1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2017 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 "terminal.h" */
33 #include "gdb-stabs.h"
34 #include "gdbthread.h"
36 #include "remote-notif.h"
41 #include "cli/cli-decode.h"
42 #include "cli/cli-setshow.h"
43 #include "target-descriptions.h"
45 #include "filestuff.h"
50 #include "gdb_sys_time.h"
52 #include "event-loop.h"
53 #include "event-top.h"
59 #include "gdbcore.h" /* for exec_bfd */
61 #include "remote-fileio.h"
62 #include "gdb/fileio.h"
64 #include "xml-support.h"
66 #include "memory-map.h"
68 #include "tracepoint.h"
73 #include "record-btrace.h"
76 /* Temp hacks for tracepoint encoding migration. */
77 static char *target_buf
;
78 static long target_buf_size
;
80 /* Per-program-space data key. */
81 static const struct program_space_data
*remote_pspace_data
;
83 /* The variable registered as the control variable used by the
84 remote exec-file commands. While the remote exec-file setting is
85 per-program-space, the set/show machinery uses this as the
86 location of the remote exec-file value. */
87 static char *remote_exec_file_var
;
89 /* The size to align memory write packets, when practical. The protocol
90 does not guarantee any alignment, and gdb will generate short
91 writes and unaligned writes, but even as a best-effort attempt this
92 can improve bulk transfers. For instance, if a write is misaligned
93 relative to the target's data bus, the stub may need to make an extra
94 round trip fetching data from the target. This doesn't make a
95 huge difference, but it's easy to do, so we try to be helpful.
97 The alignment chosen is arbitrary; usually data bus width is
98 important here, not the possibly larger cache line size. */
99 enum { REMOTE_ALIGN_WRITES
= 16 };
101 /* Prototypes for local functions. */
102 static int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
103 static int getpkt_or_notif_sane (char **buf
, long *sizeof_buf
,
104 int forever
, int *is_notif
);
106 static void remote_files_info (struct target_ops
*ignore
);
108 static void remote_prepare_to_store (struct target_ops
*self
,
109 struct regcache
*regcache
);
111 static void remote_open_1 (const char *, int, struct target_ops
*,
114 static void remote_close (struct target_ops
*self
);
118 static int remote_vkill (int pid
, struct remote_state
*rs
);
120 static void remote_kill_k (void);
122 static void remote_mourn (struct target_ops
*ops
);
124 static void extended_remote_restart (void);
126 static void remote_send (char **buf
, long *sizeof_buf_p
);
128 static int readchar (int timeout
);
130 static void remote_serial_write (const char *str
, int len
);
132 static void remote_kill (struct target_ops
*ops
);
134 static int remote_can_async_p (struct target_ops
*);
136 static int remote_is_async_p (struct target_ops
*);
138 static void remote_async (struct target_ops
*ops
, int enable
);
140 static void remote_thread_events (struct target_ops
*ops
, int enable
);
142 static void interrupt_query (void);
144 static void set_general_thread (struct ptid ptid
);
145 static void set_continue_thread (struct ptid ptid
);
147 static void get_offsets (void);
149 static void skip_frame (void);
151 static long read_frame (char **buf_p
, long *sizeof_buf
);
153 static int hexnumlen (ULONGEST num
);
155 static void init_remote_ops (void);
157 static void init_extended_remote_ops (void);
159 static void remote_stop (struct target_ops
*self
, ptid_t
);
161 static int stubhex (int ch
);
163 static int hexnumstr (char *, ULONGEST
);
165 static int hexnumnstr (char *, ULONGEST
, int);
167 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
169 static void print_packet (const char *);
171 static void compare_sections_command (char *, int);
173 static void packet_command (char *, int);
175 static int stub_unpack_int (char *buff
, int fieldlength
);
177 static ptid_t
remote_current_thread (ptid_t oldptid
);
179 static int putpkt_binary (const char *buf
, int cnt
);
181 static void check_binary_download (CORE_ADDR addr
);
183 struct packet_config
;
185 static void show_packet_config_cmd (struct packet_config
*config
);
187 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
189 struct cmd_list_element
*c
,
192 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
193 static ptid_t
read_ptid (char *buf
, char **obuf
);
195 static void remote_set_permissions (struct target_ops
*self
);
197 static int remote_get_trace_status (struct target_ops
*self
,
198 struct trace_status
*ts
);
200 static int remote_upload_tracepoints (struct target_ops
*self
,
201 struct uploaded_tp
**utpp
);
203 static int remote_upload_trace_state_variables (struct target_ops
*self
,
204 struct uploaded_tsv
**utsvp
);
206 static void remote_query_supported (void);
208 static void remote_check_symbols (void);
210 void _initialize_remote (void);
213 static void stop_reply_xfree (struct stop_reply
*);
214 static void remote_parse_stop_reply (char *, struct stop_reply
*);
215 static void push_stop_reply (struct stop_reply
*);
216 static void discard_pending_stop_replies_in_queue (struct remote_state
*);
217 static int peek_stop_reply (ptid_t ptid
);
219 struct threads_listing_context
;
220 static void remove_new_fork_children (struct threads_listing_context
*);
222 static void remote_async_inferior_event_handler (gdb_client_data
);
224 static void remote_terminal_ours (struct target_ops
*self
);
226 static int remote_read_description_p (struct target_ops
*target
);
228 static void remote_console_output (char *msg
);
230 static int remote_supports_cond_breakpoints (struct target_ops
*self
);
232 static int remote_can_run_breakpoint_commands (struct target_ops
*self
);
234 static void remote_btrace_reset (void);
236 static void remote_btrace_maybe_reopen (void);
238 static int stop_reply_queue_length (void);
240 static void readahead_cache_invalidate (void);
242 static void remote_unpush_and_throw (void);
246 static struct cmd_list_element
*remote_cmdlist
;
248 /* For "set remote" and "show remote". */
250 static struct cmd_list_element
*remote_set_cmdlist
;
251 static struct cmd_list_element
*remote_show_cmdlist
;
253 /* Stub vCont actions support.
255 Each field is a boolean flag indicating whether the stub reports
256 support for the corresponding action. */
258 struct vCont_action_support
273 /* Controls whether GDB is willing to use range stepping. */
275 static int use_range_stepping
= 1;
277 #define OPAQUETHREADBYTES 8
279 /* a 64 bit opaque identifier */
280 typedef unsigned char threadref
[OPAQUETHREADBYTES
];
282 /* About this many threadisds fit in a packet. */
284 #define MAXTHREADLISTRESULTS 32
286 /* The max number of chars in debug output. The rest of chars are
289 #define REMOTE_DEBUG_MAX_CHAR 512
291 /* Data for the vFile:pread readahead cache. */
293 struct readahead_cache
295 /* The file descriptor for the file that is being cached. -1 if the
299 /* The offset into the file that the cache buffer corresponds
303 /* The buffer holding the cache contents. */
305 /* The buffer's size. We try to read as much as fits into a packet
309 /* Cache hit and miss counters. */
314 /* Description of the remote protocol state for the currently
315 connected target. This is per-target state, and independent of the
316 selected architecture. */
320 /* A buffer to use for incoming packets, and its current size. The
321 buffer is grown dynamically for larger incoming packets.
322 Outgoing packets may also be constructed in this buffer.
323 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
324 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
329 /* True if we're going through initial connection setup (finding out
330 about the remote side's threads, relocating symbols, etc.). */
333 /* If we negotiated packet size explicitly (and thus can bypass
334 heuristics for the largest packet size that will not overflow
335 a buffer in the stub), this will be set to that packet size.
336 Otherwise zero, meaning to use the guessed size. */
337 long explicit_packet_size
;
339 /* remote_wait is normally called when the target is running and
340 waits for a stop reply packet. But sometimes we need to call it
341 when the target is already stopped. We can send a "?" packet
342 and have remote_wait read the response. Or, if we already have
343 the response, we can stash it in BUF and tell remote_wait to
344 skip calling getpkt. This flag is set when BUF contains a
345 stop reply packet and the target is not waiting. */
346 int cached_wait_status
;
348 /* True, if in no ack mode. That is, neither GDB nor the stub will
349 expect acks from each other. The connection is assumed to be
353 /* True if we're connected in extended remote mode. */
356 /* True if we resumed the target and we're waiting for the target to
357 stop. In the mean time, we can't start another command/query.
358 The remote server wouldn't be ready to process it, so we'd
359 timeout waiting for a reply that would never come and eventually
360 we'd close the connection. This can happen in asynchronous mode
361 because we allow GDB commands while the target is running. */
362 int waiting_for_stop_reply
;
364 /* The status of the stub support for the various vCont actions. */
365 struct vCont_action_support supports_vCont
;
367 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
368 responded to that. */
371 /* True if we saw a Ctrl-C while reading or writing from/to the
372 remote descriptor. At that point it is not safe to send a remote
373 interrupt packet, so we instead remember we saw the Ctrl-C and
374 process it once we're done with sending/receiving the current
375 packet, which should be shortly. If however that takes too long,
376 and the user presses Ctrl-C again, we offer to disconnect. */
377 int got_ctrlc_during_io
;
379 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
380 remote_open knows that we don't have a file open when the program
382 struct serial
*remote_desc
;
384 /* These are the threads which we last sent to the remote system. The
385 TID member will be -1 for all or -2 for not sent yet. */
386 ptid_t general_thread
;
387 ptid_t continue_thread
;
389 /* This is the traceframe which we last selected on the remote system.
390 It will be -1 if no traceframe is selected. */
391 int remote_traceframe_number
;
393 char *last_pass_packet
;
395 /* The last QProgramSignals packet sent to the target. We bypass
396 sending a new program signals list down to the target if the new
397 packet is exactly the same as the last we sent. IOW, we only let
398 the target know about program signals list changes. */
399 char *last_program_signals_packet
;
401 enum gdb_signal last_sent_signal
;
405 /* The execution direction of the last resume we got. */
406 enum exec_direction_kind last_resume_exec_dir
;
408 char *finished_object
;
409 char *finished_annex
;
410 ULONGEST finished_offset
;
412 /* Should we try the 'ThreadInfo' query packet?
414 This variable (NOT available to the user: auto-detect only!)
415 determines whether GDB will use the new, simpler "ThreadInfo"
416 query or the older, more complex syntax for thread queries.
417 This is an auto-detect variable (set to true at each connect,
418 and set to false when the target fails to recognize it). */
419 int use_threadinfo_query
;
420 int use_threadextra_query
;
422 threadref echo_nextthread
;
423 threadref nextthread
;
424 threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
426 /* The state of remote notification. */
427 struct remote_notif_state
*notif_state
;
429 /* The branch trace configuration. */
430 struct btrace_config btrace_config
;
432 /* The argument to the last "vFile:setfs:" packet we sent, used
433 to avoid sending repeated unnecessary "vFile:setfs:" packets.
434 Initialized to -1 to indicate that no "vFile:setfs:" packet
435 has yet been sent. */
438 /* A readahead cache for vFile:pread. Often, reading a binary
439 involves a sequence of small reads. E.g., when parsing an ELF
440 file. A readahead cache helps mostly the case of remote
441 debugging on a connection with higher latency, due to the
442 request/reply nature of the RSP. We only cache data for a single
443 file descriptor at a time. */
444 struct readahead_cache readahead_cache
;
447 /* Private data that we'll store in (struct thread_info)->private. */
448 struct private_thread_info
454 /* Whether the target stopped for a breakpoint/watchpoint. */
455 enum target_stop_reason stop_reason
;
457 /* This is set to the data address of the access causing the target
458 to stop for a watchpoint. */
459 CORE_ADDR watch_data_address
;
461 /* Fields used by the vCont action coalescing implemented in
462 remote_resume / remote_commit_resume. remote_resume stores each
463 thread's last resume request in these fields, so that a later
464 remote_commit_resume knows which is the proper action for this
465 thread to include in the vCont packet. */
467 /* True if the last target_resume call for this thread was a step
468 request, false if a continue request. */
469 int last_resume_step
;
471 /* The signal specified in the last target_resume call for this
473 enum gdb_signal last_resume_sig
;
475 /* Whether this thread was already vCont-resumed on the remote
481 free_private_thread_info (struct private_thread_info
*info
)
488 /* This data could be associated with a target, but we do not always
489 have access to the current target when we need it, so for now it is
490 static. This will be fine for as long as only one target is in use
492 static struct remote_state
*remote_state
;
494 static struct remote_state
*
495 get_remote_state_raw (void)
500 /* Allocate a new struct remote_state with xmalloc, initialize it, and
503 static struct remote_state
*
504 new_remote_state (void)
506 struct remote_state
*result
= XCNEW (struct remote_state
);
508 /* The default buffer size is unimportant; it will be expanded
509 whenever a larger buffer is needed. */
510 result
->buf_size
= 400;
511 result
->buf
= (char *) xmalloc (result
->buf_size
);
512 result
->remote_traceframe_number
= -1;
513 result
->last_sent_signal
= GDB_SIGNAL_0
;
514 result
->last_resume_exec_dir
= EXEC_FORWARD
;
520 /* Description of the remote protocol for a given architecture. */
524 long offset
; /* Offset into G packet. */
525 long regnum
; /* GDB's internal register number. */
526 LONGEST pnum
; /* Remote protocol register number. */
527 int in_g_packet
; /* Always part of G packet. */
528 /* long size in bytes; == register_size (target_gdbarch (), regnum);
530 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
534 struct remote_arch_state
536 /* Description of the remote protocol registers. */
537 long sizeof_g_packet
;
539 /* Description of the remote protocol registers indexed by REGNUM
540 (making an array gdbarch_num_regs in size). */
541 struct packet_reg
*regs
;
543 /* This is the size (in chars) of the first response to the ``g''
544 packet. It is used as a heuristic when determining the maximum
545 size of memory-read and memory-write packets. A target will
546 typically only reserve a buffer large enough to hold the ``g''
547 packet. The size does not include packet overhead (headers and
549 long actual_register_packet_size
;
551 /* This is the maximum size (in chars) of a non read/write packet.
552 It is also used as a cap on the size of read/write packets. */
553 long remote_packet_size
;
556 /* Utility: generate error from an incoming stub packet. */
558 trace_error (char *buf
)
561 return; /* not an error msg */
564 case '1': /* malformed packet error */
565 if (*++buf
== '0') /* general case: */
566 error (_("remote.c: error in outgoing packet."));
568 error (_("remote.c: error in outgoing packet at field #%ld."),
569 strtol (buf
, NULL
, 16));
571 error (_("Target returns error code '%s'."), buf
);
575 /* Utility: wait for reply from stub, while accepting "O" packets. */
577 remote_get_noisy_reply (char **buf_p
,
580 do /* Loop on reply from remote stub. */
584 QUIT
; /* Allow user to bail out with ^C. */
585 getpkt (buf_p
, sizeof_buf
, 0);
589 else if (startswith (buf
, "qRelocInsn:"))
592 CORE_ADDR from
, to
, org_to
;
594 int adjusted_size
= 0;
597 p
= buf
+ strlen ("qRelocInsn:");
598 pp
= unpack_varlen_hex (p
, &ul
);
600 error (_("invalid qRelocInsn packet: %s"), buf
);
604 unpack_varlen_hex (p
, &ul
);
611 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
614 CATCH (ex
, RETURN_MASK_ALL
)
616 if (ex
.error
== MEMORY_ERROR
)
618 /* Propagate memory errors silently back to the
619 target. The stub may have limited the range of
620 addresses we can write to, for example. */
624 /* Something unexpectedly bad happened. Be verbose
625 so we can tell what, and propagate the error back
626 to the stub, so it doesn't get stuck waiting for
628 exception_fprintf (gdb_stderr
, ex
,
629 _("warning: relocating instruction: "));
637 adjusted_size
= to
- org_to
;
639 xsnprintf (buf
, *sizeof_buf
, "qRelocInsn:%x", adjusted_size
);
643 else if (buf
[0] == 'O' && buf
[1] != 'K')
644 remote_console_output (buf
+ 1); /* 'O' message from stub */
646 return buf
; /* Here's the actual reply. */
651 /* Handle for retreving the remote protocol data from gdbarch. */
652 static struct gdbarch_data
*remote_gdbarch_data_handle
;
654 static struct remote_arch_state
*
655 get_remote_arch_state (void)
657 gdb_assert (target_gdbarch () != NULL
);
658 return ((struct remote_arch_state
*)
659 gdbarch_data (target_gdbarch (), remote_gdbarch_data_handle
));
662 /* Fetch the global remote target state. */
664 static struct remote_state
*
665 get_remote_state (void)
667 /* Make sure that the remote architecture state has been
668 initialized, because doing so might reallocate rs->buf. Any
669 function which calls getpkt also needs to be mindful of changes
670 to rs->buf, but this call limits the number of places which run
672 get_remote_arch_state ();
674 return get_remote_state_raw ();
677 /* Cleanup routine for the remote module's pspace data. */
680 remote_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
682 char *remote_exec_file
= (char *) arg
;
684 xfree (remote_exec_file
);
687 /* Fetch the remote exec-file from the current program space. */
690 get_remote_exec_file (void)
692 char *remote_exec_file
;
695 = (char *) program_space_data (current_program_space
,
697 if (remote_exec_file
== NULL
)
700 return remote_exec_file
;
703 /* Set the remote exec file for PSPACE. */
706 set_pspace_remote_exec_file (struct program_space
*pspace
,
707 char *remote_exec_file
)
709 char *old_file
= (char *) program_space_data (pspace
, remote_pspace_data
);
712 set_program_space_data (pspace
, remote_pspace_data
,
713 xstrdup (remote_exec_file
));
716 /* The "set/show remote exec-file" set command hook. */
719 set_remote_exec_file (char *ignored
, int from_tty
,
720 struct cmd_list_element
*c
)
722 gdb_assert (remote_exec_file_var
!= NULL
);
723 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
726 /* The "set/show remote exec-file" show command hook. */
729 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
730 struct cmd_list_element
*cmd
, const char *value
)
732 fprintf_filtered (file
, "%s\n", remote_exec_file_var
);
736 compare_pnums (const void *lhs_
, const void *rhs_
)
738 const struct packet_reg
* const *lhs
739 = (const struct packet_reg
* const *) lhs_
;
740 const struct packet_reg
* const *rhs
741 = (const struct packet_reg
* const *) rhs_
;
743 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
745 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
752 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
754 int regnum
, num_remote_regs
, offset
;
755 struct packet_reg
**remote_regs
;
757 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
759 struct packet_reg
*r
= ®s
[regnum
];
761 if (register_size (gdbarch
, regnum
) == 0)
762 /* Do not try to fetch zero-sized (placeholder) registers. */
765 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
770 /* Define the g/G packet format as the contents of each register
771 with a remote protocol number, in order of ascending protocol
774 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
775 for (num_remote_regs
= 0, regnum
= 0;
776 regnum
< gdbarch_num_regs (gdbarch
);
778 if (regs
[regnum
].pnum
!= -1)
779 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
781 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
784 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
786 remote_regs
[regnum
]->in_g_packet
= 1;
787 remote_regs
[regnum
]->offset
= offset
;
788 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
794 /* Given the architecture described by GDBARCH, return the remote
795 protocol register's number and the register's offset in the g/G
796 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
797 If the target does not have a mapping for REGNUM, return false,
798 otherwise, return true. */
801 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
802 int *pnum
, int *poffset
)
804 struct packet_reg
*regs
;
805 struct cleanup
*old_chain
;
807 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
809 regs
= XCNEWVEC (struct packet_reg
, gdbarch_num_regs (gdbarch
));
810 old_chain
= make_cleanup (xfree
, regs
);
812 map_regcache_remote_table (gdbarch
, regs
);
814 *pnum
= regs
[regnum
].pnum
;
815 *poffset
= regs
[regnum
].offset
;
817 do_cleanups (old_chain
);
823 init_remote_state (struct gdbarch
*gdbarch
)
825 struct remote_state
*rs
= get_remote_state_raw ();
826 struct remote_arch_state
*rsa
;
828 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
830 /* Use the architecture to build a regnum<->pnum table, which will be
831 1:1 unless a feature set specifies otherwise. */
832 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
833 gdbarch_num_regs (gdbarch
),
836 /* Record the maximum possible size of the g packet - it may turn out
838 rsa
->sizeof_g_packet
= map_regcache_remote_table (gdbarch
, rsa
->regs
);
840 /* Default maximum number of characters in a packet body. Many
841 remote stubs have a hardwired buffer size of 400 bytes
842 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
843 as the maximum packet-size to ensure that the packet and an extra
844 NUL character can always fit in the buffer. This stops GDB
845 trashing stubs that try to squeeze an extra NUL into what is
846 already a full buffer (As of 1999-12-04 that was most stubs). */
847 rsa
->remote_packet_size
= 400 - 1;
849 /* This one is filled in when a ``g'' packet is received. */
850 rsa
->actual_register_packet_size
= 0;
852 /* Should rsa->sizeof_g_packet needs more space than the
853 default, adjust the size accordingly. Remember that each byte is
854 encoded as two characters. 32 is the overhead for the packet
855 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
856 (``$NN:G...#NN'') is a better guess, the below has been padded a
858 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
859 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
861 /* Make sure that the packet buffer is plenty big enough for
862 this architecture. */
863 if (rs
->buf_size
< rsa
->remote_packet_size
)
865 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
866 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
872 /* Return the current allowed size of a remote packet. This is
873 inferred from the current architecture, and should be used to
874 limit the length of outgoing packets. */
876 get_remote_packet_size (void)
878 struct remote_state
*rs
= get_remote_state ();
879 struct remote_arch_state
*rsa
= get_remote_arch_state ();
881 if (rs
->explicit_packet_size
)
882 return rs
->explicit_packet_size
;
884 return rsa
->remote_packet_size
;
887 static struct packet_reg
*
888 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
890 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch ()))
894 struct packet_reg
*r
= &rsa
->regs
[regnum
];
896 gdb_assert (r
->regnum
== regnum
);
901 static struct packet_reg
*
902 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
906 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch ()); i
++)
908 struct packet_reg
*r
= &rsa
->regs
[i
];
916 static struct target_ops remote_ops
;
918 static struct target_ops extended_remote_ops
;
920 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
921 ``forever'' still use the normal timeout mechanism. This is
922 currently used by the ASYNC code to guarentee that target reads
923 during the initial connect always time-out. Once getpkt has been
924 modified to return a timeout indication and, in turn
925 remote_wait()/wait_for_inferior() have gained a timeout parameter
927 static int wait_forever_enabled_p
= 1;
929 /* Allow the user to specify what sequence to send to the remote
930 when he requests a program interruption: Although ^C is usually
931 what remote systems expect (this is the default, here), it is
932 sometimes preferable to send a break. On other systems such
933 as the Linux kernel, a break followed by g, which is Magic SysRq g
934 is required in order to interrupt the execution. */
935 const char interrupt_sequence_control_c
[] = "Ctrl-C";
936 const char interrupt_sequence_break
[] = "BREAK";
937 const char interrupt_sequence_break_g
[] = "BREAK-g";
938 static const char *const interrupt_sequence_modes
[] =
940 interrupt_sequence_control_c
,
941 interrupt_sequence_break
,
942 interrupt_sequence_break_g
,
945 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
948 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
949 struct cmd_list_element
*c
,
952 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
953 fprintf_filtered (file
,
954 _("Send the ASCII ETX character (Ctrl-c) "
955 "to the remote target to interrupt the "
956 "execution of the program.\n"));
957 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
958 fprintf_filtered (file
,
959 _("send a break signal to the remote target "
960 "to interrupt the execution of the program.\n"));
961 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
962 fprintf_filtered (file
,
963 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
964 "the remote target to interrupt the execution "
965 "of Linux kernel.\n"));
967 internal_error (__FILE__
, __LINE__
,
968 _("Invalid value for interrupt_sequence_mode: %s."),
969 interrupt_sequence_mode
);
972 /* This boolean variable specifies whether interrupt_sequence is sent
973 to the remote target when gdb connects to it.
974 This is mostly needed when you debug the Linux kernel: The Linux kernel
975 expects BREAK g which is Magic SysRq g for connecting gdb. */
976 static int interrupt_on_connect
= 0;
978 /* This variable is used to implement the "set/show remotebreak" commands.
979 Since these commands are now deprecated in favor of "set/show remote
980 interrupt-sequence", it no longer has any effect on the code. */
981 static int remote_break
;
984 set_remotebreak (char *args
, int from_tty
, struct cmd_list_element
*c
)
987 interrupt_sequence_mode
= interrupt_sequence_break
;
989 interrupt_sequence_mode
= interrupt_sequence_control_c
;
993 show_remotebreak (struct ui_file
*file
, int from_tty
,
994 struct cmd_list_element
*c
,
999 /* This variable sets the number of bits in an address that are to be
1000 sent in a memory ("M" or "m") packet. Normally, after stripping
1001 leading zeros, the entire address would be sent. This variable
1002 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
1003 initial implementation of remote.c restricted the address sent in
1004 memory packets to ``host::sizeof long'' bytes - (typically 32
1005 bits). Consequently, for 64 bit targets, the upper 32 bits of an
1006 address was never sent. Since fixing this bug may cause a break in
1007 some remote targets this variable is principly provided to
1008 facilitate backward compatibility. */
1010 static unsigned int remote_address_size
;
1012 /* Temporary to track who currently owns the terminal. See
1013 remote_terminal_* for more details. */
1015 static int remote_async_terminal_ours_p
;
1018 /* User configurable variables for the number of characters in a
1019 memory read/write packet. MIN (rsa->remote_packet_size,
1020 rsa->sizeof_g_packet) is the default. Some targets need smaller
1021 values (fifo overruns, et.al.) and some users need larger values
1022 (speed up transfers). The variables ``preferred_*'' (the user
1023 request), ``current_*'' (what was actually set) and ``forced_*''
1024 (Positive - a soft limit, negative - a hard limit). */
1026 struct memory_packet_config
1033 /* The default max memory-write-packet-size. The 16k is historical.
1034 (It came from older GDB's using alloca for buffers and the
1035 knowledge (folklore?) that some hosts don't cope very well with
1036 large alloca calls.) */
1037 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1039 /* The minimum remote packet size for memory transfers. Ensures we
1040 can write at least one byte. */
1041 #define MIN_MEMORY_PACKET_SIZE 20
1043 /* Compute the current size of a read/write packet. Since this makes
1044 use of ``actual_register_packet_size'' the computation is dynamic. */
1047 get_memory_packet_size (struct memory_packet_config
*config
)
1049 struct remote_state
*rs
= get_remote_state ();
1050 struct remote_arch_state
*rsa
= get_remote_arch_state ();
1053 if (config
->fixed_p
)
1055 if (config
->size
<= 0)
1056 what_they_get
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1058 what_they_get
= config
->size
;
1062 what_they_get
= get_remote_packet_size ();
1063 /* Limit the packet to the size specified by the user. */
1064 if (config
->size
> 0
1065 && what_they_get
> config
->size
)
1066 what_they_get
= config
->size
;
1068 /* Limit it to the size of the targets ``g'' response unless we have
1069 permission from the stub to use a larger packet size. */
1070 if (rs
->explicit_packet_size
== 0
1071 && rsa
->actual_register_packet_size
> 0
1072 && what_they_get
> rsa
->actual_register_packet_size
)
1073 what_they_get
= rsa
->actual_register_packet_size
;
1075 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1076 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1078 /* Make sure there is room in the global buffer for this packet
1079 (including its trailing NUL byte). */
1080 if (rs
->buf_size
< what_they_get
+ 1)
1082 rs
->buf_size
= 2 * what_they_get
;
1083 rs
->buf
= (char *) xrealloc (rs
->buf
, 2 * what_they_get
);
1086 return what_they_get
;
1089 /* Update the size of a read/write packet. If they user wants
1090 something really big then do a sanity check. */
1093 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
1095 int fixed_p
= config
->fixed_p
;
1096 long size
= config
->size
;
1099 error (_("Argument required (integer, `fixed' or `limited')."));
1100 else if (strcmp (args
, "hard") == 0
1101 || strcmp (args
, "fixed") == 0)
1103 else if (strcmp (args
, "soft") == 0
1104 || strcmp (args
, "limit") == 0)
1110 size
= strtoul (args
, &end
, 0);
1112 error (_("Invalid %s (bad syntax)."), config
->name
);
1114 /* Instead of explicitly capping the size of a packet to or
1115 disallowing it, the user is allowed to set the size to
1116 something arbitrarily large. */
1119 /* So that the query shows the correct value. */
1121 size
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1124 if (fixed_p
&& !config
->fixed_p
)
1126 if (! query (_("The target may not be able to correctly handle a %s\n"
1127 "of %ld bytes. Change the packet size? "),
1128 config
->name
, size
))
1129 error (_("Packet size not changed."));
1131 /* Update the config. */
1132 config
->fixed_p
= fixed_p
;
1133 config
->size
= size
;
1137 show_memory_packet_size (struct memory_packet_config
*config
)
1139 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1140 if (config
->fixed_p
)
1141 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1142 get_memory_packet_size (config
));
1144 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1145 get_memory_packet_size (config
));
1148 static struct memory_packet_config memory_write_packet_config
=
1150 "memory-write-packet-size",
1154 set_memory_write_packet_size (char *args
, int from_tty
)
1156 set_memory_packet_size (args
, &memory_write_packet_config
);
1160 show_memory_write_packet_size (char *args
, int from_tty
)
1162 show_memory_packet_size (&memory_write_packet_config
);
1166 get_memory_write_packet_size (void)
1168 return get_memory_packet_size (&memory_write_packet_config
);
1171 static struct memory_packet_config memory_read_packet_config
=
1173 "memory-read-packet-size",
1177 set_memory_read_packet_size (char *args
, int from_tty
)
1179 set_memory_packet_size (args
, &memory_read_packet_config
);
1183 show_memory_read_packet_size (char *args
, int from_tty
)
1185 show_memory_packet_size (&memory_read_packet_config
);
1189 get_memory_read_packet_size (void)
1191 long size
= get_memory_packet_size (&memory_read_packet_config
);
1193 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1194 extra buffer size argument before the memory read size can be
1195 increased beyond this. */
1196 if (size
> get_remote_packet_size ())
1197 size
= get_remote_packet_size ();
1202 /* Generic configuration support for packets the stub optionally
1203 supports. Allows the user to specify the use of the packet as well
1204 as allowing GDB to auto-detect support in the remote stub. */
1208 PACKET_SUPPORT_UNKNOWN
= 0,
1213 struct packet_config
1218 /* If auto, GDB auto-detects support for this packet or feature,
1219 either through qSupported, or by trying the packet and looking
1220 at the response. If true, GDB assumes the target supports this
1221 packet. If false, the packet is disabled. Configs that don't
1222 have an associated command always have this set to auto. */
1223 enum auto_boolean detect
;
1225 /* Does the target support this packet? */
1226 enum packet_support support
;
1229 /* Analyze a packet's return value and update the packet config
1239 static enum packet_support
packet_config_support (struct packet_config
*config
);
1240 static enum packet_support
packet_support (int packet
);
1243 show_packet_config_cmd (struct packet_config
*config
)
1245 char *support
= "internal-error";
1247 switch (packet_config_support (config
))
1250 support
= "enabled";
1252 case PACKET_DISABLE
:
1253 support
= "disabled";
1255 case PACKET_SUPPORT_UNKNOWN
:
1256 support
= "unknown";
1259 switch (config
->detect
)
1261 case AUTO_BOOLEAN_AUTO
:
1262 printf_filtered (_("Support for the `%s' packet "
1263 "is auto-detected, currently %s.\n"),
1264 config
->name
, support
);
1266 case AUTO_BOOLEAN_TRUE
:
1267 case AUTO_BOOLEAN_FALSE
:
1268 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1269 config
->name
, support
);
1275 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1276 const char *title
, int legacy
)
1282 config
->name
= name
;
1283 config
->title
= title
;
1284 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1286 show_doc
= xstrprintf ("Show current use of remote "
1287 "protocol `%s' (%s) packet",
1289 /* set/show TITLE-packet {auto,on,off} */
1290 cmd_name
= xstrprintf ("%s-packet", title
);
1291 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1292 &config
->detect
, set_doc
,
1293 show_doc
, NULL
, /* help_doc */
1295 show_remote_protocol_packet_cmd
,
1296 &remote_set_cmdlist
, &remote_show_cmdlist
);
1297 /* The command code copies the documentation strings. */
1300 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1305 legacy_name
= xstrprintf ("%s-packet", name
);
1306 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1307 &remote_set_cmdlist
);
1308 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1309 &remote_show_cmdlist
);
1313 static enum packet_result
1314 packet_check_result (const char *buf
)
1318 /* The stub recognized the packet request. Check that the
1319 operation succeeded. */
1321 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1323 /* "Enn" - definitly an error. */
1324 return PACKET_ERROR
;
1326 /* Always treat "E." as an error. This will be used for
1327 more verbose error messages, such as E.memtypes. */
1328 if (buf
[0] == 'E' && buf
[1] == '.')
1329 return PACKET_ERROR
;
1331 /* The packet may or may not be OK. Just assume it is. */
1335 /* The stub does not support the packet. */
1336 return PACKET_UNKNOWN
;
1339 static enum packet_result
1340 packet_ok (const char *buf
, struct packet_config
*config
)
1342 enum packet_result result
;
1344 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1345 && config
->support
== PACKET_DISABLE
)
1346 internal_error (__FILE__
, __LINE__
,
1347 _("packet_ok: attempt to use a disabled packet"));
1349 result
= packet_check_result (buf
);
1354 /* The stub recognized the packet request. */
1355 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1358 fprintf_unfiltered (gdb_stdlog
,
1359 "Packet %s (%s) is supported\n",
1360 config
->name
, config
->title
);
1361 config
->support
= PACKET_ENABLE
;
1364 case PACKET_UNKNOWN
:
1365 /* The stub does not support the packet. */
1366 if (config
->detect
== AUTO_BOOLEAN_AUTO
1367 && config
->support
== PACKET_ENABLE
)
1369 /* If the stub previously indicated that the packet was
1370 supported then there is a protocol error. */
1371 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1372 config
->name
, config
->title
);
1374 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1376 /* The user set it wrong. */
1377 error (_("Enabled packet %s (%s) not recognized by stub"),
1378 config
->name
, config
->title
);
1382 fprintf_unfiltered (gdb_stdlog
,
1383 "Packet %s (%s) is NOT supported\n",
1384 config
->name
, config
->title
);
1385 config
->support
= PACKET_DISABLE
;
1406 PACKET_vFile_pwrite
,
1408 PACKET_vFile_unlink
,
1409 PACKET_vFile_readlink
,
1412 PACKET_qXfer_features
,
1413 PACKET_qXfer_exec_file
,
1414 PACKET_qXfer_libraries
,
1415 PACKET_qXfer_libraries_svr4
,
1416 PACKET_qXfer_memory_map
,
1417 PACKET_qXfer_spu_read
,
1418 PACKET_qXfer_spu_write
,
1419 PACKET_qXfer_osdata
,
1420 PACKET_qXfer_threads
,
1421 PACKET_qXfer_statictrace_read
,
1422 PACKET_qXfer_traceframe_info
,
1428 PACKET_QPassSignals
,
1429 PACKET_QCatchSyscalls
,
1430 PACKET_QProgramSignals
,
1432 PACKET_qSearch_memory
,
1435 PACKET_QStartNoAckMode
,
1437 PACKET_qXfer_siginfo_read
,
1438 PACKET_qXfer_siginfo_write
,
1441 /* Support for conditional tracepoints. */
1442 PACKET_ConditionalTracepoints
,
1444 /* Support for target-side breakpoint conditions. */
1445 PACKET_ConditionalBreakpoints
,
1447 /* Support for target-side breakpoint commands. */
1448 PACKET_BreakpointCommands
,
1450 /* Support for fast tracepoints. */
1451 PACKET_FastTracepoints
,
1453 /* Support for static tracepoints. */
1454 PACKET_StaticTracepoints
,
1456 /* Support for installing tracepoints while a trace experiment is
1458 PACKET_InstallInTrace
,
1462 PACKET_TracepointSource
,
1465 PACKET_QDisableRandomization
,
1467 PACKET_QTBuffer_size
,
1471 PACKET_qXfer_btrace
,
1473 /* Support for the QNonStop packet. */
1476 /* Support for the QThreadEvents packet. */
1477 PACKET_QThreadEvents
,
1479 /* Support for multi-process extensions. */
1480 PACKET_multiprocess_feature
,
1482 /* Support for enabling and disabling tracepoints while a trace
1483 experiment is running. */
1484 PACKET_EnableDisableTracepoints_feature
,
1486 /* Support for collecting strings using the tracenz bytecode. */
1487 PACKET_tracenz_feature
,
1489 /* Support for continuing to run a trace experiment while GDB is
1491 PACKET_DisconnectedTracing_feature
,
1493 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1494 PACKET_augmented_libraries_svr4_read_feature
,
1496 /* Support for the qXfer:btrace-conf:read packet. */
1497 PACKET_qXfer_btrace_conf
,
1499 /* Support for the Qbtrace-conf:bts:size packet. */
1500 PACKET_Qbtrace_conf_bts_size
,
1502 /* Support for swbreak+ feature. */
1503 PACKET_swbreak_feature
,
1505 /* Support for hwbreak+ feature. */
1506 PACKET_hwbreak_feature
,
1508 /* Support for fork events. */
1509 PACKET_fork_event_feature
,
1511 /* Support for vfork events. */
1512 PACKET_vfork_event_feature
,
1514 /* Support for the Qbtrace-conf:pt:size packet. */
1515 PACKET_Qbtrace_conf_pt_size
,
1517 /* Support for exec events. */
1518 PACKET_exec_event_feature
,
1520 /* Support for query supported vCont actions. */
1521 PACKET_vContSupported
,
1523 /* Support remote CTRL-C. */
1526 /* Support TARGET_WAITKIND_NO_RESUMED. */
1532 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1534 /* Returns the packet's corresponding "set remote foo-packet" command
1535 state. See struct packet_config for more details. */
1537 static enum auto_boolean
1538 packet_set_cmd_state (int packet
)
1540 return remote_protocol_packets
[packet
].detect
;
1543 /* Returns whether a given packet or feature is supported. This takes
1544 into account the state of the corresponding "set remote foo-packet"
1545 command, which may be used to bypass auto-detection. */
1547 static enum packet_support
1548 packet_config_support (struct packet_config
*config
)
1550 switch (config
->detect
)
1552 case AUTO_BOOLEAN_TRUE
:
1553 return PACKET_ENABLE
;
1554 case AUTO_BOOLEAN_FALSE
:
1555 return PACKET_DISABLE
;
1556 case AUTO_BOOLEAN_AUTO
:
1557 return config
->support
;
1559 gdb_assert_not_reached (_("bad switch"));
1563 /* Same as packet_config_support, but takes the packet's enum value as
1566 static enum packet_support
1567 packet_support (int packet
)
1569 struct packet_config
*config
= &remote_protocol_packets
[packet
];
1571 return packet_config_support (config
);
1575 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1576 struct cmd_list_element
*c
,
1579 struct packet_config
*packet
;
1581 for (packet
= remote_protocol_packets
;
1582 packet
< &remote_protocol_packets
[PACKET_MAX
];
1585 if (&packet
->detect
== c
->var
)
1587 show_packet_config_cmd (packet
);
1591 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1595 /* Should we try one of the 'Z' requests? */
1599 Z_PACKET_SOFTWARE_BP
,
1600 Z_PACKET_HARDWARE_BP
,
1607 /* For compatibility with older distributions. Provide a ``set remote
1608 Z-packet ...'' command that updates all the Z packet types. */
1610 static enum auto_boolean remote_Z_packet_detect
;
1613 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1614 struct cmd_list_element
*c
)
1618 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1619 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1623 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1624 struct cmd_list_element
*c
,
1629 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1631 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1635 /* Returns true if the multi-process extensions are in effect. */
1638 remote_multi_process_p (struct remote_state
*rs
)
1640 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
1643 /* Returns true if fork events are supported. */
1646 remote_fork_event_p (struct remote_state
*rs
)
1648 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
1651 /* Returns true if vfork events are supported. */
1654 remote_vfork_event_p (struct remote_state
*rs
)
1656 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
1659 /* Returns true if exec events are supported. */
1662 remote_exec_event_p (struct remote_state
*rs
)
1664 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
1667 /* Insert fork catchpoint target routine. If fork events are enabled
1668 then return success, nothing more to do. */
1671 remote_insert_fork_catchpoint (struct target_ops
*ops
, int pid
)
1673 struct remote_state
*rs
= get_remote_state ();
1675 return !remote_fork_event_p (rs
);
1678 /* Remove fork catchpoint target routine. Nothing to do, just
1682 remote_remove_fork_catchpoint (struct target_ops
*ops
, int pid
)
1687 /* Insert vfork catchpoint target routine. If vfork events are enabled
1688 then return success, nothing more to do. */
1691 remote_insert_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1693 struct remote_state
*rs
= get_remote_state ();
1695 return !remote_vfork_event_p (rs
);
1698 /* Remove vfork catchpoint target routine. Nothing to do, just
1702 remote_remove_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1707 /* Insert exec catchpoint target routine. If exec events are
1708 enabled, just return success. */
1711 remote_insert_exec_catchpoint (struct target_ops
*ops
, int pid
)
1713 struct remote_state
*rs
= get_remote_state ();
1715 return !remote_exec_event_p (rs
);
1718 /* Remove exec catchpoint target routine. Nothing to do, just
1722 remote_remove_exec_catchpoint (struct target_ops
*ops
, int pid
)
1728 /* Asynchronous signal handle registered as event loop source for
1729 when we have pending events ready to be passed to the core. */
1731 static struct async_event_handler
*remote_async_inferior_event_token
;
1735 static ptid_t magic_null_ptid
;
1736 static ptid_t not_sent_ptid
;
1737 static ptid_t any_thread_ptid
;
1739 /* Find out if the stub attached to PID (and hence GDB should offer to
1740 detach instead of killing it when bailing out). */
1743 remote_query_attached (int pid
)
1745 struct remote_state
*rs
= get_remote_state ();
1746 size_t size
= get_remote_packet_size ();
1748 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
1751 if (remote_multi_process_p (rs
))
1752 xsnprintf (rs
->buf
, size
, "qAttached:%x", pid
);
1754 xsnprintf (rs
->buf
, size
, "qAttached");
1757 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1759 switch (packet_ok (rs
->buf
,
1760 &remote_protocol_packets
[PACKET_qAttached
]))
1763 if (strcmp (rs
->buf
, "1") == 0)
1767 warning (_("Remote failure reply: %s"), rs
->buf
);
1769 case PACKET_UNKNOWN
:
1776 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1777 has been invented by GDB, instead of reported by the target. Since
1778 we can be connected to a remote system before before knowing about
1779 any inferior, mark the target with execution when we find the first
1780 inferior. If ATTACHED is 1, then we had just attached to this
1781 inferior. If it is 0, then we just created this inferior. If it
1782 is -1, then try querying the remote stub to find out if it had
1783 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1784 attempt to open this inferior's executable as the main executable
1785 if no main executable is open already. */
1787 static struct inferior
*
1788 remote_add_inferior (int fake_pid_p
, int pid
, int attached
,
1791 struct inferior
*inf
;
1793 /* Check whether this process we're learning about is to be
1794 considered attached, or if is to be considered to have been
1795 spawned by the stub. */
1797 attached
= remote_query_attached (pid
);
1799 if (gdbarch_has_global_solist (target_gdbarch ()))
1801 /* If the target shares code across all inferiors, then every
1802 attach adds a new inferior. */
1803 inf
= add_inferior (pid
);
1805 /* ... and every inferior is bound to the same program space.
1806 However, each inferior may still have its own address
1808 inf
->aspace
= maybe_new_address_space ();
1809 inf
->pspace
= current_program_space
;
1813 /* In the traditional debugging scenario, there's a 1-1 match
1814 between program/address spaces. We simply bind the inferior
1815 to the program space's address space. */
1816 inf
= current_inferior ();
1817 inferior_appeared (inf
, pid
);
1820 inf
->attach_flag
= attached
;
1821 inf
->fake_pid_p
= fake_pid_p
;
1823 /* If no main executable is currently open then attempt to
1824 open the file that was executed to create this inferior. */
1825 if (try_open_exec
&& get_exec_file (0) == NULL
)
1826 exec_file_locate_attach (pid
, 0, 1);
1831 static struct private_thread_info
*
1832 get_private_info_thread (struct thread_info
*info
);
1834 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1835 according to RUNNING. */
1838 remote_add_thread (ptid_t ptid
, int running
, int executing
)
1840 struct remote_state
*rs
= get_remote_state ();
1841 struct thread_info
*thread
;
1843 /* GDB historically didn't pull threads in the initial connection
1844 setup. If the remote target doesn't even have a concept of
1845 threads (e.g., a bare-metal target), even if internally we
1846 consider that a single-threaded target, mentioning a new thread
1847 might be confusing to the user. Be silent then, preserving the
1848 age old behavior. */
1849 if (rs
->starting_up
)
1850 thread
= add_thread_silent (ptid
);
1852 thread
= add_thread (ptid
);
1854 get_private_info_thread (thread
)->vcont_resumed
= executing
;
1855 set_executing (ptid
, executing
);
1856 set_running (ptid
, running
);
1859 /* Come here when we learn about a thread id from the remote target.
1860 It may be the first time we hear about such thread, so take the
1861 opportunity to add it to GDB's thread list. In case this is the
1862 first time we're noticing its corresponding inferior, add it to
1863 GDB's inferior list as well. EXECUTING indicates whether the
1864 thread is (internally) executing or stopped. */
1867 remote_notice_new_inferior (ptid_t currthread
, int executing
)
1869 /* In non-stop mode, we assume new found threads are (externally)
1870 running until proven otherwise with a stop reply. In all-stop,
1871 we can only get here if all threads are stopped. */
1872 int running
= target_is_non_stop_p () ? 1 : 0;
1874 /* If this is a new thread, add it to GDB's thread list.
1875 If we leave it up to WFI to do this, bad things will happen. */
1877 if (in_thread_list (currthread
) && is_exited (currthread
))
1879 /* We're seeing an event on a thread id we knew had exited.
1880 This has to be a new thread reusing the old id. Add it. */
1881 remote_add_thread (currthread
, running
, executing
);
1885 if (!in_thread_list (currthread
))
1887 struct inferior
*inf
= NULL
;
1888 int pid
= ptid_get_pid (currthread
);
1890 if (ptid_is_pid (inferior_ptid
)
1891 && pid
== ptid_get_pid (inferior_ptid
))
1893 /* inferior_ptid has no thread member yet. This can happen
1894 with the vAttach -> remote_wait,"TAAthread:" path if the
1895 stub doesn't support qC. This is the first stop reported
1896 after an attach, so this is the main thread. Update the
1897 ptid in the thread list. */
1898 if (in_thread_list (pid_to_ptid (pid
)))
1899 thread_change_ptid (inferior_ptid
, currthread
);
1902 remote_add_thread (currthread
, running
, executing
);
1903 inferior_ptid
= currthread
;
1908 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1910 /* inferior_ptid is not set yet. This can happen with the
1911 vRun -> remote_wait,"TAAthread:" path if the stub
1912 doesn't support qC. This is the first stop reported
1913 after an attach, so this is the main thread. Update the
1914 ptid in the thread list. */
1915 thread_change_ptid (inferior_ptid
, currthread
);
1919 /* When connecting to a target remote, or to a target
1920 extended-remote which already was debugging an inferior, we
1921 may not know about it yet. Add it before adding its child
1922 thread, so notifications are emitted in a sensible order. */
1923 if (!in_inferior_list (ptid_get_pid (currthread
)))
1925 struct remote_state
*rs
= get_remote_state ();
1926 int fake_pid_p
= !remote_multi_process_p (rs
);
1928 inf
= remote_add_inferior (fake_pid_p
,
1929 ptid_get_pid (currthread
), -1, 1);
1932 /* This is really a new thread. Add it. */
1933 remote_add_thread (currthread
, running
, executing
);
1935 /* If we found a new inferior, let the common code do whatever
1936 it needs to with it (e.g., read shared libraries, insert
1937 breakpoints), unless we're just setting up an all-stop
1941 struct remote_state
*rs
= get_remote_state ();
1943 if (!rs
->starting_up
)
1944 notice_new_inferior (currthread
, executing
, 0);
1949 /* Return THREAD's private thread data, creating it if necessary. */
1951 static struct private_thread_info
*
1952 get_private_info_thread (struct thread_info
*thread
)
1954 gdb_assert (thread
!= NULL
);
1956 if (thread
->priv
== NULL
)
1958 struct private_thread_info
*priv
= XNEW (struct private_thread_info
);
1960 thread
->private_dtor
= free_private_thread_info
;
1961 thread
->priv
= priv
;
1967 priv
->last_resume_step
= 0;
1968 priv
->last_resume_sig
= GDB_SIGNAL_0
;
1969 priv
->vcont_resumed
= 0;
1972 return thread
->priv
;
1975 /* Return PTID's private thread data, creating it if necessary. */
1977 static struct private_thread_info
*
1978 get_private_info_ptid (ptid_t ptid
)
1980 struct thread_info
*info
= find_thread_ptid (ptid
);
1982 return get_private_info_thread (info
);
1985 /* Call this function as a result of
1986 1) A halt indication (T packet) containing a thread id
1987 2) A direct query of currthread
1988 3) Successful execution of set thread */
1991 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
1993 rs
->general_thread
= currthread
;
1996 /* If 'QPassSignals' is supported, tell the remote stub what signals
1997 it can simply pass through to the inferior without reporting. */
2000 remote_pass_signals (struct target_ops
*self
,
2001 int numsigs
, unsigned char *pass_signals
)
2003 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
2005 char *pass_packet
, *p
;
2007 struct remote_state
*rs
= get_remote_state ();
2009 gdb_assert (numsigs
< 256);
2010 for (i
= 0; i
< numsigs
; i
++)
2012 if (pass_signals
[i
])
2015 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
2016 strcpy (pass_packet
, "QPassSignals:");
2017 p
= pass_packet
+ strlen (pass_packet
);
2018 for (i
= 0; i
< numsigs
; i
++)
2020 if (pass_signals
[i
])
2023 *p
++ = tohex (i
>> 4);
2024 *p
++ = tohex (i
& 15);
2033 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
2035 putpkt (pass_packet
);
2036 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2037 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
2038 if (rs
->last_pass_packet
)
2039 xfree (rs
->last_pass_packet
);
2040 rs
->last_pass_packet
= pass_packet
;
2043 xfree (pass_packet
);
2047 /* If 'QCatchSyscalls' is supported, tell the remote stub
2048 to report syscalls to GDB. */
2051 remote_set_syscall_catchpoint (struct target_ops
*self
,
2052 int pid
, int needed
, int any_count
,
2053 int table_size
, int *table
)
2056 enum packet_result result
;
2059 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2061 /* Not supported. */
2065 if (needed
&& !any_count
)
2069 /* Count how many syscalls are to be caught (table[sysno] != 0). */
2070 for (i
= 0; i
< table_size
; i
++)
2079 fprintf_unfiltered (gdb_stdlog
,
2080 "remote_set_syscall_catchpoint "
2081 "pid %d needed %d any_count %d n_sysno %d\n",
2082 pid
, needed
, any_count
, n_sysno
);
2087 /* Prepare a packet with the sysno list, assuming max 8+1
2088 characters for a sysno. If the resulting packet size is too
2089 big, fallback on the non-selective packet. */
2090 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2092 catch_packet
= (char *) xmalloc (maxpktsz
);
2093 strcpy (catch_packet
, "QCatchSyscalls:1");
2102 /* Add in catch_packet each syscall to be caught (table[i] != 0). */
2103 for (i
= 0; i
< table_size
; i
++)
2106 p
+= xsnprintf (p
, catch_packet
+ maxpktsz
- p
, ";%x", i
);
2109 if (strlen (catch_packet
) > get_remote_packet_size ())
2111 /* catch_packet too big. Fallback to less efficient
2112 non selective mode, with GDB doing the filtering. */
2113 catch_packet
[sizeof ("QCatchSyscalls:1") - 1] = 0;
2117 catch_packet
= xstrdup ("QCatchSyscalls:0");
2120 struct cleanup
*old_chain
= make_cleanup (xfree
, catch_packet
);
2121 struct remote_state
*rs
= get_remote_state ();
2123 putpkt (catch_packet
);
2124 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2125 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2126 do_cleanups (old_chain
);
2127 if (result
== PACKET_OK
)
2134 /* If 'QProgramSignals' is supported, tell the remote stub what
2135 signals it should pass through to the inferior when detaching. */
2138 remote_program_signals (struct target_ops
*self
,
2139 int numsigs
, unsigned char *signals
)
2141 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2145 struct remote_state
*rs
= get_remote_state ();
2147 gdb_assert (numsigs
< 256);
2148 for (i
= 0; i
< numsigs
; i
++)
2153 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2154 strcpy (packet
, "QProgramSignals:");
2155 p
= packet
+ strlen (packet
);
2156 for (i
= 0; i
< numsigs
; i
++)
2158 if (signal_pass_state (i
))
2161 *p
++ = tohex (i
>> 4);
2162 *p
++ = tohex (i
& 15);
2171 if (!rs
->last_program_signals_packet
2172 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2175 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2176 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2177 xfree (rs
->last_program_signals_packet
);
2178 rs
->last_program_signals_packet
= packet
;
2185 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2186 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2187 thread. If GEN is set, set the general thread, if not, then set
2188 the step/continue thread. */
2190 set_thread (struct ptid ptid
, int gen
)
2192 struct remote_state
*rs
= get_remote_state ();
2193 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2194 char *buf
= rs
->buf
;
2195 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
2197 if (ptid_equal (state
, ptid
))
2201 *buf
++ = gen
? 'g' : 'c';
2202 if (ptid_equal (ptid
, magic_null_ptid
))
2203 xsnprintf (buf
, endbuf
- buf
, "0");
2204 else if (ptid_equal (ptid
, any_thread_ptid
))
2205 xsnprintf (buf
, endbuf
- buf
, "0");
2206 else if (ptid_equal (ptid
, minus_one_ptid
))
2207 xsnprintf (buf
, endbuf
- buf
, "-1");
2209 write_ptid (buf
, endbuf
, ptid
);
2211 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2213 rs
->general_thread
= ptid
;
2215 rs
->continue_thread
= ptid
;
2219 set_general_thread (struct ptid ptid
)
2221 set_thread (ptid
, 1);
2225 set_continue_thread (struct ptid ptid
)
2227 set_thread (ptid
, 0);
2230 /* Change the remote current process. Which thread within the process
2231 ends up selected isn't important, as long as it is the same process
2232 as what INFERIOR_PTID points to.
2234 This comes from that fact that there is no explicit notion of
2235 "selected process" in the protocol. The selected process for
2236 general operations is the process the selected general thread
2240 set_general_process (void)
2242 struct remote_state
*rs
= get_remote_state ();
2244 /* If the remote can't handle multiple processes, don't bother. */
2245 if (!remote_multi_process_p (rs
))
2248 /* We only need to change the remote current thread if it's pointing
2249 at some other process. */
2250 if (ptid_get_pid (rs
->general_thread
) != ptid_get_pid (inferior_ptid
))
2251 set_general_thread (inferior_ptid
);
2255 /* Return nonzero if this is the main thread that we made up ourselves
2256 to model non-threaded targets as single-threaded. */
2259 remote_thread_always_alive (struct target_ops
*ops
, ptid_t ptid
)
2261 if (ptid_equal (ptid
, magic_null_ptid
))
2262 /* The main thread is always alive. */
2265 if (ptid_get_pid (ptid
) != 0 && ptid_get_lwp (ptid
) == 0)
2266 /* The main thread is always alive. This can happen after a
2267 vAttach, if the remote side doesn't support
2274 /* Return nonzero if the thread PTID is still alive on the remote
2278 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2280 struct remote_state
*rs
= get_remote_state ();
2283 /* Check if this is a thread that we made up ourselves to model
2284 non-threaded targets as single-threaded. */
2285 if (remote_thread_always_alive (ops
, ptid
))
2289 endp
= rs
->buf
+ get_remote_packet_size ();
2292 write_ptid (p
, endp
, ptid
);
2295 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2296 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2299 /* Return a pointer to a thread name if we know it and NULL otherwise.
2300 The thread_info object owns the memory for the name. */
2303 remote_thread_name (struct target_ops
*ops
, struct thread_info
*info
)
2305 if (info
->priv
!= NULL
)
2306 return info
->priv
->name
;
2311 /* About these extended threadlist and threadinfo packets. They are
2312 variable length packets but, the fields within them are often fixed
2313 length. They are redundent enough to send over UDP as is the
2314 remote protocol in general. There is a matching unit test module
2317 /* WARNING: This threadref data structure comes from the remote O.S.,
2318 libstub protocol encoding, and remote.c. It is not particularly
2321 /* Right now, the internal structure is int. We want it to be bigger.
2322 Plan to fix this. */
2324 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2326 /* gdb_ext_thread_info is an internal GDB data structure which is
2327 equivalent to the reply of the remote threadinfo packet. */
2329 struct gdb_ext_thread_info
2331 threadref threadid
; /* External form of thread reference. */
2332 int active
; /* Has state interesting to GDB?
2334 char display
[256]; /* Brief state display, name,
2335 blocked/suspended. */
2336 char shortname
[32]; /* To be used to name threads. */
2337 char more_display
[256]; /* Long info, statistics, queue depth,
2341 /* The volume of remote transfers can be limited by submitting
2342 a mask containing bits specifying the desired information.
2343 Use a union of these values as the 'selection' parameter to
2344 get_thread_info. FIXME: Make these TAG names more thread specific. */
2346 #define TAG_THREADID 1
2347 #define TAG_EXISTS 2
2348 #define TAG_DISPLAY 4
2349 #define TAG_THREADNAME 8
2350 #define TAG_MOREDISPLAY 16
2352 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2354 static char *unpack_nibble (char *buf
, int *val
);
2356 static char *unpack_byte (char *buf
, int *value
);
2358 static char *pack_int (char *buf
, int value
);
2360 static char *unpack_int (char *buf
, int *value
);
2362 static char *unpack_string (char *src
, char *dest
, int length
);
2364 static char *pack_threadid (char *pkt
, threadref
*id
);
2366 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2368 void int_to_threadref (threadref
*id
, int value
);
2370 static int threadref_to_int (threadref
*ref
);
2372 static void copy_threadref (threadref
*dest
, threadref
*src
);
2374 static int threadmatch (threadref
*dest
, threadref
*src
);
2376 static char *pack_threadinfo_request (char *pkt
, int mode
,
2379 static int remote_unpack_thread_info_response (char *pkt
,
2380 threadref
*expectedref
,
2381 struct gdb_ext_thread_info
2385 static int remote_get_threadinfo (threadref
*threadid
,
2386 int fieldset
, /*TAG mask */
2387 struct gdb_ext_thread_info
*info
);
2389 static char *pack_threadlist_request (char *pkt
, int startflag
,
2391 threadref
*nextthread
);
2393 static int parse_threadlist_response (char *pkt
,
2395 threadref
*original_echo
,
2396 threadref
*resultlist
,
2399 static int remote_get_threadlist (int startflag
,
2400 threadref
*nextthread
,
2404 threadref
*threadlist
);
2406 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
2408 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
2409 void *context
, int looplimit
);
2411 static int remote_newthread_step (threadref
*ref
, void *context
);
2414 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2415 buffer we're allowed to write to. Returns
2416 BUF+CHARACTERS_WRITTEN. */
2419 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2422 struct remote_state
*rs
= get_remote_state ();
2424 if (remote_multi_process_p (rs
))
2426 pid
= ptid_get_pid (ptid
);
2428 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2430 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2432 tid
= ptid_get_lwp (ptid
);
2434 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2436 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2441 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
2442 passed the last parsed char. Returns null_ptid on error. */
2445 read_ptid (char *buf
, char **obuf
)
2449 ULONGEST pid
= 0, tid
= 0;
2453 /* Multi-process ptid. */
2454 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2456 error (_("invalid remote ptid: %s"), p
);
2459 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2462 return ptid_build (pid
, tid
, 0);
2465 /* No multi-process. Just a tid. */
2466 pp
= unpack_varlen_hex (p
, &tid
);
2468 /* Return null_ptid when no thread id is found. */
2476 /* Since the stub is not sending a process id, then default to
2477 what's in inferior_ptid, unless it's null at this point. If so,
2478 then since there's no way to know the pid of the reported
2479 threads, use the magic number. */
2480 if (ptid_equal (inferior_ptid
, null_ptid
))
2481 pid
= ptid_get_pid (magic_null_ptid
);
2483 pid
= ptid_get_pid (inferior_ptid
);
2487 return ptid_build (pid
, tid
, 0);
2493 if (ch
>= 'a' && ch
<= 'f')
2494 return ch
- 'a' + 10;
2495 if (ch
>= '0' && ch
<= '9')
2497 if (ch
>= 'A' && ch
<= 'F')
2498 return ch
- 'A' + 10;
2503 stub_unpack_int (char *buff
, int fieldlength
)
2510 nibble
= stubhex (*buff
++);
2514 retval
= retval
<< 4;
2520 unpack_nibble (char *buf
, int *val
)
2522 *val
= fromhex (*buf
++);
2527 unpack_byte (char *buf
, int *value
)
2529 *value
= stub_unpack_int (buf
, 2);
2534 pack_int (char *buf
, int value
)
2536 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2537 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2538 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2539 buf
= pack_hex_byte (buf
, (value
& 0xff));
2544 unpack_int (char *buf
, int *value
)
2546 *value
= stub_unpack_int (buf
, 8);
2550 #if 0 /* Currently unused, uncomment when needed. */
2551 static char *pack_string (char *pkt
, char *string
);
2554 pack_string (char *pkt
, char *string
)
2559 len
= strlen (string
);
2561 len
= 200; /* Bigger than most GDB packets, junk??? */
2562 pkt
= pack_hex_byte (pkt
, len
);
2566 if ((ch
== '\0') || (ch
== '#'))
2567 ch
= '*'; /* Protect encapsulation. */
2572 #endif /* 0 (unused) */
2575 unpack_string (char *src
, char *dest
, int length
)
2584 pack_threadid (char *pkt
, threadref
*id
)
2587 unsigned char *altid
;
2589 altid
= (unsigned char *) id
;
2590 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2592 pkt
= pack_hex_byte (pkt
, *altid
++);
2598 unpack_threadid (char *inbuf
, threadref
*id
)
2601 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2604 altref
= (char *) id
;
2606 while (inbuf
< limit
)
2608 x
= stubhex (*inbuf
++);
2609 y
= stubhex (*inbuf
++);
2610 *altref
++ = (x
<< 4) | y
;
2615 /* Externally, threadrefs are 64 bits but internally, they are still
2616 ints. This is due to a mismatch of specifications. We would like
2617 to use 64bit thread references internally. This is an adapter
2621 int_to_threadref (threadref
*id
, int value
)
2623 unsigned char *scan
;
2625 scan
= (unsigned char *) id
;
2631 *scan
++ = (value
>> 24) & 0xff;
2632 *scan
++ = (value
>> 16) & 0xff;
2633 *scan
++ = (value
>> 8) & 0xff;
2634 *scan
++ = (value
& 0xff);
2638 threadref_to_int (threadref
*ref
)
2641 unsigned char *scan
;
2647 value
= (value
<< 8) | ((*scan
++) & 0xff);
2652 copy_threadref (threadref
*dest
, threadref
*src
)
2655 unsigned char *csrc
, *cdest
;
2657 csrc
= (unsigned char *) src
;
2658 cdest
= (unsigned char *) dest
;
2665 threadmatch (threadref
*dest
, threadref
*src
)
2667 /* Things are broken right now, so just assume we got a match. */
2669 unsigned char *srcp
, *destp
;
2671 srcp
= (char *) src
;
2672 destp
= (char *) dest
;
2676 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2683 threadid:1, # always request threadid
2690 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2693 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2695 *pkt
++ = 'q'; /* Info Query */
2696 *pkt
++ = 'P'; /* process or thread info */
2697 pkt
= pack_int (pkt
, mode
); /* mode */
2698 pkt
= pack_threadid (pkt
, id
); /* threadid */
2699 *pkt
= '\0'; /* terminate */
2703 /* These values tag the fields in a thread info response packet. */
2704 /* Tagging the fields allows us to request specific fields and to
2705 add more fields as time goes by. */
2707 #define TAG_THREADID 1 /* Echo the thread identifier. */
2708 #define TAG_EXISTS 2 /* Is this process defined enough to
2709 fetch registers and its stack? */
2710 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2711 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2712 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2716 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2717 struct gdb_ext_thread_info
*info
)
2719 struct remote_state
*rs
= get_remote_state ();
2723 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2726 /* info->threadid = 0; FIXME: implement zero_threadref. */
2728 info
->display
[0] = '\0';
2729 info
->shortname
[0] = '\0';
2730 info
->more_display
[0] = '\0';
2732 /* Assume the characters indicating the packet type have been
2734 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2735 pkt
= unpack_threadid (pkt
, &ref
);
2738 warning (_("Incomplete response to threadinfo request."));
2739 if (!threadmatch (&ref
, expectedref
))
2740 { /* This is an answer to a different request. */
2741 warning (_("ERROR RMT Thread info mismatch."));
2744 copy_threadref (&info
->threadid
, &ref
);
2746 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2748 /* Packets are terminated with nulls. */
2749 while ((pkt
< limit
) && mask
&& *pkt
)
2751 pkt
= unpack_int (pkt
, &tag
); /* tag */
2752 pkt
= unpack_byte (pkt
, &length
); /* length */
2753 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2755 warning (_("ERROR RMT: threadinfo tag mismatch."));
2759 if (tag
== TAG_THREADID
)
2763 warning (_("ERROR RMT: length of threadid is not 16."));
2767 pkt
= unpack_threadid (pkt
, &ref
);
2768 mask
= mask
& ~TAG_THREADID
;
2771 if (tag
== TAG_EXISTS
)
2773 info
->active
= stub_unpack_int (pkt
, length
);
2775 mask
= mask
& ~(TAG_EXISTS
);
2778 warning (_("ERROR RMT: 'exists' length too long."));
2784 if (tag
== TAG_THREADNAME
)
2786 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2787 mask
= mask
& ~TAG_THREADNAME
;
2790 if (tag
== TAG_DISPLAY
)
2792 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2793 mask
= mask
& ~TAG_DISPLAY
;
2796 if (tag
== TAG_MOREDISPLAY
)
2798 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2799 mask
= mask
& ~TAG_MOREDISPLAY
;
2802 warning (_("ERROR RMT: unknown thread info tag."));
2803 break; /* Not a tag we know about. */
2809 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2810 struct gdb_ext_thread_info
*info
)
2812 struct remote_state
*rs
= get_remote_state ();
2815 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2817 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2819 if (rs
->buf
[0] == '\0')
2822 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2827 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2830 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2831 threadref
*nextthread
)
2833 *pkt
++ = 'q'; /* info query packet */
2834 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2835 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2836 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2837 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2842 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2845 parse_threadlist_response (char *pkt
, int result_limit
,
2846 threadref
*original_echo
, threadref
*resultlist
,
2849 struct remote_state
*rs
= get_remote_state ();
2851 int count
, resultcount
, done
;
2854 /* Assume the 'q' and 'M chars have been stripped. */
2855 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2856 /* done parse past here */
2857 pkt
= unpack_byte (pkt
, &count
); /* count field */
2858 pkt
= unpack_nibble (pkt
, &done
);
2859 /* The first threadid is the argument threadid. */
2860 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2861 while ((count
-- > 0) && (pkt
< limit
))
2863 pkt
= unpack_threadid (pkt
, resultlist
++);
2864 if (resultcount
++ >= result_limit
)
2872 /* Fetch the next batch of threads from the remote. Returns -1 if the
2873 qL packet is not supported, 0 on error and 1 on success. */
2876 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2877 int *done
, int *result_count
, threadref
*threadlist
)
2879 struct remote_state
*rs
= get_remote_state ();
2882 /* Trancate result limit to be smaller than the packet size. */
2883 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2884 >= get_remote_packet_size ())
2885 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2887 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2889 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2890 if (*rs
->buf
== '\0')
2892 /* Packet not supported. */
2897 parse_threadlist_response (rs
->buf
+ 2, result_limit
,
2898 &rs
->echo_nextthread
, threadlist
, done
);
2900 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
2902 /* FIXME: This is a good reason to drop the packet. */
2903 /* Possably, there is a duplicate response. */
2905 retransmit immediatly - race conditions
2906 retransmit after timeout - yes
2908 wait for packet, then exit
2910 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2911 return 0; /* I choose simply exiting. */
2913 if (*result_count
<= 0)
2917 warning (_("RMT ERROR : failed to get remote thread list."));
2920 return result
; /* break; */
2922 if (*result_count
> result_limit
)
2925 warning (_("RMT ERROR: threadlist response longer than requested."));
2931 /* Fetch the list of remote threads, with the qL packet, and call
2932 STEPFUNCTION for each thread found. Stops iterating and returns 1
2933 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2934 STEPFUNCTION returns false. If the packet is not supported,
2938 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2941 struct remote_state
*rs
= get_remote_state ();
2942 int done
, i
, result_count
;
2950 if (loopcount
++ > looplimit
)
2953 warning (_("Remote fetch threadlist -infinite loop-."));
2956 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
2957 MAXTHREADLISTRESULTS
,
2958 &done
, &result_count
,
2959 rs
->resultthreadlist
);
2962 /* Clear for later iterations. */
2964 /* Setup to resume next batch of thread references, set nextthread. */
2965 if (result_count
>= 1)
2966 copy_threadref (&rs
->nextthread
,
2967 &rs
->resultthreadlist
[result_count
- 1]);
2969 while (result_count
--)
2971 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
2981 /* A thread found on the remote target. */
2983 typedef struct thread_item
2985 /* The thread's PTID. */
2988 /* The thread's extra info. May be NULL. */
2991 /* The thread's name. May be NULL. */
2994 /* The core the thread was running on. -1 if not known. */
2997 DEF_VEC_O(thread_item_t
);
2999 /* Context passed around to the various methods listing remote
3000 threads. As new threads are found, they're added to the ITEMS
3003 struct threads_listing_context
3005 /* The threads found on the remote target. */
3006 VEC (thread_item_t
) *items
;
3009 /* Discard the contents of the constructed thread listing context. */
3012 clear_threads_listing_context (void *p
)
3014 struct threads_listing_context
*context
3015 = (struct threads_listing_context
*) p
;
3017 struct thread_item
*item
;
3019 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
3021 xfree (item
->extra
);
3025 VEC_free (thread_item_t
, context
->items
);
3028 /* Remove the thread specified as the related_pid field of WS
3029 from the CONTEXT list. */
3032 threads_listing_context_remove (struct target_waitstatus
*ws
,
3033 struct threads_listing_context
*context
)
3035 struct thread_item
*item
;
3037 ptid_t child_ptid
= ws
->value
.related_pid
;
3039 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
3041 if (ptid_equal (item
->ptid
, child_ptid
))
3043 VEC_ordered_remove (thread_item_t
, context
->items
, i
);
3050 remote_newthread_step (threadref
*ref
, void *data
)
3052 struct threads_listing_context
*context
3053 = (struct threads_listing_context
*) data
;
3054 struct thread_item item
;
3055 int pid
= ptid_get_pid (inferior_ptid
);
3057 item
.ptid
= ptid_build (pid
, threadref_to_int (ref
), 0);
3062 VEC_safe_push (thread_item_t
, context
->items
, &item
);
3064 return 1; /* continue iterator */
3067 #define CRAZY_MAX_THREADS 1000
3070 remote_current_thread (ptid_t oldpid
)
3072 struct remote_state
*rs
= get_remote_state ();
3075 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3076 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3081 result
= read_ptid (&rs
->buf
[2], &obuf
);
3082 if (*obuf
!= '\0' && remote_debug
)
3083 fprintf_unfiltered (gdb_stdlog
,
3084 "warning: garbage in qC reply\n");
3092 /* List remote threads using the deprecated qL packet. */
3095 remote_get_threads_with_ql (struct target_ops
*ops
,
3096 struct threads_listing_context
*context
)
3098 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3099 CRAZY_MAX_THREADS
) >= 0)
3105 #if defined(HAVE_LIBEXPAT)
3108 start_thread (struct gdb_xml_parser
*parser
,
3109 const struct gdb_xml_element
*element
,
3110 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
3112 struct threads_listing_context
*data
3113 = (struct threads_listing_context
*) user_data
;
3115 struct thread_item item
;
3117 struct gdb_xml_value
*attr
;
3119 id
= (char *) xml_find_attribute (attributes
, "id")->value
;
3120 item
.ptid
= read_ptid (id
, NULL
);
3122 attr
= xml_find_attribute (attributes
, "core");
3124 item
.core
= *(ULONGEST
*) attr
->value
;
3128 attr
= xml_find_attribute (attributes
, "name");
3129 item
.name
= attr
!= NULL
? xstrdup ((const char *) attr
->value
) : NULL
;
3133 VEC_safe_push (thread_item_t
, data
->items
, &item
);
3137 end_thread (struct gdb_xml_parser
*parser
,
3138 const struct gdb_xml_element
*element
,
3139 void *user_data
, const char *body_text
)
3141 struct threads_listing_context
*data
3142 = (struct threads_listing_context
*) user_data
;
3144 if (body_text
&& *body_text
)
3145 VEC_last (thread_item_t
, data
->items
)->extra
= xstrdup (body_text
);
3148 const struct gdb_xml_attribute thread_attributes
[] = {
3149 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3150 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3151 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3152 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3155 const struct gdb_xml_element thread_children
[] = {
3156 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3159 const struct gdb_xml_element threads_children
[] = {
3160 { "thread", thread_attributes
, thread_children
,
3161 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3162 start_thread
, end_thread
},
3163 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3166 const struct gdb_xml_element threads_elements
[] = {
3167 { "threads", NULL
, threads_children
,
3168 GDB_XML_EF_NONE
, NULL
, NULL
},
3169 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3174 /* List remote threads using qXfer:threads:read. */
3177 remote_get_threads_with_qxfer (struct target_ops
*ops
,
3178 struct threads_listing_context
*context
)
3180 #if defined(HAVE_LIBEXPAT)
3181 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3183 char *xml
= target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3184 struct cleanup
*back_to
= make_cleanup (xfree
, xml
);
3186 if (xml
!= NULL
&& *xml
!= '\0')
3188 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3189 threads_elements
, xml
, context
);
3192 do_cleanups (back_to
);
3200 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3203 remote_get_threads_with_qthreadinfo (struct target_ops
*ops
,
3204 struct threads_listing_context
*context
)
3206 struct remote_state
*rs
= get_remote_state ();
3208 if (rs
->use_threadinfo_query
)
3212 putpkt ("qfThreadInfo");
3213 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3215 if (bufp
[0] != '\0') /* q packet recognized */
3217 while (*bufp
++ == 'm') /* reply contains one or more TID */
3221 struct thread_item item
;
3223 item
.ptid
= read_ptid (bufp
, &bufp
);
3228 VEC_safe_push (thread_item_t
, context
->items
, &item
);
3230 while (*bufp
++ == ','); /* comma-separated list */
3231 putpkt ("qsThreadInfo");
3232 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3239 /* Packet not recognized. */
3240 rs
->use_threadinfo_query
= 0;
3247 /* Implement the to_update_thread_list function for the remote
3251 remote_update_thread_list (struct target_ops
*ops
)
3253 struct threads_listing_context context
;
3254 struct cleanup
*old_chain
;
3257 context
.items
= NULL
;
3258 old_chain
= make_cleanup (clear_threads_listing_context
, &context
);
3260 /* We have a few different mechanisms to fetch the thread list. Try
3261 them all, starting with the most preferred one first, falling
3262 back to older methods. */
3263 if (remote_get_threads_with_qxfer (ops
, &context
)
3264 || remote_get_threads_with_qthreadinfo (ops
, &context
)
3265 || remote_get_threads_with_ql (ops
, &context
))
3268 struct thread_item
*item
;
3269 struct thread_info
*tp
, *tmp
;
3273 if (VEC_empty (thread_item_t
, context
.items
)
3274 && remote_thread_always_alive (ops
, inferior_ptid
))
3276 /* Some targets don't really support threads, but still
3277 reply an (empty) thread list in response to the thread
3278 listing packets, instead of replying "packet not
3279 supported". Exit early so we don't delete the main
3281 do_cleanups (old_chain
);
3285 /* CONTEXT now holds the current thread list on the remote
3286 target end. Delete GDB-side threads no longer found on the
3288 ALL_THREADS_SAFE (tp
, tmp
)
3291 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
3294 if (ptid_equal (item
->ptid
, tp
->ptid
))
3298 if (i
== VEC_length (thread_item_t
, context
.items
))
3301 delete_thread (tp
->ptid
);
3305 /* Remove any unreported fork child threads from CONTEXT so
3306 that we don't interfere with follow fork, which is where
3307 creation of such threads is handled. */
3308 remove_new_fork_children (&context
);
3310 /* And now add threads we don't know about yet to our list. */
3312 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
3315 if (!ptid_equal (item
->ptid
, null_ptid
))
3317 struct private_thread_info
*info
;
3318 /* In non-stop mode, we assume new found threads are
3319 executing until proven otherwise with a stop reply.
3320 In all-stop, we can only get here if all threads are
3322 int executing
= target_is_non_stop_p () ? 1 : 0;
3324 remote_notice_new_inferior (item
->ptid
, executing
);
3326 info
= get_private_info_ptid (item
->ptid
);
3327 info
->core
= item
->core
;
3328 info
->extra
= item
->extra
;
3330 info
->name
= item
->name
;
3338 /* If no thread listing method is supported, then query whether
3339 each known thread is alive, one by one, with the T packet.
3340 If the target doesn't support threads at all, then this is a
3341 no-op. See remote_thread_alive. */
3345 do_cleanups (old_chain
);
3349 * Collect a descriptive string about the given thread.
3350 * The target may say anything it wants to about the thread
3351 * (typically info about its blocked / runnable state, name, etc.).
3352 * This string will appear in the info threads display.
3354 * Optional: targets are not required to implement this function.
3358 remote_threads_extra_info (struct target_ops
*self
, struct thread_info
*tp
)
3360 struct remote_state
*rs
= get_remote_state ();
3364 struct gdb_ext_thread_info threadinfo
;
3365 static char display_buf
[100]; /* arbitrary... */
3366 int n
= 0; /* position in display_buf */
3368 if (rs
->remote_desc
== 0) /* paranoia */
3369 internal_error (__FILE__
, __LINE__
,
3370 _("remote_threads_extra_info"));
3372 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
3373 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_lwp (tp
->ptid
) == 0))
3374 /* This is the main thread which was added by GDB. The remote
3375 server doesn't know about it. */
3378 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3380 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
3382 if (info
&& info
->priv
)
3383 return info
->priv
->extra
;
3388 if (rs
->use_threadextra_query
)
3391 char *endb
= rs
->buf
+ get_remote_packet_size ();
3393 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3395 write_ptid (b
, endb
, tp
->ptid
);
3398 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3399 if (rs
->buf
[0] != 0)
3401 n
= std::min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
3402 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
3403 display_buf
[result
] = '\0';
3408 /* If the above query fails, fall back to the old method. */
3409 rs
->use_threadextra_query
= 0;
3410 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3411 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3412 int_to_threadref (&id
, ptid_get_lwp (tp
->ptid
));
3413 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3414 if (threadinfo
.active
)
3416 if (*threadinfo
.shortname
)
3417 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
3418 " Name: %s,", threadinfo
.shortname
);
3419 if (*threadinfo
.display
)
3420 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3421 " State: %s,", threadinfo
.display
);
3422 if (*threadinfo
.more_display
)
3423 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3424 " Priority: %s", threadinfo
.more_display
);
3428 /* For purely cosmetic reasons, clear up trailing commas. */
3429 if (',' == display_buf
[n
-1])
3430 display_buf
[n
-1] = ' ';
3439 remote_static_tracepoint_marker_at (struct target_ops
*self
, CORE_ADDR addr
,
3440 struct static_tracepoint_marker
*marker
)
3442 struct remote_state
*rs
= get_remote_state ();
3445 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3447 p
+= hexnumstr (p
, addr
);
3449 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3453 error (_("Remote failure reply: %s"), p
);
3457 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3464 static VEC(static_tracepoint_marker_p
) *
3465 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3468 struct remote_state
*rs
= get_remote_state ();
3469 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
3470 struct static_tracepoint_marker
*marker
= NULL
;
3471 struct cleanup
*old_chain
;
3474 /* Ask for a first packet of static tracepoint marker
3477 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3480 error (_("Remote failure reply: %s"), p
);
3482 old_chain
= make_cleanup (free_current_marker
, &marker
);
3487 marker
= XCNEW (struct static_tracepoint_marker
);
3491 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3493 if (strid
== NULL
|| strcmp (strid
, marker
->str_id
) == 0)
3495 VEC_safe_push (static_tracepoint_marker_p
,
3501 release_static_tracepoint_marker (marker
);
3502 memset (marker
, 0, sizeof (*marker
));
3505 while (*p
++ == ','); /* comma-separated list */
3506 /* Ask for another packet of static tracepoint definition. */
3508 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3512 do_cleanups (old_chain
);
3517 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3520 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3522 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3526 /* Restart the remote side; this is an extended protocol operation. */
3529 extended_remote_restart (void)
3531 struct remote_state
*rs
= get_remote_state ();
3533 /* Send the restart command; for reasons I don't understand the
3534 remote side really expects a number after the "R". */
3535 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3538 remote_fileio_reset ();
3541 /* Clean up connection to a remote debugger. */
3544 remote_close (struct target_ops
*self
)
3546 struct remote_state
*rs
= get_remote_state ();
3548 if (rs
->remote_desc
== NULL
)
3549 return; /* already closed */
3551 /* Make sure we leave stdin registered in the event loop. */
3552 remote_terminal_ours (self
);
3554 serial_close (rs
->remote_desc
);
3555 rs
->remote_desc
= NULL
;
3557 /* We don't have a connection to the remote stub anymore. Get rid
3558 of all the inferiors and their threads we were controlling.
3559 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3560 will be unable to find the thread corresponding to (pid, 0, 0). */
3561 inferior_ptid
= null_ptid
;
3562 discard_all_inferiors ();
3564 /* We are closing the remote target, so we should discard
3565 everything of this target. */
3566 discard_pending_stop_replies_in_queue (rs
);
3568 if (remote_async_inferior_event_token
)
3569 delete_async_event_handler (&remote_async_inferior_event_token
);
3571 remote_notif_state_xfree (rs
->notif_state
);
3573 trace_reset_local_state ();
3576 /* Query the remote side for the text, data and bss offsets. */
3581 struct remote_state
*rs
= get_remote_state ();
3584 int lose
, num_segments
= 0, do_sections
, do_segments
;
3585 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3586 struct section_offsets
*offs
;
3587 struct symfile_segment_data
*data
;
3589 if (symfile_objfile
== NULL
)
3592 putpkt ("qOffsets");
3593 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3596 if (buf
[0] == '\000')
3597 return; /* Return silently. Stub doesn't support
3601 warning (_("Remote failure reply: %s"), buf
);
3605 /* Pick up each field in turn. This used to be done with scanf, but
3606 scanf will make trouble if CORE_ADDR size doesn't match
3607 conversion directives correctly. The following code will work
3608 with any size of CORE_ADDR. */
3609 text_addr
= data_addr
= bss_addr
= 0;
3613 if (startswith (ptr
, "Text="))
3616 /* Don't use strtol, could lose on big values. */
3617 while (*ptr
&& *ptr
!= ';')
3618 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3620 if (startswith (ptr
, ";Data="))
3623 while (*ptr
&& *ptr
!= ';')
3624 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3629 if (!lose
&& startswith (ptr
, ";Bss="))
3632 while (*ptr
&& *ptr
!= ';')
3633 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3635 if (bss_addr
!= data_addr
)
3636 warning (_("Target reported unsupported offsets: %s"), buf
);
3641 else if (startswith (ptr
, "TextSeg="))
3644 /* Don't use strtol, could lose on big values. */
3645 while (*ptr
&& *ptr
!= ';')
3646 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3649 if (startswith (ptr
, ";DataSeg="))
3652 while (*ptr
&& *ptr
!= ';')
3653 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3661 error (_("Malformed response to offset query, %s"), buf
);
3662 else if (*ptr
!= '\0')
3663 warning (_("Target reported unsupported offsets: %s"), buf
);
3665 offs
= ((struct section_offsets
*)
3666 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3667 memcpy (offs
, symfile_objfile
->section_offsets
,
3668 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3670 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3671 do_segments
= (data
!= NULL
);
3672 do_sections
= num_segments
== 0;
3674 if (num_segments
> 0)
3676 segments
[0] = text_addr
;
3677 segments
[1] = data_addr
;
3679 /* If we have two segments, we can still try to relocate everything
3680 by assuming that the .text and .data offsets apply to the whole
3681 text and data segments. Convert the offsets given in the packet
3682 to base addresses for symfile_map_offsets_to_segments. */
3683 else if (data
&& data
->num_segments
== 2)
3685 segments
[0] = data
->segment_bases
[0] + text_addr
;
3686 segments
[1] = data
->segment_bases
[1] + data_addr
;
3689 /* If the object file has only one segment, assume that it is text
3690 rather than data; main programs with no writable data are rare,
3691 but programs with no code are useless. Of course the code might
3692 have ended up in the data segment... to detect that we would need
3693 the permissions here. */
3694 else if (data
&& data
->num_segments
== 1)
3696 segments
[0] = data
->segment_bases
[0] + text_addr
;
3699 /* There's no way to relocate by segment. */
3705 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3706 offs
, num_segments
, segments
);
3708 if (ret
== 0 && !do_sections
)
3709 error (_("Can not handle qOffsets TextSeg "
3710 "response with this symbol file"));
3717 free_symfile_segment_data (data
);
3721 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3723 /* This is a temporary kludge to force data and bss to use the
3724 same offsets because that's what nlmconv does now. The real
3725 solution requires changes to the stub and remote.c that I
3726 don't have time to do right now. */
3728 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3729 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3732 objfile_relocate (symfile_objfile
, offs
);
3735 /* Send interrupt_sequence to remote target. */
3737 send_interrupt_sequence (void)
3739 struct remote_state
*rs
= get_remote_state ();
3741 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3742 remote_serial_write ("\x03", 1);
3743 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3744 serial_send_break (rs
->remote_desc
);
3745 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3747 serial_send_break (rs
->remote_desc
);
3748 remote_serial_write ("g", 1);
3751 internal_error (__FILE__
, __LINE__
,
3752 _("Invalid value for interrupt_sequence_mode: %s."),
3753 interrupt_sequence_mode
);
3757 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3758 and extract the PTID. Returns NULL_PTID if not found. */
3761 stop_reply_extract_thread (char *stop_reply
)
3763 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3767 /* Txx r:val ; r:val (...) */
3770 /* Look for "register" named "thread". */
3775 p1
= strchr (p
, ':');
3779 if (strncmp (p
, "thread", p1
- p
) == 0)
3780 return read_ptid (++p1
, &p
);
3782 p1
= strchr (p
, ';');
3794 /* Determine the remote side's current thread. If we have a stop
3795 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3796 "thread" register we can extract the current thread from. If not,
3797 ask the remote which is the current thread with qC. The former
3798 method avoids a roundtrip. */
3801 get_current_thread (char *wait_status
)
3803 ptid_t ptid
= null_ptid
;
3805 /* Note we don't use remote_parse_stop_reply as that makes use of
3806 the target architecture, which we haven't yet fully determined at
3808 if (wait_status
!= NULL
)
3809 ptid
= stop_reply_extract_thread (wait_status
);
3810 if (ptid_equal (ptid
, null_ptid
))
3811 ptid
= remote_current_thread (inferior_ptid
);
3816 /* Query the remote target for which is the current thread/process,
3817 add it to our tables, and update INFERIOR_PTID. The caller is
3818 responsible for setting the state such that the remote end is ready
3819 to return the current thread.
3821 This function is called after handling the '?' or 'vRun' packets,
3822 whose response is a stop reply from which we can also try
3823 extracting the thread. If the target doesn't support the explicit
3824 qC query, we infer the current thread from that stop reply, passed
3825 in in WAIT_STATUS, which may be NULL. */
3828 add_current_inferior_and_thread (char *wait_status
)
3830 struct remote_state
*rs
= get_remote_state ();
3834 inferior_ptid
= null_ptid
;
3836 /* Now, if we have thread information, update inferior_ptid. */
3837 ptid
= get_current_thread (wait_status
);
3839 if (!ptid_equal (ptid
, null_ptid
))
3841 if (!remote_multi_process_p (rs
))
3844 inferior_ptid
= ptid
;
3848 /* Without this, some commands which require an active target
3849 (such as kill) won't work. This variable serves (at least)
3850 double duty as both the pid of the target process (if it has
3851 such), and as a flag indicating that a target is active. */
3852 inferior_ptid
= magic_null_ptid
;
3856 remote_add_inferior (fake_pid_p
, ptid_get_pid (inferior_ptid
), -1, 1);
3858 /* Add the main thread. */
3859 add_thread_silent (inferior_ptid
);
3862 /* Print info about a thread that was found already stopped on
3866 print_one_stopped_thread (struct thread_info
*thread
)
3868 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
3870 switch_to_thread (thread
->ptid
);
3871 stop_pc
= get_frame_pc (get_current_frame ());
3872 set_current_sal_from_frame (get_current_frame ());
3874 thread
->suspend
.waitstatus_pending_p
= 0;
3876 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
3878 enum gdb_signal sig
= ws
->value
.sig
;
3880 if (signal_print_state (sig
))
3881 observer_notify_signal_received (sig
);
3883 observer_notify_normal_stop (NULL
, 1);
3886 /* Process all initial stop replies the remote side sent in response
3887 to the ? packet. These indicate threads that were already stopped
3888 on initial connection. We mark these threads as stopped and print
3889 their current frame before giving the user the prompt. */
3892 process_initial_stop_replies (int from_tty
)
3894 int pending_stop_replies
= stop_reply_queue_length ();
3895 struct inferior
*inf
;
3896 struct thread_info
*thread
;
3897 struct thread_info
*selected
= NULL
;
3898 struct thread_info
*lowest_stopped
= NULL
;
3899 struct thread_info
*first
= NULL
;
3901 /* Consume the initial pending events. */
3902 while (pending_stop_replies
-- > 0)
3904 ptid_t waiton_ptid
= minus_one_ptid
;
3906 struct target_waitstatus ws
;
3907 int ignore_event
= 0;
3908 struct thread_info
*thread
;
3910 memset (&ws
, 0, sizeof (ws
));
3911 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3913 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3917 case TARGET_WAITKIND_IGNORE
:
3918 case TARGET_WAITKIND_NO_RESUMED
:
3919 case TARGET_WAITKIND_SIGNALLED
:
3920 case TARGET_WAITKIND_EXITED
:
3921 /* We shouldn't see these, but if we do, just ignore. */
3923 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3927 case TARGET_WAITKIND_EXECD
:
3928 xfree (ws
.value
.execd_pathname
);
3937 thread
= find_thread_ptid (event_ptid
);
3939 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3941 enum gdb_signal sig
= ws
.value
.sig
;
3943 /* Stubs traditionally report SIGTRAP as initial signal,
3944 instead of signal 0. Suppress it. */
3945 if (sig
== GDB_SIGNAL_TRAP
)
3947 thread
->suspend
.stop_signal
= sig
;
3951 thread
->suspend
.waitstatus
= ws
;
3953 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
3954 || ws
.value
.sig
!= GDB_SIGNAL_0
)
3955 thread
->suspend
.waitstatus_pending_p
= 1;
3957 set_executing (event_ptid
, 0);
3958 set_running (event_ptid
, 0);
3959 thread
->priv
->vcont_resumed
= 0;
3962 /* "Notice" the new inferiors before anything related to
3963 registers/memory. */
3969 inf
->needs_setup
= 1;
3973 thread
= any_live_thread_of_process (inf
->pid
);
3974 notice_new_inferior (thread
->ptid
,
3975 thread
->state
== THREAD_RUNNING
,
3980 /* If all-stop on top of non-stop, pause all threads. Note this
3981 records the threads' stop pc, so must be done after "noticing"
3985 stop_all_threads ();
3987 /* If all threads of an inferior were already stopped, we
3988 haven't setup the inferior yet. */
3994 if (inf
->needs_setup
)
3996 thread
= any_live_thread_of_process (inf
->pid
);
3997 switch_to_thread_no_regs (thread
);
4003 /* Now go over all threads that are stopped, and print their current
4004 frame. If all-stop, then if there's a signalled thread, pick
4006 ALL_NON_EXITED_THREADS (thread
)
4012 set_running (thread
->ptid
, 0);
4013 else if (thread
->state
!= THREAD_STOPPED
)
4016 if (selected
== NULL
4017 && thread
->suspend
.waitstatus_pending_p
)
4020 if (lowest_stopped
== NULL
4021 || thread
->inf
->num
< lowest_stopped
->inf
->num
4022 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
4023 lowest_stopped
= thread
;
4026 print_one_stopped_thread (thread
);
4029 /* In all-stop, we only print the status of one thread, and leave
4030 others with their status pending. */
4035 thread
= lowest_stopped
;
4039 print_one_stopped_thread (thread
);
4042 /* For "info program". */
4043 thread
= inferior_thread ();
4044 if (thread
->state
== THREAD_STOPPED
)
4045 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
4048 /* Start the remote connection and sync state. */
4051 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
4053 struct remote_state
*rs
= get_remote_state ();
4054 struct packet_config
*noack_config
;
4055 char *wait_status
= NULL
;
4057 /* Signal other parts that we're going through the initial setup,
4058 and so things may not be stable yet. E.g., we don't try to
4059 install tracepoints until we've relocated symbols. Also, a
4060 Ctrl-C before we're connected and synced up can't interrupt the
4061 target. Instead, it offers to drop the (potentially wedged)
4063 rs
->starting_up
= 1;
4067 if (interrupt_on_connect
)
4068 send_interrupt_sequence ();
4070 /* Ack any packet which the remote side has already sent. */
4071 remote_serial_write ("+", 1);
4073 /* The first packet we send to the target is the optional "supported
4074 packets" request. If the target can answer this, it will tell us
4075 which later probes to skip. */
4076 remote_query_supported ();
4078 /* If the stub wants to get a QAllow, compose one and send it. */
4079 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4080 remote_set_permissions (target
);
4082 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
4083 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
4084 as a reply to known packet. For packet "vFile:setfs:" it is an
4085 invalid reply and GDB would return error in
4086 remote_hostio_set_filesystem, making remote files access impossible.
4087 Disable "vFile:setfs:" in such case. Do not disable other 'v' packets as
4088 other "vFile" packets get correctly detected even on gdbserver < 7.7. */
4090 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4092 putpkt (v_mustreplyempty
);
4093 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4094 if (strcmp (rs
->buf
, "OK") == 0)
4095 remote_protocol_packets
[PACKET_vFile_setfs
].support
= PACKET_DISABLE
;
4096 else if (strcmp (rs
->buf
, "") != 0)
4097 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4101 /* Next, we possibly activate noack mode.
4103 If the QStartNoAckMode packet configuration is set to AUTO,
4104 enable noack mode if the stub reported a wish for it with
4107 If set to TRUE, then enable noack mode even if the stub didn't
4108 report it in qSupported. If the stub doesn't reply OK, the
4109 session ends with an error.
4111 If FALSE, then don't activate noack mode, regardless of what the
4112 stub claimed should be the default with qSupported. */
4114 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4115 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4117 putpkt ("QStartNoAckMode");
4118 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4119 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4125 /* Tell the remote that we are using the extended protocol. */
4127 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4130 /* Let the target know which signals it is allowed to pass down to
4132 update_signals_program_target ();
4134 /* Next, if the target can specify a description, read it. We do
4135 this before anything involving memory or registers. */
4136 target_find_description ();
4138 /* Next, now that we know something about the target, update the
4139 address spaces in the program spaces. */
4140 update_address_spaces ();
4142 /* On OSs where the list of libraries is global to all
4143 processes, we fetch them early. */
4144 if (gdbarch_has_global_solist (target_gdbarch ()))
4145 solib_add (NULL
, from_tty
, target
, auto_solib_add
);
4147 if (target_is_non_stop_p ())
4149 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4150 error (_("Non-stop mode requested, but remote "
4151 "does not support non-stop"));
4153 putpkt ("QNonStop:1");
4154 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4156 if (strcmp (rs
->buf
, "OK") != 0)
4157 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4159 /* Find about threads and processes the stub is already
4160 controlling. We default to adding them in the running state.
4161 The '?' query below will then tell us about which threads are
4163 remote_update_thread_list (target
);
4165 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4167 /* Don't assume that the stub can operate in all-stop mode.
4168 Request it explicitly. */
4169 putpkt ("QNonStop:0");
4170 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4172 if (strcmp (rs
->buf
, "OK") != 0)
4173 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4176 /* Upload TSVs regardless of whether the target is running or not. The
4177 remote stub, such as GDBserver, may have some predefined or builtin
4178 TSVs, even if the target is not running. */
4179 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4181 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4183 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
4184 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4187 /* Check whether the target is running now. */
4189 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4191 if (!target_is_non_stop_p ())
4193 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4196 error (_("The target is not running (try extended-remote?)"));
4198 /* We're connected, but not running. Drop out before we
4199 call start_remote. */
4200 rs
->starting_up
= 0;
4205 /* Save the reply for later. */
4206 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4207 strcpy (wait_status
, rs
->buf
);
4210 /* Fetch thread list. */
4211 target_update_thread_list ();
4213 /* Let the stub know that we want it to return the thread. */
4214 set_continue_thread (minus_one_ptid
);
4216 if (thread_count () == 0)
4218 /* Target has no concept of threads at all. GDB treats
4219 non-threaded target as single-threaded; add a main
4221 add_current_inferior_and_thread (wait_status
);
4225 /* We have thread information; select the thread the target
4226 says should be current. If we're reconnecting to a
4227 multi-threaded program, this will ideally be the thread
4228 that last reported an event before GDB disconnected. */
4229 inferior_ptid
= get_current_thread (wait_status
);
4230 if (ptid_equal (inferior_ptid
, null_ptid
))
4232 /* Odd... The target was able to list threads, but not
4233 tell us which thread was current (no "thread"
4234 register in T stop reply?). Just pick the first
4235 thread in the thread list then. */
4238 fprintf_unfiltered (gdb_stdlog
,
4239 "warning: couldn't determine remote "
4240 "current thread; picking first in list.\n");
4242 inferior_ptid
= thread_list
->ptid
;
4246 /* init_wait_for_inferior should be called before get_offsets in order
4247 to manage `inserted' flag in bp loc in a correct state.
4248 breakpoint_init_inferior, called from init_wait_for_inferior, set
4249 `inserted' flag to 0, while before breakpoint_re_set, called from
4250 start_remote, set `inserted' flag to 1. In the initialization of
4251 inferior, breakpoint_init_inferior should be called first, and then
4252 breakpoint_re_set can be called. If this order is broken, state of
4253 `inserted' flag is wrong, and cause some problems on breakpoint
4255 init_wait_for_inferior ();
4257 get_offsets (); /* Get text, data & bss offsets. */
4259 /* If we could not find a description using qXfer, and we know
4260 how to do it some other way, try again. This is not
4261 supported for non-stop; it could be, but it is tricky if
4262 there are no stopped threads when we connect. */
4263 if (remote_read_description_p (target
)
4264 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4266 target_clear_description ();
4267 target_find_description ();
4270 /* Use the previously fetched status. */
4271 gdb_assert (wait_status
!= NULL
);
4272 strcpy (rs
->buf
, wait_status
);
4273 rs
->cached_wait_status
= 1;
4275 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4279 /* Clear WFI global state. Do this before finding about new
4280 threads and inferiors, and setting the current inferior.
4281 Otherwise we would clear the proceed status of the current
4282 inferior when we want its stop_soon state to be preserved
4283 (see notice_new_inferior). */
4284 init_wait_for_inferior ();
4286 /* In non-stop, we will either get an "OK", meaning that there
4287 are no stopped threads at this time; or, a regular stop
4288 reply. In the latter case, there may be more than one thread
4289 stopped --- we pull them all out using the vStopped
4291 if (strcmp (rs
->buf
, "OK") != 0)
4293 struct notif_client
*notif
= ¬if_client_stop
;
4295 /* remote_notif_get_pending_replies acks this one, and gets
4297 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4298 = remote_notif_parse (notif
, rs
->buf
);
4299 remote_notif_get_pending_events (notif
);
4302 if (thread_count () == 0)
4305 error (_("The target is not running (try extended-remote?)"));
4307 /* We're connected, but not running. Drop out before we
4308 call start_remote. */
4309 rs
->starting_up
= 0;
4313 /* In non-stop mode, any cached wait status will be stored in
4314 the stop reply queue. */
4315 gdb_assert (wait_status
== NULL
);
4317 /* Report all signals during attach/startup. */
4318 remote_pass_signals (target
, 0, NULL
);
4320 /* If there are already stopped threads, mark them stopped and
4321 report their stops before giving the prompt to the user. */
4322 process_initial_stop_replies (from_tty
);
4324 if (target_can_async_p ())
4328 /* If we connected to a live target, do some additional setup. */
4329 if (target_has_execution
)
4331 if (symfile_objfile
) /* No use without a symbol-file. */
4332 remote_check_symbols ();
4335 /* Possibly the target has been engaged in a trace run started
4336 previously; find out where things are at. */
4337 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4339 struct uploaded_tp
*uploaded_tps
= NULL
;
4341 if (current_trace_status ()->running
)
4342 printf_filtered (_("Trace is already running on the target.\n"));
4344 remote_upload_tracepoints (target
, &uploaded_tps
);
4346 merge_uploaded_tracepoints (&uploaded_tps
);
4349 /* Possibly the target has been engaged in a btrace record started
4350 previously; find out where things are at. */
4351 remote_btrace_maybe_reopen ();
4353 /* The thread and inferior lists are now synchronized with the
4354 target, our symbols have been relocated, and we're merged the
4355 target's tracepoints with ours. We're done with basic start
4357 rs
->starting_up
= 0;
4359 /* Maybe breakpoints are global and need to be inserted now. */
4360 if (breakpoints_should_be_inserted_now ())
4361 insert_breakpoints ();
4364 /* Open a connection to a remote debugger.
4365 NAME is the filename used for communication. */
4368 remote_open (const char *name
, int from_tty
)
4370 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4373 /* Open a connection to a remote debugger using the extended
4374 remote gdb protocol. NAME is the filename used for communication. */
4377 extended_remote_open (const char *name
, int from_tty
)
4379 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4382 /* Reset all packets back to "unknown support". Called when opening a
4383 new connection to a remote target. */
4386 reset_all_packet_configs_support (void)
4390 for (i
= 0; i
< PACKET_MAX
; i
++)
4391 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4394 /* Initialize all packet configs. */
4397 init_all_packet_configs (void)
4401 for (i
= 0; i
< PACKET_MAX
; i
++)
4403 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4404 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4408 /* Symbol look-up. */
4411 remote_check_symbols (void)
4413 struct remote_state
*rs
= get_remote_state ();
4414 char *msg
, *reply
, *tmp
;
4417 struct cleanup
*old_chain
;
4419 /* The remote side has no concept of inferiors that aren't running
4420 yet, it only knows about running processes. If we're connected
4421 but our current inferior is not running, we should not invite the
4422 remote target to request symbol lookups related to its
4423 (unrelated) current process. */
4424 if (!target_has_execution
)
4427 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4430 /* Make sure the remote is pointing at the right process. Note
4431 there's no way to select "no process". */
4432 set_general_process ();
4434 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4435 because we need both at the same time. */
4436 msg
= (char *) xmalloc (get_remote_packet_size ());
4437 old_chain
= make_cleanup (xfree
, msg
);
4438 reply
= (char *) xmalloc (get_remote_packet_size ());
4439 make_cleanup (free_current_contents
, &reply
);
4440 reply_size
= get_remote_packet_size ();
4442 /* Invite target to request symbol lookups. */
4444 putpkt ("qSymbol::");
4445 getpkt (&reply
, &reply_size
, 0);
4446 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4448 while (startswith (reply
, "qSymbol:"))
4450 struct bound_minimal_symbol sym
;
4453 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4455 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4456 if (sym
.minsym
== NULL
)
4457 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4460 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4461 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4463 /* If this is a function address, return the start of code
4464 instead of any data function descriptor. */
4465 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4469 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4470 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4474 getpkt (&reply
, &reply_size
, 0);
4477 do_cleanups (old_chain
);
4480 static struct serial
*
4481 remote_serial_open (const char *name
)
4483 static int udp_warning
= 0;
4485 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4486 of in ser-tcp.c, because it is the remote protocol assuming that the
4487 serial connection is reliable and not the serial connection promising
4489 if (!udp_warning
&& startswith (name
, "udp:"))
4491 warning (_("The remote protocol may be unreliable over UDP.\n"
4492 "Some events may be lost, rendering further debugging "
4497 return serial_open (name
);
4500 /* Inform the target of our permission settings. The permission flags
4501 work without this, but if the target knows the settings, it can do
4502 a couple things. First, it can add its own check, to catch cases
4503 that somehow manage to get by the permissions checks in target
4504 methods. Second, if the target is wired to disallow particular
4505 settings (for instance, a system in the field that is not set up to
4506 be able to stop at a breakpoint), it can object to any unavailable
4510 remote_set_permissions (struct target_ops
*self
)
4512 struct remote_state
*rs
= get_remote_state ();
4514 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4515 "WriteReg:%x;WriteMem:%x;"
4516 "InsertBreak:%x;InsertTrace:%x;"
4517 "InsertFastTrace:%x;Stop:%x",
4518 may_write_registers
, may_write_memory
,
4519 may_insert_breakpoints
, may_insert_tracepoints
,
4520 may_insert_fast_tracepoints
, may_stop
);
4522 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4524 /* If the target didn't like the packet, warn the user. Do not try
4525 to undo the user's settings, that would just be maddening. */
4526 if (strcmp (rs
->buf
, "OK") != 0)
4527 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4530 /* This type describes each known response to the qSupported
4532 struct protocol_feature
4534 /* The name of this protocol feature. */
4537 /* The default for this protocol feature. */
4538 enum packet_support default_support
;
4540 /* The function to call when this feature is reported, or after
4541 qSupported processing if the feature is not supported.
4542 The first argument points to this structure. The second
4543 argument indicates whether the packet requested support be
4544 enabled, disabled, or probed (or the default, if this function
4545 is being called at the end of processing and this feature was
4546 not reported). The third argument may be NULL; if not NULL, it
4547 is a NUL-terminated string taken from the packet following
4548 this feature's name and an equals sign. */
4549 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4552 /* The corresponding packet for this feature. Only used if
4553 FUNC is remote_supported_packet. */
4558 remote_supported_packet (const struct protocol_feature
*feature
,
4559 enum packet_support support
,
4560 const char *argument
)
4564 warning (_("Remote qSupported response supplied an unexpected value for"
4565 " \"%s\"."), feature
->name
);
4569 remote_protocol_packets
[feature
->packet
].support
= support
;
4573 remote_packet_size (const struct protocol_feature
*feature
,
4574 enum packet_support support
, const char *value
)
4576 struct remote_state
*rs
= get_remote_state ();
4581 if (support
!= PACKET_ENABLE
)
4584 if (value
== NULL
|| *value
== '\0')
4586 warning (_("Remote target reported \"%s\" without a size."),
4592 packet_size
= strtol (value
, &value_end
, 16);
4593 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4595 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4596 feature
->name
, value
);
4600 /* Record the new maximum packet size. */
4601 rs
->explicit_packet_size
= packet_size
;
4604 static const struct protocol_feature remote_protocol_features
[] = {
4605 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4606 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4607 PACKET_qXfer_auxv
},
4608 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4609 PACKET_qXfer_exec_file
},
4610 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4611 PACKET_qXfer_features
},
4612 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4613 PACKET_qXfer_libraries
},
4614 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4615 PACKET_qXfer_libraries_svr4
},
4616 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4617 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4618 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4619 PACKET_qXfer_memory_map
},
4620 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4621 PACKET_qXfer_spu_read
},
4622 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4623 PACKET_qXfer_spu_write
},
4624 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4625 PACKET_qXfer_osdata
},
4626 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4627 PACKET_qXfer_threads
},
4628 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4629 PACKET_qXfer_traceframe_info
},
4630 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4631 PACKET_QPassSignals
},
4632 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
4633 PACKET_QCatchSyscalls
},
4634 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4635 PACKET_QProgramSignals
},
4636 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4637 PACKET_QStartNoAckMode
},
4638 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4639 PACKET_multiprocess_feature
},
4640 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4641 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4642 PACKET_qXfer_siginfo_read
},
4643 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4644 PACKET_qXfer_siginfo_write
},
4645 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4646 PACKET_ConditionalTracepoints
},
4647 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4648 PACKET_ConditionalBreakpoints
},
4649 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4650 PACKET_BreakpointCommands
},
4651 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4652 PACKET_FastTracepoints
},
4653 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4654 PACKET_StaticTracepoints
},
4655 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4656 PACKET_InstallInTrace
},
4657 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4658 PACKET_DisconnectedTracing_feature
},
4659 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4661 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4663 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4664 PACKET_TracepointSource
},
4665 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4667 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4668 PACKET_EnableDisableTracepoints_feature
},
4669 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4670 PACKET_qXfer_fdpic
},
4671 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4673 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4674 PACKET_QDisableRandomization
},
4675 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4676 { "QTBuffer:size", PACKET_DISABLE
,
4677 remote_supported_packet
, PACKET_QTBuffer_size
},
4678 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4679 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4680 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4681 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4682 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4683 PACKET_qXfer_btrace
},
4684 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4685 PACKET_qXfer_btrace_conf
},
4686 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4687 PACKET_Qbtrace_conf_bts_size
},
4688 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4689 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4690 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4691 PACKET_fork_event_feature
},
4692 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4693 PACKET_vfork_event_feature
},
4694 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4695 PACKET_exec_event_feature
},
4696 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4697 PACKET_Qbtrace_conf_pt_size
},
4698 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
4699 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
4700 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
4703 static char *remote_support_xml
;
4705 /* Register string appended to "xmlRegisters=" in qSupported query. */
4708 register_remote_support_xml (const char *xml
)
4710 #if defined(HAVE_LIBEXPAT)
4711 if (remote_support_xml
== NULL
)
4712 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4715 char *copy
= xstrdup (remote_support_xml
+ 13);
4716 char *p
= strtok (copy
, ",");
4720 if (strcmp (p
, xml
) == 0)
4727 while ((p
= strtok (NULL
, ",")) != NULL
);
4730 remote_support_xml
= reconcat (remote_support_xml
,
4731 remote_support_xml
, ",", xml
,
4738 remote_query_supported_append (char *msg
, const char *append
)
4741 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4743 return xstrdup (append
);
4747 remote_query_supported (void)
4749 struct remote_state
*rs
= get_remote_state ();
4752 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4754 /* The packet support flags are handled differently for this packet
4755 than for most others. We treat an error, a disabled packet, and
4756 an empty response identically: any features which must be reported
4757 to be used will be automatically disabled. An empty buffer
4758 accomplishes this, since that is also the representation for a list
4759 containing no features. */
4762 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4765 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4767 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4768 q
= remote_query_supported_append (q
, "multiprocess+");
4770 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4771 q
= remote_query_supported_append (q
, "swbreak+");
4772 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4773 q
= remote_query_supported_append (q
, "hwbreak+");
4775 q
= remote_query_supported_append (q
, "qRelocInsn+");
4777 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4778 != AUTO_BOOLEAN_FALSE
)
4779 q
= remote_query_supported_append (q
, "fork-events+");
4780 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4781 != AUTO_BOOLEAN_FALSE
)
4782 q
= remote_query_supported_append (q
, "vfork-events+");
4783 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4784 != AUTO_BOOLEAN_FALSE
)
4785 q
= remote_query_supported_append (q
, "exec-events+");
4787 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4788 q
= remote_query_supported_append (q
, "vContSupported+");
4790 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
4791 q
= remote_query_supported_append (q
, "QThreadEvents+");
4793 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
4794 q
= remote_query_supported_append (q
, "no-resumed+");
4796 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4797 the qSupported:xmlRegisters=i386 handling. */
4798 if (remote_support_xml
!= NULL
)
4799 q
= remote_query_supported_append (q
, remote_support_xml
);
4801 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4804 do_cleanups (old_chain
);
4806 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4808 /* If an error occured, warn, but do not return - just reset the
4809 buffer to empty and go on to disable features. */
4810 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4813 warning (_("Remote failure reply: %s"), rs
->buf
);
4818 memset (seen
, 0, sizeof (seen
));
4823 enum packet_support is_supported
;
4824 char *p
, *end
, *name_end
, *value
;
4826 /* First separate out this item from the rest of the packet. If
4827 there's another item after this, we overwrite the separator
4828 (terminated strings are much easier to work with). */
4830 end
= strchr (p
, ';');
4833 end
= p
+ strlen (p
);
4843 warning (_("empty item in \"qSupported\" response"));
4848 name_end
= strchr (p
, '=');
4851 /* This is a name=value entry. */
4852 is_supported
= PACKET_ENABLE
;
4853 value
= name_end
+ 1;
4862 is_supported
= PACKET_ENABLE
;
4866 is_supported
= PACKET_DISABLE
;
4870 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4874 warning (_("unrecognized item \"%s\" "
4875 "in \"qSupported\" response"), p
);
4881 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4882 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4884 const struct protocol_feature
*feature
;
4887 feature
= &remote_protocol_features
[i
];
4888 feature
->func (feature
, is_supported
, value
);
4893 /* If we increased the packet size, make sure to increase the global
4894 buffer size also. We delay this until after parsing the entire
4895 qSupported packet, because this is the same buffer we were
4897 if (rs
->buf_size
< rs
->explicit_packet_size
)
4899 rs
->buf_size
= rs
->explicit_packet_size
;
4900 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4903 /* Handle the defaults for unmentioned features. */
4904 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4907 const struct protocol_feature
*feature
;
4909 feature
= &remote_protocol_features
[i
];
4910 feature
->func (feature
, feature
->default_support
, NULL
);
4914 /* Serial QUIT handler for the remote serial descriptor.
4916 Defers handling a Ctrl-C until we're done with the current
4917 command/response packet sequence, unless:
4919 - We're setting up the connection. Don't send a remote interrupt
4920 request, as we're not fully synced yet. Quit immediately
4923 - The target has been resumed in the foreground
4924 (target_terminal_is_ours is false) with a synchronous resume
4925 packet, and we're blocked waiting for the stop reply, thus a
4926 Ctrl-C should be immediately sent to the target.
4928 - We get a second Ctrl-C while still within the same serial read or
4929 write. In that case the serial is seemingly wedged --- offer to
4932 - We see a second Ctrl-C without target response, after having
4933 previously interrupted the target. In that case the target/stub
4934 is probably wedged --- offer to quit/disconnect.
4938 remote_serial_quit_handler (void)
4940 struct remote_state
*rs
= get_remote_state ();
4942 if (check_quit_flag ())
4944 /* If we're starting up, we're not fully synced yet. Quit
4946 if (rs
->starting_up
)
4948 else if (rs
->got_ctrlc_during_io
)
4950 if (query (_("The target is not responding to GDB commands.\n"
4951 "Stop debugging it? ")))
4952 remote_unpush_and_throw ();
4954 /* If ^C has already been sent once, offer to disconnect. */
4955 else if (!target_terminal_is_ours () && rs
->ctrlc_pending_p
)
4957 /* All-stop protocol, and blocked waiting for stop reply. Send
4958 an interrupt request. */
4959 else if (!target_terminal_is_ours () && rs
->waiting_for_stop_reply
)
4960 target_interrupt (inferior_ptid
);
4962 rs
->got_ctrlc_during_io
= 1;
4966 /* Remove any of the remote.c targets from target stack. Upper targets depend
4967 on it so remove them first. */
4970 remote_unpush_target (void)
4972 pop_all_targets_at_and_above (process_stratum
);
4976 remote_unpush_and_throw (void)
4978 remote_unpush_target ();
4979 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
4983 remote_open_1 (const char *name
, int from_tty
,
4984 struct target_ops
*target
, int extended_p
)
4986 struct remote_state
*rs
= get_remote_state ();
4989 error (_("To open a remote debug connection, you need to specify what\n"
4990 "serial device is attached to the remote system\n"
4991 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4993 /* See FIXME above. */
4994 if (!target_async_permitted
)
4995 wait_forever_enabled_p
= 1;
4997 /* If we're connected to a running target, target_preopen will kill it.
4998 Ask this question first, before target_preopen has a chance to kill
5000 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
5003 && !query (_("Already connected to a remote target. Disconnect? ")))
5004 error (_("Still connected."));
5007 /* Here the possibly existing remote target gets unpushed. */
5008 target_preopen (from_tty
);
5010 /* Make sure we send the passed signals list the next time we resume. */
5011 xfree (rs
->last_pass_packet
);
5012 rs
->last_pass_packet
= NULL
;
5014 /* Make sure we send the program signals list the next time we
5016 xfree (rs
->last_program_signals_packet
);
5017 rs
->last_program_signals_packet
= NULL
;
5019 remote_fileio_reset ();
5020 reopen_exec_file ();
5023 rs
->remote_desc
= remote_serial_open (name
);
5024 if (!rs
->remote_desc
)
5025 perror_with_name (name
);
5027 if (baud_rate
!= -1)
5029 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
5031 /* The requested speed could not be set. Error out to
5032 top level after closing remote_desc. Take care to
5033 set remote_desc to NULL to avoid closing remote_desc
5035 serial_close (rs
->remote_desc
);
5036 rs
->remote_desc
= NULL
;
5037 perror_with_name (name
);
5041 serial_setparity (rs
->remote_desc
, serial_parity
);
5042 serial_raw (rs
->remote_desc
);
5044 /* If there is something sitting in the buffer we might take it as a
5045 response to a command, which would be bad. */
5046 serial_flush_input (rs
->remote_desc
);
5050 puts_filtered ("Remote debugging using ");
5051 puts_filtered (name
);
5052 puts_filtered ("\n");
5054 push_target (target
); /* Switch to using remote target now. */
5056 /* Register extra event sources in the event loop. */
5057 remote_async_inferior_event_token
5058 = create_async_event_handler (remote_async_inferior_event_handler
,
5060 rs
->notif_state
= remote_notif_state_allocate ();
5062 /* Reset the target state; these things will be queried either by
5063 remote_query_supported or as they are needed. */
5064 reset_all_packet_configs_support ();
5065 rs
->cached_wait_status
= 0;
5066 rs
->explicit_packet_size
= 0;
5068 rs
->extended
= extended_p
;
5069 rs
->waiting_for_stop_reply
= 0;
5070 rs
->ctrlc_pending_p
= 0;
5071 rs
->got_ctrlc_during_io
= 0;
5073 rs
->general_thread
= not_sent_ptid
;
5074 rs
->continue_thread
= not_sent_ptid
;
5075 rs
->remote_traceframe_number
= -1;
5077 rs
->last_resume_exec_dir
= EXEC_FORWARD
;
5079 /* Probe for ability to use "ThreadInfo" query, as required. */
5080 rs
->use_threadinfo_query
= 1;
5081 rs
->use_threadextra_query
= 1;
5083 readahead_cache_invalidate ();
5085 /* Start out by owning the terminal. */
5086 remote_async_terminal_ours_p
= 1;
5088 if (target_async_permitted
)
5090 /* FIXME: cagney/1999-09-23: During the initial connection it is
5091 assumed that the target is already ready and able to respond to
5092 requests. Unfortunately remote_start_remote() eventually calls
5093 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
5094 around this. Eventually a mechanism that allows
5095 wait_for_inferior() to expect/get timeouts will be
5097 wait_forever_enabled_p
= 0;
5100 /* First delete any symbols previously loaded from shared libraries. */
5101 no_shared_libraries (NULL
, 0);
5104 init_thread_list ();
5106 /* Start the remote connection. If error() or QUIT, discard this
5107 target (we'd otherwise be in an inconsistent state) and then
5108 propogate the error on up the exception chain. This ensures that
5109 the caller doesn't stumble along blindly assuming that the
5110 function succeeded. The CLI doesn't have this problem but other
5111 UI's, such as MI do.
5113 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5114 this function should return an error indication letting the
5115 caller restore the previous state. Unfortunately the command
5116 ``target remote'' is directly wired to this function making that
5117 impossible. On a positive note, the CLI side of this problem has
5118 been fixed - the function set_cmd_context() makes it possible for
5119 all the ``target ....'' commands to share a common callback
5120 function. See cli-dump.c. */
5125 remote_start_remote (from_tty
, target
, extended_p
);
5127 CATCH (ex
, RETURN_MASK_ALL
)
5129 /* Pop the partially set up target - unless something else did
5130 already before throwing the exception. */
5131 if (rs
->remote_desc
!= NULL
)
5132 remote_unpush_target ();
5133 if (target_async_permitted
)
5134 wait_forever_enabled_p
= 1;
5135 throw_exception (ex
);
5140 remote_btrace_reset ();
5142 if (target_async_permitted
)
5143 wait_forever_enabled_p
= 1;
5146 /* Detach the specified process. */
5149 remote_detach_pid (int pid
)
5151 struct remote_state
*rs
= get_remote_state ();
5153 if (remote_multi_process_p (rs
))
5154 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5156 strcpy (rs
->buf
, "D");
5159 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5161 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5163 else if (rs
->buf
[0] == '\0')
5164 error (_("Remote doesn't know how to detach"));
5166 error (_("Can't detach process."));
5169 /* This detaches a program to which we previously attached, using
5170 inferior_ptid to identify the process. After this is done, GDB
5171 can be used to debug some other program. We better not have left
5172 any breakpoints in the target program or it'll die when it hits
5176 remote_detach_1 (const char *args
, int from_tty
)
5178 int pid
= ptid_get_pid (inferior_ptid
);
5179 struct remote_state
*rs
= get_remote_state ();
5180 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5184 error (_("Argument given to \"detach\" when remotely debugging."));
5186 if (!target_has_execution
)
5187 error (_("No process to detach from."));
5189 target_announce_detach (from_tty
);
5191 /* Tell the remote target to detach. */
5192 remote_detach_pid (pid
);
5194 /* Exit only if this is the only active inferior. */
5195 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5196 puts_filtered (_("Ending remote debugging.\n"));
5198 /* Check to see if we are detaching a fork parent. Note that if we
5199 are detaching a fork child, tp == NULL. */
5200 is_fork_parent
= (tp
!= NULL
5201 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5203 /* If doing detach-on-fork, we don't mourn, because that will delete
5204 breakpoints that should be available for the followed inferior. */
5205 if (!is_fork_parent
)
5206 target_mourn_inferior (inferior_ptid
);
5209 inferior_ptid
= null_ptid
;
5210 detach_inferior (pid
);
5215 remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5217 remote_detach_1 (args
, from_tty
);
5221 extended_remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5223 remote_detach_1 (args
, from_tty
);
5226 /* Target follow-fork function for remote targets. On entry, and
5227 at return, the current inferior is the fork parent.
5229 Note that although this is currently only used for extended-remote,
5230 it is named remote_follow_fork in anticipation of using it for the
5231 remote target as well. */
5234 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5237 struct remote_state
*rs
= get_remote_state ();
5238 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5240 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5241 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5243 /* When following the parent and detaching the child, we detach
5244 the child here. For the case of following the child and
5245 detaching the parent, the detach is done in the target-
5246 independent follow fork code in infrun.c. We can't use
5247 target_detach when detaching an unfollowed child because
5248 the client side doesn't know anything about the child. */
5249 if (detach_fork
&& !follow_child
)
5251 /* Detach the fork child. */
5255 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5256 child_pid
= ptid_get_pid (child_ptid
);
5258 remote_detach_pid (child_pid
);
5259 detach_inferior (child_pid
);
5265 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5266 in the program space of the new inferior. On entry and at return the
5267 current inferior is the exec'ing inferior. INF is the new exec'd
5268 inferior, which may be the same as the exec'ing inferior unless
5269 follow-exec-mode is "new". */
5272 remote_follow_exec (struct target_ops
*ops
,
5273 struct inferior
*inf
, char *execd_pathname
)
5275 /* We know that this is a target file name, so if it has the "target:"
5276 prefix we strip it off before saving it in the program space. */
5277 if (is_target_filename (execd_pathname
))
5278 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5280 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5283 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5286 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5289 error (_("Argument given to \"disconnect\" when remotely debugging."));
5291 /* Make sure we unpush even the extended remote targets. Calling
5292 target_mourn_inferior won't unpush, and remote_mourn won't
5293 unpush if there is more than one inferior left. */
5294 unpush_target (target
);
5295 generic_mourn_inferior ();
5298 puts_filtered ("Ending remote debugging.\n");
5301 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5302 be chatty about it. */
5305 extended_remote_attach (struct target_ops
*target
, const char *args
,
5308 struct remote_state
*rs
= get_remote_state ();
5310 char *wait_status
= NULL
;
5312 pid
= parse_pid_to_attach (args
);
5314 /* Remote PID can be freely equal to getpid, do not check it here the same
5315 way as in other targets. */
5317 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5318 error (_("This target does not support attaching to a process"));
5322 char *exec_file
= get_exec_file (0);
5325 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5326 target_pid_to_str (pid_to_ptid (pid
)));
5328 printf_unfiltered (_("Attaching to %s\n"),
5329 target_pid_to_str (pid_to_ptid (pid
)));
5331 gdb_flush (gdb_stdout
);
5334 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5336 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5338 switch (packet_ok (rs
->buf
,
5339 &remote_protocol_packets
[PACKET_vAttach
]))
5342 if (!target_is_non_stop_p ())
5344 /* Save the reply for later. */
5345 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5346 strcpy (wait_status
, rs
->buf
);
5348 else if (strcmp (rs
->buf
, "OK") != 0)
5349 error (_("Attaching to %s failed with: %s"),
5350 target_pid_to_str (pid_to_ptid (pid
)),
5353 case PACKET_UNKNOWN
:
5354 error (_("This target does not support attaching to a process"));
5356 error (_("Attaching to %s failed"),
5357 target_pid_to_str (pid_to_ptid (pid
)));
5360 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5362 inferior_ptid
= pid_to_ptid (pid
);
5364 if (target_is_non_stop_p ())
5366 struct thread_info
*thread
;
5368 /* Get list of threads. */
5369 remote_update_thread_list (target
);
5371 thread
= first_thread_of_process (pid
);
5373 inferior_ptid
= thread
->ptid
;
5375 inferior_ptid
= pid_to_ptid (pid
);
5377 /* Invalidate our notion of the remote current thread. */
5378 record_currthread (rs
, minus_one_ptid
);
5382 /* Now, if we have thread information, update inferior_ptid. */
5383 inferior_ptid
= remote_current_thread (inferior_ptid
);
5385 /* Add the main thread to the thread list. */
5386 add_thread_silent (inferior_ptid
);
5389 /* Next, if the target can specify a description, read it. We do
5390 this before anything involving memory or registers. */
5391 target_find_description ();
5393 if (!target_is_non_stop_p ())
5395 /* Use the previously fetched status. */
5396 gdb_assert (wait_status
!= NULL
);
5398 if (target_can_async_p ())
5400 struct notif_event
*reply
5401 = remote_notif_parse (¬if_client_stop
, wait_status
);
5403 push_stop_reply ((struct stop_reply
*) reply
);
5409 gdb_assert (wait_status
!= NULL
);
5410 strcpy (rs
->buf
, wait_status
);
5411 rs
->cached_wait_status
= 1;
5415 gdb_assert (wait_status
== NULL
);
5418 /* Implementation of the to_post_attach method. */
5421 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5423 /* Get text, data & bss offsets. */
5426 /* In certain cases GDB might not have had the chance to start
5427 symbol lookup up until now. This could happen if the debugged
5428 binary is not using shared libraries, the vsyscall page is not
5429 present (on Linux) and the binary itself hadn't changed since the
5430 debugging process was started. */
5431 if (symfile_objfile
!= NULL
)
5432 remote_check_symbols();
5436 /* Check for the availability of vCont. This function should also check
5440 remote_vcont_probe (struct remote_state
*rs
)
5444 strcpy (rs
->buf
, "vCont?");
5446 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5449 /* Make sure that the features we assume are supported. */
5450 if (startswith (buf
, "vCont"))
5453 int support_c
, support_C
;
5455 rs
->supports_vCont
.s
= 0;
5456 rs
->supports_vCont
.S
= 0;
5459 rs
->supports_vCont
.t
= 0;
5460 rs
->supports_vCont
.r
= 0;
5461 while (p
&& *p
== ';')
5464 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5465 rs
->supports_vCont
.s
= 1;
5466 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5467 rs
->supports_vCont
.S
= 1;
5468 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5470 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5472 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5473 rs
->supports_vCont
.t
= 1;
5474 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5475 rs
->supports_vCont
.r
= 1;
5477 p
= strchr (p
, ';');
5480 /* If c, and C are not all supported, we can't use vCont. Clearing
5481 BUF will make packet_ok disable the packet. */
5482 if (!support_c
|| !support_C
)
5486 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5489 /* Helper function for building "vCont" resumptions. Write a
5490 resumption to P. ENDP points to one-passed-the-end of the buffer
5491 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5492 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5493 resumed thread should be single-stepped and/or signalled. If PTID
5494 equals minus_one_ptid, then all threads are resumed; if PTID
5495 represents a process, then all threads of the process are resumed;
5496 the thread to be stepped and/or signalled is given in the global
5500 append_resumption (char *p
, char *endp
,
5501 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5503 struct remote_state
*rs
= get_remote_state ();
5505 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5506 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5508 /* GDB is willing to range step. */
5509 && use_range_stepping
5510 /* Target supports range stepping. */
5511 && rs
->supports_vCont
.r
5512 /* We don't currently support range stepping multiple
5513 threads with a wildcard (though the protocol allows it,
5514 so stubs shouldn't make an active effort to forbid
5516 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5518 struct thread_info
*tp
;
5520 if (ptid_equal (ptid
, minus_one_ptid
))
5522 /* If we don't know about the target thread's tid, then
5523 we're resuming magic_null_ptid (see caller). */
5524 tp
= find_thread_ptid (magic_null_ptid
);
5527 tp
= find_thread_ptid (ptid
);
5528 gdb_assert (tp
!= NULL
);
5530 if (tp
->control
.may_range_step
)
5532 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5534 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5535 phex_nz (tp
->control
.step_range_start
,
5537 phex_nz (tp
->control
.step_range_end
,
5541 p
+= xsnprintf (p
, endp
- p
, ";s");
5544 p
+= xsnprintf (p
, endp
- p
, ";s");
5545 else if (siggnal
!= GDB_SIGNAL_0
)
5546 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5548 p
+= xsnprintf (p
, endp
- p
, ";c");
5550 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5554 /* All (-1) threads of process. */
5555 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5557 p
+= xsnprintf (p
, endp
- p
, ":");
5558 p
= write_ptid (p
, endp
, nptid
);
5560 else if (!ptid_equal (ptid
, minus_one_ptid
))
5562 p
+= xsnprintf (p
, endp
- p
, ":");
5563 p
= write_ptid (p
, endp
, ptid
);
5569 /* Clear the thread's private info on resume. */
5572 resume_clear_thread_private_info (struct thread_info
*thread
)
5574 if (thread
->priv
!= NULL
)
5576 thread
->priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5577 thread
->priv
->watch_data_address
= 0;
5581 /* Append a vCont continue-with-signal action for threads that have a
5582 non-zero stop signal. */
5585 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5587 struct thread_info
*thread
;
5589 ALL_NON_EXITED_THREADS (thread
)
5590 if (ptid_match (thread
->ptid
, ptid
)
5591 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5592 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5594 p
= append_resumption (p
, endp
, thread
->ptid
,
5595 0, thread
->suspend
.stop_signal
);
5596 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5597 resume_clear_thread_private_info (thread
);
5603 /* Set the target running, using the packets that use Hc
5607 remote_resume_with_hc (struct target_ops
*ops
,
5608 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5610 struct remote_state
*rs
= get_remote_state ();
5611 struct thread_info
*thread
;
5614 rs
->last_sent_signal
= siggnal
;
5615 rs
->last_sent_step
= step
;
5617 /* The c/s/C/S resume packets use Hc, so set the continue
5619 if (ptid_equal (ptid
, minus_one_ptid
))
5620 set_continue_thread (any_thread_ptid
);
5622 set_continue_thread (ptid
);
5624 ALL_NON_EXITED_THREADS (thread
)
5625 resume_clear_thread_private_info (thread
);
5628 if (execution_direction
== EXEC_REVERSE
)
5630 /* We don't pass signals to the target in reverse exec mode. */
5631 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5632 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5635 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5636 error (_("Remote reverse-step not supported."));
5637 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5638 error (_("Remote reverse-continue not supported."));
5640 strcpy (buf
, step
? "bs" : "bc");
5642 else if (siggnal
!= GDB_SIGNAL_0
)
5644 buf
[0] = step
? 'S' : 'C';
5645 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5646 buf
[2] = tohex (((int) siggnal
) & 0xf);
5650 strcpy (buf
, step
? "s" : "c");
5655 /* Resume the remote inferior by using a "vCont" packet. The thread
5656 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5657 resumed thread should be single-stepped and/or signalled. If PTID
5658 equals minus_one_ptid, then all threads are resumed; the thread to
5659 be stepped and/or signalled is given in the global INFERIOR_PTID.
5660 This function returns non-zero iff it resumes the inferior.
5662 This function issues a strict subset of all possible vCont commands
5666 remote_resume_with_vcont (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5668 struct remote_state
*rs
= get_remote_state ();
5672 /* No reverse execution actions defined for vCont. */
5673 if (execution_direction
== EXEC_REVERSE
)
5676 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5677 remote_vcont_probe (rs
);
5679 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5683 endp
= rs
->buf
+ get_remote_packet_size ();
5685 /* If we could generate a wider range of packets, we'd have to worry
5686 about overflowing BUF. Should there be a generic
5687 "multi-part-packet" packet? */
5689 p
+= xsnprintf (p
, endp
- p
, "vCont");
5691 if (ptid_equal (ptid
, magic_null_ptid
))
5693 /* MAGIC_NULL_PTID means that we don't have any active threads,
5694 so we don't have any TID numbers the inferior will
5695 understand. Make sure to only send forms that do not specify
5697 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5699 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5701 /* Resume all threads (of all processes, or of a single
5702 process), with preference for INFERIOR_PTID. This assumes
5703 inferior_ptid belongs to the set of all threads we are about
5705 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5707 /* Step inferior_ptid, with or without signal. */
5708 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5711 /* Also pass down any pending signaled resumption for other
5712 threads not the current. */
5713 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5715 /* And continue others without a signal. */
5716 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5720 /* Scheduler locking; resume only PTID. */
5721 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5724 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5727 if (target_is_non_stop_p ())
5729 /* In non-stop, the stub replies to vCont with "OK". The stop
5730 reply will be reported asynchronously by means of a `%Stop'
5732 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5733 if (strcmp (rs
->buf
, "OK") != 0)
5734 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5740 /* Tell the remote machine to resume. */
5743 remote_resume (struct target_ops
*ops
,
5744 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5746 struct remote_state
*rs
= get_remote_state ();
5748 /* When connected in non-stop mode, the core resumes threads
5749 individually. Resuming remote threads directly in target_resume
5750 would thus result in sending one packet per thread. Instead, to
5751 minimize roundtrip latency, here we just store the resume
5752 request; the actual remote resumption will be done in
5753 target_commit_resume / remote_commit_resume, where we'll be able
5754 to do vCont action coalescing. */
5755 if (target_is_non_stop_p () && execution_direction
!= EXEC_REVERSE
)
5757 struct private_thread_info
*remote_thr
;
5759 if (ptid_equal (minus_one_ptid
, ptid
) || ptid_is_pid (ptid
))
5760 remote_thr
= get_private_info_ptid (inferior_ptid
);
5762 remote_thr
= get_private_info_ptid (ptid
);
5763 remote_thr
->last_resume_step
= step
;
5764 remote_thr
->last_resume_sig
= siggnal
;
5768 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5769 (explained in remote-notif.c:handle_notification) so
5770 remote_notif_process is not called. We need find a place where
5771 it is safe to start a 'vNotif' sequence. It is good to do it
5772 before resuming inferior, because inferior was stopped and no RSP
5773 traffic at that moment. */
5774 if (!target_is_non_stop_p ())
5775 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5777 rs
->last_resume_exec_dir
= execution_direction
;
5779 /* Prefer vCont, and fallback to s/c/S/C, which use Hc. */
5780 if (!remote_resume_with_vcont (ptid
, step
, siggnal
))
5781 remote_resume_with_hc (ops
, ptid
, step
, siggnal
);
5783 /* We are about to start executing the inferior, let's register it
5784 with the event loop. NOTE: this is the one place where all the
5785 execution commands end up. We could alternatively do this in each
5786 of the execution commands in infcmd.c. */
5787 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5788 into infcmd.c in order to allow inferior function calls to work
5789 NOT asynchronously. */
5790 if (target_can_async_p ())
5793 /* We've just told the target to resume. The remote server will
5794 wait for the inferior to stop, and then send a stop reply. In
5795 the mean time, we can't start another command/query ourselves
5796 because the stub wouldn't be ready to process it. This applies
5797 only to the base all-stop protocol, however. In non-stop (which
5798 only supports vCont), the stub replies with an "OK", and is
5799 immediate able to process further serial input. */
5800 if (!target_is_non_stop_p ())
5801 rs
->waiting_for_stop_reply
= 1;
5804 static void check_pending_events_prevent_wildcard_vcont
5805 (int *may_global_wildcard_vcont
);
5806 static int is_pending_fork_parent_thread (struct thread_info
*thread
);
5808 /* Private per-inferior info for target remote processes. */
5810 struct private_inferior
5812 /* Whether we can send a wildcard vCont for this process. */
5813 int may_wildcard_vcont
;
5816 /* Structure used to track the construction of a vCont packet in the
5817 outgoing packet buffer. This is used to send multiple vCont
5818 packets if we have more actions than would fit a single packet. */
5820 struct vcont_builder
5822 /* Pointer to the first action. P points here if no action has been
5826 /* Where the next action will be appended. */
5829 /* The end of the buffer. Must never write past this. */
5833 /* Prepare the outgoing buffer for a new vCont packet. */
5836 vcont_builder_restart (struct vcont_builder
*builder
)
5838 struct remote_state
*rs
= get_remote_state ();
5840 builder
->p
= rs
->buf
;
5841 builder
->endp
= rs
->buf
+ get_remote_packet_size ();
5842 builder
->p
+= xsnprintf (builder
->p
, builder
->endp
- builder
->p
, "vCont");
5843 builder
->first_action
= builder
->p
;
5846 /* If the vCont packet being built has any action, send it to the
5850 vcont_builder_flush (struct vcont_builder
*builder
)
5852 struct remote_state
*rs
;
5854 if (builder
->p
== builder
->first_action
)
5857 rs
= get_remote_state ();
5859 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5860 if (strcmp (rs
->buf
, "OK") != 0)
5861 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5864 /* The largest action is range-stepping, with its two addresses. This
5865 is more than sufficient. If a new, bigger action is created, it'll
5866 quickly trigger a failed assertion in append_resumption (and we'll
5868 #define MAX_ACTION_SIZE 200
5870 /* Append a new vCont action in the outgoing packet being built. If
5871 the action doesn't fit the packet along with previous actions, push
5872 what we've got so far to the remote end and start over a new vCont
5873 packet (with the new action). */
5876 vcont_builder_push_action (struct vcont_builder
*builder
,
5877 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5879 char buf
[MAX_ACTION_SIZE
+ 1];
5883 endp
= append_resumption (buf
, buf
+ sizeof (buf
),
5884 ptid
, step
, siggnal
);
5886 /* Check whether this new action would fit in the vCont packet along
5887 with previous actions. If not, send what we've got so far and
5888 start a new vCont packet. */
5890 if (rsize
> builder
->endp
- builder
->p
)
5892 vcont_builder_flush (builder
);
5893 vcont_builder_restart (builder
);
5895 /* Should now fit. */
5896 gdb_assert (rsize
<= builder
->endp
- builder
->p
);
5899 memcpy (builder
->p
, buf
, rsize
);
5900 builder
->p
+= rsize
;
5904 /* to_commit_resume implementation. */
5907 remote_commit_resume (struct target_ops
*ops
)
5909 struct remote_state
*rs
= get_remote_state ();
5910 struct inferior
*inf
;
5911 struct thread_info
*tp
;
5912 int any_process_wildcard
;
5913 int may_global_wildcard_vcont
;
5914 struct vcont_builder vcont_builder
;
5916 /* If connected in all-stop mode, we'd send the remote resume
5917 request directly from remote_resume. Likewise if
5918 reverse-debugging, as there are no defined vCont actions for
5919 reverse execution. */
5920 if (!target_is_non_stop_p () || execution_direction
== EXEC_REVERSE
)
5923 /* Try to send wildcard actions ("vCont;c" or "vCont;c:pPID.-1")
5924 instead of resuming all threads of each process individually.
5925 However, if any thread of a process must remain halted, we can't
5926 send wildcard resumes and must send one action per thread.
5928 Care must be taken to not resume threads/processes the server
5929 side already told us are stopped, but the core doesn't know about
5930 yet, because the events are still in the vStopped notification
5933 #1 => vCont s:p1.1;c
5935 #3 <= %Stopped T05 p1.1
5940 #8 (infrun handles the stop for p1.1 and continues stepping)
5941 #9 => vCont s:p1.1;c
5943 The last vCont above would resume thread p1.2 by mistake, because
5944 the server has no idea that the event for p1.2 had not been
5947 The server side must similarly ignore resume actions for the
5948 thread that has a pending %Stopped notification (and any other
5949 threads with events pending), until GDB acks the notification
5950 with vStopped. Otherwise, e.g., the following case is
5953 #1 => g (or any other packet)
5955 #3 <= %Stopped T05 p1.2
5956 #4 => vCont s:p1.1;c
5959 Above, the server must not resume thread p1.2. GDB can't know
5960 that p1.2 stopped until it acks the %Stopped notification, and
5961 since from GDB's perspective all threads should be running, it
5964 Finally, special care must also be given to handling fork/vfork
5965 events. A (v)fork event actually tells us that two processes
5966 stopped -- the parent and the child. Until we follow the fork,
5967 we must not resume the child. Therefore, if we have a pending
5968 fork follow, we must not send a global wildcard resume action
5969 (vCont;c). We can still send process-wide wildcards though. */
5971 /* Start by assuming a global wildcard (vCont;c) is possible. */
5972 may_global_wildcard_vcont
= 1;
5974 /* And assume every process is individually wildcard-able too. */
5975 ALL_NON_EXITED_INFERIORS (inf
)
5977 if (inf
->priv
== NULL
)
5978 inf
->priv
= XNEW (struct private_inferior
);
5979 inf
->priv
->may_wildcard_vcont
= 1;
5982 /* Check for any pending events (not reported or processed yet) and
5983 disable process and global wildcard resumes appropriately. */
5984 check_pending_events_prevent_wildcard_vcont (&may_global_wildcard_vcont
);
5986 ALL_NON_EXITED_THREADS (tp
)
5988 /* If a thread of a process is not meant to be resumed, then we
5989 can't wildcard that process. */
5992 tp
->inf
->priv
->may_wildcard_vcont
= 0;
5994 /* And if we can't wildcard a process, we can't wildcard
5995 everything either. */
5996 may_global_wildcard_vcont
= 0;
6000 /* If a thread is the parent of an unfollowed fork, then we
6001 can't do a global wildcard, as that would resume the fork
6003 if (is_pending_fork_parent_thread (tp
))
6004 may_global_wildcard_vcont
= 0;
6007 /* Now let's build the vCont packet(s). Actions must be appended
6008 from narrower to wider scopes (thread -> process -> global). If
6009 we end up with too many actions for a single packet vcont_builder
6010 flushes the current vCont packet to the remote side and starts a
6012 vcont_builder_restart (&vcont_builder
);
6014 /* Threads first. */
6015 ALL_NON_EXITED_THREADS (tp
)
6017 struct private_thread_info
*remote_thr
= tp
->priv
;
6019 if (!tp
->executing
|| remote_thr
->vcont_resumed
)
6022 gdb_assert (!thread_is_in_step_over_chain (tp
));
6024 if (!remote_thr
->last_resume_step
6025 && remote_thr
->last_resume_sig
== GDB_SIGNAL_0
6026 && tp
->inf
->priv
->may_wildcard_vcont
)
6028 /* We'll send a wildcard resume instead. */
6029 remote_thr
->vcont_resumed
= 1;
6033 vcont_builder_push_action (&vcont_builder
, tp
->ptid
,
6034 remote_thr
->last_resume_step
,
6035 remote_thr
->last_resume_sig
);
6036 remote_thr
->vcont_resumed
= 1;
6039 /* Now check whether we can send any process-wide wildcard. This is
6040 to avoid sending a global wildcard in the case nothing is
6041 supposed to be resumed. */
6042 any_process_wildcard
= 0;
6044 ALL_NON_EXITED_INFERIORS (inf
)
6046 if (inf
->priv
->may_wildcard_vcont
)
6048 any_process_wildcard
= 1;
6053 if (any_process_wildcard
)
6055 /* If all processes are wildcard-able, then send a single "c"
6056 action, otherwise, send an "all (-1) threads of process"
6057 continue action for each running process, if any. */
6058 if (may_global_wildcard_vcont
)
6060 vcont_builder_push_action (&vcont_builder
, minus_one_ptid
,
6065 ALL_NON_EXITED_INFERIORS (inf
)
6067 if (inf
->priv
->may_wildcard_vcont
)
6069 vcont_builder_push_action (&vcont_builder
,
6070 pid_to_ptid (inf
->pid
),
6077 vcont_builder_flush (&vcont_builder
);
6082 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
6083 thread, all threads of a remote process, or all threads of all
6087 remote_stop_ns (ptid_t ptid
)
6089 struct remote_state
*rs
= get_remote_state ();
6091 char *endp
= rs
->buf
+ get_remote_packet_size ();
6093 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
6094 remote_vcont_probe (rs
);
6096 if (!rs
->supports_vCont
.t
)
6097 error (_("Remote server does not support stopping threads"));
6099 if (ptid_equal (ptid
, minus_one_ptid
)
6100 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
6101 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
6106 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
6108 if (ptid_is_pid (ptid
))
6109 /* All (-1) threads of process. */
6110 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
6113 /* Small optimization: if we already have a stop reply for
6114 this thread, no use in telling the stub we want this
6116 if (peek_stop_reply (ptid
))
6122 write_ptid (p
, endp
, nptid
);
6125 /* In non-stop, we get an immediate OK reply. The stop reply will
6126 come in asynchronously by notification. */
6128 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6129 if (strcmp (rs
->buf
, "OK") != 0)
6130 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
6133 /* All-stop version of target_interrupt. Sends a break or a ^C to
6134 interrupt the remote target. It is undefined which thread of which
6135 process reports the interrupt. */
6138 remote_interrupt_as (void)
6140 struct remote_state
*rs
= get_remote_state ();
6142 rs
->ctrlc_pending_p
= 1;
6144 /* If the inferior is stopped already, but the core didn't know
6145 about it yet, just ignore the request. The cached wait status
6146 will be collected in remote_wait. */
6147 if (rs
->cached_wait_status
)
6150 /* Send interrupt_sequence to remote target. */
6151 send_interrupt_sequence ();
6154 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
6155 the remote target. It is undefined which thread of which process
6156 reports the interrupt. Throws an error if the packet is not
6157 supported by the server. */
6160 remote_interrupt_ns (void)
6162 struct remote_state
*rs
= get_remote_state ();
6164 char *endp
= rs
->buf
+ get_remote_packet_size ();
6166 xsnprintf (p
, endp
- p
, "vCtrlC");
6168 /* In non-stop, we get an immediate OK reply. The stop reply will
6169 come in asynchronously by notification. */
6171 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6173 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
6177 case PACKET_UNKNOWN
:
6178 error (_("No support for interrupting the remote target."));
6180 error (_("Interrupting target failed: %s"), rs
->buf
);
6184 /* Implement the to_stop function for the remote targets. */
6187 remote_stop (struct target_ops
*self
, ptid_t ptid
)
6190 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
6192 if (target_is_non_stop_p ())
6193 remote_stop_ns (ptid
);
6196 /* We don't currently have a way to transparently pause the
6197 remote target in all-stop mode. Interrupt it instead. */
6198 remote_interrupt_as ();
6202 /* Implement the to_interrupt function for the remote targets. */
6205 remote_interrupt (struct target_ops
*self
, ptid_t ptid
)
6207 struct remote_state
*rs
= get_remote_state ();
6210 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
6212 if (target_is_non_stop_p ())
6213 remote_interrupt_ns ();
6215 remote_interrupt_as ();
6218 /* Implement the to_pass_ctrlc function for the remote targets. */
6221 remote_pass_ctrlc (struct target_ops
*self
)
6223 struct remote_state
*rs
= get_remote_state ();
6226 fprintf_unfiltered (gdb_stdlog
, "remote_pass_ctrlc called\n");
6228 /* If we're starting up, we're not fully synced yet. Quit
6230 if (rs
->starting_up
)
6232 /* If ^C has already been sent once, offer to disconnect. */
6233 else if (rs
->ctrlc_pending_p
)
6236 target_interrupt (inferior_ptid
);
6239 /* Ask the user what to do when an interrupt is received. */
6242 interrupt_query (void)
6244 struct remote_state
*rs
= get_remote_state ();
6246 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
6248 if (query (_("The target is not responding to interrupt requests.\n"
6249 "Stop debugging it? ")))
6251 remote_unpush_target ();
6252 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
6257 if (query (_("Interrupted while waiting for the program.\n"
6258 "Give up waiting? ")))
6263 /* Enable/disable target terminal ownership. Most targets can use
6264 terminal groups to control terminal ownership. Remote targets are
6265 different in that explicit transfer of ownership to/from GDB/target
6269 remote_terminal_inferior (struct target_ops
*self
)
6271 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
6272 idempotent. The event-loop GDB talking to an asynchronous target
6273 with a synchronous command calls this function from both
6274 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
6275 transfer the terminal to the target when it shouldn't this guard
6277 if (!remote_async_terminal_ours_p
)
6279 remote_async_terminal_ours_p
= 0;
6280 /* NOTE: At this point we could also register our selves as the
6281 recipient of all input. Any characters typed could then be
6282 passed on down to the target. */
6286 remote_terminal_ours (struct target_ops
*self
)
6288 /* See FIXME in remote_terminal_inferior. */
6289 if (remote_async_terminal_ours_p
)
6291 remote_async_terminal_ours_p
= 1;
6295 remote_console_output (char *msg
)
6299 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6302 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6306 fputs_unfiltered (tb
, gdb_stdtarg
);
6308 gdb_flush (gdb_stdtarg
);
6311 typedef struct cached_reg
6314 gdb_byte data
[MAX_REGISTER_SIZE
];
6317 DEF_VEC_O(cached_reg_t
);
6319 typedef struct stop_reply
6321 struct notif_event base
;
6323 /* The identifier of the thread about this event */
6326 /* The remote state this event is associated with. When the remote
6327 connection, represented by a remote_state object, is closed,
6328 all the associated stop_reply events should be released. */
6329 struct remote_state
*rs
;
6331 struct target_waitstatus ws
;
6333 /* Expedited registers. This makes remote debugging a bit more
6334 efficient for those targets that provide critical registers as
6335 part of their normal status mechanism (as another roundtrip to
6336 fetch them is avoided). */
6337 VEC(cached_reg_t
) *regcache
;
6339 enum target_stop_reason stop_reason
;
6341 CORE_ADDR watch_data_address
;
6346 DECLARE_QUEUE_P (stop_reply_p
);
6347 DEFINE_QUEUE_P (stop_reply_p
);
6348 /* The list of already fetched and acknowledged stop events. This
6349 queue is used for notification Stop, and other notifications
6350 don't need queue for their events, because the notification events
6351 of Stop can't be consumed immediately, so that events should be
6352 queued first, and be consumed by remote_wait_{ns,as} one per
6353 time. Other notifications can consume their events immediately,
6354 so queue is not needed for them. */
6355 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6358 stop_reply_xfree (struct stop_reply
*r
)
6360 notif_event_xfree ((struct notif_event
*) r
);
6363 /* Return the length of the stop reply queue. */
6366 stop_reply_queue_length (void)
6368 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6372 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6373 struct notif_event
*event
)
6375 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6379 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6380 struct notif_event
*event
)
6382 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6385 putpkt (self
->ack_command
);
6387 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6388 /* We got an unknown stop reply. */
6389 error (_("Unknown stop reply"));
6391 push_stop_reply (stop_reply
);
6395 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6397 /* We can't get pending events in remote_notif_process for
6398 notification stop, and we have to do this in remote_wait_ns
6399 instead. If we fetch all queued events from stub, remote stub
6400 may exit and we have no chance to process them back in
6402 mark_async_event_handler (remote_async_inferior_event_token
);
6407 stop_reply_dtr (struct notif_event
*event
)
6409 struct stop_reply
*r
= (struct stop_reply
*) event
;
6411 VEC_free (cached_reg_t
, r
->regcache
);
6414 static struct notif_event
*
6415 remote_notif_stop_alloc_reply (void)
6417 /* We cast to a pointer to the "base class". */
6418 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6420 r
->dtr
= stop_reply_dtr
;
6425 /* A client of notification Stop. */
6427 struct notif_client notif_client_stop
=
6431 remote_notif_stop_parse
,
6432 remote_notif_stop_ack
,
6433 remote_notif_stop_can_get_pending_events
,
6434 remote_notif_stop_alloc_reply
,
6438 /* A parameter to pass data in and out. */
6440 struct queue_iter_param
6443 struct stop_reply
*output
;
6446 /* Determine if THREAD_PTID is a pending fork parent thread. ARG contains
6447 the pid of the process that owns the threads we want to check, or
6448 -1 if we want to check all threads. */
6451 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6454 if (ws
->kind
== TARGET_WAITKIND_FORKED
6455 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6457 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6464 /* Return the thread's pending status used to determine whether the
6465 thread is a fork parent stopped at a fork event. */
6467 static struct target_waitstatus
*
6468 thread_pending_fork_status (struct thread_info
*thread
)
6470 if (thread
->suspend
.waitstatus_pending_p
)
6471 return &thread
->suspend
.waitstatus
;
6473 return &thread
->pending_follow
;
6476 /* Determine if THREAD is a pending fork parent thread. */
6479 is_pending_fork_parent_thread (struct thread_info
*thread
)
6481 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6484 return is_pending_fork_parent (ws
, pid
, thread
->ptid
);
6487 /* Check whether EVENT is a fork event, and if it is, remove the
6488 fork child from the context list passed in DATA. */
6491 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6492 QUEUE_ITER (stop_reply_p
) *iter
,
6496 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6497 struct threads_listing_context
*context
6498 = (struct threads_listing_context
*) param
->input
;
6500 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6501 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6502 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6503 threads_listing_context_remove (&event
->ws
, context
);
6508 /* If CONTEXT contains any fork child threads that have not been
6509 reported yet, remove them from the CONTEXT list. If such a
6510 thread exists it is because we are stopped at a fork catchpoint
6511 and have not yet called follow_fork, which will set up the
6512 host-side data structures for the new process. */
6515 remove_new_fork_children (struct threads_listing_context
*context
)
6517 struct thread_info
* thread
;
6519 struct notif_client
*notif
= ¬if_client_stop
;
6520 struct queue_iter_param param
;
6522 /* For any threads stopped at a fork event, remove the corresponding
6523 fork child threads from the CONTEXT list. */
6524 ALL_NON_EXITED_THREADS (thread
)
6526 struct target_waitstatus
*ws
= thread_pending_fork_status (thread
);
6528 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6530 threads_listing_context_remove (ws
, context
);
6534 /* Check for any pending fork events (not reported or processed yet)
6535 in process PID and remove those fork child threads from the
6536 CONTEXT list as well. */
6537 remote_notif_get_pending_events (notif
);
6538 param
.input
= context
;
6539 param
.output
= NULL
;
6540 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6541 remove_child_of_pending_fork
, ¶m
);
6544 /* Check whether EVENT would prevent a global or process wildcard
6548 check_pending_event_prevents_wildcard_vcont_callback
6549 (QUEUE (stop_reply_p
) *q
,
6550 QUEUE_ITER (stop_reply_p
) *iter
,
6554 struct inferior
*inf
;
6555 int *may_global_wildcard_vcont
= (int *) data
;
6557 if (event
->ws
.kind
== TARGET_WAITKIND_NO_RESUMED
6558 || event
->ws
.kind
== TARGET_WAITKIND_NO_HISTORY
)
6561 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6562 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
)
6563 *may_global_wildcard_vcont
= 0;
6565 inf
= find_inferior_ptid (event
->ptid
);
6567 /* This may be the first time we heard about this process.
6568 Regardless, we must not do a global wildcard resume, otherwise
6569 we'd resume this process too. */
6570 *may_global_wildcard_vcont
= 0;
6572 inf
->priv
->may_wildcard_vcont
= 0;
6577 /* Check whether any event pending in the vStopped queue would prevent
6578 a global or process wildcard vCont action. Clear
6579 *may_global_wildcard if we can't do a global wildcard (vCont;c),
6580 and clear the event inferior's may_wildcard_vcont flag if we can't
6581 do a process-wide wildcard resume (vCont;c:pPID.-1). */
6584 check_pending_events_prevent_wildcard_vcont (int *may_global_wildcard
)
6586 struct notif_client
*notif
= ¬if_client_stop
;
6588 remote_notif_get_pending_events (notif
);
6589 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6590 check_pending_event_prevents_wildcard_vcont_callback
,
6591 may_global_wildcard
);
6594 /* Remove stop replies in the queue if its pid is equal to the given
6598 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6599 QUEUE_ITER (stop_reply_p
) *iter
,
6603 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6604 struct inferior
*inf
= (struct inferior
*) param
->input
;
6606 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6608 stop_reply_xfree (event
);
6609 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6615 /* Discard all pending stop replies of inferior INF. */
6618 discard_pending_stop_replies (struct inferior
*inf
)
6620 struct queue_iter_param param
;
6621 struct stop_reply
*reply
;
6622 struct remote_state
*rs
= get_remote_state ();
6623 struct remote_notif_state
*rns
= rs
->notif_state
;
6625 /* This function can be notified when an inferior exists. When the
6626 target is not remote, the notification state is NULL. */
6627 if (rs
->remote_desc
== NULL
)
6630 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6632 /* Discard the in-flight notification. */
6633 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6635 stop_reply_xfree (reply
);
6636 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6640 param
.output
= NULL
;
6641 /* Discard the stop replies we have already pulled with
6643 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6644 remove_stop_reply_for_inferior
, ¶m
);
6647 /* If its remote state is equal to the given remote state,
6648 remove EVENT from the stop reply queue. */
6651 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6652 QUEUE_ITER (stop_reply_p
) *iter
,
6656 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6657 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6659 if (event
->rs
== rs
)
6661 stop_reply_xfree (event
);
6662 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6668 /* Discard the stop replies for RS in stop_reply_queue. */
6671 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6673 struct queue_iter_param param
;
6676 param
.output
= NULL
;
6677 /* Discard the stop replies we have already pulled with
6679 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6680 remove_stop_reply_of_remote_state
, ¶m
);
6683 /* A parameter to pass data in and out. */
6686 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6687 QUEUE_ITER (stop_reply_p
) *iter
,
6691 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6692 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6694 if (ptid_match (event
->ptid
, *ptid
))
6696 param
->output
= event
;
6697 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6704 /* Remove the first reply in 'stop_reply_queue' which matches
6707 static struct stop_reply
*
6708 remote_notif_remove_queued_reply (ptid_t ptid
)
6710 struct queue_iter_param param
;
6712 param
.input
= &ptid
;
6713 param
.output
= NULL
;
6715 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6716 remote_notif_remove_once_on_match
, ¶m
);
6718 fprintf_unfiltered (gdb_stdlog
,
6719 "notif: discard queued event: 'Stop' in %s\n",
6720 target_pid_to_str (ptid
));
6722 return param
.output
;
6725 /* Look for a queued stop reply belonging to PTID. If one is found,
6726 remove it from the queue, and return it. Returns NULL if none is
6727 found. If there are still queued events left to process, tell the
6728 event loop to get back to target_wait soon. */
6730 static struct stop_reply
*
6731 queued_stop_reply (ptid_t ptid
)
6733 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6735 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6736 /* There's still at least an event left. */
6737 mark_async_event_handler (remote_async_inferior_event_token
);
6742 /* Push a fully parsed stop reply in the stop reply queue. Since we
6743 know that we now have at least one queued event left to pass to the
6744 core side, tell the event loop to get back to target_wait soon. */
6747 push_stop_reply (struct stop_reply
*new_event
)
6749 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6752 fprintf_unfiltered (gdb_stdlog
,
6753 "notif: push 'Stop' %s to queue %d\n",
6754 target_pid_to_str (new_event
->ptid
),
6755 QUEUE_length (stop_reply_p
,
6758 mark_async_event_handler (remote_async_inferior_event_token
);
6762 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6763 QUEUE_ITER (stop_reply_p
) *iter
,
6764 struct stop_reply
*event
,
6767 ptid_t
*ptid
= (ptid_t
*) data
;
6769 return !(ptid_equal (*ptid
, event
->ptid
)
6770 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6773 /* Returns true if we have a stop reply for PTID. */
6776 peek_stop_reply (ptid_t ptid
)
6778 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6779 stop_reply_match_ptid_and_ws
, &ptid
);
6782 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6783 starting with P and ending with PEND matches PREFIX. */
6786 strprefix (const char *p
, const char *pend
, const char *prefix
)
6788 for ( ; p
< pend
; p
++, prefix
++)
6791 return *prefix
== '\0';
6794 /* Parse the stop reply in BUF. Either the function succeeds, and the
6795 result is stored in EVENT, or throws an error. */
6798 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6800 struct remote_arch_state
*rsa
= get_remote_arch_state ();
6805 event
->ptid
= null_ptid
;
6806 event
->rs
= get_remote_state ();
6807 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6808 event
->ws
.value
.integer
= 0;
6809 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6810 event
->regcache
= NULL
;
6815 case 'T': /* Status with PC, SP, FP, ... */
6816 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6817 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6819 n... = register number
6820 r... = register contents
6823 p
= &buf
[3]; /* after Txx */
6829 p1
= strchr (p
, ':');
6831 error (_("Malformed packet(a) (missing colon): %s\n\
6835 error (_("Malformed packet(a) (missing register number): %s\n\
6839 /* Some "registers" are actually extended stop information.
6840 Note if you're adding a new entry here: GDB 7.9 and
6841 earlier assume that all register "numbers" that start
6842 with an hex digit are real register numbers. Make sure
6843 the server only sends such a packet if it knows the
6844 client understands it. */
6846 if (strprefix (p
, p1
, "thread"))
6847 event
->ptid
= read_ptid (++p1
, &p
);
6848 else if (strprefix (p
, p1
, "syscall_entry"))
6852 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6853 p
= unpack_varlen_hex (++p1
, &sysno
);
6854 event
->ws
.value
.syscall_number
= (int) sysno
;
6856 else if (strprefix (p
, p1
, "syscall_return"))
6860 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6861 p
= unpack_varlen_hex (++p1
, &sysno
);
6862 event
->ws
.value
.syscall_number
= (int) sysno
;
6864 else if (strprefix (p
, p1
, "watch")
6865 || strprefix (p
, p1
, "rwatch")
6866 || strprefix (p
, p1
, "awatch"))
6868 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6869 p
= unpack_varlen_hex (++p1
, &addr
);
6870 event
->watch_data_address
= (CORE_ADDR
) addr
;
6872 else if (strprefix (p
, p1
, "swbreak"))
6874 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6876 /* Make sure the stub doesn't forget to indicate support
6878 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6879 error (_("Unexpected swbreak stop reason"));
6881 /* The value part is documented as "must be empty",
6882 though we ignore it, in case we ever decide to make
6883 use of it in a backward compatible way. */
6884 p
= strchrnul (p1
+ 1, ';');
6886 else if (strprefix (p
, p1
, "hwbreak"))
6888 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6890 /* Make sure the stub doesn't forget to indicate support
6892 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6893 error (_("Unexpected hwbreak stop reason"));
6896 p
= strchrnul (p1
+ 1, ';');
6898 else if (strprefix (p
, p1
, "library"))
6900 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6901 p
= strchrnul (p1
+ 1, ';');
6903 else if (strprefix (p
, p1
, "replaylog"))
6905 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6906 /* p1 will indicate "begin" or "end", but it makes
6907 no difference for now, so ignore it. */
6908 p
= strchrnul (p1
+ 1, ';');
6910 else if (strprefix (p
, p1
, "core"))
6914 p
= unpack_varlen_hex (++p1
, &c
);
6917 else if (strprefix (p
, p1
, "fork"))
6919 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6920 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6922 else if (strprefix (p
, p1
, "vfork"))
6924 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6925 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6927 else if (strprefix (p
, p1
, "vforkdone"))
6929 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6930 p
= strchrnul (p1
+ 1, ';');
6932 else if (strprefix (p
, p1
, "exec"))
6935 char pathname
[PATH_MAX
];
6938 /* Determine the length of the execd pathname. */
6939 p
= unpack_varlen_hex (++p1
, &ignored
);
6940 pathlen
= (p
- p1
) / 2;
6942 /* Save the pathname for event reporting and for
6943 the next run command. */
6944 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6945 pathname
[pathlen
] = '\0';
6947 /* This is freed during event handling. */
6948 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6949 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6951 /* Skip the registers included in this packet, since
6952 they may be for an architecture different from the
6953 one used by the original program. */
6956 else if (strprefix (p
, p1
, "create"))
6958 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
6959 p
= strchrnul (p1
+ 1, ';');
6968 p
= strchrnul (p1
+ 1, ';');
6973 /* Maybe a real ``P'' register number. */
6974 p_temp
= unpack_varlen_hex (p
, &pnum
);
6975 /* If the first invalid character is the colon, we got a
6976 register number. Otherwise, it's an unknown stop
6980 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
6981 cached_reg_t cached_reg
;
6984 error (_("Remote sent bad register number %s: %s\n\
6986 hex_string (pnum
), p
, buf
);
6988 cached_reg
.num
= reg
->regnum
;
6991 fieldsize
= hex2bin (p
, cached_reg
.data
,
6992 register_size (target_gdbarch (),
6995 if (fieldsize
< register_size (target_gdbarch (),
6997 warning (_("Remote reply is too short: %s"), buf
);
6999 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
7003 /* Not a number. Silently skip unknown optional
7005 p
= strchrnul (p1
+ 1, ';');
7010 error (_("Remote register badly formatted: %s\nhere: %s"),
7015 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
7019 case 'S': /* Old style status, just signal only. */
7023 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
7024 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
7025 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
7026 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
7028 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7031 case 'w': /* Thread exited. */
7036 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
7037 p
= unpack_varlen_hex (&buf
[1], &value
);
7038 event
->ws
.value
.integer
= value
;
7040 error (_("stop reply packet badly formatted: %s"), buf
);
7041 event
->ptid
= read_ptid (++p
, NULL
);
7044 case 'W': /* Target exited. */
7051 /* GDB used to accept only 2 hex chars here. Stubs should
7052 only send more if they detect GDB supports multi-process
7054 p
= unpack_varlen_hex (&buf
[1], &value
);
7058 /* The remote process exited. */
7059 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
7060 event
->ws
.value
.integer
= value
;
7064 /* The remote process exited with a signal. */
7065 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
7066 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
7067 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
7069 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
7072 /* If no process is specified, assume inferior_ptid. */
7073 pid
= ptid_get_pid (inferior_ptid
);
7082 else if (startswith (p
, "process:"))
7086 p
+= sizeof ("process:") - 1;
7087 unpack_varlen_hex (p
, &upid
);
7091 error (_("unknown stop reply packet: %s"), buf
);
7094 error (_("unknown stop reply packet: %s"), buf
);
7095 event
->ptid
= pid_to_ptid (pid
);
7099 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
7100 event
->ptid
= minus_one_ptid
;
7104 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
7105 error (_("No process or thread specified in stop reply: %s"), buf
);
7108 /* When the stub wants to tell GDB about a new notification reply, it
7109 sends a notification (%Stop, for example). Those can come it at
7110 any time, hence, we have to make sure that any pending
7111 putpkt/getpkt sequence we're making is finished, before querying
7112 the stub for more events with the corresponding ack command
7113 (vStopped, for example). E.g., if we started a vStopped sequence
7114 immediately upon receiving the notification, something like this
7122 1.6) <-- (registers reply to step #1.3)
7124 Obviously, the reply in step #1.6 would be unexpected to a vStopped
7127 To solve this, whenever we parse a %Stop notification successfully,
7128 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
7129 doing whatever we were doing:
7135 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
7136 2.5) <-- (registers reply to step #2.3)
7138 Eventualy after step #2.5, we return to the event loop, which
7139 notices there's an event on the
7140 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
7141 associated callback --- the function below. At this point, we're
7142 always safe to start a vStopped sequence. :
7145 2.7) <-- T05 thread:2
7151 remote_notif_get_pending_events (struct notif_client
*nc
)
7153 struct remote_state
*rs
= get_remote_state ();
7155 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
7158 fprintf_unfiltered (gdb_stdlog
,
7159 "notif: process: '%s' ack pending event\n",
7163 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
7164 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
7168 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7169 if (strcmp (rs
->buf
, "OK") == 0)
7172 remote_notif_ack (nc
, rs
->buf
);
7178 fprintf_unfiltered (gdb_stdlog
,
7179 "notif: process: '%s' no pending reply\n",
7184 /* Called when it is decided that STOP_REPLY holds the info of the
7185 event that is to be returned to the core. This function always
7186 destroys STOP_REPLY. */
7189 process_stop_reply (struct stop_reply
*stop_reply
,
7190 struct target_waitstatus
*status
)
7194 *status
= stop_reply
->ws
;
7195 ptid
= stop_reply
->ptid
;
7197 /* If no thread/process was reported by the stub, assume the current
7199 if (ptid_equal (ptid
, null_ptid
))
7200 ptid
= inferior_ptid
;
7202 if (status
->kind
!= TARGET_WAITKIND_EXITED
7203 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
7204 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
7206 struct private_thread_info
*remote_thr
;
7208 /* Expedited registers. */
7209 if (stop_reply
->regcache
)
7211 struct regcache
*regcache
7212 = get_thread_arch_regcache (ptid
, target_gdbarch ());
7217 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
7219 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
7220 VEC_free (cached_reg_t
, stop_reply
->regcache
);
7223 remote_notice_new_inferior (ptid
, 0);
7224 remote_thr
= get_private_info_ptid (ptid
);
7225 remote_thr
->core
= stop_reply
->core
;
7226 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
7227 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
7228 remote_thr
->vcont_resumed
= 0;
7231 stop_reply_xfree (stop_reply
);
7235 /* The non-stop mode version of target_wait. */
7238 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7240 struct remote_state
*rs
= get_remote_state ();
7241 struct stop_reply
*stop_reply
;
7245 /* If in non-stop mode, get out of getpkt even if a
7246 notification is received. */
7248 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7249 0 /* forever */, &is_notif
);
7252 if (ret
!= -1 && !is_notif
)
7255 case 'E': /* Error of some sort. */
7256 /* We're out of sync with the target now. Did it continue
7257 or not? We can't tell which thread it was in non-stop,
7258 so just ignore this. */
7259 warning (_("Remote failure reply: %s"), rs
->buf
);
7261 case 'O': /* Console output. */
7262 remote_console_output (rs
->buf
+ 1);
7265 warning (_("Invalid remote reply: %s"), rs
->buf
);
7269 /* Acknowledge a pending stop reply that may have arrived in the
7271 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
7272 remote_notif_get_pending_events (¬if_client_stop
);
7274 /* If indeed we noticed a stop reply, we're done. */
7275 stop_reply
= queued_stop_reply (ptid
);
7276 if (stop_reply
!= NULL
)
7277 return process_stop_reply (stop_reply
, status
);
7279 /* Still no event. If we're just polling for an event, then
7280 return to the event loop. */
7281 if (options
& TARGET_WNOHANG
)
7283 status
->kind
= TARGET_WAITKIND_IGNORE
;
7284 return minus_one_ptid
;
7287 /* Otherwise do a blocking wait. */
7288 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7289 1 /* forever */, &is_notif
);
7293 /* Wait until the remote machine stops, then return, storing status in
7294 STATUS just as `wait' would. */
7297 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7299 struct remote_state
*rs
= get_remote_state ();
7300 ptid_t event_ptid
= null_ptid
;
7302 struct stop_reply
*stop_reply
;
7306 status
->kind
= TARGET_WAITKIND_IGNORE
;
7307 status
->value
.integer
= 0;
7309 stop_reply
= queued_stop_reply (ptid
);
7310 if (stop_reply
!= NULL
)
7311 return process_stop_reply (stop_reply
, status
);
7313 if (rs
->cached_wait_status
)
7314 /* Use the cached wait status, but only once. */
7315 rs
->cached_wait_status
= 0;
7320 int forever
= ((options
& TARGET_WNOHANG
) == 0
7321 && wait_forever_enabled_p
);
7323 if (!rs
->waiting_for_stop_reply
)
7325 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
7326 return minus_one_ptid
;
7329 /* FIXME: cagney/1999-09-27: If we're in async mode we should
7330 _never_ wait for ever -> test on target_is_async_p().
7331 However, before we do that we need to ensure that the caller
7332 knows how to take the target into/out of async mode. */
7333 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
7334 forever
, &is_notif
);
7336 /* GDB gets a notification. Return to core as this event is
7338 if (ret
!= -1 && is_notif
)
7339 return minus_one_ptid
;
7341 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
7342 return minus_one_ptid
;
7347 /* Assume that the target has acknowledged Ctrl-C unless we receive
7348 an 'F' or 'O' packet. */
7349 if (buf
[0] != 'F' && buf
[0] != 'O')
7350 rs
->ctrlc_pending_p
= 0;
7354 case 'E': /* Error of some sort. */
7355 /* We're out of sync with the target now. Did it continue or
7356 not? Not is more likely, so report a stop. */
7357 rs
->waiting_for_stop_reply
= 0;
7359 warning (_("Remote failure reply: %s"), buf
);
7360 status
->kind
= TARGET_WAITKIND_STOPPED
;
7361 status
->value
.sig
= GDB_SIGNAL_0
;
7363 case 'F': /* File-I/O request. */
7364 /* GDB may access the inferior memory while handling the File-I/O
7365 request, but we don't want GDB accessing memory while waiting
7366 for a stop reply. See the comments in putpkt_binary. Set
7367 waiting_for_stop_reply to 0 temporarily. */
7368 rs
->waiting_for_stop_reply
= 0;
7369 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7370 rs
->ctrlc_pending_p
= 0;
7371 /* GDB handled the File-I/O request, and the target is running
7372 again. Keep waiting for events. */
7373 rs
->waiting_for_stop_reply
= 1;
7375 case 'N': case 'T': case 'S': case 'X': case 'W':
7377 struct stop_reply
*stop_reply
;
7379 /* There is a stop reply to handle. */
7380 rs
->waiting_for_stop_reply
= 0;
7383 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7386 event_ptid
= process_stop_reply (stop_reply
, status
);
7389 case 'O': /* Console output. */
7390 remote_console_output (buf
+ 1);
7393 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7395 /* Zero length reply means that we tried 'S' or 'C' and the
7396 remote system doesn't support it. */
7397 target_terminal_ours_for_output ();
7399 ("Can't send signals to this remote system. %s not sent.\n",
7400 gdb_signal_to_name (rs
->last_sent_signal
));
7401 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7402 target_terminal_inferior ();
7404 strcpy (buf
, rs
->last_sent_step
? "s" : "c");
7408 /* else fallthrough */
7410 warning (_("Invalid remote reply: %s"), buf
);
7414 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7415 return minus_one_ptid
;
7416 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7418 /* Nothing interesting happened. If we're doing a non-blocking
7419 poll, we're done. Otherwise, go back to waiting. */
7420 if (options
& TARGET_WNOHANG
)
7421 return minus_one_ptid
;
7425 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7426 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7428 if (!ptid_equal (event_ptid
, null_ptid
))
7429 record_currthread (rs
, event_ptid
);
7431 event_ptid
= inferior_ptid
;
7434 /* A process exit. Invalidate our notion of current thread. */
7435 record_currthread (rs
, minus_one_ptid
);
7440 /* Wait until the remote machine stops, then return, storing status in
7441 STATUS just as `wait' would. */
7444 remote_wait (struct target_ops
*ops
,
7445 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7449 if (target_is_non_stop_p ())
7450 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7452 event_ptid
= remote_wait_as (ptid
, status
, options
);
7454 if (target_is_async_p ())
7456 /* If there are are events left in the queue tell the event loop
7458 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7459 mark_async_event_handler (remote_async_inferior_event_token
);
7465 /* Fetch a single register using a 'p' packet. */
7468 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7470 struct remote_state
*rs
= get_remote_state ();
7472 char regp
[MAX_REGISTER_SIZE
];
7475 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7478 if (reg
->pnum
== -1)
7483 p
+= hexnumstr (p
, reg
->pnum
);
7486 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7490 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7494 case PACKET_UNKNOWN
:
7497 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7498 gdbarch_register_name (get_regcache_arch (regcache
),
7503 /* If this register is unfetchable, tell the regcache. */
7506 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7510 /* Otherwise, parse and supply the value. */
7516 error (_("fetch_register_using_p: early buf termination"));
7518 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7521 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7525 /* Fetch the registers included in the target's 'g' packet. */
7528 send_g_packet (void)
7530 struct remote_state
*rs
= get_remote_state ();
7533 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7534 remote_send (&rs
->buf
, &rs
->buf_size
);
7536 /* We can get out of synch in various cases. If the first character
7537 in the buffer is not a hex character, assume that has happened
7538 and try to fetch another packet to read. */
7539 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7540 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7541 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7542 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7545 fprintf_unfiltered (gdb_stdlog
,
7546 "Bad register packet; fetching a new packet\n");
7547 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7550 buf_len
= strlen (rs
->buf
);
7552 /* Sanity check the received packet. */
7553 if (buf_len
% 2 != 0)
7554 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7560 process_g_packet (struct regcache
*regcache
)
7562 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
7563 struct remote_state
*rs
= get_remote_state ();
7564 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7569 buf_len
= strlen (rs
->buf
);
7571 /* Further sanity checks, with knowledge of the architecture. */
7572 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7573 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
7575 /* Save the size of the packet sent to us by the target. It is used
7576 as a heuristic when determining the max size of packets that the
7577 target can safely receive. */
7578 if (rsa
->actual_register_packet_size
== 0)
7579 rsa
->actual_register_packet_size
= buf_len
;
7581 /* If this is smaller than we guessed the 'g' packet would be,
7582 update our records. A 'g' reply that doesn't include a register's
7583 value implies either that the register is not available, or that
7584 the 'p' packet must be used. */
7585 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7587 long sizeof_g_packet
= buf_len
/ 2;
7589 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7591 long offset
= rsa
->regs
[i
].offset
;
7592 long reg_size
= register_size (gdbarch
, i
);
7594 if (rsa
->regs
[i
].pnum
== -1)
7597 if (offset
>= sizeof_g_packet
)
7598 rsa
->regs
[i
].in_g_packet
= 0;
7599 else if (offset
+ reg_size
> sizeof_g_packet
)
7600 error (_("Truncated register %d in remote 'g' packet"), i
);
7602 rsa
->regs
[i
].in_g_packet
= 1;
7605 /* Looks valid enough, we can assume this is the correct length
7606 for a 'g' packet. It's important not to adjust
7607 rsa->sizeof_g_packet if we have truncated registers otherwise
7608 this "if" won't be run the next time the method is called
7609 with a packet of the same size and one of the internal errors
7610 below will trigger instead. */
7611 rsa
->sizeof_g_packet
= sizeof_g_packet
;
7614 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7616 /* Unimplemented registers read as all bits zero. */
7617 memset (regs
, 0, rsa
->sizeof_g_packet
);
7619 /* Reply describes registers byte by byte, each byte encoded as two
7620 hex characters. Suck them all up, then supply them to the
7621 register cacheing/storage mechanism. */
7624 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7626 if (p
[0] == 0 || p
[1] == 0)
7627 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7628 internal_error (__FILE__
, __LINE__
,
7629 _("unexpected end of 'g' packet reply"));
7631 if (p
[0] == 'x' && p
[1] == 'x')
7632 regs
[i
] = 0; /* 'x' */
7634 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7638 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7640 struct packet_reg
*r
= &rsa
->regs
[i
];
7641 long reg_size
= register_size (gdbarch
, i
);
7645 if ((r
->offset
+ reg_size
) * 2 > strlen (rs
->buf
))
7646 /* This shouldn't happen - we adjusted in_g_packet above. */
7647 internal_error (__FILE__
, __LINE__
,
7648 _("unexpected end of 'g' packet reply"));
7649 else if (rs
->buf
[r
->offset
* 2] == 'x')
7651 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7652 /* The register isn't available, mark it as such (at
7653 the same time setting the value to zero). */
7654 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7657 regcache_raw_supply (regcache
, r
->regnum
,
7664 fetch_registers_using_g (struct regcache
*regcache
)
7667 process_g_packet (regcache
);
7670 /* Make the remote selected traceframe match GDB's selected
7674 set_remote_traceframe (void)
7677 struct remote_state
*rs
= get_remote_state ();
7679 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7682 /* Avoid recursion, remote_trace_find calls us again. */
7683 rs
->remote_traceframe_number
= get_traceframe_number ();
7685 newnum
= target_trace_find (tfind_number
,
7686 get_traceframe_number (), 0, 0, NULL
);
7688 /* Should not happen. If it does, all bets are off. */
7689 if (newnum
!= get_traceframe_number ())
7690 warning (_("could not set remote traceframe"));
7694 remote_fetch_registers (struct target_ops
*ops
,
7695 struct regcache
*regcache
, int regnum
)
7697 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7700 set_remote_traceframe ();
7701 set_general_thread (inferior_ptid
);
7705 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
7707 gdb_assert (reg
!= NULL
);
7709 /* If this register might be in the 'g' packet, try that first -
7710 we are likely to read more than one register. If this is the
7711 first 'g' packet, we might be overly optimistic about its
7712 contents, so fall back to 'p'. */
7713 if (reg
->in_g_packet
)
7715 fetch_registers_using_g (regcache
);
7716 if (reg
->in_g_packet
)
7720 if (fetch_register_using_p (regcache
, reg
))
7723 /* This register is not available. */
7724 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7729 fetch_registers_using_g (regcache
);
7731 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7732 if (!rsa
->regs
[i
].in_g_packet
)
7733 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7735 /* This register is not available. */
7736 regcache_raw_supply (regcache
, i
, NULL
);
7740 /* Prepare to store registers. Since we may send them all (using a
7741 'G' request), we have to read out the ones we don't want to change
7745 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7747 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7749 gdb_byte buf
[MAX_REGISTER_SIZE
];
7751 /* Make sure the entire registers array is valid. */
7752 switch (packet_support (PACKET_P
))
7754 case PACKET_DISABLE
:
7755 case PACKET_SUPPORT_UNKNOWN
:
7756 /* Make sure all the necessary registers are cached. */
7757 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7758 if (rsa
->regs
[i
].in_g_packet
)
7759 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
7766 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7767 packet was not recognized. */
7770 store_register_using_P (const struct regcache
*regcache
,
7771 struct packet_reg
*reg
)
7773 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
7774 struct remote_state
*rs
= get_remote_state ();
7775 /* Try storing a single register. */
7776 char *buf
= rs
->buf
;
7777 gdb_byte regp
[MAX_REGISTER_SIZE
];
7780 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7783 if (reg
->pnum
== -1)
7786 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7787 p
= buf
+ strlen (buf
);
7788 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7789 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7791 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7793 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7798 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7799 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7800 case PACKET_UNKNOWN
:
7803 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7807 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7808 contents of the register cache buffer. FIXME: ignores errors. */
7811 store_registers_using_G (const struct regcache
*regcache
)
7813 struct remote_state
*rs
= get_remote_state ();
7814 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7818 /* Extract all the registers in the regcache copying them into a
7823 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7824 memset (regs
, 0, rsa
->sizeof_g_packet
);
7825 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7827 struct packet_reg
*r
= &rsa
->regs
[i
];
7830 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7834 /* Command describes registers byte by byte,
7835 each byte encoded as two hex characters. */
7838 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
7840 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7842 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7843 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7844 error (_("Could not write registers; remote failure reply '%s'"),
7848 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7849 of the register cache buffer. FIXME: ignores errors. */
7852 remote_store_registers (struct target_ops
*ops
,
7853 struct regcache
*regcache
, int regnum
)
7855 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7858 set_remote_traceframe ();
7859 set_general_thread (inferior_ptid
);
7863 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
7865 gdb_assert (reg
!= NULL
);
7867 /* Always prefer to store registers using the 'P' packet if
7868 possible; we often change only a small number of registers.
7869 Sometimes we change a larger number; we'd need help from a
7870 higher layer to know to use 'G'. */
7871 if (store_register_using_P (regcache
, reg
))
7874 /* For now, don't complain if we have no way to write the
7875 register. GDB loses track of unavailable registers too
7876 easily. Some day, this may be an error. We don't have
7877 any way to read the register, either... */
7878 if (!reg
->in_g_packet
)
7881 store_registers_using_G (regcache
);
7885 store_registers_using_G (regcache
);
7887 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7888 if (!rsa
->regs
[i
].in_g_packet
)
7889 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7890 /* See above for why we do not issue an error here. */
7895 /* Return the number of hex digits in num. */
7898 hexnumlen (ULONGEST num
)
7902 for (i
= 0; num
!= 0; i
++)
7905 return std::max (i
, 1);
7908 /* Set BUF to the minimum number of hex digits representing NUM. */
7911 hexnumstr (char *buf
, ULONGEST num
)
7913 int len
= hexnumlen (num
);
7915 return hexnumnstr (buf
, num
, len
);
7919 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7922 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7928 for (i
= width
- 1; i
>= 0; i
--)
7930 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7937 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7940 remote_address_masked (CORE_ADDR addr
)
7942 unsigned int address_size
= remote_address_size
;
7944 /* If "remoteaddresssize" was not set, default to target address size. */
7946 address_size
= gdbarch_addr_bit (target_gdbarch ());
7948 if (address_size
> 0
7949 && address_size
< (sizeof (ULONGEST
) * 8))
7951 /* Only create a mask when that mask can safely be constructed
7952 in a ULONGEST variable. */
7955 mask
= (mask
<< address_size
) - 1;
7961 /* Determine whether the remote target supports binary downloading.
7962 This is accomplished by sending a no-op memory write of zero length
7963 to the target at the specified address. It does not suffice to send
7964 the whole packet, since many stubs strip the eighth bit and
7965 subsequently compute a wrong checksum, which causes real havoc with
7968 NOTE: This can still lose if the serial line is not eight-bit
7969 clean. In cases like this, the user should clear "remote
7973 check_binary_download (CORE_ADDR addr
)
7975 struct remote_state
*rs
= get_remote_state ();
7977 switch (packet_support (PACKET_X
))
7979 case PACKET_DISABLE
:
7983 case PACKET_SUPPORT_UNKNOWN
:
7989 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7991 p
+= hexnumstr (p
, (ULONGEST
) 0);
7995 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7996 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7998 if (rs
->buf
[0] == '\0')
8001 fprintf_unfiltered (gdb_stdlog
,
8002 "binary downloading NOT "
8003 "supported by target\n");
8004 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
8009 fprintf_unfiltered (gdb_stdlog
,
8010 "binary downloading supported by target\n");
8011 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
8018 /* Helper function to resize the payload in order to try to get a good
8019 alignment. We try to write an amount of data such that the next write will
8020 start on an address aligned on REMOTE_ALIGN_WRITES. */
8023 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
8025 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
8028 /* Write memory data directly to the remote machine.
8029 This does not inform the data cache; the data cache uses this.
8030 HEADER is the starting part of the packet.
8031 MEMADDR is the address in the remote memory space.
8032 MYADDR is the address of the buffer in our space.
8033 LEN_UNITS is the number of addressable units to write.
8034 UNIT_SIZE is the length in bytes of an addressable unit.
8035 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
8036 should send data as binary ('X'), or hex-encoded ('M').
8038 The function creates packet of the form
8039 <HEADER><ADDRESS>,<LENGTH>:<DATA>
8041 where encoding of <DATA> is terminated by PACKET_FORMAT.
8043 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
8046 Return the transferred status, error or OK (an
8047 'enum target_xfer_status' value). Save the number of addressable units
8048 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
8050 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
8051 exchange between gdb and the stub could look like (?? in place of the
8057 -> $M1000,3:eeeeffffeeee#??
8061 <- eeeeffffeeeedddd */
8063 static enum target_xfer_status
8064 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
8065 const gdb_byte
*myaddr
, ULONGEST len_units
,
8066 int unit_size
, ULONGEST
*xfered_len_units
,
8067 char packet_format
, int use_length
)
8069 struct remote_state
*rs
= get_remote_state ();
8075 int payload_capacity_bytes
;
8076 int payload_length_bytes
;
8078 if (packet_format
!= 'X' && packet_format
!= 'M')
8079 internal_error (__FILE__
, __LINE__
,
8080 _("remote_write_bytes_aux: bad packet format"));
8083 return TARGET_XFER_EOF
;
8085 payload_capacity_bytes
= get_memory_write_packet_size ();
8087 /* The packet buffer will be large enough for the payload;
8088 get_memory_packet_size ensures this. */
8091 /* Compute the size of the actual payload by subtracting out the
8092 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
8094 payload_capacity_bytes
-= strlen ("$,:#NN");
8096 /* The comma won't be used. */
8097 payload_capacity_bytes
+= 1;
8098 payload_capacity_bytes
-= strlen (header
);
8099 payload_capacity_bytes
-= hexnumlen (memaddr
);
8101 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
8103 strcat (rs
->buf
, header
);
8104 p
= rs
->buf
+ strlen (header
);
8106 /* Compute a best guess of the number of bytes actually transfered. */
8107 if (packet_format
== 'X')
8109 /* Best guess at number of bytes that will fit. */
8110 todo_units
= std::min (len_units
,
8111 (ULONGEST
) payload_capacity_bytes
/ unit_size
);
8113 payload_capacity_bytes
-= hexnumlen (todo_units
);
8114 todo_units
= std::min (todo_units
, payload_capacity_bytes
/ unit_size
);
8118 /* Number of bytes that will fit. */
8120 = std::min (len_units
,
8121 (ULONGEST
) (payload_capacity_bytes
/ unit_size
) / 2);
8123 payload_capacity_bytes
-= hexnumlen (todo_units
);
8124 todo_units
= std::min (todo_units
,
8125 (payload_capacity_bytes
/ unit_size
) / 2);
8128 if (todo_units
<= 0)
8129 internal_error (__FILE__
, __LINE__
,
8130 _("minimum packet size too small to write data"));
8132 /* If we already need another packet, then try to align the end
8133 of this packet to a useful boundary. */
8134 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
8135 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
8137 /* Append "<memaddr>". */
8138 memaddr
= remote_address_masked (memaddr
);
8139 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8146 /* Append the length and retain its location and size. It may need to be
8147 adjusted once the packet body has been created. */
8149 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
8157 /* Append the packet body. */
8158 if (packet_format
== 'X')
8160 /* Binary mode. Send target system values byte by byte, in
8161 increasing byte addresses. Only escape certain critical
8163 payload_length_bytes
=
8164 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
8165 &units_written
, payload_capacity_bytes
);
8167 /* If not all TODO units fit, then we'll need another packet. Make
8168 a second try to keep the end of the packet aligned. Don't do
8169 this if the packet is tiny. */
8170 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
8174 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
8176 if (new_todo_units
!= units_written
)
8177 payload_length_bytes
=
8178 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
8179 (gdb_byte
*) p
, &units_written
,
8180 payload_capacity_bytes
);
8183 p
+= payload_length_bytes
;
8184 if (use_length
&& units_written
< todo_units
)
8186 /* Escape chars have filled up the buffer prematurely,
8187 and we have actually sent fewer units than planned.
8188 Fix-up the length field of the packet. Use the same
8189 number of characters as before. */
8190 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
8192 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
8197 /* Normal mode: Send target system values byte by byte, in
8198 increasing byte addresses. Each byte is encoded as a two hex
8200 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
8201 units_written
= todo_units
;
8204 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
8205 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8207 if (rs
->buf
[0] == 'E')
8208 return TARGET_XFER_E_IO
;
8210 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
8211 send fewer units than we'd planned. */
8212 *xfered_len_units
= (ULONGEST
) units_written
;
8213 return TARGET_XFER_OK
;
8216 /* Write memory data directly to the remote machine.
8217 This does not inform the data cache; the data cache uses this.
8218 MEMADDR is the address in the remote memory space.
8219 MYADDR is the address of the buffer in our space.
8220 LEN is the number of bytes.
8222 Return the transferred status, error or OK (an
8223 'enum target_xfer_status' value). Save the number of bytes
8224 transferred in *XFERED_LEN. Only transfer a single packet. */
8226 static enum target_xfer_status
8227 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
8228 int unit_size
, ULONGEST
*xfered_len
)
8230 char *packet_format
= 0;
8232 /* Check whether the target supports binary download. */
8233 check_binary_download (memaddr
);
8235 switch (packet_support (PACKET_X
))
8238 packet_format
= "X";
8240 case PACKET_DISABLE
:
8241 packet_format
= "M";
8243 case PACKET_SUPPORT_UNKNOWN
:
8244 internal_error (__FILE__
, __LINE__
,
8245 _("remote_write_bytes: bad internal state"));
8247 internal_error (__FILE__
, __LINE__
, _("bad switch"));
8250 return remote_write_bytes_aux (packet_format
,
8251 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
8252 packet_format
[0], 1);
8255 /* Read memory data directly from the remote machine.
8256 This does not use the data cache; the data cache uses this.
8257 MEMADDR is the address in the remote memory space.
8258 MYADDR is the address of the buffer in our space.
8259 LEN_UNITS is the number of addressable memory units to read..
8260 UNIT_SIZE is the length in bytes of an addressable unit.
8262 Return the transferred status, error or OK (an
8263 'enum target_xfer_status' value). Save the number of bytes
8264 transferred in *XFERED_LEN_UNITS.
8266 See the comment of remote_write_bytes_aux for an example of
8267 memory read/write exchange between gdb and the stub. */
8269 static enum target_xfer_status
8270 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
8271 int unit_size
, ULONGEST
*xfered_len_units
)
8273 struct remote_state
*rs
= get_remote_state ();
8274 int buf_size_bytes
; /* Max size of packet output buffer. */
8279 buf_size_bytes
= get_memory_read_packet_size ();
8280 /* The packet buffer will be large enough for the payload;
8281 get_memory_packet_size ensures this. */
8283 /* Number of units that will fit. */
8284 todo_units
= std::min (len_units
,
8285 (ULONGEST
) (buf_size_bytes
/ unit_size
) / 2);
8287 /* Construct "m"<memaddr>","<len>". */
8288 memaddr
= remote_address_masked (memaddr
);
8291 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
8293 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
8296 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8297 if (rs
->buf
[0] == 'E'
8298 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
8299 && rs
->buf
[3] == '\0')
8300 return TARGET_XFER_E_IO
;
8301 /* Reply describes memory byte by byte, each byte encoded as two hex
8304 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
8305 /* Return what we have. Let higher layers handle partial reads. */
8306 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
8307 return TARGET_XFER_OK
;
8310 /* Using the set of read-only target sections of remote, read live
8313 For interface/parameters/return description see target.h,
8316 static enum target_xfer_status
8317 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
8318 ULONGEST memaddr
, ULONGEST len
,
8319 int unit_size
, ULONGEST
*xfered_len
)
8321 struct target_section
*secp
;
8322 struct target_section_table
*table
;
8324 secp
= target_section_by_addr (ops
, memaddr
);
8326 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
8327 secp
->the_bfd_section
)
8330 struct target_section
*p
;
8331 ULONGEST memend
= memaddr
+ len
;
8333 table
= target_get_section_table (ops
);
8335 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
8337 if (memaddr
>= p
->addr
)
8339 if (memend
<= p
->endaddr
)
8341 /* Entire transfer is within this section. */
8342 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8345 else if (memaddr
>= p
->endaddr
)
8347 /* This section ends before the transfer starts. */
8352 /* This section overlaps the transfer. Just do half. */
8353 len
= p
->endaddr
- memaddr
;
8354 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
8361 return TARGET_XFER_EOF
;
8364 /* Similar to remote_read_bytes_1, but it reads from the remote stub
8365 first if the requested memory is unavailable in traceframe.
8366 Otherwise, fall back to remote_read_bytes_1. */
8368 static enum target_xfer_status
8369 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
8370 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
8371 ULONGEST
*xfered_len
)
8374 return TARGET_XFER_EOF
;
8376 if (get_traceframe_number () != -1)
8378 VEC(mem_range_s
) *available
;
8380 /* If we fail to get the set of available memory, then the
8381 target does not support querying traceframe info, and so we
8382 attempt reading from the traceframe anyway (assuming the
8383 target implements the old QTro packet then). */
8384 if (traceframe_available_memory (&available
, memaddr
, len
))
8386 struct cleanup
*old_chain
;
8388 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
8390 if (VEC_empty (mem_range_s
, available
)
8391 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
8393 enum target_xfer_status res
;
8395 /* Don't read into the traceframe's available
8397 if (!VEC_empty (mem_range_s
, available
))
8399 LONGEST oldlen
= len
;
8401 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
8402 gdb_assert (len
<= oldlen
);
8405 do_cleanups (old_chain
);
8407 /* This goes through the topmost target again. */
8408 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8409 len
, unit_size
, xfered_len
);
8410 if (res
== TARGET_XFER_OK
)
8411 return TARGET_XFER_OK
;
8414 /* No use trying further, we know some memory starting
8415 at MEMADDR isn't available. */
8417 return TARGET_XFER_UNAVAILABLE
;
8421 /* Don't try to read more than how much is available, in
8422 case the target implements the deprecated QTro packet to
8423 cater for older GDBs (the target's knowledge of read-only
8424 sections may be outdated by now). */
8425 len
= VEC_index (mem_range_s
, available
, 0)->length
;
8427 do_cleanups (old_chain
);
8431 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8436 /* Sends a packet with content determined by the printf format string
8437 FORMAT and the remaining arguments, then gets the reply. Returns
8438 whether the packet was a success, a failure, or unknown. */
8440 static enum packet_result
remote_send_printf (const char *format
, ...)
8441 ATTRIBUTE_PRINTF (1, 2);
8443 static enum packet_result
8444 remote_send_printf (const char *format
, ...)
8446 struct remote_state
*rs
= get_remote_state ();
8447 int max_size
= get_remote_packet_size ();
8450 va_start (ap
, format
);
8453 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8454 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8456 if (putpkt (rs
->buf
) < 0)
8457 error (_("Communication problem with target."));
8460 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8462 return packet_check_result (rs
->buf
);
8466 restore_remote_timeout (void *p
)
8468 int value
= *(int *)p
;
8470 remote_timeout
= value
;
8473 /* Flash writing can take quite some time. We'll set
8474 effectively infinite timeout for flash operations.
8475 In future, we'll need to decide on a better approach. */
8476 static const int remote_flash_timeout
= 1000;
8479 remote_flash_erase (struct target_ops
*ops
,
8480 ULONGEST address
, LONGEST length
)
8482 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8483 int saved_remote_timeout
= remote_timeout
;
8484 enum packet_result ret
;
8485 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
8486 &saved_remote_timeout
);
8488 remote_timeout
= remote_flash_timeout
;
8490 ret
= remote_send_printf ("vFlashErase:%s,%s",
8491 phex (address
, addr_size
),
8495 case PACKET_UNKNOWN
:
8496 error (_("Remote target does not support flash erase"));
8498 error (_("Error erasing flash with vFlashErase packet"));
8503 do_cleanups (back_to
);
8506 static enum target_xfer_status
8507 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8508 ULONGEST length
, ULONGEST
*xfered_len
,
8509 const gdb_byte
*data
)
8511 int saved_remote_timeout
= remote_timeout
;
8512 enum target_xfer_status ret
;
8513 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
8514 &saved_remote_timeout
);
8516 remote_timeout
= remote_flash_timeout
;
8517 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8519 do_cleanups (back_to
);
8525 remote_flash_done (struct target_ops
*ops
)
8527 int saved_remote_timeout
= remote_timeout
;
8529 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
8530 &saved_remote_timeout
);
8532 remote_timeout
= remote_flash_timeout
;
8533 ret
= remote_send_printf ("vFlashDone");
8534 do_cleanups (back_to
);
8538 case PACKET_UNKNOWN
:
8539 error (_("Remote target does not support vFlashDone"));
8541 error (_("Error finishing flash operation"));
8548 remote_files_info (struct target_ops
*ignore
)
8550 puts_filtered ("Debugging a target over a serial line.\n");
8553 /* Stuff for dealing with the packets which are part of this protocol.
8554 See comment at top of file for details. */
8556 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8557 error to higher layers. Called when a serial error is detected.
8558 The exception message is STRING, followed by a colon and a blank,
8559 the system error message for errno at function entry and final dot
8560 for output compatibility with throw_perror_with_name. */
8563 unpush_and_perror (const char *string
)
8565 int saved_errno
= errno
;
8567 remote_unpush_target ();
8568 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8569 safe_strerror (saved_errno
));
8572 /* Read a single character from the remote end. The current quit
8573 handler is overridden to avoid quitting in the middle of packet
8574 sequence, as that would break communication with the remote server.
8575 See remote_serial_quit_handler for more detail. */
8578 readchar (int timeout
)
8581 struct remote_state
*rs
= get_remote_state ();
8582 struct cleanup
*old_chain
;
8584 old_chain
= make_cleanup_override_quit_handler (remote_serial_quit_handler
);
8586 rs
->got_ctrlc_during_io
= 0;
8588 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8590 if (rs
->got_ctrlc_during_io
)
8593 do_cleanups (old_chain
);
8598 switch ((enum serial_rc
) ch
)
8601 remote_unpush_target ();
8602 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8605 unpush_and_perror (_("Remote communication error. "
8606 "Target disconnected."));
8608 case SERIAL_TIMEOUT
:
8614 /* Wrapper for serial_write that closes the target and throws if
8615 writing fails. The current quit handler is overridden to avoid
8616 quitting in the middle of packet sequence, as that would break
8617 communication with the remote server. See
8618 remote_serial_quit_handler for more detail. */
8621 remote_serial_write (const char *str
, int len
)
8623 struct remote_state
*rs
= get_remote_state ();
8624 struct cleanup
*old_chain
;
8626 old_chain
= make_cleanup_override_quit_handler (remote_serial_quit_handler
);
8628 rs
->got_ctrlc_during_io
= 0;
8630 if (serial_write (rs
->remote_desc
, str
, len
))
8632 unpush_and_perror (_("Remote communication error. "
8633 "Target disconnected."));
8636 if (rs
->got_ctrlc_during_io
)
8639 do_cleanups (old_chain
);
8642 /* Send the command in *BUF to the remote machine, and read the reply
8643 into *BUF. Report an error if we get an error reply. Resize
8644 *BUF using xrealloc if necessary to hold the result, and update
8648 remote_send (char **buf
,
8652 getpkt (buf
, sizeof_buf
, 0);
8654 if ((*buf
)[0] == 'E')
8655 error (_("Remote failure reply: %s"), *buf
);
8658 /* Return a string representing an escaped version of BUF, of len N.
8659 E.g. \n is converted to \\n, \t to \\t, etc. */
8662 escape_buffer (const char *buf
, int n
)
8664 struct cleanup
*old_chain
;
8665 struct ui_file
*stb
;
8667 stb
= mem_fileopen ();
8668 old_chain
= make_cleanup_ui_file_delete (stb
);
8670 fputstrn_unfiltered (buf
, n
, '\\', stb
);
8671 std::string str
= ui_file_as_string (stb
);
8672 do_cleanups (old_chain
);
8676 /* Display a null-terminated packet on stdout, for debugging, using C
8680 print_packet (const char *buf
)
8682 puts_filtered ("\"");
8683 fputstr_filtered (buf
, '"', gdb_stdout
);
8684 puts_filtered ("\"");
8688 putpkt (const char *buf
)
8690 return putpkt_binary (buf
, strlen (buf
));
8693 /* Send a packet to the remote machine, with error checking. The data
8694 of the packet is in BUF. The string in BUF can be at most
8695 get_remote_packet_size () - 5 to account for the $, # and checksum,
8696 and for a possible /0 if we are debugging (remote_debug) and want
8697 to print the sent packet as a string. */
8700 putpkt_binary (const char *buf
, int cnt
)
8702 struct remote_state
*rs
= get_remote_state ();
8704 unsigned char csum
= 0;
8705 char *buf2
= (char *) xmalloc (cnt
+ 6);
8706 struct cleanup
*old_chain
= make_cleanup (xfree
, buf2
);
8712 /* Catch cases like trying to read memory or listing threads while
8713 we're waiting for a stop reply. The remote server wouldn't be
8714 ready to handle this request, so we'd hang and timeout. We don't
8715 have to worry about this in synchronous mode, because in that
8716 case it's not possible to issue a command while the target is
8717 running. This is not a problem in non-stop mode, because in that
8718 case, the stub is always ready to process serial input. */
8719 if (!target_is_non_stop_p ()
8720 && target_is_async_p ()
8721 && rs
->waiting_for_stop_reply
)
8723 error (_("Cannot execute this command while the target is running.\n"
8724 "Use the \"interrupt\" command to stop the target\n"
8725 "and then try again."));
8728 /* We're sending out a new packet. Make sure we don't look at a
8729 stale cached response. */
8730 rs
->cached_wait_status
= 0;
8732 /* Copy the packet into buffer BUF2, encapsulating it
8733 and giving it a checksum. */
8738 for (i
= 0; i
< cnt
; i
++)
8744 *p
++ = tohex ((csum
>> 4) & 0xf);
8745 *p
++ = tohex (csum
& 0xf);
8747 /* Send it over and over until we get a positive ack. */
8751 int started_error_output
= 0;
8757 int len
= (int) (p
- buf2
);
8760 = escape_buffer (buf2
, std::min (len
, REMOTE_DEBUG_MAX_CHAR
));
8762 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s", str
.c_str ());
8764 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
8766 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
8767 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
8770 fprintf_unfiltered (gdb_stdlog
, "...");
8772 gdb_flush (gdb_stdlog
);
8774 remote_serial_write (buf2
, p
- buf2
);
8776 /* If this is a no acks version of the remote protocol, send the
8777 packet and move on. */
8781 /* Read until either a timeout occurs (-2) or '+' is read.
8782 Handle any notification that arrives in the mean time. */
8785 ch
= readchar (remote_timeout
);
8793 case SERIAL_TIMEOUT
:
8796 if (started_error_output
)
8798 putchar_unfiltered ('\n');
8799 started_error_output
= 0;
8808 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8809 do_cleanups (old_chain
);
8813 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8815 case SERIAL_TIMEOUT
:
8819 do_cleanups (old_chain
);
8822 break; /* Retransmit buffer. */
8826 fprintf_unfiltered (gdb_stdlog
,
8827 "Packet instead of Ack, ignoring it\n");
8828 /* It's probably an old response sent because an ACK
8829 was lost. Gobble up the packet and ack it so it
8830 doesn't get retransmitted when we resend this
8833 remote_serial_write ("+", 1);
8834 continue; /* Now, go look for +. */
8841 /* If we got a notification, handle it, and go back to looking
8843 /* We've found the start of a notification. Now
8844 collect the data. */
8845 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8850 std::string str
= escape_buffer (rs
->buf
, val
);
8852 fprintf_unfiltered (gdb_stdlog
,
8853 " Notification received: %s\n",
8856 handle_notification (rs
->notif_state
, rs
->buf
);
8857 /* We're in sync now, rewait for the ack. */
8864 if (!started_error_output
)
8866 started_error_output
= 1;
8867 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8869 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8870 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8879 if (!started_error_output
)
8881 started_error_output
= 1;
8882 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8884 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8888 break; /* Here to retransmit. */
8892 /* This is wrong. If doing a long backtrace, the user should be
8893 able to get out next time we call QUIT, without anything as
8894 violent as interrupt_query. If we want to provide a way out of
8895 here without getting to the next QUIT, it should be based on
8896 hitting ^C twice as in remote_wait. */
8905 do_cleanups (old_chain
);
8909 /* Come here after finding the start of a frame when we expected an
8910 ack. Do our best to discard the rest of this packet. */
8919 c
= readchar (remote_timeout
);
8922 case SERIAL_TIMEOUT
:
8923 /* Nothing we can do. */
8926 /* Discard the two bytes of checksum and stop. */
8927 c
= readchar (remote_timeout
);
8929 c
= readchar (remote_timeout
);
8932 case '*': /* Run length encoding. */
8933 /* Discard the repeat count. */
8934 c
= readchar (remote_timeout
);
8939 /* A regular character. */
8945 /* Come here after finding the start of the frame. Collect the rest
8946 into *BUF, verifying the checksum, length, and handling run-length
8947 compression. NUL terminate the buffer. If there is not enough room,
8948 expand *BUF using xrealloc.
8950 Returns -1 on error, number of characters in buffer (ignoring the
8951 trailing NULL) on success. (could be extended to return one of the
8952 SERIAL status indications). */
8955 read_frame (char **buf_p
,
8962 struct remote_state
*rs
= get_remote_state ();
8969 c
= readchar (remote_timeout
);
8972 case SERIAL_TIMEOUT
:
8974 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8978 fputs_filtered ("Saw new packet start in middle of old one\n",
8980 return -1; /* Start a new packet, count retries. */
8983 unsigned char pktcsum
;
8989 check_0
= readchar (remote_timeout
);
8991 check_1
= readchar (remote_timeout
);
8993 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
8996 fputs_filtered ("Timeout in checksum, retrying\n",
9000 else if (check_0
< 0 || check_1
< 0)
9003 fputs_filtered ("Communication error in checksum\n",
9008 /* Don't recompute the checksum; with no ack packets we
9009 don't have any way to indicate a packet retransmission
9014 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
9015 if (csum
== pktcsum
)
9020 std::string str
= escape_buffer (buf
, bc
);
9022 fprintf_unfiltered (gdb_stdlog
,
9023 "Bad checksum, sentsum=0x%x, "
9024 "csum=0x%x, buf=%s\n",
9025 pktcsum
, csum
, str
.c_str ());
9027 /* Number of characters in buffer ignoring trailing
9031 case '*': /* Run length encoding. */
9036 c
= readchar (remote_timeout
);
9038 repeat
= c
- ' ' + 3; /* Compute repeat count. */
9040 /* The character before ``*'' is repeated. */
9042 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
9044 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
9046 /* Make some more room in the buffer. */
9047 *sizeof_buf
+= repeat
;
9048 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9052 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
9058 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
9062 if (bc
>= *sizeof_buf
- 1)
9064 /* Make some more room in the buffer. */
9066 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
9077 /* Read a packet from the remote machine, with error checking, and
9078 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9079 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9080 rather than timing out; this is used (in synchronous mode) to wait
9081 for a target that is is executing user code to stop. */
9082 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
9083 don't have to change all the calls to getpkt to deal with the
9084 return value, because at the moment I don't know what the right
9085 thing to do it for those. */
9091 getpkt_sane (buf
, sizeof_buf
, forever
);
9095 /* Read a packet from the remote machine, with error checking, and
9096 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
9097 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
9098 rather than timing out; this is used (in synchronous mode) to wait
9099 for a target that is is executing user code to stop. If FOREVER ==
9100 0, this function is allowed to time out gracefully and return an
9101 indication of this to the caller. Otherwise return the number of
9102 bytes read. If EXPECTING_NOTIF, consider receiving a notification
9103 enough reason to return to the caller. *IS_NOTIF is an output
9104 boolean that indicates whether *BUF holds a notification or not
9105 (a regular packet). */
9108 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
9109 int expecting_notif
, int *is_notif
)
9111 struct remote_state
*rs
= get_remote_state ();
9117 /* We're reading a new response. Make sure we don't look at a
9118 previously cached response. */
9119 rs
->cached_wait_status
= 0;
9121 strcpy (*buf
, "timeout");
9124 timeout
= watchdog
> 0 ? watchdog
: -1;
9125 else if (expecting_notif
)
9126 timeout
= 0; /* There should already be a char in the buffer. If
9129 timeout
= remote_timeout
;
9133 /* Process any number of notifications, and then return when
9137 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
9139 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
9141 /* This can loop forever if the remote side sends us
9142 characters continuously, but if it pauses, we'll get
9143 SERIAL_TIMEOUT from readchar because of timeout. Then
9144 we'll count that as a retry.
9146 Note that even when forever is set, we will only wait
9147 forever prior to the start of a packet. After that, we
9148 expect characters to arrive at a brisk pace. They should
9149 show up within remote_timeout intervals. */
9151 c
= readchar (timeout
);
9152 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
9154 if (c
== SERIAL_TIMEOUT
)
9156 if (expecting_notif
)
9157 return -1; /* Don't complain, it's normal to not get
9158 anything in this case. */
9160 if (forever
) /* Watchdog went off? Kill the target. */
9162 remote_unpush_target ();
9163 throw_error (TARGET_CLOSE_ERROR
,
9164 _("Watchdog timeout has expired. "
9165 "Target detached."));
9168 fputs_filtered ("Timed out.\n", gdb_stdlog
);
9172 /* We've found the start of a packet or notification.
9173 Now collect the data. */
9174 val
= read_frame (buf
, sizeof_buf
);
9179 remote_serial_write ("-", 1);
9182 if (tries
> MAX_TRIES
)
9184 /* We have tried hard enough, and just can't receive the
9185 packet/notification. Give up. */
9186 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
9188 /* Skip the ack char if we're in no-ack mode. */
9189 if (!rs
->noack_mode
)
9190 remote_serial_write ("+", 1);
9194 /* If we got an ordinary packet, return that to our caller. */
9200 = escape_buffer (*buf
,
9201 std::min (val
, REMOTE_DEBUG_MAX_CHAR
));
9203 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s",
9206 if (str
.length () > REMOTE_DEBUG_MAX_CHAR
)
9208 fprintf_unfiltered (gdb_stdlog
, "[%zu bytes omitted]",
9209 str
.length () - REMOTE_DEBUG_MAX_CHAR
);
9212 fprintf_unfiltered (gdb_stdlog
, "\n");
9215 /* Skip the ack char if we're in no-ack mode. */
9216 if (!rs
->noack_mode
)
9217 remote_serial_write ("+", 1);
9218 if (is_notif
!= NULL
)
9223 /* If we got a notification, handle it, and go back to looking
9227 gdb_assert (c
== '%');
9231 std::string str
= escape_buffer (*buf
, val
);
9233 fprintf_unfiltered (gdb_stdlog
,
9234 " Notification received: %s\n",
9237 if (is_notif
!= NULL
)
9240 handle_notification (rs
->notif_state
, *buf
);
9242 /* Notifications require no acknowledgement. */
9244 if (expecting_notif
)
9251 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
9253 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
9257 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
9260 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
9264 /* Check whether EVENT is a fork event for the process specified
9265 by the pid passed in DATA, and if it is, kill the fork child. */
9268 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
9269 QUEUE_ITER (stop_reply_p
) *iter
,
9273 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
9274 int parent_pid
= *(int *) param
->input
;
9276 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
9278 struct remote_state
*rs
= get_remote_state ();
9279 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
9282 res
= remote_vkill (child_pid
, rs
);
9284 error (_("Can't kill fork child process %d"), child_pid
);
9290 /* Kill any new fork children of process PID that haven't been
9291 processed by follow_fork. */
9294 kill_new_fork_children (int pid
, struct remote_state
*rs
)
9296 struct thread_info
*thread
;
9297 struct notif_client
*notif
= ¬if_client_stop
;
9298 struct queue_iter_param param
;
9300 /* Kill the fork child threads of any threads in process PID
9301 that are stopped at a fork event. */
9302 ALL_NON_EXITED_THREADS (thread
)
9304 struct target_waitstatus
*ws
= &thread
->pending_follow
;
9306 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
9308 struct remote_state
*rs
= get_remote_state ();
9309 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
9312 res
= remote_vkill (child_pid
, rs
);
9314 error (_("Can't kill fork child process %d"), child_pid
);
9318 /* Check for any pending fork events (not reported or processed yet)
9319 in process PID and kill those fork child threads as well. */
9320 remote_notif_get_pending_events (notif
);
9322 param
.output
= NULL
;
9323 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
9324 kill_child_of_pending_fork
, ¶m
);
9328 /* Target hook to kill the current inferior. */
9331 remote_kill (struct target_ops
*ops
)
9334 int pid
= ptid_get_pid (inferior_ptid
);
9335 struct remote_state
*rs
= get_remote_state ();
9337 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
9339 /* If we're stopped while forking and we haven't followed yet,
9340 kill the child task. We need to do this before killing the
9341 parent task because if this is a vfork then the parent will
9343 kill_new_fork_children (pid
, rs
);
9345 res
= remote_vkill (pid
, rs
);
9348 target_mourn_inferior (inferior_ptid
);
9353 /* If we are in 'target remote' mode and we are killing the only
9354 inferior, then we will tell gdbserver to exit and unpush the
9356 if (res
== -1 && !remote_multi_process_p (rs
)
9357 && number_of_live_inferiors () == 1)
9361 /* We've killed the remote end, we get to mourn it. If we are
9362 not in extended mode, mourning the inferior also unpushes
9363 remote_ops from the target stack, which closes the remote
9365 target_mourn_inferior (inferior_ptid
);
9370 error (_("Can't kill process"));
9373 /* Send a kill request to the target using the 'vKill' packet. */
9376 remote_vkill (int pid
, struct remote_state
*rs
)
9378 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
9381 /* Tell the remote target to detach. */
9382 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
9384 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9386 switch (packet_ok (rs
->buf
,
9387 &remote_protocol_packets
[PACKET_vKill
]))
9393 case PACKET_UNKNOWN
:
9396 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9400 /* Send a kill request to the target using the 'k' packet. */
9403 remote_kill_k (void)
9405 /* Catch errors so the user can quit from gdb even when we
9406 aren't on speaking terms with the remote system. */
9411 CATCH (ex
, RETURN_MASK_ERROR
)
9413 if (ex
.error
== TARGET_CLOSE_ERROR
)
9415 /* If we got an (EOF) error that caused the target
9416 to go away, then we're done, that's what we wanted.
9417 "k" is susceptible to cause a premature EOF, given
9418 that the remote server isn't actually required to
9419 reply to "k", and it can happen that it doesn't
9420 even get to reply ACK to the "k". */
9424 /* Otherwise, something went wrong. We didn't actually kill
9425 the target. Just propagate the exception, and let the
9426 user or higher layers decide what to do. */
9427 throw_exception (ex
);
9433 remote_mourn (struct target_ops
*target
)
9435 struct remote_state
*rs
= get_remote_state ();
9437 /* In 'target remote' mode with one inferior, we close the connection. */
9438 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9440 unpush_target (target
);
9442 /* remote_close takes care of doing most of the clean up. */
9443 generic_mourn_inferior ();
9447 /* In case we got here due to an error, but we're going to stay
9449 rs
->waiting_for_stop_reply
= 0;
9451 /* If the current general thread belonged to the process we just
9452 detached from or has exited, the remote side current general
9453 thread becomes undefined. Considering a case like this:
9455 - We just got here due to a detach.
9456 - The process that we're detaching from happens to immediately
9457 report a global breakpoint being hit in non-stop mode, in the
9458 same thread we had selected before.
9459 - GDB attaches to this process again.
9460 - This event happens to be the next event we handle.
9462 GDB would consider that the current general thread didn't need to
9463 be set on the stub side (with Hg), since for all it knew,
9464 GENERAL_THREAD hadn't changed.
9466 Notice that although in all-stop mode, the remote server always
9467 sets the current thread to the thread reporting the stop event,
9468 that doesn't happen in non-stop mode; in non-stop, the stub *must
9469 not* change the current thread when reporting a breakpoint hit,
9470 due to the decoupling of event reporting and event handling.
9472 To keep things simple, we always invalidate our notion of the
9474 record_currthread (rs
, minus_one_ptid
);
9476 /* Call common code to mark the inferior as not running. */
9477 generic_mourn_inferior ();
9479 if (!have_inferiors ())
9481 if (!remote_multi_process_p (rs
))
9483 /* Check whether the target is running now - some remote stubs
9484 automatically restart after kill. */
9486 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9488 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9490 /* Assume that the target has been restarted. Set
9491 inferior_ptid so that bits of core GDB realizes
9492 there's something here, e.g., so that the user can
9493 say "kill" again. */
9494 inferior_ptid
= magic_null_ptid
;
9501 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9503 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9507 extended_remote_disable_randomization (int val
)
9509 struct remote_state
*rs
= get_remote_state ();
9512 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9515 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9517 error (_("Target does not support QDisableRandomization."));
9518 if (strcmp (reply
, "OK") != 0)
9519 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9523 extended_remote_run (char *args
)
9525 struct remote_state
*rs
= get_remote_state ();
9527 const char *remote_exec_file
= get_remote_exec_file ();
9529 /* If the user has disabled vRun support, or we have detected that
9530 support is not available, do not try it. */
9531 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9534 strcpy (rs
->buf
, "vRun;");
9535 len
= strlen (rs
->buf
);
9537 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9538 error (_("Remote file name too long for run packet"));
9539 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9540 strlen (remote_exec_file
));
9542 gdb_assert (args
!= NULL
);
9545 struct cleanup
*back_to
;
9549 argv
= gdb_buildargv (args
);
9550 back_to
= make_cleanup_freeargv (argv
);
9551 for (i
= 0; argv
[i
] != NULL
; i
++)
9553 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9554 error (_("Argument list too long for run packet"));
9555 rs
->buf
[len
++] = ';';
9556 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9559 do_cleanups (back_to
);
9562 rs
->buf
[len
++] = '\0';
9565 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9567 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9570 /* We have a wait response. All is well. */
9572 case PACKET_UNKNOWN
:
9575 if (remote_exec_file
[0] == '\0')
9576 error (_("Running the default executable on the remote target failed; "
9577 "try \"set remote exec-file\"?"));
9579 error (_("Running \"%s\" on the remote target failed"),
9582 gdb_assert_not_reached (_("bad switch"));
9586 /* In the extended protocol we want to be able to do things like
9587 "run" and have them basically work as expected. So we need
9588 a special create_inferior function. We support changing the
9589 executable file and the command line arguments, but not the
9593 extended_remote_create_inferior (struct target_ops
*ops
,
9594 char *exec_file
, char *args
,
9595 char **env
, int from_tty
)
9599 struct remote_state
*rs
= get_remote_state ();
9600 const char *remote_exec_file
= get_remote_exec_file ();
9602 /* If running asynchronously, register the target file descriptor
9603 with the event loop. */
9604 if (target_can_async_p ())
9607 /* Disable address space randomization if requested (and supported). */
9608 if (extended_remote_supports_disable_randomization (ops
))
9609 extended_remote_disable_randomization (disable_randomization
);
9611 /* Now restart the remote server. */
9612 run_worked
= extended_remote_run (args
) != -1;
9615 /* vRun was not supported. Fail if we need it to do what the
9617 if (remote_exec_file
[0])
9618 error (_("Remote target does not support \"set remote exec-file\""));
9620 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9622 /* Fall back to "R". */
9623 extended_remote_restart ();
9626 if (!have_inferiors ())
9628 /* Clean up from the last time we ran, before we mark the target
9629 running again. This will mark breakpoints uninserted, and
9630 get_offsets may insert breakpoints. */
9631 init_thread_list ();
9632 init_wait_for_inferior ();
9635 /* vRun's success return is a stop reply. */
9636 stop_reply
= run_worked
? rs
->buf
: NULL
;
9637 add_current_inferior_and_thread (stop_reply
);
9639 /* Get updated offsets, if the stub uses qOffsets. */
9644 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9645 the list of conditions (in agent expression bytecode format), if any, the
9646 target needs to evaluate. The output is placed into the packet buffer
9647 started from BUF and ended at BUF_END. */
9650 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9651 struct bp_target_info
*bp_tgt
, char *buf
,
9654 if (bp_tgt
->conditions
.empty ())
9657 buf
+= strlen (buf
);
9658 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9661 /* Send conditions to the target and free the vector. */
9662 for (int ix
= 0; ix
< bp_tgt
->conditions
.size (); ix
++)
9664 struct agent_expr
*aexpr
= bp_tgt
->conditions
[ix
];
9666 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9667 buf
+= strlen (buf
);
9668 for (int i
= 0; i
< aexpr
->len
; ++i
)
9669 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9676 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9677 struct bp_target_info
*bp_tgt
, char *buf
)
9679 if (bp_tgt
->tcommands
.empty ())
9682 buf
+= strlen (buf
);
9684 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9685 buf
+= strlen (buf
);
9687 /* Concatenate all the agent expressions that are commands into the
9689 for (int ix
= 0; ix
< bp_tgt
->tcommands
.size (); ix
++)
9691 struct agent_expr
*aexpr
= bp_tgt
->tcommands
[ix
];
9693 sprintf (buf
, "X%x,", aexpr
->len
);
9694 buf
+= strlen (buf
);
9695 for (int i
= 0; i
< aexpr
->len
; ++i
)
9696 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9701 /* Insert a breakpoint. On targets that have software breakpoint
9702 support, we ask the remote target to do the work; on targets
9703 which don't, we insert a traditional memory breakpoint. */
9706 remote_insert_breakpoint (struct target_ops
*ops
,
9707 struct gdbarch
*gdbarch
,
9708 struct bp_target_info
*bp_tgt
)
9710 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9711 If it succeeds, then set the support to PACKET_ENABLE. If it
9712 fails, and the user has explicitly requested the Z support then
9713 report an error, otherwise, mark it disabled and go on. */
9715 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9717 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9718 struct remote_state
*rs
;
9722 /* Make sure the remote is pointing at the right process, if
9724 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9725 set_general_process ();
9727 rs
= get_remote_state ();
9729 endbuf
= rs
->buf
+ get_remote_packet_size ();
9734 addr
= (ULONGEST
) remote_address_masked (addr
);
9735 p
+= hexnumstr (p
, addr
);
9736 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9738 if (remote_supports_cond_breakpoints (ops
))
9739 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9741 if (remote_can_run_breakpoint_commands (ops
))
9742 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9745 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9747 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9753 case PACKET_UNKNOWN
:
9758 /* If this breakpoint has target-side commands but this stub doesn't
9759 support Z0 packets, throw error. */
9760 if (!bp_tgt
->tcommands
.empty ())
9761 throw_error (NOT_SUPPORTED_ERROR
, _("\
9762 Target doesn't support breakpoints that have target side commands."));
9764 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9768 remote_remove_breakpoint (struct target_ops
*ops
,
9769 struct gdbarch
*gdbarch
,
9770 struct bp_target_info
*bp_tgt
,
9771 enum remove_bp_reason reason
)
9773 CORE_ADDR addr
= bp_tgt
->placed_address
;
9774 struct remote_state
*rs
= get_remote_state ();
9776 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9779 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9781 /* Make sure the remote is pointing at the right process, if
9783 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9784 set_general_process ();
9790 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9791 p
+= hexnumstr (p
, addr
);
9792 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->kind
);
9795 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9797 return (rs
->buf
[0] == 'E');
9800 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
, reason
);
9803 static enum Z_packet_type
9804 watchpoint_to_Z_packet (int type
)
9809 return Z_PACKET_WRITE_WP
;
9812 return Z_PACKET_READ_WP
;
9815 return Z_PACKET_ACCESS_WP
;
9818 internal_error (__FILE__
, __LINE__
,
9819 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9824 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9825 enum target_hw_bp_type type
, struct expression
*cond
)
9827 struct remote_state
*rs
= get_remote_state ();
9828 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9830 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9832 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9835 /* Make sure the remote is pointing at the right process, if
9837 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9838 set_general_process ();
9840 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9841 p
= strchr (rs
->buf
, '\0');
9842 addr
= remote_address_masked (addr
);
9843 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9844 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9847 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9849 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9853 case PACKET_UNKNOWN
:
9858 internal_error (__FILE__
, __LINE__
,
9859 _("remote_insert_watchpoint: reached end of function"));
9863 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9864 CORE_ADDR start
, int length
)
9866 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9868 return diff
< length
;
9873 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9874 enum target_hw_bp_type type
, struct expression
*cond
)
9876 struct remote_state
*rs
= get_remote_state ();
9877 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9879 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9881 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9884 /* Make sure the remote is pointing at the right process, if
9886 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9887 set_general_process ();
9889 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
9890 p
= strchr (rs
->buf
, '\0');
9891 addr
= remote_address_masked (addr
);
9892 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9893 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9895 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9897 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9900 case PACKET_UNKNOWN
:
9905 internal_error (__FILE__
, __LINE__
,
9906 _("remote_remove_watchpoint: reached end of function"));
9910 int remote_hw_watchpoint_limit
= -1;
9911 int remote_hw_watchpoint_length_limit
= -1;
9912 int remote_hw_breakpoint_limit
= -1;
9915 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
9916 CORE_ADDR addr
, int len
)
9918 if (remote_hw_watchpoint_length_limit
== 0)
9920 else if (remote_hw_watchpoint_length_limit
< 0)
9922 else if (len
<= remote_hw_watchpoint_length_limit
)
9929 remote_check_watch_resources (struct target_ops
*self
,
9930 enum bptype type
, int cnt
, int ot
)
9932 if (type
== bp_hardware_breakpoint
)
9934 if (remote_hw_breakpoint_limit
== 0)
9936 else if (remote_hw_breakpoint_limit
< 0)
9938 else if (cnt
<= remote_hw_breakpoint_limit
)
9943 if (remote_hw_watchpoint_limit
== 0)
9945 else if (remote_hw_watchpoint_limit
< 0)
9949 else if (cnt
<= remote_hw_watchpoint_limit
)
9955 /* The to_stopped_by_sw_breakpoint method of target remote. */
9958 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
9960 struct thread_info
*thread
= inferior_thread ();
9962 return (thread
->priv
!= NULL
9963 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_SW_BREAKPOINT
);
9966 /* The to_supports_stopped_by_sw_breakpoint method of target
9970 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
9972 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
9975 /* The to_stopped_by_hw_breakpoint method of target remote. */
9978 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
9980 struct thread_info
*thread
= inferior_thread ();
9982 return (thread
->priv
!= NULL
9983 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_HW_BREAKPOINT
);
9986 /* The to_supports_stopped_by_hw_breakpoint method of target
9990 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
9992 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
9996 remote_stopped_by_watchpoint (struct target_ops
*ops
)
9998 struct thread_info
*thread
= inferior_thread ();
10000 return (thread
->priv
!= NULL
10001 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
);
10005 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
10007 struct thread_info
*thread
= inferior_thread ();
10009 if (thread
->priv
!= NULL
10010 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
)
10012 *addr_p
= thread
->priv
->watch_data_address
;
10021 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10022 struct bp_target_info
*bp_tgt
)
10024 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
10025 struct remote_state
*rs
;
10029 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10032 /* Make sure the remote is pointing at the right process, if
10034 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10035 set_general_process ();
10037 rs
= get_remote_state ();
10039 endbuf
= rs
->buf
+ get_remote_packet_size ();
10045 addr
= remote_address_masked (addr
);
10046 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10047 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10049 if (remote_supports_cond_breakpoints (self
))
10050 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
10052 if (remote_can_run_breakpoint_commands (self
))
10053 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
10056 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10058 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10061 if (rs
->buf
[1] == '.')
10063 message
= strchr (rs
->buf
+ 2, '.');
10065 error (_("Remote failure reply: %s"), message
+ 1);
10068 case PACKET_UNKNOWN
:
10073 internal_error (__FILE__
, __LINE__
,
10074 _("remote_insert_hw_breakpoint: reached end of function"));
10079 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
10080 struct bp_target_info
*bp_tgt
)
10083 struct remote_state
*rs
= get_remote_state ();
10085 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
10087 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
10090 /* Make sure the remote is pointing at the right process, if
10092 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
10093 set_general_process ();
10099 addr
= remote_address_masked (bp_tgt
->placed_address
);
10100 p
+= hexnumstr (p
, (ULONGEST
) addr
);
10101 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->kind
);
10104 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10106 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
10109 case PACKET_UNKNOWN
:
10114 internal_error (__FILE__
, __LINE__
,
10115 _("remote_remove_hw_breakpoint: reached end of function"));
10118 /* Verify memory using the "qCRC:" request. */
10121 remote_verify_memory (struct target_ops
*ops
,
10122 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
10124 struct remote_state
*rs
= get_remote_state ();
10125 unsigned long host_crc
, target_crc
;
10128 /* It doesn't make sense to use qCRC if the remote target is
10129 connected but not running. */
10130 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
10132 enum packet_result result
;
10134 /* Make sure the remote is pointing at the right process. */
10135 set_general_process ();
10137 /* FIXME: assumes lma can fit into long. */
10138 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
10139 (long) lma
, (long) size
);
10142 /* Be clever; compute the host_crc before waiting for target
10144 host_crc
= xcrc32 (data
, size
, 0xffffffff);
10146 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10148 result
= packet_ok (rs
->buf
,
10149 &remote_protocol_packets
[PACKET_qCRC
]);
10150 if (result
== PACKET_ERROR
)
10152 else if (result
== PACKET_OK
)
10154 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
10155 target_crc
= target_crc
* 16 + fromhex (*tmp
);
10157 return (host_crc
== target_crc
);
10161 return simple_verify_memory (ops
, data
, lma
, size
);
10164 /* compare-sections command
10166 With no arguments, compares each loadable section in the exec bfd
10167 with the same memory range on the target, and reports mismatches.
10168 Useful for verifying the image on the target against the exec file. */
10171 compare_sections_command (char *args
, int from_tty
)
10174 struct cleanup
*old_chain
;
10175 gdb_byte
*sectdata
;
10176 const char *sectname
;
10177 bfd_size_type size
;
10180 int mismatched
= 0;
10185 error (_("command cannot be used without an exec file"));
10187 /* Make sure the remote is pointing at the right process. */
10188 set_general_process ();
10190 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
10196 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
10198 if (!(s
->flags
& SEC_LOAD
))
10199 continue; /* Skip non-loadable section. */
10201 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
10202 continue; /* Skip writeable sections */
10204 size
= bfd_get_section_size (s
);
10206 continue; /* Skip zero-length section. */
10208 sectname
= bfd_get_section_name (exec_bfd
, s
);
10209 if (args
&& strcmp (args
, sectname
) != 0)
10210 continue; /* Not the section selected by user. */
10212 matched
= 1; /* Do this section. */
10215 sectdata
= (gdb_byte
*) xmalloc (size
);
10216 old_chain
= make_cleanup (xfree
, sectdata
);
10217 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
10219 res
= target_verify_memory (sectdata
, lma
, size
);
10222 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
10223 paddress (target_gdbarch (), lma
),
10224 paddress (target_gdbarch (), lma
+ size
));
10226 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
10227 paddress (target_gdbarch (), lma
),
10228 paddress (target_gdbarch (), lma
+ size
));
10230 printf_filtered ("matched.\n");
10233 printf_filtered ("MIS-MATCHED!\n");
10237 do_cleanups (old_chain
);
10239 if (mismatched
> 0)
10240 warning (_("One or more sections of the target image does not match\n\
10241 the loaded file\n"));
10242 if (args
&& !matched
)
10243 printf_filtered (_("No loaded section named '%s'.\n"), args
);
10246 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
10247 into remote target. The number of bytes written to the remote
10248 target is returned, or -1 for error. */
10250 static enum target_xfer_status
10251 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
10252 const char *annex
, const gdb_byte
*writebuf
,
10253 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
10254 struct packet_config
*packet
)
10258 struct remote_state
*rs
= get_remote_state ();
10259 int max_size
= get_memory_write_packet_size ();
10261 if (packet
->support
== PACKET_DISABLE
)
10262 return TARGET_XFER_E_IO
;
10264 /* Insert header. */
10265 i
= snprintf (rs
->buf
, max_size
,
10266 "qXfer:%s:write:%s:%s:",
10267 object_name
, annex
? annex
: "",
10268 phex_nz (offset
, sizeof offset
));
10269 max_size
-= (i
+ 1);
10271 /* Escape as much data as fits into rs->buf. */
10272 buf_len
= remote_escape_output
10273 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
10275 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
10276 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10277 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10278 return TARGET_XFER_E_IO
;
10280 unpack_varlen_hex (rs
->buf
, &n
);
10283 return TARGET_XFER_OK
;
10286 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
10287 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
10288 number of bytes read is returned, or 0 for EOF, or -1 for error.
10289 The number of bytes read may be less than LEN without indicating an
10290 EOF. PACKET is checked and updated to indicate whether the remote
10291 target supports this object. */
10293 static enum target_xfer_status
10294 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
10296 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
10297 ULONGEST
*xfered_len
,
10298 struct packet_config
*packet
)
10300 struct remote_state
*rs
= get_remote_state ();
10301 LONGEST i
, n
, packet_len
;
10303 if (packet
->support
== PACKET_DISABLE
)
10304 return TARGET_XFER_E_IO
;
10306 /* Check whether we've cached an end-of-object packet that matches
10308 if (rs
->finished_object
)
10310 if (strcmp (object_name
, rs
->finished_object
) == 0
10311 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
10312 && offset
== rs
->finished_offset
)
10313 return TARGET_XFER_EOF
;
10316 /* Otherwise, we're now reading something different. Discard
10318 xfree (rs
->finished_object
);
10319 xfree (rs
->finished_annex
);
10320 rs
->finished_object
= NULL
;
10321 rs
->finished_annex
= NULL
;
10324 /* Request only enough to fit in a single packet. The actual data
10325 may not, since we don't know how much of it will need to be escaped;
10326 the target is free to respond with slightly less data. We subtract
10327 five to account for the response type and the protocol frame. */
10328 n
= std::min
<LONGEST
> (get_remote_packet_size () - 5, len
);
10329 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
10330 object_name
, annex
? annex
: "",
10331 phex_nz (offset
, sizeof offset
),
10332 phex_nz (n
, sizeof n
));
10333 i
= putpkt (rs
->buf
);
10335 return TARGET_XFER_E_IO
;
10338 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10339 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10340 return TARGET_XFER_E_IO
;
10342 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
10343 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
10345 /* 'm' means there is (or at least might be) more data after this
10346 batch. That does not make sense unless there's at least one byte
10347 of data in this reply. */
10348 if (rs
->buf
[0] == 'm' && packet_len
== 1)
10349 error (_("Remote qXfer reply contained no data."));
10351 /* Got some data. */
10352 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
10353 packet_len
- 1, readbuf
, n
);
10355 /* 'l' is an EOF marker, possibly including a final block of data,
10356 or possibly empty. If we have the final block of a non-empty
10357 object, record this fact to bypass a subsequent partial read. */
10358 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
10360 rs
->finished_object
= xstrdup (object_name
);
10361 rs
->finished_annex
= xstrdup (annex
? annex
: "");
10362 rs
->finished_offset
= offset
+ i
;
10366 return TARGET_XFER_EOF
;
10370 return TARGET_XFER_OK
;
10374 static enum target_xfer_status
10375 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
10376 const char *annex
, gdb_byte
*readbuf
,
10377 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
10378 ULONGEST
*xfered_len
)
10380 struct remote_state
*rs
;
10384 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10386 set_remote_traceframe ();
10387 set_general_thread (inferior_ptid
);
10389 rs
= get_remote_state ();
10391 /* Handle memory using the standard memory routines. */
10392 if (object
== TARGET_OBJECT_MEMORY
)
10394 /* If the remote target is connected but not running, we should
10395 pass this request down to a lower stratum (e.g. the executable
10397 if (!target_has_execution
)
10398 return TARGET_XFER_EOF
;
10400 if (writebuf
!= NULL
)
10401 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10404 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10408 /* Handle SPU memory using qxfer packets. */
10409 if (object
== TARGET_OBJECT_SPU
)
10412 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10413 xfered_len
, &remote_protocol_packets
10414 [PACKET_qXfer_spu_read
]);
10416 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10417 xfered_len
, &remote_protocol_packets
10418 [PACKET_qXfer_spu_write
]);
10421 /* Handle extra signal info using qxfer packets. */
10422 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10425 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10426 xfered_len
, &remote_protocol_packets
10427 [PACKET_qXfer_siginfo_read
]);
10429 return remote_write_qxfer (ops
, "siginfo", annex
,
10430 writebuf
, offset
, len
, xfered_len
,
10431 &remote_protocol_packets
10432 [PACKET_qXfer_siginfo_write
]);
10435 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10438 return remote_read_qxfer (ops
, "statictrace", annex
,
10439 readbuf
, offset
, len
, xfered_len
,
10440 &remote_protocol_packets
10441 [PACKET_qXfer_statictrace_read
]);
10443 return TARGET_XFER_E_IO
;
10446 /* Only handle flash writes. */
10447 if (writebuf
!= NULL
)
10451 case TARGET_OBJECT_FLASH
:
10452 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10456 return TARGET_XFER_E_IO
;
10460 /* Map pre-existing objects onto letters. DO NOT do this for new
10461 objects!!! Instead specify new query packets. */
10464 case TARGET_OBJECT_AVR
:
10468 case TARGET_OBJECT_AUXV
:
10469 gdb_assert (annex
== NULL
);
10470 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10472 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10474 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10475 return remote_read_qxfer
10476 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10477 &remote_protocol_packets
[PACKET_qXfer_features
]);
10479 case TARGET_OBJECT_LIBRARIES
:
10480 return remote_read_qxfer
10481 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10482 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10484 case TARGET_OBJECT_LIBRARIES_SVR4
:
10485 return remote_read_qxfer
10486 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10487 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10489 case TARGET_OBJECT_MEMORY_MAP
:
10490 gdb_assert (annex
== NULL
);
10491 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10493 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10495 case TARGET_OBJECT_OSDATA
:
10496 /* Should only get here if we're connected. */
10497 gdb_assert (rs
->remote_desc
);
10498 return remote_read_qxfer
10499 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10500 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10502 case TARGET_OBJECT_THREADS
:
10503 gdb_assert (annex
== NULL
);
10504 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10506 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10508 case TARGET_OBJECT_TRACEFRAME_INFO
:
10509 gdb_assert (annex
== NULL
);
10510 return remote_read_qxfer
10511 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10512 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10514 case TARGET_OBJECT_FDPIC
:
10515 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10517 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10519 case TARGET_OBJECT_OPENVMS_UIB
:
10520 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10522 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10524 case TARGET_OBJECT_BTRACE
:
10525 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10527 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10529 case TARGET_OBJECT_BTRACE_CONF
:
10530 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10532 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10534 case TARGET_OBJECT_EXEC_FILE
:
10535 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10537 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10540 return TARGET_XFER_E_IO
;
10543 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10544 large enough let the caller deal with it. */
10545 if (len
< get_remote_packet_size ())
10546 return TARGET_XFER_E_IO
;
10547 len
= get_remote_packet_size ();
10549 /* Except for querying the minimum buffer size, target must be open. */
10550 if (!rs
->remote_desc
)
10551 error (_("remote query is only available after target open"));
10553 gdb_assert (annex
!= NULL
);
10554 gdb_assert (readbuf
!= NULL
);
10558 *p2
++ = query_type
;
10560 /* We used one buffer char for the remote protocol q command and
10561 another for the query type. As the remote protocol encapsulation
10562 uses 4 chars plus one extra in case we are debugging
10563 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10566 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10568 /* Bad caller may have sent forbidden characters. */
10569 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10574 gdb_assert (annex
[i
] == '\0');
10576 i
= putpkt (rs
->buf
);
10578 return TARGET_XFER_E_IO
;
10580 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10581 strcpy ((char *) readbuf
, rs
->buf
);
10583 *xfered_len
= strlen ((char *) readbuf
);
10584 return TARGET_XFER_OK
;
10587 /* Implementation of to_get_memory_xfer_limit. */
10590 remote_get_memory_xfer_limit (struct target_ops
*ops
)
10592 return get_memory_write_packet_size ();
10596 remote_search_memory (struct target_ops
* ops
,
10597 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10598 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10599 CORE_ADDR
*found_addrp
)
10601 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10602 struct remote_state
*rs
= get_remote_state ();
10603 int max_size
= get_memory_write_packet_size ();
10604 struct packet_config
*packet
=
10605 &remote_protocol_packets
[PACKET_qSearch_memory
];
10606 /* Number of packet bytes used to encode the pattern;
10607 this could be more than PATTERN_LEN due to escape characters. */
10608 int escaped_pattern_len
;
10609 /* Amount of pattern that was encodable in the packet. */
10610 int used_pattern_len
;
10613 ULONGEST found_addr
;
10615 /* Don't go to the target if we don't have to.
10616 This is done before checking packet->support to avoid the possibility that
10617 a success for this edge case means the facility works in general. */
10618 if (pattern_len
> search_space_len
)
10620 if (pattern_len
== 0)
10622 *found_addrp
= start_addr
;
10626 /* If we already know the packet isn't supported, fall back to the simple
10627 way of searching memory. */
10629 if (packet_config_support (packet
) == PACKET_DISABLE
)
10631 /* Target doesn't provided special support, fall back and use the
10632 standard support (copy memory and do the search here). */
10633 return simple_search_memory (ops
, start_addr
, search_space_len
,
10634 pattern
, pattern_len
, found_addrp
);
10637 /* Make sure the remote is pointing at the right process. */
10638 set_general_process ();
10640 /* Insert header. */
10641 i
= snprintf (rs
->buf
, max_size
,
10642 "qSearch:memory:%s;%s;",
10643 phex_nz (start_addr
, addr_size
),
10644 phex_nz (search_space_len
, sizeof (search_space_len
)));
10645 max_size
-= (i
+ 1);
10647 /* Escape as much data as fits into rs->buf. */
10648 escaped_pattern_len
=
10649 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10650 &used_pattern_len
, max_size
);
10652 /* Bail if the pattern is too large. */
10653 if (used_pattern_len
!= pattern_len
)
10654 error (_("Pattern is too large to transmit to remote target."));
10656 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10657 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10658 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10660 /* The request may not have worked because the command is not
10661 supported. If so, fall back to the simple way. */
10662 if (packet
->support
== PACKET_DISABLE
)
10664 return simple_search_memory (ops
, start_addr
, search_space_len
,
10665 pattern
, pattern_len
, found_addrp
);
10670 if (rs
->buf
[0] == '0')
10672 else if (rs
->buf
[0] == '1')
10675 if (rs
->buf
[1] != ',')
10676 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10677 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10678 *found_addrp
= found_addr
;
10681 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10687 remote_rcmd (struct target_ops
*self
, const char *command
,
10688 struct ui_file
*outbuf
)
10690 struct remote_state
*rs
= get_remote_state ();
10693 if (!rs
->remote_desc
)
10694 error (_("remote rcmd is only available after target open"));
10696 /* Send a NULL command across as an empty command. */
10697 if (command
== NULL
)
10700 /* The query prefix. */
10701 strcpy (rs
->buf
, "qRcmd,");
10702 p
= strchr (rs
->buf
, '\0');
10704 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10705 > get_remote_packet_size ())
10706 error (_("\"monitor\" command ``%s'' is too long."), command
);
10708 /* Encode the actual command. */
10709 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10711 if (putpkt (rs
->buf
) < 0)
10712 error (_("Communication problem with target."));
10714 /* get/display the response */
10719 /* XXX - see also remote_get_noisy_reply(). */
10720 QUIT
; /* Allow user to bail out with ^C. */
10722 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10724 /* Timeout. Continue to (try to) read responses.
10725 This is better than stopping with an error, assuming the stub
10726 is still executing the (long) monitor command.
10727 If needed, the user can interrupt gdb using C-c, obtaining
10728 an effect similar to stop on timeout. */
10732 if (buf
[0] == '\0')
10733 error (_("Target does not support this command."));
10734 if (buf
[0] == 'O' && buf
[1] != 'K')
10736 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10739 if (strcmp (buf
, "OK") == 0)
10741 if (strlen (buf
) == 3 && buf
[0] == 'E'
10742 && isdigit (buf
[1]) && isdigit (buf
[2]))
10744 error (_("Protocol error with Rcmd"));
10746 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10748 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10750 fputc_unfiltered (c
, outbuf
);
10756 static VEC(mem_region_s
) *
10757 remote_memory_map (struct target_ops
*ops
)
10759 VEC(mem_region_s
) *result
= NULL
;
10760 char *text
= target_read_stralloc (¤t_target
,
10761 TARGET_OBJECT_MEMORY_MAP
, NULL
);
10765 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
10767 result
= parse_memory_map (text
);
10768 do_cleanups (back_to
);
10775 packet_command (char *args
, int from_tty
)
10777 struct remote_state
*rs
= get_remote_state ();
10779 if (!rs
->remote_desc
)
10780 error (_("command can only be used with remote target"));
10783 error (_("remote-packet command requires packet text as argument"));
10785 puts_filtered ("sending: ");
10786 print_packet (args
);
10787 puts_filtered ("\n");
10790 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10791 puts_filtered ("received: ");
10792 print_packet (rs
->buf
);
10793 puts_filtered ("\n");
10797 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10799 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10801 static void threadset_test_cmd (char *cmd
, int tty
);
10803 static void threadalive_test (char *cmd
, int tty
);
10805 static void threadlist_test_cmd (char *cmd
, int tty
);
10807 int get_and_display_threadinfo (threadref
*ref
);
10809 static void threadinfo_test_cmd (char *cmd
, int tty
);
10811 static int thread_display_step (threadref
*ref
, void *context
);
10813 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10815 static void init_remote_threadtests (void);
10817 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10820 threadset_test_cmd (char *cmd
, int tty
)
10822 int sample_thread
= SAMPLE_THREAD
;
10824 printf_filtered (_("Remote threadset test\n"));
10825 set_general_thread (sample_thread
);
10830 threadalive_test (char *cmd
, int tty
)
10832 int sample_thread
= SAMPLE_THREAD
;
10833 int pid
= ptid_get_pid (inferior_ptid
);
10834 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10836 if (remote_thread_alive (ptid
))
10837 printf_filtered ("PASS: Thread alive test\n");
10839 printf_filtered ("FAIL: Thread alive test\n");
10842 void output_threadid (char *title
, threadref
*ref
);
10845 output_threadid (char *title
, threadref
*ref
)
10849 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10851 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10855 threadlist_test_cmd (char *cmd
, int tty
)
10858 threadref nextthread
;
10859 int done
, result_count
;
10860 threadref threadlist
[3];
10862 printf_filtered ("Remote Threadlist test\n");
10863 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10864 &result_count
, &threadlist
[0]))
10865 printf_filtered ("FAIL: threadlist test\n");
10868 threadref
*scan
= threadlist
;
10869 threadref
*limit
= scan
+ result_count
;
10871 while (scan
< limit
)
10872 output_threadid (" thread ", scan
++);
10877 display_thread_info (struct gdb_ext_thread_info
*info
)
10879 output_threadid ("Threadid: ", &info
->threadid
);
10880 printf_filtered ("Name: %s\n ", info
->shortname
);
10881 printf_filtered ("State: %s\n", info
->display
);
10882 printf_filtered ("other: %s\n\n", info
->more_display
);
10886 get_and_display_threadinfo (threadref
*ref
)
10890 struct gdb_ext_thread_info threadinfo
;
10892 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
10893 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
10894 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
10895 display_thread_info (&threadinfo
);
10900 threadinfo_test_cmd (char *cmd
, int tty
)
10902 int athread
= SAMPLE_THREAD
;
10906 int_to_threadref (&thread
, athread
);
10907 printf_filtered ("Remote Threadinfo test\n");
10908 if (!get_and_display_threadinfo (&thread
))
10909 printf_filtered ("FAIL cannot get thread info\n");
10913 thread_display_step (threadref
*ref
, void *context
)
10915 /* output_threadid(" threadstep ",ref); *//* simple test */
10916 return get_and_display_threadinfo (ref
);
10920 threadlist_update_test_cmd (char *cmd
, int tty
)
10922 printf_filtered ("Remote Threadlist update test\n");
10923 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
10927 init_remote_threadtests (void)
10929 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
10930 _("Fetch and print the remote list of "
10931 "thread identifiers, one pkt only"));
10932 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
10933 _("Fetch and display info about one thread"));
10934 add_com ("tset", class_obscure
, threadset_test_cmd
,
10935 _("Test setting to a different thread"));
10936 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
10937 _("Iterate through updating all remote thread info"));
10938 add_com ("talive", class_obscure
, threadalive_test
,
10939 _(" Remote thread alive test "));
10944 /* Convert a thread ID to a string. Returns the string in a static
10948 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
10950 static char buf
[64];
10951 struct remote_state
*rs
= get_remote_state ();
10953 if (ptid_equal (ptid
, null_ptid
))
10954 return normal_pid_to_str (ptid
);
10955 else if (ptid_is_pid (ptid
))
10957 /* Printing an inferior target id. */
10959 /* When multi-process extensions are off, there's no way in the
10960 remote protocol to know the remote process id, if there's any
10961 at all. There's one exception --- when we're connected with
10962 target extended-remote, and we manually attached to a process
10963 with "attach PID". We don't record anywhere a flag that
10964 allows us to distinguish that case from the case of
10965 connecting with extended-remote and the stub already being
10966 attached to a process, and reporting yes to qAttached, hence
10967 no smart special casing here. */
10968 if (!remote_multi_process_p (rs
))
10970 xsnprintf (buf
, sizeof buf
, "Remote target");
10974 return normal_pid_to_str (ptid
);
10978 if (ptid_equal (magic_null_ptid
, ptid
))
10979 xsnprintf (buf
, sizeof buf
, "Thread <main>");
10980 else if (remote_multi_process_p (rs
))
10981 if (ptid_get_lwp (ptid
) == 0)
10982 return normal_pid_to_str (ptid
);
10984 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
10985 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
10987 xsnprintf (buf
, sizeof buf
, "Thread %ld",
10988 ptid_get_lwp (ptid
));
10993 /* Get the address of the thread local variable in OBJFILE which is
10994 stored at OFFSET within the thread local storage for thread PTID. */
10997 remote_get_thread_local_address (struct target_ops
*ops
,
10998 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
11000 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
11002 struct remote_state
*rs
= get_remote_state ();
11004 char *endp
= rs
->buf
+ get_remote_packet_size ();
11005 enum packet_result result
;
11007 strcpy (p
, "qGetTLSAddr:");
11009 p
= write_ptid (p
, endp
, ptid
);
11011 p
+= hexnumstr (p
, offset
);
11013 p
+= hexnumstr (p
, lm
);
11017 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11018 result
= packet_ok (rs
->buf
,
11019 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
11020 if (result
== PACKET_OK
)
11024 unpack_varlen_hex (rs
->buf
, &result
);
11027 else if (result
== PACKET_UNKNOWN
)
11028 throw_error (TLS_GENERIC_ERROR
,
11029 _("Remote target doesn't support qGetTLSAddr packet"));
11031 throw_error (TLS_GENERIC_ERROR
,
11032 _("Remote target failed to process qGetTLSAddr request"));
11035 throw_error (TLS_GENERIC_ERROR
,
11036 _("TLS not supported or disabled on this target"));
11041 /* Provide thread local base, i.e. Thread Information Block address.
11042 Returns 1 if ptid is found and thread_local_base is non zero. */
11045 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
11047 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
11049 struct remote_state
*rs
= get_remote_state ();
11051 char *endp
= rs
->buf
+ get_remote_packet_size ();
11052 enum packet_result result
;
11054 strcpy (p
, "qGetTIBAddr:");
11056 p
= write_ptid (p
, endp
, ptid
);
11060 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
11061 result
= packet_ok (rs
->buf
,
11062 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
11063 if (result
== PACKET_OK
)
11067 unpack_varlen_hex (rs
->buf
, &result
);
11069 *addr
= (CORE_ADDR
) result
;
11072 else if (result
== PACKET_UNKNOWN
)
11073 error (_("Remote target doesn't support qGetTIBAddr packet"));
11075 error (_("Remote target failed to process qGetTIBAddr request"));
11078 error (_("qGetTIBAddr not supported or disabled on this target"));
11083 /* Support for inferring a target description based on the current
11084 architecture and the size of a 'g' packet. While the 'g' packet
11085 can have any size (since optional registers can be left off the
11086 end), some sizes are easily recognizable given knowledge of the
11087 approximate architecture. */
11089 struct remote_g_packet_guess
11092 const struct target_desc
*tdesc
;
11094 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
11095 DEF_VEC_O(remote_g_packet_guess_s
);
11097 struct remote_g_packet_data
11099 VEC(remote_g_packet_guess_s
) *guesses
;
11102 static struct gdbarch_data
*remote_g_packet_data_handle
;
11105 remote_g_packet_data_init (struct obstack
*obstack
)
11107 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
11111 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
11112 const struct target_desc
*tdesc
)
11114 struct remote_g_packet_data
*data
11115 = ((struct remote_g_packet_data
*)
11116 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
11117 struct remote_g_packet_guess new_guess
, *guess
;
11120 gdb_assert (tdesc
!= NULL
);
11123 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11125 if (guess
->bytes
== bytes
)
11126 internal_error (__FILE__
, __LINE__
,
11127 _("Duplicate g packet description added for size %d"),
11130 new_guess
.bytes
= bytes
;
11131 new_guess
.tdesc
= tdesc
;
11132 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
11135 /* Return 1 if remote_read_description would do anything on this target
11136 and architecture, 0 otherwise. */
11139 remote_read_description_p (struct target_ops
*target
)
11141 struct remote_g_packet_data
*data
11142 = ((struct remote_g_packet_data
*)
11143 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11145 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11151 static const struct target_desc
*
11152 remote_read_description (struct target_ops
*target
)
11154 struct remote_g_packet_data
*data
11155 = ((struct remote_g_packet_data
*)
11156 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
11158 /* Do not try this during initial connection, when we do not know
11159 whether there is a running but stopped thread. */
11160 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
11161 return target
->beneath
->to_read_description (target
->beneath
);
11163 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
11165 struct remote_g_packet_guess
*guess
;
11167 int bytes
= send_g_packet ();
11170 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
11172 if (guess
->bytes
== bytes
)
11173 return guess
->tdesc
;
11175 /* We discard the g packet. A minor optimization would be to
11176 hold on to it, and fill the register cache once we have selected
11177 an architecture, but it's too tricky to do safely. */
11180 return target
->beneath
->to_read_description (target
->beneath
);
11183 /* Remote file transfer support. This is host-initiated I/O, not
11184 target-initiated; for target-initiated, see remote-fileio.c. */
11186 /* If *LEFT is at least the length of STRING, copy STRING to
11187 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11188 decrease *LEFT. Otherwise raise an error. */
11191 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
11193 int len
= strlen (string
);
11196 error (_("Packet too long for target."));
11198 memcpy (*buffer
, string
, len
);
11202 /* NUL-terminate the buffer as a convenience, if there is
11208 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
11209 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11210 decrease *LEFT. Otherwise raise an error. */
11213 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
11216 if (2 * len
> *left
)
11217 error (_("Packet too long for target."));
11219 bin2hex (bytes
, *buffer
, len
);
11220 *buffer
+= 2 * len
;
11223 /* NUL-terminate the buffer as a convenience, if there is
11229 /* If *LEFT is large enough, convert VALUE to hex and add it to
11230 *BUFFER, update *BUFFER to point to the new end of the buffer, and
11231 decrease *LEFT. Otherwise raise an error. */
11234 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
11236 int len
= hexnumlen (value
);
11239 error (_("Packet too long for target."));
11241 hexnumstr (*buffer
, value
);
11245 /* NUL-terminate the buffer as a convenience, if there is
11251 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
11252 value, *REMOTE_ERRNO to the remote error number or zero if none
11253 was included, and *ATTACHMENT to point to the start of the annex
11254 if any. The length of the packet isn't needed here; there may
11255 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
11257 Return 0 if the packet could be parsed, -1 if it could not. If
11258 -1 is returned, the other variables may not be initialized. */
11261 remote_hostio_parse_result (char *buffer
, int *retcode
,
11262 int *remote_errno
, char **attachment
)
11267 *attachment
= NULL
;
11269 if (buffer
[0] != 'F')
11273 *retcode
= strtol (&buffer
[1], &p
, 16);
11274 if (errno
!= 0 || p
== &buffer
[1])
11277 /* Check for ",errno". */
11281 *remote_errno
= strtol (p
+ 1, &p2
, 16);
11282 if (errno
!= 0 || p
+ 1 == p2
)
11287 /* Check for ";attachment". If there is no attachment, the
11288 packet should end here. */
11291 *attachment
= p
+ 1;
11294 else if (*p
== '\0')
11300 /* Send a prepared I/O packet to the target and read its response.
11301 The prepared packet is in the global RS->BUF before this function
11302 is called, and the answer is there when we return.
11304 COMMAND_BYTES is the length of the request to send, which may include
11305 binary data. WHICH_PACKET is the packet configuration to check
11306 before attempting a packet. If an error occurs, *REMOTE_ERRNO
11307 is set to the error number and -1 is returned. Otherwise the value
11308 returned by the function is returned.
11310 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
11311 attachment is expected; an error will be reported if there's a
11312 mismatch. If one is found, *ATTACHMENT will be set to point into
11313 the packet buffer and *ATTACHMENT_LEN will be set to the
11314 attachment's length. */
11317 remote_hostio_send_command (int command_bytes
, int which_packet
,
11318 int *remote_errno
, char **attachment
,
11319 int *attachment_len
)
11321 struct remote_state
*rs
= get_remote_state ();
11322 int ret
, bytes_read
;
11323 char *attachment_tmp
;
11325 if (!rs
->remote_desc
11326 || packet_support (which_packet
) == PACKET_DISABLE
)
11328 *remote_errno
= FILEIO_ENOSYS
;
11332 putpkt_binary (rs
->buf
, command_bytes
);
11333 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
11335 /* If it timed out, something is wrong. Don't try to parse the
11337 if (bytes_read
< 0)
11339 *remote_errno
= FILEIO_EINVAL
;
11343 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
11346 *remote_errno
= FILEIO_EINVAL
;
11348 case PACKET_UNKNOWN
:
11349 *remote_errno
= FILEIO_ENOSYS
;
11355 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
11358 *remote_errno
= FILEIO_EINVAL
;
11362 /* Make sure we saw an attachment if and only if we expected one. */
11363 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
11364 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
11366 *remote_errno
= FILEIO_EINVAL
;
11370 /* If an attachment was found, it must point into the packet buffer;
11371 work out how many bytes there were. */
11372 if (attachment_tmp
!= NULL
)
11374 *attachment
= attachment_tmp
;
11375 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
11381 /* Invalidate the readahead cache. */
11384 readahead_cache_invalidate (void)
11386 struct remote_state
*rs
= get_remote_state ();
11388 rs
->readahead_cache
.fd
= -1;
11391 /* Invalidate the readahead cache if it is holding data for FD. */
11394 readahead_cache_invalidate_fd (int fd
)
11396 struct remote_state
*rs
= get_remote_state ();
11398 if (rs
->readahead_cache
.fd
== fd
)
11399 rs
->readahead_cache
.fd
= -1;
11402 /* Set the filesystem remote_hostio functions that take FILENAME
11403 arguments will use. Return 0 on success, or -1 if an error
11404 occurs (and set *REMOTE_ERRNO). */
11407 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11409 struct remote_state
*rs
= get_remote_state ();
11410 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11412 int left
= get_remote_packet_size () - 1;
11416 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11419 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11422 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11424 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11425 remote_buffer_add_string (&p
, &left
, arg
);
11427 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11428 remote_errno
, NULL
, NULL
);
11430 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11434 rs
->fs_pid
= required_pid
;
11439 /* Implementation of to_fileio_open. */
11442 remote_hostio_open (struct target_ops
*self
,
11443 struct inferior
*inf
, const char *filename
,
11444 int flags
, int mode
, int warn_if_slow
,
11447 struct remote_state
*rs
= get_remote_state ();
11449 int left
= get_remote_packet_size () - 1;
11453 static int warning_issued
= 0;
11455 printf_unfiltered (_("Reading %s from remote target...\n"),
11458 if (!warning_issued
)
11460 warning (_("File transfers from remote targets can be slow."
11461 " Use \"set sysroot\" to access files locally"
11463 warning_issued
= 1;
11467 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11470 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11472 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11473 strlen (filename
));
11474 remote_buffer_add_string (&p
, &left
, ",");
11476 remote_buffer_add_int (&p
, &left
, flags
);
11477 remote_buffer_add_string (&p
, &left
, ",");
11479 remote_buffer_add_int (&p
, &left
, mode
);
11481 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11482 remote_errno
, NULL
, NULL
);
11485 /* Implementation of to_fileio_pwrite. */
11488 remote_hostio_pwrite (struct target_ops
*self
,
11489 int fd
, const gdb_byte
*write_buf
, int len
,
11490 ULONGEST offset
, int *remote_errno
)
11492 struct remote_state
*rs
= get_remote_state ();
11494 int left
= get_remote_packet_size ();
11497 readahead_cache_invalidate_fd (fd
);
11499 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11501 remote_buffer_add_int (&p
, &left
, fd
);
11502 remote_buffer_add_string (&p
, &left
, ",");
11504 remote_buffer_add_int (&p
, &left
, offset
);
11505 remote_buffer_add_string (&p
, &left
, ",");
11507 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11508 get_remote_packet_size () - (p
- rs
->buf
));
11510 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11511 remote_errno
, NULL
, NULL
);
11514 /* Helper for the implementation of to_fileio_pread. Read the file
11515 from the remote side with vFile:pread. */
11518 remote_hostio_pread_vFile (struct target_ops
*self
,
11519 int fd
, gdb_byte
*read_buf
, int len
,
11520 ULONGEST offset
, int *remote_errno
)
11522 struct remote_state
*rs
= get_remote_state ();
11525 int left
= get_remote_packet_size ();
11526 int ret
, attachment_len
;
11529 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11531 remote_buffer_add_int (&p
, &left
, fd
);
11532 remote_buffer_add_string (&p
, &left
, ",");
11534 remote_buffer_add_int (&p
, &left
, len
);
11535 remote_buffer_add_string (&p
, &left
, ",");
11537 remote_buffer_add_int (&p
, &left
, offset
);
11539 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11540 remote_errno
, &attachment
,
11546 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11548 if (read_len
!= ret
)
11549 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11554 /* Serve pread from the readahead cache. Returns number of bytes
11555 read, or 0 if the request can't be served from the cache. */
11558 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11559 int fd
, gdb_byte
*read_buf
, size_t len
,
11562 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11564 if (cache
->fd
== fd
11565 && cache
->offset
<= offset
11566 && offset
< cache
->offset
+ cache
->bufsize
)
11568 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11570 if (offset
+ len
> max
)
11571 len
= max
- offset
;
11573 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11580 /* Implementation of to_fileio_pread. */
11583 remote_hostio_pread (struct target_ops
*self
,
11584 int fd
, gdb_byte
*read_buf
, int len
,
11585 ULONGEST offset
, int *remote_errno
)
11588 struct remote_state
*rs
= get_remote_state ();
11589 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11591 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11594 cache
->hit_count
++;
11597 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11598 pulongest (cache
->hit_count
));
11602 cache
->miss_count
++;
11604 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11605 pulongest (cache
->miss_count
));
11608 cache
->offset
= offset
;
11609 cache
->bufsize
= get_remote_packet_size ();
11610 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11612 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11613 cache
->offset
, remote_errno
);
11616 readahead_cache_invalidate_fd (fd
);
11620 cache
->bufsize
= ret
;
11621 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11624 /* Implementation of to_fileio_close. */
11627 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11629 struct remote_state
*rs
= get_remote_state ();
11631 int left
= get_remote_packet_size () - 1;
11633 readahead_cache_invalidate_fd (fd
);
11635 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11637 remote_buffer_add_int (&p
, &left
, fd
);
11639 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11640 remote_errno
, NULL
, NULL
);
11643 /* Implementation of to_fileio_unlink. */
11646 remote_hostio_unlink (struct target_ops
*self
,
11647 struct inferior
*inf
, const char *filename
,
11650 struct remote_state
*rs
= get_remote_state ();
11652 int left
= get_remote_packet_size () - 1;
11654 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11657 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11659 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11660 strlen (filename
));
11662 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11663 remote_errno
, NULL
, NULL
);
11666 /* Implementation of to_fileio_readlink. */
11669 remote_hostio_readlink (struct target_ops
*self
,
11670 struct inferior
*inf
, const char *filename
,
11673 struct remote_state
*rs
= get_remote_state ();
11676 int left
= get_remote_packet_size ();
11677 int len
, attachment_len
;
11681 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11684 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11686 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11687 strlen (filename
));
11689 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11690 remote_errno
, &attachment
,
11696 ret
= (char *) xmalloc (len
+ 1);
11698 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11699 (gdb_byte
*) ret
, len
);
11700 if (read_len
!= len
)
11701 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11707 /* Implementation of to_fileio_fstat. */
11710 remote_hostio_fstat (struct target_ops
*self
,
11711 int fd
, struct stat
*st
,
11714 struct remote_state
*rs
= get_remote_state ();
11716 int left
= get_remote_packet_size ();
11717 int attachment_len
, ret
;
11719 struct fio_stat fst
;
11722 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11724 remote_buffer_add_int (&p
, &left
, fd
);
11726 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11727 remote_errno
, &attachment
,
11731 if (*remote_errno
!= FILEIO_ENOSYS
)
11734 /* Strictly we should return -1, ENOSYS here, but when
11735 "set sysroot remote:" was implemented in August 2008
11736 BFD's need for a stat function was sidestepped with
11737 this hack. This was not remedied until March 2015
11738 so we retain the previous behavior to avoid breaking
11741 Note that the memset is a March 2015 addition; older
11742 GDBs set st_size *and nothing else* so the structure
11743 would have garbage in all other fields. This might
11744 break something but retaining the previous behavior
11745 here would be just too wrong. */
11747 memset (st
, 0, sizeof (struct stat
));
11748 st
->st_size
= INT_MAX
;
11752 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11753 (gdb_byte
*) &fst
, sizeof (fst
));
11755 if (read_len
!= ret
)
11756 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11758 if (read_len
!= sizeof (fst
))
11759 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11760 read_len
, (int) sizeof (fst
));
11762 remote_fileio_to_host_stat (&fst
, st
);
11767 /* Implementation of to_filesystem_is_local. */
11770 remote_filesystem_is_local (struct target_ops
*self
)
11772 /* Valgrind GDB presents itself as a remote target but works
11773 on the local filesystem: it does not implement remote get
11774 and users are not expected to set a sysroot. To handle
11775 this case we treat the remote filesystem as local if the
11776 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11777 does not support vFile:open. */
11778 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11780 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11782 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11784 int fd
, remote_errno
;
11786 /* Try opening a file to probe support. The supplied
11787 filename is irrelevant, we only care about whether
11788 the stub recognizes the packet or not. */
11789 fd
= remote_hostio_open (self
, NULL
, "just probing",
11790 FILEIO_O_RDONLY
, 0700, 0,
11794 remote_hostio_close (self
, fd
, &remote_errno
);
11796 ps
= packet_support (PACKET_vFile_open
);
11799 if (ps
== PACKET_DISABLE
)
11801 static int warning_issued
= 0;
11803 if (!warning_issued
)
11805 warning (_("remote target does not support file"
11806 " transfer, attempting to access files"
11807 " from local filesystem."));
11808 warning_issued
= 1;
11819 remote_fileio_errno_to_host (int errnum
)
11825 case FILEIO_ENOENT
:
11833 case FILEIO_EACCES
:
11835 case FILEIO_EFAULT
:
11839 case FILEIO_EEXIST
:
11841 case FILEIO_ENODEV
:
11843 case FILEIO_ENOTDIR
:
11845 case FILEIO_EISDIR
:
11847 case FILEIO_EINVAL
:
11849 case FILEIO_ENFILE
:
11851 case FILEIO_EMFILE
:
11855 case FILEIO_ENOSPC
:
11857 case FILEIO_ESPIPE
:
11861 case FILEIO_ENOSYS
:
11863 case FILEIO_ENAMETOOLONG
:
11864 return ENAMETOOLONG
;
11870 remote_hostio_error (int errnum
)
11872 int host_error
= remote_fileio_errno_to_host (errnum
);
11874 if (host_error
== -1)
11875 error (_("Unknown remote I/O error %d"), errnum
);
11877 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11881 remote_hostio_close_cleanup (void *opaque
)
11883 int fd
= *(int *) opaque
;
11886 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
11890 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
11892 struct cleanup
*back_to
, *close_cleanup
;
11893 int retcode
, fd
, remote_errno
, bytes
, io_size
;
11896 int bytes_in_buffer
;
11899 struct remote_state
*rs
= get_remote_state ();
11901 if (!rs
->remote_desc
)
11902 error (_("command can only be used with remote target"));
11904 file
= gdb_fopen_cloexec (local_file
, "rb");
11906 perror_with_name (local_file
);
11907 back_to
= make_cleanup_fclose (file
);
11909 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11910 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
11912 0700, 0, &remote_errno
);
11914 remote_hostio_error (remote_errno
);
11916 /* Send up to this many bytes at once. They won't all fit in the
11917 remote packet limit, so we'll transfer slightly fewer. */
11918 io_size
= get_remote_packet_size ();
11919 buffer
= (gdb_byte
*) xmalloc (io_size
);
11920 make_cleanup (xfree
, buffer
);
11922 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11924 bytes_in_buffer
= 0;
11927 while (bytes_in_buffer
|| !saw_eof
)
11931 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
11932 io_size
- bytes_in_buffer
,
11937 error (_("Error reading %s."), local_file
);
11940 /* EOF. Unless there is something still in the
11941 buffer from the last iteration, we are done. */
11943 if (bytes_in_buffer
== 0)
11951 bytes
+= bytes_in_buffer
;
11952 bytes_in_buffer
= 0;
11954 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
11956 offset
, &remote_errno
);
11959 remote_hostio_error (remote_errno
);
11960 else if (retcode
== 0)
11961 error (_("Remote write of %d bytes returned 0!"), bytes
);
11962 else if (retcode
< bytes
)
11964 /* Short write. Save the rest of the read data for the next
11966 bytes_in_buffer
= bytes
- retcode
;
11967 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
11973 discard_cleanups (close_cleanup
);
11974 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
11975 remote_hostio_error (remote_errno
);
11978 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
11979 do_cleanups (back_to
);
11983 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
11985 struct cleanup
*back_to
, *close_cleanup
;
11986 int fd
, remote_errno
, bytes
, io_size
;
11990 struct remote_state
*rs
= get_remote_state ();
11992 if (!rs
->remote_desc
)
11993 error (_("command can only be used with remote target"));
11995 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11996 remote_file
, FILEIO_O_RDONLY
, 0, 0,
11999 remote_hostio_error (remote_errno
);
12001 file
= gdb_fopen_cloexec (local_file
, "wb");
12003 perror_with_name (local_file
);
12004 back_to
= make_cleanup_fclose (file
);
12006 /* Send up to this many bytes at once. They won't all fit in the
12007 remote packet limit, so we'll transfer slightly fewer. */
12008 io_size
= get_remote_packet_size ();
12009 buffer
= (gdb_byte
*) xmalloc (io_size
);
12010 make_cleanup (xfree
, buffer
);
12012 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
12017 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
12018 fd
, buffer
, io_size
, offset
, &remote_errno
);
12020 /* Success, but no bytes, means end-of-file. */
12023 remote_hostio_error (remote_errno
);
12027 bytes
= fwrite (buffer
, 1, bytes
, file
);
12029 perror_with_name (local_file
);
12032 discard_cleanups (close_cleanup
);
12033 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
12034 remote_hostio_error (remote_errno
);
12037 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
12038 do_cleanups (back_to
);
12042 remote_file_delete (const char *remote_file
, int from_tty
)
12044 int retcode
, remote_errno
;
12045 struct remote_state
*rs
= get_remote_state ();
12047 if (!rs
->remote_desc
)
12048 error (_("command can only be used with remote target"));
12050 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
12051 NULL
, remote_file
, &remote_errno
);
12053 remote_hostio_error (remote_errno
);
12056 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
12060 remote_put_command (char *args
, int from_tty
)
12062 struct cleanup
*back_to
;
12066 error_no_arg (_("file to put"));
12068 argv
= gdb_buildargv (args
);
12069 back_to
= make_cleanup_freeargv (argv
);
12070 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12071 error (_("Invalid parameters to remote put"));
12073 remote_file_put (argv
[0], argv
[1], from_tty
);
12075 do_cleanups (back_to
);
12079 remote_get_command (char *args
, int from_tty
)
12081 struct cleanup
*back_to
;
12085 error_no_arg (_("file to get"));
12087 argv
= gdb_buildargv (args
);
12088 back_to
= make_cleanup_freeargv (argv
);
12089 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
12090 error (_("Invalid parameters to remote get"));
12092 remote_file_get (argv
[0], argv
[1], from_tty
);
12094 do_cleanups (back_to
);
12098 remote_delete_command (char *args
, int from_tty
)
12100 struct cleanup
*back_to
;
12104 error_no_arg (_("file to delete"));
12106 argv
= gdb_buildargv (args
);
12107 back_to
= make_cleanup_freeargv (argv
);
12108 if (argv
[0] == NULL
|| argv
[1] != NULL
)
12109 error (_("Invalid parameters to remote delete"));
12111 remote_file_delete (argv
[0], from_tty
);
12113 do_cleanups (back_to
);
12117 remote_command (char *args
, int from_tty
)
12119 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
12123 remote_can_execute_reverse (struct target_ops
*self
)
12125 if (packet_support (PACKET_bs
) == PACKET_ENABLE
12126 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
12133 remote_supports_non_stop (struct target_ops
*self
)
12139 remote_supports_disable_randomization (struct target_ops
*self
)
12141 /* Only supported in extended mode. */
12146 remote_supports_multi_process (struct target_ops
*self
)
12148 struct remote_state
*rs
= get_remote_state ();
12150 return remote_multi_process_p (rs
);
12154 remote_supports_cond_tracepoints (void)
12156 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
12160 remote_supports_cond_breakpoints (struct target_ops
*self
)
12162 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
12166 remote_supports_fast_tracepoints (void)
12168 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
12172 remote_supports_static_tracepoints (void)
12174 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
12178 remote_supports_install_in_trace (void)
12180 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
12184 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
12186 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
12191 remote_supports_string_tracing (struct target_ops
*self
)
12193 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
12197 remote_can_run_breakpoint_commands (struct target_ops
*self
)
12199 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
12203 remote_trace_init (struct target_ops
*self
)
12206 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12207 if (strcmp (target_buf
, "OK") != 0)
12208 error (_("Target does not support this command."));
12211 static void free_actions_list (char **actions_list
);
12212 static void free_actions_list_cleanup_wrapper (void *);
12214 free_actions_list_cleanup_wrapper (void *al
)
12216 free_actions_list ((char **) al
);
12220 free_actions_list (char **actions_list
)
12224 if (actions_list
== 0)
12227 for (ndx
= 0; actions_list
[ndx
]; ndx
++)
12228 xfree (actions_list
[ndx
]);
12230 xfree (actions_list
);
12233 /* Recursive routine to walk through command list including loops, and
12234 download packets for each command. */
12237 remote_download_command_source (int num
, ULONGEST addr
,
12238 struct command_line
*cmds
)
12240 struct remote_state
*rs
= get_remote_state ();
12241 struct command_line
*cmd
;
12243 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
12245 QUIT
; /* Allow user to bail out with ^C. */
12246 strcpy (rs
->buf
, "QTDPsrc:");
12247 encode_source_string (num
, addr
, "cmd", cmd
->line
,
12248 rs
->buf
+ strlen (rs
->buf
),
12249 rs
->buf_size
- strlen (rs
->buf
));
12251 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12252 if (strcmp (target_buf
, "OK"))
12253 warning (_("Target does not support source download."));
12255 if (cmd
->control_type
== while_control
12256 || cmd
->control_type
== while_stepping_control
)
12258 remote_download_command_source (num
, addr
, *cmd
->body_list
);
12260 QUIT
; /* Allow user to bail out with ^C. */
12261 strcpy (rs
->buf
, "QTDPsrc:");
12262 encode_source_string (num
, addr
, "cmd", "end",
12263 rs
->buf
+ strlen (rs
->buf
),
12264 rs
->buf_size
- strlen (rs
->buf
));
12266 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12267 if (strcmp (target_buf
, "OK"))
12268 warning (_("Target does not support source download."));
12274 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
12276 #define BUF_SIZE 2048
12280 char buf
[BUF_SIZE
];
12281 char **tdp_actions
;
12282 char **stepping_actions
;
12284 struct cleanup
*old_chain
= NULL
;
12286 struct breakpoint
*b
= loc
->owner
;
12287 struct tracepoint
*t
= (struct tracepoint
*) b
;
12289 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
12290 old_chain
= make_cleanup (free_actions_list_cleanup_wrapper
,
12292 (void) make_cleanup (free_actions_list_cleanup_wrapper
,
12295 tpaddr
= loc
->address
;
12296 sprintf_vma (addrbuf
, tpaddr
);
12297 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
12298 addrbuf
, /* address */
12299 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
12300 t
->step_count
, t
->pass_count
);
12301 /* Fast tracepoints are mostly handled by the target, but we can
12302 tell the target how big of an instruction block should be moved
12304 if (b
->type
== bp_fast_tracepoint
)
12306 /* Only test for support at download time; we may not know
12307 target capabilities at definition time. */
12308 if (remote_supports_fast_tracepoints ())
12310 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
12312 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
12313 gdb_insn_length (loc
->gdbarch
, tpaddr
));
12315 /* If it passed validation at definition but fails now,
12316 something is very wrong. */
12317 internal_error (__FILE__
, __LINE__
,
12318 _("Fast tracepoint not "
12319 "valid during download"));
12322 /* Fast tracepoints are functionally identical to regular
12323 tracepoints, so don't take lack of support as a reason to
12324 give up on the trace run. */
12325 warning (_("Target does not support fast tracepoints, "
12326 "downloading %d as regular tracepoint"), b
->number
);
12328 else if (b
->type
== bp_static_tracepoint
)
12330 /* Only test for support at download time; we may not know
12331 target capabilities at definition time. */
12332 if (remote_supports_static_tracepoints ())
12334 struct static_tracepoint_marker marker
;
12336 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
12337 strcat (buf
, ":S");
12339 error (_("Static tracepoint not valid during download"));
12342 /* Fast tracepoints are functionally identical to regular
12343 tracepoints, so don't take lack of support as a reason
12344 to give up on the trace run. */
12345 error (_("Target does not support static tracepoints"));
12347 /* If the tracepoint has a conditional, make it into an agent
12348 expression and append to the definition. */
12351 /* Only test support at download time, we may not know target
12352 capabilities at definition time. */
12353 if (remote_supports_cond_tracepoints ())
12355 agent_expr_up aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
.get ());
12356 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
12358 pkt
= buf
+ strlen (buf
);
12359 for (ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
12360 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
12364 warning (_("Target does not support conditional tracepoints, "
12365 "ignoring tp %d cond"), b
->number
);
12368 if (b
->commands
|| *default_collect
)
12371 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12372 if (strcmp (target_buf
, "OK"))
12373 error (_("Target does not support tracepoints."));
12375 /* do_single_steps (t); */
12378 for (ndx
= 0; tdp_actions
[ndx
]; ndx
++)
12380 QUIT
; /* Allow user to bail out with ^C. */
12381 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
12382 b
->number
, addrbuf
, /* address */
12384 ((tdp_actions
[ndx
+ 1] || stepping_actions
)
12387 remote_get_noisy_reply (&target_buf
,
12389 if (strcmp (target_buf
, "OK"))
12390 error (_("Error on target while setting tracepoints."));
12393 if (stepping_actions
)
12395 for (ndx
= 0; stepping_actions
[ndx
]; ndx
++)
12397 QUIT
; /* Allow user to bail out with ^C. */
12398 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12399 b
->number
, addrbuf
, /* address */
12400 ((ndx
== 0) ? "S" : ""),
12401 stepping_actions
[ndx
],
12402 (stepping_actions
[ndx
+ 1] ? "-" : ""));
12404 remote_get_noisy_reply (&target_buf
,
12406 if (strcmp (target_buf
, "OK"))
12407 error (_("Error on target while setting tracepoints."));
12411 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12413 if (b
->location
!= NULL
)
12415 strcpy (buf
, "QTDPsrc:");
12416 encode_source_string (b
->number
, loc
->address
, "at",
12417 event_location_to_string (b
->location
),
12418 buf
+ strlen (buf
), 2048 - strlen (buf
));
12420 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12421 if (strcmp (target_buf
, "OK"))
12422 warning (_("Target does not support source download."));
12424 if (b
->cond_string
)
12426 strcpy (buf
, "QTDPsrc:");
12427 encode_source_string (b
->number
, loc
->address
,
12428 "cond", b
->cond_string
, buf
+ strlen (buf
),
12429 2048 - strlen (buf
));
12431 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12432 if (strcmp (target_buf
, "OK"))
12433 warning (_("Target does not support source download."));
12435 remote_download_command_source (b
->number
, loc
->address
,
12436 breakpoint_commands (b
));
12439 do_cleanups (old_chain
);
12443 remote_can_download_tracepoint (struct target_ops
*self
)
12445 struct remote_state
*rs
= get_remote_state ();
12446 struct trace_status
*ts
;
12449 /* Don't try to install tracepoints until we've relocated our
12450 symbols, and fetched and merged the target's tracepoint list with
12452 if (rs
->starting_up
)
12455 ts
= current_trace_status ();
12456 status
= remote_get_trace_status (self
, ts
);
12458 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12461 /* If we are in a tracing experiment, but remote stub doesn't support
12462 installing tracepoint in trace, we have to return. */
12463 if (!remote_supports_install_in_trace ())
12471 remote_download_trace_state_variable (struct target_ops
*self
,
12472 struct trace_state_variable
*tsv
)
12474 struct remote_state
*rs
= get_remote_state ();
12477 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12478 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8),
12480 p
= rs
->buf
+ strlen (rs
->buf
);
12481 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
12482 error (_("Trace state variable name too long for tsv definition packet"));
12483 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, strlen (tsv
->name
));
12486 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12487 if (*target_buf
== '\0')
12488 error (_("Target does not support this command."));
12489 if (strcmp (target_buf
, "OK") != 0)
12490 error (_("Error on target while downloading trace state variable."));
12494 remote_enable_tracepoint (struct target_ops
*self
,
12495 struct bp_location
*location
)
12497 struct remote_state
*rs
= get_remote_state ();
12500 sprintf_vma (addr_buf
, location
->address
);
12501 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12502 location
->owner
->number
, addr_buf
);
12504 remote_get_noisy_reply (&rs
->buf
, &rs
->buf_size
);
12505 if (*rs
->buf
== '\0')
12506 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12507 if (strcmp (rs
->buf
, "OK") != 0)
12508 error (_("Error on target while enabling tracepoint."));
12512 remote_disable_tracepoint (struct target_ops
*self
,
12513 struct bp_location
*location
)
12515 struct remote_state
*rs
= get_remote_state ();
12518 sprintf_vma (addr_buf
, location
->address
);
12519 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12520 location
->owner
->number
, addr_buf
);
12522 remote_get_noisy_reply (&rs
->buf
, &rs
->buf_size
);
12523 if (*rs
->buf
== '\0')
12524 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12525 if (strcmp (rs
->buf
, "OK") != 0)
12526 error (_("Error on target while disabling tracepoint."));
12530 remote_trace_set_readonly_regions (struct target_ops
*self
)
12534 bfd_size_type size
;
12540 return; /* No information to give. */
12542 strcpy (target_buf
, "QTro");
12543 offset
= strlen (target_buf
);
12544 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12546 char tmp1
[40], tmp2
[40];
12549 if ((s
->flags
& SEC_LOAD
) == 0 ||
12550 /* (s->flags & SEC_CODE) == 0 || */
12551 (s
->flags
& SEC_READONLY
) == 0)
12555 vma
= bfd_get_section_vma (abfd
, s
);
12556 size
= bfd_get_section_size (s
);
12557 sprintf_vma (tmp1
, vma
);
12558 sprintf_vma (tmp2
, vma
+ size
);
12559 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12560 if (offset
+ sec_length
+ 1 > target_buf_size
)
12562 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12564 Too many sections for read-only sections definition packet."));
12567 xsnprintf (target_buf
+ offset
, target_buf_size
- offset
, ":%s,%s",
12569 offset
+= sec_length
;
12573 putpkt (target_buf
);
12574 getpkt (&target_buf
, &target_buf_size
, 0);
12579 remote_trace_start (struct target_ops
*self
)
12581 putpkt ("QTStart");
12582 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12583 if (*target_buf
== '\0')
12584 error (_("Target does not support this command."));
12585 if (strcmp (target_buf
, "OK") != 0)
12586 error (_("Bogus reply from target: %s"), target_buf
);
12590 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12592 /* Initialize it just to avoid a GCC false warning. */
12594 /* FIXME we need to get register block size some other way. */
12595 extern int trace_regblock_size
;
12596 enum packet_result result
;
12598 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12601 trace_regblock_size
= get_remote_arch_state ()->sizeof_g_packet
;
12603 putpkt ("qTStatus");
12607 p
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12609 CATCH (ex
, RETURN_MASK_ERROR
)
12611 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12613 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12616 throw_exception (ex
);
12620 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12622 /* If the remote target doesn't do tracing, flag it. */
12623 if (result
== PACKET_UNKNOWN
)
12626 /* We're working with a live target. */
12627 ts
->filename
= NULL
;
12630 error (_("Bogus trace status reply from target: %s"), target_buf
);
12632 /* Function 'parse_trace_status' sets default value of each field of
12633 'ts' at first, so we don't have to do it here. */
12634 parse_trace_status (p
, ts
);
12636 return ts
->running
;
12640 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12641 struct uploaded_tp
*utp
)
12643 struct remote_state
*rs
= get_remote_state ();
12645 struct bp_location
*loc
;
12646 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12647 size_t size
= get_remote_packet_size ();
12651 tp
->base
.hit_count
= 0;
12652 tp
->traceframe_usage
= 0;
12653 for (loc
= tp
->base
.loc
; loc
; loc
= loc
->next
)
12655 /* If the tracepoint was never downloaded, don't go asking for
12657 if (tp
->number_on_target
== 0)
12659 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12660 phex_nz (loc
->address
, 0));
12662 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12663 if (reply
&& *reply
)
12666 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12672 utp
->hit_count
= 0;
12673 utp
->traceframe_usage
= 0;
12674 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12675 phex_nz (utp
->addr
, 0));
12677 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12678 if (reply
&& *reply
)
12681 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12687 remote_trace_stop (struct target_ops
*self
)
12690 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12691 if (*target_buf
== '\0')
12692 error (_("Target does not support this command."));
12693 if (strcmp (target_buf
, "OK") != 0)
12694 error (_("Bogus reply from target: %s"), target_buf
);
12698 remote_trace_find (struct target_ops
*self
,
12699 enum trace_find_type type
, int num
,
12700 CORE_ADDR addr1
, CORE_ADDR addr2
,
12703 struct remote_state
*rs
= get_remote_state ();
12704 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12706 int target_frameno
= -1, target_tracept
= -1;
12708 /* Lookups other than by absolute frame number depend on the current
12709 trace selected, so make sure it is correct on the remote end
12711 if (type
!= tfind_number
)
12712 set_remote_traceframe ();
12715 strcpy (p
, "QTFrame:");
12716 p
= strchr (p
, '\0');
12720 xsnprintf (p
, endbuf
- p
, "%x", num
);
12723 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12726 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12729 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12730 phex_nz (addr2
, 0));
12732 case tfind_outside
:
12733 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12734 phex_nz (addr2
, 0));
12737 error (_("Unknown trace find type %d"), type
);
12741 reply
= remote_get_noisy_reply (&(rs
->buf
), &rs
->buf_size
);
12742 if (*reply
== '\0')
12743 error (_("Target does not support this command."));
12745 while (reply
&& *reply
)
12750 target_frameno
= (int) strtol (p
, &reply
, 16);
12752 error (_("Unable to parse trace frame number"));
12753 /* Don't update our remote traceframe number cache on failure
12754 to select a remote traceframe. */
12755 if (target_frameno
== -1)
12760 target_tracept
= (int) strtol (p
, &reply
, 16);
12762 error (_("Unable to parse tracepoint number"));
12764 case 'O': /* "OK"? */
12765 if (reply
[1] == 'K' && reply
[2] == '\0')
12768 error (_("Bogus reply from target: %s"), reply
);
12771 error (_("Bogus reply from target: %s"), reply
);
12774 *tpp
= target_tracept
;
12776 rs
->remote_traceframe_number
= target_frameno
;
12777 return target_frameno
;
12781 remote_get_trace_state_variable_value (struct target_ops
*self
,
12782 int tsvnum
, LONGEST
*val
)
12784 struct remote_state
*rs
= get_remote_state ();
12788 set_remote_traceframe ();
12790 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12792 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12793 if (reply
&& *reply
)
12797 unpack_varlen_hex (reply
+ 1, &uval
);
12798 *val
= (LONGEST
) uval
;
12806 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12808 struct remote_state
*rs
= get_remote_state ();
12812 strcpy (p
, "QTSave:");
12814 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12815 error (_("Remote file name too long for trace save packet"));
12816 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12819 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12820 if (*reply
== '\0')
12821 error (_("Target does not support this command."));
12822 if (strcmp (reply
, "OK") != 0)
12823 error (_("Bogus reply from target: %s"), reply
);
12827 /* This is basically a memory transfer, but needs to be its own packet
12828 because we don't know how the target actually organizes its trace
12829 memory, plus we want to be able to ask for as much as possible, but
12830 not be unhappy if we don't get as much as we ask for. */
12833 remote_get_raw_trace_data (struct target_ops
*self
,
12834 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12836 struct remote_state
*rs
= get_remote_state ();
12842 strcpy (p
, "qTBuffer:");
12844 p
+= hexnumstr (p
, offset
);
12846 p
+= hexnumstr (p
, len
);
12850 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12851 if (reply
&& *reply
)
12853 /* 'l' by itself means we're at the end of the buffer and
12854 there is nothing more to get. */
12858 /* Convert the reply into binary. Limit the number of bytes to
12859 convert according to our passed-in buffer size, rather than
12860 what was returned in the packet; if the target is
12861 unexpectedly generous and gives us a bigger reply than we
12862 asked for, we don't want to crash. */
12863 rslt
= hex2bin (target_buf
, buf
, len
);
12867 /* Something went wrong, flag as an error. */
12872 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12874 struct remote_state
*rs
= get_remote_state ();
12876 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12880 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12882 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12883 if (*reply
== '\0')
12884 error (_("Target does not support this command."));
12885 if (strcmp (reply
, "OK") != 0)
12886 error (_("Bogus reply from target: %s"), reply
);
12889 warning (_("Target does not support disconnected tracing."));
12893 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12895 struct thread_info
*info
= find_thread_ptid (ptid
);
12897 if (info
&& info
->priv
)
12898 return info
->priv
->core
;
12903 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12905 struct remote_state
*rs
= get_remote_state ();
12908 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12910 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12911 if (*reply
== '\0')
12912 error (_("Target does not support this command."));
12913 if (strcmp (reply
, "OK") != 0)
12914 error (_("Bogus reply from target: %s"), reply
);
12917 static struct traceframe_info
*
12918 remote_traceframe_info (struct target_ops
*self
)
12922 text
= target_read_stralloc (¤t_target
,
12923 TARGET_OBJECT_TRACEFRAME_INFO
, NULL
);
12926 struct traceframe_info
*info
;
12927 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
12929 info
= parse_traceframe_info (text
);
12930 do_cleanups (back_to
);
12937 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12938 instruction on which a fast tracepoint may be placed. Returns -1
12939 if the packet is not supported, and 0 if the minimum instruction
12940 length is unknown. */
12943 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
12945 struct remote_state
*rs
= get_remote_state ();
12948 /* If we're not debugging a process yet, the IPA can't be
12950 if (!target_has_execution
)
12953 /* Make sure the remote is pointing at the right process. */
12954 set_general_process ();
12956 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
12958 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12959 if (*reply
== '\0')
12963 ULONGEST min_insn_len
;
12965 unpack_varlen_hex (reply
, &min_insn_len
);
12967 return (int) min_insn_len
;
12972 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
12974 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
12976 struct remote_state
*rs
= get_remote_state ();
12977 char *buf
= rs
->buf
;
12978 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12979 enum packet_result result
;
12981 gdb_assert (val
>= 0 || val
== -1);
12982 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
12983 /* Send -1 as literal "-1" to avoid host size dependency. */
12987 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
12990 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
12993 remote_get_noisy_reply (&rs
->buf
, &rs
->buf_size
);
12994 result
= packet_ok (rs
->buf
,
12995 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
12997 if (result
!= PACKET_OK
)
12998 warning (_("Bogus reply from target: %s"), rs
->buf
);
13003 remote_set_trace_notes (struct target_ops
*self
,
13004 const char *user
, const char *notes
,
13005 const char *stop_notes
)
13007 struct remote_state
*rs
= get_remote_state ();
13009 char *buf
= rs
->buf
;
13010 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13013 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
13016 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
13017 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
13023 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
13024 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
13030 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
13031 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
13035 /* Ensure the buffer is terminated. */
13039 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
13040 if (*reply
== '\0')
13043 if (strcmp (reply
, "OK") != 0)
13044 error (_("Bogus reply from target: %s"), reply
);
13050 remote_use_agent (struct target_ops
*self
, int use
)
13052 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
13054 struct remote_state
*rs
= get_remote_state ();
13056 /* If the stub supports QAgent. */
13057 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
13059 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13061 if (strcmp (rs
->buf
, "OK") == 0)
13072 remote_can_use_agent (struct target_ops
*self
)
13074 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
13077 struct btrace_target_info
13079 /* The ptid of the traced thread. */
13082 /* The obtained branch trace configuration. */
13083 struct btrace_config conf
;
13086 /* Reset our idea of our target's btrace configuration. */
13089 remote_btrace_reset (void)
13091 struct remote_state
*rs
= get_remote_state ();
13093 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
13096 /* Check whether the target supports branch tracing. */
13099 remote_supports_btrace (struct target_ops
*self
, enum btrace_format format
)
13101 if (packet_support (PACKET_Qbtrace_off
) != PACKET_ENABLE
)
13103 if (packet_support (PACKET_qXfer_btrace
) != PACKET_ENABLE
)
13108 case BTRACE_FORMAT_NONE
:
13111 case BTRACE_FORMAT_BTS
:
13112 return (packet_support (PACKET_Qbtrace_bts
) == PACKET_ENABLE
);
13114 case BTRACE_FORMAT_PT
:
13115 /* The trace is decoded on the host. Even if our target supports it,
13116 we still need to have libipt to decode the trace. */
13117 #if defined (HAVE_LIBIPT)
13118 return (packet_support (PACKET_Qbtrace_pt
) == PACKET_ENABLE
);
13119 #else /* !defined (HAVE_LIBIPT) */
13121 #endif /* !defined (HAVE_LIBIPT) */
13124 internal_error (__FILE__
, __LINE__
, _("Unknown branch trace format"));
13127 /* Synchronize the configuration with the target. */
13130 btrace_sync_conf (const struct btrace_config
*conf
)
13132 struct packet_config
*packet
;
13133 struct remote_state
*rs
;
13134 char *buf
, *pos
, *endbuf
;
13136 rs
= get_remote_state ();
13138 endbuf
= buf
+ get_remote_packet_size ();
13140 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
13141 if (packet_config_support (packet
) == PACKET_ENABLE
13142 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
13145 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13149 getpkt (&buf
, &rs
->buf_size
, 0);
13151 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13153 if (buf
[0] == 'E' && buf
[1] == '.')
13154 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
13156 error (_("Failed to configure the BTS buffer size."));
13159 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
13162 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
13163 if (packet_config_support (packet
) == PACKET_ENABLE
13164 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
13167 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
13171 getpkt (&buf
, &rs
->buf_size
, 0);
13173 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
13175 if (buf
[0] == 'E' && buf
[1] == '.')
13176 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
13178 error (_("Failed to configure the trace buffer size."));
13181 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
13185 /* Read the current thread's btrace configuration from the target and
13186 store it into CONF. */
13189 btrace_read_config (struct btrace_config
*conf
)
13193 xml
= target_read_stralloc (¤t_target
,
13194 TARGET_OBJECT_BTRACE_CONF
, "");
13197 struct cleanup
*cleanup
;
13199 cleanup
= make_cleanup (xfree
, xml
);
13200 parse_xml_btrace_conf (conf
, xml
);
13201 do_cleanups (cleanup
);
13205 /* Maybe reopen target btrace. */
13208 remote_btrace_maybe_reopen (void)
13210 struct remote_state
*rs
= get_remote_state ();
13211 struct cleanup
*cleanup
;
13212 struct thread_info
*tp
;
13213 int btrace_target_pushed
= 0;
13216 cleanup
= make_cleanup_restore_current_thread ();
13217 ALL_NON_EXITED_THREADS (tp
)
13219 set_general_thread (tp
->ptid
);
13221 memset (&rs
->btrace_config
, 0x00, sizeof (struct btrace_config
));
13222 btrace_read_config (&rs
->btrace_config
);
13224 if (rs
->btrace_config
.format
== BTRACE_FORMAT_NONE
)
13227 #if !defined (HAVE_LIBIPT)
13228 if (rs
->btrace_config
.format
== BTRACE_FORMAT_PT
)
13233 warning (_("GDB does not support Intel Processor Trace. "
13234 "\"record\" will not work in this session."));
13239 #endif /* !defined (HAVE_LIBIPT) */
13241 /* Push target, once, but before anything else happens. This way our
13242 changes to the threads will be cleaned up by unpushing the target
13243 in case btrace_read_config () throws. */
13244 if (!btrace_target_pushed
)
13246 btrace_target_pushed
= 1;
13247 record_btrace_push_target ();
13248 printf_filtered (_("Target is recording using %s.\n"),
13249 btrace_format_string (rs
->btrace_config
.format
));
13252 tp
->btrace
.target
= XCNEW (struct btrace_target_info
);
13253 tp
->btrace
.target
->ptid
= tp
->ptid
;
13254 tp
->btrace
.target
->conf
= rs
->btrace_config
;
13256 do_cleanups (cleanup
);
13259 /* Enable branch tracing. */
13261 static struct btrace_target_info
*
13262 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
13263 const struct btrace_config
*conf
)
13265 struct btrace_target_info
*tinfo
= NULL
;
13266 struct packet_config
*packet
= NULL
;
13267 struct remote_state
*rs
= get_remote_state ();
13268 char *buf
= rs
->buf
;
13269 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13271 switch (conf
->format
)
13273 case BTRACE_FORMAT_BTS
:
13274 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
13277 case BTRACE_FORMAT_PT
:
13278 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
13282 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
13283 error (_("Target does not support branch tracing."));
13285 btrace_sync_conf (conf
);
13287 set_general_thread (ptid
);
13289 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13291 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13293 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13295 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13296 error (_("Could not enable branch tracing for %s: %s"),
13297 target_pid_to_str (ptid
), rs
->buf
+ 2);
13299 error (_("Could not enable branch tracing for %s."),
13300 target_pid_to_str (ptid
));
13303 tinfo
= XCNEW (struct btrace_target_info
);
13304 tinfo
->ptid
= ptid
;
13306 /* If we fail to read the configuration, we lose some information, but the
13307 tracing itself is not impacted. */
13310 btrace_read_config (&tinfo
->conf
);
13312 CATCH (err
, RETURN_MASK_ERROR
)
13314 if (err
.message
!= NULL
)
13315 warning ("%s", err
.message
);
13322 /* Disable branch tracing. */
13325 remote_disable_btrace (struct target_ops
*self
,
13326 struct btrace_target_info
*tinfo
)
13328 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
13329 struct remote_state
*rs
= get_remote_state ();
13330 char *buf
= rs
->buf
;
13331 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
13333 if (packet_config_support (packet
) != PACKET_ENABLE
)
13334 error (_("Target does not support branch tracing."));
13336 set_general_thread (tinfo
->ptid
);
13338 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
13340 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13342 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
13344 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
13345 error (_("Could not disable branch tracing for %s: %s"),
13346 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
13348 error (_("Could not disable branch tracing for %s."),
13349 target_pid_to_str (tinfo
->ptid
));
13355 /* Teardown branch tracing. */
13358 remote_teardown_btrace (struct target_ops
*self
,
13359 struct btrace_target_info
*tinfo
)
13361 /* We must not talk to the target during teardown. */
13365 /* Read the branch trace. */
13367 static enum btrace_error
13368 remote_read_btrace (struct target_ops
*self
,
13369 struct btrace_data
*btrace
,
13370 struct btrace_target_info
*tinfo
,
13371 enum btrace_read_type type
)
13373 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
13374 struct cleanup
*cleanup
;
13378 if (packet_config_support (packet
) != PACKET_ENABLE
)
13379 error (_("Target does not support branch tracing."));
13381 #if !defined(HAVE_LIBEXPAT)
13382 error (_("Cannot process branch tracing result. XML parsing not supported."));
13387 case BTRACE_READ_ALL
:
13390 case BTRACE_READ_NEW
:
13393 case BTRACE_READ_DELTA
:
13397 internal_error (__FILE__
, __LINE__
,
13398 _("Bad branch tracing read type: %u."),
13399 (unsigned int) type
);
13402 xml
= target_read_stralloc (¤t_target
,
13403 TARGET_OBJECT_BTRACE
, annex
);
13405 return BTRACE_ERR_UNKNOWN
;
13407 cleanup
= make_cleanup (xfree
, xml
);
13408 parse_xml_btrace (btrace
, xml
);
13409 do_cleanups (cleanup
);
13411 return BTRACE_ERR_NONE
;
13414 static const struct btrace_config
*
13415 remote_btrace_conf (struct target_ops
*self
,
13416 const struct btrace_target_info
*tinfo
)
13418 return &tinfo
->conf
;
13422 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
13424 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
13428 /* Implementation of to_load. */
13431 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
13433 generic_load (name
, from_tty
);
13436 /* Accepts an integer PID; returns a string representing a file that
13437 can be opened on the remote side to get the symbols for the child
13438 process. Returns NULL if the operation is not supported. */
13441 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13443 static char *filename
= NULL
;
13444 struct inferior
*inf
;
13445 char *annex
= NULL
;
13447 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13450 if (filename
!= NULL
)
13453 inf
= find_inferior_pid (pid
);
13455 internal_error (__FILE__
, __LINE__
,
13456 _("not currently attached to process %d"), pid
);
13458 if (!inf
->fake_pid_p
)
13460 const int annex_size
= 9;
13462 annex
= (char *) alloca (annex_size
);
13463 xsnprintf (annex
, annex_size
, "%x", pid
);
13466 filename
= target_read_stralloc (¤t_target
,
13467 TARGET_OBJECT_EXEC_FILE
, annex
);
13472 /* Implement the to_can_do_single_step target_ops method. */
13475 remote_can_do_single_step (struct target_ops
*ops
)
13477 /* We can only tell whether target supports single step or not by
13478 supported s and S vCont actions if the stub supports vContSupported
13479 feature. If the stub doesn't support vContSupported feature,
13480 we have conservatively to think target doesn't supports single
13482 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13484 struct remote_state
*rs
= get_remote_state ();
13486 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13487 remote_vcont_probe (rs
);
13489 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13495 /* Implementation of the to_execution_direction method for the remote
13498 static enum exec_direction_kind
13499 remote_execution_direction (struct target_ops
*self
)
13501 struct remote_state
*rs
= get_remote_state ();
13503 return rs
->last_resume_exec_dir
;
13507 init_remote_ops (void)
13509 remote_ops
.to_shortname
= "remote";
13510 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13511 remote_ops
.to_doc
=
13512 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13513 Specify the serial device it is connected to\n\
13514 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13515 remote_ops
.to_open
= remote_open
;
13516 remote_ops
.to_close
= remote_close
;
13517 remote_ops
.to_detach
= remote_detach
;
13518 remote_ops
.to_disconnect
= remote_disconnect
;
13519 remote_ops
.to_resume
= remote_resume
;
13520 remote_ops
.to_commit_resume
= remote_commit_resume
;
13521 remote_ops
.to_wait
= remote_wait
;
13522 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13523 remote_ops
.to_store_registers
= remote_store_registers
;
13524 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13525 remote_ops
.to_files_info
= remote_files_info
;
13526 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13527 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13528 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13529 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13530 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13531 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13532 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13533 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13534 remote_ops
.to_watchpoint_addr_within_range
=
13535 remote_watchpoint_addr_within_range
;
13536 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13537 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13538 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13539 remote_ops
.to_region_ok_for_hw_watchpoint
13540 = remote_region_ok_for_hw_watchpoint
;
13541 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13542 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13543 remote_ops
.to_kill
= remote_kill
;
13544 remote_ops
.to_load
= remote_load
;
13545 remote_ops
.to_mourn_inferior
= remote_mourn
;
13546 remote_ops
.to_pass_signals
= remote_pass_signals
;
13547 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13548 remote_ops
.to_program_signals
= remote_program_signals
;
13549 remote_ops
.to_thread_alive
= remote_thread_alive
;
13550 remote_ops
.to_thread_name
= remote_thread_name
;
13551 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13552 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13553 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13554 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13555 remote_ops
.to_stop
= remote_stop
;
13556 remote_ops
.to_interrupt
= remote_interrupt
;
13557 remote_ops
.to_pass_ctrlc
= remote_pass_ctrlc
;
13558 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13559 remote_ops
.to_get_memory_xfer_limit
= remote_get_memory_xfer_limit
;
13560 remote_ops
.to_rcmd
= remote_rcmd
;
13561 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13562 remote_ops
.to_log_command
= serial_log_command
;
13563 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13564 remote_ops
.to_stratum
= process_stratum
;
13565 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13566 remote_ops
.to_has_memory
= default_child_has_memory
;
13567 remote_ops
.to_has_stack
= default_child_has_stack
;
13568 remote_ops
.to_has_registers
= default_child_has_registers
;
13569 remote_ops
.to_has_execution
= default_child_has_execution
;
13570 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13571 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13572 remote_ops
.to_magic
= OPS_MAGIC
;
13573 remote_ops
.to_memory_map
= remote_memory_map
;
13574 remote_ops
.to_flash_erase
= remote_flash_erase
;
13575 remote_ops
.to_flash_done
= remote_flash_done
;
13576 remote_ops
.to_read_description
= remote_read_description
;
13577 remote_ops
.to_search_memory
= remote_search_memory
;
13578 remote_ops
.to_can_async_p
= remote_can_async_p
;
13579 remote_ops
.to_is_async_p
= remote_is_async_p
;
13580 remote_ops
.to_async
= remote_async
;
13581 remote_ops
.to_thread_events
= remote_thread_events
;
13582 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13583 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13584 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13585 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13586 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13587 remote_ops
.to_supports_disable_randomization
13588 = remote_supports_disable_randomization
;
13589 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13590 remote_ops
.to_fileio_open
= remote_hostio_open
;
13591 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13592 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13593 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13594 remote_ops
.to_fileio_close
= remote_hostio_close
;
13595 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13596 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13597 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13598 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13599 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13600 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13601 remote_ops
.to_trace_init
= remote_trace_init
;
13602 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13603 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13604 remote_ops
.to_download_trace_state_variable
13605 = remote_download_trace_state_variable
;
13606 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13607 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13608 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13609 remote_ops
.to_trace_start
= remote_trace_start
;
13610 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13611 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13612 remote_ops
.to_trace_stop
= remote_trace_stop
;
13613 remote_ops
.to_trace_find
= remote_trace_find
;
13614 remote_ops
.to_get_trace_state_variable_value
13615 = remote_get_trace_state_variable_value
;
13616 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13617 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13618 remote_ops
.to_upload_trace_state_variables
13619 = remote_upload_trace_state_variables
;
13620 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13621 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13622 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13623 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13624 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13625 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13626 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13627 remote_ops
.to_verify_memory
= remote_verify_memory
;
13628 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13629 remote_ops
.to_set_permissions
= remote_set_permissions
;
13630 remote_ops
.to_static_tracepoint_marker_at
13631 = remote_static_tracepoint_marker_at
;
13632 remote_ops
.to_static_tracepoint_markers_by_strid
13633 = remote_static_tracepoint_markers_by_strid
;
13634 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13635 remote_ops
.to_use_agent
= remote_use_agent
;
13636 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13637 remote_ops
.to_supports_btrace
= remote_supports_btrace
;
13638 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13639 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13640 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13641 remote_ops
.to_read_btrace
= remote_read_btrace
;
13642 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13643 remote_ops
.to_augmented_libraries_svr4_read
=
13644 remote_augmented_libraries_svr4_read
;
13645 remote_ops
.to_follow_fork
= remote_follow_fork
;
13646 remote_ops
.to_follow_exec
= remote_follow_exec
;
13647 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13648 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13649 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13650 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13651 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13652 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13653 remote_ops
.to_execution_direction
= remote_execution_direction
;
13656 /* Set up the extended remote vector by making a copy of the standard
13657 remote vector and adding to it. */
13660 init_extended_remote_ops (void)
13662 extended_remote_ops
= remote_ops
;
13664 extended_remote_ops
.to_shortname
= "extended-remote";
13665 extended_remote_ops
.to_longname
=
13666 "Extended remote serial target in gdb-specific protocol";
13667 extended_remote_ops
.to_doc
=
13668 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13669 Specify the serial device it is connected to (e.g. /dev/ttya).";
13670 extended_remote_ops
.to_open
= extended_remote_open
;
13671 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13672 extended_remote_ops
.to_detach
= extended_remote_detach
;
13673 extended_remote_ops
.to_attach
= extended_remote_attach
;
13674 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13675 extended_remote_ops
.to_supports_disable_randomization
13676 = extended_remote_supports_disable_randomization
;
13680 remote_can_async_p (struct target_ops
*ops
)
13682 struct remote_state
*rs
= get_remote_state ();
13684 /* We don't go async if the user has explicitly prevented it with the
13685 "maint set target-async" command. */
13686 if (!target_async_permitted
)
13689 /* We're async whenever the serial device is. */
13690 return serial_can_async_p (rs
->remote_desc
);
13694 remote_is_async_p (struct target_ops
*ops
)
13696 struct remote_state
*rs
= get_remote_state ();
13698 if (!target_async_permitted
)
13699 /* We only enable async when the user specifically asks for it. */
13702 /* We're async whenever the serial device is. */
13703 return serial_is_async_p (rs
->remote_desc
);
13706 /* Pass the SERIAL event on and up to the client. One day this code
13707 will be able to delay notifying the client of an event until the
13708 point where an entire packet has been received. */
13710 static serial_event_ftype remote_async_serial_handler
;
13713 remote_async_serial_handler (struct serial
*scb
, void *context
)
13715 /* Don't propogate error information up to the client. Instead let
13716 the client find out about the error by querying the target. */
13717 inferior_event_handler (INF_REG_EVENT
, NULL
);
13721 remote_async_inferior_event_handler (gdb_client_data data
)
13723 inferior_event_handler (INF_REG_EVENT
, NULL
);
13727 remote_async (struct target_ops
*ops
, int enable
)
13729 struct remote_state
*rs
= get_remote_state ();
13733 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13735 /* If there are pending events in the stop reply queue tell the
13736 event loop to process them. */
13737 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13738 mark_async_event_handler (remote_async_inferior_event_token
);
13739 /* For simplicity, below we clear the pending events token
13740 without remembering whether it is marked, so here we always
13741 mark it. If there's actually no pending notification to
13742 process, this ends up being a no-op (other than a spurious
13743 event-loop wakeup). */
13744 if (target_is_non_stop_p ())
13745 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13749 serial_async (rs
->remote_desc
, NULL
, NULL
);
13750 /* If the core is disabling async, it doesn't want to be
13751 disturbed with target events. Clear all async event sources
13753 clear_async_event_handler (remote_async_inferior_event_token
);
13754 if (target_is_non_stop_p ())
13755 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13759 /* Implementation of the to_thread_events method. */
13762 remote_thread_events (struct target_ops
*ops
, int enable
)
13764 struct remote_state
*rs
= get_remote_state ();
13765 size_t size
= get_remote_packet_size ();
13767 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13770 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13772 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13774 switch (packet_ok (rs
->buf
,
13775 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13778 if (strcmp (rs
->buf
, "OK") != 0)
13779 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13782 warning (_("Remote failure reply: %s"), rs
->buf
);
13784 case PACKET_UNKNOWN
:
13790 set_remote_cmd (char *args
, int from_tty
)
13792 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13796 show_remote_cmd (char *args
, int from_tty
)
13798 /* We can't just use cmd_show_list here, because we want to skip
13799 the redundant "show remote Z-packet" and the legacy aliases. */
13800 struct cleanup
*showlist_chain
;
13801 struct cmd_list_element
*list
= remote_show_cmdlist
;
13802 struct ui_out
*uiout
= current_uiout
;
13804 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
13805 for (; list
!= NULL
; list
= list
->next
)
13806 if (strcmp (list
->name
, "Z-packet") == 0)
13808 else if (list
->type
== not_set_cmd
)
13809 /* Alias commands are exactly like the original, except they
13810 don't have the normal type. */
13814 struct cleanup
*option_chain
13815 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
13817 uiout
->field_string ("name", list
->name
);
13818 uiout
->text (": ");
13819 if (list
->type
== show_cmd
)
13820 do_show_command (NULL
, from_tty
, list
);
13822 cmd_func (list
, NULL
, from_tty
);
13823 /* Close the tuple. */
13824 do_cleanups (option_chain
);
13827 /* Close the tuple. */
13828 do_cleanups (showlist_chain
);
13832 /* Function to be called whenever a new objfile (shlib) is detected. */
13834 remote_new_objfile (struct objfile
*objfile
)
13836 struct remote_state
*rs
= get_remote_state ();
13838 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13839 remote_check_symbols ();
13842 /* Pull all the tracepoints defined on the target and create local
13843 data structures representing them. We don't want to create real
13844 tracepoints yet, we don't want to mess up the user's existing
13848 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13850 struct remote_state
*rs
= get_remote_state ();
13853 /* Ask for a first packet of tracepoint definition. */
13855 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13857 while (*p
&& *p
!= 'l')
13859 parse_tracepoint_definition (p
, utpp
);
13860 /* Ask for another packet of tracepoint definition. */
13862 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13869 remote_upload_trace_state_variables (struct target_ops
*self
,
13870 struct uploaded_tsv
**utsvp
)
13872 struct remote_state
*rs
= get_remote_state ();
13875 /* Ask for a first packet of variable definition. */
13877 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13879 while (*p
&& *p
!= 'l')
13881 parse_tsv_definition (p
, utsvp
);
13882 /* Ask for another packet of variable definition. */
13884 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13890 /* The "set/show range-stepping" show hook. */
13893 show_range_stepping (struct ui_file
*file
, int from_tty
,
13894 struct cmd_list_element
*c
,
13897 fprintf_filtered (file
,
13898 _("Debugger's willingness to use range stepping "
13899 "is %s.\n"), value
);
13902 /* The "set/show range-stepping" set hook. */
13905 set_range_stepping (char *ignore_args
, int from_tty
,
13906 struct cmd_list_element
*c
)
13908 struct remote_state
*rs
= get_remote_state ();
13910 /* Whene enabling, check whether range stepping is actually
13911 supported by the target, and warn if not. */
13912 if (use_range_stepping
)
13914 if (rs
->remote_desc
!= NULL
)
13916 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13917 remote_vcont_probe (rs
);
13919 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13920 && rs
->supports_vCont
.r
)
13924 warning (_("Range stepping is not supported by the current target"));
13929 _initialize_remote (void)
13931 struct cmd_list_element
*cmd
;
13932 const char *cmd_name
;
13934 /* architecture specific data */
13935 remote_gdbarch_data_handle
=
13936 gdbarch_data_register_post_init (init_remote_state
);
13937 remote_g_packet_data_handle
=
13938 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
13941 = register_program_space_data_with_cleanup (NULL
,
13942 remote_pspace_data_cleanup
);
13944 /* Initialize the per-target state. At the moment there is only one
13945 of these, not one per target. Only one target is active at a
13947 remote_state
= new_remote_state ();
13949 init_remote_ops ();
13950 add_target (&remote_ops
);
13952 init_extended_remote_ops ();
13953 add_target (&extended_remote_ops
);
13955 /* Hook into new objfile notification. */
13956 observer_attach_new_objfile (remote_new_objfile
);
13957 /* We're no longer interested in notification events of an inferior
13959 observer_attach_inferior_exit (discard_pending_stop_replies
);
13962 init_remote_threadtests ();
13965 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
13966 /* set/show remote ... */
13968 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
13969 Remote protocol specific variables\n\
13970 Configure various remote-protocol specific variables such as\n\
13971 the packets being used"),
13972 &remote_set_cmdlist
, "set remote ",
13973 0 /* allow-unknown */, &setlist
);
13974 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
13975 Remote protocol specific variables\n\
13976 Configure various remote-protocol specific variables such as\n\
13977 the packets being used"),
13978 &remote_show_cmdlist
, "show remote ",
13979 0 /* allow-unknown */, &showlist
);
13981 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
13982 Compare section data on target to the exec file.\n\
13983 Argument is a single section name (default: all loaded sections).\n\
13984 To compare only read-only loaded sections, specify the -r option."),
13987 add_cmd ("packet", class_maintenance
, packet_command
, _("\
13988 Send an arbitrary packet to a remote target.\n\
13989 maintenance packet TEXT\n\
13990 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13991 this command sends the string TEXT to the inferior, and displays the\n\
13992 response packet. GDB supplies the initial `$' character, and the\n\
13993 terminating `#' character and checksum."),
13996 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
13997 Set whether to send break if interrupted."), _("\
13998 Show whether to send break if interrupted."), _("\
13999 If set, a break, instead of a cntrl-c, is sent to the remote target."),
14000 set_remotebreak
, show_remotebreak
,
14001 &setlist
, &showlist
);
14002 cmd_name
= "remotebreak";
14003 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
14004 deprecate_cmd (cmd
, "set remote interrupt-sequence");
14005 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
14006 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
14007 deprecate_cmd (cmd
, "show remote interrupt-sequence");
14009 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
14010 interrupt_sequence_modes
, &interrupt_sequence_mode
,
14012 Set interrupt sequence to remote target."), _("\
14013 Show interrupt sequence to remote target."), _("\
14014 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
14015 NULL
, show_interrupt_sequence
,
14016 &remote_set_cmdlist
,
14017 &remote_show_cmdlist
);
14019 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
14020 &interrupt_on_connect
, _("\
14021 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14022 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
14023 If set, interrupt sequence is sent to remote target."),
14025 &remote_set_cmdlist
, &remote_show_cmdlist
);
14027 /* Install commands for configuring memory read/write packets. */
14029 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
14030 Set the maximum number of bytes per memory write packet (deprecated)."),
14032 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
14033 Show the maximum number of bytes per memory write packet (deprecated)."),
14035 add_cmd ("memory-write-packet-size", no_class
,
14036 set_memory_write_packet_size
, _("\
14037 Set the maximum number of bytes per memory-write packet.\n\
14038 Specify the number of bytes in a packet or 0 (zero) for the\n\
14039 default packet size. The actual limit is further reduced\n\
14040 dependent on the target. Specify ``fixed'' to disable the\n\
14041 further restriction and ``limit'' to enable that restriction."),
14042 &remote_set_cmdlist
);
14043 add_cmd ("memory-read-packet-size", no_class
,
14044 set_memory_read_packet_size
, _("\
14045 Set the maximum number of bytes per memory-read packet.\n\
14046 Specify the number of bytes in a packet or 0 (zero) for the\n\
14047 default packet size. The actual limit is further reduced\n\
14048 dependent on the target. Specify ``fixed'' to disable the\n\
14049 further restriction and ``limit'' to enable that restriction."),
14050 &remote_set_cmdlist
);
14051 add_cmd ("memory-write-packet-size", no_class
,
14052 show_memory_write_packet_size
,
14053 _("Show the maximum number of bytes per memory-write packet."),
14054 &remote_show_cmdlist
);
14055 add_cmd ("memory-read-packet-size", no_class
,
14056 show_memory_read_packet_size
,
14057 _("Show the maximum number of bytes per memory-read packet."),
14058 &remote_show_cmdlist
);
14060 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
14061 &remote_hw_watchpoint_limit
, _("\
14062 Set the maximum number of target hardware watchpoints."), _("\
14063 Show the maximum number of target hardware watchpoints."), _("\
14064 Specify a negative limit for unlimited."),
14065 NULL
, NULL
, /* FIXME: i18n: The maximum
14066 number of target hardware
14067 watchpoints is %s. */
14068 &remote_set_cmdlist
, &remote_show_cmdlist
);
14069 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
14070 &remote_hw_watchpoint_length_limit
, _("\
14071 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
14072 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
14073 Specify a negative limit for unlimited."),
14074 NULL
, NULL
, /* FIXME: i18n: The maximum
14075 length (in bytes) of a target
14076 hardware watchpoint is %s. */
14077 &remote_set_cmdlist
, &remote_show_cmdlist
);
14078 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
14079 &remote_hw_breakpoint_limit
, _("\
14080 Set the maximum number of target hardware breakpoints."), _("\
14081 Show the maximum number of target hardware breakpoints."), _("\
14082 Specify a negative limit for unlimited."),
14083 NULL
, NULL
, /* FIXME: i18n: The maximum
14084 number of target hardware
14085 breakpoints is %s. */
14086 &remote_set_cmdlist
, &remote_show_cmdlist
);
14088 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
14089 &remote_address_size
, _("\
14090 Set the maximum size of the address (in bits) in a memory packet."), _("\
14091 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
14093 NULL
, /* FIXME: i18n: */
14094 &setlist
, &showlist
);
14096 init_all_packet_configs ();
14098 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
14099 "X", "binary-download", 1);
14101 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
14102 "vCont", "verbose-resume", 0);
14104 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
14105 "QPassSignals", "pass-signals", 0);
14107 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
14108 "QCatchSyscalls", "catch-syscalls", 0);
14110 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
14111 "QProgramSignals", "program-signals", 0);
14113 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
14114 "qSymbol", "symbol-lookup", 0);
14116 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
14117 "P", "set-register", 1);
14119 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
14120 "p", "fetch-register", 1);
14122 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
14123 "Z0", "software-breakpoint", 0);
14125 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
14126 "Z1", "hardware-breakpoint", 0);
14128 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
14129 "Z2", "write-watchpoint", 0);
14131 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
14132 "Z3", "read-watchpoint", 0);
14134 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
14135 "Z4", "access-watchpoint", 0);
14137 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
14138 "qXfer:auxv:read", "read-aux-vector", 0);
14140 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
14141 "qXfer:exec-file:read", "pid-to-exec-file", 0);
14143 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
14144 "qXfer:features:read", "target-features", 0);
14146 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
14147 "qXfer:libraries:read", "library-info", 0);
14149 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
14150 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
14152 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
14153 "qXfer:memory-map:read", "memory-map", 0);
14155 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
14156 "qXfer:spu:read", "read-spu-object", 0);
14158 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
14159 "qXfer:spu:write", "write-spu-object", 0);
14161 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
14162 "qXfer:osdata:read", "osdata", 0);
14164 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
14165 "qXfer:threads:read", "threads", 0);
14167 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
14168 "qXfer:siginfo:read", "read-siginfo-object", 0);
14170 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
14171 "qXfer:siginfo:write", "write-siginfo-object", 0);
14173 add_packet_config_cmd
14174 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
14175 "qXfer:traceframe-info:read", "traceframe-info", 0);
14177 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
14178 "qXfer:uib:read", "unwind-info-block", 0);
14180 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
14181 "qGetTLSAddr", "get-thread-local-storage-address",
14184 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
14185 "qGetTIBAddr", "get-thread-information-block-address",
14188 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
14189 "bc", "reverse-continue", 0);
14191 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
14192 "bs", "reverse-step", 0);
14194 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
14195 "qSupported", "supported-packets", 0);
14197 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
14198 "qSearch:memory", "search-memory", 0);
14200 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
14201 "qTStatus", "trace-status", 0);
14203 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
14204 "vFile:setfs", "hostio-setfs", 0);
14206 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
14207 "vFile:open", "hostio-open", 0);
14209 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
14210 "vFile:pread", "hostio-pread", 0);
14212 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
14213 "vFile:pwrite", "hostio-pwrite", 0);
14215 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
14216 "vFile:close", "hostio-close", 0);
14218 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
14219 "vFile:unlink", "hostio-unlink", 0);
14221 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
14222 "vFile:readlink", "hostio-readlink", 0);
14224 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
14225 "vFile:fstat", "hostio-fstat", 0);
14227 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
14228 "vAttach", "attach", 0);
14230 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
14233 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
14234 "QStartNoAckMode", "noack", 0);
14236 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
14237 "vKill", "kill", 0);
14239 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
14240 "qAttached", "query-attached", 0);
14242 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
14243 "ConditionalTracepoints",
14244 "conditional-tracepoints", 0);
14246 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
14247 "ConditionalBreakpoints",
14248 "conditional-breakpoints", 0);
14250 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
14251 "BreakpointCommands",
14252 "breakpoint-commands", 0);
14254 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
14255 "FastTracepoints", "fast-tracepoints", 0);
14257 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
14258 "TracepointSource", "TracepointSource", 0);
14260 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
14261 "QAllow", "allow", 0);
14263 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
14264 "StaticTracepoints", "static-tracepoints", 0);
14266 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
14267 "InstallInTrace", "install-in-trace", 0);
14269 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
14270 "qXfer:statictrace:read", "read-sdata-object", 0);
14272 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
14273 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
14275 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
14276 "QDisableRandomization", "disable-randomization", 0);
14278 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
14279 "QAgent", "agent", 0);
14281 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
14282 "QTBuffer:size", "trace-buffer-size", 0);
14284 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
14285 "Qbtrace:off", "disable-btrace", 0);
14287 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
14288 "Qbtrace:bts", "enable-btrace-bts", 0);
14290 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
14291 "Qbtrace:pt", "enable-btrace-pt", 0);
14293 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
14294 "qXfer:btrace", "read-btrace", 0);
14296 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
14297 "qXfer:btrace-conf", "read-btrace-conf", 0);
14299 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
14300 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
14302 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
14303 "multiprocess-feature", "multiprocess-feature", 0);
14305 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
14306 "swbreak-feature", "swbreak-feature", 0);
14308 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
14309 "hwbreak-feature", "hwbreak-feature", 0);
14311 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
14312 "fork-event-feature", "fork-event-feature", 0);
14314 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
14315 "vfork-event-feature", "vfork-event-feature", 0);
14317 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
14318 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
14320 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
14321 "vContSupported", "verbose-resume-supported", 0);
14323 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
14324 "exec-event-feature", "exec-event-feature", 0);
14326 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
14327 "vCtrlC", "ctrl-c", 0);
14329 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
14330 "QThreadEvents", "thread-events", 0);
14332 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
14333 "N stop reply", "no-resumed-stop-reply", 0);
14335 /* Assert that we've registered "set remote foo-packet" commands
14336 for all packet configs. */
14340 for (i
= 0; i
< PACKET_MAX
; i
++)
14342 /* Ideally all configs would have a command associated. Some
14343 still don't though. */
14348 case PACKET_QNonStop
:
14349 case PACKET_EnableDisableTracepoints_feature
:
14350 case PACKET_tracenz_feature
:
14351 case PACKET_DisconnectedTracing_feature
:
14352 case PACKET_augmented_libraries_svr4_read_feature
:
14354 /* Additions to this list need to be well justified:
14355 pre-existing packets are OK; new packets are not. */
14363 /* This catches both forgetting to add a config command, and
14364 forgetting to remove a packet from the exception list. */
14365 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
14369 /* Keep the old ``set remote Z-packet ...'' working. Each individual
14370 Z sub-packet has its own set and show commands, but users may
14371 have sets to this variable in their .gdbinit files (or in their
14373 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
14374 &remote_Z_packet_detect
, _("\
14375 Set use of remote protocol `Z' packets"), _("\
14376 Show use of remote protocol `Z' packets "), _("\
14377 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
14379 set_remote_protocol_Z_packet_cmd
,
14380 show_remote_protocol_Z_packet_cmd
,
14381 /* FIXME: i18n: Use of remote protocol
14382 `Z' packets is %s. */
14383 &remote_set_cmdlist
, &remote_show_cmdlist
);
14385 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
14386 Manipulate files on the remote system\n\
14387 Transfer files to and from the remote target system."),
14388 &remote_cmdlist
, "remote ",
14389 0 /* allow-unknown */, &cmdlist
);
14391 add_cmd ("put", class_files
, remote_put_command
,
14392 _("Copy a local file to the remote system."),
14395 add_cmd ("get", class_files
, remote_get_command
,
14396 _("Copy a remote file to the local system."),
14399 add_cmd ("delete", class_files
, remote_delete_command
,
14400 _("Delete a remote file."),
14403 add_setshow_string_noescape_cmd ("exec-file", class_files
,
14404 &remote_exec_file_var
, _("\
14405 Set the remote pathname for \"run\""), _("\
14406 Show the remote pathname for \"run\""), NULL
,
14407 set_remote_exec_file
,
14408 show_remote_exec_file
,
14409 &remote_set_cmdlist
,
14410 &remote_show_cmdlist
);
14412 add_setshow_boolean_cmd ("range-stepping", class_run
,
14413 &use_range_stepping
, _("\
14414 Enable or disable range stepping."), _("\
14415 Show whether target-assisted range stepping is enabled."), _("\
14416 If on, and the target supports it, when stepping a source line, GDB\n\
14417 tells the target to step the corresponding range of addresses itself instead\n\
14418 of issuing multiple single-steps. This speeds up source level\n\
14419 stepping. If off, GDB always issues single-steps, even if range\n\
14420 stepping is supported by the target. The default is on."),
14421 set_range_stepping
,
14422 show_range_stepping
,
14426 /* Eventually initialize fileio. See fileio.c */
14427 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
14429 /* Take advantage of the fact that the TID field is not used, to tag
14430 special ptids with it set to != 0. */
14431 magic_null_ptid
= ptid_build (42000, -1, 1);
14432 not_sent_ptid
= ptid_build (42000, -2, 1);
14433 any_thread_ptid
= ptid_build (42000, 0, 1);
14435 target_buf_size
= 2048;
14436 target_buf
= (char *) xmalloc (target_buf_size
);