_QEnvironmentUnset
},
5171 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5172 PACKET_QStartNoAckMode
},
5173 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5174 PACKET_multiprocess_feature
},
5175 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5176 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5177 PACKET_qXfer_siginfo_read
},
5178 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5179 PACKET_qXfer_siginfo_write
},
5180 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5181 PACKET_ConditionalTracepoints
},
5182 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5183 PACKET_ConditionalBreakpoints
},
5184 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5185 PACKET_BreakpointCommands
},
5186 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5187 PACKET_FastTracepoints
},
5188 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5189 PACKET_StaticTracepoints
},
5190 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5191 PACKET_InstallInTrace
},
5192 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5193 PACKET_DisconnectedTracing_feature
},
5194 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5196 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5198 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5199 PACKET_TracepointSource
},
5200 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5202 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5203 PACKET_EnableDisableTracepoints_feature
},
5204 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5205 PACKET_qXfer_fdpic
},
5206 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5208 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5209 PACKET_QDisableRandomization
},
5210 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5211 { "QTBuffer:size", PACKET_DISABLE
,
5212 remote_supported_packet
, PACKET_QTBuffer_size
},
5213 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5214 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5215 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5216 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5217 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5218 PACKET_qXfer_btrace
},
5219 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5220 PACKET_qXfer_btrace_conf
},
5221 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5222 PACKET_Qbtrace_conf_bts_size
},
5223 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5224 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5225 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5226 PACKET_fork_event_feature
},
5227 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5228 PACKET_vfork_event_feature
},
5229 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5230 PACKET_exec_event_feature
},
5231 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5232 PACKET_Qbtrace_conf_pt_size
},
5233 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5234 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5235 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5238 static char *remote_support_xml
;
5240 /* Register string appended to "xmlRegisters=" in qSupported query. */
5243 register_remote_support_xml (const char *xml
)
5245 #if defined(HAVE_LIBEXPAT)
5246 if (remote_support_xml
== NULL
)
5247 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5250 char *copy
= xstrdup (remote_support_xml
+ 13);
5252 char *p
= strtok_r (copy
, ",", &saveptr
);
5256 if (strcmp (p
, xml
) == 0)
5263 while ((p
= strtok_r (NULL
, ",", &saveptr
)) != NULL
);
5266 remote_support_xml
= reconcat (remote_support_xml
,
5267 remote_support_xml
, ",", xml
,
5274 remote_query_supported_append (std::string
*msg
, const char *append
)
5278 msg
->append (append
);
5282 remote_target::remote_query_supported ()
5284 struct remote_state
*rs
= get_remote_state ();
5287 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5289 /* The packet support flags are handled differently for this packet
5290 than for most others. We treat an error, a disabled packet, and
5291 an empty response identically: any features which must be reported
5292 to be used will be automatically disabled. An empty buffer
5293 accomplishes this, since that is also the representation for a list
5294 containing no features. */
5297 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5301 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5302 remote_query_supported_append (&q
, "multiprocess+");
5304 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5305 remote_query_supported_append (&q
, "swbreak+");
5306 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5307 remote_query_supported_append (&q
, "hwbreak+");
5309 remote_query_supported_append (&q
, "qRelocInsn+");
5311 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5312 != AUTO_BOOLEAN_FALSE
)
5313 remote_query_supported_append (&q
, "fork-events+");
5314 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5315 != AUTO_BOOLEAN_FALSE
)
5316 remote_query_supported_append (&q
, "vfork-events+");
5317 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5318 != AUTO_BOOLEAN_FALSE
)
5319 remote_query_supported_append (&q
, "exec-events+");
5321 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5322 remote_query_supported_append (&q
, "vContSupported+");
5324 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5325 remote_query_supported_append (&q
, "QThreadEvents+");
5327 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5328 remote_query_supported_append (&q
, "no-resumed+");
5330 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5331 the qSupported:xmlRegisters=i386 handling. */
5332 if (remote_support_xml
!= NULL
5333 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5334 remote_query_supported_append (&q
, remote_support_xml
);
5336 q
= "qSupported:" + q
;
5337 putpkt (q
.c_str ());
5339 getpkt (&rs
->buf
, 0);
5341 /* If an error occured, warn, but do not return - just reset the
5342 buffer to empty and go on to disable features. */
5343 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5346 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
5351 memset (seen
, 0, sizeof (seen
));
5353 next
= rs
->buf
.data ();
5356 enum packet_support is_supported
;
5357 char *p
, *end
, *name_end
, *value
;
5359 /* First separate out this item from the rest of the packet. If
5360 there's another item after this, we overwrite the separator
5361 (terminated strings are much easier to work with). */
5363 end
= strchr (p
, ';');
5366 end
= p
+ strlen (p
);
5376 warning (_("empty item in \"qSupported\" response"));
5381 name_end
= strchr (p
, '=');
5384 /* This is a name=value entry. */
5385 is_supported
= PACKET_ENABLE
;
5386 value
= name_end
+ 1;
5395 is_supported
= PACKET_ENABLE
;
5399 is_supported
= PACKET_DISABLE
;
5403 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5407 warning (_("unrecognized item \"%s\" "
5408 "in \"qSupported\" response"), p
);
5414 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5415 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5417 const struct protocol_feature
*feature
;
5420 feature
= &remote_protocol_features
[i
];
5421 feature
->func (this, feature
, is_supported
, value
);
5426 /* If we increased the packet size, make sure to increase the global
5427 buffer size also. We delay this until after parsing the entire
5428 qSupported packet, because this is the same buffer we were
5430 if (rs
->buf
.size () < rs
->explicit_packet_size
)
5431 rs
->buf
.resize (rs
->explicit_packet_size
);
5433 /* Handle the defaults for unmentioned features. */
5434 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5437 const struct protocol_feature
*feature
;
5439 feature
= &remote_protocol_features
[i
];
5440 feature
->func (this, feature
, feature
->default_support
, NULL
);
5444 /* Serial QUIT handler for the remote serial descriptor.
5446 Defers handling a Ctrl-C until we're done with the current
5447 command/response packet sequence, unless:
5449 - We're setting up the connection. Don't send a remote interrupt
5450 request, as we're not fully synced yet. Quit immediately
5453 - The target has been resumed in the foreground
5454 (target_terminal::is_ours is false) with a synchronous resume
5455 packet, and we're blocked waiting for the stop reply, thus a
5456 Ctrl-C should be immediately sent to the target.
5458 - We get a second Ctrl-C while still within the same serial read or
5459 write. In that case the serial is seemingly wedged --- offer to
5462 - We see a second Ctrl-C without target response, after having
5463 previously interrupted the target. In that case the target/stub
5464 is probably wedged --- offer to quit/disconnect.
5468 remote_target::remote_serial_quit_handler ()
5470 struct remote_state
*rs
= get_remote_state ();
5472 if (check_quit_flag ())
5474 /* If we're starting up, we're not fully synced yet. Quit
5476 if (rs
->starting_up
)
5478 else if (rs
->got_ctrlc_during_io
)
5480 if (query (_("The target is not responding to GDB commands.\n"
5481 "Stop debugging it? ")))
5482 remote_unpush_and_throw (this);
5484 /* If ^C has already been sent once, offer to disconnect. */
5485 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5487 /* All-stop protocol, and blocked waiting for stop reply. Send
5488 an interrupt request. */
5489 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5490 target_interrupt ();
5492 rs
->got_ctrlc_during_io
= 1;
5496 /* The remote_target that is current while the quit handler is
5497 overridden with remote_serial_quit_handler. */
5498 static remote_target
*curr_quit_handler_target
;
5501 remote_serial_quit_handler ()
5503 curr_quit_handler_target
->remote_serial_quit_handler ();
5506 /* Remove the remote target from the target stack of each inferior
5507 that is using it. Upper targets depend on it so remove them
5511 remote_unpush_target (remote_target
*target
)
5513 /* We have to unpush the target from all inferiors, even those that
5515 scoped_restore_current_inferior restore_current_inferior
;
5517 for (inferior
*inf
: all_inferiors (target
))
5519 switch_to_inferior_no_thread (inf
);
5520 pop_all_targets_at_and_above (process_stratum
);
5521 generic_mourn_inferior ();
5526 remote_unpush_and_throw (remote_target
*target
)
5528 remote_unpush_target (target
);
5529 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5533 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5535 remote_target
*curr_remote
= get_current_remote_target ();
5538 error (_("To open a remote debug connection, you need to specify what\n"
5539 "serial device is attached to the remote system\n"
5540 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5542 /* If we're connected to a running target, target_preopen will kill it.
5543 Ask this question first, before target_preopen has a chance to kill
5545 if (curr_remote
!= NULL
&& !target_has_execution
)
5548 && !query (_("Already connected to a remote target. Disconnect? ")))
5549 error (_("Still connected."));
5552 /* Here the possibly existing remote target gets unpushed. */
5553 target_preopen (from_tty
);
5555 remote_fileio_reset ();
5556 reopen_exec_file ();
5559 remote_target
*remote
5560 = (extended_p
? new extended_remote_target () : new remote_target ());
5561 target_ops_up
target_holder (remote
);
5563 remote_state
*rs
= remote
->get_remote_state ();
5565 /* See FIXME above. */
5566 if (!target_async_permitted
)
5567 rs
->wait_forever_enabled_p
= 1;
5569 rs
->remote_desc
= remote_serial_open (name
);
5570 if (!rs
->remote_desc
)
5571 perror_with_name (name
);
5573 if (baud_rate
!= -1)
5575 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5577 /* The requested speed could not be set. Error out to
5578 top level after closing remote_desc. Take care to
5579 set remote_desc to NULL to avoid closing remote_desc
5581 serial_close (rs
->remote_desc
);
5582 rs
->remote_desc
= NULL
;
5583 perror_with_name (name
);
5587 serial_setparity (rs
->remote_desc
, serial_parity
);
5588 serial_raw (rs
->remote_desc
);
5590 /* If there is something sitting in the buffer we might take it as a
5591 response to a command, which would be bad. */
5592 serial_flush_input (rs
->remote_desc
);
5596 puts_filtered ("Remote debugging using ");
5597 puts_filtered (name
);
5598 puts_filtered ("\n");
5601 /* Switch to using the remote target now. */
5602 push_target (std::move (target_holder
));
5604 /* Register extra event sources in the event loop. */
5605 rs
->remote_async_inferior_event_token
5606 = create_async_event_handler (remote_async_inferior_event_handler
,
5608 rs
->notif_state
= remote_notif_state_allocate (remote
);
5610 /* Reset the target state; these things will be queried either by
5611 remote_query_supported or as they are needed. */
5612 reset_all_packet_configs_support ();
5613 rs
->cached_wait_status
= 0;
5614 rs
->explicit_packet_size
= 0;
5616 rs
->extended
= extended_p
;
5617 rs
->waiting_for_stop_reply
= 0;
5618 rs
->ctrlc_pending_p
= 0;
5619 rs
->got_ctrlc_during_io
= 0;
5621 rs
->general_thread
= not_sent_ptid
;
5622 rs
->continue_thread
= not_sent_ptid
;
5623 rs
->remote_traceframe_number
= -1;
5625 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5627 /* Probe for ability to use "ThreadInfo" query, as required. */
5628 rs
->use_threadinfo_query
= 1;
5629 rs
->use_threadextra_query
= 1;
5631 rs
->readahead_cache
.invalidate ();
5633 if (target_async_permitted
)
5635 /* FIXME: cagney/1999-09-23: During the initial connection it is
5636 assumed that the target is already ready and able to respond to
5637 requests. Unfortunately remote_start_remote() eventually calls
5638 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5639 around this. Eventually a mechanism that allows
5640 wait_for_inferior() to expect/get timeouts will be
5642 rs
->wait_forever_enabled_p
= 0;
5645 /* First delete any symbols previously loaded from shared libraries. */
5646 no_shared_libraries (NULL
, 0);
5648 /* Start the remote connection. If error() or QUIT, discard this
5649 target (we'd otherwise be in an inconsistent state) and then
5650 propogate the error on up the exception chain. This ensures that
5651 the caller doesn't stumble along blindly assuming that the
5652 function succeeded. The CLI doesn't have this problem but other
5653 UI's, such as MI do.
5655 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5656 this function should return an error indication letting the
5657 caller restore the previous state. Unfortunately the command
5658 ``target remote'' is directly wired to this function making that
5659 impossible. On a positive note, the CLI side of this problem has
5660 been fixed - the function set_cmd_context() makes it possible for
5661 all the ``target ....'' commands to share a common callback
5662 function. See cli-dump.c. */
5667 remote
->start_remote (from_tty
, extended_p
);
5669 catch (const gdb_exception
&ex
)
5671 /* Pop the partially set up target - unless something else did
5672 already before throwing the exception. */
5673 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5674 remote_unpush_target (remote
);
5679 remote_btrace_reset (rs
);
5681 if (target_async_permitted
)
5682 rs
->wait_forever_enabled_p
= 1;
5685 /* Detach the specified process. */
5688 remote_target::remote_detach_pid (int pid
)
5690 struct remote_state
*rs
= get_remote_state ();
5692 /* This should not be necessary, but the handling for D;PID in
5693 GDBserver versions prior to 8.2 incorrectly assumes that the
5694 selected process points to the same process we're detaching,
5695 leading to misbehavior (and possibly GDBserver crashing) when it
5696 does not. Since it's easy and cheap, work around it by forcing
5697 GDBserver to select GDB's current process. */
5698 set_general_process ();
5700 if (remote_multi_process_p (rs
))
5701 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "D;%x", pid
);
5703 strcpy (rs
->buf
.data (), "D");
5706 getpkt (&rs
->buf
, 0);
5708 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5710 else if (rs
->buf
[0] == '\0')
5711 error (_("Remote doesn't know how to detach"));
5713 error (_("Can't detach process."));
5716 /* This detaches a program to which we previously attached, using
5717 inferior_ptid to identify the process. After this is done, GDB
5718 can be used to debug some other program. We better not have left
5719 any breakpoints in the target program or it'll die when it hits
5723 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5725 int pid
= inferior_ptid
.pid ();
5726 struct remote_state
*rs
= get_remote_state ();
5729 if (!target_has_execution
)
5730 error (_("No process to detach from."));
5732 target_announce_detach (from_tty
);
5734 /* Tell the remote target to detach. */
5735 remote_detach_pid (pid
);
5737 /* Exit only if this is the only active inferior. */
5738 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors (this) == 1)
5739 puts_filtered (_("Ending remote debugging.\n"));
5741 thread_info
*tp
= find_thread_ptid (this, inferior_ptid
);
5743 /* Check to see if we are detaching a fork parent. Note that if we
5744 are detaching a fork child, tp == NULL. */
5745 is_fork_parent
= (tp
!= NULL
5746 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5748 /* If doing detach-on-fork, we don't mourn, because that will delete
5749 breakpoints that should be available for the followed inferior. */
5750 if (!is_fork_parent
)
5752 /* Save the pid as a string before mourning, since that will
5753 unpush the remote target, and we need the string after. */
5754 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5756 target_mourn_inferior (inferior_ptid
);
5757 if (print_inferior_events
)
5758 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5759 inf
->num
, infpid
.c_str ());
5763 inferior_ptid
= null_ptid
;
5764 detach_inferior (current_inferior ());
5769 remote_target::detach (inferior
*inf
, int from_tty
)
5771 remote_detach_1 (inf
, from_tty
);
5775 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5777 remote_detach_1 (inf
, from_tty
);
5780 /* Target follow-fork function for remote targets. On entry, and
5781 at return, the current inferior is the fork parent.
5783 Note that although this is currently only used for extended-remote,
5784 it is named remote_follow_fork in anticipation of using it for the
5785 remote target as well. */
5788 remote_target::follow_fork (bool follow_child
, bool detach_fork
)
5790 struct remote_state
*rs
= get_remote_state ();
5791 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5793 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5794 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5796 /* When following the parent and detaching the child, we detach
5797 the child here. For the case of following the child and
5798 detaching the parent, the detach is done in the target-
5799 independent follow fork code in infrun.c. We can't use
5800 target_detach when detaching an unfollowed child because
5801 the client side doesn't know anything about the child. */
5802 if (detach_fork
&& !follow_child
)
5804 /* Detach the fork child. */
5808 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5809 child_pid
= child_ptid
.pid ();
5811 remote_detach_pid (child_pid
);
5818 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5819 in the program space of the new inferior. On entry and at return the
5820 current inferior is the exec'ing inferior. INF is the new exec'd
5821 inferior, which may be the same as the exec'ing inferior unless
5822 follow-exec-mode is "new". */
5825 remote_target::follow_exec (struct inferior
*inf
, const char *execd_pathname
)
5827 /* We know that this is a target file name, so if it has the "target:"
5828 prefix we strip it off before saving it in the program space. */
5829 if (is_target_filename (execd_pathname
))
5830 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5832 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5835 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5838 remote_target::disconnect (const char *args
, int from_tty
)
5841 error (_("Argument given to \"disconnect\" when remotely debugging."));
5843 /* Make sure we unpush even the extended remote targets. Calling
5844 target_mourn_inferior won't unpush, and
5845 remote_target::mourn_inferior won't unpush if there is more than
5846 one inferior left. */
5847 remote_unpush_target (this);
5850 puts_filtered ("Ending remote debugging.\n");
5853 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5854 be chatty about it. */
5857 extended_remote_target::attach (const char *args
, int from_tty
)
5859 struct remote_state
*rs
= get_remote_state ();
5861 char *wait_status
= NULL
;
5863 pid
= parse_pid_to_attach (args
);
5865 /* Remote PID can be freely equal to getpid, do not check it here the same
5866 way as in other targets. */
5868 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5869 error (_("This target does not support attaching to a process"));
5873 const char *exec_file
= get_exec_file (0);
5876 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5877 target_pid_to_str (ptid_t (pid
)).c_str ());
5879 printf_unfiltered (_("Attaching to %s\n"),
5880 target_pid_to_str (ptid_t (pid
)).c_str ());
5883 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vAttach;%x", pid
);
5885 getpkt (&rs
->buf
, 0);
5887 switch (packet_ok (rs
->buf
,
5888 &remote_protocol_packets
[PACKET_vAttach
]))
5891 if (!target_is_non_stop_p ())
5893 /* Save the reply for later. */
5894 wait_status
= (char *) alloca (strlen (rs
->buf
.data ()) + 1);
5895 strcpy (wait_status
, rs
->buf
.data ());
5897 else if (strcmp (rs
->buf
.data (), "OK") != 0)
5898 error (_("Attaching to %s failed with: %s"),
5899 target_pid_to_str (ptid_t (pid
)).c_str (),
5902 case PACKET_UNKNOWN
:
5903 error (_("This target does not support attaching to a process"));
5905 error (_("Attaching to %s failed"),
5906 target_pid_to_str (ptid_t (pid
)).c_str ());
5909 set_current_inferior (remote_add_inferior (false, pid
, 1, 0));
5911 inferior_ptid
= ptid_t (pid
);
5913 if (target_is_non_stop_p ())
5915 struct thread_info
*thread
;
5917 /* Get list of threads. */
5918 update_thread_list ();
5920 thread
= first_thread_of_inferior (current_inferior ());
5922 inferior_ptid
= thread
->ptid
;
5924 inferior_ptid
= ptid_t (pid
);
5926 /* Invalidate our notion of the remote current thread. */
5927 record_currthread (rs
, minus_one_ptid
);
5931 /* Now, if we have thread information, update inferior_ptid. */
5932 inferior_ptid
= remote_current_thread (inferior_ptid
);
5934 /* Add the main thread to the thread list. */
5935 thread_info
*thr
= add_thread_silent (this, inferior_ptid
);
5936 /* Don't consider the thread stopped until we've processed the
5937 saved stop reply. */
5938 set_executing (this, thr
->ptid
, true);
5941 /* Next, if the target can specify a description, read it. We do
5942 this before anything involving memory or registers. */
5943 target_find_description ();
5945 if (!target_is_non_stop_p ())
5947 /* Use the previously fetched status. */
5948 gdb_assert (wait_status
!= NULL
);
5950 if (target_can_async_p ())
5952 struct notif_event
*reply
5953 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
5955 push_stop_reply ((struct stop_reply
*) reply
);
5961 gdb_assert (wait_status
!= NULL
);
5962 strcpy (rs
->buf
.data (), wait_status
);
5963 rs
->cached_wait_status
= 1;
5967 gdb_assert (wait_status
== NULL
);
5970 /* Implementation of the to_post_attach method. */
5973 extended_remote_target::post_attach (int pid
)
5975 /* Get text, data & bss offsets. */
5978 /* In certain cases GDB might not have had the chance to start
5979 symbol lookup up until now. This could happen if the debugged
5980 binary is not using shared libraries, the vsyscall page is not
5981 present (on Linux) and the binary itself hadn't changed since the
5982 debugging process was started. */
5983 if (symfile_objfile
!= NULL
)
5984 remote_check_symbols();
5988 /* Check for the availability of vCont. This function should also check
5992 remote_target::remote_vcont_probe ()
5994 remote_state
*rs
= get_remote_state ();
5997 strcpy (rs
->buf
.data (), "vCont?");
5999 getpkt (&rs
->buf
, 0);
6000 buf
= rs
->buf
.data ();
6002 /* Make sure that the features we assume are supported. */
6003 if (startswith (buf
, "vCont"))
6006 int support_c
, support_C
;
6008 rs
->supports_vCont
.s
= 0;
6009 rs
->supports_vCont
.S
= 0;
6012 rs
->supports_vCont
.t
= 0;
6013 rs
->supports_vCont
.r
= 0;
6014 while (p
&& *p
== ';')
6017 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6018 rs
->supports_vCont
.s
= 1;
6019 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6020 rs
->supports_vCont
.S
= 1;
6021 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6023 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6025 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6026 rs
->supports_vCont
.t
= 1;
6027 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
6028 rs
->supports_vCont
.r
= 1;
6030 p
= strchr (p
, ';');
6033 /* If c, and C are not all supported, we can't use vCont. Clearing
6034 BUF will make packet_ok disable the packet. */
6035 if (!support_c
|| !support_C
)
6039 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCont
]);
6040 rs
->supports_vCont_probed
= true;
6043 /* Helper function for building "vCont" resumptions. Write a
6044 resumption to P. ENDP points to one-passed-the-end of the buffer
6045 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
6046 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
6047 resumed thread should be single-stepped and/or signalled. If PTID
6048 equals minus_one_ptid, then all threads are resumed; if PTID
6049 represents a process, then all threads of the process are resumed;
6050 the thread to be stepped and/or signalled is given in the global
6054 remote_target::append_resumption (char *p
, char *endp
,
6055 ptid_t ptid
, int step
, gdb_signal siggnal
)
6057 struct remote_state
*rs
= get_remote_state ();
6059 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6060 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6062 /* GDB is willing to range step. */
6063 && use_range_stepping
6064 /* Target supports range stepping. */
6065 && rs
->supports_vCont
.r
6066 /* We don't currently support range stepping multiple
6067 threads with a wildcard (though the protocol allows it,
6068 so stubs shouldn't make an active effort to forbid
6070 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6072 struct thread_info
*tp
;
6074 if (ptid
== minus_one_ptid
)
6076 /* If we don't know about the target thread's tid, then
6077 we're resuming magic_null_ptid (see caller). */
6078 tp
= find_thread_ptid (this, magic_null_ptid
);
6081 tp
= find_thread_ptid (this, ptid
);
6082 gdb_assert (tp
!= NULL
);
6084 if (tp
->control
.may_range_step
)
6086 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6088 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6089 phex_nz (tp
->control
.step_range_start
,
6091 phex_nz (tp
->control
.step_range_end
,
6095 p
+= xsnprintf (p
, endp
- p
, ";s");
6098 p
+= xsnprintf (p
, endp
- p
, ";s");
6099 else if (siggnal
!= GDB_SIGNAL_0
)
6100 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6102 p
+= xsnprintf (p
, endp
- p
, ";c");
6104 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6108 /* All (-1) threads of process. */
6109 nptid
= ptid_t (ptid
.pid (), -1, 0);
6111 p
+= xsnprintf (p
, endp
- p
, ":");
6112 p
= write_ptid (p
, endp
, nptid
);
6114 else if (ptid
!= minus_one_ptid
)
6116 p
+= xsnprintf (p
, endp
- p
, ":");
6117 p
= write_ptid (p
, endp
, ptid
);
6123 /* Clear the thread's private info on resume. */
6126 resume_clear_thread_private_info (struct thread_info
*thread
)
6128 if (thread
->priv
!= NULL
)
6130 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6132 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6133 priv
->watch_data_address
= 0;
6137 /* Append a vCont continue-with-signal action for threads that have a
6138 non-zero stop signal. */
6141 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6144 for (thread_info
*thread
: all_non_exited_threads (this, ptid
))
6145 if (inferior_ptid
!= thread
->ptid
6146 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
6148 p
= append_resumption (p
, endp
, thread
->ptid
,
6149 0, thread
->suspend
.stop_signal
);
6150 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
6151 resume_clear_thread_private_info (thread
);
6157 /* Set the target running, using the packets that use Hc
6161 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6164 struct remote_state
*rs
= get_remote_state ();
6167 rs
->last_sent_signal
= siggnal
;
6168 rs
->last_sent_step
= step
;
6170 /* The c/s/C/S resume packets use Hc, so set the continue
6172 if (ptid
== minus_one_ptid
)
6173 set_continue_thread (any_thread_ptid
);
6175 set_continue_thread (ptid
);
6177 for (thread_info
*thread
: all_non_exited_threads (this))
6178 resume_clear_thread_private_info (thread
);
6180 buf
= rs
->buf
.data ();
6181 if (::execution_direction
== EXEC_REVERSE
)
6183 /* We don't pass signals to the target in reverse exec mode. */
6184 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6185 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6188 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6189 error (_("Remote reverse-step not supported."));
6190 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6191 error (_("Remote reverse-continue not supported."));
6193 strcpy (buf
, step
? "bs" : "bc");
6195 else if (siggnal
!= GDB_SIGNAL_0
)
6197 buf
[0] = step
? 'S' : 'C';
6198 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6199 buf
[2] = tohex (((int) siggnal
) & 0xf);
6203 strcpy (buf
, step
? "s" : "c");
6208 /* Resume the remote inferior by using a "vCont" packet. The thread
6209 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6210 resumed thread should be single-stepped and/or signalled. If PTID
6211 equals minus_one_ptid, then all threads are resumed; the thread to
6212 be stepped and/or signalled is given in the global INFERIOR_PTID.
6213 This function returns non-zero iff it resumes the inferior.
6215 This function issues a strict subset of all possible vCont commands
6219 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6220 enum gdb_signal siggnal
)
6222 struct remote_state
*rs
= get_remote_state ();
6226 /* No reverse execution actions defined for vCont. */
6227 if (::execution_direction
== EXEC_REVERSE
)
6230 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6231 remote_vcont_probe ();
6233 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6236 p
= rs
->buf
.data ();
6237 endp
= p
+ get_remote_packet_size ();
6239 /* If we could generate a wider range of packets, we'd have to worry
6240 about overflowing BUF. Should there be a generic
6241 "multi-part-packet" packet? */
6243 p
+= xsnprintf (p
, endp
- p
, "vCont");
6245 if (ptid
== magic_null_ptid
)
6247 /* MAGIC_NULL_PTID means that we don't have any active threads,
6248 so we don't have any TID numbers the inferior will
6249 understand. Make sure to only send forms that do not specify
6251 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6253 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6255 /* Resume all threads (of all processes, or of a single
6256 process), with preference for INFERIOR_PTID. This assumes
6257 inferior_ptid belongs to the set of all threads we are about
6259 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6261 /* Step inferior_ptid, with or without signal. */
6262 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6265 /* Also pass down any pending signaled resumption for other
6266 threads not the current. */
6267 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6269 /* And continue others without a signal. */
6270 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6274 /* Scheduler locking; resume only PTID. */
6275 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6278 gdb_assert (strlen (rs
->buf
.data ()) < get_remote_packet_size ());
6281 if (target_is_non_stop_p ())
6283 /* In non-stop, the stub replies to vCont with "OK". The stop
6284 reply will be reported asynchronously by means of a `%Stop'
6286 getpkt (&rs
->buf
, 0);
6287 if (strcmp (rs
->buf
.data (), "OK") != 0)
6288 error (_("Unexpected vCont reply in non-stop mode: %s"),
6295 /* Tell the remote machine to resume. */
6298 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6300 struct remote_state
*rs
= get_remote_state ();
6302 /* When connected in non-stop mode, the core resumes threads
6303 individually. Resuming remote threads directly in target_resume
6304 would thus result in sending one packet per thread. Instead, to
6305 minimize roundtrip latency, here we just store the resume
6306 request; the actual remote resumption will be done in
6307 target_commit_resume / remote_commit_resume, where we'll be able
6308 to do vCont action coalescing. */
6309 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6311 remote_thread_info
*remote_thr
;
6313 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6314 remote_thr
= get_remote_thread_info (this, inferior_ptid
);
6316 remote_thr
= get_remote_thread_info (this, ptid
);
6318 remote_thr
->last_resume_step
= step
;
6319 remote_thr
->last_resume_sig
= siggnal
;
6323 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6324 (explained in remote-notif.c:handle_notification) so
6325 remote_notif_process is not called. We need find a place where
6326 it is safe to start a 'vNotif' sequence. It is good to do it
6327 before resuming inferior, because inferior was stopped and no RSP
6328 traffic at that moment. */
6329 if (!target_is_non_stop_p ())
6330 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6332 rs
->last_resume_exec_dir
= ::execution_direction
;
6334 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6335 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6336 remote_resume_with_hc (ptid
, step
, siggnal
);
6338 /* We are about to start executing the inferior, let's register it
6339 with the event loop. NOTE: this is the one place where all the
6340 execution commands end up. We could alternatively do this in each
6341 of the execution commands in infcmd.c. */
6342 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6343 into infcmd.c in order to allow inferior function calls to work
6344 NOT asynchronously. */
6345 if (target_can_async_p ())
6348 /* We've just told the target to resume. The remote server will
6349 wait for the inferior to stop, and then send a stop reply. In
6350 the mean time, we can't start another command/query ourselves
6351 because the stub wouldn't be ready to process it. This applies
6352 only to the base all-stop protocol, however. In non-stop (which
6353 only supports vCont), the stub replies with an "OK", and is
6354 immediate able to process further serial input. */
6355 if (!target_is_non_stop_p ())
6356 rs
->waiting_for_stop_reply
= 1;
6359 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6361 /* Private per-inferior info for target remote processes. */
6363 struct remote_inferior
: public private_inferior
6365 /* Whether we can send a wildcard vCont for this process. */
6366 bool may_wildcard_vcont
= true;
6369 /* Get the remote private inferior data associated to INF. */
6371 static remote_inferior
*
6372 get_remote_inferior (inferior
*inf
)
6374 if (inf
->priv
== NULL
)
6375 inf
->priv
.reset (new remote_inferior
);
6377 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6380 /* Class used to track the construction of a vCont packet in the
6381 outgoing packet buffer. This is used to send multiple vCont
6382 packets if we have more actions than would fit a single packet. */
6387 explicit vcont_builder (remote_target
*remote
)
6394 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6399 /* The remote target. */
6400 remote_target
*m_remote
;
6402 /* Pointer to the first action. P points here if no action has been
6404 char *m_first_action
;
6406 /* Where the next action will be appended. */
6409 /* The end of the buffer. Must never write past this. */
6413 /* Prepare the outgoing buffer for a new vCont packet. */
6416 vcont_builder::restart ()
6418 struct remote_state
*rs
= m_remote
->get_remote_state ();
6420 m_p
= rs
->buf
.data ();
6421 m_endp
= m_p
+ m_remote
->get_remote_packet_size ();
6422 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6423 m_first_action
= m_p
;
6426 /* If the vCont packet being built has any action, send it to the
6430 vcont_builder::flush ()
6432 struct remote_state
*rs
;
6434 if (m_p
== m_first_action
)
6437 rs
= m_remote
->get_remote_state ();
6438 m_remote
->putpkt (rs
->buf
);
6439 m_remote
->getpkt (&rs
->buf
, 0);
6440 if (strcmp (rs
->buf
.data (), "OK") != 0)
6441 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
.data ());
6444 /* The largest action is range-stepping, with its two addresses. This
6445 is more than sufficient. If a new, bigger action is created, it'll
6446 quickly trigger a failed assertion in append_resumption (and we'll
6448 #define MAX_ACTION_SIZE 200
6450 /* Append a new vCont action in the outgoing packet being built. If
6451 the action doesn't fit the packet along with previous actions, push
6452 what we've got so far to the remote end and start over a new vCont
6453 packet (with the new action). */
6456 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6458 char buf
[MAX_ACTION_SIZE
+ 1];
6460 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6461 ptid
, step
, siggnal
);
6463 /* Check whether this new action would fit in the vCont packet along
6464 with previous actions. If not, send what we've got so far and
6465 start a new vCont packet. */
6466 size_t rsize
= endp
- buf
;
6467 if (rsize
> m_endp
- m_p
)
6472 /* Should now fit. */
6473 gdb_assert (rsize
<= m_endp
- m_p
);
6476 memcpy (m_p
, buf
, rsize
);
6481 /* to_commit_resume implementation. */
6484 remote_target::commit_resume ()
6486 int any_process_wildcard
;
6487 int may_global_wildcard_vcont
;
6489 /* If connected in all-stop mode, we'd send the remote resume
6490 request directly from remote_resume. Likewise if
6491 reverse-debugging, as there are no defined vCont actions for
6492 reverse execution. */
6493 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6496 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6497 instead of resuming all threads of each process individually.
6498 However, if any thread of a process must remain halted, we can't
6499 send wildcard resumes and must send one action per thread.
6501 Care must be taken to not resume threads/processes the server
6502 side already told us are stopped, but the core doesn't know about
6503 yet, because the events are still in the vStopped notification
6506 #1 => vCont s:p1.1;c
6508 #3 <= %Stopped T05 p1.1
6513 #8 (infrun handles the stop for p1.1 and continues stepping)
6514 #9 => vCont s:p1.1;c
6516 The last vCont above would resume thread p1.2 by mistake, because
6517 the server has no idea that the event for p1.2 had not been
6520 The server side must similarly ignore resume actions for the
6521 thread that has a pending %Stopped notification (and any other
6522 threads with events pending), until GDB acks the notification
6523 with vStopped. Otherwise, e.g., the following case is
6526 #1 => g (or any other packet)
6528 #3 <= %Stopped T05 p1.2
6529 #4 => vCont s:p1.1;c
6532 Above, the server must not resume thread p1.2. GDB can't know
6533 that p1.2 stopped until it acks the %Stopped notification, and
6534 since from GDB's perspective all threads should be running, it
6537 Finally, special care must also be given to handling fork/vfork
6538 events. A (v)fork event actually tells us that two processes
6539 stopped -- the parent and the child. Until we follow the fork,
6540 we must not resume the child. Therefore, if we have a pending
6541 fork follow, we must not send a global wildcard resume action
6542 (vCont;c). We can still send process-wide wildcards though. */
6544 /* Start by assuming a global wildcard (vCont;c) is possible. */
6545 may_global_wildcard_vcont
= 1;
6547 /* And assume every process is individually wildcard-able too. */
6548 for (inferior
*inf
: all_non_exited_inferiors (this))
6550 remote_inferior
*priv
= get_remote_inferior (inf
);
6552 priv
->may_wildcard_vcont
= true;
6555 /* Check for any pending events (not reported or processed yet) and
6556 disable process and global wildcard resumes appropriately. */
6557 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6559 for (thread_info
*tp
: all_non_exited_threads (this))
6561 /* If a thread of a process is not meant to be resumed, then we
6562 can't wildcard that process. */
6565 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6567 /* And if we can't wildcard a process, we can't wildcard
6568 everything either. */
6569 may_global_wildcard_vcont
= 0;
6573 /* If a thread is the parent of an unfollowed fork, then we
6574 can't do a global wildcard, as that would resume the fork
6576 if (is_pending_fork_parent_thread (tp
))
6577 may_global_wildcard_vcont
= 0;
6580 /* Now let's build the vCont packet(s). Actions must be appended
6581 from narrower to wider scopes (thread -> process -> global). If
6582 we end up with too many actions for a single packet vcont_builder
6583 flushes the current vCont packet to the remote side and starts a
6585 struct vcont_builder
vcont_builder (this);
6587 /* Threads first. */
6588 for (thread_info
*tp
: all_non_exited_threads (this))
6590 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6592 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
6595 gdb_assert (!thread_is_in_step_over_chain (tp
));
6597 if (!remote_thr
->last_resume_step
6598 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
6599 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6601 /* We'll send a wildcard resume instead. */
6602 remote_thr
->vcont_resumed
= 1;
6606 vcont_builder
.push_action (tp
->ptid
,
6607 remote_thr
->last_resume_step
,
6608 remote_thr
->last_resume_sig
);
6609 remote_thr
->vcont_resumed
= 1;
6612 /* Now check whether we can send any process-wide wildcard. This is
6613 to avoid sending a global wildcard in the case nothing is
6614 supposed to be resumed. */
6615 any_process_wildcard
= 0;
6617 for (inferior
*inf
: all_non_exited_inferiors (this))
6619 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6621 any_process_wildcard
= 1;
6626 if (any_process_wildcard
)
6628 /* If all processes are wildcard-able, then send a single "c"
6629 action, otherwise, send an "all (-1) threads of process"
6630 continue action for each running process, if any. */
6631 if (may_global_wildcard_vcont
)
6633 vcont_builder
.push_action (minus_one_ptid
,
6634 false, GDB_SIGNAL_0
);
6638 for (inferior
*inf
: all_non_exited_inferiors (this))
6640 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6642 vcont_builder
.push_action (ptid_t (inf
->pid
),
6643 false, GDB_SIGNAL_0
);
6649 vcont_builder
.flush ();
6654 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6655 thread, all threads of a remote process, or all threads of all
6659 remote_target::remote_stop_ns (ptid_t ptid
)
6661 struct remote_state
*rs
= get_remote_state ();
6662 char *p
= rs
->buf
.data ();
6663 char *endp
= p
+ get_remote_packet_size ();
6665 /* FIXME: This supports_vCont_probed check is a workaround until
6666 packet_support is per-connection. */
6667 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
6668 || !rs
->supports_vCont_probed
)
6669 remote_vcont_probe ();
6671 if (!rs
->supports_vCont
.t
)
6672 error (_("Remote server does not support stopping threads"));
6674 if (ptid
== minus_one_ptid
6675 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6676 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6681 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6684 /* All (-1) threads of process. */
6685 nptid
= ptid_t (ptid
.pid (), -1, 0);
6688 /* Small optimization: if we already have a stop reply for
6689 this thread, no use in telling the stub we want this
6691 if (peek_stop_reply (ptid
))
6697 write_ptid (p
, endp
, nptid
);
6700 /* In non-stop, we get an immediate OK reply. The stop reply will
6701 come in asynchronously by notification. */
6703 getpkt (&rs
->buf
, 0);
6704 if (strcmp (rs
->buf
.data (), "OK") != 0)
6705 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
).c_str (),
6709 /* All-stop version of target_interrupt. Sends a break or a ^C to
6710 interrupt the remote target. It is undefined which thread of which
6711 process reports the interrupt. */
6714 remote_target::remote_interrupt_as ()
6716 struct remote_state
*rs
= get_remote_state ();
6718 rs
->ctrlc_pending_p
= 1;
6720 /* If the inferior is stopped already, but the core didn't know
6721 about it yet, just ignore the request. The cached wait status
6722 will be collected in remote_wait. */
6723 if (rs
->cached_wait_status
)
6726 /* Send interrupt_sequence to remote target. */
6727 send_interrupt_sequence ();
6730 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6731 the remote target. It is undefined which thread of which process
6732 reports the interrupt. Throws an error if the packet is not
6733 supported by the server. */
6736 remote_target::remote_interrupt_ns ()
6738 struct remote_state
*rs
= get_remote_state ();
6739 char *p
= rs
->buf
.data ();
6740 char *endp
= p
+ get_remote_packet_size ();
6742 xsnprintf (p
, endp
- p
, "vCtrlC");
6744 /* In non-stop, we get an immediate OK reply. The stop reply will
6745 come in asynchronously by notification. */
6747 getpkt (&rs
->buf
, 0);
6749 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6753 case PACKET_UNKNOWN
:
6754 error (_("No support for interrupting the remote target."));
6756 error (_("Interrupting target failed: %s"), rs
->buf
.data ());
6760 /* Implement the to_stop function for the remote targets. */
6763 remote_target::stop (ptid_t ptid
)
6766 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6768 if (target_is_non_stop_p ())
6769 remote_stop_ns (ptid
);
6772 /* We don't currently have a way to transparently pause the
6773 remote target in all-stop mode. Interrupt it instead. */
6774 remote_interrupt_as ();
6778 /* Implement the to_interrupt function for the remote targets. */
6781 remote_target::interrupt ()
6784 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6786 if (target_is_non_stop_p ())
6787 remote_interrupt_ns ();
6789 remote_interrupt_as ();
6792 /* Implement the to_pass_ctrlc function for the remote targets. */
6795 remote_target::pass_ctrlc ()
6797 struct remote_state
*rs
= get_remote_state ();
6800 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6802 /* If we're starting up, we're not fully synced yet. Quit
6804 if (rs
->starting_up
)
6806 /* If ^C has already been sent once, offer to disconnect. */
6807 else if (rs
->ctrlc_pending_p
)
6810 target_interrupt ();
6813 /* Ask the user what to do when an interrupt is received. */
6816 remote_target::interrupt_query ()
6818 struct remote_state
*rs
= get_remote_state ();
6820 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6822 if (query (_("The target is not responding to interrupt requests.\n"
6823 "Stop debugging it? ")))
6825 remote_unpush_target (this);
6826 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6831 if (query (_("Interrupted while waiting for the program.\n"
6832 "Give up waiting? ")))
6837 /* Enable/disable target terminal ownership. Most targets can use
6838 terminal groups to control terminal ownership. Remote targets are
6839 different in that explicit transfer of ownership to/from GDB/target
6843 remote_target::terminal_inferior ()
6845 /* NOTE: At this point we could also register our selves as the
6846 recipient of all input. Any characters typed could then be
6847 passed on down to the target. */
6851 remote_target::terminal_ours ()
6856 remote_console_output (const char *msg
)
6860 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6863 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6867 gdb_stdtarg
->puts (tb
);
6869 gdb_stdtarg
->flush ();
6872 struct stop_reply
: public notif_event
6876 /* The identifier of the thread about this event */
6879 /* The remote state this event is associated with. When the remote
6880 connection, represented by a remote_state object, is closed,
6881 all the associated stop_reply events should be released. */
6882 struct remote_state
*rs
;
6884 struct target_waitstatus ws
;
6886 /* The architecture associated with the expedited registers. */
6889 /* Expedited registers. This makes remote debugging a bit more
6890 efficient for those targets that provide critical registers as
6891 part of their normal status mechanism (as another roundtrip to
6892 fetch them is avoided). */
6893 std::vector
<cached_reg_t
> regcache
;
6895 enum target_stop_reason stop_reason
;
6897 CORE_ADDR watch_data_address
;
6902 /* Return the length of the stop reply queue. */
6905 remote_target::stop_reply_queue_length ()
6907 remote_state
*rs
= get_remote_state ();
6908 return rs
->stop_reply_queue
.size ();
6912 remote_notif_stop_parse (remote_target
*remote
,
6913 struct notif_client
*self
, const char *buf
,
6914 struct notif_event
*event
)
6916 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6920 remote_notif_stop_ack (remote_target
*remote
,
6921 struct notif_client
*self
, const char *buf
,
6922 struct notif_event
*event
)
6924 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6927 putpkt (remote
, self
->ack_command
);
6929 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6931 /* We got an unknown stop reply. */
6932 error (_("Unknown stop reply"));
6935 remote
->push_stop_reply (stop_reply
);
6939 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
6940 struct notif_client
*self
)
6942 /* We can't get pending events in remote_notif_process for
6943 notification stop, and we have to do this in remote_wait_ns
6944 instead. If we fetch all queued events from stub, remote stub
6945 may exit and we have no chance to process them back in
6947 remote_state
*rs
= remote
->get_remote_state ();
6948 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
6952 stop_reply::~stop_reply ()
6954 for (cached_reg_t
®
: regcache
)
6958 static notif_event_up
6959 remote_notif_stop_alloc_reply ()
6961 return notif_event_up (new struct stop_reply ());
6964 /* A client of notification Stop. */
6966 struct notif_client notif_client_stop
=
6970 remote_notif_stop_parse
,
6971 remote_notif_stop_ack
,
6972 remote_notif_stop_can_get_pending_events
,
6973 remote_notif_stop_alloc_reply
,
6977 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6978 the pid of the process that owns the threads we want to check, or
6979 -1 if we want to check all threads. */
6982 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6985 if (ws
->kind
== TARGET_WAITKIND_FORKED
6986 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6988 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
6995 /* Return the thread's pending status used to determine whether the
6996 thread is a fork parent stopped at a fork event. */
6998 static struct target_waitstatus
*
6999 thread_pending_fork_status (struct thread_info
*thread
)
7001 if (thread
->suspend
.waitstatus_pending_p
)
7002 return &thread
->suspend
.waitstatus
;
7004 return &thread
->pending_follow
;
7007 /* Determine if THREAD is a pending fork parent thread. */
7010 is_pending_fork_parent_thread (struct thread_info
*thread
)
7012 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7015 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
7018 /* If CONTEXT contains any fork child threads that have not been
7019 reported yet, remove them from the CONTEXT list. If such a
7020 thread exists it is because we are stopped at a fork catchpoint
7021 and have not yet called follow_fork, which will set up the
7022 host-side data structures for the new process. */
7025 remote_target::remove_new_fork_children (threads_listing_context
*context
)
7028 struct notif_client
*notif
= ¬if_client_stop
;
7030 /* For any threads stopped at a fork event, remove the corresponding
7031 fork child threads from the CONTEXT list. */
7032 for (thread_info
*thread
: all_non_exited_threads (this))
7034 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7036 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7037 context
->remove_thread (ws
->value
.related_pid
);
7040 /* Check for any pending fork events (not reported or processed yet)
7041 in process PID and remove those fork child threads from the
7042 CONTEXT list as well. */
7043 remote_notif_get_pending_events (notif
);
7044 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7045 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7046 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7047 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7048 context
->remove_thread (event
->ws
.value
.related_pid
);
7051 /* Check whether any event pending in the vStopped queue would prevent
7052 a global or process wildcard vCont action. Clear
7053 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7054 and clear the event inferior's may_wildcard_vcont flag if we can't
7055 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7058 remote_target::check_pending_events_prevent_wildcard_vcont
7059 (int *may_global_wildcard
)
7061 struct notif_client
*notif
= ¬if_client_stop
;
7063 remote_notif_get_pending_events (notif
);
7064 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7066 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7067 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7070 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7071 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7072 *may_global_wildcard
= 0;
7074 struct inferior
*inf
= find_inferior_ptid (this, event
->ptid
);
7076 /* This may be the first time we heard about this process.
7077 Regardless, we must not do a global wildcard resume, otherwise
7078 we'd resume this process too. */
7079 *may_global_wildcard
= 0;
7081 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7085 /* Discard all pending stop replies of inferior INF. */
7088 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7090 struct stop_reply
*reply
;
7091 struct remote_state
*rs
= get_remote_state ();
7092 struct remote_notif_state
*rns
= rs
->notif_state
;
7094 /* This function can be notified when an inferior exists. When the
7095 target is not remote, the notification state is NULL. */
7096 if (rs
->remote_desc
== NULL
)
7099 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7101 /* Discard the in-flight notification. */
7102 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7105 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
7108 /* Discard the stop replies we have already pulled with
7110 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7111 rs
->stop_reply_queue
.end (),
7112 [=] (const stop_reply_up
&event
)
7114 return event
->ptid
.pid () == inf
->pid
;
7116 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7119 /* Discard the stop replies for RS in stop_reply_queue. */
7122 remote_target::discard_pending_stop_replies_in_queue ()
7124 remote_state
*rs
= get_remote_state ();
7126 /* Discard the stop replies we have already pulled with
7128 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7129 rs
->stop_reply_queue
.end (),
7130 [=] (const stop_reply_up
&event
)
7132 return event
->rs
== rs
;
7134 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7137 /* Remove the first reply in 'stop_reply_queue' which matches
7141 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7143 remote_state
*rs
= get_remote_state ();
7145 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7146 rs
->stop_reply_queue
.end (),
7147 [=] (const stop_reply_up
&event
)
7149 return event
->ptid
.matches (ptid
);
7151 struct stop_reply
*result
;
7152 if (iter
== rs
->stop_reply_queue
.end ())
7156 result
= iter
->release ();
7157 rs
->stop_reply_queue
.erase (iter
);
7161 fprintf_unfiltered (gdb_stdlog
,
7162 "notif: discard queued event: 'Stop' in %s\n",
7163 target_pid_to_str (ptid
).c_str ());
7168 /* Look for a queued stop reply belonging to PTID. If one is found,
7169 remove it from the queue, and return it. Returns NULL if none is
7170 found. If there are still queued events left to process, tell the
7171 event loop to get back to target_wait soon. */
7174 remote_target::queued_stop_reply (ptid_t ptid
)
7176 remote_state
*rs
= get_remote_state ();
7177 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7179 if (!rs
->stop_reply_queue
.empty ())
7181 /* There's still at least an event left. */
7182 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7188 /* Push a fully parsed stop reply in the stop reply queue. Since we
7189 know that we now have at least one queued event left to pass to the
7190 core side, tell the event loop to get back to target_wait soon. */
7193 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7195 remote_state
*rs
= get_remote_state ();
7196 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7199 fprintf_unfiltered (gdb_stdlog
,
7200 "notif: push 'Stop' %s to queue %d\n",
7201 target_pid_to_str (new_event
->ptid
).c_str (),
7202 int (rs
->stop_reply_queue
.size ()));
7204 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7207 /* Returns true if we have a stop reply for PTID. */
7210 remote_target::peek_stop_reply (ptid_t ptid
)
7212 remote_state
*rs
= get_remote_state ();
7213 for (auto &event
: rs
->stop_reply_queue
)
7214 if (ptid
== event
->ptid
7215 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7220 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7221 starting with P and ending with PEND matches PREFIX. */
7224 strprefix (const char *p
, const char *pend
, const char *prefix
)
7226 for ( ; p
< pend
; p
++, prefix
++)
7229 return *prefix
== '\0';
7232 /* Parse the stop reply in BUF. Either the function succeeds, and the
7233 result is stored in EVENT, or throws an error. */
7236 remote_target::remote_parse_stop_reply (const char *buf
, stop_reply
*event
)
7238 remote_arch_state
*rsa
= NULL
;
7243 event
->ptid
= null_ptid
;
7244 event
->rs
= get_remote_state ();
7245 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7246 event
->ws
.value
.integer
= 0;
7247 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7248 event
->regcache
.clear ();
7253 case 'T': /* Status with PC, SP, FP, ... */
7254 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7255 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7257 n... = register number
7258 r... = register contents
7261 p
= &buf
[3]; /* after Txx */
7267 p1
= strchr (p
, ':');
7269 error (_("Malformed packet(a) (missing colon): %s\n\
7273 error (_("Malformed packet(a) (missing register number): %s\n\
7277 /* Some "registers" are actually extended stop information.
7278 Note if you're adding a new entry here: GDB 7.9 and
7279 earlier assume that all register "numbers" that start
7280 with an hex digit are real register numbers. Make sure
7281 the server only sends such a packet if it knows the
7282 client understands it. */
7284 if (strprefix (p
, p1
, "thread"))
7285 event
->ptid
= read_ptid (++p1
, &p
);
7286 else if (strprefix (p
, p1
, "syscall_entry"))
7290 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7291 p
= unpack_varlen_hex (++p1
, &sysno
);
7292 event
->ws
.value
.syscall_number
= (int) sysno
;
7294 else if (strprefix (p
, p1
, "syscall_return"))
7298 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7299 p
= unpack_varlen_hex (++p1
, &sysno
);
7300 event
->ws
.value
.syscall_number
= (int) sysno
;
7302 else if (strprefix (p
, p1
, "watch")
7303 || strprefix (p
, p1
, "rwatch")
7304 || strprefix (p
, p1
, "awatch"))
7306 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7307 p
= unpack_varlen_hex (++p1
, &addr
);
7308 event
->watch_data_address
= (CORE_ADDR
) addr
;
7310 else if (strprefix (p
, p1
, "swbreak"))
7312 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7314 /* Make sure the stub doesn't forget to indicate support
7316 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7317 error (_("Unexpected swbreak stop reason"));
7319 /* The value part is documented as "must be empty",
7320 though we ignore it, in case we ever decide to make
7321 use of it in a backward compatible way. */
7322 p
= strchrnul (p1
+ 1, ';');
7324 else if (strprefix (p
, p1
, "hwbreak"))
7326 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7328 /* Make sure the stub doesn't forget to indicate support
7330 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7331 error (_("Unexpected hwbreak stop reason"));
7334 p
= strchrnul (p1
+ 1, ';');
7336 else if (strprefix (p
, p1
, "library"))
7338 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7339 p
= strchrnul (p1
+ 1, ';');
7341 else if (strprefix (p
, p1
, "replaylog"))
7343 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7344 /* p1 will indicate "begin" or "end", but it makes
7345 no difference for now, so ignore it. */
7346 p
= strchrnul (p1
+ 1, ';');
7348 else if (strprefix (p
, p1
, "core"))
7352 p
= unpack_varlen_hex (++p1
, &c
);
7355 else if (strprefix (p
, p1
, "fork"))
7357 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7358 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7360 else if (strprefix (p
, p1
, "vfork"))
7362 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7363 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7365 else if (strprefix (p
, p1
, "vforkdone"))
7367 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7368 p
= strchrnul (p1
+ 1, ';');
7370 else if (strprefix (p
, p1
, "exec"))
7375 /* Determine the length of the execd pathname. */
7376 p
= unpack_varlen_hex (++p1
, &ignored
);
7377 pathlen
= (p
- p1
) / 2;
7379 /* Save the pathname for event reporting and for
7380 the next run command. */
7381 gdb::unique_xmalloc_ptr
<char[]> pathname
7382 ((char *) xmalloc (pathlen
+ 1));
7383 hex2bin (p1
, (gdb_byte
*) pathname
.get (), pathlen
);
7384 pathname
[pathlen
] = '\0';
7386 /* This is freed during event handling. */
7387 event
->ws
.value
.execd_pathname
= pathname
.release ();
7388 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7390 /* Skip the registers included in this packet, since
7391 they may be for an architecture different from the
7392 one used by the original program. */
7395 else if (strprefix (p
, p1
, "create"))
7397 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7398 p
= strchrnul (p1
+ 1, ';');
7407 p
= strchrnul (p1
+ 1, ';');
7412 /* Maybe a real ``P'' register number. */
7413 p_temp
= unpack_varlen_hex (p
, &pnum
);
7414 /* If the first invalid character is the colon, we got a
7415 register number. Otherwise, it's an unknown stop
7419 /* If we haven't parsed the event's thread yet, find
7420 it now, in order to find the architecture of the
7421 reported expedited registers. */
7422 if (event
->ptid
== null_ptid
)
7424 /* If there is no thread-id information then leave
7425 the event->ptid as null_ptid. Later in
7426 process_stop_reply we will pick a suitable
7428 const char *thr
= strstr (p1
+ 1, ";thread:");
7430 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7437 = (event
->ptid
== null_ptid
7439 : find_inferior_ptid (this, event
->ptid
));
7440 /* If this is the first time we learn anything
7441 about this process, skip the registers
7442 included in this packet, since we don't yet
7443 know which architecture to use to parse them.
7444 We'll determine the architecture later when
7445 we process the stop reply and retrieve the
7446 target description, via
7447 remote_notice_new_inferior ->
7448 post_create_inferior. */
7451 p
= strchrnul (p1
+ 1, ';');
7456 event
->arch
= inf
->gdbarch
;
7457 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7461 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7462 cached_reg_t cached_reg
;
7465 error (_("Remote sent bad register number %s: %s\n\
7467 hex_string (pnum
), p
, buf
);
7469 cached_reg
.num
= reg
->regnum
;
7470 cached_reg
.data
= (gdb_byte
*)
7471 xmalloc (register_size (event
->arch
, reg
->regnum
));
7474 fieldsize
= hex2bin (p
, cached_reg
.data
,
7475 register_size (event
->arch
, reg
->regnum
));
7477 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7478 warning (_("Remote reply is too short: %s"), buf
);
7480 event
->regcache
.push_back (cached_reg
);
7484 /* Not a number. Silently skip unknown optional
7486 p
= strchrnul (p1
+ 1, ';');
7491 error (_("Remote register badly formatted: %s\nhere: %s"),
7496 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7500 case 'S': /* Old style status, just signal only. */
7504 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7505 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7506 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7507 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7509 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7512 case 'w': /* Thread exited. */
7516 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7517 p
= unpack_varlen_hex (&buf
[1], &value
);
7518 event
->ws
.value
.integer
= value
;
7520 error (_("stop reply packet badly formatted: %s"), buf
);
7521 event
->ptid
= read_ptid (++p
, NULL
);
7524 case 'W': /* Target exited. */
7529 /* GDB used to accept only 2 hex chars here. Stubs should
7530 only send more if they detect GDB supports multi-process
7532 p
= unpack_varlen_hex (&buf
[1], &value
);
7536 /* The remote process exited. */
7537 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7538 event
->ws
.value
.integer
= value
;
7542 /* The remote process exited with a signal. */
7543 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7544 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7545 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7547 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7550 /* If no process is specified, return null_ptid, and let the
7551 caller figure out the right process to use. */
7561 else if (startswith (p
, "process:"))
7565 p
+= sizeof ("process:") - 1;
7566 unpack_varlen_hex (p
, &upid
);
7570 error (_("unknown stop reply packet: %s"), buf
);
7573 error (_("unknown stop reply packet: %s"), buf
);
7574 event
->ptid
= ptid_t (pid
);
7578 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7579 event
->ptid
= minus_one_ptid
;
7584 /* When the stub wants to tell GDB about a new notification reply, it
7585 sends a notification (%Stop, for example). Those can come it at
7586 any time, hence, we have to make sure that any pending
7587 putpkt/getpkt sequence we're making is finished, before querying
7588 the stub for more events with the corresponding ack command
7589 (vStopped, for example). E.g., if we started a vStopped sequence
7590 immediately upon receiving the notification, something like this
7598 1.6) <-- (registers reply to step #1.3)
7600 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7603 To solve this, whenever we parse a %Stop notification successfully,
7604 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7605 doing whatever we were doing:
7611 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7612 2.5) <-- (registers reply to step #2.3)
7614 Eventually after step #2.5, we return to the event loop, which
7615 notices there's an event on the
7616 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7617 associated callback --- the function below. At this point, we're
7618 always safe to start a vStopped sequence. :
7621 2.7) <-- T05 thread:2
7627 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7629 struct remote_state
*rs
= get_remote_state ();
7631 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7634 fprintf_unfiltered (gdb_stdlog
,
7635 "notif: process: '%s' ack pending event\n",
7639 nc
->ack (this, nc
, rs
->buf
.data (),
7640 rs
->notif_state
->pending_event
[nc
->id
]);
7641 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7645 getpkt (&rs
->buf
, 0);
7646 if (strcmp (rs
->buf
.data (), "OK") == 0)
7649 remote_notif_ack (this, nc
, rs
->buf
.data ());
7655 fprintf_unfiltered (gdb_stdlog
,
7656 "notif: process: '%s' no pending reply\n",
7661 /* Wrapper around remote_target::remote_notif_get_pending_events to
7662 avoid having to export the whole remote_target class. */
7665 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7667 remote
->remote_notif_get_pending_events (nc
);
7670 /* Called when it is decided that STOP_REPLY holds the info of the
7671 event that is to be returned to the core. This function always
7672 destroys STOP_REPLY. */
7675 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
7676 struct target_waitstatus
*status
)
7680 *status
= stop_reply
->ws
;
7681 ptid
= stop_reply
->ptid
;
7683 /* If no thread/process was reported by the stub then use the first
7684 non-exited thread in the current target. */
7685 if (ptid
== null_ptid
)
7687 /* Some stop events apply to all threads in an inferior, while others
7688 only apply to a single thread. */
7689 bool is_stop_for_all_threads
7690 = (status
->kind
== TARGET_WAITKIND_EXITED
7691 || status
->kind
== TARGET_WAITKIND_SIGNALLED
);
7693 for (thread_info
*thr
: all_non_exited_threads (this))
7695 if (ptid
!= null_ptid
7696 && (!is_stop_for_all_threads
7697 || ptid
.pid () != thr
->ptid
.pid ()))
7699 static bool warned
= false;
7703 /* If you are seeing this warning then the remote target
7704 has stopped without specifying a thread-id, but the
7705 target does have multiple threads (or inferiors), and
7706 so GDB is having to guess which thread stopped.
7708 Examples of what might cause this are the target
7709 sending and 'S' stop packet, or a 'T' stop packet and
7710 not including a thread-id.
7712 Additionally, the target might send a 'W' or 'X
7713 packet without including a process-id, when the target
7714 has multiple running inferiors. */
7715 if (is_stop_for_all_threads
)
7716 warning (_("multi-inferior target stopped without "
7717 "sending a process-id, using first "
7718 "non-exited inferior"));
7720 warning (_("multi-threaded target stopped without "
7721 "sending a thread-id, using first "
7722 "non-exited thread"));
7728 /* If this is a stop for all threads then don't use a particular
7729 threads ptid, instead create a new ptid where only the pid
7731 if (is_stop_for_all_threads
)
7732 ptid
= ptid_t (thr
->ptid
.pid ());
7736 gdb_assert (ptid
!= null_ptid
);
7739 if (status
->kind
!= TARGET_WAITKIND_EXITED
7740 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7741 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7743 /* Expedited registers. */
7744 if (!stop_reply
->regcache
.empty ())
7746 struct regcache
*regcache
7747 = get_thread_arch_regcache (this, ptid
, stop_reply
->arch
);
7749 for (cached_reg_t
®
: stop_reply
->regcache
)
7751 regcache
->raw_supply (reg
.num
, reg
.data
);
7755 stop_reply
->regcache
.clear ();
7758 remote_notice_new_inferior (ptid
, 0);
7759 remote_thread_info
*remote_thr
= get_remote_thread_info (this, ptid
);
7760 remote_thr
->core
= stop_reply
->core
;
7761 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7762 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7763 remote_thr
->vcont_resumed
= 0;
7770 /* The non-stop mode version of target_wait. */
7773 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7775 struct remote_state
*rs
= get_remote_state ();
7776 struct stop_reply
*stop_reply
;
7780 /* If in non-stop mode, get out of getpkt even if a
7781 notification is received. */
7783 ret
= getpkt_or_notif_sane (&rs
->buf
, 0 /* forever */, &is_notif
);
7786 if (ret
!= -1 && !is_notif
)
7789 case 'E': /* Error of some sort. */
7790 /* We're out of sync with the target now. Did it continue
7791 or not? We can't tell which thread it was in non-stop,
7792 so just ignore this. */
7793 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
7795 case 'O': /* Console output. */
7796 remote_console_output (&rs
->buf
[1]);
7799 warning (_("Invalid remote reply: %s"), rs
->buf
.data ());
7803 /* Acknowledge a pending stop reply that may have arrived in the
7805 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7806 remote_notif_get_pending_events (¬if_client_stop
);
7808 /* If indeed we noticed a stop reply, we're done. */
7809 stop_reply
= queued_stop_reply (ptid
);
7810 if (stop_reply
!= NULL
)
7811 return process_stop_reply (stop_reply
, status
);
7813 /* Still no event. If we're just polling for an event, then
7814 return to the event loop. */
7815 if (options
& TARGET_WNOHANG
)
7817 status
->kind
= TARGET_WAITKIND_IGNORE
;
7818 return minus_one_ptid
;
7821 /* Otherwise do a blocking wait. */
7822 ret
= getpkt_or_notif_sane (&rs
->buf
, 1 /* forever */, &is_notif
);
7826 /* Return the first resumed thread. */
7829 first_remote_resumed_thread (remote_target
*target
)
7831 for (thread_info
*tp
: all_non_exited_threads (target
, minus_one_ptid
))
7837 /* Wait until the remote machine stops, then return, storing status in
7838 STATUS just as `wait' would. */
7841 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
, int options
)
7843 struct remote_state
*rs
= get_remote_state ();
7844 ptid_t event_ptid
= null_ptid
;
7846 struct stop_reply
*stop_reply
;
7850 status
->kind
= TARGET_WAITKIND_IGNORE
;
7851 status
->value
.integer
= 0;
7853 stop_reply
= queued_stop_reply (ptid
);
7854 if (stop_reply
!= NULL
)
7855 return process_stop_reply (stop_reply
, status
);
7857 if (rs
->cached_wait_status
)
7858 /* Use the cached wait status, but only once. */
7859 rs
->cached_wait_status
= 0;
7864 int forever
= ((options
& TARGET_WNOHANG
) == 0
7865 && rs
->wait_forever_enabled_p
);
7867 if (!rs
->waiting_for_stop_reply
)
7869 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7870 return minus_one_ptid
;
7873 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7874 _never_ wait for ever -> test on target_is_async_p().
7875 However, before we do that we need to ensure that the caller
7876 knows how to take the target into/out of async mode. */
7877 ret
= getpkt_or_notif_sane (&rs
->buf
, forever
, &is_notif
);
7879 /* GDB gets a notification. Return to core as this event is
7881 if (ret
!= -1 && is_notif
)
7882 return minus_one_ptid
;
7884 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7885 return minus_one_ptid
;
7888 buf
= rs
->buf
.data ();
7890 /* Assume that the target has acknowledged Ctrl-C unless we receive
7891 an 'F' or 'O' packet. */
7892 if (buf
[0] != 'F' && buf
[0] != 'O')
7893 rs
->ctrlc_pending_p
= 0;
7897 case 'E': /* Error of some sort. */
7898 /* We're out of sync with the target now. Did it continue or
7899 not? Not is more likely, so report a stop. */
7900 rs
->waiting_for_stop_reply
= 0;
7902 warning (_("Remote failure reply: %s"), buf
);
7903 status
->kind
= TARGET_WAITKIND_STOPPED
;
7904 status
->value
.sig
= GDB_SIGNAL_0
;
7906 case 'F': /* File-I/O request. */
7907 /* GDB may access the inferior memory while handling the File-I/O
7908 request, but we don't want GDB accessing memory while waiting
7909 for a stop reply. See the comments in putpkt_binary. Set
7910 waiting_for_stop_reply to 0 temporarily. */
7911 rs
->waiting_for_stop_reply
= 0;
7912 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
7913 rs
->ctrlc_pending_p
= 0;
7914 /* GDB handled the File-I/O request, and the target is running
7915 again. Keep waiting for events. */
7916 rs
->waiting_for_stop_reply
= 1;
7918 case 'N': case 'T': case 'S': case 'X': case 'W':
7920 /* There is a stop reply to handle. */
7921 rs
->waiting_for_stop_reply
= 0;
7924 = (struct stop_reply
*) remote_notif_parse (this,
7928 event_ptid
= process_stop_reply (stop_reply
, status
);
7931 case 'O': /* Console output. */
7932 remote_console_output (buf
+ 1);
7935 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7937 /* Zero length reply means that we tried 'S' or 'C' and the
7938 remote system doesn't support it. */
7939 target_terminal::ours_for_output ();
7941 ("Can't send signals to this remote system. %s not sent.\n",
7942 gdb_signal_to_name (rs
->last_sent_signal
));
7943 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7944 target_terminal::inferior ();
7946 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7952 warning (_("Invalid remote reply: %s"), buf
);
7956 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7957 return minus_one_ptid
;
7958 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7960 /* Nothing interesting happened. If we're doing a non-blocking
7961 poll, we're done. Otherwise, go back to waiting. */
7962 if (options
& TARGET_WNOHANG
)
7963 return minus_one_ptid
;
7967 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7968 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7970 if (event_ptid
!= null_ptid
)
7971 record_currthread (rs
, event_ptid
);
7973 event_ptid
= first_remote_resumed_thread (this);
7977 /* A process exit. Invalidate our notion of current thread. */
7978 record_currthread (rs
, minus_one_ptid
);
7979 /* It's possible that the packet did not include a pid. */
7980 if (event_ptid
== null_ptid
)
7981 event_ptid
= first_remote_resumed_thread (this);
7982 /* EVENT_PTID could still be NULL_PTID. Double-check. */
7983 if (event_ptid
== null_ptid
)
7984 event_ptid
= magic_null_ptid
;
7990 /* Wait until the remote machine stops, then return, storing status in
7991 STATUS just as `wait' would. */
7994 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7998 if (target_is_non_stop_p ())
7999 event_ptid
= wait_ns (ptid
, status
, options
);
8001 event_ptid
= wait_as (ptid
, status
, options
);
8003 if (target_is_async_p ())
8005 remote_state
*rs
= get_remote_state ();
8007 /* If there are are events left in the queue tell the event loop
8009 if (!rs
->stop_reply_queue
.empty ())
8010 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
8016 /* Fetch a single register using a 'p' packet. */
8019 remote_target::fetch_register_using_p (struct regcache
*regcache
,
8022 struct gdbarch
*gdbarch
= regcache
->arch ();
8023 struct remote_state
*rs
= get_remote_state ();
8025 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8028 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
8031 if (reg
->pnum
== -1)
8034 p
= rs
->buf
.data ();
8036 p
+= hexnumstr (p
, reg
->pnum
);
8039 getpkt (&rs
->buf
, 0);
8041 buf
= rs
->buf
.data ();
8043 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_p
]))
8047 case PACKET_UNKNOWN
:
8050 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
8051 gdbarch_register_name (regcache
->arch (),
8056 /* If this register is unfetchable, tell the regcache. */
8059 regcache
->raw_supply (reg
->regnum
, NULL
);
8063 /* Otherwise, parse and supply the value. */
8069 error (_("fetch_register_using_p: early buf termination"));
8071 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8074 regcache
->raw_supply (reg
->regnum
, regp
);
8078 /* Fetch the registers included in the target's 'g' packet. */
8081 remote_target::send_g_packet ()
8083 struct remote_state
*rs
= get_remote_state ();
8086 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "g");
8088 getpkt (&rs
->buf
, 0);
8089 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8090 error (_("Could not read registers; remote failure reply '%s'"),
8093 /* We can get out of synch in various cases. If the first character
8094 in the buffer is not a hex character, assume that has happened
8095 and try to fetch another packet to read. */
8096 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8097 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8098 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8099 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8102 fprintf_unfiltered (gdb_stdlog
,
8103 "Bad register packet; fetching a new packet\n");
8104 getpkt (&rs
->buf
, 0);
8107 buf_len
= strlen (rs
->buf
.data ());
8109 /* Sanity check the received packet. */
8110 if (buf_len
% 2 != 0)
8111 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
.data ());
8117 remote_target::process_g_packet (struct regcache
*regcache
)
8119 struct gdbarch
*gdbarch
= regcache
->arch ();
8120 struct remote_state
*rs
= get_remote_state ();
8121 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8126 buf_len
= strlen (rs
->buf
.data ());
8128 /* Further sanity checks, with knowledge of the architecture. */
8129 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8130 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8132 rsa
->sizeof_g_packet
, buf_len
/ 2,
8135 /* Save the size of the packet sent to us by the target. It is used
8136 as a heuristic when determining the max size of packets that the
8137 target can safely receive. */
8138 if (rsa
->actual_register_packet_size
== 0)
8139 rsa
->actual_register_packet_size
= buf_len
;
8141 /* If this is smaller than we guessed the 'g' packet would be,
8142 update our records. A 'g' reply that doesn't include a register's
8143 value implies either that the register is not available, or that
8144 the 'p' packet must be used. */
8145 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8147 long sizeof_g_packet
= buf_len
/ 2;
8149 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8151 long offset
= rsa
->regs
[i
].offset
;
8152 long reg_size
= register_size (gdbarch
, i
);
8154 if (rsa
->regs
[i
].pnum
== -1)
8157 if (offset
>= sizeof_g_packet
)
8158 rsa
->regs
[i
].in_g_packet
= 0;
8159 else if (offset
+ reg_size
> sizeof_g_packet
)
8160 error (_("Truncated register %d in remote 'g' packet"), i
);
8162 rsa
->regs
[i
].in_g_packet
= 1;
8165 /* Looks valid enough, we can assume this is the correct length
8166 for a 'g' packet. It's important not to adjust
8167 rsa->sizeof_g_packet if we have truncated registers otherwise
8168 this "if" won't be run the next time the method is called
8169 with a packet of the same size and one of the internal errors
8170 below will trigger instead. */
8171 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8174 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8176 /* Unimplemented registers read as all bits zero. */
8177 memset (regs
, 0, rsa
->sizeof_g_packet
);
8179 /* Reply describes registers byte by byte, each byte encoded as two
8180 hex characters. Suck them all up, then supply them to the
8181 register cacheing/storage mechanism. */
8183 p
= rs
->buf
.data ();
8184 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8186 if (p
[0] == 0 || p
[1] == 0)
8187 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8188 internal_error (__FILE__
, __LINE__
,
8189 _("unexpected end of 'g' packet reply"));
8191 if (p
[0] == 'x' && p
[1] == 'x')
8192 regs
[i
] = 0; /* 'x' */
8194 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8198 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8200 struct packet_reg
*r
= &rsa
->regs
[i
];
8201 long reg_size
= register_size (gdbarch
, i
);
8205 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
.data ()))
8206 /* This shouldn't happen - we adjusted in_g_packet above. */
8207 internal_error (__FILE__
, __LINE__
,
8208 _("unexpected end of 'g' packet reply"));
8209 else if (rs
->buf
[r
->offset
* 2] == 'x')
8211 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
.data ()));
8212 /* The register isn't available, mark it as such (at
8213 the same time setting the value to zero). */
8214 regcache
->raw_supply (r
->regnum
, NULL
);
8217 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8223 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8226 process_g_packet (regcache
);
8229 /* Make the remote selected traceframe match GDB's selected
8233 remote_target::set_remote_traceframe ()
8236 struct remote_state
*rs
= get_remote_state ();
8238 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8241 /* Avoid recursion, remote_trace_find calls us again. */
8242 rs
->remote_traceframe_number
= get_traceframe_number ();
8244 newnum
= target_trace_find (tfind_number
,
8245 get_traceframe_number (), 0, 0, NULL
);
8247 /* Should not happen. If it does, all bets are off. */
8248 if (newnum
!= get_traceframe_number ())
8249 warning (_("could not set remote traceframe"));
8253 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8255 struct gdbarch
*gdbarch
= regcache
->arch ();
8256 struct remote_state
*rs
= get_remote_state ();
8257 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8260 set_remote_traceframe ();
8261 set_general_thread (regcache
->ptid ());
8265 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8267 gdb_assert (reg
!= NULL
);
8269 /* If this register might be in the 'g' packet, try that first -
8270 we are likely to read more than one register. If this is the
8271 first 'g' packet, we might be overly optimistic about its
8272 contents, so fall back to 'p'. */
8273 if (reg
->in_g_packet
)
8275 fetch_registers_using_g (regcache
);
8276 if (reg
->in_g_packet
)
8280 if (fetch_register_using_p (regcache
, reg
))
8283 /* This register is not available. */
8284 regcache
->raw_supply (reg
->regnum
, NULL
);
8289 fetch_registers_using_g (regcache
);
8291 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8292 if (!rsa
->regs
[i
].in_g_packet
)
8293 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8295 /* This register is not available. */
8296 regcache
->raw_supply (i
, NULL
);
8300 /* Prepare to store registers. Since we may send them all (using a
8301 'G' request), we have to read out the ones we don't want to change
8305 remote_target::prepare_to_store (struct regcache
*regcache
)
8307 struct remote_state
*rs
= get_remote_state ();
8308 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8311 /* Make sure the entire registers array is valid. */
8312 switch (packet_support (PACKET_P
))
8314 case PACKET_DISABLE
:
8315 case PACKET_SUPPORT_UNKNOWN
:
8316 /* Make sure all the necessary registers are cached. */
8317 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8318 if (rsa
->regs
[i
].in_g_packet
)
8319 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8326 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8327 packet was not recognized. */
8330 remote_target::store_register_using_P (const struct regcache
*regcache
,
8333 struct gdbarch
*gdbarch
= regcache
->arch ();
8334 struct remote_state
*rs
= get_remote_state ();
8335 /* Try storing a single register. */
8336 char *buf
= rs
->buf
.data ();
8337 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8340 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8343 if (reg
->pnum
== -1)
8346 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8347 p
= buf
+ strlen (buf
);
8348 regcache
->raw_collect (reg
->regnum
, regp
);
8349 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8351 getpkt (&rs
->buf
, 0);
8353 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8358 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8359 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
.data ());
8360 case PACKET_UNKNOWN
:
8363 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8367 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8368 contents of the register cache buffer. FIXME: ignores errors. */
8371 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8373 struct remote_state
*rs
= get_remote_state ();
8374 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8378 /* Extract all the registers in the regcache copying them into a
8383 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8384 memset (regs
, 0, rsa
->sizeof_g_packet
);
8385 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8387 struct packet_reg
*r
= &rsa
->regs
[i
];
8390 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8394 /* Command describes registers byte by byte,
8395 each byte encoded as two hex characters. */
8396 p
= rs
->buf
.data ();
8398 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8400 getpkt (&rs
->buf
, 0);
8401 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8402 error (_("Could not write registers; remote failure reply '%s'"),
8406 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8407 of the register cache buffer. FIXME: ignores errors. */
8410 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8412 struct gdbarch
*gdbarch
= regcache
->arch ();
8413 struct remote_state
*rs
= get_remote_state ();
8414 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8417 set_remote_traceframe ();
8418 set_general_thread (regcache
->ptid ());
8422 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8424 gdb_assert (reg
!= NULL
);
8426 /* Always prefer to store registers using the 'P' packet if
8427 possible; we often change only a small number of registers.
8428 Sometimes we change a larger number; we'd need help from a
8429 higher layer to know to use 'G'. */
8430 if (store_register_using_P (regcache
, reg
))
8433 /* For now, don't complain if we have no way to write the
8434 register. GDB loses track of unavailable registers too
8435 easily. Some day, this may be an error. We don't have
8436 any way to read the register, either... */
8437 if (!reg
->in_g_packet
)
8440 store_registers_using_G (regcache
);
8444 store_registers_using_G (regcache
);
8446 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8447 if (!rsa
->regs
[i
].in_g_packet
)
8448 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8449 /* See above for why we do not issue an error here. */
8454 /* Return the number of hex digits in num. */
8457 hexnumlen (ULONGEST num
)
8461 for (i
= 0; num
!= 0; i
++)
8464 return std::max (i
, 1);
8467 /* Set BUF to the minimum number of hex digits representing NUM. */
8470 hexnumstr (char *buf
, ULONGEST num
)
8472 int len
= hexnumlen (num
);
8474 return hexnumnstr (buf
, num
, len
);
8478 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8481 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8487 for (i
= width
- 1; i
>= 0; i
--)
8489 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8496 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8499 remote_address_masked (CORE_ADDR addr
)
8501 unsigned int address_size
= remote_address_size
;
8503 /* If "remoteaddresssize" was not set, default to target address size. */
8505 address_size
= gdbarch_addr_bit (target_gdbarch ());
8507 if (address_size
> 0
8508 && address_size
< (sizeof (ULONGEST
) * 8))
8510 /* Only create a mask when that mask can safely be constructed
8511 in a ULONGEST variable. */
8514 mask
= (mask
<< address_size
) - 1;
8520 /* Determine whether the remote target supports binary downloading.
8521 This is accomplished by sending a no-op memory write of zero length
8522 to the target at the specified address. It does not suffice to send
8523 the whole packet, since many stubs strip the eighth bit and
8524 subsequently compute a wrong checksum, which causes real havoc with
8527 NOTE: This can still lose if the serial line is not eight-bit
8528 clean. In cases like this, the user should clear "remote
8532 remote_target::check_binary_download (CORE_ADDR addr
)
8534 struct remote_state
*rs
= get_remote_state ();
8536 switch (packet_support (PACKET_X
))
8538 case PACKET_DISABLE
:
8542 case PACKET_SUPPORT_UNKNOWN
:
8546 p
= rs
->buf
.data ();
8548 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8550 p
+= hexnumstr (p
, (ULONGEST
) 0);
8554 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8555 getpkt (&rs
->buf
, 0);
8557 if (rs
->buf
[0] == '\0')
8560 fprintf_unfiltered (gdb_stdlog
,
8561 "binary downloading NOT "
8562 "supported by target\n");
8563 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8568 fprintf_unfiltered (gdb_stdlog
,
8569 "binary downloading supported by target\n");
8570 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8577 /* Helper function to resize the payload in order to try to get a good
8578 alignment. We try to write an amount of data such that the next write will
8579 start on an address aligned on REMOTE_ALIGN_WRITES. */
8582 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8584 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8587 /* Write memory data directly to the remote machine.
8588 This does not inform the data cache; the data cache uses this.
8589 HEADER is the starting part of the packet.
8590 MEMADDR is the address in the remote memory space.
8591 MYADDR is the address of the buffer in our space.
8592 LEN_UNITS is the number of addressable units to write.
8593 UNIT_SIZE is the length in bytes of an addressable unit.
8594 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8595 should send data as binary ('X'), or hex-encoded ('M').
8597 The function creates packet of the form
8598 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8600 where encoding of <DATA> is terminated by PACKET_FORMAT.
8602 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8605 Return the transferred status, error or OK (an
8606 'enum target_xfer_status' value). Save the number of addressable units
8607 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8609 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8610 exchange between gdb and the stub could look like (?? in place of the
8616 -> $M1000,3:eeeeffffeeee#??
8620 <- eeeeffffeeeedddd */
8623 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8624 const gdb_byte
*myaddr
,
8627 ULONGEST
*xfered_len_units
,
8628 char packet_format
, int use_length
)
8630 struct remote_state
*rs
= get_remote_state ();
8636 int payload_capacity_bytes
;
8637 int payload_length_bytes
;
8639 if (packet_format
!= 'X' && packet_format
!= 'M')
8640 internal_error (__FILE__
, __LINE__
,
8641 _("remote_write_bytes_aux: bad packet format"));
8644 return TARGET_XFER_EOF
;
8646 payload_capacity_bytes
= get_memory_write_packet_size ();
8648 /* The packet buffer will be large enough for the payload;
8649 get_memory_packet_size ensures this. */
8652 /* Compute the size of the actual payload by subtracting out the
8653 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8655 payload_capacity_bytes
-= strlen ("$,:#NN");
8657 /* The comma won't be used. */
8658 payload_capacity_bytes
+= 1;
8659 payload_capacity_bytes
-= strlen (header
);
8660 payload_capacity_bytes
-= hexnumlen (memaddr
);
8662 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8664 strcat (rs
->buf
.data (), header
);
8665 p
= rs
->buf
.data () + strlen (header
);
8667 /* Compute a best guess of the number of bytes actually transfered. */
8668 if (packet_format
== 'X')
8670 /* Best guess at number of bytes that will fit. */
8671 todo_units
= std::min (len_units
,
8672 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8674 payload_capacity_bytes
-= hexnumlen (todo_units
);
8675 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8679 /* Number of bytes that will fit. */
8681 = std::min (len_units
,
8682 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8684 payload_capacity_bytes
-= hexnumlen (todo_units
);
8685 todo_units
= std::min (todo_units
,
8686 (payload_capacity_bytes
/ unit_size
) / 2);
8689 if (todo_units
<= 0)
8690 internal_error (__FILE__
, __LINE__
,
8691 _("minimum packet size too small to write data"));
8693 /* If we already need another packet, then try to align the end
8694 of this packet to a useful boundary. */
8695 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8696 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8698 /* Append "<memaddr>". */
8699 memaddr
= remote_address_masked (memaddr
);
8700 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8707 /* Append the length and retain its location and size. It may need to be
8708 adjusted once the packet body has been created. */
8710 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8718 /* Append the packet body. */
8719 if (packet_format
== 'X')
8721 /* Binary mode. Send target system values byte by byte, in
8722 increasing byte addresses. Only escape certain critical
8724 payload_length_bytes
=
8725 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8726 &units_written
, payload_capacity_bytes
);
8728 /* If not all TODO units fit, then we'll need another packet. Make
8729 a second try to keep the end of the packet aligned. Don't do
8730 this if the packet is tiny. */
8731 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8735 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8737 if (new_todo_units
!= units_written
)
8738 payload_length_bytes
=
8739 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8740 (gdb_byte
*) p
, &units_written
,
8741 payload_capacity_bytes
);
8744 p
+= payload_length_bytes
;
8745 if (use_length
&& units_written
< todo_units
)
8747 /* Escape chars have filled up the buffer prematurely,
8748 and we have actually sent fewer units than planned.
8749 Fix-up the length field of the packet. Use the same
8750 number of characters as before. */
8751 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8753 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8758 /* Normal mode: Send target system values byte by byte, in
8759 increasing byte addresses. Each byte is encoded as a two hex
8761 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8762 units_written
= todo_units
;
8765 putpkt_binary (rs
->buf
.data (), (int) (p
- rs
->buf
.data ()));
8766 getpkt (&rs
->buf
, 0);
8768 if (rs
->buf
[0] == 'E')
8769 return TARGET_XFER_E_IO
;
8771 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8772 send fewer units than we'd planned. */
8773 *xfered_len_units
= (ULONGEST
) units_written
;
8774 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8777 /* Write memory data directly to the remote machine.
8778 This does not inform the data cache; the data cache uses this.
8779 MEMADDR is the address in the remote memory space.
8780 MYADDR is the address of the buffer in our space.
8781 LEN is the number of bytes.
8783 Return the transferred status, error or OK (an
8784 'enum target_xfer_status' value). Save the number of bytes
8785 transferred in *XFERED_LEN. Only transfer a single packet. */
8788 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
8789 ULONGEST len
, int unit_size
,
8790 ULONGEST
*xfered_len
)
8792 const char *packet_format
= NULL
;
8794 /* Check whether the target supports binary download. */
8795 check_binary_download (memaddr
);
8797 switch (packet_support (PACKET_X
))
8800 packet_format
= "X";
8802 case PACKET_DISABLE
:
8803 packet_format
= "M";
8805 case PACKET_SUPPORT_UNKNOWN
:
8806 internal_error (__FILE__
, __LINE__
,
8807 _("remote_write_bytes: bad internal state"));
8809 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8812 return remote_write_bytes_aux (packet_format
,
8813 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8814 packet_format
[0], 1);
8817 /* Read memory data directly from the remote machine.
8818 This does not use the data cache; the data cache uses this.
8819 MEMADDR is the address in the remote memory space.
8820 MYADDR is the address of the buffer in our space.
8821 LEN_UNITS is the number of addressable memory units to read..
8822 UNIT_SIZE is the length in bytes of an addressable unit.
8824 Return the transferred status, error or OK (an
8825 'enum target_xfer_status' value). Save the number of bytes
8826 transferred in *XFERED_LEN_UNITS.
8828 See the comment of remote_write_bytes_aux for an example of
8829 memory read/write exchange between gdb and the stub. */
8832 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
8834 int unit_size
, ULONGEST
*xfered_len_units
)
8836 struct remote_state
*rs
= get_remote_state ();
8837 int buf_size_bytes
; /* Max size of packet output buffer. */
8842 buf_size_bytes
= get_memory_read_packet_size ();
8843 /* The packet buffer will be large enough for the payload;
8844 get_memory_packet_size ensures this. */
8846 /* Number of units that will fit. */
8847 todo_units
= std::min (len_units
,
8848 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8850 /* Construct "m"<memaddr>","<len>". */
8851 memaddr
= remote_address_masked (memaddr
);
8852 p
= rs
->buf
.data ();
8854 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8856 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8859 getpkt (&rs
->buf
, 0);
8860 if (rs
->buf
[0] == 'E'
8861 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8862 && rs
->buf
[3] == '\0')
8863 return TARGET_XFER_E_IO
;
8864 /* Reply describes memory byte by byte, each byte encoded as two hex
8866 p
= rs
->buf
.data ();
8867 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8868 /* Return what we have. Let higher layers handle partial reads. */
8869 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8870 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8873 /* Using the set of read-only target sections of remote, read live
8876 For interface/parameters/return description see target.h,
8880 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
8884 ULONGEST
*xfered_len
)
8886 struct target_section
*secp
;
8887 struct target_section_table
*table
;
8889 secp
= target_section_by_addr (this, memaddr
);
8891 && (bfd_section_flags (secp
->the_bfd_section
) & SEC_READONLY
))
8893 struct target_section
*p
;
8894 ULONGEST memend
= memaddr
+ len
;
8896 table
= target_get_section_table (this);
8898 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8900 if (memaddr
>= p
->addr
)
8902 if (memend
<= p
->endaddr
)
8904 /* Entire transfer is within this section. */
8905 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8908 else if (memaddr
>= p
->endaddr
)
8910 /* This section ends before the transfer starts. */
8915 /* This section overlaps the transfer. Just do half. */
8916 len
= p
->endaddr
- memaddr
;
8917 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8924 return TARGET_XFER_EOF
;
8927 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8928 first if the requested memory is unavailable in traceframe.
8929 Otherwise, fall back to remote_read_bytes_1. */
8932 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
8933 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8934 ULONGEST
*xfered_len
)
8937 return TARGET_XFER_EOF
;
8939 if (get_traceframe_number () != -1)
8941 std::vector
<mem_range
> available
;
8943 /* If we fail to get the set of available memory, then the
8944 target does not support querying traceframe info, and so we
8945 attempt reading from the traceframe anyway (assuming the
8946 target implements the old QTro packet then). */
8947 if (traceframe_available_memory (&available
, memaddr
, len
))
8949 if (available
.empty () || available
[0].start
!= memaddr
)
8951 enum target_xfer_status res
;
8953 /* Don't read into the traceframe's available
8955 if (!available
.empty ())
8957 LONGEST oldlen
= len
;
8959 len
= available
[0].start
- memaddr
;
8960 gdb_assert (len
<= oldlen
);
8963 /* This goes through the topmost target again. */
8964 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
8965 len
, unit_size
, xfered_len
);
8966 if (res
== TARGET_XFER_OK
)
8967 return TARGET_XFER_OK
;
8970 /* No use trying further, we know some memory starting
8971 at MEMADDR isn't available. */
8973 return (*xfered_len
!= 0) ?
8974 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8978 /* Don't try to read more than how much is available, in
8979 case the target implements the deprecated QTro packet to
8980 cater for older GDBs (the target's knowledge of read-only
8981 sections may be outdated by now). */
8982 len
= available
[0].length
;
8986 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8991 /* Sends a packet with content determined by the printf format string
8992 FORMAT and the remaining arguments, then gets the reply. Returns
8993 whether the packet was a success, a failure, or unknown. */
8996 remote_target::remote_send_printf (const char *format
, ...)
8998 struct remote_state
*rs
= get_remote_state ();
8999 int max_size
= get_remote_packet_size ();
9002 va_start (ap
, format
);
9005 int size
= vsnprintf (rs
->buf
.data (), max_size
, format
, ap
);
9009 if (size
>= max_size
)
9010 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
9012 if (putpkt (rs
->buf
) < 0)
9013 error (_("Communication problem with target."));
9016 getpkt (&rs
->buf
, 0);
9018 return packet_check_result (rs
->buf
);
9021 /* Flash writing can take quite some time. We'll set
9022 effectively infinite timeout for flash operations.
9023 In future, we'll need to decide on a better approach. */
9024 static const int remote_flash_timeout
= 1000;
9027 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
9029 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
9030 enum packet_result ret
;
9031 scoped_restore restore_timeout
9032 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9034 ret
= remote_send_printf ("vFlashErase:%s,%s",
9035 phex (address
, addr_size
),
9039 case PACKET_UNKNOWN
:
9040 error (_("Remote target does not support flash erase"));
9042 error (_("Error erasing flash with vFlashErase packet"));
9049 remote_target::remote_flash_write (ULONGEST address
,
9050 ULONGEST length
, ULONGEST
*xfered_len
,
9051 const gdb_byte
*data
)
9053 scoped_restore restore_timeout
9054 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9055 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
9060 remote_target::flash_done ()
9064 scoped_restore restore_timeout
9065 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
9067 ret
= remote_send_printf ("vFlashDone");
9071 case PACKET_UNKNOWN
:
9072 error (_("Remote target does not support vFlashDone"));
9074 error (_("Error finishing flash operation"));
9081 remote_target::files_info ()
9083 puts_filtered ("Debugging a target over a serial line.\n");
9086 /* Stuff for dealing with the packets which are part of this protocol.
9087 See comment at top of file for details. */
9089 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
9090 error to higher layers. Called when a serial error is detected.
9091 The exception message is STRING, followed by a colon and a blank,
9092 the system error message for errno at function entry and final dot
9093 for output compatibility with throw_perror_with_name. */
9096 unpush_and_perror (remote_target
*target
, const char *string
)
9098 int saved_errno
= errno
;
9100 remote_unpush_target (target
);
9101 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9102 safe_strerror (saved_errno
));
9105 /* Read a single character from the remote end. The current quit
9106 handler is overridden to avoid quitting in the middle of packet
9107 sequence, as that would break communication with the remote server.
9108 See remote_serial_quit_handler for more detail. */
9111 remote_target::readchar (int timeout
)
9114 struct remote_state
*rs
= get_remote_state ();
9117 scoped_restore restore_quit_target
9118 = make_scoped_restore (&curr_quit_handler_target
, this);
9119 scoped_restore restore_quit
9120 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9122 rs
->got_ctrlc_during_io
= 0;
9124 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9126 if (rs
->got_ctrlc_during_io
)
9133 switch ((enum serial_rc
) ch
)
9136 remote_unpush_target (this);
9137 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9140 unpush_and_perror (this, _("Remote communication error. "
9141 "Target disconnected."));
9143 case SERIAL_TIMEOUT
:
9149 /* Wrapper for serial_write that closes the target and throws if
9150 writing fails. The current quit handler is overridden to avoid
9151 quitting in the middle of packet sequence, as that would break
9152 communication with the remote server. See
9153 remote_serial_quit_handler for more detail. */
9156 remote_target::remote_serial_write (const char *str
, int len
)
9158 struct remote_state
*rs
= get_remote_state ();
9160 scoped_restore restore_quit_target
9161 = make_scoped_restore (&curr_quit_handler_target
, this);
9162 scoped_restore restore_quit
9163 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9165 rs
->got_ctrlc_during_io
= 0;
9167 if (serial_write (rs
->remote_desc
, str
, len
))
9169 unpush_and_perror (this, _("Remote communication error. "
9170 "Target disconnected."));
9173 if (rs
->got_ctrlc_during_io
)
9177 /* Return a string representing an escaped version of BUF, of len N.
9178 E.g. \n is converted to \\n, \t to \\t, etc. */
9181 escape_buffer (const char *buf
, int n
)
9185 stb
.putstrn (buf
, n
, '\\');
9186 return std::move (stb
.string ());
9189 /* Display a null-terminated packet on stdout, for debugging, using C
9193 print_packet (const char *buf
)
9195 puts_filtered ("\"");
9196 fputstr_filtered (buf
, '"', gdb_stdout
);
9197 puts_filtered ("\"");
9201 remote_target::putpkt (const char *buf
)
9203 return putpkt_binary (buf
, strlen (buf
));
9206 /* Wrapper around remote_target::putpkt to avoid exporting
9210 putpkt (remote_target
*remote
, const char *buf
)
9212 return remote
->putpkt (buf
);
9215 /* Send a packet to the remote machine, with error checking. The data
9216 of the packet is in BUF. The string in BUF can be at most
9217 get_remote_packet_size () - 5 to account for the $, # and checksum,
9218 and for a possible /0 if we are debugging (remote_debug) and want
9219 to print the sent packet as a string. */
9222 remote_target::putpkt_binary (const char *buf
, int cnt
)
9224 struct remote_state
*rs
= get_remote_state ();
9226 unsigned char csum
= 0;
9227 gdb::def_vector
<char> data (cnt
+ 6);
9228 char *buf2
= data
.data ();
9234 /* Catch cases like trying to read memory or listing threads while
9235 we're waiting for a stop reply. The remote server wouldn't be
9236 ready to handle this request, so we'd hang and timeout. We don't
9237 have to worry about this in synchronous mode, because in that
9238 case it's not possible to issue a command while the target is
9239 running. This is not a problem in non-stop mode, because in that
9240 case, the stub is always ready to process serial input. */
9241 if (!target_is_non_stop_p ()
9242 && target_is_async_p ()
9243 && rs
->waiting_for_stop_reply
)
9245 error (_("Cannot execute this command while the target is running.\n"
9246 "Use the \"interrupt\" command to stop the target\n"
9247 "and then try again."));
9250 /* We're sending out a new packet. Make sure we don't look at a
9251 stale cached response. */
9252 rs
->cached_wait_status
= 0;
9254 /* Copy the packet into buffer BUF2, encapsulating it
9255 and giving it a checksum. */
9260 for (i
= 0; i
< cnt
; i
++)
9266 *p
++ = tohex ((csum
>> 4) & 0xf);
9267 *p
++ = tohex (csum
& 0xf);
9269 /* Send it over and over until we get a positive ack. */
9273 int started_error_output
= 0;
9279 int len
= (int) (p
- buf2
);
9282 if (remote_packet_max_chars
< 0)
9285 max_chars
= remote_packet_max_chars
;
9288 = escape_buffer (buf2
, std::min (len
, max_chars
));
9290 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
9292 if (len
> max_chars
)
9293 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9296 fprintf_unfiltered (gdb_stdlog
, "...");
9298 gdb_flush (gdb_stdlog
);
9300 remote_serial_write (buf2
, p
- buf2
);
9302 /* If this is a no acks version of the remote protocol, send the
9303 packet and move on. */
9307 /* Read until either a timeout occurs (-2) or '+' is read.
9308 Handle any notification that arrives in the mean time. */
9311 ch
= readchar (remote_timeout
);
9319 case SERIAL_TIMEOUT
:
9322 if (started_error_output
)
9324 putchar_unfiltered ('\n');
9325 started_error_output
= 0;
9334 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
9338 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
9340 case SERIAL_TIMEOUT
:
9344 break; /* Retransmit buffer. */
9348 fprintf_unfiltered (gdb_stdlog
,
9349 "Packet instead of Ack, ignoring it\n");
9350 /* It's probably an old response sent because an ACK
9351 was lost. Gobble up the packet and ack it so it
9352 doesn't get retransmitted when we resend this
9355 remote_serial_write ("+", 1);
9356 continue; /* Now, go look for +. */
9363 /* If we got a notification, handle it, and go back to looking
9365 /* We've found the start of a notification. Now
9366 collect the data. */
9367 val
= read_frame (&rs
->buf
);
9372 std::string str
= escape_buffer (rs
->buf
.data (), val
);
9374 fprintf_unfiltered (gdb_stdlog
,
9375 " Notification received: %s\n",
9378 handle_notification (rs
->notif_state
, rs
->buf
.data ());
9379 /* We're in sync now, rewait for the ack. */
9386 if (!started_error_output
)
9388 started_error_output
= 1;
9389 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9391 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9392 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
.data ());
9401 if (!started_error_output
)
9403 started_error_output
= 1;
9404 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9406 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9410 break; /* Here to retransmit. */
9414 /* This is wrong. If doing a long backtrace, the user should be
9415 able to get out next time we call QUIT, without anything as
9416 violent as interrupt_query. If we want to provide a way out of
9417 here without getting to the next QUIT, it should be based on
9418 hitting ^C twice as in remote_wait. */
9430 /* Come here after finding the start of a frame when we expected an
9431 ack. Do our best to discard the rest of this packet. */
9434 remote_target::skip_frame ()
9440 c
= readchar (remote_timeout
);
9443 case SERIAL_TIMEOUT
:
9444 /* Nothing we can do. */
9447 /* Discard the two bytes of checksum and stop. */
9448 c
= readchar (remote_timeout
);
9450 c
= readchar (remote_timeout
);
9453 case '*': /* Run length encoding. */
9454 /* Discard the repeat count. */
9455 c
= readchar (remote_timeout
);
9460 /* A regular character. */
9466 /* Come here after finding the start of the frame. Collect the rest
9467 into *BUF, verifying the checksum, length, and handling run-length
9468 compression. NUL terminate the buffer. If there is not enough room,
9471 Returns -1 on error, number of characters in buffer (ignoring the
9472 trailing NULL) on success. (could be extended to return one of the
9473 SERIAL status indications). */
9476 remote_target::read_frame (gdb::char_vector
*buf_p
)
9481 char *buf
= buf_p
->data ();
9482 struct remote_state
*rs
= get_remote_state ();
9489 c
= readchar (remote_timeout
);
9492 case SERIAL_TIMEOUT
:
9494 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
9498 fputs_filtered ("Saw new packet start in middle of old one\n",
9500 return -1; /* Start a new packet, count retries. */
9503 unsigned char pktcsum
;
9509 check_0
= readchar (remote_timeout
);
9511 check_1
= readchar (remote_timeout
);
9513 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9516 fputs_filtered ("Timeout in checksum, retrying\n",
9520 else if (check_0
< 0 || check_1
< 0)
9523 fputs_filtered ("Communication error in checksum\n",
9528 /* Don't recompute the checksum; with no ack packets we
9529 don't have any way to indicate a packet retransmission
9534 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9535 if (csum
== pktcsum
)
9540 std::string str
= escape_buffer (buf
, bc
);
9542 fprintf_unfiltered (gdb_stdlog
,
9543 "Bad checksum, sentsum=0x%x, "
9544 "csum=0x%x, buf=%s\n",
9545 pktcsum
, csum
, str
.c_str ());
9547 /* Number of characters in buffer ignoring trailing
9551 case '*': /* Run length encoding. */
9556 c
= readchar (remote_timeout
);
9558 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9560 /* The character before ``*'' is repeated. */
9562 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9564 if (bc
+ repeat
- 1 >= buf_p
->size () - 1)
9566 /* Make some more room in the buffer. */
9567 buf_p
->resize (buf_p
->size () + repeat
);
9568 buf
= buf_p
->data ();
9571 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9577 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9581 if (bc
>= buf_p
->size () - 1)
9583 /* Make some more room in the buffer. */
9584 buf_p
->resize (buf_p
->size () * 2);
9585 buf
= buf_p
->data ();
9595 /* Set this to the maximum number of seconds to wait instead of waiting forever
9596 in target_wait(). If this timer times out, then it generates an error and
9597 the command is aborted. This replaces most of the need for timeouts in the
9598 GDB test suite, and makes it possible to distinguish between a hung target
9599 and one with slow communications. */
9601 static int watchdog
= 0;
9603 show_watchdog (struct ui_file
*file
, int from_tty
,
9604 struct cmd_list_element
*c
, const char *value
)
9606 fprintf_filtered (file
, _("Watchdog timer is %s.\n"), value
);
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
9614 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9615 don't have to change all the calls to getpkt to deal with the
9616 return value, because at the moment I don't know what the right
9617 thing to do it for those. */
9620 remote_target::getpkt (gdb::char_vector
*buf
, int forever
)
9622 getpkt_sane (buf
, forever
);
9626 /* Read a packet from the remote machine, with error checking, and
9627 store it in *BUF. Resize *BUF if necessary to hold the result. If
9628 FOREVER, wait forever rather than timing out; this is used (in
9629 synchronous mode) to wait for a target that is is executing user
9630 code to stop. If FOREVER == 0, this function is allowed to time
9631 out gracefully and return an indication of this to the caller.
9632 Otherwise return the number of bytes read. If EXPECTING_NOTIF,
9633 consider receiving a notification enough reason to return to the
9634 caller. *IS_NOTIF is an output boolean that indicates whether *BUF
9635 holds a notification or not (a regular packet). */
9638 remote_target::getpkt_or_notif_sane_1 (gdb::char_vector
*buf
,
9639 int forever
, int expecting_notif
,
9642 struct remote_state
*rs
= get_remote_state ();
9648 /* We're reading a new response. Make sure we don't look at a
9649 previously cached response. */
9650 rs
->cached_wait_status
= 0;
9652 strcpy (buf
->data (), "timeout");
9655 timeout
= watchdog
> 0 ? watchdog
: -1;
9656 else if (expecting_notif
)
9657 timeout
= 0; /* There should already be a char in the buffer. If
9660 timeout
= remote_timeout
;
9664 /* Process any number of notifications, and then return when
9668 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9670 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9672 /* This can loop forever if the remote side sends us
9673 characters continuously, but if it pauses, we'll get
9674 SERIAL_TIMEOUT from readchar because of timeout. Then
9675 we'll count that as a retry.
9677 Note that even when forever is set, we will only wait
9678 forever prior to the start of a packet. After that, we
9679 expect characters to arrive at a brisk pace. They should
9680 show up within remote_timeout intervals. */
9682 c
= readchar (timeout
);
9683 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9685 if (c
== SERIAL_TIMEOUT
)
9687 if (expecting_notif
)
9688 return -1; /* Don't complain, it's normal to not get
9689 anything in this case. */
9691 if (forever
) /* Watchdog went off? Kill the target. */
9693 remote_unpush_target (this);
9694 throw_error (TARGET_CLOSE_ERROR
,
9695 _("Watchdog timeout has expired. "
9696 "Target detached."));
9699 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9703 /* We've found the start of a packet or notification.
9704 Now collect the data. */
9705 val
= read_frame (buf
);
9710 remote_serial_write ("-", 1);
9713 if (tries
> MAX_TRIES
)
9715 /* We have tried hard enough, and just can't receive the
9716 packet/notification. Give up. */
9717 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9719 /* Skip the ack char if we're in no-ack mode. */
9720 if (!rs
->noack_mode
)
9721 remote_serial_write ("+", 1);
9725 /* If we got an ordinary packet, return that to our caller. */
9732 if (remote_packet_max_chars
< 0)
9735 max_chars
= remote_packet_max_chars
;
9738 = escape_buffer (buf
->data (),
9739 std::min (val
, max_chars
));
9741 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9744 if (val
> max_chars
)
9745 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9748 fprintf_unfiltered (gdb_stdlog
, "\n");
9751 /* Skip the ack char if we're in no-ack mode. */
9752 if (!rs
->noack_mode
)
9753 remote_serial_write ("+", 1);
9754 if (is_notif
!= NULL
)
9759 /* If we got a notification, handle it, and go back to looking
9763 gdb_assert (c
== '%');
9767 std::string str
= escape_buffer (buf
->data (), val
);
9769 fprintf_unfiltered (gdb_stdlog
,
9770 " Notification received: %s\n",
9773 if (is_notif
!= NULL
)
9776 handle_notification (rs
->notif_state
, buf
->data ());
9778 /* Notifications require no acknowledgement. */
9780 if (expecting_notif
)
9787 remote_target::getpkt_sane (gdb::char_vector
*buf
, int forever
)
9789 return getpkt_or_notif_sane_1 (buf
, forever
, 0, NULL
);
9793 remote_target::getpkt_or_notif_sane (gdb::char_vector
*buf
, int forever
,
9796 return getpkt_or_notif_sane_1 (buf
, forever
, 1, is_notif
);
9799 /* Kill any new fork children of process PID that haven't been
9800 processed by follow_fork. */
9803 remote_target::kill_new_fork_children (int pid
)
9805 remote_state
*rs
= get_remote_state ();
9806 struct notif_client
*notif
= ¬if_client_stop
;
9808 /* Kill the fork child threads of any threads in process PID
9809 that are stopped at a fork event. */
9810 for (thread_info
*thread
: all_non_exited_threads (this))
9812 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9814 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9816 int child_pid
= ws
->value
.related_pid
.pid ();
9819 res
= remote_vkill (child_pid
);
9821 error (_("Can't kill fork child process %d"), child_pid
);
9825 /* Check for any pending fork events (not reported or processed yet)
9826 in process PID and kill those fork child threads as well. */
9827 remote_notif_get_pending_events (notif
);
9828 for (auto &event
: rs
->stop_reply_queue
)
9829 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
9831 int child_pid
= event
->ws
.value
.related_pid
.pid ();
9834 res
= remote_vkill (child_pid
);
9836 error (_("Can't kill fork child process %d"), child_pid
);
9841 /* Target hook to kill the current inferior. */
9844 remote_target::kill ()
9847 int pid
= inferior_ptid
.pid ();
9848 struct remote_state
*rs
= get_remote_state ();
9850 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9852 /* If we're stopped while forking and we haven't followed yet,
9853 kill the child task. We need to do this before killing the
9854 parent task because if this is a vfork then the parent will
9856 kill_new_fork_children (pid
);
9858 res
= remote_vkill (pid
);
9861 target_mourn_inferior (inferior_ptid
);
9866 /* If we are in 'target remote' mode and we are killing the only
9867 inferior, then we will tell gdbserver to exit and unpush the
9869 if (res
== -1 && !remote_multi_process_p (rs
)
9870 && number_of_live_inferiors (this) == 1)
9874 /* We've killed the remote end, we get to mourn it. If we are
9875 not in extended mode, mourning the inferior also unpushes
9876 remote_ops from the target stack, which closes the remote
9878 target_mourn_inferior (inferior_ptid
);
9883 error (_("Can't kill process"));
9886 /* Send a kill request to the target using the 'vKill' packet. */
9889 remote_target::remote_vkill (int pid
)
9891 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9894 remote_state
*rs
= get_remote_state ();
9896 /* Tell the remote target to detach. */
9897 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "vKill;%x", pid
);
9899 getpkt (&rs
->buf
, 0);
9901 switch (packet_ok (rs
->buf
,
9902 &remote_protocol_packets
[PACKET_vKill
]))
9908 case PACKET_UNKNOWN
:
9911 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9915 /* Send a kill request to the target using the 'k' packet. */
9918 remote_target::remote_kill_k ()
9920 /* Catch errors so the user can quit from gdb even when we
9921 aren't on speaking terms with the remote system. */
9926 catch (const gdb_exception_error
&ex
)
9928 if (ex
.error
== TARGET_CLOSE_ERROR
)
9930 /* If we got an (EOF) error that caused the target
9931 to go away, then we're done, that's what we wanted.
9932 "k" is susceptible to cause a premature EOF, given
9933 that the remote server isn't actually required to
9934 reply to "k", and it can happen that it doesn't
9935 even get to reply ACK to the "k". */
9939 /* Otherwise, something went wrong. We didn't actually kill
9940 the target. Just propagate the exception, and let the
9941 user or higher layers decide what to do. */
9947 remote_target::mourn_inferior ()
9949 struct remote_state
*rs
= get_remote_state ();
9951 /* We're no longer interested in notification events of an inferior
9952 that exited or was killed/detached. */
9953 discard_pending_stop_replies (current_inferior ());
9955 /* In 'target remote' mode with one inferior, we close the connection. */
9956 if (!rs
->extended
&& number_of_live_inferiors (this) <= 1)
9958 remote_unpush_target (this);
9962 /* In case we got here due to an error, but we're going to stay
9964 rs
->waiting_for_stop_reply
= 0;
9966 /* If the current general thread belonged to the process we just
9967 detached from or has exited, the remote side current general
9968 thread becomes undefined. Considering a case like this:
9970 - We just got here due to a detach.
9971 - The process that we're detaching from happens to immediately
9972 report a global breakpoint being hit in non-stop mode, in the
9973 same thread we had selected before.
9974 - GDB attaches to this process again.
9975 - This event happens to be the next event we handle.
9977 GDB would consider that the current general thread didn't need to
9978 be set on the stub side (with Hg), since for all it knew,
9979 GENERAL_THREAD hadn't changed.
9981 Notice that although in all-stop mode, the remote server always
9982 sets the current thread to the thread reporting the stop event,
9983 that doesn't happen in non-stop mode; in non-stop, the stub *must
9984 not* change the current thread when reporting a breakpoint hit,
9985 due to the decoupling of event reporting and event handling.
9987 To keep things simple, we always invalidate our notion of the
9989 record_currthread (rs
, minus_one_ptid
);
9991 /* Call common code to mark the inferior as not running. */
9992 generic_mourn_inferior ();
9996 extended_remote_target::supports_disable_randomization ()
9998 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
10002 remote_target::extended_remote_disable_randomization (int val
)
10004 struct remote_state
*rs
= get_remote_state ();
10007 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10008 "QDisableRandomization:%x", val
);
10010 reply
= remote_get_noisy_reply ();
10011 if (*reply
== '\0')
10012 error (_("Target does not support QDisableRandomization."));
10013 if (strcmp (reply
, "OK") != 0)
10014 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
10018 remote_target::extended_remote_run (const std::string
&args
)
10020 struct remote_state
*rs
= get_remote_state ();
10022 const char *remote_exec_file
= get_remote_exec_file ();
10024 /* If the user has disabled vRun support, or we have detected that
10025 support is not available, do not try it. */
10026 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
10029 strcpy (rs
->buf
.data (), "vRun;");
10030 len
= strlen (rs
->buf
.data ());
10032 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
10033 error (_("Remote file name too long for run packet"));
10034 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
.data () + len
,
10035 strlen (remote_exec_file
));
10037 if (!args
.empty ())
10041 gdb_argv
argv (args
.c_str ());
10042 for (i
= 0; argv
[i
] != NULL
; i
++)
10044 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
10045 error (_("Argument list too long for run packet"));
10046 rs
->buf
[len
++] = ';';
10047 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
.data () + len
,
10052 rs
->buf
[len
++] = '\0';
10055 getpkt (&rs
->buf
, 0);
10057 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
10060 /* We have a wait response. All is well. */
10062 case PACKET_UNKNOWN
:
10065 if (remote_exec_file
[0] == '\0')
10066 error (_("Running the default executable on the remote target failed; "
10067 "try \"set remote exec-file\"?"));
10069 error (_("Running \"%s\" on the remote target failed"),
10072 gdb_assert_not_reached (_("bad switch"));
10076 /* Helper function to send set/unset environment packets. ACTION is
10077 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
10078 or "QEnvironmentUnsetVariable". VALUE is the variable to be
10082 remote_target::send_environment_packet (const char *action
,
10083 const char *packet
,
10086 remote_state
*rs
= get_remote_state ();
10088 /* Convert the environment variable to an hex string, which
10089 is the best format to be transmitted over the wire. */
10090 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10093 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10094 "%s:%s", packet
, encoded_value
.c_str ());
10097 getpkt (&rs
->buf
, 0);
10098 if (strcmp (rs
->buf
.data (), "OK") != 0)
10099 warning (_("Unable to %s environment variable '%s' on remote."),
10103 /* Helper function to handle the QEnvironment* packets. */
10106 remote_target::extended_remote_environment_support ()
10108 remote_state
*rs
= get_remote_state ();
10110 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10112 putpkt ("QEnvironmentReset");
10113 getpkt (&rs
->buf
, 0);
10114 if (strcmp (rs
->buf
.data (), "OK") != 0)
10115 warning (_("Unable to reset environment on remote."));
10118 gdb_environ
*e
= ¤t_inferior ()->environment
;
10120 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10121 for (const std::string
&el
: e
->user_set_env ())
10122 send_environment_packet ("set", "QEnvironmentHexEncoded",
10125 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10126 for (const std::string
&el
: e
->user_unset_env ())
10127 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10130 /* Helper function to set the current working directory for the
10131 inferior in the remote target. */
10134 remote_target::extended_remote_set_inferior_cwd ()
10136 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10138 const char *inferior_cwd
= get_inferior_cwd ();
10139 remote_state
*rs
= get_remote_state ();
10141 if (inferior_cwd
!= NULL
)
10143 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10144 strlen (inferior_cwd
));
10146 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10147 "QSetWorkingDir:%s", hexpath
.c_str ());
10151 /* An empty inferior_cwd means that the user wants us to
10152 reset the remote server's inferior's cwd. */
10153 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10154 "QSetWorkingDir:");
10158 getpkt (&rs
->buf
, 0);
10159 if (packet_ok (rs
->buf
,
10160 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10163 Remote replied unexpectedly while setting the inferior's working\n\
10170 /* In the extended protocol we want to be able to do things like
10171 "run" and have them basically work as expected. So we need
10172 a special create_inferior function. We support changing the
10173 executable file and the command line arguments, but not the
10177 extended_remote_target::create_inferior (const char *exec_file
,
10178 const std::string
&args
,
10179 char **env
, int from_tty
)
10183 struct remote_state
*rs
= get_remote_state ();
10184 const char *remote_exec_file
= get_remote_exec_file ();
10186 /* If running asynchronously, register the target file descriptor
10187 with the event loop. */
10188 if (target_can_async_p ())
10191 /* Disable address space randomization if requested (and supported). */
10192 if (supports_disable_randomization ())
10193 extended_remote_disable_randomization (disable_randomization
);
10195 /* If startup-with-shell is on, we inform gdbserver to start the
10196 remote inferior using a shell. */
10197 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10199 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
10200 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10202 getpkt (&rs
->buf
, 0);
10203 if (strcmp (rs
->buf
.data (), "OK") != 0)
10205 Remote replied unexpectedly while setting startup-with-shell: %s"),
10209 extended_remote_environment_support ();
10211 extended_remote_set_inferior_cwd ();
10213 /* Now restart the remote server. */
10214 run_worked
= extended_remote_run (args
) != -1;
10217 /* vRun was not supported. Fail if we need it to do what the
10219 if (remote_exec_file
[0])
10220 error (_("Remote target does not support \"set remote exec-file\""));
10221 if (!args
.empty ())
10222 error (_("Remote target does not support \"set args\" or run ARGS"));
10224 /* Fall back to "R". */
10225 extended_remote_restart ();
10228 /* vRun's success return is a stop reply. */
10229 stop_reply
= run_worked
? rs
->buf
.data () : NULL
;
10230 add_current_inferior_and_thread (stop_reply
);
10232 /* Get updated offsets, if the stub uses qOffsets. */
10237 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10238 the list of conditions (in agent expression bytecode format), if any, the
10239 target needs to evaluate. The output is placed into the packet buffer
10240 started from BUF and ended at BUF_END. */
10243 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10244 struct bp_target_info
*bp_tgt
, char *buf
,
10247 if (bp_tgt
->conditions
.empty ())
10250 buf
+= strlen (buf
);
10251 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10254 /* Send conditions to the target. */
10255 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10257 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10258 buf
+= strlen (buf
);
10259 for (int i
= 0; i
< aexpr
->len
; ++i
)
10260 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10267 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10268 struct bp_target_info
*bp_tgt
, char *buf
)
10270 if (bp_tgt
->tcommands
.empty ())
10273 buf
+= strlen (buf
);
10275 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10276 buf
+= strlen (buf
);
10278 /* Concatenate all the agent expressions that are commands into the
10280 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10282 sprintf (buf
, "X%x,", aexpr
->len
);
10283 buf
+= strlen (buf
);
10284 for (int i
= 0; i
< aexpr
->len
; ++i
)
10285 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10290 /* Insert a breakpoint. On targets that have software breakpoint
10291 support, we ask the remote target to do the work; on targets
10292 which don't, we insert a traditional memory breakpoint. */
10295 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10296 struct bp_target_info
*bp_tgt
)
10298 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10299 If it succeeds, then set the support to PACKET_ENABLE. If it
10300 fails, and the user has explicitly requested the Z support then
10301 report an error, otherwise, mark it disabled and go on. */
10303 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10305 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10306 struct remote_state
*rs
;
10309 /* Make sure the remote is pointing at the right process, if
10311 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10312 set_general_process ();
10314 rs
= get_remote_state ();
10315 p
= rs
->buf
.data ();
10316 endbuf
= p
+ get_remote_packet_size ();
10321 addr
= (ULONGEST
) remote_address_masked (addr
);
10322 p
+= hexnumstr (p
, addr
);
10323 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10325 if (supports_evaluation_of_breakpoint_conditions ())
10326 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10328 if (can_run_breakpoint_commands ())
10329 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10332 getpkt (&rs
->buf
, 0);
10334 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10340 case PACKET_UNKNOWN
:
10345 /* If this breakpoint has target-side commands but this stub doesn't
10346 support Z0 packets, throw error. */
10347 if (!bp_tgt
->tcommands
.empty ())
10348 throw_error (NOT_SUPPORTED_ERROR
, _("\
10349 Target doesn't support breakpoints that have target side commands."));
10351 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10355 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10356 struct bp_target_info
*bp_tgt
,
10357 enum remove_bp_reason reason
)
10359 CORE_ADDR addr
= bp_tgt
->placed_address
;
10360 struct remote_state
*rs
= get_remote_state ();
10362 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10364 char *p
= rs
->buf
.data ();
10365 char *endbuf
= p
+ get_remote_packet_size ();
10367 /* Make sure the remote is pointing at the right process, if
10369 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10370 set_general_process ();
10376 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10377 p
+= hexnumstr (p
, addr
);
10378 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10381 getpkt (&rs
->buf
, 0);
10383 return (rs
->buf
[0] == 'E');
10386 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10389 static enum Z_packet_type
10390 watchpoint_to_Z_packet (int type
)
10395 return Z_PACKET_WRITE_WP
;
10398 return Z_PACKET_READ_WP
;
10401 return Z_PACKET_ACCESS_WP
;
10404 internal_error (__FILE__
, __LINE__
,
10405 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10410 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10411 enum target_hw_bp_type type
, struct expression
*cond
)
10413 struct remote_state
*rs
= get_remote_state ();
10414 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10416 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10418 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10421 /* Make sure the remote is pointing at the right process, if
10423 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10424 set_general_process ();
10426 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "Z%x,", packet
);
10427 p
= strchr (rs
->buf
.data (), '\0');
10428 addr
= remote_address_masked (addr
);
10429 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10430 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10433 getpkt (&rs
->buf
, 0);
10435 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10439 case PACKET_UNKNOWN
:
10444 internal_error (__FILE__
, __LINE__
,
10445 _("remote_insert_watchpoint: reached end of function"));
10449 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10450 CORE_ADDR start
, int length
)
10452 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10454 return diff
< length
;
10459 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10460 enum target_hw_bp_type type
, struct expression
*cond
)
10462 struct remote_state
*rs
= get_remote_state ();
10463 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
10465 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10467 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10470 /* Make sure the remote is pointing at the right process, if
10472 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10473 set_general_process ();
10475 xsnprintf (rs
->buf
.data (), endbuf
- rs
->buf
.data (), "z%x,", packet
);
10476 p
= strchr (rs
->buf
.data (), '\0');
10477 addr
= remote_address_masked (addr
);
10478 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10479 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10481 getpkt (&rs
->buf
, 0);
10483 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10486 case PACKET_UNKNOWN
:
10491 internal_error (__FILE__
, __LINE__
,
10492 _("remote_remove_watchpoint: reached end of function"));
10496 static int remote_hw_watchpoint_limit
= -1;
10497 static int remote_hw_watchpoint_length_limit
= -1;
10498 static int remote_hw_breakpoint_limit
= -1;
10501 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10503 if (remote_hw_watchpoint_length_limit
== 0)
10505 else if (remote_hw_watchpoint_length_limit
< 0)
10507 else if (len
<= remote_hw_watchpoint_length_limit
)
10514 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10516 if (type
== bp_hardware_breakpoint
)
10518 if (remote_hw_breakpoint_limit
== 0)
10520 else if (remote_hw_breakpoint_limit
< 0)
10522 else if (cnt
<= remote_hw_breakpoint_limit
)
10527 if (remote_hw_watchpoint_limit
== 0)
10529 else if (remote_hw_watchpoint_limit
< 0)
10533 else if (cnt
<= remote_hw_watchpoint_limit
)
10539 /* The to_stopped_by_sw_breakpoint method of target remote. */
10542 remote_target::stopped_by_sw_breakpoint ()
10544 struct thread_info
*thread
= inferior_thread ();
10546 return (thread
->priv
!= NULL
10547 && (get_remote_thread_info (thread
)->stop_reason
10548 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10551 /* The to_supports_stopped_by_sw_breakpoint method of target
10555 remote_target::supports_stopped_by_sw_breakpoint ()
10557 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10560 /* The to_stopped_by_hw_breakpoint method of target remote. */
10563 remote_target::stopped_by_hw_breakpoint ()
10565 struct thread_info
*thread
= inferior_thread ();
10567 return (thread
->priv
!= NULL
10568 && (get_remote_thread_info (thread
)->stop_reason
10569 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10572 /* The to_supports_stopped_by_hw_breakpoint method of target
10576 remote_target::supports_stopped_by_hw_breakpoint ()
10578 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10582 remote_target::stopped_by_watchpoint ()
10584 struct thread_info
*thread
= inferior_thread ();
10586 return (thread
->priv
!= NULL
10587 && (get_remote_thread_info (thread
)->stop_reason
10588 == TARGET_STOPPED_BY_WATCHPOINT
));
10592 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10594 struct thread_info
*thread
= inferior_thread ();
10596 if (thread
->priv
!= NULL
10597 && (get_remote_thread_info (thread
)->stop_reason
10598 == TARGET_STOPPED_BY_WATCHPOINT
))
10600 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10609 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10610 struct bp_target_info
*bp_tgt
)
10612 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10613 struct remote_state
*rs
;
10617 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10620 /* Make sure the remote is pointing at the right process, if
10622 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10623 set_general_process ();
10625 rs
= get_remote_state ();
10626 p
= rs
->buf
.data ();
10627 endbuf
= p
+ get_remote_packet_size ();
10633 addr
= remote_address_masked (addr
);
10634 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10635 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10637 if (supports_evaluation_of_breakpoint_conditions ())
10638 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10640 if (can_run_breakpoint_commands ())
10641 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10644 getpkt (&rs
->buf
, 0);
10646 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10649 if (rs
->buf
[1] == '.')
10651 message
= strchr (&rs
->buf
[2], '.');
10653 error (_("Remote failure reply: %s"), message
+ 1);
10656 case PACKET_UNKNOWN
:
10661 internal_error (__FILE__
, __LINE__
,
10662 _("remote_insert_hw_breakpoint: reached end of function"));
10667 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10668 struct bp_target_info
*bp_tgt
)
10671 struct remote_state
*rs
= get_remote_state ();
10672 char *p
= rs
->buf
.data ();
10673 char *endbuf
= p
+ get_remote_packet_size ();
10675 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10678 /* Make sure the remote is pointing at the right process, if
10680 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10681 set_general_process ();
10687 addr
= remote_address_masked (bp_tgt
->placed_address
);
10688 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10689 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10692 getpkt (&rs
->buf
, 0);
10694 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10697 case PACKET_UNKNOWN
:
10702 internal_error (__FILE__
, __LINE__
,
10703 _("remote_remove_hw_breakpoint: reached end of function"));
10706 /* Verify memory using the "qCRC:" request. */
10709 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10711 struct remote_state
*rs
= get_remote_state ();
10712 unsigned long host_crc
, target_crc
;
10715 /* It doesn't make sense to use qCRC if the remote target is
10716 connected but not running. */
10717 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10719 enum packet_result result
;
10721 /* Make sure the remote is pointing at the right process. */
10722 set_general_process ();
10724 /* FIXME: assumes lma can fit into long. */
10725 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qCRC:%lx,%lx",
10726 (long) lma
, (long) size
);
10729 /* Be clever; compute the host_crc before waiting for target
10731 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10733 getpkt (&rs
->buf
, 0);
10735 result
= packet_ok (rs
->buf
,
10736 &remote_protocol_packets
[PACKET_qCRC
]);
10737 if (result
== PACKET_ERROR
)
10739 else if (result
== PACKET_OK
)
10741 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10742 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10744 return (host_crc
== target_crc
);
10748 return simple_verify_memory (this, data
, lma
, size
);
10751 /* compare-sections command
10753 With no arguments, compares each loadable section in the exec bfd
10754 with the same memory range on the target, and reports mismatches.
10755 Useful for verifying the image on the target against the exec file. */
10758 compare_sections_command (const char *args
, int from_tty
)
10761 const char *sectname
;
10762 bfd_size_type size
;
10765 int mismatched
= 0;
10770 error (_("command cannot be used without an exec file"));
10772 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10778 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10780 if (!(s
->flags
& SEC_LOAD
))
10781 continue; /* Skip non-loadable section. */
10783 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10784 continue; /* Skip writeable sections */
10786 size
= bfd_section_size (s
);
10788 continue; /* Skip zero-length section. */
10790 sectname
= bfd_section_name (s
);
10791 if (args
&& strcmp (args
, sectname
) != 0)
10792 continue; /* Not the section selected by user. */
10794 matched
= 1; /* Do this section. */
10797 gdb::byte_vector
sectdata (size
);
10798 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10800 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10803 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10804 paddress (target_gdbarch (), lma
),
10805 paddress (target_gdbarch (), lma
+ size
));
10807 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10808 paddress (target_gdbarch (), lma
),
10809 paddress (target_gdbarch (), lma
+ size
));
10811 printf_filtered ("matched.\n");
10814 printf_filtered ("MIS-MATCHED!\n");
10818 if (mismatched
> 0)
10819 warning (_("One or more sections of the target image does not match\n\
10820 the loaded file\n"));
10821 if (args
&& !matched
)
10822 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10825 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10826 into remote target. The number of bytes written to the remote
10827 target is returned, or -1 for error. */
10830 remote_target::remote_write_qxfer (const char *object_name
,
10831 const char *annex
, const gdb_byte
*writebuf
,
10832 ULONGEST offset
, LONGEST len
,
10833 ULONGEST
*xfered_len
,
10834 struct packet_config
*packet
)
10838 struct remote_state
*rs
= get_remote_state ();
10839 int max_size
= get_memory_write_packet_size ();
10841 if (packet_config_support (packet
) == PACKET_DISABLE
)
10842 return TARGET_XFER_E_IO
;
10844 /* Insert header. */
10845 i
= snprintf (rs
->buf
.data (), max_size
,
10846 "qXfer:%s:write:%s:%s:",
10847 object_name
, annex
? annex
: "",
10848 phex_nz (offset
, sizeof offset
));
10849 max_size
-= (i
+ 1);
10851 /* Escape as much data as fits into rs->buf. */
10852 buf_len
= remote_escape_output
10853 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
.data () + i
, &max_size
, max_size
);
10855 if (putpkt_binary (rs
->buf
.data (), i
+ buf_len
) < 0
10856 || getpkt_sane (&rs
->buf
, 0) < 0
10857 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10858 return TARGET_XFER_E_IO
;
10860 unpack_varlen_hex (rs
->buf
.data (), &n
);
10863 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10866 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10867 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10868 number of bytes read is returned, or 0 for EOF, or -1 for error.
10869 The number of bytes read may be less than LEN without indicating an
10870 EOF. PACKET is checked and updated to indicate whether the remote
10871 target supports this object. */
10874 remote_target::remote_read_qxfer (const char *object_name
,
10876 gdb_byte
*readbuf
, ULONGEST offset
,
10878 ULONGEST
*xfered_len
,
10879 struct packet_config
*packet
)
10881 struct remote_state
*rs
= get_remote_state ();
10882 LONGEST i
, n
, packet_len
;
10884 if (packet_config_support (packet
) == PACKET_DISABLE
)
10885 return TARGET_XFER_E_IO
;
10887 /* Check whether we've cached an end-of-object packet that matches
10889 if (rs
->finished_object
)
10891 if (strcmp (object_name
, rs
->finished_object
) == 0
10892 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10893 && offset
== rs
->finished_offset
)
10894 return TARGET_XFER_EOF
;
10897 /* Otherwise, we're now reading something different. Discard
10899 xfree (rs
->finished_object
);
10900 xfree (rs
->finished_annex
);
10901 rs
->finished_object
= NULL
;
10902 rs
->finished_annex
= NULL
;
10905 /* Request only enough to fit in a single packet. The actual data
10906 may not, since we don't know how much of it will need to be escaped;
10907 the target is free to respond with slightly less data. We subtract
10908 five to account for the response type and the protocol frame. */
10909 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10910 snprintf (rs
->buf
.data (), get_remote_packet_size () - 4,
10911 "qXfer:%s:read:%s:%s,%s",
10912 object_name
, annex
? annex
: "",
10913 phex_nz (offset
, sizeof offset
),
10914 phex_nz (n
, sizeof n
));
10915 i
= putpkt (rs
->buf
);
10917 return TARGET_XFER_E_IO
;
10920 packet_len
= getpkt_sane (&rs
->buf
, 0);
10921 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10922 return TARGET_XFER_E_IO
;
10924 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10925 error (_("Unknown remote qXfer reply: %s"), rs
->buf
.data ());
10927 /* 'm' means there is (or at least might be) more data after this
10928 batch. That does not make sense unless there's at least one byte
10929 of data in this reply. */
10930 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10931 error (_("Remote qXfer reply contained no data."));
10933 /* Got some data. */
10934 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
.data () + 1,
10935 packet_len
- 1, readbuf
, n
);
10937 /* 'l' is an EOF marker, possibly including a final block of data,
10938 or possibly empty. If we have the final block of a non-empty
10939 object, record this fact to bypass a subsequent partial read. */
10940 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10942 rs
->finished_object
= xstrdup (object_name
);
10943 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10944 rs
->finished_offset
= offset
+ i
;
10948 return TARGET_XFER_EOF
;
10952 return TARGET_XFER_OK
;
10956 enum target_xfer_status
10957 remote_target::xfer_partial (enum target_object object
,
10958 const char *annex
, gdb_byte
*readbuf
,
10959 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10960 ULONGEST
*xfered_len
)
10962 struct remote_state
*rs
;
10966 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10968 set_remote_traceframe ();
10969 set_general_thread (inferior_ptid
);
10971 rs
= get_remote_state ();
10973 /* Handle memory using the standard memory routines. */
10974 if (object
== TARGET_OBJECT_MEMORY
)
10976 /* If the remote target is connected but not running, we should
10977 pass this request down to a lower stratum (e.g. the executable
10979 if (!target_has_execution
)
10980 return TARGET_XFER_EOF
;
10982 if (writebuf
!= NULL
)
10983 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10986 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
10990 /* Handle extra signal info using qxfer packets. */
10991 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10994 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
10995 xfered_len
, &remote_protocol_packets
10996 [PACKET_qXfer_siginfo_read
]);
10998 return remote_write_qxfer ("siginfo", annex
,
10999 writebuf
, offset
, len
, xfered_len
,
11000 &remote_protocol_packets
11001 [PACKET_qXfer_siginfo_write
]);
11004 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
11007 return remote_read_qxfer ("statictrace", annex
,
11008 readbuf
, offset
, len
, xfered_len
,
11009 &remote_protocol_packets
11010 [PACKET_qXfer_statictrace_read
]);
11012 return TARGET_XFER_E_IO
;
11015 /* Only handle flash writes. */
11016 if (writebuf
!= NULL
)
11020 case TARGET_OBJECT_FLASH
:
11021 return remote_flash_write (offset
, len
, xfered_len
,
11025 return TARGET_XFER_E_IO
;
11029 /* Map pre-existing objects onto letters. DO NOT do this for new
11030 objects!!! Instead specify new query packets. */
11033 case TARGET_OBJECT_AVR
:
11037 case TARGET_OBJECT_AUXV
:
11038 gdb_assert (annex
== NULL
);
11039 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
11041 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
11043 case TARGET_OBJECT_AVAILABLE_FEATURES
:
11044 return remote_read_qxfer
11045 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
11046 &remote_protocol_packets
[PACKET_qXfer_features
]);
11048 case TARGET_OBJECT_LIBRARIES
:
11049 return remote_read_qxfer
11050 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
11051 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
11053 case TARGET_OBJECT_LIBRARIES_SVR4
:
11054 return remote_read_qxfer
11055 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
11056 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
11058 case TARGET_OBJECT_MEMORY_MAP
:
11059 gdb_assert (annex
== NULL
);
11060 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
11062 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
11064 case TARGET_OBJECT_OSDATA
:
11065 /* Should only get here if we're connected. */
11066 gdb_assert (rs
->remote_desc
);
11067 return remote_read_qxfer
11068 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
11069 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
11071 case TARGET_OBJECT_THREADS
:
11072 gdb_assert (annex
== NULL
);
11073 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
11075 &remote_protocol_packets
[PACKET_qXfer_threads
]);
11077 case TARGET_OBJECT_TRACEFRAME_INFO
:
11078 gdb_assert (annex
== NULL
);
11079 return remote_read_qxfer
11080 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11081 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11083 case TARGET_OBJECT_FDPIC
:
11084 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11086 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11088 case TARGET_OBJECT_OPENVMS_UIB
:
11089 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11091 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11093 case TARGET_OBJECT_BTRACE
:
11094 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11096 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11098 case TARGET_OBJECT_BTRACE_CONF
:
11099 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11101 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11103 case TARGET_OBJECT_EXEC_FILE
:
11104 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11106 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11109 return TARGET_XFER_E_IO
;
11112 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11113 large enough let the caller deal with it. */
11114 if (len
< get_remote_packet_size ())
11115 return TARGET_XFER_E_IO
;
11116 len
= get_remote_packet_size ();
11118 /* Except for querying the minimum buffer size, target must be open. */
11119 if (!rs
->remote_desc
)
11120 error (_("remote query is only available after target open"));
11122 gdb_assert (annex
!= NULL
);
11123 gdb_assert (readbuf
!= NULL
);
11125 p2
= rs
->buf
.data ();
11127 *p2
++ = query_type
;
11129 /* We used one buffer char for the remote protocol q command and
11130 another for the query type. As the remote protocol encapsulation
11131 uses 4 chars plus one extra in case we are debugging
11132 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11135 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11137 /* Bad caller may have sent forbidden characters. */
11138 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11143 gdb_assert (annex
[i
] == '\0');
11145 i
= putpkt (rs
->buf
);
11147 return TARGET_XFER_E_IO
;
11149 getpkt (&rs
->buf
, 0);
11150 strcpy ((char *) readbuf
, rs
->buf
.data ());
11152 *xfered_len
= strlen ((char *) readbuf
);
11153 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11156 /* Implementation of to_get_memory_xfer_limit. */
11159 remote_target::get_memory_xfer_limit ()
11161 return get_memory_write_packet_size ();
11165 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11166 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11167 CORE_ADDR
*found_addrp
)
11169 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11170 struct remote_state
*rs
= get_remote_state ();
11171 int max_size
= get_memory_write_packet_size ();
11172 struct packet_config
*packet
=
11173 &remote_protocol_packets
[PACKET_qSearch_memory
];
11174 /* Number of packet bytes used to encode the pattern;
11175 this could be more than PATTERN_LEN due to escape characters. */
11176 int escaped_pattern_len
;
11177 /* Amount of pattern that was encodable in the packet. */
11178 int used_pattern_len
;
11181 ULONGEST found_addr
;
11183 /* Don't go to the target if we don't have to. This is done before
11184 checking packet_config_support to avoid the possibility that a
11185 success for this edge case means the facility works in
11187 if (pattern_len
> search_space_len
)
11189 if (pattern_len
== 0)
11191 *found_addrp
= start_addr
;
11195 /* If we already know the packet isn't supported, fall back to the simple
11196 way of searching memory. */
11198 if (packet_config_support (packet
) == PACKET_DISABLE
)
11200 /* Target doesn't provided special support, fall back and use the
11201 standard support (copy memory and do the search here). */
11202 return simple_search_memory (this, start_addr
, search_space_len
,
11203 pattern
, pattern_len
, found_addrp
);
11206 /* Make sure the remote is pointing at the right process. */
11207 set_general_process ();
11209 /* Insert header. */
11210 i
= snprintf (rs
->buf
.data (), max_size
,
11211 "qSearch:memory:%s;%s;",
11212 phex_nz (start_addr
, addr_size
),
11213 phex_nz (search_space_len
, sizeof (search_space_len
)));
11214 max_size
-= (i
+ 1);
11216 /* Escape as much data as fits into rs->buf. */
11217 escaped_pattern_len
=
11218 remote_escape_output (pattern
, pattern_len
, 1,
11219 (gdb_byte
*) rs
->buf
.data () + i
,
11220 &used_pattern_len
, max_size
);
11222 /* Bail if the pattern is too large. */
11223 if (used_pattern_len
!= pattern_len
)
11224 error (_("Pattern is too large to transmit to remote target."));
11226 if (putpkt_binary (rs
->buf
.data (), i
+ escaped_pattern_len
) < 0
11227 || getpkt_sane (&rs
->buf
, 0) < 0
11228 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11230 /* The request may not have worked because the command is not
11231 supported. If so, fall back to the simple way. */
11232 if (packet_config_support (packet
) == PACKET_DISABLE
)
11234 return simple_search_memory (this, start_addr
, search_space_len
,
11235 pattern
, pattern_len
, found_addrp
);
11240 if (rs
->buf
[0] == '0')
11242 else if (rs
->buf
[0] == '1')
11245 if (rs
->buf
[1] != ',')
11246 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11247 unpack_varlen_hex (&rs
->buf
[2], &found_addr
);
11248 *found_addrp
= found_addr
;
11251 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
.data ());
11257 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11259 struct remote_state
*rs
= get_remote_state ();
11260 char *p
= rs
->buf
.data ();
11262 if (!rs
->remote_desc
)
11263 error (_("remote rcmd is only available after target open"));
11265 /* Send a NULL command across as an empty command. */
11266 if (command
== NULL
)
11269 /* The query prefix. */
11270 strcpy (rs
->buf
.data (), "qRcmd,");
11271 p
= strchr (rs
->buf
.data (), '\0');
11273 if ((strlen (rs
->buf
.data ()) + strlen (command
) * 2 + 8/*misc*/)
11274 > get_remote_packet_size ())
11275 error (_("\"monitor\" command ``%s'' is too long."), command
);
11277 /* Encode the actual command. */
11278 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11280 if (putpkt (rs
->buf
) < 0)
11281 error (_("Communication problem with target."));
11283 /* get/display the response */
11288 /* XXX - see also remote_get_noisy_reply(). */
11289 QUIT
; /* Allow user to bail out with ^C. */
11291 if (getpkt_sane (&rs
->buf
, 0) == -1)
11293 /* Timeout. Continue to (try to) read responses.
11294 This is better than stopping with an error, assuming the stub
11295 is still executing the (long) monitor command.
11296 If needed, the user can interrupt gdb using C-c, obtaining
11297 an effect similar to stop on timeout. */
11300 buf
= rs
->buf
.data ();
11301 if (buf
[0] == '\0')
11302 error (_("Target does not support this command."));
11303 if (buf
[0] == 'O' && buf
[1] != 'K')
11305 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11308 if (strcmp (buf
, "OK") == 0)
11310 if (strlen (buf
) == 3 && buf
[0] == 'E'
11311 && isdigit (buf
[1]) && isdigit (buf
[2]))
11313 error (_("Protocol error with Rcmd"));
11315 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11317 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11319 fputc_unfiltered (c
, outbuf
);
11325 std::vector
<mem_region
>
11326 remote_target::memory_map ()
11328 std::vector
<mem_region
> result
;
11329 gdb::optional
<gdb::char_vector
> text
11330 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP
, NULL
);
11333 result
= parse_memory_map (text
->data ());
11339 packet_command (const char *args
, int from_tty
)
11341 remote_target
*remote
= get_current_remote_target ();
11343 if (remote
== nullptr)
11344 error (_("command can only be used with remote target"));
11346 remote
->packet_command (args
, from_tty
);
11350 remote_target::packet_command (const char *args
, int from_tty
)
11353 error (_("remote-packet command requires packet text as argument"));
11355 puts_filtered ("sending: ");
11356 print_packet (args
);
11357 puts_filtered ("\n");
11360 remote_state
*rs
= get_remote_state ();
11362 getpkt (&rs
->buf
, 0);
11363 puts_filtered ("received: ");
11364 print_packet (rs
->buf
.data ());
11365 puts_filtered ("\n");
11369 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11371 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11373 static void threadset_test_cmd (char *cmd
, int tty
);
11375 static void threadalive_test (char *cmd
, int tty
);
11377 static void threadlist_test_cmd (char *cmd
, int tty
);
11379 int get_and_display_threadinfo (threadref
*ref
);
11381 static void threadinfo_test_cmd (char *cmd
, int tty
);
11383 static int thread_display_step (threadref
*ref
, void *context
);
11385 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11387 static void init_remote_threadtests (void);
11389 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11392 threadset_test_cmd (const char *cmd
, int tty
)
11394 int sample_thread
= SAMPLE_THREAD
;
11396 printf_filtered (_("Remote threadset test\n"));
11397 set_general_thread (sample_thread
);
11402 threadalive_test (const char *cmd
, int tty
)
11404 int sample_thread
= SAMPLE_THREAD
;
11405 int pid
= inferior_ptid
.pid ();
11406 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11408 if (remote_thread_alive (ptid
))
11409 printf_filtered ("PASS: Thread alive test\n");
11411 printf_filtered ("FAIL: Thread alive test\n");
11414 void output_threadid (char *title
, threadref
*ref
);
11417 output_threadid (char *title
, threadref
*ref
)
11421 pack_threadid (&hexid
[0], ref
); /* Convert thread id into hex. */
11423 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11427 threadlist_test_cmd (const char *cmd
, int tty
)
11430 threadref nextthread
;
11431 int done
, result_count
;
11432 threadref threadlist
[3];
11434 printf_filtered ("Remote Threadlist test\n");
11435 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11436 &result_count
, &threadlist
[0]))
11437 printf_filtered ("FAIL: threadlist test\n");
11440 threadref
*scan
= threadlist
;
11441 threadref
*limit
= scan
+ result_count
;
11443 while (scan
< limit
)
11444 output_threadid (" thread ", scan
++);
11449 display_thread_info (struct gdb_ext_thread_info
*info
)
11451 output_threadid ("Threadid: ", &info
->threadid
);
11452 printf_filtered ("Name: %s\n ", info
->shortname
);
11453 printf_filtered ("State: %s\n", info
->display
);
11454 printf_filtered ("other: %s\n\n", info
->more_display
);
11458 get_and_display_threadinfo (threadref
*ref
)
11462 struct gdb_ext_thread_info threadinfo
;
11464 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11465 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11466 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11467 display_thread_info (&threadinfo
);
11472 threadinfo_test_cmd (const char *cmd
, int tty
)
11474 int athread
= SAMPLE_THREAD
;
11478 int_to_threadref (&thread
, athread
);
11479 printf_filtered ("Remote Threadinfo test\n");
11480 if (!get_and_display_threadinfo (&thread
))
11481 printf_filtered ("FAIL cannot get thread info\n");
11485 thread_display_step (threadref
*ref
, void *context
)
11487 /* output_threadid(" threadstep ",ref); *//* simple test */
11488 return get_and_display_threadinfo (ref
);
11492 threadlist_update_test_cmd (const char *cmd
, int tty
)
11494 printf_filtered ("Remote Threadlist update test\n");
11495 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11499 init_remote_threadtests (void)
11501 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11502 _("Fetch and print the remote list of "
11503 "thread identifiers, one pkt only."));
11504 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11505 _("Fetch and display info about one thread."));
11506 add_com ("tset", class_obscure
, threadset_test_cmd
,
11507 _("Test setting to a different thread."));
11508 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11509 _("Iterate through updating all remote thread info."));
11510 add_com ("talive", class_obscure
, threadalive_test
,
11511 _("Remote thread alive test."));
11516 /* Convert a thread ID to a string. */
11519 remote_target::pid_to_str (ptid_t ptid
)
11521 struct remote_state
*rs
= get_remote_state ();
11523 if (ptid
== null_ptid
)
11524 return normal_pid_to_str (ptid
);
11525 else if (ptid
.is_pid ())
11527 /* Printing an inferior target id. */
11529 /* When multi-process extensions are off, there's no way in the
11530 remote protocol to know the remote process id, if there's any
11531 at all. There's one exception --- when we're connected with
11532 target extended-remote, and we manually attached to a process
11533 with "attach PID". We don't record anywhere a flag that
11534 allows us to distinguish that case from the case of
11535 connecting with extended-remote and the stub already being
11536 attached to a process, and reporting yes to qAttached, hence
11537 no smart special casing here. */
11538 if (!remote_multi_process_p (rs
))
11539 return "Remote target";
11541 return normal_pid_to_str (ptid
);
11545 if (magic_null_ptid
== ptid
)
11546 return "Thread <main>";
11547 else if (remote_multi_process_p (rs
))
11548 if (ptid
.lwp () == 0)
11549 return normal_pid_to_str (ptid
);
11551 return string_printf ("Thread %d.%ld",
11552 ptid
.pid (), ptid
.lwp ());
11554 return string_printf ("Thread %ld", ptid
.lwp ());
11558 /* Get the address of the thread local variable in OBJFILE which is
11559 stored at OFFSET within the thread local storage for thread PTID. */
11562 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11565 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11567 struct remote_state
*rs
= get_remote_state ();
11568 char *p
= rs
->buf
.data ();
11569 char *endp
= p
+ get_remote_packet_size ();
11570 enum packet_result result
;
11572 strcpy (p
, "qGetTLSAddr:");
11574 p
= write_ptid (p
, endp
, ptid
);
11576 p
+= hexnumstr (p
, offset
);
11578 p
+= hexnumstr (p
, lm
);
11582 getpkt (&rs
->buf
, 0);
11583 result
= packet_ok (rs
->buf
,
11584 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11585 if (result
== PACKET_OK
)
11589 unpack_varlen_hex (rs
->buf
.data (), &addr
);
11592 else if (result
== PACKET_UNKNOWN
)
11593 throw_error (TLS_GENERIC_ERROR
,
11594 _("Remote target doesn't support qGetTLSAddr packet"));
11596 throw_error (TLS_GENERIC_ERROR
,
11597 _("Remote target failed to process qGetTLSAddr request"));
11600 throw_error (TLS_GENERIC_ERROR
,
11601 _("TLS not supported or disabled on this target"));
11606 /* Provide thread local base, i.e. Thread Information Block address.
11607 Returns 1 if ptid is found and thread_local_base is non zero. */
11610 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11612 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11614 struct remote_state
*rs
= get_remote_state ();
11615 char *p
= rs
->buf
.data ();
11616 char *endp
= p
+ get_remote_packet_size ();
11617 enum packet_result result
;
11619 strcpy (p
, "qGetTIBAddr:");
11621 p
= write_ptid (p
, endp
, ptid
);
11625 getpkt (&rs
->buf
, 0);
11626 result
= packet_ok (rs
->buf
,
11627 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11628 if (result
== PACKET_OK
)
11631 unpack_varlen_hex (rs
->buf
.data (), &val
);
11633 *addr
= (CORE_ADDR
) val
;
11636 else if (result
== PACKET_UNKNOWN
)
11637 error (_("Remote target doesn't support qGetTIBAddr packet"));
11639 error (_("Remote target failed to process qGetTIBAddr request"));
11642 error (_("qGetTIBAddr not supported or disabled on this target"));
11647 /* Support for inferring a target description based on the current
11648 architecture and the size of a 'g' packet. While the 'g' packet
11649 can have any size (since optional registers can be left off the
11650 end), some sizes are easily recognizable given knowledge of the
11651 approximate architecture. */
11653 struct remote_g_packet_guess
11655 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11662 const struct target_desc
*tdesc
;
11665 struct remote_g_packet_data
: public allocate_on_obstack
11667 std::vector
<remote_g_packet_guess
> guesses
;
11670 static struct gdbarch_data
*remote_g_packet_data_handle
;
11673 remote_g_packet_data_init (struct obstack
*obstack
)
11675 return new (obstack
) remote_g_packet_data
;
11679 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11680 const struct target_desc
*tdesc
)
11682 struct remote_g_packet_data
*data
11683 = ((struct remote_g_packet_data
*)
11684 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11686 gdb_assert (tdesc
!= NULL
);
11688 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11689 if (guess
.bytes
== bytes
)
11690 internal_error (__FILE__
, __LINE__
,
11691 _("Duplicate g packet description added for size %d"),
11694 data
->guesses
.emplace_back (bytes
, tdesc
);
11697 /* Return true if remote_read_description would do anything on this target
11698 and architecture, false otherwise. */
11701 remote_read_description_p (struct target_ops
*target
)
11703 struct remote_g_packet_data
*data
11704 = ((struct remote_g_packet_data
*)
11705 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11707 return !data
->guesses
.empty ();
11710 const struct target_desc
*
11711 remote_target::read_description ()
11713 struct remote_g_packet_data
*data
11714 = ((struct remote_g_packet_data
*)
11715 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11717 /* Do not try this during initial connection, when we do not know
11718 whether there is a running but stopped thread. */
11719 if (!target_has_execution
|| inferior_ptid
== null_ptid
)
11720 return beneath ()->read_description ();
11722 if (!data
->guesses
.empty ())
11724 int bytes
= send_g_packet ();
11726 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11727 if (guess
.bytes
== bytes
)
11728 return guess
.tdesc
;
11730 /* We discard the g packet. A minor optimization would be to
11731 hold on to it, and fill the register cache once we have selected
11732 an architecture, but it's too tricky to do safely. */
11735 return beneath ()->read_description ();
11738 /* Remote file transfer support. This is host-initiated I/O, not
11739 target-initiated; for target-initiated, see remote-fileio.c. */
11741 /* If *LEFT is at least the length of STRING, copy STRING to
11742 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11743 decrease *LEFT. Otherwise raise an error. */
11746 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11748 int len
= strlen (string
);
11751 error (_("Packet too long for target."));
11753 memcpy (*buffer
, string
, len
);
11757 /* NUL-terminate the buffer as a convenience, if there is
11763 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11764 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11765 decrease *LEFT. Otherwise raise an error. */
11768 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11771 if (2 * len
> *left
)
11772 error (_("Packet too long for target."));
11774 bin2hex (bytes
, *buffer
, len
);
11775 *buffer
+= 2 * len
;
11778 /* NUL-terminate the buffer as a convenience, if there is
11784 /* If *LEFT is large enough, convert VALUE to hex and add it to
11785 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11786 decrease *LEFT. Otherwise raise an error. */
11789 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11791 int len
= hexnumlen (value
);
11794 error (_("Packet too long for target."));
11796 hexnumstr (*buffer
, value
);
11800 /* NUL-terminate the buffer as a convenience, if there is
11806 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11807 value, *REMOTE_ERRNO to the remote error number or zero if none
11808 was included, and *ATTACHMENT to point to the start of the annex
11809 if any. The length of the packet isn't needed here; there may
11810 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11812 Return 0 if the packet could be parsed, -1 if it could not. If
11813 -1 is returned, the other variables may not be initialized. */
11816 remote_hostio_parse_result (char *buffer
, int *retcode
,
11817 int *remote_errno
, char **attachment
)
11822 *attachment
= NULL
;
11824 if (buffer
[0] != 'F')
11828 *retcode
= strtol (&buffer
[1], &p
, 16);
11829 if (errno
!= 0 || p
== &buffer
[1])
11832 /* Check for ",errno". */
11836 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11837 if (errno
!= 0 || p
+ 1 == p2
)
11842 /* Check for ";attachment". If there is no attachment, the
11843 packet should end here. */
11846 *attachment
= p
+ 1;
11849 else if (*p
== '\0')
11855 /* Send a prepared I/O packet to the target and read its response.
11856 The prepared packet is in the global RS->BUF before this function
11857 is called, and the answer is there when we return.
11859 COMMAND_BYTES is the length of the request to send, which may include
11860 binary data. WHICH_PACKET is the packet configuration to check
11861 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11862 is set to the error number and -1 is returned. Otherwise the value
11863 returned by the function is returned.
11865 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11866 attachment is expected; an error will be reported if there's a
11867 mismatch. If one is found, *ATTACHMENT will be set to point into
11868 the packet buffer and *ATTACHMENT_LEN will be set to the
11869 attachment's length. */
11872 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
11873 int *remote_errno
, char **attachment
,
11874 int *attachment_len
)
11876 struct remote_state
*rs
= get_remote_state ();
11877 int ret
, bytes_read
;
11878 char *attachment_tmp
;
11880 if (packet_support (which_packet
) == PACKET_DISABLE
)
11882 *remote_errno
= FILEIO_ENOSYS
;
11886 putpkt_binary (rs
->buf
.data (), command_bytes
);
11887 bytes_read
= getpkt_sane (&rs
->buf
, 0);
11889 /* If it timed out, something is wrong. Don't try to parse the
11891 if (bytes_read
< 0)
11893 *remote_errno
= FILEIO_EINVAL
;
11897 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11900 *remote_errno
= FILEIO_EINVAL
;
11902 case PACKET_UNKNOWN
:
11903 *remote_errno
= FILEIO_ENOSYS
;
11909 if (remote_hostio_parse_result (rs
->buf
.data (), &ret
, remote_errno
,
11912 *remote_errno
= FILEIO_EINVAL
;
11916 /* Make sure we saw an attachment if and only if we expected one. */
11917 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11918 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11920 *remote_errno
= FILEIO_EINVAL
;
11924 /* If an attachment was found, it must point into the packet buffer;
11925 work out how many bytes there were. */
11926 if (attachment_tmp
!= NULL
)
11928 *attachment
= attachment_tmp
;
11929 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
.data ());
11935 /* See declaration.h. */
11938 readahead_cache::invalidate ()
11943 /* See declaration.h. */
11946 readahead_cache::invalidate_fd (int fd
)
11948 if (this->fd
== fd
)
11952 /* Set the filesystem remote_hostio functions that take FILENAME
11953 arguments will use. Return 0 on success, or -1 if an error
11954 occurs (and set *REMOTE_ERRNO). */
11957 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
11960 struct remote_state
*rs
= get_remote_state ();
11961 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11962 char *p
= rs
->buf
.data ();
11963 int left
= get_remote_packet_size () - 1;
11967 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11970 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11973 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11975 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11976 remote_buffer_add_string (&p
, &left
, arg
);
11978 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_setfs
,
11979 remote_errno
, NULL
, NULL
);
11981 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11985 rs
->fs_pid
= required_pid
;
11990 /* Implementation of to_fileio_open. */
11993 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
11994 int flags
, int mode
, int warn_if_slow
,
11997 struct remote_state
*rs
= get_remote_state ();
11998 char *p
= rs
->buf
.data ();
11999 int left
= get_remote_packet_size () - 1;
12003 static int warning_issued
= 0;
12005 printf_unfiltered (_("Reading %s from remote target...\n"),
12008 if (!warning_issued
)
12010 warning (_("File transfers from remote targets can be slow."
12011 " Use \"set sysroot\" to access files locally"
12013 warning_issued
= 1;
12017 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12020 remote_buffer_add_string (&p
, &left
, "vFile:open:");
12022 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12023 strlen (filename
));
12024 remote_buffer_add_string (&p
, &left
, ",");
12026 remote_buffer_add_int (&p
, &left
, flags
);
12027 remote_buffer_add_string (&p
, &left
, ",");
12029 remote_buffer_add_int (&p
, &left
, mode
);
12031 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_open
,
12032 remote_errno
, NULL
, NULL
);
12036 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
12037 int flags
, int mode
, int warn_if_slow
,
12040 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
12044 /* Implementation of to_fileio_pwrite. */
12047 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12048 ULONGEST offset
, int *remote_errno
)
12050 struct remote_state
*rs
= get_remote_state ();
12051 char *p
= rs
->buf
.data ();
12052 int left
= get_remote_packet_size ();
12055 rs
->readahead_cache
.invalidate_fd (fd
);
12057 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
12059 remote_buffer_add_int (&p
, &left
, fd
);
12060 remote_buffer_add_string (&p
, &left
, ",");
12062 remote_buffer_add_int (&p
, &left
, offset
);
12063 remote_buffer_add_string (&p
, &left
, ",");
12065 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
12066 (get_remote_packet_size ()
12067 - (p
- rs
->buf
.data ())));
12069 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pwrite
,
12070 remote_errno
, NULL
, NULL
);
12074 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12075 ULONGEST offset
, int *remote_errno
)
12077 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12080 /* Helper for the implementation of to_fileio_pread. Read the file
12081 from the remote side with vFile:pread. */
12084 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12085 ULONGEST offset
, int *remote_errno
)
12087 struct remote_state
*rs
= get_remote_state ();
12088 char *p
= rs
->buf
.data ();
12090 int left
= get_remote_packet_size ();
12091 int ret
, attachment_len
;
12094 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12096 remote_buffer_add_int (&p
, &left
, fd
);
12097 remote_buffer_add_string (&p
, &left
, ",");
12099 remote_buffer_add_int (&p
, &left
, len
);
12100 remote_buffer_add_string (&p
, &left
, ",");
12102 remote_buffer_add_int (&p
, &left
, offset
);
12104 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_pread
,
12105 remote_errno
, &attachment
,
12111 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12113 if (read_len
!= ret
)
12114 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12119 /* See declaration.h. */
12122 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12126 && this->offset
<= offset
12127 && offset
< this->offset
+ this->bufsize
)
12129 ULONGEST max
= this->offset
+ this->bufsize
;
12131 if (offset
+ len
> max
)
12132 len
= max
- offset
;
12134 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12141 /* Implementation of to_fileio_pread. */
12144 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12145 ULONGEST offset
, int *remote_errno
)
12148 struct remote_state
*rs
= get_remote_state ();
12149 readahead_cache
*cache
= &rs
->readahead_cache
;
12151 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12154 cache
->hit_count
++;
12157 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
12158 pulongest (cache
->hit_count
));
12162 cache
->miss_count
++;
12164 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
12165 pulongest (cache
->miss_count
));
12168 cache
->offset
= offset
;
12169 cache
->bufsize
= get_remote_packet_size ();
12170 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12172 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12173 cache
->offset
, remote_errno
);
12176 cache
->invalidate_fd (fd
);
12180 cache
->bufsize
= ret
;
12181 return cache
->pread (fd
, read_buf
, len
, offset
);
12185 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12186 ULONGEST offset
, int *remote_errno
)
12188 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12191 /* Implementation of to_fileio_close. */
12194 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12196 struct remote_state
*rs
= get_remote_state ();
12197 char *p
= rs
->buf
.data ();
12198 int left
= get_remote_packet_size () - 1;
12200 rs
->readahead_cache
.invalidate_fd (fd
);
12202 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12204 remote_buffer_add_int (&p
, &left
, fd
);
12206 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_close
,
12207 remote_errno
, NULL
, NULL
);
12211 remote_target::fileio_close (int fd
, int *remote_errno
)
12213 return remote_hostio_close (fd
, remote_errno
);
12216 /* Implementation of to_fileio_unlink. */
12219 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12222 struct remote_state
*rs
= get_remote_state ();
12223 char *p
= rs
->buf
.data ();
12224 int left
= get_remote_packet_size () - 1;
12226 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12229 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12231 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12232 strlen (filename
));
12234 return remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_unlink
,
12235 remote_errno
, NULL
, NULL
);
12239 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12242 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12245 /* Implementation of to_fileio_readlink. */
12247 gdb::optional
<std::string
>
12248 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12251 struct remote_state
*rs
= get_remote_state ();
12252 char *p
= rs
->buf
.data ();
12254 int left
= get_remote_packet_size ();
12255 int len
, attachment_len
;
12258 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12261 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12263 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12264 strlen (filename
));
12266 len
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_readlink
,
12267 remote_errno
, &attachment
,
12273 std::string
ret (len
, '\0');
12275 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12276 (gdb_byte
*) &ret
[0], len
);
12277 if (read_len
!= len
)
12278 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12283 /* Implementation of to_fileio_fstat. */
12286 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12288 struct remote_state
*rs
= get_remote_state ();
12289 char *p
= rs
->buf
.data ();
12290 int left
= get_remote_packet_size ();
12291 int attachment_len
, ret
;
12293 struct fio_stat fst
;
12296 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12298 remote_buffer_add_int (&p
, &left
, fd
);
12300 ret
= remote_hostio_send_command (p
- rs
->buf
.data (), PACKET_vFile_fstat
,
12301 remote_errno
, &attachment
,
12305 if (*remote_errno
!= FILEIO_ENOSYS
)
12308 /* Strictly we should return -1, ENOSYS here, but when
12309 "set sysroot remote:" was implemented in August 2008
12310 BFD's need for a stat function was sidestepped with
12311 this hack. This was not remedied until March 2015
12312 so we retain the previous behavior to avoid breaking
12315 Note that the memset is a March 2015 addition; older
12316 GDBs set st_size *and nothing else* so the structure
12317 would have garbage in all other fields. This might
12318 break something but retaining the previous behavior
12319 here would be just too wrong. */
12321 memset (st
, 0, sizeof (struct stat
));
12322 st
->st_size
= INT_MAX
;
12326 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12327 (gdb_byte
*) &fst
, sizeof (fst
));
12329 if (read_len
!= ret
)
12330 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12332 if (read_len
!= sizeof (fst
))
12333 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12334 read_len
, (int) sizeof (fst
));
12336 remote_fileio_to_host_stat (&fst
, st
);
12341 /* Implementation of to_filesystem_is_local. */
12344 remote_target::filesystem_is_local ()
12346 /* Valgrind GDB presents itself as a remote target but works
12347 on the local filesystem: it does not implement remote get
12348 and users are not expected to set a sysroot. To handle
12349 this case we treat the remote filesystem as local if the
12350 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12351 does not support vFile:open. */
12352 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12354 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12356 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12358 int fd
, remote_errno
;
12360 /* Try opening a file to probe support. The supplied
12361 filename is irrelevant, we only care about whether
12362 the stub recognizes the packet or not. */
12363 fd
= remote_hostio_open (NULL
, "just probing",
12364 FILEIO_O_RDONLY
, 0700, 0,
12368 remote_hostio_close (fd
, &remote_errno
);
12370 ps
= packet_support (PACKET_vFile_open
);
12373 if (ps
== PACKET_DISABLE
)
12375 static int warning_issued
= 0;
12377 if (!warning_issued
)
12379 warning (_("remote target does not support file"
12380 " transfer, attempting to access files"
12381 " from local filesystem."));
12382 warning_issued
= 1;
12393 remote_fileio_errno_to_host (int errnum
)
12399 case FILEIO_ENOENT
:
12407 case FILEIO_EACCES
:
12409 case FILEIO_EFAULT
:
12413 case FILEIO_EEXIST
:
12415 case FILEIO_ENODEV
:
12417 case FILEIO_ENOTDIR
:
12419 case FILEIO_EISDIR
:
12421 case FILEIO_EINVAL
:
12423 case FILEIO_ENFILE
:
12425 case FILEIO_EMFILE
:
12429 case FILEIO_ENOSPC
:
12431 case FILEIO_ESPIPE
:
12435 case FILEIO_ENOSYS
:
12437 case FILEIO_ENAMETOOLONG
:
12438 return ENAMETOOLONG
;
12444 remote_hostio_error (int errnum
)
12446 int host_error
= remote_fileio_errno_to_host (errnum
);
12448 if (host_error
== -1)
12449 error (_("Unknown remote I/O error %d"), errnum
);
12451 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12454 /* A RAII wrapper around a remote file descriptor. */
12456 class scoped_remote_fd
12459 scoped_remote_fd (remote_target
*remote
, int fd
)
12460 : m_remote (remote
), m_fd (fd
)
12464 ~scoped_remote_fd ()
12471 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12475 /* Swallow exception before it escapes the dtor. If
12476 something goes wrong, likely the connection is gone,
12477 and there's nothing else that can be done. */
12482 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12484 /* Release ownership of the file descriptor, and return it. */
12485 ATTRIBUTE_UNUSED_RESULT
int release () noexcept
12492 /* Return the owned file descriptor. */
12493 int get () const noexcept
12499 /* The remote target. */
12500 remote_target
*m_remote
;
12502 /* The owned remote I/O file descriptor. */
12507 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12509 remote_target
*remote
= get_current_remote_target ();
12511 if (remote
== nullptr)
12512 error (_("command can only be used with remote target"));
12514 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12518 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12521 int retcode
, remote_errno
, bytes
, io_size
;
12522 int bytes_in_buffer
;
12526 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12528 perror_with_name (local_file
);
12530 scoped_remote_fd fd
12531 (this, remote_hostio_open (NULL
,
12532 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12534 0700, 0, &remote_errno
));
12535 if (fd
.get () == -1)
12536 remote_hostio_error (remote_errno
);
12538 /* Send up to this many bytes at once. They won't all fit in the
12539 remote packet limit, so we'll transfer slightly fewer. */
12540 io_size
= get_remote_packet_size ();
12541 gdb::byte_vector
buffer (io_size
);
12543 bytes_in_buffer
= 0;
12546 while (bytes_in_buffer
|| !saw_eof
)
12550 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12551 io_size
- bytes_in_buffer
,
12555 if (ferror (file
.get ()))
12556 error (_("Error reading %s."), local_file
);
12559 /* EOF. Unless there is something still in the
12560 buffer from the last iteration, we are done. */
12562 if (bytes_in_buffer
== 0)
12570 bytes
+= bytes_in_buffer
;
12571 bytes_in_buffer
= 0;
12573 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12574 offset
, &remote_errno
);
12577 remote_hostio_error (remote_errno
);
12578 else if (retcode
== 0)
12579 error (_("Remote write of %d bytes returned 0!"), bytes
);
12580 else if (retcode
< bytes
)
12582 /* Short write. Save the rest of the read data for the next
12584 bytes_in_buffer
= bytes
- retcode
;
12585 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12591 if (remote_hostio_close (fd
.release (), &remote_errno
))
12592 remote_hostio_error (remote_errno
);
12595 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12599 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12601 remote_target
*remote
= get_current_remote_target ();
12603 if (remote
== nullptr)
12604 error (_("command can only be used with remote target"));
12606 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12610 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12613 int remote_errno
, bytes
, io_size
;
12616 scoped_remote_fd fd
12617 (this, remote_hostio_open (NULL
,
12618 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12620 if (fd
.get () == -1)
12621 remote_hostio_error (remote_errno
);
12623 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12625 perror_with_name (local_file
);
12627 /* Send up to this many bytes at once. They won't all fit in the
12628 remote packet limit, so we'll transfer slightly fewer. */
12629 io_size
= get_remote_packet_size ();
12630 gdb::byte_vector
buffer (io_size
);
12635 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12638 /* Success, but no bytes, means end-of-file. */
12641 remote_hostio_error (remote_errno
);
12645 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12647 perror_with_name (local_file
);
12650 if (remote_hostio_close (fd
.release (), &remote_errno
))
12651 remote_hostio_error (remote_errno
);
12654 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12658 remote_file_delete (const char *remote_file
, int from_tty
)
12660 remote_target
*remote
= get_current_remote_target ();
12662 if (remote
== nullptr)
12663 error (_("command can only be used with remote target"));
12665 remote
->remote_file_delete (remote_file
, from_tty
);
12669 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12671 int retcode
, remote_errno
;
12673 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12675 remote_hostio_error (remote_errno
);
12678 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12682 remote_put_command (const char *args
, int from_tty
)
12685 error_no_arg (_("file to put"));
12687 gdb_argv
argv (args
);
12688 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12689 error (_("Invalid parameters to remote put"));
12691 remote_file_put (argv
[0], argv
[1], from_tty
);
12695 remote_get_command (const char *args
, int from_tty
)
12698 error_no_arg (_("file to get"));
12700 gdb_argv
argv (args
);
12701 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12702 error (_("Invalid parameters to remote get"));
12704 remote_file_get (argv
[0], argv
[1], from_tty
);
12708 remote_delete_command (const char *args
, int from_tty
)
12711 error_no_arg (_("file to delete"));
12713 gdb_argv
argv (args
);
12714 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12715 error (_("Invalid parameters to remote delete"));
12717 remote_file_delete (argv
[0], from_tty
);
12721 remote_target::can_execute_reverse ()
12723 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12724 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12731 remote_target::supports_non_stop ()
12737 remote_target::supports_disable_randomization ()
12739 /* Only supported in extended mode. */
12744 remote_target::supports_multi_process ()
12746 struct remote_state
*rs
= get_remote_state ();
12748 return remote_multi_process_p (rs
);
12752 remote_supports_cond_tracepoints ()
12754 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12758 remote_target::supports_evaluation_of_breakpoint_conditions ()
12760 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12764 remote_supports_fast_tracepoints ()
12766 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12770 remote_supports_static_tracepoints ()
12772 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12776 remote_supports_install_in_trace ()
12778 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12782 remote_target::supports_enable_disable_tracepoint ()
12784 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12789 remote_target::supports_string_tracing ()
12791 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12795 remote_target::can_run_breakpoint_commands ()
12797 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12801 remote_target::trace_init ()
12803 struct remote_state
*rs
= get_remote_state ();
12806 remote_get_noisy_reply ();
12807 if (strcmp (rs
->buf
.data (), "OK") != 0)
12808 error (_("Target does not support this command."));
12811 /* Recursive routine to walk through command list including loops, and
12812 download packets for each command. */
12815 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
12816 struct command_line
*cmds
)
12818 struct remote_state
*rs
= get_remote_state ();
12819 struct command_line
*cmd
;
12821 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12823 QUIT
; /* Allow user to bail out with ^C. */
12824 strcpy (rs
->buf
.data (), "QTDPsrc:");
12825 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12826 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12827 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12829 remote_get_noisy_reply ();
12830 if (strcmp (rs
->buf
.data (), "OK"))
12831 warning (_("Target does not support source download."));
12833 if (cmd
->control_type
== while_control
12834 || cmd
->control_type
== while_stepping_control
)
12836 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
12838 QUIT
; /* Allow user to bail out with ^C. */
12839 strcpy (rs
->buf
.data (), "QTDPsrc:");
12840 encode_source_string (num
, addr
, "cmd", "end",
12841 rs
->buf
.data () + strlen (rs
->buf
.data ()),
12842 rs
->buf
.size () - strlen (rs
->buf
.data ()));
12844 remote_get_noisy_reply ();
12845 if (strcmp (rs
->buf
.data (), "OK"))
12846 warning (_("Target does not support source download."));
12852 remote_target::download_tracepoint (struct bp_location
*loc
)
12856 std::vector
<std::string
> tdp_actions
;
12857 std::vector
<std::string
> stepping_actions
;
12859 struct breakpoint
*b
= loc
->owner
;
12860 struct tracepoint
*t
= (struct tracepoint
*) b
;
12861 struct remote_state
*rs
= get_remote_state ();
12863 const char *err_msg
= _("Tracepoint packet too large for target.");
12866 /* We use a buffer other than rs->buf because we'll build strings
12867 across multiple statements, and other statements in between could
12869 gdb::char_vector
buf (get_remote_packet_size ());
12871 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12873 tpaddr
= loc
->address
;
12874 strcpy (addrbuf
, phex (tpaddr
, sizeof (CORE_ADDR
)));
12875 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
12876 b
->number
, addrbuf
, /* address */
12877 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12878 t
->step_count
, t
->pass_count
);
12880 if (ret
< 0 || ret
>= buf
.size ())
12881 error ("%s", err_msg
);
12883 /* Fast tracepoints are mostly handled by the target, but we can
12884 tell the target how big of an instruction block should be moved
12886 if (b
->type
== bp_fast_tracepoint
)
12888 /* Only test for support at download time; we may not know
12889 target capabilities at definition time. */
12890 if (remote_supports_fast_tracepoints ())
12892 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12895 size_left
= buf
.size () - strlen (buf
.data ());
12896 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12898 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12900 if (ret
< 0 || ret
>= size_left
)
12901 error ("%s", err_msg
);
12904 /* If it passed validation at definition but fails now,
12905 something is very wrong. */
12906 internal_error (__FILE__
, __LINE__
,
12907 _("Fast tracepoint not "
12908 "valid during download"));
12911 /* Fast tracepoints are functionally identical to regular
12912 tracepoints, so don't take lack of support as a reason to
12913 give up on the trace run. */
12914 warning (_("Target does not support fast tracepoints, "
12915 "downloading %d as regular tracepoint"), b
->number
);
12917 else if (b
->type
== bp_static_tracepoint
)
12919 /* Only test for support at download time; we may not know
12920 target capabilities at definition time. */
12921 if (remote_supports_static_tracepoints ())
12923 struct static_tracepoint_marker marker
;
12925 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12927 size_left
= buf
.size () - strlen (buf
.data ());
12928 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12931 if (ret
< 0 || ret
>= size_left
)
12932 error ("%s", err_msg
);
12935 error (_("Static tracepoint not valid during download"));
12938 /* Fast tracepoints are functionally identical to regular
12939 tracepoints, so don't take lack of support as a reason
12940 to give up on the trace run. */
12941 error (_("Target does not support static tracepoints"));
12943 /* If the tracepoint has a conditional, make it into an agent
12944 expression and append to the definition. */
12947 /* Only test support at download time, we may not know target
12948 capabilities at definition time. */
12949 if (remote_supports_cond_tracepoints ())
12951 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
12954 size_left
= buf
.size () - strlen (buf
.data ());
12956 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12957 size_left
, ":X%x,", aexpr
->len
);
12959 if (ret
< 0 || ret
>= size_left
)
12960 error ("%s", err_msg
);
12962 size_left
= buf
.size () - strlen (buf
.data ());
12964 /* Two bytes to encode each aexpr byte, plus the terminating
12966 if (aexpr
->len
* 2 + 1 > size_left
)
12967 error ("%s", err_msg
);
12969 pkt
= buf
.data () + strlen (buf
.data ());
12971 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12972 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12976 warning (_("Target does not support conditional tracepoints, "
12977 "ignoring tp %d cond"), b
->number
);
12980 if (b
->commands
|| *default_collect
)
12982 size_left
= buf
.size () - strlen (buf
.data ());
12984 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12987 if (ret
< 0 || ret
>= size_left
)
12988 error ("%s", err_msg
);
12991 putpkt (buf
.data ());
12992 remote_get_noisy_reply ();
12993 if (strcmp (rs
->buf
.data (), "OK"))
12994 error (_("Target does not support tracepoints."));
12996 /* do_single_steps (t); */
12997 for (auto action_it
= tdp_actions
.begin ();
12998 action_it
!= tdp_actions
.end (); action_it
++)
13000 QUIT
; /* Allow user to bail out with ^C. */
13002 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
13003 || !stepping_actions
.empty ());
13005 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
13006 b
->number
, addrbuf
, /* address */
13007 action_it
->c_str (),
13008 has_more
? '-' : 0);
13010 if (ret
< 0 || ret
>= buf
.size ())
13011 error ("%s", err_msg
);
13013 putpkt (buf
.data ());
13014 remote_get_noisy_reply ();
13015 if (strcmp (rs
->buf
.data (), "OK"))
13016 error (_("Error on target while setting tracepoints."));
13019 for (auto action_it
= stepping_actions
.begin ();
13020 action_it
!= stepping_actions
.end (); action_it
++)
13022 QUIT
; /* Allow user to bail out with ^C. */
13024 bool is_first
= action_it
== stepping_actions
.begin ();
13025 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
13027 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
13028 b
->number
, addrbuf
, /* address */
13029 is_first
? "S" : "",
13030 action_it
->c_str (),
13031 has_more
? "-" : "");
13033 if (ret
< 0 || ret
>= buf
.size ())
13034 error ("%s", err_msg
);
13036 putpkt (buf
.data ());
13037 remote_get_noisy_reply ();
13038 if (strcmp (rs
->buf
.data (), "OK"))
13039 error (_("Error on target while setting tracepoints."));
13042 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
13044 if (b
->location
!= NULL
)
13046 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13048 if (ret
< 0 || ret
>= buf
.size ())
13049 error ("%s", err_msg
);
13051 encode_source_string (b
->number
, loc
->address
, "at",
13052 event_location_to_string (b
->location
.get ()),
13053 buf
.data () + strlen (buf
.data ()),
13054 buf
.size () - strlen (buf
.data ()));
13055 putpkt (buf
.data ());
13056 remote_get_noisy_reply ();
13057 if (strcmp (rs
->buf
.data (), "OK"))
13058 warning (_("Target does not support source download."));
13060 if (b
->cond_string
)
13062 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
13064 if (ret
< 0 || ret
>= buf
.size ())
13065 error ("%s", err_msg
);
13067 encode_source_string (b
->number
, loc
->address
,
13068 "cond", b
->cond_string
,
13069 buf
.data () + strlen (buf
.data ()),
13070 buf
.size () - strlen (buf
.data ()));
13071 putpkt (buf
.data ());
13072 remote_get_noisy_reply ();
13073 if (strcmp (rs
->buf
.data (), "OK"))
13074 warning (_("Target does not support source download."));
13076 remote_download_command_source (b
->number
, loc
->address
,
13077 breakpoint_commands (b
));
13082 remote_target::can_download_tracepoint ()
13084 struct remote_state
*rs
= get_remote_state ();
13085 struct trace_status
*ts
;
13088 /* Don't try to install tracepoints until we've relocated our
13089 symbols, and fetched and merged the target's tracepoint list with
13091 if (rs
->starting_up
)
13094 ts
= current_trace_status ();
13095 status
= get_trace_status (ts
);
13097 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13100 /* If we are in a tracing experiment, but remote stub doesn't support
13101 installing tracepoint in trace, we have to return. */
13102 if (!remote_supports_install_in_trace ())
13110 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13112 struct remote_state
*rs
= get_remote_state ();
13115 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDV:%x:%s:%x:",
13116 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13118 p
= rs
->buf
.data () + strlen (rs
->buf
.data ());
13119 if ((p
- rs
->buf
.data ()) + tsv
.name
.length () * 2
13120 >= get_remote_packet_size ())
13121 error (_("Trace state variable name too long for tsv definition packet"));
13122 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13125 remote_get_noisy_reply ();
13126 if (rs
->buf
[0] == '\0')
13127 error (_("Target does not support this command."));
13128 if (strcmp (rs
->buf
.data (), "OK") != 0)
13129 error (_("Error on target while downloading trace state variable."));
13133 remote_target::enable_tracepoint (struct bp_location
*location
)
13135 struct remote_state
*rs
= get_remote_state ();
13137 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTEnable:%x:%s",
13138 location
->owner
->number
,
13139 phex (location
->address
, sizeof (CORE_ADDR
)));
13141 remote_get_noisy_reply ();
13142 if (rs
->buf
[0] == '\0')
13143 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13144 if (strcmp (rs
->buf
.data (), "OK") != 0)
13145 error (_("Error on target while enabling tracepoint."));
13149 remote_target::disable_tracepoint (struct bp_location
*location
)
13151 struct remote_state
*rs
= get_remote_state ();
13153 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QTDisable:%x:%s",
13154 location
->owner
->number
,
13155 phex (location
->address
, sizeof (CORE_ADDR
)));
13157 remote_get_noisy_reply ();
13158 if (rs
->buf
[0] == '\0')
13159 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13160 if (strcmp (rs
->buf
.data (), "OK") != 0)
13161 error (_("Error on target while disabling tracepoint."));
13165 remote_target::trace_set_readonly_regions ()
13168 bfd_size_type size
;
13174 return; /* No information to give. */
13176 struct remote_state
*rs
= get_remote_state ();
13178 strcpy (rs
->buf
.data (), "QTro");
13179 offset
= strlen (rs
->buf
.data ());
13180 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
13182 char tmp1
[40], tmp2
[40];
13185 if ((s
->flags
& SEC_LOAD
) == 0 ||
13186 /* (s->flags & SEC_CODE) == 0 || */
13187 (s
->flags
& SEC_READONLY
) == 0)
13191 vma
= bfd_section_vma (s
);
13192 size
= bfd_section_size (s
);
13193 sprintf_vma (tmp1
, vma
);
13194 sprintf_vma (tmp2
, vma
+ size
);
13195 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13196 if (offset
+ sec_length
+ 1 > rs
->buf
.size ())
13198 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13200 Too many sections for read-only sections definition packet."));
13203 xsnprintf (rs
->buf
.data () + offset
, rs
->buf
.size () - offset
, ":%s,%s",
13205 offset
+= sec_length
;
13210 getpkt (&rs
->buf
, 0);
13215 remote_target::trace_start ()
13217 struct remote_state
*rs
= get_remote_state ();
13219 putpkt ("QTStart");
13220 remote_get_noisy_reply ();
13221 if (rs
->buf
[0] == '\0')
13222 error (_("Target does not support this command."));
13223 if (strcmp (rs
->buf
.data (), "OK") != 0)
13224 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13228 remote_target::get_trace_status (struct trace_status
*ts
)
13230 /* Initialize it just to avoid a GCC false warning. */
13232 enum packet_result result
;
13233 struct remote_state
*rs
= get_remote_state ();
13235 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13238 /* FIXME we need to get register block size some other way. */
13239 trace_regblock_size
13240 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13242 putpkt ("qTStatus");
13246 p
= remote_get_noisy_reply ();
13248 catch (const gdb_exception_error
&ex
)
13250 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13252 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13258 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13260 /* If the remote target doesn't do tracing, flag it. */
13261 if (result
== PACKET_UNKNOWN
)
13264 /* We're working with a live target. */
13265 ts
->filename
= NULL
;
13268 error (_("Bogus trace status reply from target: %s"), rs
->buf
.data ());
13270 /* Function 'parse_trace_status' sets default value of each field of
13271 'ts' at first, so we don't have to do it here. */
13272 parse_trace_status (p
, ts
);
13274 return ts
->running
;
13278 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13279 struct uploaded_tp
*utp
)
13281 struct remote_state
*rs
= get_remote_state ();
13283 struct bp_location
*loc
;
13284 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13285 size_t size
= get_remote_packet_size ();
13290 tp
->traceframe_usage
= 0;
13291 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
13293 /* If the tracepoint was never downloaded, don't go asking for
13295 if (tp
->number_on_target
== 0)
13297 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", tp
->number_on_target
,
13298 phex_nz (loc
->address
, 0));
13300 reply
= remote_get_noisy_reply ();
13301 if (reply
&& *reply
)
13304 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13310 utp
->hit_count
= 0;
13311 utp
->traceframe_usage
= 0;
13312 xsnprintf (rs
->buf
.data (), size
, "qTP:%x:%s", utp
->number
,
13313 phex_nz (utp
->addr
, 0));
13315 reply
= remote_get_noisy_reply ();
13316 if (reply
&& *reply
)
13319 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13325 remote_target::trace_stop ()
13327 struct remote_state
*rs
= get_remote_state ();
13330 remote_get_noisy_reply ();
13331 if (rs
->buf
[0] == '\0')
13332 error (_("Target does not support this command."));
13333 if (strcmp (rs
->buf
.data (), "OK") != 0)
13334 error (_("Bogus reply from target: %s"), rs
->buf
.data ());
13338 remote_target::trace_find (enum trace_find_type type
, int num
,
13339 CORE_ADDR addr1
, CORE_ADDR addr2
,
13342 struct remote_state
*rs
= get_remote_state ();
13343 char *endbuf
= rs
->buf
.data () + get_remote_packet_size ();
13345 int target_frameno
= -1, target_tracept
= -1;
13347 /* Lookups other than by absolute frame number depend on the current
13348 trace selected, so make sure it is correct on the remote end
13350 if (type
!= tfind_number
)
13351 set_remote_traceframe ();
13353 p
= rs
->buf
.data ();
13354 strcpy (p
, "QTFrame:");
13355 p
= strchr (p
, '\0');
13359 xsnprintf (p
, endbuf
- p
, "%x", num
);
13362 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13365 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13368 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13369 phex_nz (addr2
, 0));
13371 case tfind_outside
:
13372 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13373 phex_nz (addr2
, 0));
13376 error (_("Unknown trace find type %d"), type
);
13380 reply
= remote_get_noisy_reply ();
13381 if (*reply
== '\0')
13382 error (_("Target does not support this command."));
13384 while (reply
&& *reply
)
13389 target_frameno
= (int) strtol (p
, &reply
, 16);
13391 error (_("Unable to parse trace frame number"));
13392 /* Don't update our remote traceframe number cache on failure
13393 to select a remote traceframe. */
13394 if (target_frameno
== -1)
13399 target_tracept
= (int) strtol (p
, &reply
, 16);
13401 error (_("Unable to parse tracepoint number"));
13403 case 'O': /* "OK"? */
13404 if (reply
[1] == 'K' && reply
[2] == '\0')
13407 error (_("Bogus reply from target: %s"), reply
);
13410 error (_("Bogus reply from target: %s"), reply
);
13413 *tpp
= target_tracept
;
13415 rs
->remote_traceframe_number
= target_frameno
;
13416 return target_frameno
;
13420 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13422 struct remote_state
*rs
= get_remote_state ();
13426 set_remote_traceframe ();
13428 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTV:%x", tsvnum
);
13430 reply
= remote_get_noisy_reply ();
13431 if (reply
&& *reply
)
13435 unpack_varlen_hex (reply
+ 1, &uval
);
13436 *val
= (LONGEST
) uval
;
13444 remote_target::save_trace_data (const char *filename
)
13446 struct remote_state
*rs
= get_remote_state ();
13449 p
= rs
->buf
.data ();
13450 strcpy (p
, "QTSave:");
13452 if ((p
- rs
->buf
.data ()) + strlen (filename
) * 2
13453 >= get_remote_packet_size ())
13454 error (_("Remote file name too long for trace save packet"));
13455 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13458 reply
= remote_get_noisy_reply ();
13459 if (*reply
== '\0')
13460 error (_("Target does not support this command."));
13461 if (strcmp (reply
, "OK") != 0)
13462 error (_("Bogus reply from target: %s"), reply
);
13466 /* This is basically a memory transfer, but needs to be its own packet
13467 because we don't know how the target actually organizes its trace
13468 memory, plus we want to be able to ask for as much as possible, but
13469 not be unhappy if we don't get as much as we ask for. */
13472 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13474 struct remote_state
*rs
= get_remote_state ();
13479 p
= rs
->buf
.data ();
13480 strcpy (p
, "qTBuffer:");
13482 p
+= hexnumstr (p
, offset
);
13484 p
+= hexnumstr (p
, len
);
13488 reply
= remote_get_noisy_reply ();
13489 if (reply
&& *reply
)
13491 /* 'l' by itself means we're at the end of the buffer and
13492 there is nothing more to get. */
13496 /* Convert the reply into binary. Limit the number of bytes to
13497 convert according to our passed-in buffer size, rather than
13498 what was returned in the packet; if the target is
13499 unexpectedly generous and gives us a bigger reply than we
13500 asked for, we don't want to crash. */
13501 rslt
= hex2bin (reply
, buf
, len
);
13505 /* Something went wrong, flag as an error. */
13510 remote_target::set_disconnected_tracing (int val
)
13512 struct remote_state
*rs
= get_remote_state ();
13514 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13518 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13519 "QTDisconnected:%x", val
);
13521 reply
= remote_get_noisy_reply ();
13522 if (*reply
== '\0')
13523 error (_("Target does not support this command."));
13524 if (strcmp (reply
, "OK") != 0)
13525 error (_("Bogus reply from target: %s"), reply
);
13528 warning (_("Target does not support disconnected tracing."));
13532 remote_target::core_of_thread (ptid_t ptid
)
13534 thread_info
*info
= find_thread_ptid (this, ptid
);
13536 if (info
!= NULL
&& info
->priv
!= NULL
)
13537 return get_remote_thread_info (info
)->core
;
13543 remote_target::set_circular_trace_buffer (int val
)
13545 struct remote_state
*rs
= get_remote_state ();
13548 xsnprintf (rs
->buf
.data (), get_remote_packet_size (),
13549 "QTBuffer:circular:%x", val
);
13551 reply
= remote_get_noisy_reply ();
13552 if (*reply
== '\0')
13553 error (_("Target does not support this command."));
13554 if (strcmp (reply
, "OK") != 0)
13555 error (_("Bogus reply from target: %s"), reply
);
13559 remote_target::traceframe_info ()
13561 gdb::optional
<gdb::char_vector
> text
13562 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO
,
13565 return parse_traceframe_info (text
->data ());
13570 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13571 instruction on which a fast tracepoint may be placed. Returns -1
13572 if the packet is not supported, and 0 if the minimum instruction
13573 length is unknown. */
13576 remote_target::get_min_fast_tracepoint_insn_len ()
13578 struct remote_state
*rs
= get_remote_state ();
13581 /* If we're not debugging a process yet, the IPA can't be
13583 if (!target_has_execution
)
13586 /* Make sure the remote is pointing at the right process. */
13587 set_general_process ();
13589 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "qTMinFTPILen");
13591 reply
= remote_get_noisy_reply ();
13592 if (*reply
== '\0')
13596 ULONGEST min_insn_len
;
13598 unpack_varlen_hex (reply
, &min_insn_len
);
13600 return (int) min_insn_len
;
13605 remote_target::set_trace_buffer_size (LONGEST val
)
13607 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13609 struct remote_state
*rs
= get_remote_state ();
13610 char *buf
= rs
->buf
.data ();
13611 char *endbuf
= buf
+ get_remote_packet_size ();
13612 enum packet_result result
;
13614 gdb_assert (val
>= 0 || val
== -1);
13615 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13616 /* Send -1 as literal "-1" to avoid host size dependency. */
13620 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13623 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13626 remote_get_noisy_reply ();
13627 result
= packet_ok (rs
->buf
,
13628 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13630 if (result
!= PACKET_OK
)
13631 warning (_("Bogus reply from target: %s"), rs
->buf
.data ());
13636 remote_target::set_trace_notes (const char *user
, const char *notes
,
13637 const char *stop_notes
)
13639 struct remote_state
*rs
= get_remote_state ();
13641 char *buf
= rs
->buf
.data ();
13642 char *endbuf
= buf
+ get_remote_packet_size ();
13645 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13648 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13649 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13655 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13656 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13662 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13663 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13667 /* Ensure the buffer is terminated. */
13671 reply
= remote_get_noisy_reply ();
13672 if (*reply
== '\0')
13675 if (strcmp (reply
, "OK") != 0)
13676 error (_("Bogus reply from target: %s"), reply
);
13682 remote_target::use_agent (bool use
)
13684 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13686 struct remote_state
*rs
= get_remote_state ();
13688 /* If the stub supports QAgent. */
13689 xsnprintf (rs
->buf
.data (), get_remote_packet_size (), "QAgent:%d", use
);
13691 getpkt (&rs
->buf
, 0);
13693 if (strcmp (rs
->buf
.data (), "OK") == 0)
13704 remote_target::can_use_agent ()
13706 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13709 struct btrace_target_info
13711 /* The ptid of the traced thread. */
13714 /* The obtained branch trace configuration. */
13715 struct btrace_config conf
;
13718 /* Reset our idea of our target's btrace configuration. */
13721 remote_btrace_reset (remote_state
*rs
)
13723 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13726 /* Synchronize the configuration with the target. */
13729 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13731 struct packet_config
*packet
;
13732 struct remote_state
*rs
;
13733 char *buf
, *pos
, *endbuf
;
13735 rs
= get_remote_state ();
13736 buf
= rs
->buf
.data ();
13737 endbuf
= buf
+ get_remote_packet_size ();
13739 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13740 if (packet_config_support (packet
) == PACKET_ENABLE
13741 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13744 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13748 getpkt (&rs
->buf
, 0);
13750 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13752 if (buf
[0] == 'E' && buf
[1] == '.')
13753 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13755 error (_("Failed to configure the BTS buffer size."));
13758 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13761 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13762 if (packet_config_support (packet
) == PACKET_ENABLE
13763 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13766 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13770 getpkt (&rs
->buf
, 0);
13772 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13774 if (buf
[0] == 'E' && buf
[1] == '.')
13775 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13777 error (_("Failed to configure the trace buffer size."));
13780 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13784 /* Read the current thread's btrace configuration from the target and
13785 store it into CONF. */
13788 btrace_read_config (struct btrace_config
*conf
)
13790 gdb::optional
<gdb::char_vector
> xml
13791 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF
, "");
13793 parse_xml_btrace_conf (conf
, xml
->data ());
13796 /* Maybe reopen target btrace. */
13799 remote_target::remote_btrace_maybe_reopen ()
13801 struct remote_state
*rs
= get_remote_state ();
13802 int btrace_target_pushed
= 0;
13803 #if !defined (HAVE_LIBIPT)
13807 /* Don't bother walking the entirety of the remote thread list when
13808 we know the feature isn't supported by the remote. */
13809 if (packet_support (PACKET_qXfer_btrace_conf
) != PACKET_ENABLE
)
13812 scoped_restore_current_thread restore_thread
;
13814 for (thread_info
*tp
: all_non_exited_threads (this))
13816 set_general_thread (tp
->ptid
);
13818 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13819 btrace_read_config (&rs
->btrace_config
);
13821 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13824 #if !defined (HAVE_LIBIPT)
13825 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13830 warning (_("Target is recording using Intel Processor Trace "
13831 "but support was disabled at compile time."));
13836 #endif /* !defined (HAVE_LIBIPT) */
13838 /* Push target, once, but before anything else happens. This way our
13839 changes to the threads will be cleaned up by unpushing the target
13840 in case btrace_read_config () throws. */
13841 if (!btrace_target_pushed
)
13843 btrace_target_pushed
= 1;
13844 record_btrace_push_target ();
13845 printf_filtered (_("Target is recording using %s.\n"),
13846 btrace_format_string (rs
->btrace_config
.format
));
13849 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13850 tp
->btrace
.target
->ptid
= tp
->ptid
;
13851 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13855 /* Enable branch tracing. */
13857 struct btrace_target_info
*
13858 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
13860 struct btrace_target_info
*tinfo
= NULL
;
13861 struct packet_config
*packet
= NULL
;
13862 struct remote_state
*rs
= get_remote_state ();
13863 char *buf
= rs
->buf
.data ();
13864 char *endbuf
= buf
+ get_remote_packet_size ();
13866 switch (conf
->format
)
13868 case BTRACE_FORMAT_BTS
:
13869 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13872 case BTRACE_FORMAT_PT
:
13873 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13877 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13878 error (_("Target does not support branch tracing."));
13880 btrace_sync_conf (conf
);
13882 set_general_thread (ptid
);
13884 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13886 getpkt (&rs
->buf
, 0);
13888 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13890 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13891 error (_("Could not enable branch tracing for %s: %s"),
13892 target_pid_to_str (ptid
).c_str (), &rs
->buf
[2]);
13894 error (_("Could not enable branch tracing for %s."),
13895 target_pid_to_str (ptid
).c_str ());
13898 tinfo
= XCNEW (struct btrace_target_info
);
13899 tinfo
->ptid
= ptid
;
13901 /* If we fail to read the configuration, we lose some information, but the
13902 tracing itself is not impacted. */
13905 btrace_read_config (&tinfo
->conf
);
13907 catch (const gdb_exception_error
&err
)
13909 if (err
.message
!= NULL
)
13910 warning ("%s", err
.what ());
13916 /* Disable branch tracing. */
13919 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
13921 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13922 struct remote_state
*rs
= get_remote_state ();
13923 char *buf
= rs
->buf
.data ();
13924 char *endbuf
= buf
+ get_remote_packet_size ();
13926 if (packet_config_support (packet
) != PACKET_ENABLE
)
13927 error (_("Target does not support branch tracing."));
13929 set_general_thread (tinfo
->ptid
);
13931 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13933 getpkt (&rs
->buf
, 0);
13935 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13937 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13938 error (_("Could not disable branch tracing for %s: %s"),
13939 target_pid_to_str (tinfo
->ptid
).c_str (), &rs
->buf
[2]);
13941 error (_("Could not disable branch tracing for %s."),
13942 target_pid_to_str (tinfo
->ptid
).c_str ());
13948 /* Teardown branch tracing. */
13951 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
13953 /* We must not talk to the target during teardown. */
13957 /* Read the branch trace. */
13960 remote_target::read_btrace (struct btrace_data
*btrace
,
13961 struct btrace_target_info
*tinfo
,
13962 enum btrace_read_type type
)
13964 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13967 if (packet_config_support (packet
) != PACKET_ENABLE
)
13968 error (_("Target does not support branch tracing."));
13970 #if !defined(HAVE_LIBEXPAT)
13971 error (_("Cannot process branch tracing result. XML parsing not supported."));
13976 case BTRACE_READ_ALL
:
13979 case BTRACE_READ_NEW
:
13982 case BTRACE_READ_DELTA
:
13986 internal_error (__FILE__
, __LINE__
,
13987 _("Bad branch tracing read type: %u."),
13988 (unsigned int) type
);
13991 gdb::optional
<gdb::char_vector
> xml
13992 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE
, annex
);
13994 return BTRACE_ERR_UNKNOWN
;
13996 parse_xml_btrace (btrace
, xml
->data ());
13998 return BTRACE_ERR_NONE
;
14001 const struct btrace_config
*
14002 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
14004 return &tinfo
->conf
;
14008 remote_target::augmented_libraries_svr4_read ()
14010 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
14014 /* Implementation of to_load. */
14017 remote_target::load (const char *name
, int from_tty
)
14019 generic_load (name
, from_tty
);
14022 /* Accepts an integer PID; returns a string representing a file that
14023 can be opened on the remote side to get the symbols for the child
14024 process. Returns NULL if the operation is not supported. */
14027 remote_target::pid_to_exec_file (int pid
)
14029 static gdb::optional
<gdb::char_vector
> filename
;
14030 char *annex
= NULL
;
14032 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
14035 inferior
*inf
= find_inferior_pid (this, pid
);
14037 internal_error (__FILE__
, __LINE__
,
14038 _("not currently attached to process %d"), pid
);
14040 if (!inf
->fake_pid_p
)
14042 const int annex_size
= 9;
14044 annex
= (char *) alloca (annex_size
);
14045 xsnprintf (annex
, annex_size
, "%x", pid
);
14048 filename
= target_read_stralloc (current_top_target (),
14049 TARGET_OBJECT_EXEC_FILE
, annex
);
14051 return filename
? filename
->data () : nullptr;
14054 /* Implement the to_can_do_single_step target_ops method. */
14057 remote_target::can_do_single_step ()
14059 /* We can only tell whether target supports single step or not by
14060 supported s and S vCont actions if the stub supports vContSupported
14061 feature. If the stub doesn't support vContSupported feature,
14062 we have conservatively to think target doesn't supports single
14064 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
14066 struct remote_state
*rs
= get_remote_state ();
14068 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14069 remote_vcont_probe ();
14071 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14077 /* Implementation of the to_execution_direction method for the remote
14080 enum exec_direction_kind
14081 remote_target::execution_direction ()
14083 struct remote_state
*rs
= get_remote_state ();
14085 return rs
->last_resume_exec_dir
;
14088 /* Return pointer to the thread_info struct which corresponds to
14089 THREAD_HANDLE (having length HANDLE_LEN). */
14092 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14096 for (thread_info
*tp
: all_non_exited_threads (this))
14098 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14100 if (tp
->inf
== inf
&& priv
!= NULL
)
14102 if (handle_len
!= priv
->thread_handle
.size ())
14103 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14104 handle_len
, priv
->thread_handle
.size ());
14105 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14115 remote_target::thread_info_to_thread_handle (struct thread_info
*tp
)
14117 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14118 return priv
->thread_handle
;
14122 remote_target::can_async_p ()
14124 struct remote_state
*rs
= get_remote_state ();
14126 /* We don't go async if the user has explicitly prevented it with the
14127 "maint set target-async" command. */
14128 if (!target_async_permitted
)
14131 /* We're async whenever the serial device is. */
14132 return serial_can_async_p (rs
->remote_desc
);
14136 remote_target::is_async_p ()
14138 struct remote_state
*rs
= get_remote_state ();
14140 if (!target_async_permitted
)
14141 /* We only enable async when the user specifically asks for it. */
14144 /* We're async whenever the serial device is. */
14145 return serial_is_async_p (rs
->remote_desc
);
14148 /* Pass the SERIAL event on and up to the client. One day this code
14149 will be able to delay notifying the client of an event until the
14150 point where an entire packet has been received. */
14152 static serial_event_ftype remote_async_serial_handler
;
14155 remote_async_serial_handler (struct serial
*scb
, void *context
)
14157 /* Don't propogate error information up to the client. Instead let
14158 the client find out about the error by querying the target. */
14159 inferior_event_handler (INF_REG_EVENT
, NULL
);
14163 remote_async_inferior_event_handler (gdb_client_data data
)
14165 inferior_event_handler (INF_REG_EVENT
, data
);
14169 remote_target::async_wait_fd ()
14171 struct remote_state
*rs
= get_remote_state ();
14172 return rs
->remote_desc
->fd
;
14176 remote_target::async (int enable
)
14178 struct remote_state
*rs
= get_remote_state ();
14182 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14184 /* If there are pending events in the stop reply queue tell the
14185 event loop to process them. */
14186 if (!rs
->stop_reply_queue
.empty ())
14187 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14188 /* For simplicity, below we clear the pending events token
14189 without remembering whether it is marked, so here we always
14190 mark it. If there's actually no pending notification to
14191 process, this ends up being a no-op (other than a spurious
14192 event-loop wakeup). */
14193 if (target_is_non_stop_p ())
14194 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14198 serial_async (rs
->remote_desc
, NULL
, NULL
);
14199 /* If the core is disabling async, it doesn't want to be
14200 disturbed with target events. Clear all async event sources
14202 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14203 if (target_is_non_stop_p ())
14204 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14208 /* Implementation of the to_thread_events method. */
14211 remote_target::thread_events (int enable
)
14213 struct remote_state
*rs
= get_remote_state ();
14214 size_t size
= get_remote_packet_size ();
14216 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14219 xsnprintf (rs
->buf
.data (), size
, "QThreadEvents:%x", enable
? 1 : 0);
14221 getpkt (&rs
->buf
, 0);
14223 switch (packet_ok (rs
->buf
,
14224 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14227 if (strcmp (rs
->buf
.data (), "OK") != 0)
14228 error (_("Remote refused setting thread events: %s"), rs
->buf
.data ());
14231 warning (_("Remote failure reply: %s"), rs
->buf
.data ());
14233 case PACKET_UNKNOWN
:
14239 show_remote_cmd (const char *args
, int from_tty
)
14241 /* We can't just use cmd_show_list here, because we want to skip
14242 the redundant "show remote Z-packet" and the legacy aliases. */
14243 struct cmd_list_element
*list
= remote_show_cmdlist
;
14244 struct ui_out
*uiout
= current_uiout
;
14246 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14247 for (; list
!= NULL
; list
= list
->next
)
14248 if (strcmp (list
->name
, "Z-packet") == 0)
14250 else if (list
->type
== not_set_cmd
)
14251 /* Alias commands are exactly like the original, except they
14252 don't have the normal type. */
14256 ui_out_emit_tuple
option_emitter (uiout
, "option");
14258 uiout
->field_string ("name", list
->name
);
14259 uiout
->text (": ");
14260 if (list
->type
== show_cmd
)
14261 do_show_command (NULL
, from_tty
, list
);
14263 cmd_func (list
, NULL
, from_tty
);
14268 /* Function to be called whenever a new objfile (shlib) is detected. */
14270 remote_new_objfile (struct objfile
*objfile
)
14272 remote_target
*remote
= get_current_remote_target ();
14274 if (remote
!= NULL
) /* Have a remote connection. */
14275 remote
->remote_check_symbols ();
14278 /* Pull all the tracepoints defined on the target and create local
14279 data structures representing them. We don't want to create real
14280 tracepoints yet, we don't want to mess up the user's existing
14284 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14286 struct remote_state
*rs
= get_remote_state ();
14289 /* Ask for a first packet of tracepoint definition. */
14291 getpkt (&rs
->buf
, 0);
14292 p
= rs
->buf
.data ();
14293 while (*p
&& *p
!= 'l')
14295 parse_tracepoint_definition (p
, utpp
);
14296 /* Ask for another packet of tracepoint definition. */
14298 getpkt (&rs
->buf
, 0);
14299 p
= rs
->buf
.data ();
14305 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14307 struct remote_state
*rs
= get_remote_state ();
14310 /* Ask for a first packet of variable definition. */
14312 getpkt (&rs
->buf
, 0);
14313 p
= rs
->buf
.data ();
14314 while (*p
&& *p
!= 'l')
14316 parse_tsv_definition (p
, utsvp
);
14317 /* Ask for another packet of variable definition. */
14319 getpkt (&rs
->buf
, 0);
14320 p
= rs
->buf
.data ();
14325 /* The "set/show range-stepping" show hook. */
14328 show_range_stepping (struct ui_file
*file
, int from_tty
,
14329 struct cmd_list_element
*c
,
14332 fprintf_filtered (file
,
14333 _("Debugger's willingness to use range stepping "
14334 "is %s.\n"), value
);
14337 /* Return true if the vCont;r action is supported by the remote
14341 remote_target::vcont_r_supported ()
14343 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14344 remote_vcont_probe ();
14346 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14347 && get_remote_state ()->supports_vCont
.r
);
14350 /* The "set/show range-stepping" set hook. */
14353 set_range_stepping (const char *ignore_args
, int from_tty
,
14354 struct cmd_list_element
*c
)
14356 /* When enabling, check whether range stepping is actually supported
14357 by the target, and warn if not. */
14358 if (use_range_stepping
)
14360 remote_target
*remote
= get_current_remote_target ();
14362 || !remote
->vcont_r_supported ())
14363 warning (_("Range stepping is not supported by the current target"));
14367 void _initialize_remote ();
14369 _initialize_remote ()
14371 struct cmd_list_element
*cmd
;
14372 const char *cmd_name
;
14374 /* architecture specific data */
14375 remote_g_packet_data_handle
=
14376 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14378 add_target (remote_target_info
, remote_target::open
);
14379 add_target (extended_remote_target_info
, extended_remote_target::open
);
14381 /* Hook into new objfile notification. */
14382 gdb::observers::new_objfile
.attach (remote_new_objfile
);
14385 init_remote_threadtests ();
14388 /* set/show remote ... */
14390 add_basic_prefix_cmd ("remote", class_maintenance
, _("\
14391 Remote protocol specific variables.\n\
14392 Configure various remote-protocol specific variables such as\n\
14393 the packets being used."),
14394 &remote_set_cmdlist
, "set remote ",
14395 0 /* allow-unknown */, &setlist
);
14396 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14397 Remote protocol specific variables.\n\
14398 Configure various remote-protocol specific variables such as\n\
14399 the packets being used."),
14400 &remote_show_cmdlist
, "show remote ",
14401 0 /* allow-unknown */, &showlist
);
14403 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14404 Compare section data on target to the exec file.\n\
14405 Argument is a single section name (default: all loaded sections).\n\
14406 To compare only read-only loaded sections, specify the -r option."),
14409 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14410 Send an arbitrary packet to a remote target.\n\
14411 maintenance packet TEXT\n\
14412 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14413 this command sends the string TEXT to the inferior, and displays the\n\
14414 response packet. GDB supplies the initial `$' character, and the\n\
14415 terminating `#' character and checksum."),
14418 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14419 Set whether to send break if interrupted."), _("\
14420 Show whether to send break if interrupted."), _("\
14421 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14422 set_remotebreak
, show_remotebreak
,
14423 &setlist
, &showlist
);
14424 cmd_name
= "remotebreak";
14425 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
14426 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14427 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14428 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
14429 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14431 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14432 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14434 Set interrupt sequence to remote target."), _("\
14435 Show interrupt sequence to remote target."), _("\
14436 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14437 NULL
, show_interrupt_sequence
,
14438 &remote_set_cmdlist
,
14439 &remote_show_cmdlist
);
14441 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14442 &interrupt_on_connect
, _("\
14443 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14444 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _("\
14445 If set, interrupt sequence is sent to remote target."),
14447 &remote_set_cmdlist
, &remote_show_cmdlist
);
14449 /* Install commands for configuring memory read/write packets. */
14451 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14452 Set the maximum number of bytes per memory write packet (deprecated)."),
14454 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14455 Show the maximum number of bytes per memory write packet (deprecated)."),
14457 add_cmd ("memory-write-packet-size", no_class
,
14458 set_memory_write_packet_size
, _("\
14459 Set the maximum number of bytes per memory-write packet.\n\
14460 Specify the number of bytes in a packet or 0 (zero) for the\n\
14461 default packet size. The actual limit is further reduced\n\
14462 dependent on the target. Specify ``fixed'' to disable the\n\
14463 further restriction and ``limit'' to enable that restriction."),
14464 &remote_set_cmdlist
);
14465 add_cmd ("memory-read-packet-size", no_class
,
14466 set_memory_read_packet_size
, _("\
14467 Set the maximum number of bytes per memory-read packet.\n\
14468 Specify the number of bytes in a packet or 0 (zero) for the\n\
14469 default packet size. The actual limit is further reduced\n\
14470 dependent on the target. Specify ``fixed'' to disable the\n\
14471 further restriction and ``limit'' to enable that restriction."),
14472 &remote_set_cmdlist
);
14473 add_cmd ("memory-write-packet-size", no_class
,
14474 show_memory_write_packet_size
,
14475 _("Show the maximum number of bytes per memory-write packet."),
14476 &remote_show_cmdlist
);
14477 add_cmd ("memory-read-packet-size", no_class
,
14478 show_memory_read_packet_size
,
14479 _("Show the maximum number of bytes per memory-read packet."),
14480 &remote_show_cmdlist
);
14482 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14483 &remote_hw_watchpoint_limit
, _("\
14484 Set the maximum number of target hardware watchpoints."), _("\
14485 Show the maximum number of target hardware watchpoints."), _("\
14486 Specify \"unlimited\" for unlimited hardware watchpoints."),
14487 NULL
, show_hardware_watchpoint_limit
,
14488 &remote_set_cmdlist
,
14489 &remote_show_cmdlist
);
14490 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14492 &remote_hw_watchpoint_length_limit
, _("\
14493 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14494 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14495 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14496 NULL
, show_hardware_watchpoint_length_limit
,
14497 &remote_set_cmdlist
, &remote_show_cmdlist
);
14498 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14499 &remote_hw_breakpoint_limit
, _("\
14500 Set the maximum number of target hardware breakpoints."), _("\
14501 Show the maximum number of target hardware breakpoints."), _("\
14502 Specify \"unlimited\" for unlimited hardware breakpoints."),
14503 NULL
, show_hardware_breakpoint_limit
,
14504 &remote_set_cmdlist
, &remote_show_cmdlist
);
14506 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14507 &remote_address_size
, _("\
14508 Set the maximum size of the address (in bits) in a memory packet."), _("\
14509 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14511 NULL
, /* FIXME: i18n: */
14512 &setlist
, &showlist
);
14514 init_all_packet_configs ();
14516 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14517 "X", "binary-download", 1);
14519 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14520 "vCont", "verbose-resume", 0);
14522 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14523 "QPassSignals", "pass-signals", 0);
14525 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14526 "QCatchSyscalls", "catch-syscalls", 0);
14528 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14529 "QProgramSignals", "program-signals", 0);
14531 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14532 "QSetWorkingDir", "set-working-dir", 0);
14534 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14535 "QStartupWithShell", "startup-with-shell", 0);
14537 add_packet_config_cmd (&remote_protocol_packets
14538 [PACKET_QEnvironmentHexEncoded
],
14539 "QEnvironmentHexEncoded", "environment-hex-encoded",
14542 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14543 "QEnvironmentReset", "environment-reset",
14546 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14547 "QEnvironmentUnset", "environment-unset",
14550 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14551 "qSymbol", "symbol-lookup", 0);
14553 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14554 "P", "set-register", 1);
14556 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14557 "p", "fetch-register", 1);
14559 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14560 "Z0", "software-breakpoint", 0);
14562 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14563 "Z1", "hardware-breakpoint", 0);
14565 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14566 "Z2", "write-watchpoint", 0);
14568 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14569 "Z3", "read-watchpoint", 0);
14571 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14572 "Z4", "access-watchpoint", 0);
14574 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14575 "qXfer:auxv:read", "read-aux-vector", 0);
14577 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14578 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14580 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14581 "qXfer:features:read", "target-features", 0);
14583 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14584 "qXfer:libraries:read", "library-info", 0);
14586 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14587 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14589 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14590 "qXfer:memory-map:read", "memory-map", 0);
14592 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14593 "qXfer:osdata:read", "osdata", 0);
14595 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14596 "qXfer:threads:read", "threads", 0);
14598 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14599 "qXfer:siginfo:read", "read-siginfo-object", 0);
14601 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14602 "qXfer:siginfo:write", "write-siginfo-object", 0);
14604 add_packet_config_cmd
14605 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14606 "qXfer:traceframe-info:read", "traceframe-info", 0);
14608 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14609 "qXfer:uib:read", "unwind-info-block", 0);
14611 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14612 "qGetTLSAddr", "get-thread-local-storage-address",
14615 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14616 "qGetTIBAddr", "get-thread-information-block-address",
14619 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14620 "bc", "reverse-continue", 0);
14622 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14623 "bs", "reverse-step", 0);
14625 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14626 "qSupported", "supported-packets", 0);
14628 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14629 "qSearch:memory", "search-memory", 0);
14631 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14632 "qTStatus", "trace-status", 0);
14634 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14635 "vFile:setfs", "hostio-setfs", 0);
14637 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14638 "vFile:open", "hostio-open", 0);
14640 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14641 "vFile:pread", "hostio-pread", 0);
14643 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14644 "vFile:pwrite", "hostio-pwrite", 0);
14646 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14647 "vFile:close", "hostio-close", 0);
14649 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14650 "vFile:unlink", "hostio-unlink", 0);
14652 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14653 "vFile:readlink", "hostio-readlink", 0);
14655 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14656 "vFile:fstat", "hostio-fstat", 0);
14658 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14659 "vAttach", "attach", 0);
14661 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14664 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14665 "QStartNoAckMode", "noack", 0);
14667 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14668 "vKill", "kill", 0);
14670 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14671 "qAttached", "query-attached", 0);
14673 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14674 "ConditionalTracepoints",
14675 "conditional-tracepoints", 0);
14677 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14678 "ConditionalBreakpoints",
14679 "conditional-breakpoints", 0);
14681 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14682 "BreakpointCommands",
14683 "breakpoint-commands", 0);
14685 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14686 "FastTracepoints", "fast-tracepoints", 0);
14688 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14689 "TracepointSource", "TracepointSource", 0);
14691 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14692 "QAllow", "allow", 0);
14694 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14695 "StaticTracepoints", "static-tracepoints", 0);
14697 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14698 "InstallInTrace", "install-in-trace", 0);
14700 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14701 "qXfer:statictrace:read", "read-sdata-object", 0);
14703 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14704 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14706 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14707 "QDisableRandomization", "disable-randomization", 0);
14709 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14710 "QAgent", "agent", 0);
14712 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14713 "QTBuffer:size", "trace-buffer-size", 0);
14715 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14716 "Qbtrace:off", "disable-btrace", 0);
14718 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14719 "Qbtrace:bts", "enable-btrace-bts", 0);
14721 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14722 "Qbtrace:pt", "enable-btrace-pt", 0);
14724 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14725 "qXfer:btrace", "read-btrace", 0);
14727 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14728 "qXfer:btrace-conf", "read-btrace-conf", 0);
14730 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14731 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14733 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14734 "multiprocess-feature", "multiprocess-feature", 0);
14736 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14737 "swbreak-feature", "swbreak-feature", 0);
14739 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14740 "hwbreak-feature", "hwbreak-feature", 0);
14742 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14743 "fork-event-feature", "fork-event-feature", 0);
14745 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14746 "vfork-event-feature", "vfork-event-feature", 0);
14748 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14749 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14751 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14752 "vContSupported", "verbose-resume-supported", 0);
14754 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14755 "exec-event-feature", "exec-event-feature", 0);
14757 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14758 "vCtrlC", "ctrl-c", 0);
14760 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14761 "QThreadEvents", "thread-events", 0);
14763 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14764 "N stop reply", "no-resumed-stop-reply", 0);
14766 /* Assert that we've registered "set remote foo-packet" commands
14767 for all packet configs. */
14771 for (i
= 0; i
< PACKET_MAX
; i
++)
14773 /* Ideally all configs would have a command associated. Some
14774 still don't though. */
14779 case PACKET_QNonStop
:
14780 case PACKET_EnableDisableTracepoints_feature
:
14781 case PACKET_tracenz_feature
:
14782 case PACKET_DisconnectedTracing_feature
:
14783 case PACKET_augmented_libraries_svr4_read_feature
:
14785 /* Additions to this list need to be well justified:
14786 pre-existing packets are OK; new packets are not. */
14794 /* This catches both forgetting to add a config command, and
14795 forgetting to remove a packet from the exception list. */
14796 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14800 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14801 Z sub-packet has its own set and show commands, but users may
14802 have sets to this variable in their .gdbinit files (or in their
14804 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14805 &remote_Z_packet_detect
, _("\
14806 Set use of remote protocol `Z' packets."), _("\
14807 Show use of remote protocol `Z' packets."), _("\
14808 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14810 set_remote_protocol_Z_packet_cmd
,
14811 show_remote_protocol_Z_packet_cmd
,
14812 /* FIXME: i18n: Use of remote protocol
14813 `Z' packets is %s. */
14814 &remote_set_cmdlist
, &remote_show_cmdlist
);
14816 add_basic_prefix_cmd ("remote", class_files
, _("\
14817 Manipulate files on the remote system.\n\
14818 Transfer files to and from the remote target system."),
14819 &remote_cmdlist
, "remote ",
14820 0 /* allow-unknown */, &cmdlist
);
14822 add_cmd ("put", class_files
, remote_put_command
,
14823 _("Copy a local file to the remote system."),
14826 add_cmd ("get", class_files
, remote_get_command
,
14827 _("Copy a remote file to the local system."),
14830 add_cmd ("delete", class_files
, remote_delete_command
,
14831 _("Delete a remote file."),
14834 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14835 &remote_exec_file_var
, _("\
14836 Set the remote pathname for \"run\"."), _("\
14837 Show the remote pathname for \"run\"."), NULL
,
14838 set_remote_exec_file
,
14839 show_remote_exec_file
,
14840 &remote_set_cmdlist
,
14841 &remote_show_cmdlist
);
14843 add_setshow_boolean_cmd ("range-stepping", class_run
,
14844 &use_range_stepping
, _("\
14845 Enable or disable range stepping."), _("\
14846 Show whether target-assisted range stepping is enabled."), _("\
14847 If on, and the target supports it, when stepping a source line, GDB\n\
14848 tells the target to step the corresponding range of addresses itself instead\n\
14849 of issuing multiple single-steps. This speeds up source level\n\
14850 stepping. If off, GDB always issues single-steps, even if range\n\
14851 stepping is supported by the target. The default is on."),
14852 set_range_stepping
,
14853 show_range_stepping
,
14857 add_setshow_zinteger_cmd ("watchdog", class_maintenance
, &watchdog
, _("\
14858 Set watchdog timer."), _("\
14859 Show watchdog timer."), _("\
14860 When non-zero, this timeout is used instead of waiting forever for a target\n\
14861 to finish a low-level step or continue operation. If the specified amount\n\
14862 of time passes without a response from the target, an error occurs."),
14865 &setlist
, &showlist
);
14867 add_setshow_zuinteger_unlimited_cmd ("remote-packet-max-chars", no_class
,
14868 &remote_packet_max_chars
, _("\
14869 Set the maximum number of characters to display for each remote packet."), _("\
14870 Show the maximum number of characters to display for each remote packet."), _("\
14871 Specify \"unlimited\" to display all the characters."),
14872 NULL
, show_remote_packet_max_chars
,
14873 &setdebuglist
, &showdebuglist
);
14875 /* Eventually initialize fileio. See fileio.c */
14876 initialize_remote_fileio (&remote_set_cmdlist
, &remote_show_cmdlist
);