1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2019 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* See the GDB User Guide for details of the GDB remote protocol. */
30 #include "process-stratum-target.h"
31 /*#include "terminal.h" */
34 #include "gdb-stabs.h"
35 #include "gdbthread.h"
37 #include "remote-notif.h"
40 #include "observable.h"
42 #include "cli/cli-decode.h"
43 #include "cli/cli-setshow.h"
44 #include "target-descriptions.h"
46 #include "filestuff.h"
51 #include "gdb_sys_time.h"
53 #include "event-loop.h"
54 #include "event-top.h"
60 #include "gdbcore.h" /* for exec_bfd */
62 #include "remote-fileio.h"
63 #include "gdb/fileio.h"
65 #include "xml-support.h"
67 #include "memory-map.h"
69 #include "tracepoint.h"
74 #include "record-btrace.h"
76 #include "common/scoped_restore.h"
78 #include "common/byte-vector.h"
79 #include <unordered_map>
81 /* The remote target. */
83 static const char remote_doc
[] = N_("\
84 Use a remote computer via a serial line, using a gdb-specific protocol.\n\
85 Specify the serial device it is connected to\n\
86 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).");
88 #define OPAQUETHREADBYTES 8
90 /* a 64 bit opaque identifier */
91 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
93 struct gdb_ext_thread_info
;
94 struct threads_listing_context
;
95 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
96 struct protocol_feature
;
100 static void stop_reply_xfree (struct stop_reply
*);
102 struct stop_reply_deleter
104 void operator() (stop_reply
*r
) const
106 stop_reply_xfree (r
);
110 typedef std::unique_ptr
<stop_reply
, stop_reply_deleter
> stop_reply_up
;
112 /* Generic configuration support for packets the stub optionally
113 supports. Allows the user to specify the use of the packet as well
114 as allowing GDB to auto-detect support in the remote stub. */
118 PACKET_SUPPORT_UNKNOWN
= 0,
123 /* Analyze a packet's return value and update the packet config
133 struct threads_listing_context
;
135 /* Stub vCont actions support.
137 Each field is a boolean flag indicating whether the stub reports
138 support for the corresponding action. */
140 struct vCont_action_support
155 /* About this many threadisds fit in a packet. */
157 #define MAXTHREADLISTRESULTS 32
159 /* Data for the vFile:pread readahead cache. */
161 struct readahead_cache
163 /* Invalidate the readahead cache. */
166 /* Invalidate the readahead cache if it is holding data for FD. */
167 void invalidate_fd (int fd
);
169 /* Serve pread from the readahead cache. Returns number of bytes
170 read, or 0 if the request can't be served from the cache. */
171 int pread (int fd
, gdb_byte
*read_buf
, size_t len
, ULONGEST offset
);
173 /* The file descriptor for the file that is being cached. -1 if the
177 /* The offset into the file that the cache buffer corresponds
181 /* The buffer holding the cache contents. */
182 gdb_byte
*buf
= nullptr;
183 /* The buffer's size. We try to read as much as fits into a packet
187 /* Cache hit and miss counters. */
188 ULONGEST hit_count
= 0;
189 ULONGEST miss_count
= 0;
192 /* Description of the remote protocol for a given architecture. */
196 long offset
; /* Offset into G packet. */
197 long regnum
; /* GDB's internal register number. */
198 LONGEST pnum
; /* Remote protocol register number. */
199 int in_g_packet
; /* Always part of G packet. */
200 /* long size in bytes; == register_size (target_gdbarch (), regnum);
202 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
206 struct remote_arch_state
208 explicit remote_arch_state (struct gdbarch
*gdbarch
);
210 /* Description of the remote protocol registers. */
211 long sizeof_g_packet
;
213 /* Description of the remote protocol registers indexed by REGNUM
214 (making an array gdbarch_num_regs in size). */
215 std::unique_ptr
<packet_reg
[]> regs
;
217 /* This is the size (in chars) of the first response to the ``g''
218 packet. It is used as a heuristic when determining the maximum
219 size of memory-read and memory-write packets. A target will
220 typically only reserve a buffer large enough to hold the ``g''
221 packet. The size does not include packet overhead (headers and
223 long actual_register_packet_size
;
225 /* This is the maximum size (in chars) of a non read/write packet.
226 It is also used as a cap on the size of read/write packets. */
227 long remote_packet_size
;
230 /* Description of the remote protocol state for the currently
231 connected target. This is per-target state, and independent of the
232 selected architecture. */
241 /* Get the remote arch state for GDBARCH. */
242 struct remote_arch_state
*get_remote_arch_state (struct gdbarch
*gdbarch
);
246 /* A buffer to use for incoming packets, and its current size. The
247 buffer is grown dynamically for larger incoming packets.
248 Outgoing packets may also be constructed in this buffer.
249 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
250 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
255 /* True if we're going through initial connection setup (finding out
256 about the remote side's threads, relocating symbols, etc.). */
257 bool starting_up
= false;
259 /* If we negotiated packet size explicitly (and thus can bypass
260 heuristics for the largest packet size that will not overflow
261 a buffer in the stub), this will be set to that packet size.
262 Otherwise zero, meaning to use the guessed size. */
263 long explicit_packet_size
= 0;
265 /* remote_wait is normally called when the target is running and
266 waits for a stop reply packet. But sometimes we need to call it
267 when the target is already stopped. We can send a "?" packet
268 and have remote_wait read the response. Or, if we already have
269 the response, we can stash it in BUF and tell remote_wait to
270 skip calling getpkt. This flag is set when BUF contains a
271 stop reply packet and the target is not waiting. */
272 int cached_wait_status
= 0;
274 /* True, if in no ack mode. That is, neither GDB nor the stub will
275 expect acks from each other. The connection is assumed to be
277 bool noack_mode
= false;
279 /* True if we're connected in extended remote mode. */
280 bool extended
= false;
282 /* True if we resumed the target and we're waiting for the target to
283 stop. In the mean time, we can't start another command/query.
284 The remote server wouldn't be ready to process it, so we'd
285 timeout waiting for a reply that would never come and eventually
286 we'd close the connection. This can happen in asynchronous mode
287 because we allow GDB commands while the target is running. */
288 bool waiting_for_stop_reply
= false;
290 /* The status of the stub support for the various vCont actions. */
291 vCont_action_support supports_vCont
;
293 /* True if the user has pressed Ctrl-C, but the target hasn't
294 responded to that. */
295 bool ctrlc_pending_p
= false;
297 /* True if we saw a Ctrl-C while reading or writing from/to the
298 remote descriptor. At that point it is not safe to send a remote
299 interrupt packet, so we instead remember we saw the Ctrl-C and
300 process it once we're done with sending/receiving the current
301 packet, which should be shortly. If however that takes too long,
302 and the user presses Ctrl-C again, we offer to disconnect. */
303 bool got_ctrlc_during_io
= false;
305 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
306 remote_open knows that we don't have a file open when the program
308 struct serial
*remote_desc
= nullptr;
310 /* These are the threads which we last sent to the remote system. The
311 TID member will be -1 for all or -2 for not sent yet. */
312 ptid_t general_thread
= null_ptid
;
313 ptid_t continue_thread
= null_ptid
;
315 /* This is the traceframe which we last selected on the remote system.
316 It will be -1 if no traceframe is selected. */
317 int remote_traceframe_number
= -1;
319 char *last_pass_packet
= nullptr;
321 /* The last QProgramSignals packet sent to the target. We bypass
322 sending a new program signals list down to the target if the new
323 packet is exactly the same as the last we sent. IOW, we only let
324 the target know about program signals list changes. */
325 char *last_program_signals_packet
= nullptr;
327 gdb_signal last_sent_signal
= GDB_SIGNAL_0
;
329 bool last_sent_step
= false;
331 /* The execution direction of the last resume we got. */
332 exec_direction_kind last_resume_exec_dir
= EXEC_FORWARD
;
334 char *finished_object
= nullptr;
335 char *finished_annex
= nullptr;
336 ULONGEST finished_offset
= 0;
338 /* Should we try the 'ThreadInfo' query packet?
340 This variable (NOT available to the user: auto-detect only!)
341 determines whether GDB will use the new, simpler "ThreadInfo"
342 query or the older, more complex syntax for thread queries.
343 This is an auto-detect variable (set to true at each connect,
344 and set to false when the target fails to recognize it). */
345 bool use_threadinfo_query
= false;
346 bool use_threadextra_query
= false;
348 threadref echo_nextthread
{};
349 threadref nextthread
{};
350 threadref resultthreadlist
[MAXTHREADLISTRESULTS
] {};
352 /* The state of remote notification. */
353 struct remote_notif_state
*notif_state
= nullptr;
355 /* The branch trace configuration. */
356 struct btrace_config btrace_config
{};
358 /* The argument to the last "vFile:setfs:" packet we sent, used
359 to avoid sending repeated unnecessary "vFile:setfs:" packets.
360 Initialized to -1 to indicate that no "vFile:setfs:" packet
361 has yet been sent. */
364 /* A readahead cache for vFile:pread. Often, reading a binary
365 involves a sequence of small reads. E.g., when parsing an ELF
366 file. A readahead cache helps mostly the case of remote
367 debugging on a connection with higher latency, due to the
368 request/reply nature of the RSP. We only cache data for a single
369 file descriptor at a time. */
370 struct readahead_cache readahead_cache
;
372 /* The list of already fetched and acknowledged stop events. This
373 queue is used for notification Stop, and other notifications
374 don't need queue for their events, because the notification
375 events of Stop can't be consumed immediately, so that events
376 should be queued first, and be consumed by remote_wait_{ns,as}
377 one per time. Other notifications can consume their events
378 immediately, so queue is not needed for them. */
379 std::vector
<stop_reply_up
> stop_reply_queue
;
381 /* Asynchronous signal handle registered as event loop source for
382 when we have pending events ready to be passed to the core. */
383 struct async_event_handler
*remote_async_inferior_event_token
= nullptr;
385 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
386 ``forever'' still use the normal timeout mechanism. This is
387 currently used by the ASYNC code to guarentee that target reads
388 during the initial connect always time-out. Once getpkt has been
389 modified to return a timeout indication and, in turn
390 remote_wait()/wait_for_inferior() have gained a timeout parameter
392 int wait_forever_enabled_p
= 1;
395 /* Mapping of remote protocol data for each gdbarch. Usually there
396 is only one entry here, though we may see more with stubs that
397 support multi-process. */
398 std::unordered_map
<struct gdbarch
*, remote_arch_state
>
402 static const target_info remote_target_info
= {
404 N_("Remote serial target in gdb-specific protocol"),
408 class remote_target
: public process_stratum_target
411 remote_target () = default;
412 ~remote_target () override
;
414 const target_info
&info () const override
415 { return remote_target_info
; }
417 thread_control_capabilities
get_thread_control_capabilities () override
418 { return tc_schedlock
; }
420 /* Open a remote connection. */
421 static void open (const char *, int);
423 void close () override
;
425 void detach (inferior
*, int) override
;
426 void disconnect (const char *, int) override
;
428 void commit_resume () override
;
429 void resume (ptid_t
, int, enum gdb_signal
) override
;
430 ptid_t
wait (ptid_t
, struct target_waitstatus
*, int) override
;
432 void fetch_registers (struct regcache
*, int) override
;
433 void store_registers (struct regcache
*, int) override
;
434 void prepare_to_store (struct regcache
*) override
;
436 void files_info () override
;
438 int insert_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
440 int remove_breakpoint (struct gdbarch
*, struct bp_target_info
*,
441 enum remove_bp_reason
) override
;
444 bool stopped_by_sw_breakpoint () override
;
445 bool supports_stopped_by_sw_breakpoint () override
;
447 bool stopped_by_hw_breakpoint () override
;
449 bool supports_stopped_by_hw_breakpoint () override
;
451 bool stopped_by_watchpoint () override
;
453 bool stopped_data_address (CORE_ADDR
*) override
;
455 bool watchpoint_addr_within_range (CORE_ADDR
, CORE_ADDR
, int) override
;
457 int can_use_hw_breakpoint (enum bptype
, int, int) override
;
459 int insert_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
461 int remove_hw_breakpoint (struct gdbarch
*, struct bp_target_info
*) override
;
463 int region_ok_for_hw_watchpoint (CORE_ADDR
, int) override
;
465 int insert_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
466 struct expression
*) override
;
468 int remove_watchpoint (CORE_ADDR
, int, enum target_hw_bp_type
,
469 struct expression
*) override
;
471 void kill () override
;
473 void load (const char *, int) override
;
475 void mourn_inferior () override
;
477 void pass_signals (int, unsigned char *) override
;
479 int set_syscall_catchpoint (int, bool, int,
480 gdb::array_view
<const int>) override
;
482 void program_signals (int, unsigned char *) override
;
484 bool thread_alive (ptid_t ptid
) override
;
486 const char *thread_name (struct thread_info
*) override
;
488 void update_thread_list () override
;
490 const char *pid_to_str (ptid_t
) override
;
492 const char *extra_thread_info (struct thread_info
*) override
;
494 ptid_t
get_ada_task_ptid (long lwp
, long thread
) override
;
496 thread_info
*thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
498 inferior
*inf
) override
;
500 void stop (ptid_t
) override
;
502 void interrupt () override
;
504 void pass_ctrlc () override
;
506 enum target_xfer_status
xfer_partial (enum target_object object
,
509 const gdb_byte
*writebuf
,
510 ULONGEST offset
, ULONGEST len
,
511 ULONGEST
*xfered_len
) override
;
513 ULONGEST
get_memory_xfer_limit () override
;
515 void rcmd (const char *command
, struct ui_file
*output
) override
;
517 char *pid_to_exec_file (int pid
) override
;
519 void log_command (const char *cmd
) override
521 serial_log_command (this, cmd
);
524 CORE_ADDR
get_thread_local_address (ptid_t ptid
,
525 CORE_ADDR load_module_addr
,
526 CORE_ADDR offset
) override
;
528 bool can_execute_reverse () override
;
530 std::vector
<mem_region
> memory_map () override
;
532 void flash_erase (ULONGEST address
, LONGEST length
) override
;
534 void flash_done () override
;
536 const struct target_desc
*read_description () override
;
538 int search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
539 const gdb_byte
*pattern
, ULONGEST pattern_len
,
540 CORE_ADDR
*found_addrp
) override
;
542 bool can_async_p () override
;
544 bool is_async_p () override
;
546 void async (int) 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 int follow_fork (int, int) override
;
679 void follow_exec (struct inferior
*, 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 (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 (int 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
);
897 long read_frame (char **buf_p
, long *sizeof_buf
);
898 void getpkt (char **buf
, long *sizeof_buf
, int forever
);
899 int getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
900 int expecting_notif
, int *is_notif
);
901 int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
902 int getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
904 int remote_vkill (int pid
);
905 void remote_kill_k ();
907 void extended_remote_disable_randomization (int val
);
908 int extended_remote_run (const std::string
&args
);
910 void send_environment_packet (const char *action
,
914 void extended_remote_environment_support ();
915 void extended_remote_set_inferior_cwd ();
917 target_xfer_status
remote_write_qxfer (const char *object_name
,
919 const gdb_byte
*writebuf
,
920 ULONGEST offset
, LONGEST len
,
921 ULONGEST
*xfered_len
,
922 struct packet_config
*packet
);
924 target_xfer_status
remote_read_qxfer (const char *object_name
,
926 gdb_byte
*readbuf
, ULONGEST offset
,
928 ULONGEST
*xfered_len
,
929 struct packet_config
*packet
);
931 void push_stop_reply (struct stop_reply
*new_event
);
933 bool vcont_r_supported ();
935 void packet_command (const char *args
, int from_tty
);
937 private: /* data fields */
939 /* The remote state. Don't reference this directly. Use the
940 get_remote_state method instead. */
941 remote_state m_remote_state
;
944 static const target_info extended_remote_target_info
= {
946 N_("Extended remote serial target in gdb-specific protocol"),
950 /* Set up the extended remote target by extending the standard remote
951 target and adding to it. */
953 class extended_remote_target final
: public remote_target
956 const target_info
&info () const override
957 { return extended_remote_target_info
; }
959 /* Open an extended-remote connection. */
960 static void open (const char *, int);
962 bool can_create_inferior () override
{ return true; }
963 void create_inferior (const char *, const std::string
&,
964 char **, int) override
;
966 void detach (inferior
*, int) override
;
968 bool can_attach () override
{ return true; }
969 void attach (const char *, int) override
;
971 void post_attach (int) override
;
972 bool supports_disable_randomization () override
;
975 /* Per-program-space data key. */
976 static const struct program_space_data
*remote_pspace_data
;
978 /* The variable registered as the control variable used by the
979 remote exec-file commands. While the remote exec-file setting is
980 per-program-space, the set/show machinery uses this as the
981 location of the remote exec-file value. */
982 static char *remote_exec_file_var
;
984 /* The size to align memory write packets, when practical. The protocol
985 does not guarantee any alignment, and gdb will generate short
986 writes and unaligned writes, but even as a best-effort attempt this
987 can improve bulk transfers. For instance, if a write is misaligned
988 relative to the target's data bus, the stub may need to make an extra
989 round trip fetching data from the target. This doesn't make a
990 huge difference, but it's easy to do, so we try to be helpful.
992 The alignment chosen is arbitrary; usually data bus width is
993 important here, not the possibly larger cache line size. */
994 enum { REMOTE_ALIGN_WRITES
= 16 };
996 /* Prototypes for local functions. */
998 static int hexnumlen (ULONGEST num
);
1000 static int stubhex (int ch
);
1002 static int hexnumstr (char *, ULONGEST
);
1004 static int hexnumnstr (char *, ULONGEST
, int);
1006 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
1008 static void print_packet (const char *);
1010 static int stub_unpack_int (char *buff
, int fieldlength
);
1012 struct packet_config
;
1014 static void show_packet_config_cmd (struct packet_config
*config
);
1016 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
1018 struct cmd_list_element
*c
,
1021 static ptid_t
read_ptid (const char *buf
, const char **obuf
);
1023 static void remote_async_inferior_event_handler (gdb_client_data
);
1025 static bool remote_read_description_p (struct target_ops
*target
);
1027 static void remote_console_output (char *msg
);
1029 static void remote_btrace_reset (remote_state
*rs
);
1031 static void remote_unpush_and_throw (void);
1035 static struct cmd_list_element
*remote_cmdlist
;
1037 /* For "set remote" and "show remote". */
1039 static struct cmd_list_element
*remote_set_cmdlist
;
1040 static struct cmd_list_element
*remote_show_cmdlist
;
1042 /* Controls whether GDB is willing to use range stepping. */
1044 static int use_range_stepping
= 1;
1046 /* The max number of chars in debug output. The rest of chars are
1049 #define REMOTE_DEBUG_MAX_CHAR 512
1051 /* Private data that we'll store in (struct thread_info)->priv. */
1052 struct remote_thread_info
: public private_thread_info
1058 /* Thread handle, perhaps a pthread_t or thread_t value, stored as a
1059 sequence of bytes. */
1060 gdb::byte_vector thread_handle
;
1062 /* Whether the target stopped for a breakpoint/watchpoint. */
1063 enum target_stop_reason stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
1065 /* This is set to the data address of the access causing the target
1066 to stop for a watchpoint. */
1067 CORE_ADDR watch_data_address
= 0;
1069 /* Fields used by the vCont action coalescing implemented in
1070 remote_resume / remote_commit_resume. remote_resume stores each
1071 thread's last resume request in these fields, so that a later
1072 remote_commit_resume knows which is the proper action for this
1073 thread to include in the vCont packet. */
1075 /* True if the last target_resume call for this thread was a step
1076 request, false if a continue request. */
1077 int last_resume_step
= 0;
1079 /* The signal specified in the last target_resume call for this
1081 gdb_signal last_resume_sig
= GDB_SIGNAL_0
;
1083 /* Whether this thread was already vCont-resumed on the remote
1085 int vcont_resumed
= 0;
1088 remote_state::remote_state ()
1090 /* The default buffer size is unimportant; it will be expanded
1091 whenever a larger buffer is needed. */
1092 this->buf_size
= 400;
1093 this->buf
= (char *) xmalloc (this->buf_size
);
1096 remote_state::~remote_state ()
1098 xfree (this->last_pass_packet
);
1099 xfree (this->last_program_signals_packet
);
1101 xfree (this->finished_object
);
1102 xfree (this->finished_annex
);
1105 /* Utility: generate error from an incoming stub packet. */
1107 trace_error (char *buf
)
1110 return; /* not an error msg */
1113 case '1': /* malformed packet error */
1114 if (*++buf
== '0') /* general case: */
1115 error (_("remote.c: error in outgoing packet."));
1117 error (_("remote.c: error in outgoing packet at field #%ld."),
1118 strtol (buf
, NULL
, 16));
1120 error (_("Target returns error code '%s'."), buf
);
1124 /* Utility: wait for reply from stub, while accepting "O" packets. */
1127 remote_target::remote_get_noisy_reply ()
1129 struct remote_state
*rs
= get_remote_state ();
1131 do /* Loop on reply from remote stub. */
1135 QUIT
; /* Allow user to bail out with ^C. */
1136 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1140 else if (startswith (buf
, "qRelocInsn:"))
1143 CORE_ADDR from
, to
, org_to
;
1145 int adjusted_size
= 0;
1148 p
= buf
+ strlen ("qRelocInsn:");
1149 pp
= unpack_varlen_hex (p
, &ul
);
1151 error (_("invalid qRelocInsn packet: %s"), buf
);
1155 unpack_varlen_hex (p
, &ul
);
1162 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
1165 CATCH (ex
, RETURN_MASK_ALL
)
1167 if (ex
.error
== MEMORY_ERROR
)
1169 /* Propagate memory errors silently back to the
1170 target. The stub may have limited the range of
1171 addresses we can write to, for example. */
1175 /* Something unexpectedly bad happened. Be verbose
1176 so we can tell what, and propagate the error back
1177 to the stub, so it doesn't get stuck waiting for
1179 exception_fprintf (gdb_stderr
, ex
,
1180 _("warning: relocating instruction: "));
1188 adjusted_size
= to
- org_to
;
1190 xsnprintf (buf
, rs
->buf_size
, "qRelocInsn:%x", adjusted_size
);
1194 else if (buf
[0] == 'O' && buf
[1] != 'K')
1195 remote_console_output (buf
+ 1); /* 'O' message from stub */
1197 return buf
; /* Here's the actual reply. */
1202 struct remote_arch_state
*
1203 remote_state::get_remote_arch_state (struct gdbarch
*gdbarch
)
1205 remote_arch_state
*rsa
;
1207 auto it
= this->m_arch_states
.find (gdbarch
);
1208 if (it
== this->m_arch_states
.end ())
1210 auto p
= this->m_arch_states
.emplace (std::piecewise_construct
,
1211 std::forward_as_tuple (gdbarch
),
1212 std::forward_as_tuple (gdbarch
));
1213 rsa
= &p
.first
->second
;
1215 /* Make sure that the packet buffer is plenty big enough for
1216 this architecture. */
1217 if (this->buf_size
< rsa
->remote_packet_size
)
1219 this->buf_size
= 2 * rsa
->remote_packet_size
;
1220 this->buf
= (char *) xrealloc (this->buf
, this->buf_size
);
1229 /* Fetch the global remote target state. */
1232 remote_target::get_remote_state ()
1234 /* Make sure that the remote architecture state has been
1235 initialized, because doing so might reallocate rs->buf. Any
1236 function which calls getpkt also needs to be mindful of changes
1237 to rs->buf, but this call limits the number of places which run
1239 m_remote_state
.get_remote_arch_state (target_gdbarch ());
1241 return &m_remote_state
;
1244 /* Cleanup routine for the remote module's pspace data. */
1247 remote_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
1249 char *remote_exec_file
= (char *) arg
;
1251 xfree (remote_exec_file
);
1254 /* Fetch the remote exec-file from the current program space. */
1257 get_remote_exec_file (void)
1259 char *remote_exec_file
;
1262 = (char *) program_space_data (current_program_space
,
1263 remote_pspace_data
);
1264 if (remote_exec_file
== NULL
)
1267 return remote_exec_file
;
1270 /* Set the remote exec file for PSPACE. */
1273 set_pspace_remote_exec_file (struct program_space
*pspace
,
1274 char *remote_exec_file
)
1276 char *old_file
= (char *) program_space_data (pspace
, remote_pspace_data
);
1279 set_program_space_data (pspace
, remote_pspace_data
,
1280 xstrdup (remote_exec_file
));
1283 /* The "set/show remote exec-file" set command hook. */
1286 set_remote_exec_file (const char *ignored
, int from_tty
,
1287 struct cmd_list_element
*c
)
1289 gdb_assert (remote_exec_file_var
!= NULL
);
1290 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
1293 /* The "set/show remote exec-file" show command hook. */
1296 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
1297 struct cmd_list_element
*cmd
, const char *value
)
1299 fprintf_filtered (file
, "%s\n", remote_exec_file_var
);
1303 compare_pnums (const void *lhs_
, const void *rhs_
)
1305 const struct packet_reg
* const *lhs
1306 = (const struct packet_reg
* const *) lhs_
;
1307 const struct packet_reg
* const *rhs
1308 = (const struct packet_reg
* const *) rhs_
;
1310 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
1312 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
1319 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
1321 int regnum
, num_remote_regs
, offset
;
1322 struct packet_reg
**remote_regs
;
1324 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
1326 struct packet_reg
*r
= ®s
[regnum
];
1328 if (register_size (gdbarch
, regnum
) == 0)
1329 /* Do not try to fetch zero-sized (placeholder) registers. */
1332 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
1337 /* Define the g/G packet format as the contents of each register
1338 with a remote protocol number, in order of ascending protocol
1341 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
1342 for (num_remote_regs
= 0, regnum
= 0;
1343 regnum
< gdbarch_num_regs (gdbarch
);
1345 if (regs
[regnum
].pnum
!= -1)
1346 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
1348 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
1351 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
1353 remote_regs
[regnum
]->in_g_packet
= 1;
1354 remote_regs
[regnum
]->offset
= offset
;
1355 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
1361 /* Given the architecture described by GDBARCH, return the remote
1362 protocol register's number and the register's offset in the g/G
1363 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
1364 If the target does not have a mapping for REGNUM, return false,
1365 otherwise, return true. */
1368 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
1369 int *pnum
, int *poffset
)
1371 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
1373 std::vector
<packet_reg
> regs (gdbarch_num_regs (gdbarch
));
1375 map_regcache_remote_table (gdbarch
, regs
.data ());
1377 *pnum
= regs
[regnum
].pnum
;
1378 *poffset
= regs
[regnum
].offset
;
1383 remote_arch_state::remote_arch_state (struct gdbarch
*gdbarch
)
1385 /* Use the architecture to build a regnum<->pnum table, which will be
1386 1:1 unless a feature set specifies otherwise. */
1387 this->regs
.reset (new packet_reg
[gdbarch_num_regs (gdbarch
)] ());
1389 /* Record the maximum possible size of the g packet - it may turn out
1391 this->sizeof_g_packet
1392 = map_regcache_remote_table (gdbarch
, this->regs
.get ());
1394 /* Default maximum number of characters in a packet body. Many
1395 remote stubs have a hardwired buffer size of 400 bytes
1396 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
1397 as the maximum packet-size to ensure that the packet and an extra
1398 NUL character can always fit in the buffer. This stops GDB
1399 trashing stubs that try to squeeze an extra NUL into what is
1400 already a full buffer (As of 1999-12-04 that was most stubs). */
1401 this->remote_packet_size
= 400 - 1;
1403 /* This one is filled in when a ``g'' packet is received. */
1404 this->actual_register_packet_size
= 0;
1406 /* Should rsa->sizeof_g_packet needs more space than the
1407 default, adjust the size accordingly. Remember that each byte is
1408 encoded as two characters. 32 is the overhead for the packet
1409 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
1410 (``$NN:G...#NN'') is a better guess, the below has been padded a
1412 if (this->sizeof_g_packet
> ((this->remote_packet_size
- 32) / 2))
1413 this->remote_packet_size
= (this->sizeof_g_packet
* 2 + 32);
1416 /* Get a pointer to the current remote target. If not connected to a
1417 remote target, return NULL. */
1419 static remote_target
*
1420 get_current_remote_target ()
1422 target_ops
*proc_target
= find_target_at (process_stratum
);
1423 return dynamic_cast<remote_target
*> (proc_target
);
1426 /* Return the current allowed size of a remote packet. This is
1427 inferred from the current architecture, and should be used to
1428 limit the length of outgoing packets. */
1430 remote_target::get_remote_packet_size ()
1432 struct remote_state
*rs
= get_remote_state ();
1433 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1435 if (rs
->explicit_packet_size
)
1436 return rs
->explicit_packet_size
;
1438 return rsa
->remote_packet_size
;
1441 static struct packet_reg
*
1442 packet_reg_from_regnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1445 if (regnum
< 0 && regnum
>= gdbarch_num_regs (gdbarch
))
1449 struct packet_reg
*r
= &rsa
->regs
[regnum
];
1451 gdb_assert (r
->regnum
== regnum
);
1456 static struct packet_reg
*
1457 packet_reg_from_pnum (struct gdbarch
*gdbarch
, struct remote_arch_state
*rsa
,
1462 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
1464 struct packet_reg
*r
= &rsa
->regs
[i
];
1466 if (r
->pnum
== pnum
)
1472 /* Allow the user to specify what sequence to send to the remote
1473 when he requests a program interruption: Although ^C is usually
1474 what remote systems expect (this is the default, here), it is
1475 sometimes preferable to send a break. On other systems such
1476 as the Linux kernel, a break followed by g, which is Magic SysRq g
1477 is required in order to interrupt the execution. */
1478 const char interrupt_sequence_control_c
[] = "Ctrl-C";
1479 const char interrupt_sequence_break
[] = "BREAK";
1480 const char interrupt_sequence_break_g
[] = "BREAK-g";
1481 static const char *const interrupt_sequence_modes
[] =
1483 interrupt_sequence_control_c
,
1484 interrupt_sequence_break
,
1485 interrupt_sequence_break_g
,
1488 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
1491 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
1492 struct cmd_list_element
*c
,
1495 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
1496 fprintf_filtered (file
,
1497 _("Send the ASCII ETX character (Ctrl-c) "
1498 "to the remote target to interrupt the "
1499 "execution of the program.\n"));
1500 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
1501 fprintf_filtered (file
,
1502 _("send a break signal to the remote target "
1503 "to interrupt the execution of the program.\n"));
1504 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
1505 fprintf_filtered (file
,
1506 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
1507 "the remote target to interrupt the execution "
1508 "of Linux kernel.\n"));
1510 internal_error (__FILE__
, __LINE__
,
1511 _("Invalid value for interrupt_sequence_mode: %s."),
1512 interrupt_sequence_mode
);
1515 /* This boolean variable specifies whether interrupt_sequence is sent
1516 to the remote target when gdb connects to it.
1517 This is mostly needed when you debug the Linux kernel: The Linux kernel
1518 expects BREAK g which is Magic SysRq g for connecting gdb. */
1519 static int interrupt_on_connect
= 0;
1521 /* This variable is used to implement the "set/show remotebreak" commands.
1522 Since these commands are now deprecated in favor of "set/show remote
1523 interrupt-sequence", it no longer has any effect on the code. */
1524 static int remote_break
;
1527 set_remotebreak (const char *args
, int from_tty
, struct cmd_list_element
*c
)
1530 interrupt_sequence_mode
= interrupt_sequence_break
;
1532 interrupt_sequence_mode
= interrupt_sequence_control_c
;
1536 show_remotebreak (struct ui_file
*file
, int from_tty
,
1537 struct cmd_list_element
*c
,
1542 /* This variable sets the number of bits in an address that are to be
1543 sent in a memory ("M" or "m") packet. Normally, after stripping
1544 leading zeros, the entire address would be sent. This variable
1545 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1546 initial implementation of remote.c restricted the address sent in
1547 memory packets to ``host::sizeof long'' bytes - (typically 32
1548 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1549 address was never sent. Since fixing this bug may cause a break in
1550 some remote targets this variable is principly provided to
1551 facilitate backward compatibility. */
1553 static unsigned int remote_address_size
;
1556 /* User configurable variables for the number of characters in a
1557 memory read/write packet. MIN (rsa->remote_packet_size,
1558 rsa->sizeof_g_packet) is the default. Some targets need smaller
1559 values (fifo overruns, et.al.) and some users need larger values
1560 (speed up transfers). The variables ``preferred_*'' (the user
1561 request), ``current_*'' (what was actually set) and ``forced_*''
1562 (Positive - a soft limit, negative - a hard limit). */
1564 struct memory_packet_config
1571 /* The default max memory-write-packet-size, when the setting is
1572 "fixed". The 16k is historical. (It came from older GDB's using
1573 alloca for buffers and the knowledge (folklore?) that some hosts
1574 don't cope very well with large alloca calls.) */
1575 #define DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED 16384
1577 /* The minimum remote packet size for memory transfers. Ensures we
1578 can write at least one byte. */
1579 #define MIN_MEMORY_PACKET_SIZE 20
1581 /* Get the memory packet size, assuming it is fixed. */
1584 get_fixed_memory_packet_size (struct memory_packet_config
*config
)
1586 gdb_assert (config
->fixed_p
);
1588 if (config
->size
<= 0)
1589 return DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
;
1591 return config
->size
;
1594 /* Compute the current size of a read/write packet. Since this makes
1595 use of ``actual_register_packet_size'' the computation is dynamic. */
1598 remote_target::get_memory_packet_size (struct memory_packet_config
*config
)
1600 struct remote_state
*rs
= get_remote_state ();
1601 remote_arch_state
*rsa
= rs
->get_remote_arch_state (target_gdbarch ());
1604 if (config
->fixed_p
)
1605 what_they_get
= get_fixed_memory_packet_size (config
);
1608 what_they_get
= get_remote_packet_size ();
1609 /* Limit the packet to the size specified by the user. */
1610 if (config
->size
> 0
1611 && what_they_get
> config
->size
)
1612 what_they_get
= config
->size
;
1614 /* Limit it to the size of the targets ``g'' response unless we have
1615 permission from the stub to use a larger packet size. */
1616 if (rs
->explicit_packet_size
== 0
1617 && rsa
->actual_register_packet_size
> 0
1618 && what_they_get
> rsa
->actual_register_packet_size
)
1619 what_they_get
= rsa
->actual_register_packet_size
;
1621 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1622 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1624 /* Make sure there is room in the global buffer for this packet
1625 (including its trailing NUL byte). */
1626 if (rs
->buf_size
< what_they_get
+ 1)
1628 rs
->buf_size
= 2 * what_they_get
;
1629 rs
->buf
= (char *) xrealloc (rs
->buf
, 2 * what_they_get
);
1632 return what_they_get
;
1635 /* Update the size of a read/write packet. If they user wants
1636 something really big then do a sanity check. */
1639 set_memory_packet_size (const char *args
, struct memory_packet_config
*config
)
1641 int fixed_p
= config
->fixed_p
;
1642 long size
= config
->size
;
1645 error (_("Argument required (integer, `fixed' or `limited')."));
1646 else if (strcmp (args
, "hard") == 0
1647 || strcmp (args
, "fixed") == 0)
1649 else if (strcmp (args
, "soft") == 0
1650 || strcmp (args
, "limit") == 0)
1656 size
= strtoul (args
, &end
, 0);
1658 error (_("Invalid %s (bad syntax)."), config
->name
);
1660 /* Instead of explicitly capping the size of a packet to or
1661 disallowing it, the user is allowed to set the size to
1662 something arbitrarily large. */
1666 if (fixed_p
&& !config
->fixed_p
)
1668 /* So that the query shows the correct value. */
1669 long query_size
= (size
<= 0
1670 ? DEFAULT_MAX_MEMORY_PACKET_SIZE_FIXED
1673 if (! query (_("The target may not be able to correctly handle a %s\n"
1674 "of %ld bytes. Change the packet size? "),
1675 config
->name
, query_size
))
1676 error (_("Packet size not changed."));
1678 /* Update the config. */
1679 config
->fixed_p
= fixed_p
;
1680 config
->size
= size
;
1684 show_memory_packet_size (struct memory_packet_config
*config
)
1686 if (config
->size
== 0)
1687 printf_filtered (_("The %s is 0 (default). "), config
->name
);
1689 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1690 if (config
->fixed_p
)
1691 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1692 get_fixed_memory_packet_size (config
));
1695 remote_target
*remote
= get_current_remote_target ();
1698 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1699 remote
->get_memory_packet_size (config
));
1701 puts_filtered ("The actual limit will be further reduced "
1702 "dependent on the target.\n");
1706 static struct memory_packet_config memory_write_packet_config
=
1708 "memory-write-packet-size",
1712 set_memory_write_packet_size (const char *args
, int from_tty
)
1714 set_memory_packet_size (args
, &memory_write_packet_config
);
1718 show_memory_write_packet_size (const char *args
, int from_tty
)
1720 show_memory_packet_size (&memory_write_packet_config
);
1723 /* Show the number of hardware watchpoints that can be used. */
1726 show_hardware_watchpoint_limit (struct ui_file
*file
, int from_tty
,
1727 struct cmd_list_element
*c
,
1730 fprintf_filtered (file
, _("The maximum number of target hardware "
1731 "watchpoints is %s.\n"), value
);
1734 /* Show the length limit (in bytes) for hardware watchpoints. */
1737 show_hardware_watchpoint_length_limit (struct ui_file
*file
, int from_tty
,
1738 struct cmd_list_element
*c
,
1741 fprintf_filtered (file
, _("The maximum length (in bytes) of a target "
1742 "hardware watchpoint is %s.\n"), value
);
1745 /* Show the number of hardware breakpoints that can be used. */
1748 show_hardware_breakpoint_limit (struct ui_file
*file
, int from_tty
,
1749 struct cmd_list_element
*c
,
1752 fprintf_filtered (file
, _("The maximum number of target hardware "
1753 "breakpoints is %s.\n"), value
);
1757 remote_target::get_memory_write_packet_size ()
1759 return get_memory_packet_size (&memory_write_packet_config
);
1762 static struct memory_packet_config memory_read_packet_config
=
1764 "memory-read-packet-size",
1768 set_memory_read_packet_size (const char *args
, int from_tty
)
1770 set_memory_packet_size (args
, &memory_read_packet_config
);
1774 show_memory_read_packet_size (const char *args
, int from_tty
)
1776 show_memory_packet_size (&memory_read_packet_config
);
1780 remote_target::get_memory_read_packet_size ()
1782 long size
= get_memory_packet_size (&memory_read_packet_config
);
1784 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1785 extra buffer size argument before the memory read size can be
1786 increased beyond this. */
1787 if (size
> get_remote_packet_size ())
1788 size
= get_remote_packet_size ();
1794 struct packet_config
1799 /* If auto, GDB auto-detects support for this packet or feature,
1800 either through qSupported, or by trying the packet and looking
1801 at the response. If true, GDB assumes the target supports this
1802 packet. If false, the packet is disabled. Configs that don't
1803 have an associated command always have this set to auto. */
1804 enum auto_boolean detect
;
1806 /* Does the target support this packet? */
1807 enum packet_support support
;
1810 static enum packet_support
packet_config_support (struct packet_config
*config
);
1811 static enum packet_support
packet_support (int packet
);
1814 show_packet_config_cmd (struct packet_config
*config
)
1816 const char *support
= "internal-error";
1818 switch (packet_config_support (config
))
1821 support
= "enabled";
1823 case PACKET_DISABLE
:
1824 support
= "disabled";
1826 case PACKET_SUPPORT_UNKNOWN
:
1827 support
= "unknown";
1830 switch (config
->detect
)
1832 case AUTO_BOOLEAN_AUTO
:
1833 printf_filtered (_("Support for the `%s' packet "
1834 "is auto-detected, currently %s.\n"),
1835 config
->name
, support
);
1837 case AUTO_BOOLEAN_TRUE
:
1838 case AUTO_BOOLEAN_FALSE
:
1839 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1840 config
->name
, support
);
1846 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1847 const char *title
, int legacy
)
1853 config
->name
= name
;
1854 config
->title
= title
;
1855 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1857 show_doc
= xstrprintf ("Show current use of remote "
1858 "protocol `%s' (%s) packet",
1860 /* set/show TITLE-packet {auto,on,off} */
1861 cmd_name
= xstrprintf ("%s-packet", title
);
1862 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1863 &config
->detect
, set_doc
,
1864 show_doc
, NULL
, /* help_doc */
1866 show_remote_protocol_packet_cmd
,
1867 &remote_set_cmdlist
, &remote_show_cmdlist
);
1868 /* The command code copies the documentation strings. */
1871 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1876 legacy_name
= xstrprintf ("%s-packet", name
);
1877 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1878 &remote_set_cmdlist
);
1879 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1880 &remote_show_cmdlist
);
1884 static enum packet_result
1885 packet_check_result (const char *buf
)
1889 /* The stub recognized the packet request. Check that the
1890 operation succeeded. */
1892 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1894 /* "Enn" - definitly an error. */
1895 return PACKET_ERROR
;
1897 /* Always treat "E." as an error. This will be used for
1898 more verbose error messages, such as E.memtypes. */
1899 if (buf
[0] == 'E' && buf
[1] == '.')
1900 return PACKET_ERROR
;
1902 /* The packet may or may not be OK. Just assume it is. */
1906 /* The stub does not support the packet. */
1907 return PACKET_UNKNOWN
;
1910 static enum packet_result
1911 packet_ok (const char *buf
, struct packet_config
*config
)
1913 enum packet_result result
;
1915 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1916 && config
->support
== PACKET_DISABLE
)
1917 internal_error (__FILE__
, __LINE__
,
1918 _("packet_ok: attempt to use a disabled packet"));
1920 result
= packet_check_result (buf
);
1925 /* The stub recognized the packet request. */
1926 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1929 fprintf_unfiltered (gdb_stdlog
,
1930 "Packet %s (%s) is supported\n",
1931 config
->name
, config
->title
);
1932 config
->support
= PACKET_ENABLE
;
1935 case PACKET_UNKNOWN
:
1936 /* The stub does not support the packet. */
1937 if (config
->detect
== AUTO_BOOLEAN_AUTO
1938 && config
->support
== PACKET_ENABLE
)
1940 /* If the stub previously indicated that the packet was
1941 supported then there is a protocol error. */
1942 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1943 config
->name
, config
->title
);
1945 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1947 /* The user set it wrong. */
1948 error (_("Enabled packet %s (%s) not recognized by stub"),
1949 config
->name
, config
->title
);
1953 fprintf_unfiltered (gdb_stdlog
,
1954 "Packet %s (%s) is NOT supported\n",
1955 config
->name
, config
->title
);
1956 config
->support
= PACKET_DISABLE
;
1977 PACKET_vFile_pwrite
,
1979 PACKET_vFile_unlink
,
1980 PACKET_vFile_readlink
,
1983 PACKET_qXfer_features
,
1984 PACKET_qXfer_exec_file
,
1985 PACKET_qXfer_libraries
,
1986 PACKET_qXfer_libraries_svr4
,
1987 PACKET_qXfer_memory_map
,
1988 PACKET_qXfer_spu_read
,
1989 PACKET_qXfer_spu_write
,
1990 PACKET_qXfer_osdata
,
1991 PACKET_qXfer_threads
,
1992 PACKET_qXfer_statictrace_read
,
1993 PACKET_qXfer_traceframe_info
,
1999 PACKET_QPassSignals
,
2000 PACKET_QCatchSyscalls
,
2001 PACKET_QProgramSignals
,
2002 PACKET_QSetWorkingDir
,
2003 PACKET_QStartupWithShell
,
2004 PACKET_QEnvironmentHexEncoded
,
2005 PACKET_QEnvironmentReset
,
2006 PACKET_QEnvironmentUnset
,
2008 PACKET_qSearch_memory
,
2011 PACKET_QStartNoAckMode
,
2013 PACKET_qXfer_siginfo_read
,
2014 PACKET_qXfer_siginfo_write
,
2017 /* Support for conditional tracepoints. */
2018 PACKET_ConditionalTracepoints
,
2020 /* Support for target-side breakpoint conditions. */
2021 PACKET_ConditionalBreakpoints
,
2023 /* Support for target-side breakpoint commands. */
2024 PACKET_BreakpointCommands
,
2026 /* Support for fast tracepoints. */
2027 PACKET_FastTracepoints
,
2029 /* Support for static tracepoints. */
2030 PACKET_StaticTracepoints
,
2032 /* Support for installing tracepoints while a trace experiment is
2034 PACKET_InstallInTrace
,
2038 PACKET_TracepointSource
,
2041 PACKET_QDisableRandomization
,
2043 PACKET_QTBuffer_size
,
2047 PACKET_qXfer_btrace
,
2049 /* Support for the QNonStop packet. */
2052 /* Support for the QThreadEvents packet. */
2053 PACKET_QThreadEvents
,
2055 /* Support for multi-process extensions. */
2056 PACKET_multiprocess_feature
,
2058 /* Support for enabling and disabling tracepoints while a trace
2059 experiment is running. */
2060 PACKET_EnableDisableTracepoints_feature
,
2062 /* Support for collecting strings using the tracenz bytecode. */
2063 PACKET_tracenz_feature
,
2065 /* Support for continuing to run a trace experiment while GDB is
2067 PACKET_DisconnectedTracing_feature
,
2069 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
2070 PACKET_augmented_libraries_svr4_read_feature
,
2072 /* Support for the qXfer:btrace-conf:read packet. */
2073 PACKET_qXfer_btrace_conf
,
2075 /* Support for the Qbtrace-conf:bts:size packet. */
2076 PACKET_Qbtrace_conf_bts_size
,
2078 /* Support for swbreak+ feature. */
2079 PACKET_swbreak_feature
,
2081 /* Support for hwbreak+ feature. */
2082 PACKET_hwbreak_feature
,
2084 /* Support for fork events. */
2085 PACKET_fork_event_feature
,
2087 /* Support for vfork events. */
2088 PACKET_vfork_event_feature
,
2090 /* Support for the Qbtrace-conf:pt:size packet. */
2091 PACKET_Qbtrace_conf_pt_size
,
2093 /* Support for exec events. */
2094 PACKET_exec_event_feature
,
2096 /* Support for query supported vCont actions. */
2097 PACKET_vContSupported
,
2099 /* Support remote CTRL-C. */
2102 /* Support TARGET_WAITKIND_NO_RESUMED. */
2108 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
2110 /* Returns the packet's corresponding "set remote foo-packet" command
2111 state. See struct packet_config for more details. */
2113 static enum auto_boolean
2114 packet_set_cmd_state (int packet
)
2116 return remote_protocol_packets
[packet
].detect
;
2119 /* Returns whether a given packet or feature is supported. This takes
2120 into account the state of the corresponding "set remote foo-packet"
2121 command, which may be used to bypass auto-detection. */
2123 static enum packet_support
2124 packet_config_support (struct packet_config
*config
)
2126 switch (config
->detect
)
2128 case AUTO_BOOLEAN_TRUE
:
2129 return PACKET_ENABLE
;
2130 case AUTO_BOOLEAN_FALSE
:
2131 return PACKET_DISABLE
;
2132 case AUTO_BOOLEAN_AUTO
:
2133 return config
->support
;
2135 gdb_assert_not_reached (_("bad switch"));
2139 /* Same as packet_config_support, but takes the packet's enum value as
2142 static enum packet_support
2143 packet_support (int packet
)
2145 struct packet_config
*config
= &remote_protocol_packets
[packet
];
2147 return packet_config_support (config
);
2151 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
2152 struct cmd_list_element
*c
,
2155 struct packet_config
*packet
;
2157 for (packet
= remote_protocol_packets
;
2158 packet
< &remote_protocol_packets
[PACKET_MAX
];
2161 if (&packet
->detect
== c
->var
)
2163 show_packet_config_cmd (packet
);
2167 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
2171 /* Should we try one of the 'Z' requests? */
2175 Z_PACKET_SOFTWARE_BP
,
2176 Z_PACKET_HARDWARE_BP
,
2183 /* For compatibility with older distributions. Provide a ``set remote
2184 Z-packet ...'' command that updates all the Z packet types. */
2186 static enum auto_boolean remote_Z_packet_detect
;
2189 set_remote_protocol_Z_packet_cmd (const char *args
, int from_tty
,
2190 struct cmd_list_element
*c
)
2194 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2195 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
2199 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
2200 struct cmd_list_element
*c
,
2205 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
2207 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
2211 /* Returns true if the multi-process extensions are in effect. */
2214 remote_multi_process_p (struct remote_state
*rs
)
2216 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
2219 /* Returns true if fork events are supported. */
2222 remote_fork_event_p (struct remote_state
*rs
)
2224 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
2227 /* Returns true if vfork events are supported. */
2230 remote_vfork_event_p (struct remote_state
*rs
)
2232 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
2235 /* Returns true if exec events are supported. */
2238 remote_exec_event_p (struct remote_state
*rs
)
2240 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
2243 /* Insert fork catchpoint target routine. If fork events are enabled
2244 then return success, nothing more to do. */
2247 remote_target::insert_fork_catchpoint (int pid
)
2249 struct remote_state
*rs
= get_remote_state ();
2251 return !remote_fork_event_p (rs
);
2254 /* Remove fork catchpoint target routine. Nothing to do, just
2258 remote_target::remove_fork_catchpoint (int pid
)
2263 /* Insert vfork catchpoint target routine. If vfork events are enabled
2264 then return success, nothing more to do. */
2267 remote_target::insert_vfork_catchpoint (int pid
)
2269 struct remote_state
*rs
= get_remote_state ();
2271 return !remote_vfork_event_p (rs
);
2274 /* Remove vfork catchpoint target routine. Nothing to do, just
2278 remote_target::remove_vfork_catchpoint (int pid
)
2283 /* Insert exec catchpoint target routine. If exec events are
2284 enabled, just return success. */
2287 remote_target::insert_exec_catchpoint (int pid
)
2289 struct remote_state
*rs
= get_remote_state ();
2291 return !remote_exec_event_p (rs
);
2294 /* Remove exec catchpoint target routine. Nothing to do, just
2298 remote_target::remove_exec_catchpoint (int pid
)
2305 static ptid_t magic_null_ptid
;
2306 static ptid_t not_sent_ptid
;
2307 static ptid_t any_thread_ptid
;
2309 /* Find out if the stub attached to PID (and hence GDB should offer to
2310 detach instead of killing it when bailing out). */
2313 remote_target::remote_query_attached (int pid
)
2315 struct remote_state
*rs
= get_remote_state ();
2316 size_t size
= get_remote_packet_size ();
2318 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
2321 if (remote_multi_process_p (rs
))
2322 xsnprintf (rs
->buf
, size
, "qAttached:%x", pid
);
2324 xsnprintf (rs
->buf
, size
, "qAttached");
2327 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2329 switch (packet_ok (rs
->buf
,
2330 &remote_protocol_packets
[PACKET_qAttached
]))
2333 if (strcmp (rs
->buf
, "1") == 0)
2337 warning (_("Remote failure reply: %s"), rs
->buf
);
2339 case PACKET_UNKNOWN
:
2346 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
2347 has been invented by GDB, instead of reported by the target. Since
2348 we can be connected to a remote system before before knowing about
2349 any inferior, mark the target with execution when we find the first
2350 inferior. If ATTACHED is 1, then we had just attached to this
2351 inferior. If it is 0, then we just created this inferior. If it
2352 is -1, then try querying the remote stub to find out if it had
2353 attached to the inferior or not. If TRY_OPEN_EXEC is true then
2354 attempt to open this inferior's executable as the main executable
2355 if no main executable is open already. */
2358 remote_target::remote_add_inferior (int fake_pid_p
, int pid
, int attached
,
2361 struct inferior
*inf
;
2363 /* Check whether this process we're learning about is to be
2364 considered attached, or if is to be considered to have been
2365 spawned by the stub. */
2367 attached
= remote_query_attached (pid
);
2369 if (gdbarch_has_global_solist (target_gdbarch ()))
2371 /* If the target shares code across all inferiors, then every
2372 attach adds a new inferior. */
2373 inf
= add_inferior (pid
);
2375 /* ... and every inferior is bound to the same program space.
2376 However, each inferior may still have its own address
2378 inf
->aspace
= maybe_new_address_space ();
2379 inf
->pspace
= current_program_space
;
2383 /* In the traditional debugging scenario, there's a 1-1 match
2384 between program/address spaces. We simply bind the inferior
2385 to the program space's address space. */
2386 inf
= current_inferior ();
2387 inferior_appeared (inf
, pid
);
2390 inf
->attach_flag
= attached
;
2391 inf
->fake_pid_p
= fake_pid_p
;
2393 /* If no main executable is currently open then attempt to
2394 open the file that was executed to create this inferior. */
2395 if (try_open_exec
&& get_exec_file (0) == NULL
)
2396 exec_file_locate_attach (pid
, 0, 1);
2401 static remote_thread_info
*get_remote_thread_info (thread_info
*thread
);
2402 static remote_thread_info
*get_remote_thread_info (ptid_t ptid
);
2404 /* Add thread PTID to GDB's thread list. Tag it as executing/running
2405 according to RUNNING. */
2408 remote_target::remote_add_thread (ptid_t ptid
, bool running
, bool executing
)
2410 struct remote_state
*rs
= get_remote_state ();
2411 struct thread_info
*thread
;
2413 /* GDB historically didn't pull threads in the initial connection
2414 setup. If the remote target doesn't even have a concept of
2415 threads (e.g., a bare-metal target), even if internally we
2416 consider that a single-threaded target, mentioning a new thread
2417 might be confusing to the user. Be silent then, preserving the
2418 age old behavior. */
2419 if (rs
->starting_up
)
2420 thread
= add_thread_silent (ptid
);
2422 thread
= add_thread (ptid
);
2424 get_remote_thread_info (thread
)->vcont_resumed
= executing
;
2425 set_executing (ptid
, executing
);
2426 set_running (ptid
, running
);
2431 /* Come here when we learn about a thread id from the remote target.
2432 It may be the first time we hear about such thread, so take the
2433 opportunity to add it to GDB's thread list. In case this is the
2434 first time we're noticing its corresponding inferior, add it to
2435 GDB's inferior list as well. EXECUTING indicates whether the
2436 thread is (internally) executing or stopped. */
2439 remote_target::remote_notice_new_inferior (ptid_t currthread
, int executing
)
2441 /* In non-stop mode, we assume new found threads are (externally)
2442 running until proven otherwise with a stop reply. In all-stop,
2443 we can only get here if all threads are stopped. */
2444 int running
= target_is_non_stop_p () ? 1 : 0;
2446 /* If this is a new thread, add it to GDB's thread list.
2447 If we leave it up to WFI to do this, bad things will happen. */
2449 thread_info
*tp
= find_thread_ptid (currthread
);
2450 if (tp
!= NULL
&& tp
->state
== THREAD_EXITED
)
2452 /* We're seeing an event on a thread id we knew had exited.
2453 This has to be a new thread reusing the old id. Add it. */
2454 remote_add_thread (currthread
, running
, executing
);
2458 if (!in_thread_list (currthread
))
2460 struct inferior
*inf
= NULL
;
2461 int pid
= currthread
.pid ();
2463 if (inferior_ptid
.is_pid ()
2464 && pid
== inferior_ptid
.pid ())
2466 /* inferior_ptid has no thread member yet. This can happen
2467 with the vAttach -> remote_wait,"TAAthread:" path if the
2468 stub doesn't support qC. This is the first stop reported
2469 after an attach, so this is the main thread. Update the
2470 ptid in the thread list. */
2471 if (in_thread_list (ptid_t (pid
)))
2472 thread_change_ptid (inferior_ptid
, currthread
);
2475 remote_add_thread (currthread
, running
, executing
);
2476 inferior_ptid
= currthread
;
2481 if (magic_null_ptid
== inferior_ptid
)
2483 /* inferior_ptid is not set yet. This can happen with the
2484 vRun -> remote_wait,"TAAthread:" path if the stub
2485 doesn't support qC. This is the first stop reported
2486 after an attach, so this is the main thread. Update the
2487 ptid in the thread list. */
2488 thread_change_ptid (inferior_ptid
, currthread
);
2492 /* When connecting to a target remote, or to a target
2493 extended-remote which already was debugging an inferior, we
2494 may not know about it yet. Add it before adding its child
2495 thread, so notifications are emitted in a sensible order. */
2496 if (find_inferior_pid (currthread
.pid ()) == NULL
)
2498 struct remote_state
*rs
= get_remote_state ();
2499 int fake_pid_p
= !remote_multi_process_p (rs
);
2501 inf
= remote_add_inferior (fake_pid_p
,
2502 currthread
.pid (), -1, 1);
2505 /* This is really a new thread. Add it. */
2506 thread_info
*new_thr
2507 = remote_add_thread (currthread
, running
, executing
);
2509 /* If we found a new inferior, let the common code do whatever
2510 it needs to with it (e.g., read shared libraries, insert
2511 breakpoints), unless we're just setting up an all-stop
2515 struct remote_state
*rs
= get_remote_state ();
2517 if (!rs
->starting_up
)
2518 notice_new_inferior (new_thr
, executing
, 0);
2523 /* Return THREAD's private thread data, creating it if necessary. */
2525 static remote_thread_info
*
2526 get_remote_thread_info (thread_info
*thread
)
2528 gdb_assert (thread
!= NULL
);
2530 if (thread
->priv
== NULL
)
2531 thread
->priv
.reset (new remote_thread_info
);
2533 return static_cast<remote_thread_info
*> (thread
->priv
.get ());
2536 static remote_thread_info
*
2537 get_remote_thread_info (ptid_t ptid
)
2539 thread_info
*thr
= find_thread_ptid (ptid
);
2540 return get_remote_thread_info (thr
);
2543 /* Call this function as a result of
2544 1) A halt indication (T packet) containing a thread id
2545 2) A direct query of currthread
2546 3) Successful execution of set thread */
2549 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
2551 rs
->general_thread
= currthread
;
2554 /* If 'QPassSignals' is supported, tell the remote stub what signals
2555 it can simply pass through to the inferior without reporting. */
2558 remote_target::pass_signals (int numsigs
, unsigned char *pass_signals
)
2560 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2562 char *pass_packet
, *p
;
2564 struct remote_state
*rs
= get_remote_state ();
2566 gdb_assert (numsigs
< 256);
2567 for (i
= 0; i
< numsigs
; i
++)
2569 if (pass_signals
[i
])
2572 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2573 strcpy (pass_packet
, "QPassSignals:");
2574 p
= pass_packet
+ strlen (pass_packet
);
2575 for (i
= 0; i
< numsigs
; i
++)
2577 if (pass_signals
[i
])
2580 *p
++ = tohex (i
>> 4);
2581 *p
++ = tohex (i
& 15);
2590 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2592 putpkt (pass_packet
);
2593 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2594 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2595 if (rs
->last_pass_packet
)
2596 xfree (rs
->last_pass_packet
);
2597 rs
->last_pass_packet
= pass_packet
;
2600 xfree (pass_packet
);
2604 /* If 'QCatchSyscalls' is supported, tell the remote stub
2605 to report syscalls to GDB. */
2608 remote_target::set_syscall_catchpoint (int pid
, bool needed
, int any_count
,
2609 gdb::array_view
<const int> syscall_counts
)
2611 const char *catch_packet
;
2612 enum packet_result result
;
2615 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2617 /* Not supported. */
2621 if (needed
&& any_count
== 0)
2623 /* Count how many syscalls are to be caught. */
2624 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2626 if (syscall_counts
[i
] != 0)
2633 fprintf_unfiltered (gdb_stdlog
,
2634 "remote_set_syscall_catchpoint "
2635 "pid %d needed %d any_count %d n_sysno %d\n",
2636 pid
, needed
, any_count
, n_sysno
);
2639 std::string built_packet
;
2642 /* Prepare a packet with the sysno list, assuming max 8+1
2643 characters for a sysno. If the resulting packet size is too
2644 big, fallback on the non-selective packet. */
2645 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2646 built_packet
.reserve (maxpktsz
);
2647 built_packet
= "QCatchSyscalls:1";
2650 /* Add in each syscall to be caught. */
2651 for (size_t i
= 0; i
< syscall_counts
.size (); i
++)
2653 if (syscall_counts
[i
] != 0)
2654 string_appendf (built_packet
, ";%zx", i
);
2657 if (built_packet
.size () > get_remote_packet_size ())
2659 /* catch_packet too big. Fallback to less efficient
2660 non selective mode, with GDB doing the filtering. */
2661 catch_packet
= "QCatchSyscalls:1";
2664 catch_packet
= built_packet
.c_str ();
2667 catch_packet
= "QCatchSyscalls:0";
2669 struct remote_state
*rs
= get_remote_state ();
2671 putpkt (catch_packet
);
2672 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2673 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2674 if (result
== PACKET_OK
)
2680 /* If 'QProgramSignals' is supported, tell the remote stub what
2681 signals it should pass through to the inferior when detaching. */
2684 remote_target::program_signals (int numsigs
, unsigned char *signals
)
2686 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2690 struct remote_state
*rs
= get_remote_state ();
2692 gdb_assert (numsigs
< 256);
2693 for (i
= 0; i
< numsigs
; i
++)
2698 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2699 strcpy (packet
, "QProgramSignals:");
2700 p
= packet
+ strlen (packet
);
2701 for (i
= 0; i
< numsigs
; i
++)
2703 if (signal_pass_state (i
))
2706 *p
++ = tohex (i
>> 4);
2707 *p
++ = tohex (i
& 15);
2716 if (!rs
->last_program_signals_packet
2717 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2720 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2721 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2722 xfree (rs
->last_program_signals_packet
);
2723 rs
->last_program_signals_packet
= packet
;
2730 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2731 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2732 thread. If GEN is set, set the general thread, if not, then set
2733 the step/continue thread. */
2735 remote_target::set_thread (ptid_t ptid
, int gen
)
2737 struct remote_state
*rs
= get_remote_state ();
2738 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2739 char *buf
= rs
->buf
;
2740 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
2746 *buf
++ = gen
? 'g' : 'c';
2747 if (ptid
== magic_null_ptid
)
2748 xsnprintf (buf
, endbuf
- buf
, "0");
2749 else if (ptid
== any_thread_ptid
)
2750 xsnprintf (buf
, endbuf
- buf
, "0");
2751 else if (ptid
== minus_one_ptid
)
2752 xsnprintf (buf
, endbuf
- buf
, "-1");
2754 write_ptid (buf
, endbuf
, ptid
);
2756 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2758 rs
->general_thread
= ptid
;
2760 rs
->continue_thread
= ptid
;
2764 remote_target::set_general_thread (ptid_t ptid
)
2766 set_thread (ptid
, 1);
2770 remote_target::set_continue_thread (ptid_t ptid
)
2772 set_thread (ptid
, 0);
2775 /* Change the remote current process. Which thread within the process
2776 ends up selected isn't important, as long as it is the same process
2777 as what INFERIOR_PTID points to.
2779 This comes from that fact that there is no explicit notion of
2780 "selected process" in the protocol. The selected process for
2781 general operations is the process the selected general thread
2785 remote_target::set_general_process ()
2787 struct remote_state
*rs
= get_remote_state ();
2789 /* If the remote can't handle multiple processes, don't bother. */
2790 if (!remote_multi_process_p (rs
))
2793 /* We only need to change the remote current thread if it's pointing
2794 at some other process. */
2795 if (rs
->general_thread
.pid () != inferior_ptid
.pid ())
2796 set_general_thread (inferior_ptid
);
2800 /* Return nonzero if this is the main thread that we made up ourselves
2801 to model non-threaded targets as single-threaded. */
2804 remote_thread_always_alive (ptid_t ptid
)
2806 if (ptid
== magic_null_ptid
)
2807 /* The main thread is always alive. */
2810 if (ptid
.pid () != 0 && ptid
.lwp () == 0)
2811 /* The main thread is always alive. This can happen after a
2812 vAttach, if the remote side doesn't support
2819 /* Return nonzero if the thread PTID is still alive on the remote
2823 remote_target::thread_alive (ptid_t ptid
)
2825 struct remote_state
*rs
= get_remote_state ();
2828 /* Check if this is a thread that we made up ourselves to model
2829 non-threaded targets as single-threaded. */
2830 if (remote_thread_always_alive (ptid
))
2834 endp
= rs
->buf
+ get_remote_packet_size ();
2837 write_ptid (p
, endp
, ptid
);
2840 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2841 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2844 /* Return a pointer to a thread name if we know it and NULL otherwise.
2845 The thread_info object owns the memory for the name. */
2848 remote_target::thread_name (struct thread_info
*info
)
2850 if (info
->priv
!= NULL
)
2852 const std::string
&name
= get_remote_thread_info (info
)->name
;
2853 return !name
.empty () ? name
.c_str () : NULL
;
2859 /* About these extended threadlist and threadinfo packets. They are
2860 variable length packets but, the fields within them are often fixed
2861 length. They are redundent enough to send over UDP as is the
2862 remote protocol in general. There is a matching unit test module
2865 /* WARNING: This threadref data structure comes from the remote O.S.,
2866 libstub protocol encoding, and remote.c. It is not particularly
2869 /* Right now, the internal structure is int. We want it to be bigger.
2870 Plan to fix this. */
2872 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2874 /* gdb_ext_thread_info is an internal GDB data structure which is
2875 equivalent to the reply of the remote threadinfo packet. */
2877 struct gdb_ext_thread_info
2879 threadref threadid
; /* External form of thread reference. */
2880 int active
; /* Has state interesting to GDB?
2882 char display
[256]; /* Brief state display, name,
2883 blocked/suspended. */
2884 char shortname
[32]; /* To be used to name threads. */
2885 char more_display
[256]; /* Long info, statistics, queue depth,
2889 /* The volume of remote transfers can be limited by submitting
2890 a mask containing bits specifying the desired information.
2891 Use a union of these values as the 'selection' parameter to
2892 get_thread_info. FIXME: Make these TAG names more thread specific. */
2894 #define TAG_THREADID 1
2895 #define TAG_EXISTS 2
2896 #define TAG_DISPLAY 4
2897 #define TAG_THREADNAME 8
2898 #define TAG_MOREDISPLAY 16
2900 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2902 static char *unpack_nibble (char *buf
, int *val
);
2904 static char *unpack_byte (char *buf
, int *value
);
2906 static char *pack_int (char *buf
, int value
);
2908 static char *unpack_int (char *buf
, int *value
);
2910 static char *unpack_string (char *src
, char *dest
, int length
);
2912 static char *pack_threadid (char *pkt
, threadref
*id
);
2914 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2916 void int_to_threadref (threadref
*id
, int value
);
2918 static int threadref_to_int (threadref
*ref
);
2920 static void copy_threadref (threadref
*dest
, threadref
*src
);
2922 static int threadmatch (threadref
*dest
, threadref
*src
);
2924 static char *pack_threadinfo_request (char *pkt
, int mode
,
2927 static char *pack_threadlist_request (char *pkt
, int startflag
,
2929 threadref
*nextthread
);
2931 static int remote_newthread_step (threadref
*ref
, void *context
);
2934 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2935 buffer we're allowed to write to. Returns
2936 BUF+CHARACTERS_WRITTEN. */
2939 remote_target::write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2942 struct remote_state
*rs
= get_remote_state ();
2944 if (remote_multi_process_p (rs
))
2948 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2950 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2954 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2956 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2961 /* Extract a PTID from BUF. If non-null, OBUF is set to one past the
2962 last parsed char. Returns null_ptid if no thread id is found, and
2963 throws an error if the thread id has an invalid format. */
2966 read_ptid (const char *buf
, const char **obuf
)
2968 const char *p
= buf
;
2970 ULONGEST pid
= 0, tid
= 0;
2974 /* Multi-process ptid. */
2975 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2977 error (_("invalid remote ptid: %s"), p
);
2980 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2983 return ptid_t (pid
, tid
, 0);
2986 /* No multi-process. Just a tid. */
2987 pp
= unpack_varlen_hex (p
, &tid
);
2989 /* Return null_ptid when no thread id is found. */
2997 /* Since the stub is not sending a process id, then default to
2998 what's in inferior_ptid, unless it's null at this point. If so,
2999 then since there's no way to know the pid of the reported
3000 threads, use the magic number. */
3001 if (inferior_ptid
== null_ptid
)
3002 pid
= magic_null_ptid
.pid ();
3004 pid
= inferior_ptid
.pid ();
3008 return ptid_t (pid
, tid
, 0);
3014 if (ch
>= 'a' && ch
<= 'f')
3015 return ch
- 'a' + 10;
3016 if (ch
>= '0' && ch
<= '9')
3018 if (ch
>= 'A' && ch
<= 'F')
3019 return ch
- 'A' + 10;
3024 stub_unpack_int (char *buff
, int fieldlength
)
3031 nibble
= stubhex (*buff
++);
3035 retval
= retval
<< 4;
3041 unpack_nibble (char *buf
, int *val
)
3043 *val
= fromhex (*buf
++);
3048 unpack_byte (char *buf
, int *value
)
3050 *value
= stub_unpack_int (buf
, 2);
3055 pack_int (char *buf
, int value
)
3057 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
3058 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
3059 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
3060 buf
= pack_hex_byte (buf
, (value
& 0xff));
3065 unpack_int (char *buf
, int *value
)
3067 *value
= stub_unpack_int (buf
, 8);
3071 #if 0 /* Currently unused, uncomment when needed. */
3072 static char *pack_string (char *pkt
, char *string
);
3075 pack_string (char *pkt
, char *string
)
3080 len
= strlen (string
);
3082 len
= 200; /* Bigger than most GDB packets, junk??? */
3083 pkt
= pack_hex_byte (pkt
, len
);
3087 if ((ch
== '\0') || (ch
== '#'))
3088 ch
= '*'; /* Protect encapsulation. */
3093 #endif /* 0 (unused) */
3096 unpack_string (char *src
, char *dest
, int length
)
3105 pack_threadid (char *pkt
, threadref
*id
)
3108 unsigned char *altid
;
3110 altid
= (unsigned char *) id
;
3111 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
3113 pkt
= pack_hex_byte (pkt
, *altid
++);
3119 unpack_threadid (char *inbuf
, threadref
*id
)
3122 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
3125 altref
= (char *) id
;
3127 while (inbuf
< limit
)
3129 x
= stubhex (*inbuf
++);
3130 y
= stubhex (*inbuf
++);
3131 *altref
++ = (x
<< 4) | y
;
3136 /* Externally, threadrefs are 64 bits but internally, they are still
3137 ints. This is due to a mismatch of specifications. We would like
3138 to use 64bit thread references internally. This is an adapter
3142 int_to_threadref (threadref
*id
, int value
)
3144 unsigned char *scan
;
3146 scan
= (unsigned char *) id
;
3152 *scan
++ = (value
>> 24) & 0xff;
3153 *scan
++ = (value
>> 16) & 0xff;
3154 *scan
++ = (value
>> 8) & 0xff;
3155 *scan
++ = (value
& 0xff);
3159 threadref_to_int (threadref
*ref
)
3162 unsigned char *scan
;
3168 value
= (value
<< 8) | ((*scan
++) & 0xff);
3173 copy_threadref (threadref
*dest
, threadref
*src
)
3176 unsigned char *csrc
, *cdest
;
3178 csrc
= (unsigned char *) src
;
3179 cdest
= (unsigned char *) dest
;
3186 threadmatch (threadref
*dest
, threadref
*src
)
3188 /* Things are broken right now, so just assume we got a match. */
3190 unsigned char *srcp
, *destp
;
3192 srcp
= (char *) src
;
3193 destp
= (char *) dest
;
3197 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
3204 threadid:1, # always request threadid
3211 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
3214 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
3216 *pkt
++ = 'q'; /* Info Query */
3217 *pkt
++ = 'P'; /* process or thread info */
3218 pkt
= pack_int (pkt
, mode
); /* mode */
3219 pkt
= pack_threadid (pkt
, id
); /* threadid */
3220 *pkt
= '\0'; /* terminate */
3224 /* These values tag the fields in a thread info response packet. */
3225 /* Tagging the fields allows us to request specific fields and to
3226 add more fields as time goes by. */
3228 #define TAG_THREADID 1 /* Echo the thread identifier. */
3229 #define TAG_EXISTS 2 /* Is this process defined enough to
3230 fetch registers and its stack? */
3231 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
3232 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
3233 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
3237 remote_target::remote_unpack_thread_info_response (char *pkt
,
3238 threadref
*expectedref
,
3239 gdb_ext_thread_info
*info
)
3241 struct remote_state
*rs
= get_remote_state ();
3245 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
3248 /* info->threadid = 0; FIXME: implement zero_threadref. */
3250 info
->display
[0] = '\0';
3251 info
->shortname
[0] = '\0';
3252 info
->more_display
[0] = '\0';
3254 /* Assume the characters indicating the packet type have been
3256 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
3257 pkt
= unpack_threadid (pkt
, &ref
);
3260 warning (_("Incomplete response to threadinfo request."));
3261 if (!threadmatch (&ref
, expectedref
))
3262 { /* This is an answer to a different request. */
3263 warning (_("ERROR RMT Thread info mismatch."));
3266 copy_threadref (&info
->threadid
, &ref
);
3268 /* Loop on tagged fields , try to bail if somthing goes wrong. */
3270 /* Packets are terminated with nulls. */
3271 while ((pkt
< limit
) && mask
&& *pkt
)
3273 pkt
= unpack_int (pkt
, &tag
); /* tag */
3274 pkt
= unpack_byte (pkt
, &length
); /* length */
3275 if (!(tag
& mask
)) /* Tags out of synch with mask. */
3277 warning (_("ERROR RMT: threadinfo tag mismatch."));
3281 if (tag
== TAG_THREADID
)
3285 warning (_("ERROR RMT: length of threadid is not 16."));
3289 pkt
= unpack_threadid (pkt
, &ref
);
3290 mask
= mask
& ~TAG_THREADID
;
3293 if (tag
== TAG_EXISTS
)
3295 info
->active
= stub_unpack_int (pkt
, length
);
3297 mask
= mask
& ~(TAG_EXISTS
);
3300 warning (_("ERROR RMT: 'exists' length too long."));
3306 if (tag
== TAG_THREADNAME
)
3308 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
3309 mask
= mask
& ~TAG_THREADNAME
;
3312 if (tag
== TAG_DISPLAY
)
3314 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
3315 mask
= mask
& ~TAG_DISPLAY
;
3318 if (tag
== TAG_MOREDISPLAY
)
3320 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
3321 mask
= mask
& ~TAG_MOREDISPLAY
;
3324 warning (_("ERROR RMT: unknown thread info tag."));
3325 break; /* Not a tag we know about. */
3331 remote_target::remote_get_threadinfo (threadref
*threadid
,
3333 gdb_ext_thread_info
*info
)
3335 struct remote_state
*rs
= get_remote_state ();
3338 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
3340 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3342 if (rs
->buf
[0] == '\0')
3345 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
3350 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
3353 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
3354 threadref
*nextthread
)
3356 *pkt
++ = 'q'; /* info query packet */
3357 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
3358 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
3359 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
3360 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
3365 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
3368 remote_target::parse_threadlist_response (char *pkt
, int result_limit
,
3369 threadref
*original_echo
,
3370 threadref
*resultlist
,
3373 struct remote_state
*rs
= get_remote_state ();
3375 int count
, resultcount
, done
;
3378 /* Assume the 'q' and 'M chars have been stripped. */
3379 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
3380 /* done parse past here */
3381 pkt
= unpack_byte (pkt
, &count
); /* count field */
3382 pkt
= unpack_nibble (pkt
, &done
);
3383 /* The first threadid is the argument threadid. */
3384 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
3385 while ((count
-- > 0) && (pkt
< limit
))
3387 pkt
= unpack_threadid (pkt
, resultlist
++);
3388 if (resultcount
++ >= result_limit
)
3396 /* Fetch the next batch of threads from the remote. Returns -1 if the
3397 qL packet is not supported, 0 on error and 1 on success. */
3400 remote_target::remote_get_threadlist (int startflag
, threadref
*nextthread
,
3401 int result_limit
, int *done
, int *result_count
,
3402 threadref
*threadlist
)
3404 struct remote_state
*rs
= get_remote_state ();
3407 /* Trancate result limit to be smaller than the packet size. */
3408 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
3409 >= get_remote_packet_size ())
3410 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
3412 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
3414 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3415 if (*rs
->buf
== '\0')
3417 /* Packet not supported. */
3422 parse_threadlist_response (rs
->buf
+ 2, result_limit
,
3423 &rs
->echo_nextthread
, threadlist
, done
);
3425 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
3427 /* FIXME: This is a good reason to drop the packet. */
3428 /* Possably, there is a duplicate response. */
3430 retransmit immediatly - race conditions
3431 retransmit after timeout - yes
3433 wait for packet, then exit
3435 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
3436 return 0; /* I choose simply exiting. */
3438 if (*result_count
<= 0)
3442 warning (_("RMT ERROR : failed to get remote thread list."));
3445 return result
; /* break; */
3447 if (*result_count
> result_limit
)
3450 warning (_("RMT ERROR: threadlist response longer than requested."));
3456 /* Fetch the list of remote threads, with the qL packet, and call
3457 STEPFUNCTION for each thread found. Stops iterating and returns 1
3458 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
3459 STEPFUNCTION returns false. If the packet is not supported,
3463 remote_target::remote_threadlist_iterator (rmt_thread_action stepfunction
,
3464 void *context
, int looplimit
)
3466 struct remote_state
*rs
= get_remote_state ();
3467 int done
, i
, result_count
;
3475 if (loopcount
++ > looplimit
)
3478 warning (_("Remote fetch threadlist -infinite loop-."));
3481 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
3482 MAXTHREADLISTRESULTS
,
3483 &done
, &result_count
,
3484 rs
->resultthreadlist
);
3487 /* Clear for later iterations. */
3489 /* Setup to resume next batch of thread references, set nextthread. */
3490 if (result_count
>= 1)
3491 copy_threadref (&rs
->nextthread
,
3492 &rs
->resultthreadlist
[result_count
- 1]);
3494 while (result_count
--)
3496 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
3506 /* A thread found on the remote target. */
3510 explicit thread_item (ptid_t ptid_
)
3514 thread_item (thread_item
&&other
) = default;
3515 thread_item
&operator= (thread_item
&&other
) = default;
3517 DISABLE_COPY_AND_ASSIGN (thread_item
);
3519 /* The thread's PTID. */
3522 /* The thread's extra info. */
3525 /* The thread's name. */
3528 /* The core the thread was running on. -1 if not known. */
3531 /* The thread handle associated with the thread. */
3532 gdb::byte_vector thread_handle
;
3535 /* Context passed around to the various methods listing remote
3536 threads. As new threads are found, they're added to the ITEMS
3539 struct threads_listing_context
3541 /* Return true if this object contains an entry for a thread with ptid
3544 bool contains_thread (ptid_t ptid
) const
3546 auto match_ptid
= [&] (const thread_item
&item
)
3548 return item
.ptid
== ptid
;
3551 auto it
= std::find_if (this->items
.begin (),
3555 return it
!= this->items
.end ();
3558 /* Remove the thread with ptid PTID. */
3560 void remove_thread (ptid_t ptid
)
3562 auto match_ptid
= [&] (const thread_item
&item
)
3564 return item
.ptid
== ptid
;
3567 auto it
= std::remove_if (this->items
.begin (),
3571 if (it
!= this->items
.end ())
3572 this->items
.erase (it
);
3575 /* The threads found on the remote target. */
3576 std::vector
<thread_item
> items
;
3580 remote_newthread_step (threadref
*ref
, void *data
)
3582 struct threads_listing_context
*context
3583 = (struct threads_listing_context
*) data
;
3584 int pid
= inferior_ptid
.pid ();
3585 int lwp
= threadref_to_int (ref
);
3586 ptid_t
ptid (pid
, lwp
);
3588 context
->items
.emplace_back (ptid
);
3590 return 1; /* continue iterator */
3593 #define CRAZY_MAX_THREADS 1000
3596 remote_target::remote_current_thread (ptid_t oldpid
)
3598 struct remote_state
*rs
= get_remote_state ();
3601 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3602 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3607 result
= read_ptid (&rs
->buf
[2], &obuf
);
3608 if (*obuf
!= '\0' && remote_debug
)
3609 fprintf_unfiltered (gdb_stdlog
,
3610 "warning: garbage in qC reply\n");
3618 /* List remote threads using the deprecated qL packet. */
3621 remote_target::remote_get_threads_with_ql (threads_listing_context
*context
)
3623 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3624 CRAZY_MAX_THREADS
) >= 0)
3630 #if defined(HAVE_LIBEXPAT)
3633 start_thread (struct gdb_xml_parser
*parser
,
3634 const struct gdb_xml_element
*element
,
3636 std::vector
<gdb_xml_value
> &attributes
)
3638 struct threads_listing_context
*data
3639 = (struct threads_listing_context
*) user_data
;
3640 struct gdb_xml_value
*attr
;
3642 char *id
= (char *) xml_find_attribute (attributes
, "id")->value
.get ();
3643 ptid_t ptid
= read_ptid (id
, NULL
);
3645 data
->items
.emplace_back (ptid
);
3646 thread_item
&item
= data
->items
.back ();
3648 attr
= xml_find_attribute (attributes
, "core");
3650 item
.core
= *(ULONGEST
*) attr
->value
.get ();
3652 attr
= xml_find_attribute (attributes
, "name");
3654 item
.name
= (const char *) attr
->value
.get ();
3656 attr
= xml_find_attribute (attributes
, "handle");
3658 item
.thread_handle
= hex2bin ((const char *) attr
->value
.get ());
3662 end_thread (struct gdb_xml_parser
*parser
,
3663 const struct gdb_xml_element
*element
,
3664 void *user_data
, const char *body_text
)
3666 struct threads_listing_context
*data
3667 = (struct threads_listing_context
*) user_data
;
3669 if (body_text
!= NULL
&& *body_text
!= '\0')
3670 data
->items
.back ().extra
= body_text
;
3673 const struct gdb_xml_attribute thread_attributes
[] = {
3674 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3675 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3676 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3677 { "handle", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3678 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3681 const struct gdb_xml_element thread_children
[] = {
3682 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3685 const struct gdb_xml_element threads_children
[] = {
3686 { "thread", thread_attributes
, thread_children
,
3687 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3688 start_thread
, end_thread
},
3689 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3692 const struct gdb_xml_element threads_elements
[] = {
3693 { "threads", NULL
, threads_children
,
3694 GDB_XML_EF_NONE
, NULL
, NULL
},
3695 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3700 /* List remote threads using qXfer:threads:read. */
3703 remote_target::remote_get_threads_with_qxfer (threads_listing_context
*context
)
3705 #if defined(HAVE_LIBEXPAT)
3706 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3708 gdb::optional
<gdb::char_vector
> xml
3709 = target_read_stralloc (this, TARGET_OBJECT_THREADS
, NULL
);
3711 if (xml
&& (*xml
)[0] != '\0')
3713 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3714 threads_elements
, xml
->data (), context
);
3724 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3727 remote_target::remote_get_threads_with_qthreadinfo (threads_listing_context
*context
)
3729 struct remote_state
*rs
= get_remote_state ();
3731 if (rs
->use_threadinfo_query
)
3735 putpkt ("qfThreadInfo");
3736 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3738 if (bufp
[0] != '\0') /* q packet recognized */
3740 while (*bufp
++ == 'm') /* reply contains one or more TID */
3744 ptid_t ptid
= read_ptid (bufp
, &bufp
);
3745 context
->items
.emplace_back (ptid
);
3747 while (*bufp
++ == ','); /* comma-separated list */
3748 putpkt ("qsThreadInfo");
3749 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3756 /* Packet not recognized. */
3757 rs
->use_threadinfo_query
= 0;
3764 /* Implement the to_update_thread_list function for the remote
3768 remote_target::update_thread_list ()
3770 struct threads_listing_context context
;
3773 /* We have a few different mechanisms to fetch the thread list. Try
3774 them all, starting with the most preferred one first, falling
3775 back to older methods. */
3776 if (remote_get_threads_with_qxfer (&context
)
3777 || remote_get_threads_with_qthreadinfo (&context
)
3778 || remote_get_threads_with_ql (&context
))
3782 if (context
.items
.empty ()
3783 && remote_thread_always_alive (inferior_ptid
))
3785 /* Some targets don't really support threads, but still
3786 reply an (empty) thread list in response to the thread
3787 listing packets, instead of replying "packet not
3788 supported". Exit early so we don't delete the main
3793 /* CONTEXT now holds the current thread list on the remote
3794 target end. Delete GDB-side threads no longer found on the
3796 for (thread_info
*tp
: all_threads_safe ())
3798 if (!context
.contains_thread (tp
->ptid
))
3805 /* Remove any unreported fork child threads from CONTEXT so
3806 that we don't interfere with follow fork, which is where
3807 creation of such threads is handled. */
3808 remove_new_fork_children (&context
);
3810 /* And now add threads we don't know about yet to our list. */
3811 for (thread_item
&item
: context
.items
)
3813 if (item
.ptid
!= null_ptid
)
3815 /* In non-stop mode, we assume new found threads are
3816 executing until proven otherwise with a stop reply.
3817 In all-stop, we can only get here if all threads are
3819 int executing
= target_is_non_stop_p () ? 1 : 0;
3821 remote_notice_new_inferior (item
.ptid
, executing
);
3823 thread_info
*tp
= find_thread_ptid (item
.ptid
);
3824 remote_thread_info
*info
= get_remote_thread_info (tp
);
3825 info
->core
= item
.core
;
3826 info
->extra
= std::move (item
.extra
);
3827 info
->name
= std::move (item
.name
);
3828 info
->thread_handle
= std::move (item
.thread_handle
);
3835 /* If no thread listing method is supported, then query whether
3836 each known thread is alive, one by one, with the T packet.
3837 If the target doesn't support threads at all, then this is a
3838 no-op. See remote_thread_alive. */
3844 * Collect a descriptive string about the given thread.
3845 * The target may say anything it wants to about the thread
3846 * (typically info about its blocked / runnable state, name, etc.).
3847 * This string will appear in the info threads display.
3849 * Optional: targets are not required to implement this function.
3853 remote_target::extra_thread_info (thread_info
*tp
)
3855 struct remote_state
*rs
= get_remote_state ();
3858 struct gdb_ext_thread_info threadinfo
;
3860 if (rs
->remote_desc
== 0) /* paranoia */
3861 internal_error (__FILE__
, __LINE__
,
3862 _("remote_threads_extra_info"));
3864 if (tp
->ptid
== magic_null_ptid
3865 || (tp
->ptid
.pid () != 0 && tp
->ptid
.lwp () == 0))
3866 /* This is the main thread which was added by GDB. The remote
3867 server doesn't know about it. */
3870 std::string
&extra
= get_remote_thread_info (tp
)->extra
;
3872 /* If already have cached info, use it. */
3873 if (!extra
.empty ())
3874 return extra
.c_str ();
3876 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3878 /* If we're using qXfer:threads:read, then the extra info is
3879 included in the XML. So if we didn't have anything cached,
3880 it's because there's really no extra info. */
3884 if (rs
->use_threadextra_query
)
3887 char *endb
= rs
->buf
+ get_remote_packet_size ();
3889 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3891 write_ptid (b
, endb
, tp
->ptid
);
3894 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3895 if (rs
->buf
[0] != 0)
3897 extra
.resize (strlen (rs
->buf
) / 2);
3898 hex2bin (rs
->buf
, (gdb_byte
*) &extra
[0], extra
.size ());
3899 return extra
.c_str ();
3903 /* If the above query fails, fall back to the old method. */
3904 rs
->use_threadextra_query
= 0;
3905 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3906 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3907 int_to_threadref (&id
, tp
->ptid
.lwp ());
3908 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3909 if (threadinfo
.active
)
3911 if (*threadinfo
.shortname
)
3912 string_appendf (extra
, " Name: %s", threadinfo
.shortname
);
3913 if (*threadinfo
.display
)
3915 if (!extra
.empty ())
3917 string_appendf (extra
, " State: %s", threadinfo
.display
);
3919 if (*threadinfo
.more_display
)
3921 if (!extra
.empty ())
3923 string_appendf (extra
, " Priority: %s", threadinfo
.more_display
);
3925 return extra
.c_str ();
3932 remote_target::static_tracepoint_marker_at (CORE_ADDR addr
,
3933 struct static_tracepoint_marker
*marker
)
3935 struct remote_state
*rs
= get_remote_state ();
3938 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3940 p
+= hexnumstr (p
, addr
);
3942 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3946 error (_("Remote failure reply: %s"), p
);
3950 parse_static_tracepoint_marker_definition (p
, NULL
, marker
);
3957 std::vector
<static_tracepoint_marker
>
3958 remote_target::static_tracepoint_markers_by_strid (const char *strid
)
3960 struct remote_state
*rs
= get_remote_state ();
3961 std::vector
<static_tracepoint_marker
> markers
;
3963 static_tracepoint_marker marker
;
3965 /* Ask for a first packet of static tracepoint marker
3968 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3971 error (_("Remote failure reply: %s"), p
);
3977 parse_static_tracepoint_marker_definition (p
, &p
, &marker
);
3979 if (strid
== NULL
|| marker
.str_id
== strid
)
3980 markers
.push_back (std::move (marker
));
3982 while (*p
++ == ','); /* comma-separated list */
3983 /* Ask for another packet of static tracepoint definition. */
3985 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3993 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3996 remote_target::get_ada_task_ptid (long lwp
, long thread
)
3998 return ptid_t (inferior_ptid
.pid (), lwp
, 0);
4002 /* Restart the remote side; this is an extended protocol operation. */
4005 remote_target::extended_remote_restart ()
4007 struct remote_state
*rs
= get_remote_state ();
4009 /* Send the restart command; for reasons I don't understand the
4010 remote side really expects a number after the "R". */
4011 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
4014 remote_fileio_reset ();
4017 /* Clean up connection to a remote debugger. */
4020 remote_target::close ()
4022 /* Make sure we leave stdin registered in the event loop. */
4025 /* We don't have a connection to the remote stub anymore. Get rid
4026 of all the inferiors and their threads we were controlling.
4027 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
4028 will be unable to find the thread corresponding to (pid, 0, 0). */
4029 inferior_ptid
= null_ptid
;
4030 discard_all_inferiors ();
4032 trace_reset_local_state ();
4037 remote_target::~remote_target ()
4039 struct remote_state
*rs
= get_remote_state ();
4041 /* Check for NULL because we may get here with a partially
4042 constructed target/connection. */
4043 if (rs
->remote_desc
== nullptr)
4046 serial_close (rs
->remote_desc
);
4048 /* We are destroying the remote target, so we should discard
4049 everything of this target. */
4050 discard_pending_stop_replies_in_queue ();
4052 if (rs
->remote_async_inferior_event_token
)
4053 delete_async_event_handler (&rs
->remote_async_inferior_event_token
);
4055 remote_notif_state_xfree (rs
->notif_state
);
4058 /* Query the remote side for the text, data and bss offsets. */
4061 remote_target::get_offsets ()
4063 struct remote_state
*rs
= get_remote_state ();
4066 int lose
, num_segments
= 0, do_sections
, do_segments
;
4067 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
4068 struct section_offsets
*offs
;
4069 struct symfile_segment_data
*data
;
4071 if (symfile_objfile
== NULL
)
4074 putpkt ("qOffsets");
4075 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4078 if (buf
[0] == '\000')
4079 return; /* Return silently. Stub doesn't support
4083 warning (_("Remote failure reply: %s"), buf
);
4087 /* Pick up each field in turn. This used to be done with scanf, but
4088 scanf will make trouble if CORE_ADDR size doesn't match
4089 conversion directives correctly. The following code will work
4090 with any size of CORE_ADDR. */
4091 text_addr
= data_addr
= bss_addr
= 0;
4095 if (startswith (ptr
, "Text="))
4098 /* Don't use strtol, could lose on big values. */
4099 while (*ptr
&& *ptr
!= ';')
4100 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4102 if (startswith (ptr
, ";Data="))
4105 while (*ptr
&& *ptr
!= ';')
4106 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4111 if (!lose
&& startswith (ptr
, ";Bss="))
4114 while (*ptr
&& *ptr
!= ';')
4115 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
4117 if (bss_addr
!= data_addr
)
4118 warning (_("Target reported unsupported offsets: %s"), buf
);
4123 else if (startswith (ptr
, "TextSeg="))
4126 /* Don't use strtol, could lose on big values. */
4127 while (*ptr
&& *ptr
!= ';')
4128 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
4131 if (startswith (ptr
, ";DataSeg="))
4134 while (*ptr
&& *ptr
!= ';')
4135 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
4143 error (_("Malformed response to offset query, %s"), buf
);
4144 else if (*ptr
!= '\0')
4145 warning (_("Target reported unsupported offsets: %s"), buf
);
4147 offs
= ((struct section_offsets
*)
4148 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
4149 memcpy (offs
, symfile_objfile
->section_offsets
,
4150 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
4152 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
4153 do_segments
= (data
!= NULL
);
4154 do_sections
= num_segments
== 0;
4156 if (num_segments
> 0)
4158 segments
[0] = text_addr
;
4159 segments
[1] = data_addr
;
4161 /* If we have two segments, we can still try to relocate everything
4162 by assuming that the .text and .data offsets apply to the whole
4163 text and data segments. Convert the offsets given in the packet
4164 to base addresses for symfile_map_offsets_to_segments. */
4165 else if (data
&& data
->num_segments
== 2)
4167 segments
[0] = data
->segment_bases
[0] + text_addr
;
4168 segments
[1] = data
->segment_bases
[1] + data_addr
;
4171 /* If the object file has only one segment, assume that it is text
4172 rather than data; main programs with no writable data are rare,
4173 but programs with no code are useless. Of course the code might
4174 have ended up in the data segment... to detect that we would need
4175 the permissions here. */
4176 else if (data
&& data
->num_segments
== 1)
4178 segments
[0] = data
->segment_bases
[0] + text_addr
;
4181 /* There's no way to relocate by segment. */
4187 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
4188 offs
, num_segments
, segments
);
4190 if (ret
== 0 && !do_sections
)
4191 error (_("Can not handle qOffsets TextSeg "
4192 "response with this symbol file"));
4199 free_symfile_segment_data (data
);
4203 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
4205 /* This is a temporary kludge to force data and bss to use the
4206 same offsets because that's what nlmconv does now. The real
4207 solution requires changes to the stub and remote.c that I
4208 don't have time to do right now. */
4210 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
4211 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
4214 objfile_relocate (symfile_objfile
, offs
);
4217 /* Send interrupt_sequence to remote target. */
4220 remote_target::send_interrupt_sequence ()
4222 struct remote_state
*rs
= get_remote_state ();
4224 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
4225 remote_serial_write ("\x03", 1);
4226 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
4227 serial_send_break (rs
->remote_desc
);
4228 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
4230 serial_send_break (rs
->remote_desc
);
4231 remote_serial_write ("g", 1);
4234 internal_error (__FILE__
, __LINE__
,
4235 _("Invalid value for interrupt_sequence_mode: %s."),
4236 interrupt_sequence_mode
);
4240 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
4241 and extract the PTID. Returns NULL_PTID if not found. */
4244 stop_reply_extract_thread (char *stop_reply
)
4246 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
4250 /* Txx r:val ; r:val (...) */
4253 /* Look for "register" named "thread". */
4258 p1
= strchr (p
, ':');
4262 if (strncmp (p
, "thread", p1
- p
) == 0)
4263 return read_ptid (++p1
, &p
);
4265 p1
= strchr (p
, ';');
4277 /* Determine the remote side's current thread. If we have a stop
4278 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
4279 "thread" register we can extract the current thread from. If not,
4280 ask the remote which is the current thread with qC. The former
4281 method avoids a roundtrip. */
4284 remote_target::get_current_thread (char *wait_status
)
4286 ptid_t ptid
= null_ptid
;
4288 /* Note we don't use remote_parse_stop_reply as that makes use of
4289 the target architecture, which we haven't yet fully determined at
4291 if (wait_status
!= NULL
)
4292 ptid
= stop_reply_extract_thread (wait_status
);
4293 if (ptid
== null_ptid
)
4294 ptid
= remote_current_thread (inferior_ptid
);
4299 /* Query the remote target for which is the current thread/process,
4300 add it to our tables, and update INFERIOR_PTID. The caller is
4301 responsible for setting the state such that the remote end is ready
4302 to return the current thread.
4304 This function is called after handling the '?' or 'vRun' packets,
4305 whose response is a stop reply from which we can also try
4306 extracting the thread. If the target doesn't support the explicit
4307 qC query, we infer the current thread from that stop reply, passed
4308 in in WAIT_STATUS, which may be NULL. */
4311 remote_target::add_current_inferior_and_thread (char *wait_status
)
4313 struct remote_state
*rs
= get_remote_state ();
4316 inferior_ptid
= null_ptid
;
4318 /* Now, if we have thread information, update inferior_ptid. */
4319 ptid_t curr_ptid
= get_current_thread (wait_status
);
4321 if (curr_ptid
!= null_ptid
)
4323 if (!remote_multi_process_p (rs
))
4328 /* Without this, some commands which require an active target
4329 (such as kill) won't work. This variable serves (at least)
4330 double duty as both the pid of the target process (if it has
4331 such), and as a flag indicating that a target is active. */
4332 curr_ptid
= magic_null_ptid
;
4336 remote_add_inferior (fake_pid_p
, curr_ptid
.pid (), -1, 1);
4338 /* Add the main thread and switch to it. Don't try reading
4339 registers yet, since we haven't fetched the target description
4341 thread_info
*tp
= add_thread_silent (curr_ptid
);
4342 switch_to_thread_no_regs (tp
);
4345 /* Print info about a thread that was found already stopped on
4349 print_one_stopped_thread (struct thread_info
*thread
)
4351 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
4353 switch_to_thread (thread
);
4354 thread
->suspend
.stop_pc
= get_frame_pc (get_current_frame ());
4355 set_current_sal_from_frame (get_current_frame ());
4357 thread
->suspend
.waitstatus_pending_p
= 0;
4359 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
4361 enum gdb_signal sig
= ws
->value
.sig
;
4363 if (signal_print_state (sig
))
4364 gdb::observers::signal_received
.notify (sig
);
4366 gdb::observers::normal_stop
.notify (NULL
, 1);
4369 /* Process all initial stop replies the remote side sent in response
4370 to the ? packet. These indicate threads that were already stopped
4371 on initial connection. We mark these threads as stopped and print
4372 their current frame before giving the user the prompt. */
4375 remote_target::process_initial_stop_replies (int from_tty
)
4377 int pending_stop_replies
= stop_reply_queue_length ();
4378 struct thread_info
*selected
= NULL
;
4379 struct thread_info
*lowest_stopped
= NULL
;
4380 struct thread_info
*first
= NULL
;
4382 /* Consume the initial pending events. */
4383 while (pending_stop_replies
-- > 0)
4385 ptid_t waiton_ptid
= minus_one_ptid
;
4387 struct target_waitstatus ws
;
4388 int ignore_event
= 0;
4390 memset (&ws
, 0, sizeof (ws
));
4391 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
4393 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
4397 case TARGET_WAITKIND_IGNORE
:
4398 case TARGET_WAITKIND_NO_RESUMED
:
4399 case TARGET_WAITKIND_SIGNALLED
:
4400 case TARGET_WAITKIND_EXITED
:
4401 /* We shouldn't see these, but if we do, just ignore. */
4403 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
4407 case TARGET_WAITKIND_EXECD
:
4408 xfree (ws
.value
.execd_pathname
);
4417 struct thread_info
*evthread
= find_thread_ptid (event_ptid
);
4419 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
4421 enum gdb_signal sig
= ws
.value
.sig
;
4423 /* Stubs traditionally report SIGTRAP as initial signal,
4424 instead of signal 0. Suppress it. */
4425 if (sig
== GDB_SIGNAL_TRAP
)
4427 evthread
->suspend
.stop_signal
= sig
;
4431 evthread
->suspend
.waitstatus
= ws
;
4433 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
4434 || ws
.value
.sig
!= GDB_SIGNAL_0
)
4435 evthread
->suspend
.waitstatus_pending_p
= 1;
4437 set_executing (event_ptid
, 0);
4438 set_running (event_ptid
, 0);
4439 get_remote_thread_info (evthread
)->vcont_resumed
= 0;
4442 /* "Notice" the new inferiors before anything related to
4443 registers/memory. */
4444 for (inferior
*inf
: all_non_exited_inferiors ())
4446 inf
->needs_setup
= 1;
4450 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4451 notice_new_inferior (thread
, thread
->state
== THREAD_RUNNING
,
4456 /* If all-stop on top of non-stop, pause all threads. Note this
4457 records the threads' stop pc, so must be done after "noticing"
4461 stop_all_threads ();
4463 /* If all threads of an inferior were already stopped, we
4464 haven't setup the inferior yet. */
4465 for (inferior
*inf
: all_non_exited_inferiors ())
4467 if (inf
->needs_setup
)
4469 thread_info
*thread
= any_live_thread_of_inferior (inf
);
4470 switch_to_thread_no_regs (thread
);
4476 /* Now go over all threads that are stopped, and print their current
4477 frame. If all-stop, then if there's a signalled thread, pick
4479 for (thread_info
*thread
: all_non_exited_threads ())
4485 thread
->set_running (false);
4486 else if (thread
->state
!= THREAD_STOPPED
)
4489 if (selected
== NULL
4490 && thread
->suspend
.waitstatus_pending_p
)
4493 if (lowest_stopped
== NULL
4494 || thread
->inf
->num
< lowest_stopped
->inf
->num
4495 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4496 lowest_stopped
= thread
;
4499 print_one_stopped_thread (thread
);
4502 /* In all-stop, we only print the status of one thread, and leave
4503 others with their status pending. */
4506 thread_info
*thread
= selected
;
4508 thread
= lowest_stopped
;
4512 print_one_stopped_thread (thread
);
4515 /* For "info program". */
4516 thread_info
*thread
= inferior_thread ();
4517 if (thread
->state
== THREAD_STOPPED
)
4518 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
4521 /* Start the remote connection and sync state. */
4524 remote_target::start_remote (int from_tty
, int extended_p
)
4526 struct remote_state
*rs
= get_remote_state ();
4527 struct packet_config
*noack_config
;
4528 char *wait_status
= NULL
;
4530 /* Signal other parts that we're going through the initial setup,
4531 and so things may not be stable yet. E.g., we don't try to
4532 install tracepoints until we've relocated symbols. Also, a
4533 Ctrl-C before we're connected and synced up can't interrupt the
4534 target. Instead, it offers to drop the (potentially wedged)
4536 rs
->starting_up
= 1;
4540 if (interrupt_on_connect
)
4541 send_interrupt_sequence ();
4543 /* Ack any packet which the remote side has already sent. */
4544 remote_serial_write ("+", 1);
4546 /* The first packet we send to the target is the optional "supported
4547 packets" request. If the target can answer this, it will tell us
4548 which later probes to skip. */
4549 remote_query_supported ();
4551 /* If the stub wants to get a QAllow, compose one and send it. */
4552 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4555 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4556 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4557 as a reply to known packet. For packet "vFile:setfs:" it is an
4558 invalid reply and GDB would return error in
4559 remote_hostio_set_filesystem, making remote files access impossible.
4560 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4561 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4563 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4565 putpkt (v_mustreplyempty
);
4566 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4567 if (strcmp (rs
->buf
, "OK") == 0)
4568 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4569 else if (strcmp (rs
->buf
, "") != 0)
4570 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4574 /* Next, we possibly activate noack mode.
4576 If the QStartNoAckMode packet configuration is set to AUTO,
4577 enable noack mode if the stub reported a wish for it with
4580 If set to TRUE, then enable noack mode even if the stub didn't
4581 report it in qSupported. If the stub doesn't reply OK, the
4582 session ends with an error.
4584 If FALSE, then don't activate noack mode, regardless of what the
4585 stub claimed should be the default with qSupported. */
4587 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4588 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4590 putpkt ("QStartNoAckMode");
4591 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4592 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4598 /* Tell the remote that we are using the extended protocol. */
4600 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4603 /* Let the target know which signals it is allowed to pass down to
4605 update_signals_program_target ();
4607 /* Next, if the target can specify a description, read it. We do
4608 this before anything involving memory or registers. */
4609 target_find_description ();
4611 /* Next, now that we know something about the target, update the
4612 address spaces in the program spaces. */
4613 update_address_spaces ();
4615 /* On OSs where the list of libraries is global to all
4616 processes, we fetch them early. */
4617 if (gdbarch_has_global_solist (target_gdbarch ()))
4618 solib_add (NULL
, from_tty
, auto_solib_add
);
4620 if (target_is_non_stop_p ())
4622 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4623 error (_("Non-stop mode requested, but remote "
4624 "does not support non-stop"));
4626 putpkt ("QNonStop:1");
4627 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4629 if (strcmp (rs
->buf
, "OK") != 0)
4630 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4632 /* Find about threads and processes the stub is already
4633 controlling. We default to adding them in the running state.
4634 The '?' query below will then tell us about which threads are
4636 this->update_thread_list ();
4638 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4640 /* Don't assume that the stub can operate in all-stop mode.
4641 Request it explicitly. */
4642 putpkt ("QNonStop:0");
4643 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4645 if (strcmp (rs
->buf
, "OK") != 0)
4646 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4649 /* Upload TSVs regardless of whether the target is running or not. The
4650 remote stub, such as GDBserver, may have some predefined or builtin
4651 TSVs, even if the target is not running. */
4652 if (get_trace_status (current_trace_status ()) != -1)
4654 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4656 upload_trace_state_variables (&uploaded_tsvs
);
4657 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4660 /* Check whether the target is running now. */
4662 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4664 if (!target_is_non_stop_p ())
4666 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4669 error (_("The target is not running (try extended-remote?)"));
4671 /* We're connected, but not running. Drop out before we
4672 call start_remote. */
4673 rs
->starting_up
= 0;
4678 /* Save the reply for later. */
4679 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4680 strcpy (wait_status
, rs
->buf
);
4683 /* Fetch thread list. */
4684 target_update_thread_list ();
4686 /* Let the stub know that we want it to return the thread. */
4687 set_continue_thread (minus_one_ptid
);
4689 if (thread_count () == 0)
4691 /* Target has no concept of threads at all. GDB treats
4692 non-threaded target as single-threaded; add a main
4694 add_current_inferior_and_thread (wait_status
);
4698 /* We have thread information; select the thread the target
4699 says should be current. If we're reconnecting to a
4700 multi-threaded program, this will ideally be the thread
4701 that last reported an event before GDB disconnected. */
4702 inferior_ptid
= get_current_thread (wait_status
);
4703 if (inferior_ptid
== null_ptid
)
4705 /* Odd... The target was able to list threads, but not
4706 tell us which thread was current (no "thread"
4707 register in T stop reply?). Just pick the first
4708 thread in the thread list then. */
4711 fprintf_unfiltered (gdb_stdlog
,
4712 "warning: couldn't determine remote "
4713 "current thread; picking first in list.\n");
4715 inferior_ptid
= inferior_list
->thread_list
->ptid
;
4719 /* init_wait_for_inferior should be called before get_offsets in order
4720 to manage `inserted' flag in bp loc in a correct state.
4721 breakpoint_init_inferior, called from init_wait_for_inferior, set
4722 `inserted' flag to 0, while before breakpoint_re_set, called from
4723 start_remote, set `inserted' flag to 1. In the initialization of
4724 inferior, breakpoint_init_inferior should be called first, and then
4725 breakpoint_re_set can be called. If this order is broken, state of
4726 `inserted' flag is wrong, and cause some problems on breakpoint
4728 init_wait_for_inferior ();
4730 get_offsets (); /* Get text, data & bss offsets. */
4732 /* If we could not find a description using qXfer, and we know
4733 how to do it some other way, try again. This is not
4734 supported for non-stop; it could be, but it is tricky if
4735 there are no stopped threads when we connect. */
4736 if (remote_read_description_p (this)
4737 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4739 target_clear_description ();
4740 target_find_description ();
4743 /* Use the previously fetched status. */
4744 gdb_assert (wait_status
!= NULL
);
4745 strcpy (rs
->buf
, wait_status
);
4746 rs
->cached_wait_status
= 1;
4748 ::start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4752 /* Clear WFI global state. Do this before finding about new
4753 threads and inferiors, and setting the current inferior.
4754 Otherwise we would clear the proceed status of the current
4755 inferior when we want its stop_soon state to be preserved
4756 (see notice_new_inferior). */
4757 init_wait_for_inferior ();
4759 /* In non-stop, we will either get an "OK", meaning that there
4760 are no stopped threads at this time; or, a regular stop
4761 reply. In the latter case, there may be more than one thread
4762 stopped --- we pull them all out using the vStopped
4764 if (strcmp (rs
->buf
, "OK") != 0)
4766 struct notif_client
*notif
= ¬if_client_stop
;
4768 /* remote_notif_get_pending_replies acks this one, and gets
4770 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4771 = remote_notif_parse (this, notif
, rs
->buf
);
4772 remote_notif_get_pending_events (notif
);
4775 if (thread_count () == 0)
4778 error (_("The target is not running (try extended-remote?)"));
4780 /* We're connected, but not running. Drop out before we
4781 call start_remote. */
4782 rs
->starting_up
= 0;
4786 /* In non-stop mode, any cached wait status will be stored in
4787 the stop reply queue. */
4788 gdb_assert (wait_status
== NULL
);
4790 /* Report all signals during attach/startup. */
4791 pass_signals (0, NULL
);
4793 /* If there are already stopped threads, mark them stopped and
4794 report their stops before giving the prompt to the user. */
4795 process_initial_stop_replies (from_tty
);
4797 if (target_can_async_p ())
4801 /* If we connected to a live target, do some additional setup. */
4802 if (target_has_execution
)
4804 if (symfile_objfile
) /* No use without a symbol-file. */
4805 remote_check_symbols ();
4808 /* Possibly the target has been engaged in a trace run started
4809 previously; find out where things are at. */
4810 if (get_trace_status (current_trace_status ()) != -1)
4812 struct uploaded_tp
*uploaded_tps
= NULL
;
4814 if (current_trace_status ()->running
)
4815 printf_filtered (_("Trace is already running on the target.\n"));
4817 upload_tracepoints (&uploaded_tps
);
4819 merge_uploaded_tracepoints (&uploaded_tps
);
4822 /* Possibly the target has been engaged in a btrace record started
4823 previously; find out where things are at. */
4824 remote_btrace_maybe_reopen ();
4826 /* The thread and inferior lists are now synchronized with the
4827 target, our symbols have been relocated, and we're merged the
4828 target's tracepoints with ours. We're done with basic start
4830 rs
->starting_up
= 0;
4832 /* Maybe breakpoints are global and need to be inserted now. */
4833 if (breakpoints_should_be_inserted_now ())
4834 insert_breakpoints ();
4837 /* Open a connection to a remote debugger.
4838 NAME is the filename used for communication. */
4841 remote_target::open (const char *name
, int from_tty
)
4843 open_1 (name
, from_tty
, 0);
4846 /* Open a connection to a remote debugger using the extended
4847 remote gdb protocol. NAME is the filename used for communication. */
4850 extended_remote_target::open (const char *name
, int from_tty
)
4852 open_1 (name
, from_tty
, 1 /*extended_p */);
4855 /* Reset all packets back to "unknown support". Called when opening a
4856 new connection to a remote target. */
4859 reset_all_packet_configs_support (void)
4863 for (i
= 0; i
< PACKET_MAX
; i
++)
4864 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4867 /* Initialize all packet configs. */
4870 init_all_packet_configs (void)
4874 for (i
= 0; i
< PACKET_MAX
; i
++)
4876 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4877 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4881 /* Symbol look-up. */
4884 remote_target::remote_check_symbols ()
4889 struct cleanup
*old_chain
;
4891 /* The remote side has no concept of inferiors that aren't running
4892 yet, it only knows about running processes. If we're connected
4893 but our current inferior is not running, we should not invite the
4894 remote target to request symbol lookups related to its
4895 (unrelated) current process. */
4896 if (!target_has_execution
)
4899 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4902 /* Make sure the remote is pointing at the right process. Note
4903 there's no way to select "no process". */
4904 set_general_process ();
4906 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4907 because we need both at the same time. */
4908 gdb::char_vector
msg (get_remote_packet_size ());
4909 reply
= (char *) xmalloc (get_remote_packet_size ());
4910 old_chain
= make_cleanup (free_current_contents
, &reply
);
4911 reply_size
= get_remote_packet_size ();
4913 /* Invite target to request symbol lookups. */
4915 putpkt ("qSymbol::");
4916 getpkt (&reply
, &reply_size
, 0);
4917 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4919 while (startswith (reply
, "qSymbol:"))
4921 struct bound_minimal_symbol sym
;
4924 end
= hex2bin (tmp
, reinterpret_cast <gdb_byte
*> (msg
.data ()),
4927 sym
= lookup_minimal_symbol (msg
.data (), NULL
, NULL
);
4928 if (sym
.minsym
== NULL
)
4929 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol::%s",
4933 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4934 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4936 /* If this is a function address, return the start of code
4937 instead of any data function descriptor. */
4938 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4940 current_top_target ());
4942 xsnprintf (msg
.data (), get_remote_packet_size (), "qSymbol:%s:%s",
4943 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4946 putpkt (msg
.data ());
4947 getpkt (&reply
, &reply_size
, 0);
4950 do_cleanups (old_chain
);
4953 static struct serial
*
4954 remote_serial_open (const char *name
)
4956 static int udp_warning
= 0;
4958 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4959 of in ser-tcp.c, because it is the remote protocol assuming that the
4960 serial connection is reliable and not the serial connection promising
4962 if (!udp_warning
&& startswith (name
, "udp:"))
4964 warning (_("The remote protocol may be unreliable over UDP.\n"
4965 "Some events may be lost, rendering further debugging "
4970 return serial_open (name
);
4973 /* Inform the target of our permission settings. The permission flags
4974 work without this, but if the target knows the settings, it can do
4975 a couple things. First, it can add its own check, to catch cases
4976 that somehow manage to get by the permissions checks in target
4977 methods. Second, if the target is wired to disallow particular
4978 settings (for instance, a system in the field that is not set up to
4979 be able to stop at a breakpoint), it can object to any unavailable
4983 remote_target::set_permissions ()
4985 struct remote_state
*rs
= get_remote_state ();
4987 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4988 "WriteReg:%x;WriteMem:%x;"
4989 "InsertBreak:%x;InsertTrace:%x;"
4990 "InsertFastTrace:%x;Stop:%x",
4991 may_write_registers
, may_write_memory
,
4992 may_insert_breakpoints
, may_insert_tracepoints
,
4993 may_insert_fast_tracepoints
, may_stop
);
4995 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4997 /* If the target didn't like the packet, warn the user. Do not try
4998 to undo the user's settings, that would just be maddening. */
4999 if (strcmp (rs
->buf
, "OK") != 0)
5000 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
5003 /* This type describes each known response to the qSupported
5005 struct protocol_feature
5007 /* The name of this protocol feature. */
5010 /* The default for this protocol feature. */
5011 enum packet_support default_support
;
5013 /* The function to call when this feature is reported, or after
5014 qSupported processing if the feature is not supported.
5015 The first argument points to this structure. The second
5016 argument indicates whether the packet requested support be
5017 enabled, disabled, or probed (or the default, if this function
5018 is being called at the end of processing and this feature was
5019 not reported). The third argument may be NULL; if not NULL, it
5020 is a NUL-terminated string taken from the packet following
5021 this feature's name and an equals sign. */
5022 void (*func
) (remote_target
*remote
, const struct protocol_feature
*,
5023 enum packet_support
, const char *);
5025 /* The corresponding packet for this feature. Only used if
5026 FUNC is remote_supported_packet. */
5031 remote_supported_packet (remote_target
*remote
,
5032 const struct protocol_feature
*feature
,
5033 enum packet_support support
,
5034 const char *argument
)
5038 warning (_("Remote qSupported response supplied an unexpected value for"
5039 " \"%s\"."), feature
->name
);
5043 remote_protocol_packets
[feature
->packet
].support
= support
;
5047 remote_target::remote_packet_size (const protocol_feature
*feature
,
5048 enum packet_support support
, const char *value
)
5050 struct remote_state
*rs
= get_remote_state ();
5055 if (support
!= PACKET_ENABLE
)
5058 if (value
== NULL
|| *value
== '\0')
5060 warning (_("Remote target reported \"%s\" without a size."),
5066 packet_size
= strtol (value
, &value_end
, 16);
5067 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
5069 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
5070 feature
->name
, value
);
5074 /* Record the new maximum packet size. */
5075 rs
->explicit_packet_size
= packet_size
;
5079 remote_packet_size (remote_target
*remote
, const protocol_feature
*feature
,
5080 enum packet_support support
, const char *value
)
5082 remote
->remote_packet_size (feature
, support
, value
);
5085 static const struct protocol_feature remote_protocol_features
[] = {
5086 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
5087 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
5088 PACKET_qXfer_auxv
},
5089 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
5090 PACKET_qXfer_exec_file
},
5091 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
5092 PACKET_qXfer_features
},
5093 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
5094 PACKET_qXfer_libraries
},
5095 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
5096 PACKET_qXfer_libraries_svr4
},
5097 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
5098 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
5099 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
5100 PACKET_qXfer_memory_map
},
5101 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
5102 PACKET_qXfer_spu_read
},
5103 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
5104 PACKET_qXfer_spu_write
},
5105 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
5106 PACKET_qXfer_osdata
},
5107 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
5108 PACKET_qXfer_threads
},
5109 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
5110 PACKET_qXfer_traceframe_info
},
5111 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
5112 PACKET_QPassSignals
},
5113 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
5114 PACKET_QCatchSyscalls
},
5115 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
5116 PACKET_QProgramSignals
},
5117 { "QSetWorkingDir", PACKET_DISABLE
, remote_supported_packet
,
5118 PACKET_QSetWorkingDir
},
5119 { "QStartupWithShell", PACKET_DISABLE
, remote_supported_packet
,
5120 PACKET_QStartupWithShell
},
5121 { "QEnvironmentHexEncoded", PACKET_DISABLE
, remote_supported_packet
,
5122 PACKET_QEnvironmentHexEncoded
},
5123 { "QEnvironmentReset", PACKET_DISABLE
, remote_supported_packet
,
5124 PACKET_QEnvironmentReset
},
5125 { "QEnvironmentUnset", PACKET_DISABLE
, remote_supported_packet
,
5126 PACKET_QEnvironmentUnset
},
5127 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
5128 PACKET_QStartNoAckMode
},
5129 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
5130 PACKET_multiprocess_feature
},
5131 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
5132 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
5133 PACKET_qXfer_siginfo_read
},
5134 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
5135 PACKET_qXfer_siginfo_write
},
5136 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5137 PACKET_ConditionalTracepoints
},
5138 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
5139 PACKET_ConditionalBreakpoints
},
5140 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
5141 PACKET_BreakpointCommands
},
5142 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5143 PACKET_FastTracepoints
},
5144 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5145 PACKET_StaticTracepoints
},
5146 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
5147 PACKET_InstallInTrace
},
5148 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
5149 PACKET_DisconnectedTracing_feature
},
5150 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
5152 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
5154 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
5155 PACKET_TracepointSource
},
5156 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
5158 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
5159 PACKET_EnableDisableTracepoints_feature
},
5160 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
5161 PACKET_qXfer_fdpic
},
5162 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
5164 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
5165 PACKET_QDisableRandomization
},
5166 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
5167 { "QTBuffer:size", PACKET_DISABLE
,
5168 remote_supported_packet
, PACKET_QTBuffer_size
},
5169 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
5170 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
5171 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
5172 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
5173 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
5174 PACKET_qXfer_btrace
},
5175 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
5176 PACKET_qXfer_btrace_conf
},
5177 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
5178 PACKET_Qbtrace_conf_bts_size
},
5179 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
5180 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
5181 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
5182 PACKET_fork_event_feature
},
5183 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
5184 PACKET_vfork_event_feature
},
5185 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
5186 PACKET_exec_event_feature
},
5187 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
5188 PACKET_Qbtrace_conf_pt_size
},
5189 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
5190 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
5191 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
5194 static char *remote_support_xml
;
5196 /* Register string appended to "xmlRegisters=" in qSupported query. */
5199 register_remote_support_xml (const char *xml
)
5201 #if defined(HAVE_LIBEXPAT)
5202 if (remote_support_xml
== NULL
)
5203 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
5206 char *copy
= xstrdup (remote_support_xml
+ 13);
5207 char *p
= strtok (copy
, ",");
5211 if (strcmp (p
, xml
) == 0)
5218 while ((p
= strtok (NULL
, ",")) != NULL
);
5221 remote_support_xml
= reconcat (remote_support_xml
,
5222 remote_support_xml
, ",", xml
,
5229 remote_query_supported_append (std::string
*msg
, const char *append
)
5233 msg
->append (append
);
5237 remote_target::remote_query_supported ()
5239 struct remote_state
*rs
= get_remote_state ();
5242 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
5244 /* The packet support flags are handled differently for this packet
5245 than for most others. We treat an error, a disabled packet, and
5246 an empty response identically: any features which must be reported
5247 to be used will be automatically disabled. An empty buffer
5248 accomplishes this, since that is also the representation for a list
5249 containing no features. */
5252 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
5256 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
5257 remote_query_supported_append (&q
, "multiprocess+");
5259 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5260 remote_query_supported_append (&q
, "swbreak+");
5261 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
5262 remote_query_supported_append (&q
, "hwbreak+");
5264 remote_query_supported_append (&q
, "qRelocInsn+");
5266 if (packet_set_cmd_state (PACKET_fork_event_feature
)
5267 != AUTO_BOOLEAN_FALSE
)
5268 remote_query_supported_append (&q
, "fork-events+");
5269 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
5270 != AUTO_BOOLEAN_FALSE
)
5271 remote_query_supported_append (&q
, "vfork-events+");
5272 if (packet_set_cmd_state (PACKET_exec_event_feature
)
5273 != AUTO_BOOLEAN_FALSE
)
5274 remote_query_supported_append (&q
, "exec-events+");
5276 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
5277 remote_query_supported_append (&q
, "vContSupported+");
5279 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
5280 remote_query_supported_append (&q
, "QThreadEvents+");
5282 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
5283 remote_query_supported_append (&q
, "no-resumed+");
5285 /* Keep this one last to work around a gdbserver <= 7.10 bug in
5286 the qSupported:xmlRegisters=i386 handling. */
5287 if (remote_support_xml
!= NULL
5288 && packet_support (PACKET_qXfer_features
) != PACKET_DISABLE
)
5289 remote_query_supported_append (&q
, remote_support_xml
);
5291 q
= "qSupported:" + q
;
5292 putpkt (q
.c_str ());
5294 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5296 /* If an error occured, warn, but do not return - just reset the
5297 buffer to empty and go on to disable features. */
5298 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
5301 warning (_("Remote failure reply: %s"), rs
->buf
);
5306 memset (seen
, 0, sizeof (seen
));
5311 enum packet_support is_supported
;
5312 char *p
, *end
, *name_end
, *value
;
5314 /* First separate out this item from the rest of the packet. If
5315 there's another item after this, we overwrite the separator
5316 (terminated strings are much easier to work with). */
5318 end
= strchr (p
, ';');
5321 end
= p
+ strlen (p
);
5331 warning (_("empty item in \"qSupported\" response"));
5336 name_end
= strchr (p
, '=');
5339 /* This is a name=value entry. */
5340 is_supported
= PACKET_ENABLE
;
5341 value
= name_end
+ 1;
5350 is_supported
= PACKET_ENABLE
;
5354 is_supported
= PACKET_DISABLE
;
5358 is_supported
= PACKET_SUPPORT_UNKNOWN
;
5362 warning (_("unrecognized item \"%s\" "
5363 "in \"qSupported\" response"), p
);
5369 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5370 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
5372 const struct protocol_feature
*feature
;
5375 feature
= &remote_protocol_features
[i
];
5376 feature
->func (this, feature
, is_supported
, value
);
5381 /* If we increased the packet size, make sure to increase the global
5382 buffer size also. We delay this until after parsing the entire
5383 qSupported packet, because this is the same buffer we were
5385 if (rs
->buf_size
< rs
->explicit_packet_size
)
5387 rs
->buf_size
= rs
->explicit_packet_size
;
5388 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
5391 /* Handle the defaults for unmentioned features. */
5392 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
5395 const struct protocol_feature
*feature
;
5397 feature
= &remote_protocol_features
[i
];
5398 feature
->func (this, feature
, feature
->default_support
, NULL
);
5402 /* Serial QUIT handler for the remote serial descriptor.
5404 Defers handling a Ctrl-C until we're done with the current
5405 command/response packet sequence, unless:
5407 - We're setting up the connection. Don't send a remote interrupt
5408 request, as we're not fully synced yet. Quit immediately
5411 - The target has been resumed in the foreground
5412 (target_terminal::is_ours is false) with a synchronous resume
5413 packet, and we're blocked waiting for the stop reply, thus a
5414 Ctrl-C should be immediately sent to the target.
5416 - We get a second Ctrl-C while still within the same serial read or
5417 write. In that case the serial is seemingly wedged --- offer to
5420 - We see a second Ctrl-C without target response, after having
5421 previously interrupted the target. In that case the target/stub
5422 is probably wedged --- offer to quit/disconnect.
5426 remote_target::remote_serial_quit_handler ()
5428 struct remote_state
*rs
= get_remote_state ();
5430 if (check_quit_flag ())
5432 /* If we're starting up, we're not fully synced yet. Quit
5434 if (rs
->starting_up
)
5436 else if (rs
->got_ctrlc_during_io
)
5438 if (query (_("The target is not responding to GDB commands.\n"
5439 "Stop debugging it? ")))
5440 remote_unpush_and_throw ();
5442 /* If ^C has already been sent once, offer to disconnect. */
5443 else if (!target_terminal::is_ours () && rs
->ctrlc_pending_p
)
5445 /* All-stop protocol, and blocked waiting for stop reply. Send
5446 an interrupt request. */
5447 else if (!target_terminal::is_ours () && rs
->waiting_for_stop_reply
)
5448 target_interrupt ();
5450 rs
->got_ctrlc_during_io
= 1;
5454 /* The remote_target that is current while the quit handler is
5455 overridden with remote_serial_quit_handler. */
5456 static remote_target
*curr_quit_handler_target
;
5459 remote_serial_quit_handler ()
5461 curr_quit_handler_target
->remote_serial_quit_handler ();
5464 /* Remove any of the remote.c targets from target stack. Upper targets depend
5465 on it so remove them first. */
5468 remote_unpush_target (void)
5470 pop_all_targets_at_and_above (process_stratum
);
5474 remote_unpush_and_throw (void)
5476 remote_unpush_target ();
5477 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5481 remote_target::open_1 (const char *name
, int from_tty
, int extended_p
)
5483 remote_target
*curr_remote
= get_current_remote_target ();
5486 error (_("To open a remote debug connection, you need to specify what\n"
5487 "serial device is attached to the remote system\n"
5488 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
5490 /* If we're connected to a running target, target_preopen will kill it.
5491 Ask this question first, before target_preopen has a chance to kill
5493 if (curr_remote
!= NULL
&& !have_inferiors ())
5496 && !query (_("Already connected to a remote target. Disconnect? ")))
5497 error (_("Still connected."));
5500 /* Here the possibly existing remote target gets unpushed. */
5501 target_preopen (from_tty
);
5503 remote_fileio_reset ();
5504 reopen_exec_file ();
5507 remote_target
*remote
5508 = (extended_p
? new extended_remote_target () : new remote_target ());
5509 target_ops_up
target_holder (remote
);
5511 remote_state
*rs
= remote
->get_remote_state ();
5513 /* See FIXME above. */
5514 if (!target_async_permitted
)
5515 rs
->wait_forever_enabled_p
= 1;
5517 rs
->remote_desc
= remote_serial_open (name
);
5518 if (!rs
->remote_desc
)
5519 perror_with_name (name
);
5521 if (baud_rate
!= -1)
5523 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5525 /* The requested speed could not be set. Error out to
5526 top level after closing remote_desc. Take care to
5527 set remote_desc to NULL to avoid closing remote_desc
5529 serial_close (rs
->remote_desc
);
5530 rs
->remote_desc
= NULL
;
5531 perror_with_name (name
);
5535 serial_setparity (rs
->remote_desc
, serial_parity
);
5536 serial_raw (rs
->remote_desc
);
5538 /* If there is something sitting in the buffer we might take it as a
5539 response to a command, which would be bad. */
5540 serial_flush_input (rs
->remote_desc
);
5544 puts_filtered ("Remote debugging using ");
5545 puts_filtered (name
);
5546 puts_filtered ("\n");
5549 /* Switch to using the remote target now. */
5550 push_target (remote
);
5551 /* The target stack owns the target now. */
5552 target_holder
.release ();
5554 /* Register extra event sources in the event loop. */
5555 rs
->remote_async_inferior_event_token
5556 = create_async_event_handler (remote_async_inferior_event_handler
,
5558 rs
->notif_state
= remote_notif_state_allocate (remote
);
5560 /* Reset the target state; these things will be queried either by
5561 remote_query_supported or as they are needed. */
5562 reset_all_packet_configs_support ();
5563 rs
->cached_wait_status
= 0;
5564 rs
->explicit_packet_size
= 0;
5566 rs
->extended
= extended_p
;
5567 rs
->waiting_for_stop_reply
= 0;
5568 rs
->ctrlc_pending_p
= 0;
5569 rs
->got_ctrlc_during_io
= 0;
5571 rs
->general_thread
= not_sent_ptid
;
5572 rs
->continue_thread
= not_sent_ptid
;
5573 rs
->remote_traceframe_number
= -1;
5575 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5577 /* Probe for ability to use "ThreadInfo" query, as required. */
5578 rs
->use_threadinfo_query
= 1;
5579 rs
->use_threadextra_query
= 1;
5581 rs
->readahead_cache
.invalidate ();
5583 if (target_async_permitted
)
5585 /* FIXME: cagney/1999-09-23: During the initial connection it is
5586 assumed that the target is already ready and able to respond to
5587 requests. Unfortunately remote_start_remote() eventually calls
5588 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5589 around this. Eventually a mechanism that allows
5590 wait_for_inferior() to expect/get timeouts will be
5592 rs
->wait_forever_enabled_p
= 0;
5595 /* First delete any symbols previously loaded from shared libraries. */
5596 no_shared_libraries (NULL
, 0);
5598 /* Start the remote connection. If error() or QUIT, discard this
5599 target (we'd otherwise be in an inconsistent state) and then
5600 propogate the error on up the exception chain. This ensures that
5601 the caller doesn't stumble along blindly assuming that the
5602 function succeeded. The CLI doesn't have this problem but other
5603 UI's, such as MI do.
5605 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5606 this function should return an error indication letting the
5607 caller restore the previous state. Unfortunately the command
5608 ``target remote'' is directly wired to this function making that
5609 impossible. On a positive note, the CLI side of this problem has
5610 been fixed - the function set_cmd_context() makes it possible for
5611 all the ``target ....'' commands to share a common callback
5612 function. See cli-dump.c. */
5617 remote
->start_remote (from_tty
, extended_p
);
5619 CATCH (ex
, RETURN_MASK_ALL
)
5621 /* Pop the partially set up target - unless something else did
5622 already before throwing the exception. */
5623 if (ex
.error
!= TARGET_CLOSE_ERROR
)
5624 remote_unpush_target ();
5625 throw_exception (ex
);
5630 remote_btrace_reset (rs
);
5632 if (target_async_permitted
)
5633 rs
->wait_forever_enabled_p
= 1;
5636 /* Detach the specified process. */
5639 remote_target::remote_detach_pid (int pid
)
5641 struct remote_state
*rs
= get_remote_state ();
5643 /* This should not be necessary, but the handling for D;PID in
5644 GDBserver versions prior to 8.2 incorrectly assumes that the
5645 selected process points to the same process we're detaching,
5646 leading to misbehavior (and possibly GDBserver crashing) when it
5647 does not. Since it's easy and cheap, work around it by forcing
5648 GDBserver to select GDB's current process. */
5649 set_general_process ();
5651 if (remote_multi_process_p (rs
))
5652 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5654 strcpy (rs
->buf
, "D");
5657 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5659 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5661 else if (rs
->buf
[0] == '\0')
5662 error (_("Remote doesn't know how to detach"));
5664 error (_("Can't detach process."));
5667 /* This detaches a program to which we previously attached, using
5668 inferior_ptid to identify the process. After this is done, GDB
5669 can be used to debug some other program. We better not have left
5670 any breakpoints in the target program or it'll die when it hits
5674 remote_target::remote_detach_1 (inferior
*inf
, int from_tty
)
5676 int pid
= inferior_ptid
.pid ();
5677 struct remote_state
*rs
= get_remote_state ();
5680 if (!target_has_execution
)
5681 error (_("No process to detach from."));
5683 target_announce_detach (from_tty
);
5685 /* Tell the remote target to detach. */
5686 remote_detach_pid (pid
);
5688 /* Exit only if this is the only active inferior. */
5689 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5690 puts_filtered (_("Ending remote debugging.\n"));
5692 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5694 /* Check to see if we are detaching a fork parent. Note that if we
5695 are detaching a fork child, tp == NULL. */
5696 is_fork_parent
= (tp
!= NULL
5697 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5699 /* If doing detach-on-fork, we don't mourn, because that will delete
5700 breakpoints that should be available for the followed inferior. */
5701 if (!is_fork_parent
)
5703 /* Save the pid as a string before mourning, since that will
5704 unpush the remote target, and we need the string after. */
5705 std::string infpid
= target_pid_to_str (ptid_t (pid
));
5707 target_mourn_inferior (inferior_ptid
);
5708 if (print_inferior_events
)
5709 printf_unfiltered (_("[Inferior %d (%s) detached]\n"),
5710 inf
->num
, infpid
.c_str ());
5714 inferior_ptid
= null_ptid
;
5715 detach_inferior (current_inferior ());
5720 remote_target::detach (inferior
*inf
, int from_tty
)
5722 remote_detach_1 (inf
, from_tty
);
5726 extended_remote_target::detach (inferior
*inf
, int from_tty
)
5728 remote_detach_1 (inf
, from_tty
);
5731 /* Target follow-fork function for remote targets. On entry, and
5732 at return, the current inferior is the fork parent.
5734 Note that although this is currently only used for extended-remote,
5735 it is named remote_follow_fork in anticipation of using it for the
5736 remote target as well. */
5739 remote_target::follow_fork (int follow_child
, int detach_fork
)
5741 struct remote_state
*rs
= get_remote_state ();
5742 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5744 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5745 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5747 /* When following the parent and detaching the child, we detach
5748 the child here. For the case of following the child and
5749 detaching the parent, the detach is done in the target-
5750 independent follow fork code in infrun.c. We can't use
5751 target_detach when detaching an unfollowed child because
5752 the client side doesn't know anything about the child. */
5753 if (detach_fork
&& !follow_child
)
5755 /* Detach the fork child. */
5759 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5760 child_pid
= child_ptid
.pid ();
5762 remote_detach_pid (child_pid
);
5768 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5769 in the program space of the new inferior. On entry and at return the
5770 current inferior is the exec'ing inferior. INF is the new exec'd
5771 inferior, which may be the same as the exec'ing inferior unless
5772 follow-exec-mode is "new". */
5775 remote_target::follow_exec (struct inferior
*inf
, char *execd_pathname
)
5777 /* We know that this is a target file name, so if it has the "target:"
5778 prefix we strip it off before saving it in the program space. */
5779 if (is_target_filename (execd_pathname
))
5780 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5782 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5785 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5788 remote_target::disconnect (const char *args
, int from_tty
)
5791 error (_("Argument given to \"disconnect\" when remotely debugging."));
5793 /* Make sure we unpush even the extended remote targets. Calling
5794 target_mourn_inferior won't unpush, and remote_mourn won't
5795 unpush if there is more than one inferior left. */
5796 unpush_target (this);
5797 generic_mourn_inferior ();
5800 puts_filtered ("Ending remote debugging.\n");
5803 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5804 be chatty about it. */
5807 extended_remote_target::attach (const char *args
, int from_tty
)
5809 struct remote_state
*rs
= get_remote_state ();
5811 char *wait_status
= NULL
;
5813 pid
= parse_pid_to_attach (args
);
5815 /* Remote PID can be freely equal to getpid, do not check it here the same
5816 way as in other targets. */
5818 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5819 error (_("This target does not support attaching to a process"));
5823 char *exec_file
= get_exec_file (0);
5826 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5827 target_pid_to_str (ptid_t (pid
)));
5829 printf_unfiltered (_("Attaching to %s\n"),
5830 target_pid_to_str (ptid_t (pid
)));
5832 gdb_flush (gdb_stdout
);
5835 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5837 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5839 switch (packet_ok (rs
->buf
,
5840 &remote_protocol_packets
[PACKET_vAttach
]))
5843 if (!target_is_non_stop_p ())
5845 /* Save the reply for later. */
5846 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5847 strcpy (wait_status
, rs
->buf
);
5849 else if (strcmp (rs
->buf
, "OK") != 0)
5850 error (_("Attaching to %s failed with: %s"),
5851 target_pid_to_str (ptid_t (pid
)),
5854 case PACKET_UNKNOWN
:
5855 error (_("This target does not support attaching to a process"));
5857 error (_("Attaching to %s failed"),
5858 target_pid_to_str (ptid_t (pid
)));
5861 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5863 inferior_ptid
= ptid_t (pid
);
5865 if (target_is_non_stop_p ())
5867 struct thread_info
*thread
;
5869 /* Get list of threads. */
5870 update_thread_list ();
5872 thread
= first_thread_of_inferior (current_inferior ());
5874 inferior_ptid
= thread
->ptid
;
5876 inferior_ptid
= ptid_t (pid
);
5878 /* Invalidate our notion of the remote current thread. */
5879 record_currthread (rs
, minus_one_ptid
);
5883 /* Now, if we have thread information, update inferior_ptid. */
5884 inferior_ptid
= remote_current_thread (inferior_ptid
);
5886 /* Add the main thread to the thread list. */
5887 thread_info
*thr
= add_thread_silent (inferior_ptid
);
5888 /* Don't consider the thread stopped until we've processed the
5889 saved stop reply. */
5890 set_executing (thr
->ptid
, true);
5893 /* Next, if the target can specify a description, read it. We do
5894 this before anything involving memory or registers. */
5895 target_find_description ();
5897 if (!target_is_non_stop_p ())
5899 /* Use the previously fetched status. */
5900 gdb_assert (wait_status
!= NULL
);
5902 if (target_can_async_p ())
5904 struct notif_event
*reply
5905 = remote_notif_parse (this, ¬if_client_stop
, wait_status
);
5907 push_stop_reply ((struct stop_reply
*) reply
);
5913 gdb_assert (wait_status
!= NULL
);
5914 strcpy (rs
->buf
, wait_status
);
5915 rs
->cached_wait_status
= 1;
5919 gdb_assert (wait_status
== NULL
);
5922 /* Implementation of the to_post_attach method. */
5925 extended_remote_target::post_attach (int pid
)
5927 /* Get text, data & bss offsets. */
5930 /* In certain cases GDB might not have had the chance to start
5931 symbol lookup up until now. This could happen if the debugged
5932 binary is not using shared libraries, the vsyscall page is not
5933 present (on Linux) and the binary itself hadn't changed since the
5934 debugging process was started. */
5935 if (symfile_objfile
!= NULL
)
5936 remote_check_symbols();
5940 /* Check for the availability of vCont. This function should also check
5944 remote_target::remote_vcont_probe ()
5946 remote_state
*rs
= get_remote_state ();
5949 strcpy (rs
->buf
, "vCont?");
5951 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5954 /* Make sure that the features we assume are supported. */
5955 if (startswith (buf
, "vCont"))
5958 int support_c
, support_C
;
5960 rs
->supports_vCont
.s
= 0;
5961 rs
->supports_vCont
.S
= 0;
5964 rs
->supports_vCont
.t
= 0;
5965 rs
->supports_vCont
.r
= 0;
5966 while (p
&& *p
== ';')
5969 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5970 rs
->supports_vCont
.s
= 1;
5971 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5972 rs
->supports_vCont
.S
= 1;
5973 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5975 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5977 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5978 rs
->supports_vCont
.t
= 1;
5979 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5980 rs
->supports_vCont
.r
= 1;
5982 p
= strchr (p
, ';');
5985 /* If c, and C are not all supported, we can't use vCont. Clearing
5986 BUF will make packet_ok disable the packet. */
5987 if (!support_c
|| !support_C
)
5991 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5994 /* Helper function for building "vCont" resumptions. Write a
5995 resumption to P. ENDP points to one-passed-the-end of the buffer
5996 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5997 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5998 resumed thread should be single-stepped and/or signalled. If PTID
5999 equals minus_one_ptid, then all threads are resumed; if PTID
6000 represents a process, then all threads of the process are resumed;
6001 the thread to be stepped and/or signalled is given in the global
6005 remote_target::append_resumption (char *p
, char *endp
,
6006 ptid_t ptid
, int step
, gdb_signal siggnal
)
6008 struct remote_state
*rs
= get_remote_state ();
6010 if (step
&& siggnal
!= GDB_SIGNAL_0
)
6011 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
6013 /* GDB is willing to range step. */
6014 && use_range_stepping
6015 /* Target supports range stepping. */
6016 && rs
->supports_vCont
.r
6017 /* We don't currently support range stepping multiple
6018 threads with a wildcard (though the protocol allows it,
6019 so stubs shouldn't make an active effort to forbid
6021 && !(remote_multi_process_p (rs
) && ptid
.is_pid ()))
6023 struct thread_info
*tp
;
6025 if (ptid
== minus_one_ptid
)
6027 /* If we don't know about the target thread's tid, then
6028 we're resuming magic_null_ptid (see caller). */
6029 tp
= find_thread_ptid (magic_null_ptid
);
6032 tp
= find_thread_ptid (ptid
);
6033 gdb_assert (tp
!= NULL
);
6035 if (tp
->control
.may_range_step
)
6037 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
6039 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
6040 phex_nz (tp
->control
.step_range_start
,
6042 phex_nz (tp
->control
.step_range_end
,
6046 p
+= xsnprintf (p
, endp
- p
, ";s");
6049 p
+= xsnprintf (p
, endp
- p
, ";s");
6050 else if (siggnal
!= GDB_SIGNAL_0
)
6051 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
6053 p
+= xsnprintf (p
, endp
- p
, ";c");
6055 if (remote_multi_process_p (rs
) && ptid
.is_pid ())
6059 /* All (-1) threads of process. */
6060 nptid
= ptid_t (ptid
.pid (), -1, 0);
6062 p
+= xsnprintf (p
, endp
- p
, ":");
6063 p
= write_ptid (p
, endp
, nptid
);
6065 else if (ptid
!= minus_one_ptid
)
6067 p
+= xsnprintf (p
, endp
- p
, ":");
6068 p
= write_ptid (p
, endp
, ptid
);
6074 /* Clear the thread's private info on resume. */
6077 resume_clear_thread_private_info (struct thread_info
*thread
)
6079 if (thread
->priv
!= NULL
)
6081 remote_thread_info
*priv
= get_remote_thread_info (thread
);
6083 priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6084 priv
->watch_data_address
= 0;
6088 /* Append a vCont continue-with-signal action for threads that have a
6089 non-zero stop signal. */
6092 remote_target::append_pending_thread_resumptions (char *p
, char *endp
,
6095 for (thread_info
*thread
: all_non_exited_threads (ptid
))
6096 if (inferior_ptid
!= thread
->ptid
6097 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
6099 p
= append_resumption (p
, endp
, thread
->ptid
,
6100 0, thread
->suspend
.stop_signal
);
6101 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
6102 resume_clear_thread_private_info (thread
);
6108 /* Set the target running, using the packets that use Hc
6112 remote_target::remote_resume_with_hc (ptid_t ptid
, int step
,
6115 struct remote_state
*rs
= get_remote_state ();
6118 rs
->last_sent_signal
= siggnal
;
6119 rs
->last_sent_step
= step
;
6121 /* The c/s/C/S resume packets use Hc, so set the continue
6123 if (ptid
== minus_one_ptid
)
6124 set_continue_thread (any_thread_ptid
);
6126 set_continue_thread (ptid
);
6128 for (thread_info
*thread
: all_non_exited_threads ())
6129 resume_clear_thread_private_info (thread
);
6132 if (::execution_direction
== EXEC_REVERSE
)
6134 /* We don't pass signals to the target in reverse exec mode. */
6135 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
6136 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
6139 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
6140 error (_("Remote reverse-step not supported."));
6141 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
6142 error (_("Remote reverse-continue not supported."));
6144 strcpy (buf
, step
? "bs" : "bc");
6146 else if (siggnal
!= GDB_SIGNAL_0
)
6148 buf
[0] = step
? 'S' : 'C';
6149 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
6150 buf
[2] = tohex (((int) siggnal
) & 0xf);
6154 strcpy (buf
, step
? "s" : "c");
6159 /* Resume the remote inferior by using a "vCont" packet. The thread
6160 to be resumed is PTID; STEP and SIGGNAL indicate whether the
6161 resumed thread should be single-stepped and/or signalled. If PTID
6162 equals minus_one_ptid, then all threads are resumed; the thread to
6163 be stepped and/or signalled is given in the global INFERIOR_PTID.
6164 This function returns non-zero iff it resumes the inferior.
6166 This function issues a strict subset of all possible vCont commands
6170 remote_target::remote_resume_with_vcont (ptid_t ptid
, int step
,
6171 enum gdb_signal siggnal
)
6173 struct remote_state
*rs
= get_remote_state ();
6177 /* No reverse execution actions defined for vCont. */
6178 if (::execution_direction
== EXEC_REVERSE
)
6181 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6182 remote_vcont_probe ();
6184 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
6188 endp
= rs
->buf
+ get_remote_packet_size ();
6190 /* If we could generate a wider range of packets, we'd have to worry
6191 about overflowing BUF. Should there be a generic
6192 "multi-part-packet" packet? */
6194 p
+= xsnprintf (p
, endp
- p
, "vCont");
6196 if (ptid
== magic_null_ptid
)
6198 /* MAGIC_NULL_PTID means that we don't have any active threads,
6199 so we don't have any TID numbers the inferior will
6200 understand. Make sure to only send forms that do not specify
6202 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
6204 else if (ptid
== minus_one_ptid
|| ptid
.is_pid ())
6206 /* Resume all threads (of all processes, or of a single
6207 process), with preference for INFERIOR_PTID. This assumes
6208 inferior_ptid belongs to the set of all threads we are about
6210 if (step
|| siggnal
!= GDB_SIGNAL_0
)
6212 /* Step inferior_ptid, with or without signal. */
6213 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
6216 /* Also pass down any pending signaled resumption for other
6217 threads not the current. */
6218 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
6220 /* And continue others without a signal. */
6221 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
6225 /* Scheduler locking; resume only PTID. */
6226 append_resumption (p
, endp
, ptid
, step
, siggnal
);
6229 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
6232 if (target_is_non_stop_p ())
6234 /* In non-stop, the stub replies to vCont with "OK". The stop
6235 reply will be reported asynchronously by means of a `%Stop'
6237 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6238 if (strcmp (rs
->buf
, "OK") != 0)
6239 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
6245 /* Tell the remote machine to resume. */
6248 remote_target::resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
6250 struct remote_state
*rs
= get_remote_state ();
6252 /* When connected in non-stop mode, the core resumes threads
6253 individually. Resuming remote threads directly in target_resume
6254 would thus result in sending one packet per thread. Instead, to
6255 minimize roundtrip latency, here we just store the resume
6256 request; the actual remote resumption will be done in
6257 target_commit_resume / remote_commit_resume, where we'll be able
6258 to do vCont action coalescing. */
6259 if (target_is_non_stop_p () && ::execution_direction
!= EXEC_REVERSE
)
6261 remote_thread_info
*remote_thr
;
6263 if (minus_one_ptid
== ptid
|| ptid
.is_pid ())
6264 remote_thr
= get_remote_thread_info (inferior_ptid
);
6266 remote_thr
= get_remote_thread_info (ptid
);
6268 remote_thr
->last_resume_step
= step
;
6269 remote_thr
->last_resume_sig
= siggnal
;
6273 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
6274 (explained in remote-notif.c:handle_notification) so
6275 remote_notif_process is not called. We need find a place where
6276 it is safe to start a 'vNotif' sequence. It is good to do it
6277 before resuming inferior, because inferior was stopped and no RSP
6278 traffic at that moment. */
6279 if (!target_is_non_stop_p ())
6280 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
6282 rs
->last_resume_exec_dir
= ::execution_direction
;
6284 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
6285 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
6286 remote_resume_with_hc (ptid
, step
, siggnal
);
6288 /* We are about to start executing the inferior, let's register it
6289 with the event loop. NOTE: this is the one place where all the
6290 execution commands end up. We could alternatively do this in each
6291 of the execution commands in infcmd.c. */
6292 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
6293 into infcmd.c in order to allow inferior function calls to work
6294 NOT asynchronously. */
6295 if (target_can_async_p ())
6298 /* We've just told the target to resume. The remote server will
6299 wait for the inferior to stop, and then send a stop reply. In
6300 the mean time, we can't start another command/query ourselves
6301 because the stub wouldn't be ready to process it. This applies
6302 only to the base all-stop protocol, however. In non-stop (which
6303 only supports vCont), the stub replies with an "OK", and is
6304 immediate able to process further serial input. */
6305 if (!target_is_non_stop_p ())
6306 rs
->waiting_for_stop_reply
= 1;
6309 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
6311 /* Private per-inferior info for target remote processes. */
6313 struct remote_inferior
: public private_inferior
6315 /* Whether we can send a wildcard vCont for this process. */
6316 bool may_wildcard_vcont
= true;
6319 /* Get the remote private inferior data associated to INF. */
6321 static remote_inferior
*
6322 get_remote_inferior (inferior
*inf
)
6324 if (inf
->priv
== NULL
)
6325 inf
->priv
.reset (new remote_inferior
);
6327 return static_cast<remote_inferior
*> (inf
->priv
.get ());
6330 /* Class used to track the construction of a vCont packet in the
6331 outgoing packet buffer. This is used to send multiple vCont
6332 packets if we have more actions than would fit a single packet. */
6337 explicit vcont_builder (remote_target
*remote
)
6344 void push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
);
6349 /* The remote target. */
6350 remote_target
*m_remote
;
6352 /* Pointer to the first action. P points here if no action has been
6354 char *m_first_action
;
6356 /* Where the next action will be appended. */
6359 /* The end of the buffer. Must never write past this. */
6363 /* Prepare the outgoing buffer for a new vCont packet. */
6366 vcont_builder::restart ()
6368 struct remote_state
*rs
= m_remote
->get_remote_state ();
6371 m_endp
= rs
->buf
+ m_remote
->get_remote_packet_size ();
6372 m_p
+= xsnprintf (m_p
, m_endp
- m_p
, "vCont");
6373 m_first_action
= m_p
;
6376 /* If the vCont packet being built has any action, send it to the
6380 vcont_builder::flush ()
6382 struct remote_state
*rs
;
6384 if (m_p
== m_first_action
)
6387 rs
= m_remote
->get_remote_state ();
6388 m_remote
->putpkt (rs
->buf
);
6389 m_remote
->getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6390 if (strcmp (rs
->buf
, "OK") != 0)
6391 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
6394 /* The largest action is range-stepping, with its two addresses. This
6395 is more than sufficient. If a new, bigger action is created, it'll
6396 quickly trigger a failed assertion in append_resumption (and we'll
6398 #define MAX_ACTION_SIZE 200
6400 /* Append a new vCont action in the outgoing packet being built. If
6401 the action doesn't fit the packet along with previous actions, push
6402 what we've got so far to the remote end and start over a new vCont
6403 packet (with the new action). */
6406 vcont_builder::push_action (ptid_t ptid
, bool step
, gdb_signal siggnal
)
6408 char buf
[MAX_ACTION_SIZE
+ 1];
6410 char *endp
= m_remote
->append_resumption (buf
, buf
+ sizeof (buf
),
6411 ptid
, step
, siggnal
);
6413 /* Check whether this new action would fit in the vCont packet along
6414 with previous actions. If not, send what we've got so far and
6415 start a new vCont packet. */
6416 size_t rsize
= endp
- buf
;
6417 if (rsize
> m_endp
- m_p
)
6422 /* Should now fit. */
6423 gdb_assert (rsize
<= m_endp
- m_p
);
6426 memcpy (m_p
, buf
, rsize
);
6431 /* to_commit_resume implementation. */
6434 remote_target::commit_resume ()
6436 int any_process_wildcard
;
6437 int may_global_wildcard_vcont
;
6439 /* If connected in all-stop mode, we'd send the remote resume
6440 request directly from remote_resume. Likewise if
6441 reverse-debugging, as there are no defined vCont actions for
6442 reverse execution. */
6443 if (!target_is_non_stop_p () || ::execution_direction
== EXEC_REVERSE
)
6446 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
6447 instead of resuming all threads of each process individually.
6448 However, if any thread of a process must remain halted, we can't
6449 send wildcard resumes and must send one action per thread.
6451 Care must be taken to not resume threads/processes the server
6452 side already told us are stopped, but the core doesn't know about
6453 yet, because the events are still in the vStopped notification
6456 #1 => vCont s:p1.1;c
6458 #3 <= %Stopped T05 p1.1
6463 #8 (infrun handles the stop for p1.1 and continues stepping)
6464 #9 => vCont s:p1.1;c
6466 The last vCont above would resume thread p1.2 by mistake, because
6467 the server has no idea that the event for p1.2 had not been
6470 The server side must similarly ignore resume actions for the
6471 thread that has a pending %Stopped notification (and any other
6472 threads with events pending), until GDB acks the notification
6473 with vStopped. Otherwise, e.g., the following case is
6476 #1 => g (or any other packet)
6478 #3 <= %Stopped T05 p1.2
6479 #4 => vCont s:p1.1;c
6482 Above, the server must not resume thread p1.2. GDB can't know
6483 that p1.2 stopped until it acks the %Stopped notification, and
6484 since from GDB's perspective all threads should be running, it
6487 Finally, special care must also be given to handling fork/vfork
6488 events. A (v)fork event actually tells us that two processes
6489 stopped -- the parent and the child. Until we follow the fork,
6490 we must not resume the child. Therefore, if we have a pending
6491 fork follow, we must not send a global wildcard resume action
6492 (vCont;c). We can still send process-wide wildcards though. */
6494 /* Start by assuming a global wildcard (vCont;c) is possible. */
6495 may_global_wildcard_vcont
= 1;
6497 /* And assume every process is individually wildcard-able too. */
6498 for (inferior
*inf
: all_non_exited_inferiors ())
6500 remote_inferior
*priv
= get_remote_inferior (inf
);
6502 priv
->may_wildcard_vcont
= true;
6505 /* Check for any pending events (not reported or processed yet) and
6506 disable process and global wildcard resumes appropriately. */
6507 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
6509 for (thread_info
*tp
: all_non_exited_threads ())
6511 /* If a thread of a process is not meant to be resumed, then we
6512 can't wildcard that process. */
6515 get_remote_inferior (tp
->inf
)->may_wildcard_vcont
= false;
6517 /* And if we can't wildcard a process, we can't wildcard
6518 everything either. */
6519 may_global_wildcard_vcont
= 0;
6523 /* If a thread is the parent of an unfollowed fork, then we
6524 can't do a global wildcard, as that would resume the fork
6526 if (is_pending_fork_parent_thread (tp
))
6527 may_global_wildcard_vcont
= 0;
6530 /* Now let's build the vCont packet(s). Actions must be appended
6531 from narrower to wider scopes (thread -> process -> global). If
6532 we end up with too many actions for a single packet vcont_builder
6533 flushes the current vCont packet to the remote side and starts a
6535 struct vcont_builder
vcont_builder (this);
6537 /* Threads first. */
6538 for (thread_info
*tp
: all_non_exited_threads ())
6540 remote_thread_info
*remote_thr
= get_remote_thread_info (tp
);
6542 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
6545 gdb_assert (!thread_is_in_step_over_chain (tp
));
6547 if (!remote_thr
->last_resume_step
6548 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
6549 && get_remote_inferior (tp
->inf
)->may_wildcard_vcont
)
6551 /* We'll send a wildcard resume instead. */
6552 remote_thr
->vcont_resumed
= 1;
6556 vcont_builder
.push_action (tp
->ptid
,
6557 remote_thr
->last_resume_step
,
6558 remote_thr
->last_resume_sig
);
6559 remote_thr
->vcont_resumed
= 1;
6562 /* Now check whether we can send any process-wide wildcard. This is
6563 to avoid sending a global wildcard in the case nothing is
6564 supposed to be resumed. */
6565 any_process_wildcard
= 0;
6567 for (inferior
*inf
: all_non_exited_inferiors ())
6569 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6571 any_process_wildcard
= 1;
6576 if (any_process_wildcard
)
6578 /* If all processes are wildcard-able, then send a single "c"
6579 action, otherwise, send an "all (-1) threads of process"
6580 continue action for each running process, if any. */
6581 if (may_global_wildcard_vcont
)
6583 vcont_builder
.push_action (minus_one_ptid
,
6584 false, GDB_SIGNAL_0
);
6588 for (inferior
*inf
: all_non_exited_inferiors ())
6590 if (get_remote_inferior (inf
)->may_wildcard_vcont
)
6592 vcont_builder
.push_action (ptid_t (inf
->pid
),
6593 false, GDB_SIGNAL_0
);
6599 vcont_builder
.flush ();
6604 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6605 thread, all threads of a remote process, or all threads of all
6609 remote_target::remote_stop_ns (ptid_t ptid
)
6611 struct remote_state
*rs
= get_remote_state ();
6613 char *endp
= rs
->buf
+ get_remote_packet_size ();
6615 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6616 remote_vcont_probe ();
6618 if (!rs
->supports_vCont
.t
)
6619 error (_("Remote server does not support stopping threads"));
6621 if (ptid
== minus_one_ptid
6622 || (!remote_multi_process_p (rs
) && ptid
.is_pid ()))
6623 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6628 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6631 /* All (-1) threads of process. */
6632 nptid
= ptid_t (ptid
.pid (), -1, 0);
6635 /* Small optimization: if we already have a stop reply for
6636 this thread, no use in telling the stub we want this
6638 if (peek_stop_reply (ptid
))
6644 write_ptid (p
, endp
, nptid
);
6647 /* In non-stop, we get an immediate OK reply. The stop reply will
6648 come in asynchronously by notification. */
6650 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6651 if (strcmp (rs
->buf
, "OK") != 0)
6652 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6655 /* All-stop version of target_interrupt. Sends a break or a ^C to
6656 interrupt the remote target. It is undefined which thread of which
6657 process reports the interrupt. */
6660 remote_target::remote_interrupt_as ()
6662 struct remote_state
*rs
= get_remote_state ();
6664 rs
->ctrlc_pending_p
= 1;
6666 /* If the inferior is stopped already, but the core didn't know
6667 about it yet, just ignore the request. The cached wait status
6668 will be collected in remote_wait. */
6669 if (rs
->cached_wait_status
)
6672 /* Send interrupt_sequence to remote target. */
6673 send_interrupt_sequence ();
6676 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6677 the remote target. It is undefined which thread of which process
6678 reports the interrupt. Throws an error if the packet is not
6679 supported by the server. */
6682 remote_target::remote_interrupt_ns ()
6684 struct remote_state
*rs
= get_remote_state ();
6686 char *endp
= rs
->buf
+ get_remote_packet_size ();
6688 xsnprintf (p
, endp
- p
, "vCtrlC");
6690 /* In non-stop, we get an immediate OK reply. The stop reply will
6691 come in asynchronously by notification. */
6693 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6695 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6699 case PACKET_UNKNOWN
:
6700 error (_("No support for interrupting the remote target."));
6702 error (_("Interrupting target failed: %s"), rs
->buf
);
6706 /* Implement the to_stop function for the remote targets. */
6709 remote_target::stop (ptid_t ptid
)
6712 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6714 if (target_is_non_stop_p ())
6715 remote_stop_ns (ptid
);
6718 /* We don't currently have a way to transparently pause the
6719 remote target in all-stop mode. Interrupt it instead. */
6720 remote_interrupt_as ();
6724 /* Implement the to_interrupt function for the remote targets. */
6727 remote_target::interrupt ()
6730 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6732 if (target_is_non_stop_p ())
6733 remote_interrupt_ns ();
6735 remote_interrupt_as ();
6738 /* Implement the to_pass_ctrlc function for the remote targets. */
6741 remote_target::pass_ctrlc ()
6743 struct remote_state
*rs
= get_remote_state ();
6746 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6748 /* If we're starting up, we're not fully synced yet. Quit
6750 if (rs
->starting_up
)
6752 /* If ^C has already been sent once, offer to disconnect. */
6753 else if (rs
->ctrlc_pending_p
)
6756 target_interrupt ();
6759 /* Ask the user what to do when an interrupt is received. */
6762 remote_target::interrupt_query ()
6764 struct remote_state
*rs
= get_remote_state ();
6766 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6768 if (query (_("The target is not responding to interrupt requests.\n"
6769 "Stop debugging it? ")))
6771 remote_unpush_target ();
6772 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6777 if (query (_("Interrupted while waiting for the program.\n"
6778 "Give up waiting? ")))
6783 /* Enable/disable target terminal ownership. Most targets can use
6784 terminal groups to control terminal ownership. Remote targets are
6785 different in that explicit transfer of ownership to/from GDB/target
6789 remote_target::terminal_inferior ()
6791 /* NOTE: At this point we could also register our selves as the
6792 recipient of all input. Any characters typed could then be
6793 passed on down to the target. */
6797 remote_target::terminal_ours ()
6802 remote_console_output (char *msg
)
6806 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6809 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6813 fputs_unfiltered (tb
, gdb_stdtarg
);
6815 gdb_flush (gdb_stdtarg
);
6818 DEF_VEC_O(cached_reg_t
);
6820 typedef struct stop_reply
6822 struct notif_event base
;
6824 /* The identifier of the thread about this event */
6827 /* The remote state this event is associated with. When the remote
6828 connection, represented by a remote_state object, is closed,
6829 all the associated stop_reply events should be released. */
6830 struct remote_state
*rs
;
6832 struct target_waitstatus ws
;
6834 /* The architecture associated with the expedited registers. */
6837 /* Expedited registers. This makes remote debugging a bit more
6838 efficient for those targets that provide critical registers as
6839 part of their normal status mechanism (as another roundtrip to
6840 fetch them is avoided). */
6841 VEC(cached_reg_t
) *regcache
;
6843 enum target_stop_reason stop_reason
;
6845 CORE_ADDR watch_data_address
;
6851 stop_reply_xfree (struct stop_reply
*r
)
6853 notif_event_xfree ((struct notif_event
*) r
);
6856 /* Return the length of the stop reply queue. */
6859 remote_target::stop_reply_queue_length ()
6861 remote_state
*rs
= get_remote_state ();
6862 return rs
->stop_reply_queue
.size ();
6866 remote_notif_stop_parse (remote_target
*remote
,
6867 struct notif_client
*self
, char *buf
,
6868 struct notif_event
*event
)
6870 remote
->remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6874 remote_notif_stop_ack (remote_target
*remote
,
6875 struct notif_client
*self
, char *buf
,
6876 struct notif_event
*event
)
6878 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6881 putpkt (remote
, self
->ack_command
);
6883 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6885 /* We got an unknown stop reply. */
6886 error (_("Unknown stop reply"));
6889 remote
->push_stop_reply (stop_reply
);
6893 remote_notif_stop_can_get_pending_events (remote_target
*remote
,
6894 struct notif_client
*self
)
6896 /* We can't get pending events in remote_notif_process for
6897 notification stop, and we have to do this in remote_wait_ns
6898 instead. If we fetch all queued events from stub, remote stub
6899 may exit and we have no chance to process them back in
6901 remote_state
*rs
= remote
->get_remote_state ();
6902 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
6907 stop_reply_dtr (struct notif_event
*event
)
6909 struct stop_reply
*r
= (struct stop_reply
*) event
;
6914 VEC_iterate (cached_reg_t
, r
->regcache
, ix
, reg
);
6918 VEC_free (cached_reg_t
, r
->regcache
);
6921 static struct notif_event
*
6922 remote_notif_stop_alloc_reply (void)
6924 /* We cast to a pointer to the "base class". */
6925 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6927 r
->dtr
= stop_reply_dtr
;
6932 /* A client of notification Stop. */
6934 struct notif_client notif_client_stop
=
6938 remote_notif_stop_parse
,
6939 remote_notif_stop_ack
,
6940 remote_notif_stop_can_get_pending_events
,
6941 remote_notif_stop_alloc_reply
,
6945 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6946 the pid of the process that owns the threads we want to check, or
6947 -1 if we want to check all threads. */
6950 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6953 if (ws
->kind
== TARGET_WAITKIND_FORKED
6954 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6956 if (event_pid
== -1 || event_pid
== thread_ptid
.pid ())
6963 /* Return the thread's pending status used to determine whether the
6964 thread is a fork parent stopped at a fork event. */
6966 static struct target_waitstatus
*
6967 thread_pending_fork_status (struct thread_info
*thread
)
6969 if (thread
->suspend
.waitstatus_pending_p
)
6970 return &thread
->suspend
.waitstatus
;
6972 return &thread
->pending_follow
;
6975 /* Determine if THREAD is a pending fork parent thread. */
6978 is_pending_fork_parent_thread (struct thread_info
*thread
)
6980 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6983 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6986 /* If CONTEXT contains any fork child threads that have not been
6987 reported yet, remove them from the CONTEXT list. If such a
6988 thread exists it is because we are stopped at a fork catchpoint
6989 and have not yet called follow_fork, which will set up the
6990 host-side data structures for the new process. */
6993 remote_target::remove_new_fork_children (threads_listing_context
*context
)
6996 struct notif_client
*notif
= ¬if_client_stop
;
6998 /* For any threads stopped at a fork event, remove the corresponding
6999 fork child threads from the CONTEXT list. */
7000 for (thread_info
*thread
: all_non_exited_threads ())
7002 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
7004 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
7005 context
->remove_thread (ws
->value
.related_pid
);
7008 /* Check for any pending fork events (not reported or processed yet)
7009 in process PID and remove those fork child threads from the
7010 CONTEXT list as well. */
7011 remote_notif_get_pending_events (notif
);
7012 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7013 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7014 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
7015 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
7016 context
->remove_thread (event
->ws
.value
.related_pid
);
7019 /* Check whether any event pending in the vStopped queue would prevent
7020 a global or process wildcard vCont action. Clear
7021 *may_global_wildcard if we can't do a global wildcard (vCont;c),
7022 and clear the event inferior's may_wildcard_vcont flag if we can't
7023 do a process-wide wildcard resume (vCont;c:pPID.-1). */
7026 remote_target::check_pending_events_prevent_wildcard_vcont
7027 (int *may_global_wildcard
)
7029 struct notif_client
*notif
= ¬if_client_stop
;
7031 remote_notif_get_pending_events (notif
);
7032 for (auto &event
: get_remote_state ()->stop_reply_queue
)
7034 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
7035 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
7038 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
7039 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
7040 *may_global_wildcard
= 0;
7042 struct inferior
*inf
= find_inferior_ptid (event
->ptid
);
7044 /* This may be the first time we heard about this process.
7045 Regardless, we must not do a global wildcard resume, otherwise
7046 we'd resume this process too. */
7047 *may_global_wildcard
= 0;
7049 get_remote_inferior (inf
)->may_wildcard_vcont
= false;
7053 /* Discard all pending stop replies of inferior INF. */
7056 remote_target::discard_pending_stop_replies (struct inferior
*inf
)
7058 struct stop_reply
*reply
;
7059 struct remote_state
*rs
= get_remote_state ();
7060 struct remote_notif_state
*rns
= rs
->notif_state
;
7062 /* This function can be notified when an inferior exists. When the
7063 target is not remote, the notification state is NULL. */
7064 if (rs
->remote_desc
== NULL
)
7067 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
7069 /* Discard the in-flight notification. */
7070 if (reply
!= NULL
&& reply
->ptid
.pid () == inf
->pid
)
7072 stop_reply_xfree (reply
);
7073 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
7076 /* Discard the stop replies we have already pulled with
7078 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7079 rs
->stop_reply_queue
.end (),
7080 [=] (const stop_reply_up
&event
)
7082 return event
->ptid
.pid () == inf
->pid
;
7084 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7087 /* Discard the stop replies for RS in stop_reply_queue. */
7090 remote_target::discard_pending_stop_replies_in_queue ()
7092 remote_state
*rs
= get_remote_state ();
7094 /* Discard the stop replies we have already pulled with
7096 auto iter
= std::remove_if (rs
->stop_reply_queue
.begin (),
7097 rs
->stop_reply_queue
.end (),
7098 [=] (const stop_reply_up
&event
)
7100 return event
->rs
== rs
;
7102 rs
->stop_reply_queue
.erase (iter
, rs
->stop_reply_queue
.end ());
7105 /* Remove the first reply in 'stop_reply_queue' which matches
7109 remote_target::remote_notif_remove_queued_reply (ptid_t ptid
)
7111 remote_state
*rs
= get_remote_state ();
7113 auto iter
= std::find_if (rs
->stop_reply_queue
.begin (),
7114 rs
->stop_reply_queue
.end (),
7115 [=] (const stop_reply_up
&event
)
7117 return event
->ptid
.matches (ptid
);
7119 struct stop_reply
*result
;
7120 if (iter
== rs
->stop_reply_queue
.end ())
7124 result
= iter
->release ();
7125 rs
->stop_reply_queue
.erase (iter
);
7129 fprintf_unfiltered (gdb_stdlog
,
7130 "notif: discard queued event: 'Stop' in %s\n",
7131 target_pid_to_str (ptid
));
7136 /* Look for a queued stop reply belonging to PTID. If one is found,
7137 remove it from the queue, and return it. Returns NULL if none is
7138 found. If there are still queued events left to process, tell the
7139 event loop to get back to target_wait soon. */
7142 remote_target::queued_stop_reply (ptid_t ptid
)
7144 remote_state
*rs
= get_remote_state ();
7145 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
7147 if (!rs
->stop_reply_queue
.empty ())
7149 /* There's still at least an event left. */
7150 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7156 /* Push a fully parsed stop reply in the stop reply queue. Since we
7157 know that we now have at least one queued event left to pass to the
7158 core side, tell the event loop to get back to target_wait soon. */
7161 remote_target::push_stop_reply (struct stop_reply
*new_event
)
7163 remote_state
*rs
= get_remote_state ();
7164 rs
->stop_reply_queue
.push_back (stop_reply_up (new_event
));
7167 fprintf_unfiltered (gdb_stdlog
,
7168 "notif: push 'Stop' %s to queue %d\n",
7169 target_pid_to_str (new_event
->ptid
),
7170 int (rs
->stop_reply_queue
.size ()));
7172 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7175 /* Returns true if we have a stop reply for PTID. */
7178 remote_target::peek_stop_reply (ptid_t ptid
)
7180 remote_state
*rs
= get_remote_state ();
7181 for (auto &event
: rs
->stop_reply_queue
)
7182 if (ptid
== event
->ptid
7183 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
)
7188 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
7189 starting with P and ending with PEND matches PREFIX. */
7192 strprefix (const char *p
, const char *pend
, const char *prefix
)
7194 for ( ; p
< pend
; p
++, prefix
++)
7197 return *prefix
== '\0';
7200 /* Parse the stop reply in BUF. Either the function succeeds, and the
7201 result is stored in EVENT, or throws an error. */
7204 remote_target::remote_parse_stop_reply (char *buf
, stop_reply
*event
)
7206 remote_arch_state
*rsa
= NULL
;
7211 event
->ptid
= null_ptid
;
7212 event
->rs
= get_remote_state ();
7213 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
7214 event
->ws
.value
.integer
= 0;
7215 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
7216 event
->regcache
= NULL
;
7221 case 'T': /* Status with PC, SP, FP, ... */
7222 /* Expedited reply, containing Signal, {regno, reg} repeat. */
7223 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
7225 n... = register number
7226 r... = register contents
7229 p
= &buf
[3]; /* after Txx */
7235 p1
= strchr (p
, ':');
7237 error (_("Malformed packet(a) (missing colon): %s\n\
7241 error (_("Malformed packet(a) (missing register number): %s\n\
7245 /* Some "registers" are actually extended stop information.
7246 Note if you're adding a new entry here: GDB 7.9 and
7247 earlier assume that all register "numbers" that start
7248 with an hex digit are real register numbers. Make sure
7249 the server only sends such a packet if it knows the
7250 client understands it. */
7252 if (strprefix (p
, p1
, "thread"))
7253 event
->ptid
= read_ptid (++p1
, &p
);
7254 else if (strprefix (p
, p1
, "syscall_entry"))
7258 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
7259 p
= unpack_varlen_hex (++p1
, &sysno
);
7260 event
->ws
.value
.syscall_number
= (int) sysno
;
7262 else if (strprefix (p
, p1
, "syscall_return"))
7266 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
7267 p
= unpack_varlen_hex (++p1
, &sysno
);
7268 event
->ws
.value
.syscall_number
= (int) sysno
;
7270 else if (strprefix (p
, p1
, "watch")
7271 || strprefix (p
, p1
, "rwatch")
7272 || strprefix (p
, p1
, "awatch"))
7274 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
7275 p
= unpack_varlen_hex (++p1
, &addr
);
7276 event
->watch_data_address
= (CORE_ADDR
) addr
;
7278 else if (strprefix (p
, p1
, "swbreak"))
7280 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
7282 /* Make sure the stub doesn't forget to indicate support
7284 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
7285 error (_("Unexpected swbreak stop reason"));
7287 /* The value part is documented as "must be empty",
7288 though we ignore it, in case we ever decide to make
7289 use of it in a backward compatible way. */
7290 p
= strchrnul (p1
+ 1, ';');
7292 else if (strprefix (p
, p1
, "hwbreak"))
7294 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
7296 /* Make sure the stub doesn't forget to indicate support
7298 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
7299 error (_("Unexpected hwbreak stop reason"));
7302 p
= strchrnul (p1
+ 1, ';');
7304 else if (strprefix (p
, p1
, "library"))
7306 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
7307 p
= strchrnul (p1
+ 1, ';');
7309 else if (strprefix (p
, p1
, "replaylog"))
7311 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
7312 /* p1 will indicate "begin" or "end", but it makes
7313 no difference for now, so ignore it. */
7314 p
= strchrnul (p1
+ 1, ';');
7316 else if (strprefix (p
, p1
, "core"))
7320 p
= unpack_varlen_hex (++p1
, &c
);
7323 else if (strprefix (p
, p1
, "fork"))
7325 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7326 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
7328 else if (strprefix (p
, p1
, "vfork"))
7330 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
7331 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
7333 else if (strprefix (p
, p1
, "vforkdone"))
7335 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
7336 p
= strchrnul (p1
+ 1, ';');
7338 else if (strprefix (p
, p1
, "exec"))
7341 char pathname
[PATH_MAX
];
7344 /* Determine the length of the execd pathname. */
7345 p
= unpack_varlen_hex (++p1
, &ignored
);
7346 pathlen
= (p
- p1
) / 2;
7348 /* Save the pathname for event reporting and for
7349 the next run command. */
7350 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
7351 pathname
[pathlen
] = '\0';
7353 /* This is freed during event handling. */
7354 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
7355 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
7357 /* Skip the registers included in this packet, since
7358 they may be for an architecture different from the
7359 one used by the original program. */
7362 else if (strprefix (p
, p1
, "create"))
7364 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
7365 p
= strchrnul (p1
+ 1, ';');
7374 p
= strchrnul (p1
+ 1, ';');
7379 /* Maybe a real ``P'' register number. */
7380 p_temp
= unpack_varlen_hex (p
, &pnum
);
7381 /* If the first invalid character is the colon, we got a
7382 register number. Otherwise, it's an unknown stop
7386 /* If we haven't parsed the event's thread yet, find
7387 it now, in order to find the architecture of the
7388 reported expedited registers. */
7389 if (event
->ptid
== null_ptid
)
7391 const char *thr
= strstr (p1
+ 1, ";thread:");
7393 event
->ptid
= read_ptid (thr
+ strlen (";thread:"),
7397 /* Either the current thread hasn't changed,
7398 or the inferior is not multi-threaded.
7399 The event must be for the thread we last
7400 set as (or learned as being) current. */
7401 event
->ptid
= event
->rs
->general_thread
;
7407 inferior
*inf
= (event
->ptid
== null_ptid
7409 : find_inferior_ptid (event
->ptid
));
7410 /* If this is the first time we learn anything
7411 about this process, skip the registers
7412 included in this packet, since we don't yet
7413 know which architecture to use to parse them.
7414 We'll determine the architecture later when
7415 we process the stop reply and retrieve the
7416 target description, via
7417 remote_notice_new_inferior ->
7418 post_create_inferior. */
7421 p
= strchrnul (p1
+ 1, ';');
7426 event
->arch
= inf
->gdbarch
;
7427 rsa
= event
->rs
->get_remote_arch_state (event
->arch
);
7431 = packet_reg_from_pnum (event
->arch
, rsa
, pnum
);
7432 cached_reg_t cached_reg
;
7435 error (_("Remote sent bad register number %s: %s\n\
7437 hex_string (pnum
), p
, buf
);
7439 cached_reg
.num
= reg
->regnum
;
7440 cached_reg
.data
= (gdb_byte
*)
7441 xmalloc (register_size (event
->arch
, reg
->regnum
));
7444 fieldsize
= hex2bin (p
, cached_reg
.data
,
7445 register_size (event
->arch
, reg
->regnum
));
7447 if (fieldsize
< register_size (event
->arch
, reg
->regnum
))
7448 warning (_("Remote reply is too short: %s"), buf
);
7450 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
7454 /* Not a number. Silently skip unknown optional
7456 p
= strchrnul (p1
+ 1, ';');
7461 error (_("Remote register badly formatted: %s\nhere: %s"),
7466 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7470 case 'S': /* Old style status, just signal only. */
7474 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7475 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7476 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7477 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7479 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7482 case 'w': /* Thread exited. */
7486 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7487 p
= unpack_varlen_hex (&buf
[1], &value
);
7488 event
->ws
.value
.integer
= value
;
7490 error (_("stop reply packet badly formatted: %s"), buf
);
7491 event
->ptid
= read_ptid (++p
, NULL
);
7494 case 'W': /* Target exited. */
7500 /* GDB used to accept only 2 hex chars here. Stubs should
7501 only send more if they detect GDB supports multi-process
7503 p
= unpack_varlen_hex (&buf
[1], &value
);
7507 /* The remote process exited. */
7508 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7509 event
->ws
.value
.integer
= value
;
7513 /* The remote process exited with a signal. */
7514 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7515 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7516 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7518 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7521 /* If no process is specified, assume inferior_ptid. */
7522 pid
= inferior_ptid
.pid ();
7531 else if (startswith (p
, "process:"))
7535 p
+= sizeof ("process:") - 1;
7536 unpack_varlen_hex (p
, &upid
);
7540 error (_("unknown stop reply packet: %s"), buf
);
7543 error (_("unknown stop reply packet: %s"), buf
);
7544 event
->ptid
= ptid_t (pid
);
7548 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7549 event
->ptid
= minus_one_ptid
;
7553 if (target_is_non_stop_p () && event
->ptid
== null_ptid
)
7554 error (_("No process or thread specified in stop reply: %s"), buf
);
7557 /* When the stub wants to tell GDB about a new notification reply, it
7558 sends a notification (%Stop, for example). Those can come it at
7559 any time, hence, we have to make sure that any pending
7560 putpkt/getpkt sequence we're making is finished, before querying
7561 the stub for more events with the corresponding ack command
7562 (vStopped, for example). E.g., if we started a vStopped sequence
7563 immediately upon receiving the notification, something like this
7571 1.6) <-- (registers reply to step #1.3)
7573 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7576 To solve this, whenever we parse a %Stop notification successfully,
7577 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7578 doing whatever we were doing:
7584 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7585 2.5) <-- (registers reply to step #2.3)
7587 Eventualy after step #2.5, we return to the event loop, which
7588 notices there's an event on the
7589 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7590 associated callback --- the function below. At this point, we're
7591 always safe to start a vStopped sequence. :
7594 2.7) <-- T05 thread:2
7600 remote_target::remote_notif_get_pending_events (notif_client
*nc
)
7602 struct remote_state
*rs
= get_remote_state ();
7604 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7607 fprintf_unfiltered (gdb_stdlog
,
7608 "notif: process: '%s' ack pending event\n",
7612 nc
->ack (this, nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7613 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7617 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7618 if (strcmp (rs
->buf
, "OK") == 0)
7621 remote_notif_ack (this, nc
, rs
->buf
);
7627 fprintf_unfiltered (gdb_stdlog
,
7628 "notif: process: '%s' no pending reply\n",
7633 /* Wrapper around remote_target::remote_notif_get_pending_events to
7634 avoid having to export the whole remote_target class. */
7637 remote_notif_get_pending_events (remote_target
*remote
, notif_client
*nc
)
7639 remote
->remote_notif_get_pending_events (nc
);
7642 /* Called when it is decided that STOP_REPLY holds the info of the
7643 event that is to be returned to the core. This function always
7644 destroys STOP_REPLY. */
7647 remote_target::process_stop_reply (struct stop_reply
*stop_reply
,
7648 struct target_waitstatus
*status
)
7652 *status
= stop_reply
->ws
;
7653 ptid
= stop_reply
->ptid
;
7655 /* If no thread/process was reported by the stub, assume the current
7657 if (ptid
== null_ptid
)
7658 ptid
= inferior_ptid
;
7660 if (status
->kind
!= TARGET_WAITKIND_EXITED
7661 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7662 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7664 /* Expedited registers. */
7665 if (stop_reply
->regcache
)
7667 struct regcache
*regcache
7668 = get_thread_arch_regcache (ptid
, stop_reply
->arch
);
7673 VEC_iterate (cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7676 regcache
->raw_supply (reg
->num
, reg
->data
);
7680 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7683 remote_notice_new_inferior (ptid
, 0);
7684 remote_thread_info
*remote_thr
= get_remote_thread_info (ptid
);
7685 remote_thr
->core
= stop_reply
->core
;
7686 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7687 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7688 remote_thr
->vcont_resumed
= 0;
7691 stop_reply_xfree (stop_reply
);
7695 /* The non-stop mode version of target_wait. */
7698 remote_target::wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7700 struct remote_state
*rs
= get_remote_state ();
7701 struct stop_reply
*stop_reply
;
7705 /* If in non-stop mode, get out of getpkt even if a
7706 notification is received. */
7708 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7709 0 /* forever */, &is_notif
);
7712 if (ret
!= -1 && !is_notif
)
7715 case 'E': /* Error of some sort. */
7716 /* We're out of sync with the target now. Did it continue
7717 or not? We can't tell which thread it was in non-stop,
7718 so just ignore this. */
7719 warning (_("Remote failure reply: %s"), rs
->buf
);
7721 case 'O': /* Console output. */
7722 remote_console_output (rs
->buf
+ 1);
7725 warning (_("Invalid remote reply: %s"), rs
->buf
);
7729 /* Acknowledge a pending stop reply that may have arrived in the
7731 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7732 remote_notif_get_pending_events (¬if_client_stop
);
7734 /* If indeed we noticed a stop reply, we're done. */
7735 stop_reply
= queued_stop_reply (ptid
);
7736 if (stop_reply
!= NULL
)
7737 return process_stop_reply (stop_reply
, status
);
7739 /* Still no event. If we're just polling for an event, then
7740 return to the event loop. */
7741 if (options
& TARGET_WNOHANG
)
7743 status
->kind
= TARGET_WAITKIND_IGNORE
;
7744 return minus_one_ptid
;
7747 /* Otherwise do a blocking wait. */
7748 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7749 1 /* forever */, &is_notif
);
7753 /* Wait until the remote machine stops, then return, storing status in
7754 STATUS just as `wait' would. */
7757 remote_target::wait_as (ptid_t ptid
, target_waitstatus
*status
, int options
)
7759 struct remote_state
*rs
= get_remote_state ();
7760 ptid_t event_ptid
= null_ptid
;
7762 struct stop_reply
*stop_reply
;
7766 status
->kind
= TARGET_WAITKIND_IGNORE
;
7767 status
->value
.integer
= 0;
7769 stop_reply
= queued_stop_reply (ptid
);
7770 if (stop_reply
!= NULL
)
7771 return process_stop_reply (stop_reply
, status
);
7773 if (rs
->cached_wait_status
)
7774 /* Use the cached wait status, but only once. */
7775 rs
->cached_wait_status
= 0;
7780 int forever
= ((options
& TARGET_WNOHANG
) == 0
7781 && rs
->wait_forever_enabled_p
);
7783 if (!rs
->waiting_for_stop_reply
)
7785 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7786 return minus_one_ptid
;
7789 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7790 _never_ wait for ever -> test on target_is_async_p().
7791 However, before we do that we need to ensure that the caller
7792 knows how to take the target into/out of async mode. */
7793 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7794 forever
, &is_notif
);
7796 /* GDB gets a notification. Return to core as this event is
7798 if (ret
!= -1 && is_notif
)
7799 return minus_one_ptid
;
7801 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7802 return minus_one_ptid
;
7807 /* Assume that the target has acknowledged Ctrl-C unless we receive
7808 an 'F' or 'O' packet. */
7809 if (buf
[0] != 'F' && buf
[0] != 'O')
7810 rs
->ctrlc_pending_p
= 0;
7814 case 'E': /* Error of some sort. */
7815 /* We're out of sync with the target now. Did it continue or
7816 not? Not is more likely, so report a stop. */
7817 rs
->waiting_for_stop_reply
= 0;
7819 warning (_("Remote failure reply: %s"), buf
);
7820 status
->kind
= TARGET_WAITKIND_STOPPED
;
7821 status
->value
.sig
= GDB_SIGNAL_0
;
7823 case 'F': /* File-I/O request. */
7824 /* GDB may access the inferior memory while handling the File-I/O
7825 request, but we don't want GDB accessing memory while waiting
7826 for a stop reply. See the comments in putpkt_binary. Set
7827 waiting_for_stop_reply to 0 temporarily. */
7828 rs
->waiting_for_stop_reply
= 0;
7829 remote_fileio_request (this, buf
, rs
->ctrlc_pending_p
);
7830 rs
->ctrlc_pending_p
= 0;
7831 /* GDB handled the File-I/O request, and the target is running
7832 again. Keep waiting for events. */
7833 rs
->waiting_for_stop_reply
= 1;
7835 case 'N': case 'T': case 'S': case 'X': case 'W':
7837 /* There is a stop reply to handle. */
7838 rs
->waiting_for_stop_reply
= 0;
7841 = (struct stop_reply
*) remote_notif_parse (this,
7845 event_ptid
= process_stop_reply (stop_reply
, status
);
7848 case 'O': /* Console output. */
7849 remote_console_output (buf
+ 1);
7852 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7854 /* Zero length reply means that we tried 'S' or 'C' and the
7855 remote system doesn't support it. */
7856 target_terminal::ours_for_output ();
7858 ("Can't send signals to this remote system. %s not sent.\n",
7859 gdb_signal_to_name (rs
->last_sent_signal
));
7860 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7861 target_terminal::inferior ();
7863 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7869 warning (_("Invalid remote reply: %s"), buf
);
7873 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7874 return minus_one_ptid
;
7875 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7877 /* Nothing interesting happened. If we're doing a non-blocking
7878 poll, we're done. Otherwise, go back to waiting. */
7879 if (options
& TARGET_WNOHANG
)
7880 return minus_one_ptid
;
7884 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7885 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7887 if (event_ptid
!= null_ptid
)
7888 record_currthread (rs
, event_ptid
);
7890 event_ptid
= inferior_ptid
;
7893 /* A process exit. Invalidate our notion of current thread. */
7894 record_currthread (rs
, minus_one_ptid
);
7899 /* Wait until the remote machine stops, then return, storing status in
7900 STATUS just as `wait' would. */
7903 remote_target::wait (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7907 if (target_is_non_stop_p ())
7908 event_ptid
= wait_ns (ptid
, status
, options
);
7910 event_ptid
= wait_as (ptid
, status
, options
);
7912 if (target_is_async_p ())
7914 remote_state
*rs
= get_remote_state ();
7916 /* If there are are events left in the queue tell the event loop
7918 if (!rs
->stop_reply_queue
.empty ())
7919 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
7925 /* Fetch a single register using a 'p' packet. */
7928 remote_target::fetch_register_using_p (struct regcache
*regcache
,
7931 struct gdbarch
*gdbarch
= regcache
->arch ();
7932 struct remote_state
*rs
= get_remote_state ();
7934 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
7937 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7940 if (reg
->pnum
== -1)
7945 p
+= hexnumstr (p
, reg
->pnum
);
7948 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7952 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7956 case PACKET_UNKNOWN
:
7959 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7960 gdbarch_register_name (regcache
->arch (),
7965 /* If this register is unfetchable, tell the regcache. */
7968 regcache
->raw_supply (reg
->regnum
, NULL
);
7972 /* Otherwise, parse and supply the value. */
7978 error (_("fetch_register_using_p: early buf termination"));
7980 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7983 regcache
->raw_supply (reg
->regnum
, regp
);
7987 /* Fetch the registers included in the target's 'g' packet. */
7990 remote_target::send_g_packet ()
7992 struct remote_state
*rs
= get_remote_state ();
7995 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7997 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7998 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7999 error (_("Could not read registers; remote failure reply '%s'"),
8002 /* We can get out of synch in various cases. If the first character
8003 in the buffer is not a hex character, assume that has happened
8004 and try to fetch another packet to read. */
8005 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
8006 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
8007 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
8008 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
8011 fprintf_unfiltered (gdb_stdlog
,
8012 "Bad register packet; fetching a new packet\n");
8013 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8016 buf_len
= strlen (rs
->buf
);
8018 /* Sanity check the received packet. */
8019 if (buf_len
% 2 != 0)
8020 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
8026 remote_target::process_g_packet (struct regcache
*regcache
)
8028 struct gdbarch
*gdbarch
= regcache
->arch ();
8029 struct remote_state
*rs
= get_remote_state ();
8030 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8035 buf_len
= strlen (rs
->buf
);
8037 /* Further sanity checks, with knowledge of the architecture. */
8038 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
8039 error (_("Remote 'g' packet reply is too long (expected %ld bytes, got %d "
8040 "bytes): %s"), rsa
->sizeof_g_packet
, buf_len
/ 2, rs
->buf
);
8042 /* Save the size of the packet sent to us by the target. It is used
8043 as a heuristic when determining the max size of packets that the
8044 target can safely receive. */
8045 if (rsa
->actual_register_packet_size
== 0)
8046 rsa
->actual_register_packet_size
= buf_len
;
8048 /* If this is smaller than we guessed the 'g' packet would be,
8049 update our records. A 'g' reply that doesn't include a register's
8050 value implies either that the register is not available, or that
8051 the 'p' packet must be used. */
8052 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
8054 long sizeof_g_packet
= buf_len
/ 2;
8056 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8058 long offset
= rsa
->regs
[i
].offset
;
8059 long reg_size
= register_size (gdbarch
, i
);
8061 if (rsa
->regs
[i
].pnum
== -1)
8064 if (offset
>= sizeof_g_packet
)
8065 rsa
->regs
[i
].in_g_packet
= 0;
8066 else if (offset
+ reg_size
> sizeof_g_packet
)
8067 error (_("Truncated register %d in remote 'g' packet"), i
);
8069 rsa
->regs
[i
].in_g_packet
= 1;
8072 /* Looks valid enough, we can assume this is the correct length
8073 for a 'g' packet. It's important not to adjust
8074 rsa->sizeof_g_packet if we have truncated registers otherwise
8075 this "if" won't be run the next time the method is called
8076 with a packet of the same size and one of the internal errors
8077 below will trigger instead. */
8078 rsa
->sizeof_g_packet
= sizeof_g_packet
;
8081 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
8083 /* Unimplemented registers read as all bits zero. */
8084 memset (regs
, 0, rsa
->sizeof_g_packet
);
8086 /* Reply describes registers byte by byte, each byte encoded as two
8087 hex characters. Suck them all up, then supply them to the
8088 register cacheing/storage mechanism. */
8091 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
8093 if (p
[0] == 0 || p
[1] == 0)
8094 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
8095 internal_error (__FILE__
, __LINE__
,
8096 _("unexpected end of 'g' packet reply"));
8098 if (p
[0] == 'x' && p
[1] == 'x')
8099 regs
[i
] = 0; /* 'x' */
8101 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
8105 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8107 struct packet_reg
*r
= &rsa
->regs
[i
];
8108 long reg_size
= register_size (gdbarch
, i
);
8112 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
8113 /* This shouldn't happen - we adjusted in_g_packet above. */
8114 internal_error (__FILE__
, __LINE__
,
8115 _("unexpected end of 'g' packet reply"));
8116 else if (rs
->buf
[r
->offset
* 2] == 'x')
8118 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
8119 /* The register isn't available, mark it as such (at
8120 the same time setting the value to zero). */
8121 regcache
->raw_supply (r
->regnum
, NULL
);
8124 regcache
->raw_supply (r
->regnum
, regs
+ r
->offset
);
8130 remote_target::fetch_registers_using_g (struct regcache
*regcache
)
8133 process_g_packet (regcache
);
8136 /* Make the remote selected traceframe match GDB's selected
8140 remote_target::set_remote_traceframe ()
8143 struct remote_state
*rs
= get_remote_state ();
8145 if (rs
->remote_traceframe_number
== get_traceframe_number ())
8148 /* Avoid recursion, remote_trace_find calls us again. */
8149 rs
->remote_traceframe_number
= get_traceframe_number ();
8151 newnum
= target_trace_find (tfind_number
,
8152 get_traceframe_number (), 0, 0, NULL
);
8154 /* Should not happen. If it does, all bets are off. */
8155 if (newnum
!= get_traceframe_number ())
8156 warning (_("could not set remote traceframe"));
8160 remote_target::fetch_registers (struct regcache
*regcache
, int regnum
)
8162 struct gdbarch
*gdbarch
= regcache
->arch ();
8163 struct remote_state
*rs
= get_remote_state ();
8164 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8167 set_remote_traceframe ();
8168 set_general_thread (regcache
->ptid ());
8172 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8174 gdb_assert (reg
!= NULL
);
8176 /* If this register might be in the 'g' packet, try that first -
8177 we are likely to read more than one register. If this is the
8178 first 'g' packet, we might be overly optimistic about its
8179 contents, so fall back to 'p'. */
8180 if (reg
->in_g_packet
)
8182 fetch_registers_using_g (regcache
);
8183 if (reg
->in_g_packet
)
8187 if (fetch_register_using_p (regcache
, reg
))
8190 /* This register is not available. */
8191 regcache
->raw_supply (reg
->regnum
, NULL
);
8196 fetch_registers_using_g (regcache
);
8198 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8199 if (!rsa
->regs
[i
].in_g_packet
)
8200 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
8202 /* This register is not available. */
8203 regcache
->raw_supply (i
, NULL
);
8207 /* Prepare to store registers. Since we may send them all (using a
8208 'G' request), we have to read out the ones we don't want to change
8212 remote_target::prepare_to_store (struct regcache
*regcache
)
8214 struct remote_state
*rs
= get_remote_state ();
8215 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8218 /* Make sure the entire registers array is valid. */
8219 switch (packet_support (PACKET_P
))
8221 case PACKET_DISABLE
:
8222 case PACKET_SUPPORT_UNKNOWN
:
8223 /* Make sure all the necessary registers are cached. */
8224 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8225 if (rsa
->regs
[i
].in_g_packet
)
8226 regcache
->raw_update (rsa
->regs
[i
].regnum
);
8233 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
8234 packet was not recognized. */
8237 remote_target::store_register_using_P (const struct regcache
*regcache
,
8240 struct gdbarch
*gdbarch
= regcache
->arch ();
8241 struct remote_state
*rs
= get_remote_state ();
8242 /* Try storing a single register. */
8243 char *buf
= rs
->buf
;
8244 gdb_byte
*regp
= (gdb_byte
*) alloca (register_size (gdbarch
, reg
->regnum
));
8247 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
8250 if (reg
->pnum
== -1)
8253 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
8254 p
= buf
+ strlen (buf
);
8255 regcache
->raw_collect (reg
->regnum
, regp
);
8256 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
8258 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8260 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
8265 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
8266 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
8267 case PACKET_UNKNOWN
:
8270 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
8274 /* Store register REGNUM, or all registers if REGNUM == -1, from the
8275 contents of the register cache buffer. FIXME: ignores errors. */
8278 remote_target::store_registers_using_G (const struct regcache
*regcache
)
8280 struct remote_state
*rs
= get_remote_state ();
8281 remote_arch_state
*rsa
= rs
->get_remote_arch_state (regcache
->arch ());
8285 /* Extract all the registers in the regcache copying them into a
8290 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
8291 memset (regs
, 0, rsa
->sizeof_g_packet
);
8292 for (i
= 0; i
< gdbarch_num_regs (regcache
->arch ()); i
++)
8294 struct packet_reg
*r
= &rsa
->regs
[i
];
8297 regcache
->raw_collect (r
->regnum
, regs
+ r
->offset
);
8301 /* Command describes registers byte by byte,
8302 each byte encoded as two hex characters. */
8305 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
8307 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8308 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
8309 error (_("Could not write registers; remote failure reply '%s'"),
8313 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
8314 of the register cache buffer. FIXME: ignores errors. */
8317 remote_target::store_registers (struct regcache
*regcache
, int regnum
)
8319 struct gdbarch
*gdbarch
= regcache
->arch ();
8320 struct remote_state
*rs
= get_remote_state ();
8321 remote_arch_state
*rsa
= rs
->get_remote_arch_state (gdbarch
);
8324 set_remote_traceframe ();
8325 set_general_thread (regcache
->ptid ());
8329 packet_reg
*reg
= packet_reg_from_regnum (gdbarch
, rsa
, regnum
);
8331 gdb_assert (reg
!= NULL
);
8333 /* Always prefer to store registers using the 'P' packet if
8334 possible; we often change only a small number of registers.
8335 Sometimes we change a larger number; we'd need help from a
8336 higher layer to know to use 'G'. */
8337 if (store_register_using_P (regcache
, reg
))
8340 /* For now, don't complain if we have no way to write the
8341 register. GDB loses track of unavailable registers too
8342 easily. Some day, this may be an error. We don't have
8343 any way to read the register, either... */
8344 if (!reg
->in_g_packet
)
8347 store_registers_using_G (regcache
);
8351 store_registers_using_G (regcache
);
8353 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
8354 if (!rsa
->regs
[i
].in_g_packet
)
8355 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
8356 /* See above for why we do not issue an error here. */
8361 /* Return the number of hex digits in num. */
8364 hexnumlen (ULONGEST num
)
8368 for (i
= 0; num
!= 0; i
++)
8371 return std::max (i
, 1);
8374 /* Set BUF to the minimum number of hex digits representing NUM. */
8377 hexnumstr (char *buf
, ULONGEST num
)
8379 int len
= hexnumlen (num
);
8381 return hexnumnstr (buf
, num
, len
);
8385 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
8388 hexnumnstr (char *buf
, ULONGEST num
, int width
)
8394 for (i
= width
- 1; i
>= 0; i
--)
8396 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
8403 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
8406 remote_address_masked (CORE_ADDR addr
)
8408 unsigned int address_size
= remote_address_size
;
8410 /* If "remoteaddresssize" was not set, default to target address size. */
8412 address_size
= gdbarch_addr_bit (target_gdbarch ());
8414 if (address_size
> 0
8415 && address_size
< (sizeof (ULONGEST
) * 8))
8417 /* Only create a mask when that mask can safely be constructed
8418 in a ULONGEST variable. */
8421 mask
= (mask
<< address_size
) - 1;
8427 /* Determine whether the remote target supports binary downloading.
8428 This is accomplished by sending a no-op memory write of zero length
8429 to the target at the specified address. It does not suffice to send
8430 the whole packet, since many stubs strip the eighth bit and
8431 subsequently compute a wrong checksum, which causes real havoc with
8434 NOTE: This can still lose if the serial line is not eight-bit
8435 clean. In cases like this, the user should clear "remote
8439 remote_target::check_binary_download (CORE_ADDR addr
)
8441 struct remote_state
*rs
= get_remote_state ();
8443 switch (packet_support (PACKET_X
))
8445 case PACKET_DISABLE
:
8449 case PACKET_SUPPORT_UNKNOWN
:
8455 p
+= hexnumstr (p
, (ULONGEST
) addr
);
8457 p
+= hexnumstr (p
, (ULONGEST
) 0);
8461 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8462 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8464 if (rs
->buf
[0] == '\0')
8467 fprintf_unfiltered (gdb_stdlog
,
8468 "binary downloading NOT "
8469 "supported by target\n");
8470 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8475 fprintf_unfiltered (gdb_stdlog
,
8476 "binary downloading supported by target\n");
8477 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8484 /* Helper function to resize the payload in order to try to get a good
8485 alignment. We try to write an amount of data such that the next write will
8486 start on an address aligned on REMOTE_ALIGN_WRITES. */
8489 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8491 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8494 /* Write memory data directly to the remote machine.
8495 This does not inform the data cache; the data cache uses this.
8496 HEADER is the starting part of the packet.
8497 MEMADDR is the address in the remote memory space.
8498 MYADDR is the address of the buffer in our space.
8499 LEN_UNITS is the number of addressable units to write.
8500 UNIT_SIZE is the length in bytes of an addressable unit.
8501 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8502 should send data as binary ('X'), or hex-encoded ('M').
8504 The function creates packet of the form
8505 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8507 where encoding of <DATA> is terminated by PACKET_FORMAT.
8509 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8512 Return the transferred status, error or OK (an
8513 'enum target_xfer_status' value). Save the number of addressable units
8514 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8516 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8517 exchange between gdb and the stub could look like (?? in place of the
8523 -> $M1000,3:eeeeffffeeee#??
8527 <- eeeeffffeeeedddd */
8530 remote_target::remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8531 const gdb_byte
*myaddr
,
8534 ULONGEST
*xfered_len_units
,
8535 char packet_format
, int use_length
)
8537 struct remote_state
*rs
= get_remote_state ();
8543 int payload_capacity_bytes
;
8544 int payload_length_bytes
;
8546 if (packet_format
!= 'X' && packet_format
!= 'M')
8547 internal_error (__FILE__
, __LINE__
,
8548 _("remote_write_bytes_aux: bad packet format"));
8551 return TARGET_XFER_EOF
;
8553 payload_capacity_bytes
= get_memory_write_packet_size ();
8555 /* The packet buffer will be large enough for the payload;
8556 get_memory_packet_size ensures this. */
8559 /* Compute the size of the actual payload by subtracting out the
8560 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8562 payload_capacity_bytes
-= strlen ("$,:#NN");
8564 /* The comma won't be used. */
8565 payload_capacity_bytes
+= 1;
8566 payload_capacity_bytes
-= strlen (header
);
8567 payload_capacity_bytes
-= hexnumlen (memaddr
);
8569 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8571 strcat (rs
->buf
, header
);
8572 p
= rs
->buf
+ strlen (header
);
8574 /* Compute a best guess of the number of bytes actually transfered. */
8575 if (packet_format
== 'X')
8577 /* Best guess at number of bytes that will fit. */
8578 todo_units
= std::min (len_units
,
8579 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8581 payload_capacity_bytes
-= hexnumlen (todo_units
);
8582 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8586 /* Number of bytes that will fit. */
8588 = std::min (len_units
,
8589 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8591 payload_capacity_bytes
-= hexnumlen (todo_units
);
8592 todo_units
= std::min (todo_units
,
8593 (payload_capacity_bytes
/ unit_size
) / 2);
8596 if (todo_units
<= 0)
8597 internal_error (__FILE__
, __LINE__
,
8598 _("minimum packet size too small to write data"));
8600 /* If we already need another packet, then try to align the end
8601 of this packet to a useful boundary. */
8602 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8603 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8605 /* Append "<memaddr>". */
8606 memaddr
= remote_address_masked (memaddr
);
8607 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8614 /* Append the length and retain its location and size. It may need to be
8615 adjusted once the packet body has been created. */
8617 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8625 /* Append the packet body. */
8626 if (packet_format
== 'X')
8628 /* Binary mode. Send target system values byte by byte, in
8629 increasing byte addresses. Only escape certain critical
8631 payload_length_bytes
=
8632 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8633 &units_written
, payload_capacity_bytes
);
8635 /* If not all TODO units fit, then we'll need another packet. Make
8636 a second try to keep the end of the packet aligned. Don't do
8637 this if the packet is tiny. */
8638 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8642 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8644 if (new_todo_units
!= units_written
)
8645 payload_length_bytes
=
8646 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8647 (gdb_byte
*) p
, &units_written
,
8648 payload_capacity_bytes
);
8651 p
+= payload_length_bytes
;
8652 if (use_length
&& units_written
< todo_units
)
8654 /* Escape chars have filled up the buffer prematurely,
8655 and we have actually sent fewer units than planned.
8656 Fix-up the length field of the packet. Use the same
8657 number of characters as before. */
8658 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8660 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8665 /* Normal mode: Send target system values byte by byte, in
8666 increasing byte addresses. Each byte is encoded as a two hex
8668 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8669 units_written
= todo_units
;
8672 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8673 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8675 if (rs
->buf
[0] == 'E')
8676 return TARGET_XFER_E_IO
;
8678 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8679 send fewer units than we'd planned. */
8680 *xfered_len_units
= (ULONGEST
) units_written
;
8681 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8684 /* Write memory data directly to the remote machine.
8685 This does not inform the data cache; the data cache uses this.
8686 MEMADDR is the address in the remote memory space.
8687 MYADDR is the address of the buffer in our space.
8688 LEN is the number of bytes.
8690 Return the transferred status, error or OK (an
8691 'enum target_xfer_status' value). Save the number of bytes
8692 transferred in *XFERED_LEN. Only transfer a single packet. */
8695 remote_target::remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
,
8696 ULONGEST len
, int unit_size
,
8697 ULONGEST
*xfered_len
)
8699 const char *packet_format
= NULL
;
8701 /* Check whether the target supports binary download. */
8702 check_binary_download (memaddr
);
8704 switch (packet_support (PACKET_X
))
8707 packet_format
= "X";
8709 case PACKET_DISABLE
:
8710 packet_format
= "M";
8712 case PACKET_SUPPORT_UNKNOWN
:
8713 internal_error (__FILE__
, __LINE__
,
8714 _("remote_write_bytes: bad internal state"));
8716 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8719 return remote_write_bytes_aux (packet_format
,
8720 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8721 packet_format
[0], 1);
8724 /* Read memory data directly from the remote machine.
8725 This does not use the data cache; the data cache uses this.
8726 MEMADDR is the address in the remote memory space.
8727 MYADDR is the address of the buffer in our space.
8728 LEN_UNITS is the number of addressable memory units to read..
8729 UNIT_SIZE is the length in bytes of an addressable unit.
8731 Return the transferred status, error or OK (an
8732 'enum target_xfer_status' value). Save the number of bytes
8733 transferred in *XFERED_LEN_UNITS.
8735 See the comment of remote_write_bytes_aux for an example of
8736 memory read/write exchange between gdb and the stub. */
8739 remote_target::remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
8741 int unit_size
, ULONGEST
*xfered_len_units
)
8743 struct remote_state
*rs
= get_remote_state ();
8744 int buf_size_bytes
; /* Max size of packet output buffer. */
8749 buf_size_bytes
= get_memory_read_packet_size ();
8750 /* The packet buffer will be large enough for the payload;
8751 get_memory_packet_size ensures this. */
8753 /* Number of units that will fit. */
8754 todo_units
= std::min (len_units
,
8755 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8757 /* Construct "m"<memaddr>","<len>". */
8758 memaddr
= remote_address_masked (memaddr
);
8761 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8763 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8766 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8767 if (rs
->buf
[0] == 'E'
8768 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8769 && rs
->buf
[3] == '\0')
8770 return TARGET_XFER_E_IO
;
8771 /* Reply describes memory byte by byte, each byte encoded as two hex
8774 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8775 /* Return what we have. Let higher layers handle partial reads. */
8776 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8777 return (*xfered_len_units
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
8780 /* Using the set of read-only target sections of remote, read live
8783 For interface/parameters/return description see target.h,
8787 remote_target::remote_xfer_live_readonly_partial (gdb_byte
*readbuf
,
8791 ULONGEST
*xfered_len
)
8793 struct target_section
*secp
;
8794 struct target_section_table
*table
;
8796 secp
= target_section_by_addr (this, memaddr
);
8798 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8799 secp
->the_bfd_section
)
8802 struct target_section
*p
;
8803 ULONGEST memend
= memaddr
+ len
;
8805 table
= target_get_section_table (this);
8807 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8809 if (memaddr
>= p
->addr
)
8811 if (memend
<= p
->endaddr
)
8813 /* Entire transfer is within this section. */
8814 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8817 else if (memaddr
>= p
->endaddr
)
8819 /* This section ends before the transfer starts. */
8824 /* This section overlaps the transfer. Just do half. */
8825 len
= p
->endaddr
- memaddr
;
8826 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8833 return TARGET_XFER_EOF
;
8836 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8837 first if the requested memory is unavailable in traceframe.
8838 Otherwise, fall back to remote_read_bytes_1. */
8841 remote_target::remote_read_bytes (CORE_ADDR memaddr
,
8842 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8843 ULONGEST
*xfered_len
)
8846 return TARGET_XFER_EOF
;
8848 if (get_traceframe_number () != -1)
8850 std::vector
<mem_range
> available
;
8852 /* If we fail to get the set of available memory, then the
8853 target does not support querying traceframe info, and so we
8854 attempt reading from the traceframe anyway (assuming the
8855 target implements the old QTro packet then). */
8856 if (traceframe_available_memory (&available
, memaddr
, len
))
8858 if (available
.empty () || available
[0].start
!= memaddr
)
8860 enum target_xfer_status res
;
8862 /* Don't read into the traceframe's available
8864 if (!available
.empty ())
8866 LONGEST oldlen
= len
;
8868 len
= available
[0].start
- memaddr
;
8869 gdb_assert (len
<= oldlen
);
8872 /* This goes through the topmost target again. */
8873 res
= remote_xfer_live_readonly_partial (myaddr
, memaddr
,
8874 len
, unit_size
, xfered_len
);
8875 if (res
== TARGET_XFER_OK
)
8876 return TARGET_XFER_OK
;
8879 /* No use trying further, we know some memory starting
8880 at MEMADDR isn't available. */
8882 return (*xfered_len
!= 0) ?
8883 TARGET_XFER_UNAVAILABLE
: TARGET_XFER_EOF
;
8887 /* Don't try to read more than how much is available, in
8888 case the target implements the deprecated QTro packet to
8889 cater for older GDBs (the target's knowledge of read-only
8890 sections may be outdated by now). */
8891 len
= available
[0].length
;
8895 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8900 /* Sends a packet with content determined by the printf format string
8901 FORMAT and the remaining arguments, then gets the reply. Returns
8902 whether the packet was a success, a failure, or unknown. */
8905 remote_target::remote_send_printf (const char *format
, ...)
8907 struct remote_state
*rs
= get_remote_state ();
8908 int max_size
= get_remote_packet_size ();
8911 va_start (ap
, format
);
8914 int size
= vsnprintf (rs
->buf
, max_size
, format
, ap
);
8918 if (size
>= max_size
)
8919 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8921 if (putpkt (rs
->buf
) < 0)
8922 error (_("Communication problem with target."));
8925 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8927 return packet_check_result (rs
->buf
);
8930 /* Flash writing can take quite some time. We'll set
8931 effectively infinite timeout for flash operations.
8932 In future, we'll need to decide on a better approach. */
8933 static const int remote_flash_timeout
= 1000;
8936 remote_target::flash_erase (ULONGEST address
, LONGEST length
)
8938 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8939 enum packet_result ret
;
8940 scoped_restore restore_timeout
8941 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8943 ret
= remote_send_printf ("vFlashErase:%s,%s",
8944 phex (address
, addr_size
),
8948 case PACKET_UNKNOWN
:
8949 error (_("Remote target does not support flash erase"));
8951 error (_("Error erasing flash with vFlashErase packet"));
8958 remote_target::remote_flash_write (ULONGEST address
,
8959 ULONGEST length
, ULONGEST
*xfered_len
,
8960 const gdb_byte
*data
)
8962 scoped_restore restore_timeout
8963 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8964 return remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8969 remote_target::flash_done ()
8973 scoped_restore restore_timeout
8974 = make_scoped_restore (&remote_timeout
, remote_flash_timeout
);
8976 ret
= remote_send_printf ("vFlashDone");
8980 case PACKET_UNKNOWN
:
8981 error (_("Remote target does not support vFlashDone"));
8983 error (_("Error finishing flash operation"));
8990 remote_target::files_info ()
8992 puts_filtered ("Debugging a target over a serial line.\n");
8995 /* Stuff for dealing with the packets which are part of this protocol.
8996 See comment at top of file for details. */
8998 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8999 error to higher layers. Called when a serial error is detected.
9000 The exception message is STRING, followed by a colon and a blank,
9001 the system error message for errno at function entry and final dot
9002 for output compatibility with throw_perror_with_name. */
9005 unpush_and_perror (const char *string
)
9007 int saved_errno
= errno
;
9009 remote_unpush_target ();
9010 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
9011 safe_strerror (saved_errno
));
9014 /* Read a single character from the remote end. The current quit
9015 handler is overridden to avoid quitting in the middle of packet
9016 sequence, as that would break communication with the remote server.
9017 See remote_serial_quit_handler for more detail. */
9020 remote_target::readchar (int timeout
)
9023 struct remote_state
*rs
= get_remote_state ();
9026 scoped_restore restore_quit_target
9027 = make_scoped_restore (&curr_quit_handler_target
, this);
9028 scoped_restore restore_quit
9029 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9031 rs
->got_ctrlc_during_io
= 0;
9033 ch
= serial_readchar (rs
->remote_desc
, timeout
);
9035 if (rs
->got_ctrlc_during_io
)
9042 switch ((enum serial_rc
) ch
)
9045 remote_unpush_target ();
9046 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
9049 unpush_and_perror (_("Remote communication error. "
9050 "Target disconnected."));
9052 case SERIAL_TIMEOUT
:
9058 /* Wrapper for serial_write that closes the target and throws if
9059 writing fails. The current quit handler is overridden to avoid
9060 quitting in the middle of packet sequence, as that would break
9061 communication with the remote server. See
9062 remote_serial_quit_handler for more detail. */
9065 remote_target::remote_serial_write (const char *str
, int len
)
9067 struct remote_state
*rs
= get_remote_state ();
9069 scoped_restore restore_quit_target
9070 = make_scoped_restore (&curr_quit_handler_target
, this);
9071 scoped_restore restore_quit
9072 = make_scoped_restore (&quit_handler
, ::remote_serial_quit_handler
);
9074 rs
->got_ctrlc_during_io
= 0;
9076 if (serial_write (rs
->remote_desc
, str
, len
))
9078 unpush_and_perror (_("Remote communication error. "
9079 "Target disconnected."));
9082 if (rs
->got_ctrlc_during_io
)
9086 /* Return a string representing an escaped version of BUF, of len N.
9087 E.g. \n is converted to \\n, \t to \\t, etc. */
9090 escape_buffer (const char *buf
, int n
)
9094 stb
.putstrn (buf
, n
, '\\');
9095 return std::move (stb
.string ());
9098 /* Display a null-terminated packet on stdout, for debugging, using C
9102 print_packet (const char *buf
)
9104 puts_filtered ("\"");
9105 fputstr_filtered (buf
, '"', gdb_stdout
);
9106 puts_filtered ("\"");
9110 remote_target::putpkt (const char *buf
)
9112 return putpkt_binary (buf
, strlen (buf
));
9115 /* Wrapper around remote_target::putpkt to avoid exporting
9119 putpkt (remote_target
*remote
, const char *buf
)
9121 return remote
->putpkt (buf
);
9124 /* Send a packet to the remote machine, with error checking. The data
9125 of the packet is in BUF. The string in BUF can be at most
9126 get_remote_packet_size () - 5 to account for the $, # and checksum,
9127 and for a possible /0 if we are debugging (remote_debug) and want
9128 to print the sent packet as a string. */
9131 remote_target::putpkt_binary (const char *buf
, int cnt
)
9133 struct remote_state
*rs
= get_remote_state ();
9135 unsigned char csum
= 0;
9136 gdb::def_vector
<char> data (cnt
+ 6);
9137 char *buf2
= data
.data ();
9143 /* Catch cases like trying to read memory or listing threads while
9144 we're waiting for a stop reply. The remote server wouldn't be
9145 ready to handle this request, so we'd hang and timeout. We don't
9146 have to worry about this in synchronous mode, because in that
9147 case it's not possible to issue a command while the target is
9148 running. This is not a problem in non-stop mode, because in that
9149 case, the stub is always ready to process serial input. */
9150 if (!target_is_non_stop_p ()
9151 && target_is_async_p ()
9152 && rs
->waiting_for_stop_reply
)
9154 error (_("Cannot execute this command while the target is running.\n"
9155 "Use the \"interrupt\" command to stop the target\n"
9156 "and then try again."));
9159 /* We're sending out a new packet. Make sure we don't look at a
9160 stale cached response. */
9161 rs
->cached_wait_status
= 0;
9163 /* Copy the packet into buffer BUF2, encapsulating it
9164 and giving it a checksum. */
9169 for (i
= 0; i
< cnt
; i
++)
9175 *p
++ = tohex ((csum
>> 4) & 0xf);
9176 *p
++ = tohex (csum
& 0xf);
9178 /* Send it over and over until we get a positive ack. */
9182 int started_error_output
= 0;
9188 int len
= (int) (p
- buf2
);
9191 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
9193 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
9195 if (len
> REMOTE_DEBUG_MAX_CHAR
)
9196 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9197 len
- REMOTE_DEBUG_MAX_CHAR
);
9199 fprintf_unfiltered (gdb_stdlog
, "...");
9201 gdb_flush (gdb_stdlog
);
9203 remote_serial_write (buf2
, p
- buf2
);
9205 /* If this is a no acks version of the remote protocol, send the
9206 packet and move on. */
9210 /* Read until either a timeout occurs (-2) or '+' is read.
9211 Handle any notification that arrives in the mean time. */
9214 ch
= readchar (remote_timeout
);
9222 case SERIAL_TIMEOUT
:
9225 if (started_error_output
)
9227 putchar_unfiltered ('\n');
9228 started_error_output
= 0;
9237 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
9241 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
9243 case SERIAL_TIMEOUT
:
9247 break; /* Retransmit buffer. */
9251 fprintf_unfiltered (gdb_stdlog
,
9252 "Packet instead of Ack, ignoring it\n");
9253 /* It's probably an old response sent because an ACK
9254 was lost. Gobble up the packet and ack it so it
9255 doesn't get retransmitted when we resend this
9258 remote_serial_write ("+", 1);
9259 continue; /* Now, go look for +. */
9266 /* If we got a notification, handle it, and go back to looking
9268 /* We've found the start of a notification. Now
9269 collect the data. */
9270 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
9275 std::string str
= escape_buffer (rs
->buf
, val
);
9277 fprintf_unfiltered (gdb_stdlog
,
9278 " Notification received: %s\n",
9281 handle_notification (rs
->notif_state
, rs
->buf
);
9282 /* We're in sync now, rewait for the ack. */
9289 if (!started_error_output
)
9291 started_error_output
= 1;
9292 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9294 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9295 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
9304 if (!started_error_output
)
9306 started_error_output
= 1;
9307 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
9309 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
9313 break; /* Here to retransmit. */
9317 /* This is wrong. If doing a long backtrace, the user should be
9318 able to get out next time we call QUIT, without anything as
9319 violent as interrupt_query. If we want to provide a way out of
9320 here without getting to the next QUIT, it should be based on
9321 hitting ^C twice as in remote_wait. */
9333 /* Come here after finding the start of a frame when we expected an
9334 ack. Do our best to discard the rest of this packet. */
9337 remote_target::skip_frame ()
9343 c
= readchar (remote_timeout
);
9346 case SERIAL_TIMEOUT
:
9347 /* Nothing we can do. */
9350 /* Discard the two bytes of checksum and stop. */
9351 c
= readchar (remote_timeout
);
9353 c
= readchar (remote_timeout
);
9356 case '*': /* Run length encoding. */
9357 /* Discard the repeat count. */
9358 c
= readchar (remote_timeout
);
9363 /* A regular character. */
9369 /* Come here after finding the start of the frame. Collect the rest
9370 into *BUF, verifying the checksum, length, and handling run-length
9371 compression. NUL terminate the buffer. If there is not enough room,
9372 expand *BUF using xrealloc.
9374 Returns -1 on error, number of characters in buffer (ignoring the
9375 trailing NULL) on success. (could be extended to return one of the
9376 SERIAL status indications). */
9379 remote_target::read_frame (char **buf_p
, long *sizeof_buf
)
9385 struct remote_state
*rs
= get_remote_state ();
9392 c
= readchar (remote_timeout
);
9395 case SERIAL_TIMEOUT
:
9397 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
9401 fputs_filtered ("Saw new packet start in middle of old one\n",
9403 return -1; /* Start a new packet, count retries. */
9406 unsigned char pktcsum
;
9412 check_0
= readchar (remote_timeout
);
9414 check_1
= readchar (remote_timeout
);
9416 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
9419 fputs_filtered ("Timeout in checksum, retrying\n",
9423 else if (check_0
< 0 || check_1
< 0)
9426 fputs_filtered ("Communication error in checksum\n",
9431 /* Don't recompute the checksum; with no ack packets we
9432 don't have any way to indicate a packet retransmission
9437 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9438 if (csum
== pktcsum
)
9443 std::string str
= escape_buffer (buf
, bc
);
9445 fprintf_unfiltered (gdb_stdlog
,
9446 "Bad checksum, sentsum=0x%x, "
9447 "csum=0x%x, buf=%s\n",
9448 pktcsum
, csum
, str
.c_str ());
9450 /* Number of characters in buffer ignoring trailing
9454 case '*': /* Run length encoding. */
9459 c
= readchar (remote_timeout
);
9461 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9463 /* The character before ``*'' is repeated. */
9465 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9467 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
9469 /* Make some more room in the buffer. */
9470 *sizeof_buf
+= repeat
;
9471 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9475 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9481 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9485 if (bc
>= *sizeof_buf
- 1)
9487 /* Make some more room in the buffer. */
9489 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9500 /* Read a packet from the remote machine, with error checking, and
9501 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9502 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9503 rather than timing out; this is used (in synchronous mode) to wait
9504 for a target that is is executing user code to stop. */
9505 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9506 don't have to change all the calls to getpkt to deal with the
9507 return value, because at the moment I don't know what the right
9508 thing to do it for those. */
9511 remote_target::getpkt (char **buf
, long *sizeof_buf
, int forever
)
9513 getpkt_sane (buf
, sizeof_buf
, forever
);
9517 /* Read a packet from the remote machine, with error checking, and
9518 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9519 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9520 rather than timing out; this is used (in synchronous mode) to wait
9521 for a target that is is executing user code to stop. If FOREVER ==
9522 0, this function is allowed to time out gracefully and return an
9523 indication of this to the caller. Otherwise return the number of
9524 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9525 enough reason to return to the caller. *IS_NOTIF is an output
9526 boolean that indicates whether *BUF holds a notification or not
9527 (a regular packet). */
9530 remote_target::getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
,
9531 int forever
, int expecting_notif
,
9534 struct remote_state
*rs
= get_remote_state ();
9540 /* We're reading a new response. Make sure we don't look at a
9541 previously cached response. */
9542 rs
->cached_wait_status
= 0;
9544 strcpy (*buf
, "timeout");
9547 timeout
= watchdog
> 0 ? watchdog
: -1;
9548 else if (expecting_notif
)
9549 timeout
= 0; /* There should already be a char in the buffer. If
9552 timeout
= remote_timeout
;
9556 /* Process any number of notifications, and then return when
9560 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9562 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9564 /* This can loop forever if the remote side sends us
9565 characters continuously, but if it pauses, we'll get
9566 SERIAL_TIMEOUT from readchar because of timeout. Then
9567 we'll count that as a retry.
9569 Note that even when forever is set, we will only wait
9570 forever prior to the start of a packet. After that, we
9571 expect characters to arrive at a brisk pace. They should
9572 show up within remote_timeout intervals. */
9574 c
= readchar (timeout
);
9575 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9577 if (c
== SERIAL_TIMEOUT
)
9579 if (expecting_notif
)
9580 return -1; /* Don't complain, it's normal to not get
9581 anything in this case. */
9583 if (forever
) /* Watchdog went off? Kill the target. */
9585 remote_unpush_target ();
9586 throw_error (TARGET_CLOSE_ERROR
,
9587 _("Watchdog timeout has expired. "
9588 "Target detached."));
9591 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9595 /* We've found the start of a packet or notification.
9596 Now collect the data. */
9597 val
= read_frame (buf
, sizeof_buf
);
9602 remote_serial_write ("-", 1);
9605 if (tries
> MAX_TRIES
)
9607 /* We have tried hard enough, and just can't receive the
9608 packet/notification. Give up. */
9609 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9611 /* Skip the ack char if we're in no-ack mode. */
9612 if (!rs
->noack_mode
)
9613 remote_serial_write ("+", 1);
9617 /* If we got an ordinary packet, return that to our caller. */
9623 = escape_buffer (*buf
,
9624 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9626 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9629 if (val
> REMOTE_DEBUG_MAX_CHAR
)
9630 fprintf_unfiltered (gdb_stdlog
, "[%d bytes omitted]",
9631 val
- REMOTE_DEBUG_MAX_CHAR
);
9633 fprintf_unfiltered (gdb_stdlog
, "\n");
9636 /* Skip the ack char if we're in no-ack mode. */
9637 if (!rs
->noack_mode
)
9638 remote_serial_write ("+", 1);
9639 if (is_notif
!= NULL
)
9644 /* If we got a notification, handle it, and go back to looking
9648 gdb_assert (c
== '%');
9652 std::string str
= escape_buffer (*buf
, val
);
9654 fprintf_unfiltered (gdb_stdlog
,
9655 " Notification received: %s\n",
9658 if (is_notif
!= NULL
)
9661 handle_notification (rs
->notif_state
, *buf
);
9663 /* Notifications require no acknowledgement. */
9665 if (expecting_notif
)
9672 remote_target::getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9674 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9678 remote_target::getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9681 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9685 /* Kill any new fork children of process PID that haven't been
9686 processed by follow_fork. */
9689 remote_target::kill_new_fork_children (int pid
)
9691 remote_state
*rs
= get_remote_state ();
9692 struct notif_client
*notif
= ¬if_client_stop
;
9694 /* Kill the fork child threads of any threads in process PID
9695 that are stopped at a fork event. */
9696 for (thread_info
*thread
: all_non_exited_threads ())
9698 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9700 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9702 int child_pid
= ws
->value
.related_pid
.pid ();
9705 res
= remote_vkill (child_pid
);
9707 error (_("Can't kill fork child process %d"), child_pid
);
9711 /* Check for any pending fork events (not reported or processed yet)
9712 in process PID and kill those fork child threads as well. */
9713 remote_notif_get_pending_events (notif
);
9714 for (auto &event
: rs
->stop_reply_queue
)
9715 if (is_pending_fork_parent (&event
->ws
, pid
, event
->ptid
))
9717 int child_pid
= event
->ws
.value
.related_pid
.pid ();
9720 res
= remote_vkill (child_pid
);
9722 error (_("Can't kill fork child process %d"), child_pid
);
9727 /* Target hook to kill the current inferior. */
9730 remote_target::kill ()
9733 int pid
= inferior_ptid
.pid ();
9734 struct remote_state
*rs
= get_remote_state ();
9736 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9738 /* If we're stopped while forking and we haven't followed yet,
9739 kill the child task. We need to do this before killing the
9740 parent task because if this is a vfork then the parent will
9742 kill_new_fork_children (pid
);
9744 res
= remote_vkill (pid
);
9747 target_mourn_inferior (inferior_ptid
);
9752 /* If we are in 'target remote' mode and we are killing the only
9753 inferior, then we will tell gdbserver to exit and unpush the
9755 if (res
== -1 && !remote_multi_process_p (rs
)
9756 && number_of_live_inferiors () == 1)
9760 /* We've killed the remote end, we get to mourn it. If we are
9761 not in extended mode, mourning the inferior also unpushes
9762 remote_ops from the target stack, which closes the remote
9764 target_mourn_inferior (inferior_ptid
);
9769 error (_("Can't kill process"));
9772 /* Send a kill request to the target using the 'vKill' packet. */
9775 remote_target::remote_vkill (int pid
)
9777 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9780 remote_state
*rs
= get_remote_state ();
9782 /* Tell the remote target to detach. */
9783 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9785 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9787 switch (packet_ok (rs
->buf
,
9788 &remote_protocol_packets
[PACKET_vKill
]))
9794 case PACKET_UNKNOWN
:
9797 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9801 /* Send a kill request to the target using the 'k' packet. */
9804 remote_target::remote_kill_k ()
9806 /* Catch errors so the user can quit from gdb even when we
9807 aren't on speaking terms with the remote system. */
9812 CATCH (ex
, RETURN_MASK_ERROR
)
9814 if (ex
.error
== TARGET_CLOSE_ERROR
)
9816 /* If we got an (EOF) error that caused the target
9817 to go away, then we're done, that's what we wanted.
9818 "k" is susceptible to cause a premature EOF, given
9819 that the remote server isn't actually required to
9820 reply to "k", and it can happen that it doesn't
9821 even get to reply ACK to the "k". */
9825 /* Otherwise, something went wrong. We didn't actually kill
9826 the target. Just propagate the exception, and let the
9827 user or higher layers decide what to do. */
9828 throw_exception (ex
);
9834 remote_target::mourn_inferior ()
9836 struct remote_state
*rs
= get_remote_state ();
9838 /* We're no longer interested in notification events of an inferior
9839 that exited or was killed/detached. */
9840 discard_pending_stop_replies (current_inferior ());
9842 /* In 'target remote' mode with one inferior, we close the connection. */
9843 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9845 unpush_target (this);
9847 /* remote_close takes care of doing most of the clean up. */
9848 generic_mourn_inferior ();
9852 /* In case we got here due to an error, but we're going to stay
9854 rs
->waiting_for_stop_reply
= 0;
9856 /* If the current general thread belonged to the process we just
9857 detached from or has exited, the remote side current general
9858 thread becomes undefined. Considering a case like this:
9860 - We just got here due to a detach.
9861 - The process that we're detaching from happens to immediately
9862 report a global breakpoint being hit in non-stop mode, in the
9863 same thread we had selected before.
9864 - GDB attaches to this process again.
9865 - This event happens to be the next event we handle.
9867 GDB would consider that the current general thread didn't need to
9868 be set on the stub side (with Hg), since for all it knew,
9869 GENERAL_THREAD hadn't changed.
9871 Notice that although in all-stop mode, the remote server always
9872 sets the current thread to the thread reporting the stop event,
9873 that doesn't happen in non-stop mode; in non-stop, the stub *must
9874 not* change the current thread when reporting a breakpoint hit,
9875 due to the decoupling of event reporting and event handling.
9877 To keep things simple, we always invalidate our notion of the
9879 record_currthread (rs
, minus_one_ptid
);
9881 /* Call common code to mark the inferior as not running. */
9882 generic_mourn_inferior ();
9884 if (!have_inferiors ())
9886 if (!remote_multi_process_p (rs
))
9888 /* Check whether the target is running now - some remote stubs
9889 automatically restart after kill. */
9891 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9893 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9895 /* Assume that the target has been restarted. Set
9896 inferior_ptid so that bits of core GDB realizes
9897 there's something here, e.g., so that the user can
9898 say "kill" again. */
9899 inferior_ptid
= magic_null_ptid
;
9906 extended_remote_target::supports_disable_randomization ()
9908 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9912 remote_target::extended_remote_disable_randomization (int val
)
9914 struct remote_state
*rs
= get_remote_state ();
9917 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9920 reply
= remote_get_noisy_reply ();
9922 error (_("Target does not support QDisableRandomization."));
9923 if (strcmp (reply
, "OK") != 0)
9924 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9928 remote_target::extended_remote_run (const std::string
&args
)
9930 struct remote_state
*rs
= get_remote_state ();
9932 const char *remote_exec_file
= get_remote_exec_file ();
9934 /* If the user has disabled vRun support, or we have detected that
9935 support is not available, do not try it. */
9936 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9939 strcpy (rs
->buf
, "vRun;");
9940 len
= strlen (rs
->buf
);
9942 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9943 error (_("Remote file name too long for run packet"));
9944 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9945 strlen (remote_exec_file
));
9951 gdb_argv
argv (args
.c_str ());
9952 for (i
= 0; argv
[i
] != NULL
; i
++)
9954 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9955 error (_("Argument list too long for run packet"));
9956 rs
->buf
[len
++] = ';';
9957 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9962 rs
->buf
[len
++] = '\0';
9965 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9967 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9970 /* We have a wait response. All is well. */
9972 case PACKET_UNKNOWN
:
9975 if (remote_exec_file
[0] == '\0')
9976 error (_("Running the default executable on the remote target failed; "
9977 "try \"set remote exec-file\"?"));
9979 error (_("Running \"%s\" on the remote target failed"),
9982 gdb_assert_not_reached (_("bad switch"));
9986 /* Helper function to send set/unset environment packets. ACTION is
9987 either "set" or "unset". PACKET is either "QEnvironmentHexEncoded"
9988 or "QEnvironmentUnsetVariable". VALUE is the variable to be
9992 remote_target::send_environment_packet (const char *action
,
9996 remote_state
*rs
= get_remote_state ();
9998 /* Convert the environment variable to an hex string, which
9999 is the best format to be transmitted over the wire. */
10000 std::string encoded_value
= bin2hex ((const gdb_byte
*) value
,
10003 xsnprintf (rs
->buf
, get_remote_packet_size (),
10004 "%s:%s", packet
, encoded_value
.c_str ());
10007 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10008 if (strcmp (rs
->buf
, "OK") != 0)
10009 warning (_("Unable to %s environment variable '%s' on remote."),
10013 /* Helper function to handle the QEnvironment* packets. */
10016 remote_target::extended_remote_environment_support ()
10018 remote_state
*rs
= get_remote_state ();
10020 if (packet_support (PACKET_QEnvironmentReset
) != PACKET_DISABLE
)
10022 putpkt ("QEnvironmentReset");
10023 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10024 if (strcmp (rs
->buf
, "OK") != 0)
10025 warning (_("Unable to reset environment on remote."));
10028 gdb_environ
*e
= ¤t_inferior ()->environment
;
10030 if (packet_support (PACKET_QEnvironmentHexEncoded
) != PACKET_DISABLE
)
10031 for (const std::string
&el
: e
->user_set_env ())
10032 send_environment_packet ("set", "QEnvironmentHexEncoded",
10035 if (packet_support (PACKET_QEnvironmentUnset
) != PACKET_DISABLE
)
10036 for (const std::string
&el
: e
->user_unset_env ())
10037 send_environment_packet ("unset", "QEnvironmentUnset", el
.c_str ());
10040 /* Helper function to set the current working directory for the
10041 inferior in the remote target. */
10044 remote_target::extended_remote_set_inferior_cwd ()
10046 if (packet_support (PACKET_QSetWorkingDir
) != PACKET_DISABLE
)
10048 const char *inferior_cwd
= get_inferior_cwd ();
10049 remote_state
*rs
= get_remote_state ();
10051 if (inferior_cwd
!= NULL
)
10053 std::string hexpath
= bin2hex ((const gdb_byte
*) inferior_cwd
,
10054 strlen (inferior_cwd
));
10056 xsnprintf (rs
->buf
, get_remote_packet_size (),
10057 "QSetWorkingDir:%s", hexpath
.c_str ());
10061 /* An empty inferior_cwd means that the user wants us to
10062 reset the remote server's inferior's cwd. */
10063 xsnprintf (rs
->buf
, get_remote_packet_size (),
10064 "QSetWorkingDir:");
10068 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10069 if (packet_ok (rs
->buf
,
10070 &remote_protocol_packets
[PACKET_QSetWorkingDir
])
10073 Remote replied unexpectedly while setting the inferior's working\n\
10080 /* In the extended protocol we want to be able to do things like
10081 "run" and have them basically work as expected. So we need
10082 a special create_inferior function. We support changing the
10083 executable file and the command line arguments, but not the
10087 extended_remote_target::create_inferior (const char *exec_file
,
10088 const std::string
&args
,
10089 char **env
, int from_tty
)
10093 struct remote_state
*rs
= get_remote_state ();
10094 const char *remote_exec_file
= get_remote_exec_file ();
10096 /* If running asynchronously, register the target file descriptor
10097 with the event loop. */
10098 if (target_can_async_p ())
10101 /* Disable address space randomization if requested (and supported). */
10102 if (supports_disable_randomization ())
10103 extended_remote_disable_randomization (disable_randomization
);
10105 /* If startup-with-shell is on, we inform gdbserver to start the
10106 remote inferior using a shell. */
10107 if (packet_support (PACKET_QStartupWithShell
) != PACKET_DISABLE
)
10109 xsnprintf (rs
->buf
, get_remote_packet_size (),
10110 "QStartupWithShell:%d", startup_with_shell
? 1 : 0);
10112 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10113 if (strcmp (rs
->buf
, "OK") != 0)
10115 Remote replied unexpectedly while setting startup-with-shell: %s"),
10119 extended_remote_environment_support ();
10121 extended_remote_set_inferior_cwd ();
10123 /* Now restart the remote server. */
10124 run_worked
= extended_remote_run (args
) != -1;
10127 /* vRun was not supported. Fail if we need it to do what the
10129 if (remote_exec_file
[0])
10130 error (_("Remote target does not support \"set remote exec-file\""));
10131 if (!args
.empty ())
10132 error (_("Remote target does not support \"set args\" or run ARGS"));
10134 /* Fall back to "R". */
10135 extended_remote_restart ();
10138 /* vRun's success return is a stop reply. */
10139 stop_reply
= run_worked
? rs
->buf
: NULL
;
10140 add_current_inferior_and_thread (stop_reply
);
10142 /* Get updated offsets, if the stub uses qOffsets. */
10147 /* Given a location's target info BP_TGT and the packet buffer BUF, output
10148 the list of conditions (in agent expression bytecode format), if any, the
10149 target needs to evaluate. The output is placed into the packet buffer
10150 started from BUF and ended at BUF_END. */
10153 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
10154 struct bp_target_info
*bp_tgt
, char *buf
,
10157 if (bp_tgt
->conditions
.empty ())
10160 buf
+= strlen (buf
);
10161 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
10164 /* Send conditions to the target. */
10165 for (agent_expr
*aexpr
: bp_tgt
->conditions
)
10167 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
10168 buf
+= strlen (buf
);
10169 for (int i
= 0; i
< aexpr
->len
; ++i
)
10170 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10177 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
10178 struct bp_target_info
*bp_tgt
, char *buf
)
10180 if (bp_tgt
->tcommands
.empty ())
10183 buf
+= strlen (buf
);
10185 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
10186 buf
+= strlen (buf
);
10188 /* Concatenate all the agent expressions that are commands into the
10190 for (agent_expr
*aexpr
: bp_tgt
->tcommands
)
10192 sprintf (buf
, "X%x,", aexpr
->len
);
10193 buf
+= strlen (buf
);
10194 for (int i
= 0; i
< aexpr
->len
; ++i
)
10195 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
10200 /* Insert a breakpoint. On targets that have software breakpoint
10201 support, we ask the remote target to do the work; on targets
10202 which don't, we insert a traditional memory breakpoint. */
10205 remote_target::insert_breakpoint (struct gdbarch
*gdbarch
,
10206 struct bp_target_info
*bp_tgt
)
10208 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
10209 If it succeeds, then set the support to PACKET_ENABLE. If it
10210 fails, and the user has explicitly requested the Z support then
10211 report an error, otherwise, mark it disabled and go on. */
10213 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10215 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10216 struct remote_state
*rs
;
10219 /* Make sure the remote is pointing at the right process, if
10221 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10222 set_general_process ();
10224 rs
= get_remote_state ();
10226 endbuf
= rs
->buf
+ get_remote_packet_size ();
10231 addr
= (ULONGEST
) remote_address_masked (addr
);
10232 p
+= hexnumstr (p
, addr
);
10233 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10235 if (supports_evaluation_of_breakpoint_conditions ())
10236 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10238 if (can_run_breakpoint_commands ())
10239 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10242 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10244 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
10250 case PACKET_UNKNOWN
:
10255 /* If this breakpoint has target-side commands but this stub doesn't
10256 support Z0 packets, throw error. */
10257 if (!bp_tgt
->tcommands
.empty ())
10258 throw_error (NOT_SUPPORTED_ERROR
, _("\
10259 Target doesn't support breakpoints that have target side commands."));
10261 return memory_insert_breakpoint (this, gdbarch
, bp_tgt
);
10265 remote_target::remove_breakpoint (struct gdbarch
*gdbarch
,
10266 struct bp_target_info
*bp_tgt
,
10267 enum remove_bp_reason reason
)
10269 CORE_ADDR addr
= bp_tgt
->placed_address
;
10270 struct remote_state
*rs
= get_remote_state ();
10272 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
10275 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10277 /* Make sure the remote is pointing at the right process, if
10279 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10280 set_general_process ();
10286 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
10287 p
+= hexnumstr (p
, addr
);
10288 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
10291 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10293 return (rs
->buf
[0] == 'E');
10296 return memory_remove_breakpoint (this, gdbarch
, bp_tgt
, reason
);
10299 static enum Z_packet_type
10300 watchpoint_to_Z_packet (int type
)
10305 return Z_PACKET_WRITE_WP
;
10308 return Z_PACKET_READ_WP
;
10311 return Z_PACKET_ACCESS_WP
;
10314 internal_error (__FILE__
, __LINE__
,
10315 _("hw_bp_to_z: bad watchpoint type %d"), type
);
10320 remote_target::insert_watchpoint (CORE_ADDR addr
, int len
,
10321 enum target_hw_bp_type type
, struct expression
*cond
)
10323 struct remote_state
*rs
= get_remote_state ();
10324 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10326 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10328 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10331 /* Make sure the remote is pointing at the right process, if
10333 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10334 set_general_process ();
10336 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
10337 p
= strchr (rs
->buf
, '\0');
10338 addr
= remote_address_masked (addr
);
10339 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10340 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10343 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10345 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10349 case PACKET_UNKNOWN
:
10354 internal_error (__FILE__
, __LINE__
,
10355 _("remote_insert_watchpoint: reached end of function"));
10359 remote_target::watchpoint_addr_within_range (CORE_ADDR addr
,
10360 CORE_ADDR start
, int length
)
10362 CORE_ADDR diff
= remote_address_masked (addr
- start
);
10364 return diff
< length
;
10369 remote_target::remove_watchpoint (CORE_ADDR addr
, int len
,
10370 enum target_hw_bp_type type
, struct expression
*cond
)
10372 struct remote_state
*rs
= get_remote_state ();
10373 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10375 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
10377 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
10380 /* Make sure the remote is pointing at the right process, if
10382 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10383 set_general_process ();
10385 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
10386 p
= strchr (rs
->buf
, '\0');
10387 addr
= remote_address_masked (addr
);
10388 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10389 xsnprintf (p
, endbuf
- p
, ",%x", len
);
10391 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10393 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
10396 case PACKET_UNKNOWN
:
10401 internal_error (__FILE__
, __LINE__
,
10402 _("remote_remove_watchpoint: reached end of function"));
10406 int remote_hw_watchpoint_limit
= -1;
10407 int remote_hw_watchpoint_length_limit
= -1;
10408 int remote_hw_breakpoint_limit
= -1;
10411 remote_target::region_ok_for_hw_watchpoint (CORE_ADDR addr
, int len
)
10413 if (remote_hw_watchpoint_length_limit
== 0)
10415 else if (remote_hw_watchpoint_length_limit
< 0)
10417 else if (len
<= remote_hw_watchpoint_length_limit
)
10424 remote_target::can_use_hw_breakpoint (enum bptype type
, int cnt
, int ot
)
10426 if (type
== bp_hardware_breakpoint
)
10428 if (remote_hw_breakpoint_limit
== 0)
10430 else if (remote_hw_breakpoint_limit
< 0)
10432 else if (cnt
<= remote_hw_breakpoint_limit
)
10437 if (remote_hw_watchpoint_limit
== 0)
10439 else if (remote_hw_watchpoint_limit
< 0)
10443 else if (cnt
<= remote_hw_watchpoint_limit
)
10449 /* The to_stopped_by_sw_breakpoint method of target remote. */
10452 remote_target::stopped_by_sw_breakpoint ()
10454 struct thread_info
*thread
= inferior_thread ();
10456 return (thread
->priv
!= NULL
10457 && (get_remote_thread_info (thread
)->stop_reason
10458 == TARGET_STOPPED_BY_SW_BREAKPOINT
));
10461 /* The to_supports_stopped_by_sw_breakpoint method of target
10465 remote_target::supports_stopped_by_sw_breakpoint ()
10467 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
10470 /* The to_stopped_by_hw_breakpoint method of target remote. */
10473 remote_target::stopped_by_hw_breakpoint ()
10475 struct thread_info
*thread
= inferior_thread ();
10477 return (thread
->priv
!= NULL
10478 && (get_remote_thread_info (thread
)->stop_reason
10479 == TARGET_STOPPED_BY_HW_BREAKPOINT
));
10482 /* The to_supports_stopped_by_hw_breakpoint method of target
10486 remote_target::supports_stopped_by_hw_breakpoint ()
10488 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
10492 remote_target::stopped_by_watchpoint ()
10494 struct thread_info
*thread
= inferior_thread ();
10496 return (thread
->priv
!= NULL
10497 && (get_remote_thread_info (thread
)->stop_reason
10498 == TARGET_STOPPED_BY_WATCHPOINT
));
10502 remote_target::stopped_data_address (CORE_ADDR
*addr_p
)
10504 struct thread_info
*thread
= inferior_thread ();
10506 if (thread
->priv
!= NULL
10507 && (get_remote_thread_info (thread
)->stop_reason
10508 == TARGET_STOPPED_BY_WATCHPOINT
))
10510 *addr_p
= get_remote_thread_info (thread
)->watch_data_address
;
10519 remote_target::insert_hw_breakpoint (struct gdbarch
*gdbarch
,
10520 struct bp_target_info
*bp_tgt
)
10522 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10523 struct remote_state
*rs
;
10527 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10530 /* Make sure the remote is pointing at the right process, if
10532 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10533 set_general_process ();
10535 rs
= get_remote_state ();
10537 endbuf
= rs
->buf
+ get_remote_packet_size ();
10543 addr
= remote_address_masked (addr
);
10544 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10545 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10547 if (supports_evaluation_of_breakpoint_conditions ())
10548 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10550 if (can_run_breakpoint_commands ())
10551 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10554 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10556 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10559 if (rs
->buf
[1] == '.')
10561 message
= strchr (rs
->buf
+ 2, '.');
10563 error (_("Remote failure reply: %s"), message
+ 1);
10566 case PACKET_UNKNOWN
:
10571 internal_error (__FILE__
, __LINE__
,
10572 _("remote_insert_hw_breakpoint: reached end of function"));
10577 remote_target::remove_hw_breakpoint (struct gdbarch
*gdbarch
,
10578 struct bp_target_info
*bp_tgt
)
10581 struct remote_state
*rs
= get_remote_state ();
10583 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10585 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10588 /* Make sure the remote is pointing at the right process, if
10590 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10591 set_general_process ();
10597 addr
= remote_address_masked (bp_tgt
->placed_address
);
10598 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10599 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10602 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10604 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10607 case PACKET_UNKNOWN
:
10612 internal_error (__FILE__
, __LINE__
,
10613 _("remote_remove_hw_breakpoint: reached end of function"));
10616 /* Verify memory using the "qCRC:" request. */
10619 remote_target::verify_memory (const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10621 struct remote_state
*rs
= get_remote_state ();
10622 unsigned long host_crc
, target_crc
;
10625 /* It doesn't make sense to use qCRC if the remote target is
10626 connected but not running. */
10627 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10629 enum packet_result result
;
10631 /* Make sure the remote is pointing at the right process. */
10632 set_general_process ();
10634 /* FIXME: assumes lma can fit into long. */
10635 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10636 (long) lma
, (long) size
);
10639 /* Be clever; compute the host_crc before waiting for target
10641 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10643 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10645 result
= packet_ok (rs
->buf
,
10646 &remote_protocol_packets
[PACKET_qCRC
]);
10647 if (result
== PACKET_ERROR
)
10649 else if (result
== PACKET_OK
)
10651 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10652 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10654 return (host_crc
== target_crc
);
10658 return simple_verify_memory (this, data
, lma
, size
);
10661 /* compare-sections command
10663 With no arguments, compares each loadable section in the exec bfd
10664 with the same memory range on the target, and reports mismatches.
10665 Useful for verifying the image on the target against the exec file. */
10668 compare_sections_command (const char *args
, int from_tty
)
10671 const char *sectname
;
10672 bfd_size_type size
;
10675 int mismatched
= 0;
10680 error (_("command cannot be used without an exec file"));
10682 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10688 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10690 if (!(s
->flags
& SEC_LOAD
))
10691 continue; /* Skip non-loadable section. */
10693 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10694 continue; /* Skip writeable sections */
10696 size
= bfd_get_section_size (s
);
10698 continue; /* Skip zero-length section. */
10700 sectname
= bfd_get_section_name (exec_bfd
, s
);
10701 if (args
&& strcmp (args
, sectname
) != 0)
10702 continue; /* Not the section selected by user. */
10704 matched
= 1; /* Do this section. */
10707 gdb::byte_vector
sectdata (size
);
10708 bfd_get_section_contents (exec_bfd
, s
, sectdata
.data (), 0, size
);
10710 res
= target_verify_memory (sectdata
.data (), lma
, size
);
10713 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10714 paddress (target_gdbarch (), lma
),
10715 paddress (target_gdbarch (), lma
+ size
));
10717 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10718 paddress (target_gdbarch (), lma
),
10719 paddress (target_gdbarch (), lma
+ size
));
10721 printf_filtered ("matched.\n");
10724 printf_filtered ("MIS-MATCHED!\n");
10728 if (mismatched
> 0)
10729 warning (_("One or more sections of the target image does not match\n\
10730 the loaded file\n"));
10731 if (args
&& !matched
)
10732 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10735 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10736 into remote target. The number of bytes written to the remote
10737 target is returned, or -1 for error. */
10740 remote_target::remote_write_qxfer (const char *object_name
,
10741 const char *annex
, const gdb_byte
*writebuf
,
10742 ULONGEST offset
, LONGEST len
,
10743 ULONGEST
*xfered_len
,
10744 struct packet_config
*packet
)
10748 struct remote_state
*rs
= get_remote_state ();
10749 int max_size
= get_memory_write_packet_size ();
10751 if (packet_config_support (packet
) == PACKET_DISABLE
)
10752 return TARGET_XFER_E_IO
;
10754 /* Insert header. */
10755 i
= snprintf (rs
->buf
, max_size
,
10756 "qXfer:%s:write:%s:%s:",
10757 object_name
, annex
? annex
: "",
10758 phex_nz (offset
, sizeof offset
));
10759 max_size
-= (i
+ 1);
10761 /* Escape as much data as fits into rs->buf. */
10762 buf_len
= remote_escape_output
10763 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10765 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10766 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10767 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10768 return TARGET_XFER_E_IO
;
10770 unpack_varlen_hex (rs
->buf
, &n
);
10773 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
10776 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10777 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10778 number of bytes read is returned, or 0 for EOF, or -1 for error.
10779 The number of bytes read may be less than LEN without indicating an
10780 EOF. PACKET is checked and updated to indicate whether the remote
10781 target supports this object. */
10784 remote_target::remote_read_qxfer (const char *object_name
,
10786 gdb_byte
*readbuf
, ULONGEST offset
,
10788 ULONGEST
*xfered_len
,
10789 struct packet_config
*packet
)
10791 struct remote_state
*rs
= get_remote_state ();
10792 LONGEST i
, n
, packet_len
;
10794 if (packet_config_support (packet
) == PACKET_DISABLE
)
10795 return TARGET_XFER_E_IO
;
10797 /* Check whether we've cached an end-of-object packet that matches
10799 if (rs
->finished_object
)
10801 if (strcmp (object_name
, rs
->finished_object
) == 0
10802 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10803 && offset
== rs
->finished_offset
)
10804 return TARGET_XFER_EOF
;
10807 /* Otherwise, we're now reading something different. Discard
10809 xfree (rs
->finished_object
);
10810 xfree (rs
->finished_annex
);
10811 rs
->finished_object
= NULL
;
10812 rs
->finished_annex
= NULL
;
10815 /* Request only enough to fit in a single packet. The actual data
10816 may not, since we don't know how much of it will need to be escaped;
10817 the target is free to respond with slightly less data. We subtract
10818 five to account for the response type and the protocol frame. */
10819 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10820 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10821 object_name
, annex
? annex
: "",
10822 phex_nz (offset
, sizeof offset
),
10823 phex_nz (n
, sizeof n
));
10824 i
= putpkt (rs
->buf
);
10826 return TARGET_XFER_E_IO
;
10829 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10830 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10831 return TARGET_XFER_E_IO
;
10833 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10834 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10836 /* 'm' means there is (or at least might be) more data after this
10837 batch. That does not make sense unless there's at least one byte
10838 of data in this reply. */
10839 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10840 error (_("Remote qXfer reply contained no data."));
10842 /* Got some data. */
10843 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10844 packet_len
- 1, readbuf
, n
);
10846 /* 'l' is an EOF marker, possibly including a final block of data,
10847 or possibly empty. If we have the final block of a non-empty
10848 object, record this fact to bypass a subsequent partial read. */
10849 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10851 rs
->finished_object
= xstrdup (object_name
);
10852 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10853 rs
->finished_offset
= offset
+ i
;
10857 return TARGET_XFER_EOF
;
10861 return TARGET_XFER_OK
;
10865 enum target_xfer_status
10866 remote_target::xfer_partial (enum target_object object
,
10867 const char *annex
, gdb_byte
*readbuf
,
10868 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10869 ULONGEST
*xfered_len
)
10871 struct remote_state
*rs
;
10875 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10877 set_remote_traceframe ();
10878 set_general_thread (inferior_ptid
);
10880 rs
= get_remote_state ();
10882 /* Handle memory using the standard memory routines. */
10883 if (object
== TARGET_OBJECT_MEMORY
)
10885 /* If the remote target is connected but not running, we should
10886 pass this request down to a lower stratum (e.g. the executable
10888 if (!target_has_execution
)
10889 return TARGET_XFER_EOF
;
10891 if (writebuf
!= NULL
)
10892 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10895 return remote_read_bytes (offset
, readbuf
, len
, unit_size
,
10899 /* Handle SPU memory using qxfer packets. */
10900 if (object
== TARGET_OBJECT_SPU
)
10903 return remote_read_qxfer ("spu", annex
, readbuf
, offset
, len
,
10904 xfered_len
, &remote_protocol_packets
10905 [PACKET_qXfer_spu_read
]);
10907 return remote_write_qxfer ("spu", annex
, writebuf
, offset
, len
,
10908 xfered_len
, &remote_protocol_packets
10909 [PACKET_qXfer_spu_write
]);
10912 /* Handle extra signal info using qxfer packets. */
10913 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10916 return remote_read_qxfer ("siginfo", annex
, readbuf
, offset
, len
,
10917 xfered_len
, &remote_protocol_packets
10918 [PACKET_qXfer_siginfo_read
]);
10920 return remote_write_qxfer ("siginfo", annex
,
10921 writebuf
, offset
, len
, xfered_len
,
10922 &remote_protocol_packets
10923 [PACKET_qXfer_siginfo_write
]);
10926 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10929 return remote_read_qxfer ("statictrace", annex
,
10930 readbuf
, offset
, len
, xfered_len
,
10931 &remote_protocol_packets
10932 [PACKET_qXfer_statictrace_read
]);
10934 return TARGET_XFER_E_IO
;
10937 /* Only handle flash writes. */
10938 if (writebuf
!= NULL
)
10942 case TARGET_OBJECT_FLASH
:
10943 return remote_flash_write (offset
, len
, xfered_len
,
10947 return TARGET_XFER_E_IO
;
10951 /* Map pre-existing objects onto letters. DO NOT do this for new
10952 objects!!! Instead specify new query packets. */
10955 case TARGET_OBJECT_AVR
:
10959 case TARGET_OBJECT_AUXV
:
10960 gdb_assert (annex
== NULL
);
10961 return remote_read_qxfer ("auxv", annex
, readbuf
, offset
, len
,
10963 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10965 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10966 return remote_read_qxfer
10967 ("features", annex
, readbuf
, offset
, len
, xfered_len
,
10968 &remote_protocol_packets
[PACKET_qXfer_features
]);
10970 case TARGET_OBJECT_LIBRARIES
:
10971 return remote_read_qxfer
10972 ("libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10973 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10975 case TARGET_OBJECT_LIBRARIES_SVR4
:
10976 return remote_read_qxfer
10977 ("libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10978 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10980 case TARGET_OBJECT_MEMORY_MAP
:
10981 gdb_assert (annex
== NULL
);
10982 return remote_read_qxfer ("memory-map", annex
, readbuf
, offset
, len
,
10984 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10986 case TARGET_OBJECT_OSDATA
:
10987 /* Should only get here if we're connected. */
10988 gdb_assert (rs
->remote_desc
);
10989 return remote_read_qxfer
10990 ("osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10991 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10993 case TARGET_OBJECT_THREADS
:
10994 gdb_assert (annex
== NULL
);
10995 return remote_read_qxfer ("threads", annex
, readbuf
, offset
, len
,
10997 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10999 case TARGET_OBJECT_TRACEFRAME_INFO
:
11000 gdb_assert (annex
== NULL
);
11001 return remote_read_qxfer
11002 ("traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
11003 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
11005 case TARGET_OBJECT_FDPIC
:
11006 return remote_read_qxfer ("fdpic", annex
, readbuf
, offset
, len
,
11008 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
11010 case TARGET_OBJECT_OPENVMS_UIB
:
11011 return remote_read_qxfer ("uib", annex
, readbuf
, offset
, len
,
11013 &remote_protocol_packets
[PACKET_qXfer_uib
]);
11015 case TARGET_OBJECT_BTRACE
:
11016 return remote_read_qxfer ("btrace", annex
, readbuf
, offset
, len
,
11018 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
11020 case TARGET_OBJECT_BTRACE_CONF
:
11021 return remote_read_qxfer ("btrace-conf", annex
, readbuf
, offset
,
11023 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
11025 case TARGET_OBJECT_EXEC_FILE
:
11026 return remote_read_qxfer ("exec-file", annex
, readbuf
, offset
,
11028 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
11031 return TARGET_XFER_E_IO
;
11034 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
11035 large enough let the caller deal with it. */
11036 if (len
< get_remote_packet_size ())
11037 return TARGET_XFER_E_IO
;
11038 len
= get_remote_packet_size ();
11040 /* Except for querying the minimum buffer size, target must be open. */
11041 if (!rs
->remote_desc
)
11042 error (_("remote query is only available after target open"));
11044 gdb_assert (annex
!= NULL
);
11045 gdb_assert (readbuf
!= NULL
);
11049 *p2
++ = query_type
;
11051 /* We used one buffer char for the remote protocol q command and
11052 another for the query type. As the remote protocol encapsulation
11053 uses 4 chars plus one extra in case we are debugging
11054 (remote_debug), we have PBUFZIZ - 7 left to pack the query
11057 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
11059 /* Bad caller may have sent forbidden characters. */
11060 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
11065 gdb_assert (annex
[i
] == '\0');
11067 i
= putpkt (rs
->buf
);
11069 return TARGET_XFER_E_IO
;
11071 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11072 strcpy ((char *) readbuf
, rs
->buf
);
11074 *xfered_len
= strlen ((char *) readbuf
);
11075 return (*xfered_len
!= 0) ? TARGET_XFER_OK
: TARGET_XFER_EOF
;
11078 /* Implementation of to_get_memory_xfer_limit. */
11081 remote_target::get_memory_xfer_limit ()
11083 return get_memory_write_packet_size ();
11087 remote_target::search_memory (CORE_ADDR start_addr
, ULONGEST search_space_len
,
11088 const gdb_byte
*pattern
, ULONGEST pattern_len
,
11089 CORE_ADDR
*found_addrp
)
11091 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
11092 struct remote_state
*rs
= get_remote_state ();
11093 int max_size
= get_memory_write_packet_size ();
11094 struct packet_config
*packet
=
11095 &remote_protocol_packets
[PACKET_qSearch_memory
];
11096 /* Number of packet bytes used to encode the pattern;
11097 this could be more than PATTERN_LEN due to escape characters. */
11098 int escaped_pattern_len
;
11099 /* Amount of pattern that was encodable in the packet. */
11100 int used_pattern_len
;
11103 ULONGEST found_addr
;
11105 /* Don't go to the target if we don't have to. This is done before
11106 checking packet_config_support to avoid the possibility that a
11107 success for this edge case means the facility works in
11109 if (pattern_len
> search_space_len
)
11111 if (pattern_len
== 0)
11113 *found_addrp
= start_addr
;
11117 /* If we already know the packet isn't supported, fall back to the simple
11118 way of searching memory. */
11120 if (packet_config_support (packet
) == PACKET_DISABLE
)
11122 /* Target doesn't provided special support, fall back and use the
11123 standard support (copy memory and do the search here). */
11124 return simple_search_memory (this, start_addr
, search_space_len
,
11125 pattern
, pattern_len
, found_addrp
);
11128 /* Make sure the remote is pointing at the right process. */
11129 set_general_process ();
11131 /* Insert header. */
11132 i
= snprintf (rs
->buf
, max_size
,
11133 "qSearch:memory:%s;%s;",
11134 phex_nz (start_addr
, addr_size
),
11135 phex_nz (search_space_len
, sizeof (search_space_len
)));
11136 max_size
-= (i
+ 1);
11138 /* Escape as much data as fits into rs->buf. */
11139 escaped_pattern_len
=
11140 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
11141 &used_pattern_len
, max_size
);
11143 /* Bail if the pattern is too large. */
11144 if (used_pattern_len
!= pattern_len
)
11145 error (_("Pattern is too large to transmit to remote target."));
11147 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
11148 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
11149 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
11151 /* The request may not have worked because the command is not
11152 supported. If so, fall back to the simple way. */
11153 if (packet_config_support (packet
) == PACKET_DISABLE
)
11155 return simple_search_memory (this, start_addr
, search_space_len
,
11156 pattern
, pattern_len
, found_addrp
);
11161 if (rs
->buf
[0] == '0')
11163 else if (rs
->buf
[0] == '1')
11166 if (rs
->buf
[1] != ',')
11167 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
11168 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
11169 *found_addrp
= found_addr
;
11172 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
11178 remote_target::rcmd (const char *command
, struct ui_file
*outbuf
)
11180 struct remote_state
*rs
= get_remote_state ();
11183 if (!rs
->remote_desc
)
11184 error (_("remote rcmd is only available after target open"));
11186 /* Send a NULL command across as an empty command. */
11187 if (command
== NULL
)
11190 /* The query prefix. */
11191 strcpy (rs
->buf
, "qRcmd,");
11192 p
= strchr (rs
->buf
, '\0');
11194 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
11195 > get_remote_packet_size ())
11196 error (_("\"monitor\" command ``%s'' is too long."), command
);
11198 /* Encode the actual command. */
11199 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
11201 if (putpkt (rs
->buf
) < 0)
11202 error (_("Communication problem with target."));
11204 /* get/display the response */
11209 /* XXX - see also remote_get_noisy_reply(). */
11210 QUIT
; /* Allow user to bail out with ^C. */
11212 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
11214 /* Timeout. Continue to (try to) read responses.
11215 This is better than stopping with an error, assuming the stub
11216 is still executing the (long) monitor command.
11217 If needed, the user can interrupt gdb using C-c, obtaining
11218 an effect similar to stop on timeout. */
11222 if (buf
[0] == '\0')
11223 error (_("Target does not support this command."));
11224 if (buf
[0] == 'O' && buf
[1] != 'K')
11226 remote_console_output (buf
+ 1); /* 'O' message from stub. */
11229 if (strcmp (buf
, "OK") == 0)
11231 if (strlen (buf
) == 3 && buf
[0] == 'E'
11232 && isdigit (buf
[1]) && isdigit (buf
[2]))
11234 error (_("Protocol error with Rcmd"));
11236 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
11238 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
11240 fputc_unfiltered (c
, outbuf
);
11246 std::vector
<mem_region
>
11247 remote_target::memory_map ()
11249 std::vector
<mem_region
> result
;
11250 gdb::optional
<gdb::char_vector
> text
11251 = target_read_stralloc (current_top_target (), TARGET_OBJECT_MEMORY_MAP
, NULL
);
11254 result
= parse_memory_map (text
->data ());
11260 packet_command (const char *args
, int from_tty
)
11262 remote_target
*remote
= get_current_remote_target ();
11264 if (remote
== nullptr)
11265 error (_("command can only be used with remote target"));
11267 remote
->packet_command (args
, from_tty
);
11271 remote_target::packet_command (const char *args
, int from_tty
)
11274 error (_("remote-packet command requires packet text as argument"));
11276 puts_filtered ("sending: ");
11277 print_packet (args
);
11278 puts_filtered ("\n");
11281 remote_state
*rs
= get_remote_state ();
11283 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11284 puts_filtered ("received: ");
11285 print_packet (rs
->buf
);
11286 puts_filtered ("\n");
11290 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
11292 static void display_thread_info (struct gdb_ext_thread_info
*info
);
11294 static void threadset_test_cmd (char *cmd
, int tty
);
11296 static void threadalive_test (char *cmd
, int tty
);
11298 static void threadlist_test_cmd (char *cmd
, int tty
);
11300 int get_and_display_threadinfo (threadref
*ref
);
11302 static void threadinfo_test_cmd (char *cmd
, int tty
);
11304 static int thread_display_step (threadref
*ref
, void *context
);
11306 static void threadlist_update_test_cmd (char *cmd
, int tty
);
11308 static void init_remote_threadtests (void);
11310 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
11313 threadset_test_cmd (const char *cmd
, int tty
)
11315 int sample_thread
= SAMPLE_THREAD
;
11317 printf_filtered (_("Remote threadset test\n"));
11318 set_general_thread (sample_thread
);
11323 threadalive_test (const char *cmd
, int tty
)
11325 int sample_thread
= SAMPLE_THREAD
;
11326 int pid
= inferior_ptid
.pid ();
11327 ptid_t ptid
= ptid_t (pid
, sample_thread
, 0);
11329 if (remote_thread_alive (ptid
))
11330 printf_filtered ("PASS: Thread alive test\n");
11332 printf_filtered ("FAIL: Thread alive test\n");
11335 void output_threadid (char *title
, threadref
*ref
);
11338 output_threadid (char *title
, threadref
*ref
)
11342 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
11344 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
11348 threadlist_test_cmd (const char *cmd
, int tty
)
11351 threadref nextthread
;
11352 int done
, result_count
;
11353 threadref threadlist
[3];
11355 printf_filtered ("Remote Threadlist test\n");
11356 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
11357 &result_count
, &threadlist
[0]))
11358 printf_filtered ("FAIL: threadlist test\n");
11361 threadref
*scan
= threadlist
;
11362 threadref
*limit
= scan
+ result_count
;
11364 while (scan
< limit
)
11365 output_threadid (" thread ", scan
++);
11370 display_thread_info (struct gdb_ext_thread_info
*info
)
11372 output_threadid ("Threadid: ", &info
->threadid
);
11373 printf_filtered ("Name: %s\n ", info
->shortname
);
11374 printf_filtered ("State: %s\n", info
->display
);
11375 printf_filtered ("other: %s\n\n", info
->more_display
);
11379 get_and_display_threadinfo (threadref
*ref
)
11383 struct gdb_ext_thread_info threadinfo
;
11385 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
11386 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
11387 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
11388 display_thread_info (&threadinfo
);
11393 threadinfo_test_cmd (const char *cmd
, int tty
)
11395 int athread
= SAMPLE_THREAD
;
11399 int_to_threadref (&thread
, athread
);
11400 printf_filtered ("Remote Threadinfo test\n");
11401 if (!get_and_display_threadinfo (&thread
))
11402 printf_filtered ("FAIL cannot get thread info\n");
11406 thread_display_step (threadref
*ref
, void *context
)
11408 /* output_threadid(" threadstep ",ref); *//* simple test */
11409 return get_and_display_threadinfo (ref
);
11413 threadlist_update_test_cmd (const char *cmd
, int tty
)
11415 printf_filtered ("Remote Threadlist update test\n");
11416 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
11420 init_remote_threadtests (void)
11422 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
11423 _("Fetch and print the remote list of "
11424 "thread identifiers, one pkt only"));
11425 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
11426 _("Fetch and display info about one thread"));
11427 add_com ("tset", class_obscure
, threadset_test_cmd
,
11428 _("Test setting to a different thread"));
11429 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
11430 _("Iterate through updating all remote thread info"));
11431 add_com ("talive", class_obscure
, threadalive_test
,
11432 _(" Remote thread alive test "));
11437 /* Convert a thread ID to a string. Returns the string in a static
11441 remote_target::pid_to_str (ptid_t ptid
)
11443 static char buf
[64];
11444 struct remote_state
*rs
= get_remote_state ();
11446 if (ptid
== null_ptid
)
11447 return normal_pid_to_str (ptid
);
11448 else if (ptid
.is_pid ())
11450 /* Printing an inferior target id. */
11452 /* When multi-process extensions are off, there's no way in the
11453 remote protocol to know the remote process id, if there's any
11454 at all. There's one exception --- when we're connected with
11455 target extended-remote, and we manually attached to a process
11456 with "attach PID". We don't record anywhere a flag that
11457 allows us to distinguish that case from the case of
11458 connecting with extended-remote and the stub already being
11459 attached to a process, and reporting yes to qAttached, hence
11460 no smart special casing here. */
11461 if (!remote_multi_process_p (rs
))
11463 xsnprintf (buf
, sizeof buf
, "Remote target");
11467 return normal_pid_to_str (ptid
);
11471 if (magic_null_ptid
== ptid
)
11472 xsnprintf (buf
, sizeof buf
, "Thread <main>");
11473 else if (remote_multi_process_p (rs
))
11474 if (ptid
.lwp () == 0)
11475 return normal_pid_to_str (ptid
);
11477 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
11478 ptid
.pid (), ptid
.lwp ());
11480 xsnprintf (buf
, sizeof buf
, "Thread %ld",
11486 /* Get the address of the thread local variable in OBJFILE which is
11487 stored at OFFSET within the thread local storage for thread PTID. */
11490 remote_target::get_thread_local_address (ptid_t ptid
, CORE_ADDR lm
,
11493 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11495 struct remote_state
*rs
= get_remote_state ();
11497 char *endp
= rs
->buf
+ get_remote_packet_size ();
11498 enum packet_result result
;
11500 strcpy (p
, "qGetTLSAddr:");
11502 p
= write_ptid (p
, endp
, ptid
);
11504 p
+= hexnumstr (p
, offset
);
11506 p
+= hexnumstr (p
, lm
);
11510 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11511 result
= packet_ok (rs
->buf
,
11512 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11513 if (result
== PACKET_OK
)
11517 unpack_varlen_hex (rs
->buf
, &addr
);
11520 else if (result
== PACKET_UNKNOWN
)
11521 throw_error (TLS_GENERIC_ERROR
,
11522 _("Remote target doesn't support qGetTLSAddr packet"));
11524 throw_error (TLS_GENERIC_ERROR
,
11525 _("Remote target failed to process qGetTLSAddr request"));
11528 throw_error (TLS_GENERIC_ERROR
,
11529 _("TLS not supported or disabled on this target"));
11534 /* Provide thread local base, i.e. Thread Information Block address.
11535 Returns 1 if ptid is found and thread_local_base is non zero. */
11538 remote_target::get_tib_address (ptid_t ptid
, CORE_ADDR
*addr
)
11540 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11542 struct remote_state
*rs
= get_remote_state ();
11544 char *endp
= rs
->buf
+ get_remote_packet_size ();
11545 enum packet_result result
;
11547 strcpy (p
, "qGetTIBAddr:");
11549 p
= write_ptid (p
, endp
, ptid
);
11553 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11554 result
= packet_ok (rs
->buf
,
11555 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11556 if (result
== PACKET_OK
)
11559 unpack_varlen_hex (rs
->buf
, &val
);
11561 *addr
= (CORE_ADDR
) val
;
11564 else if (result
== PACKET_UNKNOWN
)
11565 error (_("Remote target doesn't support qGetTIBAddr packet"));
11567 error (_("Remote target failed to process qGetTIBAddr request"));
11570 error (_("qGetTIBAddr not supported or disabled on this target"));
11575 /* Support for inferring a target description based on the current
11576 architecture and the size of a 'g' packet. While the 'g' packet
11577 can have any size (since optional registers can be left off the
11578 end), some sizes are easily recognizable given knowledge of the
11579 approximate architecture. */
11581 struct remote_g_packet_guess
11583 remote_g_packet_guess (int bytes_
, const struct target_desc
*tdesc_
)
11590 const struct target_desc
*tdesc
;
11593 struct remote_g_packet_data
: public allocate_on_obstack
11595 std::vector
<remote_g_packet_guess
> guesses
;
11598 static struct gdbarch_data
*remote_g_packet_data_handle
;
11601 remote_g_packet_data_init (struct obstack
*obstack
)
11603 return new (obstack
) remote_g_packet_data
;
11607 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11608 const struct target_desc
*tdesc
)
11610 struct remote_g_packet_data
*data
11611 = ((struct remote_g_packet_data
*)
11612 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11614 gdb_assert (tdesc
!= NULL
);
11616 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11617 if (guess
.bytes
== bytes
)
11618 internal_error (__FILE__
, __LINE__
,
11619 _("Duplicate g packet description added for size %d"),
11622 data
->guesses
.emplace_back (bytes
, tdesc
);
11625 /* Return true if remote_read_description would do anything on this target
11626 and architecture, false otherwise. */
11629 remote_read_description_p (struct target_ops
*target
)
11631 struct remote_g_packet_data
*data
11632 = ((struct remote_g_packet_data
*)
11633 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11635 return !data
->guesses
.empty ();
11638 const struct target_desc
*
11639 remote_target::read_description ()
11641 struct remote_g_packet_data
*data
11642 = ((struct remote_g_packet_data
*)
11643 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11645 /* Do not try this during initial connection, when we do not know
11646 whether there is a running but stopped thread. */
11647 if (!target_has_execution
|| inferior_ptid
== null_ptid
)
11648 return beneath ()->read_description ();
11650 if (!data
->guesses
.empty ())
11652 int bytes
= send_g_packet ();
11654 for (const remote_g_packet_guess
&guess
: data
->guesses
)
11655 if (guess
.bytes
== bytes
)
11656 return guess
.tdesc
;
11658 /* We discard the g packet. A minor optimization would be to
11659 hold on to it, and fill the register cache once we have selected
11660 an architecture, but it's too tricky to do safely. */
11663 return beneath ()->read_description ();
11666 /* Remote file transfer support. This is host-initiated I/O, not
11667 target-initiated; for target-initiated, see remote-fileio.c. */
11669 /* If *LEFT is at least the length of STRING, copy STRING to
11670 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11671 decrease *LEFT. Otherwise raise an error. */
11674 remote_buffer_add_string (char **buffer
, int *left
, const char *string
)
11676 int len
= strlen (string
);
11679 error (_("Packet too long for target."));
11681 memcpy (*buffer
, string
, len
);
11685 /* NUL-terminate the buffer as a convenience, if there is
11691 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11692 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11693 decrease *LEFT. Otherwise raise an error. */
11696 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11699 if (2 * len
> *left
)
11700 error (_("Packet too long for target."));
11702 bin2hex (bytes
, *buffer
, len
);
11703 *buffer
+= 2 * len
;
11706 /* NUL-terminate the buffer as a convenience, if there is
11712 /* If *LEFT is large enough, convert VALUE to hex and add it to
11713 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11714 decrease *LEFT. Otherwise raise an error. */
11717 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11719 int len
= hexnumlen (value
);
11722 error (_("Packet too long for target."));
11724 hexnumstr (*buffer
, value
);
11728 /* NUL-terminate the buffer as a convenience, if there is
11734 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11735 value, *REMOTE_ERRNO to the remote error number or zero if none
11736 was included, and *ATTACHMENT to point to the start of the annex
11737 if any. The length of the packet isn't needed here; there may
11738 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11740 Return 0 if the packet could be parsed, -1 if it could not. If
11741 -1 is returned, the other variables may not be initialized. */
11744 remote_hostio_parse_result (char *buffer
, int *retcode
,
11745 int *remote_errno
, char **attachment
)
11750 *attachment
= NULL
;
11752 if (buffer
[0] != 'F')
11756 *retcode
= strtol (&buffer
[1], &p
, 16);
11757 if (errno
!= 0 || p
== &buffer
[1])
11760 /* Check for ",errno". */
11764 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11765 if (errno
!= 0 || p
+ 1 == p2
)
11770 /* Check for ";attachment". If there is no attachment, the
11771 packet should end here. */
11774 *attachment
= p
+ 1;
11777 else if (*p
== '\0')
11783 /* Send a prepared I/O packet to the target and read its response.
11784 The prepared packet is in the global RS->BUF before this function
11785 is called, and the answer is there when we return.
11787 COMMAND_BYTES is the length of the request to send, which may include
11788 binary data. WHICH_PACKET is the packet configuration to check
11789 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11790 is set to the error number and -1 is returned. Otherwise the value
11791 returned by the function is returned.
11793 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11794 attachment is expected; an error will be reported if there's a
11795 mismatch. If one is found, *ATTACHMENT will be set to point into
11796 the packet buffer and *ATTACHMENT_LEN will be set to the
11797 attachment's length. */
11800 remote_target::remote_hostio_send_command (int command_bytes
, int which_packet
,
11801 int *remote_errno
, char **attachment
,
11802 int *attachment_len
)
11804 struct remote_state
*rs
= get_remote_state ();
11805 int ret
, bytes_read
;
11806 char *attachment_tmp
;
11808 if (packet_support (which_packet
) == PACKET_DISABLE
)
11810 *remote_errno
= FILEIO_ENOSYS
;
11814 putpkt_binary (rs
->buf
, command_bytes
);
11815 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11817 /* If it timed out, something is wrong. Don't try to parse the
11819 if (bytes_read
< 0)
11821 *remote_errno
= FILEIO_EINVAL
;
11825 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11828 *remote_errno
= FILEIO_EINVAL
;
11830 case PACKET_UNKNOWN
:
11831 *remote_errno
= FILEIO_ENOSYS
;
11837 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11840 *remote_errno
= FILEIO_EINVAL
;
11844 /* Make sure we saw an attachment if and only if we expected one. */
11845 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11846 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11848 *remote_errno
= FILEIO_EINVAL
;
11852 /* If an attachment was found, it must point into the packet buffer;
11853 work out how many bytes there were. */
11854 if (attachment_tmp
!= NULL
)
11856 *attachment
= attachment_tmp
;
11857 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11863 /* See declaration.h. */
11866 readahead_cache::invalidate ()
11871 /* See declaration.h. */
11874 readahead_cache::invalidate_fd (int fd
)
11876 if (this->fd
== fd
)
11880 /* Set the filesystem remote_hostio functions that take FILENAME
11881 arguments will use. Return 0 on success, or -1 if an error
11882 occurs (and set *REMOTE_ERRNO). */
11885 remote_target::remote_hostio_set_filesystem (struct inferior
*inf
,
11888 struct remote_state
*rs
= get_remote_state ();
11889 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11891 int left
= get_remote_packet_size () - 1;
11895 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11898 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11901 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11903 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11904 remote_buffer_add_string (&p
, &left
, arg
);
11906 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11907 remote_errno
, NULL
, NULL
);
11909 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11913 rs
->fs_pid
= required_pid
;
11918 /* Implementation of to_fileio_open. */
11921 remote_target::remote_hostio_open (inferior
*inf
, const char *filename
,
11922 int flags
, int mode
, int warn_if_slow
,
11925 struct remote_state
*rs
= get_remote_state ();
11927 int left
= get_remote_packet_size () - 1;
11931 static int warning_issued
= 0;
11933 printf_unfiltered (_("Reading %s from remote target...\n"),
11936 if (!warning_issued
)
11938 warning (_("File transfers from remote targets can be slow."
11939 " Use \"set sysroot\" to access files locally"
11941 warning_issued
= 1;
11945 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11948 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11950 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11951 strlen (filename
));
11952 remote_buffer_add_string (&p
, &left
, ",");
11954 remote_buffer_add_int (&p
, &left
, flags
);
11955 remote_buffer_add_string (&p
, &left
, ",");
11957 remote_buffer_add_int (&p
, &left
, mode
);
11959 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11960 remote_errno
, NULL
, NULL
);
11964 remote_target::fileio_open (struct inferior
*inf
, const char *filename
,
11965 int flags
, int mode
, int warn_if_slow
,
11968 return remote_hostio_open (inf
, filename
, flags
, mode
, warn_if_slow
,
11972 /* Implementation of to_fileio_pwrite. */
11975 remote_target::remote_hostio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
11976 ULONGEST offset
, int *remote_errno
)
11978 struct remote_state
*rs
= get_remote_state ();
11980 int left
= get_remote_packet_size ();
11983 rs
->readahead_cache
.invalidate_fd (fd
);
11985 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11987 remote_buffer_add_int (&p
, &left
, fd
);
11988 remote_buffer_add_string (&p
, &left
, ",");
11990 remote_buffer_add_int (&p
, &left
, offset
);
11991 remote_buffer_add_string (&p
, &left
, ",");
11993 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11994 get_remote_packet_size () - (p
- rs
->buf
));
11996 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11997 remote_errno
, NULL
, NULL
);
12001 remote_target::fileio_pwrite (int fd
, const gdb_byte
*write_buf
, int len
,
12002 ULONGEST offset
, int *remote_errno
)
12004 return remote_hostio_pwrite (fd
, write_buf
, len
, offset
, remote_errno
);
12007 /* Helper for the implementation of to_fileio_pread. Read the file
12008 from the remote side with vFile:pread. */
12011 remote_target::remote_hostio_pread_vFile (int fd
, gdb_byte
*read_buf
, int len
,
12012 ULONGEST offset
, int *remote_errno
)
12014 struct remote_state
*rs
= get_remote_state ();
12017 int left
= get_remote_packet_size ();
12018 int ret
, attachment_len
;
12021 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
12023 remote_buffer_add_int (&p
, &left
, fd
);
12024 remote_buffer_add_string (&p
, &left
, ",");
12026 remote_buffer_add_int (&p
, &left
, len
);
12027 remote_buffer_add_string (&p
, &left
, ",");
12029 remote_buffer_add_int (&p
, &left
, offset
);
12031 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
12032 remote_errno
, &attachment
,
12038 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12040 if (read_len
!= ret
)
12041 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
12046 /* See declaration.h. */
12049 readahead_cache::pread (int fd
, gdb_byte
*read_buf
, size_t len
,
12053 && this->offset
<= offset
12054 && offset
< this->offset
+ this->bufsize
)
12056 ULONGEST max
= this->offset
+ this->bufsize
;
12058 if (offset
+ len
> max
)
12059 len
= max
- offset
;
12061 memcpy (read_buf
, this->buf
+ offset
- this->offset
, len
);
12068 /* Implementation of to_fileio_pread. */
12071 remote_target::remote_hostio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12072 ULONGEST offset
, int *remote_errno
)
12075 struct remote_state
*rs
= get_remote_state ();
12076 readahead_cache
*cache
= &rs
->readahead_cache
;
12078 ret
= cache
->pread (fd
, read_buf
, len
, offset
);
12081 cache
->hit_count
++;
12084 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
12085 pulongest (cache
->hit_count
));
12089 cache
->miss_count
++;
12091 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
12092 pulongest (cache
->miss_count
));
12095 cache
->offset
= offset
;
12096 cache
->bufsize
= get_remote_packet_size ();
12097 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
12099 ret
= remote_hostio_pread_vFile (cache
->fd
, cache
->buf
, cache
->bufsize
,
12100 cache
->offset
, remote_errno
);
12103 cache
->invalidate_fd (fd
);
12107 cache
->bufsize
= ret
;
12108 return cache
->pread (fd
, read_buf
, len
, offset
);
12112 remote_target::fileio_pread (int fd
, gdb_byte
*read_buf
, int len
,
12113 ULONGEST offset
, int *remote_errno
)
12115 return remote_hostio_pread (fd
, read_buf
, len
, offset
, remote_errno
);
12118 /* Implementation of to_fileio_close. */
12121 remote_target::remote_hostio_close (int fd
, int *remote_errno
)
12123 struct remote_state
*rs
= get_remote_state ();
12125 int left
= get_remote_packet_size () - 1;
12127 rs
->readahead_cache
.invalidate_fd (fd
);
12129 remote_buffer_add_string (&p
, &left
, "vFile:close:");
12131 remote_buffer_add_int (&p
, &left
, fd
);
12133 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
12134 remote_errno
, NULL
, NULL
);
12138 remote_target::fileio_close (int fd
, int *remote_errno
)
12140 return remote_hostio_close (fd
, remote_errno
);
12143 /* Implementation of to_fileio_unlink. */
12146 remote_target::remote_hostio_unlink (inferior
*inf
, const char *filename
,
12149 struct remote_state
*rs
= get_remote_state ();
12151 int left
= get_remote_packet_size () - 1;
12153 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12156 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
12158 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12159 strlen (filename
));
12161 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
12162 remote_errno
, NULL
, NULL
);
12166 remote_target::fileio_unlink (struct inferior
*inf
, const char *filename
,
12169 return remote_hostio_unlink (inf
, filename
, remote_errno
);
12172 /* Implementation of to_fileio_readlink. */
12174 gdb::optional
<std::string
>
12175 remote_target::fileio_readlink (struct inferior
*inf
, const char *filename
,
12178 struct remote_state
*rs
= get_remote_state ();
12181 int left
= get_remote_packet_size ();
12182 int len
, attachment_len
;
12185 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
12188 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
12190 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
12191 strlen (filename
));
12193 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
12194 remote_errno
, &attachment
,
12200 std::string
ret (len
, '\0');
12202 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12203 (gdb_byte
*) &ret
[0], len
);
12204 if (read_len
!= len
)
12205 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
12210 /* Implementation of to_fileio_fstat. */
12213 remote_target::fileio_fstat (int fd
, struct stat
*st
, int *remote_errno
)
12215 struct remote_state
*rs
= get_remote_state ();
12217 int left
= get_remote_packet_size ();
12218 int attachment_len
, ret
;
12220 struct fio_stat fst
;
12223 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
12225 remote_buffer_add_int (&p
, &left
, fd
);
12227 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
12228 remote_errno
, &attachment
,
12232 if (*remote_errno
!= FILEIO_ENOSYS
)
12235 /* Strictly we should return -1, ENOSYS here, but when
12236 "set sysroot remote:" was implemented in August 2008
12237 BFD's need for a stat function was sidestepped with
12238 this hack. This was not remedied until March 2015
12239 so we retain the previous behavior to avoid breaking
12242 Note that the memset is a March 2015 addition; older
12243 GDBs set st_size *and nothing else* so the structure
12244 would have garbage in all other fields. This might
12245 break something but retaining the previous behavior
12246 here would be just too wrong. */
12248 memset (st
, 0, sizeof (struct stat
));
12249 st
->st_size
= INT_MAX
;
12253 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
12254 (gdb_byte
*) &fst
, sizeof (fst
));
12256 if (read_len
!= ret
)
12257 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
12259 if (read_len
!= sizeof (fst
))
12260 error (_("vFile:fstat returned %d bytes, but expecting %d."),
12261 read_len
, (int) sizeof (fst
));
12263 remote_fileio_to_host_stat (&fst
, st
);
12268 /* Implementation of to_filesystem_is_local. */
12271 remote_target::filesystem_is_local ()
12273 /* Valgrind GDB presents itself as a remote target but works
12274 on the local filesystem: it does not implement remote get
12275 and users are not expected to set a sysroot. To handle
12276 this case we treat the remote filesystem as local if the
12277 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
12278 does not support vFile:open. */
12279 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
12281 enum packet_support ps
= packet_support (PACKET_vFile_open
);
12283 if (ps
== PACKET_SUPPORT_UNKNOWN
)
12285 int fd
, remote_errno
;
12287 /* Try opening a file to probe support. The supplied
12288 filename is irrelevant, we only care about whether
12289 the stub recognizes the packet or not. */
12290 fd
= remote_hostio_open (NULL
, "just probing",
12291 FILEIO_O_RDONLY
, 0700, 0,
12295 remote_hostio_close (fd
, &remote_errno
);
12297 ps
= packet_support (PACKET_vFile_open
);
12300 if (ps
== PACKET_DISABLE
)
12302 static int warning_issued
= 0;
12304 if (!warning_issued
)
12306 warning (_("remote target does not support file"
12307 " transfer, attempting to access files"
12308 " from local filesystem."));
12309 warning_issued
= 1;
12320 remote_fileio_errno_to_host (int errnum
)
12326 case FILEIO_ENOENT
:
12334 case FILEIO_EACCES
:
12336 case FILEIO_EFAULT
:
12340 case FILEIO_EEXIST
:
12342 case FILEIO_ENODEV
:
12344 case FILEIO_ENOTDIR
:
12346 case FILEIO_EISDIR
:
12348 case FILEIO_EINVAL
:
12350 case FILEIO_ENFILE
:
12352 case FILEIO_EMFILE
:
12356 case FILEIO_ENOSPC
:
12358 case FILEIO_ESPIPE
:
12362 case FILEIO_ENOSYS
:
12364 case FILEIO_ENAMETOOLONG
:
12365 return ENAMETOOLONG
;
12371 remote_hostio_error (int errnum
)
12373 int host_error
= remote_fileio_errno_to_host (errnum
);
12375 if (host_error
== -1)
12376 error (_("Unknown remote I/O error %d"), errnum
);
12378 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
12381 /* A RAII wrapper around a remote file descriptor. */
12383 class scoped_remote_fd
12386 scoped_remote_fd (remote_target
*remote
, int fd
)
12387 : m_remote (remote
), m_fd (fd
)
12391 ~scoped_remote_fd ()
12398 m_remote
->remote_hostio_close (m_fd
, &remote_errno
);
12402 /* Swallow exception before it escapes the dtor. If
12403 something goes wrong, likely the connection is gone,
12404 and there's nothing else that can be done. */
12409 DISABLE_COPY_AND_ASSIGN (scoped_remote_fd
);
12411 /* Release ownership of the file descriptor, and return it. */
12412 int release () noexcept
12419 /* Return the owned file descriptor. */
12420 int get () const noexcept
12426 /* The remote target. */
12427 remote_target
*m_remote
;
12429 /* The owned remote I/O file descriptor. */
12434 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
12436 remote_target
*remote
= get_current_remote_target ();
12438 if (remote
== nullptr)
12439 error (_("command can only be used with remote target"));
12441 remote
->remote_file_put (local_file
, remote_file
, from_tty
);
12445 remote_target::remote_file_put (const char *local_file
, const char *remote_file
,
12448 int retcode
, remote_errno
, bytes
, io_size
;
12449 int bytes_in_buffer
;
12453 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "rb");
12455 perror_with_name (local_file
);
12457 scoped_remote_fd fd
12458 (this, remote_hostio_open (NULL
,
12459 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
12461 0700, 0, &remote_errno
));
12462 if (fd
.get () == -1)
12463 remote_hostio_error (remote_errno
);
12465 /* Send up to this many bytes at once. They won't all fit in the
12466 remote packet limit, so we'll transfer slightly fewer. */
12467 io_size
= get_remote_packet_size ();
12468 gdb::byte_vector
buffer (io_size
);
12470 bytes_in_buffer
= 0;
12473 while (bytes_in_buffer
|| !saw_eof
)
12477 bytes
= fread (buffer
.data () + bytes_in_buffer
, 1,
12478 io_size
- bytes_in_buffer
,
12482 if (ferror (file
.get ()))
12483 error (_("Error reading %s."), local_file
);
12486 /* EOF. Unless there is something still in the
12487 buffer from the last iteration, we are done. */
12489 if (bytes_in_buffer
== 0)
12497 bytes
+= bytes_in_buffer
;
12498 bytes_in_buffer
= 0;
12500 retcode
= remote_hostio_pwrite (fd
.get (), buffer
.data (), bytes
,
12501 offset
, &remote_errno
);
12504 remote_hostio_error (remote_errno
);
12505 else if (retcode
== 0)
12506 error (_("Remote write of %d bytes returned 0!"), bytes
);
12507 else if (retcode
< bytes
)
12509 /* Short write. Save the rest of the read data for the next
12511 bytes_in_buffer
= bytes
- retcode
;
12512 memmove (buffer
.data (), buffer
.data () + retcode
, bytes_in_buffer
);
12518 if (remote_hostio_close (fd
.release (), &remote_errno
))
12519 remote_hostio_error (remote_errno
);
12522 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
12526 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
12528 remote_target
*remote
= get_current_remote_target ();
12530 if (remote
== nullptr)
12531 error (_("command can only be used with remote target"));
12533 remote
->remote_file_get (remote_file
, local_file
, from_tty
);
12537 remote_target::remote_file_get (const char *remote_file
, const char *local_file
,
12540 int remote_errno
, bytes
, io_size
;
12543 scoped_remote_fd fd
12544 (this, remote_hostio_open (NULL
,
12545 remote_file
, FILEIO_O_RDONLY
, 0, 0,
12547 if (fd
.get () == -1)
12548 remote_hostio_error (remote_errno
);
12550 gdb_file_up file
= gdb_fopen_cloexec (local_file
, "wb");
12552 perror_with_name (local_file
);
12554 /* Send up to this many bytes at once. They won't all fit in the
12555 remote packet limit, so we'll transfer slightly fewer. */
12556 io_size
= get_remote_packet_size ();
12557 gdb::byte_vector
buffer (io_size
);
12562 bytes
= remote_hostio_pread (fd
.get (), buffer
.data (), io_size
, offset
,
12565 /* Success, but no bytes, means end-of-file. */
12568 remote_hostio_error (remote_errno
);
12572 bytes
= fwrite (buffer
.data (), 1, bytes
, file
.get ());
12574 perror_with_name (local_file
);
12577 if (remote_hostio_close (fd
.release (), &remote_errno
))
12578 remote_hostio_error (remote_errno
);
12581 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12585 remote_file_delete (const char *remote_file
, int from_tty
)
12587 remote_target
*remote
= get_current_remote_target ();
12589 if (remote
== nullptr)
12590 error (_("command can only be used with remote target"));
12592 remote
->remote_file_delete (remote_file
, from_tty
);
12596 remote_target::remote_file_delete (const char *remote_file
, int from_tty
)
12598 int retcode
, remote_errno
;
12600 retcode
= remote_hostio_unlink (NULL
, remote_file
, &remote_errno
);
12602 remote_hostio_error (remote_errno
);
12605 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12609 remote_put_command (const char *args
, int from_tty
)
12612 error_no_arg (_("file to put"));
12614 gdb_argv
argv (args
);
12615 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12616 error (_("Invalid parameters to remote put"));
12618 remote_file_put (argv
[0], argv
[1], from_tty
);
12622 remote_get_command (const char *args
, int from_tty
)
12625 error_no_arg (_("file to get"));
12627 gdb_argv
argv (args
);
12628 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12629 error (_("Invalid parameters to remote get"));
12631 remote_file_get (argv
[0], argv
[1], from_tty
);
12635 remote_delete_command (const char *args
, int from_tty
)
12638 error_no_arg (_("file to delete"));
12640 gdb_argv
argv (args
);
12641 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12642 error (_("Invalid parameters to remote delete"));
12644 remote_file_delete (argv
[0], from_tty
);
12648 remote_command (const char *args
, int from_tty
)
12650 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12654 remote_target::can_execute_reverse ()
12656 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12657 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12664 remote_target::supports_non_stop ()
12670 remote_target::supports_disable_randomization ()
12672 /* Only supported in extended mode. */
12677 remote_target::supports_multi_process ()
12679 struct remote_state
*rs
= get_remote_state ();
12681 return remote_multi_process_p (rs
);
12685 remote_supports_cond_tracepoints ()
12687 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12691 remote_target::supports_evaluation_of_breakpoint_conditions ()
12693 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12697 remote_supports_fast_tracepoints ()
12699 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12703 remote_supports_static_tracepoints ()
12705 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12709 remote_supports_install_in_trace ()
12711 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12715 remote_target::supports_enable_disable_tracepoint ()
12717 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12722 remote_target::supports_string_tracing ()
12724 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12728 remote_target::can_run_breakpoint_commands ()
12730 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12734 remote_target::trace_init ()
12736 struct remote_state
*rs
= get_remote_state ();
12739 remote_get_noisy_reply ();
12740 if (strcmp (rs
->buf
, "OK") != 0)
12741 error (_("Target does not support this command."));
12744 /* Recursive routine to walk through command list including loops, and
12745 download packets for each command. */
12748 remote_target::remote_download_command_source (int num
, ULONGEST addr
,
12749 struct command_line
*cmds
)
12751 struct remote_state
*rs
= get_remote_state ();
12752 struct command_line
*cmd
;
12754 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12756 QUIT
; /* Allow user to bail out with ^C. */
12757 strcpy (rs
->buf
, "QTDPsrc:");
12758 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12759 rs
->buf
+ strlen (rs
->buf
),
12760 rs
->buf_size
- strlen (rs
->buf
));
12762 remote_get_noisy_reply ();
12763 if (strcmp (rs
->buf
, "OK"))
12764 warning (_("Target does not support source download."));
12766 if (cmd
->control_type
== while_control
12767 || cmd
->control_type
== while_stepping_control
)
12769 remote_download_command_source (num
, addr
, cmd
->body_list_0
.get ());
12771 QUIT
; /* Allow user to bail out with ^C. */
12772 strcpy (rs
->buf
, "QTDPsrc:");
12773 encode_source_string (num
, addr
, "cmd", "end",
12774 rs
->buf
+ strlen (rs
->buf
),
12775 rs
->buf_size
- strlen (rs
->buf
));
12777 remote_get_noisy_reply ();
12778 if (strcmp (rs
->buf
, "OK"))
12779 warning (_("Target does not support source download."));
12785 remote_target::download_tracepoint (struct bp_location
*loc
)
12789 std::vector
<std::string
> tdp_actions
;
12790 std::vector
<std::string
> stepping_actions
;
12792 struct breakpoint
*b
= loc
->owner
;
12793 struct tracepoint
*t
= (struct tracepoint
*) b
;
12794 struct remote_state
*rs
= get_remote_state ();
12796 const char *err_msg
= _("Tracepoint packet too large for target.");
12799 /* We use a buffer other than rs->buf because we'll build strings
12800 across multiple statements, and other statements in between could
12802 gdb::char_vector
buf (get_remote_packet_size ());
12804 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12806 tpaddr
= loc
->address
;
12807 sprintf_vma (addrbuf
, tpaddr
);
12808 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:%x:%s:%c:%lx:%x",
12809 b
->number
, addrbuf
, /* address */
12810 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12811 t
->step_count
, t
->pass_count
);
12813 if (ret
< 0 || ret
>= buf
.size ())
12814 error ("%s", err_msg
);
12816 /* Fast tracepoints are mostly handled by the target, but we can
12817 tell the target how big of an instruction block should be moved
12819 if (b
->type
== bp_fast_tracepoint
)
12821 /* Only test for support at download time; we may not know
12822 target capabilities at definition time. */
12823 if (remote_supports_fast_tracepoints ())
12825 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12828 size_left
= buf
.size () - strlen (buf
.data ());
12829 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12831 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12833 if (ret
< 0 || ret
>= size_left
)
12834 error ("%s", err_msg
);
12837 /* If it passed validation at definition but fails now,
12838 something is very wrong. */
12839 internal_error (__FILE__
, __LINE__
,
12840 _("Fast tracepoint not "
12841 "valid during download"));
12844 /* Fast tracepoints are functionally identical to regular
12845 tracepoints, so don't take lack of support as a reason to
12846 give up on the trace run. */
12847 warning (_("Target does not support fast tracepoints, "
12848 "downloading %d as regular tracepoint"), b
->number
);
12850 else if (b
->type
== bp_static_tracepoint
)
12852 /* Only test for support at download time; we may not know
12853 target capabilities at definition time. */
12854 if (remote_supports_static_tracepoints ())
12856 struct static_tracepoint_marker marker
;
12858 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12860 size_left
= buf
.size () - strlen (buf
.data ());
12861 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12864 if (ret
< 0 || ret
>= size_left
)
12865 error ("%s", err_msg
);
12868 error (_("Static tracepoint not valid during download"));
12871 /* Fast tracepoints are functionally identical to regular
12872 tracepoints, so don't take lack of support as a reason
12873 to give up on the trace run. */
12874 error (_("Target does not support static tracepoints"));
12876 /* If the tracepoint has a conditional, make it into an agent
12877 expression and append to the definition. */
12880 /* Only test support at download time, we may not know target
12881 capabilities at definition time. */
12882 if (remote_supports_cond_tracepoints ())
12884 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
,
12887 size_left
= buf
.size () - strlen (buf
.data ());
12889 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12890 size_left
, ":X%x,", aexpr
->len
);
12892 if (ret
< 0 || ret
>= size_left
)
12893 error ("%s", err_msg
);
12895 size_left
= buf
.size () - strlen (buf
.data ());
12897 /* Two bytes to encode each aexpr byte, plus the terminating
12899 if (aexpr
->len
* 2 + 1 > size_left
)
12900 error ("%s", err_msg
);
12902 pkt
= buf
.data () + strlen (buf
.data ());
12904 for (int ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12905 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12909 warning (_("Target does not support conditional tracepoints, "
12910 "ignoring tp %d cond"), b
->number
);
12913 if (b
->commands
|| *default_collect
)
12915 size_left
= buf
.size () - strlen (buf
.data ());
12917 ret
= snprintf (buf
.data () + strlen (buf
.data ()),
12920 if (ret
< 0 || ret
>= size_left
)
12921 error ("%s", err_msg
);
12924 putpkt (buf
.data ());
12925 remote_get_noisy_reply ();
12926 if (strcmp (rs
->buf
, "OK"))
12927 error (_("Target does not support tracepoints."));
12929 /* do_single_steps (t); */
12930 for (auto action_it
= tdp_actions
.begin ();
12931 action_it
!= tdp_actions
.end (); action_it
++)
12933 QUIT
; /* Allow user to bail out with ^C. */
12935 bool has_more
= ((action_it
+ 1) != tdp_actions
.end ()
12936 || !stepping_actions
.empty ());
12938 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%c",
12939 b
->number
, addrbuf
, /* address */
12940 action_it
->c_str (),
12941 has_more
? '-' : 0);
12943 if (ret
< 0 || ret
>= buf
.size ())
12944 error ("%s", err_msg
);
12946 putpkt (buf
.data ());
12947 remote_get_noisy_reply ();
12948 if (strcmp (rs
->buf
, "OK"))
12949 error (_("Error on target while setting tracepoints."));
12952 for (auto action_it
= stepping_actions
.begin ();
12953 action_it
!= stepping_actions
.end (); action_it
++)
12955 QUIT
; /* Allow user to bail out with ^C. */
12957 bool is_first
= action_it
== stepping_actions
.begin ();
12958 bool has_more
= (action_it
+ 1) != stepping_actions
.end ();
12960 ret
= snprintf (buf
.data (), buf
.size (), "QTDP:-%x:%s:%s%s%s",
12961 b
->number
, addrbuf
, /* address */
12962 is_first
? "S" : "",
12963 action_it
->c_str (),
12964 has_more
? "-" : "");
12966 if (ret
< 0 || ret
>= buf
.size ())
12967 error ("%s", err_msg
);
12969 putpkt (buf
.data ());
12970 remote_get_noisy_reply ();
12971 if (strcmp (rs
->buf
, "OK"))
12972 error (_("Error on target while setting tracepoints."));
12975 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12977 if (b
->location
!= NULL
)
12979 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
12981 if (ret
< 0 || ret
>= buf
.size ())
12982 error ("%s", err_msg
);
12984 encode_source_string (b
->number
, loc
->address
, "at",
12985 event_location_to_string (b
->location
.get ()),
12986 buf
.data () + strlen (buf
.data ()),
12987 buf
.size () - strlen (buf
.data ()));
12988 putpkt (buf
.data ());
12989 remote_get_noisy_reply ();
12990 if (strcmp (rs
->buf
, "OK"))
12991 warning (_("Target does not support source download."));
12993 if (b
->cond_string
)
12995 ret
= snprintf (buf
.data (), buf
.size (), "QTDPsrc:");
12997 if (ret
< 0 || ret
>= buf
.size ())
12998 error ("%s", err_msg
);
13000 encode_source_string (b
->number
, loc
->address
,
13001 "cond", b
->cond_string
,
13002 buf
.data () + strlen (buf
.data ()),
13003 buf
.size () - strlen (buf
.data ()));
13004 putpkt (buf
.data ());
13005 remote_get_noisy_reply ();
13006 if (strcmp (rs
->buf
, "OK"))
13007 warning (_("Target does not support source download."));
13009 remote_download_command_source (b
->number
, loc
->address
,
13010 breakpoint_commands (b
));
13015 remote_target::can_download_tracepoint ()
13017 struct remote_state
*rs
= get_remote_state ();
13018 struct trace_status
*ts
;
13021 /* Don't try to install tracepoints until we've relocated our
13022 symbols, and fetched and merged the target's tracepoint list with
13024 if (rs
->starting_up
)
13027 ts
= current_trace_status ();
13028 status
= get_trace_status (ts
);
13030 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
13033 /* If we are in a tracing experiment, but remote stub doesn't support
13034 installing tracepoint in trace, we have to return. */
13035 if (!remote_supports_install_in_trace ())
13043 remote_target::download_trace_state_variable (const trace_state_variable
&tsv
)
13045 struct remote_state
*rs
= get_remote_state ();
13048 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
13049 tsv
.number
, phex ((ULONGEST
) tsv
.initial_value
, 8),
13051 p
= rs
->buf
+ strlen (rs
->buf
);
13052 if ((p
- rs
->buf
) + tsv
.name
.length () * 2 >= get_remote_packet_size ())
13053 error (_("Trace state variable name too long for tsv definition packet"));
13054 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
.name
.data ()), p
, tsv
.name
.length ());
13057 remote_get_noisy_reply ();
13058 if (*rs
->buf
== '\0')
13059 error (_("Target does not support this command."));
13060 if (strcmp (rs
->buf
, "OK") != 0)
13061 error (_("Error on target while downloading trace state variable."));
13065 remote_target::enable_tracepoint (struct bp_location
*location
)
13067 struct remote_state
*rs
= get_remote_state ();
13070 sprintf_vma (addr_buf
, location
->address
);
13071 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
13072 location
->owner
->number
, addr_buf
);
13074 remote_get_noisy_reply ();
13075 if (*rs
->buf
== '\0')
13076 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
13077 if (strcmp (rs
->buf
, "OK") != 0)
13078 error (_("Error on target while enabling tracepoint."));
13082 remote_target::disable_tracepoint (struct bp_location
*location
)
13084 struct remote_state
*rs
= get_remote_state ();
13087 sprintf_vma (addr_buf
, location
->address
);
13088 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
13089 location
->owner
->number
, addr_buf
);
13091 remote_get_noisy_reply ();
13092 if (*rs
->buf
== '\0')
13093 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
13094 if (strcmp (rs
->buf
, "OK") != 0)
13095 error (_("Error on target while disabling tracepoint."));
13099 remote_target::trace_set_readonly_regions ()
13103 bfd_size_type size
;
13109 return; /* No information to give. */
13111 struct remote_state
*rs
= get_remote_state ();
13113 strcpy (rs
->buf
, "QTro");
13114 offset
= strlen (rs
->buf
);
13115 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
13117 char tmp1
[40], tmp2
[40];
13120 if ((s
->flags
& SEC_LOAD
) == 0 ||
13121 /* (s->flags & SEC_CODE) == 0 || */
13122 (s
->flags
& SEC_READONLY
) == 0)
13126 vma
= bfd_get_section_vma (abfd
, s
);
13127 size
= bfd_get_section_size (s
);
13128 sprintf_vma (tmp1
, vma
);
13129 sprintf_vma (tmp2
, vma
+ size
);
13130 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
13131 if (offset
+ sec_length
+ 1 > rs
->buf_size
)
13133 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
13135 Too many sections for read-only sections definition packet."));
13138 xsnprintf (rs
->buf
+ offset
, rs
->buf_size
- offset
, ":%s,%s",
13140 offset
+= sec_length
;
13145 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13150 remote_target::trace_start ()
13152 struct remote_state
*rs
= get_remote_state ();
13154 putpkt ("QTStart");
13155 remote_get_noisy_reply ();
13156 if (*rs
->buf
== '\0')
13157 error (_("Target does not support this command."));
13158 if (strcmp (rs
->buf
, "OK") != 0)
13159 error (_("Bogus reply from target: %s"), rs
->buf
);
13163 remote_target::get_trace_status (struct trace_status
*ts
)
13165 /* Initialize it just to avoid a GCC false warning. */
13167 /* FIXME we need to get register block size some other way. */
13168 extern int trace_regblock_size
;
13169 enum packet_result result
;
13170 struct remote_state
*rs
= get_remote_state ();
13172 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
13175 trace_regblock_size
13176 = rs
->get_remote_arch_state (target_gdbarch ())->sizeof_g_packet
;
13178 putpkt ("qTStatus");
13182 p
= remote_get_noisy_reply ();
13184 CATCH (ex
, RETURN_MASK_ERROR
)
13186 if (ex
.error
!= TARGET_CLOSE_ERROR
)
13188 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
13191 throw_exception (ex
);
13195 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
13197 /* If the remote target doesn't do tracing, flag it. */
13198 if (result
== PACKET_UNKNOWN
)
13201 /* We're working with a live target. */
13202 ts
->filename
= NULL
;
13205 error (_("Bogus trace status reply from target: %s"), rs
->buf
);
13207 /* Function 'parse_trace_status' sets default value of each field of
13208 'ts' at first, so we don't have to do it here. */
13209 parse_trace_status (p
, ts
);
13211 return ts
->running
;
13215 remote_target::get_tracepoint_status (struct breakpoint
*bp
,
13216 struct uploaded_tp
*utp
)
13218 struct remote_state
*rs
= get_remote_state ();
13220 struct bp_location
*loc
;
13221 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
13222 size_t size
= get_remote_packet_size ();
13227 tp
->traceframe_usage
= 0;
13228 for (loc
= tp
->loc
; loc
; loc
= loc
->next
)
13230 /* If the tracepoint was never downloaded, don't go asking for
13232 if (tp
->number_on_target
== 0)
13234 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
13235 phex_nz (loc
->address
, 0));
13237 reply
= remote_get_noisy_reply ();
13238 if (reply
&& *reply
)
13241 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13247 utp
->hit_count
= 0;
13248 utp
->traceframe_usage
= 0;
13249 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
13250 phex_nz (utp
->addr
, 0));
13252 reply
= remote_get_noisy_reply ();
13253 if (reply
&& *reply
)
13256 parse_tracepoint_status (reply
+ 1, bp
, utp
);
13262 remote_target::trace_stop ()
13264 struct remote_state
*rs
= get_remote_state ();
13267 remote_get_noisy_reply ();
13268 if (*rs
->buf
== '\0')
13269 error (_("Target does not support this command."));
13270 if (strcmp (rs
->buf
, "OK") != 0)
13271 error (_("Bogus reply from target: %s"), rs
->buf
);
13275 remote_target::trace_find (enum trace_find_type type
, int num
,
13276 CORE_ADDR addr1
, CORE_ADDR addr2
,
13279 struct remote_state
*rs
= get_remote_state ();
13280 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13282 int target_frameno
= -1, target_tracept
= -1;
13284 /* Lookups other than by absolute frame number depend on the current
13285 trace selected, so make sure it is correct on the remote end
13287 if (type
!= tfind_number
)
13288 set_remote_traceframe ();
13291 strcpy (p
, "QTFrame:");
13292 p
= strchr (p
, '\0');
13296 xsnprintf (p
, endbuf
- p
, "%x", num
);
13299 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
13302 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
13305 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
13306 phex_nz (addr2
, 0));
13308 case tfind_outside
:
13309 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
13310 phex_nz (addr2
, 0));
13313 error (_("Unknown trace find type %d"), type
);
13317 reply
= remote_get_noisy_reply ();
13318 if (*reply
== '\0')
13319 error (_("Target does not support this command."));
13321 while (reply
&& *reply
)
13326 target_frameno
= (int) strtol (p
, &reply
, 16);
13328 error (_("Unable to parse trace frame number"));
13329 /* Don't update our remote traceframe number cache on failure
13330 to select a remote traceframe. */
13331 if (target_frameno
== -1)
13336 target_tracept
= (int) strtol (p
, &reply
, 16);
13338 error (_("Unable to parse tracepoint number"));
13340 case 'O': /* "OK"? */
13341 if (reply
[1] == 'K' && reply
[2] == '\0')
13344 error (_("Bogus reply from target: %s"), reply
);
13347 error (_("Bogus reply from target: %s"), reply
);
13350 *tpp
= target_tracept
;
13352 rs
->remote_traceframe_number
= target_frameno
;
13353 return target_frameno
;
13357 remote_target::get_trace_state_variable_value (int tsvnum
, LONGEST
*val
)
13359 struct remote_state
*rs
= get_remote_state ();
13363 set_remote_traceframe ();
13365 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
13367 reply
= remote_get_noisy_reply ();
13368 if (reply
&& *reply
)
13372 unpack_varlen_hex (reply
+ 1, &uval
);
13373 *val
= (LONGEST
) uval
;
13381 remote_target::save_trace_data (const char *filename
)
13383 struct remote_state
*rs
= get_remote_state ();
13387 strcpy (p
, "QTSave:");
13389 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
13390 error (_("Remote file name too long for trace save packet"));
13391 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
13394 reply
= remote_get_noisy_reply ();
13395 if (*reply
== '\0')
13396 error (_("Target does not support this command."));
13397 if (strcmp (reply
, "OK") != 0)
13398 error (_("Bogus reply from target: %s"), reply
);
13402 /* This is basically a memory transfer, but needs to be its own packet
13403 because we don't know how the target actually organizes its trace
13404 memory, plus we want to be able to ask for as much as possible, but
13405 not be unhappy if we don't get as much as we ask for. */
13408 remote_target::get_raw_trace_data (gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
13410 struct remote_state
*rs
= get_remote_state ();
13416 strcpy (p
, "qTBuffer:");
13418 p
+= hexnumstr (p
, offset
);
13420 p
+= hexnumstr (p
, len
);
13424 reply
= remote_get_noisy_reply ();
13425 if (reply
&& *reply
)
13427 /* 'l' by itself means we're at the end of the buffer and
13428 there is nothing more to get. */
13432 /* Convert the reply into binary. Limit the number of bytes to
13433 convert according to our passed-in buffer size, rather than
13434 what was returned in the packet; if the target is
13435 unexpectedly generous and gives us a bigger reply than we
13436 asked for, we don't want to crash. */
13437 rslt
= hex2bin (reply
, buf
, len
);
13441 /* Something went wrong, flag as an error. */
13446 remote_target::set_disconnected_tracing (int val
)
13448 struct remote_state
*rs
= get_remote_state ();
13450 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
13454 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
13456 reply
= remote_get_noisy_reply ();
13457 if (*reply
== '\0')
13458 error (_("Target does not support this command."));
13459 if (strcmp (reply
, "OK") != 0)
13460 error (_("Bogus reply from target: %s"), reply
);
13463 warning (_("Target does not support disconnected tracing."));
13467 remote_target::core_of_thread (ptid_t ptid
)
13469 struct thread_info
*info
= find_thread_ptid (ptid
);
13471 if (info
!= NULL
&& info
->priv
!= NULL
)
13472 return get_remote_thread_info (info
)->core
;
13478 remote_target::set_circular_trace_buffer (int val
)
13480 struct remote_state
*rs
= get_remote_state ();
13483 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
13485 reply
= remote_get_noisy_reply ();
13486 if (*reply
== '\0')
13487 error (_("Target does not support this command."));
13488 if (strcmp (reply
, "OK") != 0)
13489 error (_("Bogus reply from target: %s"), reply
);
13493 remote_target::traceframe_info ()
13495 gdb::optional
<gdb::char_vector
> text
13496 = target_read_stralloc (current_top_target (), TARGET_OBJECT_TRACEFRAME_INFO
,
13499 return parse_traceframe_info (text
->data ());
13504 /* Handle the qTMinFTPILen packet. Returns the minimum length of
13505 instruction on which a fast tracepoint may be placed. Returns -1
13506 if the packet is not supported, and 0 if the minimum instruction
13507 length is unknown. */
13510 remote_target::get_min_fast_tracepoint_insn_len ()
13512 struct remote_state
*rs
= get_remote_state ();
13515 /* If we're not debugging a process yet, the IPA can't be
13517 if (!target_has_execution
)
13520 /* Make sure the remote is pointing at the right process. */
13521 set_general_process ();
13523 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
13525 reply
= remote_get_noisy_reply ();
13526 if (*reply
== '\0')
13530 ULONGEST min_insn_len
;
13532 unpack_varlen_hex (reply
, &min_insn_len
);
13534 return (int) min_insn_len
;
13539 remote_target::set_trace_buffer_size (LONGEST val
)
13541 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
13543 struct remote_state
*rs
= get_remote_state ();
13544 char *buf
= rs
->buf
;
13545 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13546 enum packet_result result
;
13548 gdb_assert (val
>= 0 || val
== -1);
13549 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
13550 /* Send -1 as literal "-1" to avoid host size dependency. */
13554 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
13557 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
13560 remote_get_noisy_reply ();
13561 result
= packet_ok (rs
->buf
,
13562 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
13564 if (result
!= PACKET_OK
)
13565 warning (_("Bogus reply from target: %s"), rs
->buf
);
13570 remote_target::set_trace_notes (const char *user
, const char *notes
,
13571 const char *stop_notes
)
13573 struct remote_state
*rs
= get_remote_state ();
13575 char *buf
= rs
->buf
;
13576 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13579 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13582 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13583 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13589 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13590 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13596 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13597 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13601 /* Ensure the buffer is terminated. */
13605 reply
= remote_get_noisy_reply ();
13606 if (*reply
== '\0')
13609 if (strcmp (reply
, "OK") != 0)
13610 error (_("Bogus reply from target: %s"), reply
);
13616 remote_target::use_agent (bool use
)
13618 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13620 struct remote_state
*rs
= get_remote_state ();
13622 /* If the stub supports QAgent. */
13623 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13625 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13627 if (strcmp (rs
->buf
, "OK") == 0)
13638 remote_target::can_use_agent ()
13640 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13643 struct btrace_target_info
13645 /* The ptid of the traced thread. */
13648 /* The obtained branch trace configuration. */
13649 struct btrace_config conf
;
13652 /* Reset our idea of our target's btrace configuration. */
13655 remote_btrace_reset (remote_state
*rs
)
13657 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13660 /* Synchronize the configuration with the target. */
13663 remote_target::btrace_sync_conf (const btrace_config
*conf
)
13665 struct packet_config
*packet
;
13666 struct remote_state
*rs
;
13667 char *buf
, *pos
, *endbuf
;
13669 rs
= get_remote_state ();
13671 endbuf
= buf
+ get_remote_packet_size ();
13673 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13674 if (packet_config_support (packet
) == PACKET_ENABLE
13675 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13678 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13682 getpkt (&buf
, &rs
->buf_size
, 0);
13684 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13686 if (buf
[0] == 'E' && buf
[1] == '.')
13687 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13689 error (_("Failed to configure the BTS buffer size."));
13692 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13695 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13696 if (packet_config_support (packet
) == PACKET_ENABLE
13697 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13700 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13704 getpkt (&buf
, &rs
->buf_size
, 0);
13706 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13708 if (buf
[0] == 'E' && buf
[1] == '.')
13709 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13711 error (_("Failed to configure the trace buffer size."));
13714 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13718 /* Read the current thread's btrace configuration from the target and
13719 store it into CONF. */
13722 btrace_read_config (struct btrace_config
*conf
)
13724 gdb::optional
<gdb::char_vector
> xml
13725 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE_CONF
, "");
13727 parse_xml_btrace_conf (conf
, xml
->data ());
13730 /* Maybe reopen target btrace. */
13733 remote_target::remote_btrace_maybe_reopen ()
13735 struct remote_state
*rs
= get_remote_state ();
13736 int btrace_target_pushed
= 0;
13737 #if !defined (HAVE_LIBIPT)
13741 scoped_restore_current_thread restore_thread
;
13743 for (thread_info
*tp
: all_non_exited_threads ())
13745 set_general_thread (tp
->ptid
);
13747 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13748 btrace_read_config (&rs
->btrace_config
);
13750 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13753 #if !defined (HAVE_LIBIPT)
13754 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13759 warning (_("Target is recording using Intel Processor Trace "
13760 "but support was disabled at compile time."));
13765 #endif /* !defined (HAVE_LIBIPT) */
13767 /* Push target, once, but before anything else happens. This way our
13768 changes to the threads will be cleaned up by unpushing the target
13769 in case btrace_read_config () throws. */
13770 if (!btrace_target_pushed
)
13772 btrace_target_pushed
= 1;
13773 record_btrace_push_target ();
13774 printf_filtered (_("Target is recording using %s.\n"),
13775 btrace_format_string (rs
->btrace_config
.format
));
13778 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13779 tp
->btrace
.target
->ptid
= tp
->ptid
;
13780 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13784 /* Enable branch tracing. */
13786 struct btrace_target_info
*
13787 remote_target::enable_btrace (ptid_t ptid
, const struct btrace_config
*conf
)
13789 struct btrace_target_info
*tinfo
= NULL
;
13790 struct packet_config
*packet
= NULL
;
13791 struct remote_state
*rs
= get_remote_state ();
13792 char *buf
= rs
->buf
;
13793 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13795 switch (conf
->format
)
13797 case BTRACE_FORMAT_BTS
:
13798 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13801 case BTRACE_FORMAT_PT
:
13802 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13806 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13807 error (_("Target does not support branch tracing."));
13809 btrace_sync_conf (conf
);
13811 set_general_thread (ptid
);
13813 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13815 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13817 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13819 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13820 error (_("Could not enable branch tracing for %s: %s"),
13821 target_pid_to_str (ptid
), rs
->buf
+ 2);
13823 error (_("Could not enable branch tracing for %s."),
13824 target_pid_to_str (ptid
));
13827 tinfo
= XCNEW (struct btrace_target_info
);
13828 tinfo
->ptid
= ptid
;
13830 /* If we fail to read the configuration, we lose some information, but the
13831 tracing itself is not impacted. */
13834 btrace_read_config (&tinfo
->conf
);
13836 CATCH (err
, RETURN_MASK_ERROR
)
13838 if (err
.message
!= NULL
)
13839 warning ("%s", err
.message
);
13846 /* Disable branch tracing. */
13849 remote_target::disable_btrace (struct btrace_target_info
*tinfo
)
13851 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13852 struct remote_state
*rs
= get_remote_state ();
13853 char *buf
= rs
->buf
;
13854 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13856 if (packet_config_support (packet
) != PACKET_ENABLE
)
13857 error (_("Target does not support branch tracing."));
13859 set_general_thread (tinfo
->ptid
);
13861 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13863 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13865 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13867 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13868 error (_("Could not disable branch tracing for %s: %s"),
13869 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13871 error (_("Could not disable branch tracing for %s."),
13872 target_pid_to_str (tinfo
->ptid
));
13878 /* Teardown branch tracing. */
13881 remote_target::teardown_btrace (struct btrace_target_info
*tinfo
)
13883 /* We must not talk to the target during teardown. */
13887 /* Read the branch trace. */
13890 remote_target::read_btrace (struct btrace_data
*btrace
,
13891 struct btrace_target_info
*tinfo
,
13892 enum btrace_read_type type
)
13894 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13897 if (packet_config_support (packet
) != PACKET_ENABLE
)
13898 error (_("Target does not support branch tracing."));
13900 #if !defined(HAVE_LIBEXPAT)
13901 error (_("Cannot process branch tracing result. XML parsing not supported."));
13906 case BTRACE_READ_ALL
:
13909 case BTRACE_READ_NEW
:
13912 case BTRACE_READ_DELTA
:
13916 internal_error (__FILE__
, __LINE__
,
13917 _("Bad branch tracing read type: %u."),
13918 (unsigned int) type
);
13921 gdb::optional
<gdb::char_vector
> xml
13922 = target_read_stralloc (current_top_target (), TARGET_OBJECT_BTRACE
, annex
);
13924 return BTRACE_ERR_UNKNOWN
;
13926 parse_xml_btrace (btrace
, xml
->data ());
13928 return BTRACE_ERR_NONE
;
13931 const struct btrace_config
*
13932 remote_target::btrace_conf (const struct btrace_target_info
*tinfo
)
13934 return &tinfo
->conf
;
13938 remote_target::augmented_libraries_svr4_read ()
13940 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13944 /* Implementation of to_load. */
13947 remote_target::load (const char *name
, int from_tty
)
13949 generic_load (name
, from_tty
);
13952 /* Accepts an integer PID; returns a string representing a file that
13953 can be opened on the remote side to get the symbols for the child
13954 process. Returns NULL if the operation is not supported. */
13957 remote_target::pid_to_exec_file (int pid
)
13959 static gdb::optional
<gdb::char_vector
> filename
;
13960 struct inferior
*inf
;
13961 char *annex
= NULL
;
13963 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13966 inf
= find_inferior_pid (pid
);
13968 internal_error (__FILE__
, __LINE__
,
13969 _("not currently attached to process %d"), pid
);
13971 if (!inf
->fake_pid_p
)
13973 const int annex_size
= 9;
13975 annex
= (char *) alloca (annex_size
);
13976 xsnprintf (annex
, annex_size
, "%x", pid
);
13979 filename
= target_read_stralloc (current_top_target (),
13980 TARGET_OBJECT_EXEC_FILE
, annex
);
13982 return filename
? filename
->data () : nullptr;
13985 /* Implement the to_can_do_single_step target_ops method. */
13988 remote_target::can_do_single_step ()
13990 /* We can only tell whether target supports single step or not by
13991 supported s and S vCont actions if the stub supports vContSupported
13992 feature. If the stub doesn't support vContSupported feature,
13993 we have conservatively to think target doesn't supports single
13995 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13997 struct remote_state
*rs
= get_remote_state ();
13999 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14000 remote_vcont_probe ();
14002 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
14008 /* Implementation of the to_execution_direction method for the remote
14011 enum exec_direction_kind
14012 remote_target::execution_direction ()
14014 struct remote_state
*rs
= get_remote_state ();
14016 return rs
->last_resume_exec_dir
;
14019 /* Return pointer to the thread_info struct which corresponds to
14020 THREAD_HANDLE (having length HANDLE_LEN). */
14023 remote_target::thread_handle_to_thread_info (const gdb_byte
*thread_handle
,
14027 for (thread_info
*tp
: all_non_exited_threads ())
14029 remote_thread_info
*priv
= get_remote_thread_info (tp
);
14031 if (tp
->inf
== inf
&& priv
!= NULL
)
14033 if (handle_len
!= priv
->thread_handle
.size ())
14034 error (_("Thread handle size mismatch: %d vs %zu (from remote)"),
14035 handle_len
, priv
->thread_handle
.size ());
14036 if (memcmp (thread_handle
, priv
->thread_handle
.data (),
14046 remote_target::can_async_p ()
14048 struct remote_state
*rs
= get_remote_state ();
14050 /* We don't go async if the user has explicitly prevented it with the
14051 "maint set target-async" command. */
14052 if (!target_async_permitted
)
14055 /* We're async whenever the serial device is. */
14056 return serial_can_async_p (rs
->remote_desc
);
14060 remote_target::is_async_p ()
14062 struct remote_state
*rs
= get_remote_state ();
14064 if (!target_async_permitted
)
14065 /* We only enable async when the user specifically asks for it. */
14068 /* We're async whenever the serial device is. */
14069 return serial_is_async_p (rs
->remote_desc
);
14072 /* Pass the SERIAL event on and up to the client. One day this code
14073 will be able to delay notifying the client of an event until the
14074 point where an entire packet has been received. */
14076 static serial_event_ftype remote_async_serial_handler
;
14079 remote_async_serial_handler (struct serial
*scb
, void *context
)
14081 /* Don't propogate error information up to the client. Instead let
14082 the client find out about the error by querying the target. */
14083 inferior_event_handler (INF_REG_EVENT
, NULL
);
14087 remote_async_inferior_event_handler (gdb_client_data data
)
14089 inferior_event_handler (INF_REG_EVENT
, data
);
14093 remote_target::async (int enable
)
14095 struct remote_state
*rs
= get_remote_state ();
14099 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
14101 /* If there are pending events in the stop reply queue tell the
14102 event loop to process them. */
14103 if (!rs
->stop_reply_queue
.empty ())
14104 mark_async_event_handler (rs
->remote_async_inferior_event_token
);
14105 /* For simplicity, below we clear the pending events token
14106 without remembering whether it is marked, so here we always
14107 mark it. If there's actually no pending notification to
14108 process, this ends up being a no-op (other than a spurious
14109 event-loop wakeup). */
14110 if (target_is_non_stop_p ())
14111 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14115 serial_async (rs
->remote_desc
, NULL
, NULL
);
14116 /* If the core is disabling async, it doesn't want to be
14117 disturbed with target events. Clear all async event sources
14119 clear_async_event_handler (rs
->remote_async_inferior_event_token
);
14120 if (target_is_non_stop_p ())
14121 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
14125 /* Implementation of the to_thread_events method. */
14128 remote_target::thread_events (int enable
)
14130 struct remote_state
*rs
= get_remote_state ();
14131 size_t size
= get_remote_packet_size ();
14133 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
14136 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
14138 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
14140 switch (packet_ok (rs
->buf
,
14141 &remote_protocol_packets
[PACKET_QThreadEvents
]))
14144 if (strcmp (rs
->buf
, "OK") != 0)
14145 error (_("Remote refused setting thread events: %s"), rs
->buf
);
14148 warning (_("Remote failure reply: %s"), rs
->buf
);
14150 case PACKET_UNKNOWN
:
14156 set_remote_cmd (const char *args
, int from_tty
)
14158 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
14162 show_remote_cmd (const char *args
, int from_tty
)
14164 /* We can't just use cmd_show_list here, because we want to skip
14165 the redundant "show remote Z-packet" and the legacy aliases. */
14166 struct cmd_list_element
*list
= remote_show_cmdlist
;
14167 struct ui_out
*uiout
= current_uiout
;
14169 ui_out_emit_tuple
tuple_emitter (uiout
, "showlist");
14170 for (; list
!= NULL
; list
= list
->next
)
14171 if (strcmp (list
->name
, "Z-packet") == 0)
14173 else if (list
->type
== not_set_cmd
)
14174 /* Alias commands are exactly like the original, except they
14175 don't have the normal type. */
14179 ui_out_emit_tuple
option_emitter (uiout
, "option");
14181 uiout
->field_string ("name", list
->name
);
14182 uiout
->text (": ");
14183 if (list
->type
== show_cmd
)
14184 do_show_command (NULL
, from_tty
, list
);
14186 cmd_func (list
, NULL
, from_tty
);
14191 /* Function to be called whenever a new objfile (shlib) is detected. */
14193 remote_new_objfile (struct objfile
*objfile
)
14195 remote_target
*remote
= get_current_remote_target ();
14197 if (remote
!= NULL
) /* Have a remote connection. */
14198 remote
->remote_check_symbols ();
14201 /* Pull all the tracepoints defined on the target and create local
14202 data structures representing them. We don't want to create real
14203 tracepoints yet, we don't want to mess up the user's existing
14207 remote_target::upload_tracepoints (struct uploaded_tp
**utpp
)
14209 struct remote_state
*rs
= get_remote_state ();
14212 /* Ask for a first packet of tracepoint definition. */
14214 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
14216 while (*p
&& *p
!= 'l')
14218 parse_tracepoint_definition (p
, utpp
);
14219 /* Ask for another packet of tracepoint definition. */
14221 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
14228 remote_target::upload_trace_state_variables (struct uploaded_tsv
**utsvp
)
14230 struct remote_state
*rs
= get_remote_state ();
14233 /* Ask for a first packet of variable definition. */
14235 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
14237 while (*p
&& *p
!= 'l')
14239 parse_tsv_definition (p
, utsvp
);
14240 /* Ask for another packet of variable definition. */
14242 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
14248 /* The "set/show range-stepping" show hook. */
14251 show_range_stepping (struct ui_file
*file
, int from_tty
,
14252 struct cmd_list_element
*c
,
14255 fprintf_filtered (file
,
14256 _("Debugger's willingness to use range stepping "
14257 "is %s.\n"), value
);
14260 /* Return true if the vCont;r action is supported by the remote
14264 remote_target::vcont_r_supported ()
14266 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
14267 remote_vcont_probe ();
14269 return (packet_support (PACKET_vCont
) == PACKET_ENABLE
14270 && get_remote_state ()->supports_vCont
.r
);
14273 /* The "set/show range-stepping" set hook. */
14276 set_range_stepping (const char *ignore_args
, int from_tty
,
14277 struct cmd_list_element
*c
)
14279 /* When enabling, check whether range stepping is actually supported
14280 by the target, and warn if not. */
14281 if (use_range_stepping
)
14283 remote_target
*remote
= get_current_remote_target ();
14285 || !remote
->vcont_r_supported ())
14286 warning (_("Range stepping is not supported by the current target"));
14291 _initialize_remote (void)
14293 struct cmd_list_element
*cmd
;
14294 const char *cmd_name
;
14296 /* architecture specific data */
14297 remote_g_packet_data_handle
=
14298 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
14301 = register_program_space_data_with_cleanup (NULL
,
14302 remote_pspace_data_cleanup
);
14304 add_target (remote_target_info
, remote_target::open
);
14305 add_target (extended_remote_target_info
, extended_remote_target::open
);
14307 /* Hook into new objfile notification. */
14308 gdb::observers::new_objfile
.attach (remote_new_objfile
);
14311 init_remote_threadtests ();
14314 /* set/show remote ... */
14316 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
14317 Remote protocol specific variables\n\
14318 Configure various remote-protocol specific variables such as\n\
14319 the packets being used"),
14320 &remote_set_cmdlist
, "set remote ",
14321 0 /* allow-unknown */, &setlist
);
14322 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
14323 Remote protocol specific variables\n\
14324 Configure various remote-protocol specific variables such as\n\
14325 the packets being used"),
14326 &remote_show_cmdlist
, "show remote ",
14327 0 /* allow-unknown */, &showlist
);
14329 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
14330 Compare section data on target to the exec file.\n\
14331 Argument is a single section name (default: all loaded sections).\n\
14332 To compare only read-only loaded sections, specify the -r option."),
14335 add_cmd ("packet", class_maintenance
, packet_command
, _("\
14336 Send an arbitrary packet to a remote target.\n\
14337 maintenance packet TEXT\n\
14338 If GDB is talking to an inferior via the GDB serial protocol, then\n\
14339 this command sends the string TEXT to the inferior, and displays the\n\
14340 response packet. GDB supplies the initial `$' character, and the\n\
14341 terminating `#' character and checksum."),
14344 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
14345 Set whether to send break if interrupted."), _("\
14346 Show whether to send break if interrupted."), _("\
14347 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14348 set_remotebreak
, show_remotebreak
,
14349 &setlist
, &showlist
);
14350 cmd_name
= "remotebreak";
14351 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
14352 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14353 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14354 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
14355 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14357 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14358 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14360 Set interrupt sequence to remote target."), _("\
14361 Show interrupt sequence to remote target."), _("\
14362 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14363 NULL
, show_interrupt_sequence
,
14364 &remote_set_cmdlist
,
14365 &remote_show_cmdlist
);
14367 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14368 &interrupt_on_connect
, _("\
14369 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14370 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14371 If set, interrupt sequence is sent to remote target."),
14373 &remote_set_cmdlist
, &remote_show_cmdlist
);
14375 /* Install commands for configuring memory read/write packets. */
14377 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14378 Set the maximum number of bytes per memory write packet (deprecated)."),
14380 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14381 Show the maximum number of bytes per memory write packet (deprecated)."),
14383 add_cmd ("memory-write-packet-size", no_class
,
14384 set_memory_write_packet_size
, _("\
14385 Set the maximum number of bytes per memory-write packet.\n\
14386 Specify the number of bytes in a packet or 0 (zero) for the\n\
14387 default packet size. The actual limit is further reduced\n\
14388 dependent on the target. Specify ``fixed'' to disable the\n\
14389 further restriction and ``limit'' to enable that restriction."),
14390 &remote_set_cmdlist
);
14391 add_cmd ("memory-read-packet-size", no_class
,
14392 set_memory_read_packet_size
, _("\
14393 Set the maximum number of bytes per memory-read packet.\n\
14394 Specify the number of bytes in a packet or 0 (zero) for the\n\
14395 default packet size. The actual limit is further reduced\n\
14396 dependent on the target. Specify ``fixed'' to disable the\n\
14397 further restriction and ``limit'' to enable that restriction."),
14398 &remote_set_cmdlist
);
14399 add_cmd ("memory-write-packet-size", no_class
,
14400 show_memory_write_packet_size
,
14401 _("Show the maximum number of bytes per memory-write packet."),
14402 &remote_show_cmdlist
);
14403 add_cmd ("memory-read-packet-size", no_class
,
14404 show_memory_read_packet_size
,
14405 _("Show the maximum number of bytes per memory-read packet."),
14406 &remote_show_cmdlist
);
14408 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-limit", no_class
,
14409 &remote_hw_watchpoint_limit
, _("\
14410 Set the maximum number of target hardware watchpoints."), _("\
14411 Show the maximum number of target hardware watchpoints."), _("\
14412 Specify \"unlimited\" for unlimited hardware watchpoints."),
14413 NULL
, show_hardware_watchpoint_limit
,
14414 &remote_set_cmdlist
,
14415 &remote_show_cmdlist
);
14416 add_setshow_zuinteger_unlimited_cmd ("hardware-watchpoint-length-limit",
14418 &remote_hw_watchpoint_length_limit
, _("\
14419 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14420 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14421 Specify \"unlimited\" to allow watchpoints of unlimited size."),
14422 NULL
, show_hardware_watchpoint_length_limit
,
14423 &remote_set_cmdlist
, &remote_show_cmdlist
);
14424 add_setshow_zuinteger_unlimited_cmd ("hardware-breakpoint-limit", no_class
,
14425 &remote_hw_breakpoint_limit
, _("\
14426 Set the maximum number of target hardware breakpoints."), _("\
14427 Show the maximum number of target hardware breakpoints."), _("\
14428 Specify \"unlimited\" for unlimited hardware breakpoints."),
14429 NULL
, show_hardware_breakpoint_limit
,
14430 &remote_set_cmdlist
, &remote_show_cmdlist
);
14432 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14433 &remote_address_size
, _("\
14434 Set the maximum size of the address (in bits) in a memory packet."), _("\
14435 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14437 NULL
, /* FIXME: i18n: */
14438 &setlist
, &showlist
);
14440 init_all_packet_configs ();
14442 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14443 "X", "binary-download", 1);
14445 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14446 "vCont", "verbose-resume", 0);
14448 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14449 "QPassSignals", "pass-signals", 0);
14451 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14452 "QCatchSyscalls", "catch-syscalls", 0);
14454 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14455 "QProgramSignals", "program-signals", 0);
14457 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QSetWorkingDir
],
14458 "QSetWorkingDir", "set-working-dir", 0);
14460 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartupWithShell
],
14461 "QStartupWithShell", "startup-with-shell", 0);
14463 add_packet_config_cmd (&remote_protocol_packets
14464 [PACKET_QEnvironmentHexEncoded
],
14465 "QEnvironmentHexEncoded", "environment-hex-encoded",
14468 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentReset
],
14469 "QEnvironmentReset", "environment-reset",
14472 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QEnvironmentUnset
],
14473 "QEnvironmentUnset", "environment-unset",
14476 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14477 "qSymbol", "symbol-lookup", 0);
14479 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14480 "P", "set-register", 1);
14482 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14483 "p", "fetch-register", 1);
14485 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14486 "Z0", "software-breakpoint", 0);
14488 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14489 "Z1", "hardware-breakpoint", 0);
14491 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14492 "Z2", "write-watchpoint", 0);
14494 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14495 "Z3", "read-watchpoint", 0);
14497 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14498 "Z4", "access-watchpoint", 0);
14500 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14501 "qXfer:auxv:read", "read-aux-vector", 0);
14503 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14504 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14506 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14507 "qXfer:features:read", "target-features", 0);
14509 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14510 "qXfer:libraries:read", "library-info", 0);
14512 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14513 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14515 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14516 "qXfer:memory-map:read", "memory-map", 0);
14518 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14519 "qXfer:spu:read", "read-spu-object", 0);
14521 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14522 "qXfer:spu:write", "write-spu-object", 0);
14524 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14525 "qXfer:osdata:read", "osdata", 0);
14527 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14528 "qXfer:threads:read", "threads", 0);
14530 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14531 "qXfer:siginfo:read", "read-siginfo-object", 0);
14533 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14534 "qXfer:siginfo:write", "write-siginfo-object", 0);
14536 add_packet_config_cmd
14537 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14538 "qXfer:traceframe-info:read", "traceframe-info", 0);
14540 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14541 "qXfer:uib:read", "unwind-info-block", 0);
14543 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14544 "qGetTLSAddr", "get-thread-local-storage-address",
14547 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14548 "qGetTIBAddr", "get-thread-information-block-address",
14551 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14552 "bc", "reverse-continue", 0);
14554 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14555 "bs", "reverse-step", 0);
14557 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14558 "qSupported", "supported-packets", 0);
14560 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14561 "qSearch:memory", "search-memory", 0);
14563 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14564 "qTStatus", "trace-status", 0);
14566 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14567 "vFile:setfs", "hostio-setfs", 0);
14569 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14570 "vFile:open", "hostio-open", 0);
14572 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14573 "vFile:pread", "hostio-pread", 0);
14575 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14576 "vFile:pwrite", "hostio-pwrite", 0);
14578 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14579 "vFile:close", "hostio-close", 0);
14581 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14582 "vFile:unlink", "hostio-unlink", 0);
14584 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14585 "vFile:readlink", "hostio-readlink", 0);
14587 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14588 "vFile:fstat", "hostio-fstat", 0);
14590 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14591 "vAttach", "attach", 0);
14593 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14596 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14597 "QStartNoAckMode", "noack", 0);
14599 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14600 "vKill", "kill", 0);
14602 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14603 "qAttached", "query-attached", 0);
14605 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14606 "ConditionalTracepoints",
14607 "conditional-tracepoints", 0);
14609 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14610 "ConditionalBreakpoints",
14611 "conditional-breakpoints", 0);
14613 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14614 "BreakpointCommands",
14615 "breakpoint-commands", 0);
14617 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14618 "FastTracepoints", "fast-tracepoints", 0);
14620 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14621 "TracepointSource", "TracepointSource", 0);
14623 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14624 "QAllow", "allow", 0);
14626 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14627 "StaticTracepoints", "static-tracepoints", 0);
14629 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14630 "InstallInTrace", "install-in-trace", 0);
14632 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14633 "qXfer:statictrace:read", "read-sdata-object", 0);
14635 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14636 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14638 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14639 "QDisableRandomization", "disable-randomization", 0);
14641 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14642 "QAgent", "agent", 0);
14644 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14645 "QTBuffer:size", "trace-buffer-size", 0);
14647 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14648 "Qbtrace:off", "disable-btrace", 0);
14650 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14651 "Qbtrace:bts", "enable-btrace-bts", 0);
14653 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14654 "Qbtrace:pt", "enable-btrace-pt", 0);
14656 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14657 "qXfer:btrace", "read-btrace", 0);
14659 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14660 "qXfer:btrace-conf", "read-btrace-conf", 0);
14662 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14663 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14665 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14666 "multiprocess-feature", "multiprocess-feature", 0);
14668 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14669 "swbreak-feature", "swbreak-feature", 0);
14671 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14672 "hwbreak-feature", "hwbreak-feature", 0);
14674 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14675 "fork-event-feature", "fork-event-feature", 0);
14677 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14678 "vfork-event-feature", "vfork-event-feature", 0);
14680 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14681 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14683 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14684 "vContSupported", "verbose-resume-supported", 0);
14686 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14687 "exec-event-feature", "exec-event-feature", 0);
14689 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14690 "vCtrlC", "ctrl-c", 0);
14692 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14693 "QThreadEvents", "thread-events", 0);
14695 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14696 "N stop reply", "no-resumed-stop-reply", 0);
14698 /* Assert that we've registered "set remote foo-packet" commands
14699 for all packet configs. */
14703 for (i
= 0; i
< PACKET_MAX
; i
++)
14705 /* Ideally all configs would have a command associated. Some
14706 still don't though. */
14711 case PACKET_QNonStop
:
14712 case PACKET_EnableDisableTracepoints_feature
:
14713 case PACKET_tracenz_feature
:
14714 case PACKET_DisconnectedTracing_feature
:
14715 case PACKET_augmented_libraries_svr4_read_feature
:
14717 /* Additions to this list need to be well justified:
14718 pre-existing packets are OK; new packets are not. */
14726 /* This catches both forgetting to add a config command, and
14727 forgetting to remove a packet from the exception list. */
14728 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14732 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14733 Z sub-packet has its own set and show commands, but users may
14734 have sets to this variable in their .gdbinit files (or in their
14736 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14737 &remote_Z_packet_detect
, _("\
14738 Set use of remote protocol `Z' packets"), _("\
14739 Show use of remote protocol `Z' packets "), _("\
14740 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14742 set_remote_protocol_Z_packet_cmd
,
14743 show_remote_protocol_Z_packet_cmd
,
14744 /* FIXME: i18n: Use of remote protocol
14745 `Z' packets is %s. */
14746 &remote_set_cmdlist
, &remote_show_cmdlist
);
14748 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14749 Manipulate files on the remote system\n\
14750 Transfer files to and from the remote target system."),
14751 &remote_cmdlist
, "remote ",
14752 0 /* allow-unknown */, &cmdlist
);
14754 add_cmd ("put", class_files
, remote_put_command
,
14755 _("Copy a local file to the remote system."),
14758 add_cmd ("get", class_files
, remote_get_command
,
14759 _("Copy a remote file to the local system."),
14762 add_cmd ("delete", class_files
, remote_delete_command
,
14763 _("Delete a remote file."),
14766 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14767 &remote_exec_file_var
, _("\
14768 Set the remote pathname for \"run\""), _("\
14769 Show the remote pathname for \"run\""), NULL
,
14770 set_remote_exec_file
,
14771 show_remote_exec_file
,
14772 &remote_set_cmdlist
,
14773 &remote_show_cmdlist
);
14775 add_setshow_boolean_cmd ("range-stepping", class_run
,
14776 &use_range_stepping
, _("\
14777 Enable or disable range stepping."), _("\
14778 Show whether target-assisted range stepping is enabled."), _("\
14779 If on, and the target supports it, when stepping a source line, GDB\n\
14780 tells the target to step the corresponding range of addresses itself instead\n\
14781 of issuing multiple single-steps. This speeds up source level\n\
14782 stepping. If off, GDB always issues single-steps, even if range\n\
14783 stepping is supported by the target. The default is on."),
14784 set_range_stepping
,
14785 show_range_stepping
,
14789 /* Eventually initialize fileio. See fileio.c */
14790 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14792 /* Take advantage of the fact that the TID field is not used, to tag
14793 special ptids with it set to != 0. */
14794 magic_null_ptid
= ptid_t (42000, -1, 1);
14795 not_sent_ptid
= ptid_t (42000, -2, 1);
14796 any_thread_ptid
= ptid_t (42000, 0, 1);