1 /* Remote target communications for serial-line targets in custom GDB protocol
3 Copyright (C) 1988-2016 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"
74 /* Temp hacks for tracepoint encoding migration. */
75 static char *target_buf
;
76 static long target_buf_size
;
78 /* Per-program-space data key. */
79 static const struct program_space_data
*remote_pspace_data
;
81 /* The variable registered as the control variable used by the
82 remote exec-file commands. While the remote exec-file setting is
83 per-program-space, the set/show machinery uses this as the
84 location of the remote exec-file value. */
85 static char *remote_exec_file_var
;
87 /* The size to align memory write packets, when practical. The protocol
88 does not guarantee any alignment, and gdb will generate short
89 writes and unaligned writes, but even as a best-effort attempt this
90 can improve bulk transfers. For instance, if a write is misaligned
91 relative to the target's data bus, the stub may need to make an extra
92 round trip fetching data from the target. This doesn't make a
93 huge difference, but it's easy to do, so we try to be helpful.
95 The alignment chosen is arbitrary; usually data bus width is
96 important here, not the possibly larger cache line size. */
97 enum { REMOTE_ALIGN_WRITES
= 16 };
99 /* Prototypes for local functions. */
100 static void async_cleanup_sigint_signal_handler (void *dummy
);
101 static int getpkt_sane (char **buf
, long *sizeof_buf
, int forever
);
102 static int getpkt_or_notif_sane (char **buf
, long *sizeof_buf
,
103 int forever
, int *is_notif
);
105 static void async_handle_remote_sigint (int);
106 static void async_handle_remote_sigint_twice (int);
108 static void remote_files_info (struct target_ops
*ignore
);
110 static void remote_prepare_to_store (struct target_ops
*self
,
111 struct regcache
*regcache
);
113 static void remote_open_1 (const char *, int, struct target_ops
*,
116 static void remote_close (struct target_ops
*self
);
120 static int remote_vkill (int pid
, struct remote_state
*rs
);
122 static void remote_kill_k (void);
124 static void remote_mourn (struct target_ops
*ops
);
126 static void extended_remote_restart (void);
128 static void remote_send (char **buf
, long *sizeof_buf_p
);
130 static int readchar (int timeout
);
132 static void remote_serial_write (const char *str
, int len
);
134 static void remote_kill (struct target_ops
*ops
);
136 static int remote_can_async_p (struct target_ops
*);
138 static int remote_is_async_p (struct target_ops
*);
140 static void remote_async (struct target_ops
*ops
, int enable
);
142 static void remote_thread_events (struct target_ops
*ops
, int enable
);
144 static void sync_remote_interrupt_twice (int signo
);
146 static void interrupt_query (void);
148 static void set_general_thread (struct ptid ptid
);
149 static void set_continue_thread (struct ptid ptid
);
151 static void get_offsets (void);
153 static void skip_frame (void);
155 static long read_frame (char **buf_p
, long *sizeof_buf
);
157 static int hexnumlen (ULONGEST num
);
159 static void init_remote_ops (void);
161 static void init_extended_remote_ops (void);
163 static void remote_stop (struct target_ops
*self
, ptid_t
);
165 static int stubhex (int ch
);
167 static int hexnumstr (char *, ULONGEST
);
169 static int hexnumnstr (char *, ULONGEST
, int);
171 static CORE_ADDR
remote_address_masked (CORE_ADDR
);
173 static void print_packet (const char *);
175 static void compare_sections_command (char *, int);
177 static void packet_command (char *, int);
179 static int stub_unpack_int (char *buff
, int fieldlength
);
181 static ptid_t
remote_current_thread (ptid_t oldptid
);
183 static int putpkt_binary (const char *buf
, int cnt
);
185 static void check_binary_download (CORE_ADDR addr
);
187 struct packet_config
;
189 static void show_packet_config_cmd (struct packet_config
*config
);
191 static void show_remote_protocol_packet_cmd (struct ui_file
*file
,
193 struct cmd_list_element
*c
,
196 static char *write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
);
197 static ptid_t
read_ptid (char *buf
, char **obuf
);
199 static void remote_set_permissions (struct target_ops
*self
);
201 static int remote_get_trace_status (struct target_ops
*self
,
202 struct trace_status
*ts
);
204 static int remote_upload_tracepoints (struct target_ops
*self
,
205 struct uploaded_tp
**utpp
);
207 static int remote_upload_trace_state_variables (struct target_ops
*self
,
208 struct uploaded_tsv
**utsvp
);
210 static void remote_query_supported (void);
212 static void remote_check_symbols (void);
214 void _initialize_remote (void);
217 static void stop_reply_xfree (struct stop_reply
*);
218 static void remote_parse_stop_reply (char *, struct stop_reply
*);
219 static void push_stop_reply (struct stop_reply
*);
220 static void discard_pending_stop_replies_in_queue (struct remote_state
*);
221 static int peek_stop_reply (ptid_t ptid
);
223 struct threads_listing_context
;
224 static void remove_new_fork_children (struct threads_listing_context
*);
226 static void remote_async_inferior_event_handler (gdb_client_data
);
228 static void remote_terminal_ours (struct target_ops
*self
);
230 static int remote_read_description_p (struct target_ops
*target
);
232 static void remote_console_output (char *msg
);
234 static int remote_supports_cond_breakpoints (struct target_ops
*self
);
236 static int remote_can_run_breakpoint_commands (struct target_ops
*self
);
238 static void remote_btrace_reset (void);
240 static int stop_reply_queue_length (void);
242 static void readahead_cache_invalidate (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 /* Data for the vFile:pread readahead cache. */
288 struct readahead_cache
290 /* The file descriptor for the file that is being cached. -1 if the
294 /* The offset into the file that the cache buffer corresponds
298 /* The buffer holding the cache contents. */
300 /* The buffer's size. We try to read as much as fits into a packet
304 /* Cache hit and miss counters. */
309 /* Description of the remote protocol state for the currently
310 connected target. This is per-target state, and independent of the
311 selected architecture. */
315 /* A buffer to use for incoming packets, and its current size. The
316 buffer is grown dynamically for larger incoming packets.
317 Outgoing packets may also be constructed in this buffer.
318 BUF_SIZE is always at least REMOTE_PACKET_SIZE;
319 REMOTE_PACKET_SIZE should be used to limit the length of outgoing
324 /* True if we're going through initial connection setup (finding out
325 about the remote side's threads, relocating symbols, etc.). */
328 /* If we negotiated packet size explicitly (and thus can bypass
329 heuristics for the largest packet size that will not overflow
330 a buffer in the stub), this will be set to that packet size.
331 Otherwise zero, meaning to use the guessed size. */
332 long explicit_packet_size
;
334 /* remote_wait is normally called when the target is running and
335 waits for a stop reply packet. But sometimes we need to call it
336 when the target is already stopped. We can send a "?" packet
337 and have remote_wait read the response. Or, if we already have
338 the response, we can stash it in BUF and tell remote_wait to
339 skip calling getpkt. This flag is set when BUF contains a
340 stop reply packet and the target is not waiting. */
341 int cached_wait_status
;
343 /* True, if in no ack mode. That is, neither GDB nor the stub will
344 expect acks from each other. The connection is assumed to be
348 /* True if we're connected in extended remote mode. */
351 /* True if we resumed the target and we're waiting for the target to
352 stop. In the mean time, we can't start another command/query.
353 The remote server wouldn't be ready to process it, so we'd
354 timeout waiting for a reply that would never come and eventually
355 we'd close the connection. This can happen in asynchronous mode
356 because we allow GDB commands while the target is running. */
357 int waiting_for_stop_reply
;
359 /* The status of the stub support for the various vCont actions. */
360 struct vCont_action_support supports_vCont
;
362 /* Nonzero if the user has pressed Ctrl-C, but the target hasn't
363 responded to that. */
366 /* Descriptor for I/O to remote machine. Initialize it to NULL so that
367 remote_open knows that we don't have a file open when the program
369 struct serial
*remote_desc
;
371 /* These are the threads which we last sent to the remote system. The
372 TID member will be -1 for all or -2 for not sent yet. */
373 ptid_t general_thread
;
374 ptid_t continue_thread
;
376 /* This is the traceframe which we last selected on the remote system.
377 It will be -1 if no traceframe is selected. */
378 int remote_traceframe_number
;
380 char *last_pass_packet
;
382 /* The last QProgramSignals packet sent to the target. We bypass
383 sending a new program signals list down to the target if the new
384 packet is exactly the same as the last we sent. IOW, we only let
385 the target know about program signals list changes. */
386 char *last_program_signals_packet
;
388 enum gdb_signal last_sent_signal
;
392 char *finished_object
;
393 char *finished_annex
;
394 ULONGEST finished_offset
;
396 /* Should we try the 'ThreadInfo' query packet?
398 This variable (NOT available to the user: auto-detect only!)
399 determines whether GDB will use the new, simpler "ThreadInfo"
400 query or the older, more complex syntax for thread queries.
401 This is an auto-detect variable (set to true at each connect,
402 and set to false when the target fails to recognize it). */
403 int use_threadinfo_query
;
404 int use_threadextra_query
;
406 threadref echo_nextthread
;
407 threadref nextthread
;
408 threadref resultthreadlist
[MAXTHREADLISTRESULTS
];
410 /* The state of remote notification. */
411 struct remote_notif_state
*notif_state
;
413 /* The branch trace configuration. */
414 struct btrace_config btrace_config
;
416 /* The argument to the last "vFile:setfs:" packet we sent, used
417 to avoid sending repeated unnecessary "vFile:setfs:" packets.
418 Initialized to -1 to indicate that no "vFile:setfs:" packet
419 has yet been sent. */
422 /* A readahead cache for vFile:pread. Often, reading a binary
423 involves a sequence of small reads. E.g., when parsing an ELF
424 file. A readahead cache helps mostly the case of remote
425 debugging on a connection with higher latency, due to the
426 request/reply nature of the RSP. We only cache data for a single
427 file descriptor at a time. */
428 struct readahead_cache readahead_cache
;
431 /* Private data that we'll store in (struct thread_info)->private. */
432 struct private_thread_info
438 /* Whether the target stopped for a breakpoint/watchpoint. */
439 enum target_stop_reason stop_reason
;
441 /* This is set to the data address of the access causing the target
442 to stop for a watchpoint. */
443 CORE_ADDR watch_data_address
;
447 free_private_thread_info (struct private_thread_info
*info
)
454 /* This data could be associated with a target, but we do not always
455 have access to the current target when we need it, so for now it is
456 static. This will be fine for as long as only one target is in use
458 static struct remote_state
*remote_state
;
460 static struct remote_state
*
461 get_remote_state_raw (void)
466 /* Allocate a new struct remote_state with xmalloc, initialize it, and
469 static struct remote_state
*
470 new_remote_state (void)
472 struct remote_state
*result
= XCNEW (struct remote_state
);
474 /* The default buffer size is unimportant; it will be expanded
475 whenever a larger buffer is needed. */
476 result
->buf_size
= 400;
477 result
->buf
= (char *) xmalloc (result
->buf_size
);
478 result
->remote_traceframe_number
= -1;
479 result
->last_sent_signal
= GDB_SIGNAL_0
;
485 /* Description of the remote protocol for a given architecture. */
489 long offset
; /* Offset into G packet. */
490 long regnum
; /* GDB's internal register number. */
491 LONGEST pnum
; /* Remote protocol register number. */
492 int in_g_packet
; /* Always part of G packet. */
493 /* long size in bytes; == register_size (target_gdbarch (), regnum);
495 /* char *name; == gdbarch_register_name (target_gdbarch (), regnum);
499 struct remote_arch_state
501 /* Description of the remote protocol registers. */
502 long sizeof_g_packet
;
504 /* Description of the remote protocol registers indexed by REGNUM
505 (making an array gdbarch_num_regs in size). */
506 struct packet_reg
*regs
;
508 /* This is the size (in chars) of the first response to the ``g''
509 packet. It is used as a heuristic when determining the maximum
510 size of memory-read and memory-write packets. A target will
511 typically only reserve a buffer large enough to hold the ``g''
512 packet. The size does not include packet overhead (headers and
514 long actual_register_packet_size
;
516 /* This is the maximum size (in chars) of a non read/write packet.
517 It is also used as a cap on the size of read/write packets. */
518 long remote_packet_size
;
521 /* Utility: generate error from an incoming stub packet. */
523 trace_error (char *buf
)
526 return; /* not an error msg */
529 case '1': /* malformed packet error */
530 if (*++buf
== '0') /* general case: */
531 error (_("remote.c: error in outgoing packet."));
533 error (_("remote.c: error in outgoing packet at field #%ld."),
534 strtol (buf
, NULL
, 16));
536 error (_("Target returns error code '%s'."), buf
);
540 /* Utility: wait for reply from stub, while accepting "O" packets. */
542 remote_get_noisy_reply (char **buf_p
,
545 do /* Loop on reply from remote stub. */
549 QUIT
; /* Allow user to bail out with ^C. */
550 getpkt (buf_p
, sizeof_buf
, 0);
554 else if (startswith (buf
, "qRelocInsn:"))
557 CORE_ADDR from
, to
, org_to
;
559 int adjusted_size
= 0;
562 p
= buf
+ strlen ("qRelocInsn:");
563 pp
= unpack_varlen_hex (p
, &ul
);
565 error (_("invalid qRelocInsn packet: %s"), buf
);
569 unpack_varlen_hex (p
, &ul
);
576 gdbarch_relocate_instruction (target_gdbarch (), &to
, from
);
579 CATCH (ex
, RETURN_MASK_ALL
)
581 if (ex
.error
== MEMORY_ERROR
)
583 /* Propagate memory errors silently back to the
584 target. The stub may have limited the range of
585 addresses we can write to, for example. */
589 /* Something unexpectedly bad happened. Be verbose
590 so we can tell what, and propagate the error back
591 to the stub, so it doesn't get stuck waiting for
593 exception_fprintf (gdb_stderr
, ex
,
594 _("warning: relocating instruction: "));
602 adjusted_size
= to
- org_to
;
604 xsnprintf (buf
, *sizeof_buf
, "qRelocInsn:%x", adjusted_size
);
608 else if (buf
[0] == 'O' && buf
[1] != 'K')
609 remote_console_output (buf
+ 1); /* 'O' message from stub */
611 return buf
; /* Here's the actual reply. */
616 /* Handle for retreving the remote protocol data from gdbarch. */
617 static struct gdbarch_data
*remote_gdbarch_data_handle
;
619 static struct remote_arch_state
*
620 get_remote_arch_state (void)
622 gdb_assert (target_gdbarch () != NULL
);
623 return ((struct remote_arch_state
*)
624 gdbarch_data (target_gdbarch (), remote_gdbarch_data_handle
));
627 /* Fetch the global remote target state. */
629 static struct remote_state
*
630 get_remote_state (void)
632 /* Make sure that the remote architecture state has been
633 initialized, because doing so might reallocate rs->buf. Any
634 function which calls getpkt also needs to be mindful of changes
635 to rs->buf, but this call limits the number of places which run
637 get_remote_arch_state ();
639 return get_remote_state_raw ();
642 /* Cleanup routine for the remote module's pspace data. */
645 remote_pspace_data_cleanup (struct program_space
*pspace
, void *arg
)
647 char *remote_exec_file
= (char *) arg
;
649 xfree (remote_exec_file
);
652 /* Fetch the remote exec-file from the current program space. */
655 get_remote_exec_file (void)
657 char *remote_exec_file
;
660 = (char *) program_space_data (current_program_space
,
662 if (remote_exec_file
== NULL
)
665 return remote_exec_file
;
668 /* Set the remote exec file for PSPACE. */
671 set_pspace_remote_exec_file (struct program_space
*pspace
,
672 char *remote_exec_file
)
674 char *old_file
= (char *) program_space_data (pspace
, remote_pspace_data
);
677 set_program_space_data (pspace
, remote_pspace_data
,
678 xstrdup (remote_exec_file
));
681 /* The "set/show remote exec-file" set command hook. */
684 set_remote_exec_file (char *ignored
, int from_tty
,
685 struct cmd_list_element
*c
)
687 gdb_assert (remote_exec_file_var
!= NULL
);
688 set_pspace_remote_exec_file (current_program_space
, remote_exec_file_var
);
691 /* The "set/show remote exec-file" show command hook. */
694 show_remote_exec_file (struct ui_file
*file
, int from_tty
,
695 struct cmd_list_element
*cmd
, const char *value
)
697 fprintf_filtered (file
, "%s\n", remote_exec_file_var
);
701 compare_pnums (const void *lhs_
, const void *rhs_
)
703 const struct packet_reg
* const *lhs
704 = (const struct packet_reg
* const *) lhs_
;
705 const struct packet_reg
* const *rhs
706 = (const struct packet_reg
* const *) rhs_
;
708 if ((*lhs
)->pnum
< (*rhs
)->pnum
)
710 else if ((*lhs
)->pnum
== (*rhs
)->pnum
)
717 map_regcache_remote_table (struct gdbarch
*gdbarch
, struct packet_reg
*regs
)
719 int regnum
, num_remote_regs
, offset
;
720 struct packet_reg
**remote_regs
;
722 for (regnum
= 0; regnum
< gdbarch_num_regs (gdbarch
); regnum
++)
724 struct packet_reg
*r
= ®s
[regnum
];
726 if (register_size (gdbarch
, regnum
) == 0)
727 /* Do not try to fetch zero-sized (placeholder) registers. */
730 r
->pnum
= gdbarch_remote_register_number (gdbarch
, regnum
);
735 /* Define the g/G packet format as the contents of each register
736 with a remote protocol number, in order of ascending protocol
739 remote_regs
= XALLOCAVEC (struct packet_reg
*, gdbarch_num_regs (gdbarch
));
740 for (num_remote_regs
= 0, regnum
= 0;
741 regnum
< gdbarch_num_regs (gdbarch
);
743 if (regs
[regnum
].pnum
!= -1)
744 remote_regs
[num_remote_regs
++] = ®s
[regnum
];
746 qsort (remote_regs
, num_remote_regs
, sizeof (struct packet_reg
*),
749 for (regnum
= 0, offset
= 0; regnum
< num_remote_regs
; regnum
++)
751 remote_regs
[regnum
]->in_g_packet
= 1;
752 remote_regs
[regnum
]->offset
= offset
;
753 offset
+= register_size (gdbarch
, remote_regs
[regnum
]->regnum
);
759 /* Given the architecture described by GDBARCH, return the remote
760 protocol register's number and the register's offset in the g/G
761 packets of GDB register REGNUM, in PNUM and POFFSET respectively.
762 If the target does not have a mapping for REGNUM, return false,
763 otherwise, return true. */
766 remote_register_number_and_offset (struct gdbarch
*gdbarch
, int regnum
,
767 int *pnum
, int *poffset
)
769 struct packet_reg
*regs
;
770 struct cleanup
*old_chain
;
772 gdb_assert (regnum
< gdbarch_num_regs (gdbarch
));
774 regs
= XCNEWVEC (struct packet_reg
, gdbarch_num_regs (gdbarch
));
775 old_chain
= make_cleanup (xfree
, regs
);
777 map_regcache_remote_table (gdbarch
, regs
);
779 *pnum
= regs
[regnum
].pnum
;
780 *poffset
= regs
[regnum
].offset
;
782 do_cleanups (old_chain
);
788 init_remote_state (struct gdbarch
*gdbarch
)
790 struct remote_state
*rs
= get_remote_state_raw ();
791 struct remote_arch_state
*rsa
;
793 rsa
= GDBARCH_OBSTACK_ZALLOC (gdbarch
, struct remote_arch_state
);
795 /* Use the architecture to build a regnum<->pnum table, which will be
796 1:1 unless a feature set specifies otherwise. */
797 rsa
->regs
= GDBARCH_OBSTACK_CALLOC (gdbarch
,
798 gdbarch_num_regs (gdbarch
),
801 /* Record the maximum possible size of the g packet - it may turn out
803 rsa
->sizeof_g_packet
= map_regcache_remote_table (gdbarch
, rsa
->regs
);
805 /* Default maximum number of characters in a packet body. Many
806 remote stubs have a hardwired buffer size of 400 bytes
807 (c.f. BUFMAX in m68k-stub.c and i386-stub.c). BUFMAX-1 is used
808 as the maximum packet-size to ensure that the packet and an extra
809 NUL character can always fit in the buffer. This stops GDB
810 trashing stubs that try to squeeze an extra NUL into what is
811 already a full buffer (As of 1999-12-04 that was most stubs). */
812 rsa
->remote_packet_size
= 400 - 1;
814 /* This one is filled in when a ``g'' packet is received. */
815 rsa
->actual_register_packet_size
= 0;
817 /* Should rsa->sizeof_g_packet needs more space than the
818 default, adjust the size accordingly. Remember that each byte is
819 encoded as two characters. 32 is the overhead for the packet
820 header / footer. NOTE: cagney/1999-10-26: I suspect that 8
821 (``$NN:G...#NN'') is a better guess, the below has been padded a
823 if (rsa
->sizeof_g_packet
> ((rsa
->remote_packet_size
- 32) / 2))
824 rsa
->remote_packet_size
= (rsa
->sizeof_g_packet
* 2 + 32);
826 /* Make sure that the packet buffer is plenty big enough for
827 this architecture. */
828 if (rs
->buf_size
< rsa
->remote_packet_size
)
830 rs
->buf_size
= 2 * rsa
->remote_packet_size
;
831 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
837 /* Return the current allowed size of a remote packet. This is
838 inferred from the current architecture, and should be used to
839 limit the length of outgoing packets. */
841 get_remote_packet_size (void)
843 struct remote_state
*rs
= get_remote_state ();
844 struct remote_arch_state
*rsa
= get_remote_arch_state ();
846 if (rs
->explicit_packet_size
)
847 return rs
->explicit_packet_size
;
849 return rsa
->remote_packet_size
;
852 static struct packet_reg
*
853 packet_reg_from_regnum (struct remote_arch_state
*rsa
, long regnum
)
855 if (regnum
< 0 && regnum
>= gdbarch_num_regs (target_gdbarch ()))
859 struct packet_reg
*r
= &rsa
->regs
[regnum
];
861 gdb_assert (r
->regnum
== regnum
);
866 static struct packet_reg
*
867 packet_reg_from_pnum (struct remote_arch_state
*rsa
, LONGEST pnum
)
871 for (i
= 0; i
< gdbarch_num_regs (target_gdbarch ()); i
++)
873 struct packet_reg
*r
= &rsa
->regs
[i
];
881 static struct target_ops remote_ops
;
883 static struct target_ops extended_remote_ops
;
885 /* FIXME: cagney/1999-09-23: Even though getpkt was called with
886 ``forever'' still use the normal timeout mechanism. This is
887 currently used by the ASYNC code to guarentee that target reads
888 during the initial connect always time-out. Once getpkt has been
889 modified to return a timeout indication and, in turn
890 remote_wait()/wait_for_inferior() have gained a timeout parameter
892 static int wait_forever_enabled_p
= 1;
894 /* Allow the user to specify what sequence to send to the remote
895 when he requests a program interruption: Although ^C is usually
896 what remote systems expect (this is the default, here), it is
897 sometimes preferable to send a break. On other systems such
898 as the Linux kernel, a break followed by g, which is Magic SysRq g
899 is required in order to interrupt the execution. */
900 const char interrupt_sequence_control_c
[] = "Ctrl-C";
901 const char interrupt_sequence_break
[] = "BREAK";
902 const char interrupt_sequence_break_g
[] = "BREAK-g";
903 static const char *const interrupt_sequence_modes
[] =
905 interrupt_sequence_control_c
,
906 interrupt_sequence_break
,
907 interrupt_sequence_break_g
,
910 static const char *interrupt_sequence_mode
= interrupt_sequence_control_c
;
913 show_interrupt_sequence (struct ui_file
*file
, int from_tty
,
914 struct cmd_list_element
*c
,
917 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
918 fprintf_filtered (file
,
919 _("Send the ASCII ETX character (Ctrl-c) "
920 "to the remote target to interrupt the "
921 "execution of the program.\n"));
922 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
923 fprintf_filtered (file
,
924 _("send a break signal to the remote target "
925 "to interrupt the execution of the program.\n"));
926 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
927 fprintf_filtered (file
,
928 _("Send a break signal and 'g' a.k.a. Magic SysRq g to "
929 "the remote target to interrupt the execution "
930 "of Linux kernel.\n"));
932 internal_error (__FILE__
, __LINE__
,
933 _("Invalid value for interrupt_sequence_mode: %s."),
934 interrupt_sequence_mode
);
937 /* This boolean variable specifies whether interrupt_sequence is sent
938 to the remote target when gdb connects to it.
939 This is mostly needed when you debug the Linux kernel: The Linux kernel
940 expects BREAK g which is Magic SysRq g for connecting gdb. */
941 static int interrupt_on_connect
= 0;
943 /* This variable is used to implement the "set/show remotebreak" commands.
944 Since these commands are now deprecated in favor of "set/show remote
945 interrupt-sequence", it no longer has any effect on the code. */
946 static int remote_break
;
949 set_remotebreak (char *args
, int from_tty
, struct cmd_list_element
*c
)
952 interrupt_sequence_mode
= interrupt_sequence_break
;
954 interrupt_sequence_mode
= interrupt_sequence_control_c
;
958 show_remotebreak (struct ui_file
*file
, int from_tty
,
959 struct cmd_list_element
*c
,
964 /* This variable sets the number of bits in an address that are to be
965 sent in a memory ("M" or "m") packet. Normally, after stripping
966 leading zeros, the entire address would be sent. This variable
967 restricts the address to REMOTE_ADDRESS_SIZE bits. HISTORY: The
968 initial implementation of remote.c restricted the address sent in
969 memory packets to ``host::sizeof long'' bytes - (typically 32
970 bits). Consequently, for 64 bit targets, the upper 32 bits of an
971 address was never sent. Since fixing this bug may cause a break in
972 some remote targets this variable is principly provided to
973 facilitate backward compatibility. */
975 static unsigned int remote_address_size
;
977 /* Temporary to track who currently owns the terminal. See
978 remote_terminal_* for more details. */
980 static int remote_async_terminal_ours_p
;
983 /* User configurable variables for the number of characters in a
984 memory read/write packet. MIN (rsa->remote_packet_size,
985 rsa->sizeof_g_packet) is the default. Some targets need smaller
986 values (fifo overruns, et.al.) and some users need larger values
987 (speed up transfers). The variables ``preferred_*'' (the user
988 request), ``current_*'' (what was actually set) and ``forced_*''
989 (Positive - a soft limit, negative - a hard limit). */
991 struct memory_packet_config
998 /* The default max memory-write-packet-size. The 16k is historical.
999 (It came from older GDB's using alloca for buffers and the
1000 knowledge (folklore?) that some hosts don't cope very well with
1001 large alloca calls.) */
1002 #define DEFAULT_MAX_MEMORY_PACKET_SIZE 16384
1004 /* The minimum remote packet size for memory transfers. Ensures we
1005 can write at least one byte. */
1006 #define MIN_MEMORY_PACKET_SIZE 20
1008 /* Compute the current size of a read/write packet. Since this makes
1009 use of ``actual_register_packet_size'' the computation is dynamic. */
1012 get_memory_packet_size (struct memory_packet_config
*config
)
1014 struct remote_state
*rs
= get_remote_state ();
1015 struct remote_arch_state
*rsa
= get_remote_arch_state ();
1018 if (config
->fixed_p
)
1020 if (config
->size
<= 0)
1021 what_they_get
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1023 what_they_get
= config
->size
;
1027 what_they_get
= get_remote_packet_size ();
1028 /* Limit the packet to the size specified by the user. */
1029 if (config
->size
> 0
1030 && what_they_get
> config
->size
)
1031 what_they_get
= config
->size
;
1033 /* Limit it to the size of the targets ``g'' response unless we have
1034 permission from the stub to use a larger packet size. */
1035 if (rs
->explicit_packet_size
== 0
1036 && rsa
->actual_register_packet_size
> 0
1037 && what_they_get
> rsa
->actual_register_packet_size
)
1038 what_they_get
= rsa
->actual_register_packet_size
;
1040 if (what_they_get
< MIN_MEMORY_PACKET_SIZE
)
1041 what_they_get
= MIN_MEMORY_PACKET_SIZE
;
1043 /* Make sure there is room in the global buffer for this packet
1044 (including its trailing NUL byte). */
1045 if (rs
->buf_size
< what_they_get
+ 1)
1047 rs
->buf_size
= 2 * what_they_get
;
1048 rs
->buf
= (char *) xrealloc (rs
->buf
, 2 * what_they_get
);
1051 return what_they_get
;
1054 /* Update the size of a read/write packet. If they user wants
1055 something really big then do a sanity check. */
1058 set_memory_packet_size (char *args
, struct memory_packet_config
*config
)
1060 int fixed_p
= config
->fixed_p
;
1061 long size
= config
->size
;
1064 error (_("Argument required (integer, `fixed' or `limited')."));
1065 else if (strcmp (args
, "hard") == 0
1066 || strcmp (args
, "fixed") == 0)
1068 else if (strcmp (args
, "soft") == 0
1069 || strcmp (args
, "limit") == 0)
1075 size
= strtoul (args
, &end
, 0);
1077 error (_("Invalid %s (bad syntax)."), config
->name
);
1079 /* Instead of explicitly capping the size of a packet to or
1080 disallowing it, the user is allowed to set the size to
1081 something arbitrarily large. */
1084 /* So that the query shows the correct value. */
1086 size
= DEFAULT_MAX_MEMORY_PACKET_SIZE
;
1089 if (fixed_p
&& !config
->fixed_p
)
1091 if (! query (_("The target may not be able to correctly handle a %s\n"
1092 "of %ld bytes. Change the packet size? "),
1093 config
->name
, size
))
1094 error (_("Packet size not changed."));
1096 /* Update the config. */
1097 config
->fixed_p
= fixed_p
;
1098 config
->size
= size
;
1102 show_memory_packet_size (struct memory_packet_config
*config
)
1104 printf_filtered (_("The %s is %ld. "), config
->name
, config
->size
);
1105 if (config
->fixed_p
)
1106 printf_filtered (_("Packets are fixed at %ld bytes.\n"),
1107 get_memory_packet_size (config
));
1109 printf_filtered (_("Packets are limited to %ld bytes.\n"),
1110 get_memory_packet_size (config
));
1113 static struct memory_packet_config memory_write_packet_config
=
1115 "memory-write-packet-size",
1119 set_memory_write_packet_size (char *args
, int from_tty
)
1121 set_memory_packet_size (args
, &memory_write_packet_config
);
1125 show_memory_write_packet_size (char *args
, int from_tty
)
1127 show_memory_packet_size (&memory_write_packet_config
);
1131 get_memory_write_packet_size (void)
1133 return get_memory_packet_size (&memory_write_packet_config
);
1136 static struct memory_packet_config memory_read_packet_config
=
1138 "memory-read-packet-size",
1142 set_memory_read_packet_size (char *args
, int from_tty
)
1144 set_memory_packet_size (args
, &memory_read_packet_config
);
1148 show_memory_read_packet_size (char *args
, int from_tty
)
1150 show_memory_packet_size (&memory_read_packet_config
);
1154 get_memory_read_packet_size (void)
1156 long size
= get_memory_packet_size (&memory_read_packet_config
);
1158 /* FIXME: cagney/1999-11-07: Functions like getpkt() need to get an
1159 extra buffer size argument before the memory read size can be
1160 increased beyond this. */
1161 if (size
> get_remote_packet_size ())
1162 size
= get_remote_packet_size ();
1167 /* Generic configuration support for packets the stub optionally
1168 supports. Allows the user to specify the use of the packet as well
1169 as allowing GDB to auto-detect support in the remote stub. */
1173 PACKET_SUPPORT_UNKNOWN
= 0,
1178 struct packet_config
1183 /* If auto, GDB auto-detects support for this packet or feature,
1184 either through qSupported, or by trying the packet and looking
1185 at the response. If true, GDB assumes the target supports this
1186 packet. If false, the packet is disabled. Configs that don't
1187 have an associated command always have this set to auto. */
1188 enum auto_boolean detect
;
1190 /* Does the target support this packet? */
1191 enum packet_support support
;
1194 /* Analyze a packet's return value and update the packet config
1204 static enum packet_support
packet_config_support (struct packet_config
*config
);
1205 static enum packet_support
packet_support (int packet
);
1208 show_packet_config_cmd (struct packet_config
*config
)
1210 char *support
= "internal-error";
1212 switch (packet_config_support (config
))
1215 support
= "enabled";
1217 case PACKET_DISABLE
:
1218 support
= "disabled";
1220 case PACKET_SUPPORT_UNKNOWN
:
1221 support
= "unknown";
1224 switch (config
->detect
)
1226 case AUTO_BOOLEAN_AUTO
:
1227 printf_filtered (_("Support for the `%s' packet "
1228 "is auto-detected, currently %s.\n"),
1229 config
->name
, support
);
1231 case AUTO_BOOLEAN_TRUE
:
1232 case AUTO_BOOLEAN_FALSE
:
1233 printf_filtered (_("Support for the `%s' packet is currently %s.\n"),
1234 config
->name
, support
);
1240 add_packet_config_cmd (struct packet_config
*config
, const char *name
,
1241 const char *title
, int legacy
)
1247 config
->name
= name
;
1248 config
->title
= title
;
1249 set_doc
= xstrprintf ("Set use of remote protocol `%s' (%s) packet",
1251 show_doc
= xstrprintf ("Show current use of remote "
1252 "protocol `%s' (%s) packet",
1254 /* set/show TITLE-packet {auto,on,off} */
1255 cmd_name
= xstrprintf ("%s-packet", title
);
1256 add_setshow_auto_boolean_cmd (cmd_name
, class_obscure
,
1257 &config
->detect
, set_doc
,
1258 show_doc
, NULL
, /* help_doc */
1260 show_remote_protocol_packet_cmd
,
1261 &remote_set_cmdlist
, &remote_show_cmdlist
);
1262 /* The command code copies the documentation strings. */
1265 /* set/show remote NAME-packet {auto,on,off} -- legacy. */
1270 legacy_name
= xstrprintf ("%s-packet", name
);
1271 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1272 &remote_set_cmdlist
);
1273 add_alias_cmd (legacy_name
, cmd_name
, class_obscure
, 0,
1274 &remote_show_cmdlist
);
1278 static enum packet_result
1279 packet_check_result (const char *buf
)
1283 /* The stub recognized the packet request. Check that the
1284 operation succeeded. */
1286 && isxdigit (buf
[1]) && isxdigit (buf
[2])
1288 /* "Enn" - definitly an error. */
1289 return PACKET_ERROR
;
1291 /* Always treat "E." as an error. This will be used for
1292 more verbose error messages, such as E.memtypes. */
1293 if (buf
[0] == 'E' && buf
[1] == '.')
1294 return PACKET_ERROR
;
1296 /* The packet may or may not be OK. Just assume it is. */
1300 /* The stub does not support the packet. */
1301 return PACKET_UNKNOWN
;
1304 static enum packet_result
1305 packet_ok (const char *buf
, struct packet_config
*config
)
1307 enum packet_result result
;
1309 if (config
->detect
!= AUTO_BOOLEAN_TRUE
1310 && config
->support
== PACKET_DISABLE
)
1311 internal_error (__FILE__
, __LINE__
,
1312 _("packet_ok: attempt to use a disabled packet"));
1314 result
= packet_check_result (buf
);
1319 /* The stub recognized the packet request. */
1320 if (config
->support
== PACKET_SUPPORT_UNKNOWN
)
1323 fprintf_unfiltered (gdb_stdlog
,
1324 "Packet %s (%s) is supported\n",
1325 config
->name
, config
->title
);
1326 config
->support
= PACKET_ENABLE
;
1329 case PACKET_UNKNOWN
:
1330 /* The stub does not support the packet. */
1331 if (config
->detect
== AUTO_BOOLEAN_AUTO
1332 && config
->support
== PACKET_ENABLE
)
1334 /* If the stub previously indicated that the packet was
1335 supported then there is a protocol error. */
1336 error (_("Protocol error: %s (%s) conflicting enabled responses."),
1337 config
->name
, config
->title
);
1339 else if (config
->detect
== AUTO_BOOLEAN_TRUE
)
1341 /* The user set it wrong. */
1342 error (_("Enabled packet %s (%s) not recognized by stub"),
1343 config
->name
, config
->title
);
1347 fprintf_unfiltered (gdb_stdlog
,
1348 "Packet %s (%s) is NOT supported\n",
1349 config
->name
, config
->title
);
1350 config
->support
= PACKET_DISABLE
;
1371 PACKET_vFile_pwrite
,
1373 PACKET_vFile_unlink
,
1374 PACKET_vFile_readlink
,
1377 PACKET_qXfer_features
,
1378 PACKET_qXfer_exec_file
,
1379 PACKET_qXfer_libraries
,
1380 PACKET_qXfer_libraries_svr4
,
1381 PACKET_qXfer_memory_map
,
1382 PACKET_qXfer_spu_read
,
1383 PACKET_qXfer_spu_write
,
1384 PACKET_qXfer_osdata
,
1385 PACKET_qXfer_threads
,
1386 PACKET_qXfer_statictrace_read
,
1387 PACKET_qXfer_traceframe_info
,
1393 PACKET_QPassSignals
,
1394 PACKET_QCatchSyscalls
,
1395 PACKET_QProgramSignals
,
1397 PACKET_qSearch_memory
,
1400 PACKET_QStartNoAckMode
,
1402 PACKET_qXfer_siginfo_read
,
1403 PACKET_qXfer_siginfo_write
,
1406 /* Support for conditional tracepoints. */
1407 PACKET_ConditionalTracepoints
,
1409 /* Support for target-side breakpoint conditions. */
1410 PACKET_ConditionalBreakpoints
,
1412 /* Support for target-side breakpoint commands. */
1413 PACKET_BreakpointCommands
,
1415 /* Support for fast tracepoints. */
1416 PACKET_FastTracepoints
,
1418 /* Support for static tracepoints. */
1419 PACKET_StaticTracepoints
,
1421 /* Support for installing tracepoints while a trace experiment is
1423 PACKET_InstallInTrace
,
1427 PACKET_TracepointSource
,
1430 PACKET_QDisableRandomization
,
1432 PACKET_QTBuffer_size
,
1436 PACKET_qXfer_btrace
,
1438 /* Support for the QNonStop packet. */
1441 /* Support for the QThreadEvents packet. */
1442 PACKET_QThreadEvents
,
1444 /* Support for multi-process extensions. */
1445 PACKET_multiprocess_feature
,
1447 /* Support for enabling and disabling tracepoints while a trace
1448 experiment is running. */
1449 PACKET_EnableDisableTracepoints_feature
,
1451 /* Support for collecting strings using the tracenz bytecode. */
1452 PACKET_tracenz_feature
,
1454 /* Support for continuing to run a trace experiment while GDB is
1456 PACKET_DisconnectedTracing_feature
,
1458 /* Support for qXfer:libraries-svr4:read with a non-empty annex. */
1459 PACKET_augmented_libraries_svr4_read_feature
,
1461 /* Support for the qXfer:btrace-conf:read packet. */
1462 PACKET_qXfer_btrace_conf
,
1464 /* Support for the Qbtrace-conf:bts:size packet. */
1465 PACKET_Qbtrace_conf_bts_size
,
1467 /* Support for swbreak+ feature. */
1468 PACKET_swbreak_feature
,
1470 /* Support for hwbreak+ feature. */
1471 PACKET_hwbreak_feature
,
1473 /* Support for fork events. */
1474 PACKET_fork_event_feature
,
1476 /* Support for vfork events. */
1477 PACKET_vfork_event_feature
,
1479 /* Support for the Qbtrace-conf:pt:size packet. */
1480 PACKET_Qbtrace_conf_pt_size
,
1482 /* Support for exec events. */
1483 PACKET_exec_event_feature
,
1485 /* Support for query supported vCont actions. */
1486 PACKET_vContSupported
,
1488 /* Support remote CTRL-C. */
1491 /* Support TARGET_WAITKIND_NO_RESUMED. */
1497 static struct packet_config remote_protocol_packets
[PACKET_MAX
];
1499 /* gdbserver < 7.7 (before its fix from 2013-12-11) did reply to any
1500 unknown 'v' packet with string "OK". "OK" gets interpreted by GDB
1501 as a reply to known packet. For packet "vFile:setfs:" it is an
1502 invalid reply and GDB would return error in
1503 remote_hostio_set_filesystem, making remote files access impossible.
1504 If this variable is non-zero it means the remote gdbserver is buggy
1505 and any not yet detected packets are assumed as unsupported. */
1506 static int unknown_v_replies_ok
;
1508 /* Returns the packet's corresponding "set remote foo-packet" command
1509 state. See struct packet_config for more details. */
1511 static enum auto_boolean
1512 packet_set_cmd_state (int packet
)
1514 return remote_protocol_packets
[packet
].detect
;
1517 /* Returns whether a given packet or feature is supported. This takes
1518 into account the state of the corresponding "set remote foo-packet"
1519 command, which may be used to bypass auto-detection. */
1521 static enum packet_support
1522 packet_config_support (struct packet_config
*config
)
1524 switch (config
->detect
)
1526 case AUTO_BOOLEAN_TRUE
:
1527 return PACKET_ENABLE
;
1528 case AUTO_BOOLEAN_FALSE
:
1529 return PACKET_DISABLE
;
1530 case AUTO_BOOLEAN_AUTO
:
1531 if (unknown_v_replies_ok
&& config
->name
!= NULL
1532 && config
->name
[0] == 'v')
1533 return PACKET_DISABLE
;
1534 return config
->support
;
1536 gdb_assert_not_reached (_("bad switch"));
1540 /* Same as packet_config_support, but takes the packet's enum value as
1543 static enum packet_support
1544 packet_support (int packet
)
1546 struct packet_config
*config
= &remote_protocol_packets
[packet
];
1548 return packet_config_support (config
);
1552 show_remote_protocol_packet_cmd (struct ui_file
*file
, int from_tty
,
1553 struct cmd_list_element
*c
,
1556 struct packet_config
*packet
;
1558 for (packet
= remote_protocol_packets
;
1559 packet
< &remote_protocol_packets
[PACKET_MAX
];
1562 if (&packet
->detect
== c
->var
)
1564 show_packet_config_cmd (packet
);
1568 internal_error (__FILE__
, __LINE__
, _("Could not find config for %s"),
1572 /* Should we try one of the 'Z' requests? */
1576 Z_PACKET_SOFTWARE_BP
,
1577 Z_PACKET_HARDWARE_BP
,
1584 /* For compatibility with older distributions. Provide a ``set remote
1585 Z-packet ...'' command that updates all the Z packet types. */
1587 static enum auto_boolean remote_Z_packet_detect
;
1590 set_remote_protocol_Z_packet_cmd (char *args
, int from_tty
,
1591 struct cmd_list_element
*c
)
1595 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1596 remote_protocol_packets
[PACKET_Z0
+ i
].detect
= remote_Z_packet_detect
;
1600 show_remote_protocol_Z_packet_cmd (struct ui_file
*file
, int from_tty
,
1601 struct cmd_list_element
*c
,
1606 for (i
= 0; i
< NR_Z_PACKET_TYPES
; i
++)
1608 show_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
+ i
]);
1612 /* Returns true if the multi-process extensions are in effect. */
1615 remote_multi_process_p (struct remote_state
*rs
)
1617 return packet_support (PACKET_multiprocess_feature
) == PACKET_ENABLE
;
1620 /* Returns true if fork events are supported. */
1623 remote_fork_event_p (struct remote_state
*rs
)
1625 return packet_support (PACKET_fork_event_feature
) == PACKET_ENABLE
;
1628 /* Returns true if vfork events are supported. */
1631 remote_vfork_event_p (struct remote_state
*rs
)
1633 return packet_support (PACKET_vfork_event_feature
) == PACKET_ENABLE
;
1636 /* Returns true if exec events are supported. */
1639 remote_exec_event_p (struct remote_state
*rs
)
1641 return packet_support (PACKET_exec_event_feature
) == PACKET_ENABLE
;
1644 /* Insert fork catchpoint target routine. If fork events are enabled
1645 then return success, nothing more to do. */
1648 remote_insert_fork_catchpoint (struct target_ops
*ops
, int pid
)
1650 struct remote_state
*rs
= get_remote_state ();
1652 return !remote_fork_event_p (rs
);
1655 /* Remove fork catchpoint target routine. Nothing to do, just
1659 remote_remove_fork_catchpoint (struct target_ops
*ops
, int pid
)
1664 /* Insert vfork catchpoint target routine. If vfork events are enabled
1665 then return success, nothing more to do. */
1668 remote_insert_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1670 struct remote_state
*rs
= get_remote_state ();
1672 return !remote_vfork_event_p (rs
);
1675 /* Remove vfork catchpoint target routine. Nothing to do, just
1679 remote_remove_vfork_catchpoint (struct target_ops
*ops
, int pid
)
1684 /* Insert exec catchpoint target routine. If exec events are
1685 enabled, just return success. */
1688 remote_insert_exec_catchpoint (struct target_ops
*ops
, int pid
)
1690 struct remote_state
*rs
= get_remote_state ();
1692 return !remote_exec_event_p (rs
);
1695 /* Remove exec catchpoint target routine. Nothing to do, just
1699 remote_remove_exec_catchpoint (struct target_ops
*ops
, int pid
)
1704 /* Tokens for use by the asynchronous signal handlers for SIGINT. */
1705 static struct async_signal_handler
*async_sigint_remote_twice_token
;
1706 static struct async_signal_handler
*async_sigint_remote_token
;
1709 /* Asynchronous signal handle registered as event loop source for
1710 when we have pending events ready to be passed to the core. */
1712 static struct async_event_handler
*remote_async_inferior_event_token
;
1716 static ptid_t magic_null_ptid
;
1717 static ptid_t not_sent_ptid
;
1718 static ptid_t any_thread_ptid
;
1720 /* Find out if the stub attached to PID (and hence GDB should offer to
1721 detach instead of killing it when bailing out). */
1724 remote_query_attached (int pid
)
1726 struct remote_state
*rs
= get_remote_state ();
1727 size_t size
= get_remote_packet_size ();
1729 if (packet_support (PACKET_qAttached
) == PACKET_DISABLE
)
1732 if (remote_multi_process_p (rs
))
1733 xsnprintf (rs
->buf
, size
, "qAttached:%x", pid
);
1735 xsnprintf (rs
->buf
, size
, "qAttached");
1738 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1740 switch (packet_ok (rs
->buf
,
1741 &remote_protocol_packets
[PACKET_qAttached
]))
1744 if (strcmp (rs
->buf
, "1") == 0)
1748 warning (_("Remote failure reply: %s"), rs
->buf
);
1750 case PACKET_UNKNOWN
:
1757 /* Add PID to GDB's inferior table. If FAKE_PID_P is true, then PID
1758 has been invented by GDB, instead of reported by the target. Since
1759 we can be connected to a remote system before before knowing about
1760 any inferior, mark the target with execution when we find the first
1761 inferior. If ATTACHED is 1, then we had just attached to this
1762 inferior. If it is 0, then we just created this inferior. If it
1763 is -1, then try querying the remote stub to find out if it had
1764 attached to the inferior or not. If TRY_OPEN_EXEC is true then
1765 attempt to open this inferior's executable as the main executable
1766 if no main executable is open already. */
1768 static struct inferior
*
1769 remote_add_inferior (int fake_pid_p
, int pid
, int attached
,
1772 struct inferior
*inf
;
1774 /* Check whether this process we're learning about is to be
1775 considered attached, or if is to be considered to have been
1776 spawned by the stub. */
1778 attached
= remote_query_attached (pid
);
1780 if (gdbarch_has_global_solist (target_gdbarch ()))
1782 /* If the target shares code across all inferiors, then every
1783 attach adds a new inferior. */
1784 inf
= add_inferior (pid
);
1786 /* ... and every inferior is bound to the same program space.
1787 However, each inferior may still have its own address
1789 inf
->aspace
= maybe_new_address_space ();
1790 inf
->pspace
= current_program_space
;
1794 /* In the traditional debugging scenario, there's a 1-1 match
1795 between program/address spaces. We simply bind the inferior
1796 to the program space's address space. */
1797 inf
= current_inferior ();
1798 inferior_appeared (inf
, pid
);
1801 inf
->attach_flag
= attached
;
1802 inf
->fake_pid_p
= fake_pid_p
;
1804 /* If no main executable is currently open then attempt to
1805 open the file that was executed to create this inferior. */
1806 if (try_open_exec
&& get_exec_file (0) == NULL
)
1807 exec_file_locate_attach (pid
, 1);
1812 /* Add thread PTID to GDB's thread list. Tag it as executing/running
1813 according to RUNNING. */
1816 remote_add_thread (ptid_t ptid
, int running
, int executing
)
1818 struct remote_state
*rs
= get_remote_state ();
1820 /* GDB historically didn't pull threads in the initial connection
1821 setup. If the remote target doesn't even have a concept of
1822 threads (e.g., a bare-metal target), even if internally we
1823 consider that a single-threaded target, mentioning a new thread
1824 might be confusing to the user. Be silent then, preserving the
1825 age old behavior. */
1826 if (rs
->starting_up
)
1827 add_thread_silent (ptid
);
1831 set_executing (ptid
, executing
);
1832 set_running (ptid
, running
);
1835 /* Come here when we learn about a thread id from the remote target.
1836 It may be the first time we hear about such thread, so take the
1837 opportunity to add it to GDB's thread list. In case this is the
1838 first time we're noticing its corresponding inferior, add it to
1839 GDB's inferior list as well. EXECUTING indicates whether the
1840 thread is (internally) executing or stopped. */
1843 remote_notice_new_inferior (ptid_t currthread
, int executing
)
1845 /* In non-stop mode, we assume new found threads are (externally)
1846 running until proven otherwise with a stop reply. In all-stop,
1847 we can only get here if all threads are stopped. */
1848 int running
= target_is_non_stop_p () ? 1 : 0;
1850 /* If this is a new thread, add it to GDB's thread list.
1851 If we leave it up to WFI to do this, bad things will happen. */
1853 if (in_thread_list (currthread
) && is_exited (currthread
))
1855 /* We're seeing an event on a thread id we knew had exited.
1856 This has to be a new thread reusing the old id. Add it. */
1857 remote_add_thread (currthread
, running
, executing
);
1861 if (!in_thread_list (currthread
))
1863 struct inferior
*inf
= NULL
;
1864 int pid
= ptid_get_pid (currthread
);
1866 if (ptid_is_pid (inferior_ptid
)
1867 && pid
== ptid_get_pid (inferior_ptid
))
1869 /* inferior_ptid has no thread member yet. This can happen
1870 with the vAttach -> remote_wait,"TAAthread:" path if the
1871 stub doesn't support qC. This is the first stop reported
1872 after an attach, so this is the main thread. Update the
1873 ptid in the thread list. */
1874 if (in_thread_list (pid_to_ptid (pid
)))
1875 thread_change_ptid (inferior_ptid
, currthread
);
1878 remote_add_thread (currthread
, running
, executing
);
1879 inferior_ptid
= currthread
;
1884 if (ptid_equal (magic_null_ptid
, inferior_ptid
))
1886 /* inferior_ptid is not set yet. This can happen with the
1887 vRun -> remote_wait,"TAAthread:" path if the stub
1888 doesn't support qC. This is the first stop reported
1889 after an attach, so this is the main thread. Update the
1890 ptid in the thread list. */
1891 thread_change_ptid (inferior_ptid
, currthread
);
1895 /* When connecting to a target remote, or to a target
1896 extended-remote which already was debugging an inferior, we
1897 may not know about it yet. Add it before adding its child
1898 thread, so notifications are emitted in a sensible order. */
1899 if (!in_inferior_list (ptid_get_pid (currthread
)))
1901 struct remote_state
*rs
= get_remote_state ();
1902 int fake_pid_p
= !remote_multi_process_p (rs
);
1904 inf
= remote_add_inferior (fake_pid_p
,
1905 ptid_get_pid (currthread
), -1, 1);
1908 /* This is really a new thread. Add it. */
1909 remote_add_thread (currthread
, running
, executing
);
1911 /* If we found a new inferior, let the common code do whatever
1912 it needs to with it (e.g., read shared libraries, insert
1913 breakpoints), unless we're just setting up an all-stop
1917 struct remote_state
*rs
= get_remote_state ();
1919 if (!rs
->starting_up
)
1920 notice_new_inferior (currthread
, executing
, 0);
1925 /* Return the private thread data, creating it if necessary. */
1927 static struct private_thread_info
*
1928 demand_private_info (ptid_t ptid
)
1930 struct thread_info
*info
= find_thread_ptid (ptid
);
1936 info
->priv
= XNEW (struct private_thread_info
);
1937 info
->private_dtor
= free_private_thread_info
;
1938 info
->priv
->core
= -1;
1939 info
->priv
->extra
= NULL
;
1940 info
->priv
->name
= NULL
;
1946 /* Call this function as a result of
1947 1) A halt indication (T packet) containing a thread id
1948 2) A direct query of currthread
1949 3) Successful execution of set thread */
1952 record_currthread (struct remote_state
*rs
, ptid_t currthread
)
1954 rs
->general_thread
= currthread
;
1957 /* If 'QPassSignals' is supported, tell the remote stub what signals
1958 it can simply pass through to the inferior without reporting. */
1961 remote_pass_signals (struct target_ops
*self
,
1962 int numsigs
, unsigned char *pass_signals
)
1964 if (packet_support (PACKET_QPassSignals
) != PACKET_DISABLE
)
1966 char *pass_packet
, *p
;
1968 struct remote_state
*rs
= get_remote_state ();
1970 gdb_assert (numsigs
< 256);
1971 for (i
= 0; i
< numsigs
; i
++)
1973 if (pass_signals
[i
])
1976 pass_packet
= (char *) xmalloc (count
* 3 + strlen ("QPassSignals:") + 1);
1977 strcpy (pass_packet
, "QPassSignals:");
1978 p
= pass_packet
+ strlen (pass_packet
);
1979 for (i
= 0; i
< numsigs
; i
++)
1981 if (pass_signals
[i
])
1984 *p
++ = tohex (i
>> 4);
1985 *p
++ = tohex (i
& 15);
1994 if (!rs
->last_pass_packet
|| strcmp (rs
->last_pass_packet
, pass_packet
))
1996 putpkt (pass_packet
);
1997 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
1998 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QPassSignals
]);
1999 if (rs
->last_pass_packet
)
2000 xfree (rs
->last_pass_packet
);
2001 rs
->last_pass_packet
= pass_packet
;
2004 xfree (pass_packet
);
2008 /* If 'QCatchSyscalls' is supported, tell the remote stub
2009 to report syscalls to GDB. */
2012 remote_set_syscall_catchpoint (struct target_ops
*self
,
2013 int pid
, int needed
, int any_count
,
2014 int table_size
, int *table
)
2017 enum packet_result result
;
2020 if (packet_support (PACKET_QCatchSyscalls
) == PACKET_DISABLE
)
2022 /* Not supported. */
2026 if (needed
&& !any_count
)
2030 /* Count how many syscalls are to be caught (table[sysno] != 0). */
2031 for (i
= 0; i
< table_size
; i
++)
2040 fprintf_unfiltered (gdb_stdlog
,
2041 "remote_set_syscall_catchpoint "
2042 "pid %d needed %d any_count %d n_sysno %d\n",
2043 pid
, needed
, any_count
, n_sysno
);
2048 /* Prepare a packet with the sysno list, assuming max 8+1
2049 characters for a sysno. If the resulting packet size is too
2050 big, fallback on the non-selective packet. */
2051 const int maxpktsz
= strlen ("QCatchSyscalls:1") + n_sysno
* 9 + 1;
2053 catch_packet
= (char *) xmalloc (maxpktsz
);
2054 strcpy (catch_packet
, "QCatchSyscalls:1");
2063 /* Add in catch_packet each syscall to be caught (table[i] != 0). */
2064 for (i
= 0; i
< table_size
; i
++)
2067 p
+= xsnprintf (p
, catch_packet
+ maxpktsz
- p
, ";%x", i
);
2070 if (strlen (catch_packet
) > get_remote_packet_size ())
2072 /* catch_packet too big. Fallback to less efficient
2073 non selective mode, with GDB doing the filtering. */
2074 catch_packet
[sizeof ("QCatchSyscalls:1") - 1] = 0;
2078 catch_packet
= xstrdup ("QCatchSyscalls:0");
2081 struct cleanup
*old_chain
= make_cleanup (xfree
, catch_packet
);
2082 struct remote_state
*rs
= get_remote_state ();
2084 putpkt (catch_packet
);
2085 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2086 result
= packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QCatchSyscalls
]);
2087 do_cleanups (old_chain
);
2088 if (result
== PACKET_OK
)
2095 /* If 'QProgramSignals' is supported, tell the remote stub what
2096 signals it should pass through to the inferior when detaching. */
2099 remote_program_signals (struct target_ops
*self
,
2100 int numsigs
, unsigned char *signals
)
2102 if (packet_support (PACKET_QProgramSignals
) != PACKET_DISABLE
)
2106 struct remote_state
*rs
= get_remote_state ();
2108 gdb_assert (numsigs
< 256);
2109 for (i
= 0; i
< numsigs
; i
++)
2114 packet
= (char *) xmalloc (count
* 3 + strlen ("QProgramSignals:") + 1);
2115 strcpy (packet
, "QProgramSignals:");
2116 p
= packet
+ strlen (packet
);
2117 for (i
= 0; i
< numsigs
; i
++)
2119 if (signal_pass_state (i
))
2122 *p
++ = tohex (i
>> 4);
2123 *p
++ = tohex (i
& 15);
2132 if (!rs
->last_program_signals_packet
2133 || strcmp (rs
->last_program_signals_packet
, packet
) != 0)
2136 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2137 packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_QProgramSignals
]);
2138 xfree (rs
->last_program_signals_packet
);
2139 rs
->last_program_signals_packet
= packet
;
2146 /* If PTID is MAGIC_NULL_PTID, don't set any thread. If PTID is
2147 MINUS_ONE_PTID, set the thread to -1, so the stub returns the
2148 thread. If GEN is set, set the general thread, if not, then set
2149 the step/continue thread. */
2151 set_thread (struct ptid ptid
, int gen
)
2153 struct remote_state
*rs
= get_remote_state ();
2154 ptid_t state
= gen
? rs
->general_thread
: rs
->continue_thread
;
2155 char *buf
= rs
->buf
;
2156 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
2158 if (ptid_equal (state
, ptid
))
2162 *buf
++ = gen
? 'g' : 'c';
2163 if (ptid_equal (ptid
, magic_null_ptid
))
2164 xsnprintf (buf
, endbuf
- buf
, "0");
2165 else if (ptid_equal (ptid
, any_thread_ptid
))
2166 xsnprintf (buf
, endbuf
- buf
, "0");
2167 else if (ptid_equal (ptid
, minus_one_ptid
))
2168 xsnprintf (buf
, endbuf
- buf
, "-1");
2170 write_ptid (buf
, endbuf
, ptid
);
2172 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2174 rs
->general_thread
= ptid
;
2176 rs
->continue_thread
= ptid
;
2180 set_general_thread (struct ptid ptid
)
2182 set_thread (ptid
, 1);
2186 set_continue_thread (struct ptid ptid
)
2188 set_thread (ptid
, 0);
2191 /* Change the remote current process. Which thread within the process
2192 ends up selected isn't important, as long as it is the same process
2193 as what INFERIOR_PTID points to.
2195 This comes from that fact that there is no explicit notion of
2196 "selected process" in the protocol. The selected process for
2197 general operations is the process the selected general thread
2201 set_general_process (void)
2203 struct remote_state
*rs
= get_remote_state ();
2205 /* If the remote can't handle multiple processes, don't bother. */
2206 if (!remote_multi_process_p (rs
))
2209 /* We only need to change the remote current thread if it's pointing
2210 at some other process. */
2211 if (ptid_get_pid (rs
->general_thread
) != ptid_get_pid (inferior_ptid
))
2212 set_general_thread (inferior_ptid
);
2216 /* Return nonzero if this is the main thread that we made up ourselves
2217 to model non-threaded targets as single-threaded. */
2220 remote_thread_always_alive (struct target_ops
*ops
, ptid_t ptid
)
2222 if (ptid_equal (ptid
, magic_null_ptid
))
2223 /* The main thread is always alive. */
2226 if (ptid_get_pid (ptid
) != 0 && ptid_get_lwp (ptid
) == 0)
2227 /* The main thread is always alive. This can happen after a
2228 vAttach, if the remote side doesn't support
2235 /* Return nonzero if the thread PTID is still alive on the remote
2239 remote_thread_alive (struct target_ops
*ops
, ptid_t ptid
)
2241 struct remote_state
*rs
= get_remote_state ();
2244 /* Check if this is a thread that we made up ourselves to model
2245 non-threaded targets as single-threaded. */
2246 if (remote_thread_always_alive (ops
, ptid
))
2250 endp
= rs
->buf
+ get_remote_packet_size ();
2253 write_ptid (p
, endp
, ptid
);
2256 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2257 return (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K');
2260 /* Return a pointer to a thread name if we know it and NULL otherwise.
2261 The thread_info object owns the memory for the name. */
2264 remote_thread_name (struct target_ops
*ops
, struct thread_info
*info
)
2266 if (info
->priv
!= NULL
)
2267 return info
->priv
->name
;
2272 /* About these extended threadlist and threadinfo packets. They are
2273 variable length packets but, the fields within them are often fixed
2274 length. They are redundent enough to send over UDP as is the
2275 remote protocol in general. There is a matching unit test module
2278 /* WARNING: This threadref data structure comes from the remote O.S.,
2279 libstub protocol encoding, and remote.c. It is not particularly
2282 /* Right now, the internal structure is int. We want it to be bigger.
2283 Plan to fix this. */
2285 typedef int gdb_threadref
; /* Internal GDB thread reference. */
2287 /* gdb_ext_thread_info is an internal GDB data structure which is
2288 equivalent to the reply of the remote threadinfo packet. */
2290 struct gdb_ext_thread_info
2292 threadref threadid
; /* External form of thread reference. */
2293 int active
; /* Has state interesting to GDB?
2295 char display
[256]; /* Brief state display, name,
2296 blocked/suspended. */
2297 char shortname
[32]; /* To be used to name threads. */
2298 char more_display
[256]; /* Long info, statistics, queue depth,
2302 /* The volume of remote transfers can be limited by submitting
2303 a mask containing bits specifying the desired information.
2304 Use a union of these values as the 'selection' parameter to
2305 get_thread_info. FIXME: Make these TAG names more thread specific. */
2307 #define TAG_THREADID 1
2308 #define TAG_EXISTS 2
2309 #define TAG_DISPLAY 4
2310 #define TAG_THREADNAME 8
2311 #define TAG_MOREDISPLAY 16
2313 #define BUF_THREAD_ID_SIZE (OPAQUETHREADBYTES * 2)
2315 static char *unpack_nibble (char *buf
, int *val
);
2317 static char *unpack_byte (char *buf
, int *value
);
2319 static char *pack_int (char *buf
, int value
);
2321 static char *unpack_int (char *buf
, int *value
);
2323 static char *unpack_string (char *src
, char *dest
, int length
);
2325 static char *pack_threadid (char *pkt
, threadref
*id
);
2327 static char *unpack_threadid (char *inbuf
, threadref
*id
);
2329 void int_to_threadref (threadref
*id
, int value
);
2331 static int threadref_to_int (threadref
*ref
);
2333 static void copy_threadref (threadref
*dest
, threadref
*src
);
2335 static int threadmatch (threadref
*dest
, threadref
*src
);
2337 static char *pack_threadinfo_request (char *pkt
, int mode
,
2340 static int remote_unpack_thread_info_response (char *pkt
,
2341 threadref
*expectedref
,
2342 struct gdb_ext_thread_info
2346 static int remote_get_threadinfo (threadref
*threadid
,
2347 int fieldset
, /*TAG mask */
2348 struct gdb_ext_thread_info
*info
);
2350 static char *pack_threadlist_request (char *pkt
, int startflag
,
2352 threadref
*nextthread
);
2354 static int parse_threadlist_response (char *pkt
,
2356 threadref
*original_echo
,
2357 threadref
*resultlist
,
2360 static int remote_get_threadlist (int startflag
,
2361 threadref
*nextthread
,
2365 threadref
*threadlist
);
2367 typedef int (*rmt_thread_action
) (threadref
*ref
, void *context
);
2369 static int remote_threadlist_iterator (rmt_thread_action stepfunction
,
2370 void *context
, int looplimit
);
2372 static int remote_newthread_step (threadref
*ref
, void *context
);
2375 /* Write a PTID to BUF. ENDBUF points to one-passed-the-end of the
2376 buffer we're allowed to write to. Returns
2377 BUF+CHARACTERS_WRITTEN. */
2380 write_ptid (char *buf
, const char *endbuf
, ptid_t ptid
)
2383 struct remote_state
*rs
= get_remote_state ();
2385 if (remote_multi_process_p (rs
))
2387 pid
= ptid_get_pid (ptid
);
2389 buf
+= xsnprintf (buf
, endbuf
- buf
, "p-%x.", -pid
);
2391 buf
+= xsnprintf (buf
, endbuf
- buf
, "p%x.", pid
);
2393 tid
= ptid_get_lwp (ptid
);
2395 buf
+= xsnprintf (buf
, endbuf
- buf
, "-%x", -tid
);
2397 buf
+= xsnprintf (buf
, endbuf
- buf
, "%x", tid
);
2402 /* Extract a PTID from BUF. If non-null, OBUF is set to the to one
2403 passed the last parsed char. Returns null_ptid on error. */
2406 read_ptid (char *buf
, char **obuf
)
2410 ULONGEST pid
= 0, tid
= 0;
2414 /* Multi-process ptid. */
2415 pp
= unpack_varlen_hex (p
+ 1, &pid
);
2417 error (_("invalid remote ptid: %s"), p
);
2420 pp
= unpack_varlen_hex (p
+ 1, &tid
);
2423 return ptid_build (pid
, tid
, 0);
2426 /* No multi-process. Just a tid. */
2427 pp
= unpack_varlen_hex (p
, &tid
);
2429 /* Return null_ptid when no thread id is found. */
2437 /* Since the stub is not sending a process id, then default to
2438 what's in inferior_ptid, unless it's null at this point. If so,
2439 then since there's no way to know the pid of the reported
2440 threads, use the magic number. */
2441 if (ptid_equal (inferior_ptid
, null_ptid
))
2442 pid
= ptid_get_pid (magic_null_ptid
);
2444 pid
= ptid_get_pid (inferior_ptid
);
2448 return ptid_build (pid
, tid
, 0);
2454 if (ch
>= 'a' && ch
<= 'f')
2455 return ch
- 'a' + 10;
2456 if (ch
>= '0' && ch
<= '9')
2458 if (ch
>= 'A' && ch
<= 'F')
2459 return ch
- 'A' + 10;
2464 stub_unpack_int (char *buff
, int fieldlength
)
2471 nibble
= stubhex (*buff
++);
2475 retval
= retval
<< 4;
2481 unpack_nibble (char *buf
, int *val
)
2483 *val
= fromhex (*buf
++);
2488 unpack_byte (char *buf
, int *value
)
2490 *value
= stub_unpack_int (buf
, 2);
2495 pack_int (char *buf
, int value
)
2497 buf
= pack_hex_byte (buf
, (value
>> 24) & 0xff);
2498 buf
= pack_hex_byte (buf
, (value
>> 16) & 0xff);
2499 buf
= pack_hex_byte (buf
, (value
>> 8) & 0x0ff);
2500 buf
= pack_hex_byte (buf
, (value
& 0xff));
2505 unpack_int (char *buf
, int *value
)
2507 *value
= stub_unpack_int (buf
, 8);
2511 #if 0 /* Currently unused, uncomment when needed. */
2512 static char *pack_string (char *pkt
, char *string
);
2515 pack_string (char *pkt
, char *string
)
2520 len
= strlen (string
);
2522 len
= 200; /* Bigger than most GDB packets, junk??? */
2523 pkt
= pack_hex_byte (pkt
, len
);
2527 if ((ch
== '\0') || (ch
== '#'))
2528 ch
= '*'; /* Protect encapsulation. */
2533 #endif /* 0 (unused) */
2536 unpack_string (char *src
, char *dest
, int length
)
2545 pack_threadid (char *pkt
, threadref
*id
)
2548 unsigned char *altid
;
2550 altid
= (unsigned char *) id
;
2551 limit
= pkt
+ BUF_THREAD_ID_SIZE
;
2553 pkt
= pack_hex_byte (pkt
, *altid
++);
2559 unpack_threadid (char *inbuf
, threadref
*id
)
2562 char *limit
= inbuf
+ BUF_THREAD_ID_SIZE
;
2565 altref
= (char *) id
;
2567 while (inbuf
< limit
)
2569 x
= stubhex (*inbuf
++);
2570 y
= stubhex (*inbuf
++);
2571 *altref
++ = (x
<< 4) | y
;
2576 /* Externally, threadrefs are 64 bits but internally, they are still
2577 ints. This is due to a mismatch of specifications. We would like
2578 to use 64bit thread references internally. This is an adapter
2582 int_to_threadref (threadref
*id
, int value
)
2584 unsigned char *scan
;
2586 scan
= (unsigned char *) id
;
2592 *scan
++ = (value
>> 24) & 0xff;
2593 *scan
++ = (value
>> 16) & 0xff;
2594 *scan
++ = (value
>> 8) & 0xff;
2595 *scan
++ = (value
& 0xff);
2599 threadref_to_int (threadref
*ref
)
2602 unsigned char *scan
;
2608 value
= (value
<< 8) | ((*scan
++) & 0xff);
2613 copy_threadref (threadref
*dest
, threadref
*src
)
2616 unsigned char *csrc
, *cdest
;
2618 csrc
= (unsigned char *) src
;
2619 cdest
= (unsigned char *) dest
;
2626 threadmatch (threadref
*dest
, threadref
*src
)
2628 /* Things are broken right now, so just assume we got a match. */
2630 unsigned char *srcp
, *destp
;
2632 srcp
= (char *) src
;
2633 destp
= (char *) dest
;
2637 result
&= (*srcp
++ == *destp
++) ? 1 : 0;
2644 threadid:1, # always request threadid
2651 /* Encoding: 'Q':8,'P':8,mask:32,threadid:64 */
2654 pack_threadinfo_request (char *pkt
, int mode
, threadref
*id
)
2656 *pkt
++ = 'q'; /* Info Query */
2657 *pkt
++ = 'P'; /* process or thread info */
2658 pkt
= pack_int (pkt
, mode
); /* mode */
2659 pkt
= pack_threadid (pkt
, id
); /* threadid */
2660 *pkt
= '\0'; /* terminate */
2664 /* These values tag the fields in a thread info response packet. */
2665 /* Tagging the fields allows us to request specific fields and to
2666 add more fields as time goes by. */
2668 #define TAG_THREADID 1 /* Echo the thread identifier. */
2669 #define TAG_EXISTS 2 /* Is this process defined enough to
2670 fetch registers and its stack? */
2671 #define TAG_DISPLAY 4 /* A short thing maybe to put on a window */
2672 #define TAG_THREADNAME 8 /* string, maps 1-to-1 with a thread is. */
2673 #define TAG_MOREDISPLAY 16 /* Whatever the kernel wants to say about
2677 remote_unpack_thread_info_response (char *pkt
, threadref
*expectedref
,
2678 struct gdb_ext_thread_info
*info
)
2680 struct remote_state
*rs
= get_remote_state ();
2684 char *limit
= pkt
+ rs
->buf_size
; /* Plausible parsing limit. */
2687 /* info->threadid = 0; FIXME: implement zero_threadref. */
2689 info
->display
[0] = '\0';
2690 info
->shortname
[0] = '\0';
2691 info
->more_display
[0] = '\0';
2693 /* Assume the characters indicating the packet type have been
2695 pkt
= unpack_int (pkt
, &mask
); /* arg mask */
2696 pkt
= unpack_threadid (pkt
, &ref
);
2699 warning (_("Incomplete response to threadinfo request."));
2700 if (!threadmatch (&ref
, expectedref
))
2701 { /* This is an answer to a different request. */
2702 warning (_("ERROR RMT Thread info mismatch."));
2705 copy_threadref (&info
->threadid
, &ref
);
2707 /* Loop on tagged fields , try to bail if somthing goes wrong. */
2709 /* Packets are terminated with nulls. */
2710 while ((pkt
< limit
) && mask
&& *pkt
)
2712 pkt
= unpack_int (pkt
, &tag
); /* tag */
2713 pkt
= unpack_byte (pkt
, &length
); /* length */
2714 if (!(tag
& mask
)) /* Tags out of synch with mask. */
2716 warning (_("ERROR RMT: threadinfo tag mismatch."));
2720 if (tag
== TAG_THREADID
)
2724 warning (_("ERROR RMT: length of threadid is not 16."));
2728 pkt
= unpack_threadid (pkt
, &ref
);
2729 mask
= mask
& ~TAG_THREADID
;
2732 if (tag
== TAG_EXISTS
)
2734 info
->active
= stub_unpack_int (pkt
, length
);
2736 mask
= mask
& ~(TAG_EXISTS
);
2739 warning (_("ERROR RMT: 'exists' length too long."));
2745 if (tag
== TAG_THREADNAME
)
2747 pkt
= unpack_string (pkt
, &info
->shortname
[0], length
);
2748 mask
= mask
& ~TAG_THREADNAME
;
2751 if (tag
== TAG_DISPLAY
)
2753 pkt
= unpack_string (pkt
, &info
->display
[0], length
);
2754 mask
= mask
& ~TAG_DISPLAY
;
2757 if (tag
== TAG_MOREDISPLAY
)
2759 pkt
= unpack_string (pkt
, &info
->more_display
[0], length
);
2760 mask
= mask
& ~TAG_MOREDISPLAY
;
2763 warning (_("ERROR RMT: unknown thread info tag."));
2764 break; /* Not a tag we know about. */
2770 remote_get_threadinfo (threadref
*threadid
, int fieldset
, /* TAG mask */
2771 struct gdb_ext_thread_info
*info
)
2773 struct remote_state
*rs
= get_remote_state ();
2776 pack_threadinfo_request (rs
->buf
, fieldset
, threadid
);
2778 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2780 if (rs
->buf
[0] == '\0')
2783 result
= remote_unpack_thread_info_response (rs
->buf
+ 2,
2788 /* Format: i'Q':8,i"L":8,initflag:8,batchsize:16,lastthreadid:32 */
2791 pack_threadlist_request (char *pkt
, int startflag
, int threadcount
,
2792 threadref
*nextthread
)
2794 *pkt
++ = 'q'; /* info query packet */
2795 *pkt
++ = 'L'; /* Process LIST or threadLIST request */
2796 pkt
= pack_nibble (pkt
, startflag
); /* initflag 1 bytes */
2797 pkt
= pack_hex_byte (pkt
, threadcount
); /* threadcount 2 bytes */
2798 pkt
= pack_threadid (pkt
, nextthread
); /* 64 bit thread identifier */
2803 /* Encoding: 'q':8,'M':8,count:16,done:8,argthreadid:64,(threadid:64)* */
2806 parse_threadlist_response (char *pkt
, int result_limit
,
2807 threadref
*original_echo
, threadref
*resultlist
,
2810 struct remote_state
*rs
= get_remote_state ();
2812 int count
, resultcount
, done
;
2815 /* Assume the 'q' and 'M chars have been stripped. */
2816 limit
= pkt
+ (rs
->buf_size
- BUF_THREAD_ID_SIZE
);
2817 /* done parse past here */
2818 pkt
= unpack_byte (pkt
, &count
); /* count field */
2819 pkt
= unpack_nibble (pkt
, &done
);
2820 /* The first threadid is the argument threadid. */
2821 pkt
= unpack_threadid (pkt
, original_echo
); /* should match query packet */
2822 while ((count
-- > 0) && (pkt
< limit
))
2824 pkt
= unpack_threadid (pkt
, resultlist
++);
2825 if (resultcount
++ >= result_limit
)
2833 /* Fetch the next batch of threads from the remote. Returns -1 if the
2834 qL packet is not supported, 0 on error and 1 on success. */
2837 remote_get_threadlist (int startflag
, threadref
*nextthread
, int result_limit
,
2838 int *done
, int *result_count
, threadref
*threadlist
)
2840 struct remote_state
*rs
= get_remote_state ();
2843 /* Trancate result limit to be smaller than the packet size. */
2844 if ((((result_limit
+ 1) * BUF_THREAD_ID_SIZE
) + 10)
2845 >= get_remote_packet_size ())
2846 result_limit
= (get_remote_packet_size () / BUF_THREAD_ID_SIZE
) - 2;
2848 pack_threadlist_request (rs
->buf
, startflag
, result_limit
, nextthread
);
2850 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
2851 if (*rs
->buf
== '\0')
2853 /* Packet not supported. */
2858 parse_threadlist_response (rs
->buf
+ 2, result_limit
,
2859 &rs
->echo_nextthread
, threadlist
, done
);
2861 if (!threadmatch (&rs
->echo_nextthread
, nextthread
))
2863 /* FIXME: This is a good reason to drop the packet. */
2864 /* Possably, there is a duplicate response. */
2866 retransmit immediatly - race conditions
2867 retransmit after timeout - yes
2869 wait for packet, then exit
2871 warning (_("HMM: threadlist did not echo arg thread, dropping it."));
2872 return 0; /* I choose simply exiting. */
2874 if (*result_count
<= 0)
2878 warning (_("RMT ERROR : failed to get remote thread list."));
2881 return result
; /* break; */
2883 if (*result_count
> result_limit
)
2886 warning (_("RMT ERROR: threadlist response longer than requested."));
2892 /* Fetch the list of remote threads, with the qL packet, and call
2893 STEPFUNCTION for each thread found. Stops iterating and returns 1
2894 if STEPFUNCTION returns true. Stops iterating and returns 0 if the
2895 STEPFUNCTION returns false. If the packet is not supported,
2899 remote_threadlist_iterator (rmt_thread_action stepfunction
, void *context
,
2902 struct remote_state
*rs
= get_remote_state ();
2903 int done
, i
, result_count
;
2911 if (loopcount
++ > looplimit
)
2914 warning (_("Remote fetch threadlist -infinite loop-."));
2917 result
= remote_get_threadlist (startflag
, &rs
->nextthread
,
2918 MAXTHREADLISTRESULTS
,
2919 &done
, &result_count
,
2920 rs
->resultthreadlist
);
2923 /* Clear for later iterations. */
2925 /* Setup to resume next batch of thread references, set nextthread. */
2926 if (result_count
>= 1)
2927 copy_threadref (&rs
->nextthread
,
2928 &rs
->resultthreadlist
[result_count
- 1]);
2930 while (result_count
--)
2932 if (!(*stepfunction
) (&rs
->resultthreadlist
[i
++], context
))
2942 /* A thread found on the remote target. */
2944 typedef struct thread_item
2946 /* The thread's PTID. */
2949 /* The thread's extra info. May be NULL. */
2952 /* The thread's name. May be NULL. */
2955 /* The core the thread was running on. -1 if not known. */
2958 DEF_VEC_O(thread_item_t
);
2960 /* Context passed around to the various methods listing remote
2961 threads. As new threads are found, they're added to the ITEMS
2964 struct threads_listing_context
2966 /* The threads found on the remote target. */
2967 VEC (thread_item_t
) *items
;
2970 /* Discard the contents of the constructed thread listing context. */
2973 clear_threads_listing_context (void *p
)
2975 struct threads_listing_context
*context
2976 = (struct threads_listing_context
*) p
;
2978 struct thread_item
*item
;
2980 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
2982 xfree (item
->extra
);
2986 VEC_free (thread_item_t
, context
->items
);
2989 /* Remove the thread specified as the related_pid field of WS
2990 from the CONTEXT list. */
2993 threads_listing_context_remove (struct target_waitstatus
*ws
,
2994 struct threads_listing_context
*context
)
2996 struct thread_item
*item
;
2998 ptid_t child_ptid
= ws
->value
.related_pid
;
3000 for (i
= 0; VEC_iterate (thread_item_t
, context
->items
, i
, item
); ++i
)
3002 if (ptid_equal (item
->ptid
, child_ptid
))
3004 VEC_ordered_remove (thread_item_t
, context
->items
, i
);
3011 remote_newthread_step (threadref
*ref
, void *data
)
3013 struct threads_listing_context
*context
3014 = (struct threads_listing_context
*) data
;
3015 struct thread_item item
;
3016 int pid
= ptid_get_pid (inferior_ptid
);
3018 item
.ptid
= ptid_build (pid
, threadref_to_int (ref
), 0);
3023 VEC_safe_push (thread_item_t
, context
->items
, &item
);
3025 return 1; /* continue iterator */
3028 #define CRAZY_MAX_THREADS 1000
3031 remote_current_thread (ptid_t oldpid
)
3033 struct remote_state
*rs
= get_remote_state ();
3036 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3037 if (rs
->buf
[0] == 'Q' && rs
->buf
[1] == 'C')
3042 result
= read_ptid (&rs
->buf
[2], &obuf
);
3043 if (*obuf
!= '\0' && remote_debug
)
3044 fprintf_unfiltered (gdb_stdlog
,
3045 "warning: garbage in qC reply\n");
3053 /* List remote threads using the deprecated qL packet. */
3056 remote_get_threads_with_ql (struct target_ops
*ops
,
3057 struct threads_listing_context
*context
)
3059 if (remote_threadlist_iterator (remote_newthread_step
, context
,
3060 CRAZY_MAX_THREADS
) >= 0)
3066 #if defined(HAVE_LIBEXPAT)
3069 start_thread (struct gdb_xml_parser
*parser
,
3070 const struct gdb_xml_element
*element
,
3071 void *user_data
, VEC(gdb_xml_value_s
) *attributes
)
3073 struct threads_listing_context
*data
3074 = (struct threads_listing_context
*) user_data
;
3076 struct thread_item item
;
3078 struct gdb_xml_value
*attr
;
3080 id
= (char *) xml_find_attribute (attributes
, "id")->value
;
3081 item
.ptid
= read_ptid (id
, NULL
);
3083 attr
= xml_find_attribute (attributes
, "core");
3085 item
.core
= *(ULONGEST
*) attr
->value
;
3089 attr
= xml_find_attribute (attributes
, "name");
3090 item
.name
= attr
!= NULL
? xstrdup ((const char *) attr
->value
) : NULL
;
3094 VEC_safe_push (thread_item_t
, data
->items
, &item
);
3098 end_thread (struct gdb_xml_parser
*parser
,
3099 const struct gdb_xml_element
*element
,
3100 void *user_data
, const char *body_text
)
3102 struct threads_listing_context
*data
3103 = (struct threads_listing_context
*) user_data
;
3105 if (body_text
&& *body_text
)
3106 VEC_last (thread_item_t
, data
->items
)->extra
= xstrdup (body_text
);
3109 const struct gdb_xml_attribute thread_attributes
[] = {
3110 { "id", GDB_XML_AF_NONE
, NULL
, NULL
},
3111 { "core", GDB_XML_AF_OPTIONAL
, gdb_xml_parse_attr_ulongest
, NULL
},
3112 { "name", GDB_XML_AF_OPTIONAL
, NULL
, NULL
},
3113 { NULL
, GDB_XML_AF_NONE
, NULL
, NULL
}
3116 const struct gdb_xml_element thread_children
[] = {
3117 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3120 const struct gdb_xml_element threads_children
[] = {
3121 { "thread", thread_attributes
, thread_children
,
3122 GDB_XML_EF_REPEATABLE
| GDB_XML_EF_OPTIONAL
,
3123 start_thread
, end_thread
},
3124 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3127 const struct gdb_xml_element threads_elements
[] = {
3128 { "threads", NULL
, threads_children
,
3129 GDB_XML_EF_NONE
, NULL
, NULL
},
3130 { NULL
, NULL
, NULL
, GDB_XML_EF_NONE
, NULL
, NULL
}
3135 /* List remote threads using qXfer:threads:read. */
3138 remote_get_threads_with_qxfer (struct target_ops
*ops
,
3139 struct threads_listing_context
*context
)
3141 #if defined(HAVE_LIBEXPAT)
3142 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3144 char *xml
= target_read_stralloc (ops
, TARGET_OBJECT_THREADS
, NULL
);
3145 struct cleanup
*back_to
= make_cleanup (xfree
, xml
);
3147 if (xml
!= NULL
&& *xml
!= '\0')
3149 gdb_xml_parse_quick (_("threads"), "threads.dtd",
3150 threads_elements
, xml
, context
);
3153 do_cleanups (back_to
);
3161 /* List remote threads using qfThreadInfo/qsThreadInfo. */
3164 remote_get_threads_with_qthreadinfo (struct target_ops
*ops
,
3165 struct threads_listing_context
*context
)
3167 struct remote_state
*rs
= get_remote_state ();
3169 if (rs
->use_threadinfo_query
)
3173 putpkt ("qfThreadInfo");
3174 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3176 if (bufp
[0] != '\0') /* q packet recognized */
3178 while (*bufp
++ == 'm') /* reply contains one or more TID */
3182 struct thread_item item
;
3184 item
.ptid
= read_ptid (bufp
, &bufp
);
3189 VEC_safe_push (thread_item_t
, context
->items
, &item
);
3191 while (*bufp
++ == ','); /* comma-separated list */
3192 putpkt ("qsThreadInfo");
3193 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3200 /* Packet not recognized. */
3201 rs
->use_threadinfo_query
= 0;
3208 /* Implement the to_update_thread_list function for the remote
3212 remote_update_thread_list (struct target_ops
*ops
)
3214 struct threads_listing_context context
;
3215 struct cleanup
*old_chain
;
3218 context
.items
= NULL
;
3219 old_chain
= make_cleanup (clear_threads_listing_context
, &context
);
3221 /* We have a few different mechanisms to fetch the thread list. Try
3222 them all, starting with the most preferred one first, falling
3223 back to older methods. */
3224 if (remote_get_threads_with_qxfer (ops
, &context
)
3225 || remote_get_threads_with_qthreadinfo (ops
, &context
)
3226 || remote_get_threads_with_ql (ops
, &context
))
3229 struct thread_item
*item
;
3230 struct thread_info
*tp
, *tmp
;
3234 if (VEC_empty (thread_item_t
, context
.items
)
3235 && remote_thread_always_alive (ops
, inferior_ptid
))
3237 /* Some targets don't really support threads, but still
3238 reply an (empty) thread list in response to the thread
3239 listing packets, instead of replying "packet not
3240 supported". Exit early so we don't delete the main
3242 do_cleanups (old_chain
);
3246 /* CONTEXT now holds the current thread list on the remote
3247 target end. Delete GDB-side threads no longer found on the
3249 ALL_THREADS_SAFE (tp
, tmp
)
3252 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
3255 if (ptid_equal (item
->ptid
, tp
->ptid
))
3259 if (i
== VEC_length (thread_item_t
, context
.items
))
3262 delete_thread (tp
->ptid
);
3266 /* Remove any unreported fork child threads from CONTEXT so
3267 that we don't interfere with follow fork, which is where
3268 creation of such threads is handled. */
3269 remove_new_fork_children (&context
);
3271 /* And now add threads we don't know about yet to our list. */
3273 VEC_iterate (thread_item_t
, context
.items
, i
, item
);
3276 if (!ptid_equal (item
->ptid
, null_ptid
))
3278 struct private_thread_info
*info
;
3279 /* In non-stop mode, we assume new found threads are
3280 executing until proven otherwise with a stop reply.
3281 In all-stop, we can only get here if all threads are
3283 int executing
= target_is_non_stop_p () ? 1 : 0;
3285 remote_notice_new_inferior (item
->ptid
, executing
);
3287 info
= demand_private_info (item
->ptid
);
3288 info
->core
= item
->core
;
3289 info
->extra
= item
->extra
;
3291 info
->name
= item
->name
;
3299 /* If no thread listing method is supported, then query whether
3300 each known thread is alive, one by one, with the T packet.
3301 If the target doesn't support threads at all, then this is a
3302 no-op. See remote_thread_alive. */
3306 do_cleanups (old_chain
);
3310 * Collect a descriptive string about the given thread.
3311 * The target may say anything it wants to about the thread
3312 * (typically info about its blocked / runnable state, name, etc.).
3313 * This string will appear in the info threads display.
3315 * Optional: targets are not required to implement this function.
3319 remote_threads_extra_info (struct target_ops
*self
, struct thread_info
*tp
)
3321 struct remote_state
*rs
= get_remote_state ();
3325 struct gdb_ext_thread_info threadinfo
;
3326 static char display_buf
[100]; /* arbitrary... */
3327 int n
= 0; /* position in display_buf */
3329 if (rs
->remote_desc
== 0) /* paranoia */
3330 internal_error (__FILE__
, __LINE__
,
3331 _("remote_threads_extra_info"));
3333 if (ptid_equal (tp
->ptid
, magic_null_ptid
)
3334 || (ptid_get_pid (tp
->ptid
) != 0 && ptid_get_lwp (tp
->ptid
) == 0))
3335 /* This is the main thread which was added by GDB. The remote
3336 server doesn't know about it. */
3339 if (packet_support (PACKET_qXfer_threads
) == PACKET_ENABLE
)
3341 struct thread_info
*info
= find_thread_ptid (tp
->ptid
);
3343 if (info
&& info
->priv
)
3344 return info
->priv
->extra
;
3349 if (rs
->use_threadextra_query
)
3352 char *endb
= rs
->buf
+ get_remote_packet_size ();
3354 xsnprintf (b
, endb
- b
, "qThreadExtraInfo,");
3356 write_ptid (b
, endb
, tp
->ptid
);
3359 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3360 if (rs
->buf
[0] != 0)
3362 n
= min (strlen (rs
->buf
) / 2, sizeof (display_buf
));
3363 result
= hex2bin (rs
->buf
, (gdb_byte
*) display_buf
, n
);
3364 display_buf
[result
] = '\0';
3369 /* If the above query fails, fall back to the old method. */
3370 rs
->use_threadextra_query
= 0;
3371 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
3372 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
3373 int_to_threadref (&id
, ptid_get_lwp (tp
->ptid
));
3374 if (remote_get_threadinfo (&id
, set
, &threadinfo
))
3375 if (threadinfo
.active
)
3377 if (*threadinfo
.shortname
)
3378 n
+= xsnprintf (&display_buf
[0], sizeof (display_buf
) - n
,
3379 " Name: %s,", threadinfo
.shortname
);
3380 if (*threadinfo
.display
)
3381 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3382 " State: %s,", threadinfo
.display
);
3383 if (*threadinfo
.more_display
)
3384 n
+= xsnprintf (&display_buf
[n
], sizeof (display_buf
) - n
,
3385 " Priority: %s", threadinfo
.more_display
);
3389 /* For purely cosmetic reasons, clear up trailing commas. */
3390 if (',' == display_buf
[n
-1])
3391 display_buf
[n
-1] = ' ';
3400 remote_static_tracepoint_marker_at (struct target_ops
*self
, CORE_ADDR addr
,
3401 struct static_tracepoint_marker
*marker
)
3403 struct remote_state
*rs
= get_remote_state ();
3406 xsnprintf (p
, get_remote_packet_size (), "qTSTMat:");
3408 p
+= hexnumstr (p
, addr
);
3410 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3414 error (_("Remote failure reply: %s"), p
);
3418 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3425 static VEC(static_tracepoint_marker_p
) *
3426 remote_static_tracepoint_markers_by_strid (struct target_ops
*self
,
3429 struct remote_state
*rs
= get_remote_state ();
3430 VEC(static_tracepoint_marker_p
) *markers
= NULL
;
3431 struct static_tracepoint_marker
*marker
= NULL
;
3432 struct cleanup
*old_chain
;
3435 /* Ask for a first packet of static tracepoint marker
3438 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3441 error (_("Remote failure reply: %s"), p
);
3443 old_chain
= make_cleanup (free_current_marker
, &marker
);
3448 marker
= XCNEW (struct static_tracepoint_marker
);
3452 parse_static_tracepoint_marker_definition (p
, &p
, marker
);
3454 if (strid
== NULL
|| strcmp (strid
, marker
->str_id
) == 0)
3456 VEC_safe_push (static_tracepoint_marker_p
,
3462 release_static_tracepoint_marker (marker
);
3463 memset (marker
, 0, sizeof (*marker
));
3466 while (*p
++ == ','); /* comma-separated list */
3467 /* Ask for another packet of static tracepoint definition. */
3469 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3473 do_cleanups (old_chain
);
3478 /* Implement the to_get_ada_task_ptid function for the remote targets. */
3481 remote_get_ada_task_ptid (struct target_ops
*self
, long lwp
, long thread
)
3483 return ptid_build (ptid_get_pid (inferior_ptid
), lwp
, 0);
3487 /* Restart the remote side; this is an extended protocol operation. */
3490 extended_remote_restart (void)
3492 struct remote_state
*rs
= get_remote_state ();
3494 /* Send the restart command; for reasons I don't understand the
3495 remote side really expects a number after the "R". */
3496 xsnprintf (rs
->buf
, get_remote_packet_size (), "R%x", 0);
3499 remote_fileio_reset ();
3502 /* Clean up connection to a remote debugger. */
3505 remote_close (struct target_ops
*self
)
3507 struct remote_state
*rs
= get_remote_state ();
3509 if (rs
->remote_desc
== NULL
)
3510 return; /* already closed */
3512 /* Make sure we leave stdin registered in the event loop, and we
3513 don't leave the async SIGINT signal handler installed. */
3514 remote_terminal_ours (self
);
3516 serial_close (rs
->remote_desc
);
3517 rs
->remote_desc
= NULL
;
3519 /* We don't have a connection to the remote stub anymore. Get rid
3520 of all the inferiors and their threads we were controlling.
3521 Reset inferior_ptid to null_ptid first, as otherwise has_stack_frame
3522 will be unable to find the thread corresponding to (pid, 0, 0). */
3523 inferior_ptid
= null_ptid
;
3524 discard_all_inferiors ();
3526 /* We are closing the remote target, so we should discard
3527 everything of this target. */
3528 discard_pending_stop_replies_in_queue (rs
);
3530 if (remote_async_inferior_event_token
)
3531 delete_async_event_handler (&remote_async_inferior_event_token
);
3533 remote_notif_state_xfree (rs
->notif_state
);
3535 trace_reset_local_state ();
3538 /* Query the remote side for the text, data and bss offsets. */
3543 struct remote_state
*rs
= get_remote_state ();
3546 int lose
, num_segments
= 0, do_sections
, do_segments
;
3547 CORE_ADDR text_addr
, data_addr
, bss_addr
, segments
[2];
3548 struct section_offsets
*offs
;
3549 struct symfile_segment_data
*data
;
3551 if (symfile_objfile
== NULL
)
3554 putpkt ("qOffsets");
3555 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
3558 if (buf
[0] == '\000')
3559 return; /* Return silently. Stub doesn't support
3563 warning (_("Remote failure reply: %s"), buf
);
3567 /* Pick up each field in turn. This used to be done with scanf, but
3568 scanf will make trouble if CORE_ADDR size doesn't match
3569 conversion directives correctly. The following code will work
3570 with any size of CORE_ADDR. */
3571 text_addr
= data_addr
= bss_addr
= 0;
3575 if (startswith (ptr
, "Text="))
3578 /* Don't use strtol, could lose on big values. */
3579 while (*ptr
&& *ptr
!= ';')
3580 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3582 if (startswith (ptr
, ";Data="))
3585 while (*ptr
&& *ptr
!= ';')
3586 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3591 if (!lose
&& startswith (ptr
, ";Bss="))
3594 while (*ptr
&& *ptr
!= ';')
3595 bss_addr
= (bss_addr
<< 4) + fromhex (*ptr
++);
3597 if (bss_addr
!= data_addr
)
3598 warning (_("Target reported unsupported offsets: %s"), buf
);
3603 else if (startswith (ptr
, "TextSeg="))
3606 /* Don't use strtol, could lose on big values. */
3607 while (*ptr
&& *ptr
!= ';')
3608 text_addr
= (text_addr
<< 4) + fromhex (*ptr
++);
3611 if (startswith (ptr
, ";DataSeg="))
3614 while (*ptr
&& *ptr
!= ';')
3615 data_addr
= (data_addr
<< 4) + fromhex (*ptr
++);
3623 error (_("Malformed response to offset query, %s"), buf
);
3624 else if (*ptr
!= '\0')
3625 warning (_("Target reported unsupported offsets: %s"), buf
);
3627 offs
= ((struct section_offsets
*)
3628 alloca (SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
)));
3629 memcpy (offs
, symfile_objfile
->section_offsets
,
3630 SIZEOF_N_SECTION_OFFSETS (symfile_objfile
->num_sections
));
3632 data
= get_symfile_segment_data (symfile_objfile
->obfd
);
3633 do_segments
= (data
!= NULL
);
3634 do_sections
= num_segments
== 0;
3636 if (num_segments
> 0)
3638 segments
[0] = text_addr
;
3639 segments
[1] = data_addr
;
3641 /* If we have two segments, we can still try to relocate everything
3642 by assuming that the .text and .data offsets apply to the whole
3643 text and data segments. Convert the offsets given in the packet
3644 to base addresses for symfile_map_offsets_to_segments. */
3645 else if (data
&& data
->num_segments
== 2)
3647 segments
[0] = data
->segment_bases
[0] + text_addr
;
3648 segments
[1] = data
->segment_bases
[1] + data_addr
;
3651 /* If the object file has only one segment, assume that it is text
3652 rather than data; main programs with no writable data are rare,
3653 but programs with no code are useless. Of course the code might
3654 have ended up in the data segment... to detect that we would need
3655 the permissions here. */
3656 else if (data
&& data
->num_segments
== 1)
3658 segments
[0] = data
->segment_bases
[0] + text_addr
;
3661 /* There's no way to relocate by segment. */
3667 int ret
= symfile_map_offsets_to_segments (symfile_objfile
->obfd
, data
,
3668 offs
, num_segments
, segments
);
3670 if (ret
== 0 && !do_sections
)
3671 error (_("Can not handle qOffsets TextSeg "
3672 "response with this symbol file"));
3679 free_symfile_segment_data (data
);
3683 offs
->offsets
[SECT_OFF_TEXT (symfile_objfile
)] = text_addr
;
3685 /* This is a temporary kludge to force data and bss to use the
3686 same offsets because that's what nlmconv does now. The real
3687 solution requires changes to the stub and remote.c that I
3688 don't have time to do right now. */
3690 offs
->offsets
[SECT_OFF_DATA (symfile_objfile
)] = data_addr
;
3691 offs
->offsets
[SECT_OFF_BSS (symfile_objfile
)] = data_addr
;
3694 objfile_relocate (symfile_objfile
, offs
);
3697 /* Send interrupt_sequence to remote target. */
3699 send_interrupt_sequence (void)
3701 struct remote_state
*rs
= get_remote_state ();
3703 if (interrupt_sequence_mode
== interrupt_sequence_control_c
)
3704 remote_serial_write ("\x03", 1);
3705 else if (interrupt_sequence_mode
== interrupt_sequence_break
)
3706 serial_send_break (rs
->remote_desc
);
3707 else if (interrupt_sequence_mode
== interrupt_sequence_break_g
)
3709 serial_send_break (rs
->remote_desc
);
3710 remote_serial_write ("g", 1);
3713 internal_error (__FILE__
, __LINE__
,
3714 _("Invalid value for interrupt_sequence_mode: %s."),
3715 interrupt_sequence_mode
);
3719 /* If STOP_REPLY is a T stop reply, look for the "thread" register,
3720 and extract the PTID. Returns NULL_PTID if not found. */
3723 stop_reply_extract_thread (char *stop_reply
)
3725 if (stop_reply
[0] == 'T' && strlen (stop_reply
) > 3)
3729 /* Txx r:val ; r:val (...) */
3732 /* Look for "register" named "thread". */
3737 p1
= strchr (p
, ':');
3741 if (strncmp (p
, "thread", p1
- p
) == 0)
3742 return read_ptid (++p1
, &p
);
3744 p1
= strchr (p
, ';');
3756 /* Determine the remote side's current thread. If we have a stop
3757 reply handy (in WAIT_STATUS), maybe it's a T stop reply with a
3758 "thread" register we can extract the current thread from. If not,
3759 ask the remote which is the current thread with qC. The former
3760 method avoids a roundtrip. */
3763 get_current_thread (char *wait_status
)
3765 ptid_t ptid
= null_ptid
;
3767 /* Note we don't use remote_parse_stop_reply as that makes use of
3768 the target architecture, which we haven't yet fully determined at
3770 if (wait_status
!= NULL
)
3771 ptid
= stop_reply_extract_thread (wait_status
);
3772 if (ptid_equal (ptid
, null_ptid
))
3773 ptid
= remote_current_thread (inferior_ptid
);
3778 /* Query the remote target for which is the current thread/process,
3779 add it to our tables, and update INFERIOR_PTID. The caller is
3780 responsible for setting the state such that the remote end is ready
3781 to return the current thread.
3783 This function is called after handling the '?' or 'vRun' packets,
3784 whose response is a stop reply from which we can also try
3785 extracting the thread. If the target doesn't support the explicit
3786 qC query, we infer the current thread from that stop reply, passed
3787 in in WAIT_STATUS, which may be NULL. */
3790 add_current_inferior_and_thread (char *wait_status
)
3792 struct remote_state
*rs
= get_remote_state ();
3796 inferior_ptid
= null_ptid
;
3798 /* Now, if we have thread information, update inferior_ptid. */
3799 ptid
= get_current_thread (wait_status
);
3801 if (!ptid_equal (ptid
, null_ptid
))
3803 if (!remote_multi_process_p (rs
))
3806 inferior_ptid
= ptid
;
3810 /* Without this, some commands which require an active target
3811 (such as kill) won't work. This variable serves (at least)
3812 double duty as both the pid of the target process (if it has
3813 such), and as a flag indicating that a target is active. */
3814 inferior_ptid
= magic_null_ptid
;
3818 remote_add_inferior (fake_pid_p
, ptid_get_pid (inferior_ptid
), -1, 1);
3820 /* Add the main thread. */
3821 add_thread_silent (inferior_ptid
);
3824 /* Print info about a thread that was found already stopped on
3828 print_one_stopped_thread (struct thread_info
*thread
)
3830 struct target_waitstatus
*ws
= &thread
->suspend
.waitstatus
;
3832 switch_to_thread (thread
->ptid
);
3833 stop_pc
= get_frame_pc (get_current_frame ());
3834 set_current_sal_from_frame (get_current_frame ());
3836 thread
->suspend
.waitstatus_pending_p
= 0;
3838 if (ws
->kind
== TARGET_WAITKIND_STOPPED
)
3840 enum gdb_signal sig
= ws
->value
.sig
;
3842 if (signal_print_state (sig
))
3843 observer_notify_signal_received (sig
);
3845 observer_notify_normal_stop (NULL
, 1);
3848 /* Process all initial stop replies the remote side sent in response
3849 to the ? packet. These indicate threads that were already stopped
3850 on initial connection. We mark these threads as stopped and print
3851 their current frame before giving the user the prompt. */
3854 process_initial_stop_replies (int from_tty
)
3856 int pending_stop_replies
= stop_reply_queue_length ();
3857 struct inferior
*inf
;
3858 struct thread_info
*thread
;
3859 struct thread_info
*selected
= NULL
;
3860 struct thread_info
*lowest_stopped
= NULL
;
3861 struct thread_info
*first
= NULL
;
3863 /* Consume the initial pending events. */
3864 while (pending_stop_replies
-- > 0)
3866 ptid_t waiton_ptid
= minus_one_ptid
;
3868 struct target_waitstatus ws
;
3869 int ignore_event
= 0;
3870 struct thread_info
*thread
;
3872 memset (&ws
, 0, sizeof (ws
));
3873 event_ptid
= target_wait (waiton_ptid
, &ws
, TARGET_WNOHANG
);
3875 print_target_wait_results (waiton_ptid
, event_ptid
, &ws
);
3879 case TARGET_WAITKIND_IGNORE
:
3880 case TARGET_WAITKIND_NO_RESUMED
:
3881 case TARGET_WAITKIND_SIGNALLED
:
3882 case TARGET_WAITKIND_EXITED
:
3883 /* We shouldn't see these, but if we do, just ignore. */
3885 fprintf_unfiltered (gdb_stdlog
, "remote: event ignored\n");
3889 case TARGET_WAITKIND_EXECD
:
3890 xfree (ws
.value
.execd_pathname
);
3899 thread
= find_thread_ptid (event_ptid
);
3901 if (ws
.kind
== TARGET_WAITKIND_STOPPED
)
3903 enum gdb_signal sig
= ws
.value
.sig
;
3905 /* Stubs traditionally report SIGTRAP as initial signal,
3906 instead of signal 0. Suppress it. */
3907 if (sig
== GDB_SIGNAL_TRAP
)
3909 thread
->suspend
.stop_signal
= sig
;
3913 thread
->suspend
.waitstatus
= ws
;
3915 if (ws
.kind
!= TARGET_WAITKIND_STOPPED
3916 || ws
.value
.sig
!= GDB_SIGNAL_0
)
3917 thread
->suspend
.waitstatus_pending_p
= 1;
3919 set_executing (event_ptid
, 0);
3920 set_running (event_ptid
, 0);
3923 /* "Notice" the new inferiors before anything related to
3924 registers/memory. */
3930 inf
->needs_setup
= 1;
3934 thread
= any_live_thread_of_process (inf
->pid
);
3935 notice_new_inferior (thread
->ptid
,
3936 thread
->state
== THREAD_RUNNING
,
3941 /* If all-stop on top of non-stop, pause all threads. Note this
3942 records the threads' stop pc, so must be done after "noticing"
3946 stop_all_threads ();
3948 /* If all threads of an inferior were already stopped, we
3949 haven't setup the inferior yet. */
3955 if (inf
->needs_setup
)
3957 thread
= any_live_thread_of_process (inf
->pid
);
3958 switch_to_thread_no_regs (thread
);
3964 /* Now go over all threads that are stopped, and print their current
3965 frame. If all-stop, then if there's a signalled thread, pick
3967 ALL_NON_EXITED_THREADS (thread
)
3973 set_running (thread
->ptid
, 0);
3974 else if (thread
->state
!= THREAD_STOPPED
)
3977 if (selected
== NULL
3978 && thread
->suspend
.waitstatus_pending_p
)
3981 if (lowest_stopped
== NULL
3982 || thread
->inf
->num
< lowest_stopped
->inf
->num
3983 || thread
->per_inf_num
< lowest_stopped
->per_inf_num
)
3984 lowest_stopped
= thread
;
3987 print_one_stopped_thread (thread
);
3990 /* In all-stop, we only print the status of one thread, and leave
3991 others with their status pending. */
3996 thread
= lowest_stopped
;
4000 print_one_stopped_thread (thread
);
4003 /* For "info program". */
4004 thread
= inferior_thread ();
4005 if (thread
->state
== THREAD_STOPPED
)
4006 set_last_target_status (inferior_ptid
, thread
->suspend
.waitstatus
);
4010 remote_start_remote (int from_tty
, struct target_ops
*target
, int extended_p
)
4012 struct remote_state
*rs
= get_remote_state ();
4013 struct packet_config
*noack_config
;
4014 char *wait_status
= NULL
;
4016 immediate_quit
++; /* Allow user to interrupt it. */
4019 if (interrupt_on_connect
)
4020 send_interrupt_sequence ();
4022 /* Ack any packet which the remote side has already sent. */
4023 serial_write (rs
->remote_desc
, "+", 1);
4025 /* Signal other parts that we're going through the initial setup,
4026 and so things may not be stable yet. */
4027 rs
->starting_up
= 1;
4029 /* The first packet we send to the target is the optional "supported
4030 packets" request. If the target can answer this, it will tell us
4031 which later probes to skip. */
4032 remote_query_supported ();
4034 /* If the stub wants to get a QAllow, compose one and send it. */
4035 if (packet_support (PACKET_QAllow
) != PACKET_DISABLE
)
4036 remote_set_permissions (target
);
4038 /* See unknown_v_replies_ok description. */
4040 const char v_mustreplyempty
[] = "vMustReplyEmpty";
4042 putpkt (v_mustreplyempty
);
4043 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4044 if (strcmp (rs
->buf
, "OK") == 0)
4045 unknown_v_replies_ok
= 1;
4046 else if (strcmp (rs
->buf
, "") == 0)
4047 unknown_v_replies_ok
= 0;
4049 error (_("Remote replied unexpectedly to '%s': %s"), v_mustreplyempty
,
4053 /* Next, we possibly activate noack mode.
4055 If the QStartNoAckMode packet configuration is set to AUTO,
4056 enable noack mode if the stub reported a wish for it with
4059 If set to TRUE, then enable noack mode even if the stub didn't
4060 report it in qSupported. If the stub doesn't reply OK, the
4061 session ends with an error.
4063 If FALSE, then don't activate noack mode, regardless of what the
4064 stub claimed should be the default with qSupported. */
4066 noack_config
= &remote_protocol_packets
[PACKET_QStartNoAckMode
];
4067 if (packet_config_support (noack_config
) != PACKET_DISABLE
)
4069 putpkt ("QStartNoAckMode");
4070 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4071 if (packet_ok (rs
->buf
, noack_config
) == PACKET_OK
)
4077 /* Tell the remote that we are using the extended protocol. */
4079 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4082 /* Let the target know which signals it is allowed to pass down to
4084 update_signals_program_target ();
4086 /* Next, if the target can specify a description, read it. We do
4087 this before anything involving memory or registers. */
4088 target_find_description ();
4090 /* Next, now that we know something about the target, update the
4091 address spaces in the program spaces. */
4092 update_address_spaces ();
4094 /* On OSs where the list of libraries is global to all
4095 processes, we fetch them early. */
4096 if (gdbarch_has_global_solist (target_gdbarch ()))
4097 solib_add (NULL
, from_tty
, target
, auto_solib_add
);
4099 if (target_is_non_stop_p ())
4101 if (packet_support (PACKET_QNonStop
) != PACKET_ENABLE
)
4102 error (_("Non-stop mode requested, but remote "
4103 "does not support non-stop"));
4105 putpkt ("QNonStop:1");
4106 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4108 if (strcmp (rs
->buf
, "OK") != 0)
4109 error (_("Remote refused setting non-stop mode with: %s"), rs
->buf
);
4111 /* Find about threads and processes the stub is already
4112 controlling. We default to adding them in the running state.
4113 The '?' query below will then tell us about which threads are
4115 remote_update_thread_list (target
);
4117 else if (packet_support (PACKET_QNonStop
) == PACKET_ENABLE
)
4119 /* Don't assume that the stub can operate in all-stop mode.
4120 Request it explicitly. */
4121 putpkt ("QNonStop:0");
4122 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4124 if (strcmp (rs
->buf
, "OK") != 0)
4125 error (_("Remote refused setting all-stop mode with: %s"), rs
->buf
);
4128 /* Upload TSVs regardless of whether the target is running or not. The
4129 remote stub, such as GDBserver, may have some predefined or builtin
4130 TSVs, even if the target is not running. */
4131 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4133 struct uploaded_tsv
*uploaded_tsvs
= NULL
;
4135 remote_upload_trace_state_variables (target
, &uploaded_tsvs
);
4136 merge_uploaded_trace_state_variables (&uploaded_tsvs
);
4139 /* Check whether the target is running now. */
4141 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4143 if (!target_is_non_stop_p ())
4145 if (rs
->buf
[0] == 'W' || rs
->buf
[0] == 'X')
4148 error (_("The target is not running (try extended-remote?)"));
4150 /* We're connected, but not running. Drop out before we
4151 call start_remote. */
4152 rs
->starting_up
= 0;
4157 /* Save the reply for later. */
4158 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
4159 strcpy (wait_status
, rs
->buf
);
4162 /* Fetch thread list. */
4163 target_update_thread_list ();
4165 /* Let the stub know that we want it to return the thread. */
4166 set_continue_thread (minus_one_ptid
);
4168 if (thread_count () == 0)
4170 /* Target has no concept of threads at all. GDB treats
4171 non-threaded target as single-threaded; add a main
4173 add_current_inferior_and_thread (wait_status
);
4177 /* We have thread information; select the thread the target
4178 says should be current. If we're reconnecting to a
4179 multi-threaded program, this will ideally be the thread
4180 that last reported an event before GDB disconnected. */
4181 inferior_ptid
= get_current_thread (wait_status
);
4182 if (ptid_equal (inferior_ptid
, null_ptid
))
4184 /* Odd... The target was able to list threads, but not
4185 tell us which thread was current (no "thread"
4186 register in T stop reply?). Just pick the first
4187 thread in the thread list then. */
4190 fprintf_unfiltered (gdb_stdlog
,
4191 "warning: couldn't determine remote "
4192 "current thread; picking first in list.\n");
4194 inferior_ptid
= thread_list
->ptid
;
4198 /* init_wait_for_inferior should be called before get_offsets in order
4199 to manage `inserted' flag in bp loc in a correct state.
4200 breakpoint_init_inferior, called from init_wait_for_inferior, set
4201 `inserted' flag to 0, while before breakpoint_re_set, called from
4202 start_remote, set `inserted' flag to 1. In the initialization of
4203 inferior, breakpoint_init_inferior should be called first, and then
4204 breakpoint_re_set can be called. If this order is broken, state of
4205 `inserted' flag is wrong, and cause some problems on breakpoint
4207 init_wait_for_inferior ();
4209 get_offsets (); /* Get text, data & bss offsets. */
4211 /* If we could not find a description using qXfer, and we know
4212 how to do it some other way, try again. This is not
4213 supported for non-stop; it could be, but it is tricky if
4214 there are no stopped threads when we connect. */
4215 if (remote_read_description_p (target
)
4216 && gdbarch_target_desc (target_gdbarch ()) == NULL
)
4218 target_clear_description ();
4219 target_find_description ();
4222 /* Use the previously fetched status. */
4223 gdb_assert (wait_status
!= NULL
);
4224 strcpy (rs
->buf
, wait_status
);
4225 rs
->cached_wait_status
= 1;
4228 start_remote (from_tty
); /* Initialize gdb process mechanisms. */
4232 /* Clear WFI global state. Do this before finding about new
4233 threads and inferiors, and setting the current inferior.
4234 Otherwise we would clear the proceed status of the current
4235 inferior when we want its stop_soon state to be preserved
4236 (see notice_new_inferior). */
4237 init_wait_for_inferior ();
4239 /* In non-stop, we will either get an "OK", meaning that there
4240 are no stopped threads at this time; or, a regular stop
4241 reply. In the latter case, there may be more than one thread
4242 stopped --- we pull them all out using the vStopped
4244 if (strcmp (rs
->buf
, "OK") != 0)
4246 struct notif_client
*notif
= ¬if_client_stop
;
4248 /* remote_notif_get_pending_replies acks this one, and gets
4250 rs
->notif_state
->pending_event
[notif_client_stop
.id
]
4251 = remote_notif_parse (notif
, rs
->buf
);
4252 remote_notif_get_pending_events (notif
);
4255 if (thread_count () == 0)
4258 error (_("The target is not running (try extended-remote?)"));
4260 /* We're connected, but not running. Drop out before we
4261 call start_remote. */
4262 rs
->starting_up
= 0;
4266 /* In non-stop mode, any cached wait status will be stored in
4267 the stop reply queue. */
4268 gdb_assert (wait_status
== NULL
);
4270 /* Report all signals during attach/startup. */
4271 remote_pass_signals (target
, 0, NULL
);
4273 /* If there are already stopped threads, mark them stopped and
4274 report their stops before giving the prompt to the user. */
4275 process_initial_stop_replies (from_tty
);
4277 if (target_can_async_p ())
4281 /* If we connected to a live target, do some additional setup. */
4282 if (target_has_execution
)
4284 if (symfile_objfile
) /* No use without a symbol-file. */
4285 remote_check_symbols ();
4288 /* Possibly the target has been engaged in a trace run started
4289 previously; find out where things are at. */
4290 if (remote_get_trace_status (target
, current_trace_status ()) != -1)
4292 struct uploaded_tp
*uploaded_tps
= NULL
;
4294 if (current_trace_status ()->running
)
4295 printf_filtered (_("Trace is already running on the target.\n"));
4297 remote_upload_tracepoints (target
, &uploaded_tps
);
4299 merge_uploaded_tracepoints (&uploaded_tps
);
4302 /* The thread and inferior lists are now synchronized with the
4303 target, our symbols have been relocated, and we're merged the
4304 target's tracepoints with ours. We're done with basic start
4306 rs
->starting_up
= 0;
4308 /* Maybe breakpoints are global and need to be inserted now. */
4309 if (breakpoints_should_be_inserted_now ())
4310 insert_breakpoints ();
4313 /* Open a connection to a remote debugger.
4314 NAME is the filename used for communication. */
4317 remote_open (const char *name
, int from_tty
)
4319 remote_open_1 (name
, from_tty
, &remote_ops
, 0);
4322 /* Open a connection to a remote debugger using the extended
4323 remote gdb protocol. NAME is the filename used for communication. */
4326 extended_remote_open (const char *name
, int from_tty
)
4328 remote_open_1 (name
, from_tty
, &extended_remote_ops
, 1 /*extended_p */);
4331 /* Reset all packets back to "unknown support". Called when opening a
4332 new connection to a remote target. */
4335 reset_all_packet_configs_support (void)
4339 for (i
= 0; i
< PACKET_MAX
; i
++)
4340 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4343 /* Initialize all packet configs. */
4346 init_all_packet_configs (void)
4350 for (i
= 0; i
< PACKET_MAX
; i
++)
4352 remote_protocol_packets
[i
].detect
= AUTO_BOOLEAN_AUTO
;
4353 remote_protocol_packets
[i
].support
= PACKET_SUPPORT_UNKNOWN
;
4357 /* Symbol look-up. */
4360 remote_check_symbols (void)
4362 struct remote_state
*rs
= get_remote_state ();
4363 char *msg
, *reply
, *tmp
;
4366 struct cleanup
*old_chain
;
4368 /* The remote side has no concept of inferiors that aren't running
4369 yet, it only knows about running processes. If we're connected
4370 but our current inferior is not running, we should not invite the
4371 remote target to request symbol lookups related to its
4372 (unrelated) current process. */
4373 if (!target_has_execution
)
4376 if (packet_support (PACKET_qSymbol
) == PACKET_DISABLE
)
4379 /* Make sure the remote is pointing at the right process. Note
4380 there's no way to select "no process". */
4381 set_general_process ();
4383 /* Allocate a message buffer. We can't reuse the input buffer in RS,
4384 because we need both at the same time. */
4385 msg
= (char *) xmalloc (get_remote_packet_size ());
4386 old_chain
= make_cleanup (xfree
, msg
);
4387 reply
= (char *) xmalloc (get_remote_packet_size ());
4388 make_cleanup (free_current_contents
, &reply
);
4389 reply_size
= get_remote_packet_size ();
4391 /* Invite target to request symbol lookups. */
4393 putpkt ("qSymbol::");
4394 getpkt (&reply
, &reply_size
, 0);
4395 packet_ok (reply
, &remote_protocol_packets
[PACKET_qSymbol
]);
4397 while (startswith (reply
, "qSymbol:"))
4399 struct bound_minimal_symbol sym
;
4402 end
= hex2bin (tmp
, (gdb_byte
*) msg
, strlen (tmp
) / 2);
4404 sym
= lookup_minimal_symbol (msg
, NULL
, NULL
);
4405 if (sym
.minsym
== NULL
)
4406 xsnprintf (msg
, get_remote_packet_size (), "qSymbol::%s", &reply
[8]);
4409 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
4410 CORE_ADDR sym_addr
= BMSYMBOL_VALUE_ADDRESS (sym
);
4412 /* If this is a function address, return the start of code
4413 instead of any data function descriptor. */
4414 sym_addr
= gdbarch_convert_from_func_ptr_addr (target_gdbarch (),
4418 xsnprintf (msg
, get_remote_packet_size (), "qSymbol:%s:%s",
4419 phex_nz (sym_addr
, addr_size
), &reply
[8]);
4423 getpkt (&reply
, &reply_size
, 0);
4426 do_cleanups (old_chain
);
4429 static struct serial
*
4430 remote_serial_open (const char *name
)
4432 static int udp_warning
= 0;
4434 /* FIXME: Parsing NAME here is a hack. But we want to warn here instead
4435 of in ser-tcp.c, because it is the remote protocol assuming that the
4436 serial connection is reliable and not the serial connection promising
4438 if (!udp_warning
&& startswith (name
, "udp:"))
4440 warning (_("The remote protocol may be unreliable over UDP.\n"
4441 "Some events may be lost, rendering further debugging "
4446 return serial_open (name
);
4449 /* Inform the target of our permission settings. The permission flags
4450 work without this, but if the target knows the settings, it can do
4451 a couple things. First, it can add its own check, to catch cases
4452 that somehow manage to get by the permissions checks in target
4453 methods. Second, if the target is wired to disallow particular
4454 settings (for instance, a system in the field that is not set up to
4455 be able to stop at a breakpoint), it can object to any unavailable
4459 remote_set_permissions (struct target_ops
*self
)
4461 struct remote_state
*rs
= get_remote_state ();
4463 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAllow:"
4464 "WriteReg:%x;WriteMem:%x;"
4465 "InsertBreak:%x;InsertTrace:%x;"
4466 "InsertFastTrace:%x;Stop:%x",
4467 may_write_registers
, may_write_memory
,
4468 may_insert_breakpoints
, may_insert_tracepoints
,
4469 may_insert_fast_tracepoints
, may_stop
);
4471 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4473 /* If the target didn't like the packet, warn the user. Do not try
4474 to undo the user's settings, that would just be maddening. */
4475 if (strcmp (rs
->buf
, "OK") != 0)
4476 warning (_("Remote refused setting permissions with: %s"), rs
->buf
);
4479 /* This type describes each known response to the qSupported
4481 struct protocol_feature
4483 /* The name of this protocol feature. */
4486 /* The default for this protocol feature. */
4487 enum packet_support default_support
;
4489 /* The function to call when this feature is reported, or after
4490 qSupported processing if the feature is not supported.
4491 The first argument points to this structure. The second
4492 argument indicates whether the packet requested support be
4493 enabled, disabled, or probed (or the default, if this function
4494 is being called at the end of processing and this feature was
4495 not reported). The third argument may be NULL; if not NULL, it
4496 is a NUL-terminated string taken from the packet following
4497 this feature's name and an equals sign. */
4498 void (*func
) (const struct protocol_feature
*, enum packet_support
,
4501 /* The corresponding packet for this feature. Only used if
4502 FUNC is remote_supported_packet. */
4507 remote_supported_packet (const struct protocol_feature
*feature
,
4508 enum packet_support support
,
4509 const char *argument
)
4513 warning (_("Remote qSupported response supplied an unexpected value for"
4514 " \"%s\"."), feature
->name
);
4518 remote_protocol_packets
[feature
->packet
].support
= support
;
4522 remote_packet_size (const struct protocol_feature
*feature
,
4523 enum packet_support support
, const char *value
)
4525 struct remote_state
*rs
= get_remote_state ();
4530 if (support
!= PACKET_ENABLE
)
4533 if (value
== NULL
|| *value
== '\0')
4535 warning (_("Remote target reported \"%s\" without a size."),
4541 packet_size
= strtol (value
, &value_end
, 16);
4542 if (errno
!= 0 || *value_end
!= '\0' || packet_size
< 0)
4544 warning (_("Remote target reported \"%s\" with a bad size: \"%s\"."),
4545 feature
->name
, value
);
4549 /* Record the new maximum packet size. */
4550 rs
->explicit_packet_size
= packet_size
;
4553 static const struct protocol_feature remote_protocol_features
[] = {
4554 { "PacketSize", PACKET_DISABLE
, remote_packet_size
, -1 },
4555 { "qXfer:auxv:read", PACKET_DISABLE
, remote_supported_packet
,
4556 PACKET_qXfer_auxv
},
4557 { "qXfer:exec-file:read", PACKET_DISABLE
, remote_supported_packet
,
4558 PACKET_qXfer_exec_file
},
4559 { "qXfer:features:read", PACKET_DISABLE
, remote_supported_packet
,
4560 PACKET_qXfer_features
},
4561 { "qXfer:libraries:read", PACKET_DISABLE
, remote_supported_packet
,
4562 PACKET_qXfer_libraries
},
4563 { "qXfer:libraries-svr4:read", PACKET_DISABLE
, remote_supported_packet
,
4564 PACKET_qXfer_libraries_svr4
},
4565 { "augmented-libraries-svr4-read", PACKET_DISABLE
,
4566 remote_supported_packet
, PACKET_augmented_libraries_svr4_read_feature
},
4567 { "qXfer:memory-map:read", PACKET_DISABLE
, remote_supported_packet
,
4568 PACKET_qXfer_memory_map
},
4569 { "qXfer:spu:read", PACKET_DISABLE
, remote_supported_packet
,
4570 PACKET_qXfer_spu_read
},
4571 { "qXfer:spu:write", PACKET_DISABLE
, remote_supported_packet
,
4572 PACKET_qXfer_spu_write
},
4573 { "qXfer:osdata:read", PACKET_DISABLE
, remote_supported_packet
,
4574 PACKET_qXfer_osdata
},
4575 { "qXfer:threads:read", PACKET_DISABLE
, remote_supported_packet
,
4576 PACKET_qXfer_threads
},
4577 { "qXfer:traceframe-info:read", PACKET_DISABLE
, remote_supported_packet
,
4578 PACKET_qXfer_traceframe_info
},
4579 { "QPassSignals", PACKET_DISABLE
, remote_supported_packet
,
4580 PACKET_QPassSignals
},
4581 { "QCatchSyscalls", PACKET_DISABLE
, remote_supported_packet
,
4582 PACKET_QCatchSyscalls
},
4583 { "QProgramSignals", PACKET_DISABLE
, remote_supported_packet
,
4584 PACKET_QProgramSignals
},
4585 { "QStartNoAckMode", PACKET_DISABLE
, remote_supported_packet
,
4586 PACKET_QStartNoAckMode
},
4587 { "multiprocess", PACKET_DISABLE
, remote_supported_packet
,
4588 PACKET_multiprocess_feature
},
4589 { "QNonStop", PACKET_DISABLE
, remote_supported_packet
, PACKET_QNonStop
},
4590 { "qXfer:siginfo:read", PACKET_DISABLE
, remote_supported_packet
,
4591 PACKET_qXfer_siginfo_read
},
4592 { "qXfer:siginfo:write", PACKET_DISABLE
, remote_supported_packet
,
4593 PACKET_qXfer_siginfo_write
},
4594 { "ConditionalTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4595 PACKET_ConditionalTracepoints
},
4596 { "ConditionalBreakpoints", PACKET_DISABLE
, remote_supported_packet
,
4597 PACKET_ConditionalBreakpoints
},
4598 { "BreakpointCommands", PACKET_DISABLE
, remote_supported_packet
,
4599 PACKET_BreakpointCommands
},
4600 { "FastTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4601 PACKET_FastTracepoints
},
4602 { "StaticTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4603 PACKET_StaticTracepoints
},
4604 {"InstallInTrace", PACKET_DISABLE
, remote_supported_packet
,
4605 PACKET_InstallInTrace
},
4606 { "DisconnectedTracing", PACKET_DISABLE
, remote_supported_packet
,
4607 PACKET_DisconnectedTracing_feature
},
4608 { "ReverseContinue", PACKET_DISABLE
, remote_supported_packet
,
4610 { "ReverseStep", PACKET_DISABLE
, remote_supported_packet
,
4612 { "TracepointSource", PACKET_DISABLE
, remote_supported_packet
,
4613 PACKET_TracepointSource
},
4614 { "QAllow", PACKET_DISABLE
, remote_supported_packet
,
4616 { "EnableDisableTracepoints", PACKET_DISABLE
, remote_supported_packet
,
4617 PACKET_EnableDisableTracepoints_feature
},
4618 { "qXfer:fdpic:read", PACKET_DISABLE
, remote_supported_packet
,
4619 PACKET_qXfer_fdpic
},
4620 { "qXfer:uib:read", PACKET_DISABLE
, remote_supported_packet
,
4622 { "QDisableRandomization", PACKET_DISABLE
, remote_supported_packet
,
4623 PACKET_QDisableRandomization
},
4624 { "QAgent", PACKET_DISABLE
, remote_supported_packet
, PACKET_QAgent
},
4625 { "QTBuffer:size", PACKET_DISABLE
,
4626 remote_supported_packet
, PACKET_QTBuffer_size
},
4627 { "tracenz", PACKET_DISABLE
, remote_supported_packet
, PACKET_tracenz_feature
},
4628 { "Qbtrace:off", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_off
},
4629 { "Qbtrace:bts", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_bts
},
4630 { "Qbtrace:pt", PACKET_DISABLE
, remote_supported_packet
, PACKET_Qbtrace_pt
},
4631 { "qXfer:btrace:read", PACKET_DISABLE
, remote_supported_packet
,
4632 PACKET_qXfer_btrace
},
4633 { "qXfer:btrace-conf:read", PACKET_DISABLE
, remote_supported_packet
,
4634 PACKET_qXfer_btrace_conf
},
4635 { "Qbtrace-conf:bts:size", PACKET_DISABLE
, remote_supported_packet
,
4636 PACKET_Qbtrace_conf_bts_size
},
4637 { "swbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_swbreak_feature
},
4638 { "hwbreak", PACKET_DISABLE
, remote_supported_packet
, PACKET_hwbreak_feature
},
4639 { "fork-events", PACKET_DISABLE
, remote_supported_packet
,
4640 PACKET_fork_event_feature
},
4641 { "vfork-events", PACKET_DISABLE
, remote_supported_packet
,
4642 PACKET_vfork_event_feature
},
4643 { "exec-events", PACKET_DISABLE
, remote_supported_packet
,
4644 PACKET_exec_event_feature
},
4645 { "Qbtrace-conf:pt:size", PACKET_DISABLE
, remote_supported_packet
,
4646 PACKET_Qbtrace_conf_pt_size
},
4647 { "vContSupported", PACKET_DISABLE
, remote_supported_packet
, PACKET_vContSupported
},
4648 { "QThreadEvents", PACKET_DISABLE
, remote_supported_packet
, PACKET_QThreadEvents
},
4649 { "no-resumed", PACKET_DISABLE
, remote_supported_packet
, PACKET_no_resumed
},
4652 static char *remote_support_xml
;
4654 /* Register string appended to "xmlRegisters=" in qSupported query. */
4657 register_remote_support_xml (const char *xml
)
4659 #if defined(HAVE_LIBEXPAT)
4660 if (remote_support_xml
== NULL
)
4661 remote_support_xml
= concat ("xmlRegisters=", xml
, (char *) NULL
);
4664 char *copy
= xstrdup (remote_support_xml
+ 13);
4665 char *p
= strtok (copy
, ",");
4669 if (strcmp (p
, xml
) == 0)
4676 while ((p
= strtok (NULL
, ",")) != NULL
);
4679 remote_support_xml
= reconcat (remote_support_xml
,
4680 remote_support_xml
, ",", xml
,
4687 remote_query_supported_append (char *msg
, const char *append
)
4690 return reconcat (msg
, msg
, ";", append
, (char *) NULL
);
4692 return xstrdup (append
);
4696 remote_query_supported (void)
4698 struct remote_state
*rs
= get_remote_state ();
4701 unsigned char seen
[ARRAY_SIZE (remote_protocol_features
)];
4703 /* The packet support flags are handled differently for this packet
4704 than for most others. We treat an error, a disabled packet, and
4705 an empty response identically: any features which must be reported
4706 to be used will be automatically disabled. An empty buffer
4707 accomplishes this, since that is also the representation for a list
4708 containing no features. */
4711 if (packet_support (PACKET_qSupported
) != PACKET_DISABLE
)
4714 struct cleanup
*old_chain
= make_cleanup (free_current_contents
, &q
);
4716 if (packet_set_cmd_state (PACKET_multiprocess_feature
) != AUTO_BOOLEAN_FALSE
)
4717 q
= remote_query_supported_append (q
, "multiprocess+");
4719 if (packet_set_cmd_state (PACKET_swbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4720 q
= remote_query_supported_append (q
, "swbreak+");
4721 if (packet_set_cmd_state (PACKET_hwbreak_feature
) != AUTO_BOOLEAN_FALSE
)
4722 q
= remote_query_supported_append (q
, "hwbreak+");
4724 q
= remote_query_supported_append (q
, "qRelocInsn+");
4726 if (packet_set_cmd_state (PACKET_fork_event_feature
)
4727 != AUTO_BOOLEAN_FALSE
)
4728 q
= remote_query_supported_append (q
, "fork-events+");
4729 if (packet_set_cmd_state (PACKET_vfork_event_feature
)
4730 != AUTO_BOOLEAN_FALSE
)
4731 q
= remote_query_supported_append (q
, "vfork-events+");
4732 if (packet_set_cmd_state (PACKET_exec_event_feature
)
4733 != AUTO_BOOLEAN_FALSE
)
4734 q
= remote_query_supported_append (q
, "exec-events+");
4736 if (packet_set_cmd_state (PACKET_vContSupported
) != AUTO_BOOLEAN_FALSE
)
4737 q
= remote_query_supported_append (q
, "vContSupported+");
4739 if (packet_set_cmd_state (PACKET_QThreadEvents
) != AUTO_BOOLEAN_FALSE
)
4740 q
= remote_query_supported_append (q
, "QThreadEvents+");
4742 if (packet_set_cmd_state (PACKET_no_resumed
) != AUTO_BOOLEAN_FALSE
)
4743 q
= remote_query_supported_append (q
, "no-resumed+");
4745 /* Keep this one last to work around a gdbserver <= 7.10 bug in
4746 the qSupported:xmlRegisters=i386 handling. */
4747 if (remote_support_xml
!= NULL
)
4748 q
= remote_query_supported_append (q
, remote_support_xml
);
4750 q
= reconcat (q
, "qSupported:", q
, (char *) NULL
);
4753 do_cleanups (old_chain
);
4755 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
4757 /* If an error occured, warn, but do not return - just reset the
4758 buffer to empty and go on to disable features. */
4759 if (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_qSupported
])
4762 warning (_("Remote failure reply: %s"), rs
->buf
);
4767 memset (seen
, 0, sizeof (seen
));
4772 enum packet_support is_supported
;
4773 char *p
, *end
, *name_end
, *value
;
4775 /* First separate out this item from the rest of the packet. If
4776 there's another item after this, we overwrite the separator
4777 (terminated strings are much easier to work with). */
4779 end
= strchr (p
, ';');
4782 end
= p
+ strlen (p
);
4792 warning (_("empty item in \"qSupported\" response"));
4797 name_end
= strchr (p
, '=');
4800 /* This is a name=value entry. */
4801 is_supported
= PACKET_ENABLE
;
4802 value
= name_end
+ 1;
4811 is_supported
= PACKET_ENABLE
;
4815 is_supported
= PACKET_DISABLE
;
4819 is_supported
= PACKET_SUPPORT_UNKNOWN
;
4823 warning (_("unrecognized item \"%s\" "
4824 "in \"qSupported\" response"), p
);
4830 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4831 if (strcmp (remote_protocol_features
[i
].name
, p
) == 0)
4833 const struct protocol_feature
*feature
;
4836 feature
= &remote_protocol_features
[i
];
4837 feature
->func (feature
, is_supported
, value
);
4842 /* If we increased the packet size, make sure to increase the global
4843 buffer size also. We delay this until after parsing the entire
4844 qSupported packet, because this is the same buffer we were
4846 if (rs
->buf_size
< rs
->explicit_packet_size
)
4848 rs
->buf_size
= rs
->explicit_packet_size
;
4849 rs
->buf
= (char *) xrealloc (rs
->buf
, rs
->buf_size
);
4852 /* Handle the defaults for unmentioned features. */
4853 for (i
= 0; i
< ARRAY_SIZE (remote_protocol_features
); i
++)
4856 const struct protocol_feature
*feature
;
4858 feature
= &remote_protocol_features
[i
];
4859 feature
->func (feature
, feature
->default_support
, NULL
);
4863 /* Remove any of the remote.c targets from target stack. Upper targets depend
4864 on it so remove them first. */
4867 remote_unpush_target (void)
4869 pop_all_targets_at_and_above (process_stratum
);
4873 remote_open_1 (const char *name
, int from_tty
,
4874 struct target_ops
*target
, int extended_p
)
4876 struct remote_state
*rs
= get_remote_state ();
4879 error (_("To open a remote debug connection, you need to specify what\n"
4880 "serial device is attached to the remote system\n"
4881 "(e.g. /dev/ttyS0, /dev/ttya, COM1, etc.)."));
4883 /* See FIXME above. */
4884 if (!target_async_permitted
)
4885 wait_forever_enabled_p
= 1;
4887 /* If we're connected to a running target, target_preopen will kill it.
4888 Ask this question first, before target_preopen has a chance to kill
4890 if (rs
->remote_desc
!= NULL
&& !have_inferiors ())
4893 && !query (_("Already connected to a remote target. Disconnect? ")))
4894 error (_("Still connected."));
4897 /* Here the possibly existing remote target gets unpushed. */
4898 target_preopen (from_tty
);
4900 /* Make sure we send the passed signals list the next time we resume. */
4901 xfree (rs
->last_pass_packet
);
4902 rs
->last_pass_packet
= NULL
;
4904 /* Make sure we send the program signals list the next time we
4906 xfree (rs
->last_program_signals_packet
);
4907 rs
->last_program_signals_packet
= NULL
;
4909 remote_fileio_reset ();
4910 reopen_exec_file ();
4913 rs
->remote_desc
= remote_serial_open (name
);
4914 if (!rs
->remote_desc
)
4915 perror_with_name (name
);
4917 if (baud_rate
!= -1)
4919 if (serial_setbaudrate (rs
->remote_desc
, baud_rate
))
4921 /* The requested speed could not be set. Error out to
4922 top level after closing remote_desc. Take care to
4923 set remote_desc to NULL to avoid closing remote_desc
4925 serial_close (rs
->remote_desc
);
4926 rs
->remote_desc
= NULL
;
4927 perror_with_name (name
);
4931 serial_setparity (rs
->remote_desc
, serial_parity
);
4932 serial_raw (rs
->remote_desc
);
4934 /* If there is something sitting in the buffer we might take it as a
4935 response to a command, which would be bad. */
4936 serial_flush_input (rs
->remote_desc
);
4940 puts_filtered ("Remote debugging using ");
4941 puts_filtered (name
);
4942 puts_filtered ("\n");
4944 push_target (target
); /* Switch to using remote target now. */
4946 /* Register extra event sources in the event loop. */
4947 remote_async_inferior_event_token
4948 = create_async_event_handler (remote_async_inferior_event_handler
,
4950 rs
->notif_state
= remote_notif_state_allocate ();
4952 /* Reset the target state; these things will be queried either by
4953 remote_query_supported or as they are needed. */
4954 reset_all_packet_configs_support ();
4955 rs
->cached_wait_status
= 0;
4956 rs
->explicit_packet_size
= 0;
4958 rs
->extended
= extended_p
;
4959 rs
->waiting_for_stop_reply
= 0;
4960 rs
->ctrlc_pending_p
= 0;
4962 rs
->general_thread
= not_sent_ptid
;
4963 rs
->continue_thread
= not_sent_ptid
;
4964 rs
->remote_traceframe_number
= -1;
4966 /* Probe for ability to use "ThreadInfo" query, as required. */
4967 rs
->use_threadinfo_query
= 1;
4968 rs
->use_threadextra_query
= 1;
4970 readahead_cache_invalidate ();
4972 if (target_async_permitted
)
4974 /* With this target we start out by owning the terminal. */
4975 remote_async_terminal_ours_p
= 1;
4977 /* FIXME: cagney/1999-09-23: During the initial connection it is
4978 assumed that the target is already ready and able to respond to
4979 requests. Unfortunately remote_start_remote() eventually calls
4980 wait_for_inferior() with no timeout. wait_forever_enabled_p gets
4981 around this. Eventually a mechanism that allows
4982 wait_for_inferior() to expect/get timeouts will be
4984 wait_forever_enabled_p
= 0;
4987 /* First delete any symbols previously loaded from shared libraries. */
4988 no_shared_libraries (NULL
, 0);
4991 init_thread_list ();
4993 /* Start the remote connection. If error() or QUIT, discard this
4994 target (we'd otherwise be in an inconsistent state) and then
4995 propogate the error on up the exception chain. This ensures that
4996 the caller doesn't stumble along blindly assuming that the
4997 function succeeded. The CLI doesn't have this problem but other
4998 UI's, such as MI do.
5000 FIXME: cagney/2002-05-19: Instead of re-throwing the exception,
5001 this function should return an error indication letting the
5002 caller restore the previous state. Unfortunately the command
5003 ``target remote'' is directly wired to this function making that
5004 impossible. On a positive note, the CLI side of this problem has
5005 been fixed - the function set_cmd_context() makes it possible for
5006 all the ``target ....'' commands to share a common callback
5007 function. See cli-dump.c. */
5012 remote_start_remote (from_tty
, target
, extended_p
);
5014 CATCH (ex
, RETURN_MASK_ALL
)
5016 /* Pop the partially set up target - unless something else did
5017 already before throwing the exception. */
5018 if (rs
->remote_desc
!= NULL
)
5019 remote_unpush_target ();
5020 if (target_async_permitted
)
5021 wait_forever_enabled_p
= 1;
5022 throw_exception (ex
);
5027 remote_btrace_reset ();
5029 if (target_async_permitted
)
5030 wait_forever_enabled_p
= 1;
5033 /* Detach the specified process. */
5036 remote_detach_pid (int pid
)
5038 struct remote_state
*rs
= get_remote_state ();
5040 if (remote_multi_process_p (rs
))
5041 xsnprintf (rs
->buf
, get_remote_packet_size (), "D;%x", pid
);
5043 strcpy (rs
->buf
, "D");
5046 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5048 if (rs
->buf
[0] == 'O' && rs
->buf
[1] == 'K')
5050 else if (rs
->buf
[0] == '\0')
5051 error (_("Remote doesn't know how to detach"));
5053 error (_("Can't detach process."));
5056 /* This detaches a program to which we previously attached, using
5057 inferior_ptid to identify the process. After this is done, GDB
5058 can be used to debug some other program. We better not have left
5059 any breakpoints in the target program or it'll die when it hits
5063 remote_detach_1 (const char *args
, int from_tty
)
5065 int pid
= ptid_get_pid (inferior_ptid
);
5066 struct remote_state
*rs
= get_remote_state ();
5067 struct thread_info
*tp
= find_thread_ptid (inferior_ptid
);
5071 error (_("Argument given to \"detach\" when remotely debugging."));
5073 if (!target_has_execution
)
5074 error (_("No process to detach from."));
5078 char *exec_file
= get_exec_file (0);
5079 if (exec_file
== NULL
)
5081 printf_unfiltered (_("Detaching from program: %s, %s\n"), exec_file
,
5082 target_pid_to_str (pid_to_ptid (pid
)));
5083 gdb_flush (gdb_stdout
);
5086 /* Tell the remote target to detach. */
5087 remote_detach_pid (pid
);
5089 /* Exit only if this is the only active inferior. */
5090 if (from_tty
&& !rs
->extended
&& number_of_live_inferiors () == 1)
5091 puts_filtered (_("Ending remote debugging.\n"));
5093 /* Check to see if we are detaching a fork parent. Note that if we
5094 are detaching a fork child, tp == NULL. */
5095 is_fork_parent
= (tp
!= NULL
5096 && tp
->pending_follow
.kind
== TARGET_WAITKIND_FORKED
);
5098 /* If doing detach-on-fork, we don't mourn, because that will delete
5099 breakpoints that should be available for the followed inferior. */
5100 if (!is_fork_parent
)
5101 target_mourn_inferior ();
5104 inferior_ptid
= null_ptid
;
5105 detach_inferior (pid
);
5110 remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5112 remote_detach_1 (args
, from_tty
);
5116 extended_remote_detach (struct target_ops
*ops
, const char *args
, int from_tty
)
5118 remote_detach_1 (args
, from_tty
);
5121 /* Target follow-fork function for remote targets. On entry, and
5122 at return, the current inferior is the fork parent.
5124 Note that although this is currently only used for extended-remote,
5125 it is named remote_follow_fork in anticipation of using it for the
5126 remote target as well. */
5129 remote_follow_fork (struct target_ops
*ops
, int follow_child
,
5132 struct remote_state
*rs
= get_remote_state ();
5133 enum target_waitkind kind
= inferior_thread ()->pending_follow
.kind
;
5135 if ((kind
== TARGET_WAITKIND_FORKED
&& remote_fork_event_p (rs
))
5136 || (kind
== TARGET_WAITKIND_VFORKED
&& remote_vfork_event_p (rs
)))
5138 /* When following the parent and detaching the child, we detach
5139 the child here. For the case of following the child and
5140 detaching the parent, the detach is done in the target-
5141 independent follow fork code in infrun.c. We can't use
5142 target_detach when detaching an unfollowed child because
5143 the client side doesn't know anything about the child. */
5144 if (detach_fork
&& !follow_child
)
5146 /* Detach the fork child. */
5150 child_ptid
= inferior_thread ()->pending_follow
.value
.related_pid
;
5151 child_pid
= ptid_get_pid (child_ptid
);
5153 remote_detach_pid (child_pid
);
5154 detach_inferior (child_pid
);
5160 /* Target follow-exec function for remote targets. Save EXECD_PATHNAME
5161 in the program space of the new inferior. On entry and at return the
5162 current inferior is the exec'ing inferior. INF is the new exec'd
5163 inferior, which may be the same as the exec'ing inferior unless
5164 follow-exec-mode is "new". */
5167 remote_follow_exec (struct target_ops
*ops
,
5168 struct inferior
*inf
, char *execd_pathname
)
5170 /* We know that this is a target file name, so if it has the "target:"
5171 prefix we strip it off before saving it in the program space. */
5172 if (is_target_filename (execd_pathname
))
5173 execd_pathname
+= strlen (TARGET_SYSROOT_PREFIX
);
5175 set_pspace_remote_exec_file (inf
->pspace
, execd_pathname
);
5178 /* Same as remote_detach, but don't send the "D" packet; just disconnect. */
5181 remote_disconnect (struct target_ops
*target
, const char *args
, int from_tty
)
5184 error (_("Argument given to \"disconnect\" when remotely debugging."));
5186 /* Make sure we unpush even the extended remote targets. Calling
5187 target_mourn_inferior won't unpush, and remote_mourn won't
5188 unpush if there is more than one inferior left. */
5189 unpush_target (target
);
5190 generic_mourn_inferior ();
5193 puts_filtered ("Ending remote debugging.\n");
5196 /* Attach to the process specified by ARGS. If FROM_TTY is non-zero,
5197 be chatty about it. */
5200 extended_remote_attach (struct target_ops
*target
, const char *args
,
5203 struct remote_state
*rs
= get_remote_state ();
5205 char *wait_status
= NULL
;
5207 pid
= parse_pid_to_attach (args
);
5209 /* Remote PID can be freely equal to getpid, do not check it here the same
5210 way as in other targets. */
5212 if (packet_support (PACKET_vAttach
) == PACKET_DISABLE
)
5213 error (_("This target does not support attaching to a process"));
5217 char *exec_file
= get_exec_file (0);
5220 printf_unfiltered (_("Attaching to program: %s, %s\n"), exec_file
,
5221 target_pid_to_str (pid_to_ptid (pid
)));
5223 printf_unfiltered (_("Attaching to %s\n"),
5224 target_pid_to_str (pid_to_ptid (pid
)));
5226 gdb_flush (gdb_stdout
);
5229 xsnprintf (rs
->buf
, get_remote_packet_size (), "vAttach;%x", pid
);
5231 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5233 switch (packet_ok (rs
->buf
,
5234 &remote_protocol_packets
[PACKET_vAttach
]))
5237 if (!target_is_non_stop_p ())
5239 /* Save the reply for later. */
5240 wait_status
= (char *) alloca (strlen (rs
->buf
) + 1);
5241 strcpy (wait_status
, rs
->buf
);
5243 else if (strcmp (rs
->buf
, "OK") != 0)
5244 error (_("Attaching to %s failed with: %s"),
5245 target_pid_to_str (pid_to_ptid (pid
)),
5248 case PACKET_UNKNOWN
:
5249 error (_("This target does not support attaching to a process"));
5251 error (_("Attaching to %s failed"),
5252 target_pid_to_str (pid_to_ptid (pid
)));
5255 set_current_inferior (remote_add_inferior (0, pid
, 1, 0));
5257 inferior_ptid
= pid_to_ptid (pid
);
5259 if (target_is_non_stop_p ())
5261 struct thread_info
*thread
;
5263 /* Get list of threads. */
5264 remote_update_thread_list (target
);
5266 thread
= first_thread_of_process (pid
);
5268 inferior_ptid
= thread
->ptid
;
5270 inferior_ptid
= pid_to_ptid (pid
);
5272 /* Invalidate our notion of the remote current thread. */
5273 record_currthread (rs
, minus_one_ptid
);
5277 /* Now, if we have thread information, update inferior_ptid. */
5278 inferior_ptid
= remote_current_thread (inferior_ptid
);
5280 /* Add the main thread to the thread list. */
5281 add_thread_silent (inferior_ptid
);
5284 /* Next, if the target can specify a description, read it. We do
5285 this before anything involving memory or registers. */
5286 target_find_description ();
5288 if (!target_is_non_stop_p ())
5290 /* Use the previously fetched status. */
5291 gdb_assert (wait_status
!= NULL
);
5293 if (target_can_async_p ())
5295 struct notif_event
*reply
5296 = remote_notif_parse (¬if_client_stop
, wait_status
);
5298 push_stop_reply ((struct stop_reply
*) reply
);
5304 gdb_assert (wait_status
!= NULL
);
5305 strcpy (rs
->buf
, wait_status
);
5306 rs
->cached_wait_status
= 1;
5310 gdb_assert (wait_status
== NULL
);
5313 /* Implementation of the to_post_attach method. */
5316 extended_remote_post_attach (struct target_ops
*ops
, int pid
)
5318 /* Get text, data & bss offsets. */
5321 /* In certain cases GDB might not have had the chance to start
5322 symbol lookup up until now. This could happen if the debugged
5323 binary is not using shared libraries, the vsyscall page is not
5324 present (on Linux) and the binary itself hadn't changed since the
5325 debugging process was started. */
5326 if (symfile_objfile
!= NULL
)
5327 remote_check_symbols();
5331 /* Check for the availability of vCont. This function should also check
5335 remote_vcont_probe (struct remote_state
*rs
)
5339 strcpy (rs
->buf
, "vCont?");
5341 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5344 /* Make sure that the features we assume are supported. */
5345 if (startswith (buf
, "vCont"))
5348 int support_c
, support_C
;
5350 rs
->supports_vCont
.s
= 0;
5351 rs
->supports_vCont
.S
= 0;
5354 rs
->supports_vCont
.t
= 0;
5355 rs
->supports_vCont
.r
= 0;
5356 while (p
&& *p
== ';')
5359 if (*p
== 's' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5360 rs
->supports_vCont
.s
= 1;
5361 else if (*p
== 'S' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5362 rs
->supports_vCont
.S
= 1;
5363 else if (*p
== 'c' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5365 else if (*p
== 'C' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5367 else if (*p
== 't' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5368 rs
->supports_vCont
.t
= 1;
5369 else if (*p
== 'r' && (*(p
+ 1) == ';' || *(p
+ 1) == 0))
5370 rs
->supports_vCont
.r
= 1;
5372 p
= strchr (p
, ';');
5375 /* If c, and C are not all supported, we can't use vCont. Clearing
5376 BUF will make packet_ok disable the packet. */
5377 if (!support_c
|| !support_C
)
5381 packet_ok (buf
, &remote_protocol_packets
[PACKET_vCont
]);
5384 /* Helper function for building "vCont" resumptions. Write a
5385 resumption to P. ENDP points to one-passed-the-end of the buffer
5386 we're allowed to write to. Returns BUF+CHARACTERS_WRITTEN. The
5387 thread to be resumed is PTID; STEP and SIGGNAL indicate whether the
5388 resumed thread should be single-stepped and/or signalled. If PTID
5389 equals minus_one_ptid, then all threads are resumed; if PTID
5390 represents a process, then all threads of the process are resumed;
5391 the thread to be stepped and/or signalled is given in the global
5395 append_resumption (char *p
, char *endp
,
5396 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5398 struct remote_state
*rs
= get_remote_state ();
5400 if (step
&& siggnal
!= GDB_SIGNAL_0
)
5401 p
+= xsnprintf (p
, endp
- p
, ";S%02x", siggnal
);
5403 /* GDB is willing to range step. */
5404 && use_range_stepping
5405 /* Target supports range stepping. */
5406 && rs
->supports_vCont
.r
5407 /* We don't currently support range stepping multiple
5408 threads with a wildcard (though the protocol allows it,
5409 so stubs shouldn't make an active effort to forbid
5411 && !(remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5413 struct thread_info
*tp
;
5415 if (ptid_equal (ptid
, minus_one_ptid
))
5417 /* If we don't know about the target thread's tid, then
5418 we're resuming magic_null_ptid (see caller). */
5419 tp
= find_thread_ptid (magic_null_ptid
);
5422 tp
= find_thread_ptid (ptid
);
5423 gdb_assert (tp
!= NULL
);
5425 if (tp
->control
.may_range_step
)
5427 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
5429 p
+= xsnprintf (p
, endp
- p
, ";r%s,%s",
5430 phex_nz (tp
->control
.step_range_start
,
5432 phex_nz (tp
->control
.step_range_end
,
5436 p
+= xsnprintf (p
, endp
- p
, ";s");
5439 p
+= xsnprintf (p
, endp
- p
, ";s");
5440 else if (siggnal
!= GDB_SIGNAL_0
)
5441 p
+= xsnprintf (p
, endp
- p
, ";C%02x", siggnal
);
5443 p
+= xsnprintf (p
, endp
- p
, ";c");
5445 if (remote_multi_process_p (rs
) && ptid_is_pid (ptid
))
5449 /* All (-1) threads of process. */
5450 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5452 p
+= xsnprintf (p
, endp
- p
, ":");
5453 p
= write_ptid (p
, endp
, nptid
);
5455 else if (!ptid_equal (ptid
, minus_one_ptid
))
5457 p
+= xsnprintf (p
, endp
- p
, ":");
5458 p
= write_ptid (p
, endp
, ptid
);
5464 /* Clear the thread's private info on resume. */
5467 resume_clear_thread_private_info (struct thread_info
*thread
)
5469 if (thread
->priv
!= NULL
)
5471 thread
->priv
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
5472 thread
->priv
->watch_data_address
= 0;
5476 /* Append a vCont continue-with-signal action for threads that have a
5477 non-zero stop signal. */
5480 append_pending_thread_resumptions (char *p
, char *endp
, ptid_t ptid
)
5482 struct thread_info
*thread
;
5484 ALL_NON_EXITED_THREADS (thread
)
5485 if (ptid_match (thread
->ptid
, ptid
)
5486 && !ptid_equal (inferior_ptid
, thread
->ptid
)
5487 && thread
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
5489 p
= append_resumption (p
, endp
, thread
->ptid
,
5490 0, thread
->suspend
.stop_signal
);
5491 thread
->suspend
.stop_signal
= GDB_SIGNAL_0
;
5492 resume_clear_thread_private_info (thread
);
5498 /* Resume the remote inferior by using a "vCont" packet. The thread
5499 to be resumed is PTID; STEP and SIGGNAL indicate whether the
5500 resumed thread should be single-stepped and/or signalled. If PTID
5501 equals minus_one_ptid, then all threads are resumed; the thread to
5502 be stepped and/or signalled is given in the global INFERIOR_PTID.
5503 This function returns non-zero iff it resumes the inferior.
5505 This function issues a strict subset of all possible vCont commands at the
5509 remote_vcont_resume (ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5511 struct remote_state
*rs
= get_remote_state ();
5515 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5516 remote_vcont_probe (rs
);
5518 if (packet_support (PACKET_vCont
) == PACKET_DISABLE
)
5522 endp
= rs
->buf
+ get_remote_packet_size ();
5524 /* If we could generate a wider range of packets, we'd have to worry
5525 about overflowing BUF. Should there be a generic
5526 "multi-part-packet" packet? */
5528 p
+= xsnprintf (p
, endp
- p
, "vCont");
5530 if (ptid_equal (ptid
, magic_null_ptid
))
5532 /* MAGIC_NULL_PTID means that we don't have any active threads,
5533 so we don't have any TID numbers the inferior will
5534 understand. Make sure to only send forms that do not specify
5536 append_resumption (p
, endp
, minus_one_ptid
, step
, siggnal
);
5538 else if (ptid_equal (ptid
, minus_one_ptid
) || ptid_is_pid (ptid
))
5540 /* Resume all threads (of all processes, or of a single
5541 process), with preference for INFERIOR_PTID. This assumes
5542 inferior_ptid belongs to the set of all threads we are about
5544 if (step
|| siggnal
!= GDB_SIGNAL_0
)
5546 /* Step inferior_ptid, with or without signal. */
5547 p
= append_resumption (p
, endp
, inferior_ptid
, step
, siggnal
);
5550 /* Also pass down any pending signaled resumption for other
5551 threads not the current. */
5552 p
= append_pending_thread_resumptions (p
, endp
, ptid
);
5554 /* And continue others without a signal. */
5555 append_resumption (p
, endp
, ptid
, /*step=*/ 0, GDB_SIGNAL_0
);
5559 /* Scheduler locking; resume only PTID. */
5560 append_resumption (p
, endp
, ptid
, step
, siggnal
);
5563 gdb_assert (strlen (rs
->buf
) < get_remote_packet_size ());
5566 if (target_is_non_stop_p ())
5568 /* In non-stop, the stub replies to vCont with "OK". The stop
5569 reply will be reported asynchronously by means of a `%Stop'
5571 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5572 if (strcmp (rs
->buf
, "OK") != 0)
5573 error (_("Unexpected vCont reply in non-stop mode: %s"), rs
->buf
);
5579 /* Tell the remote machine to resume. */
5582 remote_resume (struct target_ops
*ops
,
5583 ptid_t ptid
, int step
, enum gdb_signal siggnal
)
5585 struct remote_state
*rs
= get_remote_state ();
5587 struct thread_info
*thread
;
5589 /* In all-stop, we can't mark REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN
5590 (explained in remote-notif.c:handle_notification) so
5591 remote_notif_process is not called. We need find a place where
5592 it is safe to start a 'vNotif' sequence. It is good to do it
5593 before resuming inferior, because inferior was stopped and no RSP
5594 traffic at that moment. */
5595 if (!target_is_non_stop_p ())
5596 remote_notif_process (rs
->notif_state
, ¬if_client_stop
);
5598 rs
->last_sent_signal
= siggnal
;
5599 rs
->last_sent_step
= step
;
5601 /* The vCont packet doesn't need to specify threads via Hc. */
5602 /* No reverse support (yet) for vCont. */
5603 if (execution_direction
!= EXEC_REVERSE
)
5604 if (remote_vcont_resume (ptid
, step
, siggnal
))
5607 /* All other supported resume packets do use Hc, so set the continue
5609 if (ptid_equal (ptid
, minus_one_ptid
))
5610 set_continue_thread (any_thread_ptid
);
5612 set_continue_thread (ptid
);
5614 ALL_NON_EXITED_THREADS (thread
)
5615 resume_clear_thread_private_info (thread
);
5618 if (execution_direction
== EXEC_REVERSE
)
5620 /* We don't pass signals to the target in reverse exec mode. */
5621 if (info_verbose
&& siggnal
!= GDB_SIGNAL_0
)
5622 warning (_(" - Can't pass signal %d to target in reverse: ignored."),
5625 if (step
&& packet_support (PACKET_bs
) == PACKET_DISABLE
)
5626 error (_("Remote reverse-step not supported."));
5627 if (!step
&& packet_support (PACKET_bc
) == PACKET_DISABLE
)
5628 error (_("Remote reverse-continue not supported."));
5630 strcpy (buf
, step
? "bs" : "bc");
5632 else if (siggnal
!= GDB_SIGNAL_0
)
5634 buf
[0] = step
? 'S' : 'C';
5635 buf
[1] = tohex (((int) siggnal
>> 4) & 0xf);
5636 buf
[2] = tohex (((int) siggnal
) & 0xf);
5640 strcpy (buf
, step
? "s" : "c");
5645 /* We are about to start executing the inferior, let's register it
5646 with the event loop. NOTE: this is the one place where all the
5647 execution commands end up. We could alternatively do this in each
5648 of the execution commands in infcmd.c. */
5649 /* FIXME: ezannoni 1999-09-28: We may need to move this out of here
5650 into infcmd.c in order to allow inferior function calls to work
5651 NOT asynchronously. */
5652 if (target_can_async_p ())
5655 /* We've just told the target to resume. The remote server will
5656 wait for the inferior to stop, and then send a stop reply. In
5657 the mean time, we can't start another command/query ourselves
5658 because the stub wouldn't be ready to process it. This applies
5659 only to the base all-stop protocol, however. In non-stop (which
5660 only supports vCont), the stub replies with an "OK", and is
5661 immediate able to process further serial input. */
5662 if (!target_is_non_stop_p ())
5663 rs
->waiting_for_stop_reply
= 1;
5667 /* Set up the signal handler for SIGINT, while the target is
5668 executing, ovewriting the 'regular' SIGINT signal handler. */
5670 async_initialize_sigint_signal_handler (void)
5672 signal (SIGINT
, async_handle_remote_sigint
);
5675 /* Signal handler for SIGINT, while the target is executing. */
5677 async_handle_remote_sigint (int sig
)
5679 signal (sig
, async_handle_remote_sigint_twice
);
5680 /* Note we need to go through gdb_call_async_signal_handler in order
5681 to wake up the event loop on Windows. */
5682 gdb_call_async_signal_handler (async_sigint_remote_token
, 0);
5685 /* Signal handler for SIGINT, installed after SIGINT has already been
5686 sent once. It will take effect the second time that the user sends
5689 async_handle_remote_sigint_twice (int sig
)
5691 signal (sig
, async_handle_remote_sigint
);
5692 /* See note in async_handle_remote_sigint. */
5693 gdb_call_async_signal_handler (async_sigint_remote_twice_token
, 0);
5696 /* Implementation of to_check_pending_interrupt. */
5699 remote_check_pending_interrupt (struct target_ops
*self
)
5701 struct async_signal_handler
*token
= async_sigint_remote_twice_token
;
5703 if (async_signal_handler_is_marked (token
))
5705 clear_async_signal_handler (token
);
5706 call_async_signal_handler (token
);
5710 /* Perform the real interruption of the target execution, in response
5713 async_remote_interrupt (gdb_client_data arg
)
5716 fprintf_unfiltered (gdb_stdlog
, "async_remote_interrupt called\n");
5718 target_interrupt (inferior_ptid
);
5721 /* Perform interrupt, if the first attempt did not succeed. Just give
5722 up on the target alltogether. */
5724 async_remote_interrupt_twice (gdb_client_data arg
)
5727 fprintf_unfiltered (gdb_stdlog
, "async_remote_interrupt_twice called\n");
5732 /* Reinstall the usual SIGINT handlers, after the target has
5735 async_cleanup_sigint_signal_handler (void *dummy
)
5737 signal (SIGINT
, handle_sigint
);
5740 /* Send ^C to target to halt it. Target will respond, and send us a
5742 static void (*ofunc
) (int);
5744 /* The command line interface's interrupt routine. This function is installed
5745 as a signal handler for SIGINT. The first time a user requests an
5746 interrupt, we call remote_interrupt to send a break or ^C. If there is no
5747 response from the target (it didn't stop when the user requested it),
5748 we ask the user if he'd like to detach from the target. */
5751 sync_remote_interrupt (int signo
)
5753 /* If this doesn't work, try more severe steps. */
5754 signal (signo
, sync_remote_interrupt_twice
);
5756 gdb_call_async_signal_handler (async_sigint_remote_token
, 1);
5759 /* The user typed ^C twice. */
5762 sync_remote_interrupt_twice (int signo
)
5764 signal (signo
, ofunc
);
5765 gdb_call_async_signal_handler (async_sigint_remote_twice_token
, 1);
5766 signal (signo
, sync_remote_interrupt
);
5769 /* Non-stop version of target_stop. Uses `vCont;t' to stop a remote
5770 thread, all threads of a remote process, or all threads of all
5774 remote_stop_ns (ptid_t ptid
)
5776 struct remote_state
*rs
= get_remote_state ();
5778 char *endp
= rs
->buf
+ get_remote_packet_size ();
5780 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
5781 remote_vcont_probe (rs
);
5783 if (!rs
->supports_vCont
.t
)
5784 error (_("Remote server does not support stopping threads"));
5786 if (ptid_equal (ptid
, minus_one_ptid
)
5787 || (!remote_multi_process_p (rs
) && ptid_is_pid (ptid
)))
5788 p
+= xsnprintf (p
, endp
- p
, "vCont;t");
5793 p
+= xsnprintf (p
, endp
- p
, "vCont;t:");
5795 if (ptid_is_pid (ptid
))
5796 /* All (-1) threads of process. */
5797 nptid
= ptid_build (ptid_get_pid (ptid
), -1, 0);
5800 /* Small optimization: if we already have a stop reply for
5801 this thread, no use in telling the stub we want this
5803 if (peek_stop_reply (ptid
))
5809 write_ptid (p
, endp
, nptid
);
5812 /* In non-stop, we get an immediate OK reply. The stop reply will
5813 come in asynchronously by notification. */
5815 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5816 if (strcmp (rs
->buf
, "OK") != 0)
5817 error (_("Stopping %s failed: %s"), target_pid_to_str (ptid
), rs
->buf
);
5820 /* All-stop version of target_interrupt. Sends a break or a ^C to
5821 interrupt the remote target. It is undefined which thread of which
5822 process reports the interrupt. */
5825 remote_interrupt_as (void)
5827 struct remote_state
*rs
= get_remote_state ();
5829 rs
->ctrlc_pending_p
= 1;
5831 /* If the inferior is stopped already, but the core didn't know
5832 about it yet, just ignore the request. The cached wait status
5833 will be collected in remote_wait. */
5834 if (rs
->cached_wait_status
)
5837 /* Send interrupt_sequence to remote target. */
5838 send_interrupt_sequence ();
5841 /* Non-stop version of target_interrupt. Uses `vCtrlC' to interrupt
5842 the remote target. It is undefined which thread of which process
5843 reports the interrupt. Returns true if the packet is supported by
5844 the server, false otherwise. */
5847 remote_interrupt_ns (void)
5849 struct remote_state
*rs
= get_remote_state ();
5851 char *endp
= rs
->buf
+ get_remote_packet_size ();
5853 xsnprintf (p
, endp
- p
, "vCtrlC");
5855 /* In non-stop, we get an immediate OK reply. The stop reply will
5856 come in asynchronously by notification. */
5858 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
5860 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vCtrlC
]))
5864 case PACKET_UNKNOWN
:
5867 error (_("Interrupting target failed: %s"), rs
->buf
);
5873 /* Implement the to_stop function for the remote targets. */
5876 remote_stop (struct target_ops
*self
, ptid_t ptid
)
5879 fprintf_unfiltered (gdb_stdlog
, "remote_stop called\n");
5881 if (target_is_non_stop_p ())
5882 remote_stop_ns (ptid
);
5885 /* We don't currently have a way to transparently pause the
5886 remote target in all-stop mode. Interrupt it instead. */
5887 remote_interrupt_as ();
5891 /* Implement the to_interrupt function for the remote targets. */
5894 remote_interrupt (struct target_ops
*self
, ptid_t ptid
)
5897 fprintf_unfiltered (gdb_stdlog
, "remote_interrupt called\n");
5901 /* In non-stop mode, we always stop with no signal instead. */
5902 remote_stop_ns (ptid
);
5906 /* In all-stop, we emulate ^C-ing the remote target's
5908 if (target_is_non_stop_p ())
5910 if (!remote_interrupt_ns ())
5912 /* No support for ^C-ing the remote target. Stop it
5913 (with no signal) instead. */
5914 remote_stop_ns (ptid
);
5918 remote_interrupt_as ();
5922 /* Ask the user what to do when an interrupt is received. */
5925 interrupt_query (void)
5927 struct remote_state
*rs
= get_remote_state ();
5928 struct cleanup
*old_chain
;
5930 old_chain
= make_cleanup_restore_target_terminal ();
5931 target_terminal_ours ();
5933 if (rs
->waiting_for_stop_reply
&& rs
->ctrlc_pending_p
)
5935 if (query (_("The target is not responding to interrupt requests.\n"
5936 "Stop debugging it? ")))
5938 remote_unpush_target ();
5939 throw_error (TARGET_CLOSE_ERROR
, _("Disconnected from target."));
5944 if (query (_("Interrupted while waiting for the program.\n"
5945 "Give up waiting? ")))
5949 do_cleanups (old_chain
);
5952 /* Enable/disable target terminal ownership. Most targets can use
5953 terminal groups to control terminal ownership. Remote targets are
5954 different in that explicit transfer of ownership to/from GDB/target
5958 remote_terminal_inferior (struct target_ops
*self
)
5960 if (!target_async_permitted
)
5961 /* Nothing to do. */
5964 /* FIXME: cagney/1999-09-27: Make calls to target_terminal_*()
5965 idempotent. The event-loop GDB talking to an asynchronous target
5966 with a synchronous command calls this function from both
5967 event-top.c and infrun.c/infcmd.c. Once GDB stops trying to
5968 transfer the terminal to the target when it shouldn't this guard
5970 if (!remote_async_terminal_ours_p
)
5972 delete_file_handler (input_fd
);
5973 remote_async_terminal_ours_p
= 0;
5974 async_initialize_sigint_signal_handler ();
5975 /* NOTE: At this point we could also register our selves as the
5976 recipient of all input. Any characters typed could then be
5977 passed on down to the target. */
5981 remote_terminal_ours (struct target_ops
*self
)
5983 if (!target_async_permitted
)
5984 /* Nothing to do. */
5987 /* See FIXME in remote_terminal_inferior. */
5988 if (remote_async_terminal_ours_p
)
5990 async_cleanup_sigint_signal_handler (NULL
);
5991 add_file_handler (input_fd
, stdin_event_handler
, 0);
5992 remote_async_terminal_ours_p
= 1;
5996 remote_console_output (char *msg
)
6000 for (p
= msg
; p
[0] && p
[1]; p
+= 2)
6003 char c
= fromhex (p
[0]) * 16 + fromhex (p
[1]);
6007 fputs_unfiltered (tb
, gdb_stdtarg
);
6009 gdb_flush (gdb_stdtarg
);
6012 typedef struct cached_reg
6015 gdb_byte data
[MAX_REGISTER_SIZE
];
6018 DEF_VEC_O(cached_reg_t
);
6020 typedef struct stop_reply
6022 struct notif_event base
;
6024 /* The identifier of the thread about this event */
6027 /* The remote state this event is associated with. When the remote
6028 connection, represented by a remote_state object, is closed,
6029 all the associated stop_reply events should be released. */
6030 struct remote_state
*rs
;
6032 struct target_waitstatus ws
;
6034 /* Expedited registers. This makes remote debugging a bit more
6035 efficient for those targets that provide critical registers as
6036 part of their normal status mechanism (as another roundtrip to
6037 fetch them is avoided). */
6038 VEC(cached_reg_t
) *regcache
;
6040 enum target_stop_reason stop_reason
;
6042 CORE_ADDR watch_data_address
;
6047 DECLARE_QUEUE_P (stop_reply_p
);
6048 DEFINE_QUEUE_P (stop_reply_p
);
6049 /* The list of already fetched and acknowledged stop events. This
6050 queue is used for notification Stop, and other notifications
6051 don't need queue for their events, because the notification events
6052 of Stop can't be consumed immediately, so that events should be
6053 queued first, and be consumed by remote_wait_{ns,as} one per
6054 time. Other notifications can consume their events immediately,
6055 so queue is not needed for them. */
6056 static QUEUE (stop_reply_p
) *stop_reply_queue
;
6059 stop_reply_xfree (struct stop_reply
*r
)
6061 notif_event_xfree ((struct notif_event
*) r
);
6064 /* Return the length of the stop reply queue. */
6067 stop_reply_queue_length (void)
6069 return QUEUE_length (stop_reply_p
, stop_reply_queue
);
6073 remote_notif_stop_parse (struct notif_client
*self
, char *buf
,
6074 struct notif_event
*event
)
6076 remote_parse_stop_reply (buf
, (struct stop_reply
*) event
);
6080 remote_notif_stop_ack (struct notif_client
*self
, char *buf
,
6081 struct notif_event
*event
)
6083 struct stop_reply
*stop_reply
= (struct stop_reply
*) event
;
6086 putpkt ((char *) self
->ack_command
);
6088 if (stop_reply
->ws
.kind
== TARGET_WAITKIND_IGNORE
)
6089 /* We got an unknown stop reply. */
6090 error (_("Unknown stop reply"));
6092 push_stop_reply (stop_reply
);
6096 remote_notif_stop_can_get_pending_events (struct notif_client
*self
)
6098 /* We can't get pending events in remote_notif_process for
6099 notification stop, and we have to do this in remote_wait_ns
6100 instead. If we fetch all queued events from stub, remote stub
6101 may exit and we have no chance to process them back in
6103 mark_async_event_handler (remote_async_inferior_event_token
);
6108 stop_reply_dtr (struct notif_event
*event
)
6110 struct stop_reply
*r
= (struct stop_reply
*) event
;
6112 VEC_free (cached_reg_t
, r
->regcache
);
6115 static struct notif_event
*
6116 remote_notif_stop_alloc_reply (void)
6118 /* We cast to a pointer to the "base class". */
6119 struct notif_event
*r
= (struct notif_event
*) XNEW (struct stop_reply
);
6121 r
->dtr
= stop_reply_dtr
;
6126 /* A client of notification Stop. */
6128 struct notif_client notif_client_stop
=
6132 remote_notif_stop_parse
,
6133 remote_notif_stop_ack
,
6134 remote_notif_stop_can_get_pending_events
,
6135 remote_notif_stop_alloc_reply
,
6139 /* A parameter to pass data in and out. */
6141 struct queue_iter_param
6144 struct stop_reply
*output
;
6147 /* Determine if THREAD is a pending fork parent thread. ARG contains
6148 the pid of the process that owns the threads we want to check, or
6149 -1 if we want to check all threads. */
6152 is_pending_fork_parent (struct target_waitstatus
*ws
, int event_pid
,
6155 if (ws
->kind
== TARGET_WAITKIND_FORKED
6156 || ws
->kind
== TARGET_WAITKIND_VFORKED
)
6158 if (event_pid
== -1 || event_pid
== ptid_get_pid (thread_ptid
))
6165 /* Check whether EVENT is a fork event, and if it is, remove the
6166 fork child from the context list passed in DATA. */
6169 remove_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
6170 QUEUE_ITER (stop_reply_p
) *iter
,
6174 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6175 struct threads_listing_context
*context
6176 = (struct threads_listing_context
*) param
->input
;
6178 if (event
->ws
.kind
== TARGET_WAITKIND_FORKED
6179 || event
->ws
.kind
== TARGET_WAITKIND_VFORKED
6180 || event
->ws
.kind
== TARGET_WAITKIND_THREAD_EXITED
)
6181 threads_listing_context_remove (&event
->ws
, context
);
6186 /* If CONTEXT contains any fork child threads that have not been
6187 reported yet, remove them from the CONTEXT list. If such a
6188 thread exists it is because we are stopped at a fork catchpoint
6189 and have not yet called follow_fork, which will set up the
6190 host-side data structures for the new process. */
6193 remove_new_fork_children (struct threads_listing_context
*context
)
6195 struct thread_info
* thread
;
6197 struct notif_client
*notif
= ¬if_client_stop
;
6198 struct queue_iter_param param
;
6200 /* For any threads stopped at a fork event, remove the corresponding
6201 fork child threads from the CONTEXT list. */
6202 ALL_NON_EXITED_THREADS (thread
)
6204 struct target_waitstatus
*ws
;
6206 if (thread
->suspend
.waitstatus_pending_p
)
6207 ws
= &thread
->suspend
.waitstatus
;
6209 ws
= &thread
->pending_follow
;
6211 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
6213 threads_listing_context_remove (ws
, context
);
6217 /* Check for any pending fork events (not reported or processed yet)
6218 in process PID and remove those fork child threads from the
6219 CONTEXT list as well. */
6220 remote_notif_get_pending_events (notif
);
6221 param
.input
= context
;
6222 param
.output
= NULL
;
6223 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6224 remove_child_of_pending_fork
, ¶m
);
6227 /* Remove stop replies in the queue if its pid is equal to the given
6231 remove_stop_reply_for_inferior (QUEUE (stop_reply_p
) *q
,
6232 QUEUE_ITER (stop_reply_p
) *iter
,
6236 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6237 struct inferior
*inf
= (struct inferior
*) param
->input
;
6239 if (ptid_get_pid (event
->ptid
) == inf
->pid
)
6241 stop_reply_xfree (event
);
6242 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6248 /* Discard all pending stop replies of inferior INF. */
6251 discard_pending_stop_replies (struct inferior
*inf
)
6253 struct queue_iter_param param
;
6254 struct stop_reply
*reply
;
6255 struct remote_state
*rs
= get_remote_state ();
6256 struct remote_notif_state
*rns
= rs
->notif_state
;
6258 /* This function can be notified when an inferior exists. When the
6259 target is not remote, the notification state is NULL. */
6260 if (rs
->remote_desc
== NULL
)
6263 reply
= (struct stop_reply
*) rns
->pending_event
[notif_client_stop
.id
];
6265 /* Discard the in-flight notification. */
6266 if (reply
!= NULL
&& ptid_get_pid (reply
->ptid
) == inf
->pid
)
6268 stop_reply_xfree (reply
);
6269 rns
->pending_event
[notif_client_stop
.id
] = NULL
;
6273 param
.output
= NULL
;
6274 /* Discard the stop replies we have already pulled with
6276 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6277 remove_stop_reply_for_inferior
, ¶m
);
6280 /* If its remote state is equal to the given remote state,
6281 remove EVENT from the stop reply queue. */
6284 remove_stop_reply_of_remote_state (QUEUE (stop_reply_p
) *q
,
6285 QUEUE_ITER (stop_reply_p
) *iter
,
6289 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6290 struct remote_state
*rs
= (struct remote_state
*) param
->input
;
6292 if (event
->rs
== rs
)
6294 stop_reply_xfree (event
);
6295 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6301 /* Discard the stop replies for RS in stop_reply_queue. */
6304 discard_pending_stop_replies_in_queue (struct remote_state
*rs
)
6306 struct queue_iter_param param
;
6309 param
.output
= NULL
;
6310 /* Discard the stop replies we have already pulled with
6312 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6313 remove_stop_reply_of_remote_state
, ¶m
);
6316 /* A parameter to pass data in and out. */
6319 remote_notif_remove_once_on_match (QUEUE (stop_reply_p
) *q
,
6320 QUEUE_ITER (stop_reply_p
) *iter
,
6324 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
6325 ptid_t
*ptid
= (ptid_t
*) param
->input
;
6327 if (ptid_match (event
->ptid
, *ptid
))
6329 param
->output
= event
;
6330 QUEUE_remove_elem (stop_reply_p
, q
, iter
);
6337 /* Remove the first reply in 'stop_reply_queue' which matches
6340 static struct stop_reply
*
6341 remote_notif_remove_queued_reply (ptid_t ptid
)
6343 struct queue_iter_param param
;
6345 param
.input
= &ptid
;
6346 param
.output
= NULL
;
6348 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6349 remote_notif_remove_once_on_match
, ¶m
);
6351 fprintf_unfiltered (gdb_stdlog
,
6352 "notif: discard queued event: 'Stop' in %s\n",
6353 target_pid_to_str (ptid
));
6355 return param
.output
;
6358 /* Look for a queued stop reply belonging to PTID. If one is found,
6359 remove it from the queue, and return it. Returns NULL if none is
6360 found. If there are still queued events left to process, tell the
6361 event loop to get back to target_wait soon. */
6363 static struct stop_reply
*
6364 queued_stop_reply (ptid_t ptid
)
6366 struct stop_reply
*r
= remote_notif_remove_queued_reply (ptid
);
6368 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
6369 /* There's still at least an event left. */
6370 mark_async_event_handler (remote_async_inferior_event_token
);
6375 /* Push a fully parsed stop reply in the stop reply queue. Since we
6376 know that we now have at least one queued event left to pass to the
6377 core side, tell the event loop to get back to target_wait soon. */
6380 push_stop_reply (struct stop_reply
*new_event
)
6382 QUEUE_enque (stop_reply_p
, stop_reply_queue
, new_event
);
6385 fprintf_unfiltered (gdb_stdlog
,
6386 "notif: push 'Stop' %s to queue %d\n",
6387 target_pid_to_str (new_event
->ptid
),
6388 QUEUE_length (stop_reply_p
,
6391 mark_async_event_handler (remote_async_inferior_event_token
);
6395 stop_reply_match_ptid_and_ws (QUEUE (stop_reply_p
) *q
,
6396 QUEUE_ITER (stop_reply_p
) *iter
,
6397 struct stop_reply
*event
,
6400 ptid_t
*ptid
= (ptid_t
*) data
;
6402 return !(ptid_equal (*ptid
, event
->ptid
)
6403 && event
->ws
.kind
== TARGET_WAITKIND_STOPPED
);
6406 /* Returns true if we have a stop reply for PTID. */
6409 peek_stop_reply (ptid_t ptid
)
6411 return !QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
6412 stop_reply_match_ptid_and_ws
, &ptid
);
6415 /* Helper for remote_parse_stop_reply. Return nonzero if the substring
6416 starting with P and ending with PEND matches PREFIX. */
6419 strprefix (const char *p
, const char *pend
, const char *prefix
)
6421 for ( ; p
< pend
; p
++, prefix
++)
6424 return *prefix
== '\0';
6427 /* Parse the stop reply in BUF. Either the function succeeds, and the
6428 result is stored in EVENT, or throws an error. */
6431 remote_parse_stop_reply (char *buf
, struct stop_reply
*event
)
6433 struct remote_arch_state
*rsa
= get_remote_arch_state ();
6438 event
->ptid
= null_ptid
;
6439 event
->rs
= get_remote_state ();
6440 event
->ws
.kind
= TARGET_WAITKIND_IGNORE
;
6441 event
->ws
.value
.integer
= 0;
6442 event
->stop_reason
= TARGET_STOPPED_BY_NO_REASON
;
6443 event
->regcache
= NULL
;
6448 case 'T': /* Status with PC, SP, FP, ... */
6449 /* Expedited reply, containing Signal, {regno, reg} repeat. */
6450 /* format is: 'Tssn...:r...;n...:r...;n...:r...;#cc', where
6452 n... = register number
6453 r... = register contents
6456 p
= &buf
[3]; /* after Txx */
6462 p1
= strchr (p
, ':');
6464 error (_("Malformed packet(a) (missing colon): %s\n\
6468 error (_("Malformed packet(a) (missing register number): %s\n\
6472 /* Some "registers" are actually extended stop information.
6473 Note if you're adding a new entry here: GDB 7.9 and
6474 earlier assume that all register "numbers" that start
6475 with an hex digit are real register numbers. Make sure
6476 the server only sends such a packet if it knows the
6477 client understands it. */
6479 if (strprefix (p
, p1
, "thread"))
6480 event
->ptid
= read_ptid (++p1
, &p
);
6481 else if (strprefix (p
, p1
, "syscall_entry"))
6485 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_ENTRY
;
6486 p
= unpack_varlen_hex (++p1
, &sysno
);
6487 event
->ws
.value
.syscall_number
= (int) sysno
;
6489 else if (strprefix (p
, p1
, "syscall_return"))
6493 event
->ws
.kind
= TARGET_WAITKIND_SYSCALL_RETURN
;
6494 p
= unpack_varlen_hex (++p1
, &sysno
);
6495 event
->ws
.value
.syscall_number
= (int) sysno
;
6497 else if (strprefix (p
, p1
, "watch")
6498 || strprefix (p
, p1
, "rwatch")
6499 || strprefix (p
, p1
, "awatch"))
6501 event
->stop_reason
= TARGET_STOPPED_BY_WATCHPOINT
;
6502 p
= unpack_varlen_hex (++p1
, &addr
);
6503 event
->watch_data_address
= (CORE_ADDR
) addr
;
6505 else if (strprefix (p
, p1
, "swbreak"))
6507 event
->stop_reason
= TARGET_STOPPED_BY_SW_BREAKPOINT
;
6509 /* Make sure the stub doesn't forget to indicate support
6511 if (packet_support (PACKET_swbreak_feature
) != PACKET_ENABLE
)
6512 error (_("Unexpected swbreak stop reason"));
6514 /* The value part is documented as "must be empty",
6515 though we ignore it, in case we ever decide to make
6516 use of it in a backward compatible way. */
6517 p
= strchrnul (p1
+ 1, ';');
6519 else if (strprefix (p
, p1
, "hwbreak"))
6521 event
->stop_reason
= TARGET_STOPPED_BY_HW_BREAKPOINT
;
6523 /* Make sure the stub doesn't forget to indicate support
6525 if (packet_support (PACKET_hwbreak_feature
) != PACKET_ENABLE
)
6526 error (_("Unexpected hwbreak stop reason"));
6529 p
= strchrnul (p1
+ 1, ';');
6531 else if (strprefix (p
, p1
, "library"))
6533 event
->ws
.kind
= TARGET_WAITKIND_LOADED
;
6534 p
= strchrnul (p1
+ 1, ';');
6536 else if (strprefix (p
, p1
, "replaylog"))
6538 event
->ws
.kind
= TARGET_WAITKIND_NO_HISTORY
;
6539 /* p1 will indicate "begin" or "end", but it makes
6540 no difference for now, so ignore it. */
6541 p
= strchrnul (p1
+ 1, ';');
6543 else if (strprefix (p
, p1
, "core"))
6547 p
= unpack_varlen_hex (++p1
, &c
);
6550 else if (strprefix (p
, p1
, "fork"))
6552 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6553 event
->ws
.kind
= TARGET_WAITKIND_FORKED
;
6555 else if (strprefix (p
, p1
, "vfork"))
6557 event
->ws
.value
.related_pid
= read_ptid (++p1
, &p
);
6558 event
->ws
.kind
= TARGET_WAITKIND_VFORKED
;
6560 else if (strprefix (p
, p1
, "vforkdone"))
6562 event
->ws
.kind
= TARGET_WAITKIND_VFORK_DONE
;
6563 p
= strchrnul (p1
+ 1, ';');
6565 else if (strprefix (p
, p1
, "exec"))
6568 char pathname
[PATH_MAX
];
6571 /* Determine the length of the execd pathname. */
6572 p
= unpack_varlen_hex (++p1
, &ignored
);
6573 pathlen
= (p
- p1
) / 2;
6575 /* Save the pathname for event reporting and for
6576 the next run command. */
6577 hex2bin (p1
, (gdb_byte
*) pathname
, pathlen
);
6578 pathname
[pathlen
] = '\0';
6580 /* This is freed during event handling. */
6581 event
->ws
.value
.execd_pathname
= xstrdup (pathname
);
6582 event
->ws
.kind
= TARGET_WAITKIND_EXECD
;
6584 /* Skip the registers included in this packet, since
6585 they may be for an architecture different from the
6586 one used by the original program. */
6589 else if (strprefix (p
, p1
, "create"))
6591 event
->ws
.kind
= TARGET_WAITKIND_THREAD_CREATED
;
6592 p
= strchrnul (p1
+ 1, ';');
6601 p
= strchrnul (p1
+ 1, ';');
6606 /* Maybe a real ``P'' register number. */
6607 p_temp
= unpack_varlen_hex (p
, &pnum
);
6608 /* If the first invalid character is the colon, we got a
6609 register number. Otherwise, it's an unknown stop
6613 struct packet_reg
*reg
= packet_reg_from_pnum (rsa
, pnum
);
6614 cached_reg_t cached_reg
;
6617 error (_("Remote sent bad register number %s: %s\n\
6619 hex_string (pnum
), p
, buf
);
6621 cached_reg
.num
= reg
->regnum
;
6624 fieldsize
= hex2bin (p
, cached_reg
.data
,
6625 register_size (target_gdbarch (),
6628 if (fieldsize
< register_size (target_gdbarch (),
6630 warning (_("Remote reply is too short: %s"), buf
);
6632 VEC_safe_push (cached_reg_t
, event
->regcache
, &cached_reg
);
6636 /* Not a number. Silently skip unknown optional
6638 p
= strchrnul (p1
+ 1, ';');
6643 error (_("Remote register badly formatted: %s\nhere: %s"),
6648 if (event
->ws
.kind
!= TARGET_WAITKIND_IGNORE
)
6652 case 'S': /* Old style status, just signal only. */
6656 event
->ws
.kind
= TARGET_WAITKIND_STOPPED
;
6657 sig
= (fromhex (buf
[1]) << 4) + fromhex (buf
[2]);
6658 if (GDB_SIGNAL_FIRST
<= sig
&& sig
< GDB_SIGNAL_LAST
)
6659 event
->ws
.value
.sig
= (enum gdb_signal
) sig
;
6661 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
6664 case 'w': /* Thread exited. */
6669 event
->ws
.kind
= TARGET_WAITKIND_THREAD_EXITED
;
6670 p
= unpack_varlen_hex (&buf
[1], &value
);
6671 event
->ws
.value
.integer
= value
;
6673 error (_("stop reply packet badly formatted: %s"), buf
);
6674 event
->ptid
= read_ptid (++p
, NULL
);
6677 case 'W': /* Target exited. */
6684 /* GDB used to accept only 2 hex chars here. Stubs should
6685 only send more if they detect GDB supports multi-process
6687 p
= unpack_varlen_hex (&buf
[1], &value
);
6691 /* The remote process exited. */
6692 event
->ws
.kind
= TARGET_WAITKIND_EXITED
;
6693 event
->ws
.value
.integer
= value
;
6697 /* The remote process exited with a signal. */
6698 event
->ws
.kind
= TARGET_WAITKIND_SIGNALLED
;
6699 if (GDB_SIGNAL_FIRST
<= value
&& value
< GDB_SIGNAL_LAST
)
6700 event
->ws
.value
.sig
= (enum gdb_signal
) value
;
6702 event
->ws
.value
.sig
= GDB_SIGNAL_UNKNOWN
;
6705 /* If no process is specified, assume inferior_ptid. */
6706 pid
= ptid_get_pid (inferior_ptid
);
6715 else if (startswith (p
, "process:"))
6719 p
+= sizeof ("process:") - 1;
6720 unpack_varlen_hex (p
, &upid
);
6724 error (_("unknown stop reply packet: %s"), buf
);
6727 error (_("unknown stop reply packet: %s"), buf
);
6728 event
->ptid
= pid_to_ptid (pid
);
6732 event
->ws
.kind
= TARGET_WAITKIND_NO_RESUMED
;
6733 event
->ptid
= minus_one_ptid
;
6737 if (target_is_non_stop_p () && ptid_equal (event
->ptid
, null_ptid
))
6738 error (_("No process or thread specified in stop reply: %s"), buf
);
6741 /* When the stub wants to tell GDB about a new notification reply, it
6742 sends a notification (%Stop, for example). Those can come it at
6743 any time, hence, we have to make sure that any pending
6744 putpkt/getpkt sequence we're making is finished, before querying
6745 the stub for more events with the corresponding ack command
6746 (vStopped, for example). E.g., if we started a vStopped sequence
6747 immediately upon receiving the notification, something like this
6755 1.6) <-- (registers reply to step #1.3)
6757 Obviously, the reply in step #1.6 would be unexpected to a vStopped
6760 To solve this, whenever we parse a %Stop notification successfully,
6761 we mark the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN, and carry on
6762 doing whatever we were doing:
6768 <GDB marks the REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN>
6769 2.5) <-- (registers reply to step #2.3)
6771 Eventualy after step #2.5, we return to the event loop, which
6772 notices there's an event on the
6773 REMOTE_ASYNC_GET_PENDING_EVENTS_TOKEN event and calls the
6774 associated callback --- the function below. At this point, we're
6775 always safe to start a vStopped sequence. :
6778 2.7) <-- T05 thread:2
6784 remote_notif_get_pending_events (struct notif_client
*nc
)
6786 struct remote_state
*rs
= get_remote_state ();
6788 if (rs
->notif_state
->pending_event
[nc
->id
] != NULL
)
6791 fprintf_unfiltered (gdb_stdlog
,
6792 "notif: process: '%s' ack pending event\n",
6796 nc
->ack (nc
, rs
->buf
, rs
->notif_state
->pending_event
[nc
->id
]);
6797 rs
->notif_state
->pending_event
[nc
->id
] = NULL
;
6801 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
6802 if (strcmp (rs
->buf
, "OK") == 0)
6805 remote_notif_ack (nc
, rs
->buf
);
6811 fprintf_unfiltered (gdb_stdlog
,
6812 "notif: process: '%s' no pending reply\n",
6817 /* Called when it is decided that STOP_REPLY holds the info of the
6818 event that is to be returned to the core. This function always
6819 destroys STOP_REPLY. */
6822 process_stop_reply (struct stop_reply
*stop_reply
,
6823 struct target_waitstatus
*status
)
6827 *status
= stop_reply
->ws
;
6828 ptid
= stop_reply
->ptid
;
6830 /* If no thread/process was reported by the stub, assume the current
6832 if (ptid_equal (ptid
, null_ptid
))
6833 ptid
= inferior_ptid
;
6835 if (status
->kind
!= TARGET_WAITKIND_EXITED
6836 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
6837 && status
->kind
!= TARGET_WAITKIND_NO_RESUMED
)
6839 struct private_thread_info
*remote_thr
;
6841 /* Expedited registers. */
6842 if (stop_reply
->regcache
)
6844 struct regcache
*regcache
6845 = get_thread_arch_regcache (ptid
, target_gdbarch ());
6850 VEC_iterate(cached_reg_t
, stop_reply
->regcache
, ix
, reg
);
6852 regcache_raw_supply (regcache
, reg
->num
, reg
->data
);
6853 VEC_free (cached_reg_t
, stop_reply
->regcache
);
6856 remote_notice_new_inferior (ptid
, 0);
6857 remote_thr
= demand_private_info (ptid
);
6858 remote_thr
->core
= stop_reply
->core
;
6859 remote_thr
->stop_reason
= stop_reply
->stop_reason
;
6860 remote_thr
->watch_data_address
= stop_reply
->watch_data_address
;
6863 stop_reply_xfree (stop_reply
);
6867 /* The non-stop mode version of target_wait. */
6870 remote_wait_ns (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
6872 struct remote_state
*rs
= get_remote_state ();
6873 struct stop_reply
*stop_reply
;
6877 /* If in non-stop mode, get out of getpkt even if a
6878 notification is received. */
6880 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
6881 0 /* forever */, &is_notif
);
6884 if (ret
!= -1 && !is_notif
)
6887 case 'E': /* Error of some sort. */
6888 /* We're out of sync with the target now. Did it continue
6889 or not? We can't tell which thread it was in non-stop,
6890 so just ignore this. */
6891 warning (_("Remote failure reply: %s"), rs
->buf
);
6893 case 'O': /* Console output. */
6894 remote_console_output (rs
->buf
+ 1);
6897 warning (_("Invalid remote reply: %s"), rs
->buf
);
6901 /* Acknowledge a pending stop reply that may have arrived in the
6903 if (rs
->notif_state
->pending_event
[notif_client_stop
.id
] != NULL
)
6904 remote_notif_get_pending_events (¬if_client_stop
);
6906 /* If indeed we noticed a stop reply, we're done. */
6907 stop_reply
= queued_stop_reply (ptid
);
6908 if (stop_reply
!= NULL
)
6909 return process_stop_reply (stop_reply
, status
);
6911 /* Still no event. If we're just polling for an event, then
6912 return to the event loop. */
6913 if (options
& TARGET_WNOHANG
)
6915 status
->kind
= TARGET_WAITKIND_IGNORE
;
6916 return minus_one_ptid
;
6919 /* Otherwise do a blocking wait. */
6920 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
6921 1 /* forever */, &is_notif
);
6925 /* Wait until the remote machine stops, then return, storing status in
6926 STATUS just as `wait' would. */
6929 remote_wait_as (ptid_t ptid
, struct target_waitstatus
*status
, int options
)
6931 struct remote_state
*rs
= get_remote_state ();
6932 ptid_t event_ptid
= null_ptid
;
6934 struct stop_reply
*stop_reply
;
6938 status
->kind
= TARGET_WAITKIND_IGNORE
;
6939 status
->value
.integer
= 0;
6941 stop_reply
= queued_stop_reply (ptid
);
6942 if (stop_reply
!= NULL
)
6943 return process_stop_reply (stop_reply
, status
);
6945 if (rs
->cached_wait_status
)
6946 /* Use the cached wait status, but only once. */
6947 rs
->cached_wait_status
= 0;
6952 int forever
= ((options
& TARGET_WNOHANG
) == 0
6953 && wait_forever_enabled_p
);
6955 if (!rs
->waiting_for_stop_reply
)
6957 status
->kind
= TARGET_WAITKIND_NO_RESUMED
;
6958 return minus_one_ptid
;
6961 if (!target_is_async_p ())
6963 ofunc
= signal (SIGINT
, sync_remote_interrupt
);
6964 /* If the user hit C-c before this packet, or between packets,
6965 pretend that it was hit right here. */
6966 if (check_quit_flag ())
6969 sync_remote_interrupt (SIGINT
);
6973 /* FIXME: cagney/1999-09-27: If we're in async mode we should
6974 _never_ wait for ever -> test on target_is_async_p().
6975 However, before we do that we need to ensure that the caller
6976 knows how to take the target into/out of async mode. */
6977 ret
= getpkt_or_notif_sane (&rs
->buf
, &rs
->buf_size
,
6978 forever
, &is_notif
);
6980 if (!target_is_async_p ())
6981 signal (SIGINT
, ofunc
);
6983 /* GDB gets a notification. Return to core as this event is
6985 if (ret
!= -1 && is_notif
)
6986 return minus_one_ptid
;
6988 if (ret
== -1 && (options
& TARGET_WNOHANG
) != 0)
6989 return minus_one_ptid
;
6994 /* Assume that the target has acknowledged Ctrl-C unless we receive
6995 an 'F' or 'O' packet. */
6996 if (buf
[0] != 'F' && buf
[0] != 'O')
6997 rs
->ctrlc_pending_p
= 0;
7001 case 'E': /* Error of some sort. */
7002 /* We're out of sync with the target now. Did it continue or
7003 not? Not is more likely, so report a stop. */
7004 rs
->waiting_for_stop_reply
= 0;
7006 warning (_("Remote failure reply: %s"), buf
);
7007 status
->kind
= TARGET_WAITKIND_STOPPED
;
7008 status
->value
.sig
= GDB_SIGNAL_0
;
7010 case 'F': /* File-I/O request. */
7011 /* GDB may access the inferior memory while handling the File-I/O
7012 request, but we don't want GDB accessing memory while waiting
7013 for a stop reply. See the comments in putpkt_binary. Set
7014 waiting_for_stop_reply to 0 temporarily. */
7015 rs
->waiting_for_stop_reply
= 0;
7016 remote_fileio_request (buf
, rs
->ctrlc_pending_p
);
7017 rs
->ctrlc_pending_p
= 0;
7018 /* GDB handled the File-I/O request, and the target is running
7019 again. Keep waiting for events. */
7020 rs
->waiting_for_stop_reply
= 1;
7022 case 'N': case 'T': case 'S': case 'X': case 'W':
7024 struct stop_reply
*stop_reply
;
7026 /* There is a stop reply to handle. */
7027 rs
->waiting_for_stop_reply
= 0;
7030 = (struct stop_reply
*) remote_notif_parse (¬if_client_stop
,
7033 event_ptid
= process_stop_reply (stop_reply
, status
);
7036 case 'O': /* Console output. */
7037 remote_console_output (buf
+ 1);
7040 if (rs
->last_sent_signal
!= GDB_SIGNAL_0
)
7042 /* Zero length reply means that we tried 'S' or 'C' and the
7043 remote system doesn't support it. */
7044 target_terminal_ours_for_output ();
7046 ("Can't send signals to this remote system. %s not sent.\n",
7047 gdb_signal_to_name (rs
->last_sent_signal
));
7048 rs
->last_sent_signal
= GDB_SIGNAL_0
;
7049 target_terminal_inferior ();
7051 strcpy ((char *) buf
, rs
->last_sent_step
? "s" : "c");
7052 putpkt ((char *) buf
);
7055 /* else fallthrough */
7057 warning (_("Invalid remote reply: %s"), buf
);
7061 if (status
->kind
== TARGET_WAITKIND_NO_RESUMED
)
7062 return minus_one_ptid
;
7063 else if (status
->kind
== TARGET_WAITKIND_IGNORE
)
7065 /* Nothing interesting happened. If we're doing a non-blocking
7066 poll, we're done. Otherwise, go back to waiting. */
7067 if (options
& TARGET_WNOHANG
)
7068 return minus_one_ptid
;
7072 else if (status
->kind
!= TARGET_WAITKIND_EXITED
7073 && status
->kind
!= TARGET_WAITKIND_SIGNALLED
)
7075 if (!ptid_equal (event_ptid
, null_ptid
))
7076 record_currthread (rs
, event_ptid
);
7078 event_ptid
= inferior_ptid
;
7081 /* A process exit. Invalidate our notion of current thread. */
7082 record_currthread (rs
, minus_one_ptid
);
7087 /* Wait until the remote machine stops, then return, storing status in
7088 STATUS just as `wait' would. */
7091 remote_wait (struct target_ops
*ops
,
7092 ptid_t ptid
, struct target_waitstatus
*status
, int options
)
7096 if (target_is_non_stop_p ())
7097 event_ptid
= remote_wait_ns (ptid
, status
, options
);
7099 event_ptid
= remote_wait_as (ptid
, status
, options
);
7101 if (target_is_async_p ())
7103 /* If there are are events left in the queue tell the event loop
7105 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
7106 mark_async_event_handler (remote_async_inferior_event_token
);
7112 /* Fetch a single register using a 'p' packet. */
7115 fetch_register_using_p (struct regcache
*regcache
, struct packet_reg
*reg
)
7117 struct remote_state
*rs
= get_remote_state ();
7119 char regp
[MAX_REGISTER_SIZE
];
7122 if (packet_support (PACKET_p
) == PACKET_DISABLE
)
7125 if (reg
->pnum
== -1)
7130 p
+= hexnumstr (p
, reg
->pnum
);
7133 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7137 switch (packet_ok (buf
, &remote_protocol_packets
[PACKET_p
]))
7141 case PACKET_UNKNOWN
:
7144 error (_("Could not fetch register \"%s\"; remote failure reply '%s'"),
7145 gdbarch_register_name (get_regcache_arch (regcache
),
7150 /* If this register is unfetchable, tell the regcache. */
7153 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7157 /* Otherwise, parse and supply the value. */
7163 error (_("fetch_register_using_p: early buf termination"));
7165 regp
[i
++] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7168 regcache_raw_supply (regcache
, reg
->regnum
, regp
);
7172 /* Fetch the registers included in the target's 'g' packet. */
7175 send_g_packet (void)
7177 struct remote_state
*rs
= get_remote_state ();
7180 xsnprintf (rs
->buf
, get_remote_packet_size (), "g");
7181 remote_send (&rs
->buf
, &rs
->buf_size
);
7183 /* We can get out of synch in various cases. If the first character
7184 in the buffer is not a hex character, assume that has happened
7185 and try to fetch another packet to read. */
7186 while ((rs
->buf
[0] < '0' || rs
->buf
[0] > '9')
7187 && (rs
->buf
[0] < 'A' || rs
->buf
[0] > 'F')
7188 && (rs
->buf
[0] < 'a' || rs
->buf
[0] > 'f')
7189 && rs
->buf
[0] != 'x') /* New: unavailable register value. */
7192 fprintf_unfiltered (gdb_stdlog
,
7193 "Bad register packet; fetching a new packet\n");
7194 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7197 buf_len
= strlen (rs
->buf
);
7199 /* Sanity check the received packet. */
7200 if (buf_len
% 2 != 0)
7201 error (_("Remote 'g' packet reply is of odd length: %s"), rs
->buf
);
7207 process_g_packet (struct regcache
*regcache
)
7209 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
7210 struct remote_state
*rs
= get_remote_state ();
7211 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7216 buf_len
= strlen (rs
->buf
);
7218 /* Further sanity checks, with knowledge of the architecture. */
7219 if (buf_len
> 2 * rsa
->sizeof_g_packet
)
7220 error (_("Remote 'g' packet reply is too long: %s"), rs
->buf
);
7222 /* Save the size of the packet sent to us by the target. It is used
7223 as a heuristic when determining the max size of packets that the
7224 target can safely receive. */
7225 if (rsa
->actual_register_packet_size
== 0)
7226 rsa
->actual_register_packet_size
= buf_len
;
7228 /* If this is smaller than we guessed the 'g' packet would be,
7229 update our records. A 'g' reply that doesn't include a register's
7230 value implies either that the register is not available, or that
7231 the 'p' packet must be used. */
7232 if (buf_len
< 2 * rsa
->sizeof_g_packet
)
7234 rsa
->sizeof_g_packet
= buf_len
/ 2;
7236 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7238 if (rsa
->regs
[i
].pnum
== -1)
7241 if (rsa
->regs
[i
].offset
>= rsa
->sizeof_g_packet
)
7242 rsa
->regs
[i
].in_g_packet
= 0;
7244 rsa
->regs
[i
].in_g_packet
= 1;
7248 regs
= (char *) alloca (rsa
->sizeof_g_packet
);
7250 /* Unimplemented registers read as all bits zero. */
7251 memset (regs
, 0, rsa
->sizeof_g_packet
);
7253 /* Reply describes registers byte by byte, each byte encoded as two
7254 hex characters. Suck them all up, then supply them to the
7255 register cacheing/storage mechanism. */
7258 for (i
= 0; i
< rsa
->sizeof_g_packet
; i
++)
7260 if (p
[0] == 0 || p
[1] == 0)
7261 /* This shouldn't happen - we adjusted sizeof_g_packet above. */
7262 internal_error (__FILE__
, __LINE__
,
7263 _("unexpected end of 'g' packet reply"));
7265 if (p
[0] == 'x' && p
[1] == 'x')
7266 regs
[i
] = 0; /* 'x' */
7268 regs
[i
] = fromhex (p
[0]) * 16 + fromhex (p
[1]);
7272 for (i
= 0; i
< gdbarch_num_regs (gdbarch
); i
++)
7274 struct packet_reg
*r
= &rsa
->regs
[i
];
7278 if (r
->offset
* 2 >= strlen (rs
->buf
))
7279 /* This shouldn't happen - we adjusted in_g_packet above. */
7280 internal_error (__FILE__
, __LINE__
,
7281 _("unexpected end of 'g' packet reply"));
7282 else if (rs
->buf
[r
->offset
* 2] == 'x')
7284 gdb_assert (r
->offset
* 2 < strlen (rs
->buf
));
7285 /* The register isn't available, mark it as such (at
7286 the same time setting the value to zero). */
7287 regcache_raw_supply (regcache
, r
->regnum
, NULL
);
7290 regcache_raw_supply (regcache
, r
->regnum
,
7297 fetch_registers_using_g (struct regcache
*regcache
)
7300 process_g_packet (regcache
);
7303 /* Make the remote selected traceframe match GDB's selected
7307 set_remote_traceframe (void)
7310 struct remote_state
*rs
= get_remote_state ();
7312 if (rs
->remote_traceframe_number
== get_traceframe_number ())
7315 /* Avoid recursion, remote_trace_find calls us again. */
7316 rs
->remote_traceframe_number
= get_traceframe_number ();
7318 newnum
= target_trace_find (tfind_number
,
7319 get_traceframe_number (), 0, 0, NULL
);
7321 /* Should not happen. If it does, all bets are off. */
7322 if (newnum
!= get_traceframe_number ())
7323 warning (_("could not set remote traceframe"));
7327 remote_fetch_registers (struct target_ops
*ops
,
7328 struct regcache
*regcache
, int regnum
)
7330 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7333 set_remote_traceframe ();
7334 set_general_thread (inferior_ptid
);
7338 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
7340 gdb_assert (reg
!= NULL
);
7342 /* If this register might be in the 'g' packet, try that first -
7343 we are likely to read more than one register. If this is the
7344 first 'g' packet, we might be overly optimistic about its
7345 contents, so fall back to 'p'. */
7346 if (reg
->in_g_packet
)
7348 fetch_registers_using_g (regcache
);
7349 if (reg
->in_g_packet
)
7353 if (fetch_register_using_p (regcache
, reg
))
7356 /* This register is not available. */
7357 regcache_raw_supply (regcache
, reg
->regnum
, NULL
);
7362 fetch_registers_using_g (regcache
);
7364 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7365 if (!rsa
->regs
[i
].in_g_packet
)
7366 if (!fetch_register_using_p (regcache
, &rsa
->regs
[i
]))
7368 /* This register is not available. */
7369 regcache_raw_supply (regcache
, i
, NULL
);
7373 /* Prepare to store registers. Since we may send them all (using a
7374 'G' request), we have to read out the ones we don't want to change
7378 remote_prepare_to_store (struct target_ops
*self
, struct regcache
*regcache
)
7380 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7382 gdb_byte buf
[MAX_REGISTER_SIZE
];
7384 /* Make sure the entire registers array is valid. */
7385 switch (packet_support (PACKET_P
))
7387 case PACKET_DISABLE
:
7388 case PACKET_SUPPORT_UNKNOWN
:
7389 /* Make sure all the necessary registers are cached. */
7390 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7391 if (rsa
->regs
[i
].in_g_packet
)
7392 regcache_raw_read (regcache
, rsa
->regs
[i
].regnum
, buf
);
7399 /* Helper: Attempt to store REGNUM using the P packet. Return fail IFF
7400 packet was not recognized. */
7403 store_register_using_P (const struct regcache
*regcache
,
7404 struct packet_reg
*reg
)
7406 struct gdbarch
*gdbarch
= get_regcache_arch (regcache
);
7407 struct remote_state
*rs
= get_remote_state ();
7408 /* Try storing a single register. */
7409 char *buf
= rs
->buf
;
7410 gdb_byte regp
[MAX_REGISTER_SIZE
];
7413 if (packet_support (PACKET_P
) == PACKET_DISABLE
)
7416 if (reg
->pnum
== -1)
7419 xsnprintf (buf
, get_remote_packet_size (), "P%s=", phex_nz (reg
->pnum
, 0));
7420 p
= buf
+ strlen (buf
);
7421 regcache_raw_collect (regcache
, reg
->regnum
, regp
);
7422 bin2hex (regp
, p
, register_size (gdbarch
, reg
->regnum
));
7424 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7426 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_P
]))
7431 error (_("Could not write register \"%s\"; remote failure reply '%s'"),
7432 gdbarch_register_name (gdbarch
, reg
->regnum
), rs
->buf
);
7433 case PACKET_UNKNOWN
:
7436 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
7440 /* Store register REGNUM, or all registers if REGNUM == -1, from the
7441 contents of the register cache buffer. FIXME: ignores errors. */
7444 store_registers_using_G (const struct regcache
*regcache
)
7446 struct remote_state
*rs
= get_remote_state ();
7447 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7451 /* Extract all the registers in the regcache copying them into a
7456 regs
= (gdb_byte
*) alloca (rsa
->sizeof_g_packet
);
7457 memset (regs
, 0, rsa
->sizeof_g_packet
);
7458 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7460 struct packet_reg
*r
= &rsa
->regs
[i
];
7463 regcache_raw_collect (regcache
, r
->regnum
, regs
+ r
->offset
);
7467 /* Command describes registers byte by byte,
7468 each byte encoded as two hex characters. */
7471 /* remote_prepare_to_store insures that rsa->sizeof_g_packet gets
7473 bin2hex (regs
, p
, rsa
->sizeof_g_packet
);
7475 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7476 if (packet_check_result (rs
->buf
) == PACKET_ERROR
)
7477 error (_("Could not write registers; remote failure reply '%s'"),
7481 /* Store register REGNUM, or all registers if REGNUM == -1, from the contents
7482 of the register cache buffer. FIXME: ignores errors. */
7485 remote_store_registers (struct target_ops
*ops
,
7486 struct regcache
*regcache
, int regnum
)
7488 struct remote_arch_state
*rsa
= get_remote_arch_state ();
7491 set_remote_traceframe ();
7492 set_general_thread (inferior_ptid
);
7496 struct packet_reg
*reg
= packet_reg_from_regnum (rsa
, regnum
);
7498 gdb_assert (reg
!= NULL
);
7500 /* Always prefer to store registers using the 'P' packet if
7501 possible; we often change only a small number of registers.
7502 Sometimes we change a larger number; we'd need help from a
7503 higher layer to know to use 'G'. */
7504 if (store_register_using_P (regcache
, reg
))
7507 /* For now, don't complain if we have no way to write the
7508 register. GDB loses track of unavailable registers too
7509 easily. Some day, this may be an error. We don't have
7510 any way to read the register, either... */
7511 if (!reg
->in_g_packet
)
7514 store_registers_using_G (regcache
);
7518 store_registers_using_G (regcache
);
7520 for (i
= 0; i
< gdbarch_num_regs (get_regcache_arch (regcache
)); i
++)
7521 if (!rsa
->regs
[i
].in_g_packet
)
7522 if (!store_register_using_P (regcache
, &rsa
->regs
[i
]))
7523 /* See above for why we do not issue an error here. */
7528 /* Return the number of hex digits in num. */
7531 hexnumlen (ULONGEST num
)
7535 for (i
= 0; num
!= 0; i
++)
7541 /* Set BUF to the minimum number of hex digits representing NUM. */
7544 hexnumstr (char *buf
, ULONGEST num
)
7546 int len
= hexnumlen (num
);
7548 return hexnumnstr (buf
, num
, len
);
7552 /* Set BUF to the hex digits representing NUM, padded to WIDTH characters. */
7555 hexnumnstr (char *buf
, ULONGEST num
, int width
)
7561 for (i
= width
- 1; i
>= 0; i
--)
7563 buf
[i
] = "0123456789abcdef"[(num
& 0xf)];
7570 /* Mask all but the least significant REMOTE_ADDRESS_SIZE bits. */
7573 remote_address_masked (CORE_ADDR addr
)
7575 unsigned int address_size
= remote_address_size
;
7577 /* If "remoteaddresssize" was not set, default to target address size. */
7579 address_size
= gdbarch_addr_bit (target_gdbarch ());
7581 if (address_size
> 0
7582 && address_size
< (sizeof (ULONGEST
) * 8))
7584 /* Only create a mask when that mask can safely be constructed
7585 in a ULONGEST variable. */
7588 mask
= (mask
<< address_size
) - 1;
7594 /* Determine whether the remote target supports binary downloading.
7595 This is accomplished by sending a no-op memory write of zero length
7596 to the target at the specified address. It does not suffice to send
7597 the whole packet, since many stubs strip the eighth bit and
7598 subsequently compute a wrong checksum, which causes real havoc with
7601 NOTE: This can still lose if the serial line is not eight-bit
7602 clean. In cases like this, the user should clear "remote
7606 check_binary_download (CORE_ADDR addr
)
7608 struct remote_state
*rs
= get_remote_state ();
7610 switch (packet_support (PACKET_X
))
7612 case PACKET_DISABLE
:
7616 case PACKET_SUPPORT_UNKNOWN
:
7622 p
+= hexnumstr (p
, (ULONGEST
) addr
);
7624 p
+= hexnumstr (p
, (ULONGEST
) 0);
7628 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7629 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7631 if (rs
->buf
[0] == '\0')
7634 fprintf_unfiltered (gdb_stdlog
,
7635 "binary downloading NOT "
7636 "supported by target\n");
7637 remote_protocol_packets
[PACKET_X
].support
= PACKET_DISABLE
;
7642 fprintf_unfiltered (gdb_stdlog
,
7643 "binary downloading supported by target\n");
7644 remote_protocol_packets
[PACKET_X
].support
= PACKET_ENABLE
;
7651 /* Helper function to resize the payload in order to try to get a good
7652 alignment. We try to write an amount of data such that the next write will
7653 start on an address aligned on REMOTE_ALIGN_WRITES. */
7656 align_for_efficient_write (int todo
, CORE_ADDR memaddr
)
7658 return ((memaddr
+ todo
) & ~(REMOTE_ALIGN_WRITES
- 1)) - memaddr
;
7661 /* Write memory data directly to the remote machine.
7662 This does not inform the data cache; the data cache uses this.
7663 HEADER is the starting part of the packet.
7664 MEMADDR is the address in the remote memory space.
7665 MYADDR is the address of the buffer in our space.
7666 LEN_UNITS is the number of addressable units to write.
7667 UNIT_SIZE is the length in bytes of an addressable unit.
7668 PACKET_FORMAT should be either 'X' or 'M', and indicates if we
7669 should send data as binary ('X'), or hex-encoded ('M').
7671 The function creates packet of the form
7672 <HEADER><ADDRESS>,<LENGTH>:<DATA>
7674 where encoding of <DATA> is terminated by PACKET_FORMAT.
7676 If USE_LENGTH is 0, then the <LENGTH> field and the preceding comma
7679 Return the transferred status, error or OK (an
7680 'enum target_xfer_status' value). Save the number of addressable units
7681 transferred in *XFERED_LEN_UNITS. Only transfer a single packet.
7683 On a platform with an addressable memory size of 2 bytes (UNIT_SIZE == 2), an
7684 exchange between gdb and the stub could look like (?? in place of the
7690 -> $M1000,3:eeeeffffeeee#??
7694 <- eeeeffffeeeedddd */
7696 static enum target_xfer_status
7697 remote_write_bytes_aux (const char *header
, CORE_ADDR memaddr
,
7698 const gdb_byte
*myaddr
, ULONGEST len_units
,
7699 int unit_size
, ULONGEST
*xfered_len_units
,
7700 char packet_format
, int use_length
)
7702 struct remote_state
*rs
= get_remote_state ();
7708 int payload_capacity_bytes
;
7709 int payload_length_bytes
;
7711 if (packet_format
!= 'X' && packet_format
!= 'M')
7712 internal_error (__FILE__
, __LINE__
,
7713 _("remote_write_bytes_aux: bad packet format"));
7716 return TARGET_XFER_EOF
;
7718 payload_capacity_bytes
= get_memory_write_packet_size ();
7720 /* The packet buffer will be large enough for the payload;
7721 get_memory_packet_size ensures this. */
7724 /* Compute the size of the actual payload by subtracting out the
7725 packet header and footer overhead: "$M<memaddr>,<len>:...#nn". */
7727 payload_capacity_bytes
-= strlen ("$,:#NN");
7729 /* The comma won't be used. */
7730 payload_capacity_bytes
+= 1;
7731 payload_capacity_bytes
-= strlen (header
);
7732 payload_capacity_bytes
-= hexnumlen (memaddr
);
7734 /* Construct the packet excluding the data: "<header><memaddr>,<len>:". */
7736 strcat (rs
->buf
, header
);
7737 p
= rs
->buf
+ strlen (header
);
7739 /* Compute a best guess of the number of bytes actually transfered. */
7740 if (packet_format
== 'X')
7742 /* Best guess at number of bytes that will fit. */
7743 todo_units
= min (len_units
, payload_capacity_bytes
/ unit_size
);
7745 payload_capacity_bytes
-= hexnumlen (todo_units
);
7746 todo_units
= min (todo_units
, payload_capacity_bytes
/ unit_size
);
7750 /* Number of bytes that will fit. */
7751 todo_units
= min (len_units
, (payload_capacity_bytes
/ unit_size
) / 2);
7753 payload_capacity_bytes
-= hexnumlen (todo_units
);
7754 todo_units
= min (todo_units
, (payload_capacity_bytes
/ unit_size
) / 2);
7757 if (todo_units
<= 0)
7758 internal_error (__FILE__
, __LINE__
,
7759 _("minimum packet size too small to write data"));
7761 /* If we already need another packet, then try to align the end
7762 of this packet to a useful boundary. */
7763 if (todo_units
> 2 * REMOTE_ALIGN_WRITES
&& todo_units
< len_units
)
7764 todo_units
= align_for_efficient_write (todo_units
, memaddr
);
7766 /* Append "<memaddr>". */
7767 memaddr
= remote_address_masked (memaddr
);
7768 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
7775 /* Append the length and retain its location and size. It may need to be
7776 adjusted once the packet body has been created. */
7778 plenlen
= hexnumstr (p
, (ULONGEST
) todo_units
);
7786 /* Append the packet body. */
7787 if (packet_format
== 'X')
7789 /* Binary mode. Send target system values byte by byte, in
7790 increasing byte addresses. Only escape certain critical
7792 payload_length_bytes
=
7793 remote_escape_output (myaddr
, todo_units
, unit_size
, (gdb_byte
*) p
,
7794 &units_written
, payload_capacity_bytes
);
7796 /* If not all TODO units fit, then we'll need another packet. Make
7797 a second try to keep the end of the packet aligned. Don't do
7798 this if the packet is tiny. */
7799 if (units_written
< todo_units
&& units_written
> 2 * REMOTE_ALIGN_WRITES
)
7803 new_todo_units
= align_for_efficient_write (units_written
, memaddr
);
7805 if (new_todo_units
!= units_written
)
7806 payload_length_bytes
=
7807 remote_escape_output (myaddr
, new_todo_units
, unit_size
,
7808 (gdb_byte
*) p
, &units_written
,
7809 payload_capacity_bytes
);
7812 p
+= payload_length_bytes
;
7813 if (use_length
&& units_written
< todo_units
)
7815 /* Escape chars have filled up the buffer prematurely,
7816 and we have actually sent fewer units than planned.
7817 Fix-up the length field of the packet. Use the same
7818 number of characters as before. */
7819 plen
+= hexnumnstr (plen
, (ULONGEST
) units_written
,
7821 *plen
= ':'; /* overwrite \0 from hexnumnstr() */
7826 /* Normal mode: Send target system values byte by byte, in
7827 increasing byte addresses. Each byte is encoded as a two hex
7829 p
+= 2 * bin2hex (myaddr
, p
, todo_units
* unit_size
);
7830 units_written
= todo_units
;
7833 putpkt_binary (rs
->buf
, (int) (p
- rs
->buf
));
7834 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7836 if (rs
->buf
[0] == 'E')
7837 return TARGET_XFER_E_IO
;
7839 /* Return UNITS_WRITTEN, not TODO_UNITS, in case escape chars caused us to
7840 send fewer units than we'd planned. */
7841 *xfered_len_units
= (ULONGEST
) units_written
;
7842 return TARGET_XFER_OK
;
7845 /* Write memory data directly to the remote machine.
7846 This does not inform the data cache; the data cache uses this.
7847 MEMADDR is the address in the remote memory space.
7848 MYADDR is the address of the buffer in our space.
7849 LEN is the number of bytes.
7851 Return the transferred status, error or OK (an
7852 'enum target_xfer_status' value). Save the number of bytes
7853 transferred in *XFERED_LEN. Only transfer a single packet. */
7855 static enum target_xfer_status
7856 remote_write_bytes (CORE_ADDR memaddr
, const gdb_byte
*myaddr
, ULONGEST len
,
7857 int unit_size
, ULONGEST
*xfered_len
)
7859 char *packet_format
= 0;
7861 /* Check whether the target supports binary download. */
7862 check_binary_download (memaddr
);
7864 switch (packet_support (PACKET_X
))
7867 packet_format
= "X";
7869 case PACKET_DISABLE
:
7870 packet_format
= "M";
7872 case PACKET_SUPPORT_UNKNOWN
:
7873 internal_error (__FILE__
, __LINE__
,
7874 _("remote_write_bytes: bad internal state"));
7876 internal_error (__FILE__
, __LINE__
, _("bad switch"));
7879 return remote_write_bytes_aux (packet_format
,
7880 memaddr
, myaddr
, len
, unit_size
, xfered_len
,
7881 packet_format
[0], 1);
7884 /* Read memory data directly from the remote machine.
7885 This does not use the data cache; the data cache uses this.
7886 MEMADDR is the address in the remote memory space.
7887 MYADDR is the address of the buffer in our space.
7888 LEN_UNITS is the number of addressable memory units to read..
7889 UNIT_SIZE is the length in bytes of an addressable unit.
7891 Return the transferred status, error or OK (an
7892 'enum target_xfer_status' value). Save the number of bytes
7893 transferred in *XFERED_LEN_UNITS.
7895 See the comment of remote_write_bytes_aux for an example of
7896 memory read/write exchange between gdb and the stub. */
7898 static enum target_xfer_status
7899 remote_read_bytes_1 (CORE_ADDR memaddr
, gdb_byte
*myaddr
, ULONGEST len_units
,
7900 int unit_size
, ULONGEST
*xfered_len_units
)
7902 struct remote_state
*rs
= get_remote_state ();
7903 int buf_size_bytes
; /* Max size of packet output buffer. */
7908 buf_size_bytes
= get_memory_read_packet_size ();
7909 /* The packet buffer will be large enough for the payload;
7910 get_memory_packet_size ensures this. */
7912 /* Number of units that will fit. */
7913 todo_units
= min (len_units
, (buf_size_bytes
/ unit_size
) / 2);
7915 /* Construct "m"<memaddr>","<len>". */
7916 memaddr
= remote_address_masked (memaddr
);
7919 p
+= hexnumstr (p
, (ULONGEST
) memaddr
);
7921 p
+= hexnumstr (p
, (ULONGEST
) todo_units
);
7924 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
7925 if (rs
->buf
[0] == 'E'
7926 && isxdigit (rs
->buf
[1]) && isxdigit (rs
->buf
[2])
7927 && rs
->buf
[3] == '\0')
7928 return TARGET_XFER_E_IO
;
7929 /* Reply describes memory byte by byte, each byte encoded as two hex
7932 decoded_bytes
= hex2bin (p
, myaddr
, todo_units
* unit_size
);
7933 /* Return what we have. Let higher layers handle partial reads. */
7934 *xfered_len_units
= (ULONGEST
) (decoded_bytes
/ unit_size
);
7935 return TARGET_XFER_OK
;
7938 /* Using the set of read-only target sections of remote, read live
7941 For interface/parameters/return description see target.h,
7944 static enum target_xfer_status
7945 remote_xfer_live_readonly_partial (struct target_ops
*ops
, gdb_byte
*readbuf
,
7946 ULONGEST memaddr
, ULONGEST len
,
7947 int unit_size
, ULONGEST
*xfered_len
)
7949 struct target_section
*secp
;
7950 struct target_section_table
*table
;
7952 secp
= target_section_by_addr (ops
, memaddr
);
7954 && (bfd_get_section_flags (secp
->the_bfd_section
->owner
,
7955 secp
->the_bfd_section
)
7958 struct target_section
*p
;
7959 ULONGEST memend
= memaddr
+ len
;
7961 table
= target_get_section_table (ops
);
7963 for (p
= table
->sections
; p
< table
->sections_end
; p
++)
7965 if (memaddr
>= p
->addr
)
7967 if (memend
<= p
->endaddr
)
7969 /* Entire transfer is within this section. */
7970 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
7973 else if (memaddr
>= p
->endaddr
)
7975 /* This section ends before the transfer starts. */
7980 /* This section overlaps the transfer. Just do half. */
7981 len
= p
->endaddr
- memaddr
;
7982 return remote_read_bytes_1 (memaddr
, readbuf
, len
, unit_size
,
7989 return TARGET_XFER_EOF
;
7992 /* Similar to remote_read_bytes_1, but it reads from the remote stub
7993 first if the requested memory is unavailable in traceframe.
7994 Otherwise, fall back to remote_read_bytes_1. */
7996 static enum target_xfer_status
7997 remote_read_bytes (struct target_ops
*ops
, CORE_ADDR memaddr
,
7998 gdb_byte
*myaddr
, ULONGEST len
, int unit_size
,
7999 ULONGEST
*xfered_len
)
8002 return TARGET_XFER_EOF
;
8004 if (get_traceframe_number () != -1)
8006 VEC(mem_range_s
) *available
;
8008 /* If we fail to get the set of available memory, then the
8009 target does not support querying traceframe info, and so we
8010 attempt reading from the traceframe anyway (assuming the
8011 target implements the old QTro packet then). */
8012 if (traceframe_available_memory (&available
, memaddr
, len
))
8014 struct cleanup
*old_chain
;
8016 old_chain
= make_cleanup (VEC_cleanup(mem_range_s
), &available
);
8018 if (VEC_empty (mem_range_s
, available
)
8019 || VEC_index (mem_range_s
, available
, 0)->start
!= memaddr
)
8021 enum target_xfer_status res
;
8023 /* Don't read into the traceframe's available
8025 if (!VEC_empty (mem_range_s
, available
))
8027 LONGEST oldlen
= len
;
8029 len
= VEC_index (mem_range_s
, available
, 0)->start
- memaddr
;
8030 gdb_assert (len
<= oldlen
);
8033 do_cleanups (old_chain
);
8035 /* This goes through the topmost target again. */
8036 res
= remote_xfer_live_readonly_partial (ops
, myaddr
, memaddr
,
8037 len
, unit_size
, xfered_len
);
8038 if (res
== TARGET_XFER_OK
)
8039 return TARGET_XFER_OK
;
8042 /* No use trying further, we know some memory starting
8043 at MEMADDR isn't available. */
8045 return TARGET_XFER_UNAVAILABLE
;
8049 /* Don't try to read more than how much is available, in
8050 case the target implements the deprecated QTro packet to
8051 cater for older GDBs (the target's knowledge of read-only
8052 sections may be outdated by now). */
8053 len
= VEC_index (mem_range_s
, available
, 0)->length
;
8055 do_cleanups (old_chain
);
8059 return remote_read_bytes_1 (memaddr
, myaddr
, len
, unit_size
, xfered_len
);
8064 /* Sends a packet with content determined by the printf format string
8065 FORMAT and the remaining arguments, then gets the reply. Returns
8066 whether the packet was a success, a failure, or unknown. */
8068 static enum packet_result
remote_send_printf (const char *format
, ...)
8069 ATTRIBUTE_PRINTF (1, 2);
8071 static enum packet_result
8072 remote_send_printf (const char *format
, ...)
8074 struct remote_state
*rs
= get_remote_state ();
8075 int max_size
= get_remote_packet_size ();
8078 va_start (ap
, format
);
8081 if (vsnprintf (rs
->buf
, max_size
, format
, ap
) >= max_size
)
8082 internal_error (__FILE__
, __LINE__
, _("Too long remote packet."));
8084 if (putpkt (rs
->buf
) < 0)
8085 error (_("Communication problem with target."));
8088 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8090 return packet_check_result (rs
->buf
);
8094 restore_remote_timeout (void *p
)
8096 int value
= *(int *)p
;
8098 remote_timeout
= value
;
8101 /* Flash writing can take quite some time. We'll set
8102 effectively infinite timeout for flash operations.
8103 In future, we'll need to decide on a better approach. */
8104 static const int remote_flash_timeout
= 1000;
8107 remote_flash_erase (struct target_ops
*ops
,
8108 ULONGEST address
, LONGEST length
)
8110 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
8111 int saved_remote_timeout
= remote_timeout
;
8112 enum packet_result ret
;
8113 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
8114 &saved_remote_timeout
);
8116 remote_timeout
= remote_flash_timeout
;
8118 ret
= remote_send_printf ("vFlashErase:%s,%s",
8119 phex (address
, addr_size
),
8123 case PACKET_UNKNOWN
:
8124 error (_("Remote target does not support flash erase"));
8126 error (_("Error erasing flash with vFlashErase packet"));
8131 do_cleanups (back_to
);
8134 static enum target_xfer_status
8135 remote_flash_write (struct target_ops
*ops
, ULONGEST address
,
8136 ULONGEST length
, ULONGEST
*xfered_len
,
8137 const gdb_byte
*data
)
8139 int saved_remote_timeout
= remote_timeout
;
8140 enum target_xfer_status ret
;
8141 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
8142 &saved_remote_timeout
);
8144 remote_timeout
= remote_flash_timeout
;
8145 ret
= remote_write_bytes_aux ("vFlashWrite:", address
, data
, length
, 1,
8147 do_cleanups (back_to
);
8153 remote_flash_done (struct target_ops
*ops
)
8155 int saved_remote_timeout
= remote_timeout
;
8157 struct cleanup
*back_to
= make_cleanup (restore_remote_timeout
,
8158 &saved_remote_timeout
);
8160 remote_timeout
= remote_flash_timeout
;
8161 ret
= remote_send_printf ("vFlashDone");
8162 do_cleanups (back_to
);
8166 case PACKET_UNKNOWN
:
8167 error (_("Remote target does not support vFlashDone"));
8169 error (_("Error finishing flash operation"));
8176 remote_files_info (struct target_ops
*ignore
)
8178 puts_filtered ("Debugging a target over a serial line.\n");
8181 /* Stuff for dealing with the packets which are part of this protocol.
8182 See comment at top of file for details. */
8184 /* Close/unpush the remote target, and throw a TARGET_CLOSE_ERROR
8185 error to higher layers. Called when a serial error is detected.
8186 The exception message is STRING, followed by a colon and a blank,
8187 the system error message for errno at function entry and final dot
8188 for output compatibility with throw_perror_with_name. */
8191 unpush_and_perror (const char *string
)
8193 int saved_errno
= errno
;
8195 remote_unpush_target ();
8196 throw_error (TARGET_CLOSE_ERROR
, "%s: %s.", string
,
8197 safe_strerror (saved_errno
));
8200 /* Read a single character from the remote end. */
8203 readchar (int timeout
)
8206 struct remote_state
*rs
= get_remote_state ();
8208 ch
= serial_readchar (rs
->remote_desc
, timeout
);
8213 switch ((enum serial_rc
) ch
)
8216 remote_unpush_target ();
8217 throw_error (TARGET_CLOSE_ERROR
, _("Remote connection closed"));
8220 unpush_and_perror (_("Remote communication error. "
8221 "Target disconnected."));
8223 case SERIAL_TIMEOUT
:
8229 /* Wrapper for serial_write that closes the target and throws if
8233 remote_serial_write (const char *str
, int len
)
8235 struct remote_state
*rs
= get_remote_state ();
8237 if (serial_write (rs
->remote_desc
, str
, len
))
8239 unpush_and_perror (_("Remote communication error. "
8240 "Target disconnected."));
8244 /* Send the command in *BUF to the remote machine, and read the reply
8245 into *BUF. Report an error if we get an error reply. Resize
8246 *BUF using xrealloc if necessary to hold the result, and update
8250 remote_send (char **buf
,
8254 getpkt (buf
, sizeof_buf
, 0);
8256 if ((*buf
)[0] == 'E')
8257 error (_("Remote failure reply: %s"), *buf
);
8260 /* Return a pointer to an xmalloc'ed string representing an escaped
8261 version of BUF, of len N. E.g. \n is converted to \\n, \t to \\t,
8262 etc. The caller is responsible for releasing the returned
8266 escape_buffer (const char *buf
, int n
)
8268 struct cleanup
*old_chain
;
8269 struct ui_file
*stb
;
8272 stb
= mem_fileopen ();
8273 old_chain
= make_cleanup_ui_file_delete (stb
);
8275 fputstrn_unfiltered (buf
, n
, '\\', stb
);
8276 str
= ui_file_xstrdup (stb
, NULL
);
8277 do_cleanups (old_chain
);
8281 /* Display a null-terminated packet on stdout, for debugging, using C
8285 print_packet (const char *buf
)
8287 puts_filtered ("\"");
8288 fputstr_filtered (buf
, '"', gdb_stdout
);
8289 puts_filtered ("\"");
8293 putpkt (const char *buf
)
8295 return putpkt_binary (buf
, strlen (buf
));
8298 /* Send a packet to the remote machine, with error checking. The data
8299 of the packet is in BUF. The string in BUF can be at most
8300 get_remote_packet_size () - 5 to account for the $, # and checksum,
8301 and for a possible /0 if we are debugging (remote_debug) and want
8302 to print the sent packet as a string. */
8305 putpkt_binary (const char *buf
, int cnt
)
8307 struct remote_state
*rs
= get_remote_state ();
8309 unsigned char csum
= 0;
8310 char *buf2
= (char *) xmalloc (cnt
+ 6);
8311 struct cleanup
*old_chain
= make_cleanup (xfree
, buf2
);
8317 /* Catch cases like trying to read memory or listing threads while
8318 we're waiting for a stop reply. The remote server wouldn't be
8319 ready to handle this request, so we'd hang and timeout. We don't
8320 have to worry about this in synchronous mode, because in that
8321 case it's not possible to issue a command while the target is
8322 running. This is not a problem in non-stop mode, because in that
8323 case, the stub is always ready to process serial input. */
8324 if (!target_is_non_stop_p ()
8325 && target_is_async_p ()
8326 && rs
->waiting_for_stop_reply
)
8328 error (_("Cannot execute this command while the target is running.\n"
8329 "Use the \"interrupt\" command to stop the target\n"
8330 "and then try again."));
8333 /* We're sending out a new packet. Make sure we don't look at a
8334 stale cached response. */
8335 rs
->cached_wait_status
= 0;
8337 /* Copy the packet into buffer BUF2, encapsulating it
8338 and giving it a checksum. */
8343 for (i
= 0; i
< cnt
; i
++)
8349 *p
++ = tohex ((csum
>> 4) & 0xf);
8350 *p
++ = tohex (csum
& 0xf);
8352 /* Send it over and over until we get a positive ack. */
8356 int started_error_output
= 0;
8360 struct cleanup
*old_chain
;
8364 str
= escape_buffer (buf2
, p
- buf2
);
8365 old_chain
= make_cleanup (xfree
, str
);
8366 fprintf_unfiltered (gdb_stdlog
, "Sending packet: %s...", str
);
8367 gdb_flush (gdb_stdlog
);
8368 do_cleanups (old_chain
);
8370 remote_serial_write (buf2
, p
- buf2
);
8372 /* If this is a no acks version of the remote protocol, send the
8373 packet and move on. */
8377 /* Read until either a timeout occurs (-2) or '+' is read.
8378 Handle any notification that arrives in the mean time. */
8381 ch
= readchar (remote_timeout
);
8389 case SERIAL_TIMEOUT
:
8392 if (started_error_output
)
8394 putchar_unfiltered ('\n');
8395 started_error_output
= 0;
8404 fprintf_unfiltered (gdb_stdlog
, "Ack\n");
8405 do_cleanups (old_chain
);
8409 fprintf_unfiltered (gdb_stdlog
, "Nak\n");
8411 case SERIAL_TIMEOUT
:
8415 do_cleanups (old_chain
);
8418 break; /* Retransmit buffer. */
8422 fprintf_unfiltered (gdb_stdlog
,
8423 "Packet instead of Ack, ignoring it\n");
8424 /* It's probably an old response sent because an ACK
8425 was lost. Gobble up the packet and ack it so it
8426 doesn't get retransmitted when we resend this
8429 remote_serial_write ("+", 1);
8430 continue; /* Now, go look for +. */
8437 /* If we got a notification, handle it, and go back to looking
8439 /* We've found the start of a notification. Now
8440 collect the data. */
8441 val
= read_frame (&rs
->buf
, &rs
->buf_size
);
8446 struct cleanup
*old_chain
;
8449 str
= escape_buffer (rs
->buf
, val
);
8450 old_chain
= make_cleanup (xfree
, str
);
8451 fprintf_unfiltered (gdb_stdlog
,
8452 " Notification received: %s\n",
8454 do_cleanups (old_chain
);
8456 handle_notification (rs
->notif_state
, rs
->buf
);
8457 /* We're in sync now, rewait for the ack. */
8464 if (!started_error_output
)
8466 started_error_output
= 1;
8467 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8469 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8470 fprintf_unfiltered (gdb_stdlog
, "%s", rs
->buf
);
8479 if (!started_error_output
)
8481 started_error_output
= 1;
8482 fprintf_unfiltered (gdb_stdlog
, "putpkt: Junk: ");
8484 fputc_unfiltered (ch
& 0177, gdb_stdlog
);
8488 break; /* Here to retransmit. */
8492 /* This is wrong. If doing a long backtrace, the user should be
8493 able to get out next time we call QUIT, without anything as
8494 violent as interrupt_query. If we want to provide a way out of
8495 here without getting to the next QUIT, it should be based on
8496 hitting ^C twice as in remote_wait. */
8505 do_cleanups (old_chain
);
8509 /* Come here after finding the start of a frame when we expected an
8510 ack. Do our best to discard the rest of this packet. */
8519 c
= readchar (remote_timeout
);
8522 case SERIAL_TIMEOUT
:
8523 /* Nothing we can do. */
8526 /* Discard the two bytes of checksum and stop. */
8527 c
= readchar (remote_timeout
);
8529 c
= readchar (remote_timeout
);
8532 case '*': /* Run length encoding. */
8533 /* Discard the repeat count. */
8534 c
= readchar (remote_timeout
);
8539 /* A regular character. */
8545 /* Come here after finding the start of the frame. Collect the rest
8546 into *BUF, verifying the checksum, length, and handling run-length
8547 compression. NUL terminate the buffer. If there is not enough room,
8548 expand *BUF using xrealloc.
8550 Returns -1 on error, number of characters in buffer (ignoring the
8551 trailing NULL) on success. (could be extended to return one of the
8552 SERIAL status indications). */
8555 read_frame (char **buf_p
,
8562 struct remote_state
*rs
= get_remote_state ();
8569 c
= readchar (remote_timeout
);
8572 case SERIAL_TIMEOUT
:
8574 fputs_filtered ("Timeout in mid-packet, retrying\n", gdb_stdlog
);
8578 fputs_filtered ("Saw new packet start in middle of old one\n",
8580 return -1; /* Start a new packet, count retries. */
8583 unsigned char pktcsum
;
8589 check_0
= readchar (remote_timeout
);
8591 check_1
= readchar (remote_timeout
);
8593 if (check_0
== SERIAL_TIMEOUT
|| check_1
== SERIAL_TIMEOUT
)
8596 fputs_filtered ("Timeout in checksum, retrying\n",
8600 else if (check_0
< 0 || check_1
< 0)
8603 fputs_filtered ("Communication error in checksum\n",
8608 /* Don't recompute the checksum; with no ack packets we
8609 don't have any way to indicate a packet retransmission
8614 pktcsum
= (fromhex (check_0
) << 4) | fromhex (check_1
);
8615 if (csum
== pktcsum
)
8620 struct cleanup
*old_chain
;
8623 str
= escape_buffer (buf
, bc
);
8624 old_chain
= make_cleanup (xfree
, str
);
8625 fprintf_unfiltered (gdb_stdlog
,
8626 "Bad checksum, sentsum=0x%x, "
8627 "csum=0x%x, buf=%s\n",
8628 pktcsum
, csum
, str
);
8629 do_cleanups (old_chain
);
8631 /* Number of characters in buffer ignoring trailing
8635 case '*': /* Run length encoding. */
8640 c
= readchar (remote_timeout
);
8642 repeat
= c
- ' ' + 3; /* Compute repeat count. */
8644 /* The character before ``*'' is repeated. */
8646 if (repeat
> 0 && repeat
<= 255 && bc
> 0)
8648 if (bc
+ repeat
- 1 >= *sizeof_buf
- 1)
8650 /* Make some more room in the buffer. */
8651 *sizeof_buf
+= repeat
;
8652 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
8656 memset (&buf
[bc
], buf
[bc
- 1], repeat
);
8662 printf_filtered (_("Invalid run length encoding: %s\n"), buf
);
8666 if (bc
>= *sizeof_buf
- 1)
8668 /* Make some more room in the buffer. */
8670 *buf_p
= (char *) xrealloc (*buf_p
, *sizeof_buf
);
8681 /* Read a packet from the remote machine, with error checking, and
8682 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
8683 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
8684 rather than timing out; this is used (in synchronous mode) to wait
8685 for a target that is is executing user code to stop. */
8686 /* FIXME: ezannoni 2000-02-01 this wrapper is necessary so that we
8687 don't have to change all the calls to getpkt to deal with the
8688 return value, because at the moment I don't know what the right
8689 thing to do it for those. */
8695 getpkt_sane (buf
, sizeof_buf
, forever
);
8699 /* Read a packet from the remote machine, with error checking, and
8700 store it in *BUF. Resize *BUF using xrealloc if necessary to hold
8701 the result, and update *SIZEOF_BUF. If FOREVER, wait forever
8702 rather than timing out; this is used (in synchronous mode) to wait
8703 for a target that is is executing user code to stop. If FOREVER ==
8704 0, this function is allowed to time out gracefully and return an
8705 indication of this to the caller. Otherwise return the number of
8706 bytes read. If EXPECTING_NOTIF, consider receiving a notification
8707 enough reason to return to the caller. *IS_NOTIF is an output
8708 boolean that indicates whether *BUF holds a notification or not
8709 (a regular packet). */
8712 getpkt_or_notif_sane_1 (char **buf
, long *sizeof_buf
, int forever
,
8713 int expecting_notif
, int *is_notif
)
8715 struct remote_state
*rs
= get_remote_state ();
8721 /* We're reading a new response. Make sure we don't look at a
8722 previously cached response. */
8723 rs
->cached_wait_status
= 0;
8725 strcpy (*buf
, "timeout");
8728 timeout
= watchdog
> 0 ? watchdog
: -1;
8729 else if (expecting_notif
)
8730 timeout
= 0; /* There should already be a char in the buffer. If
8733 timeout
= remote_timeout
;
8737 /* Process any number of notifications, and then return when
8741 /* If we get a timeout or bad checksum, retry up to MAX_TRIES
8743 for (tries
= 1; tries
<= MAX_TRIES
; tries
++)
8745 /* This can loop forever if the remote side sends us
8746 characters continuously, but if it pauses, we'll get
8747 SERIAL_TIMEOUT from readchar because of timeout. Then
8748 we'll count that as a retry.
8750 Note that even when forever is set, we will only wait
8751 forever prior to the start of a packet. After that, we
8752 expect characters to arrive at a brisk pace. They should
8753 show up within remote_timeout intervals. */
8755 c
= readchar (timeout
);
8756 while (c
!= SERIAL_TIMEOUT
&& c
!= '$' && c
!= '%');
8758 if (c
== SERIAL_TIMEOUT
)
8760 if (expecting_notif
)
8761 return -1; /* Don't complain, it's normal to not get
8762 anything in this case. */
8764 if (forever
) /* Watchdog went off? Kill the target. */
8767 remote_unpush_target ();
8768 throw_error (TARGET_CLOSE_ERROR
,
8769 _("Watchdog timeout has expired. "
8770 "Target detached."));
8773 fputs_filtered ("Timed out.\n", gdb_stdlog
);
8777 /* We've found the start of a packet or notification.
8778 Now collect the data. */
8779 val
= read_frame (buf
, sizeof_buf
);
8784 remote_serial_write ("-", 1);
8787 if (tries
> MAX_TRIES
)
8789 /* We have tried hard enough, and just can't receive the
8790 packet/notification. Give up. */
8791 printf_unfiltered (_("Ignoring packet error, continuing...\n"));
8793 /* Skip the ack char if we're in no-ack mode. */
8794 if (!rs
->noack_mode
)
8795 remote_serial_write ("+", 1);
8799 /* If we got an ordinary packet, return that to our caller. */
8804 struct cleanup
*old_chain
;
8807 str
= escape_buffer (*buf
, val
);
8808 old_chain
= make_cleanup (xfree
, str
);
8809 fprintf_unfiltered (gdb_stdlog
, "Packet received: %s\n", str
);
8810 do_cleanups (old_chain
);
8813 /* Skip the ack char if we're in no-ack mode. */
8814 if (!rs
->noack_mode
)
8815 remote_serial_write ("+", 1);
8816 if (is_notif
!= NULL
)
8821 /* If we got a notification, handle it, and go back to looking
8825 gdb_assert (c
== '%');
8829 struct cleanup
*old_chain
;
8832 str
= escape_buffer (*buf
, val
);
8833 old_chain
= make_cleanup (xfree
, str
);
8834 fprintf_unfiltered (gdb_stdlog
,
8835 " Notification received: %s\n",
8837 do_cleanups (old_chain
);
8839 if (is_notif
!= NULL
)
8842 handle_notification (rs
->notif_state
, *buf
);
8844 /* Notifications require no acknowledgement. */
8846 if (expecting_notif
)
8853 getpkt_sane (char **buf
, long *sizeof_buf
, int forever
)
8855 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 0, NULL
);
8859 getpkt_or_notif_sane (char **buf
, long *sizeof_buf
, int forever
,
8862 return getpkt_or_notif_sane_1 (buf
, sizeof_buf
, forever
, 1,
8866 /* Check whether EVENT is a fork event for the process specified
8867 by the pid passed in DATA, and if it is, kill the fork child. */
8870 kill_child_of_pending_fork (QUEUE (stop_reply_p
) *q
,
8871 QUEUE_ITER (stop_reply_p
) *iter
,
8875 struct queue_iter_param
*param
= (struct queue_iter_param
*) data
;
8876 int parent_pid
= *(int *) param
->input
;
8878 if (is_pending_fork_parent (&event
->ws
, parent_pid
, event
->ptid
))
8880 struct remote_state
*rs
= get_remote_state ();
8881 int child_pid
= ptid_get_pid (event
->ws
.value
.related_pid
);
8884 res
= remote_vkill (child_pid
, rs
);
8886 error (_("Can't kill fork child process %d"), child_pid
);
8892 /* Kill any new fork children of process PID that haven't been
8893 processed by follow_fork. */
8896 kill_new_fork_children (int pid
, struct remote_state
*rs
)
8898 struct thread_info
*thread
;
8899 struct notif_client
*notif
= ¬if_client_stop
;
8900 struct queue_iter_param param
;
8902 /* Kill the fork child threads of any threads in process PID
8903 that are stopped at a fork event. */
8904 ALL_NON_EXITED_THREADS (thread
)
8906 struct target_waitstatus
*ws
= &thread
->pending_follow
;
8908 if (is_pending_fork_parent (ws
, pid
, thread
->ptid
))
8910 struct remote_state
*rs
= get_remote_state ();
8911 int child_pid
= ptid_get_pid (ws
->value
.related_pid
);
8914 res
= remote_vkill (child_pid
, rs
);
8916 error (_("Can't kill fork child process %d"), child_pid
);
8920 /* Check for any pending fork events (not reported or processed yet)
8921 in process PID and kill those fork child threads as well. */
8922 remote_notif_get_pending_events (notif
);
8924 param
.output
= NULL
;
8925 QUEUE_iterate (stop_reply_p
, stop_reply_queue
,
8926 kill_child_of_pending_fork
, ¶m
);
8930 /* Target hook to kill the current inferior. */
8933 remote_kill (struct target_ops
*ops
)
8936 int pid
= ptid_get_pid (inferior_ptid
);
8937 struct remote_state
*rs
= get_remote_state ();
8939 if (packet_support (PACKET_vKill
) != PACKET_DISABLE
)
8941 /* If we're stopped while forking and we haven't followed yet,
8942 kill the child task. We need to do this before killing the
8943 parent task because if this is a vfork then the parent will
8945 kill_new_fork_children (pid
, rs
);
8947 res
= remote_vkill (pid
, rs
);
8950 target_mourn_inferior ();
8955 /* If we are in 'target remote' mode and we are killing the only
8956 inferior, then we will tell gdbserver to exit and unpush the
8958 if (res
== -1 && !remote_multi_process_p (rs
)
8959 && number_of_live_inferiors () == 1)
8963 /* We've killed the remote end, we get to mourn it. If we are
8964 not in extended mode, mourning the inferior also unpushes
8965 remote_ops from the target stack, which closes the remote
8967 target_mourn_inferior ();
8972 error (_("Can't kill process"));
8975 /* Send a kill request to the target using the 'vKill' packet. */
8978 remote_vkill (int pid
, struct remote_state
*rs
)
8980 if (packet_support (PACKET_vKill
) == PACKET_DISABLE
)
8983 /* Tell the remote target to detach. */
8984 xsnprintf (rs
->buf
, get_remote_packet_size (), "vKill;%x", pid
);
8986 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
8988 switch (packet_ok (rs
->buf
,
8989 &remote_protocol_packets
[PACKET_vKill
]))
8995 case PACKET_UNKNOWN
:
8998 internal_error (__FILE__
, __LINE__
, _("Bad result from packet_ok"));
9002 /* Send a kill request to the target using the 'k' packet. */
9005 remote_kill_k (void)
9007 /* Catch errors so the user can quit from gdb even when we
9008 aren't on speaking terms with the remote system. */
9013 CATCH (ex
, RETURN_MASK_ERROR
)
9015 if (ex
.error
== TARGET_CLOSE_ERROR
)
9017 /* If we got an (EOF) error that caused the target
9018 to go away, then we're done, that's what we wanted.
9019 "k" is susceptible to cause a premature EOF, given
9020 that the remote server isn't actually required to
9021 reply to "k", and it can happen that it doesn't
9022 even get to reply ACK to the "k". */
9026 /* Otherwise, something went wrong. We didn't actually kill
9027 the target. Just propagate the exception, and let the
9028 user or higher layers decide what to do. */
9029 throw_exception (ex
);
9035 remote_mourn (struct target_ops
*target
)
9037 struct remote_state
*rs
= get_remote_state ();
9039 /* In 'target remote' mode with one inferior, we close the connection. */
9040 if (!rs
->extended
&& number_of_live_inferiors () <= 1)
9042 unpush_target (target
);
9044 /* remote_close takes care of doing most of the clean up. */
9045 generic_mourn_inferior ();
9049 /* In case we got here due to an error, but we're going to stay
9051 rs
->waiting_for_stop_reply
= 0;
9053 /* If the current general thread belonged to the process we just
9054 detached from or has exited, the remote side current general
9055 thread becomes undefined. Considering a case like this:
9057 - We just got here due to a detach.
9058 - The process that we're detaching from happens to immediately
9059 report a global breakpoint being hit in non-stop mode, in the
9060 same thread we had selected before.
9061 - GDB attaches to this process again.
9062 - This event happens to be the next event we handle.
9064 GDB would consider that the current general thread didn't need to
9065 be set on the stub side (with Hg), since for all it knew,
9066 GENERAL_THREAD hadn't changed.
9068 Notice that although in all-stop mode, the remote server always
9069 sets the current thread to the thread reporting the stop event,
9070 that doesn't happen in non-stop mode; in non-stop, the stub *must
9071 not* change the current thread when reporting a breakpoint hit,
9072 due to the decoupling of event reporting and event handling.
9074 To keep things simple, we always invalidate our notion of the
9076 record_currthread (rs
, minus_one_ptid
);
9078 /* Call common code to mark the inferior as not running. */
9079 generic_mourn_inferior ();
9081 if (!have_inferiors ())
9083 if (!remote_multi_process_p (rs
))
9085 /* Check whether the target is running now - some remote stubs
9086 automatically restart after kill. */
9088 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9090 if (rs
->buf
[0] == 'S' || rs
->buf
[0] == 'T')
9092 /* Assume that the target has been restarted. Set
9093 inferior_ptid so that bits of core GDB realizes
9094 there's something here, e.g., so that the user can
9095 say "kill" again. */
9096 inferior_ptid
= magic_null_ptid
;
9103 extended_remote_supports_disable_randomization (struct target_ops
*self
)
9105 return packet_support (PACKET_QDisableRandomization
) == PACKET_ENABLE
;
9109 extended_remote_disable_randomization (int val
)
9111 struct remote_state
*rs
= get_remote_state ();
9114 xsnprintf (rs
->buf
, get_remote_packet_size (), "QDisableRandomization:%x",
9117 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
9119 error (_("Target does not support QDisableRandomization."));
9120 if (strcmp (reply
, "OK") != 0)
9121 error (_("Bogus QDisableRandomization reply from target: %s"), reply
);
9125 extended_remote_run (char *args
)
9127 struct remote_state
*rs
= get_remote_state ();
9129 const char *remote_exec_file
= get_remote_exec_file ();
9131 /* If the user has disabled vRun support, or we have detected that
9132 support is not available, do not try it. */
9133 if (packet_support (PACKET_vRun
) == PACKET_DISABLE
)
9136 strcpy (rs
->buf
, "vRun;");
9137 len
= strlen (rs
->buf
);
9139 if (strlen (remote_exec_file
) * 2 + len
>= get_remote_packet_size ())
9140 error (_("Remote file name too long for run packet"));
9141 len
+= 2 * bin2hex ((gdb_byte
*) remote_exec_file
, rs
->buf
+ len
,
9142 strlen (remote_exec_file
));
9144 gdb_assert (args
!= NULL
);
9147 struct cleanup
*back_to
;
9151 argv
= gdb_buildargv (args
);
9152 back_to
= make_cleanup_freeargv (argv
);
9153 for (i
= 0; argv
[i
] != NULL
; i
++)
9155 if (strlen (argv
[i
]) * 2 + 1 + len
>= get_remote_packet_size ())
9156 error (_("Argument list too long for run packet"));
9157 rs
->buf
[len
++] = ';';
9158 len
+= 2 * bin2hex ((gdb_byte
*) argv
[i
], rs
->buf
+ len
,
9161 do_cleanups (back_to
);
9164 rs
->buf
[len
++] = '\0';
9167 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9169 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_vRun
]))
9172 /* We have a wait response. All is well. */
9174 case PACKET_UNKNOWN
:
9177 if (remote_exec_file
[0] == '\0')
9178 error (_("Running the default executable on the remote target failed; "
9179 "try \"set remote exec-file\"?"));
9181 error (_("Running \"%s\" on the remote target failed"),
9184 gdb_assert_not_reached (_("bad switch"));
9188 /* In the extended protocol we want to be able to do things like
9189 "run" and have them basically work as expected. So we need
9190 a special create_inferior function. We support changing the
9191 executable file and the command line arguments, but not the
9195 extended_remote_create_inferior (struct target_ops
*ops
,
9196 char *exec_file
, char *args
,
9197 char **env
, int from_tty
)
9201 struct remote_state
*rs
= get_remote_state ();
9202 const char *remote_exec_file
= get_remote_exec_file ();
9204 /* If running asynchronously, register the target file descriptor
9205 with the event loop. */
9206 if (target_can_async_p ())
9209 /* Disable address space randomization if requested (and supported). */
9210 if (extended_remote_supports_disable_randomization (ops
))
9211 extended_remote_disable_randomization (disable_randomization
);
9213 /* Now restart the remote server. */
9214 run_worked
= extended_remote_run (args
) != -1;
9217 /* vRun was not supported. Fail if we need it to do what the
9219 if (remote_exec_file
[0])
9220 error (_("Remote target does not support \"set remote exec-file\""));
9222 error (_("Remote target does not support \"set args\" or run <ARGS>"));
9224 /* Fall back to "R". */
9225 extended_remote_restart ();
9228 if (!have_inferiors ())
9230 /* Clean up from the last time we ran, before we mark the target
9231 running again. This will mark breakpoints uninserted, and
9232 get_offsets may insert breakpoints. */
9233 init_thread_list ();
9234 init_wait_for_inferior ();
9237 /* vRun's success return is a stop reply. */
9238 stop_reply
= run_worked
? rs
->buf
: NULL
;
9239 add_current_inferior_and_thread (stop_reply
);
9241 /* Get updated offsets, if the stub uses qOffsets. */
9246 /* Given a location's target info BP_TGT and the packet buffer BUF, output
9247 the list of conditions (in agent expression bytecode format), if any, the
9248 target needs to evaluate. The output is placed into the packet buffer
9249 started from BUF and ended at BUF_END. */
9252 remote_add_target_side_condition (struct gdbarch
*gdbarch
,
9253 struct bp_target_info
*bp_tgt
, char *buf
,
9256 struct agent_expr
*aexpr
= NULL
;
9259 if (VEC_empty (agent_expr_p
, bp_tgt
->conditions
))
9262 buf
+= strlen (buf
);
9263 xsnprintf (buf
, buf_end
- buf
, "%s", ";");
9266 /* Send conditions to the target and free the vector. */
9268 VEC_iterate (agent_expr_p
, bp_tgt
->conditions
, ix
, aexpr
);
9271 xsnprintf (buf
, buf_end
- buf
, "X%x,", aexpr
->len
);
9272 buf
+= strlen (buf
);
9273 for (i
= 0; i
< aexpr
->len
; ++i
)
9274 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9281 remote_add_target_side_commands (struct gdbarch
*gdbarch
,
9282 struct bp_target_info
*bp_tgt
, char *buf
)
9284 struct agent_expr
*aexpr
= NULL
;
9287 if (VEC_empty (agent_expr_p
, bp_tgt
->tcommands
))
9290 buf
+= strlen (buf
);
9292 sprintf (buf
, ";cmds:%x,", bp_tgt
->persist
);
9293 buf
+= strlen (buf
);
9295 /* Concatenate all the agent expressions that are commands into the
9298 VEC_iterate (agent_expr_p
, bp_tgt
->tcommands
, ix
, aexpr
);
9301 sprintf (buf
, "X%x,", aexpr
->len
);
9302 buf
+= strlen (buf
);
9303 for (i
= 0; i
< aexpr
->len
; ++i
)
9304 buf
= pack_hex_byte (buf
, aexpr
->buf
[i
]);
9309 /* Insert a breakpoint. On targets that have software breakpoint
9310 support, we ask the remote target to do the work; on targets
9311 which don't, we insert a traditional memory breakpoint. */
9314 remote_insert_breakpoint (struct target_ops
*ops
,
9315 struct gdbarch
*gdbarch
,
9316 struct bp_target_info
*bp_tgt
)
9318 /* Try the "Z" s/w breakpoint packet if it is not already disabled.
9319 If it succeeds, then set the support to PACKET_ENABLE. If it
9320 fails, and the user has explicitly requested the Z support then
9321 report an error, otherwise, mark it disabled and go on. */
9323 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9325 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9326 struct remote_state
*rs
;
9330 /* Make sure the remote is pointing at the right process, if
9332 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9333 set_general_process ();
9335 gdbarch_remote_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
9337 rs
= get_remote_state ();
9339 endbuf
= rs
->buf
+ get_remote_packet_size ();
9344 addr
= (ULONGEST
) remote_address_masked (addr
);
9345 p
+= hexnumstr (p
, addr
);
9346 xsnprintf (p
, endbuf
- p
, ",%d", bpsize
);
9348 if (remote_supports_cond_breakpoints (ops
))
9349 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9351 if (remote_can_run_breakpoint_commands (ops
))
9352 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9355 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9357 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
]))
9362 bp_tgt
->placed_address
= addr
;
9363 bp_tgt
->placed_size
= bpsize
;
9365 case PACKET_UNKNOWN
:
9370 /* If this breakpoint has target-side commands but this stub doesn't
9371 support Z0 packets, throw error. */
9372 if (!VEC_empty (agent_expr_p
, bp_tgt
->tcommands
))
9373 throw_error (NOT_SUPPORTED_ERROR
, _("\
9374 Target doesn't support breakpoints that have target side commands."));
9376 return memory_insert_breakpoint (ops
, gdbarch
, bp_tgt
);
9380 remote_remove_breakpoint (struct target_ops
*ops
,
9381 struct gdbarch
*gdbarch
,
9382 struct bp_target_info
*bp_tgt
)
9384 CORE_ADDR addr
= bp_tgt
->placed_address
;
9385 struct remote_state
*rs
= get_remote_state ();
9387 if (packet_support (PACKET_Z0
) != PACKET_DISABLE
)
9390 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9392 /* Make sure the remote is pointing at the right process, if
9394 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9395 set_general_process ();
9401 addr
= (ULONGEST
) remote_address_masked (bp_tgt
->placed_address
);
9402 p
+= hexnumstr (p
, addr
);
9403 xsnprintf (p
, endbuf
- p
, ",%d", bp_tgt
->placed_size
);
9406 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9408 return (rs
->buf
[0] == 'E');
9411 return memory_remove_breakpoint (ops
, gdbarch
, bp_tgt
);
9414 static enum Z_packet_type
9415 watchpoint_to_Z_packet (int type
)
9420 return Z_PACKET_WRITE_WP
;
9423 return Z_PACKET_READ_WP
;
9426 return Z_PACKET_ACCESS_WP
;
9429 internal_error (__FILE__
, __LINE__
,
9430 _("hw_bp_to_z: bad watchpoint type %d"), type
);
9435 remote_insert_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9436 enum target_hw_bp_type type
, struct expression
*cond
)
9438 struct remote_state
*rs
= get_remote_state ();
9439 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9441 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9443 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9446 /* Make sure the remote is pointing at the right process, if
9448 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9449 set_general_process ();
9451 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "Z%x,", packet
);
9452 p
= strchr (rs
->buf
, '\0');
9453 addr
= remote_address_masked (addr
);
9454 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9455 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9458 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9460 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9464 case PACKET_UNKNOWN
:
9469 internal_error (__FILE__
, __LINE__
,
9470 _("remote_insert_watchpoint: reached end of function"));
9474 remote_watchpoint_addr_within_range (struct target_ops
*target
, CORE_ADDR addr
,
9475 CORE_ADDR start
, int length
)
9477 CORE_ADDR diff
= remote_address_masked (addr
- start
);
9479 return diff
< length
;
9484 remote_remove_watchpoint (struct target_ops
*self
, CORE_ADDR addr
, int len
,
9485 enum target_hw_bp_type type
, struct expression
*cond
)
9487 struct remote_state
*rs
= get_remote_state ();
9488 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9490 enum Z_packet_type packet
= watchpoint_to_Z_packet (type
);
9492 if (packet_support (PACKET_Z0
+ packet
) == PACKET_DISABLE
)
9495 /* Make sure the remote is pointing at the right process, if
9497 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9498 set_general_process ();
9500 xsnprintf (rs
->buf
, endbuf
- rs
->buf
, "z%x,", packet
);
9501 p
= strchr (rs
->buf
, '\0');
9502 addr
= remote_address_masked (addr
);
9503 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9504 xsnprintf (p
, endbuf
- p
, ",%x", len
);
9506 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9508 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z0
+ packet
]))
9511 case PACKET_UNKNOWN
:
9516 internal_error (__FILE__
, __LINE__
,
9517 _("remote_remove_watchpoint: reached end of function"));
9521 int remote_hw_watchpoint_limit
= -1;
9522 int remote_hw_watchpoint_length_limit
= -1;
9523 int remote_hw_breakpoint_limit
= -1;
9526 remote_region_ok_for_hw_watchpoint (struct target_ops
*self
,
9527 CORE_ADDR addr
, int len
)
9529 if (remote_hw_watchpoint_length_limit
== 0)
9531 else if (remote_hw_watchpoint_length_limit
< 0)
9533 else if (len
<= remote_hw_watchpoint_length_limit
)
9540 remote_check_watch_resources (struct target_ops
*self
,
9541 enum bptype type
, int cnt
, int ot
)
9543 if (type
== bp_hardware_breakpoint
)
9545 if (remote_hw_breakpoint_limit
== 0)
9547 else if (remote_hw_breakpoint_limit
< 0)
9549 else if (cnt
<= remote_hw_breakpoint_limit
)
9554 if (remote_hw_watchpoint_limit
== 0)
9556 else if (remote_hw_watchpoint_limit
< 0)
9560 else if (cnt
<= remote_hw_watchpoint_limit
)
9566 /* The to_stopped_by_sw_breakpoint method of target remote. */
9569 remote_stopped_by_sw_breakpoint (struct target_ops
*ops
)
9571 struct thread_info
*thread
= inferior_thread ();
9573 return (thread
->priv
!= NULL
9574 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_SW_BREAKPOINT
);
9577 /* The to_supports_stopped_by_sw_breakpoint method of target
9581 remote_supports_stopped_by_sw_breakpoint (struct target_ops
*ops
)
9583 return (packet_support (PACKET_swbreak_feature
) == PACKET_ENABLE
);
9586 /* The to_stopped_by_hw_breakpoint method of target remote. */
9589 remote_stopped_by_hw_breakpoint (struct target_ops
*ops
)
9591 struct thread_info
*thread
= inferior_thread ();
9593 return (thread
->priv
!= NULL
9594 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_HW_BREAKPOINT
);
9597 /* The to_supports_stopped_by_hw_breakpoint method of target
9601 remote_supports_stopped_by_hw_breakpoint (struct target_ops
*ops
)
9603 return (packet_support (PACKET_hwbreak_feature
) == PACKET_ENABLE
);
9607 remote_stopped_by_watchpoint (struct target_ops
*ops
)
9609 struct thread_info
*thread
= inferior_thread ();
9611 return (thread
->priv
!= NULL
9612 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
);
9616 remote_stopped_data_address (struct target_ops
*target
, CORE_ADDR
*addr_p
)
9618 struct thread_info
*thread
= inferior_thread ();
9620 if (thread
->priv
!= NULL
9621 && thread
->priv
->stop_reason
== TARGET_STOPPED_BY_WATCHPOINT
)
9623 *addr_p
= thread
->priv
->watch_data_address
;
9632 remote_insert_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
9633 struct bp_target_info
*bp_tgt
)
9635 CORE_ADDR addr
= bp_tgt
->reqstd_address
;
9636 struct remote_state
*rs
;
9641 /* The length field should be set to the size of a breakpoint
9642 instruction, even though we aren't inserting one ourselves. */
9644 gdbarch_remote_breakpoint_from_pc (gdbarch
, &addr
, &bpsize
);
9646 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
9649 /* Make sure the remote is pointing at the right process, if
9651 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9652 set_general_process ();
9654 rs
= get_remote_state ();
9656 endbuf
= rs
->buf
+ get_remote_packet_size ();
9662 addr
= remote_address_masked (addr
);
9663 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9664 xsnprintf (p
, endbuf
- p
, ",%x", bpsize
);
9666 if (remote_supports_cond_breakpoints (self
))
9667 remote_add_target_side_condition (gdbarch
, bp_tgt
, p
, endbuf
);
9669 if (remote_can_run_breakpoint_commands (self
))
9670 remote_add_target_side_commands (gdbarch
, bp_tgt
, p
);
9673 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9675 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
9678 if (rs
->buf
[1] == '.')
9680 message
= strchr (rs
->buf
+ 2, '.');
9682 error (_("Remote failure reply: %s"), message
+ 1);
9685 case PACKET_UNKNOWN
:
9688 bp_tgt
->placed_address
= addr
;
9689 bp_tgt
->placed_size
= bpsize
;
9692 internal_error (__FILE__
, __LINE__
,
9693 _("remote_insert_hw_breakpoint: reached end of function"));
9698 remote_remove_hw_breakpoint (struct target_ops
*self
, struct gdbarch
*gdbarch
,
9699 struct bp_target_info
*bp_tgt
)
9702 struct remote_state
*rs
= get_remote_state ();
9704 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
9706 if (packet_support (PACKET_Z1
) == PACKET_DISABLE
)
9709 /* Make sure the remote is pointing at the right process, if
9711 if (!gdbarch_has_global_breakpoints (target_gdbarch ()))
9712 set_general_process ();
9718 addr
= remote_address_masked (bp_tgt
->placed_address
);
9719 p
+= hexnumstr (p
, (ULONGEST
) addr
);
9720 xsnprintf (p
, endbuf
- p
, ",%x", bp_tgt
->placed_size
);
9723 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9725 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[PACKET_Z1
]))
9728 case PACKET_UNKNOWN
:
9733 internal_error (__FILE__
, __LINE__
,
9734 _("remote_remove_hw_breakpoint: reached end of function"));
9737 /* Verify memory using the "qCRC:" request. */
9740 remote_verify_memory (struct target_ops
*ops
,
9741 const gdb_byte
*data
, CORE_ADDR lma
, ULONGEST size
)
9743 struct remote_state
*rs
= get_remote_state ();
9744 unsigned long host_crc
, target_crc
;
9747 /* It doesn't make sense to use qCRC if the remote target is
9748 connected but not running. */
9749 if (target_has_execution
&& packet_support (PACKET_qCRC
) != PACKET_DISABLE
)
9751 enum packet_result result
;
9753 /* Make sure the remote is pointing at the right process. */
9754 set_general_process ();
9756 /* FIXME: assumes lma can fit into long. */
9757 xsnprintf (rs
->buf
, get_remote_packet_size (), "qCRC:%lx,%lx",
9758 (long) lma
, (long) size
);
9761 /* Be clever; compute the host_crc before waiting for target
9763 host_crc
= xcrc32 (data
, size
, 0xffffffff);
9765 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
9767 result
= packet_ok (rs
->buf
,
9768 &remote_protocol_packets
[PACKET_qCRC
]);
9769 if (result
== PACKET_ERROR
)
9771 else if (result
== PACKET_OK
)
9773 for (target_crc
= 0, tmp
= &rs
->buf
[1]; *tmp
; tmp
++)
9774 target_crc
= target_crc
* 16 + fromhex (*tmp
);
9776 return (host_crc
== target_crc
);
9780 return simple_verify_memory (ops
, data
, lma
, size
);
9783 /* compare-sections command
9785 With no arguments, compares each loadable section in the exec bfd
9786 with the same memory range on the target, and reports mismatches.
9787 Useful for verifying the image on the target against the exec file. */
9790 compare_sections_command (char *args
, int from_tty
)
9793 struct cleanup
*old_chain
;
9795 const char *sectname
;
9804 error (_("command cannot be used without an exec file"));
9806 /* Make sure the remote is pointing at the right process. */
9807 set_general_process ();
9809 if (args
!= NULL
&& strcmp (args
, "-r") == 0)
9815 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
9817 if (!(s
->flags
& SEC_LOAD
))
9818 continue; /* Skip non-loadable section. */
9820 if (read_only
&& (s
->flags
& SEC_READONLY
) == 0)
9821 continue; /* Skip writeable sections */
9823 size
= bfd_get_section_size (s
);
9825 continue; /* Skip zero-length section. */
9827 sectname
= bfd_get_section_name (exec_bfd
, s
);
9828 if (args
&& strcmp (args
, sectname
) != 0)
9829 continue; /* Not the section selected by user. */
9831 matched
= 1; /* Do this section. */
9834 sectdata
= (gdb_byte
*) xmalloc (size
);
9835 old_chain
= make_cleanup (xfree
, sectdata
);
9836 bfd_get_section_contents (exec_bfd
, s
, sectdata
, 0, size
);
9838 res
= target_verify_memory (sectdata
, lma
, size
);
9841 error (_("target memory fault, section %s, range %s -- %s"), sectname
,
9842 paddress (target_gdbarch (), lma
),
9843 paddress (target_gdbarch (), lma
+ size
));
9845 printf_filtered ("Section %s, range %s -- %s: ", sectname
,
9846 paddress (target_gdbarch (), lma
),
9847 paddress (target_gdbarch (), lma
+ size
));
9849 printf_filtered ("matched.\n");
9852 printf_filtered ("MIS-MATCHED!\n");
9856 do_cleanups (old_chain
);
9859 warning (_("One or more sections of the target image does not match\n\
9860 the loaded file\n"));
9861 if (args
&& !matched
)
9862 printf_filtered (_("No loaded section named '%s'.\n"), args
);
9865 /* Write LEN bytes from WRITEBUF into OBJECT_NAME/ANNEX at OFFSET
9866 into remote target. The number of bytes written to the remote
9867 target is returned, or -1 for error. */
9869 static enum target_xfer_status
9870 remote_write_qxfer (struct target_ops
*ops
, const char *object_name
,
9871 const char *annex
, const gdb_byte
*writebuf
,
9872 ULONGEST offset
, LONGEST len
, ULONGEST
*xfered_len
,
9873 struct packet_config
*packet
)
9877 struct remote_state
*rs
= get_remote_state ();
9878 int max_size
= get_memory_write_packet_size ();
9880 if (packet
->support
== PACKET_DISABLE
)
9881 return TARGET_XFER_E_IO
;
9883 /* Insert header. */
9884 i
= snprintf (rs
->buf
, max_size
,
9885 "qXfer:%s:write:%s:%s:",
9886 object_name
, annex
? annex
: "",
9887 phex_nz (offset
, sizeof offset
));
9888 max_size
-= (i
+ 1);
9890 /* Escape as much data as fits into rs->buf. */
9891 buf_len
= remote_escape_output
9892 (writebuf
, len
, 1, (gdb_byte
*) rs
->buf
+ i
, &max_size
, max_size
);
9894 if (putpkt_binary (rs
->buf
, i
+ buf_len
) < 0
9895 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
9896 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
9897 return TARGET_XFER_E_IO
;
9899 unpack_varlen_hex (rs
->buf
, &n
);
9902 return TARGET_XFER_OK
;
9905 /* Read OBJECT_NAME/ANNEX from the remote target using a qXfer packet.
9906 Data at OFFSET, of up to LEN bytes, is read into READBUF; the
9907 number of bytes read is returned, or 0 for EOF, or -1 for error.
9908 The number of bytes read may be less than LEN without indicating an
9909 EOF. PACKET is checked and updated to indicate whether the remote
9910 target supports this object. */
9912 static enum target_xfer_status
9913 remote_read_qxfer (struct target_ops
*ops
, const char *object_name
,
9915 gdb_byte
*readbuf
, ULONGEST offset
, LONGEST len
,
9916 ULONGEST
*xfered_len
,
9917 struct packet_config
*packet
)
9919 struct remote_state
*rs
= get_remote_state ();
9920 LONGEST i
, n
, packet_len
;
9922 if (packet
->support
== PACKET_DISABLE
)
9923 return TARGET_XFER_E_IO
;
9925 /* Check whether we've cached an end-of-object packet that matches
9927 if (rs
->finished_object
)
9929 if (strcmp (object_name
, rs
->finished_object
) == 0
9930 && strcmp (annex
? annex
: "", rs
->finished_annex
) == 0
9931 && offset
== rs
->finished_offset
)
9932 return TARGET_XFER_EOF
;
9935 /* Otherwise, we're now reading something different. Discard
9937 xfree (rs
->finished_object
);
9938 xfree (rs
->finished_annex
);
9939 rs
->finished_object
= NULL
;
9940 rs
->finished_annex
= NULL
;
9943 /* Request only enough to fit in a single packet. The actual data
9944 may not, since we don't know how much of it will need to be escaped;
9945 the target is free to respond with slightly less data. We subtract
9946 five to account for the response type and the protocol frame. */
9947 n
= min (get_remote_packet_size () - 5, len
);
9948 snprintf (rs
->buf
, get_remote_packet_size () - 4, "qXfer:%s:read:%s:%s,%s",
9949 object_name
, annex
? annex
: "",
9950 phex_nz (offset
, sizeof offset
),
9951 phex_nz (n
, sizeof n
));
9952 i
= putpkt (rs
->buf
);
9954 return TARGET_XFER_E_IO
;
9957 packet_len
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
9958 if (packet_len
< 0 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
9959 return TARGET_XFER_E_IO
;
9961 if (rs
->buf
[0] != 'l' && rs
->buf
[0] != 'm')
9962 error (_("Unknown remote qXfer reply: %s"), rs
->buf
);
9964 /* 'm' means there is (or at least might be) more data after this
9965 batch. That does not make sense unless there's at least one byte
9966 of data in this reply. */
9967 if (rs
->buf
[0] == 'm' && packet_len
== 1)
9968 error (_("Remote qXfer reply contained no data."));
9970 /* Got some data. */
9971 i
= remote_unescape_input ((gdb_byte
*) rs
->buf
+ 1,
9972 packet_len
- 1, readbuf
, n
);
9974 /* 'l' is an EOF marker, possibly including a final block of data,
9975 or possibly empty. If we have the final block of a non-empty
9976 object, record this fact to bypass a subsequent partial read. */
9977 if (rs
->buf
[0] == 'l' && offset
+ i
> 0)
9979 rs
->finished_object
= xstrdup (object_name
);
9980 rs
->finished_annex
= xstrdup (annex
? annex
: "");
9981 rs
->finished_offset
= offset
+ i
;
9985 return TARGET_XFER_EOF
;
9989 return TARGET_XFER_OK
;
9993 static enum target_xfer_status
9994 remote_xfer_partial (struct target_ops
*ops
, enum target_object object
,
9995 const char *annex
, gdb_byte
*readbuf
,
9996 const gdb_byte
*writebuf
, ULONGEST offset
, ULONGEST len
,
9997 ULONGEST
*xfered_len
)
9999 struct remote_state
*rs
;
10003 int unit_size
= gdbarch_addressable_memory_unit_size (target_gdbarch ());
10005 set_remote_traceframe ();
10006 set_general_thread (inferior_ptid
);
10008 rs
= get_remote_state ();
10010 /* Handle memory using the standard memory routines. */
10011 if (object
== TARGET_OBJECT_MEMORY
)
10013 /* If the remote target is connected but not running, we should
10014 pass this request down to a lower stratum (e.g. the executable
10016 if (!target_has_execution
)
10017 return TARGET_XFER_EOF
;
10019 if (writebuf
!= NULL
)
10020 return remote_write_bytes (offset
, writebuf
, len
, unit_size
,
10023 return remote_read_bytes (ops
, offset
, readbuf
, len
, unit_size
,
10027 /* Handle SPU memory using qxfer packets. */
10028 if (object
== TARGET_OBJECT_SPU
)
10031 return remote_read_qxfer (ops
, "spu", annex
, readbuf
, offset
, len
,
10032 xfered_len
, &remote_protocol_packets
10033 [PACKET_qXfer_spu_read
]);
10035 return remote_write_qxfer (ops
, "spu", annex
, writebuf
, offset
, len
,
10036 xfered_len
, &remote_protocol_packets
10037 [PACKET_qXfer_spu_write
]);
10040 /* Handle extra signal info using qxfer packets. */
10041 if (object
== TARGET_OBJECT_SIGNAL_INFO
)
10044 return remote_read_qxfer (ops
, "siginfo", annex
, readbuf
, offset
, len
,
10045 xfered_len
, &remote_protocol_packets
10046 [PACKET_qXfer_siginfo_read
]);
10048 return remote_write_qxfer (ops
, "siginfo", annex
,
10049 writebuf
, offset
, len
, xfered_len
,
10050 &remote_protocol_packets
10051 [PACKET_qXfer_siginfo_write
]);
10054 if (object
== TARGET_OBJECT_STATIC_TRACE_DATA
)
10057 return remote_read_qxfer (ops
, "statictrace", annex
,
10058 readbuf
, offset
, len
, xfered_len
,
10059 &remote_protocol_packets
10060 [PACKET_qXfer_statictrace_read
]);
10062 return TARGET_XFER_E_IO
;
10065 /* Only handle flash writes. */
10066 if (writebuf
!= NULL
)
10070 case TARGET_OBJECT_FLASH
:
10071 return remote_flash_write (ops
, offset
, len
, xfered_len
,
10075 return TARGET_XFER_E_IO
;
10079 /* Map pre-existing objects onto letters. DO NOT do this for new
10080 objects!!! Instead specify new query packets. */
10083 case TARGET_OBJECT_AVR
:
10087 case TARGET_OBJECT_AUXV
:
10088 gdb_assert (annex
== NULL
);
10089 return remote_read_qxfer (ops
, "auxv", annex
, readbuf
, offset
, len
,
10091 &remote_protocol_packets
[PACKET_qXfer_auxv
]);
10093 case TARGET_OBJECT_AVAILABLE_FEATURES
:
10094 return remote_read_qxfer
10095 (ops
, "features", annex
, readbuf
, offset
, len
, xfered_len
,
10096 &remote_protocol_packets
[PACKET_qXfer_features
]);
10098 case TARGET_OBJECT_LIBRARIES
:
10099 return remote_read_qxfer
10100 (ops
, "libraries", annex
, readbuf
, offset
, len
, xfered_len
,
10101 &remote_protocol_packets
[PACKET_qXfer_libraries
]);
10103 case TARGET_OBJECT_LIBRARIES_SVR4
:
10104 return remote_read_qxfer
10105 (ops
, "libraries-svr4", annex
, readbuf
, offset
, len
, xfered_len
,
10106 &remote_protocol_packets
[PACKET_qXfer_libraries_svr4
]);
10108 case TARGET_OBJECT_MEMORY_MAP
:
10109 gdb_assert (annex
== NULL
);
10110 return remote_read_qxfer (ops
, "memory-map", annex
, readbuf
, offset
, len
,
10112 &remote_protocol_packets
[PACKET_qXfer_memory_map
]);
10114 case TARGET_OBJECT_OSDATA
:
10115 /* Should only get here if we're connected. */
10116 gdb_assert (rs
->remote_desc
);
10117 return remote_read_qxfer
10118 (ops
, "osdata", annex
, readbuf
, offset
, len
, xfered_len
,
10119 &remote_protocol_packets
[PACKET_qXfer_osdata
]);
10121 case TARGET_OBJECT_THREADS
:
10122 gdb_assert (annex
== NULL
);
10123 return remote_read_qxfer (ops
, "threads", annex
, readbuf
, offset
, len
,
10125 &remote_protocol_packets
[PACKET_qXfer_threads
]);
10127 case TARGET_OBJECT_TRACEFRAME_INFO
:
10128 gdb_assert (annex
== NULL
);
10129 return remote_read_qxfer
10130 (ops
, "traceframe-info", annex
, readbuf
, offset
, len
, xfered_len
,
10131 &remote_protocol_packets
[PACKET_qXfer_traceframe_info
]);
10133 case TARGET_OBJECT_FDPIC
:
10134 return remote_read_qxfer (ops
, "fdpic", annex
, readbuf
, offset
, len
,
10136 &remote_protocol_packets
[PACKET_qXfer_fdpic
]);
10138 case TARGET_OBJECT_OPENVMS_UIB
:
10139 return remote_read_qxfer (ops
, "uib", annex
, readbuf
, offset
, len
,
10141 &remote_protocol_packets
[PACKET_qXfer_uib
]);
10143 case TARGET_OBJECT_BTRACE
:
10144 return remote_read_qxfer (ops
, "btrace", annex
, readbuf
, offset
, len
,
10146 &remote_protocol_packets
[PACKET_qXfer_btrace
]);
10148 case TARGET_OBJECT_BTRACE_CONF
:
10149 return remote_read_qxfer (ops
, "btrace-conf", annex
, readbuf
, offset
,
10151 &remote_protocol_packets
[PACKET_qXfer_btrace_conf
]);
10153 case TARGET_OBJECT_EXEC_FILE
:
10154 return remote_read_qxfer (ops
, "exec-file", annex
, readbuf
, offset
,
10156 &remote_protocol_packets
[PACKET_qXfer_exec_file
]);
10159 return TARGET_XFER_E_IO
;
10162 /* Minimum outbuf size is get_remote_packet_size (). If LEN is not
10163 large enough let the caller deal with it. */
10164 if (len
< get_remote_packet_size ())
10165 return TARGET_XFER_E_IO
;
10166 len
= get_remote_packet_size ();
10168 /* Except for querying the minimum buffer size, target must be open. */
10169 if (!rs
->remote_desc
)
10170 error (_("remote query is only available after target open"));
10172 gdb_assert (annex
!= NULL
);
10173 gdb_assert (readbuf
!= NULL
);
10177 *p2
++ = query_type
;
10179 /* We used one buffer char for the remote protocol q command and
10180 another for the query type. As the remote protocol encapsulation
10181 uses 4 chars plus one extra in case we are debugging
10182 (remote_debug), we have PBUFZIZ - 7 left to pack the query
10185 while (annex
[i
] && (i
< (get_remote_packet_size () - 8)))
10187 /* Bad caller may have sent forbidden characters. */
10188 gdb_assert (isprint (annex
[i
]) && annex
[i
] != '$' && annex
[i
] != '#');
10193 gdb_assert (annex
[i
] == '\0');
10195 i
= putpkt (rs
->buf
);
10197 return TARGET_XFER_E_IO
;
10199 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10200 strcpy ((char *) readbuf
, rs
->buf
);
10202 *xfered_len
= strlen ((char *) readbuf
);
10203 return TARGET_XFER_OK
;
10207 remote_search_memory (struct target_ops
* ops
,
10208 CORE_ADDR start_addr
, ULONGEST search_space_len
,
10209 const gdb_byte
*pattern
, ULONGEST pattern_len
,
10210 CORE_ADDR
*found_addrp
)
10212 int addr_size
= gdbarch_addr_bit (target_gdbarch ()) / 8;
10213 struct remote_state
*rs
= get_remote_state ();
10214 int max_size
= get_memory_write_packet_size ();
10215 struct packet_config
*packet
=
10216 &remote_protocol_packets
[PACKET_qSearch_memory
];
10217 /* Number of packet bytes used to encode the pattern;
10218 this could be more than PATTERN_LEN due to escape characters. */
10219 int escaped_pattern_len
;
10220 /* Amount of pattern that was encodable in the packet. */
10221 int used_pattern_len
;
10224 ULONGEST found_addr
;
10226 /* Don't go to the target if we don't have to.
10227 This is done before checking packet->support to avoid the possibility that
10228 a success for this edge case means the facility works in general. */
10229 if (pattern_len
> search_space_len
)
10231 if (pattern_len
== 0)
10233 *found_addrp
= start_addr
;
10237 /* If we already know the packet isn't supported, fall back to the simple
10238 way of searching memory. */
10240 if (packet_config_support (packet
) == PACKET_DISABLE
)
10242 /* Target doesn't provided special support, fall back and use the
10243 standard support (copy memory and do the search here). */
10244 return simple_search_memory (ops
, start_addr
, search_space_len
,
10245 pattern
, pattern_len
, found_addrp
);
10248 /* Make sure the remote is pointing at the right process. */
10249 set_general_process ();
10251 /* Insert header. */
10252 i
= snprintf (rs
->buf
, max_size
,
10253 "qSearch:memory:%s;%s;",
10254 phex_nz (start_addr
, addr_size
),
10255 phex_nz (search_space_len
, sizeof (search_space_len
)));
10256 max_size
-= (i
+ 1);
10258 /* Escape as much data as fits into rs->buf. */
10259 escaped_pattern_len
=
10260 remote_escape_output (pattern
, pattern_len
, 1, (gdb_byte
*) rs
->buf
+ i
,
10261 &used_pattern_len
, max_size
);
10263 /* Bail if the pattern is too large. */
10264 if (used_pattern_len
!= pattern_len
)
10265 error (_("Pattern is too large to transmit to remote target."));
10267 if (putpkt_binary (rs
->buf
, i
+ escaped_pattern_len
) < 0
10268 || getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) < 0
10269 || packet_ok (rs
->buf
, packet
) != PACKET_OK
)
10271 /* The request may not have worked because the command is not
10272 supported. If so, fall back to the simple way. */
10273 if (packet
->support
== PACKET_DISABLE
)
10275 return simple_search_memory (ops
, start_addr
, search_space_len
,
10276 pattern
, pattern_len
, found_addrp
);
10281 if (rs
->buf
[0] == '0')
10283 else if (rs
->buf
[0] == '1')
10286 if (rs
->buf
[1] != ',')
10287 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10288 unpack_varlen_hex (rs
->buf
+ 2, &found_addr
);
10289 *found_addrp
= found_addr
;
10292 error (_("Unknown qSearch:memory reply: %s"), rs
->buf
);
10298 remote_rcmd (struct target_ops
*self
, const char *command
,
10299 struct ui_file
*outbuf
)
10301 struct remote_state
*rs
= get_remote_state ();
10304 if (!rs
->remote_desc
)
10305 error (_("remote rcmd is only available after target open"));
10307 /* Send a NULL command across as an empty command. */
10308 if (command
== NULL
)
10311 /* The query prefix. */
10312 strcpy (rs
->buf
, "qRcmd,");
10313 p
= strchr (rs
->buf
, '\0');
10315 if ((strlen (rs
->buf
) + strlen (command
) * 2 + 8/*misc*/)
10316 > get_remote_packet_size ())
10317 error (_("\"monitor\" command ``%s'' is too long."), command
);
10319 /* Encode the actual command. */
10320 bin2hex ((const gdb_byte
*) command
, p
, strlen (command
));
10322 if (putpkt (rs
->buf
) < 0)
10323 error (_("Communication problem with target."));
10325 /* get/display the response */
10330 /* XXX - see also remote_get_noisy_reply(). */
10331 QUIT
; /* Allow user to bail out with ^C. */
10333 if (getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0) == -1)
10335 /* Timeout. Continue to (try to) read responses.
10336 This is better than stopping with an error, assuming the stub
10337 is still executing the (long) monitor command.
10338 If needed, the user can interrupt gdb using C-c, obtaining
10339 an effect similar to stop on timeout. */
10343 if (buf
[0] == '\0')
10344 error (_("Target does not support this command."));
10345 if (buf
[0] == 'O' && buf
[1] != 'K')
10347 remote_console_output (buf
+ 1); /* 'O' message from stub. */
10350 if (strcmp (buf
, "OK") == 0)
10352 if (strlen (buf
) == 3 && buf
[0] == 'E'
10353 && isdigit (buf
[1]) && isdigit (buf
[2]))
10355 error (_("Protocol error with Rcmd"));
10357 for (p
= buf
; p
[0] != '\0' && p
[1] != '\0'; p
+= 2)
10359 char c
= (fromhex (p
[0]) << 4) + fromhex (p
[1]);
10361 fputc_unfiltered (c
, outbuf
);
10367 static VEC(mem_region_s
) *
10368 remote_memory_map (struct target_ops
*ops
)
10370 VEC(mem_region_s
) *result
= NULL
;
10371 char *text
= target_read_stralloc (¤t_target
,
10372 TARGET_OBJECT_MEMORY_MAP
, NULL
);
10376 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
10378 result
= parse_memory_map (text
);
10379 do_cleanups (back_to
);
10386 packet_command (char *args
, int from_tty
)
10388 struct remote_state
*rs
= get_remote_state ();
10390 if (!rs
->remote_desc
)
10391 error (_("command can only be used with remote target"));
10394 error (_("remote-packet command requires packet text as argument"));
10396 puts_filtered ("sending: ");
10397 print_packet (args
);
10398 puts_filtered ("\n");
10401 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10402 puts_filtered ("received: ");
10403 print_packet (rs
->buf
);
10404 puts_filtered ("\n");
10408 /* --------- UNIT_TEST for THREAD oriented PACKETS ------------------- */
10410 static void display_thread_info (struct gdb_ext_thread_info
*info
);
10412 static void threadset_test_cmd (char *cmd
, int tty
);
10414 static void threadalive_test (char *cmd
, int tty
);
10416 static void threadlist_test_cmd (char *cmd
, int tty
);
10418 int get_and_display_threadinfo (threadref
*ref
);
10420 static void threadinfo_test_cmd (char *cmd
, int tty
);
10422 static int thread_display_step (threadref
*ref
, void *context
);
10424 static void threadlist_update_test_cmd (char *cmd
, int tty
);
10426 static void init_remote_threadtests (void);
10428 #define SAMPLE_THREAD 0x05060708 /* Truncated 64 bit threadid. */
10431 threadset_test_cmd (char *cmd
, int tty
)
10433 int sample_thread
= SAMPLE_THREAD
;
10435 printf_filtered (_("Remote threadset test\n"));
10436 set_general_thread (sample_thread
);
10441 threadalive_test (char *cmd
, int tty
)
10443 int sample_thread
= SAMPLE_THREAD
;
10444 int pid
= ptid_get_pid (inferior_ptid
);
10445 ptid_t ptid
= ptid_build (pid
, sample_thread
, 0);
10447 if (remote_thread_alive (ptid
))
10448 printf_filtered ("PASS: Thread alive test\n");
10450 printf_filtered ("FAIL: Thread alive test\n");
10453 void output_threadid (char *title
, threadref
*ref
);
10456 output_threadid (char *title
, threadref
*ref
)
10460 pack_threadid (&hexid
[0], ref
); /* Convert threead id into hex. */
10462 printf_filtered ("%s %s\n", title
, (&hexid
[0]));
10466 threadlist_test_cmd (char *cmd
, int tty
)
10469 threadref nextthread
;
10470 int done
, result_count
;
10471 threadref threadlist
[3];
10473 printf_filtered ("Remote Threadlist test\n");
10474 if (!remote_get_threadlist (startflag
, &nextthread
, 3, &done
,
10475 &result_count
, &threadlist
[0]))
10476 printf_filtered ("FAIL: threadlist test\n");
10479 threadref
*scan
= threadlist
;
10480 threadref
*limit
= scan
+ result_count
;
10482 while (scan
< limit
)
10483 output_threadid (" thread ", scan
++);
10488 display_thread_info (struct gdb_ext_thread_info
*info
)
10490 output_threadid ("Threadid: ", &info
->threadid
);
10491 printf_filtered ("Name: %s\n ", info
->shortname
);
10492 printf_filtered ("State: %s\n", info
->display
);
10493 printf_filtered ("other: %s\n\n", info
->more_display
);
10497 get_and_display_threadinfo (threadref
*ref
)
10501 struct gdb_ext_thread_info threadinfo
;
10503 set
= TAG_THREADID
| TAG_EXISTS
| TAG_THREADNAME
10504 | TAG_MOREDISPLAY
| TAG_DISPLAY
;
10505 if (0 != (result
= remote_get_threadinfo (ref
, set
, &threadinfo
)))
10506 display_thread_info (&threadinfo
);
10511 threadinfo_test_cmd (char *cmd
, int tty
)
10513 int athread
= SAMPLE_THREAD
;
10517 int_to_threadref (&thread
, athread
);
10518 printf_filtered ("Remote Threadinfo test\n");
10519 if (!get_and_display_threadinfo (&thread
))
10520 printf_filtered ("FAIL cannot get thread info\n");
10524 thread_display_step (threadref
*ref
, void *context
)
10526 /* output_threadid(" threadstep ",ref); *//* simple test */
10527 return get_and_display_threadinfo (ref
);
10531 threadlist_update_test_cmd (char *cmd
, int tty
)
10533 printf_filtered ("Remote Threadlist update test\n");
10534 remote_threadlist_iterator (thread_display_step
, 0, CRAZY_MAX_THREADS
);
10538 init_remote_threadtests (void)
10540 add_com ("tlist", class_obscure
, threadlist_test_cmd
,
10541 _("Fetch and print the remote list of "
10542 "thread identifiers, one pkt only"));
10543 add_com ("tinfo", class_obscure
, threadinfo_test_cmd
,
10544 _("Fetch and display info about one thread"));
10545 add_com ("tset", class_obscure
, threadset_test_cmd
,
10546 _("Test setting to a different thread"));
10547 add_com ("tupd", class_obscure
, threadlist_update_test_cmd
,
10548 _("Iterate through updating all remote thread info"));
10549 add_com ("talive", class_obscure
, threadalive_test
,
10550 _(" Remote thread alive test "));
10555 /* Convert a thread ID to a string. Returns the string in a static
10559 remote_pid_to_str (struct target_ops
*ops
, ptid_t ptid
)
10561 static char buf
[64];
10562 struct remote_state
*rs
= get_remote_state ();
10564 if (ptid_equal (ptid
, null_ptid
))
10565 return normal_pid_to_str (ptid
);
10566 else if (ptid_is_pid (ptid
))
10568 /* Printing an inferior target id. */
10570 /* When multi-process extensions are off, there's no way in the
10571 remote protocol to know the remote process id, if there's any
10572 at all. There's one exception --- when we're connected with
10573 target extended-remote, and we manually attached to a process
10574 with "attach PID". We don't record anywhere a flag that
10575 allows us to distinguish that case from the case of
10576 connecting with extended-remote and the stub already being
10577 attached to a process, and reporting yes to qAttached, hence
10578 no smart special casing here. */
10579 if (!remote_multi_process_p (rs
))
10581 xsnprintf (buf
, sizeof buf
, "Remote target");
10585 return normal_pid_to_str (ptid
);
10589 if (ptid_equal (magic_null_ptid
, ptid
))
10590 xsnprintf (buf
, sizeof buf
, "Thread <main>");
10591 else if (remote_multi_process_p (rs
))
10592 if (ptid_get_lwp (ptid
) == 0)
10593 return normal_pid_to_str (ptid
);
10595 xsnprintf (buf
, sizeof buf
, "Thread %d.%ld",
10596 ptid_get_pid (ptid
), ptid_get_lwp (ptid
));
10598 xsnprintf (buf
, sizeof buf
, "Thread %ld",
10599 ptid_get_lwp (ptid
));
10604 /* Get the address of the thread local variable in OBJFILE which is
10605 stored at OFFSET within the thread local storage for thread PTID. */
10608 remote_get_thread_local_address (struct target_ops
*ops
,
10609 ptid_t ptid
, CORE_ADDR lm
, CORE_ADDR offset
)
10611 if (packet_support (PACKET_qGetTLSAddr
) != PACKET_DISABLE
)
10613 struct remote_state
*rs
= get_remote_state ();
10615 char *endp
= rs
->buf
+ get_remote_packet_size ();
10616 enum packet_result result
;
10618 strcpy (p
, "qGetTLSAddr:");
10620 p
= write_ptid (p
, endp
, ptid
);
10622 p
+= hexnumstr (p
, offset
);
10624 p
+= hexnumstr (p
, lm
);
10628 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10629 result
= packet_ok (rs
->buf
,
10630 &remote_protocol_packets
[PACKET_qGetTLSAddr
]);
10631 if (result
== PACKET_OK
)
10635 unpack_varlen_hex (rs
->buf
, &result
);
10638 else if (result
== PACKET_UNKNOWN
)
10639 throw_error (TLS_GENERIC_ERROR
,
10640 _("Remote target doesn't support qGetTLSAddr packet"));
10642 throw_error (TLS_GENERIC_ERROR
,
10643 _("Remote target failed to process qGetTLSAddr request"));
10646 throw_error (TLS_GENERIC_ERROR
,
10647 _("TLS not supported or disabled on this target"));
10652 /* Provide thread local base, i.e. Thread Information Block address.
10653 Returns 1 if ptid is found and thread_local_base is non zero. */
10656 remote_get_tib_address (struct target_ops
*self
, ptid_t ptid
, CORE_ADDR
*addr
)
10658 if (packet_support (PACKET_qGetTIBAddr
) != PACKET_DISABLE
)
10660 struct remote_state
*rs
= get_remote_state ();
10662 char *endp
= rs
->buf
+ get_remote_packet_size ();
10663 enum packet_result result
;
10665 strcpy (p
, "qGetTIBAddr:");
10667 p
= write_ptid (p
, endp
, ptid
);
10671 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
10672 result
= packet_ok (rs
->buf
,
10673 &remote_protocol_packets
[PACKET_qGetTIBAddr
]);
10674 if (result
== PACKET_OK
)
10678 unpack_varlen_hex (rs
->buf
, &result
);
10680 *addr
= (CORE_ADDR
) result
;
10683 else if (result
== PACKET_UNKNOWN
)
10684 error (_("Remote target doesn't support qGetTIBAddr packet"));
10686 error (_("Remote target failed to process qGetTIBAddr request"));
10689 error (_("qGetTIBAddr not supported or disabled on this target"));
10694 /* Support for inferring a target description based on the current
10695 architecture and the size of a 'g' packet. While the 'g' packet
10696 can have any size (since optional registers can be left off the
10697 end), some sizes are easily recognizable given knowledge of the
10698 approximate architecture. */
10700 struct remote_g_packet_guess
10703 const struct target_desc
*tdesc
;
10705 typedef struct remote_g_packet_guess remote_g_packet_guess_s
;
10706 DEF_VEC_O(remote_g_packet_guess_s
);
10708 struct remote_g_packet_data
10710 VEC(remote_g_packet_guess_s
) *guesses
;
10713 static struct gdbarch_data
*remote_g_packet_data_handle
;
10716 remote_g_packet_data_init (struct obstack
*obstack
)
10718 return OBSTACK_ZALLOC (obstack
, struct remote_g_packet_data
);
10722 register_remote_g_packet_guess (struct gdbarch
*gdbarch
, int bytes
,
10723 const struct target_desc
*tdesc
)
10725 struct remote_g_packet_data
*data
10726 = ((struct remote_g_packet_data
*)
10727 gdbarch_data (gdbarch
, remote_g_packet_data_handle
));
10728 struct remote_g_packet_guess new_guess
, *guess
;
10731 gdb_assert (tdesc
!= NULL
);
10734 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
10736 if (guess
->bytes
== bytes
)
10737 internal_error (__FILE__
, __LINE__
,
10738 _("Duplicate g packet description added for size %d"),
10741 new_guess
.bytes
= bytes
;
10742 new_guess
.tdesc
= tdesc
;
10743 VEC_safe_push (remote_g_packet_guess_s
, data
->guesses
, &new_guess
);
10746 /* Return 1 if remote_read_description would do anything on this target
10747 and architecture, 0 otherwise. */
10750 remote_read_description_p (struct target_ops
*target
)
10752 struct remote_g_packet_data
*data
10753 = ((struct remote_g_packet_data
*)
10754 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
10756 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
10762 static const struct target_desc
*
10763 remote_read_description (struct target_ops
*target
)
10765 struct remote_g_packet_data
*data
10766 = ((struct remote_g_packet_data
*)
10767 gdbarch_data (target_gdbarch (), remote_g_packet_data_handle
));
10769 /* Do not try this during initial connection, when we do not know
10770 whether there is a running but stopped thread. */
10771 if (!target_has_execution
|| ptid_equal (inferior_ptid
, null_ptid
))
10772 return target
->beneath
->to_read_description (target
->beneath
);
10774 if (!VEC_empty (remote_g_packet_guess_s
, data
->guesses
))
10776 struct remote_g_packet_guess
*guess
;
10778 int bytes
= send_g_packet ();
10781 VEC_iterate (remote_g_packet_guess_s
, data
->guesses
, ix
, guess
);
10783 if (guess
->bytes
== bytes
)
10784 return guess
->tdesc
;
10786 /* We discard the g packet. A minor optimization would be to
10787 hold on to it, and fill the register cache once we have selected
10788 an architecture, but it's too tricky to do safely. */
10791 return target
->beneath
->to_read_description (target
->beneath
);
10794 /* Remote file transfer support. This is host-initiated I/O, not
10795 target-initiated; for target-initiated, see remote-fileio.c. */
10797 /* If *LEFT is at least the length of STRING, copy STRING to
10798 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10799 decrease *LEFT. Otherwise raise an error. */
10802 remote_buffer_add_string (char **buffer
, int *left
, char *string
)
10804 int len
= strlen (string
);
10807 error (_("Packet too long for target."));
10809 memcpy (*buffer
, string
, len
);
10813 /* NUL-terminate the buffer as a convenience, if there is
10819 /* If *LEFT is large enough, hex encode LEN bytes from BYTES into
10820 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10821 decrease *LEFT. Otherwise raise an error. */
10824 remote_buffer_add_bytes (char **buffer
, int *left
, const gdb_byte
*bytes
,
10827 if (2 * len
> *left
)
10828 error (_("Packet too long for target."));
10830 bin2hex (bytes
, *buffer
, len
);
10831 *buffer
+= 2 * len
;
10834 /* NUL-terminate the buffer as a convenience, if there is
10840 /* If *LEFT is large enough, convert VALUE to hex and add it to
10841 *BUFFER, update *BUFFER to point to the new end of the buffer, and
10842 decrease *LEFT. Otherwise raise an error. */
10845 remote_buffer_add_int (char **buffer
, int *left
, ULONGEST value
)
10847 int len
= hexnumlen (value
);
10850 error (_("Packet too long for target."));
10852 hexnumstr (*buffer
, value
);
10856 /* NUL-terminate the buffer as a convenience, if there is
10862 /* Parse an I/O result packet from BUFFER. Set RETCODE to the return
10863 value, *REMOTE_ERRNO to the remote error number or zero if none
10864 was included, and *ATTACHMENT to point to the start of the annex
10865 if any. The length of the packet isn't needed here; there may
10866 be NUL bytes in BUFFER, but they will be after *ATTACHMENT.
10868 Return 0 if the packet could be parsed, -1 if it could not. If
10869 -1 is returned, the other variables may not be initialized. */
10872 remote_hostio_parse_result (char *buffer
, int *retcode
,
10873 int *remote_errno
, char **attachment
)
10878 *attachment
= NULL
;
10880 if (buffer
[0] != 'F')
10884 *retcode
= strtol (&buffer
[1], &p
, 16);
10885 if (errno
!= 0 || p
== &buffer
[1])
10888 /* Check for ",errno". */
10892 *remote_errno
= strtol (p
+ 1, &p2
, 16);
10893 if (errno
!= 0 || p
+ 1 == p2
)
10898 /* Check for ";attachment". If there is no attachment, the
10899 packet should end here. */
10902 *attachment
= p
+ 1;
10905 else if (*p
== '\0')
10911 /* Send a prepared I/O packet to the target and read its response.
10912 The prepared packet is in the global RS->BUF before this function
10913 is called, and the answer is there when we return.
10915 COMMAND_BYTES is the length of the request to send, which may include
10916 binary data. WHICH_PACKET is the packet configuration to check
10917 before attempting a packet. If an error occurs, *REMOTE_ERRNO
10918 is set to the error number and -1 is returned. Otherwise the value
10919 returned by the function is returned.
10921 ATTACHMENT and ATTACHMENT_LEN should be non-NULL if and only if an
10922 attachment is expected; an error will be reported if there's a
10923 mismatch. If one is found, *ATTACHMENT will be set to point into
10924 the packet buffer and *ATTACHMENT_LEN will be set to the
10925 attachment's length. */
10928 remote_hostio_send_command (int command_bytes
, int which_packet
,
10929 int *remote_errno
, char **attachment
,
10930 int *attachment_len
)
10932 struct remote_state
*rs
= get_remote_state ();
10933 int ret
, bytes_read
;
10934 char *attachment_tmp
;
10936 if (!rs
->remote_desc
10937 || packet_support (which_packet
) == PACKET_DISABLE
)
10939 *remote_errno
= FILEIO_ENOSYS
;
10943 putpkt_binary (rs
->buf
, command_bytes
);
10944 bytes_read
= getpkt_sane (&rs
->buf
, &rs
->buf_size
, 0);
10946 /* If it timed out, something is wrong. Don't try to parse the
10948 if (bytes_read
< 0)
10950 *remote_errno
= FILEIO_EINVAL
;
10954 switch (packet_ok (rs
->buf
, &remote_protocol_packets
[which_packet
]))
10957 *remote_errno
= FILEIO_EINVAL
;
10959 case PACKET_UNKNOWN
:
10960 *remote_errno
= FILEIO_ENOSYS
;
10966 if (remote_hostio_parse_result (rs
->buf
, &ret
, remote_errno
,
10969 *remote_errno
= FILEIO_EINVAL
;
10973 /* Make sure we saw an attachment if and only if we expected one. */
10974 if ((attachment_tmp
== NULL
&& attachment
!= NULL
)
10975 || (attachment_tmp
!= NULL
&& attachment
== NULL
))
10977 *remote_errno
= FILEIO_EINVAL
;
10981 /* If an attachment was found, it must point into the packet buffer;
10982 work out how many bytes there were. */
10983 if (attachment_tmp
!= NULL
)
10985 *attachment
= attachment_tmp
;
10986 *attachment_len
= bytes_read
- (*attachment
- rs
->buf
);
10992 /* Invalidate the readahead cache. */
10995 readahead_cache_invalidate (void)
10997 struct remote_state
*rs
= get_remote_state ();
10999 rs
->readahead_cache
.fd
= -1;
11002 /* Invalidate the readahead cache if it is holding data for FD. */
11005 readahead_cache_invalidate_fd (int fd
)
11007 struct remote_state
*rs
= get_remote_state ();
11009 if (rs
->readahead_cache
.fd
== fd
)
11010 rs
->readahead_cache
.fd
= -1;
11013 /* Set the filesystem remote_hostio functions that take FILENAME
11014 arguments will use. Return 0 on success, or -1 if an error
11015 occurs (and set *REMOTE_ERRNO). */
11018 remote_hostio_set_filesystem (struct inferior
*inf
, int *remote_errno
)
11020 struct remote_state
*rs
= get_remote_state ();
11021 int required_pid
= (inf
== NULL
|| inf
->fake_pid_p
) ? 0 : inf
->pid
;
11023 int left
= get_remote_packet_size () - 1;
11027 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11030 if (rs
->fs_pid
!= -1 && required_pid
== rs
->fs_pid
)
11033 remote_buffer_add_string (&p
, &left
, "vFile:setfs:");
11035 xsnprintf (arg
, sizeof (arg
), "%x", required_pid
);
11036 remote_buffer_add_string (&p
, &left
, arg
);
11038 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_setfs
,
11039 remote_errno
, NULL
, NULL
);
11041 if (packet_support (PACKET_vFile_setfs
) == PACKET_DISABLE
)
11045 rs
->fs_pid
= required_pid
;
11050 /* Implementation of to_fileio_open. */
11053 remote_hostio_open (struct target_ops
*self
,
11054 struct inferior
*inf
, const char *filename
,
11055 int flags
, int mode
, int warn_if_slow
,
11058 struct remote_state
*rs
= get_remote_state ();
11060 int left
= get_remote_packet_size () - 1;
11064 static int warning_issued
= 0;
11066 printf_unfiltered (_("Reading %s from remote target...\n"),
11069 if (!warning_issued
)
11071 warning (_("File transfers from remote targets can be slow."
11072 " Use \"set sysroot\" to access files locally"
11074 warning_issued
= 1;
11078 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11081 remote_buffer_add_string (&p
, &left
, "vFile:open:");
11083 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11084 strlen (filename
));
11085 remote_buffer_add_string (&p
, &left
, ",");
11087 remote_buffer_add_int (&p
, &left
, flags
);
11088 remote_buffer_add_string (&p
, &left
, ",");
11090 remote_buffer_add_int (&p
, &left
, mode
);
11092 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_open
,
11093 remote_errno
, NULL
, NULL
);
11096 /* Implementation of to_fileio_pwrite. */
11099 remote_hostio_pwrite (struct target_ops
*self
,
11100 int fd
, const gdb_byte
*write_buf
, int len
,
11101 ULONGEST offset
, int *remote_errno
)
11103 struct remote_state
*rs
= get_remote_state ();
11105 int left
= get_remote_packet_size ();
11108 readahead_cache_invalidate_fd (fd
);
11110 remote_buffer_add_string (&p
, &left
, "vFile:pwrite:");
11112 remote_buffer_add_int (&p
, &left
, fd
);
11113 remote_buffer_add_string (&p
, &left
, ",");
11115 remote_buffer_add_int (&p
, &left
, offset
);
11116 remote_buffer_add_string (&p
, &left
, ",");
11118 p
+= remote_escape_output (write_buf
, len
, 1, (gdb_byte
*) p
, &out_len
,
11119 get_remote_packet_size () - (p
- rs
->buf
));
11121 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pwrite
,
11122 remote_errno
, NULL
, NULL
);
11125 /* Helper for the implementation of to_fileio_pread. Read the file
11126 from the remote side with vFile:pread. */
11129 remote_hostio_pread_vFile (struct target_ops
*self
,
11130 int fd
, gdb_byte
*read_buf
, int len
,
11131 ULONGEST offset
, int *remote_errno
)
11133 struct remote_state
*rs
= get_remote_state ();
11136 int left
= get_remote_packet_size ();
11137 int ret
, attachment_len
;
11140 remote_buffer_add_string (&p
, &left
, "vFile:pread:");
11142 remote_buffer_add_int (&p
, &left
, fd
);
11143 remote_buffer_add_string (&p
, &left
, ",");
11145 remote_buffer_add_int (&p
, &left
, len
);
11146 remote_buffer_add_string (&p
, &left
, ",");
11148 remote_buffer_add_int (&p
, &left
, offset
);
11150 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_pread
,
11151 remote_errno
, &attachment
,
11157 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11159 if (read_len
!= ret
)
11160 error (_("Read returned %d, but %d bytes."), ret
, (int) read_len
);
11165 /* Serve pread from the readahead cache. Returns number of bytes
11166 read, or 0 if the request can't be served from the cache. */
11169 remote_hostio_pread_from_cache (struct remote_state
*rs
,
11170 int fd
, gdb_byte
*read_buf
, size_t len
,
11173 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11175 if (cache
->fd
== fd
11176 && cache
->offset
<= offset
11177 && offset
< cache
->offset
+ cache
->bufsize
)
11179 ULONGEST max
= cache
->offset
+ cache
->bufsize
;
11181 if (offset
+ len
> max
)
11182 len
= max
- offset
;
11184 memcpy (read_buf
, cache
->buf
+ offset
- cache
->offset
, len
);
11191 /* Implementation of to_fileio_pread. */
11194 remote_hostio_pread (struct target_ops
*self
,
11195 int fd
, gdb_byte
*read_buf
, int len
,
11196 ULONGEST offset
, int *remote_errno
)
11199 struct remote_state
*rs
= get_remote_state ();
11200 struct readahead_cache
*cache
= &rs
->readahead_cache
;
11202 ret
= remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11205 cache
->hit_count
++;
11208 fprintf_unfiltered (gdb_stdlog
, "readahead cache hit %s\n",
11209 pulongest (cache
->hit_count
));
11213 cache
->miss_count
++;
11215 fprintf_unfiltered (gdb_stdlog
, "readahead cache miss %s\n",
11216 pulongest (cache
->miss_count
));
11219 cache
->offset
= offset
;
11220 cache
->bufsize
= get_remote_packet_size ();
11221 cache
->buf
= (gdb_byte
*) xrealloc (cache
->buf
, cache
->bufsize
);
11223 ret
= remote_hostio_pread_vFile (self
, cache
->fd
, cache
->buf
, cache
->bufsize
,
11224 cache
->offset
, remote_errno
);
11227 readahead_cache_invalidate_fd (fd
);
11231 cache
->bufsize
= ret
;
11232 return remote_hostio_pread_from_cache (rs
, fd
, read_buf
, len
, offset
);
11235 /* Implementation of to_fileio_close. */
11238 remote_hostio_close (struct target_ops
*self
, int fd
, int *remote_errno
)
11240 struct remote_state
*rs
= get_remote_state ();
11242 int left
= get_remote_packet_size () - 1;
11244 readahead_cache_invalidate_fd (fd
);
11246 remote_buffer_add_string (&p
, &left
, "vFile:close:");
11248 remote_buffer_add_int (&p
, &left
, fd
);
11250 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_close
,
11251 remote_errno
, NULL
, NULL
);
11254 /* Implementation of to_fileio_unlink. */
11257 remote_hostio_unlink (struct target_ops
*self
,
11258 struct inferior
*inf
, const char *filename
,
11261 struct remote_state
*rs
= get_remote_state ();
11263 int left
= get_remote_packet_size () - 1;
11265 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11268 remote_buffer_add_string (&p
, &left
, "vFile:unlink:");
11270 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11271 strlen (filename
));
11273 return remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_unlink
,
11274 remote_errno
, NULL
, NULL
);
11277 /* Implementation of to_fileio_readlink. */
11280 remote_hostio_readlink (struct target_ops
*self
,
11281 struct inferior
*inf
, const char *filename
,
11284 struct remote_state
*rs
= get_remote_state ();
11287 int left
= get_remote_packet_size ();
11288 int len
, attachment_len
;
11292 if (remote_hostio_set_filesystem (inf
, remote_errno
) != 0)
11295 remote_buffer_add_string (&p
, &left
, "vFile:readlink:");
11297 remote_buffer_add_bytes (&p
, &left
, (const gdb_byte
*) filename
,
11298 strlen (filename
));
11300 len
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_readlink
,
11301 remote_errno
, &attachment
,
11307 ret
= (char *) xmalloc (len
+ 1);
11309 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11310 (gdb_byte
*) ret
, len
);
11311 if (read_len
!= len
)
11312 error (_("Readlink returned %d, but %d bytes."), len
, read_len
);
11318 /* Implementation of to_fileio_fstat. */
11321 remote_hostio_fstat (struct target_ops
*self
,
11322 int fd
, struct stat
*st
,
11325 struct remote_state
*rs
= get_remote_state ();
11327 int left
= get_remote_packet_size ();
11328 int attachment_len
, ret
;
11330 struct fio_stat fst
;
11333 remote_buffer_add_string (&p
, &left
, "vFile:fstat:");
11335 remote_buffer_add_int (&p
, &left
, fd
);
11337 ret
= remote_hostio_send_command (p
- rs
->buf
, PACKET_vFile_fstat
,
11338 remote_errno
, &attachment
,
11342 if (*remote_errno
!= FILEIO_ENOSYS
)
11345 /* Strictly we should return -1, ENOSYS here, but when
11346 "set sysroot remote:" was implemented in August 2008
11347 BFD's need for a stat function was sidestepped with
11348 this hack. This was not remedied until March 2015
11349 so we retain the previous behavior to avoid breaking
11352 Note that the memset is a March 2015 addition; older
11353 GDBs set st_size *and nothing else* so the structure
11354 would have garbage in all other fields. This might
11355 break something but retaining the previous behavior
11356 here would be just too wrong. */
11358 memset (st
, 0, sizeof (struct stat
));
11359 st
->st_size
= INT_MAX
;
11363 read_len
= remote_unescape_input ((gdb_byte
*) attachment
, attachment_len
,
11364 (gdb_byte
*) &fst
, sizeof (fst
));
11366 if (read_len
!= ret
)
11367 error (_("vFile:fstat returned %d, but %d bytes."), ret
, read_len
);
11369 if (read_len
!= sizeof (fst
))
11370 error (_("vFile:fstat returned %d bytes, but expecting %d."),
11371 read_len
, (int) sizeof (fst
));
11373 remote_fileio_to_host_stat (&fst
, st
);
11378 /* Implementation of to_filesystem_is_local. */
11381 remote_filesystem_is_local (struct target_ops
*self
)
11383 /* Valgrind GDB presents itself as a remote target but works
11384 on the local filesystem: it does not implement remote get
11385 and users are not expected to set a sysroot. To handle
11386 this case we treat the remote filesystem as local if the
11387 sysroot is exactly TARGET_SYSROOT_PREFIX and if the stub
11388 does not support vFile:open. */
11389 if (strcmp (gdb_sysroot
, TARGET_SYSROOT_PREFIX
) == 0)
11391 enum packet_support ps
= packet_support (PACKET_vFile_open
);
11393 if (ps
== PACKET_SUPPORT_UNKNOWN
)
11395 int fd
, remote_errno
;
11397 /* Try opening a file to probe support. The supplied
11398 filename is irrelevant, we only care about whether
11399 the stub recognizes the packet or not. */
11400 fd
= remote_hostio_open (self
, NULL
, "just probing",
11401 FILEIO_O_RDONLY
, 0700, 0,
11405 remote_hostio_close (self
, fd
, &remote_errno
);
11407 ps
= packet_support (PACKET_vFile_open
);
11410 if (ps
== PACKET_DISABLE
)
11412 static int warning_issued
= 0;
11414 if (!warning_issued
)
11416 warning (_("remote target does not support file"
11417 " transfer, attempting to access files"
11418 " from local filesystem."));
11419 warning_issued
= 1;
11430 remote_fileio_errno_to_host (int errnum
)
11436 case FILEIO_ENOENT
:
11444 case FILEIO_EACCES
:
11446 case FILEIO_EFAULT
:
11450 case FILEIO_EEXIST
:
11452 case FILEIO_ENODEV
:
11454 case FILEIO_ENOTDIR
:
11456 case FILEIO_EISDIR
:
11458 case FILEIO_EINVAL
:
11460 case FILEIO_ENFILE
:
11462 case FILEIO_EMFILE
:
11466 case FILEIO_ENOSPC
:
11468 case FILEIO_ESPIPE
:
11472 case FILEIO_ENOSYS
:
11474 case FILEIO_ENAMETOOLONG
:
11475 return ENAMETOOLONG
;
11481 remote_hostio_error (int errnum
)
11483 int host_error
= remote_fileio_errno_to_host (errnum
);
11485 if (host_error
== -1)
11486 error (_("Unknown remote I/O error %d"), errnum
);
11488 error (_("Remote I/O error: %s"), safe_strerror (host_error
));
11492 remote_hostio_close_cleanup (void *opaque
)
11494 int fd
= *(int *) opaque
;
11497 remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
);
11501 remote_file_put (const char *local_file
, const char *remote_file
, int from_tty
)
11503 struct cleanup
*back_to
, *close_cleanup
;
11504 int retcode
, fd
, remote_errno
, bytes
, io_size
;
11507 int bytes_in_buffer
;
11510 struct remote_state
*rs
= get_remote_state ();
11512 if (!rs
->remote_desc
)
11513 error (_("command can only be used with remote target"));
11515 file
= gdb_fopen_cloexec (local_file
, "rb");
11517 perror_with_name (local_file
);
11518 back_to
= make_cleanup_fclose (file
);
11520 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11521 remote_file
, (FILEIO_O_WRONLY
| FILEIO_O_CREAT
11523 0700, 0, &remote_errno
);
11525 remote_hostio_error (remote_errno
);
11527 /* Send up to this many bytes at once. They won't all fit in the
11528 remote packet limit, so we'll transfer slightly fewer. */
11529 io_size
= get_remote_packet_size ();
11530 buffer
= (gdb_byte
*) xmalloc (io_size
);
11531 make_cleanup (xfree
, buffer
);
11533 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11535 bytes_in_buffer
= 0;
11538 while (bytes_in_buffer
|| !saw_eof
)
11542 bytes
= fread (buffer
+ bytes_in_buffer
, 1,
11543 io_size
- bytes_in_buffer
,
11548 error (_("Error reading %s."), local_file
);
11551 /* EOF. Unless there is something still in the
11552 buffer from the last iteration, we are done. */
11554 if (bytes_in_buffer
== 0)
11562 bytes
+= bytes_in_buffer
;
11563 bytes_in_buffer
= 0;
11565 retcode
= remote_hostio_pwrite (find_target_at (process_stratum
),
11567 offset
, &remote_errno
);
11570 remote_hostio_error (remote_errno
);
11571 else if (retcode
== 0)
11572 error (_("Remote write of %d bytes returned 0!"), bytes
);
11573 else if (retcode
< bytes
)
11575 /* Short write. Save the rest of the read data for the next
11577 bytes_in_buffer
= bytes
- retcode
;
11578 memmove (buffer
, buffer
+ retcode
, bytes_in_buffer
);
11584 discard_cleanups (close_cleanup
);
11585 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
11586 remote_hostio_error (remote_errno
);
11589 printf_filtered (_("Successfully sent file \"%s\".\n"), local_file
);
11590 do_cleanups (back_to
);
11594 remote_file_get (const char *remote_file
, const char *local_file
, int from_tty
)
11596 struct cleanup
*back_to
, *close_cleanup
;
11597 int fd
, remote_errno
, bytes
, io_size
;
11601 struct remote_state
*rs
= get_remote_state ();
11603 if (!rs
->remote_desc
)
11604 error (_("command can only be used with remote target"));
11606 fd
= remote_hostio_open (find_target_at (process_stratum
), NULL
,
11607 remote_file
, FILEIO_O_RDONLY
, 0, 0,
11610 remote_hostio_error (remote_errno
);
11612 file
= gdb_fopen_cloexec (local_file
, "wb");
11614 perror_with_name (local_file
);
11615 back_to
= make_cleanup_fclose (file
);
11617 /* Send up to this many bytes at once. They won't all fit in the
11618 remote packet limit, so we'll transfer slightly fewer. */
11619 io_size
= get_remote_packet_size ();
11620 buffer
= (gdb_byte
*) xmalloc (io_size
);
11621 make_cleanup (xfree
, buffer
);
11623 close_cleanup
= make_cleanup (remote_hostio_close_cleanup
, &fd
);
11628 bytes
= remote_hostio_pread (find_target_at (process_stratum
),
11629 fd
, buffer
, io_size
, offset
, &remote_errno
);
11631 /* Success, but no bytes, means end-of-file. */
11634 remote_hostio_error (remote_errno
);
11638 bytes
= fwrite (buffer
, 1, bytes
, file
);
11640 perror_with_name (local_file
);
11643 discard_cleanups (close_cleanup
);
11644 if (remote_hostio_close (find_target_at (process_stratum
), fd
, &remote_errno
))
11645 remote_hostio_error (remote_errno
);
11648 printf_filtered (_("Successfully fetched file \"%s\".\n"), remote_file
);
11649 do_cleanups (back_to
);
11653 remote_file_delete (const char *remote_file
, int from_tty
)
11655 int retcode
, remote_errno
;
11656 struct remote_state
*rs
= get_remote_state ();
11658 if (!rs
->remote_desc
)
11659 error (_("command can only be used with remote target"));
11661 retcode
= remote_hostio_unlink (find_target_at (process_stratum
),
11662 NULL
, remote_file
, &remote_errno
);
11664 remote_hostio_error (remote_errno
);
11667 printf_filtered (_("Successfully deleted file \"%s\".\n"), remote_file
);
11671 remote_put_command (char *args
, int from_tty
)
11673 struct cleanup
*back_to
;
11677 error_no_arg (_("file to put"));
11679 argv
= gdb_buildargv (args
);
11680 back_to
= make_cleanup_freeargv (argv
);
11681 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
11682 error (_("Invalid parameters to remote put"));
11684 remote_file_put (argv
[0], argv
[1], from_tty
);
11686 do_cleanups (back_to
);
11690 remote_get_command (char *args
, int from_tty
)
11692 struct cleanup
*back_to
;
11696 error_no_arg (_("file to get"));
11698 argv
= gdb_buildargv (args
);
11699 back_to
= make_cleanup_freeargv (argv
);
11700 if (argv
[0] == NULL
|| argv
[1] == NULL
|| argv
[2] != NULL
)
11701 error (_("Invalid parameters to remote get"));
11703 remote_file_get (argv
[0], argv
[1], from_tty
);
11705 do_cleanups (back_to
);
11709 remote_delete_command (char *args
, int from_tty
)
11711 struct cleanup
*back_to
;
11715 error_no_arg (_("file to delete"));
11717 argv
= gdb_buildargv (args
);
11718 back_to
= make_cleanup_freeargv (argv
);
11719 if (argv
[0] == NULL
|| argv
[1] != NULL
)
11720 error (_("Invalid parameters to remote delete"));
11722 remote_file_delete (argv
[0], from_tty
);
11724 do_cleanups (back_to
);
11728 remote_command (char *args
, int from_tty
)
11730 help_list (remote_cmdlist
, "remote ", all_commands
, gdb_stdout
);
11734 remote_can_execute_reverse (struct target_ops
*self
)
11736 if (packet_support (PACKET_bs
) == PACKET_ENABLE
11737 || packet_support (PACKET_bc
) == PACKET_ENABLE
)
11744 remote_supports_non_stop (struct target_ops
*self
)
11750 remote_supports_disable_randomization (struct target_ops
*self
)
11752 /* Only supported in extended mode. */
11757 remote_supports_multi_process (struct target_ops
*self
)
11759 struct remote_state
*rs
= get_remote_state ();
11761 return remote_multi_process_p (rs
);
11765 remote_supports_cond_tracepoints (void)
11767 return packet_support (PACKET_ConditionalTracepoints
) == PACKET_ENABLE
;
11771 remote_supports_cond_breakpoints (struct target_ops
*self
)
11773 return packet_support (PACKET_ConditionalBreakpoints
) == PACKET_ENABLE
;
11777 remote_supports_fast_tracepoints (void)
11779 return packet_support (PACKET_FastTracepoints
) == PACKET_ENABLE
;
11783 remote_supports_static_tracepoints (void)
11785 return packet_support (PACKET_StaticTracepoints
) == PACKET_ENABLE
;
11789 remote_supports_install_in_trace (void)
11791 return packet_support (PACKET_InstallInTrace
) == PACKET_ENABLE
;
11795 remote_supports_enable_disable_tracepoint (struct target_ops
*self
)
11797 return (packet_support (PACKET_EnableDisableTracepoints_feature
)
11802 remote_supports_string_tracing (struct target_ops
*self
)
11804 return packet_support (PACKET_tracenz_feature
) == PACKET_ENABLE
;
11808 remote_can_run_breakpoint_commands (struct target_ops
*self
)
11810 return packet_support (PACKET_BreakpointCommands
) == PACKET_ENABLE
;
11814 remote_trace_init (struct target_ops
*self
)
11817 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11818 if (strcmp (target_buf
, "OK") != 0)
11819 error (_("Target does not support this command."));
11822 static void free_actions_list (char **actions_list
);
11823 static void free_actions_list_cleanup_wrapper (void *);
11825 free_actions_list_cleanup_wrapper (void *al
)
11827 free_actions_list ((char **) al
);
11831 free_actions_list (char **actions_list
)
11835 if (actions_list
== 0)
11838 for (ndx
= 0; actions_list
[ndx
]; ndx
++)
11839 xfree (actions_list
[ndx
]);
11841 xfree (actions_list
);
11844 /* Recursive routine to walk through command list including loops, and
11845 download packets for each command. */
11848 remote_download_command_source (int num
, ULONGEST addr
,
11849 struct command_line
*cmds
)
11851 struct remote_state
*rs
= get_remote_state ();
11852 struct command_line
*cmd
;
11854 for (cmd
= cmds
; cmd
; cmd
= cmd
->next
)
11856 QUIT
; /* Allow user to bail out with ^C. */
11857 strcpy (rs
->buf
, "QTDPsrc:");
11858 encode_source_string (num
, addr
, "cmd", cmd
->line
,
11859 rs
->buf
+ strlen (rs
->buf
),
11860 rs
->buf_size
- strlen (rs
->buf
));
11862 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11863 if (strcmp (target_buf
, "OK"))
11864 warning (_("Target does not support source download."));
11866 if (cmd
->control_type
== while_control
11867 || cmd
->control_type
== while_stepping_control
)
11869 remote_download_command_source (num
, addr
, *cmd
->body_list
);
11871 QUIT
; /* Allow user to bail out with ^C. */
11872 strcpy (rs
->buf
, "QTDPsrc:");
11873 encode_source_string (num
, addr
, "cmd", "end",
11874 rs
->buf
+ strlen (rs
->buf
),
11875 rs
->buf_size
- strlen (rs
->buf
));
11877 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11878 if (strcmp (target_buf
, "OK"))
11879 warning (_("Target does not support source download."));
11885 remote_download_tracepoint (struct target_ops
*self
, struct bp_location
*loc
)
11887 #define BUF_SIZE 2048
11891 char buf
[BUF_SIZE
];
11892 char **tdp_actions
;
11893 char **stepping_actions
;
11895 struct cleanup
*old_chain
= NULL
;
11896 struct agent_expr
*aexpr
;
11897 struct cleanup
*aexpr_chain
= NULL
;
11899 struct breakpoint
*b
= loc
->owner
;
11900 struct tracepoint
*t
= (struct tracepoint
*) b
;
11902 encode_actions_rsp (loc
, &tdp_actions
, &stepping_actions
);
11903 old_chain
= make_cleanup (free_actions_list_cleanup_wrapper
,
11905 (void) make_cleanup (free_actions_list_cleanup_wrapper
,
11908 tpaddr
= loc
->address
;
11909 sprintf_vma (addrbuf
, tpaddr
);
11910 xsnprintf (buf
, BUF_SIZE
, "QTDP:%x:%s:%c:%lx:%x", b
->number
,
11911 addrbuf
, /* address */
11912 (b
->enable_state
== bp_enabled
? 'E' : 'D'),
11913 t
->step_count
, t
->pass_count
);
11914 /* Fast tracepoints are mostly handled by the target, but we can
11915 tell the target how big of an instruction block should be moved
11917 if (b
->type
== bp_fast_tracepoint
)
11919 /* Only test for support at download time; we may not know
11920 target capabilities at definition time. */
11921 if (remote_supports_fast_tracepoints ())
11923 if (gdbarch_fast_tracepoint_valid_at (loc
->gdbarch
, tpaddr
,
11925 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":F%x",
11926 gdb_insn_length (loc
->gdbarch
, tpaddr
));
11928 /* If it passed validation at definition but fails now,
11929 something is very wrong. */
11930 internal_error (__FILE__
, __LINE__
,
11931 _("Fast tracepoint not "
11932 "valid during download"));
11935 /* Fast tracepoints are functionally identical to regular
11936 tracepoints, so don't take lack of support as a reason to
11937 give up on the trace run. */
11938 warning (_("Target does not support fast tracepoints, "
11939 "downloading %d as regular tracepoint"), b
->number
);
11941 else if (b
->type
== bp_static_tracepoint
)
11943 /* Only test for support at download time; we may not know
11944 target capabilities at definition time. */
11945 if (remote_supports_static_tracepoints ())
11947 struct static_tracepoint_marker marker
;
11949 if (target_static_tracepoint_marker_at (tpaddr
, &marker
))
11950 strcat (buf
, ":S");
11952 error (_("Static tracepoint not valid during download"));
11955 /* Fast tracepoints are functionally identical to regular
11956 tracepoints, so don't take lack of support as a reason
11957 to give up on the trace run. */
11958 error (_("Target does not support static tracepoints"));
11960 /* If the tracepoint has a conditional, make it into an agent
11961 expression and append to the definition. */
11964 /* Only test support at download time, we may not know target
11965 capabilities at definition time. */
11966 if (remote_supports_cond_tracepoints ())
11968 aexpr
= gen_eval_for_expr (tpaddr
, loc
->cond
);
11969 aexpr_chain
= make_cleanup_free_agent_expr (aexpr
);
11970 xsnprintf (buf
+ strlen (buf
), BUF_SIZE
- strlen (buf
), ":X%x,",
11972 pkt
= buf
+ strlen (buf
);
11973 for (ndx
= 0; ndx
< aexpr
->len
; ++ndx
)
11974 pkt
= pack_hex_byte (pkt
, aexpr
->buf
[ndx
]);
11976 do_cleanups (aexpr_chain
);
11979 warning (_("Target does not support conditional tracepoints, "
11980 "ignoring tp %d cond"), b
->number
);
11983 if (b
->commands
|| *default_collect
)
11986 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
11987 if (strcmp (target_buf
, "OK"))
11988 error (_("Target does not support tracepoints."));
11990 /* do_single_steps (t); */
11993 for (ndx
= 0; tdp_actions
[ndx
]; ndx
++)
11995 QUIT
; /* Allow user to bail out with ^C. */
11996 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%c",
11997 b
->number
, addrbuf
, /* address */
11999 ((tdp_actions
[ndx
+ 1] || stepping_actions
)
12002 remote_get_noisy_reply (&target_buf
,
12004 if (strcmp (target_buf
, "OK"))
12005 error (_("Error on target while setting tracepoints."));
12008 if (stepping_actions
)
12010 for (ndx
= 0; stepping_actions
[ndx
]; ndx
++)
12012 QUIT
; /* Allow user to bail out with ^C. */
12013 xsnprintf (buf
, BUF_SIZE
, "QTDP:-%x:%s:%s%s%s",
12014 b
->number
, addrbuf
, /* address */
12015 ((ndx
== 0) ? "S" : ""),
12016 stepping_actions
[ndx
],
12017 (stepping_actions
[ndx
+ 1] ? "-" : ""));
12019 remote_get_noisy_reply (&target_buf
,
12021 if (strcmp (target_buf
, "OK"))
12022 error (_("Error on target while setting tracepoints."));
12026 if (packet_support (PACKET_TracepointSource
) == PACKET_ENABLE
)
12028 if (b
->location
!= NULL
)
12030 strcpy (buf
, "QTDPsrc:");
12031 encode_source_string (b
->number
, loc
->address
, "at",
12032 event_location_to_string (b
->location
),
12033 buf
+ strlen (buf
), 2048 - strlen (buf
));
12035 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12036 if (strcmp (target_buf
, "OK"))
12037 warning (_("Target does not support source download."));
12039 if (b
->cond_string
)
12041 strcpy (buf
, "QTDPsrc:");
12042 encode_source_string (b
->number
, loc
->address
,
12043 "cond", b
->cond_string
, buf
+ strlen (buf
),
12044 2048 - strlen (buf
));
12046 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12047 if (strcmp (target_buf
, "OK"))
12048 warning (_("Target does not support source download."));
12050 remote_download_command_source (b
->number
, loc
->address
,
12051 breakpoint_commands (b
));
12054 do_cleanups (old_chain
);
12058 remote_can_download_tracepoint (struct target_ops
*self
)
12060 struct remote_state
*rs
= get_remote_state ();
12061 struct trace_status
*ts
;
12064 /* Don't try to install tracepoints until we've relocated our
12065 symbols, and fetched and merged the target's tracepoint list with
12067 if (rs
->starting_up
)
12070 ts
= current_trace_status ();
12071 status
= remote_get_trace_status (self
, ts
);
12073 if (status
== -1 || !ts
->running_known
|| !ts
->running
)
12076 /* If we are in a tracing experiment, but remote stub doesn't support
12077 installing tracepoint in trace, we have to return. */
12078 if (!remote_supports_install_in_trace ())
12086 remote_download_trace_state_variable (struct target_ops
*self
,
12087 struct trace_state_variable
*tsv
)
12089 struct remote_state
*rs
= get_remote_state ();
12092 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDV:%x:%s:%x:",
12093 tsv
->number
, phex ((ULONGEST
) tsv
->initial_value
, 8),
12095 p
= rs
->buf
+ strlen (rs
->buf
);
12096 if ((p
- rs
->buf
) + strlen (tsv
->name
) * 2 >= get_remote_packet_size ())
12097 error (_("Trace state variable name too long for tsv definition packet"));
12098 p
+= 2 * bin2hex ((gdb_byte
*) (tsv
->name
), p
, strlen (tsv
->name
));
12101 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12102 if (*target_buf
== '\0')
12103 error (_("Target does not support this command."));
12104 if (strcmp (target_buf
, "OK") != 0)
12105 error (_("Error on target while downloading trace state variable."));
12109 remote_enable_tracepoint (struct target_ops
*self
,
12110 struct bp_location
*location
)
12112 struct remote_state
*rs
= get_remote_state ();
12115 sprintf_vma (addr_buf
, location
->address
);
12116 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTEnable:%x:%s",
12117 location
->owner
->number
, addr_buf
);
12119 remote_get_noisy_reply (&rs
->buf
, &rs
->buf_size
);
12120 if (*rs
->buf
== '\0')
12121 error (_("Target does not support enabling tracepoints while a trace run is ongoing."));
12122 if (strcmp (rs
->buf
, "OK") != 0)
12123 error (_("Error on target while enabling tracepoint."));
12127 remote_disable_tracepoint (struct target_ops
*self
,
12128 struct bp_location
*location
)
12130 struct remote_state
*rs
= get_remote_state ();
12133 sprintf_vma (addr_buf
, location
->address
);
12134 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisable:%x:%s",
12135 location
->owner
->number
, addr_buf
);
12137 remote_get_noisy_reply (&rs
->buf
, &rs
->buf_size
);
12138 if (*rs
->buf
== '\0')
12139 error (_("Target does not support disabling tracepoints while a trace run is ongoing."));
12140 if (strcmp (rs
->buf
, "OK") != 0)
12141 error (_("Error on target while disabling tracepoint."));
12145 remote_trace_set_readonly_regions (struct target_ops
*self
)
12149 bfd_size_type size
;
12155 return; /* No information to give. */
12157 strcpy (target_buf
, "QTro");
12158 offset
= strlen (target_buf
);
12159 for (s
= exec_bfd
->sections
; s
; s
= s
->next
)
12161 char tmp1
[40], tmp2
[40];
12164 if ((s
->flags
& SEC_LOAD
) == 0 ||
12165 /* (s->flags & SEC_CODE) == 0 || */
12166 (s
->flags
& SEC_READONLY
) == 0)
12170 vma
= bfd_get_section_vma (abfd
, s
);
12171 size
= bfd_get_section_size (s
);
12172 sprintf_vma (tmp1
, vma
);
12173 sprintf_vma (tmp2
, vma
+ size
);
12174 sec_length
= 1 + strlen (tmp1
) + 1 + strlen (tmp2
);
12175 if (offset
+ sec_length
+ 1 > target_buf_size
)
12177 if (packet_support (PACKET_qXfer_traceframe_info
) != PACKET_ENABLE
)
12179 Too many sections for read-only sections definition packet."));
12182 xsnprintf (target_buf
+ offset
, target_buf_size
- offset
, ":%s,%s",
12184 offset
+= sec_length
;
12188 putpkt (target_buf
);
12189 getpkt (&target_buf
, &target_buf_size
, 0);
12194 remote_trace_start (struct target_ops
*self
)
12196 putpkt ("QTStart");
12197 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12198 if (*target_buf
== '\0')
12199 error (_("Target does not support this command."));
12200 if (strcmp (target_buf
, "OK") != 0)
12201 error (_("Bogus reply from target: %s"), target_buf
);
12205 remote_get_trace_status (struct target_ops
*self
, struct trace_status
*ts
)
12207 /* Initialize it just to avoid a GCC false warning. */
12209 /* FIXME we need to get register block size some other way. */
12210 extern int trace_regblock_size
;
12211 enum packet_result result
;
12213 if (packet_support (PACKET_qTStatus
) == PACKET_DISABLE
)
12216 trace_regblock_size
= get_remote_arch_state ()->sizeof_g_packet
;
12218 putpkt ("qTStatus");
12222 p
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12224 CATCH (ex
, RETURN_MASK_ERROR
)
12226 if (ex
.error
!= TARGET_CLOSE_ERROR
)
12228 exception_fprintf (gdb_stderr
, ex
, "qTStatus: ");
12231 throw_exception (ex
);
12235 result
= packet_ok (p
, &remote_protocol_packets
[PACKET_qTStatus
]);
12237 /* If the remote target doesn't do tracing, flag it. */
12238 if (result
== PACKET_UNKNOWN
)
12241 /* We're working with a live target. */
12242 ts
->filename
= NULL
;
12245 error (_("Bogus trace status reply from target: %s"), target_buf
);
12247 /* Function 'parse_trace_status' sets default value of each field of
12248 'ts' at first, so we don't have to do it here. */
12249 parse_trace_status (p
, ts
);
12251 return ts
->running
;
12255 remote_get_tracepoint_status (struct target_ops
*self
, struct breakpoint
*bp
,
12256 struct uploaded_tp
*utp
)
12258 struct remote_state
*rs
= get_remote_state ();
12260 struct bp_location
*loc
;
12261 struct tracepoint
*tp
= (struct tracepoint
*) bp
;
12262 size_t size
= get_remote_packet_size ();
12266 tp
->base
.hit_count
= 0;
12267 tp
->traceframe_usage
= 0;
12268 for (loc
= tp
->base
.loc
; loc
; loc
= loc
->next
)
12270 /* If the tracepoint was never downloaded, don't go asking for
12272 if (tp
->number_on_target
== 0)
12274 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", tp
->number_on_target
,
12275 phex_nz (loc
->address
, 0));
12277 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12278 if (reply
&& *reply
)
12281 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12287 utp
->hit_count
= 0;
12288 utp
->traceframe_usage
= 0;
12289 xsnprintf (rs
->buf
, size
, "qTP:%x:%s", utp
->number
,
12290 phex_nz (utp
->addr
, 0));
12292 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12293 if (reply
&& *reply
)
12296 parse_tracepoint_status (reply
+ 1, bp
, utp
);
12302 remote_trace_stop (struct target_ops
*self
)
12305 remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12306 if (*target_buf
== '\0')
12307 error (_("Target does not support this command."));
12308 if (strcmp (target_buf
, "OK") != 0)
12309 error (_("Bogus reply from target: %s"), target_buf
);
12313 remote_trace_find (struct target_ops
*self
,
12314 enum trace_find_type type
, int num
,
12315 CORE_ADDR addr1
, CORE_ADDR addr2
,
12318 struct remote_state
*rs
= get_remote_state ();
12319 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12321 int target_frameno
= -1, target_tracept
= -1;
12323 /* Lookups other than by absolute frame number depend on the current
12324 trace selected, so make sure it is correct on the remote end
12326 if (type
!= tfind_number
)
12327 set_remote_traceframe ();
12330 strcpy (p
, "QTFrame:");
12331 p
= strchr (p
, '\0');
12335 xsnprintf (p
, endbuf
- p
, "%x", num
);
12338 xsnprintf (p
, endbuf
- p
, "pc:%s", phex_nz (addr1
, 0));
12341 xsnprintf (p
, endbuf
- p
, "tdp:%x", num
);
12344 xsnprintf (p
, endbuf
- p
, "range:%s:%s", phex_nz (addr1
, 0),
12345 phex_nz (addr2
, 0));
12347 case tfind_outside
:
12348 xsnprintf (p
, endbuf
- p
, "outside:%s:%s", phex_nz (addr1
, 0),
12349 phex_nz (addr2
, 0));
12352 error (_("Unknown trace find type %d"), type
);
12356 reply
= remote_get_noisy_reply (&(rs
->buf
), &rs
->buf_size
);
12357 if (*reply
== '\0')
12358 error (_("Target does not support this command."));
12360 while (reply
&& *reply
)
12365 target_frameno
= (int) strtol (p
, &reply
, 16);
12367 error (_("Unable to parse trace frame number"));
12368 /* Don't update our remote traceframe number cache on failure
12369 to select a remote traceframe. */
12370 if (target_frameno
== -1)
12375 target_tracept
= (int) strtol (p
, &reply
, 16);
12377 error (_("Unable to parse tracepoint number"));
12379 case 'O': /* "OK"? */
12380 if (reply
[1] == 'K' && reply
[2] == '\0')
12383 error (_("Bogus reply from target: %s"), reply
);
12386 error (_("Bogus reply from target: %s"), reply
);
12389 *tpp
= target_tracept
;
12391 rs
->remote_traceframe_number
= target_frameno
;
12392 return target_frameno
;
12396 remote_get_trace_state_variable_value (struct target_ops
*self
,
12397 int tsvnum
, LONGEST
*val
)
12399 struct remote_state
*rs
= get_remote_state ();
12403 set_remote_traceframe ();
12405 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTV:%x", tsvnum
);
12407 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12408 if (reply
&& *reply
)
12412 unpack_varlen_hex (reply
+ 1, &uval
);
12413 *val
= (LONGEST
) uval
;
12421 remote_save_trace_data (struct target_ops
*self
, const char *filename
)
12423 struct remote_state
*rs
= get_remote_state ();
12427 strcpy (p
, "QTSave:");
12429 if ((p
- rs
->buf
) + strlen (filename
) * 2 >= get_remote_packet_size ())
12430 error (_("Remote file name too long for trace save packet"));
12431 p
+= 2 * bin2hex ((gdb_byte
*) filename
, p
, strlen (filename
));
12434 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12435 if (*reply
== '\0')
12436 error (_("Target does not support this command."));
12437 if (strcmp (reply
, "OK") != 0)
12438 error (_("Bogus reply from target: %s"), reply
);
12442 /* This is basically a memory transfer, but needs to be its own packet
12443 because we don't know how the target actually organizes its trace
12444 memory, plus we want to be able to ask for as much as possible, but
12445 not be unhappy if we don't get as much as we ask for. */
12448 remote_get_raw_trace_data (struct target_ops
*self
,
12449 gdb_byte
*buf
, ULONGEST offset
, LONGEST len
)
12451 struct remote_state
*rs
= get_remote_state ();
12457 strcpy (p
, "qTBuffer:");
12459 p
+= hexnumstr (p
, offset
);
12461 p
+= hexnumstr (p
, len
);
12465 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12466 if (reply
&& *reply
)
12468 /* 'l' by itself means we're at the end of the buffer and
12469 there is nothing more to get. */
12473 /* Convert the reply into binary. Limit the number of bytes to
12474 convert according to our passed-in buffer size, rather than
12475 what was returned in the packet; if the target is
12476 unexpectedly generous and gives us a bigger reply than we
12477 asked for, we don't want to crash. */
12478 rslt
= hex2bin (target_buf
, buf
, len
);
12482 /* Something went wrong, flag as an error. */
12487 remote_set_disconnected_tracing (struct target_ops
*self
, int val
)
12489 struct remote_state
*rs
= get_remote_state ();
12491 if (packet_support (PACKET_DisconnectedTracing_feature
) == PACKET_ENABLE
)
12495 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTDisconnected:%x", val
);
12497 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12498 if (*reply
== '\0')
12499 error (_("Target does not support this command."));
12500 if (strcmp (reply
, "OK") != 0)
12501 error (_("Bogus reply from target: %s"), reply
);
12504 warning (_("Target does not support disconnected tracing."));
12508 remote_core_of_thread (struct target_ops
*ops
, ptid_t ptid
)
12510 struct thread_info
*info
= find_thread_ptid (ptid
);
12512 if (info
&& info
->priv
)
12513 return info
->priv
->core
;
12518 remote_set_circular_trace_buffer (struct target_ops
*self
, int val
)
12520 struct remote_state
*rs
= get_remote_state ();
12523 xsnprintf (rs
->buf
, get_remote_packet_size (), "QTBuffer:circular:%x", val
);
12525 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12526 if (*reply
== '\0')
12527 error (_("Target does not support this command."));
12528 if (strcmp (reply
, "OK") != 0)
12529 error (_("Bogus reply from target: %s"), reply
);
12532 static struct traceframe_info
*
12533 remote_traceframe_info (struct target_ops
*self
)
12537 text
= target_read_stralloc (¤t_target
,
12538 TARGET_OBJECT_TRACEFRAME_INFO
, NULL
);
12541 struct traceframe_info
*info
;
12542 struct cleanup
*back_to
= make_cleanup (xfree
, text
);
12544 info
= parse_traceframe_info (text
);
12545 do_cleanups (back_to
);
12552 /* Handle the qTMinFTPILen packet. Returns the minimum length of
12553 instruction on which a fast tracepoint may be placed. Returns -1
12554 if the packet is not supported, and 0 if the minimum instruction
12555 length is unknown. */
12558 remote_get_min_fast_tracepoint_insn_len (struct target_ops
*self
)
12560 struct remote_state
*rs
= get_remote_state ();
12563 /* If we're not debugging a process yet, the IPA can't be
12565 if (!target_has_execution
)
12568 /* Make sure the remote is pointing at the right process. */
12569 set_general_process ();
12571 xsnprintf (rs
->buf
, get_remote_packet_size (), "qTMinFTPILen");
12573 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12574 if (*reply
== '\0')
12578 ULONGEST min_insn_len
;
12580 unpack_varlen_hex (reply
, &min_insn_len
);
12582 return (int) min_insn_len
;
12587 remote_set_trace_buffer_size (struct target_ops
*self
, LONGEST val
)
12589 if (packet_support (PACKET_QTBuffer_size
) != PACKET_DISABLE
)
12591 struct remote_state
*rs
= get_remote_state ();
12592 char *buf
= rs
->buf
;
12593 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12594 enum packet_result result
;
12596 gdb_assert (val
>= 0 || val
== -1);
12597 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTBuffer:size:");
12598 /* Send -1 as literal "-1" to avoid host size dependency. */
12602 buf
+= hexnumstr (buf
, (ULONGEST
) -val
);
12605 buf
+= hexnumstr (buf
, (ULONGEST
) val
);
12608 remote_get_noisy_reply (&rs
->buf
, &rs
->buf_size
);
12609 result
= packet_ok (rs
->buf
,
12610 &remote_protocol_packets
[PACKET_QTBuffer_size
]);
12612 if (result
!= PACKET_OK
)
12613 warning (_("Bogus reply from target: %s"), rs
->buf
);
12618 remote_set_trace_notes (struct target_ops
*self
,
12619 const char *user
, const char *notes
,
12620 const char *stop_notes
)
12622 struct remote_state
*rs
= get_remote_state ();
12624 char *buf
= rs
->buf
;
12625 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12628 buf
+= xsnprintf (buf
, endbuf
- buf
, "QTNotes:");
12631 buf
+= xsnprintf (buf
, endbuf
- buf
, "user:");
12632 nbytes
= bin2hex ((gdb_byte
*) user
, buf
, strlen (user
));
12638 buf
+= xsnprintf (buf
, endbuf
- buf
, "notes:");
12639 nbytes
= bin2hex ((gdb_byte
*) notes
, buf
, strlen (notes
));
12645 buf
+= xsnprintf (buf
, endbuf
- buf
, "tstop:");
12646 nbytes
= bin2hex ((gdb_byte
*) stop_notes
, buf
, strlen (stop_notes
));
12650 /* Ensure the buffer is terminated. */
12654 reply
= remote_get_noisy_reply (&target_buf
, &target_buf_size
);
12655 if (*reply
== '\0')
12658 if (strcmp (reply
, "OK") != 0)
12659 error (_("Bogus reply from target: %s"), reply
);
12665 remote_use_agent (struct target_ops
*self
, int use
)
12667 if (packet_support (PACKET_QAgent
) != PACKET_DISABLE
)
12669 struct remote_state
*rs
= get_remote_state ();
12671 /* If the stub supports QAgent. */
12672 xsnprintf (rs
->buf
, get_remote_packet_size (), "QAgent:%d", use
);
12674 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12676 if (strcmp (rs
->buf
, "OK") == 0)
12687 remote_can_use_agent (struct target_ops
*self
)
12689 return (packet_support (PACKET_QAgent
) != PACKET_DISABLE
);
12692 struct btrace_target_info
12694 /* The ptid of the traced thread. */
12697 /* The obtained branch trace configuration. */
12698 struct btrace_config conf
;
12701 /* Reset our idea of our target's btrace configuration. */
12704 remote_btrace_reset (void)
12706 struct remote_state
*rs
= get_remote_state ();
12708 memset (&rs
->btrace_config
, 0, sizeof (rs
->btrace_config
));
12711 /* Check whether the target supports branch tracing. */
12714 remote_supports_btrace (struct target_ops
*self
, enum btrace_format format
)
12716 if (packet_support (PACKET_Qbtrace_off
) != PACKET_ENABLE
)
12718 if (packet_support (PACKET_qXfer_btrace
) != PACKET_ENABLE
)
12723 case BTRACE_FORMAT_NONE
:
12726 case BTRACE_FORMAT_BTS
:
12727 return (packet_support (PACKET_Qbtrace_bts
) == PACKET_ENABLE
);
12729 case BTRACE_FORMAT_PT
:
12730 /* The trace is decoded on the host. Even if our target supports it,
12731 we still need to have libipt to decode the trace. */
12732 #if defined (HAVE_LIBIPT)
12733 return (packet_support (PACKET_Qbtrace_pt
) == PACKET_ENABLE
);
12734 #else /* !defined (HAVE_LIBIPT) */
12736 #endif /* !defined (HAVE_LIBIPT) */
12739 internal_error (__FILE__
, __LINE__
, _("Unknown branch trace format"));
12742 /* Synchronize the configuration with the target. */
12745 btrace_sync_conf (const struct btrace_config
*conf
)
12747 struct packet_config
*packet
;
12748 struct remote_state
*rs
;
12749 char *buf
, *pos
, *endbuf
;
12751 rs
= get_remote_state ();
12753 endbuf
= buf
+ get_remote_packet_size ();
12755 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
];
12756 if (packet_config_support (packet
) == PACKET_ENABLE
12757 && conf
->bts
.size
!= rs
->btrace_config
.bts
.size
)
12760 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
12764 getpkt (&buf
, &rs
->buf_size
, 0);
12766 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
12768 if (buf
[0] == 'E' && buf
[1] == '.')
12769 error (_("Failed to configure the BTS buffer size: %s"), buf
+ 2);
12771 error (_("Failed to configure the BTS buffer size."));
12774 rs
->btrace_config
.bts
.size
= conf
->bts
.size
;
12777 packet
= &remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
];
12778 if (packet_config_support (packet
) == PACKET_ENABLE
12779 && conf
->pt
.size
!= rs
->btrace_config
.pt
.size
)
12782 pos
+= xsnprintf (pos
, endbuf
- pos
, "%s=0x%x", packet
->name
,
12786 getpkt (&buf
, &rs
->buf_size
, 0);
12788 if (packet_ok (buf
, packet
) == PACKET_ERROR
)
12790 if (buf
[0] == 'E' && buf
[1] == '.')
12791 error (_("Failed to configure the trace buffer size: %s"), buf
+ 2);
12793 error (_("Failed to configure the trace buffer size."));
12796 rs
->btrace_config
.pt
.size
= conf
->pt
.size
;
12800 /* Read the current thread's btrace configuration from the target and
12801 store it into CONF. */
12804 btrace_read_config (struct btrace_config
*conf
)
12808 xml
= target_read_stralloc (¤t_target
,
12809 TARGET_OBJECT_BTRACE_CONF
, "");
12812 struct cleanup
*cleanup
;
12814 cleanup
= make_cleanup (xfree
, xml
);
12815 parse_xml_btrace_conf (conf
, xml
);
12816 do_cleanups (cleanup
);
12820 /* Enable branch tracing. */
12822 static struct btrace_target_info
*
12823 remote_enable_btrace (struct target_ops
*self
, ptid_t ptid
,
12824 const struct btrace_config
*conf
)
12826 struct btrace_target_info
*tinfo
= NULL
;
12827 struct packet_config
*packet
= NULL
;
12828 struct remote_state
*rs
= get_remote_state ();
12829 char *buf
= rs
->buf
;
12830 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12832 switch (conf
->format
)
12834 case BTRACE_FORMAT_BTS
:
12835 packet
= &remote_protocol_packets
[PACKET_Qbtrace_bts
];
12838 case BTRACE_FORMAT_PT
:
12839 packet
= &remote_protocol_packets
[PACKET_Qbtrace_pt
];
12843 if (packet
== NULL
|| packet_config_support (packet
) != PACKET_ENABLE
)
12844 error (_("Target does not support branch tracing."));
12846 btrace_sync_conf (conf
);
12848 set_general_thread (ptid
);
12850 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
12852 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12854 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
12856 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
12857 error (_("Could not enable branch tracing for %s: %s"),
12858 target_pid_to_str (ptid
), rs
->buf
+ 2);
12860 error (_("Could not enable branch tracing for %s."),
12861 target_pid_to_str (ptid
));
12864 tinfo
= XCNEW (struct btrace_target_info
);
12865 tinfo
->ptid
= ptid
;
12867 /* If we fail to read the configuration, we lose some information, but the
12868 tracing itself is not impacted. */
12871 btrace_read_config (&tinfo
->conf
);
12873 CATCH (err
, RETURN_MASK_ERROR
)
12875 if (err
.message
!= NULL
)
12876 warning ("%s", err
.message
);
12883 /* Disable branch tracing. */
12886 remote_disable_btrace (struct target_ops
*self
,
12887 struct btrace_target_info
*tinfo
)
12889 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_Qbtrace_off
];
12890 struct remote_state
*rs
= get_remote_state ();
12891 char *buf
= rs
->buf
;
12892 char *endbuf
= rs
->buf
+ get_remote_packet_size ();
12894 if (packet_config_support (packet
) != PACKET_ENABLE
)
12895 error (_("Target does not support branch tracing."));
12897 set_general_thread (tinfo
->ptid
);
12899 buf
+= xsnprintf (buf
, endbuf
- buf
, "%s", packet
->name
);
12901 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
12903 if (packet_ok (rs
->buf
, packet
) == PACKET_ERROR
)
12905 if (rs
->buf
[0] == 'E' && rs
->buf
[1] == '.')
12906 error (_("Could not disable branch tracing for %s: %s"),
12907 target_pid_to_str (tinfo
->ptid
), rs
->buf
+ 2);
12909 error (_("Could not disable branch tracing for %s."),
12910 target_pid_to_str (tinfo
->ptid
));
12916 /* Teardown branch tracing. */
12919 remote_teardown_btrace (struct target_ops
*self
,
12920 struct btrace_target_info
*tinfo
)
12922 /* We must not talk to the target during teardown. */
12926 /* Read the branch trace. */
12928 static enum btrace_error
12929 remote_read_btrace (struct target_ops
*self
,
12930 struct btrace_data
*btrace
,
12931 struct btrace_target_info
*tinfo
,
12932 enum btrace_read_type type
)
12934 struct packet_config
*packet
= &remote_protocol_packets
[PACKET_qXfer_btrace
];
12935 struct cleanup
*cleanup
;
12939 if (packet_config_support (packet
) != PACKET_ENABLE
)
12940 error (_("Target does not support branch tracing."));
12942 #if !defined(HAVE_LIBEXPAT)
12943 error (_("Cannot process branch tracing result. XML parsing not supported."));
12948 case BTRACE_READ_ALL
:
12951 case BTRACE_READ_NEW
:
12954 case BTRACE_READ_DELTA
:
12958 internal_error (__FILE__
, __LINE__
,
12959 _("Bad branch tracing read type: %u."),
12960 (unsigned int) type
);
12963 xml
= target_read_stralloc (¤t_target
,
12964 TARGET_OBJECT_BTRACE
, annex
);
12966 return BTRACE_ERR_UNKNOWN
;
12968 cleanup
= make_cleanup (xfree
, xml
);
12969 parse_xml_btrace (btrace
, xml
);
12970 do_cleanups (cleanup
);
12972 return BTRACE_ERR_NONE
;
12975 static const struct btrace_config
*
12976 remote_btrace_conf (struct target_ops
*self
,
12977 const struct btrace_target_info
*tinfo
)
12979 return &tinfo
->conf
;
12983 remote_augmented_libraries_svr4_read (struct target_ops
*self
)
12985 return (packet_support (PACKET_augmented_libraries_svr4_read_feature
)
12989 /* Implementation of to_load. */
12992 remote_load (struct target_ops
*self
, const char *name
, int from_tty
)
12994 generic_load (name
, from_tty
);
12997 /* Accepts an integer PID; returns a string representing a file that
12998 can be opened on the remote side to get the symbols for the child
12999 process. Returns NULL if the operation is not supported. */
13002 remote_pid_to_exec_file (struct target_ops
*self
, int pid
)
13004 static char *filename
= NULL
;
13005 struct inferior
*inf
;
13006 char *annex
= NULL
;
13008 if (packet_support (PACKET_qXfer_exec_file
) != PACKET_ENABLE
)
13011 if (filename
!= NULL
)
13014 inf
= find_inferior_pid (pid
);
13016 internal_error (__FILE__
, __LINE__
,
13017 _("not currently attached to process %d"), pid
);
13019 if (!inf
->fake_pid_p
)
13021 const int annex_size
= 9;
13023 annex
= (char *) alloca (annex_size
);
13024 xsnprintf (annex
, annex_size
, "%x", pid
);
13027 filename
= target_read_stralloc (¤t_target
,
13028 TARGET_OBJECT_EXEC_FILE
, annex
);
13033 /* Implement the to_can_do_single_step target_ops method. */
13036 remote_can_do_single_step (struct target_ops
*ops
)
13038 /* We can only tell whether target supports single step or not by
13039 supported s and S vCont actions if the stub supports vContSupported
13040 feature. If the stub doesn't support vContSupported feature,
13041 we have conservatively to think target doesn't supports single
13043 if (packet_support (PACKET_vContSupported
) == PACKET_ENABLE
)
13045 struct remote_state
*rs
= get_remote_state ();
13047 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13048 remote_vcont_probe (rs
);
13050 return rs
->supports_vCont
.s
&& rs
->supports_vCont
.S
;
13057 init_remote_ops (void)
13059 remote_ops
.to_shortname
= "remote";
13060 remote_ops
.to_longname
= "Remote serial target in gdb-specific protocol";
13061 remote_ops
.to_doc
=
13062 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13063 Specify the serial device it is connected to\n\
13064 (e.g. /dev/ttyS0, /dev/ttya, COM1, etc.).";
13065 remote_ops
.to_open
= remote_open
;
13066 remote_ops
.to_close
= remote_close
;
13067 remote_ops
.to_detach
= remote_detach
;
13068 remote_ops
.to_disconnect
= remote_disconnect
;
13069 remote_ops
.to_resume
= remote_resume
;
13070 remote_ops
.to_wait
= remote_wait
;
13071 remote_ops
.to_fetch_registers
= remote_fetch_registers
;
13072 remote_ops
.to_store_registers
= remote_store_registers
;
13073 remote_ops
.to_prepare_to_store
= remote_prepare_to_store
;
13074 remote_ops
.to_files_info
= remote_files_info
;
13075 remote_ops
.to_insert_breakpoint
= remote_insert_breakpoint
;
13076 remote_ops
.to_remove_breakpoint
= remote_remove_breakpoint
;
13077 remote_ops
.to_stopped_by_sw_breakpoint
= remote_stopped_by_sw_breakpoint
;
13078 remote_ops
.to_supports_stopped_by_sw_breakpoint
= remote_supports_stopped_by_sw_breakpoint
;
13079 remote_ops
.to_stopped_by_hw_breakpoint
= remote_stopped_by_hw_breakpoint
;
13080 remote_ops
.to_supports_stopped_by_hw_breakpoint
= remote_supports_stopped_by_hw_breakpoint
;
13081 remote_ops
.to_stopped_by_watchpoint
= remote_stopped_by_watchpoint
;
13082 remote_ops
.to_stopped_data_address
= remote_stopped_data_address
;
13083 remote_ops
.to_watchpoint_addr_within_range
=
13084 remote_watchpoint_addr_within_range
;
13085 remote_ops
.to_can_use_hw_breakpoint
= remote_check_watch_resources
;
13086 remote_ops
.to_insert_hw_breakpoint
= remote_insert_hw_breakpoint
;
13087 remote_ops
.to_remove_hw_breakpoint
= remote_remove_hw_breakpoint
;
13088 remote_ops
.to_region_ok_for_hw_watchpoint
13089 = remote_region_ok_for_hw_watchpoint
;
13090 remote_ops
.to_insert_watchpoint
= remote_insert_watchpoint
;
13091 remote_ops
.to_remove_watchpoint
= remote_remove_watchpoint
;
13092 remote_ops
.to_kill
= remote_kill
;
13093 remote_ops
.to_load
= remote_load
;
13094 remote_ops
.to_mourn_inferior
= remote_mourn
;
13095 remote_ops
.to_pass_signals
= remote_pass_signals
;
13096 remote_ops
.to_set_syscall_catchpoint
= remote_set_syscall_catchpoint
;
13097 remote_ops
.to_program_signals
= remote_program_signals
;
13098 remote_ops
.to_thread_alive
= remote_thread_alive
;
13099 remote_ops
.to_thread_name
= remote_thread_name
;
13100 remote_ops
.to_update_thread_list
= remote_update_thread_list
;
13101 remote_ops
.to_pid_to_str
= remote_pid_to_str
;
13102 remote_ops
.to_extra_thread_info
= remote_threads_extra_info
;
13103 remote_ops
.to_get_ada_task_ptid
= remote_get_ada_task_ptid
;
13104 remote_ops
.to_stop
= remote_stop
;
13105 remote_ops
.to_interrupt
= remote_interrupt
;
13106 remote_ops
.to_check_pending_interrupt
= remote_check_pending_interrupt
;
13107 remote_ops
.to_xfer_partial
= remote_xfer_partial
;
13108 remote_ops
.to_rcmd
= remote_rcmd
;
13109 remote_ops
.to_pid_to_exec_file
= remote_pid_to_exec_file
;
13110 remote_ops
.to_log_command
= serial_log_command
;
13111 remote_ops
.to_get_thread_local_address
= remote_get_thread_local_address
;
13112 remote_ops
.to_stratum
= process_stratum
;
13113 remote_ops
.to_has_all_memory
= default_child_has_all_memory
;
13114 remote_ops
.to_has_memory
= default_child_has_memory
;
13115 remote_ops
.to_has_stack
= default_child_has_stack
;
13116 remote_ops
.to_has_registers
= default_child_has_registers
;
13117 remote_ops
.to_has_execution
= default_child_has_execution
;
13118 remote_ops
.to_has_thread_control
= tc_schedlock
; /* can lock scheduler */
13119 remote_ops
.to_can_execute_reverse
= remote_can_execute_reverse
;
13120 remote_ops
.to_magic
= OPS_MAGIC
;
13121 remote_ops
.to_memory_map
= remote_memory_map
;
13122 remote_ops
.to_flash_erase
= remote_flash_erase
;
13123 remote_ops
.to_flash_done
= remote_flash_done
;
13124 remote_ops
.to_read_description
= remote_read_description
;
13125 remote_ops
.to_search_memory
= remote_search_memory
;
13126 remote_ops
.to_can_async_p
= remote_can_async_p
;
13127 remote_ops
.to_is_async_p
= remote_is_async_p
;
13128 remote_ops
.to_async
= remote_async
;
13129 remote_ops
.to_thread_events
= remote_thread_events
;
13130 remote_ops
.to_can_do_single_step
= remote_can_do_single_step
;
13131 remote_ops
.to_terminal_inferior
= remote_terminal_inferior
;
13132 remote_ops
.to_terminal_ours
= remote_terminal_ours
;
13133 remote_ops
.to_supports_non_stop
= remote_supports_non_stop
;
13134 remote_ops
.to_supports_multi_process
= remote_supports_multi_process
;
13135 remote_ops
.to_supports_disable_randomization
13136 = remote_supports_disable_randomization
;
13137 remote_ops
.to_filesystem_is_local
= remote_filesystem_is_local
;
13138 remote_ops
.to_fileio_open
= remote_hostio_open
;
13139 remote_ops
.to_fileio_pwrite
= remote_hostio_pwrite
;
13140 remote_ops
.to_fileio_pread
= remote_hostio_pread
;
13141 remote_ops
.to_fileio_fstat
= remote_hostio_fstat
;
13142 remote_ops
.to_fileio_close
= remote_hostio_close
;
13143 remote_ops
.to_fileio_unlink
= remote_hostio_unlink
;
13144 remote_ops
.to_fileio_readlink
= remote_hostio_readlink
;
13145 remote_ops
.to_supports_enable_disable_tracepoint
= remote_supports_enable_disable_tracepoint
;
13146 remote_ops
.to_supports_string_tracing
= remote_supports_string_tracing
;
13147 remote_ops
.to_supports_evaluation_of_breakpoint_conditions
= remote_supports_cond_breakpoints
;
13148 remote_ops
.to_can_run_breakpoint_commands
= remote_can_run_breakpoint_commands
;
13149 remote_ops
.to_trace_init
= remote_trace_init
;
13150 remote_ops
.to_download_tracepoint
= remote_download_tracepoint
;
13151 remote_ops
.to_can_download_tracepoint
= remote_can_download_tracepoint
;
13152 remote_ops
.to_download_trace_state_variable
13153 = remote_download_trace_state_variable
;
13154 remote_ops
.to_enable_tracepoint
= remote_enable_tracepoint
;
13155 remote_ops
.to_disable_tracepoint
= remote_disable_tracepoint
;
13156 remote_ops
.to_trace_set_readonly_regions
= remote_trace_set_readonly_regions
;
13157 remote_ops
.to_trace_start
= remote_trace_start
;
13158 remote_ops
.to_get_trace_status
= remote_get_trace_status
;
13159 remote_ops
.to_get_tracepoint_status
= remote_get_tracepoint_status
;
13160 remote_ops
.to_trace_stop
= remote_trace_stop
;
13161 remote_ops
.to_trace_find
= remote_trace_find
;
13162 remote_ops
.to_get_trace_state_variable_value
13163 = remote_get_trace_state_variable_value
;
13164 remote_ops
.to_save_trace_data
= remote_save_trace_data
;
13165 remote_ops
.to_upload_tracepoints
= remote_upload_tracepoints
;
13166 remote_ops
.to_upload_trace_state_variables
13167 = remote_upload_trace_state_variables
;
13168 remote_ops
.to_get_raw_trace_data
= remote_get_raw_trace_data
;
13169 remote_ops
.to_get_min_fast_tracepoint_insn_len
= remote_get_min_fast_tracepoint_insn_len
;
13170 remote_ops
.to_set_disconnected_tracing
= remote_set_disconnected_tracing
;
13171 remote_ops
.to_set_circular_trace_buffer
= remote_set_circular_trace_buffer
;
13172 remote_ops
.to_set_trace_buffer_size
= remote_set_trace_buffer_size
;
13173 remote_ops
.to_set_trace_notes
= remote_set_trace_notes
;
13174 remote_ops
.to_core_of_thread
= remote_core_of_thread
;
13175 remote_ops
.to_verify_memory
= remote_verify_memory
;
13176 remote_ops
.to_get_tib_address
= remote_get_tib_address
;
13177 remote_ops
.to_set_permissions
= remote_set_permissions
;
13178 remote_ops
.to_static_tracepoint_marker_at
13179 = remote_static_tracepoint_marker_at
;
13180 remote_ops
.to_static_tracepoint_markers_by_strid
13181 = remote_static_tracepoint_markers_by_strid
;
13182 remote_ops
.to_traceframe_info
= remote_traceframe_info
;
13183 remote_ops
.to_use_agent
= remote_use_agent
;
13184 remote_ops
.to_can_use_agent
= remote_can_use_agent
;
13185 remote_ops
.to_supports_btrace
= remote_supports_btrace
;
13186 remote_ops
.to_enable_btrace
= remote_enable_btrace
;
13187 remote_ops
.to_disable_btrace
= remote_disable_btrace
;
13188 remote_ops
.to_teardown_btrace
= remote_teardown_btrace
;
13189 remote_ops
.to_read_btrace
= remote_read_btrace
;
13190 remote_ops
.to_btrace_conf
= remote_btrace_conf
;
13191 remote_ops
.to_augmented_libraries_svr4_read
=
13192 remote_augmented_libraries_svr4_read
;
13193 remote_ops
.to_follow_fork
= remote_follow_fork
;
13194 remote_ops
.to_follow_exec
= remote_follow_exec
;
13195 remote_ops
.to_insert_fork_catchpoint
= remote_insert_fork_catchpoint
;
13196 remote_ops
.to_remove_fork_catchpoint
= remote_remove_fork_catchpoint
;
13197 remote_ops
.to_insert_vfork_catchpoint
= remote_insert_vfork_catchpoint
;
13198 remote_ops
.to_remove_vfork_catchpoint
= remote_remove_vfork_catchpoint
;
13199 remote_ops
.to_insert_exec_catchpoint
= remote_insert_exec_catchpoint
;
13200 remote_ops
.to_remove_exec_catchpoint
= remote_remove_exec_catchpoint
;
13203 /* Set up the extended remote vector by making a copy of the standard
13204 remote vector and adding to it. */
13207 init_extended_remote_ops (void)
13209 extended_remote_ops
= remote_ops
;
13211 extended_remote_ops
.to_shortname
= "extended-remote";
13212 extended_remote_ops
.to_longname
=
13213 "Extended remote serial target in gdb-specific protocol";
13214 extended_remote_ops
.to_doc
=
13215 "Use a remote computer via a serial line, using a gdb-specific protocol.\n\
13216 Specify the serial device it is connected to (e.g. /dev/ttya).";
13217 extended_remote_ops
.to_open
= extended_remote_open
;
13218 extended_remote_ops
.to_create_inferior
= extended_remote_create_inferior
;
13219 extended_remote_ops
.to_detach
= extended_remote_detach
;
13220 extended_remote_ops
.to_attach
= extended_remote_attach
;
13221 extended_remote_ops
.to_post_attach
= extended_remote_post_attach
;
13222 extended_remote_ops
.to_supports_disable_randomization
13223 = extended_remote_supports_disable_randomization
;
13227 remote_can_async_p (struct target_ops
*ops
)
13229 struct remote_state
*rs
= get_remote_state ();
13231 if (!target_async_permitted
)
13232 /* We only enable async when the user specifically asks for it. */
13235 /* We're async whenever the serial device is. */
13236 return serial_can_async_p (rs
->remote_desc
);
13240 remote_is_async_p (struct target_ops
*ops
)
13242 struct remote_state
*rs
= get_remote_state ();
13244 if (!target_async_permitted
)
13245 /* We only enable async when the user specifically asks for it. */
13248 /* We're async whenever the serial device is. */
13249 return serial_is_async_p (rs
->remote_desc
);
13252 /* Pass the SERIAL event on and up to the client. One day this code
13253 will be able to delay notifying the client of an event until the
13254 point where an entire packet has been received. */
13256 static serial_event_ftype remote_async_serial_handler
;
13259 remote_async_serial_handler (struct serial
*scb
, void *context
)
13261 /* Don't propogate error information up to the client. Instead let
13262 the client find out about the error by querying the target. */
13263 inferior_event_handler (INF_REG_EVENT
, NULL
);
13267 remote_async_inferior_event_handler (gdb_client_data data
)
13269 inferior_event_handler (INF_REG_EVENT
, NULL
);
13273 remote_async (struct target_ops
*ops
, int enable
)
13275 struct remote_state
*rs
= get_remote_state ();
13279 serial_async (rs
->remote_desc
, remote_async_serial_handler
, rs
);
13281 /* If there are pending events in the stop reply queue tell the
13282 event loop to process them. */
13283 if (!QUEUE_is_empty (stop_reply_p
, stop_reply_queue
))
13284 mark_async_event_handler (remote_async_inferior_event_token
);
13285 /* For simplicity, below we clear the pending events token
13286 without remembering whether it is marked, so here we always
13287 mark it. If there's actually no pending notification to
13288 process, this ends up being a no-op (other than a spurious
13289 event-loop wakeup). */
13290 if (target_is_non_stop_p ())
13291 mark_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13295 serial_async (rs
->remote_desc
, NULL
, NULL
);
13296 /* If the core is disabling async, it doesn't want to be
13297 disturbed with target events. Clear all async event sources
13299 clear_async_event_handler (remote_async_inferior_event_token
);
13300 if (target_is_non_stop_p ())
13301 clear_async_event_handler (rs
->notif_state
->get_pending_events_token
);
13305 /* Implementation of the to_thread_events method. */
13308 remote_thread_events (struct target_ops
*ops
, int enable
)
13310 struct remote_state
*rs
= get_remote_state ();
13311 size_t size
= get_remote_packet_size ();
13313 if (packet_support (PACKET_QThreadEvents
) == PACKET_DISABLE
)
13316 xsnprintf (rs
->buf
, size
, "QThreadEvents:%x", enable
? 1 : 0);
13318 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13320 switch (packet_ok (rs
->buf
,
13321 &remote_protocol_packets
[PACKET_QThreadEvents
]))
13324 if (strcmp (rs
->buf
, "OK") != 0)
13325 error (_("Remote refused setting thread events: %s"), rs
->buf
);
13328 warning (_("Remote failure reply: %s"), rs
->buf
);
13330 case PACKET_UNKNOWN
:
13336 set_remote_cmd (char *args
, int from_tty
)
13338 help_list (remote_set_cmdlist
, "set remote ", all_commands
, gdb_stdout
);
13342 show_remote_cmd (char *args
, int from_tty
)
13344 /* We can't just use cmd_show_list here, because we want to skip
13345 the redundant "show remote Z-packet" and the legacy aliases. */
13346 struct cleanup
*showlist_chain
;
13347 struct cmd_list_element
*list
= remote_show_cmdlist
;
13348 struct ui_out
*uiout
= current_uiout
;
13350 showlist_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "showlist");
13351 for (; list
!= NULL
; list
= list
->next
)
13352 if (strcmp (list
->name
, "Z-packet") == 0)
13354 else if (list
->type
== not_set_cmd
)
13355 /* Alias commands are exactly like the original, except they
13356 don't have the normal type. */
13360 struct cleanup
*option_chain
13361 = make_cleanup_ui_out_tuple_begin_end (uiout
, "option");
13363 ui_out_field_string (uiout
, "name", list
->name
);
13364 ui_out_text (uiout
, ": ");
13365 if (list
->type
== show_cmd
)
13366 do_show_command ((char *) NULL
, from_tty
, list
);
13368 cmd_func (list
, NULL
, from_tty
);
13369 /* Close the tuple. */
13370 do_cleanups (option_chain
);
13373 /* Close the tuple. */
13374 do_cleanups (showlist_chain
);
13378 /* Function to be called whenever a new objfile (shlib) is detected. */
13380 remote_new_objfile (struct objfile
*objfile
)
13382 struct remote_state
*rs
= get_remote_state ();
13384 if (rs
->remote_desc
!= 0) /* Have a remote connection. */
13385 remote_check_symbols ();
13388 /* Pull all the tracepoints defined on the target and create local
13389 data structures representing them. We don't want to create real
13390 tracepoints yet, we don't want to mess up the user's existing
13394 remote_upload_tracepoints (struct target_ops
*self
, struct uploaded_tp
**utpp
)
13396 struct remote_state
*rs
= get_remote_state ();
13399 /* Ask for a first packet of tracepoint definition. */
13401 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13403 while (*p
&& *p
!= 'l')
13405 parse_tracepoint_definition (p
, utpp
);
13406 /* Ask for another packet of tracepoint definition. */
13408 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13415 remote_upload_trace_state_variables (struct target_ops
*self
,
13416 struct uploaded_tsv
**utsvp
)
13418 struct remote_state
*rs
= get_remote_state ();
13421 /* Ask for a first packet of variable definition. */
13423 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13425 while (*p
&& *p
!= 'l')
13427 parse_tsv_definition (p
, utsvp
);
13428 /* Ask for another packet of variable definition. */
13430 getpkt (&rs
->buf
, &rs
->buf_size
, 0);
13436 /* The "set/show range-stepping" show hook. */
13439 show_range_stepping (struct ui_file
*file
, int from_tty
,
13440 struct cmd_list_element
*c
,
13443 fprintf_filtered (file
,
13444 _("Debugger's willingness to use range stepping "
13445 "is %s.\n"), value
);
13448 /* The "set/show range-stepping" set hook. */
13451 set_range_stepping (char *ignore_args
, int from_tty
,
13452 struct cmd_list_element
*c
)
13454 struct remote_state
*rs
= get_remote_state ();
13456 /* Whene enabling, check whether range stepping is actually
13457 supported by the target, and warn if not. */
13458 if (use_range_stepping
)
13460 if (rs
->remote_desc
!= NULL
)
13462 if (packet_support (PACKET_vCont
) == PACKET_SUPPORT_UNKNOWN
)
13463 remote_vcont_probe (rs
);
13465 if (packet_support (PACKET_vCont
) == PACKET_ENABLE
13466 && rs
->supports_vCont
.r
)
13470 warning (_("Range stepping is not supported by the current target"));
13475 _initialize_remote (void)
13477 struct cmd_list_element
*cmd
;
13478 const char *cmd_name
;
13480 /* architecture specific data */
13481 remote_gdbarch_data_handle
=
13482 gdbarch_data_register_post_init (init_remote_state
);
13483 remote_g_packet_data_handle
=
13484 gdbarch_data_register_pre_init (remote_g_packet_data_init
);
13487 = register_program_space_data_with_cleanup (NULL
,
13488 remote_pspace_data_cleanup
);
13490 /* Initialize the per-target state. At the moment there is only one
13491 of these, not one per target. Only one target is active at a
13493 remote_state
= new_remote_state ();
13495 init_remote_ops ();
13496 add_target (&remote_ops
);
13498 init_extended_remote_ops ();
13499 add_target (&extended_remote_ops
);
13501 /* Hook into new objfile notification. */
13502 observer_attach_new_objfile (remote_new_objfile
);
13503 /* We're no longer interested in notification events of an inferior
13505 observer_attach_inferior_exit (discard_pending_stop_replies
);
13507 /* Set up signal handlers. */
13508 async_sigint_remote_token
=
13509 create_async_signal_handler (async_remote_interrupt
, NULL
);
13510 async_sigint_remote_twice_token
=
13511 create_async_signal_handler (async_remote_interrupt_twice
, NULL
);
13514 init_remote_threadtests ();
13517 stop_reply_queue
= QUEUE_alloc (stop_reply_p
, stop_reply_xfree
);
13518 /* set/show remote ... */
13520 add_prefix_cmd ("remote", class_maintenance
, set_remote_cmd
, _("\
13521 Remote protocol specific variables\n\
13522 Configure various remote-protocol specific variables such as\n\
13523 the packets being used"),
13524 &remote_set_cmdlist
, "set remote ",
13525 0 /* allow-unknown */, &setlist
);
13526 add_prefix_cmd ("remote", class_maintenance
, show_remote_cmd
, _("\
13527 Remote protocol specific variables\n\
13528 Configure various remote-protocol specific variables such as\n\
13529 the packets being used"),
13530 &remote_show_cmdlist
, "show remote ",
13531 0 /* allow-unknown */, &showlist
);
13533 add_cmd ("compare-sections", class_obscure
, compare_sections_command
, _("\
13534 Compare section data on target to the exec file.\n\
13535 Argument is a single section name (default: all loaded sections).\n\
13536 To compare only read-only loaded sections, specify the -r option."),
13539 add_cmd ("packet", class_maintenance
, packet_command
, _("\
13540 Send an arbitrary packet to a remote target.\n\
13541 maintenance packet TEXT\n\
13542 If GDB is talking to an inferior via the GDB serial protocol, then\n\
13543 this command sends the string TEXT to the inferior, and displays the\n\
13544 response packet. GDB supplies the initial `$' character, and the\n\
13545 terminating `#' character and checksum."),
13548 add_setshow_boolean_cmd ("remotebreak", no_class
, &remote_break
, _("\
13549 Set whether to send break if interrupted."), _("\
13550 Show whether to send break if interrupted."), _("\
13551 If set, a break, instead of a cntrl-c, is sent to the remote target."),
13552 set_remotebreak
, show_remotebreak
,
13553 &setlist
, &showlist
);
13554 cmd_name
= "remotebreak";
13555 cmd
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
13556 deprecate_cmd (cmd
, "set remote interrupt-sequence");
13557 cmd_name
= "remotebreak"; /* needed because lookup_cmd updates the pointer */
13558 cmd
= lookup_cmd (&cmd_name
, showlist
, "", -1, 1);
13559 deprecate_cmd (cmd
, "show remote interrupt-sequence");
13561 add_setshow_enum_cmd ("interrupt-sequence", class_support
,
13562 interrupt_sequence_modes
, &interrupt_sequence_mode
,
13564 Set interrupt sequence to remote target."), _("\
13565 Show interrupt sequence to remote target."), _("\
13566 Valid value is \"Ctrl-C\", \"BREAK\" or \"BREAK-g\". The default is \"Ctrl-C\"."),
13567 NULL
, show_interrupt_sequence
,
13568 &remote_set_cmdlist
,
13569 &remote_show_cmdlist
);
13571 add_setshow_boolean_cmd ("interrupt-on-connect", class_support
,
13572 &interrupt_on_connect
, _("\
13573 Set whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13574 Show whether interrupt-sequence is sent to remote target when gdb connects to."), _(" \
13575 If set, interrupt sequence is sent to remote target."),
13577 &remote_set_cmdlist
, &remote_show_cmdlist
);
13579 /* Install commands for configuring memory read/write packets. */
13581 add_cmd ("remotewritesize", no_class
, set_memory_write_packet_size
, _("\
13582 Set the maximum number of bytes per memory write packet (deprecated)."),
13584 add_cmd ("remotewritesize", no_class
, show_memory_write_packet_size
, _("\
13585 Show the maximum number of bytes per memory write packet (deprecated)."),
13587 add_cmd ("memory-write-packet-size", no_class
,
13588 set_memory_write_packet_size
, _("\
13589 Set the maximum number of bytes per memory-write packet.\n\
13590 Specify the number of bytes in a packet or 0 (zero) for the\n\
13591 default packet size. The actual limit is further reduced\n\
13592 dependent on the target. Specify ``fixed'' to disable the\n\
13593 further restriction and ``limit'' to enable that restriction."),
13594 &remote_set_cmdlist
);
13595 add_cmd ("memory-read-packet-size", no_class
,
13596 set_memory_read_packet_size
, _("\
13597 Set the maximum number of bytes per memory-read packet.\n\
13598 Specify the number of bytes in a packet or 0 (zero) for the\n\
13599 default packet size. The actual limit is further reduced\n\
13600 dependent on the target. Specify ``fixed'' to disable the\n\
13601 further restriction and ``limit'' to enable that restriction."),
13602 &remote_set_cmdlist
);
13603 add_cmd ("memory-write-packet-size", no_class
,
13604 show_memory_write_packet_size
,
13605 _("Show the maximum number of bytes per memory-write packet."),
13606 &remote_show_cmdlist
);
13607 add_cmd ("memory-read-packet-size", no_class
,
13608 show_memory_read_packet_size
,
13609 _("Show the maximum number of bytes per memory-read packet."),
13610 &remote_show_cmdlist
);
13612 add_setshow_zinteger_cmd ("hardware-watchpoint-limit", no_class
,
13613 &remote_hw_watchpoint_limit
, _("\
13614 Set the maximum number of target hardware watchpoints."), _("\
13615 Show the maximum number of target hardware watchpoints."), _("\
13616 Specify a negative limit for unlimited."),
13617 NULL
, NULL
, /* FIXME: i18n: The maximum
13618 number of target hardware
13619 watchpoints is %s. */
13620 &remote_set_cmdlist
, &remote_show_cmdlist
);
13621 add_setshow_zinteger_cmd ("hardware-watchpoint-length-limit", no_class
,
13622 &remote_hw_watchpoint_length_limit
, _("\
13623 Set the maximum length (in bytes) of a target hardware watchpoint."), _("\
13624 Show the maximum length (in bytes) of a target hardware watchpoint."), _("\
13625 Specify a negative limit for unlimited."),
13626 NULL
, NULL
, /* FIXME: i18n: The maximum
13627 length (in bytes) of a target
13628 hardware watchpoint is %s. */
13629 &remote_set_cmdlist
, &remote_show_cmdlist
);
13630 add_setshow_zinteger_cmd ("hardware-breakpoint-limit", no_class
,
13631 &remote_hw_breakpoint_limit
, _("\
13632 Set the maximum number of target hardware breakpoints."), _("\
13633 Show the maximum number of target hardware breakpoints."), _("\
13634 Specify a negative limit for unlimited."),
13635 NULL
, NULL
, /* FIXME: i18n: The maximum
13636 number of target hardware
13637 breakpoints is %s. */
13638 &remote_set_cmdlist
, &remote_show_cmdlist
);
13640 add_setshow_zuinteger_cmd ("remoteaddresssize", class_obscure
,
13641 &remote_address_size
, _("\
13642 Set the maximum size of the address (in bits) in a memory packet."), _("\
13643 Show the maximum size of the address (in bits) in a memory packet."), NULL
,
13645 NULL
, /* FIXME: i18n: */
13646 &setlist
, &showlist
);
13648 init_all_packet_configs ();
13650 add_packet_config_cmd (&remote_protocol_packets
[PACKET_X
],
13651 "X", "binary-download", 1);
13653 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCont
],
13654 "vCont", "verbose-resume", 0);
13656 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QPassSignals
],
13657 "QPassSignals", "pass-signals", 0);
13659 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QCatchSyscalls
],
13660 "QCatchSyscalls", "catch-syscalls", 0);
13662 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QProgramSignals
],
13663 "QProgramSignals", "program-signals", 0);
13665 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSymbol
],
13666 "qSymbol", "symbol-lookup", 0);
13668 add_packet_config_cmd (&remote_protocol_packets
[PACKET_P
],
13669 "P", "set-register", 1);
13671 add_packet_config_cmd (&remote_protocol_packets
[PACKET_p
],
13672 "p", "fetch-register", 1);
13674 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z0
],
13675 "Z0", "software-breakpoint", 0);
13677 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z1
],
13678 "Z1", "hardware-breakpoint", 0);
13680 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z2
],
13681 "Z2", "write-watchpoint", 0);
13683 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z3
],
13684 "Z3", "read-watchpoint", 0);
13686 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Z4
],
13687 "Z4", "access-watchpoint", 0);
13689 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_auxv
],
13690 "qXfer:auxv:read", "read-aux-vector", 0);
13692 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_exec_file
],
13693 "qXfer:exec-file:read", "pid-to-exec-file", 0);
13695 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_features
],
13696 "qXfer:features:read", "target-features", 0);
13698 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries
],
13699 "qXfer:libraries:read", "library-info", 0);
13701 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_libraries_svr4
],
13702 "qXfer:libraries-svr4:read", "library-info-svr4", 0);
13704 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_memory_map
],
13705 "qXfer:memory-map:read", "memory-map", 0);
13707 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_read
],
13708 "qXfer:spu:read", "read-spu-object", 0);
13710 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_spu_write
],
13711 "qXfer:spu:write", "write-spu-object", 0);
13713 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_osdata
],
13714 "qXfer:osdata:read", "osdata", 0);
13716 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_threads
],
13717 "qXfer:threads:read", "threads", 0);
13719 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_read
],
13720 "qXfer:siginfo:read", "read-siginfo-object", 0);
13722 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_siginfo_write
],
13723 "qXfer:siginfo:write", "write-siginfo-object", 0);
13725 add_packet_config_cmd
13726 (&remote_protocol_packets
[PACKET_qXfer_traceframe_info
],
13727 "qXfer:traceframe-info:read", "traceframe-info", 0);
13729 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_uib
],
13730 "qXfer:uib:read", "unwind-info-block", 0);
13732 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTLSAddr
],
13733 "qGetTLSAddr", "get-thread-local-storage-address",
13736 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qGetTIBAddr
],
13737 "qGetTIBAddr", "get-thread-information-block-address",
13740 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bc
],
13741 "bc", "reverse-continue", 0);
13743 add_packet_config_cmd (&remote_protocol_packets
[PACKET_bs
],
13744 "bs", "reverse-step", 0);
13746 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSupported
],
13747 "qSupported", "supported-packets", 0);
13749 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qSearch_memory
],
13750 "qSearch:memory", "search-memory", 0);
13752 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qTStatus
],
13753 "qTStatus", "trace-status", 0);
13755 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_setfs
],
13756 "vFile:setfs", "hostio-setfs", 0);
13758 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_open
],
13759 "vFile:open", "hostio-open", 0);
13761 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pread
],
13762 "vFile:pread", "hostio-pread", 0);
13764 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_pwrite
],
13765 "vFile:pwrite", "hostio-pwrite", 0);
13767 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_close
],
13768 "vFile:close", "hostio-close", 0);
13770 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_unlink
],
13771 "vFile:unlink", "hostio-unlink", 0);
13773 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_readlink
],
13774 "vFile:readlink", "hostio-readlink", 0);
13776 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vFile_fstat
],
13777 "vFile:fstat", "hostio-fstat", 0);
13779 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vAttach
],
13780 "vAttach", "attach", 0);
13782 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vRun
],
13785 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QStartNoAckMode
],
13786 "QStartNoAckMode", "noack", 0);
13788 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vKill
],
13789 "vKill", "kill", 0);
13791 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qAttached
],
13792 "qAttached", "query-attached", 0);
13794 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalTracepoints
],
13795 "ConditionalTracepoints",
13796 "conditional-tracepoints", 0);
13798 add_packet_config_cmd (&remote_protocol_packets
[PACKET_ConditionalBreakpoints
],
13799 "ConditionalBreakpoints",
13800 "conditional-breakpoints", 0);
13802 add_packet_config_cmd (&remote_protocol_packets
[PACKET_BreakpointCommands
],
13803 "BreakpointCommands",
13804 "breakpoint-commands", 0);
13806 add_packet_config_cmd (&remote_protocol_packets
[PACKET_FastTracepoints
],
13807 "FastTracepoints", "fast-tracepoints", 0);
13809 add_packet_config_cmd (&remote_protocol_packets
[PACKET_TracepointSource
],
13810 "TracepointSource", "TracepointSource", 0);
13812 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAllow
],
13813 "QAllow", "allow", 0);
13815 add_packet_config_cmd (&remote_protocol_packets
[PACKET_StaticTracepoints
],
13816 "StaticTracepoints", "static-tracepoints", 0);
13818 add_packet_config_cmd (&remote_protocol_packets
[PACKET_InstallInTrace
],
13819 "InstallInTrace", "install-in-trace", 0);
13821 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_statictrace_read
],
13822 "qXfer:statictrace:read", "read-sdata-object", 0);
13824 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_fdpic
],
13825 "qXfer:fdpic:read", "read-fdpic-loadmap", 0);
13827 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QDisableRandomization
],
13828 "QDisableRandomization", "disable-randomization", 0);
13830 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QAgent
],
13831 "QAgent", "agent", 0);
13833 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QTBuffer_size
],
13834 "QTBuffer:size", "trace-buffer-size", 0);
13836 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_off
],
13837 "Qbtrace:off", "disable-btrace", 0);
13839 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_bts
],
13840 "Qbtrace:bts", "enable-btrace-bts", 0);
13842 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_pt
],
13843 "Qbtrace:pt", "enable-btrace-pt", 0);
13845 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace
],
13846 "qXfer:btrace", "read-btrace", 0);
13848 add_packet_config_cmd (&remote_protocol_packets
[PACKET_qXfer_btrace_conf
],
13849 "qXfer:btrace-conf", "read-btrace-conf", 0);
13851 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_bts_size
],
13852 "Qbtrace-conf:bts:size", "btrace-conf-bts-size", 0);
13854 add_packet_config_cmd (&remote_protocol_packets
[PACKET_multiprocess_feature
],
13855 "multiprocess-feature", "multiprocess-feature", 0);
13857 add_packet_config_cmd (&remote_protocol_packets
[PACKET_swbreak_feature
],
13858 "swbreak-feature", "swbreak-feature", 0);
13860 add_packet_config_cmd (&remote_protocol_packets
[PACKET_hwbreak_feature
],
13861 "hwbreak-feature", "hwbreak-feature", 0);
13863 add_packet_config_cmd (&remote_protocol_packets
[PACKET_fork_event_feature
],
13864 "fork-event-feature", "fork-event-feature", 0);
13866 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vfork_event_feature
],
13867 "vfork-event-feature", "vfork-event-feature", 0);
13869 add_packet_config_cmd (&remote_protocol_packets
[PACKET_Qbtrace_conf_pt_size
],
13870 "Qbtrace-conf:pt:size", "btrace-conf-pt-size", 0);
13872 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vContSupported
],
13873 "vContSupported", "verbose-resume-supported", 0);
13875 add_packet_config_cmd (&remote_protocol_packets
[PACKET_exec_event_feature
],
13876 "exec-event-feature", "exec-event-feature", 0);
13878 add_packet_config_cmd (&remote_protocol_packets
[PACKET_vCtrlC
],
13879 "vCtrlC", "ctrl-c", 0);
13881 add_packet_config_cmd (&remote_protocol_packets
[PACKET_QThreadEvents
],
13882 "QThreadEvents", "thread-events", 0);
13884 add_packet_config_cmd (&remote_protocol_packets
[PACKET_no_resumed
],
13885 "N stop reply", "no-resumed-stop-reply", 0);
13887 /* Assert that we've registered "set remote foo-packet" commands
13888 for all packet configs. */
13892 for (i
= 0; i
< PACKET_MAX
; i
++)
13894 /* Ideally all configs would have a command associated. Some
13895 still don't though. */
13900 case PACKET_QNonStop
:
13901 case PACKET_EnableDisableTracepoints_feature
:
13902 case PACKET_tracenz_feature
:
13903 case PACKET_DisconnectedTracing_feature
:
13904 case PACKET_augmented_libraries_svr4_read_feature
:
13906 /* Additions to this list need to be well justified:
13907 pre-existing packets are OK; new packets are not. */
13915 /* This catches both forgetting to add a config command, and
13916 forgetting to remove a packet from the exception list. */
13917 gdb_assert (excepted
== (remote_protocol_packets
[i
].name
== NULL
));
13921 /* Keep the old ``set remote Z-packet ...'' working. Each individual
13922 Z sub-packet has its own set and show commands, but users may
13923 have sets to this variable in their .gdbinit files (or in their
13925 add_setshow_auto_boolean_cmd ("Z-packet", class_obscure
,
13926 &remote_Z_packet_detect
, _("\
13927 Set use of remote protocol `Z' packets"), _("\
13928 Show use of remote protocol `Z' packets "), _("\
13929 When set, GDB will attempt to use the remote breakpoint and watchpoint\n\
13931 set_remote_protocol_Z_packet_cmd
,
13932 show_remote_protocol_Z_packet_cmd
,
13933 /* FIXME: i18n: Use of remote protocol
13934 `Z' packets is %s. */
13935 &remote_set_cmdlist
, &remote_show_cmdlist
);
13937 add_prefix_cmd ("remote", class_files
, remote_command
, _("\
13938 Manipulate files on the remote system\n\
13939 Transfer files to and from the remote target system."),
13940 &remote_cmdlist
, "remote ",
13941 0 /* allow-unknown */, &cmdlist
);
13943 add_cmd ("put", class_files
, remote_put_command
,
13944 _("Copy a local file to the remote system."),
13947 add_cmd ("get", class_files
, remote_get_command
,
13948 _("Copy a remote file to the local system."),
13951 add_cmd ("delete", class_files
, remote_delete_command
,
13952 _("Delete a remote file."),
13955 add_setshow_string_noescape_cmd ("exec-file", class_files
,
13956 &remote_exec_file_var
, _("\
13957 Set the remote pathname for \"run\""), _("\
13958 Show the remote pathname for \"run\""), NULL
,
13959 set_remote_exec_file
,
13960 show_remote_exec_file
,
13961 &remote_set_cmdlist
,
13962 &remote_show_cmdlist
);
13964 add_setshow_boolean_cmd ("range-stepping", class_run
,
13965 &use_range_stepping
, _("\
13966 Enable or disable range stepping."), _("\
13967 Show whether target-assisted range stepping is enabled."), _("\
13968 If on, and the target supports it, when stepping a source line, GDB\n\
13969 tells the target to step the corresponding range of addresses itself instead\n\
13970 of issuing multiple single-steps. This speeds up source level\n\
13971 stepping. If off, GDB always issues single-steps, even if range\n\
13972 stepping is supported by the target. The default is on."),
13973 set_range_stepping
,
13974 show_range_stepping
,
13978 /* Eventually initialize fileio. See fileio.c */
13979 initialize_remote_fileio (remote_set_cmdlist
, remote_show_cmdlist
);
13981 /* Take advantage of the fact that the TID field is not used, to tag
13982 special ptids with it set to != 0. */
13983 magic_null_ptid
= ptid_build (42000, -1, 1);
13984 not_sent_ptid
= ptid_build (42000, -2, 1);
13985 any_thread_ptid
= ptid_build (42000, 0, 1);
13987 target_buf_size
= 2048;
13988 target_buf
= (char *) xmalloc (target_buf_size
);